:root{
      --ink:#172033;
      --muted:#667085;
      --paper:#fffaf4;
      --white:#ffffff;
      --line:#eadfd4;
      --red:#ee4d39;
      --orange:#ff9f1c;
      --blue:#2764d8;
      --teal:#0d9488;
      --yellow:#ffd447;
      --soft:#f6eee6;
      --shadow:0 16px 40px rgba(41,34,28,.09);
      --radius:8px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;height:auto;display:block}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .topbar{background:var(--ink);color:#fff;font-size:13px}
    .topbar .container{display:flex;justify-content:space-between;gap:16px;padding:9px 0}
    header{position:sticky;top:0;z-index:20;background:rgba(255,250,244,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
    .nav-wrap{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
    .ai-page-logo{width:132px}
    .brand-name{font-weight:800;letter-spacing:.02em}
    .nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;padding:9px 11px;color:#414a5a;transition:.2s}
    .nav-links a:hover{color:var(--red)}
    .nav-cta,.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:5px;padding:12px 19px;font-weight:700;cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s}
    .nav-cta,.btn-primary{background:var(--red);color:#fff;box-shadow:0 8px 18px rgba(238,77,57,.22)}
    .nav-cta:hover,.btn:hover{transform:translateY(-2px);box-shadow:0 12px 24px rgba(38,42,55,.14)}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;padding:8px 11px;border-radius:5px;font-size:20px}
    .hero{position:relative;overflow:hidden;background:#ffd447;padding:82px 0 68px}
    .hero:before,.hero:after{content:"";position:absolute;display:block;transform:rotate(14deg);pointer-events:none}
    .hero:before{width:260px;height:260px;right:-90px;top:-80px;background:var(--red)}
    .hero:after{width:140px;height:140px;left:-55px;bottom:-42px;background:var(--blue)}
    .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.12fr) minmax(320px,.88fr);gap:58px;align-items:center}
    .eyebrow,.section-kicker{font-size:12px;font-weight:800;letter-spacing:.16em;text-transform:uppercase;color:var(--red)}
    .hero .eyebrow{color:var(--ink)}
    h1{font-size:clamp(38px,5vw,68px);line-height:1.08;letter-spacing:-.03em;margin:14px 0 22px;max-width:690px}
    .hero-copy{font-size:18px;max-width:620px;color:#3e3b39}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
    .btn-dark{background:var(--ink);color:#fff}
    .hero-panel{background:#fff;border:2px solid var(--ink);padding:26px;box-shadow:10px 10px 0 var(--blue)}
    .hero-panel h2{font-size:22px;margin:0 0 16px}
    .hero-panel ul{padding:0;margin:0;list-style:none}
    .hero-panel li{display:flex;gap:10px;align-items:flex-start;padding:12px 0;border-top:1px solid var(--line)}
    .hero-panel li:before{content:"+";font-weight:900;color:var(--red);font-size:22px;line-height:1}
    section{padding:86px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:34px}
    h2{font-size:clamp(28px,4vw,45px);line-height:1.15;margin:8px 0 0;letter-spacing:-.025em}
    h3{line-height:1.3;margin:0 0 10px}
    .section-intro{max-width:570px;color:var(--muted);margin:0}
    .stats{background:var(--ink);color:#fff;padding:28px 0}
    .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:#445064}
    .stat{background:var(--ink);padding:20px 24px}
    .stat strong{font-size:32px;display:block;color:var(--yellow)}
    .stat span{font-size:14px;color:#d4d9e2}
    .about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:start}
    .lead{font-size:20px;line-height:1.65;margin:0 0 20px}
    .about-note{border-left:5px solid var(--red);padding:7px 0 7px 20px;color:#4e596b}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}
    .tag{background:#fff;border:1px solid var(--line);padding:7px 12px;border-radius:3px;font-size:13px}
    .service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .service-card{background:#fff;border:1px solid var(--line);padding:24px;min-height:190px;transition:.25s}
    .service-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:var(--orange)}
    .service-card .num{font-size:13px;color:var(--red);font-weight:800}
    .service-card p,.feature p,.review p,.case p{color:var(--muted);font-size:14px;margin:0}
    .band{background:#f5e9de}
    .workflow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:2px solid var(--ink)}
    .step{padding:22px 18px 10px;border-right:1px solid #d8c8b9}
    .step:last-child{border-right:0}
    .step b{display:block;color:var(--red);font-size:14px;margin-bottom:14px}
    .step h3{font-size:17px}
    .feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .feature{background:#fff;padding:24px;border-top:4px solid var(--blue);box-shadow:0 8px 20px rgba(42,45,54,.05)}
    .feature:nth-child(2){border-color:var(--red)} .feature:nth-child(3){border-color:var(--teal)} .feature:nth-child(4){border-color:var(--orange)}
    .feature strong{font-size:26px;display:block;margin-bottom:8px}
    .case-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
    .case{background:#fff;padding:14px;border:1px solid var(--line)}
    .case img{width:100%;aspect-ratio:16/9;object-fit:cover;margin-bottom:18px}
    .case-content{padding:0 10px 12px}
    .case-side{display:grid;gap:18px}
    .case-side .case img{aspect-ratio:4/3}
    .comparison{background:var(--ink);color:#fff}
    .comparison .section-kicker{color:var(--yellow)}
    .comparison .section-intro{color:#c8d0dc}
    .score-box{display:flex;align-items:center;gap:24px;background:var(--red);padding:19px 24px;color:#fff;margin-bottom:24px}
    .score-box strong{font-size:42px;line-height:1}
    .stars{color:var(--yellow);letter-spacing:4px}
    .table-wrap{overflow-x:auto;background:#fff;color:var(--ink)}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{text-align:left;padding:16px 18px;border-bottom:1px solid var(--line);font-size:14px}
    th{background:#f6eee6}
    td:first-child{font-weight:700}
    .yes{color:var(--teal);font-weight:800}
    .network-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
    .network-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:20px}
    .network-list span{background:#fff;padding:12px 14px;border-left:3px solid var(--orange);font-size:14px}
    .timeline{border-left:2px solid var(--red);padding-left:25px}
    .timeline-item{position:relative;margin-bottom:25px}
    .timeline-item:before{content:"";position:absolute;left:-33px;top:8px;width:13px;height:13px;background:var(--yellow);border:2px solid var(--red);border-radius:50%}
    .timeline-item strong{display:block}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review{background:#fff;padding:23px;border-bottom:4px solid var(--orange)}
    .review-head{display:flex;justify-content:space-between;gap:12px;margin-bottom:13px}
    .review small{color:var(--red);font-weight:700}
    .article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article{background:#fff;padding:24px;border:1px solid var(--line)}
    .article time{color:var(--red);font-size:12px;font-weight:700}
    .article p{color:var(--muted);font-size:14px}
    .article a{font-weight:700;color:var(--blue)}
    .match-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start}
    .match-points{display:grid;gap:12px;margin-top:24px}
    .match-points div{background:#fff;padding:14px 16px;border-left:4px solid var(--teal)}
    form{background:#fff;padding:28px;border:1px solid var(--line);box-shadow:var(--shadow)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
    label{display:grid;gap:7px;font-size:13px;font-weight:700}
    input,select,textarea{width:100%;border:1px solid #d8dce3;padding:12px 13px;border-radius:3px;font:inherit;color:var(--ink);background:#fff}
    textarea{min-height:125px;resize:vertical}
    .full{grid-column:1/-1}
    .faq-list{display:grid;gap:10px;max-width:900px;margin:0 auto}
    details{background:#fff;border:1px solid var(--line);padding:0 20px}
    summary{cursor:pointer;list-style:none;padding:18px 0;font-weight:700;display:flex;justify-content:space-between;gap:16px}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";color:var(--red);font-size:22px;line-height:1}
    details[open] summary:after{content:"−"}
    details p{color:var(--muted);margin:0 0 18px;padding-right:30px}
    .footer-cta{background:var(--red);color:#fff}
    .footer-cta .container{display:flex;justify-content:space-between;align-items:center;gap:25px}
    .footer-cta h2{font-size:34px}
    footer{background:var(--ink);color:#fff;padding:48px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;gap:30px}
    footer h3{font-size:16px;color:var(--yellow)}
    footer p,footer li,footer a{color:#c7ced9;font-size:13px}
    footer ul{list-style:none;padding:0;margin:0;display:grid;gap:6px}
    .qr{width:112px;background:#fff;padding:6px}
    .copyright{border-top:1px solid #3a4558;margin-top:32px;padding-top:18px;color:#9ba5b5;font-size:12px;display:flex;justify-content:space-between;gap:14px}
    .float-tools{position:fixed;right:20px;bottom:22px;z-index:15;display:grid;gap:8px}
    .float-tools a{width:46px;height:46px;background:var(--red);color:#fff;display:grid;place-items:center;border-radius:50%;box-shadow:0 7px 18px rgba(0,0,0,.18);font-weight:800}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s ease}
    .reveal.visible{opacity:1;transform:none}
    @media(max-width:980px){
      .nav-links{display:none;position:absolute;left:20px;right:20px;top:76px;background:var(--paper);border:1px solid var(--line);padding:10px;box-shadow:var(--shadow);justify-content:flex-start}
      .nav-links.open{display:grid;grid-template-columns:repeat(2,1fr)}
      .nav-links a{padding:12px}
      .menu-toggle{display:block}
      .hero-grid,.about-grid,.match-grid{grid-template-columns:1fr}
      .hero-panel{max-width:620px}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .feature-grid{grid-template-columns:repeat(2,1fr)}
      .workflow{grid-template-columns:repeat(3,1fr);row-gap:20px}
      .reviews{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:620px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{display:block;text-align:center}
      .topbar .container span:last-child{display:none}
      .nav-wrap{min-height:68px}
      .nav-links{top:68px;left:14px;right:14px}
      .ai-page-logo{width:112px}
      .brand-name{font-size:13px}
      .hero{padding:60px 0 52px}
      h1{font-size:40px}
      .hero-copy{font-size:16px}
      section{padding:60px 0}
      .section-head{display:block}
      .section-intro{margin-top:14px}
      .stats-grid{grid-template-columns:repeat(2,1fr)}
      .stat{padding:16px}
      .stat strong{font-size:27px}
      .service-grid,.feature-grid,.reviews,.article-grid,.footer-grid{grid-template-columns:1fr}
      .workflow{grid-template-columns:1fr 1fr}
      .step{border-right:0;border-bottom:1px solid #d8c8b9}
      .network-grid{grid-template-columns:1fr}
      .network-list{grid-template-columns:1fr}
      .case-grid{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
      .full{grid-column:auto}
      .footer-cta .container{display:block}
      .footer-cta .btn{margin-top:18px}
      .copyright{display:block}
      .copyright span{display:block;margin-top:8px}
    }