:root {
            --primary-color: #1a365d;
            --secondary-color: #e63946;
            --accent-color: #2a9d8f;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --gray-color: #6c757d;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .hero-section {
            background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(26, 54, 93, 0.9)), url('https://images.unsplash.com/photo-1600320254374-1d8c9f4e1c4b?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 180px 0 120px;
            position: relative;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            padding-bottom: 1rem;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
        }
        .section-title.center::after {
            left: 50%;
            transform: translateX(-50%);
        }
        .icon-box {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: var(--primary-color);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            margin-bottom: 1.5rem;
            transition: all 0.3s ease;
        }
        .service-card, .advantage-card, .case-card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .service-card:hover, .advantage-card:hover, .case-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .service-card .icon-box {
            background: var(--accent-color);
        }
        .advantage-card .icon-box {
            background: var(--secondary-color);
        }
        .stats-box {
            background: var(--primary-color);
            color: white;
            padding: 40px 20px;
            border-radius: 10px;
            text-align: center;
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 800;
            margin-bottom: 0.5rem;
            color: var(--secondary-color);
        }
        .contact-info-box {
            background: var(--light-color);
            border-left: 4px solid var(--accent-color);
            padding: 25px;
            border-radius: 0 8px 8px 0;
            margin-bottom: 1.5rem;
        }
        .contact-info-box i {
            color: var(--accent-color);
            font-size: 1.5rem;
            margin-right: 15px;
        }
        footer {
            background: var(--dark-color);
            color: #ccc;
            padding-top: 60px;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
            display: block;
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .friendlink {
            background: rgba(255,255,255,0.05);
            border-radius: 8px;
            padding: 30px;
        }
        .flink {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            color: #ccc;
            padding: 8px 20px;
            border-radius: 30px;
            margin: 5px 8px;
            text-decoration: none;
            transition: all 0.3s;
            border: 1px solid transparent;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            border-color: var(--secondary-color);
            transform: translateY(-3px);
        }
        .btn-primary-custom {
            background: var(--primary-color);
            border-color: var(--primary-color);
            padding: 12px 30px;
            font-weight: 600;
            border-radius: 30px;
            transition: all 0.3s;
        }
        .btn-primary-custom:hover {
            background: var(--secondary-color);
            border-color: var(--secondary-color);
            transform: translateY(-3px);
        }
        .btn-secondary-custom {
            background: var(--secondary-color);
            border-color: var(--secondary-color);
            color: white;
            padding: 12px 30px;
            font-weight: 600;
            border-radius: 30px;
            transition: all 0.3s;
        }
        .btn-secondary-custom:hover {
            background: var(--accent-color);
            border-color: var(--accent-color);
            transform: translateY(-3px);
        }
        .form-control-custom {
            border-radius: 8px;
            border: 1px solid #ddd;
            padding: 15px;
            transition: all 0.3s;
        }
        .form-control-custom:focus {
            border-color: var(--accent-color);
            box-shadow: 0 0 0 0.25rem rgba(42, 157, 143, 0.25);
        }
        .carousel-indicators button {
            width: 12px !important;
            height: 12px !important;
            border-radius: 50% !important;
        }
        .navbar-nav .nav-link {
            font-weight: 600;
            padding: 8px 15px !important;
            margin: 0 3px;
            border-radius: 5px;
            transition: all 0.3s;
        }
        .navbar-nav .nav-link:hover, .navbar-nav .nav-link.active {
            background: rgba(230, 57, 70, 0.1);
            color: var(--secondary-color) !important;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 120px 0 80px;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }