/* roulang page: index */
:root{
  --brand-700:#17435C;
  --brand-600:#1E5A78;
  --brand-100:#E6EFF4;
  --accent:#C4713A;
  --accent-soft:#FBEDE4;
  --ok:#2E7D5B;
  --ink-900:#0F2A3A;
  --ink-700:#24455A;
  --ink-500:#5A7285;
  --line:#DCE6ED;
  --bg:#F7F9FB;
  --bg-alt:#EEF3F7;
  --white:#FFFFFF;
  --radius:14px;
  --radius-lg:18px;
  --shadow:0 1px 2px rgba(23,67,92,.06),0 8px 24px rgba(23,67,92,.07);
  --shadow-hover:0 14px 32px rgba(23,67,92,.10);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:15.5px;
  line-height:28px;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-700);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--accent);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:-.2px;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
.container{max-width:1180px;margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--white);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 18px rgba(23,67,92,.08);}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:18px;min-height:72px;
}
.logo{display:flex;flex-direction:column;line-height:1.25;min-width:0;}
.logo-main{
  font-size:19px;font-weight:700;color:var(--ink-900);letter-spacing:-.3px;
  white-space:nowrap;
}
.logo-sub{font-size:12px;color:var(--ink-500);letter-spacing:.5px;white-space:nowrap;}
.top-nav{display:flex;align-items:center;gap:22px;min-width:0;}
.nav-link{
  font-size:14px;color:var(--ink-500);padding:6px 2px;
  border-bottom:2px solid transparent;transition:color .2s ease,border-color .2s ease;
}
.nav-link:hover{color:var(--accent);}
.nav-cat{
  font-size:13.5px;color:var(--brand-700);background:var(--brand-100);
  padding:6px 14px;border-radius:999px;white-space:nowrap;
  transition:background .2s ease,color .2s ease;
}
.nav-cat:hover{background:#dbe9f1;color:var(--brand-600);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:10px;font-size:14.5px;font-weight:600;
  border:1px solid transparent;cursor:pointer;min-height:44px;
  transition:background .22s ease,color .22s ease,border-color .22s ease,box-shadow .22s ease,transform .12s ease;
}
.btn-primary{background:var(--brand-700);color:#fff;box-shadow:0 6px 16px rgba(23,67,92,.16);}
.btn-primary:hover{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-hover);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:var(--white);color:var(--ink-700);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand-700);color:var(--brand-700);}
.btn-white{background:#fff;color:var(--brand-700);}
.btn-white:hover{background:#f3f8fb;color:var(--brand-600);}
.btn-outline-light{background:transparent;color:#eaf3f8;border-color:rgba(255,255,255,.5);}
.btn-outline-light:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff;}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.btn-sm{padding:9px 16px;font-size:13.5px;min-height:40px;}
.nav-cta{white-space:nowrap;}

/* ============ Hero ============ */
.hero{
  padding:64px 0 0;
  background:linear-gradient(180deg,#E9F1F6 0%,var(--bg) 62%);
}
.hero-grid{
  display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:40px;align-items:start;
}
.eyebrow{
  display:inline-block;font-size:12.5px;letter-spacing:.4px;color:var(--brand-700);
  background:var(--white);border:1px solid var(--line);border-radius:999px;
  padding:6px 14px;margin-bottom:18px;
}
.hero h1{
  font-size:34px;line-height:44px;font-weight:700;letter-spacing:-.4px;
  margin-bottom:16px;
}
.hero-sub{font-size:16.5px;line-height:29px;color:var(--ink-700);max-width:600px;margin-bottom:24px;}
.hero-lead{font-size:15px;line-height:29px;color:var(--ink-500);max-width:620px;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.hero-points{display:flex;flex-wrap:wrap;gap:24px;}
.hero-points li{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-700);}
.hero-points svg{width:16px;height:16px;flex:0 0 16px;color:var(--ok);}

.check-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);padding:24px;
}
.check-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;}
.check-head h2{font-size:17px;font-weight:650;}
.check-badge{
  font-size:12px;color:var(--brand-700);background:var(--brand-100);
  border-radius:999px;padding:3px 10px;white-space:nowrap;
}
.check-list{display:flex;flex-direction:column;gap:10px;margin-bottom:16px;}
.check-list li{
  display:flex;align-items:center;gap:10px;
  border:1px solid var(--line);border-radius:999px;
  padding:9px 14px;font-size:13.5px;color:var(--ink-700);
  min-width:0;
}
.check-list li::before{
  content:"✓";flex:0 0 18px;width:18px;height:18px;border-radius:50%;
  background:var(--brand-100);color:var(--brand-700);
  font-size:11px;line-height:18px;text-align:center;
}
.check-warn{
  font-size:13px;line-height:22px;color:var(--accent);
  background:var(--accent-soft);border-left:3px solid var(--accent);
  border-radius:8px;padding:10px 14px;
}
.hero-metrics{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;margin-top:44px;padding-bottom:40px;
}
.metric{padding-top:14px;border-top:2px solid var(--line);min-width:0;}
.metric-num{font-size:22px;font-weight:700;color:var(--brand-700);display:block;line-height:30px;}
.metric-label{font-size:13px;color:var(--ink-500);}

/* ============ Section base ============ */
.section{padding:88px 0;}
.section-alt{background:var(--bg-alt);}
.section-head{max-width:720px;margin-bottom:40px;}
.section-head h2{
  font-size:24px;line-height:34px;font-weight:650;
  padding-left:12px;border-left:4px solid var(--brand-700);
  margin-bottom:14px;
}
.section-head p{color:var(--ink-500);font-size:14.5px;line-height:27px;}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:40px;}

/* ============ Download ============ */
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.dl-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:24px;display:flex;flex-direction:column;gap:14px;
  transition:box-shadow .22s ease,transform .22s ease;
}
.dl-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.dl-icon{
  width:44px;height:44px;border-radius:12px;background:var(--brand-100);
  display:flex;align-items:center;justify-content:center;
}
.dl-icon svg{width:24px;height:24px;stroke:var(--brand-700);fill:none;stroke-width:1.6;}
.dl-card h3{font-size:16.5px;font-weight:650;}
.dl-card p{font-size:13.5px;line-height:23px;color:var(--ink-500);min-height:46px;}
.dl-card .btn{width:100%;}
.dl-note{font-size:12px;color:var(--ink-500);text-align:center;margin-top:18px;}

/* ============ Metrics strip ============ */
.quick-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;}
.quick-item{min-width:0;padding-top:16px;border-top:1px solid var(--line);}
.quick-item strong{display:block;font-size:15.5px;color:var(--ink-900);font-weight:650;margin-bottom:6px;}
.quick-item span{font-size:13px;color:var(--ink-500);line-height:22px;}

/* ============ Group A ============ */
.entry-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.entry-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:12px;
  transition:box-shadow .22s ease,transform .22s ease;
}
.entry-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.entry-no{
  width:44px;height:44px;border-radius:12px;background:var(--brand-100);color:var(--brand-700);
  font-size:18px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.entry-card h3{font-size:17px;font-weight:650;}
.entry-card p{font-size:14px;line-height:25px;color:var(--ink-500);}
.text-link{font-size:13.5px;color:var(--brand-700);font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.text-link:hover{color:var(--accent);}
.text-link .arw{transition:transform .2s ease;}
.text-link:hover .arw{transform:translateX(3px);}

/* ============ Group B ============ */
.dim-layout{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:44px;align-items:start;}
.dim-side{position:sticky;top:96px;}
.dim-side h2{
  font-size:24px;line-height:34px;font-weight:650;
  padding-left:12px;border-left:4px solid var(--brand-700);margin-bottom:14px;
}
.dim-side p{font-size:14.5px;line-height:27px;color:var(--ink-500);margin-bottom:20px;}
.dim-list{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);}
.dim-row{
  display:grid;grid-template-columns:56px minmax(0,1fr) auto;
  gap:16px;align-items:center;padding:20px 24px;
  border-bottom:1px solid var(--line);
  transition:background .2s ease,box-shadow .2s ease;
}
.dim-row:last-child{border-bottom:none;}
.dim-row:hover{background:var(--bg-alt);box-shadow:inset 3px 0 0 var(--brand-700);}
.dim-no{font-size:15px;font-weight:700;color:var(--brand-700);font-variant-numeric:tabular-nums;}
.dim-body{min-width:0;}
.dim-body h3{font-size:15.5px;font-weight:650;margin-bottom:4px;}
.dim-body p{font-size:13.5px;line-height:23px;color:var(--ink-500);}
.tag{
  display:inline-block;font-size:12px;line-height:18px;padding:3px 10px;border-radius:8px;
  background:var(--brand-100);color:var(--brand-700);white-space:nowrap;
}
.tag-risk{background:var(--accent-soft);color:var(--accent);}
.tag-ok{background:#E7F2ED;color:var(--ok);}
.tag-line{background:transparent;border:1px solid var(--line);color:var(--ink-500);}

/* ============ Scenarios ============ */
.scn{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:40px;align-items:center;margin-bottom:56px;}
.scn:last-child{margin-bottom:0;}
.scn.flip .scn-visual{order:2;}
.scn-visual{
  border:1px solid var(--line);border-radius:var(--radius);background:var(--white);
  box-shadow:var(--shadow);padding:26px;min-height:190px;display:flex;flex-direction:column;justify-content:space-between;gap:16px;
}
.scn-visual .vlabel{font-size:12px;color:var(--ink-500);letter-spacing:.5px;}
.scn-bars{display:flex;flex-direction:column;gap:12px;}
.scn-bars i{display:block;height:10px;border-radius:6px;background:var(--brand-100);}
.scn-bars i:nth-child(1){width:88%;}
.scn-bars i:nth-child(2){width:66%;background:#d7e6ee;}
.scn-bars i:nth-child(3){width:44%;background:var(--accent-soft);}
.scn-body h3{font-size:19px;line-height:29px;font-weight:650;margin:12px 0 14px;}
.scn-body ul{display:flex;flex-direction:column;gap:12px;}
.scn-body li{display:flex;gap:10px;font-size:14px;line-height:25px;color:var(--ink-700);}
.scn-body li::before{content:"";flex:0 0 6px;width:6px;height:6px;border-radius:50%;background:var(--brand-700);margin-top:9px;}

/* ============ Demo ============ */
.demo-window{
  background:#0F2A3A;border-radius:16px;padding:14px;box-shadow:0 18px 40px rgba(15,42,58,.22);
}
.demo-bar{display:flex;align-items:center;gap:8px;padding:0 6px 12px;}
.demo-bar span{width:10px;height:10px;border-radius:50%;background:#3C5C70;}
.demo-bar span:nth-child(2){background:#4A6C82;}
.demo-bar span:nth-child(3){background:#5A7E96;}
.demo-inner{
  background:var(--bg);border-radius:12px;padding:20px;
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;
}
.demo-panel{
  background:var(--white);border:1px solid var(--line);border-radius:12px;padding:16px;min-width:0;
}
.demo-panel h4{font-size:14px;font-weight:650;margin-bottom:10px;color:var(--ink-900);}
.demo-line{height:9px;border-radius:5px;background:var(--brand-100);margin-bottom:9px;}
.demo-line.w70{width:70%;}
.demo-line.w50{width:50%;background:#d7e6ee;}
.demo-line.w85{width:85%;}
.demo-chipline{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap;}
.demo-chipline b{font-size:11px;font-weight:600;color:var(--brand-700);background:var(--brand-100);border-radius:999px;padding:3px 9px;}
.demo-cap{font-size:12px;color:var(--ink-500);text-align:center;margin-top:14px;}

/* ============ Risk matrix ============ */
.risk-note{
  background:var(--accent-soft);border-left:3px solid var(--accent);
  border-radius:8px;padding:14px 18px;font-size:13.5px;line-height:24px;color:var(--accent);
  margin-bottom:32px;
}
.risk-layout{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,9fr);gap:36px;align-items:start;}
.risk-scale{display:flex;flex-direction:column;gap:10px;}
.risk-scale div{
  border-radius:10px;padding:14px 16px;font-size:14px;font-weight:600;color:var(--ink-900);
  border:1px solid var(--line);
}
.risk-scale div:nth-child(1){background:#EDF4F8;}
.risk-scale div:nth-child(2){background:#DFEBF2;}
.risk-scale div:nth-child(3){background:#F3E5DA;color:#8A4A1F;}
.risk-scale div:nth-child(4){background:var(--accent-soft);color:var(--accent);border-color:#EFD6C4;}
.risk-scale small{display:block;font-weight:400;font-size:12px;color:inherit;opacity:.85;margin-top:4px;}
.risk-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.risk-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);min-width:0;
}
.risk-card h3{font-size:15.5px;font-weight:650;margin-bottom:12px;}
.risk-card dl{margin:0;display:flex;flex-direction:column;gap:8px;}
.risk-card dt{font-size:12px;color:var(--ink-500);}
.risk-card dd{margin:0 0 6px;font-size:13.5px;line-height:23px;color:var(--ink-700);}

/* ============ Samples ============ */
.sample-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.sample-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:14px;min-width:0;
  transition:box-shadow .22s ease,transform .22s ease;
}
.sample-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.sample-card h3{font-size:16px;font-weight:650;}
.sample-block{border-top:1px solid var(--line);padding-top:12px;}
.sample-block strong{display:block;font-size:12px;color:var(--ink-500);font-weight:600;margin-bottom:4px;}
.sample-block span{font-size:13.5px;line-height:23px;color:var(--ink-700);}

/* ============ Cost ============ */
.cost-table{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);
}
.cost-row{
  display:grid;grid-template-columns:minmax(0,3fr) minmax(0,5fr) minmax(0,4fr);
  gap:20px;padding:20px 24px;border-bottom:1px solid var(--line);align-items:center;
}
.cost-row:last-child{border-bottom:none;}
.cost-row.head{background:var(--bg-alt);font-size:12.5px;color:var(--ink-500);font-weight:600;letter-spacing:.4px;}
.cost-row strong{font-size:14.5px;color:var(--ink-900);font-weight:650;}
.cost-row p{font-size:13.5px;line-height:23px;color:var(--ink-500);}
.price-slot{
  border:1px dashed #C7D6E0;border-radius:10px;padding:10px 12px;background:var(--bg);
  font-size:12.5px;line-height:20px;color:var(--ink-500);text-align:center;
}

/* ============ Views wall ============ */
.view-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.view-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden;min-width:0;
}
.view-card header{
  background:var(--bg-alt);padding:14px 20px;font-size:12.5px;color:var(--ink-500);
  border-bottom:1px solid var(--line);
}
.view-half{padding:18px 20px;}
.view-half + .view-half{border-top:1px dashed var(--line);}
.view-half strong{display:block;font-size:12px;color:var(--ink-500);margin-bottom:6px;font-weight:600;}
.view-half p{font-size:13.5px;line-height:24px;color:var(--ink-700);}
.view-half.result p{color:var(--brand-700);}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px;}
.faq-item{
  background:var(--white);border:1px solid var(--line);border-left:3px solid var(--brand-100);
  border-radius:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item.open{border-left-color:var(--brand-700);box-shadow:var(--shadow);}
.faq-q{
  width:100%;background:none;border:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:15px;font-weight:600;color:var(--ink-900);text-align:left;
  transition:color .2s ease;
}
.faq-q:hover{color:var(--brand-700);}
.faq-icon{
  flex:0 0 22px;width:22px;height:22px;border-radius:50%;
  background:var(--brand-100);color:var(--brand-700);
  display:flex;align-items:center;justify-content:center;font-size:15px;line-height:1;
  transition:transform .2s ease;
}
.faq-item.open .faq-icon{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease;}
.faq-item.open .faq-a{max-height:420px;}
.faq-a p{padding:0 22px 18px;font-size:14px;line-height:26px;color:var(--ink-500);}

/* ============ Topics ============ */
.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.topic-card{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  background:var(--white);border:1px solid var(--line);border-radius:12px;
  padding:20px;box-shadow:var(--shadow);min-width:0;
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.topic-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);border-color:#c9d9e3;color:var(--brand-700);}
.topic-card h3{font-size:14.5px;font-weight:650;margin-bottom:4px;color:inherit;}
.topic-card span{font-size:12.5px;color:var(--ink-500);}
.topic-card .arw{color:var(--brand-700);flex:0 0 auto;}

/* ============ News / CMS ============ */
.news-layout{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:32px;align-items:start;}
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.news-card{
  display:flex;flex-direction:column;gap:10px;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);min-width:0;color:inherit;
  transition:box-shadow .22s ease,transform .22s ease;
}
.news-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);color:inherit;}
.news-cat{
  align-self:flex-start;font-size:12px;color:var(--brand-700);background:var(--brand-100);
  border-radius:8px;padding:3px 10px;
}
.news-card h3{
  font-size:15px;line-height:25px;font-weight:650;color:var(--ink-900);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card p{
  font-size:13.5px;line-height:23px;color:var(--ink-500);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--ink-500);
}
.news-side{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);
}
.news-side h3{font-size:15.5px;font-weight:650;margin-bottom:14px;}
.side-list{display:flex;flex-direction:column;gap:12px;}
.side-list a{
  display:flex;align-items:flex-start;gap:10px;font-size:13.5px;line-height:23px;color:var(--ink-700);
  padding-bottom:12px;border-bottom:1px dashed var(--line);
}
.side-list a:last-child{border-bottom:none;padding-bottom:0;}
.side-list a:hover{color:var(--accent);}
.side-list a::before{content:"·";color:var(--brand-700);font-weight:700;}
.empty-state{
  border:1px dashed #C7D6E0;background:var(--bg);border-radius:12px;
  padding:36px 24px;text-align:center;
}
.empty-state p{font-size:14px;color:var(--ink-500);margin-bottom:12px;}

/* ============ CTA band ============ */
.cta-band{
  background:var(--brand-700);border-radius:var(--radius-lg);
  padding:44px;display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;box-shadow:0 18px 40px rgba(23,67,92,.18);
}
.cta-band h2{color:#fff;font-size:23px;line-height:33px;font-weight:650;margin-bottom:10px;}
.cta-band p{color:#C9DDE8;font-size:14.5px;line-height:26px;max-width:560px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ============ Notice ============ */
.notice{
  background:var(--accent-soft);border-left:3px solid var(--accent);
  border-radius:10px;padding:22px 24px;
}
.notice p{font-size:13.5px;line-height:25px;color:#8A4A1F;}
.notice p + p{margin-top:6px;}

/* ============ Footer ============ */
.site-footer{
  background:var(--white);border-top:1px solid var(--line);
  padding:56px 0 0;margin-top:8px;
}
.footer-grid{
  display:grid;grid-template-columns:minmax(0,5fr) minmax(0,3fr) minmax(0,4fr);
  gap:40px;padding-bottom:40px;
}
.footer-brand .logo-main{font-size:18px;}
.footer-brand p{margin-top:12px;font-size:13.5px;line-height:24px;color:var(--ink-500);max-width:340px;}
.footer-col h4{font-size:14px;font-weight:650;margin-bottom:14px;color:var(--ink-900);}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:13.5px;color:var(--ink-500);}
.footer-col a:hover{color:var(--brand-700);}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:12.5px;color:var(--ink-500);line-height:22px;}

/* ============ Responsive ============ */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:32px;}
  .hero h1{font-size:30px;line-height:40px;}
  .hero-metrics{grid-template-columns:repeat(2,minmax(0,1fr));}
  .dim-layout{grid-template-columns:minmax(0,1fr);gap:28px;}
  .dim-side{position:static;}
  .risk-layout{grid-template-columns:minmax(0,1fr);gap:24px;}
  .news-layout{grid-template-columns:minmax(0,1fr);}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .scn{grid-template-columns:minmax(0,1fr);gap:24px;}
  .scn.flip .scn-visual{order:0;}
  .cost-row{grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);}
  .cost-row .price-slot{grid-column:1 / -1;}
  .cost-row.head{display:none;}
}
@media (max-width:768px){
  .section{padding:64px 0;}
  .hero{padding-top:44px;}
  .dl-grid{grid-template-columns:minmax(0,1fr);}
  .quick-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .entry-grid{grid-template-columns:minmax(0,1fr);}
  .risk-cards{grid-template-columns:minmax(0,1fr);}
  .sample-grid{grid-template-columns:minmax(0,1fr);}
  .view-grid{grid-template-columns:minmax(0,1fr);}
  .topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .demo-inner{grid-template-columns:minmax(0,1fr);}
  .nav-cat{display:none;}
  .header-inner{min-height:64px;}
  .top-nav{gap:14px;}
  .nav-link{font-size:13px;}
  .btn.nav-cta{padding:10px 16px;font-size:13.5px;min-height:40px;}
}
@media (max-width:520px){
  .container{padding:0 18px;}
  .hero h1{font-size:26px;line-height:34px;}
  .hero-sub{font-size:15px;line-height:26px;}
  .hero-metrics{grid-template-columns:minmax(0,1fr);gap:16px;margin-top:32px;}
  .quick-grid{grid-template-columns:minmax(0,1fr);}
  .news-grid{grid-template-columns:minmax(0,1fr);}
  .topic-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .cta-band{padding:26px;}
  .cta-band h2{font-size:20px;line-height:30px;}
  .cost-row{grid-template-columns:minmax(0,1fr);gap:10px;padding:18px;}
  .dim-row{grid-template-columns:40px minmax(0,1fr);padding:16px 18px;}
  .dim-row .tag{grid-column:2;}
  .logo-main{font-size:17px;}
  .logo-sub{font-size:11px;}
  .top-nav .nav-link{display:none;}
  .hero-actions .btn{width:100%;}
}

/* roulang page: category1 */
:root{
  --brand-700:#17435C;
  --brand-600:#1E5A78;
  --brand-100:#E6EFF4;
  --accent:#C4713A;
  --accent-soft:#FBEDE4;
  --ok:#2E7D5B;
  --ink-900:#0F2A3A;
  --ink-700:#24455A;
  --ink-500:#5A7285;
  --line:#DCE6ED;
  --bg:#F7F9FB;
  --bg-alt:#EEF3F7;
  --white:#FFFFFF;
  --radius:14px;
  --radius-lg:18px;
  --shadow:0 1px 2px rgba(23,67,92,.06),0 8px 24px rgba(23,67,92,.07);
  --shadow-hover:0 14px 32px rgba(23,67,92,.10);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:15.5px;
  line-height:28px;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-700);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--accent);}
button{font-family:inherit;}
.container{max-width:1180px;margin:0 auto;padding:0 24px;}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--white);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 18px rgba(23,67,92,.08);}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:18px;min-height:72px;
}
.logo{display:flex;flex-direction:column;line-height:1.25;min-width:0;}
.logo-main{
  font-size:19px;font-weight:700;color:var(--ink-900);letter-spacing:-.3px;
  white-space:nowrap;
}
.logo-sub{font-size:12px;color:var(--ink-500);letter-spacing:.5px;white-space:nowrap;}
.top-nav{display:flex;align-items:center;gap:22px;min-width:0;}
.nav-link{
  font-size:14px;color:var(--ink-500);padding:6px 2px;
  border-bottom:2px solid transparent;transition:color .2s ease,border-color .2s ease;
}
.nav-link:hover{color:var(--accent);}
.nav-cat{
  font-size:13.5px;color:var(--brand-700);background:var(--brand-100);
  padding:6px 14px;border-radius:999px;white-space:nowrap;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease;
}
.nav-cat:hover{background:#dbe9f1;color:var(--brand-600);}
.nav-cat.is-active{background:var(--brand-700);color:#fff;box-shadow:0 4px 12px rgba(23,67,92,.18);}
.nav-cat.is-active:hover{background:var(--brand-600);color:#fff;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:10px;font-size:14.5px;font-weight:600;
  border:1px solid transparent;cursor:pointer;min-height:44px;
  transition:background .22s ease,color .22s ease,border-color .22s ease,box-shadow .22s ease,transform .12s ease;
}
.btn-primary{background:var(--brand-700);color:#fff;box-shadow:0 6px 16px rgba(23,67,92,.16);}
.btn-primary:hover{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-hover);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:var(--white);color:var(--ink-700);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand-700);color:var(--brand-700);}
.btn-sm{padding:9px 16px;font-size:13.5px;min-height:40px;}
.nav-cta{white-space:nowrap;}

/* ============ Section base ============ */
.section{padding:72px 0;}
.section-alt{background:var(--bg-alt);}
.section-head{max-width:760px;margin-bottom:34px;}
.section-head h2{
  font-size:24px;line-height:34px;font-weight:650;color:var(--ink-900);
  padding-left:12px;border-left:4px solid var(--brand-700);
  margin-bottom:12px;
}
.section-head p{color:var(--ink-500);font-size:14.5px;line-height:27px;}

/* ============ 1. 分类头部 ============ */
.cat-head{
  padding:34px 0 56px;
  background:linear-gradient(180deg,#E9F1F6 0%,var(--bg) 72%);
  border-bottom:1px solid var(--line);
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);margin-bottom:24px;}
.breadcrumb a{color:var(--ink-500);}
.breadcrumb a:hover{color:var(--brand-700);}
.breadcrumb .sep{color:#B9CBD6;}
.breadcrumb .crumb-current{color:var(--brand-700);font-weight:600;}
.cat-head-grid{
  display:grid;grid-template-columns:minmax(0,1fr) 292px;
  gap:36px;align-items:start;
}
.cat-head h1{
  font-size:30px;line-height:43px;font-weight:700;color:var(--ink-900);
  letter-spacing:-.3px;padding-left:16px;border-left:4px solid var(--brand-700);
  margin-bottom:16px;
}
.cat-head .cat-lead{
  font-size:15.5px;line-height:29px;color:var(--ink-700);
  max-width:640px;
}
.cat-meta-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);padding:22px;
}
.cat-meta-card .meta-title{
  font-size:13px;font-weight:650;color:var(--brand-700);
  background:var(--brand-100);border-radius:999px;padding:4px 12px;
  display:inline-block;margin-bottom:16px;
}
.cat-meta-card dl{margin:0;display:flex;flex-direction:column;gap:12px;}
.cat-meta-card dt{font-size:12.5px;color:var(--ink-500);line-height:20px;}
.cat-meta-card dd{margin:2px 0 0;font-size:14px;color:var(--ink-900);font-weight:600;line-height:22px;}

/* ============ 2. 分类速览卡 ============ */
.overview-grid{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);overflow:hidden;
}
.overview-item{
  padding:22px 20px;border-left:1px solid var(--line);min-width:0;
}
.overview-item:first-child{border-left:none;}
.overview-item .idx{
  font-size:12px;color:var(--brand-700);letter-spacing:1px;
  font-variant-numeric:tabular-nums;display:block;margin-bottom:6px;
}
.overview-item strong{display:block;font-size:15px;color:var(--ink-900);margin-bottom:4px;}
.overview-item span.desc{font-size:13px;color:var(--ink-500);line-height:22px;display:block;}

/* ============ 3. 列表主体 ============ */
.cat-list{display:flex;flex-direction:column;gap:14px;}
.cat-row{
  position:relative;display:grid;
  grid-template-columns:60px minmax(0,1fr) 132px;
  gap:22px;align-items:center;
  padding:22px 22px 22px 20px;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:0 1px 2px rgba(23,67,92,.04);
  transition:background .2s ease,box-shadow .2s ease,transform .2s ease;
}
.cat-row::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;
  border-radius:3px;background:transparent;transition:background .2s ease;
}
.cat-row:hover{background:var(--bg-alt);box-shadow:var(--shadow);transform:translateY(-1px);}
.cat-row:hover::before{background:var(--brand-700);}
.cat-row .row-idx{
  font-size:20px;font-weight:700;color:var(--brand-700);
  background:var(--brand-100);border-radius:10px;
  width:52px;height:52px;display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;letter-spacing:-.5px;
}
.cat-row h3{
  font-size:16.5px;line-height:26px;font-weight:650;color:var(--ink-900);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.cat-row:hover h3{color:var(--brand-600);}
.cat-row p{
  font-size:13.5px;line-height:23px;color:var(--ink-500);margin-top:6px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.cat-row .row-side{
  display:flex;flex-direction:column;align-items:flex-end;gap:8px;min-width:0;
}
.tag{
  display:inline-block;font-size:12px;line-height:18px;padding:3px 10px;
  border-radius:8px;white-space:nowrap;
}
.tag-cat{background:var(--brand-100);color:var(--brand-700);}
.tag-risk{background:var(--accent-soft);color:var(--accent);}
.tag-outline{background:transparent;border:1px solid var(--line);color:var(--ink-500);}
.row-time{font-size:12.5px;color:var(--ink-500);font-variant-numeric:tabular-nums;white-space:nowrap;}
.empty-box{
  border:1px dashed var(--line);background:var(--bg-alt);border-radius:var(--radius);
  padding:38px 24px;text-align:center;color:var(--ink-500);font-size:14px;
}

/* ============ 4. 维度对照 ============ */
.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.compare-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:22px;min-width:0;
}
.compare-card h3{font-size:16px;font-weight:650;color:var(--ink-900);margin-bottom:6px;}
.compare-card .compare-note{font-size:13px;color:var(--ink-500);line-height:22px;margin-bottom:10px;}
.compare-row{
  display:grid;grid-template-columns:104px minmax(0,1fr);gap:14px;
  padding:13px 0;border-top:1px solid var(--line);
}
.compare-row dt{font-size:13px;color:var(--brand-700);font-weight:600;line-height:22px;}
.compare-row dd{margin:0;font-size:13.5px;color:var(--ink-700);line-height:23px;}

/* ============ 5. FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:0 1px 2px rgba(23,67,92,.04);overflow:hidden;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.faq-item:hover{box-shadow:var(--shadow);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:18px 22px 18px 20px;background:none;border:0;
  font-size:15.5px;font-weight:600;color:var(--ink-900);text-align:left;
  cursor:pointer;min-height:44px;line-height:26px;
  border-left:3px solid var(--brand-100);
  transition:border-color .2s ease,color .2s ease;
}
.faq-item.open .faq-q{border-left-color:var(--brand-700);color:var(--brand-700);}
.faq-icon{
  flex:0 0 22px;width:22px;height:22px;border-radius:50%;
  background:var(--brand-100);color:var(--brand-700);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;line-height:1;font-weight:600;
  transition:transform .22s ease,background .22s ease,color .22s ease;
}
.faq-item.open .faq-icon{transform:rotate(180deg);background:var(--brand-700);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;}
.faq-item.open .faq-a{max-height:420px;}
.faq-a-inner{padding:0 22px 20px 23px;font-size:14px;line-height:26px;color:var(--ink-700);}

/* ============ 6. 延伸阅读 ============ */
.read-list{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;
}
.read-item{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;background:var(--white);border:1px solid var(--line);
  border-radius:var(--radius);min-width:0;
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.read-item:hover{border-color:var(--brand-700);box-shadow:var(--shadow);transform:translateY(-1px);}
.read-item .read-title{
  font-size:14.5px;font-weight:600;color:var(--ink-900);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0;
}
.read-item:hover .read-title{color:var(--brand-700);}
.read-item .read-time{font-size:12.5px;color:var(--ink-500);white-space:nowrap;font-variant-numeric:tabular-nums;}
.read-empty{font-size:13.5px;color:var(--ink-500);}

/* ============ 7. 下载提示条 ============ */
.dl-strip{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);padding:22px 26px;
}
.dl-strip .dl-text{min-width:0;}
.dl-strip h2{font-size:17px;font-weight:650;color:var(--ink-900);margin-bottom:4px;}
.dl-strip p{font-size:13px;color:var(--ink-500);line-height:22px;}
.dl-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ 8. 返回与 CTA ============ */
.cat-cta{
  background:var(--brand-700);border-radius:var(--radius-lg);
  padding:38px 40px;display:flex;align-items:center;justify-content:space-between;
  gap:28px;flex-wrap:wrap;box-shadow:0 16px 36px rgba(23,67,92,.18);
}
.cat-cta h2{font-size:22px;line-height:32px;font-weight:650;color:#fff;margin-bottom:8px;}
.cat-cta p{font-size:14px;line-height:25px;color:#CFE0EA;max-width:520px;}
.cat-cta .cta-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center;}
.btn-white{background:#fff;color:var(--brand-700);}
.btn-white:hover{background:#f0f6fa;color:var(--brand-600);}
.btn-outline-light{background:transparent;color:#EAF3F8;border-color:rgba(255,255,255,.55);}
.btn-outline-light:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff;}
.back-line{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:28px;padding-top:22px;border-top:1px solid var(--line);
}
.back-link{font-size:14px;color:var(--brand-700);display:inline-flex;align-items:center;gap:8px;}
.back-link:hover{color:var(--accent);}
.disclaimer{font-size:12.5px;color:var(--ink-500);line-height:22px;}

/* ============ Footer ============ */
.site-footer{background:var(--brand-700);color:#CFE0EA;padding:64px 0 26px;margin-top:0;}
.footer-grid{
  display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) minmax(0,1fr);
  gap:40px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.16);
}
.footer-brand .logo-main{display:block;color:#fff;font-size:19px;font-weight:700;letter-spacing:-.2px;}
.footer-brand .logo-sub{display:block;color:#9FBECE;font-size:12px;margin-top:6px;}
.footer-brand p{margin-top:14px;font-size:13px;line-height:24px;color:#B7CDD9;max-width:340px;}
.footer-col h4{font-size:14px;color:#fff;font-weight:650;margin-bottom:14px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:13.5px;color:#B7CDD9;}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:22px;font-size:12.5px;color:#9FBECE;
}
.footer-bottom p{margin:0;line-height:22px;}

/* ============ Responsive ============ */
@media (max-width:1024px){
  .cat-head-grid{grid-template-columns:minmax(0,1fr);}
  .cat-meta-card{max-width:none;}
  .overview-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .overview-item:nth-child(3){border-left:none;}
  .overview-item:nth-child(n+3){border-top:1px solid var(--line);}
  .cat-row{grid-template-columns:52px minmax(0,1fr);}
  .cat-row .row-side{flex-direction:row;align-items:center;gap:10px;grid-column:2;justify-content:flex-start;}
  .compare-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  .header-inner{flex-wrap:wrap;gap:12px;padding:10px 0;min-height:auto;}
  .top-nav{gap:14px;flex-wrap:wrap;}
  .nav-cat{font-size:12.5px;padding:5px 11px;}
  .nav-cta{padding:9px 16px;font-size:13.5px;min-height:40px;}
  .section{padding:48px 0;}
  .cat-head{padding:24px 0 40px;}
  .cat-head h1{font-size:25px;line-height:36px;}
  .section-head h2{font-size:21px;line-height:31px;}
  .read-list{grid-template-columns:minmax(0,1fr);}
  .dl-strip{padding:20px;}
  .dl-actions{width:100%;}
  .dl-actions .btn{flex:1 1 150px;}
  .cat-cta{padding:28px 22px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px;}
}
@media (max-width:520px){
  .overview-grid{grid-template-columns:minmax(0,1fr);}
  .overview-item{border-left:none;border-top:1px solid var(--line);}
  .overview-item:first-child{border-top:none;}
  .cat-row{grid-template-columns:minmax(0,1fr);gap:12px;padding:18px;}
  .cat-row .row-idx{width:44px;height:44px;font-size:17px;}
  .cat-row .row-side{grid-column:1;}
  .cat-row h3{white-space:normal;}
  .compare-row{grid-template-columns:minmax(0,1fr);gap:4px;}
  .logo-main{font-size:17px;}
  .logo-sub{font-size:11px;}
  .cat-cta .cta-actions{width:100%;}
  .cat-cta .cta-actions .btn{flex:1 1 140px;}
}

/* roulang page: article */
:root{
  --brand-700:#17435C;
  --brand-600:#1E5A78;
  --brand-100:#E6EFF4;
  --accent:#C4713A;
  --accent-soft:#FBEDE4;
  --ok:#2E7D5B;
  --ink-900:#0F2A3A;
  --ink-700:#24455A;
  --ink-500:#5A7285;
  --line:#DCE6ED;
  --bg:#F7F9FB;
  --bg-alt:#EEF3F7;
  --white:#FFFFFF;
  --radius:14px;
  --radius-lg:18px;
  --shadow:0 1px 2px rgba(23,67,92,.06),0 8px 24px rgba(23,67,92,.07);
  --shadow-hover:0 14px 32px rgba(23,67,92,.10);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:15.5px;
  line-height:28px;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:-.2px;}
p{margin:0 0 14px;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-700);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--accent);}
button{font-family:inherit;}
.container{max-width:1180px;margin:0 auto;padding:0 24px;}
section[id],[id="entry-check"]{scroll-margin-top:92px;}
/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--white);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 18px rgba(23,67,92,.08);}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:18px;min-height:72px;
}
.logo{display:flex;flex-direction:column;line-height:1.25;min-width:0;}
.logo-main{
  font-size:19px;font-weight:700;color:var(--ink-900);letter-spacing:-.3px;
  white-space:nowrap;
}
.logo-sub{font-size:12px;color:var(--ink-500);letter-spacing:.5px;white-space:nowrap;}
.top-nav{display:flex;align-items:center;gap:22px;min-width:0;}
.nav-link{
  font-size:14px;color:var(--ink-500);padding:6px 2px;
  border-bottom:2px solid transparent;transition:color .2s ease,border-color .2s ease;
}
.nav-link:hover{color:var(--accent);}
.nav-cat{
  font-size:13.5px;color:var(--brand-700);background:var(--brand-100);
  padding:6px 14px;border-radius:999px;white-space:nowrap;
  transition:background .2s ease,color .2s ease;
}
.nav-cat:hover{background:#dbe9f1;color:var(--brand-600);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:10px;font-size:14.5px;font-weight:600;
  border:1px solid transparent;cursor:pointer;min-height:44px;
  transition:background .22s ease,color .22s ease,border-color .22s ease,box-shadow .22s ease,transform .12s ease;
}
.btn-primary{background:var(--brand-700);color:#fff;box-shadow:0 6px 16px rgba(23,67,92,.16);}
.btn-primary:hover{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-hover);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:var(--white);color:var(--ink-700);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand-700);color:var(--brand-700);}
.btn-sm{padding:9px 16px;font-size:13.5px;min-height:40px;}
.nav-cta{white-space:nowrap;}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
/* ============ Article layout ============ */
.art-shell{padding:32px 0 0;}
.crumb-row{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  font-size:13px;color:var(--ink-500);
}
.crumb-row a{color:var(--ink-500);}
.crumb-row a:hover{color:var(--accent);}
.crumb-sep{color:#b7c9d4;}
.crumb-current{color:var(--ink-700);}
.tag-row{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-top:14px;}
.tag-pill{
  display:inline-flex;align-items:center;
  font-size:12.5px;line-height:18px;color:var(--brand-700);
  background:var(--brand-100);border-radius:999px;padding:4px 12px;
}
.tag-pill-outline{
  background:transparent;border:1px solid var(--line);color:var(--ink-700);
}
/* Article head */
.art-head{padding:26px 0 30px;border-bottom:1px solid var(--line);}
.art-head h1{
  font-size:32px;line-height:44px;font-weight:700;letter-spacing:-.4px;
  max-width:900px;margin-bottom:18px;
}
.art-meta{
  display:flex;align-items:center;flex-wrap:wrap;gap:18px;
  font-size:13px;color:var(--ink-500);
}
.art-meta span{display:inline-flex;align-items:center;gap:6px;}
.art-meta svg{width:15px;height:15px;color:var(--ink-500);flex:0 0 15px;}
/* Key points */
.art-key-wrap{padding:40px 0 0;}
.key-card{
  max-width:820px;margin:0 auto;
  background:var(--brand-100);border:1px solid #d3e2ec;border-radius:var(--radius-lg);
  padding:26px 28px 22px;
}
.key-card h2{
  font-size:16px;line-height:26px;font-weight:650;color:var(--brand-700);
  padding-left:12px;border-left:4px solid var(--brand-700);margin-bottom:16px;
}
.key-list li{
  position:relative;padding-left:20px;margin-bottom:12px;
  font-size:14.5px;line-height:26px;color:var(--ink-700);
}
.key-list li:last-child{margin-bottom:0;}
.key-list li::before{
  content:"";position:absolute;left:0;top:11px;
  width:7px;height:7px;border-radius:50%;background:var(--brand-700);
}
/* Prose */
.art-body{padding:44px 0 8px;}
.article-prose{
  max-width:760px;margin:0 auto;min-width:0;
  font-size:15.5px;line-height:28px;color:var(--ink-700);
  overflow-wrap:break-word;word-break:normal;
}
.article-prose > p{margin:0 0 18px;}
.article-prose h2{
  font-size:22px;line-height:32px;font-weight:650;color:var(--ink-900);
  padding-left:12px;border-left:4px solid var(--brand-700);
  margin:32px 0 16px;
}
.article-prose h3{font-size:20px;line-height:30px;font-weight:600;color:var(--ink-900);margin:26px 0 12px;}
.article-prose h4{font-size:17px;line-height:27px;font-weight:600;color:var(--ink-900);margin:22px 0 10px;}
.article-prose ul,.article-prose ol{padding-left:22px;margin:0 0 18px;}
.article-prose ul{list-style:disc;}
.article-prose ol{list-style:decimal;}
.article-prose li{margin-bottom:12px;line-height:27px;}
.article-prose li:last-child{margin-bottom:0;}
.article-prose blockquote{
  margin:20px 0;padding:14px 18px;background:var(--bg-alt);
  border-left:3px solid var(--accent);border-radius:0 10px 10px 0;color:var(--ink-700);
}
.article-prose blockquote p{margin-bottom:10px;}
.article-prose blockquote p:last-child{margin-bottom:0;}
.article-prose img{border-radius:12px;border:1px solid var(--line);margin:18px 0;}
.article-prose figure{margin:20px 0;}
.article-prose figcaption{font-size:12px;line-height:20px;color:var(--ink-500);text-align:center;margin-top:8px;}
.article-prose a{color:var(--brand-700);text-decoration:underline;text-underline-offset:3px;}
.article-prose a:hover{color:var(--accent);}
.article-prose strong{color:var(--ink-900);font-weight:650;}
.article-prose table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px;line-height:24px;table-layout:fixed;}
.article-prose th,.article-prose td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top;overflow-wrap:break-word;}
.article-prose th{background:var(--bg-alt);color:var(--ink-900);font-weight:600;}
.article-prose code{
  background:var(--bg-alt);border-radius:6px;padding:2px 6px;
  font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13.5px;color:var(--brand-700);
}
.article-empty{
  max-width:760px;margin:0 auto;text-align:center;
  border:1px dashed var(--line);background:var(--bg-alt);
  border-radius:var(--radius);padding:44px 24px;
}
.article-empty p{font-size:15px;color:var(--ink-500);margin-bottom:18px;}
/* Risk box */
.art-risk{padding:36px 0 0;}
.risk-box{
  max-width:820px;margin:0 auto;
  background:var(--accent-soft);border-radius:var(--radius);
  border-left:4px solid var(--accent);
  padding:22px 24px;
}
.risk-box h2{
  font-size:16px;line-height:26px;font-weight:650;color:#8f4f24;margin-bottom:12px;
}
.risk-box p{font-size:14px;line-height:25px;color:#7c4a27;margin-bottom:10px;}
.risk-box p:last-child{margin-bottom:0;}
/* Related */
.art-related{padding:48px 0 0;}
.art-related h2{
  font-size:22px;line-height:32px;font-weight:650;
  padding-left:12px;border-left:4px solid var(--brand-700);margin-bottom:22px;
}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.rel-card{
  display:flex;flex-direction:column;gap:12px;min-width:0;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:22px;
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.rel-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);border-color:#c8dae6;}
.rel-card h3{
  font-size:15.5px;line-height:26px;font-weight:600;color:var(--ink-900);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rel-card .rel-foot{
  display:flex;align-items:center;justify-content:space-between;
  font-size:12.5px;color:var(--ink-500);margin-top:auto;
}
.rel-card .rel-foot svg{width:16px;height:16px;transition:transform .22s ease;}
.rel-card:hover .rel-foot svg{transform:translateX(2px);color:var(--brand-700);}
.empty-line{
  font-size:13.5px;color:var(--ink-500);
  border:1px dashed var(--line);background:var(--bg-alt);
  border-radius:var(--radius);padding:22px;text-align:center;
}
/* Pager */
.art-pager{padding:44px 0 0;}
.pager-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.pager-item{
  display:flex;flex-direction:column;gap:6px;min-width:0;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;transition:border-color .22s ease,box-shadow .22s ease,transform .22s ease;
}
.pager-item:hover{border-color:var(--brand-700);box-shadow:var(--shadow);transform:translateY(-2px);}
.pager-label{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;color:var(--ink-500);
}
.pager-label svg{width:14px;height:14px;}
.pager-title{
  font-size:15px;line-height:25px;font-weight:600;color:var(--ink-900);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.pager-item.is-disabled{background:var(--bg-alt);border-style:dashed;}
.pager-item.is-disabled .pager-title{color:var(--ink-500);font-weight:400;}
.pager-item.is-next .pager-label{justify-content:flex-end;}
.pager-item.is-next .pager-title{text-align:right;}
/* Download strip */
.art-dl{padding:48px 0 0;}
.dl-strip{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);padding:24px 28px;
}
.dl-strip-text{min-width:0;flex:1 1 320px;}
.dl-strip-text h2{font-size:17px;line-height:27px;font-weight:650;margin-bottom:6px;}
.dl-strip-text p{font-size:13.5px;line-height:24px;color:var(--ink-500);margin:0;}
.dl-strip-actions{display:flex;flex-wrap:wrap;gap:12px;}
/* Article footer */
.art-foot{padding:44px 0 72px;}
.art-foot-inner{
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding-top:22px;
}
.back-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--brand-700);}
.back-link svg{width:15px;height:15px;transition:transform .22s ease;}
.back-link:hover svg{transform:translateX(-3px);}
.foot-note{font-size:12.5px;line-height:22px;color:var(--ink-500);max-width:620px;margin:0;}
/* ============ Footer ============ */
.site-footer{background:var(--brand-700);color:#dbe7ee;padding:56px 0 26px;}
.footer-grid{
  display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) minmax(0,1fr);
  gap:32px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.16);
}
.footer-brand .logo-main{display:block;font-size:18px;font-weight:700;color:#fff;letter-spacing:-.2px;}
.footer-brand .logo-sub{display:block;font-size:12px;color:#a8c3d3;letter-spacing:.5px;margin-top:3px;}
.footer-brand p{color:#c3d7e2;font-size:13.5px;line-height:24px;margin-top:14px;max-width:360px;}
.footer-col h4{color:#fff;font-size:14px;font-weight:650;margin-bottom:14px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{color:#c3d7e2;font-size:13.5px;}
.footer-col a:hover{color:#fff;}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:20px;}
.footer-bottom p{font-size:12.5px;line-height:22px;color:#9fbccd;margin:0;}
/* ============ Responsive ============ */
@media (max-width:1024px){
  .header-inner{min-height:68px;}
  .top-nav{gap:16px;}
  .art-head h1{font-size:28px;line-height:40px;}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  .header-inner{flex-wrap:wrap;gap:12px;padding:12px 0;}
  .logo-main{font-size:17px;}
  .logo-sub{font-size:11px;}
  .top-nav{width:100%;justify-content:space-between;gap:10px;}
  .nav-cat{font-size:12.5px;padding:5px 11px;}
  .nav-cta{padding:9px 14px;font-size:13px;min-height:40px;}
  .art-head h1{font-size:24px;line-height:35px;}
  .art-meta{gap:12px;font-size:12.5px;}
  .key-card{padding:22px 20px;}
  .art-related h2,.article-prose h2{font-size:20px;line-height:30px;}
  .rel-grid{grid-template-columns:minmax(0,1fr);}
  .pager-grid{grid-template-columns:minmax(0,1fr);}
  .pager-item.is-next .pager-label{justify-content:flex-start;}
  .pager-item.is-next .pager-title{text-align:left;}
  .dl-strip{padding:22px 20px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .article-prose table{font-size:13px;}
}
@media (max-width:520px){
  .art-head h1{font-size:22px;line-height:33px;}
  .art-shell{padding-top:22px;}
  .art-body{padding-top:34px;}
  .dl-strip-actions{width:100%;}
  .dl-strip-actions .btn{width:100%;}
  .btn{width:auto;}
  .art-meta span{font-size:12px;}
}