* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: #fff;
            color: #1e293b;
            line-height: 1.5;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            flex-wrap: wrap;
            gap: 20px;
            border-bottom: 1px solid #e9eef3;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            background: linear-gradient(135deg, #1e2b3c, #2b5f8a);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            letter-spacing: -0.3px;
        }
        .nav-links {
            display: flex;
            gap: 32px;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: #334155;
            transition: color 0.2s;
            font-size: 1rem;
        }
        .nav-links a:hover { color: #2b5f8a; }
        .nav-links .active {
            color: #2b5f8a;
            border-bottom: 2px solid #2b5f8a;
            padding-bottom: 4px;
        }
        .btn-outline {
            display: inline-block;
            background: transparent;
            border: 1.5px solid #1e4a76;
            color: #1e4a76;
            font-weight: 600;
            padding: 10px 24px;
            border-radius: 40px;
            text-decoration: none;
            transition: 0.2s;
        }
        .btn-outline:hover { background-color: #eef4ff; }
        .btn-primary {
            display: inline-block;
            background-color: #1e4a76;
            color: white;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 40px;
            text-decoration: none;
            transition: all 0.25s;
            box-shadow: 0 4px 8px rgba(0,0,0,0.05);
        }
        .btn-primary:hover {
            background-color: #0f3a5c;
            transform: translateY(-2px);
        }

        .faq-header {
            text-align: center;
            padding: 56px 0 20px;
        }
        .faq-header h1 {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(135deg, #0f2b3d, #2b6a9f);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            margin-bottom: 16px;
        }
        .faq-header p {
            font-size: 1.2rem;
            color: #475569;
            max-width: 700px;
            margin: 0 auto;
        }

        /* 搜索条创意 */
        .search-faq {
            max-width: 620px;
            margin: 32px auto 20px;
            display: flex;
            background: #f8fafc;
            border-radius: 60px;
            padding: 6px 6px 6px 24px;
            border: 1px solid #dde5ef;
        }
        .search-faq input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 14px 0;
            font-size: 1rem;
            outline: none;
        }
        .search-faq button {
            background: #1e4a76;
            border: none;
            color: white;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
        }

        /* 热门标签云 */
        .hot-topics-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin: 20px 0 30px;
        }
        .topic-tag {
            background: #eef2ff;
            color: #1e4a76;
            padding: 8px 20px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            text-decoration: none;
            transition: background 0.2s;
            border: 1px solid transparent;
        }
        .topic-tag:hover {
            background: #d9e6ff;
            border-color: #a0bbd8;
        }

        .faq-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin: 20px 0 30px;
        }
        .tab-btn {
            background: transparent;
            border: 1px solid #d0ddee;
            color: #2b5f8a;
            padding: 8px 22px;
            border-radius: 40px;
            font-weight: 500;
            cursor: pointer;
            transition: 0.2s;
        }
        .tab-btn.active {
            background: #1e4a76;
            color: white;
            border-color: #1e4a76;
        }

        /* FAQ列表样式 (与原折叠一致) */
        .faq-category {
            margin-bottom: 48px;
        }
        .category-title {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 24px;
            color: #0f2b3d;
            border-left: 6px solid #2b6a9f;
            padding-left: 20px;
        }
        .faq-item {
            background: #ffffff;
            border-radius: 24px;
            margin-bottom: 16px;
            border: 1px solid #eef2f6;
            transition: box-shadow 0.2s;
        }
        .faq-item.open {
            box-shadow: 0 10px 25px -8px rgba(0,0,0,0.08);
        }
        .faq-question {
            padding: 22px 28px;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: #1e293b;
        }
        .faq-answer {
            padding: 0 28px 24px 28px;
            color: #475569;
            border-top: 1px dashed #d9e2ec;
            margin-top: 6px;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-question .icon {
            font-size: 1.2rem;
            transition: transform 0.2s;
        }
        .faq-item.open .icon {
            transform: rotate(180deg);
        }

        /* 创意板块：快速诊断卡片 */
        .quick-diagnose {
            background: linear-gradient(105deg, #f0f6fe, #ffffff);
            border-radius: 48px;
            padding: 40px 36px;
            margin: 50px 0;
            border: 1px solid #d4e3f5;
        }
        .diagnose-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
        }
        .diagnose-item {
            flex: 1;
            min-width: 200px;
            background: white;
            border-radius: 28px;
            padding: 24px;
            box-shadow: 0 8px 18px -6px rgba(0,0,0,0.04);
        }
        .diagnose-item h4 {
            display: flex;
            gap: 10px;
            margin-bottom: 12px;
            color: #1e4a76;
        }

        /* 社区支持模块 */
        .support-extra {
            background: #1e2f3c;
            border-radius: 48px;
            padding: 36px 40px;
            margin: 40px 0;
            color: white;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 30px;
        }
        .support-extra h3 {
            font-size: 1.9rem;
        }
        .support-extra .btn-light {
            background: white;
            color: #1e2f3c;
            padding: 14px 32px;
            border-radius: 60px;
            text-decoration: none;
            font-weight: 700;
        }

        .footer {
            background-color: #f9fbfd;
            border-top: 1px solid #e9edf2;
            padding: 40px 0 24px;
            margin-top: 40px;
            text-align: center;
            font-size: 0.85rem;
            color: #6c7a91;
        }

        @media (max-width: 680px) {
            .faq-header h1 { font-size: 2.2rem; }
            .navbar { flex-direction: column; align-items: flex-start; }
        }
        /* 隐藏内容控制 (用于标签切换) */
        .faq-category.hidden-cat { display: none; }