:root{
  --ink:#171b38;
  --muted:#626984;
  --line:#e6e8f2;
  --paper:#f7f8fc;
  --white:#fff;
  --violet:#6654f6;
  --cyan:#20c7d9;
  --pink:#ed67bb;
  --dark:#11152e;
  --shadow:0 18px 50px rgba(34,31,91,.09);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--paper);font-family:"PingFang SC","Microsoft YaHei",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(255,255,255,.92);border-bottom:1px solid rgba(230,232,242,.85);backdrop-filter:blur(18px)}
.navbar{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;white-space:nowrap}
.ai-page-logo{width:42px;height:42px;object-fit:contain}
.brand-name{font-size:19px;letter-spacing:.04em}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap;justify-content:flex-end}
.nav-links a{font-size:14px;color:#4f5672;padding:8px 11px;transition:.25s}
.nav-links a:hover{color:var(--violet)}
.nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:12px;padding:12px 20px;background:linear-gradient(110deg,var(--violet),#9271ff);color:#fff;font-weight:700;box-shadow:0 10px 24px rgba(102,84,246,.2);transition:transform .25s,box-shadow .25s}
.nav-cta:hover,.button:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(102,84,246,.3)}
.menu-toggle{display:none;background:none;border:0;font-size:25px;color:var(--ink)}
.hero{position:relative;overflow:hidden;background:
 radial-gradient(circle at 80% 18%,rgba(32,199,217,.2),transparent 28%),
 radial-gradient(circle at 16% 18%,rgba(237,103,187,.18),transparent 25%),
 linear-gradient(135deg,#fbfbff 0%,#eef0ff 52%,#f9f7ff 100%);padding:96px 0 80px}
.hero:after{content:"";position:absolute;width:420px;height:420px;border:1px solid rgba(102,84,246,.18);border-radius:50%;right:-130px;bottom:-200px;box-shadow:0 0 0 30px rgba(32,199,217,.05),0 0 0 70px rgba(237,103,187,.04)}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:62px;align-items:center;position:relative;z-index:1}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--violet);font-size:13px;font-weight:800;letter-spacing:.14em;text-transform:uppercase}
.eyebrow:before{content:"";width:26px;height:2px;background:linear-gradient(90deg,var(--pink),var(--cyan))}
h1,h2,h3{line-height:1.25;margin:0 0 18px}
h1{font-size:clamp(38px,6vw,70px);letter-spacing:-.05em;max-width:680px}
h2{font-size:clamp(28px,4vw,44px);letter-spacing:-.035em}
h3{font-size:19px}
.hero-copy{font-size:18px;color:#555d78;max-width:620px;margin:0 0 28px}
.actions{display:flex;gap:13px;flex-wrap:wrap}
.button.secondary{background:#fff;color:var(--violet);border:1px solid #dcd9ff;box-shadow:none}
.hero-panel{background:rgba(255,255,255,.65);border:1px solid rgba(255,255,255,.9);border-radius:28px;padding:25px;box-shadow:var(--shadow);backdrop-filter:blur(14px)}
.signal{display:flex;justify-content:space-between;align-items:center;padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:18px}
.signal strong{font-size:25px}
.signal span{color:var(--muted);font-size:13px}
.orbit{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.orbit-item{padding:16px;border-radius:17px;background:#fff;border:1px solid #ececf7}
.orbit-item b{display:block;font-size:22px;color:var(--violet)}
.orbit-item span{font-size:13px;color:var(--muted)}
.section{padding:88px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:34px}
.section-head p{max-width:520px;color:var(--muted);margin:0}
.metrics{background:#fff;border-bottom:1px solid var(--line);padding:24px 0}
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.metric{padding:12px 20px;border-left:2px solid var(--cyan)}
.metric strong{display:block;font-size:30px;color:var(--violet)}
.metric span{font-size:14px;color:var(--muted)}
.intro{background:#fff}
.intro-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:50px;align-items:start}
.lead{font-size:20px;color:#3e4663}
.feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.feature{padding:20px;border:1px solid var(--line);border-radius:18px;background:linear-gradient(145deg,#fff,#f8f7ff);transition:.3s}
.feature:hover,.service-card:hover,.comment:hover,.case-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.feature b{display:block;margin-bottom:5px}
.feature p{margin:0;color:var(--muted);font-size:14px}
.service-section{background:linear-gradient(180deg,#f7f8fc,#eef0ff)}
.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:20px;transition:.3s}
.service-card .number{color:var(--pink);font-weight:800;font-size:13px}
.service-card p{color:var(--muted);font-size:14px;margin:0}
.tag-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.tag{padding:8px 13px;border-radius:99px;background:#fff;border:1px solid #dedcff;color:#5145b9;font-size:13px}
.workflow{background:var(--dark);color:#fff}
.workflow .section-head p,.workflow .muted{color:#b7bdd8}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.step{position:relative;padding:20px 25px 10px 0;border-top:1px solid rgba(255,255,255,.25)}
.step:not(:last-child):after{content:"→";position:absolute;right:18px;top:22px;color:var(--cyan);font-size:25px}
.step-num{font-size:30px;color:var(--cyan);font-weight:800}
.step p{color:#b7bdd8;font-size:14px}
.solution-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.solution{padding:23px;border-radius:20px;background:#fff;border:1px solid var(--line)}
.solution h3{font-size:18px}
.solution p{font-size:14px;color:var(--muted);margin:0}
.network{background:#fff}
.network-box{display:grid;grid-template-columns:1.1fr .9fr;gap:26px;align-items:stretch}
.model-cloud{padding:30px;border-radius:24px;background:linear-gradient(135deg,#f0efff,#f5ffff);border:1px solid #e3e1ff}
.model-cloud .tag{background:rgba(255,255,255,.85)}
.timeline{padding:8px 0}
.timeline-item{display:flex;gap:18px;padding:0 0 25px}
.timeline-dot{width:14px;height:14px;flex:0 0 14px;margin-top:8px;border-radius:50%;background:var(--pink);box-shadow:0 0 0 6px #ffeaf7}
.timeline-item p{margin:0;color:var(--muted);font-size:14px}
.compare{background:#fff}
.score-card{display:flex;align-items:center;gap:24px;padding:25px;border-radius:20px;background:linear-gradient(120deg,#161a39,#29245f);color:#fff;margin-bottom:25px}
.score{font-size:46px;font-weight:800;color:#f8c75e}
.stars{color:#ffd263;font-size:23px;letter-spacing:3px}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:18px}
table{border-collapse:collapse;width:100%;min-width:760px;background:#fff}
th,td{text-align:left;padding:16px;border-bottom:1px solid var(--line);font-size:14px}
th{background:#f4f3ff;color:#4c42b2}
td:first-child{font-weight:700}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case-card{overflow:hidden;border-radius:20px;background:#fff;border:1px solid var(--line);transition:.3s}
.case-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.case-body{padding:19px}
.case-body p{font-size:14px;color:var(--muted);margin:0}
.comments{background:#f0f1fb}
.comment-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.comment{padding:23px;background:#fff;border-radius:18px;border:1px solid var(--line);transition:.3s}
.comment p{font-size:14px;margin:0 0 16px;color:#4f5672}
.comment strong{font-size:14px}
.comment small{display:block;color:var(--violet);margin-top:4px}
.articles{background:#fff}
.article-list{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.article-list a{padding:18px;border:1px solid var(--line);border-radius:15px;background:#fafaff;color:#414967;font-weight:700;font-size:14px;transition:.25s}
.article-list a:hover{border-color:var(--violet);color:var(--violet)}
.match{background:linear-gradient(135deg,#eceaff,#f1fcfd)}
.contact-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:40px;align-items:start}
.contact-note{padding:28px;border-radius:24px;background:#161a39;color:#fff}
.contact-note p{color:#c4c9df}
.contact-note a{color:#76e5ed}
.form-card{padding:28px;background:#fff;border-radius:24px;box-shadow:var(--shadow)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
label{font-size:14px;font-weight:700}
input,select,textarea{width:100%;border:1px solid #dfe2ee;border-radius:10px;padding:12px 13px;font:inherit;color:var(--ink);background:#fff;outline:none}
input:focus,select:focus,textarea:focus{border-color:var(--violet);box-shadow:0 0 0 3px rgba(102,84,246,.1)}
textarea{min-height:120px;resize:vertical}
.faq{background:#fff}
.faq-list{max-width:900px;margin:0 auto}
details{border-bottom:1px solid var(--line);padding:18px 0}
summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:20px}
summary:after{content:"+";color:var(--violet);font-size:22px}
details[open] summary:after{content:"−"}
details p{color:var(--muted);margin:12px 34px 0 0;font-size:14px}
.join{background:linear-gradient(120deg,#dffaff,#eee9ff);text-align:center}
.join p{color:var(--muted);max-width:600px;margin:0 auto 24px}
.site-footer{background:#11152e;color:#dce1f5;padding:46px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:40px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.14)}
.site-footer h3{font-size:17px;color:#fff}
.site-footer p,.site-footer a{font-size:14px;color:#aeb6d1}
.site-footer a:hover{color:#75e5ee}
.footer-links{display:flex;flex-direction:column;gap:7px}
.copyright{display:flex;justify-content:space-between;gap:20px;padding-top:20px;font-size:13px;color:#8e97b6}
.qr{width:110px;border-radius:8px;margin-top:10px}
.float-contact{position:fixed;right:20px;bottom:22px;z-index:15;display:flex;flex-direction:column;align-items:center;gap:6px}
.float-contact a{width:50px;height:50px;border-radius:50%;display:grid;place-items:center;background:var(--violet);color:#fff;box-shadow:0 10px 25px rgba(102,84,246,.3);font-weight:800}
.float-contact span{font-size:11px;background:#fff;border-radius:8px;padding:2px 6px;color:var(--violet);box-shadow:0 3px 12px rgba(0,0,0,.1)}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}
@media(max-width:980px){
 .nav-links{display:none;position:absolute;top:76px;left:20px;right:20px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
 .nav-links.open{display:flex}.nav-links a{padding:10px 14px}.menu-toggle{display:block}
 .hero-grid,.intro-grid,.network-box,.contact-grid{grid-template-columns:1fr}.hero{padding-top:70px}.service-grid,.solution-grid{grid-template-columns:repeat(2,1fr)}
 .article-list{grid-template-columns:repeat(3,1fr)}.steps{grid-template-columns:repeat(2,1fr);gap:20px}.step:not(:last-child):after{display:none}
}
@media(max-width:640px){
 .container{width:min(100% - 28px,1180px)}.navbar{min-height:68px}.brand-name{font-size:17px}.ai-page-logo{width:36px;height:36px}
 .hero{padding:60px 0}.hero-copy{font-size:16px}h1{font-size:40px}.section{padding:62px 0}.section-head{display:block}.section-head p{margin-top:12px}
 .metric-grid{grid-template-columns:repeat(2,1fr);gap:12px}.metric{padding:8px 12px}.metric strong{font-size:24px}
 .feature-list,.service-grid,.solution-grid,.case-grid,.comment-grid,.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}
 .steps{grid-template-columns:1fr}.article-list{grid-template-columns:1fr 1fr}.score-card{align-items:flex-start;flex-direction:column;gap:4px}
 .footer-grid{grid-template-columns:1fr;gap:22px}.copyright{display:block}.copyright span{display:block;margin-top:8px}.float-contact{right:13px;bottom:14px}
}