/* roulang page: index */
:root{
  --brand:#1657D6;
  --brand-dark:#0F3E9E;
  --brand-soft:#EAF1FE;
  --accent:#FF6B2C;
  --accent-dark:#E4551A;
  --accent-soft:#FFF1E8;
  --teal:#0FA98C;
  --ink:#131C2B;
  --text-2:#43536B;
  --text-3:#7A889D;
  --line:#E4EAF3;
  --bg:#F5F8FC;
  --card:#FFFFFF;
  --footer:#0F1B30;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:10px;
  --r-pill:999px;
  --sh-1:0 2px 8px rgba(19,28,43,.06);
  --sh-2:0 8px 24px rgba(19,28,43,.08);
  --sh-3:0 16px 40px rgba(22,87,214,.12);
  --gap-section:88px;
  --c-max:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,Inter,sans-serif;
  font-size:17px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,border-color .2s ease}
a:hover{color:var(--accent)}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;color:var(--ink);letter-spacing:0}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
input,button{font-size:16px}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;box-shadow:0 0 0 4px var(--brand-soft)}
::selection{background:var(--brand-soft);color:var(--brand-dark)}
.container{width:100%;max-width:var(--c-max);margin:0 auto;padding:0 24px}
.grid-x{display:flex;flex-flow:row wrap}
.grid-x>.cell{flex:0 0 auto;min-width:0;max-width:100%}
.grid-margin-x{margin-left:-12px;margin-right:-12px}
.grid-margin-x>.cell{padding-left:12px;padding-right:12px}
.small-12{width:100%}
@media (min-width:640px){
  .medium-6{width:50%}
  .medium-4{width:33.3333%}
  .medium-8{width:66.6667%}
}
@media (min-width:1024px){
  .large-3{width:25%}
  .large-4{width:33.3333%}
  .large-5{width:41.6667%}
  .large-7{width:58.3333%}
  .large-8{width:66.6667%}
}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 0 rgba(19,28,43,.02);
  transition:box-shadow .25s ease;
}
.site-header.is-stuck{box-shadow:0 6px 20px rgba(19,28,43,.07)}
.header-inner{
  height:72px;display:flex;align-items:center;gap:20px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-icon{width:34px;height:34px;flex:0 0 auto}
.brand-name{
  font-size:21px;font-weight:700;color:var(--ink);letter-spacing:.5px;white-space:nowrap;
}
.brand:hover .brand-name{color:var(--brand)}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:12px}
.nav-link{
  position:relative;display:inline-block;
  font-size:16px;font-weight:500;color:var(--text-2);
  padding:24px 0;transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:16px;height:2px;
  background:var(--accent);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav-link:hover{color:var(--brand)}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto}
.search-box{
  display:flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);
  height:42px;padding:0 16px;transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-soft)}
.search-box i{color:var(--text-3);font-size:14px}
.search-box input{
  border:0;background:transparent;outline:none;width:150px;color:var(--ink);font-size:15px;
}
.search-box input::placeholder{color:var(--text-3)}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:#fff;color:var(--ink);align-items:center;justify-content:center;font-size:18px;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);
  font-size:16px;font-weight:600;border:1px solid transparent;
  transition:transform .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(255,107,44,.22)}
.btn-primary:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{background:#fff;color:var(--brand);border-color:var(--brand)}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand-dark);transform:translateY(-1px)}
.btn-outline:active{transform:translateY(1px)}
.btn-sm{height:42px;padding:0 18px;font-size:15px}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.35)}
.btn-icon{
  width:48px;height:48px;padding:0;border:1px solid var(--line);background:#fff;color:var(--text-2);border-radius:var(--r-sm);
}
.btn-icon:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.btn-icon.is-copied{color:var(--brand);border-color:var(--brand);background:var(--brand-soft)}

/* ---------- hero ---------- */
.hero{padding:64px 0 0;position:relative}
.hero-grid{align-items:center}
.hero-copy{padding-right:12px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand-soft);color:var(--brand-dark);
  font-size:13px;font-weight:500;padding:6px 14px;border-radius:var(--r-pill);
  margin-bottom:18px;
}
.eyebrow i{font-size:12px}
.hero h1{font-size:44px;line-height:1.28;margin-bottom:18px}
.hero h1 .hl{color:var(--brand-dark)}
.hero-sub{font-size:18px;color:var(--text-2);line-height:1.8;max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px}
.metrics{
  display:flex;flex-wrap:wrap;gap:12px;padding-top:24px;border-top:1px solid var(--line);
}
.metric{min-width:112px}
.metric-num{
  font-size:26px;font-weight:700;color:var(--brand-dark);
  font-variant-numeric:tabular-nums;line-height:1.2;
}
.metric-num small{font-size:14px;font-weight:600;color:var(--text-3);margin-left:2px}
.metric-label{font-size:13px;color:var(--text-3);margin-top:4px}
.hero-media{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-3);border:1px solid var(--line)}
.hero-media img{width:100%;height:420px;object-fit:cover}
.hero-media::after{content:"";position:absolute;inset:0;background:var(--brand);opacity:.11;pointer-events:none}
.hero-badge{
  position:absolute;left:20px;bottom:20px;z-index:2;
  background:rgba(255,255,255,.94);border-radius:var(--r-md);padding:12px 18px;box-shadow:var(--sh-2);
}
.hero-badge strong{display:block;font-size:15px;color:var(--ink)}
.hero-badge span{font-size:13px;color:var(--text-3)}

/* ---------- section base ---------- */
.section{padding:var(--gap-section) 0 0}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
  margin-bottom:28px;
}
.section-head h2{font-size:30px}
.section-head .section-desc{font-size:15px;color:var(--text-3);margin-top:8px}
.text-link{font-size:15px;font-weight:600;white-space:nowrap}
.text-link i{margin-left:4px;font-size:12px}
.text-link:hover{text-decoration:underline;text-underline-offset:4px}

/* ---------- topic covers ---------- */
.cover-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh-1);transition:transform .24s ease,box-shadow .24s ease;
  margin-bottom:24px;
}
.cover-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.cover-thumb{position:relative;overflow:hidden}
.cover-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .35s ease}
.cover-card:hover .cover-thumb img{transform:scale(1.03)}
.cover-tag{
  position:absolute;left:14px;top:14px;z-index:2;
  background:var(--brand);color:#fff;font-size:12px;font-weight:500;
  padding:5px 12px;border-radius:var(--r-pill);
}
.cover-body{padding:20px 20px 18px;display:flex;flex-direction:column;flex:1}
.cover-body h3{font-size:21px;font-weight:600;margin-bottom:10px}
.cover-body p{font-size:15px;color:var(--text-2);line-height:1.7;flex:1}
.cover-foot{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:16px;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.cover-foot i{color:var(--brand);transition:transform .2s ease}
.cover-card:hover .cover-foot i{transform:translateX(4px)}

/* ---------- index list ---------- */
.index-panel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:10px 26px;box-shadow:var(--sh-1);
}
.index-item{
  display:flex;align-items:center;gap:18px;
  min-height:62px;padding:8px 0;
  border-bottom:1px solid var(--line);
  position:relative;transition:transform .22s ease;
}
.index-item:last-child{border-bottom:0}
.index-item::before{
  content:"";position:absolute;left:-26px;top:12px;bottom:12px;width:3px;
  background:var(--brand);border-radius:0 3px 3px 0;transition:background-color .22s ease;
}
.index-item:hover{transform:translateX(4px)}
.index-item:hover::before{background:var(--accent)}
.index-num{
  font-size:14px;font-weight:700;color:var(--text-3);font-variant-numeric:tabular-nums;
  width:34px;flex:0 0 auto;
}
.index-title{font-size:17px;font-weight:600;color:var(--ink);flex:1}
.index-item:hover .index-title{color:var(--brand)}
.index-item i{color:var(--text-3);font-size:13px}
.index-item:hover i{color:var(--accent)}

/* ---------- featured rows ---------- */
.feature-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:36px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;margin-bottom:26px;box-shadow:var(--sh-1);
  transition:box-shadow .24s ease;
}
.feature-row:hover{box-shadow:var(--sh-2)}
.feature-row.reverse{flex-direction:row-reverse}
.feature-media{flex:0 0 41.6%;min-width:260px;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line)}
.feature-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .35s ease}
.feature-row:hover .feature-media img{transform:scale(1.03)}
.feature-copy{flex:1;min-width:260px}
.tag{
  display:inline-flex;align-items:center;
  font-size:13px;font-weight:500;padding:5px 12px;border-radius:var(--r-pill);
  background:var(--accent-soft);color:var(--accent-dark);
}
.tag-blue{background:var(--brand-soft);color:var(--brand-dark)}
.feature-copy h3{font-size:26px;margin:14px 0 12px}
.feature-copy p{font-size:16px;color:var(--text-2);line-height:1.8}
.feature-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:16px;
  margin-top:18px;font-size:13px;color:var(--text-3);
}
.feature-meta .enter{font-size:15px;font-weight:600;color:var(--brand);margin-left:auto}
.feature-meta .enter i{margin-left:4px;font-size:12px;transition:transform .2s ease}
.feature-row:hover .feature-meta .enter i{transform:translateX(4px)}

/* ---------- news list (CMS) ---------- */
.news-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh-1);margin-bottom:24px;height:100%;
  transition:transform .24s ease,box-shadow .24s ease;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.news-card-link{display:flex;gap:0;color:inherit;height:100%}
.news-card-link:hover{color:inherit}
.news-thumb{flex:0 0 168px;overflow:hidden;background:var(--brand-soft)}
.news-thumb img{width:100%;height:100%;min-height:150px;object-fit:cover;transition:transform .35s ease}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-body{padding:18px 20px;display:flex;flex-direction:column;flex:1;min-width:0}
.news-body h3{font-size:18px;font-weight:600;line-height:1.55;margin:10px 0 8px}
.news-card:hover .news-body h3{color:var(--brand)}
.news-body .news-sum{
  font-size:15px;color:var(--text-2);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:14px;font-size:13px;color:var(--text-3);
}
.news-meta .read-more{font-size:14px;font-weight:600;color:var(--brand)}
.news-meta .read-more i{margin-left:4px;font-size:11px}
.empty-state{
  min-height:200px;border:1px dashed var(--line);border-radius:var(--r-md);
  background:var(--brand-soft);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  text-align:center;padding:32px 20px;
}
.empty-state i{font-size:26px;color:var(--brand)}
.empty-state p{font-size:15px;color:var(--text-2)}

/* ---------- recommend ---------- */
.mini-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh-1);margin-bottom:24px;height:100%;
  transition:transform .24s ease,box-shadow .24s ease;
}
.mini-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.mini-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.mini-body{padding:14px 16px 16px}
.mini-body h4{font-size:16px;font-weight:600;line-height:1.55;margin-bottom:6px}
.mini-card:hover h4{color:var(--brand)}
.mini-body span{font-size:12px;color:var(--text-3)}

/* ---------- faq ---------- */
.faq-list{max-width:900px}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--sh-1);margin-bottom:12px;overflow:hidden;
}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;text-align:left;
  background:transparent;border:0;padding:20px 22px;
  font-size:17px;font-weight:600;color:var(--ink);
}
.faq-q .faq-idx{
  font-size:13px;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;
  width:26px;flex:0 0 auto;
}
.faq-q .faq-ico{margin-left:auto;color:var(--brand);font-size:15px;transition:transform .2s ease}
.faq-item.is-open .faq-ico{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a p{font-size:16px;line-height:1.8;color:var(--text-2);padding:0 22px 20px 62px}
.faq-item.is-open{box-shadow:var(--sh-2)}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--brand-soft);border-radius:var(--r-lg);
  padding:32px;display:flex;flex-wrap:wrap;align-items:center;gap:24px;
  border:1px solid #DCE7FB;
}
.cta-copy{flex:1;min-width:260px}
.cta-copy h2{font-size:22px;margin-bottom:8px}
.cta-copy p{font-size:15px;color:var(--text-2)}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

/* ---------- footer ---------- */
.site-footer{background:var(--footer);color:rgba(255,255,255,.7);margin-top:var(--gap-section);padding:56px 0 0}
.footer-grid{display:flex;flex-wrap:wrap;gap:40px}
.footer-brand{flex:1 1 280px;min-width:240px}
.footer-brand .brand-name{color:#fff;font-size:20px}
.footer-brand p{font-size:14px;line-height:1.9;margin-top:14px;max-width:320px}
.footer-col{flex:0 1 180px;min-width:150px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.7);line-height:2.1}
.footer-col a:hover{color:var(--accent)}
.footer-col span{display:block;font-size:14px;line-height:2.1}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.14);
  padding:22px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- mobile ---------- */
@media (max-width:1023px){
  :root{--gap-section:64px}
  .header-inner{height:64px;gap:14px}
  .main-nav{
    display:none;position:absolute;left:0;right:0;top:100%;
    background:#fff;flex-direction:column;align-items:stretch;gap:0;
    padding:10px 24px 22px;border-bottom:1px solid var(--line);box-shadow:var(--sh-2);margin-left:0;
  }
  .main-nav.is-open{display:flex}
  .nav-link{padding:14px 0;border-bottom:1px solid var(--line)}
  .nav-link::after{display:none}
  .search-box{display:none}
  .nav-toggle{display:inline-flex}
  .hero h1{font-size:34px}
  .hero-media img{height:340px}
  .feature-row{gap:24px;padding:22px}
  .feature-media{flex:1 1 100%}
}
@media (max-width:639px){
  :root{--gap-section:44px}
  body{font-size:16px}
  .container{padding:0 16px}
  .hero{padding-top:36px}
  .hero h1{font-size:30px;margin-bottom:14px}
  .hero-sub{font-size:16px;margin-bottom:22px}
  .hero-media img{height:240px}
  .hero-actions .btn{flex:1 1 100%}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px}
  .section-head h2{font-size:24px}
  .index-panel{padding:6px 16px}
  .index-item::before{left:-16px}
  .index-title{font-size:16px}
  .feature-copy h3{font-size:21px}
  .news-card-link{flex-direction:column}
  .news-thumb{flex:0 0 auto}
  .news-thumb img{height:180px;min-height:0}
  .cta-band{padding:24px 20px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 100%}
  .faq-a p{padding-left:22px}
  .footer-grid{gap:28px}
}
@media (min-width:1440px){
  .container{max-width:1280px}
}

/* roulang page: article */
:root{
  --c-primary:#1657D6;
  --c-primary-dark:#0F3E9E;
  --c-primary-soft:#EAF1FE;
  --c-accent:#FF6B2C;
  --c-accent-dark:#E4551A;
  --c-accent-soft:#FFF1E8;
  --c-green:#0FA98C;
  --c-ink:#131C2B;
  --c-sub:#43536B;
  --c-muted:#7A889D;
  --c-line:#E4EAF3;
  --c-bg:#F5F8FC;
  --c-card:#FFFFFF;
  --c-footer:#0F1B30;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:10px;
  --r-pill:999px;
  --sh-1:0 2px 8px rgba(19,28,43,.06);
  --sh-2:0 8px 24px rgba(19,28,43,.08);
  --sh-3:0 16px 40px rgba(22,87,214,.12);
  --sp-section:88px;
  --ease:220ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border-style:none}
a{color:var(--c-primary);text-decoration:none;transition:color var(--ease),background-color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease)}
a:hover{color:var(--c-accent)}
h1,h2,h3,h4,h5{margin:0;font-weight:700;color:var(--c-ink);letter-spacing:0}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;box-shadow:0 0 0 4px rgba(22,87,214,.15);border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.skip-link{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 16px;border-radius:0 0 10px 0;z-index:99}
.skip-link:focus{left:0;color:var(--c-primary)}

/* ============ 按钮与标签 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  border:1px solid transparent;transition:all var(--ease)
}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px}
.btn-primary{background:var(--c-accent);color:#fff;box-shadow:0 6px 16px rgba(255,107,44,.24)}
.btn-primary:hover{background:var(--c-accent-dark);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(255,107,44,.28)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{border-color:var(--c-primary);color:var(--c-primary);background:transparent}
.btn-outline:hover{background:rgba(22,87,214,.08);color:var(--c-primary-dark);transform:translateY(-1px)}
.btn-soft{background:#fff;color:var(--c-ink);border-color:var(--c-line)}
.btn-soft:hover{border-color:var(--c-primary);color:var(--c-primary)}
.btn-icon{width:44px;height:44px;min-height:44px;padding:0;border-radius:var(--r-sm);border:1px solid var(--c-line);background:#fff;color:var(--c-sub)}
.btn-icon:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft)}
.btn-icon.is-done{color:var(--c-primary);border-color:var(--c-primary);background:var(--c-primary-soft)}
.pill{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--r-pill);font-size:12px;font-weight:500;line-height:1.6}
.pill-primary{background:var(--c-primary);color:#fff}
.pill-soft{background:var(--c-primary-soft);color:var(--c-primary-dark)}
.pill-accent{background:var(--c-accent-soft);color:var(--c-accent-dark)}
.pill-line{border:1px solid var(--c-line);color:var(--c-sub);background:#fff}

/* ============ 头部导航 ============ */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--c-line);transition:box-shadow var(--ease)}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(19,28,43,.07)}
.header-inner{display:flex;align-items:center;gap:20px;height:72px}
.brand{display:flex;align-items:center;gap:10px;color:var(--c-ink);flex:0 0 auto}
.brand:hover{color:var(--c-ink)}
.brand-icon{width:38px;height:38px;flex:0 0 38px}
.brand-name{font-size:20px;font-weight:700;letter-spacing:.5px}
.main-nav{display:flex;align-items:center;gap:4px}
.nav-link{position:relative;padding:9px 13px;border-radius:8px;font-size:16px;font-weight:500;color:var(--c-sub)}
.nav-link:hover{color:var(--c-primary);background:var(--c-primary-soft)}
.nav-link.is-active{color:var(--c-primary);font-weight:700}
.nav-link.is-active::after{content:"";position:absolute;left:13px;right:13px;bottom:-3px;height:2px;border-radius:2px;background:var(--c-primary)}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-box{display:flex;align-items:center;gap:8px;height:42px;width:220px;padding:0 14px;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-pill);transition:all var(--ease)}
.search-box i{font-size:14px;color:var(--c-muted)}
.search-box input{flex:1;min-width:0;border:0;outline:0;background:transparent;font-size:14px}
.search-box input::placeholder{color:var(--c-muted)}
.search-box:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 4px rgba(22,87,214,.12)}
.nav-toggle{display:none;align-items:center;justify-content:center;width:44px;height:44px;border-radius:var(--r-sm);border:1px solid var(--c-line);background:#fff;color:var(--c-ink);font-size:18px}
.nav-toggle:hover{border-color:var(--c-primary);color:var(--c-primary)}

/* ============ 面包屑 ============ */
.crumb-bar{padding:22px 0 6px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-muted)}
.breadcrumb a{color:var(--c-sub)}
.breadcrumb a:hover{color:var(--c-accent);text-decoration:underline;text-underline-offset:3px}
.breadcrumb .sep{color:#C3CDDC}
.breadcrumb .current{color:var(--c-primary);font-weight:600;max-width:640px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 文章头部 ============ */
.article-head-wrap{padding:14px 0 34px}
.article-head{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:32px 36px;position:relative;overflow:hidden}
.article-head::before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:linear-gradient(90deg,var(--c-primary) 0 60%,var(--c-accent) 60% 100%)}
.article-title{font-size:44px;line-height:1.35;margin:16px 0 14px;max-width:900px}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:13px;color:var(--c-muted)}
.meta-row span{display:inline-flex;align-items:center;gap:6px}
.meta-row i{color:var(--c-muted);font-size:13px}
.lead-block{margin-top:22px;padding:20px 24px;background:var(--c-primary-soft);border-left:3px solid var(--c-primary);border-radius:12px;font-size:16px;line-height:1.85;color:var(--c-sub)}

/* ============ 主体布局 ============ */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:44px;padding-bottom:var(--sp-section)}
.article-main{min-width:0}
.article-body{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:38px 42px}
.article-body > *:first-child{margin-top:0}
.article-body p{font-size:17px;line-height:1.9;color:#22303F;margin:0 0 1.3em}
.article-body h2{font-size:28px;line-height:1.4;margin:2em 0 .75em;padding-left:14px;border-left:4px solid var(--c-primary);scroll-margin-top:96px}
.article-body h3{font-size:21px;line-height:1.5;margin:1.7em 0 .6em;color:var(--c-primary-dark)}
.article-body h4{font-size:18px;line-height:1.6;margin:1.5em 0 .5em}
.article-body ul,.article-body ol{margin:1.1em 0;padding-left:1.5em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{font-size:17px;line-height:1.8;margin-bottom:.45em;color:#22303F}
.article-body li::marker{color:var(--c-primary);font-weight:600}
.article-body a{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--c-accent)}
.article-body img{border-radius:14px;margin:1.6em auto;box-shadow:var(--sh-1)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--c-muted);margin-top:10px}
.article-body blockquote{margin:1.6em 0;padding:16px 22px;background:var(--c-primary-soft);border-left:3px solid var(--c-accent);border-radius:12px;color:var(--c-sub)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;background:#fff}
.article-body th{background:var(--c-primary-soft);color:var(--c-primary-dark);font-weight:600;text-align:left}
.article-body th,.article-body td{padding:11px 14px;border-bottom:1px solid var(--c-line);line-height:1.7}
.article-body tr:nth-child(even) td{background:#F8FAFE}
.article-body code{padding:2px 6px;background:#F1F5FC;border-radius:6px;font-size:15px}
.article-body hr{border:0;height:1px;background:var(--c-line);margin:2em 0}

/* ============ 标签行 ============ */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:24px}
.tag-row .tag-label{font-size:13px;color:var(--c-muted)}
.tag{display:inline-flex;align-items:center;padding:6px 14px;border-radius:var(--r-pill);background:#fff;border:1px solid var(--c-line);font-size:13px;color:var(--c-sub);transition:all var(--ease)}
.tag:hover{border-color:var(--c-accent);color:var(--c-accent-dark);background:var(--c-accent-soft)}

/* ============ 空态 ============ */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;
  min-height:260px;background:#fff;border:1px dashed var(--c-line);border-radius:var(--r-lg);padding:36px 24px
}
.empty-state i{font-size:34px;color:var(--c-primary);margin-bottom:14px}
.empty-state h3{font-size:20px;margin-bottom:8px}
.empty-state p{font-size:15px;color:var(--c-muted);margin-bottom:18px}

/* ============ 收藏分享条 ============ */
.share-strip{margin-top:28px;background:var(--c-primary-soft);border-radius:var(--r-lg);padding:26px 30px;display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between}
.share-strip h2{font-size:22px;line-height:1.4}
.share-strip p{font-size:15px;color:var(--c-sub);margin-top:6px}
.share-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.copy-done{font-size:13px;color:var(--c-primary);font-weight:600;min-width:52px}

/* ============ 相关条目 ============ */
.related{margin-top:var(--sp-section)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px}
.section-head h2{font-size:30px;line-height:1.35}
.section-head p{font-size:15px;color:var(--c-muted);margin-top:6px}
.section-head a{font-size:14px;font-weight:600}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.rcard{display:block;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);transition:all var(--ease)}
.rcard:hover{transform:translateY(-2px);box-shadow:var(--sh-2);color:inherit}
.rcard-media{position:relative;aspect-ratio:16/10;overflow:hidden;border-bottom:1px solid var(--c-line);background:var(--c-primary-soft)}
.rcard-media img{width:100%;height:100%;object-fit:cover;transition:transform 300ms ease}
.rcard:hover .rcard-media img{transform:scale(1.03)}
.rcard-body{padding:16px 18px 18px}
.rcard-body h3{font-size:17px;font-weight:600;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rcard:hover .rcard-body h3{color:var(--c-primary)}
.rcard-body span{display:inline-block;margin-top:10px;font-size:13px;color:var(--c-muted)}

/* ============ 返回入口 ============ */
.back-row{display:flex;flex-wrap:wrap;gap:14px 28px;align-items:center;margin-top:34px;padding-top:24px;border-top:1px solid var(--c-line)}
.back-row a{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600}

/* ============ 侧栏 ============ */
.sidebar{display:flex;flex-direction:column;gap:20px;position:sticky;top:96px;align-self:start}
.side-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);box-shadow:var(--sh-1);padding:20px 20px 22px}
.side-title{font-size:15px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-title i{color:var(--c-primary);font-size:14px}
.toc-list a{display:block;padding:8px 0 8px 14px;border-left:2px solid var(--c-line);font-size:14px;line-height:1.6;color:var(--c-sub);transition:all var(--ease)}
.toc-list a:hover,.toc-list a.is-active{color:var(--c-primary);border-left-color:var(--c-accent);background:rgba(22,87,214,.05)}
.toc-empty{font-size:13px;color:var(--c-muted);line-height:1.8}
.side-links a{display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-bottom:1px solid var(--c-line)}
.side-links a:last-child{border-bottom:0;padding-bottom:0}
.side-links img{width:64px;height:44px;object-fit:cover;border-radius:8px;flex:0 0 64px;border:1px solid var(--c-line)}
.side-links strong{display:block;font-size:14px;font-weight:600;line-height:1.55;color:var(--c-ink)}
.side-links a:hover strong{color:var(--c-primary)}
.side-links em{font-style:normal;font-size:12px;color:var(--c-muted)}
.side-cta p{font-size:14px;color:var(--c-muted);margin:8px 0 16px;line-height:1.8}
.side-cta .btn{width:100%;margin-bottom:10px}
.side-cta .btn:last-child{margin-bottom:0}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-footer);color:#fff;padding:72px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand-name{color:#fff}
.footer-brand p{font-size:14px;line-height:2;color:rgba(255,255,255,.7);margin-top:16px;max-width:340px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col a,.footer-col span{display:block;font-size:14px;line-height:2.1;color:rgba(255,255,255,.7)}
.footer-col a:hover{color:var(--c-accent)}
.footer-bottom{margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.6)}

/* ============ 响应式 ============ */
@media (max-width:1200px){
  .article-head{padding:28px 30px}
  .article-body{padding:32px 34px}
}
@media (max-width:1024px){
  :root{--sp-section:64px}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:32px}
  .sidebar{position:static;top:auto}
  .article-title{font-size:34px}
  .article-body h2{font-size:25px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .search-box{width:180px}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .main-nav{
    position:fixed;top:56px;left:0;right:0;z-index:55;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;padding:10px 20px 20px;border-bottom:1px solid var(--c-line);box-shadow:0 18px 30px rgba(19,28,43,.1);
    transform:translateY(-10px);opacity:0;visibility:hidden;transition:all var(--ease)
  }
  .main-nav.is-open{transform:none;opacity:1;visibility:visible}
  .nav-link{padding:14px 4px;border-radius:0;border-bottom:1px solid var(--c-line);font-size:16px}
  .nav-link:hover{background:transparent}
  .nav-link.is-active::after{display:none}
  .header-inner{height:56px}
  .search-box{display:none}
}
@media (max-width:640px){
  :root{--sp-section:44px}
  body{font-size:16px}
  .container{padding:0 16px}
  .article-head{padding:24px 20px;border-radius:var(--r-md)}
  .article-title{font-size:30px}
  .article-body{padding:24px 20px;border-radius:var(--r-md)}
  .article-body p,.article-body li{font-size:16px}
  .article-body h2{font-size:24px}
  .article-body h3{font-size:19px}
  .section-head h2{font-size:24px}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .share-strip{flex-direction:column;align-items:flex-start;padding:22px 20px}
  .share-actions{width:100%}
  .share-actions .btn{flex:1}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{padding:52px 0 24px}
  .breadcrumb .current{max-width:220px}
}
@media (max-width:420px){
  .brand-name{font-size:18px}
  .btn-sm{padding:0 12px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}

/* roulang page: category1 */
:root{
  --c-primary:#1657D6;
  --c-primary-dark:#0F3E9E;
  --c-primary-soft:#EAF1FE;
  --c-accent:#FF6B2C;
  --c-accent-dark:#E4551A;
  --c-accent-soft:#FFF1E8;
  --c-teal:#0FA98C;
  --ink:#131C2B;
  --ink-2:#43536B;
  --ink-3:#7A889D;
  --line:#E4EAF3;
  --bg:#F5F8FC;
  --surface:#FFFFFF;
  --footer-bg:#0F1B30;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:10px;
  --r-pill:999px;
  --sh-1:0 2px 8px rgba(19,28,43,.06);
  --sh-2:0 8px 24px rgba(19,28,43,.08);
  --sh-3:0 16px 40px rgba(22,87,214,.12);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",Inter,Roboto,system-ui,-apple-system,"Segoe UI",sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.88;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-accent);text-decoration:underline;text-underline-offset:3px;}
h1,h2,h3,h4{margin:0 0 .6em;line-height:1.35;font-weight:700;color:var(--ink);}
h1{font-size:44px;}
h2{font-size:30px;}
h3{font-size:22px;}
h4{font-size:18px;}
p{margin:0 0 1.1em;}
ul,ol{margin:0;padding:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;box-shadow:0 0 0 4px rgba(22,87,214,.16);border-radius:8px;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:1440px){
  .container{max-width:1280px;}
}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 22px;
  border-radius:var(--r-sm);
  font-size:16px;
  font-weight:600;
  line-height:1;
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color .2s ease,color .2s ease,box-shadow .2s ease,transform .18s ease,border-color .2s ease;
  text-decoration:none;
}
.btn:hover{text-decoration:none;transform:translateY(-1px);}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--c-accent);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--c-accent-dark);color:#fff;}
.btn-outline{background:#fff;color:var(--c-primary);border-color:var(--c-primary);}
.btn-outline:hover{background:rgba(22,87,214,.08);color:var(--c-primary-dark);}
.btn-ghost{background:#fff;color:var(--ink-2);border-color:var(--line);}
.btn-ghost:hover{background:var(--bg);color:var(--c-primary);border-color:var(--c-primary);}
.btn-sm{min-height:40px;padding:0 18px;font-size:15px;}
.btn-icon{background:#fff;border-color:var(--line);color:var(--ink-2);}
.btn-icon:hover{color:var(--c-primary);border-color:var(--c-primary);}
.btn-icon.is-done{color:var(--c-primary);border-color:var(--c-primary);background:var(--c-primary-soft);}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.header-inner{
  display:flex;
  align-items:center;
  gap:26px;
  height:72px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand:hover{text-decoration:none;}
.brand-icon{width:38px;height:38px;flex:0 0 38px;}
.brand-name{
  font-size:20px;
  font-weight:700;
  color:var(--ink);
  letter-spacing:.4px;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 14px;
  border-radius:var(--r-pill);
  font-size:16px;
  font-weight:500;
  color:var(--ink-2);
  transition:color .2s ease,background-color .2s ease;
}
.nav-link:hover{color:var(--c-primary);background:var(--c-primary-soft);text-decoration:none;}
.nav-link.is-active{color:var(--c-primary);font-weight:600;}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:-4px;
  height:2px;
  border-radius:2px;
  background:var(--c-primary);
}
.header-actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:12px;
}
.search-box{
  display:flex;
  align-items:center;
  gap:8px;
  height:42px;
  padding:0 16px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  background:#fff;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 4px rgba(22,87,214,.12);}
.search-box i{color:var(--ink-3);font-size:14px;}
.search-box input{
  border:0;
  outline:0;
  width:150px;
  font-size:14px;
  color:var(--ink);
  background:transparent;
  font-family:inherit;
}
.search-box input::placeholder{color:var(--ink-3);}
.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  background:#fff;
  color:var(--ink);
  font-size:18px;
  cursor:pointer;
}
.nav-toggle:hover{border-color:var(--c-primary);color:var(--c-primary);}
.nav-mask{
  position:fixed;
  inset:0;
  background:rgba(22,87,214,.32);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;
  z-index:70;
}
.nav-mask.is-open{opacity:1;visibility:visible;}

/* ---------- 页面首屏 ---------- */
.page-hero{
  position:relative;
  padding:56px 0 64px;
  background:
    linear-gradient(180deg,rgba(234,241,254,.95),rgba(245,248,252,.99)),
    url(/assets/images/backpic/back-1.webp) center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-3);
  margin-bottom:18px;
}
.breadcrumb a{color:var(--ink-2);}
.breadcrumb a:hover{color:var(--c-accent);}
.breadcrumb .sep{color:var(--ink-3);}
.breadcrumb .current{color:var(--c-primary);font-weight:600;}
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 14px;
  border-radius:var(--r-pill);
  background:var(--c-accent-soft);
  color:var(--c-accent-dark);
  font-size:13px;
  font-weight:600;
  letter-spacing:.3px;
  margin-bottom:16px;
}
.page-hero h1{max-width:820px;margin-bottom:14px;}
.hero-sub{
  max-width:720px;
  font-size:18px;
  color:var(--ink-2);
  margin-bottom:26px;
}
.hero-stats{
  display:flex;
  flex-wrap:wrap;
  gap:14px 44px;
}
.stat{display:flex;flex-direction:column;gap:2px;}
.stat-num{
  font-size:26px;
  font-weight:700;
  color:var(--c-primary-dark);
  font-variant-numeric:tabular-nums;
  letter-spacing:.5px;
  line-height:1.2;
}
.stat-label{font-size:13px;color:var(--ink-3);}

/* ---------- 板块 ---------- */
.section{padding:88px 0;}
.section-white{background:var(--surface);}
.section-soft{background:var(--c-primary-soft);}
.section-head{margin-bottom:32px;}
.section-head h2{margin-bottom:8px;}
.section-head p{color:var(--ink-2);font-size:16px;margin:0;max-width:760px;}

/* ---------- 两栏布局 ---------- */
.layout-grid{align-items:flex-start;}
.side-sticky{position:sticky;top:100px;}
.index-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:var(--sh-1);
  padding:22px 20px;
}
.index-card h3{
  font-size:16px;
  margin:0 0 14px;
  color:var(--ink);
}
.index-card h3 span{display:block;font-size:13px;font-weight:400;color:var(--ink-3);margin-top:4px;}
.index-list{list-style:none;}
.index-list li + li{margin-top:4px;}
.index-list a{
  display:flex;
  align-items:center;
  gap:10px;
  padding:11px 12px;
  border-radius:12px;
  font-size:15px;
  color:var(--ink-2);
  transition:background-color .2s ease,color .2s ease,transform .2s ease;
}
.index-list a:hover{
  background:var(--c-primary-soft);
  color:var(--c-primary);
  text-decoration:none;
  transform:translateX(3px);
}
.index-no{
  font-size:13px;
  font-weight:700;
  color:var(--c-primary);
  font-variant-numeric:tabular-nums;
}
.index-count{
  margin-left:auto;
  font-size:12px;
  color:var(--ink-3);
  background:var(--bg);
  border-radius:var(--r-pill);
  padding:2px 10px;
  font-variant-numeric:tabular-nums;
}
.side-note{
  margin-top:16px;
  padding:18px 20px;
  border-radius:18px;
  background:#fff;
  border:1px dashed var(--line);
  font-size:14px;
  color:var(--ink-2);
}
.side-note strong{display:block;color:var(--ink);font-size:15px;margin-bottom:6px;}
.side-note a{font-weight:600;}

/* ---------- 封面大卡 ---------- */
.cover-feature{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--sh-3);
  margin-bottom:40px;
}
.cover-feature img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  transition:transform .4s ease;
}
.cover-feature:hover img{transform:scale(1.03);}
.cover-feature-body{
  position:absolute;
  inset:auto 0 0 0;
  padding:26px 28px;
  color:#fff;
  background:linear-gradient(to top,rgba(15,27,48,.88),rgba(15,27,48,.32) 62%,rgba(15,27,48,0));
}
.cover-feature-body .tag{
  background:var(--c-accent);
  color:#fff;
  border-color:transparent;
  margin-bottom:10px;
}
.cover-feature-body h2{
  color:#fff;
  font-size:26px;
  margin:0 0 8px;
}
.cover-feature-body p{
  margin:0;
  font-size:15px;
  color:rgba(255,255,255,.86);
  max-width:640px;
}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  padding:3px 12px;
  border-radius:var(--r-pill);
  background:var(--c-primary-soft);
  color:var(--c-primary-dark);
  font-size:13px;
  font-weight:500;
  border:1px solid transparent;
}
.tag-soft{background:var(--c-accent-soft);color:var(--c-accent-dark);}
.tag-line{background:#fff;border-color:var(--line);color:var(--ink-2);}

/* ---------- 条目列表 ---------- */
.block-title{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  margin-bottom:6px;
}
.block-title h2{font-size:24px;margin:0;}
.block-title .more{font-size:15px;font-weight:600;white-space:nowrap;}
.entry-list{list-style:none;}
.entry-item{
  position:relative;
  display:flex;
  align-items:flex-start;
  gap:18px;
  padding:22px 6px 22px 18px;
  border-bottom:1px solid var(--line);
  transition:transform .22s ease;
}
.entry-item::before{
  content:"";
  position:absolute;
  left:0;
  top:24px;
  bottom:24px;
  width:3px;
  border-radius:3px;
  background:var(--c-primary);
  transition:background-color .22s ease;
}
.entry-item:hover{transform:translateX(4px);}
.entry-item:hover::before{background:var(--c-accent);}
.entry-item:hover .entry-no{color:var(--c-accent);}
.entry-item:hover .entry-title{color:var(--c-primary);}
.entry-no{
  flex:0 0 38px;
  font-size:15px;
  font-weight:700;
  color:var(--c-primary);
  font-variant-numeric:tabular-nums;
  padding-top:3px;
  transition:color .22s ease;
}
.entry-body{flex:1 1 auto;min-width:0;}
.entry-title{
  font-size:20px;
  margin:0 0 6px;
  color:var(--ink);
  transition:color .22s ease;
}
.entry-desc{
  margin:0 0 8px;
  font-size:15px;
  color:var(--ink-2);
  line-height:1.7;
}
.entry-meta{
  display:flex;
  flex-wrap:wrap;
  gap:8px 18px;
  font-size:13px;
  color:var(--ink-3);
}
.entry-meta i{margin-right:5px;color:var(--ink-3);}
.entry-arrow{
  flex:0 0 auto;
  align-self:center;
  color:var(--ink-3);
  font-size:16px;
  transition:color .22s ease,transform .22s ease;
}
.entry-item:hover .entry-arrow{color:var(--c-accent);transform:translateX(3px);}

/* ---------- 适用场景 ---------- */
.scene-card{
  display:flex;
  gap:0;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--sh-1);
  margin-bottom:24px;
  transition:box-shadow .25s ease,transform .25s ease;
}
.scene-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.scene-card img{
  flex:0 0 42%;
  width:42%;
  object-fit:cover;
  min-height:230px;
}
.scene-body{padding:26px 28px;flex:1 1 auto;}
.scene-body h3{font-size:21px;margin:12px 0 8px;}
.scene-body p{font-size:15px;color:var(--ink-2);line-height:1.75;margin:0 0 12px;}
.dot-list{list-style:none;font-size:15px;color:var(--ink-2);}
.dot-list li{position:relative;padding-left:18px;line-height:1.8;}
.dot-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:12px;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--c-primary);
}

/* ---------- 流程 ---------- */
.step-flow{list-style:none;}
.step{
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:24px 22px;
  box-shadow:var(--sh-1);
  height:100%;
  transition:box-shadow .25s ease,transform .25s ease;
}
.step:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.step-no{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px;
  height:38px;
  border-radius:12px;
  background:var(--c-primary-soft);
  color:var(--c-primary-dark);
  font-weight:700;
  font-size:15px;
  font-variant-numeric:tabular-nums;
  margin-bottom:14px;
}
.step h3{font-size:18px;margin:0 0 8px;}
.step p{font-size:15px;color:var(--ink-2);margin:0;line-height:1.75;}

/* ---------- FAQ ---------- */
.accordion{
  background:transparent;
  border:0;
  margin:0;
  list-style:none;
  max-width:900px;
}
.accordion-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:14px;
  box-shadow:var(--sh-1);
  margin-bottom:12px;
  overflow:hidden;
}
.accordion-item.is-active{border-color:rgba(22,87,214,.35);}
.accordion-title{
  display:flex;
  align-items:center;
  gap:10px;
  padding:18px 22px;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  background:#fff;
  border:0;
  transition:color .2s ease;
}
.accordion-title:hover{background:#fff;color:var(--c-primary);text-decoration:none;}
.accordion-title::before{
  content:"+";
  position:static;
  order:2;
  margin-left:auto;
  margin-right:0;
  font-size:20px;
  line-height:1;
  color:var(--c-primary);
  transition:transform .2s ease;
}
.accordion-item.is-active .accordion-title::before{content:"–";}
.accordion-title[aria-expanded="true"]::before{content:"–";}
.accordion-content{
  padding:0 22px 20px;
  border:0;
  background:#fff;
  color:var(--ink-2);
  font-size:16px;
  line-height:1.8;
}
.accordion-content p:last-child{margin-bottom:0;}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--c-primary-soft);
  border-radius:var(--r-lg);
  padding:32px 36px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
}
.cta-band h2{font-size:22px;margin:0 0 6px;}
.cta-band p{margin:0;font-size:15px;color:var(--ink-2);max-width:520px;}
.cta-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--footer-bg);
  color:#fff;
  padding:64px 0 26px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:36px;
}
.footer-brand p{
  margin-top:16px;
  font-size:14px;
  line-height:1.85;
  color:rgba(255,255,255,.7);
  max-width:340px;
}
.site-footer .brand-name{color:#fff;}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:#fff;
  margin:0 0 14px;
  letter-spacing:.4px;
}
.footer-col a,.footer-col span{
  display:block;
  font-size:14px;
  line-height:2;
  color:rgba(255,255,255,.7);
}
.footer-col a:hover{color:var(--c-accent);text-decoration:none;}
.footer-bottom{
  margin-top:40px;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.14);
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.6);
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .search-box{display:none;}
  .nav-toggle{display:inline-flex;}
  .main-nav{
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    width:min(78vw,320px);
    margin-left:0;
    padding:88px 20px 28px;
    background:#fff;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    transform:translateX(100%);
    transition:transform .28s ease;
    box-shadow:-10px 0 30px rgba(19,28,43,.14);
    z-index:75;
    overflow-y:auto;
  }
  .main-nav.is-open{transform:translateX(0);}
  .nav-link{padding:14px 14px;border-radius:12px;font-size:16px;}
  .nav-link.is-active::after{display:none;}
  .nav-link.is-active{background:var(--c-primary-soft);}
  .side-sticky{position:static;}
  .section{padding:64px 0;}
  h1{font-size:36px;}
}
@media (max-width:767px){
  body{font-size:16px;line-height:1.85;}
  .container{padding-left:20px;padding-right:20px;}
  .header-inner{height:64px;gap:12px;}
  .brand-icon{width:34px;height:34px;flex:0 0 34px;}
  .brand-name{font-size:18px;}
  .section{padding:44px 0;}
  h1{font-size:30px;}
  h2{font-size:24px;}
  h3{font-size:19px;}
  .page-hero{padding:36px 0 44px;}
  .hero-sub{font-size:16px;}
  .hero-stats{gap:12px 28px;}
  .stat-num{font-size:22px;}
  .scene-card{flex-direction:column;}
  .scene-card img{width:100%;flex:0 0 auto;min-height:190px;aspect-ratio:16/10;}
  .scene-body{padding:22px 20px;}
  .cover-feature-body{padding:20px 18px;}
  .cover-feature-body h2{font-size:19px;}
  .cover-feature-body p{font-size:14px;}
  .entry-item{gap:12px;padding:18px 4px 18px 14px;}
  .entry-no{flex:0 0 30px;font-size:14px;}
  .entry-title{font-size:17px;}
  .entry-arrow{display:none;}
  .cta-band{padding:24px 20px;}
  .cta-actions{width:100%;flex-direction:column;align-items:stretch;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-brand{grid-column:1 / -1;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:520px){
  .container{padding-left:16px;padding-right:16px;}
  .footer-grid{grid-template-columns:1fr;}
  .entry-meta{gap:6px 14px;}
}

/* roulang page: category2 */
:root{
  --brand:#1657D6;
  --brand-dark:#0F3E9E;
  --brand-light:#EAF1FE;
  --accent:#FF6B2C;
  --accent-dark:#E4551A;
  --accent-light:#FFF1E8;
  --teal:#0FA98C;
  --ink:#131C2B;
  --ink-2:#43536B;
  --ink-3:#7A889D;
  --line:#E4EAF3;
  --bg:#F5F8FC;
  --surface:#FFFFFF;
  --footer-bg:#0F1B30;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:10px;
  --r-pill:999px;
  --sh-1:0 2px 8px rgba(19,28,43,.06);
  --sh-2:0 8px 24px rgba(19,28,43,.08);
  --sh-3:0 16px 40px rgba(22,87,214,.12);
  --container:1200px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-num:"Inter","Roboto","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;color:var(--ink);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
img{display:block;max-width:100%;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--accent);}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;box-shadow:0 0 0 4px rgba(22,87,214,.14);border-radius:6px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
@media (min-width:1440px){.container{max-width:1280px;}}

/* ---------- 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-stuck{box-shadow:0 4px 16px rgba(19,28,43,.07);}
.header-inner{display:flex;align-items:center;gap:20px;height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;}
.brand-icon{width:38px;height:38px;flex:0 0 38px;}
.brand-name{font-size:19px;font-weight:700;color:var(--ink);letter-spacing:.4px;}
.main-nav{position:relative;display:flex;align-items:center;gap:2px;margin-left:6px;}
.nav-link{position:relative;display:inline-flex;align-items:center;height:72px;padding:0 14px;font-size:15.5px;font-weight:500;color:var(--ink-2);}
.nav-link:hover{color:var(--brand);}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;background:var(--brand);border-radius:2px;}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.search-box{display:flex;align-items:center;gap:8px;height:42px;min-width:216px;padding:0 14px;background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);transition:border-color .2s ease,box-shadow .2s ease;}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px rgba(22,87,214,.12);}
.search-box i{color:var(--ink-3);font-size:14px;}
.search-box input{width:100%;border:0;outline:0;background:transparent;font-family:inherit;font-size:14.5px;color:var(--ink);}
.search-box input::placeholder{color:var(--ink-3);}
.mobile-extra{display:none;flex-direction:column;gap:12px;padding-top:16px;margin-top:10px;border-top:1px solid var(--line);}
.mobile-extra .search-box{width:100%;min-width:0;}
.nav-toggle{display:none;align-items:center;justify-content:center;width:44px;height:44px;background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);color:var(--ink);font-size:17px;}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand);}
.nav-backdrop{position:fixed;inset:0;background:rgba(15,27,48,.32);opacity:0;pointer-events:none;transition:opacity .22s ease;z-index:55;}
.nav-backdrop.is-open{opacity:1;pointer-events:auto;}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border:1px solid transparent;border-radius:var(--r-sm);font-size:15.5px;font-weight:600;text-decoration:none;white-space:nowrap;transition:background .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;}
.btn-sm{height:42px;padding:0 18px;font-size:14.5px;}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(255,107,44,.24);}
.btn-primary:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);}
.btn-outline{background:#fff;border-color:var(--brand);color:var(--brand);}
.btn-outline:hover{background:rgba(22,87,214,.08);color:var(--brand-dark);transform:translateY(-1px);}
.btn-ghost{background:var(--brand-light);color:var(--brand-dark);}
.btn-ghost:hover{background:#dbe7fd;color:var(--brand-dark);}
.btn-icon{width:48px;height:48px;padding:0;border-radius:var(--r-sm);background:#fff;border:1px solid var(--line);color:var(--ink-2);}
.btn-icon:hover{border-color:var(--brand);color:var(--brand);}
.btn-icon.is-done{color:var(--brand);border-color:var(--brand);}

/* ---------- breadcrumb ---------- */
.crumbs{padding:22px 0 0;font-size:13px;color:var(--ink-3);}
.crumbs a{color:var(--ink-3);}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{margin:0 8px;color:#C7D2E3;}
.crumbs .current{color:var(--brand);font-weight:600;}

/* ---------- banner ---------- */
.cat-banner{padding:18px 0 0;}
.banner-card{position:relative;display:grid;grid-template-columns:1.35fr .95fr;gap:36px;align-items:center;background:var(--brand-light);border-radius:var(--r-lg);padding:42px 44px;overflow:hidden;}
.banner-card::after{content:"";position:absolute;right:-70px;top:-90px;width:280px;height:280px;border-radius:50%;background:rgba(22,87,214,.07);pointer-events:none;}
.banner-copy{position:relative;z-index:2;}
.eyebrow{display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:var(--r-pill);background:var(--brand);color:#fff;font-size:12.5px;font-weight:500;letter-spacing:.4px;}
.banner-copy h1{margin:16px 0 14px;font-size:40px;line-height:1.28;}
.banner-copy .lead{font-size:16px;line-height:1.8;color:var(--ink-2);max-width:560px;}
.banner-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.banner-figure{position:relative;z-index:1;}
.banner-figure img{width:100%;height:212px;object-fit:cover;border-radius:var(--r-md);border:1px solid rgba(22,87,214,.12);}

/* ---------- sections ---------- */
.section{padding:88px 0 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;}
.section-head h2{font-size:30px;}
.section-head .sub{margin-top:8px;font-size:15px;color:var(--ink-2);}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--brand);white-space:nowrap;}
.text-link:hover{color:var(--accent);}
.text-link i{font-size:12px;transition:transform .2s ease;}
.text-link:hover i{transform:translateX(3px);}

/* ---------- card grid ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.play-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);transition:transform .25s ease,box-shadow .25s ease;}
.play-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.play-card:hover h3{color:var(--brand);}
.play-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--brand-light);}
.play-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.play-card:hover .thumb img{transform:scale(1.03);}
.play-card .body{display:flex;flex-direction:column;gap:10px;flex:1;padding:20px 22px 24px;}
.play-card h3{font-size:19px;font-weight:600;transition:color .2s ease;}
.play-card p{font-size:15px;line-height:1.7;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.tag{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);font-size:12.5px;font-weight:500;background:var(--accent-light);color:#B0400F;}
.tag.is-blue{background:var(--brand-light);color:var(--brand-dark);}
.card-meta{display:flex;align-items:center;gap:10px;margin-top:auto;padding-top:4px;font-size:13px;color:var(--ink-3);}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.step{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:24px 22px;box-shadow:var(--sh-1);transition:transform .25s ease,box-shadow .25s ease;}
.step:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.step::before{content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;border-radius:3px;background:var(--brand);}
.step:hover::before{background:var(--accent);}
.step-num{font-family:var(--font-num);font-size:26px;font-weight:700;color:var(--brand);line-height:1;letter-spacing:.5px;}
.step h3{margin:14px 0 8px;font-size:18px;font-weight:600;}
.step p{font-size:14.5px;line-height:1.75;color:var(--ink-2);}

/* ---------- metric panel ---------- */
.metric-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:6px 30px;box-shadow:var(--sh-1);}
.metric-row{display:grid;grid-template-columns:200px 1fr;gap:24px;align-items:start;padding:22px 0;border-bottom:1px solid var(--line);}
.metric-row:last-child{border-bottom:0;}
.metric-name{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:600;color:var(--ink);}
.metric-name i{color:var(--brand);font-size:14px;}
.metric-desc{font-size:15px;line-height:1.8;color:var(--ink-2);}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--sh-1);overflow:hidden;transition:box-shadow .2s ease,border-color .2s ease;}
.faq-item:hover{box-shadow:var(--sh-2);}
.faq-item.is-open{border-color:#CDDCF8;}
.faq-q{display:flex;align-items:center;gap:14px;width:100%;padding:18px 22px;background:none;border:0;font-size:17px;font-weight:600;color:var(--ink);text-align:left;}
.faq-q .idx{font-family:var(--font-num);font-size:13px;font-weight:700;color:var(--brand);flex:0 0 auto;}
.faq-q .icon{margin-left:auto;flex:0 0 auto;width:24px;height:24px;display:inline-flex;align-items:center;justify-content:center;border-radius:50%;background:var(--brand-light);color:var(--brand);font-size:11px;transition:transform .2s ease;}
.faq-item.is-open .faq-q .icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;}
.faq-a p{padding:0 22px 20px 60px;font-size:16px;line-height:1.8;color:var(--ink-2);}

/* ---------- CTA ---------- */
.cta-bar{display:flex;align-items:center;justify-content:space-between;gap:28px;background:var(--brand-light);border-radius:var(--r-lg);padding:30px 34px;}
.cta-bar h2{font-size:22px;}
.cta-bar .cta-note{margin-top:8px;font-size:15px;color:var(--ink-2);max-width:620px;}
.cta-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.back-row{display:flex;gap:24px;margin-top:26px;font-size:14.5px;font-weight:600;}

/* ---------- footer ---------- */
.site-footer{margin-top:88px;background:var(--footer-bg);color:rgba(255,255,255,.7);font-size:14px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:36px;padding:64px 0 40px;}
.footer-brand .brand-name{color:#fff;}
.footer-brand p{margin-top:16px;line-height:1.9;max-width:340px;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;}
.footer-col a,.footer-col span{display:block;line-height:2;color:rgba(255,255,255,.7);}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:22px 0 30px;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:rgba(255,255,255,.55);}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .banner-card{grid-template-columns:1fr;padding:34px 30px;gap:26px;}
  .banner-copy h1{font-size:32px;}
  .banner-figure img{height:190px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .section{padding:64px 0 0;}
  .section-head h2{font-size:26px;}
  .metric-panel{padding:6px 22px;}
  .metric-row{grid-template-columns:170px 1fr;gap:18px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:52px 0 34px;}
}
@media (max-width:900px){
  .header-inner{height:56px;gap:12px;}
  .brand-icon{width:32px;height:32px;flex:0 0 32px;}
  .brand-name{font-size:17px;}
  .nav-toggle{display:inline-flex;}
  .header-actions .search-box,
  .header-actions > .btn-primary{display:none;}
  .mobile-extra{display:flex;}
  .main-nav{position:absolute;top:100%;left:0;right:0;display:flex;flex-direction:column;align-items:stretch;gap:0;margin:0;padding:6px 16px 20px;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--sh-2);opacity:0;transform:translateY(-10px);pointer-events:none;transition:opacity .22s ease,transform .22s ease;}
  .main-nav.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
  .nav-link{height:52px;padding:0 4px;font-size:16px;border-bottom:1px solid var(--line);}
  .nav-link.is-active::after{display:none;}
}
@media (max-width:640px){
  body{font-size:16px;}
  .container{padding:0 16px;}
  .crumbs{padding:16px 0 0;}
  .cat-banner{padding:14px 0 0;}
  .banner-card{padding:26px 20px;border-radius:var(--r-md);}
  .banner-copy h1{font-size:27px;margin:14px 0 12px;}
  .banner-copy .lead{font-size:15px;}
  .banner-actions{gap:10px;margin-top:20px;}
  .banner-actions .btn{flex:1 1 100%;min-height:44px;}
  .banner-figure img{height:164px;}
  .section{padding:44px 0 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;margin-bottom:22px;}
  .section-head h2{font-size:24px;}
  .card-grid{grid-template-columns:1fr;gap:18px;}
  .steps{grid-template-columns:1fr;gap:14px;}
  .metric-panel{padding:4px 18px;border-radius:var(--r-md);}
  .metric-row{grid-template-columns:1fr;gap:6px;padding:18px 0;}
  .faq-q{padding:16px 18px;font-size:16px;}
  .faq-a p{padding:0 18px 18px 18px;}
  .cta-bar{flex-direction:column;align-items:flex-start;padding:24px 20px;gap:20px;}
  .cta-actions{flex-direction:column;width:100%;}
  .cta-actions .btn{width:100%;min-height:44px;}
  .cta-actions .btn-icon{width:100%;}
  .back-row{flex-direction:column;gap:10px;}
  .site-footer{margin-top:44px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;padding:40px 0 26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
}