* { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: linear-gradient(145deg, #f0f9ff 0%, #e0f2fe 100%); color: #1e293b; line-height: 1.7; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

        /* 导航 */
        nav { background: rgba(255,255,255,0.85); backdrop-filter: blur(12px); border-bottom: 1px solid rgba(14,165,233,0.15); position: sticky; top: 0; z-index: 100; padding: 16px 0; }
        .nav-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
        .nav-links { display: flex; gap: 24px; flex-wrap: wrap; }
        .nav-links a { text-decoration: none; color: #0c4a6e; font-weight: 600; font-size: 0.95rem; transition: 0.2s; padding: 6px 0; border-bottom: 2px solid transparent; }
        .nav-links a:hover { color: #0ea5e9; border-bottom-color: #0ea5e9; }
        .nav-brand { font-size: 1.3rem; font-weight: 800; background: linear-gradient(135deg, #0ea5e9, #7dd3fc); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

        /* 标题 */
        h1 { font-size: 2.5rem; font-weight: 800; color: #0c4a6e; text-align: center; margin: 48px 0 16px; letter-spacing: -0.02em; }
        h2 { font-size: 1.8rem; font-weight: 700; color: #0c4a6e; margin: 48px 0 24px; text-align: center; position: relative; }
        h2::after { content: ''; display: block; width: 60px; height: 4px; background: linear-gradient(90deg, #0ea5e9, #7dd3fc); margin: 12px auto 0; border-radius: 4px; }
        h3 { font-size: 1.2rem; font-weight: 700; color: #0c4a6e; margin-bottom: 12px; }

        /* 卡片 */
        .card { background: rgba(255,255,255,0.7); backdrop-filter: blur(4px); border-radius: 24px; padding: 32px; margin: 24px 0; box-shadow: 0 8px 32px rgba(14,165,233,0.08); border: 1px solid rgba(255,255,255,0.5); transition: transform 0.2s; }
        .card:hover { transform: translateY(-4px); }
        .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
        .grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; }
        img { max-width: 100%; height: auto; border-radius: 16px; margin: 16px 0; box-shadow: 0 4px 16px rgba(0,0,0,0.06); }

        /* 页脚 */
        footer { background: linear-gradient(135deg, #0c4a6e, #0ea5e9); color: #f0f9ff; padding: 48px 0 24px; margin-top: 64px; border-radius: 32px 32px 0 0; }
        .footer-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 32px; margin-bottom: 32px; }
        .footer-grid a { color: #bae6fd; text-decoration: none; font-size: 0.9rem; }
        .footer-grid a:hover { color: #fff; text-decoration: underline; }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.2); padding-top: 24px; font-size: 0.85rem; text-align: center; }
        .footer-bottom a { color: #bae6fd; text-decoration: none; margin: 0 8px; }
        .footer-bottom a:hover { color: #fff; }

        /* 列表 */
        ul { list-style: none; padding-left: 0; }
        li { padding: 6px 0; }
        .faq-item { border-bottom: 1px solid rgba(14,165,233,0.1); padding: 20px 0; }
        .faq-item:last-child { border-bottom: none; }
        .faq-question { font-weight: 700; color: #0c4a6e; margin-bottom: 8px; font-size: 1.05rem; }

        /* 自适应 */
        @media (max-width: 768px) {
            .grid-2, .grid-3 { grid-template-columns: 1fr; }
            .nav-inner { flex-direction: column; align-items: flex-start; }
            h1 { font-size: 1.8rem; }
        }

        /* 按钮 */
        .btn { display: inline-block; background: linear-gradient(135deg, #0ea5e9, #7dd3fc); color: #fff; padding: 12px 32px; border-radius: 40px; font-weight: 700; text-decoration: none; transition: 0.2s; border: none; cursor: pointer; }
        .btn:hover { transform: scale(1.03); box-shadow: 0 8px 24px rgba(14,165,233,0.3); }
        .text-center { text-align: center; }

        /* 标签 */
        .tag { display: inline-block; background: rgba(14,165,233,0.1); color: #0ea5e9; padding: 4px 14px; border-radius: 40px; font-size: 0.8rem; font-weight: 600; margin-right: 8px; }