:root{--ink:#172b27;--muted:#58706a;--paper:#f7faf8;--white:#fff;--green:#087c62;--lime:#d8f26b;--line:#dce8e2;--blue:#236c9b;--coral:#ff795f;--shadow:0 14px 36px rgba(24,65,51,.09);--container:1160px}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth;scroll-padding-top:82px}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;line-height:1.65}
    a{color:inherit}
    img{max-width:100%;height:auto}
    .container{width:min(var(--container),calc(100% - 40px));margin-inline:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(247,250,248,.94);border-bottom:1px solid rgba(220,232,226,.85);backdrop-filter:blur(12px)}
    .nav-row{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:22px}
    .brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;white-space:nowrap}
    .ai-page-logo{display:block;width:38px;height:auto}
    .nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap}
    .nav-links a{padding:8px 10px;color:#405a53;text-decoration:none;font-size:13px;white-space:nowrap;border-radius:6px;transition:background .2s,color .2s}
    .nav-links a:hover{background:#e8f2eb;color:var(--green)}
    .nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border:0;border-radius:6px;background:var(--green);color:#fff;text-decoration:none;font-weight:750;transition:transform .2s,box-shadow .2s,background .2s}
    .nav-cta:hover,.button:hover{transform:translateY(-2px);background:#05664f;box-shadow:0 8px 18px rgba(8,124,98,.2)}
    .menu-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--ink);font-size:21px}
    .hero{position:relative;overflow:hidden;background:#e9f4ee;border-bottom:1px solid var(--line)}
    .hero::before{content:"";position:absolute;inset:0;background:linear-gradient(115deg,transparent 0 63%,rgba(216,242,107,.42) 63% 78%,transparent 78%),linear-gradient(180deg,rgba(255,255,255,.4),transparent 70%);pointer-events:none}
    .hero-inner{position:relative;display:grid;grid-template-columns:minmax(0,1.3fr) minmax(250px,.7fr);gap:48px;align-items:center;padding-block:74px 64px}
    .eyebrow{margin:0 0 16px;color:var(--green);font-size:13px;font-weight:800;letter-spacing:1px;text-transform:uppercase}
    h1{max-width:730px;margin:0;font-size:clamp(38px,5vw,62px);line-height:1.12;letter-spacing:0}
    .hero-copy{max-width:670px;margin:22px 0 28px;color:#425d55;font-size:17px}
    .hero-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
    .button-secondary{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border:1px solid #a9c3b5;border-radius:6px;color:#23463b;text-decoration:none;font-weight:700;background:rgba(255,255,255,.55);transition:background .2s,transform .2s}
    .button-secondary:hover{background:#fff;transform:translateY(-2px)}
    .hero-note{margin:18px 0 0;color:#58706a;font-size:13px}
    .hero-panel{padding:25px;background:#fff;border:1px solid #d3e4d9;border-radius:8px;box-shadow:var(--shadow)}
    .hero-panel h2{margin:0 0 16px;font-size:16px}
    .model-chips{display:flex;flex-wrap:wrap;gap:8px}
    .model-chips span{padding:6px 9px;border:1px solid #dce8e2;border-radius:4px;color:#36584d;font-size:12px;background:#f8fbf8}
    .hero-panel p{margin:18px 0 0;color:var(--muted);font-size:13px}
    .metrics{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:0;padding-block:20px}
    .metric{padding:6px 22px;border-left:1px solid var(--line)}
    .metric:first-child{border-left:0;padding-left:0}
    .metric strong{display:block;font-size:19px;color:#173e32}
    .metric span{color:var(--muted);font-size:13px}
    main section{padding-block:72px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:28px;margin-bottom:30px}
    .section-head h2{margin:0;font-size:clamp(27px,3vw,38px);line-height:1.2;letter-spacing:0}
    .section-head p{max-width:560px;margin:0;color:var(--muted)}
    .intro-band{border-bottom:1px solid var(--line)}
    .intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:start}
    .intro-grid h2{margin:0 0 16px;font-size:32px;line-height:1.25}
    .intro-grid p{margin:0 0 14px;color:var(--muted)}
    .capability-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0 22px;margin:0;padding:0;list-style:none;border-top:1px solid var(--line)}
    .capability-list li{padding:14px 2px;border-bottom:1px solid var(--line);font-size:14px}
    .capability-list b{color:var(--green)}
    .services{background:#f0f6f2}
    .service-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
    .service-item{padding:18px 17px;background:#fff;border:1px solid var(--line);border-radius:6px;transition:transform .2s,border-color .2s,box-shadow .2s}
    .service-item:hover{transform:translateY(-3px);border-color:#9dc8b3;box-shadow:0 10px 22px rgba(24,65,51,.07)}
    .service-item h3{margin:0 0 7px;font-size:15px}
    .service-item p{margin:0;color:var(--muted);font-size:13px}
    .service-item.featured{background:#e0f1e8;border-color:#b8d7c5}
    .feature-strip{display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:0;margin-top:22px;border:1px solid #d2e3d9;border-radius:6px;background:#fff;overflow:hidden}
    .feature-strip div{padding:20px;border-left:1px solid var(--line)}
    .feature-strip div:first-child{border-left:0}
    .feature-strip strong{display:block;margin-bottom:5px}
    .feature-strip span{color:var(--muted);font-size:13px}
    .workflow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
    .step{position:relative;padding-top:18px;border-top:2px solid #a7cbbb}
    .step::before{counter-increment:step;content:"0" counter(step);display:block;margin-bottom:12px;color:var(--green);font-size:13px;font-weight:800}
    .step h3{margin:0 0 7px;font-size:16px}
    .step p{margin:0;color:var(--muted);font-size:14px}
    .industry{background:#f0f6f2}
    .industry-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:start}
    .industry-copy h3{margin:0 0 12px;font-size:21px}
    .industry-copy p{margin:0 0 14px;color:var(--muted)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:9px}
    .tag-cloud span{padding:8px 12px;border:1px solid #cddfd4;border-radius:4px;background:#fff;color:#355a4c;font-size:13px}
    .service-network{padding:24px;border-left:4px solid var(--lime);background:#fff}
    .service-network h3{margin:0 0 10px}
    .service-network p{margin:0;color:var(--muted);font-size:14px}
    .case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .case{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:6px}
    .case .media{aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;overflow:hidden;background:#edf3ef}
    .case .media img{display:block;width:100%;height:100%;object-fit:cover}
    .case-copy{padding:17px}
    .case-copy span{color:var(--green);font-size:12px;font-weight:750}
    .case-copy h3{margin:5px 0 7px;font-size:17px}
    .case-copy p{margin:0;color:var(--muted);font-size:13px}
    .comparison{background:#eaf3ee}
    .review-score{display:flex;align-items:center;gap:18px;padding:18px 20px;margin-bottom:20px;background:#fff;border-left:4px solid var(--green)}
    .review-score strong{font-size:34px;line-height:1;color:var(--green)}
    .stars{color:#bd7a00;letter-spacing:2px}
    .review-score p{margin:0;color:var(--muted);font-size:13px}
    .table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:6px}
    table{width:100%;border-collapse:collapse;min-width:690px}
    th,td{padding:14px 16px;border-bottom:1px solid #e6eee9;text-align:left;font-size:14px}
    th{background:#f4f8f5;color:#36564b;font-size:13px}
    td:first-child{font-weight:700}
    .good{color:#087c62;font-weight:750}
    .caution{color:#75847d}
    .pricing-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center}
    .pricing-grid h2{margin:0 0 12px;font-size:31px}
    .pricing-grid p{margin:0;color:var(--muted)}
    .price-note{padding:20px;border:1px solid var(--line);background:#fff;border-radius:6px}
    .price-note strong{display:block;margin-bottom:6px}
    .price-note p{font-size:13px}
    .reviews{background:#f0f6f2}
    .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}
    .review{padding:20px;background:#fff;border-top:3px solid #b5d7c3}
    .review blockquote{margin:0 0 16px;color:#405a53;font-size:14px}
    .review cite{font-style:normal;font-size:13px;font-weight:750}
    .review cite span{display:block;color:var(--muted);font-weight:400}
    .faq-list{border-top:1px solid var(--line)}
    details{border-bottom:1px solid var(--line)}
    summary{position:relative;padding:17px 36px 17px 0;cursor:pointer;list-style:none;font-weight:700}
    summary::-webkit-details-marker{display:none}
    summary::after{content:"+";position:absolute;right:4px;top:13px;color:var(--green);font-size:22px;font-weight:400}
    details[open] summary::after{content:"−"}
    details p{max-width:850px;margin:0;padding:0 36px 17px 0;color:var(--muted);font-size:14px}
    .articles{background:#f0f6f2}
    .article-list{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
    .article-list a{min-height:106px;display:flex;flex-direction:column;justify-content:space-between;padding:16px;background:#fff;border:1px solid var(--line);text-decoration:none;font-size:14px;font-weight:700;transition:border-color .2s,transform .2s}
    .article-list a:hover{transform:translateY(-2px);border-color:#9dc8b3}
    .article-list span{color:var(--green);font-size:12px;font-weight:600}
    .contact{background:#e4f0e9}
    .contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:46px;align-items:start}
    .contact-copy h2{margin:0 0 13px;font-size:34px}
    .contact-copy>p{margin:0 0 20px;color:var(--muted)}
    .contact-lines{display:grid;gap:8px;color:#35584c;font-size:14px}
    .qr{width:142px;margin-top:20px;padding:7px;background:#fff;border:1px solid var(--line)}
    .qr img{display:block;width:100%;height:auto}
    .contact-form{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding:22px;background:#fff;border:1px solid #d3e2d8;border-radius:6px}
    .field{display:grid;gap:6px}
    .field.full{grid-column:1/-1}
    label{font-size:13px;font-weight:700}
    input,select,textarea{width:100%;min-height:44px;padding:10px 12px;border:1px solid #cddbd2;border-radius:4px;background:#fff;color:var(--ink);font:inherit}
    textarea{min-height:112px;resize:vertical}
    input:focus,select:focus,textarea:focus{outline:2px solid #84c8a7;outline-offset:1px}
    .form-submit{grid-column:1/-1;justify-self:start;cursor:pointer;font:inherit}
    .join-band{padding-block:30px;background:#d9ef68}
    .join-row{display:flex;align-items:center;justify-content:space-between;gap:20px}
    .join-row h2{margin:0;font-size:23px}
    .join-row p{margin:3px 0 0;color:#435832;font-size:14px}
    .join-row .button{background:#173b31}
    .site-footer{background:#e8f0eb;color:#26453a;border-top:1px solid #d0dfd5}
    .footer-top{display:flex;justify-content:space-between;align-items:start;gap:30px;padding-block:25px}
    .footer-links{display:flex;flex-wrap:wrap;gap:8px 16px}
    .footer-links a{color:#355c4c;text-decoration:none;font-size:13px}
    .footer-links a:hover{text-decoration:underline}
    .footer-bottom{padding:13px 0;border-top:1px solid #d2ded6;color:#5c7067;font-size:12px}
    .back-top{position:fixed;right:18px;bottom:18px;z-index:10;width:44px;height:44px;border:0;border-radius:6px;background:var(--green);color:#fff;font-size:20px;cursor:pointer;opacity:0;pointer-events:none;transform:translateY(8px);transition:opacity .2s,transform .2s}
    .back-top.visible{opacity:1;pointer-events:auto;transform:translateY(0)}
    .reveal{opacity:0;transform:translateY(12px);transition:opacity .55s ease,transform .55s ease}
    .reveal.in-view{opacity:1;transform:translateY(0)}
    @media(max-width:900px){
      .nav-row{gap:12px}.nav-links a{padding-inline:7px;font-size:12px}
      .hero-inner{gap:28px}.service-grid{grid-template-columns:repeat(3,1fr)}
      .article-list{grid-template-columns:repeat(3,1fr)}
    }
    @media(max-width:720px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .nav-row{min-height:64px}.menu-toggle{display:inline-grid;place-items:center}
      .nav-cta{margin-left:auto;min-height:40px;padding-inline:12px;font-size:13px}
      .nav-links{display:none;position:absolute;top:63px;left:0;right:0;align-items:stretch;padding:10px 16px 14px;background:#f7faf8;border-bottom:1px solid var(--line)}
      .nav-links.open{display:grid;grid-template-columns:repeat(2,1fr)}
      .nav-links a{padding:10px}
      .hero-inner{grid-template-columns:1fr;padding-block:55px 38px}
      .hero-panel{max-width:480px}
      .metrics{grid-template-columns:repeat(2,1fr);gap:15px;padding-block:18px}
      .metric,.metric:first-child{padding:4px 12px;border-left:1px solid var(--line)}
      main section{padding-block:54px}
      .section-head{display:block}.section-head p{margin-top:12px}
      .intro-grid,.industry-grid,.pricing-grid,.contact-grid{grid-template-columns:1fr;gap:24px}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .feature-strip{grid-template-columns:1fr}
      .feature-strip div,.feature-strip div:first-child{border-left:0;border-top:1px solid var(--line)}
      .feature-strip div:first-child{border-top:0}
      .workflow{grid-template-columns:repeat(2,1fr);row-gap:25px}
      .case-grid,.review-grid{grid-template-columns:1fr 1fr}
      .article-list{grid-template-columns:repeat(2,1fr)}
      .footer-top{display:grid}
    }
    @media(max-width:480px){
      .hero-inner{padding-top:45px}
      .hero-copy{font-size:15px}
      .service-grid,.case-grid,.review-grid{grid-template-columns:1fr}
      .capability-list{grid-template-columns:1fr}
      .workflow{grid-template-columns:1fr 1fr}
      .contact-form{grid-template-columns:1fr;padding:16px}
      .field.full,.form-submit{grid-column:auto}
      .article-list{grid-template-columns:1fr 1fr}
      .join-row{align-items:flex-start;flex-direction:column}
      .review-score{align-items:flex-start;flex-wrap:wrap}
    }
    @media(prefers-reduced-motion:reduce){
      *,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}
      .reveal{opacity:1;transform:none}
    }