/* roulang page: index */
:root{
  --brand:#0E5B7A;
  --brand-700:#0A4359;
  --brand-50:#EAF3F7;
  --brand-100:#D6E7EE;
  --accent:#FF6A2B;
  --accent-2:#16A97A;
  --bg:#F5F7F8;
  --surface:#FFFFFF;
  --band:#EEF3F6;
  --ink:#17232B;
  --ink-2:#5A6B76;
  --ink-3:#8A99A3;
  --line:#E2E8EC;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(16,42,66,.05), 0 8px 24px rgba(16,42,66,.06);
  --sh-2:0 10px 32px rgba(16,42,66,.10);
  --t:180ms ease;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.75;color:var(--ink);background:var(--bg);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,textarea{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

/* ---------- 容器与板块 ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--band{background:var(--band);}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head h2{font-size:32px;line-height:1.3;font-weight:700;letter-spacing:-.2px;}
.section-head p{margin-top:12px;font-size:16px;color:var(--ink-2);}
.section-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none;}
.text-link{color:var(--brand);font-size:15px;font-weight:600;display:inline-flex;align-items:center;gap:6px;transition:color var(--t);}
.text-link:hover{color:var(--brand-700);text-decoration:underline;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:background var(--t),color var(--t),box-shadow var(--t),transform var(--t),border-color var(--t);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(14,91,122,.22);}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:0 10px 24px rgba(14,91,122,.30);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--brand);border:1px solid var(--brand-100);}
.btn-ghost:hover{background:var(--brand-50);border-color:var(--brand);}
.btn-sm{height:42px;padding:0 18px;font-size:14px;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.97);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t);
}
.site-header.scrolled{box-shadow:0 6px 24px rgba(16,42,66,.08);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:70px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{width:34px;height:34px;color:var(--brand);flex-shrink:0;}
.brand-text{font-size:18px;font-weight:700;letter-spacing:.2px;color:var(--ink);white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:2px;}
.nav-link{
  position:relative;padding:9px 11px;border-radius:8px;
  font-size:14.5px;color:var(--ink-2);
  transition:color var(--t),background var(--t);
}
.nav-link:hover{color:var(--brand);background:var(--brand-50);}
.nav-link.active{color:var(--brand);font-weight:600;}
.nav-link.active::after{
  content:"";position:absolute;left:11px;right:11px;bottom:-13px;
  height:2px;background:var(--brand);border-radius:2px;
}
.header-tools{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.icon-btn{
  width:42px;height:42px;border-radius:var(--r-btn);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--ink-2);border:1px solid var(--line);background:#fff;
  transition:color var(--t),border-color var(--t),background var(--t);
}
.icon-btn:hover{color:var(--brand);border-color:var(--brand-100);background:var(--brand-50);}
.nav-toggle{display:none;}

/* 搜索抽屉 */
.search-panel{
  position:absolute;left:0;right:0;top:70px;
  background:#fff;border-bottom:1px solid var(--line);
  box-shadow:0 16px 32px rgba(16,42,66,.08);
  display:none;
}
.search-panel.open{display:block;}
.search-form{display:flex;gap:12px;padding:20px 0;}
.search-form input{
  flex:1;height:48px;padding:0 16px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:#fff;
  transition:border-color var(--t),box-shadow var(--t);
}
.search-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-100);}

/* 移动抽屉 */
.nav-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);
  background:#fff;z-index:120;padding:20px 20px 28px;
  transform:translateX(102%);transition:transform 260ms ease;
  display:flex;flex-direction:column;gap:18px;overflow-y:auto;
  box-shadow:-12px 0 32px rgba(16,42,66,.14);
}
.nav-drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{font-size:26px;line-height:1;color:var(--ink-2);width:36px;height:36px;border-radius:8px;}
.drawer-close:hover{background:var(--brand-50);color:var(--brand);}
.drawer-nav{display:flex;flex-direction:column;gap:4px;}
.drawer-link{padding:12px 12px;border-radius:10px;color:var(--ink-2);font-size:15px;transition:background var(--t),color var(--t);}
.drawer-link:hover{background:var(--brand-50);color:var(--brand);}
.drawer-link.active{background:var(--brand-50);color:var(--brand);font-weight:600;}
.drawer-cta{margin-top:auto;}
.nav-mask{
  position:fixed;inset:0;background:rgba(10,30,45,.42);z-index:110;
  opacity:0;pointer-events:none;transition:opacity 220ms ease;
}
.nav-mask.open{opacity:1;pointer-events:auto;}

/* ---------- Hero ---------- */
.hero{padding:72px 0 88px;background:linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%);}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:var(--brand-50);color:var(--brand);
  font-size:13px;font-weight:600;letter-spacing:.3px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);}
.hero h1{
  margin-top:20px;
  font-size:clamp(28px,4vw,50px);line-height:1.24;font-weight:700;letter-spacing:-.5px;
}
.hero-sub{margin-top:16px;font-size:17px;color:var(--ink-2);max-width:34ch;}
.hero-points{margin-top:24px;display:flex;flex-direction:column;gap:10px;}
.hero-points li{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:var(--ink-2);}
.hero-points li::before{
  content:"";flex:0 0 18px;width:18px;height:18px;margin-top:4px;border-radius:50%;
  background:var(--accent-2);
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>");
  background-size:12px 12px;background-repeat:no-repeat;background-position:center;
}
.hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px;}
.hero-trust{margin-top:18px;font-size:13px;color:var(--ink-3);}

.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-card);box-shadow:var(--sh-2);
}
.hero-strip{
  position:absolute;left:-14px;top:36px;bottom:36px;width:6px;border-radius:6px;
  background:linear-gradient(135deg,#0E5B7A 0%,#1187A8 100%);
}
.float-card{
  position:absolute;right:-12px;bottom:-20px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:16px 20px;box-shadow:var(--sh-2);min-width:150px;
}
.float-num{display:block;font-size:30px;font-weight:700;line-height:1.1;color:var(--brand);}
.float-num em{font-style:normal;font-size:16px;color:var(--accent);margin-left:2px;}
.float-label{display:block;margin-top:4px;font-size:13px;color:var(--ink-3);}

/* ---------- 卖点非对称组合 ---------- */
.feature-layout{display:grid;grid-template-columns:5fr 7fr;gap:24px;align-items:stretch;}
.feature-main{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:32px;box-shadow:var(--sh-1);
  transition:box-shadow var(--t),transform var(--t);
  display:flex;flex-direction:column;
}
.feature-main:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.feature-index{
  font-size:38px;font-weight:700;line-height:1;color:var(--brand-100);letter-spacing:-1px;
}
.feature-main h3{margin-top:20px;font-size:22px;font-weight:600;line-height:1.4;}
.feature-main p{margin-top:12px;font-size:15px;color:var(--ink-2);}
.feature-chips{margin-top:auto;padding-top:22px;display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  display:inline-flex;align-items:center;padding:5px 12px;border-radius:999px;
  background:var(--brand-50);color:var(--brand);font-size:12.5px;font-weight:600;
}
.feature-side{display:flex;flex-direction:column;gap:24px;}
.feature-bar{
  flex:1;display:flex;align-items:center;gap:22px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 28px;box-shadow:var(--sh-1);
  transition:box-shadow var(--t),transform var(--t),border-color var(--t);
}
.feature-bar:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:var(--brand-100);}
.feature-bar .num{
  flex:0 0 56px;height:56px;border-radius:14px;background:var(--brand-50);
  display:flex;align-items:center;justify-content:center;
  font-size:20px;font-weight:700;color:var(--brand);
}
.feature-bar h3{font-size:19px;font-weight:600;}
.feature-bar p{margin-top:6px;font-size:14.5px;color:var(--ink-2);}
.feature-bar .arrow{margin-left:auto;color:var(--brand-100);font-size:22px;transition:transform var(--t),color var(--t);}
.feature-bar:hover .arrow{transform:translateX(4px);color:var(--brand);}

/* ---------- 场景流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative;}
.step{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 22px;box-shadow:var(--sh-1);position:relative;
  transition:box-shadow var(--t),transform var(--t);
}
.step:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;
  background:var(--brand);color:#fff;font-size:14px;font-weight:700;
}
.step h3{margin-top:16px;font-size:18px;font-weight:600;}
.step p{margin-top:8px;font-size:14.5px;color:var(--ink-2);}
.scene-media{margin-top:40px;position:relative;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);}
.scene-media img{width:100%;aspect-ratio:21/9;object-fit:cover;}
.scene-caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:22px 26px;color:#fff;
  background:linear-gradient(180deg,rgba(10,30,45,0) 0%,rgba(10,30,45,.78) 100%);
  font-size:15px;
}

/* ---------- 数据与口碑 ---------- */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding:36px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);
}
.metric .num{font-size:38px;font-weight:700;line-height:1.1;color:var(--accent-2);}
.metric .num span{font-size:17px;font-weight:600;margin-left:4px;color:var(--ink-2);}
.metric .label{margin-top:8px;font-size:14px;color:var(--ink-2);}
.quotes{margin-top:24px;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.quote{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--sh-1);display:flex;flex-direction:column;gap:18px;
  transition:box-shadow var(--t),transform var(--t);
}
.quote:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.quote p{font-size:15px;color:var(--ink);line-height:1.8;}
.quote footer{display:flex;align-items:center;gap:12px;margin-top:auto;}
.avatar{
  width:40px;height:40px;border-radius:50%;background:var(--brand-50);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;flex:0 0 40px;
}
.quote .who{font-size:14px;font-weight:600;}
.quote .role{font-size:13px;color:var(--ink-3);}
.partner-row{
  margin-top:32px;display:grid;grid-template-columns:repeat(6,1fr);gap:16px;
}
.partner{
  height:60px;border-radius:var(--r-img);background:#fff;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  color:var(--ink-3);font-size:13.5px;letter-spacing:.4px;
}

/* ---------- 资讯列表 ---------- */
.news-list{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:box-shadow var(--t),transform var(--t);
  display:flex;flex-direction:column;
}
.news-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.news-cover{display:block;background:var(--band);}
.news-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.news-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.badge{
  align-self:flex-start;padding:4px 11px;border-radius:999px;
  background:var(--brand-50);color:var(--brand);font-size:12.5px;font-weight:600;
}
.news-body h3{font-size:17px;font-weight:600;line-height:1.5;}
.news-body h3 a{transition:color var(--t);}
.news-body h3 a:hover{color:var(--brand);}
.news-body .excerpt{
  font-size:14.5px;color:var(--ink-2);
  display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-3);
}
.news-meta a{color:var(--brand);font-weight:600;}
.news-meta a:hover{text-decoration:underline;}
.empty-state{
  grid-column:1 / -1;padding:48px 24px;text-align:center;color:var(--ink-2);
  background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-card);
  font-size:15px;
}
.empty-state a{color:var(--brand);font-weight:600;margin-left:8px;}
.empty-state a:hover{text-decoration:underline;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;margin:0 auto;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  margin-bottom:14px;overflow:hidden;transition:box-shadow var(--t),border-color var(--t);
}
.faq-item.open{box-shadow:var(--sh-1);border-color:var(--brand-100);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 26px;text-align:left;font-size:17px;font-weight:600;color:var(--ink);
}
.faq-q:hover{color:var(--brand);}
.faq-icon{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;
  background:var(--brand-50);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  transition:transform var(--t),background var(--t);
}
.faq-item.open .faq-icon{transform:rotate(180deg);background:var(--brand);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height 280ms ease;}
.faq-a p{padding:0 26px 24px;font-size:15px;color:var(--ink-2);}

/* ---------- 尾部 CTA ---------- */
.cta-band{
  background:var(--brand-50);border-top:1px solid var(--brand-100);border-bottom:1px solid var(--brand-100);
  padding:72px 0;text-align:center;
}
.cta-band h2{font-size:30px;font-weight:700;line-height:1.35;}
.cta-band p{margin-top:14px;font-size:16px;color:var(--ink-2);}
.cta-actions{margin-top:30px;display:flex;justify-content:center;flex-wrap:wrap;gap:14px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-700);color:#fff;padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;}
.footer-brand .brand-mark{color:#fff;}
.footer-brand span{font-size:18px;font-weight:700;}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:32ch;}
.footer-title{font-size:15px;font-weight:700;margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:rgba(255,255,255,.72);transition:color var(--t);}
.footer-links a:hover{color:var(--brand-100);}
.footer-contact{font-size:14px;color:rgba(255,255,255,.72);line-height:1.9;}
.footer-contact strong{color:#fff;font-weight:600;}
.footer-bottom{
  margin-top:52px;padding:22px 0;border-top:1px solid rgba(255,255,255,.14);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.6);
}

/* ---------- 移动端底部条 ---------- */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  display:none;align-items:center;gap:12px;
  padding:10px 16px;background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -6px 20px rgba(16,42,66,.08);
}
.mobile-bar .tip{font-size:13px;font-weight:600;color:var(--ink);flex:1;}
.mobile-bar .btn{height:42px;padding:0 16px;font-size:14px;}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .main-nav{display:none;}
  .nav-toggle{display:inline-flex;}
  .hero{padding:48px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-visual{order:-1;}
  .section{padding:64px 0;}
  .section-head{margin-bottom:34px;}
  .section-head h2{font-size:26px;}
  .feature-layout{grid-template-columns:1fr;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .quotes{grid-template-columns:1fr;}
  .news-list{grid-template-columns:repeat(2,1fr);}
  .partner-row{grid-template-columns:repeat(3,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .mobile-bar{display:flex;}
  body{padding-bottom:74px;}
}
@media (max-width:639px){
  .container{padding:0 20px;}
  .hero-sub{font-size:16px;}
  .hero-actions{gap:12px;}
  .hero-actions .btn{width:100%;}
  .float-card{right:8px;bottom:-16px;padding:12px 16px;min-width:132px;}
  .float-num{font-size:24px;}
  .steps{grid-template-columns:1fr;}
  .metrics{grid-template-columns:1fr;padding:26px;}
  .metric .num{font-size:32px;}
  .news-list{grid-template-columns:1fr;}
  .partner-row{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .cta-band h2{font-size:24px;}
  .section-head--row{flex-direction:column;align-items:flex-start;}
}

/* roulang page: article */
:root{
  --brand:#0E5B7A;
  --brand-700:#0A4359;
  --brand-800:#08303F;
  --brand-50:#EAF3F7;
  --brand-100:#D6E7EE;
  --accent:#FF6A2B;
  --accent-2:#16A97A;
  --bg:#F5F7F8;
  --surface:#FFFFFF;
  --band:#EEF3F6;
  --ink:#17232B;
  --ink-2:#5A6B76;
  --ink-3:#8A99A3;
  --line:#E2E8EC;
  --radius:16px;
  --radius-sm:10px;
  --shadow-1:0 1px 2px rgba(16,42,66,.05), 0 8px 24px rgba(16,42,66,.06);
  --shadow-2:0 10px 32px rgba(16,42,66,.10);
  --container:1200px;
  --t:180ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  padding-bottom:84px;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.container{max-width:var(--container);margin:0 auto;padding:0 20px}
@media (min-width:1024px){.container{padding:0 24px}}
.num{font-variant-numeric:tabular-nums}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t),background var(--t);
}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(16,42,66,.08)}
.header-inner{display:flex;align-items:center;gap:18px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{width:30px;height:30px;color:var(--brand);flex:none}
.brand-text{font-size:19px;font-weight:700;color:var(--ink);letter-spacing:.2px}
.main-nav{display:none;align-items:center;gap:4px;margin-left:14px}
@media (min-width:1024px){.main-nav{display:flex}}
.nav-link{position:relative;padding:9px 12px;font-size:14.5px;color:var(--ink-2);border-radius:8px;transition:color var(--t),background var(--t)}
.nav-link:hover{color:var(--brand);background:var(--brand-50)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--brand)}
.header-tools{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{
  width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink-2);
  cursor:pointer;transition:all var(--t);
}
.icon-btn:hover{color:var(--brand);border-color:var(--brand-100);background:var(--brand-50)}
.nav-toggle{display:inline-flex}
@media (min-width:1024px){.nav-toggle{display:none}}
.search-panel{display:none;border-top:1px solid var(--line);background:#fff;padding:14px 0}
.search-panel.open{display:block}
.search-form{display:flex;gap:10px}
.search-form input{
  flex:1;height:46px;padding:0 16px;font-size:15px;color:var(--ink);
  border:1px solid var(--line);border-radius:var(--radius-sm);background:#fbfcfd;
}
.search-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-100)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  white-space:nowrap;transition:all var(--t);
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:#0b4c66;box-shadow:0 8px 20px rgba(14,91,122,.28);transform:translateY(-1px)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand-100)}
.btn-ghost:hover{background:var(--brand-50);border-color:var(--brand)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#ef5d1e;box-shadow:0 8px 20px rgba(255,106,43,.30);transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn:active{transform:translateY(0)}

/* ===== 抽屉 ===== */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);z-index:120;
  background:#fff;padding:22px 20px;display:flex;flex-direction:column;gap:6px;
  transform:translateX(102%);transition:transform .24s ease;
  box-shadow:-8px 0 30px rgba(16,42,66,.14);
}
.drawer.open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.drawer-title{font-size:16px;font-weight:700}
.drawer .nav-link{padding:12px 10px;font-size:15px;border-radius:10px}
.drawer .btn{margin-top:auto}
.drawer-overlay{
  position:fixed;inset:0;z-index:110;background:rgba(9,33,46,.45);
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;
}
.drawer-overlay.open{opacity:1;visibility:visible}

/* ===== 文章头 ===== */
.article-hero{background:var(--band);border-bottom:1px solid var(--line);padding:24px 0 28px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-3)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:#c3cfd6}
.breadcrumb a{color:var(--ink-2);transition:color var(--t)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .bc-current{color:var(--brand);max-width:min(60vw,420px);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ===== 文章主体 ===== */
.article-wrap{padding:38px 0 72px}
.article-shell{max-width:880px;margin:0 auto}
.post-head{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-1);padding:30px;
}
@media (max-width:640px){.post-head{padding:22px}}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;background:var(--brand-50);color:var(--brand);
}
.badge-line{margin-bottom:12px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.badge-soft{background:#fff;border:1px solid var(--line);color:var(--ink-2);font-weight:500}
.post-title{font-size:34px;line-height:1.32;font-weight:700;color:var(--ink);margin:4px 0 14px}
@media (max-width:640px){.post-title{font-size:25px}}
.post-meta{display:flex;flex-wrap:wrap;gap:8px 20px;font-size:13.5px;color:var(--ink-3)}
.post-meta span{display:inline-flex;align-items:center;gap:6px}
.post-cover{margin-top:22px;border-radius:12px;overflow:hidden;aspect-ratio:16/9;background:var(--band)}
.post-cover img{width:100%;height:100%;object-fit:cover}

.article-body{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-1);padding:36px 40px;margin-top:22px;
  font-size:16.5px;line-height:1.9;color:#26343d;
}
@media (max-width:640px){.article-body{padding:22px 20px;font-size:16px}}
.article-body h2{font-size:26px;line-height:1.35;font-weight:700;color:var(--ink);margin:40px 0 14px}
.article-body h2:first-child{margin-top:0}
.article-body h3{font-size:19px;font-weight:600;color:var(--ink);margin:28px 0 10px}
.article-body p{margin-bottom:16px}
.article-body ul,.article-body ol{padding-left:22px;margin-bottom:18px;list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:8px}
.article-body img{border-radius:12px;margin:22px auto}
.article-body blockquote{
  margin:22px 0;padding:14px 20px;border-left:3px solid var(--brand);
  background:var(--brand-50);border-radius:0 10px 10px 0;color:var(--ink-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body a{color:var(--brand);border-bottom:1px solid var(--brand-100)}
.article-body a:hover{color:var(--brand-700)}
.article-body strong{color:var(--ink)}
.article-body pre{
  background:#f4f6f8;border:1px solid var(--line);border-radius:12px;
  padding:16px;overflow:auto;font-size:14px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body code{background:#f1f4f6;border-radius:6px;padding:1px 6px;font-size:14.5px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.article-body pre code{background:none;padding:0}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article-body th{background:var(--band);font-weight:600}

.empty-state{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-1);padding:56px 24px;text-align:center;margin-top:22px;
}
.empty-state .empty-icon{
  width:56px;height:56px;margin:0 auto 16px;border-radius:50%;
  background:var(--band);display:flex;align-items:center;justify-content:center;color:var(--ink-3);
}
.empty-state .empty-title{font-size:20px;font-weight:700;color:var(--ink);margin-bottom:6px}
.empty-state .empty-desc{font-size:14.5px;color:var(--ink-2);margin-bottom:20px}

.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:999px;
  background:#fff;border:1px solid var(--line);font-size:13px;color:var(--ink-2);
  transition:all var(--t);
}
.tag:hover{border-color:var(--brand-100);background:var(--brand-50);color:var(--brand)}
.post-actions{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  margin-top:26px;padding-top:22px;border-top:1px dashed var(--line);
}
.text-link{color:var(--brand);font-size:14.5px;font-weight:600;transition:color var(--t)}
.text-link:hover{color:var(--brand-700);text-decoration:underline}

/* ===== 相关推荐 ===== */
.related{margin-top:56px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px}
.section-head h2{font-size:26px;font-weight:700;line-height:1.35}
@media (max-width:640px){.section-head h2{font-size:22px}}
.section-head .sub{font-size:14px;color:var(--ink-2);margin-top:6px}
.card-grid-3{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:640px){.card-grid-3{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.card-grid-3{grid-template-columns:repeat(3,1fr)}}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-1);overflow:hidden;display:flex;flex-direction:column;
  transition:transform var(--t),box-shadow var(--t);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.card-thumb{aspect-ratio:16/9;background:var(--band);overflow:hidden}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.card:hover .card-thumb img{transform:scale(1.04)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:9px;flex:1}
.card-body h3{font-size:17.5px;font-weight:600;line-height:1.5;color:var(--ink)}
.card-body p{
  font-size:14px;color:var(--ink-2);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{margin-top:auto;font-size:12.5px;color:var(--ink-3);display:flex;align-items:center;gap:10px}

/* ===== 尾部 CTA ===== */
.cta-band{background:var(--brand-50);border-top:1px solid var(--brand-100);padding:64px 0}
.cta-inner{max-width:720px;margin:0 auto;text-align:center}
.cta-inner h2{font-size:30px;font-weight:700;line-height:1.35;margin-bottom:12px}
@media (max-width:640px){.cta-inner h2{font-size:23px}}
.cta-inner p{font-size:15.5px;color:var(--ink-2);margin-bottom:26px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

/* ===== 页脚 ===== */
.site-footer{background:var(--brand-800);color:#cfe0e8;padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px;padding-bottom:40px}
@media (min-width:768px){.footer-grid{grid-template-columns:1.8fr 1fr 1fr 1.2fr}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:19px;font-weight:700}
.footer-brand .brand-mark{color:#7fc4dd}
.footer-about{margin-top:14px;font-size:14px;line-height:1.85;color:#a8c2ce;max-width:36ch}
.footer-col h4{font-size:14px;color:#fff;font-weight:600;margin-bottom:14px;letter-spacing:.4px}
.footer-col a{display:block;font-size:14px;color:#a8c2ce;padding:5px 0;transition:color var(--t)}
.footer-col a:hover{color:#fff}
.footer-col p{font-size:14px;color:#a8c2ce;line-height:1.9}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:18px 0 22px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:#8fadbb;
}
.footer-bottom a{color:#8fadbb}
.footer-bottom a:hover{color:#fff}

/* ===== 移动端底部转化条 ===== */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  display:flex;align-items:center;gap:12px;
  background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -6px 20px rgba(16,42,66,.10);
  padding:10px 16px;
}
.mobile-bar .bar-text{font-size:13.5px;color:var(--ink-2);line-height:1.4;flex:1}
.mobile-bar .bar-text b{display:block;color:var(--ink);font-size:14px}
@media (min-width:1024px){
  .mobile-bar{display:none}
  body{padding-bottom:0}
}

/* roulang page: category1 */
:root{
  --brand:#0E5B7A;
  --brand-700:#0A4359;
  --brand-50:#EAF3F7;
  --brand-100:#D6E7EE;
  --accent:#FF6A2B;
  --accent-2:#16A97A;
  --bg:#F5F7F8;
  --surface:#FFFFFF;
  --band:#EEF3F6;
  --ink:#17232B;
  --ink-2:#5A6B76;
  --ink-3:#8A99A3;
  --line:#E2E8EC;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --shadow-1:0 1px 2px rgba(16,42,66,.05), 0 8px 24px rgba(16,42,66,.06);
  --shadow-2:0 10px 32px rgba(16,42,66,.10);
  --ease:180ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body.site-body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  padding-bottom:0;
}
body.site-body img{display:block;max-width:100%}
body.site-body a{color:inherit;text-decoration:none}
body.site-body button{font-family:inherit}
body.site-body h1,body.site-body h2,body.site-body h3,body.site-body h4,body.site-body p,body.site-body ul,body.site-body ol{margin:0;padding:0}
body.site-body ul,body.site-body ol{list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){.container{padding:0 24px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.95);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(16,42,66,.08)}
.header-inner{display:flex;align-items:center;gap:18px;height:70px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--brand);flex:0 0 auto}
.brand-mark{width:34px;height:34px;color:var(--brand);flex:0 0 auto}
.brand-text{font-size:19px;font-weight:700;letter-spacing:.3px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:10px}
.nav-link{
  position:relative;display:inline-block;padding:9px 12px;border-radius:8px;
  font-size:15px;color:var(--ink-2);transition:color var(--ease),background var(--ease);
  white-space:nowrap;
}
.nav-link:hover{color:var(--brand-700);background:var(--brand-50)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;border-radius:2px;background:var(--brand);
}
.header-tools{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border:1px solid var(--line);border-radius:10px;
  background:#fff;color:var(--ink-2);cursor:pointer;transition:all var(--ease);
}
.icon-btn:hover{color:var(--brand);border-color:var(--brand-100);background:var(--brand-50)}
.icon-btn:focus-visible,.btn:focus-visible,.nav-link:focus-visible,a:focus-visible,button:focus-visible{
  outline:2px solid var(--brand);outline-offset:2px;
}
.nav-toggle{display:none}
.search-panel{display:none;border-top:1px solid var(--line);background:#fff}
.search-panel.open{display:block}
.search-form{display:flex;gap:10px;padding:14px 0}
.search-form input[type="search"]{
  flex:1;height:46px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-btn);
  font-size:15px;color:var(--ink);background:#fff;transition:all var(--ease);
}
.search-form input[type="search"]:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-100)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:47px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:all var(--ease);
}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(14,91,122,.18)}
.btn-primary:hover{background:linear-gradient(135deg,#0E5B7A,#1187A8);transform:translateY(-1px);box-shadow:0 12px 26px rgba(14,91,122,.26)}
.btn-ghost{background:#fff;border-color:var(--brand-100);color:var(--brand)}
.btn-ghost:hover{background:var(--brand-50);border-color:var(--brand);transform:translateY(-1px)}
.btn-line{background:transparent;border-color:rgba(255,255,255,.45);color:#fff}
.btn-line:hover{background:rgba(255,255,255,.12)}
.link-more{color:var(--brand);font-weight:600;font-size:14px;display:inline-flex;align-items:center;gap:6px;transition:all var(--ease)}
.link-more:hover{color:var(--brand-700);text-decoration:underline}

/* ---------- hero ---------- */
.page-hero{position:relative;overflow:hidden;background:var(--band);padding:38px 0 46px}
.page-hero-bg{
  position:absolute;inset:0;
  background-image:linear-gradient(100deg,rgba(245,247,248,.96) 0%,rgba(245,247,248,.88) 46%,rgba(214,231,238,.62) 100%),url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center right;
  pointer-events:none;
}
.page-hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.45fr) minmax(0,.85fr);gap:36px;align-items:center}
.breadcrumb{margin-bottom:16px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3)}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--line);color:#B9C6CE}
.breadcrumb a{color:var(--ink-2);transition:color var(--ease)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb li[aria-current] {color:var(--brand);font-weight:600}
.hero-title{font-size:clamp(28px,4.2vw,46px);line-height:1.24;font-weight:700;letter-spacing:-.4px;max-width:20ch}
.hero-title em{font-style:normal;color:var(--brand)}
.hero-lead{margin-top:16px;font-size:16px;line-height:1.8;color:var(--ink-2);max-width:34em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:24px}
.hero-points li{position:relative;padding-left:22px;font-size:14px;color:var(--ink-2)}
.hero-points li::before{
  content:"";position:absolute;left:0;top:9px;width:9px;height:9px;border-radius:3px;
  background:var(--accent-2);box-shadow:0 0 0 3px rgba(22,169,122,.16);
}
.hero-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);padding:22px;
}
.hero-card h2{font-size:15px;font-weight:700;color:var(--ink)}
.hero-card p{margin-top:8px;font-size:13.5px;color:var(--ink-2);line-height:1.7}
.hero-card-list{margin-top:16px;display:grid;gap:12px}
.hero-card-list li{display:flex;align-items:baseline;gap:10px;font-size:14px;color:var(--ink)}
.hero-card-list b{font-size:22px;font-weight:700;color:var(--brand);font-variant-numeric:tabular-nums;line-height:1}
.hero-card-list span{font-size:13px;color:var(--ink-3)}

/* ---------- section base ---------- */
.section{padding:64px 0}
@media (min-width:1024px){.section{padding:100px 0}}
.section.band{background:var(--band)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 12px;border-radius:999px;background:var(--brand-50);color:var(--brand-700);
  font-size:12.5px;font-weight:600;letter-spacing:.4px;
}
.section-head{max-width:720px}
.section-title{margin-top:16px;font-size:clamp(22px,2.6vw,33px);font-weight:700;line-height:1.3;letter-spacing:-.3px}
.section-sub{margin-top:12px;font-size:15.5px;color:var(--ink-2);line-height:1.8}

/* ---------- services layout ---------- */
.svc-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:44px;align-items:start;margin-top:48px}
.anchor-nav{position:sticky;top:92px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-1);padding:18px}
.anchor-nav p{font-size:13px;color:var(--ink-3);letter-spacing:.6px;margin-bottom:10px}
.anchor-link{
  display:block;padding:10px 12px;border-radius:10px;font-size:14px;color:var(--ink-2);
  border-left:2px solid transparent;transition:all var(--ease);
}
.anchor-link:hover{background:var(--brand-50);color:var(--brand-700)}
.anchor-link.active{background:var(--brand-50);border-left-color:var(--brand);color:var(--brand);font-weight:600}
.anchor-cta{margin-top:14px;padding-top:14px;border-top:1px dashed var(--line);font-size:13px;color:var(--ink-3);line-height:1.7}

.svc-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:34px;align-items:center;padding:34px 0;border-top:1px solid var(--line)}
.svc-row:first-of-type{border-top:none;padding-top:0}
.svc-row.is-rev .svc-media{order:2}
.svc-media{border-radius:var(--r-img);overflow:hidden;background:var(--band);border:1px solid var(--line);aspect-ratio:4/3}
.svc-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.svc-row:hover .svc-media img{transform:scale(1.03)}
.svc-index{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:1px;font-variant-numeric:tabular-nums}
.svc-title{margin-top:8px;font-size:21px;font-weight:600;line-height:1.4}
.svc-desc{margin-top:10px;font-size:15.5px;color:var(--ink-2);line-height:1.8}
.check-list{margin-top:16px;display:grid;gap:10px}
.check-list li{position:relative;padding-left:24px;font-size:14.5px;color:var(--ink)}
.check-list li::before{
  content:"";position:absolute;left:0;top:6px;width:14px;height:9px;
  border-left:2px solid var(--accent-2);border-bottom:2px solid var(--accent-2);
  transform:rotate(-45deg);border-radius:1px;
}
.svc-row .link-more{margin-top:18px}

/* ---------- scenes ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;margin-top:44px}
.scene-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);padding:24px;transition:all var(--ease);
}
.scene-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.scene-tag{display:inline-block;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:600;background:var(--brand-50);color:var(--brand-700)}
.scene-card h3{margin-top:14px;font-size:18px;font-weight:600}
.scene-card p{margin-top:8px;font-size:14px;color:var(--ink-2);line-height:1.75}

/* ---------- process ---------- */
.flow{position:relative;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:20px;margin-top:46px}
.flow::before{content:"";position:absolute;left:24px;right:24px;top:21px;height:2px;background:var(--brand-100)}
.flow-item{position:relative;padding-top:56px}
.flow-num{
  position:absolute;top:0;left:0;width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--surface);border:2px solid var(--brand);color:var(--brand);
  font-weight:700;font-size:15px;font-variant-numeric:tabular-nums;
}
.flow-item h3{font-size:16.5px;font-weight:600}
.flow-item p{margin-top:6px;font-size:14px;color:var(--ink-2);line-height:1.75}

/* ---------- metrics ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.metric{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-1);padding:26px 24px}
.metric .num{font-size:38px;font-weight:700;color:var(--accent-2);font-variant-numeric:tabular-nums;line-height:1}
.metric .unit{font-size:14px;font-weight:600;color:var(--ink-2);margin-left:6px}
.metric .label{margin-top:10px;font-size:14px;color:var(--ink-2)}

/* ---------- faq ---------- */
.faq-wrap{max-width:860px;margin:40px auto 0}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-1);margin-bottom:14px;overflow:hidden;transition:box-shadow var(--ease)}
.faq-item:hover{box-shadow:var(--shadow-2)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;background:none;border:none;cursor:pointer;text-align:left;
  font-size:16.5px;font-weight:600;color:var(--ink);line-height:1.5;
}
.faq-q .caret{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--brand-50);color:var(--brand);transition:transform var(--ease),background var(--ease);
}
.faq-item.open .faq-q .caret{transform:rotate(180deg);background:var(--brand);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a p{padding:0 22px 20px;font-size:15px;color:var(--ink-2);line-height:1.8}

/* ---------- next ---------- */
.next-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:40px}
.next-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--shadow-1);overflow:hidden;transition:all var(--ease);
}
.next-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.next-thumb{aspect-ratio:16/9;background:var(--band);overflow:hidden}
.next-thumb img{width:100%;height:100%;object-fit:cover}
.next-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:8px;flex:1}
.next-body h3{font-size:17px;font-weight:600}
.next-body p{font-size:14px;color:var(--ink-2);line-height:1.7;flex:1}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--brand-50);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-band .container{position:relative;z-index:2;padding-top:64px;padding-bottom:64px;text-align:center}
@media (min-width:1024px){.cta-band .container{padding-top:88px;padding-bottom:88px}}
.cta-band h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;line-height:1.34}
.cta-band p{margin:14px auto 0;max-width:44em;font-size:15.5px;color:var(--ink-2);line-height:1.8}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:26px}
.cta-note{margin-top:16px;font-size:13px;color:var(--ink-3)}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-700);color:#D8E5EB;margin-top:0;padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-size:19px;font-weight:700}
.footer-brand svg{width:32px;height:32px;color:#fff}
.site-footer p.footer-desc{margin-top:14px;font-size:14px;line-height:1.8;color:#B9CFD9;max-width:30em}
.footer-col h3{font-size:14px;color:#fff;font-weight:600;letter-spacing:.6px;margin-bottom:14px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:#B9CFD9;transition:color var(--ease)}
.footer-col a:hover{color:var(--brand-100)}
.footer-contact li{font-size:14px;color:#B9CFD9;line-height:1.7}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.14);padding:20px 0;
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:#9FBAC6;
}

/* ---------- sticky bar ---------- */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -8px 24px rgba(16,42,66,.10);
  padding:10px 0;
}
.sticky-bar-inner{display:flex;align-items:center;gap:12px;justify-content:space-between}
.sticky-bar strong{font-size:14px;font-weight:600;color:var(--ink)}
.sticky-bar small{display:block;font-size:12px;color:var(--ink-3);margin-top:2px}
.sticky-actions{display:flex;gap:8px;flex:0 0 auto}
@media (min-width:1024px){.sticky-bar{display:none}}
@media (max-width:1023px){body.site-body{padding-bottom:76px}}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav-toggle{display:inline-flex}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:90;
    flex-direction:column;align-items:stretch;gap:4px;margin:0;
    background:#fff;padding:84px 20px 28px;overflow-y:auto;
    transform:translateX(104%);transition:transform .26s ease;
    box-shadow:-14px 0 36px rgba(16,42,66,.16);
  }
  .main-nav.open{transform:translateX(0)}
  .nav-link{padding:12px 12px;font-size:15.5px;border-radius:10px}
  .nav-link.active::after{display:none}
  .nav-link.active{background:var(--brand-50)}
  .nav-mask{
    position:fixed;inset:0;background:rgba(23,35,43,.42);z-index:85;
    opacity:0;visibility:hidden;transition:all .24s ease;
  }
  .nav-mask.open{opacity:1;visibility:visible}
  .page-hero-inner{grid-template-columns:1fr;gap:26px}
  .svc-layout{grid-template-columns:1fr;gap:28px}
  .anchor-nav{position:static}
  .svc-row{grid-template-columns:1fr;gap:20px;padding:28px 0}
  .svc-row.is-rev .svc-media{order:0}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .flow{grid-template-columns:1fr;gap:0}
  .flow::before{display:none}
  .flow-item{padding:0 0 24px 62px}
  .flow-num{top:0;left:0}
  .metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
  .next-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:639px){
  .header-inner{height:64px;gap:12px}
  .brand-text{font-size:17px}
  .brand-mark{width:30px;height:30px}
  .btn-sm{height:38px;padding:0 13px;font-size:13.5px}
  .header-tools .btn-primary{display:none}
  .hero-actions .btn{width:100%}
  .scene-grid,.metrics,.next-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:56px 0}
  .sticky-bar strong{font-size:13px}
  .sticky-bar .btn{padding:0 14px;font-size:13.5px;height:42px}
}

/* roulang page: category2 */
:root{
  --brand:#0E5B7A;
  --brand-700:#0A4359;
  --brand-50:#EAF3F7;
  --brand-100:#D6E7EE;
  --accent:#FF6A2B;
  --accent-2:#16A97A;
  --bg:#F5F7F8;
  --surface:#FFFFFF;
  --band:#EEF3F6;
  --ink:#17232B;
  --ink-2:#5A6B76;
  --ink-3:#8A99A3;
  --line:#E2E8EC;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --sh-1:0 1px 2px rgba(16,42,66,.05), 0 8px 24px rgba(16,42,66,.06);
  --sh-2:0 10px 32px rgba(16,42,66,.10);
  --ease:180ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body.page-body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;object-fit:cover}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3{line-height:1.28;font-weight:700}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:1024px){.container{padding:0 24px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.95);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease);
}
.site-header.scrolled{box-shadow:0 6px 22px rgba(16,42,66,.09)}
.header-inner{display:flex;align-items:center;gap:16px;height:70px}
.brand{display:flex;align-items:center;gap:10px;color:var(--brand);font-weight:700;font-size:19px;letter-spacing:.2px;flex:none}
.brand-mark{width:30px;height:30px;color:var(--brand);flex:none}
.brand-text{white-space:nowrap}
.main-nav{display:none}
.header-tools{display:flex;align-items:center;gap:10px;margin-left:auto}
.icon-btn{
  width:40px;height:40px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  color:var(--ink-2);border:1px solid var(--line);background:#fff;transition:all var(--ease);
}
.icon-btn:hover{color:var(--brand);border-color:var(--brand-100);background:var(--brand-50)}
.nav-toggle{display:inline-flex}

.nav-link{
  position:relative;display:block;padding:9px 12px;border-radius:8px;
  font-size:15px;font-weight:500;color:var(--ink-2);transition:color var(--ease),background var(--ease);
}
.nav-link:hover{color:var(--brand);background:var(--brand-50)}
.nav-link.active{color:var(--brand);font-weight:600;background:var(--brand-50)}
@media(min-width:1024px){
  .nav-link.active{background:transparent}
  .nav-link.active::after{
    content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;border-radius:2px;background:var(--brand);
  }
}

.search-panel{display:none;border-top:1px solid var(--line);background:#fff}
.search-panel.open{display:block}
.search-form{display:flex;gap:10px;padding:14px 0}
.search-form input{
  flex:1;height:46px;padding:0 16px;border:1px solid var(--line);border-radius:var(--r-sm);
  font-size:15px;color:var(--ink);background:#fff;transition:border var(--ease),box-shadow var(--ease);
}
.search-form input::placeholder{color:var(--ink-3)}
.search-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-100)}

@media(max-width:1023px){
  .main-nav{
    display:flex;flex-direction:column;gap:4px;
    position:fixed;top:70px;right:0;bottom:0;width:min(320px,86vw);
    background:#fff;padding:18px;overflow-y:auto;
    transform:translateX(105%);transition:transform 240ms ease;
    box-shadow:-10px 0 34px rgba(16,42,66,.14);
  }
  .main-nav.open{transform:translateX(0)}
  .nav-link{padding:13px 14px;border-radius:10px;font-size:16px}
  .nav-link.active::after{display:none}
  .brand-text{font-size:17px}
}
@media(min-width:1024px){
  .main-nav{display:flex;align-items:center;gap:2px;margin-left:14px}
  .nav-toggle{display:none}
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-sm);border:1px solid transparent;
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:background var(--ease),color var(--ease),box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(14,91,122,.22)}
.btn-primary:hover{background:linear-gradient(135deg,#0E5B7A,#1187A8);transform:translateY(-1px);box-shadow:0 10px 26px rgba(14,91,122,.28)}
.btn-outline{background:#fff;color:var(--brand);border-color:var(--brand-100)}
.btn-outline:hover{background:var(--brand-50);border-color:var(--brand);transform:translateY(-1px)}
.btn-link{color:var(--brand);font-weight:600;font-size:15px;display:inline-flex;align-items:center;gap:6px}
.btn-link:hover{color:var(--brand-700);text-decoration:underline;text-underline-offset:4px}

.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;background:var(--brand-50);color:var(--brand);
}
.badge-accent{background:#FFF1EA;color:#D9500F}
.badge-green{background:#E7F7F1;color:#0E7D5A}

/* ---------- hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;color:#fff;
  background-image:linear-gradient(102deg,rgba(10,67,89,.95) 0%,rgba(14,91,122,.88) 46%,rgba(14,91,122,.52) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  padding:44px 0 52px;
}
.cat-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:3px;
  background:linear-gradient(90deg,#0E5B7A,#1187A8 55%,#FF6A2B);
  opacity:.85;
}
.cat-hero .inner{position:relative;z-index:2;max-width:720px}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:rgba(255,255,255,.75);margin-bottom:18px}
.crumb a{color:rgba(255,255,255,.78);transition:color var(--ease)}
.crumb a:hover{color:#fff}
.crumb .sep{opacity:.5}
.crumb .current{color:#fff;font-weight:600}
.cat-hero h1{font-size:28px;color:#fff;letter-spacing:.2px}
.cat-hero .lead{margin-top:14px;font-size:16px;line-height:1.8;color:rgba(255,255,255,.86);max-width:640px}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.chip{
  display:inline-flex;align-items:center;gap:7px;height:32px;padding:0 14px;border-radius:999px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.26);
  font-size:13.5px;color:#fff;font-weight:500;
}
.chip .dot{width:6px;height:6px;border-radius:50%;background:#fff;opacity:.85}

/* ---------- section ---------- */
.section{padding:52px 0}
.section-band{background:var(--band)}
.section-white{background:var(--surface)}
@media(min-width:1024px){.section{padding:92px 0}}
.section-head{max-width:700px;margin-bottom:34px}
.section-head h2{font-size:23px;color:var(--ink)}
@media(min-width:1024px){.section-head h2{font-size:31px}}
.section-head p{margin-top:12px;color:var(--ink-2);font-size:15.5px;line-height:1.8}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--brand);text-transform:uppercase;margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--accent)}

/* ---------- tabs ---------- */
.tabs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.tab-btn{
  height:42px;padding:0 20px;border-radius:999px;border:1px solid var(--line);
  background:#fff;color:var(--ink-2);font-size:14.5px;font-weight:600;
  transition:all var(--ease);
}
.tab-btn:hover{color:var(--brand);border-color:var(--brand-100);background:var(--brand-50)}
.tab-btn.active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(14,91,122,.24)}
.tab-panel{display:none}
.tab-panel.active{display:block;animation:fadeUp 280ms ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.panel-note{
  display:flex;align-items:flex-start;gap:10px;font-size:14.5px;color:var(--ink-2);
  background:var(--brand-50);border-left:3px solid var(--brand);border-radius:0 var(--r-sm) var(--r-sm) 0;
  padding:14px 18px;margin-bottom:24px;
}

/* ---------- plan cards ---------- */
.plan-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:640px){.plan-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.plan-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
.plan-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.plan-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:var(--brand-100)}
.plan-card .plan-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px}
.plan-card h3{font-size:20px;font-weight:700}
.plan-card .plan-desc{font-size:14.5px;color:var(--ink-2);line-height:1.75;min-height:52px}
.spec-list{margin-top:18px;border-top:1px solid var(--line)}
.spec-list li{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px}
.spec-list .k{color:var(--ink-3);flex:none}
.spec-list .v{color:var(--ink);font-weight:600;text-align:right}
.plan-card .plan-foot{margin-top:22px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.price-hint{font-size:13px;color:var(--ink-3)}
.price-hint b{display:block;font-size:19px;color:var(--accent);font-variant-numeric:tabular-nums}

/* ---------- feature split ---------- */
.split{display:grid;grid-template-columns:1fr;gap:28px;align-items:center}
@media(min-width:1024px){.split{grid-template-columns:1fr 1.05fr;gap:56px}}
.split-media{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);background:var(--band)}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.split-media::before{
  content:"";position:absolute;left:0;top:0;width:5px;height:100%;
  background:linear-gradient(180deg,#0E5B7A,#1187A8);z-index:2;
}
.float-card{
  position:absolute;right:18px;bottom:18px;background:#fff;border-radius:var(--r-md);
  padding:14px 18px;box-shadow:var(--sh-2);z-index:3;
}
.float-card .num{font-size:26px;font-weight:700;color:var(--accent-2);font-variant-numeric:tabular-nums;line-height:1.1}
.float-card .txt{font-size:12.5px;color:var(--ink-2);margin-top:4px}
.point-list{margin-top:22px;display:grid;gap:14px}
.point-list li{display:flex;gap:12px;font-size:15px;color:var(--ink-2);line-height:1.7}
.point-list .tick{
  flex:none;width:22px;height:22px;border-radius:50%;background:#E7F7F1;color:var(--accent-2);
  display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;margin-top:2px;
}

/* ---------- flow ---------- */
.flow{display:grid;grid-template-columns:1fr;gap:18px}
@media(min-width:640px){.flow{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.flow{grid-template-columns:repeat(4,1fr);gap:24px}}
.flow-step{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px 22px;box-shadow:var(--sh-1);transition:transform var(--ease),box-shadow var(--ease);
}
.flow-step:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.flow-step .idx{
  font-size:15px;font-weight:700;color:var(--brand);background:var(--brand-50);
  width:38px;height:38px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;margin-bottom:14px;
}
.flow-step h3{font-size:18px;margin-bottom:8px}
.flow-step p{font-size:14.5px;color:var(--ink-2);line-height:1.75}
.flow-step::after{
  content:"";position:absolute;right:-14px;top:42px;width:14px;height:2px;background:var(--line);display:none;
}
@media(min-width:1024px){.flow-step:not(:last-child)::after{display:block}}

/* ---------- scenario rows ---------- */
.row-list{display:grid;gap:14px}
.row-item{
  display:flex;align-items:center;gap:18px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:20px 22px;box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease);
}
.row-item:hover{transform:translateY(-2px);box-shadow:var(--sh-2);background:var(--brand-50)}
.row-item .mark{
  flex:none;width:46px;height:46px;border-radius:12px;background:var(--brand-50);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;
  font-variant-numeric:tabular-nums;
}
.row-item:hover .mark{background:#fff}
.row-item .body{flex:1;min-width:0}
.row-item h3{font-size:17px;margin-bottom:6px}
.row-item p{font-size:14.5px;color:var(--ink-2);line-height:1.7}
.row-arrow{flex:none;color:var(--ink-3);transition:transform var(--ease),color var(--ease)}
.row-item:hover .row-arrow{color:var(--brand);transform:translateX(3px)}

/* ---------- stats ---------- */
.stats{
  display:grid;grid-template-columns:repeat(2,1fr);gap:22px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px 24px;box-shadow:var(--sh-1);
}
@media(min-width:1024px){.stats{grid-template-columns:repeat(4,1fr);padding:36px 32px;gap:28px}}
.stat .num{
  font-size:30px;font-weight:700;color:var(--brand);line-height:1.1;
  font-variant-numeric:tabular-nums;letter-spacing:-.5px;
}
@media(min-width:1024px){.stat .num{font-size:38px}}
.stat .num em{font-style:normal;font-size:16px;font-weight:600;color:var(--accent-2);margin-left:2px}
.stat .label{margin-top:8px;font-size:13.5px;color:var(--ink-2);line-height:1.6}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:860px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);overflow:hidden;transition:border-color var(--ease)}
.faq-item.open{border-color:var(--brand-100)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;text-align:left;font-size:16.5px;font-weight:600;color:var(--ink);
  transition:background var(--ease),color var(--ease);
}
.faq-q:hover{background:var(--brand-50);color:var(--brand)}
.faq-icon{
  flex:none;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--brand);
  transition:transform var(--ease),background var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(180deg);background:var(--brand-50)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms ease}
.faq-a .inner{padding:0 22px 20px;font-size:15px;color:var(--ink-2);line-height:1.85}
.notice{
  display:flex;align-items:center;gap:12px;background:var(--band);border-radius:var(--r-md);
  padding:14px 20px;font-size:14px;color:var(--ink-2);margin:6px 0;
}
.notice b{color:var(--brand);font-weight:600}

/* ---------- CTA ---------- */
.cta-block{
  background:var(--brand-50);border-top:1px solid var(--brand-100);border-bottom:1px solid var(--brand-100);
  padding:52px 0;
}
@media(min-width:1024px){.cta-block{padding:76px 0}}
.cta-inner{display:grid;gap:24px;align-items:center}
@media(min-width:1024px){.cta-inner{grid-template-columns:1.25fr .9fr;gap:48px}}
.cta-inner h2{font-size:24px}
@media(min-width:1024px){.cta-inner h2{font-size:30px}}
.cta-inner p{margin-top:12px;color:var(--ink-2);font-size:15.5px;line-height:1.8;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.cta-trust{margin-top:14px;font-size:13.5px;color:var(--ink-3)}

/* ---------- related ---------- */
.related{display:grid;gap:18px;grid-template-columns:1fr}
@media(min-width:640px){.related{grid-template-columns:repeat(3,1fr)}}
.related-card{
  display:flex;gap:14px;align-items:center;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:14px;box-shadow:var(--sh-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.related-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-100)}
.related-card .thumb{flex:none;width:78px;height:62px;border-radius:var(--r-md);overflow:hidden;background:var(--band)}
.related-card .thumb img{width:100%;height:100%;object-fit:cover}
.related-card h3{font-size:15.5px;margin-bottom:4px}
.related-card span{font-size:13px;color:var(--ink-3)}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-700);color:#fff;margin-top:0}
.footer-top{
  display:grid;grid-template-columns:1fr;gap:32px;padding:48px 0 36px;
}
@media(min-width:640px){.footer-top{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-top{grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;padding:64px 0 44px}}
.footer-brand .fb-logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:19px;margin-bottom:14px}
.footer-brand .fb-logo svg{width:30px;height:30px;color:#fff}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.72);max-width:340px}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.4px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.74);transition:color var(--ease)}
.footer-col a:hover{color:var(--brand-100);text-decoration:underline;text-underline-offset:4px}
.footer-col .contact-line{font-size:14px;color:rgba(255,255,255,.74);line-height:1.8}
.footer-col .contact-line b{color:#fff;font-weight:600}
.footer-bottom{border-top:1px solid rgba(255,255,255,.16);padding:18px 0;font-size:13px;color:rgba(255,255,255,.6)}
.footer-bottom .inner{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center}

/* ---------- sticky cta ---------- */
.sticky-cta{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:rgba(255,255,255,.98);border-top:1px solid var(--line);
  box-shadow:0 -8px 26px rgba(16,42,66,.12);padding:9px 0;
}
.sticky-cta .container{display:flex;align-items:center;gap:12px}
.sticky-cta .tip{font-size:13.5px;font-weight:600;color:var(--ink-2);flex:1;min-width:0}
.sticky-cta .btns{display:flex;gap:10px;flex:none}
@media(max-width:1023px){
  .sticky-cta{display:block}
  .page-body{padding-bottom:74px}
}

/* roulang page: category3 */
:root{
  --brand:#0E5B7A;
  --brand-700:#0A4359;
  --brand-800:#08354A;
  --brand-50:#EAF3F7;
  --brand-100:#D6E7EE;
  --accent:#FF6A2B;
  --accent-2:#16A97A;
  --bg:#F5F7F8;
  --surface:#FFFFFF;
  --band:#EEF3F6;
  --ink:#17232B;
  --ink-2:#5A6B76;
  --ink-3:#8A99A3;
  --line:#E2E8EC;
  --radius:16px;
  --radius-sm:10px;
  --shadow-1:0 1px 2px rgba(16,42,66,.05), 0 8px 24px rgba(16,42,66,.06);
  --shadow-2:0 10px 32px rgba(16,42,66,.10);
}
html{scroll-behavior:smooth}
html body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
*,*::before,*::after{box-sizing:border-box}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 24px}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.95);
  -webkit-backdrop-filter:saturate(180%) blur(10px);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .18s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 22px rgba(16,42,66,.08)}
.header-inner{display:flex;align-items:center;gap:16px;height:68px;position:relative}
.brand{display:flex;align-items:center;gap:10px;flex:none;color:var(--brand-700)}
.brand-mark{width:30px;height:30px;color:var(--brand);flex:none}
.brand-text{font-size:18px;font-weight:700;letter-spacing:.2px;white-space:nowrap}
.main-nav{display:none}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 12px;border-radius:8px;
  font-size:15px;color:var(--ink-2);
  transition:color .18s ease, background .18s ease;
}
.nav-link:hover{color:var(--brand);background:var(--brand-50)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-tools{margin-left:auto;display:flex;align-items:center;gap:10px;flex:none}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:10px;
  border:1px solid var(--line);background:#fff;color:var(--ink-2);
  cursor:pointer;transition:all .18s ease;
}
.icon-btn:hover{color:var(--brand);border-color:var(--brand-100);background:var(--brand-50)}
.nav-toggle{display:inline-flex}
@media (min-width:1024px){
  .main-nav{display:flex;align-items:center;gap:2px;margin-left:6px}
  .nav-toggle{display:none}
}
@media (max-width:1023px){
  .main-nav.open{
    display:flex;flex-direction:column;align-items:stretch;gap:2px;
    position:absolute;top:68px;left:-20px;right:-20px;
    background:#fff;border-bottom:1px solid var(--line);
    padding:12px 20px 18px;box-shadow:0 18px 30px rgba(16,42,66,.10);
  }
  .main-nav.open .nav-link{padding:12px 10px;font-size:16px;border-radius:10px}
  .main-nav.open .nav-link.active::after{display:none}
  .main-nav.open .nav-link.active{background:var(--brand-50)}
}
.search-panel{display:none;background:#fff;border-bottom:1px solid var(--line);padding:14px 0}
.search-panel.open{display:block}
.search-form{display:flex;gap:10px}
.search-form input[type="search"]{
  flex:1;height:46px;padding:0 16px;font-size:15px;color:var(--ink);
  border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff;
  transition:border-color .18s ease, box-shadow .18s ease;
}
.search-form input[type="search"]:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-100);
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:background .18s ease, color .18s ease, border-color .18s ease, transform .18s ease, box-shadow .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(14,91,122,.22)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:0 10px 26px rgba(14,91,122,.28)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand-100)}
.btn-ghost:hover{background:var(--brand-50);border-color:var(--brand)}
.btn-light{background:#fff;color:var(--brand-700)}
.btn-light:hover{background:var(--brand-50);transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:9px}
.text-link{color:var(--brand);font-weight:600;font-size:14px;display:inline-flex;align-items:center;gap:6px}
.text-link:hover{color:var(--brand-700);text-decoration:underline}

/* ---------- Page hero ---------- */
.page-hero{
  position:relative;
  padding:34px 0 54px;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(90deg,rgba(245,247,248,.97) 0%,rgba(245,247,248,.90) 46%,rgba(245,247,248,.62) 100%),url(/assets/images/backpic/back-2.png);
  background-size:cover;background-position:center right;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:16px}
.breadcrumb a{color:var(--ink-2)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb li::after{content:"/";margin-left:8px;color:var(--ink-3)}
.breadcrumb li:last-child::after{display:none}
.breadcrumb li{display:flex;align-items:center}
.breadcrumb li[aria-current]{color:var(--brand);font-weight:600}
.h1{
  font-size:clamp(28px,4.6vw,46px);font-weight:700;line-height:1.25;
  margin:0 0 14px;letter-spacing:-.4px;
}
.hero-lead{max-width:640px;font-size:17px;color:var(--ink-2);margin:0 0 22px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 20px;margin:0 0 26px}
.hero-points li{display:flex;align-items:center;gap:8px;font-size:15px;color:var(--ink-2)}
.hero-points li::before{
  content:"";width:16px;height:16px;flex:none;border-radius:50%;
  background:var(--brand-50);
  border:1.5px solid var(--accent-2);
  box-shadow:inset 0 0 0 3px #fff;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.hero-trust{margin-top:14px;font-size:13px;color:var(--ink-3)}
@media (min-width:768px){
  .page-hero{padding:48px 0 68px}
}
@media (min-width:1024px){
  .page-hero{background-position:center right;padding:52px 0 74px}
}

/* ---------- Sections ---------- */
.section{padding:52px 0}
@media (min-width:1024px){.section{padding:88px 0}}
.section-band{background:var(--band)}
.section-head{max-width:720px;margin-bottom:34px}
.h2{font-size:clamp(22px,3vw,32px);font-weight:700;line-height:1.3;margin:0 0 10px;letter-spacing:-.3px}
.section-sub{color:var(--ink-2);font-size:15px;margin:0}
.eyebrow{
  display:inline-block;font-size:12.5px;font-weight:600;letter-spacing:.08em;
  color:var(--brand);background:var(--brand-50);border:1px solid var(--brand-100);
  padding:5px 12px;border-radius:999px;margin-bottom:14px;
}

/* ---------- Filter chips ---------- */
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.chip{
  height:40px;padding:0 18px;border-radius:999px;border:1px solid var(--line);
  background:#fff;color:var(--ink-2);font-size:14px;font-weight:600;cursor:pointer;
  transition:all .18s ease;
}
.chip:hover{border-color:var(--brand-100);color:var(--brand);background:var(--brand-50)}
.chip.active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(14,91,122,.20)}

/* ---------- Resource cards ---------- */
.card-grid{display:grid;gap:24px;grid-template-columns:1fr}
@media (min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr)}}
.resource-card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .18s ease, box-shadow .18s ease;
}
.resource-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.card-media{position:relative;aspect-ratio:16/9;background:var(--band);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.resource-card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:24px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body .h3{font-size:20px;font-weight:600;line-height:1.4;margin:0}
.card-text{font-size:15px;color:var(--ink-2);margin:0}
.badge{
  display:inline-flex;align-items:center;gap:6px;align-self:flex-start;
  padding:4px 12px;border-radius:999px;font-size:12.5px;font-weight:600;
  background:var(--brand-50);color:var(--brand);border:1px solid var(--brand-100);
}
.badge-accent{background:#FFF1EA;color:#C3451A;border-color:#FFD9C6}
.badge-green{background:#E7F7F0;color:#0C7A57;border-color:#C6EBDC}
.card-facts{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:auto;padding-top:14px;border-top:1px dashed var(--line)}
.card-facts li{font-size:13px;color:var(--ink-3)}
.card-facts strong{display:block;font-size:18px;color:var(--brand);font-variant-numeric:tabular-nums;font-weight:700}
@media (max-width:767px){.card-body{padding:20px}}

/* ---------- Steps ---------- */
.steps{display:grid;gap:18px;grid-template-columns:1fr}
@media (min-width:640px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.steps{grid-template-columns:repeat(4,1fr);gap:24px}}
.step{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-1);
  transition:transform .18s ease, box-shadow .18s ease;
}
.step:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:12px;font-weight:700;font-size:15px;
  background:var(--brand-50);color:var(--brand);margin-bottom:14px;
  font-variant-numeric:tabular-nums;
}
.step .h3{font-size:18px;font-weight:600;margin:0 0 8px}
.step p{margin:0;font-size:14.5px;color:var(--ink-2)}

/* ---------- Metrics ---------- */
.metrics{
  background:linear-gradient(135deg,var(--brand) 0%,#1187A8 100%);
  border-radius:20px;padding:36px 24px;color:#fff;
  display:grid;gap:26px;grid-template-columns:repeat(2,1fr);
}
@media (min-width:1024px){.metrics{grid-template-columns:repeat(4,1fr);padding:44px 48px}}
.metric{text-align:left}
.metric .num{
  font-size:clamp(30px,4vw,40px);font-weight:700;line-height:1.1;
  color:#5FE0B0;font-variant-numeric:tabular-nums;
}
.metric .num small{font-size:15px;font-weight:600;margin-left:4px;color:#BDDCE7}
.metric .label{font-size:14px;color:#D9E9F0;margin-top:8px}

/* ---------- Service list ---------- */
.service-list{display:grid;gap:16px;grid-template-columns:1fr}
@media (min-width:768px){.service-list{grid-template-columns:repeat(2,1fr)}}
.service-item{
  display:flex;gap:16px;align-items:flex-start;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:22px 22px;min-height:88px;
  transition:background .18s ease, border-color .18s ease, transform .18s ease;
}
.service-item:hover{background:var(--brand-50);border-color:var(--brand-100);transform:translateY(-2px)}
.service-item .dot{width:10px;height:10px;border-radius:3px;background:var(--accent);flex:none;margin-top:9px}
.service-item .h3{font-size:17px;font-weight:600;margin:0 0 6px}
.service-item p{margin:0;font-size:14.5px;color:var(--ink-2)}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;margin-bottom:14px;transition:box-shadow .18s ease}
.faq-item.open{box-shadow:var(--shadow-1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.5;
}
.faq-item.open .faq-q{color:var(--brand)}
.faq-icon{flex:none;color:var(--brand);transition:transform .25s ease}
.faq-item.open .faq-icon{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a-inner{padding:0 22px 22px;font-size:15px;color:var(--ink-2)}
.faq-a-inner p{margin:0}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--brand-50);border:1px solid var(--brand-100);
  border-radius:20px;padding:44px 24px;text-align:center;
}
.cta-band .h2{margin-bottom:12px}
.cta-band p{max-width:640px;margin:0 auto 24px;color:var(--ink-2)}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}

/* ---------- Related ---------- */
.related-grid{display:grid;gap:20px;grid-template-columns:1fr}
@media (min-width:640px){.related-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.related-grid{grid-template-columns:repeat(3,1fr)}}
.related-card{
  display:flex;gap:16px;align-items:center;background:#fff;
  border:1px solid var(--line);border-radius:14px;padding:14px;
  box-shadow:var(--shadow-1);transition:transform .18s ease, box-shadow .18s ease;
}
.related-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.related-card .thumb{width:92px;height:66px;border-radius:10px;overflow:hidden;background:var(--band);flex:none}
.related-card .thumb img{width:100%;height:100%;object-fit:cover}
.related-card .h3{font-size:16px;font-weight:600;margin:0 0 4px;line-height:1.45}
.related-card span{font-size:13px;color:var(--ink-3)}

/* ---------- Footer ---------- */
.site-footer{background:var(--brand-700);color:#D8E7EE;margin-top:64px;padding-top:56px}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:.95fr 1fr 1fr 1.15fr;gap:28px}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;margin-bottom:14px}
.footer-brand svg{width:28px;height:28px;color:#7FD3EC}
.footer-brand span{font-size:18px;font-weight:700}
.footer-col p{font-size:14px;color:#AECAD6;margin:0}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin:0 0 16px;letter-spacing:.3px}
.footer-links li{margin-bottom:10px}
.footer-links a{font-size:14px;color:#C4DCE6;transition:color .18s ease}
.footer-links a:hover{color:#fff}
.footer-meta{font-size:14px;color:#C4DCE6;line-height:1.9}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.14);
  padding:18px 0 22px;font-size:13px;color:#9FB8C4;
  display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
}

/* ---------- Sticky mobile CTA ---------- */
.mobile-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:flex;align-items:center;gap:12px;
  background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -6px 20px rgba(16,42,66,.10);
  padding:10px 16px;
}
.mobile-cta .tip{font-size:13.5px;font-weight:600;color:var(--ink);flex:1;line-height:1.4}
@media (min-width:1024px){.mobile-cta{display:none}}
@media (max-width:1023px){html body{padding-bottom:78px}}

/* roulang page: category5 */
:root{
  --brand:#0E5B7A; --brand-700:#0A4359; --brand-50:#EAF3F7; --brand-100:#D6E7EE;
  --accent:#FF6A2B; --accent-2:#16A97A;
  --bg:#F5F7F8; --surface:#FFFFFF; --band:#EEF3F6;
  --ink:#17232B; --ink-2:#5A6B76; --ink-3:#8A99A3; --line:#E2E8EC;
  --radius-card:16px; --radius-img:12px; --radius-btn:10px; --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(16,42,66,.05), 0 8px 24px rgba(16,42,66,.06);
  --shadow-2:0 10px 32px rgba(16,42,66,.10);
  --t:180ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
svg{max-width:100%}
a{color:var(--brand);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){.container{padding:0 24px}}

/* 标题层级 */
h1{font-size:clamp(28px,4.4vw,48px);line-height:1.24;font-weight:700;letter-spacing:-.01em}
h2{font-size:clamp(22px,2.6vw,32px);line-height:1.3;font-weight:700;letter-spacing:-.01em}
h3{font-size:clamp(18px,1.7vw,21px);line-height:1.45;font-weight:600}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--brand);text-transform:uppercase;margin-bottom:10px}
.lead{color:var(--ink-2);font-size:16px;margin-top:12px;max-width:660px}
.num{font-variant-numeric:tabular-nums}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);backdrop-filter:blur(6px);
  transition:box-shadow var(--t);
}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(16,42,66,.07)}
.header-inner{display:flex;align-items:center;gap:20px;min-height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--brand);flex:none}
.brand:hover{color:var(--brand-700)}
.brand-mark{width:32px;height:32px;flex:none}
.brand-text{font-size:19px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.main-nav{display:none;align-items:center;gap:6px;margin-left:12px;flex:1}
.nav-link{
  position:relative;display:inline-block;padding:22px 10px;font-size:15px;font-weight:500;
  color:var(--ink-2);border-bottom:2px solid transparent;transition:color var(--t),border-color var(--t);
  white-space:nowrap;
}
.nav-link:hover{color:var(--brand)}
.nav-link.active{color:var(--brand);border-bottom-color:var(--brand);font-weight:600}
.header-tools{display:flex;align-items:center;gap:10px;margin-left:auto}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;
  border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;color:var(--ink-2);
  cursor:pointer;transition:color var(--t),background var(--t),border-color var(--t);
}
.icon-btn:hover{color:var(--brand);background:var(--brand-50);border-color:var(--brand-100)}
.nav-toggle{display:inline-flex}
.search-panel{max-height:0;overflow:hidden;background:#fff;transition:max-height .25s ease}
.search-panel.open{max-height:96px;border-top:1px solid var(--line)}
.search-form{display:flex;gap:12px;padding:14px 0}
.search-form input{
  flex:1;height:46px;border:1px solid var(--line);border-radius:var(--radius-btn);
  padding:0 16px;background:#FBFCFD;transition:border-color var(--t),box-shadow var(--t);
}
.search-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-100)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;transition:all var(--t);white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover,.btn-primary:active{background:#0A4A63;color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand-100)}
.btn-ghost:hover{background:var(--brand-50);color:var(--brand-700)}
.btn-light{background:#fff;color:var(--brand-700);border-color:rgba(255,255,255,.6)}
.btn-light:hover{background:var(--brand-50);color:var(--brand-700)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.text-link{display:inline-flex;align-items:center;gap:8px;font-weight:600;color:var(--brand)}
.text-link:hover{color:var(--brand-700);text-decoration:underline;text-underline-offset:4px}
.text-link i{font-size:12px;transition:transform var(--t)}
.text-link:hover i{transform:translateX(3px)}

/* 徽章与标签 */
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 13px;border-radius:var(--radius-pill);
  background:var(--brand-50);color:var(--brand-700);font-size:12.5px;font-weight:600;
}
.badge-accent{background:#FFF1EA;color:#C24A12}
.badge-green{background:#E7F7F1;color:#0E7A57}
.badge-hero{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.3)}

/* 页面窄幅 Hero */
.page-hero{
  position:relative;overflow:hidden;color:#fff;
  background-color:var(--brand-700);
  background-image:linear-gradient(115deg,rgba(10,67,89,.95) 0%,rgba(14,91,122,.88) 52%,rgba(17,135,168,.74) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  padding:44px 0 60px;
}
.page-hero::after{
  content:"";position:absolute;right:-70px;top:-60px;width:300px;height:300px;
  border:28px solid rgba(255,255,255,.08);border-radius:50%;pointer-events:none;
}
.page-hero h1{color:#fff;margin-top:16px;max-width:900px}
.page-hero-lead{color:rgba(255,255,255,.9);font-size:17px;margin-top:16px;max-width:640px}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;position:relative;z-index:2}
.hero-chips span{
  display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:#fff;
  background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.22);
  border-radius:var(--radius-pill);padding:6px 14px;
}
.hero-chips i{color:#7FE0BD}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;position:relative;z-index:2}
.hero-note{margin-top:16px;font-size:13.5px;color:rgba(255,255,255,.72)}

/* 面包屑 */
.breadcrumb{margin-bottom:4px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;font-size:13.5px;color:rgba(255,255,255,.78)}
.breadcrumb li{display:flex;align-items:center}
.breadcrumb li:not(:first-child)::before{content:"/";margin:0 8px;color:rgba(255,255,255,.42)}
.breadcrumb a{color:rgba(255,255,255,.82)}
.breadcrumb a:hover{color:#fff}
.breadcrumb [aria-current="page"]{color:#fff;font-weight:600}

/* 板块 */
.section{padding:64px 0}
.section-head{margin-bottom:34px}
.band-bg{background:var(--band)}
.surface-bg{background:#fff}

/* 卡片 */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);padding:24px;transition:transform var(--t),box-shadow var(--t);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.card h3{margin-bottom:10px}
.card p{color:var(--ink-2);font-size:15px}

/* 渠道区 */
.grid-channels{display:grid;gap:24px}
.channel-main{padding:28px;background:linear-gradient(180deg,#fff 0%,var(--brand-50) 100%)}
.rank{
  display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;
  border-radius:14px;background:var(--brand);color:#fff;font-weight:700;font-size:16px;
  font-variant-numeric:tabular-nums;margin-bottom:16px;
}
.dot-list{margin-top:16px;display:grid;gap:8px}
.dot-list li{position:relative;padding-left:18px;font-size:14.5px;color:var(--ink-2)}
.dot-list li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;background:var(--accent-2)}
.channel-main .text-link{margin-top:20px}
.channel-side{display:grid;gap:24px;align-content:start}
.channel-bar{
  display:flex;align-items:center;gap:18px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:22px 24px;
  transition:transform var(--t),box-shadow var(--t),background var(--t);
}
.channel-bar:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);background:var(--brand-50)}
.channel-bar .mark{
  flex:none;width:44px;height:44px;border-radius:12px;background:var(--brand-50);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;font-size:18px;
}
.channel-bar h3{font-size:18px;margin-bottom:4px}
.channel-bar p{color:var(--ink-2);font-size:14.5px}
.channel-bar .go{margin-left:auto;color:var(--brand);font-size:14px}

/* 两栏图文 */
.split{display:grid;gap:32px;align-items:center}
.split-text p{color:var(--ink-2);margin-top:14px;max-width:38em}
.check-list{margin-top:20px;display:grid;gap:10px}
.check-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--ink)}
.check-list i{color:var(--accent-2);margin-top:5px}
.split-text .text-link{margin-top:22px}
.split-media{position:relative}
.split-media img{width:100%;border-radius:var(--radius-img);object-fit:cover;aspect-ratio:4/3;box-shadow:var(--shadow-1)}
.quote-card{
  position:relative;margin-top:-46px;margin-left:auto;width:min(320px,88%);
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-2);padding:18px 20px;
}
.quote-card p{font-size:14.5px;color:var(--ink-2);margin-bottom:12px}
.quote-card footer{display:flex;align-items:center;gap:10px}
.avatar{
  width:36px;height:36px;border-radius:50%;background:var(--brand-100);color:var(--brand-700);
  display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;flex:none;
}
.quote-card .who{font-size:14px;font-weight:600;color:var(--ink);line-height:1.3}
.quote-card .role{font-size:12.5px;color:var(--ink-3);line-height:1.4}

/* 能力横排 */
.cap-row{display:grid;gap:20px}
.cap-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:22px;box-shadow:var(--shadow-1);transition:transform var(--t),box-shadow var(--t)}
.cap-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.cap-item .idx{font-size:13px;font-weight:700;color:var(--brand);letter-spacing:.1em;font-variant-numeric:tabular-nums}
.cap-item h3{font-size:17.5px;margin:10px 0 8px}
.cap-item p{color:var(--ink-2);font-size:14.5px}

/* 流程 */
.flow{display:grid;gap:20px}
.flow-item{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:24px;box-shadow:var(--shadow-1)}
.flow-item .step{
  display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;
  background:var(--brand);color:#fff;font-size:15px;font-weight:700;margin-bottom:14px;font-variant-numeric:tabular-nums;
}
.flow-item h3{font-size:17.5px;margin-bottom:8px}
.flow-item p{color:var(--ink-2);font-size:14.5px}
.flow-item::after{
  content:"";position:absolute;right:-12px;top:42px;width:12px;height:2px;background:var(--brand-100);display:none;
}

/* 联系区 */
.contact-grid{display:grid;gap:24px;align-items:start}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:26px}
.form-row{display:grid;gap:16px}
.field{display:grid;gap:8px;margin-bottom:16px}
.field label{font-size:14px;font-weight:600;color:var(--ink)}
.field input,.field select,.field textarea{
  width:100%;height:48px;border:1px solid var(--line);border-radius:var(--radius-btn);
  padding:0 14px;background:#FBFCFD;transition:border-color var(--t),box-shadow var(--t);
}
.field textarea{height:auto;min-height:120px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-100)}
.field .hint{font-size:13px;color:var(--ink-3)}
.form-foot{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:6px}
.form-foot .privacy{font-size:13px;color:var(--ink-3)}
.info-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);padding:26px}
.info-list{display:grid;gap:16px;margin-top:8px}
.info-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--ink-2)}
.info-list i{color:var(--brand);margin-top:5px;width:18px;text-align:center}
.info-list strong{color:var(--ink);font-weight:600}
.map-box{
  margin-top:22px;border-radius:var(--radius-img);background:var(--band);border:1px dashed #C8D6DE;
  min-height:180px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  color:var(--ink-3);font-size:14px;text-align:center;padding:20px;
}
.map-box i{font-size:22px;color:var(--brand)}

/* FAQ */
.faq-layout{display:grid;gap:32px;align-items:start}
.faq-list{display:grid;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-1);overflow:hidden}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 20px;background:none;border:0;text-align:left;font-size:16.5px;font-weight:600;cursor:pointer;
}
.faq-q i{color:var(--brand);font-size:14px;transition:transform var(--t);flex:none}
.faq-item.open .faq-q i{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 20px;color:var(--ink-2);font-size:15px}
.faq-item.open .faq-a{max-height:320px;padding-bottom:18px}
.tip-bar{
  margin:6px 0;padding:16px 20px;border-radius:14px;background:var(--brand-50);
  color:var(--brand-700);font-size:14.5px;display:flex;gap:12px;align-items:flex-start;
}
.tip-bar i{margin-top:4px}

/* 下一步横条 */
.next-band{background:var(--brand-50);border-top:1px solid var(--brand-100);padding:52px 0}
.next-inner{display:grid;gap:26px;align-items:center}
.next-links{display:grid;gap:12px}
.next-links a{
  display:flex;align-items:center;gap:14px;background:#fff;border:1px solid var(--brand-100);
  border-radius:14px;padding:16px 18px;color:var(--ink);font-weight:600;font-size:15px;
  transition:transform var(--t),box-shadow var(--t),color var(--t);
}
.next-links a:hover{transform:translateX(3px);box-shadow:var(--shadow-2);color:var(--brand-700)}
.next-links span{
  width:34px;height:34px;border-radius:10px;background:var(--brand-50);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;flex:none;
}
.next-links i.go{margin-left:auto;color:var(--brand);font-size:13px}

/* 页脚 */
.site-footer{background:var(--brand-700);color:#D6E7EE;padding:56px 0 0;margin-top:0}
.footer-grid{display:grid;gap:32px;padding-bottom:36px}
.footer-brand .brand{color:#fff}
.footer-brand p{color:rgba(214,231,238,.82);font-size:14.5px;margin-top:14px;max-width:32em}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.footer-tags span{font-size:12.5px;padding:4px 12px;border-radius:var(--radius-pill);background:rgba(255,255,255,.1);color:#EAF3F7}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:14px;font-weight:600}
.footer-col ul{display:grid;gap:10px}
.footer-col a{color:rgba(214,231,238,.85);font-size:14.5px}
.footer-col a:hover{color:var(--brand-100);text-decoration:underline;text-underline-offset:4px}
.footer-contact li{font-size:14.5px;color:rgba(214,231,238,.85);display:flex;gap:10px;align-items:flex-start}
.footer-contact i{color:#7FE0BD;margin-top:5px;width:16px;text-align:center}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);padding:18px 0 22px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(214,231,238,.72);
}

/* 移动端抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(10,34,46,.42);opacity:0;visibility:hidden;
  transition:opacity var(--t),visibility var(--t);z-index:79;
}
.drawer-mask.open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);background:#fff;z-index:80;
  transform:translateX(102%);transition:transform .26s ease;padding:20px;overflow-y:auto;
  display:flex;flex-direction:column;gap:18px;box-shadow:-12px 0 32px rgba(16,42,66,.14);
}
.mobile-drawer.open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.drawer-nav{display:grid;gap:4px}
.drawer-nav a{padding:13px 12px;border-radius:12px;color:var(--ink-2);font-weight:500}
.drawer-nav a:hover{background:var(--brand-50);color:var(--brand)}
.drawer-nav a.active{background:var(--brand-50);color:var(--brand);font-weight:600}
.drawer-cta{margin-top:auto}

/* 底部固定转化条 */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;display:flex;align-items:center;gap:12px;
  padding:10px 16px;background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -6px 20px rgba(16,42,66,.08);
}
.sticky-bar .tip{font-size:13.5px;font-weight:600;color:var(--ink);line-height:1.35;flex:1}
.sticky-bar .btn{height:42px;padding:0 16px;font-size:14px}

/* 响应式 */
@media (min-width:640px){
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .cap-row{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .form-row{grid-template-columns:repeat(2,1fr)}
  .next-links{grid-template-columns:repeat(3,1fr)}
}
@media (min-width:1024px){
  .main-nav{display:flex}
  .nav-toggle{display:none}
  .section{padding:88px 0}
  .page-hero{padding:56px 0 76px}
  .grid-channels{grid-template-columns:5fr 7fr}
  .split{grid-template-columns:1fr 1fr;gap:48px}
  .cap-row{grid-template-columns:repeat(4,1fr)}
  .flow{grid-template-columns:repeat(4,1fr)}
  .flow-item::after{display:block}
  .faq-layout{grid-template-columns:4fr 8fr;gap:48px}
  .contact-grid{grid-template-columns:7fr 5fr;gap:28px}
  .next-inner{grid-template-columns:4fr 8fr;gap:36px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
  .sticky-bar{display:none}
}
@media (max-width:1023px){
  body{padding-bottom:68px}
  .main-nav{display:none}
  .header-tools .btn-primary{display:none}
  .page-hero::after{width:200px;height:200px;border-width:20px;right:-70px;top:-70px}
}
@media (max-width:639px){
  .header-inner{gap:12px;min-height:62px}
  .brand-text{font-size:17px}
  .hero-actions .btn{width:100%}
  .quote-card{margin-top:16px;width:100%}
  .section{padding:52px 0}
}

/* roulang page: category4 */
:root{
  --brand:#0E5B7A;
  --brand-700:#0A4359;
  --brand-800:#083A4C;
  --brand-50:#EAF3F7;
  --brand-100:#D6E7EE;
  --accent:#FF6A2B;
  --accent-2:#16A97A;
  --bg:#F5F7F8;
  --surface:#FFFFFF;
  --band:#EEF3F6;
  --ink:#17232B;
  --ink-2:#5A6B76;
  --ink-3:#8A99A3;
  --line:#E2E8EC;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-1:0 1px 2px rgba(16,42,66,.05), 0 8px 24px rgba(16,42,66,.06);
  --shadow-2:0 10px 32px rgba(16,42,66,.10);
  --ease:180ms ease;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button,input{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:var(--brand-100);color:var(--brand-700)}
[id]{scroll-margin-top:100px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
@media (max-width:640px){.container{padding:0 20px}}

/* ============ 按钮 / 徽章 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--radius-sm);
  border:1px solid transparent;font-size:15px;font-weight:600;
  cursor:pointer;transition:all var(--ease);white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 4px 14px rgba(14,91,122,.18)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:0 10px 22px rgba(14,91,122,.26)}
.btn-primary:active{transform:translateY(0);background:var(--brand-800)}
.btn-outline{background:#fff;color:var(--brand);border-color:var(--brand-100)}
.btn-outline:hover{background:var(--brand-50);border-color:var(--brand);transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;font-size:13px;font-weight:600;
  background:var(--brand-50);color:var(--brand-700);border:1px solid var(--brand-100);
}
.chip-green{background:rgba(22,169,122,.10);color:#0E7A58;border-color:rgba(22,169,122,.22)}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;background:#fff;
  border-bottom:1px solid var(--line);transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 22px rgba(16,42,66,.08)}
.header-inner{display:flex;align-items:center;height:72px;gap:8px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--brand);flex:0 0 auto;transition:color var(--ease)}
.brand:hover{color:var(--brand-700)}
.brand-mark{width:30px;height:30px;flex:0 0 auto}
.brand-text{font-size:19px;font-weight:700;letter-spacing:.2px}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:26px}
.nav-link{
  position:relative;padding:9px 13px;border-radius:8px;
  font-size:15px;color:var(--ink-2);transition:all var(--ease);white-space:nowrap;
}
.nav-link:hover{color:var(--brand);background:var(--brand-50)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:-3px;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-tools{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:#fff;color:var(--ink-2);
  cursor:pointer;transition:all var(--ease);
}
.icon-btn:hover{color:var(--brand);border-color:var(--brand-100);background:var(--brand-50)}
.nav-toggle{display:none}
.search-panel{display:none;border-top:1px solid var(--line);background:#fff;padding:14px 0 18px}
.search-panel.is-open{display:block}
.search-form{display:flex;gap:10px}
.search-form input{
  flex:1;height:48px;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:0 16px;background:var(--surface);color:var(--ink);transition:all var(--ease);
}
.search-form input::placeholder{color:var(--ink-3)}
.search-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px var(--brand-100)}
.nav-cta-mobile{display:none}

/* ============ 窄幅 Hero ============ */
.cat-hero{
  position:relative;
  background:var(--brand-50) url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(255,255,255,.97) 0%,rgba(255,255,255,.93) 44%,rgba(214,231,238,.74) 100%);
}
.hero-inner{position:relative;z-index:2;padding:66px 0 56px}
.crumb ol{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);flex-wrap:wrap}
.crumb li+li::before{content:"/";margin-right:8px;color:var(--line)}
.crumb a:hover{color:var(--brand);text-decoration:underline}
.crumb [aria-current]{color:var(--brand);font-weight:600}
.hero-title{
  margin-top:18px;font-size:46px;line-height:1.25;font-weight:700;letter-spacing:-.5px;max-width:760px;
}
.hero-sub{margin-top:16px;font-size:17px;color:var(--ink-2);max-width:640px}
.hero-tags{margin-top:22px;display:flex;flex-wrap:wrap;gap:10px}

/* ============ 通用板块 ============ */
.section{padding:88px 0}
.section-tight{padding:56px 0}
.band{background:var(--band)}
.sec-head{margin-bottom:36px;max-width:760px}
.sec-title{font-size:30px;font-weight:700;letter-spacing:-.3px}
.sec-sub{margin-top:10px;font-size:15.5px;color:var(--ink-2)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;
  color:var(--brand);letter-spacing:1px;margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);border-radius:2px}

/* ============ 快速定位卡 ============ */
.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.quick-card{
  position:relative;display:block;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:26px 24px 24px;box-shadow:var(--shadow-1);
  transition:all var(--ease);overflow:hidden;
}
.quick-card::before{
  content:"";position:absolute;left:0;top:0;right:0;height:3px;
  background:linear-gradient(135deg,var(--brand),#1187A8);opacity:0;transition:opacity var(--ease);
}
.quick-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--brand-100)}
.quick-card:hover::before{opacity:1}
.quick-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;background:var(--brand-50);
  color:var(--brand);font-size:13px;font-weight:700;margin-bottom:14px;
}
.quick-title{font-size:18px;font-weight:600;line-height:1.5}
.quick-desc{margin-top:8px;font-size:14.5px;color:var(--ink-2);line-height:1.7}
.quick-more{display:inline-block;margin-top:16px;font-size:14px;font-weight:600;color:var(--brand)}

/* ============ 问答区 ============ */
.faq-layout{display:grid;grid-template-columns:272px 1fr;gap:44px;align-items:start}
.faq-aside{position:sticky;top:96px}
.aside-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:22px 18px;box-shadow:var(--shadow-1);
}
.aside-group+.aside-group{margin-top:18px;padding-top:18px;border-top:1px dashed var(--line)}
.aside-label{display:block;font-size:12.5px;font-weight:700;letter-spacing:.8px;color:var(--ink-3);margin-bottom:8px}
.aside-link{
  display:block;padding:9px 12px;border-radius:8px;font-size:14.5px;color:var(--ink-2);
  border-left:2px solid transparent;transition:all var(--ease);
}
.aside-link:hover{background:var(--brand-50);color:var(--brand);border-left-color:var(--brand)}
.aside-link.is-current{background:var(--brand-50);color:var(--brand);font-weight:600;border-left-color:var(--brand)}

.faq-group{margin-bottom:52px}
.faq-group:last-child{margin-bottom:0}
.group-head{display:flex;align-items:center;gap:14px;margin-bottom:8px}
.group-no{
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
  width:38px;height:38px;border-radius:11px;background:var(--brand);color:#fff;
  font-size:14px;font-weight:700;
}
.group-title{font-size:24px;font-weight:700;letter-spacing:-.2px}
.group-sub{margin:0 0 22px 52px;font-size:15px;color:var(--ink-2)}

.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-1);overflow:hidden;transition:all var(--ease);
}
.faq-item+.faq-item{margin-top:14px}
.faq-item:hover{border-color:var(--brand-100)}
.faq-item.open{border-color:var(--brand-100);box-shadow:var(--shadow-2)}
.faq-q-wrap{margin:0}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  width:100%;padding:20px 24px;background:none;border:0;text-align:left;
  font-size:17px;font-weight:600;line-height:1.6;color:var(--ink);cursor:pointer;
  transition:color var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-item.open .faq-q{color:var(--brand)}
.chev{flex:0 0 auto;color:var(--brand);transition:transform var(--ease)}
.faq-item.open .chev{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 280ms ease;padding:0 24px}
.faq-a p{font-size:15.5px;color:var(--ink-2);line-height:1.8;padding-bottom:22px}

.tip-band{
  display:flex;gap:12px;align-items:flex-start;
  margin:22px 0;padding:16px 20px;border-radius:var(--radius-md);
  background:var(--brand-50);border-left:3px solid var(--brand);
  font-size:14.5px;color:var(--brand-700);line-height:1.75;
}
.tip-band svg{flex:0 0 auto;margin-top:3px;color:var(--brand)}

.diagram{
  margin:22px 0;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-1);
}
.diagram img{width:100%;aspect-ratio:16/9;object-fit:cover}
.diagram figcaption{padding:14px 20px;font-size:13.5px;color:var(--ink-2);border-top:1px solid var(--line)}

/* ============ 指标条 ============ */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.metric{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:26px 24px;box-shadow:var(--shadow-1);transition:all var(--ease);
}
.metric:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.metric-num{font-size:36px;font-weight:700;color:var(--accent-2);line-height:1.1}
.metric-unit{font-size:14px;color:var(--ink-2);margin-left:6px}
.metric p{margin-top:10px;font-size:14.5px;color:var(--ink-2);line-height:1.7}

/* ============ CTA ============ */
.cta-band{
  background:linear-gradient(135deg,rgba(234,243,247,.96),rgba(214,231,238,.72));
  border:1px solid var(--brand-100);border-radius:20px;
  padding:52px 32px;text-align:center;
}
.cta-band h2{font-size:30px;font-weight:700}
.cta-band p{margin:14px auto 26px;max-width:620px;font-size:15.5px;color:var(--ink-2)}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}

/* ============ 下一步推荐 ============ */
.next-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.next-card{
  display:block;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-1);transition:all var(--ease);
}
.next-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.next-card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--band)}
.next-body{padding:20px 22px 22px}
.next-title{font-size:17.5px;font-weight:600;line-height:1.5}
.next-desc{margin-top:8px;font-size:14.5px;color:var(--ink-2);line-height:1.7}
.next-link{display:inline-block;margin-top:14px;font-size:14px;font-weight:600;color:var(--brand)}

/* ============ 页脚 ============ */
.site-footer{background:var(--brand-700);color:rgba(255,255,255,.76);padding:60px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.1fr;gap:40px}
.footer-brand .brand{color:#fff}
.footer-brand p{margin-top:16px;font-size:14.5px;line-height:1.8;max-width:360px;color:rgba(255,255,255,.72)}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600}
.footer-col li{margin-bottom:10px;font-size:14.5px}
.footer-col a{transition:color var(--ease)}
.footer-col a:hover{color:var(--brand-100);text-decoration:underline}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.16);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.6);
}

/* ============ 移动端底部转化条 ============ */
.mobile-cta{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:90;
  background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -8px 24px rgba(16,42,66,.10);
  align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;
}
.mobile-cta-text{font-size:13.5px;font-weight:600;color:var(--ink)}
.mobile-cta-act{display:flex;gap:8px;flex:0 0 auto}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .main-nav{
    position:fixed;top:0;right:0;height:100vh;width:min(320px,84vw);
    background:#fff;flex-direction:column;align-items:stretch;
    padding:84px 20px 28px;gap:4px;margin-left:0;
    box-shadow:-14px 0 34px rgba(16,42,66,.14);
    transform:translateX(103%);transition:transform 260ms ease;
    z-index:100;overflow-y:auto;
  }
  .main-nav.is-open{transform:translateX(0)}
  .nav-link{padding:14px 14px;font-size:16px;border-radius:10px}
  .nav-link.active::after{display:none}
  .nav-link.active{background:var(--brand-50)}
  .nav-toggle{display:inline-flex}
  .header-tools .btn-primary{display:none}
  .nav-cta-mobile{
    display:inline-flex;margin-top:18px;align-items:center;justify-content:center;
    height:46px;border-radius:var(--radius-sm);background:var(--brand);color:#fff;
    font-size:15px;font-weight:600;
  }
  .quick-grid{grid-template-columns:repeat(2,1fr)}
  .metric-grid{grid-template-columns:repeat(2,1fr)}
  .next-grid{grid-template-columns:1fr}
  .faq-layout{grid-template-columns:1fr;gap:26px}
  .faq-aside{position:static}
  .aside-card{padding:14px;display:flex;gap:10px;overflow-x:auto;scrollbar-width:thin}
  .aside-group{display:contents}
  .aside-label{display:none}
  .aside-link{white-space:nowrap;background:var(--brand-50);color:var(--brand-700);padding:8px 14px;border-radius:999px;border-left:0;font-size:14px}
  .aside-link:hover,.aside-link.is-current{border-left:0;background:var(--brand);color:#fff}
  .mobile-cta{display:flex}
  body{padding-bottom:80px}
}
@media (max-width:767px){
  .section{padding:58px 0}
  .section-tight{padding:40px 0}
  .header-inner{height:64px}
  .brand-text{font-size:17.5px}
  .hero-inner{padding:42px 0 40px}
  .hero-title{font-size:29px;letter-spacing:-.2px}
  .hero-sub{font-size:15.5px}
  .sec-title{font-size:23px}
  .group-title{font-size:20px}
  .group-sub{margin-left:0;font-size:14.5px}
  .faq-q{padding:16px 18px;font-size:15.5px}
  .faq-a{padding:0 18px}
  .faq-a p{font-size:15px}
  .cta-band{padding:36px 22px}
  .cta-band h2{font-size:23px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;gap:8px}
  .metric-num{font-size:30px}
}
@media (max-width:560px){
  .quick-grid,.metric-grid{grid-template-columns:1fr}
  .btn{width:100%}
  .cta-actions .btn{width:100%}
  .mobile-cta-act .btn{width:auto}
  .search-form{flex-direction:column}
  .hero-tags .chip{font-size:12.5px}
}