:root {
            --primary-color: #d32f2f;
            --secondary-color: #f5f5f5;
            --accent-color: #ff9800;
            --text-dark: #333;
            --text-light: #666;
            --transition: all 0.3s ease;
        }
        body {
            font-family: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text-dark);
            background: linear-gradient(135deg, #fdfcfb 0%, #e2d1c3 100%);
            line-height: 1.6;
        }
        .navbar-brand {
            font-weight: bold;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-nav .nav-link {
            font-weight: 500;
            color: var(--text-dark) !important;
            transition: var(--transition);
            padding: 0.5rem 1rem;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--primary-color) !important;
            background-color: rgba(211, 47, 47, 0.1);
            border-radius: 5px;
        }
        .hero-banner {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1519681393784-d120267933ba?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 100px 0;
            text-align: center;
        }
        .hero-banner h1 {
            font-size: 3.5rem;
            font-weight: bold;
            margin-bottom: 20px;
            text-shadow: 2px 2px 5px rgba(0,0,0,0.5);
        }
        .section-title {
            position: relative;
            font-size: 2.2rem;
            color: var(--primary-color);
            margin-bottom: 40px;
            text-align: center;
            padding-bottom: 15px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background-color: var(--accent-color);
        }
        .card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            transition: var(--transition);
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.2);
        }
        .card-img-top {
            height: 250px;
            object-fit: cover;
            transition: var(--transition);
        }
        .card:hover .card-img-top {
            transform: scale(1.05);
        }
        .card-title {
            color: var(--primary-color);
            font-weight: bold;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border: none;
            padding: 10px 25px;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #b71c1c;
            transform: scale(1.05);
        }
        .video-thumbnail {
            position: relative;
            overflow: hidden;
            border-radius: 10px;
        }
        .video-thumbnail img {
            width: 100%;
            height: auto;
            display: block;
        }
        .play-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: var(--transition);
        }
        .video-thumbnail:hover .play-overlay {
            opacity: 1;
        }
        .play-icon {
            color: white;
            font-size: 3rem;
        }
        .friendlink {
            background-color: var(--secondary-color);
            padding: 40px 0;
            border-radius: 15px;
        }
        .flink {
            display: inline-block;
            margin: 10px 15px;
            padding: 10px 20px;
            background-color: white;
            color: var(--text-dark);
            border-radius: 30px;
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            box-shadow: 0 5px 10px rgba(0,0,0,0.05);
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        footer {
            background-color: #2c3e50;
            color: white;
            padding: 40px 0 20px;
        }
        footer a {
            color: #ecf0f1;
            text-decoration: none;
            transition: var(--transition);
        }
        footer a:hover {
            color: var(--accent-color);
        }
        .social-icons a {
            display: inline-block;
            margin: 0 10px;
            font-size: 1.5rem;
            color: white;
            transition: var(--transition);
        }
        .social-icons a:hover {
            color: var(--accent-color);
            transform: scale(1.2);
        }
        .seo-content {
            background-color: white;
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin: 30px 0;
            font-size: 1.1rem;
            line-height: 1.8;
            color: var(--text-light);
        }
        .seo-content h2, .seo-content h3 {
            color: var(--primary-color);
            margin-top: 25px;
        }
        @media (max-width: 768px) {
            .hero-banner h1 {
                font-size: 2.5rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .navbar-nav .nav-link {
                padding: 0.5rem;
            }
        }