/* roulang page: index */
:root{
  --ink-900:#14101F;
  --brand-700:#3A1E6E;
  --brand-600:#4C2A8C;
  --brand-050:#F1ECFA;
  --accent-500:#FF7A45;
  --accent-100:#FFE9DF;
  --paper:#F7F5F2;
  --surface:#FFFFFF;
  --line:#E6E1DC;
  --text:#17131F;
  --text-muted:#6E6877;
  --ok:#12A67A;
  --warn:#E8A33D;
  --r-card:16px;
  --r-img:14px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(20,16,31,.06),0 8px 24px -12px rgba(20,16,31,.14);
  --shadow-2:0 2px 4px rgba(20,16,31,.08),0 18px 40px -16px rgba(20,16,31,.22);
  --ease:cubic-bezier(.2,.7,.2,1);
  --nav-h:68px;
  --anchor-h:52px;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:136px;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  --nav-h:68px;
}
body.scrolled{--nav-h:60px;}
body.nav-locked{overflow:hidden;}
img{max-width:100%;height:auto;display:block;border-radius:0;}
a{color:var(--brand-700);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--accent-500);}
h1,h2,h3,h4,h5,h6{margin:0;font-family:inherit;color:var(--text);line-height:1.2;}
h1{font-size:clamp(34px,5.2vw,72px);font-weight:900;letter-spacing:-.02em;line-height:1.06;}
h2{font-size:clamp(26px,3.2vw,40px);font-weight:800;letter-spacing:-.01em;}
h3{font-size:21px;font-weight:700;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand-700);outline-offset:2px;border-radius:4px;}
.mono,.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;font-family:var(--mono);}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.section{padding:110px 0;}
.section--tight{padding:84px 0;}
.section--dark{background:var(--ink-900);color:#fff;}
.section--dark h2,.section--dark h3{color:#fff;}
.section--dark .muted{color:rgba(255,255,255,.66);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand-700);
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent-500);display:inline-block;}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:48px;}
.sec-head p{max-width:560px;color:var(--text-muted);font-size:16px;}
.lead{color:var(--text-muted);font-size:17px;line-height:1.8;}
.muted{color:var(--text-muted);}
.rule{height:1px;background:var(--line);border:0;margin:0;}
.big-num{
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:clamp(40px,5vw,56px);font-weight:800;line-height:1;
  color:var(--brand-050);
}
.big-num--outline{
  color:transparent;-webkit-text-stroke:1.5px var(--brand-050);
}

/* 顶部状态条 */
.status-bar{background:var(--ink-900);color:rgba(255,255,255,.82);font-size:13px;}
.status-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:32px;padding-top:4px;padding-bottom:4px;}
.status-tag{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:#fff;white-space:nowrap;}
.status-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 3px rgba(18,166,122,.22);}
.status-count{display:inline-flex;align-items:center;gap:8px;white-space:nowrap;}
.status-count strong{color:var(--accent-500);font-family:var(--mono);font-variant-numeric:tabular-nums;font-weight:700;letter-spacing:.02em;}

/* 主导航 */
.site-header{
  position:sticky;top:0;z-index:70;background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease);
  backdrop-filter:saturate(150%) blur(6px);
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);}
.nav-inner{display:flex;align-items:center;gap:28px;height:var(--nav-h);transition:height .22s var(--ease);}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:28px;height:28px;border-radius:8px;background:var(--brand-700);position:relative;flex:0 0 28px;
}
.brand-mark::before{content:"";position:absolute;left:6px;top:6px;width:9px;height:9px;border-radius:3px;background:var(--accent-500);}
.brand-mark::after{content:"";position:absolute;right:6px;bottom:6px;width:7px;height:7px;border-radius:2px;background:#fff;opacity:.9;}
.brand-text{font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--ink-900);}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto;}
.main-nav a{
  position:relative;font-size:15px;font-weight:600;color:var(--text);padding:8px 0;min-height:44px;display:inline-flex;align-items:center;
}
.main-nav a::after{
  content:"";position:absolute;left:0;bottom:4px;height:2px;width:0;background:var(--accent-500);
  transition:width .22s var(--ease);
}
.main-nav a:hover::after{width:100%;}
.main-nav a:hover{color:var(--ink-900);}
.main-nav a.is-active{color:var(--ink-900);}
.main-nav a.is-active::after{width:100%;}
.nav-actions{display:flex;align-items:center;gap:18px;flex:0 0 auto;}
.link-plain{font-size:15px;font-weight:600;color:var(--brand-700);border-bottom:1px solid rgba(58,30,110,.28);padding-bottom:2px;}
.link-plain:hover{color:var(--accent-500);border-color:var(--accent-500);}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:700;line-height:1;cursor:pointer;
  border:1px solid transparent;transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
  text-align:center;
}
.btn-primary{background:var(--brand-700);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover,.btn-primary:focus-visible{background:var(--accent-500);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2);}
.btn-outline{background:transparent;color:var(--brand-700);border-color:rgba(58,30,110,.32);}
.btn-outline:hover,.btn-outline:focus-visible{background:var(--brand-050);border-color:var(--brand-700);color:var(--brand-700);transform:translateY(-2px);}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.45);}
.btn-ghost-light:hover{background:#fff;color:var(--ink-900);border-color:#fff;}
.btn-light{background:#fff;color:var(--ink-900);}
.btn-light:hover{background:var(--accent-500);color:#fff;transform:translateY(-2px);}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}

/* 锚点条 */
.anchor-bar{
  position:sticky;top:var(--nav-h);z-index:60;background:rgba(247,245,242,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(150%) blur(6px);
  transition:top .22s var(--ease);
}
.anchor-inner{display:flex;align-items:center;gap:10px;height:var(--anchor-h);overflow-x:auto;scrollbar-width:none;}
.anchor-inner::-webkit-scrollbar{display:none;}
.anchor-link{
  flex:0 0 auto;display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:var(--r-pill);
  font-size:14px;font-weight:600;color:var(--text-muted);border:1px solid transparent;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.anchor-link:hover{color:var(--brand-700);border-color:rgba(58,30,110,.24);background:#fff;}
.anchor-link.is-active{background:var(--accent-500);color:#fff;border-color:var(--accent-500);}
.anchor-link.is-active:hover{color:#fff;background:var(--accent-500);}

/* Hero */
.hero{position:relative;padding:72px 0 96px;overflow:hidden;background:var(--paper);}
.hero-bg{position:absolute;inset:0;z-index:0;}
.hero-bg img{width:100%;height:100%;object-fit:cover;}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(112deg,rgba(247,245,242,.97) 0%,rgba(247,245,242,.92) 46%,rgba(58,30,110,.62) 100%);
}
.hero .container{position:relative;z-index:1;}
.hero-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:56px;align-items:center;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-pill);padding:7px 16px;font-size:13px;font-weight:700;color:var(--brand-700);
  box-shadow:var(--shadow-1);
}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--accent-500);}
.hero h1{margin:22px 0 20px;}
.hero h1 .mark{
  color:var(--brand-700);border-bottom:3px solid var(--accent-500);padding-bottom:2px;
}
.hero-sub{font-size:19px;line-height:1.7;color:var(--text-muted);max-width:520px;}
.hero-points{margin:26px 0 32px;display:grid;gap:12px;}
.hero-points li{
  position:relative;padding-left:16px;font-size:15px;color:var(--text);
  border-left:3px solid var(--accent-500);line-height:1.6;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
.hero-stats{display:flex;flex-wrap:wrap;gap:36px;margin-top:42px;padding-top:26px;border-top:1px solid var(--line);}
.hero-stats .stat b{display:block;font-size:26px;font-weight:800;color:var(--ink-900);font-family:var(--mono);font-variant-numeric:tabular-nums;line-height:1.2;}
.hero-stats .stat span{font-size:13px;color:var(--text-muted);}
.hero-visual{position:relative;}
.hero-visual .frame{
  border-radius:20px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-2);
  aspect-ratio:16/10;background:linear-gradient(135deg,var(--brand-050),#fff);
}
.hero-visual .frame img{width:100%;height:100%;object-fit:cover;}
.hero-float{
  position:absolute;left:-18px;bottom:-24px;background:#fff;border-radius:14px;border:1px solid var(--line);
  box-shadow:var(--shadow-2);padding:16px 18px;min-width:210px;
}
.hero-float .tag{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;color:var(--ok);
  background:rgba(18,166,122,.1);border-radius:6px;padding:3px 8px;
}
.hero-float .tag .dot{width:6px;height:6px;border-radius:50%;background:var(--ok);}
.hero-float .count{display:block;margin-top:10px;font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:22px;font-weight:800;color:var(--ink-900);}
.hero-float small{display:block;font-size:12px;color:var(--text-muted);margin-top:2px;}
.hero-index{
  position:absolute;right:-10px;top:-28px;font-family:var(--mono);font-size:52px;font-weight:800;
  color:transparent;-webkit-text-stroke:1.5px var(--brand-050);
}

/* 卖点列表 */
.features-grid{display:grid;grid-template-columns:.85fr 2fr;gap:64px;align-items:start;}
.feature-list{border-top:1px solid var(--line);}
.feature-row{
  display:grid;grid-template-columns:64px 1fr;gap:20px;
  padding:26px 0;border-bottom:1px solid var(--line);
  transition:transform .22s var(--ease),padding .22s var(--ease);
}
.feature-row:hover{transform:translateX(4px);}
.feature-row .idx{font-family:var(--mono);font-size:14px;font-weight:700;color:var(--text-muted);padding-top:6px;letter-spacing:.06em;}
.feature-row h3{transition:color .2s var(--ease);}
.feature-row:hover h3{color:var(--accent-500);}
.feature-row p{margin:8px 0 12px;color:var(--text-muted);font-size:15.5px;max-width:640px;}
.text-link{font-size:15px;font-weight:700;color:var(--brand-700);display:inline-flex;align-items:center;gap:6px;min-height:44px;}
.text-link::after{content:"→";transition:transform .2s var(--ease);}
.text-link:hover::after{transform:translateX(4px);}

/* 演示 */
.demo-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.demo-row + .demo-row{margin-top:88px;}
.demo-row.reverse .demo-media{order:2;}
.demo-media{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-1);
  aspect-ratio:16/9;background:var(--brand-050);
}
.demo-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.demo-media:hover img{transform:scale(1.03);}
.demo-body .eyebrow{margin-bottom:14px;}
.demo-body h2{margin-bottom:18px;}
.demo-body p{color:var(--text-muted);font-size:16.5px;margin-bottom:14px;}
.demo-body .btn{margin-top:12px;}

/* 证据 */
.proof-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:56px;align-items:center;}
.proof-media{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);aspect-ratio:4/3;background:var(--brand-050);}
.proof-media img{width:100%;height:100%;object-fit:cover;}
.proof-item{padding:22px 0;border-bottom:1px solid var(--line);}
.proof-item b{display:block;font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:clamp(36px,4vw,50px);font-weight:800;color:var(--ink-900);line-height:1.1;}
.proof-item span{font-size:13px;color:var(--text-muted);}
.proof-bar{margin-top:26px;}
.proof-bar .bar-track{height:6px;border-radius:6px;background:var(--brand-050);overflow:hidden;}
.proof-bar .bar-fill{height:100%;border-radius:6px;background:var(--brand-700);transition:width .8s var(--ease);}
.proof-bar small{display:block;margin-top:10px;font-size:13px;color:var(--text-muted);}

/* 价格 */
.pricing-grid{display:grid;grid-template-columns:.85fr 2.15fr;gap:56px;align-items:start;}
.pricing-aside{position:sticky;top:150px;}
.pricing-aside h2{margin:14px 0 18px;}
.pricing-aside .lead{margin-bottom:20px;}
.pricing-note{font-size:13px;color:var(--text-muted);border-left:3px solid var(--line);padding-left:12px;}
.price-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;}
.price-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px 24px;box-shadow:var(--shadow-1);position:relative;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.price-card--main{
  background:var(--brand-700);color:#fff;border-color:var(--brand-700);transform:translateY(-16px);
}
.price-card--main:hover{transform:translateY(-20px);}
.price-card--main .price-name,.price-card--main .price-desc,.price-card--main .price-num,.price-card--main .price-unit{color:#fff;}
.price-card--main .price-list li{color:rgba(255,255,255,.86);border-color:rgba(255,255,255,.18);}
.price-card--main .price-list li i{color:var(--accent-500);}
.price-corner{
  position:absolute;top:-12px;right:20px;background:var(--accent-500);color:#fff;font-size:12px;font-weight:700;
  border-radius:6px;padding:4px 10px;letter-spacing:.04em;
}
.price-name{font-size:18px;font-weight:800;}
.price-desc{font-size:13.5px;color:var(--text-muted);margin:8px 0 18px;line-height:1.6;min-height:44px;}
.price-num{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:38px;font-weight:800;line-height:1;}
.price-unit{font-size:13px;color:var(--text-muted);margin-left:6px;font-weight:600;}
.price-list{margin:20px 0 24px;border-top:1px solid var(--line);}
.price-card--main .price-list{border-color:rgba(255,255,255,.18);}
.price-list li{
  display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--text-muted);
  padding:11px 0;border-bottom:1px solid var(--line);
}
.price-list li i{color:var(--ok);font-size:13px;margin-top:5px;}
.price-card--main .btn-primary{background:#fff;color:var(--brand-700);}
.price-card--main .btn-primary:hover{background:var(--accent-500);color:#fff;}

/* 资讯 */
.news-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:40px;}
.news-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  height:100%;display:flex;flex-direction:column;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(58,30,110,.18);}
.news-cover{display:block;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,var(--brand-050),var(--brand-700));}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.news-card:hover .news-cover img{transform:scale(1.04);}
.news-body{padding:22px 22px 20px;display:flex;flex-direction:column;flex:1 1 auto;}
.chip{
  display:inline-flex;align-items:center;align-self:flex-start;
  background:var(--brand-050);color:var(--brand-700);font-size:12px;font-weight:700;
  border-radius:6px;padding:4px 10px;letter-spacing:.02em;
}
.news-title{margin:14px 0 10px;font-size:18px;font-weight:700;line-height:1.45;}
.news-title a{color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card:hover .news-title a{color:var(--accent-500);}
.news-sum{
  color:var(--text-muted);font-size:14.5px;line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:16px;border-top:1px solid var(--line);}
.news-meta time{font-size:13px;color:var(--text-muted);font-family:var(--mono);font-variant-numeric:tabular-nums;}
.read-more{font-size:13.5px;font-weight:700;color:var(--brand-700);}
.read-more:hover{color:var(--accent-500);}
.news-grid{margin-top:8px;}
.news-grid > .cell{margin-bottom:24px;display:flex;}
.news-empty{
  border:1px dashed var(--line);border-radius:var(--r-card);background:var(--surface);
  padding:64px 24px;text-align:center;color:var(--text-muted);
}
.news-empty i{font-size:26px;color:var(--brand-700);display:block;margin-bottom:14px;}
.news-empty p{margin-bottom:18px;}
.load-more-wrap{display:flex;justify-content:center;margin-top:20px;}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 56px;}
.faq-col{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 0;background:none;border:0;text-align:left;cursor:pointer;
  font-size:16.5px;font-weight:700;color:var(--text);min-height:44px;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--accent-500);}
.faq-q .sign{position:relative;width:18px;height:18px;flex:0 0 18px;}
.faq-q .sign::before,.faq-q .sign::after{
  content:"";position:absolute;background:var(--brand-700);border-radius:2px;
  transition:transform .22s var(--ease),opacity .22s var(--ease),background .22s var(--ease);
}
.faq-q .sign::before{left:0;top:8px;width:18px;height:2px;}
.faq-q .sign::after{left:8px;top:0;width:2px;height:18px;}
.faq-q:hover .sign::before,.faq-q:hover .sign::after{background:var(--accent-500);}
.faq-item.open .sign::after{transform:rotate(90deg);opacity:0;}
.faq-a{display:none;padding:0 0 22px;font-size:15.5px;line-height:1.8;color:var(--text-muted);max-width:620px;}
.faq-item.open .faq-a{display:block;}

/* CTA 收口 */
.cta-block{
  background:var(--ink-900);color:#fff;border-radius:24px;padding:76px 32px;text-align:center;
  position:relative;overflow:hidden;
}
.cta-block::before{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,122,69,.28),transparent 70%);
}
.cta-block h2{color:#fff;margin-bottom:16px;position:relative;}
.cta-block p{color:rgba(255,255,255,.72);max-width:620px;margin:0 auto 32px;position:relative;font-size:16.5px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;position:relative;}

/* 页脚 */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);padding:76px 0 0;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:48px;padding-bottom:56px;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{background:var(--brand-600);}
.footer-brand .brand-text{color:#fff;font-size:18px;}
.footer-about{line-height:1.85;max-width:320px;color:rgba(255,255,255,.66);margin-bottom:18px;}
.footer-tag{display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(255,255,255,.2);border-radius:var(--r-pill);padding:6px 14px;font-size:13px;font-weight:700;color:#fff;}
.footer-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--ok);}
.footer-col h4{color:#fff;font-size:15px;font-weight:800;margin-bottom:20px;letter-spacing:.02em;}
.footer-col ul{display:grid;gap:12px;}
.footer-col a{color:rgba(255,255,255,.72);font-size:14px;}
.footer-col a:hover{color:var(--accent-500);}
.footer-col li span{color:rgba(255,255,255,.72);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:22px 0;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:rgba(255,255,255,.56);
}

/* 浮动 CTA */
.float-cta{
  position:fixed;right:24px;bottom:28px;z-index:80;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
}
.float-cta.show{opacity:1;visibility:visible;transform:none;}
.float-btn{
  display:inline-flex;align-items:center;gap:10px;background:var(--brand-700);color:#fff;
  border-radius:var(--r-pill);padding:0 22px;min-height:48px;font-size:15px;font-weight:700;
  box-shadow:var(--shadow-2);transition:background .2s var(--ease);
}
.float-btn:hover{background:var(--accent-500);color:#fff;}
.float-btn .dot{width:6px;height:6px;border-radius:50%;background:var(--accent-500);box-shadow:0 0 0 3px rgba(255,122,69,.28);}
.float-btn:hover .dot{background:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.3);}
.to-top{
  position:fixed;left:24px;bottom:28px;z-index:79;width:48px;height:48px;border-radius:50%;
  background:#fff;border:1px solid var(--line);color:var(--brand-700);font-size:18px;
  display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  box-shadow:var(--shadow-1);opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
}
.to-top.show{opacity:1;visibility:visible;transform:none;}
.to-top:hover{background:var(--brand-050);}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,16,31,.5);z-index:90;
  opacity:0;visibility:hidden;transition:opacity .22s var(--ease),visibility .22s;
}
.drawer-mask.show{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:280px;max-width:86vw;background:#fff;z-index:95;
  transform:translateX(100%);transition:transform .22s var(--ease);
  display:flex;flex-direction:column;box-shadow:var(--shadow-2);
}
.drawer.show{transform:none;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line);}
.drawer-head .brand-text{font-size:17px;}
.drawer-close{width:44px;height:44px;border:0;background:none;font-size:20px;color:var(--text);cursor:pointer;border-radius:10px;}
.drawer-close:hover{background:var(--brand-050);color:var(--brand-700);}
.drawer-nav{flex:1 1 auto;overflow-y:auto;}
.drawer-nav a{
  display:flex;align-items:center;min-height:56px;padding:0 20px;font-size:18px;font-weight:600;
  color:var(--text);border-bottom:1px solid var(--line);
}
.drawer-nav a:hover{color:var(--accent-500);background:var(--brand-050);}
.drawer-nav a.is-active{color:var(--brand-700);}
.drawer-foot{padding:18px 20px calc(18px + env(safe-area-inset-bottom));border-top:1px solid var(--line);}
.hamburger{
  display:none;width:44px;height:44px;border:0;background:none;cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;border-radius:10px;
}
.hamburger span{display:block;width:24px;height:2px;background:var(--ink-900);border-radius:2px;transition:transform .22s var(--ease),opacity .22s var(--ease);}
.hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.active span:nth-child(2){opacity:0;}
.hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* 动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
}

/* 响应式 */
@media (max-width:1023px){
  .main-nav{display:none;}
  .nav-actions .link-plain{display:none;}
  .hamburger{display:inline-flex;}
  .nav-inner{gap:16px;}
  .section{padding:72px 0;}
  .section--tight{padding:60px 0;}
  .hero{padding:48px 0 72px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-visual .frame{aspect-ratio:16/9;}
  .hero-float{left:0;bottom:-18px;padding:12px 14px;min-width:180px;}
  .features-grid{grid-template-columns:1fr;gap:36px;}
  .demo-row{grid-template-columns:1fr;gap:28px;}
  .demo-row.reverse .demo-media{order:0;}
  .demo-row + .demo-row{margin-top:64px;}
  .proof-grid{grid-template-columns:1fr;gap:32px;}
  .pricing-grid{grid-template-columns:1fr;gap:32px;}
  .pricing-aside{position:static;}
  .price-cards{grid-template-columns:1fr;gap:20px;}
  .price-card--main{transform:none;order:-1;}
  .price-card--main:hover{transform:translateY(-4px);}
  .faq-grid{grid-template-columns:1fr;gap:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .cta-block{padding:56px 24px;}
}
@media (max-width:639px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .section--tight{padding:48px 0;}
  .status-count{font-size:12px;}
  .status-tag{font-size:12px;}
  .hero-stats{gap:22px;}
  .hero-stats .stat b{font-size:22px;}
  .hero-sub{font-size:17px;}
  .hero-cta .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:40px;}
  .btn{min-height:46px;}
  .float-cta{right:0;left:0;bottom:0;}
  .float-btn{
    width:100%;border-radius:0;justify-content:center;
    min-height:64px;padding-bottom:env(safe-area-inset-bottom);
  }
  .to-top{left:16px;bottom:calc(80px + env(safe-area-inset-bottom));width:44px;height:44px;}
  .hero-index{font-size:40px;top:-18px;right:0;}
}

.reveal{opacity:1;transform:none;}

/* roulang page: article */
:root{
  --ink-900:#14101F;
  --brand-700:#3A1E6E;
  --brand-600:#4C2A8C;
  --brand-050:#F1ECFA;
  --accent-500:#FF7A45;
  --accent-100:#FFE9DF;
  --paper:#F7F5F2;
  --surface:#FFFFFF;
  --line:#E6E1DC;
  --text:#17131F;
  --text-muted:#6E6877;
  --ok:#12A67A;
  --warn:#E8A33D;
  --radius-lg:16px;
  --radius-md:14px;
  --radius-sm:10px;
  --pill:999px;
  --shadow-1:0 1px 2px rgba(20,16,31,.06),0 8px 24px -12px rgba(20,16,31,.14);
  --shadow-2:0 2px 6px rgba(20,16,31,.08),0 18px 40px -18px rgba(20,16,31,.24);
  --ease:cubic-bezier(.2,.7,.2,1);
  --header-h:68px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-num:"Inter","SF Pro Display","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
button{font-family:inherit;font-size:inherit;border:0;background:none;cursor:pointer;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
.mono{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
@media (max-width:639px){.container{padding:0 16px;}}
:focus-visible{outline:2px solid var(--brand-700);outline-offset:3px;border-radius:4px;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:11px 22px;border-radius:var(--pill);
  font-size:15px;font-weight:700;line-height:1;letter-spacing:.01em;
  border:1px solid transparent;transition:all .2s var(--ease);white-space:nowrap;
}
.btn-sm{min-height:38px;padding:9px 18px;font-size:14px;}
.btn-primary{background:var(--brand-700);color:#fff;box-shadow:0 6px 18px -10px rgba(58,30,110,.75);}
.btn-primary:hover{background:var(--accent-500);color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px -12px rgba(255,122,69,.8);}
.btn-outline{background:transparent;color:var(--brand-700);border-color:#CFC5E4;}
.btn-outline:hover{background:var(--brand-700);color:#fff;border-color:var(--brand-700);transform:translateY(-1px);}
.btn-light{background:#fff;color:var(--brand-700);}
.btn-light:hover{background:var(--accent-500);color:#fff;transform:translateY(-1px);}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.5);}
.btn-ghost-light:hover{background:#fff;color:var(--ink-900);border-color:#fff;}
.btn-block{width:100%;}
.link-plain{font-size:14px;font-weight:600;color:var(--text-muted);}
.link-plain:hover{color:var(--accent-500);}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--brand-700);}
.link-arrow::after{content:"→";transition:transform .2s var(--ease);}
.link-arrow:hover{color:var(--accent-500);}
.link-arrow:hover::after{transform:translateX(4px);}

/* ---------- Topbar & Header ---------- */
.topbar{background:var(--ink-900);color:rgba(255,255,255,.86);font-size:13px;}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:32px;}
.status-chip{display:inline-flex;align-items:center;gap:7px;font-weight:600;letter-spacing:.02em;}
.dot{width:6px;height:6px;border-radius:50%;background:var(--accent-500);display:inline-block;flex:none;}
.status-chip .dot{background:var(--ok);box-shadow:0 0 0 3px rgba(18,166,122,.22);}
.countdown{display:inline-flex;align-items:center;gap:8px;color:rgba(255,255,255,.72);}
.countdown b{color:#fff;font-weight:700;letter-spacing:.06em;}
@media (max-width:639px){
  .topbar{font-size:12px;}
  .countdown span{display:none;}
}

.site-header{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);backdrop-filter:saturate(1.2);
  transition:box-shadow .24s var(--ease),height .24s var(--ease);
}
.site-header.is-stuck{box-shadow:0 6px 24px -18px rgba(20,16,31,.5);}
.nav-inner{display:flex;align-items:center;gap:28px;height:var(--header-h);transition:height .24s var(--ease);}
.site-header.is-stuck .nav-inner{height:60px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none;}
.brand-mark{
  width:28px;height:28px;border-radius:9px;background:var(--brand-700);position:relative;flex:none;
  box-shadow:0 6px 14px -8px rgba(58,30,110,.9);
}
.brand-mark::before{
  content:"";position:absolute;left:8px;top:8px;width:12px;height:12px;
  background:var(--accent-500);border-radius:3px;transform:rotate(45deg);
}
.brand-text{font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--text);}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:8px;}
.main-nav a{
  position:relative;font-size:15px;font-weight:600;color:#4A4453;padding:6px 0;white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--accent-500);
  transition:right .24s var(--ease);
}
.main-nav a:hover{color:var(--text);}
.main-nav a:hover::after{right:0;}
.main-nav a.is-active{color:var(--text);}
.main-nav a.is-active::after{right:0;}
.nav-actions{display:flex;align-items:center;gap:16px;margin-left:auto;}
.hamburger{
  display:none;width:44px;height:44px;flex-direction:column;justify-content:center;align-items:center;gap:5px;
  border-radius:12px;
}
.hamburger span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:transform .22s var(--ease),opacity .22s var(--ease);}
.hamburger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.is-open span:nth-child(2){opacity:0;}
.hamburger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
@media (max-width:1023px){
  .main-nav,.nav-actions{display:none;}
  .hamburger{display:flex;}
  .nav-inner{gap:16px;}
}

/* ---------- Drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,16,31,.5);opacity:0;pointer-events:none;
  transition:opacity .24s var(--ease);z-index:90;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;top:0;right:0;width:280px;max-width:84vw;height:100%;background:#fff;z-index:100;
  transform:translateX(100%);transition:transform .26s var(--ease);
  display:flex;flex-direction:column;box-shadow:-12px 0 40px -24px rgba(20,16,31,.6);
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line);}
.drawer-head .brand-text{font-size:17px;}
.drawer-close{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--text-muted);}
.drawer-close:hover{background:var(--brand-050);color:var(--brand-700);}
.drawer-nav{flex:1;overflow-y:auto;padding:8px 0;}
.drawer-nav a{display:flex;align-items:center;height:56px;padding:0 20px;font-size:18px;font-weight:600;border-bottom:1px solid var(--line);}
.drawer-nav a:hover,.drawer-nav a.is-active{color:var(--accent-500);background:var(--paper);}
.drawer-foot{padding:16px 20px calc(16px + env(safe-area-inset-bottom));border-top:1px solid var(--line);}

/* ---------- Article layout ---------- */
.page-wrap{padding:36px 0 88px;}
@media (max-width:639px){.page-wrap{padding:24px 0 72px;}}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12px;color:var(--text-muted);margin-bottom:22px;letter-spacing:.01em;
}
.breadcrumb a{color:var(--text-muted);}
.breadcrumb a:hover{color:var(--accent-500);}
.breadcrumb .sep{color:#C7C1CD;}
.breadcrumb .current{
  color:var(--text);font-weight:600;max-width:360px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

.article-layout{display:block;}
@media (min-width:1200px){
  .article-layout{display:grid;grid-template-columns:minmax(0,760px) 220px;gap:56px;justify-content:center;align-items:start;}
}

.article-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:40px 44px 48px;box-shadow:var(--shadow-1);
}
@media (max-width:768px){.article-card{padding:26px 20px 34px;border-radius:var(--radius-md);}}

.article-title{
  font-size:clamp(26px,3.4vw,40px);line-height:1.24;font-weight:900;letter-spacing:-.02em;
  margin:6px 0 18px;color:var(--text);
}
@media (max-width:639px){.article-title{font-size:26px;}}

.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  font-size:13px;color:var(--text-muted);padding-bottom:22px;border-bottom:1px solid var(--line);
}
.pill{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:6px;
  background:var(--brand-050);color:var(--brand-700);font-size:12px;font-weight:700;letter-spacing:.02em;
}
.pill-accent{background:var(--accent-100);color:#B84A1C;}
.meta-sep{width:1px;height:12px;background:var(--line);display:inline-block;}

/* ---------- Article body ---------- */
.article-body{margin-top:32px;font-size:17px;line-height:1.85;color:#241F2E;word-break:break-word;}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  position:relative;font-size:24px;font-weight:800;line-height:1.4;letter-spacing:-.01em;
  margin:48px 0 16px;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:3px;border-radius:2px;background:var(--accent-500);
}
.article-body h3{font-size:20px;font-weight:700;line-height:1.5;margin:34px 0 12px;}
.article-body h4{font-size:17px;font-weight:700;margin:26px 0 10px;color:var(--brand-700);}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:24px;}
.article-body ul li{list-style:square;margin-bottom:.5em;}
.article-body ol li{list-style:decimal;margin-bottom:.5em;}
.article-body ul li::marker{color:var(--accent-500);}
.article-body ol li::marker{color:var(--brand-700);font-weight:700;font-family:var(--font-num);}
.article-body blockquote{
  margin:26px 0;padding:16px 20px;background:var(--brand-050);
  border-left:3px solid var(--brand-700);border-radius:0 12px 12px 0;color:#3B3452;font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body a{color:var(--brand-700);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
.article-body a:hover{color:var(--accent-500);}
.article-body img{border-radius:var(--radius-md);margin:26px auto;}
.article-body figure{margin:26px 0;}
.article-body figcaption{font-size:13px;color:var(--text-muted);text-align:center;margin-top:10px;}
.article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top;}
.article-body th{background:var(--brand-050);font-weight:700;color:#3B3452;}
.article-body tbody tr:nth-child(even){background:#FBF9F8;}
.article-body code{
  font-family:var(--font-num);font-size:14px;background:var(--brand-050);color:var(--brand-700);
  padding:2px 6px;border-radius:6px;
}
@media (max-width:639px){
  .article-body{font-size:16px;}
  .article-body h2{font-size:21px;margin-top:38px;}
  .article-body h3{font-size:18px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
}

.empty-state{
  padding:56px 24px;text-align:center;border:1px dashed #D6CFE6;border-radius:var(--radius-lg);background:#FCFBFE;
}
.empty-state .empty-icon{
  width:52px;height:52px;margin:0 auto 18px;border-radius:50%;border:1px solid #D6CFE6;
  display:flex;align-items:center;justify-content:center;color:var(--brand-700);font-size:20px;
}
.empty-title{font-size:19px;font-weight:800;margin-bottom:8px;}
.empty-desc{font-size:14px;color:var(--text-muted);margin-bottom:22px;}

/* ---------- Tags ---------- */
.article-tags{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:44px;padding-top:24px;border-top:1px solid var(--line);
}
.tag-label{font-size:13px;font-weight:700;color:var(--text-muted);letter-spacing:.06em;}
.chip{
  display:inline-flex;align-items:center;padding:6px 14px;border-radius:6px;
  background:var(--paper);border:1px solid var(--line);font-size:13px;font-weight:600;color:#4A4453;
  transition:all .2s var(--ease);
}
.chip:hover{background:var(--brand-050);border-color:#D6CFE6;color:var(--brand-700);transform:translateY(-1px);}

/* ---------- Prev / Next ---------- */
.postnav{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:32px;}
@media (max-width:768px){.postnav{grid-template-columns:1fr;}}
.postnav-card{
  display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:20px 22px;box-shadow:var(--shadow-1);transition:all .22s var(--ease);
}
.postnav-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#DCD5EA;}
.postnav-card .pn-label{font-size:12px;font-weight:700;color:var(--accent-500);letter-spacing:.08em;display:block;margin-bottom:8px;}
.postnav-card .pn-title{
  font-size:16px;font-weight:700;line-height:1.5;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.postnav-card:hover .pn-title{color:var(--accent-500);}
.postnav-card .pn-date{display:block;margin-top:10px;font-size:13px;color:var(--text-muted);}

/* ---------- Related ---------- */
.section-block{margin-top:72px;}
@media (max-width:639px){.section-block{margin-top:52px;}}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;}
.section-head h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;letter-spacing:-.01em;line-height:1.25;}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--accent-500);
  text-transform:uppercase;margin-bottom:10px;
}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
@media (max-width:1023px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:639px){.card-grid{grid-template-columns:1fr;gap:16px;}}
.news-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-1);transition:all .22s var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#DCD5EA;}
.news-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,var(--brand-700),#6B44B8);}
.news-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.news-card:hover .thumb img{transform:scale(1.04);}
.news-card .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-card .cat{align-self:flex-start;font-size:12px;font-weight:700;padding:4px 10px;border-radius:6px;background:var(--brand-050);color:var(--brand-700);}
.news-card h3{
  font-size:18px;font-weight:700;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card:hover h3{color:var(--accent-500);}
.news-card p{
  font-size:14px;color:var(--text-muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card .meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-muted);padding-top:12px;border-top:1px solid var(--line);}

/* ---------- Aside TOC ---------- */
.article-aside{display:none;}
@media (min-width:1200px){
  .article-aside{display:block;position:sticky;top:calc(var(--header-h) + 28px);}
}
.toc-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);padding:20px;box-shadow:var(--shadow-1);}
.toc-card h2{font-size:13px;font-weight:800;letter-spacing:.1em;color:var(--text-muted);margin-bottom:14px;}
.toc-list{display:flex;flex-direction:column;gap:2px;border-left:1px solid var(--line);}
.toc-list a{
  display:block;font-size:13px;line-height:1.5;color:var(--text-muted);padding:6px 0 6px 14px;
  border-left:2px solid transparent;margin-left:-1.5px;transition:all .2s var(--ease);
}
.toc-list a:hover{color:var(--brand-700);}
.toc-list a.is-current{color:var(--accent-500);border-left-color:var(--accent-500);font-weight:700;}
.toc-list a.lv3{padding-left:26px;font-size:12.5px;}

.toc-mobile{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:14px 18px;margin-bottom:20px;box-shadow:var(--shadow-1);
}
.toc-mobile summary{
  cursor:pointer;font-size:14px;font-weight:700;color:var(--text);list-style:none;
  display:flex;align-items:center;justify-content:space-between;
}
.toc-mobile summary::-webkit-details-marker{display:none;}
.toc-mobile summary::after{content:"＋";color:var(--accent-500);font-size:16px;font-weight:700;}
.toc-mobile[open] summary::after{content:"－";}
.toc-mobile .toc-list{margin-top:12px;border-left:1px solid var(--line);}
@media (min-width:1200px){.toc-mobile{display:none;}}

/* ---------- Back link ---------- */
.back-link{
  display:inline-flex;align-items:center;gap:8px;margin-top:36px;
  font-size:14px;font-weight:700;color:var(--brand-700);
}
.back-link:hover{color:var(--accent-500);}
.back-link::before{content:"←";transition:transform .2s var(--ease);}
.back-link:hover::before{transform:translateX(-4px);}

/* ---------- CTA strip ---------- */
.cta-strip{
  margin-top:72px;background:var(--ink-900);border-radius:20px;padding:56px 32px;text-align:center;color:#fff;
}
.cta-strip h2{font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.25;margin-bottom:12px;}
.cta-strip p{color:rgba(255,255,255,.72);font-size:16px;max-width:620px;margin:0 auto 26px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.74);padding:72px 0 28px;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
@media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px;}}
@media (max-width:639px){.footer-grid{grid-template-columns:1fr;gap:28px;}}
.footer-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{color:#fff;}
.footer-about{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:360px;}
.footer-tag{
  display:inline-flex;align-items:center;gap:8px;margin-top:18px;padding:6px 14px;border-radius:var(--pill);
  background:rgba(255,255,255,.08);font-size:12px;font-weight:700;color:rgba(255,255,255,.82);
}
.footer-col h4{font-size:14px;font-weight:800;color:#fff;margin-bottom:18px;letter-spacing:.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{color:rgba(255,255,255,.68);font-size:14px;}
.footer-col a:hover{color:var(--accent-500);}
.footer-col span{color:rgba(255,255,255,.56);font-size:14px;}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- Floating CTA & To top ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 22px;border-radius:var(--pill);background:var(--brand-700);color:#fff;
  font-size:14px;font-weight:700;box-shadow:0 14px 34px -14px rgba(58,30,110,.9);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:all .26s var(--ease);
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta:hover{background:var(--accent-500);color:#fff;transform:translateY(-2px);}
.float-cta .dot{background:var(--accent-500);}
.float-cta:hover .dot{background:#fff;}
@media (max-width:639px){
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;justify-content:center;height:64px;
    padding:0 16px calc(0px + env(safe-area-inset-bottom));
    transform:translateY(100%);box-shadow:0 -10px 30px -18px rgba(20,16,31,.7);
  }
  .float-cta.is-visible{transform:translateY(0);}
}
.to-top{
  position:fixed;left:24px;bottom:24px;z-index:70;width:46px;height:46px;border-radius:50%;
  background:#fff;border:1px solid var(--line);color:var(--brand-700);font-size:17px;
  display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-1);
  opacity:0;transform:translateY(10px);pointer-events:none;transition:all .24s var(--ease);
}
.to-top.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.to-top:hover{background:var(--brand-700);color:#fff;border-color:var(--brand-700);}
@media (max-width:639px){
  .to-top{left:16px;bottom:calc(80px + env(safe-area-inset-bottom));width:44px;height:44px;}
}

/* ---------- Motion ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category1 */
:root{
  --ink-900:#14101F;
  --brand-700:#3A1E6E;
  --brand-600:#4C2A8C;
  --brand-050:#F1ECFA;
  --accent-500:#FF7A45;
  --accent-100:#FFE9DF;
  --paper:#F7F5F2;
  --surface:#FFFFFF;
  --line:#E6E1DC;
  --text:#17131F;
  --text-muted:#6E6877;
  --ok:#12A67A;
  --warn:#E8A33D;
  --radius-card:16px;
  --radius-sm:10px;
  --radius-img:14px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(20,16,31,.06),0 8px 24px -12px rgba(20,16,31,.14);
  --shadow-2:0 2px 6px rgba(20,16,31,.08),0 18px 42px -18px rgba(20,16,31,.24);
  --ease:cubic-bezier(.2,.7,.2,1);
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand-700);text-decoration:none;transition:color .22s var(--ease);}
a:hover{color:var(--accent-500);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:800;letter-spacing:-.01em;line-height:1.25;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--brand-700);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.grid-gutter{margin-left:-12px;margin-right:-12px;}
.grid-gutter>.cell{padding-left:12px;padding-right:12px;}

/* ---------- 顶部状态条 ---------- */
.topbar{background:var(--ink-900);color:rgba(255,255,255,.78);font-size:13px;}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:36px;flex-wrap:nowrap;}
.status-tag{display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:700;letter-spacing:.06em;color:#fff;background:rgba(255,255,255,.1);padding:4px 10px;border-radius:6px;white-space:nowrap;}
.dot{width:6px;height:6px;border-radius:50%;background:var(--ok);display:inline-block;flex:0 0 auto;}
.countdown-wrap{display:inline-flex;align-items:center;gap:8px;white-space:nowrap;color:rgba(255,255,255,.7);}
.countdown{color:var(--accent-500);font-weight:700;letter-spacing:.02em;}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);}
.nav-inner{display:flex;align-items:center;gap:28px;height:70px;transition:height .22s var(--ease);}
.site-header.is-scrolled .nav-inner{height:62px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--text);}
.brand:hover{color:var(--text);}
.brand-mark{
  width:28px;height:28px;border-radius:8px;background:var(--brand-700);
  position:relative;flex:0 0 auto;display:inline-block;
}
.brand-mark::after{
  content:"";position:absolute;right:5px;bottom:5px;width:9px;height:9px;
  background:var(--accent-500);border-radius:2px;
}
.brand-text{font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--ink-900);}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto;}
.main-nav a{
  position:relative;font-size:14px;font-weight:600;color:var(--text-muted);
  padding:8px 0;min-height:44px;display:inline-flex;align-items:center;
}
.main-nav a::after{
  content:"";position:absolute;left:0;bottom:6px;width:0;height:2px;
  background:var(--accent-500);border-radius:2px;transition:width .22s var(--ease);
}
.main-nav a:hover{color:var(--text);}
.main-nav a:hover::after{width:100%;}
.main-nav a.is-active{color:var(--text);font-weight:700;}
.main-nav a.is-active::after{width:100%;}
.nav-actions{display:flex;align-items:center;gap:16px;flex:0 0 auto;}
.link-plain{
  font-size:14px;font-weight:700;color:var(--brand-700);
  border-bottom:1px solid transparent;padding:4px 0;
}
.link-plain:hover{color:var(--accent-500);border-bottom-color:var(--accent-500);}
.hamburger{
  display:none;width:44px;height:44px;border:0;background:transparent;
  padding:10px;margin-left:auto;cursor:pointer;flex-direction:column;justify-content:center;
  gap:5px;border-radius:10px;
}
.hamburger span{display:block;height:2px;width:24px;background:var(--ink-900);border-radius:2px;transition:transform .22s var(--ease),opacity .22s var(--ease);}
.hamburger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.is-open span:nth-child(2){opacity:0;}
.hamburger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- 抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,16,31,.5);opacity:0;visibility:hidden;
  transition:opacity .22s var(--ease),visibility .22s var(--ease);z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:280px;max-width:86vw;
  background:var(--surface);z-index:80;transform:translateX(100%);
  transition:transform .24s var(--ease);display:flex;flex-direction:column;
  box-shadow:var(--shadow-2);
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line);}
.drawer-head .brand-text{font-size:16px;}
.drawer-close{width:44px;height:44px;border:0;background:transparent;font-size:18px;color:var(--text-muted);cursor:pointer;border-radius:10px;}
.drawer-nav{display:flex;flex-direction:column;padding:8px 0;overflow-y:auto;}
.drawer-nav a{
  display:flex;align-items:center;min-height:56px;padding:0 20px;font-size:18px;
  font-weight:600;color:var(--text);border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--brand-700);}
.drawer-foot{margin-top:auto;padding:20px;border-top:1px solid var(--line);}
.drawer-foot .btn{width:100%;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:700;border:1px solid transparent;cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
  text-align:center;white-space:nowrap;
}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;}
.btn-primary{background:var(--brand-700);color:#fff;}
.btn-primary:hover{background:var(--accent-500);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn-outline{background:transparent;border-color:var(--line);color:var(--text);}
.btn-outline:hover{border-color:var(--brand-700);color:var(--brand-700);background:var(--brand-050);}
.btn-onDark{background:var(--accent-500);color:#1A1226;}
.btn-onDark:hover{background:#fff;color:var(--ink-900);transform:translateY(-1px);}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.4);color:#fff;}
.btn-outline-light:hover{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.7);}

/* ---------- 页面横幅 ---------- */
.page-hero{
  position:relative;color:#fff;padding:64px 0 72px;overflow:hidden;
  background-image:linear-gradient(100deg,rgba(58,30,110,.9) 0%,rgba(20,16,31,.86) 78%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  background-color:var(--ink-900);
}
.page-hero::after{
  content:"";position:absolute;right:-60px;bottom:-60px;width:260px;height:260px;
  border:1px solid rgba(255,255,255,.14);border-radius:50%;pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.crumb{font-size:12px;color:rgba(255,255,255,.66);margin-bottom:26px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.crumb a{color:rgba(255,255,255,.72);}
.crumb a:hover{color:var(--accent-500);}
.crumb .sep{color:rgba(255,255,255,.36);}
.crumb .now{color:rgba(255,255,255,.92);}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;
  letter-spacing:.14em;color:#fff;background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.18);padding:6px 12px;border-radius:6px;margin-bottom:20px;
}
.page-hero h1{
  color:#fff;font-size:clamp(32px,4.6vw,56px);line-height:1.08;font-weight:900;
  letter-spacing:-.02em;max-width:16em;
}
.hero-lead{
  margin-top:20px;font-size:clamp(16px,1.5vw,18px);line-height:1.8;
  color:rgba(255,255,255,.78);max-width:660px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-points{display:flex;flex-wrap:wrap;gap:12px 32px;margin-top:36px;}
.hero-points li{
  display:flex;align-items:center;gap:10px;font-size:14px;color:rgba(255,255,255,.8);
}
.hero-points li::before{
  content:"";width:3px;height:14px;background:var(--accent-500);border-radius:2px;flex:0 0 auto;
}

/* ---------- 通用板块 ---------- */
.section{padding:100px 0;scroll-margin-top:96px;}
.section--tight{padding:72px 0;}
.section--white{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:720px;margin-bottom:44px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;
  letter-spacing:.14em;color:var(--brand-700);background:var(--brand-050);
  padding:6px 12px;border-radius:6px;
}
.section-title{font-size:clamp(26px,3.2vw,40px);line-height:1.2;font-weight:800;margin:16px 0 14px;}
.section-lead{font-size:16px;line-height:1.85;color:var(--text-muted);max-width:640px;}
.sec-num{
  font-size:clamp(34px,4vw,52px);font-weight:900;line-height:1;letter-spacing:-.02em;
  color:transparent;-webkit-text-stroke:1.5px rgba(58,30,110,.22);font-variant-numeric:tabular-nums;
}
.bar-title{
  display:flex;align-items:center;gap:12px;font-size:20px;font-weight:700;margin-bottom:12px;
}
.bar-title::before{
  content:"";width:3px;height:18px;background:var(--accent-500);border-radius:2px;flex:0 0 auto;
}
.head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}

/* ---------- 信息卡 ---------- */
.info-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px;height:100%;display:flex;flex-direction:column;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#DCD3EC;}
.icon-badge{
  width:46px;height:46px;border-radius:12px;background:var(--brand-050);color:var(--brand-700);
  display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:18px;
}
.info-card h3{font-size:20px;font-weight:700;margin-bottom:10px;}
.info-card p{font-size:15px;line-height:1.8;color:var(--text-muted);}
.card-link{
  margin-top:18px;font-size:14px;font-weight:700;color:var(--brand-700);
  display:inline-flex;align-items:center;gap:8px;
}
.card-link i{font-size:12px;transition:transform .22s var(--ease);}
.card-link:hover i{transform:translateX(4px);}
.card-figure{margin-top:20px;border-radius:var(--radius-img);overflow:hidden;aspect-ratio:16/9;background:var(--brand-050);}
.card-figure img{width:100%;height:100%;object-fit:cover;}

/* ---------- 步骤 ---------- */
.step{padding-top:22px;border-top:1px solid var(--line);height:100%;}
.step-num{
  font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--accent-500);
  font-variant-numeric:tabular-nums;
}
.step h3{font-size:19px;font-weight:700;margin:12px 0 8px;}
.step p{font-size:15px;line-height:1.8;color:var(--text-muted);}

/* ---------- 数据带 ---------- */
.data-band{
  background:var(--brand-050);border-radius:var(--radius-card);
  padding:40px 32px;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
  border:1px solid rgba(58,30,110,.08);
}
.data-item{position:relative;text-align:center;padding:6px 8px;}
.data-item + .data-item::before{
  content:"";position:absolute;left:0;top:14%;height:72%;width:1px;background:rgba(58,30,110,.16);
}
.data-num{
  font-size:clamp(32px,3.6vw,46px);font-weight:900;line-height:1.1;
  color:var(--brand-700);letter-spacing:-.02em;font-variant-numeric:tabular-nums;
}
.data-label{font-size:13px;color:var(--text-muted);margin-top:8px;letter-spacing:.04em;}

/* ---------- 场景 ---------- */
.scene-figure{
  border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line);
  aspect-ratio:16/10;background:var(--brand-050);box-shadow:var(--shadow-1);
}
.scene-figure img{width:100%;height:100%;object-fit:cover;}
.scene-list li{
  display:flex;gap:14px;padding:18px 0;border-bottom:1px solid var(--line);
  font-size:15px;line-height:1.8;color:var(--text-muted);
}
.scene-list li:first-child{padding-top:0;}
.scene-list li:last-child{border-bottom:0;padding-bottom:0;}
.scene-list .mark{
  flex:0 0 auto;width:8px;height:8px;background:var(--accent-500);border-radius:2px;margin-top:10px;
}
.scene-list strong{color:var(--text);font-weight:700;display:block;font-size:16px;margin-bottom:4px;}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:none;border:0;padding:22px 0;font-size:16px;font-weight:700;color:var(--text);
  text-align:left;cursor:pointer;min-height:56px;transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--accent-500);}
.faq-q i{color:var(--brand-700);font-size:14px;flex:0 0 auto;transition:transform .22s var(--ease),color .2s var(--ease);}
.faq-q:hover i{color:var(--accent-500);}
.faq-item.is-open .faq-q i{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease);}
.faq-a p{
  padding:0 44px 22px 0;font-size:15.5px;line-height:1.85;color:var(--text-muted);max-width:820px;
}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--ink-900);border-radius:24px;padding:68px 40px;text-align:center;color:#fff;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;left:-80px;top:-80px;width:240px;height:240px;
  border:1px solid rgba(255,255,255,.08);border-radius:50%;
}
.cta-band h2{
  color:#fff;font-size:clamp(26px,3.2vw,38px);font-weight:800;line-height:1.25;margin-bottom:14px;
  position:relative;z-index:2;
}
.cta-band p{
  color:rgba(255,255,255,.72);font-size:16px;line-height:1.8;max-width:600px;margin:0 auto;
  position:relative;z-index:2;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:34px;position:relative;z-index:2;}

/* ---------- 相关分类 ---------- */
.related-card{
  display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px;height:100%;color:var(--text);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#DCD3EC;color:var(--text);}
.related-card .rc-tag{
  display:inline-block;font-size:12px;font-weight:700;color:var(--brand-700);
  background:var(--brand-050);padding:4px 10px;border-radius:6px;margin-bottom:14px;
}
.related-card h3{font-size:18px;font-weight:700;margin-bottom:8px;position:relative;display:inline-block;}
.related-card h3::after{
  content:"";position:absolute;left:0;bottom:-4px;height:2px;width:0;background:var(--accent-500);
  transition:width .24s var(--ease);
}
.related-card:hover h3::after{width:100%;}
.related-card p{font-size:14.5px;line-height:1.8;color:var(--text-muted);}

/* ---------- 浮动 CTA / 返回顶部 ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:55;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:none;}
.float-cta a{
  display:inline-flex;align-items:center;gap:10px;min-height:48px;padding:0 22px;
  background:var(--brand-700);color:#fff;border-radius:var(--radius-pill);
  font-size:14px;font-weight:700;box-shadow:var(--shadow-2);white-space:nowrap;
}
.float-cta a:hover{background:var(--accent-500);color:#fff;}
.fc-dot{width:6px;height:6px;border-radius:50%;background:var(--accent-500);flex:0 0 auto;}
.float-cta a:hover .fc-dot{background:#fff;}
.back-top{
  position:fixed;right:24px;bottom:88px;z-index:55;width:44px;height:44px;border-radius:50%;
  background:var(--surface);border:1px solid var(--line);color:var(--brand-700);
  display:flex;align-items:center;justify-content:center;font-size:14px;box-shadow:var(--shadow-1);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.back-top.is-visible{opacity:1;visibility:visible;transform:none;}
.back-top:hover{color:var(--accent-500);border-color:var(--accent-500);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.7);padding:68px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:18px;}
.footer-brand .brand-text{color:#fff;font-size:17px;font-weight:800;}
.footer-brand .brand-mark{background:var(--brand-600);}
.footer-about{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:340px;}
.footer-tag{
  display:inline-flex;align-items:center;gap:7px;margin-top:18px;font-size:12px;font-weight:700;
  color:#fff;background:rgba(255,255,255,.1);padding:5px 11px;border-radius:6px;
}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:18px;letter-spacing:.02em;}
.footer-col li{margin-bottom:11px;font-size:14px;line-height:1.7;}
.footer-col a{color:rgba(255,255,255,.72);}
.footer-col a:hover{color:var(--accent-500);}
.footer-col span{color:rgba(255,255,255,.6);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);margin-top:44px;padding-top:22px;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 动效 ---------- */
.js-on .reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.js-on .reveal.reveal-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .main-nav,.nav-actions{display:none;}
  .hamburger{display:flex;}
  .section{padding:76px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .grid-gutter{margin-left:-8px;margin-right:-8px;}
  .grid-gutter>.cell{padding-left:8px;padding-right:8px;}
  .topbar{font-size:12px;}
  .topbar-inner{height:34px;gap:10px;}
  .countdown-wrap{font-size:11.5px;gap:6px;}
  .status-tag{font-size:11px;padding:3px 8px;}
  .nav-inner{height:62px;}
  .brand-text{font-size:16px;}
  .page-hero{padding:44px 0 56px;}
  .hero-actions{gap:10px;}
  .hero-actions .btn{flex:1 1 auto;}
  .hero-points{gap:10px 20px;margin-top:28px;}
  .section{padding:60px 0;}
  .section--tight{padding:48px 0;}
  .section-head{margin-bottom:32px;}
  .data-band{grid-template-columns:1fr;padding:28px 22px;gap:6px;}
  .data-item + .data-item::before{left:12%;right:12%;top:0;height:1px;width:auto;}
  .data-item{padding:18px 8px;}
  .cta-band{padding:48px 22px;border-radius:18px;}
  .cta-actions .btn{width:100%;}
  .float-cta{
    left:0;right:0;bottom:0;transform:translateY(100%);
  }
  .float-cta.is-visible{transform:translateY(0);}
  .float-cta a{
    width:100%;border-radius:0;justify-content:center;min-height:64px;
    padding:0 16px calc(env(safe-area-inset-bottom,0px)) 16px;
  }
  .back-top{
    left:16px;right:auto;bottom:calc(80px + env(safe-area-inset-bottom,0px));
    width:44px;height:44px;
  }
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;gap:6px;}
  .faq-a p{padding-right:0;}
}
@media (min-width:1440px){
  .section{padding:112px 0;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation:none!important;transition:none!important;}
  .js-on .reveal{opacity:1;transform:none;}
}

/* roulang page: category2 */
/* ============ 设计变量 ============ */
:root{
  --ink-900:#14101F;
  --brand-700:#3A1E6E;
  --brand-600:#4C2A8C;
  --brand-050:#F1ECFA;
  --accent-500:#FF7A45;
  --accent-100:#FFE9DF;
  --paper:#F7F5F2;
  --surface:#FFFFFF;
  --line:#E6E1DC;
  --text:#17131F;
  --text-muted:#6E6877;
  --ok:#12A67A;
  --warn:#E8A33D;

  --r-card:16px;
  --r-img:14px;
  --r-badge:6px;
  --r-btn:999px;
  --r-input:10px;

  --sh-1:0 1px 2px rgba(20,16,31,.06), 0 8px 24px -12px rgba(20,16,31,.14);
  --sh-2:0 1px 2px rgba(20,16,31,.08), 0 18px 40px -18px rgba(20,16,31,.22);

  --ease:cubic-bezier(.2,.7,.2,1);
  --top-h:32px;
  --nav-h:68px;
  --font:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --font-num:"Inter","Helvetica Neue",Arial,"PingFang SC",sans-serif;
}

/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.75;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-700);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--accent-500)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;color:var(--text);letter-spacing:-.01em;line-height:1.25}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
time,.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--brand-700);outline-offset:3px;border-radius:4px}
::selection{background:var(--accent-100);color:var(--ink-900)}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
main{display:block}
section{scroll-margin-top:calc(var(--top-h) + var(--nav-h) + 54px)}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--brand-700);
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent-500);display:inline-block}

.section-title{font-size:clamp(26px,3.2vw,40px);font-weight:800;line-height:1.2}
.section-lead{color:var(--text-muted);font-size:16px;margin-top:14px;max-width:62ch}
.rule{height:1px;background:var(--line);border:0;margin:0}
.kw{border-bottom:1px solid var(--accent-500);font-weight:700;color:var(--text)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--brand-700);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--accent-500);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--brand-700);border-color:var(--brand-700)}
.btn-ghost:hover{background:var(--brand-700);color:#fff}
.btn-light{background:#fff;color:var(--brand-700)}
.btn-light:hover{background:var(--accent-500);color:#fff}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-outline-light:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff}
.btn-sm{min-height:40px;padding:0 20px;font-size:14px}
.link-plain{font-size:14px;font-weight:600;color:var(--text-muted)}
.link-plain:hover{color:var(--accent-500)}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--brand-700)}
.text-link i{font-size:12px;transition:transform .2s var(--ease)}
.text-link:hover i{transform:translateX(4px)}

/* ============ 顶部状态条 ============ */
.topbar{background:var(--ink-900);color:rgba(255,255,255,.82);height:var(--top-h);display:flex;align-items:center;position:relative;z-index:60}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar-status{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.06em;white-space:nowrap}
.topbar-status .dot{width:6px;height:6px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 3px rgba(18,166,122,.22)}
.topbar-count{font-size:12px;letter-spacing:.06em;color:rgba(255,255,255,.72);white-space:nowrap}
.topbar-count b{color:#fff;font-weight:700}

/* ============ 主导航 ============ */
.site-header{
  position:sticky;top:0;z-index:70;background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s var(--ease);
}
.site-header.is-stuck{box-shadow:var(--sh-1)}
.nav-inner{display:flex;align-items:center;gap:24px;height:var(--nav-h);transition:height .24s var(--ease)}
.site-header.is-stuck .nav-inner{height:60px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:28px;height:28px;border-radius:8px;background:var(--brand-700);position:relative;display:inline-block;flex:0 0 auto;
}
.brand-mark::after{
  content:"";position:absolute;inset:8px 8px 8px 8px;background:var(--accent-500);
  border-radius:3px 8px 3px 8px;transform:rotate(12deg);
}
.brand-text{font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--ink-900)}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px;flex:1 1 auto}
.main-nav a{
  position:relative;padding:10px 14px;font-size:15px;font-weight:600;color:var(--text-muted);
  border-radius:8px;line-height:1;
}
.main-nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--accent-500);
  transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease);
}
.main-nav a:hover{color:var(--text)}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a.is-active{color:var(--text);font-weight:700}
.main-nav a.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:16px;flex:0 0 auto}
.hamburger{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:10px;
  cursor:pointer;padding:0;position:relative;flex:0 0 auto;
}
.hamburger span{
  position:absolute;left:12px;right:12px;height:2px;background:var(--ink-900);border-radius:2px;
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.hamburger span:nth-child(1){top:15px}
.hamburger span:nth-child(2){top:21px}
.hamburger span:nth-child(3){top:27px}
.hamburger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.hamburger.is-open span:nth-child(2){opacity:0}
.hamburger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* 锚点条 */
.anchorbar{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:var(--nav-h);z-index:65}
.site-header.is-stuck ~ .anchorbar{top:60px}
.anchorbar .container{display:flex;align-items:center;gap:10px;height:54px;overflow-x:auto;scrollbar-width:none}
.anchorbar .container::-webkit-scrollbar{display:none}
.anchorbar a{
  flex:0 0 auto;padding:8px 16px;border-radius:var(--r-btn);font-size:14px;font-weight:600;
  color:var(--text-muted);background:var(--paper);border:1px solid var(--line);white-space:nowrap;line-height:1;
}
.anchorbar a:hover{color:var(--brand-700);border-color:var(--brand-050);background:var(--brand-050)}
.anchorbar a.is-active{background:var(--accent-500);border-color:var(--accent-500);color:#fff}

/* 抽屉 */
.drawer-overlay{position:fixed;inset:0;background:rgba(20,16,31,.5);opacity:0;visibility:hidden;transition:opacity .22s var(--ease),visibility .22s var(--ease);z-index:90}
.drawer-overlay.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:280px;max-width:86vw;background:#fff;z-index:95;
  transform:translateX(100%);transition:transform .24s var(--ease);display:flex;flex-direction:column;
  box-shadow:var(--sh-2);
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line)}
.drawer-close{width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;font-size:16px;cursor:pointer;color:var(--ink-900)}
.drawer-nav{flex:1 1 auto;overflow-y:auto;padding:8px 0}
.drawer-nav a{display:flex;align-items:center;height:56px;padding:0 20px;font-size:18px;font-weight:600;color:var(--text);border-bottom:1px solid var(--line)}
.drawer-nav a.is-active{color:var(--accent-500)}
.drawer-foot{padding:16px 20px;border-top:1px solid var(--line)}
.drawer-foot .btn{width:100%}
body.no-scroll{overflow:hidden}

/* ============ 面包屑 ============ */
.crumb{font-size:12px;color:var(--text-muted);display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.crumb a{color:var(--text-muted)}
.crumb a:hover{color:var(--accent-500)}
.crumb span.sep{opacity:.55}
.crumb .current{color:var(--text);font-weight:600}

/* ============ 分类页横幅 ============ */
.page-hero{
  position:relative;background-color:var(--ink-900);
  background-image:linear-gradient(105deg,rgba(58,30,110,.92) 0%,rgba(58,30,110,.72) 48%,rgba(20,16,31,.62) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  color:#fff;padding:56px 0 64px;
}
.page-hero .crumb, .page-hero .crumb a, .page-hero .crumb .current{color:rgba(255,255,255,.78)}
.page-hero .crumb a:hover{color:#fff}
.page-hero h1{color:#fff;font-size:clamp(34px,5.2vw,72px);line-height:1.06;font-weight:900;letter-spacing:-.02em;margin:18px 0 0;max-width:16ch}
.page-hero .lead{color:rgba(255,255,255,.85);font-size:17px;line-height:1.8;max-width:64ch;margin-top:18px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 28px;margin-top:24px}
.hero-points span{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.86)}
.hero-points span::before{content:"";width:3px;height:14px;background:var(--accent-500);border-radius:2px;display:inline-block}

/* ============ 数据带 ============ */
.stat-band{background:var(--surface);border-bottom:1px solid var(--line)}
.stat-band .container{display:flex;flex-wrap:wrap;gap:0}
.stat-item{flex:1 1 200px;padding:24px 0;border-right:1px solid var(--line)}
.stat-item:last-child{border-right:0}
.stat-item .n{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:34px;font-weight:800;color:var(--brand-700);line-height:1.1}
.stat-item .l{font-size:13px;color:var(--text-muted);margin-top:6px}

/* ============ 主栅格：左目录 + 右内容 ============ */
.layout{padding:72px 0 0}
.toc{position:sticky;top:calc(var(--top-h) + 130px)}
.toc-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--sh-1)}
.toc-card h2{font-size:13px;letter-spacing:.14em;font-weight:700;color:var(--text-muted);text-transform:uppercase;margin-bottom:12px}
.toc-list a{
  display:block;padding:9px 12px;border-left:3px solid transparent;font-size:14px;font-weight:600;
  color:var(--text-muted);border-radius:0 8px 8px 0;
}
.toc-list a:hover{background:var(--brand-050);color:var(--brand-700)}
.toc-list a.is-active{border-left-color:var(--accent-500);background:var(--brand-050);color:var(--brand-700)}
.toc-note{font-size:12px;color:var(--text-muted);margin-top:14px;padding-top:14px;border-top:1px solid var(--line);line-height:1.7}

.content-block{margin-bottom:72px}
.block-head{display:flex;gap:18px;align-items:flex-start;margin-bottom:26px}
.block-num{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:44px;font-weight:800;line-height:.9;
  color:var(--surface);-webkit-text-stroke:1.4px var(--brand-050);flex:0 0 auto;
}
.block-head h2{font-size:clamp(24px,2.6vw,32px);line-height:1.22}
.block-head p{color:var(--text-muted);font-size:15px;margin-top:10px;max-width:60ch}

.mini-title{position:relative;padding-left:14px;font-size:20px;font-weight:700;line-height:1.4}
.mini-title::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:3px;background:var(--accent-500);border-radius:2px}

/* 机制行列表 */
.mech-list{border-top:1px solid var(--line)}
.mech-item{
  display:flex;gap:22px;padding:22px 8px;border-bottom:1px solid var(--line);
  transition:transform .22s var(--ease),background-color .22s var(--ease);
}
.mech-item:hover{transform:translateX(4px);background:rgba(241,236,250,.45)}
.mech-item .idx{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:14px;font-weight:700;color:var(--text-muted);padding-top:4px;flex:0 0 34px}
.mech-item h3{font-size:20px;font-weight:700;transition:color .2s var(--ease)}
.mech-item:hover h3{color:var(--accent-500)}
.mech-item p{color:var(--text-muted);font-size:15.5px;margin-top:8px;max-width:70ch}
.mech-item .text-link{margin-top:10px}

/* 图文交替 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center}
.split .figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-img);border:1px solid var(--line)}
.split figcaption{font-size:13px;color:var(--text-muted);margin-top:10px}
.split h3{font-size:23px;margin:12px 0 14px}
.split p{color:var(--text-muted);font-size:16px;margin-bottom:12px}
.split .btn{margin-top:10px}
.split.reverse .figure{order:2}
.split.reverse .body{order:1}

/* 引用块 */
.quote{
  background:var(--brand-050);border-left:3px solid var(--brand-700);border-radius:0 var(--r-card) var(--r-card) 0;
  padding:20px 24px;margin:30px 0;
}
.quote p{font-size:16px;color:var(--text);line-height:1.8}
.quote cite{display:block;margin-top:10px;font-size:13px;font-style:normal;color:var(--text-muted)}

/* 对比表 */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-card);background:var(--surface);box-shadow:var(--sh-1)}
table.compare{width:100%;border-collapse:collapse;min-width:720px;font-size:15px}
table.compare caption{text-align:left;padding:18px 20px 0;font-size:13px;color:var(--text-muted)}
table.compare th,table.compare td{padding:14px 20px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
table.compare thead th{background:var(--brand-050);color:var(--brand-700);font-size:13px;font-weight:700;letter-spacing:.04em;white-space:nowrap}
table.compare tbody tr:nth-child(even){background:#FBFAF8}
table.compare tbody tr:last-child th,table.compare tbody tr:last-child td{border-bottom:0}
table.compare th:first-child{font-weight:700;color:var(--text)}

/* 结论 + CTA */
.conclusion{
  border-top:1px solid var(--line);padding-top:26px;display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;
}
.conclusion p{font-size:14px;color:var(--text-muted);max-width:62ch}

/* ============ 全宽 CTA ============ */
.cta-band{background:var(--ink-900);color:#fff;padding:80px 0;margin-top:36px}
.cta-band .inner{max-width:760px;margin:0 auto;text-align:center}
.cta-band h2{color:#fff;font-size:clamp(26px,3.2vw,40px);line-height:1.2}
.cta-band p{color:rgba(255,255,255,.76);font-size:16px;margin-top:16px}
.cta-band .actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:30px}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 44px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;background:none;border:0;padding:22px 0;display:flex;align-items:flex-start;justify-content:space-between;gap:18px;
  cursor:pointer;text-align:left;font-size:17px;font-weight:700;color:var(--text);line-height:1.6;min-height:44px;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--accent-500)}
.faq-q .ico{
  flex:0 0 26px;height:26px;border-radius:50%;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;
  font-size:13px;color:var(--brand-700);transition:transform .22s var(--ease),background-color .22s var(--ease),color .22s var(--ease);
}
.faq-item.is-open .faq-q .ico{transform:rotate(180deg);background:var(--brand-700);color:#fff;border-color:var(--brand-700)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease)}
.faq-a p{padding:0 34px 22px 0;font-size:15.5px;line-height:1.8;color:var(--text-muted)}

/* ============ 相关分类 ============ */
.related{padding:72px 0 0}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:26px}
.related-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;
  box-shadow:var(--sh-1);transition:transform .22s var(--ease),box-shadow .22s var(--ease);
  display:block;
}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);color:inherit}
.related-card .tag{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.04em;padding:5px 10px;border-radius:var(--r-badge);
  background:var(--brand-050);color:var(--brand-700);
}
.related-card h3{font-size:18px;margin:14px 0 8px;transition:color .2s var(--ease)}
.related-card:hover h3{color:var(--accent-500)}
.related-card p{font-size:14px;color:var(--text-muted)}

/* ============ 浮动 CTA / 返回顶部 ============ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:80;display:inline-flex;align-items:center;gap:10px;
  background:var(--brand-700);color:#fff;padding:14px 22px;border-radius:var(--r-btn);
  font-size:14px;font-weight:700;box-shadow:var(--sh-2);opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease),background-color .2s var(--ease);
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:var(--accent-500);color:#fff}
.float-cta .dot{width:6px;height:6px;border-radius:50%;background:var(--accent-500);box-shadow:0 0 0 3px rgba(255,122,69,.3)}
.float-cta:hover .dot{background:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.3)}
.to-top{
  position:fixed;left:24px;bottom:24px;width:48px;height:48px;border-radius:50%;background:#fff;border:1px solid var(--line);
  color:var(--brand-700);box-shadow:var(--sh-1);cursor:pointer;z-index:79;opacity:0;visibility:hidden;
  transition:opacity .24s var(--ease),visibility .24s var(--ease),transform .2s var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible}
.to-top:hover{transform:translateY(-3px);background:var(--brand-050)}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);padding:72px 0 0;margin-top:88px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-text{color:#fff}
.footer-brand .brand-mark{background:#fff}
.footer-brand .brand-mark::after{background:var(--accent-500)}
.footer-about{font-size:14px;line-height:1.8;max-width:38ch}
.footer-tag{
  display:inline-flex;align-items:center;gap:8px;margin-top:18px;padding:6px 12px;border-radius:var(--r-badge);
  background:rgba(255,255,255,.08);font-size:12px;font-weight:700;color:rgba(255,255,255,.86);
}
.footer-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--ok);display:inline-block}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;letter-spacing:.06em;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col a,.footer-col span{font-size:14px;color:rgba(255,255,255,.72)}
.footer-col a:hover{color:var(--accent-500)}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.12);padding:22px 0;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.6);
}

/* ============ 进入视口淡入 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .main-nav,.nav-actions{display:none}
  .hamburger{display:inline-block}
  .nav-inner{justify-content:space-between}
  .anchorbar{top:var(--nav-h)}
  .toc{position:static;margin-bottom:32px}
  .layout{padding-top:48px}
  .content-block{margin-bottom:56px}
  .split{grid-template-columns:1fr;gap:22px}
  .split.reverse .figure{order:1}
  .split.reverse .body{order:2}
  .faq-grid{grid-template-columns:1fr;gap:0}
  .related-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .stat-item{flex:1 1 45%;border-right:0;border-bottom:1px solid var(--line)}
}
@media (max-width:639px){
  body{font-size:16px}
  .container{padding:0 16px}
  .page-hero{padding:36px 0 44px}
  .page-hero .lead{font-size:16px}
  .hero-actions .btn{width:100%}
  .layout{padding-top:36px}
  .content-block{margin-bottom:48px}
  .block-num{font-size:34px}
  .mech-item{gap:14px;padding:18px 0}
  .related-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .site-footer{padding-top:52px;margin-top:56px}
  .cta-band{padding:56px 0}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;justify-content:center;padding:0 16px;height:64px;
    padding-bottom:env(safe-area-inset-bottom);
  }
  .to-top{left:16px;bottom:calc(76px + env(safe-area-inset-bottom));width:44px;height:44px}
  .stat-item{flex:1 1 100%}
}
@media (min-width:1440px){
  .container{padding:0 32px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

/* roulang page: category3 */
:root{
  --ink-900:#14101F;
  --brand-700:#3A1E6E;
  --brand-600:#4C2A8C;
  --brand-050:#F1ECFA;
  --accent-500:#FF7A45;
  --accent-100:#FFE9DF;
  --paper:#F7F5F2;
  --surface:#FFFFFF;
  --line:#E6E1DC;
  --text:#17131F;
  --text-muted:#6E6877;
  --ok:#12A67A;
  --warn:#E8A33D;
  --radius-card:16px;
  --radius-img:14px;
  --radius-btn:999px;
  --shadow-1:0 1px 2px rgba(20,16,31,.06),0 8px 24px -12px rgba(20,16,31,.14);
  --shadow-2:0 2px 4px rgba(20,16,31,.08),0 16px 38px -14px rgba(20,16,31,.22);
  --ease:cubic-bezier(.2,.7,.2,1);
  --nav-h:68px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-num:"SF Mono","JetBrains Mono","Roboto Mono",ui-monospace,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-700);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--accent-500);}
button{font:inherit;}
h1,h2,h3,h4{margin:0;color:var(--text);font-family:var(--font-cn);line-height:1.2;font-weight:800;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:3px;border-radius:6px;}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* Foundation 栅格定制 */
.grid-padding-x{margin-left:-12px;margin-right:-12px;}
.grid-padding-x > .cell{padding-left:12px;padding-right:12px;}
.grid-padding-y{margin-top:-12px;margin-bottom:-12px;}
.grid-padding-y > .cell{padding-top:12px;padding-bottom:12px;}

/* 顶部状态条 */
.topbar{
  background:var(--ink-900);
  color:#EDE9F5;
  font-size:13px;
  height:32px;
  display:flex;
  align-items:center;
}
.topbar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.status-pill{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-weight:700;
  letter-spacing:.02em;
  white-space:nowrap;
}
.dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--accent-500);
  display:inline-block;
  flex:0 0 6px;
  box-shadow:0 0 0 3px rgba(255,122,69,.18);
}
.countdown{
  display:inline-flex;
  align-items:center;
  gap:8px;
  white-space:nowrap;
}
.cd-label{color:rgba(237,233,245,.66);}
.cd-num{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-weight:700;
  color:#fff;
  letter-spacing:.04em;
}

/* 主导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 10px 30px -18px rgba(20,16,31,.28);}
.nav-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:var(--nav-h);
  transition:height .22s var(--ease);
}
.site-header.is-scrolled .nav-inner{height:60px;}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--text);
}
.brand:hover{color:var(--text);}
.brand-mark{
  width:28px;height:28px;border-radius:8px;
  background:var(--brand-700);
  position:relative;
  flex:0 0 28px;
}
.brand-mark::before{
  content:"";
  position:absolute;inset:7px;
  background:var(--accent-500);
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
}
.brand-text{
  font-size:19px;
  font-weight:800;
  letter-spacing:-.01em;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:26px;
  margin-left:8px;
}
.main-nav a{
  position:relative;
  font-size:15px;
  font-weight:600;
  color:var(--text-muted);
  padding:6px 0;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--accent-500);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s var(--ease);
}
.main-nav a:hover{color:var(--text);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.is-active{color:var(--text);}
.main-nav a.is-active::after{transform:scaleX(1);}
.nav-actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:16px;
}
.link-plain{
  font-size:15px;
  font-weight:600;
  color:var(--text-muted);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
}
.link-plain:hover{color:var(--accent-500);border-bottom-color:var(--accent-500);}
.hamburger{
  display:none;
  width:44px;height:44px;
  margin-left:auto;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--surface);
  position:relative;
  cursor:pointer;
}
.hamburger span{
  position:absolute;left:12px;right:12px;height:2px;
  background:var(--text);border-radius:2px;
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.hamburger span:nth-child(1){top:15px;}
.hamburger span:nth-child(2){top:21px;}
.hamburger span:nth-child(3){top:27px;}
.hamburger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.hamburger.is-open span:nth-child(2){opacity:0;}
.hamburger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 24px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:700;
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn:hover{transform:translateY(-1px);}
.btn-primary{background:var(--brand-700);color:#fff;}
.btn-primary:hover{background:var(--accent-500);color:#fff;box-shadow:var(--shadow-1);}
.btn-ghost{background:transparent;color:var(--brand-700);border-color:var(--brand-700);}
.btn-ghost:hover{background:var(--brand-050);color:var(--brand-600);border-color:var(--brand-600);}
.btn-light{background:#fff;color:var(--ink-900);}
.btn-light:hover{background:var(--accent-500);color:#fff;}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);}
.btn-outline-light:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08);}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;}

/* 面包屑 */
.crumbs-wrap{
  background:var(--paper);
  border-bottom:1px solid var(--line);
}
.crumbs{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  color:var(--text-muted);
  padding:14px 0;
  flex-wrap:wrap;
}
.crumbs a{color:var(--text-muted);}
.crumbs a:hover{color:var(--accent-500);}
.crumbs .sep{color:#C4BED0;}
.crumbs .cur{color:var(--text);font-weight:700;}

/* 通用板块 */
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.sec-head{max-width:760px;margin-bottom:40px;}
.sec-head h2{font-size:clamp(26px,3.2vw,40px);font-weight:800;letter-spacing:-.01em;}
.sec-head p{margin-top:14px;color:var(--text-muted);font-size:16px;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--brand-700);
  background:var(--brand-050);
  border-radius:6px;
  padding:6px 12px;
  margin-bottom:20px;
}

/* Hero */
.page-hero{
  padding:64px 0 56px;
  background:
    linear-gradient(180deg,rgba(247,245,242,.94) 0%,rgba(247,245,242,.98) 100%),
    url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.page-hero h1{
  font-size:clamp(34px,5.2vw,72px);
  line-height:1.06;
  font-weight:900;
  letter-spacing:-.02em;
  max-width:16em;
}
.page-hero .lede{
  margin-top:22px;
  max-width:660px;
  font-size:17px;
  color:var(--text-muted);
  line-height:1.8;
}
.hero-actions{
  margin-top:32px;
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}
.hero-facts{
  margin-top:40px;
  display:flex;
  flex-wrap:wrap;
  gap:40px;
  padding-top:24px;
  border-top:1px solid var(--line);
}
.fact b{
  display:block;
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:26px;
  font-weight:800;
  color:var(--brand-700);
  letter-spacing:-.01em;
}
.fact span{font-size:13px;color:var(--text-muted);}

/* 5/7 分栏 */
.split-grid{align-items:flex-start;}
.portrait-fig{
  position:relative;
  margin:0;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
  background:var(--brand-050);
  aspect-ratio:3 / 4;
}
.portrait-fig img{width:100%;height:100%;object-fit:cover;}
.fig-badge{
  position:absolute;
  left:16px;bottom:16px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(255,255,255,.95);
  color:var(--text);
  font-size:13px;
  font-weight:700;
  border-radius:6px;
  padding:8px 12px;
  box-shadow:var(--shadow-1);
}
.mini-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  height:100%;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.mini-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-1);
  border-color:#D9D2EE;
}
.mini-card h3{font-size:20px;font-weight:700;margin-top:14px;}
.mini-card p{margin-top:10px;color:var(--text-muted);font-size:15px;line-height:1.72;}
.tag{
  display:inline-block;
  font-size:12px;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--brand-700);
  background:var(--brand-050);
  border-radius:6px;
  padding:5px 10px;
}
.gap-top{margin-top:24px;}

/* 适配要点清单 */
.check-list{
  border-top:1px solid var(--line);
}
.check-list li{
  display:flex;
  gap:16px;
  align-items:flex-start;
  padding:24px 0;
  border-bottom:1px solid var(--line);
  transition:transform .22s var(--ease);
}
.check-list li:hover{transform:translateX(4px);}
.check-list li:hover .check-title{color:var(--accent-500);}
.check-ico{
  flex:0 0 24px;
  width:24px;height:24px;
  margin-top:3px;
  border-radius:50%;
  background:var(--brand-050);
  display:inline-flex;
  align-items:center;
  justify-content:center;
}
.check-ico svg{width:13px;height:13px;fill:none;stroke:var(--brand-700);stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round;}
.check-title{
  font-size:18px;
  font-weight:700;
  transition:color .2s var(--ease);
}
.check-body{
  margin-top:6px;
  color:var(--text-muted);
  font-size:15px;
  line-height:1.72;
  max-width:70ch;
}

/* 数据带 */
.stats-band{
  margin-top:40px;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--surface);
  overflow:hidden;
}
.stats-band .stat{
  padding:28px 24px;
  border-right:1px solid var(--line);
}
.stats-band .stat:last-child{border-right:0;}
.stat b{
  display:block;
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:clamp(30px,4vw,44px);
  font-weight:800;
  color:var(--brand-700);
  letter-spacing:-.02em;
  line-height:1.1;
}
.stat span{display:block;margin-top:8px;font-size:13px;color:var(--text-muted);}

/* 图文交替 */
.media-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
}
.media-row + .media-row{margin-top:72px;}
.media-row.is-reverse .media-fig{order:2;}
.media-fig{
  margin:0;
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
  background:var(--brand-050);
  aspect-ratio:16 / 9;
}
.media-fig img{width:100%;height:100%;object-fit:cover;}
.media-body h3{font-size:clamp(22px,2.4vw,28px);font-weight:800;margin-top:14px;}
.media-body p{margin-top:14px;color:var(--text-muted);font-size:16px;line-height:1.8;}
.media-body .btn{margin-top:24px;}

/* 表格 */
.table-scroll{
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--surface);
  -webkit-overflow-scrolling:touch;
}
table.data-table{
  width:100%;
  min-width:720px;
  border-collapse:collapse;
  font-size:15px;
}
table.data-table th,
table.data-table td{
  text-align:left;
  padding:16px 20px;
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
table.data-table thead th{
  background:var(--brand-050);
  color:var(--brand-700);
  font-size:13px;
  font-weight:700;
  letter-spacing:.04em;
  white-space:nowrap;
}
table.data-table tbody tr:last-child td{border-bottom:0;}
table.data-table tbody tr:hover td{background:#FCFBF9;}
table.data-table td:first-child{font-weight:700;}

/* FAQ */
.faq-columns{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:0 48px;
}
.faq-item{
  border-bottom:1px solid var(--line);
}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:22px 0;
  font-size:17px;
  font-weight:700;
  cursor:pointer;
  list-style:none;
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--accent-500);}
.faq-ico{
  position:relative;
  flex:0 0 22px;
  width:22px;height:22px;
}
.faq-ico::before,
.faq-ico::after{
  content:"";
  position:absolute;
  background:var(--brand-700);
  border-radius:2px;
  transition:transform .22s var(--ease),background-color .2s var(--ease);
}
.faq-ico::before{left:3px;right:3px;top:10px;height:2px;}
.faq-ico::after{top:3px;bottom:3px;left:10px;width:2px;}
.faq-item[open] .faq-ico::after{transform:scaleY(0);}
.faq-item summary:hover .faq-ico::before,
.faq-item summary:hover .faq-ico::after{background:var(--accent-500);}
.faq-body{
  padding:0 0 24px;
  color:var(--text-muted);
  font-size:15.5px;
  line-height:1.8;
  max-width:62ch;
}

/* 相关分类 */
.related{
  background:var(--surface);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.related-links{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  margin-top:32px;
}
.related-card{
  display:block;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  background:var(--paper);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.related-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-1);
  border-color:#D9D2EE;
}
.related-card h3{
  font-size:18px;
  font-weight:700;
  color:var(--text);
  transition:color .2s var(--ease);
}
.related-card:hover h3{color:var(--accent-500);}
.related-card p{margin-top:10px;font-size:14px;color:var(--text-muted);}

/* CTA */
.cta-sec{
  position:relative;
  background:
    linear-gradient(135deg,rgba(58,30,110,.94),rgba(20,16,31,.92)),
    url("/assets/images/backpic/back-3.webp") center/cover no-repeat;
  color:#fff;
  padding:96px 0;
  text-align:center;
}
.cta-sec h2{
  color:#fff;
  font-size:clamp(26px,3.4vw,42px);
  font-weight:800;
  letter-spacing:-.01em;
}
.cta-sec p{
  margin:18px auto 0;
  max-width:620px;
  color:rgba(255,255,255,.76);
  font-size:17px;
}
.cta-actions{
  margin-top:32px;
  display:flex;
  justify-content:center;
  flex-wrap:wrap;
  gap:14px;
}

/* 页脚 */
.site-footer{
  background:var(--ink-900);
  color:rgba(255,255,255,.72);
  padding:72px 0 0;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:#fff;
}
.footer-brand:hover{color:#fff;}
.footer-brand .brand-text{font-size:18px;font-weight:800;}
.footer-about{
  margin-top:18px;
  line-height:1.8;
  max-width:34ch;
  color:rgba(255,255,255,.62);
}
.footer-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:20px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--accent-100);
  background:rgba(255,122,69,.16);
  border-radius:6px;
  padding:6px 12px;
}
.footer-col h4{
  color:#fff;
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  margin-bottom:18px;
}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul li a{color:rgba(255,255,255,.72);}
.footer-col ul li a:hover{color:var(--accent-500);}
.footer-col ul li span{color:rgba(255,255,255,.55);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:24px 0 28px;
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.5);
}

/* 浮动元素 */
.float-cta{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:70;
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:48px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  background:var(--brand-700);
  color:#fff;
  font-size:15px;
  font-weight:700;
  box-shadow:var(--shadow-2);
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),background-color .2s var(--ease),visibility .24s;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:var(--accent-500);color:#fff;}
.float-cta .dot{background:var(--accent-500);}
.float-cta:hover .dot{background:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.22);}
.to-top{
  position:fixed;
  right:24px;
  bottom:88px;
  z-index:70;
  width:48px;height:48px;
  border-radius:50%;
  background:var(--surface);
  border:1px solid var(--line);
  color:var(--brand-700);
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:var(--shadow-1);
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s,border-color .2s var(--ease),color .2s var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{border-color:var(--accent-500);color:var(--accent-500);}
.to-top svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;}

/* 抽屉 */
.drawer{
  position:fixed;
  top:0;right:0;bottom:0;
  width:280px;
  background:var(--surface);
  z-index:120;
  transform:translateX(100%);
  transition:transform .24s var(--ease);
  display:flex;
  flex-direction:column;
  padding:20px 0 0;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{
  padding:0 20px 18px;
  border-bottom:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.drawer-close{
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--surface);
  cursor:pointer;
  font-size:18px;
  color:var(--text);
  line-height:1;
}
.drawer-nav a{
  display:flex;
  align-items:center;
  height:56px;
  padding:0 20px;
  font-size:18px;
  font-weight:600;
  color:var(--text);
  border-bottom:1px solid var(--line);
}
.drawer-nav a:hover,
.drawer-nav a.is-active{color:var(--accent-500);background:#FCFBF9;}
.drawer-foot{
  margin-top:auto;
  padding:20px;
}
.drawer-foot .btn{width:100%;}
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(20,16,31,.5);
  z-index:110;
  opacity:0;
  visibility:hidden;
  transition:opacity .24s var(--ease),visibility .24s;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
body.drawer-open{overflow:hidden;}

/* 入场动效 */
.fade-in{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
.fade-in.is-in{opacity:1;transform:none;}

/* 响应式 */
@media (max-width:1023px){
  .main-nav,.nav-actions{display:none;}
  .hamburger{display:block;}
  .section{padding:72px 0;}
  .media-row{grid-template-columns:1fr;gap:28px;}
  .media-row.is-reverse .media-fig{order:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .faq-columns{grid-template-columns:1fr;gap:0;}
  .related-links{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  .container{padding-left:16px;padding-right:16px;}
  .section{padding:56px 0;}
  .page-hero{padding:44px 0 40px;}
  .hero-facts{gap:28px;}
  .stats-band{grid-template-columns:1fr;}
  .stats-band .stat{border-right:0;border-bottom:1px solid var(--line);}
  .stats-band .stat:last-child{border-bottom:0;}
  .related-links{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  body{padding-bottom:64px;}
  .float-cta{
    left:0;right:0;bottom:0;
    border-radius:0;
    justify-content:center;
    height:64px;
    padding:0 16px calc(env(safe-area-inset-bottom,0px));
    transform:translateY(100%);
  }
  .float-cta.is-visible{transform:translateY(0);}
  .to-top{
    left:16px;
    right:auto;
    bottom:80px;
    width:44px;height:44px;
  }
  .cd-label{display:none;}
  .mini-card{padding:20px;}
  .cta-sec{padding:64px 0;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  .fade-in{opacity:1;transform:none;}
}

/* roulang page: category4 */
:root{
  --ink-900:#14101F;
  --brand-700:#3A1E6E;
  --brand-600:#4C2A8C;
  --brand-050:#F1ECFA;
  --accent-500:#FF7A45;
  --accent-100:#FFE9DF;
  --paper:#F7F5F2;
  --surface:#FFFFFF;
  --line:#E6E1DC;
  --text:#17131F;
  --text-muted:#6E6877;
  --ok:#12A67A;
  --warn:#E8A33D;
  --radius-card:16px;
  --radius-img:14px;
  --radius-input:10px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(20,16,31,.06), 0 8px 24px -12px rgba(20,16,31,.14);
  --shadow-2:0 2px 6px rgba(20,16,31,.08), 0 18px 40px -16px rgba(20,16,31,.22);
  --ease:cubic-bezier(.2,.7,.2,1);
  --nav-h:68px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--brand-700);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--accent-500);}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:none;background:none;}
h1,h2,h3,h4{margin:0;line-height:1.2;font-weight:800;letter-spacing:-.01em;}
p{margin:0 0 1em;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand-700);outline-offset:2px;border-radius:4px;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;}

.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ============ 顶部状态条 ============ */
.topbar{
  background:var(--ink-900);
  color:#EAE6F2;
  font-size:13px;
  height:32px;
  display:flex;
  align-items:center;
}
.topbar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  overflow:hidden;
  white-space:nowrap;
}
.status-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:700;
  font-size:12px;
  letter-spacing:.08em;
  color:#F3EEF8;
}
.dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--accent-500);
  display:inline-block;
  flex:none;
}
.countdown{
  display:inline-flex;
  align-items:center;
  gap:2px;
  font-size:12px;
  color:#C9C0DC;
}
.cd-label{margin-right:8px;letter-spacing:.06em;}
.cd-num{
  font-variant-numeric:tabular-nums;
  color:#FFFFFF;
  font-weight:700;
  min-width:20px;
  text-align:center;
}
.cd-sep{color:#6E6188;}

/* ============ Header ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:900;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease), height .22s var(--ease);
}
.site-header.is-stuck{box-shadow:0 6px 20px -14px rgba(20,16,31,.4);}
.nav-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:var(--nav-h);
  transition:height .22s var(--ease);
}
.site-header.is-stuck .nav-inner{height:60px;}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:none;
  color:var(--text);
  font-weight:800;
}
.brand:hover{color:var(--text);}
.brand-mark{
  width:28px;
  height:28px;
  border-radius:9px;
  background:var(--brand-700);
  position:relative;
  flex:none;
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset:7px;
  border-radius:3px;
  background:var(--accent-500);
  transform:rotate(12deg);
}
.brand-text{
  font-size:19px;
  letter-spacing:-.01em;
  font-weight:800;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:26px;
  margin-left:8px;
  flex:1 1 auto;
}
.main-nav a{
  position:relative;
  color:var(--text);
  font-size:15px;
  font-weight:600;
  padding:6px 0;
  white-space:nowrap;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  height:2px;
  width:0;
  background:var(--accent-500);
  transition:width .22s var(--ease);
}
.main-nav a:hover{color:var(--brand-700);}
.main-nav a:hover::after{width:100%;}
.main-nav a.is-active{color:var(--brand-700);font-weight:800;}
.main-nav a.is-active::after{width:100%;}
.nav-actions{
  display:flex;
  align-items:center;
  gap:16px;
  flex:none;
  margin-left:auto;
}
.link-plain{
  font-size:14px;
  font-weight:600;
  color:var(--text-muted);
  white-space:nowrap;
}
.link-plain:hover{color:var(--accent-500);}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 22px;
  border-radius:var(--radius-pill);
  font-size:15px;
  font-weight:700;
  letter-spacing:.01em;
  transition:background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
  white-space:nowrap;
  border:1px solid transparent;
}
.btn-primary{
  background:var(--brand-700);
  color:#fff;
}
.btn-primary:hover{
  background:var(--accent-500);
  color:#fff;
  transform:translateY(-1px);
  box-shadow:var(--shadow-1);
}
.btn-outline{
  background:transparent;
  border-color:var(--line);
  color:var(--text);
}
.btn-outline:hover{
  border-color:var(--brand-700);
  color:var(--brand-700);
  background:#fff;
}
.btn-light{
  background:#fff;
  color:var(--ink-900);
}
.btn-light:hover{background:var(--accent-100);color:var(--ink-900);}
.btn-ghost-light{
  background:transparent;
  border-color:rgba(255,255,255,.4);
  color:#fff;
}
.btn-ghost-light:hover{border-color:#fff;background:rgba(255,255,255,.12);color:#fff;}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}

.hamburger{
  display:none;
  width:44px;
  height:44px;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:5px;
  margin-left:auto;
  border-radius:10px;
}
.hamburger span{
  display:block;
  width:24px;
  height:2px;
  background:var(--text);
  border-radius:2px;
  transition:transform .22s var(--ease), opacity .22s var(--ease);
}
.hamburger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.is-open span:nth-child(2){opacity:0;}
.hamburger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ============ 抽屉 ============ */
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(20,16,31,.5);
  opacity:0;
  visibility:hidden;
  transition:opacity .22s var(--ease), visibility .22s var(--ease);
  z-index:950;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;
  top:0;
  right:0;
  height:100%;
  width:280px;
  max-width:86vw;
  background:#fff;
  z-index:960;
  transform:translateX(100%);
  transition:transform .24s var(--ease);
  display:flex;
  flex-direction:column;
  padding:20px 0 0;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{
  padding:0 20px 16px;
  border-bottom:1px solid var(--line);
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:800;
}
.drawer-nav{display:flex;flex-direction:column;}
.drawer-nav a{
  display:flex;
  align-items:center;
  height:56px;
  padding:0 20px;
  font-size:18px;
  font-weight:600;
  color:var(--text);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--brand-700);font-weight:800;}
.drawer-nav a:hover{color:var(--brand-700);}
.drawer-foot{padding:20px;margin-top:auto;}

/* ============ 网格 ============ */
.grid-x{margin-left:-12px;margin-right:-12px;}
.grid-x > .cell{padding-left:12px;padding-right:12px;}
@media screen and (max-width:639px){
  .grid-x{margin-left:-8px;margin-right:-8px;}
  .grid-x > .cell{padding-left:8px;padding-right:8px;}
}

/* ============ 页面横幅 ============ */
.page-hero{
  position:relative;
  background-image:linear-gradient(110deg, rgba(58,30,110,.92) 0%, rgba(58,30,110,.72) 52%, rgba(76,42,140,.58) 100%), url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  color:#fff;
  padding:56px 0 60px;
}
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  color:rgba(255,255,255,.72);
  margin-bottom:22px;
  flex-wrap:wrap;
}
.crumb a{color:rgba(255,255,255,.86);}
.crumb a:hover{color:var(--accent-100);}
.crumb .sep{color:rgba(255,255,255,.45);}
.page-hero h1{
  font-size:clamp(34px,4.6vw,58px);
  line-height:1.08;
  letter-spacing:-.02em;
  font-weight:900;
  max-width:16em;
  color:#fff;
}
.page-hero .hero-lead{
  margin-top:18px;
  font-size:17px;
  line-height:1.75;
  color:rgba(255,255,255,.86);
  max-width:62ch;
}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:26px;
}
.hero-tags span{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:13px;
  font-weight:600;
  padding:7px 14px;
  border-radius:var(--radius-pill);
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.26);
  color:#fff;
}
.hero-tags .dot{background:var(--accent-500);}

/* ============ 板块通用 ============ */
.section{padding:96px 0;}
.section-sm{padding:72px 0;}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--brand-700);
  margin-bottom:16px;
}
.eyebrow::before{
  content:"";
  width:3px;
  height:14px;
  background:var(--accent-500);
  border-radius:2px;
}
.sec-title{
  font-size:clamp(26px,3.2vw,40px);
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.015em;
}
.sec-desc{
  margin-top:16px;
  color:var(--text-muted);
  font-size:16px;
  line-height:1.8;
  max-width:64ch;
}
.sec-head{margin-bottom:48px;}
.sec-num{
  font-size:14px;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--brand-700);
  font-variant-numeric:tabular-nums;
  display:block;
  margin-bottom:14px;
}

/* ============ 支持范围卡片 ============ */
.scope-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px 24px;
  height:100%;
  transition:transform .22s var(--ease), box-shadow .22s var(--ease), border-color .22s var(--ease);
}
.scope-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-2);
  border-color:#D9D2EE;
}
.scope-icon{
  width:44px;height:44px;
  border-radius:12px;
  background:var(--brand-050);
  color:var(--brand-700);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;
  margin-bottom:18px;
}
.scope-card h3{
  font-size:20px;
  font-weight:700;
  margin-bottom:10px;
}
.scope-card p{
  color:var(--text-muted);
  font-size:15px;
  line-height:1.8;
  margin-bottom:16px;
}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:700;
  color:var(--brand-700);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
}
.text-link:hover{color:var(--accent-500);border-bottom-color:var(--accent-500);}
.text-link i{font-size:12px;transition:transform .2s var(--ease);}
.text-link:hover i{transform:translateX(3px);}

/* ============ FAQ 区 ============ */
.faq-layout{align-items:flex-start;}
.faq-col{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:8px 24px;
  height:100%;
}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:none;}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:16px;
  padding:18px 0;
  font-size:16px;
  font-weight:700;
  line-height:1.6;
  color:var(--text);
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--accent-500);}
.faq-item summary::after{
  content:"+";
  flex:none;
  width:24px;
  height:24px;
  margin-top:2px;
  border-radius:6px;
  background:var(--brand-050);
  color:var(--brand-700);
  font-size:18px;
  font-weight:700;
  line-height:22px;
  text-align:center;
  transition:transform .22s var(--ease), background .22s var(--ease), color .22s var(--ease);
}
.faq-item[open] summary::after{
  transform:rotate(45deg);
  background:var(--accent-100);
  color:var(--accent-500);
}
.faq-body{
  padding:0 36px 20px 0;
  font-size:15.5px;
  line-height:1.85;
  color:var(--text-muted);
}
.faq-body p{margin:0;}

/* ============ 联系卡 ============ */
.contact-card{
  background:var(--brand-050);
  border:1px solid #E0D6F4;
  border-radius:var(--radius-card);
  padding:28px 24px;
  position:sticky;
  top:calc(var(--nav-h) + 20px);
}
.contact-card h3{
  font-size:22px;
  font-weight:800;
  margin-bottom:12px;
}
.contact-card p{
  color:var(--text-muted);
  font-size:15px;
  line-height:1.8;
}
.contact-status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-weight:700;
  padding:6px 12px;
  border-radius:var(--radius-pill);
  background:rgba(18,166,122,.12);
  color:#0E7A5B;
  margin-bottom:18px;
}
.contact-status .dot{background:var(--ok);}
.contact-list{
  margin:20px 0 24px;
  border-top:1px solid #DED3F2;
}
.contact-list li{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 0;
  border-bottom:1px solid #DED3F2;
  font-size:14px;
  color:var(--text-muted);
}
.contact-list li strong{
  color:var(--text);
  font-weight:700;
}
.contact-note{
  font-size:13px;
  color:var(--text-muted);
  line-height:1.7;
  margin-top:16px;
  margin-bottom:0;
}

/* ============ 流程区 ============ */
.flow-figure{
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:#fff;
}
.flow-figure img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
}
.step{
  display:flex;
  gap:18px;
  padding:22px 0;
  border-bottom:1px solid var(--line);
}
.step:last-child{border-bottom:none;}
.step-no{
  flex:none;
  width:44px;
  height:44px;
  border-radius:12px;
  background:var(--surface);
  border:1px solid var(--line);
  color:var(--brand-700);
  font-weight:800;
  font-variant-numeric:tabular-nums;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:15px;
}
.step h3{
  font-size:19px;
  font-weight:700;
  margin-bottom:8px;
  padding-top:8px;
}
.step p{
  color:var(--text-muted);
  font-size:15px;
  line-height:1.8;
  margin:0;
}

/* ============ 表单 ============ */
.form-panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:36px 32px;
  box-shadow:var(--shadow-1);
}
.form-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px 24px;
}
.field{display:flex;flex-direction:column;gap:8px;}
.field-full{grid-column:1 / -1;}
.field label{
  font-size:13px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--text);
}
.field label .req{color:var(--accent-500);margin-left:2px;}
.field input,
.field select,
.field textarea{
  width:100%;
  min-height:44px;
  padding:10px 14px;
  border:1px solid var(--line);
  border-radius:var(--radius-input);
  background:#fff;
  font-size:15px;
  line-height:1.6;
  transition:border-color .2s var(--ease), box-shadow .2s var(--ease);
  appearance:none;
}
.field textarea{min-height:120px;resize:vertical;}
.field select{
  background-image:url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236E6877' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 14px center;
  padding-right:36px;
}
.field input:focus,
.field select:focus,
.field textarea:focus{
  outline:none;
  border-color:var(--brand-700);
  box-shadow:0 0 0 2px rgba(58,30,110,.18);
}
.field.has-error input,
.field.has-error select,
.field.has-error textarea{
  border-color:var(--accent-500);
  box-shadow:0 0 0 2px rgba(255,122,69,.16);
}
.field .err-msg{
  display:none;
  font-size:15px;
  color:var(--accent-500);
  line-height:1.5;
}
.field.has-error .err-msg{display:block;}
.form-foot{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:18px;
  margin-top:26px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.form-tip{
  font-size:13px;
  color:var(--text-muted);
  margin:0;
  flex:1 1 240px;
}
.form-alert{
  display:none;
  align-items:center;
  gap:10px;
  margin-top:20px;
  padding:14px 18px;
  border-radius:var(--radius-input);
  background:rgba(18,166,122,.1);
  border:1px solid rgba(18,166,122,.3);
  color:#0E7A5B;
  font-size:14px;
  font-weight:600;
}
.form-alert.is-visible{display:flex;}

/* ============ 通栏 CTA ============ */
.cta-band{
  background:var(--ink-900);
  color:#fff;
  padding:84px 0;
  text-align:center;
}
.cta-band h2{
  font-size:clamp(26px,3.2vw,40px);
  font-weight:800;
  color:#fff;
  letter-spacing:-.015em;
}
.cta-band p{
  margin:18px auto 0;
  max-width:60ch;
  color:rgba(255,255,255,.72);
  font-size:16px;
  line-height:1.8;
}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:16px;
  justify-content:center;
  margin-top:34px;
}

/* ============ 相关分类 ============ */
.relate-row{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
  margin-top:32px;
}
.relate-item{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:20px 22px;
  color:var(--text);
  font-weight:700;
  transition:transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.relate-item:hover{
  transform:translateY(-4px);
  border-color:#D9D2EE;
  box-shadow:var(--shadow-2);
  color:var(--brand-700);
}
.relate-item span small{
  display:block;
  font-size:13px;
  font-weight:500;
  color:var(--text-muted);
  margin-top:4px;
}
.relate-item i{color:var(--accent-500);font-size:14px;}

/* ============ 浮动 CTA / 返回顶部 ============ */
.float-cta{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:880;
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:50px;
  padding:0 24px;
  border-radius:var(--radius-pill);
  background:var(--brand-700);
  color:#fff;
  font-size:15px;
  font-weight:700;
  box-shadow:var(--shadow-2);
  transform:translateY(130%);
  opacity:0;
  visibility:hidden;
  transition:transform .26s var(--ease), opacity .26s var(--ease), visibility .26s var(--ease), background .2s var(--ease);
}
.float-cta.is-visible{transform:translateY(0);opacity:1;visibility:visible;}
.float-cta:hover{background:var(--accent-500);color:#fff;}
.float-cta .dot{width:8px;height:8px;box-shadow:0 0 0 3px rgba(255,122,69,.32);}

.back-top{
  position:fixed;
  left:24px;
  bottom:24px;
  width:46px;
  height:46px;
  border-radius:50%;
  background:#fff;
  border:1px solid var(--line);
  color:var(--brand-700);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:15px;
  box-shadow:var(--shadow-1);
  z-index:870;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .24s var(--ease), transform .24s var(--ease), visibility .24s var(--ease), color .2s var(--ease);
}
.back-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{color:var(--accent-500);}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-900);
  color:rgba(255,255,255,.72);
  padding:72px 0 28px;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-weight:800;
  font-size:18px;
  margin-bottom:16px;
}
.footer-brand:hover{color:#fff;}
.footer-about{
  font-size:14px;
  line-height:1.85;
  color:rgba(255,255,255,.62);
  max-width:34ch;
  margin-bottom:18px;
}
.footer-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-weight:700;
  padding:6px 12px;
  border-radius:var(--radius-pill);
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.14);
  color:rgba(255,255,255,.82);
}
.footer-col h4{
  font-size:14px;
  font-weight:800;
  color:#fff;
  letter-spacing:.06em;
  margin-bottom:18px;
}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul li a,
.footer-col ul li span{
  color:rgba(255,255,255,.66);
  font-size:14px;
  line-height:1.6;
}
.footer-col ul li a:hover{color:var(--accent-500);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  align-items:center;
  border-top:1px solid rgba(255,255,255,.12);
  padding-top:24px;
  font-size:13px;
  color:rgba(255,255,255,.52);
}

/* ============ 入场动效 ============ */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s var(--ease), transform .5s var(--ease);
}
.reveal.is-in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media screen and (max-width:1023px){
  .main-nav,.nav-actions{display:none;}
  .hamburger{display:flex;}
  .section{padding:72px 0;}
  .section-sm{padding:56px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .contact-card{position:static;margin-top:24px;}
  .relate-row{grid-template-columns:1fr;}
  .form-panel{padding:28px 22px;}
}
@media screen and (max-width:767px){
  .container{padding-left:16px;padding-right:16px;}
  .page-hero{padding:36px 0 40px;}
  .page-hero .hero-lead{font-size:16px;}
  .sec-head{margin-bottom:32px;}
  .form-grid{grid-template-columns:1fr;gap:18px;}
  .faq-col{padding:4px 20px;}
  .faq-body{padding-right:24px;}
  .cta-band{padding:64px 0;}
  .cta-actions .btn{width:100%;}
  .flow-figure{margin-bottom:8px;}
}
@media screen and (max-width:639px){
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .topbar{font-size:12px;}
  .cd-label{display:none;}
  .float-cta{
    left:0;
    right:0;
    bottom:0;
    border-radius:0;
    justify-content:center;
    min-height:64px;
    padding-bottom:env(safe-area-inset-bottom);
  }
  .back-top{
    left:16px;
    bottom:calc(76px + env(safe-area-inset-bottom));
    width:44px;height:44px;
  }
  .step{gap:14px;}
  .step h3{padding-top:4px;font-size:18px;}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important;}
  .reveal{opacity:1;transform:none;}
}