* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Helvetica, sans-serif;
            background-color: #ffffff;
            color: #333;
            line-height: 1.5;
            font-size: 14px;
            scroll-behavior: smooth;
        }

        /* 容器 */
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 链接 */
        a {
            text-decoration: none;
            color: #333;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #1f5068;
            text-decoration: none;
        }

        /* 按钮通用 */
        .btn {
            display: inline-block;
            padding: 10px 24px;
            border-radius: 32px;
            font-weight: 500;
            transition: all 0.2s;
            text-align: center;
            cursor: pointer;
            border: 1px solid transparent;
        }
        .btn-primary {
            background-color: #2c7da0;
            color: white;
        }
        .btn-primary:hover {
            background-color: #1f5e7a;
            text-decoration: none;
        }
        .btn-outline {
            border-color: #2c7da0;
            background: transparent;
            color: #2c7da0;
        }
        .btn-outline:hover {
            background-color: #eef7fc;
            text-decoration: none;
        }

        /* 模块间距 */
        section {
            padding: 60px 0;
            border-bottom: 1px solid #eef2f6;
        }
        section:last-of-type {
            border-bottom: none;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 32px;
            position: relative;
            display: inline-block;
            letter-spacing: -0.3px;
            color: #0f2b3a;
        }
        .section-header {
            display: flex;
            justify-content: space-between;
            align-items: baseline;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }
        .more-link {
            font-size: 15px;
            font-weight: 500;
        }

        /* 卡片通用样式 */
        .card {
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.03);
            transition: transform 0.2s, box-shadow 0.2s;
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -12px rgba(0,0,0,0.1);
        }

        /* 顶部导航栏 */
        .navbar {
            background: white;
            box-shadow: 0 1px 2px rgba(0,0,0,0.03), 0 1px 3px rgba(0,0,0,0.05);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 16px 24px;
            max-width: 1280px;
            margin: 0 auto;
        }
        .logo {
            font-size: 24px;
            font-weight: 700;
            color: #2c7da0;
            letter-spacing: -0.5px;
        }
        .nav-links {
            display: flex;
            gap: 28px;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-links a {
            color: #2d3e50;
            font-weight: 500;
        }
        .nav-links a:hover {
            color: #2c7da0;
        }
        .nav-sed{color: #2c7da0 !important;font-weight:600 !important;}
        .search-login {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .search-box {
            border: 1px solid #e2e8f0;
            border-radius: 40px;
            padding: 6px 16px;
            background: #f9fafb;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .search-box input {
            border: none;
            background: transparent;
            padding: 6px 0;
            outline: none;
            font-size: 14px;
            width: 150px;
        }
        .login-link {
            font-weight: 500;
        }
       /* 底部 */
        .footer {
            background: #0f2b3a;
            color: #cbd5e1;
            padding: 48px 0 32px;
            margin-top: 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-col h4 {
            color: white;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col a {
            color: #b9cddd;
            display: block;
            margin-bottom: 8px;
            font-size: 14px;
        }
        .copyright {
            text-align: center;
            padding-top: 24px;
            border-top: 1px solid #2c4a5e;
            font-size: 13px;
        }

        /* 响应式 */
        @media (max-width: 768px) {
            .nav-container {
                flex-direction: column;
                gap: 12px;
            }
            .hero-title {
                font-size: 32px;
            }
            .section-title {
                font-size: 24px;
            }
            .courses-grid {
                grid-template-columns: 1fr;
            }
        }

/*分页页码显示CSS开始*/
.pagination {
    text-align: center;
    margin: 40px 0;
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
}

.pagination ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 6px;
}

.pagination li {
    display: inline-block;
}

.pagination li a,
.pagination li span {
    display: inline-block;
    padding: 10px 18px;
    border-radius: 6px;
    text-decoration: none;
    color: #333;
    background-color: #fff;
    transition: all 0.3s ease;
    font-size: 14px;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    border: 1px solid #e6e6e6;
}

.pagination li a:hover {
    background-color: #f8f8f8;
    border-color: #4a90e2;
    color: #4a90e2;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.pagination li.active span {
    background-color: #ff6b6b;
    color: white;
    border-color: #ff6b6b;
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.2);
}

.pagination li.disabled span {
    color: #ccc;
    background-color: #fafafa;
    cursor: not-allowed;
    border-color: #f0f0f0;
    box-shadow: none;
}

.pagination li.dots span {
    border: none;
    background: none;
    color: #999;
    font-size: 18px;
    padding: 10px 8px;
    box-shadow: none;
    cursor: default;
}

/* 首页、尾页按钮特殊样式 */
.pagination li:first-child a,
.pagination li:first-child span,
.pagination li:last-child a,
.pagination li:last-child span {
    background-color: #f8f9fa;
    font-weight: 600;
    border-color: #dee2e6;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .pagination ul {
        gap: 4px;
    }
    
    .pagination li a,
    .pagination li span {
        padding: 8px 14px;
        font-size: 13px;
    }
    
    /* 手机端隐藏首页、尾页文字，只显示图标 */
    .pagination li:first-child a,
    .pagination li:first-child span,
    .pagination li:last-child a,
    .pagination li:last-child span {
        min-width: 60px;
    }
}
/*分页页码显示CSS结束*/
/*查询无内容时显示样式*/
.empty-state {
    grid-column: 1 / -1; /* 跨越所有列 */
    text-align: center;
    padding: 60px 30px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid #f0f0f0;
    margin: 20px 0;
    width: 100%;
    box-sizing: border-box;
}

.contents .empty-state {
    width: calc(100% - 2px); /* 减去边框宽度 */
    margin: 20px 0;
}

.empty-state-icon {
    margin-bottom: 25px;
}

.empty-state-icon i {
    font-size: 64px;
    color: #adb5bd;
    opacity: 0.7;
}

.empty-state-message h3 {
    font-size: 20px;
    color: #495057;
    margin-bottom: 15px;
    font-weight: 500;
}

.empty-state-message p {
    color: #6c757d;
    font-size: 15px;
    line-height: 1.5;
    max-width: 500px;
    margin: 0 auto 20px;
}

/* 响应式调整 */
@media (min-width: 768px) {
    .empty-state {
        padding: 70px 40px;
    }
}
/*查询无内容时显示样式结束*/