/* roulang page: index */
:root{
  --brand:#1652c8;
  --brand-deep:#0d2c66;
  --brand-soft:#eaf1ff;
  --accent:#f2a83b;
  --bg:#f5f8fd;
  --surface:#ffffff;
  --text:#16233a;
  --muted:#5b6b85;
  --border:#e3e9f4;
  --radius-lg:22px;
  --radius:14px;
  --radius-sm:10px;
  --shadow-sm:0 4px 14px rgba(15,42,88,.06);
  --shadow:0 14px 36px rgba(15,42,88,.09);
  --shadow-lg:0 24px 60px rgba(13,44,102,.2);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6,p,figure{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
button{font-family:inherit}
.site-container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section-alt{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section-head{max-width:780px;margin-bottom:34px}
.section-head h2{
  font-size:clamp(22px,2.4vw,30px);
  line-height:1.4;
  font-weight:700;
  color:var(--brand-deep);
  margin-bottom:12px;
  letter-spacing:.2px;
}
.section-head p{color:var(--muted);font-size:15.5px;line-height:1.85}
.section-head.is-center{margin-left:auto;margin-right:auto;text-align:center}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand-soft);color:var(--brand);
  border:1px solid rgba(22,82,200,.16);
  border-radius:999px;padding:6px 16px;font-size:13px;font-weight:600;letter-spacing:.4px;
}
.tag{
  display:inline-block;background:var(--brand-soft);color:var(--brand);
  border-radius:999px;padding:3px 12px;font-size:12.5px;font-weight:600;white-space:nowrap;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease;
  text-align:center;line-height:1.3;
}
.btn:focus-visible{outline:3px solid rgba(22,82,200,.35);outline-offset:3px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(22,82,200,.26)}
.btn-primary:hover{background:#1044a9;transform:translateY(-2px);box-shadow:0 16px 32px rgba(22,82,200,.32)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--brand-deep);border-color:rgba(13,44,102,.18);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-sm{padding:10px 20px;font-size:14px}
.btn-light{background:#fff;color:var(--brand-deep)}
.btn-light:hover{background:#eef4ff;transform:translateY(-2px)}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-outline-light:hover{background:rgba(255,255,255,.14);border-color:#fff;transform:translateY(-2px)}

/* header */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(255,255,255,.97);
  border-bottom:1px solid var(--border);
  box-shadow:0 2px 12px rgba(15,42,88,.04);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:74px;position:relative}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  width:44px;height:44px;flex:0 0 auto;border-radius:13px;
  background:linear-gradient(140deg,#1f6be0,#0d2c66);
  color:#fff;display:grid;place-items:center;font-size:19px;font-weight:700;
  box-shadow:0 8px 18px rgba(22,82,200,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:17px;color:var(--brand-deep);letter-spacing:.3px;white-space:nowrap}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:1.4px}
.site-nav{display:flex;align-items:center;gap:6px}
.nav-link{
  padding:9px 16px;border-radius:999px;font-size:15px;color:#3b4a63;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease;white-space:nowrap;
}
.nav-link:hover{background:var(--brand-soft);color:var(--brand)}
.nav-link:focus-visible{outline:3px solid rgba(22,82,200,.3);outline-offset:2px}
.nav-link.is-active{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(22,82,200,.24)}
.header-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:4.5px;
  width:42px;height:42px;border-radius:12px;border:1px solid var(--border);
  background:#fff;cursor:pointer;padding:0 11px;
}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--brand-deep);transition:.2s}
.nav-toggle:hover{background:var(--brand-soft)}

/* hero */
.hero{
  position:relative;overflow:hidden;
  padding:66px 0 76px;
  background:linear-gradient(180deg,#eef4ff 0%,#f7faff 58%,var(--bg) 100%);
}
.hero::before{
  content:"";position:absolute;width:560px;height:560px;right:-180px;top:-230px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,82,200,.16),rgba(22,82,200,0) 66%);
}
.hero-inner{
  position:relative;display:grid;
  grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);
  gap:52px;align-items:center;
}
.hero-copy h1{
  font-size:clamp(27px,3.1vw,40px);
  line-height:1.35;
  font-weight:800;
  color:var(--brand-deep);
  margin:18px 0 18px;
  letter-spacing:.2px;
}
.hero-lead{color:#43536e;font-size:16px;line-height:1.9;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:24px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px}
.hero-tags li{
  font-size:13.5px;color:var(--brand-deep);background:#fff;
  border:1px solid var(--border);border-radius:999px;padding:6px 15px;box-shadow:var(--shadow-sm);
}
.hero-panel{display:grid;gap:16px}
.panel-card{border-radius:var(--radius-lg);padding:24px;min-width:0}
.panel-main{background:#fff;border:1px solid var(--border);box-shadow:var(--shadow)}
.panel-main h2{font-size:16px;font-weight:700;color:var(--brand-deep);margin-bottom:14px;letter-spacing:.4px}
.panel-list li{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:11px 0;border-bottom:1px dashed var(--border);font-size:14.5px;
}
.panel-list li:last-child{border-bottom:0;padding-bottom:0}
.panel-list span{color:var(--muted)}
.panel-list strong{color:var(--brand-deep);font-weight:600;white-space:nowrap}
.panel-sub{background:linear-gradient(135deg,#0d2c66,#1652c8);color:#fff;box-shadow:var(--shadow-lg)}
.panel-sub-title{font-size:14px;letter-spacing:1px;color:rgba(255,255,255,.78);margin-bottom:14px}
.panel-dl{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.panel-dl a{
  display:block;text-align:center;padding:11px 6px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);
  font-size:13.5px;font-weight:600;transition:.2s;
}
.panel-dl a:hover{background:rgba(255,255,255,.26);transform:translateY(-2px)}

/* download */
.download-section{padding-top:0}
.download-shell{
  background:linear-gradient(135deg,#0d2c66 0%,#1652c8 58%,#1f6be0 100%);
  border-radius:26px;padding:46px;color:#fff;box-shadow:var(--shadow-lg);
  display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);
  gap:38px;align-items:center;
}
.download-copy h2{font-size:clamp(21px,2.2vw,27px);font-weight:700;line-height:1.45;margin-bottom:12px}
.download-copy p{font-size:15px;color:rgba(255,255,255,.86);line-height:1.85}
.download-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.dl-card{
  display:flex;flex-direction:column;gap:8px;min-width:0;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.26);
  border-radius:16px;padding:20px 18px;transition:transform .22s ease,background .22s ease,box-shadow .22s ease;
}
.dl-card:hover{background:rgba(255,255,255,.22);transform:translateY(-4px);box-shadow:0 16px 32px rgba(0,0,0,.18)}
.dl-card:focus-visible{outline:3px solid rgba(255,255,255,.7);outline-offset:3px}
.dl-card svg{width:26px;height:26px;stroke:#fff;fill:none;stroke-width:1.8}
.dl-card strong{font-size:15.5px;font-weight:600}
.dl-card em{font-style:normal;font-size:12.5px;color:rgba(255,255,255,.75);letter-spacing:.4px;word-break:break-word}

/* metrics */
.metrics-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.metric-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:26px 22px;box-shadow:var(--shadow-sm);min-width:0;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.metric-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(22,82,200,.28)}
.metric-num{
  display:block;font-size:30px;font-weight:800;color:var(--brand);
  letter-spacing:.5px;line-height:1.2;margin-bottom:10px;
}
.metric-card h3{font-size:15.5px;font-weight:700;color:var(--brand-deep);margin-bottom:8px}
.metric-card p{font-size:14px;color:var(--muted);line-height:1.8}

/* plan grid */
.plan-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.plan-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-sm);min-width:0;
  transition:transform .22s ease,box-shadow .22s ease;
  border-top:3px solid transparent;
}
.plan-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-top-color:var(--brand)}
.plan-card span{display:inline-block;font-size:12.5px;color:var(--brand);font-weight:700;letter-spacing:1px;margin-bottom:10px}
.plan-card h3{font-size:17px;font-weight:700;color:var(--brand-deep);margin-bottom:10px}
.plan-card p{font-size:14.5px;color:var(--muted);line-height:1.85}

/* scenes */
.scene-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.scene-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:24px 22px;box-shadow:var(--shadow-sm);min-width:0;
  transition:transform .22s ease,box-shadow .22s ease;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.scene-card h3{font-size:16px;font-weight:700;color:var(--brand-deep);margin-bottom:9px;display:flex;align-items:center;gap:9px}
.scene-card h3::before{content:"";width:8px;height:8px;border-radius:3px;background:var(--accent);flex:0 0 auto}
.scene-card p{font-size:14px;color:var(--muted);line-height:1.8}

/* steps */
.steps-layout{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:52px;align-items:center}
.steps-copy h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;color:var(--brand-deep);line-height:1.4;margin-bottom:14px}
.steps-copy > p{color:var(--muted);font-size:15.5px;line-height:1.85;margin-bottom:26px}
.step-list li{display:flex;gap:18px;padding:18px 0;border-bottom:1px solid var(--border);min-width:0}
.step-list li:last-child{border-bottom:0}
.step-index{
  flex:0 0 auto;width:44px;height:44px;border-radius:12px;
  background:var(--brand-soft);color:var(--brand);font-weight:800;font-size:15px;
  display:grid;place-items:center;
}
.step-list h3{font-size:16px;font-weight:700;color:var(--brand-deep);margin-bottom:6px}
.step-list p{font-size:14.5px;color:var(--muted);line-height:1.8}
.steps-panel{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);padding:26px;min-width:0;
}
.steps-panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:20px}
.steps-panel-head h3{font-size:15.5px;font-weight:700;color:var(--brand-deep)}
.steps-panel-head .dot{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--muted)}
.steps-panel-head .dot::before{content:"";width:8px;height:8px;border-radius:50%;background:#2ecc8f}
.gauge{margin-bottom:18px}
.gauge:last-of-type{margin-bottom:0}
.gauge-top{display:flex;justify-content:space-between;font-size:13.5px;color:var(--muted);margin-bottom:8px}
.gauge-top strong{color:var(--brand-deep);font-weight:600}
.gauge-bar{height:9px;border-radius:999px;background:#eef2fa;overflow:hidden}
.gauge-bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#1f6be0,#1652c8)}
.gauge-bar i.warn{background:linear-gradient(90deg,#f2a83b,#e88b1f)}
.gauge-bar i.safe{background:linear-gradient(90deg,#3ecf9a,#22a97a)}
.panel-note{margin-top:18px;font-size:12.5px;color:#8a97ab;line-height:1.7;border-top:1px dashed var(--border);padding-top:14px}

/* compare */
.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.compare-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:30px 28px;box-shadow:var(--shadow-sm);min-width:0;
}
.compare-card h3{font-size:18px;font-weight:700;color:var(--brand-deep);margin-bottom:6px}
.compare-card .compare-sub{font-size:13.5px;color:var(--muted);margin-bottom:18px}
.compare-card ul li{
  display:flex;gap:10px;font-size:14.5px;color:#43536e;line-height:1.8;
  padding:10px 0;border-bottom:1px dashed var(--border);
}
.compare-card ul li:last-child{border-bottom:0}
.compare-card ul li::before{content:"";flex:0 0 auto;width:7px;height:7px;border-radius:50%;background:#a9b7cf;margin-top:11px}
.compare-card.is-accent{background:linear-gradient(160deg,#0d2c66,#1652c8);border-color:transparent;color:#fff;box-shadow:var(--shadow-lg)}
.compare-card.is-accent h3{color:#fff}
.compare-card.is-accent .compare-sub{color:rgba(255,255,255,.78)}
.compare-card.is-accent ul li{color:rgba(255,255,255,.92);border-bottom-color:rgba(255,255,255,.18)}
.compare-card.is-accent ul li::before{background:var(--accent)}

/* timeline */
.timeline{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:16px;position:relative}
.timeline-item{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:20px 18px;box-shadow:var(--shadow-sm);min-width:0;position:relative;
  transition:transform .22s ease,box-shadow .22s ease;
}
.timeline-item:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.timeline-item span{display:block;font-size:12.5px;font-weight:700;color:var(--brand);letter-spacing:1px;margin-bottom:8px}
.timeline-item h3{font-size:15px;font-weight:700;color:var(--brand-deep);margin-bottom:8px;line-height:1.5}
.timeline-item p{font-size:13.5px;color:var(--muted);line-height:1.75}

/* risk */
.risk-layout{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:48px;align-items:start}
.risk-copy h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;color:var(--brand-deep);line-height:1.4;margin-bottom:14px}
.risk-copy p{color:var(--muted);font-size:15.5px;line-height:1.85}
.risk-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.risk-item{
  background:#fff;border:1px solid var(--border);border-left:4px solid var(--brand);
  border-radius:var(--radius);padding:22px 20px;box-shadow:var(--shadow-sm);min-width:0;
}
.risk-item h3{font-size:15.5px;font-weight:700;color:var(--brand-deep);margin-bottom:8px}
.risk-item p{font-size:14px;color:var(--muted);line-height:1.8}

/* category entry */
.entry-card{
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:32px;align-items:center;
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:36px;box-shadow:var(--shadow);min-width:0;
}
.entry-card h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;color:var(--brand-deep);margin-bottom:12px;line-height:1.45}
.entry-card p{font-size:15px;color:var(--muted);line-height:1.85;max-width:640px}
.entry-card .btn{flex:0 0 auto}

/* guarantee */
.guard-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.guard-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:26px 22px;box-shadow:var(--shadow-sm);min-width:0;
}
.guard-icon{
  width:44px;height:44px;border-radius:12px;background:var(--brand-soft);
  display:grid;place-items:center;margin-bottom:14px;
}
.guard-icon svg{width:22px;height:22px;stroke:var(--brand);fill:none;stroke-width:1.9}
.guard-card h3{font-size:16px;font-weight:700;color:var(--brand-deep);margin-bottom:8px}
.guard-card p{font-size:14px;color:var(--muted);line-height:1.8}

/* news */
.news-layout{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,.75fr);gap:32px;align-items:start}
.news-list{display:grid;gap:14px}
.news-item{
  display:flex;align-items:flex-start;justify-content:space-between;gap:22px;min-width:0;
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:22px 24px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:rgba(22,82,200,.3)}
.news-item-main{min-width:0}
.news-item-main h3{font-size:16px;font-weight:700;color:var(--brand-deep);line-height:1.6;margin-bottom:6px}
.news-item-main p{font-size:14px;color:var(--muted);line-height:1.75;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.news-item-meta{display:flex;flex-direction:column;align-items:flex-end;gap:8px;flex:0 0 auto}
.news-item-meta time{font-size:12.5px;color:#8a97ab;white-space:nowrap}
.news-side{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:26px;box-shadow:var(--shadow-sm);
}
.news-side h3{font-size:16px;font-weight:700;color:var(--brand-deep);margin-bottom:14px}
.news-side ul li{font-size:14px;color:var(--muted);line-height:1.8;padding:10px 0;border-bottom:1px dashed var(--border)}
.news-side ul li:last-child{border-bottom:0}
.news-side .side-note{margin-top:16px;font-size:12.5px;color:#8a97ab;line-height:1.7}
.empty-note{
  background:#fff;border:1px dashed var(--border);border-radius:var(--radius);
  padding:34px;text-align:center;color:var(--muted);font-size:15px;
}

/* glossary */
.glossary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.glossary-item{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:20px 22px;min-width:0;box-shadow:var(--shadow-sm);
}
.glossary-item dt{font-size:15px;font-weight:700;color:var(--brand-deep);margin-bottom:6px}
.glossary-item dd{margin:0;font-size:14px;color:var(--muted);line-height:1.8}

/* faq */
.faq-list{display:grid;gap:14px;max-width:900px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:0 24px;box-shadow:var(--shadow-sm);transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:rgba(22,82,200,.28)}
.faq-item[open]{box-shadow:var(--shadow);border-color:rgba(22,82,200,.3)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 0;font-size:16px;font-weight:600;color:var(--brand-deep);line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";flex:0 0 auto;width:26px;height:26px;border-radius:8px;
  background:var(--brand-soft);color:var(--brand);font-size:17px;font-weight:700;
  display:grid;place-items:center;transition:.2s;
}
.faq-item[open] summary::after{content:"−";background:var(--brand);color:#fff}
.faq-item p{font-size:14.5px;color:var(--muted);line-height:1.9;padding:0 0 22px;border-top:1px dashed var(--border);padding-top:16px}

/* cta */
.cta-band{
  background:linear-gradient(135deg,#0d2c66,#1652c8 62%,#1f6be0);
  border-radius:26px;padding:52px 48px;color:#fff;box-shadow:var(--shadow-lg);
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:34px;align-items:center;
}
.cta-band h2{font-size:clamp(21px,2.3vw,28px);font-weight:700;line-height:1.45;margin-bottom:12px}
.cta-band p{font-size:15px;color:rgba(255,255,255,.86);line-height:1.85;max-width:720px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* footer */
.site-footer{background:#0a1c3a;color:#c3cfdf;padding:60px 0 0;margin-top:80px}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,.72fr));gap:36px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-mark{width:40px;height:40px;font-size:17px;box-shadow:none}
.footer-brand strong{font-size:17px;color:#fff;letter-spacing:.3px}
.footer-about{font-size:14px;line-height:1.85;color:#93a4bd;max-width:340px}
.footer-col h3{font-size:15px;color:#fff;font-weight:600;margin-bottom:16px;letter-spacing:.4px}
.footer-col ul li{margin-bottom:10px}
.footer-col a{font-size:14px;color:#a9b8cd;transition:color .2s ease}
.footer-col a:hover{color:#fff}
.footer-col p{font-size:13.5px;color:#93a4bd;line-height:1.85}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0 26px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:#7e8ea6;
}
.footer-risk{font-size:12.5px;color:#7e8ea6;line-height:1.8;max-width:900px;margin-top:6px}

/* responsive */
@media (max-width:1080px){
  .hero-inner{gap:38px}
  .metrics-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .plan-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .guard-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .timeline{grid-template-columns:repeat(3,minmax(0,1fr))}
  .download-shell{grid-template-columns:minmax(0,1fr);gap:28px;padding:38px}
  .steps-layout{gap:34px}
  .risk-layout{gap:32px}
  .news-layout{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  .hero-inner{grid-template-columns:minmax(0,1fr)}
  .hero{padding:48px 0 58px}
  .steps-layout{grid-template-columns:minmax(0,1fr)}
  .risk-layout{grid-template-columns:minmax(0,1fr)}
  .compare-grid{grid-template-columns:minmax(0,1fr)}
  .entry-card{grid-template-columns:minmax(0,1fr);gap:22px;padding:30px 26px}
  .cta-band{grid-template-columns:minmax(0,1fr);padding:38px 30px}
}
@media (max-width:860px){
  .site-nav{
    position:absolute;top:74px;left:0;right:0;display:none;
    flex-direction:column;align-items:stretch;gap:6px;
    background:#fff;border-bottom:1px solid var(--border);
    padding:14px 20px 20px;box-shadow:var(--shadow);
  }
  .site-nav.is-open{display:flex}
  .nav-link{text-align:left;padding:12px 16px;border-radius:12px}
  .nav-toggle{display:flex}
  .header-actions .btn-sm{display:none}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .metrics-grid,.plan-grid,.scene-grid,.guard-grid,.glossary,.risk-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .timeline{grid-template-columns:repeat(2,minmax(0,1fr))}
  .download-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
}
@media (max-width:600px){
  .site-container{padding:0 18px}
  .brand-text strong{font-size:15.5px}
  .brand-text em{font-size:11px;letter-spacing:1px}
  .hero-actions .btn{flex:1 1 auto}
  .metrics-grid,.plan-grid,.scene-grid,.guard-grid,.glossary,.risk-list,.timeline{grid-template-columns:minmax(0,1fr)}
  .download-grid{grid-template-columns:minmax(0,1fr)}
  .panel-dl{grid-template-columns:minmax(0,1fr)}
  .news-item{flex-direction:column;gap:12px}
  .news-item-meta{flex-direction:row;align-items:center;gap:12px}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .cta-actions .btn{width:100%}
  .download-shell{padding:28px 22px;border-radius:20px}
  .cta-band{padding:32px 22px;border-radius:20px}
  .site-footer{margin-top:56px}
}

/* roulang page: article */
:root{
  --brand:#1652c8;
  --brand-deep:#0d2c66;
  --brand-soft:#eaf1ff;
  --accent:#f2a83b;
  --bg:#f5f8fd;
  --surface:#ffffff;
  --text:#16233a;
  --muted:#5b6b85;
  --border:#e3e9f4;
  --radius-lg:22px;
  --radius:14px;
  --radius-sm:10px;
  --shadow-sm:0 4px 14px rgba(15,42,88,.06);
  --shadow:0 14px 36px rgba(15,42,88,.09);
  --shadow-lg:0 24px 60px rgba(13,44,102,.2);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.42;color:var(--brand-deep)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease}
img{max-width:100%;height:auto;display:block}
button{font-family:inherit}
.site-container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
.section{padding:64px 0}
.section-alt{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section-head{max-width:780px;margin-bottom:30px}
.section-head h2{font-size:clamp(21px,2.3vw,28px);margin-bottom:10px;letter-spacing:.2px}
.section-head p{color:var(--muted);font-size:15.5px;line-height:1.85}
.tag{
  display:inline-block;background:var(--brand-soft);color:var(--brand);
  border-radius:999px;padding:3px 12px;font-size:12.5px;font-weight:600;white-space:nowrap;
}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand-soft);color:var(--brand);
  border:1px solid rgba(22,82,200,.16);
  border-radius:999px;padding:6px 16px;font-size:13px;font-weight:600;letter-spacing:.4px;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;line-height:1.3;text-align:center;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn:focus-visible{outline:3px solid rgba(22,82,200,.35);outline-offset:3px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(22,82,200,.26)}
.btn-primary:hover{background:#1044a9;transform:translateY(-2px);box-shadow:0 16px 32px rgba(22,82,200,.32)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 16px rgba(22,82,200,.28)}
.btn-ghost{background:#fff;color:var(--brand-deep);border-color:rgba(13,44,102,.18);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-sm{padding:10px 20px;font-size:14px}
.btn-block{width:100%}
/* header */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(255,255,255,.97);
  border-bottom:1px solid var(--border);
  box-shadow:0 2px 12px rgba(15,42,88,.04);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:74px;position:relative}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  width:44px;height:44px;flex:0 0 auto;border-radius:13px;
  background:linear-gradient(140deg,#1f6be0,#0d2c66);
  color:#fff;display:grid;place-items:center;font-size:19px;font-weight:700;
  box-shadow:0 8px 18px rgba(22,82,200,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:17px;color:var(--brand-deep);letter-spacing:.3px;white-space:nowrap}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:1.4px}
.site-nav{display:flex;align-items:center;gap:6px}
.nav-link{
  padding:9px 16px;border-radius:999px;font-size:15px;color:#3b4a63;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease;white-space:nowrap;
}
.nav-link:hover{background:var(--brand-soft);color:var(--brand)}
.nav-link:focus-visible{outline:3px solid rgba(22,82,200,.3);outline-offset:2px}
.nav-link.is-active{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(22,82,200,.24)}
.header-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:4.5px;
  width:42px;height:42px;border-radius:12px;border:1px solid var(--border);
  background:#fff;cursor:pointer;padding:0 11px;
}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--brand-deep);transition:.2s}
.nav-toggle:hover{background:var(--brand-soft)}
.nav-toggle:focus-visible{outline:3px solid rgba(22,82,200,.3);outline-offset:2px}
/* article hero */
.article-hero{
  position:relative;overflow:hidden;
  padding:46px 0 52px;
  background:linear-gradient(180deg,#eef4ff 0%,#f8fbff 62%,var(--bg) 100%);
  border-bottom:1px solid var(--border);
}
.article-hero::before{
  content:"";position:absolute;width:520px;height:520px;right:-200px;top:-260px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,82,200,.14),rgba(22,82,200,0) 68%);
  pointer-events:none;
}
.article-hero-inner{position:relative;max-width:900px}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:16px}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#b9c6dd}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:14px;font-size:13.5px;color:var(--muted)}
.article-title{
  font-size:clamp(24px,3vw,36px);
  line-height:1.4;
  letter-spacing:.2px;
  color:var(--brand-deep);
  overflow-wrap:break-word;
  word-break:normal;
}
.article-subnote{margin-top:16px;font-size:14.5px;color:#4a5b78;line-height:1.85;max-width:760px}
/* layout */
.article-section{padding:52px 0 68px}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 320px;
  gap:36px;
  align-items:start;
}
.article-main{min-width:0}
.article-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);
  padding:34px 36px;
}
.article-body{max-width:720px;font-size:16px;line-height:1.95;color:#243349;overflow-wrap:break-word}
.article-body > *:last-child{margin-bottom:0}
.article-body h2{
  font-size:21px;line-height:1.5;margin:32px 0 14px;padding-left:14px;
  border-left:4px solid var(--brand);color:var(--brand-deep);
}
.article-body h3{font-size:17.5px;line-height:1.55;margin:24px 0 10px;color:var(--brand-deep)}
.article-body h4{font-size:16px;margin:20px 0 8px;color:var(--brand-deep)}
.article-body p{margin:0 0 18px;color:#2a3a52}
.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;color:#2a3a52}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:#0d2c66}
.article-body strong{color:var(--brand-deep)}
.article-body blockquote{
  margin:0 0 20px;padding:14px 18px;background:var(--brand-soft);
  border-left:4px solid var(--brand);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:#33415c;font-size:15.5px;
}
.article-body img{border-radius:var(--radius);margin:0 0 20px;height:auto}
.article-body table{width:100%;border-collapse:collapse;margin:0 0 20px;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--border);padding:10px 12px;text-align:left;vertical-align:top}
.article-body th{background:var(--brand-soft);color:var(--brand-deep);font-weight:600}
.article-end{
  margin-top:30px;padding-top:22px;border-top:1px dashed var(--border);
  font-size:13.5px;color:var(--muted);line-height:1.85;
}
.article-empty{
  max-width:640px;padding:26px;border:1px dashed var(--border);border-radius:var(--radius);
  background:#fbfdff;text-align:left;
}
.article-empty h2{font-size:20px;margin-bottom:10px}
.article-empty p{color:var(--muted);font-size:15px;margin-bottom:18px}
/* sidebar */
.article-side{display:grid;gap:18px;position:sticky;top:94px;min-width:0}
.side-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);padding:22px;
}
.side-card h2,.side-card h3{font-size:16px;margin-bottom:14px;letter-spacing:.3px}
.side-card p{font-size:13.8px;color:var(--muted);line-height:1.85}
.side-dl{display:grid;gap:10px;margin-top:16px}
.side-dl .btn{width:100%}
.side-list{display:grid;gap:11px;margin-top:2px}
.side-list li{display:flex;gap:9px;font-size:13.8px;color:#3c4c66;line-height:1.7}
.side-list li::before{
  content:"";flex:0 0 auto;width:7px;height:7px;border-radius:50%;
  background:var(--brand);margin-top:8px;
}
.side-risk{background:#fff8ec;border-color:#f6e1bd}
.side-risk h3{color:#8a5a11}
.side-risk p{color:#7b5a24}
/* feature grid */
.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.feature-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow-sm);min-width:0;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cfdcf3}
.feature-card h3{font-size:16px;margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--muted);line-height:1.85}
.feature-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:11px;background:var(--brand-soft);
  color:var(--brand);font-size:14px;font-weight:700;margin-bottom:14px;
}
/* download */
.download-section{
  background:linear-gradient(135deg,#0d2c66 0%,#1652c8 100%);
  color:#fff;padding:60px 0;
}
.download-inner{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,420px);gap:40px;align-items:center}
.download-copy h2{color:#fff;font-size:clamp(21px,2.3vw,28px);margin-bottom:12px}
.download-copy p{color:rgba(255,255,255,.82);font-size:15px;line-height:1.9;max-width:520px}
.download-actions{display:grid;gap:12px}
.dl-link{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.28);
  border-radius:var(--radius);padding:14px 20px;color:#fff;
  transition:background .2s ease,transform .2s ease,border-color .2s ease;
}
.dl-link:hover{background:rgba(255,255,255,.2);border-color:#fff;transform:translateY(-2px)}
.dl-link:focus-visible{outline:3px solid rgba(255,255,255,.6);outline-offset:3px}
.dl-link strong{font-size:15.5px;font-weight:600;display:block}
.dl-link span{font-size:12.5px;color:rgba(255,255,255,.72);display:block;margin-top:2px}
.dl-link em{font-style:normal;font-size:13px;color:#ffd894;white-space:nowrap}
/* faq */
.faq-list{display:grid;gap:16px;max-width:900px}
.faq-item{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px 24px;box-shadow:var(--shadow-sm);min-width:0;
}
.faq-item h3{font-size:16px;margin-bottom:9px;color:var(--brand-deep)}
.faq-item p{font-size:14.5px;color:var(--muted);line-height:1.9}
/* related */
.related-box{
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:26px;align-items:center;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:30px 34px;box-shadow:var(--shadow-sm);
}
.related-box h2{font-size:20px;margin-bottom:8px}
.related-box p{font-size:14.5px;color:var(--muted);line-height:1.85;max-width:660px}
.related-actions{display:flex;flex-wrap:wrap;gap:12px}
/* closing */
.closing{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:34px;box-shadow:var(--shadow-sm);text-align:center;
}
.closing h2{font-size:clamp(19px,2.1vw,24px);margin-bottom:10px}
.closing p{color:var(--muted);font-size:14.5px;line-height:1.9;max-width:720px;margin:0 auto 22px}
.closing-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
/* footer */
.site-footer{background:var(--brand-deep);color:#c8d6ef;padding:56px 0 28px}
.footer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:32px}
.footer-col{min-width:0}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:14px;letter-spacing:.4px}
.footer-col ul{display:grid;gap:9px}
.footer-col ul a{color:#c8d6ef;font-size:14px;line-height:1.7}
.footer-col ul a:hover{color:#fff}
.footer-col p{font-size:13.5px;line-height:1.9;color:#a9bcdd}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:14px;color:#fff;font-size:16px;font-weight:700}
.footer-brand .brand-mark{width:38px;height:38px;font-size:16px;border-radius:11px;box-shadow:none;background:linear-gradient(140deg,#2a76ea,#1652c8)}
.footer-about{font-size:13.5px;line-height:1.9;color:#a9bcdd}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  border-top:1px solid rgba(255,255,255,.14);margin-top:34px;padding-top:18px;
  font-size:13px;color:#9fb3d6;
}
.footer-risk{margin-top:14px;font-size:12.5px;color:#8ea4c8;line-height:1.85}
@media (max-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:28px}
  .article-side{position:static;grid-template-columns:repeat(2,minmax(0,1fr));display:grid}
  .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .download-inner{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .related-box{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:900px){
  .site-nav{
    position:absolute;top:74px;left:0;right:0;display:none;
    flex-direction:column;align-items:stretch;gap:4px;
    background:#fff;border-bottom:1px solid var(--border);
    box-shadow:var(--shadow);padding:12px 20px 18px;
  }
  .site-nav.is-open{display:flex}
  .nav-link{padding:12px 14px;border-radius:10px;font-size:15px}
  .nav-toggle{display:flex}
  .header-actions .btn-sm{display:none}
}
@media (max-width:768px){
  .site-container{padding:0 18px}
  .section{padding:48px 0}
  .article-section{padding:38px 0 52px}
  .article-card{padding:24px 20px;border-radius:var(--radius)}
  .article-body{font-size:15.5px;line-height:1.9}
  .article-side{grid-template-columns:minmax(0,1fr)}
  .article-hero{padding:32px 0 38px}
  .brand-text strong{font-size:15.5px}
  .brand-text em{font-size:11px;letter-spacing:1px}
  .download-section{padding:46px 0}
  .related-box{padding:24px 20px}
  .closing{padding:26px 20px}
}
@media (max-width:520px){
  .feature-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .article-body h2{font-size:19px}
  .btn{padding:12px 20px;font-size:14.5px}
  .dl-link{padding:12px 16px}
  .dl-link em{display:none}
  .closing-actions .btn,.related-actions .btn{width:100%}
}

/* roulang page: category1 */
:root{
  --brand:#1652c8;
  --brand-deep:#0d2c66;
  --brand-soft:#eaf1ff;
  --accent:#f2a83b;
  --bg:#f5f8fd;
  --surface:#ffffff;
  --text:#16233a;
  --muted:#5b6b85;
  --border:#e3e9f4;
  --radius-lg:22px;
  --radius:14px;
  --radius-sm:10px;
  --shadow-sm:0 4px 14px rgba(15,42,88,.06);
  --shadow:0 14px 36px rgba(15,42,88,.09);
  --shadow-lg:0 24px 60px rgba(13,44,102,.2);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0;padding:0}
ul,ol{list-style:none}
.site-container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section-alt{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section-head{max-width:820px;margin-bottom:34px}
.section-head h2{
  font-size:clamp(22px,2.4vw,30px);
  line-height:1.4;
  font-weight:700;
  color:var(--brand-deep);
  margin-bottom:12px;
  letter-spacing:.2px;
}
.section-head p{color:var(--muted);font-size:15.5px;line-height:1.85}
.section-head.is-center{margin-left:auto;margin-right:auto;text-align:center}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand-soft);color:var(--brand);
  border:1px solid rgba(22,82,200,.16);
  border-radius:999px;padding:6px 16px;font-size:13px;font-weight:600;letter-spacing:.4px;
}
.tag{
  display:inline-block;background:var(--brand-soft);color:var(--brand);
  border-radius:999px;padding:3px 12px;font-size:12.5px;font-weight:600;white-space:nowrap;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  text-align:center;line-height:1.3;
}
.btn:focus-visible{outline:3px solid rgba(22,82,200,.35);outline-offset:3px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(22,82,200,.26)}
.btn-primary:hover{background:#1044a9;transform:translateY(-2px);box-shadow:0 16px 32px rgba(22,82,200,.32)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--brand-deep);border-color:rgba(13,44,102,.18);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-sm{padding:10px 20px;font-size:14px}
.btn-light{background:#fff;color:var(--brand-deep)}
.btn-light:hover{background:#eef4ff;transform:translateY(-2px)}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-outline-light:hover{background:rgba(255,255,255,.14);border-color:#fff;transform:translateY(-2px)}
/* header */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(255,255,255,.97);
  border-bottom:1px solid var(--border);
  box-shadow:0 2px 12px rgba(15,42,88,.04);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:74px;position:relative}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  width:44px;height:44px;flex:0 0 auto;border-radius:13px;
  background:linear-gradient(140deg,#1f6be0,#0d2c66);
  color:#fff;display:grid;place-items:center;font-size:19px;font-weight:700;
  box-shadow:0 8px 18px rgba(22,82,200,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:17px;color:var(--brand-deep);letter-spacing:.3px;white-space:nowrap}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:1.4px}
.site-nav{display:flex;align-items:center;gap:6px}
.nav-link{
  padding:9px 16px;border-radius:999px;font-size:15px;color:#3b4a63;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease;white-space:nowrap;
}
.nav-link:hover{background:var(--brand-soft);color:var(--brand)}
.nav-link:focus-visible{outline:3px solid rgba(22,82,200,.3);outline-offset:2px}
.nav-link.is-active{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(22,82,200,.24)}
.header-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:4.5px;
  width:42px;height:42px;border-radius:12px;border:1px solid var(--border);
  background:#fff;cursor:pointer;padding:0 11px;
}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--brand-deep);transition:.2s}
.nav-toggle:hover{background:var(--brand-soft)}
/* category hero */
.cat-hero{
  position:relative;overflow:hidden;padding:58px 0 64px;
  background:linear-gradient(180deg,#eef4ff 0%,#f7faff 60%,var(--bg) 100%);
}
.cat-hero::before{
  content:"";position:absolute;width:520px;height:520px;right:-170px;top:-220px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,82,200,.15),rgba(22,82,200,0) 66%);
}
.cat-hero-inner{
  position:relative;display:grid;
  grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);
  gap:46px;align-items:start;
}
.crumb{font-size:13px;color:var(--muted);margin-bottom:16px}
.crumb a:hover{color:var(--brand)}
.crumb span{margin:0 6px;color:#a8b6cc}
.cat-hero h1{
  font-size:clamp(26px,3vw,38px);
  line-height:1.34;
  font-weight:800;
  color:var(--brand-deep);
  margin:16px 0 18px;
  letter-spacing:.2px;
}
.cat-lead{color:#43536e;font-size:16px;line-height:1.9;margin-bottom:24px}
.cat-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:22px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px}
.hero-tags li{
  font-size:13.5px;color:var(--brand-deep);background:#fff;
  border:1px solid var(--border);border-radius:999px;padding:6px 15px;box-shadow:var(--shadow-sm);
}
.spec-panel{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:26px;box-shadow:var(--shadow);min-width:0;
}
.spec-panel h2{font-size:16px;font-weight:700;color:var(--brand-deep);margin-bottom:6px;letter-spacing:.3px}
.spec-panel .panel-note{font-size:13px;color:var(--muted);margin-bottom:12px}
.spec-row{
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:11px 0;border-bottom:1px dashed var(--border);font-size:14.5px;
}
.spec-row:last-of-type{border-bottom:0;padding-bottom:0}
.spec-row span{color:var(--muted);flex:1 1 auto;min-width:0}
.spec-row strong{color:var(--brand-deep);font-weight:600;flex:0 0 auto;max-width:56%;text-align:right}
/* metric strip */
.metric-strip{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:34px;
}
.metric-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:20px 18px;box-shadow:var(--shadow-sm);min-width:0;
  transition:transform .2s ease,box-shadow .2s ease;
}
.metric-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.metric-card i{color:var(--brand);font-size:17px;margin-bottom:10px;display:block}
.metric-card strong{display:block;font-size:15.5px;color:var(--brand-deep);margin-bottom:6px}
.metric-card p{font-size:13.5px;color:var(--muted);line-height:1.75}
/* element cards */
.element-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.element-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-sm);min-width:0;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.element-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(22,82,200,.28)}
.element-card .num{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;background:var(--brand-soft);
  color:var(--brand);font-weight:700;font-size:14px;margin-bottom:14px;
}
.element-card h3{font-size:17px;color:var(--brand-deep);margin-bottom:10px;font-weight:700;line-height:1.5}
.element-card p{font-size:14.5px;color:#4b5b74;line-height:1.85}
/* matrix table */
.matrix-wrap{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);overflow-x:auto;padding:6px 0;
}
.matrix-table{width:100%;min-width:700px;border-collapse:collapse;font-size:14.5px}
.matrix-table thead th{
  background:#f2f6fd;color:var(--brand-deep);font-weight:700;text-align:left;
  padding:15px 20px;border-bottom:1px solid var(--border);white-space:nowrap;
}
.matrix-table tbody td{padding:15px 20px;border-bottom:1px solid var(--border);color:#41526d;vertical-align:top;line-height:1.8}
.matrix-table tbody tr:last-child td{border-bottom:0}
.matrix-table tbody tr:hover td{background:#fafcff}
.matrix-table td:first-child{color:var(--brand-deep);font-weight:600;white-space:nowrap}
/* scenario */
.scene-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.scene-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow-sm);min-width:0;border-left:4px solid var(--brand);
}
.scene-card h3{font-size:17.5px;color:var(--brand-deep);margin-bottom:10px}
.scene-card p{font-size:14.5px;color:#4b5b74;line-height:1.85;margin-bottom:14px}
.scene-card ul li{
  position:relative;padding-left:20px;font-size:14px;color:var(--muted);line-height:1.9;
}
.scene-card ul li::before{
  content:"";position:absolute;left:4px;top:.78em;width:6px;height:6px;border-radius:50%;background:var(--accent);
}
/* flow */
.flow-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.flow-item{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:24px 22px;box-shadow:var(--shadow-sm);position:relative;min-width:0;
}
.flow-item .step{
  font-size:13px;font-weight:700;color:var(--brand);letter-spacing:1px;margin-bottom:10px;display:block;
}
.flow-item h3{font-size:16px;color:var(--brand-deep);margin-bottom:8px}
.flow-item p{font-size:14px;color:var(--muted);line-height:1.8}
/* risk band */
.risk-band{
  background:linear-gradient(135deg,#0d2c66 0%,#1652c8 100%);
  border-radius:var(--radius-lg);padding:40px;color:#fff;box-shadow:var(--shadow-lg);
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:34px;align-items:start;
}
.risk-band h2{font-size:clamp(20px,2.2vw,26px);color:#fff;margin-bottom:14px;line-height:1.45}
.risk-band p{color:rgba(255,255,255,.86);font-size:15px;line-height:1.9}
.risk-list li{
  display:flex;gap:12px;align-items:flex-start;font-size:14.5px;line-height:1.85;
  color:rgba(255,255,255,.92);padding:10px 0;border-bottom:1px dashed rgba(255,255,255,.22);
}
.risk-list li:last-child{border-bottom:0}
.risk-list i{color:var(--accent);margin-top:5px;font-size:13px}
/* download */
.download-band{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:34px;box-shadow:var(--shadow);
}
.download-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px}
.download-head h2{font-size:clamp(20px,2.2vw,26px);color:var(--brand-deep);margin-bottom:8px}
.download-head p{color:var(--muted);font-size:14.5px;line-height:1.8;max-width:600px}
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.dl-card{
  border:1px solid var(--border);border-radius:var(--radius);padding:22px 20px;
  background:#fafcff;min-width:0;display:flex;flex-direction:column;gap:12px;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.dl-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:rgba(22,82,200,.3);background:#fff}
.dl-card i{font-size:22px;color:var(--brand)}
.dl-card strong{font-size:16px;color:var(--brand-deep)}
.dl-card span{font-size:13.5px;color:var(--muted);line-height:1.75}
.dl-card .btn{margin-top:auto;width:100%}
.dl-note{margin-top:16px;font-size:13px;color:var(--muted);line-height:1.8}
/* posts */
.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.post-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);min-width:0;transition:transform .2s ease,box-shadow .2s ease;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.post-card .post-link{display:flex;flex-direction:column;gap:10px;padding:24px 22px;height:100%}
.post-card h3{font-size:16.5px;line-height:1.6;color:var(--brand-deep);font-weight:700}
.post-card p{font-size:14px;color:var(--muted);line-height:1.8}
.post-date{font-size:12.5px;color:#8a99b0;margin-top:auto}
.empty-tip{
  grid-column:1/-1;text-align:center;color:var(--muted);font-size:14.5px;
  background:#fff;border:1px dashed var(--border);border-radius:var(--radius);padding:32px;
}
/* faq */
.faq-list{display:grid;gap:14px;max-width:900px}
.faq-item{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);overflow:hidden;
}
.faq-item summary{
  cursor:pointer;list-style:none;padding:20px 24px;font-size:16px;font-weight:600;
  color:var(--brand-deep);display:flex;align-items:center;justify-content:space-between;gap:16px;
  transition:background .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:#f7faff}
.faq-item summary:focus-visible{outline:3px solid rgba(22,82,200,.3);outline-offset:-3px}
.faq-item summary::after{
  content:"\002B";color:var(--brand);font-size:20px;font-weight:400;line-height:1;flex:0 0 auto;
}
.faq-item[open] summary::after{content:"\2212"}
.faq-item .faq-body{padding:0 24px 22px;font-size:14.8px;color:#4b5b74;line-height:1.9}
/* cta */
.cta-band{
  background:var(--brand-soft);border:1px solid rgba(22,82,200,.16);
  border-radius:var(--radius-lg);padding:38px;display:flex;flex-wrap:wrap;
  align-items:center;justify-content:space-between;gap:24px;
}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);color:var(--brand-deep);margin-bottom:8px}
.cta-band p{font-size:14.8px;color:#42536f;line-height:1.85;max-width:660px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
/* footer */
.site-footer{background:#0d2c66;color:#c8d6ee;padding:56px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-mark{width:38px;height:38px;font-size:16px;border-radius:11px}
.footer-brand strong{color:#fff;font-size:16px;letter-spacing:.3px}
.footer-about{font-size:13.8px;line-height:1.9;color:#c8d6ee}
.footer-col h3{color:#fff;font-size:15px;margin-bottom:14px;font-weight:600}
.footer-col ul{display:grid;gap:10px}
.footer-col ul a{font-size:13.8px;color:#c8d6ee;transition:color .2s ease}
.footer-col ul a:hover{color:#fff}
.footer-col p{font-size:13.8px;line-height:1.9;color:#c8d6ee}
.footer-bottom{
  margin-top:34px;padding-top:20px;border-top:1px solid rgba(255,255,255,.16);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13px;color:#9fb4d6;
}
.footer-risk{font-size:12.5px;color:#8ea5c9;line-height:1.8;margin-top:14px}
/* responsive */
@media screen and (max-width:1024px){
  .cat-hero-inner{grid-template-columns:1fr;gap:32px}
  .metric-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .element-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .flow-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .risk-band{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-nav{
    position:absolute;top:66px;left:0;right:0;flex-direction:column;align-items:stretch;
    background:#fff;border:1px solid var(--border);border-radius:var(--radius);
    box-shadow:var(--shadow);padding:12px;gap:4px;display:none;
  }
  .site-nav.is-open{display:flex}
  .nav-toggle{display:flex}
  .header-actions .btn-sm{display:none}
}
@media screen and (max-width:768px){
  .section{padding:54px 0}
  .cat-hero{padding:40px 0 48px}
  .scene-grid{grid-template-columns:1fr}
  .dl-grid{grid-template-columns:1fr}
  .download-band,.risk-band,.cta-band{padding:26px 20px}
  .header-inner{height:66px}
  .brand-text strong{font-size:15px}
  .brand-text em{font-size:11px;letter-spacing:1px}
}
@media screen and (max-width:520px){
  .site-container{padding:0 16px}
  .metric-strip{grid-template-columns:1fr}
  .element-grid{grid-template-columns:1fr}
  .flow-grid{grid-template-columns:1fr}
  .post-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cat-actions .btn{width:100%}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .brand-text strong{font-size:14.5px;white-space:normal}
}