:root {
            --primary-color: #a855f7;
            --secondary-color: #f472b6;
            --dark-color: #1f2937;
            --light-color: #f9fafb;
        }
        body {
            font-family: "Microsoft YaHei", "Segoe UI", sans-serif;
            background-color: #0f172a;
            color: #e2e8f0;
            line-height: 1.8;
        }
        .navbar {
            background: rgba(15, 23, 42, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid #334155;
        }
        .nav-link {
            color: #cbd5e1 !important;
            font-weight: 500;
            transition: all 0.3s;
            margin: 0 10px;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            padding: 100px 0;
            position: relative;
            overflow: hidden;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            background: linear-gradient(to right, #f472b6, #a855f7);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        @media (max-width: 768px) {
            .hero-title { font-size: 2.5rem; }
        }
        .card {
            background: #1e293b;
            border: 1px solid #334155;
            border-radius: 15px;
            transition: transform 0.3s, box-shadow 0.3s;
            overflow: hidden;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(168, 85, 247, 0.3);
        }
        .card-img-top {
            height: 250px;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .card:hover .card-img-top {
            transform: scale(1.05);
        }
        .btn-primary {
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            border: none;
            border-radius: 50px;
            padding: 10px 25px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            transform: scale(1.05);
            box-shadow: 0 5px 15px rgba(168, 85, 247, 0.4);
        }
        .section-title {
            position: relative;
            display: inline-block;
            margin-bottom: 50px;
            font-size: 2.2rem;
            font-weight: 700;
        }
        .section-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -10px;
            width: 70px;
            height: 4px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            border-radius: 2px;
        }
        footer {
            background: #0d1524;
            border-top: 1px solid #334155;
        }
        .friendlink .flink {
            display: inline-block;
            margin: 5px 15px;
            padding: 8px 20px;
            background: #1e293b;
            border-radius: 30px;
            color: #cbd5e1;
            text-decoration: none;
            transition: all 0.3s;
            border: 1px solid #334155;
        }
        .friendlink .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        .video-container {
            position: relative;
            padding-bottom: 56.25%;
            height: 0;
            overflow: hidden;
            border-radius: 15px;
            margin: 20px 0;
        }
        .video-container iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
        }
        .badge-keyword {
            background: #334155;
            color: #cbd5e1;
            margin: 3px;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
        }
        .badge-keyword:hover {
            background: var(--primary-color);
            cursor: pointer;
        }
        .content-text {
            font-size: 1.1rem;
            color: #94a3b8;
        }
        .sticky-top { top: 20px; }
        .list-group-item {
            background: #1e293b;
            color: #cbd5e1;
            border: 1px solid #334155;
        }
        .list-group-item.active {
            background: var(--primary-color);
            border-color: var(--primary-color);
        }