:root{
      --bg:#f5f7fb;
      --panel:#ffffff;
      --panel-2:#f8fbff;
      --text:#1b2430;
      --muted:#5b6575;
      --line:#dce5f1;
      --brand:#1f6fff;
      --brand-2:#00c2ff;
      --accent:#ffb000;
      --shadow:0 18px 40px rgba(20,45,92,.08);
      --shadow-2:0 10px 24px rgba(31,111,255,.14);
      --radius:20px;
      --radius-sm:14px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:linear-gradient(180deg,#eef5ff 0%,#f8fbff 24%,#f5f7fb 100%);color:var(--text)}
    a{color:var(--brand);text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    header{position:sticky;top:0;z-index:50;background:rgba(245,247,251,.86);backdrop-filter:blur(14px);border-bottom:1px solid rgba(220,229,241,.7)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 0}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand img{width:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;box-shadow:0 8px 20px rgba(31,111,255,.12)}
    .brand .name{font-weight:800;letter-spacing:.5px}
    .brand .sub{font-size:12px;color:var(--muted)}
    .menu{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .menu a{font-size:14px;color:#243044;padding:8px 10px;border-radius:999px;transition:.25s}
    .menu a:hover{background:#e9f2ff;color:var(--brand)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:999px;padding:12px 18px;font-weight:700;cursor:pointer;transition:.25s;white-space:nowrap}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:var(--shadow-2)}
    .btn-primary:hover{transform:translateY(-2px);filter:saturate(1.06)}
    .btn-ghost{background:#fff;color:var(--text);border:1px solid var(--line)}
    .btn-ghost:hover{border-color:#b8ccf5;transform:translateY(-2px)}
    .burger{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px}
    main{padding-bottom:18px}
    .hero{position:relative;overflow:hidden}
    .hero::before,.hero::after{content:"";position:absolute;border-radius:999px;filter:blur(4px);pointer-events:none}
    .hero::before{width:260px;height:260px;right:-80px;top:40px;background:radial-gradient(circle,rgba(31,111,255,.24),rgba(31,111,255,0) 65%)}
    .hero::after{width:220px;height:220px;left:-60px;bottom:10px;background:radial-gradient(circle,rgba(0,194,255,.18),rgba(0,194,255,0) 68%)}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:stretch;padding:28px 0 16px}
    .hero-card{background:linear-gradient(135deg,rgba(255,255,255,.92),rgba(246,250,255,.96));border:1px solid rgba(220,229,241,.9);border-radius:28px;box-shadow:var(--shadow);padding:30px}
    h1{margin:10px 0 14px;font-size:clamp(32px,5vw,54px);line-height:1.05;letter-spacing:-.03em}
    .lead{font-size:17px;line-height:1.8;color:var(--muted);max-width:60ch}
    .pill-row{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 22px}
    .pill{padding:9px 12px;border-radius:999px;background:#eef5ff;color:#17408b;font-size:13px;font-weight:700;border:1px solid #dce8ff}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}
    .quick-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .stat{background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid var(--line);border-radius:22px;padding:18px;box-shadow:0 8px 24px rgba(16,38,75,.05)}
    .stat b{display:block;font-size:30px;line-height:1;color:var(--brand)}
    .stat span{display:block;margin-top:8px;color:var(--muted);font-size:13px;line-height:1.55}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:clamp(24px,3vw,34px)}
    .section-head p{margin:0;color:var(--muted);max-width:68ch;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:0 10px 24px rgba(16,38,75,.05);transition:.25s}
    .card:hover{transform:translateY(-4px);box-shadow:0 16px 32px rgba(16,38,75,.08)}
    .card h3,.card h4{margin:0 0 10px}
    .muted{color:var(--muted);line-height:1.75}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:8px 12px;border-radius:999px;background:#f0f6ff;border:1px solid #d9e7ff;color:#23427a;font-size:13px}
    .steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .step{position:relative}
    .step-num{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-weight:800;margin-bottom:12px}
    .compare-wrap{overflow:auto;border-radius:20px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f4f8ff}
    .score{font-weight:800;color:#0f5bd6}
    .rating{display:flex;align-items:center;gap:8px;font-weight:800}
    .stars{color:#f6b400;letter-spacing:2px}
    .accordion{display:grid;gap:12px}
    .faq-item{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}
    .faq-q{width:100%;text-align:left;border:0;background:transparent;padding:18px 18px;font-size:16px;font-weight:700;color:var(--text);display:flex;align-items:center;justify-content:space-between;gap:16px;cursor:pointer}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 18px}
    .faq-item.open .faq-a{max-height:200px;padding-bottom:18px}
    .faq-item.open .icon{transform:rotate(45deg)}
    .icon{transition:.25s;color:var(--brand);font-size:22px;line-height:1}
    .review{display:flex;flex-direction:column;gap:12px}
    .avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#e9f2ff,#d3ecff);display:grid;place-items:center;font-weight:800;color:#1a4f9b}
    .review-top{display:flex;align-items:center;gap:12px}
    .review small{color:var(--muted)}
    .gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .gallery .card img{border-radius:16px;width:100%;height:auto}
    .articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .article-meta{font-size:13px;color:var(--muted);margin-bottom:10px}
    .form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-weight:700;font-size:14px}
    input,select,textarea{width:100%;border:1px solid var(--line);border-radius:14px;padding:14px 14px;font:inherit;background:#fff;color:var(--text);outline:none;transition:.2s}
    input:focus,select:focus,textarea:focus{border-color:#8bb4ff;box-shadow:0 0 0 4px rgba(31,111,255,.08)}
    textarea{min-height:130px;resize:vertical}
    .footer-links{display:flex;flex-wrap:wrap;gap:12px}
    footer{padding:18px 0 28px;background:#f0f5fc;border-top:1px solid var(--line);color:#223047}
    footer a{color:#1f5fd5}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
    .contact-box{display:grid;grid-template-columns:120px 1fr;gap:14px;align-items:center}
    .contact-box img{width:120px;height:120px;object-fit:cover;border-radius:16px;border:1px solid var(--line);background:#fff}
    .floating{position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px}
    .fab{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 18px 36px rgba(31,111,255,.22);border:0;cursor:pointer}
    .side-panel{position:fixed;right:16px;bottom:82px;z-index:59;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:14px;display:none;width:min(280px,calc(100vw - 32px))}
    .side-panel.open{display:block}
    .side-panel h4{margin:0 0 10px}
    .kv{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .kv div{padding:12px;border:1px solid var(--line);border-radius:14px;background:#f8fbff}
    .timeline{display:grid;gap:12px}
    .tl{display:grid;grid-template-columns:84px 1fr;gap:14px;align-items:start;padding:14px 0;border-bottom:1px solid var(--line)}
    .tl:last-child{border-bottom:0}
    .tl b{color:var(--brand)}
    .mobile-only{display:none}
    .scroll-top{position:fixed;right:16px;bottom:146px}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.steps,.gallery,.articles,.footer-grid,.form{grid-template-columns:1fr}
      .quick-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
      .menu{display:none;position:absolute;left:16px;right:16px;top:66px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:12px}
      .menu.open{display:flex;flex-direction:column;align-items:flex-start}
      .burger{display:inline-flex}
      .nav{position:relative}
      .mobile-only{display:inline-flex}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container),calc(100% - 22px))}
      .hero-card{padding:22px}
      .quick-stats{grid-template-columns:1fr}
      .tl{grid-template-columns:1fr}
      .contact-box{grid-template-columns:1fr}
    }