/* ========================================
   Palette Theme - 调色板主题
   毛玻璃质感 · 6色自由切换 · 简约现代
   ======================================== */

/* ============ 默认主题色：极光紫 (Aurora Purple) ============ */
:root, [data-theme="purple"] {
    --bg-start: #f0e6ff;
    --bg-mid-1: #e8e0f0;
    --bg-mid-2: #e0e8f8;
    --bg-end: #f5f0ff;
    --glass-bg: rgba(255, 255, 255, 0.55);
    --glass-border: rgba(255, 255, 255, 0.6);
    --glass-shadow: 0 8px 32px rgba(100, 50, 180, 0.08);
    --text-primary: #2d2040;
    --text-secondary: #6b5e80;
    --text-muted: #9a8dae;
    --accent: #7c5cfc;
    --accent-light: #a78bfa;
    --accent-glow: rgba(124, 92, 252, 0.25);
    --card-bg: rgba(255, 255, 255, 0.45);
    --card-hover-bg: rgba(255, 255, 255, 0.7);
    --card-border: rgba(255, 255, 255, 0.5);
    --card-shadow: 0 4px 16px rgba(100, 50, 180, 0.06);
    --card-hover-shadow: 0 8px 28px rgba(100, 50, 180, 0.14);
    --nav-bg: rgba(245, 242, 255, 0.6);
    --nav-active: #7c5cfc;
    --search-bg: rgba(255, 255, 255, 0.6);
    --search-focus-bg: rgba(255, 255, 255, 0.85);
    --search-border: rgba(180, 160, 220, 0.4);
    --search-focus-border: rgba(124, 92, 252, 0.5);
    --footer-text: #9a8dae;
    --dropdown-bg: rgba(255, 255, 255, 0.9);
    --dropdown-shadow: 0 8px 30px rgba(100, 50, 180, 0.15);
    --icon-color: #7c5cfc;
    --scrollbar-thumb: #c4b5e0;
    --scrollbar-track: transparent;
    --card-hover-gradient: linear-gradient(135deg, rgba(124, 92, 252, 0.06), rgba(167, 139, 250, 0.03));
    --category-hover-bg: rgba(124, 92, 252, 0.08);
}

/* ============ 板岩蓝 (Slate Blue) ============ */
[data-theme="blue"] {
    --bg-start: #e8ecf1;
    --bg-mid-1: #eef0f4;
    --bg-mid-2: #f0ece6;
    --bg-end: #f5f2ed;
    --glass-bg: rgba(255, 255, 255, 0.48);
    --glass-border: rgba(255, 255, 255, 0.55);
    --glass-shadow: 0 4px 24px rgba(60, 70, 90, 0.06);
    --text-primary: #2c3544;
    --text-secondary: #5b6a7e;
    --text-muted: #8d9aad;
    --accent: #5b7fbd;
    --accent-light: #7a9ecf;
    --accent-glow: rgba(91, 127, 189, 0.18);
    --card-bg: rgba(255, 255, 255, 0.38);
    --card-hover-bg: rgba(255, 255, 255, 0.64);
    --card-border: rgba(210, 215, 225, 0.45);
    --card-shadow: 0 2px 12px rgba(60, 70, 90, 0.04);
    --card-hover-shadow: 0 8px 28px rgba(60, 70, 90, 0.10);
    --nav-bg: rgba(248, 249, 251, 0.55);
    --nav-active: #5b7fbd;
    --search-bg: rgba(255, 255, 255, 0.52);
    --search-focus-bg: rgba(255, 255, 255, 0.78);
    --search-border: rgba(185, 195, 210, 0.45);
    --search-focus-border: rgba(91, 127, 189, 0.45);
    --footer-text: #8d9aad;
    --dropdown-bg: rgba(255, 255, 255, 0.85);
    --dropdown-shadow: 0 8px 32px rgba(60, 70, 90, 0.12);
    --icon-color: #5b7fbd;
    --scrollbar-thumb: #c0cad8;
    --card-hover-gradient: linear-gradient(135deg, rgba(91, 127, 189, 0.05), rgba(122, 158, 207, 0.03));
    --category-hover-bg: rgba(91, 127, 189, 0.08);
}

/* ============ 森林绿 (Forest Green) ============ */
[data-theme="green"] {
    --bg-start: #e8f5e9;
    --bg-mid-1: #edf7ee;
    --bg-mid-2: #eef5f0;
    --bg-end: #f2f8f0;
    --glass-bg: rgba(255, 255, 255, 0.50);
    --glass-border: rgba(255, 255, 255, 0.58);
    --glass-shadow: 0 8px 32px rgba(40, 120, 60, 0.06);
    --text-primary: #1e3324;
    --text-secondary: #4a6b52;
    --text-muted: #779a80;
    --accent: #4a9c5d;
    --accent-light: #6dbd7e;
    --accent-glow: rgba(74, 156, 93, 0.22);
    --card-bg: rgba(255, 255, 255, 0.42);
    --card-hover-bg: rgba(255, 255, 255, 0.68);
    --card-border: rgba(255, 255, 255, 0.48);
    --card-shadow: 0 4px 16px rgba(40, 120, 60, 0.05);
    --card-hover-shadow: 0 8px 28px rgba(40, 120, 60, 0.12);
    --nav-bg: rgba(242, 248, 243, 0.58);
    --nav-active: #4a9c5d;
    --search-bg: rgba(255, 255, 255, 0.58);
    --search-focus-bg: rgba(255, 255, 255, 0.84);
    --search-border: rgba(150, 200, 165, 0.42);
    --search-focus-border: rgba(74, 156, 93, 0.48);
    --footer-text: #779a80;
    --dropdown-bg: rgba(255, 255, 255, 0.88);
    --dropdown-shadow: 0 8px 30px rgba(40, 120, 60, 0.12);
    --icon-color: #4a9c5d;
    --scrollbar-thumb: #b0d4b8;
    --card-hover-gradient: linear-gradient(135deg, rgba(74, 156, 93, 0.05), rgba(109, 189, 126, 0.03));
    --category-hover-bg: rgba(74, 156, 93, 0.08);
}

/* ============ 玫瑰粉 (Rose Pink) ============ */
[data-theme="pink"] {
    --bg-start: #fce4ec;
    --bg-mid-1: #f8e8f0;
    --bg-mid-2: #f5e8f2;
    --bg-end: #faf0f5;
    --glass-bg: rgba(255, 255, 255, 0.52);
    --glass-border: rgba(255, 255, 255, 0.60);
    --glass-shadow: 0 8px 32px rgba(180, 50, 110, 0.07);
    --text-primary: #3d1a2e;
    --text-secondary: #7a4a62;
    --text-muted: #a87890;
    --accent: #d4608b;
    --accent-light: #e888a8;
    --accent-glow: rgba(212, 96, 139, 0.24);
    --card-bg: rgba(255, 255, 255, 0.44);
    --card-hover-bg: rgba(255, 255, 255, 0.68);
    --card-border: rgba(255, 255, 255, 0.50);
    --card-shadow: 0 4px 16px rgba(180, 50, 110, 0.05);
    --card-hover-shadow: 0 8px 28px rgba(180, 50, 110, 0.13);
    --nav-bg: rgba(250, 240, 245, 0.58);
    --nav-active: #d4608b;
    --search-bg: rgba(255, 255, 255, 0.58);
    --search-focus-bg: rgba(255, 255, 255, 0.84);
    --search-border: rgba(220, 170, 190, 0.42);
    --search-focus-border: rgba(212, 96, 139, 0.48);
    --footer-text: #a87890;
    --dropdown-bg: rgba(255, 255, 255, 0.88);
    --dropdown-shadow: 0 8px 30px rgba(180, 50, 110, 0.14);
    --icon-color: #d4608b;
    --scrollbar-thumb: #e4b8c8;
    --card-hover-gradient: linear-gradient(135deg, rgba(212, 96, 139, 0.05), rgba(232, 136, 168, 0.03));
    --category-hover-bg: rgba(212, 96, 139, 0.08);
}

/* ============ 日落橙 (Sunset Orange) ============ */
[data-theme="orange"] {
    --bg-start: #fff3e6;
    --bg-mid-1: #faf0e8;
    --bg-mid-2: #f8efe4;
    --bg-end: #fdf6ee;
    --glass-bg: rgba(255, 255, 255, 0.52);
    --glass-border: rgba(255, 255, 255, 0.60);
    --glass-shadow: 0 8px 32px rgba(180, 100, 30, 0.07);
    --text-primary: #3d2818;
    --text-secondary: #7a5c3e;
    --text-muted: #a88460;
    --accent: #e08840;
    --accent-light: #f0a868;
    --accent-glow: rgba(224, 136, 64, 0.24);
    --card-bg: rgba(255, 255, 255, 0.44);
    --card-hover-bg: rgba(255, 255, 255, 0.68);
    --card-border: rgba(255, 255, 255, 0.50);
    --card-shadow: 0 4px 16px rgba(180, 100, 30, 0.05);
    --card-hover-shadow: 0 8px 28px rgba(180, 100, 30, 0.13);
    --nav-bg: rgba(253, 246, 238, 0.58);
    --nav-active: #e08840;
    --search-bg: rgba(255, 255, 255, 0.58);
    --search-focus-bg: rgba(255, 255, 255, 0.84);
    --search-border: rgba(220, 190, 155, 0.42);
    --search-focus-border: rgba(224, 136, 64, 0.48);
    --footer-text: #a88460;
    --dropdown-bg: rgba(255, 255, 255, 0.88);
    --dropdown-shadow: 0 8px 30px rgba(180, 100, 30, 0.14);
    --icon-color: #e08840;
    --scrollbar-thumb: #e4c8a8;
    --card-hover-gradient: linear-gradient(135deg, rgba(224, 136, 64, 0.05), rgba(240, 168, 104, 0.03));
    --category-hover-bg: rgba(224, 136, 64, 0.08);
}

/* ============ 海洋青 (Ocean Teal) ============ */
[data-theme="teal"] {
    --bg-start: #e0f5f2;
    --bg-mid-1: #e8f5f4;
    --bg-mid-2: #e5f2f5;
    --bg-end: #edf7f6;
    --glass-bg: rgba(255, 255, 255, 0.50);
    --glass-border: rgba(255, 255, 255, 0.58);
    --glass-shadow: 0 8px 32px rgba(20, 130, 130, 0.06);
    --text-primary: #1a3332;
    --text-secondary: #3d6b6a;
    --text-muted: #5e9492;
    --accent: #2ea8a0;
    --accent-light: #52c4bc;
    --accent-glow: rgba(46, 168, 160, 0.22);
    --card-bg: rgba(255, 255, 255, 0.42);
    --card-hover-bg: rgba(255, 255, 255, 0.68);
    --card-border: rgba(255, 255, 255, 0.48);
    --card-shadow: 0 4px 16px rgba(20, 130, 130, 0.05);
    --card-hover-shadow: 0 8px 28px rgba(20, 130, 130, 0.12);
    --nav-bg: rgba(237, 247, 246, 0.58);
    --nav-active: #2ea8a0;
    --search-bg: rgba(255, 255, 255, 0.58);
    --search-focus-bg: rgba(255, 255, 255, 0.84);
    --search-border: rgba(150, 210, 205, 0.42);
    --search-focus-border: rgba(46, 168, 160, 0.48);
    --footer-text: #5e9492;
    --dropdown-bg: rgba(255, 255, 255, 0.88);
    --dropdown-shadow: 0 8px 30px rgba(20, 130, 130, 0.12);
    --icon-color: #2ea8a0;
    --scrollbar-thumb: #a8d8d4;
    --card-hover-gradient: linear-gradient(135deg, rgba(46, 168, 160, 0.05), rgba(82, 196, 188, 0.03));
    --category-hover-bg: rgba(46, 168, 160, 0.08);
}

/* ============ 夜间模式 - 共享暗色背景 ============ */
html.night-mode {
    --bg-start: #1a1a24;
    --bg-mid-1: #1d1d2a;
    --bg-mid-2: #1c1c28;
    --bg-end: #181820;
    --glass-bg: rgba(30, 30, 48, 0.58);
    --glass-border: rgba(70, 65, 90, 0.32);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.28);
    --text-primary: #e4e0f0;
    --text-secondary: #b0a8c4;
    --text-muted: #6e6885;
    --card-bg: rgba(40, 38, 58, 0.45);
    --card-hover-bg: rgba(50, 48, 72, 0.65);
    --card-border: rgba(70, 65, 90, 0.28);
    --card-shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
    --card-hover-shadow: 0 8px 28px rgba(0, 0, 0, 0.32);
    --nav-bg: rgba(35, 34, 52, 0.60);
    --search-bg: rgba(40, 38, 58, 0.50);
    --search-focus-bg: rgba(50, 48, 72, 0.74);
    --search-border: rgba(70, 65, 90, 0.36);
    --footer-text: #6e6885;
    --dropdown-bg: rgba(35, 34, 52, 0.90);
    --dropdown-shadow: 0 8px 32px rgba(0, 0, 0, 0.38);
    --scrollbar-track: rgba(0, 0, 0, 0.08);
}

/* 夜间模式各主题强调色 */
html.night-mode[data-theme="purple"],
html.night-mode:not([data-theme]) {
    --accent: #a78bfa;
    --accent-light: #c4b5fd;
    --accent-glow: rgba(167, 139, 250, 0.28);
    --nav-active: #a78bfa;
    --search-focus-border: rgba(167, 139, 250, 0.45);
    --icon-color: #a78bfa;
    --scrollbar-thumb: #4a3870;
    --card-hover-gradient: linear-gradient(135deg, rgba(167, 139, 250, 0.08), rgba(196, 181, 253, 0.04));
    --category-hover-bg: rgba(167, 139, 250, 0.12);
}

html.night-mode[data-theme="blue"] {
    --accent: #8aade0;
    --accent-light: #a4c2f0;
    --accent-glow: rgba(138, 173, 224, 0.22);
    --nav-active: #8aade0;
    --search-focus-border: rgba(138, 173, 224, 0.42);
    --icon-color: #8aade0;
    --scrollbar-thumb: #3d4860;
    --card-hover-gradient: linear-gradient(135deg, rgba(138, 173, 224, 0.06), rgba(164, 194, 240, 0.03));
    --category-hover-bg: rgba(138, 173, 224, 0.10);
}

html.night-mode[data-theme="green"] {
    --accent: #6dbd7e;
    --accent-light: #8ed89c;
    --accent-glow: rgba(109, 189, 126, 0.24);
    --nav-active: #6dbd7e;
    --search-focus-border: rgba(109, 189, 126, 0.44);
    --icon-color: #6dbd7e;
    --scrollbar-thumb: #365840;
    --card-hover-gradient: linear-gradient(135deg, rgba(109, 189, 126, 0.06), rgba(142, 216, 156, 0.03));
    --category-hover-bg: rgba(109, 189, 126, 0.10);
}

html.night-mode[data-theme="pink"] {
    --accent: #e888a8;
    --accent-light: #f0a8c0;
    --accent-glow: rgba(232, 136, 168, 0.26);
    --nav-active: #e888a8;
    --search-focus-border: rgba(232, 136, 168, 0.44);
    --icon-color: #e888a8;
    --scrollbar-thumb: #603848;
    --card-hover-gradient: linear-gradient(135deg, rgba(232, 136, 168, 0.06), rgba(240, 168, 192, 0.03));
    --category-hover-bg: rgba(232, 136, 168, 0.10);
}

html.night-mode[data-theme="orange"] {
    --accent: #f0a868;
    --accent-light: #f6c088;
    --accent-glow: rgba(240, 168, 104, 0.26);
    --nav-active: #f0a868;
    --search-focus-border: rgba(240, 168, 104, 0.44);
    --icon-color: #f0a868;
    --scrollbar-thumb: #604830;
    --card-hover-gradient: linear-gradient(135deg, rgba(240, 168, 104, 0.06), rgba(246, 192, 136, 0.03));
    --category-hover-bg: rgba(240, 168, 104, 0.10);
}

html.night-mode[data-theme="teal"] {
    --accent: #52c4bc;
    --accent-light: #74d8d2;
    --accent-glow: rgba(82, 196, 188, 0.24);
    --nav-active: #52c4bc;
    --search-focus-border: rgba(82, 196, 188, 0.44);
    --icon-color: #52c4bc;
    --scrollbar-thumb: #2d5856;
    --card-hover-gradient: linear-gradient(135deg, rgba(82, 196, 188, 0.06), rgba(116, 216, 210, 0.03));
    --category-hover-bg: rgba(82, 196, 188, 0.10);
}

/* ---- Reset & Base ---- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    height: 100%;
    scroll-behavior: smooth;
    font-size: 16px;
    /* 关闭移动端点击时的默认蓝色高亮矩形 */
    -webkit-tap-highlight-color: transparent;
}

body {
    min-height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
        'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-primary);
    background: linear-gradient(160deg,
        var(--bg-start) 0%,
        var(--bg-mid-1) 28%,
        var(--bg-mid-2) 62%,
        var(--bg-end) 100%);
    background-attachment: fixed;
    transition: background 0.7s ease, color 0.4s ease;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { text-decoration: none; color: var(--accent); transition: color 0.25s ease; }
a:hover { color: var(--accent-light); }

/* ---- Background Layer ---- */
.bg-layer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    inset: 0; /* inset 简写为现代浏览器提供同等效果，上方四向声明作为旧浏览器降级 */
    z-index: -2;
    transition: background 0.8s ease;
}
.bg-layer.image-bg {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* ---- Main Wrapper ---- */
.main-wrapper {
    position: relative;
    z-index: 1;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ---- Top Bar ---- */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0;
    position: relative;
    /* 必须高于 .search-area(120)：top-bar 会形成独立的层叠上下文，
       否则内部的下拉面板再高的 z-index 也会被搜索栏盖住 */
    z-index: 200;
}

.top-bar-left, .top-bar-right {
    display: flex;
    align-items: center;
    gap: 6px;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    transition: opacity 0.3s ease;
}
.brand-link:hover {
    opacity: 0.8;
}
.brand-logo {
    height: 32px;
    width: auto;
}
.brand-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Icon Buttons */
.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.25s ease;
    background: transparent;
    border: none;
    font: inherit;
    -webkit-appearance: none;
    appearance: none;
    position: relative;
}
.icon-btn:hover {
    background: var(--card-bg);
    color: var(--accent);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* 交互控件与装饰性文字不参与文本选中，避免双击按钮时误选时钟等文本 */
.top-bar,
.clock-area,
.category-nav,
.search-engine-switcher,
.engine-options,
.search-suggestions {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* Palette Popover */
.palette-dropdown {
    position: relative;
}
.palette-popover {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translate(-50%, -8px);
    background: var(--dropdown-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 12px;
    padding: 8px 6px;
    box-shadow: var(--dropdown-shadow);
    border: 1px solid var(--glass-border);
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s ease;
    z-index: 200;
    white-space: nowrap;
}
/* 色板竖排：绝对定位的收缩宽度很窄，这里显式指定纵向排列，不依赖 flex-wrap 的副作用 */
.palette-popover .color-options {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 6px;
    padding: 0;
}
.palette-popover .color-opt {
    width: 26px;
    height: 26px;
}
.palette-dropdown:hover .palette-popover,
.palette-dropdown.open .palette-popover,
.palette-popover:hover {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, 0);
}

/* Dropdown */
.dropdown {
    position: relative;
}
.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 200px;
    background: var(--dropdown-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 16px;
    padding: 8px;
    box-shadow: var(--dropdown-shadow);
    border: 1px solid var(--glass-border);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.25s ease;
    z-index: 200;
}
.dropdown:hover .dropdown-menu,
.dropdown.open .dropdown-menu,
.dropdown-menu:hover {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-link {
    display: block;
    padding: 8px 12px;
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all 0.2s ease;
}
.dropdown-link:hover {
    background: var(--card-bg);
    color: var(--accent);
}

/* ---- 色彩选择器 ---- */
.color-options {
    display: flex;
    gap: 8px;
    padding: 2px 12px;
    flex-wrap: wrap;
}
.color-opt {
    width: 28px;
    height: 28px;
    padding: 0;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
    background-color: transparent;
    transition: all 0.2s ease;
    flex-shrink: 0;
    -webkit-appearance: none;
    appearance: none;
}
.color-opt:hover {
    transform: scale(1.15);
    border-color: var(--text-muted);
}
.color-opt.active {
    border-color: var(--text-primary);
    box-shadow: 0 0 0 2px var(--accent-glow);
}
/* 各色彩圆点 */
.color-opt[data-color="purple"] { background: #7c5cfc; }
.color-opt[data-color="blue"]   { background: #5b7fbd; }
.color-opt[data-color="green"]  { background: #4a9c5d; }
.color-opt[data-color="pink"]   { background: #d4608b; }
.color-opt[data-color="orange"] { background: #e08840; }
.color-opt[data-color="teal"]   { background: #2ea8a0; }

/* ---- Hero Section ---- */
.hero-section {
    text-align: center;
    padding: 30px 0 20px;
}

/* Clock */
.clock-area {
    margin-bottom: 10px;
}
.clock-time {
    font-size: 4rem;
    font-weight: 200;
    letter-spacing: 4px;
    color: var(--text-primary);
    line-height: 1.1;
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum";
}
.clock-date {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: 4px;
    letter-spacing: 1px;
}
.clock-greeting {
    font-size: 0.9rem;
    color: var(--accent);
    margin-top: 6px;
    font-weight: 500;
}

/* Yiyan */
.yiyan-text {
    margin: 14px 20px;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-style: italic;
}

/* ---- Search Area ---- */
.search-area {
    position: relative;
    z-index: 120;
    margin: 0 auto;
    max-width: 760px;
    width: calc(100% - 40px);
}

.search-form {
    margin: 0;
}

/* 搜索引擎下拉列表 */
.engine-options {
    position: absolute;
    top: calc(100% + 8px);
    right: 8px;
    left: auto;
    min-width: 186px;
    max-width: calc(100vw - 48px);
    max-height: 300px;
    overflow-y: auto;
    padding: 5px;
    background: var(--dropdown-bg);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    box-shadow: var(--dropdown-shadow);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 170;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px) scale(0.98);
    transform-origin: top right;
    transition: opacity 0.18s ease, transform 0.18s ease;
}
.engine-options.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}
.engine-option {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 7px 8px;
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.85rem;
    line-height: 1.2;
    transition: background 0.18s ease, color 0.18s ease;
}
.engine-option:hover {
    background: var(--category-hover-bg);
}
.engine-option.active {
    color: var(--accent);
    background: var(--category-hover-bg);
}
.engine-option input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}
.engine-option-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}
.engine-options .engine-option-icon svg,
.engine-options .engine-option-icon img {
    width: 16px;
    height: 16px;
    display: block;
}
.engine-option-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}
.engine-option-check {
    flex-shrink: 0;
    width: 12px;
    height: 12px;
    opacity: 0;
    color: var(--accent);
    transition: opacity 0.15s ease;
}
.engine-option.active .engine-option-check {
    opacity: 1;
}

.search-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--search-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1.5px solid var(--search-border);
    border-radius: 18px;
    padding: 6px 6px 6px 18px;
    gap: 10px;
    transition: all 0.35s ease;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
}
.search-wrapper:focus-within {
    background: var(--search-focus-bg);
    border-color: var(--search-focus-border);
    box-shadow: 0 4px 24px var(--accent-glow);
    transform: translateY(-1px);
}

.search-engine-switcher {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 10px;
    border-radius: 14px;
    cursor: pointer;
    transition: background 0.2s ease;
    flex-shrink: 0;
}
.search-engine-switcher:hover,
.search-engine-switcher.open {
    background: var(--category-hover-bg);
}

.engine-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
}
.engine-icon svg, .engine-icon img {
    width: 22px;
    height: 22px;
    display: block;
}
.engine-arrow {
    color: var(--text-muted);
    transition: transform 0.2s ease;
}
.search-engine-switcher.open .engine-arrow {
    transform: rotate(180deg);
}

.search-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 10px 0;
    font-size: 1rem;
    color: var(--text-primary);
    outline: none;
    min-width: 0;
}
.search-input::placeholder {
    color: var(--text-muted);
    transition: color 0.3s ease;
}

.search-actions {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    border-radius: 14px;
    overflow: hidden;
    background: var(--accent);
    box-shadow: 0 6px 18px var(--accent-glow);
}
.search-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-width: 96px;
    height: 46px;
    padding: 0 14px;
    border: none;
    border-radius: 0;
    background: transparent;
    color: #fff;
    cursor: pointer;
    transition: opacity 0.2s ease;
    flex-shrink: 0;
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
}
.search-btn:hover {
    opacity: 0.92;
}
.search-btn .engine-icon {
    width: 20px;
    height: 20px;
}
.search-btn .engine-icon svg,
.search-btn .engine-icon img {
    width: 20px;
    height: 20px;
}
.engine-label {
    max-width: 96px;
    overflow: hidden;
    text-overflow: ellipsis;
}
.search-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 46px;
    border: 0;
    border-left: 1px solid rgba(255, 255, 255, 0.28);
    background: transparent;
    color: #fff;
    cursor: pointer;
    flex-shrink: 0;
}
.search-toggle:hover {
    background: rgba(255, 255, 255, 0.12);
}
.search-toggle .engine-arrow {
    color: #fff;
}
.search-toggle.open .engine-arrow {
    transform: rotate(180deg);
}
.engine-divider {
    height: 1px;
    margin: 4px 6px;
    background: var(--glass-border);
}

.search-suggestions {
    position: absolute;
    top: calc(100% + 8px);
    left: 12px;
    right: 12px;
    background: var(--dropdown-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 16px;
    padding: 8px;
    list-style: none;
    display: none;
    box-shadow: var(--dropdown-shadow);
    border: 1px solid var(--glass-border);
    z-index: 150;
    text-align: left;
}
.search-suggestions.show {
    display: block;
}
.search-suggestions li {
    padding: 8px 16px;
    border-radius: 10px;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: background 0.2s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}
.search-suggestions li:hover {
    background: var(--card-bg);
}
.search-suggestions li.active {
    color: var(--accent);
    background: var(--category-hover-bg);
}
.search-suggestions li.local-result {
    padding: 8px 12px;
}
.search-suggestions li.local-result .lr-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.search-suggestions li.local-result .lr-icon svg,
.search-suggestions li.local-result .lr-icon img {
    width: 20px;
    height: 20px;
    display: block;
    border-radius: 4px;
}
.search-suggestions li.local-result .lr-text {
    display: flex;
    flex-direction: column;
    min-width: 0;
    gap: 1px;
}
.search-suggestions li.local-result .lr-name {
    font-size: 0.9rem;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.search-suggestions li.local-result .lr-group {
    font-size: 0.72rem;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.search-suggestions li.local-result.active .lr-name {
    color: var(--accent);
}
.search-suggestions li.local-empty {
    justify-content: center;
    color: var(--text-muted);
    cursor: default;
}

/* ---- Nav Section ---- */
.nav-section {
    flex: 1;
    margin-top: 8px;
    padding-bottom: 20px;
}

/* Category Navigation */
.category-nav {
    margin-bottom: 20px;
    position: sticky;
    top: 0;
    z-index: 50;
    padding: 8px 0;
}

.category-scroll {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding: 4px;
    background: var(--nav-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    -ms-overflow-style: none;
    scrollbar-width: none;
}
.category-scroll::-webkit-scrollbar {
    display: none;
}

/* 桌面端分类较多时自动换行，避免第 12 个分类被横向滚动藏起来 */
@media (min-width: 769px) {
    .category-scroll {
        flex-wrap: wrap;
        overflow-x: visible;
    }
}

.category-item {
    display: inline-block;
    padding: 8px 20px;
    border-radius: 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.25s ease;
    font-weight: 500;
    flex-shrink: 0;
    background: transparent;
    border: 0;
    font-family: inherit;
    -webkit-appearance: none;
    appearance: none;
}
.category-item:hover {
    color: var(--accent);
    background: var(--category-hover-bg);
}
.category-item.active {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 12px var(--accent-glow);
}

/* ---- Link Groups ---- */
.links-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.links-container.is-all .link-item-wrapper[data-dup="1"] {
    display: none;
}

.link-group {
    transition: opacity 0.3s ease;
}

.group-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
    padding-left: 4px;
}
.group-icon svg, .group-icon img {
    width: 22px;
    height: 22px;
    vertical-align: middle;
}
.group-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.3px;
}

.group-links {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 10px;
}

.link-item-wrapper {
    min-width: 0;
}

/* Link Card */
.link-card {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    box-sizing: border-box;
    padding: 12px 14px;
    border-radius: 14px;
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    color: var(--text-primary);
    text-decoration: none;
    overflow: hidden;
    white-space: nowrap;
    position: relative;
    min-width: 0;
}
.link-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 14px;
    opacity: 0;
    background: var(--card-hover-gradient);
    transition: opacity 0.3s ease;
}
.link-card:hover {
    background: var(--card-hover-bg);
    transform: translateY(-2px);
    box-shadow: var(--card-hover-shadow);
    border-color: var(--accent-light);
    color: var(--accent);
}
.link-card:hover::before {
    opacity: 1;
}

.link-card-icon {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.link-card-icon svg, .link-card-icon img {
    width: 22px;
    height: 22px;
    vertical-align: middle;
}
svg.icon {
    width: 22px;
    height: 22px;
    vertical-align: middle;
}

.link-card-name {
    font-size: 0.875rem;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ---- Footer ---- */
.site-footer {
    margin-top: auto;
    padding: 20px 0;
    text-align: center;
    border-top: 1px solid var(--glass-border);
}
.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px 18px;
    font-size: 0.75rem;
    color: var(--footer-text);
}
.footer-item {
    display: inline-flex;
    align-items: center;
}
.footer-item .icp,
.footer-item .gonganbei {
    color: var(--footer-text);
    transition: color 0.2s ease;
}
.footer-item .icp:hover,
.footer-item .gonganbei:hover {
    color: var(--accent);
}

/* ---- Responsive ---- */
@media (max-width: 1300px) {
    .group-links {
        grid-template-columns: repeat(6, 1fr);
    }
}
@media (max-width: 1024px) {
    .group-links {
        grid-template-columns: repeat(4, 1fr);
    }
    .clock-time {
        font-size: 3rem;
    }
}
@media (max-width: 768px) {
    .main-wrapper {
        padding: 0 14px;
    }
    .group-links {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }
    .clock-time {
        font-size: 2.5rem;
    }
    .clock-date {
        font-size: 0.9rem;
    }
    .search-area {
        width: 100%;
    }
    .category-scroll {
        border-radius: 12px;
    }
    .category-item {
        padding: 6px 14px;
        font-size: 0.82rem;
    }
    .link-card {
        padding: 10px 12px;
    }
    .link-card-name {
        font-size: 0.8rem;
    }
    .hero-section {
        padding: 16px 0 10px;
    }
    .top-bar {
        padding: 12px 0;
    }
}
@media (max-width: 480px) {
    .group-links {
        grid-template-columns: repeat(3, 1fr);
        gap: 6px;
    }
    .clock-time {
        font-size: 2rem;
    }
    .link-card {
        padding: 10px;
        border-radius: 12px;
    }
    .link-card-icon {
        width: 18px;
        height: 18px;
    }
    .link-card-icon svg, .link-card-icon img {
        width: 18px;
        height: 18px;
    }
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}
::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}
::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-light);
}

/* ---- Animations ---- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.link-group {
    animation: fadeInUp 0.5s ease backwards;
}
.link-group:nth-child(1) { animation-delay: 0.05s; }
.link-group:nth-child(2) { animation-delay: 0.1s; }
.link-group:nth-child(3) { animation-delay: 0.15s; }
.link-group:nth-child(4) { animation-delay: 0.2s; }
.link-group:nth-child(5) { animation-delay: 0.25s; }

/* ---- Selection ---- */
::selection {
    background: var(--accent-light);
    color: #fff;
}

/* ---- 键盘焦点可见（无障碍） ---- */
.icon-btn:focus-visible,
.color-opt:focus-visible,
.category-item:focus-visible,
.search-engine-switcher:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}
.engine-option:focus-within {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}

/* ---- 毛玻璃降级：不支持 backdrop-filter 时提高底色不透明度，保证文字可读 ---- */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
    .icon-btn:hover {
        background: var(--card-hover-bg);
    }
    .search-wrapper {
        background: var(--search-focus-bg);
    }
    .palette-popover,
    .dropdown-menu,
    .engine-options {
        background: var(--dropdown-bg);
        box-shadow: var(--dropdown-shadow);
    }
}

/* ---- 首页顶部广告位 ---- */
.nav-ad {
    margin: 0 0 20px;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
    background: var(--nav-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
    line-height: 0;
}
.nav-ad a {
    display: block;
}
.nav-ad img {
    display: block;
    width: 100%;
    height: auto;
    max-height: 160px;
    object-fit: cover;
}

/* ---- 二级分组 ---- */
.link-subgroup {
    margin-top: 22px;
    padding-left: 12px;
    border-left: 2px solid var(--glass-border);
}
.subgroup-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 10px 4px;
}
.subgroup-icon svg,
.subgroup-icon img {
    width: 18px;
    height: 18px;
    vertical-align: middle;
}
.subgroup-title {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.3px;
}

@media (max-width: 768px) {
    .nav-ad img {
        max-height: 110px;
    }
}

/* ---- 搜索条移动端 ---- */
@media (max-width: 640px) {
    .search-area {
        max-width: 100%;
        width: calc(100% - 24px);
    }
    .search-wrapper {
        padding: 5px 5px 5px 14px;
        gap: 8px;
    }
    .search-btn {
        min-width: 0;
        padding: 0 12px;
    }
    .engine-label {
        display: none;
    }
    .search-toggle {
        width: 34px;
    }
    .search-suggestions {
        left: 4px;
        right: 4px;
    }
    .engine-options {
        right: 4px;
    }
}