/* roulang page: index */
:root{
  --primary:#1F5E8C;
  --primary-dark:#16456A;
  --primary-light:#D9EAF7;
  --primary-mist:#EEF5FB;
  --accent:#E0A84B;
  --accent-soft:#F7E8C8;
  --success:#2F8F6B;
  --danger:#C24C4C;
  --bg:#F6F9FC;
  --surface:#FFFFFF;
  --ink:#111827;
  --muted:#5D6B7A;
  --border:#DCE5EE;
  --radius-card:18px;
  --radius-btn:12px;
  --shadow-card:0 12px 30px rgba(22,69,106,.08);
  --shadow-hover:0 16px 40px rgba(22,69,106,.14);
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--primary-dark);}
button{font-family:inherit;cursor:pointer;border:none;background:none;}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--ink);letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px;}
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--primary);background:var(--primary-light);
  padding:6px 14px;border-radius:999px;line-height:1.4;
}
.section-title{font-size:34px;line-height:1.25;margin:18px 0 12px;}
.section-sub{font-size:16px;color:var(--muted);max-width:720px;}
.card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--primary-light);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15.5px;font-weight:600;line-height:1;white-space:nowrap;
  transition:background .2s ease,color .2s ease,transform .12s ease,box-shadow .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);color:#fff;}
.btn-primary:active{transform:translateY(1px);}
.btn-accent{background:var(--accent);color:#2A1F07;}
.btn-accent:hover{background:#D19A3C;color:#2A1F07;}
.btn-ghost{background:#fff;border:1px solid var(--border);color:var(--primary);}
.btn-ghost:hover{background:var(--primary-mist);color:var(--primary-dark);}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  height:40px;padding:0 18px;border-radius:999px;
  font-size:14.5px;font-weight:600;color:var(--muted);
  background:#fff;border:1px solid var(--border);
  white-space:nowrap;transition:all .2s ease;
}
.chip:hover{color:var(--primary);border-color:var(--primary-light);background:var(--primary-mist);}
.chip.is-active{background:var(--primary-light);color:var(--primary);border-color:var(--primary-light);box-shadow:inset 0 -2px 0 var(--primary);}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:600;padding:4px 11px;border-radius:999px;
  background:var(--primary-mist);color:var(--primary);line-height:1.5;
}
.badge-accent{background:var(--accent-soft);color:#8A5F14;}
.badge-success{background:#E4F3EC;color:#1F6B4F;}
.tag-cat{font-size:12.5px;font-weight:600;color:var(--primary);background:var(--primary-light);padding:3px 10px;border-radius:999px;}
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--border);}
.nav-inner{display:flex;align-items:center;gap:24px;height:68px;}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;color:var(--ink);}
.logo:hover{color:var(--ink);}
.logo-mark{
  width:38px;height:38px;border-radius:11px;flex-shrink:0;
  background:linear-gradient(150deg,var(--primary) 0%,var(--primary-dark) 100%);
  display:flex;align-items:center;justify-content:center;
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text b{font-size:15.5px;font-weight:700;letter-spacing:.01em;}
.logo-text span{font-size:11.5px;color:var(--muted);font-weight:500;letter-spacing:.08em;}
.nav-chips{display:flex;align-items:center;gap:8px;flex:1;overflow-x:auto;scrollbar-width:none;}
.nav-chips::-webkit-scrollbar{display:none;}
.nav-cta{flex-shrink:0;}
.menu-btn{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--border);align-items:center;justify-content:center;background:#fff;}
.mobile-panel{display:none;border-top:1px solid var(--border);background:#fff;padding:16px 0 20px;}
.mobile-panel.open{display:block;}
.mobile-panel .chip{width:100%;justify-content:flex-start;height:46px;}
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%);
  border-bottom:1px solid var(--border);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(circle,rgba(31,94,140,.5) 1px,transparent 1px);
  background-size:26px 26px;opacity:.05;pointer-events:none;
}
.hero-inner{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;padding:84px 0 76px;}
.hero h1{font-size:52px;line-height:1.15;font-weight:700;margin:20px 0 20px;}
.hero-sub{font-size:17px;color:var(--muted);line-height:1.85;max-width:600px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px;}
.hero-marks{display:flex;gap:22px;flex-wrap:wrap;margin-top:36px;padding-top:26px;border-top:1px dashed var(--border);}
.hero-mark{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--muted);}
.mark-dot{width:8px;height:8px;border-radius:50%;background:var(--success);flex-shrink:0;}
.hero-visual{position:relative;}
.hero-photo{
  position:relative;border-radius:24px;overflow:hidden;
  aspect-ratio:4/3;background:var(--primary-mist);
  box-shadow:0 20px 50px rgba(22,69,106,.14);
}
.hero-photo img{width:100%;height:100%;object-fit:cover;}
.hero-photo::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(238,245,251,.30) 0%,rgba(31,94,140,.22) 100%);
}
.hero-card{
  position:absolute;left:-18px;bottom:-26px;width:290px;
  background:#fff;border:1px solid var(--border);border-radius:18px;
  box-shadow:0 18px 44px rgba(22,69,106,.16);padding:18px;z-index:2;
}
.hero-card h4{font-size:14px;color:var(--muted);font-weight:600;letter-spacing:.02em;}
.hero-card a{
  display:flex;align-items:center;justify-content:space-between;
  padding:11px 12px;border-radius:12px;font-size:14.5px;font-weight:600;
  color:var(--ink);margin-top:8px;background:var(--primary-mist);
  transition:background .2s ease,color .2s ease;
}
.hero-card a:hover{background:var(--primary-light);color:var(--primary-dark);}
.chipbar{background:#fff;border-bottom:1px solid var(--border);}
.chipbar-scroll{display:flex;gap:10px;overflow-x:auto;padding:18px 0;scrollbar-width:none;}
.chipbar-scroll::-webkit-scrollbar{display:none;}
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:24px;}
.bento-lg{grid-column:span 3;}
.bento-sm{grid-column:span 3;}
.bento-xs{grid-column:span 3;}
@media(min-width:1024px){
  .bento-lg{grid-column:span 3;}
  .bento-xs{grid-column:span 1.5;}
}
.bento-card{overflow:hidden;display:flex;flex-direction:column;height:100%;}
.bento-cover{aspect-ratio:16/10;overflow:hidden;background:var(--primary-mist);}
.bento-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.bento-card:hover .bento-cover img{transform:scale(1.04);}
.bento-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.bento-body h3{font-size:21px;line-height:1.4;}
.bento-body p{font-size:15px;color:var(--muted);line-height:1.75;}
.bento-link{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;margin-top:auto;padding-top:6px;}
.bento-icon{
  width:44px;height:44px;border-radius:13px;background:var(--primary-mist);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.quote-wrap{position:relative;}
.quote-scroll{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 2px 22px;scrollbar-width:none;
}
.quote-scroll::-webkit-scrollbar{display:none;}
.quote-card{
  flex:0 0 calc((100% - 48px)/3);scroll-snap-align:start;
  background:#fff;border:1px solid var(--border);border-radius:18px;
  padding:26px;box-shadow:var(--shadow-card);
}
.quote-head{display:flex;align-items:center;gap:12px;}
.avatar{
  width:44px;height:44px;border-radius:50%;background:var(--primary-light);
  color:var(--primary-dark);display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:15px;flex-shrink:0;
}
.stars{color:var(--accent);font-size:14px;letter-spacing:2px;}
.quote-scroll-btns{display:flex;gap:10px;}
.scroll-btn{
  width:44px;height:44px;border-radius:50%;background:#fff;
  border:1px solid var(--border);display:flex;align-items:center;justify-content:center;
  color:var(--primary);transition:background .2s ease,color .2s ease;
}
.scroll-btn:hover{background:var(--primary-light);color:var(--primary-dark);}
.guard{background:var(--primary-mist);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.guard-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.guard-item{display:flex;gap:14px;align-items:flex-start;}
.guard-icon{
  width:42px;height:42px;border-radius:12px;background:#fff;border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--primary);
}
.news-grid{display:grid;grid-template-columns:5fr 7fr;gap:28px;align-items:start;}
.news-feature{overflow:hidden;display:flex;flex-direction:column;}
.news-list{display:flex;flex-direction:column;gap:14px;}
.news-item{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:#fff;border:1px solid var(--border);border-radius:14px;
  padding:18px 20px;transition:all .2s ease;
}
.news-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-card);border-color:var(--primary-light);}
.news-item h4{font-size:16px;font-weight:600;line-height:1.55;}
.empty-box{
  background:#fff;border:1px dashed var(--border);border-radius:18px;
  padding:46px 24px;text-align:center;color:var(--muted);
}
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start;}
.faq-item{border-bottom:1px solid var(--border);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:60px;padding:16px 18px;border-radius:12px;
  font-size:16.5px;font-weight:600;color:var(--ink);text-align:left;
  transition:background .2s ease;
}
.faq-q:hover{background:var(--primary-mist);}
.faq-item.open .faq-q{background:var(--primary-mist);}
.faq-sign{
  width:26px;height:26px;border-radius:50%;background:var(--primary-light);
  color:var(--primary-dark);display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:700;flex-shrink:0;line-height:1;
}
.faq-a{display:none;padding:6px 18px 22px;max-width:760px;font-size:16px;line-height:1.85;color:var(--muted);}
.faq-item.open .faq-a{display:block;}
.cta-band{background:var(--primary-mist);border-top:1px solid var(--border);}
.cta-card{
  background:#fff;border:1px solid var(--border);border-radius:24px;
  padding:56px 40px;text-align:center;box-shadow:var(--shadow-card);
  position:relative;overflow:hidden;
}
.cta-card::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(circle,rgba(31,94,140,.55) 1px,transparent 1px);
  background-size:24px 24px;opacity:.05;pointer-events:none;
}
.site-footer{background:#0E2A42;color:#fff;position:relative;overflow:hidden;}
.site-footer::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(circle,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:28px 28px;opacity:.03;pointer-events:none;
}
.footer-grid{position:relative;display:grid;grid-template-columns:4fr 2.5fr 2.5fr 3fr;gap:38px;padding:64px 0 40px;}
.footer-title{font-size:14.5px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.04em;}
.footer-link{display:block;font-size:14.5px;color:rgba(255,255,255,.78);padding:5px 0;transition:color .2s ease;}
.footer-link:hover{color:#fff;text-decoration:underline;}
.footer-bottom{
  position:relative;border-top:1px solid rgba(255,255,255,.14);
  padding:20px 0 26px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.62);
}
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:50;
  width:46px;height:46px;border-radius:50%;background:#fff;border:1px solid var(--border);
  display:none;align-items:center;justify-content:center;color:var(--primary);
  box-shadow:var(--shadow-card);transition:background .2s ease,color .2s ease;
}
.to-top.show{display:flex;}
.to-top:hover{background:var(--primary);color:#fff;}
.num{font-variant-numeric:tabular-nums;}
@media(max-width:1024px){
  .container{padding:0 24px;}
  .hero-inner{grid-template-columns:1fr;gap:44px;padding:64px 0 60px;}
  .hero-visual{order:2;}
  .hero-card{position:static;width:100%;margin-top:18px;left:auto;bottom:auto;}
  .hero h1{font-size:40px;}
  .bento{grid-template-columns:repeat(2,1fr);}
  .bento-lg,.bento-sm,.bento-xs{grid-column:span 1;}
  .quote-card{flex:0 0 calc((100% - 24px)/2);}
  .guard-grid{grid-template-columns:repeat(2,1fr);}
  .news-grid{grid-template-columns:1fr;}
  .faq-grid{grid-template-columns:1fr;gap:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .nav-chips{display:none;}
  .menu-btn{display:flex;}
  .nav-inner{justify-content:space-between;}
  .nav-cta{display:none;}
}
@media(max-width:640px){
  body{font-size:16px;}
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .section-tight{padding:44px 0;}
  .hero h1{font-size:33px;}
  .section-title{font-size:25px;}
  .bento{grid-template-columns:1fr;gap:18px;}
  .quote-card{flex:0 0 84%;}
  .guard-grid{grid-template-columns:1fr 1fr;gap:18px;}
  .hero-actions .btn{width:100%;}
  .cta-card{padding:38px 20px;}
  .footer-grid{grid-template-columns:1fr;padding:44px 0 28px;}
  .to-top{right:16px;bottom:18px;}
}

/* roulang page: category1 */
:root{
  --primary:#1F5E8C;
  --primary-dark:#16456A;
  --primary-light:#D9EAF7;
  --primary-mist:#EEF5FB;
  --accent:#E0A84B;
  --accent-soft:#F7E8C8;
  --success:#2F8F6B;
  --danger:#C24C4C;
  --bg:#F6F9FC;
  --surface:#FFFFFF;
  --ink:#111827;
  --muted:#5D6B7A;
  --border:#DCE5EE;
  --radius-card:18px;
  --radius-btn:12px;
  --radius-img:16px;
  --shadow-sm:0 6px 18px rgba(22,69,106,.06);
  --shadow-card:0 12px 30px rgba(22,69,106,.08);
  --shadow-hover:0 16px 40px rgba(22,69,106,.14);
  --font-stack:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-stack);
  font-size:16.5px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease,opacity .18s ease;}
a:hover{color:var(--primary-dark);}
button{font-family:inherit;cursor:pointer;border:none;background:none;}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4{margin:0;letter-spacing:.2px;}
p{margin:0;}
::selection{background:var(--primary-light);color:var(--primary-dark);}
:focus-visible{outline:2px solid var(--primary-light);outline-offset:2px;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px;}
@media (max-width:1024px){.container{padding:0 24px;}}
@media (max-width:640px){.container{padding:0 16px;}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:#fff;
  border-bottom:1px solid var(--border);
  box-shadow:0 2px 10px rgba(22,69,106,.04);
}
.header-inner{display:flex;align-items:center;gap:20px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:38px;height:38px;border-radius:11px;
  background:var(--primary);
  display:grid;place-items:center;
  box-shadow:0 8px 18px rgba(31,94,140,.25);
  flex:0 0 auto;
}
.logo-text{display:flex;flex-direction:column;line-height:1.18;}
.logo-text b{font-size:15.5px;font-weight:700;color:var(--ink);}
.logo-text span{font-size:12.5px;color:var(--muted);letter-spacing:1px;}

.nav-chips{display:flex;align-items:center;gap:6px;margin:0 auto;}
.chip{
  display:inline-flex;align-items:center;
  padding:8px 15px;border-radius:999px;
  font-size:14.5px;color:var(--muted);
  border:1px solid transparent;
  white-space:nowrap;position:relative;
  transition:background-color .18s ease,color .18s ease;
}
.chip:hover{background:var(--primary-mist);color:var(--primary);}
.chip.is-active{background:var(--primary-light);color:var(--primary);font-weight:600;}
.chip.is-active::after{
  content:"";position:absolute;left:50%;bottom:3px;
  width:20px;height:2px;border-radius:2px;
  background:var(--primary);transform:translateX(-50%);
}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.menu-toggle{
  display:none;width:42px;height:42px;border-radius:11px;
  border:1px solid var(--border);background:#fff;
  align-items:center;justify-content:center;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--primary);border-radius:2px;position:relative;}
.menu-toggle span::before,.menu-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--primary);border-radius:2px;
}
.menu-toggle span::before{top:-6px;}
.menu-toggle span::after{top:6px;}

.mobile-panel{
  display:none;background:#fff;border-top:1px solid var(--border);
  padding:16px 0 22px;
}
.mobile-panel.is-open{display:block;}
.mobile-panel .mobile-nav{display:flex;flex-direction:column;gap:8px;margin-bottom:16px;}
.mobile-panel .chip{justify-content:flex-start;border-radius:12px;padding:12px 16px;background:var(--bg);}
.mobile-panel .chip.is-active{background:var(--primary-light);}
.mobile-panel .chip.is-active::after{display:none;}
.mobile-panel .btn{width:100%;}

@media (max-width:1023px){
  .nav-chips{display:none;}
  .header-actions .header-cta{display:none;}
  .menu-toggle{display:inline-flex;}
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15.5px;font-weight:600;line-height:1;
  border:1px solid transparent;
  transition:background-color .18s ease,color .18s ease,box-shadow .2s ease,transform .12s ease,border-color .18s ease;
}
.btn:active{transform:translateY(1px);}
.btn:focus-visible{outline:none;box-shadow:0 0 0 2px #fff,0 0 0 4px var(--primary-light);}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);color:#fff;}
.btn-accent{background:var(--accent);color:#2b1d05;}
.btn-accent:hover{background:#d29a3c;color:#2b1d05;}
.btn-ghost{background:#fff;border-color:var(--border);color:var(--primary);}
.btn-ghost:hover{background:var(--primary-mist);color:var(--primary-dark);}
.btn-sm{height:40px;padding:0 18px;font-size:14.5px;border-radius:10px;}
.btn-lg{height:52px;padding:0 30px;font-size:16px;}

.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:600;color:var(--primary);
}
.link-arrow::after{content:"→";transition:transform .18s ease;}
.link-arrow:hover{text-decoration:underline;}
.link-arrow:hover::after{transform:translateX(3px);}

/* ============ 页面头部 ============ */
.page-hero{
  position:relative;overflow:hidden;
  padding:52px 0 68px;
  background:linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(31,94,140,.16) 1px,transparent 1px);
  background-size:26px 26px;opacity:.28;pointer-events:none;
}
.page-hero .container{position:relative;z-index:1;}
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13.5px;color:var(--muted);margin-bottom:22px;
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{opacity:.5;}
.breadcrumb .current{color:var(--ink);font-weight:600;}
.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:52px;align-items:center;}
@media (max-width:1023px){
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .page-hero{padding:38px 0 52px;}
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.6px;
  color:var(--primary);background:var(--primary-light);
  padding:6px 14px;border-radius:999px;
}
.eyebrow::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 0 3px rgba(224,168,75,.22);
}
h1.page-title{
  font-size:clamp(28px,3.3vw,44px);
  line-height:1.2;font-weight:700;
  margin:18px 0 0;
}
h1.page-title em{font-style:normal;color:var(--primary);}
.hero-desc{
  margin-top:20px;font-size:16.5px;line-height:1.9;color:var(--muted);
  max-width:640px;
}
.hero-desc strong{color:var(--ink);font-weight:600;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-visual{position:relative;}
.hero-visual .visual-frame{
  position:relative;border-radius:24px;overflow:hidden;
  background:var(--primary-mist);
  box-shadow:var(--shadow-card);
}
.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.hero-visual .visual-frame::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(140deg,rgba(31,94,140,.20),rgba(246,249,252,.08));
}
.hero-badge{
  position:absolute;left:-12px;bottom:24px;
  background:#fff;border:1px solid var(--border);
  border-radius:14px;padding:14px 18px;
  box-shadow:var(--shadow-card);
  display:flex;align-items:center;gap:12px;
  max-width:270px;
}
.hero-badge .dot{
  width:34px;height:34px;border-radius:10px;flex:0 0 auto;
  background:var(--primary-mist);display:grid;place-items:center;
}
.hero-badge b{display:block;font-size:14px;color:var(--ink);}
.hero-badge span{display:block;font-size:12.5px;color:var(--muted);line-height:1.5;}
@media (max-width:640px){
  .hero-badge{left:10px;right:10px;bottom:12px;max-width:none;}
}

/* ============ 通用板块 ============ */
.section{padding:84px 0;}
.section-alt{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
@media (max-width:768px){.section{padding:56px 0;}}
.section-head{max-width:760px;}
.section-head h2{
  font-size:clamp(23px,2.6vw,34px);
  line-height:1.28;font-weight:700;margin-top:14px;
}
.section-head .section-sub{margin-top:14px;color:var(--muted);font-size:16px;line-height:1.85;}

/* ============ 数据卡 ============ */
.fact-row{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;margin-top:-32px;position:relative;z-index:2;
}
@media (max-width:900px){.fact-row{grid-template-columns:1fr;margin-top:32px;}}
.fact-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-card);padding:26px 26px 24px;
  box-shadow:var(--shadow-card);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.fact-card:hover{transform:translateY(-2px);border-color:var(--primary-light);box-shadow:var(--shadow-hover);}
.fact-top{display:flex;align-items:baseline;gap:10px;}
.fact-num{
  font-size:34px;font-weight:700;color:var(--primary);
  font-variant-numeric:tabular-nums;line-height:1;
}
.fact-label{font-size:14.5px;font-weight:600;color:var(--ink);}
.fact-card p{margin-top:12px;font-size:14.5px;line-height:1.8;color:var(--muted);}

/* ============ 时间线 ============ */
.timeline{list-style:none;position:relative;margin-top:44px;}
.timeline::before{
  content:"";position:absolute;left:27px;top:18px;bottom:18px;
  width:2px;background:var(--border);border-radius:2px;
}
.timeline-item{
  position:relative;display:grid;grid-template-columns:56px minmax(0,1fr);
  gap:26px;padding-bottom:26px;
}
.timeline-item:last-child{padding-bottom:0;}
.timeline-node{
  position:relative;z-index:1;
  width:56px;height:56px;border-radius:50%;
  background:#fff;border:2px solid var(--primary-light);
  display:grid;place-items:center;
  font-weight:700;font-size:15px;color:var(--primary);
  font-variant-numeric:tabular-nums;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.timeline-item:hover .timeline-node{background:var(--primary);border-color:var(--primary);color:#fff;}
.timeline-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-card);padding:26px 28px;
  box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.timeline-card:hover{transform:translateY(-2px);border-color:var(--primary-light);box-shadow:var(--shadow-hover);}
.timeline-card h3{font-size:19px;font-weight:600;line-height:1.4;}
.timeline-card p{margin-top:10px;font-size:15.5px;line-height:1.85;color:var(--muted);}
.timeline-card .card-foot{margin-top:16px;padding-top:16px;border-top:1px dashed var(--border);position:static;}
@media (max-width:640px){
  .timeline::before{left:19px;}
  .timeline-item{grid-template-columns:40px minmax(0,1fr);gap:16px;}
  .timeline-node{width:40px;height:40px;font-size:13px;}
  .timeline-card{padding:20px 18px;}
}

/* ============ 提示卡 ============ */
.tip-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-top:40px;}
@media (max-width:860px){.tip-grid{grid-template-columns:1fr;}}
.tip-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-card);padding:28px;
  box-shadow:var(--shadow-sm);position:relative;overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.tip-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;
  background:var(--primary);
}
.tip-card.is-warm::before{background:var(--accent);}
.tip-card:hover{transform:translateY(-2px);border-color:var(--primary-light);box-shadow:var(--shadow-hover);}
.tip-card h3{font-size:18px;font-weight:600;}
.tip-card p{margin-top:10px;font-size:15.5px;line-height:1.85;color:var(--muted);}
.tip-tag{
  display:inline-block;font-size:12.5px;font-weight:600;
  padding:4px 10px;border-radius:999px;margin-bottom:14px;
  background:var(--primary-mist);color:var(--primary);
}
.tip-card.is-warm .tip-tag{background:var(--accent-soft);color:#7a5410;}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:52px;align-items:start;}
@media (max-width:960px){.faq-grid{grid-template-columns:1fr;gap:28px;}}
.faq-list{border-top:1px solid var(--border);}
.faq-item{border-bottom:1px solid var(--border);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:62px;padding:14px 14px;cursor:pointer;list-style:none;
  font-size:16.5px;font-weight:600;color:var(--ink);
  border-radius:10px;
  transition:background-color .2s ease,color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{background:var(--primary-mist);}
.faq-item[open] summary{background:var(--primary-mist);color:var(--primary-dark);}
.faq-toggle{width:22px;height:22px;position:relative;flex:0 0 auto;}
.faq-toggle::before,.faq-toggle::after{
  content:"";position:absolute;background:var(--primary);border-radius:2px;
  transition:transform .22s ease,opacity .22s ease;
}
.faq-toggle::before{left:3px;right:3px;top:10px;height:2px;}
.faq-toggle::after{top:3px;bottom:3px;left:10px;width:2px;}
.faq-item[open] .faq-toggle::after{transform:scaleY(0);opacity:0;}
.faq-answer{padding:2px 14px 22px;max-width:760px;}
.faq-answer p{font-size:16px;line-height:1.8;color:var(--muted);}

/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--primary-mist);
  border-radius:24px;
  padding:60px 40px;
  text-align:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(31,94,140,.22) 1px,transparent 1px);
  background-size:22px 22px;opacity:.4;
}
.cta-band > *{position:relative;z-index:1;}
.cta-band h2{font-size:clamp(23px,2.6vw,32px);line-height:1.3;font-weight:700;}
.cta-band p{margin:16px auto 0;max-width:640px;color:var(--muted);font-size:16px;line-height:1.85;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:30px;}
@media (max-width:640px){.cta-band{padding:40px 20px;border-radius:20px;}}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;overflow:hidden;
  background:#0E2A42;color:#fff;margin-top:88px;
}
.site-footer::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:34px 34px;opacity:.05;pointer-events:none;
}
.site-footer .container{position:relative;z-index:1;}
.footer-grid{
  display:grid;grid-template-columns:1.7fr 1fr 1.1fr 1.4fr;
  gap:40px;padding:66px 0 44px;
}
@media (max-width:960px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 32px;}}
@media (max-width:600px){.footer-grid{grid-template-columns:1fr;gap:28px;}}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:14px;}
.footer-link{
  display:block;font-size:14.5px;line-height:2.05;
  color:rgba(255,255,255,.78);
}
.footer-link:hover{color:#fff;text-decoration:underline;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);
  padding:20px 0 26px;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(255,255,255,.62);
}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  background:#fff;border:1px solid var(--border);
  display:grid;place-items:center;
  box-shadow:var(--shadow-sm);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .22s ease,transform .22s ease,background-color .22s ease,visibility .22s;
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--primary);border-color:var(--primary);}
.to-top:hover svg{stroke:#fff;}
.to-top svg{stroke:var(--primary);transition:stroke .2s ease;}
@media (max-width:640px){.to-top{right:16px;bottom:18px;width:42px;height:42px;}}

/* roulang page: article */
:root{
  --primary:#1F5E8C;
  --primary-dark:#16456A;
  --primary-light:#D9EAF7;
  --primary-mist:#EEF5FB;
  --accent:#E0A84B;
  --accent-soft:#F7E8C8;
  --success:#2F8F6B;
  --success-soft:#E7F4EE;
  --danger:#C24C4C;
  --bg:#F6F9FC;
  --surface:#FFFFFF;
  --ink:#111827;
  --muted:#5D6B7A;
  --border:#DCE5EE;
  --radius-card:18px;
  --radius-btn:12px;
  --shadow-card:0 12px 30px rgba(22,69,106,.08);
  --shadow-hover:0 16px 40px rgba(22,69,106,.14);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--primary-light);outline-offset:2px;border-radius:8px}

body .container{
  width:100%;
  max-width:1280px;
  margin-inline:auto;
  padding-inline:32px;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--border);
  box-shadow:0 4px 18px rgba(22,69,106,.04);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:68px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:38px;height:38px;border-radius:11px;
  background:linear-gradient(140deg,var(--primary),var(--primary-dark));
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 6px 14px rgba(31,94,140,.28);
  position:relative;
}
.logo-mark::after{
  content:"";position:absolute;inset:0;border-radius:11px;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:9px 9px;opacity:.28;
}
.logo-text{display:flex;flex-direction:column;line-height:1.12}
.logo-text b{font-size:16px;font-weight:700;color:var(--primary-dark);letter-spacing:.2px}
.logo-text span{font-size:12.5px;color:var(--muted);letter-spacing:1.6px}

.nav-chips{
  display:flex;
  align-items:center;
  gap:6px;
  overflow-x:auto;
  scrollbar-width:none;
  padding:6px 2px;
  margin-inline:auto;
}
.nav-chips::-webkit-scrollbar{display:none}
.chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  white-space:nowrap;
  padding:8px 15px;
  border-radius:999px;
  font-size:14.5px;
  color:var(--muted);
  border:1px solid transparent;
  transition:all .22s var(--ease);
}
.chip:hover{background:var(--primary-mist);color:var(--primary)}
.chip.is-active{
  background:var(--primary-light);
  color:var(--primary);
  font-weight:600;
  box-shadow:inset 0 -2px 0 var(--primary);
}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.menu-toggle{
  display:none;
  width:44px;height:44px;border-radius:12px;
  border:1px solid var(--border);background:var(--surface);
  align-items:center;justify-content:center;
}
.menu-toggle:hover{background:var(--primary-mist);border-color:var(--primary-light)}
.mobile-panel{display:none;border-top:1px solid var(--border);background:var(--surface);padding:14px 0 18px}
.mobile-panel.is-open{display:block}
.mobile-panel .nav-chips{flex-direction:column;align-items:stretch;margin:0 0 12px;padding:0}
.mobile-panel .chip{justify-content:flex-start;border-radius:12px;padding:12px 14px;border-color:var(--border)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15.5px;font-weight:600;letter-spacing:.2px;
  border:1px solid transparent;cursor:pointer;
  transition:all .22s var(--ease);
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(31,94,140,.22)}
.btn-primary:hover{background:var(--primary-dark);box-shadow:0 12px 26px rgba(22,69,106,.28)}
.btn-primary:active{transform:translateY(1px)}
.btn-accent{background:var(--accent);color:#26211A;box-shadow:0 8px 20px rgba(224,168,75,.26)}
.btn-accent:hover{background:#D2963A}
.btn-accent:active{transform:translateY(1px)}
.btn-ghost{background:var(--surface);border-color:var(--border);color:var(--primary)}
.btn-ghost:hover{background:var(--primary-mist);border-color:var(--primary-light)}
.btn-text{color:var(--primary);font-weight:600;font-size:15px;display:inline-flex;align-items:center;gap:6px}
.btn-text:hover{text-decoration:underline}
.btn-sm{height:42px;padding:0 18px;font-size:14.5px;border-radius:11px}

/* ---------- breadcrumb ---------- */
.crumb-bar{background:var(--surface);border-bottom:1px solid var(--border)}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:14px 0;font-size:13.5px;color:var(--muted);
}
.crumb a:hover{color:var(--primary);text-decoration:underline}
.crumb .sep{color:#B8C6D4}
.crumb .current{color:var(--ink);font-weight:600;max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- page shell ---------- */
.page{padding:44px 0 0}
.layout{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:32px;align-items:start}

/* ---------- article ---------- */
.article-head{padding-bottom:22px;border-bottom:1px solid var(--border)}
.article-cat{
  display:inline-flex;align-items:center;gap:7px;
  background:var(--primary-mist);color:var(--primary);
  border:1px solid var(--primary-light);
  padding:5px 13px;border-radius:999px;font-size:13px;font-weight:600;
}
.article-head h1{
  margin-top:16px;
  font-size:clamp(28px,3.6vw,42px);
  line-height:1.22;
  font-weight:700;
  letter-spacing:.2px;
}
.article-lead{margin-top:14px;color:var(--muted);font-size:16.5px;line-height:1.8;max-width:70ch}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  margin-top:20px;font-size:13.5px;color:var(--muted);
  font-variant-numeric:tabular-nums;
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C3D2DF}
.article-meta strong{color:var(--ink);font-weight:600}

.article-cover{
  margin-top:26px;border-radius:18px;overflow:hidden;
  border:1px solid var(--border);background:var(--primary-mist);
  box-shadow:var(--shadow-card);
}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}
.article-cover figcaption{font-size:13px;color:var(--muted);padding:10px 16px;background:var(--surface)}

.article-shell{
  margin-top:28px;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  padding:38px 40px 44px;
}
.article-body{max-width:820px;font-size:17px;line-height:1.9;color:#1B2430}
.article-body > * + *{margin-top:1.15em}
.article-body h2{
  font-size:24px;line-height:1.35;font-weight:700;color:var(--ink);
  margin-top:2em;padding-left:14px;border-left:4px solid var(--primary);
}
.article-body h3{font-size:20px;line-height:1.4;font-weight:600;margin-top:1.7em;color:var(--primary-dark)}
.article-body h4{font-size:17.5px;font-weight:600;margin-top:1.5em}
.article-body p{margin-top:1.15em}
.article-body ul,.article-body ol{margin-top:1.1em;padding-left:1.35em}
.article-body li{margin-top:.55em;line-height:1.85}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body a{color:var(--primary);font-weight:600}
.article-body a:hover{text-decoration:underline}
.article-body blockquote{
  margin-top:1.5em;padding:16px 20px;border-left:4px solid var(--primary);
  background:var(--primary-mist);border-radius:0 12px 12px 0;color:#243447;
}
.article-body img{border-radius:14px;margin-top:1.6em;width:100%}
.article-body figure figcaption{font-size:13px;color:var(--muted);margin-top:.6em;text-align:center}
.article-body table{width:100%;display:block;overflow-x:auto;border-collapse:collapse;margin-top:1.6em;font-size:15.5px}
.article-body th,.article-body td{border:1px solid var(--border);padding:11px 14px;text-align:left}
.article-body th{background:var(--primary-mist);font-weight:600}
.article-body code{
  background:var(--primary-mist);padding:2px 7px;border-radius:6px;
  font-size:15px;font-family:"SFMono-Regular",Consolas,monospace;
}
.article-body hr{border:0;border-top:1px solid var(--border);margin:2.2em 0}

.article-foot{
  margin-top:34px;padding-top:22px;border-top:1px solid var(--border);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  font-size:13px;color:var(--muted);background:var(--bg);
  border:1px solid var(--border);border-radius:999px;padding:5px 12px;
}
.tag:hover{color:var(--primary);border-color:var(--primary-light);background:var(--primary-mist)}

/* ---------- sidebar ---------- */
.sidebar{position:sticky;top:92px;display:flex;flex-direction:column;gap:20px}
.side-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:22px;
}
.side-card h3{font-size:17.5px;font-weight:700;margin-bottom:14px}
.side-list{display:flex;flex-direction:column;gap:12px}
.side-list a{
  display:flex;gap:12px;align-items:flex-start;
  padding:10px;border-radius:14px;border:1px solid transparent;
  transition:all .22s var(--ease);
}
.side-list a:hover{background:var(--primary-mist);border-color:var(--primary-light)}
.side-list .thumb{
  width:74px;flex:0 0 74px;aspect-ratio:16/10;border-radius:11px;overflow:hidden;
  background:var(--primary-mist);
}
.side-list .thumb img{width:100%;height:100%;object-fit:cover}
.side-list .txt b{display:block;font-size:14.5px;font-weight:600;line-height:1.55;color:var(--ink)}
.side-list .txt span{display:block;font-size:12.5px;color:var(--muted);margin-top:4px}

.safety-card{background:var(--primary-mist);border-color:#CFE2F2}
.safety-card ul{display:flex;flex-direction:column;gap:12px}
.safety-card li{display:flex;gap:10px;font-size:14.5px;line-height:1.7;color:#26374A}
.bullet{
  width:20px;height:20px;flex:0 0 20px;border-radius:50%;margin-top:3px;
  background:var(--primary);color:#fff;display:inline-flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;
}
.side-cta{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:22px;
}
.side-cta p{font-size:14.5px;color:var(--muted);line-height:1.75;margin-bottom:14px}
.side-cta .btn{width:100%}
.side-cta .btn + .btn{margin-top:10px}

/* ---------- related ---------- */
.related{margin-top:64px}
.related-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px}
.related-head h2{font-size:clamp(22px,2.4vw,28px);font-weight:700}
.related-head p{color:var(--muted);font-size:14.5px;margin-top:6px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.rel-card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.rel-card:hover{transform:translateY(-2px);border-color:var(--primary-light);box-shadow:var(--shadow-hover)}
.rel-card .cover{aspect-ratio:16/10;background:var(--primary-mist);overflow:hidden}
.rel-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.rel-card:hover .cover img{transform:scale(1.03)}
.rel-card .body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px;flex:1}
.rel-card .body h3{font-size:17px;font-weight:600;line-height:1.5}
.rel-card .body p{font-size:14.5px;color:var(--muted);line-height:1.7}
.rel-card .foot{margin-top:auto;padding-top:10px;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted)}

/* ---------- back nav ---------- */
.back-row{
  margin-top:34px;display:flex;flex-wrap:wrap;gap:12px;
  align-items:center;justify-content:space-between;
  padding:18px 22px;background:var(--surface);
  border:1px solid var(--border);border-radius:16px;
}
.back-row .links{display:flex;flex-wrap:wrap;gap:18px}
.back-row .links a{font-size:14.5px;color:var(--primary);font-weight:600}
.back-row .links a:hover{text-decoration:underline}
.back-row .pager{font-size:13.5px;color:var(--muted)}

/* ---------- cta band ---------- */
.cta-band{
  margin-top:64px;background:var(--primary-mist);
  border:1px solid #D2E4F3;border-radius:24px;
  padding:52px 40px;text-align:center;position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(31,94,140,.5) 1px,transparent 1px);
  background-size:26px 26px;opacity:.06;pointer-events:none;
}
.cta-band h2{font-size:clamp(24px,2.8vw,32px);font-weight:700;position:relative}
.cta-band p{
  margin:14px auto 0;max-width:640px;color:#3A4E62;font-size:16px;line-height:1.8;position:relative;
}
.cta-actions{margin-top:26px;display:flex;flex-wrap:wrap;gap:14px;justify-content:center;position:relative}

/* ---------- empty state ---------- */
.empty{
  background:var(--surface);border:1px dashed var(--border);
  border-radius:var(--radius-card);padding:56px 28px;text-align:center;
  box-shadow:var(--shadow-card);
}
.empty h3{font-size:20px;font-weight:700;margin-bottom:10px}
.empty p{color:var(--muted);font-size:15.5px;margin-bottom:22px}

/* ---------- footer ---------- */
.site-footer{
  margin-top:88px;background:#0E2A42;color:#fff;position:relative;overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.55) 1px,transparent 1px);
  background-size:30px 30px;opacity:.04;pointer-events:none;
}
.site-footer .container{position:relative;z-index:1}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:32px;
  padding:60px 0 44px;
}
.footer-title{font-size:14.5px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.4px}
.footer-link{display:block;font-size:14.5px;color:rgba(255,255,255,.78);margin-bottom:10px}
.footer-link:hover{color:#fff;text-decoration:underline}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);padding:20px 0 28px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13.5px;color:rgba(255,255,255,.62);
}

/* ---------- back to top ---------- */
.to-top{
  position:fixed;right:22px;bottom:26px;z-index:50;
  width:46px;height:46px;border-radius:50%;
  background:var(--surface);border:1px solid var(--border);
  box-shadow:0 10px 24px rgba(22,69,106,.16);
  display:inline-flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transition:all .25s var(--ease);
}
.to-top.is-show{opacity:1;visibility:visible}
.to-top:hover{background:var(--primary);border-color:var(--primary)}
.to-top:hover svg{stroke:#fff}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  body .container{padding-inline:24px}
  .nav-chips{display:none}
  .menu-toggle{display:inline-flex}
  .header-actions .btn-primary{display:none}
  .layout{grid-template-columns:1fr;gap:28px}
  .sidebar{position:static}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .article-shell{padding:30px 26px 34px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:48px 0 34px}
}
@media (max-width:768px){
  .article-head h1{font-size:30px}
  .article-meta{gap:8px 14px}
  .related-grid{grid-template-columns:1fr}
  .cta-band{padding:40px 22px}
  .back-row{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  body .container{padding-inline:16px}
  .page{padding-top:28px}
  .article-shell{padding:22px 18px 28px;border-radius:16px}
  .article-body{font-size:16.5px}
  .article-body h2{font-size:21px}
  .article-body h3{font-size:18.5px}
  .footer-grid{grid-template-columns:1fr;padding:40px 0 28px}
  .btn{width:100%;padding:0 18px}
  .cta-actions .btn,.mobile-panel .btn{width:100%}
  .to-top{right:14px;bottom:18px}
}

/* roulang page: category2 */
:root{
  --primary:#1F5E8C;
  --primary-dark:#16456A;
  --primary-light:#D9EAF7;
  --primary-mist:#EEF5FB;
  --accent:#E0A84B;
  --accent-soft:#F7E8C8;
  --success:#2F8F6B;
  --success-soft:#E6F4EE;
  --danger:#C24C4C;
  --bg:#F6F9FC;
  --surface:#FFFFFF;
  --ink:#111827;
  --muted:#5D6B7A;
  --border:#DCE5EE;
  --radius-card:18px;
  --radius-btn:12px;
  --shadow-card:0 12px 30px rgba(22,69,106,.08);
  --shadow-card-hover:0 16px 40px rgba(22,69,106,.14);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body.site-body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--primary-dark);}
button{font-family:inherit;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:var(--surface);
  border-bottom:1px solid var(--border);
}
.header-inner{display:flex;align-items:center;gap:18px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{
  width:38px;height:38px;border-radius:12px;background:var(--primary);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text b{font-size:15.5px;font-weight:700;color:var(--ink);letter-spacing:.01em;}
.logo-text span{font-size:12.5px;color:var(--muted);letter-spacing:.14em;}
.nav-chips{display:flex;align-items:center;gap:6px;margin-left:auto;}
.chip{
  display:inline-flex;align-items:center;height:38px;padding:0 16px;border-radius:999px;
  font-size:14.5px;color:var(--muted);border:1px solid transparent;white-space:nowrap;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.chip:hover{background:var(--primary-mist);color:var(--primary);}
.chip.is-active{
  background:var(--primary-light);color:var(--primary);font-weight:600;
  box-shadow:inset 0 -2px 0 var(--primary);
}
.header-cta{flex-shrink:0;}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--border);background:var(--surface);
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle:hover{background:var(--primary-mist);}
.mobile-panel{display:none;border-top:1px solid var(--border);background:var(--surface);}
.mobile-panel.is-open{display:block;}
.mobile-panel .inner{padding:16px 0 24px;display:flex;flex-direction:column;gap:8px;}
.mobile-panel .chip{height:44px;justify-content:flex-start;border-radius:12px;}
.mobile-panel .btn{width:100%;margin-top:8px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15.5px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .12s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.btn-sm{height:40px;padding:0 18px;font-size:14.5px;border-radius:10px;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);color:#fff;}
.btn-primary:active{transform:translateY(1px);}
.btn-primary:focus-visible{outline:none;box-shadow:0 0 0 2px #fff,0 0 0 4px var(--primary-light);}
.btn-secondary{background:var(--surface);border-color:var(--border);color:var(--primary);}
.btn-secondary:hover{background:var(--primary-mist);border-color:var(--primary-light);color:var(--primary-dark);}
.btn-secondary:focus-visible{outline:none;box-shadow:0 0 0 2px var(--primary-light);}
.btn-accent{background:var(--accent);color:#3A2A0B;}
.btn-accent:hover{background:#D2963A;color:#3A2A0B;}
.btn-ghost{background:transparent;border-color:var(--border);color:var(--primary);}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}

/* ---------- page hero ---------- */
.page-hero{padding:56px 0 64px;background:var(--surface);border-bottom:1px solid var(--border);position:relative;overflow:hidden;}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(31,94,140,.16) 1px,transparent 1px);
  background-size:26px 26px;opacity:.4;
  mask-image:linear-gradient(120deg,rgba(0,0,0,.9),transparent 62%);
  -webkit-mask-image:linear-gradient(120deg,rgba(0,0,0,.9),transparent 62%);
}
.page-hero-grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:18px;}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--primary);text-decoration:underline;}
.breadcrumb .sep{opacity:.55;}
.breadcrumb .current{color:var(--ink);font-weight:600;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:999px;
  background:var(--primary-mist);color:var(--primary);font-size:13px;font-weight:600;letter-spacing:.04em;
  margin-bottom:18px;
}
.page-title{
  font-size:50px;line-height:1.15;font-weight:700;letter-spacing:-.01em;
  margin:0 0 20px;color:var(--ink);
}
.page-title .split{display:block;color:var(--primary);}
.lead{font-size:17px;line-height:1.8;color:var(--muted);max-width:620px;margin:0;}
.hero-facts{list-style:none;display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 0;padding:0;}
.hero-facts li{
  display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--primary-dark);
  background:var(--primary-mist);border:1px solid var(--primary-light);
  padding:7px 14px;border-radius:999px;
}
.hero-facts li b{font-weight:600;color:var(--primary);}
.hero-visual{position:relative;border-radius:24px;overflow:hidden;background:var(--primary-mist);border:1px solid var(--border);box-shadow:var(--shadow-card);}
.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.hero-visual .veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,.28),rgba(22,69,106,.34));}
.hero-badge{
  position:absolute;left:18px;bottom:18px;right:18px;
  background:rgba(255,255,255,.94);border-radius:14px;padding:14px 16px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  box-shadow:0 10px 24px rgba(22,69,106,.14);backdrop-filter:blur(2px);
}
.hero-badge .t{font-size:13px;color:var(--muted);}
.hero-badge .v{font-size:15px;font-weight:700;color:var(--primary-dark);font-variant-numeric:tabular-nums;}

/* ---------- sections ---------- */
.section{padding:84px 0;}
.section.alt{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.section-head{max-width:760px;margin-bottom:44px;}
.section-title{
  font-size:34px;line-height:1.25;font-weight:700;letter-spacing:-.01em;margin:0 0 14px;color:var(--ink);
}
.section-desc{font-size:16.5px;line-height:1.8;color:var(--muted);margin:0;}
.section-kicker{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--primary);
  text-transform:uppercase;margin-bottom:12px;
}

/* ---------- security layout ---------- */
.security-layout{display:grid;grid-template-columns:minmax(0,1fr) 348px;gap:32px;align-items:start;}
.security-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.sec-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:26px 24px;box-shadow:var(--shadow-card);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  display:flex;flex-direction:column;gap:14px;
}
.sec-card:hover{transform:translateY(-2px);border-color:var(--primary-light);box-shadow:var(--shadow-card-hover);}
.sec-icon{
  width:46px;height:46px;border-radius:14px;background:var(--primary-mist);
  display:flex;align-items:center;justify-content:center;color:var(--primary);flex-shrink:0;
}
.sec-card h3{font-size:22px;line-height:1.35;font-weight:600;margin:0;color:var(--ink);}
.sec-card p{font-size:15.5px;line-height:1.8;color:var(--muted);margin:0;}
.badge{
  display:inline-flex;align-items:center;gap:6px;align-self:flex-start;
  font-size:13px;font-weight:600;padding:5px 12px;border-radius:999px;
  background:var(--primary-mist);color:var(--primary);
}
.badge.warn{background:var(--accent-soft);color:#8A6117;}
.badge.ok{background:var(--success-soft);color:var(--success);}
.card-link{font-size:14.5px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px;margin-top:2px;}
.card-link:hover{text-decoration:underline;}
.security-aside{position:sticky;top:92px;}
.aside-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:26px 24px;
}
.aside-card h3{font-size:20px;font-weight:700;margin:0 0 16px;color:var(--ink);}
.aside-list{list-style:none;margin:0 0 22px;padding:0;display:flex;flex-direction:column;gap:14px;}
.aside-list li{display:flex;gap:10px;font-size:15px;line-height:1.75;color:var(--muted);}
.aside-list li span.dot{width:8px;height:8px;border-radius:50%;background:var(--accent);flex-shrink:0;margin-top:10px;}
.aside-note{
  margin-top:18px;padding-top:18px;border-top:1px dashed var(--border);
  font-size:13.5px;color:var(--muted);line-height:1.7;
}
.aside-card .btn{width:100%;}
.aside-card .text-link{display:block;text-align:center;margin-top:14px;font-size:14.5px;font-weight:600;}
.aside-card .text-link:hover{text-decoration:underline;}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;position:relative;}
.step-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:24px 22px;box-shadow:var(--shadow-card);position:relative;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.step-card:hover{transform:translateY(-2px);border-color:var(--primary-light);box-shadow:var(--shadow-card-hover);}
.step-num{
  width:36px;height:36px;border-radius:50%;background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;
  font-variant-numeric:tabular-nums;margin-bottom:16px;
}
.step-card h3{font-size:19px;font-weight:600;margin:0 0 10px;color:var(--ink);}
.step-card p{font-size:15px;line-height:1.75;color:var(--muted);margin:0;}

/* ---------- faq ---------- */
.faq-grid{display:grid;grid-template-columns:340px minmax(0,1fr);gap:48px;align-items:start;}
.faq-intro p{font-size:16px;line-height:1.85;color:var(--muted);margin:0 0 18px;}
.faq-list{border-top:1px solid var(--border);}
.faq-item{border-bottom:1px solid var(--border);transition:background .2s ease;}
.faq-item.is-open{background:var(--primary-mist);}
.faq-question{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:62px;padding:14px 18px;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:16.5px;font-weight:600;color:var(--ink);
}
.faq-question:hover{color:var(--primary);}
.faq-question:focus-visible{outline:2px solid var(--primary-light);outline-offset:-2px;}
.faq-icon{
  flex-shrink:0;width:28px;height:28px;border-radius:50%;border:1px solid var(--border);
  background:var(--surface);display:flex;align-items:center;justify-content:center;
  font-size:17px;line-height:1;color:var(--primary);font-weight:600;
}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .32s ease;}
.faq-item.is-open .faq-answer{max-height:420px;}
.faq-answer .inner{padding:0 18px 22px;max-width:760px;font-size:16px;line-height:1.85;color:var(--muted);}

/* ---------- notice ---------- */
.notice-band{
  background:var(--success-soft);border:1px solid #C9E6D9;border-radius:var(--radius-card);
  padding:26px 28px;display:flex;gap:18px;align-items:flex-start;
}
.notice-band .n-icon{
  width:44px;height:44px;border-radius:12px;background:#fff;border:1px solid #C9E6D9;
  display:flex;align-items:center;justify-content:center;color:var(--success);flex-shrink:0;
}
.notice-band h3{font-size:19px;font-weight:700;margin:0 0 8px;color:var(--ink);}
.notice-band p{font-size:15.5px;line-height:1.8;color:#2C4A3E;margin:0;}

/* ---------- cta ---------- */
.cta-band{background:var(--primary-mist);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:76px 0;}
.cta-inner{max-width:760px;margin:0 auto;text-align:center;}
.cta-inner h2{font-size:34px;line-height:1.3;font-weight:700;margin:0 0 16px;color:var(--ink);}
.cta-inner p{font-size:16.5px;line-height:1.85;color:var(--muted);margin:0 0 30px;}
.cta-inner .btn-row{justify-content:center;margin-top:0;}

/* ---------- footer ---------- */
.site-footer{
  background:#0E2A42;color:rgba(255,255,255,.78);padding:64px 0 28px;position:relative;overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:34px 34px;opacity:.05;
}
.site-footer .container{position:relative;z-index:1;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;}
.footer-title{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;letter-spacing:.02em;}
.footer-link{display:block;font-size:14.5px;color:rgba(255,255,255,.78);line-height:1.6;margin-bottom:11px;}
.footer-link:hover{color:#fff;text-decoration:underline;}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(255,255,255,.6);
}

/* ---------- to top ---------- */
.to-top{
  position:fixed;right:24px;bottom:28px;width:46px;height:46px;border-radius:50%;
  background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow-card);
  display:flex;align-items:center;justify-content:center;color:var(--primary);
  cursor:pointer;opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .25s ease,transform .25s ease,background .2s ease,color .2s ease,visibility .25s;
  z-index:70;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--primary);color:#fff;border-color:var(--primary);}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .nav-chips .chip{padding:0 12px;font-size:14px;}
  .page-title{font-size:44px;}
}
@media (max-width:1024px){
  .container{padding:0 24px;}
  .nav-chips,.header-cta{display:none;}
  .nav-toggle{display:flex;}
  .page-hero{padding:44px 0 52px;}
  .page-hero-grid{grid-template-columns:1fr;gap:34px;}
  .hero-visual{max-width:560px;}
  .page-title{font-size:40px;}
  .security-layout{grid-template-columns:1fr;gap:28px;}
  .security-aside{position:static;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .faq-grid{grid-template-columns:1fr;gap:28px;}
  .section{padding:64px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:768px){
  body.site-body{font-size:16px;}
  .page-title{font-size:34px;}
  .section-title,.cta-inner h2{font-size:26px;}
  .security-list{grid-template-columns:1fr;}
  .sec-card h3{font-size:20px;}
  .section{padding:52px 0;}
  .cta-band{padding:56px 0;}
  .notice-band{flex-direction:column;gap:14px;padding:22px;}
  .mobile-panel .inner{padding:14px 0 20px;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .page-title{font-size:30px;}
  .section-title,.cta-inner h2{font-size:23px;}
  .steps{grid-template-columns:1fr;}
  .btn-row{flex-direction:column;}
  .btn-row .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .to-top{right:16px;bottom:18px;}
  .hero-facts{gap:8px;}
}

/* roulang page: category3 */
:root{
  --primary:#1F5E8C;
  --primary-dark:#16456A;
  --primary-light:#D9EAF7;
  --primary-mist:#EEF5FB;
  --accent:#E0A84B;
  --accent-soft:#F7E8C8;
  --success:#2F8F6B;
  --danger:#C24C4C;
  --bg:#F6F9FC;
  --surface:#FFFFFF;
  --ink:#111827;
  --muted:#5D6B7A;
  --border:#DCE5EE;
  --radius-card:18px;
  --radius-btn:12px;
  --shadow-card:0 12px 30px rgba(22,69,106,.08);
  --shadow-hover:0 16px 40px rgba(22,69,106,.14);
}
*,*::before,*::after{box-sizing:border-box}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
  font-size:16.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;border:0;background:none;cursor:pointer;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}
.tnum{font-variant-numeric:tabular-nums}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(135deg,#2A6E9E,#16456A);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 18px rgba(22,69,106,.22);
}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text b{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:.2px}
.logo-text span{font-size:12.5px;color:var(--muted);letter-spacing:.8px}
.nav-chips{display:flex;align-items:center;gap:4px;flex-wrap:nowrap}
.chip{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  padding:8px 16px;border-radius:999px;font-size:14.5px;color:var(--muted);
  white-space:nowrap;transition:background .2s ease,color .2s ease;
}
.chip:hover{background:var(--primary-mist);color:var(--primary)}
.chip.is-active{background:var(--primary-light);color:var(--primary);font-weight:600}
.chip.is-active::after{
  content:"";position:absolute;left:50%;bottom:-6px;transform:translateX(-50%);
  width:22px;height:2px;border-radius:2px;background:var(--primary);
}
.nav-right{display:flex;align-items:center;gap:12px;flex-shrink:0}
.menu-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:10px;border:1px solid var(--border);color:var(--primary);
}
.menu-toggle:hover{background:var(--primary-mist)}
.mobile-panel{display:none;border-top:1px solid var(--border);background:#fff;padding:16px 0 20px}
.mobile-panel.is-open{display:block}
.mobile-panel .chip{display:block;padding:12px 16px;border-radius:12px;font-size:15.5px}
.mobile-panel .chip.is-active::after{display:none}
.mobile-cta{margin-top:14px;width:100%}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15.5px;font-weight:600;border:1px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .15s ease,box-shadow .2s ease;
}
.btn:focus-visible{outline:2px solid var(--primary-light);outline-offset:2px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 22px rgba(31,94,140,.22)}
.btn-primary:hover{background:var(--primary-dark)}
.btn-primary:active{transform:translateY(1px)}
.btn-accent{background:var(--accent);color:#22313F;box-shadow:0 10px 22px rgba(224,168,75,.26)}
.btn-accent:hover{background:#D19A3C}
.btn-ghost{background:#fff;border-color:var(--border);color:var(--primary)}
.btn-ghost:hover{background:var(--primary-mist);border-color:var(--primary-light)}
.btn-sm{height:40px;padding:0 18px;font-size:14.5px;border-radius:10px}
.btn-block{width:100%}

/* ---------- 通用区块 ---------- */
.section{padding:84px 0}
.section-tight{padding:60px 0}
.section-mist{background:var(--primary-mist)}
.section-white{background:var(--surface)}
.section-head{max-width:760px;margin-bottom:40px}
.section-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:1.4px;color:var(--primary);
  background:var(--primary-mist);border:1px solid var(--primary-light);
  padding:6px 14px;border-radius:999px;margin-bottom:16px;
}
.section-title{font-size:clamp(24px,2.9vw,34px);line-height:1.28;font-weight:700;color:var(--ink)}
.section-sub{margin-top:14px;font-size:16.5px;color:var(--muted);line-height:1.8}
.eyebrow-line{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:14px}

/* ---------- 面包屑 ---------- */
.breadcrumb-wrap{padding-top:24px}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13.5px;color:var(--muted)}
.breadcrumb a:hover{color:var(--primary);text-decoration:underline}
.breadcrumb .sep{color:#B7C4D1}
.breadcrumb .current{color:var(--ink);font-weight:600}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:44px 0 78px;background:var(--bg)}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(31,94,140,.16) 1px,transparent 1px);
  background-size:28px 28px;opacity:.35;
  -webkit-mask-image:radial-gradient(circle at 15% 20%,#000,transparent 62%);
  mask-image:radial-gradient(circle at 15% 20%,#000,transparent 62%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero-title{font-size:clamp(30px,4.3vw,50px);line-height:1.16;font-weight:700;letter-spacing:-.4px}
.hero-title .hl{color:var(--primary)}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.85;color:var(--muted);max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;border-radius:999px;background:#fff;
  border:1px solid var(--border);font-size:13.5px;color:var(--muted);
}
.badge svg{color:var(--success)}
.badge .dot-gold{width:7px;height:7px;border-radius:50%;background:var(--accent);display:inline-block}
.hero-visual{position:relative;border-radius:24px;overflow:hidden;background:var(--primary-mist);box-shadow:var(--shadow-card);aspect-ratio:4/3}
.hero-visual img{width:100%;height:100%;object-fit:cover}
.hero-visual::after{content:"";position:absolute;inset:0;background:rgba(246,249,252,.18);pointer-events:none}
.entry-card{
  position:absolute;left:16px;right:16px;bottom:16px;z-index:2;
  background:rgba(255,255,255,.96);border:1px solid var(--border);border-radius:16px;
  padding:14px 16px;box-shadow:0 12px 30px rgba(22,69,106,.14);
}
.entry-card-title{font-size:13px;letter-spacing:1px;color:var(--muted);margin-bottom:8px}
.entry-link{
  display:flex;align-items:center;justify-content:space-between;
  font-size:14.5px;color:var(--primary);padding:7px 0;
  border-bottom:1px dashed var(--border);
}
.entry-link:last-child{border-bottom:0}
.entry-link:hover{color:var(--primary-dark);text-decoration:underline}

/* ---------- 主题锚点 chips ---------- */
.topic-bar{display:flex;gap:10px;overflow-x:auto;padding:18px 0 4px;scrollbar-width:none}
.topic-bar::-webkit-scrollbar{display:none}
.topic-chip{
  display:inline-flex;align-items:center;gap:8px;flex:0 0 auto;
  padding:10px 18px;border-radius:999px;background:#fff;border:1px solid var(--border);
  font-size:14.5px;color:var(--muted);transition:all .2s ease;
}
.topic-chip:hover{border-color:var(--primary-light);color:var(--primary);background:var(--primary-mist)}
.topic-chip .ico{color:var(--primary)}

/* ---------- 卡片 ---------- */
.card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  display:flex;flex-direction:column;overflow:hidden;
}
.card:hover{transform:translateY(-2px);border-color:var(--primary-light);box-shadow:var(--shadow-hover)}
.card-body{padding:24px}
.card-cover{aspect-ratio:16/10;background:var(--primary-mist);overflow:hidden}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.card:hover .card-cover img{transform:scale(1.03)}
.tag{
  display:inline-flex;align-items:center;padding:5px 12px;border-radius:999px;
  background:var(--primary-mist);color:var(--primary);font-size:12.5px;letter-spacing:.4px;
}
.tag-gold{background:var(--accent-soft);color:#8A6116}
.card-title{font-size:21px;line-height:1.4;font-weight:600;margin-top:14px}
.card-text{margin-top:10px;font-size:15.5px;color:var(--muted);line-height:1.75}
.card-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:18px;
  font-size:14.5px;font-weight:600;color:var(--primary);
}
.card-link:hover{text-decoration:underline}
.card-link svg{transition:transform .2s ease}
.card:hover .card-link svg{transform:translateX(3px)}

.tutorial-grid-large{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.tutorial-grid-small{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:24px}
.mini-card{padding:22px}
.icon-box{
  width:44px;height:44px;border-radius:12px;background:var(--primary-mist);
  display:flex;align-items:center;justify-content:center;color:var(--primary);
}
.mini-title{font-size:17px;font-weight:600;line-height:1.45;margin-top:16px}
.mini-text{margin-top:8px;font-size:14.5px;color:var(--muted);line-height:1.7}

/* ---------- 三步走 + 设备对照 ---------- */
.split-grid{display:grid;grid-template-columns:5fr 7fr;gap:24px;align-items:start}
.panel{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:30px;
}
.panel-title{font-size:22px;font-weight:700;line-height:1.35}
.panel-sub{margin-top:10px;font-size:15px;color:var(--muted);line-height:1.75}
.step-list{margin-top:24px;position:relative}
.step-item{position:relative;padding-left:52px;padding-bottom:26px}
.step-item:last-child{padding-bottom:0}
.step-item::before{
  content:"";position:absolute;left:17px;top:38px;bottom:-4px;width:1px;background:var(--border);
}
.step-item:last-child::before{display:none}
.step-num{
  position:absolute;left:0;top:0;width:35px;height:35px;border-radius:50%;
  background:var(--primary-mist);border:1px solid var(--primary-light);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;
}
.step-title{font-size:17px;font-weight:600}
.step-text{margin-top:6px;font-size:15px;color:var(--muted);line-height:1.75}
.device-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:22px}
.device-card{
  border:1px solid var(--border);border-radius:16px;padding:22px;background:var(--surface);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.device-card:hover{border-color:var(--primary-light);box-shadow:var(--shadow-card)}
.device-head{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:600}
.device-head .icon-box{width:38px;height:38px;border-radius:11px}
.tick-list{margin-top:16px}
.tick-list li{position:relative;padding-left:22px;font-size:14.8px;color:var(--muted);line-height:1.8;margin-bottom:8px}
.tick-list li::before{
  content:"";position:absolute;left:2px;top:11px;width:6px;height:6px;border-radius:50%;
  background:var(--primary);opacity:.55;
}
.note-strip{
  margin-top:22px;display:flex;gap:12px;align-items:flex-start;
  background:var(--primary-mist);border:1px solid var(--primary-light);
  border-radius:14px;padding:16px 18px;font-size:14.8px;color:var(--ink);line-height:1.75;
}
.note-strip svg{flex-shrink:0;color:var(--primary);margin-top:3px}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.faq-side{position:sticky;top:96px}
.faq-list{border-top:1px solid var(--border)}
.faq-item{border-bottom:1px solid var(--border)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:60px;padding:16px 18px;text-align:left;font-size:16.5px;font-weight:600;
  color:var(--ink);transition:background .2s ease,color .2s ease;border-radius:12px 12px 0 0;
}
.faq-q:hover{background:var(--primary-mist)}
.faq-item.is-open .faq-q{background:var(--primary-mist);color:var(--primary)}
.faq-sign{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;border:1px solid var(--border);
  background:#fff;display:flex;align-items:center;justify-content:center;
  font-size:16px;line-height:1;color:var(--primary);transition:background .2s ease,color .2s ease;
}
.faq-item.is-open .faq-sign{background:var(--primary);color:#fff;border-color:var(--primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease}
.faq-item.is-open .faq-a{max-height:460px}
.faq-a-inner{padding:6px 18px 22px;font-size:16px;line-height:1.85;color:var(--muted);max-width:760px}

/* ---------- CTA ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--primary-mist);border-radius:24px;padding:56px 40px;text-align:center}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(31,94,140,.18) 1px,transparent 1px);
  background-size:24px 24px;opacity:.3;
  -webkit-mask-image:radial-gradient(circle at 80% 30%,#000,transparent 65%);
  mask-image:radial-gradient(circle at 80% 30%,#000,transparent 65%);
}
.cta-band > *{position:relative}
.cta-title{font-size:clamp(24px,3vw,34px);line-height:1.3;font-weight:700}
.cta-text{margin-top:14px;font-size:16.5px;color:var(--muted);line-height:1.8;max-width:680px;margin-left:auto;margin-right:auto}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:30px}
.cta-hint{margin-top:18px;font-size:13.5px;color:var(--muted)}

/* ---------- 页脚 ---------- */
.site-footer{position:relative;overflow:hidden;background:#0E2A42;color:#fff;padding:64px 0 28px}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:34px 34px;opacity:.05;
}
.site-footer .container{position:relative}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1.1fr 1.3fr;gap:40px}
.footer-title{font-size:14px;font-weight:700;letter-spacing:.8px;color:#fff;margin-bottom:14px}
.footer-link{display:block;font-size:14.5px;color:rgba(255,255,255,.78);padding:6px 0;transition:color .2s ease}
.footer-link:hover{color:#fff;text-decoration:underline}
.footer-bottom{
  margin-top:46px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13.5px;color:rgba(255,255,255,.6);
}

/* ---------- 返回顶部 ---------- */
#toTop{
  position:fixed;right:24px;bottom:24px;z-index:50;
  width:46px;height:46px;border-radius:50%;background:#fff;border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;color:var(--primary);
  box-shadow:var(--shadow-card);opacity:0;visibility:hidden;transition:all .25s ease;
}
#toTop.show{opacity:1;visibility:visible}
#toTop:hover{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .nav-chips{gap:0}
  .chip{padding:8px 12px;font-size:14px}
}
@media (max-width:1080px){
  .nav-chips{display:none}
  .menu-toggle{display:flex}
  .nav-right .btn{display:none}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual{order:-1;aspect-ratio:16/10}
  .split-grid{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr;gap:28px}
  .faq-side{position:static}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .tutorial-grid-large{grid-template-columns:1fr}
  .tutorial-grid-small{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .container{padding:0 24px}
  .section{padding:62px 0}
  .section-tight{padding:48px 0}
  .hero{padding:34px 0 60px}
  .hero-sub{font-size:16px}
  .btn{height:46px;padding:0 20px;font-size:15px}
  .device-grid{grid-template-columns:1fr}
  .cta-band{padding:42px 24px;border-radius:20px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .section{padding:52px 0}
  .tutorial-grid-small{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .logo-text b{font-size:15px}
  .logo-text span{font-size:11.5px}
  .hero-actions .btn{width:100%}
  .cta-actions .btn{width:100%}
  .panel{padding:22px}
  #toTop{right:16px;bottom:16px}
}