/* roulang page: index */
:root{
  --brand-800:#0C3F63;
  --brand-700:#0F4E7A;
  --brand-600:#14679F;
  --brand-500:#2A87C2;
  --brand-100:#DCEBF5;
  --brand-050:#F0F7FC;
  --mint-600:#1F9E86;
  --sand-600:#D97B2B;
  --ink-900:#0B1B2B;
  --ink-700:#29415A;
  --ink-500:#5D7388;
  --ink-300:#9AAEC0;
  --line:#E3EAF2;
  --bg:#F5F8FB;
  --bg-alt:#EDF3F8;
  --surface:#FFFFFF;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-xs:0 1px 2px rgba(11,27,43,.06);
  --shadow-sm:0 4px 12px rgba(11,27,43,.05);
  --shadow-md:0 10px 30px rgba(11,27,43,.07);
  --shadow-lg:0 20px 48px rgba(11,27,43,.10);
  --bs-primary:#14679F;
  --bs-body-color:#29415A;
  --bs-body-bg:#F5F8FB;
  --bs-border-radius:10px;
  --bs-font-sans-serif:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.78;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-800)}
button,input,textarea,select{font-family:inherit;font-size:inherit}
h1,h2,h3,h4,p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.container{max-width:1200px;padding-left:24px;padding-right:24px;margin:0 auto}
@media (min-width:1400px){.container{max-width:1240px}}
@media (max-width:768px){.container{padding-left:18px;padding-right:18px}}
@media (max-width:576px){.container{padding-left:16px;padding-right:16px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease,background .2s ease;
}
.site-header.is-scrolled{
  box-shadow:var(--shadow-sm);
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
}
.nav-wrap{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:28px;height:28px;border-radius:8px;
  background:var(--brand-050);
  border:1px solid var(--brand-100);
  display:grid;place-items:center;flex-shrink:0;
}
.brand-text{font-size:17px;font-weight:700;color:var(--ink-900);letter-spacing:0;white-space:nowrap}
.brand-text span{color:var(--brand-600)}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:12px}
.main-nav a{
  position:relative;
  display:inline-flex;align-items:center;
  height:38px;padding:0 12px;
  font-size:14.5px;font-weight:500;color:var(--ink-700);
  border-radius:8px;
}
.main-nav a:hover{color:var(--brand-600);background:var(--brand-050)}
.main-nav a.active{color:var(--brand-600);font-weight:600}
.main-nav a.active::after{
  content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
  width:18px;height:2px;border-radius:2px;background:var(--brand-600);
}
.nav-tools{display:flex;align-items:center;gap:14px;margin-left:auto}
.cmdk{
  position:relative;display:flex;align-items:center;
  width:240px;height:40px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:0 10px 0 34px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.cmdk:hover{border-color:var(--brand-100)}
.cmdk svg{position:absolute;left:11px;top:50%;transform:translateY(-50%)}
.cmdk input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;
  font-size:13.5px;color:var(--ink-900);height:100%;
}
.cmdk input::placeholder{color:var(--ink-300)}
.cmdk kbd{
  font-family:inherit;font-size:11px;color:var(--ink-500);
  background:var(--bg-alt);border:1px solid var(--line);border-radius:6px;
  padding:1px 6px;white-space:nowrap;
}
.nav-login{font-size:14px;color:var(--ink-700);padding:0 2px}
.nav-login:hover{color:var(--brand-600)}
.nav-toggle{
  margin-left:auto;width:42px;height:42px;border-radius:10px;
  border:1px solid var(--line);background:#fff;
  display:none;place-items:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-900);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* buttons */
.btn-brand,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:500;line-height:1;cursor:pointer;
  border:1px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn-brand{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-xs)}
.btn-brand:hover{background:var(--brand-700);color:#fff}
.btn-brand:active{transform:translateY(1px)}
.btn-ghost{background:#fff;color:var(--ink-900);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-600);background:var(--brand-050)}
.btn-quiet{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:500;color:var(--brand-600);
}
.btn-quiet:hover{color:var(--brand-800);gap:10px}
.btn-sm-nav{height:40px;padding:0 18px;font-size:14px}
@media (max-width:991px){
  .main-nav,.nav-tools{display:none!important}
  .nav-toggle{display:grid}
  .nav-wrap{height:60px}
  .brand-text{font-size:16px}
}
@media (max-width:576px){
  .btn-brand,.btn-ghost{height:44px;padding:0 18px;font-size:14.5px}
}

/* offcanvas */
.offcanvas{width:88%;max-width:360px}
.offcanvas-header{border-bottom:1px solid var(--line);padding:16px 20px}
.offcanvas-body{padding:20px}
.drawer-label{font-size:13px;color:var(--ink-500);margin:6px 0 10px;font-weight:500}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;font-size:16px;color:var(--ink-900);
  border-bottom:1px solid var(--line);
}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--brand-600)}
.drawer-search{
  display:flex;align-items:center;gap:8px;height:44px;
  border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:0 12px;background:#fff;margin-bottom:18px;
}
.drawer-search input{border:0;outline:none;flex:1;font-size:14px;background:transparent}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding:72px 0 84px;
  background:
    radial-gradient(680px 420px at 86% 18%, rgba(220,235,245,.55), rgba(220,235,245,0) 70%),
    linear-gradient(180deg,#FBFDFF 0%,var(--bg) 100%);
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(20,103,159,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(20,103,159,.045) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(680px 380px at 30% 30%,#000 0%,transparent 75%);
  -webkit-mask-image:radial-gradient(680px 380px at 30% 30%,#000 0%,transparent 75%);
  pointer-events:none;
}
.hero .container{position:relative;z-index:1}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:500;color:var(--brand-700);
  background:var(--brand-050);border:1px solid var(--brand-100);
  border-radius:999px;padding:5px 14px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--mint-600)}
.hero h1{
  margin:20px 0 0;
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.16;font-weight:700;color:var(--ink-900);
  letter-spacing:0;
}
.hero h1 em{font-style:normal;color:var(--brand-600)}
.hero-sub{
  margin-top:20px;font-size:17px;line-height:1.78;color:var(--ink-700);
  max-width:34em;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.trust-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:0 20px;
  margin-top:34px;font-size:13px;color:var(--ink-500);
}
.trust-row span{display:inline-flex;align-items:center;gap:6px;padding:6px 0}
.trust-row span+span{border-left:1px solid var(--line);padding-left:20px}
.trust-row i{width:6px;height:6px;border-radius:50%;background:var(--brand-500);display:inline-block}
.hero-figure{position:relative}
.hero-card{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);background:#fff;box-shadow:var(--shadow-lg);
}
.hero-card img{width:100%;height:auto;aspect-ratio:16/11;object-fit:cover}
.hero-float{
  position:absolute;left:18px;bottom:18px;right:18px;
  background:rgba(255,255,255,.94);
  border:1px solid var(--line);border-radius:var(--radius-md);
  padding:14px 16px;box-shadow:var(--shadow-sm);
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.hero-float .k{font-size:13px;color:var(--ink-500)}
.hero-float .v{font-size:15px;font-weight:600;color:var(--ink-900);margin-top:2px}
.hero-float .pill{
  font-size:12px;font-weight:500;color:var(--mint-600);
  background:rgba(31,158,134,.08);border:1px solid rgba(31,158,134,.22);
  border-radius:999px;padding:4px 10px;white-space:nowrap;
}
@media (max-width:991px){
  .hero{padding:52px 0 60px}
  .hero-figure{margin-top:40px}
}
@media (max-width:576px){
  .hero{padding:40px 0 48px}
  .hero-sub{font-size:16px}
  .hero-actions{gap:12px}
  .hero-actions .btn-brand,.hero-actions .btn-ghost{flex:1 1 auto}
  .trust-row{gap:0 14px}
  .trust-row span+span{padding-left:14px}
}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-white{background:#fff}
.section-head{max-width:720px;margin-bottom:40px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-tag{
  font-size:13px;font-weight:600;color:var(--brand-600);letter-spacing:.02em;
  display:inline-flex;align-items:center;gap:8px;
}
.section-tag::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--brand-600)}
.section-head h2{
  margin-top:12px;font-size:clamp(24px,3vw,32px);line-height:1.28;
  font-weight:700;color:var(--ink-900);
}
.section-head p{margin-top:14px;font-size:16px;color:var(--ink-700)}
.section-head.split{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
@media (max-width:768px){
  .section{padding:52px 0}
  .section-head{margin-bottom:28px}
  .section-head.split{flex-direction:column;align-items:flex-start;gap:16px}
}

/* value strip */
.value-strip{
  display:flex;align-items:flex-start;gap:32px;
  padding:34px 0 0;border-top:1px solid var(--line);
}
.value-strip .lead{flex:0 0 200px}
.value-strip .lead h2{font-size:20px;line-height:1.4;font-weight:700;color:var(--ink-900)}
.value-strip .lead p{margin-top:8px;font-size:13.5px;color:var(--ink-500)}
.value-items{display:flex;flex:1;gap:0}
.value-item{flex:1;padding:0 28px;border-left:1px solid var(--line)}
.value-item:first-child{border-left:0;padding-left:0}
.value-item .num{
  font-size:13px;font-weight:700;color:var(--brand-500);letter-spacing:.06em;
}
.value-item h3{margin-top:8px;font-size:17px;font-weight:600;color:var(--ink-900)}
.value-item p{margin-top:6px;font-size:14px;color:var(--ink-500);line-height:1.7}
@media (max-width:991px){
  .value-strip{flex-direction:column;gap:24px}
  .value-strip .lead{flex:none}
  .value-items{flex-direction:column;gap:20px}
  .value-item{border-left:0;padding:0;padding-top:20px;border-top:1px solid var(--line)}
  .value-item:first-child{border-top:0;padding-top:0}
}

/* feature asym */
.feature-hero{
  display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:32px;box-shadow:var(--shadow-sm);
}
.feature-hero h3{font-size:clamp(20px,2.2vw,24px);font-weight:700;color:var(--ink-900);line-height:1.35}
.feature-hero p{margin-top:12px;font-size:15.5px;color:var(--ink-700)}
.feature-hero .checklist{margin-top:20px;display:grid;gap:10px}
.checklist li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-700)}
.checklist li svg{flex-shrink:0;margin-top:5px}
.feature-hero figure{margin:0;border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--line);background:var(--brand-050)}
.feature-hero figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
@media (max-width:991px){
  .feature-hero{grid-template-columns:1fr;padding:24px;gap:24px}
  .feature-hero figure{order:-1}
}

.feature-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px;margin-top:24px}
.feature-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:24px;box-shadow:var(--shadow-xs);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  display:flex;flex-direction:column;
}
.feature-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--brand-100)}
.feature-card.wide{grid-row:span 1}
.feature-card .ico{
  width:40px;height:40px;border-radius:10px;background:var(--brand-050);
  border:1px solid var(--brand-100);display:grid;place-items:center;margin-bottom:16px;
}
.feature-card h3{font-size:18px;font-weight:600;color:var(--ink-900)}
.feature-card p{margin-top:8px;font-size:14.5px;color:var(--ink-500);line-height:1.75}
.feature-card .mini-shot{margin-top:18px;border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--line)}
.feature-card .mini-shot img{width:100%;aspect-ratio:16/9;object-fit:cover}
.feature-card .more{margin-top:auto;padding-top:16px}
@media (max-width:991px){
  .feature-grid{grid-template-columns:1fr 1fr}
  .feature-card.wide{grid-column:1/-1}
}
@media (max-width:576px){
  .feature-grid{grid-template-columns:1fr}
}

.tag-list{display:grid;grid-template-columns:1fr 1fr;gap:14px 32px;margin-top:40px}
.tag-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--ink-700)}
.tag-list li svg{flex-shrink:0;margin-top:5px}
@media (max-width:768px){.tag-list{grid-template-columns:1fr;gap:12px;margin-top:28px}}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;margin-top:8px}
.steps::before{
  content:"";position:absolute;left:8%;right:8%;top:19px;height:1px;background:var(--line);
}
.step{position:relative;padding-right:28px}
.step .dot{
  width:38px;height:38px;border-radius:50%;background:#fff;
  border:1px solid var(--brand-100);color:var(--brand-600);
  display:grid;place-items:center;font-size:14px;font-weight:700;
  position:relative;z-index:1;box-shadow:var(--shadow-xs);
}
.step h3{margin-top:18px;font-size:17px;font-weight:600;color:var(--ink-900)}
.step p{margin-top:6px;font-size:14px;color:var(--ink-500);line-height:1.72}
@media (max-width:991px){
  .steps{grid-template-columns:1fr 1fr;gap:28px 0}
  .steps::before{display:none}
}
@media (max-width:768px){
  .steps{grid-template-columns:1fr;gap:0;border-left:1px solid var(--line);margin-left:19px;padding-left:0}
  .step{padding:0 0 26px 24px}
  .step .dot{position:absolute;left:-19px;top:0}
  .step h3{margin-top:2px}
}

/* case */
.case-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px}
.case-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:26px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;
  transition:transform .18s ease,box-shadow .18s ease;
}
.case-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.case-card .badge-soft{
  align-self:flex-start;font-size:12.5px;font-weight:500;color:var(--brand-700);
  background:var(--brand-050);border:1px solid var(--brand-100);border-radius:999px;padding:4px 12px;
}
.case-card h3{margin-top:16px;font-size:18px;font-weight:600;color:var(--ink-900);line-height:1.45}
.case-card p{margin-top:10px;font-size:14.5px;color:var(--ink-500);line-height:1.75}
.case-metric{margin-top:22px;padding-top:18px;border-top:1px solid var(--line)}
.case-metric .n{font-size:28px;font-weight:700;color:var(--brand-600);line-height:1.1;letter-spacing:-.01em}
.case-metric .t{font-size:12.5px;color:var(--ink-500);margin-top:4px}
.case-summary{
  background:var(--brand-050);border:1px solid var(--brand-100);
  border-radius:var(--radius-lg);padding:26px;display:flex;flex-direction:column;justify-content:center;
}
.case-summary .row-item+.row-item{margin-top:20px;padding-top:20px;border-top:1px solid rgba(20,103,159,.14)}
.case-summary .n{font-size:26px;font-weight:700;color:var(--brand-800);line-height:1.15}
.case-summary .t{font-size:13px;color:var(--ink-500);margin-top:4px}
@media (max-width:991px){.case-grid{grid-template-columns:1fr 1fr}}
@media (max-width:768px){.case-grid{grid-template-columns:1fr}}

/* price */
.price-head{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.seg{
  display:inline-flex;background:var(--bg-alt);border:1px solid var(--line);
  border-radius:999px;padding:4px;
}
.seg span{
  font-size:13.5px;padding:6px 18px;border-radius:999px;color:var(--ink-500);cursor:default;
}
.seg span.on{background:#fff;color:var(--ink-900);font-weight:600;box-shadow:var(--shadow-xs)}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:32px;align-items:stretch}
.price-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:28px 26px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;position:relative;
}
.price-card.featured{border:2px solid var(--sand-600);box-shadow:var(--shadow-lg)}
.price-card .flag{
  position:absolute;top:-13px;right:20px;font-size:12px;font-weight:600;
  color:#fff;background:var(--sand-600);border-radius:999px;padding:4px 12px;
}
.price-card h3{font-size:17px;font-weight:700;color:var(--ink-900)}
.price-card .pos{margin-top:6px;font-size:13.5px;color:var(--ink-500)}
.price-num{margin-top:22px;display:flex;align-items:baseline;gap:6px}
.price-num .n{font-size:34px;font-weight:700;color:var(--ink-900);line-height:1;letter-spacing:-.01em}
.price-num .u{font-size:13px;color:var(--ink-500)}
.price-list{margin:24px 0 0;display:grid;gap:12px}
.price-list li{display:flex;gap:10px;font-size:15px;color:var(--ink-700)}
.price-list li svg{flex-shrink:0;margin-top:5px}
.price-card .cta{margin-top:auto;padding-top:28px}
.price-card .cta .btn-brand,.price-card .cta .btn-ghost{width:100%}
.price-note{margin-top:20px;font-size:13px;color:var(--ink-500)}
@media (max-width:991px){.price-grid{grid-template-columns:1fr;gap:20px}}
@media (max-width:576px){.price-card{padding:24px 20px}}

/* posts */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{
  display:flex;flex-direction:column;height:100%;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow-xs);color:inherit;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--brand-100);color:inherit}
.post-thumb{background:var(--bg-alt);overflow:hidden}
.post-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s ease}
.post-card:hover .post-thumb img{transform:scale(1.03)}
.post-body{padding:20px;display:flex;flex-direction:column;flex:1}
.tag{
  align-self:flex-start;font-size:12.5px;font-weight:500;color:var(--brand-700);
  background:var(--brand-050);border:1px solid var(--brand-100);
  border-radius:999px;padding:3px 10px;
}
.post-body h3{
  margin-top:12px;font-size:17px;font-weight:600;color:var(--ink-900);line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-body p{
  margin-top:8px;font-size:14px;color:var(--ink-500);line-height:1.72;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;
  font-size:12.5px;color:var(--ink-500);
}
.post-meta .arrow{color:var(--brand-600);font-weight:500}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--radius-md);
  padding:40px 24px;text-align:center;background:#fff;
}
.empty-state .ph{
  width:48px;height:48px;border-radius:12px;background:var(--brand-050);
  display:grid;place-items:center;margin:0 auto 14px;
}
.empty-state p{font-size:16px;color:var(--ink-700)}
.empty-state .btn-ghost{margin-top:18px}
@media (max-width:991px){.post-grid{grid-template-columns:1fr 1fr}}
@media (max-width:768px){.post-grid{grid-template-columns:1fr}}

/* faq */
.faq-wrap{max-width:860px;margin:0 auto}
.accordion-item{
  background:transparent;border:0;border-bottom:1px solid var(--line);
}
.accordion-item:first-child{border-top:1px solid var(--line)}
.accordion-button{
  display:flex;align-items:center;width:100%;
  background:transparent;border:0;box-shadow:none!important;
  padding:22px 0 22px 0;font-size:16.5px;font-weight:600;color:var(--ink-900);
  line-height:1.5;text-align:left;
  transition:color .18s ease,padding .18s ease;
}
.accordion-button:hover{color:var(--brand-600)}
.accordion-button::before{
  content:"";width:3px;height:18px;border-radius:2px;background:var(--brand-600);
  margin-right:14px;flex-shrink:0;opacity:0;transition:opacity .18s ease;
}
.accordion-button:not(.collapsed)::before{opacity:1}
.accordion-button::after{display:none}
.accordion-button .pm{
  margin-left:auto;flex-shrink:0;width:22px;height:22px;position:relative;
}
.accordion-button .pm::before,.accordion-button .pm::after{
  content:"";position:absolute;background:var(--brand-600);border-radius:2px;transition:transform .18s ease,opacity .18s ease;
}
.accordion-button .pm::before{left:3px;top:10px;width:16px;height:2px}
.accordion-button .pm::after{left:10px;top:3px;width:2px;height:16px}
.accordion-button:not(.collapsed) .pm::after{transform:rotate(90deg);opacity:0}
.accordion-button:not(.collapsed){color:var(--brand-800)}
.accordion-body{padding:0 0 24px 17px;font-size:15.5px;line-height:1.85;color:var(--ink-700);max-width:72ch}
@media (max-width:576px){
  .accordion-button{font-size:16px;padding:18px 0}
  .accordion-body{padding:0 0 20px 0;font-size:15px}
}

/* cta band */
.cta-band{
  background:var(--brand-050);border:1px solid var(--brand-100);
  border-radius:20px;padding:40px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
}
.cta-band h2{font-size:clamp(22px,2.6vw,28px);font-weight:700;color:var(--ink-900);line-height:1.32}
.cta-band p{margin-top:10px;font-size:15px;color:var(--ink-700);max-width:46em}
.cta-band .actions{display:flex;gap:14px;flex-wrap:wrap;flex-shrink:0}
@media (max-width:991px){
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 24px;gap:24px}
  .cta-band .actions{width:100%}
  .cta-band .actions .btn-brand,.cta-band .actions .btn-ghost{flex:1 1 auto}
}

/* footer */
.site-footer{background:var(--brand-800);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .brand-text{color:#fff}
.footer-brand .brand-mark{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.18)}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.75;color:rgba(255,255,255,.68);max-width:30em}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col li+li{margin-top:10px}
.footer-col a,.footer-col span{font-size:14px;color:rgba(255,255,255,.72);line-height:1.6}
.footer-col a:hover{color:#fff}
.footer-bottom{
  margin-top:48px;padding:20px 0 24px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.6);
}
.footer-bottom .links{display:flex;gap:18px;flex-wrap:wrap}
.footer-bottom a{color:rgba(255,255,255,.7)}
.footer-bottom a:hover{color:#fff}
@media (max-width:991px){
  .site-footer{padding:48px 0 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:576px){
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .feature-card:hover,.post-card:hover,.case-card:hover{transform:none}
}

/* roulang page: article */
:root{
  --brand-800:#0C3F63;
  --brand-700:#0F4E7A;
  --brand-600:#14679F;
  --brand-500:#2A87C2;
  --brand-100:#DCEBF5;
  --brand-050:#F0F7FC;
  --mint-600:#1F9E86;
  --sand-600:#D97B2B;
  --ink-900:#0B1B2B;
  --ink-700:#29415A;
  --ink-500:#5D7388;
  --ink-300:#9AAEC0;
  --line:#E3EAF2;
  --bg:#F5F8FB;
  --bg-alt:#EDF3F8;
  --surface:#FFFFFF;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --r-pill:999px;
  --shadow-xs:0 1px 2px rgba(11,27,43,.06);
  --shadow-sm:0 4px 12px rgba(11,27,43,.05);
  --shadow-md:0 10px 30px rgba(11,27,43,.07);
  --shadow-lg:0 20px 48px rgba(11,27,43,.10);
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",Inter,system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.78;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-800);}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;}

.container{
  width:100%;
  max-width:1200px;
  margin-left:auto;
  margin-right:auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:1400px){.container{max-width:1280px;}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease,background .2s ease;
}
.site-header.is-scrolled{
  box-shadow:var(--shadow-sm);
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:68px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:28px;
  height:28px;
  border-radius:8px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:var(--brand-050);
  border:1px solid var(--brand-100);
}
.brand-text{
  font-size:17px;
  font-weight:700;
  color:var(--ink-900);
  white-space:nowrap;
}
.brand-text span{color:var(--brand-600);}

.main-nav{
  display:flex;
  align-items:center;
  gap:26px;
}
.main-nav a{
  position:relative;
  font-size:14.5px;
  font-weight:500;
  color:var(--ink-700);
  padding:6px 0;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:-8px;
  width:0;
  height:2px;
  border-radius:2px;
  background:var(--brand-600);
  transform:translateX(-50%);
  transition:width .18s ease;
}
.main-nav a:hover{color:var(--brand-600);}
.main-nav a:hover::after,
.main-nav a.active::after{width:18px;}
.main-nav a.active{color:var(--brand-600);font-weight:600;}

.header-tools{display:flex;align-items:center;gap:14px;}
.command-search{
  display:flex;
  align-items:center;
  gap:8px;
  width:240px;
  height:40px;
  padding:0 10px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.command-search:focus-within{
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px var(--brand-100);
}
.command-search svg{flex-shrink:0;color:var(--ink-500);}
.command-search input{
  flex:1;
  min-width:0;
  border:0;
  outline:0;
  background:transparent;
  font-size:13.5px;
  color:var(--ink-900);
  font-family:inherit;
}
.command-search input::placeholder{color:var(--ink-300);}
.command-search kbd{
  font-family:inherit;
  font-size:11px;
  padding:2px 6px;
  border-radius:6px;
  background:var(--bg-alt);
  color:var(--ink-500);
  border:1px solid var(--line);
}
.link-quiet{
  font-size:14px;
  color:var(--ink-700);
  white-space:nowrap;
}
.link-quiet:hover{color:var(--brand-600);}

/* ============ 按钮 ============ */
.btn-brand,
.btn-ghost,
.btn-quiet{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-size:15px;
  font-weight:500;
  height:48px;
  padding:0 24px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn-brand{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-xs);}
.btn-brand:hover{background:var(--brand-700);color:#fff;}
.btn-brand:active{transform:translateY(1px);}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-900);}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-600);background:var(--brand-050);}
.btn-quiet{
  height:auto;
  padding:0;
  background:transparent;
  color:var(--brand-600);
  font-size:14.5px;
  font-weight:500;
}
.btn-quiet:hover{color:var(--brand-800);}
.btn-brand.sm{height:40px;padding:0 16px;font-size:14px;}

.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  background:#fff;
  color:var(--ink-900);
  cursor:pointer;
}
.nav-toggle:hover{border-color:var(--brand-500);color:var(--brand-600);}

.mobile-drawer{
  display:none;
  border-top:1px solid var(--line);
  background:#fff;
  padding:12px 0 20px;
}
.mobile-drawer.open{display:block;}
.mobile-drawer .drawer-label{
  font-size:13px;
  color:var(--ink-500);
  padding:12px 24px 8px;
}
.mobile-drawer a.drawer-link{
  display:flex;
  align-items:center;
  min-height:48px;
  padding:0 24px;
  font-size:16px;
  color:var(--ink-900);
  border-bottom:1px solid var(--line);
}
.mobile-drawer a.drawer-link:hover{background:var(--brand-050);color:var(--brand-600);}
.mobile-drawer .drawer-cta{padding:16px 24px 0;}
.mobile-drawer .drawer-cta .btn-brand{width:100%;}
.mobile-drawer .drawer-search{padding:8px 24px 0;}
.mobile-drawer .drawer-search .command-search{width:100%;}

/* ============ 文章头部 ============ */
.article-hero{
  background:#fff;
  border-bottom:1px solid var(--line);
  padding:28px 0 34px;
}
.breadcrumb-row{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--ink-500);
  margin-bottom:20px;
}
.breadcrumb-row a{color:var(--ink-500);}
.breadcrumb-row a:hover{color:var(--brand-600);}
.breadcrumb-row .sep{color:var(--ink-300);}
.breadcrumb-row .current{color:var(--ink-900);}

.badge-soft{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:13px;
  font-weight:500;
  color:var(--brand-700);
  background:var(--brand-050);
  border:1px solid var(--brand-100);
  border-radius:var(--r-pill);
  padding:4px 12px;
  line-height:1.6;
}
.article-title{
  font-size:clamp(26px,3.6vw,40px);
  line-height:1.24;
  margin:16px 0 0;
  max-width:900px;
  word-break:break-word;
}
.article-meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  margin-top:18px;
  font-size:13px;
  color:var(--ink-500);
}
.article-meta .dot{color:var(--ink-300);}

/* ============ 正文布局 ============ */
.article-section{padding:40px 0 8px;}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:32px;
  align-items:start;
}
.article-main{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-sm);
  padding:40px 44px 48px;
  min-width:0;
}

.prose{
  font-size:17px;
  line-height:1.9;
  color:var(--ink-700);
  word-break:break-word;
}
.prose > *:first-child{margin-top:0;}
.prose p{margin:0 0 1.1em;}
.prose h2{
  position:relative;
  font-size:clamp(21px,2.4vw,27px);
  line-height:1.35;
  color:var(--ink-900);
  margin:42px 0 16px;
  padding-left:14px;
}
.prose h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.38em;
  width:3px;
  height:18px;
  border-radius:2px;
  background:var(--brand-600);
}
.prose h3{
  font-size:20px;
  line-height:1.45;
  color:var(--ink-900);
  margin:30px 0 12px;
}
.prose h4{
  font-size:17px;
  color:var(--ink-900);
  margin:24px 0 10px;
}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.35em;}
.prose li{margin:8px 0;line-height:1.9;}
.prose ul > li::marker{color:var(--brand-600);}
.prose ol > li::marker{color:var(--brand-600);font-weight:600;}
.prose blockquote{
  margin:26px 0;
  padding:18px 22px;
  background:var(--brand-050);
  border-left:3px solid var(--brand-600);
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--ink-700);
  font-size:16px;
}
.prose blockquote p:last-child{margin-bottom:0;}
.prose img{
  max-width:100%;
  border-radius:var(--r-md);
  margin:24px auto;
  box-shadow:var(--shadow-sm);
}
.prose figure{margin:26px 0;}
.prose figcaption{
  font-size:13px;
  color:var(--ink-500);
  text-align:center;
  margin-top:10px;
}
.prose table{
  width:100%;
  border-collapse:collapse;
  margin:24px 0;
  font-size:15px;
  border-top:1px solid var(--line);
}
.prose th,.prose td{
  padding:12px 14px;
  border-bottom:1px solid var(--line);
  text-align:left;
  vertical-align:top;
}
.prose th{background:var(--bg-alt);color:var(--ink-900);font-weight:600;}
.prose a{
  color:var(--brand-600);
  text-decoration:underline;
  text-underline-offset:3px;
}
.prose a:hover{color:var(--brand-800);}
.prose code{
  font-size:.9em;
  background:var(--bg-alt);
  color:var(--brand-700);
  border-radius:6px;
  padding:2px 6px;
}
.prose hr{border:0;border-top:1px solid var(--line);margin:32px 0;}

/* ============ 空状态 ============ */
.empty-state{
  border:1px dashed var(--line);
  border-radius:var(--r-md);
  padding:44px 28px;
  text-align:center;
  background:var(--bg);
}
.empty-icon{
  width:48px;
  height:48px;
  margin:0 auto 16px;
  border-radius:12px;
  background:var(--brand-050);
  border:1px solid var(--brand-100);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--brand-600);
}
.empty-title{font-size:17px;font-weight:600;color:var(--ink-900);margin-bottom:8px;}
.empty-text{font-size:14.5px;color:var(--ink-500);max-width:46ch;margin:0 auto 20px;}

/* ============ 侧栏 ============ */
.article-side{
  position:sticky;
  top:92px;
  display:grid;
  gap:20px;
}
.side-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-top:3px double var(--brand-100);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-sm);
  padding:22px;
}
.side-title{
  font-size:14px;
  font-weight:600;
  color:var(--ink-900);
  margin-bottom:14px;
  letter-spacing:.02em;
}
.side-list{list-style:none;display:grid;gap:2px;}
.side-list a{
  display:block;
  padding:10px 12px;
  border-radius:var(--r-sm);
  font-size:14.5px;
  color:var(--ink-900);
  border-left:2px solid transparent;
  transition:background .18s ease,border-color .18s ease,color .18s ease;
}
.side-list a span{
  display:block;
  font-size:12.5px;
  color:var(--ink-500);
  margin-top:2px;
}
.side-list a:hover{
  background:var(--brand-050);
  border-left-color:var(--brand-600);
  color:var(--brand-700);
}
.side-note .note-text{font-size:14px;color:var(--ink-700);line-height:1.8;}
.side-note .side-mail{
  margin-top:12px;
  font-size:13.5px;
  color:var(--ink-500);
  padding-top:12px;
  border-top:1px solid var(--line);
}

/* ============ 继续了解 ============ */
.related-section{padding:64px 0 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
  margin-bottom:28px;
}
.section-head h2{
  font-size:clamp(22px,2.8vw,30px);
  line-height:1.3;
}
.section-head p{
  font-size:14.5px;
  color:var(--ink-500);
  margin-top:8px;
  max-width:60ch;
}
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.info-card{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  color:inherit;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.info-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-md);
  border-color:var(--brand-100);
  color:inherit;
}
.info-card .thumb{
  aspect-ratio:16/9;
  background:var(--bg-alt);
  overflow:hidden;
}
.info-card .thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .3s ease;
}
.info-card:hover .thumb img{transform:scale(1.03);}
.info-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.info-body h3{font-size:17px;line-height:1.5;font-weight:600;}
.info-body p{font-size:14px;color:var(--ink-500);line-height:1.75;}
.card-link{
  margin-top:auto;
  font-size:14px;
  font-weight:500;
  color:var(--brand-600);
  display:inline-flex;
  align-items:center;
  gap:6px;
}

/* ============ CTA ============ */
.cta-band{padding:64px 0 0;}
.cta-inner{
  background:var(--brand-050);
  border:1px solid var(--brand-100);
  border-radius:20px;
  padding:40px 44px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.cta-inner h2{
  font-size:clamp(20px,2.4vw,26px);
  line-height:1.35;
  max-width:22ch;
}
.cta-inner p{
  font-size:14.5px;
  color:var(--ink-700);
  margin-top:10px;
  max-width:56ch;
}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--brand-800);
  color:rgba(255,255,255,.72);
  margin-top:80px;
  padding-top:60px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand .brand-mark{
  background:rgba(255,255,255,.08);
  border-color:rgba(255,255,255,.16);
}
.footer-brand .brand-text{color:#fff;}
.footer-brand .brand-text span{color:#BFD9EC;}
.footer-brand p{
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.72);
  max-width:36ch;
}
.footer-col h4{
  font-size:15px;
  font-weight:600;
  color:#fff;
  margin-bottom:16px;
}
.footer-col ul{list-style:none;display:grid;gap:10px;}
.footer-col a,
.footer-col span{
  font-size:14px;
  color:rgba(255,255,255,.72);
  line-height:1.7;
}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.6);
}
.footer-bottom .links{display:flex;gap:18px;flex-wrap:wrap;}
.footer-bottom a{color:rgba(255,255,255,.72);font-size:13px;}
.footer-bottom a:hover{color:#fff;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr);}
  .article-side{position:static;grid-template-columns:repeat(2,minmax(0,1fr));}
  .article-main{padding:34px 34px 40px;}
}
@media (max-width:991px){
  .main-nav{display:none;}
  .command-search{display:none;}
  .link-quiet{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-inner{height:60px;gap:12px;}
  .brand-text{font-size:16px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .cta-inner{padding:32px;}
  .article-side{grid-template-columns:minmax(0,1fr);}
}
@media (max-width:767px){
  .container{padding-left:18px;padding-right:18px;}
  .article-hero{padding:22px 0 26px;}
  .article-main{padding:26px 22px 32px;border-radius:var(--r-md);}
  .prose{font-size:16px;line-height:1.85;}
  .prose h2{margin-top:34px;}
  .article-title{font-size:clamp(23px,6vw,30px);}
  .btn-brand,.btn-ghost{height:44px;padding:0 18px;font-size:14.5px;}
  .btn-brand.sm{height:40px;}
  .card-grid{grid-template-columns:minmax(0,1fr);gap:16px;}
  .related-section{padding-top:48px;}
  .cta-band{padding-top:48px;}
  .cta-inner{padding:26px 22px;border-radius:16px;}
  .cta-actions{width:100%;}
  .cta-actions .btn-brand,.cta-actions .btn-ghost{flex:1;}
  .site-footer{padding-top:44px;margin-top:60px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;padding-bottom:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:575px){
  .container{padding-left:16px;padding-right:16px;}
  .article-meta{font-size:12.5px;}
  .side-card{padding:18px;}
  .empty-state{padding:32px 18px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
  .info-card:hover{transform:none;}
}

/* roulang page: category1 */
:root{
  --brand-800:#0C3F63;
  --brand-700:#0F4E7A;
  --brand-600:#14679F;
  --brand-500:#2A87C2;
  --brand-100:#DCEBF5;
  --brand-050:#F0F7FC;
  --mint-600:#1F9E86;
  --sand-600:#D97B2B;
  --ink-900:#0B1B2B;
  --ink-700:#29415A;
  --ink-500:#5D7388;
  --ink-300:#9AAEC0;
  --line:#E3EAF2;
  --bg:#F5F8FB;
  --bg-alt:#EDF3F8;
  --surface:#FFFFFF;
  --shadow-xs:0 1px 2px rgba(11,27,43,.06);
  --shadow-sm:0 4px 12px rgba(11,27,43,.05);
  --shadow-md:0 10px 30px rgba(11,27,43,.07);
  --shadow-lg:0 20px 48px rgba(11,27,43,.10);
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --font-sans:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.78;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-800)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700}
p{margin:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:1200px){.container{max-width:1240px}}
@media (max-width:768px){.container{padding-left:18px;padding-right:18px}}
@media (max-width:576px){.container{padding-left:16px;padding-right:16px}}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:2000;
  background:var(--brand-600);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;
}
.skip-link:focus{left:0;color:#fff}

/* ---------- 顶部命令栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-sm);background:rgba(255,255,255,.92)}
.header-inner{
  display:flex;align-items:center;gap:20px;
  height:68px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:30px;height:30px;border-radius:9px;
  background:var(--brand-600);
  display:grid;place-items:center;
  box-shadow:var(--shadow-xs);
}
.brand-text{
  font-size:17px;font-weight:700;color:var(--ink-900);
  letter-spacing:-.01em;white-space:nowrap;
}
.brand-text span{color:var(--brand-600)}
.brand:hover .brand-text{color:var(--ink-900)}

.main-nav{display:flex;align-items:center;gap:2px;margin-left:6px}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:9px 12px 11px;
  font-size:14.5px;font-weight:500;
  color:var(--ink-700);
  border-radius:8px;
  white-space:nowrap;
}
.main-nav a:hover{color:var(--brand-600);background:var(--brand-050)}
.main-nav a.active{color:var(--brand-600);font-weight:600}
.main-nav a.active::after{
  content:"";position:absolute;left:50%;bottom:2px;
  width:18px;height:2px;border-radius:2px;
  background:var(--brand-600);transform:translateX(-50%);
}

.header-tools{display:flex;align-items:center;gap:14px;margin-left:auto}
.cmd-search{
  display:flex;align-items:center;gap:8px;
  width:240px;height:40px;padding:0 10px;
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-sm);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.cmd-search:focus-within{border-color:var(--brand-500);box-shadow:0 0 0 3px var(--brand-100)}
.cmd-search svg{flex-shrink:0;color:var(--ink-300)}
.cmd-search input{
  flex:1;min-width:0;border:0;outline:none;background:transparent;
  font-size:13.5px;color:var(--ink-900);
}
.cmd-search input::placeholder{color:var(--ink-300)}
.cmd-search kbd{
  font-family:var(--font-sans);font-size:11px;color:var(--ink-500);
  background:var(--bg-alt);border-radius:6px;padding:2px 6px;line-height:1.4;
}
.link-login{font-size:14px;color:var(--ink-700);white-space:nowrap}
.link-login:hover{color:var(--brand-600)}

.btn-brand,.btn-ghost,.btn-quiet{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  border-radius:var(--radius-sm);
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
  text-align:center;
}
.btn-brand{
  height:48px;padding:0 24px;
  background:var(--brand-600);color:#fff;
  box-shadow:var(--shadow-xs);
}
.btn-brand:hover{background:var(--brand-700);color:#fff}
.btn-brand:active{transform:translateY(1px)}
.btn-brand.small{height:40px;padding:0 18px;font-size:14.5px}
.btn-ghost{
  height:48px;padding:0 22px;
  background:#fff;color:var(--ink-900);
  border-color:var(--line);
}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-600);background:var(--brand-050)}
.btn-ghost.small{height:40px;padding:0 16px;font-size:14.5px}
.btn-quiet{
  height:auto;padding:0;background:none;border:0;
  color:var(--brand-600);font-size:14.5px;font-weight:600;
}
.btn-quiet:hover{color:var(--brand-800)}

.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;padding:0;
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-sm);color:var(--ink-900);cursor:pointer;
}
.nav-toggle:hover{border-color:var(--brand-500);color:var(--brand-600)}

/* 移动抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,27,43,.34);
  opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease;
  z-index:1040;
}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(330px,88vw);
  background:#fff;z-index:1050;
  transform:translateX(104%);
  transition:transform .24s ease;
  padding:22px 22px 28px;
  overflow-y:auto;
  box-shadow:var(--shadow-lg);
  display:flex;flex-direction:column;gap:22px;
}
body.drawer-open .drawer-mask{opacity:1;visibility:visible}
body.drawer-open .mobile-drawer{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{
  width:36px;height:36px;border-radius:9px;border:1px solid var(--line);
  background:#fff;color:var(--ink-700);cursor:pointer;font-size:18px;line-height:1;
}
.drawer-close:hover{border-color:var(--brand-500);color:var(--brand-600)}
.drawer-label{font-size:13px;color:var(--ink-500);font-weight:500;margin-bottom:8px}
.drawer-nav{display:flex;flex-direction:column}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;font-size:16px;color:var(--ink-700);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.active{color:var(--brand-600);font-weight:600}
.drawer-search{
  display:flex;align-items:center;gap:8px;height:44px;padding:0 12px;
  border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--bg);
}
.drawer-search input{border:0;background:transparent;outline:none;font-size:14px;width:100%;color:var(--ink-900)}
.drawer-cta{display:flex;flex-direction:column;gap:10px}
.drawer-cta .btn-brand,.drawer-cta .btn-ghost{width:100%}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section.alt{background:var(--bg-alt)}
@media (max-width:991px){.section{padding:72px 0}}
@media (max-width:576px){.section{padding:52px 0}}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--brand-600);margin-bottom:12px;
}
.eyebrow::before{
  content:"";width:18px;height:2px;border-radius:2px;background:var(--brand-600);
}
.section-head{max-width:740px;margin-bottom:40px}
.section-head h2{font-size:clamp(24px,3vw,32px);line-height:1.28;margin-bottom:14px}
.section-head p{color:var(--ink-500);font-size:15.5px;line-height:1.85}
@media (max-width:576px){.section-head{margin-bottom:28px}}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:500;line-height:1.5;
  padding:5px 12px;border-radius:999px;
  background:var(--brand-050);color:var(--brand-700);
  border:1px solid var(--brand-100);
}
.tag-sand{background:#FDF3E9;color:#B4621F;border-color:#F3DDC6}
.tag-mint{background:#EAF7F4;color:#177A67;border-color:#CFEBE4}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:72px 0 64px;
  background:var(--bg);
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(620px 420px at 86% 18%,rgba(42,135,194,.13),transparent 70%);
}
.hero-inner{
  position:relative;
  display:grid;grid-template-columns:1.04fr .96fr;
  gap:56px;align-items:center;
}
@media (max-width:991px){
  .hero{padding:52px 0 56px}
  .hero-inner{grid-template-columns:1fr;gap:36px}
}
.hero h1{
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.16;
  letter-spacing:-.01em;
  margin:16px 0 18px;
}
.hero h1 em{font-style:normal;color:var(--brand-600)}
.hero-lead{
  font-size:16.5px;line-height:1.85;color:var(--ink-700);
  max-width:36em;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-actions .btn-brand,.hero-actions .btn-ghost{height:48px}
@media (max-width:576px){
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn-brand,.hero-actions .btn-ghost{height:46px;width:100%}
}
.hero-points{
  display:flex;flex-wrap:wrap;align-items:center;gap:0;
  margin-top:30px;font-size:13px;color:var(--ink-500);
}
.hero-points span{padding:0 14px;border-left:1px solid var(--line)}
.hero-points span:first-child{padding-left:0;border-left:0}
@media (max-width:576px){
  .hero-points{row-gap:8px}
  .hero-points span{padding:0 10px}
}

.hero-visual{position:relative}
.hero-shot{
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:10px;
  box-shadow:var(--shadow-lg);
}
.hero-shot img{
  width:100%;border-radius:10px;object-fit:cover;aspect-ratio:4/3;
}
.hero-float{
  position:absolute;left:-16px;bottom:24px;
  background:rgba(255,255,255,.96);
  border:1px solid var(--line);border-radius:14px;
  padding:14px 18px;box-shadow:var(--shadow-md);
  backdrop-filter:blur(6px);
  min-width:168px;
}
.hero-float .fr{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  font-size:13px;color:var(--ink-500);
}
.hero-float .fr + .fr{margin-top:8px;padding-top:8px;border-top:1px dashed var(--line)}
.hero-float .fr strong{font-size:17px;color:var(--brand-600);letter-spacing:-.01em}
@media (max-width:576px){.hero-float{left:8px;bottom:12px;padding:12px 14px}}

/* ---------- 信任条 ---------- */
.trust-strip{
  background:#fff;border-bottom:1px solid var(--line);
}
.trust-list{
  display:grid;grid-template-columns:repeat(4,1fr);
  padding:26px 0;
}
.trust-list li{
  padding:0 22px;border-left:1px solid var(--line);
}
.trust-list li:first-child{border-left:0;padding-left:0}
.trust-list strong{
  display:block;font-size:22px;font-weight:700;color:var(--ink-900);
  letter-spacing:-.01em;line-height:1.3;
}
.trust-list span{font-size:13px;color:var(--ink-500)}
@media (max-width:768px){
  .trust-list{grid-template-columns:repeat(2,1fr);row-gap:22px}
  .trust-list li{padding:0 16px}
  .trust-list li:nth-child(odd){border-left:0;padding-left:0}
}
@media (max-width:400px){
  .trust-list{grid-template-columns:1fr}
  .trust-list li{border-left:0;padding:0}
}

/* ---------- 步骤 ---------- */
.step-list{display:flex;flex-direction:column}
.step{display:grid;grid-template-columns:92px 1fr;gap:0}
.step-num{
  font-size:32px;line-height:1.15;font-weight:700;
  color:var(--brand-500);letter-spacing:-.02em;padding-top:2px;
}
.step-body{
  border-left:1px solid var(--line);
  padding:0 0 34px 28px;
}
.step:last-child .step-body{padding-bottom:0}
.step-body h3{font-size:20px;line-height:1.4;margin-bottom:8px}
.step-body p{font-size:15.5px;line-height:1.85;color:var(--ink-700);max-width:70ch}
.step-body .step-note{
  margin-top:12px;display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-500);
  background:var(--brand-050);border:1px solid var(--brand-100);
  border-radius:999px;padding:5px 12px;
}
@media (max-width:576px){
  .step{grid-template-columns:56px 1fr}
  .step-num{font-size:24px}
  .step-body{padding:0 0 28px 18px}
  .step-body h3{font-size:18px}
}

/* ---------- 卡片 ---------- */
.card-soft{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:24px;
  box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card-soft:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-md);
  border-color:var(--brand-100);
}
@media (max-width:576px){
  .card-soft{padding:20px}
  .card-soft:hover{transform:none}
}

.tip-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:24px;
}
@media (max-width:768px){.tip-grid{grid-template-columns:1fr;gap:16px}}
.tip-card{display:flex;flex-direction:column;height:100%}
.tip-icon{
  width:40px;height:40px;border-radius:10px;
  background:var(--brand-050);border:1px solid var(--brand-100);
  display:grid;place-items:center;color:var(--brand-600);
  margin-bottom:16px;
}
.tip-card h3{font-size:17px;line-height:1.5;margin-bottom:12px}
.tick-list li{
  position:relative;padding-left:24px;
  font-size:15px;line-height:1.8;color:var(--ink-700);
}
.tick-list li + li{margin-top:8px}
.tick-list li::before{
  content:"";position:absolute;left:0;top:10px;
  width:12px;height:7px;
  border-left:2px solid var(--brand-600);
  border-bottom:2px solid var(--brand-600);
  transform:rotate(-45deg);border-radius:1px;
}

/* ---------- 对照 ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px}
@media (max-width:768px){.compare{grid-template-columns:1fr;gap:16px}}
.compare-col{
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:28px;
  box-shadow:var(--shadow-xs);
}
@media (max-width:576px){.compare-col{padding:20px}}
.compare-col.ok{border-top:3px solid var(--mint-600)}
.compare-col.warn{border-top:3px solid var(--sand-600)}
.compare-col h3{font-size:18px;margin-bottom:16px;display:flex;align-items:center;gap:10px}
.compare-col .dot{
  width:10px;height:10px;border-radius:50%;display:inline-block;
}
.compare-col.ok .dot{background:var(--mint-600)}
.compare-col.warn .dot{background:var(--sand-600)}
.compare-list li{
  position:relative;padding-left:22px;
  font-size:15px;line-height:1.8;color:var(--ink-700);
}
.compare-list li + li{margin-top:10px}
.compare-list li::before{
  content:"";position:absolute;left:2px;top:12px;
  width:6px;height:6px;border-radius:50%;
}
.compare-col.ok .compare-list li::before{background:var(--mint-600)}
.compare-col.warn .compare-list li::before{background:var(--sand-600)}

/* ---------- 相关分类 ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
@media (max-width:768px){.rel-grid{grid-template-columns:1fr;gap:16px}}
.rel-card{
  position:relative;display:block;
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:26px 60px 26px 26px;
  box-shadow:var(--shadow-xs);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.rel-card:hover{
  transform:translateY(-2px);
  border-color:var(--brand-100);
  box-shadow:var(--shadow-md);
}
@media (max-width:576px){.rel-card{padding:20px 52px 20px 20px}}
.rel-idx{
  display:inline-block;font-size:12.5px;font-weight:600;
  color:var(--brand-600);letter-spacing:.06em;margin-bottom:8px;
}
.rel-card h3{font-size:18px;line-height:1.4;margin-bottom:8px;color:var(--ink-900)}
.rel-card p{font-size:14.5px;line-height:1.75;color:var(--ink-500)}
.rel-arrow{
  position:absolute;right:22px;top:50%;transform:translateY(-50%);
  width:32px;height:32px;border-radius:50%;
  border:1px solid var(--line);background:var(--brand-050);
  display:grid;place-items:center;color:var(--brand-600);
  font-size:15px;transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.rel-card:hover .rel-arrow{background:var(--brand-600);color:#fff;border-color:var(--brand-600)}

/* ---------- CTA ---------- */
.cta-wrap{padding:0 0 96px}
@media (max-width:991px){.cta-wrap{padding-bottom:72px}}
@media (max-width:576px){.cta-wrap{padding-bottom:52px}}
.cta-band{
  background:var(--brand-050);
  border:1px solid var(--brand-100);
  border-radius:20px;
  padding:40px;
  display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(22px,2.6vw,28px);line-height:1.3;margin-bottom:10px}
.cta-band p{font-size:15px;line-height:1.8;color:var(--ink-700);max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media (max-width:768px){
  .cta-band{padding:28px 22px}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn-brand,.cta-actions .btn-ghost{width:100%}
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--brand-800);
  color:rgba(255,255,255,.72);
  padding:64px 0 24px;
  font-size:14px;
}
.footer-grid{
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px;
}
@media (max-width:991px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media (max-width:576px){.footer-grid{grid-template-columns:1fr;gap:28px}}
.footer-brand .brand-text{color:#fff;font-size:17px}
.footer-brand .brand-text span{color:#8FC4E6}
.footer-brand p{
  margin-top:16px;font-size:14px;line-height:1.85;
  color:rgba(255,255,255,.68);max-width:36ch;
}
.footer-col h4{
  color:#fff;font-size:15px;font-weight:600;margin-bottom:16px;
}
.footer-col ul li{font-size:14px;line-height:1.8}
.footer-col ul li + li{margin-top:10px}
.footer-col a{color:rgba(255,255,255,.72)}
.footer-col a:hover{color:#fff}
.footer-col span{color:rgba(255,255,255,.62)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:14px;
  margin-top:44px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:rgba(255,255,255,.6);
}
.footer-bottom .links{display:flex;gap:18px;flex-wrap:wrap}
.footer-bottom .links a{color:rgba(255,255,255,.72)}
.footer-bottom .links a:hover{color:#fff}

@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
  .card-soft:hover,.rel-card:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --brand-800:#0C3F63;
  --brand-700:#0F4E7A;
  --brand-600:#14679F;
  --brand-500:#2A87C2;
  --brand-100:#DCEBF5;
  --brand-050:#F0F7FC;
  --mint-600:#1F9E86;
  --sand-600:#D97B2B;
  --ink-900:#0B1B2B;
  --ink-700:#29415A;
  --ink-500:#5D7388;
  --ink-300:#9AAEC0;
  --line:#E3EAF2;
  --bg:#F5F8FB;
  --bg-alt:#EDF3F8;
  --surface:#FFFFFF;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-xs:0 1px 2px rgba(11,27,43,.06);
  --shadow-sm:0 4px 12px rgba(11,27,43,.05);
  --shadow-md:0 10px 30px rgba(11,27,43,.07);
  --shadow-lg:0 20px 48px rgba(11,27,43,.10);
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC","Inter",system-ui,sans-serif;

  --bs-primary:#14679F;
  --bs-primary-rgb:20,103,159;
  --bs-body-color:#29415A;
  --bs-body-bg:#F5F8FB;
  --bs-border-color:#E3EAF2;
  --bs-border-radius:12px;
  --bs-link-color:#14679F;
  --bs-link-hover-color:#0C3F63;
  --bs-font-sans-serif:var(--font-sans);
}

*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.78;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;transition:color .18s ease;}
a:hover{color:var(--brand-800);}
h1,h2,h3,h4,h5{margin:0;color:var(--ink-900);font-weight:700;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:1400px){
  .container{max-width:1280px;}
}
@media (max-width:768px){
  .container{padding-left:18px;padding-right:18px;}
}
@media (max-width:576px){
  .container{padding-left:16px;padding-right:16px;}
}

/* ---------- Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .18s ease,background .18s ease;
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  box-shadow:var(--shadow-sm);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:68px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  flex:0 0 auto;
}
.brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:30px;
  height:30px;
}
.brand-text{
  font-size:17px;
  font-weight:700;
  color:var(--ink-900);
  letter-spacing:0;
  line-height:1.2;
}
.brand-text span{color:var(--brand-600);}

.main-nav{
  display:flex;
  align-items:center;
  gap:26px;
  margin-left:6px;
}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:21px 0;
  font-size:14.5px;
  font-weight:500;
  color:var(--ink-700);
  text-decoration:none;
  transition:color .18s ease;
  white-space:nowrap;
}
.main-nav a:hover{color:var(--brand-600);}
.main-nav a.active{color:var(--brand-600);}
.main-nav a.active::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:9px;
  transform:translateX(-50%);
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--brand-600);
}

.header-actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:14px;
}
.command-search{
  position:relative;
  display:flex;
  align-items:center;
  width:240px;
  height:40px;
  padding:0 42px 0 34px;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:#fff;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.command-search:focus-within{
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px var(--brand-100);
}
.command-search i{
  position:absolute;
  left:12px;
  font-size:13px;
  color:var(--ink-300);
  pointer-events:none;
}
.command-search input{
  width:100%;
  border:0;
  outline:0;
  background:transparent;
  font-size:14px;
  color:var(--ink-900);
  line-height:40px;
}
.command-search input::placeholder{color:var(--ink-300);}
.command-search .kbd{
  position:absolute;
  right:8px;
  font-size:11px;
  line-height:1;
  padding:4px 6px;
  border-radius:6px;
  background:var(--bg-alt);
  color:var(--ink-500);
  border:1px solid var(--line);
}
.link-login{
  font-size:14px;
  color:var(--ink-700);
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s ease;
}
.link-login:hover{color:var(--brand-600);}

.nav-toggle{
  display:none;
  width:40px;
  height:40px;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:#fff;
  color:var(--ink-700);
  font-size:16px;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:border-color .18s ease,color .18s ease;
}
.nav-toggle:hover{border-color:var(--brand-500);color:var(--brand-600);}

.mobile-drawer{
  display:none;
  border-top:1px solid var(--line);
  background:#fff;
  padding:18px 0 22px;
}
.mobile-drawer.open{display:block;}
.mobile-drawer .drawer-search{
  display:flex;
  align-items:center;
  gap:8px;
  height:44px;
  padding:0 14px;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:#fff;
  margin-bottom:14px;
}
.mobile-drawer .drawer-search i{color:var(--ink-300);font-size:14px;}
.mobile-drawer .drawer-search input{
  border:0;outline:0;background:transparent;width:100%;font-size:15px;color:var(--ink-900);
}
.drawer-label{
  font-size:13px;
  color:var(--ink-500);
  font-weight:600;
  padding:6px 2px;
}
.drawer-nav a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:48px;
  font-size:16px;
  color:var(--ink-900);
  text-decoration:none;
  border-bottom:1px solid var(--line);
}
.drawer-nav a.active{color:var(--brand-600);font-weight:600;}
.drawer-nav a i{font-size:12px;color:var(--ink-300);}
.drawer-cta{margin-top:18px;}

/* ---------- Buttons ---------- */
.btn-brand,
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--radius-sm);
  font-size:15px;
  font-weight:500;
  line-height:1;
  text-decoration:none;
  cursor:pointer;
  transition:background .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease;
}
.btn-brand{
  background:var(--brand-600);
  border:1px solid var(--brand-600);
  color:#fff;
  box-shadow:var(--shadow-xs);
}
.btn-brand:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;}
.btn-brand:active{transform:translateY(1px);}
.btn-ghost{
  background:#fff;
  border:1px solid var(--line);
  color:var(--ink-900);
}
.btn-ghost:hover{
  border-color:var(--brand-500);
  color:var(--brand-600);
  background:var(--brand-050);
}
.btn-brand.sm,
.btn-ghost.sm{
  height:40px;
  padding:0 16px;
  font-size:14px;
  border-radius:var(--radius-sm);
}
.btn-quiet{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14.5px;
  font-weight:500;
  color:var(--brand-600);
  text-decoration:none;
  transition:color .18s ease,gap .18s ease;
}
.btn-quiet i{font-size:12px;transition:transform .18s ease;}
.btn-quiet:hover{color:var(--brand-800);}
.btn-quiet:hover i{transform:translateX(3px);}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding:44px 0 58px;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;
  right:-180px;
  top:-140px;
  width:540px;
  height:540px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(20,103,159,.10) 0%,rgba(20,103,159,0) 70%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:1;}
.breadcrumb-line{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-500);
}
.breadcrumb-line a{
  color:var(--ink-500);
  text-decoration:none;
  transition:color .18s ease;
}
.breadcrumb-line a:hover{color:var(--brand-600);}
.breadcrumb-line .sep{color:var(--ink-300);}
.breadcrumb-line .current{color:var(--ink-900);}

.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:22px;
  padding:5px 12px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  color:var(--sand-600);
  background:rgba(217,123,43,.09);
  border:1px solid rgba(217,123,43,.26);
}
.page-hero h1{
  max-width:820px;
  margin-top:16px;
  font-size:clamp(28px,3.6vw,42px);
  line-height:1.18;
  letter-spacing:-.01em;
}
.hero-sub{
  max-width:730px;
  margin-top:16px;
  font-size:17px;
  line-height:1.8;
  color:var(--ink-700);
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:28px;
}
.trust-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:22px;
  margin-top:30px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.trust-item{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-500);
}
.trust-item i{color:var(--mint-600);font-size:13px;}
.trust-item + .trust-item{
  padding-left:22px;
  border-left:1px solid var(--line);
}
@media (max-width:576px){
  .trust-item + .trust-item{padding-left:0;border-left:0;}
  .trust-row{gap:12px;flex-direction:column;align-items:flex-start;}
}

/* ---------- Section base ---------- */
.section{padding:96px 0;}
.section-alt{background:var(--bg-alt);}
.section-head{max-width:760px;margin-bottom:40px;}
.eyebrow{
  display:inline-block;
  font-size:13px;
  font-weight:600;
  letter-spacing:.05em;
  color:var(--brand-600);
  margin-bottom:10px;
}
.section-head h2{
  font-size:clamp(24px,3vw,32px);
  line-height:1.28;
}
.section-head p{
  margin-top:14px;
  font-size:16px;
  line-height:1.8;
  color:var(--ink-700);
}
@media (max-width:991px){
  .section{padding:72px 0;}
}
@media (max-width:767px){
  .section{padding:52px 0;}
  .section-head{margin-bottom:28px;}
}

/* ---------- Matrix cards ---------- */
.matrix-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.matrix-card{
  height:100%;
  padding:26px 24px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-xs);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.matrix-card:hover{
  border-color:var(--brand-100);
  box-shadow:var(--shadow-sm);
}
.icon-box{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  margin-bottom:14px;
  border-radius:var(--radius-sm);
  background:var(--brand-050);
  border:1px solid var(--brand-100);
  color:var(--brand-600);
  font-size:16px;
}
.matrix-card h3{
  font-size:18px;
  line-height:1.4;
  font-weight:600;
  margin-bottom:8px;
}
.matrix-card p{
  font-size:15px;
  line-height:1.78;
  color:var(--ink-700);
}
@media (max-width:991px){
  .matrix-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
}
@media (max-width:576px){
  .matrix-grid{grid-template-columns:1fr;gap:16px;}
  .matrix-card{padding:20px;}
}

/* ---------- Chain bar ---------- */
.chain-bar{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:0;
  padding:28px 30px;
  background:var(--brand-050);
  border:1px solid var(--brand-100);
  border-radius:var(--radius-lg);
}
.chain-step{padding-right:24px;}
.chain-step + .chain-step{
  padding-left:28px;
  border-left:1px dashed rgba(20,103,159,.28);
  padding-right:24px;
}
.chain-step:last-child{padding-right:0;}
.chain-num{
  display:inline-block;
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--brand-500);
  margin-bottom:8px;
}
.chain-step h3{
  font-size:17px;
  font-weight:600;
  line-height:1.45;
  margin-bottom:6px;
}
.chain-step p{
  font-size:14px;
  line-height:1.75;
  color:var(--ink-500);
}
@media (max-width:767px){
  .chain-bar{grid-template-columns:1fr;padding:22px;}
  .chain-step{padding:0 0 18px;}
  .chain-step + .chain-step{
    padding:18px 0 0;
    border-left:0;
    border-top:1px dashed rgba(20,103,159,.28);
  }
  .chain-step:last-child{padding-bottom:0;}
}

/* ---------- Split blocks ---------- */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:52px;
  align-items:center;
}
.split + .split{margin-top:72px;}
@media (max-width:991px){
  .split{grid-template-columns:1fr;gap:30px;}
  .split + .split{margin-top:52px;}
}
.split-body h2{
  font-size:clamp(22px,2.6vw,28px);
  line-height:1.3;
  margin-bottom:16px;
}
.split-body p{
  font-size:16px;
  line-height:1.85;
  color:var(--ink-700);
}
.check-list{margin-top:22px;display:grid;gap:12px;}
.check-list li{
  position:relative;
  padding-left:28px;
  font-size:15px;
  line-height:1.75;
  color:var(--ink-700);
}
.check-list li i{
  position:absolute;
  left:0;
  top:5px;
  font-size:13px;
  color:var(--brand-600);
}
.check-list li strong{color:var(--ink-900);font-weight:600;}
.figure-frame{
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-sm);
  background:var(--surface);
}
.figure-frame img{
  width:100%;
  height:auto;
  object-fit:cover;
}
.figure-caption{
  padding:12px 16px;
  font-size:13px;
  color:var(--ink-500);
  border-top:1px solid var(--line);
  background:var(--surface);
}

/* ---------- QA grid ---------- */
.qa-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
}
.qa-item{
  padding:24px 26px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.qa-item:hover{border-color:var(--brand-100);box-shadow:var(--shadow-sm);}
.qa-item h3{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:16.5px;
  font-weight:600;
  line-height:1.5;
  margin-bottom:10px;
}
.qa-item h3 span{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:24px;
  height:24px;
  border-radius:8px;
  background:var(--brand-050);
  border:1px solid var(--brand-100);
  color:var(--brand-600);
  font-size:12px;
  font-weight:700;
  margin-top:1px;
}
.qa-item p{
  font-size:15px;
  line-height:1.82;
  color:var(--ink-700);
}
@media (max-width:767px){
  .qa-grid{grid-template-columns:1fr;gap:16px;}
  .qa-item{padding:20px;}
}

/* ---------- Related categories ---------- */
.related-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
}
.related-card{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:24px 26px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  text-decoration:none;
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.related-card:hover{
  transform:translateY(-2px);
  border-color:var(--brand-100);
  box-shadow:var(--shadow-md);
}
.related-card h3{
  font-size:17px;
  font-weight:600;
  color:var(--ink-900);
  margin-bottom:6px;
}
.related-card p{
  font-size:14px;
  line-height:1.7;
  color:var(--ink-500);
}
.related-card .arrow{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:36px;
  height:36px;
  border-radius:999px;
  background:var(--brand-050);
  border:1px solid var(--brand-100);
  color:var(--brand-600);
  font-size:13px;
  transition:background .18s ease,color .18s ease;
}
.related-card:hover .arrow{background:var(--brand-600);color:#fff;}
@media (max-width:767px){
  .related-grid{grid-template-columns:1fr;}
  .related-card{padding:20px;}
}

/* ---------- CTA band ---------- */
.cta-wrap{padding-bottom:96px;}
.cta-band{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:40px 44px;
  background:var(--brand-050);
  border:1px solid var(--brand-100);
  border-radius:20px;
}
.cta-band h2{
  font-size:clamp(22px,2.6vw,28px);
  line-height:1.32;
}
.cta-band p{
  margin-top:10px;
  font-size:15px;
  line-height:1.78;
  color:var(--ink-700);
  max-width:620px;
}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  flex:0 0 auto;
}
@media (max-width:991px){
  .cta-wrap{padding-bottom:72px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px;}
}
@media (max-width:767px){
  .cta-wrap{padding-bottom:52px;}
  .cta-band{padding:26px 22px;border-radius:16px;}
  .cta-actions{width:100%;}
  .cta-actions .btn-brand,
  .cta-actions .btn-ghost{flex:1 1 auto;min-width:160px;}
}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--brand-800);
  color:rgba(255,255,255,.72);
  padding:64px 0 0;
  font-size:14px;
  line-height:1.75;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand .brand-text{color:#fff;font-size:17px;}
.footer-brand .brand-text span{color:var(--brand-100);}
.footer-brand p{
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.72);
  max-width:340px;
}
.footer-col h4{
  font-size:15px;
  font-weight:600;
  color:#fff;
  margin-bottom:16px;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col ul li a{
  font-size:14px;
  color:rgba(255,255,255,.72);
  text-decoration:none;
  transition:color .18s ease;
}
.footer-col ul li a:hover{color:#fff;}
.footer-col ul li span{
  font-size:14px;
  color:rgba(255,255,255,.72);
}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-top:48px;
  padding:20px 0 28px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;
  color:rgba(255,255,255,.6);
}
.footer-bottom .links{display:flex;gap:20px;}
.footer-bottom .links a{
  color:rgba(255,255,255,.6);
  text-decoration:none;
  transition:color .18s ease;
}
.footer-bottom .links a:hover{color:#fff;}
@media (max-width:991px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand p{max-width:none;}
}
@media (max-width:767px){
  .site-footer{padding-top:48px;}
}
@media (max-width:576px){
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px;line-height:1.9;}
}

/* ---------- Responsive header ---------- */
@media (max-width:1199px){
  .command-search{width:200px;}
  .main-nav{gap:20px;}
}
@media (max-width:991px){
  .main-nav{display:none;}
  .command-search{display:none;}
  .link-login{display:none;}
  .header-actions .btn-brand.sm{padding:0 14px;font-size:13.5px;}
  .nav-toggle{display:inline-flex;}
  .header-inner{height:60px;gap:16px;}
  .brand-text{font-size:16px;}
}
@media (max-width:576px){
  .header-actions .btn-brand.sm{height:38px;padding:0 12px;}
  .header-actions .btn-brand.sm .btn-label{display:none;}
  .header-actions .btn-brand.sm i{margin:0;}
}

@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category3 */
:root{
  --brand-800:#0C3F63;
  --brand-700:#0F4E7A;
  --brand-600:#14679F;
  --brand-500:#2A87C2;
  --brand-100:#DCEBF5;
  --brand-050:#F0F7FC;
  --mint-600:#1F9E86;
  --sand-600:#D97B2B;
  --ink-900:#0B1B2B;
  --ink-700:#29415A;
  --ink-500:#5D7388;
  --ink-300:#9AAEC0;
  --line:#E3EAF2;
  --bg:#F5F8FB;
  --bg-alt:#EDF3F8;
  --surface:#FFFFFF;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-xs:0 1px 2px rgba(11,27,43,.06);
  --shadow-sm:0 4px 12px rgba(11,27,43,.05);
  --shadow-md:0 10px 30px rgba(11,27,43,.07);
  --shadow-lg:0 20px 48px rgba(11,27,43,.10);
  --font-sans:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.78;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-800)}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;line-height:1.28}
h1{font-size:clamp(30px,4.2vw,44px);line-height:1.16;letter-spacing:-.01em}
h2{font-size:clamp(24px,3vw,32px);line-height:1.28}
h3{font-size:20px;line-height:1.4;font-weight:600}
h4{font-size:17px;line-height:1.5;font-weight:600}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
::selection{background:var(--brand-100);color:var(--brand-800)}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .18s ease,background .18s ease;
}
.site-header.is-scrolled{
  box-shadow:var(--shadow-sm);
  background:rgba(255,255,255,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:68px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:28px;height:28px;border-radius:8px;
  background:var(--brand-050);
  border:1px solid var(--brand-100);
  display:grid;place-items:center;
}
.brand-text{font-size:17px;font-weight:700;color:var(--ink-900);letter-spacing:-.01em;white-space:nowrap}
.brand-text span{color:var(--brand-600);margin-left:2px}

.main-nav{display:flex;align-items:center;gap:2px;margin-left:6px;flex-wrap:nowrap}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:9px 11px;
  font-size:14.5px;
  font-weight:500;
  color:var(--ink-700);
  border-radius:8px;
  white-space:nowrap;
}
.main-nav a:hover{color:var(--brand-600);background:var(--brand-050)}
.main-nav a.active{color:var(--brand-600)}
.main-nav a.active::after{
  content:"";position:absolute;left:50%;bottom:1px;transform:translateX(-50%);
  width:18px;height:2px;border-radius:2px;background:var(--brand-600);
}

.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.command-search{
  display:flex;align-items:center;gap:8px;
  width:240px;height:40px;padding:0 10px 0 12px;
  border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.command-search:focus-within{border-color:var(--brand-500);box-shadow:0 0 0 3px var(--brand-100)}
.command-search svg{flex:0 0 auto;color:var(--ink-300)}
.command-search input{
  width:100%;border:0;outline:0;background:transparent;
  font-size:14px;color:var(--ink-900);line-height:1.4;
}
.command-search input::placeholder{color:var(--ink-300)}
.kbd{
  flex:0 0 auto;font-size:11px;line-height:1;color:var(--ink-500);
  background:var(--bg-alt);border:1px solid var(--line);border-radius:6px;padding:4px 6px;
}
.quick-link{font-size:14px;font-weight:500;color:var(--ink-700);white-space:nowrap}
.quick-link:hover{color:var(--brand-600)}

.btn-brand{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-sm);
  background:var(--brand-600);border:1px solid var(--brand-600);color:#fff;
  font-size:15px;font-weight:500;line-height:1;
  box-shadow:var(--shadow-xs);
  transition:background .18s ease,border-color .18s ease,color .18s ease;
}
.btn-brand:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff}
.btn-brand:active{transform:translateY(1px)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--radius-sm);
  background:#fff;border:1px solid var(--line);color:var(--ink-900);
  font-size:15px;font-weight:500;line-height:1;
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-600);background:var(--brand-050)}
.btn-quiet{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:500;color:var(--brand-600);
}
.btn-quiet:hover{color:var(--brand-800)}
.header-actions .btn-brand{height:40px;padding:0 16px;font-size:14px}

.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  border:1px solid var(--line);background:#fff;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
  cursor:pointer;
}
.nav-toggle span{display:block;width:16px;height:2px;border-radius:2px;background:var(--ink-700);transition:background .18s ease}
.nav-toggle:hover span{background:var(--brand-600)}

.mobile-drawer{border-top:1px solid var(--line);background:#fff}
.mobile-drawer .drawer-inner{padding:16px 0 24px}
.drawer-search{
  display:flex;align-items:center;gap:8px;height:44px;padding:0 12px;
  border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff;margin-bottom:16px;
}
.drawer-search input{border:0;outline:0;width:100%;font-size:15px;background:transparent;color:var(--ink-900)}
.drawer-nav{display:grid;gap:2px;margin-bottom:16px}
.drawer-nav a{
  display:flex;align-items:center;height:48px;padding:0 12px;border-radius:10px;
  font-size:16px;color:var(--ink-700);border-bottom:1px solid var(--line);
}
.drawer-nav a.active{color:var(--brand-600);font-weight:600;background:var(--brand-050)}
.drawer-cta{width:100%}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding:40px 0 64px;
  background:var(--brand-050);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  opacity:.16;
  filter:saturate(.7);
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(900px 420px at 88% 0%, rgba(255,255,255,.9), rgba(240,247,252,0) 70%);
}
.page-hero .container{position:relative;z-index:1}

.breadcrumb-trail{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-500);margin-bottom:18px;
}
.breadcrumb-trail a{color:var(--ink-500)}
.breadcrumb-trail a:hover{color:var(--brand-600)}
.breadcrumb-trail .sep{color:var(--ink-300)}
.breadcrumb-trail .current{color:var(--ink-900)}

.hero-inner{max-width:800px}
.eyebrow-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 12px;border-radius:999px;
  background:#fff;border:1px dashed var(--brand-500);
  color:var(--brand-700);font-size:13px;font-weight:500;
  margin-bottom:18px;
}
.eyebrow-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--mint-600)}
.page-hero h1{margin-bottom:16px}
.hero-lead{font-size:17px;line-height:1.85;color:var(--ink-700);max-width:720px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  margin-top:26px;font-size:13px;color:var(--ink-500);
}
.hero-meta .bar{width:1px;height:14px;background:var(--line)}

/* ---------- 板块 ---------- */
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:760px;margin-bottom:40px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:600;color:var(--brand-600);letter-spacing:.02em;
  margin-bottom:12px;
}
.eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--brand-500)}
.section-head h2{margin-bottom:12px}
.section-desc{font-size:16px;line-height:1.85;color:var(--ink-500);max-width:720px}

/* ---------- 模块矩阵 ---------- */
.mod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.mod-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:24px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.mod-card:hover{border-color:var(--brand-100);box-shadow:var(--shadow-xs)}
.mod-icon{
  width:40px;height:40px;border-radius:10px;
  background:var(--brand-050);border:1px solid var(--brand-100);
  display:grid;place-items:center;color:var(--brand-600);
  margin-bottom:16px;
}
.mod-card h3{font-size:17px;font-weight:600;margin-bottom:8px}
.mod-card p{font-size:14.5px;line-height:1.75;color:var(--ink-500)}
.mod-tag{
  display:inline-block;margin-top:14px;
  font-size:12.5px;color:var(--brand-700);
  background:var(--brand-050);border-radius:999px;padding:3px 10px;
}

/* ---------- 模块衔接条 ---------- */
.flow-bar{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:28px;
  display:grid;
  grid-template-columns:1fr auto 1fr auto 1fr;
  gap:18px;
  align-items:center;
  box-shadow:var(--shadow-sm);
}
.flow-step .step-no{
  display:inline-block;font-size:12.5px;font-weight:600;color:var(--brand-600);
  background:var(--brand-050);border-radius:6px;padding:2px 8px;margin-bottom:10px;
  letter-spacing:.04em;
}
.flow-step h3{font-size:17px;margin-bottom:6px}
.flow-step p{font-size:14px;line-height:1.75;color:var(--ink-500)}
.flow-arrow{color:var(--brand-500);display:grid;place-items:center}

/* ---------- 图文分栏 ---------- */
.split{
  display:grid;grid-template-columns:1fr 1fr;
  gap:56px;align-items:center;
}
.split + .split{margin-top:72px}
.split-body h2{margin-bottom:14px}
.split-body p{font-size:16px;line-height:1.85;color:var(--ink-700)}
.split-media{position:relative}
.split-media img{
  width:100%;border-radius:var(--radius-md);
  border:1px solid var(--line);
  box-shadow:var(--shadow-md);
}
.split-media figcaption{
  margin-top:12px;font-size:13px;color:var(--ink-500);text-align:center;
}
.split.reverse .split-media{order:-1}

.check-list{display:grid;gap:12px;margin-top:24px}
.check-list li{
  position:relative;padding-left:26px;
  font-size:15.5px;line-height:1.75;color:var(--ink-700);
}
.check-list li::before{
  content:"";position:absolute;left:3px;top:8px;
  width:10px;height:5px;
  border-left:2px solid var(--brand-600);
  border-bottom:2px solid var(--brand-600);
  transform:rotate(-45deg);
}
.note-line{
  margin-top:24px;padding:14px 18px;
  background:var(--brand-050);border-left:3px solid var(--brand-500);
  border-radius:0 10px 10px 0;
  font-size:14.5px;line-height:1.8;color:var(--brand-800);
}

/* ---------- 提示卡 ---------- */
.tip-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:56px}
.tip-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-md);padding:24px;
}
.tip-card .tip-head{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.tip-card .tip-head span{
  width:28px;height:28px;border-radius:8px;display:grid;place-items:center;
  background:var(--brand-050);color:var(--brand-600);font-size:13px;font-weight:600;
}
.tip-card h3{font-size:16.5px}
.tip-card p{font-size:14.5px;line-height:1.8;color:var(--ink-500)}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px}
.faq-item{border-bottom:1px solid var(--line);padding:20px 0;transition:padding .18s ease}
.faq-item summary{
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  cursor:pointer;list-style:none;
  font-size:16.5px;font-weight:600;color:var(--ink-900);line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";flex:0 0 auto;color:var(--brand-600);
  font-size:20px;font-weight:400;line-height:1;
  transition:color .18s ease;
}
.faq-item[open]{border-left:3px solid var(--brand-600);padding-left:16px}
.faq-item[open] summary::after{content:"−"}
.faq-item p{margin-top:12px;font-size:15.5px;line-height:1.85;color:var(--ink-700);max-width:72ch}
.faq-more{margin-top:28px;display:flex;align-items:center;gap:10px;font-size:14px;color:var(--ink-500)}

/* ---------- 相关分类 ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.rel-card{
  display:block;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-md);
  padding:22px 20px;
  transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.rel-card:hover{border-color:var(--brand-100);box-shadow:var(--shadow-sm);transform:translateY(-2px);color:inherit}
.rel-card h3{font-size:16px;margin-bottom:6px}
.rel-card p{font-size:13.5px;line-height:1.7;color:var(--ink-500);min-height:46px}
.rel-card .rel-arrow{
  display:inline-flex;align-items:center;gap:6px;margin-top:14px;
  font-size:13px;font-weight:500;color:var(--brand-600);
}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--brand-050);
  border:1px solid var(--brand-100);
  border-radius:20px;
  padding:40px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
}
.cta-band h2{font-size:clamp(22px,2.4vw,26px);margin-bottom:8px}
.cta-band p{font-size:15px;line-height:1.8;color:var(--ink-500);max-width:56ch}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;flex:0 0 auto}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--brand-800);
  color:rgba(255,255,255,.72);
  padding:64px 0 24px;
  margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .brand-mark{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.16)}
.footer-brand .brand-text{color:#fff}
.footer-brand .brand-text span{color:#9FD2F2}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;max-width:340px;color:rgba(255,255,255,.72)}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a,.footer-col span{font-size:14px;color:rgba(255,255,255,.72);line-height:1.7}
.footer-col a:hover{color:#fff}
.footer-bottom{
  margin-top:48px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.6);
}
.footer-bottom .links{display:flex;gap:16px}
.footer-bottom .links a{font-size:13px;color:rgba(255,255,255,.6)}
.footer-bottom .links a:hover{color:#fff}

@media (prefers-reduced-motion: reduce){
  *{transition:none !important;animation:none !important}
  .rel-card:hover{transform:none}
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .command-search{width:200px}
  .main-nav a{padding:9px 9px;font-size:14px}
  .header-inner{gap:14px}
}
@media (max-width:991px){
  .main-nav{display:none}
  .nav-toggle{display:flex}
  .header-inner{height:60px}
  .brand-text{font-size:16px}
  .command-search{display:none}
  .quick-link{display:none}
  .section{padding:72px 0}
  .page-hero{padding:32px 0 52px}
  .mod-grid{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:28px}
  .split.reverse .split-media{order:0}
  .split + .split{margin-top:56px}
  .flow-bar{grid-template-columns:1fr;gap:14px;padding:24px}
  .flow-arrow{transform:rotate(90deg);justify-items:start;margin-left:8px}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
}
@media (max-width:767px){
  .section{padding:52px 0}
  .mod-grid{grid-template-columns:1fr}
  .tip-grid{grid-template-columns:1fr;margin-top:40px}
  .hero-actions .btn-brand,.hero-actions .btn-ghost{width:100%}
  .hero-meta{gap:10px;font-size:12.5px}
  .section-head{margin-bottom:28px}
  .cta-actions{width:100%}
  .cta-actions .btn-brand,.cta-actions .btn-ghost{width:100%}
}
@media (max-width:575px){
  .container{padding-left:16px;padding-right:16px}
  .rel-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .page-hero{padding:26px 0 44px}
  .hero-lead{font-size:16px}
}
@media (min-width:992px){
  .mobile-drawer{display:none !important}
}

/* roulang page: category4 */
:root{
  --brand-800:#0C3F63;
  --brand-700:#0F4E7A;
  --brand-600:#14679F;
  --brand-500:#2A87C2;
  --brand-100:#DCEBF5;
  --brand-050:#F0F7FC;
  --mint-600:#1F9E86;
  --sand-600:#D97B2B;
  --ink-900:#0B1B2B;
  --ink-700:#29415A;
  --ink-500:#5D7388;
  --ink-300:#9AAEC0;
  --line:#E3EAF2;
  --bg:#F5F8FB;
  --bg-alt:#EDF3F8;
  --surface:#FFFFFF;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-xs:0 1px 2px rgba(11,27,43,.06);
  --shadow-sm:0 4px 12px rgba(11,27,43,.05);
  --shadow-md:0 10px 30px rgba(11,27,43,.07);
  --shadow-lg:0 20px 48px rgba(11,27,43,.10);

  --bs-body-font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --bs-body-color:#29415A;
  --bs-body-bg:#F5F8FB;
  --bs-border-color:#E3EAF2;
  --bs-border-radius:12px;
  --bs-link-color:#14679F;
  --bs-link-hover-color:#0C3F63;
  --bs-primary:#14679F;
  --bs-accordion-active-bg:transparent;
  --bs-accordion-active-color:#0F4E7A;
  --bs-accordion-border-color:#E3EAF2;
  --bs-accordion-btn-focus-box-shadow:none;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.78;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-800);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--ink-900);}
p{margin:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;}

/* 容器 */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:1400px){
  .container{max-width:1280px;}
}
@media (max-width:767px){
  .container{padding-left:18px;padding-right:18px;}
}
@media (max-width:575px){
  .container{padding-left:16px;padding-right:16px;}
}

/* 顶部导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  transition:box-shadow .18s ease,background .18s ease;
}
.site-header.scrolled{
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  box-shadow:var(--shadow-sm);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:26px;
  height:68px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  flex:0 0 auto;
}
.brand-mark{
  width:28px;
  height:28px;
  border-radius:9px;
  background:var(--brand-600);
  color:#DCEBF5;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex:0 0 auto;
}
.brand-text{
  font-size:17px;
  font-weight:700;
  color:var(--ink-900);
  letter-spacing:-.01em;
  white-space:nowrap;
}
.brand-text span{color:var(--brand-600);}
.main-nav{
  display:flex;
  align-items:center;
  gap:22px;
  margin-right:auto;
}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:14.5px;
  font-weight:500;
  color:var(--ink-700);
}
.main-nav a:hover{color:var(--brand-600);}
.main-nav a.active{color:var(--brand-600);}
.main-nav a.active::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:-2px;
  transform:translateX(-50%);
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--brand-600);
}
.header-actions{
  display:flex;
  align-items:center;
  gap:14px;
  flex:0 0 auto;
}
.command-search{
  display:flex;
  align-items:center;
  gap:8px;
  width:240px;
  height:40px;
  padding:0 10px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.command-search svg{color:var(--ink-300);flex:0 0 auto;}
.command-search input{
  flex:1 1 auto;
  width:100%;
  min-width:0;
  border:0;
  outline:0;
  background:transparent;
  font-size:13.5px;
  color:var(--ink-900);
}
.command-search input::placeholder{color:var(--ink-300);}
.command-search .kbd{
  flex:0 0 auto;
  font-size:11px;
  line-height:1;
  padding:4px 6px;
  color:var(--ink-500);
  background:var(--bg-alt);
  border:1px solid var(--line);
  border-radius:6px;
}
.command-search:focus-within{
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px var(--brand-100);
}
.link-login{
  font-size:14px;
  font-weight:500;
  color:var(--ink-700);
  white-space:nowrap;
}
.link-login:hover{color:var(--brand-600);}
.nav-toggle{
  display:none;
  width:40px;
  height:40px;
  padding:0;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:#fff;
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
}
.nav-toggle span{
  display:block;
  width:16px;
  height:2px;
  border-radius:2px;
  background:var(--ink-700);
}
.nav-toggle:hover{border-color:var(--brand-500);}

.mobile-drawer{
  display:none;
  background:#fff;
  border-top:1px solid var(--line);
  box-shadow:var(--shadow-sm);
}
.mobile-drawer.open{display:block;}
.drawer-inner{padding:16px 0 22px;}
.drawer-search{width:100%;height:44px;margin-bottom:14px;}
.drawer-nav{display:block;margin-bottom:16px;}
.drawer-nav a{
  display:block;
  padding:0 4px;
  line-height:48px;
  font-size:16px;
  color:var(--ink-700);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.active{color:var(--brand-600);font-weight:600;}
.drawer-cta{width:100%;}

/* 按钮 */
.btn-brand{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border:1px solid var(--brand-600);
  border-radius:var(--radius-sm);
  background:var(--brand-600);
  color:#fff;
  font-size:15px;
  font-weight:500;
  line-height:1;
  box-shadow:var(--shadow-xs);
  transition:background .18s ease,border-color .18s ease,color .18s ease;
}
.btn-brand:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;}
.btn-brand:active{transform:translateY(1px);}
.btn-sm-brand{height:40px;padding:0 18px;font-size:14px;}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 22px;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:#fff;
  color:var(--ink-900);
  font-size:15px;
  font-weight:500;
  line-height:1;
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.btn-ghost:hover{
  border-color:var(--brand-500);
  color:var(--brand-600);
  background:var(--brand-050);
}

/* 面包屑 */
.breadcrumb-nav{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-500);
  margin-bottom:22px;
}
.breadcrumb-nav a{color:var(--ink-500);}
.breadcrumb-nav a:hover{color:var(--brand-600);}
.breadcrumb-nav .current{color:var(--ink-900);font-weight:500;}

/* 首屏 */
.faq-hero{
  position:relative;
  padding:36px 0 56px;
  background:linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.faq-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(circle at 1px 1px,rgba(20,103,159,.09) 1px,transparent 0);
  background-size:22px 22px;
  opacity:.5;
  pointer-events:none;
}
.faq-hero .container{position:relative;z-index:1;}
.hero-inner{max-width:760px;margin:0 auto;text-align:center;}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-bottom:18px;
  padding:5px 14px;
  font-size:13px;
  font-weight:600;
  color:var(--sand-600);
  background:#fff;
  border:1px solid rgba(217,123,43,.34);
  border-radius:999px;
}
.hero-inner h1{
  font-size:clamp(30px,4.2vw,44px);
  line-height:1.18;
  font-weight:700;
  margin-bottom:16px;
}
.hero-sub{
  max-width:640px;
  margin:0 auto 28px;
  font-size:15.5px;
  line-height:1.8;
  color:var(--ink-500);
}
.hero-search{
  display:flex;
  align-items:center;
  gap:10px;
  width:100%;
  max-width:480px;
  margin:0 auto;
  padding:8px 8px 8px 14px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-sm);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.hero-search svg{color:var(--ink-300);flex:0 0 auto;}
.hero-search input{
  flex:1 1 auto;
  min-width:0;
  height:34px;
  border:0;
  outline:0;
  background:transparent;
  font-size:15px;
  color:var(--ink-900);
}
.hero-search input::placeholder{color:var(--ink-300);font-size:13.5px;}
.hero-search .btn-brand{height:40px;padding:0 18px;font-size:14px;flex:0 0 auto;}
.hero-search:focus-within{
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px var(--brand-100),var(--shadow-sm);
}
.search-hint{
  margin-top:14px;
  font-size:13px;
  color:var(--ink-500);
}

/* 主体 */
.section{padding:88px 0;}
.faq-wrap{max-width:1040px;margin:0 auto;}
.group-intro{
  margin-bottom:8px;
  padding-bottom:28px;
}
.group-intro h2{
  font-size:clamp(24px,3vw,32px);
  line-height:1.3;
  margin-bottom:10px;
}
.group-intro p{
  font-size:15px;
  color:var(--ink-500);
  max-width:680px;
}
.faq-group{
  display:grid;
  grid-template-columns:160px minmax(0,1fr);
  gap:40px;
  padding:44px 0;
  border-top:1px solid var(--line);
}
.group-label{
  align-self:start;
  margin-top:26px;
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  color:var(--brand-600);
  line-height:1.5;
}
.group-label::before{
  content:"";
  width:16px;
  height:2px;
  border-radius:2px;
  background:var(--brand-600);
  flex:0 0 auto;
}
.group-title{
  font-size:22px;
  line-height:1.4;
  font-weight:700;
  margin-bottom:8px;
}
.group-desc{
  font-size:14px;
  color:var(--ink-500);
  margin-bottom:18px;
}

/* 手风琴 */
.faq-acc{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);
  padding:0 6px;
  overflow:hidden;
  transition:box-shadow .18s ease,border-color .18s ease;
}
.faq-acc:hover{border-color:var(--brand-100);box-shadow:var(--shadow-md);}
.faq-acc .accordion-item{
  background:transparent;
  border:0;
  border-top:1px solid var(--line);
}
.faq-acc .accordion-item:first-child{border-top:0;}
.faq-acc .accordion-button{
  position:relative;
  background:transparent;
  color:var(--ink-900);
  font-size:16.5px;
  font-weight:600;
  line-height:1.55;
  padding:20px 12px 20px 16px;
  border-radius:0;
  box-shadow:none;
}
.faq-acc .accordion-button:not(.collapsed){
  background:transparent;
  color:var(--brand-700);
  box-shadow:none;
}
.faq-acc .accordion-button:not(.collapsed)::before{
  content:"";
  position:absolute;
  left:0;
  top:16px;
  bottom:16px;
  width:3px;
  border-radius:2px;
  background:var(--brand-600);
}
.faq-acc .accordion-button:hover{color:var(--brand-600);}
.faq-acc .accordion-button:focus{box-shadow:none;}
.faq-acc .accordion-button::after{
  content:"+";
  background-image:none;
  width:auto;
  height:auto;
  min-width:22px;
  margin-left:12px;
  font-size:22px;
  font-weight:400;
  line-height:1;
  color:var(--brand-600);
  display:flex;
  align-items:center;
  justify-content:center;
  transform:none;
  transition:none;
}
.faq-acc .accordion-button:not(.collapsed)::after{
  content:"−";
  transform:none;
}
.faq-acc .accordion-body{
  padding:0 20px 22px 16px;
  font-size:15.5px;
  line-height:1.85;
  color:var(--ink-700);
}
.faq-acc .accordion-body strong{color:var(--ink-900);font-weight:600;}

/* 仍需协助 */
.support-band{padding:8px 0 88px;}
.support-card{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  padding:44px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:var(--shadow-md);
}
.support-figure{
  margin:0 0 22px;
  border-radius:var(--radius-md);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-alt);
}
.support-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.tag{
  display:inline-block;
  margin-bottom:14px;
  padding:4px 12px;
  font-size:12.5px;
  font-weight:600;
  color:var(--brand-600);
  background:var(--brand-050);
  border-radius:999px;
}
.support-copy h2{
  font-size:clamp(22px,2.6vw,28px);
  line-height:1.34;
  margin-bottom:12px;
}
.support-copy p{
  font-size:15px;
  color:var(--ink-500);
  margin-bottom:20px;
}
.support-points li{
  position:relative;
  padding-left:22px;
  margin-bottom:10px;
  font-size:14.5px;
  line-height:1.7;
  color:var(--ink-700);
}
.support-points li::before{
  content:"";
  position:absolute;
  left:0;
  top:9px;
  width:8px;
  height:8px;
  border-radius:50%;
  border:2px solid var(--brand-500);
  background:#fff;
}
.support-form{display:flex;flex-direction:column;}
.form-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.field{margin-bottom:16px;}
.field label{
  display:block;
  margin-bottom:6px;
  font-size:13px;
  font-weight:500;
  color:var(--ink-700);
}
.req{color:var(--sand-600);}
.field input,
.field textarea{
  width:100%;
  font-family:inherit;
  font-size:15px;
  color:var(--ink-900);
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:11px 14px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field input{height:44px;}
.field textarea{min-height:132px;line-height:1.7;resize:vertical;}
.field input::placeholder,
.field textarea::placeholder{color:var(--ink-300);}
.field input:focus,
.field textarea:focus{
  outline:none;
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px var(--brand-100);
}
.support-form .btn-brand{align-self:flex-start;margin-top:4px;}
.form-note{
  min-height:20px;
  margin-top:12px;
  font-size:13.5px;
  line-height:1.6;
}
.form-note.ok{color:var(--mint-600);}
.form-note.err{color:var(--sand-600);}

/* 相关分类 */
.related{padding:0 0 88px;}
.section-head{margin-bottom:32px;}
.section-head h2{
  font-size:clamp(24px,3vw,32px);
  line-height:1.3;
  margin-bottom:8px;
}
.section-head p{font-size:15px;color:var(--ink-500);}
.related-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
}
.related-card{
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:22px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-xs);
  color:inherit;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.related-card:hover{
  transform:translateY(-2px);
  border-color:var(--brand-100);
  box-shadow:var(--shadow-md);
  color:inherit;
}
.rc-tag{
  align-self:flex-start;
  padding:3px 10px;
  font-size:12.5px;
  font-weight:500;
  color:var(--brand-600);
  background:var(--brand-050);
  border-radius:999px;
}
.related-card h3{
  font-size:16px;
  font-weight:600;
  line-height:1.5;
}
.related-card p{
  flex:1 1 auto;
  font-size:13.5px;
  line-height:1.7;
  color:var(--ink-500);
}
.rc-arrow{
  font-size:13px;
  font-weight:500;
  color:var(--brand-600);
}

/* CTA */
.cta-band-wrap{padding:0 0 88px;}
.cta-band{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:40px 48px;
  background:var(--brand-050);
  border:1px solid var(--brand-100);
  border-radius:20px;
}
.cta-band h2{
  font-size:clamp(22px,2.6vw,28px);
  line-height:1.34;
  margin-bottom:8px;
}
.cta-band p{font-size:15px;color:var(--ink-500);}
.cta-actions{display:flex;gap:12px;flex:0 0 auto;}

/* 页脚 */
.site-footer{
  background:var(--brand-800);
  color:rgba(255,255,255,.72);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand .brand-mark{
  background:rgba(255,255,255,.10);
  color:#DCEBF5;
}
.footer-brand .brand-text{color:#fff;}
.footer-brand .brand-text span{color:#8FC7E8;}
.footer-brand p{
  max-width:330px;
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.66);
}
.footer-col h4{
  margin-bottom:16px;
  font-size:15px;
  font-weight:600;
  color:#fff;
}
.footer-col li{
  margin-bottom:10px;
  font-size:14px;
  line-height:1.65;
  color:rgba(255,255,255,.72);
}
.footer-col a{color:rgba(255,255,255,.72);}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:20px 0 28px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;
  color:rgba(255,255,255,.6);
}
.footer-bottom .links{display:flex;gap:20px;}
.footer-bottom a{color:rgba(255,255,255,.6);}
.footer-bottom a:hover{color:#fff;}

/* 响应式 */
@media (max-width:1199px){
  .command-search{width:200px;}
  .main-nav{gap:16px;}
}
@media (max-width:991px){
  .header-inner{height:64px;gap:16px;}
  .main-nav,.command-search,.link-login{display:none;}
  .nav-toggle{display:flex;}
  .section{padding:72px 0;}
  .faq-group{grid-template-columns:120px minmax(0,1fr);gap:28px;padding:36px 0;}
  .support-card{grid-template-columns:1fr;gap:32px;padding:32px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-band{padding:32px;gap:24px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .header-inner{height:60px;}
  .brand-text{font-size:16px;}
  .section{padding:52px 0;}
  .faq-hero{padding:24px 0 40px;}
  .hero-sub{font-size:15px;}
  .faq-group{grid-template-columns:1fr;gap:12px;padding:32px 0;}
  .group-label{margin-top:0;}
  .group-title{font-size:20px;}
  .faq-acc .accordion-button{font-size:15.5px;padding:18px 8px 18px 14px;}
  .faq-acc .accordion-body{font-size:15px;padding:0 14px 20px 14px;}
  .support-band{padding-bottom:56px;}
  .support-card{padding:24px;border-radius:var(--radius-lg);}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 24px;}
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn-brand,.cta-actions .btn-ghost{width:100%;}
  .related{padding-bottom:56px;}
  .cta-band-wrap{padding-bottom:56px;}
  .site-footer{padding-top:48px;}
}
@media (max-width:575px){
  .hero-search{flex-wrap:wrap;padding:10px 12px;}
  .hero-search input{flex:1 1 100%;height:36px;}
  .hero-search .btn-brand{width:100%;height:44px;}
  .form-row{grid-template-columns:1fr;gap:0;}
  .related-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .btn-brand,.btn-ghost{height:44px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .related-card:hover{transform:none;}
}

/* roulang page: category5 */
:root{
  --brand-800:#0C3F63;
  --brand-700:#0F4E7A;
  --brand-600:#14679F;
  --brand-500:#2A87C2;
  --brand-100:#DCEBF5;
  --brand-050:#F0F7FC;
  --mint-600:#1F9E86;
  --sand-600:#D97B2B;
  --ink-900:#0B1B2B;
  --ink-700:#29415A;
  --ink-500:#5D7388;
  --ink-300:#9AAEC0;
  --line:#E3EAF2;
  --bg:#F5F8FB;
  --bg-alt:#EDF3F8;
  --surface:#FFFFFF;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-xs:0 1px 2px rgba(11,27,43,.06);
  --shadow-sm:0 4px 12px rgba(11,27,43,.05);
  --shadow-md:0 10px 30px rgba(11,27,43,.07);
  --shadow-lg:0 20px 48px rgba(11,27,43,.10);

  --bs-body-color:var(--ink-700);
  --bs-body-bg:#FFFFFF;
  --bs-primary:var(--brand-600);
  --bs-border-radius:var(--radius-sm);
  --bs-border-color:var(--line);
  --bs-link-color:var(--brand-600);
  --bs-link-hover-color:var(--brand-800);
  --bs-font-sans-serif:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.78;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease}
a:hover{color:var(--brand-800)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700}
p{margin:0 0 16px}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}

.container{
  max-width:1200px;
  padding-left:24px;
  padding-right:24px;
  margin-left:auto;
  margin-right:auto;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(150%) blur(10px);
  transition:box-shadow .18s ease,background-color .18s ease;
}
.site-header.scrolled{
  box-shadow:var(--shadow-sm);
  background:rgba(255,255,255,.92);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:28px;
  height:68px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
  color:var(--ink-900);
}
.brand:hover{color:var(--ink-900)}
.brand-mark{
  width:28px;height:28px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--brand-100);
  background:var(--brand-050);
  border-radius:9px;
  flex-shrink:0;
}
.brand-text{
  font-size:17px;
  font-weight:700;
  letter-spacing:0;
  color:var(--ink-900);
  white-space:nowrap;
}
.brand-text span{color:var(--brand-600)}
.main-nav{
  display:flex;
  align-items:center;
  gap:26px;
  margin-right:auto;
}
.main-nav a{
  position:relative;
  font-size:14.5px;
  font-weight:500;
  color:var(--ink-700);
  padding:6px 0;
  white-space:nowrap;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:-2px;
  width:0;
  height:2px;
  background:var(--brand-600);
  border-radius:2px;
  transform:translateX(-50%);
  transition:width .18s ease;
}
.main-nav a:hover{color:var(--brand-600)}
.main-nav a:hover::after{width:18px}
.main-nav a.active{color:var(--brand-600);font-weight:600}
.main-nav a.active::after{width:18px}
.drawer-extra{display:none}
.nav-actions{
  display:flex;
  align-items:center;
  gap:16px;
  flex-shrink:0;
}
.nav-search{
  display:flex;
  align-items:center;
  gap:8px;
  width:240px;
  height:40px;
  padding:0 10px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.nav-search:focus-within{
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px var(--brand-100);
}
.nav-search input{
  flex:1;
  min-width:0;
  border:0;
  background:transparent;
  font-size:13.5px;
  color:var(--ink-900);
  outline:none;
}
.nav-search input::placeholder{color:var(--ink-300)}
.nav-search kbd{
  font-size:11px;
  color:var(--ink-500);
  background:var(--bg-alt);
  border-radius:6px;
  padding:2px 6px;
  font-family:inherit;
  line-height:1.4;
}
.nav-login{
  font-size:14px;
  color:var(--ink-700);
  white-space:nowrap;
}
.nav-login:hover{color:var(--brand-600)}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  align-items:center;justify-content:center;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  color:var(--ink-900);
  cursor:pointer;
}
.nav-toggle:active{transform:translateY(1px)}

/* ---------- buttons ---------- */
.btn-brand{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:0 24px;
  background:var(--brand-600);
  color:#fff;
  font-size:15px;
  font-weight:500;
  border:1px solid var(--brand-600);
  border-radius:var(--radius-sm);
  box-shadow:var(--shadow-xs);
  cursor:pointer;
  transition:background-color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn-brand:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff}
.btn-brand:active{transform:translateY(1px)}
.btn-brand.btn-nav{min-height:40px;padding:0 18px;font-size:14px}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:0 22px;
  background:#fff;
  color:var(--ink-900);
  font-size:15px;
  font-weight:500;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  transition:border-color .18s ease,color .18s ease,background-color .18s ease;
}
.btn-ghost:hover{
  border-color:var(--brand-500);
  color:var(--brand-600);
  background:var(--brand-050);
}
.btn-quiet{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14.5px;
  font-weight:500;
  color:var(--brand-600);
}
.btn-quiet::after{content:"→";transition:transform .18s ease}
.btn-quiet:hover{color:var(--brand-800)}
.btn-quiet:hover::after{transform:translateX(3px)}

/* ---------- hero ---------- */
.page-hero{
  position:relative;
  background:
    radial-gradient(680px 320px at 88% 0%, rgba(240,247,252,.95), rgba(240,247,252,0) 70%),
    linear-gradient(180deg,#FFFFFF 0%,#F5F8FB 100%);
  border-bottom:1px solid var(--line);
  padding:56px 0 64px;
  overflow:hidden;
}
.breadcrumb-line{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-500);
  margin-bottom:22px;
}
.breadcrumb-line a{color:var(--ink-500)}
.breadcrumb-line a:hover{color:var(--brand-600)}
.breadcrumb-line .current{color:var(--ink-900)}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--sand-600);
  background:#FDF4EA;
  border:1px solid #F3DEC8;
  border-radius:999px;
  padding:5px 14px;
  margin-bottom:18px;
}
.page-hero h1{
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.16;
  letter-spacing:0;
  max-width:820px;
  margin-bottom:18px;
}
.page-hero .lead{
  font-size:16.5px;
  line-height:1.85;
  color:var(--ink-700);
  max-width:720px;
  margin-bottom:28px;
}
.subscribe-form{
  display:flex;
  gap:12px;
  width:100%;
  max-width:560px;
  flex-wrap:wrap;
}
.subscribe-form input{
  flex:1 1 260px;
  min-width:0;
  height:48px;
  padding:0 16px;
  font-size:15px;
  color:var(--ink-900);
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.subscribe-form input::placeholder{color:var(--ink-300)}
.subscribe-form input:focus{
  outline:none;
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px var(--brand-100);
}
.form-hint{
  font-size:13px;
  color:var(--ink-500);
  margin:12px 0 0;
}
.form-note{
  display:none;
  font-size:13.5px;
  color:var(--mint-600);
  margin:10px 0 0;
}
.form-note.show{display:block}

/* ---------- sections ---------- */
.section{padding:76px 0}
.section.tight{padding:56px 0}
.section.alt{background:var(--bg-alt)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{
  font-size:clamp(24px,3vw,32px);
  line-height:1.28;
  margin-bottom:14px;
}
.section-head p{font-size:16px;color:var(--ink-500);margin:0}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}

/* ---------- fact strip ---------- */
.fact-strip{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);
  padding:32px 8px;
}
.fact-strip .row{gap:0}
.fact-item{
  padding:4px 24px;
  border-left:1px solid var(--line);
}
.fact-item:first-child{border-left:0}
.fact-num{
  display:block;
  font-size:13px;
  font-weight:600;
  color:var(--brand-500);
  letter-spacing:.06em;
  margin-bottom:8px;
}
.fact-item h3{font-size:16.5px;margin-bottom:6px}
.fact-item p{font-size:14.5px;color:var(--ink-500);margin:0;line-height:1.7}

/* ---------- timeline ---------- */
.timeline-wrap{position:relative;max-width:900px}
.year-tag{
  position:sticky;
  top:84px;
  z-index:5;
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--ink-500);
  background:var(--bg-alt);
  border:1px solid var(--line);
  border-radius:999px;
  padding:4px 14px;
  margin-bottom:24px;
}
.timeline{
  position:relative;
  padding-left:38px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:8px;
  top:10px;
  bottom:10px;
  width:1px;
  background:linear-gradient(180deg,var(--brand-100),var(--line));
}
.timeline-item{
  position:relative;
  padding-bottom:40px;
}
.timeline-item:last-child{padding-bottom:0}
.timeline-item::before{
  content:"";
  position:absolute;
  left:-38px;
  top:8px;
  width:15px;
  height:15px;
  border-radius:50%;
  background:var(--brand-600);
  box-shadow:0 0 0 4px var(--brand-050);
}
.timeline-item.is-old::before{
  background:#fff;
  border:1px solid var(--brand-500);
  box-shadow:0 0 0 4px #fff;
}
.version-meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  margin-bottom:10px;
}
.tag-mint{
  display:inline-flex;
  align-items:center;
  font-size:12.5px;
  font-weight:600;
  color:#0E6B58;
  background:#E4F6F1;
  border:1px solid #C9EBE2;
  border-radius:999px;
  padding:3px 12px;
  letter-spacing:.02em;
}
.version-date{
  font-size:13px;
  color:var(--ink-500);
}
.timeline-item h3{
  font-size:20px;
  line-height:1.4;
  font-weight:600;
  margin-bottom:10px;
}
.timeline-item > p{font-size:15.5px;color:var(--ink-700);margin-bottom:12px}
.check-list{margin:0}
.check-list li{
  position:relative;
  padding-left:26px;
  font-size:15px;
  line-height:1.8;
  color:var(--ink-700);
  margin-bottom:8px;
}
.check-list li:last-child{margin-bottom:0}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:9px;
  width:12px;
  height:7px;
  border-left:2px solid var(--brand-600);
  border-bottom:2px solid var(--brand-600);
  transform:rotate(-45deg);
  border-radius:1px;
}
.impact-note{
  margin-top:14px;
  font-size:14px;
  color:var(--ink-500);
  background:var(--brand-050);
  border-left:3px solid var(--brand-500);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  padding:10px 14px;
}

/* ---------- figure block ---------- */
.figure-card{
  margin:0;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  overflow:hidden;
  background:#fff;
  box-shadow:var(--shadow-md);
}
.figure-card img{
  width:100%;
  aspect-ratio:3/2;
  object-fit:cover;
}
.tick-list li{
  position:relative;
  padding-left:28px;
  font-size:15.5px;
  line-height:1.8;
  margin-bottom:12px;
  color:var(--ink-700);
}
.tick-list li:last-child{margin-bottom:0}
.tick-list li::before{
  content:"✓";
  position:absolute;
  left:0;
  top:0;
  color:var(--brand-600);
  font-weight:700;
}

/* ---------- cards ---------- */
.card-soft{
  height:100%;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);
  padding:24px;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card-soft:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-md);
  border-color:var(--brand-100);
}
.card-icon{
  width:40px;height:40px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;
  background:var(--brand-050);
  border:1px solid var(--brand-100);
  color:var(--brand-600);
  margin-bottom:16px;
}
.card-soft h3{font-size:17px;line-height:1.5;font-weight:600;margin-bottom:8px}
.card-soft p{font-size:14.5px;color:var(--ink-500);margin:0;line-height:1.75}

/* ---------- FAQ ---------- */
.faq-accordion{
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  background:#fff;
  box-shadow:var(--shadow-sm);
  padding:8px 24px;
}
.faq-accordion .accordion-item{
  border:0;
  border-bottom:1px solid var(--line);
  background:transparent;
}
.faq-accordion .accordion-item:last-child{border-bottom:0}
.faq-accordion .accordion-header{margin:0}
.faq-accordion .accordion-button{
  background:transparent;
  color:var(--ink-900);
  font-size:16.5px;
  font-weight:600;
  line-height:1.6;
  padding:20px 0 20px 0;
  border-radius:0;
  box-shadow:none !important;
  transition:color .18s ease,padding-left .18s ease,border-color .18s ease;
}
.faq-accordion .accordion-button:not(.collapsed){
  color:var(--brand-700);
  background:transparent;
  padding-left:14px;
  border-left:3px solid var(--brand-600);
  box-shadow:none;
}
.faq-accordion .accordion-button::after{
  content:"+";
  background-image:none;
  width:22px;
  height:22px;
  font-size:20px;
  line-height:1;
  font-weight:400;
  color:var(--brand-600);
  display:flex;
  align-items:center;
  justify-content:center;
  transform:none;
  flex-shrink:0;
}
.faq-accordion .accordion-button:not(.collapsed)::after{
  content:"−";
  transform:none;
  color:var(--brand-700);
}
.faq-accordion .accordion-body{
  font-size:15.5px;
  line-height:1.85;
  color:var(--ink-700);
  padding:0 0 22px 0;
  max-width:72ch;
}

/* ---------- related ---------- */
.related-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:20px;
}
.related-card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:26px 26px 24px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-xs);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.related-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-md);
  border-color:var(--brand-100);
  color:inherit;
}
.related-index{
  font-size:13px;
  font-weight:600;
  color:var(--brand-500);
  letter-spacing:.08em;
}
.related-card h3{
  font-size:18px;
  line-height:1.45;
  font-weight:600;
  color:var(--ink-900);
}
.related-card p{
  font-size:14.5px;
  color:var(--ink-500);
  margin:0;
  line-height:1.7;
}
.related-arrow{
  margin-top:6px;
  font-size:15px;
  color:var(--brand-600);
}
.related-card:hover .related-arrow{color:var(--brand-800)}

/* ---------- CTA band ---------- */
.cta-wrap{padding:0 0 76px}
.cta-band{
  background:linear-gradient(135deg,var(--brand-050) 0%,#E9F2FA 100%);
  border:1px solid var(--brand-100);
  border-radius:20px;
  padding:40px;
}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.cta-band h2{
  font-size:clamp(22px,2.6vw,28px);
  line-height:1.35;
  margin-bottom:10px;
  max-width:560px;
}
.cta-band p{font-size:15px;color:var(--ink-500);margin:0;max-width:560px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{
  background:var(--brand-800);
  color:rgba(255,255,255,.72);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.3fr;
  gap:40px;
  padding-bottom:48px;
}
.site-footer .brand-text{color:#fff}
.site-footer .brand-text span{color:#DCEBF5}
.site-footer .brand-mark{
  background:rgba(255,255,255,.08);
  border-color:rgba(255,255,255,.18);
}
.footer-brand p{
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.72);
  margin:18px 0 0;
  max-width:320px;
}
.footer-col h4{
  color:#fff;
  font-size:15px;
  font-weight:600;
  margin-bottom:16px;
}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a,
.footer-col ul li span{
  font-size:14px;
  color:rgba(255,255,255,.72);
  line-height:1.7;
}
.footer-col ul li a:hover{color:#fff}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0;
  font-size:13px;
  color:rgba(255,255,255,.6);
}
.footer-bottom .links{display:flex;gap:20px;flex-wrap:wrap}
.footer-bottom .links a{color:rgba(255,255,255,.7);font-size:13px}
.footer-bottom .links a:hover{color:#fff}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .nav-search{width:200px}
  .main-nav{gap:20px}
}
@media (max-width:991.98px){
  .nav-inner{height:60px;gap:16px}
  .brand-text{font-size:16px}
  .nav-search,.nav-login{display:none}
  .nav-toggle{display:inline-flex}
  .main-nav{
    position:fixed;
    left:0;right:0;top:60px;
    z-index:1029;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin:0;
    padding:16px 24px 24px;
    background:#fff;
    border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-md);
    max-height:calc(100vh - 60px);
    overflow-y:auto;
    transform:translateY(-10px);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transition:opacity .18s ease,transform .18s ease,visibility .18s ease;
  }
  body.nav-open .main-nav{
    transform:translateY(0);
    opacity:1;
    visibility:visible;
    pointer-events:auto;
  }
  .main-nav a{
    font-size:16px;
    line-height:48px;
    padding:0;
    border-bottom:1px solid var(--line);
  }
  .main-nav a::after{display:none}
  .main-nav a.active{color:var(--brand-600)}
  .drawer-extra{display:block;margin-top:18px}
  .drawer-extra .btn-brand{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:64px 0}
}
@media (max-width:767.98px){
  .container{padding-left:18px;padding-right:18px}
  .page-hero{padding:40px 0 48px}
  .page-hero .lead{font-size:15.5px}
  .section{padding:52px 0}
  .section-head{margin-bottom:28px}
  .fact-item{
    border-left:0;
    border-top:1px solid var(--line);
    padding:18px 20px;
  }
  .fact-item:first-child{border-top:0}
  .fact-strip{padding:8px}
  .related-grid{grid-template-columns:1fr}
  .cta-band{padding:28px 22px;border-radius:16px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn-brand,.cta-actions .btn-ghost{width:100%}
  .timeline{padding-left:28px}
  .timeline-item::before{left:-28px;width:13px;height:13px}
  .timeline::before{left:6px}
  .faq-accordion{padding:4px 16px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .site-footer{padding-top:44px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .subscribe-form .btn-brand{width:100%}
}
@media (max-width:575.98px){
  .container{padding-left:16px;padding-right:16px}
  .year-tag{top:74px}
  .timeline-item h3{font-size:18px}
  .cta-band h2{font-size:21px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  .card-soft:hover,.related-card:hover{transform:none}
}