/* roulang page: index */
:root{
  --brand:#1656d6;
  --brand-strong:#0d3a9e;
  --brand-light:#2f74e8;
  --brand-soft:#eef4ff;
  --brand-deep:#08192f;
  --gold:#c9922f;
  --ink:#132338;
  --ink-2:#39506e;
  --muted:#63798f;
  --line:#e2e9f4;
  --bg:#f5f8fd;
  --white:#ffffff;
  --radius-s:10px;
  --radius:16px;
  --radius-l:22px;
  --shadow-s:0 4px 14px rgba(15,42,84,.06);
  --shadow:0 12px 34px rgba(15,42,84,.09);
  --shadow-l:0 26px 64px rgba(8,25,47,.22);
  --shell:1180px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;letter-spacing:-.01em;}
p{margin:0;}
ul,dl,dd{margin:0;padding:0;}
li{list-style:none;}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 24px;}

/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-shell{display:flex;align-items:center;gap:28px;min-height:70px;position:relative;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:40px;height:40px;border-radius:12px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand-light),var(--brand-strong));
  color:#fff;font-size:18px;font-weight:700;
  box-shadow:0 8px 18px rgba(22,86,214,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:16px;color:var(--ink);letter-spacing:.01em;}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:.06em;}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:8px;}
.main-nav a{
  padding:9px 14px;border-radius:999px;font-size:15px;color:var(--ink-2);
  transition:background .18s ease,color .18s ease;
}
.main-nav a:hover{background:var(--brand-soft);color:var(--brand-strong);}
.main-nav a.is-active{background:var(--brand-soft);color:var(--brand-strong);font-weight:600;}
.main-nav a.nav-download{color:var(--brand);font-weight:600;}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:12px;}
.nav-search{display:flex;align-items:center;gap:8px;background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:5px 6px 5px 16px;}
.nav-search input{
  border:0;background:transparent;outline:none;font-size:14px;color:var(--ink);
  width:180px;padding:4px 0;
}
.nav-search input::placeholder{color:#9aabc2;}
.nav-search button{
  border:0;border-radius:999px;padding:6px 14px;font-size:13px;
  background:var(--brand);color:#fff;transition:background .18s ease;
}
.nav-search button:hover{background:var(--brand-strong);}
.nav-toggle{
  display:none;border:1px solid var(--line);background:#fff;border-radius:10px;
  padding:8px 12px;font-size:14px;color:var(--ink-2);
}
.nav-toggle:focus-visible,.main-nav a:focus-visible,.btn:focus-visible,.nav-search button:focus-visible{
  outline:3px solid rgba(47,116,232,.45);outline-offset:2px;
}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.4;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:linear-gradient(135deg,var(--brand-light),var(--brand));color:#fff;box-shadow:0 12px 26px rgba(22,86,214,.3);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 36px rgba(22,86,214,.38);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{border-color:rgba(255,255,255,.42);color:#eaf1ff;background:rgba(255,255,255,.06);}
.btn-ghost:hover{background:rgba(255,255,255,.16);}
.btn-line{background:#fff;color:var(--brand-strong);border-color:#d5e3fb;box-shadow:var(--shadow-s);}
.btn-line:hover{border-color:var(--brand-light);color:var(--brand);transform:translateY(-2px);}
.btn-block{width:100%;}

/* hero */
.hero{
  position:relative;overflow:hidden;color:#e9f1ff;
  background:
    radial-gradient(circle at 14% 12%,rgba(47,116,232,.38),transparent 52%),
    radial-gradient(circle at 88% 82%,rgba(201,146,47,.22),transparent 46%),
    linear-gradient(135deg,#071527 0%,#0b2a58 58%,#12408f 100%);
  padding:66px 0 74px;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 60% 40%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 60% 40%,#000 0%,transparent 78%);
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:52px;align-items:center;}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.16em;
  color:#8fb6ff;text-transform:uppercase;margin-bottom:14px;
}
.hero h1{
  font-size:clamp(27px,3.2vw,40px);line-height:1.28;color:#fff;margin-bottom:18px;
}
.hero-lead{font-size:16px;line-height:1.9;color:#c3d6f4;max-width:640px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.hero-badges span{
  font-size:13px;color:#cfe0fa;padding:6px 14px;border-radius:999px;
  border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.06);
}
.hero-panel{
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.18);
  border-radius:var(--radius-l);
  padding:24px 24px 18px;
  box-shadow:var(--shadow-l);
  backdrop-filter:blur(8px);
  min-width:0;
}
.hero-panel h2{font-size:16px;color:#fff;margin-bottom:6px;}
.hero-panel .panel-note{font-size:13px;color:#a9c3e6;margin-bottom:14px;}
.panel-row{display:flex;gap:14px;justify-content:space-between;align-items:flex-start;padding:13px 0;border-bottom:1px dashed rgba(255,255,255,.16);min-width:0;}
.panel-row:last-child{border-bottom:0;}
.panel-row dt{font-size:14px;font-weight:600;color:#e7f0ff;flex:0 0 88px;}
.panel-row dd{font-size:13.5px;line-height:1.7;color:#aec7e8;min-width:0;}

/* sections */
.section{padding:70px 0;}
.section--soft{background:#fff;}
.section--tight{padding:56px 0;}
.section-head{max-width:820px;margin-bottom:36px;}
.section-head h2{font-size:clamp(22px,2.4vw,30px);color:var(--ink);margin-bottom:12px;}
.section-head p{font-size:15.5px;color:var(--muted);}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}

/* grids */
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.grid-4>*,.grid-3>*,.grid-2>*{min-width:0;}

/* cards */
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-s);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  min-width:0;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cfe0ff;}
.card h3{font-size:16.5px;margin-bottom:10px;color:var(--ink);}
.card p{font-size:14.5px;color:var(--ink-2);line-height:1.8;}
.metric-card .metric-label{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.1em;
  color:var(--brand);background:var(--brand-soft);border-radius:999px;padding:4px 12px;margin-bottom:14px;
}
.metric-card h3{font-size:17px;}
.matrix-card{position:relative;padding-top:30px;}
.matrix-card .num{
  position:absolute;top:20px;right:22px;font-size:26px;font-weight:700;
  color:#e7eefb;line-height:1;
}
.matrix-card h3{font-size:16.5px;}

/* download */
.download-band{
  background:linear-gradient(135deg,#f0f6ff 0%,#e7efff 100%);
  border-top:1px solid #dce8fb;border-bottom:1px solid #dce8fb;
}
.download-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px;}
.download-head h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:10px;}
.download-head p{font-size:15px;color:var(--ink-2);max-width:660px;}
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.dl-card{
  background:#fff;border:1px solid #d8e5fb;border-radius:var(--radius);
  padding:24px;display:flex;flex-direction:column;gap:10px;min-width:0;
  box-shadow:var(--shadow-s);transition:transform .2s ease,box-shadow .2s ease;
}
.dl-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.dl-card .dl-tag{
  align-self:flex-start;font-size:12px;font-weight:700;color:var(--brand-strong);
  background:var(--brand-soft);border-radius:999px;padding:4px 12px;
}
.dl-card h3{font-size:17px;}
.dl-card p{font-size:14px;color:var(--muted);flex:1;line-height:1.75;}
.dl-card .btn{margin-top:6px;}

/* compare */
.compare-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-s);min-width:0;}
.compare-card .bar{height:6px;background:#d5e3fb;}
.compare-card.is-accent .bar{background:linear-gradient(90deg,var(--brand-light),var(--brand-strong));}
.compare-card .compare-body{padding:26px 24px;}
.compare-card h3{font-size:17px;margin-bottom:14px;}
.compare-list li{
  font-size:14.5px;color:var(--ink-2);padding:9px 0 9px 18px;position:relative;
  border-bottom:1px dashed var(--line);
}
.compare-list li:last-child{border-bottom:0;}
.compare-list li::before{
  content:"";position:absolute;left:0;top:19px;width:6px;height:6px;border-radius:50%;
  background:var(--brand-light);
}

/* steps */
.steps{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:18px;counter-reset:step;}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 20px;box-shadow:var(--shadow-s);min-width:0;position:relative;
}
.step .step-num{
  width:32px;height:32px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand-strong);font-weight:700;font-size:14px;margin-bottom:14px;
}
.step h3{font-size:15.5px;margin-bottom:8px;}
.step p{font-size:14px;color:var(--muted);line-height:1.75;}

/* topic entry */
.topic-banner{
  display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:32px;align-items:center;
  background:linear-gradient(120deg,#0b2a58,#12408f);color:#eaf2ff;
  border-radius:var(--radius-l);padding:38px 36px;box-shadow:var(--shadow);
}
.topic-banner h2{font-size:clamp(20px,2.2vw,26px);color:#fff;margin-bottom:12px;}
.topic-banner p{font-size:15px;color:#c2d6f4;line-height:1.85;}
.topic-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px;}
.topic-tags span{
  font-size:13px;padding:6px 13px;border-radius:999px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);color:#dbe8fb;
}
.topic-cta{display:flex;flex-direction:column;gap:12px;align-items:flex-start;}
.topic-cta .btn-line{background:#fff;color:var(--brand-strong);border-color:transparent;}
.topic-cta .note{font-size:13px;color:#a9c3e6;}

/* news */
.news-layout{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(0,1fr);gap:34px;align-items:start;}
.news-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:10px 26px;box-shadow:var(--shadow-s);min-width:0;}
.news-item{display:block;padding:20px 0;border-bottom:1px solid var(--line);transition:padding-left .2s ease;}
.news-item:last-child{border-bottom:0;}
.news-item:hover{padding-left:6px;}
.news-item h3{font-size:16.5px;margin-bottom:8px;color:var(--ink);transition:color .18s ease;}
.news-item:hover h3{color:var(--brand);}
.news-item p{font-size:14px;color:var(--muted);line-height:1.75;}
.news-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px;}
.news-meta span{font-size:12.5px;color:#8ea3bb;background:var(--bg);border-radius:999px;padding:3px 11px;}
.side-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-s);min-width:0;}
.side-panel h3{font-size:16px;margin-bottom:14px;}
.side-item{padding:12px 0;border-bottom:1px dashed var(--line);}
.side-item:last-child{border-bottom:0;}
.side-item a{font-size:14.5px;color:var(--ink-2);line-height:1.7;display:block;transition:color .18s ease;}
.side-item a:hover{color:var(--brand);}
.side-item .side-date{font-size:12.5px;color:#8ea3bb;display:block;margin-top:4px;}
.empty-note{font-size:14px;color:var(--muted);padding:26px 0;}

/* opinion */
.opinion-card{border-left:3px solid var(--brand-light);background:#fff;border-radius:0 var(--radius) var(--radius) 0;padding:24px;box-shadow:var(--shadow-s);min-width:0;}
.opinion-card h3{font-size:16.5px;margin-bottom:10px;}
.opinion-card p{font-size:14.5px;color:var(--ink-2);line-height:1.85;}
.opinion-card .opinion-tag{font-size:12.5px;color:var(--brand);font-weight:700;letter-spacing:.08em;display:block;margin-bottom:8px;}

/* data bars */
.data-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow-s);min-width:0;}
.bar-row{display:grid;grid-template-columns:96px minmax(0,1fr) 92px;gap:16px;align-items:center;padding:11px 0;}
.bar-row dt{font-size:14.5px;color:var(--ink-2);font-weight:600;}
.bar-row dd{font-size:14px;color:var(--brand-strong);font-weight:600;text-align:right;}
.bar-track{height:12px;border-radius:999px;background:#eef3fb;overflow:hidden;}
.bar-fill{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand-light),var(--brand-strong));}
.data-note{font-size:13.5px;color:var(--muted);margin-top:18px;line-height:1.8;}

/* safeguards */
.safe-card{display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-s);min-width:0;}
.safe-icon{
  flex:0 0 44px;width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand-strong);font-weight:700;font-size:15px;
}
.safe-card h3{font-size:16px;margin-bottom:8px;}
.safe-card p{font-size:14.5px;color:var(--ink-2);line-height:1.8;}

/* qa */
.qa-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.qa-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-s);min-width:0;}
.qa-card h3{font-size:15.5px;margin-bottom:10px;color:var(--brand-strong);}
.qa-card p{font-size:14.5px;color:var(--ink-2);line-height:1.85;}

/* cta */
.cta-band{
  background:linear-gradient(120deg,#08192f,#0f3670);
  color:#eaf2ff;border-radius:var(--radius-l);padding:44px 40px;
  display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:32px;align-items:center;
  box-shadow:var(--shadow-l);
}
.cta-band h2{font-size:clamp(20px,2.3vw,27px);color:#fff;margin-bottom:12px;}
.cta-band p{font-size:14.5px;color:#b9cde9;line-height:1.85;}
.cta-actions{display:flex;flex-direction:column;gap:12px;}
.cta-actions .btn{width:100%;}

/* footer */
.site-footer{background:var(--brand-deep);color:#a8bdd8;padding:58px 0 26px;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-mark{box-shadow:none;}
.footer-brand strong{color:#fff;font-size:16px;}
.footer-brand em{font-style:normal;display:block;font-size:12px;color:#7f97b6;letter-spacing:.06em;}
.footer-about p{line-height:1.9;color:#95abc9;font-size:13.5px;}
.footer-col h3{color:#fff;font-size:14.5px;margin-bottom:14px;}
.footer-col li{margin-bottom:10px;}
.footer-col a{color:#a8bdd8;font-size:13.5px;transition:color .18s ease;}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  margin-top:38px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:#7f97b6;
}
.footer-warn{color:#8ba2c1;font-size:13px;line-height:1.8;margin-top:20px;}

/* responsive */
@media (max-width:1024px){
  .nav-search{display:none;}
  .hero-grid{grid-template-columns:1fr;gap:38px;}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .steps{grid-template-columns:repeat(3,minmax(0,1fr));}
  .news-layout{grid-template-columns:1fr;}
  .topic-banner{grid-template-columns:1fr;padding:32px 28px;}
  .cta-band{grid-template-columns:1fr;padding:34px 28px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:768px){
  .nav-shell{flex-wrap:wrap;min-height:64px;padding-top:10px;padding-bottom:10px;gap:12px;}
  .nav-toggle{display:inline-flex;margin-left:auto;}
  .nav-tools{margin-left:0;}
  .main-nav{
    display:none;position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;
    background:#fff;padding:14px 20px 18px;border-bottom:1px solid var(--line);
    box-shadow:var(--shadow);margin-left:0;
  }
  .main-nav.is-open{display:flex;}
  .main-nav a{padding:11px 14px;border-radius:12px;}
  .section{padding:52px 0;}
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .dl-grid{grid-template-columns:1fr;}
  .qa-grid{grid-template-columns:1fr;}
  .hero{padding:48px 0 56px;}
  .hero-panel{padding:20px;}
  .panel-row{flex-direction:column;gap:4px;}
  .panel-row dt{flex:none;}
  .bar-row{grid-template-columns:80px minmax(0,1fr) 72px;gap:10px;}
  .news-panel{padding:6px 18px;}
  .data-panel{padding:22px;}
  .footer-grid{grid-template-columns:1fr;}
}
@media (max-width:520px){
  .shell{padding:0 18px;}
  .hero h1{font-size:24px;}
  .hero-lead{font-size:15px;}
  .hero-actions .btn{width:100%;}
  .section-head h2{font-size:21px;}
  .topic-banner,.cta-band{padding:26px 20px;}
  .footer-bottom{flex-direction:column;}
}

/* roulang page: article */
:root{
  --brand:#1656d6;
  --brand-strong:#0d3a9e;
  --brand-light:#2f74e8;
  --brand-soft:#eef4ff;
  --brand-deep:#08192f;
  --gold:#c9922f;
  --ink:#132338;
  --ink-2:#39506e;
  --muted:#63798f;
  --line:#e2e9f4;
  --bg:#f5f8fd;
  --white:#ffffff;
  --radius-s:10px;
  --radius:16px;
  --radius-l:22px;
  --shadow-s:0 4px 14px rgba(15,42,84,.06);
  --shadow:0 12px 34px rgba(15,42,84,.09);
  --shadow-l:0 26px 64px rgba(8,25,47,.22);
  --shell:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;letter-spacing:.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 24px;}
/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-shell{display:flex;align-items:center;gap:28px;min-height:70px;position:relative;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:40px;height:40px;border-radius:12px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand-light),var(--brand-strong));
  color:#fff;font-size:18px;font-weight:700;
  box-shadow:0 8px 18px rgba(22,86,214,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:16px;color:var(--ink);}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:.06em;}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:8px;}
.main-nav a{
  padding:9px 14px;border-radius:999px;font-size:15px;color:var(--ink-2);
  transition:background .18s ease,color .18s ease;white-space:nowrap;
}
.main-nav a:hover{background:var(--brand-soft);color:var(--brand-strong);}
.main-nav a.is-active{background:var(--brand-soft);color:var(--brand-strong);font-weight:600;}
.main-nav a.nav-download{color:var(--brand);font-weight:600;}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:12px;}
.nav-search{display:flex;align-items:center;gap:8px;background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:5px 6px 5px 16px;}
.nav-search input{
  border:0;background:transparent;outline:none;font-size:14px;color:var(--ink);
  width:170px;padding:4px 0;
}
.nav-search input::placeholder{color:#9aabc2;}
.nav-search button{
  border:0;border-radius:999px;padding:6px 14px;font-size:13px;
  background:var(--brand);color:#fff;transition:background .18s ease;
}
.nav-search button:hover{background:var(--brand-strong);}
.nav-toggle{
  display:none;border:1px solid var(--line);background:#fff;border-radius:10px;
  padding:8px 12px;font-size:14px;color:var(--ink-2);
}
.nav-toggle:focus-visible,.main-nav a:focus-visible,.btn:focus-visible,.nav-search button:focus-visible{
  outline:3px solid rgba(47,116,232,.45);outline-offset:2px;
}
/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.4;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:linear-gradient(135deg,var(--brand-light),var(--brand));color:#fff;box-shadow:0 12px 26px rgba(22,86,214,.3);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 36px rgba(22,86,214,.38);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{border-color:rgba(255,255,255,.42);color:#eaf1ff;background:rgba(255,255,255,.06);}
.btn-ghost:hover{background:rgba(255,255,255,.16);}
.btn-line{background:#fff;color:var(--brand-strong);border-color:#d5e3fb;box-shadow:var(--shadow-s);}
.btn-line:hover{border-color:var(--brand-light);color:var(--brand);transform:translateY(-2px);}
.btn-block{width:100%;}
/* article hero */
.article-hero{
  position:relative;overflow:hidden;color:#e9f1ff;
  background:
    radial-gradient(circle at 12% 10%,rgba(47,116,232,.38),transparent 54%),
    radial-gradient(circle at 90% 84%,rgba(201,146,47,.2),transparent 48%),
    linear-gradient(135deg,#071527 0%,#0b2a58 60%,#12408f 100%);
  padding:44px 0 54px;
}
.article-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 60% 40%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 60% 40%,#000 0%,transparent 78%);
}
.article-hero .shell{position:relative;z-index:2;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:#a9c3e6;margin-bottom:20px;}
.breadcrumb a{color:#cfe0fa;transition:color .18s ease;}
.breadcrumb a:hover{color:#fff;}
.breadcrumb span.sep{color:rgba(255,255,255,.35);}
.article-hero h1{
  font-size:clamp(24px,2.9vw,36px);line-height:1.34;color:#fff;
  max-width:900px;margin-bottom:16px;
}
.article-hero .hero-summary{max-width:780px;font-size:15.5px;line-height:1.9;color:#c3d6f4;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:22px;}
.meta-tag{
  font-size:13px;padding:5px 14px;border-radius:999px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.24);color:#dce8fb;
}
.meta-time{font-size:13px;color:#9fbbe0;}
/* section base */
.section{padding:64px 0;}
.section--soft{background:#fff;}
.section--tight{padding:52px 0;}
.section-head{max-width:800px;margin-bottom:34px;}
.section-head h2{font-size:clamp(21px,2.3vw,28px);color:var(--ink);margin-bottom:12px;}
.section-head p{font-size:15.5px;line-height:1.9;color:var(--ink-2);}
/* article layout */
.article-wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,320px);gap:36px;align-items:start;}
.article-main{min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius-l);padding:34px 36px;box-shadow:var(--shadow-s);}
.article-body{font-size:16px;line-height:1.95;color:var(--ink-2);min-width:0;overflow-wrap:break-word;}
.article-body h2{
  font-size:21px;color:var(--ink);margin:34px 0 14px;padding-left:14px;
  border-left:4px solid var(--brand);line-height:1.5;
}
.article-body h3{font-size:17.5px;color:var(--ink);margin:26px 0 10px;}
.article-body h4{font-size:16px;color:var(--ink);margin:20px 0 8px;}
.article-body p{margin:0 0 16px;}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px;list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:8px;}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(22,86,214,.3);}
.article-body a:hover{color:var(--brand-strong);border-bottom-color:var(--brand-strong);}
.article-body blockquote{
  margin:20px 0;padding:16px 20px;border-left:4px solid var(--brand-light);
  background:var(--brand-soft);border-radius:0 var(--radius-s) var(--radius-s) 0;color:var(--ink-2);
}
.article-body img{border-radius:var(--radius);margin:18px 0;box-shadow:var(--shadow-s);}
.article-body table{width:100%;border-collapse:collapse;margin:18px 0;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;}
.article-body th{background:var(--brand-soft);color:var(--brand-strong);font-weight:600;}
.article-body code{background:#f1f5fb;border-radius:6px;padding:2px 6px;font-size:14px;}
.article-empty{padding:14px 0 6px;}
.article-empty h2{font-size:20px;color:var(--ink);margin-bottom:12px;}
.article-empty p{color:var(--ink-2);margin-bottom:20px;}
/* side */
.article-side{display:flex;flex-direction:column;gap:20px;min-width:0;}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 22px;box-shadow:var(--shadow-s);
}
.side-card h3{font-size:15.5px;color:var(--ink);margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-card h3::before{content:"";width:6px;height:16px;border-radius:3px;background:var(--brand);display:inline-block;}
.side-list{display:flex;flex-direction:column;gap:12px;}
.side-list li{display:flex;justify-content:space-between;gap:14px;font-size:14px;color:var(--muted);}
.side-list li strong{color:var(--ink);font-weight:600;text-align:right;min-width:0;overflow-wrap:break-word;}
.side-note{font-size:13.5px;line-height:1.85;color:var(--muted);}
.side-card--warn{background:#fffaf0;border-color:#f0dfba;}
.side-card--warn h3::before{background:var(--gold);}
.side-card--warn p{font-size:13.5px;line-height:1.85;color:#8a6a2c;}
.side-dl{display:flex;flex-direction:column;gap:10px;}
.side-dl .btn{padding:10px 16px;font-size:14px;}
/* point grid */
.point-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.point-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-s);min-width:0;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.point-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfe0fb;}
.point-card .point-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;font-size:14px;font-weight:700;
  background:var(--brand-soft);color:var(--brand-strong);margin-bottom:14px;
}
.point-card h3{font-size:16.5px;color:var(--ink);margin-bottom:10px;}
.point-card p{font-size:14.5px;line-height:1.85;color:var(--ink-2);}
/* table */
.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-s);}
.calc-table{width:100%;border-collapse:collapse;font-size:15px;min-width:560px;}
.calc-table th{
  background:var(--brand-soft);color:var(--brand-strong);font-weight:600;
  padding:14px 18px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap;
}
.calc-table td{padding:14px 18px;border-bottom:1px solid var(--line);color:var(--ink-2);line-height:1.75;}
.calc-table tr:last-child td{border-bottom:0;}
.calc-table tr:hover td{background:#fafcff;}
.table-tip{font-size:13.5px;color:var(--muted);margin-top:14px;line-height:1.8;}
/* download band */
.download-band{
  position:relative;overflow:hidden;color:#eaf1ff;border-radius:var(--radius-l);
  background:linear-gradient(135deg,#0b2242 0%,#123a78 62%,#1a4fa5 100%);
  padding:40px 40px;box-shadow:var(--shadow-l);
}
.download-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,116,232,.5),transparent 68%);
}
.download-inner{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px;align-items:center;}
.download-band h2{font-size:clamp(20px,2.2vw,26px);color:#fff;margin-bottom:12px;}
.download-band p{font-size:14.5px;line-height:1.9;color:#b7cdea;}
.download-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;}
.dl-btn{
  display:flex;flex-direction:column;align-items:flex-start;gap:4px;
  padding:14px 16px;border-radius:var(--radius);min-width:0;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.22);
  color:#fff;transition:background .18s ease,transform .18s ease,border-color .18s ease;
}
.dl-btn:hover{background:rgba(255,255,255,.18);transform:translateY(-3px);border-color:rgba(255,255,255,.4);}
.dl-btn strong{font-size:15px;font-weight:600;}
.dl-btn span{font-size:12px;color:#a9c3e6;overflow-wrap:break-word;}
/* faq */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:920px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-s);overflow:hidden;transition:border-color .18s ease;
}
.faq-item[open]{border-color:#cfe0fb;}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;font-size:16px;font-weight:600;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";font-size:20px;font-weight:400;color:var(--brand);line-height:1;flex-shrink:0;
  transition:transform .2s ease;
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item .faq-body{padding:0 22px 20px;font-size:14.5px;line-height:1.9;color:var(--ink-2);}
/* entry links */
.entry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.entry-card{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow-s);min-width:0;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfe0fb;}
.entry-card h3{font-size:16px;color:var(--ink);margin-bottom:8px;}
.entry-card p{font-size:14px;line-height:1.8;color:var(--muted);}
.entry-card .entry-more{display:inline-block;margin-top:14px;font-size:14px;font-weight:600;color:var(--brand);}
/* footer */
.site-footer{background:#08192f;color:#a9bcda;padding:56px 0 26px;margin-top:10px;}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));gap:34px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand strong{display:block;color:#fff;font-size:16px;}
.footer-brand em{font-style:normal;font-size:12px;color:#7f97b8;letter-spacing:.06em;}
.footer-about p{font-size:14px;line-height:1.9;color:#8fa6c6;max-width:400px;}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:14px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:#9fb4d2;transition:color .18s ease;}
.footer-col a:hover{color:#fff;}
.footer-warn{
  margin-top:34px;padding:16px 20px;border-radius:var(--radius-s);
  background:rgba(201,146,47,.1);border:1px solid rgba(201,146,47,.28);
  font-size:13px;line-height:1.85;color:#d3b271;
}
.footer-bottom{
  margin-top:22px;padding-top:18px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13px;color:#7f97b8;
}
/* responsive */
@media (max-width:1024px){
  .article-wrap{grid-template-columns:minmax(0,1fr);}
  .article-side{flex-direction:row;flex-wrap:wrap;}
  .article-side .side-card{flex:1 1 280px;}
  .point-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .download-inner{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:920px){
  .nav-shell{flex-wrap:wrap;gap:14px;padding-top:12px;padding-bottom:12px;}
  .nav-toggle{display:inline-flex;margin-left:auto;}
  .nav-tools{display:none;}
  .main-nav{
    display:none;width:100%;flex-direction:column;align-items:stretch;gap:4px;
    margin-left:0;padding-top:8px;
  }
  .main-nav.is-open{display:flex;}
  .main-nav a{padding:11px 14px;border-radius:var(--radius-s);}
}
@media (max-width:768px){
  .section{padding:48px 0;}
  .article-main{padding:26px 20px;border-radius:var(--radius);}
  .article-body{font-size:15.5px;}
  .point-grid{grid-template-columns:minmax(0,1fr);}
  .entry-grid{grid-template-columns:minmax(0,1fr);}
  .download-band{padding:28px 22px;}
  .download-actions{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px;}
  .article-hero{padding:34px 0 44px;}
}
@media (max-width:520px){
  .shell{padding:0 16px;}
  .brand-text strong{font-size:15px;}
  .article-main{padding:22px 16px;}
  .article-body h2{font-size:19px;}
  .faq-item summary{font-size:15px;padding:16px 16px;}
  .faq-item .faq-body{padding:0 16px 18px;}
  .side-card{padding:18px;}
  .footer-bottom{flex-direction:column;}
}

/* roulang page: category1 */
:root{
  --brand:#1656d6;
  --brand-strong:#0d3a9e;
  --brand-light:#2f74e8;
  --brand-soft:#eef4ff;
  --brand-deep:#08192f;
  --gold:#c9922f;
  --ink:#132338;
  --ink-2:#39506e;
  --muted:#63798f;
  --line:#e2e9f4;
  --bg:#f5f8fd;
  --white:#ffffff;
  --radius-s:10px;
  --radius:16px;
  --radius-l:22px;
  --shadow-s:0 4px 14px rgba(15,42,84,.06);
  --shadow:0 12px 34px rgba(15,42,84,.09);
  --shadow-l:0 26px 64px rgba(8,25,47,.22);
  --shell:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
dl,dd,dt{margin:0;}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 22px;}
/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-shell{display:flex;align-items:center;gap:28px;min-height:70px;position:relative;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:40px;height:40px;border-radius:12px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand-light),var(--brand-strong));
  color:#fff;font-size:18px;font-weight:700;
  box-shadow:0 8px 18px rgba(22,86,214,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:16px;color:var(--ink);letter-spacing:.01em;}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:.06em;}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:8px;}
.main-nav a{
  padding:9px 14px;border-radius:999px;font-size:15px;color:var(--ink-2);
  transition:background .18s ease,color .18s ease;
}
.main-nav a:hover{background:var(--brand-soft);color:var(--brand-strong);}
.main-nav a.is-active{background:var(--brand-soft);color:var(--brand-strong);font-weight:600;}
.main-nav a.nav-download{color:var(--brand);font-weight:600;}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:12px;}
.nav-search{display:flex;align-items:center;gap:8px;background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:5px 6px 5px 16px;}
.nav-search input{border:0;background:transparent;outline:none;font-size:14px;color:var(--ink);width:180px;padding:4px 0;}
.nav-search input::placeholder{color:#9aabc2;}
.nav-search button{
  border:0;border-radius:999px;padding:6px 14px;font-size:13px;
  background:var(--brand);color:#fff;transition:background .18s ease;
}
.nav-search button:hover{background:var(--brand-strong);}
.nav-toggle{
  display:none;border:1px solid var(--line);background:#fff;border-radius:10px;
  padding:8px 12px;font-size:14px;color:var(--ink-2);
}
.nav-toggle:focus-visible,.main-nav a:focus-visible,.btn:focus-visible,.nav-search button:focus-visible{
  outline:3px solid rgba(47,116,232,.45);outline-offset:2px;
}
/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.4;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:linear-gradient(135deg,var(--brand-light),var(--brand));color:#fff;box-shadow:0 12px 26px rgba(22,86,214,.3);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 36px rgba(22,86,214,.38);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{border-color:rgba(255,255,255,.42);color:#eaf1ff;background:rgba(255,255,255,.06);}
.btn-ghost:hover{background:rgba(255,255,255,.16);}
.btn-line{background:#fff;color:var(--brand-strong);border-color:#d5e3fb;box-shadow:var(--shadow-s);}
.btn-line:hover{border-color:var(--brand-light);color:var(--brand);transform:translateY(-2px);}
.btn-block{width:100%;}
/* page hero */
.page-hero{
  position:relative;overflow:hidden;color:#e9f1ff;
  background:
    radial-gradient(circle at 12% 8%,rgba(47,116,232,.38),transparent 52%),
    radial-gradient(circle at 92% 88%,rgba(201,146,47,.2),transparent 46%),
    linear-gradient(135deg,#071527 0%,#0b2a58 58%,#12408f 100%);
  padding:52px 0 60px;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 60% 40%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 60% 40%,#000 0%,transparent 78%);
}
.page-hero .shell{position:relative;z-index:2;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:#9fbde6;margin-bottom:18px;}
.crumb a{color:#cfe0fa;border-bottom:1px solid transparent;transition:border-color .18s ease;}
.crumb a:hover{border-color:#cfe0fa;}
.crumb span.sep{color:rgba(255,255,255,.35);}
.hero-inner{max-width:850px;}
.page-hero h1{font-size:clamp(24px,3vw,34px);color:#fff;margin-bottom:16px;}
.page-hero .hero-lead{font-size:15.5px;line-height:1.95;color:#c3d6f4;max-width:780px;}
.var-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:30px;}
.var-card{
  min-width:0;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.17);
  border-radius:14px;padding:15px 16px;transition:background .2s ease,transform .2s ease;
}
.var-card:hover{background:rgba(255,255,255,.13);transform:translateY(-2px);}
.var-card strong{display:block;font-size:14.5px;color:#fff;margin-bottom:5px;}
.var-card span{font-size:13px;line-height:1.7;color:#aec7e8;}
/* sections */
.section{padding:70px 0;}
.section--soft{background:#fff;}
.section--tight{padding:56px 0;}
.section-head{max-width:820px;margin-bottom:36px;}
.section-head h2{font-size:clamp(22px,2.4vw,30px);color:var(--ink);margin-bottom:12px;}
.section-head p{font-size:15.5px;color:var(--ink-2);line-height:1.9;}
.eyebrow{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.16em;color:var(--brand);text-transform:uppercase;margin-bottom:12px;}
/* feature cards */
.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.feature-card{
  min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;box-shadow:var(--shadow-s);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfdffa;}
.feature-card .f-index{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;background:var(--brand-soft);
  color:var(--brand-strong);font-size:14px;font-weight:700;margin-bottom:14px;
}
.feature-card h3{font-size:16.5px;margin-bottom:9px;color:var(--ink);}
.feature-card p{font-size:14.5px;line-height:1.85;color:var(--ink-2);}
/* scene cards */
.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.scene-card{
  min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-s);border-top:3px solid var(--brand-light);
  transition:transform .2s ease,box-shadow .2s ease;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.scene-card h3{font-size:17px;margin-bottom:10px;}
.scene-card p{font-size:14.5px;line-height:1.85;color:var(--ink-2);}
.scene-card ul{margin-top:14px;display:grid;gap:8px;}
.scene-card li{position:relative;padding-left:18px;font-size:14px;color:var(--ink-2);line-height:1.75;}
.scene-card li::before{
  content:"";position:absolute;left:0;top:.62em;width:7px;height:7px;border-radius:50%;
  background:var(--brand-light);
}
/* flow */
.flow-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;counter-reset:step;}
.flow-step{
  min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px 22px;box-shadow:var(--shadow-s);position:relative;
}
.flow-step::before{
  counter-increment:step;content:counter(step);
  display:flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:50%;margin-bottom:14px;
  background:linear-gradient(140deg,var(--brand-light),var(--brand-strong));
  color:#fff;font-size:14px;font-weight:700;
}
.flow-step h3{font-size:16px;margin-bottom:8px;}
.flow-step p{font-size:14px;line-height:1.8;color:var(--ink-2);}
/* compare */
.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.compare-card{
  min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius-l);
  padding:26px 26px 22px;box-shadow:var(--shadow-s);
}
.compare-card h3{font-size:17.5px;margin-bottom:6px;}
.compare-card .compare-sub{font-size:13.5px;color:var(--muted);margin-bottom:16px;}
.compare-list{display:grid;gap:12px;}
.compare-list li{
  min-width:0;display:grid;grid-template-columns:96px minmax(0,1fr);gap:12px;
  padding-bottom:12px;border-bottom:1px dashed var(--line);font-size:14.3px;line-height:1.8;color:var(--ink-2);
}
.compare-list li:last-child{border-bottom:0;padding-bottom:0;}
.compare-list b{color:var(--ink);font-size:14px;font-weight:600;}
/* risk band */
.risk-band{
  background:linear-gradient(140deg,#071527,#0d2b56 62%,#123f86);
  color:#d9e6fa;padding:66px 0;position:relative;overflow:hidden;
}
.risk-band::after{
  content:"";position:absolute;right:-120px;top:-120px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,116,232,.35),transparent 68%);
}
.risk-band .shell{position:relative;z-index:2;}
.risk-band h2{color:#fff;font-size:clamp(22px,2.4vw,29px);margin-bottom:12px;}
.risk-band .risk-lead{font-size:15.5px;line-height:1.9;color:#b9cfec;max-width:780px;}
.risk-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:32px;}
.risk-item{
  min-width:0;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);
  border-radius:var(--radius);padding:22px 20px;
}
.risk-item h3{font-size:16px;color:#fff;margin-bottom:8px;}
.risk-item p{font-size:14px;line-height:1.85;color:#b3cae9;}
.risk-note{
  margin-top:26px;font-size:13.5px;line-height:1.85;color:#9fbde6;
  border-left:3px solid rgba(201,146,47,.75);padding-left:14px;max-width:860px;
}
/* mistake list */
.mistake-list{display:grid;gap:14px;}
.mistake-item{
  min-width:0;display:grid;grid-template-columns:auto minmax(0,1fr);gap:16px;align-items:start;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 22px;box-shadow:var(--shadow-s);
}
.mistake-item .m-tag{
  display:inline-flex;align-items:center;justify-content:center;
  font-size:12.5px;font-weight:700;color:#8a5b12;background:#fdf3e0;
  border:1px solid #f0dcb6;border-radius:999px;padding:5px 12px;white-space:nowrap;
}
.mistake-item h3{font-size:16px;margin-bottom:6px;}
.mistake-item p{font-size:14.4px;line-height:1.85;color:var(--ink-2);}
/* posts */
.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.post-card{
  min-width:0;display:flex;flex-direction:column;gap:10px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 22px 20px;box-shadow:var(--shadow-s);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfdffa;}
.post-title{font-size:16.5px;font-weight:700;line-height:1.55;color:var(--ink);transition:color .18s ease;}
.post-title:hover{color:var(--brand);}
.post-excerpt{font-size:14.3px;line-height:1.8;color:var(--ink-2);}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:auto;font-size:13px;color:var(--muted);}
.post-meta .tag{background:var(--brand-soft);color:var(--brand-strong);border-radius:999px;padding:3px 11px;font-size:12.5px;}
.post-empty{
  background:#fff;border:1px dashed var(--line);border-radius:var(--radius);
  padding:28px;text-align:center;color:var(--muted);font-size:14.5px;
}
.list-more{margin-top:30px;display:flex;justify-content:center;}
/* faq */
.faq-list{display:grid;gap:14px;max-width:920px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-s);overflow:hidden;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.faq-item[open]{border-color:#cfdffa;box-shadow:var(--shadow);}
.faq-item summary{
  cursor:pointer;list-style:none;padding:20px 24px;font-size:16px;font-weight:600;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";flex-shrink:0;width:26px;height:26px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand-strong);font-size:17px;font-weight:700;
  transition:transform .2s ease;
}
.faq-item[open] summary::after{content:"−";}
.faq-item .faq-body{padding:0 24px 22px;font-size:14.6px;line-height:1.9;color:var(--ink-2);}
/* download */
.download-band{background:#fff;}
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.dl-card{
  min-width:0;background:linear-gradient(180deg,#f8fbff,#fff);
  border:1px solid var(--line);border-radius:var(--radius-l);
  padding:26px 24px;box-shadow:var(--shadow-s);
  display:flex;flex-direction:column;gap:10px;
  transition:transform .2s ease,box-shadow .2s ease;
}
.dl-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.dl-tag{
  align-self:flex-start;font-size:12.5px;font-weight:700;color:var(--brand-strong);
  background:var(--brand-soft);border-radius:999px;padding:4px 12px;
}
.dl-card h3{font-size:17px;}
.dl-card p{font-size:14.2px;line-height:1.8;color:var(--ink-2);}
.dl-file{font-size:13px;color:var(--muted);letter-spacing:.02em;}
.dl-card .btn{margin-top:6px;}
.dl-warn{margin-top:22px;font-size:13.5px;line-height:1.8;color:var(--muted);max-width:900px;}
/* cta close */
.cta-band{
  background:linear-gradient(135deg,#0b2a58,#1656d6);
  color:#eaf1ff;padding:58px 0;
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-inner h2{color:#fff;font-size:clamp(21px,2.3vw,27px);margin-bottom:10px;}
.cta-inner p{font-size:15px;line-height:1.9;color:#c8dcf7;max-width:660px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
/* footer */
.site-footer{background:#071527;color:#a7bdd9;padding:58px 0 26px;margin-top:0;}
.footer-grid{
  display:grid;grid-template-columns:minmax(0,1.7fr) repeat(3,minmax(0,1fr));
  gap:34px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand strong{display:block;font-size:16px;color:#fff;}
.footer-brand em{font-style:normal;font-size:12.5px;color:#8aa6c6;letter-spacing:.05em;}
.footer-about p{font-size:14px;line-height:1.9;color:#93aecd;max-width:420px;}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:14px;}
.footer-col ul{display:grid;gap:9px;}
.footer-col a{font-size:14px;color:#9db7d6;transition:color .18s ease;}
.footer-col a:hover{color:#fff;}
.footer-warn{
  margin:26px 0 0;font-size:13px;line-height:1.9;color:#7f9bb9;
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.09);
  border-radius:var(--radius-s);padding:16px 18px;
}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  margin-top:22px;font-size:13px;color:#7c96b4;
}
/* responsive */
@media (max-width:1024px){
  .feature-grid,.flow-grid,.var-grid,.post-grid,.risk-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .nav-search input{width:130px;}
  .section{padding:58px 0;}
}
@media (max-width:768px){
  .nav-toggle{display:inline-flex;}
  .main-nav{
    display:none;position:absolute;left:0;right:0;top:100%;
    background:#fff;flex-direction:column;align-items:stretch;gap:4px;
    padding:10px 16px 16px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);
  }
  .main-nav.is-open{display:flex;}
  .main-nav a{padding:11px 12px;border-radius:10px;font-size:15px;}
  .nav-tools{display:none;}
  .nav-shell{min-height:62px;}
  .page-hero{padding:40px 0 46px;}
  .compare-grid,.dl-grid{grid-template-columns:1fr;}
  .risk-band{padding:52px 0;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .shell{padding:0 16px;}
  .feature-grid,.scene-grid,.flow-grid,.var-grid,.post-grid,.risk-grid,.footer-grid{grid-template-columns:1fr;}
  .section{padding:44px 0;}
  .compare-list li{grid-template-columns:1fr;gap:2px;}
  .mistake-item{grid-template-columns:1fr;gap:10px;}
  .faq-item summary{padding:16px 18px;font-size:15px;}
  .faq-item .faq-body{padding:0 18px 18px;}
  .btn{width:100%;}
  .cta-actions{width:100%;}
}