/* roulang page: index */
:root{
  --brand-900:#0C2740;
  --brand-700:#123A5E;
  --brand-100:#E8EFF6;
  --accent-600:#E8641A;
  --accent-500:#FF7A29;
  --accent-050:#FFF3EA;
  --teal-600:#2E9E8F;
  --bg-page:#FAFAF8;
  --bg-alt:#F2F4F7;
  --surface:#FFFFFF;
  --ink-900:#0F2537;
  --ink-700:#22323F;
  --ink-400:#61707D;
  --line:#E2E7EC;
  --r-card:16px;
  --r-sub:12px;
  --r-btn:10px;
  --r-nav:20px;
  --r-pill:999px;
  --r-img:12px;
  --sh-card:0 1px 2px rgba(15,37,55,.04), 0 8px 24px rgba(18,58,94,.06);
  --sh-hover:0 2px 4px rgba(15,37,55,.06), 0 18px 40px rgba(18,58,94,.10);
  --sp-section:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:15px;
  line-height:1.75;
  color:var(--ink-700);
  background:var(--bg-page);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--brand-700);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--accent-600)}
button,input{font-family:inherit;font-size:inherit}
button{cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

.container{max-width:1200px;margin:0 auto;padding:0 20px;width:100%}
@media (min-width:1024px){.container{padding:0 32px}}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--bg-page);
  padding:12px 0 10px;
  transition:padding .2s ease;
}
.nav-card{
  display:flex;align-items:center;gap:18px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-nav);
  box-shadow:var(--sh-card);
  padding:10px 20px;
  min-height:68px;
  transition:box-shadow .25s ease,min-height .25s ease,padding .25s ease;
}
.site-header.is-scrolled{padding:8px 0}
.site-header.is-scrolled .nav-card{box-shadow:var(--sh-hover);min-height:60px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:11px;
  background:var(--brand-900);
  display:flex;align-items:center;justify-content:center;
  color:#fff;flex-shrink:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-size:15px;font-weight:700;color:var(--ink-900);letter-spacing:.01em}
.brand-sub{font-size:11px;color:var(--ink-400);letter-spacing:.14em}
.nav-items{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-item{
  position:relative;
  display:inline-flex;align-items:center;gap:6px;
  padding:8px 11px;border-radius:var(--r-sub);
  font-size:13.5px;color:var(--ink-700);font-weight:500;
  white-space:nowrap;
}
.nav-item svg{width:17px;height:17px;color:var(--ink-400);transition:color .2s ease}
.nav-item:hover{background:var(--bg-alt);color:var(--brand-700)}
.nav-item:hover svg{color:var(--accent-500)}
.nav-item.active{background:var(--brand-100);color:var(--brand-700);font-weight:600}
.nav-item.active svg{color:var(--brand-700)}
.nav-item.active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:20px;border-radius:2px;background:var(--accent-500);
}
.nav-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);border:1px solid transparent;
  padding:11px 20px;font-size:14px;font-weight:600;line-height:1.2;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
  text-align:center;
}
.btn-primary{background:var(--accent-500);color:#fff}
.btn-primary:hover{background:var(--accent-600);color:#fff}
.btn-primary:active{background:var(--accent-600);transform:translateY(0)}
.btn-primary:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(255,122,41,.35)}
.btn-dark{background:var(--brand-900);color:#fff}
.btn-dark:hover{background:var(--brand-700);color:#fff}
.btn-dark:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(18,58,94,.3)}
.btn-outline{background:#fff;border-color:var(--brand-700);color:var(--brand-700)}
.btn-outline:hover{background:var(--brand-100);color:var(--brand-700)}
.btn-outline:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(18,58,94,.22)}
.btn-ghost-light{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);color:#fff}
.btn-ghost-light:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(255,255,255,.35)}
.btn-sm{padding:9px 16px;font-size:13.5px}
.btn-block{width:100%}
.icon-btn{
  width:42px;height:42px;border-radius:var(--r-btn);
  display:inline-flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);color:var(--ink-700);
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.icon-btn svg{width:19px;height:19px}
.icon-btn:hover{background:var(--bg-alt);color:var(--brand-700);border-color:#d5dce3}
.icon-btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(18,58,94,.22)}
.nav-toggle{display:none}

@media (min-width:1024px){
  .btn-primary:hover,.btn-dark:hover{transform:translateY(-1px)}
}
@media (max-width:1100px){
  .nav-item span{display:none}
  .nav-item{padding:9px 10px}
}
@media (max-width:900px){
  .nav-items{display:none}
  .nav-toggle{display:inline-flex}
  .nav-card{padding:10px 14px;gap:12px}
}
@media (max-width:520px){
  .brand-sub{display:none}
  .nav-actions .btn-dark{display:none}
}

/* 移动抽屉 */
.drawer{
  display:none;
  margin-top:10px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-nav);
  box-shadow:var(--sh-hover);
  padding:12px;
}
.drawer.open{display:block}
.drawer-link{
  display:flex;align-items:center;gap:10px;
  min-height:48px;padding:0 14px;border-radius:var(--r-sub);
  color:var(--ink-700);font-size:14.5px;font-weight:500;
}
.drawer-link svg{width:18px;height:18px;color:var(--ink-400)}
.drawer-link:hover{background:var(--bg-alt);color:var(--brand-700)}
.drawer-link.active{background:var(--brand-100);color:var(--brand-700);font-weight:600}
.drawer-cta{margin-top:10px;padding-top:12px;border-top:1px solid var(--line)}

/* ============ 通用板块 ============ */
.section{padding:var(--sp-section) 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:720px;margin-bottom:40px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--accent-050);color:var(--accent-600);
  border-radius:var(--r-pill);padding:5px 14px;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;margin-bottom:16px;
}
h1{font-size:28px;line-height:1.3;font-weight:700;color:var(--ink-900);letter-spacing:-.01em}
h2{font-size:22px;line-height:1.35;font-weight:700;color:var(--ink-900);letter-spacing:-.01em}
h3{font-size:18px;line-height:1.45;font-weight:600;color:var(--ink-900)}
.lead{font-size:15px;color:var(--ink-400);line-height:1.8;margin-top:12px}
@media (min-width:1024px){
  h1{font-size:40px}
  h2{font-size:28px}
  h3{font-size:20px}
  .lead{font-size:16px}
}
.section-link{color:var(--brand-700);font-weight:600;font-size:14px;text-decoration:underline;text-underline-offset:4px;text-decoration-color:transparent;transition:text-decoration-color .2s ease,color .2s ease}
.section-link:hover{color:var(--accent-600);text-decoration-color:var(--accent-600)}

/* ============ Hero ============ */
.hero{padding:48px 0 72px}
.hero-grid{display:grid;grid-template-columns:1fr;gap:40px;align-items:center}
@media (min-width:1024px){
  .hero{padding:64px 0 96px}
  .hero-grid{grid-template-columns:1.06fr .94fr;gap:56px}
}
.hero h1{margin-bottom:18px}
.hero-sub{font-size:16px;line-height:1.7;color:var(--ink-700);max-width:520px}
@media (min-width:1024px){.hero-sub{font-size:17px}}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
@media (max-width:520px){.hero-actions .btn{width:100%}}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:26px}
.hero-points li{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-400)}
.hero-points svg{width:16px;height:16px;color:var(--teal-600);flex-shrink:0}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-img);border:1px solid var(--line);
  box-shadow:var(--sh-card);
}
.hero-step-chip{
  position:absolute;left:16px;bottom:-22px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-hover);
  padding:14px 18px;display:flex;align-items:center;gap:12px;
  max-width:260px;
}
.hero-step-chip .dot{
  width:34px;height:34px;border-radius:50%;
  background:var(--accent-050);color:var(--accent-600);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;flex-shrink:0;
}
.hero-step-chip b{display:block;font-size:13.5px;color:var(--ink-900)}
.hero-step-chip small{font-size:12px;color:var(--ink-400)}

/* ============ 信任数据条 ============ */
.trust-bar{
  display:grid;grid-template-columns:1fr;gap:0;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-card);
  overflow:hidden;
}
@media (min-width:760px){.trust-bar{grid-template-columns:repeat(3,1fr)}}
.trust-item{padding:26px 24px;border-top:1px solid var(--line)}
.trust-item:first-child{border-top:none}
@media (min-width:760px){
  .trust-item{border-top:none;border-left:1px solid var(--line)}
  .trust-item:first-child{border-left:none}
}
.trust-num{font-size:28px;font-weight:700;color:var(--brand-700);letter-spacing:-.02em;line-height:1.2}
.trust-num em{font-style:normal;font-size:14px;font-weight:600;color:var(--ink-400);margin-left:4px}
.trust-label{font-size:13px;color:var(--ink-400);margin-top:6px}

/* ============ 三步卡 ============ */
.steps{display:grid;grid-template-columns:1fr;gap:22px}
@media (min-width:760px){.steps{grid-template-columns:repeat(3,1fr)}}
.step-card{
  position:relative;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-card);
  padding:26px 24px;
  transition:box-shadow .25s ease,border-color .25s ease,transform .25s ease;
}
.step-card:hover{box-shadow:var(--sh-hover);border-color:#d5dce3}
@media (min-width:1024px){.step-card:hover{transform:translateY(-2px)}}
.step-no{
  width:44px;height:44px;border-radius:50%;
  background:var(--accent-050);color:var(--accent-600);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;margin-bottom:16px;
}
.step-card h3{margin-bottom:10px}
.step-card p{font-size:14px;color:var(--ink-400);line-height:1.8}
.steps-foot{margin-top:32px;display:flex;flex-wrap:wrap;align-items:center;gap:16px}

/* ============ 分类入口卡 ============ */
.cat-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media (min-width:640px){.cat-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.cat-grid{grid-template-columns:repeat(4,1fr)}}
.cat-card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-card);
  overflow:hidden;
  transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.cat-card:hover{box-shadow:var(--sh-hover);border-color:#d5dce3;color:inherit}
@media (min-width:1024px){.cat-card:hover{transform:translateY(-3px)}}
.cat-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.cat-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.cat-card h3{font-size:16.5px}
.cat-card p{font-size:13.5px;color:var(--ink-400);line-height:1.75}
.cat-more{margin-top:auto;font-size:13px;font-weight:600;color:var(--accent-600);display:inline-flex;align-items:center;gap:6px}
.cat-more svg{width:15px;height:15px;transition:transform .2s ease}
.cat-card:hover .cat-more svg{transform:translateX(3px)}

/* ============ 案例证明 ============ */
.case-list{display:grid;gap:36px}
.case-item{display:grid;grid-template-columns:1fr;gap:24px;align-items:center}
@media (min-width:900px){
  .case-item{grid-template-columns:1fr 1fr;gap:44px}
  .case-item.reverse .case-media{order:2}
}
.case-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-img);border:1px solid var(--line);
  box-shadow:var(--sh-card);
}
.case-body h3{margin-bottom:12px}
.case-body p{font-size:14.5px;color:var(--ink-400)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.badge{
  display:inline-flex;align-items:center;
  border-radius:var(--r-pill);
  padding:4px 12px;font-size:12.5px;font-weight:600;
  background:var(--brand-100);color:var(--brand-700);
}
.badge-accent{background:var(--accent-050);color:var(--accent-600)}
.badge-teal{background:rgba(46,158,143,.12);color:var(--teal-600)}
.result-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.result-chip{
  font-size:12.5px;color:var(--ink-700);
  background:var(--bg-alt);border:1px solid var(--line);
  border-radius:var(--r-pill);padding:4px 12px;
}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;background:none;border:none;text-align:left;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;font-size:16px;font-weight:600;color:var(--ink-900);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--brand-700)}
.faq-q:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(18,58,94,.18);border-radius:6px}
.faq-icon{
  width:26px;height:26px;flex-shrink:0;position:relative;
  border-radius:50%;background:var(--bg-alt);
  transition:background-color .2s ease,transform .2s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;
  background:var(--brand-700);border-radius:2px;
  transform:translate(-50%,-50%);
  transition:opacity .2s ease,transform .2s ease;
}
.faq-icon::before{width:12px;height:2px}
.faq-icon::after{width:2px;height:12px}
.faq-item.open .faq-icon{background:var(--accent-050);transform:rotate(180deg)}
.faq-item.open .faq-icon::before{background:var(--accent-600)}
.faq-item.open .faq-icon::after{opacity:0;transform:translate(-50%,-50%) rotate(90deg)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .28s ease;
}
.faq-a p{
  padding:0 4px 24px;font-size:14.5px;color:var(--ink-400);
  max-width:820px;
}

/* ============ CTA 带 ============ */
.cta-band{
  background:var(--brand-900);
  border-radius:var(--r-nav);
  padding:40px 28px;
  display:grid;gap:24px;
  align-items:center;
}
@media (min-width:900px){
  .cta-band{grid-template-columns:1fr auto;padding:48px 48px;gap:40px}
}
.cta-band h2{color:#fff;font-size:22px}
@media (min-width:1024px){.cta-band h2{font-size:26px}}
.cta-band p{color:rgba(255,255,255,.72);font-size:14.5px;margin-top:10px;max-width:600px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media (max-width:520px){.cta-actions .btn{width:100%}}

/* ============ 资讯列表 ============ */
.news-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
.news-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media (min-width:640px){.news-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr)}}
.news-card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-card);
  overflow:hidden;
  transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.news-card:hover{box-shadow:var(--sh-hover);border-color:#d5dce3}
@media (min-width:1024px){.news-card:hover{transform:translateY(-3px)}}
.news-thumb{display:block;overflow:hidden}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s ease}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-meta{display:flex;align-items:center;gap:12px;font-size:12.5px;color:var(--ink-400)}
.news-card h3{font-size:16.5px;line-height:1.5}
.news-card h3 a{color:var(--ink-900)}
.news-card h3 a:hover{color:var(--brand-700)}
.news-card .excerpt{
  font-size:13.5px;color:var(--ink-400);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px solid var(--line);font-size:12.5px;color:var(--ink-400)}
.news-foot a{font-weight:600;color:var(--brand-700)}
.news-foot a:hover{color:var(--accent-600)}
.news-card.featured{grid-column:1/-1}
@media (min-width:900px){
  .news-card.featured{flex-direction:row;align-items:stretch}
  .news-card.featured .news-thumb{flex:0 0 46%;max-width:46%}
  .news-card.featured .news-thumb img{height:100%;aspect-ratio:auto;min-height:260px}
  .news-card.featured .news-body{padding:28px;justify-content:center}
  .news-card.featured h3{font-size:21px}
  .news-card.featured .excerpt{-webkit-line-clamp:3;font-size:14.5px}
}
.empty-state{
  grid-column:1/-1;
  display:flex;flex-direction:column;align-items:center;gap:14px;
  text-align:center;padding:56px 24px;
  background:var(--surface);border:1px dashed var(--line);
  border-radius:var(--r-card);
}
.empty-state svg{width:40px;height:40px;color:var(--ink-400)}
.empty-state p{font-size:14.5px;color:var(--ink-400)}

/* ============ 页脚 ============ */
.site-footer{background:var(--brand-900);color:rgba(255,255,255,.78);margin-top:var(--sp-section)}
.footer-cta{
  display:grid;gap:20px;align-items:center;
  padding:32px 0;border-bottom:1px solid rgba(255,255,255,.14);
}
@media (min-width:900px){.footer-cta{grid-template-columns:1fr auto}}
.footer-cta p{color:#fff;font-size:16px;font-weight:600}
.footer-cta span{display:block;font-size:13.5px;color:rgba(255,255,255,.62);font-weight:400;margin-top:6px}
.footer-main{
  display:grid;grid-template-columns:1fr;gap:34px;
  padding:44px 0 36px;
}
@media (min-width:640px){.footer-main{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-main{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.1)}
.footer-brand b{color:#fff;font-size:15px}
.footer-col p{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.68);max-width:320px}
.footer-col h4{
  color:#fff;font-size:13px;font-weight:600;
  letter-spacing:.08em;margin-bottom:16px;
}
.footer-col li{margin-bottom:11px}
.footer-col li a{color:rgba(255,255,255,.72);font-size:14px}
.footer-col li a:hover{color:var(--accent-500)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);
  padding:22px 0 32px;
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:12.5px;color:rgba(255,255,255,.55);
}

/* 动效可访问性 */
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: article */
:root{
    --brand-900:#0C2740;
    --brand-700:#123A5E;
    --brand-100:#E8EFF6;
    --accent-600:#E8641A;
    --accent-500:#FF7A29;
    --accent-050:#FFF3EA;
    --teal-600:#2E9E8F;
    --bg-page:#FAFAF8;
    --bg-alt:#F2F4F7;
    --surface:#FFFFFF;
    --ink-900:#0F2537;
    --ink-700:#22323F;
    --ink-400:#61707D;
    --line:#E2E7EC;
    --r-card:16px;
    --r-sub:12px;
    --r-btn:10px;
    --r-nav:20px;
    --r-pill:999px;
    --r-img:12px;
    --sh-card:0 1px 2px rgba(15,37,55,.04), 0 8px 24px rgba(18,58,94,.06);
    --sh-hover:0 2px 4px rgba(15,37,55,.06), 0 18px 40px rgba(18,58,94,.10);
    --space-section:88px;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--bg-page);
    color:var(--ink-700);
    font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
    font-size:15px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;height:auto}
  a{color:var(--brand-700);text-decoration:none}
  button,input,textarea,select{font:inherit;color:inherit}
  h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.3;font-weight:600}
  p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  :focus-visible{outline:3px solid rgba(255,122,41,.45);outline-offset:2px;border-radius:6px}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
  @media (min-width:1024px){ .container{padding:0 32px} }

  .tnum{font-variant-numeric:tabular-nums}

  /* ---------- header / nav ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    padding:12px 0;
    background:linear-gradient(180deg,rgba(250,250,248,.97),rgba(250,250,248,.82));
    backdrop-filter:blur(10px);
    transition:padding .22s ease, box-shadow .22s ease;
  }
  .site-header.is-scrolled{padding:7px 0}
  .site-header.is-scrolled .nav-card{box-shadow:var(--sh-hover);height:60px}
  .nav-card{
    display:flex;align-items:center;gap:14px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-nav);
    box-shadow:var(--sh-card);
    padding:0 20px;height:70px;
    transition:height .22s ease, box-shadow .22s ease;
  }
  .brand{display:flex;align-items:center;gap:10px;flex:none}
  .brand-mark{
    width:38px;height:38px;border-radius:11px;
    background:var(--brand-100);color:var(--brand-700);
    display:grid;place-items:center;flex:none;
    border:1px solid #D8E3EE;
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.15}
  .brand-name{font-size:15px;font-weight:700;color:var(--ink-900);letter-spacing:.01em;white-space:nowrap}
  .brand-sub{font-size:11px;color:var(--ink-400);letter-spacing:.18em}

  .nav-items{display:flex;align-items:center;gap:4px;margin-left:6px;flex-wrap:nowrap}
  .nav-item{
    position:relative;display:flex;align-items:center;gap:7px;
    padding:9px 12px;border-radius:12px;
    font-size:13.5px;color:var(--ink-700);white-space:nowrap;
    transition:background .18s ease,color .18s ease;
  }
  .nav-item svg{width:18px;height:18px;color:var(--ink-400);transition:color .18s ease;flex:none}
  .nav-item:hover{background:var(--bg-alt);color:var(--brand-700)}
  .nav-item:hover svg{color:var(--accent-500)}
  .nav-item.active{background:var(--brand-100);color:var(--brand-700);font-weight:600}
  .nav-item.active svg{color:var(--brand-700)}
  .nav-item.active::before{
    content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
    width:3px;height:18px;border-radius:2px;background:var(--accent-500);
  }
  .nav-actions{margin-left:auto;display:flex;align-items:center;gap:10px;flex:none}

  .nav-toggle{
    display:none;width:42px;height:42px;border-radius:12px;
    border:1px solid var(--line);background:#fff;color:var(--brand-700);
    align-items:center;justify-content:center;cursor:pointer;
    transition:background .18s ease,box-shadow .18s ease;
  }
  .nav-toggle:hover{background:var(--bg-alt);box-shadow:var(--sh-card)}
  .nav-toggle:active{transform:translateY(1px)}

  .nav-drawer{
    display:none;margin-top:10px;
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--r-nav);box-shadow:var(--sh-card);
    padding:12px;
  }
  .nav-drawer.is-open{display:block}
  .nav-drawer a{
    display:flex;align-items:center;gap:10px;min-height:48px;
    padding:0 14px;border-radius:12px;font-size:14.5px;color:var(--ink-700);
  }
  .nav-drawer a svg{width:19px;height:19px;color:var(--ink-400)}
  .nav-drawer a:hover{background:var(--bg-alt);color:var(--brand-700)}
  .nav-drawer a.active{background:var(--brand-100);color:var(--brand-700);font-weight:600;box-shadow:inset 3px 0 0 var(--accent-500)}
  .nav-drawer .drawer-cta{margin-top:10px;display:block;width:100%;text-align:center}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 20px;border-radius:var(--r-btn);
    font-size:14.5px;font-weight:600;line-height:1;
    border:1px solid transparent;cursor:pointer;background:none;
    text-decoration:none;white-space:nowrap;
    transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease;
  }
  .btn-primary{background:var(--accent-500);color:#fff;box-shadow:0 6px 16px rgba(232,100,26,.22)}
  .btn-primary:hover{background:var(--accent-600);color:#fff}
  .btn-primary:active{background:var(--accent-600);transform:translateY(0);box-shadow:none}
  .btn-primary[disabled],.btn-primary.is-disabled{background:#F0C7AC;color:#fff;cursor:not-allowed;box-shadow:none}
  .btn-secondary{background:#fff;color:var(--brand-700);border-color:var(--brand-700)}
  .btn-secondary:hover{background:var(--brand-100);color:var(--brand-700)}
  .btn-secondary:active{background:#DBE7F2;transform:translateY(0)}
  .btn-dark{background:var(--brand-700);color:#fff}
  .btn-dark:hover{background:var(--brand-900);color:#fff}
  .btn-dark:active{background:var(--brand-900);transform:translateY(0)}
  .btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
  .btn-outline-light:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff}
  .btn-sm{height:38px;padding:0 16px;font-size:13.5px;border-radius:9px}
  .btn-link{
    display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
    color:var(--brand-700);text-decoration:none;border-bottom:1px solid transparent;
    text-underline-offset:4px;transition:color .18s ease,border-color .18s ease;
  }
  .btn-link:hover{color:var(--accent-600);text-decoration:underline;border-color:transparent}
  .ico-btn{
    width:42px;height:42px;border-radius:12px;display:inline-grid;place-items:center;
    border:1px solid var(--line);background:#fff;color:var(--brand-700);
    transition:background .18s ease,color .18s ease,box-shadow .18s ease;
  }
  .ico-btn:hover{background:var(--bg-alt);color:var(--accent-600);box-shadow:var(--sh-card)}
  @media (min-width:1024px){
    .btn:hover{transform:translateY(-1px)}
  }

  /* ---------- page shell ---------- */
  .page-main{padding:34px 0 var(--space-section)}
  @media (max-width:639px){ .page-main{padding-bottom:56px} }

  .breadcrumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13px;color:var(--ink-400);margin-bottom:22px;
  }
  .breadcrumb a{color:var(--ink-400)}
  .breadcrumb a:hover{color:var(--accent-600)}
  .breadcrumb .sep{color:#B7C2CC}
  .breadcrumb .now{color:var(--ink-700);font-weight:600}

  .card-surface{
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--r-card);box-shadow:var(--sh-card);
  }

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:4px 12px;border-radius:var(--r-pill);
    font-size:12.5px;font-weight:600;letter-spacing:.02em;
    background:var(--brand-100);color:var(--brand-700);
  }
  .badge-accent{background:var(--accent-050);color:var(--accent-600)}
  .badge-safe{background:rgba(46,158,143,.12);color:var(--teal-600)}

  /* ---------- article head ---------- */
  .article-head{padding-bottom:26px;border-bottom:1px solid var(--line);margin-bottom:30px}
  .article-head h1{
    font-size:28px;font-weight:700;color:var(--ink-900);letter-spacing:-.01em;
    margin-bottom:16px;
  }
  @media (min-width:1024px){ .article-head h1{font-size:38px;line-height:1.28} }
  .article-meta{
    display:flex;flex-wrap:wrap;align-items:center;gap:12px;
    font-size:13px;color:var(--ink-400);
  }
  .article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C7D1DA}

  /* ---------- layout ---------- */
  .article-layout{display:grid;grid-template-columns:1fr;gap:32px}
  @media (min-width:1024px){
    .article-layout{grid-template-columns:minmax(0,760px) 300px;gap:48px;justify-content:center}
  }
  .article-main{min-width:0}

  /* ---------- article body ---------- */
  .article-body{
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--r-card);box-shadow:var(--sh-card);
    padding:26px 22px 30px;
    font-size:16px;line-height:1.8;color:var(--ink-700);
    overflow-wrap:break-word;
  }
  @media (min-width:640px){ .article-body{padding:36px 38px 42px} }
  .article-body > * + *{margin-top:1.2em}
  .article-body p{margin:0 0 1.2em;max-width:76ch}
  .article-body h2{
    position:relative;font-size:22px;font-weight:700;color:var(--ink-900);
    margin:40px 0 16px;padding-left:14px;
  }
  .article-body h2::before{
    content:"";position:absolute;left:0;top:.35em;
    width:3px;height:14px;border-radius:2px;background:var(--accent-500);
  }
  .article-body h3{font-size:18px;font-weight:600;color:var(--ink-900);margin:28px 0 12px}
  .article-body a{color:var(--brand-700);text-decoration:underline;text-underline-offset:4px}
  .article-body a:hover{color:var(--accent-600)}
  .article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:0}
  .article-body ul li{position:relative;padding-left:20px;margin-bottom:8px}
  .article-body ul li::before{
    content:"";position:absolute;left:2px;top:.68em;
    width:7px;height:7px;border-radius:2px;background:var(--accent-500);
  }
  .article-body ol{list-style:decimal;padding-left:22px}
  .article-body ol li{margin-bottom:8px}
  .article-body blockquote{
    margin:24px 0;padding:16px 20px;
    border-left:3px solid var(--brand-700);
    background:var(--bg-alt);
    border-radius:0 var(--r-sub) var(--r-sub) 0;
    color:var(--ink-700);
  }
  .article-body blockquote p:last-child{margin-bottom:0}
  .article-body img{border-radius:var(--r-img);border:1px solid var(--line);margin:22px 0 8px}
  .article-body figure{margin:22px 0}
  .article-body figcaption{font-size:13px;color:var(--ink-400);text-align:center;margin-top:8px}
  .article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:14.5px}
  .article-body th,.article-body td{
    padding:12px 10px;text-align:left;border-bottom:1px solid var(--line);
  }
  .article-body th{color:var(--ink-900);font-weight:600;background:var(--bg-alt)}
  .article-body code{
    background:var(--bg-alt);border-radius:6px;padding:2px 6px;font-size:14px;
  }
  .article-body hr{border:none;border-top:1px solid var(--line);margin:32px 0}

  .article-empty{
    text-align:center;padding:56px 24px;
  }
  .article-empty .empty-icon{
    width:56px;height:56px;margin:0 auto 18px;border-radius:16px;
    background:var(--bg-alt);color:var(--ink-400);display:grid;place-items:center;
  }
  .article-empty h2{font-size:20px;margin-bottom:10px}
  .article-empty p{font-size:14.5px;color:var(--ink-400);margin-bottom:22px}

  /* ---------- sidebar ---------- */
  .side-stack{display:grid;gap:18px}
  @media (min-width:1024px){ .side-stack{position:sticky;top:104px} }
  .side-card{padding:20px}
  .side-card h2,.side-card h3{
    font-size:14px;font-weight:700;color:var(--ink-900);
    letter-spacing:.06em;margin-bottom:14px;
  }
  .anchor-list li + li{margin-top:2px}
  .anchor-list a{
    display:block;padding:7px 10px;border-radius:9px;
    font-size:13.5px;color:var(--ink-700);border-left:2px solid transparent;
    transition:background .18s ease,color .18s ease,border-color .18s ease;
  }
  .anchor-list a:hover{background:var(--bg-alt);color:var(--brand-700);border-left-color:var(--accent-500)}
  .entry-list li + li{margin-top:8px}
  .entry-list a{
    display:flex;align-items:center;gap:10px;
    padding:10px 12px;border-radius:var(--r-sub);
    border:1px solid var(--line);background:#fff;
    font-size:13.5px;color:var(--ink-700);
    transition:border-color .18s ease,background .18s ease,box-shadow .18s ease;
  }
  .entry-list a svg{width:17px;height:17px;color:var(--brand-700);flex:none}
  .entry-list a:hover{border-color:#C9D8E6;background:var(--brand-100);box-shadow:var(--sh-card)}
  .side-help{
    background:var(--brand-900);color:#fff;border:1px solid var(--brand-900);
  }
  .side-help h3{color:#fff}
  .side-help p{font-size:13.5px;color:rgba(255,255,255,.78);margin-bottom:16px}
  .side-help .btn{margin-top:4px}

  /* ---------- related ---------- */
  .section-block{margin-top:56px}
  @media (min-width:1024px){ .section-block{margin-top:80px} }
  .section-head{
    display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;
    margin-bottom:26px;
  }
  .section-head h2{font-size:22px;font-weight:700}
  @media (min-width:1024px){ .section-head h2{font-size:28px} }
  .section-head .eyebrow{
    display:block;font-size:12.5px;font-weight:600;letter-spacing:.14em;
    color:var(--accent-600);margin-bottom:8px;
  }

  .related-list{display:grid;gap:18px;grid-template-columns:1fr}
  @media (min-width:640px){ .related-list{grid-template-columns:repeat(2,1fr)} }
  @media (min-width:1024px){ .related-list{grid-template-columns:repeat(3,1fr)} }
  .post-card{
    display:flex;flex-direction:column;overflow:hidden;
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--r-card);box-shadow:var(--sh-card);
    transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
  }
  .post-card:hover{box-shadow:var(--sh-hover);border-color:#D5DFE8}
  @media (min-width:1024px){ .post-card:hover{transform:translateY(-2px)} }
  .post-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg-alt)}
  .post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
  .post-card:hover .thumb img{transform:scale(1.03)}
  .post-card .body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
  .post-card h3{font-size:16.5px;font-weight:600;line-height:1.45}
  .post-card h3 a{color:var(--ink-900)}
  .post-card h3 a:hover{color:var(--brand-700)}
  .post-card .excerpt{
    font-size:14px;color:var(--ink-400);line-height:1.7;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .post-card .foot{
    margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;
    padding-top:12px;border-top:1px solid var(--line);
    font-size:13px;color:var(--ink-400);
  }

  /* ---------- CTA band ---------- */
  .cta-band{
    background:var(--brand-900);border-radius:var(--r-nav);
    padding:36px 26px;color:#fff;
    display:flex;flex-direction:column;gap:22px;
  }
  @media (min-width:768px){
    .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:48px 44px}
  }
  .cta-band h2{color:#fff;font-size:22px;margin-bottom:10px}
  @media (min-width:1024px){ .cta-band h2{font-size:26px} }
  .cta-band p{font-size:14.5px;color:rgba(255,255,255,.76);max-width:56ch}
  .cta-band .cta-actions{display:flex;flex-wrap:wrap;gap:12px}

  .back-row{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:26px}

  /* ---------- footer ---------- */
  .site-footer{background:var(--brand-900);color:#fff;margin-top:var(--space-section);padding:48px 0 26px}
  @media (max-width:639px){ .site-footer{margin-top:56px} }
  .footer-cta{
    display:flex;flex-direction:column;gap:18px;
    padding-bottom:32px;margin-bottom:36px;
    border-bottom:1px solid rgba(255,255,255,.14);
  }
  @media (min-width:768px){
    .footer-cta{flex-direction:row;align-items:center;justify-content:space-between}
  }
  .footer-cta p{font-size:16px;font-weight:600;color:#fff;max-width:64ch}
  .footer-cta p span{display:block;margin-top:6px;font-size:13.5px;font-weight:400;color:rgba(255,255,255,.68)}
  .footer-main{display:grid;grid-template-columns:1fr;gap:30px}
  @media (min-width:640px){ .footer-main{grid-template-columns:repeat(2,1fr)} }
  @media (min-width:1024px){ .footer-main{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px} }
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
  .footer-brand b{font-size:15px;color:#fff;font-weight:700}
  .site-footer .brand-mark{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.16);color:#fff}
  .footer-col p{font-size:13.5px;color:rgba(255,255,255,.66);line-height:1.75;max-width:34ch}
  .footer-col h4{
    font-size:13px;font-weight:600;letter-spacing:.08em;
    color:rgba(255,255,255,.86);margin-bottom:14px;
  }
  .footer-col ul li + li{margin-top:9px}
  .footer-col ul a{font-size:14px;color:rgba(255,255,255,.72);transition:color .18s ease}
  .footer-col ul a:hover{color:var(--accent-500)}
  .footer-bottom{
    margin-top:38px;padding-top:20px;
    border-top:1px solid rgba(255,255,255,.14);
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
    font-size:12.5px;color:rgba(255,255,255,.56);
  }

  @media (max-width:1023px){
    .nav-items{display:none}
    .nav-actions .btn-dark{display:none}
    .nav-toggle{display:inline-flex}
    .nav-card{height:64px}
  }
  @media (max-width:639px){
    .nav-actions .ico-btn{display:none}
    .brand-name{font-size:14px}
    .brand-sub{display:none}
  }

/* roulang page: category1 */
:root{
    --brand-900:#0C2740;
    --brand-700:#123A5E;
    --brand-100:#E8EFF6;
    --accent-600:#E8641A;
    --accent-500:#FF7A29;
    --accent-050:#FFF3EA;
    --teal-600:#2E9E8F;
    --bg-page:#FAFAF8;
    --bg-alt:#F2F4F7;
    --surface:#FFFFFF;
    --ink-900:#0F2537;
    --ink-700:#22323F;
    --ink-400:#61707D;
    --line:#E2E7EC;
    --r-card:16px;
    --r-sub:12px;
    --r-btn:10px;
    --r-nav:20px;
    --r-pill:999px;
    --r-img:12px;
    --sh-card:0 1px 2px rgba(15,37,55,.04), 0 8px 24px rgba(18,58,94,.06);
    --sh-hover:0 2px 4px rgba(15,37,55,.06), 0 18px 40px rgba(18,58,94,.10);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg-page);
    color:var(--ink-700);
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
    font-size:15px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  @media (min-width:1024px){ body{font-size:16px} }
  body h1{font-size:28px;line-height:1.32;font-weight:700;color:var(--ink-900);margin:0}
  @media (min-width:1024px){ body h1{font-size:40px} }
  body h2{font-size:22px;line-height:1.34;font-weight:700;color:var(--ink-900);margin:0}
  @media (min-width:1024px){ body h2{font-size:28px} }
  body h3{font-size:18px;line-height:1.45;font-weight:600;color:var(--ink-900);margin:0}
  @media (min-width:1024px){ body h3{font-size:20px} }
  body h4{margin:0;font-weight:600;color:var(--ink-900)}
  body p{margin:0}
  body a{color:var(--brand-700);text-decoration:none;transition:color .18s ease}
  body a:hover{color:var(--accent-600)}
  body img{max-width:100%;height:auto;display:block}
  body ul,body ol{margin:0;padding:0;list-style:none}
  body button{font:inherit;color:inherit}
  .tnum{font-variant-numeric:tabular-nums}

  /* ============ 容器 ============ */
  .shell{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
  @media (min-width:1024px){ .shell{padding:0 32px} }

  /* ============ 顶部导航 ============ */
  .site-header{position:sticky;top:0;z-index:60;padding:12px 0;transition:padding .2s ease}
  .site-header.scrolled{padding:6px 0}
  .nav-card{
    display:flex;align-items:center;gap:14px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-nav);
    box-shadow:var(--sh-card);
    padding:10px 14px;min-height:64px;
    transition:box-shadow .2s ease,min-height .2s ease;
  }
  @media (min-width:1024px){ .nav-card{padding:10px 20px;gap:18px} }
  .site-header.scrolled .nav-card{box-shadow:var(--sh-hover);min-height:58px}

  .brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink-900)}
  .brand:hover{color:var(--brand-700)}
  .brand-mark{
    display:grid;place-items:center;width:38px;height:38px;flex:0 0 auto;
    border-radius:12px;background:var(--brand-100);color:var(--brand-700);
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.15}
  .brand-name{font-size:15px;font-weight:700;letter-spacing:.01em}
  .brand-sub{font-size:11px;font-weight:500;color:var(--ink-400);letter-spacing:.16em}

  .nav-items{display:none}
  @media (min-width:1024px){
    .nav-items{display:flex;align-items:center;gap:4px;margin-left:auto}
  }
  .nav-item{
    position:relative;display:flex;align-items:center;gap:7px;
    padding:8px 12px;border-radius:var(--r-pill);
    font-size:14px;color:var(--ink-700);white-space:nowrap;
    transition:background-color .18s ease,color .18s ease;
  }
  .nav-item svg{width:18px;height:18px;flex:0 0 auto;color:var(--ink-400);transition:color .18s ease}
  .nav-item:hover{background:var(--bg-alt);color:var(--brand-700)}
  .nav-item:hover svg{color:var(--accent-500)}
  .nav-item.active{background:var(--brand-100);color:var(--brand-700);font-weight:600}
  .nav-item.active svg{color:var(--brand-700)}
  .nav-item.active::before{
    content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
    width:3px;height:18px;border-radius:2px;background:var(--accent-500);
  }

  .nav-actions{display:none}
  @media (min-width:1024px){
    .nav-actions{display:flex;align-items:center;gap:10px;margin-left:4px}
  }
  .icon-btn{
    display:inline-grid;place-items:center;width:42px;height:42px;
    border-radius:12px;border:1px solid var(--line);background:var(--surface);
    color:var(--ink-700);transition:background-color .18s ease,color .18s ease,border-color .18s ease;
  }
  .icon-btn svg{width:20px;height:20px}
  .icon-btn:hover{background:var(--bg-alt);color:var(--accent-600);border-color:#cfd8e0}
  .icon-btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(255,122,41,.35)}

  .nav-toggle{
    display:inline-grid;place-items:center;width:42px;height:42px;margin-left:auto;
    border-radius:12px;border:1px solid var(--line);background:var(--surface);
    color:var(--ink-900);cursor:pointer;transition:background-color .18s ease;
  }
  .nav-toggle:hover{background:var(--bg-alt)}
  .nav-toggle svg{width:20px;height:20px}
  @media (min-width:1024px){ .nav-toggle{display:none} }

  .nav-drawer{
    display:none;margin-top:10px;padding:12px;
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--r-nav);box-shadow:var(--sh-card);
  }
  .nav-drawer.open{display:block}
  @media (min-width:1024px){ .nav-drawer{display:none !important} }
  .nav-drawer a{
    display:flex;align-items:center;gap:10px;min-height:48px;padding:0 12px;
    border-radius:12px;font-size:15px;color:var(--ink-700);
    transition:background-color .18s ease,color .18s ease;
  }
  .nav-drawer a svg{width:18px;height:18px;color:var(--ink-400)}
  .nav-drawer a:hover{background:var(--bg-alt);color:var(--brand-700)}
  .nav-drawer a.active{background:var(--brand-100);color:var(--brand-700);font-weight:600}
  .nav-drawer .drawer-cta{margin-top:10px;width:100%}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 22px;min-height:44px;border:1px solid transparent;
    border-radius:var(--r-btn);font-size:15px;font-weight:600;line-height:1;
    text-align:center;cursor:pointer;user-select:none;
    transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  }
  .btn-sm{padding:9px 16px;min-height:40px;font-size:14px}
  .btn-primary{background:var(--accent-500);border-color:var(--accent-500);color:#fff}
  .btn-primary:hover{background:var(--accent-600);border-color:var(--accent-600);color:#fff}
  .btn-primary:active{background:var(--accent-600);border-color:var(--accent-600);transform:none}
  .btn-dark{background:var(--brand-700);border-color:var(--brand-700);color:#fff}
  .btn-dark:hover{background:var(--brand-900);border-color:var(--brand-900);color:#fff}
  .btn-outline{background:var(--surface);border-color:var(--brand-700);color:var(--brand-700)}
  .btn-outline:hover{background:var(--brand-100);color:var(--brand-700)}
  .btn-outline-light{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
  .btn-outline-light:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff}
  .btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(255,122,41,.35)}
  .btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none}
  @media (min-width:1024px){
    .btn-primary:hover{transform:translateY(-1px)}
    .btn-dark:hover{transform:translateY(-1px)}
    .btn-outline:hover{transform:translateY(-1px)}
  }

  /* ============ 徽章 / 标签 ============ */
  .chip{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 12px;border-radius:var(--r-pill);
    font-size:12.5px;font-weight:600;letter-spacing:.02em;
    background:var(--brand-100);color:var(--brand-700);
  }
  .chip-accent{background:var(--accent-050);color:var(--accent-600)}
  .chip-ok{background:rgba(46,158,143,.12);color:var(--teal-600)}

  /* ============ 板块 ============ */
  .section{padding:56px 0}
  @media (min-width:1024px){ .section{padding:88px 0} }
  .section-alt{background:var(--bg-alt)}
  .section-sm{padding:48px 0}
  @media (min-width:1024px){ .section-sm{padding:64px 0} }
  .sec-head{max-width:740px;margin-bottom:32px}
  @media (min-width:1024px){ .sec-head{margin-bottom:44px} }
  .sec-head h2{margin-top:14px}
  .sec-head p{margin-top:12px;font-size:15px;color:var(--ink-400)}

  /* ============ 首屏 ============ */
  .hero-sec{padding:36px 0 52px}
  @media (min-width:1024px){ .hero-sec{padding:64px 0 88px} }
  .hero-grid{display:grid;gap:36px;align-items:center}
  @media (min-width:1024px){ .hero-grid{grid-template-columns:1.05fr 1fr;gap:56px} }
  .hero-lead{margin-top:18px;font-size:16px;line-height:1.8;color:var(--ink-400);max-width:56ch}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
  @media (max-width:639px){ .hero-actions .btn{width:100%} }
  .hero-points{display:grid;gap:10px;margin-top:28px}
  .hero-points span{display:flex;align-items:flex-start;gap:8px;font-size:14px;color:var(--ink-400)}
  .hero-points svg{width:17px;height:17px;flex:0 0 auto;margin-top:3px;color:var(--teal-600)}
  .hero-visual{position:relative}
  .hero-figure{
    border-radius:var(--r-img);overflow:hidden;
    border:1px solid var(--line);background:var(--surface);box-shadow:var(--sh-card);
  }
  .hero-figure img{width:100%;aspect-ratio:16/11;object-fit:cover}
  .hero-note{
    margin-top:-28px;margin-left:16px;margin-right:16px;position:relative;
    display:flex;align-items:center;gap:12px;
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--r-sub);box-shadow:var(--sh-hover);padding:14px 16px;
  }
  @media (min-width:640px){
    .hero-note{margin:0;position:absolute;right:-12px;bottom:-18px;width:278px}
  }
  .hero-note .mini-num{
    display:grid;place-items:center;width:36px;height:36px;flex:0 0 auto;
    border-radius:50%;background:var(--accent-050);color:var(--accent-600);
    font-weight:700;font-size:14px;
  }
  .hero-note b{display:block;font-size:14px;color:var(--ink-900);line-height:1.4}
  .hero-note small{display:block;font-size:12.5px;color:var(--ink-400);line-height:1.5}

  /* ============ 时间线 ============ */
  .timeline{position:relative}
  .timeline::before{
    content:"";position:absolute;left:19px;top:10px;bottom:10px;width:3px;border-radius:2px;
    background:linear-gradient(180deg,var(--brand-100),#d9e4ee);
  }
  .tl-item{position:relative;padding-left:64px;padding-bottom:24px}
  .tl-item:last-child{padding-bottom:0}
  .tl-num{
    position:absolute;left:0;top:0;display:grid;place-items:center;
    width:41px;height:41px;border-radius:50%;
    background:var(--accent-050);border:1px solid #ffdcc1;
    color:var(--accent-600);font-weight:700;font-size:14px;
    box-shadow:0 0 0 6px var(--bg-page);
  }
  .tl-body{
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--r-sub);padding:18px 20px;
    transition:box-shadow .2s ease,border-color .2s ease;
  }
  .tl-body:hover{box-shadow:var(--sh-card);border-color:#d5dde5}
  .tl-body p{margin-top:8px;font-size:14.5px;color:var(--ink-400)}
  @media (min-width:768px){
    .timeline::before{left:23px}
    .tl-item{padding-left:78px;padding-bottom:28px}
    .tl-num{width:49px;height:49px;font-size:16px}
  }
  @media (min-width:1024px){
    .tl-body{padding:22px 24px}
    .tl-body p{font-size:15px}
  }

  /* ============ 图文交替块 ============ */
  .split{display:grid;gap:24px;align-items:center}
  .split + .split{margin-top:56px}
  @media (min-width:1024px){
    .split{grid-template-columns:1fr 1fr;gap:56px}
    .split + .split{margin-top:80px}
    .split-rev .split-text{order:2}
    .split-rev .split-figure{order:1}
  }
  .split-figure{
    border-radius:var(--r-img);overflow:hidden;
    border:1px solid var(--line);background:var(--surface);box-shadow:var(--sh-card);
  }
  .split-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
  .split-text h3{margin-top:14px}
  .split-text > p{margin-top:14px;font-size:15px;color:var(--ink-400)}

  .point-list{display:grid;gap:10px;margin-top:20px}
  .point-list li{position:relative;padding-left:22px;font-size:15px;color:var(--ink-700)}
  .point-list li::before{
    content:"";position:absolute;left:2px;top:.62em;
    width:7px;height:7px;border-radius:2px;background:var(--accent-500);
  }

  /* ============ FAQ ============ */
  .faq-wrap{max-width:880px}
  .faq{border-top:1px solid var(--line)}
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 2px;background:none;border:0;text-align:left;cursor:pointer;
    font-size:16px;font-weight:600;line-height:1.5;color:var(--ink-900);
    transition:color .18s ease;
  }
  .faq-q:hover{color:var(--brand-700)}
  .faq-q:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(255,122,41,.35);border-radius:6px}
  .faq-ico{position:relative;width:18px;height:18px;flex:0 0 auto}
  .faq-ico::before,.faq-ico::after{
    content:"";position:absolute;left:50%;top:50%;
    background:var(--accent-600);border-radius:2px;
    transform:translate(-50%,-50%);
    transition:transform .2s ease,opacity .2s ease;
  }
  .faq-ico::before{width:14px;height:2px}
  .faq-ico::after{width:2px;height:14px}
  .faq-item.open .faq-ico::after{transform:translate(-50%,-50%) scaleY(0);opacity:0}
  .faq-a{display:none;padding:0 2px 20px;max-width:70ch;font-size:15px;line-height:1.75;color:var(--ink-400)}
  .faq-item.open .faq-a{display:block}

  /* ============ CTA 带 ============ */
  .cta-band{
    display:flex;flex-direction:column;gap:22px;
    background:var(--brand-900);border-radius:var(--r-nav);
    padding:32px 24px;color:#fff;
  }
  @media (min-width:768px){
    .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:48px;gap:32px}
  }
  .cta-band h2{color:#fff;font-size:22px}
  @media (min-width:1024px){ .cta-band h2{font-size:26px} }
  .cta-band p{margin-top:10px;font-size:14.5px;color:rgba(255,255,255,.72);max-width:52ch}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto}
  @media (max-width:639px){ .cta-actions .btn{width:100%} }

  /* ============ 页脚 ============ */
  .site-footer{background:var(--brand-900);color:rgba(255,255,255,.82);margin-top:56px;padding-bottom:28px}
  @media (min-width:1024px){ .site-footer{margin-top:88px} }
  .footer-cta{
    display:flex;flex-direction:column;gap:16px;
    padding:28px 0;border-bottom:1px solid rgba(255,255,255,.14);
  }
  @media (min-width:768px){
    .footer-cta{flex-direction:row;align-items:center;justify-content:space-between;gap:24px}
  }
  .footer-cta p{font-size:16px;font-weight:600;line-height:1.6;color:#fff}
  .footer-cta p span{display:block;margin-top:6px;font-size:13.5px;font-weight:400;color:rgba(255,255,255,.66)}
  .footer-main{display:grid;grid-template-columns:1fr;gap:28px;padding:36px 0 28px}
  @media (min-width:768px){ .footer-main{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px} }
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px;font-size:15px;font-weight:700;color:#fff}
  .footer-brand .brand-mark{background:rgba(255,255,255,.1);color:#fff}
  .footer-col p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.68);max-width:34ch}
  .footer-col h4{margin-bottom:14px;font-size:13px;font-weight:600;letter-spacing:.08em;color:#fff}
  .footer-col ul{display:grid;gap:10px}
  .footer-col ul a{font-size:14px;color:rgba(255,255,255,.72)}
  .footer-col ul a:hover{color:var(--accent-500)}
  .footer-bottom{
    display:flex;flex-direction:column;gap:8px;
    padding-top:20px;border-top:1px solid rgba(255,255,255,.14);
    font-size:13px;color:rgba(255,255,255,.55);
  }
  @media (min-width:768px){
    .footer-bottom{flex-direction:row;align-items:center;justify-content:space-between}
  }

/* roulang page: category2 */
:root{
    --brand-900:#0C2740; --brand-700:#123A5E; --brand-100:#E8EFF6;
    --accent-600:#E8641A; --accent-500:#FF7A29; --accent-050:#FFF3EA;
    --teal-600:#2E9E8F;
    --bg-page:#FAFAF8; --bg-alt:#F2F4F7; --surface:#FFFFFF;
    --ink-900:#0F2537; --ink-700:#22323F; --ink-400:#61707D;
    --line:#E2E7EC;
    --r-card:16px; --r-sub:12px; --r-btn:10px; --r-nav:20px; --r-pill:999px; --r-img:12px;
    --sh-card:0 1px 2px rgba(15,37,55,.04), 0 8px 24px rgba(18,58,94,.06);
    --sh-hover:0 2px 4px rgba(15,37,55,.06), 0 18px 40px rgba(18,58,94,.10);
    --gap-section:88px;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;background:var(--bg-page);color:var(--ink-700);
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
    font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border-radius:var(--r-img);}
  a{color:var(--brand-700);text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease;}
  a:hover{color:var(--accent-600);}
  h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.3;font-weight:700;}
  p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}
  button{font-family:inherit;cursor:pointer;}
  :focus-visible{outline:3px solid rgba(255,122,41,.35);outline-offset:2px;border-radius:6px;}
  .num{font-variant-numeric:tabular-nums;}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
  @media (min-width:1024px){ .container{padding:0 32px;} }

  /* ---------- 导航 ---------- */
  .site-header{position:sticky;top:0;z-index:60;padding:12px 0 0;}
  .nav-card{
    display:flex;align-items:center;gap:16px;
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-nav);
    box-shadow:var(--sh-card);padding:10px 20px;min-height:68px;
    transition:box-shadow .22s ease,min-height .22s ease;
  }
  .nav-card.scrolled{box-shadow:var(--sh-hover);min-height:60px;}
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
  .brand-mark{
    width:38px;height:38px;border-radius:12px;flex-shrink:0;
    background:var(--brand-100);color:var(--brand-700);
    display:flex;align-items:center;justify-content:center;
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.15;}
  .brand-name{font-size:15px;font-weight:700;color:var(--ink-900);letter-spacing:.01em;}
  .brand-sub{font-size:11px;color:var(--ink-400);letter-spacing:.14em;}
  .nav-items{display:none;align-items:center;gap:6px;margin-left:auto;}
  .nav-item{
    display:flex;align-items:center;gap:7px;padding:9px 12px;border-radius:var(--r-sub);
    font-size:14px;color:var(--ink-700);border-left:3px solid transparent;white-space:nowrap;
    min-height:44px;
  }
  .nav-item svg{width:18px;height:18px;color:var(--ink-400);transition:color .18s ease;flex-shrink:0;}
  .nav-item:hover{background:var(--bg-alt);color:var(--ink-900);}
  .nav-item:hover svg{color:var(--accent-500);}
  .nav-item.active{background:var(--brand-100);color:var(--brand-700);border-left-color:var(--accent-500);font-weight:600;}
  .nav-item.active svg{color:var(--brand-700);}
  .nav-actions{display:flex;align-items:center;gap:8px;margin-left:auto;}
  .nav-items + .nav-actions{margin-left:12px;}
  .nav-toggle{
    display:inline-flex;align-items:center;justify-content:center;
    width:42px;height:42px;border-radius:var(--r-sub);border:1px solid var(--line);
    background:var(--surface);color:var(--brand-700);margin-left:auto;
  }
  .nav-toggle:hover{background:var(--bg-alt);}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:var(--r-btn);border:1px solid transparent;
    font-size:15px;font-weight:600;padding:12px 22px;line-height:1.2;
    transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
    text-align:center;cursor:pointer;
  }
  .btn:active{transform:translateY(0);}
  .btn-primary{background:var(--accent-500);color:#fff;}
  .btn-primary:hover{background:var(--accent-600);color:#fff;}
  .btn-ghost{background:var(--surface);color:var(--brand-700);border-color:var(--brand-700);}
  .btn-ghost:hover{background:var(--brand-100);color:var(--brand-700);}
  .btn-dark{background:var(--brand-700);color:#fff;border-color:var(--brand-700);}
  .btn-dark:hover{background:var(--brand-900);color:#fff;}
  .btn-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);}
  .btn-light:hover{background:rgba(255,255,255,.12);color:#fff;}
  .btn-sm{padding:9px 16px;font-size:14px;}
  .btn-block{width:100%;}
  .btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;}
  .icon-btn{
    display:inline-flex;align-items:center;justify-content:center;
    width:42px;height:42px;border-radius:var(--r-sub);
    border:1px solid var(--line);background:var(--surface);color:var(--brand-700);
  }
  .icon-btn:hover{background:var(--brand-100);color:var(--brand-700);border-color:var(--brand-100);}
  .text-link{
    color:var(--brand-700);font-weight:600;font-size:14px;
    text-underline-offset:4px;border-bottom:1px solid transparent;
  }
  .text-link:hover{color:var(--accent-600);text-decoration:underline;text-underline-offset:4px;}

  /* 抽屉 */
  .drawer{
    display:none;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-nav);
    box-shadow:var(--sh-hover);padding:14px;margin-top:10px;
  }
  .drawer.open{display:block;}
  .drawer .nav-item{margin-bottom:6px;justify-content:flex-start;}
  .drawer .btn{margin-top:8px;}

  /* ---------- 通用板块 ---------- */
  .section{padding-top:56px;}
  .section-alt{background:var(--bg-alt);}
  .section-band{padding:56px 0;}
  .section-head{max-width:720px;margin-bottom:28px;}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--accent-600);
    background:var(--accent-050);border-radius:var(--r-pill);padding:5px 14px;margin-bottom:14px;
  }
  h1{font-size:28px;}
  h2.sec-title{font-size:22px;margin-bottom:12px;}
  h3{font-size:18px;}
  .sec-desc{color:var(--ink-400);font-size:15px;}
  @media (min-width:1024px){
    h1{font-size:40px;}
    h2.sec-title{font-size:28px;}
    h3{font-size:20px;}
    .section{padding-top:88px;}
    .section-band{padding:88px 0;}
    .sec-desc{font-size:16px;}
  }

  .card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    box-shadow:var(--sh-card);padding:24px;transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
  }
  .card-hover:hover{box-shadow:var(--sh-hover);border-color:#D6DDE5;}
  @media (min-width:1024px){ .card-hover:hover{transform:translateY(-2px);} }

  .badge{
    display:inline-flex;align-items:center;gap:6px;border-radius:var(--r-pill);
    font-size:12px;font-weight:600;padding:4px 12px;background:var(--brand-100);color:var(--brand-700);
  }
  .badge-teal{background:rgba(46,158,143,.12);color:#1F7A6E;}
  .badge-accent{background:var(--accent-050);color:var(--accent-600);}

  /* ---------- 面包屑 ---------- */
  .crumbs{display:flex;flex-wrap:wrap;gap:6px;font-size:13px;color:var(--ink-400);padding-top:18px;}
  .crumbs a{color:var(--ink-400);}
  .crumbs a:hover{color:var(--accent-600);}
  .crumbs span{color:var(--ink-400);}

  /* ---------- Hero ---------- */
  .hero{padding-top:36px;}
  .hero-inner{display:grid;gap:28px;align-items:center;}
  .hero h1{margin-bottom:16px;}
  .hero h1 .hl{color:var(--brand-700);}
  .hero-lead{font-size:16px;color:var(--ink-400);max-width:640px;margin-bottom:22px;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px;}
  .hero-actions .btn{flex:1 1 100%;}
  .hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:14px;color:var(--ink-400);}
  .hero-points li{display:flex;align-items:center;gap:7px;}
  .hero-points svg{width:16px;height:16px;color:var(--teal-600);flex-shrink:0;}
  .hero-figure{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-card);}
  .hero-figure img{width:100%;height:100%;object-fit:cover;border-radius:0;aspect-ratio:16/10;}
  .hero-tip{
    position:absolute;left:16px;bottom:16px;right:16px;
    background:rgba(255,255,255,.94);border:1px solid var(--line);border-radius:var(--r-sub);
    padding:12px 14px;font-size:13px;color:var(--ink-700);display:flex;gap:10px;align-items:flex-start;
  }
  .hero-tip b{color:var(--ink-900);}
  .hero-tip .dot{width:8px;height:8px;border-radius:50%;background:var(--accent-500);margin-top:7px;flex-shrink:0;}
  @media (min-width:640px){ .hero-actions .btn{flex:0 0 auto;} }
  @media (min-width:1024px){
    .hero{padding-top:56px;}
    .hero-inner{grid-template-columns:minmax(0,1fr) minmax(0,480px);gap:48px;}
    .hero-lead{font-size:16px;}
  }

  /* ---------- 信任条 ---------- */
  .trust{
    display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 12px;
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    box-shadow:var(--sh-card);padding:22px 20px;margin-top:32px;
  }
  .trust-item{padding-left:14px;border-left:1px solid var(--line);}
  .trust-item:first-child{border-left:0;padding-left:0;}
  .trust-num{font-size:26px;font-weight:700;color:var(--ink-900);line-height:1.2;}
  .trust-num small{font-size:14px;font-weight:600;color:var(--ink-400);margin-left:2px;}
  .trust-label{font-size:13px;color:var(--ink-400);margin-top:4px;}
  @media (min-width:768px){
    .trust{grid-template-columns:repeat(4,minmax(0,1fr));padding:26px 28px;gap:12px;}
    .trust-num{font-size:28px;}
  }

  /* ---------- 双栏布局 ---------- */
  .layout{display:grid;gap:28px;}
  @media (min-width:1024px){
    .layout{grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:40px;align-items:start;}
  }
  .main-col{min-width:0;}
  .side-col{min-width:0;display:flex;flex-direction:column;gap:20px;}
  @media (min-width:1024px){ .side-col{position:sticky;top:104px;} }

  /* ---------- FAQ ---------- */
  .faq-group{margin-bottom:38px;}
  .faq-group:last-child{margin-bottom:0;}
  .faq-group-head{display:flex;align-items:center;gap:10px;margin-bottom:6px;}
  .faq-group-head h3{font-size:17px;}
  .faq-group-head .bar{width:3px;height:16px;background:var(--accent-500);border-radius:2px;flex-shrink:0;}
  .faq-group-note{font-size:13px;color:var(--ink-400);margin-bottom:6px;}
  .faq-item{border-top:1px solid var(--line);}
  .faq-item:last-child{border-bottom:1px solid var(--line);}
  .faq-q{
    width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
    background:transparent;border:0;text-align:left;padding:18px 0;
    font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.55;
  }
  .faq-q:hover{color:var(--brand-700);}
  .faq-q .sign{
    flex-shrink:0;width:22px;height:22px;position:relative;margin-top:3px;
    transition:transform .2s ease;color:var(--accent-600);
  }
  .faq-q .sign::before,.faq-q .sign::after{
    content:"";position:absolute;background:currentColor;border-radius:2px;
  }
  .faq-q .sign::before{left:3px;right:3px;top:10px;height:2px;}
  .faq-q .sign::after{top:3px;bottom:3px;left:10px;width:2px;transition:opacity .2s ease;}
  .faq-item.open .faq-q .sign{transform:rotate(180deg);}
  .faq-item.open .faq-q .sign::after{opacity:0;}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;}
  .faq-a-inner{padding:0 0 20px;font-size:15px;color:var(--ink-700);max-width:66ch;}
  .faq-a-inner p + p{margin-top:10px;}
  .faq-a-inner ul{margin-top:10px;display:flex;flex-direction:column;gap:7px;}
  .faq-a-inner li{position:relative;padding-left:16px;font-size:14px;color:var(--ink-400);}
  .faq-a-inner li::before{
    content:"";position:absolute;left:0;top:10px;width:6px;height:6px;
    background:var(--brand-100);border:1px solid var(--brand-700);border-radius:2px;
  }
  .faq-a-inner .inline-tip{
    display:inline-flex;align-items:center;gap:6px;font-size:13px;color:#1F7A6E;
    background:rgba(46,158,143,.10);border-radius:var(--r-pill);padding:3px 10px;margin-top:12px;
  }

  /* ---------- 侧栏卡 ---------- */
  .side-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    box-shadow:var(--sh-card);padding:22px;
  }
  .side-card h3{font-size:16px;margin-bottom:4px;}
  .side-card .side-note{font-size:13px;color:var(--ink-400);margin-bottom:14px;}
  .quick-list{display:flex;flex-direction:column;}
  .quick-list li{border-top:1px solid var(--line);}
  .quick-list li:first-child{border-top:0;}
  .quick-list a{
    display:flex;align-items:center;justify-content:space-between;gap:10px;
    padding:13px 0;font-size:14px;font-weight:600;color:var(--ink-900);
  }
  .quick-list a:hover{color:var(--accent-600);}
  .quick-list a span.arrow{color:var(--ink-400);font-weight:400;transition:transform .18s ease;}
  .quick-list a:hover span.arrow{transform:translateX(3px);color:var(--accent-500);}
  .quick-list em{display:block;font-style:normal;font-size:13px;font-weight:400;color:var(--ink-400);margin-top:2px;}
  .help-card{background:var(--brand-900);border-color:var(--brand-900);color:#E7EEF5;}
  .help-card h3{color:#fff;}
  .help-card p{font-size:14px;color:rgba(255,255,255,.72);margin:8px 0 16px;}
  .help-card .help-meta{display:flex;flex-direction:column;gap:8px;font-size:13px;color:rgba(255,255,255,.72);margin-bottom:18px;}
  .help-card .help-meta b{color:#fff;font-weight:600;}
  .side-figure{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-card);}
  .side-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:0;}
  .side-figure figcaption{background:var(--surface);padding:12px 16px;font-size:13px;color:var(--ink-400);}

  /* ---------- 排查顺序时间线 ---------- */
  .timeline{position:relative;margin-top:8px;}
  .timeline::before{
    content:"";position:absolute;left:19px;top:8px;bottom:8px;width:3px;
    background:var(--line);border-radius:2px;
  }
  .tl-item{position:relative;padding:0 0 26px 58px;}
  .tl-item:last-child{padding-bottom:0;}
  .tl-dot{
    position:absolute;left:0;top:0;width:40px;height:40px;border-radius:50%;
    background:var(--accent-050);color:var(--accent-600);
    display:flex;align-items:center;justify-content:center;
    font-size:14px;font-weight:700;border:1px solid #F6DCC8;
  }
  .tl-item h3{font-size:16px;margin-bottom:6px;}
  .tl-item p{font-size:14px;color:var(--ink-400);max-width:62ch;}
  .tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px;}

  /* ---------- CTA 带 ---------- */
  .cta-band{
    background:var(--brand-900);border-radius:var(--r-nav);
    padding:34px 24px;display:grid;gap:22px;align-items:center;
  }
  .cta-band h2{color:#fff;font-size:22px;margin-bottom:10px;}
  .cta-band p{color:rgba(255,255,255,.72);font-size:15px;max-width:62ch;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
  .cta-actions .btn{flex:1 1 100%;}
  @media (min-width:640px){ .cta-actions .btn{flex:0 0 auto;} }
  @media (min-width:1024px){
    .cta-band{padding:48px;grid-template-columns:minmax(0,1fr) auto;gap:40px;}
    .cta-band h2{font-size:26px;}
  }

  /* ---------- 页脚 ---------- */
  .site-footer{margin-top:56px;background:var(--brand-900);color:rgba(255,255,255,.72);}
  @media (min-width:1024px){ .site-footer{margin-top:88px;} }
  .site-footer .container{padding-top:0;}
  .footer-cta{
    display:grid;gap:18px;align-items:center;padding:32px 0;
    border-bottom:1px solid rgba(255,255,255,.12);
  }
  .footer-cta p{color:#fff;font-size:16px;font-weight:600;line-height:1.6;}
  .footer-cta p span{display:block;font-size:14px;font-weight:400;color:rgba(255,255,255,.66);margin-top:6px;}
  .footer-cta .btn{width:100%;}
  @media (min-width:1024px){
    .footer-cta{grid-template-columns:minmax(0,1fr) auto;gap:40px;padding:36px 0;}
    .footer-cta .btn{width:auto;}
  }
  .footer-main{display:grid;gap:30px;padding:38px 0;}
  .footer-col h4{
    color:#fff;font-size:13px;letter-spacing:.08em;margin-bottom:14px;font-weight:600;
  }
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
  .footer-brand .brand-mark{background:rgba(255,255,255,.10);color:#fff;}
  .footer-brand b{color:#fff;font-size:15px;}
  .footer-col p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:38ch;}
  .footer-col ul{display:flex;flex-direction:column;gap:10px;}
  .footer-col a{color:rgba(255,255,255,.72);font-size:14px;}
  .footer-col a:hover{color:var(--accent-500);}
  .footer-bottom{
    display:flex;flex-direction:column;gap:8px;padding:20px 0 28px;
    border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:rgba(255,255,255,.55);
  }
  @media (min-width:768px){
    .footer-main{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:24px;}
    .footer-bottom{flex-direction:row;justify-content:space-between;align-items:center;}
  }

  @media (min-width:1024px){
    .nav-items{display:flex;}
    .nav-toggle{display:none;}
    .drawer{display:none !important;}
  }

/* roulang page: category4 */
:root {
    --brand-900: #0C2740;
    --brand-700: #123A5E;
    --brand-100: #E8EFF6;
    --accent-600: #E8641A;
    --accent-500: #FF7A29;
    --accent-050: #FFF3EA;
    --teal-600: #2E9E8F;
    --bg-page: #FAFAF8;
    --bg-alt: #F2F4F7;
    --surface: #FFFFFF;
    --ink-900: #0F2537;
    --ink-700: #22323F;
    --ink-400: #61707D;
    --line: #E2E7EC;
    --r-card: 16px;
    --r-sub: 12px;
    --r-btn: 10px;
    --r-nav: 20px;
    --r-pill: 999px;
    --r-img: 12px;
    --sh-card: 0 1px 2px rgba(15, 37, 55, .04), 0 8px 24px rgba(18, 58, 94, .06);
    --sh-hover: 0 2px 4px rgba(15, 37, 55, .06), 0 18px 40px rgba(18, 58, 94, .10);
    --gap-section: 88px;
  }

  * { box-sizing: border-box; }

  html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

  body {
    margin: 0;
    background-color: var(--bg-page);
    color: var(--ink-700);
    font-family: -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", system-ui, sans-serif;
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }

  h1, h2, h3, h4 {
    color: var(--ink-900);
    line-height: 1.3;
    font-weight: 700;
    margin: 0;
  }

  p { margin: 0 0 16px; }
  p:last-child { margin-bottom: 0; }

  a {
    color: var(--brand-700);
    text-decoration: none;
    transition: color .18s ease, background-color .18s ease, border-color .18s ease;
  }
  a:hover { color: var(--accent-600); }

  img { max-width: 100%; display: block; }

  ul, ol { margin: 0 0 16px; padding-left: 0; list-style: none; }

  button, input, select, textarea { font: inherit; color: inherit; }

  :focus-visible {
    outline: 3px solid rgba(255, 122, 41, .35);
    outline-offset: 2px;
    border-radius: 6px;
  }

  .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  .num { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }

  /* ---------- 顶部导航 ---------- */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 80;
    padding: 14px 0;
    background: var(--bg-page);
    border-bottom: 1px solid rgba(226, 231, 236, .7);
  }

  .nav-card {
    display: flex;
    align-items: center;
    gap: 18px;
    height: 68px;
    padding: 0 18px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--r-nav);
    box-shadow: var(--sh-card);
    transition: box-shadow .22s ease, height .22s ease;
  }

  .nav-card.is-scrolled { height: 60px; box-shadow: var(--sh-hover); }

  .brand { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; color: var(--ink-900); }
  .brand:hover { color: var(--ink-900); }

  .brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 12px;
    background: var(--brand-900);
    color: #fff;
    flex: 0 0 auto;
  }

  .brand-text { display: flex; flex-direction: column; line-height: 1.15; }
  .brand-name { font-size: 16px; font-weight: 700; letter-spacing: .01em; }
  .brand-sub { font-size: 11px; color: var(--ink-400); letter-spacing: .12em; }

  .nav-items { display: flex; align-items: center; gap: 4px; margin-left: 6px; flex: 1 1 auto; }

  .nav-item {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 13px;
    border-radius: var(--r-pill);
    font-size: 14px;
    color: var(--ink-700);
    white-space: nowrap;
  }
  .nav-item svg { width: 18px; height: 18px; color: var(--ink-400); transition: color .18s ease; }
  .nav-item:hover { background: var(--bg-alt); color: var(--brand-700); }
  .nav-item:hover svg { color: var(--accent-500); }
  .nav-item.active { background: var(--brand-100); color: var(--brand-700); font-weight: 600; }
  .nav-item.active svg { color: var(--brand-700); }
  .nav-item.active::before {
    content: "";
    position: absolute;
    left: -2px;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    border-radius: 3px;
    background: var(--accent-500);
  }

  .nav-actions { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 44px;
    padding: 0 20px;
    border-radius: var(--r-btn);
    border: 1px solid transparent;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    background: transparent;
    transition: transform .18s ease, background-color .18s ease, color .18s ease, border-color .18s ease, box-shadow .18s ease;
  }
  .btn:focus-visible { outline: 3px solid rgba(255, 122, 41, .35); outline-offset: 2px; }
  .btn[disabled], .btn.is-disabled { opacity: .5; cursor: not-allowed; transform: none; }

  .btn-primary { background: var(--accent-500); color: #fff; border-color: var(--accent-500); }
  .btn-primary:hover { background: var(--accent-600); border-color: var(--accent-600); color: #fff; }
  .btn-primary:active { background: var(--accent-600); transform: translateY(1px); }

  .btn-outline { background: var(--surface); color: var(--brand-700); border-color: var(--brand-700); }
  .btn-outline:hover { background: var(--brand-100); color: var(--brand-700); }

  .btn-dark { background: var(--brand-700); color: #fff; border-color: var(--brand-700); }
  .btn-dark:hover { background: var(--brand-900); border-color: var(--brand-900); color: #fff; }
  .btn-dark:active { transform: translateY(1px); }

  .btn-quiet { background: transparent; color: var(--brand-700); padding: 0 4px; height: auto; border: 0; }
  .btn-quiet:hover { color: var(--accent-600); text-decoration: underline; text-underline-offset: 4px; }

  .btn-sm { height: 38px; padding: 0 16px; font-size: 14px; }

  .icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: var(--r-btn);
    border: 1px solid var(--line);
    background: var(--surface);
    color: var(--ink-700);
    flex: 0 0 auto;
  }
  .icon-btn:hover { border-color: var(--brand-700); color: var(--brand-700); background: var(--brand-100); }
  .icon-btn svg { width: 20px; height: 20px; }

  .nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: var(--r-btn);
    border: 1px solid var(--line);
    background: var(--surface);
    color: var(--ink-700);
  }
  .nav-toggle svg { width: 20px; height: 20px; }

  .nav-drawer {
    display: none;
    margin-top: 10px;
    padding: 12px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--r-nav);
    box-shadow: var(--sh-hover);
  }
  .nav-drawer.open { display: block; }
  .nav-drawer a.drawer-item {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 48px;
    padding: 0 12px;
    border-radius: var(--r-sub);
    color: var(--ink-700);
    font-size: 15px;
  }
  .nav-drawer a.drawer-item:hover { background: var(--bg-alt); }
  .nav-drawer a.drawer-item.active { background: var(--brand-100); color: var(--brand-700); font-weight: 600; }
  .nav-drawer .drawer-cta { display: block; width: 100%; margin-top: 10px; }

  /* ---------- 页面头部 ---------- */
  .page-head {
    position: relative;
    margin-top: 28px;
    padding: 40px;
    background-color: var(--surface);
    background-image: linear-gradient(rgba(255, 255, 255, .94), rgba(255, 255, 255, .97)), url("/assets/images/backpic/back-1.png");
    background-size: cover;
    background-position: center;
    border: 1px solid var(--line);
    border-radius: var(--r-nav);
    box-shadow: var(--sh-card);
    overflow: hidden;
  }

  .page-head::after {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 4px;
    background: var(--accent-500);
  }

  .page-head-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 40px;
    align-items: center;
  }

  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--ink-400);
    margin-bottom: 16px;
    flex-wrap: wrap;
  }
  .breadcrumb a { color: var(--ink-400); }
  .breadcrumb a:hover { color: var(--accent-600); }
  .breadcrumb .sep { color: #C4CDD6; }
  .breadcrumb .current { color: var(--ink-700); }

  .page-head h1 {
    font-size: 34px;
    letter-spacing: -0.01em;
    margin-bottom: 14px;
  }

  .page-head .lead {
    font-size: 16px;
    color: var(--ink-400);
    max-width: 640px;
    margin-bottom: 20px;
  }

  .meta-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
  }

  .chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: var(--r-pill);
    background: var(--bg-alt);
    color: var(--ink-700);
    font-size: 13px;
    line-height: 1;
  }
  .chip-brand { background: var(--brand-100); color: var(--brand-700); font-weight: 600; }
  .chip-accent { background: var(--accent-050); color: var(--accent-600); font-weight: 600; }
  .chip-teal { background: rgba(46, 158, 143, .12); color: var(--teal-600); font-weight: 600; }

  .head-figure {
    border: 1px solid var(--line);
    border-radius: var(--r-img);
    overflow: hidden;
    background: var(--bg-alt);
  }
  .head-figure img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }

  /* ---------- 速览 ---------- */
  .section { padding: var(--gap-section) 0 0; }
  .section-head { margin-bottom: 32px; }
  .section-head h2 { font-size: 26px; margin-bottom: 10px; }
  .section-head p { color: var(--ink-400); max-width: 720px; }

  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .1em;
    color: var(--accent-600);
    text-transform: uppercase;
    margin-bottom: 12px;
  }
  .eyebrow::before {
    content: "";
    width: 22px;
    height: 2px;
    background: var(--accent-500);
    border-radius: 2px;
  }

  .brief-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .brief-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--r-card);
    padding: 24px;
    box-shadow: var(--sh-card);
    transition: box-shadow .22s ease, border-color .22s ease;
  }
  .brief-card:hover { box-shadow: var(--sh-hover); border-color: #CFD9E3; }
  .brief-card h3 { font-size: 17px; margin-bottom: 8px; }
  .brief-card p { font-size: 14px; color: var(--ink-400); margin: 0; }
  .brief-card .brief-idx {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--accent-050);
    color: var(--accent-600);
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 14px;
  }

  /* ---------- 文档布局 ---------- */
  .doc-wrap {
    display: grid;
    grid-template-columns: 262px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .toc {
    position: sticky;
    top: 96px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--r-card);
    box-shadow: var(--sh-card);
    padding: 20px;
  }

  .toc h2 {
    font-size: 13px;
    letter-spacing: .08em;
    color: var(--ink-400);
    font-weight: 600;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line);
  }

  .toc ol { margin: 0; counter-reset: toc; }
  .toc li { counter-increment: toc; }
  .toc a {
    display: flex;
    gap: 10px;
    padding: 8px 8px 8px 6px;
    border-radius: var(--r-sub);
    font-size: 14px;
    color: var(--ink-700);
    line-height: 1.5;
  }
  .toc a::before {
    content: counter(toc, decimal-leading-zero);
    font-size: 12px;
    color: var(--ink-400);
    font-variant-numeric: tabular-nums;
    padding-top: 2px;
  }
  .toc a:hover { background: var(--bg-alt); color: var(--brand-700); }
  .toc a:hover::before { color: var(--accent-600); }
  .toc a.is-current { background: var(--brand-100); color: var(--brand-700); font-weight: 600; }

  .toc-note {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
    font-size: 13px;
    color: var(--ink-400);
    line-height: 1.7;
  }

  .doc-body {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--r-card);
    box-shadow: var(--sh-card);
    padding: 40px;
  }

  .doc-body > .doc-intro {
    padding-bottom: 28px;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--line);
    color: var(--ink-400);
    font-size: 15px;
  }

  .doc-section {
    padding-top: 36px;
    scroll-margin-top: 110px;
  }

  .doc-section h2 {
    position: relative;
    font-size: 21px;
    padding-left: 16px;
    margin-bottom: 18px;
  }
  .doc-section h2::before {
    content: "";
    position: absolute;
    left: 0;
    top: 6px;
    width: 3px;
    height: 18px;
    border-radius: 3px;
    background: var(--accent-500);
  }
  .doc-section h2 .sec-num {
    display: inline-block;
    min-width: 34px;
    color: var(--accent-600);
    font-size: 15px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
  }

  .doc-section h3 {
    font-size: 16px;
    margin: 26px 0 12px;
    color: var(--brand-700);
  }

  .doc-body p { font-size: 15px; line-height: 1.85; }

  .tick-list { margin: 16px 0 0; }
  .tick-list li {
    position: relative;
    padding-left: 22px;
    margin-bottom: 10px;
    font-size: 15px;
    line-height: 1.8;
    color: var(--ink-700);
  }
  .tick-list li::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 11px;
    width: 7px;
    height: 7px;
    border-radius: 2px;
    background: var(--accent-500);
  }
  .tick-list li b { color: var(--ink-900); }

  .def-list {
    display: grid;
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 0;
    margin: 18px 0 0;
    border-top: 1px solid var(--line);
  }
  .def-list dt {
    padding: 14px 16px 14px 0;
    border-bottom: 1px solid var(--line);
    font-size: 14px;
    font-weight: 600;
    color: var(--ink-900);
  }
  .def-list dd {
    margin: 0;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
    font-size: 14px;
    color: var(--ink-400);
    line-height: 1.75;
  }

  .table-wrap { margin-top: 18px; overflow-x: auto; }
  table.rule-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 480px;
    font-size: 14px;
  }
  table.rule-table caption {
    text-align: left;
    font-size: 13px;
    color: var(--ink-400);
    padding-bottom: 10px;
  }
  table.rule-table th {
    text-align: left;
    font-weight: 600;
    color: var(--ink-900);
    padding: 12px 16px 12px 0;
    border-bottom: 1px solid #CFD9E3;
    white-space: nowrap;
  }
  table.rule-table td {
    padding: 14px 16px 14px 0;
    border-bottom: 1px solid var(--line);
    color: var(--ink-700);
    vertical-align: top;
  }
  table.rule-table th:last-child, table.rule-table td:last-child { padding-right: 0; }

  .notice {
    margin: 20px 0 0;
    padding: 16px 20px;
    border-left: 3px solid var(--brand-700);
    background: var(--bg-alt);
    border-radius: 0 var(--r-sub) var(--r-sub) 0;
    font-size: 14px;
    color: var(--ink-700);
  }
  .notice strong { color: var(--ink-900); }

  .doc-foot {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--line);
    display: flex;
    flex-wrap: wrap;
    gap: 12px 24px;
    align-items: center;
    justify-content: space-between;
  }
  .doc-foot .stamp { font-size: 13px; color: var(--ink-400); }

  /* ---------- 轻 CTA ---------- */
  .cta-light {
    margin-top: 56px;
    padding: 36px 40px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--r-nav);
    box-shadow: var(--sh-card);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    flex-wrap: wrap;
  }
  .cta-light h2 { font-size: 20px; margin-bottom: 8px; }
  .cta-light p { color: var(--ink-400); font-size: 14px; margin: 0; max-width: 620px; }
  .cta-light .cta-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }

  /* ---------- 页脚 ---------- */
  .site-footer {
    margin-top: var(--gap-section);
    background: var(--brand-900);
    color: rgba(255, 255, 255, .82);
  }
  .site-footer .container { padding-top: 8px; padding-bottom: 0; }

  .footer-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 30px 0;
    border-bottom: 1px solid rgba(255, 255, 255, .12);
    flex-wrap: wrap;
  }
  .footer-cta p { margin: 0; color: #fff; font-size: 16px; font-weight: 600; }
  .footer-cta p span { display: block; margin-top: 6px; font-size: 13px; font-weight: 400; color: rgba(255, 255, 255, .62); }

  .footer-main {
    display: grid;
    grid-template-columns: 1.7fr 1fr 1fr 1fr;
    gap: 36px;
    padding: 48px 0;
  }

  .footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; color: #fff; }
  .footer-brand .brand-mark { background: rgba(255, 255, 255, .1); }
  .footer-brand b { font-size: 16px; font-weight: 700; }

  .footer-col p { font-size: 14px; line-height: 1.8; color: rgba(255, 255, 255, .66); margin: 0; }

  .footer-col h4 {
    font-size: 13px;
    letter-spacing: .08em;
    color: rgba(255, 255, 255, .58);
    font-weight: 600;
    margin-bottom: 14px;
  }

  .footer-col ul { margin: 0; }
  .footer-col li { margin-bottom: 10px; }
  .footer-col a { font-size: 14px; color: rgba(255, 255, 255, .86); }
  .footer-col a:hover { color: var(--accent-500); }

  .footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 22px 0 28px;
    border-top: 1px solid rgba(255, 255, 255, .12);
    font-size: 13px;
    color: rgba(255, 255, 255, .55);
    flex-wrap: wrap;
  }

  /* ---------- 响应式 ---------- */
  @media (max-width: 1023px) {
    :root { --gap-section: 64px; }
    .nav-items { display: none; }
    .nav-toggle { display: inline-flex; }
    .nav-actions .btn-dark { display: none; }
    .page-head { padding: 32px 28px; }
    .page-head-grid { grid-template-columns: minmax(0, 1fr); gap: 28px; }
    .head-figure { max-width: 420px; }
    .brief-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .doc-wrap { grid-template-columns: minmax(0, 1fr); gap: 24px; }
    .toc { position: static; }
    .toc ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2px 12px; }
    .doc-body { padding: 32px 28px; }
    .footer-main { grid-template-columns: 1fr 1fr; gap: 32px; }
  }

  @media (max-width: 767px) {
    .nav-card { height: 62px; padding: 0 12px; gap: 10px; }
    .brand-name { font-size: 15px; }
    .page-head { padding: 26px 20px; margin-top: 20px; }
    .page-head h1 { font-size: 26px; }
    .page-head .lead { font-size: 15px; }
    .head-figure { display: none; }
    .brief-grid { grid-template-columns: minmax(0, 1fr); }
    .section-head h2 { font-size: 22px; }
    .toc ol { grid-template-columns: minmax(0, 1fr); }
    .doc-body { padding: 24px 20px; }
    .doc-body p { font-size: 15px; }
    .doc-section h2 { font-size: 19px; }
    .def-list { grid-template-columns: minmax(0, 1fr); }
    .def-list dt { padding-bottom: 4px; border-bottom: 0; }
    .def-list dd { padding-top: 4px; }
    .cta-light { padding: 26px 22px; }
    .cta-light .cta-actions { width: 100%; }
    .cta-light .btn { width: 100%; }
    .footer-main { grid-template-columns: minmax(0, 1fr); gap: 28px; padding: 36px 0; }
    .footer-cta .btn { width: 100%; }
  }

  @media (max-width: 520px) {
    .container { padding: 0 16px; }
    .page-head h1 { font-size: 23px; }
    .meta-row { gap: 8px; }
    .chip { font-size: 12px; padding: 5px 10px; }
  }

  @media (min-width: 1024px) {
    .btn:hover { transform: translateY(-1px); }
    .btn:active { transform: translateY(0); }
  }

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

/* roulang page: category3 */
:root{
  --brand-900:#0C2740;
  --brand-700:#123A5E;
  --brand-100:#E8EFF6;
  --accent-600:#E8641A;
  --accent-500:#FF7A29;
  --accent-050:#FFF3EA;
  --teal-600:#2E9E8F;
  --bg-page:#FAFAF8;
  --bg-alt:#F2F4F7;
  --surface:#FFFFFF;
  --ink-900:#0F2537;
  --ink-700:#22323F;
  --ink-400:#61707D;
  --line:#E2E7EC;
  --r-card:16px;
  --r-sub:12px;
  --r-btn:10px;
  --r-nav:20px;
  --r-pill:999px;
  --r-img:12px;
  --sh-card:0 1px 2px rgba(15,37,55,.04), 0 8px 24px rgba(18,58,94,.06);
  --sh-hover:0 2px 4px rgba(15,37,55,.06), 0 18px 40px rgba(18,58,94,.10);
  --sec-y:88px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-page);
  color:var(--ink-700);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:15px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand-700);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--accent-600);}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
svg{flex-shrink:0;}
:focus-visible{outline:3px solid rgba(255,122,41,.45);outline-offset:2px;border-radius:6px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:1024px){
  .container{padding:0 32px;}
  body{font-size:16px;}
}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  padding:12px 0;
  background:rgba(250,250,248,.86);
  backdrop-filter:blur(10px);
  transition:padding .2s ease;
}
.site-header.is-scrolled{padding:8px 0;}
.nav-card{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:66px;
  padding:10px 20px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-nav);
  box-shadow:var(--sh-card);
  transition:box-shadow .22s ease,min-height .22s ease;
  position:relative;
}
.site-header.is-scrolled .nav-card{
  box-shadow:var(--sh-hover);
  min-height:60px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:38px;
  height:38px;
  border-radius:11px;
  background:var(--brand-100);
  color:var(--brand-700);
  display:inline-flex;
  align-items:center;
  justify-content:center;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{
  font-size:15px;
  font-weight:700;
  color:var(--ink-900);
  letter-spacing:.01em;
  white-space:nowrap;
}
.brand-sub{
  font-size:11px;
  color:var(--ink-400);
  letter-spacing:.12em;
}
.nav-items{
  display:flex;
  align-items:center;
  gap:4px;
  flex:1;
  justify-content:center;
  min-width:0;
}
.nav-item{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:9px 12px;
  border-radius:12px;
  font-size:14px;
  font-weight:500;
  color:var(--ink-700);
  white-space:nowrap;
  transition:background .18s ease,color .18s ease;
}
.nav-item svg{width:18px;height:18px;color:var(--ink-400);transition:color .18s ease;}
.nav-item:hover{background:var(--bg-alt);color:var(--brand-700);}
.nav-item:hover svg{color:var(--accent-500);}
.nav-item.active{background:var(--brand-100);color:var(--brand-700);font-weight:600;}
.nav-item.active svg{color:var(--brand-700);}
.nav-item.active::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  transform:translateY(-50%);
  width:3px;
  height:18px;
  border-radius:2px;
  background:var(--accent-500);
}
.nav-actions{
  display:flex;
  align-items:center;
  gap:8px;
  flex-shrink:0;
}
.nav-toggle{
  display:none;
  width:40px;
  height:40px;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  background:var(--surface);
  color:var(--ink-700);
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:background .18s ease,border-color .18s ease;
}
.nav-toggle:hover{background:var(--bg-alt);border-color:var(--brand-700);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:14px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--accent-500);color:#fff;}
.btn-primary:hover{background:var(--accent-600);color:#fff;}
.btn-dark{background:var(--brand-700);color:#fff;}
.btn-dark:hover{background:var(--brand-900);color:#fff;}
.btn-outline{background:var(--surface);border-color:var(--brand-700);color:var(--brand-700);}
.btn-outline:hover{background:var(--brand-100);color:var(--brand-700);}
.btn-light{background:transparent;border-color:rgba(255,255,255,.55);color:#fff;}
.btn-light:hover{background:rgba(255,255,255,.14);color:#fff;}
.btn:active{transform:translateY(0);}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;}
.btn-sm{height:38px;padding:0 16px;font-size:13px;}
.btn-block{width:100%;}
@media (min-width:1024px){
  .btn:hover{transform:translateY(-1px);}
}
.text-link{
  color:var(--brand-700);
  font-weight:600;
  font-size:14px;
  display:inline-flex;
  align-items:center;
  gap:6px;
  border-bottom:1px solid transparent;
  padding-bottom:2px;
}
.text-link:hover{color:var(--accent-600);border-bottom-color:var(--accent-600);}

/* ============ 通用板块 ============ */
.section{padding:56px 0;}
.section-alt{background:var(--bg-alt);}
@media (min-width:1024px){
  .section{padding:var(--sec-y) 0;}
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-400);
  padding:22px 0 0;
}
.breadcrumb a{color:var(--ink-400);}
.breadcrumb a:hover{color:var(--accent-600);}
.breadcrumb span.sep{color:#C4CDD6;}
.breadcrumb .current{color:var(--ink-700);font-weight:600;}

.sec-head{max-width:760px;margin-bottom:36px;}
.sec-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.14em;
  color:var(--accent-600);
  background:var(--accent-050);
  border-radius:var(--r-pill);
  padding:5px 12px;
  margin-bottom:14px;
}
.sec-head h2{
  font-size:22px;
  line-height:1.32;
  font-weight:700;
  color:var(--ink-900);
  letter-spacing:-.01em;
}
@media (min-width:1024px){
  .sec-head h2{font-size:28px;}
}
.sec-head p{
  margin-top:12px;
  font-size:15px;
  color:var(--ink-400);
  line-height:1.8;
}

/* ============ Hero ============ */
.hero{padding:34px 0 12px;}
.hero-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:36px;
  align-items:center;
}
@media (min-width:1024px){
  .hero-grid{grid-template-columns:1.05fr .95fr;gap:56px;}
  .hero{padding:52px 0 16px;}
}
.hero h1{
  font-size:28px;
  line-height:1.32;
  font-weight:700;
  color:var(--ink-900);
  letter-spacing:-.015em;
  margin-top:16px;
}
@media (min-width:1024px){
  .hero h1{font-size:40px;line-height:1.25;}
}
.hero-sub{
  margin-top:16px;
  font-size:16px;
  color:var(--ink-400);
  line-height:1.8;
  max-width:560px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:28px;
}
.hero-points{
  margin-top:28px;
  display:grid;
  gap:10px;
}
.hero-points li{
  display:flex;
  align-items:flex-start;
  gap:9px;
  font-size:14px;
  color:var(--ink-700);
}
.hero-points .dot{
  margin-top:6px;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--accent-500);
  flex-shrink:0;
}
.hero-media{position:relative;}
.hero-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--r-img);
  border:1px solid var(--line);
  box-shadow:var(--sh-card);
}
.hero-float{
  position:absolute;
  left:16px;
  bottom:16px;
  right:16px;
  max-width:290px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-sub);
  box-shadow:var(--sh-hover);
  padding:14px 16px;
}
@media (min-width:640px){
  .hero-float{left:20px;bottom:20px;right:auto;}
}
.hero-float b{
  display:block;
  font-size:13px;
  color:var(--ink-900);
  margin-bottom:6px;
}
.hero-float p{font-size:12.5px;color:var(--ink-400);line-height:1.7;}

/* ============ 数据条 ============ */
.stat-band{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  padding:26px 20px;
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:22px 8px;
}
@media (min-width:900px){
  .stat-band{
    grid-template-columns:repeat(4,1fr);
    padding:30px 32px;
    gap:0;
  }
}
.stat-item{
  text-align:center;
  padding:0 10px;
}
@media (min-width:900px){
  .stat-item + .stat-item{border-left:1px solid var(--line);}
}
.stat-num{
  font-size:24px;
  font-weight:700;
  color:var(--brand-700);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}
@media (min-width:1024px){
  .stat-num{font-size:28px;}
}
.stat-label{
  display:block;
  margin-top:6px;
  font-size:13px;
  color:var(--ink-400);
}

/* ============ 场景卡片 ============ */
.scene-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
}
@media (min-width:900px){
  .scene-grid{grid-template-columns:repeat(3,1fr);gap:24px;}
  .scene-card.feature{grid-column:span 2;}
}
.scene-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  padding:24px;
  display:flex;
  flex-direction:column;
  gap:12px;
  transition:box-shadow .2s ease,border-color .2s ease,transform .2s ease;
}
.scene-card:hover{box-shadow:var(--sh-hover);border-color:#D3DCE5;}
@media (min-width:1024px){
  .scene-card:hover{transform:translateY(-2px);}
}
.scene-icon{
  width:42px;
  height:42px;
  border-radius:12px;
  background:var(--brand-100);
  color:var(--brand-700);
  display:inline-flex;
  align-items:center;
  justify-content:center;
}
.scene-card h3{
  font-size:18px;
  font-weight:600;
  color:var(--ink-900);
  line-height:1.4;
}
.scene-card p{
  font-size:14px;
  color:var(--ink-400);
  line-height:1.78;
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:6px;}
.tag{
  display:inline-flex;
  align-items:center;
  gap:5px;
  font-size:12px;
  font-weight:600;
  padding:4px 10px;
  border-radius:var(--r-pill);
  background:var(--bg-alt);
  color:var(--ink-700);
}
.tag-brand{background:var(--brand-100);color:var(--brand-700);}
.tag-accent{background:var(--accent-050);color:var(--accent-600);}
.tag-safe{background:rgba(46,158,143,.12);color:var(--teal-600);}

/* ============ 案例条目 ============ */
.case-list{display:grid;gap:44px;}
@media (min-width:1024px){
  .case-list{gap:64px;}
}
.case-row{
  display:grid;
  grid-template-columns:1fr;
  gap:24px;
  align-items:center;
}
@media (min-width:900px){
  .case-row{grid-template-columns:1.05fr .95fr;gap:44px;}
  .case-row.reverse .case-media{order:2;}
}
.case-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:var(--r-img);
  border:1px solid var(--line);
  box-shadow:var(--sh-card);
}
.case-body h3{
  font-size:20px;
  font-weight:700;
  color:var(--ink-900);
  line-height:1.4;
  margin-top:14px;
}
.case-body p{
  margin-top:12px;
  font-size:15px;
  color:var(--ink-400);
  line-height:1.8;
}
.case-steps{
  margin-top:16px;
  display:grid;
  gap:8px;
}
.case-steps li{
  display:flex;
  gap:10px;
  font-size:14px;
  color:var(--ink-700);
}
.case-steps .num{
  font-size:12px;
  font-weight:700;
  color:var(--accent-600);
  font-variant-numeric:tabular-nums;
  padding-top:2px;
  min-width:20px;
}

/* ============ 排查路径时间线 ============ */
.timeline{
  position:relative;
  padding-left:28px;
  display:grid;
  gap:26px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:9px;
  top:8px;
  bottom:8px;
  width:3px;
  border-radius:3px;
  background:linear-gradient(180deg,var(--accent-500),var(--brand-100));
}
.tl-item{position:relative;}
.tl-item::before{
  content:"";
  position:absolute;
  left:-28px;
  top:5px;
  width:21px;
  height:21px;
  border-radius:50%;
  background:var(--accent-050);
  border:2px solid var(--accent-500);
}
.tl-item h3{
  font-size:16px;
  font-weight:600;
  color:var(--ink-900);
}
.tl-item p{
  margin-top:6px;
  font-size:14px;
  color:var(--ink-400);
  line-height:1.78;
}
@media (min-width:1024px){
  .timeline{grid-template-columns:repeat(2,1fr);gap:30px 44px;padding-left:32px;}
}

/* ============ FAQ ============ */
.faq{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  background:transparent;
  border:0;
  padding:20px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--ink-900);
  cursor:pointer;
  transition:color .18s ease;
}
.faq-q:hover{color:var(--accent-600);}
.faq-q .sign{
  width:24px;
  height:24px;
  border-radius:50%;
  border:1px solid var(--line);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--brand-700);
  font-size:16px;
  line-height:1;
  flex-shrink:0;
  transition:transform .2s ease,background .2s ease,border-color .2s ease;
}
.faq-item.open .sign{
  transform:rotate(45deg);
  background:var(--accent-050);
  border-color:var(--accent-500);
  color:var(--accent-600);
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .25s ease;
}
.faq-a p{
  padding:0 0 20px;
  font-size:14.5px;
  color:var(--ink-400);
  line-height:1.8;
  max-width:760px;
}

/* ============ CTA ============ */
.cta-band{
  background:var(--brand-900);
  border-radius:var(--r-nav);
  padding:36px 24px;
  color:#fff;
  display:grid;
  gap:22px;
  align-items:center;
}
@media (min-width:900px){
  .cta-band{grid-template-columns:1fr auto;padding:48px;gap:40px;}
}
.cta-band h2{
  font-size:22px;
  font-weight:700;
  line-height:1.35;
  letter-spacing:-.01em;
}
@media (min-width:1024px){
  .cta-band h2{font-size:26px;}
}
.cta-band p{
  margin-top:10px;
  font-size:14.5px;
  color:rgba(255,255,255,.72);
  line-height:1.8;
  max-width:620px;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
@media (max-width:899px){
  .cta-actions .btn{width:100%;}
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--brand-900);
  color:rgba(255,255,255,.78);
  margin-top:56px;
  padding:0 0 28px;
  font-size:14px;
}
@media (min-width:1024px){
  .site-footer{margin-top:88px;padding-bottom:34px;}
}
.footer-cta{
  display:grid;
  gap:16px;
  padding:28px 0;
  border-bottom:1px solid rgba(255,255,255,.12);
}
@media (min-width:900px){
  .footer-cta{grid-template-columns:1fr auto;align-items:center;padding:32px 0;}
}
.footer-cta p{
  font-size:16px;
  font-weight:600;
  color:#fff;
  line-height:1.6;
}
.footer-cta p span{
  display:block;
  margin-top:6px;
  font-size:13px;
  font-weight:400;
  color:rgba(255,255,255,.62);
}
.footer-main{
  display:grid;
  gap:28px;
  padding:34px 0 26px;
  grid-template-columns:1fr;
}
@media (min-width:640px){
  .footer-main{grid-template-columns:repeat(2,1fr);}
}
@media (min-width:1024px){
  .footer-main{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
}
.footer-col h4{
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  color:#fff;
  margin-bottom:14px;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{
  color:rgba(255,255,255,.74);
  font-size:14px;
}
.footer-col a:hover{color:var(--accent-500);}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
}
.footer-brand .brand-mark{
  background:rgba(255,255,255,.1);
  color:#fff;
}
.footer-brand b{
  font-size:15px;
  color:#fff;
  font-weight:700;
}
.footer-col p{
  font-size:13.5px;
  color:rgba(255,255,255,.62);
  line-height:1.8;
  max-width:340px;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding-top:20px;
  display:flex;
  flex-wrap:wrap;
  gap:8px 20px;
  justify-content:space-between;
  font-size:12.5px;
  color:rgba(255,255,255,.5);
}

/* ============ 移动端导航抽屉 ============ */
@media (max-width:1023px){
  .nav-toggle{display:inline-flex;}
  .nav-items{
    position:absolute;
    top:calc(100% + 10px);
    left:0;
    right:0;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    box-shadow:var(--sh-hover);
    padding:10px;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
  }
  .nav-items.open{display:flex;}
  .nav-item{min-height:48px;padding:12px 14px;font-size:14.5px;}
  .nav-actions .btn-dark{display:none;}
}