:root {
            --primary-color: #0a4d8c;
            --secondary-color: #e63946;
            --accent-color: #2a9d8f;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            line-height: 1.6;
            color: #333;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .nav-link {
            font-weight: 500;
            transition: var(--transition);
            margin: 0 5px;
        }
        .nav-link:hover {
            color: var(--secondary-color) !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(rgba(10, 77, 140, 0.85), rgba(42, 157, 143, 0.8)), url('https://images.unsplash.com/photo-1523050854058-8df90110c9f1?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 100px 0;
            min-height: 85vh;
            display: flex;
            align-items: center;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 45px;
            text-align: center;
            color: var(--primary-color);
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            border-radius: 2px;
        }
        .card-hover {
            transition: var(--transition);
            height: 100%;
            border: none;
            box-shadow: var(--shadow);
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
        }
        .icon-box {
            width: 70px;
            height: 70px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.8rem;
            transition: var(--transition);
        }
        .feature-card:hover .icon-box {
            background: var(--secondary-color);
            transform: rotateY(180deg);
        }
        .btn-primary-custom {
            background: var(--primary-color);
            border: none;
            padding: 12px 28px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background: var(--secondary-color);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(230, 57, 70, 0.3);
        }
        .campus-life-img {
            height: 250px;
            object-fit: cover;
            border-radius: 8px;
            transition: var(--transition);
        }
        .campus-life-img:hover {
            transform: scale(1.03);
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px;
            background: #f1f1f1;
            border-radius: 30px;
            color: var(--dark-color);
            text-decoration: none;
            transition: var(--transition);
            font-size: 0.9rem;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        .teacher-card {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .teacher-card:hover {
            transform: translateY(-8px);
        }
        .teacher-img {
            height: 220px;
            object-fit: cover;
        }
        footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding-top: 50px;
        }
        .footer-links a {
            color: #bdc3c7;
            text-decoration: none;
            transition: var(--transition);
            display: block;
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .social-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            margin-right: 10px;
            transition: var(--transition);
            color: white;
            text-decoration: none;
        }
        .social-icon:hover {
            background: var(--secondary-color);
            transform: translateY(-3px);
        }
        .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;
            text-decoration: none;
            opacity: 0;
            transition: var(--transition);
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
        }
        .back-to-top:hover {
            background: var(--secondary-color);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 60px 0;
                min-height: 70vh;
                text-align: center;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .navbar-nav {
                text-align: center;
                padding-top: 15px;
            }
            .teacher-card {
                margin-bottom: 25px;
            }
        }