:root{
  --red:#d92332;
  --red-dark:#a91222;
  --red-soft:#fff0f1;
  --ink:#17191d;
  --muted:#66707c;
  --line:#eadfe0;
  --paper:#fffafa;
  --white:#fff;
  --gold:#c6953d;
  --green:#198c66;
  --shadow:0 16px 40px rgba(71,24,28,.09);
  --radius:12px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--ink);
  background:var(--paper);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
  line-height:1.7;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
button,input,select,textarea{font:inherit}
.container{width:min(1180px,calc(100% - 36px));margin:0 auto}
.site-header{
  position:sticky;top:0;z-index:20;
  background:rgba(255,250,250,.96);
  border-bottom:1px solid rgba(217,35,50,.12);
  backdrop-filter:blur(12px);
}
.navbar{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:11px;min-width:150px}
.ai-page-logo{width:42px;max-height:42px;object-fit:contain}
.brand-name{font-weight:800;font-size:18px;letter-spacing:0}
.nav-links{display:flex;align-items:center;gap:0;justify-content:flex-end;flex-wrap:wrap}
.nav-links a{font-size:13px;color:#464b52;padding:8px 10px;transition:.2s}
.nav-links a:hover{color:var(--red)}
.nav-cta,.primary-btn,.outline-btn,.small-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  border:0;cursor:pointer;border-radius:7px;font-weight:700;transition:.25s;
}
.nav-cta{padding:10px 15px;background:var(--red);color:#fff;margin-left:8px;font-size:13px}
.nav-cta:hover,.primary-btn:hover{background:var(--red-dark);transform:translateY(-2px)}
.menu-toggle{display:none;background:none;border:0;font-size:25px;color:var(--ink)}
.hero{
  position:relative;overflow:hidden;
  background:#fff5f5;
  border-bottom:1px solid #f1d9db;
}
.hero:before,.hero:after{content:"";position:absolute;pointer-events:none}
.hero:before{width:270px;height:270px;right:-80px;top:38px;border:42px solid rgba(217,35,50,.1);transform:rotate(18deg)}
.hero:after{width:130px;height:130px;left:-50px;bottom:35px;background:rgba(198,149,61,.13);transform:rotate(45deg)}
.hero-grid{min-height:590px;display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:54px;padding:72px 0 82px;position:relative;z-index:1}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--red);font-size:13px;font-weight:800;letter-spacing:1px;margin-bottom:16px}
.eyebrow:before{content:"";width:26px;height:3px;background:var(--red);display:inline-block}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(38px,5vw,68px);line-height:1.12;letter-spacing:-1px;margin-bottom:22px;max-width:680px}
.hero-copy{font-size:18px;color:#4e555d;max-width:610px;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.primary-btn{padding:13px 20px;background:var(--red);color:#fff}
.outline-btn{padding:12px 19px;color:var(--red);border:1px solid var(--red);background:transparent}
.outline-btn:hover{background:var(--red-soft);transform:translateY(-2px)}
.hero-note{display:flex;flex-wrap:wrap;gap:18px;color:#58616b;font-size:13px}
.hero-note span{display:inline-flex;align-items:center;gap:6px}
.hero-note b{color:var(--red)}
.hero-panel{border-left:1px solid rgba(217,35,50,.22);padding-left:38px}
.panel-kicker{font-size:13px;color:var(--red);font-weight:800;margin-bottom:10px}
.panel-title{font-size:30px;line-height:1.25;margin-bottom:22px}
.signal-list{display:grid;gap:12px}
.signal{display:flex;align-items:flex-start;gap:14px;padding:15px 0;border-bottom:1px solid #ecd8d9}
.signal-mark{width:28px;height:28px;display:grid;place-items:center;color:#fff;background:var(--red);border-radius:50%;font-weight:800;flex:none}
.signal strong{display:block;font-size:16px}.signal small{display:block;color:var(--muted);font-size:13px}
.section{padding:92px 0}
.section.tint{background:#fff1f2}
.section.dark{background:#21181a;color:#fff}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:34px}
.section-head h2{font-size:clamp(28px,4vw,44px);line-height:1.2;margin:0;letter-spacing:-.5px}
.section-head p{max-width:540px;color:var(--muted);margin:0}
.dark .section-head p{color:#d8cacc}
.section-label{font-size:12px;color:var(--red);font-weight:800;letter-spacing:1px;text-transform:uppercase;margin-bottom:8px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:-36px;position:relative;z-index:2}
.stat{background:#fff;border:1px solid #f0dfe0;padding:22px 20px;box-shadow:var(--shadow);border-radius:8px}
.stat strong{font-size:32px;color:var(--red);display:block;line-height:1.15}.stat span{color:var(--muted);font-size:13px}
.about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:58px;align-items:start}
.about-lead{font-size:23px;line-height:1.5;font-weight:700}
.about-text{color:var(--muted)}
.about-points{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.point{border-left:3px solid var(--red);padding:5px 0 5px 16px}.point strong{display:block;margin-bottom:4px}.point span{font-size:13px;color:var(--muted)}
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.service{background:#fff;border:1px solid var(--line);padding:23px 20px;border-radius:9px;transition:.25s}
.service:hover,.review:hover,.case:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#efb9bd}
.service-icon{font-size:23px;color:var(--red);margin-bottom:14px}
.service h3{font-size:18px;margin-bottom:8px}.service p{font-size:13px;color:var(--muted);margin:0}
.feature-band{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center}
.feature-copy h2{font-size:clamp(28px,4vw,43px);line-height:1.25;margin-bottom:16px}
.feature-copy p{color:var(--muted)}
.workflow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:2px solid #e5b9bc}
.step{position:relative;padding:25px 18px 0 0}.step:not(:last-child){border-right:1px solid var(--line);margin-right:18px}
.step-no{display:inline-grid;place-items:center;width:32px;height:32px;background:var(--red);color:#fff;border-radius:50%;font-weight:800;margin-bottom:14px}
.step h3{font-size:17px;margin-bottom:7px}.step p{font-size:13px;color:var(--muted);padding-right:14px}
.industry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
.industry{padding:22px;background:#fff;border-top:3px solid var(--red);box-shadow:0 6px 20px rgba(80,20,25,.05)}
.industry h3{font-size:18px;margin-bottom:8px}.industry p{font-size:13px;color:var(--muted);margin:0}
.network{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}
.network span,.tag-cloud span{padding:7px 12px;background:#fff;border:1px solid #efcccf;color:#5d3b3e;border-radius:5px;font-size:13px}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
.tag-cloud span:nth-child(3n){color:var(--red)}
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.case{background:#fff;border:1px solid var(--line);border-radius:9px;overflow:hidden;transition:.25s}
.case-media{background:#f6e7e7;padding:14px}.case-media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.case-body{padding:19px}.case-body h3{margin-bottom:7px}.case-body p{color:var(--muted);font-size:13px;margin:0}
.table-wrap{overflow-x:auto;border:1px solid var(--line);background:#fff}
table{width:100%;border-collapse:collapse;min-width:760px}
th,td{padding:16px 17px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}
th{background:#fff0f1;color:#5d252a;font-weight:800}td:first-child{font-weight:700;width:22%}.yes{color:var(--green);font-weight:800}.rating{display:flex;align-items:center;gap:20px;margin-bottom:22px}.rating strong{font-size:46px;color:var(--red);line-height:1}.stars{color:var(--gold);font-size:25px;letter-spacing:2px}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.review{background:#fff;border:1px solid var(--line);padding:22px;border-radius:9px;transition:.25s}
.review p{font-size:14px;color:#4d555d;margin-bottom:17px}.review cite{font-style:normal;font-size:13px;font-weight:800}.review cite span{display:block;color:var(--muted);font-weight:400}
.article-layout{display:grid;grid-template-columns:1fr .8fr;gap:22px}.article-list{display:grid;gap:10px}
.article{display:flex;justify-content:space-between;gap:18px;padding:18px 20px;background:#fff;border:1px solid var(--line);border-radius:7px}
.article strong{font-size:15px}.article span{color:var(--red);font-size:13px;white-space:nowrap}
.help-panel{background:#26191b;color:#fff;padding:29px;border-radius:9px}.help-panel h3{font-size:23px}.help-panel p{color:#dbcdd0;font-size:14px}.help-panel a{color:#fff;border-bottom:1px solid #e39ca2}
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 18px}
details{background:#fff;border:1px solid var(--line);border-radius:7px;padding:16px 18px}
summary{cursor:pointer;font-weight:700;padding-right:18px;position:relative}
details p{color:var(--muted);font-size:13px;margin:11px 0 0}
.contact-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:40px;align-items:start}
.contact-info{padding-top:5px}.contact-info h2{font-size:36px;line-height:1.25}.contact-info p{color:var(--muted)}
.contact-list{display:grid;gap:10px;margin-top:25px}.contact-list div{font-size:14px}.contact-list b{display:inline-block;width:88px;color:var(--red)}
form{background:#fff;border:1px solid var(--line);padding:26px;border-radius:9px;box-shadow:var(--shadow)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.field{display:grid;gap:6px}.field.full{grid-column:1/-1}.field label{font-size:13px;font-weight:700}.field input,.field select,.field textarea{width:100%;border:1px solid #dfcfd0;border-radius:5px;padding:11px 12px;outline:none;background:#fffdfd;color:var(--ink)}.field textarea{min-height:120px;resize:vertical}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--red);box-shadow:0 0 0 3px rgba(217,35,50,.1)}
.join{background:#fff0f1}.join-box{display:flex;align-items:center;justify-content:space-between;gap:28px}.join-box h2{font-size:34px;margin:0 0 8px}.join-box p{color:var(--muted);margin:0}
.site-footer{background:#24191b;color:#fff;padding:44px 0 24px}.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:36px}.site-footer h3{font-size:16px;margin-bottom:13px}.site-footer p,.site-footer a{color:#d9c9cb;font-size:13px}.footer-links{display:flex;flex-wrap:wrap;gap:8px 18px}.qr{width:105px;border:5px solid #fff;background:#fff}.copyright{border-top:1px solid #4d373a;margin-top:30px;padding-top:18px;color:#ae989b;font-size:12px}
.floating{position:fixed;right:20px;bottom:20px;z-index:15;display:flex;flex-direction:column;gap:9px}.float-btn{width:48px;height:48px;border-radius:50%;border:1px solid #f0c5c8;background:#fff;color:var(--red);display:grid;place-items:center;box-shadow:0 8px 20px rgba(50,12,16,.14);font-size:20px;cursor:pointer}.float-btn:hover{background:var(--red);color:#fff}
.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 6px;font-size:12px}.service-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:800px){
  .container{width:min(100% - 28px,620px)}.navbar{min-height:66px}.menu-toggle{display:block}.nav-links{display:none;position:absolute;left:14px;right:14px;top:66px;background:#fffafa;border:1px solid var(--line);padding:9px;box-shadow:var(--shadow);align-items:stretch}.nav-links.open{display:flex;flex-direction:column}.nav-links a{padding:10px 12px}.nav-cta{margin:5px 0 0;text-align:center}.hero-grid,.about-grid,.feature-band,.contact-grid,.article-layout{grid-template-columns:1fr;gap:30px}.hero-grid{min-height:auto;padding:58px 0 68px}.hero-panel{border-left:0;border-top:1px solid rgba(217,35,50,.22);padding:27px 0 0}.stats{grid-template-columns:repeat(2,1fr);margin-top:-20px}.section{padding:65px 0}.section-head{display:block}.section-head h2{margin-bottom:12px}.workflow{grid-template-columns:1fr;gap:0;border-top:0;border-left:2px solid #e5b9bc;margin-left:8px}.step{padding:0 0 25px 22px}.step:not(:last-child){border-right:0;margin-right:0}.industry-grid,.cases,.review-grid{grid-template-columns:1fr 1fr}.faq-grid{grid-template-columns:1fr}.join-box{display:block}.join-box .primary-btn{margin-top:20px}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){
  h1{font-size:39px}.hero-copy{font-size:16px}.stats,.service-grid,.industry-grid,.cases,.review-grid,.about-points{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.footer-grid{grid-template-columns:1fr}.section-head h2{font-size:31px}.floating{right:12px;bottom:12px}
}