* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }
        body {
            background: #f9fafc;
            color: #1e2b3a;
            line-height: 1.6;
            scroll-behavior: smooth;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* 头部导航 */
        .header {
            background: linear-gradient(145deg, #002b4e, #0a3d62);
            color: white;
            padding: 16px 0;
            /*position: sticky;*/
            top: 0;
            z-index: 100;
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .logo a {
            font-size: 1.6rem;
            font-weight: 700;
            color: white;
            text-decoration: none;
            letter-spacing: 1px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .logo span {
            color: #fbbf24;
            font-weight: 300;
            font-size: 1rem;
            margin-left: 8px;
        }
        .nav ul {
            display: flex;
            gap: 24px;
            list-style: none;
            flex-wrap: wrap;
        }
        .nav ul li a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 40px;
            transition: background 0.2s;
            font-size: 1.05rem;
        }
        .nav ul li a:hover {
            background: rgba(255,255,255,0.2);
            text-decoration: underline 2px #fbbf24;
        }
        /* banner */
        .banner {
            background: linear-gradient(107deg, #0f2b44 0%, #1b4a6f 100%);
            color: white;
            padding: 50px 0;
            border-radius: 0 0 50px 50px;
            margin-bottom: 40px;
            box-shadow: 0 10px 30px rgba(0,40,70,0.3);
        }
        .banner-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }
        .banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.3;
            max-width: 900px;
            margin-bottom: 20px;
            text-shadow: 0 4px 8px rgba(0,0,0,0.3);
        }
        .banner p {
            font-size: 1.3rem;
            max-width: 750px;
            margin-bottom: 30px;
            opacity: 0.95;
        }
        .banner .cta-buttons {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .btn {
            background: #fbbf24;
            color: #0a2b44;
            padding: 14px 36px;
            border-radius: 60px;
            font-weight: 700;
            text-decoration: none;
            font-size: 1.2rem;
            box-shadow: 0 8px 16px rgba(0,0,0,0.2);
            transition: transform 0.2s, background 0.2s;
            border: 2px solid #fbbf24;
        }
        .btn-outline {
            background: transparent;
            color: white;
            border: 2px solid white;
        }
        .btn:hover {
            background: #ffd966;
            transform: scale(1.02);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.1);
        }
        /* 版块通用 */
        .section {
            background: white;
            border-radius: 40px;
            padding: 40px 36px;
            margin-bottom: 40px;
            box-shadow: 0 12px 30px rgba(0,0,0,0.05);
            transition: all 0.2s;
        }
        .section:nth-child(even) {
            background: #f0f6fe;
        }
        .section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 24px;
            color: #0a3d62;
            border-left: 12px solid #fbbf24;
            padding-left: 28px;
        }
        .section h2 i {
            font-style: normal;
            background: #fbbf24;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 1.2rem;
            margin-left: 18px;
            color: #002b4e;
        }
        .highlight {
            background: linear-gradient(120deg, #fef3c7 0%, #fde68a 80%);
            padding: 2px 8px;
            border-radius: 20px;
            font-weight: 600;
            color: #0a2b44;
        }
        strong, b {
            color: #b45309;
            font-weight: 700;
        }
        .keywords-badge {
            background: #e6f0fa;
            border-radius: 30px;
            padding: 6px 18px;
            display: inline-block;
            margin: 15px 0 5px;
            font-size: 0.9rem;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-top: 20px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3,1fr);
            gap: 25px;
        }
        @media (max-width: 768px) {
            .grid-2, .grid-3 {
                grid-template-columns: 1fr;
            }
            .header .container {
                flex-direction: column;
                gap: 15px;
            }
            .nav ul {
                justify-content: center;
                gap: 12px;
            }
            .banner h1 {
                font-size: 2rem;
            }
            .section {
                padding: 30px 20px;
            }
        }
        /* 平台按钮行 (一行五个) */
        .platform-row {
            display: flex;
            flex-wrap: nowrap;
            justify-content: space-between;
            gap: 12px;
            margin: 30px 0 20px;
        }
        .platform-btn {
            flex: 1 1 0;
            background: white;
            border: 2px solid #bfdbfe;
            border-radius: 60px;
            padding: 14px 4px;
            text-align: center;
            font-weight: 700;
            font-size: 1.1rem;
            color: #0a3d62;
            text-decoration: none;
            transition: all 0.25s;
            box-shadow: 0 4px 6px rgba(0,0,0,0.03);
            white-space: nowrap;
        }
        .platform-btn:hover {
            background: #0a3d62;
            color: white;
            border-color: #0a3d62;
            transform: translateY(-4px);
            box-shadow: 0 12px 20px rgba(10,61,98,0.2);
        }
        /* 常见问题卡片 */
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 25px 35px;
            margin: 30px 0;
        }
        .faq-item {
            background: white;
            border-radius: 30px;
            padding: 25px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.02);
            border: 1px solid rgba(0,80,130,0.1);
        }
        .faq-item h4 {
            font-size: 1.35rem;
            color: #1e476b;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .faq-item p {
            color: #2c3e50;
        }
        @media (max-width: 640px) {
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .platform-row {
                flex-wrap: wrap;
            }
            .platform-btn {
                flex: 0 0 calc(50% - 10px);
                white-space: normal;
                font-size: 1rem;
                padding: 12px 0;
            }
        }
        /* 站内链接 */
        .internal-links {
            margin-top: 40px;
            padding: 25px;
            background: #eef2f6;
            border-radius: 60px;
            text-align: center;
        }
        .internal-links a {
            margin: 0 16px;
            color: #075985;
            font-weight: 600;
            text-decoration: underline 2px #fbbf24;
        }
        .footer {
            background: #0a2b44;
            color: #cbd5e1;
            padding: 35px 0;
            border-radius: 40px 40px 0 0;
            margin-top: 50px;
            text-align: center;
        }
        .footer a {
            color: #fbbf24;
        }
        hr {
            border: 1px solid #d1d9e6;
            margin: 30px 0;
        }