:root {
            --primary-color: #0a58ca;
            --secondary-color: #6c757d;
            --accent-color: #198754;
            --light-bg: #f8f9fa;
            --dark-bg: #212529;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.8;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--dark-bg);
        }
        .section-padding {
            padding-top: 5rem;
            padding-bottom: 5rem;
        }
        .section-title {
            text-align: center;
            margin-bottom: 3.5rem;
            position: relative;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: var(--primary-color);
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            padding: 1rem 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-nav .nav-link {
            font-weight: 600;
            color: #495057 !important;
            margin: 0 0.5rem;
            padding: 0.5rem 1rem !important;
            border-radius: 4px;
            transition: var(--transition);
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--primary-color) !important;
            background-color: rgba(10, 88, 202, 0.05);
        }
        .hero {
            background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
            color: white;
            padding: 10rem 0 8rem;
            position: relative;
            overflow: hidden;
        }
        .hero h1 {
            font-size: 3.5rem;
            color: white;
            margin-bottom: 1.5rem;
        }
        .hero p {
            font-size: 1.25rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }
        .hero .btn {
            padding: 0.8rem 2.5rem;
            font-size: 1.1rem;
            border-radius: 50px;
            transition: var(--transition);
        }
        .hero .btn-primary {
            background-color: #20c997;
            border-color: #20c997;
        }
        .hero .btn-primary:hover {
            background-color: #1ba87e;
            border-color: #1ba87e;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
        }
        .service-card, .case-card, .team-card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: var(--transition);
            height: 100%;
        }
        .service-card:hover, .case-card:hover, .team-card:hover {
            transform: translateY(-12px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }
        .service-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(45deg, var(--primary-color), #0d6efd);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            color: white;
            font-size: 2rem;
        }
        .progress {
            height: 10px;
            border-radius: 5px;
            margin-bottom: 1.5rem;
        }
        .progress-bar {
            background-color: var(--accent-color);
            border-radius: 5px;
        }
        .news-item {
            border-bottom: 1px solid #eee;
            padding: 1.5rem 0;
            transition: var(--transition);
        }
        .news-item:hover {
            background-color: #f9f9f9;
            padding-left: 1rem;
        }
        .news-date {
            background-color: var(--primary-color);
            color: white;
            width: 70px;
            height: 70px;
            border-radius: 8px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            line-height: 1.2;
        }
        .team-img {
            width: 150px;
            height: 150px;
            border-radius: 50%;
            object-fit: cover;
            border: 5px solid #fff;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            margin-bottom: 1.5rem;
        }
        .contact-form .form-control {
            padding: 0.8rem 1rem;
            border-radius: 8px;
            border: 1px solid #ced4da;
            margin-bottom: 1.5rem;
            transition: var(--transition);
        }
        .contact-form .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(10, 88, 202, 0.25);
        }
        .friendlink {
            background-color: var(--light-bg);
            padding: 3rem 0;
        }
        .flink {
            display: inline-block;
            background-color: white;
            padding: 0.8rem 1.8rem;
            margin: 0.5rem;
            border-radius: 8px;
            color: #495057;
            text-decoration: none;
            font-weight: 500;
            border: 1px solid #dee2e6;
            transition: var(--transition);
        }
        .flink:hover {
            color: var(--primary-color);
            border-color: var(--primary-color);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        footer {
            background-color: var(--dark-bg);
            color: #adb5bd;
            padding-top: 4rem;
            padding-bottom: 2rem;
        }
        footer h5 {
            color: #f8f9fa;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.75rem;
        }
        footer h5::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 50px;
            height: 2px;
            background-color: var(--primary-color);
        }
        footer a {
            color: #adb5bd;
            text-decoration: none;
            transition: var(--transition);
        }
        footer a:hover {
            color: white;
            padding-left: 5px;
        }
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: #495057;
            border-radius: 50%;
            margin-right: 10px;
            color: white;
            transition: var(--transition);
        }
        .social-links a:hover {
            background-color: var(--primary-color);
            transform: translateY(-5px);
        }
        .copyright {
            border-top: 1px solid #495057;
            padding-top: 2rem;
            margin-top: 3rem;
            text-align: center;
            font-size: 0.9rem;
        }
        #backToTop {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 1000;
        }
        #backToTop.show {
            opacity: 1;
            visibility: visible;
        }
        #backToTop:hover {
            background-color: #0b5ed7;
            transform: scale(1.1);
        }
        @media (max-width: 992px) {
            .hero h1 {
                font-size: 2.8rem;
            }
            .section-padding {
                padding-top: 4rem;
                padding-bottom: 4rem;
            }
        }
        @media (max-width: 768px) {
            .hero {
                padding: 7rem 0 5rem;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            .section-title::after {
                width: 60px;
            }
        }