:root {
            --primary: #1a56db;
            --secondary: #0ea5e9;
            --accent: #f59e0b;
            --dark: #1f2937;
            --light: #f8fafc;
            --gray: #6b7280;
        }
        body {
            font-family: "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            background: linear-gradient(to right, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-section {
            background: linear-gradient(135deg, rgba(26,86,219,0.9) 0%, rgba(14,165,233,0.85) 100%), 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;
            padding: 120px 0;
            color: white;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 50px;
            font-weight: 700;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(to right, var(--primary), var(--accent));
            border-radius: 2px;
        }
        .card-hover {
            transition: all 0.3s ease;
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(26,86,219,0.15);
        }
        .icon-box {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: white;
            font-size: 1.8rem;
        }
        .btn-gradient {
            background: linear-gradient(to right, var(--primary), var(--secondary));
            border: none;
            color: white;
            padding: 12px 30px;
            border-radius: 8px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-gradient:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(26,86,219,0.2);
            color: white;
        }
        .stats-box {
            background: white;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            text-align: center;
        }
        .flink {
            display: inline-block;
            padding: 10px 20px;
            margin: 5px;
            background: var(--light);
            border-radius: 8px;
            color: var(--dark);
            text-decoration: none;
            transition: all 0.3s;
            border: 1px solid #e5e7eb;
        }
        .flink:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-3px);
        }
        footer {
            background: var(--dark);
            color: white;
        }
        .contact-info i {
            width: 24px;
            margin-right: 10px;
            color: var(--secondary);
        }
        .news-card {
            border-left: 4px solid var(--primary);
            padding-left: 20px;
        }
        .teacher-card img {
            width: 120px;
            height: 120px;
            object-fit: cover;
            border-radius: 50%;
            border: 4px solid var(--light);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .course-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            background: var(--accent);
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }