/* roulang page: index */
:root{
  --brand:#1A6B8C;
  --brand-dark:#12556F;
  --brand-deep:#0E4459;
  --brand-soft:#E8F2F6;
  --accent:#E2703A;
  --accent-soft:#FBEEE6;
  --accent-deep:#B4501F;
  --green:#2E8B6E;
  --ink:#1B2A32;
  --muted:#566A74;
  --weak:#8A9BA3;
  --line:#E2E8EB;
  --line-hover:#BBD6E0;
  --bg:#F5F7F8;
  --card:#FFFFFF;
  --dark:#10262F;
  --dark-text:#E9F1F4;
  --dark-muted:#A9BFC7;
  --radius-card:16px;
  --radius-img:14px;
  --radius-btn:10px;
  --radius-block:20px;
  --shadow-1:0 1px 2px rgba(16,38,47,.05);
  --shadow-2:0 10px 24px -14px rgba(16,38,47,.18);
  --shadow-3:0 18px 40px -18px rgba(16,38,47,.26);
  --bs-primary:#1A6B8C;
  --bs-primary-rgb:26,107,140;
  --bs-body-color:#1B2A32;
  --bs-body-bg:#F5F7F8;
  --bs-border-color:#E2E8EB;
  --bs-border-radius:10px;
  --bs-link-color:#1A6B8C;
  --bs-link-hover-color:#E2703A;
  --bs-font-sans-serif:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--accent);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:0;line-height:1.3;}
p{margin:0;}
button,input,textarea,select{font-family:inherit;font-size:inherit;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
.narrow{max-width:760px;margin-left:auto;margin-right:auto;}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:#fff;
  border-bottom:1px solid transparent;
  transition:box-shadow .22s ease,border-color .22s ease;
}
.site-header.is-stuck{
  border-bottom-color:var(--line);
  box-shadow:0 6px 18px -14px rgba(16,38,47,.35);
}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  height:72px;
  transition:height .22s ease;
}
.site-header.is-stuck .nav-wrap{height:64px;}
.nav-side{display:flex;align-items:center;gap:4px;flex:1 1 0;}
.nav-side.right{justify-content:flex-end;}
.nav-link-item{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:40px;
  padding:0 14px;
  font-size:15px;
  font-weight:500;
  color:var(--muted);
  border-radius:8px;
  white-space:nowrap;
  transition:color .18s ease,background-color .18s ease;
}
.nav-link-item:hover{color:var(--brand);background:var(--brand-soft);}
.nav-link-item.is-active{color:var(--brand);font-weight:600;}
.nav-link-item.is-active::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--accent);
}
.brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  line-height:1.15;
  padding:0 18px;
  flex:0 0 auto;
  text-align:center;
}
.brand-mark{
  font-size:21px;
  font-weight:700;
  color:var(--brand);
  letter-spacing:0;
}
.brand-mark span{color:var(--accent);}
.brand-sub{
  font-size:11px;
  color:var(--weak);
  font-weight:500;
  letter-spacing:1px;
}
.btn-cta-nav{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:40px;
  padding:0 18px;
  margin-left:10px;
  font-size:15px;
  font-weight:600;
  color:#fff;
  background:var(--brand);
  border:0;
  border-radius:var(--radius-btn);
  box-shadow:var(--shadow-1);
  transition:background-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-cta-nav:hover{color:#fff;background:var(--brand-dark);transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-cta-nav:active{background:var(--brand-deep);transform:translateY(0);box-shadow:var(--shadow-1);}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  background:#fff;
  border:1px solid var(--line);
  border-radius:10px;
  color:var(--brand);
  font-size:18px;
}
.mobile-panel{
  display:none;
  border-top:1px solid var(--line);
  background:#fff;
}
.mobile-panel.open{display:block;}
.mobile-panel a{
  display:flex;
  align-items:center;
  height:48px;
  padding:0 20px;
  font-size:15px;
  color:var(--ink);
  border-bottom:1px solid var(--line);
}
.mobile-panel a.is-active{color:var(--brand);font-weight:600;}
.mobile-panel .panel-cta{
  display:block;
  margin:16px 20px 20px;
  height:48px;
  line-height:48px;
  text-align:center;
  color:#fff;
  background:var(--brand);
  border-radius:var(--radius-btn);
  border-bottom:0;
  font-weight:600;
}
.mobile-panel .panel-cta:hover{background:var(--brand-dark);color:#fff;}

/* ---------- buttons ---------- */
.btn-main,.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  font-size:15px;
  font-weight:600;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-main{color:#fff;background:var(--brand);box-shadow:var(--shadow-1);}
.btn-main:hover{color:#fff;background:var(--brand-dark);transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-main:active{background:var(--brand-deep);transform:translateY(0);box-shadow:var(--shadow-1);}
.btn-ghost{color:var(--brand);background:#fff;border-color:var(--brand);}
.btn-ghost:hover{color:var(--brand-dark);background:var(--brand-soft);border-color:var(--brand-dark);}
.btn-block{width:100%;}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:15px;
  font-weight:600;
  color:var(--brand);
  padding-bottom:2px;
  border-bottom:2px solid transparent;
  transition:border-color .18s ease,color .18s ease;
}
.link-arrow i{transition:transform .18s ease;font-size:12px;}
.link-arrow:hover{color:var(--accent);border-bottom-color:var(--accent);}
.link-arrow:hover i{transform:translateX(3px);}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

/* ---------- section base ---------- */
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.sec-head{margin-bottom:44px;}
.sec-label{
  display:inline-block;
  font-size:14px;
  font-weight:600;
  color:var(--brand);
  background:var(--brand-soft);
  border-radius:999px;
  padding:6px 14px;
  margin-bottom:16px;
}
.sec-title{font-size:clamp(24px,2.6vw,32px);}
.sec-sub{margin-top:14px;color:var(--muted);font-size:16px;max-width:660px;}
.center{text-align:center;}
.center .sec-sub{margin-left:auto;margin-right:auto;}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding:76px 0 88px;
  background:
    repeating-linear-gradient(0deg,rgba(26,107,140,.05) 0 1px,transparent 1px 48px),
    repeating-linear-gradient(90deg,rgba(26,107,140,.05) 0 1px,transparent 1px 48px),
    var(--bg);
  overflow:hidden;
}
.hero-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:56px;
  align-items:center;
}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  font-weight:600;
  color:var(--brand);
  background:#fff;
  border:1px solid var(--line);
  border-radius:999px;
  padding:6px 14px;
  margin-bottom:20px;
}
.hero h1{
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.28;
  margin-bottom:18px;
}
.hero h1 em{font-style:normal;color:var(--brand);}
.hero-lead{
  font-size:19px;
  line-height:1.75;
  color:var(--muted);
  max-width:560px;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.trust-row{display:flex;flex-wrap:wrap;gap:22px;}
.trust-item{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--muted);
}
.trust-item i{color:var(--green);font-size:14px;}
.hero-media{position:relative;}
.hero-media img{
  width:100%;
  border-radius:var(--radius-block);
  box-shadow:var(--shadow-2);
  object-fit:cover;
  aspect-ratio:4/3;
}
.hero-stat{
  position:absolute;
  right:-12px;
  bottom:-18px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-3);
  padding:16px 20px;
  min-width:180px;
}
.hero-stat b{
  display:block;
  font-size:28px;
  font-weight:700;
  color:var(--green);
  line-height:1.2;
}
.hero-stat span{font-size:12px;color:var(--weak);}

/* ---------- pains ---------- */
.pains-grid{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:56px;
  align-items:start;
}
.pain-item{
  display:flex;
  gap:18px;
  padding:20px 0;
  border-bottom:1px dashed var(--line);
}
.pain-item:first-child{padding-top:0;}
.pain-item:last-child{border-bottom:0;padding-bottom:0;}
.pain-icon{
  flex:0 0 auto;
  width:44px;height:44px;
  display:flex;align-items:center;justify-content:center;
  border-radius:12px;
  background:var(--brand-soft);
  color:var(--brand);
  font-size:18px;
}
.pain-item h3{font-size:17px;font-weight:600;margin-bottom:6px;}
.pain-item p{font-size:15px;line-height:1.7;color:var(--muted);}

/* ---------- solution ---------- */
.solution{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  margin-top:48px;
}
.step{
  position:relative;
  padding:26px 22px;
}
.step::after{
  content:"";
  position:absolute;
  right:-12px;
  top:34px;
  bottom:34px;
  width:1px;
  border-left:1px dashed var(--line-hover);
}
.step:last-child::after{display:none;}
.step-num{
  display:block;
  font-size:28px;
  font-weight:700;
  color:var(--accent);
  line-height:1.2;
  margin-bottom:14px;
}
.step h3{font-size:18px;font-weight:600;margin-bottom:10px;}
.step p{font-size:15px;color:var(--muted);line-height:1.7;}

/* ---------- results ---------- */
.results-grid{
  display:grid;
  grid-template-columns:4fr 8fr;
  gap:56px;
  align-items:start;
}
.stat-list{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:28px;}
.stat b{
  display:block;
  font-size:36px;
  font-weight:700;
  color:var(--brand);
  line-height:1.15;
}
.stat span{display:block;font-size:12px;color:var(--weak);margin-top:6px;}
.results-figure img{
  width:100%;
  border-radius:var(--radius-img);
  aspect-ratio:16/9;
  object-fit:cover;
  box-shadow:var(--shadow-1);
}

/* ---------- news ---------- */
.news{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.news-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:36px;
}
.news-card{
  height:100%;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  display:flex;
  flex-direction:column;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-3);
  border-color:var(--line-hover);
}
.badge-soft{
  display:inline-block;
  align-self:flex-start;
  font-size:13px;
  font-weight:600;
  color:var(--brand);
  background:var(--brand-soft);
  border-radius:999px;
  padding:5px 12px;
  margin-bottom:14px;
}
.news-title{
  font-size:17px;
  font-weight:600;
  line-height:1.55;
  margin-bottom:10px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-title a{color:var(--ink);}
.news-title a:hover{color:var(--brand);}
.news-excerpt{
  font-size:15px;
  line-height:1.7;
  color:var(--muted);
  margin-bottom:18px;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-foot{
  margin-top:auto;
  padding-top:16px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.news-time{font-size:13px;color:var(--weak);}
.empty-state{
  min-height:180px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:12px;
  text-align:center;
  color:var(--muted);
  border:1px dashed var(--line);
  border-radius:var(--radius-card);
  padding:32px 20px;
}
.empty-state i{font-size:48px;color:#C3D8E1;}
.empty-state p{font-size:15px;}

/* ---------- testimonials ---------- */
.tst-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.tst-card{
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  border-left:3px solid var(--brand);
  border-radius:var(--radius-card);
  padding:26px;
  box-shadow:var(--shadow-1);
}
.tst-card::before{
  content:"\201C";
  position:absolute;
  top:14px;right:20px;
  font-size:44px;
  line-height:1;
  color:var(--accent);
  opacity:.9;
}
.tst-card p{font-size:15px;line-height:1.8;color:var(--muted);margin-bottom:20px;}
.tst-user{display:flex;align-items:center;gap:12px;}
.tst-avatar{
  width:40px;height:40px;
  border-radius:50%;
  background:var(--brand-soft);
  color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-size:16px;
  font-weight:600;
}
.tst-user b{display:block;font-size:14px;font-weight:600;color:var(--ink);}
.tst-user span{display:block;font-size:12px;color:var(--weak);}

/* ---------- faq ---------- */
.faq{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.accordion-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:12px;
  margin-bottom:12px;
  overflow:hidden;
}
.accordion-button{
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  background:#fff;
  padding:18px 22px;
  box-shadow:none;
}
.accordion-button:not(.collapsed){
  color:var(--brand);
  background:var(--brand-soft);
  box-shadow:none;
}
.accordion-button:focus{box-shadow:0 0 0 2px var(--accent);border-radius:12px;}
.accordion-button::after{
  background-image:none;
  content:"\002B";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  font-size:14px;
  width:auto;height:auto;
  color:var(--brand);
  transform:none;
  transition:transform .2s ease;
}
.accordion-button:not(.collapsed)::after{content:"\2212";transform:none;color:var(--accent);}
.accordion-item:has(.accordion-button:not(.collapsed)){border-left:3px solid var(--accent);}
.accordion-body{
  font-size:15px;
  line-height:1.8;
  color:var(--muted);
  padding:4px 22px 22px;
}

/* ---------- cta ---------- */
.cta{
  background:var(--dark);
  color:var(--dark-text);
  padding:88px 0;
  position:relative;
  background-image:
    repeating-linear-gradient(0deg,rgba(233,241,244,.055) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(90deg,rgba(233,241,244,.055) 0 1px,transparent 1px 44px);
}
.cta h2{color:#fff;font-size:clamp(24px,2.6vw,32px);}
.cta p.lead-text{color:var(--dark-muted);font-size:16px;margin-top:14px;}
.cta-points{margin-top:22px;display:flex;flex-direction:column;gap:10px;}
.cta-points li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:15px;
  color:var(--dark-muted);
}
.cta-points i{color:var(--accent);margin-top:5px;font-size:13px;}
.cta-grid{display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center;}
.form-panel{
  background:#fff;
  border-radius:var(--radius-card);
  padding:28px;
  box-shadow:var(--shadow-3);
}
.form-panel h3{font-size:20px;color:var(--ink);margin-bottom:6px;}
.form-panel .form-hint{font-size:13px;color:var(--weak);margin-bottom:20px;}
.field{margin-bottom:16px;}
.field label{
  display:block;
  font-size:14px;
  font-weight:600;
  color:var(--ink);
  margin-bottom:6px;
}
.field .req{color:var(--accent);margin-left:2px;}
.form-control{
  width:100%;
  padding:12px 14px;
  font-size:15px;
  color:var(--ink);
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.form-control::placeholder{color:#A9B8BF;}
.form-control:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(226,112,58,.28);
}
textarea.form-control{min-height:96px;resize:vertical;}
.form-tip{
  margin-top:14px;
  font-size:14px;
  color:var(--green);
  background:#EDF6F2;
  border:1px solid #CFE7DE;
  border-radius:10px;
  padding:10px 14px;
}

/* ---------- footer ---------- */
.site-footer{
  background:var(--dark);
  color:var(--dark-muted);
  padding:64px 0 0;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:32px;
  padding-bottom:44px;
}
.site-footer .brand-mark{color:#fff;font-size:19px;}
.site-footer .brand-sub{color:var(--dark-muted);letter-spacing:1px;}
.footer-brand p{margin-top:14px;font-size:14px;line-height:1.8;color:var(--dark-muted);max-width:280px;}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600;}
.footer-col li{margin-bottom:10px;}
.footer-col a{color:var(--dark-muted);}
.footer-col a:hover{color:#fff;}
.footer-col p{color:var(--dark-muted);line-height:1.9;}
.footer-bottom{
  border-top:1px solid rgba(233,241,244,.14);
  padding:20px 0;
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  font-size:13px;
  color:#7E96A0;
}
.back-top{
  position:fixed;
  right:24px;
  bottom:24px;
  width:44px;height:44px;
  display:none;
  align-items:center;justify-content:center;
  background:var(--brand);
  color:#fff;
  border:0;
  border-radius:50%;
  box-shadow:var(--shadow-2);
  z-index:1040;
}
.back-top.show{display:flex;}
.back-top:hover{background:var(--brand-dark);color:#fff;}

@media (max-width:1199px){
  .hero-grid{gap:40px;}
  .pains-grid,.results-grid{gap:40px;}
  .cta-grid{gap:32px;}
}
@media (max-width:991px){
  .nav-side,.btn-cta-nav{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-wrap{height:64px;}
  .brand-mark{font-size:19px;}
  .nav-toggle-wrap{display:flex;order:2;}
  .nav-wrap{flex-wrap:nowrap;}
  .section{padding:72px 0;}
  .hero{padding:52px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-media{order:2;}
  .hero-stat{right:12px;bottom:-16px;}
  .pains-grid,.results-grid{grid-template-columns:1fr;gap:32px;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .step::after{display:none;}
  .tst-grid{grid-template-columns:1fr;}
  .stat-list{grid-template-columns:repeat(3,1fr);}
  .cta-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:575px){
  .container{padding:0 16px;}
  .section{padding:52px 0;}
  .hero h1{font-size:29px;}
  .hero-lead{font-size:17px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn-main,.hero-actions .btn-ghost{width:100%;}
  .stat-list{grid-template-columns:1fr 1fr;}
  .steps{grid-template-columns:1fr;}
  .news-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .news-card{padding:20px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .hero-stat{position:static;margin-top:16px;right:auto;bottom:auto;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --brand:#1A6B8C;
  --brand-dark:#12556F;
  --brand-active:#0E4459;
  --brand-soft:#E8F2F6;
  --accent:#E2703A;
  --accent-soft:#FBEEE6;
  --accent-ink:#B4501F;
  --green:#2E8B6E;
  --deep:#10262F;
  --deep-text:#E9F1F4;
  --deep-muted:#A9BFC7;
  --bg:#F5F7F8;
  --card:#FFFFFF;
  --line:#E2E8EB;
  --line-hover:#BBD6E0;
  --ink:#1B2A32;
  --muted:#566A74;
  --weak:#8A9BA3;
  --radius-card:16px;
  --radius-img:14px;
  --radius-btn:10px;
  --radius-badge:999px;
  --shadow-1:0 1px 2px rgba(16,38,47,.05);
  --shadow-2:0 10px 24px -14px rgba(16,38,47,.18);
  --shadow-3:0 18px 40px -18px rgba(16,38,47,.26);
  --bs-primary:#1A6B8C;
  --bs-primary-rgb:26,107,140;
  --bs-body-font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --bs-border-radius:10px;
  --bs-body-color:#1B2A32;
  --bs-body-bg:#F5F7F8;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--bs-body-font-family);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--accent)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:0}
p{margin:0}
button{font-family:inherit}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.num{font-variant-numeric:tabular-nums}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid transparent;
  transition:box-shadow .25s ease,border-color .25s ease,background .25s ease;
}
.site-header.scrolled{border-bottom-color:var(--line);box-shadow:var(--shadow-1)}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;min-height:72px;transition:min-height .25s ease;
}
.site-header.scrolled .nav-inner{min-height:64px}
.brand{display:flex;flex-direction:column;align-items:center;line-height:1.15;flex-shrink:0}
.brand-mark{font-size:22px;font-weight:700;color:var(--ink)}
.brand-mark span{color:var(--brand)}
.brand-sub{font-size:12px;color:var(--muted);letter-spacing:0;margin-top:2px}
.nav-side{display:flex;align-items:center;gap:6px;flex:1 1 0%;min-width:0}
.nav-side.right{justify-content:flex-end}
.nav-link-item{
  position:relative;display:inline-block;
  padding:8px 12px;font-size:15px;color:var(--muted);font-weight:500;
  border-radius:8px;white-space:nowrap;transition:color .2s ease,background .2s ease;
}
.nav-link-item:hover{color:var(--brand);background:var(--brand-soft)}
.nav-link-item.is-active{color:var(--brand);font-weight:600}
.nav-link-item.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--accent);border-radius:2px;
}
.nav-cta{
  margin-left:6px;padding:10px 18px;font-size:15px;font-weight:600;
  border-radius:var(--radius-btn);white-space:nowrap;
}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);
  background:#fff;border-radius:10px;align-items:center;justify-content:center;gap:4px;
  flex-direction:column;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.mobile-panel{
  display:none;background:#fff;border-top:1px solid var(--line);
  padding:8px 20px 20px;
}
.mobile-panel.open{display:block}
.mobile-panel a.m-link{
  display:block;height:48px;line-height:48px;color:var(--muted);font-size:15px;
  border-bottom:1px solid var(--line);
}
.mobile-panel a.m-link.is-active{color:var(--brand);font-weight:600}
.mobile-panel .btn{width:100%;margin-top:16px}

/* ---------- 通用按钮 ---------- */
.btn-brand{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--brand);color:#fff;border:1px solid var(--brand);
  padding:12px 24px;font-size:15px;font-weight:600;border-radius:var(--radius-btn);
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.btn-brand:hover{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-brand:active{background:var(--brand-active);transform:none;box-shadow:var(--shadow-1)}
.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--accent);color:#fff;border:1px solid var(--accent);
  padding:12px 24px;font-size:15px;font-weight:600;border-radius:var(--radius-btn);
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-accent:hover{background:#C85F2C;border-color:#C85F2C;color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-accent:active{transform:none}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:#fff;color:var(--brand);border:1px solid var(--brand);
  padding:12px 24px;font-size:15px;font-weight:600;border-radius:var(--radius-btn);
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-dark);transform:translateY(-1px);box-shadow:var(--shadow-1)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand);
  position:relative;
}
.link-arrow svg{transition:transform .2s ease}
.link-arrow:hover{color:var(--accent)}
.link-arrow:hover svg{transform:translateX(3px)}
.link-arrow::after{
  content:"";position:absolute;left:0;bottom:-3px;width:0;height:2px;background:var(--accent);
  transition:width .2s ease;
}
.link-arrow:hover::after{width:28px}

/* ---------- 徽章 / 标签 ---------- */
.badge-cat{
  display:inline-block;padding:6px 12px;font-size:13px;font-weight:600;
  border-radius:var(--radius-badge);background:var(--brand-soft);color:var(--brand);
}
.badge-soft{
  display:inline-block;padding:6px 12px;font-size:13px;
  border-radius:var(--radius-badge);background:#F1F4F6;color:var(--muted);
}
.badge-new{display:inline-block;padding:6px 12px;font-size:13px;border-radius:var(--radius-badge);background:var(--accent-soft);color:var(--accent-ink)}

/* ---------- 面包屑 ---------- */
.breadcrumb-bar{background:#fff;border-bottom:1px solid var(--line)}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:13px;color:var(--weak);padding:14px 0}
.breadcrumb-list a{color:var(--muted)}
.breadcrumb-list a:hover{color:var(--brand)}
.breadcrumb-list .sep{color:var(--weak)}
.breadcrumb-list .current{color:var(--weak);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头部 ---------- */
.article-head{padding:48px 0 8px;background:#fff;border-bottom:1px solid var(--line)}
.article-head .head-inner{max-width:900px;margin:0 auto}
.article-head h1{
  font-size:clamp(26px,3.4vw,36px);font-weight:700;line-height:1.35;
  margin:18px 0 16px;color:var(--ink);
}
.article-meta{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:13px;color:var(--weak)}
.article-meta span{display:inline-flex;align-items:center;gap:6px}
.article-meta svg{opacity:.75}

/* ---------- 正文区 ---------- */
.article-wrap{padding:40px 0 0}
.article-cover{max-width:900px;margin:0 auto 36px;border-radius:var(--radius-img);overflow:hidden;box-shadow:var(--shadow-2)}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}
.article-body{
  max-width:760px;margin:0 auto;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);padding:36px 40px 40px;box-shadow:var(--shadow-1);
  font-size:16px;line-height:1.9;color:var(--ink);
}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1.1em}
.article-body h2{font-size:26px;font-weight:700;line-height:1.35;margin:40px 0 14px;color:var(--ink)}
.article-body h3{font-size:20px;font-weight:600;line-height:1.4;margin:28px 0 12px;color:var(--ink)}
.article-body h4{font-size:17px;font-weight:600;margin:22px 0 10px}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:0}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:10px}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.68em;width:7px;height:7px;border-radius:2px;background:var(--brand);
}
.article-body ol{counter-reset:ic;padding-left:0}
.article-body ol li{position:relative;padding-left:30px;margin-bottom:10px;counter-increment:ic}
.article-body ol li::before{
  content:counter(ic,decimal-leading-zero);position:absolute;left:0;top:0;
  font-size:14px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums;
}
.article-body blockquote{
  margin:24px 0;padding:20px 22px;background:var(--brand-soft);
  border-left:3px solid var(--accent);border-radius:0 10px 10px 0;color:var(--muted);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(26,107,140,.3)}
.article-body a:hover{color:var(--accent);border-bottom-color:var(--accent)}
.article-body img{border-radius:var(--radius-img);margin:24px auto;box-shadow:var(--shadow-1)}
.article-body figure{margin:24px 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--weak);margin-top:10px}
.article-body .table-wrap{overflow-x:auto;margin:24px 0;border:1px solid var(--line);border-radius:12px}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;min-width:520px}
.article-body table th{
  background:var(--brand-soft);color:var(--brand-dark);font-weight:600;text-align:left;
  padding:12px 14px;border-bottom:1px solid var(--line);
}
.article-body table td{padding:12px 14px;border-bottom:1px solid var(--line);color:var(--muted)}
.article-body table tr:last-child td{border-bottom:0}
.article-body table tbody tr:hover{background:#F8FBFC}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  min-height:180px;text-align:center;color:var(--muted);
}
.empty-state svg{color:#BBD6E0}
.empty-state p{font-size:15px}

/* ---------- 标签与返回 ---------- */
.article-foot{max-width:760px;margin:28px auto 0}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.tag-row .tag-label{font-size:13px;color:var(--weak)}
.back-row{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;padding-top:22px}

/* ---------- 引导条 ---------- */
.cta-soft{padding:64px 0 72px}
.cta-soft .cta-box{
  background:var(--brand-soft);border:1px solid #D6E7EF;border-radius:var(--radius-card);
  padding:32px 36px;display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;
}
.cta-soft h2{font-size:22px;font-weight:700;color:var(--ink);margin-bottom:8px}
.cta-soft p{font-size:15px;color:var(--muted);max-width:640px}

/* ---------- 分类速览 ---------- */
.quick-cats{padding:8px 0 64px}
.quick-cats h2{font-size:22px;margin-bottom:8px}
.quick-cats .sub{font-size:15px;color:var(--muted);margin-bottom:24px}
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cat-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-1);display:flex;flex-direction:column;gap:10px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.cat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-3);border-color:var(--line-hover)}
.cat-card h3{font-size:18px;font-weight:600}
.cat-card p{font-size:15px;line-height:1.7;color:var(--muted)}
.cat-icon{
  width:44px;height:44px;border-radius:12px;background:var(--brand-soft);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--deep);color:var(--deep-text);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1.2fr 1.2fr;gap:32px;padding-bottom:40px}
.footer-brand .brand-mark{font-size:20px;font-weight:700;color:#fff}
.footer-brand .brand-mark span{color:#7FC4DD}
.footer-brand .brand-sub{display:block;font-size:12px;color:var(--deep-muted);margin:4px 0 14px}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--deep-muted);margin-bottom:10px;max-width:340px}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--deep-muted)}
.footer-col a:hover{color:#7FC4DD}
.footer-col p{font-size:14px;color:var(--deep-muted);margin-bottom:10px}
.footer-bottom{
  border-top:1px solid rgba(233,241,244,.14);
  padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
  font-size:13px;color:var(--deep-muted);
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:20px;bottom:24px;width:44px;height:44px;border-radius:50%;
  background:var(--brand);color:#fff;border:0;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-2);opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,background .2s ease;z-index:1040;
}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--brand-dark)}

@media (max-width:1199.98px){
  .nav-link-item{padding:8px 9px;font-size:14px}
  .nav-cta{padding:9px 14px;font-size:14px}
}
@media (max-width:991.98px){
  .nav-side{display:none}
  .nav-toggle{display:flex}
  .nav-inner{min-height:64px}
  .brand{order:2;margin:0 auto}
  .nav-toggle{order:3}
  .site-header .nav-inner>.brand{margin-left:auto}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cat-grid{grid-template-columns:1fr 1fr}
  .article-body{padding:28px 24px 32px}
  .cta-soft{padding:52px 0 60px}
  .cta-soft .cta-box{padding:26px 24px}
}
@media (max-width:767.98px){
  .article-head{padding:32px 0 6px}
  .article-cover{margin-bottom:24px}
  .quick-cats{padding-bottom:52px}
  .cat-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .cta-soft .cta-box{flex-direction:column;align-items:flex-start}
  .back-row{justify-content:flex-start}
}
@media (max-width:575.98px){
  .container{padding:0 16px}
  .article-body{padding:22px 18px 26px;font-size:15.5px}
  .article-body h2{font-size:22px;margin-top:32px}
  .article-body h3{font-size:18px}
  .btn-brand,.btn-ghost,.btn-accent{width:100%}
  .back-row{flex-direction:column;align-items:stretch}
  .to-top{right:14px;bottom:16px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  .cat-card:hover,.btn-brand:hover,.btn-ghost:hover,.btn-accent:hover{transform:none}
}

/* roulang page: category1 */
:root{
  --brand:#1A6B8C;
  --brand-dark:#12556F;
  --brand-active:#0E4459;
  --brand-soft:#E8F2F6;
  --accent:#E2703A;
  --accent-soft:#FBEEE6;
  --accent-deep:#B4501F;
  --green:#2E8B6E;
  --ink:#10262F;
  --ink-soft:#1B2A32;
  --muted:#566A74;
  --weak:#8A9BA3;
  --line:#E2E8EB;
  --line-hover:#BBD6E0;
  --bg:#F5F7F8;
  --card:#ffffff;
  --radius-card:16px;
  --radius-img:14px;
  --radius-btn:10px;
  --radius-banner:20px;
  --shadow-1:0 1px 2px rgba(16,38,47,.05);
  --shadow-2:0 10px 24px -14px rgba(16,38,47,.18);
  --shadow-3:0 18px 40px -18px rgba(16,38,47,.26);

  --bs-primary:#1A6B8C;
  --bs-primary-rgb:26,107,140;
  --bs-body-font-family: system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --bs-body-color:#1B2A32;
  --bs-body-bg:#F5F7F8;
  --bs-border-color:#E2E8EB;
  --bs-border-radius:10px;
  --bs-link-color:#1A6B8C;
  --bs-link-hover-color:#E2703A;
  --bs-font-sans-serif: system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",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(--ink-soft);
  font-family:var(--bs-body-font-family);
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--accent)}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding-left:1.1em}
button{font-family:inherit}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-9999px;top:0;background:#fff;color:var(--brand);padding:10px 16px;border-radius:0 0 10px 0;z-index:2000}
.skip-link:focus{left:0}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,.accordion-button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:8px}

/* ---------- 按钮 ---------- */
.btn{--bs-btn-focus-box-shadow:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--radius-btn);border:1px solid transparent;font-size:15px;font-weight:600;line-height:1.2;padding:12px 24px;transition:transform .18s ease,background-color .18s ease,box-shadow .18s ease,color .18s ease,border-color .18s ease}
.btn-brand{background:var(--brand);color:#fff;box-shadow:var(--shadow-1)}
.btn-brand:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-brand:active{background:var(--brand-active);transform:none;box-shadow:var(--shadow-1)}
.btn-outline-brand{background:#fff;color:var(--brand);border-color:var(--brand)}
.btn-outline-brand:hover{background:var(--brand-soft);color:var(--brand-dark);border-color:var(--brand-dark);transform:translateY(-1px)}
.btn-outline-brand:active{transform:none;background:#DCEAF1}
.btn-sm{padding:9px 18px;font-size:14px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px;color:var(--brand);position:relative}
.link-arrow svg{transition:transform .18s ease}
.link-arrow::after{content:"";position:absolute;left:0;bottom:-3px;height:2px;width:0;background:var(--accent);transition:width .2s ease}
.link-arrow:hover{color:var(--brand-dark)}
.link-arrow:hover svg{transform:translateX(3px)}
.link-arrow:hover::after{width:100%}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:1030;background:#fff;border-bottom:1px solid transparent;transition:box-shadow .2s ease,border-color .2s ease}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--shadow-1)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:72px;transition:height .2s ease}
.site-header.is-scrolled .header-inner{height:64px}
.nav-side{display:flex;align-items:center;gap:2px;flex:1 1 0%}
.nav-side.right{justify-content:flex-end}
.nav-link-item{position:relative;display:inline-flex;align-items:center;height:40px;padding:0 12px;border-radius:8px;font-size:15px;color:var(--muted);white-space:nowrap;transition:color .18s ease,background-color .18s ease}
.nav-link-item:hover{color:var(--brand);background:var(--brand-soft)}
.nav-link-item.is-active{color:var(--brand);font-weight:600}
.nav-link-item.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;border-radius:2px;background:var(--accent)}
.nav-cta{margin-left:10px;padding:10px 18px;font-size:14px}
.brand{display:flex;flex-direction:column;align-items:center;flex:0 0 auto;text-decoration:none;line-height:1.15;padding:0 8px}
.brand-mark{font-size:21px;font-weight:700;color:var(--brand);letter-spacing:0}
.brand-mark span{color:var(--accent)}
.brand-sub{font-size:11.5px;color:var(--weak);margin-top:2px;white-space:nowrap}
.nav-spacer{display:none;width:44px}
.nav-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;background:#fff;border:1px solid var(--line);border-radius:10px;cursor:pointer;color:var(--brand);padding:0}
.nav-toggle:hover{border-color:var(--line-hover);background:var(--brand-soft)}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-panel{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-top:1px solid var(--line);box-shadow:var(--shadow-2);padding:6px 0 20px}
.mobile-panel.is-open{display:block}
.mobile-panel a.m-panel-link{display:flex;align-items:center;height:48px;padding:0 20px;border-bottom:1px solid var(--line);font-size:15px;color:var(--ink-soft)}
.mobile-panel a.m-panel-link:hover{background:var(--brand-soft);color:var(--brand)}
.mobile-panel a.m-panel-link.is-active{color:var(--brand);font-weight:600;border-left:3px solid var(--accent);padding-left:17px}
.mobile-panel .m-panel-cta{margin:16px 20px 0;display:flex;width:calc(100% - 40px)}
@media (max-width:991.98px){
  .nav-side{display:none}
  .nav-toggle{display:inline-flex}
  .nav-spacer{display:block}
  .header-inner{justify-content:space-between}
}

/* ---------- 页面头部横幅 ---------- */
.page-hero{position:relative;isolation:isolate;padding:64px 0 56px;min-height:300px;display:flex;align-items:center;background-color:var(--ink);background-image:url(/assets/images/backpic/back-2.png);background-size:cover;background-position:center;color:#fff}
.page-hero::before{content:"";position:absolute;inset:0;background:rgba(16,38,47,.72);z-index:-1}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(233,241,244,.78);margin-bottom:18px;flex-wrap:wrap}
.crumb a{color:rgba(233,241,244,.78)}
.crumb a:hover{color:#fff}
.crumb .sep{opacity:.6}
.crumb .current{color:rgba(233,241,244,.62)}
.hero-tag{display:inline-flex;align-items:center;gap:8px;font-size:14px;padding:6px 14px;border-radius:999px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);color:#fff;margin-bottom:16px}
.page-hero h1{font-size:clamp(27px,3.6vw,40px);font-weight:700;line-height:1.3;max-width:820px}
.page-hero .hero-lead{margin-top:14px;font-size:17px;line-height:1.75;color:rgba(233,241,244,.88);max-width:700px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero-meta span{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:rgba(233,241,244,.9);background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);border-radius:999px;padding:5px 12px}
.hero-meta svg{width:14px;height:14px;color:#8FD3C0}

/* ---------- 区块通用 ---------- */
.section{padding:72px 0}
.section-soft{background:var(--brand-soft)}
.section-plain{background:#fff}
.section-head{max-width:760px;margin-bottom:32px}
.section-head h2{font-size:clamp(23px,2.4vw,31px);font-weight:700;line-height:1.35}
.section-head p{margin-top:12px;font-size:16px;color:var(--muted)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--brand);margin-bottom:10px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px}

/* ---------- 目录 ---------- */
.toc-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:20px 18px}
.toc-card h2{font-size:15px;font-weight:600;color:var(--weak);padding:0 12px 12px;border-bottom:1px solid var(--line);margin-bottom:10px}
.toc-list{list-style:none;margin:0;padding:0}
.toc-list li{margin:2px 0}
.toc-list a{display:block;padding:9px 12px;font-size:14.5px;color:var(--muted);border-left:2px solid transparent;border-radius:0 8px 8px 0;transition:all .18s ease}
.toc-list a:hover{color:var(--brand);background:var(--brand-soft)}
.toc-list a.is-current{color:var(--brand);font-weight:600;border-left-color:var(--accent);background:var(--brand-soft)}
.toc-hint{margin-top:14px;padding:12px;border-radius:10px;background:var(--accent-soft);font-size:13px;line-height:1.7;color:var(--accent-deep)}
@media (min-width:992px){.toc-sticky{position:sticky;top:96px}}

/* ---------- 正文文档 ---------- */
.doc-body{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:8px 32px 32px}
.doc-section{padding:32px 0;border-bottom:1px dashed var(--line);scroll-margin-top:100px}
.doc-section:last-child{border-bottom:0;padding-bottom:8px}
.doc-section h2{font-size:clamp(21px,2.1vw,27px);font-weight:700;line-height:1.35;display:flex;align-items:baseline;gap:12px}
.doc-section h2 .num{font-size:22px;font-weight:700;color:var(--accent);flex:0 0 auto}
.doc-section p{margin-top:14px;font-size:16px;line-height:1.85;color:var(--ink-soft);max-width:760px}
.doc-section p.note{font-size:15px;color:var(--muted)}

.point-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:22px}
.point-card{background:#FAFCFD;border:1px solid var(--line);border-radius:12px;padding:18px 20px;transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease}
.point-card:hover{border-color:var(--line-hover);box-shadow:var(--shadow-2);transform:translateY(-2px)}
.point-card h3{font-size:16.5px;font-weight:600;color:var(--ink-soft);display:flex;align-items:center;gap:8px}
.point-card h3::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--brand);flex:0 0 auto}
.point-card p{margin-top:8px;font-size:15px;line-height:1.7;color:var(--muted)}

.step-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:22px}
.step-item{position:relative;background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px 20px 20px 22px;border-left:3px solid var(--accent)}
.step-item .step-num{font-size:20px;font-weight:700;color:var(--accent)}
.step-item h3{font-size:17px;font-weight:600;margin-top:6px}
.step-item p{margin-top:8px;font-size:15px;line-height:1.7;color:var(--muted)}

.figure{margin:24px 0 0}
.figure img{border-radius:var(--radius-img);border:1px solid var(--line);width:100%}
.figure figcaption{margin-top:10px;font-size:13px;color:var(--weak);text-align:center}

.tip-inline{display:flex;gap:12px;align-items:flex-start;margin-top:22px;padding:16px 18px;border-radius:12px;background:var(--brand-soft);border:1px solid #CFE4EC}
.tip-inline svg{width:20px;height:20px;color:var(--brand);flex:0 0 20px;margin-top:3px}
.tip-inline p{margin:0;font-size:15px;line-height:1.75;color:var(--brand-dark)}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;align-items:start}
.faq-col{display:grid;gap:12px}
.accordion-item{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.accordion-item:hover{border-color:var(--line-hover)}
.accordion-button{width:100%;display:flex;align-items:center;gap:12px;padding:16px 18px;font-size:17px;font-weight:600;color:var(--ink-soft);background:#fff;border:0;box-shadow:none;text-align:left;transition:color .18s ease,background-color .18s ease}
.accordion-button:not(.collapsed){color:var(--brand);background:#fff;box-shadow:none}
.accordion-button::after{display:none}
.accordion-button:focus{box-shadow:none}
.accordion-body{padding:0 18px 18px;font-size:15px;line-height:1.8;color:var(--muted);border-top:1px dashed var(--line);padding-top:14px}
.accordion-item.acc-open{border-left:3px solid var(--accent)}
.faq-sign{position:relative;width:16px;height:16px;flex:0 0 16px;margin-left:auto}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:var(--brand);border-radius:2px;transition:opacity .2s ease}
.faq-sign::before{width:14px;height:2px}
.faq-sign::after{width:2px;height:14px}
.accordion-button:not(.collapsed) .faq-sign::after{opacity:0}

/* ---------- CTA 条 ---------- */
.cta-strip{background:var(--brand-soft);border:1px solid #CFE4EC;border-radius:var(--radius-card);padding:32px 34px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.cta-strip .cta-text{max-width:640px}
.cta-strip h2{font-size:clamp(20px,2vw,26px);font-weight:700;color:var(--ink-soft)}
.cta-strip p{margin-top:10px;font-size:15.5px;line-height:1.75;color:var(--muted)}
.cta-strip .cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#E9F1F4;padding:68px 0 26px}
.footer-grid{display:grid;grid-template-columns:2.1fr 1fr 1.4fr 1.4fr;gap:32px}
.footer-brand .brand-mark{font-size:20px;color:#E9F1F4;display:block}
.footer-brand .brand-mark span{color:#F0A077}
.footer-brand .brand-sub{display:block;font-size:12px;color:#A9BFC7;margin-top:4px}
.footer-brand p{margin-top:14px;font-size:14px;line-height:1.8;color:#A9BFC7;max-width:340px}
.footer-col h4{font-size:15px;font-weight:600;color:#E9F1F4;margin-bottom:16px}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:#A9BFC7}
.footer-col a:hover{color:#fff}
.footer-col p{font-size:14px;color:#A9BFC7;line-height:1.8;margin-bottom:8px}
.footer-bottom{margin-top:44px;padding-top:20px;border-top:1px solid rgba(226,232,235,.16);display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px;color:#8FA6AE}

/* ---------- 返回顶部 ---------- */
.to-top{position:fixed;right:22px;bottom:26px;width:44px;height:44px;border-radius:50%;border:0;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-2);opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .22s ease,transform .22s ease,background-color .18s ease;cursor:pointer;z-index:1040}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--brand-dark)}
.to-top svg{width:18px;height:18px}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .footer-grid{grid-template-columns:1.8fr 1fr 1.2fr 1.2fr;gap:26px}
}
@media (max-width:991.98px){
  .section{padding:60px 0}
  .page-hero{padding:52px 0 46px;min-height:260px}
  .doc-body{padding:6px 22px 24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .to-top{right:16px;bottom:18px}
}
@media (max-width:767.98px){
  .section{padding:52px 0}
  .point-grid,.step-grid,.faq-grid{grid-template-columns:1fr}
  .doc-section{padding:26px 0}
  .cta-strip{padding:26px 22px}
  .cta-strip .cta-actions{width:100%}
  .cta-strip .cta-actions .btn{width:100%}
  .hero-meta span{font-size:12.5px}
}
@media (max-width:575.98px){
  .container{padding:0 16px}
  .footer-grid{grid-template-columns:1fr}
  .page-hero h1{font-size:26px}
  .brand-mark{font-size:19px}
  .brand-sub{font-size:11px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: category2 */
:root{
  --brand:#1A6B8C;
  --brand-dark:#12556F;
  --brand-active:#0E4459;
  --brand-soft:#E8F2F6;
  --accent:#E2703A;
  --accent-soft:#FBEEE6;
  --accent-ink:#B4501F;
  --green:#2E8B6E;
  --ink:#10262F;
  --ink-soft:#A9BFC7;
  --ink-text:#E9F1F4;
  --text:#1B2A32;
  --muted:#566A74;
  --weak:#8A9BA3;
  --line:#E2E8EB;
  --line-hover:#BBD6E0;
  --bg:#F5F7F8;
  --card:#FFFFFF;
  --radius-card:16px;
  --radius-img:14px;
  --radius-btn:10px;
  --radius-block:20px;
  --shadow-1:0 1px 2px rgba(16,38,47,.05);
  --shadow-2:0 10px 24px -14px rgba(16,38,47,.18);
  --shadow-3:0 18px 40px -18px rgba(16,38,47,.26);
  --bs-primary:#1A6B8C;
  --bs-primary-rgb:26,107,140;
  --bs-body-font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --bs-body-color:#1B2A32;
  --bs-body-bg:#F5F7F8;
  --bs-border-color:#E2E8EB;
  --bs-border-radius:10px;
  --bs-border-radius-lg:16px;
  --bs-link-color:#1A6B8C;
  --bs-link-hover-color:#12556F;
  --bs-focus-ring-color:rgba(226,112,58,.45);
  --bs-accordion-active-color:#1A6B8C;
  --bs-accordion-active-bg:#FFFFFF;
  --bs-accordion-btn-focus-box-shadow:0 0 0 2px rgba(226,112,58,.35);
  --bs-accordion-border-color:#E2E8EB;
  --bs-accordion-border-radius:12px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--bs-body-font-family);
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-dark);}
button,input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:0;}
p{margin:0 0 1em;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.reading{max-width:760px;}
.tnum{font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 22px -18px rgba(16,38,47,.45);}
.header-inner{
  max-width:1200px;margin:0 auto;padding:0 24px;
  height:72px;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;
  transition:height .22s ease;
}
.site-header.is-scrolled .header-inner{height:64px;}
.nav-side{display:flex;align-items:center;gap:6px;}
.nav-side.right{justify-content:flex-end;}
.nav-link-item{
  position:relative;
  display:inline-flex;align-items:center;
  padding:8px 10px;border-radius:8px;
  font-size:15px;color:var(--muted);white-space:nowrap;
  transition:color .18s ease,background-color .18s ease;
}
.nav-link-item:hover{color:var(--brand);background:var(--brand-soft);}
.nav-link-item.is-active{color:var(--brand);font-weight:600;}
.nav-link-item.is-active::after{
  content:"";position:absolute;left:10px;right:10px;bottom:1px;
  height:2px;background:var(--accent);border-radius:2px;
}
.brand{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-decoration:none;line-height:1.15;
}
.brand-mark{font-size:20px;font-weight:700;color:var(--brand);}
.brand-mark span{color:var(--accent);}
.brand-sub{font-size:11px;color:var(--weak);margin-top:2px;}
.btn-brand{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;
  background:var(--brand);color:#fff;
  border:1px solid var(--brand);border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;
  transition:background-color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  cursor:pointer;
}
.btn-brand:hover{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-3);}
.btn-brand:active{background:var(--brand-active);border-color:var(--brand-active);transform:none;box-shadow:none;}
.btn-brand.btn-header{padding:9px 16px;font-size:14px;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;background:#fff;color:var(--brand);
  border:1px solid var(--brand);border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;cursor:pointer;
  transition:background-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-dark);transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-ghost:active{transform:none;box-shadow:none;}
.nav-toggle{
  display:none;width:40px;height:40px;padding:0;
  background:#fff;border:1px solid var(--line);border-radius:10px;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--brand);border-radius:2px;transition:transform .2s ease,opacity .2s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.mobile-panel{
  display:none;
  border-top:1px solid var(--line);
  background:#fff;
  padding:8px 24px 20px;
}
.mobile-panel.is-open{display:block;}
.mobile-panel a.m-item{
  display:flex;align-items:center;height:48px;
  border-bottom:1px solid var(--line);
  color:var(--muted);font-size:15px;
}
.mobile-panel a.m-item.is-active{color:var(--brand);font-weight:600;}
.mobile-panel .btn-brand{width:100%;margin-top:16px;}

/* ---------- page head ---------- */
.page-head{
  background:#fff;
  border-bottom:1px solid var(--line);
  padding:52px 0 44px;
}
.breadcrumb-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--weak);margin-bottom:18px;
}
.breadcrumb-bar a{color:var(--muted);}
.breadcrumb-bar a:hover{color:var(--brand);}
.breadcrumb-bar .sep{color:var(--weak);}
.breadcrumb-bar .current{color:var(--weak);}
.page-head h1{
  font-size:clamp(28px,3.6vw,40px);
  font-weight:700;
  max-width:900px;
}
.page-head .lead-text{
  margin-top:16px;max-width:760px;
  font-size:17px;color:var(--muted);
}
.head-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.badge-soft{
  display:inline-flex;align-items:center;
  padding:6px 12px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand);
  font-size:13px;font-weight:600;
}
.badge-new{
  display:inline-flex;align-items:center;
  padding:6px 12px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent-ink);
  font-size:13px;font-weight:600;
}

/* ---------- sections ---------- */
.section{padding:88px 0;}
.section.tight{padding:64px 0;}
.section-title{
  font-size:clamp(22px,2.4vw,30px);
  font-weight:700;
  margin-bottom:14px;
}
.section-sub{color:var(--muted);max-width:760px;margin-bottom:36px;}
.eyebrow{
  display:inline-block;
  font-size:14px;font-weight:600;color:var(--brand);
  margin-bottom:12px;
}

/* ---------- timeline ---------- */
.timeline{position:relative;padding-left:36px;}
.timeline::before{
  content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;
  background:var(--brand);opacity:.35;border-radius:2px;
}
.tl-item{position:relative;padding-bottom:32px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-36px;top:8px;
  width:12px;height:12px;border-radius:50%;
  background:var(--accent);border:3px solid #fff;
  box-shadow:0 0 0 2px rgba(226,112,58,.28);
}
.tl-num{
  display:block;
  font-size:14px;font-weight:700;color:var(--accent);
  font-variant-numeric:tabular-nums;letter-spacing:0;
  margin-bottom:6px;
}
.tl-item h3{font-size:19px;font-weight:600;margin-bottom:8px;}
.tl-item p{font-size:15px;line-height:1.75;color:var(--muted);margin:0;max-width:700px;}

/* ---------- figure ---------- */
.figure-block{
  margin-top:44px;
  border:1px solid var(--line);
  border-radius:var(--radius-block);
  overflow:hidden;
  background:#fff;
  box-shadow:var(--shadow-2);
}
.figure-block img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.figure-caption{
  padding:14px 20px;font-size:13px;color:var(--weak);
  border-top:1px solid var(--line);
  background:#fff;
}

/* ---------- table ---------- */
.table-wrap{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:#fff;
  overflow-x:auto;
  box-shadow:var(--shadow-1);
}
.compare-table{width:100%;min-width:680px;border-collapse:collapse;font-size:15px;}
.compare-table th,.compare-table td{
  padding:16px 18px;text-align:left;vertical-align:top;
  border-bottom:1px solid var(--line);
}
.compare-table thead th{
  background:var(--brand-soft);
  color:var(--brand-dark);
  font-size:14px;font-weight:600;white-space:nowrap;
}
.compare-table tbody tr{transition:background-color .16s ease;}
.compare-table tbody tr:hover{background:#F7FBFC;}
.compare-table tbody tr:last-child td{border-bottom:none;}
.compare-table td:first-child{font-weight:600;color:var(--text);}
.compare-table td{color:var(--muted);}

/* ---------- stats ---------- */
.stats-row{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  margin-top:44px;
}
.stat-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px;box-shadow:var(--shadow-1);
  transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.stat-card:hover{box-shadow:var(--shadow-3);transform:translateY(-2px);border-color:var(--line-hover);}
.stat-num{
  font-size:34px;font-weight:700;color:var(--green);
  font-variant-numeric:tabular-nums;line-height:1.1;
}
.stat-label{margin-top:8px;font-size:13px;color:var(--weak);}

/* ---------- checklist ---------- */
.check-list{display:grid;grid-template-columns:repeat(2,1fr);gap:20px 28px;margin-top:36px;}
.check-list li{
  position:relative;padding-left:22px;
  font-size:17px;line-height:1.8;color:var(--text);
}
.check-list li::before{
  content:"";position:absolute;left:0;top:12px;
  width:8px;height:8px;border-radius:50%;background:var(--accent);
}

/* ---------- faq ---------- */
.faq-list{margin-top:32px;}
.accordion-item{
  border:1px solid var(--line);
  border-radius:12px !important;
  margin-bottom:12px;
  overflow:hidden;
  background:#fff;
  box-shadow:var(--shadow-1);
}
.accordion-button{
  font-size:17px;font-weight:600;color:var(--text);
  padding:18px 20px;background:#fff;
  box-shadow:none !important;
  transition:color .18s ease,background-color .18s ease;
}
.accordion-button:not(.collapsed){color:var(--brand);background:#fff;}
.accordion-button::after{
  content:"+";
  background-image:none !important;
  width:24px;height:24px;
  display:flex;align-items:center;justify-content:center;
  font-size:20px;line-height:1;color:var(--brand);
  transform:none !important;
  transition:color .18s ease;
}
.accordion-button:not(.collapsed)::after{content:"−";color:var(--accent);}
.accordion-button:hover{color:var(--brand);}
.accordion-item:has(.accordion-button:not(.collapsed)){border-left:3px solid var(--accent);}
.accordion-body{
  padding:4px 20px 22px;
  font-size:15px;line-height:1.8;color:var(--muted);
  background:#fff;
}
.accordion-collapse{transition:height .24s ease;}

/* ---------- cta band ---------- */
.cta-band{
  margin-top:56px;
  background:var(--brand-soft);
  border:1px solid var(--line);
  border-radius:var(--radius-block);
  padding:32px 36px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(20px,2vw,24px);margin-bottom:8px;}
.cta-band p{margin:0;font-size:15px;color:var(--muted);max-width:640px;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--ink);
  color:var(--ink-text);
  padding:72px 0 0;
  margin-top:24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-brand .brand-mark{color:#fff;font-size:20px;}
.footer-brand .brand-mark span{color:var(--accent);}
.footer-brand .brand-sub{color:var(--ink-soft);font-size:11px;display:block;margin-top:2px;}
.footer-brand p{margin:16px 0 0;font-size:14px;line-height:1.8;color:var(--ink-soft);max-width:320px;}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{color:var(--ink-soft);font-size:14px;}
.footer-col a:hover{color:#fff;}
.footer-col p{font-size:14px;color:var(--ink-soft);margin:0 0 8px;}
.footer-bottom{
  border-top:1px solid rgba(233,241,244,.16);
  padding:20px 0 28px;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-soft);
}

/* ---------- back to top ---------- */
.to-top{
  position:fixed;right:22px;bottom:26px;z-index:1040;
  width:44px;height:44px;border-radius:50%;
  background:var(--brand);color:#fff;border:none;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-3);cursor:pointer;
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease,background-color .18s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;}
.to-top:hover{background:var(--brand-dark);}
.to-top svg{width:18px;height:18px;}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
}
@media (max-width:991.98px){
  .nav-side{display:none;}
  .header-inner{display:flex;align-items:center;height:64px;gap:12px;}
  .nav-toggle{display:inline-flex;}
  .brand{flex:1;align-items:center;}
  .header-inner::after{content:"";width:40px;flex:0 0 40px;}
  .section{padding:72px 0;}
  .section.tight{padding:56px 0;}
  .page-head{padding:40px 0 34px;}
  .cta-band{padding:28px;}
}
@media (max-width:767.98px){
  .container{padding:0 20px;}
  .header-inner{padding:0 20px;}
  .mobile-panel{padding:8px 20px 20px;}
  .section{padding:56px 0;}
  .section.tight{padding:48px 0;}
  .stats-row{grid-template-columns:1fr;}
  .check-list{grid-template-columns:1fr;}
  .timeline{padding-left:28px;}
  .timeline::before{left:6px;}
  .tl-item::before{left:-28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-bottom{flex-direction:column;gap:6px;}
}
@media (max-width:575.98px){
  .page-head h1{font-size:26px;}
  .page-head .lead-text{font-size:15px;}
  .cta-band{padding:22px;flex-direction:column;align-items:flex-start;}
  .cta-band .btn-brand,.cta-band .btn-ghost{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .stat-num{font-size:28px;}
  .compare-table th,.compare-table td{padding:12px 14px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
  .stat-card:hover,.btn-brand:hover,.btn-ghost:hover{transform:none;}
}

/* roulang page: category3 */
:root{
  --brand:#1A6B8C;
  --brand-dark:#12556F;
  --brand-active:#0E4459;
  --brand-soft:#E8F2F6;
  --accent:#E2703A;
  --accent-soft:#FBEEE6;
  --accent-deep:#B4501F;
  --green:#2E8B6E;
  --ink:#10262F;
  --ink-text:#E9F1F4;
  --ink-sub:#A9BFC7;
  --text:#1B2A32;
  --muted:#566A74;
  --weak:#8A9BA3;
  --line:#E2E8EB;
  --line-hover:#BBD6E0;
  --bg:#F5F7F8;
  --card:#FFFFFF;
  --radius-card:16px;
  --radius-img:14px;
  --radius-btn:10px;
  --radius-badge:999px;
  --shadow-1:0 1px 2px rgba(16,38,47,.05);
  --shadow-2:0 10px 24px -14px rgba(16,38,47,.18);
  --shadow-3:0 18px 40px -18px rgba(16,38,47,.26);
  --bs-primary:#1A6B8C;
  --bs-primary-rgb:26,107,140;
  --bs-body-font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --bs-body-color:#1B2A32;
  --bs-border-radius:10px;
  --bs-link-color:#1A6B8C;
  --bs-link-hover-color:#E2703A;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--bs-body-font-family);
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--accent)}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 16px}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;color:var(--text);letter-spacing:0}
h1{font-size:clamp(30px,4.2vw,46px)}
h2{font-size:clamp(24px,2.6vw,32px)}
h3{font-size:20px;font-weight:600}
h4{font-size:17px;font-weight:600}
strong{font-weight:600}

.container,.container-sm,.container-md,.container-lg,.container-xl,.container-xxl{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(255,255,255,.97);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 10px 24px -22px rgba(16,38,47,.55);
}
.header-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  height:72px;
  transition:height .25s ease;
}
.site-header.is-scrolled .header-inner{height:64px}
.nav-side{display:flex;align-items:center;gap:26px}
.nav-side.left{justify-self:start}
.nav-side.right{justify-self:end;gap:18px}
.nav-link-item{
  position:relative;
  display:inline-block;
  font-size:15px;
  font-weight:500;
  color:var(--muted);
  padding:6px 0;
  white-space:nowrap;
}
.nav-link-item::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  border-radius:2px;
  background:transparent;
  transition:background .2s ease;
}
.nav-link-item:hover{color:var(--brand)}
.nav-link-item:hover::after{background:var(--line-hover)}
.nav-link-item.is-active{color:var(--brand);font-weight:600}
.nav-link-item.is-active::after{background:var(--accent)}

.brand{
  justify-self:center;
  display:flex;
  flex-direction:column;
  align-items:center;
  text-align:center;
  line-height:1.15;
}
.brand-mark{font-size:22px;font-weight:700;color:var(--ink)}
.brand-mark span{color:var(--brand)}
.brand-sub{font-size:12px;color:var(--weak);margin-top:2px}

.btn{
  font-size:15px;
  font-weight:600;
  border-radius:var(--radius-btn);
  padding:12px 24px;
  border:1px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
  box-shadow:none;
}
.btn-brand{background:var(--brand);border-color:var(--brand);color:#fff}
.btn-brand:hover,.btn-brand:focus{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-brand:active{background:var(--brand-active);border-color:var(--brand-active);transform:none;box-shadow:none}
.btn-ghost{background:#fff;border-color:var(--brand);color:var(--brand)}
.btn-ghost:hover,.btn-ghost:focus{background:var(--brand-soft);border-color:var(--brand-dark);color:var(--brand-dark)}
.btn-ghost:active{background:#D8E9F0;color:var(--brand-active)}
.nav-cta{padding:10px 20px;font-size:14px}

a:focus-visible,button:focus-visible,.btn:focus-visible,.nav-link-item:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
}

.nav-toggle{
  display:none;
  justify-self:end;
  width:44px;height:44px;
  align-items:center;
  justify-content:center;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  color:var(--brand);
  font-size:18px;
  cursor:pointer;
  transition:background .2s ease,border-color .2s ease;
}
.nav-toggle:hover{background:var(--brand-soft);border-color:var(--line-hover)}
.nav-panel{
  display:none;
  background:#fff;
  border-top:1px solid var(--line);
  box-shadow:var(--shadow-2);
  padding:4px 0 16px;
}
.nav-panel.is-open{display:block}
.nav-panel-link{
  display:flex;
  align-items:center;
  height:48px;
  padding:0 24px;
  font-size:15px;
  color:var(--text);
  border-bottom:1px solid var(--line);
}
.nav-panel-link:hover{background:var(--brand-soft);color:var(--brand-dark)}
.nav-panel-link.is-active{color:var(--brand);font-weight:600}
.nav-panel .panel-cta{margin:16px 24px 0;display:block;width:calc(100% - 48px);text-align:center}

/* ---------- 页面横幅 ---------- */
.page-banner{
  position:relative;
  min-height:320px;
  display:flex;
  align-items:flex-end;
  overflow:hidden;
  background:var(--ink);
}
.banner-media{position:absolute;inset:0}
.banner-media img{width:100%;height:100%;object-fit:cover}
.banner-overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(16,38,47,.90) 0%,rgba(16,38,47,.70) 52%,rgba(16,38,47,.46) 100%);
}
.banner-content{position:relative;z-index:2;padding:64px 0 56px;color:#fff;max-width:820px}
.breadcrumb-line{font-size:13px;color:var(--ink-sub);margin-bottom:14px}
.breadcrumb-line span{color:#7E959D;margin:0 6px}
.banner-content h1{color:#fff;margin-bottom:14px}
.banner-content .banner-lead{font-size:17px;line-height:1.8;color:#D8E4E9;max-width:640px;margin:0}

/* ---------- 速览条 ---------- */
.fact-bar{
  position:relative;
  z-index:3;
  margin-top:-38px;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-2);
  overflow:hidden;
}
.fact-item{padding:22px 24px;border-right:1px solid var(--line)}
.fact-item:last-child{border-right:none}
.fact-label{display:block;font-size:13px;color:var(--weak);margin-bottom:6px}
.fact-value{display:block;font-size:16px;font-weight:600;color:var(--brand);font-variant-numeric:tabular-nums}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section-head{max-width:760px;margin-bottom:40px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{margin-bottom:14px}
.section-head p{color:var(--muted);font-size:16px;margin:0}
.eyebrow{
  display:inline-block;
  font-size:14px;
  font-weight:600;
  color:var(--brand);
  background:var(--brand-soft);
  border-radius:var(--radius-badge);
  padding:6px 14px;
  margin-bottom:16px;
}
.tag{
  display:inline-block;
  font-size:13px;
  border-radius:var(--radius-badge);
  padding:5px 12px;
  background:var(--brand-soft);
  color:var(--brand);
  margin-bottom:14px;
}
.tag-accent{background:var(--accent-soft);color:var(--accent-deep)}

/* ---------- 错位卡片 ---------- */
.stagger-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.stagger-col{display:flex;flex-direction:column;gap:24px}
.stagger-col.col-b{padding-top:32px}
.info-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:26px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.info-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-2);
  border-color:var(--line-hover);
}
.icon-badge{
  width:46px;height:46px;
  border-radius:14px;
  background:var(--brand-soft);
  color:var(--brand);
  display:grid;
  place-items:center;
  font-size:18px;
  margin-bottom:18px;
}
.info-card h3{margin-bottom:10px;font-size:18px}
.info-card p{font-size:15px;line-height:1.7;color:var(--muted);margin-bottom:16px}
.link-arrow{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:15px;
  font-weight:600;
  color:var(--brand);
}
.link-arrow::after{
  content:"";
  position:absolute;
  left:0;bottom:-3px;
  height:2px;width:0;
  background:var(--accent);
  transition:width .22s ease;
}
.link-arrow svg{transition:transform .22s ease}
.link-arrow:hover{color:var(--brand-dark)}
.link-arrow:hover::after{width:100%}
.link-arrow:hover svg{transform:translateX(3px)}

/* ---------- 核对清单 ---------- */
.check-wrap{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.check-list li{
  position:relative;
  padding-left:26px;
  font-size:17px;
  line-height:1.85;
  color:var(--text);
  margin-bottom:20px;
}
.check-list li:last-child{margin-bottom:0}
.check-list li::before{
  content:"";
  position:absolute;
  left:4px;
  top:.75em;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--accent);
}
.check-list li strong{display:block;font-size:17px;font-weight:600;margin-bottom:2px}
.check-list li span{font-size:15px;color:var(--muted);line-height:1.75;display:block}
.check-figure{
  border-radius:20px;
  overflow:hidden;
  box-shadow:var(--shadow-2);
  border:1px solid var(--line);
}
.check-figure img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto}
.accordion-item{
  background:var(--card);
  border:1px solid var(--line) !important;
  border-radius:12px !important;
  margin-bottom:12px;
  overflow:hidden;
  box-shadow:var(--shadow-1);
}
.accordion-button{
  font-size:17px;
  font-weight:600;
  color:var(--text);
  background:#fff;
  padding:18px 20px;
  box-shadow:none !important;
  border-radius:12px !important;
  transition:color .2s ease,border-color .2s ease;
}
.accordion-button:not(.collapsed){
  color:var(--brand);
  background:#fff;
  border-left:3px solid var(--accent);
}
.accordion-button:hover{color:var(--brand-dark)}
.accordion-button::after{
  content:"+";
  background-image:none !important;
  width:auto;height:auto;
  font-size:22px;
  font-weight:400;
  color:var(--brand);
  line-height:1;
  transform:none !important;
  transition:color .2s ease;
}
.accordion-button:not(.collapsed)::after{content:"–";color:var(--accent)}
.accordion-body{
  padding:4px 20px 22px;
  font-size:15px;
  line-height:1.85;
  color:var(--muted);
}
.accordion-body p{margin-bottom:0}
.accordion-collapse.collapsing{transition:height .24s ease}

/* ---------- 浅色 CTA ---------- */
.cta-light{
  background:#fff;
  border:1px solid var(--line);
  border-radius:20px;
  box-shadow:var(--shadow-2);
  padding:44px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:44px;
}
.cta-copy h2{margin-bottom:14px;font-size:clamp(22px,2.2vw,28px)}
.cta-copy p{color:var(--muted);font-size:15px;line-height:1.8}
.mini-points{margin-top:20px}
.mini-points li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:15px;
  color:var(--text);
  margin-bottom:12px;
}
.mini-points li i{color:var(--green);font-size:14px;margin-top:6px}
.cta-form .form-row{margin-bottom:16px}
.form-label{display:block;font-size:14px;font-weight:600;color:var(--text);margin-bottom:6px}
.form-label .req{color:var(--accent);margin-left:2px}
.form-control{
  width:100%;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  padding:12px 14px;
  font-size:15px;
  color:var(--text);
  font-family:inherit;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.form-control::placeholder{color:var(--weak)}
.form-control:focus,.form-control:focus-visible{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 2px rgba(26,107,140,.22);
}
textarea.form-control{min-height:104px;resize:vertical}
.form-tip{font-size:13px;color:var(--weak);margin:10px 0 0}
.form-feedback{font-size:14px;color:var(--green);margin-top:10px;display:none}
.form-feedback.show{display:block}
.btn-block{width:100%}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--ink-text);padding:64px 0 0;margin-top:96px}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand .brand-mark{color:#fff;font-size:22px;font-weight:700;display:block}
.footer-brand .brand-mark span{color:#6FB6D2}
.footer-brand .brand-sub{color:var(--ink-sub);font-size:13px;display:block;margin:4px 0 16px}
.footer-brand p{color:var(--ink-sub);font-size:14px;line-height:1.8;margin-bottom:10px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col a{color:var(--ink-sub);font-size:14px}
.footer-col a:hover{color:#fff}
.footer-col p{color:var(--ink-sub);font-size:14px;margin-bottom:10px}
.footer-bottom{
  margin-top:48px;
  padding:20px 0 26px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--ink-sub);
}

/* ---------- 返回顶部 ---------- */
.back-top{
  position:fixed;
  right:24px;bottom:24px;
  width:44px;height:44px;
  border-radius:50%;
  background:var(--brand);
  color:#fff;
  border:none;
  display:grid;
  place-items:center;
  font-size:16px;
  cursor:pointer;
  opacity:0;
  pointer-events:none;
  box-shadow:var(--shadow-2);
  transition:opacity .25s ease,background .2s ease,transform .2s ease;
  z-index:1020;
}
.back-top.is-visible{opacity:1;pointer-events:auto}
.back-top:hover{background:var(--brand-dark);transform:translateY(-2px)}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .check-wrap{gap:36px}
  .cta-light{padding:36px;gap:32px}
}
@media (max-width:991.98px){
  .nav-side{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{grid-template-columns:auto 1fr auto;height:64px}
  .section{padding:72px 0}
  .site-footer{padding-top:52px;margin-top:72px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .check-wrap{grid-template-columns:1fr;gap:32px}
  .check-figure{order:-1}
  .cta-light{grid-template-columns:1fr;padding:32px}
  .fact-bar{grid-template-columns:repeat(2,1fr)}
  .fact-item:nth-child(2){border-right:none}
  .fact-item:nth-child(1),.fact-item:nth-child(2){border-bottom:1px solid var(--line)}
}
@media (max-width:767.98px){
  .container{padding-left:20px;padding-right:20px}
  .page-banner{min-height:280px}
  .banner-content{padding:48px 0 40px}
  .banner-content .banner-lead{font-size:15px}
  .stagger-grid{grid-template-columns:1fr}
  .stagger-col.col-b{padding-top:0}
  .check-list li{font-size:16px}
  .check-list li strong{font-size:16px}
}
@media (max-width:575.98px){
  .section{padding:52px 0}
  .fact-bar{grid-template-columns:1fr;margin-top:-28px}
  .fact-item{border-right:none;border-bottom:1px solid var(--line)}
  .fact-item:last-child{border-bottom:none}
  .info-card{padding:20px}
  .cta-light{padding:24px;border-radius:16px}
  .btn{width:100%;text-align:center}
  .btn.nav-cta{width:auto}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:6px}
  .nav-panel .panel-cta{width:calc(100% - 48px)}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}