:root {
            --primary: #1a5fb4;
            --secondary: #ff9800;
            --dark: #333333;
            --light: #f8f9fa;
            --success: #28a745;
        }
        body {
            font-family: "Microsoft YaHei", "Segoe UI", sans-serif;
            line-height: 1.8;
            color: var(--dark);
        }
        .hero-section {
            background: linear-gradient(rgba(26, 95, 180, 0.85), rgba(26, 95, 180, 0.9)), url('https://images.unsplash.com/photo-1486401899868-0e435ed85128?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0 100px;
            min-height: 80vh;
            display: flex;
            align-items: center;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 45px;
        }
        .section-title:after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 80px;
            height: 4px;
            background: var(--secondary);
        }
        .section-title.text-center:after {
            left: 50%;
            transform: translateX(-50%);
        }
        .card-hover {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1) !important;
        }
        .nav-link {
            font-weight: 500;
            transition: color 0.3s;
        }
        .nav-link:hover {
            color: var(--secondary) !important;
        }
        .btn-primary {
            background-color: var(--primary);
            border-color: var(--primary);
            padding: 10px 30px;
            font-weight: 500;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: #0d4a9c;
            border-color: #0d4a9c;
            transform: translateY(-3px);
        }
        .btn-secondary {
            background-color: var(--secondary);
            border-color: var(--secondary);
            padding: 10px 30px;
            font-weight: 500;
            transition: all 0.3s;
        }
        .btn-secondary:hover {
            background-color: #e68900;
            border-color: #e68900;
            transform: translateY(-3px);
        }
        .feature-icon {
            width: 70px;
            height: 70px;
            background: rgba(26, 95, 180, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--primary);
            font-size: 28px;
        }
        .stats-box {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            text-align: center;
            transition: all 0.3s;
        }
        .stats-box:hover {
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        .stats-number {
            font-size: 42px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .flink {
            display: inline-block;
            padding: 10px 20px;
            background: var(--light);
            border-radius: 5px;
            margin: 5px 10px 5px 0;
            transition: all 0.3s;
            color: var(--dark);
            text-decoration: none;
            border: 1px solid #eee;
        }
        .flink:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-3px);
        }
        .course-card {
            height: 100%;
            border: none;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
        }
        .course-card .card-img-top {
            height: 200px;
            object-fit: cover;
        }
        footer {
            background: #2c3e50;
            color: #ecf0f1;
        }
        footer a {
            color: #bdc3c7;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: var(--secondary);
        }
        .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: all 0.3s;
        }
        .social-icon:hover {
            background: var(--primary);
            transform: translateY(-5px);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--secondary);
            color: white;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0 60px;
                min-height: 60vh;
            }
            .section-title {
                margin-bottom: 30px;
            }
            .stats-number {
                font-size: 32px;
            }
        }
        .testimonial-card {
            border-left: 5px solid var(--secondary);
            padding-left: 20px;
            background: var(--light);
            padding: 25px;
            border-radius: 0 10px 10px 0;
        }
        .process-step {
            position: relative;
            padding-left: 40px;
            margin-bottom: 30px;
        }
        .process-step-number {
            position: absolute;
            left: 0;
            top: 0;
            width: 30px;
            height: 30px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }
        .instructor-card {
            text-align: center;
            padding: 30px 20px;
            border-radius: 15px;
            background: white;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s;
        }
        .instructor-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .instructor-img {
            width: 150px;
            height: 150px;
            border-radius: 50%;
            object-fit: cover;
            margin: 0 auto 20px;
            border: 5px solid var(--light);
        }
        .news-card {
            transition: all 0.3s;
            border: none;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        .news-date {
            position: absolute;
            top: 15px;
            right: 15px;
            background: var(--primary);
            color: white;
            padding: 5px 15px;
            border-radius: 30px;
            font-size: 14px;
        }