:root{--ink:#202923;--muted:#637067;--paper:#f7f8f4;--white:#fff;--line:#dce4db;--green:#176b50;--lime:#d7f16a;--coral:#f3a38a;--blue:#b9dcf3;--shadow:0 14px 34px rgba(25,48,37,.08)}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;line-height:1.65}
    a{color:inherit}
    button,input,select,textarea{font:inherit}
    .container{width:min(1160px,calc(100% - 40px));margin-inline:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(247,248,244,.94);border-bottom:1px solid rgba(220,228,219,.85);backdrop-filter:blur(14px)}
    .nav-row{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:22px}
    .brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-weight:800;white-space:nowrap}
    .ai-page-logo{display:block;width:42px;max-width:100%;height:auto}
    .nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap}
    .nav-links a{padding:9px 10px;text-decoration:none;color:#455149;font-size:13px}
    .nav-links a:hover{color:var(--green)}
    .nav-cta,.button{display:inline-flex;justify-content:center;align-items:center;gap:8px;border:0;border-radius:5px;background:var(--green);color:#fff;text-decoration:none;padding:12px 19px;font-weight:700;transition:transform .2s,background .2s,box-shadow .2s;cursor:pointer}
    .nav-cta:hover,.button:hover{background:#10573f;transform:translateY(-2px);box-shadow:0 8px 18px rgba(23,107,80,.18)}
    .menu-toggle{display:none;background:transparent;border:1px solid var(--line);border-radius:5px;padding:8px 11px;color:var(--ink)}
    .hero{position:relative;overflow:hidden;background:#eaf4e9;border-bottom:1px solid var(--line)}
    .hero:before{content:"";position:absolute;inset:0;background:linear-gradient(112deg,transparent 54%,rgba(215,241,106,.48) 54%,rgba(215,241,106,.48) 70%,transparent 70%),linear-gradient(155deg,transparent 72%,rgba(185,220,243,.58) 72%);pointer-events:none}
    .hero-inner{position:relative;padding:78px 0 54px}
    .eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--green);font-size:13px;font-weight:800;letter-spacing:.08em}
    .eyebrow:before{content:"";width:25px;height:2px;background:var(--coral)}
    h1{max-width:740px;margin:20px 0 16px;font-size:clamp(42px,6vw,70px);line-height:1.08;letter-spacing:0}
    .hero-copy{max-width:650px;color:#48554c;font-size:18px;margin:0}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
    .button.secondary{background:#fff;color:var(--green);border:1px solid #b5c9bc}
    .hero-note{margin-top:16px;color:#65736a;font-size:13px}
    .hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:55px;border-top:1px solid #cbd9cd}
    .hero-stat{padding:20px 20px 0 0}
    .hero-stat strong{display:block;font-size:21px;color:var(--green)}
    .hero-stat span{font-size:13px;color:var(--muted)}
    section{scroll-margin-top:90px}
    .section{padding:76px 0}
    .section.alt{background:#edf2eb;border-block:1px solid #e0e7df}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:28px;margin-bottom:30px}
    .section-kicker{color:var(--green);font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:.12em}
    h2{font-size:clamp(29px,4vw,42px);line-height:1.18;letter-spacing:0;margin:8px 0 0}
    .section-head p{max-width:520px;margin:0;color:var(--muted)}
    .intro-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:start}
    .intro-copy{font-size:17px;color:#46534a}
    .intro-copy p{margin:0 0 16px}
    .feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0 24px;border-top:1px solid var(--line)}
    .feature-list div{padding:14px 0;border-bottom:1px solid var(--line);font-weight:700}
    .feature-list span{display:block;color:var(--muted);font-weight:400;font-size:13px;margin-top:3px}
    .service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .service{padding:22px;background:var(--white);border:1px solid var(--line);border-top:3px solid var(--green);transition:transform .22s,box-shadow .22s}
    .service:nth-child(3n+2){border-top-color:#ed9b7f}
    .service:nth-child(3n){border-top-color:#8ebbd5}
    .service:hover,.quote:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .service h3{font-size:18px;margin:0 0 8px}
    .service p{margin:0;color:var(--muted);font-size:14px}
    .tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
    .tag{border:1px solid #cbd8cb;background:#f8faf6;padding:6px 10px;font-size:12px;color:#405147}
    .workflow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
    .step{border-top:1px solid #9eafa2;padding:18px 10px 0 0;counter-increment:step}
    .step:before{content:"0" counter(step);display:block;color:var(--green);font-size:14px;font-weight:800;margin-bottom:12px}
    .step h3{margin:0 0 7px;font-size:17px}
    .step p{margin:0;color:var(--muted);font-size:14px}
    .solution-band{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;background:#dff0e4;padding:30px}
    .solution-band h3{margin:0 0 10px;font-size:25px}
    .solution-band p{margin:0;color:#526157}
    .solution-items{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .solution-items span{padding:12px;background:rgba(255,255,255,.75);font-size:14px;font-weight:700}
    .network{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}
    .network span{padding:8px 12px;background:#fff;border:1px solid var(--line);font-size:13px}
    .comparison-wrap{overflow-x:auto;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:720px;text-align:left}
    th,td{padding:14px 16px;border-bottom:1px solid #e5ebe4;font-size:14px}
    th{background:#eaf3e9;color:#31443a}
    tr:last-child td{border-bottom:0}
    .rating{display:flex;align-items:center;gap:18px;margin-bottom:22px}
    .rating strong{font-size:38px;color:var(--green)}
    .stars{color:#db8d28;letter-spacing:0;font-size:21px}
    .rating small{color:var(--muted)}
    .case-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
    .case{background:#fff;border:1px solid var(--line);overflow:hidden}
    .case img{display:block;width:100%;height:auto;aspect-ratio:16/8;object-fit:cover}
    .case-body{padding:17px 19px}
    .case-body h3{margin:0 0 5px;font-size:18px}
    .case-body p{margin:0;color:var(--muted);font-size:14px}
    .square-case{display:grid;grid-template-columns:150px 1fr;align-items:center;gap:20px;margin-top:20px;padding:16px;border:1px solid var(--line);background:#fff}
    .square-case img{width:100%;height:auto;aspect-ratio:1;object-fit:cover}
    .quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}
    .quote{padding:20px;background:#fff;border:1px solid var(--line);transition:transform .2s,box-shadow .2s}
    .quote blockquote{margin:0 0 18px;color:#425047;font-size:14px}
    .quote strong{display:block;font-size:13px}
    .quote span{font-size:12px;color:var(--muted)}
    .price-note{display:grid;grid-template-columns:1fr auto;align-items:center;gap:20px;padding:22px 24px;background:#203b30;color:#fff}
    .price-note h3{margin:0 0 5px}
    .price-note p{margin:0;color:#d4e2d8;font-size:14px}
    .price-note .button{background:var(--lime);color:#203b30;white-space:nowrap}
    .faq-list{border-top:1px solid var(--line)}
    details{border-bottom:1px solid var(--line);background:transparent}
    summary{list-style:none;cursor:pointer;padding:17px 36px 17px 0;font-weight:700;position:relative}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";position:absolute;right:5px;top:13px;font-size:23px;color:var(--green)}
    details[open] summary:after{content:"−"}
    details p{max-width:850px;margin:0;padding:0 24px 18px 0;color:var(--muted);font-size:14px}
    .article-list{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
    .article-list a{display:flex;min-height:115px;flex-direction:column;justify-content:space-between;padding:16px;background:#fff;border:1px solid var(--line);text-decoration:none;font-weight:700}
    .article-list a span{font-size:12px;color:var(--green)}
    .contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:38px;align-items:start}
    .contact-copy p{color:var(--muted)}
    .contact-lines{padding:0;margin:20px 0;list-style:none}
    .contact-lines li{padding:8px 0;border-bottom:1px solid var(--line)}
    .contact-lines a{color:var(--green)}
    .qr{width:132px;max-width:100%;height:auto;border:1px solid var(--line);background:#fff;padding:5px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
    .field{display:flex;flex-direction:column;gap:6px}
    .field.full{grid-column:1/-1}
    .field label{font-size:13px;font-weight:700}
    .field input,.field select,.field textarea{width:100%;padding:11px 12px;border:1px solid #cbd6cc;background:#fff;color:var(--ink);border-radius:3px}
    .field textarea{min-height:115px;resize:vertical}
    .field input:focus,.field select:focus,.field textarea:focus{outline:2px solid #a9d3b9;border-color:var(--green)}
    .submit-row{grid-column:1/-1}
    .form-status{min-height:24px;color:var(--green);font-size:13px}
    .timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .timeline article{padding-top:16px;border-top:3px solid var(--coral)}
    .timeline h3{margin:0 0 6px;font-size:17px}
    .timeline p{margin:0;color:var(--muted);font-size:14px}
    .footer{background:#e5ece5;color:#27362d;border-top:1px solid #d1ddd2;padding:28px 0}
    .footer-row{display:flex;justify-content:space-between;align-items:flex-start;gap:25px}
    .footer p{margin:6px 0;color:#526157;font-size:13px}
    .footer-links{display:flex;flex-wrap:wrap;gap:8px 17px;max-width:650px}
    .footer-links a{color:#315944;font-size:13px}
    .float-tools{position:fixed;right:18px;bottom:20px;z-index:15;display:grid;gap:8px}
    .float-tools a,.float-tools button{width:46px;height:46px;display:grid;place-items:center;border:1px solid #cbd6cc;background:#fff;color:var(--green);text-decoration:none;font-weight:800;box-shadow:0 5px 16px rgba(25,48,37,.12);cursor:pointer}
    .reveal{opacity:0;transform:translateY(12px);transition:opacity .55s,transform .55s}
    .reveal.visible{opacity:1;transform:none}
    @media(max-width:900px){
      .menu-toggle{display:block}
      .nav-row{position:relative}
      .nav-links{display:none;position:absolute;top:68px;left:0;right:0;padding:10px;background:var(--paper);border:1px solid var(--line);box-shadow:var(--shadow);align-items:stretch;max-height:70vh;overflow:auto}
      .nav-links.open{display:grid;grid-template-columns:repeat(3,1fr)}
      .nav-cta{display:none}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .article-list{grid-template-columns:repeat(3,1fr)}
      .intro-grid{gap:28px}
    }
    @media(max-width:620px){
      .container{width:min(100% - 30px,1160px)}
      .hero-inner{padding:58px 0 35px}
      h1{font-size:43px}
      .hero-copy{font-size:16px}
      .hero-stats{grid-template-columns:repeat(2,1fr);margin-top:38px}
      .hero-stat{padding:15px 5px 0 0}
      .section{padding:54px 0}
      .section-head{display:block}
      .section-head p{margin-top:12px}
      .intro-grid,.contact-grid,.solution-band{grid-template-columns:1fr}
      .service-grid,.quote-grid{grid-template-columns:1fr}
      .workflow{grid-template-columns:repeat(2,1fr)}
      .case-grid{grid-template-columns:1fr}
      .square-case{grid-template-columns:100px 1fr}
      .article-list{grid-template-columns:1fr 1fr}
      .price-note{grid-template-columns:1fr}
      .price-note .button{justify-self:start}
      .timeline{grid-template-columns:1fr}
      .footer-row{display:block}
      .footer-links{margin-top:14px}
      .nav-links.open{grid-template-columns:repeat(2,1fr)}
      .form-grid{grid-template-columns:1fr}
      .field.full,.submit-row{grid-column:auto}
      .float-tools{right:10px;bottom:12px}
      .float-tools a,.float-tools button{width:42px;height:42px}
    }
    @media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}