:root {
            --primary: #1a4f8c;
            --secondary: #e6a23c;
            --light: #f8f9fa;
            --dark: #343a40;
            --success: #28a745;
            --shadow: 0 .5rem 1rem rgba(0,0,0,.15);
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: #333;
            line-height: 1.8;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: var(--shadow);
            padding-top: 1rem;
            padding-bottom: 1rem;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary) !important;
        }
        .navbar-brand span {
            color: var(--secondary);
        }
        .nav-link {
            font-weight: 600;
            color: var(--dark) !important;
            margin: 0 0.5rem;
            transition: color 0.3s;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary) !important;
        }
        .hero {
            background: linear-gradient(rgba(26, 79, 140, 0.85), rgba(26, 79, 140, 0.9)), url('https://images.unsplash.com/photo-1497366216548-37526070297c?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 8rem 0;
            position: relative;
        }
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 5px rgba(0,0,0,0.3);
        }
        .hero p {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        .section-padding {
            padding-top: 6rem;
            padding-bottom: 6rem;
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            text-align: center;
        }
        .section-title h2 {
            font-size: 2.5rem;
            color: var(--primary);
            display: inline-block;
            padding-bottom: 0.5rem;
        }
        .section-title h2:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--secondary);
            border-radius: 2px;
        }
        .card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            transition: transform 0.4s, box-shadow 0.4s;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 1rem 3rem rgba(0,0,0,.175) !important;
        }
        .card-img-top {
            height: 220px;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .card:hover .card-img-top {
            transform: scale(1.05);
        }
        .service-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary), #2c6cb0);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: -40px auto 20px;
            font-size: 2rem;
            box-shadow: var(--shadow);
        }
        .bg-light-alt {
            background-color: #f1f7fd;
        }
        .timeline {
            position: relative;
            padding-left: 30px;
        }
        .timeline:before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--primary);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 2.5rem;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: -36px;
            top: 5px;
            width: 15px;
            height: 15px;
            border-radius: 50%;
            background: var(--secondary);
            border: 3px solid var(--primary);
        }
        .contact-info-box {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
            text-align: center;
            height: 100%;
            transition: transform 0.3s;
        }
        .contact-info-box:hover {
            transform: translateY(-5px);
        }
        .contact-info-box i {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }
        .form-control, .form-select {
            padding: 0.75rem 1rem;
            border: 1px solid #ced4da;
            border-radius: 8px;
            transition: all 0.3s;
        }
        .form-control:focus, .form-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 0.25rem rgba(26, 79, 140, 0.25);
        }
        .btn-primary {
            background-color: var(--primary);
            border-color: var(--primary);
            padding: 0.75rem 2rem;
            font-weight: 600;
            border-radius: 8px;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: #153d6f;
            border-color: #153d6f;
            transform: translateY(-2px);
        }
        .friendlink .flink {
            display: inline-block;
            background: white;
            padding: 0.75rem 1.5rem;
            margin: 0.5rem;
            border-radius: 50px;
            color: var(--dark);
            text-decoration: none;
            font-weight: 500;
            box-shadow: 0 3px 10px rgba(0,0,0,0.08);
            transition: all 0.3s;
        }
        .friendlink .flink:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-3px);
        }
        footer {
            background-color: var(--dark);
            color: #adb5bd;
            padding-top: 4rem;
            padding-bottom: 2rem;
        }
        footer a {
            color: #adb5bd;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: white;
        }
        .social-icons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
            margin-right: 0.75rem;
            transition: all 0.3s;
        }
        .social-icons a:hover {
            background: var(--primary);
            transform: translateY(-3px);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            text-decoration: none;
            box-shadow: var(--shadow);
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            .section-padding {
                padding-top: 4rem;
                padding-bottom: 4rem;
            }
            .section-title h2 {
                font-size: 2rem;
            }
        }