/* ==========================================
   文件：public/style.css（同学端与后台共享样式）
   顺序：变量主题 → 基础布局 → 页面骨架 → 同学端业务 → 互动 → 后台 → 响应式覆盖
   说明：新增样式必须归入对应业务区块，不要继续追加到文件末尾
========================================== */

/* ==========================================
   1. 全局颜色配置 (含深浅色模式与滚动条主题适配)
========================================== */
:root {
    color-scheme: light;
    --bg-color: #f8f7f4;
    --text-color: #2c2e33;
    --title-color: #16181d;
    --date-color: #8c8f96;
    --line-color: #e8e5df;
    --mask-bg: rgba(248, 247, 244, 0.86);
    --card-bg: #ffffff;
    --accent-color: #ff5a5f;
    --accent-gradient: linear-gradient(135deg, #ff6b6b, #ff4757);
    --accent-soft: rgba(255, 90, 95, 0.12);
    --card-shadow: 0 4px 18px rgba(22, 24, 29, 0.035);
}

html.dark-mode,
body.dark-mode {
    color-scheme: dark;
    --bg-color: #13151a;
    --text-color: #d1d5db;
    --title-color: #f3f4f6;
    --date-color: #7d8492;
    --line-color: #262a34;
    --mask-bg: rgba(19, 21, 26, 0.86); 
    --card-bg: #1c1f26;
    --accent-color: #ff6b70;
    --accent-gradient: linear-gradient(135deg, #ff7875, #ff5252);
    --accent-soft: rgba(255, 107, 112, 0.16);
    --card-shadow: 0 6px 22px rgba(0, 0, 0, 0.28);
}

/* 全局滚动条自适应主题样式：平时隐藏，仅在滚动时（.is-scrolling）呈现 */
* {
    scrollbar-width: thin;
    scrollbar-color: transparent transparent;
}

html.is-scrolling,
body.is-scrolling,
.is-scrolling {
    scrollbar-color: rgba(255, 90, 95, 0.42) transparent;
}

body.dark-mode.is-scrolling,
body.dark-mode .is-scrolling {
    scrollbar-color: rgba(64, 169, 255, 0.45) transparent;
}

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent !important;
}

::-webkit-scrollbar-thumb {
    background: transparent !important;
    border-radius: 6px;
    transition: background-color 0.3s ease;
}

html.is-scrolling::-webkit-scrollbar-thumb,
body.is-scrolling::-webkit-scrollbar-thumb,
.is-scrolling::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, rgba(255, 90, 95, 0.55), rgba(0, 136, 204, 0.55)) !important;
}

body.dark-mode.is-scrolling::-webkit-scrollbar-thumb,
body.dark-mode .is-scrolling::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, rgba(255, 107, 112, 0.6), rgba(64, 169, 255, 0.6)) !important;
}

/* ==========================================
   2. 基础排版与 App 适配
========================================== */
* {
    -webkit-tap-highlight-color: transparent; /* 禁用 App 端所有元素的点击高亮蓝底 */
}
html { 
    background-color: var(--bg-color);
    transition: background-color 0.3s;
    overscroll-behavior-y: none; /* 禁用系统级下拉过度拉伸与橡皮筋回弹 */
    overflow-x: hidden; /* 彻底根除视口级别因过渡动效瞬间横向溢出闪现横向滚动条的问题 */
}

body { 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif; 
    background-color: var(--bg-color); 
    color: var(--text-color); 
    margin: 0; 
    padding: calc(20px + env(safe-area-inset-top, 0px)) 20px calc(90px + env(safe-area-inset-bottom, 0px)); 
    box-sizing: border-box; 
    display: flex; 
    flex-direction: column; 
    align-items: center; 
    justify-content: flex-start; 
    transition: background-color 0.3s, color 0.3s; 
    min-height: 100vh; 
    min-height: 100dvh;
    overscroll-behavior-y: none; /* 防止整页滚动连带触发系统视口回弹 */
    overflow-x: clip; /* 裁切水平溢出且不建立独立滚动容器，确保不破坏时间轴 sticky 吸顶 */
}

body.is-app {
    padding-top: max(38px, calc(20px + env(safe-area-inset-top, 0px)));
}

body.is-app::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: max(38px, calc(20px + env(safe-area-inset-top, 0px)));
    background: var(--bg-color);
    z-index: 99;
    pointer-events: none;
}

body.sidebar-open::before {
    display: none !important;
}

body.is-app .modal-hint-zone,
body.is-app .modal-zoom-hint {
    display: none !important;
}

body.is-app .modal-download,
body.is-app .close-modal {
    top: max(50px, calc(42px + env(safe-area-inset-top, 0px))) !important;
}

/* 平板/桌面（>768px）展开右侧缩略图抽屉时，隐藏下层大图右上角关闭按钮，防止与抽屉内关闭按钮重叠 */
@media (min-width: 769px) {
    #photo-modal.thumbs-drawer-open .close-modal {
        opacity: 0 !important;
        pointer-events: none !important;
    }

    /* 避让平板顶部状态栏安全区，防止“图片预览”标题与关闭按钮被状态栏遮挡 */
    .modal-thumbs-header {
        padding-top: env(safe-area-inset-top, 0px);
        height: calc(56px + env(safe-area-inset-top, 0px));
        box-sizing: border-box;
    }

    .modal-thumbs-progress {
        top: calc(60px + env(safe-area-inset-top, 0px));
    }

    body.is-app .modal-thumbs-header {
        padding-top: max(38px, calc(20px + env(safe-area-inset-top, 0px))) !important;
        height: calc(52px + max(38px, calc(20px + env(safe-area-inset-top, 0px)))) !important;
        box-sizing: border-box !important;
    }

    body.is-app .modal-thumbs-progress {
        top: calc(56px + max(38px, calc(20px + env(safe-area-inset-top, 0px)))) !important;
    }
}

body.is-app #modal-img-container {
    padding-top: 0 !important;
}

body.is-app .modal-slide {
    padding-top: max(90px, calc(70px + env(safe-area-inset-top, 0px))) !important;
    padding-bottom: max(60px, calc(40px + env(safe-area-inset-bottom, 0px))) !important;
}
#main-content, #admin-panel {
    width: 100%;
    max-width: 1000px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: stretch;
}

.hidden { 
    display: none !important; 
}

/* ==========================================
   3. 全局预加载屏与下拉刷新
========================================== */
.loading-screen { 
    position: fixed; 
    inset: 0; 
    z-index: 9999; 
    background-color: var(--bg-color); 
    display: flex; 
    flex-direction: column; 
    align-items: center; 
    justify-content: center; 
    transition: opacity 0.4s ease; 
}

.spinner { 
    width: 40px; 
    height: 40px; 
    border: 4px solid var(--line-color); 
    border-top: 4px solid #0066cc; 
    border-radius: 50%; 
    animation: spin 1s linear infinite; 
}

@keyframes spin { 
    100% { transform: rotate(360deg); } 
}

.ptr-indicator {
    width: 100%;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    text-align: center;
    font-size: 13px;
    color: var(--date-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: opacity 0.25s ease, max-height 0.25s ease, margin-bottom 0.25s ease;
    margin-bottom: 0;
    pointer-events: none;
}

/* ==========================================
   4. 时间轴主干与吸顶标题 (含刘海屏安全区适配)
========================================== */
.header { 
    width: 100%; 
    max-width: 1000px; 
    text-align: left; 
    box-sizing: border-box;
    margin-top: 20px;
    margin-bottom: 15px;
}
/* App 端头部标题沉降优化：消除与沉浸式状态栏安全区叠加导致的偏下问题 */
body.is-app .header {
    margin-top: 8px;
    margin-bottom: 12px;
}
.header h1 {
    font-size: 28px;
    margin: 0 0 6px 0;
    color: var(--title-color);
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.header p {
    margin: 0;
    font-size: 15px;
    color: var(--date-color);
    line-height: 1.5;
}

.timeline { 
    position: relative; 
    padding-left: 20px; 
    transform: none !important; 
    width: 100%; 
    max-width: 1000px; 
    text-align: left; 
    box-sizing: border-box;
    transition: opacity 0.2s ease;
}

.timeline::before { 
    content: ''; 
    position: absolute; 
    top: 40px; 
    bottom: 0; 
    left: 0; 
    width: 2px; 
    background-color: var(--line-color); 
    z-index: 0; 
}

.year-marker, .month-marker { 
    position: sticky; 
    display: block; 
    backdrop-filter: blur(10px); 
    -webkit-backdrop-filter: blur(10px); 
    box-sizing: border-box; 
    width: calc(100% + 20px); 
    background: var(--bg-color); 
    font-weight: bold; 
    scroll-margin-top: 20px; 
}

.year-marker { 
    top: 0; 
    z-index: 10; 
    font-size: 28px; 
    padding: 20px 15px 15px 20px; 
    margin: 25px 0 0 -20px;  
    border-radius: 0; 
    border-bottom: 1px solid rgba(0,0,0,0.03);
}

body.dark-mode .year-marker { 
    border-bottom: 1px solid rgba(255,255,255,0.03); 
}

.month-marker { 
    top: 68px; 
    z-index: 9; 
    font-size: 18px; 
    color: var(--date-color); 
    padding: 10px 15px 10px 20px; 
    margin: 0 0 20px -20px; 
    border-radius: 0 0 8px 8px;
}
/* 回忆视图时间轴吸附至面板顶部（规范尺寸，严密契合消除重叠遮挡） */
#memories-timeline .year-marker {
    top: 0 !important;
    z-index: 90;
    margin-top: 0 !important;
    padding: 16px 15px 12px 20px !important;
    font-size: 26px !important;
    line-height: 32px !important;
    box-sizing: border-box !important;
}

#memories-timeline .month-marker {
    top: 60px !important; /* 严格等于上方 year-marker 渲染高度 16 + 32 + 12 = 60px */
    z-index: 89;
    padding: 8px 15px 8px 20px !important;
    font-size: 16px !important;
    line-height: 24px !important;
    box-sizing: border-box !important;
}

#memories-timeline .timeline-item {
    scroll-margin-top: 55px; /* 独立滚动面板内的原生边界保护 */
}

/* ==========================================
   5. 日记卡片与高亮动画
========================================== */
.timeline-item { 
    position: relative; 
    margin-bottom: 25px; 
    padding-left: 20px; 
    z-index: 1; 
    width: 100%;
    box-sizing: border-box;
    scroll-margin-top: 180px; /* 原生滚动锚点安全边距保护 */
    user-select: none;
    -webkit-user-select: none;
}

.event-main,
.item-title,
.item-intro,
.otd-sub-title,
.otd-sub-intro {
    user-select: none;
    -webkit-user-select: none;
}

.timeline-item:last-child { 
    margin-bottom: 0; 
}

@keyframes highlightPulse {
    0% { background-color: rgba(255, 77, 79, 0.3); box-shadow: 0 0 20px rgba(255, 77, 79, 0.4); }
    30% { background-color: rgba(255, 77, 79, 0.2); box-shadow: 0 0 15px rgba(255, 77, 79, 0.3); }
    80% { background-color: rgba(255, 77, 79, 0.05); box-shadow: 0 0 5px rgba(255, 77, 79, 0.1); }
    100% { background-color: transparent; box-shadow: none; }
}

@keyframes timelineJumpArrival {
    0% { opacity: 0.72; transform: translate3d(0, 12px, 0) scale(0.995); }
    100% { opacity: 1; transform: translate3d(0, 0, 0) scale(1); }
}

.timeline-item.jump-arrival {
    animation: timelineJumpArrival 0.28s cubic-bezier(0.22, 0.8, 0.28, 1);
}

.timeline-item.highlight-flash {
    position: relative;
}

.timeline-item.highlight-flash::after {
    content: '';
    position: absolute;
    inset: -4px -8px;
    border-radius: 12px;
    pointer-events: none;
    animation: highlightPulse 4s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
    z-index: 0;
}

.event-icon {
    width: 10px; 
    height: 10px; 
    z-index: 2;
    flex-shrink: 0; 
    margin-top: 5px; 
}

.event-icon.red-dot { 
    border-radius: 50%; 
    background-color: #ff4d4f; 
}

.event-icon.triangle {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: center;
    transform: rotate(-90deg); 
    fill: #ff4d4f;
}

.timeline-item.expanded .event-icon.triangle {
    transform: rotate(0deg); 
}

.item-content { 
    display: flex; 
    align-items: flex-start; 
    gap: 15px; 
    width: 100%;
    box-sizing: border-box;
}

.item-date { 
    color: var(--date-color); 
    min-width: 54px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding-top: 11px !important;
    flex-shrink: 0;
    user-select: none;
}

.item-date-day {
    font-size: 14px;
    font-weight: 700;
    color: var(--title-color);
    line-height: 1.25;
    font-variant-numeric: tabular-nums;
}

.item-date-weekday {
    font-size: 11px;
    font-weight: 500;
    color: var(--date-color);
    line-height: 1.35;
    margin-top: 2px;
}

.item-title { 
    font-size: 16px; 
    color: var(--title-color); 
    transition: color 0.2s; 
    word-break: break-word; 
}

.photo-badge, .event-action-btn { 
    color: #0066cc; 
    transition: transform 0.2s; 
    font-size: 12px;
    cursor: pointer;
}

.photo-badge:hover, .event-action-btn:hover { 
    transform: scale(1.08); 
    color: #ff4d4f;
}

/* ==========================================
   6. 简介展开/收起动画
========================================== */
.intro-wrapper {
    display: grid;
    grid-template-rows: 0fr; 
    opacity: 0;              
    transition: grid-template-rows 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), 
                opacity 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.timeline-item.expanded .intro-wrapper {
    grid-template-rows: 1fr; 
    opacity: 1;              
}
/* 批量全部展开/收起时临时禁用过渡，消除数百张卡片同时重排引发的重绘闪烁与掉帧 */
.timeline.no-transition .intro-wrapper,
.timeline.no-transition .event-icon.triangle {
    transition: none !important;
}
.item-intro {
    overflow: hidden; 
    font-size: 14px; 
    color: var(--date-color); 
    line-height: 1.6; 
    white-space: pre-wrap; 
    word-break: break-all;
    overflow-wrap: anywhere;
    padding-top: 8px; 
}
.item-intro a.intro-link {
    color: #0066cc;
    text-decoration: underline;
    word-break: break-all;
    cursor: pointer;
    user-select: text;
    -webkit-user-select: text;
}

body.dark-mode .item-intro a.intro-link {
    color: #40a9ff;
}
/* 标题与那年今日简介强化换行 */
.item-title,
.otd-sub-title,
.otd-sub-intro {
    word-break: break-word;
    overflow-wrap: anywhere;
}

/* ==========================================
   7. 应用设置视图专属样式
========================================== */
.settings-card {
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    margin-top: 15px;
    box-sizing: border-box;
    width: 100%;
}

.settings-item-header {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.settings-item-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    font-weight: bold;
    color: var(--title-color);
}

.settings-item-desc {
    font-size: 13px;
    color: var(--date-color);
    line-height: 1.5;
}

.theme-switcher-modal {
    display: flex;
    gap: 10px;
    width: 100%;
}

.theme-switcher-modal .theme-btn {
    flex: 1;
    border: 1px solid var(--line-color);
    background: var(--bg-color);
    padding: 10px;
    border-radius: 10px;
    color: var(--text-color);
    font-size: 13px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.theme-switcher-modal .theme-btn.active {
    border-color: #ff4d4f;
    color: #ff4d4f;
    background: rgba(255, 77, 79, 0.1);
}

/* ==========================================
   8. 登录框
========================================== */
.login-container { 
    width: 100%; 
    max-width: 400px; 
    box-sizing: border-box; 
    text-align: center; 
    background: var(--mask-bg); 
    padding: 40px 30px; 
    margin: auto; 
    border-radius: 16px; 
    box-shadow: 0 10px 30px rgba(0,0,0,0.05); 
}

.login-container h2 { 
    margin-top: 0; 
    margin-bottom: 20px; 
    color: var(--title-color); 
    display: flex; 
    align-items: center; 
    justify-content: center; 
}

.login-container input { 
    width: 100%; 
    box-sizing: border-box; 
    margin-bottom: 15px; 
    padding: 12px; 
    border: 1px solid var(--line-color); 
    border-radius: 8px; 
    background: var(--bg-color); 
    color: var(--text-color); 
    font-size: 16px;
}

.login-container input:focus { 
    outline: none; 
    border-color: #0066cc; 
}

.login-btn { 
    width: 100%; 
    padding: 12px; 
    background-color: var(--text-color); 
    color: var(--bg-color); 
    border: none; 
    border-radius: 8px; 
    font-size: 16px; 
    font-weight: bold; 
    cursor: pointer; 
    transition: opacity 0.2s, transform 0.15s ease; 
}

.login-btn:hover { 
    opacity: 0.8; 
}

.login-btn:active {
    transform: scale(0.97);
    opacity: 0.75;
}

/* ==========================================
   9. 照片墙弹窗与反馈弹窗
========================================== */
.modal { 
    position: fixed; 
    z-index: 2000; 
    left: 0; 
    top: 0; 
    width: 100vw; 
    height: 100vh;
    height: 100dvh; 
    background-color: rgba(0, 0, 0, 0.96); 
    display: flex; 
    flex-direction: column; 
    justify-content: center; 
    align-items: center; 
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    overflow: hidden;
}

#photo-modal {
    z-index: 2650 !important;
}

body.scroll-locked {
    overflow: hidden;
}

.comment-modal-body,
.profile-edit-body,
.province-modal-body,
.birthday-picker-body,
.city-chips-grid,
.notice-list-container,
.report-box,
.contrib-box,
.memories-panel,
#sidebar-navs {
    overscroll-behavior: contain;
}

#modal-img-container { 
    position: relative;
    width: 100%; 
    height: 100%; 
    box-sizing: border-box;
    padding: 0 !important;
    overflow: hidden !important;
    pointer-events: auto;
}

#modal-slider-track {
    display: flex;
    align-items: center;
    width: 100%;
    height: 100%;
    gap: 20px;
    will-change: transform;
}

.modal-slide {
    flex: 0 0 100%;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    padding: 70px 80px;
    position: relative;
    user-select: none;
}

.modal-content { 
    max-width: 100%; 
    max-height: 100%; 
    width: auto;
    height: auto;
    object-fit: contain; 
    border-radius: 8px; 
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6); 
    user-select: none;
    -webkit-user-drag: none;
    will-change: transform; 
}

.close-modal { 
    position: absolute; 
    top: max(20px, calc(15px + env(safe-area-inset-top, 0px)));
    right: 25px; 
    color: #fff; 
    cursor: pointer; 
    z-index: 10; 
    transition: transform 0.15s ease, color 0.2s, background-color 0.2s; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    width: 44px; 
    height: 44px; 
    background: rgba(255,255,255,0.1); 
    border-radius: 50%;
}

.close-modal:hover { 
    transform: scale(1.08); 
    color: #ffffff; 
    background: rgba(255,255,255,0.22); 
}

.close-modal:active {
    transform: scale(0.92);
    color: #ffffff;
    background: rgba(255, 255, 255, 0.35);
}

.close-contrib {
    position: absolute; 
    top: 15px; 
    right: 15px; 
    color: var(--text-color); 
    cursor: pointer; 
    z-index: 10; 
    transition: transform 0.15s ease, color 0.2s, background-color 0.2s; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    width: 36px; 
    height: 36px; 
    background: rgba(0, 0, 0, 0.05); 
    border-radius: 50%;
}

body.dark-mode .close-contrib {
    background: rgba(255, 255, 255, 0.1);
}

/* 浅色模式反馈：保持经典红 */
.close-contrib:hover {
    transform: scale(1.08); 
    color: #ff4d4f; 
    background: rgba(255, 77, 79, 0.12);
}

.close-contrib:active {
    transform: scale(0.92); 
    color: #ff4d4f; 
    background: rgba(255, 77, 79, 0.2);
}

/* 暗色模式反馈：稍亮提亮展示点击 */
body.dark-mode .close-contrib:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.18);
}

body.dark-mode .close-contrib:active {
    transform: scale(0.92);
    color: #ffffff;
    background: rgba(255, 255, 255, 0.28);
}

.modal-download { 
    position: absolute; 
    top: max(20px, calc(15px + env(safe-area-inset-top, 0px)));
    left: 25px; 
    color: #fff; 
    text-decoration: none; 
    cursor: pointer; 
    transition: color 0.2s, transform 0.15s ease, background-color 0.2s; 
    z-index: 10; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    width: 44px; 
    height: 44px; 
    background: rgba(255,255,255,0.1); 
    border-radius: 50%;
}

.modal-download:hover { 
    color: #52c41a; 
    transform: scale(1.08); 
    background: rgba(255,255,255,0.22); 
}

.modal-download:active {
    transform: scale(0.92);
    background: rgba(255, 255, 255, 0.32);
}

.view-original-btn {
    position: absolute;
    bottom: 25px;
    left: 30px;
    z-index: 10;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: #ffffff;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    cursor: pointer;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 4px;
}

.view-original-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.view-original-btn:active:not(:disabled) {
    transform: scale(0.95);
    background: rgba(255, 255, 255, 0.38);
}

.view-original-btn.loaded {
    opacity: 0.6;
    cursor: default;
    background: rgba(255, 255, 255, 0.08);
}

.modal-nav { 
    position: absolute; 
    top: 50%; 
    transform: translateY(-50%); 
    background: rgba(255, 255, 255, 0.15); 
    color: white; 
    border: none; 
    font-size: 22px; 
    width: 40px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer; 
    border-radius: 8px;
    transition: all 0.15s ease; 
    z-index: 10; 
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.modal-nav:hover { 
    background: rgba(255, 255, 255, 0.3); 
    transform: translateY(-50%) scale(1.05); 
}

.modal-nav:active {
    transform: translateY(-50%) scale(0.94);
    background: rgba(255, 255, 255, 0.42);
}

.modal-nav.hidden { 
    display: none !important; 
}

.modal-nav.prev { 
    left: 20px; 
} 

.modal-nav.next { 
    right: 20px; 
}

#modal-caption { 
    position: absolute; 
    bottom: 25px; 
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.9); 
    font-size: 13px; 
    letter-spacing: 0.5px; 
    z-index: 30; 
    background: rgba(0, 0, 0, 0.6); 
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 6px 14px; 
    border-radius: 20px; 
    backdrop-filter: blur(8px); 
    -webkit-backdrop-filter: blur(8px);
    pointer-events: auto;
    cursor: pointer;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    user-select: none;
    -webkit-user-select: none;
    touch-action: manipulation; /* 消除移动端 300ms 点击延迟 */
    -webkit-tap-highlight-color: transparent;
    transition: all 0.2s ease;
}

#modal-caption:hover {
    background: rgba(0, 0, 0, 0.8);
    border-color: rgba(255, 255, 255, 0.45);
    transform: translateX(-50%) scale(1.05);
}

#modal-caption.active {
    background: rgba(0, 136, 204, 0.3);
    border-color: #0088cc;
    color: #40a9ff;
}

/* 缩略图面板：桌面端默认右侧垂直抽屉 (向左滑出展开，向右滑入收起) */
.modal-thumbs-drawer {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 240px;
    background: rgba(14, 14, 14, 0.88);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 25;
    display: flex !important; /* 维持布局常驻，避免 display:none 导致关闭无动画或展开重排卡顿 */
    flex-direction: column;
    box-sizing: border-box;
    transform: translate3d(0, 0, 0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: transform 0.28s cubic-bezier(0.25, 0.8, 0.25, 1), opacity 0.22s ease, visibility 0.28s ease;
    will-change: transform, opacity;
}

.modal-thumbs-drawer.hidden {
    display: flex !important;
    transform: translate3d(100%, 0, 0) !important;
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
}

.modal-thumbs-header {
    height: 56px;
    padding: 0 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    flex-shrink: 0;
}

.close-thumbs-btn {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.6);
    font-size: 22px;
    cursor: pointer;
    line-height: 1;
    padding: 2px 6px;
    border-radius: 4px;
    transition: color 0.2s ease, background-color 0.2s ease, transform 0.15s ease;
}

.close-thumbs-btn:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.15);
}

.close-thumbs-btn:active {
    transform: scale(0.92);
    color: #ffffff;
    background: rgba(255, 255, 255, 0.28);
}

.modal-thumbs-track {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 14px 12px 30px 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    -webkit-overflow-scrolling: touch;
}

.modal-thumbs-track::-webkit-scrollbar {
    width: 4px;
}

.modal-thumbs-track::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

.modal-thumb-item {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 3;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    opacity: 0.55;
    background: rgba(255, 255, 255, 0.05);
    flex-shrink: 0;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.modal-thumb-item:hover {
    opacity: 0.85;
}

.modal-thumb-item.active {
    opacity: 1;
    border-color: #0088cc;
    box-shadow: 0 0 12px rgba(0, 136, 204, 0.6);
    transform: scale(1.04);
}

.modal-thumb-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    user-select: none;
    -webkit-user-drag: none;
}
.zoom-controls { 
    position: absolute; 
    bottom: 25px; 
    right: 30px; 
    display: flex; 
    gap: 12px; 
    z-index: 10; 
}

.zoom-controls button {
    background: rgba(255, 255, 255, 0.15); 
    border: 1px solid rgba(255, 255, 255, 0.25); 
    color: white;
    border-radius: 50%; 
    width: 42px; 
    height: 42px; 
    cursor: pointer; 
    backdrop-filter: blur(5px);
    display: flex; 
    align-items: center; 
    justify-content: center; 
    transition: all 0.2s ease;
}

.zoom-controls button:hover { 
    background: rgba(255, 255, 255, 0.3); 
    transform: scale(1.08);
}

.contrib-box {
    background: var(--card-bg);
    width: 90%;
    max-width: 520px;
    padding: 30px;
    border-radius: 16px;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    color: var(--text-color);
    box-sizing: border-box;
    max-height: 85vh;
    overflow-y: auto;
}

.contrib-box label {
    font-size: 13px;
    font-weight: bold;
    color: var(--title-color);
    margin-bottom: 4px;
    display: block;
}

.contrib-box input, .contrib-box textarea, .contrib-box select {
    width: 100%;
    box-sizing: border-box;
    border: 1px solid var(--line-color);
    border-radius: 8px;
    padding: 8px 10px;
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 14px;
    outline: none;
    resize: none;
}

@media (max-width: 768px) {
    #modal-img-container {
        padding: 0 !important;
    }
    .modal-slide {
        padding: 60px 0 60px 0 !important;
    }

    .modal-nav,
    .zoom-controls,
    .desktop-only,
    .modal-hint-zone,
    .modal-zoom-hint {
        display: none !important;
    }

    .modal-download {
        top: max(20px, calc(12px + env(safe-area-inset-top, 0px)));
        left: 15px;
        width: 38px;
        height: 38px;
    }

    .close-modal {
        top: max(20px, calc(12px + env(safe-area-inset-top, 0px)));
        right: 15px;
        width: 38px;
        height: 38px;
    }

    .close-contrib {
        top: 12px;
        right: 12px;
        width: 32px;
        height: 32px;
    }

    #modal-caption {
        bottom: max(15px, calc(8px + env(safe-area-inset-bottom, 0px)));
        font-size: 12px;
        padding: 5px 12px;
    }

    /* 移动端/App：贴底横向滑动栏 (向上滑出展开，向下滑入收起) */
    .modal-thumbs-drawer {
        top: auto;
        left: 0;
        right: 0;
        bottom: max(56px, calc(48px + env(safe-area-inset-bottom, 0px)));
        width: 100%;
        height: 72px;
        border-left: none;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        background: rgba(12, 12, 12, 0.92);
        padding: 0;
        flex-direction: row;
        align-items: center;
        transform: translate3d(0, 0, 0);
        transition: transform 0.28s cubic-bezier(0.25, 0.8, 0.25, 1), opacity 0.22s ease, visibility 0.28s ease;
    }

    .modal-thumbs-drawer.hidden {
        display: flex !important;
        transform: translate3d(0, calc(100% + 75px), 0) !important;
        opacity: 0 !important;
        visibility: hidden !important;
        pointer-events: none !important;
    }

    .modal-thumbs-track {
        flex-direction: row;
        overflow-x: auto;
        overflow-y: hidden;
        padding: 8px 14px;
        gap: 8px;
        width: 100%;
        height: 100%;
        align-items: center;
        box-sizing: border-box;
    }

    .modal-thumbs-track::-webkit-scrollbar {
        display: none;
    }

    .modal-thumb-item {
        width: 52px;
        height: 52px;
        aspect-ratio: 1 / 1;
        border-radius: 6px;
    }

    .modal-thumb-img {
        object-fit: cover;
    }

    .view-original-btn {
        bottom: 15px;
        left: 15px;
        padding: 4px 10px;
        font-size: 12px;
    }
}

/* ==========================================
   10. 桌面端左侧导航栏
========================================== */
.sidebar { 
    position: fixed; 
    right: 28px; 
    left: auto; 
    top: 14%; 
    width: 240px; 
    display: flex; 
    flex-direction: column; 
    gap: 12px; 
    max-height: 78vh; 
    max-height: 78dvh; 
    box-sizing: border-box; 
    padding: 18px 17px; 
    z-index: 1001; 
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 8px;
    border-bottom: 1px dashed var(--line-color);
    flex-shrink: 0;
    width: 100%;
    box-sizing: border-box;
}

.sidebar-title {
    font-size: 15px;
    font-weight: bold;
    color: var(--title-color);
}

.close-sidebar-btn {
    display: none; /* 桌面端常驻，隐藏关闭按钮 */
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.05);
    border: none;
    color: var(--text-color);
    cursor: pointer;
    transition: transform 0.15s ease, color 0.2s, background-color 0.2s;
    padding: 0;
    flex-shrink: 0;
}

body.dark-mode .close-sidebar-btn {
    background: rgba(255, 255, 255, 0.1);
}

/* 浅色模式按压反馈：变红 */
.close-sidebar-btn:hover {
    color: #ff4d4f;
    background: rgba(255, 77, 79, 0.12);
}

.close-sidebar-btn:active {
    transform: scale(0.92);
    color: #ff4d4f;
    background: rgba(255, 77, 79, 0.22);
}

/* 暗色模式按压反馈：提亮 */
body.dark-mode .close-sidebar-btn:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.18);
}

body.dark-mode .close-sidebar-btn:active {
    transform: scale(0.92);
    color: #ffffff;
    background: rgba(255, 255, 255, 0.28);
}

#sidebar-navs::-webkit-scrollbar {
    width: 4px;
}
#sidebar-navs::-webkit-scrollbar-thumb {
    background: var(--line-color);
    border-radius: 4px;
}
#sidebar-navs::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar.hidden {
    display: none !important;
}

.sidebar a { 
    text-decoration: none; 
    color: var(--date-color); 
    transition: 0.2s; 
}

.sidebar a:hover { 
    color: #0066cc; 
    transform: translateX(5px); 
}

.sidebar-year { 
    font-weight: bold; 
    font-size: 18px; 
    color: var(--title-color) !important; 
    margin-top: 10px; 
}

.sidebar-month { 
    font-size: 14px; 
    padding-left: 15px; 
}

/* ==========================================
   11. 移动端响应式适配与安全区避让
========================================== */
/* 嵌入 Tab 栏右侧的圆形目录按钮 */
.mobile-menu-btn {
    position: relative !important;
    top: auto !important;
    right: auto !important;
    bottom: auto !important;
    left: auto !important;
    z-index: 1001 !important;
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    border-radius: 50%;
    width: 34px;
    height: 34px;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background-color 0.2s ease, border-color 0.2s ease;
    overflow: hidden;
}

.mobile-menu-btn.hidden {
    display: none !important;
}

body.dark-mode .mobile-menu-btn {
    background: var(--card-bg);
    color: #ffffff;
    border: 1px solid var(--line-color);
}

/* 侧边栏展开时隐藏外部页签右侧按钮，防止重叠透光 */
body.sidebar-open .mobile-menu-btn {
    opacity: 0 !important;
    pointer-events: none !important;
}

/* 侧边栏展开或软键盘弹出时隐藏底部导航栏 */
body.sidebar-open .bottom-nav-container,
body.keyboard-open .bottom-nav-container {
    transform: translateY(180%) !important;
    opacity: 0 !important;
    pointer-events: none !important;
    visibility: hidden !important;
}
body.sidebar-open .view-section.active {
    transform: none !important;
}
/* 双 SVG 图标定位与状态样式 */
.mobile-menu-btn svg {
    position: absolute;
    top: 50%;
    left: 50%;
}

/* 默认状态：显示三条杠 (☰)，隐藏退出键 (✕) */
.mobile-menu-btn .icon-menu {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1) rotate(0deg);
}

.mobile-menu-btn .icon-close {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.5) rotate(-90deg);
}

/* 展开态：三条杠隐去，退出键显现 */
.mobile-menu-btn.active .icon-menu {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.5) rotate(90deg);
}

.mobile-menu-btn.active .icon-close {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1) rotate(0deg);
}

.mobile-overlay { 
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%; 
    background-color: rgba(0, 0, 0, 0.4); 
    backdrop-filter: blur(5px); 
    -webkit-backdrop-filter: blur(5px); 
    z-index: 105 !important;
    opacity: 1; 
    transition: opacity 0.3s; 
}

.mobile-overlay.hidden { 
    opacity: 0; 
    pointer-events: none; 
}

@media (max-width: 1024px) {
    .close-sidebar-btn {
        display: flex !important; /* 竖屏紧凑态显示标题栏退出按键 */
    }

    .sidebar { 
        position: fixed; 
        top: 0; 
        bottom: 0;
        right: 0; 
        left: auto; 
        width: 72%; 
        max-width: 310px;
        height: 100vh; 
        height: 100dvh; 
        max-height: none;
        box-sizing: border-box; 
        background: var(--card-bg) !important; 
        border-left: 1px solid var(--line-color) !important;
        border-top: none !important;
        border-right: none !important;
        border-bottom: none !important;
        border-radius: 20px 0 0 20px !important;
        box-shadow: -8px 0 25px rgba(0, 0, 0, 0.1) !important;
        z-index: 110 !important;
        padding: max(48px, calc(20px + env(safe-area-inset-top, 0px))) 18px calc(30px + env(safe-area-inset-bottom, 0px)) 20px !important; 
        transform: translateX(105%); 
        transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.3s ease; 
        display: flex; 
        flex-direction: column; 
        gap: 12px;
    }

    body.dark-mode .sidebar {
        background: var(--card-bg) !important;
        border-left: 1px solid var(--line-color) !important;
        box-shadow: -8px 0 30px rgba(0, 0, 0, 0.5) !important;
    }
}

/* 平板横屏及宽屏桌面端（>= 1025px）：时间导航常驻右侧，右上角圆形目录按钮强制隐藏 */
@media (min-width: 1025px) {
    .mobile-menu-btn {
        display: none !important;
    }
    .mobile-overlay {
        display: none !important;
    }
}
    
.sidebar.open { 
    transform: translateX(0); 
    box-shadow: -5px 0 20px rgba(0,0,0,0.15); 
}


#main-content:has(#home-view.active) #sidebar,
#main-content:has(#album-view.active) #sidebar,
#main-content:has(#classmates-view.active) #sidebar,
#main-content:has(#settings-view.active) #sidebar,
#main-content:has(#interact-view.active) #sidebar,
#main-content:has(#memories-album-panel.active) #sidebar,
#main-content:has(#memories-classmates-panel.active) #sidebar,
body:has(#home-view.active) .sidebar,
body:has(#album-view.active) .sidebar,
body:has(#classmates-view.active) .sidebar,
body:has(#settings-view.active) .sidebar,
body:has(#interact-view.active) .sidebar,
body:has(#memories-album-panel.active) .sidebar,
body:has(#memories-classmates-panel.active) .sidebar,
body:has(#home-view.active) .mobile-menu-btn,
body:has(#album-view.active) .mobile-menu-btn,
body:has(#classmates-view.active) .mobile-menu-btn,
body:has(#settings-view.active) .mobile-menu-btn,
body:has(#interact-view.active) .mobile-menu-btn,
body:has(#memories-album-panel.active) .mobile-menu-btn,
body:has(#memories-classmates-panel.active) .mobile-menu-btn {
    display: none !important;
}

/* 非时间轴线内容时隐藏展开/收起按钮 */
body:has(#home-view.active) #toggle-expand-all,
body:has(#album-view.active) #toggle-expand-all,
body:has(#classmates-view.active) #toggle-expand-all,
body:has(#settings-view.active) #toggle-expand-all,
body:has(#interact-view.active) #toggle-expand-all,
body:has(#memories-album-panel.active) #toggle-expand-all,
body:has(#memories-classmates-panel.active) #toggle-expand-all {
    opacity: 0 !important;
    pointer-events: none !important;
    transform: translateY(20px) !important;
    -webkit-transform: translateY(20px) !important;
}

/* 首页、设置、人物卡片等不需要回顶按钮的页面隐藏回到顶部按钮 */
body:has(#home-view.active) #back-to-top,
body:has(#settings-view.active) #back-to-top,
body:has(#interact-view.active) #back-to-top,
body:has(#memories-classmates-panel.active) #back-to-top {
    opacity: 0 !important;
    pointer-events: none !important;
    transform: translateY(20px) !important;
    -webkit-transform: translateY(20px) !important;
}

@media (max-width: 768px) {
    body { padding: calc(15px + env(safe-area-inset-top, 0px)) 10px calc(90px + env(safe-area-inset-bottom, 0px)); } 
    .timeline { padding-left: 15px; }
    
    .header { 
        margin-top: 10px; 
        margin-bottom: 12px;
    }

    body.is-app .header {
        margin-top: 6px;
        margin-bottom: 10px;
    }
    .header h1 { 
        font-size: 24px; 
    }
    .header p {
        font-size: 14px;
    }
    
    .year-marker { 
        font-size: 24px; 
        top: 0; 
        margin-top: 20px; 
        margin-left: -15px; 
        padding: 20px 15px 15px 15px; 
        width: calc(100% + 15px); 
        border-radius: 0; 
        background: var(--bg-color); 
        z-index: 10; 
    }
    
    .month-marker { 
        font-size: 16px; 
        top: 64px; 
        margin-left: -15px; 
        padding: 10px 15px; 
        width: calc(100% + 15px); 
        z-index: 9; 
    }
    
    .item-title { font-size: 15px; line-height: 1.5; }
    .item-content { gap: 10px; } 
    .item-date { min-width: 40px; font-size: 13px; }
}

/* ==========================================
   12. 悬浮回顶与全部展开按钮
========================================== */
.fab {
    position: fixed; 
    right: 20px;
    z-index: 998;
    background: rgba(255, 255, 255, 0.85); 
    color: var(--text-color);
    border: 1px solid rgba(0, 0, 0, 0.08); 
    border-radius: 50%; 
    width: 44px; 
    height: 44px;
    box-sizing: border-box;
    display: flex; 
    align-items: center; 
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08); 
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    cursor: pointer;
    opacity: 0; 
    pointer-events: none;
    transform: translateY(20px);
    -webkit-transform: translateY(20px);
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform, opacity;
}

.fab:hover {
    transform: translateY(-2px);
    -webkit-transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
    color: #ff4d4f;
}

.fab:active {
    transform: scale(0.92) !important;
    background: rgba(125, 125, 125, 0.16);
}

body.dark-mode .fab {
    background: rgba(28, 28, 30, 0.85);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

body.dark-mode .fab:hover { color: #ff4d4f; }

body.dark-mode .fab:active {
    transform: scale(0.92) !important;
    background: rgba(255, 255, 255, 0.22);
}

.fab.visible { 
    opacity: 1; 
    pointer-events: auto;
    transform: translateY(0); 
    -webkit-transform: translateY(0);
}

/* 默认/移动端：两按钮上下对齐 */
#back-to-top {
    bottom: 85px;
}
#toggle-expand-all {
    bottom: 139px; /* 85px + 按钮高度44px + 间距10px */
}

/* 竖屏紧凑态（手机 & 平板竖屏 <= 1024px）统一贴边距离 */
@media (max-width: 1024px) {
    .fab {
        right: 15px !important;
    }
}

/* ==========================================
   13. 底部通栏导航栏与居中粉色加号按钮
========================================== */
.view-section { 
    display: none; 
    width: 100%; 
    max-width: 1000px; 
    margin: 0 auto; 
    box-sizing: border-box;
}

.view-section.active { 
    display: block; 
}

.bottom-nav-container {
    display: flex; 
    width: 100%;
    position: fixed; 
    bottom: 0; 
    left: 0; 
    right: 0; 
    z-index: 1050; 
    pointer-events: none; 
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.4s ease; 
    transform: translate3d(0, 0, 0);
    -webkit-transform: translate3d(0, 0, 0); /* 开启独立硬件加速图层，与页面内容滚动渲染完全隔离 */
}

.bottom-nav-container.nav-hidden {
    transform: translateY(180%);
    opacity: 0;
}

.bottom-nav {
    pointer-events: auto; 
    display: flex; 
    width: 100%;
    justify-content: space-around;
    padding: 6px 10px calc(6px + env(safe-area-inset-bottom, 0px)) 10px; 
    border-radius: 0;
    background: rgba(255, 255, 255, 0.92); 
    backdrop-filter: blur(18px); 
    -webkit-backdrop-filter: blur(18px);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    border-left: none;
    border-right: none;
    border-bottom: none;
    align-items: center;
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    box-sizing: border-box;
}

body.dark-mode .bottom-nav { 
    background: rgba(28, 28, 30, 0.92); 
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.3); 
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.bottom-nav .nav-item { 
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 6px 0;
    border-radius: 12px;
    color: #888888; 
    font-weight: 500; 
    cursor: pointer; 
    text-decoration: none; 
    font-size: 11px; 
    gap: 3px;
    transition: all 0.25s cubic-bezier(0.25, 0.8, 0.25, 1); 
    user-select: none; 
    -webkit-tap-highlight-color: transparent; 
}

.bottom-nav .nav-item:hover { color: #111111; }
.bottom-nav .nav-item:active { transform: scale(0.94); }

body.dark-mode .bottom-nav .nav-item { color: #888888; }
body.dark-mode .bottom-nav .nav-item:hover { color: #cccccc; }

.bottom-nav .nav-item.active { 
    color: #ff4d4f !important; 
    font-weight: bold;
}

/* 底部中央加号（反馈）按钮样式 */
.bottom-nav .nav-plus-btn {
    padding: 0 4px;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.plus-icon-wrapper {
    width: 42px;
    height: 42px;
    border-radius: 14px; /* 圆角矩形 Squircle 样式 */
    background: linear-gradient(135deg, #ff5388, #ff2a6d); /* 鲜艳粉色渐变 */
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(255, 42, 109, 0.35);
    transform: none; /* 与左右两侧 Tab 保持同一水平线完美居中 */
    transition: transform 0.25s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.25s ease;
}

.bottom-nav .nav-plus-btn:hover .plus-icon-wrapper {
    transform: scale(1.06);
    box-shadow: 0 6px 16px rgba(255, 42, 109, 0.5);
}

.bottom-nav .nav-plus-btn:active .plus-icon-wrapper {
    transform: scale(0.92) !important;
    box-shadow: 0 2px 8px rgba(255, 42, 109, 0.3);
}
/* ==========================================
   14. 首页布局
========================================== */
#home-view {
    width: 100%;
    max-width: 1000px; 
    box-sizing: border-box;
}

.otd-stats-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.stat-badge {
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 20px;
    background: rgba(125, 125, 125, 0.1);
    color: var(--date-color);
    border: 1px solid var(--line-color);
}

.otd-date-stepper {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-top: 18px;
    background: var(--mask-bg);
    padding: 6px 16px;
    border-radius: 30px;
    border: 1px solid var(--line-color);
}

.stepper-btn {
    background: none;
    border: none;
    color: var(--title-color);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    transition: background 0.2s ease, color 0.2s ease;
}

.stepper-btn:hover { color: #ff4d4f; }
.stepper-btn:active { transform: scale(0.94); }

.stepper-date {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 15px;
    font-weight: 700;
    color: var(--title-color);
}

.today-tag {
    font-size: 10px;
    background: #ff4d4f;
    color: #fff;
    padding: 1px 6px;
    border-radius: 10px;
}

.stepper-reset {
    background: none;
    border: none;
    font-size: 12px;
    color: #ff4d4f;
    cursor: pointer;
    text-decoration: underline;
}

.otd-container {
    display: flex;
    flex-direction: column;
    align-items: stretch; 
    width: 100%;
    box-sizing: border-box;
    gap: 20px;
    margin-top: 25px;
    padding-bottom: 20px;
}

.otd-card { 
    width: 100% !important;
    min-width: 100%;
    box-sizing: border-box;
    background: var(--card-bg) !important; 
    border-radius: 16px; 
    overflow: hidden; 
    box-shadow: 0 4px 20px rgba(0,0,0,0.04); 
    border: 1px solid var(--line-color); 
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.3s ease; 
    display: flex;
    flex-direction: column;
    align-self: stretch;
}

body.dark-mode .otd-card { 
    background: #222222 !important; 
    border-color: #333; 
}

.otd-card:hover { 
    transform: translateY(-4px); 
    box-shadow: 0 12px 30px rgba(0,0,0,0.08); 
}

.otd-img-wrapper { 
    position: relative; 
    width: 100%; 
    max-height: 380px; 
    overflow: hidden; 
    background: #000; 
}

.otd-image { 
    width: 100%; 
    height: 100%; 
    object-fit: cover; 
    display: block; 
    opacity: 0.9; 
    transition: opacity 0.3s, transform 0.5s ease; 
}

.otd-image:hover { opacity: 1; transform: scale(1.02); }

.photo-badge-count { 
    position: absolute; 
    bottom: 12px; 
    right: 12px; 
    background: rgba(0,0,0,0.55); 
    color: #fff; 
    backdrop-filter: blur(8px); 
    -webkit-backdrop-filter: blur(8px);
    padding: 4px 12px; 
    border-radius: 20px; 
    font-size: 12px; 
    font-weight: 600; 
    pointer-events: none; 
    border: 1px solid rgba(255,255,255,0.15); 
}

.otd-content { 
    padding: 20px 25px 12px 25px; 
    flex: 1;
    width: 100%;
    box-sizing: border-box;
}

.otd-year { 
    display: inline-flex;
    align-items: center; 
    font-size: 20px; 
    font-weight: 800; 
    color: var(--title-color); 
    margin-bottom: 14px; 
    padding-left: 10px;
    border-left: 3px solid #ff4d4f;
    line-height: 1.2; 
}

.otd-sub-event { 
    width: 100%;
    box-sizing: border-box;
    margin-bottom: 14px; 
    padding: 6px;
    border-radius: 8px;
    transition: background 0.2s ease;
}

.otd-sub-event:last-child { margin-bottom: 0; }
.otd-sub-title { font-size: 16px; color: var(--title-color); font-weight: bold; word-break: break-word; }
.otd-sub-intro { font-size: 14px; color: var(--date-color); margin-top: 4px; line-height: 1.5; word-break: break-word; }

.otd-empty-state, .empty-placeholder-card {
    width: 100%;
    box-sizing: border-box;
    text-align: center;
    padding: 60px 20px;
    background: var(--mask-bg);
    border-radius: 16px;
    border: 1px dashed var(--line-color);
}

/* ==========================================
   15. 首页热力图（53 周连续网格重构）
========================================== */
.heatmap-wrapper {
    margin-top: 20px;
    margin-bottom: 30px;
    background: var(--mask-bg);
    border: 1px solid var(--line-color);
    border-radius: 16px;
    padding: 18px 22px 16px 22px;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}

.heatmap-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 15px;
    font-weight: 700;
    color: var(--title-color);
    margin-bottom: 14px;
    gap: 12px;
    flex-wrap: wrap;
}

.heatmap-legend {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    font-weight: 500;
    color: var(--date-color);
    user-select: none;
    padding: 3px 8px;
    border-radius: 12px;
    background: rgba(125, 125, 125, 0.06);
    border: 1px solid var(--line-color);
}

.legend-text {
    line-height: 1;
    padding: 0 1px;
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 2px;
    background: rgba(150, 150, 150, 0.18);
    box-sizing: border-box;
    flex-shrink: 0;
    display: inline-block;
}

.legend-dot.level-1 { background: #ffccc7; }
.legend-dot.level-2 { background: #ff7875; }
.legend-dot.level-3 { background: #ff4d4f; }
.legend-dot.level-4 { background: #cf1322; }
.legend-dot.level-5 { background: #820014; }

body.dark-mode .legend-dot {
    background: rgba(255, 255, 255, 0.12);
}
body.dark-mode .legend-dot.level-1 { background: #5c0011; }
body.dark-mode .legend-dot.level-2 { background: #820014; }
body.dark-mode .legend-dot.level-3 { background: #a8071a; }
body.dark-mode .legend-dot.level-4 { background: #ff4d4f; }
body.dark-mode .legend-dot.level-5 { background: #ff7875; }

.heatmap-hint, 
.admin-sub-card p, 
.status-msg-text, 
.status-msg { 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif !important;
    font-size: 13px !important;
    font-weight: normal !important; 
    color: var(--date-color) !important; 
    line-height: 1.5 !important;
}

/* GitHub 贡献图风格：连续 53 周横向排布容器 */
.heatmap-scroll-area {
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 6px;
    position: relative;
    display: flex;
}

.heatmap-body {
    display: flex;
    align-items: flex-start;
    min-width: max-content;
    margin: 0 auto;
    padding: 0 4px;
}

.heatmap-weekdays {
    display: grid;
    grid-template-rows: repeat(7, 13px);
    gap: 3px;
    margin-top: 22px; /* 16px month row + 6px gap */
    padding-right: 8px;
    position: sticky;
    left: 0;
    background: var(--bg-color);
    z-index: 5;
    flex-shrink: 0;
}

.weekday-label {
    font-size: 11px;
    color: var(--date-color);
    line-height: 13px;
    height: 13px;
    text-align: right;
    display: block;
    user-select: none;
    white-space: nowrap;
}

.heatmap-chart-body {
    display: flex;
    flex-direction: column;
}

.heatmap-months-row {
    position: relative;
    height: 16px;
    margin-bottom: 6px;
    width: 845px;
}

.heatmap-month-label {
    position: absolute;
    top: 0;
    font-size: 11px;
    color: var(--date-color);
    font-weight: 600;
    line-height: 16px;
    user-select: none;
    white-space: nowrap;
}

.heatmap-days-grid {
    display: grid;
    grid-template-rows: repeat(7, 13px);
    grid-auto-flow: column;
    grid-auto-columns: 13px;
    gap: 3px;
    width: 845px;
}

.dot {
    width: 13px !important; /* 维持原版 13px 真实尺寸，不缩水 */
    height: 13px !important;
    min-width: 13px !important;
    min-height: 13px !important;
    max-width: 13px !important;
    max-height: 13px !important;
    border-radius: 3px;
    background: rgba(150, 150, 150, 0.15);
    cursor: pointer;
    transition: transform 0.18s cubic-bezier(0.175, 0.885, 0.32, 1.275), background 0.18s ease;
    flex-shrink: 0;
    box-sizing: border-box;
    touch-action: manipulation;
}

.dot.empty-placeholder { 
    visibility: hidden; 
    pointer-events: none; 
    cursor: default; 
}

.dot:hover:not(.empty-placeholder) { 
    transform: scale(1.35); 
    z-index: 5; 
}

.dot:active:not(.empty-placeholder) { 
    transform: scale(1.15); 
}

.dot.level-1 { background: #ffccc7; }
.dot.level-2 { background: #ff7875; }
.dot.level-3 { background: #ff4d4f; }
.dot.level-4 { background: #cf1322; }
.dot.level-5 { background: #820014; }

body.dark-mode .dot.level-1 { background: #5c0011; }
body.dark-mode .dot.level-2 { background: #820014; }
body.dark-mode .dot.level-3 { background: #a8071a; }
body.dark-mode .dot.level-4 { background: #ff4d4f; }
body.dark-mode .dot.level-5 { background: #ff7875; }

.dot.selected { 
    outline: 2px solid var(--title-color); 
    outline-offset: 1px; 
}

/* ==========================================
   16. 表情气泡弹窗与表态按键
========================================== */
.emoji-font-override,
.emoji-code-input,
.tg-emoji-item,
.reaction-btn .emoji,
.emoji-tag {
    font-family: 'Noto Color Emoji', 'Apple Color Emoji', 'Segoe UI Emoji', sans-serif !important;
}

.tg-reaction-picker {
    position: fixed;
    z-index: 3000;
    max-width: 90vw;
    animation: tgPopIn 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes tgPopIn {
    0% { opacity: 0; transform: scale(0.7) translateY(10px); }
    100% { opacity: 1; transform: scale(1) translateY(0); }
}

.tg-picker-bubble {
    display: grid;
    grid-template-rows: repeat(2, auto);
    grid-auto-flow: row;
    gap: 6px;
    padding: 10px 12px;
    border-radius: 16px;
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
    width: max-content; 
    max-width: calc(100vw - 30px); 
    box-sizing: border-box;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
.tg-picker-bubble::-webkit-scrollbar {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
}

body.dark-mode .tg-picker-bubble {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.tg-emoji-item {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    padding: 4px;
    border-radius: 50%;
    transition: transform 0.2s ease, background 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    flex-shrink: 0;
}

.tg-emoji-item:hover { transform: scale(1.35); }
.tg-emoji-item.selected { background: rgba(255, 77, 79, 0.2); transform: scale(1.15); }

.card-reactions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
    width: 100%;
    box-sizing: border-box;
}

.card-reactions.empty { display: none !important; }

.reaction-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 16px;
    border: 1px solid var(--line-color);
    background: var(--card-bg);
    color: var(--date-color);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
    flex-shrink: 0;
}

.reaction-btn:hover { border-color: #ff4d4f; transform: translateY(-1px); }
.reaction-btn:active { transform: scale(0.92); }

.reaction-btn.active {
    border-color: #ff4d4f;
    background: rgba(255, 77, 79, 0.12);
    color: #ff4d4f;
    font-weight: 600;
}

body.dark-mode .reaction-btn.active {
    background: rgba(255, 77, 79, 0.25);
    color: #ff7875;
}

.reaction-btn .emoji { font-size: 13px; }
.reaction-btn .count { font-size: 11px; }

/* GitHub Issue 风格表情添加按钮 */
.reaction-add-btn {
    padding: 3px 8px !important;
    color: var(--date-color);
}

.reaction-add-btn svg {
    display: block;
}

.reaction-add-btn:hover {
    color: var(--title-color) !important;
    border-color: var(--title-color) !important;
    background: rgba(125, 125, 125, 0.08) !important;
    transform: translateY(-1px);
}

.reaction-add-btn:active {
    transform: scale(0.92) !important;
}

body.dark-mode .reaction-add-btn:hover {
    color: #ffffff !important;
    border-color: rgba(255, 255, 255, 0.35) !important;
    background: rgba(255, 255, 255, 0.08) !important;
}

/* ==========================================
   17. 搜索框与动效
========================================== */
.search-wrapper {
    position: relative;
    width: 100%;
    min-height: 60px;
    z-index: 100;
    margin-top: 10px;
    margin-bottom: 30px;
}

.search-box { 
    position: relative; 
    width: 100%; 
    max-width: 500px; 
    margin-left: auto; 
    margin-right: auto; 
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    z-index: 100;
}

.search-box svg { 
    position: absolute; 
    left: 15px; 
    top: 50%; 
    transform: translateY(-50%); 
    color: var(--date-color); 
    z-index: 2; 
    transition: all 0.3s; 
}

.search-box input { 
    width: 100%; 
    padding: 12px 68px 12px 42px; 
    border: 1px solid var(--line-color); 
    border-radius: 25px; 
    background: var(--mask-bg); 
    backdrop-filter: blur(10px); 
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-color); 
    font-size: 15px; 
    box-sizing: border-box; 
    outline: none; 
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(0,0,0,0.02);
}

.search-box input:focus { 
    border-color: #0066cc; 
    box-shadow: 0 4px 20px rgba(0,102,204,0.1); 
}

@media (min-width: 769px) {
    .search-box.floating-right {
        position: fixed;
        top: 25px;
        right: 35px;
        width: 240px; 
        max-width: none;
        margin: 0;
        transform: none !important;
        z-index: 1200; 
    }
    
    .search-box.floating-right input {
        background: var(--mask-bg);
        box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    }
}

@media (max-width: 768px) {
    .search-wrapper { margin-top: 0; margin-bottom: 0; min-height: auto; } 
    .search-box {
        position: sticky;
        top: 0;
        margin: 0 -10px 20px -10px; 
        padding: 10px 15px; 
        width: auto;
        max-width: none;
        background: var(--mask-bg); 
        backdrop-filter: blur(15px);
        -webkit-backdrop-filter: blur(15px);
        border-bottom: 1px solid rgba(0,0,0,0.05);
    }
    body.dark-mode .search-box { border-bottom: 1px solid rgba(255,255,255,0.05); }
    .search-box svg { left: 28px; top: 50%; transform: translateY(-50%); }
    .search-box input {
        background: rgba(128, 128, 128, 0.08); 
        backdrop-filter: none; 
        -webkit-backdrop-filter: none; 
        box-shadow: none;
    }
}

@keyframes fadeOutUpUI {
    to { opacity: 0; transform: translateY(-20px); visibility: hidden; }
}

.login-container.fade-out { animation: fadeOutUpUI 0.3s ease forwards; }

#main-content > .sidebar { animation: justFadeIn 0.6s ease forwards; }

@keyframes justFadeIn { 0% { opacity: 0; } 100% { opacity: 1; } }

@keyframes themeIconPop {
    0% { transform: scale(0.8) rotate(-15deg); }
    50% { transform: scale(1.15) rotate(5deg); }
    100% { transform: scale(1) rotate(0deg); }
}

.theme-btn.active svg {
    animation: themeIconPop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

/* 搜索框内一键快速清空按钮 */
.search-clear-btn {
    background: none;
    border: none;
    color: var(--date-color);
    font-size: 18px;
    cursor: pointer;
    padding: 0 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    transition: color 0.2s ease, transform 0.2s ease;
    flex-shrink: 0;
    user-select: none;
}
.search-clear-btn:hover {
    color: var(--title-color);
    transform: scale(1.15);
}
.search-box .search-clear-btn {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
}
.search-box .search-clear-btn:hover {
    transform: translateY(-50%) scale(1.15);
}

/* 搜索栏筛选按钮 */
.search-filter-btn {
    background: none;
    border: none;
    color: var(--date-color);
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    transition: color 0.2s ease, transform 0.2s ease;
    flex-shrink: 0;
    user-select: none;
    line-height: 1;
}

.search-filter-btn:hover {
    color: var(--title-color);
    transform: scale(1.12);
}

.search-filter-btn.active {
    color: #ff4d4f;
}

body.dark-mode .search-filter-btn.active {
    color: #40a9ff;
}

.search-box .search-filter-btn {
    position: absolute;
    right: 38px;
    top: 50%;
    transform: translateY(-50%);
}

.search-box .search-filter-btn:hover {
    transform: translateY(-50%) scale(1.12);
}

/* 搜索范围筛选浮层菜单 */
.search-filter-dropdown {
    position: fixed;
    z-index: 3600;
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    border-radius: 12px;
    padding: 6px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 110px;
    box-sizing: border-box;
    animation: commentPopIn 0.2s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

body.dark-mode .search-filter-dropdown {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
}

.search-filter-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    font-size: 13px;
    color: var(--text-color);
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease;
    user-select: none;
}

.search-filter-item:hover {
    background: rgba(125, 125, 125, 0.1);
}

.search-filter-item.active {
    color: #ff4d4f;
    font-weight: 600;
}

body.dark-mode .search-filter-item.active {
    color: #40a9ff;
}

.search-filter-item .check-icon {
    display: none;
    flex-shrink: 0;
}

.search-filter-item.active .check-icon {
    display: block;
}

/* 关键词搜索高亮（亮色粉红，暗色亮蓝） */
.search-keyword-highlight {
    color: #ff4d4f;
    font-weight: 700;
}

body.dark-mode .search-keyword-highlight {
    color: #40a9ff;
}

/* 搜索结果底栏“跳转到事件” */
.search-jump-bar {
    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
    width: 100% !important;
    box-sizing: border-box !important;
    margin-top: 10px;
    padding-top: 8px;
    border-top: 1px dashed var(--line-color);
    color: var(--date-color);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    user-select: none;
    transition: opacity 0.2s, color 0.2s;
}

.search-jump-bar:hover {
    opacity: 0.85;
    color: var(--title-color);
}

body.dark-mode .search-jump-bar {
    color: var(--date-color);
}

body.dark-mode .search-jump-bar:hover {
    color: var(--title-color);
}

.search-jump-content {
    display: flex;
    align-items: center;
    gap: 6px;
}
/* ==========================================
   18. 后台表单与控制组件样式
========================================== */
.admin-form-container {
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    margin-top: 15px;
    box-sizing: border-box;
    width: 100%;
}

.form-row {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
    margin-bottom: 15px;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--title-color);
}

.form-group input, 
.form-group textarea {
    padding: 10px 12px;
    border: 1px solid var(--line-color);
    border-radius: 8px;
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 14px;
    font-family: inherit; 
    box-sizing: border-box;
    outline: none;
    transition: border-color 0.2s;
    width: 100%;
}

.form-group input:focus, 
.form-group textarea:focus {
    border-color: #0066cc;
}

.event-block {
    position: relative;
    background: var(--mask-bg);
    border: 1px solid var(--line-color);
    border-radius: 12px;
    padding: 18px 20px 15px 20px;
    margin-bottom: 15px;
    box-sizing: border-box;
}

.remove-block-btn {
    position: absolute;
    top: 10px;
    right: 12px;
    background: none;
    border: none;
    font-size: 20px;
    color: var(--date-color);
    cursor: pointer;
    line-height: 1;
    padding: 4px;
    border-radius: 4px;
    transition: color 0.2s, background 0.2s;
}

.remove-block-btn:hover {
    color: #ff4d4f;
    background: rgba(255, 77, 79, 0.1);
}

.edit-mode-banner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(250, 140, 22, 0.1);
    border: 1px solid #fa8c16;
    color: #fa8c16;
    padding: 12px 18px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.edit-actions {
    display: flex;
    gap: 10px;
}

.submit-btn {
    width: 100%;
    padding: 12px;
    background-color: #0066cc;
    color: #ffffff;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: opacity 0.2s, background-color 0.2s, transform 0.15s ease;
    box-sizing: border-box;
}

.submit-btn:hover { opacity: 0.9; }
.submit-btn:active { transform: scale(0.97); opacity: 0.85; }

.btn-dashed {
    background: transparent;
    border: 1px dashed var(--line-color);
    color: var(--text-color);
    margin-bottom: 20px;
    transition: all 0.2s;
}

.btn-dashed:hover {
    border-color: #0066cc;
    color: #0066cc;
}
.btn-dashed:active { transform: scale(0.98); background: rgba(0, 102, 204, 0.06); }

.btn-outline {
    background: transparent;
    border: 1px solid var(--line-color);
    color: var(--text-color);
    border-radius: 6px;
    padding: 6px 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-outline:hover {
    border-color: var(--text-color);
}
.btn-outline:active { transform: scale(0.96); background: rgba(125, 125, 125, 0.12); }

.btn-danger {
    background: #ff4d4f;
    color: #ffffff;
    border: none;
    border-radius: 6px;
    padding: 6px 14px;
    cursor: pointer;
    font-size: 13px;
    transition: opacity 0.2s, transform 0.15s ease;
}

.btn-danger:hover { opacity: 0.85; }
.btn-danger:active { transform: scale(0.96); opacity: 0.8; }
.btn-danger-small:active { transform: scale(0.95); opacity: 0.8; }
.btn-success { background: #52c41a; color: #fff; }
.btn-purple { background: #722ed1; color: #fff; }

.admin-overview {
    margin-top: 35px;
    padding-top: 25px;
    border-top: 1px dashed var(--line-color);
}

.admin-overview h3 {
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--title-color);
}

.admin-action-row {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.admin-action-row .submit-btn {
    flex: 1;
    min-width: 120px;
}

/* 后台图片清理：自定义多选卡片与工具栏 */
.cleanup-preview-grid {
    background: rgba(0, 0, 0, 0.03);
    padding: 10px;
    border-radius: 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    overflow-y: auto;
    max-height: 240px;
    border: 1px solid var(--line-color);
    box-sizing: border-box;
}

body.dark-mode .cleanup-preview-grid {
    background: rgba(255, 255, 255, 0.03);
}

.cleanup-thumb-card {
    position: relative;
    width: 76px;
    height: 76px;
    border-radius: 8px;
    border: 2px solid var(--line-color);
    overflow: hidden;
    cursor: pointer;
    box-sizing: border-box;
    transition: transform 0.15s ease, border-color 0.15s ease;
    background: var(--card-bg);
}

.cleanup-thumb-card:hover {
    transform: scale(1.04);
}

.cleanup-thumb-card.selected {
    border-color: #ff4d4f;
}

.cleanup-img-check {
    position: absolute;
    top: 4px;
    left: 4px;
    z-index: 3;
    width: 16px;
    height: 16px;
    cursor: pointer;
    margin: 0;
}

.cleanup-preview-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.cleanup-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 10px;
    padding-top: 8px;
    border-top: 1px dashed var(--line-color);
}

.admin-list-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: 400px;
    overflow-y: auto;
}

.admin-list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--mask-bg);
    border: 1px solid var(--line-color);
    border-radius: 10px;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}

.admin-list-item:hover {
    border-color: #0066cc;
    background: var(--card-bg);
}

.item-date-text {
    font-size: 13px;
    color: var(--date-color);
    width: 90px;
    flex-shrink: 0;
}

.item-title-text {
    flex: 1;
    font-size: 14px;
    color: var(--title-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: 0 10px;
}

.item-edit-btn {
    font-size: 12px;
    color: #0066cc;
    display: flex;
    align-items: center;
    gap: 4px;
}

.sub-review-card {
    background: var(--mask-bg);
    border: 1px solid var(--line-color);
    border-radius: 10px;
    padding: 12px 15px;
    margin-bottom: 10px;
}

.sub-card-tag {
    font-size: 11px;
    padding: 2px 6px;
    border-radius: 10px;
    color: #fff;
    margin-right: 6px;
}
.sub-card-tag.new_event { background: #52c41a; }
.sub-card-tag.supplement { background: #1890ff; }
.sub-card-tag.error_report { background: #fa8c16; }

.sub-edit-form {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--line-color);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.sub-edit-form .form-row {
    margin-bottom: 0;
}

.sub-edit-form input, 
.sub-edit-form textarea, 
.sub-edit-form select {
    padding: 6px 10px;
    border: 1px solid var(--line-color);
    border-radius: 6px;
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 13px;
    width: 100%;
    box-sizing: border-box;
}

/* ==========================================
   19. 后台表情与回应追踪滚动框限制
========================================== */
.admin-sub-card {
    background: var(--mask-bg);
    border: 1px solid var(--line-color);
    border-radius: 12px;
    padding: 20px;
    box-sizing: border-box;
    width: 100%;
}

.card-title-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--title-color);
    font-size: 15px;
}

.emoji-config-grid {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
}

.emoji-edit-row {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    box-sizing: border-box;
}

@media (max-width: 600px) {
    .emoji-edit-row {
        flex-wrap: wrap;
        gap: 8px;
        background: var(--bg-color);
        padding: 10px;
        border-radius: 8px;
        border: 1px solid var(--line-color);
    }
    .emoji-code-input {
        width: 50px;
        min-width: 50px;
    }
    .emoji-key-input {
        flex: 1;
        min-width: 100px;
    }
    .emoji-label-input {
        flex: 1 1 100%;
    }
}

.emoji-edit-row input {
    padding: 8px 12px;
    border: 1px solid var(--line-color);
    border-radius: 8px;
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 14px;
    box-sizing: border-box;
}

.emoji-code-input {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 60px;
    height: 38px;
    padding: 0 8px;
    background-color: var(--bg-color, #ffffff);
    border: 1px solid var(--line-color, #dcdfe6);
    border-radius: 8px;
    font-size: 20px;
    text-align: center;
    box-sizing: border-box;
    outline: none;
    cursor: text;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.emoji-code-input:focus {
    border-color: var(--primary-color, #409eff);
    box-shadow: 0 0 0 2px rgba(64, 158, 255, 0.2);
}

.emoji-code-input:empty::before {
    content: "😃";
    opacity: 0.4;
}
.emoji-key-input { width: 130px; flex-shrink: 0; }
.emoji-label-input { flex: 1; min-width: 80px; }

.btn-danger-icon {
    background: none;
    border: none;
    color: #ff4d4f;
    font-size: 16px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background 0.2s;
    flex-shrink: 0;
}

.btn-danger-icon:hover { background: rgba(255, 77, 79, 0.1); }

.reaction-table-wrapper {
    width: 100%;
    max-height: 380px;
    overflow-y: auto;
    overflow-x: hidden;
    margin-top: 15px;
    border: 1px solid var(--line-color);
    border-radius: 8px;
}

.admin-table {
    width: 100%;
    min-width: 0;
    table-layout: fixed;
    border-collapse: collapse;
    text-align: left;
    font-size: 13px;
}

.admin-table th, .admin-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--line-color);
    color: var(--text-color);
}

.admin-table th {
    background: var(--card-bg);
    color: var(--title-color);
    font-weight: bold;
    position: sticky;
    top: 0;
    z-index: 2;
}

body.dark-mode .admin-table th { background: var(--card-bg); }

.code-badge {
    background: rgba(0, 0, 0, 0.06);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 12px;
}

body.dark-mode .code-badge { background: rgba(255, 255, 255, 0.1); }

.emoji-tag {
    font-size: 16px;
    background: rgba(255, 77, 79, 0.1);
    padding: 2px 8px;
    border-radius: 12px;
    display: inline-block;
}

.table-preview-cell {
    max-width: 100px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--date-color);
}

.btn-danger-small {
    background: #ff4d4f;
    color: #fff;
    border: none;
    padding: 3px 10px;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn-danger-small:hover { opacity: 0.85; }

.cleanup-preview-img:hover, .sub-preview-img:hover {
    transform: scale(1.08) !important;
}

/* 后台事件编辑：配图缩略图网格与拖拽排序 */
.photo-preview-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 8px;
    margin-bottom: 8px;
}

.admin-thumb-item {
    position: relative;
    width: 65px;
    height: 65px;
    border-radius: 8px;
    border: 1px solid var(--line-color);
    background: var(--bg-color);
    cursor: grab;
    user-select: none;
    flex-shrink: 0;
    transition: transform 0.15s ease, border-color 0.15s ease;
}

.admin-thumb-item:active { cursor: grabbing; }
.admin-thumb-item.dragging { opacity: 0.4; }
.admin-thumb-item.drag-over { border: 2px dashed #0066cc; transform: scale(1.05); }

.admin-thumb-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 7px;
    display: block;
}

.admin-thumb-del {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 20px;
    height: 20px;
    background: #ff4d4f;
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    z-index: 5;
    transition: transform 0.15s ease, background-color 0.15s ease;
}

.admin-thumb-del:hover {
    transform: scale(1.2);
    background: #ff7875;
}

/* ==========================================
   20. 班级相册与加载屏
========================================== */
#album-view {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    box-sizing: border-box;
}

.album-loading-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    min-height: 280px;
    box-sizing: border-box;
    padding: 40px 0;
}

.album-loading-screen p {
    margin: 15px 0 0 0;
    text-align: center;
}

.photo-wall {
    display: flex;
    flex-direction: column;
    gap: 26px;
    width: 100%;
    max-width: 1000px;
    margin-top: 20px;
    box-sizing: border-box;
}

.photo-wall-year-grid {
    column-count: 2;
    column-gap: 14px;
}

.photo-wall-year-title {
    font-size: 16px;
    font-weight: bold;
    color: var(--title-color);
    margin-bottom: 12px;
}

.photo-wall-item {
    break-inside: avoid;
    -webkit-column-break-inside: avoid;
    margin-bottom: 16px;
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background: var(--line-color);
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(0,0,0,0.06);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.photo-wall-item img {
    width: 100%;
    display: block;
    transition: transform 0.35s ease;
}

.photo-wall-item:hover img { 
    transform: scale(1.04); 
}

.photo-wall-caption {
    position: absolute;
    left: 0; right: 0; bottom: 0;
    padding: 10px 12px;
    font-size: 13px;
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(to top, rgba(0,0,0,0.75), transparent);
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
}

.photo-wall-caption * {
    pointer-events: auto;
}

.photo-wall-item:hover .photo-wall-caption { 
    opacity: 1; 
}

.photo-wall-jump {
    text-decoration: underline;
    flex-shrink: 0;
    margin-left: 8px;
    font-size: 12px;
}

.photo-wall-jump:hover {
    color: #ff7875;
}

@media (max-width: 768px) {
    .photo-wall-caption { 
        opacity: 1; 
        background: linear-gradient(to top, rgba(0,0,0,0.65), transparent); 
    }
    .photo-wall-year-grid { 
        column-count: 2; 
        column-gap: 10px;
    }
    .photo-wall-item {
        margin-bottom: 10px;
        border-radius: 8px;
    }
}

/* ==========================================
   21. 宽屏横屏态侧边栏与双端响应式格局对齐
   - 宽屏态 (>= 1025px)：电脑网页版 = 平板 App 横屏 = 平板网页横屏
   - 竖屏态 (<= 1024px)：手机 App 竖屏 = 手机网页竖屏 = 平板 App 竖屏 = 平板网页竖屏
========================================== */
.web-sidebar {
    display: none !important;
}

/* 竖屏紧凑态（<= 1024px）：双端强制显示底部五栏导航栏 */
@media (max-width: 1024px) {
    .bottom-nav-container {
        display: flex !important;
        position: fixed !important;
        left: 0 !important;
        right: 0 !important;
        bottom: 0 !important;
        z-index: 1050 !important;
    }
}

/* 宽屏横屏态（>= 1025px 且高度 >= 540px，排除手机横屏）：电脑网页 & 平板 App/网页横屏统一生效 */
@media (min-width: 1025px) and (min-height: 540px) {
    /* 侧边栏基础样式（展开态默认宽度 210px，收起态 68px；图标锚点恒定在左 24px 中心，彻底消除收起弹跳） */
    .web-sidebar {
        display: flex !important;
        flex-direction: column;
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        width: 210px;
        padding-top: env(safe-area-inset-top, 0px);
        background: var(--card-bg);
        border-right: 1px solid var(--line-color);
        box-shadow: 2px 0 16px rgba(0, 0, 0, 0.03);
        z-index: 1050;
        box-sizing: border-box;
        transition: width 0.26s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.26s ease;
        user-select: none;
        overflow-x: hidden;
    }

    body.dark-mode .web-sidebar {
        box-shadow: 2px 0 16px rgba(0, 0, 0, 0.25);
    }
    body.is-app .web-sidebar {
        padding-top: max(36px, calc(18px + env(safe-area-inset-top, 0px))) !important;
    }

    /* 侧边栏头部：左内边距恒定 18px，使 32px Logo 中心固定在 x=34px（68px 窄栏正中央） */
    .web-sidebar-header {
        display: flex;
        align-items: center;
        justify-content: flex-start;
        padding: 0 18px;
        height: 64px;
        border-bottom: 1px solid var(--line-color);
        flex-shrink: 0;
        box-sizing: border-box;
        overflow: hidden;
    }

    .web-sidebar-brand {
        display: flex;
        align-items: center;
        gap: 12px;
        overflow: hidden;
        width: 100%;
    }

    .web-sidebar-logo {
        width: 32px;
        height: 32px;
        border-radius: 8px;
        object-fit: cover;
        flex-shrink: 0;
    }

    .web-sidebar-title {
        font-size: 17px;
        font-weight: 800;
        color: var(--title-color);
        letter-spacing: -0.3px;
        white-space: nowrap;
        opacity: 1;
        max-width: 130px;
        transition: opacity 0.18s ease, max-width 0.24s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* 侧边栏导航列表：微调上下伪元素比例，使图标整体上移 */
    .web-sidebar-nav {
        display: flex;
        flex-direction: column;
        gap: 10px;
        padding: 10px 12px;
        flex: 1;
        overflow-y: auto;
        overflow-x: hidden;
    }

    .web-sidebar-nav::before {
        content: '';
        flex: 0.15 1 0px;
        max-height: 12px;
    }

    .web-sidebar-nav::after {
        content: '';
        flex: 2.8 1 0px;
    }

    /* 导航项：容器左 padding 12px + 内部左 padding 12px = 24px，20px 图标中心恰好在 x=34px */
    .web-sidebar-nav .nav-item {
        display: flex;
        align-items: center;
        justify-content: flex-start;
        gap: 14px;
        height: 44px;
        padding: 0 12px;
        border-radius: 12px;
        color: var(--date-color);
        font-size: 15px;
        font-weight: 600;
        text-decoration: none;
        cursor: pointer;
        transition: background-color 0.2s ease, color 0.2s ease;
        white-space: nowrap;
        box-sizing: border-box;
        flex-shrink: 0;
        overflow: hidden;
    }

    .web-sidebar-nav .nav-item svg {
        flex-shrink: 0;
        width: 20px;
        height: 20px;
    }

    .web-sidebar-nav .nav-text {
        opacity: 1;
        max-width: 120px;
        overflow: hidden;
        transition: opacity 0.18s ease, max-width 0.24s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .web-sidebar-nav .nav-item:hover {
        color: var(--title-color);
        background: rgba(125, 125, 125, 0.08);
    }

    .web-sidebar-nav .nav-item.active {
        color: #ff4d4f !important;
        background: rgba(255, 77, 79, 0.1);
    }

    /* 侧边栏下部附加区：个人迷你名片 + 亮色/跟随系统/深色快捷切换 */
    .web-sidebar-Extras {
        display: flex;
        flex-direction: column;
        gap: 10px;
        padding: 12px 12px 10px 12px;
        border-top: 1px dashed var(--line-color);
        flex-shrink: 0;
        box-sizing: border-box;
        overflow: hidden;
    }

    .web-sidebar-user-card {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 6px;
        border-radius: 12px;
        background: var(--bg-color);
        border: 1px solid var(--line-color);
        cursor: pointer;
        transition: border-color 0.2s ease, background-color 0.2s ease;
        box-sizing: border-box;
        overflow: hidden;
        height: 44px;
    }

    .web-sidebar-user-card:hover {
        border-color: #0088cc;
    }

    .web-sidebar-user-avatar {
        width: 30px;
        height: 30px;
        border-radius: 50%;
        object-fit: cover;
        flex-shrink: 0;
        border: 1px solid var(--line-color);
    }

    .web-sidebar-user-info {
        display: flex;
        align-items: center;
        justify-content: center;
        min-width: 0;
        flex: 1;
        padding-right: 14px;
        opacity: 1;
        max-width: 130px;
        transition: opacity 0.18s ease, max-width 0.24s cubic-bezier(0.4, 0, 0.2, 1), padding 0.24s ease;
    }

    .web-sidebar-user-name {
        font-size: 14px;
        font-weight: 700;
        color: var(--title-color);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        text-align: center;
        line-height: 1.25;
    }

    .web-sidebar-theme-bar {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 4px;
        background: var(--bg-color);
        border: 1px solid var(--line-color);
        border-radius: 10px;
        padding: 3px;
        box-sizing: border-box;
        height: 36px;
        align-items: center;
    }

    .web-theme-chip {
        height: 28px;
        border: none;
        background: transparent;
        color: var(--date-color);
        border-radius: 7px;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        padding: 0;
        transition: background-color 0.2s ease, color 0.2s ease;
    }

    .web-theme-chip:hover {
        color: var(--title-color);
    }

    .web-theme-chip.active {
        background: var(--card-bg);
        color: #ff4d4f;
        box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
    }

    body.dark-mode .web-theme-chip.active {
        color: #40a9ff;
        box-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
    }

    /* 侧边栏独立退出登录按钮（展开态图标+文字居中；收起态收缩为纯图标居中） */
    .web-sidebar-logout-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        width: 100%;
        height: 36px;
        padding: 0 12px;
        border-radius: 10px;
        background: rgba(255, 77, 79, 0.08);
        border: 1px solid rgba(255, 77, 79, 0.22);
        color: #ff4d4f;
        font-size: 13px;
        font-weight: 600;
        cursor: pointer;
        box-sizing: border-box;
        white-space: nowrap;
        overflow: hidden;
        transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
    }

    .web-sidebar-logout-btn svg {
        flex-shrink: 0;
    }

    .web-sidebar-logout-btn:hover {
        background: rgba(255, 77, 79, 0.15);
        border-color: rgba(255, 77, 79, 0.4);
    }

    .web-sidebar-logout-btn:active {
        transform: scale(0.97);
    }

    .web-sidebar-logout-text {
        opacity: 1;
        max-width: 100px;
        overflow: hidden;
        transition: opacity 0.18s ease, max-width 0.24s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* 侧边栏底部固定/收起控制栏：左内边距恒定 16px，使 36px 按钮中心固定在 x=34px */
    .web-sidebar-footer {
        display: flex;
        align-items: center;
        justify-content: flex-start;
        padding: 10px 16px calc(10px + env(safe-area-inset-bottom, 0px)) 16px;
        border-top: 1px solid var(--line-color);
        flex-shrink: 0;
        box-sizing: border-box;
        overflow: hidden;
    }

    .web-sidebar-toggle {
        background: none;
        border: none;
        color: var(--date-color);
        width: 36px;
        height: 36px;
        border-radius: 8px;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: background-color 0.2s, color 0.2s;
        padding: 0;
        flex-shrink: 0;
    }

    .web-sidebar-toggle:hover {
        color: var(--title-color);
        background: rgba(125, 125, 125, 0.1);
    }

    /* 折叠状态（收缩成 68px 纯图标窄栏，不改变任何图标的左偏移或高度，零弹跳） */
    body.web-sidebar-collapsed .web-sidebar {
        width: 68px;
    }

    /* 悬停抽屉式浮层展开 */
    body.web-sidebar-collapsed .web-sidebar.hover-expanded {
        width: 210px;
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.12);
    }

    body.dark-mode.web-sidebar-collapsed .web-sidebar.hover-expanded {
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.45);
    }

    /* 折叠且未悬停时平滑隐去文字（不使用 display:none 破坏 flex 对齐基准） */
    body.web-sidebar-collapsed .web-sidebar:not(.hover-expanded) .web-sidebar-title,
    body.web-sidebar-collapsed .web-sidebar:not(.hover-expanded) .nav-text,
    body.web-sidebar-collapsed .web-sidebar:not(.hover-expanded) .web-sidebar-user-info,
    body.web-sidebar-collapsed .web-sidebar:not(.hover-expanded) .web-sidebar-logout-text {
        opacity: 0;
        max-width: 0;
        padding-right: 0;
        pointer-events: none;
    }

    body.web-sidebar-collapsed .web-sidebar:not(.hover-expanded) .web-sidebar-brand,
    body.web-sidebar-collapsed .web-sidebar:not(.hover-expanded) .web-sidebar-nav .nav-item,
    body.web-sidebar-collapsed .web-sidebar:not(.hover-expanded) .web-sidebar-user-card,
    body.web-sidebar-collapsed .web-sidebar:not(.hover-expanded) .web-sidebar-logout-btn {
        gap: 0;
    }

    /* 收起态下主题栏只显示当前激活的主题图标（点击可循环切换亮色/跟随系统/深色） */
    body.web-sidebar-collapsed .web-sidebar:not(.hover-expanded) .web-sidebar-theme-bar {
        grid-template-columns: 1fr;
    }

    body.web-sidebar-collapsed .web-sidebar:not(.hover-expanded) .web-theme-chip:not(.active) {
        display: none;
    }

    /* 宽屏态主内容区边距避让（与侧边栏完全同频 0.26s 缓动） */
    body {
        padding-left: calc(210px + 30px);
        padding-right: 30px;
        padding-top: 20px;
        padding-bottom: 20px !important;
        transition: padding-left 0.26s cubic-bezier(0.4, 0, 0.2, 1);
    }

    body.is-app {
        padding-top: max(38px, calc(20px + env(safe-area-inset-top, 0px))) !important;
    }

    body.web-sidebar-collapsed {
        padding-left: calc(68px + 30px);
    }

    /* 后台没有左侧导航栏：重置主站的侧栏避让，保持整页水平居中 */
    body.admin-page {
        padding-left: 30px;
        padding-right: 30px;
    }

    /* 宽屏横屏下无底部导航栏，回忆视图直接撑满剩余视口高度 */
    body.memories-active {
        padding-bottom: 0 !important;
    }

    #memories-view.active {
        height: 100% !important;
    }

    /* 右侧时间导航保持 fixed 悬浮，不改变 body 的 padding-right，确保顶部标题栏与三大子面板切换时始终居中零位移；
       仅在时间轴面板内部根据右侧剩余空白动态预留悬浮导航栏位置，防止时间轴内容与右侧操作图标被遮挡 */
    #memories-timeline-panel {
        padding-right: clamp(4px, calc(282px - max(0px, (100vw - 270px - 1000px) / 2)), 272px) !important;
    }

    body.web-sidebar-collapsed #memories-timeline-panel {
        padding-right: clamp(4px, calc(282px - max(0px, (100vw - 128px - 1000px) / 2)), 272px) !important;
    }

    /* 未登录时重置对称边距，确保登录卡片水平与垂直居中 */
    body:has(#login-modal:not(.hidden)) {
        padding: 20px;
    }

    /* 宽屏横屏态隐藏底部导航栏，统一使用左侧栏 */
    .bottom-nav-container {
        display: none !important;
    }

    /* 宽屏横屏态隐藏回忆页移动端搜索顶栏（搜索已在右侧常驻时间导航栏内） */
    .memories-top-bar {
        display: none !important;
    }

    /* 宽屏横屏态子页签栏与标题字号对齐“那年今日”(28px) */
    .memories-sub-header {
        height: 64px !important;
        min-height: 64px !important;
        padding: 8px 0 6px 0 !important;
    }

    .sub-tab-item {
        font-size: 28px !important;
        letter-spacing: -0.5px !important;
        line-height: 1.2 !important;
        padding-bottom: 8px !important;
    }

    /* 宽屏横屏态右下角悬浮按钮（向左平移让出 240px 宽的时间轴导航栏） */
    .fab {
        right: 288px !important;
    }
    #back-to-top {
        bottom: 85px !important;
    }
    #toggle-expand-all {
        bottom: 139px !important;
    }

    .photo-wall-year-grid {
        column-count: 3;
        column-gap: 18px;
    }
}

/* ==========================================
   手机端横屏强拦截遮罩（仅在短边 <= 540px 的手机横屏时显现并阻断操作）
========================================== */
.landscape-blocker {
    display: none;
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    background-color: var(--bg-color);
    z-index: 100001;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    box-sizing: border-box;
    text-align: center;
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
}

.landscape-blocker.force-active {
    display: flex !important;
}

/* 纯 CSS 媒体查询兜底：针对触屏手机横屏（高度 <= 540px 且横向）立即展示拦截层 */
@media (orientation: landscape) and (max-height: 540px) and (hover: none) and (pointer: coarse) {
    .landscape-blocker {
        display: flex !important;
    }
}

.landscape-blocker-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    max-width: 320px;
}

.landscape-icon-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.landscape-rotate-arrow {
    color: #ff4d4f;
    margin-bottom: -4px;
    animation: arrowRotateHint 2.2s ease-in-out infinite;
}

.landscape-phone-icon {
    color: #ff4d4f;
    animation: phoneRotateHint 2.2s ease-in-out infinite;
}

@keyframes arrowRotateHint {
    0%, 15% { opacity: 0.45; transform: translateX(-4px) rotate(-12deg); }
    45%, 70% { opacity: 1; transform: translateX(2px) rotate(8deg); }
    100% { opacity: 0.45; transform: translateX(-4px) rotate(-12deg); }
}

@keyframes phoneRotateHint {
    0%, 15% { transform: rotate(-90deg); }
    45%, 70% { transform: rotate(0deg); }
    100% { transform: rotate(-90deg); }
}

.landscape-blocker-title {
    font-size: 18px;
    font-weight: 800;
    color: var(--title-color);
}

.landscape-blocker-desc {
    font-size: 13px;
    color: var(--date-color);
    line-height: 1.6;
}

/* 更新日志富文本渲染（App 端 / 网页端通用） */
.changelog-render {
    font-size: 13px;
    color: var(--text-color);
    line-height: 1.6;
    white-space: normal;
    word-break: break-word;
}
.changelog-render h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--title-color);
    margin: 10px 0 6px;
    padding-bottom: 4px;
    border-bottom: 1px dashed var(--line-color);
}
.changelog-render h5 {
    font-size: 13px;
    font-weight: 600;
    color: var(--title-color);
    margin: 8px 0 4px;
}
.changelog-render p {
    margin: 4px 0;
}
.changelog-render ul,
.changelog-render ol {
    margin: 4px 0;
    padding-left: 18px;
}
.changelog-render li {
    margin: 3px 0;
}
.changelog-render strong {
    font-weight: 600;
    color: var(--title-color);
}
.changelog-render a {
    color: #4a90d9;
    text-decoration: underline;
    word-break: break-all;
}
body.dark-mode .changelog-render a {
    color: #6ab0f3;
}
/* 历史版本日志弹窗与版本卡片 */
.changelog-history-box {
    background: var(--card-bg);
    width: 92%;
    max-width: 560px;
    height: 78vh;
    max-height: 640px;
    padding: 20px 18px 16px 20px;
    border-radius: 18px;
    position: relative;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.25);
    color: var(--text-color);
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--line-color);
    animation: commentPopIn 0.22s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

.changelog-history-header {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--line-color);
    flex-shrink: 0;
}

.changelog-history-body {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    padding: 14px 6px 20px 2px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.changelog-version-card {
    background: var(--bg-color);
    border: 1px solid var(--line-color);
    border-radius: 12px;
    padding: 14px 16px;
    box-sizing: border-box;
}

.changelog-version-card:first-child {
    border-color: rgba(255, 77, 79, 0.4);
}

.changelog-version-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding-bottom: 8px;
    margin-bottom: 8px;
    border-bottom: 1px dashed var(--line-color);
    flex-wrap: wrap;
}

.changelog-version-tag {
    font-size: 15px;
    font-weight: 800;
    color: var(--title-color);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.changelog-latest-pill {
    font-size: 10px;
    font-weight: 700;
    background: #ff4d4f;
    color: #ffffff;
    padding: 1px 6px;
    border-radius: 8px;
}

.changelog-version-date {
    font-size: 12px;
    color: var(--date-color);
    font-family: monospace;
}

.changelog-sec-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--title-color);
    margin: 8px 0 4px 0;
}
/* 回忆视图：刚性锁屏定高与 Tab 独立纵向滚动（确保顶栏与子页签栏 100% 冻结在顶部，且底部紧贴导航栏无空白） */
/* 注意：不能把 .memories-active 与 :has() 写进同一个选择器列表，
   旧版 Android WebView 不识别 :has() 时整条规则会失效，导致 App 端高度锁不住。 */
body.memories-active {
    height: 100vh !important;
    height: 100dvh !important;
    overflow: hidden !important;
    padding-bottom: calc(58px + env(safe-area-inset-bottom, 0px)) !important;
}

body:has(#memories-view.active) {
    height: 100vh !important;
    height: 100dvh !important;
    overflow: hidden !important;
    padding-bottom: calc(58px + env(safe-area-inset-bottom, 0px)) !important;
}

@media (max-width: 768px) {
    body.memories-active:not(.is-app) {
        padding-top: calc(6px + env(safe-area-inset-top, 0px)) !important;
    }

    body:not(.is-app):has(#memories-view.active) {
        padding-top: calc(6px + env(safe-area-inset-top, 0px)) !important;
    }
}

body.memories-active #main-content {
    flex: 1;
    height: 100%;
    min-height: 0;
    overflow: hidden;
}

#main-content:has(#memories-view.active) {
    flex: 1;
    height: 100%;
    min-height: 0;
    overflow: hidden;
}

#memories-view.active {
    /* 强制 flex 纵向容器，防止被 .view-section.active 的 display:block 覆盖导致内部滑轨高度失控随页面滚走 */
    display: flex !important;
    flex-direction: column !important;
    flex: 1 1 auto;
    height: 100%;
    max-height: 100%;
    min-height: 0;
    overflow: hidden !important;
    box-sizing: border-box;
}
.memories-sub-header {
    position: relative;
    z-index: 100 !important;
    background: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--line-color);
    width: 100%;
    box-sizing: border-box;
    flex-shrink: 0;
    min-height: 54px;
    height: 54px; /* 固定 Tab 栏高度，杜绝右侧目录按钮显隐引起的 8px 整页跳动 */
}

.sub-tab-items-left {
    display: flex;
    align-items: center;
    gap: 20px;
    position: relative;
}

.sub-tab-item {
    font-size: 16px;
    font-weight: bold;
    color: var(--date-color);
    cursor: pointer;
    position: relative;
    padding-bottom: 6px;
    user-select: none;
    transition: color 0.2s ease;
}

.sub-tab-item.active {
    color: var(--title-color);
}

.sub-tab-item.active::after {
    display: none !important;
}

/* 跟手滑动的红色指示器下划线 */
.sub-tab-indicator {
    position: absolute;
    bottom: -1px;
    left: 0;
    height: 2px;
    background: #ff4d4f;
    border-radius: 2px;
    will-change: transform, width;
    pointer-events: none;
}

/* 滑轨外层视口 */
.memories-slider-viewport {
    flex: 1;
    min-height: 0;
    width: 100%;
    overflow: hidden;
    position: relative;
}

/* 三卡槽连接滑轨 */
.memories-slider-track {
    display: flex;
    width: 300%;
    height: 100%;
    will-change: transform;
    transform: translate3d(0, 0, 0);
}

/* 独立纵向滚动子面板：顶部内边距统一归零 */
.memories-panel {
    flex: 0 0 33.333333%;
    width: 33.333333%;
    height: 100%;
    min-height: 0;
    max-height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    box-sizing: border-box;
    padding: 0 4px 12px 4px;
    overscroll-behavior-y: contain; 
}

/* 时间轴线面板与内容顶部基准线 */
#memories-timeline-panel {
    padding-top: 0;
}
#memories-timeline {
    padding-top: 10px;
}

/* 相册与人物面板首项元素顶部基准线，与时间轴线严格对齐 */
#memories-album-panel,
#memories-classmates-panel {
    padding-top: 0;
}
#memories-classmates-panel {
    padding-bottom: 16px;
}
#memories-album-panel .photo-wall,
#memories-classmates-panel .classmates-grid {
    margin-top: 0;
    padding-top: 10px;
}
#memories-album-panel .photo-wall-year:first-child .photo-wall-year-title {
    margin-top: 0;
}

/* 交互动效、图片热区与拖拽手柄 */
.emoji-drag-handle {
    cursor: grab;
    color: var(--date-color);
    font-size: 16px;
    letter-spacing: -2px;
    user-select: none;
    padding: 4px 6px;
}
.emoji-drag-handle:active { cursor: grabbing; }
.emoji-edit-row.dragging { opacity: 0.5; }
.emoji-edit-row.drag-over { outline: 2px dashed var(--date-color); outline-offset: 2px; border-radius: 6px; }

.modal-zoom-hint {
    position: absolute; left: 50%; top: 50%;
    transform: translate(-50%, -50%);
    display: flex; align-items: center; justify-content: center;
    background: rgba(60, 60, 60, 0.35); border-radius: 18px; padding: 16px 20px;
    pointer-events: none; z-index: 5;
}
.modal-zoom-hint.hidden { display: none; }
.modal-zoom-hint .modal-zoom-hint-mouse { width: 52px; height: 64px; display: block; }
.modal-zoom-hint .modal-zoom-hint-badge {
    position: absolute; right: -6px; bottom: 2px;
    width: 32px; height: 26px; background: rgba(70, 70, 70, 0.85);
    border: 2px solid rgba(200, 200, 200, 0.65); border-radius: 8px;
    color: rgba(230, 230, 230, 0.95); font-size: 15px; line-height: 1;
    display: flex; align-items: center; justify-content: center;
}

.modal-hint-zone {
    position: absolute; left: 50%; top: 50%;
    transform: translate(-50%, -50%);
    width: 180px; height: 150px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 20px; z-index: 6; cursor: zoom-in;
}

.sidebar-search-box {
    display: flex !important; align-items: center; gap: 6px;
    padding: 7px 12px; margin: 4px 0 2px 0;
    border: 1px solid var(--line-color); border-radius: 20px;
    background: var(--bg-color); color: var(--date-color); flex-shrink: 0;
}
.sidebar-search-box input {
    flex: 1; min-width: 0; background: transparent;
    border: none; outline: none; color: var(--text-color); font-size: 13px;
}

/* ==========================================
   22. 评论系统与引用高亮
========================================== */
.comment-entry-bar {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    flex-wrap: nowrap !important;
    width: 100% !important;
    box-sizing: border-box !important;
    margin-top: 10px;
    padding-top: 8px;
    border-top: 1px dashed var(--line-color);
    color: var(--title-color);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    user-select: none;
    transition: opacity 0.2s;
}
.comment-entry-bar:hover { opacity: 0.8; }

.comment-entry-left {
    display: flex !important;
    align-items: center !important;
    gap: 6px;
    color: var(--date-color);
    flex-shrink: 1;
    min-width: 0;
}
.comment-entry-left.has-comments { color: #ff4d4f; }
.comment-entry-bar > svg { flex-shrink: 0; }

.comment-modal-panel {
    background: var(--bg-color);
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    /* 顶部预留出充足的状态栏高度，避免 ← 评论区 与时间网速重叠 */
    padding: max(38px, calc(20px + env(safe-area-inset-top, 0px))) 16px 20px 16px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center; 
}

.comment-modal-header,
.comment-event-preview-card,
.comment-messages-list,
.comment-reply-bar,
.comment-input-area {
    width: 100%;
    max-width: 1000px;
    box-sizing: border-box;
}

.comment-modal-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line-color);
    color: var(--title-color);
}
.close-comment-modal-btn {
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    color: var(--text-color);
    transition: all 0.15s ease;
}

/* 浅色模式反馈：红高亮 */
.close-comment-modal-btn:hover {
    color: #ff4d4f;
    background: rgba(255, 77, 79, 0.12);
}

.close-comment-modal-btn:active {
    transform: scale(0.92);
    color: #ff4d4f;
    background: rgba(255, 77, 79, 0.22);
}

/* 暗色模式反馈：稍亮高亮 */
body.dark-mode .close-comment-modal-btn:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.14);
}

body.dark-mode .close-comment-modal-btn:active {
    transform: scale(0.92);
    color: #ffffff;
    background: rgba(255, 255, 255, 0.25);
}
.comment-modal-body {
    flex: 1;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    padding-top: 15px;
    overflow-anchor: none !important;
}

.comment-event-preview-card {
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    border-radius: 12px;
    padding: 14px 16px;
    margin: 0 auto 15px auto;
    width: 100%;
    max-width: 800px;
    min-width: 0;
    box-sizing: border-box;
    word-break: break-all;
    overflow-wrap: anywhere;
    white-space: normal;
}

.comment-messages-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 0 4px 20px 4px;
    width: 100%;
    box-sizing: border-box;
    align-items: flex-start;
}

.comment-msg-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    width: auto;
    max-width: 88%;
    box-sizing: border-box;
    transition: all 0.3s ease;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

@keyframes commentPopIn {
    0% { opacity: 0; transform: translateY(12px) scale(0.96); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}
.comment-msg-item.comment-new-pop {
    animation: commentPopIn 0.35s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

@keyframes commentFadeOut {
    0% { opacity: 1; transform: scale(1); max-height: 120px; }
    100% { opacity: 0; transform: scale(0.85); max-height: 0; padding: 0; margin: 0; }
}
.comment-msg-item.comment-removing {
    animation: commentFadeOut 0.3s ease forwards;
    overflow: hidden;
}

.comment-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    border: 1px solid var(--line-color);
    cursor: pointer;
    transition: transform 0.2s ease, opacity 0.2s ease;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
    -webkit-user-drag: none;
    touch-action: manipulation;
}
.comment-avatar:hover {
    transform: scale(1.08);
    opacity: 0.9;
}

.comment-msg-body {
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    border-radius: 12px 14px 14px 4px;
    padding: 8px 12px;
    position: relative;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
    text-align: left;
    word-break: break-word;
    max-width: calc(100% - 44px);
    box-sizing: border-box;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

.comment-user-name {
    font-size: 13px;
    font-weight: 700;
    color: #0088cc;
    margin-bottom: 4px;
}

/* 通用/左侧引用回复框 */
.comment-quote-block {
    background: rgba(0, 136, 204, 0.08);
    border-left: 3px solid #0088cc;
    border-radius: 4px;
    padding: 5px 8px;
    margin-bottom: 6px;
    font-size: 12px;
    width: fit-content; 
    max-width: 100%;
    box-sizing: border-box;
    cursor: pointer;
    transition: background-color 0.2s ease;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}
.comment-quote-block:hover { background: rgba(0, 136, 204, 0.16); }
.comment-quote-user { font-weight: bold; color: #0088cc; }
.comment-quote-text {
    color: var(--date-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    word-break: break-all;
    padding-right: 2px;
}

/* 左侧：撤回引用框变灰 */
.comment-quote-block.comment-quote-revoked {
    background: rgba(140, 140, 140, 0.12) !important;
    border-left: 3px solid var(--date-color) !important;
    cursor: default !important;
}
.comment-quote-block.comment-quote-revoked .comment-quote-text {
    color: var(--date-color) !important;
    font-style: italic;
}

.comment-text-content {
    font-size: 14px;
    color: var(--text-color);
    line-height: 1.5;
    word-break: break-all;
    overflow-wrap: anywhere;
    white-space: pre-wrap;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

.comment-msg-time {
    font-size: 10px;
    color: var(--date-color);
    text-align: right;
    margin-top: 4px;
}

.comment-reactions-pills { margin-top: 6px !important; }

/* 引用源点击后淡蓝背景高亮动画 */
@keyframes commentFlashBlue {
    0% { background-color: rgba(0, 136, 204, 0.38); box-shadow: 0 0 12px rgba(0, 136, 204, 0.4); }
    40% { background-color: rgba(0, 136, 204, 0.25); box-shadow: 0 0 8px rgba(0, 136, 204, 0.25); }
    100% { background-color: var(--card-bg); box-shadow: none; }
}
@keyframes commentFlashBlueSelf {
    0% { background-color: rgba(0, 136, 204, 0.4); box-shadow: 0 0 12px rgba(0, 136, 204, 0.6); }
    50% { background-color: rgba(0, 136, 204, 0.7); box-shadow: 0 0 8px rgba(0, 136, 204, 0.3); }
    100% { background-color: #0088cc; box-shadow: 0 2px 8px rgba(0, 136, 204, 0.25); }
}
.comment-msg-body.highlight-comment-flash {
    animation: commentFlashBlue 2.5s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}
.comment-msg-item.is-self .comment-msg-body.highlight-comment-flash {
    animation: commentFlashBlueSelf 2.5s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}
/* 输入框与发送按钮（多行对齐与安全区适配） */
.comment-input-area {
    position: relative;
    display: flex;
    align-items: flex-end;
    gap: 10px;
    padding: 10px 12px calc(10px + env(safe-area-inset-bottom, 0px));
    background: var(--card-bg);
    border-top: 1px solid var(--line-color);
    border-radius: 16px 16px 0 0;
    box-sizing: border-box;
    width: 100%;
    max-width: 800px;
}

body.keyboard-open .comment-input-area {
    padding-bottom: 10px;
}

.comment-user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

/* 输入框外部相对定位包裹器 */
.comment-input-wrap {
    position: relative;
    flex: 1;
    display: flex;
    align-items: flex-end;
    min-width: 0;
}

#comment-input-field {
    width: 100%;
    border: 1px solid var(--line-color);
    border-radius: 18px;
    padding: 8px 38px 8px 14px; /* 右侧留出 38px，防止文字与字数提示重叠 */
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 14px;
    outline: none;
    resize: none;
    min-height: 36px;
    max-height: 96px;
    line-height: 1.42;
    font-family: inherit;
    box-sizing: border-box;
    overflow-y: hidden;
    -webkit-tap-highlight-color: transparent;
}

/* 剩余字数提示 */
.comment-char-count {
    position: absolute;
    right: 12px;
    bottom: 11px;
    font-size: 11px;
    color: var(--date-color);
    pointer-events: none;
    user-select: none;
    line-height: 1;
    font-variant-numeric: tabular-nums;
    transition: color 0.2s ease;
}

.comment-char-count.warn {
    color: #fa8c16;
}

.comment-char-count.danger {
    color: #ff4d4f;
    font-weight: 600;
}

/* 极简细滚动条（多行超出时显现） */
#comment-input-field::-webkit-scrollbar {
    width: 4px !important;
}
#comment-input-field::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
}
body.dark-mode #comment-input-field::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.25);
}
#comment-input-field::-webkit-scrollbar-track {
    margin: 6px 0; /* 上下内缩 6px，约束在圆角直线区间内，彻底防止滑块溢出圆角边界 */
    background: transparent;
}

.send-comment-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #0088cc;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.2s, background-color 0.2s, opacity 0.2s ease;
    flex-shrink: 0;
}
.send-comment-btn:hover {
    background: #0066cc;
    transform: scale(1.05);
}

.send-comment-btn:active:not(:disabled) {
    transform: scale(0.92) !important;
    background: #0055aa;
}

/* 发送中及防刷冷却禁用状态：颜色变淡并禁止触发 */
.send-comment-btn:disabled {
    opacity: 0.45 !important;
    cursor: not-allowed !important;
    pointer-events: none !important;
    transform: none !important;
}

.comment-reply-bar {
    display: flex;
    align-items: center;
    background: var(--card-bg);
    border-top: 1px solid var(--line-color);
    padding: 8px 12px;
    position: relative;
}
.reply-bar-accent {
    width: 3px;
    height: 32px;
    background: #0088cc;
    border-radius: 2px;
    margin-right: 8px;
}
.reply-bar-content { flex: 1; min-width: 0; }
.reply-bar-name { font-size: 12px; font-weight: bold; color: #0088cc; }
.reply-bar-text {
    font-size: 12px;
    color: var(--date-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.close-reply-bar-btn {
    font-size: 18px;
    color: var(--date-color);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.15s ease;
}

.close-reply-bar-btn:hover {
    color: #ff4d4f;
}

.close-reply-bar-btn:active {
    transform: scale(0.9);
    color: #ff4d4f;
    background: rgba(255, 77, 79, 0.15);
}

body.dark-mode .close-reply-bar-btn:hover {
    color: #ffffff;
}

body.dark-mode .close-reply-bar-btn:active {
    transform: scale(0.9);
    color: #ffffff;
    background: rgba(255, 255, 255, 0.2);
}

/* 评论长按/右键气泡 (主题跟随 & 表情 2 行) */
.comment-menu-picker {
    position: fixed;
    z-index: 3500;
}
.comment-menu-bubble {
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    color: var(--text-color);
    border-radius: 14px;
    padding: 10px 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: max-content;
    max-width: calc(100vw - 30px);
    box-sizing: border-box;
}
body.dark-mode .comment-menu-bubble {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.comment-emoji-capsule {
    display: grid;
    grid-template-rows: repeat(2, auto);
    grid-auto-flow: row; /* 从左到右按行排列，保持与后端 EMOJI_LIST 一致 */
    gap: 6px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--line-color);
    justify-content: start;
    overflow-x: auto;
    max-width: 100%;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.comment-emoji-capsule::-webkit-scrollbar {
    display: none !important; 
    width: 0 !important;
    height: 0 !important;
}

.comment-menu-actions { display: flex; flex-direction: column; }
.comment-menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    color: var(--text-color);
    font-size: 14px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}
.comment-menu-item:hover { background: rgba(128, 128, 128, 0.12); }

/* 中心频次警告弹窗 */
.center-alert-modal {
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
}
.center-alert-box {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 24px;
    width: 85%;
    max-width: 320px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}
.center-alert-icon { font-size: 36px; margin-bottom: 10px; }
.center-alert-text { font-size: 14px; color: var(--title-color); line-height: 1.6; margin-bottom: 20px; }
.center-alert-btn {
    width: 100%;
    padding: 10px 0;
    background: #0088cc;
    color: #fff;
    border: none;
    border-radius: 20px;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
}

/* ==========================================
   23. 自己发送的评论靠右对齐 (含高对比度引用框)
========================================== */
.comment-msg-item.is-self {
    flex-direction: row-reverse;
    align-self: flex-end;
    margin-left: auto;
}

.comment-msg-item.is-self .comment-msg-body {
    background: #0088cc;
    border-color: #0088cc;
    border-radius: 14px 12px 4px 14px;
    box-shadow: 0 2px 8px rgba(0, 136, 204, 0.25);
}

.comment-msg-item.is-self .comment-user-name {
    display: none;
}

.comment-msg-item.is-self .comment-text-content {
    color: #ffffff;
}

.comment-msg-item.is-self .comment-msg-time {
    color: rgba(255, 255, 255, 0.75);
}

/* 右侧正常引用框 */
.comment-msg-item.is-self .comment-quote-block {
    background: rgba(0, 0, 0, 0.15);
    border-left: 3px solid #ffffff;
}

.comment-msg-item.is-self .comment-quote-user {
    color: #ffffff;
    font-weight: bold;
}

.comment-msg-item.is-self .comment-quote-text {
    color: rgba(255, 255, 255, 0.95);
}

/* 右侧撤回引用框 */
.comment-msg-item.is-self .comment-quote-block.comment-quote-revoked {
    background: rgba(0, 0, 0, 0.22) !important;
    border-left: 3px solid rgba(255, 255, 255, 0.6) !important; /* 虚线 dashed 已改为实线 solid */
}

.comment-msg-item.is-self .comment-quote-block.comment-quote-revoked .comment-quote-text {
    color: rgba(255, 255, 255, 0.85) !important;
    font-style: italic;
}

/* 微信式评论发送状态（旋转圆圈 & 红色感叹号） */
.comment-send-status {
    display: flex;
    align-items: center;
    justify-content: center;
    align-self: center;
    flex-shrink: 0;
    width: 24px;
    height: 24px;
}

.comment-sending-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--line-color);
    border-top-color: var(--date-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    box-sizing: border-box;
}

.comment-send-fail-btn {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: #ff4d4f;
    color: #ffffff;
    border: none;
    padding: 0;
    font-size: 13px;
    font-weight: 800;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(255, 77, 79, 0.35);
    transition: transform 0.15s ease, opacity 0.15s ease;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.comment-send-fail-btn:hover {
    transform: scale(1.1);
}

.comment-send-fail-btn:active {
    transform: scale(0.92);
    opacity: 0.85;
}

/* 发送失败操作弹窗纵向按钮组 */
.comment-fail-actions-vertical {
    flex-direction: column;
}

.comment-fail-actions-vertical .confirm-dialog-btn {
    width: 100%;
    border-right: none !important;
    border-bottom: 1px solid var(--line-color);
    padding: 13px 0;
    font-size: 15px;
}

body.dark-mode .comment-fail-actions-vertical .confirm-dialog-btn {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.comment-fail-actions-vertical .confirm-dialog-btn:last-child {
    border-bottom: none !important;
}

.confirm-dialog-btn.primary-btn {
    color: #0088cc;
    font-weight: 600;
}

.confirm-dialog-btn.edit-btn {
    color: var(--title-color);
    font-weight: 500;
}

/* ==========================================
   24. 评论举报弹窗与理由选择网格
========================================== */
.report-box {
    background: var(--card-bg);
    width: 90%;
    max-width: 480px;
    padding: 24px;
    border-radius: 16px;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    color: var(--text-color);
    box-sizing: border-box;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--line-color);
}

.report-title {
    font-size: 15px;
    font-weight: bold;
    color: var(--title-color);
    margin: 0 0 12px 0;
}

.report-reasons-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.reason-chip {
    background: var(--bg-color);
    border: 1px solid var(--line-color);
    color: var(--text-color);
    padding: 10px 8px;
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s ease;
    user-select: none;
    box-sizing: border-box;
    width: 100%;
}

.reason-chip:hover {
    background: rgba(0, 136, 204, 0.08);
    border-color: #0088cc;
}

.reason-chip.selected {
    background: rgba(0, 136, 204, 0.15);
    border-color: #0088cc;
    color: #0088cc;
    font-weight: bold;
}

#custom-reason-input {
    width: 100%;
    box-sizing: border-box;
    border: 1px solid var(--line-color);
    border-radius: 8px;
    padding: 10px 12px;
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 13px;
    outline: none;
}

/* 举报文本框：禁缩放、按内容撑高 */
.report-textarea {
    width: 100%;
    box-sizing: border-box;
    border: 1px solid var(--line-color);
    border-radius: 8px;
    padding: 10px 12px;
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 13px;
    outline: none;
    resize: none !important; /* 禁止用户自由手动拉伸 */
    overflow-y: hidden;
    line-height: 1.5;
    font-family: inherit;
    min-height: 60px;
    transition: border-color 0.2s;
}

.report-textarea:focus, #custom-reason-input:focus {
    border-color: #0088cc;
}

.report-char-count {
    font-size: 11px;
    color: var(--date-color);
    text-align: right;
    margin-top: 4px;
}
/* ==========================================
   25. 回忆视图顶部栏、状态栏安全区避让与夹心搜索框
========================================== */
.memories-top-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-top: 10px;
    padding-bottom: 8px;
    width: 100%;
    box-sizing: border-box;
    max-height: 60px;
    opacity: 1;
    transform: translate3d(0, 0, 0);
    overflow: hidden;
    will-change: max-height, opacity, transform, padding;
}

body.is-app .memories-top-bar {
    padding-top: 10px; 
    padding-bottom: 8px;
    max-height: 64px;
}

/* 完全收起隐藏兜底类 */
.memories-top-bar.bar-hidden {
    max-height: 0 !important;
    opacity: 0 !important;
    padding-top: 0 !important;
    padding-bottom: 0 !important;
    transform: translate3d(0, -15px, 0) !important;
    pointer-events: none !important;
}
.memories-user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    border: 1px solid var(--line-color);
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
    cursor: pointer;
    transition: transform 0.2s ease, opacity 0.2s ease;
}
.memories-user-avatar:hover {
    transform: scale(1.05);
    opacity: 0.9;
}

.memories-user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 夹心搜索框 */
.memories-search-box {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--mask-bg);
    border: 1px solid var(--line-color);
    border-radius: 20px;
    padding: 6px 14px;
    box-sizing: border-box;
}

.memories-search-box svg {
    color: var(--date-color);
    flex-shrink: 0;
}

.memories-search-box input {
    flex: 1;
    min-width: 0;
    border: none;
    background: transparent;
    outline: none;
    color: var(--text-color);
    font-size: 14px;
}

.memories-notice-btn {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--title-color);
    cursor: pointer;
    flex-shrink: 0;
}

/* 消息未读红点 */
.notice-badge-dot {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 8px;
    height: 8px;
    background-color: #ff4d4f;
    border-radius: 50%;
    border: 2px solid var(--bg-color);
    box-shadow: 0 0 6px rgba(255, 77, 79, 0.6);
}

/* 消息通知弹窗 */
.notice-box {
    background: var(--card-bg);
    width: 90%;
    max-width: 450px;
    height: 75vh;
    max-height: 580px;
    padding: 20px 8px 16px 18px; /* 调整右侧内边距，为常驻滚动条预留专属滑动槽 */
    border-radius: 16px;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    color: var(--text-color);
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--line-color);
}

.notice-header {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--line-color);
    min-height: 32px;
}

.notice-back-btn {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
}

.notice-header-actions {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    gap: 8px;
}

.notice-header-btn {
    background: rgba(0, 0, 0, 0.05);
    border: none;
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    transition: transform 0.2s, color 0.2s, background 0.2s;
    padding: 0;
}

body.dark-mode .notice-header-btn {
    background: rgba(255, 255, 255, 0.1);
}

.notice-header-btn:hover {
    transform: scale(1.1);
    color: #0088cc;
    background: rgba(0, 136, 204, 0.12);
}
/* 修复通知弹窗标题栏按钮重叠 */
.notice-header-actions .close-profile-btn {
    position: static !important;
    transform: none !important;
}
/* 消除返回按钮出现时的下滑动画 */
.notice-back-btn {
    top: 50% !important;
    transform: translateY(-50%) !important;
    transition: color 0.2s ease, background-color 0.2s ease, opacity 0.2s ease !important;
}

.notice-back-btn:hover {
    transform: translateY(-50%) scale(1.1) !important;
}
/* 消息列表可滚动区域 */
.notice-list-container {
    flex: 1;
    min-height: 0; /* 允许 flex 容器自由收缩并产生滚动条 */
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 12px 6px 16px 0; /* 右侧预留 6px 滚动条间距，底部留出 16px 防时间截断 */
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* 消息列表可滚动区域（强制开启常驻滚动条） */
.notice-list-container {
    flex: 1;
    min-height: 0;
    overflow-y: scroll !important; /* 强制常驻显示滚动条，不再自动隐藏 */
    -webkit-overflow-scrolling: touch;
    padding: 12px 8px 36px 0; /* 底部预留 36px 缓冲，确保最后一条消息与发送时间完全滑出 */
    display: flex;
    flex-direction: column;
    gap: 10px;
    scrollbar-width: thin;
    scrollbar-color: rgba(0, 0, 0, 0.35) rgba(0, 0, 0, 0.05);
}

body.dark-mode .notice-list-container {
    scrollbar-color: rgba(255, 255, 255, 0.4) rgba(255, 255, 255, 0.06);
}

/* 消息列表高对比度常驻滚动条样式 */
.notice-list-container::-webkit-scrollbar {
    width: 6px !important;
    display: block !important;
}
.notice-list-container::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05) !important; /* 增加浅灰色滑道底色，一眼可见 */
    border-radius: 6px;
    margin: 6px 0;
}
body.dark-mode .notice-list-container::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.08) !important;
}
.notice-list-container::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.35) !important;
    border-radius: 6px !important;
}
.notice-list-container::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.55) !important;
}
body.dark-mode .notice-list-container::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.4) !important;
}
body.dark-mode .notice-list-container::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.65) !important;
}

.notice-item-time {
    font-size: 11px;
    color: var(--date-color);
    margin-top: 6px;
    text-align: right;
}

.notice-empty-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 35px 15px;
    gap: 14px;
    text-align: center;
}

.notice-empty-icon {
    width: 44px;
    height: 44px;
    color: var(--date-color);
    opacity: 0.7;
}

.notice-empty-text {
    font-size: 14px;
    color: var(--date-color);
    line-height: 1.5;
}

/* ==========================================
   26. 个人中心个人信息单元块与编辑弹窗
========================================== */
/* 个人资料弹窗：头像点击放大与更换头像按钮 */
.profile-modal-avatar {
    cursor: zoom-in;
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.profile-modal-avatar:hover {
    transform: scale(1.06);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.profile-change-avatar-btn {
    font-size: 12px !important;
    padding: 4px 10px !important;
    border-radius: 14px !important;
    white-space: nowrap;
}

.profile-entry-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 18px;
    background: var(--bg-color);
    border: 1px solid var(--line-color);
    border-radius: 14px;
    margin-bottom: 22px;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    user-select: none;
}

.profile-entry-card:hover {
    transform: translateY(-2px);
    border-color: #0088cc;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
}

body.dark-mode .profile-entry-card:hover {
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

.profile-card-left {
    display: flex;
    align-items: center;
    gap: 14px;
}

.profile-card-avatar-wrapper {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    border: 2px solid var(--line-color);
    background: var(--card-bg);
}

.profile-card-avatar-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.profile-card-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: left;
}

.profile-card-name {
    font-size: 17px;
    font-weight: bold;
    color: var(--title-color);
    letter-spacing: -0.2px;
}

.profile-card-id {
    font-size: 13px;
    color: var(--date-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, monospace;
}

.profile-card-right {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    color: var(--date-color);
    transition: color 0.2s ease;
}

.profile-entry-card:hover .profile-card-right {
    color: var(--title-color);
}

/* 个人信息编辑弹窗 */
.profile-edit-box {
    background: var(--card-bg);
    width: 92%;
    max-width: 480px;
    padding: 22px 24px 26px 24px;
    border-radius: 18px;
    position: relative;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.25);
    color: var(--text-color);
    box-sizing: border-box;
    max-height: 88vh;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--line-color);
}

.profile-edit-header {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--line-color);
}
.close-profile-btn {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-color);
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 50%;
    transition: transform 0.15s ease, color 0.2s, background-color 0.2s;
}

body.dark-mode .close-profile-btn {
    background: rgba(255, 255, 255, 0.1);
}

/* 浅色模式反馈：红高亮 */
.close-profile-btn:hover {
    transform: translateY(-50%) scale(1.08);
    color: #ff4d4f;
    background: rgba(255, 77, 79, 0.12);
}

.close-profile-btn:active {
    transform: translateY(-50%) scale(0.92);
    color: #ff4d4f;
    background: rgba(255, 77, 79, 0.22);
}

/* 暗色模式反馈：稍亮白/灰高亮 */
body.dark-mode .close-profile-btn:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.18);
}

body.dark-mode .close-profile-btn:active {
    transform: translateY(-50%) scale(0.92);
    color: #ffffff;
    background: rgba(255, 255, 255, 0.28);
}
.profile-edit-body {
    flex: 1;
    overflow-y: auto;
    padding-top: 15px;
    -webkit-overflow-scrolling: touch;
}

.profile-list-group {
    background: var(--bg-color);
    border: 1px solid var(--line-color);
    border-radius: 14px;
    overflow: hidden;
}

.profile-list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 13px 16px;
    border-bottom: 1px solid var(--line-color);
    font-size: 14px;
}

.profile-list-item:last-child {
    border-bottom: none;
}

.profile-item-label {
    font-weight: 500;
    color: var(--title-color);
    min-width: 90px;
    flex-shrink: 0;
}

.profile-modal-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--line-color);
    display: block;
}

.profile-input-field {
    border: none;
    background: transparent;
    text-align: right;
    color: var(--text-color); 
    font-size: 14px;
    outline: none;
    width: 100%;
    font-family: inherit;
}

.profile-input-field::placeholder {
    color: var(--date-color);
    opacity: 0.85;
}

.profile-list-item .text-muted,
.profile-item-val {
    color: var(--text-color);
    text-align: right;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    margin-left: auto;
    user-select: text;
}

.birthday-picker-box {
    background: var(--card-bg);
    width: 92%;
    max-width: 360px;
    padding: 20px;
    border-radius: 18px;
    position: relative;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.25);
    color: var(--text-color);
    box-sizing: border-box;
    max-height: 88vh;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--line-color);
}

.birthday-picker-header {
    position: relative; /* 关键：让关闭按钮以当前头部为基准定位在右上角 */
    display: flex;
    align-items: center;
    justify-content: center; /* 标题居中 */
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line-color);
    font-size: 16px;
    font-weight: bold;
    color: var(--title-color);
}

.birthday-picker-body {
    flex: 1;
    overflow-y: auto;
    padding-top: 4px;
}

.picker-section-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--date-color);
    margin: 12px 0 6px 0;
}

.year-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.month-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr); /* 月份每行 3 个 */
    gap: 8px;
}

.day-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr); /* 日期每行 7 个 */
    gap: 6px;
}

.picker-chip {
    padding: 7px 0;
    background: var(--bg-color);
    border: 1px solid var(--line-color);
    border-radius: 8px;
    color: var(--text-color);
    font-size: 13px;
    cursor: pointer;
    text-align: center;
    transition: all 0.15s ease;
    user-select: none;
    box-sizing: border-box;
    width: 100%;
}

.picker-chip:hover {
    border-color: #0088cc;
    background: rgba(0, 136, 204, 0.08);
}

.picker-chip.selected {
    background: #0088cc !important;
    border-color: #0088cc !important;
    color: #ffffff !important;
    font-weight: bold;
}
/* ==========================================
   27. 班级人物卡片网格与卡片样式
========================================== */
.classmates-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr); /* 移动端每行 2 个 */
    gap: 12px;
    width: 100%;
    box-sizing: border-box;
    margin-top: 15px;
    padding-bottom: 20px;
}

/* 网页桌面端人物卡片排布：大屏每行 4 个，中屏每行 3 个 */
@media (min-width: 769px) {
    .classmates-grid {
        grid-template-columns: repeat(4, 1fr) !important;
        gap: 16px !important;
    }
}

@media (min-width: 769px) and (max-width: 960px) {
    .classmates-grid {
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 14px !important;
    }
}

@media (max-width: 600px) {
    .classmates-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
}

.classmate-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    border-radius: 14px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
    cursor: pointer;
    user-select: none;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    box-sizing: border-box;
    min-width: 0;
}

.classmate-card:hover {
    transform: translateY(-2px);
    border-color: #0088cc;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

body.dark-mode .classmate-card:hover {
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.35);
}

.classmate-card-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    border: 1px solid var(--line-color);
    background: var(--bg-color);
}

.classmate-card-name {
    font-size: 15px;
    font-weight: bold;
    color: var(--title-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    text-align: left;
}

/* ==========================================
   28. 省份分布地图与省市选择器样式
========================================== */
.map-distribution-card {
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    border-radius: 18px;
    padding: 20px;
    margin-top: 15px;
    margin-bottom: 20px;
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.03);
    box-sizing: border-box;
    width: 100%;
}

.map-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.map-card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--date-color);
}

.china-map-svg-wrapper {
    width: 100%;
    max-width: 520px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    position: relative;
}

.china-map-svg {
    width: 100%;
    height: auto;
    aspect-ratio: 1000 / 709; /* 强制锁定地图固有比例，防止在 Android WebView 中高度塌陷为 0 */
    min-height: 240px;
    display: block;
}

/* 南海诸岛附图框 */
.south-sea-box {
    fill: var(--card-bg);
    fill-opacity: 0.85; 
    stroke: var(--line-color);
    stroke-width: 1.2;
}
.south-sea-border {
    fill: none;
    stroke: var(--line-color);
    stroke-width: 1.2;
}

/* 地图省份区块基础与梯度高亮色 */
.china-province-path {
    fill: #e9ecef;
    stroke: #ffffff;
    stroke-width: 1.4;
    stroke-linejoin: round;
    stroke-linecap: round;
    transition: fill 0.3s ease;
    cursor: pointer;
}

body.dark-mode .china-province-path {
    fill: #262a33;
    stroke: #333842;
}

/* 南海诸岛附图框深色模式适配 */
body.dark-mode .south-sea-box {
    fill: #222222;
    stroke: #333842;
}
body.dark-mode .south-sea-border {
    stroke: #333842;
}

/* 南海诸岛与十段线专属显色样式（防止与底色混为一体） */
.china-province-path[id*="-nh"]:hover {
    fill: #0066cc !important;
    stroke: #0066cc !important;
}

/* 依据人数梯度的亮蓝色彩系（亮色模式） */
.china-province-path.level-1 { fill: #bae7ff; }  /* 1-2人 */
.china-province-path.level-2 { fill: #40a9ff; }  /* 3-5人 */
.china-province-path.level-3 { fill: #0088ff; }  /* 6-15人 */
.china-province-path.level-4 { fill: #0066cc; }  /* 16人以上 */

/* 人数梯度亮蓝（深色模式） */
body.dark-mode .china-province-path.level-1 { fill: #1d5f9e; }  /* 1-2人 清晰可见的宝石蓝 */
body.dark-mode .china-province-path.level-2 { fill: #1890ff; }  /* 3-5人 鲜亮湛蓝 */
body.dark-mode .china-province-path.level-3 { fill: #40a9ff; }  /* 6-15人 亮天蓝 */
body.dark-mode .china-province-path.level-4 { fill: #69c0ff; }  /* 16人以上 莹亮冰蓝 */

.china-province-path:hover {
    opacity: 0.85;
}

/* 顶层描边图层：穿透点击，渲染蓝色高亮边界 */
.map-hover-border,
.south-hover-border {
    fill: none !important;
    stroke: #0066cc !important;
    stroke-width: 2.6 !important;
    stroke-linejoin: round !important;
    stroke-linecap: round !important;
    pointer-events: none !important;
}

body.dark-mode .map-hover-border,
body.dark-mode .south-hover-border {
    stroke: #40a9ff !important;
}

/* 深色模式：统计圆点与地图填充色同步 */
body.dark-mode .map-stat-dot.level-1 { background: #1d5f9e; }
body.dark-mode .map-stat-dot.level-2 { background: #1890ff; }
body.dark-mode .map-stat-dot.level-3 { background: #40a9ff; }
body.dark-mode .map-stat-dot.level-4 { background: #69c0ff; }
body.dark-mode .map-stat-dot.gray { background: #444a57; }

/* 底部 Top4 统计卡片网格 */
.map-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-top: 18px;
    width: 100%;
    box-sizing: border-box;
}

.map-stat-item {
    background: var(--bg-color);
    border: 1px solid var(--line-color);
    border-radius: 12px;
    padding: 12px 8px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.map-stat-count {
    font-size: 17px;
    font-weight: 800;
    color: var(--title-color);
}

.map-stat-label {
    font-size: 12px;
    color: var(--date-color);
    display: flex;
    align-items: center;
    gap: 4px;
}

.map-stat-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #e9ecef;
}

.map-stat-dot.level-1 { background: #bae7ff; }  /* 1-2人 浅蓝 */
.map-stat-dot.level-2 { background: #40a9ff; }  /* 3-5人 亮蓝 */
.map-stat-dot.level-3 { background: #0088ff; }  /* 6-15人 湛蓝 */
.map-stat-dot.level-4 { background: #0066cc; }  /* 16人以上 深蓝 */
.map-stat-dot.gray { background: #d9d9d9; }

/* 地图 Tooltip 悬停气泡 */
.map-tooltip {
    position: fixed;
    background: rgba(0, 0, 0, 0.85);
    color: #fff;
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 12px;
    pointer-events: none;
    z-index: 3000;
    line-height: 1.4;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    display: none;
}

/* 省市二级选择弹窗 */
.city-picker-box {
    background: var(--card-bg);
    width: 92%;
    max-width: 420px;
    padding: 20px;
    border-radius: 18px;
    box-sizing: border-box;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--line-color);
}

.city-picker-header {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line-color);
    font-size: 16px;
    font-weight: bold;
    color: var(--title-color);
}

.city-picker-tabs {
    display: flex;
    gap: 10px;
    margin: 12px 0 8px 0;
}

.city-tab-btn {
    flex: 1;
    padding: 8px 0;
    border: 1px solid var(--line-color);
    background: var(--bg-color);
    color: var(--date-color);
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
}

.city-tab-btn.active {
    background: rgba(0, 136, 204, 0.1);
    border-color: #0088cc;
    color: #0088cc;
    font-weight: bold;
}

.city-chips-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    overflow-y: auto;
    max-height: 50vh;
    padding: 6px 2px;
}

/* ==========================================
   29. 省份同学明细弹窗样式
========================================== */
.province-modal-box {
    background: var(--card-bg);
    width: 90%;
    max-width: 440px;
    padding: 20px;
    border-radius: 18px;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    color: var(--text-color);
    box-sizing: border-box;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--line-color);
}

.province-modal-header {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line-color);
}

.province-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 12px 2px 4px 2px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.province-classmate-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: var(--bg-color);
    border: 1px solid var(--line-color);
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.15s ease, border-color 0.15s ease;
}

.province-classmate-card:hover {
    transform: translateY(-1px);
    border-color: #0088cc;
}

.province-card-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.province-card-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--line-color);
}

.province-card-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--title-color);
}

.province-card-city-badge {
    font-size: 12px;
    color: #0088cc;
    background: rgba(0, 136, 204, 0.1);
    padding: 3px 8px;
    border-radius: 6px;
    font-weight: 500;
}

body.dark-mode .province-card-city-badge {
    background: rgba(0, 136, 204, 0.2);
    color: #40a9ff;
}

/* 有同学分布的省份增加手势提示与脉冲微动效 */
.china-province-path.has-classmates {
    cursor: pointer !important;
}

/* ==========================================
   30. 评论 @ 提及候选人列表弹窗
========================================== */
.at-mention-picker {
    position: absolute;
    bottom: calc(100% + 8px); /* 无论输入框几行，始终紧贴输入栏上方 8px */
    left: 12px;
    right: 12px;
    max-width: 380px;
    margin: 0 auto;
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    border-radius: 14px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16);
    z-index: 3100;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    max-height: 210px;
    animation: commentPopIn 0.2s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

.at-mention-header {
    padding: 8px 12px;
    font-size: 11px;
    color: var(--date-color);
    font-weight: 600;
    border-bottom: 1px solid var(--line-color);
    background: var(--bg-color);
    user-select: none;
}

.at-mention-list {
    overflow-y: auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    -webkit-overflow-scrolling: touch;
}

.at-mention-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    cursor: pointer;
    transition: background-color 0.15s ease;
    user-select: none;
}

.at-mention-item:hover {
    background: rgba(0, 136, 204, 0.1);
}

.at-mention-avatar {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--line-color);
    flex-shrink: 0;
}

.at-mention-name {
    font-size: 13px;
    color: var(--title-color);
    font-weight: 500;
}

/* ==========================================
  31. 一键已读确认弹窗样式
========================================== */
.confirm-dialog-box {
    background: var(--card-bg);
    width: 85%;
    max-width: 320px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    overflow: hidden;
    border: 1px solid var(--line-color);
    animation: commentPopIn 0.2s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

body.dark-mode .confirm-dialog-box {
    background: #242426;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.6);
}

.confirm-dialog-content {
    padding: 24px 20px 20px 20px;
    text-align: center;
}

.confirm-dialog-title {
    margin: 0 0 8px 0;
    font-size: 18px;
    font-weight: 700;
    color: var(--title-color);
}

.confirm-dialog-desc {
    margin: 0;
    font-size: 14px;
    color: var(--date-color);
    line-height: 1.5;
}

.confirm-dialog-actions {
    display: flex;
    border-top: 1px solid var(--line-color);
}

body.dark-mode .confirm-dialog-actions {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.confirm-dialog-btn {
    flex: 1;
    padding: 14px 0;
    background: transparent;
    border: none;
    font-size: 16px;
    font-family: inherit;
    cursor: pointer;
    transition: background-color 0.15s ease;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.confirm-dialog-btn:first-child {
    border-right: 1px solid var(--line-color);
}

body.dark-mode .confirm-dialog-btn:first-child {
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.confirm-dialog-btn.cancel-btn {
    color: var(--text-color);
}

body.dark-mode .confirm-dialog-btn.cancel-btn {
    color: #ffffff;
}

.confirm-dialog-btn.confirm-btn {
    color: #ff4d4f;
    font-weight: 600;
}

.confirm-dialog-btn:active {
    background-color: rgba(125, 125, 125, 0.1);
}

/* ==========================================
  32. 消息列表滑动交互与右键菜单
========================================== */
.notice-item-wrapper {
    position: relative;
    border-radius: 10px;
    user-select: none;
    -webkit-user-select: none;
    background: transparent;
    flex-shrink: 0;
    width: 100%;
    box-sizing: border-box;
}

/* 仅在横向手势触发滑动过程中启用溢出裁切，避免静态与悬浮时底边被裁切 */
.notice-item-wrapper.swiping {
    overflow: hidden;
}

/* 滑动底层背景与操作指示 */
.notice-swipe-bg {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    padding: 0 20px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 600;
    color: #ffffff;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    transition: background-color 0.2s ease, opacity 0.2s ease, visibility 0.2s ease;
}

.notice-swipe-bg.active {
    opacity: 1;
    visibility: visible;
}

/* 左滑已读：墨绿色 */
.notice-swipe-bg.swipe-read {
    background-color: #2e7d32;
    justify-content: flex-end;
}

/* 右滑未读：蓝色 */
.notice-swipe-bg.swipe-unread {
    background-color: #1976d2;
    justify-content: flex-start;
}

.notice-swipe-content {
    display: flex;
    align-items: center;
    gap: 8px;
    transform: scale(0.85);
    opacity: 0.6;
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.2s ease;
}

/* 达到滑动阈值时图标放大高亮 */
.notice-swipe-bg.swipe-ready .notice-swipe-content {
    transform: scale(1.1);
    opacity: 1;
}

.notice-item {
    position: relative;
    z-index: 2;
    background: var(--bg-color);
    border: 1px solid var(--line-color);
    border-radius: 10px;
    padding: 12px 14px;
    font-size: 13px;
    cursor: pointer;
    transition: border-color 0.2s ease, background-color 0.2s ease, opacity 0.2s ease;
    width: 100%;
    box-sizing: border-box;
}

.notice-item.is-unread {
    border-left: 3px solid #ff4d4f;
    background: var(--card-bg);
}

.notice-item.is-read {
    opacity: 0.6;
}

/* 鼠标悬停及触屏按压时恢复完全不透明，并确保完整四周边框高亮 */
.notice-item:hover,
.notice-item:active {
    border-color: #0088cc;
    background: rgba(0, 136, 204, 0.05);
    opacity: 1;
}

/* 网页端右键菜单 */
.notice-context-menu {
    position: fixed;
    z-index: 3500;
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    border-radius: 10px;
    padding: 4px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16);
    animation: commentPopIn 0.15s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

body.dark-mode .notice-context-menu {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
}

.notice-context-menu-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    font-size: 13px;
    color: var(--text-color);
    border-radius: 6px;
    cursor: pointer;
    user-select: none;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.notice-context-menu-item:hover {
    background: rgba(0, 136, 204, 0.1);
    color: #0088cc;
}

/* ==========================================
   33. 评论区未读与视口组件
========================================== */
/* 单次会话固化未读分割线 */
.comment-unread-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    margin: 14px 0;
    position: relative;
    user-select: none;
    -webkit-user-select: none;
}

.comment-unread-divider::before {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    height: 1px;
    background-color: var(--line-color);
    z-index: 1;
}

.comment-unread-divider span {
    position: relative;
    z-index: 2;
    background-color: var(--card-bg);
    color: #ff4d4f;
    font-size: 11px;
    font-weight: 600;
    padding: 3px 14px;
    border-radius: 12px;
    border: 1px solid rgba(255, 77, 79, 0.25);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
}

body.dark-mode .comment-unread-divider span {
    background-color: #242426;
    border-color: rgba(255, 77, 79, 0.35);
    color: #ff7875;
}

/* 浮动操作按钮通用（外层固定定位 + 纯 GPU 属性过渡，根除回流跳动） */
.comment-float-btn {
    position: fixed;
    right: max(22px, calc(18px + env(safe-area-inset-right, 0px)), calc(50% - 400px + 22px));
    bottom: calc(96px + env(safe-area-inset-bottom, 0px));
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--line-color);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    display: flex !important;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 2100;
    user-select: none;
    opacity: 1;
    pointer-events: auto;
    transform: translate3d(0, 0, 0) scale(1);
    will-change: transform, opacity;
    transition: transform 0.28s cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 0.22s ease,
                border-color 0.2s ease,
                color 0.2s ease;
}

.comment-float-btn.hidden {
    display: flex !important;
    opacity: 0;
    pointer-events: none;
    transform: translate3d(0, 14px, 0) scale(0.85);
    transition: transform 0.2s ease-in,
                opacity 0.18s ease-in;
}

.comment-float-btn:hover {
    transform: translate3d(0, -2px, 0) scale(1.05);
    border-color: #0088cc;
    color: #0088cc;
}

/* 下拉未读数字气泡 */
.comment-float-badge {
    position: absolute;
    top: -6px;
    right: -6px;
    background: #0088cc;
    color: #ffffff;
    font-size: 10px;
    font-weight: 700;
    min-width: 18px;
    height: 18px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 5px;
    box-sizing: border-box;
    box-shadow: 0 2px 6px rgba(0, 136, 204, 0.4);
}

/* 原位返回记忆按钮 */
.comment-return-btn {
    bottom: calc(142px + env(safe-area-inset-bottom, 0px));
    width: auto;
    padding: 0 12px;
    height: 32px;
    border-radius: 16px;
    font-size: 12px;
    gap: 6px;
    background: rgba(0, 136, 204, 0.92);
    color: #ffffff;
    border: none;
    box-shadow: 0 4px 14px rgba(0, 136, 204, 0.35);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.comment-return-btn:hover {
    background: #0077b3;
    color: #ffffff;
    transform: translateY(-2px);
}

body.dark-mode .comment-float-btn {
    background: #28282a;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.45);
}

/* ==========================================
   34. 评论多选撤回小方块与操作栏
========================================== */
.comment-batch-check-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    align-self: center;
    flex-shrink: 0;
    cursor: pointer;
    user-select: none;
    padding: 4px;
}

.comment-batch-square {
    width: 18px;
    height: 18px;
    border: 2px solid var(--line-color);
    border-radius: 4px;
    background: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
    box-sizing: border-box;
}

.comment-msg-item.batch-selected .comment-batch-square {
    background: #0088cc;
    border-color: #0088cc;
}

.comment-msg-item.batch-selected .comment-batch-square::after {
    content: '';
    width: 4px;
    height: 8px;
    border: solid #ffffff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    margin-bottom: 2px;
}

.comment-batch-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px calc(10px + env(safe-area-inset-bottom, 0px));
    background: var(--card-bg);
    border-top: 1px solid var(--line-color);
    border-radius: 16px 16px 0 0;
    box-sizing: border-box;
    width: 100%;
    max-width: 800px;
    animation: commentPopIn 0.25s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

body.is-batch-selecting-comments .comment-msg-item.is-self {
    cursor: pointer;
}

/* ==========================================
   35. 网页端 App 下载二维码与说明卡片
========================================== */
.web-qr-download-card {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--bg-color);
    border: 1px solid var(--line-color);
    border-radius: 12px;
    padding: 14px 16px;
    margin-top: 12px;
    box-sizing: border-box;
}

.web-qr-code-wrapper {
    flex-shrink: 0;
    padding: 4px;
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
}

.web-qr-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
    text-align: left;
}

.web-qr-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--title-color);
}

.web-qr-desc {
    font-size: 12px;
    color: var(--date-color);
    line-height: 1.5;
}

.web-direct-download-btn {
    text-decoration: none;
    padding: 6px 14px !important;
    font-size: 12px !important;
    width: fit-content !important;
    border-radius: 6px !important;
    margin-top: 4px;
}

@media (max-width: 600px) {
    .web-qr-download-card {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }
    .web-qr-info {
        align-items: center;
        text-align: center;
    }
}

/* ==========================================
   36. APP 端“我的”反馈选择框与提示样式
========================================== */
.contrib-select-grid {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 8px;
}

.contrib-select-chip {
    background: var(--bg-color);
    border: 1px solid var(--line-color);
    color: var(--text-color);
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s ease;
    user-select: none;
    box-sizing: border-box;
    width: 100%;
}

.contrib-select-chip:hover {
    background: rgba(0, 136, 204, 0.06);
    border-color: #0088cc;
}

.contrib-select-chip.selected {
    background: rgba(0, 136, 204, 0.12);
    border-color: #0088cc;
    color: #0088cc;
    font-weight: bold;
}

.contrib-guide-hint {
    background: rgba(250, 140, 22, 0.08);
    border: 1px dashed rgba(250, 140, 22, 0.4);
    color: var(--title-color);
    border-radius: 10px;
    padding: 14px 16px;
    font-size: 14px;
    line-height: 1.6;
    margin-top: 8px;
    box-sizing: border-box;
}

.sub-card-tag.project_feedback {
    background: #722ed1;
}

/* ==========================================
   37. 评论未读新消息数量胶囊标签
========================================== */
.comment-unread-pill {
    background: #ff4d4f;
    color: #ffffff;
    font-size: 10px;
    font-weight: 700;
    padding: 1px 7px;
    border-radius: 10px;
    line-height: 1.3;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 1px 4px rgba(255, 77, 79, 0.4);
    animation: commentPopIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

/* ==========================================
   38. 密码框与眼睛显隐按钮
========================================== */
.password-input-wrapper {
    position: relative;
    width: 100%;
    display: flex;
    align-items: center;
}

.password-input-wrapper input {
    width: 100%;
    padding-right: 44px !important;
    margin-bottom: 0 !important;
    box-sizing: border-box;
}

.toggle-password-btn {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 44px;
    height: 100%;
    background: transparent;
    border: none;
    padding: 0;
    margin: 0;
    cursor: pointer;
    color: var(--date-color);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 5;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    transition: color 0.2s ease;
}

.toggle-password-btn svg {
    pointer-events: none;
    flex-shrink: 0;
}

.toggle-password-btn:hover {
    color: var(--title-color);
}

.toggle-password-btn:active {
    opacity: 0.7;
}

/* ==========================================
   39. 缩略图滚动滑槽手势区域与穿透防护
========================================== */
.modal-thumbs-track {
    touch-action: pan-y;
    overscroll-behavior: contain;
}

@media (max-width: 768px) {
    .modal-thumbs-track {
        touch-action: pan-x !important;
        overscroll-behavior: contain;
    }
}

/* ==========================================
   40. 缩略图滑动细进度条 (双端自适应)
========================================== */
.modal-thumbs-progress {
    position: absolute;
    right: 2px;
    top: 60px;
    bottom: 12px;
    width: 3px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 30;
}

.modal-thumbs-progress.active {
    opacity: 1;
}

.modal-thumbs-progress-thumb {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    background: #0088cc;
    border-radius: 2px;
    box-shadow: 0 0 6px rgba(0, 136, 204, 0.7);
    will-change: transform, height;
}

/* 移动端/窄屏：横向贴底极细进度条 */
@media (max-width: 768px) {
    .modal-thumbs-progress {
        top: auto;
        left: 14px;
        right: 14px;
        bottom: 2px;
        width: auto;
        height: 2.5px;
    }

    .modal-thumbs-progress-thumb {
        top: 0;
        left: 0;
        height: 100%;
        width: 24px;
        box-shadow: 0 0 6px rgba(0, 136, 204, 0.8);
        will-change: transform, width;
    }
}

/* ==========================================
   41. App 端滚动条与进度条主题适配与滑动渐隐
========================================== */
body.is-app * {
    scrollbar-width: none !important;
}

body.is-app ::-webkit-scrollbar {
    width: 4px !important;
    height: 4px !important;
}

body.is-app ::-webkit-scrollbar-track {
    background: transparent !important;
}

body.is-app ::-webkit-scrollbar-thumb {
    background: transparent !important;
    border-radius: 4px !important;
    transition: background-color 0.35s ease !important;
}

/* 滑动时高亮显现：浅色模式半透明黑，深色模式半透明白 */
body.is-app.is-scrolling ::-webkit-scrollbar-thumb,
body.is-app .is-scrolling::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.28) !important;
}

body.is-app.dark-mode.is-scrolling ::-webkit-scrollbar-thumb,
body.is-app.dark-mode .is-scrolling::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.32) !important;
}

/* 消息列表在 App 端移除强制定制底色滑槽，融入通用渐隐滚动 */
body.is-app .notice-list-container {
    overflow-y: auto !important;
}

body.is-app .notice-list-container::-webkit-scrollbar {
    width: 4px !important;
}

body.is-app .notice-list-container::-webkit-scrollbar-track {
    background: transparent !important;
}

/* 大图缩略图细进度条主题适配 */
.modal-thumbs-progress {
    background: rgba(0, 0, 0, 0.15);
}

body.dark-mode .modal-thumbs-progress {
    background: rgba(255, 255, 255, 0.18);
}

body.dark-mode .modal-thumbs-progress-thumb {
    background: #40a9ff;
    box-shadow: 0 0 6px rgba(64, 169, 255, 0.8);
}
/* 后台列表分页条（跟随主题） */
.admin-pager { display:flex; justify-content:center; margin: 12px 0; }
.admin-pager-inner { display:flex; align-items:center; gap:10px; font-size:12px; color: var(--date-color); flex-wrap: wrap; justify-content:center; }
.admin-pager .btn-outline { font-size:12px; padding:4px 12px; }
.admin-pager .btn-outline:disabled { opacity:.45; cursor:not-allowed; }

/* 通知列表分页条（跟随主题） */
.notice-pager { display:flex; justify-content:center; align-items:center; gap:10px; padding: 10px 0 4px; font-size:12px; color: var(--date-color); flex-wrap: wrap; }
.notice-pager .btn-outline { font-size:12px; padding:4px 12px; }
.notice-pager .btn-outline:disabled { opacity:.45; cursor:not-allowed; }

/* 尊重系统“减少动态效果”偏好 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

/* ==========================================
   42. 封面展示页与登录弹窗 (未登录首屏)
========================================== */
.welcome-screen {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    background-color: var(--bg-color);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    z-index: 50;
    overflow: hidden;
    box-sizing: border-box;
    padding: max(40px, calc(25px + env(safe-area-inset-top, 0px))) 20px 0 20px;
    user-select: none;
    -webkit-user-select: none;
}

.welcome-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-top: auto;
    margin-bottom: auto;
    z-index: 10;
    max-width: 600px;
}

/* 顶部极简药丸徽标 */
.welcome-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    border-radius: 20px;
    background: rgba(125, 125, 125, 0.08);
    border: 1px solid var(--line-color);
    color: var(--date-color);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
}

.welcome-badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #ff4d4f;
    box-shadow: 0 0 6px rgba(255, 77, 79, 0.6);
}

/* 主标题 */
.welcome-title {
    font-size: 38px;
    font-weight: 800;
    color: var(--title-color);
    letter-spacing: -0.5px;
    margin: 0 0 10px 0;
    line-height: 1.25;
}

/* 副标题 */
.welcome-subtitle {
    font-size: 15px;
    color: var(--date-color);
    margin: 0 0 26px 0;
    font-weight: 500;
    letter-spacing: 0.3px;
}

/* 开启回忆黑白高级胶囊按钮 */
.welcome-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 36px;
    border-radius: 30px;
    background: var(--title-color);
    color: var(--bg-color);
    font-size: 15px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.12);
    transition: transform 0.2s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.2s ease, opacity 0.2s ease;
    text-decoration: none;
}

.welcome-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 26px rgba(0, 0, 0, 0.18);
    opacity: 0.94;
}

.welcome-btn:active {
    transform: scale(0.95);
}

/* 底部扇形错落卡片容器 */
.welcome-cards-container {
    position: relative;
    width: 100%;
    height: 250px;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    overflow: hidden;
    pointer-events: none;
    margin-top: auto;
}

/* 单张卡片基础样式 */
.welcome-card-item {
    position: absolute;
    bottom: -35px;
    width: 150px;
    height: 210px;
    border-radius: 14px;
    overflow: hidden;
    background: var(--card-bg);
    border: 3px solid #ffffff;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.16);
    transition: transform 0.35s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.3s ease;
    transform-origin: bottom center;
    pointer-events: auto;
    cursor: pointer;
}

body.dark-mode .welcome-card-item {
    border: 3px solid rgba(255, 255, 255, 0.16);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.5);
}

.welcome-card-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    user-select: none;
    -webkit-user-drag: none;
}

/* 桌面端 5 张卡片扇形交错层叠 */
.card-pos-1 { transform: translateX(-240px) translateY(38px) rotate(-16deg); z-index: 1; }
.card-pos-2 { transform: translateX(-120px) translateY(14px) rotate(-8deg); z-index: 2; }
.card-pos-3 { transform: translateX(0px) translateY(-5px) rotate(1deg); z-index: 3; }
.card-pos-4 { transform: translateX(120px) translateY(12px) rotate(9deg); z-index: 2; }
.card-pos-5 { transform: translateX(240px) translateY(35px) rotate(17deg); z-index: 1; }

.welcome-card-item:hover {
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.25);
    z-index: 10 !important;
}
.card-pos-1:hover { transform: translateX(-240px) translateY(15px) rotate(-14deg) scale(1.04); }
.card-pos-2:hover { transform: translateX(-120px) translateY(-6px) rotate(-6deg) scale(1.04); }
.card-pos-3:hover { transform: translateX(0px) translateY(-22px) rotate(0deg) scale(1.04); }
.card-pos-4:hover { transform: translateX(120px) translateY(-8px) rotate(7deg) scale(1.04); }
.card-pos-5:hover { transform: translateX(240px) translateY(12px) rotate(15deg) scale(1.04); }

/* 登录模态遮罩与卡片弹窗 */
.login-modal {
    background-color: rgba(0, 0, 0, 0.5) !important;
    backdrop-filter: blur(8px) !important;
    -webkit-backdrop-filter: blur(8px) !important;
    z-index: 2000 !important;
    justify-content: flex-start !important;
    overflow-y: auto !important;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    padding: max(48px, calc(20px + env(safe-area-inset-top, 0px))) 16px max(24px, calc(16px + env(safe-area-inset-bottom, 0px))) 16px !important;
    box-sizing: border-box !important;
}

.login-modal .login-container {
    position: relative;
    margin: auto !important;
    flex-shrink: 0;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
    border: 1px solid var(--line-color);
    animation: commentPopIn 0.25s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

.close-login-btn {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.05);
    border: none;
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

body.dark-mode .close-login-btn {
    background: rgba(255, 255, 255, 0.1);
}

.close-login-btn:hover {
    color: #ff4d4f;
    background: rgba(255, 77, 79, 0.12);
    transform: scale(1.08);
}

.close-login-btn:active {
    transform: scale(0.92);
}

/* 移动端屏幕适配 */
@media (max-width: 768px) {
    .welcome-title {
        font-size: 28px;
    }
    .welcome-subtitle {
        font-size: 14px;
        margin-bottom: 22px;
    }
    .welcome-btn {
        padding: 11px 30px;
        font-size: 14px;
    }
    .welcome-cards-container {
        height: 180px;
    }
    .welcome-card-item {
        width: 105px;
        height: 145px;
        bottom: -25px;
        border-radius: 10px;
    }
    .card-pos-1 { transform: translateX(-145px) translateY(28px) rotate(-16deg); }
    .card-pos-2 { transform: translateX(-72px) translateY(10px) rotate(-8deg); }
    .card-pos-3 { transform: translateX(0px) translateY(-3px) rotate(1deg); }
    .card-pos-4 { transform: translateX(72px) translateY(8px) rotate(8deg); }
    .card-pos-5 { transform: translateX(145px) translateY(26px) rotate(16deg); }

    .card-pos-1:hover { transform: translateX(-145px) translateY(12px) rotate(-14deg); }
    .card-pos-2:hover { transform: translateX(-72px) translateY(-4px) rotate(-6deg); }
    .card-pos-3:hover { transform: translateX(0px) translateY(-15px) rotate(0deg); }
    .card-pos-4:hover { transform: translateX(72px) translateY(-5px) rotate(7deg); }
    .card-pos-5:hover { transform: translateX(145px) translateY(10px) rotate(15deg); }
}

/* 桌面端未登录时隐藏左侧侧边栏并撑开视口 */
body:has(#welcome-screen:not(.hidden)):not(.is-app) {
    padding: 0 !important;
}
body:has(#welcome-screen:not(.hidden)) .web-sidebar {
    display: none !important;
}
/* 旧 WebView 的类选择器兜底（由 app-core.js 维护 welcome-active） */
body.welcome-active:not(.is-app) {
    padding: 0 !important;
}
body.welcome-active .web-sidebar {
    display: none !important;
}
/* ==========================================
   封面页管理（后台 5 张封面槽位）
========================================== */
.cover-slots-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 14px;
}

.cover-slot {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 10px;
    border: 1px solid var(--line-color);
    border-radius: 10px;
    background: var(--card-bg);
}

.cover-slot.is-empty {
    border-style: dashed;
}

.cover-slot-preview {
    width: 100%;
    height: 110px;
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.cover-slot-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.cover-slot-empty {
    font-size: 12px;
    color: var(--date-color);
}

.cover-slot-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--title-color);
}

.cover-slot-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

/* ==========================================
   平板 / 宽屏横屏：回忆视图去除移动端底部导航留白
   （覆盖上方 body:has(#memories-view.active) 的 58px padding-bottom）
========================================== */
@media (min-width: 1025px) and (min-height: 540px) {
    body.memories-active {
        padding-bottom: 0 !important;
    }
}
/* ==========================================
   平板端（App 与网页端同步）字号协调放大与旋转过渡遮罩
========================================== */
.orientation-transition-mask {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-color);
    z-index: 9998;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity 0.25s ease;
    pointer-events: auto;
    user-select: none;
    -webkit-user-select: none;
}

.orientation-transition-mask.fade-out {
    opacity: 0;
    pointer-events: none;
}

.orientation-mask-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    animation: commentPopIn 0.2s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

.orientation-mask-logo {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    object-fit: cover;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

/* 平板竖屏（769px ~ 1024px）：放大回忆子页签标题与底部五栏导航文字 */
@media (min-width: 769px) and (max-width: 1024px) {
    .memories-sub-header {
        height: 60px !important;
        min-height: 60px !important;
        padding: 10px 0 8px 0 !important;
    }

    .sub-tab-items-left {
        gap: 26px;
    }

    .sub-tab-item {
        font-size: 20px !important;
        padding-bottom: 8px !important;
    }

    .bottom-nav {
        padding: 8px 16px calc(8px + env(safe-area-inset-bottom, 0px)) 16px;
    }

    .bottom-nav .nav-item {
        font-size: 13px !important;
        gap: 4px;
        padding: 7px 0;
    }

    .bottom-nav .nav-item svg {
        width: 22px;
        height: 22px;
    }
}

/* 平板横竖屏及桌面宽屏（>= 769px）：同步放大班级相册内部年份标题 */
@media (min-width: 769px) {
    .photo-wall-year-title {
        font-size: 20px !important;
        margin-bottom: 14px !important;
    }
}
/* ==========================================
   视觉美化升级：全站柔和渐变底蕴 / 年月静态渐变细边框 / 纤细慢速主干线 / 优玖空状态徽标
========================================== */

/* 1. 四大主页面及其子页面统一红蓝渐变背景（亮色模式适度加深；置于顶层 pointer-events:none 穿透叠印，使顶部标题栏、吸顶栏与页面背景 100% 浑然一体零色差） */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 200;
    background:
        radial-gradient(circle at 8% 12%, rgba(255, 90, 95, 0.13) 0%, transparent 48%),
        radial-gradient(circle at 92% 16%, rgba(0, 136, 204, 0.12) 0%, transparent 48%),
        radial-gradient(circle at 12% 88%, rgba(0, 136, 204, 0.10) 0%, transparent 48%),
        radial-gradient(circle at 88% 86%, rgba(255, 90, 95, 0.11) 0%, transparent 48%);
}

body.dark-mode::after {
    background:
        radial-gradient(circle at 8% 12%, rgba(255, 107, 112, 0.085) 0%, transparent 46%),
        radial-gradient(circle at 92% 16%, rgba(64, 169, 255, 0.09) 0%, transparent 46%),
        radial-gradient(circle at 12% 88%, rgba(64, 169, 255, 0.07) 0%, transparent 46%),
        radial-gradient(circle at 88% 86%, rgba(255, 107, 112, 0.075) 0%, transparent 46%);
}

#main-content,
#admin-panel {
    position: relative;
    z-index: 1;
}

#admin-panel {
    margin-left: auto;
    margin-right: auto;
}

/* 顶部搜索栏提升层级与高度余量，防止底部边缘被下方子页签栏遮挡 */
.memories-top-bar {
    position: relative;
    z-index: 101;
    max-height: 68px;
}

/* 顶部标题栏与整页背景颜色严格一致，底边统一细边框（移除向上延伸的负向阴影，防止遮挡上方头像与搜索框底部） */
.memories-sub-header {
    background-color: var(--bg-color) !important;
    background-image: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    border-bottom: 1px solid var(--line-color) !important;
    box-shadow: none !important;
}

/* 年份吸顶栏：无边框，与整页背景完全融合，上下实色延伸防止滚动文字漏出 */
.year-marker {
    background-color: var(--bg-color) !important;
    background-image: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    border: none !important;
    border-radius: 0 !important;
    margin-bottom: 4px !important;
    box-shadow: 0 -12px 0 0 var(--bg-color), 0 6px 0 0 var(--bg-color);
}

/* 月份吸顶栏：无边框，与整页背景完全融合，上下适度实色延伸防止滚动文字漏出，底部预留安全间距避免遮挡首张卡片高亮顶边框 */
.month-marker {
    background-color: var(--bg-color) !important;
    background-image: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    border: none !important;
    border-radius: 0 !important;
    margin-top: 4px !important;
    margin-bottom: 10px !important;
    box-shadow: 0 -12px 0 0 var(--bg-color), 0 2px 0 0 var(--bg-color);
}

/* 深色模式下导航选中项、主题切换激活按钮及子页签指示条统一为亮蓝色调，保留退出登录为警示红 */
body.dark-mode .web-sidebar-nav .nav-item.active {
    color: #40a9ff !important;
    background: rgba(64, 169, 255, 0.14) !important;
}

body.dark-mode .bottom-nav .nav-item.active {
    color: #40a9ff !important;
}

body.dark-mode .theme-switcher-modal .theme-btn.active {
    border-color: #40a9ff !important;
    color: #40a9ff !important;
    background: rgba(64, 169, 255, 0.14) !important;
}

body.dark-mode .sub-tab-indicator {
    background: #40a9ff !important;
}

/* 消息通知弹窗移除常驻滑道，统一接入滚动时显现机制 */
.notice-list-container {
    overflow-y: auto !important;
    scrollbar-color: transparent transparent !important;
}
.notice-list-container.is-scrolling {
    scrollbar-color: rgba(255, 90, 95, 0.45) transparent !important;
}
body.dark-mode .notice-list-container.is-scrolling {
    scrollbar-color: rgba(64, 169, 255, 0.5) transparent !important;
}
.notice-list-container::-webkit-scrollbar-track {
    background: transparent !important;
}
.notice-list-container:not(.is-scrolling)::-webkit-scrollbar-thumb {
    background: transparent !important;
}

/* 2. 首页三宫格玻璃拟态统计看板与优玖空状态徽标 */
.otd-stats-bar {
    display: grid !important;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px !important;
    width: 100%;
    max-width: 560px;
    margin: 14px 0 6px 0 !important;
}

.otd-stats-bar .stat-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    padding: 12px 8px !important;
    border-radius: 14px !important;
    background: var(--card-bg) !important;
    border: 1px solid var(--line-color) !important;
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.otd-stats-bar .stat-badge:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 90, 95, 0.35) !important;
}

body.dark-mode .otd-stats-bar .stat-badge:hover {
    border-color: rgba(64, 169, 255, 0.4) !important;
}

.otd-stats-bar .stat-num {
    font-size: 20px;
    font-weight: 800;
    color: var(--title-color);
    line-height: 1.15;
    font-variant-numeric: tabular-nums;
}

.otd-stats-bar .stat-label {
    font-size: 12px;
    color: var(--date-color);
    font-weight: 500;
}

.otd-empty-u9-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.otd-empty-u9-logo {
    width: 52px;
    height: 52px;
    border-radius: 13px;
    object-fit: cover;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--line-color);
}

/* 3. 时间轴线：整月连贯主干线（变细为 1.5px、红蓝与过渡色彩变淡、流动速度明显放慢至 14s） */
.timeline::before,
.timeline-item::before {
    display: none !important;
}

@keyframes timelineFlowAnim {
    0% { background-position: 0% 0%; }
    100% { background-position: 0% 200%; }
}

.month-events-group {
    position: relative;
    margin-bottom: 10px;
}

.month-events-group::before {
    content: '';
    position: absolute;
    left: -19px;
    top: 12px;
    bottom: 12px;
    width: 1.5px;
    border-radius: 2px;
    background: linear-gradient(
        180deg,
        rgba(255, 90, 95, 0.42) 0%,
        rgba(148, 128, 175, 0.32) 25%,
        rgba(0, 136, 204, 0.42) 50%,
        rgba(148, 128, 175, 0.32) 75%,
        rgba(255, 90, 95, 0.42) 100%
    );
    background-size: 100% 200%;
    animation: timelineFlowAnim 14s linear infinite;
    z-index: 0;
}

/* 跳转滚动或子页签滑动期间暂停大量月份渐变流动，避免滚动/合成层持续重绘 */
body.timeline-jumping .month-events-group::before,
body.memories-tab-switching .month-events-group::before {
    animation: none !important;
}

/* 非时间轴页签隐藏时停止流光动画，避免后台持续合成 */
#memories-timeline-panel:not(.active) .month-events-group::before {
    animation: none !important;
}

body.dark-mode .month-events-group::before {
    background: linear-gradient(
        180deg,
        rgba(64, 169, 255, 0.42) 0%,
        rgba(160, 135, 195, 0.30) 25%,
        rgba(255, 107, 112, 0.42) 50%,
        rgba(160, 135, 195, 0.30) 75%,
        rgba(64, 169, 255, 0.42) 100%
    );
    background-size: 100% 200%;
}

@media (max-width: 768px) {
    .month-events-group::before {
        left: -14px;
    }
}

.timeline-item {
    position: relative;
    margin-bottom: 18px !important;
}

.timeline-item .item-date {
    padding-top: 11px !important;
}

.timeline-item .event-main {
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    border-radius: 14px;
    padding: 13px 16px;
    box-shadow: var(--card-shadow);
    transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.timeline-item .event-main:hover {
    border-color: rgba(255, 90, 95, 0.32);
    box-shadow: 0 6px 22px rgba(22, 24, 29, 0.06);
}

body.dark-mode .timeline-item .event-main:hover {
    border-color: rgba(64, 169, 255, 0.38);
    box-shadow: 0 8px 26px rgba(0, 0, 0, 0.42);
}

.event-icon.red-dot {
    background: var(--accent-gradient) !important;
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.event-icon.triangle {
    fill: var(--accent-color) !important;
    filter: drop-shadow(0 0 3px var(--accent-soft));
}

/* 4. 时间轴主页面内联缩略图排布（最多 3 张图片，超出 3 张时在第 3 张右下角叠加黑白通吃的高对比度角标） */
.timeline-inline-thumbs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 92px));
    gap: 8px;
    margin-top: 10px;
    width: 100%;
    max-width: 292px;
    box-sizing: border-box;
}

.timeline-thumb-box {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: 10px;
    overflow: hidden;
    background: var(--bg-color);
    border: 1px solid var(--line-color);
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    box-sizing: border-box;
    transition: transform 0.2s cubic-bezier(0.25, 0.8, 0.25, 1), border-color 0.2s ease, box-shadow 0.2s ease;
}

.timeline-thumb-box:hover {
    transform: translateY(-2px);
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

body.dark-mode .timeline-thumb-box:hover {
    border-color: #40a9ff;
}

.timeline-thumb-box:active {
    transform: scale(0.95);
}

.timeline-thumb-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.timeline-thumb-box:hover .timeline-thumb-img {
    transform: scale(1.06);
}

/* 第 3 张图片右下角 +N 角标：深墨色毛玻璃底 + 半透明亮白内描边 + 暗色外投影，无论纯白底图或纯黑底图均清晰醒目 */
.timeline-thumb-corner-badge {
    position: absolute;
    right: 5px;
    bottom: 5px;
    z-index: 2;
    padding: 2px 7px;
    border-radius: 8px;
    background: rgba(15, 17, 22, 0.74);
    border: 1px solid rgba(255, 255, 255, 0.38);
    color: #ffffff;
    font-size: 11px;
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: 0.3px;
    font-variant-numeric: tabular-nums;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.45);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.8);
    pointer-events: none;
}

/* 最近搜索记录浮层菜单 */
.search-history-dropdown {
    position: fixed;
    z-index: 3580;
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    border-radius: 12px;
    padding: 8px 10px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.14);
    display: flex;
    flex-direction: column;
    gap: 4px;
    box-sizing: border-box;
    animation: commentPopIn 0.18s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

body.dark-mode .search-history-dropdown {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.48);
}

.search-history-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 2px 4px 6px 4px;
    border-bottom: 1px dashed var(--line-color);
    user-select: none;
}

.search-history-title {
    font-size: 11px;
    font-weight: 700;
    color: var(--date-color);
}

.search-history-clear-btn {
    background: none;
    border: none;
    padding: 2px 6px;
    font-size: 11px;
    font-weight: 600;
    color: var(--date-color);
    cursor: pointer;
    border-radius: 4px;
    transition: color 0.15s ease, background-color 0.15s ease;
}

.search-history-clear-btn:hover {
    color: #ff4d4f;
    background: rgba(255, 77, 79, 0.1);
}

.search-history-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.search-history-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 6px 6px 6px 8px;
    border-radius: 8px;
    cursor: pointer;
    user-select: none;
    transition: background-color 0.15s ease;
}

.search-history-item:hover {
    background: rgba(125, 125, 125, 0.1);
}

.search-history-text {
    flex: 1;
    min-width: 0;
    font-size: 13px;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.search-history-del-btn {
    background: none;
    border: none;
    color: var(--date-color);
    font-size: 16px;
    line-height: 1;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    padding: 0;
    transition: color 0.15s ease, background-color 0.15s ease;
}

.search-history-del-btn:hover {
    color: #ff4d4f;
    background: rgba(255, 77, 79, 0.12);
}

/* 5. 班级相册：移除缩略图发光边框，保留胶片时间戳与毛玻璃胶囊跳转按钮 */
.photo-wall-item {
    border-radius: 14px !important;
    background: var(--card-bg) !important;
    box-shadow: 0 6px 20px rgba(22, 24, 29, 0.06) !important;
    border: 1px solid var(--line-color);
}

body.dark-mode .photo-wall-item {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.42) !important;
    border-color: var(--line-color);
}

.photo-wall-caption {
    padding: 14px 12px 10px 12px !important;
    background: linear-gradient(to top, rgba(12, 14, 18, 0.78) 0%, rgba(12, 14, 18, 0.32) 60%, transparent 100%) !important;
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    z-index: 3;
}

.photo-wall-date {
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.6px;
    color: #ffd591;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.65);
    font-variant-numeric: tabular-nums;
}

.photo-wall-jump {
    text-decoration: none !important;
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.28);
    color: #ffffff;
    padding: 2px 9px;
    border-radius: 12px;
    font-size: 11px !important;
    font-weight: 600;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    transition: background-color 0.2s ease, transform 0.15s ease, color 0.2s ease;
}

.photo-wall-jump:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: #ffffff !important;
    transform: translateX(2px);
}

body.dark-mode .photo-wall-jump:hover {
    background: #40a9ff;
    border-color: #40a9ff;
}

/* 6. 个人资料弹窗：联系方式右侧轻量一键复制按钮 */
.profile-input-action-wrap {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    flex: 1;
    min-width: 0;
}

.profile-copy-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 6px;
    border: 1px solid var(--line-color);
    background: var(--card-bg);
    color: var(--date-color);
    cursor: pointer;
    flex-shrink: 0;
    padding: 0;
    transition: color 0.18s ease, border-color 0.18s ease, transform 0.15s ease, background-color 0.18s ease;
}

.profile-copy-btn:hover {
    color: #0088cc;
    border-color: #0088cc;
    background: rgba(0, 136, 204, 0.08);
}

.profile-copy-btn:active {
    transform: scale(0.9);
}

/* 7. 管理后台：顶部吸顶 5 大业务模块 Tab 导航栏 */
.admin-top-tabs {
    position: sticky;
    top: 10px;
    z-index: 95;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
    margin-bottom: 16px;
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    border-radius: 14px;
    box-shadow: 0 -16px 0 0 var(--bg-color), var(--card-shadow);
    overflow-x: auto;
    box-sizing: border-box;
}

.admin-tab-btn {
    flex: 1;
    min-width: max-content;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 9px 14px;
    border: 1px solid transparent;
    border-radius: 10px;
    background: transparent;
    color: var(--date-color);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.admin-tab-btn:hover {
    color: var(--title-color);
    background: rgba(125, 125, 125, 0.08);
}

.admin-tab-btn.active {
    background: var(--bg-color);
    color: var(--accent-color);
    border-color: rgba(255, 90, 95, 0.32);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    font-weight: 700;
}

body.dark-mode .admin-tab-btn.active {
    color: #40a9ff;
    border-color: rgba(64, 169, 255, 0.38);
}

.admin-tab-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: 10px;
    background: #ff4d4f;
    color: #ffffff;
    font-size: 11px;
    font-weight: 700;
    line-height: 1;
}

@media (max-width: 600px) {
    .otd-stats-bar {
        gap: 8px !important;
    }
    .otd-stats-bar .stat-badge {
        padding: 10px 4px !important;
    }
    .otd-stats-bar .stat-num {
        font-size: 17px;
    }
    .timeline-inline-thumbs {
        max-width: 100%;
        gap: 6px;
    }
}

/* ==========================================
   版本日志弹窗底部的安装包二维码
========================================== */
.changelog-qr-footer {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px dashed var(--line-color);
}

.changelog-qr-footer .web-qr-download-card {
    margin-top: 0;
    background: var(--card-bg);
}
/* ==========================================
   v1.5.0 性能优化与「班级互动（班级公告 / 你问我答 / 重逢集邮）」样式
========================================== */

/* 时间轴卡片不做 content-visibility 估算：卡片高度差较大，估算高度会让远距离跳转定位漂移，
   并迫使跳转时一次性展开全部卡片造成卡顿。照片墙仍保留按年视口隔离。 */

#memories-timeline .timeline-item {
    contain: layout style;
}

#memories-photo-wall .photo-wall-year {
    content-visibility: auto;
    contain-intrinsic-size: auto 360px;
}

/* 2. 互动视图与回忆视图共享锁屏定高与三卡槽滑轨容器 */
body:has(#interact-view.active) {
    height: 100vh !important;
    height: 100dvh !important;
    overflow: hidden !important;
    padding-bottom: calc(58px + env(safe-area-inset-bottom, 0px)) !important;
}

@media (min-width: 1025px) and (min-height: 540px) {
    body:has(#interact-view.active) {
        padding-bottom: 0 !important;
    }
}

#interact-view.active {
    display: flex !important;
    flex-direction: column !important;
    flex: 1 1 auto;
    height: 100%;
    max-height: 100%;
    min-height: 0;
    overflow: hidden !important;
    box-sizing: border-box;
}

.interact-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 12px;
    border-radius: 20px;
    background: var(--accent-gradient);
    color: #ffffff;
    border: none;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 3px 10px rgba(255, 90, 95, 0.28);
    transition: transform 0.18s ease, opacity 0.18s ease;
    flex-shrink: 0;
}

.interact-action-btn:hover {
    transform: translateY(-1px);
    opacity: 0.95;
}

.interact-action-btn:active {
    transform: scale(0.95);
}

.interact-empty-svg-wrap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 68px;
    height: 68px;
    border-radius: 50%;
    background: var(--accent-soft);
    color: var(--accent-color);
    margin-bottom: 12px;
}

body.dark-mode .interact-empty-svg-wrap {
    background: rgba(64, 169, 255, 0.14);
    color: #40a9ff;
}

/* 3. 班级公告卡片流 */
.announcements-list-container {
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding: 14px 2px 24px 2px;
}

.announcement-card {
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    border-radius: 16px;
    padding: 18px 20px;
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.announcement-card.is-pinned {
    border-color: rgba(255, 90, 95, 0.42);
    background: linear-gradient(180deg, rgba(255, 90, 95, 0.035) 0%, var(--card-bg) 48%);
}

body.dark-mode .announcement-card.is-pinned {
    border-color: rgba(64, 169, 255, 0.45);
    background: linear-gradient(180deg, rgba(64, 169, 255, 0.06) 0%, var(--card-bg) 48%);
}

.announcement-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 1px dashed var(--line-color);
}

.announcement-title-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    min-width: 0;
}

.announcement-pin-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: 8px;
    background: var(--accent-soft);
    color: var(--accent-color);
    font-size: 11px;
    font-weight: 700;
    flex-shrink: 0;
}

body.dark-mode .announcement-pin-badge {
    background: rgba(64, 169, 255, 0.16);
    color: #40a9ff;
}

.announcement-title {
    margin: 0;
    font-size: 16px;
    font-weight: 800;
    color: var(--title-color);
    line-height: 1.35;
}

.announcement-date {
    font-size: 12px;
    color: var(--date-color);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    white-space: nowrap;
    flex-shrink: 0;
    padding-top: 2px;
}

.announcement-content {
    font-size: 14px;
    color: var(--text-color);
    line-height: 1.7;
    white-space: pre-wrap;
    word-break: break-word;
}

/* 4. 重逢集邮：顶部横幅与仿真齿孔邮票网格 */
.stamps-intro-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 14px;
    margin-bottom: 16px;
    padding: 12px 16px;
    border-radius: 14px;
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    box-shadow: var(--card-shadow);
    flex-wrap: wrap;
}

.stamps-intro-left {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-color);
    flex: 1;
    min-width: 200px;
}

.stamps-intro-left svg {
    color: var(--accent-color);
    flex-shrink: 0;
}

.stamps-banner-btn {
    width: auto !important;
    padding: 7px 16px !important;
    font-size: 13px !important;
    border-radius: 20px !important;
    background: var(--accent-gradient) !important;
    flex-shrink: 0;
}

.reunion-stamps-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    align-items: start; /* 选项 5A：并排卡片各自按实际内容高度包裹，避免无寄语卡片被拉伸露出底部厚边框 */
    gap: 18px;
    padding-bottom: 28px;
}

@media (max-width: 680px) {
    .reunion-stamps-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

/* 复古航空信封 / 拍立得明信片外框（红蓝斜纹信封饰边 + 齿孔阴影质感） */
.reunion-stamp-card {
    position: relative;
    padding: 6px;
    border-radius: 12px;
    background: repeating-linear-gradient(
        -45deg,
        #d9363e 0px,
        #d9363e 10px,
        transparent 10px,
        transparent 18px,
        #1d6fa5 18px,
        #1d6fa5 28px,
        transparent 28px,
        transparent 36px
    );
    background-color: var(--card-bg);
    box-shadow: 0 8px 24px rgba(22, 24, 29, 0.09), 0 2px 6px rgba(22, 24, 29, 0.04);
    transition: transform 0.28s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.28s ease;
    box-sizing: border-box;
}

@keyframes stampHighlightPulse {
    0%, 100% { filter: drop-shadow(0 0 0 rgba(255, 77, 79, 0)); }
    28% { filter: drop-shadow(0 0 10px rgba(255, 77, 79, 0.72)); }
    68% { filter: drop-shadow(0 0 4px rgba(255, 77, 79, 0.32)); }
}

.reunion-stamp-card.highlight-flash {
    animation: stampHighlightPulse 3.2s ease;
}

.reunion-stamp-card.jump-arrival {
    animation: timelineJumpArrival 0.28s cubic-bezier(0.22, 0.8, 0.28, 1);
}

body.dark-mode .reunion-stamp-card {
    background: repeating-linear-gradient(
        -45deg,
        rgba(255, 107, 112, 0.72) 0px,
        rgba(255, 107, 112, 0.72) 10px,
        transparent 10px,
        transparent 18px,
        rgba(64, 169, 255, 0.72) 18px,
        rgba(64, 169, 255, 0.72) 28px,
        transparent 28px,
        transparent 36px
    );
    background-color: var(--card-bg);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.48);
}

.reunion-stamp-card:hover {
    transform: translateY(-4px) rotate(-0.3deg);
    box-shadow: 0 14px 32px rgba(22, 24, 29, 0.14);
}

body.dark-mode .reunion-stamp-card:hover {
    box-shadow: 0 14px 34px rgba(0, 0, 0, 0.62);
}

/* 拍立得暖白相纸内衬 */
.reunion-stamp-inner {
    background: #fdfbf7;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 8px;
    padding: 12px 14px 16px 14px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    position: relative;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.7);
}

body.dark-mode .reunion-stamp-inner {
    background: #1e2129;
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

/* 顶部航空邮政铭记栏 */
.stamp-airmail-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.2px;
    color: var(--date-color);
    padding: 0 2px 2px 2px;
    border-bottom: 1px dotted var(--line-color);
    user-select: none;
}

.stamp-airmail-brand {
    color: #c81e2b;
    opacity: 0.85;
}

body.dark-mode .stamp-airmail-brand {
    color: #ff7875;
}

.stamp-airmail-no {
    opacity: 0.75;
}

/* 照片舞台容器：允许骑缝章跨出照片底边 */
.stamp-photo-stage {
    position: relative;
    width: 100%;
    margin-bottom: 6px;
}

.stamp-photo-frame {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 3;
    border-radius: 4px;
    overflow: hidden;
    background: var(--bg-color);
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: inset 0 1px 4px rgba(0, 0, 0, 0.12);
}

body.dark-mode .stamp-photo-frame {
    border-color: rgba(255, 255, 255, 0.1);
}

.stamp-main-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    cursor: pointer;
    transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.stamp-photo-frame:hover .stamp-main-img {
    transform: scale(1.035);
}

/* 右下角骑缝朱砂红复古日戳（跨压照片底边与拍立得白边） */
.stamp-postmark {
    position: absolute;
    right: 8px;
    bottom: -18px;
    z-index: 4;
    pointer-events: none;
    display: inline-flex;
    align-items: center;
    color: #c41d24;
    transform: rotate(-12deg);
    filter: drop-shadow(0 2px 5px rgba(196, 29, 36, 0.18));
}

body.dark-mode .stamp-postmark {
    color: #ff6b70;
    filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.45));
}

.stamp-postmark-waves {
    margin-right: -5px;
    opacity: 0.82;
    flex-shrink: 0;
}

.stamp-postmark-ring {
    min-width: 72px;
    min-height: 72px;
    padding: 7px 9px;
    border-radius: 50%;
    border: 2.2px solid currentColor;
    outline: 1px solid currentColor;
    outline-offset: -5px;
    background: radial-gradient(circle, rgba(255, 248, 244, 0.92) 0%, rgba(255, 242, 236, 0.82) 100%);
    color: inherit;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    box-sizing: border-box;
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}

body.dark-mode .stamp-postmark-ring {
    background: radial-gradient(circle, rgba(32, 26, 30, 0.90) 0%, rgba(26, 22, 26, 0.82) 100%);
}

.stamp-postmark-star {
    font-size: 8px;
    font-weight: 800;
    letter-spacing: 1px;
    line-height: 1;
    opacity: 0.85;
    margin-bottom: 2px;
}

.stamp-postmark-loc {
    font-size: 11px;
    font-weight: 900;
    letter-spacing: 0.5px;
    line-height: 1.15;
    max-width: 76px;
    word-break: break-all;
}

.stamp-postmark-divider {
    width: 78%;
    height: 1px;
    background: currentColor;
    opacity: 0.65;
    margin: 2.5px 0;
}

.stamp-postmark-date {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 9.5px;
    font-weight: 800;
    letter-spacing: 0.2px;
    line-height: 1.1;
}

/* 拍立得底部留白签名与寄语区 */
.stamp-meta-body {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 4px;
}

.stamp-participants-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding-right: 78px; /* 避让右下角骑缝邮戳，防止挡住出镜同学名字 */
}

.stamp-person-pill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 9px 3px 4px;
    border-radius: 14px;
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    font-size: 12px;
    font-weight: 600;
    color: var(--title-color);
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
    transition: border-color 0.15s ease, transform 0.15s ease;
}

.stamp-person-pill:hover {
    border-color: #0088cc;
    transform: translateY(-1px);
}

.stamp-person-pill img {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    object-fit: cover;
}

.stamp-message-text {
    font-size: 13px;
    color: var(--text-color);
    font-style: italic;
    line-height: 1.55;
    padding-top: 8px;
    border-top: 1px dashed var(--line-color);
    word-break: break-word;
}

/* 5. 重逢集邮上传弹窗组件 */
.stamp-photo-upload-area {
    width: 100%;
    height: 160px;
    border: 1.5px dashed var(--line-color);
    border-radius: 12px;
    background: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    overflow: hidden;
    position: relative;
    transition: border-color 0.2s ease;
}

.stamp-photo-upload-area:hover {
    border-color: #0088cc;
}

.stamp-photo-preview {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.stamp-photo-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    color: var(--date-color);
    font-size: 13px;
}

.stamp-participants-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
    gap: 6px;
    max-height: 150px;
    overflow-y: auto;
    padding: 8px;
    border: 1px solid var(--line-color);
    border-radius: 10px;
    background: var(--bg-color);
}

.stamp-person-chip {
    padding: 5px 4px !important;
    font-size: 12px !important;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
/* ==========================================
   班级公告 Markdown 富文本与内嵌图片渲染样式
========================================== */
.announcement-markdown-body {
    font-size: 14px;
    color: var(--text-color);
    line-height: 1.72;
    word-break: break-word;
}

.announcement-markdown-body .ann-md-p {
    margin: 0 0 8px 0;
}

.announcement-markdown-body .ann-md-p:last-child {
    margin-bottom: 0;
}

.announcement-markdown-body .ann-md-heading {
    margin: 12px 0 6px 0;
    font-weight: 800;
    color: var(--title-color);
    line-height: 1.35;
}

.announcement-markdown-body h3.ann-md-heading { font-size: 16px; }
.announcement-markdown-body h4.ann-md-heading { font-size: 15px; }
.announcement-markdown-body h5.ann-md-heading,
.announcement-markdown-body h6.ann-md-heading { font-size: 14px; }

.announcement-markdown-body .ann-md-list {
    margin: 6px 0 10px 0;
    padding-left: 20px;
}

.announcement-markdown-body .ann-md-list li {
    margin: 3px 0;
}

.announcement-markdown-body .ann-md-quote {
    margin: 8px 0;
    padding: 8px 12px;
    border-left: 3px solid var(--accent-color);
    background: rgba(125, 125, 125, 0.06);
    border-radius: 0 8px 8px 0;
    color: var(--date-color);
    font-size: 13px;
}

body.dark-mode .announcement-markdown-body .ann-md-quote {
    border-left-color: #40a9ff;
}

.announcement-markdown-body .ann-md-pre {
    margin: 8px 0;
    padding: 10px 12px;
    border-radius: 8px;
    background: var(--bg-color);
    border: 1px solid var(--line-color);
    overflow-x: auto;
    font-size: 12px;
    line-height: 1.5;
}

.announcement-markdown-body .ann-md-hr {
    border: none;
    border-top: 1px dashed var(--line-color);
    margin: 12px 0;
}

.announcement-markdown-body a {
    color: #0066cc;
    text-decoration: underline;
    word-break: break-all;
}

body.dark-mode .announcement-markdown-body a {
    color: #40a9ff;
}

.announcement-markdown-body .ann-md-figure {
    margin: 10px 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
}

.announcement-markdown-body .ann-md-img {
    max-width: 100%;
    max-height: 340px;
    width: auto;
    height: auto;
    border-radius: 10px;
    border: 1px solid var(--line-color);
    object-fit: contain;
    cursor: zoom-in;
    background: var(--bg-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.announcement-markdown-body .ann-md-img:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
}

.announcement-markdown-body .ann-md-caption {
    font-size: 12px;
    color: var(--date-color);
}
/* ==========================================
   43. 你问我答（对话框样式 / 气泡排版 / 响应式适配）
========================================== */
.qa-intro-banner {
    background: var(--card-bg);
}

.qa-list-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding-bottom: 30px;
}

.qa-list-loading,
.qa-answers-loading,
.qa-answers-error,
.qa-answers-empty {
    text-align: center;
    color: var(--date-color);
    font-size: 13px;
    padding: 18px 8px;
}

.qa-load-error p {
    margin: 7px 0 12px;
    color: var(--date-color);
    font-size: 13px;
}

.qa-retry-btn {
    font-size: 12px;
    padding: 5px 14px;
}

.qa-pager,
.qa-answer-pager {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    color: var(--date-color);
    font-size: 12px;
    padding: 8px 0;
}

.qa-pager .btn-outline,
.qa-answer-pager .btn-outline {
    font-size: 12px;
    padding: 4px 12px;
}

.qa-pager .btn-outline:disabled,
.qa-answer-pager .btn-outline:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.qa-card {
    background: var(--card-bg);
    border: 1px solid var(--line-color);
    border-radius: 16px;
    padding: 16px 18px;
    box-shadow: var(--card-shadow);
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-sizing: border-box;
    width: 100%;
}

.qa-question-header {
    display: flex;
    align-items: center;
    gap: 10px;
}

.qa-question-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--line-color);
    flex-shrink: 0;
}

.qa-question-author-meta {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.qa-question-author {
    font-size: 14px;
    font-weight: 700;
    color: var(--title-color);
}

.qa-time {
    font-size: 11px;
    color: var(--date-color);
}

.qa-question-content {
    font-size: 15px;
    line-height: 1.6;
    color: var(--title-color);
    margin: 4px 0;
    word-break: break-word;
}

.qa-card-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    padding-top: 8px;
    border-top: 1px dashed var(--line-color);
}

.qa-item-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.qa-card-action-buttons {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    flex-wrap: wrap;
}

.qa-report-trigger-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 1px solid var(--line-color);
    background: transparent;
    color: var(--date-color);
    cursor: pointer;
    padding: 0;
    transition: all 0.2s ease;
}

.qa-report-trigger-btn:hover {
    color: #ff4d4f;
    border-color: #ff4d4f;
    background: rgba(255, 77, 79, 0.1);
}

/* 就地展开的回答输入栏 */
.qa-inline-reply-box {
    background: var(--bg-color);
    border: 1px solid var(--line-color);
    border-radius: 12px;
    padding: 10px 12px;
    margin-top: 6px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    box-sizing: border-box;
}

.qa-reply-textarea {
    width: 100%;
    border: 1px solid var(--line-color);
    border-radius: 8px;
    padding: 8px 10px;
    background: var(--card-bg);
    color: var(--text-color);
    font-size: 13px;
    font-family: inherit;
    resize: vertical;
    box-sizing: border-box;
    outline: none;
}

.qa-reply-textarea:focus {
    border-color: #0088cc;
}

.qa-reply-actions-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.qa-reply-submit-area {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.qa-reply-char-count {
    color: var(--date-color);
    font-size: 11px;
    white-space: nowrap;
}

/* 回答气泡列表 */
.qa-answers-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding-left: 12px;
    border-left: 2px solid var(--line-color);
    margin-top: 6px;
}

.qa-answer-item {
    background: var(--bg-color);
    border: 1px solid var(--line-color);
    border-radius: 12px;
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.qa-answer-header {
    display: flex;
    align-items: center;
    gap: 8px;
}

.qa-answer-avatar {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--line-color);
    flex-shrink: 0;
}

.qa-answer-author {
    font-size: 13px;
    font-weight: 600;
    color: var(--title-color);
    flex: 1;
}

.qa-answer-content {
    font-size: 14px;
    line-height: 1.55;
    color: var(--text-color);
    word-break: break-word;
}

.qa-jump-highlight {
    animation: qa-jump-highlight 1.1s ease-out 2;
}

.admin-qa-answer-items {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.admin-qa-answer-item {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 8px;
    padding: 7px 9px;
    border-radius: 7px;
    background: var(--bg-color);
    font-size: 12px;
}

.admin-qa-answer-content {
    flex: 1;
    min-width: 0;
    line-height: 1.5;
    overflow-wrap: anywhere;
}

.admin-qa-answer-author {
    color: var(--date-color);
}

.admin-qa-answer-item .btn-danger-small {
    flex-shrink: 0;
    padding: 1px 6px;
    font-size: 11px;
}

@keyframes qa-jump-highlight {
    0%, 100% { box-shadow: 0 0 0 0 rgba(0, 136, 204, 0); }
    35% { box-shadow: 0 0 0 4px rgba(0, 136, 204, 0.22); }
}

@media (max-width: 600px) {
    .qa-card {
        padding: 14px;
    }

    .qa-card-toolbar {
        align-items: flex-start;
    }

    .qa-card-action-buttons {
        width: 100%;
        justify-content: flex-start;
    }

    .qa-answers-list {
        padding-left: 8px;
    }

    .qa-reply-submit-area {
        width: 100%;
        justify-content: flex-end;
    }
}