/* roulang page: index */
:root{
  --brand-600:#2A5B9E;
  --brand-700:#1F4A85;
  --brand-50:#EEF4FB;
  --brand-200:#C7D9EE;
  --accent-500:#E8A33D;
  --ink-900:#16202B;
  --ink-600:#4A5A6B;
  --ink-400:#8A97A6;
  --ink-300:#C6CED8;
  --line:#E3E9F0;
  --bg:#F7F9FC;
  --surface:#FFFFFF;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-sm:0 1px 2px rgba(22,32,43,.06);
  --shadow-md:0 8px 24px -12px rgba(22,32,43,.14);
  --shadow-lg:0 14px 34px -14px rgba(22,32,43,.20);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sidebar-w:240px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink-600);
  background:var(--surface);
  -webkit-font-smoothing:antialiased;
}
body.offcanvas-open{overflow:hidden}
h1,h2,h3,h4,h5{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:0}
h1{font-size:clamp(30px,4vw,44px);line-height:1.25}
h2{font-size:28px;line-height:1.35}
h3{font-size:20px;font-weight:600;line-height:1.5}
h4{font-size:16px;font-weight:600}
p{margin:0 0 1em;max-width:72ch}
p:last-child{margin-bottom:0}
a{color:var(--brand-600);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px;transition:color .18s var(--ease)}
a:hover{color:var(--brand-700)}
img{max-width:100%;display:block}
ul,ol{margin:0;padding:0;list-style:none}
button,input,textarea,select{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid rgba(42,91,158,.55);outline-offset:2px;border-radius:6px}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--alt{background:var(--bg)}
.section--tight{padding-top:72px}
@media(max-width:1199px){.section{padding:72px 0}}
@media(max-width:767px){.section{padding:56px 0}.container-x{padding:0 18px}}

/* ============ 侧边导航 ============ */
.site-sidebar{display:none}
.topbar{
  position:sticky;top:0;z-index:1030;
  height:60px;background:#fff;border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:12px;padding:0 16px;
}
.topbar .brand-mini{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink-900)}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:10px;
  background:var(--brand-600);color:#fff;font-weight:700;font-size:15px;
  display:flex;align-items:center;justify-content:center;letter-spacing:.02em;
}
.topbar .brand-mini strong{font-size:16px;font-weight:700;line-height:1.2}
.burger{
  margin-left:auto;width:44px;height:44px;border:1px solid var(--line);
  background:#fff;border-radius:10px;display:flex;align-items:center;justify-content:center;
  flex-direction:column;gap:4px;cursor:pointer;
}
.burger span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px}

@media(min-width:992px){
  .topbar{display:none}
  .site-sidebar{
    display:flex;flex-direction:column;
    position:fixed;top:0;left:0;bottom:0;
    width:var(--sidebar-w);
    background:#fff;border-right:1px solid var(--line);
    z-index:1030;padding:0 16px 20px;
  }
  .site-main{margin-left:var(--sidebar-w)}
}
@media(min-width:992px) and (max-width:1199px){
  :root{--sidebar-w:200px}
  .site-sidebar{padding:0 12px 18px}
  .side-nav .nav-item{font-size:14px;padding-left:12px}
}
.brand-block{padding:22px 8px 18px;border-bottom:1px solid var(--line);margin-bottom:10px}
.brand-link{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink-900)}
.brand-copy{display:flex;flex-direction:column;line-height:1.25}
.brand-copy strong{font-size:16px;font-weight:700;color:var(--ink-900)}
.brand-copy em{font-style:normal;font-size:12px;color:var(--ink-400);margin-top:2px}
.side-nav{flex:1 1 auto;overflow-y:auto;display:flex;flex-direction:column;gap:2px;padding-bottom:12px}
.nav-group-label{
  font-size:11px;letter-spacing:.08em;color:var(--ink-400);
  padding:14px 14px 6px;text-transform:uppercase;
}
.nav-item{
  display:flex;align-items:center;height:44px;border-radius:10px;
  padding:0 14px;font-size:15px;color:var(--ink-600);
  text-decoration:none;position:relative;transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-item:hover{background:#F5F8FC;color:var(--ink-900);text-decoration:none}
.nav-item.is-active{background:var(--brand-50);color:var(--brand-700);font-weight:600}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand-600);
}
.nav-divider{height:1px;background:var(--line);margin:12px 14px}
.side-cta{border-top:1px solid var(--line);padding-top:16px;display:flex;flex-direction:column;gap:10px}
.side-cta p{font-size:12px;color:var(--ink-400);margin:0}
.side-cta .phone{font-size:14px;font-weight:600;color:var(--ink-900);font-variant-numeric:tabular-nums}

/* ============ 按钮 ============ */
.btn-main,.btn-ghost,.btn-soft{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;text-decoration:none;cursor:pointer;
  border:1px solid transparent;transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn-main{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-sm)}
.btn-main:hover{background:var(--brand-700);color:#fff;text-decoration:none;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-ghost{background:#fff;color:var(--ink-900);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand-200);color:var(--brand-700);text-decoration:none;background:#FBFCFE}
.btn-soft{background:var(--brand-50);color:var(--brand-700)}
.btn-soft:hover{background:#E2ECF8;color:var(--brand-700);text-decoration:none}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-block{width:100%}

/* ============ 通用标题组 ============ */
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.08em;
  color:var(--brand-600);font-weight:600;margin-bottom:14px;
}
.section-head{max-width:760px;margin-bottom:48px}
.section-head p{font-size:16px;color:var(--ink-600);margin-top:12px}
.rule{
  height:1px;background:var(--line);position:relative;margin:0 0 40px;
}
.rule::after{
  content:"";position:absolute;left:0;top:-1px;width:64px;height:3px;
  border-radius:3px;background:var(--brand-600);
}
@media(max-width:767px){.section-head{margin-bottom:32px}}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,var(--bg) 0%,#FFFFFF 88%);
  padding:84px 0 72px;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(180deg,rgba(42,91,158,.08) 0 1px,transparent 1px 34px);
  opacity:.55;
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{margin-bottom:18px}
.hero .lede{font-size:17px;color:var(--ink-600);max-width:56ch;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:36px}
.trust-row{display:flex;flex-wrap:wrap;gap:12px 32px;font-size:13px;color:var(--ink-400)}
.trust-row span{display:flex;align-items:center;gap:8px;font-variant-numeric:tabular-nums}
.trust-row span::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--accent-500);flex:0 0 6px;
}
.hero-media{
  position:relative;border-radius:var(--radius-img);overflow:hidden;
  border:1px solid rgba(22,32,43,.06);box-shadow:var(--shadow-md);
  aspect-ratio:4/3;background:#EEF2F7;
}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media .cap{
  position:absolute;left:0;right:0;bottom:0;
  background:linear-gradient(180deg,rgba(22,32,43,0) 0%,rgba(22,32,43,.72) 100%);
  color:#fff;font-size:13px;padding:34px 18px 14px;
}
@media(max-width:991px){
  .hero{padding:48px 0 56px}
  .hero-inner{grid-template-columns:1fr;gap:32px}
  .hero-actions{margin-bottom:26px}
}

/* ============ 卖点 2+1 ============ */
.sell-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);padding:28px;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--brand-200)}
.card h3{margin-bottom:10px}
.card p{font-size:15px;margin-bottom:16px}
.card-figure{border-radius:var(--radius-img);overflow:hidden;aspect-ratio:16/9;background:#EEF2F7;margin-top:18px}
.card-figure img{width:100%;height:100%;object-fit:cover}
.sell-side{display:grid;grid-template-rows:1fr 1fr;gap:24px}
.sell-side .card{display:flex;flex-direction:column}
.sell-side .card p{margin-bottom:0}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:var(--brand-50);color:var(--brand-700);font-size:12px;font-weight:600;margin-bottom:12px;
}
.tag.neutral{background:#F2F5F9;color:var(--ink-600)}
@media(max-width:991px){
  .sell-grid{grid-template-columns:1fr}
  .sell-side{grid-template-rows:none;grid-template-columns:1fr}
}
@media(max-width:575px){.sell-side{grid-template-columns:1fr}}

/* ============ 演示 / 流程 ============ */
.demo-block{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  padding:44px 0;border-top:1px solid var(--line);
}
.demo-block:first-of-type{border-top:none;padding-top:8px}
.demo-block.reverse .demo-media{order:-1}
.demo-media{border-radius:var(--radius-img);overflow:hidden;aspect-ratio:16/10;background:#EEF2F7;border:1px solid rgba(22,32,43,.06)}
.demo-media img{width:100%;height:100%;object-fit:cover}
.tick{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.tick .dot{
  width:30px;height:30px;flex:0 0 30px;border-radius:50%;
  border:1.5px solid var(--brand-600);background:#fff;color:var(--brand-700);
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;
  font-variant-numeric:tabular-nums;
}
.tick .bar{flex:1 1 auto;height:1px;background:repeating-linear-gradient(90deg,var(--line) 0 8px,transparent 8px 14px)}
.demo-block ul.check{display:flex;flex-direction:column;gap:10px;margin-top:16px}
.demo-block ul.check li{display:flex;gap:10px;font-size:15px;color:var(--ink-600)}
.demo-block ul.check li svg{flex:0 0 18px;margin-top:5px}
@media(max-width:991px){
  .demo-block{grid-template-columns:1fr;gap:24px;padding:32px 0}
  .demo-block.reverse .demo-media{order:0}
}

/* ============ 证据 行式列表 ============ */
.proof-list{border-top:1px solid var(--line)}
.proof-row{
  display:grid;grid-template-columns:220px 1fr;gap:32px;align-items:baseline;
  padding:26px 0;border-bottom:1px solid var(--line);
  transition:background .18s var(--ease);
}
.proof-row:hover{background:#FBFCFE}
.proof-num{font-size:30px;font-weight:700;color:var(--ink-900);font-variant-numeric:tabular-nums;line-height:1.2}
.proof-num .unit{font-size:14px;color:var(--accent-500);font-weight:600;margin-left:4px}
.proof-desc{font-size:15px;color:var(--ink-600);max-width:62ch}
.proof-foot{margin-top:20px;font-size:13px;color:var(--ink-400)}
@media(max-width:767px){
  .proof-row{grid-template-columns:1fr;gap:8px;padding:20px 0}
  .proof-num{font-size:24px}
}

/* ============ 价格 ============ */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.price-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:30px 26px;display:flex;flex-direction:column;box-shadow:var(--shadow-sm);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.price-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.price-card.featured{border-color:var(--brand-200);box-shadow:var(--shadow-md);position:relative}
.price-card.featured .rec{
  position:absolute;top:-12px;left:26px;height:24px;padding:0 12px;border-radius:999px;
  background:var(--accent-500);color:#fff;font-size:12px;font-weight:600;
  display:inline-flex;align-items:center;
}
.price-name{font-size:18px;font-weight:600;color:var(--ink-900);margin-bottom:6px}
.price-note{font-size:13px;color:var(--ink-400);margin-bottom:18px}
.price-value{font-size:36px;font-weight:700;color:var(--ink-900);line-height:1.1;font-variant-numeric:tabular-nums;margin-bottom:4px}
.price-value .unit{font-size:14px;color:var(--ink-400);font-weight:500;margin-left:6px}
.price-desc{font-size:14px;color:var(--ink-600);margin:14px 0 20px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.price-feats{display:flex;flex-direction:column;gap:11px;margin-bottom:26px;flex:1 1 auto}
.price-feats li{display:flex;gap:10px;font-size:14px;color:var(--ink-600)}
.price-feats li svg{flex:0 0 16px;margin-top:4px}
.price-wide{
  grid-column:1 / -1;background:var(--brand-50);border:1px solid var(--brand-200);
  border-radius:var(--radius-card);padding:28px;display:grid;
  grid-template-columns:1fr auto;gap:24px;align-items:center;
}
.price-wide h3{margin-bottom:8px}
.price-wide p{font-size:14px;margin:0;max-width:70ch}
@media(max-width:991px){
  .price-grid{grid-template-columns:1fr}
  .price-wide{grid-template-columns:1fr;gap:18px}
}

/* ============ 资讯 ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;display:flex;flex-direction:column;height:100%;
  box-shadow:var(--shadow-sm);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--brand-200)}
.news-cover{display:block;aspect-ratio:16/10;background:#EEF2F7;overflow:hidden}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .22s var(--ease)}
.news-card:hover .news-cover img{transform:scale(1.03)}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1 1 auto}
.news-body h3{font-size:18px;line-height:1.5;margin:10px 0 8px}
.news-body h3 a{color:var(--ink-900);text-decoration:none}
.news-card:hover .news-body h3 a{color:var(--brand-700)}
.news-body p{font-size:14px;color:var(--ink-600);margin-bottom:16px}
.news-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--ink-400);padding-top:14px;border-top:1px solid var(--line);
  font-variant-numeric:tabular-nums;
}
@media(max-width:991px){.news-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:575px){.news-grid{grid-template-columns:1fr}}
.empty-state{
  background:var(--brand-50);border-radius:var(--radius-card);padding:48px 24px;text-align:center;
  border:1px solid var(--brand-200);
}
.empty-state strong{display:block;font-size:17px;color:var(--ink-900);margin-bottom:8px}
.empty-state p{font-size:14px;color:var(--ink-600);margin:0 auto 18px;max-width:48ch}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:920px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:background .18s var(--ease),border-color .18s var(--ease)}
.faq-item:hover{background:#F5F8FC}
.faq-item.is-open{border-color:var(--brand-200);background:#fff;position:relative}
.faq-item.is-open::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand-600)}
.faq-q{
  width:100%;background:none;border:none;text-align:left;cursor:pointer;
  display:flex;align-items:center;gap:16px;padding:20px 22px;
  font-size:16px;font-weight:600;color:var(--ink-900);min-height:44px;
}
.faq-q .chev{margin-left:auto;flex:0 0 18px;transition:transform .2s var(--ease);color:var(--brand-600)}
.faq-item.is-open .chev{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s var(--ease)}
.faq-a .inner{padding:0 22px 22px;font-size:15px;line-height:1.8;color:var(--ink-600)}

/* ============ 表单 / 联系 ============ */
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact-info li{display:flex;gap:12px;padding:16px 0;border-bottom:1px solid var(--line);font-size:15px}
.contact-info li:last-child{border-bottom:none}
.contact-info .k{color:var(--ink-400);font-size:13px;min-width:78px;flex:0 0 78px}
.contact-info .v{color:var(--ink-900);font-weight:500}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:30px;box-shadow:var(--shadow-sm)}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink-900);margin-bottom:8px}
.field label .req{color:#D64545;margin-left:2px}
.field input,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:#fff;color:var(--ink-900);padding:12px 14px;font-size:15px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field input{height:46px;padding:0 14px}
.field textarea{min-height:110px;resize:vertical;line-height:1.7}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(42,91,158,.16);
}
.field.has-error input,.field.has-error textarea{border-color:#D64545}
.err-msg{display:none;font-size:13px;color:#D64545;margin-top:6px}
.field.has-error .err-msg{display:block}
.form-tip{
  display:none;margin-top:16px;padding:12px 16px;border-radius:var(--radius-btn);
  background:var(--brand-50);color:var(--brand-700);font-size:14px;border:1px solid var(--brand-200);
}
.form-tip.show{display:block}
@media(max-width:991px){.contact-wrap{grid-template-columns:1fr;gap:32px}}

/* ============ CTA 带 ============ */
.cta-band{
  background:var(--ink-900);color:#fff;border-radius:var(--radius-card);
  padding:44px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{color:#fff;font-size:24px;margin-bottom:8px}
.cta-band p{color:var(--ink-300);font-size:15px;margin:0;max-width:56ch}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);color:#fff;padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-grid h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:16px}
.footer-grid p{color:#9AA7B4;font-size:14px;max-width:34ch}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{color:#B9C4CF;font-size:14px;text-decoration:none;transition:color .18s var(--ease)}
.footer-links a:hover{color:#fff}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0;font-size:13px;color:#8A97A6;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
}
@media(max-width:991px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media(max-width:575px){.footer-grid{grid-template-columns:1fr}}

/* ============ 浮动 CTA ============ */
.float-pill{
  position:fixed;right:24px;bottom:28px;z-index:1040;
  display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 20px;
  border-radius:999px;background:var(--brand-600);color:#fff;font-size:15px;font-weight:600;
  text-decoration:none;box-shadow:var(--shadow-lg);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .2s var(--ease),transform .2s var(--ease),background .18s var(--ease);
}
.float-pill.show{opacity:1;transform:translateY(0);pointer-events:auto}
.float-pill:hover{background:var(--brand-700);color:#fff;text-decoration:none}
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:1040;height:56px;
  background:#fff;border-top:1px solid var(--line);
  display:flex;align-items:center;gap:12px;padding:0 16px;
  transform:translateY(100%);transition:transform .2s var(--ease);
}
.mobile-bar.show{transform:translateY(0)}
.mobile-bar .btn-main{flex:1 1 auto;height:42px}
.mobile-bar .tel{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:10px;background:var(--brand-50);color:var(--brand-700);
}
@media(max-width:991px){
  body.has-mobile-bar{padding-bottom:80px}
  .float-pill{display:none}
}
@media(min-width:992px){.mobile-bar{display:none}}

/* ============ Offcanvas 自定义 ============ */
.offcanvas.mk-drawer{width:min(82vw,320px);border-right:1px solid var(--line)}
.mk-drawer .offcanvas-header{border-bottom:1px solid var(--line);padding:16px 18px}
.mk-drawer .offcanvas-body{padding:14px 14px 24px;display:flex;flex-direction:column}
.mk-drawer .nav-item{color:var(--ink-600)}
.mk-drawer .drawer-foot{margin-top:auto;padding-top:18px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px}

/* ============ 进入视口动画 ============ */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .2s var(--ease),transform .2s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ============ Bootstrap 覆盖 ============ */
.btn:focus,.btn:active{box-shadow:none}
.accordion-button{background:transparent;color:var(--ink-900);box-shadow:none}
.accordion-button::after{display:none}
[class*="col-"]{min-width:0}

/* roulang page: article */
:root{
  --brand-600:#2A5B9E;
  --brand-700:#1F4A85;
  --brand-50:#EEF4FB;
  --brand-200:#C7D9EE;
  --accent-500:#E8A33D;
  --ink-900:#16202B;
  --ink-600:#4A5A6B;
  --ink-400:#8A97A6;
  --ink-300:#C3CCD6;
  --line:#E3E9F0;
  --bg:#F7F9FC;
  --surface:#FFFFFF;
  --danger:#D64545;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-sm:0 1px 2px rgba(22,32,43,.06);
  --shadow-md:0 8px 24px -12px rgba(22,32,43,.14);
  --shadow-lg:0 14px 34px -14px rgba(22,32,43,.20);
  --ease:cubic-bezier(.2,.7,.3,1);
  --side-w:240px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink-600);
  background:var(--surface);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto}
a{color:var(--brand-600);text-decoration:underline;text-decoration-offset:4px;text-underline-offset:4px}
a:hover{color:var(--brand-700)}
button{font-family:inherit}
:focus-visible{outline:2px solid rgba(42,91,158,.55);outline-offset:2px}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;background:var(--brand-600);color:#fff;
  padding:10px 18px;border-radius:0 0 var(--radius-btn) 0;text-decoration:none;
}
.skip-link:focus{left:0;color:#fff}
.container-x{max-width:1200px;margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums}
section[id]{scroll-margin-top:80px}

/* ============ 按钮 ============ */
.btn{font-size:15px;line-height:1.2;border-radius:var(--radius-btn);padding:.7rem 1.2rem;font-weight:600;
  transition:transform .18s var(--ease),background-color .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);}
.btn.btn-primary{background:var(--brand-600);border:1px solid var(--brand-600);color:#fff;box-shadow:var(--shadow-sm)}
.btn.btn-primary:hover,.btn.btn-primary:focus{background:var(--brand-700);border-color:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn.btn-outline-brand{background:#fff;border:1px solid var(--brand-200);color:var(--brand-600)}
.btn.btn-outline-brand:hover{border-color:var(--brand-600);background:var(--brand-50);color:var(--brand-700);transform:translateY(-1px)}
.btn.btn-ghost{background:#F2F5F9;border:1px solid transparent;color:var(--ink-900)}
.btn.btn-ghost:hover{background:#E9EFF6;color:var(--brand-700)}
.btn-block{display:block;width:100%;text-align:center}

/* ============ 左侧竖向导航 ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--side-w);z-index:40;
  background:#fff;border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:0 14px 18px;overflow-y:auto;
}
.brand{display:flex;align-items:center;gap:10px;height:88px;padding:0 8px;text-decoration:none;color:var(--ink-900);flex:0 0 auto}
.brand:hover{color:var(--ink-900);text-decoration:none}
.brand-mark{width:36px;height:36px;border-radius:10px;background:var(--brand-600);color:#fff;display:grid;place-items:center;
  font-weight:700;font-size:13px;letter-spacing:.04em;flex:0 0 auto}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:15px;font-weight:700;letter-spacing:0}
.brand-text small{font-size:11px;color:var(--ink-400);letter-spacing:.04em}
.side-nav{display:flex;flex-direction:column;gap:4px;flex:1 1 auto;padding-top:6px}
.nav-group-label{font-size:12px;color:var(--ink-400);letter-spacing:.08em;padding:10px 14px 4px}
.nav-item{
  display:flex;align-items:center;height:44px;padding:0 14px;border-radius:10px;
  font-size:14px;color:var(--ink-600);text-decoration:none;border-left:3px solid transparent;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.nav-item:hover{background:#F5F8FC;color:var(--ink-900);text-decoration:none}
.nav-item.is-active{background:var(--brand-50);color:var(--brand-700);font-weight:600;border-left-color:var(--brand-600)}
.nav-divider{height:1px;background:var(--line);margin:12px 8px}
.sidebar-foot{margin-top:16px;flex:0 0 auto}
.sidebar-foot .btn{margin-bottom:12px}
.side-contact{margin:0;font-size:13px;line-height:1.7;color:var(--ink-400)}

/* ============ 移动端顶栏 ============ */
.topbar{
  display:none;position:sticky;top:0;z-index:50;height:60px;background:#fff;border-bottom:1px solid var(--line);
  align-items:center;gap:12px;padding:0 16px;
}
.topbar .brand{height:60px;padding:0;flex:1 1 auto}
.hamburger{
  width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:10px;
  display:grid;place-items:center;gap:0;padding:0;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;margin:2px 0}
.mobile-drawer{width:min(82vw,320px)}
.offcanvas-header{border-bottom:1px solid var(--line);padding:14px 18px}
.offcanvas-title{font-size:16px;font-weight:700;color:var(--ink-900)}
.offcanvas-body{padding:14px 14px 24px}
.drawer-contact{margin-top:16px;font-size:13px;color:var(--ink-400);line-height:1.8}

/* ============ 主内容区 ============ */
.app-main{margin-left:var(--side-w);padding:0 24px 80px}
.main-inner{max-width:1200px;margin:0 auto}

/* ============ 文章页头 ============ */
.post-hero{
  position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#F4F8FD 0%,#FFFFFF 100%);
  padding:26px 0 34px;margin:0 -24px 34px;
}
.post-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.06;
  background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.post-hero>.hero-inner{position:relative;z-index:1;max-width:1200px;margin:0 auto;padding:0 24px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-400);margin-bottom:18px}
.crumb a{color:var(--ink-400);text-decoration:none}
.crumb a:hover{color:var(--brand-600);text-decoration:underline}
.crumb .sep{color:var(--ink-300)}
.crumb .current{color:var(--ink-900);font-weight:600}
.post-badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:var(--brand-50);color:var(--brand-600);font-size:12px;font-weight:600;letter-spacing:.02em;
}
.post-hero h1{
  font-size:clamp(24px,3vw,32px);line-height:1.35;font-weight:700;color:var(--ink-900);
  margin:14px 0 0;max-width:900px;letter-spacing:0;
}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:16px;font-size:13px;color:var(--ink-400)}
.post-meta .bar{width:1px;height:12px;background:var(--line)}

/* ============ 正文 ============ */
.article-wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:24px}
.cover-figure{margin:0 0 32px;border-radius:var(--radius-img);overflow:hidden;background:#EEF2F7;border:1px solid rgba(22,32,43,.06)}
.cover-figure img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover}
.article-body{max-width:760px;font-size:16px;line-height:1.85;color:var(--ink-600);word-break:break-word;overflow-wrap:anywhere}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1.3em}
.article-body h2{font-size:22px;line-height:1.45;font-weight:700;color:var(--ink-900);margin:2em 0 .8em;padding-left:12px;border-left:3px solid var(--brand-600)}
.article-body h3{font-size:18px;line-height:1.5;font-weight:600;color:var(--ink-900);margin:1.5em 0 .6em}
.article-body h4{font-size:16px;font-weight:600;color:var(--ink-900);margin:1.3em 0 .5em}
.article-body ul,.article-body ol{padding-left:1.4em;margin:0 0 1.3em}
.article-body li{margin:.4em 0}
.article-body strong{color:var(--ink-900)}
.article-body a{color:var(--brand-600);text-decoration:underline;text-underline-offset:4px}
.article-body blockquote{
  margin:1.4em 0;padding:14px 18px;background:var(--brand-50);
  border-left:3px solid var(--brand-600);border-radius:0 10px 10px 0;color:var(--ink-600);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius-img);display:block;margin:1.6em auto;max-width:100%}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;color:var(--ink-400);text-align:center;margin-top:8px}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;font-variant-numeric:tabular-nums}
.article-body th{background:var(--brand-50);color:var(--ink-900);text-align:left;font-weight:600}
.article-body th,.article-body td{padding:10px 12px;border-bottom:1px solid var(--line)}
.article-body tbody tr:nth-child(even){background:#FAFCFE}
.article-body pre{background:#F4F7FB;border:1px solid var(--line);border-radius:var(--radius-img);padding:14px 16px;overflow:auto}
.article-body code{font-size:14px}

.empty-state{
  max-width:760px;background:var(--brand-50);border:1px solid var(--brand-200);border-radius:var(--radius-card);
  padding:36px 28px;text-align:center;
}
.empty-state h2{font-size:20px;font-weight:700;color:var(--ink-900);margin:0 0 10px}
.empty-state p{margin:0 0 20px;color:var(--ink-600);font-size:15px}

.post-actions{
  display:flex;flex-wrap:wrap;gap:12px;margin:40px 0 0;padding-top:24px;border-top:1px solid var(--line);max-width:760px;
}

/* ============ 相关推荐 ============ */
.block{margin-top:64px}
.block-head{margin-bottom:22px}
.eyebrow{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--brand-600);margin-bottom:8px}
.block-head h2{font-size:24px;line-height:1.35;font-weight:700;color:var(--ink-900);margin:0 0 8px}
.block-head p{margin:0;font-size:15px;color:var(--ink-600);max-width:72ch}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.rel-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;text-decoration:none;color:inherit;box-shadow:var(--shadow-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--brand-200);color:inherit;text-decoration:none}
.rel-thumb{aspect-ratio:16/10;background:#EEF2F7;overflow:hidden}
.rel-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.rel-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1 1 auto}
.rel-cat{align-self:flex-start;font-size:12px;height:24px;display:inline-flex;align-items:center;padding:0 10px;border-radius:999px;background:var(--brand-50);color:var(--brand-600);font-weight:600}
.rel-body h3{font-size:17px;line-height:1.5;font-weight:600;color:var(--ink-900);margin:0}
.rel-card:hover h3{color:var(--brand-600)}
.rel-body p{margin:0;font-size:14px;color:var(--ink-600);line-height:1.7}
.rel-more{margin-top:auto;font-size:13px;color:var(--brand-600);font-weight:600}

/* ============ FAQ ============ */
.faq-list{max-width:860px;display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border-radius:12px;box-shadow:var(--shadow-sm);overflow:hidden;border-left:3px solid transparent;transition:border-color .18s var(--ease)}
.faq-item.is-open{border-left-color:var(--brand-600)}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:transparent;border:0;padding:16px 20px;text-align:left;font-size:16px;font-weight:600;color:var(--ink-900);
  cursor:pointer;transition:background-color .18s var(--ease);
}
.faq-q:hover{background:#F5F8FC}
.faq-ico{width:16px;height:16px;flex:0 0 auto;position:relative}
.faq-ico::before,.faq-ico::after{content:"";position:absolute;background:var(--brand-600);border-radius:2px}
.faq-ico::before{left:0;top:7px;width:16px;height:2px}
.faq-ico::after{left:7px;top:0;width:2px;height:16px;transition:transform .18s var(--ease),opacity .18s var(--ease)}
.faq-item.is-open .faq-ico::after{transform:rotate(90deg);opacity:0}
.faq-a{padding:0 20px 18px;font-size:15px;line-height:1.8;color:var(--ink-600)}
.faq-a p{margin:0}

/* ============ CTA 带 ============ */
.cta-band{
  margin-top:64px;border-radius:var(--radius-card);padding:40px 32px;color:#fff;position:relative;overflow:hidden;
  background:linear-gradient(120deg,#1F4A85 0%,#2A5B9E 100%);
}
.cta-band::after{
  content:"";position:absolute;inset:0;opacity:.12;pointer-events:none;
  background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
}
.cta-inner{position:relative;z-index:1;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px}
.cta-inner h2{font-size:24px;line-height:1.4;font-weight:700;margin:0 0 8px;color:#fff}
.cta-inner p{margin:0;font-size:15px;color:rgba(255,255,255,.86);max-width:56ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-band .btn.btn-light-brand{background:#fff;border:1px solid #fff;color:var(--brand-700);font-weight:600;border-radius:var(--radius-btn);padding:.7rem 1.2rem}
.cta-band .btn.btn-light-brand:hover{background:var(--brand-50);color:var(--brand-700);transform:translateY(-1px)}
.cta-band .btn.btn-outline-light-brand{background:transparent;border:1px solid rgba(255,255,255,.6);color:#fff;border-radius:var(--radius-btn);padding:.7rem 1.2rem}
.cta-band .btn.btn-outline-light-brand:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);color:var(--ink-300);margin-top:72px;padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.site-footer h4{font-size:14px;font-weight:600;color:#fff;margin:0 0 14px}
.site-footer p{margin:0;font-size:14px;line-height:1.8;color:var(--ink-300);max-width:34ch}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--ink-300);text-decoration:none;transition:color .18s var(--ease)}
.footer-links a:hover{color:#fff}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.1);padding:20px 0;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:var(--ink-400);
}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .2s var(--ease),transform .2s var(--ease)}
.reveal.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  :root{--side-w:200px}
  .nav-item{font-size:13px}
  .brand-text strong{font-size:14px}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:991px){
  .sidebar{display:none}
  .topbar{display:flex}
  .app-main{margin-left:0;padding:0 0 64px}
  .container-x{padding:0 18px}
  .post-hero{margin:0 0 28px;padding:20px 0 28px}
  .post-hero>.hero-inner{padding:0 18px}
  .main-inner{padding:0 18px}
  .block{margin-top:48px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  body{font-size:15px}
  .rel-grid{grid-template-columns:1fr}
  .cta-band{padding:30px 20px}
  .cta-inner h2{font-size:20px}
  .post-actions .btn{flex:1 1 100%;text-align:center}
  .article-body h2{font-size:20px}
  .article-body h3{font-size:17px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:519px){
  .container-x{padding:0 14px}
  .main-inner{padding:0 14px}
  .post-hero>.hero-inner{padding:0 14px}
  .post-hero h1{font-size:22px}
  .block-head h2{font-size:20px}
  .footer-grid{gap:20px}
}

/* roulang page: category1 */
:root{
  --brand-600:#2A5B9E;
  --brand-700:#1F4A85;
  --brand-50:#EEF4FB;
  --brand-200:#C7D9EE;
  --accent-500:#E8A33D;
  --ink-900:#16202B;
  --ink-600:#4A5A6B;
  --ink-400:#8A97A6;
  --ink-300:#C9D2DC;
  --line:#E3E9F0;
  --bg:#F7F9FC;
  --surface:#FFFFFF;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-sm:0 1px 2px rgba(22,32,43,.06);
  --shadow-md:0 8px 24px -12px rgba(22,32,43,.14);
  --shadow-hover:0 14px 34px -14px rgba(22,32,43,.20);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-w:240px;
  --bs-primary:#2A5B9E;
  --bs-link-color:#2A5B9E;
  --bs-link-hover-color:#1F4A85;
  --bs-border-color:#E3E9F0;
  --bs-body-color:#4A5A6B;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink-600);
  background:var(--surface);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand-600);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4{color:var(--ink-900);margin:0;letter-spacing:0;font-weight:700}
h1{font-size:clamp(30px,4vw,44px);line-height:1.25}
h2{font-size:28px;line-height:1.35}
h3{font-size:20px;font-weight:600;line-height:1.45}
h4{font-size:14px;font-weight:600}
p{margin:0 0 16px;max-width:72ch}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid rgba(42,91,158,.35);outline-offset:2px;border-radius:6px}
.num{font-variant-numeric:tabular-nums}

/* ---------- 布局骨架 ---------- */
.side-nav{
  position:fixed;top:0;left:0;width:var(--nav-w);height:100vh;
  background:var(--surface);border-right:1px solid var(--line);
  padding:0 16px 24px;display:flex;flex-direction:column;overflow-y:auto;z-index:1020;
}
.brand-area{
  height:88px;display:flex;align-items:center;gap:10px;flex:0 0 auto;
  border-bottom:1px solid var(--line);margin-bottom:16px;
}
.brand-mark{
  width:34px;height:34px;border-radius:9px;background:var(--brand-600);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;
  letter-spacing:.02em;flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:15px;color:var(--ink-900);font-weight:700}
.brand-text span{font-size:11.5px;color:var(--ink-400)}
.nav-group-label{
  display:block;font-size:11.5px;color:var(--ink-400);letter-spacing:.08em;
  margin:10px 0 6px;padding-left:14px;text-transform:uppercase;
}
.nav-item{
  position:relative;display:flex;align-items:center;height:44px;padding:0 14px;
  border-radius:var(--radius-btn);color:var(--ink-600);font-size:14.5px;
  text-decoration:none;transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-item:hover{background:#F5F8FC;color:var(--ink-900)}
.nav-item.is-active{background:var(--brand-50);color:var(--brand-700);font-weight:600}
.nav-item.is-active::before{
  content:"";position:absolute;left:-16px;top:10px;bottom:10px;width:3px;
  border-radius:2px;background:var(--brand-600);
}
.nav-divider{height:1px;background:var(--line);margin:12px 0}
.nav-foot{margin-top:auto;padding-top:18px;border-top:1px solid var(--line)}
.nav-foot p{font-size:12.5px;color:var(--ink-400);margin:0 0 10px;line-height:1.6}
.nav-cta{
  display:flex;align-items:center;justify-content:center;height:44px;border-radius:var(--radius-btn);
  background:var(--brand-600);color:#fff;font-size:14px;font-weight:600;text-decoration:none;
  transition:background .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-cta:hover{background:var(--brand-700);color:#fff;box-shadow:var(--shadow-md)}

.topbar{
  display:none;position:sticky;top:0;z-index:1030;height:60px;align-items:center;
  justify-content:space-between;padding:0 16px;background:var(--surface);
  border-bottom:1px solid var(--line);
}
.topbar .brand-text strong{font-size:14.5px}
.hamburger{
  width:44px;height:44px;border:1px solid var(--line);background:var(--surface);
  border-radius:10px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  color:var(--ink-900);transition:background .18s var(--ease);
}
.hamburger:hover{background:#F5F8FC}
.offcanvas{width:min(82vw,320px)!important;border-right:1px solid var(--line)}
.offcanvas-body{padding:0 16px 24px;display:flex;flex-direction:column;height:100%}

.content-shell{margin-left:var(--nav-w)}
.container-x{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-alt{background:var(--bg);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:600;color:var(--brand-600);
  letter-spacing:.08em;margin-bottom:14px;
}
.section-head{max-width:760px;margin-bottom:48px}
.section-head h2{margin-bottom:12px}
.section-head p{font-size:16px;color:var(--ink-600);margin:0}

/* ---------- 分类介绍带 ---------- */
.cat-hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#F1F6FC 0%, #FFFFFF 100%);
  border-bottom:1px solid var(--line);
  padding:72px 0 56px;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(180deg, rgba(42,91,158,.07) 0 1px, transparent 1px 28px);
}
.cat-hero .container-x{position:relative;z-index:1}
.crumb{font-size:13px;color:var(--ink-400);margin-bottom:18px}
.crumb a{color:var(--ink-400);text-decoration:none}
.crumb a:hover{color:var(--brand-600)}
.crumb .sep{margin:0 8px}
.crumb .current{color:var(--ink-900);font-weight:600}
.cat-hero h1{margin-bottom:16px;max-width:20em}
.cat-hero .lede{font-size:17px;color:var(--ink-600);max-width:62ch;margin-bottom:26px}
.hero-stats{display:flex;flex-wrap:wrap;gap:28px;margin:26px 0 30px}
.hero-stats div{min-width:120px}
.hero-stats b{display:block;font-size:26px;color:var(--ink-900);font-variant-numeric:tabular-nums;line-height:1.2}
.hero-stats span{font-size:13px;color:var(--ink-400)}
.anchor-nav{display:flex;flex-wrap:wrap;gap:10px}
.anchor-nav a{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;
  background:var(--surface);border:1px solid var(--brand-200);color:var(--brand-600);
  font-size:13.5px;text-decoration:none;transition:background .18s var(--ease),color .18s var(--ease);
}
.anchor-nav a:hover{background:var(--brand-600);color:#fff;border-color:var(--brand-600)}

/* ---------- 交替图文 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split + .split{margin-top:72px}
.split-media img{width:100%;height:320px;object-fit:cover;border-radius:var(--radius-img);border:1px solid rgba(22,32,43,.06);box-shadow:var(--shadow-sm)}
.split.is-reverse .split-media{order:2}
.split-body .tag{
  display:inline-block;font-size:12px;font-weight:600;color:var(--brand-600);
  background:var(--brand-50);border-radius:999px;padding:2px 10px;margin-bottom:14px;height:24px;line-height:20px;
}
.split-body h3{margin-bottom:12px}
.check-list li{
  position:relative;padding-left:28px;margin-bottom:10px;font-size:15.5px;color:var(--ink-600);
}
.check-list li::before{
  content:"";position:absolute;left:0;top:6px;width:16px;height:16px;border-radius:50%;
  background:var(--brand-50);border:1px solid var(--brand-200);
}
.check-list li::after{
  content:"";position:absolute;left:5px;top:11px;width:6px;height:3px;
  border-left:2px solid var(--brand-600);border-bottom:2px solid var(--brand-600);
  transform:rotate(-45deg);
}

/* ---------- 行式清单 ---------- */
.rows{border-top:1px solid var(--line)}
.row-item{
  display:grid;grid-template-columns:220px 1fr 150px;gap:24px;align-items:center;
  padding:20px 0;border-bottom:1px solid var(--line);
  transition:background .18s var(--ease);
}
.row-item:hover{background:#F7FAFE}
.row-item .row-name{font-size:16px;font-weight:600;color:var(--ink-900)}
.row-item .row-desc{font-size:15px;color:var(--ink-600);margin:0}
.row-item .row-freq{
  font-size:13.5px;color:var(--brand-600);font-weight:600;
  font-variant-numeric:tabular-nums;text-align:right;
}
.rows-note{font-size:13px;color:var(--ink-400);margin-top:18px}

/* ---------- 流程刻度 ---------- */
.flow{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding-top:34px}
.flow::before{
  content:"";position:absolute;top:10px;left:8px;right:8px;height:1px;background:var(--brand-200);
}
.flow-step{position:relative;padding-right:8px}
.flow-step .dot{
  position:absolute;top:-34px;left:0;width:22px;height:22px;border-radius:50%;
  background:var(--surface);border:1px solid var(--brand-600);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;
  font-variant-numeric:tabular-nums;
}
.flow-step h3{font-size:17px;margin-bottom:8px}
.flow-step p{font-size:14.5px;margin:0;color:var(--ink-600)}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:var(--surface);border-radius:12px;box-shadow:var(--shadow-sm);
  border:1px solid var(--line);overflow:hidden;transition:background .18s var(--ease);
}
.faq-item:hover{background:#F5F8FC}
.faq-item.is-open{background:var(--surface);border-color:var(--brand-200)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;background:none;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--ink-900);position:relative;
}
.faq-item.is-open .faq-q::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;
  border-radius:2px;background:var(--brand-600);
}
.faq-q .arrow{
  flex:0 0 auto;width:18px;height:18px;transition:transform .2s var(--ease);color:var(--ink-400);
}
.faq-item.is-open .faq-q .arrow{transform:rotate(180deg);color:var(--brand-600)}
.faq-a{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--ink-600);display:none;max-width:70ch}
.faq-item.is-open .faq-a{display:block}

/* ---------- CTA + 表单 ---------- */
.cta-band{
  background:var(--brand-50);border-top:1px solid var(--brand-200);
  padding:72px 0;
}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.cta-copy h2{margin-bottom:14px}
.cta-copy p{font-size:16px;margin-bottom:20px}
.cta-points li{position:relative;padding-left:20px;font-size:14.5px;color:var(--ink-600);margin-bottom:8px}
.cta-points li::before{
  content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:50%;
  background:var(--accent-500);
}
.form-card{
  background:var(--surface);border-radius:var(--radius-card);padding:28px;
  box-shadow:var(--shadow-md);border:1px solid var(--line);
}
.form-card h3{font-size:18px;margin-bottom:6px}
.form-card .hint{font-size:13px;color:var(--ink-400);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink-900);margin-bottom:6px}
.field label .req{color:#D64545;margin-left:2px}
.field input,.field textarea,.field select{
  width:100%;border:1px solid var(--line);border-radius:var(--radius-btn);
  padding:0 14px;height:46px;font-size:15px;color:var(--ink-900);background:var(--surface);
  font-family:inherit;transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field textarea{height:auto;min-height:88px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(42,91,158,.15);
}
.btn-main,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;
  text-decoration:none;cursor:pointer;border:1px solid transparent;
  transition:background .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.btn-main{background:var(--brand-600);color:#fff;border-color:var(--brand-600)}
.btn-main:hover{background:var(--brand-700);color:#fff;box-shadow:var(--shadow-hover);transform:translateY(-1px)}
.btn-ghost{background:var(--surface);color:var(--brand-600);border-color:var(--brand-200)}
.btn-ghost:hover{background:var(--brand-50);color:var(--brand-700)}
.btn-block{width:100%}
.form-note{
  display:none;margin-top:14px;padding:12px 14px;border-radius:var(--radius-btn);
  background:var(--brand-50);border:1px solid var(--brand-200);
  color:var(--brand-700);font-size:14px;
}
.form-note.is-show{display:block}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 22px;
  border-radius:999px;background:var(--brand-600);color:#fff;font-size:14.5px;font-weight:600;
  text-decoration:none;box-shadow:var(--shadow-hover);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.float-cta.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:var(--brand-700);color:#fff}
.mobile-bar{display:none}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:#fff;padding:64px 0 28px;margin-top: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;margin-bottom:14px}
.site-footer p{color:var(--ink-300);font-size:14px;max-width:34ch;line-height:1.7}
.site-footer h4{color:#fff;margin-bottom:14px;letter-spacing:.02em}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:var(--ink-300);font-size:14px;text-decoration:none;transition:color .18s var(--ease)}
.footer-links a:hover{color:#fff}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:var(--ink-400);
}

/* ---------- 进入视口淡入 ---------- */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .2s var(--ease),transform .2s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

section[id]{scroll-margin-top:80px}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  :root{--nav-w:200px}
  .side-nav{width:var(--nav-w);padding:0 12px 20px}
  .nav-item{font-size:13.5px;padding:0 12px}
  .nav-item.is-active::before{left:-12px}
  .brand-text span{display:none}
  .split{gap:36px}
}
@media (max-width:991.98px){
  .side-nav{display:none}
  .topbar{display:flex}
  .content-shell{margin-left:0}
  body{padding-bottom:80px}
  .section{padding:56px 0}
  .cat-hero{padding:40px 0 44px}
  .split{grid-template-columns:1fr;gap:24px}
  .split.is-reverse .split-media{order:0}
  .split + .split{margin-top:48px}
  .split-media img{height:240px}
  .row-item{grid-template-columns:1fr;gap:6px;padding:16px 0}
  .row-item .row-freq{text-align:left}
  .flow{grid-template-columns:1fr 1fr;gap:28px 20px}
  .flow::before{display:none}
  .flow-step{padding-top:34px}
  .flow-step .dot{top:0}
  .cta-grid{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .float-cta{display:none}
  .mobile-bar{
    display:flex;position:fixed;left:0;right:0;bottom:0;height:56px;z-index:1040;
    align-items:center;justify-content:space-between;gap:12px;padding:0 16px;
    background:var(--surface);border-top:1px solid var(--line);box-shadow:0 -6px 20px -14px rgba(22,32,43,.25);
  }
  .mobile-bar span{font-size:13px;color:var(--ink-400)}
  .mobile-bar a{
    display:inline-flex;align-items:center;height:40px;padding:0 18px;border-radius:var(--radius-btn);
    background:var(--brand-600);color:#fff;font-size:14px;font-weight:600;text-decoration:none;
  }
}
@media (max-width:767.98px){
  .container-x{padding:0 18px}
  h2{font-size:23px}
  .hero-stats{gap:20px}
  .hero-stats b{font-size:22px}
  .flow{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .form-card{padding:22px}
  .cta-band{padding:56px 0}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category2 */
:root{
  --brand-600:#2A5B9E;
  --brand-700:#1F4A85;
  --brand-50:#EEF4FB;
  --brand-200:#C7D9EE;
  --accent-500:#E8A33D;
  --ink-900:#16202B;
  --ink-600:#4A5A6B;
  --ink-400:#8A97A6;
  --line:#E3E9F0;
  --bg:#F7F9FC;
  --surface:#FFFFFF;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-sm:0 1px 2px rgba(22,32,43,.06);
  --shadow-md:0 8px 24px -12px rgba(22,32,43,.14);
  --shadow-lg:0 14px 34px -14px rgba(22,32,43,.20);
  --ease:cubic-bezier(.2,.7,.3,1);
  --side:240px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink-600);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{color:var(--ink-900);margin:0;font-weight:700;line-height:1.35;letter-spacing:0}
h1{font-size:clamp(30px,4vw,44px);line-height:1.25}
h2{font-size:clamp(23px,2.4vw,28px)}
h3{font-size:20px;font-weight:600}
h4{font-size:16px}
p{margin:0}
a{color:var(--brand-600);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}
a:hover{color:var(--brand-700)}
img{display:block;max-width:100%;border-radius:var(--radius-img)}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid rgba(42,91,158,.55);outline-offset:2px}
::selection{background:var(--brand-50);color:var(--brand-700)}
[id]{scroll-margin-top:80px}

/* 布局骨架 */
.side-nav-wrap{
  position:fixed;top:0;left:0;bottom:0;width:var(--side);
  background:#fff;border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  overflow-y:auto;z-index:1040;
}
.side-brand{
  height:88px;flex:0 0 88px;display:flex;align-items:center;gap:10px;
  padding:0 22px;border-bottom:1px solid var(--line);
}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--brand-600);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;letter-spacing:.04em;flex:0 0 34px;
}
.brand-text{font-size:17px;font-weight:700;color:var(--ink-900);text-decoration:none}
.brand-text:hover{color:var(--brand-700)}
.side-nav{display:flex;flex-direction:column;gap:4px;padding:18px 14px 8px}
.nav-group-label{
  font-size:12px;color:var(--ink-400);letter-spacing:.08em;
  padding:14px 14px 6px;
}
.nav-item{
  display:flex;align-items:center;min-height:44px;padding:0 14px;
  border-radius:10px;color:var(--ink-600);font-size:15px;text-decoration:none;
  position:relative;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-item:hover,.nav-item:focus-visible{background:#F5F8FC;color:var(--ink-900);text-decoration:none}
.nav-item.is-active{background:var(--brand-50);color:var(--brand-700);font-weight:600}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:11px;bottom:11px;width:3px;
  border-radius:3px;background:var(--brand-600);
}
.nav-divider{height:1px;background:var(--line);margin:12px 14px}
.side-foot{
  margin-top:auto;padding:18px 18px 6px;border-top:1px solid var(--line);
  display:flex;flex-direction:column;gap:10px;
}
.side-foot p{font-size:13px;color:var(--ink-400);line-height:1.6}
.side-foot .btn-mk{width:100%}

.content-wrap{margin-left:var(--side);display:flex;flex-direction:column;min-height:100vh}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* 移动端顶栏 */
.mobile-bar{
  display:none;position:sticky;top:0;z-index:1035;
  height:60px;background:#fff;border-bottom:1px solid var(--line);
  align-items:center;justify-content:space-between;padding:0 16px;
}
.mobile-bar .brand-text{font-size:16px}
.burger{
  width:44px;height:44px;border:1px solid var(--line);background:#fff;
  border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  color:var(--ink-900);cursor:pointer;
}
.burger:hover{background:#F5F8FC}
.offcanvas{width:min(82vw,320px)}
.offcanvas .offcanvas-header{border-bottom:1px solid var(--line);padding:16px 18px}
.offcanvas .offcanvas-title{font-size:16px;font-weight:700;color:var(--ink-900)}
.offcanvas .offcanvas-body{padding:12px 12px 24px;display:flex;flex-direction:column;gap:4px}

/* 按钮 */
.btn-mk{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--radius-btn);
  background:var(--brand-600);border:1px solid var(--brand-600);color:#fff;
  font-size:15px;font-weight:600;text-decoration:none;cursor:pointer;
  transition:background .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease);
}
.btn-mk:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md);text-decoration:none}
.btn-mk:active{transform:translateY(0);box-shadow:var(--shadow-sm)}
.btn-mk-ghost{background:#fff;color:var(--brand-700);border-color:var(--brand-200)}
.btn-mk-ghost:hover{background:var(--brand-50);color:var(--brand-700);border-color:var(--brand-200)}
.btn-mk-sm{min-height:40px;padding:0 16px;font-size:14px}

/* 通用板块 */
.section{padding:96px 0}
.section-white{background:var(--surface)}
.section-head{max-width:760px;margin-bottom:44px}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.08em;
  color:var(--brand-600);background:var(--brand-50);border-radius:999px;
  padding:5px 12px;margin-bottom:14px;
}
.section-sub{font-size:16px;color:var(--ink-600);margin-top:12px;max-width:72ch}

/* 分类介绍带 */
.cat-hero{
  position:relative;overflow:hidden;
  padding:76px 0 60px;
  background:linear-gradient(180deg,#FFFFFF 0%,var(--brand-50) 100%);
  border-bottom:1px solid var(--brand-200);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(180deg,rgba(42,91,158,.07) 0 1px,transparent 1px 34px);
}
.cat-hero .container-x{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:48px;align-items:center}
.hero-lead{font-size:17px;line-height:1.8;color:var(--ink-600);margin-top:16px;max-width:60ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-anchors{display:flex;flex-wrap:wrap;gap:8px;margin-top:30px}
.hero-anchors a{
  display:inline-flex;align-items:center;min-height:38px;padding:0 14px;
  border-radius:999px;background:#fff;border:1px solid var(--brand-200);
  color:var(--brand-700);font-size:14px;text-decoration:none;
  transition:background .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.hero-anchors a:hover{background:var(--brand-50);transform:translateY(-1px);box-shadow:var(--shadow-sm);color:var(--brand-700)}
.hero-media{
  border-radius:var(--radius-card);overflow:hidden;background:#fff;
  border:1px solid rgba(22,32,43,.06);box-shadow:var(--shadow-md);
}
.hero-media img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:0}

/* 交替图文 */
.feature-row{
  display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;
  padding:38px 0;
}
.feature-row + .feature-row{border-top:1px solid var(--line)}
.feature-row.reverse .feature-media{order:-1}
.feature-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border:1px solid rgba(22,32,43,.06);box-shadow:var(--shadow-md);
}
.feature-body h3{position:relative;padding-left:14px}
.feature-body h3::before{
  content:"";position:absolute;left:0;top:4px;bottom:4px;width:3px;
  border-radius:3px;background:var(--brand-600);
}
.feature-body p{margin-top:14px;max-width:60ch}
.point-list{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.point-list li{
  position:relative;padding-left:20px;font-size:15px;line-height:1.7;color:var(--ink-600);
}
.point-list li::before{
  content:"";position:absolute;left:2px;top:10px;width:7px;height:7px;
  border-radius:50%;background:var(--brand-200);border:1px solid var(--brand-600);
}

/* 场景卡片 */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.scene-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 24px;box-shadow:var(--shadow-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--brand-200)}
.scene-card .ico{
  width:38px;height:38px;border-radius:10px;background:var(--brand-50);
  color:var(--brand-600);display:inline-flex;align-items:center;justify-content:center;
  margin-bottom:14px;
}
.scene-card h3{font-size:17px}
.scene-card p{margin-top:8px;font-size:15px;line-height:1.75}
.scene-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:var(--brand-50);color:var(--brand-600);font-size:12px;font-weight:600;
}
.tag.neutral{background:#F2F5F9;color:var(--ink-600);font-weight:500}

/* 步骤刻度线 */
.step-track{display:grid;grid-template-columns:repeat(5,1fr);gap:0;margin-top:8px}
.step-track li{position:relative;padding:44px 26px 0 0}
.step-track li::before{
  content:"";position:absolute;left:32px;right:-6px;top:15px;height:1px;background:var(--line);
}
.step-track li:last-child::before{display:none}
.step-dot{
  position:absolute;left:0;top:0;width:32px;height:32px;border-radius:50%;
  background:#fff;border:1px solid var(--brand-200);color:var(--brand-600);
  font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;
}
.step-track h3{font-size:16px;font-weight:600}
.step-track p{margin-top:8px;font-size:14px;line-height:1.7;color:var(--ink-600)}

/* 行式清单 */
.list-rows{border-top:1px solid var(--line)}
.list-rows li{
  display:flex;gap:14px;align-items:flex-start;
  padding:18px 4px;border-bottom:1px solid var(--line);
}
.list-rows .ico{
  flex:0 0 26px;width:26px;height:26px;border-radius:8px;
  background:var(--brand-50);color:var(--brand-600);
  display:inline-flex;align-items:center;justify-content:center;margin-top:3px;
}
.list-rows .txt strong{display:block;color:var(--ink-900);font-size:16px;font-weight:600}
.list-rows .txt span{display:block;font-size:14.5px;line-height:1.7;margin-top:4px}

/* 数据行 */
.stat-list{border-top:1px solid var(--line)}
.stat-list li{
  display:grid;grid-template-columns:220px 1fr;gap:28px;align-items:baseline;
  padding:22px 4px;border-bottom:1px solid var(--line);
}
.stat-num{
  font-size:30px;font-weight:700;color:var(--ink-900);
  font-variant-numeric:tabular-nums;line-height:1.2;
}
.stat-num em{font-style:normal;font-size:14px;font-weight:600;color:var(--accent-500);margin-left:6px}
.stat-desc{font-size:15.5px;line-height:1.75}
.stat-note{margin-top:18px;font-size:13px;color:var(--ink-400)}

/* 表单 */
.form-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:30px;box-shadow:var(--shadow-md);
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-field{margin-bottom:18px}
.form-label{display:block;font-size:14px;font-weight:600;color:var(--ink-900);margin-bottom:6px}
.form-label .req{color:#D64545;margin-left:4px}
.form-control,.form-select{
  width:100%;height:46px;border-radius:var(--radius-btn);
  border:1px solid var(--line);background:#fff;color:var(--ink-900);
  font-size:15px;padding:0 14px;line-height:44px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
textarea.form-control{height:auto;min-height:96px;line-height:1.7;padding:12px 14px;resize:vertical}
.form-control::placeholder{color:var(--ink-400)}
.form-control:focus,.form-select:focus{
  outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(42,91,158,.15);
}
.form-hint{font-size:13px;color:var(--ink-400);margin-top:12px}
.form-alert{
  display:none;margin-top:16px;padding:12px 16px;border-radius:var(--radius-btn);
  background:var(--brand-50);border:1px solid var(--brand-200);color:var(--brand-700);font-size:14px;
}
.form-alert.is-show{display:block}

/* CTA 带 */
.cta-band{
  background:linear-gradient(180deg,var(--brand-50) 0%,#FFFFFF 100%);
  border-top:1px solid var(--brand-200);border-bottom:1px solid var(--brand-200);
}
.cta-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:48px;align-items:start}
.cta-points{margin-top:24px;display:flex;flex-direction:column;gap:12px}
.cta-points li{display:flex;gap:10px;font-size:15px;line-height:1.7}
.cta-points .ico{
  flex:0 0 22px;width:22px;height:22px;border-radius:999px;background:#fff;
  color:var(--brand-600);border:1px solid var(--brand-200);
  display:inline-flex;align-items:center;justify-content:center;margin-top:4px;
}

/* FAQ */
.faq-acc .accordion-item{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  margin-bottom:12px;overflow:hidden;
}
.faq-acc .accordion-item:last-child{margin-bottom:0}
.faq-acc .accordion-button{
  background:#fff;color:var(--ink-900);font-size:16px;font-weight:600;
  padding:18px 52px 18px 20px;line-height:1.6;border:0;box-shadow:none;
  transition:background .18s var(--ease);
}
.faq-acc .accordion-button:hover{background:#F5F8FC}
.faq-acc .accordion-button:not(.collapsed){background:#fff;color:var(--brand-700);box-shadow:none}
.faq-acc .accordion-button:not(.collapsed)::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  border-radius:3px;background:var(--brand-600);
}
.faq-acc .accordion-button{position:relative}
.faq-acc .accordion-button:focus{box-shadow:0 0 0 3px rgba(42,91,158,.15);z-index:2}
.faq-acc .accordion-button::after{
  width:16px;height:16px;background-size:16px;
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%234A5A6B'%3E%3Cpath d='M8 11.2 2.6 5.8 4 4.4l4 4 4-4 1.4 1.4z'/%3E%3C/svg%3E");
  transition:transform .18s var(--ease);
}
.faq-acc .accordion-body{
  padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--ink-600);
}

/* 页脚 */
.site-footer{background:#16202B;color:#C9D3DE;padding:64px 0 28px;margin-top:auto}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.footer-brand .brand-mark{background:var(--brand-600)}
.footer-grid p{font-size:14px;line-height:1.75;color:#A9B6C4;max-width:40ch}
.footer-grid h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:#A9B6C4;font-size:14px;text-decoration:none;transition:color .18s var(--ease)}
.footer-links a:hover{color:#fff;text-decoration:none}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:#8A97A6;
}

/* 移动端底部固定条 */
.mobile-cta-bar{display:none}

/* 动效 */
.js .reveal{opacity:0;transform:translateY(8px);transition:opacity .22s var(--ease),transform .22s var(--ease)}
.js .reveal.is-visible{opacity:1;transform:none}

/* 断点 */
@media (max-width:1439.98px){
  .cat-hero{padding:68px 0 54px}
}
@media (max-width:1199.98px){
  :root{--side:200px}
  .side-nav .nav-item{font-size:14px}
  .nav-item{font-size:14px}
  .section{padding:72px 0}
  .feature-row{gap:36px}
  .cta-grid{gap:36px}
  .hero-grid{gap:36px}
}
@media (max-width:991.98px){
  .side-nav-wrap{display:none}
  .content-wrap{margin-left:0;padding-bottom:76px}
  .mobile-bar{display:flex}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-media{order:2}
  .feature-row{grid-template-columns:1fr;gap:26px;padding:30px 0}
  .feature-row.reverse .feature-media{order:0}
  .step-track{grid-template-columns:1fr;gap:0}
  .step-track li{padding:0 0 0 48px;min-height:56px}
  .step-track li::before{left:15px;top:34px;bottom:-6px;right:auto;width:1px;height:auto}
  .step-track li:last-child::before{display:none}
  .step-track li + li{margin-top:22px}
  .cta-grid{grid-template-columns:1fr;gap:32px}
  .mobile-cta-bar{
    display:flex;position:fixed;left:0;right:0;bottom:0;height:64px;
    background:#fff;border-top:1px solid var(--line);z-index:1035;
    align-items:center;justify-content:space-between;gap:12px;padding:0 16px;
    box-shadow:0 -4px 18px -12px rgba(22,32,43,.25);
  }
  .mobile-cta-bar span{font-size:13px;color:var(--ink-600);line-height:1.4}
}
@media (max-width:767.98px){
  .section{padding:56px 0}
  .container-x{padding:0 18px}
  .cat-hero{padding:52px 0 44px}
  .hero-lead{font-size:16px}
  .scene-grid{grid-template-columns:1fr}
  .stat-list li{grid-template-columns:1fr;gap:6px}
  .stat-num{font-size:26px}
  .form-row{grid-template-columns:1fr}
  .form-card{padding:22px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{margin-top:32px}
  .hero-actions .btn-mk{width:100%}
}
@media (max-width:520px){
  h1{font-size:28px}
  .section-head{margin-bottom:32px}
  .faq-acc .accordion-button{font-size:15px;padding:16px 46px 16px 16px}
  .faq-acc .accordion-body{padding:0 16px 18px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none !important;transition:none !important}
  .js .reveal{opacity:1;transform:none}
}