:root{
      --bg:#fff8f4;
      --panel:#ffffff;
      --panel-2:#fff1eb;
      --text:#1f2430;
      --muted:#5f6777;
      --line:#ead7ce;
      --brand:#d72b2b;
      --brand-2:#ff5d3a;
      --brand-3:#9f1f1f;
      --shadow:0 18px 40px rgba(162,46,32,.12);
      --radius:22px;
    }
    *{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,#fff8f4 0%,#fffdfb 48%,#fff7f2 100%);color:var(--text)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(1180px,calc(100% - 32px));margin:0 auto}
    header{position:sticky;top:0;z-index:50;background:rgba(255,248,244,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(234,215,206,.7)}
    .topbar{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 .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:4px;box-shadow:0 8px 20px rgba(0,0,0,.05)}
    .brand h1{font-size:18px;line-height:1.1;margin:0;color:#8f1717}
    .brand p{margin:3px 0 0;font-size:12px;color:var(--muted)}
    nav{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    nav a{font-size:14px;color:#313847;padding:8px 0;position:relative}
    nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:linear-gradient(90deg,var(--brand),var(--brand-2));transition:.25s}
    nav a:hover::after{width:100%}
    .nav-actions{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:12px 18px;font-weight:700;cursor:pointer;transition:.25s;line-height:1}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 14px 30px rgba(215,43,43,.24)}
    .btn-primary:hover,.btn-secondary:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(215,43,43,.16)}
    .btn-secondary{background:#fff;color:#b32121;border-color:#efc8bd}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px;color:var(--text)}
    .hero{padding:38px 0 28px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
    .hero-main{background:linear-gradient(135deg,#fff 0%,#fff3ee 52%,#ffe3d9 100%);border:1px solid #f0d8cf;border-radius:28px;padding:32px;box-shadow:var(--shadow);position:relative;overflow:hidden}
    .hero-main::before,.hero-main::after{content:"";position:absolute;border-radius:50%;background:rgba(215,43,43,.08);filter:blur(2px)}
    .hero-main::before{width:220px;height:220px;right:-70px;top:-70px}
    .hero-main::after{width:160px;height:160px;right:130px;bottom:-60px;background:rgba(255,93,58,.12)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid #f0d8cf;color:#a21f1f;padding:8px 14px;border-radius:999px;font-size:13px;font-weight:700}
    .hero h2{font-size:clamp(30px,4vw,52px);line-height:1.08;margin:18px 0 14px;max-width:12em}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:52ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .mini-card{background:rgba(255,255,255,.8);border:1px solid #f0d8cf;border-radius:18px;padding:14px 16px}
    .mini-card strong{display:block;font-size:18px;color:#8f1717}
    .mini-card span{font-size:13px;color:var(--muted)}
    .hero-side{display:grid;gap:16px}
    .side-card{background:var(--panel);border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:var(--shadow)}
    .side-card h3{margin:0 0 10px;font-size:18px}
    .side-card ul{margin:0;padding-left:18px;color:var(--muted);line-height:1.8}
    .stats{padding:10px 0 18px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .stat{background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:0 10px 24px rgba(0,0,0,.04)}
    .stat .num{font-size:30px;font-weight:800;color:var(--brand)}
    .stat .label{margin-top:6px;font-weight:700}
    .stat .desc{margin-top:6px;color:var(--muted);font-size:14px;line-height:1.6}
    section{padding:18px 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:16px}
    .section-head h3{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:62ch;line-height:1.7}
    .section-box{background:rgba(255,255,255,.78);border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:var(--shadow)}
    .cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .feature-card,.case-card,.review-card,.help-card,.article-card,.network-card,.trust-card{background:#fff;border:1px solid #efddd4;border-radius:22px;padding:20px;box-shadow:0 10px 24px rgba(0,0,0,.04);transition:.25s}
    .feature-card:hover,.case-card:hover,.review-card:hover,.help-card:hover,.article-card:hover,.network-card:hover,.trust-card:hover{transform:translateY(-4px);box-shadow:0 18px 32px rgba(169,52,34,.12)}
    .icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#ffe5de,#fff5f2);color:#b11f1f;font-size:22px;margin-bottom:14px}
    .feature-card h4,.case-card h4,.review-card h4,.help-card h4,.article-card h4,.network-card h4{margin:0 0 10px;font-size:18px}
    .muted{color:var(--muted)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:9px 13px;border-radius:999px;background:#fff;border:1px solid #efd8cf;color:#7c2020;font-size:13px}
    .timeline{display:grid;gap:12px}
    .step{display:grid;grid-template-columns:84px 1fr;gap:16px;align-items:start;background:#fff;border:1px solid #efddd4;border-radius:18px;padding:16px}
    .step b{display:inline-flex;align-items:center;justify-content:center;min-height:34px;border-radius:10px;background:#ffe8e1;color:#a31f1f}
    .compare-wrap{overflow:auto;border:1px solid #efddd4;border-radius:20px;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:16px 14px;border-bottom:1px solid #f2e4dd;text-align:left;vertical-align:top}
    th{background:#fff4ef;color:#8d1616}
    tr:last-child td{border-bottom:none}
    .grade{font-size:18px;font-weight:800;color:#8f1717}
    .badge{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;background:#fff2ec;border:1px solid #f0d8cf;color:#a11f1f;font-size:12px;font-weight:700}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .list-check{margin:0;padding-left:18px;line-height:1.85;color:var(--muted)}
    .gallery{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .gallery img{width:100%;border-radius:20px;border:1px solid #efddd4;box-shadow:0 12px 24px rgba(0,0,0,.06)}
    .faq details{background:#fff;border:1px solid #efddd4;border-radius:18px;padding:16px 18px}
    .faq details+details{margin-top:12px}
    .faq summary{cursor:pointer;font-weight:700;color:#262c39;list-style:none}
    .faq summary::-webkit-details-marker{display:none}
    .faq p{margin:12px 0 0;color:var(--muted);line-height:1.8}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .stars{color:#ff8f1f;font-size:18px;letter-spacing:2px}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article-card time{display:block;color:#a4695b;font-size:13px;margin-bottom:10px}
    .pricing{display:grid;grid-template-columns:1.05fr .95fr;gap:16px}
    .price-card{background:linear-gradient(180deg,#fff 0%,#fff4ef 100%);border:1px solid #efddd4;border-radius:24px;padding:22px}
    .price-item{display:flex;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px dashed #edd8d0}
    .price-item:last-child{border-bottom:none}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    input,select,textarea{width:100%;border:1px solid #e7d4ca;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);background:#fff}
    textarea{min-height:120px;resize:vertical}
    label{display:block;font-size:14px;font-weight:700;margin-bottom:8px;color:#3a4151}
    .full{grid-column:1/-1}
    footer{margin-top:8px;background:#8f1717;color:#fff}
    .footer-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:24px;padding:30px 0}
    .footer-grid a{color:#fff}
    .footer-grid .muted{color:rgba(255,255,255,.82)}
    .footer-links{display:flex;flex-wrap:wrap;gap:12px}
    .footer-links a{padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.12)}
    .foot-bottom{border-top:1px solid rgba(255,255,255,.18);padding:14px 0 18px;color:rgba(255,255,255,.84);font-size:14px}
    .float-tools{position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px}
    .float-tools a,.float-tools button{width:48px;height:48px;border:none;border-radius:16px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;display:grid;place-items:center;box-shadow:0 14px 28px rgba(215,43,43,.25);cursor:pointer}
    .float-tools button{font-size:18px}
    .mobile-only{display:none}
    .scroll-reveal{opacity:0;transform:translateY(18px);transition:.6s ease}
    .scroll-reveal.show{opacity:1;transform:none}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.cards-3,.reviews,.articles,.split,.pricing,.footer-grid,.gallery{grid-template-columns:1fr}
      .hero h2{max-width:none}
      nav{display:none}
      nav.open{display:flex;flex-direction:column;align-items:flex-start;gap:10px;padding:12px 0 4px}
      .menu-toggle{display:inline-flex}
      .topbar{align-items:flex-start;flex-wrap:wrap}
      .nav-actions{margin-left:auto}
      .form-grid{grid-template-columns:1fr}
    }
    @media (max-width: 640px){
      .container{width:min(100% - 20px,1180px)}
      .hero-main,.section-box{padding:20px}
      .hero-points{grid-template-columns:1fr}
      .step{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .mobile-only{display:inline-flex}
      .desktop-only{display:none}
    }