:root{--ink:#24201f;--muted:#6e625e;--red:#c93227;--red-dark:#92251f;--coral:#f06a52;--paper:#fff9f6;--line:#eadbd5;--soft:#f8ebe6;--white:#fff;--green:#26705c;--max:1180px}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth;scroll-padding-top:90px}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7}
    a{color:inherit}
    img{max-width:100%;height:auto}
    .container{width:min(var(--max),calc(100% - 40px));margin-inline:auto}
    .topbar{background:#fff1ec;border-bottom:1px solid #f1d8ce;color:#643a32;font-size:13px}
    .topbar .container{min-height:34px;display:flex;align-items:center;justify-content:space-between;gap:12px}
    .topbar a{text-decoration:none}
    header{position:sticky;top:0;z-index:20;background:rgba(255,249,246,.96);backdrop-filter:blur(12px);border-bottom:1px solid rgba(234,219,213,.85)}
    .header-row{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}
    .brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-weight:800;font-size:19px;white-space:nowrap}
    .ai-page-logo{width:42px;max-height:42px;object-fit:contain}
    .nav-wrap{display:flex;align-items:center;gap:14px}
    .nav-links{display:flex;align-items:center;gap:0;list-style:none;padding:0;margin:0}
    .nav-links a{display:block;padding:10px 9px;color:#514744;text-decoration:none;font-size:13px;white-space:nowrap;border-radius:5px;transition:background .2s,color .2s}
    .nav-links a:hover{background:#f8e6df;color:var(--red)}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 18px;border:1px solid transparent;border-radius:5px;text-decoration:none;font-weight:700;font-size:14px;transition:transform .2s,box-shadow .2s,background .2s}
    .btn:hover{transform:translateY(-2px);box-shadow:0 8px 20px #a52d222b}
    .btn-primary{background:var(--red);color:white}
    .btn-primary:hover{background:var(--red-dark)}
    .btn-outline{border-color:#d9aaa0;color:var(--red-dark);background:#fff}
    .menu-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);background:white;border-radius:5px;color:var(--ink);font-size:20px}
    .hero{position:relative;overflow:hidden;background:linear-gradient(112deg,#fff4ef 0%,#fffaf6 55%,#ffe5dc 100%);border-bottom:1px solid #f0d6cb}
    .hero:after{content:"";position:absolute;right:-90px;top:-115px;width:360px;height:360px;border:1px solid #e99b8c55;border-radius:50%;box-shadow:0 0 0 36px #e99b8c12,0 0 0 74px #e99b8c0a;pointer-events:none}
    .hero-inner{position:relative;z-index:1;padding:76px 0 36px}
    .hero-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(250px,.8fr);gap:44px;align-items:center}
    .eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--red-dark);font-weight:800;font-size:13px;letter-spacing:1px}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--coral)}
    h1{max-width:730px;margin:14px 0 15px;font-size:clamp(38px,5vw,64px);line-height:1.12;letter-spacing:0;color:#2b211f}
    .hero-copy{max-width:650px;color:#665854;font-size:17px;margin:0 0 25px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:11px}
    .hero-note{font-size:12px;color:#7a655f;margin:14px 0 0}
    .hero-panel{padding:25px 24px;background:#fff;border:1px solid #eed4cb;border-radius:8px;box-shadow:0 18px 45px #81291b12}
    .hero-panel h2{font-size:18px;margin:0 0 14px}
    .model-chips{display:flex;flex-wrap:wrap;gap:8px}
    .model-chips span{padding:5px 10px;background:#fff2ed;border:1px solid #f2d7ce;color:#623b33;border-radius:3px;font-size:12px}
    .hero-panel p{color:var(--muted);font-size:13px;margin:15px 0 0}
    .metric-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:48px;border-top:1px solid #edcfc5}
    .metric{padding:19px 20px 4px 0}
    .metric strong{display:block;color:var(--red-dark);font-size:18px}
    .metric span{font-size:12px;color:var(--muted)}
    section.content-section{padding:72px 0}
    .section-head{max-width:720px;margin-bottom:30px}
    .section-kicker{font-size:12px;text-transform:uppercase;color:var(--red);font-weight:800;letter-spacing:1.1px}
    h2.section-title{font-size:34px;line-height:1.22;margin:8px 0 10px;letter-spacing:0}
    .section-intro{color:var(--muted);margin:0}
    .about-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
    .about-copy p{margin:0 0 15px;color:#514744}
    .about-points{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line)}
    .about-point{background:#fff;padding:17px}
    .about-point strong{display:block;font-size:15px;margin-bottom:4px}
    .about-point span{font-size:13px;color:var(--muted)}
    .service-section{background:#fff3ee;border-block:1px solid #f0d9d0}
    .service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .service-item{padding:20px;background:#fff;border:1px solid #ecdcd6;border-top:3px solid var(--coral);transition:transform .2s,box-shadow .2s}
    .service-item:hover{transform:translateY(-4px);box-shadow:0 12px 26px #7a2a1c12}
    .service-item h3{margin:0 0 8px;font-size:16px}
    .service-item p{margin:0;color:var(--muted);font-size:13px}
    .service-tag{display:inline-block;margin-top:13px;color:var(--red-dark);font-size:11px;font-weight:700}
    .workflow{display:grid;grid-template-columns:repeat(4,1fr);gap:0;counter-reset:step}
    .workflow article{position:relative;padding:8px 22px 12px 0;border-top:2px solid #e8c9bf;counter-increment:step}
    .workflow article:before{content:"0" counter(step);display:inline-block;margin-top:-20px;padding:3px 8px;background:var(--red);color:#fff;font-size:12px;font-weight:800}
    .workflow h3{font-size:16px;margin:11px 0 5px}
    .workflow p{font-size:13px;color:var(--muted);margin:0}
    .industry-band{background:#292321;color:#fff;padding:55px 0}
    .industry-band .section-kicker{color:#ff9a83}
    .industry-band h2{margin:8px 0 9px;font-size:29px}
    .industry-band p{max-width:780px;margin:0;color:#eadbd6}
    .industry-list{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}
    .industry-list span{padding:7px 12px;border:1px solid #775b54;border-radius:3px;color:#fff1ec;font-size:13px}
    .network{display:flex;flex-wrap:wrap;gap:10px}
    .network span{padding:9px 13px;background:#fff;border:1px solid var(--line);font-size:13px;color:#423734}
    .comparison-wrap{overflow-x:auto;border:1px solid var(--line);background:white}
    table{width:100%;border-collapse:collapse;min-width:720px}
    th,td{padding:14px 16px;text-align:left;border-bottom:1px solid #eee3df;font-size:13px}
    th{background:#fff0eb;color:#563b35;font-size:13px}
    td:first-child{font-weight:700;width:21%}
    .rating-row{display:flex;align-items:center;gap:18px;margin-bottom:18px;padding:20px 22px;background:#fff;border-left:4px solid var(--red)}
    .rating-score{font-weight:800;font-size:31px;color:var(--red-dark);line-height:1}
    .stars{color:#e4583c;letter-spacing:2px;font-size:18px}
    .rating-row p{margin:4px 0 0;color:var(--muted);font-size:13px}
    .case-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .case-card{background:white;border:1px solid var(--line);padding:15px}
    .case-card .image-frame{overflow:hidden;background:#f3e5df;aspect-ratio:16/9}
    .case-card img{display:block;width:100%;height:100%;object-fit:cover}
    .case-card h3{margin:13px 0 5px;font-size:17px}
    .case-card p{margin:0;color:var(--muted);font-size:13px}
    .feedback-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}
    .feedback{padding:18px;background:#fff;border:1px solid var(--line)}
    .feedback blockquote{margin:0;color:#493e3a;font-size:14px}
    .feedback cite{display:block;margin-top:13px;color:var(--red-dark);font-style:normal;font-weight:700;font-size:12px}
    .feedback-label{font-size:12px;color:var(--muted);margin:0 0 16px}
    .article-links{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
    .article-links a{padding:14px;background:#fff;border:1px solid var(--line);text-decoration:none;font-size:13px;color:#443a36;transition:border .2s,color .2s}
    .article-links a:hover{border-color:var(--coral);color:var(--red-dark)}
    .faq-list{border-top:1px solid var(--line)}
    details{border-bottom:1px solid var(--line);background:transparent}
    summary{position:relative;list-style:none;cursor:pointer;padding:17px 38px 17px 2px;font-weight:700;font-size:15px}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";position:absolute;right:5px;top:13px;color:var(--red);font-size:22px;font-weight:400}
    details[open] summary:after{content:"−"}
    details p{max-width:850px;margin:0;padding:0 30px 17px 2px;color:var(--muted);font-size:14px}
    .contact-section{background:#fff0eb;border-top:1px solid #efd6cd}
    .contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:34px;align-items:start}
    .contact-info{padding:22px;background:#fff;border:1px solid var(--line)}
    .contact-info h3{margin:0 0 11px}
    .contact-info p{margin:6px 0;color:#514744;font-size:14px}
    .qr{width:150px;margin-top:14px;border:1px solid var(--line);padding:5px;background:#fff}
    form{display:grid;grid-template-columns:1fr 1fr;gap:13px}
    .field{display:flex;flex-direction:column;gap:5px}
    .field.full{grid-column:1/-1}
    label{font-size:13px;font-weight:700}
    input,select,textarea{width:100%;padding:11px 12px;border:1px solid #d9c8c1;border-radius:3px;background:white;color:var(--ink);font:inherit;font-size:14px}
    textarea{min-height:112px;resize:vertical}
    input:focus,select:focus,textarea:focus{outline:2px solid #e89b8e;outline-offset:1px}
    .form-submit{grid-column:1/-1;justify-self:start}
    .footer{background:#292321;color:#f8e9e3;padding:30px 0 22px}
    .footer-main{display:flex;align-items:flex-start;justify-content:space-between;gap:28px}
    .footer p{margin:5px 0;color:#ddcbc5;font-size:13px}
    .footer-links{display:flex;flex-wrap:wrap;gap:8px 16px;max-width:650px}
    .footer a{color:#ffe4da;font-size:13px;text-decoration:none}
    .footer a:hover{text-decoration:underline}
    .copyright{border-top:1px solid #594842;margin-top:21px;padding-top:15px;color:#cbbab4;font-size:12px}
    .floating{position:fixed;right:18px;bottom:20px;z-index:15;display:flex;flex-direction:column;gap:8px}
    .floating a{width:48px;height:48px;display:grid;place-items:center;border-radius:50%;background:var(--red);color:#fff;text-decoration:none;font-size:12px;font-weight:700;box-shadow:0 5px 15px #58241d38}
    .floating a:last-child{background:#fff;color:var(--red-dark);border:1px solid #dfbdb3}
    .reveal{opacity:0;transform:translateY(14px);transition:opacity .55s ease,transform .55s ease}
    .reveal.is-visible{opacity:1;transform:translateY(0)}
    @media (prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}.reveal{opacity:1;transform:none}}
    @media(max-width:980px){
      .menu-toggle{display:inline-grid;place-items:center}
      .nav-wrap{gap:8px}
      .nav-links{display:none;position:absolute;top:72px;left:0;right:0;padding:10px 20px 16px;background:var(--paper);border-bottom:1px solid var(--line);flex-wrap:wrap}
      .nav-links.open{display:flex}
      .nav-links a{padding:9px 12px}
      .header-cta{display:none}
      .hero-grid{gap:25px}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .article-links{grid-template-columns:repeat(3,1fr)}
    }
    @media(max-width:680px){
      .container{width:min(var(--max),calc(100% - 30px))}
      .topbar .container{justify-content:center}
      .topbar .topbar-secondary{display:none}
      .header-row{min-height:64px}
      .brand{font-size:17px}
      .nav-links{top:64px}
      .hero-inner{padding:52px 0 25px}
      .hero-grid,.about-grid,.contact-grid{grid-template-columns:1fr}
      h1{font-size:42px}
      .hero-copy{font-size:15px}
      .hero-panel{padding:19px}
      .metric-strip{grid-template-columns:1fr 1fr;margin-top:31px}
      .metric{padding:14px 10px 7px 0}
      section.content-section{padding:53px 0}
      h2.section-title{font-size:28px}
      .about-points{grid-template-columns:1fr 1fr}
      .service-grid{grid-template-columns:1fr}
      .workflow{grid-template-columns:1fr 1fr;row-gap:22px}
      .workflow article{padding-right:12px}
      .industry-band{padding:42px 0}
      .case-grid,.feedback-grid{grid-template-columns:1fr}
      .article-links{grid-template-columns:1fr 1fr}
      .rating-row{align-items:flex-start;gap:12px}
      form{grid-template-columns:1fr}
      .field.full,.form-submit{grid-column:auto}
      .footer-main{flex-direction:column}
      .floating{right:10px;bottom:12px}
      .floating a{width:44px;height:44px}
    }