:root{
      --bg:#f7f8fc;--panel:#ffffff;--soft:#eef2ff;--soft2:#fff3e8;--text:#132033;--muted:#5f6b81;--line:#dfe5f2;
      --brand:#2457ff;--brand2:#ff5d3f;--brand3:#14b8a6;--shadow:0 18px 40px rgba(28,45,90,.10);
      --radius:20px;--radius2:28px;--max:1180px;
    }
    *{box-sizing:border-box} html{scroll-behavior:smooth}
    body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:linear-gradient(180deg,#f7f8fc 0%,#fdfefe 50%,#f6f8ff 100%);color:var(--text);line-height:1.65}
    a{color:inherit;text-decoration:none} img{display:block;max-width:100%}
    .container{width:min(var(--max),calc(100% - 32px));margin:0 auto}
    header{position:sticky;top:0;z-index:50;background:rgba(247,248,252,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(223,229,242,.8)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand img{width:44px;height:44px;object-fit:contain;background:#fff;border:1px solid var(--line);border-radius:14px;padding:6px}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted)}
    .navlinks{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .navlinks a{font-size:14px;color:var(--muted);padding:8px 10px;border-radius:999px;transition:.25s}
    .navlinks a:hover{background:var(--soft);color:var(--text)}
    .navcta{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:999px;padding:11px 16px;font-weight:700;cursor:pointer;transition:.25s;white-space:nowrap}
    .btn-primary{background:linear-gradient(135deg,var(--brand) 0%,#5d7cff 100%);color:#fff;box-shadow:0 14px 28px rgba(36,87,255,.24)}
    .btn-primary:hover{transform:translateY(-1px)}
    .btn-ghost{background:#fff;color:var(--text);border-color:var(--line)}
    .menu{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px}
    main{padding:18px 0 0}
    section{padding:30px 0}
    .hero{padding-top:24px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch}
    .hero-card{background:linear-gradient(135deg,#1636a3 0%,#2457ff 45%,#ff5d3f 100%);color:#fff;border-radius:30px;padding:34px;position:relative;overflow:hidden;box-shadow:var(--shadow)}
    .hero-card:before,.hero-card:after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.12);filter:blur(2px)}
    .hero-card:before{width:240px;height:240px;right:-70px;top:-70px}
    .hero-card:after{width:180px;height:180px;right:110px;bottom:-80px}
    .kicker{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.18);padding:7px 12px;border-radius:999px;font-size:13px}
    h1{font-size:clamp(32px,5vw,54px);line-height:1.08;margin:16px 0 14px}
    .hero p{margin:0;color:rgba(255,255,255,.92);max-width:58ch;font-size:16px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .mini-stat{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.16);border-radius:18px;padding:14px}
    .mini-stat strong{display:block;font-size:22px}
    .mini-stat span{font-size:12px;color:rgba(255,255,255,.82)}
    .side-stack{display:grid;gap:16px}
    .side-card{background:#fff;border:1px solid var(--line);border-radius:26px;padding:22px;box-shadow:var(--shadow)}
    .side-card h3{margin:0 0 10px;font-size:18px}
    .tagcloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 12px;border-radius:999px;background:linear-gradient(180deg,#fff,#f4f7ff);border:1px solid var(--line);font-size:13px;color:var(--text)}
    .metric-grid,.service-grid,.case-grid,.review-grid,.article-grid,.network-grid,.price-grid,.help-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .card{background:var(--panel);border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:0 10px 24px rgba(24,35,58,.05);transition:.25s}
    .card:hover{transform:translateY(-3px);box-shadow:0 18px 34px rgba(24,35,58,.09)}
    .card h3,.card h4{margin:0 0 10px}
    .muted{color:var(--muted)}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:72ch}
    .workflow,.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .step{position:relative}
    .step .num{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#fff2e8,#e8f0ff);color:var(--brand2);font-weight:800;margin-bottom:12px;border:1px solid var(--line)}
    .compare-wrap{overflow:auto;border:1px solid var(--line);border-radius:24px;background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:16px 18px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
    th{background:#f8faff;font-size:14px}
    .badge{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;background:var(--soft);color:var(--brand);font-size:12px;font-weight:700}
    .faq{display:grid;gap:12px}
    .faq-item{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}
    .faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:16px 18px;background:transparent;border:0;font:inherit;color:var(--text);cursor:pointer;text-align:left}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 18px}
    .faq-item.open .faq-a{max-height:180px;padding-bottom:16px}
    .reviews .card{background:linear-gradient(180deg,#fff,#fbfcff)}
    .stars{color:#ffb400;font-size:18px;letter-spacing:2px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    input,select,textarea{width:100%;padding:13px 14px;border-radius:14px;border:1px solid var(--line);background:#fff;color:var(--text);font:inherit;outline:none}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#8aa2ff;box-shadow:0 0 0 4px rgba(36,87,255,.08)}
    .form-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:8px}
    .split{display:grid;grid-template-columns:1.05fr .95fr;gap:18px;align-items:start}
    .cover{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .cover img,.square img{width:100%;height:auto;border-radius:18px;border:1px solid var(--line);object-fit:cover;box-shadow:0 12px 24px rgba(22,34,60,.08)}
    .articles a{display:block;padding:16px 18px;border-radius:18px;border:1px solid var(--line);background:#fff}
    .articles a:hover{background:#f8faff}
    .footer{padding:26px 0 34px;border-top:1px solid var(--line);background:#fff;color:var(--text)}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:18px}
    .footer a{color:var(--text)}
    .float{position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px}
    .float a,.float button{width:52px;height:52px;border-radius:18px;border:0;background:linear-gradient(135deg,var(--brand),#6d86ff);color:#fff;display:grid;place-items:center;box-shadow:var(--shadow);cursor:pointer}
    .float .wx{background:linear-gradient(135deg,var(--brand3),#3dd6c7)}
    .topbtn{opacity:0;pointer-events:none;transform:translateY(6px);transition:.25s}
    .topbtn.show{opacity:1;pointer-events:auto;transform:none}
    .mobile-only{display:none}
    .bar{height:10px;border-radius:999px;background:#edf2ff;overflow:hidden}
    .bar span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--brand),#6b8cff)}
    .list{padding-left:18px;margin:0;color:var(--muted)}
    .list li{margin:8px 0}
    .accent{color:var(--brand2);font-weight:700}
    .center{text-align:center}
    .floating-note{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .subtle{font-size:13px;color:rgba(255,255,255,.84)}
    @media (max-width: 1024px){
      .hero-grid,.split,.footer-grid,.metric-grid,.service-grid,.case-grid,.review-grid,.article-grid,.network-grid,.price-grid,.help-grid,.workflow,.timeline{grid-template-columns:1fr 1fr}
      .side-stack{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 760px){
      .navlinks,.navcta{display:none}
      .menu,.mobile-only{display:inline-flex}
      .hero-grid,.split,.footer-grid,.metric-grid,.service-grid,.case-grid,.review-grid,.article-grid,.network-grid,.price-grid,.help-grid,.workflow,.timeline,.form-grid,.side-stack,.cover{grid-template-columns:1fr}
      .hero-card{padding:24px;border-radius:24px}
      .hero-meta{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:start}
      table{min-width:760px}
      section{padding:22px 0}
    }
    .reveal{opacity:0;transform:translateY(16px);transition:.6s ease}
    .reveal.show{opacity:1;transform:none}