* { margin:0; padding:0; box-sizing:border-box; }
        body {
            font-family: 'Inter', -apple-system, 'Segoe UI', Roboto, sans-serif;
            background: #f5faff;
            color: #0a2540;
            line-height: 1.6;
            scroll-behavior: smooth;
        }
        .container { max-width: 1280px; margin: 0 auto; padding: 0 40px; }

        /* ===== navbar ===== */
        .navbar {
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0,80,200,0.06);
            position: sticky; top:0; z-index:100;
            padding: 14px 0;
        }
        .nav-inner {
            display: flex; align-items: center; justify-content: space-between;
            flex-wrap: wrap; gap: 12px;
        }
        .logo-area {
            display: flex; align-items: center;
            text-decoration: none;
        }
        .logo-area img { height: 40px; width: auto; display: block; }
        .nav-links {
            display: flex; gap: 24px; align-items: center; flex-wrap: wrap;
        }
        .nav-links a {
            text-decoration: none; font-weight: 500; color: #1d3b5a;
            font-size: 0.92rem; transition: 0.2s; position: relative;
        }
        .nav-links a::after {
            content:''; position:absolute; bottom:-2px; left:0; width:0;
            height:2px; background: #0066ff; transition: width 0.3s;
        }
        .nav-links a:hover::after { width:100%; }
        .nav-links a:hover { color:#0066ff; }
        .nav-links a.active { color:#0066ff; }
        .nav-links a.active::after { width:100%; }
        .btn-nav {
            background: #0066ff; color:#fff !important;
            padding: 8px 24px; border-radius: 40px;
            font-weight:600; font-size:0.85rem;
            box-shadow: 0 4px 16px rgba(0,102,255,0.18);
            transition: all 0.3s;
        }
        .btn-nav::after { display:none !important; }
        .btn-nav:hover { background: #0052cc; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,102,255,0.25); }

        .section-badge {
            display: inline-block; background: rgba(0,102,255,0.04);
            border: 1px solid rgba(0,102,255,0.06); border-radius: 40px;
            padding: 3px 18px; font-size: 0.75rem; font-weight: 600;
            color: #0066ff; margin-bottom: 4px;
        }
        .section-title {
            font-size: 1.8rem; font-weight: 700; color: #0a2540;
        }
        .section-title i { color: #0066ff; margin-right: 8px; }
        .section-sub { color: #2f5478; font-size: 0.95rem; }

        /* ===== FAQ英雄区 ===== */
        .faq-hero {
            padding: 70px 0 60px;
            background: linear-gradient(135deg, #ffffff 0%, #e6f0ff 100%);
        }
        .faq-hero .hero-content {
            max-width: 820px; margin: 0 auto; text-align: center;
        }
        .faq-hero .hero-badge {
            display: inline-block; background: rgba(0,102,255,0.06);
            border: 1px solid rgba(0,102,255,0.08); border-radius: 40px;
            padding: 6px 22px; font-size: 0.85rem; font-weight: 600;
            color: #0066ff; margin-bottom: 14px;
        }
        .faq-hero h1 {
            font-size: 3.2rem; font-weight: 800; color: #0a2540;
            line-height: 1.08; margin-bottom: 12px;
        }
        .faq-hero h1 .highlight { color: #0066ff; }
        .faq-hero .hero-desc {
            font-size: 1.08rem; color: #2f5478; max-width: 720px;
            margin: 0 auto 20px; line-height: 1.9;
        }
        .faq-hero .hero-desc strong { color: #0a2540; }

        /* ===== 搜索框 ===== */
        .search-section { padding: 30px 0 50px; background: #ffffff; border-top: 1px solid rgba(0,102,255,0.04); }
        .search-box {
            max-width: 600px; margin: 0 auto; display: flex;
            border-radius: 60px; overflow: hidden; box-shadow: 0 4px 20px rgba(0,102,255,0.06);
            border: 1px solid rgba(0,102,255,0.04);
        }
        .search-box input {
            flex: 1; border: none; padding: 16px 24px;
            font-size: 1rem; outline: none; background: #ffffff;
        }
        .search-box button {
            background: #0066ff; color: #fff; border: none;
            padding: 16px 30px; font-size: 1rem; cursor: pointer;
            transition: 0.3s; font-weight: 600;
        }
        .search-box button:hover { background: #0052cc; }

        /* ===== 分类导航 ===== */
        .category-nav { padding: 20px 0 30px; background: #ffffff; border-top: 1px solid rgba(0,102,255,0.04); }
        .category-nav .cats {
            display: flex; flex-wrap: wrap; gap: 10px;
            justify-content: center;
        }
        .category-nav .cats .cat-btn {
            padding: 8px 22px; border-radius: 30px;
            border: 1px solid rgba(0,102,255,0.06);
            background: #ffffff; color: #1d3b5a;
            font-size: 0.85rem; cursor: pointer; transition: 0.3s;
            font-weight: 500;
        }
        .category-nav .cats .cat-btn:hover,
        .category-nav .cats .cat-btn.active {
            background: #0066ff; color: #fff; border-color: #0066ff;
        }

        /* ===== FAQ列表 ===== */
        .faq-list-section { padding: 30px 0 70px; background: #f7faff; border-top: 1px solid rgba(0,102,255,0.04); }
        .faq-group { margin-bottom: 40px; }
        .faq-group .group-title {
            font-size: 1.3rem; font-weight: 700; color: #0a2540;
            margin-bottom: 16px; display: flex; align-items: center; gap: 10px;
        }
        .faq-group .group-title i { color: #0066ff; }
        .faq-list {
            display: flex; flex-direction: column; gap: 10px;
        }
        .faq-item {
            background: #ffffff; border-radius: 16px;
            border: 1px solid rgba(0,102,255,0.03);
            overflow: hidden; transition: 0.3s;
        }
        .faq-item:hover { border-color: rgba(0,102,255,0.06); }
        .faq-item .q {
            padding: 16px 24px; font-weight: 700; color: #0a2540;
            display: flex; align-items: center; gap: 12px;
            cursor: pointer; user-select: none;
            transition: 0.2s;
        }
        .faq-item .q:hover { color: #0066ff; }
        .faq-item .q i.fa-chevron-right { color: #0066ff; transition: 0.3s; }
        .faq-item .q i.fa-chevron-down { color: #0066ff; }
        .faq-item .a {
            padding: 0 24px 16px 48px;
            color: #2f5478; font-size: 0.92rem; line-height: 1.8;
            display: none;
        }
        .faq-item .a strong { color: #0a2540; }
        .faq-item.open .a { display: block; }
        .faq-item.open .q i.fa-chevron-right { transform: rotate(90deg); }

        /* ===== 底部 ===== */
        .footer {
            background: #0a2540; color: rgba(255,255,255,0.7);
            padding: 50px 0 30px; border-top: 3px solid #0066ff;
        }
        .footer a { color: rgba(255,255,255,0.6); text-decoration: none; transition: 0.2s; }
        .footer a:hover { color: #ffffff; }
        .footer .footer-grid {
            display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px; margin-bottom: 30px;
        }
        .footer .brand-col .logo {
            font-size: 1.8rem; font-weight: 700; color: #fff;
            display: flex; align-items: center; gap: 10px; margin-bottom: 12px;
        }
        .footer .brand-col .logo i { color: #0066ff; }
        .footer .brand-col .logo span { color: #0066ff; }
        .footer .brand-col p { font-size: 0.9rem; line-height: 1.7; max-width: 340px; }
        .footer .col h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 14px; letter-spacing: 0.3px; }
        .footer .col ul { list-style: none; }
        .footer .col ul li { margin-bottom: 8px; }
        .footer .col ul li a { font-size: 0.9rem; }
        .footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 18px; display: flex; flex-wrap: wrap;
            justify-content: center; align-items: center; gap: 12px; font-size: 0.8rem;
        }
        .footer .footer-bottom .icp { color: rgba(255,255,255,0.4); text-align: center; }
        .footer .footer-bottom .icp a { color: rgba(255,255,255,0.4); }
        .footer .footer-bottom .icp a:hover { color: #fff; }
        .footer .footer-bottom .icp .sep { margin: 0 10px; color: rgba(255,255,255,0.15); }

        @media (max-width: 1024px) {
            .container { padding: 0 30px; }
            .faq-hero h1 { font-size: 2.6rem; }
            .footer .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .container { padding: 0 20px; }
            .nav-inner { flex-direction: column; align-items: center; }
            .nav-links { justify-content: center; gap: 10px; }
            .faq-hero h1 { font-size: 2.2rem; }
            .search-box { border-radius: 30px; }
            .search-box input { padding: 12px 18px; font-size: 0.9rem; }
            .search-box button { padding: 12px 20px; font-size: 0.9rem; }
            .faq-item .q { padding: 14px 18px; font-size: 0.9rem; }
            .faq-item .a { padding: 0 18px 14px 36px; font-size: 0.85rem; }
            .footer .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
            .footer .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 14px; }
            .faq-hero h1 { font-size: 1.8rem; }
            .footer .footer-grid { grid-template-columns: 1fr; gap: 20px; text-align: center; }
            .footer .brand-col p { max-width: 100%; }
            .category-nav .cats .cat-btn { padding: 6px 14px; font-size: 0.75rem; }
        }