:root{
  --paper:#f7f8f4;
  --ink:#171a1f;
  --muted:#596171;
  --line:#dfe4dc;
  --panel:#ffffff;
  --dark:#11151b;
  --blue:#2563eb;
  --green:#0f9f6e;
  --lime:#c9ff3b;
  --amber:#b7791f;
  --rose:#d43f6a;
  --cyan:#0891b2;
  --shadow:0 18px 50px rgba(22,26,31,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
[id]{scroll-margin-top:92px}
.anchor-target{display:block;height:92px;margin-top:-92px;visibility:hidden}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.72;
  letter-spacing:0;
}
a{color:inherit;text-decoration:none}
a:hover{color:var(--blue)}
img,svg,canvas{max-width:100%;display:block}
.skip-link{position:absolute;left:-999px;top:10px;background:#fff;padding:8px 12px;z-index:90}
.skip-link:focus{left:10px}
.site-top{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,248,244,.86);
  border-bottom:1px solid rgba(223,228,220,.8);
  backdrop-filter:blur(18px);
}
.nav-shell{
  width:min(1180px,calc(100% - 40px));
  margin:0 auto;
  min-height:70px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:900}
.brand-logo{
  width:34px;
  height:34px;
  border-radius:9px;
  object-fit:cover;
  box-shadow:0 6px 16px rgba(37,99,235,.14);
}
.brand-mark{
  width:36px;
  height:36px;
  display:grid;
  place-items:center;
  border-radius:8px;
  background:#11151b;
  color:#fff;
  font-weight:900;
}
.brand span:last-child{font-size:18px}
.nav-links{display:flex;align-items:center;gap:4px;color:#3f4756;font-size:14px;font-weight:740}
.nav-links a{padding:8px 10px;border-radius:8px}
.nav-links a:hover,.nav-links a[aria-current="page"]{background:#fff;color:#11151b}
.nav-action{background:#11151b!important;color:#fff!important;padding:9px 13px!important}
.mobile-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 10px;font-weight:800}
.wrap{width:min(1180px,calc(100% - 40px));margin:0 auto}
.hero{
  position:relative;
  min-height:78vh;
  display:grid;
  align-items:start;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background:#eef2ec;
}
#signal-canvas{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  opacity:.78;
}
.hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(247,248,244,.98) 0%,rgba(247,248,244,.91) 46%,rgba(247,248,244,.44) 100%);
}
.hero-grid{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1.02fr .98fr;
  gap:48px;
  align-items:center;
  padding:96px 0 72px;
}
h1,h2,h3,p{overflow-wrap:anywhere}
.no-break{white-space:nowrap}
h1{
  margin:0 0 18px;
  font-size:72px;
  line-height:1.02;
  letter-spacing:0;
  max-width:820px;
  color:#10151d;
}
.lead{max-width:760px;color:#273241;font-size:20px;margin:0}
.plain-note{margin-top:18px;color:#384150;font-size:15px;max-width:760px}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.hero-tags span{
  display:inline-flex;
  align-items:center;
  min-height:30px;
  border:1px solid rgba(17,21,27,.14);
  border-radius:999px;
  background:rgba(255,255,255,.72);
  padding:5px 10px;
  color:#26303d;
  font-size:13px;
  font-weight:850;
}
.hero-product{display:flex;align-items:center;gap:10px;margin-bottom:22px;color:#4d5666;font-weight:800}
.hero-product img{width:38px;height:38px;border-radius:10px;object-fit:cover;box-shadow:0 8px 22px rgba(37,99,235,.14)}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.btn{
  min-height:44px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--line);
  border-radius:8px;
  background:#fff;
  padding:10px 16px;
  font-weight:850;
  color:#11151b;
  transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(22,26,31,.12);color:#11151b}
.btn.primary{background:#11151b;color:#fff;border-color:#11151b}
.btn.ghost{background:rgba(255,255,255,.66)}
.console-board{
  border:1px solid rgba(21,27,35,.14);
  background:rgba(255,255,255,.78);
  box-shadow:var(--shadow);
  border-radius:8px;
  overflow:hidden;
  backdrop-filter:blur(18px);
}
.board-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:13px 14px;
  border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.74);
}
.board-head strong{font-size:15px}
.status-dot{display:inline-flex;align-items:center;gap:7px;color:#20714d;font-size:13px;font-weight:760}
.status-dot::before{content:"";width:8px;height:8px;border-radius:50%;background:#16a34a}
.board-body{padding:18px;display:grid;gap:14px}
.route-row{
  display:grid;
  grid-template-columns:92px 1fr 78px;
  gap:10px;
  align-items:center;
  padding:11px;
  border:1px solid #e4e8e1;
  border-radius:8px;
  background:#fff;
}
.route-row span{color:#667085;font-size:13px}
.route-row strong{font-size:14px}
.route-bar{height:9px;border-radius:999px;background:#e8ece7;overflow:hidden}
.route-bar i{display:block;height:100%;border-radius:999px;background:var(--color,var(--blue));width:var(--w,70%)}
.board-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.metric{border:1px solid #e4e8e1;background:#fff;border-radius:8px;padding:12px}
.metric strong{display:block;font-size:22px;line-height:1.1}
.metric span{display:block;color:#667085;font-size:12px;margin-top:4px}
.section{padding:72px 0;background:#fff;border-bottom:1px solid var(--line)}
.section.paper{background:var(--paper)}
.section.dark{background:#11151b;color:#fff;border-bottom:0}
.section-head{display:grid;grid-template-columns:minmax(0,.9fr) minmax(260px,.55fr);gap:32px;align-items:end;margin-bottom:28px}
.section h2,.page-hero h1{
  margin:0;
  font-size:48px;
  line-height:1.1;
  letter-spacing:0;
}
.section .sub{color:#596171;margin:0}
.dark .sub,.dark .muted{color:#b8c0cc}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.card,.model-card,.article-card,.doc-card,.faq-item{
  border:1px solid var(--line);
  background:#fff;
  border-radius:8px;
  padding:20px;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card:hover,.model-card:hover,.article-card:hover,.doc-card:hover,.faq-item:hover{
  transform:translateY(-3px);
  border-color:#cfd7c9;
  box-shadow:0 18px 34px rgba(22,26,31,.08);
}
.card h3,.model-card h3,.article-card h3,.doc-card h3{margin:0 0 8px;font-size:20px}
.card p,.model-card p,.article-card p,.doc-card p{margin:0;color:#596171}
.card .num{font-size:13px;font-weight:900;color:#fff;background:#11151b;border-radius:6px;padding:4px 7px;display:inline-flex;margin-bottom:12px}
.principle{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.truth-box{
  padding:24px;
  border-radius:8px;
  border:1px solid rgba(255,255,255,.14);
  background:#171d26;
}
.truth-box h3{margin:0 0 10px;color:#fff}
.truth-box p{color:#c9d0dc;margin:0}
.truth-box.good{background:#0f2d25;border-color:rgba(80,220,160,.22)}
.for-list{display:grid;gap:10px}
.for-row{
  display:grid;
  grid-template-columns:190px 1fr;
  gap:16px;
  padding:16px;
  border:1px solid var(--line);
  background:#fff;
  border-radius:8px;
}
.for-row strong{font-size:17px}
.for-row span{color:#596171}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.step{padding:18px;border-radius:8px;background:#fff;border:1px solid var(--line)}
.step small{display:block;color:var(--blue);font-weight:900;margin-bottom:6px}
.step p{margin:0;color:#596171}
.model-tools{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.filter-chip{
  border:1px solid var(--line);
  background:#fff;
  border-radius:8px;
  padding:8px 10px;
  cursor:pointer;
  font-weight:800;
  color:#384150;
}
.filter-chip.active{background:#11151b;color:#fff;border-color:#11151b}
.model-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.model-card{display:flex;flex-direction:column;gap:10px;min-height:220px}
.model-card[data-hidden="true"]{display:none}
.model-top{display:flex;justify-content:space-between;gap:10px;align-items:flex-start}
.provider{color:#667085;font-size:13px;font-weight:800}
.badge{display:inline-flex;width:max-content;border-radius:999px;padding:4px 8px;font-size:12px;font-weight:900;background:#edf2ff;color:#1d4ed8}
.badge.green{background:#e8f7ef;color:#087148}
.badge.amber{background:#fff4db;color:#8a5a00}
.badge.rose{background:#ffeaf0;color:#bd2a54}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:auto}
.tags span{font-size:12px;color:#475467;background:#f1f4f0;border-radius:6px;padding:4px 7px}
.source-link{font-size:13px;color:#1d4ed8;font-weight:850}
.page-hero{
  position:relative;
  overflow:hidden;
  padding:70px 0 42px;
  border-bottom:1px solid var(--line);
  background:#eef2ec;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(17,21,27,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(17,21,27,.035) 1px,transparent 1px);
  background-size:36px 36px;
  opacity:.9;
}
.page-hero .wrap{position:relative;z-index:1}
.page-hero h1{max-width:860px}
.page-hero h1::after{
  content:"";
  display:block;
  width:92px;
  height:8px;
  margin-top:18px;
  background:var(--lime);
  border:1px solid #11151b;
  border-radius:999px;
}
.page-hero p{max-width:820px;color:#465061;font-size:18px;margin:16px 0 0}
.content{padding:54px 0;background:#fff}
.prose{width:min(860px,calc(100% - 40px));margin:0 auto}
.prose h2{font-size:30px;margin:38px 0 12px;line-height:1.2}
.prose h3{font-size:21px;margin:26px 0 8px}
.prose p,.prose li{color:#3f4756}
.prose a{color:#1d4ed8;font-weight:800}
.prose blockquote{margin:24px 0;padding:16px 18px;border-left:4px solid #11151b;background:#f5f7f2;color:#3f4756}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:#fff}
table{border-collapse:collapse;width:100%;min-width:760px}
th,td{padding:13px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:#f4f6f1;color:#11151b}
td{color:#465061}
code,pre{font-family:ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",monospace}
pre{padding:18px;border-radius:8px;background:#10151d;color:#e8eef8;overflow:auto;line-height:1.6}
.notice{
  border:1px solid #f1d7a8;
  background:#fff8ea;
  color:#6f4b12;
  border-radius:8px;
  padding:16px 18px;
}
.quote-panel{
  border:1px solid var(--line);
  border-radius:8px;
  background:#fff;
  padding:28px;
  display:grid;
  grid-template-columns:1fr .55fr;
  gap:24px;
  align-items:center;
}
.quote-panel strong{font-size:28px;line-height:1.25}
.quote-panel p{margin:10px 0 0;color:#596171}
.site-footer{
  padding:46px 0 26px;
  background:#11151b;
  color:#fff;
}
.site-footer .brand{align-items:flex-start;gap:9px}
.site-footer .brand-logo{
  width:30px;
  height:30px;
  border-radius:8px;
  box-shadow:none;
  opacity:.92;
}
.site-footer .brand span:last-child{
  font-size:17px;
  line-height:30px;
}
.footer-grid{display:grid;grid-template-columns:1.35fr repeat(3,1fr);gap:28px}
.site-footer p{color:#b8c0cc;margin:10px 0 0}
.site-footer h4{margin:0 0 10px}
.site-footer a{display:block;color:#d6dce7;margin:7px 0;font-weight:720}
.site-footer a:hover{color:#fff}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  margin-top:28px;
  padding-top:18px;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  color:#b8c0cc;
  font-size:13px;
}
.footer-bottom a{display:inline;color:#d6dce7;margin:0}
.legal-note{font-size:13px;color:#778090}
.article-meta{font-size:13px;color:#667085;margin:0 0 8px}
.article-lanes{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.feature-card{
  grid-column:span 2;
  background:#11151b;
  color:#fff;
  border-color:#11151b;
}
.feature-card p,.feature-card .article-meta{color:#d6dce7}
.feature-card .source-link{color:var(--lime)}
.empty-note{border:1px dashed var(--line);padding:24px;border-radius:8px;background:#fff;color:#596171}
.reveal{animation:rise .42s ease both}
@keyframes rise{from{opacity:.34;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:980px){
  .mobile-toggle{display:inline-flex}
  .nav-links{
    position:absolute;
    left:20px;
    right:20px;
    top:70px;
    display:none;
    flex-direction:column;
    align-items:stretch;
    padding:12px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:8px;
    box-shadow:var(--shadow);
  }
  .nav-links.open{display:flex}
  .hero-grid,.section-head,.principle,.quote-panel{grid-template-columns:1fr}
  h1{font-size:52px}
  .section h2,.page-hero h1{font-size:38px}
  .grid-3,.grid-2,.model-grid,.timeline,.footer-grid{grid-template-columns:1fr}
  .article-lanes{grid-template-columns:1fr}
  .feature-card{grid-column:auto}
  .for-row{grid-template-columns:1fr}
  .hero{min-height:auto}
  .hero::after{background:rgba(247,248,244,.9)}
}
@media(max-width:1100px) and (min-width:981px){
  h1{font-size:60px}
  .hero-grid{grid-template-columns:1.08fr .92fr;gap:34px}
}
@media(max-width:640px){
  .wrap,.nav-shell,.prose{width:min(100% - 28px,1180px)}
  h1{font-size:42px}
  .lead{font-size:17px}
  .section{padding:52px 0}
  .hero-grid{padding:46px 0}
  .actions .btn{width:100%}
  .board-metrics{grid-template-columns:1fr}
  .route-row{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}