:root {
            --primary-color: #1a365d;
            --secondary-color: #e63946;
            --accent-color: #ffb703;
            --light-bg: #f8f9fa;
            --dark-text: #212529;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            color: var(--dark-text);
            line-height: 1.8;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--primary-color);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 500;
            margin: 0 8px;
            transition: var(--transition);
        }
        .nav-link:hover, .nav-link.active {
            color: var(--secondary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(26, 54, 93, 0.9)), url('https://images.unsplash.com/photo-1552664730-d307ca884978?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            color: white;
            padding: 180px 0 120px;
            position: relative;
        }
        .hero-section h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 10px rgba(0,0,0,0.3);
        }
        .btn-primary {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            padding: 12px 30px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #c1121f;
            border-color: #c1121f;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
        }
        .section-padding {
            padding: 100px 0;
        }
        .section-title {
            position: relative;
            margin-bottom: 60px;
            text-align: center;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
        }
        .service-card {
            background: white;
            border-radius: 15px;
            padding: 30px;
            height: 100%;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            transition: var(--transition);
            border-top: 5px solid transparent;
        }
        .service-card:hover {
            transform: translateY(-15px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            border-top-color: var(--secondary-color);
        }
        .service-icon {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }
        .case-study-item {
            position: relative;
            border-radius: 10px;
            overflow: hidden;
            margin-bottom: 30px;
        }
        .case-study-item img {
            transition: var(--transition);
            width: 100%;
            height: 300px;
            object-fit: cover;
        }
        .case-study-item:hover img {
            transform: scale(1.05);
        }
        .case-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(transparent, rgba(26, 54, 93, 0.9));
            color: white;
            padding: 30px;
            transform: translateY(10px);
            opacity: 0;
            transition: var(--transition);
        }
        .case-study-item:hover .case-overlay {
            opacity: 1;
            transform: translateY(0);
        }
        .team-member {
            text-align: center;
            margin-bottom: 30px;
        }
        .team-img {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            object-fit: cover;
            margin: 0 auto 20px;
            border: 5px solid var(--light-bg);
            transition: var(--transition);
        }
        .team-member:hover .team-img {
            border-color: var(--secondary-color);
        }
        .social-links a {
            display: inline-block;
            width: 36px;
            height: 36px;
            background: var(--light-bg);
            border-radius: 50%;
            line-height: 36px;
            margin: 0 3px;
            transition: var(--transition);
        }
        .social-links a:hover {
            background: var(--secondary-color);
            color: white;
        }
        .contact-info-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 30px;
        }
        .contact-icon {
            width: 60px;
            height: 60px;
            background: var(--light-bg);
            border-radius: 50%;
            line-height: 60px;
            text-align: center;
            font-size: 1.5rem;
            color: var(--secondary-color);
            margin-right: 20px;
            flex-shrink: 0;
        }
        .footer {
            background: var(--primary-color);
            color: rgba(255,255,255,0.8);
            padding: 80px 0 30px;
        }
        .footer a {
            color: rgba(255,255,255,0.8);
            text-decoration: none;
            transition: var(--transition);
        }
        .footer a:hover {
            color: white;
            padding-left: 5px;
        }
        .flink {
            background: rgba(255,255,255,0.1);
            padding: 12px 20px;
            border-radius: 8px;
            display: inline-block;
            margin: 5px 8px;
            transition: var(--transition);
            color: rgba(255,255,255,0.9);
            border: 1px solid rgba(255,255,255,0.15);
        }
        .flink:hover {
            background: rgba(255,255,255,0.2);
            color: white;
            transform: translateY(-3px);
            border-color: var(--secondary-color);
            text-decoration: none;
        }
        .friendlink {
            background: rgba(255,255,255,0.05);
            padding: 40px;
            border-radius: 15px;
            margin-top: 40px;
        }
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--secondary-color);
            color: white;
            border-radius: 50%;
            line-height: 50px;
            text-align: center;
            font-size: 1.2rem;
            cursor: pointer;
            z-index: 999;
            opacity: 0;
            transition: var(--transition);
        }
        .scroll-top.active {
            opacity: 1;
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .section-padding {
                padding: 60px 0;
            }
            .contact-info-item {
                flex-direction: column;
                text-align: center;
            }
            .contact-icon {
                margin-right: 0;
                margin-bottom: 15px;
            }
        }