* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft Yahei", sans-serif;
        }
        :root {
            --primary: #1677ff;
            --primary-dark: #0958d9;
            --dark: #1f2937;
            --gray: #666;
            --light: #f5f7fa;
            --success: #00b42a;
            --white: #ffffff;
        }
        body {
            color: var(--dark);
            background: #fff;
            line-height: 1.6;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        /* 头部导航 */
        header {
            background: #fff;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
            position: sticky;
            top: 0;
            z-index: 999;
        }
        .nav-wrap {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }
        .logo {
            font-size: 24px;
            font-weight: bold;
            color: var(--primary);
            text-decoration: none;
        }
        .logo span {
            color: var(--dark);
            font-size: 16px;
            margin-left: 8px;
        }
        .nav-menu {
            display: flex;
            gap: 30px;
        }
        .nav-menu a {
            text-decoration: none;
            color: var(--dark);
            font-size: 15px;
            transition: color 0.3s;
        }
        .nav-menu a:hover {
            color: var(--primary);
        }
        .mobile-menu {
            display: none;
            font-size: 24px;
            cursor: pointer;
        }
        /* 横幅 */
        .banner {
            background: linear-gradient(135deg, #1677ff 0%, #40a9ff 100%);
            color: #fff;
            padding: 80px 0;
            text-align: center;
        }
        .banner h1 {
            font-size: 42px;
            margin-bottom: 20px;
        }
        .banner p {
            font-size: 18px;
            opacity: 0.95;
            max-width: 800px;
            margin: 0 auto 30px;
        }
        .btn {
            display: inline-block;
            padding: 12px 30px;
            background: #fff;
            color: var(--primary);
            font-weight: bold;
            border-radius: 30px;
            text-decoration: none;
            transition: all 0.3s;
            border: none;
            cursor: pointer;
        }
        .btn:hover {
            background: var(--dark);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-primary {
            background: var(--primary-dark);
            color: #fff;
        }
        .btn-primary:hover {
            background: #0548b3;
        }
        /* 通用区块 */
        .section {
            padding: 60px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-title h2 {
            font-size: 32px;
            color: var(--dark);
            margin-bottom: 12px;
        }
        .section-title p {
            color: var(--gray);
            font-size: 16px;
        }
        /* 网格通用布局 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        /* 核心产品卡片 */
        .product-card {
            background: #fff;
            box-shadow: 0 4px 15px rgba(0,0,0,0.06);
            border-radius: 12px;
            padding: 30px 20px;
            text-align: center;
            transition: transform 0.3s;
        }
        .product-card:hover {
            transform: translateY(-5px);
        }
        .product-card h3 {
            color: var(--primary);
            margin-bottom: 15px;
            font-size: 18px;
        }
        .product-card p {
            color: var(--gray);
            font-size: 14px;
        }
        /* 网站优势板块 */
        .advantage {
            background: var(--light);
        }
        .adv-card {
            background: #fff;
            padding: 30px 20px;
            border-radius: 12px;
            text-align: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
            transition: 0.3s;
        }
        .adv-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(22,119,255,0.15);
        }
        .adv-card h3 {
            font-size: 18px;
            color: var(--dark);
            margin: 15px 0 10px;
        }
        .adv-card p {
            font-size: 14px;
            color: var(--gray);
        }
        /* 实力数据板块 */
        .data-item {
            padding:30px 10px;
            background: linear-gradient(135deg,#1677ff,#40a9ff);
            border-radius:12px;
            color:#fff;
            text-align:center;
        }
        .data-item h4 {
            font-size:36px;
            margin-bottom:8px;
        }
        .data-item p {
            font-size:15px;
            opacity:0.9;
        }
        /* 课程套餐板块 */
        .price-card {
            background: #fff;
            border-radius:12px;
            box-shadow:0 4px 20px rgba(0,0,0,0.08);
            overflow:hidden;
            transition:0.3s;
        }
        .price-card:hover {
            transform:translateY(-6px);
        }
        .price-top {
            background:var(--primary);
            color:#fff;
            text-align:center;
            padding:20px;
        }
        .price-body {
            padding:25px 20px;
        }
        .price-body ul {
            list-style:none;
        }
        .price-body li {
            padding:8px 0;
            border-bottom:1px solid #f0f0f0;
            font-size:14px;
        }
        .price-bottom {
            text-align:center;
            padding:20px;
        }
        /* 学员收益板块 */
        .case-card {
            background:#fff;
            padding:25px;
            border-radius:12px;
            box-shadow:0 4px 15px rgba(0,0,0,0.05);
            transition: 0.3s;
        }
        .case-card:hover {
            transform: translateY(-5px);
        }
        .case-card h4 {
            color:var(--primary);
            margin-bottom:10px;
            font-size: 18px;
        }
        /* 新闻资讯板块 */
        .news-card {
            background: #fff;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
            overflow: hidden;
            transition: 0.3s;
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(22,119,255,0.12);
        }
        .news-date {
            background: var(--primary);
            color: #fff;
            padding: 8px 15px;
            font-size: 13px;
        }
        .news-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-body h4 {
            font-size: 16px;
            color: var(--dark);
            margin-bottom: 10px;
            line-height: 1.5;
        }
        .news-body p {
            font-size: 14px;
            color: var(--gray);
            margin-bottom: 15px;
            flex: 1;
        }
        .news-more {
            color: var(--primary);
            font-size: 14px;
            text-decoration: none;
            font-weight: bold;
        }
        /* 报名召唤板块 */
        .apply {
            background: linear-gradient(135deg,#0958d9,#1677ff);
            color:#fff;
            text-align:center;
        }
        .apply h2 {
            font-size:32px;
            margin-bottom:20px;
        }
        .apply p {
            max-width:800px;
            margin:0 auto 30px;
            opacity:0.95;
            font-size:17px;
        }
        /* 课程大纲 */
        .course-box {
            background: var(--light);
            border-radius: 12px;
            padding: 30px;
            margin-bottom: 30px;
        }
        .course-box h3 {
            color: var(--primary);
            font-size: 20px;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }
        .course-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .course-item {
            font-size: 15px;
            color: var(--dark);
            padding: 8px 12px;
            border-radius: 6px;
            background: #fff;
        }
        /* 关于我们正文 */
        .about-text {
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
            font-size: 16px;
            color: var(--gray);
            line-height: 2;
        }
        footer {
            background: var(--dark);
            color: #ccc;
            padding: 40px 0;
            text-align: center;
        }
        footer p {
            font-size: 14px;
        }
        /* 响应式适配 */
        @media (max-width: 992px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-4 {
                grid-template-columns: repeat(2,1fr);
            }
            .banner h1 {
                font-size: 32px;
            }
        }
        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }
            .mobile-menu {
                display: block;
            }
            .grid-3,.grid-4 {
                grid-template-columns: 1fr;
            }
            .banner {
                padding: 50px 0;
            }
            .banner h1 {
                font-size: 28px;
            }
            .section-title h2 {
                font-size: 24px;
            }
            .course-box {
                padding: 20px 15px;
            }
        }