/* 占位提示（原先用内联 style，为满足严格 CSP 移到样式表） */
.empty-hint {
    text-align: center;
    color: var(--text-secondary);
    padding: 30px;
    font-size: 13px;
}

/* 提示条（原先是元素上的内联 style，为满足严格 CSP 移到样式表，显隐由 .show 类控制） */
#toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: rgba(17, 24, 39, 0.95);
    border: 1px solid var(--accent-cyan);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    z-index: 9999;
    transition: transform 0.3s ease;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 40px rgba(0, 245, 255, 0.2);
}

#toast.show {
    transform: translateX(-50%) translateY(0);
}

/* Orbitron 本地化（仅拉丁子集，避免依赖 Google Fonts） */
@font-face {
    font-family: 'Orbitron';
    font-style: normal;
    font-weight: 400 700;
    font-display: swap;
    src: url('fonts/orbitron.woff2') format('woff2');
}

:root {
            --bg-primary: #0a0e17;
            --bg-secondary: #111827;
            --bg-card: rgba(17, 24, 39, 0.8);
            --accent-cyan: #00f5ff;
            --accent-purple: #a855f7;
            --accent-pink: #ec4899;
            --accent-green: #10b981;
            --accent-orange: #f59e0b;
            --text-primary: #f9fafb;
            --text-secondary: #9ca3af;
            --border-glow: rgba(0, 245, 255, 0.3);
            --grid-opacity: 0.03;
            --orb-opacity: 0.15;
        }

        /* 亮白主题 */
        [data-theme="light"] {
            --bg-primary: #f8fafc;
            --bg-secondary: #ffffff;
            --bg-card: rgba(255, 255, 255, 0.9);
            --accent-cyan: #0891b2;
            --accent-purple: #9333ea;
            --accent-pink: #db2777;
            --accent-green: #059669;
            --accent-orange: #d97706;
            --text-primary: #1e293b;
            --text-secondary: #64748b;
            --border-glow: rgba(8, 145, 178, 0.3);
            --grid-opacity: 0.06;
            --orb-opacity: 0.08;
        }

        /* 主题过渡动画 */
        /* 主题切换时才挂过渡，避免全站元素常驻 transition 造成渲染开销 */
        html.theme-transition,
        html.theme-transition *,
        html.theme-transition *::before,
        html.theme-transition *::after {
            transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease !important;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Source Han Sans SC', 'Noto Sans CJK SC', sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            min-height: 100vh;
        }

        .bg-grid {
            position: fixed;
            top: 0; left: 0;
            width: 100%; height: 100%;
            background-image:
                linear-gradient(rgba(0, 245, 255, var(--grid-opacity)) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 245, 255, var(--grid-opacity)) 1px, transparent 1px);
            background-size: 50px 50px;
            pointer-events: none;
            z-index: 0;
        }

        .floating-orb {
            position: fixed;
            border-radius: 50%;
            filter: blur(80px);
            pointer-events: none;
            z-index: 0;
            animation: float 20s ease-in-out infinite;
        }
        .orb-1 {
            width: 400px; height: 400px;
            background: radial-gradient(circle, rgba(0, 245, 255, var(--orb-opacity)), transparent 70%);
            top: -100px; right: -100px;
        }
        .orb-2 {
            width: 300px; height: 300px;
            background: radial-gradient(circle, rgba(168, 85, 247, var(--orb-opacity)), transparent 70%);
            bottom: 20%; left: -100px;
            animation-delay: -7s;
        }
        .orb-3 {
            width: 250px; height: 250px;
            background: radial-gradient(circle, rgba(236, 72, 153, calc(var(--orb-opacity) * 0.7)), transparent 70%);
            top: 50%; right: 10%;
            animation-delay: -14s;
        }

        @keyframes float {
            0%, 100% { transform: translate(0, 0) scale(1); }
            25% { transform: translate(30px, -30px) scale(1.05); }
            50% { transform: translate(-20px, 20px) scale(0.95); }
            75% { transform: translate(20px, 10px) scale(1.02); }
        }

        .container {
            position: relative;
            z-index: 1;
            max-width: 480px;
            margin: 0 auto;
            padding: 20px 16px 40px;
        }

        .header {
            text-align: center;
            padding: 40px 0 30px;
        }

        .header-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            background: linear-gradient(135deg, rgba(0, 245, 255, 0.1), rgba(168, 85, 247, 0.1));
            border: 1px solid var(--border-glow);
            border-radius: 20px;
            font-size: 12px;
            color: var(--accent-cyan);
            margin-bottom: 16px;
            animation: pulse-glow 3s ease-in-out infinite;
        }

        /* 主题切换按钮 */
        .theme-toggle {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 1000;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            border: 1px solid var(--border-glow);
            background: var(--bg-card);
            backdrop-filter: blur(10px);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }
        .theme-toggle:hover {
            transform: scale(1.1) rotate(15deg);
            box-shadow: 0 8px 30px rgba(0, 245, 255, 0.3);
        }
        [data-theme="light"] .theme-toggle {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        }

        .badge-dot {
            width: 6px; height: 6px;
            background: var(--accent-cyan);
            border-radius: 50%;
            animation: blink 2s ease-in-out infinite;
        }

        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

        @keyframes pulse-glow {
            0%, 100% { box-shadow: 0 0 20px rgba(0, 245, 255, 0.2); }
            50% { box-shadow: 0 0 30px rgba(0, 245, 255, 0.4); }
        }

        .header h1 {
            font-family: 'Orbitron', ui-monospace, 'SF Mono', Consolas, Monaco, 'Courier New', monospace;
            font-size: 28px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: 2px;
            margin-bottom: 8px;
        }

        .header p {
            font-size: 14px;
            color: var(--text-secondary);
        }
        .search-box {
            margin-top: 20px;
            max-width: 400px;
            margin-left: auto;
            margin-right: auto;
        }
        .search-box {
            display: flex;
            gap: 10px;
            align-items: center;
        }
        .search-box input {
            flex: 1;
            padding: 14px 20px;
            border-radius: 25px;
            border: 1px solid rgba(0, 245, 255, 0.3);
            background: rgba(0, 245, 255, 0.05);
            color: #fff;
            font-size: 14px;
            outline: none;
            transition: all 0.3s;
        }
        .search-box input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 245, 255, 0.3);
            background: rgba(0, 245, 255, 0.1);
        }
        .search-box input::placeholder { color: rgba(255,255,255,0.4); }
        .search-btn {
            padding: 12px 18px;
            border-radius: 25px;
            border: 1px solid rgba(0, 245, 255, 0.3);
            background: rgba(0, 245, 255, 0.1);
            color: var(--accent-cyan);
            font-size: 16px;
            cursor: pointer;
            transition: all 0.3s;
        }
        .search-btn:hover {
            background: rgba(0, 245, 255, 0.25);
            border-color: var(--accent-cyan);
            transform: scale(1.05);
        }

        .section {
            margin-bottom: 30px;
        }

        .section-title {
            font-family: 'Orbitron', ui-monospace, 'SF Mono', Consolas, Monaco, 'Courier New', monospace;
            font-size: 12px;
            /* 板块标题已由 div 改为 h2（语义化，利于 SEO），补回字重避免 h2 默认粗体改变观感 */
            font-weight: 400;
            color: var(--accent-cyan);
            letter-spacing: 3px;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .section-title::before {
            content: '';
            width: 20px; height: 1px;
            background: var(--accent-cyan);
        }

        .section-title::after {
            content: '';
            flex: 1; height: 1px;
            background: linear-gradient(90deg, var(--border-glow), transparent);
        }

        .info-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .info-card {
            background: var(--bg-card);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: 16px;
            padding: 20px 16px;
            text-align: center;
            backdrop-filter: blur(10px);
            transition: all 0.3s ease;
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }
        .info-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
            opacity: 0;
            transition: opacity 0.3s;
        }
        .info-card:hover::before { opacity: 1; }
        .info-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-glow);
            box-shadow: 0 10px 40px rgba(0, 245, 255, 0.15);
        }
        .info-card.pulse { animation: cardPulse 0.4s ease; }
        @keyframes cardPulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.08); box-shadow: 0 25px 50px rgba(0, 245, 255, 0.5); }
        }
        .info-card .icon { font-size: 28px; margin-bottom: 10px; display: block; }
        .info-card .title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .info-card .desc {
            font-size: 11px;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.4;
        }
        .info-card .arrow {
            position: absolute;
            bottom: 12px;
            right: 12px;
            font-size: 16px;
            opacity: 0;
            transform: translateX(-5px);
            transition: all 0.3s;
        }
        .info-card:hover .arrow { opacity: 1; transform: translateX(0); }

        .link-card {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--bg-card);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: 16px;
            padding: 18px 20px;
            margin-bottom: 12px;
            backdrop-filter: blur(10px);
            text-decoration: none;
            color: inherit;
            position: relative;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .link-card::before {
            content: '';
            position: absolute;
            left: 0; top: 0; bottom: 0;
            width: 3px;
            background: var(--accent-cyan);
            opacity: 0;
            transition: opacity 0.3s;
        }

        .link-card:hover::before { opacity: 1; }

        .link-card:hover {
            transform: translateX(6px);
            border-color: var(--border-glow);
            background: rgba(0, 245, 255, 0.05);
        }

        .link-icon {
            width: 48px; height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            flex-shrink: 0;
        }

        .link-icon.cyan { background: rgba(0, 245, 255, 0.15); }
        .link-icon.purple { background: rgba(168, 85, 247, 0.15); }
        .link-icon.pink { background: rgba(236, 72, 153, 0.15); }
        .link-icon.green { background: rgba(16, 185, 129, 0.15); }
        .link-icon.orange { background: rgba(245, 158, 11, 0.15); }

        .link-content { flex: 1; min-width: 0; }
        .link-title { font-size: 16px; font-weight: 500; margin-bottom: 4px; }
        .link-desc { font-size: 12px; color: var(--text-secondary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
        .link-arrow { color: var(--text-secondary); font-size: 18px; transition: transform 0.3s; }
        .link-card:hover .link-arrow { transform: translateX(4px); color: var(--accent-cyan); }

        /* ===== 沐丰应用密集网格 ===== */
        .links-compact-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(95px, 1fr));
            gap: 10px;
        }
        .links-compact-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
            padding: 14px 6px 12px;
            background: var(--bg-card);
            border: 1px solid rgba(255,255,255,0.05);
            border-radius: 14px;
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .links-compact-item::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple), var(--accent-pink));
            opacity: 0;
            transition: opacity 0.3s;
        }
        .links-compact-item:hover::before { opacity: 1; }
        .links-compact-item:hover {
            transform: translateY(-3px);
            border-color: rgba(0,245,255,0.25);
            background: rgba(0,245,255,0.05);
            box-shadow: 0 4px 16px rgba(0,245,255,0.1);
        }
        .links-compact-icon {
            width: 38px; height: 38px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
        }
        .links-compact-icon.cyan { background: rgba(0,245,255,0.15); }
        .links-compact-icon.purple { background: rgba(168,85,247,0.15); }
        .links-compact-icon.pink { background: rgba(236,72,153,0.15); }
        .links-compact-icon.green { background: rgba(16,185,129,0.15); }
        .links-compact-icon.orange { background: rgba(245,158,11,0.15); }
        .links-compact-title {
            font-size: 12px;
            font-weight: 500;
            text-align: center;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 100%;
        }

        /* ===== 分类板块排版样式 ===== */

        /* 1. 列表样式 (list) — 默认，已定义于 .link-card / .links-grid */
        .links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 12px;
        }

        /* 2. 网格样式 (grid) — 已定义于 .info-grid / .info-card */

        /* 3. 卡片样式 (card) — 紧凑圆角卡片，图标突出 */
        .cat-card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(175px, 1fr));
            gap: 18px;
        }
        .cat-card-item {
            background: var(--bg-card);
            border: 1px solid rgba(255,255,255,0.06);
            border-radius: 22px;
            padding: 28px 18px 22px;
            text-align: center;
            text-decoration: none;
            color: inherit;
            position: relative;
            overflow: hidden;
            transition: all 0.35s cubic-bezier(.4,0,.2,1);
            cursor: pointer;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
        }
        .cat-card-item::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), rgba(168,85,247,0.7), rgba(236,72,153,0.5));
            opacity: 0;
            transition: opacity 0.35s;
        }
        .cat-card-item::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: 22px;
            background: radial-gradient(circle at 50% 0%, rgba(0,245,255,0.1), transparent 70%);
            opacity: 0;
            transition: opacity 0.35s;
        }
        .cat-card-item:hover::before { opacity: 1; }
        .cat-card-item:hover::after { opacity: 1; }
        .cat-card-item:hover {
            transform: translateY(-8px) scale(1.03);
            box-shadow: 0 12px 40px rgba(0,245,255,0.18), 0 0 60px rgba(168,85,247,0.08);
            border-color: rgba(0,245,255,0.25);
        }
        .cat-card-item .card-icon {
            font-size: 40px;
            width: 68px; height: 68px;
            display: flex; align-items: center; justify-content: center;
            background: linear-gradient(135deg, rgba(0,245,255,0.12), rgba(168,85,247,0.12));
            border-radius: 20px;
            margin-bottom: 6px;
            position: relative;
            z-index: 1;
            transition: transform 0.35s cubic-bezier(.4,0,.2,1);
        }
        .cat-card-item:hover .card-icon {
            transform: scale(1.12) rotate(-3deg);
        }
        .cat-card-item .card-title {
            font-size: 15px;
            font-weight: 600;
            position: relative; z-index: 1;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 100%;
        }
        .cat-card-item .card-desc {
            font-size: 12px;
            color: var(--text-secondary);
            position: relative; z-index: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.5;
        }

        /* 4. 徽章/标签云样式 (badge) */
        .cat-badge-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .cat-badge-item {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--bg-card);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: 44px;
            padding: 10px 22px 10px 12px;
            text-decoration: none;
            color: inherit;
            transition: all 0.35s cubic-bezier(.4,0,.2,1);
            cursor: pointer;
            white-space: nowrap;
            position: relative;
            overflow: hidden;
        }
        .cat-badge-item::before {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: 44px;
            background: linear-gradient(135deg, rgba(0,245,255,0.06), rgba(168,85,247,0.06));
            opacity: 0;
            transition: opacity 0.35s;
        }
        .cat-badge-item:hover::before { opacity: 1; }
        .cat-badge-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 24px rgba(0,245,255,0.2), inset 0 0 20px rgba(0,245,255,0.03);
            transform: translateY(-3px) scale(1.05);
        }
        .cat-badge-item .badge-icon {
            width: 34px; height: 34px;
            display: flex; align-items: center; justify-content: center;
            font-size: 18px;
            background: linear-gradient(135deg, rgba(0,245,255,0.18), rgba(168,85,247,0.18));
            border-radius: 50%;
            position: relative;
            z-index: 1;
            transition: transform 0.3s;
        }
        .cat-badge-item:hover .badge-icon {
            transform: rotate(8deg) scale(1.1);
        }
        .cat-badge-item .badge-title {
            font-size: 15px;
            font-weight: 600;
            position: relative;
            z-index: 1;
        }

        /* 5. 时间线样式 (timeline) */
        .cat-timeline {
            position: relative;
            padding-left: 36px;
        }
        .cat-timeline::before {
            content: '';
            position: absolute;
            left: 10px; top: 10px; bottom: 10px;
            width: 3px;
            background: linear-gradient(180deg, var(--accent-cyan), rgba(168,85,247,0.6), rgba(236,72,153,0.4));
            border-radius: 3px;
        }
        .cat-timeline-item {
            position: relative;
            display: flex;
            align-items: center;
            gap: 18px;
            background: var(--bg-card);
            border: 1px solid rgba(255,255,255,0.05);
            border-radius: 18px;
            padding: 18px 22px;
            margin-bottom: 14px;
            text-decoration: none;
            color: inherit;
            transition: all 0.35s cubic-bezier(.4,0,.2,1);
            cursor: pointer;
        }
        .cat-timeline-item::before {
            content: '';
            position: absolute;
            left: -30px; top: 50%;
            transform: translateY(-50%);
            width: 14px; height: 14px;
            border-radius: 50%;
            background: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(0,245,255,0.6), 0 0 24px rgba(0,245,255,0.2);
            border: 2px solid var(--bg-card);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .cat-timeline-item:hover::before {
            transform: translateY(-50%) scale(1.3);
            box-shadow: 0 0 18px rgba(0,245,255,0.8), 0 0 36px rgba(0,245,255,0.3);
        }
        .cat-timeline-item::after {
            content: '';
            position: absolute;
            left: 0; top: 0; bottom: 0; width: 3px;
            background: linear-gradient(180deg, var(--accent-cyan), rgba(168,85,247,0.5));
            border-radius: 3px 0 0 3px;
            opacity: 0;
            transition: opacity 0.35s;
        }
        .cat-timeline-item:hover::after { opacity: 1; }
        .cat-timeline-item:hover {
            border-color: rgba(0,245,255,0.2);
            transform: translateX(8px);
            box-shadow: 0 6px 28px rgba(0,245,255,0.12);
            background: linear-gradient(135deg, var(--bg-card), rgba(0,245,255,0.03));
        }
        .cat-timeline-item .tl-icon {
            font-size: 26px;
            width: 50px; height: 50px;
            display: flex; align-items: center; justify-content: center;
            background: linear-gradient(135deg, rgba(0,245,255,0.1), rgba(168,85,247,0.1));
            border-radius: 14px;
            flex-shrink: 0;
            transition: transform 0.3s;
        }
        .cat-timeline-item:hover .tl-icon {
            transform: scale(1.1);
        }
        .cat-timeline-item .tl-content { flex: 1; min-width: 0; }
        .cat-timeline-item .tl-title { font-size: 16px; font-weight: 600; }
        .cat-timeline-item .tl-desc {
            font-size: 13px; color: var(--text-secondary);
            white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
            margin-top: 2px;
        }
        .cat-timeline-item .tl-arrow {
            color: var(--text-secondary); font-size: 18px; transition: all 0.3s;
        }
        .cat-timeline-item:hover .tl-arrow { transform: translateX(6px); color: var(--accent-cyan); }

        /* 6. 横向滚动样式 (carousel) */
        .cat-carousel {
            display: flex;
            gap: 18px;
            overflow-x: auto;
            padding: 8px 4px 14px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }
        .cat-carousel::-webkit-scrollbar {
            height: 5px;
        }
        .cat-carousel::-webkit-scrollbar-track {
            background: rgba(255,255,255,0.03);
            border-radius: 5px;
        }
        .cat-carousel::-webkit-scrollbar-thumb {
            background: linear-gradient(90deg, rgba(0,245,255,0.3), rgba(168,85,247,0.3));
            border-radius: 5px;
        }
        .cat-carousel-item {
            flex: 0 0 210px;
            background: var(--bg-card);
            border: 1px solid rgba(255,255,255,0.06);
            border-radius: 22px;
            padding: 30px 20px 24px;
            text-align: center;
            text-decoration: none;
            color: inherit;
            position: relative;
            overflow: hidden;
            transition: all 0.35s cubic-bezier(.4,0,.2,1);
            cursor: pointer;
            scroll-snap-align: start;
        }
        .cat-carousel-item::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; height: 4px;
            background: linear-gradient(90deg, var(--accent-cyan), rgba(168,85,247,0.7), rgba(236,72,153,0.5));
            opacity: 0;
            transition: opacity 0.35s;
        }
        .cat-carousel-item::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: 22px;
            background: radial-gradient(circle at 50% 0%, rgba(0,245,255,0.08), transparent 70%);
            opacity: 0;
            transition: opacity 0.35s;
        }
        .cat-carousel-item:hover::before { opacity: 1; }
        .cat-carousel-item:hover::after { opacity: 1; }
        .cat-carousel-item:hover {
            transform: translateY(-8px) scale(1.03);
            box-shadow: 0 12px 40px rgba(0,245,255,0.18), 0 0 60px rgba(168,85,247,0.06);
            border-color: rgba(0,245,255,0.25);
        }
        .cat-carousel-item .crs-icon {
            font-size: 38px;
            margin-bottom: 14px;
            display: block;
            transition: transform 0.35s cubic-bezier(.4,0,.2,1);
        }
        .cat-carousel-item:hover .crs-icon {
            transform: scale(1.15) rotate(-5deg);
        }
        .cat-carousel-item .crs-title {
            font-size: 15px; font-weight: 600;
            margin-bottom: 6px;
            white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
            position: relative; z-index: 1;
        }
        .cat-carousel-item .crs-desc {
            font-size: 12px;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.5;
            position: relative; z-index: 1;
        }

        /* 7. 密集网格样式 (compact) — 专为大量链接设计 */
        .cat-compact-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
            gap: 8px;
        }
        .cat-compact-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            background: var(--bg-card);
            border: 1px solid rgba(255,255,255,0.04);
            border-radius: 12px;
            padding: 12px 6px 10px;
            text-decoration: none;
            color: inherit;
            transition: all 0.25s cubic-bezier(.4,0,.2,1);
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }
        .cat-compact-item::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: 12px;
            background: radial-gradient(circle at 50% 20%, rgba(0,245,255,0.08), transparent 70%);
            opacity: 0;
            transition: opacity 0.25s;
        }
        .cat-compact-item:hover::after { opacity: 1; }
        .cat-compact-item:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0,245,255,0.1);
            border-color: rgba(0,245,255,0.15);
        }
        .cat-compact-item .cmp-icon {
            font-size: 26px;
            width: 40px; height: 40px;
            display: flex; align-items: center; justify-content: center;
            background: linear-gradient(135deg, rgba(0,245,255,0.08), rgba(168,85,247,0.08));
            border-radius: 10px;
            position: relative;
            z-index: 1;
            transition: transform 0.25s;
        }
        .cat-compact-item:hover .cmp-icon {
            transform: scale(1.1);
        }
        .cat-compact-item .cmp-title {
            font-size: 11px;
            font-weight: 500;
            text-align: center;
            position: relative; z-index: 1;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 100%;
            line-height: 1.3;
        }

        .action-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 12px;
        }

        .action-btn {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            padding: 16px 8px;
            background: var(--bg-card);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: 12px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .action-btn:hover {
            background: rgba(0, 245, 255, 0.1);
            border-color: var(--border-glow);
            transform: translateY(-2px);
        }

        .action-icon {
            width: 40px; height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
        }

        .action-label { font-size: 11px; color: var(--text-secondary); }

        /* 星夜蝌蚪入口 - 大卡片 */
        .starry-tadpole-card {
            display: block;
            position: relative;
            border-radius: 20px;
            padding: 28px 32px;
            margin-bottom: 24px;
            text-decoration: none;
            color: var(--text-primary);
            background: linear-gradient(135deg, rgba(25, 25, 112, 0.15), rgba(138, 43, 226, 0.15));
            border: 1px solid rgba(138, 43, 226, 0.3);
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .starry-tadpole-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 30% 20%, rgba(138, 43, 226, 0.2) 0%, transparent 50%),
                        radial-gradient(circle at 70% 80%, rgba(25, 25, 112, 0.2) 0%, transparent 50%);
            z-index: -1;
        }
        .starry-tadpole-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(138, 43, 226, 0.1), rgba(25, 25, 112, 0.1));
            z-index: -2;
        }
        .starry-tadpole-card:hover {
            background: linear-gradient(135deg, rgba(138, 43, 226, 0.2), rgba(25, 25, 112, 0.2));
            border-color: rgba(138, 43, 226, 0.5);
            transform: translateY(-2px);
        }
        .starry-tadpole-card:hover::before {
            opacity: 1;
        }
        .starry-tadpole-card-top {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 12px;
        }
        .starry-tadpole-card-icon {
            font-size: 32px;
            width: 60px; height: 60px;
            display: flex; align-items: center; justify-content: center;
            background: linear-gradient(135deg, rgba(138, 43, 226, 0.2), rgba(25, 25, 112, 0.2));
            border: 1px solid rgba(138, 43, 226, 0.3);
            border-radius: 16px;
            position: relative;
            z-index: 1;
        }
        .starry-tadpole-card-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-primary);
        }
        .starry-tadpole-card-badge {
            font-size: 11px;
            padding: 4px 12px;
            background: rgba(138, 43, 226, 0.2);
            border: 1px solid rgba(138, 43, 226, 0.4);
            border-radius: 12px;
            color: rgba(138, 43, 226, 0.9);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .starry-tadpole-card-badge .pulse-dot {
            width: 6px; height: 6px;
            background: rgba(138, 43, 226, 0.9);
            border-radius: 50%;
            animation: pulse 2s infinite;
        }
        .starry-tadpole-card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.5;
            margin-bottom: 16px;
        }
        .starry-tadpole-card-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .starry-tadpole-card-tags {
            display: flex;
            gap: 8px;
        }
        .starry-tadpole-card-tag {
            font-size: 11px;
            padding: 4px 10px;
            background: rgba(138, 43, 226, 0.1);
            border: 1px solid rgba(138, 43, 226, 0.2);
            border-radius: 8px;
            color: rgba(138, 43, 226, 0.8);
            white-space: nowrap;
        }
        .starry-tadpole-card-enter {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: rgba(138, 43, 226, 0.9);
            transition: all 0.3s ease;
        }
        .starry-tadpole-card-enter .arrow-icon {
            font-size: 16px;
            transition: transform 0.3s ease;
        }
        .starry-tadpole-card:hover .starry-tadpole-card-enter .arrow-icon {
            transform: translateX(4px);
        }
        .starry-tadpole-card:hover .starry-tadpole-card-enter {
            color: rgba(138, 43, 226, 1);
        }

        /* 匿名聊天室入口 - 大卡片 */
        .chatroom-card {
            display: block;
            position: relative;
            border-radius: 20px;
            padding: 28px 32px;
            margin-bottom: 24px;
            text-decoration: none;
            color: var(--text-primary);
            overflow: hidden;
            background: linear-gradient(135deg, rgba(0, 245, 255, 0.08) 0%, rgba(168, 85, 247, 0.08) 50%, rgba(236, 72, 153, 0.05) 100%);
            border: 1px solid rgba(0, 245, 255, 0.2);
            backdrop-filter: blur(16px);
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .chatroom-card::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple), var(--accent-pink));
            opacity: 0.7;
            transition: opacity 0.3s;
        }
        .chatroom-card::after {
            content: '';
            position: absolute;
            top: -50%; left: -50%;
            width: 200%; height: 200%;
            background: radial-gradient(circle at 30% 50%, rgba(0, 245, 255, 0.06) 0%, transparent 50%),
                        radial-gradient(circle at 70% 50%, rgba(168, 85, 247, 0.04) 0%, transparent 50%);
            animation: chatroomGlow 8s ease-in-out infinite alternate;
            pointer-events: none;
        }
        @keyframes chatroomGlow {
            0% { transform: translate(0, 0); }
            100% { transform: translate(5%, 3%); }
        }
        .chatroom-card:hover {
            transform: translateY(-4px) scale(1.01);
            border-color: var(--accent-cyan);
            box-shadow: 0 12px 40px rgba(0, 245, 255, 0.2),
                        0 0 80px rgba(0, 245, 255, 0.06),
                        inset 0 1px 0 rgba(0, 245, 255, 0.1);
        }
        .chatroom-card:hover::before { opacity: 1; }
        .chatroom-card-top {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .chatroom-card-icon {
            width: 52px; height: 52px;
            display: flex; align-items: center; justify-content: center;
            font-size: 28px;
            background: linear-gradient(135deg, rgba(0, 245, 255, 0.15), rgba(168, 85, 247, 0.15));
            border: 1px solid rgba(0, 245, 255, 0.2);
            border-radius: 14px;
            flex-shrink: 0;
        }
        .chatroom-card-title {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0.5px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .chatroom-card-badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 3px 10px;
            font-size: 11px;
            color: var(--accent-green);
            background: rgba(16, 185, 129, 0.1);
            border: 1px solid rgba(16, 185, 129, 0.2);
            border-radius: 20px;
            margin-left: auto;
            white-space: nowrap;
        }
        .chatroom-card-badge .pulse-dot {
            width: 6px; height: 6px;
            background: var(--accent-green);
            border-radius: 50%;
            animation: pulseDot 2s ease-in-out infinite;
        }
        @keyframes pulseDot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(0.7); }
        }
        .chatroom-card-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            position: relative;
            z-index: 1;
        }
        .chatroom-card-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            position: relative;
            z-index: 1;
        }
        .chatroom-card-tags {
            display: flex;
            gap: 8px;
        }
        .chatroom-card-tag {
            font-size: 11px;
            padding: 3px 10px;
            border-radius: 12px;
            background: rgba(0, 245, 255, 0.06);
            border: 1px solid rgba(0, 245, 255, 0.12);
            color: var(--accent-cyan);
            font-family: 'Orbitron', ui-monospace, 'SF Mono', Consolas, Monaco, 'Courier New', monospace;
            letter-spacing: 0.5px;
        }
        .chatroom-card-enter {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: var(--accent-cyan);
            transition: all 0.3s;
        }
        .chatroom-card-enter .arrow-icon {
            transition: transform 0.3s;
            font-size: 16px;
        }
        .chatroom-card:hover .chatroom-card-enter .arrow-icon {
            transform: translateX(4px);
        }
        .chatroom-card:hover .chatroom-card-enter {
            text-shadow: 0 0 12px rgba(0, 245, 255, 0.4);
        }

        .footer {
            text-align: center;
            padding: 20px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer-text { font-size: 12px; color: var(--text-secondary); font-family: 'Orbitron', ui-monospace, 'SF Mono', Consolas, Monaco, 'Courier New', monospace; letter-spacing: 2px; }
        .footer-time { font-size: 11px; color: var(--text-secondary); margin-top: 8px; opacity: 0.6; }
        
        .fixed-menu {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(180deg, transparent, rgba(10,14,23,0.95));
            padding: 15px 20px 20px;
            z-index: 100;
        }
        .menu-container {
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .menu-item {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            background: rgba(0,245,255,0.1);
            border: 1px solid rgba(0,245,255,0.25);
            border-radius: 20px;
            color: var(--accent-cyan);
            font-size: 13px;
            text-decoration: none;
            transition: all 0.3s;
            cursor: pointer;
        }
        .menu-item:hover {
            background: rgba(0,245,255,0.2);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0,245,255,0.2);
        }
        .menu-item.pink { border-color: rgba(236,72,153,0.4); background: rgba(236,72,153,0.1); color: #ec4899; }
        .menu-item.pink:hover { background: rgba(236,72,153,0.2); box-shadow: 0 8px 20px rgba(236,72,153,0.2); }
        .menu-item.purple { border-color: rgba(168,85,247,0.4); background: rgba(168,85,247,0.1); color: #a855f7; }
        .menu-item.purple:hover { background: rgba(168,85,247,0.2); box-shadow: 0 8px 20px rgba(168,85,247,0.2); }
        .menu-item.green { border-color: rgba(16,185,129,0.4); background: rgba(16,185,129,0.1); color: #10b981; }
        .menu-item.green:hover { background: rgba(16,185,129,0.2); box-shadow: 0 8px 20px rgba(16,185,129,0.2); }

        /* 提交链接入口卡片 */
        .submit-card {
            display: block;
            position: relative;
            border-radius: 20px;
            padding: 24px 28px;
            margin-bottom: 24px;
            background: linear-gradient(135deg, rgba(245,158,11,0.08), rgba(168,85,247,0.06));
            border: 1px solid rgba(245,158,11,0.25);
            text-decoration: none;
            color: inherit;
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .submit-card::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 2px;
            background: linear-gradient(90deg, #f59e0b, #a855f7, #f59e0b);
            opacity: 0.6;
            transition: opacity 0.3s;
        }
        .submit-card:hover {
            transform: translateY(-3px);
            border-color: var(--accent-orange);
            box-shadow: 0 10px 30px rgba(245,158,11,0.15);
        }
        .submit-card:hover::before { opacity: 1; }
        .submit-card-top {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 10px;
        }
        .submit-card-icon {
            width: 46px; height: 46px;
            display: flex; align-items: center; justify-content: center;
            font-size: 24px;
            background: linear-gradient(135deg, rgba(245,158,11,0.15), rgba(168,85,247,0.15));
            border-radius: 12px;
        }
        .submit-card-title {
            font-size: 18px;
            font-weight: 700;
            background: linear-gradient(135deg, #f59e0b, #a855f7);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .submit-card-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
        }
        .submit-card-bottom {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 14px;
            padding-top: 12px;
            border-top: 1px solid rgba(255,255,255,0.05);
        }
        .submit-card-tag {
            font-size: 10px;
            padding: 3px 9px;
            border-radius: 10px;
            background: rgba(245,158,11,0.1);
            border: 1px solid rgba(245,158,11,0.2);
            color: #f59e0b;
            font-family: 'Orbitron', ui-monospace, 'SF Mono', Consolas, Monaco, 'Courier New', monospace;
            letter-spacing: 0.5px;
        }
        .submit-card-enter {
            margin-left: auto;
            font-size: 13px;
            color: var(--accent-purple);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .submit-card:hover .submit-card-enter { color: var(--accent-orange); }

        .tech-news-section {
            margin: 24px 20px;
        }
        .section-title {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .section-title::before {
            content: '';
            width: 3px;
            height: 16px;
            background: linear-gradient(180deg, var(--accent-cyan), var(--accent-purple));
            border-radius: 2px;
        }
        .news-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 16px;
            background: var(--bg-card);
            border: 1px solid rgba(255,255,255,0.05);
            border-radius: 12px;
            margin-bottom: 10px;
            text-decoration: none;
            transition: all 0.3s;
        }
        .news-item:hover {
            border-color: var(--accent-purple);
            transform: translateX(4px);
            box-shadow: 0 4px 20px rgba(168,85,247,0.15);
        }
        .news-content { flex: 1; margin-right: 12px; }
        .news-title {
            font-size: 13px;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-meta {
            display: flex;
            gap: 12px;
            font-size: 11px;
            color: var(--text-secondary);
        }
        .news-time { opacity: 0.7; }
        .news-arrow { font-size: 18px; color: var(--accent-purple); opacity: 0.5; }
        .news-item:hover .news-arrow { opacity: 1; }

        .loading {
            text-align: center;
            padding: 40px;
            color: var(--text-secondary);
        }

        .loading::after {
            content: '';
            display: inline-block;
            width: 20px; height: 20px;
            border: 2px solid var(--accent-cyan);
            border-radius: 50%;
            border-top-color: transparent;
            animation: spin 1s linear infinite;
            margin-left: 10px;
            vertical-align: middle;
        }

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

        .fade-in {
            animation: fadeInUp 0.6s ease forwards;
            opacity: 0;
        }

        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }
        .delay-4 { animation-delay: 0.4s; }

    .popup-overlay {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.85);
        backdrop-filter: blur(10px);
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 10000;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    .popup-overlay.show { opacity: 1; visibility: visible; }
    .popup-card {
        background: linear-gradient(145deg, #1a1f2e, #111827);
        border: 1px solid var(--accent-cyan);
        border-radius: 20px;
        padding: 36px 32px;
        max-width: 340px;
        width: 88%;
        text-align: center;
        transform: scale(0.9);
        transition: transform 0.3s ease;
        box-shadow: 0 0 60px rgba(0, 245, 255, 0.25);
        position: relative;
    }
    .popup-overlay.show .popup-card { transform: scale(1); }
    .popup-icon { font-size: 52px; margin-bottom: 16px; display: block; }
    .popup-title {
        font-family: 'Orbitron', ui-monospace, 'SF Mono', Consolas, Monaco, 'Courier New', monospace;
        font-size: 17px;
        font-weight: 700;
        background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        margin-bottom: 14px;
    }
    .popup-content { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 26px; }
    .popup-btn {
        background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
        color: #000;
        border: none;
        padding: 14px 36px;
        border-radius: 25px;
        font-size: 14px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.3s ease;
    }
    .popup-btn:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(0, 245, 255, 0.5); }
    .popup-close {
        position: absolute;
        top: 14px;
        right: 16px;
        background: none;
        border: none;
        color: var(--text-secondary);
        font-size: 22px;
        cursor: pointer;
        opacity: 0.5;
    }
    .popup-close:hover { opacity: 1; }
    .popup-footer { margin-top: 16px; font-size: 12px; color: var(--text-secondary); opacity: 0.5; }

    /* 公告跑马灯样式 */
    .announcement-bar {
        margin: 16px 0 20px;
        background: linear-gradient(135deg, rgba(0, 245, 255, 0.08), rgba(168, 85, 247, 0.08));
        border: 1px solid var(--border-glow);
        border-radius: 12px;
        overflow: hidden;
        position: relative;
        display: none;
    }
    .announcement-bar.show { display: block; }
    .announcement-bar .label {
        position: absolute;
        left: 0;
        top: 0;
        bottom: 0;
        padding: 0 14px;
        background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
        color: #fff;
        font-size: 12px;
        font-weight: 600;
        display: flex;
        align-items: center;
        z-index: 2;
        letter-spacing: 1px;
    }
    .announcement-bar .marquee-container {
        padding: 12px 14px;
        margin-left: 70px;
        overflow: hidden;
        white-space: nowrap;
    }
    .announcement-bar .marquee-content {
        display: inline-flex;
        gap: 60px;
        animation: marquee 25s linear infinite;
    }
    .announcement-bar .marquee-item {
        color: var(--text-primary);
        font-size: 14px;
        white-space: nowrap;
    }
    .announcement-bar .marquee-item a {
        color: var(--accent-cyan);
        text-decoration: none;
        margin-left: 4px;
        transition: color 0.2s;
    }
    .announcement-bar .marquee-item a:hover {
        color: var(--accent-purple);
        text-decoration: underline;
    }
    .announcement-bar .marquee-separator {
        color: var(--accent-cyan);
        opacity: 0.5;
        margin: 0 8px;
    }
    @keyframes marquee {
        0% { transform: translateX(0); }
        100% { transform: translateX(-50%); }
    }
    [data-theme="light"] .announcement-bar {
        background: linear-gradient(135deg, rgba(8, 145, 178, 0.08), rgba(147, 51, 234, 0.08));
    }

    /* ===== 响应式设计 ===== */
    
    /* 平板竖屏及以上 (480px+) */
    @media (min-width: 480px) {
        .chatroom-card { padding: 24px 26px; }
        .chatroom-card-title { font-size: 18px; }
        .links-compact-grid { grid-template-columns: repeat(auto-fill, minmax(85px, 1fr)); gap: 8px; }
        .container {
            max-width: 100%;
            padding: 30px 24px 100px;
        }
        .header {
            padding: 50px 0 35px;
        }
        .header-title {
            font-size: 32px;
        }
        .search-box {
            max-width: 400px;
            margin: 0 auto 20px;
        }
        .section-title {
            font-size: 20px;
        }
        .info-card {
            padding: 24px 20px;
        }
        .info-card-icon {
            font-size: 32px;
        }
        .link-card {
            padding: 18px;
        }
        .link-icon {
            font-size: 26px;
        }
        .link-title {
            font-size: 16px;
        }
    }
    
    /* 平板横屏/小笔记本 (768px+) */
    @media (min-width: 768px) {
        .chatroom-card { padding: 28px 32px; }
        .chatroom-card-title { font-size: 20px; }
        .cat-card-grid { grid-template-columns: repeat(auto-fill, minmax(155px, 1fr)); }
        .cat-carousel-item { flex: 0 0 190px; }
        .cat-compact-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); }
        .links-compact-grid { grid-template-columns: repeat(auto-fill, minmax(95px, 1fr)); gap: 10px; }
        .container {
            max-width: 720px;
            padding: 40px 32px 120px;
        }
        .header {
            padding: 60px 0 40px;
        }
        .header-title {
            font-size: 36px;
        }
        .search-box {
            max-width: 480px;
        }
        .search-input {
            font-size: 16px;
            padding: 16px 20px;
        }
        .info-grid {
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .info-card {
            padding: 28px 20px;
        }
        .links-grid {
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 16px;
        }
        .section-title {
            font-size: 22px;
        }
        .menu-bar {
            max-width: 600px;
            left: 50%;
            transform: translateX(-50%);
        }
        .menu-item {
            padding: 10px 20px;
        }
        .tech-news-card {
            padding: 20px;
        }
    }
    
    /* 桌面端 (1024px+) */
    @media (min-width: 1024px) {
        .cat-card-grid { grid-template-columns: repeat(auto-fill, minmax(175px, 1fr)); gap: 18px; }
        .cat-badge-wrap { gap: 16px; }
        .cat-timeline-item { padding: 20px 26px; }
        .cat-carousel-item { flex: 0 0 210px; }
        .cat-compact-grid { grid-template-columns: repeat(auto-fill, minmax(115px, 1fr)); gap: 10px; }
        .links-compact-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 10px; }
        .container {
            max-width: 900px;
            padding: 50px 40px 140px;
        }
        .header {
            padding: 70px 0 50px;
        }
        .header-title {
            font-size: 42px;
        }
        .search-box {
            max-width: 560px;
        }
        .info-grid {
            gap: 20px;
        }
        .info-card {
            padding: 32px 24px;
            border-radius: 20px;
        }
        .info-card:hover {
            transform: translateY(-6px);
        }
        .links-grid {
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 20px;
        }
        .link-card {
            padding: 22px;
            border-radius: 18px;
        }
        .link-card:hover {
            transform: translateY(-4px);
        }
        .tech-news-grid {
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        }
        .menu-bar {
            max-width: 700px;
        }
    }
    
    /* 大桌面 (1440px+) */
    @media (min-width: 1440px) {
        .cat-card-grid { grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); }
        .cat-carousel-item { flex: 0 0 220px; }
        .cat-compact-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 12px; }
        .links-compact-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 12px; }
        .container {
            max-width: 1100px;
        }
        .header-title {
            font-size: 48px;
        }
        .links-grid {
            grid-template-columns: repeat(4, 1fr);
        }
    }