* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: "Microsoft YaHei", system-ui, sans-serif;
            background-color: #f7f9fc;
            color: #2d3748;
            line-height: 1.75;
        }
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 20px;
        }
        /* 顶部全局导航 */
        .top-nav {
            max-width: 1240px;
            margin: 30px auto 0;
            padding: 0 20px;
            display: flex;
            gap: 30px;
            justify-content: center;
        }
        .top-nav a {
            font-size: 16px;
            color: #555;
            text-decoration: none;
            padding: 8px 18px;
            border-radius: 8px;
            transition: 0.2s all ease;
        }
        .top-nav a.active {
            background-color: #2563eb;
            color: #fff;
        }
        .top-nav a:hover:not(.active) {
            color: #2563eb;
            background-color: #eff6ff;
        }
         /* 头部横幅 */
        .hero {
            background: linear-gradient(130deg, #2563eb, #1d4ed8);
            color: #fff;
            padding: 70px 0;
            text-align: center;
            
        }
        .hero h1 {
            font-size: 40px;
            margin-bottom: 16px;
        }
        .hero p {
            font-size: 18px;
            opacity: 0.92;
            max-width: 850px;
            margin: 0 auto;
        }
        .page-wrap {
    max-width: 1240px;
    margin: 40px auto;
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 36px;
    padding: 0 20px;
}