/* ============================================
   紫金县凤安中学2026届九（1）班 · 管理后台
   设计：现代简约，与前台统一
   ============================================ */

:root {
    --bg: #FAFAF9;
    --surface: #FFFFFF;
    --text: #171717;
    --text-secondary: #6B7280;
    --text-tertiary: #9CA3AF;
    --border: #E8E8E4;
    --border-hover: #D4D4CF;
    --accent: #4F46E5;
    --accent-hover: #4338CA;
    --accent-subtle: #EEF2FF;
    --danger: #EF4444;
    --danger-hover: #DC2626;
    --success: #10B981;
    --bg-tertiary: #F3F4F6;
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 14px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
    --font: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
    --transition: 180ms ease;
    --sidebar-w: 230px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; }
button { cursor: pointer; border: none; font-family: inherit; font-size: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* ========== Lucide ========== */
.lucide { display: inline-block; vertical-align: middle; flex-shrink: 0; }

/* ========== Login ========== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface);
    background-image: radial-gradient(circle, var(--border) 1px, transparent 1px);
    background-size: 32px 32px;
}

.login-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 44px 40px;
    width: 400px;
    max-width: 90vw;
    box-shadow: var(--shadow-md);
}

.login-card .login-header {
    text-align: center;
    margin-bottom: 36px;
}

.login-card .login-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    background: var(--accent-subtle);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.login-card h1 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}

.login-card .subtitle {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.form-field { margin-bottom: 18px; }

.form-field label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-field input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    transition: all var(--transition);
    outline: none;
    background: var(--bg);
    color: var(--text);
}

.form-field input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-subtle);
    background: var(--surface);
}

.login-error {
    color: var(--danger);
    text-align: center;
    font-size: 0.85rem;
    margin-top: 12px;
    display: none;
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 10px 22px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition);
    letter-spacing: -0.01em;
}

.btn-block { width: 100%; }

.btn-primary { background: var(--text); color: #fff; }
.btn-primary:hover { background: #000; box-shadow: var(--shadow-md); }

.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-hover); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }

.btn-outline {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-outline:hover { border-color: var(--text); }

.btn-sm { padding: 5px 12px; font-size: 0.8rem; border-radius: var(--radius-sm); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ========== Layout ========== */
.admin-layout { display: flex; min-height: 100vh; }

.admin-sidebar {
    width: var(--sidebar-w);
    background: var(--text);
    color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-brand {
    padding: 24px 24px 20px;
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.sidebar-brand .accent { color: #818CF8; }

.sidebar-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 4px 12px;
    gap: 2px;
}

.sidebar-nav button {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    color: rgba(255,255,255,0.55);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    text-align: left;
    width: 100%;
    background: none;
}

.sidebar-nav button:hover { color: #fff; background: rgba(255,255,255,0.06); }
.sidebar-nav button.active { color: #fff; background: rgba(255,255,255,0.1); }

.sidebar-footer {
    padding: 12px;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar-footer .logout-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    color: rgba(255,255,255,0.45);
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    width: 100%;
    background: none;
}

.sidebar-footer .logout-btn:hover { color: #EF4444; background: rgba(239,68,68,0.1); }

/* ========== Main Content ========== */
.admin-main {
    flex: 1;
    margin-left: var(--sidebar-w);
    padding: 36px 40px;
    min-height: 100vh;
}

.page-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
    flex-wrap: wrap;
    gap: 16px;
}

.page-head h2 {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
}

.page-head .meta { font-size: 0.85rem; color: var(--text-tertiary); }

/* ========== Table ========== */
.table-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

table { width: 100%; border-collapse: collapse; }

th {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
}

td {
    padding: 12px 16px;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: #FAFBFC; }

td.empty-row {
    text-align: center;
    color: var(--text-tertiary);
    padding: 40px 16px;
}

td.empty-row:hover { background: transparent; }

.mini-img {
    width: 64px;
    height: 48px;
    object-fit: cover;
    border-radius: 4px;
}

.avatar-mini {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--accent-subtle);
}

.avatar-mini-placeholder {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.text-ellipsis {
    max-width: 240px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.actions-cell { display: flex; gap: 6px; }

/* ========== Modal ========== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s;
    backdrop-filter: blur(4px);
}

.modal-overlay.active { opacity: 1; pointer-events: auto; }

.modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    width: 520px;
    max-width: 92vw;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 20px 50px rgba(0,0,0,0.12);
}

.modal h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.modal .form-field { margin-bottom: 16px; }
.modal .form-field label { font-size: 0.8rem; }
.modal .form-field input,
.modal .form-field textarea,
.modal .form-field select {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    transition: all var(--transition);
    outline: none;
    background: var(--bg);
    color: var(--text);
}
.modal .form-field input:focus,
.modal .form-field textarea:focus,
.modal .form-field select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-subtle);
    background: var(--surface);
}
.modal .form-field textarea { min-height: 90px; resize: vertical; }
.modal .modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 24px; }

/* ========== Upload Progress ========== */
.upload-progress {
    margin-bottom: 20px;
    padding: 14px 16px;
    background: var(--accent-subtle);
    border-radius: var(--radius);
    border: 1px solid rgba(79, 70, 229, 0.15);
}

.upload-progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.upload-progress-text {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent);
}

.upload-progress-size {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-variant-numeric: tabular-nums;
}

.upload-progress-track {
    width: 100%;
    height: 8px;
    background: rgba(79, 70, 229, 0.12);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.upload-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), #818CF8);
    border-radius: 10px;
    transition: width 0.3s ease;
    position: relative;
}

.upload-progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255,255,255,0.3),
        transparent
    );
    animation: progressShine 1.5s ease-in-out infinite;
}

@keyframes progressShine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ========== Toast ========== */
.toast {
    position: fixed;
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 99999;
    padding: 10px 24px;
    border-radius: var(--radius);
    font-weight: 500;
    font-size: 0.875rem;
    box-shadow: var(--shadow-md);
    color: #fff;
    animation: toastIn 0.25s ease;
    pointer-events: none;
}

.toast.success { background: var(--text); }
.toast.error { background: var(--danger); }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(-50%) translateY(-12px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ========== Media Upload Row (file input + media library btn) ========== */
.media-upload-row {
    display: flex;
    gap: 10px;
    align-items: center;
}

.media-upload-row input[type="file"] {
    flex: 1;
    padding: 8px 10px !important;
    font-size: 0.85rem !important;
    background: var(--surface) !important;
}

.media-library-btn {
    flex-shrink: 0;
    white-space: nowrap;
    font-size: 0.82rem !important;
    padding: 8px 14px !important;
}

.media-preview-box {
    margin-top: 8px;
    padding: 8px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.84rem;
}

.media-preview-selected {
    color: var(--accent);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.media-preview-name {
    color: var(--text);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.media-preview-clear {
    flex-shrink: 0;
    padding: 2px 10px;
    font-size: 0.78rem;
    color: var(--danger);
    background: rgba(239,68,68,0.08);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}

.media-preview-clear:hover {
    background: var(--danger);
    color: #fff;
}

/* 预览框内的图片/视频缩略图 */
.media-preview-thumb {
    width: 72px;
    height: 54px;
    object-fit: cover;
    border-radius: 4px;
    flex-shrink: 0;
    border: 1px solid var(--border);
    background: #000;
}

.media-preview-thumb-video {
    width: 72px;
    height: 54px;
    object-fit: cover;
    border-radius: 4px;
    flex-shrink: 0;
    border: 1px solid var(--border);
    background: #000;
}

/* 当前文件预览区域（编辑模式下显示现有媒体） */
.current-media-label {
    font-size: 0.78rem;
    color: var(--text-tertiary);
    margin-bottom: 6px;
    font-weight: 500;
}

.current-media-preview {
    margin-bottom: 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: #000;
    max-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.current-media-img {
    max-width: 100%;
    max-height: 200px;
    object-fit: contain;
    display: block;
}

.current-media-video {
    max-width: 100%;
    max-height: 200px;
    display: block;
    outline: none;
}

/* ========== Media Library Preview Panel ========== */
.ml-preview {
    flex-shrink: 0;
    margin-bottom: 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.ml-preview-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px 20px;
    background: var(--bg);
    color: var(--text-tertiary);
    gap: 8px;
    min-height: 160px;
}

.ml-preview-empty p {
    font-size: 0.85rem;
    margin: 0;
}

.ml-preview-media {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
    min-height: 100px;
    max-height: 200px;
    overflow: hidden;
}

.ml-preview-image {
    max-width: 100%;
    max-height: 200px;
    object-fit: contain;
    display: block;
}

.ml-preview-video {
    max-width: 100%;
    max-height: 200px;
    display: block;
    outline: none;
}

.ml-preview-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 14px;
    background: var(--surface);
    border-top: 1px solid var(--border);
}

.ml-preview-title {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

.ml-preview-select-btn {
    flex-shrink: 0;
    font-size: 0.82rem !important;
    padding: 6px 14px !important;
}

/* ========== Media Library Modal ========== */
.media-library-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s;
    backdrop-filter: blur(4px);
}

.media-library-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.media-library-modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    width: 780px;
    max-width: 94vw;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 50px rgba(0,0,0,0.15);
    transform: translateY(16px);
    transition: transform 0.3s ease;
}

.media-library-overlay.active .media-library-modal {
    transform: translateY(0);
}

.media-library-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px 16px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.media-library-header h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
    margin: 0;
}

/* 媒体库弹窗头部布局 */
.ml-header-left {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
    min-width: 0;
}

.ml-header-right {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

/* 文件夹筛选下拉 */
.ml-folder-filter {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.ml-folder-select {
    font-size: 0.8rem;
    padding: 5px 28px 5px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg);
    color: var(--text);
    cursor: pointer;
    max-width: 180px;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    outline: none;
    transition: border-color 0.15s;
}

.ml-folder-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-subtle);
}

/* 批量选择数量 */
.ml-batch-count {
    font-size: 0.82rem;
    color: var(--text-secondary);
    white-space: nowrap;
    padding: 4px 10px;
    background: var(--bg);
    border-radius: 6px;
    border: 1px solid var(--border);
}

/* 全选按钮 */
.ml-select-all-btn {
    font-size: 0.78rem;
    gap: 5px;
    white-space: nowrap;
}

.ml-select-all-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.ml-batch-confirm-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.media-library-close {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    color: var(--text-secondary);
    transition: all var(--transition);
    border: 1px solid var(--border);
    cursor: pointer;
    flex-shrink: 0;
}

.media-library-close:hover {
    background: var(--text);
    color: #fff;
    border-color: var(--text);
}

.media-library-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    padding: 20px 24px;
    overflow: hidden;
}

.media-library-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 0;
}

.media-library-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 0;
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

/* Media Grid Scroll Wrapper */
.media-library-grid-scroll {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    will-change: scroll-position;
    transform: translateZ(0);
    padding-bottom: 4px;
}

/* Media Grid */
.media-library-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
    contain: layout style;
}

.ml-item {
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    transition: border-color 0.15s ease;
    content-visibility: auto;
    contain-intrinsic-size: auto 150px;
    contain: strict;
    position: relative;
}

.ml-item:hover {
    border-color: var(--accent);
}

.ml-item.ml-selected {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-subtle);
    background: var(--accent-subtle);
}

.ml-thumb {
    width: 100%;
    height: 100px;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.ml-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.ml-video-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    color: var(--text-tertiary);
    font-size: 0.75rem;
}

.ml-img-error {
    color: var(--text-tertiary);
    font-size: 0.75rem;
}

.ml-info {
    padding: 8px 10px;
}

.ml-title {
    display: block;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-bottom: 2px;
}

.ml-meta {
    font-size: 0.7rem;
    color: var(--text-tertiary);
}

/* 多选模式下的勾选覆盖层 */
.ml-check-overlay {
    position: absolute;
    top: 6px;
    right: 6px;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(255,255,255,0.9);
    box-shadow: 0 1px 4px rgba(0,0,0,0.12);
    pointer-events: none;
    transition: all 0.15s;
}

.ml-item.ml-selected .ml-check-overlay {
    background: var(--accent-subtle);
}

/* 无限滚动加载指示器 */
.ml-load-more,
.ml-no-more {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 0;
    color: var(--text-tertiary);
    font-size: 0.82rem;
}

.ml-load-more .spinner {
    width: 18px;
    height: 18px;
}

/* 批量添加确认对话框 */
.batch-preview-info {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 10px 12px;
    background: var(--accent-subtle);
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.batch-preview-info strong {
    color: var(--text);
}

.batch-fields {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 16px;
}

.batch-field-input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.85rem;
    background: var(--bg);
    color: var(--text);
    outline: none;
    transition: border-color 0.15s;
    font-family: inherit;
    box-sizing: border-box;
}

.batch-field-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-subtle);
}

.batch-items-preview {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 4px;
}

.batch-items-preview-header {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 8px 12px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
}

.batch-items-preview-list {
    max-height: 200px;
    overflow-y: auto;
    padding: 4px 0;
}

.batch-item-preview-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    font-size: 0.82rem;
    color: var(--text);
    border-bottom: 1px solid var(--bg);
}

.batch-item-preview-row:last-child {
    border-bottom: none;
}

/* ========== 批量添加文件区域 ========== */
.batch-file-section {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 16px;
    overflow: hidden;
}

.batch-file-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    font-size: 0.85rem;
}

.batch-file-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 28px 16px;
    color: var(--text-tertiary);
    font-size: 0.85rem;
}

.batch-file-list-wrap {
    max-height: 260px;
    overflow-y: auto;
}

.batch-file-list {
    padding: 4px 0;
}

.batch-item-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 7px 14px;
    font-size: 0.82rem;
    color: var(--text);
    border-bottom: 1px solid var(--bg);
    transition: background 0.15s;
}

.batch-item-row:hover {
    background: var(--bg);
}

.batch-item-row:last-child {
    border-bottom: none;
}

.batch-item-index {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    border-radius: 12px;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.batch-item-thumb {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    overflow: hidden;
}

.batch-item-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.batch-item-type {
    flex-shrink: 0;
    font-size: 0.72rem;
    color: var(--text-tertiary);
    padding: 2px 8px;
    background: var(--bg);
    border-radius: 4px;
}

.batch-item-remove {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    cursor: pointer;
    border-radius: 4px;
    padding: 0;
    transition: all 0.15s;
}

.batch-item-remove:hover {
    background: var(--danger-subtle, #fef2f2);
    color: var(--danger);
}

/* ========== Spinner ========== */
.spinner-wrap { text-align: center; padding: 48px; }
.spinner {
    display: inline-block;
    width: 28px;
    height: 28px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ========== Detail Modal (shared with frontend) ========== */
.detail-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 99998;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    backdrop-filter: blur(2px);
    padding: 20px;
}

.detail-modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.detail-modal {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 32px 30px;
    max-width: 500px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 20px 50px rgba(0,0,0,0.15);
    position: relative;
    transform: translateY(16px);
    transition: transform 0.3s ease;
}

.detail-modal-overlay.active .detail-modal {
    transform: translateY(0);
}

.detail-modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    color: var(--text-secondary);
    transition: all var(--transition);
    border: 1px solid var(--border);
}

.detail-modal-close:hover {
    background: var(--text);
    color: #fff;
    border-color: var(--text);
}

.dm-image {
    width: 100%;
    max-height: 300px;
    object-fit: cover;
    border-radius: var(--radius);
    margin-bottom: 18px;
}

.dm-video {
    width: 100%;
    max-height: 320px;
    border-radius: var(--radius);
    margin-bottom: 18px;
    background: #000;
}

.dm-avatar {
    width: 76px;
    height: 76px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 14px;
    display: block;
}

.dm-avatar-placeholder {
    width: 76px;
    height: 76px;
    border-radius: 50%;
    background: var(--accent-subtle);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0 auto 14px;
}

.detail-modal h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
    text-align: center;
}

.detail-modal .dm-meta {
    text-align: center;
    font-size: 0.82rem;
    color: var(--text-tertiary);
    margin-bottom: 16px;
}

.detail-modal .dm-fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 12px;
}

.detail-modal .dm-field {
    background: var(--bg);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
}

.detail-modal .dm-field .dm-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-tertiary);
    margin-bottom: 3px;
}

.detail-modal .dm-field .dm-value {
    font-size: 0.9rem;
    color: var(--text);
    font-weight: 500;
}

.detail-modal .dm-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-top: 6px;
    text-align: center;
}

/* ========== Category Tag ========== */
.cat-tag {
    display: inline-block;
    padding: 3px 12px;
    background: var(--accent-subtle);
    color: var(--accent);
    border-radius: 20px;
    font-size: 0.82rem;
    font-weight: 500;
}

/* ========== Datalist 下拉箭头提示 ========== */
input[list] {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239CA3AF' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 30px;
}

/* ========== Settings Tab ========== */
.settings-form {
    max-width: 100%;
}

/* Settings Cards Grid */
.settings-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}

.settings-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.settings-card:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 20px rgba(79,70,229,0.08);
    transform: translateY(-2px);
}

.settings-card:active {
    transform: translateY(0);
}

/* Global card spans full width */
.settings-card-global {
    grid-column: 1 / -1;
    flex-direction: row;
    align-items: center;
    gap: 24px;
    padding: 28px 32px;
    border: 2px solid var(--accent-subtle);
    background: linear-gradient(135deg, var(--surface) 0%, var(--accent-subtle) 100%);
}

.settings-card-global:hover {
    border-color: var(--accent);
    box-shadow: 0 8px 32px rgba(79,70,229,0.12);
}

.settings-card-global .settings-card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius);
    background: var(--accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.settings-card-global .settings-card-body {
    flex: 1;
    min-width: 0;
}

.settings-card-global .settings-card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}

.settings-card-global .settings-card-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.settings-card-global .settings-card-actions {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Page cards */
.settings-card .settings-card-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    background: var(--accent-subtle);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.settings-card .settings-card-body {
    flex: 1;
    min-width: 0;
}

.settings-card .settings-card-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 2px;
}

.settings-card .settings-card-desc {
    font-size: 0.78rem;
    color: var(--text-tertiary);
    line-height: 1.4;
}

/* Status Badge */
.settings-card-status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
    margin-top: 8px;
}

.settings-card-status.open {
    background: #ECFDF5;
    color: #059669;
}

.settings-card-status.closed {
    background: #FEF2F2;
    color: #DC2626;
}

.settings-card-status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    display: inline-block;
}

.settings-card-status.open .settings-card-status-dot {
    background: #10B981;
    box-shadow: 0 0 0 3px rgba(16,185,129,0.2);
}

.settings-card-status.closed .settings-card-status-dot {
    background: #EF4444;
    box-shadow: 0 0 0 3px rgba(239,68,68,0.2);
}

/* Announcement preview in card */
.settings-card-preview {
    font-size: 0.78rem;
    color: var(--text-tertiary);
    margin-top: 8px;
    padding: 8px 12px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    line-height: 1.5;
    max-height: 40px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.settings-card-preview:empty::after {
    content: '未设置公告';
    color: var(--text-tertiary);
    font-style: italic;
}

.settings-card .settings-card-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: auto;
}

.settings-card .btn-manage {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--accent);
    background: var(--accent-subtle);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    pointer-events: none;
}

.settings-card:hover .btn-manage {
    background: var(--accent);
    color: #fff;
}

/* ========== Settings Modal ========== */
.settings-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s;
    backdrop-filter: blur(4px);
}

.settings-modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.settings-modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 0;
    width: 500px;
    max-width: 92vw;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 20px 50px rgba(0,0,0,0.12);
    transform: translateY(16px);
    transition: transform 0.3s ease;
}

.settings-modal-overlay.active .settings-modal {
    transform: translateY(0);
}

.settings-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 28px 0;
    margin-bottom: 8px;
}

.settings-modal-header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.settings-modal-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    background: var(--accent-subtle);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.settings-modal-global-icon {
    background: var(--accent);
    color: #fff;
}

.settings-modal-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
}

.settings-modal-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    color: var(--text-secondary);
    transition: all var(--transition);
    border: 1px solid var(--border);
    cursor: pointer;
    flex-shrink: 0;
}

.settings-modal-close:hover {
    background: var(--text);
    color: #fff;
    border-color: var(--text);
}

.settings-modal-body {
    padding: 20px 28px 28px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Settings Modal: Toggle Row */
.settings-modal-toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px;
    background: var(--bg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.settings-modal-toggle-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.settings-modal-toggle-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
}

.settings-modal-toggle-status {
    font-size: 0.8rem;
    font-weight: 500;
    transition: color var(--transition);
}

.settings-modal-toggle-status.open { color: #059669; }
.settings-modal-toggle-status.closed { color: #DC2626; }

/* Settings Modal: Announcement Textarea */
.settings-modal-field {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.settings-modal-field-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text);
}

.settings-modal-textarea {
    width: 100%;
    min-height: 120px;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-family: inherit;
    line-height: 1.7;
    resize: vertical;
    outline: none;
    transition: all var(--transition);
    background: var(--bg);
    color: var(--text);
}

.settings-modal-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-subtle);
    background: var(--surface);
}

.settings-modal-textarea::placeholder {
    color: var(--text-tertiary);
}

/* Settings Modal: Hint */
.settings-modal-hint {
    font-size: 0.78rem;
    color: var(--text-tertiary);
    line-height: 1.5;
    margin-top: -8px;
}

/* Settings Modal: Actions */
.settings-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding-top: 4px;
}

/* ========== Toggle Switch (existing, reused) ========== */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
    flex-shrink: 0;
    cursor: pointer;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    inset: 0;
    background: #D1D5DB;
    border-radius: 28px;
    transition: all 0.25s ease;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.25s ease;
    box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--accent);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(24px);
}

.toggle-switch:focus-within .toggle-slider {
    box-shadow: 0 0 0 3px var(--accent-subtle);
}

/* ========== Responsive for Settings ========== */
@media (max-width: 900px) {
    .settings-cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .settings-card-global {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
}

@media (max-width: 600px) {
    .settings-cards-grid {
        grid-template-columns: 1fr;
    }
    .settings-card-global {
        padding: 20px;
    }
}

/* ========== Hamburger Toggle (Mobile) ========== */
.hamburger-btn {
    display: none;
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 999;
    width: 38px;
    height: 38px;
    border-radius: 8px;
    background: var(--text);
    color: #fff;
    border: none;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    transition: left 0.3s ease, background 0.2s;
}
.hamburger-btn:hover { background: #000; }
.hamburger-btn svg { width: 20px; height: 20px; }

.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 90;
    opacity: 0;
    transition: opacity 0.25s;
}
.sidebar-backdrop.show {
    display: block;
    opacity: 1;
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .hamburger-btn { display: flex; }
    .admin-sidebar {
        width: 260px;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 95;
        box-shadow: 4px 0 20px rgba(0,0,0,0.15);
    }
    .admin-sidebar.open {
        transform: translateX(0);
    }
    .sidebar-brand { display: block; }
    .sidebar-nav button { justify-content: flex-start; padding: 10px 14px; }
    .sidebar-nav button span { display: inline; }
    .sidebar-footer .logout-btn { justify-content: flex-start; }
    .sidebar-footer .logout-btn span { display: inline; }
    .admin-main { margin-left: 0; padding: 56px 16px 24px; }
    .page-head { flex-direction: column; align-items: flex-start; }
    .detail-modal { padding: 24px 20px; max-width: 95vw; }
    .detail-modal .dm-fields { grid-template-columns: 1fr; }
    .detail-modal h2 { font-size: 1.1rem; }
    table { font-size: 0.8rem; }
    th, td { padding: 8px 10px; }
    th { font-size: 0.72rem; }
    .actions-cell { flex-wrap: wrap; gap: 4px; }
}

@media (max-width: 480px) {
    .admin-main { padding: 16px 10px; }
    .page-head h2 { font-size: 1.1rem; }
    .mini-img { width: 48px; height: 36px; }
    .detail-modal { padding: 20px 16px; border-radius: var(--radius); }
    .dm-image { max-height: 200px; }
    .dm-video { max-height: 220px; }
}

/* ========== Media Library Tab ========== */
.media-tab-filters {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.media-filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.media-filter-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-subtle);
}

.media-filter-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.media-tab-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 64px 20px;
    color: var(--text-tertiary);
    font-size: 0.9rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.media-tab-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
    contain: layout style;
}

.mt-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.18s ease;
    content-visibility: auto;
    contain-intrinsic-size: auto 220px;
}

.mt-item:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 16px rgba(79,70,229,0.1);
    transform: translateY(-2px);
}

.mt-thumb {
    width: 100%;
    height: 140px;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.mt-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    content-visibility: auto;
}

.mt-video-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    background: #1a1a2e;
    color: var(--accent);
}

.mt-img-error {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
}

.mt-info {
    padding: 10px 12px;
}

.mt-name {
    display: block;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-bottom: 2px;
}

.mt-meta {
    font-size: 0.73rem;
    color: var(--text-tertiary);
}

/* Upload hint text */
.upload-hint {
    font-size: 0.76rem;
    color: var(--text-tertiary);
    margin-top: 6px;
    line-height: 1.5;
}

/* ========== Media Tab: Folder Sidebar Layout ========== */
.media-tab-layout {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.media-folder-sidebar {
    width: 200px;
    flex-shrink: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    position: sticky;
    top: 20px;
}

.media-folder-sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px 10px;
    border-bottom: 1px solid var(--border);
}

.media-folder-sidebar-header span {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text);
}

.media-folder-sidebar-header button {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    font-size: 16px;
    line-height: 1;
}

.media-folder-sidebar-header button:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.media-folder-list {
    max-height: 420px;
    overflow-y: auto;
    padding: 6px 0;
}

.media-folder-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    cursor: pointer;
    font-size: 0.82rem;
    color: var(--text-secondary);
    transition: all 0.12s ease;
    position: relative;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.media-folder-item:hover {
    background: var(--bg);
    color: var(--text);
}

.media-folder-item.active {
    background: var(--accent-subtle);
    color: var(--accent);
    font-weight: 600;
}

.media-folder-item .folder-icon {
    color: var(--accent);
    flex-shrink: 0;
}

.media-folder-item .folder-count {
    margin-left: auto;
    font-size: 0.7rem;
    color: var(--text-tertiary);
    background: var(--bg);
    padding: 1px 7px;
    border-radius: 10px;
}

.media-folder-item.active .folder-count {
    background: var(--accent);
    color: #fff;
}

/* ========== Drag & Drop Zone ========== */
.media-drop-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    margin-bottom: 16px;
    transition: all 0.2s ease;
    background: var(--surface);
    cursor: pointer;
    position: relative;
}

.media-drop-zone:hover {
    border-color: var(--accent);
    background: var(--accent-subtle);
}

.media-drop-zone.drag-over {
    border-color: var(--accent);
    background: var(--accent-subtle);
    box-shadow: 0 0 0 4px rgba(79,70,229,0.1);
    transform: scale(1.01);
}

.media-drop-zone.drag-over-folder {
    border-color: #059669;
    background: #ECFDF5;
    box-shadow: 0 0 0 4px rgba(5,150,105,0.1);
}

.media-drop-zone-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    background: var(--bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
}

.media-drop-zone.drag-over .media-drop-zone-icon,
.media-drop-zone.drag-over-folder .media-drop-zone-icon {
    color: var(--accent);
    background: var(--surface);
}

.media-drop-zone h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 4px;
}

.media-drop-zone p {
    font-size: 0.78rem;
    color: var(--text-tertiary);
    margin-bottom: 12px;
}

.media-drop-zone .btn {
    margin-top: 4px;
}

/* ========== Batch upload queue ========== */
.media-upload-queue {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 16px;
    max-height: 200px;
    overflow-y: auto;
    display: none;
}

.media-upload-queue.visible {
    display: block;
}

.media-upload-queue-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text);
    position: sticky;
    top: 0;
    background: var(--surface);
    z-index: 1;
}

.media-upload-queue-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    font-size: 0.8rem;
}

.media-upload-queue-item:last-child {
    border-bottom: none;
}

.media-upload-queue-item .queue-icon {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.media-upload-queue-item .queue-info {
    flex: 1;
    min-width: 0;
}

.media-upload-queue-item .queue-name {
    font-weight: 500;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.media-upload-queue-item .queue-size {
    font-size: 0.72rem;
    color: var(--text-tertiary);
}

.media-upload-queue-item .queue-status {
    font-size: 0.72rem;
    flex-shrink: 0;
}

.media-upload-queue-item .queue-status.pending {
    color: var(--text-tertiary);
}

.media-upload-queue-item .queue-status.uploading {
    color: var(--accent);
}

.media-upload-queue-item .queue-status.success {
    color: #059669;
}

.media-upload-queue-item .queue-status.error {
    color: var(--danger);
}

/* ========== Media tab: Batch selection mode ========== */
.media-tab-main {
    flex: 1;
    min-width: 0;
}

.media-batch-bar {
    display: none;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: var(--accent-subtle);
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    margin-bottom: 12px;
    font-size: 0.82rem;
}

.media-batch-bar.visible {
    display: flex;
}

.media-batch-bar .batch-count {
    font-weight: 600;
    color: var(--accent);
}

.media-batch-bar .batch-actions {
    display: flex;
    gap: 6px;
    margin-left: auto;
}

.media-batch-bar select {
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.8rem;
    background: var(--surface);
    color: var(--text);
}

/* ========== Media tab item checkbox ========== */
.mt-item {
    position: relative;
}

.mt-checkbox {
    position: absolute;
    top: 8px;
    left: 8px;
    z-index: 2;
    width: 20px;
    height: 20px;
    border-radius: 4px;
    border: 2px solid rgba(255,255,255,0.8);
    background: rgba(0,0,0,0.2);
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}

.mt-item.selectable .mt-checkbox {
    display: flex;
}

.mt-item.selected .mt-checkbox {
    background: var(--accent);
    border-color: var(--accent);
}

.mt-item.selected {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-subtle);
}

.mt-item.selected .mt-checkbox::after {
    content: '';
    display: block;
    width: 5px;
    height: 9px;
    border: solid #fff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    margin-top: -2px;
}

/* ========== Upload confirmation dialog ========== */
.upload-confirm-modal {
    max-width: 620px;
    width: 95vw;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
}

.upload-confirm-summary {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.upload-confirm-stat {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    background: var(--bg);
    padding: 5px 10px;
    border-radius: 6px;
}

.upload-confirm-stat-warn {
    background: #FFF7ED;
    color: #C2410C;
}

.upload-confirm-actions-top {
    display: flex;
    gap: 6px;
    margin-left: auto;
}

.upload-confirm-list {
    flex: 1;
    overflow-y: auto;
    max-height: 40vh;
    margin: 10px 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.upload-confirm-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--surface);
    transition: background 0.15s;
}

.upload-confirm-item:hover {
    background: var(--bg);
}

.upload-confirm-checkbox-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.82rem;
}

.upload-confirm-checkbox {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
    flex-shrink: 0;
    cursor: pointer;
}

.upload-confirm-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text);
}

.upload-confirm-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    padding-left: 24px;
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.upload-confirm-size {
    color: var(--text-secondary);
}

.upload-confirm-folder {
    color: var(--accent);
}

.upload-confirm-dup-badge {
    color: #C2410C;
    font-weight: 500;
    background: #FFF7ED;
    padding: 1px 6px;
    border-radius: 3px;
}

.upload-confirm-dup-hint {
    color: var(--text-tertiary);
    font-style: italic;
}

/* ========== Media pagination ========== */
.media-pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0 6px;
    margin-top: 10px;
    border-top: 1px solid var(--border);
}

.media-pagination-info {
    font-size: 0.82rem;
    color: var(--text-tertiary);
}

.media-pagination-btns {
    display: flex;
    gap: 8px;
}

.media-pagination-btns .btn[disabled] {
    opacity: 0.4;
    pointer-events: none;
}

/* ========== Folder move modal ========== */
.folder-move-list {
    max-height: 300px;
    overflow-y: auto;
}

.folder-move-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all 0.12s ease;
    font-size: 0.88rem;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    color: var(--text);
}

.folder-move-option:hover {
    background: var(--accent-subtle);
}

.folder-move-option .move-icon {
    color: var(--accent);
    flex-shrink: 0;
}

/* ========== Move candidates modal (移入已有文件) ========== */
.move-candidates-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    gap: 12px;
}

.move-candidates-header span {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.move-candidates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 8px;
    max-height: 360px;
    overflow-y: auto;
    padding: 2px;
    scroll-behavior: smooth;
}

.move-candidates-grid::-webkit-scrollbar {
    width: 5px;
}

.move-candidates-grid::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 10px;
}

.mc-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s ease;
    background: var(--bg);
    user-select: none;
}

.mc-item:hover {
    border-color: var(--accent);
    background: var(--accent-subtle);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.mc-item[data-selected="1"] {
    border-color: var(--accent);
    background: var(--accent-subtle);
    box-shadow: 0 0 0 2px var(--accent-subtle);
}

.mc-checkbox {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-radius: 5px;
    flex-shrink: 0;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface);
}

.mc-item[data-selected="1"] .mc-checkbox {
    background: var(--accent);
    border-color: var(--accent);
}

.mc-item[data-selected="1"] .mc-checkbox::after {
    content: '';
    display: block;
    width: 5px;
    height: 10px;
    border: solid #fff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) translateY(-1px);
}

.mc-thumb {
    width: 44px;
    height: 44px;
    border-radius: 6px;
    overflow: hidden;
    flex-shrink: 0;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
}

.mc-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.mc-video-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    color: var(--text-tertiary);
}

.mc-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.mc-name {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mc-meta {
    font-size: 0.72rem;
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ========== Media tab empty state for folder ========== */
.media-folder-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 20px;
    color: var(--text-tertiary);
    font-size: 0.85rem;
    text-align: center;
}

.media-folder-empty-icon {
    margin-bottom: 12px;
    opacity: 0.4;
}

.media-folder-empty h4 {
    font-size: 1rem;
    color: var(--text);
    margin-bottom: 4px;
    font-weight: 600;
}

.media-folder-empty p {
    margin-bottom: 16px;
}

.media-folder-empty-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
}

/* ========== Media folder toolbar（文件夹操作栏） ========== */
.media-folder-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 14px;
    background: #F9FAFB;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.mft-info {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
}

.mft-name {
    font-weight: 600;
    color: var(--text);
}

.mft-count {
    font-size: 0.78rem;
    color: var(--text-tertiary);
    background: var(--bg);
    padding: 2px 8px;
    border-radius: 10px;
}

.mft-actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

/* ========== btn-outline-danger ========== */
.btn-outline-danger {
    background: transparent !important;
    color: var(--danger) !important;
    border: 1px solid var(--danger) !important;
}

.btn-outline-danger:hover {
    background: #FEF2F2 !important;
    border-color: var(--danger-hover) !important;
}

/* ========== Delete warning confirm box ========== */
.delete-warning-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 16px 0 8px;
    gap: 8px;
    font-size: 0.88rem;
    color: var(--text);
}

.delete-warning-icon {
    color: var(--danger);
    margin-bottom: 4px;
}

.delete-warning-note {
    font-size: 0.78rem;
    color: var(--text-tertiary);
    max-width: 320px;
    line-height: 1.5;
}

/* ========== Responsive for media folder layout ========== */
@media (max-width: 900px) {
    .media-tab-layout {
        flex-direction: column;
    }
    .media-folder-sidebar {
        width: 100%;
        position: static;
    }
    .media-folder-list {
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
        padding: 10px 12px;
        max-height: none;
    }
    .media-folder-item {
        width: auto;
        padding: 6px 12px;
        border-radius: 20px;
        font-size: 0.78rem;
        background: var(--bg);
    }
    .media-folder-item .folder-count {
        display: none;
    }
    .media-folder-item.active {
        background: var(--accent);
        color: #fff;
    }
    .media-folder-toolbar {
        flex-direction: column;
        align-items: flex-start;
        padding: 10px;
    }
    .mft-actions {
        width: 100%;
    }
    .mft-actions .btn {
        flex: 1;
        justify-content: center;
    }
}

/* ========== 文件夹分享样式 ========== */
.share-empty {
    text-align: center;
    padding: 30px 16px;
    background: var(--bg);
    border-radius: var(--radius);
    color: var(--text-secondary);
}
.share-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 240px;
    overflow-y: auto;
}
.share-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: border-color 0.2s;
}
.share-item:hover { border-color: var(--accent); }
.share-item.expired { opacity: 0.5; }
.share-item-info { flex: 1; min-width: 0; }
.share-item-url {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    margin-bottom: 4px;
    color: var(--text);
}
.share-item-url code {
    font-size: 0.85rem;
    color: var(--accent);
    background: var(--bg-tertiary);
    padding: 1px 6px;
    border-radius: 3px;
}
.share-item-desc {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 320px;
}
.share-item-meta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 0.75rem;
    color: var(--text-tertiary);
}
.share-item-meta span {
    display: inline-flex;
    align-items: center;
    gap: 3px;
}
.share-item-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}
.share-create-section {
    border-top: 1px solid var(--border);
    padding-top: 16px;
}
.share-success-icon {
    display: flex;
    justify-content: center;
    margin-bottom: 4px;
}
.share-link-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    margin: 8px 0;
}
.share-link-box code {
    flex: 1;
    font-size: 0.8rem;
    color: var(--accent);
    word-break: break-all;
    overflow-wrap: anywhere;
}

/* ========== 分享管理（统一管理页） ========== */
.share-mgmt-empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}
.share-mgmt-table-wrap {
    overflow-x: auto;
}
.share-mgmt-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}
.share-mgmt-table th {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 2px solid var(--border);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.78rem;
    white-space: nowrap;
}
.share-mgmt-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}
.share-mgmt-table tr.row-dim {
    opacity: 0.5;
}
.share-mgmt-table tr.row-dim:hover {
    opacity: 0.75;
}
.share-mgmt-table tr:hover {
    background: var(--bg);
}
.share-code-tag {
    font-family: 'SF Mono', 'Consolas', monospace;
    font-size: 0.82rem;
    color: var(--accent);
    background: var(--accent-subtle);
    padding: 2px 8px;
    border-radius: 4px;
    cursor: pointer;
}
.td-desc {
    max-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text-secondary);
}
.status-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}
.status-badge.s-active { background: #ECFDF5; color: #059669; }
.status-badge.s-expired { background: #FEF3C7; color: #D97706; }
.status-badge.s-inactive { background: #FEE2E2; color: #DC2626; }
.status-badge.s-pw { background: #EDE9FE; color: #7C3AED; margin-left: 4px; }
.content-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}
.share-actions-cell {
    display: flex;
    gap: 3px;
    flex-wrap: wrap;
}
.btn-xs {
    padding: 4px 7px;
    font-size: 0.7rem;
    border-radius: 4px;
    min-width: 28px;
    justify-content: center;
}
.page-head-actions {
    display: flex;
    gap: 8px;
}

/* 创建分享：媒体选择网格 */
.share-create-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.media-preview-bar {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    min-height: 56px;
    max-height: 84px;
    padding: 6px 8px;
    margin-bottom: 8px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    align-items: center;
}
.media-preview-bar:empty {
    display: none;
}
.media-preview-bar .pv-thumb {
    width: 48px;
    height: 48px;
    border-radius: 4px;
    object-fit: cover;
    flex-shrink: 0;
    border: 2px solid var(--accent);
    cursor: pointer;
}
.media-preview-bar .pv-thumb-v {
    width: 48px;
    height: 48px;
    border-radius: 4px;
    flex-shrink: 0;
    background: #1a1a2e;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    border: 2px solid var(--accent);
    cursor: pointer;
}
.media-preview-bar .pv-remove {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 16px;
    height: 16px;
    background: var(--danger);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 10px;
    cursor: pointer;
}
.media-preview-bar .pv-wrap {
    position: relative;
    flex-shrink: 0;
}
.media-select-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 8px;
    max-height: 280px;
    overflow-y: auto;
    padding: 4px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    contain: layout style;
}
.ms-item {
    position: relative;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px;
    cursor: pointer;
    background: var(--surface);
    transition: all 0.15s;
    text-align: center;
    content-visibility: auto;
    contain-intrinsic-size: auto 140px;
}
.ms-item:hover { border-color: var(--accent); }
.ms-item.ms-selected {
    border-color: var(--accent);
    background: var(--accent-subtle);
    box-shadow: 0 0 0 2px var(--accent);
}
.ms-item .ms-check {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 20px;
    height: 20px;
    border-radius: 4px;
    border: 2px solid var(--border);
    background: var(--surface);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}
.ms-item .ms-check i { display: none; }
.ms-item.ms-selected .ms-check {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}
.ms-item.ms-selected .ms-check i { display: inline-block; }
.ms-item .ms-thumb {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    border-radius: 3px;
    display: block;
}
.ms-item .ms-thumb-v {
    width: 100%;
    aspect-ratio: 4/3;
    background: #1a1a2e;
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #aaa;
}
.ms-item .ms-name {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}