*,*::before,*::after{box-sizing:border-box;}
:root{
  --ink:#141220;
  --ink2:#565169;
  --paper:#FAF7F1;
  --card:#FFFFFF;
  --primary:#3A1FE0;
  --primary-soft:#EDEAFE;
  --accent:#E5321A;
  --accent-soft:#FFE7E2;
  --lime:#D2F04B;
  --line:#E5DFD0;
  --shadow:0 10px 30px rgba(20,18,32,.06);
  --radius:18px;
}
html{scroll-behavior:smooth;scroll-padding-top:92px;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.72;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    radial-gradient(900px 520px at 6% -8%, rgba(58,31,224,.11), transparent 70%),
    radial-gradient(820px 480px at 96% 2%, rgba(229,50,26,.10), transparent 70%),
    radial-gradient(960px 620px at 50% 56%, rgba(210,240,75,.18), transparent 74%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;}
a{color:var(--primary);}
h1,h2,h3{line-height:1.26;letter-spacing:-.02em;margin:0;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
.section{padding:70px 0;}
.section--tight{padding:52px 0;}
.eyebrow{display:inline-block;font-size:13px;font-weight:800;letter-spacing:.06em;color:var(--primary);background:var(--primary-soft);padding:6px 14px;border-radius:999px;margin-bottom:16px;}
.section-head{max-width:780px;margin-bottom:34px;}
.section-head h2{font-size:clamp(22px,3.1vw,34px);margin:0 0 14px;}
.section-head p{margin:0;color:var(--ink2);font-size:16px;}
.grid{display:grid;gap:20px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 28px;border-radius:999px;font-size:15px;font-weight:700;text-decoration:none;border:2px solid transparent;cursor:pointer;font-family:inherit;transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease;}
.btn:hover{transform:translateY(-2px);}
.btn:active{transform:translateY(0);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 10px 24px rgba(229,50,26,.28);}
.btn-accent:hover{box-shadow:0 16px 32px rgba(229,50,26,.36);}
.btn-outline{background:#fff;color:var(--ink);border-color:var(--ink);}
.btn-outline:hover{background:var(--ink);color:#fff;}
.btn-lime{background:var(--lime);color:#141220;box-shadow:0 10px 24px rgba(210,240,75,.5);}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 24px rgba(58,31,224,.26);}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease;}
.reveal.is-visible{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  .btn,.card,.case,.cap,.tag-cloud li,.model-cloud span{transition:none;}
}
/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(250,247,241,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);transition:box-shadow .25s ease;}
.site-header.scrolled{box-shadow:0 8px 24px rgba(20,18,32,.08);}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:70px;position:relative;}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:17px;letter-spacing:-.01em;flex:0 0 auto;}
.ai-page-logo{display:block;max-height:40px;width:auto;}
.brand-name{white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:nowrap;}
.nav-links a{padding:8px 11px;border-radius:999px;color:var(--ink2);text-decoration:none;font-size:14px;font-weight:600;white-space:nowrap;transition:color .2s ease,background .2s ease;}
.nav-links a:hover{color:var(--primary);background:rgba(58,31,224,.08);}
.menu-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:12px;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:0;}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .25s ease,opacity .25s ease;}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
@media (max-width:1080px){
  .menu-toggle{display:flex;}
  .nav-links{position:absolute;top:100%;left:-20px;right:-20px;flex-direction:column;align-items:stretch;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 18px 30px rgba(20,18,32,.1);padding:8px 20px 18px;display:none;}
  .nav-links.open{display:flex;}
  .nav-links a{padding:13px 4px;border-bottom:1px solid var(--line);border-radius:0;font-size:15px;}
  .nav-links a:last-child{border-bottom:none;}
}
/* ---------- hero ---------- */
.hero{padding:58px 0 34px;overflow:hidden;}
.hero-inner{display:grid;grid-template-columns:1.06fr .94fr;gap:50px;align-items:center;}
.hero h1{font-size:clamp(29px,4.4vw,50px);margin:0 0 18px;font-weight:800;}
.hero-lead{font-size:16.5px;color:var(--ink2);margin:0 0 28px;max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-tags{list-style:none;display:flex;flex-wrap:wrap;gap:10px;padding:0;margin:26px 0 0;}
.hero-tags li{font-size:13px;font-weight:700;color:var(--ink2);background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 14px;}
.hero-panel{
  background:linear-gradient(#fff,#fff) padding-box,linear-gradient(135deg,var(--primary),var(--accent) 55%,var(--lime)) border-box;
  border:2px solid transparent;border-radius:24px;padding:22px;box-shadow:0 24px 60px rgba(20,18,32,.1);
}
.panel-head{display:flex;align-items:center;gap:8px;margin-bottom:18px;}
.dot{display:block;width:9px;height:9px;border-radius:50%;background:var(--line);}
.dot:nth-of-type(1){background:#FF6B52;}
.dot:nth-of-type(2){background:var(--lime);}
.dot:nth-of-type(3){background:var(--primary);}
.panel-title{font-size:13px;font-weight:800;color:var(--ink2);margin-left:6px;letter-spacing:.04em;}
.model-cloud{display:flex;flex-wrap:wrap;gap:8px;}
.model-cloud span{font-size:13px;font-weight:700;padding:7px 12px;border-radius:10px;background:#F4F1FA;color:#34287D;border:1px solid #E7E2F7;transition:transform .2s ease,background .2s ease,color .2s ease,border-color .2s ease;}
.model-cloud span:hover{background:var(--primary);color:#fff;border-color:var(--primary);transform:translateY(-2px);}
.panel-foot{margin-top:18px;padding-top:14px;border-top:1px dashed var(--line);font-size:13px;color:var(--ink2);}
@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:34px;}
  .hero{padding-top:40px;}
}
/* ---------- metrics ---------- */
.metrics{padding:6px 0 0;}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;background:#fff;border:1px solid var(--line);border-radius:24px;padding:26px 22px;box-shadow:var(--shadow);}
.metric{text-align:center;}
.metric strong{display:block;font-size:clamp(24px,3vw,34px);letter-spacing:-.03em;color:var(--primary);line-height:1.2;}
.metric span{font-size:13.5px;color:var(--ink2);}
@media (max-width:760px){.metrics-grid{grid-template-columns:repeat(2,1fr);gap:22px;padding:22px 16px;}}
/* ---------- cards ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;display:flex;flex-direction:column;}
.card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(20,18,32,.1);border-color:rgba(58,31,224,.28);}
.card h3{font-size:17px;margin:0 0 10px;}
.card p{margin:0;color:var(--ink2);font-size:14.5px;}
.card-tag{font-size:12px;font-weight:800;color:var(--accent);letter-spacing:.06em;margin-bottom:10px;display:block;}
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:32px;}
.cap{background:#fff;border:1px solid var(--line);border-left:4px solid var(--primary);border-radius:16px;padding:20px;box-shadow:var(--shadow);}
.cap h3{font-size:16px;margin:0 0 8px;}
.cap p{margin:0;font-size:14px;color:var(--ink2);}
.cap:nth-child(3n+1){border-left-color:var(--primary);}
.cap:nth-child(3n+2){border-left-color:var(--accent);}
.cap:nth-child(3n+3){border-left-color:#9BC70C;}
@media (max-width:900px){.cap-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:640px){.cap-grid{grid-template-columns:1fr;}}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;padding:0;list-style:none;}
.tag-cloud li{font-size:13px;font-weight:600;padding:8px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--ink2);transition:transform .2s ease,border-color .2s ease,color .2s ease,background .2s ease;}
.tag-cloud li:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-soft);transform:translateY(-2px);}
/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:8px;}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;box-shadow:var(--shadow);}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:12px;background:var(--ink);color:var(--lime);font-weight:800;font-size:15px;margin-bottom:14px;}
.step h3{font-size:16px;margin:0 0 8px;}
.step p{margin:0;font-size:14px;color:var(--ink2);}
.step:nth-child(2) .step-num{background:var(--primary);color:#fff;}
.step:nth-child(3) .step-num{background:var(--accent);color:#fff;}
.step:nth-child(4) .step-num{background:var(--lime);color:var(--ink);}
@media (max-width:900px){.steps{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.steps{grid-template-columns:1fr;}}
/* ---------- timeline ---------- */
.timeline{position:relative;margin-top:8px;padding-left:30px;}
.timeline::before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,var(--primary),var(--accent));border-radius:2px;}
.tl-item{position:relative;padding-bottom:26px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{content:"";position:absolute;left:-30px;top:6px;width:16px;height:16px;border-radius:50%;background:#fff;border:3px solid var(--primary);}
.tl-item:nth-child(2)::before{border-color:var(--accent);}
.tl-item:nth-child(3)::before{border-color:#9BC70C;}
.tl-item:nth-child(4)::before{border-color:var(--primary);}
.tl-item:nth-child(5)::before{border-color:var(--accent);}
.tl-item h3{font-size:16.5px;margin:0 0 6px;}
.tl-item p{margin:0;font-size:14.5px;color:var(--ink2);}
/* ---------- cases ---------- */
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;}
.case:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(20,18,32,.1);border-color:rgba(58,31,224,.28);}
.case-media{aspect-ratio:16/10;overflow:hidden;background:#EFEBE0;}
.case-media img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s ease;}
.case:hover .case-media img{transform:scale(1.04);}
.case-body{padding:18px 20px;}
.case-body h3{font-size:16px;margin:0 0 6px;}
.case-body p{margin:0;font-size:14px;color:var(--ink2);}
@media (max-width:720px){.case-grid{grid-template-columns:1fr;}}
/* ---------- score & table ---------- */
.score-card{display:flex;align-items:center;gap:26px;flex-wrap:wrap;background:linear-gradient(135deg,#16112E,#291C7A 58%,#3A1FE0);color:#fff;border-radius:24px;padding:26px 30px;box-shadow:0 22px 48px rgba(58,31,224,.28);}
.score-num{font-size:46px;font-weight:800;line-height:1;letter-spacing:-.03em;}
.score-num small{font-size:17px;font-weight:600;opacity:.75;margin-left:4px;}
.score-info{display:flex;flex-direction:column;gap:6px;}
.stars{color:var(--lime);font-size:18px;letter-spacing:3px;line-height:1;}
.score-info strong{font-size:15px;font-weight:800;}
.score-info span{font-size:13.5px;color:#D6D1F5;}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:16px;background:#fff;margin-top:24px;}
table{width:100%;border-collapse:collapse;min-width:680px;font-size:14.5px;}
thead th{background:#F4F1FA;color:var(--ink);text-align:left;padding:14px 16px;font-weight:800;white-space:nowrap;}
tbody td{padding:13px 16px;border-top:1px solid var(--line);color:var(--ink2);vertical-align:top;}
tbody td:first-child{color:var(--ink);font-weight:700;}
tbody tr:hover{background:#FBFAF5;}
td.best{background:#F7F5FF;color:var(--ink);font-weight:700;}
th.best{background:#E7E2FF;color:#241A78;}
.table-note{font-size:13px;color:var(--ink2);margin:12px 0 0;}
/* ---------- quotes ---------- */
.quote-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);display:flex;flex-direction:column;justify-content:space-between;}
.quote-card blockquote{margin:0 0 18px;font-size:14.8px;color:var(--ink2);}
.quote-meta{display:flex;align-items:center;gap:10px;}
.avatar{width:38px;height:38px;border-radius:50%;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;flex:0 0 auto;}
.quote-meta strong{display:block;font-size:14px;}
.quote-meta span{font-size:12.5px;color:var(--ink2);}
/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:24px;align-items:start;}
.article-list{list-style:none;padding:0;margin:0;display:grid;gap:12px;}
.article-list a{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:14px;text-decoration:none;color:var(--ink);font-weight:700;font-size:15px;transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;}
.article-list a:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:0 12px 26px rgba(58,31,224,.1);}
.article-list span{font-size:12.5px;color:var(--ink2);font-weight:600;white-space:nowrap;}
.side-panel{background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:var(--shadow);}
.side-panel h3{font-size:16px;margin:0 0 12px;}
.side-panel p{margin:0 0 16px;font-size:14px;color:var(--ink2);}
@media (max-width:900px){.news-grid{grid-template-columns:1fr;}}
/* ---------- form ---------- */
.form-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:30px;box-shadow:var(--shadow);}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1/-1;}
.field label{font-size:13.5px;font-weight:700;color:var(--ink);}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:12px;font-size:14.5px;font-family:inherit;color:var(--ink);background:#FBFAF6;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px rgba(58,31,224,.12);}
.field textarea{min-height:122px;resize:vertical;}
.form-actions{margin-top:22px;display:flex;align-items:center;gap:16px;flex-wrap:wrap;}
.form-actions small{font-size:13px;color:var(--ink2);}
@media (max-width:640px){.form-grid{grid-template-columns:1fr;}.form-card{padding:22px;}}
/* ---------- faq ---------- */
.faq-list{display:grid;gap:12px;margin-top:8px;}
details.faq{background:#fff;border:1px solid var(--line);border-radius:14px;transition:border-color .2s ease,box-shadow .2s ease;}
details.faq[open]{border-color:var(--primary);box-shadow:0 12px 26px rgba(58,31,224,.08);}
details.faq summary{cursor:pointer;list-style:none;padding:16px 20px;font-weight:700;font-size:15px;display:flex;align-items:center;justify-content:space-between;gap:16px;}
details.faq summary::-webkit-details-marker{display:none;}
details.faq summary::after{content:"+";font-size:20px;color:var(--primary);font-weight:700;line-height:1;flex:0 0 auto;}
details.faq[open] summary::after{content:"−";}
details.faq p{margin:0;padding:0 20px 18px;color:var(--ink2);font-size:14.5px;}
/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:start;}
.contact-list{list-style:none;margin:0;padding:0;display:grid;gap:12px;}
.contact-list li{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 18px;display:flex;gap:14px;align-items:baseline;flex-wrap:wrap;}
.contact-list b{font-size:13px;color:var(--ink2);font-weight:700;min-width:92px;}
.contact-list span{font-size:15px;font-weight:700;color:var(--ink);word-break:break-all;}
.qr-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px;text-align:center;box-shadow:var(--shadow);}
.qr-card img{display:block;width:100%;max-width:180px;height:auto;margin:0 auto 12px;border-radius:12px;}
.qr-card strong{display:block;font-size:15px;margin-bottom:4px;}
.qr-card small{font-size:13px;color:var(--ink2);}
@media (max-width:860px){.contact-grid{grid-template-columns:1fr;}}
/* ---------- join ---------- */
.join-band{background:linear-gradient(120deg,#16112E,#241A5E 56%,#3A1FE0);border-radius:26px;padding:38px 36px;color:#fff;display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;box-shadow:0 24px 52px rgba(30,20,90,.3);}
.join-band h2{font-size:clamp(20px,2.6vw,28px);margin:0 0 10px;}
.join-band p{margin:0;font-size:14.5px;color:#D6D1F5;max-width:620px;}
@media (max-width:640px){.join-band{padding:28px 22px;}}
/* ---------- footer ---------- */
.site-footer{background:#141220;color:#CFC9DE;padding:48px 0 26px;margin-top:16px;}
.site-footer a{color:#EAE6F6;text-decoration:none;transition:color .2s ease;}
.site-footer a:hover{color:var(--lime);}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.12);}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px;font-weight:800;font-size:17px;color:#fff;}
.footer-top p{margin:0;font-size:13.5px;color:#B4AEC8;line-height:1.8;}
.footer-col h3{font-size:14px;color:#fff;margin:0 0 14px;letter-spacing:.04em;}
.footer-col ul{list-style:none;padding:0;margin:0;display:grid;gap:10px;}
.footer-col li{font-size:13.5px;color:#B4AEC8;}
.footer-links{display:flex;flex-wrap:wrap;gap:10px 20px;padding:22px 0;border-bottom:1px solid rgba(255,255,255,.12);}
.footer-links a{font-size:13.5px;}
.footer-links span{font-size:13.5px;color:#8F88A8;}
.copyright{padding-top:20px;font-size:13px;color:#8F88A8;display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:space-between;}
@media (max-width:820px){.footer-top{grid-template-columns:1fr;gap:24px;}}
/* ---------- floating ---------- */
.float-support{position:fixed;right:18px;bottom:76px;z-index:80;}
.support-btn{width:54px;height:54px;border-radius:50%;background:var(--primary);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;letter-spacing:.02em;box-shadow:0 12px 28px rgba(58,31,224,.42);font-family:inherit;transition:transform .2s ease;}
.support-btn:hover{transform:translateY(-3px);}
.support-pop{position:absolute;right:0;bottom:64px;width:220px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;box-shadow:0 18px 40px rgba(20,18,32,.18);display:none;}
.support-pop.open{display:block;}
.support-pop img{display:block;width:100%;height:auto;border-radius:10px;margin-bottom:10px;}
.support-pop p{margin:0;font-size:13px;color:var(--ink2);text-align:center;}
.back-top{position:fixed;right:18px;bottom:18px;z-index:80;width:46px;height:46px;border-radius:50%;background:#fff;border:1px solid var(--line);color:var(--ink);cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:opacity .25s ease,transform .25s ease;font-family:inherit;}
.back-top.show{opacity:1;pointer-events:auto;}
.back-top:hover{transform:translateY(-3px);}