:root {
            --primary-color: #1a5f7a;
            --secondary-color: #2a9d8f;
            --accent-color: #e76f51;
            --light-color: #f8f9fa;
            --dark-color: #264653;
            --text-color: #333333;
            --shadow: 0 5px 15px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            color: var(--text-color);
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--dark-color);
            margin-bottom: 1rem;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
        }
        section {
            padding: 80px 0;
        }
        .section-title {
            position: relative;
            margin-bottom: 60px;
            text-align: center;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            border-radius: 2px;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .btn-accent {
            background-color: var(--accent-color);
            border-color: var(--accent-color);
            color: white;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-accent:hover {
            background-color: #d45c3e;
            border-color: #d45c3e;
            color: white;
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            padding: 15px 0;
            transition: var(--transition);
        }
        .navbar.scrolled {
            padding: 10px 0;
            background-color: rgba(255, 255, 255, 0.98);
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 500;
            margin: 0 8px;
            color: var(--dark-color);
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color);
        }
        .hero {
            background: linear-gradient(rgba(26, 95, 122, 0.85), rgba(42, 157, 143, 0.8)), url('https://images.unsplash.com/photo-1519494026892-80bbd2d6fd0d?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1600&q=80');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            color: white;
            padding: 160px 0 100px;
            text-align: center;
        }
        .hero h1 {
            color: white;
            font-size: 3.2rem;
            margin-bottom: 20px;
        }
        .hero p {
            font-size: 1.2rem;
            margin-bottom: 30px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        .service-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .service-icon {
            width: 70px;
            height: 70px;
            background: var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: white;
            font-size: 1.8rem;
        }
        .feature-box {
            padding: 30px;
            text-align: center;
            border-radius: 10px;
            background: white;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
        }
        .feature-box:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.12);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }
        .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 #f0f0f0;
        }
        .testimonial-card {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: var(--shadow);
            position: relative;
            margin-bottom: 30px;
            height: 100%;
        }
        .testimonial-card::before {
            content: "\201C";
            font-size: 4rem;
            color: var(--secondary-color);
            position: absolute;
            top: 10px;
            left: 20px;
            opacity: 0.3;
        }
        .contact-info-box {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: var(--shadow);
            text-align: center;
            margin-bottom: 30px;
            height: 100%;
        }
        .contact-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 70px 0 20px;
        }
        footer a {
            color: rgba(255,255,255,0.8);
        }
        footer a:hover {
            color: white;
        }
        .friendlink {
            background: rgba(255,255,255,0.05);
            padding: 20px;
            border-radius: 8px;
            margin-top: 30px;
        }
        .flink {
            display: inline-block;
            margin: 5px 10px;
            padding: 5px 15px;
            background: rgba(255,255,255,0.1);
            border-radius: 20px;
            transition: var(--transition);
        }
        .flink:hover {
            background: rgba(255,255,255,0.2);
            transform: translateY(-3px);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            margin-top: 50px;
            text-align: center;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--secondary-color);
            color: white;
        }
        @media (max-width: 992px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            section {
                padding: 60px 0;
            }
        }
        @media (max-width: 768px) {
            .hero {
                padding: 130px 0 80px;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .section-title {
                margin-bottom: 40px;
            }
        }