:root {
            --primary: #0d6efd;
            --secondary: #6c757d;
            --success: #198754;
            --dark: #212529;
            --light: #f8f9fa;
            --warning: #ffc107;
            --danger: #dc3545;
            --shadow: 0 .5rem 1rem rgba(0,0,0,.15);
        }
        body {
            font-family: "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary) !important;
        }
        .navbar-nav .nav-link {
            font-weight: 500;
            padding: 0.5rem 1.2rem !important;
            transition: all 0.3s;
            border-radius: 0.25rem;
        }
        .navbar-nav .nav-link:hover, .navbar-nav .nav-link.active {
            background-color: rgba(13, 110, 253, 0.1);
            color: var(--primary) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1486262715619-67b85e0b08d3?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') no-repeat center center/cover;
            color: white;
            padding: 8rem 0;
            text-align: center;
        }
        .section-title {
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 3rem;
            font-weight: 700;
            text-align: center;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
        }
        .feature-icon {
            width: 70px;
            height: 70px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            margin: 0 auto 1.5rem;
            transition: all 0.3s;
        }
        .feature-card {
            border: none;
            border-radius: 1rem;
            box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.05);
            transition: transform 0.3s, box-shadow 0.3s;
            height: 100%;
            padding: 2rem 1.5rem;
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow);
        }
        .feature-card:hover .feature-icon {
            background: var(--dark);
            transform: rotateY(180deg);
        }
        .btn-primary {
            padding: 0.75rem 2rem;
            border-radius: 2rem;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: #0b5ed7;
            transform: scale(1.05);
        }
        .stats-section {
            background-color: #f8f9fa;
            padding: 5rem 0;
        }
        .stat-number {
            font-size: 3.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
        }
        .stat-label {
            font-size: 1.1rem;
            color: var(--secondary);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-top: 0.5rem;
        }
        .service-img {
            border-radius: 1rem;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: transform 0.5s;
        }
        .service-img:hover {
            transform: scale(1.03);
        }
        .flink {
            display: inline-block;
            padding: 0.5rem 1.5rem;
            margin: 0.5rem;
            background: #f1f5f9;
            border-radius: 2rem;
            color: #475569;
            text-decoration: none;
            transition: all 0.3s;
            border: 1px solid #e2e8f0;
            font-weight: 500;
        }
        .flink:hover {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
            transform: translateY(-3px);
        }
        .friendlink {
            background: #f8fafc;
            padding: 4rem 0;
            border-top: 1px solid #e2e8f0;
            border-bottom: 1px solid #e2e8f0;
        }
        footer {
            background: var(--dark);
            color: white;
            padding-top: 4rem;
        }
        footer a {
            color: #adb5bd;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: white;
        }
        .footer-bottom {
            border-top: 1px solid #495057;
            padding: 1.5rem 0;
            margin-top: 3rem;
            font-size: 0.9rem;
            color: #adb5bd;
        }
        .contact-info li {
            margin-bottom: 1rem;
            padding-left: 1.5rem;
            position: relative;
        }
        .contact-info li i {
            position: absolute;
            left: 0;
            top: 0.3rem;
            color: var(--primary);
        }
        .mobile-adjust {
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 5rem 0;
            }
            .hero-section h1 {
                font-size: 2.2rem;
            }
            .stat-number {
                font-size: 2.5rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }
        .article-content {
            font-size: 1.1rem;
            color: #555;
        }
        .article-content h3 {
            color: var(--dark);
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            font-weight: 600;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .article-content ul {
            margin-bottom: 1.5rem;
            padding-left: 2rem;
        }
        .article-content li {
            margin-bottom: 0.5rem;
        }