:root{
  --orange:#f4511e;
  --orange-deep:#c52d13;
  --amber:#ff9d2e;
  --ink:#202329;
  --muted:#657078;
  --line:#eadfd7;
  --paper:#fffaf5;
  --cream:#fff2e5;
  --white:#fff;
  --green:#16735b;
  --shadow:0 16px 42px rgba(100,52,21,.10);
  --radius:10px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;line-height:1.7}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{width:min(1180px,calc(100% - 40px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,250,245,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.nav-bar{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.ai-page-logo{width:132px}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap;justify-content:flex-end}
.nav-links a{font-size:13px;color:#4f5457;padding:7px 8px;white-space:nowrap}
.nav-links a:hover{color:var(--orange)}
.nav-cta,.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:6px;padding:12px 20px;font-weight:700;cursor:pointer;transition:.25s ease}
.nav-cta{background:var(--orange);color:#fff;margin-left:8px}
.nav-cta:hover,.btn-primary:hover{background:var(--orange-deep);transform:translateY(-2px)}
.menu-toggle{display:none;background:none;border:1px solid var(--line);padding:8px 11px;border-radius:5px;font-size:20px}
.hero{position:relative;overflow:hidden;background:#fff1e5;padding:92px 0 72px}
.hero:before,.hero:after{content:"";position:absolute;pointer-events:none;border:1px solid rgba(244,81,30,.18);transform:rotate(18deg)}
.hero:before{width:380px;height:380px;right:-100px;top:-180px;border-radius:48px}
.hero:after{width:210px;height:210px;left:-85px;bottom:-110px;border-radius:50%}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center}
.eyebrow{display:inline-flex;color:var(--orange-deep);font-size:13px;font-weight:700;letter-spacing:1px;border-left:3px solid var(--orange);padding-left:10px}
h1,h2,h3{line-height:1.25;margin:0 0 16px}
h1{font-size:clamp(38px,6vw,70px);letter-spacing:0;margin-top:18px;max-width:720px}
h2{font-size:clamp(28px,4vw,42px)}
h3{font-size:20px}
.lead{font-size:18px;color:#4e565b;max-width:680px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0}
.btn-primary{background:var(--orange);color:#fff}
.btn-light{background:#fff;color:var(--orange-deep);border:1px solid #f2c9b5}
.btn-light:hover{border-color:var(--orange);transform:translateY(-2px)}
.hero-note{font-size:13px;color:var(--muted)}
.hero-panel{background:#fff;border:1px solid #f0c7ae;padding:25px;border-radius:var(--radius);box-shadow:var(--shadow)}
.panel-top{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:18px}
.status{color:var(--green);font-size:13px;font-weight:700}
.version-line{display:grid;grid-template-columns:70px 1fr auto;gap:12px;align-items:center;padding:13px 0;border-bottom:1px solid #f2e8e1;font-size:14px}
.version-line:last-child{border-bottom:0}
.version-tag{color:var(--orange-deep);font-weight:700}
.version-date{color:var(--muted);font-size:12px}
.check{color:var(--green);font-weight:bold}
section{padding:82px 0}
.section-head{max-width:760px;margin-bottom:34px}
.section-head p{color:var(--muted);margin:0}
.kicker{font-size:13px;color:var(--orange-deep);font-weight:700;letter-spacing:1px;text-transform:uppercase}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:24px}
.stat{background:#fff;border-left:4px solid var(--orange);padding:22px 20px;border-radius:5px;box-shadow:0 6px 24px rgba(100,52,21,.06)}
.stat strong{font-size:27px;display:block;color:var(--orange-deep)}
.stat span{font-size:13px;color:var(--muted)}
.about-band{background:#fff}
.about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:55px;align-items:center}
.media-frame{border-radius:8px;overflow:hidden;background:#f7dfcf}
.media-frame img{width:100%;aspect-ratio:16/10;object-fit:cover}
.about-points{display:grid;grid-template-columns:repeat(2,1fr);gap:13px;margin-top:25px}
.point{padding:15px 16px;border:1px solid var(--line);background:#fffaf7;border-radius:6px}
.point b{display:block;color:var(--orange-deep);margin-bottom:4px}
.service-section{background:#fff6ee}
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.service-card{background:#fff;border:1px solid var(--line);padding:25px;border-radius:8px;transition:.25s ease}
.service-card:hover,.quote:hover,.case:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#f0b594}
.service-card .icon{width:40px;height:40px;display:grid;place-items:center;background:#ffe1ca;color:var(--orange-deep);border-radius:50%;font-weight:700;margin-bottom:17px}
.service-card p,.case p,.quote p{color:var(--muted);font-size:14px;margin:0}
.service-card a{display:inline-block;margin-top:15px;color:var(--orange-deep);font-size:14px;font-weight:700}
.process{background:#202329;color:#fff}
.process .section-head p{color:#c7ccd0}
.process-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:0}
.process-step{position:relative;padding:17px 20px 12px 0;border-top:2px solid #e56a3c}
.process-step:not(:last-child):after{content:"→";position:absolute;right:16px;top:12px;color:#ff9d2e;font-size:20px}
.step-num{font-size:13px;color:#ff9d2e;font-weight:bold}
.process-step h3{font-size:17px;margin:12px 0 8px}
.process-step p{font-size:13px;color:#bdc3c6;margin:0}
.network{background:#fff}
.network-layout{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.network-box{padding:26px;background:#fff8f1;border:1px solid var(--line);border-radius:8px}
.model-cloud,.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.model-cloud span,.tag-cloud span{padding:6px 11px;background:#fff;border:1px solid #efc5ad;border-radius:4px;color:#75412d;font-size:13px}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.timeline-item{background:#fff;border-top:3px solid var(--orange);padding:21px;border-radius:4px}
.timeline-item strong{display:block;font-size:28px;color:var(--orange)}
.timeline-item p{font-size:14px;color:var(--muted);margin:7px 0 0}
.table-wrap{overflow-x:auto;border:1px solid var(--line);background:#fff;border-radius:8px}
table{width:100%;border-collapse:collapse;min-width:760px}
th,td{text-align:left;padding:16px;border-bottom:1px solid var(--line);font-size:14px}
th{background:#fff0e3;color:#6c3524}
td:first-child{font-weight:700}
.rating{display:flex;justify-content:space-between;gap:25px;align-items:center;background:#202329;color:#fff;padding:28px;margin-bottom:20px;border-radius:8px}
.rating strong{font-size:42px;color:#ffad38}
.stars{color:#ffad38;font-size:24px;letter-spacing:2px}
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.case{background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden;transition:.25s ease}
.case img{width:100%;aspect-ratio:16/9;object-fit:cover}
.case-body{padding:20px}
.case-label{color:var(--orange-deep);font-size:12px;font-weight:700}
.case h3{margin:8px 0}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:start}
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.quote{padding:23px;background:#fff;border:1px solid var(--line);border-radius:8px;transition:.25s ease}
.quote cite{display:block;font-style:normal;color:var(--orange-deep);font-size:13px;font-weight:700;margin-top:16px}
.match-box{background:#fff;border:1px solid #f0c3a5;padding:30px;border-radius:8px}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
label{font-size:13px;font-weight:700}
input,select,textarea{width:100%;border:1px solid #dfd2ca;border-radius:5px;padding:12px 13px;font:inherit;color:var(--ink);background:#fff}
textarea{min-height:120px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:2px solid rgba(244,81,30,.2);border-color:var(--orange)}
.price-list{display:grid;gap:10px}
.price-row{display:grid;grid-template-columns:1fr 1fr 1fr;align-items:center;padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:5px}
.price-row strong{color:var(--orange-deep)}
.price-row span{font-size:13px;color:var(--muted)}
.help-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.help-item{padding:19px;background:#fff;border:1px solid var(--line);border-radius:6px}
.help-item strong{color:var(--orange-deep)}
.faq-section{background:#fff6ee}
.faq-list{max-width:900px}
details{background:#fff;border:1px solid var(--line);margin-bottom:10px;border-radius:6px}
summary{cursor:pointer;padding:17px 20px;font-weight:700;list-style:none}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";float:right;color:var(--orange);font-size:21px}
details[open] summary:after{content:"−"}
details p{padding:0 20px 18px;color:var(--muted);margin:0}
.article-list{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.article-list a{background:#fff;border:1px solid var(--line);padding:16px 13px;border-radius:5px;font-size:14px;color:#693c2a;transition:.2s}
.article-list a:hover{border-color:var(--orange);color:var(--orange-deep)}
.info-band{background:#fff}
.contact-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:45px;align-items:start}
.contact-card{background:#202329;color:#fff;padding:30px;border-radius:8px}
.contact-card p{color:#ccd0d2}
.contact-line{padding:14px 0;border-bottom:1px solid #41464a;font-size:14px}
.qr{width:130px;background:#fff;padding:8px;margin-top:20px}
.footer{background:#272a2d;color:#e8ecee;padding:45px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:35px}
.footer h3{font-size:16px;color:#ffb164}
.footer p,.footer a{font-size:13px;color:#bdc3c6}
.footer-links{display:flex;flex-wrap:wrap;gap:10px 18px}
.footer-bottom{border-top:1px solid #44484b;margin-top:30px;padding-top:17px;color:#92999d;font-size:12px;display:flex;justify-content:space-between;gap:15px}
.float-contact{position:fixed;right:20px;bottom:22px;z-index:15;background:var(--orange);color:#fff;padding:12px 16px;border-radius:30px;box-shadow:0 8px 24px rgba(197,45,19,.28);font-size:14px;font-weight:700}
.to-top{position:fixed;right:20px;bottom:76px;border:1px solid var(--orange);color:var(--orange-deep);background:#fff;width:38px;height:38px;border-radius:50%;display:none;cursor:pointer}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.show{opacity:1;transform:none}
@media(max-width:1000px){
  .nav-links{display:none;position:absolute;top:76px;left:0;right:0;background:var(--paper);border-bottom:1px solid var(--line);padding:12px 20px;flex-direction:column;align-items:stretch}
  .nav-links.open{display:flex}
  .nav-links a{padding:10px 0}
  .nav-cta{margin:5px 0 0}
  .menu-toggle{display:block}
  .hero-grid,.about-grid,.contact-grid{grid-template-columns:1fr}
  .hero{padding-top:68px}
  .service-grid{grid-template-columns:repeat(2,1fr)}
  .process-grid{grid-template-columns:repeat(3,1fr);gap:18px}
  .process-step:not(:last-child):after{display:none}
  .article-list{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:650px){
  .container{width:min(100% - 28px,1180px)}
  section{padding:58px 0}
  .stats,.service-grid,.cases,.quote-grid,.timeline,.help-list,.network-layout,.two-col{grid-template-columns:1fr}
  .about-points,.form-grid{grid-template-columns:1fr}
  .field.full{grid-column:auto}
  .process-grid{grid-template-columns:1fr}
  .article-list{grid-template-columns:1fr 1fr}
  .hero-actions .btn{width:100%}
  .rating{align-items:flex-start;flex-direction:column;gap:8px}
  .price-row{grid-template-columns:1fr;gap:5px}
  .footer-grid{grid-template-columns:1fr;gap:20px}
  .footer-bottom{flex-direction:column}
  .float-contact{right:14px;bottom:15px}
}
@media(prefers-reduced-motion:reduce){
  *,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}
}