:root{
      --orange:#f45b22;
      --orange-dark:#c43d10;
      --coral:#ff8752;
      --ink:#20252a;
      --muted:#687078;
      --line:#eadfd7;
      --paper:#fffaf6;
      --cream:#fff3e9;
      --white:#ffffff;
      --green:#28745c;
      --shadow:0 16px 42px rgba(100,54,25,.10);
      --container:min(1180px,calc(100% - 36px));
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:"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:var(--container);margin:0 auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,250,246,.96);border-bottom:1px solid rgba(234,223,215,.9);backdrop-filter:blur(14px)}
    .nav-bar{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .brand{display:flex;align-items:center;gap:10px;flex:none}
    .ai-page-logo{width:42px}
    .brand-name{font-weight:800;letter-spacing:0;color:var(--ink);font-size:18px}
    .nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap}
    .nav-links a{font-size:13px;color:#50565b;padding:7px 9px;border-radius:5px;transition:.2s ease}
    .nav-links a:hover{color:var(--orange-dark);background:#fff0e6}
    .nav-cta{background:var(--orange)!important;color:#fff!important;margin-left:10px;padding:9px 15px!important}
    .menu-toggle{display:none;border:0;background:transparent;color:var(--ink);font-size:24px;cursor:pointer}
    .hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#fff8f2 0%,#ffe6d3 52%,#ffd0b0 100%);padding:84px 0 72px}
    .hero:after{content:"";position:absolute;right:-120px;top:-110px;width:420px;height:420px;border:70px solid rgba(244,91,34,.15);border-radius:50%}
    .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:58px;align-items:center}
    .eyebrow{display:inline-flex;align-items:center;color:var(--orange-dark);font-size:13px;font-weight:800;letter-spacing:1px;margin-bottom:16px}
    .eyebrow:before{content:"";width:30px;height:3px;background:var(--orange);margin-right:10px}
    h1,h2,h3{line-height:1.2;letter-spacing:0;margin:0}
    h1{font-size:clamp(38px,5vw,68px);max-width:700px}
    .hero-copy{font-size:18px;color:#4f5050;max-width:650px;margin:22px 0 28px}
    .actions{display:flex;gap:12px;flex-wrap:wrap}
    .button{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--orange);background:var(--orange);color:#fff;padding:12px 20px;border-radius:5px;font-weight:700;transition:.2s ease}
    .button:hover{transform:translateY(-2px);box-shadow:0 8px 18px rgba(196,61,16,.22)}
    .button.secondary{background:transparent;color:var(--orange-dark)}
    .hero-panel{background:rgba(255,255,255,.72);border:1px solid rgba(255,255,255,.85);padding:26px;box-shadow:var(--shadow);position:relative}
    .panel-title{font-size:14px;color:var(--orange-dark);font-weight:800;margin-bottom:18px}
    .metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .metric{padding:16px;background:#fff;border-left:3px solid var(--orange)}
    .metric strong{display:block;font-size:27px;color:var(--ink)}
    .metric span{font-size:12px;color:var(--muted)}
    .section{padding:82px 0}
    .section.alt{background:#fff3e9}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:28px;margin-bottom:32px}
    .section-head h2{font-size:clamp(27px,3.3vw,43px)}
    .section-head p{max-width:560px;color:var(--muted);margin:0}
    .intro-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:42px;align-items:start}
    .lead{font-size:21px;font-weight:700;color:var(--orange-dark);margin-top:0}
    .intro-grid p{color:var(--muted)}
    .feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line)}
    .feature-list div{background:var(--white);padding:22px}
    .feature-list strong{display:block;margin-bottom:5px}
    .feature-list span{font-size:14px;color:var(--muted)}
    .service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .service{background:#fff;border:1px solid var(--line);padding:22px;min-height:190px;transition:.25s ease}
    .service:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#f5b18e}
    .service-mark{width:34px;height:34px;display:grid;place-items:center;background:var(--orange);color:#fff;font-weight:800;margin-bottom:18px}
    .service h3{font-size:18px;margin-bottom:8px}
    .service p{font-size:14px;color:var(--muted);margin:0}
    .workflow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:2px solid var(--orange)}
    .step{padding:24px 18px 8px;border-right:1px solid var(--line);position:relative}
    .step:last-child{border-right:0}
    .step-no{font-size:13px;color:var(--orange-dark);font-weight:800}
    .step h3{font-size:17px;margin:10px 0 7px}
    .step p{font-size:14px;color:var(--muted);margin:0}
    .solution-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .solution{padding:23px;background:#fff;border:1px solid var(--line)}
    .solution h3{font-size:19px;margin-bottom:8px}
    .solution p{color:var(--muted);font-size:14px;margin:0}
    .network{display:flex;flex-wrap:wrap;gap:10px;padding:26px;background:#fff;border:1px solid var(--line)}
    .tag{border:1px solid #edc9b6;color:#78432c;background:#fff8f3;padding:8px 13px;font-size:14px}
    .comparison{display:grid;grid-template-columns:.75fr 1.25fr;gap:26px;align-items:start}
    .score-box{background:var(--orange);color:#fff;padding:30px}
    .score-box small{display:block;opacity:.85}
    .score{font-size:62px;font-weight:800;line-height:1;margin:12px 0}
    .stars{letter-spacing:4px;font-size:20px}
    .table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line)}
    table{width:100%;border-collapse:collapse;min-width:620px}
    th,td{text-align:left;padding:15px 17px;border-bottom:1px solid var(--line);font-size:14px}
    th{background:#fff0e5;color:var(--orange-dark)}
    tr:last-child td{border-bottom:0}
    td:nth-child(2){font-weight:700;color:var(--orange-dark)}
    .pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .price-item{border:1px solid var(--line);padding:22px;background:#fff}
    .price-item strong{font-size:20px;display:block;margin-bottom:8px}
    .price-item p{font-size:14px;color:var(--muted);margin:0}
    .case-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:16px}
    .case{background:#fff;border:1px solid var(--line);overflow:hidden}
    .case img{width:100%;aspect-ratio:16/9;object-fit:cover}
    .case.square img{aspect-ratio:1/1}
    .case-body{padding:18px}
    .case-body h3{font-size:18px;margin-bottom:7px}
    .case-body p{color:var(--muted);font-size:14px;margin:0}
    .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review{background:#fff;border-top:3px solid var(--orange);padding:22px}
    .review p{margin:0 0 16px;color:#4f555a;font-size:15px}
    .review strong{font-size:14px}
    .review span{display:block;font-size:12px;color:var(--muted)}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 30px}
    details{background:#fff;border:1px solid var(--line);padding:16px 18px}
    summary{cursor:pointer;font-weight:700;padding-right:20px}
    details p{color:var(--muted);font-size:14px;margin:12px 0 0}
    .article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article{border-bottom:2px solid var(--orange);padding:20px;background:#fff}
    .article span{color:var(--orange-dark);font-size:12px;font-weight:700}
    .article h3{font-size:18px;margin:10px 0}
    .article p{font-size:14px;color:var(--muted);margin:0}
    .contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:38px;align-items:start}
    .contact-note{background:#26292b;color:#fff;padding:30px}
    .contact-note h2{font-size:34px;margin-bottom:14px}
    .contact-note p{color:#d7d7d7}
    .contact-line{border-top:1px solid #4a4d4e;padding:13px 0;font-size:14px}
    form{background:#fff;border:1px solid var(--line);padding:28px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
    label{font-size:13px;font-weight:700;color:#454a4e}
    input,select,textarea{display:block;width:100%;border:1px solid #d8d2cc;background:#fffaf7;padding:12px 13px;margin-top:6px;font:inherit;color:var(--ink);border-radius:3px}
    textarea{min-height:120px;resize:vertical}
    .full{grid-column:1/-1}
    form button{cursor:pointer;border:0;font:inherit}
    .footer{background:#272a2c;color:#eee;padding:48px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:32px}
    .footer h3{font-size:16px;color:#fff;margin-bottom:13px}
    .footer p,.footer a{color:#c9c9c9;font-size:13px}
    .footer a{display:block;margin:5px 0}
    .footer a:hover{color:#ffb08c}
    .footer-bottom{border-top:1px solid #45484a;margin-top:30px;padding-top:18px;color:#aeb0b1;font-size:12px}
    .qr{width:118px;background:#fff;padding:6px;margin-top:10px}
    .float-help{position:fixed;right:20px;bottom:22px;z-index:15;background:var(--orange);color:#fff;padding:12px 16px;border-radius:4px;box-shadow:0 8px 22px rgba(196,61,16,.28);font-weight:700;font-size:14px}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
    .reveal.visible{opacity:1;transform:none}
    @media(max-width:980px){
      .nav-links{display:none;position:absolute;left:18px;right:18px;top:74px;background:#fffaf6;border:1px solid var(--line);padding:10px;box-shadow:var(--shadow)}
      .nav-links.open{display:flex;flex-direction:column;align-items:stretch}
      .nav-links a{padding:10px}
      .nav-cta{margin-left:0}
      .menu-toggle{display:block}
      .hero-grid,.intro-grid,.comparison,.contact-grid{grid-template-columns:1fr}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .workflow{grid-template-columns:repeat(3,1fr);border-top:0;gap:12px}
      .step{border:1px solid var(--line);background:#fff}
      .case-grid{grid-template-columns:1fr 1fr}
    }
    @media(max-width:620px){
      :root{--container:calc(100% - 28px)}
      .hero{padding:62px 0 55px}
      h1{font-size:39px}
      .section{padding:58px 0}
      .section-head{display:block}
      .section-head p{margin-top:14px}
      .service-grid,.solution-grid,.pricing,.review-grid,.faq-grid,.article-grid,.footer-grid,.case-grid{grid-template-columns:1fr}
      .workflow{grid-template-columns:1fr}
      .feature-list{grid-template-columns:1fr}
      form{grid-template-columns:1fr;padding:20px}
      .full{grid-column:auto}
      .metric-grid{grid-template-columns:1fr 1fr}
      .float-help{right:12px;bottom:12px}
    }