/* roulang page: index */
:root{
  --brand:#17395E;
  --brand-dark:#0F2A47;
  --brand-light:#2F6FA8;
  --accent:#E36A2E;
  --accent-dark:#C95A22;
  --accent-soft:#FBEDE5;
  --pos:#1E8E6B;
  --neg:#C0492F;
  --t1:#0F1B26;
  --t2:#42525F;
  --t3:#7C8B99;
  --bg:#F6F8FA;
  --surface:#FFFFFF;
  --alt:#EEF3F8;
  --footer:#12293F;
  --line:#E3E8ED;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh1:0 1px 2px rgba(15,27,38,.05),0 10px 24px -14px rgba(15,27,38,.12);
  --sh2:0 2px 4px rgba(15,27,38,.06),0 18px 36px -18px rgba(23,57,94,.22);
  --font:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --bs-primary:#17395E;
  --bs-body-color:#42525F;
  --bs-body-bg:#F6F8FA;
  --bs-border-color:#E3E8ED;
  --bs-border-radius:10px;
  --bs-link-color:#2F6FA8;
  --bs-link-hover-color:#0F2A47;
  --bs-font-sans-serif:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --bs-body-font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);font-size:16px;line-height:1.85;color:var(--t2);
  background:var(--bg);-webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{margin:0;color:var(--t1);font-weight:700;line-height:1.35}
p{margin:0 0 16px}
img{max-width:100%;display:block;border:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--brand-light);text-decoration:none;transition:color .2s ease-out}
a:hover{color:var(--brand-dark)}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand-light);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
.section{padding:96px 0}
.section-alt{background:var(--alt)}
.section-white{background:var(--surface)}
.eyebrow{
  font-size:13px;letter-spacing:.08em;color:var(--t3);margin:0 0 10px;font-weight:600;
}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;
}
.section-head h2{font-size:30px;font-weight:650;letter-spacing:.01em}
.section-head .lead{max-width:760px;margin-top:12px;font-size:15px;color:var(--t3);line-height:1.8}
.link-more{
  font-size:15px;font-weight:600;color:var(--brand);white-space:nowrap;
  text-underline-offset:4px;border-bottom:1px solid transparent;padding-bottom:2px;
}
.link-more:hover{color:var(--accent);border-bottom-color:var(--accent)}
.prose{max-width:760px;font-size:16px;line-height:1.85}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-btn);font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;text-decoration:none;cursor:pointer;
  transition:background-color .2s ease-out,color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
}
.btn-brand{background:var(--brand);color:#fff;box-shadow:var(--sh1)}
.btn-brand:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh2)}
.btn-brand:active{transform:translateY(0);box-shadow:var(--sh1)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:var(--sh1)}
.btn-accent:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh2)}
.btn-accent:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand)}
.btn-ghost:hover{background:var(--alt);color:var(--brand-dark)}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:9px}
.btn-block{width:100%}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease-out;
}
.site-header.is-stuck{box-shadow:0 1px 0 var(--line),0 6px 18px -16px rgba(15,27,38,.30)}
.header-inner{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:flex;align-items:center;gap:10px;color:var(--t1);flex-shrink:0}
.brand:hover{color:var(--brand)}
.brand-mark{width:24px;height:24px;color:var(--brand);flex-shrink:0}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.02em;color:var(--t1);line-height:1.1;display:flex;flex-direction:column}
.brand-text .brand-sub{font-size:11px;font-weight:500;color:var(--t3);letter-spacing:.14em;margin-top:3px}
.main-nav{display:flex;align-items:center;gap:28px;margin-left:auto}
.main-nav .nav-link{
  position:relative;padding:6px 0;font-size:15px;font-weight:500;color:var(--t2);
  transition:color .2s ease-out;
}
.main-nav .nav-link:hover{color:var(--brand)}
.main-nav .nav-link.active{color:var(--t1);font-weight:600}
.main-nav .nav-link.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-8px;height:2px;border-radius:2px;background:var(--brand);
}
.main-nav .nav-link.active::before{
  content:"";position:absolute;left:-11px;top:50%;transform:translateY(-50%);
  width:4px;height:4px;border-radius:999px;background:var(--accent);
}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.icon-btn{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--t2);cursor:pointer;
  transition:background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.icon-btn:hover{background:var(--alt);color:var(--brand);border-color:#D6DEE7}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:#fff;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;cursor:pointer;
}
.nav-toggle span{display:block;width:16px;height:1.5px;background:var(--t1);border-radius:2px;transition:transform .2s ease-out,opacity .2s ease-out}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}
.nav-mask{
  position:fixed;inset:0;background:#0F1B26;opacity:0;pointer-events:none;
  transition:opacity .2s ease-out;z-index:1050;
}
.nav-mask.show{opacity:.4;pointer-events:auto}

/* ---------- Hero ---------- */
.hero{background:#fff;border-bottom:1px solid var(--line);padding:72px 0 96px}
.hero h1{font-size:42px;line-height:1.25;font-weight:700;letter-spacing:.01em;margin-bottom:20px}
.hero-sub{font-size:17px;line-height:1.85;color:var(--t2);max-width:640px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:32px}
.hero-trust{display:flex;flex-wrap:wrap;align-items:center;gap:16px;font-size:13px;color:var(--t3)}
.hero-trust span{position:relative;padding-left:0}
.hero-trust span + span{padding-left:16px;border-left:1px solid var(--line)}
.hero-media{
  border-radius:var(--r-img);overflow:hidden;box-shadow:var(--sh2);aspect-ratio:4/3;
  background:var(--alt);
}
.hero-media img{width:100%;height:100%;object-fit:cover}

/* ---------- 指标看板 ---------- */
.metrics-band{background:#fff;padding:64px 0;border-bottom:1px solid var(--line)}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.metric{padding:4px 32px;border-left:1px solid var(--line)}
.metric:first-child{border-left:0;padding-left:0}
.metric-num{
  font-size:52px;font-weight:700;line-height:1.1;color:var(--brand);
  font-variant-numeric:tabular-nums;margin-bottom:8px;
}
.metric-num.accent{color:var(--accent)}
.metric-label{font-size:12px;color:var(--t3);letter-spacing:.06em;margin-bottom:6px}
.metric-desc{font-size:13px;color:var(--t3);line-height:1.7}

/* ---------- 服务矩阵 ---------- */
.svc-stack{display:flex;flex-direction:column;gap:24px;height:100%}
.svc-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh1);
  overflow:hidden;transition:transform .2s ease-out,box-shadow .2s ease-out;
  display:flex;flex-direction:column;height:100%;
}
.svc-card:hover{transform:translateY(-2px);box-shadow:var(--sh2)}
.svc-no{
  font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--brand-light);
  font-variant-numeric:tabular-nums;
}
.svc-body{padding:28px 28px 26px;display:flex;flex-direction:column;gap:12px;flex:1}
.svc-card h3{font-size:22px;font-weight:600;line-height:1.4}
.svc-card p{font-size:15px;line-height:1.8;color:var(--t2);margin:0}
.svc-media{aspect-ratio:16/9;background:var(--alt);overflow:hidden}
.svc-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.svc-card:hover .svc-media img{transform:scale(1.02)}
.svc-link{
  margin-top:auto;font-size:14px;font-weight:600;color:var(--brand);
  display:inline-flex;align-items:center;gap:6px;
}
.svc-link::after{content:"→";transition:transform .2s ease-out}
.svc-link:hover{color:var(--accent)}
.svc-link:hover::after{transform:translateX(3px)}
.svc-mini{padding:24px 26px}
.svc-mini h3{font-size:19px}
.svc-band-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh1);
  padding:26px 30px;display:flex;align-items:center;gap:28px;
  transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.svc-band-card:hover{transform:translateY(-2px);box-shadow:var(--sh2)}
.svc-band-icon{
  width:56px;height:56px;border-radius:14px;background:var(--alt);color:var(--brand);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.svc-band-card .svc-band-text{flex:1}

/* ---------- 资讯列表 ---------- */
.post-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh1);
  overflow:hidden;height:100%;display:flex;flex-direction:column;
  transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--sh2)}
.post-media{aspect-ratio:16/9;background:var(--alt);overflow:hidden}
.post-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.post-card:hover .post-media img{transform:scale(1.02)}
.post-body{padding:22px 22px 20px;display:flex;flex-direction:column;gap:12px;flex:1}
.badge-soft{
  display:inline-block;padding:5px 10px;border-radius:999px;background:#F1F4F7;color:var(--t2);
  font-size:13px;font-weight:500;line-height:1.4;width:fit-content;
}
.post-body h3{font-size:18px;font-weight:600;line-height:1.5}
.post-body h3 a{color:var(--t1)}
.post-body h3 a:hover{color:var(--brand)}
.post-summary{font-size:15px;line-height:1.8;color:var(--t2);margin:0}
.post-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--t3);
}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.empty-state{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:64px 24px;text-align:center;
}
.empty-state svg{color:#C7D2DC;margin-bottom:16px}
.empty-state p{font-size:15px;color:var(--t3);margin-bottom:20px}

/* ---------- 结果对比 ---------- */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.compare-col h3{
  font-size:18px;font-weight:600;margin-bottom:24px;display:flex;align-items:center;gap:10px;
}
.compare-col h3 .dot{width:8px;height:8px;border-radius:999px;flex-shrink:0}
.dot-before{background:#C7D2DC}
.dot-after{background:var(--pos)}
.compare-item{margin-bottom:22px}
.compare-line{display:flex;justify-content:space-between;font-size:14px;color:var(--t2);margin-bottom:8px}
.compare-line b{font-weight:600;color:var(--t1);font-variant-numeric:tabular-nums}
.bar{height:6px;border-radius:999px;background:#DDE4EB;overflow:hidden}
.bar span{display:block;height:100%;border-radius:999px}
.bar-before span{background:#C7D2DC}
.bar-after span{background:var(--pos)}
.compare-note{font-size:13px;color:var(--t3);margin-top:32px;line-height:1.7}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px}
.faq-accordion .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.faq-accordion .accordion-item:first-child{border-top:1px solid var(--line)}
.faq-accordion .accordion-button{
  background:transparent;box-shadow:none;padding:20px 0;font-size:17px;font-weight:600;color:var(--t1);
  border-radius:0;
}
.faq-accordion .accordion-button:focus{box-shadow:none;outline:2px solid var(--brand-light);outline-offset:2px}
.faq-accordion .accordion-button:not(.collapsed){color:var(--brand);background:transparent;box-shadow:none}
.faq-accordion .accordion-button::after{
  content:"＋";background-image:none;width:auto;height:auto;font-size:20px;line-height:1;
  color:var(--brand);display:flex;align-items:center;justify-content:center;
  transform:none;transition:transform .2s ease-out;flex-shrink:0;
}
.faq-accordion .accordion-button:not(.collapsed)::after{transform:rotate(45deg)}
.faq-accordion .accordion-body{padding:0 0 20px;font-size:15px;line-height:1.9;color:var(--t2)}

/* ---------- 表单 ---------- */
.contact-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh1);padding:36px;
}
.form-label{font-size:14px;font-weight:600;color:var(--t1);margin-bottom:8px;display:block}
.form-control,.form-select{
  height:46px;border-radius:10px;border:1px solid var(--line);font-size:15px;color:var(--t1);
  background:#fff;padding:0 14px;transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.form-control:focus,.form-select:focus{
  border-color:var(--brand);box-shadow:0 0 0 3px rgba(47,111,168,.14);
}
textarea.form-control{height:auto;min-height:112px;padding:12px 14px;line-height:1.7}
.form-hint{font-size:13px;color:var(--t3);line-height:1.7;margin-top:16px}
.form-actions{display:flex;justify-content:flex-end;margin-top:24px}
.contact-points li{
  display:flex;gap:12px;font-size:15px;color:var(--t2);margin-bottom:14px;line-height:1.75;
}
.contact-points li::before{
  content:"";width:6px;height:6px;border-radius:999px;background:var(--accent);margin-top:11px;flex-shrink:0;
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--footer);color:#C6D3DE;padding:72px 0 0}
.site-footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:18px;letter-spacing:.04em}
.site-footer a{color:#C6D3DE;font-size:14px}
.site-footer a:hover{color:var(--accent)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.footer-brand .brand-mark{color:#fff}
.footer-brand .brand-text{color:#fff}
.footer-brand .brand-text .brand-sub{color:#8DA3B5}
.footer-desc{font-size:14px;line-height:1.8;color:#A9BCCB;max-width:300px;margin-bottom:14px}
.footer-domain{font-size:13px;color:#8DA3B5;letter-spacing:.04em}
.footer-links li{margin-bottom:12px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);margin-top:56px;padding:22px 0;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:#8DA3B5;
}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .container{max-width:100%}
  .hero h1{font-size:38px}
}
@media (max-width:991.98px){
  .section{padding:72px 0}
  .section-head h2{font-size:26px}
  .hero{padding:56px 0 64px}
  .hero h1{font-size:34px}
  .hero-media{margin-top:36px}
  .metrics-grid{grid-template-columns:repeat(2,1fr);row-gap:36px}
  .metric{padding:0 24px}
  .metric:nth-child(odd){border-left:0;padding-left:0}
  .compare-grid{gap:32px}
  .main-nav{
    position:fixed;top:0;right:0;height:100vh;width:290px;max-width:86vw;
    background:#fff;flex-direction:column;align-items:flex-start;gap:0;
    padding:84px 24px 32px;margin-left:0;z-index:1060;
    transform:translateX(100%);transition:transform .24s ease-out;
    box-shadow:-18px 0 40px -24px rgba(15,27,38,.45);overflow-y:auto;
  }
  .main-nav.open{transform:translateX(0)}
  .main-nav .nav-link{width:100%;padding:14px 0;font-size:17px;border-bottom:1px solid var(--line)}
  .main-nav .nav-link.active::after{display:none}
  .main-nav .nav-link.active::before{display:none}
  .main-nav .nav-link.active{color:var(--brand)}
  .nav-toggle{display:inline-flex}
  .header-actions .btn-ghost{display:none}
}
@media (max-width:767.98px){
  .container{padding-left:20px;padding-right:20px}
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:28px}
  .section-head h2{font-size:23px}
  .hero h1{font-size:28px}
  .hero-sub{font-size:16px;line-height:1.9}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .hero-trust{flex-direction:column;align-items:flex-start;gap:8px}
  .hero-trust span + span{padding-left:0;border-left:0}
  .metric-num{font-size:40px}
  .metrics-band{padding:48px 0}
  .compare-grid{grid-template-columns:1fr;gap:36px}
  .contact-card{padding:24px}
  .form-actions{justify-content:stretch}
  .form-actions .btn{width:100%}
  .svc-band-card{flex-direction:column;align-items:flex-start;gap:16px}
  .site-footer{padding:56px 0 0}
  .footer-bottom{flex-direction:column}
  h2{font-size:23px}
  h3{font-size:19px}
  body{line-height:1.9}
}
@media (max-width:575.98px){
  .brand-text{font-size:15px}
  .brand-text .brand-sub{font-size:10px;letter-spacing:.1em}
  .hero{padding:40px 0 48px}
  .metric{padding:0 16px}
}

/* roulang page: article */
:root{
  --brand:#17395E;
  --brand-dark:#0F2A47;
  --brand-light:#2F6FA8;
  --accent:#E36A2E;
  --accent-dark:#C8581F;
  --accent-soft:#FBEDE5;
  --positive:#1E8E6B;
  --ink:#0F1B26;
  --text:#42525F;
  --muted:#7C8B99;
  --bg:#F6F8FA;
  --surface:#FFFFFF;
  --band:#EEF3F8;
  --footer-bg:#12293F;
  --line:#E3E8ED;
  --row-alt:#FAFBFC;

  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;

  --shadow-1:0 1px 2px rgba(15,27,38,.05), 0 10px 24px -14px rgba(15,27,38,.12);
  --shadow-2:0 2px 4px rgba(15,27,38,.06), 0 18px 36px -18px rgba(23,57,94,.22);

  --bs-primary:#17395E;
  --bs-primary-rgb:23,57,94;
  --bs-body-color:#42525F;
  --bs-body-bg:#F6F8FA;
  --bs-border-color:#E3E8ED;
  --bs-border-radius:10px;
  --bs-border-radius-lg:14px;
  --bs-link-color:#17395E;
  --bs-link-hover-color:#E36A2E;
  --bs-font-sans-serif:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;text-underline-offset:4px;transition:color .2s ease-out;}
a:hover{color:var(--accent);}
h1,h2,h3,h4,h5{margin:0;color:var(--ink);font-weight:600;}
p{margin:0 0 16px;}
ul,ol{margin:0;padding:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand-light);outline-offset:2px;}

.container{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;width:100%;}

/* ========== 头部导航 ========== */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease-out;
}
.site-header.is-stuck{box-shadow:0 1px 0 var(--line),0 8px 24px -20px rgba(15,27,38,.4);}
.header-inner{display:flex;align-items:center;gap:32px;height:72px;}

.brand{display:flex;align-items:center;gap:10px;flex:none;color:var(--ink);}
.brand-mark{width:24px;height:24px;flex:none;color:var(--brand);}
.brand-text{display:inline-flex;align-items:baseline;font-size:18px;font-weight:700;color:var(--ink);letter-spacing:.01em;}
.brand-sub{font-size:12px;font-weight:500;color:var(--muted);margin-left:6px;letter-spacing:.02em;}

.main-nav{display:flex;align-items:center;margin-left:auto;}
.main-nav .nav-link{
  position:relative;
  display:inline-block;
  padding:8px 0;
  margin:0 15px;
  font-size:15px;
  font-weight:500;
  color:var(--text);
  line-height:1.4;
  transition:color .18s ease-out;
}
.main-nav .nav-link:hover{color:var(--brand);}
.main-nav .nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:6px;
  height:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s ease-out;
}
.main-nav .nav-link.active{color:var(--ink);font-weight:600;}
.main-nav .nav-link.active::after{transform:scaleX(1);}
.main-nav .nav-link.active::before{
  content:"";
  position:absolute;
  left:-11px;top:50%;
  width:4px;height:4px;
  margin-top:-2px;
  border-radius:999px;
  background:var(--accent);
}

.header-actions{display:flex;align-items:center;gap:12px;flex:none;}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 26px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  cursor:pointer;
  text-align:center;
  transition:background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-outline{background:#fff;border-color:var(--brand);color:var(--brand);}
.btn-outline:hover{background:var(--band);border-color:var(--brand);color:var(--brand-dark);transform:translateY(-1px);}
.btn-accent{background:var(--accent);border-color:var(--accent);color:#fff;}
.btn-accent:hover{background:var(--accent-dark);border-color:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-accent:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--brand);}
.btn-ghost:hover{background:var(--band);border-color:var(--brand-light);color:var(--brand-dark);}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:8px;}

.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;
  border-radius:8px;
  border:1px solid var(--line);
  background:#fff;
  color:var(--text);
  cursor:pointer;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.icon-btn:hover{background:var(--band);color:var(--brand);border-color:var(--brand-light);}

.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:38px;height:38px;
  border:1px solid var(--line);
  border-radius:8px;
  background:#fff;
  cursor:pointer;
  padding:0 9px;
}
.nav-toggle span{display:block;height:2px;width:100%;background:var(--ink);border-radius:2px;transition:transform .2s ease-out,opacity .2s ease-out;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.nav-overlay{position:fixed;inset:0;background:#0F1B26;opacity:0;pointer-events:none;transition:opacity .2s ease-out;z-index:1040;}
body.nav-open .nav-overlay{opacity:.4;pointer-events:auto;}

/* ========== 文章头部 ========== */
.article-head{
  background:#fff;
  border-bottom:1px solid var(--line);
  padding:32px 0 44px;
}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:22px;}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{color:#C3CFD9;}
.crumbs .current{color:var(--text);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

.article-title{
  font-size:clamp(26px,3.1vw,36px);
  line-height:1.35;
  font-weight:700;
  color:var(--ink);
  letter-spacing:-.01em;
  max-width:900px;
  margin:0 0 22px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:var(--muted);}
.badge-cat{
  display:inline-flex;align-items:center;
  padding:5px 13px;
  border-radius:999px;
  background:var(--band);
  color:var(--brand);
  font-size:13px;
  font-weight:500;
  line-height:1.5;
}
.article-meta .dot{width:3px;height:3px;border-radius:999px;background:#C3CFD9;flex:none;}

/* ========== 正文 ========== */
.article-main{padding:56px 0 0;}
.article-content{
  max-width:760px;
  margin:0 auto;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:48px 44px;
}
.article-content > *:first-child{margin-top:0;}
.article-content h2{
  position:relative;
  font-size:26px;
  font-weight:650;
  color:var(--ink);
  line-height:1.4;
  margin:42px 0 18px;
  padding-left:18px;
}
.article-content h2::before{
  content:"";
  position:absolute;
  left:0;top:.36em;
  width:4px;height:24px;
  border-radius:999px;
  background:var(--brand);
}
.article-content h3{font-size:20px;font-weight:600;color:var(--ink);margin:32px 0 14px;line-height:1.5;}
.article-content h4{font-size:17px;font-weight:600;color:var(--ink);margin:26px 0 12px;}
.article-content p{font-size:16px;line-height:1.9;color:var(--text);margin:0 0 20px;}
.article-content ul,.article-content ol{padding-left:24px;margin:0 0 22px;}
.article-content li{font-size:15.5px;line-height:1.85;color:var(--text);margin-bottom:10px;}
.article-content ul li::marker{color:var(--brand);}
.article-content ol li::marker{color:var(--brand);font-weight:600;}
.article-content blockquote{
  margin:26px 0;
  padding:20px 24px;
  background:var(--accent-soft);
  border-left:3px solid var(--accent);
  border-radius:12px;
}
.article-content blockquote p{color:var(--text);margin-bottom:0;font-size:15.5px;}
.article-content img{border-radius:12px;margin:26px auto;box-shadow:var(--shadow-1);}
.article-content figure{margin:26px 0;}
.article-content figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px;line-height:1.7;}
.article-content table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;border:1px solid var(--line);border-radius:12px;overflow:hidden;}
.article-content thead th{background:var(--band);color:var(--ink);font-weight:600;text-align:left;padding:12px 16px;border-bottom:1px solid var(--line);}
.article-content td{padding:12px 16px;border-bottom:1px solid var(--line);color:var(--text);line-height:1.7;}
.article-content tbody tr:nth-child(even){background:var(--row-alt);}
.article-content a{color:var(--brand-light);text-decoration:underline;text-underline-offset:4px;}
.article-content a:hover{color:var(--accent);}
.article-content strong{color:var(--ink);font-weight:600;}
.article-content hr{border:0;border-top:1px solid var(--line);margin:34px 0;}

.empty-state{
  max-width:760px;
  margin:0 auto;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:64px 32px;
  text-align:center;
}
.empty-state .empty-ico{
  width:56px;height:56px;
  margin:0 auto 20px;
  border:1px solid var(--line);
  border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  color:var(--brand-light);
}
.empty-state h2{font-size:20px;margin-bottom:10px;}
.empty-state p{font-size:15px;color:var(--muted);margin-bottom:24px;line-height:1.8;}

/* ========== 相关推荐 ========== */
.related{padding:72px 0 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px;}
.section-head h2{font-size:26px;font-weight:650;color:var(--ink);line-height:1.35;}
.link-more{
  font-size:15px;font-weight:500;color:var(--brand);
  text-decoration:underline;
  text-underline-offset:4px;
  text-decoration-thickness:1px;
  transition:color .18s ease-out,text-decoration-thickness .18s ease-out;
}
.link-more:hover{color:var(--accent);text-decoration-thickness:2px;}

.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.rel-card{
  display:block;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#D6DEE6;color:inherit;}
.rel-thumb{position:relative;aspect-ratio:16/9;background:var(--band);overflow:hidden;}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease-out;}
.rel-card:hover .rel-thumb img{transform:scale(1.02);}
.rel-body{padding:18px 20px 20px;}
.rel-body .badge-cat{margin-bottom:12px;}
.rel-body h3{font-size:17px;line-height:1.55;font-weight:600;color:var(--ink);margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rel-date{font-size:13px;color:var(--muted);margin:0;}

/* ========== 返回入口 ========== */
.back-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:40px;}

/* ========== 转化条 ========== */
.cta-band{background:var(--band);margin-top:88px;padding:56px 0;}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;}
.cta-text{max-width:620px;}
.cta-text h2{font-size:26px;font-weight:650;line-height:1.4;margin-bottom:12px;}
.cta-text p{font-size:15px;line-height:1.8;color:var(--text);margin:0;}

/* ========== 页脚 ========== */
.site-footer{background:var(--footer-bg);color:#C3D0DB;padding:72px 0 0;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{width:24px;height:24px;color:#fff;flex:none;}
.footer-brand .brand-text{color:#fff;font-size:17px;font-weight:600;}
.footer-brand .brand-sub{color:#8FA6B8;font-size:12px;font-weight:400;margin-left:6px;}
.footer-desc{font-size:14px;line-height:1.8;color:#93A9BB;max-width:330px;margin:0 0 14px;}
.footer-domain{font-size:13px;color:#6E8299;letter-spacing:.02em;margin:0;}
.site-footer h4{font-size:15px;font-weight:600;color:#fff;margin:0 0 18px;}
.footer-links{list-style:none;padding:0;margin:0;}
.footer-links li{font-size:14px;line-height:1.9;color:#93A9BB;margin-bottom:10px;}
.footer-links a{color:#B9C8D5;}
.footer-links a:hover{color:var(--accent);}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  border-top:1px solid rgba(255,255,255,.12);
  margin-top:56px;
  padding:24px 0 28px;
  font-size:13px;
  color:#7F95A8;
}

/* ========== 响应式 ========== */
@media (max-width:1199.98px){
  .main-nav .nav-link{margin:0 11px;font-size:14.5px;}
  .related{padding-top:64px;}
}

@media (max-width:991.98px){
  .main-nav{
    position:fixed;
    top:0;right:0;
    height:100%;
    width:78%;
    max-width:340px;
    background:#fff;
    flex-direction:column;
    align-items:stretch;
    padding:88px 26px 32px;
    margin-left:0;
    transform:translateX(105%);
    transition:transform .22s ease-out;
    z-index:1045;
    box-shadow:-20px 0 48px -28px rgba(15,27,38,.5);
    overflow-y:auto;
  }
  .main-nav.is-open{transform:translateX(0);}
  .main-nav .nav-link{
    display:block;
    width:100%;
    margin:0;
    padding:15px 0;
    font-size:17px;
    font-weight:500;
    border-bottom:1px solid var(--line);
  }
  .main-nav .nav-link::after{display:none;}
  .main-nav .nav-link.active::before{display:none;}
  .main-nav .nav-link.active{color:var(--brand);}
  .nav-toggle{display:flex;}
  .header-actions .btn-ghost{display:none;}
  .header-inner{gap:16px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .article-content{padding:40px 32px;}
  .cta-band{margin-top:72px;padding:48px 0;}
}

@media (max-width:767.98px){
  .container{padding-left:20px;padding-right:20px;}
  .header-inner{height:64px;}
  .brand-text{font-size:16px;}
  .brand-sub{font-size:11px;}
  .article-head{padding:24px 0 32px;}
  .crumbs{margin-bottom:16px;font-size:12px;}
  .crumbs .current{max-width:180px;}
  .article-title{font-size:26px;line-height:1.4;margin-bottom:18px;}
  .article-main{padding:36px 0 0;}
  .article-content{padding:28px 20px;border-radius:12px;}
  .article-content h2{font-size:22px;margin:34px 0 16px;}
  .article-content h3{font-size:19px;}
  .article-content p,.article-content li{font-size:16px;line-height:1.95;}
  .article-content blockquote{padding:16px 18px;}
  .article-content table{font-size:14px;}
  .article-content th,.article-content td{padding:10px 12px;}
  .related{padding-top:52px;}
  .section-head h2{font-size:22px;}
  .related-grid{grid-template-columns:1fr;gap:18px;}
  .back-row .btn{width:100%;}
  .cta-band{padding:44px 0;}
  .cta-text h2{font-size:22px;}
  .cta-inner{gap:24px;}
  .cta-inner .btn{width:100%;}
  .site-footer{padding-top:52px;}
  .footer-bottom{margin-top:40px;font-size:12px;}
}

@media (max-width:575.98px){
  .article-title{font-size:24px;}
  .article-meta{gap:10px;font-size:12px;}
  .badge-cat{font-size:12px;padding:4px 11px;}
  .empty-state{padding:48px 22px;}
}

/* roulang page: category1 */
:root{
  --c-primary:#17395E;
  --c-primary-dark:#0F2A47;
  --c-primary-light:#2F6FA8;
  --c-accent:#E36A2E;
  --c-accent-soft:#FBEDE5;
  --c-pos:#1E8E6B;
  --c-neg:#C0492F;
  --t-1:#0F1B26;
  --t-2:#42525F;
  --t-3:#7C8B99;
  --bg:#F6F8FA;
  --bg-card:#FFFFFF;
  --bg-alt:#EEF3F8;
  --bg-footer:#12293F;
  --line:#E3E8ED;
  --line-soft:#FAFBFC;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(15,27,38,.05), 0 10px 24px -14px rgba(15,27,38,.12);
  --sh-2:0 2px 4px rgba(15,27,38,.06), 0 18px 36px -18px rgba(23,57,94,.22);
  --sh-nav:0 1px 0 #E3E8ED;
  --container:1200px;
  --bs-primary:#17395E;
  --bs-primary-rgb:23,57,94;
  --bs-body-color:#42525F;
  --bs-body-bg:#F6F8FA;
  --bs-border-color:#E3E8ED;
  --bs-border-radius:10px;
  --bs-border-radius-lg:14px;
  --bs-link-color:#2F6FA8;
  --bs-link-hover-color:#17395E;
  --bs-font-sans-serif:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--t-2);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;background:var(--bg-alt)}
a{color:var(--c-primary-light);text-decoration:none;transition:color .2s ease-out}
a:hover{color:var(--c-primary)}
h1,h2,h3,h4,h5{color:var(--t-1);margin:0;font-weight:650;line-height:1.35}
h1{font-size:42px;line-height:1.25;font-weight:700}
h2{font-size:30px;line-height:1.35}
h3{font-size:22px;line-height:1.4;font-weight:600}
h4{font-size:18px;line-height:1.5;font-weight:600}
p{margin:0 0 20px;max-width:760px}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0}
:focus-visible{outline:2px solid var(--c-primary-light);outline-offset:2px}
.container{max-width:var(--container);width:100%;margin:0 auto;padding-left:24px;padding-right:24px}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease-out;
}
.site-header.is-stuck{box-shadow:var(--sh-nav)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;color:var(--t-1);flex-shrink:0}
.brand:hover{color:var(--t-1)}
.brand-mark{width:24px;height:24px;color:var(--c-primary);flex-shrink:0}
.brand-text{display:flex;align-items:baseline;gap:6px;font-size:18px;font-weight:700;letter-spacing:.2px;color:var(--t-1);white-space:nowrap}
.brand-sub{font-size:12px;font-weight:500;color:var(--t-3);letter-spacing:.4px}
.main-nav{display:flex;align-items:center;gap:28px}
.nav-link{
  position:relative;
  font-size:15px;font-weight:500;color:var(--t-2);
  padding:6px 0 10px;
  transition:color .2s ease-out;
  white-space:nowrap;
}
.nav-link:hover{color:var(--c-primary)}
.nav-link.active{color:var(--t-1);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;
  background:var(--c-primary);border-radius:999px;
}
.nav-link.active::before{
  content:"";position:absolute;left:-12px;top:13px;
  width:4px;height:4px;border-radius:999px;background:var(--c-accent);
}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.icon-btn{
  width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;color:var(--t-2);
  cursor:pointer;transition:background .2s ease-out,border-color .2s ease-out,color .2s ease-out;
}
.icon-btn:hover{background:var(--bg-alt);border-color:#C7D2DC;color:var(--c-primary)}
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:40px;height:36px;
  border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;cursor:pointer;padding:0 10px}
.nav-toggle span{display:block;height:1.6px;background:var(--t-1);border-radius:2px;transition:transform .2s ease-out,opacity .2s ease-out}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6.6px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6.6px) rotate(-45deg)}
.nav-backdrop{
  position:fixed;inset:0;background:rgba(15,27,38,.4);
  opacity:0;visibility:hidden;transition:opacity .2s ease-out,visibility .2s ease-out;z-index:1040;
}
.nav-backdrop.show{opacity:1;visibility:visible}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:inherit;font-size:15px;font-weight:600;line-height:1.4;
  padding:13px 26px;border-radius:var(--r-btn);border:1px solid transparent;
  cursor:pointer;text-decoration:none;
  transition:background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
}
.btn-main{background:var(--c-primary);color:#fff}
.btn-main:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-main:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-outline{background:#fff;border-color:var(--c-primary);color:var(--c-primary)}
.btn-outline:hover{background:var(--bg-alt);color:var(--c-primary);border-color:var(--c-primary)}
.btn-accent{background:var(--c-accent);color:#fff}
.btn-accent:hover{background:#C9561F;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-accent:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:var(--r-btn)}
.btn-ghost{background:#fff;border-color:var(--c-primary);color:var(--c-primary);font-weight:600}
.btn-ghost:hover{background:var(--bg-alt);color:var(--c-primary)}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--c-primary);
  text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;
  text-decoration-color:rgba(23,57,94,.35);
  transition:color .2s ease-out,text-decoration-color .2s ease-out;
}
.text-link:hover{color:var(--c-accent);text-decoration-color:var(--c-accent)}
.text-link svg{transition:transform .2s ease-out}
.text-link:hover svg{transform:translateX(3px)}

/* ---------- Page head ---------- */
.page-head{background:#fff;border-bottom:1px solid var(--line);padding:36px 0 44px}
.breadcrumb-trail{
  display:flex;align-items:flex-wrap:wrap;gap:8px;
  font-size:13px;line-height:1.7;color:var(--t-3);margin-bottom:24px;
}
.breadcrumb-trail a{color:var(--t-3)}
.breadcrumb-trail a:hover{color:var(--c-primary)}
.breadcrumb-trail .sep{color:#B9C4CE}
.breadcrumb-trail .current{color:var(--t-2)}
.page-head h1{max-width:900px;font-size:42px;letter-spacing:-.2px}
.page-lead{
  margin-top:18px;max-width:760px;font-size:16px;line-height:1.85;color:var(--t-2);
}
.chip-nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;border-radius:999px;
  border:1px solid var(--line);background:#fff;
  font-size:14px;font-weight:500;color:var(--t-2);
  transition:border-color .2s ease-out,color .2s ease-out,background-color .2s ease-out;
}
.chip:hover{border-color:var(--c-primary-light);color:var(--c-primary);background:#F2F6FA}
.chip .n{font-size:12px;font-weight:600;color:var(--c-accent);font-variant-numeric:tabular-nums}

/* ---------- Sections ---------- */
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-head{margin-bottom:40px}
.section-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--c-primary-light);margin-bottom:12px;
}
.section-eyebrow::before{content:"";width:20px;height:2px;background:var(--c-accent);border-radius:999px}
.section-head h2{max-width:760px}
.section-sub{margin-top:14px;max-width:760px;font-size:15px;line-height:1.85;color:var(--t-2)}

/* ---------- Zigzag ---------- */
.zig-list{display:flex;flex-direction:column;gap:72px}
.zig-item{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.zig-item:nth-child(even) .zig-media{order:2}
.zig-item:nth-child(even) .zig-body{order:1}
.zig-media{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  box-shadow:var(--sh-1);background:var(--bg-alt);
}
.zig-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .22s ease-out}
.zig-item:hover .zig-media img{transform:scale(1.015)}
.zig-num{
  position:absolute;top:16px;left:16px;
  background:rgba(255,255,255,.94);color:var(--t-3);
  font-size:22px;font-weight:700;line-height:1.2;
  padding:4px 14px;border-radius:10px;
  font-variant-numeric:tabular-nums;letter-spacing:.6px;
  box-shadow:0 1px 2px rgba(15,27,38,.08);
}
.zig-body h3{max-width:520px}
.zig-body p{margin-top:14px;font-size:15.5px;line-height:1.85;color:var(--t-2);max-width:520px}
.zig-points{list-style:none;margin:20px 0 24px;display:grid;gap:10px;max-width:520px}
.zig-points li{position:relative;padding-left:20px;font-size:15px;line-height:1.8;color:var(--t-2)}
.zig-points li::before{
  content:"";position:absolute;left:0;top:9px;width:7px;height:7px;
  border-radius:999px;background:var(--c-primary-light);
}

/* ---------- Check list ---------- */
.check-wrap{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:start}
.check-intro h2{max-width:420px}
.check-intro p{margin-top:16px;font-size:15px;line-height:1.85;max-width:420px}
.check-meta{
  margin-top:24px;display:inline-flex;align-items:center;gap:10px;
  font-size:13px;color:var(--t-3);background:#fff;border:1px solid var(--line);
  border-radius:999px;padding:8px 16px;
}
.check-meta svg{color:var(--c-pos)}
.check-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.check-item{
  display:flex;align-items:flex-start;gap:12px;
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:16px 18px;box-shadow:var(--sh-1);
  font-size:15px;line-height:1.75;color:var(--t-2);
  transition:box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
}
.check-item:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#D3DDE6}
.check-item svg{flex-shrink:0;margin-top:4px;color:var(--c-primary-light)}
.check-item .idx{font-size:13px;font-weight:600;color:var(--t-3);font-variant-numeric:tabular-nums;flex-shrink:0;margin-top:2px}

/* ---------- FAQ ---------- */
.faq-card{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:8px 32px;
}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:none}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;cursor:pointer;list-style:none;
  font-size:17px;font-weight:600;line-height:1.5;color:var(--t-1);
  transition:color .2s ease-out;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--c-primary)}
.faq-item summary:focus-visible{outline:2px solid var(--c-primary-light);outline-offset:4px;border-radius:6px}
.faq-plus{
  flex-shrink:0;width:22px;height:22px;position:relative;
  transition:transform .2s ease-out;
}
.faq-plus::before,.faq-plus::after{
  content:"";position:absolute;background:var(--c-primary);border-radius:2px;
}
.faq-plus::before{top:10px;left:2px;width:18px;height:2px}
.faq-plus::after{left:10px;top:2px;width:2px;height:18px}
.faq-item[open] .faq-plus{transform:rotate(45deg)}
.faq-body{padding:0 0 22px;font-size:15px;line-height:1.9;color:var(--t-2);max-width:760px}
.faq-body p{margin-bottom:12px;max-width:100%}

/* ---------- CTA band ---------- */
.cta-band{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:56px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px}
.cta-inner h2{max-width:620px;font-size:26px}
.cta-inner p{margin-top:12px;font-size:15px;line-height:1.85;color:var(--t-2);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex-shrink:0}

/* ---------- Footer ---------- */
.site-footer{background:var(--bg-footer);color:rgba(255,255,255,.72);padding:64px 0 0;margin-top:0}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px;color:#fff}
.footer-brand .brand-mark{color:#fff}
.footer-brand .brand-text{color:#fff;font-size:18px;font-weight:700}
.footer-brand .brand-sub{color:rgba(255,255,255,.55);font-size:12px;font-weight:500}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:300px;margin-bottom:14px}
.footer-domain{font-size:13px;color:rgba(255,255,255,.42);letter-spacing:.4px;margin:0}
.site-footer h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.3px}
.footer-links{list-style:none;display:grid;gap:10px}
.footer-links li{font-size:14px;line-height:1.7;color:rgba(255,255,255,.62)}
.footer-links a{color:rgba(255,255,255,.72);transition:color .2s ease-out}
.footer-links a:hover{color:var(--c-accent)}
.footer-bottom{
  margin-top:48px;padding:22px 0;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- Responsive ---------- */
@media (max-width:1199.98px){
  h1,.page-head h1{font-size:38px}
  h2{font-size:28px}
  .zig-item{gap:40px}
  .check-wrap{gap:40px}
}
@media (max-width:991.98px){
  .main-nav{
    position:fixed;top:0;right:0;height:100vh;width:min(320px,84vw);
    background:#fff;flex-direction:column;align-items:flex-start;
    gap:6px;padding:88px 28px 40px;
    transform:translateX(100%);
    transition:transform .22s ease-out;
    box-shadow:-8px 0 32px -18px rgba(15,27,38,.35);
    z-index:1050;overflow-y:auto;
  }
  .main-nav.is-open{transform:translateX(0)}
  .main-nav .nav-link{
    display:block;width:100%;font-size:17px;font-weight:500;
    padding:14px 0;border-bottom:1px solid var(--line);
  }
  .main-nav .nav-link.active{font-weight:600}
  .main-nav .nav-link.active::after{display:none}
  .main-nav .nav-link.active::before{position:static;display:inline-block;vertical-align:2px;margin-right:8px}
  .nav-toggle{display:flex}
  .icon-btn{display:none}
  .header-actions .btn-ghost{display:none}
  body.nav-open{overflow:hidden}
  .header-inner{height:64px}
  .zig-item{grid-template-columns:1fr;gap:24px}
  .zig-item:nth-child(even) .zig-media{order:0}
  .zig-item:nth-child(even) .zig-body{order:1}
  .zig-media img{aspect-ratio:16/9}
  .zig-body h3,.zig-body p,.zig-points{max-width:100%}
  .check-wrap{grid-template-columns:1fr;gap:32px}
  .check-intro h2,.check-intro p{max-width:100%}
  .section{padding:72px 0}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:24px}
  .cta-inner h2,.cta-inner p{max-width:100%}
}
@media (max-width:767.98px){
  .container{padding-left:20px;padding-right:20px}
  h1,.page-head h1{font-size:28px;line-height:1.3}
  h2{font-size:23px}
  h3{font-size:19px}
  body{line-height:1.9}
  .page-head{padding:24px 0 32px}
  .page-lead{font-size:16px}
  .section{padding:56px 0}
  .section-head{margin-bottom:28px}
  .zig-list{gap:48px}
  .check-grid{grid-template-columns:1fr}
  .faq-card{padding:4px 20px}
  .faq-item summary{font-size:16px;padding:18px 0}
  .cta-band{padding:44px 0}
  .cta-inner h2{font-size:22px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .site-footer{padding-top:48px}
  .footer-bottom{margin-top:32px;flex-direction:column;gap:8px}
  .brand-sub{font-size:11px}
}
@media (max-width:575.98px){
  .brand-text{font-size:16px;gap:4px}
  .chip{padding:7px 14px;font-size:13px}
  .footer-desc{max-width:100%}
  .zig-num{font-size:18px;padding:3px 11px}
}

/* roulang page: category2 */
:root{
  --brand:#17395E;
  --brand-dark:#0F2A47;
  --brand-light:#2F6FA8;
  --accent:#E36A2E;
  --accent-soft:#FBEDE5;
  --ok:#1E8E6B;
  --warn:#C0492F;
  --t1:#0F1B26;
  --t2:#42525F;
  --t3:#7C8B99;
  --bg:#F6F8FA;
  --card:#FFFFFF;
  --alt:#EEF3F8;
  --footer-bg:#12293F;
  --line:#E3E8ED;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh1:0 1px 2px rgba(15,27,38,.05),0 10px 24px -14px rgba(15,27,38,.12);
  --sh2:0 2px 4px rgba(15,27,38,.06),0 18px 36px -18px rgba(23,57,94,.22);
  --bs-primary:#17395E;
  --bs-primary-rgb:23,57,94;
  --bs-body-color:#42525F;
  --bs-body-bg:#F6F8FA;
  --bs-border-color:#E3E8ED;
  --bs-border-radius:10px;
  --bs-link-color:#17395E;
  --bs-link-hover-color:#E36A2E;
  --bs-font-sans-serif:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.85;
  color:var(--t2);
  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-out;}
a:hover{color:var(--accent);}
button{font-family:inherit;}
h1,h2,h3,h4,h5{color:var(--t1);margin:0;font-weight:600;}
h1{font-size:42px;line-height:1.25;font-weight:700;letter-spacing:-.4px;}
h2{font-size:30px;line-height:1.35;font-weight:650;letter-spacing:-.2px;}
h3{font-size:22px;line-height:1.4;}
h4{font-size:18px;line-height:1.5;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand-light);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;padding-left:24px;padding-right:24px;margin:0 auto;}
.section{padding:96px 0;}
.section-alt{background:var(--alt);}
.section-white{background:var(--card);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{margin-bottom:14px;}
.section-sub{font-size:16px;line-height:1.85;color:var(--t2);}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:1050;
  background:#fff;
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 0 var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--brand);}
.brand:hover{color:var(--brand-dark);}
.brand-mark{width:24px;height:24px;flex:0 0 24px;color:var(--brand);}
.brand-text{display:inline-flex;align-items:baseline;gap:6px;font-size:18px;font-weight:700;letter-spacing:.2px;color:var(--t1);}
.brand-sub{font-size:12px;font-weight:500;color:var(--t3);letter-spacing:.4px;}
.main-nav{display:flex;align-items:center;gap:28px;}
.nav-link{
  position:relative;display:inline-block;padding:6px 0;
  font-size:15px;font-weight:500;color:var(--t2);
  transition:color .2s ease-out;
}
.nav-link:hover{color:var(--brand);}
.nav-link.active{color:var(--brand);font-weight:600;}
.nav-link.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-8px;height:2px;
  background:var(--brand);border-radius:2px;
}
.nav-link.active::before{
  content:"";position:absolute;left:-11px;top:50%;width:4px;height:4px;
  margin-top:-2px;border-radius:999px;background:var(--accent);
}
.header-actions{display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);border-radius:999px;color:var(--t2);
  transition:color .2s ease-out,border-color .2s ease-out,background-color .2s ease-out;
}
.icon-btn:hover{color:var(--brand);border-color:var(--brand-light);background:var(--alt);}
.nav-toggle{
  display:none;width:40px;height:40px;padding:0;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-btn);
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--brand);transition:transform .2s ease-out,opacity .2s ease-out;}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(6px) rotate(45deg);}
body.nav-open .nav-toggle span:nth-child(2){opacity:0;}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
body.nav-open::before{
  content:"";position:fixed;inset:0;background:rgba(15,27,38,.4);z-index:1040;
}

/* ===== Buttons ===== */
.btn{
  --bs-btn-border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1.3;
  border:1px solid transparent;box-shadow:none;
  transition:transform .2s ease-out,box-shadow .2s ease-out,background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.btn:active{transform:translateY(0) !important;}
.btn-brand{background:var(--brand);border-color:var(--brand);color:#fff;}
.btn-brand:hover{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh2);}
.btn-accent{background:var(--accent);border-color:var(--accent);color:#fff;}
.btn-accent:hover{background:#C9571F;border-color:#C9571F;color:#fff;transform:translateY(-1px);box-shadow:var(--sh2);}
.btn-ghost{background:#fff;border-color:var(--brand);color:var(--brand);}
.btn-ghost:hover{background:var(--alt);border-color:var(--brand-dark);color:var(--brand-dark);}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:9px;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;}
.link-arrow:hover{color:var(--accent);text-decoration-thickness:2px;}

/* ===== Badges & pills ===== */
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;font-size:13px;font-weight:600;color:var(--t2);
  background:#fff;border:1px solid var(--line);border-radius:999px;
}
.pill-nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.pill{
  display:inline-flex;align-items:center;padding:8px 18px;
  font-size:14px;font-weight:500;color:var(--t2);
  background:#fff;border:1px solid var(--line);border-radius:999px;
  transition:color .2s ease-out,border-color .2s ease-out,background-color .2s ease-out;
}
.pill:hover{color:var(--brand);border-color:var(--brand-light);background:var(--alt);}
.pill.active{background:var(--brand);border-color:var(--brand);color:#fff;}
.pill.active:hover{background:var(--brand-dark);color:#fff;}

/* ===== Page hero ===== */
.page-hero{background:var(--card);border-bottom:1px solid var(--line);padding:56px 0 64px;}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t3);margin-bottom:28px;flex-wrap:wrap;}
.crumb a{color:var(--t2);}
.crumb a:hover{color:var(--accent);}
.crumb-sep{color:#B9C4CE;}
.crumb-current{color:var(--t3);}
.hero-head{max-width:820px;}
.hero-head h1{margin:18px 0 16px;max-width:900px;}
.hero-lead{font-size:17px;line-height:1.8;color:var(--t2);max-width:760px;}

/* ===== Content layout ===== */
.content-wrap{padding:72px 0 96px;}
.toc{
  position:sticky;top:96px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 20px;box-shadow:var(--sh1);
}
.toc-title{font-size:13px;font-weight:600;letter-spacing:1px;color:var(--t3);margin-bottom:14px;}
.toc-link{
  position:relative;display:block;padding:9px 0 9px 16px;
  font-size:15px;color:var(--t2);border-radius:6px;
  transition:color .2s ease-out,background-color .2s ease-out;
}
.toc-link::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;
  border-radius:999px;background:transparent;transition:background-color .2s ease-out;
}
.toc-link:hover{color:var(--brand);background:#FAFBFC;}
.toc-link.active{color:var(--brand);font-weight:600;}
.toc-link.active::before{background:var(--brand);}
.toc-note{
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;line-height:1.75;color:var(--t3);
}
.content-block{margin-bottom:48px;scroll-margin-top:100px;}
.content-block h2{font-size:24px;line-height:1.4;margin-bottom:12px;padding-left:14px;position:relative;}
.content-block h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:999px;background:var(--brand);
}
.content-block p{font-size:16px;line-height:1.9;color:var(--t2);max-width:760px;margin-bottom:16px;}
.block-sub{font-size:13px;color:var(--t3);margin-bottom:16px;}
.tick-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 28px;margin-top:18px;}
.tick-list li{
  position:relative;padding-left:18px;
  font-size:15px;line-height:1.8;color:var(--t2);
}
.tick-list li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:999px;background:var(--brand-light);
}
.figure-block{
  position:relative;aspect-ratio:16/9;overflow:hidden;
  border-radius:var(--r-img);border:1px solid var(--line);
  background:#E9EEF3;margin-bottom:32px;box-shadow:var(--sh1);
}
.figure-block img{width:100%;height:100%;object-fit:cover;}
.img-fallback{position:relative;background:#E9EEF3 !important;}
.img-fallback::after{
  content:"";position:absolute;inset:0;
  background:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='48' height='48' viewBox='0 0 24 24' fill='none' stroke='%237C8B99' stroke-width='1.2'><rect x='3' y='4' width='18' height='16' rx='2'/><circle cx='8.5' cy='9.5' r='1.5'/><path d='M4 17l5-5 4 4 3-3 4 4'/></svg>") center/48px no-repeat;
}
.figcaption{font-size:13px;color:var(--t3);text-align:center;margin-top:12px;}
.alert-card{
  display:flex;gap:14px;padding:20px 22px;background:var(--accent-soft);
  border-left:3px solid var(--accent);border-radius:var(--r-card);
  font-size:15px;line-height:1.85;color:var(--t2);margin:22px 0;
}
.alert-card strong{color:var(--t1);font-weight:600;}

/* ===== Table ===== */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-card);background:#fff;box-shadow:var(--sh1);}
.data-table{width:100%;border-collapse:collapse;font-size:15px;min-width:640px;}
.data-table th,.data-table td{padding:14px 18px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;line-height:1.75;}
.data-table thead th{background:var(--alt);color:var(--t1);font-weight:600;font-size:14px;white-space:nowrap;}
.data-table tbody tr:nth-child(even){background:#FAFBFC;}
.data-table tbody tr:last-child td{border-bottom:0;}
.data-table td:first-child{color:var(--t1);font-weight:600;}

/* ===== Data strip ===== */
.data-strip{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.data-cell{padding:32px 24px;border-right:1px solid var(--line);}
.data-cell:last-child{border-right:0;}
.data-num{
  font-size:52px;line-height:1.1;font-weight:700;color:var(--brand);
  font-variant-numeric:tabular-nums;letter-spacing:-1px;
}
.data-num.accent{color:var(--accent);}
.data-num .unit{font-size:18px;font-weight:600;margin-left:4px;color:var(--t2);}
.data-label{font-size:14px;color:var(--t2);margin-top:10px;font-weight:600;}
.data-note{font-size:13px;color:var(--t3);margin-top:6px;line-height:1.7;}
.data-source{font-size:13px;color:var(--t3);margin-top:18px;}

/* ===== FAQ ===== */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-q{font-size:17px;font-weight:600;color:var(--t1);line-height:1.6;}
.faq-icon{
  position:relative;flex:0 0 18px;width:18px;height:18px;
  transition:transform .2s ease-out;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
}
.faq-icon::before{left:0;right:0;top:8px;height:2px;}
.faq-icon::after{top:0;bottom:0;left:8px;width:2px;}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-a{padding:0 0 22px;font-size:15px;line-height:1.9;color:var(--t2);max-width:760px;}
.faq-a p{margin-bottom:10px;}
.faq-a p:last-child{margin-bottom:0;}

/* ===== CTA strip ===== */
.cta-strip{background:var(--alt);padding:56px 0;}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-inner h2{font-size:26px;line-height:1.4;margin-bottom:8px;}
.cta-inner p{font-size:15px;color:var(--t2);max-width:620px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ===== Footer ===== */
.site-footer{background:var(--footer-bg);color:#C9D6E2;padding-top:72px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{color:#fff;}
.footer-brand .brand-text{color:#fff;font-size:18px;font-weight:700;}
.footer-brand .brand-sub{color:#8FA5B8;}
.footer-desc{font-size:14px;line-height:1.85;color:#A9BCCD;max-width:340px;margin-bottom:14px;}
.footer-domain{font-size:13px;color:#7E93A6;letter-spacing:.4px;}
.site-footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px;}
.footer-links li{font-size:14px;line-height:1.9;color:#A9BCCD;margin-bottom:8px;}
.footer-links li a{color:#C9D6E2;}
.footer-links li a:hover{color:var(--accent);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);margin-top:48px;padding:20px 0;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:#8FA5B8;
}

/* ===== Form control base ===== */
.form-control,.form-select{
  height:46px;border:1px solid var(--line);border-radius:var(--r-btn);
  font-size:15px;color:var(--t1);background:#fff;box-shadow:none;
}
.form-control:focus,.form-select:focus{
  border-color:var(--brand-light);box-shadow:0 0 0 3px rgba(47,111,168,.12);
}
label{font-size:14px;font-weight:600;color:var(--t1);margin-bottom:6px;display:block;}
.card{border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh1);}

/* ===== Responsive ===== */
@media (max-width:1199.98px){
  .container{max-width:1040px;}
  h1{font-size:38px;}
}
@media (max-width:991.98px){
  .nav-toggle{display:flex;}
  .main-nav{
    position:fixed;top:0;right:0;z-index:1060;
    width:300px;max-width:86vw;height:100vh;
    background:#fff;padding:92px 26px 32px;
    flex-direction:column;align-items:flex-start;gap:6px;
    transform:translateX(103%);transition:transform .22s ease-out;
    box-shadow:-12px 0 40px -20px rgba(15,27,38,.35);
    overflow-y:auto;
  }
  body.nav-open .main-nav{transform:translateX(0);}
  .nav-link{font-size:17px;padding:12px 0;width:100%;border-bottom:1px solid var(--line);}
  .nav-link.active::after{display:none;}
  .nav-link.active::before{left:0;top:22px;margin-top:0;}
  .nav-link.active{padding-left:16px;}
  .header-actions .btn-ghost{display:none;}
  .section{padding:72px 0;}
  .page-hero{padding:40px 0 48px;}
  h1{font-size:32px;}
  h2{font-size:26px;}
  .content-block h2{font-size:22px;}
  .toc{position:static;margin-bottom:32px;}
  .data-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .data-cell:nth-child(2){border-right:0;}
  .data-cell:nth-child(1),.data-cell:nth-child(2){border-bottom:1px solid var(--line);}
}
@media (max-width:767.98px){
  .container{padding-left:20px;padding-right:20px;}
  .header-inner{height:64px;}
  .brand-text{font-size:16px;}
  .brand-sub{font-size:11px;}
  h1{font-size:28px;line-height:1.35;}
  h2{font-size:23px;}
  h3{font-size:19px;}
  .section{padding:56px 0;}
  .content-wrap{padding:48px 0 64px;}
  .tick-list{grid-template-columns:minmax(0,1fr);gap:10px;}
  .data-num{font-size:40px;}
  .data-cell{padding:24px 18px;}
  .faq-q{font-size:16px;}
  .cta-inner h2{font-size:22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-bottom{flex-direction:column;}
  .site-footer{padding-top:56px;}
}
@media (max-width:575.98px){
  .main-nav{width:82vw;}
  .figure-block{aspect-ratio:4/3;}
  .data-num{font-size:34px;}
  .hero-lead{font-size:16px;}
}

/* roulang page: category3 */
:root{
  --brand:#17395E;
  --brand-dark:#0F2A47;
  --brand-light:#2F6FA8;
  --accent:#E36A2E;
  --accent-dark:#C8571F;
  --accent-soft:#FBEDE5;
  --ok:#1E8E6B;
  --warn:#C0492F;
  --ink:#0F1B26;
  --text:#42525F;
  --muted:#7C8B99;
  --bg:#F6F8FA;
  --card:#FFFFFF;
  --alt:#EEF3F8;
  --footer:#12293F;
  --line:#E3E8ED;
  --row-alt:#FAFBFC;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;
  --shadow-1:0 1px 2px rgba(15,27,38,.05), 0 10px 24px -14px rgba(15,27,38,.12);
  --shadow-2:0 2px 4px rgba(15,27,38,.06), 0 18px 36px -18px rgba(23,57,94,.22);
  --ease:cubic-bezier(.22,.61,.36,1);

  --bs-primary:#17395E;
  --bs-primary-rgb:23,57,94;
  --bs-body-color:#42525F;
  --bs-body-bg:#F6F8FA;
  --bs-border-color:#E3E8ED;
  --bs-border-radius:10px;
  --bs-border-radius-sm:8px;
  --bs-border-radius-lg:14px;
  --bs-link-color:#2F6FA8;
  --bs-link-hover-color:#E36A2E;
  --bs-font-sans-serif:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --bs-body-font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --bs-body-font-size:16px;
  --bs-body-line-height:1.85;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-light);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--accent)}
p{margin:0 0 20px}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{color:var(--ink);margin:0;line-height:1.35;letter-spacing:-.01em}
h1{font-size:42px;line-height:1.25;font-weight:700}
h2{font-size:30px;font-weight:700}
h3{font-size:22px;font-weight:600;line-height:1.4}
h4{font-size:18px;font-weight:600;line-height:1.5}
::selection{background:rgba(227,106,46,.18);color:var(--ink)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand-light);
  outline-offset:2px;
}

.container{max-width:1200px;padding-left:24px;padding-right:24px;margin:0 auto}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-stuck{box-shadow:0 1px 0 var(--line),0 8px 24px -20px rgba(15,27,38,.4)}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:28px;height:72px;
}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--ink);font-size:18px;font-weight:700;white-space:nowrap;
  transition:color .18s var(--ease);
}
.brand:hover{color:var(--brand)}
.brand-mark{width:24px;height:24px;flex:none;color:var(--brand)}
.brand-text{display:inline-flex;align-items:baseline;gap:0}
.brand-sub{
  font-size:12px;font-weight:500;color:var(--muted);
  margin-left:6px;letter-spacing:.02em;
}
.main-nav{display:flex;align-items:center;gap:28px}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 0 8px;
  font-size:15px;font-weight:500;color:var(--text);
  transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--brand);border-radius:2px;
  transform:scaleX(0);transform-origin:left center;
  transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{transform:scaleX(.45)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.nav-link.active::before{
  content:"";position:absolute;left:-11px;top:calc(50% - 8px);
  width:4px;height:4px;border-radius:999px;background:var(--accent);
}
.header-actions{display:flex;align-items:center;gap:12px;flex:none}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1.4;
  padding:13px 26px;
  border:1px solid transparent;
  cursor:pointer;text-decoration:none;
  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:focus-visible{outline:2px solid var(--brand-light);outline-offset:2px}
.btn-solid{background:var(--brand);color:#fff}
.btn-solid:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-solid:active{transform:translateY(0);box-shadow:var(--shadow-1)}
.btn-ghost{background:#fff;border-color:var(--brand);color:var(--brand)}
.btn-ghost:hover{background:var(--alt);color:var(--brand-dark);border-color:var(--brand-dark)}
.btn-cta{background:var(--accent);color:#fff}
.btn-cta:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-cta:active{transform:translateY(0)}
.btn-sm{padding:9px 18px;font-size:14px}
.icon-btn{
  width:38px;height:38px;flex:none;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--text);
  cursor:pointer;transition:all .18s var(--ease);
}
.icon-btn:hover{border-color:var(--brand-light);color:var(--brand);background:var(--alt)}
.nav-toggle{
  display:none;width:38px;height:38px;border:1px solid var(--line);border-radius:10px;
  background:#fff;padding:0;cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.nav-toggle span{display:block;width:16px;height:1.6px;background:var(--brand);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5.6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.6px) rotate(-45deg)}
.nav-mask{
  position:fixed;inset:0;background:rgba(15,27,38,.4);z-index:1035;
  opacity:0;transition:opacity .2s var(--ease);
}
.nav-mask[hidden]{display:none}

/* ============ crumbs ============ */
.crumbs{padding:22px 0 0;font-size:13px;color:var(--muted);line-height:1.7}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.crumbs li{display:inline-flex;align-items:center;min-width:0}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{margin:0 8px;color:#C3CCD5}
.crumbs .now{color:var(--text);overflow:hidden;text-overflow:ellipsis}

/* ============ hero ============ */
.page-hero{padding:34px 0 62px}
.hero-grid{
  display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:56px;align-items:center;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--brand-light);
  margin-bottom:16px;
}
.eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--accent)}
.hero-lead{margin-top:20px;font-size:16px;line-height:1.9;color:var(--text);max-width:600px}
.chip-nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.chip{
  display:inline-flex;align-items:center;
  padding:8px 16px;border-radius:999px;
  border:1px solid var(--line);background:#fff;
  font-size:14px;font-weight:500;color:var(--text);
  transition:all .18s var(--ease);
}
.chip:hover{border-color:var(--brand-light);color:var(--brand);background:var(--alt);transform:translateY(-1px)}
.hero-figure{
  border-radius:var(--r-img);overflow:hidden;
  background:#E8EDF2;box-shadow:var(--shadow-2);
  aspect-ratio:4/3;
}
.hero-figure img{width:100%;height:100%;object-fit:cover}

/* ============ section basic ============ */
.section{padding:96px 0}
.section-alt{background:var(--alt)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{margin-bottom:14px}
.section-desc{font-size:16px;line-height:1.9;color:var(--text);margin:0}

/* ============ timeline ============ */
.timeline{position:relative;padding-left:0;max-width:900px}
.timeline::before{
  content:"";position:absolute;left:11px;top:10px;bottom:10px;
  width:1px;background:var(--line);
}
.step{position:relative;padding:0 0 40px 56px}
.step:last-child{padding-bottom:0}
.step-dot{
  position:absolute;left:0;top:0;
  width:24px;height:24px;border-radius:999px;
  display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);
  font-size:11px;font-weight:700;color:var(--muted);
  font-variant-numeric:tabular-nums;
  transition:all .2s var(--ease);
}
.step.is-current .step-dot{
  background:var(--accent);border-color:var(--accent);color:#fff;
  box-shadow:0 0 0 5px rgba(227,106,46,.14);
}
.step-body{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);padding:26px 28px;
  box-shadow:var(--shadow-1);
  transition:box-shadow .2s var(--ease),transform .2s var(--ease);
}
.step-body:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.step-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:10px}
.step-head h3{margin:0}
.tag{
  display:inline-flex;align-items:center;
  padding:4px 12px;border-radius:999px;
  background:var(--alt);color:var(--text);
  font-size:13px;font-weight:500;white-space:nowrap;
  font-variant-numeric:tabular-nums;
}
.tag-accent{background:var(--accent-soft);color:#9C421B}
.step-body p{font-size:15px;line-height:1.85;color:var(--text);margin:0}

/* ============ prepare ============ */
.prepare-title{margin-bottom:14px}
.prepare-note{font-size:15px;line-height:1.9;color:var(--text)}
.check-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px 32px}
.check-list li{
  display:flex;gap:14px;align-items:flex-start;
  padding:22px 24px;
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-1);
  transition:box-shadow .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease);
}
.check-list li:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);border-color:#D5DEE7}
.check-num{
  flex:none;width:30px;height:30px;border-radius:9px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--alt);color:var(--brand);
  font-size:12px;font-weight:700;font-variant-numeric:tabular-nums;
}
.check-list h4{margin:0 0 4px;font-size:16px}
.check-list p{margin:0;font-size:14px;line-height:1.8;color:var(--text)}

/* ============ timing rows ============ */
.time-rows{border-top:1px solid var(--line);max-width:940px}
.time-row{
  display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,2fr) auto;
  gap:24px;align-items:center;
  padding:20px 4px;border-bottom:1px solid var(--line);
  transition:background-color .18s var(--ease);
}
.time-row:hover{background:rgba(255,255,255,.6)}
.time-name{font-size:16px;font-weight:600;color:var(--ink)}
.time-note{font-size:14px;color:var(--muted);line-height:1.75}
.time-dur{
  font-size:15px;font-weight:700;color:var(--brand);
  font-variant-numeric:tabular-nums;white-space:nowrap;
  border-bottom:2px solid var(--accent);padding-bottom:1px;
}

/* ============ hint cards ============ */
.hint-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.hint-card{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);padding:28px;
  box-shadow:var(--shadow-1);
  transition:box-shadow .2s var(--ease),transform .2s var(--ease);
}
.hint-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.hint-card h3{font-size:18px;margin-bottom:10px}
.hint-card p{font-size:15px;line-height:1.85;color:var(--text);margin:0}

/* ============ faq ============ */
.faq{max-width:940px}
.faq .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.faq .accordion-item:first-child{border-top:1px solid var(--line)}
.faq .accordion-button{
  background:transparent;box-shadow:none;
  padding:20px 0;font-size:17px;font-weight:600;color:var(--ink);
  gap:16px;line-height:1.6;
}
.faq .accordion-button:not(.collapsed){color:var(--brand);background:transparent;box-shadow:none}
.faq .accordion-button:focus{box-shadow:none;outline:2px solid var(--brand-light);outline-offset:2px;border-radius:6px}
.faq .accordion-button::after{
  width:18px;height:18px;flex:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2342525F' stroke-width='1.8' stroke-linecap='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E");
  background-size:18px 18px;background-position:center;
  transform:none;
  transition:transform .2s var(--ease);
}
.faq .accordion-button:not(.collapsed)::after{
  transform:rotate(45deg);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2317395E' stroke-width='1.8' stroke-linecap='round'%3E%3Cpath d='M12 5v14M5 12h14'/%3E%3C/svg%3E");
}
.faq .accordion-body{padding:0 0 22px;font-size:15px;line-height:1.9;color:var(--text)}
.faq .accordion-body p{margin:0}

/* ============ cta band ============ */
.cta-band{background:var(--alt);padding:64px 0;border-top:1px solid var(--line)}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta-inner h2{font-size:26px;margin-bottom:8px}
.cta-inner p{margin:0;font-size:15px;line-height:1.85;color:var(--text);max-width:640px}

/* ============ footer ============ */
.site-footer{background:var(--footer);color:#C6D2DD;padding:72px 0 0;font-size:14px}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:16px;font-weight:600}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:18px;font-weight:700;margin-bottom:18px}
.footer-brand .brand-mark{color:#7FB0DC}
.footer-brand .brand-sub{color:#93A7BA}
.footer-desc{font-size:14px;line-height:1.85;color:#A9B9C8;margin:0 0 12px;max-width:340px}
.footer-domain{font-size:13px;color:#7F93A6;margin:0;letter-spacing:.02em}
.footer-links{list-style:none;margin:0;padding:0}
.footer-links li{margin-bottom:10px;font-size:14px;line-height:1.7;color:#A9B9C8}
.footer-links a{color:#C6D2DD;transition:color .18s var(--ease)}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{
  margin-top:56px;padding:22px 0;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#8FA3B6;
}

/* ============ responsive ============ */
@media (max-width:1199.98px){
  h1{font-size:38px}
  .hero-grid{gap:40px}
}
@media (max-width:991.98px){
  .header-inner{height:68px;gap:16px}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;z-index:1040;
    width:min(320px,86vw);
    background:#fff;
    flex-direction:column;align-items:flex-start;justify-content:flex-start;
    gap:2px;
    padding:92px 28px 32px;
    box-shadow:-24px 0 48px -28px rgba(15,27,38,.5);
    transform:translateX(100%);
    transition:transform .22s var(--ease);
    overflow-y:auto;
  }
  .main-nav.open{transform:translateX(0)}
  .nav-link{display:block;width:100%;font-size:17px;padding:13px 0;border-bottom:1px solid var(--line)}
  .nav-link::after{display:none}
  .nav-link.active::before{left:-14px;top:calc(50% - 3px)}
  .nav-toggle{display:inline-flex}
  .header-actions .btn{display:none}
  .nav-mask[hidden]{display:none}
  .nav-mask{display:block}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:36px}
  .hero-figure{aspect-ratio:16/9}
  .section{padding:72px 0}
  h1{font-size:32px}
  h2{font-size:26px}
  .cta-inner h2{font-size:23px}
}
@media (max-width:767.98px){
  .container{padding-left:20px;padding-right:20px}
  .section{padding:56px 0}
  .page-hero{padding:26px 0 44px}
  h1{font-size:28px;line-height:1.3}
  h2{font-size:23px}
  h3{font-size:19px}
  .hero-lead{font-size:16px;line-height:1.9}
  .chip-nav{gap:8px;margin-top:24px}
  .chip{padding:7px 14px;font-size:13px}
  .step{padding-left:44px}
  .step-body{padding:22px 20px}
  .check-list{grid-template-columns:minmax(0,1fr);gap:16px}
  .hint-grid{grid-template-columns:minmax(0,1fr);gap:16px}
  .time-row{grid-template-columns:minmax(0,1fr);gap:6px;padding:18px 2px}
  .time-note{font-size:13px}
  .cta-band{padding:48px 0}
  .cta-inner{gap:24px}
  .site-footer{padding-top:56px}
  .footer-bottom{margin-top:40px;flex-direction:column;gap:8px}
  .section-head{margin-bottom:28px}
}
@media (max-width:575.98px){
  .brand{font-size:16px}
  .brand-sub{font-size:11px;margin-left:4px}
  .hero-figure{aspect-ratio:4/3}
  .step-head{gap:10px}
  .btn{width:100%;padding:13px 20px}
  .btn-sm{width:auto}
  .cta-inner .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none !important;animation:none !important}
}

/* roulang page: category4 */
:root{
  --brand-900:#0F2A47;
  --brand-700:#17395E;
  --brand-500:#2F6FA8;
  --accent:#E36A2E;
  --accent-soft:#FBEDE5;
  --pos:#1E8E6B;
  --neg:#C0492F;
  --ink:#0F1B26;
  --body:#42525F;
  --muted:#7C8B99;
  --bg:#F6F8FA;
  --surface:#FFFFFF;
  --band:#EEF3F8;
  --footer-bg:#12293F;
  --line:#E3E8ED;
  --row-alt:#FAFBFC;
  --bar-idle:#C7D2DC;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;
  --sh-1:0 1px 2px rgba(15,27,38,.05), 0 10px 24px -14px rgba(15,27,38,.12);
  --sh-2:0 2px 4px rgba(15,27,38,.06), 0 18px 36px -18px rgba(23,57,94,.22);
  --bs-primary:#17395E;
  --bs-body-color:#42525F;
  --bs-body-bg:#F6F8FA;
  --bs-border-radius:10px;
  --bs-border-color:#E3E8ED;
  --bs-link-color:#17395E;
  --bs-link-hover-color:#0F2A47;
  --bs-font-sans-serif:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--body);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-700);text-decoration:none;}
a:hover{color:var(--brand-900);}
h1,h2,h3,h4,h5{color:var(--ink);margin:0;font-weight:650;letter-spacing:.2px;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px;}
.skip-link{
  position:absolute;left:-9999px;top:0;background:var(--brand-700);color:#fff;
  padding:10px 18px;border-radius:0 0 var(--r-btn) 0;z-index:2000;
}
.skip-link:focus{left:0;color:#fff;}

/* ---------- layout ---------- */
.container{max-width:1200px;padding-left:24px;padding-right:24px;}
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap;}
.section-head h2{font-size:30px;line-height:1.35;}
.section-head .sub{font-size:15px;color:var(--muted);margin-top:10px;max-width:640px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:1px;color:var(--brand-500);font-weight:600;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);display:inline-block;}
.prose{max-width:760px;}
.text-link{
  color:var(--brand-700);font-weight:600;text-decoration:underline;
  text-underline-offset:4px;text-decoration-thickness:1px;
  transition:color .2s ease-out,text-decoration-thickness .2s ease-out;
}
.text-link:hover{color:var(--accent);text-decoration-thickness:2px;}

/* ---------- buttons ---------- */
.btn{
  --btn-bg:var(--brand-700);
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1.2;
  padding:13px 26px;border-radius:var(--r-btn);border:1px solid transparent;
  transition:background-color .2s ease-out,color .2s ease-out,transform .18s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  cursor:pointer;
}
.btn-primary{background:var(--brand-700);color:#fff;border-color:var(--brand-700);}
.btn-primary:hover{background:var(--brand-900);border-color:var(--brand-900);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1);}
.btn-ghost{background:#fff;color:var(--brand-700);border:1px solid var(--brand-700);}
.btn-ghost:hover{background:var(--band);color:var(--brand-900);border-color:var(--brand-900);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn-accent{background:var(--accent);color:#fff;border-color:var(--accent);}
.btn-accent:hover{background:#C9581F;border-color:#C9581F;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-accent:active{transform:translateY(0);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-block{width:100%;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease-out;
}
.site-header.is-scrolled{box-shadow:0 1px 0 var(--line),0 6px 18px -14px rgba(23,57,94,.35);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--brand-700);}
.brand-mark{width:24px;height:24px;flex:0 0 24px;color:var(--brand-700);}
.brand-text{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:.4px;display:inline-flex;align-items:baseline;gap:6px;}
.brand-sub{font-size:12px;font-weight:500;color:var(--muted);letter-spacing:.5px;}
.main-nav{display:flex;align-items:center;}
.main-nav .nav-link{
  position:relative;display:inline-block;
  font-size:15px;font-weight:500;color:var(--body);
  padding:6px 0;margin:0 15px;white-space:nowrap;
  transition:color .18s ease-out;
}
.main-nav .nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-8px;height:2px;
  background:var(--brand-700);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease-out;
}
.main-nav .nav-link:hover{color:var(--brand-700);}
.main-nav .nav-link.active{color:var(--brand-700);font-weight:600;}
.main-nav .nav-link.active::after{transform:scaleX(1);}
.main-nav .nav-link.active::before{
  content:"";position:absolute;left:-11px;top:50%;width:4px;height:4px;border-radius:999px;
  background:var(--accent);transform:translateY(-50%);
}
.header-actions{display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);border-radius:999px;color:var(--brand-500);
  transition:color .18s ease-out,border-color .18s ease-out,background-color .18s ease-out;
}
.icon-btn:hover{color:var(--brand-900);border-color:var(--brand-500);background:var(--band);}
.nav-toggle{
  display:none;width:40px;height:40px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-btn);padding:0;position:relative;
}
.nav-toggle span{
  display:block;width:18px;height:2px;margin:4px auto;background:var(--brand-700);border-radius:2px;
  transition:transform .2s ease-out,opacity .2s ease-out;
}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(6px) rotate(45deg);}
body.nav-open .nav-toggle span:nth-child(2){opacity:0;}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.nav-mask{
  position:fixed;inset:0;background:#fff;opacity:0;pointer-events:none;
  transition:opacity .2s ease-out;z-index:1035;
}
body.nav-open .nav-mask{opacity:.4;pointer-events:auto;}

/* ---------- breadcrumb ---------- */
.crumb-bar{background:#fff;border-bottom:1px solid var(--line);}
.crumb{
  display:flex;align-items:center;gap:10px;flex-wrap:nowrap;overflow:hidden;
  font-size:13px;color:var(--muted);padding:14px 0;white-space:nowrap;
}
.crumb a{color:var(--body);}
.crumb a:hover{color:var(--brand-700);text-decoration:underline;text-underline-offset:3px;}
.crumb .sep{color:#B9C4CE;}
.crumb .current{color:var(--brand-700);font-weight:600;overflow:hidden;text-overflow:ellipsis;}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;padding:76px 0 68px;
  background-color:#fff;
  background-image:linear-gradient(180deg,rgba(255,255,255,.94) 0%,rgba(255,255,255,.97) 60%,#fff 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero h1{font-size:42px;line-height:1.25;max-width:880px;}
.page-hero .lead{
  font-size:17px;line-height:1.8;color:var(--body);max-width:680px;margin-top:20px;
}
.chip-nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px;}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;border-radius:999px;border:1px solid var(--line);
  background:#fff;color:var(--body);font-size:14px;font-weight:500;
  transition:color .18s ease-out,border-color .18s ease-out,background-color .18s ease-out,transform .18s ease-out;
}
.chip:hover{color:var(--brand-900);border-color:var(--brand-500);background:var(--band);transform:translateY(-1px);}
.chip.is-active{background:var(--brand-700);border-color:var(--brand-700);color:#fff;}
.chip.is-active:hover{background:var(--brand-900);border-color:var(--brand-900);color:#fff;}
.chip .dot{width:6px;height:6px;border-radius:999px;background:var(--accent);display:inline-block;}
.chip.is-active .dot{background:#fff;}

/* ---------- case grid ---------- */
.case-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
.case-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
  transition:box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
  display:flex;flex-direction:column;
}
.case-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);border-color:#D6DEE6;}
.case-media{
  position:relative;overflow:hidden;background:#EDF1F5;
  aspect-ratio:16/9;
}
.case-media.is-tall{aspect-ratio:4/3;}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform .28s ease-out;}
.case-card:hover .case-media img{transform:scale(1.02);}
.case-media .media-tag{
  position:absolute;left:14px;top:14px;
  background:rgba(255,255,255,.94);color:var(--brand-700);
  font-size:12px;font-weight:600;padding:5px 12px;border-radius:999px;
  border:1px solid var(--line);letter-spacing:.3px;
}
.case-body{padding:24px 26px 26px;display:flex;flex-direction:column;gap:12px;flex:1;}
.case-body h3{font-size:20px;line-height:1.45;}
.case-body .desc{font-size:15px;line-height:1.8;color:var(--body);}
.case-foot{margin-top:auto;padding-top:14px;display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;}
.stat-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--accent-soft);color:#A8471B;
  font-size:13px;font-weight:600;padding:6px 12px;border-radius:999px;
  font-variant-numeric:tabular-nums;
}
.stat-badge.is-pos{background:#E8F4F0;color:var(--pos);}
.badge-soft{
  display:inline-flex;align-items:center;
  background:var(--row-alt);border:1px solid var(--line);color:var(--body);
  font-size:12px;padding:4px 10px;border-radius:999px;
}
.meta-line{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;}

/* ---------- band / compare ---------- */
.band{background:var(--band);}
.compare-wrap{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
.compare-panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:30px 28px;box-shadow:var(--sh-1);
}
.compare-panel .panel-title{
  display:flex;align-items:center;justify-content:space-between;
  font-size:15px;font-weight:600;color:var(--ink);margin-bottom:22px;
}
.compare-panel .panel-title span.k{font-size:13px;font-weight:500;color:var(--muted);}
.metric-row{margin-bottom:20px;}
.metric-row:last-child{margin-bottom:0;}
.metric-row .mrow-top{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:8px;}
.metric-row .mname{font-size:14px;color:var(--body);}
.metric-row .mval{font-size:15px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums;}
.bar-track{height:6px;border-radius:999px;background:#EFF3F6;overflow:hidden;}
.bar-fill{height:100%;border-radius:999px;background:var(--bar-idle);transition:width .4s ease-out;}
.bar-fill.is-pos{background:var(--pos);}
.bar-fill.is-warn{background:var(--neg);}
.compare-note{font-size:13px;color:var(--muted);margin-top:22px;}

/* ---------- method ---------- */
.method-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.method-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--sh-1);
  transition:box-shadow .2s ease-out,transform .2s ease-out;
}
.method-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.method-num{
  font-size:32px;font-weight:700;color:#C9D6E1;font-variant-numeric:tabular-nums;
  line-height:1;margin-bottom:14px;letter-spacing:1px;
}
.method-card h3{font-size:18px;margin-bottom:10px;}
.method-card p{font-size:15px;line-height:1.8;}

/* ---------- faq ---------- */
.faq-list{max-width:920px;}
.accordion-item{background:transparent;border:0;border-top:1px solid var(--line);}
.accordion-item:last-child{border-bottom:1px solid var(--line);}
.accordion-button{
  background:transparent;box-shadow:none;color:var(--ink);
  font-size:17px;font-weight:600;line-height:1.6;padding:20px 44px 20px 0;
}
.accordion-button:not(.collapsed){color:var(--brand-700);background:transparent;box-shadow:none;}
.accordion-button:focus{box-shadow:none;border-color:transparent;}
.accordion-button:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;}
.accordion-button::after{
  width:12px;height:12px;margin-left:auto;
  background-image:none;border-right:2px solid var(--brand-500);border-bottom:2px solid var(--brand-500);
  transform:rotate(45deg) translateY(-2px);transition:transform .2s ease-out;flex:0 0 12px;
}
.accordion-button:not(.collapsed)::after{transform:rotate(-135deg) translateY(-2px);}
.accordion-body{
  font-size:15px;line-height:1.9;color:var(--body);
  padding:0 44px 22px 0;
}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--band);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:56px 0;
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-inner h2{font-size:26px;line-height:1.4;margin-bottom:10px;}
.cta-inner p{font-size:15px;color:var(--body);max-width:640px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{background:var(--footer-bg);color:#C6D2DD;padding:72px 0 0;}
.site-footer h4{color:#fff;font-size:16px;font-weight:600;margin-bottom:18px;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;}
.site-footer .brand-mark{color:#8FB6D6;}
.site-footer .brand-text{color:#fff;}
.site-footer .brand-sub{color:#8FA5B8;}
.footer-desc{font-size:14px;line-height:1.85;color:#A9BAC9;max-width:340px;}
.footer-domain{font-size:13px;color:#7E96AA;margin-top:14px;letter-spacing:.6px;}
.footer-links li{font-size:14px;line-height:2.1;color:#A9BAC9;}
.footer-links a{color:#C6D2DD;transition:color .18s ease-out;}
.footer-links a:hover{color:var(--accent);}
.footer-bottom{
  margin-top:56px;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:#8FA5B8;
}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .page-hero h1{font-size:38px;}
}
@media (max-width:991.98px){
  .section{padding:72px 0;}
  .page-hero{padding:56px 0 52px;}
  .page-hero h1{font-size:32px;}
  .header-actions .btn-ghost{display:none;}
  .nav-toggle{display:inline-block;}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;width:300px;max-width:84vw;
    background:#fff;flex-direction:column;align-items:flex-start;
    padding:88px 28px 32px;gap:4px;
    transform:translateX(100%);transition:transform .24s ease-out;
    z-index:1040;box-shadow:-24px 0 48px -32px rgba(15,27,38,.4);overflow-y:auto;
  }
  body.nav-open .main-nav{transform:translateX(0);}
  .main-nav .nav-link{font-size:17px;font-weight:600;margin:0;padding:12px 0;width:100%;border-bottom:1px solid var(--line);}
  .main-nav .nav-link::after{display:none;}
  .main-nav .nav-link.active::before{display:none;}
  .main-nav .nav-link.active{color:var(--accent);}
  .case-grid{gap:24px;}
  .compare-wrap{grid-template-columns:1fr;}
  .method-grid{grid-template-columns:1fr 1fr;gap:20px;}
}
@media (max-width:767.98px){
  .container{padding-left:20px;padding-right:20px;}
  .section{padding:56px 0;}
  .section-tight{padding:48px 0;}
  .section-head{margin-bottom:28px;gap:14px;}
  .section-head h2{font-size:23px;}
  .page-hero{padding:44px 0 40px;}
  .page-hero h1{font-size:28px;line-height:1.32;}
  .page-hero .lead{font-size:16px;line-height:1.9;margin-top:16px;}
  .chip-nav{margin-top:24px;gap:8px;}
  .chip{font-size:13px;padding:7px 14px;}
  .case-grid{grid-template-columns:1fr;}
  .method-grid{grid-template-columns:1fr;}
  .case-body{padding:20px 20px 22px;}
  .case-body h3{font-size:18px;}
  .compare-panel{padding:24px 20px;}
  .cta-band{padding:44px 0;}
  .cta-inner h2{font-size:22px;}
  .cta-actions .btn{width:100%;}
  .site-footer{padding-top:56px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .accordion-button{font-size:16px;padding-right:36px;}
  .accordion-body{padding-right:0;}
}
@media (max-width:575.98px){
  .brand-text{font-size:16px;}
  .brand-sub{font-size:11px;}
  .crumb{font-size:12px;gap:8px;}
  .stat-badge{font-size:12px;padding:5px 10px;}
  .case-foot{gap:10px;}
}

/* roulang page: category5 */
:root{
  --bs-primary:#17395E;
  --bs-body-color:#42525F;
  --bs-body-bg:#F6F8FA;
  --bs-border-radius:14px;
  --bs-border-color:#E3E8ED;
  --bs-link-color:#17395E;
  --bs-link-hover-color:#0F2A47;
  --bs-font-sans-serif:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;

  --ink-900:#0F1B26;
  --ink-700:#42525F;
  --ink-500:#7C8B99;
  --primary:#17395E;
  --primary-dark:#0F2A47;
  --primary-light:#2F6FA8;
  --accent:#E36A2E;
  --accent-soft:#FBEDE5;
  --ok:#1E8E6B;
  --warn:#C0492F;
  --bg:#F6F8FA;
  --surface:#FFFFFF;
  --band:#EEF3F8;
  --line:#E3E8ED;
  --footer-bg:#12293F;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;
  --shadow-1:0 1px 2px rgba(15,27,38,.05),0 10px 24px -14px rgba(15,27,38,.12);
  --shadow-2:0 2px 4px rgba(15,27,38,.06),0 18px 36px -18px rgba(23,57,94,.22);
  --shadow-nav:0 1px 0 #E3E8ED;
  --font-sans:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;text-underline-offset:4px;transition:color .18s ease-out}
a:hover{color:var(--primary-dark)}
button{font-family:inherit}
h1,h2,h3,h4{color:var(--ink-900);margin:0;font-weight:650;letter-spacing:.2px}
h1{font-size:42px;line-height:1.25;font-weight:700}
h2{font-size:30px;line-height:1.35}
h3{font-size:22px;line-height:1.4;font-weight:600}
h4{font-size:18px;line-height:1.5;font-weight:600}
p{margin:0 0 20px}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary-light);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}

/* ---------- 按钮 ---------- */
.btn{
  --bs-btn-focus-box-shadow:0 0 0 3px rgba(47,111,168,.25);
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;font-size:15px;font-weight:600;line-height:1.4;
  border-radius:var(--r-btn);border:1px solid transparent;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
  text-decoration:none;
}
.btn-primary{
  background:var(--primary);color:#fff;border-color:var(--primary);
}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-outline{
  background:#fff;color:var(--primary);border-color:var(--primary);
}
.btn-outline:hover{background:var(--band);color:var(--primary-dark);border-color:var(--primary-dark)}
.btn-accent{
  background:var(--accent);color:#fff;border-color:var(--accent);
}
.btn-accent:hover{background:#C9561F;border-color:#C9561F;color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-ghost{background:transparent;color:var(--primary);border-color:var(--primary);border-radius:var(--r-btn)}
.btn-ghost:hover{background:var(--band);color:var(--primary-dark);border-color:var(--primary-dark)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--primary);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px}
.link-arrow:hover{color:var(--accent);text-decoration-thickness:2px}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;background:#fff;
  box-shadow:var(--shadow-nav);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  height:72px;
}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink-900);text-decoration:none}
.brand:hover{color:var(--ink-900)}
.brand-mark{width:24px;height:24px;color:var(--primary);flex:0 0 auto}
.brand-text{font-size:17px;font-weight:700;line-height:1.2;display:inline-flex;align-items:baseline;gap:6px;letter-spacing:.3px}
.brand-sub{font-size:12px;font-weight:500;color:var(--ink-500);letter-spacing:.4px}

.main-nav{display:flex;align-items:center;gap:30px}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-700);
  padding:6px 0;text-decoration:none;transition:color .18s ease-out;white-space:nowrap;
}
.nav-link::before{
  content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%) scale(0);
  width:4px;height:4px;border-radius:999px;background:var(--accent);transition:transform .18s ease-out;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:-2px;height:2px;width:100%;
  background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .18s ease-out;
}
.nav-link:hover{color:var(--primary)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--primary);font-weight:600}
.nav-link.active::before{transform:translateY(-50%) scale(1)}
.nav-link.active::after{transform:scaleX(1)}

.header-actions{display:flex;align-items:center;gap:12px}
.icon-btn{
  width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--ink-700);
  transition:border-color .18s ease-out,color .18s ease-out,background-color .18s ease-out;
}
.icon-btn:hover{color:var(--primary);border-color:var(--primary-light);background:var(--band)}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:#fff;padding:9px 8px;flex-direction:column;justify-content:space-between;
  transition:border-color .18s ease-out;
}
.nav-toggle span{display:block;height:2px;border-radius:999px;background:var(--ink-900);transition:transform .2s ease-out,opacity .2s ease-out}
.nav-toggle:hover{border-color:var(--primary-light)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.nav-scrim{
  position:fixed;inset:0;background:rgba(15,27,38,.4);opacity:0;visibility:hidden;
  transition:opacity .2s ease-out,visibility .2s ease-out;z-index:1035;
}
.nav-scrim.show{opacity:1;visibility:visible}
body.nav-lock{overflow:hidden}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:22px 0 0}
.crumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:var(--ink-500)}
.crumb a{color:var(--ink-500);text-decoration:none}
.crumb a:hover{color:var(--primary)}
.crumb .sep{color:#B9C4CE}
.crumb .current{color:var(--ink-700);font-weight:600}

/* ---------- 顶部区 ---------- */
.page-hero{padding:40px 0 64px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:56px;align-items:center}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:var(--accent-soft);color:#A54A18;font-size:13px;font-weight:600;margin-bottom:18px;
}
.hero-tag::before{content:"";width:6px;height:6px;border-radius:999px;background:var(--accent)}
.page-hero h1{margin-bottom:18px}
.hero-lead{font-size:16px;line-height:1.9;color:var(--ink-700);max-width:620px;margin-bottom:26px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:9px 16px;border-radius:999px;border:1px solid var(--line);background:#fff;
  font-size:13px;color:var(--ink-700);font-weight:500;text-decoration:none;
  transition:border-color .18s ease-out,color .18s ease-out,background-color .18s ease-out,transform .18s ease-out;
}
.chip:hover{color:var(--primary);border-color:var(--primary-light);background:var(--band);transform:translateY(-1px)}
.hero-media{border-radius:var(--r-img);overflow:hidden;box-shadow:var(--shadow-2);background:#DFE7EE;aspect-ratio:4/3}
.hero-media img{width:100%;height:100%;object-fit:cover}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section-band{background:var(--band)}
.section-head{margin-bottom:40px;display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.section-head h2{margin-bottom:8px}
.section-head .sub{font-size:15px;color:var(--ink-500);margin:0;max-width:720px}

/* ---------- 筛选胶囊 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:36px}
.filter-pill{
  padding:10px 20px;border-radius:999px;border:1px solid var(--line);background:#fff;
  color:var(--ink-700);font-size:14px;font-weight:600;cursor:pointer;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out;
}
.filter-pill:hover{border-color:var(--primary-light);color:var(--primary);transform:translateY(-1px)}
.filter-pill.is-active{background:var(--primary);border-color:var(--primary);color:#fff}
.filter-pill.is-active:hover{background:var(--primary-dark);border-color:var(--primary-dark);color:#fff}

/* ---------- FAQ 两列 ---------- */
.faq-cols{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 56px;align-items:start}
.faq-col{display:flex;flex-direction:column}
.faq-group-label{
  font-size:13px;font-weight:600;color:var(--ink-500);letter-spacing:.6px;
  padding:0 0 14px;border-bottom:1px solid var(--line);margin-bottom:4px;
}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:flex-start;gap:14px;text-align:left;
  background:transparent;border:0;padding:20px 0;cursor:pointer;color:var(--ink-900);
  transition:color .18s ease-out;
}
.faq-q:hover{color:var(--primary)}
.faq-num{
  flex:0 0 auto;font-size:13px;font-weight:600;color:var(--ink-500);
  font-variant-numeric:tabular-nums;padding-top:2px;min-width:24px;
}
.faq-title{flex:1 1 auto;font-size:17px;font-weight:600;line-height:1.55}
.faq-arrow{
  flex:0 0 auto;width:18px;height:18px;margin-top:3px;position:relative;
  transition:transform .2s ease-out;
}
.faq-arrow::before,.faq-arrow::after{
  content:"";position:absolute;background:var(--ink-500);border-radius:999px;
}
.faq-arrow::before{left:0;top:8px;width:18px;height:2px}
.faq-arrow::after{left:8px;top:0;width:2px;height:18px;transition:opacity .2s ease-out}
.faq-item.open .faq-arrow{transform:rotate(90deg)}
.faq-item.open .faq-arrow::before{background:var(--primary)}
.faq-item.open .faq-arrow::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease-out}
.faq-a-inner{padding:0 0 22px 38px;font-size:15px;line-height:1.9;color:var(--ink-700)}
.faq-a-inner p{margin:0 0 12px}
.faq-a-inner p:last-child{margin-bottom:0}
.faq-item.is-hidden{display:none}

/* ---------- 自查步骤条 ---------- */
.steps-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.step-cell{padding:32px 28px 32px 0;position:relative}
.step-cell + .step-cell{padding-left:28px;border-left:1px solid var(--line)}
.step-no{font-size:13px;font-weight:600;color:var(--accent);font-variant-numeric:tabular-nums;letter-spacing:.6px}
.step-cell h3{font-size:18px;margin:10px 0 8px}
.step-cell p{font-size:14px;line-height:1.8;color:var(--ink-700);margin:0}

/* ---------- 相关分区链接 ---------- */
.related-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px}
.related-link{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 22px;border-radius:var(--r-card);border:1px solid var(--line);background:#fff;
  font-size:15px;font-weight:600;color:var(--ink-900);text-decoration:none;box-shadow:var(--shadow-1);
  transition:box-shadow .18s ease-out,transform .18s ease-out,border-color .18s ease-out,color .18s ease-out;
}
.related-link:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);border-color:var(--primary-light);color:var(--primary)}
.related-link .dot{width:6px;height:6px;border-radius:999px;background:var(--accent)}

/* ---------- 转化条 ---------- */
.cta-band{padding:56px 0}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:40px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:40px 44px;box-shadow:var(--shadow-1);
}
.cta-inner h2{font-size:24px;margin-bottom:8px}
.cta-inner p{font-size:15px;color:var(--ink-700);margin:0}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;flex:0 0 auto}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--footer-bg);color:#C6D3DF;padding:72px 0 0;margin-top:0}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;margin-bottom:16px}
.footer-brand .brand-mark{color:#fff}
.footer-brand .brand-text{color:#fff}
.footer-brand .brand-sub{color:#8FA5B8}
.site-footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:18px;letter-spacing:.4px}
.footer-desc{font-size:14px;line-height:1.85;color:#9FB2C3;margin-bottom:14px}
.footer-domain{font-size:13px;color:#7E93A6;letter-spacing:.4px;margin:0}
.footer-links{display:flex;flex-direction:column;gap:12px}
.footer-links a,.footer-links li{font-size:14px;color:#B7C6D4;text-decoration:none;line-height:1.6}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{
  margin-top:56px;padding:24px 0;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#8CA0B2;
}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .faq-cols{gap:0 40px}
  .intro-note{padding:24px 26px}
}
@media (max-width:991.98px){
  h1{font-size:34px}
  h2{font-size:26px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-media{order:2;aspect-ratio:16/9}
  .page-hero{padding:32px 0 48px}
  .section{padding:72px 0}
  .steps-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .step-cell{padding:26px 24px 26px 0}
  .step-cell:nth-child(odd){padding-left:0;border-left:0}
  .step-cell:nth-child(even){padding-left:24px;border-left:1px solid var(--line)}
  .step-cell:nth-child(n+3){border-top:1px solid var(--line)}
  .cta-inner{padding:32px;flex-direction:column;align-items:flex-start;gap:24px}
  .cta-actions{width:100%}
  .main-nav{
    position:fixed;top:0;right:0;height:100vh;width:min(320px,86vw);
    background:#fff;flex-direction:column;align-items:flex-start;justify-content:flex-start;
    gap:0;padding:96px 28px 32px;
    transform:translateX(100%);transition:transform .22s ease-out;
    box-shadow:-18px 0 48px -22px rgba(15,27,38,.35);z-index:1040;overflow-y:auto;
  }
  .main-nav.open{transform:translateX(0)}
  .nav-link{width:100%;font-size:17px;padding:16px 0;border-bottom:1px solid var(--line);color:var(--ink-900)}
  .nav-link::after{display:none}
  .nav-link::before{left:auto;right:0;top:50%}
  .nav-link.active{color:var(--primary)}
  .nav-toggle{display:flex}
  .header-actions .btn-ghost{padding:8px 14px;font-size:13px}
}
@media (max-width:767.98px){
  body{line-height:1.9}
  h1{font-size:28px}
  h2{font-size:23px}
  h3{font-size:19px}
  .container{padding-left:20px;padding-right:20px}
  .section{padding:56px 0}
  .page-hero{padding:24px 0 40px}
  .hero-lead{font-size:16px}
  .faq-cols{grid-template-columns:1fr;gap:0}
  .faq-col + .faq-col{margin-top:8px}
  .faq-title{font-size:16px}
  .faq-a-inner{padding-left:0}
  .section-head{margin-bottom:28px}
  .cta-inner{padding:26px 22px}
  .cta-inner h2{font-size:20px}
  .cta-actions .btn{width:100%}
  .footer-bottom{flex-direction:column;gap:8px}
  .related-link{width:100%;justify-content:space-between}
}
@media (max-width:575.98px){
  .header-actions .btn-ghost{display:none}
  .filter-pill{padding:9px 16px;font-size:13px}
  .step-cell{padding:22px 16px 22px 0}
  .step-cell:nth-child(even){padding-left:16px}
}