:root {
            --primary-color: #1a56db;
            --secondary-color: #0e9f6e;
            --dark-color: #1f2937;
            --light-color: #f9fafb;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
        }
        body {
            font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
            color: #333;
            line-height: 1.8;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .nav-link {
            font-weight: 500;
            transition: color 0.3s;
        }
        .nav-link:hover {
            color: var(--secondary-color) !important;
        }
        .hero-section {
            background: linear-gradient(135deg, #1a56db 0%, #0e9f6e 100%);
            color: white;
            padding: 120px 0;
            position: relative;
            overflow: hidden;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
        }
        .section-title {
            color: var(--dark-color);
            font-weight: 700;
            margin-bottom: 2.5rem;
            position: relative;
            padding-bottom: 15px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 4px;
            background: var(--secondary-color);
            border-radius: 2px;
        }
        .card {
            border: none;
            border-radius: 12px;
            box-shadow: var(--shadow);
            transition: transform 0.3s, box-shadow 0.3s;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
        }
        .btn-primary {
            background-color: var(--primary-color);
            border: none;
            padding: 12px 28px;
            border-radius: 8px;
            font-weight: 600;
            transition: background-color 0.3s, transform 0.2s;
        }
        .btn-primary:hover {
            background-color: #1546b4;
            transform: scale(1.05);
        }
        .btn-secondary {
            background-color: var(--secondary-color);
            border: none;
            padding: 12px 28px;
            border-radius: 8px;
            font-weight: 600;
            transition: background-color 0.3s;
        }
        .btn-secondary:hover {
            background-color: #0c7e55;
        }
        .icon-box {
            width: 70px;
            height: 70px;
            background: rgba(26, 86, 219, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: var(--primary-color);
            font-size: 1.8rem;
        }
        .flink {
            display: inline-block;
            padding: 10px 20px;
            margin: 8px;
            background: #f1f5f9;
            border-radius: 8px;
            color: var(--dark-color);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s;
            border: 1px solid #e2e8f0;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .friendlink {
            background: #f8fafc;
            padding: 60px 0;
            border-top: 1px solid #e2e8f0;
            border-bottom: 1px solid #e2e8f0;
        }
        footer {
            background: var(--dark-color);
            color: #d1d5db;
        }
        footer a {
            color: #d1d5db;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: white;
        }
        .contact-info li {
            margin-bottom: 10px;
        }
        .contact-info i {
            width: 24px;
            color: var(--secondary-color);
        }
        .img-hover-zoom {
            overflow: hidden;
            border-radius: 12px;
        }
        .img-hover-zoom img {
            transition: transform 0.5s;
        }
        .img-hover-zoom:hover img {
            transform: scale(1.05);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }