:root{
  --green:#a8df38;
  --green-deep:#4d8d22;
  --green-dark:#18351f;
  --ink:#19251d;
  --muted:#657268;
  --line:#dbe7d9;
  --paper:#f7fbf4;
  --white:#fff;
  --orange:#f1a53a;
  --shadow:0 16px 40px rgba(38,81,42,.09);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,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(247,251,244,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
.navbar{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.ai-page-logo{width:138px}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap;justify-content:flex-end}
.nav-links a{padding:8px 9px;font-size:13px;color:#405546;transition:.2s}
.nav-links a:hover{color:var(--green-deep)}
.nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;cursor:pointer;font-weight:700;transition:transform .2s,box-shadow .2s,background .2s}
.nav-cta{background:var(--green);padding:10px 17px;border-radius:7px;color:var(--green-dark);font-size:13px;white-space:nowrap}
.button{padding:13px 21px;border-radius:7px;background:var(--green);color:var(--green-dark);box-shadow:0 8px 20px rgba(95,145,32,.2)}
.button:hover,.nav-cta:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(95,145,32,.25)}
.button.secondary{background:var(--white);color:var(--green-deep);border:1px solid #c9ddc3;box-shadow:none}
.menu-toggle{display:none;background:none;border:1px solid var(--line);font-size:20px;padding:5px 10px;border-radius:6px;color:var(--green-dark)}
.hero{position:relative;overflow:hidden;background:var(--green-dark);color:#fff;padding:86px 0 72px}
.hero:before,.hero:after{content:"";position:absolute;pointer-events:none;border:1px solid rgba(168,223,56,.35);transform:rotate(22deg)}
.hero:before{width:300px;height:300px;right:-90px;top:-90px;border-radius:38px}
.hero:after{width:180px;height:180px;left:-80px;bottom:-80px;border-radius:50%}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.18fr) minmax(300px,.82fr);gap:60px;align-items:center;position:relative;z-index:1}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-weight:700;font-size:14px;letter-spacing:1px}
.eyebrow:before{content:"";width:26px;height:3px;background:var(--green);border-radius:2px}
h1,h2,h3{line-height:1.25;margin:0 0 16px;color:var(--ink)}
.hero h1{font-size:clamp(36px,5vw,64px);max-width:700px;color:#fff;margin-top:18px}
.hero p{max-width:650px;color:#dbe8d7;font-size:18px;margin:0 0 28px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero .button.secondary{background:transparent;border-color:rgba(255,255,255,.35);color:#fff}
.hero-metrics{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.metric{padding:22px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.08);border-radius:10px}
.metric strong{display:block;color:var(--green);font-size:30px;line-height:1.2}
.metric span{display:block;color:#d9e4d8;font-size:13px;margin-top:7px}
.section{padding:78px 0}
.section.alt{background:#edf6e8}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:34px}
.section-head p{max-width:580px;color:var(--muted);margin:0}
.section-kicker{font-size:13px;color:var(--green-deep);font-weight:800;letter-spacing:1px;text-transform:uppercase}
h2{font-size:clamp(28px,4vw,42px);color:var(--green-dark)}
h3{font-size:20px}
.intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:42px;align-items:start}
.intro-copy p{color:var(--muted);font-size:16px}
.principles{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.principle{padding:20px;background:#fff;border-left:4px solid var(--green);box-shadow:var(--shadow)}
.principle strong{display:block;margin-bottom:5px}
.principle span{font-size:13px;color:var(--muted)}
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.service-card{padding:23px;background:var(--white);border:1px solid var(--line);border-radius:8px;transition:.25s}
.service-card:hover,.review:hover,.case:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.service-icon{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:#e5f5ce;color:var(--green-deep);font-weight:800;margin-bottom:18px}
.service-card p,.case p,.review p{font-size:14px;color:var(--muted);margin:0}
.tag-list{display:flex;flex-wrap:wrap;gap:9px;margin-top:24px}
.tag{border:1px solid #c9dfbf;background:#f7fff0;color:var(--green-deep);padding:7px 12px;border-radius:20px;font-size:13px}
.process{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:2px solid var(--green)}
.step{position:relative;padding:28px 18px 8px;border-right:1px solid var(--line)}
.step:last-child{border-right:0}
.step-number{position:absolute;top:-17px;left:18px;width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:var(--green-dark);color:#fff;font-weight:800}
.step p{color:var(--muted);font-size:14px;margin:0}
.solution-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.solution{background:#fff;padding:25px;border-top:4px solid var(--green);box-shadow:0 8px 22px rgba(36,72,30,.05)}
.solution ul{padding-left:20px;color:var(--muted);font-size:14px;margin:12px 0 0}
.network{display:grid;grid-template-columns:1.2fr .8fr;gap:20px;align-items:stretch}
.network-panel{background:var(--green-dark);color:#fff;padding:32px;border-radius:10px}
.network-panel h3{color:#fff}
.network-panel p{color:#d6e4d3}
.model-cloud{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}
.model-cloud span{padding:7px 11px;border:1px solid rgba(168,223,56,.4);color:#e9f8dd;font-size:13px;border-radius:5px}
.network-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.network-list div{background:#fff;border:1px solid var(--line);padding:18px}
.network-list strong{display:block;color:var(--green-deep);margin-bottom:4px}
.network-list span{font-size:13px;color:var(--muted)}
.compare-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
.compare-table{width:100%;border-collapse:collapse;min-width:760px}
.compare-table th,.compare-table td{padding:17px 18px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}
.compare-table th{background:#e9f6de;color:var(--green-dark)}
.compare-table td:first-child{font-weight:700}
.highlight{color:var(--green-deep);font-weight:700}
.rating{display:flex;align-items:center;gap:18px;margin-bottom:24px}
.rating strong{font-size:42px;color:var(--green-deep)}
.stars{color:#e99b24;letter-spacing:3px;font-size:22px}
.case-grid,.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.case,.review{background:#fff;border:1px solid var(--line);padding:22px;transition:.25s}
.case-media{margin:-22px -22px 20px;aspect-ratio:16/8;overflow:hidden;background:#dcefd0}
.case-media img{width:100%;height:100%;object-fit:cover}
.case-label{font-size:12px;color:var(--green-deep);font-weight:800}
.review{position:relative}
.review:before{content:"“";font-family:Georgia,serif;font-size:64px;line-height:1;color:var(--green);position:absolute;right:18px;top:8px}
.review h3{font-size:16px;margin-bottom:9px;padding-right:30px}
.reviewer{font-size:13px;color:var(--green-deep);font-weight:700;margin-top:16px}
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.article{background:#fff;padding:23px;border-left:3px solid var(--green);border-bottom:1px solid var(--line)}
.article time{font-size:12px;color:var(--muted)}
.article h3{font-size:17px;margin:8px 0}
.article p{font-size:13px;color:var(--muted);margin:0 0 13px}
.text-link{color:var(--green-deep);font-weight:700;font-size:14px}
.match-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:36px;align-items:start}
.match-info{padding:30px;background:var(--green-dark);color:#fff}
.match-info h2,.match-info h3{color:#fff}
.match-info p{color:#d6e4d3}
.match-points{padding:0;list-style:none;margin:22px 0 0}
.match-points li{padding:9px 0;border-bottom:1px solid rgba(255,255,255,.15);color:#edf7e8}
.form-panel{background:#fff;padding:30px;border:1px solid var(--line);box-shadow:var(--shadow)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
label{font-size:13px;font-weight:700;color:var(--green-dark)}
input,select,textarea{font:inherit;border:1px solid #cddccc;border-radius:5px;padding:12px 13px;background:#fbfef9;color:var(--ink);outline:none}
input:focus,select:focus,textarea:focus{border-color:var(--green-deep);box-shadow:0 0 0 3px rgba(168,223,56,.2)}
textarea{min-height:120px;resize:vertical}
.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
details{background:#fff;border:1px solid var(--line);padding:17px 19px}
summary{cursor:pointer;font-weight:700;color:var(--green-dark);list-style:none;padding-right:20px;position:relative}
summary:after{content:"+";position:absolute;right:0;color:var(--green-deep);font-size:20px;top:-4px}
details[open] summary:after{content:"−"}
details p{color:var(--muted);font-size:14px;margin:12px 0 0}
.about-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);margin-top:30px}
.about-strip div{background:#fff;padding:22px}
.about-strip strong{display:block;color:var(--green-deep);font-size:22px}
.about-strip span{font-size:13px;color:var(--muted)}
.footer{background:#18351f;color:#d9e7d5;padding:48px 0 22px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.footer h3{color:#fff;font-size:17px}
.footer p,.footer a{font-size:13px;color:#c5d8c0}
.footer a:hover{color:var(--green)}
.footer-links{display:grid;gap:5px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.16);margin-top:35px;padding-top:18px;font-size:12px;color:#a9bea5;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
.kefu{position:fixed;right:20px;bottom:22px;z-index:15;width:54px;height:54px;border-radius:50%;background:var(--green);color:var(--green-dark);display:grid;place-items:center;font-weight:800;box-shadow:0 8px 25px rgba(23,57,23,.25);cursor:pointer}
.kefu-panel{display:none;position:fixed;right:20px;bottom:86px;width:210px;background:#fff;padding:14px;border:1px solid var(--line);box-shadow:var(--shadow);z-index:15}
.kefu-panel.show{display:block}
.kefu-panel img{width:160px;margin:8px auto}
.kefu-panel p{font-size:13px;color:var(--muted);margin:4px 0;text-align:center}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s ease}
.reveal.visible{opacity:1;transform:none}
@media(max-width:1050px){
  .nav-links a{padding:8px 5px;font-size:12px}
  .service-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:800px){
  .container{width:min(100% - 28px,620px)}
  .navbar{min-height:68px}
  .menu-toggle{display:block}
  .nav-links{display:none;position:absolute;left:14px;right:14px;top:68px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);padding:10px;flex-direction:column;align-items:stretch}
  .nav-links.open{display:flex}
  .nav-links a{padding:10px 12px;border-bottom:1px solid #eef4eb}
  .nav-cta{display:none}
  .hero{padding:65px 0 55px}
  .hero-grid,.intro-grid,.network,.match-grid{grid-template-columns:1fr;gap:30px}
  .hero h1{font-size:39px}
  .section{padding:58px 0}
  .section-head{display:block}
  .section-head p{margin-top:12px}
  .process{grid-template-columns:1fr;border-top:0;gap:12px}
  .step{border-right:0;border-left:2px solid var(--green);padding:10px 15px 10px 48px}
  .step-number{left:-17px;top:11px}
  .solution-grid,.case-grid,.review-grid,.article-grid{grid-template-columns:1fr}
  .faq-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .about-strip{grid-template-columns:1fr 1fr}
}
@media(max-width:520px){
  .hero h1{font-size:34px}
  .hero p{font-size:16px}
  .hero-metrics,.principles,.network-list,.form-grid{grid-template-columns:1fr}
  .field.full{grid-column:auto}
  .footer-grid{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
  *,html{scroll-behavior:auto!important;transition:none!important;animation:none!important}
}