* { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            min-height: 100vh;
            background-color: #f1fbf8;
            background-image: radial-gradient(circle at 50% 15%, rgba(204, 251, 241, 0.7) 0%, rgba(241, 251, 248, 0) 65%);
            color: #1f2937;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            -webkit-font-smoothing: antialiased;
        }
        
        /* 顶部导航条：薄荷绿协调配色 + 毛玻璃质感 */
        header {
            width: 100%;
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(241, 251, 248, 0.82);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(13, 148, 136, 0.15);
            box-shadow: 0 4px 20px rgba(13, 148, 136, 0.04);
            padding: 14px 0;
        }
        .header-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; padding: 0 40px; }
        
        .logo-area { 
            font-size: 17px; 
            font-weight: 900; 
            color: #111827; 
            text-decoration: none; 
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
        }
        .logo-dot {
            width: 9px;
            height: 9px;
            background: #0d9488;
            border-radius: 50%;
            margin-right: 8px;
            box-shadow: 0 0 8px rgba(13, 148, 136, 0.6);
        }

        .header-nav { display: flex; gap: 16px; font-size: 13.5px; align-items: center; }
        
        /* 第一个导航链接样式（次要/描边或柔和背景按钮） */
        .header-nav .nav-link-sub {
            text-decoration: none;
            color: #0d9488;
            background: rgba(13, 148, 136, 0.08);
            padding: 7px 16px;
            border-radius: 20px;
            font-weight: 600;
            transition: all 0.2s;
        }
        .header-nav .nav-link-sub:hover {
            background: rgba(13, 148, 136, 0.15);
        }

        /* 第二个导航链接样式（主要/实心高亮按钮） */
        .header-nav .nav-link-main { 
            text-decoration: none; 
            color: #ffffff;
            background: #0d9488;
            padding: 7px 16px;
            border-radius: 20px;
            font-weight: 600;
            box-shadow: 0 3px 10px rgba(13, 148, 136, 0.25);
            transition: all 0.2s;
        }
        .header-nav .nav-link-main:hover { background: #0f766e; transform: translateY(-1px); }

        main { max-width: 1000px; margin: 30px auto auto auto; padding: 0 20px; width: 100%; text-align: center; }
        
        .sub-tag { font-size: 12px; color: #0d9488; margin-bottom: 14px; font-weight: 600; letter-spacing: 0.3px; }
        h1 { font-size: clamp(36px, 5vw, 48px); font-weight: 900; color: #111827; margin: 0 0 16px 0; letter-spacing: -1.5px; }
        p.desc { font-size: 14.5px; color: #4b5563; max-width: 640px; margin: 0 auto 36px auto; line-height: 1.6; }

        /* 搜索框美化（带左侧钱包小图标） */
        .search-box {
            display: flex;
            align-items: center;
            background: #ffffff;
            border: 1px solid #cbd5e1;
            border-radius: 40px;
            padding: 6px;
            max-width: 720px;
            margin: 0 auto 48px auto;
            box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05), 0 8px 10px -6px rgba(0,0,0,0.05);
            transition: all 0.25s ease;
        }
        .search-box:focus-within {
            border-color: #0d9488;
            box-shadow: 0 0 0 4px rgba(13, 148, 136, 0.12), 0 10px 25px -5px rgba(0,0,0,0.05);
        }
        .search-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            padding-left: 18px;
            color: #0d9488;
        }
        .search-box input {
            flex: 1;
            border: none;
            outline: none;
            padding: 12px 14px;
            font-size: 15px;
            background: transparent;
            color: #111827;
        }
        .search-box button {
            background: #0d9488;
            color: #fff;
            border: none;
            border-radius: 32px;
            padding: 12px 34px;
            font-weight: bold;
            font-size: 15px;
            cursor: pointer;
            box-shadow: 0 4px 12px rgba(13, 148, 136, 0.25);
            transition: background 0.2s, transform 0.1s;
        }
        .search-box button:hover { background: #0f766e; }
        .search-box button:active { transform: scale(0.98); }

        /* 三个核心特性卡片网格 */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
            text-align: left;
        }
        .feature-card {
            background: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 16px;
            padding: 22px 24px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.02);
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .feature-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.04);
        }
        .feature-card .tag { font-size: 11px; color: #0d9488; font-weight: bold; margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.5px; }
        .feature-card h3 { font-size: 15px; font-weight: bold; color: #111827; margin-bottom: 8px; }
        .feature-card p { font-size: 12.5px; color: #64748b; line-height: 1.5; margin: 0; }

        /* 常见问题大卡片区 */
        .faq-section {
            background: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 20px;
            padding: 28px 30px;
            margin-bottom: 40px;
            text-align: left;
            box-shadow: 0 4px 16px rgba(0,0,0,0.02);
        }
        .faq-header-tag { font-size: 11px; color: #0d9488; font-weight: bold; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 6px; }
        .faq-title { font-size: 20px; font-weight: 900; color: #111827; margin-bottom: 8px; }
        .faq-desc { font-size: 13px; color: #64748b; margin-bottom: 22px; }
        
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }
        .faq-item {
            background: #f8fafc;
            border: 1px solid #f1f5f9;
            border-radius: 12px;
            padding: 16px 18px;
        }
        .faq-item h4 { font-size: 13.5px; font-weight: bold; color: #1e293b; margin-bottom: 6px; }
        .faq-item p { font-size: 12px; color: #64748b; line-height: 1.5; margin: 0; }

        footer { text-align: center; padding: 24px; font-size: 12px; color: #94a3b8; border-top: 1px solid rgba(226, 232, 240, 0.6); }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .header-container { padding: 0 20px; }
            main { padding: 0 15px; }
            .search-box { flex-direction: column; border-radius: 20px; padding: 10px; background: transparent; border: none; box-shadow: none; }
            .search-icon { display: none; }
            .search-box input { width: 100%; background: #fff; border: 1px solid #cbd5e1; border-radius: 30px; padding: 12px 20px; margin-bottom: 10px; }
            .search-box button { width: 100%; border-radius: 30px; padding: 12px 0; }
        }
        /* 美化后的底部样式 */
footer {
    text-align: center;
    padding: 30px 20px;
    font-size: 13px;
    color: #64748b;
    border-top: 1px solid rgba(13, 148, 136, 0.1);
    background: rgba(241, 251, 248, 0.5);
    margin-top: auto;
}
.footer-content {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
}
.footer-divider {
    color: #cbd5e1;
}
.footer-brand {
    color: #0d9488;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.2s;
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(13, 148, 136, 0.08);
}
.footer-brand:hover {
    color: #ffffff;
    background: #0d9488;
    text-decoration: none;
}