:root{--ink:#20221f;--muted:#66695f;--paper:#fffdf7;--lime:#d7f45b;--coral:#ff715b;--blue:#6cc9e8;--violet:#b9a0ed;--line:#e7e3d8;--white:#fff}
    *{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",system-ui,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(255,253,247,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
    .nav{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:850;white-space:nowrap}
    .ai-page-logo{width:42px;height:42px;object-fit:contain}
    .nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;list-style:none;margin:0;padding:0;flex-wrap:wrap}
    .nav-links a{display:block;padding:9px 10px;text-decoration:none;font-size:13px;font-weight:650;color:#42443e}
    .nav-links a:hover{color:#a33d2e}
    .nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--ink);background:var(--ink);color:white;text-decoration:none;padding:12px 18px;font-weight:750;transition:transform .2s,box-shadow .2s,background .2s}
    .nav-cta{white-space:nowrap;padding:10px 14px}
    .button:hover,.nav-cta:hover{transform:translateY(-2px);box-shadow:4px 4px 0 var(--coral)}
    .button.light{background:var(--paper);color:var(--ink);border-color:var(--paper)}
    .button.outline{background:transparent;color:var(--ink)}
    .menu-toggle{display:none;border:1px solid var(--ink);background:transparent;width:42px;height:42px;font-size:20px}
    .hero{position:relative;overflow:hidden;padding:78px 0 54px;background-color:#fff7e7;background-image:radial-gradient(#25251f 1px,transparent 1.5px);background-size:23px 23px}
    .hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(280px,.85fr);gap:48px;align-items:center}
    .hero-copy{background:var(--paper);padding:26px 30px 28px;border:2px solid var(--ink);box-shadow:10px 10px 0 var(--lime);max-width:710px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;text-transform:uppercase;font-size:12px;letter-spacing:.08em;font-weight:850}
    .eyebrow:before{content:"";width:20px;height:8px;background:var(--coral);transform:rotate(-8deg)}
    h1{font-size:clamp(42px,6vw,72px);line-height:1.06;margin:18px 0 18px;max-width:680px}
    .hero-copy p{font-size:17px;color:#4c4d46;max-width:590px;margin:0 0 22px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
    .hero-note{font-size:12px!important;margin:16px 0 0!important;color:#68695f!important}
    .hero-art{min-height:300px;position:relative;display:grid;place-items:center}
    .art-sheet{width:min(100%,390px);padding:22px;background:#fff;border:2px solid var(--ink);transform:rotate(2deg);box-shadow:12px 12px 0 var(--coral);animation:float 5s ease-in-out infinite}
    .art-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:14px;font-weight:800}
    .art-mark{width:36px;height:36px;background:var(--blue);border:2px solid var(--ink);display:grid;place-items:center;font-weight:900}
    .art-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:16px 0}
    .art-tile{min-height:82px;padding:12px;border:1.5px solid var(--ink);font-size:13px;font-weight:800;display:flex;align-items:flex-end}
    .art-tile:nth-child(1){background:var(--lime)}.art-tile:nth-child(2){background:var(--violet)}.art-tile:nth-child(3){background:var(--coral)}.art-tile:nth-child(4){background:var(--blue)}
    .art-foot{font-size:12px;color:var(--muted);display:flex;justify-content:space-between}
    .sticker{position:absolute;right:0;top:10px;background:var(--lime);border:2px solid var(--ink);padding:12px 15px;font-weight:900;transform:rotate(8deg)}
    .metrics{padding:22px 0 50px}
    .metric-row{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--ink);background:white}
    .metric{padding:20px 22px;border-right:1px solid var(--ink)}
    .metric:last-child{border-right:0}
    .metric strong{display:block;font-size:22px;line-height:1.25}
    .metric span{font-size:13px;color:var(--muted)}
    section.content-section{padding:64px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:28px}
    .section-head h2{font-size:clamp(28px,4vw,42px);line-height:1.15;margin:8px 0 0}
    .section-head p{max-width:520px;margin:0;color:var(--muted)}
    .kicker{font-size:12px;font-weight:850;text-transform:uppercase;letter-spacing:.1em;color:#a34532}
    .intro-band{background:#e9f6f2;border-block:1px solid #c9ded7}
    .intro-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:42px;align-items:start}
    .intro-layout p{color:#4f554f}
    .intro-points{display:grid;grid-template-columns:1fr 1fr;gap:0 22px;margin:0;padding:0;list-style:none}
    .intro-points li{padding:13px 0;border-bottom:1px solid #c5d8d0;font-weight:700}
    .intro-points li:before{content:"↗";color:#ce553d;margin-right:9px}
    .services{background:#fffdf7}
    .service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .service{border:1px solid var(--ink);padding:20px;background:#fff;min-height:160px;transition:transform .2s,box-shadow .2s}
    .service:hover{transform:translateY(-4px);box-shadow:5px 5px 0 var(--lime)}
    .service .tag{display:inline-block;font-size:11px;font-weight:800;padding:3px 8px;background:var(--lime);margin-bottom:12px}
    .service h3{font-size:19px;margin:0 0 7px}
    .service p{font-size:14px;color:var(--muted);margin:0}
    .model-line{margin-top:26px;padding:18px 20px;border-left:5px solid var(--coral);background:#fff1e9}
    .model-line strong{display:block;margin-bottom:8px}
    .model-list{display:flex;flex-wrap:wrap;gap:8px}
    .model-list span{font-size:12px;border:1px solid #d9c5b9;padding:4px 9px;background:#fff}
    .workflow{background:#242721;color:white}
    .workflow .section-head p,.workflow .kicker{color:#d7d9cc}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
    .step{padding:20px 20px 20px 0;border-top:2px solid var(--lime);position:relative}
    .step b{display:block;font-size:18px;margin:10px 0 6px}
    .step span{font-size:13px;color:#d3d4cd}
    .step-no{color:var(--lime);font-weight:900;font-size:12px}
    .solutions{background:#f4f1ff}
    .solution-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .solution{padding:22px 20px;border-top:4px solid var(--violet);background:white}
    .solution:nth-child(2){border-color:var(--coral)}.solution:nth-child(3){border-color:#64b9a8}
    .solution h3{margin:0 0 8px}.solution p{margin:0;color:var(--muted);font-size:14px}
    .network{background:#f2f8fa}
    .network-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:32px;align-items:start}
    .network-copy{padding:24px;background:var(--blue);border:1px solid var(--ink)}
    .network-copy h3{margin-top:0}
    .network-copy p{margin-bottom:0}
    .network-tags{display:flex;flex-wrap:wrap;gap:10px}
    .network-tags span{padding:9px 13px;border:1px solid var(--ink);background:#fff;font-weight:700;font-size:13px}
    .compare{background:#fff}
    .score-block{display:flex;align-items:center;gap:20px;margin-bottom:20px;padding:20px 24px;background:var(--lime);border:1px solid var(--ink)}
    .score-block strong{font-size:40px;line-height:1}
    .stars{color:#a4432f;font-size:20px;letter-spacing:2px}
    .table-wrap{overflow-x:auto;border:1px solid var(--ink)}
    table{width:100%;border-collapse:collapse;min-width:720px;text-align:left}
    th,td{padding:13px 15px;border-bottom:1px solid var(--line);vertical-align:top}
    th{background:#252721;color:white;font-size:13px}
    td{font-size:14px}
    tr:last-child td{border-bottom:0}
    td:first-child{font-weight:750;width:21%}
    .good{font-weight:800;color:#326a43}
    .muted{color:var(--muted)}
    .cases{background:#fff4ec}
    .case-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .case{display:grid;grid-template-columns:160px 1fr;gap:18px;align-items:center;background:white;border:1px solid var(--ink);padding:12px}
    .image-frame{width:100%;aspect-ratio:1.1;overflow:hidden;background:#eee}
    .image-frame img{display:block;width:100%;height:100%;object-fit:cover}
    .case h3{margin:0 0 7px}.case p{margin:0;color:var(--muted);font-size:14px}
    .reviews{background:#fffdf7}
    .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .review{padding:20px;border:1px solid var(--ink);background:white}
    .review blockquote{margin:0 0 15px;font-size:15px}
    .review cite{font-size:12px;color:var(--muted);font-style:normal;font-weight:750}
    .review small{display:block;margin-top:4px;color:#a34532}
    .price-row{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}
    .price-copy{max-width:620px}
    .price-note{border:1px dashed #76766c;padding:20px 22px;background:#fff}
    .price-note strong{font-size:17px}
    .price-note p{margin:8px 0 0;color:var(--muted);font-size:14px}
    .articles{background:#e9f6f2}
    .article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .article{padding:18px;background:white;border-bottom:3px solid #66bca8;text-decoration:none;font-weight:750;transition:transform .2s}
    .article:hover{transform:translateY(-3px)}
    .article span{display:block;margin-top:9px;font-size:12px;color:var(--muted);font-weight:500}
    .faq{background:#fff}
    .faq-list{max-width:900px}
    details{border-top:1px solid var(--line)}
    details:last-child{border-bottom:1px solid var(--line)}
    summary{cursor:pointer;list-style:none;padding:17px 36px 17px 0;font-weight:750;position:relative}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";position:absolute;right:4px;top:12px;font-size:22px}
    details[open] summary:after{content:"−"}
    details p{margin:0 0 18px;color:var(--muted);max-width:800px}
    .contact{background:#fff1e9}
    .contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:34px;align-items:start}
    .contact-info{padding:22px 0}
    .contact-info p{color:var(--muted)}
    .contact-lines{list-style:none;padding:0;margin:20px 0}
    .contact-lines li{padding:8px 0;border-bottom:1px solid #e6c9bc}
    form{display:grid;grid-template-columns:1fr 1fr;gap:14px;background:white;padding:22px;border:1px solid var(--ink)}
    .field{display:flex;flex-direction:column;gap:6px}
    .field.full{grid-column:1/-1}
    label{font-size:13px;font-weight:750}
    input,select,textarea{width:100%;border:1px solid #c8c6bd;padding:11px 12px;background:#fff;color:var(--ink);border-radius:0}
    input:focus,select:focus,textarea:focus{outline:2px solid var(--blue);outline-offset:1px}
    textarea{min-height:110px;resize:vertical}
    .form-submit{grid-column:1/-1;justify-self:start}
    .join{background:#d7f45b;padding:34px 0}
    .join-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
    .join h2{margin:0;font-size:28px}.join p{margin:5px 0 0}
    .site-footer{background:#242721;color:#f6f4e9;padding:30px 0 20px}
    .footer-main{display:flex;align-items:start;justify-content:space-between;gap:30px;padding-bottom:22px}
    .footer-main p{max-width:540px;color:#d0d1c8;font-size:13px}
    .footer-links{display:flex;flex-wrap:wrap;gap:8px 16px;max-width:520px}
    .footer-links a{color:#f6f4e9;font-size:13px;text-decoration:none}
    .footer-links a:hover{text-decoration:underline}
    .copyright{border-top:1px solid #505149;padding-top:14px;color:#c4c5bb;font-size:12px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
    .float-contact{position:fixed;right:18px;bottom:22px;z-index:15;display:flex;flex-direction:column;gap:8px}
    .float-contact a,.to-top{width:48px;height:48px;display:grid;place-items:center;border:1px solid var(--ink);background:var(--lime);color:var(--ink);text-decoration:none;font-weight:900;box-shadow:3px 3px 0 var(--ink);cursor:pointer}
    .to-top{display:none;font-size:18px}
    .reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
    .reveal.visible{opacity:1;transform:none}
    @keyframes float{0%,100%{transform:rotate(2deg) translateY(0)}50%{transform:rotate(0deg) translateY(-7px)}}
    @media(max-width:900px){
      .nav-links{gap:0}.nav-links a{padding:8px 7px;font-size:12px}
      .hero-inner{gap:26px}.service-grid{grid-template-columns:repeat(2,1fr)}
      .review-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:720px){
      .container{width:min(100% - 30px,1160px)}
      .nav{min-height:66px;position:relative}
      .menu-toggle{display:block}
      .nav-cta{margin-left:auto;padding:9px 11px;font-size:12px}
      .nav-links{display:none;position:absolute;top:65px;left:-15px;right:-15px;background:var(--paper);padding:10px 15px 16px;border-bottom:1px solid var(--line);grid-template-columns:repeat(3,1fr);z-index:4}
      .nav-links.open{display:grid}
      .nav-links a{padding:10px 8px;font-size:13px}
      .hero{padding:42px 0 35px}
      .hero-inner{grid-template-columns:1fr;gap:26px}
      .hero-copy{padding:22px 20px;box-shadow:6px 6px 0 var(--lime)}
      h1{font-size:44px}
      .hero-art{min-height:270px}
      .sticker{right:2%;top:0}
      .metric-row{grid-template-columns:1fr 1fr}
      .metric:nth-child(2){border-right:0}.metric:nth-child(-n+2){border-bottom:1px solid var(--ink)}
      section.content-section{padding:48px 0}
      .section-head{align-items:start;flex-direction:column;gap:12px}
      .intro-layout,.network-layout,.price-row,.contact-grid{grid-template-columns:1fr;gap:22px}
      .steps{grid-template-columns:1fr 1fr;gap:16px}
      .step{padding-right:12px}
      .solution-grid{grid-template-columns:1fr}
      .case-grid{grid-template-columns:1fr}
      .review-grid{grid-template-columns:1fr 1fr}
      .article-grid{grid-template-columns:1fr 1fr}
      .join-inner{align-items:flex-start;flex-direction:column}
      .footer-main{flex-direction:column}
    }
    @media(max-width:480px){
      .brand{font-size:14px}.ai-page-logo{width:36px;height:36px}
      .nav-cta{display:none}
      .hero-actions .button{width:100%}
      .metric{padding:16px}
      .metric strong{font-size:19px}
      .service-grid,.review-grid,.article-grid,.intro-points{grid-template-columns:1fr}
      .service{min-height:0}
      .case{grid-template-columns:110px 1fr;gap:12px}
      .case h3{font-size:16px}
      .score-block{align-items:flex-start;flex-direction:column;gap:8px}
      form{grid-template-columns:1fr;padding:16px}
      .field.full,.form-submit{grid-column:auto}
      .float-contact{right:12px;bottom:14px}
    }
    @media(prefers-reduced-motion:reduce){
      *,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}
      .reveal{opacity:1;transform:none}
    }