/* roulang page: index */
:root{
  --bg:#F5F8FB;
  --brand:#256EB5;
  --brand-strong:#174E86;
  --brand-soft:#E6F0F9;
  --teal:#2A9D8F;
  --amber:#E9A23F;
  --ink:#1D2A36;
  --muted:#5C6D7A;
  --line:#DCE8F1;
  --line-soft:#E3ECF4;
  --card:#ffffff;
  --footer-bg:#142B3D;
  --radius-card:12px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-card:0 6px 18px rgba(35,75,110,.06);
  --shadow-card-hover:0 14px 30px rgba(35,75,110,.12);
  --maxw:1200px;
  --gap-s:16px;
  --gap-m:24px;
  --gap-l:40px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding-top:78px;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;background:#E8EEF3;border-radius:var(--radius-img);}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-strong);}
h1,h2,h3,h4{font-weight:700;line-height:1.3;color:var(--ink);margin:0;letter-spacing:.2px;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
section[id],div[id]{scroll-margin-top:96px;}

.grid-container{max-width:var(--maxw);margin:0 auto;padding-left:24px;padding-right:24px;width:100%;}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;height:78px;z-index:80;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(160%) blur(8px);
  -webkit-backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--line-soft);
}
.header-inner{height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px;}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink);}
.logo:hover{color:var(--ink);}
.logo-mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 38px;
  background:linear-gradient(150deg,var(--brand) 0%,var(--brand-strong) 100%);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;
  box-shadow:0 6px 14px rgba(37,110,181,.28);
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-name{font-size:17px;font-weight:700;letter-spacing:.4px;}
.logo-sub{font-size:11px;color:var(--muted);letter-spacing:.6px;}
.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;padding:9px 14px;font-size:15px;color:#3B4A57;border-radius:8px;
  transition:background .2s ease,color .2s ease;
}
.nav-link:hover{color:var(--brand);background:var(--brand-soft);}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);
  bottom:1px;width:18px;height:4px;border-radius:2px;background:var(--brand);
}

/* ---------- floating cta ---------- */
.float-cta{
  position:fixed;right:24px;bottom:28px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;
  height:42px;padding:0 20px;border-radius:21px;
  background:var(--brand);color:#fff;font-size:14px;font-weight:600;
  box-shadow:0 8px 24px rgba(37,110,181,.35);
  transition:transform .2s ease,background .2s ease,box-shadow .2s ease;
}
.float-cta:hover{background:var(--brand-strong);color:#fff;transform:translateY(-2px);box-shadow:0 12px 28px rgba(37,110,181,.42);}

/* ---------- mobile tabbar ---------- */
.mobile-tabbar{display:none;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:none;cursor:pointer;border-radius:var(--radius-btn);
  font-weight:600;transition:all .2s ease;text-align:center;
}
.btn-lg{height:48px;padding:0 26px;font-size:16px;}
.btn-md{height:40px;padding:0 20px;font-size:15px;}
.btn-sm{height:32px;padding:0 14px;font-size:13px;border-radius:8px;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(37,110,181,.26);}
.btn-primary:hover{background:var(--brand-strong);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(37,110,181,.34);}
.btn-line{background:#fff;color:var(--brand);border:1px solid var(--line);border-radius:8px;}
.btn-line:hover{border-color:var(--brand);color:var(--brand-strong);background:#fff;transform:translateY(-2px);}
.text-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--brand);}
.text-link:hover{color:var(--brand-strong);}
.text-link i{font-size:12px;transition:transform .2s ease;}
.text-link:hover i{transform:translateX(4px);}

/* ---------- sections ---------- */
.section{padding:100px 0;}
.section-tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;letter-spacing:2px;color:var(--brand);
  background:var(--brand-soft);border-radius:999px;padding:5px 14px;margin-bottom:16px;font-weight:600;
}
.section-title{font-size:clamp(26px,3vw,34px);margin-bottom:14px;}
.section-desc{color:var(--muted);font-size:15px;max-width:760px;}
.section-head{margin-bottom:48px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;border-radius:999px;
  font-size:12px;padding:5px 12px;font-weight:600;line-height:1.6;
}
.badge-blue{background:var(--brand-soft);color:var(--brand-strong);}
.badge-teal{background:rgba(42,157,143,.12);color:#1E7A6F;}
.badge-amber{background:rgba(233,162,63,.15);color:#A96B12;}
.divider{height:1px;background:var(--line-soft);border:0;margin:0;}

/* ---------- hero ---------- */
.hero{
  position:relative;min-height:88vh;display:flex;align-items:center;
  padding:72px 0 56px;overflow:hidden;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center right;background-repeat:no-repeat;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(245,248,251,.97) 0%,rgba(245,248,251,.92) 46%,rgba(245,248,251,.6) 100%);
}
.hero .grid-container{position:relative;z-index:2;}
.hero-copy{max-width:640px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  color:var(--brand-strong);background:#fff;border:1px solid var(--line);
  border-radius:999px;padding:6px 14px;margin-bottom:22px;box-shadow:var(--shadow-card);
}
.hero h1{
  font-size:clamp(34px,4.4vw,50px);font-weight:750;letter-spacing:.5px;
  margin-bottom:20px;line-height:1.28;
}
.hero h1 em{font-style:normal;color:var(--brand);}
.hero-lead{font-size:16px;color:var(--muted);margin-bottom:32px;max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:20px;}
.hero-visual{position:relative;padding-left:12px;}
.hero-card{
  position:relative;background:#fff;border:1px solid #E2EAF2;border-radius:16px;
  padding:14px;box-shadow:0 18px 40px rgba(35,75,110,.12);
}
.hero-card img{width:100%;height:auto;border-radius:10px;}
.hero-badge{position:absolute;z-index:3;display:inline-flex;align-items:center;gap:7px;
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 14px;
  font-size:12px;font-weight:600;color:var(--brand-strong);box-shadow:0 8px 20px rgba(35,75,110,.14);}
.hero-badge i{color:var(--teal);font-size:13px;}
.hero-badge-1{top:26px;left:-14px;}
.hero-badge-2{bottom:34px;right:-10px;}
.trust-strip{
  margin-top:56px;background:#fff;border:1px solid #E2EAF2;border-radius:14px;
  box-shadow:var(--shadow-card);display:grid;grid-template-columns:repeat(4,1fr);
}
.trust-item{display:flex;align-items:center;gap:10px;padding:20px 22px;font-size:13px;color:#3B4A57;}
.trust-item+.trust-item{border-left:1px solid var(--line-soft);}
.trust-item i{color:var(--brand);font-size:16px;}

/* ---------- features ---------- */
.section-features{background:#fff;}
.section-side{position:sticky;top:110px;}
.section-side h2{font-size:clamp(24px,2.6vw,32px);margin:0 0 16px;line-height:1.35;}
.section-side p{color:var(--muted);font-size:15px;margin-bottom:22px;}
.feature-list{border-top:1px solid var(--line-soft);}
.feature-item{
  display:grid;grid-template-columns:74px 1fr;gap:20px;
  padding:28px 0;border-bottom:1px solid var(--line-soft);
  transition:background .25s ease;
}
.feature-item:hover{background:#FAFCFE;}
.feature-num{
  font-size:24px;font-weight:700;color:#C3D8EA;letter-spacing:1px;
  font-variant-numeric:tabular-nums;padding-top:2px;
}
.feature-body h3{font-size:18px;margin-bottom:8px;display:flex;align-items:center;gap:10px;}
.feature-body h3 i{color:var(--brand);font-size:15px;}
.feature-body p{color:var(--muted);font-size:14.5px;max-width:620px;}

/* ---------- demo ---------- */
.section-demo{background:var(--bg);}
.demo-route{position:relative;margin-top:8px;}
.demo-route::before{
  content:"";position:absolute;left:31px;top:16px;bottom:16px;width:1px;
  background:repeating-linear-gradient(180deg,#C6DAEA 0 6px,transparent 6px 12px);
}
.demo-node{position:relative;display:grid;grid-template-columns:64px 1fr;gap:24px;padding:0 0 44px;}
.demo-node:last-child{padding-bottom:0;}
.node-index{
  width:64px;height:64px;border-radius:50%;background:#fff;border:1px solid #D6E4F0;
  display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:700;color:var(--brand);z-index:2;
  box-shadow:0 6px 16px rgba(35,75,110,.08);
}
.demo-node.is-key .node-index{background:var(--brand);color:#fff;border-color:var(--brand);box-shadow:0 10px 22px rgba(37,110,181,.3);}
.node-body{background:#fff;border:1px solid #E2EAF2;border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:26px 28px;transition:box-shadow .25s ease,transform .25s ease;}
.node-body:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-4px);}
.node-body h3{font-size:19px;margin-bottom:10px;}
.node-body p{color:var(--muted);font-size:15px;margin-bottom:16px;}
.node-figure{margin-top:14px;}
.node-figure img{width:100%;max-width:520px;border:1px solid #E8EEF3;}
.node-figure figcaption{font-size:12.5px;color:#8B9AA6;margin-top:8px;}
.node-points{display:flex;flex-wrap:wrap;gap:10px;}
.demo-cta{
  margin-top:56px;background:var(--brand-soft);border:1px solid #CFE2F2;border-radius:16px;
  padding:34px 36px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
}
.demo-cta h3{font-size:21px;margin-bottom:8px;}
.demo-cta p{color:#41576A;font-size:14.5px;max-width:620px;}

/* ---------- proof ---------- */
.section-proof{background:#fff;}
.proof-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;box-shadow:var(--shadow-card);}
.stat-card{padding:30px 26px;border-right:1px solid var(--line-soft);}
.stat-card:last-child{border-right:0;}
.stat-num{font-size:38px;font-weight:750;color:var(--brand);letter-spacing:.5px;line-height:1.2;font-variant-numeric:tabular-nums;}
.stat-num small{font-size:16px;font-weight:600;margin-left:2px;}
.stat-label{font-size:14px;color:var(--ink);font-weight:600;margin-top:10px;}
.stat-note{font-size:12.5px;color:#8B9AA6;margin-top:4px;}
.quote-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:32px;}
.quote-card{
  position:relative;border-radius:14px;overflow:hidden;min-height:260px;
  display:flex;flex-direction:column;justify-content:flex-end;padding:32px;
  background-size:cover;background-position:center;border:1px solid #E2EAF2;
}
.quote-card::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,43,61,.25) 0%,rgba(20,43,61,.86) 100%);}
.quote-inner{position:relative;z-index:2;color:#fff;}
.quote-inner i{font-size:22px;color:#8FC7EE;margin-bottom:12px;display:block;}
.quote-text{font-size:16px;line-height:1.75;margin-bottom:14px;}
.quote-from{font-size:13px;color:#BFD4E4;}

/* ---------- news ---------- */
.section-news{background:var(--bg);}
.section-news .section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;}
.news-list{display:flex;flex-direction:column;gap:16px;}
.news-item{
  display:grid;grid-template-columns:132px 1fr 52px;align-items:center;gap:24px;
  background:#fff;border:1px solid #E2EAF2;border-radius:var(--radius-card);
  padding:22px 26px;min-height:120px;box-shadow:var(--shadow-card);
  transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.news-item:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-4px);border-color:#CFE2F2;color:inherit;}
.news-date{
  background:var(--brand-soft);border-radius:10px;padding:14px 10px;text-align:center;
  font-size:13px;color:var(--brand-strong);font-weight:600;line-height:1.4;
}
.news-main{min-width:0;}
.news-meta{display:flex;align-items:center;gap:12px;margin-bottom:6px;flex-wrap:wrap;}
.news-cat{font-size:12px;font-weight:600;color:#1E7A6F;background:rgba(42,157,143,.12);border-radius:999px;padding:3px 10px;}
.news-time{font-size:12.5px;color:#8B9AA6;}
.news-title{font-size:17px;margin-bottom:6px;color:var(--ink);overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;}
.news-summary{font-size:14px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;}
.news-arrow{width:40px;height:40px;border-radius:50%;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--brand);}
.news-item:hover .news-arrow{background:var(--brand);border-color:var(--brand);color:#fff;}
.news-empty{
  border:1px dashed #C6DAEA;border-radius:14px;background:#fff;
  padding:56px 24px;text-align:center;color:var(--muted);font-size:14.5px;
}
.news-empty i{display:block;font-size:24px;color:#A9C3D8;margin-bottom:12px;}

/* ---------- pricing ---------- */
.section-pricing{background:#fff;}
.pricing-grid{display:grid;grid-template-columns:1fr 1.16fr 1fr;gap:24px;align-items:center;}
.plan{
  background:#fff;border:1px solid #E2EAF2;border-radius:14px;padding:32px 28px;
  box-shadow:var(--shadow-card);transition:box-shadow .25s ease,transform .25s ease;
}
.plan:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-4px);}
.plan-name{font-size:17px;font-weight:700;margin-bottom:8px;}
.plan-price{font-size:30px;font-weight:750;color:var(--ink);letter-spacing:.4px;margin-bottom:6px;font-variant-numeric:tabular-nums;}
.plan-price span{font-size:13px;font-weight:500;color:var(--muted);margin-left:4px;}
.plan-sub{font-size:13px;color:#8B9AA6;margin-bottom:22px;}
.plan-list{display:flex;flex-direction:column;gap:12px;margin-bottom:26px;}
.plan-list li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:#3B4A57;}
.plan-list i{color:var(--teal);font-size:12px;margin-top:6px;}
.plan.is-featured{
  position:relative;padding:44px 34px;border:1px solid #CFE2F2;
  box-shadow:0 18px 40px rgba(35,75,110,.14);transform:translateY(-6px);z-index:2;
}
.plan.is-featured::before{content:"";position:absolute;top:0;left:0;right:0;height:5px;border-radius:14px 14px 0 0;background:var(--brand);}
.plan.is-featured:hover{transform:translateY(-10px);}
.plan.is-featured .plan-name{font-size:19px;}
.plan.is-featured .plan-price{font-size:36px;color:var(--brand-strong);}
.plan-flag{position:absolute;top:-13px;right:24px;background:var(--amber);color:#4A2E05;font-size:12px;font-weight:700;border-radius:999px;padding:4px 12px;}
.pricing-note{font-size:12px;color:#8B9AA6;margin-top:26px;text-align:center;}

/* ---------- faq ---------- */
.section-faq{background:var(--bg);}
.faq-top{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;}
.faq-list{display:flex;flex-direction:column;gap:14px;margin-top:36px;}
.faq-item{background:#fff;border:1px solid #E2EAF2;border-radius:12px;box-shadow:var(--shadow-card);overflow:hidden;}
.faq-item summary{
  list-style:none;cursor:pointer;padding:22px 28px;font-size:16px;font-weight:600;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:18px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary i{color:var(--brand);font-size:13px;transition:transform .25s ease;flex:0 0 auto;}
.faq-item[open] summary i{transform:rotate(180deg);}
.faq-item[open] summary{color:var(--brand-strong);}
.faq-answer{padding:0 68px 26px 68px;color:var(--muted);font-size:14.5px;line-height:1.85;}

/* ---------- cta band ---------- */
.cta-band{background:var(--brand-soft);border-top:1px solid #D3E5F4;border-bottom:1px solid #D3E5F4;padding:64px 0;}
.cta-band-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:10px;}
.cta-band p{color:#41576A;font-size:14.5px;max-width:640px;}

/* ---------- footer ---------- */
.site-footer{background:var(--footer-bg);color:#B9CBD9;padding:72px 0 0;font-size:14px;}
.footer-top{padding-bottom:48px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px;}
.footer-brand .logo-mark{box-shadow:none;background:#256EB5;}
.footer-brand-name{font-size:17px;font-weight:700;color:#fff;}
.footer-brand-sub{font-size:11px;color:#7F97A8;letter-spacing:.6px;}
.footer-desc{font-size:13.5px;color:#93A9B9;max-width:320px;line-height:1.85;}
.footer-title{font-size:14px;font-weight:700;color:#fff;margin-bottom:18px;letter-spacing:.6px;}
.footer-links{display:flex;flex-direction:column;gap:12px;}
.footer-links a{color:#B9CBD9;font-size:13.5px;}
.footer-links a:hover{color:#fff;}
.footer-contact li{font-size:13.5px;color:#B9CBD9;margin-bottom:12px;display:flex;gap:10px;align-items:flex-start;}
.footer-contact i{color:#5EA0D6;margin-top:5px;font-size:13px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.09);padding:24px 0 34px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
}
.footer-legal{font-size:12.5px;color:#7F97A8;}
.footer-bottom-links{display:flex;flex-wrap:wrap;gap:20px;}
.footer-bottom-links a{font-size:12.5px;color:#93A9B9;}
.footer-bottom-links a:hover{color:#fff;}

/* ---------- responsive ---------- */
@media screen and (max-width:1024px){
  .section{padding:72px 0;}
  .hero{min-height:auto;padding:56px 0 44px;}
  .hero-visual{padding-left:0;margin-top:40px;}
  .trust-strip{grid-template-columns:repeat(2,1fr);}
  .trust-item:nth-child(3){border-left:0;}
  .trust-item:nth-child(n+3){border-top:1px solid var(--line-soft);}
  .proof-grid{grid-template-columns:repeat(2,1fr);}
  .stat-card:nth-child(2){border-right:0;}
  .stat-card:nth-child(3),.stat-card:nth-child(4){border-top:1px solid var(--line-soft);}
  .pricing-grid{grid-template-columns:1fr;gap:20px;}
  .plan.is-featured{transform:none;}
  .plan.is-featured:hover{transform:translateY(-4px);}
}
@media screen and (max-width:899px){
  .main-nav{display:none;}
  body{padding-bottom:calc(58px + env(safe-area-inset-bottom) + 24px);}
  .mobile-tabbar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:90;
    height:calc(58px + env(safe-area-inset-bottom));
    padding-bottom:env(safe-area-inset-bottom);
    background:rgba(255,255,255,.96);border-top:1px solid var(--line-soft);
    backdrop-filter:saturate(160%) blur(8px);
  }
  .tab-item{
    flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    font-size:11px;color:#8395A3;font-weight:500;
  }
  .tab-item i{font-size:17px;}
  .tab-item.is-active{color:var(--brand);font-weight:600;}
  .tab-item:hover{color:var(--brand);}
  .float-cta{right:16px;bottom:calc(74px + env(safe-area-inset-bottom));}
}
@media screen and (max-width:768px){
  .grid-container{padding-left:16px;padding-right:16px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:32px;}
  .header-inner{height:66px;}
  .site-header{height:66px;}
  body{padding-top:66px;}
  .hero h1{font-size:clamp(28px,7.4vw,36px);}
  .logo-sub{display:none;}
  .feature-item{grid-template-columns:52px 1fr;gap:14px;padding:22px 0;}
  .feature-num{font-size:19px;}
  .demo-node{grid-template-columns:46px 1fr;gap:14px;}
  .node-index{width:46px;height:46px;font-size:15px;}
  .demo-route::before{left:22px;}
  .node-body{padding:22px 20px;}
  .quote-grid{grid-template-columns:1fr;}
  .news-item{grid-template-columns:1fr;gap:14px;padding:20px;min-height:auto;}
  .news-date{display:inline-block;width:auto;padding:6px 14px;text-align:left;}
  .news-arrow{display:none;}
  .faq-answer{padding:0 24px 22px 24px;}
  .faq-item summary{padding:18px 20px;font-size:15px;}
  .hero-actions{gap:14px;}
  .trust-strip{grid-template-columns:1fr;}
  .trust-item+.trust-item{border-left:0;border-top:1px solid var(--line-soft);}
  .footer-top{padding-bottom:32px;}
  .cta-band{padding:48px 0;}
  .footer-bottom-links{gap:14px;}
}
@media screen and (max-width:520px){
  .proof-grid{grid-template-columns:1fr;}
  .stat-card{border-right:0;border-top:1px solid var(--line-soft);padding:24px 22px;}
  .stat-card:first-child{border-top:0;}
  .hero h1{font-size:28px;}
  .plan{padding:26px 22px;}
  .plan.is-featured{padding:32px 24px;}
  .demo-cta{padding:26px 22px;}
}

/* roulang page: article */
:root{
  --bg:#F5F8FB;
  --primary:#256EB5;
  --primary-dark:#174E86;
  --primary-soft:#E6F0F9;
  --teal:#2A9D8F;
  --amber:#E9A23F;
  --ink:#1D2A36;
  --muted:#5C6D7A;
  --line:#DCE8F1;
  --line-soft:#E3ECF4;
  --card-border:#E2EAF2;
  --white:#FFFFFF;
  --shadow-sm:0 6px 18px rgba(35,75,110,.06);
  --shadow-md:0 10px 26px rgba(35,75,110,.09);
  --shadow-lg:0 14px 30px rgba(35,75,110,.12);
  --radius-card:12px;
  --radius-img:12px;
  --radius-pill:999px;
  --gap-s:16px;
  --gap-m:24px;
  --gap-l:40px;
  --header-h:78px;
}
*,*::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","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  padding-bottom:96px;
}
h1,h2,h3,h4,h5,h6{
  margin:0;
  color:var(--ink);
  font-weight:650;
  line-height:1.3;
  letter-spacing:.005em;
}
p{margin:0 0 16px;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--primary-dark);}
img{max-width:100%;height:auto;display:block;background:#E8EEF3;}
button{font-family:inherit;}
ul,ol{padding-left:20px;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
.grid-container{max-width:1220px;padding-left:24px;padding-right:24px;}
@media screen and (max-width:640px){
  .grid-container{padding-left:16px;padding-right:16px;}
}
section{scroll-margin-top:96px;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:10px;border:1px solid transparent;cursor:pointer;
  font-size:15px;font-weight:600;line-height:1;
  transition:transform .2s ease,background-color .2s ease,box-shadow .2s ease,color .2s ease,border-color .2s ease;
  text-align:center;
}
.btn-lg{height:48px;padding:0 26px;}
.btn-md{height:40px;padding:0 20px;font-size:14px;}
.btn-sm{height:32px;padding:0 14px;font-size:13px;border-radius:8px;}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(37,110,181,.24);}
.btn-primary:hover,.btn-primary:focus{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(37,110,181,.32);}
.btn-ghost{background:#fff;color:var(--primary);border-color:#CBDDEB;}
.btn-ghost:hover,.btn-ghost:focus{background:var(--primary-soft);color:var(--primary-dark);border-color:var(--primary);transform:translateY(-2px);}
.btn-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--primary);}
.btn-link:hover{color:var(--primary-dark);gap:10px;}

/* ---------- Tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:var(--radius-pill);
  background:var(--primary-soft);color:var(--primary-dark);
  font-size:12px;line-height:1;font-weight:600;
}
.tag-teal{background:rgba(42,157,143,.12);color:#1F7A6F;}
.tag-amber{background:rgba(233,162,63,.16);color:#9A6512;}
.tag-plain{background:#F0F4F8;color:var(--muted);}

/* ---------- Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  height:var(--header-h);
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{height:var(--header-h);display:flex;align-items:center;justify-content:space-between;}
.logo{display:flex;align-items:center;gap:10px;}
.logo-mark{
  width:38px;height:38px;border-radius:10px;flex:0 0 auto;
  background:linear-gradient(160deg,#256EB5,#174E86);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;
  box-shadow:0 6px 14px rgba(37,110,181,.28);
}
.logo-text{display:flex;flex-direction:column;line-height:1.25;}
.logo-name{font-size:19px;font-weight:700;color:var(--ink);letter-spacing:.02em;}
.logo-sub{font-size:11px;color:var(--muted);letter-spacing:.06em;}
.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;padding:8px 14px;border-radius:8px;
  font-size:15px;color:#3C4C59;font-weight:500;
}
.nav-link:hover{color:var(--primary);background:#F2F7FC;}
.nav-link.is-active{color:var(--primary);font-weight:650;}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:3px;border-radius:2px;background:var(--primary);
}
@media screen and (max-width:899px){
  .main-nav{display:none;}
}

/* ---------- Page head ---------- */
.page-head{
  margin-top:var(--header-h);
  background-image:linear-gradient(105deg,rgba(255,255,255,.94) 0%,rgba(230,240,249,.9) 55%,rgba(255,255,255,.7) 100%),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
  padding:34px 0 30px;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;color:var(--muted);}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:#B7C6D2;}
.breadcrumb .current{color:#3C4C59;}
.article-title{
  font-size:clamp(24px,3.4vw,34px);
  margin:16px 0 14px;
  max-width:22em;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:13px;color:var(--muted);}
.article-meta i{color:#9FB2C1;margin-right:5px;}

/* ---------- Layout ---------- */
.article-wrap{padding:44px 0 72px;}
.main-col{min-width:0;}
.side-col{min-width:0;}
@media screen and (min-width:900px){
  .side-col{padding-left:8px;}
}

/* ---------- Article card ---------- */
.panel{
  background:#fff;border:1px solid var(--card-border);border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
}
.article-panel{padding:34px 36px 38px;}
@media screen and (max-width:640px){
  .article-panel{padding:24px 18px 26px;}
}
.article-cover{
  border-radius:var(--radius-img);overflow:hidden;margin-bottom:28px;
  border:1px solid var(--card-border);
}
.article-cover img{width:100%;height:auto;object-fit:cover;}

/* ---------- Article body ---------- */
.article-body{max-width:74ch;font-size:16px;line-height:1.85;color:#26333E;}
.article-body > p:first-of-type{font-size:16.5px;color:#31404C;}
.article-body h2{font-size:clamp(20px,2.4vw,25px);margin:48px 0 16px;padding-left:0;position:relative;}
.article-body h2::before{
  content:"";display:block;width:36px;height:3px;border-radius:2px;background:var(--primary);margin-bottom:12px;
}
.article-body h3{font-size:clamp(17px,2vw,20px);margin:40px 0 12px;color:#22303C;}
.article-body h4{font-size:16px;margin:28px 0 10px;color:#22303C;}
.article-body p{margin:0 0 18px;}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px;}
.article-body li{margin-bottom:8px;}
.article-body ul li::marker{color:var(--primary);}
.article-body blockquote{
  margin:26px 0;padding:6px 0 6px 20px;border-left:4px solid var(--primary);
  background:#F7FAFD;color:#3C4C59;font-size:15.5px;line-height:1.8;font-style:normal;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--radius-img);margin:22px 0;border:1px solid var(--card-border);}
.article-body figure{margin:26px 0;}
.article-body figcaption{font-size:12.5px;color:var(--muted);text-align:center;margin-top:8px;}
.article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--primary-dark);}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14.5px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;vertical-align:top;}
.article-body th{background:#F3F8FC;font-weight:650;color:#22303C;}
.article-body hr{border:0;border-top:1px solid var(--line-soft);margin:36px 0;}
.article-body code{background:#F1F5F9;border-radius:5px;padding:2px 6px;font-size:14px;color:#174E86;}

/* ---------- Article footer ---------- */
.article-foot{margin-top:40px;padding-top:24px;border-top:1px solid var(--line-soft);}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.tag-row .label{font-size:13px;color:var(--muted);margin-right:4px;}

/* ---------- Empty state ---------- */
.empty-state{
  border:2px dashed #C7DAE8;border-radius:var(--radius-card);
  padding:44px 24px;text-align:center;background:#FBFDFF;
}
.empty-state i{font-size:26px;color:#9FB2C1;}
.empty-state h2{font-size:19px;margin:14px 0 8px;}
.empty-state p{color:var(--muted);font-size:14px;margin-bottom:18px;}

/* ---------- Sidebar ---------- */
.side-block{margin-bottom:24px;padding:22px 22px 18px;}
.side-title{
  display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;color:#22303C;margin-bottom:14px;
}
.side-title i{color:var(--primary);font-size:14px;}
.side-list{list-style:none;margin:0;padding:0;}
.side-item{
  display:flex;gap:12px;padding:13px 0;border-bottom:1px solid var(--line-soft);
}
.side-item:last-child{border-bottom:0;padding-bottom:0;}
.side-item .num{
  flex:0 0 auto;width:26px;height:26px;border-radius:8px;background:var(--primary-soft);color:var(--primary-dark);
  font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;margin-top:2px;
}
.side-item .side-body{min-width:0;}
.side-item .side-link{
  display:block;font-size:15px;font-weight:600;color:#22303C;line-height:1.5;
  overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
}
.side-item .side-link:hover{color:var(--primary);}
.side-item .side-meta{font-size:12px;color:var(--muted);margin-top:4px;}
.side-note{
  font-size:13px;color:var(--muted);background:#F7FAFD;border:1px solid var(--line-soft);
  border-radius:10px;padding:12px 14px;line-height:1.7;
}
.guide-list{list-style:none;margin:0;padding:0;}
.guide-list li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:#3C4C59;margin-bottom:12px;line-height:1.7;}
.guide-list li i{color:var(--teal);margin-top:5px;font-size:13px;}
@media screen and (max-width:899px){
  .side-block{margin-top:24px;}
}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--primary-soft);
  border-top:1px solid #CFE2F2;border-bottom:1px solid #CFE2F2;
  padding:48px 0;
}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;}
.cta-inner h2{font-size:clamp(20px,2.6vw,26px);margin-bottom:8px;}
.cta-inner p{color:#40566A;margin:0;font-size:15px;max-width:56ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- Footer ---------- */
.site-footer{background:#142B3D;color:#C6D4DF;padding:64px 0 26px;margin-top:0;}
.footer-top{padding-bottom:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand-name{font-size:18px;font-weight:700;color:#fff;}
.footer-brand-sub{font-size:11px;color:#8FA9BC;letter-spacing:.06em;}
.footer-desc{font-size:14px;color:#9FB3C3;line-height:1.8;max-width:38ch;}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:14px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{color:#AEC1D0;font-size:14px;}
.footer-links a:hover{color:#fff;}
.footer-contact{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px;}
.footer-contact li{font-size:14px;color:#AEC1D0;display:flex;gap:10px;line-height:1.7;}
.footer-contact i{color:#5C87AC;margin-top:5px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding-top:20px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
}
.footer-legal{font-size:13px;color:#8FA9BC;}
.footer-bottom-links{display:flex;flex-wrap:wrap;gap:18px;}
.footer-bottom-links a{font-size:13px;color:#AEC1D0;}
.footer-bottom-links a:hover{color:#fff;}

/* ---------- Mobile tab bar ---------- */
.tab-bar-mobile{
  position:fixed;left:0;right:0;bottom:0;z-index:60;
  height:calc(58px + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);
  background:rgba(255,255,255,.97);
  border-top:1px solid var(--line);
  display:flex;align-items:stretch;
  box-shadow:0 -6px 20px rgba(35,75,110,.08);
}
.tab-item{
  flex:1 1 0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:11px;color:#8395A3;padding-top:6px;
}
.tab-item i{font-size:17px;}
.tab-item.is-active{color:var(--primary);font-weight:650;}
@media screen and (min-width:900px){
  .tab-bar-mobile{display:none;}
  body{padding-bottom:0;}
}

/* ---------- Floating CTA ---------- */
.float-cta{
  position:fixed;z-index:70;right:24px;bottom:26px;
  height:42px;padding:0 20px;border-radius:21px;
  background:var(--primary);color:#fff;font-size:14px;font-weight:600;
  display:inline-flex;align-items:center;gap:8px;
  box-shadow:0 8px 24px rgba(37,110,181,.35);
  transition:transform .2s ease,background-color .2s ease,box-shadow .2s ease;
}
.float-cta:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 28px rgba(37,110,181,.42);}
@media screen and (max-width:899px){
  .float-cta{right:16px;bottom:calc(58px + env(safe-area-inset-bottom) + 16px);}
}

/* roulang page: category1 */
:root{
  --bg:#F5F8FB;
  --bg-soft:#E6F0F9;
  --bg-faint:#EFF6FC;
  --brand:#256EB5;
  --brand-dark:#174E86;
  --accent:#2A9D8F;
  --warm:#E9A23F;
  --ink:#1D2A36;
  --ink-2:#5C6D7A;
  --line:#DCE8F1;
  --line-soft:#E3ECF4;
  --white:#ffffff;
  --footer:#142B3D;
  --radius:12px;
  --radius-sm:10px;
  --radius-pill:999px;
  --shadow-1:0 6px 18px rgba(35,75,110,.06);
  --shadow-2:0 14px 30px rgba(35,75,110,.12);
  --max:1200px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
h1,h2,h3,h4,h5,h6{font-family:var(--font);line-height:1.3;font-weight:700;letter-spacing:-0.01em;color:var(--ink);margin:0;}
p{margin:0 0 16px;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-dark);}
img{max-width:100%;display:block;background:#E8EEF3;border-radius:var(--radius-sm);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:var(--font);}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

.grid-container{max-width:var(--max);padding-left:24px;padding-right:24px;margin-left:auto;margin-right:auto;}
@media screen and (max-width:640px){
  .grid-container{padding-left:16px;padding-right:16px;}
}

/* ---------- Header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  height:78px;
  z-index:100;
  background:rgba(255,255,255,.86);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  height:78px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.logo{display:inline-flex;align-items:center;gap:12px;text-decoration:none;}
.logo-mark{
  width:40px;height:40px;flex:0 0 40px;
  border-radius:12px;
  background:linear-gradient(140deg,#256EB5,#174E86);
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:17px;
  box-shadow:0 6px 16px rgba(37,110,181,.28);
}
.logo-text{display:flex;flex-direction:column;line-height:1.25;}
.logo-name{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:.01em;}
.logo-sub{font-size:11px;color:var(--ink-2);letter-spacing:.06em;}
.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:10px 14px 12px;
  font-size:15px;
  color:var(--ink-2);
  font-weight:500;
  border-radius:8px;
  transition:color .2s ease,background .2s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;bottom:4px;
  transform:translateX(-50%);
  width:0;height:4px;
  border-radius:2px;
  background:var(--brand);
  transition:width .24s ease;
}
.nav-link:hover{color:var(--brand);background:var(--bg-faint);}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{width:22px;}

/* ---------- Floating CTA ---------- */
.float-cta{
  position:fixed;
  right:28px;bottom:30px;
  z-index:110;
  display:inline-flex;align-items:center;gap:8px;
  height:42px;
  padding:0 20px;
  border-radius:21px;
  background:var(--brand);
  color:#fff;
  font-size:14px;
  font-weight:600;
  box-shadow:0 8px 24px rgba(37,110,181,.35);
  transition:background .22s ease,transform .22s ease,box-shadow .22s ease;
}
.float-cta:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 30px rgba(37,110,181,.42);}

/* ---------- Mobile Tabbar ---------- */
.mobile-tabbar{display:none;}

/* ---------- Main offset ---------- */
.page-main{padding-top:78px;}

/* ---------- Breadcrumb ---------- */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12px;color:var(--ink-2);
  margin-bottom:22px;
}
.crumbs a{color:var(--ink-2);}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{color:#B6C6D3;}
.crumbs .cur{color:var(--brand);font-weight:600;}

/* ---------- Category Hero ---------- */
.cat-hero{
  position:relative;
  padding:140px 0 68px;
  overflow:hidden;
  background:var(--bg-faint);
  scroll-margin-top:96px;
}
.cat-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  opacity:.45;
}
.cat-hero::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(102deg,rgba(255,255,255,.97) 0%,rgba(255,255,255,.9) 42%,rgba(245,248,251,.72) 100%);
}
.cat-hero-inner{position:relative;z-index:2;max-width:840px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.18em;
  color:var(--brand);text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);}
.cat-hero h1{
  font-size:clamp(30px,4vw,50px);
  font-weight:750;
  line-height:1.22;
  letter-spacing:-0.02em;
  margin:0 0 18px;
}
.cat-hero-lead{
  font-size:17px;
  color:var(--ink-2);
  line-height:1.85;
  max-width:660px;
  margin:0 0 30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-bottom:42px;}
.hero-trust{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:16px;
  padding-top:26px;
  border-top:1px solid var(--line);
}
.trust-item{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-2);}
.trust-item i{color:var(--brand);font-size:15px;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:600;
  border-radius:10px;
  border:1px solid transparent;
  cursor:pointer;
  text-decoration:none;
  transition:background .22s ease,color .22s ease,transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  white-space:nowrap;
}
.btn-lg{height:48px;padding:0 26px;font-size:16px;}
.btn-md{height:40px;padding:0 20px;font-size:15px;}
.btn-sm{height:32px;padding:0 14px;font-size:13px;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(37,110,181,.24);}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 14px 28px rgba(37,110,181,.32);}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark);transform:translateY(-2px);box-shadow:var(--shadow-1);}
.btn-text{
  background:transparent;color:var(--brand);
  display:inline-flex;align-items:center;gap:8px;
  font-weight:600;font-size:15px;
  text-decoration:none;
}
.btn-text:hover{color:var(--brand-dark);gap:12px;}

/* ---------- Sections ---------- */
.section{padding:100px 0;scroll-margin-top:96px;}
.section-alt{background:var(--white);}
.section-head{max-width:720px;margin-bottom:44px;}
.section-title{font-size:clamp(26px,3vw,34px);font-weight:700;margin:14px 0 14px;}
.section-sub{color:var(--ink-2);font-size:16px;line-height:1.85;margin:0;}

/* ---------- Entry list ---------- */
.entry-table{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-1);
  overflow:hidden;
}
.entry-row{
  display:grid;
  grid-template-columns:56px 1fr 210px;
  gap:22px;
  align-items:center;
  padding:24px 26px;
  border-bottom:1px solid var(--line-soft);
  transition:background .2s ease;
}
.entry-row:last-child{border-bottom:0;}
.entry-row:hover{background:#F8FBFE;}
.entry-ico{
  width:44px;height:44px;
  border-radius:12px;
  background:var(--bg-soft);
  color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-size:17px;
}
.entry-name{font-size:17px;font-weight:650;margin:0 0 5px;}
.entry-desc{font-size:14px;color:var(--ink-2);line-height:1.72;margin:0;}
.entry-act{display:flex;flex-direction:column;align-items:flex-end;gap:9px;}
.entry-tag{
  font-size:12px;line-height:1.6;
  padding:1px 10px;
  border-radius:var(--radius-pill);
  background:var(--bg-soft);
  color:var(--brand-dark);
}
.entry-tag.tag-accent{background:rgba(42,157,143,.12);color:#1F7A6F;}
.entry-tag.tag-warm{background:rgba(233,162,63,.14);color:#9A6A16;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand);
  transition:gap .2s ease,color .2s ease;
}
.link-arrow:hover{gap:11px;color:var(--brand-dark);}
.entry-note{
  margin-top:20px;
  font-size:13px;
  color:var(--ink-2);
  display:flex;gap:10px;align-items:flex-start;
}
.entry-note i{color:var(--accent);margin-top:5px;}

/* ---------- Checklist ---------- */
.check-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 48px;}
.check-item{
  display:flex;gap:18px;
  padding:26px 0;
  border-top:1px solid var(--line);
}
.check-no{
  font-size:13px;font-weight:700;color:var(--brand);
  letter-spacing:.06em;
  padding-top:3px;
  min-width:34px;
}
.check-body h3{font-size:17px;font-weight:650;margin:0 0 8px;}
.check-body p{font-size:14.5px;color:var(--ink-2);line-height:1.78;margin:0;}

/* ---------- Flow ---------- */
.flow{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:52px;}
.flow::before{
  content:"";
  position:absolute;top:26px;left:16.6%;right:16.6%;
  border-top:1px dashed #C6D9E8;
}
.flow-item{text-align:center;position:relative;z-index:2;padding:0 8px;}
.flow-no{
  width:52px;height:52px;
  margin:0 auto 18px;
  border-radius:50%;
  background:#fff;
  border:1px solid var(--line);
  color:var(--brand);
  font-weight:700;
  font-size:16px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-1);
}
.flow-item h3{font-size:18px;font-weight:650;margin:0 0 10px;}
.flow-item p{font-size:14.5px;color:var(--ink-2);line-height:1.78;margin:0;}

/* ---------- Media block ---------- */
.media-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:14px;
  box-shadow:var(--shadow-1);
  transition:box-shadow .25s ease,transform .25s ease;
}
.media-card:hover{box-shadow:var(--shadow-2);transform:translateY(-4px);}
.media-card img{border-radius:var(--radius-sm);width:100%;height:auto;}
.media-caption{font-size:13px;color:var(--ink-2);padding:12px 6px 2px;}

.point-list{margin-top:22px;}
.point-list li{
  display:flex;gap:12px;
  padding:14px 0;
  border-bottom:1px solid var(--line-soft);
  font-size:15px;
  color:var(--ink-2);
  line-height:1.75;
}
.point-list li:last-child{border-bottom:0;}
.point-list i{color:var(--brand);margin-top:6px;font-size:13px;}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:24px 4px;
  font-size:16.5px;
  font-weight:600;
  color:var(--ink);
  display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand);}
.faq-item summary .chev{
  flex:0 0 auto;
  color:var(--brand);
  font-size:14px;
  margin-top:6px;
  transition:transform .25s ease;
}
.faq-item[open] summary .chev{transform:rotate(180deg);}
.faq-answer{padding:0 40px 26px 4px;max-width:78ch;}
.faq-answer p{font-size:15px;color:var(--ink-2);line-height:1.85;margin:0;}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--bg-soft);
  border-radius:16px;
  padding:56px 48px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  scroll-margin-top:96px;
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);margin:0 0 10px;}
.cta-band p{margin:0;color:var(--ink-2);font-size:15px;max-width:620px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--footer);
  color:#B9CBDA;
  padding:72px 0 28px;
  margin-top:0;
}
.footer-top{padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.1);}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .logo-mark{box-shadow:none;background:rgba(255,255,255,.1);}
.footer-brand-name{font-size:16px;font-weight:700;color:#fff;letter-spacing:.01em;}
.footer-brand-sub{font-size:11px;color:#8FA9BD;letter-spacing:.06em;}
.footer-desc{font-size:13.5px;line-height:1.8;color:#93AABE;max-width:330px;margin:0;}
.footer-title{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.02em;}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{font-size:13.5px;color:#A9BFD1;transition:color .2s ease,padding-left .2s ease;}
.footer-links a:hover{color:#fff;padding-left:4px;}
.footer-contact li{
  display:flex;gap:10px;
  font-size:13.5px;
  color:#93AABE;
  line-height:1.7;
  margin-bottom:11px;
}
.footer-contact i{color:#5E86A8;margin-top:5px;font-size:13px;}
.footer-bottom{
  padding-top:24px;
  display:flex;flex-wrap:wrap;
  align-items:center;justify-content:space-between;
  gap:14px;
}
.footer-legal{font-size:12.5px;color:#7E97AC;}
.footer-bottom-links{display:flex;flex-wrap:wrap;gap:20px;}
.footer-bottom-links a{font-size:12.5px;color:#8FA9BD;}
.footer-bottom-links a:hover{color:#fff;}

/* ---------- Responsive ---------- */
@media screen and (max-width:1024px){
  .section{padding:72px 0;}
  .cat-hero{padding:126px 0 58px;}
  .check-grid{gap:0 32px;}
}
@media screen and (max-width:899px){
  .main-nav{display:none;}
  .mobile-tabbar{
    display:flex;
    position:fixed;
    left:0;right:0;bottom:0;
    z-index:120;
    height:calc(58px + env(safe-area-inset-bottom,0px));
    padding-bottom:env(safe-area-inset-bottom,0px);
    background:rgba(255,255,255,.96);
    -webkit-backdrop-filter:blur(10px);
    backdrop-filter:blur(10px);
    border-top:1px solid var(--line);
  }
  .tab-item{
    flex:1 1 0;
    display:flex;flex-direction:column;
    align-items:center;justify-content:center;
    gap:3px;
    color:#8395A3;
    font-size:10.5px;
    line-height:1.2;
    padding-top:6px;
  }
  .tab-item i{font-size:16px;}
  .tab-item.is-active{color:var(--brand);font-weight:600;}
  .float-cta{
    bottom:calc(58px + env(safe-area-inset-bottom,0px) + 16px);
    right:16px;
    height:42px;
    padding:0 16px;
    font-size:13px;
  }
  body{padding-bottom:96px;}
  .hero-trust{grid-template-columns:repeat(2,1fr);gap:14px;}
  .flow{grid-template-columns:1fr;gap:0;}
  .flow::before{display:none;}
  .flow-item{text-align:left;display:flex;gap:18px;padding:0 0 28px;border-left:1px dashed #C6D9E8;margin-left:26px;padding-left:26px;}
  .flow-no{margin:0;flex:0 0 52px;}
  .flow-item:last-child{border-left-color:transparent;}
  .cta-band{padding:40px 26px;}
}
@media screen and (max-width:767px){
  .entry-row{grid-template-columns:44px 1fr;gap:14px 16px;padding:20px 18px;}
  .entry-act{
    grid-column:2;
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    width:100%;
  }
  .check-grid{grid-template-columns:1fr;}
  .faq-answer{padding-right:8px;}
  .cat-hero-lead{font-size:16px;}
}
@media screen and (max-width:640px){
  .section{padding:56px 0;}
  .cat-hero{padding:112px 0 52px;}
  .hero-actions{gap:10px;}
  .hero-actions .btn{width:100%;}
  .hero-trust{grid-template-columns:1fr;gap:12px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .footer-desc{max-width:100%;}
  .cta-actions .btn{width:100%;}
  .cta-band{border-radius:14px;}
}

/* roulang page: category2 */
:root{
  --bg:#F5F8FB;
  --primary:#256EB5;
  --primary-dark:#174E86;
  --primary-soft:#E6F0F9;
  --teal:#2A9D8F;
  --orange:#E9A23F;
  --ink:#1D2A36;
  --muted:#5C6D7A;
  --border:#DCE8F1;
  --line:#E3ECF4;
  --card-border:#E2EAF2;
  --footer-bg:#142B3D;
  --radius-card:12px;
  --radius-img:12px;
  --radius-pill:999px;
  --shadow-sm:0 6px 18px rgba(35,75,110,.06);
  --shadow-md:0 14px 30px rgba(35,75,110,.12);
  --shadow-btn:0 8px 20px rgba(37,110,181,.25);
  --max:1220px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;background:#E8EEF3;border-radius:var(--radius-img);}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--primary-dark);}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0 0 16px;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:.2px;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}

.grid-container{max-width:var(--max);padding-left:24px;padding-right:24px;margin-left:auto;margin-right:auto;}
@media screen and (max-width:640px){
  .grid-container{padding-left:16px;padding-right:16px;}
}

/* ---------- Header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  height:78px;
  z-index:60;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  height:78px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.logo{display:flex;align-items:center;gap:12px;color:var(--ink);}
.logo:hover{color:var(--ink);}
.logo-mark{
  width:38px;height:38px;flex:0 0 38px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:11px;
  background:linear-gradient(140deg,#2C79C2,#174E86);
  color:#fff;font-size:17px;
  box-shadow:0 6px 14px rgba(37,110,181,.28);
}
.logo-text{display:flex;flex-direction:column;line-height:1.25;}
.logo-name{font-size:18px;font-weight:700;letter-spacing:.4px;}
.logo-sub{font-size:11px;color:var(--muted);letter-spacing:.6px;}
.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;
  padding:10px 16px;
  font-size:15px;
  color:var(--muted);
  font-weight:500;
  border-radius:8px;
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--primary);background:var(--primary-soft);}
.nav-link.is-active{color:var(--primary);font-weight:600;}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:16px;right:16px;bottom:2px;
  height:4px;border-radius:2px;
  background:var(--primary);
}
@media screen and (max-width:899px){
  .main-nav{display:none;}
}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding-top:150px;
  padding-bottom:84px;
  overflow:hidden;
  background-image:
    linear-gradient(180deg,rgba(245,248,251,.94) 0%,rgba(245,248,251,.88) 55%,rgba(245,248,251,.98) 100%),
    url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(90deg,rgba(37,110,181,.07) 1px,transparent 1px),
    linear-gradient(180deg,rgba(37,110,181,.07) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(120deg,rgba(0,0,0,.55),transparent 62%);
  pointer-events:none;
}
.page-hero .grid-container{position:relative;z-index:2;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--primary);
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-pill);
  padding:6px 14px;
  margin-bottom:22px;
  box-shadow:var(--shadow-sm);
}
.hero-title{
  font-size:clamp(34px,4vw,50px);
  font-weight:750;
  letter-spacing:.5px;
  margin-bottom:18px;
}
.hero-title span{color:var(--primary);}
.hero-sub{
  font-size:17px;
  color:var(--muted);
  max-width:640px;
  margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
.hero-note{margin-top:18px;font-size:13px;color:var(--muted);}

.hero-media{position:relative;margin-top:8px;}
.media-frame{
  background:#fff;
  border:1px solid var(--card-border);
  border-radius:16px;
  padding:12px;
  box-shadow:0 18px 40px rgba(35,75,110,.12);
}
.media-frame img{border-radius:10px;width:100%;}
.badge-float{
  position:absolute;
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;
  border:1px solid var(--card-border);
  border-radius:var(--radius-pill);
  padding:8px 14px;
  font-size:13px;
  font-weight:600;
  color:var(--ink);
  box-shadow:var(--shadow-sm);
}
.badge-float i{color:var(--teal);}
.badge-float.b1{top:22px;left:-14px;}
.badge-float.b2{bottom:26px;right:-10px;}
.badge-float.b2 i{color:var(--primary);}
@media screen and (max-width:899px){
  .page-hero{padding-top:118px;padding-bottom:56px;}
  .hero-media{margin-top:36px;}
  .badge-float.b1{left:0;}
  .badge-float.b2{right:0;}
}

/* ---------- Trust row ---------- */
.trust-row{
  margin-top:56px;
  padding-top:24px;
  border-top:1px solid var(--border);
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:16px;
}
.trust-item{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--muted);}
.trust-item i{color:var(--primary);font-size:15px;}
@media screen and (max-width:899px){
  .trust-row{grid-template-columns:repeat(2,1fr);gap:18px 12px;margin-top:40px;}
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;
  border-radius:10px;
  font-weight:600;
  cursor:pointer;
  transition:background .22s ease,color .22s ease,box-shadow .22s ease,transform .22s ease,border-color .22s ease;
  white-space:nowrap;
}
.btn-lg{height:48px;padding:0 26px;font-size:16px;}
.btn-md{height:40px;padding:0 20px;font-size:15px;}
.btn-sm{height:32px;padding:0 14px;font-size:13px;border-radius:8px;}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow-btn);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 14px 28px rgba(37,110,181,.34);}
.btn-ghost{background:#fff;border-color:var(--border);color:var(--primary);}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow-sm);}
.btn-text{color:var(--primary);font-weight:600;display:inline-flex;align-items:center;gap:6px;padding:6px 0;border-bottom:1px solid transparent;}
.btn-text:hover{border-bottom-color:var(--primary);color:var(--primary-dark);}

/* ---------- Section ---------- */
.section{padding:100px 0;scroll-margin-top:96px;}
.section--soft{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:48px;}
.section-tag{
  display:inline-block;
  font-size:13px;
  letter-spacing:2px;
  color:var(--primary);
  font-weight:600;
  margin-bottom:14px;
}
.section-tag::before{
  content:"";
  display:inline-block;width:22px;height:1px;
  background:var(--primary);
  vertical-align:middle;
  margin-right:10px;
}
.section-title{font-size:clamp(26px,2.6vw,34px);font-weight:700;margin-bottom:14px;}
.section-sub{font-size:16px;color:var(--muted);max-width:720px;}
@media screen and (max-width:1024px){
  .section{padding:72px 0;}
}
@media screen and (max-width:640px){
  .section{padding:56px 0;}
  .section-head{margin-bottom:32px;}
}

/* ---------- Steps ---------- */
.steps-wrap{position:relative;}
.steps-wrap::before{
  content:"";
  position:absolute;
  left:23px;top:14px;bottom:14px;
  width:1px;
  background:linear-gradient(180deg,var(--border),rgba(220,232,241,.15));
}
.step-item{
  position:relative;
  display:grid;
  grid-template-columns:48px 1fr;
  gap:24px;
  padding:0 0 44px 0;
}
.step-item:last-child{padding-bottom:0;}
.step-num{
  width:48px;height:48px;
  border-radius:50%;
  background:#fff;
  border:1px solid var(--border);
  color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:15px;
  box-shadow:var(--shadow-sm);
  z-index:2;
}
.step-body{
  background:#fff;
  border:1px solid var(--card-border);
  border-radius:var(--radius-card);
  padding:24px 26px;
  box-shadow:var(--shadow-sm);
  transition:box-shadow .25s ease,transform .25s ease;
}
.step-body:hover{box-shadow:var(--shadow-md);transform:translateY(-4px);}
.step-body h3{font-size:19px;margin-bottom:10px;}
.step-body p{font-size:15px;color:var(--muted);margin-bottom:14px;}
.step-meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;
  padding:4px 12px;
  border-radius:var(--radius-pill);
  border:1px solid var(--border);
  background:var(--primary-soft);
  color:var(--primary-dark);
  font-weight:600;
}
.tag-ok{background:rgba(42,157,143,.1);border-color:rgba(42,157,143,.28);color:#217C71;}
.tag-warn{background:rgba(233,162,63,.12);border-color:rgba(233,162,63,.32);color:#9A6716;}
.tag-plain{background:#fff;color:var(--muted);font-weight:500;}
@media screen and (max-width:640px){
  .step-item{grid-template-columns:40px 1fr;gap:16px;}
  .step-num{width:40px;height:40px;font-size:14px;}
  .steps-wrap::before{left:19px;}
  .step-body{padding:20px;}
}

/* ---------- Verify list ---------- */
.verify-list{border-top:1px solid var(--line);}
.verify-row{
  display:grid;
  grid-template-columns:230px 1fr 130px;
  gap:20px;
  align-items:center;
  padding:20px 4px;
  border-bottom:1px solid var(--line);
  transition:background .2s ease;
}
.verify-row:hover{background:#fff;}
.verify-name{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:600;color:var(--ink);}
.verify-name i{color:var(--primary);font-size:14px;}
.verify-point{font-size:15px;color:var(--muted);}
.verify-state{justify-self:start;}
@media screen and (max-width:899px){
  .verify-row{grid-template-columns:1fr;gap:8px;padding:18px 4px;}
  .verify-state{justify-self:start;margin-top:4px;}
}

/* ---------- Compare ---------- */
.compare{border:1px solid var(--card-border);border-radius:var(--radius-card);overflow:hidden;background:#fff;box-shadow:var(--shadow-sm);}
.compare-head{
  display:grid;grid-template-columns:1fr 1fr;
  background:var(--primary-soft);
  font-size:14px;font-weight:600;color:var(--primary-dark);
}
.compare-head div{padding:16px 22px;}
.compare-head div:first-child{border-right:1px solid var(--card-border);}
.compare-row{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);}
.compare-row > div{padding:18px 22px;font-size:15px;color:var(--muted);display:flex;gap:10px;align-items:flex-start;}
.compare-row > div:first-child{border-right:1px solid var(--line);color:var(--ink);}
.compare-row i{flex:0 0 auto;margin-top:5px;font-size:13px;}
.compare-row .ico-ok{color:var(--teal);}
.compare-row .ico-warn{color:var(--orange);}
@media screen and (max-width:640px){
  .compare-head{grid-template-columns:1fr;font-size:13px;}
  .compare-head div:first-child{border-right:none;border-bottom:1px solid var(--card-border);}
  .compare-row{grid-template-columns:1fr;}
  .compare-row > div:first-child{border-right:none;border-bottom:1px solid var(--line);}
  .compare-row > div{padding:14px 18px;font-size:14px;}
}

/* ---------- Scene list ---------- */
.scene-list{display:grid;gap:0;border-top:1px solid var(--line);}
.scene-item{
  display:grid;
  grid-template-columns:64px 260px 1fr;
  gap:20px;
  align-items:baseline;
  padding:26px 4px;
  border-bottom:1px solid var(--line);
}
.scene-idx{font-size:13px;color:var(--primary);font-weight:700;letter-spacing:1px;}
.scene-title{font-size:17px;font-weight:600;}
.scene-desc{font-size:15px;color:var(--muted);}
@media screen and (max-width:899px){
  .scene-item{grid-template-columns:1fr;gap:6px;padding:20px 4px;}
  .scene-idx{font-size:12px;}
}

/* ---------- Feature grid (with image) ---------- */
.media-split{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;}
.media-split .media-frame{box-shadow:var(--shadow-sm);}
.media-split h3{font-size:22px;margin-bottom:14px;}
.media-split p{font-size:15px;color:var(--muted);}
.mini-list{margin-top:20px;display:grid;gap:12px;}
.mini-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--ink);}
.mini-list i{color:var(--teal);margin-top:6px;font-size:13px;}
@media screen and (max-width:899px){
  .media-split{grid-template-columns:1fr;gap:28px;}
}

/* ---------- FAQ ---------- */
.faq-list{max-width:920px;margin:0 auto;}
.faq-item{
  background:#fff;
  border:1px solid var(--card-border);
  border-radius:var(--radius-card);
  margin-bottom:14px;
  box-shadow:var(--shadow-sm);
  overflow:hidden;
}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:20px 28px;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"\f067";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  font-size:12px;
  color:var(--primary);
  flex:0 0 auto;
}
.faq-item[open] summary::after{content:"\f068";}
.faq-item[open]{box-shadow:var(--shadow-md);}
.faq-body{
  padding:0 40px 24px 40px;
  font-size:15px;
  color:var(--muted);
  border-top:1px solid var(--line);
  padding-top:18px;
  margin-top:2px;
}
@media screen and (max-width:640px){
  .faq-item summary{padding:16px 18px;font-size:15px;}
  .faq-body{padding:14px 18px 20px 18px;}
}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--primary-soft);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
  padding:64px 0;
  scroll-margin-top:96px;
}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.cta-inner h2{font-size:clamp(22px,2.3vw,29px);margin-bottom:10px;}
.cta-inner p{font-size:15px;color:var(--muted);margin:0;max-width:620px;}
@media screen and (max-width:899px){
  .cta-band{padding:44px 0;}
}

/* ---------- Footer ---------- */
.site-footer{background:var(--footer-bg);color:#C7D6E2;padding-top:72px;font-size:14px;}
.footer-top{padding-bottom:44px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.footer-brand-name{font-size:17px;font-weight:700;color:#fff;letter-spacing:.4px;}
.footer-brand-sub{font-size:11px;color:#8FA6B8;letter-spacing:.6px;}
.footer-desc{font-size:14px;color:#A9BECD;line-height:1.8;margin:0;max-width:420px;}
.footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{color:#A9BECD;font-size:14px;}
.footer-links a:hover{color:#fff;}
.footer-contact{display:flex;flex-direction:column;gap:12px;}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;color:#A9BECD;font-size:13.5px;line-height:1.7;}
.footer-contact i{color:#5F8CB8;margin-top:5px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
}
.footer-legal{font-size:13px;color:#8FA6B8;}
.footer-bottom-links{display:flex;flex-wrap:wrap;gap:20px;}
.footer-bottom-links a{font-size:13px;color:#8FA6B8;}
.footer-bottom-links a:hover{color:#fff;}
@media screen and (max-width:899px){
  .site-footer{padding-top:52px;}
  .footer-top > .cell{margin-bottom:28px;}
}

/* ---------- Mobile tabbar ---------- */
.mobile-tabbar{display:none;}
@media screen and (max-width:899px){
  .mobile-tabbar{
    display:flex;
    position:fixed;
    left:0;right:0;bottom:0;
    height:calc(58px + env(safe-area-inset-bottom,0px));
    padding-bottom:env(safe-area-inset-bottom,0px);
    background:rgba(255,255,255,.96);
    backdrop-filter:blur(10px);
    border-top:1px solid var(--line);
    z-index:70;
  }
  .tab-item{
    flex:1;
    display:flex;flex-direction:column;align-items:center;justify-content:center;
    gap:3px;
    font-size:10.5px;
    color:#8395A3;
  }
  .tab-item i{font-size:17px;}
  .tab-item.is-active{color:var(--primary);}
  .tab-item:hover{color:var(--primary);}
  body{padding-bottom:78px;}
}

/* ---------- Floating CTA ---------- */
.float-cta{
  position:fixed;
  right:24px;
  bottom:24px;
  height:42px;
  display:inline-flex;align-items:center;gap:8px;
  padding:0 20px;
  border-radius:21px;
  background:var(--primary);
  color:#fff;
  font-size:14px;
  font-weight:600;
  box-shadow:0 8px 24px rgba(37,110,181,.35);
  z-index:80;
  transition:background .22s ease,transform .22s ease,box-shadow .22s ease;
}
.float-cta:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 28px rgba(37,110,181,.42);}
@media screen and (max-width:899px){
  .float-cta{
    right:16px;
    bottom:calc(58px + env(safe-area-inset-bottom,0px) + 16px);
    height:42px;
    padding:0 16px;
    font-size:13px;
  }
}

/* roulang page: category3 */
:root{
  --bg:#F5F8FB;
  --primary:#256EB5;
  --primary-dark:#174E86;
  --primary-soft:#E6F0F9;
  --accent:#2A9D8F;
  --warm:#E9A23F;
  --ink:#1D2A36;
  --muted:#5C6D7A;
  --line:#DCE8F1;
  --card-border:#E2EAF2;
  --radius-card:12px;
  --radius-img:12px;
  --radius-pill:999px;
  --shadow-card:0 6px 18px rgba(35,75,110,.06);
  --shadow-hover:0 14px 30px rgba(35,75,110,.12);
  --shadow-btn:0 8px 24px rgba(37,110,181,.35);
  --maxw:1220px;
  --font-cn:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}

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

body{
  margin:0;
  padding-top:78px;
  padding-bottom:40px;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;display:block;background:#E8EEF3;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--primary-dark);}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}

h1,h2,h3,h4{line-height:1.3;color:var(--ink);margin:0;font-weight:700;letter-spacing:.2px;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}

.grid-container{max-width:var(--maxw);padding-left:24px;padding-right:24px;}

/* ---------- Header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  height:78px;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(160%) blur(10px);
  -webkit-backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  height:78px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.logo{display:flex;align-items:center;gap:12px;}
.logo-mark{
  width:40px;height:40px;flex:0 0 40px;
  display:flex;align-items:center;justify-content:center;
  border-radius:11px;
  background:linear-gradient(140deg,#2E7CC4,#174E86);
  color:#fff;
  font-size:17px;
  box-shadow:0 6px 16px rgba(37,110,181,.28);
}
.logo-text{display:flex;flex-direction:column;line-height:1.25;}
.logo-name{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:.3px;}
.logo-sub{font-size:11px;color:var(--muted);letter-spacing:.6px;}

.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;
  padding:10px 14px;
  font-size:15px;
  color:var(--muted);
  border-radius:8px;
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--primary);background:var(--primary-soft);}
.nav-link.is-active{color:var(--primary);font-weight:600;}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:3px;
  border-radius:2px;
  background:var(--primary);
}

/* ---------- Page hero ---------- */
.page-hero{
  position:relative;
  padding:76px 0 84px;
  background:#EAF2FA url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(105deg,rgba(245,248,251,.97) 0%,rgba(245,248,251,.92) 48%,rgba(230,240,249,.74) 100%);
  pointer-events:none;
}
.page-hero .grid-container{position:relative;z-index:2;}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12px;color:var(--muted);
  margin-bottom:22px;
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:#B4C6D4;}
.breadcrumb .current{color:var(--primary);font-weight:600;}

.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;
  border-radius:var(--radius-pill);
  background:#fff;
  border:1px solid #CFE2F2;
  color:var(--primary);
  font-size:12.5px;
  letter-spacing:.4px;
  box-shadow:var(--shadow-card);
  margin-bottom:20px;
}
.page-hero h1{
  font-size:clamp(30px,4vw,44px);
  font-weight:720;
  letter-spacing:-.2px;
  margin-bottom:18px;
  max-width:820px;
}
.hero-lead{
  font-size:16.5px;
  color:var(--muted);
  max-width:760px;
  margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  border-radius:10px;
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  padding:0 24px;
  height:48px;
  cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow-btn);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 28px rgba(23,78,134,.38);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--primary);border-color:#CFE2F2;box-shadow:var(--shadow-card);}
.btn-ghost:hover{color:var(--primary-dark);border-color:#B6D2E9;transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.btn-md{height:40px;font-size:14.5px;padding:0 20px;}
.btn-sm{height:32px;font-size:13px;padding:0 15px;border-radius:8px;}

/* ---------- Section base ---------- */
.section{padding:100px 0;scroll-margin-top:96px;}
.section-alt{background:#fff;}
.section-head{max-width:760px;margin-bottom:52px;}
.section-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:1.6px;
  color:var(--primary);
  font-weight:600;
  margin-bottom:14px;
}
.section-eyebrow::before{
  content:"";width:18px;height:2px;border-radius:2px;background:var(--primary);
}
.section-title{font-size:clamp(24px,3vw,32px);font-weight:700;margin-bottom:16px;}
.section-sub{color:var(--muted);font-size:15.5px;max-width:700px;}

/* ---------- Overview cards ---------- */
.overview-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.stat-card{
  background:#fff;
  border:1px solid var(--card-border);
  border-radius:var(--radius-card);
  padding:26px 24px;
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,box-shadow .25s ease;
}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.stat-card.is-accent{background:var(--primary-soft);border-color:#CFE2F2;}
.stat-icon{
  width:38px;height:38px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid #D8E7F3;
  color:var(--primary);font-size:15px;margin-bottom:16px;
}
.stat-card.is-accent .stat-icon{background:var(--primary);border-color:var(--primary);color:#fff;}
.stat-label{font-size:12.5px;color:var(--muted);letter-spacing:.6px;margin-bottom:8px;}
.stat-value{font-size:19px;font-weight:700;margin-bottom:10px;letter-spacing:.2px;}
.stat-text{font-size:14px;color:var(--muted);line-height:1.75;}

/* ---------- Timeline ---------- */
.timeline{
  position:relative;
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:22px;
  margin-top:12px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:8%;right:8%;top:28px;
  border-top:1px dashed #BBD5EA;
}
.tl-step{position:relative;text-align:center;padding:0 4px;}
.tl-node{
  position:relative;z-index:1;
  width:56px;height:56px;margin:0 auto 20px;
  border-radius:50%;
  background:#fff;
  border:1px solid #CFE2F2;
  color:var(--primary);
  font-size:15px;
  font-weight:700;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 18px rgba(35,75,110,.08);
  transition:transform .25s ease,box-shadow .25s ease;
}
.tl-step:hover .tl-node{transform:translateY(-4px);box-shadow:0 14px 26px rgba(35,75,110,.14);}
.tl-step:first-child .tl-node{background:var(--primary);border-color:var(--primary);color:#fff;}
.tl-title{font-size:17px;font-weight:650;margin-bottom:10px;}
.tl-text{font-size:14px;color:var(--muted);line-height:1.75;}

/* ---------- Detail accordion ---------- */
.detail-table{
  border:1px solid var(--card-border);
  border-radius:var(--radius-card);
  background:#fff;
  box-shadow:var(--shadow-card);
  overflow:hidden;
}
.detail-row{border-bottom:1px solid #E9F1F8;}
.detail-row:last-child{border-bottom:0;}
.detail-sum{
  list-style:none;
  cursor:pointer;
  padding:20px 26px;
  display:flex;align-items:center;gap:16px;
  font-size:16.5px;
  font-weight:620;
  color:var(--ink);
  transition:background .2s ease;
}
.detail-sum::-webkit-details-marker{display:none;}
.detail-sum:hover{background:#F8FBFE;}
.detail-sum::after{
  content:"+";
  margin-left:auto;
  font-size:18px;
  color:var(--primary);
  line-height:1;
  transition:transform .2s ease;
}
.detail-row[open] .detail-sum::after{content:"−";}
.detail-row[open] .detail-sum{background:#F5FAFE;}
.detail-name{flex:1 1 auto;}
.detail-tag{
  font-size:11.5px;
  padding:3px 10px;
  border-radius:var(--radius-pill);
  background:var(--primary-soft);
  color:var(--primary);
  letter-spacing:.4px;
  font-weight:500;
}
.detail-tag.tag-green{background:#E4F4F1;color:#21806F;}
.detail-tag.tag-warm{background:#FCF1E0;color:#B47A21;}
.detail-body{
  padding:4px 40px 26px 40px;
  color:var(--muted);
  font-size:14.8px;
  line-height:1.85;
}
.detail-body p+p{margin-top:10px;}
.detail-body ul{margin-top:12px;}
.detail-body li{
  position:relative;
  padding-left:18px;
  margin-bottom:8px;
}
.detail-body li::before{
  content:"";
  position:absolute;
  left:0;top:12px;
  width:6px;height:6px;border-radius:50%;
  background:#A9CBE7;
}

/* ---------- Scene list ---------- */
.scene-list{border-top:1px solid #E3ECF4;}
.scene-row{
  display:flex;align-items:flex-start;gap:20px;
  padding:24px 6px;
  border-bottom:1px solid #E3ECF4;
  transition:background .2s ease;
}
.scene-row:hover{background:#FBFCFF;}
.scene-icon{
  flex:0 0 44px;width:44px;height:44px;
  border-radius:11px;
  background:var(--primary-soft);
  color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;
}
.scene-main{flex:1 1 auto;min-width:0;}
.scene-name{font-size:17px;font-weight:650;margin-bottom:8px;}
.scene-desc{font-size:14.5px;color:var(--muted);line-height:1.8;max-width:760px;}
.scene-link{
  flex:0 0 auto;
  align-self:center;
  font-size:14px;
  font-weight:600;
  display:inline-flex;align-items:center;gap:7px;
}
.scene-link i{font-size:12px;transition:transform .2s ease;}
.scene-link:hover i{transform:translateX(3px);}

/* ---------- Assure split ---------- */
.assure-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.assure-figure{
  position:relative;
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid var(--card-border);
  background:#E8EEF3;
  box-shadow:var(--shadow-card);
}
.assure-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;}
.assure-badge{
  position:absolute;
  left:18px;bottom:18px;
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.94);
  border:1px solid #D8E7F3;
  border-radius:var(--radius-pill);
  padding:7px 15px;
  font-size:12.5px;
  color:var(--primary-dark);
  font-weight:600;
  box-shadow:0 8px 22px rgba(35,75,110,.14);
}
.assure-list{margin-top:28px;}
.assure-item{
  display:flex;gap:16px;
  padding:18px 0;
  border-bottom:1px solid #E3ECF4;
}
.assure-item:last-child{border-bottom:0;}
.assure-item i{
  flex:0 0 auto;
  margin-top:5px;
  color:var(--accent);
  font-size:16px;
}
.assure-item h4{font-size:16px;font-weight:650;margin-bottom:6px;}
.assure-item p{font-size:14.5px;color:var(--muted);line-height:1.8;}

/* ---------- FAQ ---------- */
.faq-top{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:18px;margin-bottom:36px;
}
.faq-item{
  background:#fff;
  border:1px solid var(--card-border);
  border-radius:var(--radius-card);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .2s ease,box-shadow .25s ease;
}
.faq-item[open]{border-color:#CFE2F2;box-shadow:var(--shadow-card);}
.faq-q{
  list-style:none;cursor:pointer;
  padding:20px 26px;
  padding-right:60px;
  position:relative;
  font-size:16.5px;
  font-weight:620;
  line-height:1.6;
  color:var(--ink);
}
.faq-q::-webkit-details-marker{display:none;}
.faq-q::after{
  content:"+";
  position:absolute;
  right:26px;top:20px;
  font-size:19px;
  color:var(--primary);
  line-height:1;
}
.faq-item[open] .faq-q::after{content:"−";}
.faq-a{
  padding:0 40px 24px 40px;
  color:var(--muted);
  font-size:15px;
  line-height:1.85;
}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--primary-soft);
  border-top:1px solid #D5E6F5;
  border-bottom:1px solid #D5E6F5;
  padding:64px 0;
  scroll-margin-top:96px;
}
.cta-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:26px;
}
.cta-title{font-size:clamp(21px,2.4vw,27px);font-weight:700;margin-bottom:10px;}
.cta-text{color:var(--muted);font-size:15px;max-width:640px;}

/* ---------- Footer ---------- */
.site-footer{
  background:#142B3D;
  color:#B9CBD9;
  padding:72px 0 32px;
  font-size:14px;
}
.footer-top{padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.09);}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.footer-brand .logo-mark{box-shadow:none;}
.footer-brand-name{font-size:17px;font-weight:700;color:#fff;letter-spacing:.3px;}
.footer-brand-sub{font-size:11.5px;color:#8FA6B8;letter-spacing:.5px;}
.footer-desc{color:#9FB3C4;font-size:13.5px;line-height:1.85;max-width:380px;}
.footer-title{font-size:15px;font-weight:650;color:#fff;margin-bottom:18px;}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{color:#9FB3C4;font-size:13.5px;}
.footer-links a:hover{color:#fff;}
.footer-contact{display:flex;flex-direction:column;gap:12px;}
.footer-contact li{display:flex;gap:10px;color:#9FB3C4;font-size:13.5px;line-height:1.7;}
.footer-contact i{color:#5C9BD1;margin-top:4px;}
.footer-bottom{
  padding-top:26px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
}
.footer-legal{font-size:12.5px;color:#7E93A4;}
.footer-bottom-links{display:flex;flex-wrap:wrap;gap:18px;}
.footer-bottom-links a{font-size:12.5px;color:#9FB3C4;}
.footer-bottom-links a:hover{color:#fff;}

/* ---------- Floating CTA ---------- */
.float-cta{
  position:fixed;
  right:32px;bottom:32px;
  z-index:130;
  height:42px;
  padding:0 22px;
  border-radius:21px;
  background:var(--primary);
  color:#fff;
  font-size:14px;
  font-weight:600;
  display:inline-flex;align-items:center;gap:9px;
  box-shadow:0 8px 24px rgba(37,110,181,.35);
  transition:transform .2s ease,background .2s ease,box-shadow .2s ease;
}
.float-cta:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 14px 30px rgba(23,78,134,.4);}

/* ---------- Mobile tabbar ---------- */
.tabbar{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:125;
  height:calc(58px + env(safe-area-inset-bottom,0px));
  padding-bottom:env(safe-area-inset-bottom,0px);
  background:rgba(255,255,255,.97);
  border-top:1px solid var(--line);
  box-shadow:0 -6px 18px rgba(35,75,110,.06);
}
.tab-item{
  flex:1 1 0;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  height:58px;
  font-size:11px;
  color:#8395A3;
}
.tab-item i{font-size:17px;}
.tab-item:hover{color:var(--primary);}
.tab-item.is-active{color:var(--primary);font-weight:600;}

/* ---------- Responsive ---------- */
@media (max-width:1099px){
  .overview-grid{grid-template-columns:repeat(2,1fr);}
  .timeline{grid-template-columns:repeat(3,1fr);row-gap:38px;}
  .timeline::before{display:none;}
  .assure-wrap{grid-template-columns:1fr;gap:36px;}
}

@media (max-width:899px){
  body{padding-top:64px;padding-bottom:88px;}
  .site-header{height:64px;}
  .header-inner{height:64px;}
  .main-nav{display:none;}
  .tabbar{display:flex;}
  .section{padding:56px 0;}
  .page-hero{padding:52px 0 60px;}
  .grid-container{padding-left:16px;padding-right:16px;}
  .float-cta{right:16px;bottom:74px;height:42px;padding:0 18px;font-size:13px;}
}

@media (max-width:767px){
  .overview-grid{grid-template-columns:1fr;gap:16px;}
  .timeline{grid-template-columns:1fr;gap:0;padding-left:0;}
  .timeline::before{
    display:block;
    left:27px;right:auto;top:14px;bottom:38px;
    border-top:0;
    border-left:1px dashed #BBD5EA;
  }
  .tl-step{
    text-align:left;
    display:flex;
    gap:18px;
    padding:0 0 26px;
  }
  .tl-node{margin:0;flex:0 0 56px;}
  .tl-body{padding-top:8px;}
  .detail-sum{padding:18px 18px;font-size:15.5px;flex-wrap:wrap;gap:10px;}
  .detail-tag{order:3;}
  .detail-sum::after{position:absolute;right:18px;top:20px;}
  .detail-sum{position:relative;padding-right:52px;}
  .detail-body{padding:4px 20px 22px 20px;}
  .scene-row{flex-wrap:wrap;gap:14px;padding:20px 0;}
  .scene-link{align-self:flex-start;margin-left:64px;}
  .faq-q{font-size:15.5px;padding:18px 52px 18px 18px;}
  .faq-q::after{right:18px;top:18px;}
  .faq-a{padding:0 18px 20px 18px;font-size:14.5px;}
  .cta-band{padding:48px 0;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .footer-top{padding-bottom:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .site-footer{padding:52px 0 90px;}
}

/* roulang page: category4 */
:root{
  --bg:#F5F8FB;
  --card:#FFFFFF;
  --primary:#256EB5;
  --primary-dark:#174E86;
  --primary-soft:#E6F0F9;
  --teal:#2A9D8F;
  --amber:#E9A23F;
  --ink:#1D2A36;
  --muted:#5C6D7A;
  --line:#DCE8F1;
  --line-soft:#E3ECF4;
  --footer:#142B3D;
  --radius-card:12px;
  --radius-img:14px;
  --radius-pill:999px;
  --shadow-card:0 6px 18px rgba(35,75,110,.06);
  --shadow-hover:0 14px 30px rgba(35,75,110,.12);
  --shadow-btn:0 8px 24px rgba(37,110,181,.35);
  --container:1220px;
  --font-cn:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding-top:78px;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;background:#E8EEF3;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--primary-dark);}
h1,h2,h3,h4,h5{margin:0;line-height:1.3;font-weight:700;letter-spacing:.01em;color:var(--ink);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}

section[id],div[id]{scroll-margin-top:96px;}

.grid-container{
  max-width:var(--container);
  padding-left:24px;
  padding-right:24px;
}
.grid-x.grid-margin-x{margin-left:-16px;margin-right:-16px;}
.grid-x.grid-margin-x > .cell{padding-left:16px;padding-right:16px;}

/* ---------- Header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  height:78px;
  z-index:1000;
  background:rgba(255,255,255,.94);
  border-bottom:1px solid var(--line);
}
.header-inner{
  height:78px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  max-width:var(--container);
}
.logo{display:flex;align-items:center;gap:12px;color:var(--ink);}
.logo-mark{
  width:40px;height:40px;
  flex:0 0 40px;
  border-radius:12px;
  background:var(--primary-soft);
  color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  font-size:17px;
  border:1px solid #D3E4F4;
}
.logo-text{display:flex;flex-direction:column;line-height:1.2;}
.logo-name{font-size:18px;font-weight:700;letter-spacing:.01em;}
.logo-sub{font-size:11px;color:var(--muted);letter-spacing:.04em;}
.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;
  padding:8px 14px;
  font-size:15px;
  color:var(--muted);
  border-radius:8px;
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--primary-dark);background:#F1F6FB;}
.nav-link.is-active{color:var(--primary-dark);font-weight:600;}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:50%;bottom:-2px;
  width:18px;height:4px;
  margin-left:-9px;
  border-radius:2px;
  background:var(--primary);
}
.logo:hover{color:var(--primary-dark);}

/* ---------- Mobile tabbar ---------- */
.mobile-tabbar{display:none;}
.float-cta{
  position:fixed;
  right:28px;
  bottom:28px;
  z-index:950;
  height:42px;
  padding:0 22px;
  border-radius:21px;
  background:var(--primary);
  color:#fff;
  font-size:14px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:8px;
  box-shadow:var(--shadow-btn);
  transition:transform .2s ease,background .2s ease,box-shadow .2s ease;
}
.float-cta:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 28px rgba(37,110,181,.42);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:10px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s ease,background .2s ease,box-shadow .2s ease,color .2s ease,border-color .2s ease;
}
.btn-lg{height:48px;padding:0 26px;font-size:16px;}
.btn-md{height:40px;padding:0 20px;font-size:15px;}
.btn-sm{height:32px;padding:0 14px;font-size:13px;border-radius:8px;}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 18px rgba(37,110,181,.24);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(37,110,181,.32);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--primary-dark);border-color:#CFE0EF;border-radius:8px;}
.btn-ghost:hover{background:#F4F9FD;border-color:var(--primary);color:var(--primary-dark);transform:translateY(-2px);}
.btn-quiet{background:transparent;color:var(--primary);padding:0;height:auto;border:none;}
.btn-quiet:hover{color:var(--primary-dark);}

/* ---------- Section basics ---------- */
.section{padding:100px 0;}
.section-tight{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:48px;}
.section-label{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.12em;
  color:var(--primary);
  background:var(--primary-soft);
  border-radius:var(--radius-pill);
  padding:6px 14px;
  margin-bottom:18px;
  font-weight:600;
}
.section-title{font-size:clamp(24px,3vw,32px);font-weight:700;margin-bottom:14px;}
.section-sub{font-size:16px;color:var(--muted);line-height:1.85;}

/* ---------- Page hero ---------- */
.page-hero{
  position:relative;
  padding:76px 0 88px;
  background:
    linear-gradient(180deg,rgba(245,248,251,.94) 0%,rgba(245,248,251,.97) 60%,rgba(245,248,251,1) 100%),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-bottom:1px solid var(--line-soft);
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;
  top:0;left:0;right:0;bottom:0;
  background-image:
    linear-gradient(rgba(37,110,181,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(37,110,181,.06) 1px,transparent 1px);
  background-size:72px 72px;
  pointer-events:none;
}
.page-hero .grid-container{position:relative;z-index:2;}
.breadcrumb{font-size:12px;color:var(--muted);margin-bottom:22px;letter-spacing:.02em;}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb span{color:var(--ink);}
.page-hero h1{
  font-size:clamp(30px,4vw,44px);
  font-weight:750;
  max-width:20em;
  margin-bottom:20px;
}
.hero-lead{
  font-size:17px;
  color:var(--muted);
  max-width:44em;
  line-height:1.9;
  margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px;}
.hero-points{display:flex;flex-wrap:wrap;gap:12px 32px;}
.hero-points li{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--muted);
}
.hero-points i{color:var(--teal);font-size:13px;}

/* ---------- Quick cards ---------- */
.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.quick-card{
  background:var(--card);
  border:1px solid #E2EAF2;
  border-radius:var(--radius-card);
  padding:28px 24px;
  box-shadow:var(--shadow-card);
  display:flex;
  flex-direction:column;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.quick-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#CFE0EF;}
.quick-icon{
  width:44px;height:44px;
  border-radius:12px;
  background:var(--primary-soft);
  color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  font-size:17px;
  margin-bottom:18px;
}
.quick-card h3{font-size:18px;margin-bottom:10px;}
.quick-card p{font-size:14px;color:var(--muted);line-height:1.85;margin-bottom:18px;}
.quick-card .quick-link{margin-top:auto;font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.quick-card .quick-link i{font-size:12px;transition:transform .2s ease;}
.quick-card:hover .quick-link i{transform:translateX(3px);}

/* ---------- Jump bar ---------- */
.jump-bar{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  padding:18px 20px;
  background:#F8FBFE;
  border:1px solid var(--line-soft);
  border-radius:var(--radius-card);
  margin-bottom:56px;
}
.jump-bar span{font-size:13px;color:var(--muted);margin-right:6px;align-self:center;}
.jump-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:32px;
  padding:0 14px;
  border-radius:var(--radius-pill);
  background:#fff;
  border:1px solid #DCE8F1;
  font-size:13px;
  color:var(--muted);
  transition:all .2s ease;
}
.jump-link:hover{color:var(--primary-dark);border-color:var(--primary);background:var(--primary-soft);}

/* ---------- Answer groups ---------- */
.answer-group{
  padding:44px 0;
  border-top:1px solid var(--line-soft);
}
.answer-group:first-of-type{border-top:none;padding-top:0;}
.group-head h3{font-size:20px;margin-bottom:10px;}
.group-head p{font-size:14px;color:var(--muted);line-height:1.8;}
.group-icon{
  width:38px;height:38px;
  border-radius:10px;
  background:var(--primary-soft);
  color:var(--primary);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;
  margin-bottom:14px;
}
.answer-list{border-left:1px solid var(--line-soft);padding-left:32px;}
.answer-item{padding:0 0 26px;margin-bottom:26px;border-bottom:1px solid var(--line-soft);}
.answer-item:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0;}
.answer-item h4{
  font-size:17px;
  font-weight:600;
  margin-bottom:10px;
  display:flex;
  gap:10px;
  line-height:1.55;
}
.answer-item h4::before{
  content:"";
  flex:0 0 6px;
  height:6px;
  margin-top:11px;
  border-radius:50%;
  background:var(--primary);
}
.answer-item p{font-size:15px;color:var(--muted);line-height:1.9;padding-left:16px;}

/* ---------- Process ---------- */
.process-wrap{background:#fff;border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);}
.process-line{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;}
.process-line::before{
  content:"";
  position:absolute;
  top:23px;left:6%;right:6%;
  height:1px;
  background:repeating-linear-gradient(90deg,#CFE0EF 0 8px,transparent 8px 16px);
}
.process-step{position:relative;padding:0 18px;text-align:center;}
.step-num{
  width:46px;height:46px;
  margin:0 auto 20px;
  border-radius:50%;
  background:#fff;
  border:1px solid #CFE0EF;
  color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;
  font-weight:700;
  position:relative;
  z-index:2;
}
.process-step h3{font-size:17px;margin-bottom:10px;}
.process-step p{font-size:14px;color:var(--muted);line-height:1.85;}

/* ---------- Contact / form ---------- */
.contact-panel{
  background:#fff;
  border:1px solid #E2EAF2;
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  padding:40px;
}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.form-row{display:flex;flex-direction:column;gap:8px;}
.form-row.full{grid-column:1 / -1;}
.form-label{font-size:12px;color:var(--muted);letter-spacing:.04em;}
.form-input,.form-select,.form-textarea{
  width:100%;
  height:44px;
  padding:0 14px;
  border:1px solid #DCE8F1;
  border-radius:8px;
  background:#FBFDFF;
  color:var(--ink);
  font-size:15px;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.form-textarea{height:130px;padding:12px 14px;resize:vertical;line-height:1.8;}
.form-input::placeholder,.form-textarea::placeholder{color:#9FB0BD;}
.form-input:focus,.form-select:focus,.form-textarea:focus{
  outline:none;
  border-color:var(--primary);
  background:#fff;
  box-shadow:0 0 0 3px rgba(37,110,181,.12);
}
.form-note{font-size:13px;color:var(--muted);line-height:1.8;margin-top:16px;}
.contact-side{display:flex;flex-direction:column;gap:16px;}
.info-card{
  border:1px solid var(--line-soft);
  border-radius:var(--radius-card);
  padding:22px 22px;
  background:#F8FBFE;
}
.info-card h4{font-size:16px;margin-bottom:8px;display:flex;align-items:center;gap:8px;}
.info-card h4 i{color:var(--primary);font-size:14px;}
.info-card p{font-size:14px;color:var(--muted);line-height:1.85;}
.side-figure{
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid #E2EAF2;
  background:#E8EEF3;
}
.side-figure img{width:100%;height:180px;object-fit:cover;}
.side-figure figcaption{font-size:12px;color:var(--muted);padding:10px 14px;background:#fff;}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--primary-soft);
  border-top:1px solid #D3E4F4;
  border-bottom:1px solid #D3E4F4;
  padding:72px 0;
}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:10px;}
.cta-inner p{font-size:15px;color:var(--muted);max-width:46em;}

/* ---------- Footer ---------- */
.site-footer{background:var(--footer);color:#C6D5E2;padding:72px 0 32px;margin-top:0;}
.footer-top{padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.1);}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.footer-brand .logo-mark{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.14);color:#8FC1E9;}
.footer-brand-name{font-size:17px;font-weight:700;color:#fff;}
.footer-brand-sub{font-size:11px;color:#8FA6B8;letter-spacing:.04em;}
.footer-desc{font-size:14px;line-height:1.9;color:#9FB3C4;max-width:34em;}
.footer-title{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.04em;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:#9FB3C4;}
.footer-links a:hover{color:#fff;}
.footer-contact li{font-size:14px;color:#9FB3C4;line-height:1.9;display:flex;gap:10px;margin-bottom:10px;}
.footer-contact i{color:#6FA8D6;margin-top:6px;font-size:13px;}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:20px;
  flex-wrap:wrap;
  padding-top:26px;
}
.footer-legal{font-size:13px;color:#8DA2B4;}
.footer-bottom-links{display:flex;flex-wrap:wrap;gap:8px 20px;}
.footer-bottom-links a{font-size:13px;color:#9FB3C4;}
.footer-bottom-links a:hover{color:#fff;}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .quick-grid{grid-template-columns:repeat(2,1fr);}
  .process-line{grid-template-columns:repeat(2,1fr);gap:36px 0;}
  .process-line::before{display:none;}
  .section{padding:72px 0;}
}
@media (max-width:899px){
  body{padding-top:66px;padding-bottom:96px;}
  .site-header{height:66px;}
  .header-inner{height:66px;}
  .main-nav{display:none;}
  .logo-mark{width:36px;height:36px;flex:0 0 36px;}
  .logo-name{font-size:16px;}
  .logo-sub{font-size:10px;}
  .mobile-tabbar{
    display:flex;
    position:fixed;
    left:0;right:0;bottom:0;
    z-index:1000;
    height:calc(58px + env(safe-area-inset-bottom));
    padding-bottom:env(safe-area-inset-bottom);
    background:rgba(255,255,255,.98);
    border-top:1px solid var(--line);
  }
  .tab-item{
    flex:1;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:3px;
    font-size:10px;
    color:#8395A3;
    letter-spacing:.02em;
  }
  .tab-item i{font-size:17px;}
  .tab-item.is-active{color:var(--primary);font-weight:600;}
  .float-cta{right:16px;bottom:calc(74px + env(safe-area-inset-bottom));height:42px;padding:0 18px;font-size:13px;}
  .page-hero{padding:48px 0 60px;}
  .hero-lead{font-size:16px;}
  .section{padding:56px 0;}
  .section-tight{padding:52px 0;}
  .section-head{margin-bottom:36px;}
  .contact-panel{padding:26px 20px;}
  .form-grid{grid-template-columns:1fr;}
  .answer-list{border-left:none;padding-left:0;margin-top:24px;}
  .answer-item h4{font-size:16px;}
  .answer-item p{font-size:15px;}
  .cta-band{padding:52px 0;}
  .site-footer{padding:52px 0 28px;}
  .footer-top{padding-bottom:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .grid-container{padding-left:16px;padding-right:16px;}
  .quick-grid{grid-template-columns:1fr;}
  .process-line{grid-template-columns:1fr;}
  .hero-actions .btn{width:100%;}
  .hero-points{gap:10px 20px;}
  .page-hero h1{font-size:28px;}
}