/* roulang page: index */
:root{
  --brand-700:#123A5A;
  --brand-600:#1D5C8C;
  --brand-500:#2A6FA5;
  --brand-100:#E7F0F7;
  --brand-50:#F2F7FB;
  --accent-500:#E4A33C;
  --accent-600:#C9882A;
  --teal-500:#2E9E8F;
  --bg:#F7F9FB;
  --card:#FFFFFF;
  --border:#E2E8EF;
  --text:#1A2836;
  --text-2:#5B6C7D;
  --text-3:#8C99A6;
  --r-card:14px;
  --r-btn:10px;
  --r-img:10px;
  --r-modal:16px;
  --sh-sm:0 1px 2px rgba(18,58,90,.06);
  --sh-md:0 8px 24px rgba(18,58,90,.08);
  --sh-lg:0 18px 48px rgba(18,58,90,.12);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px; --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:96px;
  --ease:cubic-bezier(.4,0,.2,1);

  --bs-primary:#1D5C8C;
  --bs-body-font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --bs-border-radius:10px;
  --bs-link-color:#1D5C8C;
  --bs-link-hover-color:#2A6FA5;
  --bs-body-color:#1A2836;
  --bs-body-bg:#F7F9FB;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--brand-500);}
h1,h2,h3,h4{margin:0;color:var(--text);letter-spacing:-.02em;}
p{margin:0 0 12px;}
ul,ol{margin:0;padding-left:20px;}
button,input,textarea,select{font-family:inherit;font-size:inherit;}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(29,92,140,.18);border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
.sec{padding:96px 0;scroll-margin-top:88px;}
.sec-alt{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.sec-head{max-width:760px;margin-bottom:48px;}
.sec-head h2{font-size:34px;font-weight:600;line-height:1.3;}
.sec-head p{color:var(--text-2);font-size:16px;margin-top:12px;margin-bottom:0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand-600);
  background:var(--brand-100);border-radius:999px;padding:5px 14px;margin-bottom:16px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent-500);}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .25s var(--ease),height .25s var(--ease);
}
.site-header.scrolled{box-shadow:var(--sh-md);}
.nav-inner{display:flex;align-items:center;gap:24px;height:72px;transition:height .25s var(--ease);}
.site-header.scrolled .nav-inner{height:60px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:38px;height:38px;flex-shrink:0;border-radius:11px;
  background:linear-gradient(140deg,var(--brand-600),var(--brand-700));
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-sm);
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:16px;font-weight:700;color:var(--brand-700);letter-spacing:-.01em;}
.brand-text span{font-size:11px;color:var(--text-3);letter-spacing:.06em;}
.nav-chips{display:flex;align-items:center;gap:8px;flex:1;overflow:hidden;}
.nav-chip{
  display:inline-flex;align-items:center;height:36px;padding:0 14px;
  border:1px solid var(--border);border-radius:999px;
  font-size:14px;color:var(--text-2);background:transparent;white-space:nowrap;
  transition:all .2s var(--ease);
}
.nav-chip:hover{border-color:var(--brand-500);color:var(--brand-600);background:var(--brand-50);}
.nav-chip.active{
  background:var(--brand-100);border-color:var(--brand-100);
  color:var(--brand-700);font-weight:600;position:relative;
}
.nav-chip.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:-9px;height:2px;border-radius:2px;background:var(--brand-600);
}
.nav-cta{margin-left:24px;flex-shrink:0;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--border);border-radius:var(--r-btn);
  background:#fff;color:var(--brand-700);align-items:center;justify-content:center;font-size:17px;
}
.mobile-drawer{
  display:none;border-top:1px solid var(--border);background:#fff;padding:16px 20px 24px;
}
.mobile-drawer.open{display:block;}
.mobile-drawer a{
  display:flex;align-items:center;min-height:46px;padding:0 14px;border-radius:var(--r-btn);
  color:var(--text-2);font-size:15px;border:1px solid transparent;
}
.mobile-drawer a:hover{background:var(--brand-50);color:var(--brand-600);}
.mobile-drawer a.active{background:var(--brand-100);color:var(--brand-700);font-weight:600;}

/* ---------- Buttons ---------- */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;transition:all .2s var(--ease);white-space:nowrap;
}
.btn-primary-x{background:var(--brand-600);color:#fff;}
.btn-primary-x:hover{background:var(--brand-500);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md);}
.btn-accent-x{background:var(--accent-500);color:#fff;}
.btn-accent-x:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md);}
.btn-ghost-x{background:#fff;border-color:var(--border);color:var(--text);}
.btn-ghost-x:hover{border-color:var(--brand-600);color:var(--brand-600);}
.btn-x:active{transform:translateY(1px);}
.btn-x:disabled{opacity:.5;cursor:not-allowed;}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#FFFFFF 0%,var(--brand-50) 100%);
  padding:72px 0 56px;
}
.hero::before{
  content:"";position:absolute;right:-140px;top:-120px;width:620px;height:620px;
  border-radius:50%;border:1px solid rgba(29,92,140,.06);pointer-events:none;
}
.hero::after{
  content:"";position:absolute;right:-40px;top:-20px;width:420px;height:420px;
  border-radius:50%;border:1px solid rgba(29,92,140,.05);pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;position:relative;z-index:2;}
.hero h1{
  font-size:48px;font-weight:700;line-height:1.25;letter-spacing:-.02em;color:var(--brand-700);
}
.hero-sub{margin-top:20px;font-size:17px;color:var(--text-2);max-width:560px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px;}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;height:auto;border-radius:var(--r-card);box-shadow:var(--sh-lg);object-fit:cover;
}
.hero-visual::after{
  content:"";position:absolute;inset:0;border-radius:var(--r-card);
  border:1px solid rgba(18,58,90,.06);pointer-events:none;
}
.hero-badge{
  position:absolute;left:-18px;bottom:28px;background:#fff;border-radius:var(--r-card);
  box-shadow:var(--sh-md);padding:14px 18px;display:flex;align-items:center;gap:12px;
}
.hero-badge i{color:var(--accent-500);font-size:18px;}
.hero-badge b{display:block;font-size:14px;color:var(--brand-700);}
.hero-badge span{font-size:12px;color:var(--text-3);}
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);
  margin-top:56px;padding-top:32px;border-top:1px solid var(--border);
}
.metric{padding:0 24px;border-left:1px solid var(--border);}
.metric:first-child{border-left:none;padding-left:0;}
.metric b{display:block;font-size:40px;font-weight:700;color:var(--brand-700);font-variant-numeric:tabular-nums;line-height:1.1;}
.metric span{font-size:14px;color:var(--text-2);}

/* ---------- Features 2+1 ---------- */
.feat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.feat-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  padding:32px;box-shadow:var(--sh-sm);transition:all .25s var(--ease);
}
.feat-card:hover{box-shadow:var(--sh-md);transform:translateY(-4px);border-color:var(--brand-100);}
.feat-card.wide{grid-column:1 / -1;display:grid;grid-template-columns:8fr 4fr;gap:32px;align-items:center;background:var(--brand-50);}
.feat-num{
  font-size:13px;font-weight:700;color:var(--brand-600);letter-spacing:.08em;
  font-variant-numeric:tabular-nums;margin-bottom:14px;display:block;
}
.feat-card h3{font-size:21px;font-weight:600;margin-bottom:10px;}
.feat-card p{color:var(--text-2);font-size:15px;margin:0;}
.feat-card.wide img{border-radius:var(--r-img);width:100%;height:190px;object-fit:cover;}
.feat-list{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--brand-100);color:var(--brand-700);font-size:13px;
}
.tag.teal{background:rgba(46,158,143,.12);color:var(--teal-500);}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;}
.step{padding:0 24px;position:relative;}
.step:first-child{padding-left:0;}
.step-dot{
  width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;font-weight:700;color:var(--brand-600);
  font-variant-numeric:tabular-nums;margin-bottom:20px;position:relative;z-index:2;
}
.step.active .step-dot{background:var(--brand-600);border-color:var(--brand-600);color:#fff;box-shadow:0 8px 20px rgba(29,92,140,.22);}
.steps::before{
  content:"";position:absolute;left:0;right:0;top:22px;height:1px;background:var(--border);
}
.step h3{font-size:19px;font-weight:600;margin-bottom:8px;}
.step p{font-size:15px;color:var(--text-2);margin:0;}
.demo-split{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;margin-top:56px;}
.demo-split img{border-radius:var(--r-card);box-shadow:var(--sh-md);width:100%;height:auto;}
.check-list{list-style:none;padding:0;}
.check-list li{display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed var(--border);font-size:15px;color:var(--text-2);}
.check-list li:last-child{border-bottom:none;}
.check-list i{color:var(--teal-500);margin-top:4px;}

/* ---------- Proof ---------- */
.proof-bar{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;background:var(--brand-700);border-radius:var(--r-card);padding:40px;color:#fff;}
.proof-bar b{display:block;font-size:44px;font-weight:700;font-variant-numeric:tabular-nums;line-height:1.1;color:#fff;}
.proof-bar span{font-size:14px;color:rgba(255,255,255,.72);}
.zig{display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center;margin-top:64px;}
.zig.rev .zig-media{order:2;}
.zig img{border-radius:var(--r-card);box-shadow:var(--sh-md);width:100%;height:300px;object-fit:cover;}
.zig h3{font-size:24px;font-weight:600;margin:10px 0 12px;}
.zig p{color:var(--text-2);font-size:15px;}

/* ---------- Pricing ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;}
.price-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:32px;box-shadow:var(--sh-sm);transition:all .25s var(--ease);position:relative;
}
.price-card:hover{box-shadow:var(--sh-md);transform:translateY(-4px);}
.price-card.featured{border-color:var(--brand-600);box-shadow:var(--sh-lg);transform:translateY(-12px);padding-top:40px;}
.price-card h3{font-size:20px;font-weight:600;margin-bottom:8px;}
.price-card .desc{font-size:14px;color:var(--text-2);margin-bottom:20px;}
.price-card .amount{font-size:44px;font-weight:700;color:var(--brand-700);font-variant-numeric:tabular-nums;line-height:1;}
.price-card .unit{font-size:14px;color:var(--text-3);margin-left:6px;}
.price-card ul{list-style:none;padding:0;margin:24px 0;}
.price-card li{display:flex;gap:10px;padding:9px 0;font-size:15px;color:var(--text-2);}
.price-card li i{color:var(--brand-600);margin-top:5px;font-size:13px;}
.badge-rec{
  position:absolute;top:-13px;left:32px;background:var(--accent-500);color:#fff;
  font-size:12px;font-weight:600;height:26px;padding:0 12px;display:inline-flex;align-items:center;border-radius:999px;
}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px;}
.faq-item{border-bottom:1px solid var(--border);}
.faq-q{
  width:100%;background:none;border:none;text-align:left;padding:22px 44px 22px 0;position:relative;
  font-size:17px;font-weight:600;color:var(--text);cursor:pointer;line-height:1.6;
}
.faq-q:hover{color:var(--brand-600);}
.faq-q i{
  position:absolute;right:6px;top:26px;font-size:15px;color:var(--brand-600);
  transition:transform .25s var(--ease);
}
.faq-q[aria-expanded="true"] i{transform:rotate(45deg);}
.faq-a{display:none;padding:0 44px 24px 16px;border-left:3px solid var(--brand-600);margin-left:0;}
.faq-a.open{display:block;}
.faq-a p,.faq-a li{font-size:15px;line-height:1.8;color:var(--text-2);}
.faq-a ul{margin:8px 0 0;}

/* ---------- News ---------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.news-head h2{font-size:34px;font-weight:600;}
.news-head p{color:var(--text-2);margin:10px 0 0;font-size:15px;}
.news-list{display:grid;gap:24px;}
.news-card{
  display:grid;grid-template-columns:280px 1fr;gap:28px;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh-sm);transition:all .25s var(--ease);
}
.news-card:hover{box-shadow:var(--sh-md);transform:translateY(-4px);border-color:var(--brand-100);}
.news-thumb{border-radius:var(--r-img);overflow:hidden;background:var(--brand-50);}
.news-thumb img{width:100%;height:100%;min-height:170px;object-fit:cover;transition:transform .4s var(--ease);}
.news-card:hover .news-thumb img{transform:scale(1.03);}
.news-body{display:flex;flex-direction:column;padding:6px 0;}
.news-body h3{font-size:18px;font-weight:600;line-height:1.5;margin-bottom:10px;}
.news-body h3 a{color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-body h3 a:hover{color:var(--brand-600);}
.news-body p{
  color:var(--text-2);font-size:14px;margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{display:flex;align-items:center;gap:14px;margin-top:auto;font-size:13px;color:var(--text-3);}
.news-meta .chip{background:var(--brand-100);color:var(--brand-700);height:24px;padding:0 10px;border-radius:999px;display:inline-flex;align-items:center;font-size:12px;}
.news-meta time{font-variant-numeric:tabular-nums;}
.news-meta .more{margin-left:auto;color:var(--brand-600);font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.news-card:hover .news-meta .more i{transform:translateX(4px);}
.news-meta .more i{transition:transform .25s var(--ease);}
.empty-state{
  min-height:160px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
  background:#fff;border:1px dashed var(--border);border-radius:var(--r-card);color:var(--text-3);font-size:15px;
}
.empty-state i{font-size:26px;color:var(--text-3);}
.empty-state a{font-weight:600;}

/* ---------- CTA ---------- */
.cta-band{
  background:linear-gradient(135deg,var(--brand-700) 0%,#1B4E78 100%);
  border-radius:var(--r-card);padding:56px;color:#fff;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-80px;bottom:-120px;width:360px;height:360px;border-radius:50%;
  border:1px solid rgba(255,255,255,.1);
}
.cta-band h2{color:#fff;font-size:32px;font-weight:600;margin-bottom:12px;}
.cta-band p{color:rgba(255,255,255,.75);max-width:640px;font-size:15px;}
.cta-form{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:28px;max-width:720px;}
.cta-form .full{grid-column:1 / -1;}
.field label{display:block;font-size:13px;color:rgba(255,255,255,.7);margin-bottom:6px;}
.field input,.field textarea{
  width:100%;height:46px;border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.25);
  background:rgba(255,255,255,.08);color:#fff;padding:0 14px;transition:all .2s var(--ease);
}
.field textarea{height:auto;padding:12px 14px;resize:vertical;min-height:96px;}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.45);}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--accent-500);box-shadow:0 0 0 3px rgba(228,163,60,.22);background:rgba(255,255,255,.12);
}
.form-hint{font-size:13px;color:rgba(255,255,255,.6);margin-top:12px;}

/* ---------- Footer ---------- */
.site-footer{background:var(--brand-700);color:rgba(255,255,255,.72);padding:72px 0 0;margin-top:96px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:48px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.12);}
.footer-brand b{color:#fff;font-size:16px;font-weight:700;}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:18px;}
.footer-col p{font-size:14px;line-height:1.8;}
.footer-col ul{list-style:none;padding:0;}
.footer-col li{margin-bottom:10px;}
.footer-col a{color:rgba(255,255,255,.72);font-size:14px;}
.footer-col a:hover{color:#fff;}
.footer-contact{font-size:14px;}
.footer-contact div{display:flex;gap:10px;margin-bottom:10px;}
.footer-contact i{color:var(--accent-500);margin-top:4px;}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.12);padding:24px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;
}
.footer-bottom a{color:rgba(255,255,255,.72);}

/* ---------- Floating ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  display:flex;flex-direction:column;align-items:flex-end;gap:12px;
  opacity:0;visibility:hidden;transform:translateY(12px);transition:all .3s var(--ease);
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0);}
.float-main{
  height:52px;padding:0 22px;border-radius:999px;background:var(--accent-500);color:#fff;
  display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:15px;box-shadow:var(--sh-lg);
}
.float-main:hover{background:var(--accent-600);color:#fff;}
.float-top{
  width:44px;height:44px;border-radius:50%;background:#fff;color:var(--brand-700);
  display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);box-shadow:var(--sh-md);
}
.float-top:hover{color:var(--brand-600);box-shadow:var(--sh-lg);}

@media (max-width:1199px){
  .hero h1{font-size:42px;}
  .sec-head h2,.news-head h2{font-size:30px;}
}
@media (max-width:991px){
  .nav-chips,.nav-cta{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-inner{height:66px;justify-content:space-between;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero h1{font-size:34px;}
  .hero-visual{order:2;}
  .metrics{grid-template-columns:repeat(2,1fr);gap:24px 0;}
  .metric{border-left:none;padding-left:0;}
  .metric:nth-child(even){border-left:1px solid var(--border);padding-left:20px;}
  .metric b{font-size:32px;}
  .feat-grid{grid-template-columns:1fr;}
  .feat-card.wide{grid-template-columns:1fr;}
  .steps{grid-template-columns:repeat(2,1fr);gap:32px 0;}
  .steps::before{display:none;}
  .step{padding-left:0;}
  .demo-split,.zig{grid-template-columns:1fr;gap:28px;}
  .zig.rev .zig-media{order:0;}
  .proof-bar{grid-template-columns:1fr;gap:24px;padding:32px;}
  .price-grid{grid-template-columns:1fr;}
  .price-card.featured{transform:none;}
  .news-card{grid-template-columns:1fr;}
  .news-thumb img{min-height:200px;height:200px;}
  .cta-band{padding:36px 24px;}
  .cta-band h2{font-size:26px;}
  .cta-form{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .sec{padding:72px 0;}
  .float-cta{left:0;right:0;bottom:0;align-items:stretch;padding:0 0 env(safe-area-inset-bottom,0);}
  .float-main{width:100%;height:56px;border-radius:0;justify-content:center;}
  .float-top{display:none;}
}
@media (max-width:575px){
  .container{padding:0 16px;}
  .sec{padding:56px 0;}
  .hero{padding:44px 0 36px;}
  .hero h1{font-size:30px;}
  .hero-sub{font-size:15px;}
  .hero-actions .btn-x{width:100%;}
  .sec-head h2,.news-head h2{font-size:24px;}
  .feat-card,.price-card{padding:20px;}
  .news-card{padding:16px;}
  .news-head{flex-direction:column;align-items:flex-start;}
  .metrics{grid-template-columns:1fr;gap:20px;}
  .metric:nth-child(even){border-left:none;padding-left:0;}
  .footer-grid{grid-template-columns:1fr;}
  .confirm{grid-template-columns:1fr;}
}

/* roulang page: article */
:root{
  --brand-700:#123A5A;
  --brand-600:#1D5C8C;
  --brand-500:#2A6FA5;
  --brand-100:#E7F0F7;
  --brand-50:#F2F7FB;
  --accent-500:#E4A33C;
  --accent-600:#C9882A;
  --teal-500:#2E9E8F;
  --bg:#F7F9FB;
  --card:#FFFFFF;
  --border:#E2E8EF;
  --text:#1A2836;
  --text-2:#5B6C7D;
  --text-3:#8C99A6;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-chip:999px;
  --radius-img:10px;
  --shadow-sm:0 1px 2px rgba(18,58,90,.06);
  --shadow-md:0 8px 24px rgba(18,58,90,.08);
  --shadow-lg:0 18px 48px rgba(18,58,90,.12);
  --ease:cubic-bezier(.4,0,.2,1);
  --bs-primary:#1D5C8C;
  --bs-primary-rgb:29,92,140;
  --bs-body-font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --bs-body-color:#1A2836;
  --bs-body-bg:#F7F9FB;
  --bs-border-color:#E2E8EF;
  --bs-border-radius:10px;
  --bs-link-color:#1D5C8C;
  --bs-link-hover-color:#2A6FA5;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand-500)}
button{font-family:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;color:var(--text);letter-spacing:-.01em}
p{margin:0 0 16px}
ul,ol{margin:0}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(29,92,140,.18);border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
@media (min-width:1400px){.container{max-width:1240px}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .25s var(--ease);
}
.site-header.scrolled{box-shadow:var(--shadow-md)}
.header-inner{display:flex;align-items:center;gap:24px;height:72px;transition:height .25s var(--ease)}
.site-header.scrolled .header-inner{height:60px}
.brand{display:flex;align-items:center;gap:10px;color:var(--brand-700);font-weight:700;font-size:17px;line-height:1.2;white-space:nowrap}
.brand:hover{color:var(--brand-700)}
.brand-mark{width:34px;height:34px;flex:0 0 auto;border-radius:10px;background:var(--brand-600);display:grid;place-items:center}
.brand-mark svg{width:20px;height:20px;display:block}
.nav-chips{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-chip{
  display:inline-flex;align-items:center;
  padding:8px 14px;min-height:38px;
  border-radius:var(--radius-chip);
  border:1px solid transparent;
  font-size:14.5px;color:var(--text-2);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.nav-chip:hover{background:var(--brand-50);color:var(--brand-700)}
.nav-chip.active{background:var(--brand-100);border-color:#CFE0EE;color:var(--brand-700);font-weight:600}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;margin-left:24px;
  border-radius:var(--radius-btn);
  background:var(--brand-600);color:#fff;font-size:15px;font-weight:600;
  box-shadow:var(--shadow-sm);
  transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-cta:hover{background:var(--brand-500);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.nav-cta:active{transform:translateY(1px)}
.nav-toggle{
  display:none;width:44px;height:44px;margin-left:auto;
  border:1px solid var(--border);border-radius:var(--radius-btn);
  background:#fff;padding:0;place-items:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--brand-700);border-radius:2px;margin:3px auto;transition:.2s var(--ease)}
.nav-toggle.open span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-drawer{display:none;border-top:1px solid var(--border);background:#fff;padding:16px 24px 24px}
.nav-drawer.open{display:block}
.drawer-chips{display:flex;flex-direction:column;gap:8px}
.drawer-chips .nav-chip{justify-content:flex-start;width:100%;min-height:46px;border-color:var(--border)}
.drawer-chips .nav-chip.active{border-color:#CFE0EE}
.drawer-cta{display:flex;width:100%;margin-top:16px;height:46px;align-items:center;justify-content:center;border-radius:var(--radius-btn);background:var(--brand-600);color:#fff;font-weight:600}

/* ============ 按钮 ============ */
.btn-face{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;
  border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary-face{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary-face:hover{background:var(--brand-500);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-primary-face:active{transform:translateY(1px)}
.btn-accent-face{background:var(--accent-500);color:#fff;box-shadow:var(--shadow-sm)}
.btn-accent-face:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-ghost-face{background:#fff;color:var(--brand-700);border-color:var(--border)}
.btn-ghost-face:hover{border-color:var(--brand-600);color:var(--brand-600);transform:translateY(-1px)}
.btn-ghost-face:active{transform:translateY(1px)}

/* ============ 面包屑 ============ */
.crumb-bar{padding:24px 0 0}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-2);margin:0;padding:0;list-style:none}
.crumb li{display:flex;align-items:center;gap:8px}
.crumb li+li::before{content:"/";color:var(--text-3)}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--brand-600)}
.crumb .current{color:var(--text-2);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 文章头 ============ */
.article-hero{padding:20px 0 32px;border-bottom:1px solid var(--border)}
.article-hero .inner{max-width:780px;margin:0 auto}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-bottom:16px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 14px;border-radius:var(--radius-chip);
  background:var(--brand-100);color:var(--brand-700);
  font-size:13px;font-weight:600;line-height:1.6;
}
.chip-teal{background:rgba(46,158,143,.12);color:#1F7C70}
.meta-item{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--text-2);font-variant-numeric:tabular-nums}
.meta-item i{color:var(--text-3)}
.article-hero h1{
  font-size:44px;line-height:1.25;font-weight:700;letter-spacing:-.02em;
  margin:0 0 18px;
}
.article-lead{font-size:16.5px;color:var(--text-2);line-height:1.8;margin:0}

/* ============ 正文 ============ */
.article-main{padding:40px 0 0}
.article-shell{
  max-width:780px;margin:0 auto;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
  padding:48px 48px 40px;
}
.article-body{font-size:16.5px;line-height:1.85;color:var(--text);word-wrap:break-word}
.article-body p{margin:0 0 20px}
.article-body h2{font-size:26px;font-weight:600;line-height:1.4;margin:40px 0 16px;padding-left:14px;position:relative}
.article-body h2::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:2px;background:var(--brand-600)}
.article-body h3{font-size:20px;font-weight:600;line-height:1.5;margin:32px 0 12px}
.article-body h4{font-size:17px;font-weight:600;line-height:1.5;margin:24px 0 10px}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px}
.article-body li{margin-bottom:8px}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;
  border-left:3px solid var(--brand-600);
  background:var(--brand-50);
  border-radius:0 var(--radius-img) var(--radius-img) 0;
  color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius-img);margin:24px auto}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--text-2);text-align:center;margin-top:8px}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;font-variant-numeric:tabular-nums}
.article-body thead th{background:var(--brand-100);color:var(--brand-700);font-weight:600}
.article-body th,.article-body td{border:1px solid var(--border);padding:10px 14px;text-align:left;vertical-align:top}
.article-body tbody tr:nth-child(even){background:#FAFCFE}
.article-body code{
  background:var(--brand-50);border:1px solid var(--border);border-radius:6px;
  padding:2px 6px;font-size:14px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body pre{
  background:#F3F7FA;border:1px solid var(--border);border-radius:8px;
  padding:16px 18px;overflow-x:auto;margin:24px 0;
}
.article-body pre code{background:none;border:none;padding:0;font-size:14px}
.article-body a{color:var(--brand-600);border-bottom:1px solid rgba(29,92,140,.28)}
.article-body a:hover{color:var(--brand-500);border-bottom-color:var(--brand-500)}

.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:40px;padding-top:24px;border-top:1px solid var(--border)}
.tag-row .label{font-size:13px;color:var(--text-3);margin-right:2px}
.tag{
  display:inline-flex;align-items:center;
  padding:6px 14px;border-radius:var(--radius-chip);
  border:1px solid var(--border);background:#fff;
  font-size:13px;color:var(--text-2);
  transition:.2s var(--ease);
}
.tag:hover{border-color:var(--brand-600);color:var(--brand-600);background:var(--brand-50)}

.empty-state{
  min-height:160px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:12px;text-align:center;color:var(--text-2);
  background:var(--brand-50);border:1px dashed var(--border);border-radius:var(--radius-card);
  padding:32px 24px;
}
.empty-state i{font-size:30px;color:var(--text-3)}
.empty-state p{margin:0;font-size:15px}

/* ============ 相关推荐 ============ */
.related{padding:64px 0 0}
.section-head{margin-bottom:28px}
.section-head h2{font-size:32px;font-weight:600;line-height:1.3}
.section-head p{margin:8px 0 0;font-size:15px;color:var(--text-2)}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{
  display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#CFE0EE}
.post-thumb{overflow:hidden;aspect-ratio:3/2;background:var(--brand-50)}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.post-card:hover .post-thumb img{transform:scale(1.03)}
.post-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-body h3{font-size:17px;font-weight:600;line-height:1.5}
.post-card:hover .post-body h3{color:var(--brand-600)}
.post-body p{margin:0;font-size:14px;color:var(--text-2);line-height:1.7}
.post-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:6px;font-size:13px;color:var(--text-3)}
.post-meta .arrow{color:var(--brand-600);transition:transform .2s var(--ease)}
.post-card:hover .post-meta .arrow{transform:translateX(4px)}

/* ============ 返回入口 CTA ============ */
.back-band{padding:64px 0 0}
.back-band .panel{
  background:var(--brand-700);color:#fff;border-radius:16px;
  padding:44px 48px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  position:relative;overflow:hidden;
}
.back-band .panel::after{
  content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;
  border-radius:50%;border:1px solid rgba(255,255,255,.10);
}
.back-band h2{font-size:26px;font-weight:600;color:#fff;line-height:1.35}
.back-band p{margin:10px 0 0;font-size:15px;color:rgba(255,255,255,.72);max-width:560px}
.back-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px;position:relative;z-index:1}
.back-actions .text-link{color:rgba(255,255,255,.82);font-size:15px;border-bottom:1px solid rgba(255,255,255,.35);padding-bottom:2px}
.back-actions .text-link:hover{color:#fff;border-bottom-color:#fff}

/* ============ 页脚 ============ */
.site-footer{background:var(--brand-700);color:rgba(255,255,255,.72);margin-top:96px;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.14)}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col p{font-size:14px;line-height:1.8;margin:0}
.footer-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}
.footer-col ul a{color:rgba(255,255,255,.72);font-size:14px}
.footer-col ul a:hover{color:#fff}
.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact div{display:flex;gap:10px;font-size:14px;line-height:1.7}
.footer-contact i{color:var(--accent-500);margin-top:4px}
.footer-bottom{
  margin-top:48px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:13.5px;color:rgba(255,255,255,.6);
}
.footer-bottom a{color:rgba(255,255,255,.7)}
.footer-bottom a:hover{color:#fff}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:24px;bottom:28px;z-index:70;
  display:flex;flex-direction:column;align-items:flex-end;gap:12px;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease);
}
.float-cta.show{opacity:1;visibility:visible;transform:none}
.float-cta.fade{opacity:0;visibility:hidden;transform:translateY(12px)}
.float-main{
  display:inline-flex;align-items:center;gap:8px;height:52px;padding:0 22px;
  border-radius:var(--radius-chip);background:var(--accent-500);color:#fff;
  font-size:15px;font-weight:600;box-shadow:var(--shadow-md);
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.float-main:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px)}
.float-top{
  width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid var(--border);color:var(--brand-700);
  box-shadow:var(--shadow-sm);display:grid;place-items:center;
  transition:.2s var(--ease);
}
.float-top:hover{border-color:var(--brand-600);color:var(--brand-600);transform:translateY(-1px)}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .nav-chip{padding:7px 11px;font-size:14px}
  .nav-cta{margin-left:16px;padding:0 18px}
}
@media (max-width:991px){
  .header-inner{height:64px;gap:12px}
  .nav-chips,.nav-cta{display:none}
  .nav-toggle{display:grid}
  .site-header.scrolled .header-inner{height:58px}
  .article-hero h1{font-size:36px}
  .article-shell{padding:36px 28px 32px}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .site-footer{margin-top:72px;padding-top:48px}
}
@media (max-width:767px){
  .container{padding-left:18px;padding-right:18px}
  .article-hero{padding:16px 0 24px}
  .article-hero h1{font-size:30px}
  .article-shell{padding:26px 20px 24px;border-radius:12px}
  .article-body{font-size:16px;line-height:1.8}
  .article-body h2{font-size:22px;margin:32px 0 14px}
  .article-body h3{font-size:18px}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;font-size:14px}
  .related-grid{grid-template-columns:1fr}
  .related,.back-band{padding-top:48px}
  .section-head h2{font-size:24px}
  .back-band .panel{padding:32px 24px}
  .back-band h2{font-size:22px}
  .back-actions{width:100%}
  .back-actions .btn-face{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .float-cta{
    left:0;right:0;bottom:0;align-items:stretch;gap:0;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    background:rgba(255,255,255,.96);border-top:1px solid var(--border);
    flex-direction:row;backdrop-filter:blur(8px);
  }
  .float-main{flex:1;height:56px;justify-content:center;border-radius:12px}
  .float-top{width:56px;height:56px;border-radius:12px;flex:0 0 auto}
}
@media (max-width:520px){
  .article-hero h1{font-size:28px}
  .meta-row{gap:10px}
  .chip{font-size:12.5px;padding:4px 12px}
  .post-body{padding:16px}
  .crumb .current{max-width:200px}
}

/* roulang page: category1 */
:root{
  --brand-700:#123A5A;
  --brand-600:#1D5C8C;
  --brand-500:#2A6FA5;
  --brand-100:#E7F0F7;
  --brand-50:#F2F7FB;
  --accent-500:#E4A33C;
  --accent-600:#C9882A;
  --teal-500:#2E9E8F;
  --bg:#F7F9FB;
  --card:#FFFFFF;
  --border:#E2E8EF;
  --ink:#1A2836;
  --ink-2:#5B6C7D;
  --ink-3:#8C99A6;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-sm:0 1px 2px rgba(18,58,90,.06);
  --sh-md:0 8px 24px rgba(18,58,90,.08);
  --sh-lg:0 18px 48px rgba(18,58,90,.12);
  --ease:cubic-bezier(.4,0,.2,1);

  --bs-primary:#1D5C8C;
  --bs-primary-rgb:29,92,140;
  --bs-body-font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --bs-body-color:#1A2836;
  --bs-body-bg:#F7F9FB;
  --bs-border-radius:10px;
  --bs-border-color:#E2E8EF;
  --bs-link-color:#1D5C8C;
  --bs-link-hover-color:#2A6FA5;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand-500)}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:3px solid rgba(29,92,140,.18);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1400px){.container{max-width:1240px}}
@media (min-width:1200px) and (max-width:1399.98px){.container{max-width:1140px}}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:12px 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  transition:all .2s var(--ease);cursor:pointer;white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-brand{background:var(--brand-600);color:#fff}
.btn-brand:hover{background:var(--brand-500);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn-accent{background:var(--accent-500);color:#3B2A08}
.btn-accent:hover{background:var(--accent-600);color:#3B2A08;transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn-outline{background:#fff;border-color:var(--border);color:var(--ink)}
.btn-outline:hover{border-color:var(--brand-600);color:var(--brand-600);transform:translateY(-1px);box-shadow:var(--sh-sm)}
.btn-ghost{background:var(--brand-100);color:var(--brand-700)}
.btn-ghost:hover{background:#D8E7F3;color:var(--brand-700)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-sm{height:38px;padding:9px 16px;font-size:14px}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .25s var(--ease),height .25s var(--ease);
}
.site-header{height:72px;display:flex;align-items:center}
.header-inner{display:flex;align-items:center;gap:24px;width:100%}
body.scrolled .site-header{height:60px;box-shadow:var(--sh-md)}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(140deg,var(--brand-600),var(--brand-700));
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.brand-mark svg{width:20px;height:20px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:17px;font-weight:700;color:var(--brand-700);letter-spacing:-.02em}
.brand-text span{font-size:11px;color:var(--ink-3);letter-spacing:.06em}
.nav-chips{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-left:8px}
.nav-chip{
  display:inline-flex;align-items:center;height:36px;padding:0 14px;border-radius:var(--r-pill);
  font-size:14px;color:var(--ink-2);border:1px solid transparent;
  transition:all .2s var(--ease);position:relative;
}
.nav-chip:hover{color:var(--brand-700);background:var(--brand-50)}
.nav-chip.active{
  background:var(--brand-100);color:var(--brand-700);font-weight:600;
}
.nav-chip.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:-14px;height:2px;background:var(--brand-600);border-radius:2px;
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--border);
  background:#fff;color:var(--brand-700);align-items:center;justify-content:center;font-size:17px;
}
.nav-toggle:hover{border-color:var(--brand-600);color:var(--brand-600)}

.drawer{
  position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--border);
  box-shadow:var(--sh-lg);padding:16px 20px 22px;display:none;
}
.drawer.open{display:block}
.drawer-chip{
  display:block;padding:12px 14px;border-radius:var(--r-btn);font-size:15px;color:var(--ink);
  border:1px solid var(--border);margin-bottom:8px;background:#fff;
}
.drawer-chip.active{background:var(--brand-100);border-color:var(--brand-100);color:var(--brand-700);font-weight:600}
.drawer-chip:hover{border-color:var(--brand-600);color:var(--brand-600)}
.drawer .btn{width:100%;margin-top:8px}

@media (max-width:991.98px){
  .nav-chips{display:none}
  .nav-toggle{display:inline-flex}
  .header-actions .btn{display:none}
}
@media (max-width:575.98px){
  .brand-text b{font-size:15px}
  .brand-text span{display:none}
}

/* ============ 面包屑 ============ */
.crumbs{padding:20px 0 0;font-size:13.5px;color:var(--ink-3)}
.crumbs a{color:var(--ink-2)}
.crumbs a:hover{color:var(--brand-600)}
.crumbs .sep{margin:0 8px;color:var(--ink-3)}
.crumbs .now{color:var(--ink-2)}

/* ============ 页面头部 ============ */
.page-head{padding:24px 0 56px}
.page-head-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.page-head h1{font-size:44px;font-weight:700;line-height:1.25;letter-spacing:-.02em;margin-bottom:18px}
.page-head h1 em{font-style:normal;color:var(--brand-600)}
.lead{font-size:17px;color:var(--ink-2);line-height:1.8;margin-bottom:22px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:var(--brand-100);color:var(--brand-700);font-size:13px;font-weight:500;
}
.tag.teal{background:rgba(46,158,143,.12);color:#1F7568}
.tag.amber{background:rgba(228,163,60,.16);color:#8A5C0C}
.head-media{position:relative}
.head-media img{border-radius:var(--r-card);box-shadow:var(--sh-md);width:100%;object-fit:cover;aspect-ratio:4/3}
.head-media::after{
  content:"";position:absolute;inset:-14px -14px auto auto;width:120px;height:120px;
  border:1.5px solid rgba(29,92,140,.10);border-radius:50%;pointer-events:none;
}
.head-metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:44px;
  border-top:1px solid var(--border);padding-top:26px;
}
.head-metrics div{padding:0 22px;border-left:1px solid var(--border)}
.head-metrics div:first-child{border-left:0;padding-left:0}
.head-metrics b{display:block;font-size:32px;font-weight:700;color:var(--brand-700);font-variant-numeric:tabular-nums;line-height:1.2}
.head-metrics span{font-size:13.5px;color:var(--ink-2)}

@media (max-width:991.98px){
  .page-head-grid{grid-template-columns:1fr;gap:28px}
  .page-head h1{font-size:34px}
  .page-head{padding-bottom:44px}
  .head-media img{aspect-ratio:16/9}
  .head-metrics{grid-template-columns:repeat(2,1fr);gap:20px 0;margin-top:32px}
  .head-metrics div:nth-child(3){border-left:0;padding-left:0}
}
@media (max-width:575.98px){
  .page-head h1{font-size:30px}
  .head-metrics b{font-size:26px}
}

/* ============ 通用区块 ============ */
section{scroll-margin-top:88px}
.section{padding:88px 0}
.section.tight{padding:64px 0}
.section.alt{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--brand-600);margin-bottom:12px;text-transform:none;
}
.sec-kicker::before{content:"";width:20px;height:2px;background:var(--accent-500);border-radius:2px}
.sec-head h2{font-size:34px;font-weight:600;line-height:1.3;margin-bottom:14px}
.sec-head p{font-size:16px;color:var(--ink-2)}
@media (max-width:767.98px){
  .section{padding:56px 0}
  .section.tight{padding:48px 0}
  .sec-head h2{font-size:25px}
  .sec-head{margin-bottom:32px}
}

/* ============ 入口分组 ============ */
.entry-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.entry-group{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--sh-sm);transition:box-shadow .25s var(--ease),transform .25s var(--ease);
}
.entry-group:hover{box-shadow:var(--sh-md);transform:translateY(-2px)}
.group-head{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.group-no{
  width:34px;height:34px;flex:0 0 auto;border-radius:10px;background:var(--brand-50);color:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;font-variant-numeric:tabular-nums;
}
.group-head h3{font-size:19px;font-weight:600}
.group-note{font-size:13.5px;color:var(--ink-3);margin:-8px 0 18px}
.chip-wrap{display:flex;flex-wrap:wrap;gap:10px}
.link-chip{
  display:inline-flex;align-items:center;gap:7px;height:36px;padding:0 14px;border-radius:var(--r-pill);
  background:var(--bg);border:1px solid var(--border);font-size:14px;color:var(--ink);
  transition:all .2s var(--ease);
}
.link-chip i{font-size:11px;color:var(--brand-500)}
.link-chip:hover{border-color:var(--brand-600);color:var(--brand-600);background:#fff;box-shadow:var(--sh-sm);transform:translateY(-1px)}
@media (max-width:767.98px){
  .entry-grid{grid-template-columns:1fr;gap:16px}
  .entry-group{padding:20px}
}

/* ============ 两列卡片列表 ============ */
.card-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.ecard{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--border);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-sm);
  transition:box-shadow .25s var(--ease),transform .25s var(--ease),border-color .25s var(--ease);height:100%;
}
.ecard:hover{box-shadow:var(--sh-md);transform:translateY(-4px);border-color:var(--brand-100)}
.ecard-media{overflow:hidden;aspect-ratio:16/9;background:var(--brand-50)}
.ecard-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.ecard:hover .ecard-media img{transform:scale(1.03)}
.ecard-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.ecard-body h3{font-size:18px;font-weight:600;line-height:1.5}
.ecard-body p{font-size:14.5px;color:var(--ink-2);line-height:1.75}
.ecard-more{
  margin-top:auto;display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600);
}
.ecard-more i{transition:transform .2s var(--ease);font-size:12px}
.ecard:hover .ecard-more i{transform:translateX(4px)}
@media (max-width:767.98px){
  .card-grid-2{grid-template-columns:1fr;gap:18px}
  .ecard-body{padding:18px}
}

/* ============ 核对清单 ============ */
.check-layout{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start}
.check-list li{
  display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--border);font-size:15.5px;color:var(--ink);
}
.check-list li:first-child{padding-top:0}
.check-list li i{
  color:var(--teal-500);font-size:16px;margin-top:4px;flex:0 0 auto;
}
.check-list li span{color:var(--ink-2);display:block;font-size:13.5px;margin-top:4px}
.check-aside{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-sm);
}
.check-aside h3{font-size:20px;font-weight:600;margin-bottom:14px}
.check-aside p{font-size:14.5px;color:var(--ink-2);margin-bottom:18px}
.mini-steps li{
  display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--ink);padding:10px 0;
}
.mini-steps b{
  width:24px;height:24px;border-radius:50%;background:var(--brand-100);color:var(--brand-700);
  font-size:12.5px;display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;font-variant-numeric:tabular-nums;
}
@media (max-width:991.98px){
  .check-layout{grid-template-columns:1fr;gap:28px}
}

/* ============ 流程步骤条 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative}
.steps::before{
  content:"";position:absolute;left:5%;right:5%;top:23px;height:1px;background:var(--border);
}
.step{position:relative;padding-top:0}
.step-dot{
  width:46px;height:46px;border-radius:50%;background:#fff;border:1.5px solid var(--brand-100);
  color:var(--brand-600);display:inline-flex;align-items:center;justify-content:center;
  font-weight:700;font-size:15px;position:relative;z-index:1;font-variant-numeric:tabular-nums;
  transition:all .25s var(--ease);
}
.step:hover .step-dot{border-color:var(--brand-600);background:var(--brand-50)}
.step h3{font-size:18px;font-weight:600;margin:18px 0 8px}
.step p{font-size:14.5px;color:var(--ink-2)}
@media (max-width:991.98px){
  .steps{grid-template-columns:1fr 1fr;gap:28px}
  .steps::before{display:none}
}
@media (max-width:575.98px){
  .steps{grid-template-columns:1fr;gap:22px}
}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--border);position:relative}
.faq-item:first-child{border-top:1px solid var(--border)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:22px 44px 22px 18px;
  font-size:17px;font-weight:600;color:var(--ink);position:relative;
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:24px;bottom:24px;width:3px;border-radius:2px;
  background:var(--brand-600);opacity:0;transition:opacity .25s var(--ease);
}
.faq-item summary::after{
  content:"+";position:absolute;right:12px;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:400;color:var(--brand-600);line-height:1;
  transition:transform .25s var(--ease);
}
.faq-item[open] summary{color:var(--brand-700)}
.faq-item[open] summary::before{opacity:1}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq-item summary:hover{color:var(--brand-600)}
.faq-body{padding:0 44px 24px 18px;font-size:15px;color:var(--ink-2);line-height:1.8}
.faq-body strong{color:var(--ink);font-weight:600}
.faq-body ul{margin-top:10px}
.faq-body ul li{position:relative;padding-left:16px;margin-bottom:6px}
.faq-body ul li::before{content:"";position:absolute;left:0;top:11px;width:5px;height:5px;border-radius:50%;background:var(--brand-500)}
@media (max-width:575.98px){
  .faq-item summary{font-size:16px;padding:18px 36px 18px 14px}
  .faq-body{padding:0 36px 20px 14px}
}

/* ============ CTA 区 ============ */
.cta-band{
  background:linear-gradient(120deg,var(--brand-700),var(--brand-600));
  border-radius:var(--r-card);padding:52px;color:#fff;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;border-radius:50%;
  border:1px solid rgba(255,255,255,.10);
}
.cta-grid{display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:center;position:relative;z-index:1}
.cta-band h2{color:#fff;font-size:31px;font-weight:600;margin-bottom:14px;line-height:1.35}
.cta-band p{color:rgba(255,255,255,.78);font-size:15.5px;margin-bottom:24px}
.cta-band .btn-outline{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.32);color:#fff}
.cta-band .btn-outline:hover{background:rgba(255,255,255,.16);border-color:#fff;color:#fff}
.form-card{background:#fff;border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-lg)}
.form-card h3{font-size:17px;font-weight:600;margin-bottom:16px;color:var(--ink)}
.field{margin-bottom:14px}
.field label{display:block;font-size:13.5px;color:var(--ink-2);margin-bottom:6px}
.field input,.field textarea{
  width:100%;border:1px solid var(--border);border-radius:var(--r-btn);
  padding:0 14px;height:46px;font-size:14.5px;color:var(--ink);background:#fff;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);outline:none;font-family:inherit;
}
.field textarea{height:88px;padding:12px 14px;resize:vertical;line-height:1.6}
.field input:focus,.field textarea:focus{border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(29,92,140,.14)}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-3)}
.form-hint{font-size:12.5px;color:var(--ink-3);margin-top:10px}
@media (max-width:991.98px){
  .cta-band{padding:34px 24px}
  .cta-grid{grid-template-columns:1fr;gap:28px}
  .cta-band h2{font-size:25px}
}

/* ============ 页脚 ============ */
.site-footer{background:var(--brand-700);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand b{color:#fff;font-size:16px;font-weight:700}
.site-footer p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.68)}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{color:rgba(255,255,255,.72);font-size:14px}
.footer-col ul li a:hover{color:#fff}
.footer-contact div{display:flex;gap:10px;font-size:14px;margin-bottom:12px;color:rgba(255,255,255,.72)}
.footer-contact i{color:var(--accent-500);margin-top:5px;font-size:13px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);padding:20px 0;display:flex;
  align-items:center;justify-content:space-between;gap:16px;font-size:13.5px;color:rgba(255,255,255,.6);
}
.footer-bottom a{color:rgba(255,255,255,.8)}
.footer-bottom a:hover{color:#fff}
@media (max-width:991.98px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .site-footer{padding-top:48px}
}
@media (max-width:575.98px){
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* ============ 浮动操作 ============ */
.float-actions{
  position:fixed;right:24px;bottom:28px;z-index:1040;display:flex;flex-direction:column;gap:12px;align-items:flex-end;
  opacity:0;visibility:hidden;transform:translateY(14px);transition:all .3s var(--ease);
}
.float-actions.show{opacity:1;visibility:visible;transform:translateY(0)}
.float-pill{
  display:inline-flex;align-items:center;gap:8px;height:52px;padding:0 22px;border-radius:var(--r-pill);
  background:var(--accent-500);color:#3B2A08;font-size:15px;font-weight:600;box-shadow:var(--sh-md);
}
.float-pill:hover{background:var(--accent-600);color:#3B2A08;transform:translateY(-2px);box-shadow:var(--sh-lg)}
.float-top{
  width:46px;height:46px;border-radius:50%;background:#fff;border:1px solid var(--border);color:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;box-shadow:var(--sh-sm);
}
.float-top:hover{border-color:var(--brand-600);color:var(--brand-600);transform:translateY(-2px)}
@media (max-width:767.98px){
  .float-actions{
    left:0;right:0;bottom:0;align-items:stretch;gap:0;transform:translateY(100%);
    padding:0 0 env(safe-area-inset-bottom);
  }
  .float-actions.show{transform:translateY(0)}
  .float-pill{height:56px;border-radius:0;justify-content:center;box-shadow:none}
  .float-top{display:none}
}

/* roulang page: category2 */
:root{
  --brand-700:#123A5A;
  --brand-600:#1D5C8C;
  --brand-500:#2A6FA5;
  --brand-100:#E7F0F7;
  --brand-50:#F2F7FB;
  --accent-500:#E4A33C;
  --accent-600:#C9882A;
  --teal-500:#2E9E8F;
  --bg:#F7F9FB;
  --surface:#FFFFFF;
  --border:#E2E8EF;
  --text:#1A2836;
  --text-2:#5B6C7D;
  --text-3:#8C99A6;
  --r-card:14px;
  --r-btn:10px;
  --r-chip:999px;
  --sh-sm:0 1px 2px rgba(18,58,90,.06);
  --sh-md:0 8px 24px rgba(18,58,90,.08);
  --sh-lg:0 18px 48px rgba(18,58,90,.12);
  --ease:cubic-bezier(.4,0,.2,1);
  --bs-primary:#1D5C8C;
  --bs-primary-rgb:29,92,140;
  --bs-link-color:#1D5C8C;
  --bs-link-hover-color:#2A6FA5;
  --bs-body-font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --bs-body-color:#1A2836;
  --bs-body-bg:#F7F9FB;
  --bs-border-color:#E2E8EF;
  --bs-border-radius:10px;
  --bs-font-sans-serif:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--brand-500);}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:600;letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(29,92,140,.18);border-radius:8px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1400px){.container{max-width:1240px;}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:12px 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  cursor:pointer;transition:all .2s var(--ease);white-space:nowrap;
}
.btn i{font-size:14px;}
.btn-primary{background:var(--brand-600);color:#fff;border-color:var(--brand-600);}
.btn-primary:hover{background:var(--brand-500);border-color:var(--brand-500);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md);}
.btn-accent{background:var(--accent-500);color:#2A1B02;border-color:var(--accent-500);}
.btn-accent:hover{background:var(--accent-600);border-color:var(--accent-600);color:#2A1B02;transform:translateY(-1px);box-shadow:var(--sh-md);}
.btn-ghost{background:#fff;color:var(--brand-700);border-color:var(--border);}
.btn-ghost:hover{border-color:var(--brand-600);color:var(--brand-600);transform:translateY(-1px);box-shadow:var(--sh-sm);}
.btn:active{transform:translateY(1px);}
.btn:disabled,.btn.disabled{opacity:.5;pointer-events:none;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .25s var(--ease),height .25s var(--ease);
}
.site-header.scrolled{box-shadow:var(--sh-md);}
.header-inner{
  display:flex;align-items:center;gap:24px;
  height:72px;transition:height .25s var(--ease);
}
.site-header.scrolled .header-inner{height:60px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex-shrink:0;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
  display:flex;align-items:center;justify-content:center;box-shadow:var(--sh-sm);
}
.brand-mark svg{width:20px;height:20px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:15px;font-weight:700;color:var(--brand-700);letter-spacing:-.01em;}
.brand-text span{font-size:11px;color:var(--text-3);letter-spacing:.12em;}
.nav-chips{display:flex;align-items:center;gap:6px;margin-left:auto;flex-wrap:nowrap;}
.nav-chip{
  position:relative;padding:8px 14px;border-radius:var(--r-chip);
  font-size:14px;font-weight:500;color:var(--text-2);
  border:1px solid transparent;transition:all .2s var(--ease);
}
.nav-chip:hover{color:var(--brand-700);background:var(--brand-50);}
.nav-chip.active{background:var(--brand-100);color:var(--brand-700);font-weight:600;border-color:rgba(29,92,140,.14);}
.nav-chip.active::after{
  content:"";position:absolute;left:50%;bottom:-1px;transform:translateX(-50%);
  width:20px;height:2px;border-radius:2px;background:var(--brand-600);
}
.header-cta{margin-left:24px;flex-shrink:0;height:42px;padding:11px 20px;font-size:14px;}
.nav-toggle{
  display:none;width:44px;height:44px;margin-left:auto;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-btn);
  color:var(--brand-700);font-size:17px;cursor:pointer;
  align-items:center;justify-content:center;transition:all .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--brand-600);color:var(--brand-600);}
.mobile-drawer{display:none;}

/* ---------- 通用区块 ---------- */
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{font-size:34px;line-height:1.3;font-weight:600;letter-spacing:-.02em;}
.section-head p{margin-top:12px;color:var(--text-2);font-size:16px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;
  font-size:13px;font-weight:600;color:var(--brand-600);
  background:var(--brand-100);padding:5px 12px;border-radius:var(--r-chip);
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent-500);}

/* ---------- 页头 ---------- */
.page-hero{
  padding:56px 0 64px;
  background:
    radial-gradient(900px 320px at 88% -10%,rgba(231,240,247,.9),transparent 70%),
    linear-gradient(180deg,#fff 0%,var(--bg) 100%);
  border-bottom:1px solid var(--border);
}
.breadcrumb-line{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-3);margin-bottom:20px;flex-wrap:wrap;}
.breadcrumb-line a{color:var(--brand-600);}
.breadcrumb-line span.sep{color:#C3CDD8;}
.breadcrumb-line span.current{color:var(--text-2);}
.page-hero h1{
  font-size:clamp(30px,3.6vw,46px);line-height:1.25;font-weight:700;letter-spacing:-.02em;
  max-width:900px;
}
.page-hero .lead{margin-top:20px;max-width:780px;color:var(--text-2);font-size:17px;line-height:1.8;}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 15px;border-radius:var(--r-chip);font-size:13px;font-weight:500;
  background:#fff;border:1px solid var(--border);color:var(--text-2);
  transition:all .2s var(--ease);
}
.chip:hover{border-color:var(--brand-500);color:var(--brand-600);}
.chip i{font-size:12px;color:var(--brand-600);}
.chip.is-teal{background:rgba(46,158,143,.08);border-color:rgba(46,158,143,.24);color:#21756A;}
.chip.is-teal i{color:var(--teal-500);}

/* ---------- 概览两栏 ---------- */
.intro-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
.intro-copy h2{font-size:32px;line-height:1.32;letter-spacing:-.02em;}
.intro-copy p{margin-top:18px;color:var(--text-2);}
.intro-points{margin-top:28px;display:grid;gap:16px;}
.intro-point{display:flex;gap:14px;align-items:flex-start;}
.intro-point i{color:var(--brand-600);font-size:15px;margin-top:5px;}
.intro-point b{font-weight:600;color:var(--brand-700);display:block;font-size:15px;}
.intro-point span{font-size:14px;color:var(--text-2);}
.intro-figure{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-md);border:1px solid var(--border);
}
.intro-figure img{width:100%;height:360px;object-fit:cover;transition:transform .5s var(--ease);}
.intro-figure:hover img{transform:scale(1.03);}
.intro-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:14px 18px;font-size:13px;color:#fff;
  background:linear-gradient(180deg,rgba(18,58,90,0),rgba(18,58,90,.82));
}

/* ---------- 时间轴 ---------- */
.timeline-wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:0;}
.timeline{position:relative;padding-left:40px;}
.timeline::before{
  content:"";position:absolute;left:13px;top:10px;bottom:10px;width:2px;
  background:linear-gradient(180deg,var(--brand-100) 0%,var(--brand-500) 45%,var(--brand-100) 100%);
}
.tl-item{position:relative;padding-bottom:42px;}
.tl-item:last-child{padding-bottom:0;}
.tl-dot{
  position:absolute;left:-40px;top:2px;width:28px;height:28px;border-radius:50%;
  background:var(--brand-600);color:#fff;font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 0 5px var(--brand-50);font-variant-numeric:tabular-nums;
}
.tl-node{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px 26px;box-shadow:var(--sh-sm);transition:all .25s var(--ease);
}
.tl-node:hover{box-shadow:var(--sh-md);border-color:rgba(29,92,140,.18);transform:translateY(-2px);}
.tl-node h3{font-size:20px;font-weight:600;}
.tl-node p{margin-top:12px;font-size:15px;color:var(--text-2);line-height:1.8;}
.tl-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.tl-tag{
  font-size:12px;padding:4px 10px;border-radius:var(--r-chip);
  background:var(--brand-50);color:var(--brand-600);border:1px solid rgba(29,92,140,.12);
  font-variant-numeric:tabular-nums;
}
.tl-tag.warn{background:rgba(228,163,60,.12);color:#96650F;border-color:rgba(228,163,60,.3);}
.tl-note{
  margin-top:16px;padding:12px 16px;border-left:3px solid var(--brand-600);
  background:var(--brand-50);border-radius:0 8px 8px 0;
  font-size:14px;color:var(--text-2);
}
.tl-note b{color:var(--brand-700);font-weight:600;}

/* ---------- 清单网格 ---------- */
.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.check-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--sh-sm);transition:all .25s var(--ease);height:100%;
}
.check-card:hover{box-shadow:var(--sh-md);transform:translateY(-4px);border-color:rgba(29,92,140,.18);}
.check-head{display:flex;align-items:center;gap:12px;}
.check-icon{
  width:40px;height:40px;border-radius:11px;flex-shrink:0;
  background:var(--brand-100);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;font-size:16px;
}
.check-card h3{font-size:18px;font-weight:600;}
.check-list{margin-top:18px;display:grid;gap:10px;}
.check-list li{
  display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--text-2);line-height:1.7;
}
.check-list li i{color:var(--teal-500);font-size:13px;margin-top:5px;}

/* ---------- 指标条 ---------- */
.metric-bar{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  box-shadow:var(--sh-sm);overflow:hidden;margin-top:8px;
}
.metric{padding:28px 24px;border-right:1px solid var(--border);}
.metric:last-child{border-right:none;}
.metric strong{
  display:block;font-size:clamp(28px,3vw,40px);font-weight:700;color:var(--brand-700);
  letter-spacing:-.02em;font-variant-numeric:tabular-nums;line-height:1.1;
}
.metric span{display:block;margin-top:8px;font-size:14px;color:var(--text-2);}

/* ---------- 交替图文 ---------- */
.alt-row{display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center;margin-top:56px;}
.alt-row:first-of-type{margin-top:0;}
.alt-row.reverse .alt-media{order:2;}
.alt-row.reverse .alt-copy{order:1;}
.alt-media{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--border);box-shadow:var(--sh-md);}
.alt-media img{width:100%;height:300px;object-fit:cover;transition:transform .5s var(--ease);}
.alt-media:hover img{transform:scale(1.03);}
.alt-copy .mini-tag{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.04em;
  color:var(--teal-500);background:rgba(46,158,143,.1);
  padding:4px 10px;border-radius:var(--r-chip);margin-bottom:14px;
}
.alt-copy h3{font-size:22px;font-weight:600;line-height:1.4;}
.alt-copy p{margin-top:14px;color:var(--text-2);font-size:15px;}
.alt-copy .text-link{display:inline-flex;align-items:center;gap:6px;margin-top:18px;font-size:15px;font-weight:600;color:var(--brand-600);}
.alt-copy .text-link i{font-size:12px;transition:transform .2s var(--ease);}
.alt-copy .text-link:hover i{transform:translateX(4px);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:840px;}
.faq-item{border-bottom:1px solid var(--border);}
.faq-item:first-child{border-top:1px solid var(--border);}
.faq-q{
  width:100%;background:none;border:none;text-align:left;cursor:pointer;
  display:flex;align-items:flex-start;gap:16px;padding:22px 8px 22px 0;
  font-size:17px;font-weight:600;color:var(--text);line-height:1.6;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand-600);}
.faq-q .sign{
  margin-left:auto;flex-shrink:0;width:22px;height:22px;position:relative;margin-top:4px;
}
.faq-q .sign::before,.faq-q .sign::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-600);
  border-radius:2px;transform:translate(-50%,-50%);transition:transform .25s var(--ease),opacity .25s var(--ease);
}
.faq-q .sign::before{width:14px;height:2px;}
.faq-q .sign::after{width:2px;height:14px;}
.faq-item.open .faq-q{color:var(--brand-600);}
.faq-item.open .sign::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .35s var(--ease);
}
.faq-item.open .faq-a{max-height:520px;}
.faq-a-inner{padding:0 0 24px 0;border-left:0;position:relative;}
.faq-item.open .faq-a-inner{padding-left:16px;}
.faq-item.open .faq-a-inner::before{
  content:"";position:absolute;left:0;top:4px;bottom:24px;width:3px;border-radius:2px;background:var(--brand-600);
}
.faq-a p{font-size:15px;color:var(--text-2);line-height:1.8;}
.faq-a ul{margin-top:10px;display:grid;gap:8px;}
.faq-a li{font-size:15px;color:var(--text-2);line-height:1.8;display:flex;gap:10px;}
.faq-a li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--brand-500);flex-shrink:0;margin-top:11px;}
.faq-a b{color:var(--brand-700);font-weight:600;}

/* ---------- 表单 / CTA ---------- */
.cta-band{
  background:linear-gradient(135deg,var(--brand-700) 0%,#17496F 60%,#1D5C8C 100%);
  border-radius:16px;padding:48px;color:#fff;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;
  border:1px solid rgba(255,255,255,.08);
}
.cta-band::before{
  content:"";position:absolute;right:-20px;bottom:-120px;width:260px;height:260px;border-radius:50%;
  border:1px solid rgba(255,255,255,.06);
}
.cta-grid{display:grid;grid-template-columns:6fr 6fr;gap:48px;position:relative;z-index:2;align-items:start;}
.cta-copy h2{color:#fff;font-size:30px;line-height:1.35;}
.cta-copy p{margin-top:16px;color:rgba(255,255,255,.76);font-size:15px;}
.cta-copy ul{margin-top:22px;display:grid;gap:10px;}
.cta-copy li{display:flex;gap:10px;font-size:14px;color:rgba(255,255,255,.78);}
.cta-copy li i{color:var(--accent-500);margin-top:5px;font-size:13px;}
.form-card{
  background:rgba(255,255,255,.97);border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-lg);
}
.form-card h3{font-size:17px;font-weight:600;color:var(--brand-700);}
.form-card .form-hint{margin-top:6px;font-size:13px;color:var(--text-3);}
.field{margin-top:18px;}
.field label{display:block;font-size:13px;font-weight:600;color:var(--text-2);margin-bottom:8px;}
.field input,.field textarea,.field select{
  width:100%;height:46px;padding:0 14px;border:1px solid var(--border);border-radius:var(--r-btn);
  font-size:14px;color:var(--text);background:#fff;transition:all .2s var(--ease);
}
.field textarea{height:auto;min-height:96px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(29,92,140,.18);
}
.field .err-msg{display:none;margin-top:6px;font-size:12px;color:#B4531B;}
.field.has-error input,.field.has-error textarea{border-color:#D98A3C;}
.field.has-error .err-msg{display:block;}
.form-card .btn{width:100%;margin-top:22px;height:46px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-700);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:96px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand b{color:#fff;font-size:15px;font-weight:700;}
.footer-brand .brand-mark{background:rgba(255,255,255,.12);box-shadow:none;}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:18px;}
.footer-col p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);}
.footer-col ul{display:grid;gap:11px;}
.footer-col ul a{font-size:14px;color:rgba(255,255,255,.72);transition:color .2s var(--ease);}
.footer-col ul a:hover{color:#fff;}
.footer-contact{display:grid;gap:14px;}
.footer-contact div{display:flex;gap:10px;font-size:14px;line-height:1.7;color:rgba(255,255,255,.68);}
.footer-contact i{color:var(--accent-500);margin-top:5px;font-size:13px;flex-shrink:0;}
.footer-bottom{
  margin-top:48px;padding:22px 0;border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.58);
}
.footer-bottom a{color:rgba(255,255,255,.72);}
.footer-bottom a:hover{color:#fff;}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:28px;bottom:32px;z-index:1040;
  display:flex;flex-direction:column;align-items:flex-end;gap:12px;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:all .3s var(--ease);
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0);}
.float-main{
  display:inline-flex;align-items:center;gap:9px;height:52px;padding:0 22px;
  background:var(--accent-500);color:#2A1B02;font-size:15px;font-weight:600;
  border-radius:var(--r-chip);box-shadow:var(--sh-lg);transition:all .2s var(--ease);
}
.float-main:hover{background:var(--accent-600);color:#2A1B02;transform:translateY(-2px);}
.back-top{
  width:48px;height:48px;border-radius:50%;background:#fff;color:var(--brand-600);
  border:1px solid var(--border);display:inline-flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-md);transition:all .2s var(--ease);
}
.back-top:hover{color:var(--brand-700);border-color:var(--brand-600);transform:translateY(-2px);}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .nav-chip{padding:8px 11px;font-size:13px;}
  .header-cta{margin-left:16px;}
}
@media (max-width:992px){
  .section{padding:72px 0;}
  .section-tight{padding:56px 0;}
  .nav-chips{
    position:fixed;left:0;right:0;top:0;bottom:0;
    background:#fff;flex-direction:column;align-items:stretch;gap:6px;
    padding:84px 20px 28px;margin:0;overflow-y:auto;
    transform:translateY(-8px);opacity:0;visibility:hidden;
    transition:all .25s var(--ease);z-index:1050;
  }
  .nav-chips.open{transform:translateY(0);opacity:1;visibility:visible;}
  .nav-chip{font-size:16px;padding:14px 16px;border:1px solid var(--border);border-radius:var(--r-btn);}
  .nav-chip.active::after{display:none;}
  .header-cta{
    display:none;position:fixed;left:20px;right:20px;bottom:28px;z-index:1060;
    margin:0;height:48px;
  }
  .header-cta.drawer-visible{display:inline-flex;}
  .nav-toggle{display:inline-flex;z-index:1061;}
  .intro-grid{grid-template-columns:1fr;gap:32px;}
  .intro-figure img{height:300px;}
  .alt-row{grid-template-columns:1fr;gap:28px;}
  .alt-row.reverse .alt-media{order:1;}
  .alt-row.reverse .alt-copy{order:2;}
  .cta-grid{grid-template-columns:1fr;gap:32px;}
  .metric-bar{grid-template-columns:repeat(2,minmax(0,1fr));}
  .metric:nth-child(2){border-right:none;}
  .metric:nth-child(1),.metric:nth-child(2){border-bottom:1px solid var(--border);}
  .site-footer{margin-top:72px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  .section{padding:56px 0;}
  .page-hero{padding:36px 0 48px;}
  .page-hero .lead{font-size:16px;}
  .section-head h2{font-size:26px;}
  .intro-copy h2{font-size:24px;}
  .check-grid{grid-template-columns:1fr;}
  .metric-bar{grid-template-columns:1fr;}
  .metric{border-right:none;border-bottom:1px solid var(--border);padding:22px 20px;}
  .metric:last-child{border-bottom:none;}
  .cta-band{padding:32px 22px;border-radius:14px;}
  .cta-copy h2{font-size:23px;}
  .timeline{padding-left:32px;}
  .timeline::before{left:9px;width:2px;}
  .tl-dot{left:-32px;width:22px;height:22px;font-size:11px;}
  .tl-node{padding:20px;}
  .tl-node h3{font-size:18px;}
}
@media (max-width:576px){
  .container{padding:0 16px;}
  .page-hero h1{font-size:28px;}
  .section-head h2{font-size:23px;}
  .check-card{padding:18px;}
  .tl-node{padding:16px;}
  .float-cta{right:0;left:0;bottom:0;flex-direction:row;align-items:center;justify-content:center;}
  .float-main{
    flex:1;height:56px;border-radius:0;justify-content:center;
    padding-bottom:env(safe-area-inset-bottom);
  }
  .back-top{display:none;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:992px){
  .float-cta{padding-bottom:0;}
}

/* roulang page: category3 */
:root{
  --brand-700:#123A5A;
  --brand-600:#1D5C8C;
  --brand-500:#2A6FA5;
  --brand-100:#E7F0F7;
  --brand-50:#F2F7FB;
  --accent-500:#E4A33C;
  --accent-600:#C9882A;
  --teal-500:#2E9E8F;
  --bg:#F7F9FB;
  --card:#FFFFFF;
  --border:#E2E8EF;
  --text:#1A2836;
  --text-2:#5B6C7D;
  --text-3:#8C99A6;
  --r-card:14px;
  --r-btn:10px;
  --r-img:10px;
  --sh-sm:0 1px 2px rgba(18,58,90,.06);
  --sh-md:0 8px 24px rgba(18,58,90,.08);
  --sh-lg:0 18px 48px rgba(18,58,90,.12);
  --ease:cubic-bezier(.4,0,.2,1);
  --bs-primary:#1D5C8C;
  --bs-body-font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --bs-border-radius:10px;
  --bs-link-color:#1D5C8C;
  --bs-link-hover-color:#2A6FA5;
  --bs-body-color:#1A2836;
  --bs-body-bg:#F7F9FB;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--brand-500);}
h1,h2,h3,h4{margin:0;color:var(--text);letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1400px){.container{max-width:1240px;}}
.mono{font-variant-numeric:tabular-nums;}

/* 顶栏 */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .25s var(--ease);
}
.site-header.scrolled{box-shadow:var(--sh-md);}
.header-inner{
  display:flex;align-items:center;gap:24px;
  height:72px;
  transition:height .25s var(--ease);
}
.site-header.scrolled .header-inner{height:60px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--brand-700);}
.brand:hover{color:var(--brand-600);}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-700));
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
  box-shadow:var(--sh-sm);
}
.brand-mark svg{width:20px;height:20px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:16px;font-weight:700;letter-spacing:-.02em;}
.brand-text span{font-size:11px;color:var(--text-3);letter-spacing:.08em;}
.nav-chips{display:flex;align-items:center;gap:8px;flex:1 1 auto;overflow-x:auto;scrollbar-width:none;}
.nav-chips::-webkit-scrollbar{display:none;}
.nav-chip{
  flex:0 0 auto;
  display:inline-flex;align-items:center;
  height:38px;padding:0 16px;
  border:1px solid var(--border);border-radius:999px;
  background:transparent;color:var(--text-2);
  font-size:14px;font-weight:500;white-space:nowrap;
  transition:all .2s var(--ease);
}
.nav-chip:hover{color:var(--brand-700);border-color:var(--brand-100);background:var(--brand-50);}
.nav-chip.active{background:var(--brand-100);color:var(--brand-700);border-color:var(--brand-100);font-weight:600;}
.header-cta{flex:0 0 auto;display:flex;align-items:center;gap:12px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:all .2s var(--ease);
  text-align:center;
}
.btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(29,92,140,.18);}
.btn-primary-c{background:var(--brand-600);color:#fff;}
.btn-primary-c:hover{background:var(--brand-500);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md);}
.btn-primary-c:active{transform:translateY(0);}
.btn-accent{background:var(--accent-500);color:#fff;}
.btn-accent:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md);}
.btn-accent:active{transform:translateY(0);}
.btn-ghost{background:#fff;border-color:var(--border);color:var(--text);}
.btn-ghost:hover{border-color:var(--brand-600);color:var(--brand-600);background:#fff;}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.burger{
  display:none;width:44px;height:44px;border:1px solid var(--border);
  background:#fff;border-radius:var(--r-btn);color:var(--brand-700);
  align-items:center;justify-content:center;font-size:18px;
}
.drawer{
  display:none;border-top:1px solid var(--border);background:#fff;padding:16px 20px 22px;
}
.drawer.open{display:block;}
.drawer a.drawer-link{
  display:block;padding:13px 14px;border-radius:10px;
  color:var(--text);font-size:15px;font-weight:500;border:1px solid transparent;
}
.drawer a.drawer-link:hover{background:var(--brand-50);color:var(--brand-700);}
.drawer a.drawer-link.active{background:var(--brand-100);color:var(--brand-700);font-weight:600;}
.drawer .btn{margin-top:12px;}

/* 面包屑 */
.crumb-bar{background:#fff;border-bottom:1px solid var(--border);}
.crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);padding:14px 0;flex-wrap:wrap;}
.crumb a{color:var(--text-2);}
.crumb a:hover{color:var(--brand-600);}
.crumb .sep{color:var(--text-3);}
.crumb .now{color:var(--text-3);}

/* 通用区块 */
.section{padding:96px 0;}
.section-sm{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand-600);
  background:var(--brand-100);border-radius:999px;padding:5px 14px;margin-bottom:16px;
}
.section-head h2{font-size:34px;font-weight:600;line-height:1.3;margin-bottom:14px;}
.section-head p{color:var(--text-2);font-size:16px;}
@media (max-width:768px){
  .section{padding:56px 0;}
  .section-sm{padding:48px 0;}
  .section-head h2{font-size:25px;}
  .section-head{margin-bottom:32px;}
}

/* Hero */
.page-hero{
  position:relative;
  background:linear-gradient(180deg,#fff 0%,var(--brand-50) 100%);
  border-bottom:1px solid var(--border);
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;right:-140px;top:-120px;width:520px;height:520px;
  border-radius:50%;border:1px solid rgba(18,58,90,.05);pointer-events:none;
}
.page-hero::before{
  content:"";position:absolute;right:-40px;top:-40px;width:340px;height:340px;
  border-radius:50%;border:1px solid rgba(18,58,90,.04);pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;padding:72px 0 64px;position:relative;z-index:1;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--brand-100);color:var(--brand-700);
  font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;margin-bottom:20px;
}
.hero-tag i{color:var(--accent-500);}
.page-hero h1{
  font-size:46px;font-weight:700;line-height:1.24;letter-spacing:-.02em;margin-bottom:20px;
}
.page-hero h1 em{font-style:normal;color:var(--brand-600);}
.hero-sub{font-size:17px;color:var(--text-2);max-width:620px;margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px;}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;border-radius:var(--r-card);box-shadow:var(--sh-lg);
  aspect-ratio:4/3;object-fit:cover;
}
.hero-visual .frame{
  position:absolute;inset:-14px -14px auto auto;width:64%;height:70%;
  border:1px solid rgba(18,58,90,.06);border-radius:var(--r-card);z-index:-1;
}
.hero-metrics{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--border);padding:26px 0 40px;position:relative;z-index:1;
}
.metric{padding:0 24px;border-left:1px solid var(--border);}
.metric:first-child{border-left:none;padding-left:0;}
.metric b{display:block;font-size:36px;font-weight:700;color:var(--brand-700);line-height:1.1;font-variant-numeric:tabular-nums;letter-spacing:-.02em;}
.metric span{display:block;font-size:14px;color:var(--text-2);margin-top:6px;}
@media (max-width:991.98px){
  .hero-grid{grid-template-columns:1fr;gap:32px;padding:48px 0 40px;}
  .page-hero h1{font-size:34px;}
  .hero-visual .frame{display:none;}
  .hero-metrics{grid-template-columns:repeat(2,1fr);gap:20px 0;}
  .metric{padding:0 16px;}
  .metric:nth-child(3){border-left:none;padding-left:0;}
  .metric b{font-size:28px;}
}

/* chip 行 */
.chip-row{display:flex;flex-wrap:wrap;gap:10px;padding-top:18px;}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  height:34px;padding:0 14px;border-radius:999px;
  background:#fff;border:1px solid var(--border);
  font-size:13px;color:var(--text-2);
}
.chip i{color:var(--brand-600);font-size:12px;}
.chip.tone{background:var(--brand-100);border-color:var(--brand-100);color:var(--brand-700);font-weight:600;}

/* 对比表 */
.table-wrap{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  box-shadow:var(--sh-sm);overflow:hidden;
}
.spec-table{width:100%;border-collapse:collapse;font-size:15px;}
.spec-table thead th{
  background:var(--brand-100);color:var(--brand-700);
  font-size:14px;font-weight:600;text-align:left;
  padding:16px 20px;white-space:nowrap;
}
.spec-table tbody td{padding:18px 20px;border-top:1px solid var(--border);vertical-align:top;}
.spec-table tbody tr:nth-child(even){background:var(--brand-50);}
.spec-table tbody tr:hover{background:#EFF6FB;}
.spec-table .col-name{font-weight:600;color:var(--text);width:20%;}
.spec-table .col-scope{width:14%;}
.spec-table .col-cond{width:20%;color:var(--text-2);}
.spec-table .col-desc{color:var(--text-2);}
.pill{
  display:inline-block;font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;
  background:var(--brand-100);color:var(--brand-700);white-space:nowrap;
}
.pill.accent{background:#FDF3E2;color:var(--accent-600);}
.pill.teal{background:#E6F6F4;color:var(--teal-500);}
.table-note{font-size:13px;color:var(--text-3);margin-top:14px;}
@media (max-width:767.98px){
  .spec-table thead{display:none;}
  .spec-table,.spec-table tbody,.spec-table tr,.spec-table td{display:block;width:100%;}
  .spec-table tr{
    background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
    margin:0 0 16px;padding:4px 0;overflow:hidden;
  }
  .spec-table tbody tr:nth-child(even){background:#fff;}
  .spec-table tbody td{
    border:none;padding:10px 18px;display:flex;gap:16px;align-items:flex-start;
  }
  .spec-table tbody td::before{
    content:attr(data-label);flex:0 0 78px;font-size:13px;font-weight:600;color:var(--text-3);
  }
  .spec-table tbody td:first-child{
    background:var(--brand-50);padding:14px 18px;font-weight:700;font-size:16px;color:var(--brand-700);
  }
  .spec-table tbody td:first-child::before{display:none;}
  .spec-table .col-name,.spec-table .col-scope,.spec-table .col-cond,.spec-table .col-desc{width:auto;}
}

/* 模块卡片 */
.layout-8-4{display:grid;grid-template-columns:8fr 4fr;gap:24px;}
.module-main{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-sm);transition:all .25s var(--ease);
}
.module-main:hover{box-shadow:var(--sh-lg);transform:translateY(-4px);border-color:var(--brand-100);}
.module-main img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.module-main .body{padding:28px;}
.module-main h3{font-size:22px;font-weight:600;margin-bottom:12px;}
.module-main p{color:var(--text-2);font-size:15px;}
.tick-list{margin-top:18px;display:grid;gap:10px;}
.tick-list li{display:flex;gap:10px;font-size:14px;color:var(--text-2);}
.tick-list i{color:var(--teal-500);margin-top:5px;font-size:12px;}
.side-stack{display:grid;gap:24px;align-content:start;}
.side-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-sm);transition:all .25s var(--ease);
}
.side-card:hover{box-shadow:var(--sh-md);transform:translateY(-3px);border-color:var(--brand-100);}
.side-card .icon{
  width:42px;height:42px;border-radius:12px;background:var(--brand-100);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;font-size:17px;margin-bottom:14px;
}
.side-card h4{font-size:17px;font-weight:600;margin-bottom:8px;}
.side-card p{font-size:14px;color:var(--text-2);}
@media (max-width:991.98px){
  .layout-8-4{grid-template-columns:1fr;}
}

/* 场景交替 */
.scene{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:36px 0;}
.scene + .scene{border-top:1px solid var(--border);}
.scene.reverse .scene-media{order:2;}
.scene-media img{width:100%;border-radius:var(--r-card);box-shadow:var(--sh-md);aspect-ratio:3/2;object-fit:cover;}
.scene .label{
  display:inline-block;font-size:12px;font-weight:600;color:var(--accent-600);
  background:#FDF3E2;border-radius:999px;padding:3px 12px;margin-bottom:14px;
}
.scene h3{font-size:24px;font-weight:600;margin-bottom:14px;}
.scene p{color:var(--text-2);font-size:15px;margin-bottom:14px;}
.scene a.more{font-size:15px;font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.scene a.more i{transition:transform .2s var(--ease);}
.scene a.more:hover i{transform:translateX(4px);}
@media (max-width:768px){
  .scene{grid-template-columns:1fr;gap:24px;padding:28px 0;}
  .scene.reverse .scene-media{order:0;}
  .scene h3{font-size:20px;}
}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step;}
.step{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:26px 22px;box-shadow:var(--sh-sm);position:relative;transition:all .25s var(--ease);
}
.step:hover{box-shadow:var(--sh-md);transform:translateY(-4px);border-color:var(--brand-100);}
.step .no{
  width:38px;height:38px;border-radius:999px;background:var(--brand-600);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;
  margin-bottom:16px;font-variant-numeric:tabular-nums;
}
.step h4{font-size:17px;font-weight:600;margin-bottom:10px;}
.step p{font-size:14px;color:var(--text-2);}
@media (max-width:991.98px){.steps{grid-template-columns:repeat(2,1fr);}}
@media (max-width:520px){.steps{grid-template-columns:1fr;}}

/* FAQ */
.faq-list{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:8px 28px;box-shadow:var(--sh-sm);}
.faq-item{border-bottom:1px solid var(--border);}
.faq-item:last-child{border-bottom:none;}
.faq-q{
  width:100%;background:none;border:none;text-align:left;
  padding:22px 0 22px 0;display:flex;align-items:flex-start;gap:16px;
  font-size:17px;font-weight:600;color:var(--text);line-height:1.5;position:relative;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand-600);}
.faq-q .ind{
  position:absolute;left:-28px;top:20px;bottom:20px;width:3px;border-radius:3px;
  background:var(--brand-600);opacity:0;transition:opacity .2s var(--ease);
}
.faq-q[aria-expanded="true"] .ind{opacity:1;}
.faq-q .pm{
  margin-left:auto;flex:0 0 auto;width:26px;height:26px;border-radius:8px;
  background:var(--brand-50);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;font-size:13px;
  transition:transform .25s var(--ease),background .2s var(--ease);
}
.faq-q[aria-expanded="true"] .pm{transform:rotate(45deg);background:var(--brand-100);}
.faq-a{padding:0 0 22px;font-size:15px;color:var(--text-2);line-height:1.8;max-width:900px;}
.faq-a ul{margin-top:10px;display:grid;gap:8px;}
.faq-a li{padding-left:16px;position:relative;}
.faq-a li::before{content:"";position:absolute;left:0;top:11px;width:5px;height:5px;border-radius:50%;background:var(--brand-600);}
.faq-a b{color:var(--text);}
@media (max-width:768px){
  .faq-list{padding:4px 18px;}
  .faq-q{padding-left:14px;font-size:16px;}
  .faq-q .ind{left:-18px;width:3px;}
}

/* CTA 带 */
.cta-band{background:var(--brand-700);border-radius:0;}
.cta-inner{
  padding:64px 0;display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;
}
.cta-inner h2{color:#fff;font-size:30px;font-weight:600;margin-bottom:12px;}
.cta-inner p{color:rgba(255,255,255,.72);font-size:15px;max-width:680px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}
.cta-actions .btn-ghost{background:transparent;border-color:rgba(255,255,255,.35);color:#fff;}
.cta-actions .btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff;color:#fff;}
@media (max-width:768px){
  .cta-inner{grid-template-columns:1fr;padding:48px 0;gap:24px;}
  .cta-inner h2{font-size:23px;}
  .cta-actions .btn{flex:1 1 100%;}
}

/* 页脚 */
.site-footer{background:var(--brand-700);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:40px;padding-bottom:44px;}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:18px;}
.footer-col p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand b{color:#fff;font-size:16px;font-weight:700;}
.footer-brand .brand-mark{background:rgba(255,255,255,.12);box-shadow:none;}
.footer-col ul{display:grid;gap:11px;}
.footer-col ul a{color:rgba(255,255,255,.72);font-size:14px;}
.footer-col ul a:hover{color:#fff;}
.footer-contact{display:grid;gap:12px;}
.footer-contact div{display:flex;gap:10px;font-size:14px;align-items:flex-start;}
.footer-contact i{color:var(--accent-500);margin-top:5px;font-size:13px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0;display:flex;justify-content:space-between;align-items:center;gap:16px;
  font-size:13px;color:rgba(255,255,255,.6);flex-wrap:wrap;
}
.footer-bottom a{color:rgba(255,255,255,.72);}
.footer-bottom a:hover{color:#fff;}
@media (max-width:991.98px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px;}}
@media (max-width:520px){.footer-grid{grid-template-columns:1fr;}}

/* 浮动 CTA */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  display:flex;flex-direction:column;align-items:flex-end;gap:12px;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:all .28s var(--ease);
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta .pill-btn{
  display:inline-flex;align-items:center;gap:9px;height:52px;padding:0 22px;
  border-radius:999px;background:var(--accent-500);color:#fff;font-size:15px;font-weight:600;
  box-shadow:0 12px 28px rgba(228,163,60,.32);
}
.float-cta .pill-btn:hover{background:var(--accent-600);color:#fff;transform:translateY(-2px);}
.back-top-btn{
  width:46px;height:46px;border-radius:50%;background:#fff;border:1px solid var(--border);
  color:var(--brand-700);display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-md);font-size:15px;
}
.back-top-btn:hover{border-color:var(--brand-600);color:var(--brand-600);}
@media (max-width:768px){
  .float-cta{
    left:0;right:0;bottom:0;align-items:stretch;gap:0;
    padding:0 0 env(safe-area-inset-bottom,0);
  }
  .float-cta .pill-btn{
    border-radius:0;height:56px;justify-content:center;width:100%;
    box-shadow:0 -6px 24px rgba(18,58,90,.16);
  }
  .float-cta .back-top-btn{display:none;}
}

/* 移动端抽屉控制 */
@media (max-width:991.98px){
  .nav-chips,.header-cta .btn{display:none;}
  .burger{display:inline-flex;}
  .header-inner{justify-content:space-between;height:64px;}
  .site-header.scrolled .header-inner{height:58px;}
}
@media (min-width:992px){.drawer{display:none !important;}}

/* roulang page: category4 */
:root{
  --brand-700:#123A5A;
  --brand-600:#1D5C8C;
  --brand-500:#2A6FA5;
  --brand-100:#E7F0F7;
  --brand-50:#F2F7FB;
  --accent-500:#E4A33C;
  --accent-600:#C9882A;
  --teal-500:#2E9E8F;
  --bg:#F7F9FB;
  --card:#FFFFFF;
  --border:#E2E8EF;
  --text:#1A2836;
  --text-2:#5B6C7D;
  --text-3:#8C99A6;
  --radius-card:14px;
  --radius-btn:10px;
  --shadow-sm:0 1px 2px rgba(18,58,90,.06);
  --shadow-md:0 8px 24px rgba(18,58,90,.08);
  --shadow-lg:0 18px 48px rgba(18,58,90,.12);
  --bs-primary:#1D5C8C;
  --bs-body-font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --bs-border-radius:10px;
  --bs-link-color:#1D5C8C;
  --bs-link-hover-color:#2A6FA5;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-500);}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4{margin:0;letter-spacing:-0.01em;color:var(--text);}
p{margin:0;}
.container{max-width:1200px;padding-left:20px;padding-right:20px;margin-left:auto;margin-right:auto;}
@media (min-width:1400px){.container{max-width:1240px;}}
.section{padding:96px 0;}
.section-head{margin-bottom:40px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand-600);
  background:var(--brand-100);border-radius:999px;padding:5px 14px;
  margin-bottom:16px;
}
.eyebrow i{font-size:11px;}
.section-head h2{font-size:clamp(24px,2.6vw,34px);font-weight:600;line-height:1.3;}
.section-lead{color:var(--text-2);margin-top:14px;font-size:15.5px;max-width:760px;}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:#fff;border-bottom:1px solid var(--border);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-md);}
.header-inner{display:flex;align-items:center;gap:20px;height:72px;transition:height .25s ease;}
.site-header.is-scrolled .header-inner{height:60px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--brand-700);}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--brand-600);
  display:grid;place-items:center;flex:0 0 auto;
}
.brand-mark svg{width:20px;height:20px;}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-0.01em;white-space:nowrap;}
.nav-chips{display:flex;align-items:center;gap:6px;flex:1 1 auto;flex-wrap:nowrap;overflow:hidden;}
.nav-chip{
  flex:0 0 auto;padding:7px 14px;border-radius:999px;font-size:14px;
  color:var(--text-2);border:1px solid transparent;font-weight:500;
  transition:all .2s cubic-bezier(.4,0,.2,1);white-space:nowrap;
}
.nav-chip:hover{color:var(--brand-600);background:var(--brand-50);border-color:var(--border);}
.nav-chip.active{background:var(--brand-100);color:var(--brand-700);font-weight:600;border-color:var(--brand-100);}
.nav-chip:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(29,92,140,.18);}
.header-cta{flex:0 0 auto;margin-left:4px;}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:10px;
  border:1px solid var(--border);background:#fff;color:var(--brand-700);
  align-items:center;justify-content:center;font-size:17px;cursor:pointer;
}
.nav-toggle:hover{border-color:var(--brand-600);color:var(--brand-600);}
.mobile-drawer{display:none;border-top:1px solid var(--border);background:#fff;padding:16px 0 24px;}
.mobile-drawer.open{display:block;}
.drawer-nav{display:flex;flex-direction:column;gap:8px;}
.drawer-nav a{
  padding:12px 16px;border-radius:10px;font-size:15px;color:var(--text-2);
  border:1px solid transparent;min-height:44px;display:flex;align-items:center;
}
.drawer-nav a.active{background:var(--brand-100);color:var(--brand-700);font-weight:600;}
.drawer-nav a:hover{background:var(--brand-50);color:var(--brand-600);}
.drawer-cta{margin-top:12px;}
.drawer-cta .btn{width:100%;justify-content:center;}

/* 按钮 */
.btn{
  height:44px;padding:0 24px;border-radius:var(--radius-btn);font-size:15px;
  font-weight:600;display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;cursor:pointer;
  transition:all .2s cubic-bezier(.4,0,.2,1);
}
.btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(29,92,140,.18);}
.btn-brand{background:var(--brand-600);color:#fff;}
.btn-brand:hover{background:var(--brand-500);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md);}
.btn-brand:active{transform:translateY(1px);box-shadow:var(--shadow-sm);}
.btn-accent{background:var(--accent-500);color:#fff;}
.btn-accent:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md);}
.btn-accent:active{transform:translateY(1px);}
.btn-ghost{background:#fff;border-color:var(--border);color:var(--brand-700);}
.btn-ghost:hover{border-color:var(--brand-600);color:var(--brand-600);background:#fff;transform:translateY(-1px);box-shadow:var(--shadow-sm);}
.btn[disabled],.btn.disabled{opacity:.5;pointer-events:none;}

/* 页头横幅 */
.page-hero{
  position:relative;overflow:hidden;
  padding:56px 0 48px;
  background-image:linear-gradient(120deg,rgba(247,249,251,.97),rgba(242,247,251,.88)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--border);
}
.page-hero::after{
  content:"";position:absolute;right:-120px;top:-90px;width:420px;height:420px;
  border-radius:50%;border:1px solid rgba(29,92,140,.06);
  box-shadow:0 0 0 58px rgba(29,92,140,.035);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:1;}
.breadcrumb-nav{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:14px;color:var(--text-3);margin-bottom:20px;}
.breadcrumb-nav a{color:var(--text-2);}
.breadcrumb-nav a:hover{color:var(--brand-600);}
.breadcrumb-nav .current{color:var(--text-2);}
.page-hero h1{
  font-size:clamp(30px,4vw,48px);font-weight:700;line-height:1.25;letter-spacing:-0.02em;
  max-width:900px;color:var(--brand-700);
}
.hero-lead{color:var(--text-2);font-size:16.5px;margin-top:18px;max-width:760px;}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;background:#fff;border:1px solid var(--border);
  font-size:13.5px;color:var(--text-2);transition:all .2s ease;
}
.chip:hover{border-color:var(--brand-600);color:var(--brand-600);}
.chip-active{background:var(--brand-100);border-color:var(--brand-100);color:var(--brand-700);font-weight:600;}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  margin-top:40px;padding-top:26px;border-top:1px solid var(--border);
}
.hero-stat{padding:0 24px;border-left:1px solid var(--border);}
.hero-stat:first-child{border-left:none;padding-left:0;}
.hero-stat b{
  display:block;font-size:36px;font-weight:700;line-height:1.1;color:var(--brand-600);
  font-variant-numeric:tabular-nums;letter-spacing:-0.02em;
}
.hero-stat span{font-size:13.5px;color:var(--text-2);}

/* 路线条 */
.route-bar{
  display:flex;gap:12px;overflow-x:auto;padding:4px 0 20px;margin-bottom:48px;
  border-bottom:1px dashed var(--border);scrollbar-width:thin;
}
.route-node{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--border);border-radius:999px;
  padding:8px 16px;font-size:13.5px;color:var(--text-2);
}
.route-node b{color:var(--brand-600);font-variant-numeric:tabular-nums;font-weight:700;}

/* 图文交替步骤 */
.step-block{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:center;}
.step-block + .step-block{margin-top:64px;padding-top:72px;border-top:1px solid var(--border);}
.step-block.reverse .step-media{order:2;}
.step-block.reverse .step-body{order:1;}
.step-media img{
  width:100%;aspect-ratio:8/5;object-fit:cover;border-radius:14px;
  box-shadow:var(--shadow-md);border:1px solid var(--border);
}
.step-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand-600);
  background:var(--brand-100);border-radius:999px;padding:5px 14px;
}
.step-body h3{font-size:22px;font-weight:600;margin:18px 0 12px;line-height:1.4;}
.step-body p{color:var(--text-2);font-size:15.5px;}
.step-body p + p{margin-top:12px;}
.step-link{
  display:inline-flex;align-items:center;gap:8px;margin-top:18px;
  font-size:14.5px;font-weight:600;color:var(--brand-600);
}
.step-link i{font-size:12px;transition:transform .2s ease;}
.step-link:hover i{transform:translateX(4px);}

/* 核对清单 */
.check-section{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.checklist{
  background:var(--brand-50);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:32px;box-shadow:var(--shadow-sm);height:100%;
}
.checklist h3{font-size:19px;font-weight:600;margin-bottom:8px;}
.checklist .sub{font-size:14px;color:var(--text-2);margin-bottom:22px;}
.checklist ul{list-style:none;display:grid;gap:16px;}
.checklist li{display:flex;gap:12px;font-size:15px;color:var(--text-2);line-height:1.7;}
.checklist li i{color:var(--teal-500);margin-top:5px;flex:0 0 auto;}
.note-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);
  padding:32px;box-shadow:var(--shadow-sm);height:100%;
  display:flex;flex-direction:column;
}
.note-card .note-label{
  display:inline-flex;align-items:center;gap:8px;align-self:flex-start;
  font-size:12.5px;font-weight:600;color:var(--accent-600);
  background:rgba(228,163,60,.14);border-radius:999px;padding:5px 12px;
}
.note-card h3{font-size:19px;font-weight:600;margin:16px 0 12px;}
.note-card p{font-size:15px;color:var(--text-2);}
.note-card p + p{margin-top:12px;}
.note-card .step-link{margin-top:auto;padding-top:20px;}

/* 场景差异 */
.scene-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:48px;align-items:start;}
.scene-media img{
  width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:14px;
  box-shadow:var(--shadow-md);border:1px solid var(--border);
}
.scene-list{list-style:none;}
.scene-list li{padding:24px 0;border-bottom:1px solid var(--border);}
.scene-list li:first-child{padding-top:0;}
.scene-list li:last-child{border-bottom:none;}
.scene-tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:600;color:var(--brand-600);
  background:var(--brand-100);border-radius:999px;padding:4px 12px;margin-bottom:12px;
}
.scene-list h3{font-size:18px;font-weight:600;margin-bottom:8px;}
.scene-list p{font-size:15px;color:var(--text-2);}

/* FAQ */
.faq-section{background:#fff;border-top:1px solid var(--border);}
.faq-wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.6fr);gap:56px;align-items:start;}
.faq-aside h2{font-size:clamp(24px,2.6vw,32px);font-weight:600;line-height:1.3;}
.faq-aside p{color:var(--text-2);font-size:15.5px;margin-top:16px;}
.faq-aside .btn{margin-top:24px;}
.faq-accordion .accordion-item{background:transparent;border:none;border-bottom:1px solid var(--border);}
.faq-accordion .accordion-item:first-of-type{border-top:1px solid var(--border);}
.faq-accordion .accordion-button{
  background:transparent;border:none;box-shadow:none;
  font-size:17px;font-weight:600;color:var(--text);
  padding:24px 44px 24px 16px;position:relative;line-height:1.55;
}
.faq-accordion .accordion-button::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;border-radius:2px;
  background:var(--brand-600);opacity:0;transition:opacity .2s ease;
}
.faq-accordion .accordion-button:not(.collapsed){color:var(--brand-700);}
.faq-accordion .accordion-button:not(.collapsed)::before{opacity:1;}
.faq-accordion .accordion-button::after{
  background-image:none;content:"+";position:absolute;right:8px;top:50%;
  width:auto;height:auto;margin-top:-15px;font-size:24px;font-weight:300;line-height:1;
  color:var(--brand-600);transform:none;transition:transform .2s ease;
}
.faq-accordion .accordion-button:not(.collapsed)::after{transform:rotate(45deg);}
.faq-accordion .accordion-button:focus{box-shadow:0 0 0 3px rgba(29,92,140,.14);z-index:2;}
.faq-accordion .accordion-body{
  padding:0 48px 24px 16px;font-size:15px;line-height:1.8;color:var(--text-2);
}
.faq-accordion .accordion-body ul{list-style:none;display:grid;gap:10px;margin-top:12px;}
.faq-accordion .accordion-body li{display:flex;gap:10px;}
.faq-accordion .accordion-body li i{color:var(--brand-600);margin-top:6px;font-size:10px;}
.faq-accordion .accordion-body strong{color:var(--text);}

/* CTA 与表单 */
.cta-band{
  background:var(--brand-700);border-radius:18px;padding:52px;
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
  box-shadow:var(--shadow-lg);position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;left:-100px;bottom:-140px;width:340px;height:340px;
  border-radius:50%;border:1px solid rgba(255,255,255,.07);
  box-shadow:0 0 0 48px rgba(255,255,255,.035);pointer-events:none;
}
.cta-copy{position:relative;z-index:1;}
.cta-copy h2{color:#fff;font-size:clamp(24px,2.6vw,32px);font-weight:600;line-height:1.35;}
.cta-copy p{color:rgba(255,255,255,.76);font-size:15.5px;margin-top:16px;}
.cta-points{list-style:none;margin-top:24px;display:grid;gap:12px;}
.cta-points li{display:flex;gap:10px;font-size:14.5px;color:rgba(255,255,255,.72);}
.cta-points li i{color:var(--accent-500);margin-top:5px;}
.cta-form{
  position:relative;z-index:1;background:#fff;border-radius:14px;padding:30px;
  box-shadow:var(--shadow-md);
}
.cta-form label{display:block;font-size:13.5px;font-weight:600;color:var(--text);margin-bottom:8px;}
.cta-form .field + .field{margin-top:18px;}
.cta-form input,.cta-form textarea{
  width:100%;border:1px solid var(--border);border-radius:10px;
  padding:0 14px;height:46px;font-size:15px;color:var(--text);background:#fff;
  transition:border-color .2s ease,box-shadow .2s ease;font-family:inherit;
}
.cta-form textarea{height:auto;padding:12px 14px;min-height:104px;resize:vertical;line-height:1.7;}
.cta-form input:focus,.cta-form textarea:focus{
  outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(29,92,140,.16);
}
.cta-form .btn{width:100%;margin-top:24px;height:46px;}
.form-hint{font-size:13px;color:var(--teal-500);margin-top:12px;min-height:20px;}

/* 页脚 */
.site-footer{background:var(--brand-700);color:rgba(255,255,255,.72);padding:72px 0 0;margin-top:96px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:18px;}
.footer-col p{font-size:14px;line-height:1.8;margin-top:16px;}
.footer-brand{display:flex;align-items:center;gap:10px;}
.footer-brand .brand-mark{width:34px;height:34px;border-radius:10px;background:rgba(255,255,255,.12);}
.footer-brand b{color:#fff;font-size:16px;font-weight:700;}
.footer-col ul{list-style:none;display:grid;gap:10px;}
.footer-col ul a{color:rgba(255,255,255,.72);font-size:14px;}
.footer-col ul a:hover{color:#fff;}
.footer-contact{display:grid;gap:14px;}
.footer-contact div{display:flex;gap:10px;font-size:13.5px;line-height:1.7;}
.footer-contact i{color:var(--accent-500);margin-top:5px;flex:0 0 auto;}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;display:flex;justify-content:space-between;align-items:center;
  gap:16px;flex-wrap:wrap;font-size:13.5px;
}
.footer-bottom a{color:rgba(255,255,255,.72);}
.footer-bottom a:hover{color:#fff;}

/* 浮动操作 */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  display:flex;flex-direction:column;align-items:flex-end;gap:12px;
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s;
  padding-bottom:env(safe-area-inset-bottom);
}
.float-cta.show{opacity:1;visibility:visible;transform:none;}
.float-main{
  height:52px;padding:0 22px;border-radius:999px;background:var(--accent-500);color:#fff;
  font-size:15px;font-weight:600;display:inline-flex;align-items:center;gap:8px;
  box-shadow:var(--shadow-md);
}
.float-main:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);}
.float-top{
  width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--border);
  color:var(--brand-600);box-shadow:var(--shadow-sm);cursor:pointer;font-size:15px;
  display:inline-flex;align-items:center;justify-content:center;
}
.float-top:hover{border-color:var(--brand-600);color:var(--brand-500);}

/* 响应式 */
@media (max-width:1199.98px){
  .nav-chip{font-size:13.5px;padding:6px 11px;}
  .brand-text{font-size:16px;}
}
@media (max-width:991.98px){
  .nav-chips,.header-cta{display:none;}
  .nav-toggle{display:inline-flex;}
  .section{padding:72px 0;}
  .step-block{gap:36px;}
  .faq-wrap{grid-template-columns:1fr;gap:36px;}
  .scene-grid{grid-template-columns:1fr;gap:36px;}
  .scene-media img{aspect-ratio:16/9;}
  .cta-band{grid-template-columns:1fr;padding:40px;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .site-footer{margin-top:72px;}
}
@media (max-width:767.98px){
  .section{padding:56px 0;}
  .page-hero{padding:40px 0 36px;}
  .step-block{grid-template-columns:1fr;gap:24px;}
  .step-block.reverse .step-media{order:0;}
  .step-block.reverse .step-body{order:0;}
  .step-block + .step-block{margin-top:48px;padding-top:48px;}
  .step-media img{aspect-ratio:16/10;}
  .hero-stats{grid-template-columns:1fr 1fr;gap:22px 0;}
  .hero-stat{padding:0 18px;}
  .hero-stat:nth-child(3){border-left:none;padding-left:0;}
  .hero-stat b{font-size:30px;}
  .checklist,.note-card,.cta-form{padding:24px;}
  .cta-band{padding:28px;}
}
@media (max-width:575.98px){
  .brand-text{font-size:15px;}
  .page-hero h1{font-size:30px;}
  .hero-lead{font-size:15px;}
  .faq-accordion .accordion-button{font-size:16px;padding:20px 40px 20px 14px;}
  .faq-accordion .accordion-body{padding:0 24px 20px 14px;}
  .footer-grid{grid-template-columns:1fr;}
  .float-cta{right:0;left:0;bottom:0;flex-direction:row;align-items:stretch;gap:0;transform:translateY(100%);}
  .float-cta.show{transform:none;}
  .float-main{flex:1;border-radius:0;height:56px;justify-content:center;box-shadow:none;}
  .float-top{display:none;}
  .btn{height:46px;}
}

/* roulang page: category5 */
:root{
  --brand-700:#123A5A;
  --brand-600:#1D5C8C;
  --brand-500:#2A6FA5;
  --brand-100:#E7F0F7;
  --brand-50:#F2F7FB;
  --accent-500:#E4A33C;
  --accent-600:#C9882A;
  --teal-500:#2E9E8F;
  --bg:#F7F9FB;
  --card:#FFFFFF;
  --border:#E2E8EF;
  --ink:#1A2836;
  --ink-2:#5B6C7D;
  --ink-3:#8C99A6;
  --r-card:14px;
  --r-btn:10px;
  --r-img:10px;
  --r-modal:16px;
  --sh-sm:0 1px 2px rgba(18,58,90,.06);
  --sh-md:0 8px 24px rgba(18,58,90,.08);
  --sh-lg:0 18px 48px rgba(18,58,90,.12);
  --ease:cubic-bezier(.4,0,.2,1);
  --bs-primary:#1D5C8C;
  --bs-body-font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --bs-body-color:#1A2836;
  --bs-body-bg:#F7F9FB;
  --bs-border-radius:10px;
  --bs-link-color:#1D5C8C;
  --bs-link-hover-color:#2A6FA5;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand-600);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand-500)}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.25;letter-spacing:-.01em}
h1{font-size:clamp(30px,4.2vw,48px);font-weight:700;letter-spacing:-.02em}
h2{font-size:clamp(24px,2.6vw,34px)}
h3{font-size:20px}
h4{font-size:17px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(29,92,140,.18);border-radius:6px}
.container{width:100%;max-width:1200px;margin-inline:auto;padding-inline:24px}
@media (min-width:1400px){.container{max-width:1240px}}
.section{padding:96px 0}
.section-sm{padding:64px 0}
.sec-head{max-width:760px;margin-bottom:40px}
.sec-head h2{color:var(--brand-700)}
.sec-head p{margin-top:12px;color:var(--ink-2);font-size:15px}
.num{font-variant-numeric:tabular-nums}

/* ============ 按钮 ============ */
.btn-ka{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-ka-primary{background:var(--brand-600);color:#fff}
.btn-ka-primary:hover{background:var(--brand-500);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn-ka-accent{background:var(--accent-500);color:#fff}
.btn-ka-accent:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-md)}
.btn-ka-ghost{background:#fff;border-color:var(--border);color:var(--ink)}
.btn-ka-ghost:hover{border-color:var(--brand-600);color:var(--brand-600);transform:translateY(-1px)}
.btn-ka:active{transform:translateY(1px);box-shadow:var(--sh-sm)}
.btn-ka[disabled],.btn-ka.is-disabled{opacity:.5;pointer-events:none}
.btn-ka-block{width:100%}
@media (max-width:991.98px){.btn-ka{height:46px}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .25s var(--ease);
}
.site-header.scrolled{box-shadow:var(--sh-md)}
.header-inner{display:flex;align-items:center;gap:24px;height:72px;transition:height .25s var(--ease)}
.site-header.scrolled .header-inner{height:60px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink);font-weight:700}
.logo:hover{color:var(--brand-600)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-sm);
}
.brand-mark svg{width:20px;height:20px}
.logo-text{font-size:17px;letter-spacing:-.01em;line-height:1.2}
.logo-sub{display:block;font-size:12px;font-weight:500;color:var(--ink-3);letter-spacing:.02em}
.nav-chips{display:flex;align-items:center;gap:6px;margin-left:8px;flex:1 1 auto;min-width:0}
.nav-chip{
  position:relative;display:inline-flex;align-items:center;height:36px;padding:0 14px;
  border:1px solid transparent;border-radius:999px;
  font-size:14px;font-weight:500;color:var(--ink-2);
  transition:all .2s var(--ease);white-space:nowrap;
}
.nav-chip:hover{background:var(--brand-50);color:var(--brand-700);border-color:var(--border)}
.nav-chip.active{background:var(--brand-100);color:var(--brand-700);font-weight:600}
.nav-chip.active::after{
  content:"";position:absolute;left:50%;bottom:-13px;transform:translateX(-50%);
  width:22px;height:2px;border-radius:2px;background:var(--brand-600);
}
.header-cta{margin-left:24px}
.menu-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--border);border-radius:10px;
  background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;
}
.menu-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:.2s var(--ease)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-drawer{
  display:none;border-top:1px solid var(--border);background:#fff;
  padding:16px 24px 24px;
}
.mobile-drawer.open{display:block}
.mobile-drawer .drawer-title{font-size:13px;color:var(--ink-3);margin:8px 0 10px}
.mobile-drawer a.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;padding:0 14px;border-radius:10px;color:var(--ink);font-size:15px;
  border:1px solid var(--border);margin-bottom:8px;background:#fff;
}
.mobile-drawer a.drawer-link.active{background:var(--brand-100);color:var(--brand-700);font-weight:600;border-color:var(--brand-100)}
@media (max-width:1199.98px){
  .nav-chip{padding:0 11px;font-size:13.5px}
}
@media (max-width:991.98px){
  .nav-chips,.header-cta{display:none}
  .menu-toggle{display:inline-flex}
  .header-inner{height:64px;justify-content:space-between}
  .site-header.scrolled .header-inner{height:58px}
}

/* ============ 页面头部 ============ */
.page-hero{
  position:relative;overflow:hidden;
  background:
    linear-gradient(100deg,rgba(18,58,90,.92) 0%,rgba(29,92,140,.86) 55%,rgba(29,92,140,.62) 100%),
    url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  color:#fff;
  padding:72px 0 64px;
}
.page-hero::after{
  content:"";position:absolute;right:-120px;top:-140px;width:520px;height:520px;border-radius:50%;
  border:1px solid rgba(255,255,255,.06);pointer-events:none;
}
.page-hero::before{
  content:"";position:absolute;right:-40px;bottom:-260px;width:420px;height:420px;border-radius:50%;
  border:1px solid rgba(255,255,255,.05);pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb-ka{font-size:14px;color:rgba(255,255,255,.7);margin-bottom:18px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.breadcrumb-ka a{color:rgba(255,255,255,.82)}
.breadcrumb-ka a:hover{color:#fff}
.breadcrumb-ka .sep{opacity:.5}
.breadcrumb-ka .current{color:rgba(255,255,255,.68)}
.page-hero h1{max-width:900px;color:#fff}
.page-hero .lead{margin-top:18px;max-width:760px;font-size:16px;color:rgba(255,255,255,.82);line-height:1.8}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{
  display:inline-flex;align-items:center;gap:6px;height:32px;padding:0 14px;border-radius:999px;
  font-size:13px;background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.22);
}
.chip i{font-size:12px;opacity:.9}
.chip-light{background:var(--brand-100);color:var(--brand-700);border-color:transparent}
.chip-teal{background:rgba(46,158,143,.1);color:var(--teal-500);border-color:transparent}

/* ============ 指标条 ============ */
.stats-bar{
  background:#fff;border-bottom:1px solid var(--border);
}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:28px 24px;border-left:1px solid var(--border)}
.stat:first-child{border-left:none}
.stat .v{font-size:clamp(28px,3vw,40px);font-weight:700;color:var(--brand-700);letter-spacing:-.02em;font-variant-numeric:tabular-nums;line-height:1.1}
.stat .v small{font-size:14px;font-weight:600;color:var(--ink-2);margin-left:4px}
.stat .k{margin-top:6px;font-size:13.5px;color:var(--ink-2)}
@media (max-width:767.98px){
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat{padding:20px 16px;border-left:none;border-top:1px solid var(--border)}
  .stat:nth-child(odd){border-right:1px solid var(--border)}
  .stat:nth-child(1),.stat:nth-child(2){border-top:none}
}

/* ============ 问答布局 ============ */
.faq-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:48px;align-items:start}
.toc{position:sticky;top:96px}
.toc-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:20px;box-shadow:var(--sh-sm)}
.toc-h{font-size:13px;font-weight:600;color:var(--ink-3);letter-spacing:.06em;margin-bottom:14px}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:flex;align-items:center;gap:10px;min-height:40px;padding:0 10px;border-radius:8px;
  font-size:14.5px;color:var(--ink-2);border-left:2px solid transparent;
  transition:all .2s var(--ease);
}
.toc-list a .dot{width:6px;height:6px;border-radius:50%;background:var(--border);flex:0 0 auto;transition:background .2s var(--ease)}
.toc-list a:hover{background:var(--brand-50);color:var(--brand-700)}
.toc-list a.active{background:var(--brand-50);color:var(--brand-700);font-weight:600;border-left-color:var(--brand-600)}
.toc-list a.active .dot{background:var(--brand-600)}
.toc-foot{margin-top:18px;padding-top:16px;border-top:1px dashed var(--border);font-size:13px;color:var(--ink-3);line-height:1.7}
@media (max-width:991.98px){
  .faq-layout{grid-template-columns:1fr;gap:24px}
  .toc{position:static;top:auto}
  .toc-card{padding:14px}
  .toc-h{display:none}
  .toc-foot{display:none}
  .toc-list{flex-direction:row;overflow-x:auto;gap:8px;padding-bottom:4px;scrollbar-width:thin}
  .toc-list a{flex:0 0 auto;border:1px solid var(--border);border-left-width:1px;border-radius:999px;padding:0 14px;height:38px;min-height:38px}
  .toc-list a.active{border-color:var(--brand-100)}
}

.faq-group{margin-bottom:38px;scroll-margin-top:96px}
.faq-group:last-child{margin-bottom:0}
.group-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.group-head .idx{
  width:30px;height:30px;border-radius:9px;background:var(--brand-100);color:var(--brand-700);
  display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;flex:0 0 auto;
}
.group-head h3{color:var(--brand-700);font-size:20px}
.group-head .count{margin-left:auto;font-size:13px;color:var(--ink-3)}

.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);margin-bottom:10px;overflow:hidden;transition:box-shadow .2s var(--ease),border-color .2s var(--ease)}
.faq-item:hover{border-color:#D6E0EA;box-shadow:var(--sh-sm)}
.faq-item.open{border-color:#CFE0EE;box-shadow:var(--sh-md)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;text-align:left;
  background:transparent;border:none;padding:20px 22px;cursor:pointer;
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.5;
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.faq-item.open .faq-q{color:var(--brand-700);background:var(--brand-50);border-left:3px solid var(--brand-600);padding-left:19px}
.faq-q:hover{color:var(--brand-600)}
.faq-icon{
  margin-left:auto;width:24px;height:24px;border-radius:50%;background:var(--brand-50);
  position:relative;flex:0 0 auto;transition:background .25s var(--ease),transform .25s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-600);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:10px;height:1.8px}
.faq-icon::after{width:1.8px;height:10px;transition:transform .25s var(--ease),opacity .25s var(--ease)}
.faq-item.open .faq-icon{background:var(--brand-100)}
.faq-item.open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-a{padding:0 22px 22px;font-size:15px;color:var(--ink-2);line-height:1.8}
.faq-a p{margin-bottom:10px}
.faq-a p:last-child{margin-bottom:0}
.faq-a ul{margin:10px 0 0;display:flex;flex-direction:column;gap:8px}
.faq-a ul li{position:relative;padding-left:18px}
.faq-a ul li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;
  background:var(--brand-500);
}
.faq-a strong{color:var(--brand-700);font-weight:600}
.faq-note{
  margin-top:12px;padding:12px 14px;background:var(--brand-50);border-radius:10px;
  font-size:13.5px;color:var(--brand-700);border:1px solid #DCEAF4;
}

/* ============ 排查步骤 ============ */
.steps-wrap{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.steps-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:24px;margin-top:8px}
.step{position:relative;padding-top:22px}
.step::before{
  content:"";position:absolute;top:6px;left:0;right:0;height:1px;background:var(--border);
}
.step::after{
  content:"";position:absolute;top:1px;left:0;width:11px;height:11px;border-radius:50%;
  background:#fff;border:2px solid var(--brand-600);
}
.step .s-num{font-size:13px;font-weight:700;color:var(--accent-500);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.step h3{font-size:17px;margin:6px 0 8px;color:var(--brand-700)}
.step p{font-size:14px;color:var(--ink-2);line-height:1.75}
@media (max-width:991.98px){
  .steps-grid{grid-template-columns:repeat(2,1fr);gap:20px 24px}
  .step{margin-bottom:8px}
}
@media (max-width:575.98px){
  .steps-grid{grid-template-columns:1fr}
  .step{padding-left:20px;padding-top:0}
  .step::before{left:5px;right:auto;top:4px;bottom:0;width:1px;height:auto}
  .step::after{top:2px;left:0}
}

/* ============ 图文块 ============ */
.media-block{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center}
.media-block img{border-radius:var(--r-img);box-shadow:var(--sh-md);width:100%;aspect-ratio:16/10;object-fit:cover}
.media-block .m-body h3{color:var(--brand-700);font-size:22px;margin-bottom:14px}
.media-block .m-body p{color:var(--ink-2);font-size:15.5px;margin-bottom:14px}
.tag{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;font-size:12.5px;font-weight:600;background:var(--brand-100);color:var(--brand-700);margin-bottom:14px}
.plain-list{display:flex;flex-direction:column;gap:10px;margin-top:6px}
.plain-list li{position:relative;padding-left:20px;font-size:15px;color:var(--ink-2)}
.plain-list li::before{content:"";position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:50%;background:var(--brand-100);border:2px solid var(--brand-500)}
@media (max-width:991.98px){
  .media-block{grid-template-columns:1fr;gap:28px}
}

/* ============ 相关分类卡片 ============ */
.rel-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.rel-card{
  display:flex;gap:18px;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-sm);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:var(--brand-100)}
.rel-card .rc-icon{
  width:44px;height:44px;border-radius:12px;background:var(--brand-50);color:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;font-size:18px;flex:0 0 auto;
}
.rel-card h3{font-size:17px;margin-bottom:8px;color:var(--brand-700)}
.rel-card p{font-size:14.5px;color:var(--ink-2);margin-bottom:12px}
.rel-card .rc-link{font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px}
.rel-card:hover .rc-link i{transform:translateX(4px)}
.rel-card .rc-link i{transition:transform .2s var(--ease)}
@media (max-width:767.98px){
  .rel-grid{grid-template-columns:1fr}
  .rel-card{padding:18px}
}

/* ============ CTA + 表单 ============ */
.cta-band{
  background:linear-gradient(115deg,var(--brand-700) 0%,var(--brand-600) 100%);
  color:#fff;border-radius:var(--r-modal);padding:56px;
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  box-shadow:var(--sh-lg);position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;left:-120px;bottom:-180px;width:380px;height:380px;border-radius:50%;
  border:1px solid rgba(255,255,255,.07);
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.4vw,30px)}
.cta-band p{margin-top:14px;color:rgba(255,255,255,.78);font-size:15px;max-width:420px}
.cta-points{margin-top:22px;display:flex;flex-direction:column;gap:10px}
.cta-points li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:rgba(255,255,255,.85)}
.cta-points i{color:var(--accent-500);margin-top:5px;font-size:13px}
.form-card{background:#fff;border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-md);position:relative;z-index:2}
.form-card h3{font-size:17px;color:var(--brand-700);margin-bottom:16px}
.field{margin-bottom:14px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--ink-2);margin-bottom:6px}
.field input,.field textarea{
  width:100%;border:1px solid var(--border);border-radius:var(--r-btn);
  padding:0 14px;height:46px;font-size:14.5px;color:var(--ink);background:#fff;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field textarea{height:96px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(29,92,140,.15)}
.form-hint{font-size:12.5px;color:var(--ink-3);margin-top:10px;line-height:1.7}
.form-ok{display:none;margin-top:12px;font-size:13.5px;color:var(--teal-500);background:rgba(46,158,143,.08);border-radius:10px;padding:10px 12px}
.form-ok.show{display:block}
@media (max-width:991.98px){
  .cta-band{grid-template-columns:1fr;gap:32px;padding:32px 24px;border-radius:var(--r-card)}
  .cta-band p{max-width:none}
}

/* ============ 页脚 ============ */
.site-footer{background:var(--brand-700);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1.2fr;gap:40px}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand b{color:#fff;font-size:16px;font-weight:700;letter-spacing:-.01em}
.footer-col p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72)}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:14px;color:rgba(255,255,255,.72)}
.footer-col ul a:hover{color:#fff}
.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact div{display:flex;gap:10px;align-items:flex-start;font-size:14px;line-height:1.7}
.footer-contact i{color:var(--accent-500);margin-top:4px;font-size:13px}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom span,.footer-bottom a{font-size:13.5px;color:rgba(255,255,255,.6)}
.footer-bottom a:hover{color:#fff}
@media (max-width:991.98px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:575.98px){
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}

/* ============ 浮动按钮 ============ */
.fab-wrap{
  position:fixed;right:24px;bottom:28px;z-index:1040;
  display:flex;flex-direction:column;align-items:flex-end;gap:12px;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .25s var(--ease),transform .25s var(--ease),visibility .25s;
}
.fab-wrap.show{opacity:1;visibility:visible;transform:translateY(0)}
.fab{
  display:inline-flex;align-items:center;gap:8px;height:52px;padding:0 22px;border-radius:999px;
  background:var(--accent-500);color:#fff;font-size:15px;font-weight:600;
  box-shadow:var(--sh-lg);transition:background-color .2s var(--ease),transform .2s var(--ease);
}
.fab:hover{background:var(--accent-600);color:#fff;transform:translateY(-1px)}
.fab-top{
  width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--border);
  color:var(--brand-700);display:inline-flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-md);cursor:pointer;transition:all .2s var(--ease);
}
.fab-top:hover{color:var(--brand-500);transform:translateY(-1px);box-shadow:var(--sh-lg)}
@media (max-width:767.98px){
  .fab-wrap{
    left:0;right:0;bottom:0;align-items:stretch;gap:0;
    padding:0 16px calc(12px + env(safe-area-inset-bottom));
  }
  .fab{width:100%;height:56px;justify-content:center;border-radius:12px}
  .fab-top{display:none}
}
.section-anchor{scroll-margin-top:96px}