:root {
    --bg: #fdf6ee;
    --fg: #4a3728;
    --fg-secondary: #8c7260;
    --card: #ffffff;
    --card-hover: #fff7ef;
    --card-active: #ffeedd;
    --border: #f0e0cc;
    --border-light: #f7ecdd;
    --muted: #b89b7a;
    --accent: #e8853a;
    --accent-dark: #cf6b1f;
    --accent-soft: rgba(232, 133, 58, 0.10);
    --accent-glow: rgba(232, 133, 58, 0.25);
    --play: #f0a030;
    --download: #e8853a;
    --error: #d94f3d;
    --error-bg: #fef0ee;
    --icon-bg: #faf0e4;
    --icon-border: #f0e0cc;
    --shadow-sm: 0 1px 3px rgba(74, 55, 40, 0.06);
    --shadow-md: 0 4px 12px rgba(74, 55, 40, 0.08);
    --shadow-lg: 0 8px 24px rgba(74, 55, 40, 0.12);
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #1e1712;
        --fg: #f0e4d8;
        --fg-secondary: #a08c78;
        --card: #2a2119;
        --card-hover: #342a20;
        --card-active: #3e3228;
        --border: #3e3228;
        --border-light: #342a20;
        --muted: #8c7a66;
        --accent: #e8934a;
        --accent-dark: #f0a060;
        --accent-soft: rgba(232, 147, 74, 0.12);
        --accent-glow: rgba(232, 147, 74, 0.20);
        --play: #f0a848;
        --download: #e8934a;
        --error: #e8685a;
        --error-bg: #3a2220;
        --icon-bg: #342a20;
        --icon-border: #4a3c30;
        --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
        --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
        --shadow-lg: 0 8px 24px rgba(0,0,0,0.4);
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', Roboto, Arial, sans-serif;
    background: var(--bg);
    color: var(--fg);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ===== 顶栏 ===== */
.header {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: #fff;
    padding: 0 20px;
    height: 54px;
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 12px rgba(207, 107, 31, 0.3);
}
.header h1 {
    font-size: 17px;
    font-weight: 600;
    letter-spacing: 0.3px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.header-actions { display: flex; gap: 4px; }
.header-actions a {
    color: #fff;
    text-decoration: none;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-size: 16px;
    transition: background 0.15s;
}
.header-actions a:hover { background: rgba(255,255,255,0.18); }
.header-actions a:active { background: rgba(255,255,255,0.30); }

/* ===== 面包屑 ===== */
.breadcrumb {
    padding: 10px 20px;
    background: var(--card);
    font-size: 13px;
    overflow-x: auto;
    white-space: nowrap;
    border-bottom: 1px solid var(--border-light);
    scrollbar-width: none;
}
.breadcrumb::-webkit-scrollbar { display: none; }
.breadcrumb a {
    color: var(--accent);
    text-decoration: none;
    padding: 4px 10px;
    border-radius: 8px;
    transition: background 0.15s, color 0.15s;
    font-weight: 500;
}
.breadcrumb a:hover { background: var(--accent-soft); }
.breadcrumb .sep { color: var(--muted); margin: 0 2px; font-size: 11px; }
.breadcrumb .current {
    color: var(--fg);
    font-weight: 600;
    padding: 4px 10px;
}

/* ===== 搜索栏 ===== */
.search-box {
    padding: 12px 20px;
    background: var(--card);
    border-bottom: 1px solid var(--border-light);
}
.search-box input {
    width: 100%;
    max-width: 560px;
    padding: 10px 18px;
    border: 1.5px solid var(--border);
    border-radius: 12px;
    font-size: 14px;
    outline: none;
    background: var(--bg);
    color: var(--fg);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.search-box input::placeholder { color: var(--muted); }
.search-box input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ===== 统计条 ===== */
.stats {
    padding: 10px 20px;
    font-size: 12px;
    color: var(--fg-secondary);
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}
.stats span {
    padding: 4px 12px;
    background: var(--card);
    border-radius: 20px;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    font-variant-numeric: tabular-nums;
}

/* ===== 主容器 ===== */
.container {
    padding: 16px 20px 40px;
    max-width: 1200px;
    margin: 0 auto;
}

/* ===== 文件网格 ===== */
.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(155px, 1fr));
    gap: 14px;
}

.item {
    background: var(--card);
    border-radius: var(--radius-lg);
    padding: 18px 14px 14px;
    cursor: pointer;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s, transform 0.15s, border-color 0.2s, background 0.15s;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 10px;
    position: relative;
}
.item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--border);
    background: var(--card-hover);
}
.item:active {
    transform: translateY(0) scale(0.98);
    background: var(--card-active);
}

/* 方块图标 */
.item .icon {
    font-size: 34px;
    width: 62px;
    height: 62px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--icon-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--icon-border);
    transition: transform 0.15s;
    flex-shrink: 0;
}
.item:hover .icon { transform: scale(1.06); }

.item .info {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.item .name {
    font-size: 13px;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    width: 100%;
    line-height: 1.3;
}
.item .meta {
    font-size: 11px;
    color: var(--muted);
    display: flex;
    justify-content: center;
    gap: 6px;
    flex-wrap: wrap;
    line-height: 1.4;
}

/* 操作按钮 */
.item .actions {
    display: flex;
    gap: 6px;
    justify-content: center;
    margin-top: 2px;
}
.item .actions button {
    padding: 5px 14px;
    font-size: 12px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    color: #fff;
    font-weight: 500;
    transition: opacity 0.15s, transform 0.1s;
    line-height: 1.4;
}
.item .actions button:hover { opacity: 0.85; }
.item .actions button:active { transform: scale(0.93); }
.btn-play { background: var(--play); }
.btn-download { background: var(--download); }

/* ===== 加载态 ===== */
.loading {
    text-align: center;
    padding: 60px 20px;
    color: var(--muted);
    font-size: 14px;
}
.loading .spinner {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    animation: spin 1.2s cubic-bezier(0.45, 0.05, 0.55, 0.95) infinite;
    font-size: 28px;
    width: 56px;
    height: 56px;
    background: var(--card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    margin-bottom: 12px;
}
@keyframes spin { 100% { transform: rotate(360deg); } }

/* ===== 空态 ===== */
.empty {
    text-align: center;
    padding: 80px 20px;
    color: var(--muted);
    font-size: 14px;
}
.empty .icon {
    font-size: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: var(--card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    margin-bottom: 16px;
}

/* ===== 错误态 ===== */
.error {
    text-align: center;
    padding: 40px 24px;
    color: var(--error);
    background: var(--error-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--error);
    margin: 20px 0;
    font-size: 14px;
    line-height: 1.6;
}

/* ===== 页脚 ===== */
.footer {
    text-align: center;
    padding: 24px 20px 32px;
    font-size: 12px;
    color: var(--muted);
}
.footer a {
    color: var(--muted);
    text-decoration: none;
    transition: color 0.15s;
}
.footer a:hover { color: var(--accent); }

/* ===== 响应式 ===== */
@media (max-width: 480px) {
    .header { padding: 0 14px; height: 50px; }
    .header h1 { font-size: 15px; }
    .breadcrumb { padding: 8px 14px; }
    .search-box { padding: 10px 14px; }
    .stats { padding: 8px 14px; gap: 6px; }
    .container { padding: 12px 14px 32px; }
    .file-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 10px;
    }
    .item {
        padding: 14px 10px 12px;
        border-radius: 16px;
        gap: 8px;
    }
    .item .icon {
        font-size: 28px;
        width: 52px;
        height: 52px;
        border-radius: var(--radius-sm);
    }
    .item .name { font-size: 12px; }
    .item .meta { font-size: 10px; gap: 4px; }
    .item .actions button { padding: 4px 10px; font-size: 11px; border-radius: 8px; }
}