:root {
            --primary-color: #1a365d;
            --secondary-color: #e63946;
            --accent-color: #2a9d8f;
            --light-color: #f8f9fa;
            --dark-color: #212529;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.6;
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .navbar-nav .nav-link {
            font-weight: 500;
            transition: color 0.3s;
        }
        .navbar-nav .nav-link:hover {
            color: var(--secondary-color);
        }
        .hero-section {
            background: linear-gradient(rgba(26, 54, 93, 0.9), rgba(26, 54, 93, 0.8)), 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: 120px 0;
            min-height: 90vh;
            display: flex;
            align-items: center;
        }
        .hero-title {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
        }
        .hero-subtitle {
            font-size: 1.3rem;
            max-width: 700px;
        }
        .section-padding {
            padding: 80px 0;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
            text-align: center;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
        }
        .service-card, .case-card, .team-card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
            background: white;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .service-card:hover, .case-card:hover, .team-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .service-icon {
            font-size: 3rem;
            color: var(--accent-color);
            margin-bottom: 20px;
        }
        .case-img {
            height: 250px;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .case-card:hover .case-img {
            transform: scale(1.05);
        }
        .team-img {
            height: 280px;
            object-fit: cover;
        }
        .news-item {
            border-left: 4px solid var(--accent-color);
            padding-left: 20px;
            margin-bottom: 25px;
        }
        .news-date {
            color: var(--secondary-color);
            font-weight: 600;
        }
        .contact-info li {
            margin-bottom: 15px;
            font-size: 1.1rem;
        }
        .contact-icon {
            color: var(--accent-color);
            margin-right: 10px;
            width: 25px;
        }
        .friendlink {
            background: var(--light-color);
            padding: 60px 0;
        }
        .flink {
            display: inline-block;
            padding: 10px 20px;
            margin: 10px;
            background: white;
            border-radius: 8px;
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s;
            border: 2px solid transparent;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
        }
        .flink:hover {
            border-color: var(--secondary-color);
            color: var(--secondary-color);
            transform: translateY(-3px);
        }
        footer {
            background: var(--primary-color);
            color: white;
        }
        .footer-link {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-link:hover {
            color: white;
        }
        .btn-primary {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            padding: 12px 30px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: #c1121f;
            border-color: #c1121f;
            transform: translateY(-3px);
        }
        .btn-outline-light:hover {
            color: var(--primary-color);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero-subtitle {
                font-size: 1.1rem;
            }
            .section-padding {
                padding: 60px 0;
            }
        }
        .content-rich {
            text-align: justify;
            font-size: 1.05rem;
        }
        .content-rich p {
            margin-bottom: 1.2rem;
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--secondary-color);
        }
        .stats-label {
            font-size: 1.1rem;
            color: var(--dark-color);
        }
        .client-logo {
            filter: grayscale(100%);
            opacity: 0.7;
            transition: all 0.3s;
            max-height: 60px;
        }
        .client-logo:hover {
            filter: grayscale(0);
            opacity: 1;
        }
        .sticky-top {
            top: 0;
            z-index: 1020;
        }