/* 可复用主页面的CSS样式，保持风格统一 */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary: #0ea5e9;
            --light: #f0f9ff;
            --dark: #1e293b;
            --accent: #f59e0b;
            --gray: #64748b;
            --light-gray: #f1f5f9;
            --font-family: "Noto Sans SC", "仿宋", "FangSong", serif;
        }
        body {
            font-family: var(--font-family);
            line-height: 1.6;
            color: var(--dark);
            background-color: #ffffff;
            padding-top: 80px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        header {
            background: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
        }
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        .logo i {
            margin-right: 0.5rem;
            font-size: 1.8rem;
        }
        .section {
            padding: 3rem 0;
        }
        .section-title {
            margin-bottom: 2rem;
        }
        .section-title h2 {
            font-size: 2rem;
            position: relative;
            padding-bottom: 0.5rem;
        }
        .section-title h2:after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 60px;
            height: 4px;
            background: var(--accent);
        }
        .course-info {
            background: var(--light);
            padding: 2rem;
            border-radius: 10px;
            margin-bottom: 2rem;
        }
        .course-table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 2rem;
        }
        .course-table th, .course-table td {
            border: 1px solid var(--light-gray);
            padding: 1rem;
            text-align: left;
        }
        .course-table th {
            background-color: var(--primary);
            color: white;
        }
        .back-link {
            display: inline-block;
            margin-top: 2rem;
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
        }
        .back-link:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }