/* roulang page: index */
:root{
  --primary:#2A6F97;
  --primary-dark:#215A7C;
  --primary-deep:#16405A;
  --light:#E7F0F6;
  --bg:#F7FAFC;
  --card:#FFFFFF;
  --ink:#10242F;
  --text-2:#47606E;
  --line:#E2E9EF;
  --accent:#D2803F;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(16,36,47,.04);
  --sh-2:0 12px 28px rgba(16,36,47,.09);
  --sec:96px;
}
*,*::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 SC",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;line-height:1.875;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--primary-deep);line-height:1.35;letter-spacing:-0.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
h1{font-size:40px;line-height:48px;font-weight:800;letter-spacing:-0.02em;}
h2{font-size:30px;line-height:40px;font-weight:700;}
h3{font-size:20px;line-height:28px;font-weight:600;}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(42,111,151,.25);border-radius:8px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section-tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--primary);}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--accent);display:inline-block;}
.lead{color:var(--text-2);font-size:16px;line-height:1.9;margin-top:12px;}
.text-muted{color:var(--text-2);}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;padding:13px 26px;border:1px solid transparent;cursor:pointer;
  transition:background-color .2s ease-out,color .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);}
.btn-primary:active{transform:none;}
.btn-outline{background:#fff;color:var(--primary);border-color:var(--primary);}
.btn-outline:hover{background:rgba(42,111,151,.08);transform:translateY(-1px);}
.btn-outline:active{transform:none;}
.btn-accent{background:var(--accent);color:#fff;}
.btn-accent:hover{background:#B96D2F;transform:translateY(-1px);}
.btn-accent:active{transform:none;}
.btn-sm{padding:9px 18px;font-size:14px;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-weight:600;font-size:15px;transition:color .2s ease-out;}
.link-arrow span{transition:transform .2s ease-out;}
.link-arrow:hover{color:var(--primary-dark);}
.link-arrow:hover span{transform:translateX(4px);}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid transparent;transition:border-color .2s ease-out,box-shadow .2s ease-out;}
.site-header.scrolled{border-bottom-color:var(--line);box-shadow:0 1px 2px rgba(16,36,47,.06);}
.nav-wrap{position:relative;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;height:72px;}
.nav-side{display:flex;align-items:center;gap:22px;}
.nav-side.right{justify-content:flex-end;}
.nav-link{position:relative;font-size:15px;color:var(--text-2);padding:6px 2px;transition:color .2s ease-out;white-space:nowrap;}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--primary);transition:width .2s ease-out;}
.nav-link:hover{color:var(--primary-deep);}
.nav-link:hover::after{width:100%;}
.nav-link.active{color:var(--primary);font-weight:600;background:rgba(42,111,151,.09);border-radius:8px;padding:6px 12px;}
.nav-link.active::after{display:none;}
.brand{display:inline-flex;align-items:center;gap:10px;justify-self:center;}
.brand-icon{color:var(--primary);flex:0 0 auto;}
.brand-text{font-size:17px;font-weight:700;color:var(--primary-deep);letter-spacing:.01em;white-space:nowrap;}
.nav-toggle{display:none;align-items:center;justify-content:center;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);background:#fff;cursor:pointer;position:absolute;left:0;top:50%;transform:translateY(-50%);}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--primary-deep);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--primary-deep);}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.mobile-panel{display:none;background:#fff;border-top:1px solid var(--line);box-shadow:var(--sh-2);}
.mobile-panel.open{display:block;}
.mobile-panel a{display:flex;align-items:center;height:48px;padding:0 24px;font-size:15px;color:var(--ink);border-bottom:1px solid var(--line);}
.mobile-panel a.active{color:var(--primary);font-weight:600;}
.mobile-panel .m-cta{margin:16px 24px 24px;height:48px;justify-content:center;border-radius:10px;background:var(--primary);color:#fff;font-weight:600;border-bottom:none;}
.mobile-panel .m-cta:hover{background:var(--primary-dark);}

/* hero */
.hero{position:relative;background:#fff;padding:56px 0 72px;overflow:hidden;}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;min-height:560px;}
.hero-sub{font-size:19px;line-height:1.65;color:var(--primary);font-weight:600;margin-top:18px;}
.hero-note{color:var(--text-2);font-size:15px;line-height:1.9;margin-top:16px;max-width:600px;}
.hero-actions{display:flex;align-items:center;gap:24px;flex-wrap:wrap;margin-top:32px;}
.hero-metrics{display:flex;flex-wrap:wrap;margin-top:44px;border-top:1px solid var(--line);padding-top:24px;}
.metric{padding:0 30px;border-left:1px solid var(--line);}
.metric:first-child{padding-left:0;border-left:none;}
.metric-num{display:block;font-size:23px;font-weight:700;color:var(--primary-deep);letter-spacing:-0.01em;}
.metric-label{font-size:14px;color:var(--text-2);}
.hero-media{position:relative;}
.hero-media .frame{position:absolute;inset:18px -18px -18px 18px;border:1px solid rgba(42,111,151,.45);border-radius:14px;}
.hero-media img{position:relative;z-index:1;width:100%;border-radius:var(--r-img);object-fit:cover;}

/* pain */
.pain-grid{display:grid;grid-template-columns:4fr 8fr;gap:48px;}
.pain-aside{position:sticky;top:104px;align-self:start;}
.pain-item{display:grid;grid-template-columns:52px 1fr;gap:20px;padding:26px 0;border-top:1px solid var(--line);}
.pain-item:last-child{border-bottom:1px solid var(--line);}
.pain-num{width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;display:flex;align-items:center;justify-content:center;color:var(--accent);font-weight:700;font-size:15px;}
.pain-item h3{margin-bottom:8px;}
.pain-item p{color:var(--text-2);font-size:15px;line-height:1.9;}

/* zigzag */
.zigzag{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:40px 0;border-bottom:1px solid var(--line);}
.zigzag:last-child{border-bottom:none;}
.zigzag.reverse .zz-media{order:2;}
.zz-media{position:relative;}
.zz-media .frame{position:absolute;inset:14px -14px -14px 14px;border:1px solid rgba(42,111,151,.4);border-radius:14px;}
.zz-media img{position:relative;z-index:1;width:100%;border-radius:var(--r-img);object-fit:cover;}
.zz-body h3{margin-bottom:12px;}
.zz-body p{color:var(--text-2);font-size:15px;line-height:1.9;margin-bottom:12px;}
.bullet-list li{position:relative;padding-left:18px;color:var(--text-2);font-size:15px;line-height:2;}
.bullet-list li::before{content:"";position:absolute;left:0;top:14px;width:7px;height:7px;background:var(--primary);border-radius:2px;}
.zz-body .link-arrow{margin-top:18px;}

/* band + stats */
.band{background:var(--light);}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);margin-top:44px;}
.stat{padding:8px 28px;border-left:1px solid rgba(22,64,90,.14);}
.stat:first-child{border-left:none;padding-left:0;}
.stat-num{font-size:40px;font-weight:800;color:var(--accent);letter-spacing:-0.02em;line-height:1.2;}
.stat-name{font-size:16px;font-weight:600;color:var(--primary-deep);margin-top:6px;}
.stat-desc{font-size:14px;color:var(--text-2);line-height:1.8;margin-top:6px;}

/* voices */
.voice-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:start;}
.voice-side{display:grid;gap:24px;}
.voice-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:28px;transition:border-color .3s ease-out,box-shadow .3s ease-out,transform .3s ease-out;}
.voice-card:hover{border-color:#BBD5E4;box-shadow:var(--sh-2);transform:translateY(-2px);}
.voice-main{padding:40px;}
.voice-mark{font-size:44px;line-height:1;color:rgba(42,111,151,.25);font-family:Georgia,"Songti SC",serif;}
.voice-text{font-size:16px;line-height:1.95;color:var(--ink);margin-top:12px;}
.voice-main .voice-text{font-size:17px;}
.voice-person{display:flex;align-items:center;gap:12px;margin-top:24px;padding-top:18px;border-top:1px solid var(--line);}
.avatar{width:44px;height:44px;border-radius:999px;background:var(--light);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--primary);font-weight:700;font-size:15px;}
.person-name{font-size:15px;font-weight:600;color:var(--primary-deep);}
.person-role{font-size:13px;color:var(--text-2);}

/* cards / news */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);transition:border-color .3s ease-out,box-shadow .3s ease-out,transform .3s ease-out;overflow:hidden;}
.card:hover{border-color:#BBD5E4;box-shadow:var(--sh-2);transform:translateY(-2px);}
.card:hover .card-img img{transform:scale(1.03);}
.card-img{position:relative;aspect-ratio:16/9;background:var(--light);overflow:hidden;}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out;}
.news-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.news-card{display:flex;flex-direction:column;height:100%;}
.news-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-title{font-size:17px;line-height:26px;font-weight:600;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-sum{font-size:14px;line-height:24px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{margin-top:auto;display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-2);border-top:1px solid var(--line);padding-top:12px;}
.badge{display:inline-block;align-self:flex-start;font-size:12px;letter-spacing:.06em;padding:4px 10px;border-radius:999px;background:rgba(210,128,63,.13);color:#A55F26;}
.empty-state{grid-column:1/-1;background:#fff;border:1px dashed var(--line);border-radius:var(--r-card);padding:56px 24px;text-align:center;}
.empty-icon{width:52px;height:52px;margin:0 auto 16px;border:2px solid var(--line);border-radius:14px;position:relative;}
.empty-icon::after{content:"";position:absolute;left:14px;right:14px;top:24px;height:2px;background:var(--line);box-shadow:0 8px 0 var(--line);}

/* faq */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:48px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden;transition:border-color .2s ease-out,box-shadow .2s ease-out;}
.faq-item[open]{border-color:#BBD5E4;box-shadow:var(--sh-1);}
.faq-item summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:56px;padding:8px 20px;font-size:16px;font-weight:600;color:var(--primary-deep);cursor:pointer;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-icon{color:var(--primary);font-size:20px;line-height:1;transition:transform .2s ease-out;flex:0 0 auto;}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-body{padding:14px 20px 18px;background:var(--bg);border-top:1px solid var(--line);color:var(--text-2);font-size:15px;line-height:1.95;}

/* cta */
.cta-panel{background:var(--primary-deep);border-radius:20px;padding:56px;color:#fff;display:grid;grid-template-columns:1fr 1fr;gap:48px;}
.cta-panel h2{color:#fff;}
.cta-panel .lead{color:rgba(255,255,255,.78);}
.cta-actions{display:flex;gap:16px;flex-wrap:wrap;margin-top:28px;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field label{font-size:14px;color:rgba(255,255,255,.86);}
.field input,.field textarea{width:100%;height:48px;border-radius:10px;border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.08);color:#fff;padding:0 14px;transition:border-color .2s ease-out,box-shadow .2s ease-out;}
.field textarea{height:112px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.5);}
.field input:focus,.field textarea:focus{outline:none;border-color:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.22);}
.form-tip{display:none;margin-top:14px;padding:12px 16px;border-radius:10px;background:rgba(255,255,255,.15);color:#fff;font-size:14px;}
.form-tip.show{display:block;}

/* footer */
.footer{background:var(--primary-deep);color:rgba(255,255,255,.78);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;}
.footer h3{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer p{font-size:14px;line-height:1.95;}
.footer a{display:block;font-size:14px;line-height:2.1;color:rgba(255,255,255,.78);transition:color .2s ease-out;}
.footer a:hover{color:#fff;text-decoration:underline;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16px;}
.footer-bottom{margin-top:48px;border-top:1px solid rgba(255,255,255,.16);padding:20px 0 24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.6);}
.footer-bottom a{display:inline;font-size:13px;color:rgba(255,255,255,.6);}

section[id]{scroll-margin-top:88px;}

@media (max-width:1023px){
  .nav-side{display:none;}
  .nav-toggle{display:inline-flex;}
  .hero-grid{grid-template-columns:1fr;min-height:520px;gap:32px;}
  .hero-media .frame{inset:12px -12px -12px 12px;}
  .pain-grid,.faq-grid{grid-template-columns:1fr;gap:24px;}
  .pain-aside{position:static;}
  .zigzag{grid-template-columns:1fr;gap:28px;}
  .zigzag.reverse .zz-media{order:0;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .stat{padding:8px 20px;}
  .stat:nth-child(odd){border-left:none;padding-left:0;}
  .stat:nth-child(n+3){margin-top:32px;}
  .voice-grid{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .cta-panel{grid-template-columns:1fr;padding:40px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  h1{font-size:30px;line-height:38px;}
  h2{font-size:24px;line-height:34px;}
  .section{padding:56px 0;}
  .section-tight{padding:44px 0;}
  .hero{padding:40px 0 56px;}
  .hero-sub{font-size:17px;}
  .brand-text{font-size:15px;}
  .brand-icon{width:26px;height:26px;}
  .voice-main{padding:28px;}
}
@media (max-width:640px){
  .container{padding:0 20px;}
  .news-grid{grid-template-columns:1fr;}
  .stat-grid{grid-template-columns:1fr;}
  .stat{border-left:none;padding:0;}
  .stat + .stat{margin-top:28px;border-top:1px solid rgba(22,64,90,.14);padding-top:24px;}
  .form-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .metric{padding:0 18px;}
  .voice-grid{gap:16px;}
  .news-body{padding:18px;}
}

/* roulang page: category1 */
:root{
  --primary:#2A6F97;
  --primary-dark:#1F5878;
  --primary-deep:#16405A;
  --primary-light:#E7F0F6;
  --bg:#F7FAFC;
  --card:#FFFFFF;
  --ink:#10242F;
  --muted:#47606E;
  --line:#E2E9EF;
  --accent:#D2803F;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 1px 2px rgba(16,36,47,.04);
  --shadow-2:0 12px 28px rgba(16,36,47,.09);
  --section-gap:96px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.875;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid rgba(42,111,151,.35);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:var(--section-gap) 0;}
.section-tight{padding:56px 0;}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid transparent;
  transition:border-color .2s ease-out, box-shadow .2s ease-out;
}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 1px 2px rgba(16,36,47,.05);}
.nav-wrap{
  position:relative;
  height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.nav-side{display:flex;align-items:center;gap:8px;}
.nav-side.left{justify-content:flex-start;flex:1;}
.nav-side.right{justify-content:flex-end;flex:1;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 14px;
  font-size:15px;
  color:var(--muted);
  border-radius:8px;
  transition:color .2s ease-out, background-color .2s ease-out;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:2px;background:var(--primary);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s ease-out;
}
.nav-link:hover{color:var(--primary-dark);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{
  color:var(--primary-dark);
  font-weight:600;
  background:var(--primary-light);
}
.nav-link.active::after{transform:scaleX(0);}
.brand{
  position:absolute;
  left:50%;
  top:50%;
  transform:translate(-50%,-50%);
  display:flex;
  align-items:center;
  gap:10px;
  font-size:18px;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--primary-deep);
  white-space:nowrap;
}
.brand svg{color:var(--primary);flex:none;}
.nav-cta{
  display:inline-flex;align-items:center;gap:6px;
  margin-left:10px;
  padding:10px 20px;
  background:var(--primary);
  color:#fff;
  font-size:15px;
  border-radius:var(--radius-btn);
  transition:background-color .2s ease-out, transform .2s ease-out;
}
.nav-cta:hover{background:var(--primary-dark);transform:translateY(-1px);}
.nav-cta:active{transform:none;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);border-radius:10px;
  cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--primary-deep);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--primary-deep);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.mobile-panel{display:none;background:#fff;border-top:1px solid var(--line);}
.mobile-panel.open{display:block;}
.mobile-panel a{
  display:flex;align-items:center;
  height:48px;padding:0 24px;
  font-size:16px;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.mobile-panel a.active{color:var(--primary-dark);font-weight:600;background:var(--primary-light);}
.mobile-panel .mobile-cta{
  margin:16px 24px 20px;
  height:48px;
  justify-content:center;
  background:var(--primary);color:#fff;
  border-radius:var(--radius-btn);
  border-bottom:none;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;
  border-radius:var(--radius-btn);
  font-size:15px;font-weight:500;
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color .2s ease-out, color .2s ease-out, border-color .2s ease-out, transform .2s ease-out, box-shadow .2s ease-out;
}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn-primary:active{transform:none;}
.btn-ghost{background:#fff;color:var(--primary);border-color:var(--primary);}
.btn-ghost:hover{background:rgba(42,111,151,.08);}
.btn-ghost:active{transform:none;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--primary);font-size:15px;font-weight:500;
  transition:color .2s ease-out;
}
.link-arrow svg{transition:transform .2s ease-out;}
.link-arrow:hover{color:var(--primary-dark);}
.link-arrow:hover svg{transform:translateX(4px);}

/* ---------- hero ---------- */
.cat-hero{
  padding:72px 0 64px;
  background:#fff;
  border-bottom:1px solid var(--line);
}
.hero-narrow{max-width:760px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:4px 12px;
  border-radius:999px;
  background:var(--primary-light);
  color:var(--primary-dark);
  font-size:12px;letter-spacing:.06em;
  margin-bottom:20px;
}
.eyebrow i{display:block;width:6px;height:6px;border-radius:50%;background:var(--accent);}
.cat-hero h1{
  font-size:40px;line-height:1.2;font-weight:700;letter-spacing:-.02em;
  color:var(--primary-deep);
  margin-bottom:18px;
}
.hero-lead{font-size:17px;line-height:1.9;color:var(--muted);}
.hero-lead p + p{margin-top:8px;}
.hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px;}
.crumb{
  font-size:13px;color:var(--muted);
  display:flex;align-items:center;gap:8px;
  margin-bottom:22px;
}
.crumb a:hover{color:var(--primary);}
.crumb span.sep{color:#B9C6CF;}

/* ---------- section head ---------- */
.sec-head{max-width:760px;margin-bottom:48px;}
.sec-head h2{
  font-size:30px;line-height:1.33;font-weight:700;
  color:var(--primary-deep);
  letter-spacing:-.01em;
  margin-bottom:14px;
}
.sec-head p{color:var(--muted);font-size:16px;}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}

/* ---------- explain rows ---------- */
.explain-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
  padding:40px 0;
  border-top:1px solid var(--line);
}
.explain-row:first-of-type{border-top:none;padding-top:0;}
.explain-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;
  background:var(--primary-light);
  color:var(--primary-dark);
  font-size:14px;font-weight:700;
  border-radius:8px;
  margin-bottom:16px;
}
.explain-row h3{
  font-size:20px;line-height:1.4;font-weight:600;
  color:var(--primary-deep);
  margin-bottom:12px;
}
.explain-row p{color:var(--muted);}
.explain-list{margin-top:18px;}
.explain-list li{
  position:relative;
  padding-left:20px;
  line-height:1.9;
  color:var(--ink);
}
.explain-list li::before{
  content:"";
  position:absolute;left:0;top:.85em;
  width:6px;height:6px;
  background:var(--primary);
  border-radius:1px;
}
.wireframe{
  position:relative;
  padding:18px;
  background:var(--primary-light);
  border-radius:var(--radius-card);
}
.wireframe::before{
  content:"";
  position:absolute;
  inset:8px 8px -8px -8px;
  border:1px solid var(--primary);
  border-radius:var(--radius-card);
  opacity:.35;
  pointer-events:none;
}
.wireframe-inner{
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-img);
  overflow:hidden;
}
.wireframe-inner img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;}
.wireframe-bar{
  display:flex;gap:6px;padding:10px 14px;border-bottom:1px solid var(--line);
}
.wireframe-bar i{display:block;width:8px;height:8px;border-radius:50%;background:var(--line);}
.wireframe-lines{padding:16px 18px 20px;}
.wireframe-lines i{
  display:block;height:10px;border-radius:4px;background:var(--primary-light);margin-bottom:10px;
}
.wireframe-lines i:nth-child(1){width:70%;}
.wireframe-lines i:nth-child(2){width:92%;}
.wireframe-lines i:nth-child(3){width:56%;}
.wireframe-note{
  display:inline-block;margin-top:10px;
  padding:2px 10px;border-radius:999px;
  background:rgba(210,128,63,.12);
  color:var(--accent);
  font-size:12px;letter-spacing:.06em;
}

/* ---------- big cards ---------- */
.big-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.big-card{
  display:flex;flex-direction:column;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  overflow:hidden;
  transition:border-color .25s ease-out, box-shadow .25s ease-out, transform .25s ease-out;
}
.big-card:hover{
  border-color:#BFD8E5;
  box-shadow:var(--shadow-2);
  transform:translateY(-2px);
}
.big-card .thumb{overflow:hidden;background:var(--primary-light);}
.big-card .thumb img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  transition:transform .3s ease-out;
}
.big-card:hover .thumb img{transform:scale(1.03);}
.big-card .body{padding:24px;display:flex;flex-direction:column;flex:1;gap:12px;}
.badge{
  display:inline-flex;align-items:center;
  padding:2px 10px;
  border-radius:999px;
  background:rgba(210,128,63,.12);
  color:var(--accent);
  font-size:12px;letter-spacing:.06em;
  width:fit-content;
}
.big-card h3{
  font-size:17px;line-height:1.5;font-weight:600;color:var(--primary-deep);
}
.big-card p{color:var(--muted);font-size:15px;}
.big-card .card-foot{
  margin-top:auto;padding-top:16px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:14px;color:var(--muted);
}

/* ---------- tail area ---------- */
.tail-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr;
  gap:24px;
  align-items:start;
}
.panel{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:28px;
}
.panel h3{
  font-size:18px;font-weight:600;color:var(--primary-deep);margin-bottom:16px;
}
.rec-item{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 0;
  border-top:1px solid var(--line);
  transition:background-color .2s ease-out;
}
.rec-item:first-of-type{border-top:none;padding-top:0;}
.rec-item + .rec-item{margin-top:0;}
.rec-item:hover{background:rgba(231,240,246,.5);}
.rec-item strong{display:block;font-size:16px;font-weight:500;color:var(--ink);}
.rec-item em{display:block;font-style:normal;font-size:14px;color:var(--muted);margin-top:4px;}
.rec-item .go{color:var(--accent);font-size:14px;white-space:nowrap;}
.contact-panel{background:var(--primary-light);border-color:#CFE2ED;}
.contact-panel p{color:var(--primary-deep);font-size:15px;margin-bottom:16px;}
.contact-panel ul{margin-bottom:20px;}
.contact-panel li{
  font-size:14px;color:var(--primary-deep);
  display:flex;justify-content:space-between;gap:12px;
  padding:8px 0;border-bottom:1px dashed rgba(22,64,90,.15);
}
.contact-panel li:last-child{border-bottom:none;}
.contact-panel li span{color:var(--muted);}
.back-row{margin-top:32px;}

/* ---------- footer ---------- */
.footer{background:var(--primary-deep);color:#D7E4EC;margin-top:0;}
.footer .container{padding-top:72px;padding-bottom:28px;}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
}
.footer-brand{
  display:flex;align-items:center;gap:10px;
  font-size:18px;font-weight:700;color:#fff;
}
.footer p{font-size:14px;line-height:1.8;color:#B9CEDC;}
.footer h3{
  font-size:14px;font-weight:600;color:#fff;letter-spacing:.02em;margin-bottom:16px;
}
.footer a{
  display:block;font-size:14px;color:#B9CEDC;padding:5px 0;
  transition:color .2s ease-out;
}
.footer a:hover{color:#fff;text-decoration:underline;}
.footer-bottom{
  margin-top:56px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:#94AFC1;
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  :root{--section-gap:72px;}
  .nav-side{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .brand{position:static;transform:none;margin-right:auto;}
  .nav-wrap{justify-content:space-between;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .tail-grid{grid-template-columns:1fr;}
}
@media (max-width:900px){
  .explain-row{grid-template-columns:1fr;gap:28px;}
  .explain-row .wireframe{order:2;}
}
@media (max-width:767px){
  :root{--section-gap:56px;}
  .container{padding:0 20px;}
  .cat-hero{padding:48px 0 40px;}
  .cat-hero h1{font-size:30px;line-height:1.27;}
  .hero-lead{font-size:16px;}
  .sec-head h2{font-size:24px;}
  .big-grid{grid-template-columns:1fr;}
  .big-card .body{padding:20px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer .container{padding-top:48px;}
  .panel{padding:22px;}
  .brand{font-size:16px;}
  .brand svg{width:22px;height:22px;}
}
@media (max-width:520px){
  .cat-hero h1{font-size:26px;}
  .btn{width:100%;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .link-arrow{justify-content:flex-start;}
}

/* roulang page: article */
:root{
  --primary:#2A6F97;
  --primary-deep:#16405A;
  --primary-tint:#E7F0F6;
  --page:#F7FAFC;
  --card:#FFFFFF;
  --ink:#10242F;
  --sub:#47606E;
  --line:#E2E9EF;
  --accent:#D2803F;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 1px 2px rgba(16,36,47,.04);
  --shadow-2:0 12px 28px rgba(16,36,47,.09);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--page);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.875;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,figure{margin:0}
ul,ol{margin:0}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease-out}
button,input,textarea{font:inherit;color:inherit}
button{border:0;background:none;cursor:pointer}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.container{width:100%;max-width:1200px;margin-inline:auto;padding-inline:24px}
@media (max-width:640px){.container{padding-inline:20px}}

/* ============ header / nav ============ */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid transparent;
  transition:border-color .24s ease-out,box-shadow .24s ease-out;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 1px 2px rgba(16,36,47,.05)}
.nav-wrap{position:relative;display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.nav-left,.nav-right{display:flex;align-items:center;gap:22px}
.brand{
  position:absolute;left:50%;transform:translateX(-50%);
  display:flex;align-items:center;gap:10px;
  color:var(--primary-deep);font-weight:700;font-size:18px;letter-spacing:-.01em;white-space:nowrap;
}
.brand-mark{display:flex;color:var(--primary)}
.nav-link{position:relative;font-size:15px;color:var(--sub);padding:6px 2px;white-space:nowrap}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--primary);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease-out;
}
.nav-link:hover{color:var(--primary-deep)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--primary-deep);font-weight:700;background:var(--primary-tint);border-radius:8px;padding:6px 12px}
.nav-link.active::after{display:none}
.nav-link:focus-visible{outline:2px solid rgba(42,111,151,.35);outline-offset:3px;border-radius:6px}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:13px 26px;border-radius:var(--radius-btn);
  background:var(--primary);color:#fff;font-weight:600;font-size:15px;line-height:1.2;
  transition:background .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
}
.btn-primary:hover{background:#245E80;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:none;box-shadow:none}
.btn-primary:focus-visible{outline:2px solid rgba(42,111,151,.35);outline-offset:2px}
.nav-cta{padding:11px 20px;font-size:14px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
  border:1px solid var(--line);background:#fff;color:var(--primary-deep);
}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;transition:transform .2s ease-out,opacity .2s ease-out}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.mobile-panel{display:none;background:#fff;border-top:1px solid var(--line);box-shadow:var(--shadow-1);max-height:calc(100vh - 72px);overflow:auto}
.mobile-panel.open{display:block}
.mobile-link{display:flex;align-items:center;min-height:48px;font-size:16px;color:var(--sub);border-bottom:1px solid var(--line)}
.mobile-link:hover{color:var(--primary-deep)}
.mobile-cta{width:100%;margin:18px 0 24px}
@media (max-width:1023px){
  .nav-left,.nav-right{display:none}
  .nav-toggle{display:flex}
  .brand{position:static;transform:none}
}
@media (min-width:1024px){
  .mobile-panel{display:none !important}
}

/* ============ article head ============ */
.article-head{padding:36px 0 0;border-bottom:1px solid var(--line);background:#fff}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--sub)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:#B7C6D1}
.breadcrumb .current{color:var(--primary-deep);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-h1{
  font-size:34px;line-height:1.35;font-weight:700;letter-spacing:-.02em;
  color:var(--primary-deep);max-width:920px;margin-top:18px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:var(--sub);margin-top:16px;padding-bottom:28px}
.dot{width:4px;height:4px;border-radius:50%;background:#C3D2DC}
@media (max-width:768px){
  .article-h1{font-size:26px}
  .article-head{padding-top:26px}
}

/* ============ layout ============ */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr);gap:36px;
  padding:40px 0 0;
}
@media (min-width:1024px){
  .article-layout{grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:48px;padding-top:48px}
}

/* ============ article content ============ */
.article-shell{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:32px}
@media (max-width:640px){.article-shell{padding:22px 20px}}
.article-content{font-size:17px;line-height:1.95;color:#1B3644}
.article-content>*:first-child{margin-top:0}
.article-content p{margin:0 0 1.2em}
.article-content h2{
  position:relative;padding-left:16px;margin:2em 0 .8em;
  font-size:23px;line-height:1.5;font-weight:700;color:var(--primary-deep);letter-spacing:-.01em;
}
.article-content h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;border-radius:2px;background:var(--primary);
}
.article-content h3{margin:1.6em 0 .6em;font-size:19px;line-height:1.6;font-weight:700;color:var(--primary-deep)}
.article-content h4{margin:1.4em 0 .5em;font-size:17px;font-weight:700;color:var(--ink)}
.article-content a{color:var(--primary);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.article-content a:hover{color:#1B5578;text-decoration-thickness:2px}
.article-content strong{color:var(--primary-deep)}
.article-content ul,.article-content ol{margin:0 0 1.2em;padding-left:1.35em}
.article-content ul{list-style:none;padding-left:0}
.article-content ul>li{position:relative;padding-left:22px;margin-bottom:.5em}
.article-content ul>li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:2px;background:var(--primary);
}
.article-content ol{list-style:none;counter-reset:olc;padding-left:0}
.article-content ol>li{position:relative;counter-increment:olc;padding-left:40px;margin-bottom:.6em}
.article-content ol>li::before{
  content:counter(olc,decimal-leading-zero);
  position:absolute;left:0;top:.15em;width:28px;height:28px;border-radius:6px;
  display:flex;align-items:center;justify-content:center;
  background:var(--primary-tint);color:var(--primary);font-size:13px;font-weight:700;line-height:1;
}
.article-content blockquote{
  margin:1.6em 0;padding:18px 22px;background:var(--primary-tint);
  border-left:3px solid var(--primary);border-radius:0 var(--radius-img) var(--radius-img) 0;color:#1B3644;
}
.article-content blockquote p:last-child{margin-bottom:0}
.article-content img{border-radius:var(--radius-img);margin:1.4em auto}
.article-content figure{margin:1.6em 0}
.article-content figcaption{margin-top:10px;text-align:center;font-size:13px;color:var(--sub)}
.article-content table{width:100%;border-collapse:collapse;margin:1.5em 0;font-size:15px}
.article-content th,.article-content td{border:1px solid var(--line);padding:12px 14px;text-align:left}
.article-content th{background:var(--primary-tint);color:var(--primary-deep);font-weight:700}
.article-content tr:nth-child(even) td{background:#FAFCFD}
.article-content hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.article-content code{background:var(--primary-tint);border-radius:6px;padding:2px 6px;font-size:15px;color:var(--primary-deep)}

.empty-state{padding:56px 24px;text-align:center}
.empty-icon{width:56px;height:56px;margin:0 auto 18px;border-radius:14px;background:var(--primary-tint);display:flex;align-items:center;justify-content:center;color:var(--primary)}
.empty-state h2{font-size:20px;color:var(--primary-deep);margin-bottom:10px}
.empty-state p{color:var(--sub);font-size:15px;margin-bottom:22px}

.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:32px;padding-top:24px;border-top:1px solid var(--line)}
.tag-label{font-size:13px;letter-spacing:.06em;color:var(--sub)}
.tag{
  display:inline-flex;align-items:center;padding:5px 14px;border-radius:var(--radius-badge);
  background:var(--primary-tint);color:var(--primary);font-size:12px;letter-spacing:.06em;font-weight:600;
}
.tag.accent{background:#FBEEE2;color:#A9611F}

/* ============ sidebar ============ */
.side-inner{display:flex;flex-direction:column;gap:20px}
@media (min-width:1024px){
  .side-sticky{position:sticky;top:96px}
}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:22px}
.side-title{font-size:15px;font-weight:700;color:var(--primary-deep);margin-bottom:14px;letter-spacing:.02em}
.toc-list{list-style:none;padding:0}
.toc-list li+li{border-top:1px solid var(--line)}
.toc-list a{display:block;padding:10px 0;font-size:14px;line-height:1.6;color:var(--sub)}
.toc-list a:hover{color:var(--primary);padding-left:4px}
.side-links{list-style:none;padding:0}
.side-links li+li{border-top:1px solid var(--line)}
.side-links a{display:block;padding:12px 0;font-size:14px;line-height:1.65;color:var(--sub)}
.side-links a:hover{color:var(--primary)}
.side-links span{display:block;font-size:12px;color:#8FA3B0;margin-top:4px}
.side-contact{background:var(--primary-tint);border-color:#D3E3ED}
.side-contact .side-title{color:var(--primary-deep)}
.side-contact p{font-size:14px;color:#2C5468;line-height:1.8;margin-bottom:16px}
.side-contact .btn-primary{width:100%;padding:12px 18px;font-size:14px}

/* ============ prev / next ============ */
.prev-next{display:grid;grid-template-columns:1fr;gap:16px;margin-top:28px}
@media (min-width:768px){.prev-next{grid-template-columns:1fr 1fr}}
.pn-item{
  display:block;padding:20px 22px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-1);
  transition:border-color .24s ease-out,box-shadow .24s ease-out,transform .24s ease-out;
}
.pn-item:hover{border-color:#BCD6E5;box-shadow:var(--shadow-2);transform:translateY(-2px)}
.pn-label{display:block;font-size:12px;letter-spacing:.06em;color:var(--accent);font-weight:600;margin-bottom:8px}
.pn-title{display:block;font-size:16px;line-height:1.65;color:var(--primary-deep);font-weight:600}
.pn-item.right{text-align:right}
@media (max-width:767px){.pn-item.right{text-align:left}}

/* ============ related cards ============ */
.section{padding:72px 0 0}
@media (max-width:768px){.section{padding:52px 0 0}}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:28px}
.section-title{font-size:26px;line-height:1.4;font-weight:700;color:var(--primary-deep);letter-spacing:-.01em}
.section-desc{margin-top:10px;font-size:15px;color:var(--sub);max-width:640px}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--primary)}
.text-link .arrow{transition:transform .2s ease-out}
.text-link:hover .arrow{transform:translateX(4px)}
.text-link:focus-visible{outline:2px solid rgba(42,111,151,.35);outline-offset:3px;border-radius:6px}
.card-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media (min-width:768px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.card-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}}
.card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-1);overflow:hidden;
  transition:border-color .24s ease-out,box-shadow .24s ease-out,transform .24s ease-out;
}
.card:hover{border-color:#BCD6E5;box-shadow:var(--shadow-2);transform:translateY(-2px)}
.card-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--primary-tint)}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.card:hover .card-cover img{transform:scale(1.03)}
.card-body{padding:20px;display:flex;flex-direction:column;flex:1}
.card-badge{
  align-self:flex-start;display:inline-flex;padding:4px 12px;border-radius:var(--radius-badge);
  background:#FBEEE2;color:#A9611F;font-size:12px;letter-spacing:.06em;font-weight:600;margin-bottom:12px;
}
.card-title{
  font-size:17px;line-height:1.6;font-weight:600;color:var(--primary-deep);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-text{
  margin-top:10px;font-size:14px;line-height:1.8;color:var(--sub);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:#8FA3B0;
}
.card-foot .more{color:var(--primary);font-weight:600}

/* ============ CTA ============ */
.cta-panel{
  margin-top:80px;background:var(--primary-deep);color:#fff;border-radius:var(--radius-card);
  padding:48px;display:grid;grid-template-columns:1fr;gap:36px;
}
@media (min-width:1024px){.cta-panel{grid-template-columns:minmax(0,1fr) minmax(0,1fr);padding:56px;gap:56px}}
@media (max-width:640px){.cta-panel{padding:30px 22px;margin-top:56px}}
.cta-panel h2{font-size:27px;line-height:1.45;font-weight:700;color:#fff;letter-spacing:-.01em}
.cta-panel .cta-lead{margin-top:14px;font-size:15px;line-height:1.9;color:#C6DCE8}
.cta-points{list-style:none;padding:0;margin-top:24px}
.cta-points li{position:relative;padding-left:22px;font-size:14px;line-height:1.9;color:#DCEBF3}
.cta-points li+li{margin-top:8px}
.cta-points li::before{content:"";position:absolute;left:0;top:.75em;width:8px;height:8px;border-radius:2px;background:var(--accent)}
.cta-form{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);border-radius:var(--radius-card);padding:26px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;color:#C6DCE8;margin-bottom:8px}
.field input,.field textarea{
  width:100%;min-height:48px;padding:12px 14px;border-radius:var(--radius-btn);
  border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.94);color:var(--ink);
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.field textarea{min-height:96px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:#8FA3B0}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(42,111,151,.25)}
.cta-form .btn-primary{width:100%;background:var(--accent);font-size:16px}
.cta-form .btn-primary:hover{background:#BE7235}
.form-note{margin-top:14px;padding:12px 14px;border-radius:var(--radius-btn);background:rgba(255,255,255,.14);color:#EAF4F9;font-size:14px;line-height:1.7}

/* ============ footer ============ */
.footer{margin-top:88px;background:var(--primary-deep);color:#C6DCE8}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px;padding:60px 0 44px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:18px}
.footer-brand svg{color:#7FB6D4;flex:none}
.footer p{font-size:14px;line-height:1.9;color:#A9C7D8}
.footer h3{font-size:14px;font-weight:700;color:#fff;margin:0 0 16px;letter-spacing:.04em}
.footer a{display:block;font-size:14px;line-height:1.9;color:#A9C7D8;margin-bottom:8px}
.footer a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;
  border-top:1px solid rgba(255,255,255,.14);padding:20px 0 28px;font-size:13px;color:#8FB2C6;
}

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

/* roulang page: category3 */
:root{
  --primary:#2A6F97;
  --primary-dark:#235D80;
  --primary-deep:#16405A;
  --tint:#E7F0F6;
  --bg:#F7FAFC;
  --card:#FFFFFF;
  --ink:#10242F;
  --sub:#47606E;
  --line:#E2E9EF;
  --accent:#D2803F;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 1px 2px rgba(16,36,47,.04);
  --shadow-2:0 12px 28px rgba(16,36,47,.09);
  --space-section:96px;
}
*,*::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 SC",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.875;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font-family:inherit;font-size:inherit}
h1,h2,h3,h4{margin:0;color:var(--primary-deep);font-weight:700;letter-spacing:-.01em}
h1{font-size:40px;line-height:1.2;letter-spacing:-.02em}
h2{font-size:30px;line-height:1.33}
h3{font-size:20px;line-height:1.4;color:var(--ink);font-weight:600}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid rgba(42,111,151,.35);outline-offset:2px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:var(--space-section) 0}
.section-tight{padding:64px 0}
.section-head{max-width:760px;margin-bottom:40px}
.section-lead{color:var(--sub);font-size:16px;line-height:1.9;margin-top:12px}
.eyebrow{display:inline-block;font-size:12px;line-height:20px;letter-spacing:.06em;color:var(--primary);background:rgba(42,111,151,.1);border-radius:999px;padding:4px 14px;font-weight:600}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid transparent;
  transition:box-shadow .2s ease-out,border-color .2s ease-out;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--shadow-1)}
.nav-wrap{position:relative;display:flex;align-items:center;justify-content:space-between;gap:18px;height:72px}
.nav-side{display:flex;align-items:center;gap:20px}
.nav-side.right{justify-content:flex-end}
.brand{
  position:absolute;left:50%;transform:translateX(-50%);
  display:inline-flex;align-items:center;gap:10px;
  color:var(--primary-deep);font-weight:700;font-size:17px;letter-spacing:-.01em;white-space:nowrap;
}
.brand svg{color:var(--primary);flex:0 0 auto}
.nav-link{
  position:relative;display:inline-block;font-size:15px;color:var(--sub);
  padding:7px 2px;transition:color .2s ease-out;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:100%;bottom:2px;height:2px;background:var(--primary);
  transition:right .2s ease-out;
}
.nav-link:hover{color:var(--primary-deep)}
.nav-link:hover::after{right:0}
.nav-link.active{
  color:var(--primary-deep);font-weight:600;background:var(--tint);
  border-radius:8px;padding:7px 14px;
}
.nav-link.active::after{display:none}
.nav-toggle{
  display:none;align-items:center;justify-content:center;width:44px;height:44px;
  border:1px solid var(--line);background:#fff;border-radius:10px;color:var(--primary-deep);cursor:pointer;
}
.nav-toggle:hover{border-color:var(--primary)}
.mobile-menu{display:none;border-top:1px solid var(--line);background:#fff;padding:6px 0 22px}
.mobile-menu.open{display:block}
.mobile-menu a{
  display:block;height:48px;line-height:48px;font-size:16px;color:var(--sub);
  border-bottom:1px solid var(--line);
}
.mobile-menu a.active{color:var(--primary);font-weight:600}
.mobile-menu .btn{width:100%;margin-top:18px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--radius-btn);
  padding:13px 26px;font-size:15px;font-weight:600;cursor:pointer;
  transition:background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
}
.btn:active{transform:none}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-ghost{background:#fff;color:var(--primary);border-color:var(--primary)}
.btn-ghost:hover{background:rgba(42,111,151,.08)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#BC6F32;transform:translateY(-1px)}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:9px}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;color:var(--primary);
  font-weight:600;font-size:15px;transition:color .2s ease-out;
}
.link-arrow i{font-style:normal;transition:transform .2s ease-out}
.link-arrow:hover{color:var(--primary-dark)}
.link-arrow:hover i{transform:translateX(4px)}

/* ============ Hero ============ */
.page-hero{background:var(--tint);border-bottom:1px solid var(--line);padding:72px 0 64px}
.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:center}
.hero-title{margin:18px 0 16px}
.hero-sub{font-size:18px;color:var(--primary-deep);font-weight:600;margin-bottom:14px}
.hero-text{color:var(--sub);font-size:16px;line-height:1.95;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:20px;margin-top:30px}
.hero-stats{display:flex;flex-wrap:wrap;margin-top:40px;border-top:1px solid rgba(42,111,151,.22);padding-top:22px}
.hero-stat{flex:1 1 0;min-width:150px;padding:0 24px;border-left:1px solid rgba(42,111,151,.22)}
.hero-stat:first-child{border-left:0;padding-left:0}
.hero-stat b{display:block;font-size:22px;color:var(--accent);font-weight:700;line-height:1.4}
.hero-stat span{display:block;font-size:14px;color:var(--sub);margin-top:2px}
.hero-panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);padding:28px 26px;
}
.hero-panel h2{font-size:18px;line-height:1.5}
.hero-panel .panel-list{margin-top:16px}
.hero-panel .panel-list li{
  display:flex;justify-content:space-between;gap:14px;
  padding:13px 0;border-bottom:1px solid var(--line);font-size:14px;
}
.hero-panel .panel-list li:last-child{border-bottom:0}
.hero-panel .panel-list span{color:var(--sub)}
.hero-panel .panel-list strong{color:var(--primary-deep);font-weight:600}

/* ============ 横向图文卡 ============ */
.hcard-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.hcard{
  display:flex;gap:20px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:20px;
  transition:border-color .25s ease-out,box-shadow .25s ease-out,transform .25s ease-out;
}
.hcard:hover{border-color:#BBD3E2;box-shadow:var(--shadow-2);transform:translateY(-2px)}
.hcard-pic{flex:0 0 42%;max-width:230px;border-radius:var(--radius-img);overflow:hidden;background:var(--tint)}
.hcard-pic img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/9;transition:transform .3s ease-out}
.hcard:hover .hcard-pic img{transform:scale(1.03)}
.hcard-body{flex:1 1 auto;min-width:0}
.hcard-body h3{margin:8px 0 8px}
.hcard-body p{color:var(--sub);font-size:14px;line-height:1.85}
.hcard-meta{
  margin-top:14px;padding-top:12px;border-top:1px solid var(--line);
  font-size:13px;color:var(--sub);line-height:1.8;
}
.badge{
  display:inline-block;font-size:12px;line-height:20px;letter-spacing:.06em;
  color:var(--accent);background:rgba(210,128,63,.12);border-radius:999px;padding:2px 12px;font-weight:600;
}

/* ============ 对比双栏 ============ */
.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.compare-col{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);padding:28px 26px;
}
.compare-col.is-accent{background:var(--tint);border-color:#CFE1EC;box-shadow:none}
.compare-col h3{font-size:19px;margin-bottom:6px}
.compare-col .col-note{color:var(--sub);font-size:14px;line-height:1.85;margin-bottom:16px}
.compare-row{display:flex;gap:16px;padding:12px 0;border-top:1px solid var(--line);font-size:14px}
.compare-row dt{flex:0 0 96px;color:var(--sub)}
.compare-row dd{flex:1 1 auto;margin:0;color:var(--ink);line-height:1.85}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:48px;align-items:start}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:box-shadow .2s ease-out,border-color .2s ease-out}
.faq-item:hover{border-color:#BBD3E2}
.faq-item[open]{box-shadow:var(--shadow-1)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:12px 20px;font-size:16px;font-weight:600;color:var(--primary-deep);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-mark{position:relative;width:16px;height:16px;flex:0 0 16px}
.faq-mark::before,.faq-mark::after{
  content:"";position:absolute;background:var(--primary);border-radius:1px;
  transition:transform .2s ease-out,opacity .2s ease-out;
}
.faq-mark::before{left:0;top:7px;width:16px;height:2px}
.faq-mark::after{top:0;left:7px;width:2px;height:16px}
.faq-item[open] .faq-mark::after{transform:rotate(90deg);opacity:0}
.faq-item[open] summary{background:#F2F7FA;border-bottom:1px solid var(--line)}
.faq-body{padding:16px 20px 20px;background:#FBFDFE;color:var(--sub);font-size:15px;line-height:1.95}

/* ============ 页尾服务区 ============ */
.tail-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:32px;align-items:start}
.link-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);overflow:hidden}
.link-list a{
  display:flex;align-items:baseline;justify-content:space-between;gap:18px;
  padding:18px 24px;border-bottom:1px solid var(--line);transition:background-color .2s ease-out;
}
.link-list a:last-child{border-bottom:0}
.link-list a:hover{background:#F4F9FC}
.link-list b{font-size:16px;color:var(--primary-deep);font-weight:600}
.link-list span{font-size:14px;color:var(--sub);line-height:1.8;text-align:right}
.contact-card{
  background:var(--tint);border:1px solid #CFE1EC;border-radius:var(--radius-card);
  padding:28px 26px;
}
.contact-card p{color:var(--sub);font-size:15px;line-height:1.9;margin-bottom:18px}
.contact-card .k{color:var(--primary-deep);font-weight:600}
.back-row{margin-top:32px;display:flex;flex-wrap:wrap;gap:16px;align-items:center}

/* ============ 页脚 ============ */
.footer{background:var(--primary-deep);color:#C7D8E3;padding:64px 0 0;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer h3{color:#fff;font-size:14px;font-weight:600;margin:0 0 14px;letter-spacing:.04em}
.footer a{display:block;color:#C7D8E3;font-size:14px;padding:6px 0;transition:color .18s ease-out}
.footer a:hover{color:#fff;text-decoration:underline}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px}
.footer p{font-size:14px;line-height:1.85;color:#A9C1D0;margin:0 0 6px}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  border-top:1px solid rgba(255,255,255,.14);margin-top:48px;padding:20px 0;
  font-size:13px;color:#8FAAC0;
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  :root{--space-section:64px}
  .nav-side{display:none}
  .nav-toggle{display:inline-flex}
  .brand{position:static;transform:none;font-size:16px}
  .nav-wrap{justify-content:space-between;height:64px}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:32px}
  .hero-actions{margin-top:24px}
  .hcard-grid{grid-template-columns:minmax(0,1fr)}
  .compare-grid{grid-template-columns:minmax(0,1fr)}
  .faq-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .tail-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  :root{--space-section:56px}
  h1{font-size:30px;line-height:1.27}
  h2{font-size:24px;line-height:1.35}
  h3{font-size:18px;line-height:1.45}
  .container{padding:0 20px}
  .page-hero{padding:48px 0 44px}
  .hero-stat{flex:1 1 100%;padding:14px 0;border-left:0;border-top:1px solid rgba(42,111,151,.22)}
  .hero-stat:first-child{border-top:0;padding-top:0}
  .hcard{flex-direction:column;gap:16px}
  .hcard-pic{flex:0 0 auto;max-width:100%;width:100%}
  .hero-panel{padding:22px 20px}
  .link-list a{flex-direction:column;align-items:flex-start;gap:6px}
  .link-list span{text-align:left}
}
@media (max-width:639px){
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .btn{width:100%}
  .hero-actions{gap:14px}
  .back-row .btn{width:100%}
}

/* roulang page: category2 */
:root{
  --primary:#2A6F97;
  --primary-hover:#215A7B;
  --primary-deep:#16405A;
  --primary-light:#E7F0F6;
  --page:#F7FAFC;
  --card:#FFFFFF;
  --ink:#10242F;
  --sub:#47606E;
  --line:#E2E9EF;
  --accent:#D2803F;
  --accent-hover:#B96C2F;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 1px 2px rgba(16,36,47,.04);
  --shadow-2:0 12px 28px rgba(16,36,47,.09);
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
.site-body{
  margin:0;
  font-family:var(--font-cn);
  background:var(--page);
  color:var(--ink);
  font-size:16px;
  line-height:1.875;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
.site-body a{color:inherit;text-decoration:none}
.site-body img{display:block;max-width:100%;height:auto}
.site-body button,.site-body input,.site-body textarea,.site-body select{font-family:inherit;font-size:inherit;color:inherit}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ============ 页头导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid transparent;
  transition:box-shadow .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 1px 2px rgba(16,36,47,.07)}
.nav-wrap{
  height:72px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;
}
.nav-side{display:flex;align-items:center;gap:2px}
.nav-side.right{justify-content:flex-end}
.nav-link{
  position:relative;display:inline-block;font-size:15px;color:var(--sub);
  padding:8px 11px;border-radius:10px;white-space:nowrap;
  transition:color .2s ease,background-color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:11px;right:11px;bottom:3px;height:2px;background:var(--primary);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-link:hover{color:var(--primary-deep)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{font-weight:600;color:var(--primary-deep);background:var(--primary-light)}
.nav-link.active::after{transform:scaleX(0)}
.nav-link:focus-visible{outline:2px solid rgba(42,111,151,.25);outline-offset:2px}
.brand{
  display:inline-flex;align-items:center;gap:10px;justify-self:center;
  font-size:18px;font-weight:700;letter-spacing:-.01em;color:var(--primary-deep);white-space:nowrap;
}
.brand svg{color:var(--primary);flex:none}
.nav-cta{margin-left:10px;padding:10px 20px;font-size:14px}
.nav-toggle{
  display:none;width:42px;height:42px;margin-left:8px;border:1px solid var(--line);border-radius:10px;
  background:#fff;align-items:center;justify-content:center;cursor:pointer;color:var(--primary-deep);
}
.nav-toggle:focus-visible{outline:2px solid rgba(42,111,151,.25);outline-offset:2px}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-menu{display:none;background:#fff;border-top:1px solid var(--line);padding:4px 20px 22px}
.mobile-menu.open{display:block}
.mobile-menu a{
  display:flex;align-items:center;height:48px;font-size:16px;color:var(--sub);
  border-bottom:1px solid var(--line);transition:color .2s ease,padding-left .2s ease;
}
.mobile-menu a:hover,.mobile-menu a.active{color:var(--primary-deep);font-weight:600;padding-left:4px}
.mobile-menu .btn{margin-top:18px;height:48px;width:100%;border-bottom:0}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;padding:14px 26px;border-radius:var(--radius-btn);
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background-color .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:none;box-shadow:none}
.btn-primary:focus-visible{outline:2px solid rgba(42,111,151,.25);outline-offset:2px}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-hover);transform:translateY(-1px)}
.btn-accent:active{transform:none}
.btn-accent:focus-visible{outline:2px solid rgba(210,128,63,.3);outline-offset:2px}
.btn-outline{background:#fff;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:rgba(42,111,151,.08)}
.btn-outline:focus-visible{outline:2px solid rgba(42,111,151,.25);outline-offset:2px}
.link-btn{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-weight:600;font-size:15px}
.link-btn span{transition:transform .2s ease;display:inline-block}
.link-btn:hover{color:var(--primary-hover)}
.link-btn:hover span{transform:translateX(4px)}
.link-btn:focus-visible{outline:2px solid rgba(42,111,151,.25);outline-offset:3px;border-radius:6px}

/* ============ 通用排版 ============ */
.section{padding:96px 0}
.section-tight{padding:64px 0}
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.06em;line-height:20px;
  color:var(--primary);background:var(--primary-light);border-radius:999px;padding:2px 12px;font-weight:600;
}
.h2{
  font-size:30px;line-height:40px;font-weight:700;letter-spacing:-.02em;
  color:var(--primary-deep);margin:16px 0 0;
}
.lead{font-size:16px;line-height:30px;color:var(--sub);margin:14px 0 0;max-width:720px}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ============ 首屏 ============ */
.hero{
  position:relative;padding:48px 0 64px;border-bottom:1px solid var(--line);
  background-color:#EDF4F8;
  background-image:linear-gradient(180deg,rgba(247,250,252,.78),rgba(247,250,252,.95)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.hero-inner{
  display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:48px;align-items:center;min-height:480px;
}
.breadcrumb{font-size:13px;line-height:24px;color:var(--sub);margin-bottom:18px}
.breadcrumb a{color:var(--sub);transition:color .2s ease}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{margin:0 8px;color:#A9BCC8}
.hero h1{
  font-size:40px;line-height:48px;font-weight:700;letter-spacing:-.02em;color:var(--primary-deep);margin:0;
}
.hero-sub{font-size:18px;line-height:30px;color:var(--primary);font-weight:600;margin:16px 0 0}
.hero-text{font-size:16px;line-height:30px;color:var(--sub);margin:10px 0 0;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:22px;margin-top:32px}
.hero-media{position:relative}
.hero-media img{
  position:relative;z-index:1;width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--radius-img);background:#DCE9F2;
}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:0;margin-top:40px;border-top:1px solid var(--line);padding-top:20px;
}
.hero-facts div{
  flex:1 1 0;min-width:140px;padding-right:20px;border-right:1px solid var(--line);
}
.hero-facts div:last-child{border-right:0;padding-right:0}
.hero-facts strong{display:block;font-size:20px;color:var(--primary-deep);font-weight:700;line-height:28px}
.hero-facts span{display:block;font-size:13px;color:var(--sub);line-height:22px;margin-top:2px}

/* ============ 锚点导航 ============ */
.anchor-wrap{position:sticky;top:96px}
.anchor-nav{border-left:3px solid var(--line)}
.anchor-link{
  display:block;padding:12px 16px;margin-left:-3px;border-left:3px solid transparent;
  font-size:15px;color:var(--sub);transition:color .2s ease,background-color .2s ease,border-color .2s ease;
}
.anchor-link:hover{color:var(--primary);background:rgba(231,240,246,.6)}
.anchor-link.active{
  color:var(--primary-deep);font-weight:600;border-left-color:var(--primary);background:var(--primary-light);
}
.anchor-note{
  margin-top:24px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  font-size:13px;line-height:24px;color:var(--sub);box-shadow:var(--shadow-1);
}
.anchor-note strong{display:block;color:var(--primary-deep);font-size:14px;margin-bottom:6px}

/* ============ 交替图文流 ============ */
.flow-item{
  display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);
  gap:36px;align-items:center;padding:40px 0;border-bottom:1px solid var(--line);
}
.flow-item:last-child{border-bottom:0;padding-bottom:0}
.flow-item:first-child{padding-top:0}
.flow-item.reverse{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.flow-item.reverse .flow-media{order:2}
.flow-item.reverse .flow-body{order:1}
.flow-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-img);
  background:#DCE9F2;box-shadow:var(--shadow-1);
}
.flow-body h3{font-size:20px;line-height:28px;font-weight:600;color:var(--primary-deep);margin:0}
.flow-body p{font-size:15px;line-height:28px;color:var(--sub);margin:12px 0 0}
.point-list{list-style:none;margin:18px 0 0;padding:0}
.point-list li{
  position:relative;padding-left:22px;font-size:15px;line-height:26px;color:var(--ink);margin-bottom:10px;
}
.point-list li::before{
  content:"";position:absolute;left:0;top:10px;width:8px;height:8px;background:var(--primary);border-radius:2px;
}
.flow-body .link-btn{margin-top:20px}

/* ============ 步骤时间线 ============ */
.step-list{list-style:none;margin:32px 0 0;padding:0}
.step-item{
  display:grid;grid-template-columns:72px 1fr;gap:24px;padding:26px 0;border-bottom:1px solid var(--line);
}
.step-item:last-child{border-bottom:0}
.step-num{
  width:52px;height:52px;display:flex;align-items:center;justify-content:center;
  background:var(--primary-light);color:var(--primary-deep);border-radius:var(--radius-btn);
  font-size:17px;font-weight:700;letter-spacing:.02em;
}
.step-body h3{font-size:18px;line-height:28px;font-weight:600;color:var(--primary-deep);margin:0}
.step-body p{font-size:15px;line-height:28px;color:var(--sub);margin:8px 0 0}
.step-meta{display:inline-block;margin-top:10px;font-size:12px;letter-spacing:.06em;color:var(--accent);font-weight:600}

/* ============ FAQ ============ */
.faq-list{margin-top:32px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:14px;overflow:hidden;
  box-shadow:var(--shadow-1);transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:#CFE0EB;box-shadow:var(--shadow-2)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:16px 22px;font-size:17px;font-weight:600;color:var(--primary-deep);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-size:22px;line-height:1;color:var(--primary);flex:none;transition:transform .2s ease;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item summary:focus-visible{outline:2px solid rgba(42,111,151,.25);outline-offset:-3px}
.faq-body{
  padding:16px 22px 22px;background:#F4F8FB;border-top:1px solid var(--line);
  font-size:15px;line-height:28px;color:var(--sub);
}

/* ============ 相关阅读 / 联系卡 ============ */
.link-list{list-style:none;margin:0;padding:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-1)}
.link-row{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 26px;border-bottom:1px solid var(--line);transition:background-color .2s ease;
}
.link-row:last-child{border-bottom:0}
.link-row:hover{background:#F4F8FB}
.link-row .row-main{min-width:0}
.link-row .row-tag{font-size:12px;letter-spacing:.06em;color:var(--accent);font-weight:600}
.link-row .row-title{font-size:16px;line-height:26px;color:var(--primary-deep);font-weight:600;margin-top:4px}
.link-row .row-desc{font-size:14px;line-height:24px;color:var(--sub);margin-top:2px}
.link-row .row-arrow{color:var(--primary);font-size:18px;flex:none;transition:transform .2s ease}
.link-row:hover .row-arrow{transform:translateX(4px)}
.contact-card{
  background:var(--primary-light);border:1px solid #D3E4EF;border-radius:var(--radius-card);
  padding:30px;height:100%;
}
.contact-card h3{font-size:18px;line-height:28px;font-weight:600;color:var(--primary-deep);margin:0}
.contact-card ul{list-style:none;margin:18px 0 0;padding:0}
.contact-card li{
  font-size:14px;line-height:26px;color:var(--sub);padding:10px 0;border-bottom:1px solid rgba(42,111,151,.15);
}
.contact-card li:last-child{border-bottom:0}
.contact-card .btn{margin-top:22px;width:100%}

/* ============ 底部 CTA ============ */
.cta-panel{
  background:var(--primary-deep);border-radius:20px;padding:52px;
  display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6fr);gap:48px;align-items:start;
}
.cta-panel h2{font-size:30px;line-height:40px;font-weight:700;letter-spacing:-.02em;color:#fff;margin:0}
.cta-panel .cta-text{font-size:16px;line-height:30px;color:rgba(255,255,255,.76);margin:16px 0 0}
.cta-panel .cta-actions{display:flex;flex-wrap:wrap;gap:18px;align-items:center;margin-top:28px}
.cta-panel .link-btn{color:#fff}
.cta-panel .link-btn:hover{color:#F0C79B}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;line-height:24px;color:rgba(255,255,255,.82);margin-bottom:8px}
.field input,.field textarea{
  width:100%;height:48px;padding:0 14px;border-radius:var(--radius-btn);
  border:1px solid #D8E1E8;background:#fff;color:var(--ink);font-size:15px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:96px;padding:12px 14px;line-height:24px;resize:vertical}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(42,111,151,.25)}
.form-tip{
  display:none;margin-top:14px;padding:12px 16px;border-radius:var(--radius-btn);
  background:var(--primary-light);color:var(--primary-deep);font-size:14px;line-height:24px;
}

/* ============ 页脚 ============ */
.footer{background:var(--primary-deep);color:rgba(255,255,255,.72);margin-top:0;padding:72px 0 0}
.footer-grid{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:40px;padding-bottom:48px;
}
.footer-grid h3{font-size:14px;font-weight:600;color:#fff;margin:0 0 18px;letter-spacing:.02em}
.footer-grid p{font-size:14px;line-height:26px;color:rgba(255,255,255,.72);margin:0 0 8px}
.footer-grid a{
  display:block;font-size:14px;line-height:24px;color:rgba(255,255,255,.72);
  padding:5px 0;transition:color .2s ease;
}
.footer-grid a:hover{color:#fff;text-decoration:underline}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff}
.footer-brand svg{color:#8BB8D2;flex:none}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.16);padding:22px 0 28px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;line-height:24px;color:rgba(255,255,255,.6);
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-wrap{height:64px;grid-template-columns:auto 1fr auto}
  .nav-side{display:none}
  .nav-right .nav-link,.nav-right .nav-cta{display:none}
  .nav-toggle{display:inline-flex}
  .brand{font-size:17px}
  .hero{padding:32px 0 48px}
  .hero-inner{grid-template-columns:1fr;gap:32px;min-height:0}
  .hero h1{font-size:30px;line-height:38px}
  .hero-media::before{display:none}
  .section{padding:56px 0}
  .section-tight{padding:44px 0}
  .h2{font-size:24px;line-height:34px}
  .anchor-wrap{position:static}
  .anchor-nav{display:flex;flex-wrap:wrap;border-left:0;border-bottom:2px solid var(--line)}
  .anchor-link{
    margin-left:0;border-left:0;border-bottom:2px solid transparent;margin-bottom:-2px;padding:10px 14px;
  }
  .anchor-link.active{border-left:0;border-bottom-color:var(--primary);background:transparent}
  .flow-item,.flow-item.reverse{grid-template-columns:1fr;gap:22px;padding:32px 0}
  .flow-item.reverse .flow-media{order:0}
  .flow-item.reverse .flow-body{order:0}
  .cta-panel{grid-template-columns:1fr;padding:32px;gap:28px}
  .cta-panel h2{font-size:24px;line-height:34px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}
@media (max-width:639px){
  .container{padding:0 20px}
  .hero h1{font-size:27px;line-height:36px}
  .hero-sub{font-size:16px;line-height:28px}
  .hero-actions{gap:16px}
  .hero-actions .btn{width:100%}
  .hero-actions .link-btn{width:100%;justify-content:flex-start}
  .hero-facts div{flex:1 1 100%;border-right:0;border-bottom:1px solid var(--line);padding:12px 0}
  .hero-facts div:last-child{border-bottom:0}
  .step-item{grid-template-columns:56px 1fr;gap:16px}
  .step-num{width:44px;height:44px;font-size:15px}
  .link-row{padding:18px 20px}
  .footer-grid{grid-template-columns:1fr}
  .footer{padding-top:52px}
  .cta-panel{padding:26px 22px}
}

/* roulang page: category5 */
:root{
  --primary:#2A6F97;
  --primary-dark:#1F5B7D;
  --primary-deep:#16405A;
  --primary-soft:#E7F0F6;
  --bg:#F7FAFC;
  --card:#FFFFFF;
  --ink:#10242F;
  --sub:#47606E;
  --line:#E2E9EF;
  --accent:#D2803F;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 1px 2px rgba(16,36,47,.04);
  --shadow-2:0 12px 28px rgba(16,36,47,.09);
  --section-gap:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.875;
  letter-spacing:.005em;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius-img)}
a{color:var(--primary);text-decoration:none}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--primary-deep);letter-spacing:-.012em;font-weight:700}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
body .container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
.section{padding:var(--section-gap) 0}
.section-tight{padding:64px 0}
.section-soft{background:var(--primary-soft)}
.eyebrow{display:inline-block;font-size:12px;line-height:20px;letter-spacing:.06em;color:var(--accent);font-weight:600;margin-bottom:14px}
.h1{font-size:clamp(30px,4.2vw,40px);line-height:1.2;letter-spacing:-.02em}
.h2{font-size:clamp(24px,3vw,30px);line-height:1.32}
.h3{font-size:20px;line-height:1.4}
.lead{font-size:17px;line-height:1.9;color:var(--sub)}
.muted{color:var(--sub)}
.small{font-size:14px;line-height:1.75}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid transparent;transition:box-shadow .22s ease-out,border-color .22s ease-out}
.site-header.scrolled{border-bottom-color:var(--line);box-shadow:var(--shadow-1)}
.nav-wrap{position:relative;display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);display:inline-flex;align-items:center;gap:9px;color:var(--primary-deep);font-weight:700;font-size:19px;white-space:nowrap;text-decoration:none}
.brand svg{color:var(--primary);flex:0 0 auto}
.nav-side{display:flex;align-items:center;gap:2px}
.nav-link{position:relative;display:inline-flex;align-items:center;height:38px;padding:0 12px;border-radius:8px;color:var(--sub);font-size:15px;text-decoration:none;transition:color .2s ease-out,background-color .2s ease-out}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:5px;height:2px;background:var(--primary);transform:scaleX(0);transform-origin:left center;transition:transform .2s ease-out}
.nav-link:hover{color:var(--primary-deep)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--primary-deep);font-weight:600;background:var(--primary-soft)}
.nav-link.active::after{transform:scaleX(0)}
.nav-link:focus-visible{outline:none;box-shadow:0 0 0 2px rgba(42,111,151,.25)}
.nav-cta{display:inline-flex;align-items:center;height:40px;margin-left:10px;padding:0 20px;border-radius:var(--radius-btn);background:var(--primary);color:#fff;font-size:15px;font-weight:600;text-decoration:none;transition:background-color .2s ease-out,transform .2s ease-out}
.nav-cta:hover{background:var(--primary-dark);transform:translateY(-1px)}
.nav-cta:active{transform:none}
.nav-toggle{display:none;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--primary-deep);border-radius:2px;position:relative;transition:background-color .2s ease-out}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--primary-deep);border-radius:2px;transition:transform .2s ease-out}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg)}
.mobile-panel{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);box-shadow:var(--shadow-2);padding:8px 0 20px}
.mobile-panel.open{display:block}
.mobile-panel a{display:flex;align-items:center;height:48px;padding:0 24px;border-bottom:1px solid var(--line);color:var(--ink);font-size:16px;text-decoration:none}
.mobile-panel a.active{color:var(--primary-deep);font-weight:600;background:var(--primary-soft)}
.mobile-panel .mobile-cta{margin:16px 24px 0;height:48px;justify-content:center;border:0;border-radius:var(--radius-btn);background:var(--primary);color:#fff;font-weight:600}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 26px;border-radius:var(--radius-btn);border:1px solid transparent;font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;text-decoration:none;transition:background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px)}
.btn-primary:active{transform:none}
.btn-ghost{background:#fff;color:var(--primary);border-color:var(--primary)}
.btn-ghost:hover{background:rgba(42,111,151,.08)}
.btn-ghost:active{transform:none}
.btn-light{background:#fff;color:var(--primary-deep)}
.btn-light:hover{background:#EAF3F8;transform:translateY(-1px)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#BE7033;transform:translateY(-1px)}
.btn:focus-visible{outline:none;box-shadow:0 0 0 2px rgba(42,111,151,.25)}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--primary);text-decoration:none}
.text-link .arrow{transition:transform .2s ease-out}
.text-link:hover{color:var(--primary-dark)}
.text-link:hover .arrow{transform:translateX(4px)}

/* hero */
.hero{position:relative;overflow:hidden;background:var(--primary-soft);border-bottom:1px solid var(--line)}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;opacity:.16}
.hero-inner{position:relative;padding:70px 0 66px;max-width:800px}
.hero h1{max-width:18em}
.hero .lead{margin-top:18px;max-width:640px}
.hero-note{margin-top:14px;max-width:660px;font-size:15px;line-height:1.9;color:var(--sub)}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:30px}
.hero-meta{display:flex;flex-wrap:wrap;gap:0;margin-top:38px;border-top:1px solid rgba(42,111,151,.18);padding-top:20px}
.hero-meta div{flex:1 1 160px;padding-right:24px;border-right:1px solid rgba(42,111,151,.18)}
.hero-meta div:last-child{border-right:0}
.hero-meta strong{display:block;font-size:22px;color:var(--accent);letter-spacing:-.01em}
.hero-meta span{font-size:14px;color:var(--sub)}

/* section head */
.sec-head{max-width:720px;margin-bottom:40px}
.sec-head .lead{margin-top:14px}

/* compare table */
.table-scroll{overflow-x:auto;border-radius:var(--radius-card);border:1px solid var(--line);background:#fff;box-shadow:var(--shadow-1)}
.compare-table{width:100%;min-width:680px;border-collapse:collapse;font-size:15px}
.compare-table caption{text-align:left;padding:18px 20px 0;font-size:14px;color:var(--sub)}
.compare-table thead th{background:var(--primary-soft);color:var(--primary-deep);font-size:14px;font-weight:600;letter-spacing:.02em;text-align:left;padding:16px 20px;border-bottom:1px solid var(--line)}
.compare-table tbody th,.compare-table tbody td{padding:16px 20px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.8}
.compare-table tbody th{width:22%;font-weight:600;color:var(--ink);font-size:14px;background:#FCFDFE}
.compare-table tbody td{color:var(--sub)}
.compare-table tbody tr:nth-child(even){background:#FAFCFD}
.compare-table tbody tr:last-child th,.compare-table tbody tr:last-child td{border-bottom:0}
.compare-foot{margin-top:18px;font-size:14px;color:var(--sub)}

/* faq */
.faq-list{display:grid;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-1);overflow:hidden;transition:border-color .2s ease-out,box-shadow .2s ease-out}
.faq-item[open]{border-color:#BED7E5;box-shadow:var(--shadow-2)}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:56px;padding:14px 20px;cursor:pointer;list-style:none;font-size:16px;font-weight:600;color:var(--ink);line-height:1.6}
.faq-item summary::-webkit-details-marker{display:none}
.plus{position:relative;flex:0 0 14px;width:14px;height:14px}
.plus::before,.plus::after{content:"";position:absolute;background:var(--primary);border-radius:2px;transition:transform .2s ease-out}
.plus::before{left:0;top:6px;width:14px;height:2px}
.plus::after{left:6px;top:0;width:2px;height:14px}
.faq-item[open] .plus::after{transform:scaleY(0)}
.faq-body{padding:16px 20px 20px;border-top:1px solid var(--line);background:#FBFDFE;color:var(--sub);font-size:15px;line-height:1.9}
.faq-body strong{color:var(--ink)}

/* form */
.form-panel{display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:start}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:32px}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.field{display:flex;flex-direction:column}
.field.full{grid-column:1 / -1}
.field label{font-size:14px;font-weight:600;color:var(--ink);margin-bottom:8px}
.field input,.field textarea{width:100%;padding:0 14px;height:48px;border:1px solid #D8E1E8;border-radius:var(--radius-btn);background:#fff;font-size:15px;color:var(--ink);transition:border-color .2s ease-out,box-shadow .2s ease-out}
.field textarea{height:auto;min-height:128px;padding:12px 14px;line-height:1.8;resize:vertical}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(42,111,151,.25)}
.field .hint{margin-top:6px;font-size:13px;color:var(--sub)}
.form-actions{grid-column:1 / -1;display:flex;flex-wrap:wrap;align-items:center;gap:16px}
.form-tip{display:none;grid-column:1 / -1;background:var(--primary-soft);border:1px solid #C8DFEC;border-radius:var(--radius-btn);padding:14px 16px;font-size:14px;color:var(--primary-deep)}
.form-tip.show{display:block}
.side-card{background:var(--primary-soft);border:1px solid #CFE2EE;border-radius:var(--radius-card);padding:28px}
.side-card h3{font-size:17px;margin-bottom:14px}
.side-list li{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid rgba(42,111,151,.16);font-size:14px;color:var(--sub)}
.side-list li:last-child{border-bottom:0}
.side-list b{color:var(--ink);font-weight:600}
.side-card .btn{margin-top:20px;width:100%}

/* cards */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);overflow:hidden;transition:border-color .28s ease-out,box-shadow .28s ease-out,transform .28s ease-out}
.card:hover{border-color:#BED7E5;box-shadow:var(--shadow-2);transform:translateY(-2px)}
.card-cover{position:relative;overflow:hidden;aspect-ratio:16 / 9;background:var(--primary-soft)}
.card-cover img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .3s ease-out}
.card:hover .card-cover img{transform:scale(1.03)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.badge{align-self:flex-start;display:inline-block;padding:3px 12px;border-radius:999px;background:rgba(210,128,63,.12);color:#9C5A24;font-size:12px;line-height:20px;letter-spacing:.06em;font-weight:600}
.card-title{font-size:17px;line-height:1.5;font-weight:600;color:var(--primary-deep)}
.card-text{font-size:14px;line-height:1.8;color:var(--sub)}
.card-foot{margin-top:auto;padding-top:12px;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-size:13px;color:var(--sub)}
.card-link{color:var(--primary)}

/* back row */
.back-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;margin-top:40px;padding-top:28px;border-top:1px solid var(--line)}

/* footer */
.footer{background:var(--primary-deep);color:#C6DCE9;padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer h3{color:#fff;font-size:14px;font-weight:600;margin:0 0 14px;letter-spacing:.02em}
.footer p{font-size:14px;line-height:1.9;color:#AFCBDC}
.footer a{display:block;color:#C6DCE9;font-size:14px;line-height:2;text-decoration:none;transition:color .2s ease-out}
.footer a:hover{color:#fff;text-decoration:underline}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px}
.footer-brand svg{color:#7FB3CE;flex:0 0 auto}
.footer .mt-4{margin-top:16px}
.footer-bottom{margin-top:44px;border-top:1px solid rgba(255,255,255,.14);padding:20px 0;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:13px;color:#9FBDCD}

@media (max-width:1024px){
  :root{--section-gap:72px}
  .form-panel{grid-template-columns:1fr}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:991px){
  .nav-side{display:none}
  .nav-toggle{display:inline-flex}
  .brand{position:static;transform:none;font-size:17px}
  .nav-wrap{height:64px;justify-content:space-between}
  .hero-inner{padding:52px 0 50px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  :root{--section-gap:56px}
  body .container{padding-left:20px;padding-right:20px}
  .form-grid{grid-template-columns:1fr}
  .form-card{padding:24px}
  .card-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero-meta div{flex:1 1 100%;border-right:0;border-bottom:1px solid rgba(42,111,151,.18);padding:12px 0}
  .hero-meta div:last-child{border-bottom:0}
  .compare-table{min-width:600px}
}
@media (max-width:520px){
  .brand{font-size:15px;gap:7px}
  .hero-actions{gap:12px}
  .hero-actions .btn{width:100%}
  .hero-meta strong{font-size:20px}
}

/* roulang page: category4 */
:root{
    --primary:#2A6F97;
    --primary-deep:#16405A;
    --primary-light:#E7F0F6;
    --page:#F7FAFC;
    --card:#FFFFFF;
    --ink:#10242F;
    --muted:#47606E;
    --line:#E2E9EF;
    --accent:#D2803F;
    --radius-card:16px;
    --radius-btn:10px;
    --radius-img:12px;
    --shadow-soft:0 1px 2px rgba(16,36,47,.04);
    --shadow-lift:0 12px 28px rgba(16,36,47,.09);
    --space-section:96px;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--page);
    color:var(--ink);
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.875;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;height:auto;display:block}
  a{color:var(--primary);text-decoration:none;transition:color .2s ease}
  a:hover{color:#1d5878}
  button,input,textarea,select{font:inherit;color:inherit}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0}
  ul,ol{padding:0;list-style:none}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
  .section{padding:var(--space-section) 0}
  .section-tight{padding:64px 0}
  .section-line{border-top:1px solid var(--line)}

  /* ---------- 导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;background:#fff;
    border-bottom:1px solid transparent;
    transition:box-shadow .22s ease,border-color .22s ease;
  }
  .site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 1px 2px rgba(16,36,47,.06)}
  .header-inner{position:relative;display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px}
  .nav-side{display:flex;align-items:center;gap:26px}
  .nav-side.right{justify-content:flex-end}
  .nav-link{
    position:relative;font-size:15px;color:var(--muted);padding:6px 2px;white-space:nowrap;
  }
  .nav-link::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--primary);
    transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
  }
  .nav-link:hover{color:var(--primary-deep)}
  .nav-link:hover::after{transform:scaleX(1)}
  .nav-link.active{
    color:var(--primary-deep);font-weight:600;background:var(--primary-light);
    border-radius:8px;padding:6px 12px;
  }
  .nav-link.active::after{display:none}

  .brand{
    position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
    display:inline-flex;align-items:center;gap:10px;
    font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap;
  }
  .brand:hover{color:var(--primary-deep)}
  .brand svg{color:var(--primary);flex:none}

  .nav-cta{padding:10px 20px;font-size:14px}

  .nav-toggle{
    display:none;align-items:center;justify-content:center;
    width:42px;height:42px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;
  }
  .nav-toggle:hover{border-color:#BBD5E4}
  .nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative}
  .nav-toggle span::before,.nav-toggle span::after{
    content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);
  }
  .nav-toggle span::before{top:-6px}
  .nav-toggle span::after{top:6px}

  .mobile-menu{display:none;border-top:1px solid var(--line);background:#fff}
  .mobile-menu.open{display:block}
  .mobile-menu a{
    display:flex;align-items:center;height:48px;padding:0 24px;color:var(--ink);
    font-size:16px;border-bottom:1px solid var(--line);
  }
  .mobile-menu a:hover{background:var(--primary-light);color:var(--primary-deep)}
  .mobile-menu a.mm-active{color:var(--primary);font-weight:600}
  .mobile-menu .mm-cta{
    display:block;height:auto;margin:16px 24px 24px;padding:14px 20px;text-align:center;
    background:var(--primary);color:#fff;border-radius:var(--radius-btn);border-bottom:none;font-weight:600;
  }
  .mobile-menu .mm-cta:hover{background:#1d5878;color:#fff}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:var(--radius-btn);border:1px solid transparent;cursor:pointer;
    font-size:15px;font-weight:600;padding:13px 26px;line-height:1.2;
    transition:background-color .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .btn:focus-visible{outline:none;box-shadow:0 0 0 2px rgba(42,111,151,.25)}
  .btn-primary{background:var(--primary);color:#fff}
  .btn-primary:hover{background:#1d5878;color:#fff;transform:translateY(-1px)}
  .btn-primary:active{transform:none}
  .btn-secondary{background:#fff;color:var(--primary);border-color:var(--primary)}
  .btn-secondary:hover{background:rgba(42,111,151,.08);transform:translateY(-1px)}
  .btn-secondary:active{transform:none}
  .btn-accent{background:var(--accent);color:#fff}
  .btn-accent:hover{background:#bd6f31;color:#fff;transform:translateY(-1px)}
  .btn-accent:active{transform:none}
  .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
  .btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;transform:translateY(-1px)}
  .btn-ghost:active{transform:none}
  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-weight:600;font-size:15px;
  }
  .link-arrow i{font-style:normal;transition:transform .2s ease}
  .link-arrow:hover i{transform:translateX(4px)}

  /* ---------- 标题体系 ---------- */
  .h2{font-size:30px;line-height:1.35;font-weight:700;color:var(--ink);letter-spacing:-.01em}
  .h3{font-size:20px;line-height:1.4;font-weight:600;color:var(--ink)}
  .lead{font-size:16px;color:var(--muted);line-height:1.9}
  .eyebrow{
    display:inline-block;font-size:12px;letter-spacing:.06em;color:var(--primary);
    background:var(--primary-light);border-radius:999px;padding:5px 14px;font-weight:600;
  }

  /* ---------- 分类首屏 ---------- */
  .cat-hero{position:relative;overflow:hidden;background:#F1F7FB;border-bottom:1px solid var(--line)}
  .cat-hero-bg{
    position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-2.png');
    background-size:cover;background-position:center right;opacity:.16;
  }
  .cat-hero::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(90deg,rgba(247,250,252,.96) 0%,rgba(247,250,252,.86) 52%,rgba(231,240,246,.55) 100%);
  }
  .cat-hero-inner{position:relative;z-index:2;padding:64px 24px 72px}
  .crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:24px;flex-wrap:wrap}
  .crumb a{color:var(--muted)}
  .crumb a:hover{color:var(--primary)}
  .crumb span.sep{color:#B7C6D1}
  .crumb .current{color:var(--ink);font-weight:600}
  .cat-hero h1{
    font-size:40px;line-height:1.2;font-weight:700;letter-spacing:-.02em;color:var(--ink);
    max-width:820px;
  }
  .cat-hero-sub{font-size:19px;font-weight:600;color:var(--primary-deep);margin-top:18px}
  .cat-hero-lines{max-width:720px;margin-top:16px;color:var(--muted);font-size:16px;line-height:1.95}
  .cat-hero-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin-top:32px}
  .cat-hero-meta{display:flex;gap:32px;flex-wrap:wrap;margin-top:36px;padding-top:20px;border-top:1px solid rgba(42,111,151,.16)}
  .cat-hero-meta div{font-size:14px;color:var(--muted)}
  .cat-hero-meta strong{display:block;font-size:22px;color:var(--accent);font-weight:700;letter-spacing:-.01em}

  /* ---------- 区块标题行 ---------- */
  .sec-head{max-width:780px;margin-bottom:44px}
  .sec-head .h2{margin-top:14px}
  .sec-head p{margin-top:14px}

  /* ---------- 时间线 ---------- */
  .timeline{margin-top:8px}
  .tl-item{position:relative;display:grid;grid-template-columns:64px 1fr;gap:24px;padding-bottom:32px}
  .tl-item:last-child{padding-bottom:0}
  .tl-item::before{
    content:"";position:absolute;left:31px;top:66px;bottom:0;width:2px;background:var(--line);
  }
  .tl-item:last-child::before{display:none}
  .tl-num{
    width:64px;height:64px;border-radius:50%;background:#fff;border:1px solid var(--line);
    display:flex;align-items:center;justify-content:center;
    font-size:17px;font-weight:700;color:var(--primary);box-shadow:var(--shadow-soft);
    position:relative;z-index:2;
  }
  .tl-item.is-first .tl-num{background:var(--primary);border-color:var(--primary);color:#fff}
  .tl-body{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
    padding:26px 28px;box-shadow:var(--shadow-soft);
    transition:border-color .25s ease,box-shadow .25s ease,transform .25s ease;
  }
  .tl-body:hover{border-color:#BBD5E4;box-shadow:var(--shadow-lift);transform:translateY(-2px)}
  .tl-body p{margin-top:12px;color:var(--muted);font-size:15.5px;line-height:1.9}
  .tl-points{margin-top:18px;display:grid;gap:10px}
  .tl-points li{position:relative;padding-left:18px;font-size:15px;color:var(--ink);line-height:1.8}
  .tl-points li::before{
    content:"";position:absolute;left:0;top:10px;width:6px;height:6px;background:var(--primary);border-radius:2px;
  }
  .tl-meta{
    margin-top:20px;padding-top:16px;border-top:1px dashed var(--line);
    display:flex;gap:24px;flex-wrap:wrap;font-size:13.5px;color:var(--muted);
  }
  .tl-meta b{color:var(--accent);font-weight:700}

  /* ---------- 防护点 ---------- */
  .guard-split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
  .figure-frame{position:relative}
  .figure-frame img{
    width:100%;border-radius:var(--radius-img);border:1px solid var(--line);object-fit:cover;
    aspect-ratio:16/10;
  }
  .figure-frame::after{
    content:"";position:absolute;inset:14px -14px -14px 14px;border:1px solid rgba(42,111,151,.35);
    border-radius:var(--radius-img);z-index:-1;
  }
  .figure-cap{margin-top:14px;font-size:13px;color:var(--muted);text-align:center}
  .fact-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:44px}
  .fact-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
    padding:26px;box-shadow:var(--shadow-soft);
    transition:border-color .25s ease,box-shadow .25s ease,transform .25s ease;
  }
  .fact-card:hover{border-color:#BBD5E4;box-shadow:var(--shadow-lift);transform:translateY(-2px)}
  .fact-index{
    display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:9px;
    background:var(--primary-light);color:var(--primary);font-size:14px;font-weight:700;letter-spacing:.02em;
  }
  .fact-card h3{margin-top:16px;font-size:17px;line-height:1.55;font-weight:600;color:var(--ink)}
  .fact-card p{margin-top:10px;font-size:15px;color:var(--muted);line-height:1.9}

  /* ---------- 材料与时限 ---------- */
  .spec-list{border-top:1px solid var(--line);margin-top:8px}
  .spec-row{
    display:grid;grid-template-columns:1.1fr 1.6fr .9fr;gap:20px;align-items:center;
    padding:20px 16px;border-bottom:1px solid var(--line);
    transition:background-color .2s ease;
  }
  .spec-row:hover{background:#F2F8FB}
  .spec-row .s-name{font-size:16px;font-weight:600;color:var(--ink)}
  .spec-row .s-use{font-size:15px;color:var(--muted);line-height:1.8}
  .spec-row .s-time{font-size:14px;color:var(--accent);font-weight:600}
  .spec-head{
    display:grid;grid-template-columns:1.1fr 1.6fr .9fr;gap:20px;padding:0 16px 12px;
    font-size:13px;letter-spacing:.06em;color:var(--muted);border-bottom:1px solid var(--line);
  }
  .spec-note{margin-top:20px;font-size:14px;color:var(--muted)}

  /* ---------- 横幅 CTA ---------- */
  .cta-banner{
    background:var(--primary-deep);border-radius:20px;padding:44px 48px;
    display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  }
  .cta-banner .cta-title{font-size:24px;line-height:1.4;font-weight:700;color:#fff}
  .cta-banner .cta-desc{margin-top:12px;font-size:15px;color:#BED4E0;max-width:620px;line-height:1.9}
  .cta-banner .cta-actions{display:flex;gap:14px;flex-wrap:wrap}

  /* ---------- 相关推荐 / 联系卡 ---------- */
  .rel-list{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-soft)}
  .rel-item{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 24px;border-bottom:1px solid var(--line);color:var(--ink);
  }
  .rel-item:last-child{border-bottom:none}
  .rel-item:hover{background:#F2F8FB;color:var(--primary-deep)}
  .rel-item .r-tag{
    font-size:12px;letter-spacing:.06em;color:var(--accent);background:#FBF1E7;border-radius:999px;
    padding:4px 12px;flex:none;font-weight:600;
  }
  .rel-item .r-title{font-size:16px;font-weight:600;flex:1}
  .rel-item .r-desc{font-size:14px;color:var(--muted);flex:1.4}
  .contact-card{
    margin-top:28px;background:var(--primary-light);border:1px solid #CFE2EE;border-radius:var(--radius-card);
    padding:32px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  }
  .contact-card h3{font-size:19px;font-weight:700;color:var(--primary-deep)}
  .contact-card p{margin-top:10px;font-size:15px;color:#37576B;line-height:1.9}
  .back-row{margin-top:28px;display:flex;gap:16px;flex-wrap:wrap}

  /* ---------- 页脚 ---------- */
  .footer{background:var(--primary-deep);color:#C9DBE6;margin-top:96px}
  .footer .container{padding-top:64px;padding-bottom:24px}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
  .footer h3{font-size:14px;font-weight:600;color:#fff;letter-spacing:.04em;margin:0 0 14px}
  .footer a{display:block;color:#C9DBE6;font-size:14px;padding:6px 0;line-height:1.6;text-decoration:none}
  .footer a:hover{color:#fff;text-decoration:underline}
  .footer p{font-size:14px;line-height:1.9;color:#C9DBE6;margin:0 0 6px}
  .footer p.mt-4{margin-top:16px}
  .footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:#fff}
  .footer-brand svg{color:#8FC0D8;flex: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:12px;flex-wrap:wrap;font-size:13px;color:#9FBECD;
  }

  /* ---------- 响应式 ---------- */
  @media (max-width:1024px){
    :root{--space-section:72px}
    .guard-split{gap:32px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  }
  @media (max-width:900px){
    .nav-side{display:none}
    .nav-toggle{display:inline-flex}
    .header-inner{height:64px}
    .brand{font-size:16px}
    .cat-hero-inner{padding:44px 24px 56px}
    .cat-hero h1{font-size:32px}
    .cat-hero-sub{font-size:17px}
    .h2{font-size:25px}
  }
  @media (max-width:768px){
    .guard-split{grid-template-columns:1fr}
    .figure-frame{order:-1}
    .fact-grid{grid-template-columns:1fr;gap:18px}
    .spec-head{display:none}
    .spec-row{grid-template-columns:1fr;gap:8px;padding:18px 4px}
    .cta-banner{padding:32px 24px}
    .rel-item{flex-wrap:wrap;gap:8px}
    .rel-item .r-desc{flex:1 1 100%}
    .contact-card{padding:26px 22px}
    .footer-grid{grid-template-columns:1fr}
  }
  @media (max-width:520px){
    :root{--space-section:56px}
    .container{padding:0 20px}
    .cat-hero h1{font-size:27px;line-height:1.28}
    .cat-hero-meta{gap:22px}
    .tl-item{grid-template-columns:46px 1fr;gap:16px}
    .tl-num{width:46px;height:46px;font-size:15px}
    .tl-item::before{left:22px;top:48px}
    .tl-body{padding:20px 18px}
    .btn{width:100%}
    .cat-hero-actions .link-arrow{width:auto}
    .cta-banner .cta-actions{width:100%}
    .cta-banner .cta-actions .btn{width:100%}
  }