:root {
            --primary-color: #1a365d;
            --secondary-color: #c53030;
            --accent-color: #ed8936;
            --light-color: #f7fafc;
            --dark-color: #2d3748;
            --text-color: #4a5568;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Noto Sans SC', sans-serif;
            color: var(--text-color);
            line-height: 1.8;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-family: 'Noto Serif SC', serif;
            color: var(--primary-color);
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .container-fluid {
            padding-left: 0;
            padding-right: 0;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            padding: 1rem 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 500;
            color: var(--dark-color) !important;
            margin: 0 0.5rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover {
            color: var(--secondary-color) !important;
        }
        .nav-link.active {
            color: var(--secondary-color) !important;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 10%;
            width: 80%;
            height: 2px;
            background-color: var(--secondary-color);
        }
        .hero-section {
            background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(26, 54, 93, 0.9)), url('https://images.unsplash.com/photo-1486406146926-c627a92ad1ab?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            color: white;
            padding: 10rem 0 8rem;
            position: relative;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            color: white;
            text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
        }
        .hero-subtitle {
            font-size: 1.3rem;
            max-width: 700px;
            margin: 0 auto 2.5rem;
            opacity: 0.9;
        }
        .btn-primary-custom {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: white;
            padding: 0.8rem 2.5rem;
            font-weight: 600;
            border-radius: 50px;
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background-color: #9b2c2c;
            border-color: #9b2c2c;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        .section-padding {
            padding: 6rem 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 3.5rem;
            position: relative;
        }
        .section-title h2 {
            display: inline-block;
            font-size: 2.5rem;
            padding-bottom: 1rem;
        }
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--secondary-color);
        }
        .section-subtitle {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 3rem;
            font-size: 1.1rem;
            color: var(--text-color);
        }
        .service-card, .case-card, .team-card, .news-card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
            height: 100%;
        }
        .service-card:hover, .case-card:hover, .team-card:hover, .news-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        }
        .card-icon {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
            display: inline-block;
        }
        .about-img {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 15px 15px 30px rgba(0, 0, 0, 0.1);
        }
        .services-section {
            background-color: var(--light-color);
        }
        .case-card img {
            height: 250px;
            object-fit: cover;
            transition: var(--transition);
        }
        .case-card:hover img {
            transform: scale(1.05);
        }
        .team-img {
            height: 280px;
            object-fit: cover;
            border-bottom: 1px solid #eee;
        }
        .social-icons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: #f1f1f1;
            border-radius: 50%;
            color: var(--dark-color);
            margin: 0 5px;
            transition: var(--transition);
        }
        .social-icons a:hover {
            background-color: var(--secondary-color);
            color: white;
        }
        .news-date {
            background-color: var(--primary-color);
            color: white;
            position: absolute;
            top: 20px;
            left: 20px;
            padding: 10px 15px;
            border-radius: 5px;
            text-align: center;
            line-height: 1.2;
        }
        .news-date .day {
            font-size: 1.8rem;
            font-weight: 700;
            display: block;
        }
        .contact-section {
            background-color: var(--light-color);
        }
        .contact-info-box {
            background-color: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            height: 100%;
            transition: var(--transition);
        }
        .contact-info-box:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
        }
        .contact-icon {
            font-size: 2.5rem;
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
        }
        .friendlink-section {
            background-color: var(--dark-color);
            color: white;
            padding: 4rem 0;
        }
        .friendlink-section .section-title h2 {
            color: white;
        }
        .friendlink-section .section-title h2::after {
            background-color: var(--accent-color);
        }
        .flink {
            display: inline-block;
            background-color: rgba(255, 255, 255, 0.1);
            color: #ddd;
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            border-radius: 50px;
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .flink:hover {
            background-color: var(--accent-color);
            color: white;
            border-color: var(--accent-color);
            transform: translateY(-3px);
        }
        footer {
            background-color: #1a202c;
            color: #a0aec0;
            padding: 4rem 0 2rem;
        }
        footer h5 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        footer a {
            color: #cbd5e0;
            text-decoration: none;
            transition: var(--transition);
        }
        footer a:hover {
            color: var(--accent-color);
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .copyright {
            border-top: 1px solid #2d3748;
            padding-top: 2rem;
            margin-top: 3rem;
            text-align: center;
            font-size: 0.9rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--secondary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 999;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--primary-color);
        }
        @media (max-width: 992px) {
            .hero-title {
                font-size: 2.8rem;
            }
            .section-padding {
                padding: 4rem 0;
            }
            .section-title h2 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.3rem;
            }
            .hero-section {
                padding: 8rem 0 6rem;
            }
            .navbar-brand {
                font-size: 1.5rem;
            }
            .section-title h2 {
                font-size: 2rem;
            }
        }
        @media (max-width: 576px) {
            .hero-title {
                font-size: 2rem;
            }
            .hero-subtitle {
                font-size: 1.1rem;
            }
            .section-padding {
                padding: 3rem 0;
            }
        }