/* roulang page: index */
:root{
  --brand:#1D6FA5;
  --brand-deep:#16527A;
  --accent:#E8863A;
  --accent-deep:#CF7128;
  --bg:#FFFFFF;
  --bg-soft:#F6F8FB;
  --line:#E4EAF1;
  --line-strong:#D3DCE6;
  --text:#16232E;
  --text-sub:#5A6B7A;
  --text-mute:#8A99A8;
  --radius-s:8px;
  --radius:14px;
  --radius-l:20px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(20,40,60,.05),0 6px 18px rgba(20,40,60,.06);
  --shadow-2:0 2px 4px rgba(20,40,60,.06),0 14px 34px rgba(20,40,60,.10);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:130px}
body{margin:0;font-family:-apple-system,"PingFang SC","HarmonyOS Sans","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
h1,h2,h3,h4{margin:0}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
@media(min-width:768px){.container{padding:0 24px}}
@media(min-width:1024px){.container{padding:0 32px}}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.site-header.is-scrolled{box-shadow:var(--shadow-1)}
.nav-inner{display:flex;align-items:center;gap:18px;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:-.2px;white-space:nowrap;color:var(--text)}
.logo svg{flex:0 0 auto}
.nav-links{display:none;align-items:center;gap:4px;margin-left:6px}
@media(min-width:1024px){.nav-links{display:flex}}
.nav-links a{padding:8px 14px;border-radius:var(--radius-pill);color:var(--text-sub);font-size:15px;transition:background .18s,color .18s}
.nav-links a:hover{color:var(--brand);background:var(--bg-soft)}
.nav-links a.active{color:var(--brand);background:rgba(29,111,165,.09);font-weight:600}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.nav-search{display:none}
@media(min-width:768px){
  .nav-search{display:flex;align-items:center;gap:8px;background:var(--bg-soft);border:1px solid transparent;border-radius:var(--radius-pill);padding:8px 16px;width:200px;transition:background .2s,border-color .2s,box-shadow .2s}
  .nav-search:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(29,111,165,.12)}
  .nav-search input{border:none;background:transparent;outline:none;font-size:14px;width:100%;color:var(--text)}
}
@media(min-width:1280px){.nav-search{width:240px}}
.nav-cta{height:42px;padding:0 20px;font-size:14px}
.burger{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);background:#fff;transition:border-color .2s}
.burger:hover{border-color:var(--brand)}
@media(min-width:1024px){.burger{display:none}}
.mobile-drawer{position:fixed;inset:0;z-index:90;background:#fff;display:flex;flex-direction:column;transform:translateX(102%);visibility:hidden;transition:transform .28s ease,visibility .28s}
.mobile-drawer.open{transform:translateX(0);visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:72px;padding:0 16px;border-bottom:1px solid var(--line)}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;font-size:20px;line-height:1;color:var(--text-sub)}
.drawer-body{padding:12px 16px 32px;overflow-y:auto}
.drawer-body a.drawer-link{display:flex;align-items:center;justify-content:space-between;height:56px;border-bottom:1px solid var(--line);font-size:16px;color:var(--text)}
.drawer-body a.drawer-link.active{color:var(--brand);font-weight:600}
.drawer-search{display:flex;align-items:center;gap:8px;background:var(--bg-soft);border-radius:var(--radius-pill);padding:12px 18px;margin:16px 0 10px}
.drawer-search input{border:none;background:transparent;outline:none;width:100%;font-size:15px}
.drawer-cta{display:flex;width:100%;margin-top:14px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;border:1px solid transparent;font-size:15px;font-weight:600;height:48px;padding:0 24px;transition:background .2s,box-shadow .2s,transform .2s,border-color .2s,color .2s;white-space:nowrap}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);box-shadow:0 10px 22px rgba(29,111,165,.24);transform:translateY(-1px)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-deep);box-shadow:0 10px 22px rgba(232,134,58,.30);transform:translateY(-1px)}
.btn-ghost{background:#fff;border-color:var(--line-strong);color:var(--text)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{height:40px;font-size:14px;padding:0 18px}
.btn-lg{height:52px;font-size:16px;padding:0 30px}
.btn-block{display:flex;width:100%}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:15px;border-bottom:1px solid transparent;transition:border-color .2s}
.text-link:hover{border-color:var(--brand)}

/* ---------- hero ---------- */
.hero{padding:52px 0 60px;background:linear-gradient(180deg,#FFFFFF 0%,var(--bg-soft) 100%);border-bottom:1px solid var(--line)}
@media(min-width:1024px){.hero{padding:76px 0 84px}}
.hero-grid{display:grid;gap:44px;align-items:center}
@media(min-width:1024px){.hero-grid{grid-template-columns:minmax(0,55%) minmax(0,45%);gap:56px}}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand);background:rgba(29,111,165,.08);border-radius:var(--radius-pill);padding:6px 14px;margin-bottom:20px}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--accent);display:inline-block}
h1.hero-title{font-size:28px;line-height:1.28;font-weight:700;letter-spacing:-.4px}
@media(min-width:768px){h1.hero-title{font-size:34px}}
@media(min-width:1024px){h1.hero-title{font-size:40px;line-height:1.2}}
.hero-title em{font-style:normal;color:var(--brand)}
.hero-sub{margin-top:18px;font-size:16px;color:var(--text-sub);max-width:560px}
@media(min-width:1024px){.hero-sub{font-size:17px}}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 24px;margin-top:26px;font-size:14px;color:var(--text-sub)}
.hero-points li{display:flex;align-items:center;gap:8px}
.hero-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);opacity:.65}
.hero-visual{position:relative}
.hero-shot{border-radius:var(--radius-l);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-2);background:var(--bg-soft)}
.hero-shot img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-badge{position:absolute;right:-8px;bottom:-26px;display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-2);padding:12px 16px;max-width:270px}
.hero-badge img{width:52px;height:52px;border-radius:10px;object-fit:cover;flex:0 0 auto}
.hero-badge strong{display:block;font-size:14px;font-weight:600;line-height:1.5}
.hero-badge span{display:block;font-size:12px;color:var(--text-mute);line-height:1.5}
@media(max-width:767px){
  .hero-badge{position:static;margin-top:14px;max-width:none}
}

/* ---------- anchor bar ---------- */
.anchor-bar{position:sticky;top:72px;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.anchor-inner{display:flex;gap:6px;overflow-x:auto;padding:10px 0;scrollbar-width:none;-ms-overflow-style:none}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-inner a{padding:8px 16px;border-radius:var(--radius-pill);font-size:14px;color:var(--text-sub);white-space:nowrap;transition:background .18s,color .18s}
.anchor-inner a:hover{background:var(--bg-soft);color:var(--brand)}

/* ---------- sections ---------- */
.section{padding:64px 0}
@media(min-width:1024px){.section{padding:96px 0}}
.section-soft{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{margin-bottom:36px;max-width:760px}
.sec-head.row{display:flex;flex-direction:column;gap:16px}
@media(min-width:768px){.sec-head.row{flex-direction:row;align-items:flex-end;justify-content:space-between;max-width:none}}
.sec-eyebrow{display:block;font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--brand);text-transform:uppercase;margin-bottom:10px}
h2.sec-title{font-size:23px;font-weight:600;line-height:1.35;letter-spacing:-.3px}
@media(min-width:1024px){h2.sec-title{font-size:30px}}
.sec-desc{margin-top:12px;color:var(--text-sub);font-size:16px;max-width:680px}

/* ---------- selling strips ---------- */
.strip{display:grid;gap:28px;align-items:center;padding:34px 0;border-top:1px solid var(--line)}
.strip:first-child{border-top:none;padding-top:0}
@media(min-width:1024px){
  .strip{grid-template-columns:1fr 1fr;gap:56px;padding:44px 0}
  .strip.reverse .strip-media{order:2}
}
.strip-media{border-radius:var(--radius-l);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-1);background:#fff;transition:box-shadow .25s ease,transform .25s ease}
.strip-media:hover{box-shadow:var(--shadow-2);transform:translateY(-3px)}
.strip-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.strip-num{display:block;font-size:40px;font-weight:700;line-height:1;color:rgba(29,111,165,.16);letter-spacing:-1.5px;margin-bottom:12px}
.strip h3{font-size:20px;font-weight:600;line-height:1.5}
.strip p{margin-top:12px;color:var(--text-sub);font-size:16px}
.strip .strip-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.chip{display:inline-block;font-size:13px;color:var(--text-sub);background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius-pill);padding:4px 12px}

/* ---------- demo ---------- */
.demo-grid{display:grid;gap:36px}
@media(min-width:1024px){.demo-grid{grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:56px;align-items:start}}
.demo-shot{border-radius:var(--radius-l);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-2);background:#fff}
.demo-shot img{width:100%;aspect-ratio:16/11;object-fit:cover}
.demo-caption{font-size:13px;color:var(--text-mute);margin-top:12px;text-align:center}
.demo-step{display:flex;gap:14px;padding:16px 18px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow-1);margin-bottom:12px;transition:border-color .2s,box-shadow .2s,transform .2s}
.demo-step:hover{border-color:rgba(29,111,165,.45);box-shadow:var(--shadow-2);transform:translateY(-2px)}
.demo-step .step-idx{flex:0 0 auto;width:30px;height:30px;border-radius:50%;background:rgba(29,111,165,.1);color:var(--brand);font-size:14px;font-weight:700;display:flex;align-items:center;justify-content:center}
.demo-step strong{display:block;font-size:16px;font-weight:600}
.demo-step span{display:block;font-size:14px;color:var(--text-sub);margin-top:4px;line-height:1.7}
.spec-list{margin-top:28px;border-top:1px solid var(--line)}
.spec-list li{display:flex;justify-content:space-between;gap:20px;padding:13px 0;border-bottom:1px dashed var(--line);font-size:14px}
.spec-list li span{color:var(--text-mute);flex:0 0 auto}
.spec-list li b{font-weight:600;text-align:right}

/* ---------- proof ---------- */
.stat-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
@media(min-width:768px){.stat-row{grid-template-columns:repeat(4,minmax(0,1fr))}}
.stat{background:#fff;padding:26px 18px;text-align:center}
.stat b{display:block;font-size:26px;font-weight:700;color:var(--brand);letter-spacing:-.5px;line-height:1.3}
@media(min-width:1024px){.stat b{font-size:30px}}
.stat b i{font-style:normal;color:var(--accent)}
.stat span{display:block;margin-top:6px;font-size:13px;color:var(--text-mute);line-height:1.6}
.quote-row{display:grid;gap:20px;margin-top:28px}
@media(min-width:1024px){.quote-row{grid-template-columns:minmax(0,1.35fr) minmax(0,1fr)}}
.quote{background:#fff;border:1px solid var(--line);border-left:3px solid var(--brand);border-radius:var(--radius);padding:26px 28px;box-shadow:var(--shadow-1)}
.quote p{color:var(--text-sub);font-size:15px}
.quote footer{margin-top:16px;font-size:13px;color:var(--text-mute)}
.quote footer b{color:var(--text);font-weight:600}

/* ---------- price ---------- */
.price-grid{display:grid;gap:22px}
@media(min-width:768px){.price-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
.plan{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-l);padding:30px 28px;box-shadow:var(--shadow-1);display:flex;flex-direction:column;transition:box-shadow .25s ease,transform .25s ease}
.plan:hover{box-shadow:var(--shadow-2);transform:translateY(-3px)}
.plan.featured{border-color:var(--accent);box-shadow:var(--shadow-2)}
.plan-tag{position:absolute;top:-13px;right:24px;background:var(--accent);color:#fff;font-size:12px;font-weight:600;border-radius:var(--radius-pill);padding:4px 14px}
.plan h3{font-size:19px;font-weight:600}
.plan .plan-note{font-size:14px;color:var(--text-sub);margin-top:8px}
.plan-price{display:flex;align-items:baseline;gap:8px;margin:22px 0 6px}
.plan-price b{font-size:34px;font-weight:700;letter-spacing:-1px;color:var(--brand)}
.plan-price span{font-size:14px;color:var(--text-mute)}
.plan ul{margin:18px 0 26px;border-top:1px solid var(--line);padding-top:18px}
.plan ul li{position:relative;padding-left:22px;font-size:15px;color:var(--text-sub);margin-bottom:10px;line-height:1.7}
.plan ul li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;background:var(--brand);opacity:.75}
.plan .plan-actions{margin-top:auto}
.enterprise-row{margin-top:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);padding:24px 28px;display:flex;flex-direction:column;gap:18px}
@media(min-width:768px){.enterprise-row{flex-direction:row;align-items:center;justify-content:space-between}}
.enterprise-row h3{font-size:17px;font-weight:600}
.enterprise-row p{font-size:14px;color:var(--text-sub);margin-top:6px}

/* ---------- news ---------- */
.news-grid{display:grid;gap:20px}
@media(min-width:1024px){.news-grid{grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:32px}}
.news-feature{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-1);transition:box-shadow .25s ease,transform .25s ease}
.news-feature:hover{box-shadow:var(--shadow-2);transform:translateY(-3px)}
.news-feature img{width:100%;aspect-ratio:16/9;object-fit:cover}
.news-feature .nf-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1}
.news-feature h3{font-size:19px;font-weight:600;line-height:1.55;margin-top:12px}
.news-feature p{margin-top:12px;font-size:14px;color:var(--text-sub);line-height:1.75}
.news-feature .nf-meta{margin-top:auto;padding-top:18px;font-size:13px;color:var(--text-mute)}
.news-item{display:block;padding:16px 0;border-bottom:1px solid var(--line);transition:padding-left .2s}
.news-item:first-child{padding-top:0}
.news-item:last-child{border-bottom:none}
.news-item:hover{padding-left:6px}
.news-item h3{font-size:16px;font-weight:600;line-height:1.6;margin-top:8px;transition:color .2s}
.news-item:hover h3{color:var(--brand)}
.news-item p{font-size:14px;color:var(--text-sub);margin-top:6px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-item .nf-meta{font-size:13px;color:var(--text-mute);margin-top:8px}
.tag{display:inline-block;font-size:12px;line-height:1.6;padding:2px 9px;border-radius:4px;background:rgba(29,111,165,.09);color:var(--brand);font-weight:500}
.empty-state{background:#fff;border:1px dashed var(--line-strong);border-radius:var(--radius);padding:44px 24px;text-align:center}
.empty-state .empty-ico{width:46px;height:46px;border-radius:50%;background:var(--bg-soft);color:var(--text-mute);font-size:22px;display:flex;align-items:center;justify-content:center;margin:0 auto 14px}
.empty-state p{color:var(--text-sub);font-size:15px;margin-bottom:16px}

/* ---------- faq ---------- */
.faq{max-width:800px}
.faq details{border-bottom:1px solid var(--line)}
.faq details:first-of-type{border-top:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:20px;padding:20px 0;font-size:17px;font-weight:600;line-height:1.6}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";flex:0 0 auto;font-size:22px;line-height:1;color:var(--brand);transition:transform .22s ease;margin-top:2px}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .faq-body{padding:0 40px 22px 0;color:var(--text-sub);font-size:15px;line-height:1.85}

/* ---------- cta band ---------- */
.cta-band{background:rgba(29,111,165,.07);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-inner{display:flex;flex-direction:column;gap:22px;padding:52px 0}
@media(min-width:768px){.cta-inner{flex-direction:row;align-items:center;justify-content:space-between;gap:40px;padding:60px 0}}
.cta-inner h2{font-size:22px;font-weight:600;line-height:1.4}
@media(min-width:1024px){.cta-inner h2{font-size:28px}}
.cta-inner p{margin-top:10px;color:var(--text-sub);font-size:15px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-soft);border-top:1px solid var(--line);padding:56px 0 26px}
.footer-grid{display:grid;gap:34px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;margin-bottom:14px}
.footer-about{font-size:14px;color:var(--text-sub);max-width:330px;line-height:1.8}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:14px}
.footer-links a{display:block;color:var(--text-sub);font-size:14px;padding:5px 0;transition:color .18s}
.footer-links a:hover{color:var(--brand)}
.footer-contact li{font-size:14px;color:var(--text-sub);padding:5px 0}
.footer-bottom{margin-top:44px;padding-top:22px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px;font-size:13px;color:var(--text-mute)}
@media(min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between}}

/* ---------- float cta ---------- */
.float-cta{position:fixed;right:26px;bottom:30px;z-index:70;display:inline-flex;align-items:center;gap:8px;height:52px;padding:0 24px;border-radius:var(--radius-pill);background:var(--accent);color:#fff;font-weight:600;font-size:15px;box-shadow:0 12px 28px rgba(232,134,58,.34);opacity:0;visibility:hidden;transform:translateY(14px);transition:opacity .25s ease,transform .25s ease,visibility .25s,background .2s}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:var(--accent-deep);transform:scale(1.03)}
@media(max-width:767px){
  .float-cta{left:0;right:0;bottom:0;height:58px;border-radius:0;justify-content:center;padding-bottom:env(safe-area-inset-bottom);box-shadow:0 -6px 20px rgba(232,134,58,.28)}
  .float-cta:hover{transform:none}
  body{padding-bottom:58px}
}

/* roulang page: article */
:root{
  --brand:#1D6FA5;
  --brand-deep:#16527A;
  --brand-soft:rgba(29,111,165,.08);
  --accent:#E8863A;
  --accent-deep:#D2742A;
  --bg:#FFFFFF;
  --bg-soft:#F6F8FB;
  --line:#E4EAF1;
  --line-strong:#D3DCE6;
  --text:#16232E;
  --text-sub:#5A6B7A;
  --text-mute:#8A99A8;
  --radius-s:8px;
  --radius:14px;
  --radius-l:20px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(20,40,60,.05),0 6px 18px rgba(20,40,60,.06);
  --shadow-2:0 2px 4px rgba(20,40,60,.06),0 14px 34px rgba(20,40,60,.10);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans","Microsoft YaHei",Inter,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease;}
a:hover{color:var(--brand-deep);}
button{font-family:inherit;}
input{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px;}
@media(min-width:768px){.container{padding:0 24px;}}
@media(min-width:1024px){.container{padding:0 32px;}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);}
.header-inner{display:flex;align-items:center;gap:18px;height:68px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{width:34px;height:34px;display:grid;place-items:center;background:var(--brand-soft);border-radius:10px;}
.brand-text{font-size:17px;font-weight:700;color:var(--text);letter-spacing:.2px;}
.brand-text em{font-style:normal;color:var(--brand);}
.nav-links{display:none;}
@media(min-width:1024px){
  .nav-links{display:flex;align-items:center;gap:4px;margin-left:8px;}
  .nav-links a{
    position:relative;padding:8px 12px;border-radius:var(--radius-pill);
    font-size:15px;color:var(--text-sub);
  }
  .nav-links a:hover{color:var(--brand);background:var(--bg-soft);}
  .nav-links a.active{color:var(--brand);font-weight:600;background:var(--brand-soft);}
}
.header-right{margin-left:auto;display:flex;align-items:center;gap:10px;}
.search-box{
  display:none;align-items:center;gap:8px;
  background:var(--bg-soft);border:1px solid transparent;
  border-radius:var(--radius-pill);padding:0 14px;height:40px;width:220px;
  transition:border-color .2s ease,background-color .2s ease;
}
.search-box:focus-within{background:#fff;border-color:var(--brand);}
.search-box input{
  border:0;outline:none;background:transparent;font-size:14px;color:var(--text);width:100%;
}
.search-box input::placeholder{color:var(--text-mute);}
@media(min-width:1024px){.search-box{display:flex;}}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:background-color .2s ease,border-color .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.btn-accent{background:var(--accent);color:#fff;}
.btn-accent:hover{background:var(--accent-deep);color:#fff;box-shadow:0 8px 20px rgba(232,134,58,.28);}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-deep);color:#fff;box-shadow:0 8px 20px rgba(29,111,165,.22);}
.btn-ghost{background:#fff;border-color:var(--line-strong);color:var(--text);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:var(--radius-pill);}
.menu-toggle{
  width:40px;height:40px;display:grid;place-items:center;
  background:#fff;border:1px solid var(--line);border-radius:10px;cursor:pointer;
}
@media(min-width:1024px){.menu-toggle{display:none;}}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:#fff;
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer .drawer-inner{padding:14px 0 20px;}
.mobile-drawer a{
  display:flex;align-items:center;height:56px;font-size:16px;color:var(--text);
  border-bottom:1px solid var(--line);
}
.mobile-drawer a:hover,.mobile-drawer a.active{color:var(--brand);}
.drawer-search{
  display:flex;align-items:center;gap:8px;background:var(--bg-soft);
  border-radius:var(--radius-pill);padding:0 14px;height:44px;margin:14px 0 6px;
}
.drawer-search input{border:0;outline:none;background:transparent;width:100%;font-size:15px;}
.drawer-cta{display:block;margin-top:16px;}
.drawer-cta .btn{width:100%;}

/* ---------- breadcrumb ---------- */
.crumb-bar{background:var(--bg-soft);border-bottom:1px solid var(--line);}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:6px;
  font-size:13px;color:var(--text-sub);padding:12px 0;
}
.breadcrumb a{color:var(--text-sub);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:var(--text-mute);}
.breadcrumb .current{
  color:var(--text);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

/* ---------- article head ---------- */
.article-head{padding:40px 0 26px;border-bottom:1px solid var(--line);}
@media(min-width:768px){.article-head{padding:56px 0 32px;}}
.article-head h1{
  font-size:28px;line-height:1.35;font-weight:700;margin:0 0 16px;color:var(--text);
  max-width:900px;
}
@media(min-width:768px){.article-head h1{font-size:40px;line-height:1.22;}}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;
  font-size:13px;color:var(--text-sub);
}
.article-meta .dot{color:var(--line-strong);}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 9px;border-radius:4px;
  background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:600;
}
.tag-grey{background:#EEF2F6;color:var(--text-sub);}

/* ---------- layout ---------- */
.article-layout{
  display:grid;grid-template-columns:1fr;gap:40px;
  padding:36px 0 8px;
}
@media(min-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr) 280px;gap:48px;padding:48px 0 16px;}
}
.article-main{max-width:760px;width:100%;margin:0 auto;}
@media(min-width:1024px){.article-main{margin:0;}}

/* ---------- article body ---------- */
.article-body{font-size:17px;line-height:1.85;color:var(--text);}
.article-body p{margin:0 0 1em;}
.article-body h2{
  font-size:23px;line-height:1.4;font-weight:600;color:var(--text);
  margin:1.9em 0 .7em;padding-left:14px;border-left:4px solid var(--brand);
}
.article-body h3{font-size:19px;line-height:1.5;font-weight:600;margin:1.6em 0 .6em;color:var(--text);}
.article-body h4{font-size:17px;font-weight:600;margin:1.4em 0 .5em;}
.article-body ul,.article-body ol{margin:0 0 1em;padding-left:1.4em;}
.article-body li{margin:.4em 0;}
.article-body ul li::marker{color:var(--brand);}
.article-body blockquote{
  margin:1.4em 0;padding:16px 20px;background:var(--bg-soft);
  border-left:3px solid var(--brand);border-radius:0 var(--radius-s) var(--radius-s) 0;
  color:var(--text-sub);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:10px;margin:1.4em auto;}
.article-body figure{margin:1.4em 0;}
.article-body figcaption{text-align:center;font-size:13px;color:var(--text-mute);margin-top:8px;}
.article-body table{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;}
.article-body th{background:var(--bg-soft);font-weight:600;}
.article-body tbody tr:nth-child(even){background:#FAFCFE;}
.article-body pre{
  background:#F4F7FA;border:1px solid var(--line);border-radius:var(--radius-s);
  padding:14px 16px;overflow:auto;font-size:14px;line-height:1.7;margin:1.2em 0;
}
.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em;}
.article-body a{border-bottom:1px solid rgba(29,111,165,.35);}
.article-body a:hover{border-bottom-color:var(--brand);}

/* ---------- inline cta ---------- */
.inline-cta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  background:var(--brand-soft);border:1px solid rgba(29,111,165,.16);
  border-radius:var(--radius);padding:20px 22px;margin:28px 0;
}
.inline-cta .ic-text{flex:1 1 260px;}
.inline-cta strong{display:block;font-size:16px;color:var(--text);margin-bottom:4px;}
.inline-cta span{font-size:14px;color:var(--text-sub);}

/* ---------- article footer ---------- */
.article-foot{margin-top:36px;padding-top:24px;border-top:1px solid var(--line);}
.foot-label{font-size:13px;color:var(--text-mute);margin:0 0 10px;}
.foot-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px;}
.related-title{font-size:20px;font-weight:600;margin:0 0 16px;}
.related-list{display:grid;grid-template-columns:1fr;gap:14px;}
@media(min-width:640px){.related-list{grid-template-columns:1fr;}}
.rel-card{
  display:flex;gap:14px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:12px;box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--line-strong);}
.rel-card img{width:96px;height:70px;object-fit:cover;border-radius:10px;flex-shrink:0;}
.rel-card .rel-text{min-width:0;}
.rel-card h3{font-size:16px;font-weight:600;margin:0 0 6px;color:var(--text);line-height:1.5;}
.rel-card p{margin:0;font-size:13px;color:var(--text-sub);line-height:1.7;}
.back-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}

/* ---------- sidebar ---------- */
.article-side{display:none;}
@media(min-width:1024px){
  .article-side{display:block;border-left:1px solid var(--line);padding-left:28px;}
}
.side-sticky{position:sticky;top:92px;}
.side-title{font-size:15px;font-weight:600;margin:0 0 14px;color:var(--text);}
.side-list{list-style:none;margin:0;padding:0;}
.side-list li{padding:12px 0;border-bottom:1px solid var(--line);}
.side-list li:last-child{border-bottom:0;}
.side-list a{font-size:14px;color:var(--text-sub);display:block;line-height:1.7;}
.side-list a:hover{color:var(--brand);}
.side-card{
  margin-top:22px;background:var(--bg-soft);border:1px solid var(--line);
  border-radius:var(--radius);padding:18px;
}
.side-card strong{display:block;font-size:15px;margin-bottom:6px;}
.side-card p{font-size:13px;color:var(--text-sub);margin:0 0 14px;line-height:1.75;}
.side-card .btn{width:100%;height:42px;font-size:14px;}

/* ---------- not found ---------- */
.empty-box{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius-l);
  padding:48px 24px;text-align:center;
}
.empty-box .empty-icon{
  width:56px;height:56px;margin:0 auto 16px;border-radius:16px;
  background:#fff;border:1px solid var(--line);display:grid;place-items:center;
}
.empty-box h2{font-size:20px;margin:0 0 10px;}
.empty-box p{color:var(--text-sub);font-size:15px;margin:0 0 22px;}

/* ---------- cta band ---------- */
.cta-band-wrap{padding:64px 0;background:var(--bg-soft);border-top:1px solid var(--line);}
@media(min-width:768px){.cta-band-wrap{padding:88px 0;}}
.cta-band{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-l);
  box-shadow:var(--shadow-1);padding:32px 26px;
  display:flex;flex-wrap:wrap;align-items:center;gap:22px;
}
@media(min-width:768px){.cta-band{padding:40px 44px;}}
.cta-band .cta-text{flex:1 1 320px;}
.cta-band h2{font-size:22px;font-weight:600;margin:0 0 8px;}
@media(min-width:768px){.cta-band h2{font-size:26px;}}
.cta-band p{margin:0;color:var(--text-sub);font-size:15px;}
.cta-band .cta-actions{display:flex;flex-wrap:wrap;gap:12px;width:100%;}
@media(min-width:768px){.cta-band .cta-actions{width:auto;}}
@media(max-width:520px){.cta-band .cta-actions .btn{width:100%;}}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-soft);border-top:1px solid var(--line);padding:56px 0 24px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px;}
@media(min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px;}}
.footer-brand .brand{margin-bottom:14px;}
.footer-brand p{font-size:14px;color:var(--text-sub);margin:0 0 14px;line-height:1.8;max-width:34ch;}
.footer-quote{
  border-left:3px solid var(--brand);padding:6px 0 6px 12px;
  font-size:13px;color:var(--text-sub);
}
.footer-quote b{color:var(--text);}
.footer-col h3{font-size:15px;font-weight:600;margin:0 0 14px;color:var(--text);}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--text-sub);}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  margin-top:36px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--text-mute);
}

/* ---------- float cta ---------- */
.float-cta{
  position:fixed;right:24px;bottom:28px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;
  height:52px;padding:0 22px;border-radius:var(--radius-pill);
  background:var(--accent);color:#fff;font-size:15px;font-weight:600;
  box-shadow:0 10px 26px rgba(232,134,58,.32);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s ease,background-color .2s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:var(--accent-deep);color:#fff;transform:scale(1.03);}
@media(max-width:640px){
  .float-cta{
    left:16px;right:16px;bottom:0;border-radius:0;justify-content:center;
    height:56px;padding-bottom:env(safe-area-inset-bottom);
  }
  .float-cta:hover{transform:none;}
}

/* roulang page: category1 */
:root{
  --brand:#1D6FA5;
  --brand-deep:#16527A;
  --accent:#E8863A;
  --accent-deep:#CE6F26;
  --bg:#FFFFFF;
  --bg-soft:#F6F8FB;
  --line:#E4EAF1;
  --line-strong:#D3DCE6;
  --text:#16232E;
  --text-sub:#5A6B7A;
  --text-mute:#8A99A8;
  --radius-s:8px;
  --radius:14px;
  --radius-l:20px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(20,40,60,.05),0 6px 18px rgba(20,40,60,.06);
  --shadow-2:0 2px 4px rgba(20,40,60,.06),0 14px 34px rgba(20,40,60,.10);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body.page-body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit;font-size:inherit;color:inherit}
ul{margin:0;padding:0;list-style:none}
p{margin:0 0 1em}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px}
@media (min-width:768px){.container{padding-left:24px;padding-right:24px}}
@media (min-width:1024px){.container{padding-left:32px;padding-right:32px}}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(180%) blur(6px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-1)}
.header-inner{display:flex;align-items:center;gap:16px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:34px;height:34px;flex-shrink:0}
.brand-text{font-size:18px;font-weight:700;letter-spacing:.2px;color:var(--text);white-space:nowrap}
.brand-text span{color:var(--brand)}
.nav-links{display:none;align-items:center;gap:4px;margin-left:8px}
.nav-links a{
  display:inline-block;padding:8px 14px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:500;color:var(--text-sub);
  transition:color .2s ease,background-color .2s ease;
}
.nav-links a:hover{color:var(--brand);background:rgba(29,111,165,.07)}
.nav-links a.active{color:var(--brand);background:rgba(29,111,165,.10);font-weight:600}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.search-box{
  display:none;align-items:center;gap:8px;
  background:var(--bg-soft);border:1px solid transparent;border-radius:var(--radius-pill);
  padding:9px 14px;width:210px;transition:border-color .2s ease,background-color .2s ease,box-shadow .2s ease;
}
.search-box i{color:var(--text-mute);font-size:14px}
.search-box input{border:0;background:transparent;outline:none;width:100%;font-size:14px}
.search-box input::placeholder{color:var(--text-mute)}
.search-box:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(29,111,165,.12)}
.menu-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:var(--radius-s);
  border:1px solid var(--line);background:#fff;color:var(--text);
  cursor:pointer;transition:border-color .2s ease,color .2s ease;
}
.menu-toggle:hover{border-color:var(--brand);color:var(--brand)}
@media (min-width:1024px){
  .nav-links{display:flex}
  .search-box{display:flex}
  .menu-toggle{display:none}
}

/* ---------- 抽屉 ---------- */
.drawer{
  position:fixed;inset:72px 0 0 0;background:#fff;z-index:49;
  padding:16px 20px 40px;overflow-y:auto;
  transform:translateY(-8px);opacity:0;visibility:hidden;
  transition:opacity .22s ease,transform .22s ease,visibility .22s;
}
.drawer.is-open{transform:none;opacity:1;visibility:visible}
.drawer .search-box{display:flex;width:100%;margin-bottom:16px}
.drawer a.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  height:56px;border-bottom:1px solid var(--line);
  font-size:16px;font-weight:500;color:var(--text-sub);
}
.drawer a.drawer-link.active{color:var(--brand);font-weight:600}
.drawer .drawer-cta{margin-top:22px;width:100%}
@media (min-width:1024px){.drawer{display:none}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:10px;font-weight:600;font-size:15px;line-height:1;
  padding:0 20px;height:44px;border:1px solid transparent;cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;
  white-space:nowrap;
}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-deep);box-shadow:0 8px 20px rgba(232,134,58,.28)}
.btn-brand{background:var(--brand);color:#fff;height:48px}
.btn-brand:hover{background:var(--brand-deep);box-shadow:0 10px 24px rgba(29,111,165,.28)}
.btn-ghost{background:#fff;color:var(--text);border-color:var(--line-strong);height:40px}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;
  color:var(--brand);background:none;border:0;padding:0;cursor:pointer;
}
.btn-text i{transition:transform .2s ease}
.btn-text:hover{color:var(--brand-deep)}
.btn-text:hover i{transform:translateX(4px)}

/* ---------- 通用区块 ---------- */
.section{padding:64px 0}
@media (min-width:1024px){.section{padding:96px 0}}
.section-soft{background:var(--bg-soft)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.4px;color:var(--brand);
  background:rgba(29,111,165,.09);border-radius:var(--radius-pill);padding:6px 14px;margin-bottom:16px;
}
.h1{font-size:28px;line-height:1.25;font-weight:700;margin:0 0 16px;letter-spacing:-.2px}
.h2{font-size:23px;line-height:1.35;font-weight:600;margin:0 0 14px}
.h3{font-size:18px;line-height:1.5;font-weight:600;margin:0 0 10px}
.lede{font-size:16px;color:var(--text-sub);margin:0 0 24px;max-width:640px}
.section-head{max-width:760px;margin-bottom:36px}
.section-head p{color:var(--text-sub);font-size:16px;margin:0}
@media (min-width:1024px){
  .h1{font-size:40px;line-height:1.2}
  .h2{font-size:30px;line-height:1.3}
  .h3{font-size:20px}
}

/* ---------- Hero ---------- */
.hero{padding:40px 0 0;border-bottom:1px solid var(--line)}
.hero-inner{display:grid;grid-template-columns:1fr;gap:32px;align-items:center;padding-bottom:48px}
.hero-copy h1{margin-bottom:16px}
.hero-copy .lede{font-size:17px;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}
.hero-media{position:relative}
.hero-media img{width:100%;border-radius:var(--radius-l);box-shadow:var(--shadow-2);object-fit:cover}
.hero-media .media-tag{
  position:absolute;left:18px;bottom:18px;
  background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-2);
  padding:12px 16px;font-size:13px;color:var(--text-sub);
  display:flex;align-items:center;gap:10px;
}
.hero-media .media-tag b{display:block;font-size:15px;color:var(--text);font-weight:600}
@media (min-width:1024px){
  .hero{padding:56px 0 0}
  .hero-inner{grid-template-columns:1.05fr .95fr;gap:56px;padding-bottom:72px}
}

/* ---------- 功能卡网格 ---------- */
.feature-grid{display:grid;grid-template-columns:1fr;gap:22px}
.feature-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-1);
  transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
  display:flex;flex-direction:column;
}
.feature-card:hover{box-shadow:var(--shadow-2);transform:translateY(-3px);border-color:var(--line-strong)}
.feature-icon{
  width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(29,111,165,.10);color:var(--brand);font-size:19px;margin-bottom:16px;
}
.feature-card p.card-desc{color:var(--text-sub);font-size:15px;margin:0 0 16px}
.point-list{margin:0 0 18px;display:grid;gap:9px}
.point-list li{position:relative;padding-left:18px;font-size:14px;color:var(--text-sub);line-height:1.7}
.point-list li::before{
  content:"";position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:50%;
  background:var(--brand);opacity:.75;
}
.feature-card .btn-text{margin-top:auto}
@media (min-width:768px){.feature-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1280px){
  .feature-grid{gap:26px 26px;padding-bottom:30px}
  .feature-grid .feature-card:nth-child(even){transform:translateY(30px)}
  .feature-grid .feature-card:nth-child(even):hover{transform:translateY(27px)}
}

/* ---------- 数据条 ---------- */
.stat-strip{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius-l);
  padding:28px 24px;display:grid;grid-template-columns:repeat(2,1fr);gap:24px;
}
.stat-item .stat-num{font-size:24px;font-weight:700;color:var(--brand);line-height:1.2;margin-bottom:6px}
.stat-item .stat-num em{font-style:normal;color:var(--accent)}
.stat-item .stat-label{font-size:13px;color:var(--text-sub);line-height:1.6}
@media (min-width:768px){.stat-strip{grid-template-columns:repeat(4,1fr);padding:34px 32px}}
@media (min-width:1024px){.stat-item .stat-num{font-size:28px}}

/* ---------- 流程 ---------- */
.flow-grid{display:grid;grid-template-columns:1fr;gap:20px}
.flow-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-1);
}
.flow-num{font-size:26px;font-weight:700;color:var(--accent);letter-spacing:1px;margin-bottom:12px}
.flow-item p{color:var(--text-sub);font-size:15px;margin:0}
@media (min-width:768px){.flow-grid{grid-template-columns:repeat(3,1fr)}}

/* ---------- 场景卡 ---------- */
.scene-grid{display:grid;grid-template-columns:1fr;gap:22px}
.scene-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-1);transition:box-shadow .2s ease,transform .2s ease;
  display:flex;flex-direction:column;
}
.scene-card:hover{box-shadow:var(--shadow-2);transform:translateY(-3px)}
.scene-card img{width:100%;height:180px;object-fit:cover}
.scene-card .scene-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.scene-card p{color:var(--text-sub);font-size:15px;margin:0 0 16px}
.tag{
  display:inline-block;font-size:12px;font-weight:600;color:var(--brand);
  background:rgba(29,111,165,.10);border-radius:4px;padding:3px 9px;margin-bottom:10px;
}
.tag.tag-accent{background:rgba(232,134,58,.14);color:var(--accent-deep)}
@media (min-width:768px){.scene-grid{grid-template-columns:repeat(2,1fr)}}

/* ---------- 规格表 ---------- */
.spec-list{border-top:1px solid var(--line)}
.spec-row{
  display:flex;flex-wrap:wrap;gap:6px 24px;padding:16px 4px;
  border-bottom:1px solid var(--line);font-size:15px;
}
.spec-row .spec-key{width:180px;flex-shrink:0;color:var(--text-mute);font-size:14px}
.spec-row .spec-val{color:var(--text);flex:1;min-width:220px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 2px;font-size:17px;font-weight:600;color:var(--text);
  cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .faq-plus{
  flex-shrink:0;width:24px;height:24px;display:flex;align-items:center;justify-content:center;
  color:var(--brand);font-size:15px;transition:transform .22s ease;
}
.faq-item[open] summary .faq-plus{transform:rotate(45deg)}
.faq-item[open] summary{color:var(--brand)}
.faq-body{padding:0 2px 22px;color:var(--text-sub);font-size:15px;line-height:1.85}
.faq-body p{margin:0 0 .8em}
.faq-body p:last-child{margin-bottom:0}

/* ---------- 引用卡 ---------- */
.quote-card{
  margin:0;background:#fff;border:1px solid var(--line);border-left:3px solid var(--brand);
  border-radius:var(--radius);padding:24px 26px;box-shadow:var(--shadow-1);
}
.quote-card p{font-size:16px;color:var(--text-sub);margin:0 0 14px}
.quote-card footer{font-size:13px;color:var(--text-mute)}
.quote-card footer b{color:var(--text);font-weight:600}
.quote-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media (min-width:1024px){.quote-grid{grid-template-columns:1.4fr 1fr}}

/* ---------- 关联分类 ---------- */
.related-grid{display:grid;grid-template-columns:1fr;gap:20px}
.related-card{
  display:flex;align-items:flex-start;gap:16px;
  border:1px solid var(--line);border-radius:var(--radius);background:#fff;
  padding:22px;box-shadow:var(--shadow-1);transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.related-card:hover{box-shadow:var(--shadow-2);transform:translateY(-3px);border-color:var(--line-strong)}
.related-card .related-icon{
  width:44px;height:44px;border-radius:11px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:rgba(232,134,58,.13);color:var(--accent-deep);font-size:18px;
}
.related-card h3{margin:0 0 6px;font-size:17px;font-weight:600}
.related-card p{margin:0;font-size:14px;color:var(--text-sub)}
@media (min-width:768px){.related-grid{grid-template-columns:repeat(2,1fr)}}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:linear-gradient(0deg,rgba(29,111,165,.07),rgba(29,111,165,.07)),var(--bg-soft);
  border:1px solid var(--line);border-radius:var(--radius-l);
  padding:32px 26px;display:flex;flex-direction:column;gap:20px;align-items:flex-start;
}
.cta-band h2{margin:0 0 8px;font-size:22px;font-weight:600}
.cta-band p{margin:0;color:var(--text-sub);font-size:15px;max-width:620px}
.cta-band .btn{width:100%}
@media (min-width:768px){
  .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:40px 40px}
  .cta-band .btn{width:auto}
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:20px;bottom:24px;z-index:60;
  display:inline-flex;align-items:center;gap:9px;height:50px;padding:0 22px;
  background:var(--accent);color:#fff;font-size:15px;font-weight:600;
  border-radius:var(--radius-pill);box-shadow:0 12px 28px rgba(232,134,58,.32);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s,background-color .2s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:none}
.float-cta:hover{background:var(--accent-deep);transform:scale(1.03)}
.float-cta:focus-visible{outline:2px solid #fff;outline-offset:3px}
@media (max-width:520px){
  .float-cta{
    left:0;right:0;bottom:0;justify-content:center;border-radius:0;height:54px;
    padding-bottom:env(safe-area-inset-bottom);
  }
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-soft);border-top:1px solid var(--line);padding:56px 0 0;margin-top:8px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding-bottom:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-text{font-size:17px}
.footer-brand .brand-mark{width:30px;height:30px}
.footer-desc{font-size:14px;color:var(--text-sub);max-width:320px;margin:0}
.footer-title{font-size:14px;font-weight:700;color:var(--text);margin:0 0 14px;letter-spacing:.3px}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:14px;color:var(--text-sub);transition:color .2s ease}
.footer-links a:hover{color:var(--brand)}
.footer-contact{display:grid;gap:10px;font-size:14px;color:var(--text-sub)}
.footer-contact span i{color:var(--brand);width:16px;margin-right:8px}
.footer-bottom{
  border-top:1px solid var(--line);padding:18px 0 26px;
  display:flex;flex-wrap:wrap;gap:8px 24px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-mute);
}
.footer-bottom a{color:var(--text-mute)}
.footer-bottom a:hover{color:var(--brand)}
@media (min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr}}

/* roulang page: category2 */
:root{
  --brand:#1D6FA5;
  --brand-deep:#16527A;
  --accent:#E8863A;
  --bg:#FFFFFF;
  --bg-soft:#F6F8FB;
  --line:#E4EAF1;
  --line-strong:#D3DCE6;
  --text:#16232E;
  --text-sub:#5A6B7A;
  --text-mute:#8A99A8;
  --radius-s:8px;
  --radius:14px;
  --radius-l:20px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(20,40,60,.05),0 6px 18px rgba(20,40,60,.06);
  --shadow-2:0 2px 4px rgba(20,40,60,.06),0 14px 34px rgba(20,40,60,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
html body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans","Microsoft YaHei",ui-sans-serif,system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
@media (min-width:768px){.wrap{padding:0 24px}}
@media (min-width:1024px){.wrap{padding:0 32px}}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-1)}
.nav-inner{display:flex;align-items:center;gap:18px;min-height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:var(--text);white-space:nowrap;letter-spacing:.2px}
.logo svg{width:30px;height:30px;flex:none}
.logo:hover{color:var(--brand-deep)}
.nav-links{display:none;align-items:center;gap:4px;margin-left:6px}
.nav-links a{
  padding:8px 14px;border-radius:var(--radius-pill);font-size:15px;color:var(--text-sub);
  transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:var(--brand);background:#F1F7FB}
.nav-links a.active{color:var(--brand);background:#EAF3F9;font-weight:600}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.search{position:relative;display:none}
.search svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--text-mute)}
.search input{
  width:210px;height:40px;border-radius:var(--radius-pill);border:1px solid transparent;
  background:var(--bg-soft);padding:0 14px 0 38px;font-size:14px;color:var(--text);
  outline:none;transition:background .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.search input::placeholder{color:var(--text-mute)}
.search input:focus{background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(29,111,165,.12)}
.menu-btn{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0 11px;border:1px solid var(--line);border-radius:var(--radius-s);
  background:#fff;cursor:pointer;transition:border-color .2s ease;
}
.menu-btn span{display:block;height:2px;background:var(--text);border-radius:2px}
.menu-btn:hover{border-color:var(--brand)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:10px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(232,134,58,.26)}
.btn-accent:hover{background:#D3762C;transform:translateY(-1px);box-shadow:0 10px 22px rgba(232,134,58,.32)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px)}
.btn-ghost{background:#fff;border-color:var(--line-strong);color:var(--text)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.text-link{
  display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:15px;
  border-bottom:1px solid transparent;transition:border-color .2s ease,color .2s ease;
}
.text-link:hover{border-color:var(--brand);color:var(--brand-deep)}

/* ---------- drawer ---------- */
.drawer{
  position:fixed;inset:0;z-index:90;background:#fff;display:flex;flex-direction:column;
  padding:20px 20px 32px;transform:translateX(102%);transition:transform .28s ease;
  visibility:hidden;overflow-y:auto;
}
.drawer.open{transform:translateX(0);visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-close{
  width:40px;height:40px;border:1px solid var(--line);border-radius:var(--radius-s);
  background:#fff;color:var(--text-sub);font-size:20px;line-height:1;cursor:pointer;
}
.drawer-close:hover{border-color:var(--brand);color:var(--brand)}
.drawer-nav{margin-top:8px}
.drawer-nav a{
  display:flex;align-items:center;min-height:56px;border-bottom:1px solid var(--line);
  color:var(--text-sub);font-size:16px;
}
.drawer-nav a.active{color:var(--brand);font-weight:600}
.drawer-search{position:relative;margin-top:20px}
.drawer-search svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--text-mute)}
.drawer-search input{
  width:100%;height:44px;border-radius:var(--radius-pill);border:1px solid var(--line);
  background:var(--bg-soft);padding:0 16px 0 40px;font-size:14px;outline:none;
}
.drawer-search input:focus{background:#fff;border-color:var(--brand)}
.drawer-cta{margin-top:20px}

/* ---------- hero ---------- */
.cat-hero{background:var(--bg-soft);border-bottom:1px solid var(--line);overflow:hidden}
.cat-hero-inner{
  display:grid;grid-template-columns:1fr;gap:32px;
  padding:44px 0 52px;align-items:center;
}
.tag-badge{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:var(--radius-pill);
  background:#E7F1F8;color:var(--brand-deep);font-size:13.5px;font-weight:600;
}
.tag-badge::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}
.cat-hero h1{
  margin:16px 0 0;font-size:28px;line-height:1.25;font-weight:700;letter-spacing:-.4px;color:var(--text);
}
.hero-sub{margin:14px 0 0;color:var(--text-sub);font-size:16px;max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.hero-points{list-style:none;margin:24px 0 0;padding:0;display:grid;gap:8px}
.hero-points li{position:relative;padding-left:24px;color:var(--text-sub);font-size:14.5px}
.hero-points li::before{
  content:"";position:absolute;left:2px;top:10px;width:12px;height:7px;
  border-left:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(-45deg);
}
.hero-visual{position:relative;border-radius:var(--radius-l);overflow:hidden;box-shadow:var(--shadow-2);min-height:200px}
.hero-visual img{width:100%;height:100%;min-height:200px;object-fit:cover}
.hero-card{
  position:absolute;right:16px;bottom:16px;background:#fff;border-radius:var(--radius);
  box-shadow:var(--shadow-2);border:1px solid var(--line);padding:12px 16px;display:grid;gap:2px;
}
.hero-card b{font-size:15px;color:var(--text)}
.hero-card span{font-size:13px;color:var(--text-sub)}

/* ---------- sections ---------- */
.sec{padding:52px 0}
.sec-soft{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:760px;margin-bottom:28px}
.sec-head h2{margin:0;font-size:26px;line-height:1.35;font-weight:600;color:var(--text)}
.sec-head p{margin:12px 0 0;color:var(--text-sub);font-size:15.5px}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;text-transform:uppercase;
  color:var(--brand);margin-bottom:10px;
}

/* ---------- category layout ---------- */
.cat-layout{display:grid;grid-template-columns:1fr;gap:36px}
.cat-aside{position:static}
.aside-title{margin:0 0 12px;font-size:13px;font-weight:700;letter-spacing:1.4px;color:var(--text-mute);text-transform:uppercase}
.toc{list-style:none;margin:0;padding:0;border-left:2px solid var(--line);display:flex;gap:0;overflow-x:auto}
.toc li{flex:none}
.toc a{
  display:block;padding:9px 16px;font-size:14.5px;color:var(--text-sub);white-space:nowrap;
  border-left:2px solid transparent;margin-left:-2px;transition:color .2s ease,border-color .2s ease;
}
.toc a:hover,.toc a.on{color:var(--brand);border-color:var(--brand);font-weight:600}
.aside-btn{margin-top:20px;display:none}
.part{
  padding-bottom:36px;margin-bottom:36px;border-bottom:1px solid var(--line);
  scroll-margin-top:96px;
}
.part:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
.part h2{
  margin:0 0 14px;font-size:23px;line-height:1.4;font-weight:600;color:var(--text);
  padding-left:14px;border-left:3px solid var(--brand);
}
.part h3{margin:26px 0 10px;font-size:18px;font-weight:600;color:var(--text)}
.part p{margin:0 0 14px;color:var(--text-sub);font-size:16px}
.part figure{margin:22px 0 0}
.part figure img{width:100%;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow-1)}
.part figcaption{margin-top:10px;font-size:13px;color:var(--text-mute);text-align:center}

/* ---------- cards ---------- */
.card-grid{display:grid;grid-template-columns:1fr;gap:18px;margin-top:20px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow-1);
  transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.card:hover{box-shadow:var(--shadow-2);transform:translateY(-3px);border-color:var(--line-strong)}
.card-icon{
  width:40px;height:40px;border-radius:var(--radius-s);background:#E7F1F8;color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;margin-bottom:14px;
}
.card h3{margin:0 0 8px;font-size:17.5px;font-weight:600;color:var(--text)}
.card p{margin:0 0 12px;font-size:14.5px;color:var(--text-sub);line-height:1.75}
.dot-list{list-style:none;margin:0;padding:0;display:grid;gap:7px}
.dot-list li{position:relative;padding-left:16px;font-size:14px;color:var(--text-sub);line-height:1.7}
.dot-list li::before{
  content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;
  background:var(--brand);opacity:.7;
}
.card .text-link{margin-top:14px}

/* ---------- fee list ---------- */
.fee-list{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:12px}
.fee-list li{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 18px;box-shadow:var(--shadow-1);display:grid;gap:4px;
}
.fee-list b{font-size:15.5px;color:var(--text)}
.fee-list span{font-size:14px;color:var(--text-sub);line-height:1.7}

/* ---------- table ---------- */
.table-wrap{
  margin-top:20px;overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);
  background:#fff;box-shadow:var(--shadow-1);
}
table.compare{width:100%;border-collapse:collapse;min-width:680px;font-size:14.5px}
table.compare th,table.compare td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line)}
table.compare thead th{background:var(--bg-soft);font-size:14px;font-weight:600;color:var(--text)}
table.compare tbody tr:nth-child(even){background:#FBFCFE}
table.compare tbody tr:last-child td{border-bottom:0}
table.compare td:first-child{color:var(--text-sub);white-space:nowrap}
table.compare td{color:var(--text)}

/* ---------- steps ---------- */
.steps{display:grid;gap:14px;margin-top:20px}
.step{
  display:grid;grid-template-columns:52px 1fr;gap:14px;align-items:start;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 20px;box-shadow:var(--shadow-1);
  transition:box-shadow .2s ease,transform .2s ease;
}
.step:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.step .num{font-size:20px;font-weight:700;color:var(--accent);line-height:1.4}
.step b{display:block;font-size:16px;color:var(--text);margin-bottom:4px}
.step p{margin:0;font-size:14.5px;color:var(--text-sub);line-height:1.7}

/* ---------- spec bar ---------- */
.spec-bar{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:40px 0}
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.spec-item{text-align:left}
.spec-item b{display:block;font-size:26px;font-weight:700;color:var(--brand);line-height:1.2;letter-spacing:-.5px}
.spec-item:nth-child(2) b,.spec-item:nth-child(4) b{color:var(--accent)}
.spec-item span{display:block;margin-top:6px;font-size:13.5px;color:var(--text-sub)}

/* ---------- inline band ---------- */
.band{
  background:#EDF4F9;border:1px solid #DCE8F1;border-radius:var(--radius-l);
  padding:26px 28px;display:grid;gap:16px;margin-top:24px;
}
.band h3{margin:0;font-size:19px;font-weight:600;color:var(--text)}
.band p{margin:8px 0 0;font-size:15px;color:var(--text-sub)}

/* ---------- plan cards ---------- */
.plan-grid{display:grid;grid-template-columns:1fr;gap:18px;margin-top:20px}
.plan{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow-1);
}
.plan.featured{border-color:var(--accent);box-shadow:0 2px 4px rgba(232,134,58,.10),0 14px 34px rgba(232,134,58,.12)}
.plan h3{margin:0 0 6px;font-size:19px;font-weight:600;color:var(--text)}
.plan .plan-sub{margin:0 0 16px;font-size:14px;color:var(--text-sub)}
.plan .plan-price{font-size:24px;font-weight:700;color:var(--brand);margin:0 0 16px}
.plan .plan-price small{font-size:14px;font-weight:500;color:var(--text-sub);margin-left:6px}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:6px;
  font-size:12.5px;font-weight:600;
}
.badge-accent{background:var(--accent);color:#fff}
.badge-gray{background:#EEF2F6;color:var(--text-sub)}
.plan .badge{position:absolute;top:20px;right:20px}

/* ---------- faq ---------- */
.faq{max-width:800px;margin:0 auto}
.faq details{border-bottom:1px solid var(--line)}
.faq details:first-of-type{border-top:1px solid var(--line)}
.faq summary{
  list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:flex-start;
  gap:16px;padding:20px 0;font-size:17px;font-weight:600;color:var(--text);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";font-size:22px;font-weight:400;color:var(--brand);line-height:1;
  transition:transform .2s ease;flex:none;
}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .faq-body{padding:0 0 22px;color:var(--text-sub);font-size:15px;line-height:1.85;max-width:720px}

/* ---------- related ---------- */
.rel-grid{display:grid;grid-template-columns:1fr;gap:18px;margin-top:20px}
.rel-card{
  display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:16px;box-shadow:var(--shadow-1);transition:box-shadow .2s ease,transform .2s ease;
}
.rel-card:hover{box-shadow:var(--shadow-2);transform:translateY(-3px)}
.rel-card img{width:96px;height:72px;object-fit:cover;border-radius:var(--radius-s);flex:none}
.rel-card b{display:block;font-size:16px;color:var(--text);margin-bottom:6px}
.rel-card span{font-size:14px;color:var(--text-sub);line-height:1.7}
.rel-card .rel-tag{
  display:inline-block;font-size:12.5px;font-weight:600;color:var(--brand);
  background:#E7F1F8;border-radius:4px;padding:2px 8px;margin-bottom:8px;
}

/* ---------- cta band ---------- */
.cta-band{
  background:#EDF4F9;border:1px solid #DCE8F1;border-radius:var(--radius-l);
  padding:28px;display:grid;gap:18px;
}
.cta-band h2{margin:0;font-size:23px;line-height:1.4;font-weight:600;color:var(--text)}
.cta-band p{margin:8px 0 0;font-size:15px;color:var(--text-sub)}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-soft);border-top:1px solid var(--line);margin-top:0;padding-top:52px}
.foot-grid{display:grid;grid-template-columns:1fr;gap:30px}
.foot-brand .logo{margin-bottom:12px}
.foot-brand p{margin:0;font-size:14px;color:var(--text-sub);line-height:1.8;max-width:320px}
.foot-title{margin:0 0 12px;font-size:15px;font-weight:600;color:var(--text)}
.foot-links{display:grid;gap:2px}
.foot-links a{font-size:14px;color:var(--text-sub);padding:4px 0;transition:color .2s ease}
.foot-links a:hover{color:var(--brand)}
.foot-contact{display:grid;gap:8px;font-size:14px;color:var(--text-sub)}
.foot-contact b{color:var(--text);font-weight:600}
.foot-quote{
  margin-top:38px;padding-top:22px;border-top:1px solid var(--line);
  font-size:14px;color:var(--text-sub);
}
.foot-quote b{color:var(--text)}
.foot-bottom{
  margin-top:22px;padding:18px 0 26px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--text-mute);
}
.foot-bottom a{color:var(--text-mute)}
.foot-bottom a:hover{color:var(--brand)}

/* ---------- floating cta ---------- */
.float-cta{
  position:fixed;right:24px;bottom:28px;z-index:70;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease;
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta .btn{box-shadow:0 12px 28px rgba(232,134,58,.34)}
.float-cta.show .btn:hover{transform:scale(1.03)}

/* ---------- responsive ---------- */
@media (min-width:640px){
  .cat-hero h1{font-size:32px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .plan-grid{grid-template-columns:repeat(2,1fr)}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
  .spec-grid{grid-template-columns:repeat(4,1fr)}
  .cta-band{grid-template-columns:1fr auto;align-items:center;padding:32px 36px}
  .foot-grid{grid-template-columns:repeat(2,1fr)}
  .band{grid-template-columns:1fr auto;align-items:center}
}
@media (min-width:768px){
  .sec{padding:64px 0}
  .cat-hero-inner{padding:60px 0 72px;gap:40px}
  .cat-hero h1{font-size:36px}
  .sec-head h2{font-size:28px}
  .part h2{font-size:26px}
  .spec-item b{font-size:30px}
}
@media (min-width:1024px){
  .nav-links{display:flex}
  .search{display:block}
  .menu-btn{display:none}
  .cat-hero-inner{grid-template-columns:1.05fr .95fr;gap:56px;padding:72px 0 84px}
  .cat-hero h1{font-size:40px;line-height:1.2}
  .cat-layout{grid-template-columns:240px 1fr;gap:56px}
  .cat-aside{position:sticky;top:100px;align-self:start}
  .toc{display:block;overflow:visible}
  .toc a{padding:9px 0 9px 16px;white-space:normal}
  .aside-btn{display:inline-flex}
  .card-grid{grid-template-columns:repeat(3,1fr)}
  .foot-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
  .sec{padding:72px 0}
  .sec-head h2{font-size:30px}
  .part h2{font-size:30px}
}
@media (max-width:639px){
  .float-cta{
    left:0;right:0;bottom:0;padding:10px 12px calc(10px + env(safe-area-inset-bottom));
    background:rgba(255,255,255,.97);border-top:1px solid var(--line);
  }
  .float-cta .btn{width:100%;height:48px;font-size:15px}
  .float-cta.show .btn:hover{transform:none}
  .hero-actions .btn{width:100%}
  .cta-actions .btn{width:100%}
  .rel-card img{width:80px;height:64px}
}