:root{
  --primary: rgb(70,139,223);
  --primary-dark: #245fbd;
  --primary-soft: #eaf3ff;
  --ink: #102033;
  --muted: #607086;
  --line: #dbe8f7;
  --card: rgba(255,255,255,.88);
  --bg: #f7fbff;
  --shadow: 0 18px 50px rgba(43,92,155,.10);
  --radius: 24px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  color:var(--ink);
  background:
    radial-gradient(circle at 18% 0%, rgba(70,139,223,.16), transparent 30%),
    linear-gradient(180deg,#fbfdff 0%,#f4f9ff 42%,#ffffff 100%);
  line-height:1.78;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.site-header{
  position:sticky;top:0;z-index:20;
  background:rgba(255,255,255,.84);
  backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(219,232,247,.8);
}
.header-inner,.footer-inner,.container{
  width:min(1120px,calc(100% - 32px));
  margin:0 auto;
}
.header-inner{
  min-height:68px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.02em}
.brand-logo{width:34px;height:34px;border-radius:12px}
.brand-text{font-size:18px;color:#132944}
.nav-toggle{
  border:1px solid var(--line);background:#fff;color:var(--ink);
  width:42px;height:42px;border-radius:14px;font-size:20px;
}
.site-nav{
  display:none;position:absolute;left:16px;right:16px;top:70px;
  padding:12px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);
}
.site-nav.is-open{display:grid;gap:6px}
.site-nav a{padding:10px 12px;border-radius:12px;color:#41536a;font-size:14px}
.site-nav a:hover{background:var(--primary-soft);color:var(--primary-dark)}
section{padding:54px 0}
.eyebrow,.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;border-radius:999px;
  background:var(--primary-soft);color:var(--primary-dark);
  font-size:13px;font-weight:700;
}
.centered-hero{
  padding:76px 0 36px;text-align:center;
}
.hero-inner{width:min(880px,calc(100% - 32px));margin:0 auto}
h1{
  margin:18px 0 16px;
  font-size:clamp(34px,8vw,68px);
  line-height:1.08;letter-spacing:-.045em;
}
.page-hero h1{font-size:clamp(30px,7vw,52px)}
.lead{font-size:18px;color:var(--muted);max-width:760px;margin:0 auto 24px}
.download-btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:48px;padding:0 24px;border-radius:999px;
  background:var(--primary);color:#fff!important;font-weight:800;
  box-shadow:0 12px 28px rgba(70,139,223,.26);
  transition:transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(70,139,223,.32);background:var(--primary-dark)}
.hero-tags{margin:18px auto 0;display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.hero-tags span,.mini-tag{
  border:1px solid var(--line);background:rgba(255,255,255,.76);color:#496078;
  border-radius:999px;padding:7px 12px;font-size:13px;
}
.product-bento{
  width:min(1040px,calc(100% - 32px));margin:26px auto 0;
  display:grid;gap:16px;
}
.product-main-card,.status-card,.card,.feature-card,.category-card,.scenario-card,.principle-card,.faq-card,.doc-card,.step-card,.download-panel{
  background:var(--card);border:1px solid rgba(219,232,247,.9);border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.product-main-card{
  position:relative;overflow:hidden;padding:22px;min-height:390px;
  background:linear-gradient(145deg,#fff 0%,#eef7ff 100%);
}
.product-main-card:before{
  content:"";position:absolute;inset:auto -40px -90px -40px;height:230px;
  background:radial-gradient(circle,rgba(70,139,223,.22),transparent 65%);
}
.app-visual{position:relative;z-index:1;width:min(310px,86%);margin:0 auto;filter:drop-shadow(0 22px 35px rgba(34,72,125,.18))}
.status-grid{display:grid;gap:16px}
.status-card{padding:18px}
.status-card strong,.card h3,.feature-card h3,.category-card h3,.scenario-card h3,.principle-card h3{display:block;margin-bottom:8px;color:#152a43}
.status-card p,.card p,.feature-card p,.category-card p,.scenario-card p,.principle-card p{margin:0;color:var(--muted);font-size:15px}
.section-head{margin-bottom:24px}
.section-head h2{font-size:clamp(26px,5vw,40px);line-height:1.15;margin:12px 0 10px;letter-spacing:-.03em}
.section-head p{color:var(--muted);margin:0;max-width:760px}
.capability-grid,.scenario-grid,.faq-grid,.cards-grid{display:grid;gap:16px}
.card{padding:22px}
.card-icon{width:38px;height:38px;border-radius:14px;background:var(--primary-soft);color:var(--primary-dark);display:grid;place-items:center;font-weight:800;margin-bottom:14px}
.roadmap{display:grid;gap:14px;counter-reset:step}
.roadmap-item{
  position:relative;padding:20px 20px 20px 72px;border-radius:22px;
  background:#fff;border:1px solid var(--line);box-shadow:0 10px 30px rgba(43,92,155,.07);
}
.roadmap-item:before{
  counter-increment:step;content:counter(step);
  position:absolute;left:20px;top:20px;width:34px;height:34px;border-radius:13px;
  background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:800;
}
.roadmap-item h3{margin:0 0 6px;font-size:17px}
.roadmap-item p{margin:0 0 10px;color:var(--muted);font-size:14px}
.text-link{color:var(--primary-dark);font-weight:800}
.category-bento,.bento-grid{display:grid;gap:16px}
.category-card,.feature-card{padding:22px;position:relative;overflow:hidden}
.category-card:after,.feature-card:after{
  content:"";position:absolute;right:-42px;bottom:-54px;width:130px;height:130px;border-radius:50%;background:rgba(70,139,223,.08);
}
.feature-card.big{background:linear-gradient(145deg,#fff,#eef7ff)}
.feature-card.small{min-height:150px}
.security-layout{display:grid;gap:22px;align-items:center}
.security-copy{padding:4px}
.security-copy h2{font-size:clamp(26px,5vw,42px);line-height:1.16;letter-spacing:-.03em;margin:12px 0}
.security-copy p{color:var(--muted)}
.principle-list{display:grid;gap:12px}
.principle-card{padding:18px}
.scenario-card{padding:20px}
.faq-card{padding:0;overflow:hidden}
.faq-card details{padding:18px 20px;border-bottom:1px solid var(--line)}
.faq-card details:last-child{border-bottom:none}
.faq-card summary{cursor:pointer;font-weight:800;color:#17304e}
.faq-card p{margin:10px 0 0;color:var(--muted)}
.cta-section{padding:54px 0 74px}
.download-panel{
  text-align:center;padding:34px 22px;
  background:linear-gradient(145deg,#ffffff 0%,#edf6ff 100%);
}
.download-panel h2{font-size:clamp(26px,5vw,42px);margin:0 0 12px;letter-spacing:-.03em}
.download-panel p{max-width:680px;margin:0 auto 22px;color:var(--muted)}
.page-hero{padding:54px 0 24px}
.page-hero .container{display:grid;gap:14px}
.doc-layout{width:min(1040px,calc(100% - 32px));margin:0 auto 58px;display:grid;gap:20px;align-items:start}
.article{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:var(--shadow)}
.article h2{font-size:24px;line-height:1.25;margin:30px 0 12px}
.article h2:first-child{margin-top:0}
.article p{color:#52657c;margin:0 0 16px}
.article ul,.article ol{padding-left:22px;color:#52657c}
.article li{margin:8px 0}
.article .download-wrap{margin-top:26px;padding-top:22px;border-top:1px solid var(--line)}
.side-panel{display:grid;gap:14px}
.doc-card{padding:20px}
.doc-card h3{margin:0 0 10px}
.doc-card p,.doc-card li{color:var(--muted);font-size:14px}
.step-list{display:grid;gap:12px;margin:20px 0}
.step-card{padding:18px;border-radius:20px;display:grid;gap:6px}
.step-card .num{width:30px;height:30px;border-radius:12px;background:var(--primary-soft);color:var(--primary-dark);display:grid;place-items:center;font-weight:900}
.download-steps{display:grid;gap:12px;margin:24px 0}
.download-step{display:flex;gap:12px;align-items:flex-start;padding:16px;border-radius:18px;background:#f7fbff;border:1px solid var(--line)}
.download-step span{flex:0 0 32px;width:32px;height:32px;border-radius:12px;background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:900}
.about-values{display:grid;gap:16px;margin-top:20px}
.site-footer{padding:34px 0 18px;background:#f6faff;border-top:1px solid var(--line)}
.footer-inner{display:grid;gap:20px}
.footer-brand{display:flex;gap:14px;align-items:flex-start}
.footer-logo{width:38px;height:38px;border-radius:14px}
.footer-brand p{margin:6px 0 0;color:var(--muted);font-size:14px}
.footer-links{display:flex;gap:12px;flex-wrap:wrap}
.footer-links a{color:#496078;background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 12px;font-size:14px}
.footer-bottom{width:min(1120px,calc(100% - 32px));margin:22px auto 0;color:#7a8797;font-size:13px}
.notice{padding:16px;border-radius:18px;background:#f0f7ff;border:1px solid var(--line);color:#435a72}
.two-col{display:grid;gap:16px}
.kv-list{display:grid;gap:10px;margin:18px 0}
.kv-list div{display:flex;gap:10px;padding:12px;border-radius:16px;background:#f8fbff;border:1px solid var(--line)}
.kv-list b{color:var(--primary-dark);min-width:86px}
@media (min-width: 700px){
  .capability-grid,.scenario-grid,.cards-grid{grid-template-columns:repeat(2,1fr)}
  .category-bento{grid-template-columns:repeat(2,1fr)}
  .two-col{grid-template-columns:repeat(2,1fr)}
  .about-values{grid-template-columns:repeat(2,1fr)}
}
@media (min-width: 920px){
  .nav-toggle{display:none}
  .site-nav{display:flex;position:static;align-items:center;gap:2px;padding:0;background:transparent;border:0;box-shadow:none}
  .centered-hero{padding-top:104px}
  .product-bento{grid-template-columns:1.45fr .9fr;align-items:stretch;gap:18px}
  .product-main-card{min-height:500px;display:grid;place-items:center}
  .status-grid{grid-template-rows:repeat(4,1fr)}
  .capability-grid{grid-template-columns:repeat(4,1fr)}
  .roadmap{grid-template-columns:repeat(6,1fr);align-items:stretch}
  .roadmap-item{padding:68px 16px 18px}
  .roadmap-item:before{top:18px;left:16px}
  .roadmap-item:nth-child(even){transform:translateY(28px)}
  .category-bento{grid-template-columns:repeat(4,1fr);grid-auto-rows:minmax(150px,auto)}
  .category-card.large{grid-column:span 2;grid-row:span 2}
  .category-card.wide{grid-column:span 2}
  .bento-grid{grid-template-columns:repeat(4,1fr);grid-auto-rows:minmax(170px,auto)}
  .feature-card.big{grid-column:span 2;grid-row:span 2}
  .feature-card.medium{grid-column:span 2}
  .security-layout{grid-template-columns:1.05fr .95fr}
  .scenario-grid{grid-template-columns:repeat(5,1fr)}
  .scenario-card:nth-child(1),.scenario-card:nth-child(2){grid-column:span 2}
  .scenario-card:nth-child(3){grid-column:span 1}
  .doc-layout{grid-template-columns:minmax(0,1fr) 320px}
  .article{padding:34px}
  .footer-inner{grid-template-columns:1fr auto;align-items:center}
}
@media (max-width: 420px){
  .header-inner,.footer-inner,.container,.doc-layout,.product-bento{width:min(100% - 24px,1120px)}
  .download-btn{width:100%;max-width:320px}
  .hero-tags span{font-size:12px}
  .article{padding:20px}
}