/* roulang page: index */
:root{
  --c-bg:#F5F7F9;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDF2F6;
  --c-border:#DFE7EE;
  --c-brand:#1C5D8C;
  --c-brand-strong:#123F61;
  --c-brand-soft:#E6F0F7;
  --c-accent:#D9822B;
  --c-accent-soft:#FBF0E2;
  --c-ok:#1F8A6D;
  --c-text:#16222C;
  --c-text-2:#55677A;
  --c-text-3:#8A99A8;
  --radius-card:14px;
  --radius-btn:10px;
  --shadow-sm:0 1px 2px rgba(18,63,97,.06);
  --shadow-hover:0 8px 24px -12px rgba(18,63,97,.18);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,fieldset{margin:0;padding:0}
ul,ol{list-style:none}
img{max-width:100%;display:block}
a{color:var(--c-brand);text-decoration:none;transition:color .18s ease}
a:hover{text-decoration:underline}
button{font:inherit;cursor:pointer;border:0;background:none}
input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--c-brand);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
@media (min-width:640px){.container{padding:0 24px}}
@media (min-width:1280px){.container{padding:0 32px}}

/* ---------- 头部导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#FFFFFF;border-bottom:1px solid transparent;transition:border-color .18s ease,box-shadow .18s ease}
.site-header.is-scrolled{border-bottom-color:var(--c-border);box-shadow:0 1px 2px rgba(18,63,97,.06)}
.header-top-inner{display:flex;align-items:center;gap:16px;height:64px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;text-decoration:none}
.logo:hover{text-decoration:none}
.logo-mark{width:34px;height:34px;border-radius:9px;background:var(--c-brand);display:grid;place-items:center;color:#fff;flex:0 0 auto}
.logo-text{font-size:18px;font-weight:700;color:var(--c-text);letter-spacing:-.01em;white-space:nowrap}
.search-box{
  position:relative;flex:1 1 auto;max-width:320px;display:flex;align-items:center;
  height:40px;padding:0 14px;border:1px solid var(--c-border);border-radius:999px;
  background:#F1F5F8;transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.search-box:focus-within{border-color:var(--c-brand);background:#fff;box-shadow:0 0 0 2px rgba(28,93,140,.12)}
.search-box svg{flex:0 0 auto;color:var(--c-text-3)}
.search-box input{border:0;background:transparent;outline:none;width:100%;padding:0 8px;font-size:14px}
.search-box input::placeholder{color:var(--c-text-3)}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto;flex:0 0 auto}
.link-quiet{font-size:14px;color:var(--c-text-2)}
.link-quiet:hover{color:var(--c-brand);text-decoration:none}
.header-tabs{border-top:1px solid var(--c-border)}
.tabs-scroll{display:flex;align-items:center;gap:8px;height:48px;overflow-x:auto;scroll-snap-type:x proximity;scrollbar-width:none;-ms-overflow-style:none}
.tabs-scroll::-webkit-scrollbar{display:none}
.tab{
  flex:0 0 auto;display:inline-flex;align-items:center;height:32px;padding:0 15px;
  border:1px solid var(--c-border);border-radius:999px;background:#fff;
  color:var(--c-text-2);font-size:14px;font-weight:500;scroll-snap-align:start;
  transition:color .18s ease,border-color .18s ease,background .18s ease;
}
.tab:hover{color:var(--c-brand);border-color:var(--c-brand);text-decoration:none}
.tab.is-active{background:var(--c-brand);border-color:var(--c-brand);color:#fff}
.tab.is-active:hover{color:#fff}
@media (max-width:767px){
  .search-box{display:none}
  .header-actions .link-quiet{display:none}
  .header-top-inner{height:56px}
  .logo-text{font-size:17px}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;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(--c-brand);color:#fff}
.btn-primary:hover{background:var(--c-brand-strong);color:#fff;text-decoration:none;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;border-color:var(--c-border);color:var(--c-text)}
.btn-ghost:hover{border-color:var(--c-brand);color:var(--c-brand);background:var(--c-brand-soft);text-decoration:none}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn-accent-ghost{background:#fff;border-color:var(--c-border);color:var(--c-brand)}
.btn-accent-ghost:hover{border-color:var(--c-accent);color:var(--c-accent);background:var(--c-accent-soft);text-decoration:none}

/* ---------- 通用板块 ---------- */
.section{padding:64px 0}
.section-alt{background:#fff}
@media (max-width:767px){.section{padding:40px 0}}
.eyebrow{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--c-brand)}
.section-title{font-size:28px;font-weight:700;line-height:1.3;letter-spacing:-.01em;margin-top:10px}
.section-desc{color:var(--c-text-2);font-size:15px;max-width:660px;margin-top:10px}
@media (max-width:767px){.section-title{font-size:22px}}
.section-head{margin-bottom:8px}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#FFFFFF 0%,#EAF1F6 100%)}
.hero-bg{
  position:absolute;inset:0;pointer-events:none;opacity:.08;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center right;background-repeat:no-repeat;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(28,93,140,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(28,93,140,.04) 1px,transparent 1px);
  background-size:44px 44px;
}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1fr;gap:36px;padding-top:52px;padding-bottom:56px}
.hero-copy{max-width:560px}
.hero h1{font-size:28px;font-weight:700;line-height:1.25;letter-spacing:-.01em;margin-top:12px}
.hero-sub{font-size:17px;color:var(--c-text-2);margin-top:16px;line-height:1.7}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-trust{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:26px}
.hero-trust li{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-text-2)}
.hero-trust li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-ok);flex:0 0 auto}
.hero-visual{display:none}
@media (min-width:1024px){
  .hero-inner{grid-template-columns:minmax(0,560px) 1fr;align-items:center;gap:56px;padding-top:76px;padding-bottom:88px}
  .hero h1{font-size:40px}
  .hero-sub{font-size:18px}
  .hero-visual{display:block}
  .hero-visual img{width:100%;height:auto;border-radius:var(--radius-card);box-shadow:0 18px 48px -28px rgba(18,63,97,.35);object-fit:cover}
}

/* ---------- 指标看板 ---------- */
.metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:32px}
@media (min-width:1024px){.metric-grid{grid-template-columns:repeat(4,1fr);gap:24px}}
.metric-card{
  position:relative;background:#fff;border:1px solid var(--c-border);border-radius:var(--radius-card);
  padding:22px 20px 24px;box-shadow:var(--shadow-sm);overflow:hidden;
}
.metric-label{font-size:13px;color:var(--c-text-3);margin-bottom:10px}
.metric-value{font-size:32px;font-weight:700;color:var(--c-brand-strong);line-height:1.1;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.metric-unit{font-size:14px;font-weight:600;color:var(--c-text-2);margin-left:4px}
.metric-card.is-lead::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--c-brand)}
@media (min-width:1024px){.metric-value{font-size:36px}}

/* ---------- 服务矩阵（非对称 Bento） ---------- */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:20px;margin-top:32px}
.bento-card{
  grid-column:span 12;display:flex;flex-direction:column;gap:12px;
  background:#fff;border:1px solid var(--c-border);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease;
}
.bento-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.bento-card.is-feature{background:var(--c-brand-soft);border-color:#CFE2F0}
.bento-num{font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--c-accent);font-variant-numeric:tabular-nums}
.bento-title{font-size:19px;font-weight:600;line-height:1.4}
.bento-text{font-size:14.5px;color:var(--c-text-2);line-height:1.75}
.arrow-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-brand);margin-top:auto;transition:gap .18s ease,color .18s ease}
.arrow-link:hover{text-decoration:none;gap:10px;color:var(--c-brand-strong)}
@media (min-width:1024px){
  .span-7{grid-column:span 7}
  .span-5{grid-column:span 5}
  .bento-card{padding:28px}
}
/* ---------- 操作路径 ---------- */
.path-list{margin-top:32px;border-top:1px solid var(--c-border)}
.path-item{display:grid;grid-template-columns:48px 1fr;gap:18px;padding:22px 0;border-bottom:1px solid var(--c-border);align-items:start}
.path-num{font-size:22px;font-weight:700;color:var(--c-accent);line-height:1.2;font-variant-numeric:tabular-nums}
.path-title{font-size:18px;font-weight:600;margin-bottom:6px}
.path-text{font-size:15px;color:var(--c-text-2);line-height:1.8}
@media (min-width:1024px){
  .path-list{display:grid;grid-template-columns:1fr 1fr;column-gap:48px}
  .path-item{grid-template-columns:56px 1fr}
}

/* ---------- 结果对比 ---------- */
.compare{margin-top:32px;background:#fff;border:1px solid var(--c-border);border-radius:var(--radius-card);padding:8px 24px;box-shadow:var(--shadow-sm)}
.compare-row{padding:18px 0;border-bottom:1px dashed var(--c-border)}
.compare-row:last-child{border-bottom:0}
.compare-label{font-size:15px;font-weight:600;margin-bottom:10px;display:block}
.compare-bars{display:grid;gap:10px}
.bar-line{display:grid;grid-template-columns:88px 1fr 54px;align-items:center;gap:12px;min-height:24px}
.bar-name{font-size:13px;color:var(--c-text-3)}
.bar-track{height:10px;border-radius:999px;background:var(--c-surface-2);overflow:hidden}
.bar-fill{height:100%;border-radius:999px;background:var(--c-brand)}
.bar-fill.is-ok{background:var(--c-ok)}
.bar-fill.is-muted{background:#B9C8D6}
.bar-value{font-size:14px;font-weight:600;color:var(--c-text-2);text-align:right;font-variant-numeric:tabular-nums}
@media (min-width:768px){
  .compare-row{display:grid;grid-template-columns:220px 1fr;gap:28px;align-items:center;padding:20px 0}
  .compare-label{margin-bottom:0}
}

/* ---------- 最新信息（CMS 区） ---------- */
.news-grid{display:grid;grid-template-columns:1fr;gap:22px;margin-top:32px}
@media (min-width:640px){.news-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr)}}
.news-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--c-border);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease;text-decoration:none;color:inherit;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);text-decoration:none}
.news-cover{aspect-ratio:16/10;background:var(--c-surface-2);overflow:hidden}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.news-card:hover .news-cover img{transform:scale(1.03)}
.news-body{display:flex;flex-direction:column;gap:10px;padding:20px;flex:1}
.news-badge{align-self:flex-start;font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;background:var(--c-brand-soft);color:var(--c-brand)}
.news-title{
  font-size:18px;font-weight:600;line-height:1.45;color:var(--c-text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card:hover .news-title{color:var(--c-brand)}
.news-excerpt{
  font-size:14px;color:var(--c-text-2);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  margin-top:auto;padding-top:12px;border-top:1px solid var(--c-border);
  font-size:13px;color:var(--c-text-3);
}
.news-foot .arrow-link{margin-top:0;font-size:13px}
.empty-state{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:56px 20px;border:1px dashed var(--c-border);border-radius:var(--radius-card);
  background:#fff;text-align:center;
}
.empty-state .empty-icon{width:56px;height:56px;border-radius:16px;background:var(--c-surface-2);display:grid;place-items:center;color:var(--c-text-3)}
.empty-state p{font-size:14px;color:var(--c-text-3)}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;margin-top:32px;max-width:860px}
.faq-item{background:#fff;border:1px solid var(--c-border);border-radius:12px;box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color .18s ease}
.faq-item.is-open{border-color:#CFE2F0}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  text-align:left;padding:18px 20px;font-size:16px;font-weight:600;color:var(--c-text);
  transition:color .18s ease;
}
.faq-q:hover{color:var(--c-brand)}
.faq-icon{position:relative;flex:0 0 auto;width:16px;height:16px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-brand);border-radius:2px;
  transform:translate(-50%,-50%);transition:transform .2s ease,opacity .2s ease;
}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease}
.faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.85;color:var(--c-text-2)}

/* ---------- 转化表单 ---------- */
.contact-wrap{display:grid;grid-template-columns:1fr;gap:32px;align-items:start}
@media (min-width:1024px){.contact-wrap{grid-template-columns:1fr 460px;gap:56px}}
.bullet-list{display:grid;gap:12px;margin-top:22px}
.bullet-list li{position:relative;padding-left:20px;font-size:15px;color:var(--c-text-2);line-height:1.75}
.bullet-list li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;background:var(--c-brand)}
.contact-form{
  background:#fff;border:1px solid var(--c-border);border-radius:16px;padding:24px;
  box-shadow:0 8px 24px -18px rgba(18,63,97,.22);display:grid;gap:16px;
}
.field{display:grid;gap:7px}
.field label{font-size:13px;color:var(--c-text-3)}
.field input,.field select,.field textarea{
  width:100%;height:44px;padding:0 14px;border:1px solid var(--c-border);border-radius:var(--radius-btn);
  background:#fff;outline:none;transition:border-color .18s ease,box-shadow .18s ease;font-size:15px;
}
.field textarea{height:auto;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--c-brand);box-shadow:0 0 0 2px rgba(28,93,140,.12)}
.field input::placeholder,.field textarea::placeholder{color:var(--c-text-3)}
.form-note{font-size:12.5px;color:var(--c-text-3);line-height:1.7}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-brand-strong);color:#BFD4E3;margin-top:72px;padding-top:56px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.9fr 1fr 1fr 1.3fr}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .logo-mark{background:#fff;color:var(--c-brand-strong)}
.footer-brand span{font-size:17px;font-weight:700;color:#fff}
.footer-text{font-size:14px;line-height:1.85;color:#A9C2D4;max-width:340px}
.footer-title{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px}
.footer-links{display:grid;gap:10px;font-size:14px}
.site-footer a{color:#BFD4E3}
.site-footer a:hover{color:#fff;text-decoration:none}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);margin-top:44px;padding:18px 0;
  display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
  font-size:13px;color:#8FA9BC;
}

/* roulang page: article */
:root{
  --c-bg:#F5F7F9;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDF2F6;
  --c-border:#DFE7EE;
  --c-brand:#1C5D8C;
  --c-brand-strong:#123F61;
  --c-brand-soft:#E6F0F7;
  --c-accent:#D9822B;
  --c-accent-soft:#FBF0E2;
  --c-ok:#1F8A6D;
  --c-text:#16222C;
  --c-text-2:#55677A;
  --c-text-3:#8A99A8;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-1:0 1px 2px rgba(18,63,97,.06);
  --shadow-2:0 8px 24px -12px rgba(18,63,97,.18);
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--c-brand);text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease;}
a:hover{text-decoration:underline;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;}
:focus-visible{outline:2px solid var(--c-brand);outline-offset:2px;border-radius:6px;}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--c-text);letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px;}
@media (min-width:640px){.container{padding-left:24px;padding-right:24px;}}
@media (min-width:1024px){.container{padding-left:32px;padding-right:32px;}}
.tnum{font-variant-numeric:tabular-nums;}

/* ---------- 按钮与标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:14px;font-weight:600;line-height:1;padding:12px 20px;
  transition:transform .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease;
  text-decoration:none;white-space:nowrap;
}
.btn:hover{text-decoration:none;}
.btn-primary{background:var(--c-brand);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--c-brand-strong);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-secondary{background:var(--c-surface);color:var(--c-brand);border-color:var(--c-border);}
.btn-secondary:hover{border-color:var(--c-brand);color:var(--c-brand);background:var(--c-brand-soft);transform:translateY(-1px);}
.btn-secondary:active{transform:translateY(0);}
.btn-sm{padding:9px 16px;font-size:13px;}
.link-quiet{font-size:14px;color:var(--c-text-2);}
.link-quiet:hover{color:var(--c-brand);}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;border-radius:999px;font-size:13px;
  background:var(--c-brand-soft);color:var(--c-brand);border:1px solid transparent;
}
.chip-plain{background:var(--c-surface);border-color:var(--c-border);color:var(--c-text-2);}
.section-label{
  display:inline-block;font-size:12px;letter-spacing:.08em;color:var(--c-brand);
  text-transform:uppercase;font-weight:600;margin-bottom:10px;
}
.arrow-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-brand);}
.arrow-link svg{transition:transform .18s ease;}
.arrow-link:hover svg{transform:translateX(3px);}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:var(--c-surface);
  border-bottom:1px solid transparent;transition:box-shadow .2s ease,border-color .2s ease;
}
.site-header.is-stuck{border-bottom-color:var(--c-border);box-shadow:0 4px 16px -12px rgba(18,63,97,.28);}
.header-top-inner{display:flex;align-items:center;gap:16px;height:64px;}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--c-text);text-decoration:none;}
.logo:hover{text-decoration:none;}
.logo-mark{
  width:32px;height:32px;border-radius:10px;background:var(--c-brand-soft);color:var(--c-brand);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.logo-text{font-size:18px;font-weight:700;letter-spacing:.01em;white-space:nowrap;}
.search-box{
  display:flex;align-items:center;gap:8px;height:40px;width:260px;max-width:320px;
  padding:0 14px;border:1px solid var(--c-border);border-radius:999px;
  background:var(--c-surface-2);color:var(--c-text-3);transition:border-color .18s ease,box-shadow .18s ease,background-color .18s ease;
}
.search-box:focus-within{border-color:var(--c-brand);background:var(--c-surface);box-shadow:0 0 0 2px var(--c-brand-soft);}
.search-box input{flex:1;min-width:0;border:none;background:transparent;outline:none;font-size:14px;color:var(--c-text);}
.search-box input::placeholder{color:var(--c-text-3);}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:18px;}
.header-tabs{border-top:1px solid var(--c-border);}
.tabs-scroll{
  display:flex;align-items:center;gap:10px;height:48px;overflow-x:auto;
  scroll-snap-type:x mandatory;-ms-overflow-style:none;scrollbar-width:none;
}
.tabs-scroll::-webkit-scrollbar{display:none;}
.tab{
  flex:0 0 auto;scroll-snap-align:start;padding:8px 16px;border-radius:999px;
  border:1px solid var(--c-border);background:var(--c-surface);color:var(--c-text-2);
  font-size:14px;line-height:1;white-space:nowrap;transition:all .18s ease;
}
.tab:hover{border-color:var(--c-brand);color:var(--c-brand);text-decoration:none;background:var(--c-brand-soft);}
.tab.is-active{background:var(--c-brand);border-color:var(--c-brand);color:#fff;}
.tab.is-active:hover{background:var(--c-brand-strong);color:#fff;}
@media (max-width:1023px){.search-box{display:none;}}
@media (max-width:640px){
  .header-top-inner{height:56px;gap:10px;}
  .logo-text{font-size:16px;}
  .link-quiet{display:none;}
  .header-actions{gap:10px;}
}

/* ---------- 面包屑与文章头 ---------- */
.crumb-bar{padding-top:20px;font-size:13px;color:var(--c-text-3);}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumb a{color:var(--c-text-2);}
.crumb a:hover{color:var(--c-brand);}
.crumb .sep{color:var(--c-text-3);}
.crumb .current{color:var(--c-text);font-weight:600;}

.article-hero{
  padding:14px 0 34px;border-bottom:1px solid var(--c-border);
  background-color:#F7FAFC;
  background-image:
    linear-gradient(90deg,rgba(28,93,140,.035) 1px,transparent 1px),
    linear-gradient(180deg,rgba(28,93,140,.035) 1px,transparent 1px),
    linear-gradient(180deg,#F8FBFD 0%,#F5F7F9 100%);
  background-size:24px 24px,24px 24px,100% 100%;
}
.article-hero h1{
  max-width:800px;font-size:26px;line-height:1.32;margin-top:18px;
}
@media (min-width:1024px){.article-hero h1{font-size:36px;}}
.article-lead{
  max-width:760px;margin-top:14px;font-size:15px;line-height:1.85;color:var(--c-text-2);
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:20px;
  font-size:13px;color:var(--c-text-2);
}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:6px;}
.meta-tag{background:var(--c-brand-soft);color:var(--c-brand);padding:4px 10px;border-radius:999px;font-size:12px;font-weight:600;}
.meta-divider{width:1px;height:12px;background:var(--c-border);}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.hero-tags .chip{background:var(--c-surface);border-color:var(--c-border);color:var(--c-text-2);font-weight:500;}

/* ---------- 正文布局 ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr);gap:32px;padding:36px 0 56px;
}
@media (min-width:1024px){
  .article-layout{grid-template-columns:minmax(0,760px) 260px;justify-content:center;gap:48px;padding:48px 0 72px;}
}
.article-body{font-size:17px;line-height:1.9;color:var(--c-text);word-wrap:break-word;}
.article-body > *:first-child{margin-top:0;}
.article-body > p:first-of-type{font-size:18px;color:var(--c-text-2);line-height:1.9;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  position:relative;font-size:22px;line-height:1.4;margin:48px 0 16px;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--c-brand);
}
.article-body h3{font-size:20px;font-weight:600;margin:32px 0 12px;}
@media (min-width:1024px){
  .article-body h2{font-size:24px;}
}
.article-body ul{margin:0 0 1.2em;list-style:none;}
.article-body ul > li{position:relative;padding-left:20px;margin-bottom:8px;}
.article-body ul > li::before{
  content:"";position:absolute;left:3px;top:.78em;width:6px;height:6px;border-radius:50%;background:var(--c-brand);
}
.article-body ol{margin:0 0 1.2em;padding-left:22px;}
.article-body ol > li{margin-bottom:8px;}
.article-body blockquote{
  margin:24px 0;padding:20px;background:var(--c-brand-soft);border-left:3px solid var(--c-brand);
  border-radius:0 var(--radius-img) var(--radius-img) 0;color:var(--c-text-2);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--radius-img);background:var(--c-surface-2);margin:24px auto;}
.article-body figure{margin:24px 0;}
.article-body figcaption{font-size:13px;color:var(--c-text-3);text-align:center;margin-top:10px;}
.article-body a{color:var(--c-brand);text-decoration:underline;}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--c-border);padding:10px 12px;text-align:left;}
.article-body th{background:var(--c-surface-2);font-weight:600;}
.article-body code{background:var(--c-surface-2);padding:2px 6px;border-radius:6px;font-size:14px;}
.article-body hr{border:none;border-top:1px solid var(--c-border);margin:36px 0;}
.empty-state{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-card);
  padding:48px 24px;text-align:center;box-shadow:var(--shadow-1);
}
.empty-state p{font-size:16px;color:var(--c-text-2);margin-bottom:16px;}

/* ---------- 目录卡 ---------- */
.toc-card{
  display:none;background:var(--c-surface);border:1px solid var(--c-border);
  border-radius:var(--radius-card);padding:20px;box-shadow:var(--shadow-1);
  align-self:start;position:sticky;top:132px;max-height:calc(100vh - 170px);overflow:auto;
}
@media (min-width:1024px){.toc-card{display:block;}}
.toc-title{font-size:12px;letter-spacing:.08em;color:var(--c-brand);font-weight:700;margin-bottom:14px;}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-link{
  display:block;font-size:13px;line-height:1.6;color:var(--c-text-2);
  padding:6px 10px;border-left:2px solid var(--c-border);border-radius:0 8px 8px 0;
}
.toc-link:hover{color:var(--c-brand);background:var(--c-brand-soft);text-decoration:none;}
.toc-link.is-sub{padding-left:20px;font-size:12.5px;color:var(--c-text-3);}
.toc-link.is-current{color:var(--c-brand);border-left-color:var(--c-brand);background:var(--c-brand-soft);font-weight:600;}

/* ---------- 相关内容 ---------- */
.after-article{background:var(--c-surface);border-top:1px solid var(--c-border);padding:56px 0;}
@media (max-width:640px){.after-article{padding:40px 0;}}
.block-head{margin-bottom:28px;}
.block-head h2{font-size:22px;}
@media (min-width:1024px){.block-head h2{font-size:26px;}}
.block-head p{margin-top:10px;font-size:14px;color:var(--c-text-2);}
.related-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:20px;}
@media (min-width:640px){.related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.related-grid{grid-template-columns:repeat(3,minmax(0,1fr));}}
.related-card{
  display:flex;flex-direction:column;background:var(--c-surface);
  border:1px solid var(--c-border);border-radius:var(--radius-card);overflow:hidden;
  box-shadow:var(--shadow-1);transition:transform .18s ease,box-shadow .18s ease;color:inherit;
}
.related-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);text-decoration:none;}
.related-card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--c-surface-2);}
.related-body{padding:18px 20px 20px;}
.related-body .chip{margin-bottom:10px;}
.related-body h3{font-size:17px;line-height:1.5;margin-bottom:8px;}
.related-card:hover h3{color:var(--c-brand);}
.related-body p{font-size:14px;color:var(--c-text-2);line-height:1.7;}
.related-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:14px;padding-top:12px;border-top:1px solid var(--c-border);
  font-size:13px;color:var(--c-text-3);
}

.prevnext{display:grid;grid-template-columns:minmax(0,1fr);gap:16px;margin-top:32px;}
@media (min-width:768px){.prevnext{grid-template-columns:repeat(2,minmax(0,1fr));}}
.pn-card{
  display:block;background:var(--c-surface-2);border:1px solid var(--c-border);
  border-radius:var(--radius-card);padding:20px 22px;color:inherit;transition:border-color .18s ease,background-color .18s ease,transform .18s ease;
}
.pn-card:hover{border-color:var(--c-brand);background:var(--c-brand-soft);transform:translateY(-2px);text-decoration:none;}
.pn-card .pn-label{font-size:12px;letter-spacing:.08em;color:var(--c-brand);font-weight:600;}
.pn-card h3{font-size:16px;margin-top:8px;line-height:1.55;}
.pn-card p{font-size:13px;color:var(--c-text-2);margin-top:8px;}

/* ---------- CTA 条 ---------- */
.cta-band{padding:0 0 64px;}
.cta-inner{
  display:flex;flex-direction:column;gap:20px;
  background:var(--c-brand-soft);border:1px solid var(--c-border);border-radius:16px;
  padding:28px 24px;
}
@media (min-width:900px){
  .cta-inner{flex-direction:row;align-items:center;justify-content:space-between;padding:32px 36px;}
}
.cta-inner h2{font-size:20px;}
.cta-inner p{font-size:14px;color:var(--c-text-2);margin-top:8px;max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-brand-strong);color:#D7E3EC;padding:52px 0 24px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:28px;}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;}}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:#fff;}
.footer-brand .logo-mark{background:rgba(255,255,255,.12);color:#fff;}
.footer-text{font-size:14px;line-height:1.8;color:#A9C2D4;margin-top:14px;max-width:420px;}
.footer-title{font-size:14px;color:#fff;margin-bottom:14px;font-weight:600;}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:#B7CDDD;}
.footer-links a:hover{color:#fff;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  margin-top:36px;padding-top:18px;border-top:1px solid rgba(255,255,255,.14);
  font-size:13px;color:#96B0C4;
}

/* roulang page: category1 */
:root{
  --c-bg:#F5F7F9;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDF2F6;
  --c-border:#DFE7EE;
  --c-brand:#1C5D8C;
  --c-brand-strong:#123F61;
  --c-brand-soft:#E6F0F7;
  --c-accent:#D9822B;
  --c-accent-soft:#FBF0E2;
  --c-ok:#1F8A6D;
  --c-text:#16222C;
  --c-text-2:#55677A;
  --c-text-3:#8A99A8;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(18,63,97,.06);
  --sh-2:0 8px 24px -12px rgba(18,63,97,.18);
  --t:.18s ease;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
}
img{max-width:100%;display:block;}
a{color:var(--c-brand);text-decoration:none;}
a:hover{text-decoration:underline;}
button{font-family:inherit;}
input,button,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;letter-spacing:-0.01em;color:var(--c-text);}
p{margin:0;}
ul{margin:0;padding:0;}
:focus-visible{outline:2px solid var(--c-brand);outline-offset:2px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 16px;
}
@media (min-width:1024px){.container{padding:0 24px;}}
@media (min-width:1280px){.container{padding:0 32px;}}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:0;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
  text-decoration:none;
}
.btn:hover{text-decoration:none;}
.btn-primary{background:var(--c-brand);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--c-brand-strong);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:var(--c-surface);color:var(--c-brand-strong);border-color:var(--c-border);}
.btn-ghost:hover{border-color:var(--c-brand);color:var(--c-brand);background:var(--c-brand-soft);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}
.link-quiet{font-size:14px;color:var(--c-text-2);text-decoration:none;border-bottom:1px solid transparent;transition:color var(--t),border-color var(--t);}
.link-quiet:hover{color:var(--c-brand);border-bottom-color:var(--c-brand);text-decoration:none;}

/* ============ 头部 ============ */
.site-header{
  position:sticky;top:0;z-index:60;background:var(--c-surface);
  border-bottom:1px solid var(--c-border);
  transition:box-shadow var(--t);
}
.site-header.is-scrolled{box-shadow:0 1px 2px rgba(18,63,97,.06),0 10px 24px -20px rgba(18,63,97,.35);}
.header-top-inner{display:flex;align-items:center;gap:18px;padding:12px 0;}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto;}
.logo:hover{text-decoration:none;}
.logo-mark{
  width:34px;height:34px;border-radius:10px;background:var(--c-brand);color:#fff;
  display:grid;place-items:center;flex:0 0 auto;
}
.logo-text{font-size:18px;font-weight:700;color:var(--c-brand-strong);letter-spacing:-0.01em;}
.search-box{
  display:flex;align-items:center;gap:8px;
  width:300px;height:40px;padding:0 14px;
  background:var(--c-surface-2);border:1px solid var(--c-border);border-radius:var(--r-pill);
  color:var(--c-text-3);transition:border-color var(--t),box-shadow var(--t),background var(--t);
}
.search-box svg{flex:0 0 auto;}
.search-box input{border:0;background:transparent;outline:none;width:100%;font-size:14px;color:var(--c-text);}
.search-box input::placeholder{color:var(--c-text-3);}
.search-box:focus-within{border-color:var(--c-brand);background:var(--c-surface);box-shadow:0 0 0 3px var(--c-brand-soft);}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:18px;}
.header-tabs{border-top:1px solid var(--c-border);background:var(--c-surface);}
.tabs-scroll{
  display:flex;gap:10px;overflow-x:auto;scroll-snap-type:x proximity;
  padding:10px 0;scrollbar-width:none;-ms-overflow-style:none;
}
.tabs-scroll::-webkit-scrollbar{display:none;}
.tab{
  flex:0 0 auto;scroll-snap-align:start;
  display:inline-flex;align-items:center;height:36px;padding:0 16px;
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-pill);
  font-size:14px;color:var(--c-text-2);white-space:nowrap;
  transition:background var(--t),color var(--t),border-color var(--t);
}
.tab:hover{background:var(--c-brand-soft);border-color:var(--c-brand);color:var(--c-brand);text-decoration:none;}
.tab.is-active{background:var(--c-brand);border-color:var(--c-brand);color:#fff;font-weight:600;}
@media (max-width:1023px){
  .search-box{display:none;}
  .header-actions .link-quiet{display:none;}
}
@media (max-width:520px){
  .header-actions .btn{padding:0 14px;font-size:13px;}
  .logo-text{font-size:16px;}
}

/* ============ 面包屑 ============ */
.crumb-bar{padding:16px 0 0;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);}
.breadcrumb a{color:var(--c-text-3);text-decoration:none;}
.breadcrumb a:hover{color:var(--c-brand);text-decoration:underline;}
.breadcrumb .sep{color:#C4CFD9;}
.breadcrumb .current{color:var(--c-text-2);}

/* ============ 分类 Hero ============ */
.cat-hero{
  position:relative;overflow:hidden;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--c-border);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:repeating-linear-gradient(0deg,rgba(18,63,97,.035) 0 1px,transparent 1px 26px),
                   repeating-linear-gradient(90deg,rgba(18,63,97,.035) 0 1px,transparent 1px 26px);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;z-index:0;
  background:linear-gradient(180deg,rgba(255,255,255,.93) 0%,rgba(234,241,246,.96) 100%);
}
.cat-hero-inner{position:relative;z-index:1;padding:52px 0 44px;max-width:860px;}
.kicker{
  display:inline-block;font-size:12px;letter-spacing:.08em;font-weight:700;
  color:var(--c-brand);text-transform:uppercase;
}
.cat-hero h1{
  margin-top:12px;font-size:40px;line-height:1.25;font-weight:700;
}
.hero-lead{margin-top:16px;font-size:17px;line-height:1.75;color:var(--c-text-2);max-width:660px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px;}
.meta-chip{
  display:inline-flex;align-items:center;gap:6px;
  height:28px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--c-surface);border:1px solid var(--c-border);
  font-size:13px;color:var(--c-text-2);
}
.meta-chip .dot{width:6px;height:6px;border-radius:50%;background:var(--c-ok);display:inline-block;}
.anchor-pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.pill-link{
  display:inline-flex;align-items:center;height:34px;padding:0 14px;
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-pill);
  font-size:13px;color:var(--c-text-2);text-decoration:none;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t);
}
.pill-link:hover{background:var(--c-brand-soft);border-color:var(--c-brand);color:var(--c-brand);text-decoration:none;transform:translateY(-1px);}
@media (max-width:640px){
  .cat-hero-inner{padding:36px 0 32px;}
  .cat-hero h1{font-size:28px;}
  .hero-lead{font-size:16px;}
}

/* ============ 分节 ============ */
.section{padding:56px 0;}
.section-alt{background:var(--c-surface);border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border);}
@media (min-width:1024px){.section{padding:72px 0;}}
.section-head{max-width:720px;margin-bottom:28px;}
.section-head h2{font-size:28px;font-weight:700;line-height:1.3;}
.section-head p{margin-top:12px;font-size:15px;color:var(--c-text-2);}
@media (max-width:640px){.section-head h2{font-size:22px;}}

.grid-split{display:grid;grid-template-columns:1fr;gap:24px;align-items:start;}
.section-card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);
  transition:box-shadow var(--t),transform var(--t);
}
.section-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.num-badge{
  display:inline-flex;align-items:center;
  height:24px;padding:0 10px;border-radius:var(--r-pill);
  background:var(--c-brand-soft);color:var(--c-brand);
  font-size:12px;font-weight:700;letter-spacing:.08em;
  font-variant-numeric:tabular-nums;
}
.section-card h2{margin-top:14px;font-size:26px;font-weight:700;line-height:1.32;}
.section-card p{margin-top:14px;font-size:15px;line-height:1.8;color:var(--c-text-2);}
@media (max-width:640px){.section-card{padding:20px;}.section-card h2{font-size:21px;}}

.check-list{margin-top:18px;list-style:none;}
.check-list li{
  position:relative;padding-left:22px;margin-bottom:10px;
  font-size:15px;line-height:1.75;color:var(--c-text-2);
}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:9px;height:9px;border-radius:50%;
  background:var(--c-brand-soft);box-shadow:inset 0 0 0 2px var(--c-brand);
}
.check-list li:last-child{margin-bottom:0;}

.split-side{display:flex;flex-direction:column;gap:12px;}
.side-media{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);padding:12px;box-shadow:var(--sh-1);}
.side-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:12px;background:var(--c-surface-2);}
.side-note{font-size:13px;color:var(--c-text-3);padding:4px 4px 0;line-height:1.7;}
.side-card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh-1);
}
.side-card .side-title{font-size:14px;font-weight:600;color:var(--c-text);}
.side-card ul{margin-top:12px;list-style:none;}
.side-card li{
  position:relative;padding-left:18px;margin-bottom:9px;font-size:14px;line-height:1.7;color:var(--c-text-2);
}
.side-card li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--c-accent);
}
.side-card li:last-child{margin-bottom:0;}
@media (min-width:1024px){
  .grid-7-5{grid-template-columns:7fr 5fr;}
  .grid-5-7{grid-template-columns:5fr 7fr;}
  .grid-5-7 .split-main{order:2;}
  .grid-5-7 .split-side{order:1;}
}

/* ============ 步骤路径 ============ */
.steps{display:grid;grid-template-columns:1fr;gap:12px;margin-top:20px;}
@media (min-width:640px){.steps{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.steps{grid-template-columns:repeat(4,1fr);}}
.step{
  background:var(--c-surface-2);border:1px solid var(--c-border);border-radius:12px;
  padding:16px;transition:border-color var(--t),background var(--t);
}
.step:hover{border-color:#C9DAE6;background:#EAF1F6;}
.step-num{font-size:12px;font-weight:700;color:var(--c-accent);letter-spacing:.08em;font-variant-numeric:tabular-nums;}
.step-title{margin-top:8px;font-size:15px;font-weight:600;color:var(--c-text);}
.step-desc{margin-top:6px;font-size:13px;line-height:1.7;color:var(--c-text-2);}

/* ============ 提示对照行 ============ */
.prompt-list{margin-top:20px;border:1px solid var(--c-border);border-radius:12px;overflow:hidden;background:var(--c-surface);}
.prompt-row{
  display:grid;grid-template-columns:1fr;gap:6px;
  padding:14px 16px;border-bottom:1px solid var(--c-border);
  transition:background var(--t);
}
.prompt-row:last-child{border-bottom:0;}
.prompt-row:hover{background:var(--c-surface-2);}
.prompt-key{font-size:14px;font-weight:600;color:var(--c-brand-strong);}
.prompt-val{font-size:14px;line-height:1.7;color:var(--c-text-2);}
@media (min-width:640px){
  .prompt-row{grid-template-columns:200px 1fr;align-items:baseline;gap:16px;}
}

/* ============ CTA 条 ============ */
.cta-bar{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  background:var(--c-brand-soft);border:1px solid #CFE1EE;border-radius:16px;
  padding:24px;margin-top:8px;
}
.cta-bar h2{font-size:22px;font-weight:700;line-height:1.35;}
.cta-bar p{margin-top:8px;font-size:14px;line-height:1.75;color:var(--c-text-2);max-width:620px;}
@media (max-width:640px){.cta-bar{padding:20px;}.cta-bar h2{font-size:19px;}}

/* ============ FAQ ============ */
.faq-list{margin-top:8px;}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:12px;
  margin-bottom:12px;overflow:hidden;transition:border-color var(--t),box-shadow var(--t);
}
.faq-item:hover{border-color:#CFE1EE;}
.faq-item.is-open{box-shadow:var(--sh-1);border-color:#CFE1EE;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--c-text);line-height:1.6;
}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 auto;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--c-brand);border-radius:2px;
  transition:transform var(--t),opacity var(--t);
}
.faq-icon::before{left:0;top:7px;width:16px;height:2px;}
.faq-icon::after{left:7px;top:0;width:2px;height:16px;}
.faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease;}
.faq-item.is-open .faq-a{max-height:360px;}
.faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--c-text-2);}
@media (max-width:640px){
  .faq-q{font-size:15px;padding:16px;}
  .faq-a-inner{padding:0 16px 16px;}
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--c-surface);border-top:1px solid var(--c-border);
  margin-top:64px;padding:48px 0 24px;
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
@media (min-width:640px){.footer-grid{grid-template-columns:1.4fr 1fr;}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--c-brand-strong);}
.footer-text{margin-top:14px;font-size:14px;line-height:1.8;color:var(--c-text-2);max-width:360px;}
.footer-title{font-size:14px;font-weight:600;color:var(--c-text);margin-bottom:14px;}
.footer-links{list-style:none;}
.footer-links li{margin-bottom:10px;}
.footer-links a{font-size:14px;color:var(--c-text-2);text-decoration:none;transition:color var(--t);}
.footer-links a:hover{color:var(--c-brand);text-decoration:underline;}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;
  margin-top:36px;padding-top:20px;border-top:1px solid var(--c-border);
  font-size:13px;color:var(--c-text-3);
}
.section[id]{scroll-margin-top:124px;}

/* roulang page: category2 */
:root{
  --c-bg:#F5F7F9;
  --c-surface:#FFFFFF;
  --c-surface-2:#EDF2F6;
  --c-border:#DFE7EE;
  --c-brand:#1C5D8C;
  --c-brand-strong:#123F61;
  --c-brand-soft:#E6F0F7;
  --c-accent:#D9822B;
  --c-accent-soft:#FBF0E2;
  --c-ok:#1F8A6D;
  --c-warn:#C0392B;
  --c-text:#16222C;
  --c-text-2:#55677A;
  --c-text-3:#8A99A8;
  --radius-card:14px;
  --radius-btn:10px;
  --shadow-1:0 1px 2px rgba(18,63,97,.06);
  --shadow-2:0 8px 24px -12px rgba(18,63,97,.18);
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body img{max-width:100%;display:block;height:auto}
body a{color:var(--c-brand);text-decoration:none;transition:color .18s ease}
body a:hover{text-decoration:underline}
body button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding-left:0;list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.num{font-variant-numeric:tabular-nums}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:#fff;
  border-bottom:1px solid transparent;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--c-border);box-shadow:var(--shadow-1)}
.header-top-inner{display:flex;align-items:center;gap:20px;height:72px}
.logo{display:inline-flex;align-items:center;gap:9px;color:var(--c-brand-strong);font-weight:700;font-size:18px;letter-spacing:-.01em;white-space:nowrap}
.logo:hover{text-decoration:none;color:var(--c-brand)}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:9px;background:var(--c-brand);color:#fff;flex:0 0 auto}
.search-box{
  display:flex;align-items:center;gap:8px;width:300px;height:40px;padding:0 14px;
  border:1px solid var(--c-border);border-radius:999px;background:var(--c-surface-2);color:var(--c-text-3);
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.search-box:focus-within{border-color:var(--c-brand);background:#fff;box-shadow:0 0 0 3px var(--c-brand-soft)}
.search-box input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px;color:var(--c-text)}
.search-box input::placeholder{color:var(--c-text-3)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:16px}
.link-quiet{font-size:14px;color:var(--c-text-2)}
.link-quiet:hover{color:var(--c-brand)}
.header-tabs{background:#fff;border-top:1px solid var(--c-border)}
.tabs-scroll{
  display:flex;align-items:center;gap:10px;height:48px;
  overflow-x:auto;scroll-snap-type:x proximity;
  scrollbar-width:none;-ms-overflow-style:none;
}
.tabs-scroll::-webkit-scrollbar{display:none}
.tab{
  flex:0 0 auto;scroll-snap-align:start;
  padding:7px 16px;border-radius:999px;border:1px solid var(--c-border);background:#fff;
  font-size:14px;color:var(--c-text-2);white-space:nowrap;
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.tab:hover{border-color:var(--c-brand);color:var(--c-brand);text-decoration:none}
.tab.is-active{background:var(--c-brand);border-color:var(--c-brand);color:#fff}
.tab.is-active:hover{color:#fff}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);font-weight:600;line-height:1;
  padding:0 18px;height:44px;font-size:15px;white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--c-brand);color:#fff}
.btn-primary:hover{background:var(--c-brand-strong);color:#fff;transform:translateY(-1px)}
.btn-primary:active{transform:none}
.btn-ghost{background:#fff;border:1px solid var(--c-border);color:var(--c-text)}
.btn-ghost:hover{border-color:var(--c-brand);color:var(--c-brand);background:var(--c-brand-soft)}
.btn-sm{height:36px;font-size:14px;padding:0 14px}
.btn-lg{height:48px;font-size:15px;padding:0 22px}
.btn:focus-visible,button:focus-visible,a:focus-visible{outline:2px solid var(--c-brand);outline-offset:2px}

/* ============ 首屏 ============ */
.page-hero{position:relative;overflow:hidden;background:#fff;border-bottom:1px solid var(--c-border)}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center right;opacity:.08;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(255,255,255,.9) 0%,rgba(245,247,249,.96) 100%);
}
.page-hero .container{position:relative;z-index:2;padding-top:44px;padding-bottom:40px}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--c-text-3);margin-bottom:20px}
.breadcrumb a{color:var(--c-text-2)}
.breadcrumb a:hover{color:var(--c-brand)}
.hero-label{
  display:inline-block;font-size:12px;letter-spacing:.08em;font-weight:700;
  color:var(--c-brand);background:var(--c-brand-soft);
  border-radius:999px;padding:5px 12px;margin-bottom:16px;
}
.page-hero h1{
  font-size:40px;font-weight:700;line-height:1.25;letter-spacing:-.01em;
  color:var(--c-brand-strong);max-width:820px;
}
.hero-sub{margin-top:16px;font-size:16px;color:var(--c-text-2);max-width:700px}
.anchor-pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.anchor-pill{
  padding:7px 15px;border-radius:999px;background:#fff;border:1px solid var(--c-border);
  font-size:13px;color:var(--c-text-2);transition:all .18s ease;
}
.anchor-pill:hover{border-color:var(--c-brand);color:var(--c-brand);background:var(--c-brand-soft);text-decoration:none}

/* ============ 主体两栏 ============ */
.layout{
  display:grid;grid-template-columns:240px minmax(0,1fr);gap:48px;
  padding-top:56px;padding-bottom:8px;
}
.side-toc{position:sticky;top:140px;align-self:start}
.toc-title{font-size:12px;letter-spacing:.08em;font-weight:700;color:var(--c-text-3);margin-bottom:14px}
.toc-list{display:grid;gap:6px}
.toc-link{
  display:block;padding:8px 12px;border-radius:9px;font-size:14px;color:var(--c-text-2);
  border-left:2px solid transparent;transition:all .18s ease;
}
.toc-link:hover{background:#fff;color:var(--c-brand);text-decoration:none}
.toc-link.is-active{background:#fff;border-left-color:var(--c-brand);color:var(--c-brand);font-weight:600;box-shadow:var(--shadow-1)}
.content-col{max-width:760px;min-width:0}

.sec{padding-bottom:40px;margin-bottom:40px;border-bottom:1px dashed var(--c-border);scroll-margin-top:140px}
.sec:last-of-type{border-bottom:0;margin-bottom:0}
.sec-num{font-size:12px;letter-spacing:.16em;font-weight:700;color:var(--c-accent);margin-bottom:8px}
.sec h2{font-size:26px;font-weight:700;line-height:1.35;color:var(--c-brand-strong);letter-spacing:-.01em}
.sec p{margin-top:14px;color:var(--c-text-2)}
.sec p strong{color:var(--c-text);font-weight:600}
.dot-list{margin-top:16px;display:grid;gap:12px}
.dot-list li{position:relative;padding-left:20px;font-size:15px;color:var(--c-text-2);line-height:1.8}
.dot-list li::before{content:"";position:absolute;left:2px;top:11px;width:7px;height:7px;border-radius:50%;background:var(--c-brand)}
.dot-list li b{color:var(--c-text);font-weight:600}
.sec-figure{margin-top:22px;border-radius:12px;overflow:hidden;background:var(--c-surface-2);border:1px solid var(--c-border)}
.sec-figure img{width:100%;aspect-ratio:16/10;object-fit:cover}
.sec-figure figcaption{font-size:13px;color:var(--c-text-3);text-align:center;padding:10px 14px;background:#fff}
.step-list{margin-top:16px;display:grid;gap:10px;counter-reset:step}
.step-list li{
  counter-increment:step;position:relative;padding:12px 16px 12px 46px;
  background:#fff;border:1px solid var(--c-border);border-radius:12px;font-size:15px;color:var(--c-text-2);
}
.step-list li::before{
  content:counter(step);position:absolute;left:14px;top:13px;
  width:22px;height:22px;border-radius:7px;background:var(--c-brand-soft);color:var(--c-brand);
  font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;
}

/* ============ 对比条组 ============ */
.cmp-card{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--radius-card);
  padding:26px 24px;box-shadow:var(--shadow-1);margin-top:24px;
}
.cmp-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:8px}
.cmp-head h3{font-size:17px;font-weight:700;color:var(--c-text)}
.cmp-head span{font-size:13px;color:var(--c-text-3)}
.cmp-group{padding-top:18px;margin-top:18px;border-top:1px solid var(--c-border)}
.cmp-group:first-of-type{border-top:0;margin-top:6px}
.cmp-group-title{font-size:13px;color:var(--c-text-3);margin-bottom:10px}
.cmp-row{display:grid;grid-template-columns:150px minmax(0,1fr) 76px;gap:14px;align-items:center;min-height:44px}
.cmp-name{font-size:14px;color:var(--c-text-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cmp-bar{height:10px;border-radius:999px;background:var(--c-surface-2);overflow:hidden}
.cmp-bar span{display:block;height:100%;border-radius:999px;background:var(--c-brand)}
.cmp-bar span.is-ok{background:var(--c-ok)}
.cmp-bar span.is-muted{background:#A9BAC8}
.cmp-val{text-align:right;font-size:14px;font-weight:600;color:var(--c-text);font-variant-numeric:tabular-nums}

/* ============ 深色排查顺序面板 ============ */
.hud-band{padding:20px 0 72px}
.hud{position:relative;overflow:hidden;background:#102A3E;border-radius:18px;padding:40px;color:#C6D6E3}
.hud::before{
  content:"";position:absolute;inset:0;opacity:.05;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:32px 32px;
}
.hud > *{position:relative;z-index:2}
.hud-label{font-size:12px;letter-spacing:.16em;font-weight:700;color:#7FB3D5}
.hud h2{font-size:26px;font-weight:700;color:#fff;margin-top:10px;line-height:1.35}
.hud-desc{margin-top:12px;font-size:15px;color:#A9BECF;max-width:640px}
.hud-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-top:30px}
.hud-step{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:12px;padding:20px}
.hud-step .n{font-size:12px;letter-spacing:.16em;font-weight:700;color:#D9822B}
.hud-step h3{font-size:16px;font-weight:600;color:#fff;margin:10px 0 8px}
.hud-step p{font-size:13px;line-height:1.7;color:#A9BECF}

/* ============ FAQ ============ */
.faq-section{padding-bottom:72px}
.section-head{max-width:720px;margin-bottom:26px}
.section-head .sec-num{margin-bottom:10px}
.section-head h2{font-size:28px;font-weight:700;color:var(--c-brand-strong);letter-spacing:-.01em}
.section-head p{margin-top:12px;font-size:15px;color:var(--c-text-2)}
.faq-list{display:grid;gap:12px;max-width:820px}
.faq-item{
  background:#fff;border:1px solid var(--c-border);border-radius:12px;
  box-shadow:var(--shadow-1);overflow:hidden;transition:box-shadow .18s ease,border-color .18s ease;
}
.faq-item:hover{box-shadow:var(--shadow-2)}
.faq-item.is-open{border-color:#C7DCEB}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;
  padding:18px 22px;text-align:left;font-size:16px;font-weight:600;color:var(--c-text);
  transition:color .18s ease;
}
.faq-q:hover{color:var(--c-brand)}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 auto}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-brand);border-radius:2px;
  transform:translate(-50%,-50%);transition:transform .2s ease,opacity .2s ease;
}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a-inner{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--c-text-2)}
.faq-item.is-open .faq-a{max-height:320px}

/* ============ CTA ============ */
.cta-band{
  background:var(--c-brand-soft);border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border);
  padding:48px 0;
}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px}
.cta-inner h2{font-size:24px;font-weight:700;color:var(--c-brand-strong);line-height:1.35}
.cta-inner p{margin-top:10px;font-size:15px;color:var(--c-text-2);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 页脚 ============ */
.site-footer{background:#fff;border-top:1px solid var(--c-border);padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:17px;color:var(--c-brand-strong);margin-bottom:14px}
.footer-text{font-size:14px;line-height:1.8;color:var(--c-text-2);max-width:340px}
.footer-title{font-size:14px;font-weight:700;color:var(--c-text);margin-bottom:14px}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:14px;color:var(--c-text-2)}
.footer-links a:hover{color:var(--c-brand)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  margin-top:44px;padding:20px 0;border-top:1px solid var(--c-border);
  font-size:13px;color:var(--c-text-3);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{padding:0 24px}
}
@media (max-width:1023px){
  .container{padding:0 20px}
  .header-top-inner{height:64px;gap:14px}
  .search-box{width:220px}
  .header-actions .link-quiet{display:none}
  .page-hero h1{font-size:32px}
  .layout{grid-template-columns:1fr;gap:26px;padding-top:34px}
  .side-toc{position:static;top:auto}
  .toc-title{display:none}
  .toc-list{display:flex;gap:10px;overflow-x:auto;padding-bottom:4px;scrollbar-width:none}
  .toc-list::-webkit-scrollbar{display:none}
  .toc-link{
    flex:0 0 auto;white-space:nowrap;border-left:0;border:1px solid var(--c-border);
    border-radius:999px;padding:7px 14px;background:#fff;font-size:13px;
  }
  .toc-link.is-active{border-color:var(--c-brand);background:var(--c-brand-soft);box-shadow:none}
  .content-col{max-width:none}
  .sec{scroll-margin-top:130px}
  .hud-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .hud{padding:30px 24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
}
@media (max-width:767px){
  .page-hero .container{padding-top:30px;padding-bottom:30px}
  .page-hero h1{font-size:28px}
  .hero-sub{font-size:15px}
  .sec h2{font-size:22px}
  .section-head h2{font-size:22px}
  .cmp-row{grid-template-columns:1fr 64px;gap:6px 12px;padding:6px 0;min-height:auto}
  .cmp-name{grid-column:1 / -1;white-space:normal}
  .cmp-bar{grid-column:1;height:9px}
  .cmp-val{grid-column:2;text-align:right}
  .hud-grid{grid-template-columns:1fr}
  .cta-inner h2{font-size:21px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
}
@media (max-width:639px){
  .container{padding:0 16px}
  .logo-text{font-size:16px}
  .header-top-inner{flex-wrap:nowrap}
  .search-box{display:none}
  .header-actions{margin-left:auto;gap:10px}
  .page-hero h1{font-size:26px}
  .faq-q{padding:16px;font-size:15px}
  .faq-a-inner{padding:0 16px 18px}
  .hud{padding:26px 20px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}