/* roulang page: index */
:root{
  --bg-0:#05080F;
  --bg-1:#080E1B;
  --bg-2:#0D1730;
  --glass:rgba(120,160,255,0.055);
  --line:rgba(140,170,255,0.14);
  --primary:#2F6FED;
  --primary-2:#4D8BFF;
  --primary-3:#1B4BB8;
  --accent:#2FE0C8;
  --warm:#FFB86B;
  --t1:#EAF0FF;
  --t2:#A8B6D4;
  --t3:#6C7A99;
  --r-card:18px;
  --r-sm:12px;
  --shadow-card:0 24px 60px -28px rgba(0,0,0,.85);
  --ease:240ms cubic-bezier(.22,.61,.36,1);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:linear-gradient(rgba(140,170,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(140,170,255,.035) 1px,transparent 1px);
  background-size:48px 48px;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:radial-gradient(60% 55% at 8% 0%,rgba(47,111,237,.20),transparent 70%),radial-gradient(45% 45% at 95% 82%,rgba(47,224,200,.10),transparent 70%);
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button{font-family:inherit;}
h1,h2,h3,h4{color:var(--t1);font-weight:700;line-height:1.18;margin:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:2;
}
section{position:relative;z-index:2;}

/* ============ 导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:60;
  transition:background var(--ease),box-shadow var(--ease),backdrop-filter var(--ease);
  background:rgba(6,10,20,.35);
  backdrop-filter:blur(18px) saturate(150%);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  border-bottom:1px solid var(--line);
}
.site-header.is-scrolled{
  background:rgba(5,8,15,.92);
  box-shadow:0 14px 40px -24px rgba(0,0,0,.95);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  height:76px;
  transition:height var(--ease);
}
.site-header.is-scrolled .nav-inner{height:64px;}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;}
.brand-mark{
  width:24px;height:24px;
  border-radius:8px;
  background:linear-gradient(140deg,#3B7BFF,#1B4BB8);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 0 1px rgba(77,139,255,.5),0 8px 20px -10px rgba(47,111,237,.9);
  flex-shrink:0;
}
.brand-mark svg{width:15px;height:15px;color:#EAF0FF;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-main{font-size:18px;font-weight:700;color:var(--t1);letter-spacing:.01em;}
.brand-sub{font-size:11px;font-weight:500;letter-spacing:.08em;color:var(--t2);opacity:.7;}
.nav-links{display:flex;align-items:center;gap:26px;}
.nav-link{
  position:relative;
  font-size:14px;
  color:var(--t2);
  padding:6px 0;
  transition:color var(--ease);
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:0;height:2px;
  background:var(--accent);
  border-radius:2px;
  transition:width var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--t1);}
.nav-link:hover::after,.nav-link:focus-visible::after{width:100%;}
.nav-link.active{color:var(--t1);}
.nav-link.active::after{width:100%;background:var(--accent);}
.nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.icon-btn{
  width:38px;height:38px;border-radius:50%;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.04);
  display:flex;align-items:center;justify-content:center;
  color:var(--t1);
  cursor:pointer;
  transition:all var(--ease);
}
.icon-btn:hover,.icon-btn:focus-visible{
  border-color:var(--primary-2);
  background:rgba(47,111,237,.18);
  box-shadow:0 0 0 3px rgba(47,111,237,.18);
  outline:none;
}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;
  border-radius:999px;
  font-size:14px;font-weight:600;
  color:#fff;
  background:linear-gradient(135deg,#3B7BFF,#2F6FED);
  box-shadow:0 0 0 1px rgba(77,139,255,.55),0 10px 34px -8px rgba(47,111,237,.7);
  transition:all var(--ease);
  border:none;cursor:pointer;
  white-space:nowrap;
}
.btn-main:hover{
  transform:translateY(-1px);
  background:linear-gradient(135deg,#4D8BFF,#3B7BFF);
  box-shadow:0 0 0 1px rgba(77,139,255,.75),0 14px 40px -8px rgba(77,139,255,.85);
  color:#fff;
}
.btn-main:active{transform:translateY(0);filter:brightness(.94);}
.btn-main:focus-visible{outline:2px solid var(--accent);outline-offset:3px;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;
  border-radius:999px;
  font-size:14px;font-weight:600;
  color:var(--t1);
  background:transparent;
  border:1px solid rgba(255,255,255,.18);
  transition:all var(--ease);
  cursor:pointer;
  white-space:nowrap;
}
.btn-ghost:hover,.btn-ghost:focus-visible{
  background:rgba(47,111,237,.16);
  border-color:var(--primary-2);
  color:var(--t1);
  outline:none;
}
.btn-ghost:active{filter:brightness(.92);}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;
  color:var(--primary-2);
  border-bottom:1px solid transparent;
  transition:all var(--ease);
  padding-bottom:2px;
}
.text-link svg{transition:transform var(--ease);}
.text-link:hover,.text-link:focus-visible{color:var(--accent);border-bottom-color:var(--accent);outline:none;}
.text-link:hover svg{transform:translateX(4px);}
.menu-toggle{display:none;}
.mobile-drawer{
  position:fixed;
  inset:0;
  z-index:80;
  background:rgba(5,8,15,.97);
  backdrop-filter:blur(22px);
  -webkit-backdrop-filter:blur(22px);
  transform:translateY(-100%);
  opacity:0;
  pointer-events:none;
  transition:transform 320ms cubic-bezier(.22,.61,.36,1),opacity 320ms;
  display:flex;
  flex-direction:column;
  padding:24px 24px 32px;
  overflow-y:auto;
}
.mobile-drawer.open{transform:translateY(0);opacity:1;pointer-events:auto;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;}
.drawer-nav{display:flex;flex-direction:column;gap:4px;flex:1;}
.drawer-link{
  font-size:18px;color:var(--t1);
  padding:14px 0;
  border-bottom:1px solid rgba(140,170,255,.1);
  transition:color var(--ease);
}
.drawer-link:hover,.drawer-link:focus-visible{color:var(--accent);outline:none;}
.drawer-link.active{color:var(--accent);}
.drawer-cta{margin-top:24px;}

/* ============ Hero ============ */
.hero{
  padding:150px 0 90px;
  overflow:hidden;
}
.hero-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:56px;
  align-items:center;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 16px;
  border-radius:999px;
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  font-size:13px;
  color:var(--t2);
  margin-bottom:26px;
}
.eyebrow .dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 0 4px rgba(47,224,200,.16);
  flex-shrink:0;
}
.hero h1{
  font-size:clamp(2rem,4.4vw,3.4rem);
  letter-spacing:-.01em;
  margin-bottom:22px;
}
.hero h1 .hl{
  background:linear-gradient(120deg,#4D8BFF,#2FE0C8);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-sub{
  font-size:17px;
  line-height:1.9;
  color:var(--t2);
  max-width:620px;
  margin-bottom:34px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:38px;}
.hero-metrics{
  display:flex;flex-wrap:wrap;align-items:center;gap:22px;
  font-size:13px;color:var(--t3);
}
.hero-metrics .item{display:flex;align-items:center;gap:8px;}
.hero-metrics strong{color:var(--t1);font-size:20px;font-weight:700;font-variant-numeric:tabular-nums;}
.hero-metrics .divider{width:1px;height:18px;background:rgba(140,170,255,.2);}
.hero-visual{position:relative;}
.hero-visual .frame{
  position:relative;
  border-radius:20px;
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  aspect-ratio:4/3.35;
}
.hero-visual .frame img{
  width:100%;height:100%;object-fit:cover;
}
.hero-visual .frame::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,.15),rgba(5,8,15,.82));
}
.float-card{
  position:absolute;
  padding:14px 18px;
  border-radius:14px;
  background:rgba(13,23,48,.78);
  border:1px solid var(--line);
  box-shadow:0 20px 44px -22px rgba(0,0,0,.95),inset 0 1px 0 rgba(255,255,255,.06);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  z-index:3;
}
.float-card .fc-label{font-size:11px;letter-spacing:.08em;color:var(--t3);margin-bottom:4px;}
.float-card .fc-value{font-size:22px;font-weight:700;color:var(--t1);font-variant-numeric:tabular-nums;line-height:1.2;}
.float-card .fc-note{font-size:12px;color:var(--accent);}
.float-card.fc-a{left:-26px;bottom:44px;}
.float-card.fc-b{right:-14px;top:36px;}
.float-card.fc-b .fc-note{color:var(--warm);}

/* ============ 通用板块 ============ */
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:52px;}
.section-head h2{
  font-size:clamp(1.5rem,2.6vw,2.1rem);
  margin-bottom:16px;
}
.section-head p{color:var(--t2);font-size:16px;max-width:620px;}
.kicker{
  display:inline-block;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--accent);
  margin-bottom:14px;
  font-weight:600;
}
.bg-band{
  background:var(--bg-1);
  border-top:1px solid rgba(140,170,255,.08);
  border-bottom:1px solid rgba(140,170,255,.08);
}

/* ============ 服务矩阵 ============ */
.svc-layout{
  display:grid;
  grid-template-columns:1fr 2fr;
  gap:48px;
  align-items:start;
}
.svc-intro{position:sticky;top:110px;}
.svc-intro h2{font-size:clamp(1.5rem,2.6vw,2.1rem);margin-bottom:18px;}
.svc-intro p{color:var(--t2);margin-bottom:24px;max-width:340px;}
.svc-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:20px;
}
.svc-card{
  position:relative;
  padding:26px;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  transition:all var(--ease);
  display:flex;
  flex-direction:column;
  gap:12px;
  min-height:186px;
}
.svc-card:hover,.svc-card:focus-within{
  transform:translateY(-3px);
  border-color:rgba(77,139,255,.35);
  box-shadow:0 28px 64px -28px rgba(0,0,0,.9),0 0 0 1px rgba(77,139,255,.35),inset 0 1px 0 rgba(255,255,255,.08);
}
.svc-card.wide{grid-column:1/-1;min-height:210px;}
.svc-num{
  font-size:12px;letter-spacing:.12em;
  color:var(--t3);
  font-variant-numeric:tabular-nums;
}
.svc-icon{
  width:38px;height:38px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(47,111,237,.14);
  border:1px solid rgba(77,139,255,.28);
  color:var(--primary-2);
}
.svc-icon svg{width:19px;height:19px;}
.svc-card h3{font-size:20px;}
.svc-card p{font-size:14px;color:var(--t2);line-height:1.8;}
.svc-card .text-link{margin-top:auto;font-size:13px;}

/* ============ 数据带 ============ */
.stats-band{
  background:var(--bg-2);
  border-top:1px solid rgba(140,170,255,.1);
  border-bottom:1px solid rgba(140,170,255,.1);
  padding:56px 0;
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
}
.stat-item{
  padding:8px 26px;
  border-left:1px solid rgba(140,170,255,.14);
}
.stat-item:first-child{border-left:none;padding-left:0;}
.stat-num{
  font-size:clamp(28px,3.4vw,40px);
  font-weight:700;
  color:var(--accent);
  line-height:1.15;
  font-variant-numeric:tabular-nums;
  margin-bottom:8px;
}
.stat-num small{font-size:16px;font-weight:600;margin-left:2px;color:var(--t1);}
.stat-label{font-size:13px;color:var(--t2);line-height:1.6;}

/* ============ 案例 ============ */
.case-grid{
  display:grid;
  grid-template-columns:1.45fr 1fr 1fr;
  grid-template-rows:auto auto;
  gap:20px;
}
.case-card{
  position:relative;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  min-height:230px;
  transition:all var(--ease);
  display:block;
}
.case-card.big{grid-row:span 2;min-height:480px;}
.case-card.wide{grid-column:1/-1;min-height:210px;}
.case-card img{width:100%;height:100%;object-fit:cover;transition:transform 520ms cubic-bezier(.22,.61,.36,1);}
.case-card::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,.15),rgba(5,8,15,.88));
  transition:opacity var(--ease);
}
.case-card:hover{transform:translateY(-3px);border-color:rgba(77,139,255,.35);}
.case-card:hover img{transform:scale(1.04);}
.case-card:hover::after{opacity:.86;}
.case-body{
  position:absolute;left:0;right:0;bottom:0;
  padding:24px;
  z-index:2;
}
.case-tag{
  display:inline-block;
  font-size:11px;
  letter-spacing:.08em;
  color:var(--warm);
  border:1px solid rgba(255,184,107,.35);
  background:rgba(255,184,107,.08);
  border-radius:999px;
  padding:3px 10px;
  margin-bottom:10px;
}
.case-body h3{font-size:19px;margin-bottom:6px;}
.case-body p{font-size:13px;color:var(--t2);line-height:1.7;}
.case-card.big .case-body h3{font-size:23px;}

/* ============ 方案双行 ============ */
.plan-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
  margin-bottom:64px;
}
.plan-row:last-child{margin-bottom:0;}
.plan-row.reverse .plan-media{order:2;}
.plan-media{
  position:relative;
  border-radius:16px;
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  aspect-ratio:16/10;
}
.plan-media img{width:100%;height:100%;object-fit:cover;}
.plan-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,.1),rgba(5,8,15,.72));
}
.plan-num{
  font-size:64px;
  font-weight:700;
  line-height:1;
  color:transparent;
  -webkit-text-stroke:1.5px rgba(140,170,255,.32);
  margin-bottom:16px;
  font-variant-numeric:tabular-nums;
}
.plan-body h2{font-size:clamp(1.4rem,2.2vw,1.9rem);margin-bottom:16px;}
.plan-body > p{color:var(--t2);margin-bottom:22px;max-width:520px;}
.plan-points{display:flex;flex-direction:column;gap:12px;margin-bottom:26px;}
.plan-points li{
  display:flex;gap:12px;align-items:flex-start;
  font-size:15px;color:var(--t2);
}
.plan-points li::before{
  content:"";
  width:7px;height:7px;border-radius:2px;
  background:var(--accent);
  margin-top:9px;
  flex-shrink:0;
}

/* ============ 最新信息 CMS ============ */
.news-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:40px;
  flex-wrap:wrap;
}
.news-head h2{font-size:clamp(1.5rem,2.6vw,2.1rem);margin-bottom:10px;}
.news-head p{font-size:15px;color:var(--t2);max-width:560px;}
.news-layout{
  display:grid;
  grid-template-columns:1.25fr 1fr;
  gap:24px;
  align-items:start;
}
.news-feature{
  display:block;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--glass);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  transition:all var(--ease);
}
.news-feature:hover,.news-feature:focus-visible{
  transform:translateY(-3px);
  border-color:rgba(77,139,255,.35);
  box-shadow:0 28px 64px -28px rgba(0,0,0,.9),0 0 0 1px rgba(77,139,255,.35);
  outline:none;
}
.news-feature .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;}
.news-feature .thumb img{width:100%;height:100%;object-fit:cover;}
.news-feature .thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,.1),rgba(5,8,15,.7));
}
.news-feature .body{padding:24px;}
.news-feature h3{font-size:21px;margin:12px 0 10px;transition:color var(--ease);}
.news-feature:hover h3{color:var(--accent);}
.news-feature p{font-size:14px;color:var(--t2);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-list{display:flex;flex-direction:column;gap:14px;}
.news-item{
  display:block;
  padding:20px 22px;
  border-radius:14px;
  background:rgba(120,160,255,.04);
  border:1px solid var(--line);
  position:relative;
  transition:all var(--ease);
}
.news-item::before{
  content:"";
  position:absolute;left:0;top:18px;bottom:18px;
  width:2px;border-radius:2px;
  background:var(--accent);
  opacity:0;
  transition:opacity var(--ease);
}
.news-item:hover,.news-item:focus-visible{
  background:rgba(47,111,237,.1);
  border-color:rgba(77,139,255,.35);
  outline:none;
  transform:translateX(2px);
}
.news-item:hover::before,.news-item:focus-visible::before{opacity:1;}
.news-item h3{font-size:17px;font-weight:600;margin:8px 0 6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:color var(--ease);}
.news-item:hover h3{color:var(--accent);}
.news-item p{
  font-size:13px;color:var(--t3);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.meta-row{
  display:flex;align-items:center;gap:12px;
  font-size:12px;color:var(--t3);
  flex-wrap:wrap;
}
.tag-pill{
  display:inline-block;
  font-size:11px;
  letter-spacing:.04em;
  padding:3px 10px;
  border-radius:999px;
  color:var(--warm);
  background:rgba(255,184,107,.1);
  border:1px solid rgba(255,184,107,.28);
}
.news-more{margin-top:26px;}
.empty-state{
  min-height:200px;
  display:flex;flex-direction:column;
  align-items:center;justify-content:center;
  gap:14px;
  text-align:center;
  padding:36px 24px;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.empty-state svg{width:34px;height:34px;color:var(--t3);}
.empty-state p{font-size:15px;color:var(--t2);}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{
  border-radius:14px;
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  transition:all var(--ease);
  overflow:hidden;
}
.faq-item.open{border-color:rgba(77,139,255,.4);}
.faq-q{
  width:100%;
  display:flex;align-items:center;gap:16px;
  padding:20px 22px;
  background:transparent;
  border:none;
  text-align:left;
  cursor:pointer;
  color:var(--t1);
  font-size:17px;font-weight:600;
  line-height:1.5;
  transition:color var(--ease);
}
.faq-q:hover{color:var(--accent);}
.faq-q:focus-visible{outline:2px solid var(--accent);outline-offset:-3px;}
.faq-idx{
  font-size:12px;font-weight:600;color:var(--t3);
  font-variant-numeric:tabular-nums;
  flex-shrink:0;
  min-width:24px;
}
.faq-sign{
  margin-left:auto;
  width:22px;height:22px;
  position:relative;
  flex-shrink:0;
  color:var(--accent);
}
.faq-sign::before,.faq-sign::after{
  content:"";
  position:absolute;
  background:currentColor;
  border-radius:2px;
  transition:transform var(--ease),opacity var(--ease);
}
.faq-sign::before{left:3px;right:3px;top:50%;height:2px;margin-top:-1px;}
.faq-sign::after{top:3px;bottom:3px;left:50%;width:2px;margin-left:-1px;}
.faq-item.open .faq-sign::after{transform:scaleY(0);opacity:0;}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height 320ms cubic-bezier(.22,.61,.36,1);
}
.faq-a-inner{
  padding:0 22px 22px 62px;
  font-size:15px;
  color:var(--t2);
  line-height:1.9;
}

/* ============ 联系转化 ============ */
.contact-card{
  border-radius:24px;
  background:linear-gradient(160deg,rgba(20,34,66,.9),rgba(8,14,27,.92));
  border:1px solid var(--line);
  box-shadow:0 40px 90px -50px rgba(0,0,0,.95),inset 0 1px 0 rgba(255,255,255,.07);
  padding:52px;
  display:grid;
  grid-template-columns:1fr 0.85fr;
  gap:56px;
  align-items:start;
}
.contact-left h2{font-size:clamp(1.5rem,2.4vw,2rem);margin-bottom:18px;}
.contact-left > p{color:var(--t2);margin-bottom:26px;max-width:440px;}
.contact-points{display:flex;flex-direction:column;gap:14px;margin-bottom:30px;}
.contact-points li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--t2);}
.contact-points li svg{width:18px;height:18px;color:var(--accent);flex-shrink:0;margin-top:5px;}
.contact-line{
  display:flex;flex-wrap:wrap;gap:26px;
  font-size:14px;color:var(--t3);
  padding-top:22px;
  border-top:1px solid rgba(140,170,255,.12);
}
.contact-line strong{display:block;color:var(--t1);font-size:15px;font-weight:600;}
.form-grid{display:flex;flex-direction:column;gap:16px;}
.field label{
  display:block;
  font-size:12px;
  color:var(--t3);
  margin-bottom:7px;
  letter-spacing:.04em;
}
.field label .req{color:var(--accent);margin-left:2px;}
.field input,.field textarea{
  width:100%;
  padding:13px 16px;
  border-radius:var(--r-sm);
  background:rgba(255,255,255,.04);
  border:1px solid rgba(140,170,255,.18);
  color:var(--t1);
  font-size:14px;
  font-family:inherit;
  transition:all var(--ease);
}
.field textarea{resize:vertical;min-height:96px;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:var(--t3);}
.field input:focus,.field textarea:focus{
  outline:none;
  border-color:var(--accent);
  background:rgba(47,224,200,.06);
  box-shadow:0 0 0 3px rgba(47,224,200,.14);
}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.form-note{font-size:12px;color:var(--t3);line-height:1.7;}
.form-msg{
  font-size:13px;
  color:var(--accent);
  min-height:20px;
  display:block;
}
.form-msg.error{color:var(--warm);}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg-2);
  border-top:1px solid rgba(140,170,255,.14);
  padding:72px 0 0;
  margin-top:96px;
  position:relative;
  z-index:2;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:44px;
  padding-bottom:52px;
}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{font-size:14px;color:var(--t2);line-height:1.85;max-width:300px;margin-bottom:20px;}
.footer-contact{font-size:13px;color:var(--t3);line-height:2;}
.footer-contact strong{color:var(--t1);font-weight:600;}
.footer-col h4{font-size:14px;font-weight:600;color:var(--t1);margin-bottom:18px;letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{
  font-size:14px;color:var(--t2);
  transition:color var(--ease);
}
.footer-col a:hover,.footer-col a:focus-visible{color:var(--accent);outline:none;}
.footer-bottom{
  border-top:1px solid rgba(140,170,255,.1);
  padding:22px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  flex-wrap:wrap;
  font-size:13px;color:var(--t3);
}
.footer-bottom a{color:var(--t3);transition:color var(--ease);}
.footer-bottom a:hover{color:var(--accent);}
.to-top{
  width:40px;height:40px;border-radius:50%;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.04);
  display:flex;align-items:center;justify-content:center;
  color:var(--t1);
  cursor:pointer;
  transition:all var(--ease);
}
.to-top:hover,.to-top:focus-visible{
  border-color:var(--primary-2);
  background:rgba(47,111,237,.2);
  box-shadow:0 0 0 3px rgba(47,111,237,.2);
  outline:none;
}

/* ============ 响应式 ============ */
@media (max-width:1100px){
  .nav-links{gap:18px;}
  .svc-layout{grid-template-columns:1fr;gap:34px;}
  .svc-intro{position:static;}
  .hero-grid{grid-template-columns:1fr;gap:44px;}
  .hero-visual{max-width:560px;}
  .float-card.fc-a{left:8px;}
  .float-card.fc-b{right:8px;}
  .contact-card{grid-template-columns:1fr;gap:38px;padding:40px;}
}
@media (max-width:1024px){
  .nav-links{display:none;}
  .nav-actions .btn-main{display:none;}
  .menu-toggle{display:flex;}
  .section{padding:72px 0;}
  .case-grid{grid-template-columns:1fr 1fr;}
  .case-card.big{grid-row:span 1;grid-column:1/-1;min-height:340px;}
  .case-card.wide{grid-column:1/-1;}
  .stats-grid{grid-template-columns:1fr 1fr;gap:34px 0;}
  .stat-item:nth-child(3){border-left:none;padding-left:0;}
  .plan-row{gap:36px;}
  .news-layout{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .hero{padding:120px 0 64px;}
  .hero-sub{font-size:16px;}
  .hero-metrics{gap:16px;font-size:12px;}
  .section{padding:56px 0;}
  .section-tight{padding:48px 0;}
  .svc-grid{grid-template-columns:1fr;}
  .svc-card.wide{grid-column:auto;}
  .plan-row{grid-template-columns:1fr;gap:24px;margin-bottom:48px;}
  .plan-row.reverse .plan-media{order:0;}
  .case-grid{grid-template-columns:1fr;}
  .case-card{min-height:240px;}
  .contact-card{padding:28px 22px;}
  .faq-a-inner{padding-left:22px;}
  .form-row-2{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .site-footer{margin-top:64px;padding-top:56px;}
  .btn-main,.btn-ghost{width:100%;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .float-card{padding:11px 14px;}
  .float-card .fc-value{font-size:18px;}
}
@media (max-width:520px){
  .field-row{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:1fr;gap:0;}
  .stat-item{border-left:none;padding:18px 0;border-top:1px solid rgba(140,170,255,.12);}
  .stat-item:first-child{border-top:none;padding-top:0;}
  .hero-metrics .divider{display:none;}
  .news-feature h3{font-size:18px;}
  .float-card.fc-b{display:none;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
    --bg-0:#05080F;
    --bg-1:#080E1B;
    --bg-2:#0D1730;
    --glass:rgba(120,160,255,.055);
    --line:rgba(140,170,255,.14);
    --primary:#2F6FED;
    --primary-2:#4D8BFF;
    --primary-3:#1B4BB8;
    --accent:#2FE0C8;
    --warm:#FFB86B;
    --t1:#EAF0FF;
    --t2:#A8B6D4;
    --t3:#6C7A99;
    --radius:18px;
    --radius-sm:12px;
    --shadow:0 24px 60px -28px rgba(0,0,0,.85);
    --ease:cubic-bezier(.22,.61,.36,1);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg-0);
    color:var(--t2);
    font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    z-index:0;
    background-image:
      linear-gradient(rgba(140,170,255,.035) 1px,transparent 1px),
      linear-gradient(90deg,rgba(140,170,255,.035) 1px,transparent 1px);
    background-size:48px 48px;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font-family:inherit;}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
  ul,ol{padding:0;list-style:none;}
  a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
    outline:2px solid var(--accent);
    outline-offset:3px;
    border-radius:8px;
  }
  .container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 24px;
    position:relative;
    z-index:1;
  }

  /* ---------- Header ---------- */
  .site-header{
    position:fixed;
    top:0;left:0;right:0;
    z-index:60;
    background:rgba(6,10,20,.35);
    -webkit-backdrop-filter:blur(18px) saturate(150%);
    backdrop-filter:blur(18px) saturate(150%);
    border-bottom:1px solid var(--line);
    transition:background 240ms var(--ease),box-shadow 240ms var(--ease);
  }
  .site-header.is-scrolled{
    background:rgba(5,8,15,.92);
    box-shadow:0 14px 34px -20px rgba(0,0,0,.95);
  }
  .header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:24px;
    height:76px;
    transition:height 240ms var(--ease);
  }
  .site-header.is-scrolled .header-inner{height:64px;}
  .brand{display:inline-flex;align-items:center;gap:10px;flex:none;}
  .brand-mark{
    width:24px;height:24px;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:8px;
    background:linear-gradient(135deg,rgba(47,111,237,.9),rgba(47,224,200,.6));
    color:#05080F;
    flex:none;
  }
  .brand-mark svg{width:16px;height:16px;}
  .brand-text{display:flex;flex-direction:column;line-height:1.1;}
  .brand-main{font-size:18px;font-weight:700;color:var(--t1);letter-spacing:.02em;}
  .brand-sub{font-size:11px;font-weight:500;letter-spacing:.08em;color:var(--t1);opacity:.7;}
  .nav-links{display:flex;align-items:center;gap:26px;}
  .nav-link{
    position:relative;
    font-size:14px;
    color:var(--t2);
    padding:6px 0;
    transition:color 220ms var(--ease);
  }
  .nav-link::after{
    content:"";
    position:absolute;
    left:0;bottom:0;
    width:0;height:2px;
    border-radius:2px;
    background:var(--accent);
    transition:width 240ms var(--ease);
  }
  .nav-link:hover{color:var(--t1);}
  .nav-link:hover::after{width:100%;}
  .nav-link.active{color:var(--t1);font-weight:600;}
  .nav-link.active::after{width:100%;}
  .header-actions{display:flex;align-items:center;gap:12px;flex:none;}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:13px 22px;
    border-radius:var(--radius-sm);
    font-size:15px;font-weight:600;
    border:1px solid transparent;
    cursor:pointer;
    transition:transform 240ms var(--ease),background 240ms var(--ease),box-shadow 240ms var(--ease),border-color 240ms var(--ease),color 240ms var(--ease),filter 240ms var(--ease);
  }
  .btn-sm{padding:9px 16px;font-size:13px;border-radius:10px;}
  .btn-primary{
    background:linear-gradient(135deg,#3B7BFF,#2F6FED);
    color:#fff;
    box-shadow:0 0 0 1px rgba(77,139,255,.55),0 10px 34px -8px rgba(47,111,237,.7);
  }
  .btn-primary:hover{
    transform:translateY(-1px);
    background:linear-gradient(135deg,#4D8BFF,#3B7BFF);
    box-shadow:0 0 0 1px rgba(77,139,255,.85),0 16px 42px -8px rgba(47,111,237,.9);
  }
  .btn-primary:active{transform:translateY(0);filter:brightness(.94);}
  .btn-ghost{
    background:transparent;
    border-color:rgba(255,255,255,.18);
    color:var(--t1);
  }
  .btn-ghost:hover{background:rgba(47,111,237,.16);border-color:var(--primary-2);}
  .btn-ghost:active{transform:translateY(1px);}
  .btn-text{
    display:inline-flex;align-items:center;gap:6px;
    background:none;border:0;padding:4px 0;
    color:var(--primary-2);font-size:14px;font-weight:600;
    cursor:pointer;
    border-bottom:1px solid transparent;
    transition:color 220ms var(--ease),border-color 220ms var(--ease);
  }
  .btn-text svg{width:15px;height:15px;transition:transform 220ms var(--ease);}
  .btn-text:hover{color:var(--accent);border-bottom-color:var(--accent);}
  .btn-text:hover svg{transform:translateX(4px);}
  .nav-toggle{
    display:none;
    width:40px;height:40px;
    align-items:center;justify-content:center;
    background:rgba(120,160,255,.08);
    border:1px solid var(--line);
    border-radius:10px;
    color:var(--t1);
    cursor:pointer;
    transition:background 220ms var(--ease),border-color 220ms var(--ease);
  }
  .nav-toggle:hover{background:rgba(47,111,237,.2);border-color:var(--primary-2);}
  .nav-toggle svg{width:18px;height:18px;}
  .mobile-drawer{
    position:fixed;
    inset:0;
    z-index:55;
    background:rgba(5,8,15,.96);
    -webkit-backdrop-filter:blur(20px);
    backdrop-filter:blur(20px);
    padding:96px 24px 32px;
    display:flex;
    flex-direction:column;
    gap:4px;
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity 240ms var(--ease),transform 240ms var(--ease),visibility 240ms;
  }
  .mobile-drawer.open{opacity:1;visibility:visible;transform:translateY(0);}
  .mobile-drawer a.drawer-link{
    font-size:18px;
    color:var(--t1);
    padding:16px 0;
    border-bottom:1px solid rgba(140,170,255,.1);
    transition:color 200ms var(--ease);
  }
  .mobile-drawer a.drawer-link:hover{color:var(--accent);}
  .mobile-drawer .btn{margin-top:24px;width:100%;}

  /* ---------- Page shell ---------- */
  main{position:relative;z-index:1;}
  .article-hero{
    position:relative;
    padding:132px 0 44px;
    overflow:hidden;
    background:
      radial-gradient(60% 70% at 12% 0%,rgba(47,111,237,.22),transparent 62%),
      radial-gradient(45% 60% at 92% 18%,rgba(47,224,200,.10),transparent 60%),
      linear-gradient(180deg,var(--bg-1),var(--bg-0) 88%);
    border-bottom:1px solid rgba(140,170,255,.08);
  }
  .breadcrumb{
    display:flex;align-items:center;gap:8px;
    font-size:13px;color:var(--t3);
    margin-bottom:22px;
    overflow-x:auto;
    white-space:nowrap;
    scrollbar-width:none;
  }
  .breadcrumb::-webkit-scrollbar{display:none;}
  .breadcrumb a{color:var(--t3);transition:color 200ms var(--ease);}
  .breadcrumb a:hover{color:var(--primary-2);}
  .breadcrumb .sep{color:rgba(108,122,153,.65);}
  .breadcrumb .current{
    color:var(--t1);
    max-width:320px;
    overflow:hidden;
    text-overflow:ellipsis;
    white-space:nowrap;
  }
  .article-hero h1{
    font-size:clamp(1.65rem,3.4vw,2.5rem);
    line-height:1.32;
    font-weight:700;
    color:var(--t1);
    max-width:900px;
    letter-spacing:-.01em;
  }
  .meta-row{
    display:flex;flex-wrap:wrap;align-items:center;gap:14px;
    margin-top:22px;
    font-size:13px;
    color:var(--t3);
  }
  .tag-pill{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 12px;
    border-radius:999px;
    font-size:12px;
    font-weight:600;
    color:var(--warm);
    background:rgba(255,184,107,.1);
    border:1px solid rgba(255,184,107,.28);
  }
  .meta-dot{width:3px;height:3px;border-radius:50%;background:rgba(108,122,153,.6);}
  .share-group{display:flex;align-items:center;gap:8px;margin-left:auto;}
  .share-btn{
    width:34px;height:34px;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:50%;
    background:var(--glass);
    border:1px solid var(--line);
    color:var(--t2);
    cursor:pointer;
    transition:color 220ms var(--ease),border-color 220ms var(--ease),background 220ms var(--ease),transform 220ms var(--ease);
  }
  .share-btn svg{width:15px;height:15px;}
  .share-btn:hover{color:var(--accent);border-color:rgba(47,224,200,.5);background:rgba(47,224,200,.1);transform:translateY(-1px);}
  .share-btn:active{transform:translateY(0);}
  .share-tip{font-size:12px;color:var(--accent);opacity:0;transition:opacity 220ms var(--ease);}
  .share-tip.show{opacity:1;}

  /* ---------- Article layout ---------- */
  .article-wrap{padding:56px 0 88px;background:var(--bg-0);}
  .article-shell{
    display:grid;
    grid-template-columns:minmax(0,1fr) 320px;
    gap:56px;
    align-items:start;
  }
  .article-body{
    min-width:0;
    background:linear-gradient(180deg,rgba(120,160,255,.05),rgba(120,160,255,.015));
    border:1px solid var(--line);
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    padding:44px 44px 40px;
    position:relative;
  }
  .article-body::before{
    content:"";
    position:absolute;top:0;left:24px;right:24px;height:1px;
    background:linear-gradient(90deg,transparent,rgba(255,255,255,.16),transparent);
  }
  .prose{
    color:var(--t2);
    font-size:17px;
    line-height:1.95;
    max-width:760px;
  }
  .prose > * + *{margin-top:1.2em;}
  .prose h2{
    position:relative;
    margin-top:2.3em;
    padding-left:14px;
    color:var(--t1);
    font-size:clamp(1.3rem,2vw,1.62rem);
    font-weight:700;
    line-height:1.4;
  }
  .prose h2::before{
    content:"";
    position:absolute;
    left:0;top:.22em;bottom:.22em;
    width:3px;border-radius:2px;
    background:var(--accent);
  }
  .prose h3{
    margin-top:1.9em;
    color:var(--t1);
    font-size:1.14rem;
    font-weight:600;
    line-height:1.5;
  }
  .prose p{color:var(--t2);}
  .prose strong{color:var(--t1);font-weight:600;}
  .prose em{color:var(--accent);font-style:normal;}
  .prose a{color:var(--primary-2);text-decoration:underline;text-underline-offset:3px;transition:color 200ms var(--ease);}
  .prose a:hover{color:var(--accent);}
  .prose ul{list-style:none;padding-left:1.4em;}
  .prose ul > li{position:relative;}
  .prose ul > li + li{margin-top:.5em;}
  .prose ul > li::before{
    content:"";
    position:absolute;
    left:-1.05em;top:.82em;
    width:6px;height:6px;
    border-radius:2px;
    background:var(--accent);
  }
  .prose ol{list-style:decimal;padding-left:1.6em;}
  .prose ol > li + li{margin-top:.5em;}
  .prose ol > li::marker{color:var(--accent);font-weight:700;}
  .prose blockquote{
    margin:1.8em 0;
    padding:18px 22px;
    border-left:3px solid var(--accent);
    border-radius:0 10px 10px 0;
    background:rgba(120,160,255,.055);
    color:var(--t2);
    font-size:16px;
  }
  .prose blockquote p{margin:0;color:var(--t2);}
  .prose img{
    width:100%;
    border-radius:12px;
    margin:1.6em 0;
    aspect-ratio:16/9;
    object-fit:cover;
  }
  .prose figure{margin:1.8em 0;}
  .prose figcaption{
    margin-top:10px;
    font-size:13px;
    color:var(--t3);
    text-align:center;
  }
  .prose hr{
    border:0;
    height:1px;
    background:rgba(140,170,255,.14);
    margin:2.2em 0;
  }
  .prose table{
    width:100%;
    border-collapse:collapse;
    font-size:14.5px;
    margin:1.6em 0;
    border:1px solid rgba(140,170,255,.16);
    border-radius:10px;
    overflow:hidden;
  }
  .prose th,.prose td{
    padding:11px 14px;
    border-bottom:1px solid rgba(140,170,255,.12);
    text-align:left;
    color:var(--t2);
  }
  .prose th{background:rgba(120,160,255,.07);color:var(--t1);font-weight:600;}
  .prose tbody tr:nth-child(even){background:rgba(120,160,255,.025);}
  .prose code{
    background:rgba(120,160,255,.1);
    border:1px solid rgba(140,170,255,.16);
    border-radius:6px;
    padding:2px 6px;
    font-size:.9em;
    color:var(--t1);
  }

  /* ---------- Empty state ---------- */
  .empty-state{
    text-align:center;
    padding:64px 24px;
    border-radius:var(--radius);
    background:rgba(120,160,255,.05);
    border:1px solid var(--line);
    min-height:280px;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:14px;
  }
  .empty-state .empty-icon{
    width:52px;height:52px;
    border-radius:14px;
    display:flex;align-items:center;justify-content:center;
    background:rgba(47,111,237,.16);
    border:1px solid rgba(77,139,255,.3);
    color:var(--primary-2);
  }
  .empty-state .empty-icon svg{width:24px;height:24px;}
  .empty-state h2{font-size:20px;color:var(--t1);font-weight:700;}
  .empty-state p{font-size:15px;color:var(--t2);max-width:420px;}

  /* ---------- Sidebar ---------- */
  .side{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px;}
  .side-card{
    border-radius:var(--radius);
    background:linear-gradient(180deg,rgba(120,160,255,.06),rgba(120,160,255,.02));
    border:1px solid var(--line);
    box-shadow:var(--shadow);
    padding:24px 22px;
  }
  .side-card h4{
    display:flex;align-items:center;gap:8px;
    font-size:14px;
    font-weight:600;
    color:var(--t1);
    letter-spacing:.02em;
    margin-bottom:16px;
  }
  .side-card h4::before{
    content:"";
    width:4px;height:14px;border-radius:2px;
    background:var(--accent);
  }
  .side-list li + li{margin-top:2px;}
  .side-list a{
    display:flex;align-items:center;justify-content:space-between;gap:10px;
    padding:10px 10px;
    border-radius:10px;
    font-size:14px;
    color:var(--t2);
    transition:background 200ms var(--ease),color 200ms var(--ease),padding-left 200ms var(--ease);
  }
  .side-list a svg{width:14px;height:14px;opacity:.5;transition:transform 200ms var(--ease),opacity 200ms var(--ease);}
  .side-list a:hover{background:rgba(47,111,237,.14);color:var(--t1);padding-left:14px;}
  .side-list a:hover svg{transform:translateX(3px);opacity:1;color:var(--accent);}
  .side-info dt{font-size:12px;color:var(--t3);margin-top:12px;}
  .side-info dt:first-child{margin-top:0;}
  .side-info dd{margin:4px 0 0;font-size:14px;color:var(--t1);word-break:break-word;}
  .side-note{font-size:13.5px;color:var(--t2);line-height:1.85;margin-bottom:16px;}
  .side-note strong{color:var(--t1);}

  /* ---------- Footer of article ---------- */
  .article-footer{
    margin-top:36px;
    padding-top:26px;
    border-top:1px solid rgba(140,170,255,.14);
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  }
  .tag-group{display:flex;flex-wrap:wrap;gap:8px;}
  .tag-item{
    display:inline-flex;align-items:center;
    padding:6px 12px;
    border-radius:999px;
    font-size:12.5px;
    color:var(--t2);
    background:rgba(120,160,255,.07);
    border:1px solid rgba(140,170,255,.16);
    transition:color 200ms var(--ease),border-color 200ms var(--ease),background 200ms var(--ease);
  }
  .tag-item:hover{color:var(--accent);border-color:rgba(47,224,200,.45);background:rgba(47,224,200,.08);}

  /* ---------- Next steps ---------- */
  .next-section{padding:0 0 88px;}
  .next-head{
    display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
    margin-bottom:28px;
    flex-wrap:wrap;
  }
  .next-head h2{
    font-size:clamp(1.4rem,2.4vw,1.9rem);
    color:var(--t1);
    font-weight:700;
    line-height:1.35;
  }
  .next-head p{font-size:14.5px;color:var(--t3);margin-top:8px;}
  .next-grid{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:20px;
  }
  .next-card{
    display:block;
    border-radius:var(--radius);
    background:linear-gradient(180deg,rgba(120,160,255,.06),rgba(120,160,255,.02));
    border:1px solid var(--line);
    overflow:hidden;
    transition:transform 260ms var(--ease),border-color 260ms var(--ease),box-shadow 260ms var(--ease);
  }
  .next-card:hover{
    transform:translateY(-3px);
    border-color:rgba(77,139,255,.35);
    box-shadow:0 0 0 1px rgba(77,139,255,.35),var(--shadow);
  }
  .next-card .thumb{
    position:relative;
    aspect-ratio:16/9;
    overflow:hidden;
  }
  .next-card .thumb img{
    width:100%;height:100%;
    object-fit:cover;
    transition:transform 500ms var(--ease);
  }
  .next-card:hover .thumb img{transform:scale(1.04);}
  .next-card .thumb::after{
    content:"";
    position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(5,8,15,.15),rgba(5,8,15,.82));
  }
  .next-card .card-body{padding:20px 22px 22px;}
  .next-card h3{font-size:16px;color:var(--t1);font-weight:600;line-height:1.5;}
  .next-card p{font-size:13.5px;color:var(--t3);margin-top:8px;line-height:1.75;}
  .next-card .card-link{
    display:inline-flex;align-items:center;gap:6px;
    margin-top:14px;
    font-size:13px;font-weight:600;color:var(--primary-2);
  }
  .next-card .card-link svg{width:14px;height:14px;transition:transform 220ms var(--ease);}
  .next-card:hover .card-link svg{transform:translateX(4px);}
  .next-card:hover .card-link{color:var(--accent);}

  /* ---------- CTA ---------- */
  .cta-section{padding:0 0 96px;}
  .cta-panel{
    position:relative;
    overflow:hidden;
    border-radius:24px;
    border:1px solid rgba(140,170,255,.18);
    background:
      radial-gradient(60% 120% at 0% 0%,rgba(47,111,237,.3),transparent 60%),
      radial-gradient(50% 100% at 96% 90%,rgba(47,224,200,.14),transparent 62%),
      linear-gradient(180deg,var(--bg-2),var(--bg-1));
    padding:52px 48px;
    display:grid;
    grid-template-columns:1.15fr .85fr;
    gap:40px;
    align-items:center;
    box-shadow:var(--shadow);
  }
  .cta-panel h2{
    font-size:clamp(1.45rem,2.6vw,2rem);
    color:var(--t1);
    font-weight:700;
    line-height:1.35;
  }
  .cta-panel p{margin-top:14px;font-size:15px;color:var(--t2);max-width:520px;}
  .cta-points{margin-top:22px;display:flex;flex-direction:column;gap:10px;}
  .cta-points li{
    display:flex;align-items:flex-start;gap:10px;
    font-size:14px;color:var(--t2);
  }
  .cta-points li svg{width:16px;height:16px;color:var(--accent);flex:none;margin-top:4px;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;}
  .cta-actions .btn{min-width:150px;}

  /* ---------- Footer ---------- */
  .site-footer{
    position:relative;
    z-index:1;
    background:var(--bg-2);
    border-top:1px solid rgba(140,170,255,.16);
    padding:64px 0 0;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.6fr 1fr 1fr 1fr;
    gap:40px;
    padding-bottom:44px;
  }
  .footer-brand .brand{margin-bottom:16px;}
  .footer-brand p{font-size:14px;color:var(--t2);max-width:340px;line-height:1.9;}
  .footer-contact{margin-top:18px;font-size:13px;color:var(--t3);display:flex;flex-direction:column;gap:6px;}
  .footer-contact strong{color:var(--t2);font-weight:600;}
  .footer-col h4{font-size:14px;font-weight:600;color:var(--t1);margin-bottom:16px;letter-spacing:.03em;}
  .footer-col li + li{margin-top:10px;}
  .footer-col a{font-size:14px;color:var(--t3);transition:color 200ms var(--ease);}
  .footer-col a:hover{color:var(--accent);}
  .footer-bottom{
    border-top:1px solid rgba(140,170,255,.12);
    padding:20px 0 26px;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    flex-wrap:wrap;
    font-size:13px;color:var(--t3);
  }
  .footer-bottom a{color:var(--t2);transition:color 200ms var(--ease);}
  .footer-bottom a:hover{color:var(--accent);}
  .to-top{
    width:40px;height:40px;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:50%;
    background:rgba(120,160,255,.08);
    border:1px solid var(--line);
    color:var(--t2);
    cursor:pointer;
    transition:color 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease),transform 220ms var(--ease);
  }
  .to-top svg{width:16px;height:16px;}
  .to-top:hover{color:var(--accent);border-color:rgba(47,224,200,.55);box-shadow:0 0 18px -4px rgba(47,224,200,.6);transform:translateY(-2px);}
  .to-top:active{transform:translateY(0);}

  /* ---------- Responsive ---------- */
  @media (max-width:1024px){
    .nav-links{display:none;}
    .header-actions .btn-primary{display:none;}
    .nav-toggle{display:inline-flex;}
    .article-shell{grid-template-columns:1fr;gap:32px;}
    .side{position:static;}
    .article-body{padding:34px 28px;}
    .next-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
    .cta-panel{grid-template-columns:1fr;padding:40px 32px;}
    .cta-actions{justify-content:flex-start;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  }
  @media (max-width:640px){
    .container{padding:0 20px;}
    .article-hero{padding:112px 0 32px;}
    .article-wrap{padding:36px 0 64px;}
    .article-body{padding:26px 20px;border-radius:16px;}
    .prose{font-size:16.5px;line-height:1.95;}
    .meta-row{gap:10px;font-size:12px;}
    .share-group{margin-left:0;width:100%;}
    .next-grid{grid-template-columns:1fr;}
    .next-section,.cta-section{padding-bottom:64px;}
    .cta-panel{padding:32px 22px;border-radius:18px;}
    .cta-actions{flex-direction:column;}
    .cta-actions .btn{width:100%;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
    .article-footer{gap:14px;}
  }
  @media (prefers-reduced-motion:reduce){
    *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
  }

/* roulang page: category1 */
:root{
    --bg-0:#05080F;
    --bg-1:#080E1B;
    --bg-2:#0D1730;
    --glass:rgba(120,160,255,.055);
    --line:rgba(140,170,255,.14);
    --primary:#2F6FED;
    --primary-2:#4D8BFF;
    --primary-3:#1B4BB8;
    --accent:#2FE0C8;
    --warm:#FFB86B;
    --t1:#EAF0FF;
    --t2:#A8B6D4;
    --t3:#6C7A99;
    --radius:18px;
    --radius-sm:12px;
    --shadow:0 24px 60px -28px rgba(0,0,0,.85);
    --ease:240ms cubic-bezier(.22,.61,.36,1);
    --font-cn:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    font-family:var(--font-cn);
    background:var(--bg-0);
    color:var(--t2);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    z-index:0;
    background-image:
      linear-gradient(rgba(140,170,255,.035) 1px,transparent 1px),
      linear-gradient(90deg,rgba(140,170,255,.035) 1px,transparent 1px);
    background-size:48px 48px;
  }
  img{max-width:100%;display:block;border:0}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit;cursor:pointer}
  h1,h2,h3,h4,p,ul,ol{margin:0}
  ul{list-style:none;padding:0}
  :focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}

  .shell{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}

  /* ---------- 导航 ---------- */
  .site-header{
    position:fixed;top:0;left:0;right:0;z-index:80;
    background:rgba(6,10,20,.35);
    backdrop-filter:blur(18px) saturate(150%);
    -webkit-backdrop-filter:blur(18px) saturate(150%);
    border-bottom:1px solid rgba(140,170,255,.12);
    transition:background var(--ease),height var(--ease),box-shadow var(--ease);
  }
  .site-header.scrolled{
    background:rgba(5,8,15,.92);
    box-shadow:0 18px 40px -30px rgba(0,0,0,.95);
  }
  .nav-inner{
    height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px;
    transition:height var(--ease);
  }
  .site-header.scrolled .nav-inner{height:64px}
  .brand{display:inline-flex;align-items:center;gap:10px;color:var(--t1);flex-shrink:0}
  .brand-mark{
    width:24px;height:24px;border-radius:7px;display:inline-flex;align-items:center;justify-content:center;
    background:linear-gradient(140deg,rgba(77,139,255,.9),rgba(47,224,200,.55));
    color:#04101f;flex-shrink:0;
  }
  .brand-mark svg{width:17px;height:17px}
  .brand-text{display:flex;flex-direction:column;line-height:1.15}
  .brand-main{font-size:18px;font-weight:700;letter-spacing:.02em}
  .brand-sub{font-size:11px;font-weight:500;letter-spacing:.08em;opacity:.7;margin-top:2px}
  .nav-links{display:flex;align-items:center;gap:26px;flex-wrap:nowrap}
  .nav-link{
    font-size:14px;color:var(--t2);position:relative;padding:6px 0;white-space:nowrap;
    transition:color var(--ease);
  }
  .nav-link::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
    background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform var(--ease);
  }
  .nav-link:hover,.nav-link:focus-visible{color:var(--t1)}
  .nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
  .nav-link.active{color:var(--t1);font-weight:600}
  .nav-link.active::after{transform:scaleX(1)}
  .nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:var(--radius-sm);font-size:15px;font-weight:600;
    padding:12px 22px;border:1px solid transparent;
    transition:transform var(--ease),background var(--ease),border-color var(--ease),box-shadow var(--ease),color var(--ease);
  }
  .btn-primary{
    color:#fff;
    background:linear-gradient(135deg,#3B7BFF,#2F6FED);
    box-shadow:0 0 0 1px rgba(77,139,255,.55),0 10px 34px -8px rgba(47,111,237,.7);
  }
  .btn-primary:hover{transform:translateY(-1px);background:linear-gradient(135deg,#4D8BFF,#3B7BFF);box-shadow:0 0 0 1px rgba(77,139,255,.8),0 14px 40px -8px rgba(47,111,237,.85)}
  .btn-primary:active{transform:translateY(0);filter:brightness(.94)}
  .btn-ghost{
    color:var(--t1);background:transparent;border:1px solid rgba(255,255,255,.18);
  }
  .btn-ghost:hover{background:rgba(47,111,237,.16);border-color:var(--primary-2)}
  .btn-ghost:active{background:rgba(47,111,237,.24)}
  .btn-text{
    display:inline-flex;align-items:center;gap:8px;color:var(--primary-2);
    font-size:14px;font-weight:600;padding:4px 0;position:relative;background:none;border:0;
  }
  .btn-text svg{transition:transform var(--ease)}
  .btn-text::after{
    content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;background:var(--accent);
    transform:scaleX(0);transform-origin:left;transition:transform var(--ease);
  }
  .btn-text:hover{color:var(--accent)}
  .btn-text:hover::after{transform:scaleX(1)}
  .btn-text:hover svg{transform:translateX(4px)}
  .nav-cta{padding:10px 18px;font-size:14px}
  .menu-toggle{
    display:none;width:42px;height:42px;border-radius:12px;border:1px solid rgba(255,255,255,.18);
    background:rgba(120,160,255,.08);color:var(--t1);align-items:center;justify-content:center;
    transition:background var(--ease),border-color var(--ease);
  }
  .menu-toggle:hover{background:rgba(47,111,237,.22);border-color:var(--primary-2)}
  .menu-toggle svg{width:20px;height:20px}

  .nav-drawer{
    position:fixed;inset:0;z-index:90;
    background:rgba(5,8,15,.97);
    backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);
    display:flex;flex-direction:column;
    padding:88px 24px 28px;
    transform:translateY(-102%);opacity:0;visibility:hidden;
    transition:transform 320ms cubic-bezier(.22,.61,.36,1),opacity 320ms ease,visibility 320ms;
  }
  .nav-drawer.open{transform:translateY(0);opacity:1;visibility:visible}
  .drawer-close{
    position:absolute;top:20px;right:20px;width:42px;height:42px;border-radius:12px;
    border:1px solid rgba(255,255,255,.18);background:rgba(120,160,255,.08);color:var(--t1);
    display:inline-flex;align-items:center;justify-content:center;
  }
  .drawer-close:hover{background:rgba(47,111,237,.22);border-color:var(--primary-2)}
  .drawer-links{display:flex;flex-direction:column;gap:4px;margin-bottom:auto}
  .drawer-links a{
    font-size:18px;color:var(--t1);padding:16px 0;border-bottom:1px solid rgba(140,170,255,.12);
  }
  .drawer-links a:hover,.drawer-links a:focus-visible{color:var(--accent)}
  .drawer-links a.active{color:var(--accent);font-weight:600}
  .drawer-foot{padding-top:20px}
  .drawer-foot .btn{width:100%}

  /* ---------- Hero ---------- */
  .page-hero{
    position:relative;
    padding:150px 0 64px;
    overflow:hidden;
    background:
      radial-gradient(60% 70% at 12% 8%,rgba(47,111,237,.20),transparent 62%),
      radial-gradient(45% 60% at 92% 88%,rgba(47,224,200,.10),transparent 60%),
      linear-gradient(180deg,var(--bg-1),var(--bg-0));
  }
  .page-hero::after{
    content:"";position:absolute;inset:0;pointer-events:none;
    background:linear-gradient(180deg,rgba(5,8,15,0) 55%,rgba(5,8,15,.92) 100%);
  }
  .breadcrumbs{
    display:flex;gap:8px;align-items:center;font-size:13px;color:var(--t3);
    white-space:nowrap;overflow-x:auto;margin-bottom:22px;position:relative;z-index:2;
  }
  .breadcrumbs a{color:var(--t3);transition:color var(--ease)}
  .breadcrumbs a:hover{color:var(--primary-2)}
  .breadcrumbs span.cur{color:var(--t1)}
  .hero-grid{
    display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);
    gap:48px;align-items:center;position:relative;z-index:2;
  }
  .eyebrow{
    display:inline-flex;align-items:center;gap:10px;
    padding:7px 16px;border-radius:999px;
    background:var(--glass);border:1px solid var(--line);
    font-size:13px;color:var(--t2);margin-bottom:22px;
    box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  }
  .eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block;flex-shrink:0}
  h1{
    font-size:clamp(2rem,4.4vw,3.1rem);line-height:1.18;color:var(--t1);font-weight:700;
    letter-spacing:-.01em;
  }
  .hero-sub{font-size:17px;line-height:1.9;color:var(--t2);max-width:600px;margin-top:18px}
  .hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
  .pill{
    display:inline-flex;align-items:center;gap:8px;
    padding:8px 16px;border-radius:999px;font-size:13px;
    background:var(--glass);border:1px solid var(--line);color:var(--t2);
  }
  .pill b{color:var(--accent);font-weight:700;font-variant-numeric:tabular-nums}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
  .hero-visual{position:relative}
  .hero-visual img{
    width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:20px;
    border:1px solid var(--line);
    box-shadow:var(--shadow);
  }
  .hero-visual::after{
    content:"";position:absolute;inset:0;border-radius:20px;pointer-events:none;
    background:linear-gradient(180deg,rgba(5,8,15,.15),rgba(5,8,15,.82));
  }
  .float-card{
    position:absolute;z-index:3;
    background:rgba(10,18,36,.86);border:1px solid var(--line);border-radius:14px;
    padding:14px 16px;backdrop-filter:blur(12px);box-shadow:var(--shadow);
  }
  .float-card .fc-label{font-size:11px;letter-spacing:.08em;color:var(--t3);text-transform:uppercase}
  .float-card .fc-value{font-size:20px;font-weight:700;color:var(--t1);font-variant-numeric:tabular-nums;margin-top:2px}
  .float-card .fc-note{font-size:12px;color:var(--t3);margin-top:2px}
  .fc-1{left:-16px;bottom:26px}
  .fc-2{right:-10px;top:22px}

  /* ---------- 通用板块 ---------- */
  .section{padding:88px 0;position:relative}
  .section.alt{background:var(--bg-1);border-top:1px solid rgba(140,170,255,.08);border-bottom:1px solid rgba(140,170,255,.08)}
  .sec-head{max-width:720px;margin-bottom:44px}
  .sec-tag{
    display:inline-block;font-size:12px;letter-spacing:.14em;color:var(--accent);
    margin-bottom:14px;text-transform:uppercase;
  }
  h2{font-size:clamp(1.5rem,2.6vw,2.1rem);line-height:1.24;color:var(--t1);font-weight:700}
  .sec-desc{margin-top:16px;font-size:16px;line-height:1.9;color:var(--t2);max-width:640px}

  /* ---------- 入口路径：锚点 + 编号清单 ---------- */
  .guide-layout{display:grid;grid-template-columns:minmax(0,240px) minmax(0,1fr);gap:48px;align-items:start}
  .anchor-nav{
    position:sticky;top:96px;
    border-left:1px solid rgba(140,170,255,.16);
    padding-left:2px;
  }
  .anchor-nav a{
    display:block;padding:10px 0 10px 18px;font-size:14px;color:var(--t3);
    position:relative;transition:color var(--ease),background var(--ease);border-radius:0 8px 8px 0;
  }
  .anchor-nav a::before{
    content:"";position:absolute;left:-1px;top:8px;bottom:8px;width:2px;border-radius:2px;
    background:var(--accent);opacity:0;transition:opacity var(--ease);
  }
  .anchor-nav a:hover,.anchor-nav a:focus-visible{color:var(--t1);background:rgba(120,160,255,.06)}
  .anchor-nav a.active{color:var(--t1);font-weight:600}
  .anchor-nav a.active::before{opacity:1}
  .anchor-title{font-size:12px;letter-spacing:.14em;color:var(--t3);margin-bottom:12px;padding-left:18px}

  .step-list{border-top:1px solid rgba(140,170,255,.14)}
  .step-item{
    display:grid;grid-template-columns:72px minmax(0,1fr) 32px;
    gap:20px;align-items:start;
    padding:28px 20px 28px 4px;
    border-bottom:1px solid rgba(140,170,255,.14);
    transition:background var(--ease);
    border-radius:10px;
  }
  .step-item:hover{background:rgba(120,160,255,.055)}
  .step-num{
    font-size:30px;font-weight:700;line-height:1;color:transparent;
    -webkit-text-stroke:1px rgba(140,170,255,.5);
    font-variant-numeric:tabular-nums;letter-spacing:.02em;
  }
  .step-item:hover .step-num{-webkit-text-stroke-color:var(--accent)}
  .step-body h3{font-size:20px;color:var(--t1);font-weight:600;margin-bottom:10px;line-height:1.4}
  .step-body p{font-size:15px;line-height:1.9;color:var(--t2);max-width:620px}
  .step-body .step-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
  .tag{
    font-size:12px;padding:4px 10px;border-radius:999px;
    background:rgba(47,224,200,.08);border:1px solid rgba(47,224,200,.24);color:var(--accent);
  }
  .tag.warm{background:rgba(255,184,107,.08);border-color:rgba(255,184,107,.28);color:var(--warm)}
  .step-arrow{color:var(--t3);display:flex;align-items:center;justify-content:flex-end;padding-top:6px;transition:color var(--ease),transform var(--ease)}
  .step-item:hover .step-arrow{color:var(--accent);transform:translateX(4px)}

  /* ---------- 指标条 ---------- */
  .metric-band{
    background:linear-gradient(120deg,var(--bg-2),#0A1226 55%,var(--bg-2));
    border-top:1px solid rgba(140,170,255,.12);border-bottom:1px solid rgba(140,170,255,.12);
    padding:56px 0;
  }
  .metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0}
  .metric{
    padding:6px 26px;border-left:1px solid rgba(140,170,255,.16);
  }
  .metric:first-child{border-left:0;padding-left:0}
  .metric .m-value{
    font-size:36px;font-weight:700;color:var(--accent);line-height:1.1;
    font-variant-numeric:tabular-nums;letter-spacing:-.01em;
  }
  .metric .m-value small{font-size:16px;font-weight:600;margin-left:2px;color:rgba(47,224,200,.8)}
  .metric .m-label{font-size:13px;color:var(--t2);margin-top:8px}
  .metric .m-note{font-size:12px;color:var(--t3);margin-top:2px}

  /* ---------- 流程三步 ---------- */
  .flow-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
  .flow-card{
    background:var(--glass);border:1px solid var(--line);border-radius:var(--radius);
    padding:28px 26px;box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.06);
    transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
    position:relative;
  }
  .flow-card:hover{transform:translateY(-3px);border-color:rgba(77,139,255,.35);box-shadow:0 0 0 1px rgba(77,139,255,.35),var(--shadow)}
  .flow-idx{font-size:12px;letter-spacing:.14em;color:var(--warm);margin-bottom:16px}
  .flow-card h3{font-size:19px;color:var(--t1);font-weight:600;margin-bottom:10px}
  .flow-card p{font-size:14px;line-height:1.9;color:var(--t2)}
  .flow-icon{
    width:40px;height:40px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;
    background:rgba(47,111,237,.14);border:1px solid rgba(77,139,255,.3);color:var(--primary-2);margin-bottom:18px;
  }
  .flow-icon svg{width:20px;height:20px}

  /* ---------- 图文区块 ---------- */
  .split{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:56px;align-items:center}
  .split-media{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
  .split-media img{width:100%;aspect-ratio:16/11;object-fit:cover}
  .split-media::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(5,8,15,.15),rgba(5,8,15,.82));
  }
  .split-media .media-badge{
    position:absolute;left:18px;bottom:18px;z-index:2;
    padding:10px 16px;border-radius:12px;font-size:13px;
    background:rgba(10,18,36,.8);border:1px solid var(--line);color:var(--t1);
    backdrop-filter:blur(10px);
  }
  .check-list{margin-top:26px;display:grid;gap:16px}
  .check-list li{display:grid;grid-template-columns:20px minmax(0,1fr);gap:12px;font-size:15px;line-height:1.85;color:var(--t2)}
  .check-list li .dot{
    width:8px;height:8px;border-radius:50%;background:var(--accent);margin-top:9px;
    box-shadow:0 0 0 4px rgba(47,224,200,.12);
  }
  .check-list li strong{color:var(--t1);font-weight:600}

  /* ---------- 数据卡网格 ---------- */
  .stat-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin-top:40px}
  .stat-card{
    background:var(--glass);border:1px solid var(--line);border-radius:var(--radius);
    padding:24px 24px;box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
    transition:border-color var(--ease),transform var(--ease);
  }
  .stat-card:hover{border-color:rgba(77,139,255,.35);transform:translateY(-2px)}
  .stat-card .sc-top{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
  .stat-card .sc-num{font-size:28px;font-weight:700;color:var(--t1);font-variant-numeric:tabular-nums}
  .stat-card .sc-unit{font-size:12px;color:var(--warm);letter-spacing:.06em}
  .stat-card h4{font-size:15px;color:var(--t1);font-weight:600;margin-top:10px}
  .stat-card p{font-size:13px;line-height:1.8;color:var(--t3);margin-top:6px}

  /* ---------- FAQ ---------- */
  .faq-wrap{max-width:900px}
  .faq-item{
    background:var(--glass);border:1px solid var(--line);border-radius:14px;
    margin-bottom:12px;overflow:hidden;transition:border-color var(--ease),background var(--ease);
  }
  .faq-item:hover{border-color:rgba(77,139,255,.3)}
  .faq-item.open{border-color:rgba(77,139,255,.5);background:rgba(47,111,237,.07)}
  .faq-q{
    width:100%;display:grid;grid-template-columns:34px minmax(0,1fr) 24px;gap:12px;
    align-items:center;text-align:left;background:none;border:0;
    padding:20px 22px;color:var(--t1);font-size:17px;font-weight:600;line-height:1.6;
  }
  .faq-q .fnum{font-size:13px;color:var(--accent);font-variant-numeric:tabular-nums;font-weight:700}
  .faq-icon{
    width:22px;height:22px;border-radius:50%;border:1px solid rgba(140,170,255,.4);
    display:inline-flex;align-items:center;justify-content:center;color:var(--accent);
    transition:transform var(--ease),border-color var(--ease);position:relative;
  }
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;background:currentColor;border-radius:2px;
  }
  .faq-icon::before{width:10px;height:1.5px}
  .faq-icon::after{width:1.5px;height:10px;transition:transform var(--ease),opacity var(--ease)}
  .faq-item.open .faq-icon{transform:rotate(180deg);border-color:var(--accent)}
  .faq-item.open .faq-icon::after{transform:scaleY(0);opacity:0}
  .faq-a{max-height:0;overflow:hidden;transition:max-height 320ms cubic-bezier(.22,.61,.36,1)}
  .faq-a p{padding:0 22px 22px 68px;font-size:15px;line-height:1.95;color:var(--t2)}
  @media (max-width:520px){
    .faq-a p{padding-left:22px}
    .faq-q{grid-template-columns:26px minmax(0,1fr) 22px;font-size:15.5px;padding:18px 16px}
  }

  /* ---------- CTA ---------- */
  .cta-band{padding:0 0 96px}
  .cta-card{
    position:relative;overflow:hidden;border-radius:24px;
    border:1px solid rgba(77,139,255,.28);
    background:
      radial-gradient(70% 130% at 8% 0%,rgba(47,111,237,.28),transparent 62%),
      radial-gradient(50% 120% at 96% 100%,rgba(47,224,200,.16),transparent 60%),
      linear-gradient(160deg,#0A1329,#070C19);
    padding:52px 48px;
    display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:40px;align-items:center;
    box-shadow:var(--shadow);
  }
  .cta-card h2{font-size:clamp(1.4rem,2.4vw,1.95rem)}
  .cta-card p{margin-top:14px;font-size:15px;line-height:1.9;color:var(--t2);max-width:560px}
  .cta-side{display:flex;flex-direction:column;gap:14px}
  .cta-side .btn{width:100%}
  .cta-note{font-size:12.5px;color:var(--t3);text-align:center}

  /* ---------- 页脚 ---------- */
  .site-footer{
    background:var(--bg-2);border-top:1px solid rgba(140,170,255,.14);
    padding:64px 0 0;position:relative;z-index:1;
  }
  .footer-grid{
    display:grid;grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));
    gap:44px;padding-bottom:44px;
  }
  .footer-brand p{font-size:14px;line-height:1.9;color:var(--t3);margin-top:18px;max-width:340px}
  .footer-contact{margin-top:20px;font-size:13px;color:var(--t3);line-height:2}
  .footer-contact strong{color:var(--t2);font-weight:600}
  .footer-col h4{font-size:14px;color:var(--t1);font-weight:600;margin-bottom:16px;letter-spacing:.02em}
  .footer-col ul{display:grid;gap:10px}
  .footer-col a{font-size:13.5px;color:var(--t3);transition:color var(--ease)}
  .footer-col a:hover,.footer-col a:focus-visible{color:var(--accent)}
  .footer-bottom{
    border-top:1px solid rgba(140,170,255,.12);
    padding:22px 0 26px;display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
    font-size:13px;color:var(--t3);
  }
  .footer-bottom a{color:var(--t2);transition:color var(--ease)}
  .footer-bottom a:hover{color:var(--accent)}
  .to-top{
    width:42px;height:42px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
    background:rgba(120,160,255,.08);border:1px solid rgba(255,255,255,.18);color:var(--t1);
    transition:box-shadow var(--ease),background var(--ease),border-color var(--ease);
  }
  .to-top:hover{background:rgba(47,111,237,.22);border-color:var(--primary-2);box-shadow:0 0 0 1px rgba(77,139,255,.5),0 8px 26px -10px rgba(47,111,237,.8)}
  .to-top svg{width:18px;height:18px}

  /* ---------- 响应式 ---------- */
  @media (max-width:1023px){
    .nav-links{display:none}
    .nav-actions .btn-ghost{display:none}
    .menu-toggle{display:inline-flex}
    .hero-grid{grid-template-columns:1fr;gap:36px}
    .hero-visual{max-width:560px}
    .guide-layout{grid-template-columns:1fr;gap:32px}
    .anchor-nav{position:static;display:flex;flex-wrap:wrap;gap:6px;border-left:0;padding-left:0;border-bottom:1px solid rgba(140,170,255,.14);padding-bottom:14px}
    .anchor-nav a{padding:6px 12px;border-radius:999px;font-size:13px;background:rgba(120,160,255,.06);border:1px solid rgba(140,170,255,.14)}
    .anchor-nav a::before{display:none}
    .anchor-title{display:none}
    .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:32px}
    .metric{border-left:0;padding:0}
    .metric:nth-child(odd){border-right:1px solid rgba(140,170,255,.16);padding-right:20px}
    .split{grid-template-columns:1fr;gap:32px}
    .cta-card{grid-template-columns:1fr;padding:40px 32px}
    .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px}
    .section{padding:72px 0}
  }
  @media (max-width:767px){
    .flow-grid{grid-template-columns:1fr}
    .stat-cards{grid-template-columns:1fr}
    .step-item{grid-template-columns:52px minmax(0,1fr);gap:14px;padding:24px 0}
    .step-arrow{display:none}
    .step-num{font-size:24px}
    .page-hero{padding:126px 0 48px}
    .footer-grid{grid-template-columns:1fr;gap:30px}
    .footer-brand p{max-width:none}
  }
  @media (max-width:519px){
    .shell{padding:0 20px}
    .hero-actions .btn{width:100%}
    .fc-1{left:0;bottom:14px;padding:10px 12px}
    .fc-2{right:0;top:14px;padding:10px 12px}
    .float-card .fc-value{font-size:16px}
    .metric .m-value{font-size:28px}
    .cta-card{padding:32px 22px}
    .footer-bottom{flex-direction:column;align-items:flex-start}
    .anchor-nav a{font-size:12.5px;padding:5px 10px}
  }
  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important;scroll-behavior:auto !important}
    .flow-card:hover,.stat-card:hover,.step-item:hover{transform:none}
  }

/* roulang page: category2 */
:root{
  --bg-0:#05080F;
  --bg-1:#080E1B;
  --bg-2:#0D1730;
  --glass:rgba(120,160,255,0.055);
  --line:rgba(140,170,255,0.14);
  --primary:#2F6FED;
  --primary-2:#4D8BFF;
  --primary-3:#1B4BB8;
  --accent:#2FE0C8;
  --warm:#FFB86B;
  --t1:#EAF0FF;
  --t2:#A8B6D4;
  --t3:#6C7A99;
  --radius:18px;
  --radius-sm:12px;
  --shadow-card:0 24px 60px -28px rgba(0,0,0,0.85);
  --ease:240ms cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  background:var(--bg-0);
  color:var(--t2);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:linear-gradient(rgba(140,170,255,0.035) 1px,transparent 1px),linear-gradient(90deg,rgba(140,170,255,0.035) 1px,transparent 1px);
  background-size:48px 48px;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--ease),background var(--ease),border-color var(--ease);}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--t1);font-weight:700;line-height:1.18;letter-spacing:-0.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1;}
.section{padding:96px 0;position:relative;z-index:1;}
.section-tight{padding:72px 0;position:relative;z-index:1;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:var(--glass);border:1px solid var(--line);
  font-size:12.5px;color:var(--t2);letter-spacing:0.06em;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px rgba(47,224,200,.85);}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head h2{font-size:clamp(1.5rem,2.6vw,2.1rem);margin-bottom:14px;}
.section-head p{color:var(--t2);font-size:16px;max-width:640px;}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  background:rgba(6,10,20,0.35);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  backdrop-filter:blur(18px) saturate(150%);
  border-bottom:1px solid rgba(140,170,255,0.10);
  transition:background var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.site-header.scrolled{
  background:rgba(5,8,15,0.9);
  border-bottom-color:rgba(140,170,255,0.16);
  box-shadow:0 18px 40px -30px rgba(0,0,0,0.95);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:76px;transition:height var(--ease);}
.site-header.scrolled .nav-inner{height:64px;}
.brand-link{display:inline-flex;align-items:center;flex:0 0 auto;}
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  width:24px;height:24px;border-radius:7px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--primary-2),var(--primary-3));
  color:#fff;flex:0 0 auto;
  box-shadow:0 0 0 1px rgba(77,139,255,0.5),0 8px 22px -10px rgba(47,111,237,0.9);
}
.brand-mark svg{width:16px;height:16px;}
.brand-text{display:flex;flex-direction:column;line-height:1;}
.brand-main{font-size:18px;font-weight:700;color:var(--t1);letter-spacing:0.01em;}
.brand-sub{font-size:11px;font-weight:500;letter-spacing:0.08em;color:var(--t2);opacity:.7;margin-top:3px;}
.nav-links{display:flex;align-items:center;gap:6px;margin:0 auto;}
.nav-link{
  position:relative;display:inline-block;padding:10px 12px;border-radius:10px;
  font-size:14.5px;color:var(--t2);white-space:nowrap;
  transition:color var(--ease),background var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform var(--ease);
}
.nav-link:hover{color:var(--t1);background:rgba(47,111,237,0.12);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--t1);}
.nav-link.active::after{transform:scaleX(1);background:var(--accent);}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.icon-btn{
  width:38px;height:38px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,255,255,0.16);color:var(--t2);
  background:rgba(255,255,255,0.02);
  transition:all var(--ease);
}
.icon-btn:hover{color:var(--t1);border-color:var(--primary-2);background:rgba(47,111,237,0.16);}
.icon-btn:active{transform:scale(0.96);}
.icon-btn svg{width:17px;height:17px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 24px;border-radius:12px;font-size:15px;font-weight:600;
  transition:all var(--ease);text-align:center;
}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:11px;}
.btn-primary{
  background:linear-gradient(135deg,#3B7BFF,#2F6FED);
  color:#fff;
  box-shadow:0 0 0 1px rgba(77,139,255,0.55),0 10px 34px -8px rgba(47,111,237,0.7);
}
.btn-primary:hover{transform:translateY(-1px);background:linear-gradient(135deg,#4D8BFF,#3B7BFF);box-shadow:0 0 0 1px rgba(77,139,255,0.7),0 16px 40px -8px rgba(47,111,237,0.85);}
.btn-primary:active{transform:translateY(0);filter:brightness(0.94);}
.btn-ghost{
  background:transparent;color:var(--t1);
  border:1px solid rgba(255,255,255,0.18);
}
.btn-ghost:hover{background:rgba(47,111,237,0.16);border-color:var(--primary-2);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);filter:brightness(0.95);}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14.5px;font-weight:600;color:var(--primary-2);
  padding-bottom:2px;border-bottom:1px solid transparent;
  transition:all var(--ease);
}
.link-arrow svg{width:15px;height:15px;transition:transform var(--ease);}
.link-arrow:hover{color:var(--accent);border-bottom-color:var(--accent);}
.link-arrow:hover svg{transform:translateX(4px);}
.menu-btn{display:none;width:40px;height:40px;border-radius:11px;border:1px solid rgba(255,255,255,0.16);align-items:center;justify-content:center;color:var(--t1);}
.menu-btn svg{width:20px;height:20px;}
.mobile-drawer{
  position:fixed;inset:0;z-index:95;
  background:rgba(5,8,15,0.96);
  -webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);
  padding:96px 24px 32px;
  display:flex;flex-direction:column;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
}
.mobile-drawer.open{opacity:1;visibility:visible;transform:translateY(0);}
.mobile-drawer a.m-link{
  display:block;padding:16px 0;font-size:18px;font-weight:600;color:var(--t1);
  border-bottom:1px solid rgba(140,170,255,0.12);
}
.mobile-drawer a.m-link:hover{color:var(--accent);}
.mobile-drawer .m-cta{margin-top:auto;}
.drawer-close{position:absolute;top:24px;right:24px;width:40px;height:40px;border-radius:11px;border:1px solid rgba(255,255,255,0.16);display:flex;align-items:center;justify-content:center;color:var(--t1);}

/* ============ Hero ============ */
.page-hero{
  position:relative;
  padding:150px 0 72px;
  overflow:hidden;
  background:
    radial-gradient(60% 80% at 12% 8%,rgba(47,111,237,0.20),transparent 62%),
    radial-gradient(48% 70% at 92% 78%,rgba(47,224,200,0.10),transparent 60%),
    var(--bg-0);
  border-bottom:1px solid rgba(140,170,255,0.10);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  opacity:0.16;mix-blend-mode:luminosity;
}
.hero-grid{display:grid;grid-template-columns:1fr auto;gap:40px;align-items:end;position:relative;z-index:1;}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t3);margin-bottom:22px;flex-wrap:nowrap;overflow-x:auto;}
.breadcrumb a{color:var(--t3);}
.breadcrumb a:hover{color:var(--primary-2);}
.breadcrumb .sep{color:rgba(108,122,153,0.7);}
.breadcrumb .cur{color:var(--t1);}
.page-hero h1{font-size:clamp(2rem,4.4vw,3.1rem);margin:14px 0 18px;}
.page-hero .lead{font-size:16.5px;color:var(--t2);max-width:620px;line-height:1.9;}
.hero-stat{
  display:flex;gap:14px;flex-wrap:wrap;
}
.stat-pill{
  min-width:132px;padding:16px 18px;border-radius:14px;
  background:var(--glass);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,0.06);
}
.stat-pill strong{display:block;font-size:24px;color:var(--accent);font-variant-numeric:tabular-nums;line-height:1.2;}
.stat-pill span{font-size:12.5px;color:var(--t3);}

/* ============ 长条图文 ============ */
.lane{
  display:grid;grid-template-columns:5fr 6fr;
  gap:clamp(28px,5vw,72px);align-items:center;
  padding:0 0 64px;margin-bottom:64px;
  border-bottom:1px solid rgba(140,170,255,0.10);
}
.lane:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0;}
.lane-rev .lane-media{order:2;}
.lane-media{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--shadow-card);}
.lane-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  transition:transform 600ms var(--ease);
}
.lane-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,0.15),rgba(5,8,15,0.82));
}
.lane-media:hover img{transform:scale(1.03);}
.lane-index{
  position:absolute;left:16px;bottom:14px;z-index:2;
  font-size:13px;letter-spacing:0.18em;color:var(--t1);
  font-variant-numeric:tabular-nums;
  padding:5px 12px;border-radius:999px;
  background:rgba(5,8,15,0.55);border:1px solid rgba(140,170,255,0.22);
}
.tag{
  display:inline-block;padding:5px 12px;border-radius:999px;
  font-size:12px;letter-spacing:0.05em;
  color:var(--warm);background:rgba(255,184,107,0.10);
  border:1px solid rgba(255,184,107,0.28);
}
.lane-body h2{font-size:clamp(1.35rem,2.2vw,1.85rem);margin:16px 0 14px;}
.lane-body p.desc{font-size:15.5px;color:var(--t2);max-width:620px;margin-bottom:20px;}
.point-list{display:flex;flex-direction:column;gap:10px;margin-bottom:24px;}
.point-list li{position:relative;padding-left:20px;font-size:14.8px;color:var(--t2);line-height:1.8;}
.point-list li::before{
  content:"";position:absolute;left:0;top:10px;
  width:7px;height:7px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 10px rgba(47,224,200,0.7);
}

/* ============ 三步自查 ============ */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.step-card{
  padding:28px 24px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,0.06),var(--shadow-card);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.step-card:hover{transform:translateY(-3px);border-color:rgba(77,139,255,0.35);box-shadow:0 0 0 1px rgba(77,139,255,0.35),var(--shadow-card);}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:12px;margin-bottom:18px;
  background:rgba(47,111,237,0.16);border:1px solid rgba(77,139,255,0.35);
  color:var(--primary-2);font-weight:700;font-size:15px;
  font-variant-numeric:tabular-nums;
}
.step-card h3{font-size:19px;margin-bottom:10px;}
.step-card p{font-size:14.6px;color:var(--t2);}

/* ============ 数据带 ============ */
.data-band{
  background:var(--bg-2);
  border-top:1px solid rgba(140,170,255,0.12);
  border-bottom:1px solid rgba(140,170,255,0.12);
  padding:56px 0;position:relative;z-index:1;
}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.data-cell{padding:0 24px;border-left:1px solid rgba(140,170,255,0.14);}
.data-cell:first-child{border-left:none;padding-left:0;}
.data-cell strong{
  display:block;font-size:40px;font-weight:700;line-height:1.15;
  color:var(--accent);font-variant-numeric:tabular-nums;
}
.data-cell span{display:block;margin-top:8px;font-size:13.5px;color:var(--t2);}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;margin:0 auto;}
.faq-list{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:var(--glass);box-shadow:inset 0 1px 0 rgba(255,255,255,0.06);}
.faq-item{border-bottom:1px solid rgba(140,170,255,0.12);transition:background var(--ease);}
.faq-item:last-child{border-bottom:none;}
.faq-item.open{background:rgba(47,111,237,0.07);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 26px;text-align:left;
  color:var(--t1);font-size:17px;font-weight:600;line-height:1.5;
  transition:color var(--ease);
}
.faq-q:hover{color:var(--accent);}
.faq-q .idx{color:var(--t3);font-size:13.5px;margin-right:12px;font-variant-numeric:tabular-nums;}
.faq-q .sign{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  border:1px solid rgba(140,170,255,0.28);color:var(--primary-2);
  display:inline-flex;align-items:center;justify-content:center;font-size:16px;line-height:1;
  transition:transform var(--ease),color var(--ease),border-color var(--ease);
}
.faq-item.open .faq-q .sign{transform:rotate(45deg);color:var(--accent);border-color:var(--accent);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 340ms var(--ease);}
.faq-a p{padding:0 26px 22px 60px;font-size:15px;color:var(--t2);line-height:1.9;}

/* ============ CTA / 表单 ============ */
.cta-card{
  display:grid;grid-template-columns:1fr 44%;
  gap:clamp(28px,4vw,56px);
  padding:clamp(28px,4vw,52px);
  border-radius:22px;
  background:linear-gradient(150deg,rgba(47,111,237,0.14),rgba(13,23,48,0.9) 60%);
  border:1px solid rgba(140,170,255,0.20);
  box-shadow:inset 0 1px 0 rgba(255,255,255,0.07),var(--shadow-card);
}
.cta-card h2{font-size:clamp(1.4rem,2.4vw,1.95rem);margin-bottom:16px;}
.cta-card .cta-desc{font-size:15.4px;color:var(--t2);margin-bottom:24px;max-width:520px;}
.cta-facts{display:flex;flex-direction:column;gap:12px;margin-bottom:22px;}
.cta-facts li{display:flex;align-items:flex-start;gap:10px;font-size:14.6px;color:var(--t2);}
.cta-facts li svg{width:17px;height:17px;flex:0 0 auto;margin-top:4px;color:var(--accent);}
.form-field{margin-bottom:16px;}
.form-field label{display:block;font-size:12.5px;color:var(--t3);margin-bottom:7px;letter-spacing:0.04em;}
.form-field label .req{color:var(--accent);}
.input,.select,.textarea{
  width:100%;padding:14px 16px;border-radius:12px;
  background:rgba(8,14,27,0.75);
  border:1px solid rgba(140,170,255,0.20);
  color:var(--t1);font-size:14.8px;font-family:inherit;
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
  appearance:none;
}
.textarea{resize:vertical;min-height:104px;line-height:1.8;}
.input::placeholder,.textarea::placeholder{color:rgba(108,122,153,0.85);}
.input:focus,.select:focus,.textarea:focus{
  outline:none;border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(47,224,200,0.18);
  background:rgba(8,14,27,0.95);
}
.select{background-image:url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236C7A99' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;background-size:16px;padding-right:42px;}
.form-note{font-size:12.5px;color:var(--t3);margin-top:12px;}
.form-msg{font-size:13px;color:var(--warm);margin-top:10px;min-height:18px;}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-2);border-top:1px solid rgba(140,170,255,0.14);padding:64px 0 28px;position:relative;z-index:1;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.footer-brand p{font-size:14.4px;color:var(--t2);margin:18px 0 18px;max-width:340px;line-height:1.9;}
.footer-contact{font-size:13.5px;color:var(--t3);line-height:2;}
.footer-contact strong{color:var(--t2);font-weight:600;}
.footer-col h4{font-size:14px;color:var(--t1);margin-bottom:16px;letter-spacing:0.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--t2);}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(140,170,255,0.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--t3);
}
.footer-bottom a{color:var(--t3);text-decoration:underline;text-underline-offset:3px;}
.footer-bottom a:hover{color:var(--accent);}
.to-top{
  width:38px;height:38px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,255,255,0.16);color:var(--t2);
  background:rgba(255,255,255,0.03);
  transition:all var(--ease);
}
.to-top:hover{color:var(--t1);border-color:var(--primary-2);box-shadow:0 0 18px -4px rgba(47,111,237,0.9);}
.to-top svg{width:16px;height:16px;}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .nav-links{display:none;}
  .menu-btn{display:inline-flex;}
  .section{padding:72px 0;}
  .hero-grid{grid-template-columns:1fr;gap:28px;align-items:start;}
  .data-grid{grid-template-columns:repeat(2,1fr);row-gap:28px;}
  .data-cell{padding:0 0 0 20px;}
  .data-cell:nth-child(odd){border-left:none;padding-left:0;}
  .steps{grid-template-columns:1fr;}
  .lane{grid-template-columns:1fr;gap:28px;padding-bottom:48px;margin-bottom:48px;}
  .lane-rev .lane-media{order:0;}
  .cta-card{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:640px){
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  .section-tight{padding:48px 0;}
  .page-hero{padding:120px 0 52px;}
  .nav-actions .btn-primary{display:none;}
  .btn{width:100%;}
  .nav-actions .btn{width:auto;}
  .faq-q{padding:18px 18px;font-size:15.5px;}
  .faq-a p{padding:0 18px 18px 18px;}
  .step-card{padding:22px 20px;}
  .data-cell strong{font-size:32px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category3 */
:root{
    --bg-0:#05080F;
    --bg-1:#080E1B;
    --bg-2:#0D1730;
    --glass:rgba(120,160,255,.055);
    --glass-2:rgba(120,160,255,.10);
    --line:rgba(140,170,255,.14);
    --line-strong:rgba(77,139,255,.35);
    --primary:#2F6FED;
    --primary-2:#4D8BFF;
    --primary-3:#1B4BB8;
    --accent:#2FE0C8;
    --warm:#FFB86B;
    --t1:#EAF0FF;
    --t2:#A8B6D4;
    --t3:#6C7A99;
    --r-card:18px;
    --r-sm:12px;
    --r-pill:999px;
    --shadow-card:0 24px 60px -28px rgba(0,0,0,.85);
    --ease:cubic-bezier(.22,.61,.36,1);
    --container:1200px;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  .site-body{
    margin:0;
    font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
    background:var(--bg-0);
    color:var(--t2);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  .site-body::before{
    content:"";
    position:fixed;
    inset:0;
    z-index:0;
    pointer-events:none;
    background-image:
      linear-gradient(rgba(140,170,255,.035) 1px,transparent 1px),
      linear-gradient(90deg,rgba(140,170,255,.035) 1px,transparent 1px);
    background-size:48px 48px;
  }
  img{max-width:100%;display:block;border:0;}
  a{color:inherit;text-decoration:none;transition:color .24s var(--ease);}
  ul,ol{margin:0;padding:0;list-style:none;}
  p{margin:0 0 1.2em;}
  p:last-child{margin-bottom:0;}
  button{font:inherit;cursor:pointer;border:0;background:none;color:inherit;}
  input{font:inherit;}
  h1,h2,h3,h4{color:var(--t1);line-height:1.18;margin:0;font-weight:700;}
  a:focus-visible,button:focus-visible,input:focus-visible{
    outline:2px solid var(--accent);
    outline-offset:3px;
    border-radius:6px;
  }
  .container{
    width:100%;
    max-width:var(--container);
    margin:0 auto;
    padding:0 24px;
  }

  /* ---------- Header ---------- */
  .site-header{
    position:fixed;
    top:0;left:0;right:0;
    z-index:70;
    background:rgba(6,10,20,.35);
    -webkit-backdrop-filter:blur(18px) saturate(150%);
    backdrop-filter:blur(18px) saturate(150%);
    border-bottom:1px solid var(--line);
    transition:background .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
  }
  .site-header.is-scrolled{
    background:rgba(5,8,15,.92);
    border-bottom-color:rgba(140,170,255,.22);
    box-shadow:0 16px 40px -26px rgba(0,0,0,.95);
  }
  .header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:24px;
    height:76px;
    transition:height .3s var(--ease);
  }
  .is-scrolled .header-inner{height:64px;}
  .brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
  .brand-mark{
    width:24px;height:24px;
    border-radius:7px;
    display:grid;place-items:center;
    background:linear-gradient(135deg,#4D8BFF,#2FE0C8);
    color:#04101C;
    box-shadow:0 6px 18px -8px rgba(47,224,200,.8);
  }
  .brand-mark svg{width:16px;height:16px;}
  .brand-text{display:flex;flex-direction:column;line-height:1.1;}
  .brand-main{font-size:18px;font-weight:700;color:var(--t1);letter-spacing:.02em;}
  .brand-sub{font-size:11px;font-weight:500;letter-spacing:.08em;color:var(--t2);opacity:.7;}
  .nav-links{display:flex;align-items:center;gap:4px;}
  .nav-link{
    position:relative;
    padding:9px 13px;
    font-size:14.5px;
    color:var(--t2);
    border-radius:10px;
    transition:color .24s var(--ease),background .24s var(--ease);
  }
  .nav-link:hover{color:var(--t1);background:rgba(77,139,255,.12);}
  .nav-link:active{background:rgba(77,139,255,.2);}
  .nav-link.active{color:var(--t1);font-weight:600;}
  .nav-link.active::after{
    content:"";
    position:absolute;
    left:13px;right:13px;bottom:2px;
    height:2px;border-radius:2px;
    background:var(--accent);
  }
  .header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
  .icon-btn{
    width:40px;height:40px;
    border-radius:var(--r-pill);
    display:grid;place-items:center;
    color:var(--t2);
    border:1px solid var(--line);
    background:var(--glass);
    transition:all .24s var(--ease);
  }
  .icon-btn:hover{color:var(--t1);border-color:var(--line-strong);background:rgba(47,111,237,.16);}
  .icon-btn svg{width:18px;height:18px;}
  .menu-btn{
    display:none;
    width:40px;height:40px;
    border-radius:var(--r-pill);
    place-items:center;
    color:var(--t1);
    border:1px solid var(--line);
    background:var(--glass);
  }
  .menu-btn svg{width:20px;height:20px;}

  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:13px 24px;
    border-radius:var(--r-sm);
    font-size:15px;
    font-weight:600;
    border:1px solid transparent;
    transition:all .24s var(--ease);
    white-space:nowrap;
  }
  .btn-primary{
    background:linear-gradient(135deg,#3B7BFF,#2F6FED);
    color:#fff;
    box-shadow:0 0 0 1px rgba(77,139,255,.55),0 10px 34px -8px rgba(47,111,237,.7);
  }
  .btn-primary:hover{
    transform:translateY(-1px);
    background:linear-gradient(135deg,#4E8BFF,#3B7BFF);
    box-shadow:0 0 0 1px rgba(77,139,255,.7),0 16px 40px -8px rgba(47,111,237,.85);
  }
  .btn-primary:active{transform:translateY(0);filter:brightness(.94);}
  .btn-ghost{
    background:transparent;
    border:1px solid rgba(255,255,255,.18);
    color:var(--t1);
  }
  .btn-ghost:hover{background:rgba(47,111,237,.16);border-color:var(--primary-2);}
  .btn-ghost:active{background:rgba(47,111,237,.24);}
  .btn-sm{padding:10px 18px;font-size:14px;border-radius:10px;}
  .btn-link{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:14.5px;
    font-weight:600;
    color:var(--accent);
    padding:4px 0;
    border-bottom:1px solid transparent;
    transition:all .24s var(--ease);
  }
  .btn-link .arw{transition:transform .24s var(--ease);}
  .btn-link:hover{border-bottom-color:var(--accent);}
  .btn-link:hover .arw{transform:translateX(4px);}
  .btn-link:active{color:#7df3e2;}

  .search-panel{
    display:none;
    border-bottom:1px solid var(--line);
    background:rgba(5,8,15,.95);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
    padding:16px 0;
  }
  .search-panel.open{display:block;}
  .search-form{display:flex;gap:10px;align-items:center;flex-wrap:wrap;}
  .search-form input{
    flex:1 1 260px;
    min-width:0;
    padding:13px 16px;
    border-radius:var(--r-sm);
    background:rgba(120,160,255,.07);
    border:1px solid var(--line);
    color:var(--t1);
    font-size:14.5px;
    transition:all .24s var(--ease);
  }
  .search-form input::placeholder{color:var(--t3);}
  .search-form input:focus{
    outline:none;
    border-color:var(--accent);
    box-shadow:0 0 0 3px rgba(47,224,200,.18);
  }

  .mobile-drawer{
    display:none;
    position:fixed;
    inset:0;
    z-index:80;
    background:rgba(5,8,15,.97);
    -webkit-backdrop-filter:blur(20px);
    backdrop-filter:blur(20px);
    padding:96px 24px 32px;
    flex-direction:column;
    overflow-y:auto;
  }
  .mobile-drawer.open{display:flex;}
  .mobile-drawer .m-link{
    display:block;
    font-size:18px;
    color:var(--t1);
    padding:16px 0;
    border-bottom:1px solid var(--line);
    line-height:1.4;
  }
  .mobile-drawer .m-link.active{color:var(--accent);}
  .mobile-close{
    position:absolute;
    top:18px;right:20px;
    width:44px;height:44px;
    border-radius:var(--r-pill);
    display:grid;place-items:center;
    border:1px solid var(--line);
    color:var(--t1);
    background:var(--glass);
  }
  .mobile-close svg{width:20px;height:20px;}
  .mobile-drawer .drawer-cta{margin-top:auto;padding-top:28px;}
  .mobile-drawer .drawer-cta .btn{width:100%;}

  /* ---------- Hero ---------- */
  .page-hero{
    position:relative;
    padding:152px 0 72px;
    overflow:hidden;
    border-bottom:1px solid var(--line);
    background-image:
      linear-gradient(180deg,rgba(5,8,15,.80),rgba(5,8,15,.95)),
      url("/assets/images/backpic/back-1.webp");
    background-size:cover;
    background-position:center;
  }
  .page-hero::after{
    content:"";
    position:absolute;
    inset:0;
    pointer-events:none;
    background:
      radial-gradient(60% 60% at 10% 0%,rgba(47,111,237,.20),transparent 65%),
      radial-gradient(45% 45% at 92% 30%,rgba(47,224,200,.10),transparent 60%);
  }
  .page-hero .container{position:relative;z-index:2;}
  .breadcrumb{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:var(--t3);
    overflow-x:auto;
    white-space:nowrap;
    margin-bottom:26px;
  }
  .breadcrumb a{color:var(--t3);}
  .breadcrumb a:hover{color:var(--t2);}
  .breadcrumb .sep{opacity:.6;}
  .breadcrumb .current{color:var(--t1);}
  .hero-grid{
    display:grid;
    grid-template-columns:1.55fr .85fr;
    gap:48px;
    align-items:end;
  }
  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:9px;
    padding:7px 16px;
    border-radius:var(--r-pill);
    font-size:12.5px;
    letter-spacing:.05em;
    color:var(--t2);
    background:var(--glass);
    border:1px solid var(--line);
  }
  .eyebrow .dot{
    width:6px;height:6px;border-radius:50%;
    background:var(--accent);
    box-shadow:0 0 0 4px rgba(47,224,200,.14);
  }
  .page-title{
    font-size:clamp(2rem,4.4vw,3.2rem);
    letter-spacing:-.01em;
    margin:20px 0 16px;
  }
  .page-lead{
    font-size:16.5px;
    color:var(--t2);
    max-width:620px;
    margin-bottom:0;
  }
  .hero-facts{display:grid;gap:12px;}
  .fact{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:15px 18px;
    border-radius:14px;
    background:var(--glass);
    border:1px solid var(--line);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  }
  .fact strong{
    font-size:18px;
    color:var(--t1);
    font-variant-numeric:tabular-nums;
    font-weight:700;
    white-space:nowrap;
  }
  .fact span{font-size:13.5px;color:var(--t3);text-align:right;line-height:1.5;}

  /* ---------- Sections ---------- */
  .section{padding:88px 0;position:relative;z-index:1;}
  .section-alt{background:linear-gradient(180deg,rgba(8,14,27,.9),rgba(5,8,15,.9));border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
  .section-head{max-width:720px;margin-bottom:40px;}
  .section-head h2{font-size:clamp(1.5rem,2.6vw,2.1rem);margin-bottom:14px;}
  .section-head p{font-size:15.5px;color:var(--t2);margin-bottom:0;}
  .section-kicker{
    display:inline-block;
    font-size:12.5px;
    letter-spacing:.12em;
    color:var(--accent);
    margin-bottom:12px;
    font-weight:600;
  }

  /* ---------- Filter chips + waterfall ---------- */
  .filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:34px;}
  .chip{
    padding:9px 18px;
    border-radius:var(--r-pill);
    font-size:13.5px;
    color:var(--t2);
    border:1px solid var(--line);
    background:var(--glass);
    transition:all .24s var(--ease);
  }
  .chip:hover{color:var(--t1);border-color:var(--line-strong);background:rgba(47,111,237,.14);}
  .chip:active{transform:translateY(1px);}
  .chip.is-active{
    color:#9BF2E7;
    border-color:rgba(47,224,200,.45);
    background:rgba(47,224,200,.12);
    font-weight:600;
  }
  .waterfall{columns:2;column-gap:24px;}
  .case-card{
    break-inside:avoid;
    margin-bottom:24px;
    border-radius:var(--r-card);
    overflow:hidden;
    border:1px solid var(--line);
    background:var(--glass);
    box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
    transition:border-color .24s var(--ease),transform .24s var(--ease);
  }
  .case-card:hover{border-color:var(--line-strong);transform:translateY(-3px);}
  .case-media{position:relative;overflow:hidden;background:var(--bg-2);}
  .case-media img{
    width:100%;height:100%;
    object-fit:cover;
    transition:transform .6s var(--ease);
  }
  .case-card:hover .case-media img{transform:scale(1.04);}
  .case-overlay{
    position:absolute;
    inset:0;
    display:flex;
    flex-direction:column;
    justify-content:flex-end;
    gap:10px;
    padding:22px;
    background:linear-gradient(180deg,rgba(5,8,15,.15),rgba(5,8,15,.86));
  }
  .tag{
    display:inline-flex;
    align-items:center;
    align-self:flex-start;
    gap:6px;
    padding:4px 11px;
    border-radius:var(--r-pill);
    font-size:12px;
    letter-spacing:.03em;
    color:var(--warm);
    background:rgba(255,184,107,.10);
    border:1px solid rgba(255,184,107,.28);
  }
  .case-overlay h3{font-size:20px;font-weight:600;line-height:1.35;}
  .case-overlay p{font-size:13.5px;color:var(--t2);line-height:1.7;margin:0;max-width:440px;}
  .case-link{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:13.5px;
    color:var(--accent);
    font-weight:600;
  }
  .case-link:hover{color:#8CF5E7;}
  .mh-220{height:220px;}
  .mh-240{height:240px;}
  .mh-260{height:260px;}
  .mh-280{height:280px;}
  .mh-300{height:300px;}
  .mh-320{height:320px;}
  .waterfall-foot{margin-top:14px;}

  /* ---------- Split checklist ---------- */
  .split{
    display:grid;
    grid-template-columns:.85fr 1.15fr;
    gap:56px;
    align-items:start;
  }
  .split h2{font-size:clamp(1.5rem,2.6vw,2.1rem);margin-bottom:16px;}
  .split .lead{font-size:15.5px;color:var(--t2);max-width:420px;}
  .checklist{border-top:1px solid var(--line);}
  .checklist li{
    display:flex;
    gap:20px;
    padding:22px 0;
    border-bottom:1px solid var(--line);
  }
  .checklist .idx{
    flex-shrink:0;
    width:34px;
    font-size:13px;
    font-weight:700;
    color:var(--accent);
    font-variant-numeric:tabular-nums;
    padding-top:3px;
    letter-spacing:.04em;
  }
  .checklist h3{font-size:17px;font-weight:600;margin-bottom:6px;}
  .checklist p{font-size:14.5px;color:var(--t2);margin:0;}

  /* ---------- Steps ---------- */
  .steps{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:24px;
    margin-top:12px;
  }
  .step{
    position:relative;
    padding:26px 22px;
    border-radius:var(--r-card);
    background:var(--glass);
    border:1px solid var(--line);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
    transition:border-color .24s var(--ease),transform .24s var(--ease);
  }
  .step:hover{border-color:var(--line-strong);transform:translateY(-3px);}
  .step-num{
    font-size:34px;
    font-weight:700;
    line-height:1;
    color:transparent;
    -webkit-text-stroke:1.2px rgba(140,170,255,.55);
    font-variant-numeric:tabular-nums;
    margin-bottom:16px;
  }
  .step h3{font-size:17px;font-weight:600;margin-bottom:8px;}
  .step p{font-size:14px;color:var(--t2);margin:0;}

  /* ---------- Stats band ---------- */
  .stats-band{
    background:linear-gradient(180deg,rgba(13,23,48,.92),rgba(8,14,27,.92));
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    padding:56px 0;
    position:relative;
    z-index:1;
  }
  .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);}
  .stat{padding:0 26px;border-left:1px solid rgba(140,170,255,.18);}
  .stat:first-child{border-left:0;padding-left:0;}
  .stat strong{
    display:block;
    font-size:38px;
    font-weight:700;
    color:var(--accent);
    line-height:1.1;
    font-variant-numeric:tabular-nums;
  }
  .stat span{display:block;margin-top:10px;font-size:13px;color:var(--t3);line-height:1.6;}

  /* ---------- FAQ ---------- */
  .faq{display:grid;gap:14px;max-width:920px;margin:0 auto;}
  .faq-item{
    border:1px solid var(--line);
    border-radius:14px;
    background:var(--glass);
    overflow:hidden;
    transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
  }
  .faq-item:hover{border-color:rgba(140,170,255,.26);}
  .faq-item.is-open{
    border-color:var(--line-strong);
    box-shadow:0 0 0 1px rgba(77,139,255,.22);
  }
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    gap:16px;
    justify-content:space-between;
    padding:20px 22px;
    text-align:left;
    color:var(--t1);
    font-size:16.5px;
    font-weight:600;
    transition:color .24s var(--ease);
  }
  .faq-q:hover{color:var(--accent);}
  .faq-q .q-left{display:flex;align-items:center;gap:14px;min-width:0;}
  .faq-q .q-idx{
    flex-shrink:0;
    font-size:12.5px;
    font-weight:700;
    color:var(--accent);
    font-variant-numeric:tabular-nums;
    letter-spacing:.04em;
  }
  .faq-icon{
    flex-shrink:0;
    width:22px;height:22px;
    display:grid;place-items:center;
    color:var(--t3);
    transition:transform .28s var(--ease),color .24s var(--ease);
  }
  .faq-item.is-open .faq-icon{transform:rotate(45deg);color:var(--accent);}
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .32s var(--ease);
  }
  .faq-item.is-open .faq-a{max-height:420px;}
  .faq-a p{
    padding:0 22px 22px 58px;
    font-size:15px;
    color:var(--t2);
    line-height:1.9;
    margin:0;
  }

  /* ---------- CTA ---------- */
  .cta-panel{
    display:grid;
    grid-template-columns:1.45fr .55fr;
    gap:40px;
    align-items:center;
    padding:52px;
    border-radius:24px;
    border:1px solid var(--line);
    background:
      radial-gradient(70% 120% at 0% 0%,rgba(47,111,237,.22),transparent 60%),
      radial-gradient(60% 120% at 100% 100%,rgba(47,224,200,.12),transparent 60%),
      rgba(13,23,48,.72);
    box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
    position:relative;
    overflow:hidden;
  }
  .cta-panel h2{font-size:clamp(1.4rem,2.4vw,1.9rem);margin-bottom:14px;}
  .cta-panel p{font-size:15px;color:var(--t2);margin:0;max-width:640px;}
  .cta-actions{display:flex;flex-direction:column;gap:12px;}
  .cta-actions .btn{width:100%;}

  /* ---------- Footer ---------- */
  .site-footer{
    background:var(--bg-2);
    border-top:1px solid var(--line);
    padding:64px 0 0;
    position:relative;
    z-index:1;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.6fr 1fr 1fr 1fr;
    gap:40px;
  }
  .footer-brand p{
    font-size:14px;
    color:var(--t3);
    line-height:1.8;
    margin:18px 0;
    max-width:340px;
  }
  .footer-contact{display:grid;gap:6px;font-size:13px;color:var(--t3);}
  .footer-contact strong{color:var(--t2);font-weight:600;}
  .footer-col h4{
    font-size:13.5px;
    letter-spacing:.06em;
    color:var(--t1);
    margin-bottom:16px;
    font-weight:600;
  }
  .footer-col ul{display:grid;gap:10px;}
  .footer-col a{font-size:14px;color:var(--t3);}
  .footer-col a:hover{color:var(--t1);}
  .footer-bottom{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    flex-wrap:wrap;
    margin-top:48px;
    padding:22px 0;
    border-top:1px solid var(--line);
    font-size:13px;
    color:var(--t3);
  }
  .footer-bottom a{color:var(--t2);}
  .footer-bottom a:hover{color:var(--accent);}
  .to-top{
    width:40px;height:40px;
    border-radius:var(--r-pill);
    display:grid;place-items:center;
    border:1px solid var(--line);
    background:var(--glass);
    color:var(--t2);
    transition:all .24s var(--ease);
  }
  .to-top:hover{color:var(--accent);border-color:rgba(47,224,200,.45);box-shadow:0 0 0 3px rgba(47,224,200,.14);}
  .to-top svg{width:18px;height:18px;}

  /* ---------- Responsive ---------- */
  @media (max-width:1080px){
    .nav-links{display:none;}
    .menu-btn{display:grid;}
    .header-actions .btn-sm{display:none;}
    .hero-grid{grid-template-columns:1fr;gap:32px;align-items:start;}
    .hero-facts{grid-template-columns:repeat(3,1fr);gap:10px;}
    .fact{flex-direction:column;align-items:flex-start;justify-content:flex-start;gap:4px;}
    .fact span{text-align:left;}
  }
  @media (max-width:1024px){
    .section{padding:72px 0;}
    .split{gap:36px;}
    .steps{grid-template-columns:repeat(2,1fr);}
    .stats-grid{grid-template-columns:repeat(2,1fr);row-gap:34px;}
    .stat:nth-child(3){border-left:0;padding-left:0;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
    .cta-panel{grid-template-columns:1fr;gap:28px;padding:40px;}
    .cta-actions{flex-direction:row;}
    .cta-actions .btn{width:auto;flex:1;}
  }
  @media (max-width:768px){
    .container{padding:0 20px;}
    .page-hero{padding:126px 0 56px;}
    .section{padding:56px 0;}
    .waterfall{columns:1;}
    .split{grid-template-columns:1fr;}
    .split .lead{max-width:none;}
    .hero-facts{grid-template-columns:1fr;}
    .section-head{margin-bottom:30px;}
    .faq-a p{padding-left:22px;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .stats-band{padding:44px 0;}
  }
  @media (max-width:520px){
    .steps{grid-template-columns:1fr;}
    .stats-grid{grid-template-columns:1fr;row-gap:26px;}
    .stat{border-left:0;padding-left:0;padding-bottom:20px;border-bottom:1px solid rgba(140,170,255,.14);}
    .stat:last-child{border-bottom:0;padding-bottom:0;}
    .cta-panel{padding:28px 22px;}
    .cta-actions{flex-direction:column;}
    .cta-actions .btn{width:100%;}
    .btn{width:100%;}
    .header-actions .btn{width:auto;}
    .hero-grid{gap:24px;}
    .case-overlay{padding:18px;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
  }
  @media (prefers-reduced-motion:reduce){
    *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
    .case-card:hover,.step:hover,.btn-primary:hover{transform:none;}
  }

/* roulang page: category4 */
:root{
    --bg-0:#05080F;
    --bg-1:#080E1B;
    --bg-2:#0D1730;
    --glass:rgba(120,160,255,0.055);
    --line:rgba(140,170,255,0.14);
    --line-soft:rgba(140,170,255,0.09);
    --primary:#2F6FED;
    --primary-2:#4D8BFF;
    --primary-3:#1B4BB8;
    --accent:#2FE0C8;
    --warm:#FFB86B;
    --t1:#EAF0FF;
    --t2:#A8B6D4;
    --t3:#6C7A99;
    --r-card:18px;
    --r-sm:12px;
    --shadow-card:0 24px 60px -28px rgba(0,0,0,.85);
    --ease:240ms cubic-bezier(.22,.61,.36,1);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body.app-body{
    margin:0;
    background:var(--bg-0);
    color:var(--t2);
    font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  body.app-body::before{
    content:"";
    position:fixed;
    inset:0;
    z-index:0;
    pointer-events:none;
    background-image:
      linear-gradient(rgba(140,170,255,.032) 1px,transparent 1px),
      linear-gradient(90deg,rgba(140,170,255,.032) 1px,transparent 1px);
    background-size:48px 48px;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit;border:0;background:none;cursor:pointer;color:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p,dl,dd{margin:0}
  :focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}

  .container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 24px;
    position:relative;
    z-index:1;
  }

  /* ---------- Header ---------- */
  .site-header{
    position:fixed;
    top:0;left:0;right:0;
    z-index:60;
    background:rgba(6,10,20,.35);
    -webkit-backdrop-filter:blur(18px) saturate(150%);
    backdrop-filter:blur(18px) saturate(150%);
    border-bottom:1px solid rgba(140,170,255,.10);
    transition:background var(--ease),box-shadow var(--ease),border-color var(--ease);
  }
  .site-header.scrolled{
    background:rgba(5,8,15,.92);
    border-bottom-color:rgba(140,170,255,.16);
    box-shadow:0 18px 46px -26px rgba(0,0,0,.95);
  }
  .header-inner{
    display:flex;
    align-items:center;
    gap:18px;
    height:76px;
    transition:height var(--ease);
  }
  .site-header.scrolled .header-inner{height:64px}

  .brand{
    display:inline-flex;
    align-items:center;
    gap:10px;
    flex:0 0 auto;
  }
  .brand-mark{
    width:24px;height:24px;
    border-radius:7px;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    background:linear-gradient(140deg,rgba(77,139,255,.34),rgba(47,224,200,.20));
    border:1px solid rgba(140,170,255,.34);
    color:var(--accent);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.10);
  }
  .brand-mark svg{width:16px;height:16px}
  .brand-text{display:flex;flex-direction:column;line-height:1.1}
  .brand-main{font-size:18px;font-weight:700;color:var(--t1);letter-spacing:.02em}
  .brand-sub{font-size:11px;font-weight:500;letter-spacing:.08em;color:var(--t2);opacity:.7}

  .nav-links{
    display:flex;
    align-items:center;
    gap:2px;
    margin-left:auto;
  }
  .nav-link{
    position:relative;
    display:inline-block;
    padding:8px 12px;
    font-size:14.5px;
    color:var(--t2);
    border-radius:10px;
    transition:color var(--ease),background var(--ease);
    white-space:nowrap;
  }
  .nav-link:hover,.nav-link:focus-visible{color:var(--t1);background:rgba(47,111,237,.14)}
  .nav-link.active{color:var(--t1);font-weight:600}
  .nav-link.active::after{
    content:"";
    position:absolute;
    left:12px;bottom:2px;
    width:18px;height:2px;
    border-radius:2px;
    background:var(--accent);
  }

  .header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
  .icon-btn{
    width:38px;height:38px;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:50%;
    border:1px solid rgba(255,255,255,.16);
    background:rgba(255,255,255,.04);
    color:var(--t2);
    transition:color var(--ease),border-color var(--ease),background var(--ease),transform var(--ease);
  }
  .icon-btn svg{width:17px;height:17px}
  .icon-btn:hover{color:var(--t1);border-color:rgba(77,139,255,.6);background:rgba(47,111,237,.18);transform:translateY(-1px)}

  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:13px 24px;
    font-size:15px;
    font-weight:600;
    border-radius:var(--r-sm);
    transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease),filter var(--ease);
    white-space:nowrap;
  }
  .btn svg{width:16px;height:16px;transition:transform var(--ease)}
  .btn-primary{
    color:#fff;
    background:linear-gradient(135deg,#3B7BFF 0%,#2F6FED 100%);
    box-shadow:0 0 0 1px rgba(77,139,255,.55),0 10px 34px -8px rgba(47,111,237,.7);
  }
  .btn-primary:hover{
    transform:translateY(-1px);
    background:linear-gradient(135deg,#4E8BFF 0%,#3A7BF5 100%);
    box-shadow:0 0 0 1px rgba(120,170,255,.75),0 14px 40px -6px rgba(47,111,237,.85);
  }
  .btn-primary:active{transform:translateY(0);filter:brightness(.94)}
  .btn-ghost{
    color:var(--t1);
    border:1px solid rgba(255,255,255,.18);
    background:transparent;
  }
  .btn-ghost:hover{background:rgba(47,111,237,.16);border-color:var(--primary-2);transform:translateY(-1px)}
  .btn-ghost:active{transform:translateY(0);filter:brightness(.95)}
  .btn-sm{padding:9px 16px;font-size:13.5px;border-radius:10px}
  .btn:hover svg{transform:translateX(3px)}

  .menu-btn{
    display:none;
    width:38px;height:38px;
    align-items:center;justify-content:center;
    border-radius:10px;
    border:1px solid rgba(255,255,255,.16);
    color:var(--t1);
    background:rgba(255,255,255,.04);
  }
  .menu-btn svg{width:18px;height:18px}

  .mobile-drawer{
    position:fixed;
    inset:0;
    z-index:80;
    display:flex;
    flex-direction:column;
    padding:22px 24px 30px;
    background:rgba(5,8,15,.97);
    -webkit-backdrop-filter:blur(22px);
    backdrop-filter:blur(22px);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
  }
  .mobile-drawer.open{opacity:1;visibility:visible;transform:translateY(0)}
  .drawer-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:18px;border-bottom:1px solid var(--line-soft)}
  .drawer-close{
    width:38px;height:38px;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:10px;border:1px solid rgba(255,255,255,.16);
    color:var(--t1);
  }
  .drawer-close svg{width:18px;height:18px}
  .drawer-links{display:flex;flex-direction:column;padding:12px 0 0}
  .drawer-link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    min-height:56px;
    font-size:18px;
    color:var(--t2);
    border-bottom:1px solid var(--line-soft);
    transition:color var(--ease),padding-left var(--ease);
  }
  .drawer-link:hover,.drawer-link:focus-visible{color:var(--t1);padding-left:6px}
  .drawer-link.active{color:var(--accent)}
  .drawer-link svg{width:16px;height:16px;color:var(--t3)}
  .drawer-cta{margin-top:auto;padding-top:24px}
  .drawer-cta .btn{width:100%}

  /* ---------- Hero ---------- */
  .page-hero{
    position:relative;
    padding:150px 0 64px;
    overflow:hidden;
    background:linear-gradient(180deg,var(--bg-1) 0%,var(--bg-0) 100%);
  }
  .page-hero::before{
    content:"";
    position:absolute;
    top:-20%;left:-8%;
    width:66%;height:120%;
    background:radial-gradient(circle,rgba(47,111,237,.20) 0%,transparent 62%);
    pointer-events:none;
  }
  .page-hero::after{
    content:"";
    position:absolute;
    bottom:-30%;right:-6%;
    width:52%;height:100%;
    background:radial-gradient(circle,rgba(47,224,200,.10) 0%,transparent 60%);
    pointer-events:none;
  }
  .breadcrumb{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:var(--t3);
    margin-bottom:26px;
    white-space:nowrap;
    overflow-x:auto;
    scrollbar-width:none;
  }
  .breadcrumb::-webkit-scrollbar{display:none}
  .breadcrumb a{color:var(--t3);transition:color var(--ease)}
  .breadcrumb a:hover{color:var(--primary-2)}
  .breadcrumb .sep{color:rgba(108,122,153,.6)}
  .breadcrumb .current{color:var(--t1)}

  .hero-grid{
    display:grid;
    grid-template-columns:1.15fr .85fr;
    gap:48px;
    align-items:center;
  }
  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:7px 14px;
    border-radius:999px;
    border:1px solid rgba(140,170,255,.24);
    background:rgba(120,160,255,.07);
    font-size:12.5px;
    letter-spacing:.06em;
    color:var(--t2);
    margin-bottom:20px;
  }
  .eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px rgba(47,224,200,.8)}
  .page-title{
    font-size:clamp(2rem,4.4vw,3.1rem);
    line-height:1.18;
    font-weight:700;
    color:var(--t1);
    letter-spacing:.01em;
  }
  .page-sub{
    margin-top:18px;
    max-width:620px;
    font-size:16.5px;
    line-height:1.9;
    color:var(--t2);
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
  .hero-media{position:relative}
  .hero-media img{
    width:100%;
    aspect-ratio:4/3;
    object-fit:cover;
    border-radius:20px;
    border:1px solid var(--line);
    box-shadow:var(--shadow-card);
  }
  .hero-media::after{
    content:"";
    position:absolute;
    inset:0;
    border-radius:20px;
    background:linear-gradient(180deg,rgba(5,8,15,.10) 0%,rgba(5,8,15,.78) 100%);
    pointer-events:none;
  }
  .hero-tag{
    position:absolute;
    left:16px;bottom:16px;
    z-index:2;
    display:flex;
    align-items:center;
    gap:10px;
    padding:9px 14px;
    border-radius:12px;
    border:1px solid rgba(140,170,255,.26);
    background:rgba(8,14,27,.78);
    -webkit-backdrop-filter:blur(10px);
    backdrop-filter:blur(10px);
    font-size:12.5px;
    color:var(--t2);
  }
  .hero-tag strong{color:var(--accent);font-weight:700;font-variant-numeric:tabular-nums}

  /* ---------- Sections ---------- */
  .section{padding:84px 0;position:relative}
  .section-tight{padding:64px 0}
  .section-alt{background:var(--bg-1);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
  .section-head{max-width:780px;margin-bottom:44px}
  .section-label{
    display:inline-block;
    font-size:12.5px;
    letter-spacing:.12em;
    color:var(--accent);
    margin-bottom:12px;
  }
  .section-title{
    font-size:clamp(1.5rem,2.6vw,2.05rem);
    line-height:1.24;
    font-weight:700;
    color:var(--t1);
  }
  .section-desc{margin-top:14px;font-size:15.5px;line-height:1.9;color:var(--t2);max-width:680px}

  /* ---------- Metrics ---------- */
  .metrics-band{
    background:var(--bg-2);
    border-top:1px solid var(--line-soft);
    border-bottom:1px solid var(--line-soft);
    padding:44px 0;
  }
  .metrics{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:0;
  }
  .metric{
    padding:6px 26px;
    border-left:1px solid rgba(140,170,255,.13);
  }
  .metric:first-child{border-left:0;padding-left:0}
  .metric-value{
    font-size:clamp(1.7rem,3vw,2.35rem);
    font-weight:700;
    line-height:1.2;
    color:var(--accent);
    font-variant-numeric:tabular-nums;
  }
  .metric-value small{font-size:.5em;margin-left:4px;color:var(--t2);font-weight:600}
  .metric-label{margin-top:8px;font-size:13px;color:var(--t2);line-height:1.7}

  /* ---------- Rules Tabs ---------- */
  .rules-layout{
    display:grid;
    grid-template-columns:298px minmax(0,1fr);
    gap:34px;
    align-items:start;
  }
  .rules-nav{
    display:flex;
    flex-direction:column;
    gap:6px;
    padding:10px;
    border-radius:var(--r-card);
    border:1px solid var(--line);
    background:var(--glass);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
    position:sticky;
    top:96px;
  }
  .rules-tab{
    display:flex;
    align-items:center;
    gap:12px;
    width:100%;
    text-align:left;
    padding:13px 14px;
    border-radius:12px;
    font-size:15px;
    color:var(--t2);
    border:1px solid transparent;
    transition:background var(--ease),color var(--ease),border-color var(--ease);
  }
  .rules-tab .num{
    font-size:12px;
    font-weight:700;
    letter-spacing:.04em;
    color:var(--t3);
    font-variant-numeric:tabular-nums;
    transition:color var(--ease);
  }
  .rules-tab:hover{background:rgba(47,111,237,.14);color:var(--t1)}
  .rules-tab.active{
    background:rgba(47,111,237,.18);
    border-color:rgba(77,139,255,.42);
    color:var(--t1);
    font-weight:600;
  }
  .rules-tab.active .num{color:var(--accent)}

  .rules-panels{min-height:420px}
  .rules-panel{display:none}
  .rules-panel.active{display:block;animation:fadeUp 320ms cubic-bezier(.22,.61,.36,1) both}
  @keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
  .panel-card{
    position:relative;
    border-radius:var(--r-card);
    border:1px solid var(--line);
    background:var(--glass);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow-card);
    padding:34px;
    overflow:hidden;
  }
  .panel-card::before{
    content:"";
    position:absolute;
    top:0;left:0;right:0;height:2px;
    background:linear-gradient(90deg,var(--primary-2),rgba(47,224,200,.7),transparent);
  }
  .panel-badge{
    display:inline-flex;
    align-items:center;
    gap:7px;
    padding:5px 11px;
    border-radius:999px;
    font-size:12px;
    color:var(--warm);
    background:rgba(255,184,107,.10);
    border:1px solid rgba(255,184,107,.28);
    margin-bottom:16px;
  }
  .panel-title{font-size:22px;font-weight:700;color:var(--t1);line-height:1.35}
  .panel-text{margin-top:14px;font-size:15.5px;line-height:1.92;color:var(--t2);max-width:640px}
  .panel-points{margin-top:22px;display:grid;gap:12px}
  .panel-points li{
    display:flex;
    gap:11px;
    font-size:15px;
    line-height:1.85;
    color:var(--t2);
  }
  .panel-points li::before{
    content:"";
    flex:0 0 auto;
    width:7px;height:7px;
    margin-top:11px;
    border-radius:2px;
    background:var(--accent);
  }
  .panel-foot{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:space-between;
    gap:14px;
    margin-top:26px;
    padding-top:22px;
    border-top:1px solid var(--line-soft);
  }
  .panel-foot .hint{font-size:13px;color:var(--t3)}
  .link-arrow{
    display:inline-flex;
    align-items:center;
    gap:7px;
    font-size:14.5px;
    font-weight:600;
    color:var(--primary-2);
    padding-bottom:2px;
    border-bottom:1px solid transparent;
    transition:color var(--ease),border-color var(--ease);
  }
  .link-arrow svg{width:15px;height:15px;transition:transform var(--ease)}
  .link-arrow:hover{color:var(--accent);border-bottom-color:var(--accent)}
  .link-arrow:hover svg{transform:translateX(4px)}

  /* ---------- Flow ---------- */
  .flow{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:22px;
    position:relative;
  }
  .flow-step{
    position:relative;
    padding:26px 22px;
    border-radius:var(--r-card);
    border:1px solid var(--line);
    background:var(--glass);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
    transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
  }
  .flow-step:hover{transform:translateY(-3px);border-color:rgba(77,139,255,.42);box-shadow:0 0 0 1px rgba(77,139,255,.22),var(--shadow-card)}
  .flow-num{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:38px;height:38px;
    border-radius:11px;
    font-size:14px;
    font-weight:700;
    color:var(--accent);
    background:rgba(47,224,200,.09);
    border:1px solid rgba(47,224,200,.26);
    font-variant-numeric:tabular-nums;
    margin-bottom:16px;
  }
  .flow-step h3{font-size:17px;font-weight:600;color:var(--t1);line-height:1.5}
  .flow-step p{margin-top:9px;font-size:14px;line-height:1.85;color:var(--t2)}
  .flow-step::after{
    content:"";
    position:absolute;
    top:44px;right:-13px;
    width:6px;height:6px;
    border-right:1.5px solid rgba(140,170,255,.45);
    border-top:1.5px solid rgba(140,170,255,.45);
    transform:rotate(45deg);
  }
  .flow-step:last-child::after{display:none}

  /* ---------- Spec + Aside ---------- */
  .spec-layout{
    display:grid;
    grid-template-columns:minmax(0,1fr) 340px;
    gap:38px;
    align-items:start;
  }
  .spec-list{
    border-top:1px solid var(--line-soft);
  }
  .spec-item{
    display:grid;
    grid-template-columns:180px minmax(0,1fr);
    gap:22px;
    padding:20px 4px;
    border-bottom:1px solid var(--line-soft);
    transition:background var(--ease),padding-left var(--ease);
  }
  .spec-item:hover{background:rgba(120,160,255,.05);padding-left:12px}
  .spec-key{font-size:15px;font-weight:600;color:var(--t1)}
  .spec-val{font-size:15px;line-height:1.85;color:var(--t2)}
  .spec-val strong{color:var(--accent);font-weight:600}

  .side-card{
    position:sticky;
    top:96px;
    border-radius:var(--r-card);
    border:1px solid var(--line);
    background:linear-gradient(180deg,rgba(120,160,255,.08),rgba(13,23,48,.6));
    box-shadow:inset 0 1px 0 rgba(255,255,255,.07),var(--shadow-card);
    overflow:hidden;
  }
  .side-card img{
    width:100%;
    aspect-ratio:16/10;
    object-fit:cover;
    border-bottom:1px solid var(--line-soft);
  }
  .side-card-body{padding:24px}
  .side-card h3{font-size:18px;font-weight:700;color:var(--t1);line-height:1.45}
  .side-card p{margin-top:10px;font-size:14px;line-height:1.85;color:var(--t2)}
  .side-card .btn{width:100%;margin-top:18px}
  .side-list{margin-top:16px;display:grid;gap:10px}
  .side-list li{font-size:13.5px;color:var(--t2);display:flex;gap:9px;line-height:1.75}
  .side-list li::before{content:"";flex:0 0 auto;width:5px;height:5px;margin-top:9px;border-radius:50%;background:var(--primary-2)}

  /* ---------- FAQ ---------- */
  .faq{display:grid;gap:12px}
  .faq-item{
    border-radius:14px;
    border:1px solid var(--line);
    background:var(--glass);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
    transition:border-color var(--ease),background var(--ease);
    overflow:hidden;
  }
  .faq-item:hover{border-color:rgba(77,139,255,.3)}
  .faq-item.open{border-color:rgba(77,139,255,.5);background:rgba(120,160,255,.08)}
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    gap:14px;
    padding:19px 22px;
    text-align:left;
    font-size:16.5px;
    font-weight:600;
    color:var(--t1);
    line-height:1.6;
  }
  .faq-q .idx{
    font-size:13px;
    font-weight:700;
    color:var(--accent);
    font-variant-numeric:tabular-nums;
    flex:0 0 auto;
  }
  .faq-q .toggle{
    margin-left:auto;
    flex:0 0 auto;
    width:22px;height:22px;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:50%;
    border:1px solid rgba(140,170,255,.32);
    color:var(--t2);
    transition:transform var(--ease),color var(--ease),border-color var(--ease);
  }
  .faq-q .toggle svg{width:12px;height:12px}
  .faq-item.open .faq-q .toggle{transform:rotate(45deg);color:var(--accent);border-color:rgba(47,224,200,.5)}
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height 340ms cubic-bezier(.22,.61,.36,1);
  }
  .faq-a-inner{padding:0 22px 22px 50px;font-size:15px;line-height:1.92;color:var(--t2)}

  /* ---------- CTA ---------- */
  .cta-card{
    position:relative;
    border-radius:22px;
    border:1px solid rgba(140,170,255,.22);
    background:
      radial-gradient(900px 320px at 12% 0%,rgba(47,111,237,.22),transparent 62%),
      linear-gradient(180deg,rgba(13,23,48,.9),rgba(8,14,27,.9));
    box-shadow:inset 0 1px 0 rgba(255,255,255,.08),var(--shadow-card);
    padding:46px;
    display:grid;
    grid-template-columns:1.25fr auto;
    gap:34px;
    align-items:center;
    overflow:hidden;
  }
  .cta-card h2{font-size:clamp(1.4rem,2.3vw,1.85rem);font-weight:700;color:var(--t1);line-height:1.3}
  .cta-card p{margin-top:14px;font-size:15.5px;line-height:1.9;color:var(--t2);max-width:560px}
  .cta-actions{display:flex;flex-direction:column;gap:12px;min-width:220px}
  .cta-actions .btn{width:100%}
  .cta-note{font-size:12.5px;color:var(--t3);text-align:center;line-height:1.7}

  /* ---------- Footer ---------- */
  .site-footer{
    position:relative;
    z-index:1;
    background:var(--bg-2);
    border-top:1px solid var(--line);
    padding:64px 0 26px;
    margin-top:20px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1fr;
    gap:38px;
    padding-bottom:44px;
  }
  .footer-brand p{
    margin-top:16px;
    font-size:14px;
    line-height:1.85;
    color:var(--t2);
    max-width:340px;
  }
  .footer-contact{margin-top:18px;display:grid;gap:6px;font-size:13px;color:var(--t3)}
  .footer-contact strong{color:var(--t2);font-weight:600}
  .footer-col h4{
    font-size:14px;
    font-weight:600;
    color:var(--t1);
    margin-bottom:16px;
    letter-spacing:.04em;
  }
  .footer-col ul{display:grid;gap:11px}
  .footer-col a{
    font-size:14px;
    color:var(--t2);
    transition:color var(--ease),padding-left var(--ease);
  }
  .footer-col a:hover{color:var(--accent);padding-left:4px}
  .footer-bottom{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding-top:22px;
    border-top:1px solid var(--line-soft);
    font-size:13px;
    color:var(--t3);
    flex-wrap:wrap;
  }
  .footer-bottom a{color:var(--t2);border-bottom:1px solid rgba(140,170,255,.28);transition:color var(--ease),border-color var(--ease)}
  .footer-bottom a:hover{color:var(--accent);border-color:var(--accent)}
  .to-top{
    width:40px;height:40px;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:50%;
    border:1px solid rgba(255,255,255,.16);
    background:rgba(255,255,255,.05);
    color:var(--t2);
    transition:color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease);
  }
  .to-top svg{width:16px;height:16px}
  .to-top:hover{color:var(--t1);border-color:rgba(77,139,255,.7);box-shadow:0 0 22px -4px rgba(47,111,237,.8);transform:translateY(-2px)}

  /* ---------- Responsive ---------- */
  @media (max-width:1023px){
    .nav-links{display:none}
    .menu-btn{display:inline-flex}
    .header-actions .btn-sm{display:none}
    .hero-grid{grid-template-columns:1fr;gap:36px}
    .hero-media{max-width:560px}
    .rules-layout{grid-template-columns:1fr;gap:24px}
    .rules-nav{
      position:static;
      flex-direction:row;
      overflow-x:auto;
      scrollbar-width:none;
      gap:8px;
    }
    .rules-nav::-webkit-scrollbar{display:none}
    .rules-tab{width:auto;white-space:nowrap;flex:0 0 auto}
    .flow{grid-template-columns:repeat(2,1fr)}
    .flow-step::after{display:none}
    .spec-layout{grid-template-columns:1fr}
    .side-card{position:static}
    .cta-card{grid-template-columns:1fr;padding:36px}
    .cta-actions{flex-direction:row;flex-wrap:wrap}
    .cta-actions .btn{width:auto;flex:1 1 180px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  }
  @media (max-width:767px){
    .container{padding:0 20px}
    .page-hero{padding:126px 0 48px}
    .section{padding:60px 0}
    .section-tight{padding:48px 0}
    .metrics{grid-template-columns:repeat(2,1fr);gap:26px 0}
    .metric{padding:0 18px}
    .metric:nth-child(3){border-left:0;padding-left:0}
    .metric:nth-child(odd){border-left:0;padding-left:0}
    .panel-card{padding:24px}
    .spec-item{grid-template-columns:1fr;gap:6px}
    .faq-q{font-size:15.5px;padding:16px 18px}
    .faq-a-inner{padding:0 18px 18px 18px}
    .footer-grid{grid-template-columns:1fr}
    .footer-bottom{flex-direction:column;align-items:flex-start}
  }
  @media (max-width:519px){
    .flow{grid-template-columns:1fr}
    .hero-actions .btn{width:100%}
    .metrics{grid-template-columns:1fr;gap:20px}
    .metric{border-left:0;padding-left:0;padding-bottom:16px;border-bottom:1px solid var(--line-soft)}
    .metric:last-child{border-bottom:0;padding-bottom:0}
    .cta-card{padding:26px 22px}
    .cta-actions{flex-direction:column}
    .cta-actions .btn{width:100%}
    .page-title{font-size:1.9rem}
  }
  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto}
    *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  }

/* roulang page: category5 */
:root{
  --bg-0:#05080F;
  --bg-1:#080E1B;
  --bg-2:#0D1730;
  --glass:rgba(120,160,255,.055);
  --line:rgba(140,170,255,.14);
  --primary:#2F6FED;
  --primary-2:#4D8BFF;
  --primary-3:#1B4BB8;
  --accent:#2FE0C8;
  --warm:#FFB86B;
  --t1:#EAF0FF;
  --t2:#A8B6D4;
  --t3:#6C7A99;
  --r-card:18px;
  --r-sm:12px;
  --shadow-card:0 24px 60px -28px rgba(0,0,0,.85);
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:240ms;
  --header-h:76px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--t2);
  background-color:var(--bg-0);
  background-image:
    linear-gradient(rgba(140,170,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(140,170,255,.035) 1px,transparent 1px);
  background-size:48px 48px,48px 48px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--primary-2);text-decoration:none;transition:color var(--dur) var(--ease)}
a:hover{color:var(--accent)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
h1,h2,h3,h4{margin:0;color:var(--t1);line-height:1.18;font-weight:700}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
::selection{background:rgba(47,224,200,.28);color:#fff}

header .container,
main .container,
.site-footer .container{
  width:100%;
  max-width:1200px;
  margin-inline:auto;
  padding-inline:24px;
}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  background:rgba(6,10,20,.35);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  backdrop-filter:blur(18px) saturate(150%);
  border-bottom:1px solid var(--line);
  transition:background var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.site-header.is-scrolled{
  background:rgba(5,8,15,.92);
  box-shadow:0 14px 40px -22px rgba(0,0,0,.95);
  border-bottom-color:rgba(140,170,255,.2);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:var(--header-h);
  transition:height var(--dur) var(--ease);
}
.site-header.is-scrolled .nav-inner{height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none}
.brand-mark{
  width:24px;height:24px;flex:none;
  border-radius:7px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(77,139,255,.3),rgba(47,224,200,.18));
  border:1px solid rgba(140,170,255,.35);
  color:var(--accent);
}
.brand-mark svg{width:16px;height:16px}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-main{font-size:18px;font-weight:700;color:var(--t1);letter-spacing:.02em}
.brand-sub{font-size:11px;font-weight:500;letter-spacing:.08em;color:rgba(234,240,255,.7)}

.nav-links{display:flex;align-items:center;gap:26px}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--t2);
  padding:6px 0;
  transition:color var(--dur) var(--ease);
  white-space:nowrap;
}
.nav-link:hover,.nav-link:focus-visible{color:var(--t1)}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;bottom:-2px;
  width:0;height:2px;
  border-radius:2px;
  background:var(--accent);
  transform:translateX(-50%);
  transition:width var(--dur) var(--ease);
}
.nav-link:hover::after{width:16px}
.nav-link.active{color:var(--t1);font-weight:600}
.nav-link.active::after{width:16px}

.nav-actions{display:flex;align-items:center;gap:12px}
.icon-btn{
  width:38px;height:38px;flex:none;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.16);
  background:rgba(120,160,255,.06);
  color:var(--t2);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.icon-btn:hover{color:var(--accent);border-color:var(--primary-2);background:rgba(47,111,237,.16);transform:translateY(-1px)}
.icon-btn svg{width:17px;height:17px}
.mobile-toggle{
  display:none;
  width:40px;height:40px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.16);
  color:var(--t1);
  align-items:center;justify-content:center;
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.mobile-toggle:hover{border-color:var(--primary-2);background:rgba(47,111,237,.16)}
.mobile-toggle svg{width:20px;height:20px}
.nav-cta-mobile{display:none}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-sm);
  font-weight:600;font-size:15px;
  padding:14px 24px;
  white-space:nowrap;
  cursor:pointer;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn-primary{
  background:linear-gradient(135deg,#3B7BFF,#2F6FED);
  color:#fff;
  box-shadow:0 0 0 1px rgba(77,139,255,.55),0 10px 34px -8px rgba(47,111,237,.7);
}
.btn-primary:hover{
  color:#fff;
  transform:translateY(-1px);
  background:linear-gradient(135deg,#4D8BFF,#3B7BFF);
  box-shadow:0 0 0 1px rgba(77,139,255,.8),0 16px 42px -6px rgba(47,111,237,.85);
}
.btn-primary:active{transform:translateY(0);filter:brightness(.94)}
.btn-ghost{
  border:1px solid rgba(255,255,255,.18);
  color:var(--t1);
  background:transparent;
}
.btn-ghost:hover{
  color:#fff;
  background:rgba(47,111,237,.16);
  border-color:var(--primary-2);
  transform:translateY(-1px);
}
.btn-ghost:active{transform:translateY(0);filter:brightness(.94)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-block{width:100%}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--primary-2);font-weight:600;font-size:15px;
  padding:2px 0;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn-text svg{width:15px;height:15px;transition:transform var(--dur) var(--ease)}
.btn-text:hover{color:var(--accent);border-bottom-color:var(--accent)}
.btn-text:hover svg{transform:translateX(4px)}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--t3);
  margin-bottom:22px;
  overflow-x:auto;
  white-space:nowrap;
  scrollbar-width:none;
}
.breadcrumb::-webkit-scrollbar{display:none}
.breadcrumb a{color:var(--t3)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb span{color:var(--t1)}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding:calc(var(--header-h) + 64px) 0 72px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(120% 90% at 10% 0%,rgba(47,111,237,.20),transparent 60%),
    radial-gradient(90% 80% at 90% 18%,rgba(47,224,200,.10),transparent 55%),
    var(--bg-0);
}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) 336px;
  gap:56px;
  align-items:center;
}
.hero-pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--glass);
  font-size:13px;
  color:var(--t2);
  margin-bottom:20px;
}
.hero-pill .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px rgba(47,224,200,.8)}
.hero-title{
  font-size:clamp(1.9rem,3.6vw,2.85rem);
  letter-spacing:-.01em;
  margin-bottom:18px;
}
.hero-title em{font-style:normal;color:var(--accent)}
.hero-desc{font-size:17px;line-height:1.9;color:var(--t2);max-width:620px}
.hero-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  margin-top:28px;
  font-size:13px;
  color:var(--t3);
}
.hero-meta .sep{width:1px;height:14px;background:var(--line)}
.hero-meta strong{color:var(--t1);font-size:16px;font-weight:700;font-variant-numeric:tabular-nums}
.hero-aside{position:relative}
.hero-figure{
  margin:0;
  border-radius:20px;
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  aspect-ratio:16/11;
  position:relative;
}
.hero-figure img{width:100%;height:100%;object-fit:cover;filter:saturate(1.05)}
.hero-figure::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,.15),rgba(5,8,15,.82));
}
.hero-stat{
  position:absolute;
  left:-16px;bottom:-18px;
  display:flex;align-items:center;gap:10px;
  padding:12px 16px;
  border-radius:14px;
  background:rgba(13,23,48,.92);
  border:1px solid rgba(140,170,255,.26);
  box-shadow:var(--shadow-card);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.hero-stat .dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px rgba(47,224,200,.9);flex:none}
.hero-stat strong{display:block;font-size:15px;color:var(--t1);font-variant-numeric:tabular-nums;line-height:1.3}
.hero-stat span{font-size:12px;color:var(--t3)}

/* ---------- 主体布局 ---------- */
.main-section{padding:72px 0 88px}
.layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 340px;
  gap:48px;
  align-items:start;
}
.section-head{margin-bottom:28px}
.section-head h2{font-size:clamp(1.4rem,2.4vw,1.9rem);margin-bottom:12px}
.section-head p{font-size:15px;color:var(--t2);max-width:620px}
.eyebrow{
  display:inline-block;
  font-size:12px;letter-spacing:.12em;
  color:var(--accent);
  margin-bottom:10px;
}

/* 快捷入口 */
.quick-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px;
  margin-bottom:56px;
}
.quick-card{
  display:block;
  padding:22px 22px 20px;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.quick-card:hover{
  transform:translateY(-3px);
  border-color:rgba(77,139,255,.35);
  background:rgba(120,160,255,.08);
  box-shadow:var(--shadow-card);
}
.quick-icon{
  width:36px;height:36px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;
  border:1px solid rgba(140,170,255,.28);
  background:rgba(47,111,237,.16);
  color:var(--accent);
  margin-bottom:14px;
}
.quick-icon svg{width:18px;height:18px}
.quick-card h3{font-size:17px;margin-bottom:8px;transition:color var(--dur) var(--ease)}
.quick-card:hover h3{color:var(--accent)}
.quick-card p{font-size:14px;line-height:1.8;color:var(--t2)}
.quick-link{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:14px;font-size:13px;color:var(--primary-2);font-weight:600;
}
.quick-link svg{width:13px;height:13px;transition:transform var(--dur) var(--ease)}
.quick-card:hover .quick-link svg{transform:translateX(4px)}

/* FAQ */
.faq-group{margin-bottom:40px}
.faq-group:last-child{margin-bottom:0}
.faq-group-title{
  display:flex;align-items:center;gap:12px;
  margin-bottom:16px;
}
.faq-group-title .idx{
  font-size:13px;font-weight:700;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
  letter-spacing:.06em;
}
.faq-group-title h3{font-size:19px}
.faq-group-title .line{flex:1;height:1px;background:var(--line)}

.faq-item{
  border:1px solid var(--line);
  border-radius:14px;
  background:var(--glass);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease);
}
.faq-item:hover{border-color:rgba(140,170,255,.28)}
.faq-item.is-open{
  border-color:rgba(77,139,255,.55);
  box-shadow:0 0 0 1px rgba(77,139,255,.2);
  background:rgba(120,160,255,.075);
}
.faq-q{
  width:100%;
  display:flex;align-items:flex-start;gap:14px;
  padding:18px 20px;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--t1);
  line-height:1.55;
  transition:color var(--dur) var(--ease);
}
.faq-q:hover{color:var(--primary-2)}
.faq-num{
  flex:none;
  font-size:13px;font-weight:700;
  color:var(--t3);
  font-variant-numeric:tabular-nums;
  padding-top:4px;
  min-width:22px;
}
.faq-item.is-open .faq-num{color:var(--accent)}
.faq-sign{
  position:relative;
  flex:none;
  width:20px;height:20px;
  margin-left:auto;
  border-radius:50%;
  border:1px solid rgba(140,170,255,.35);
  margin-top:2px;
}
.faq-sign::before,.faq-sign::after{
  content:"";
  position:absolute;
  top:50%;left:50%;
  background:var(--accent);
  transform:translate(-50%,-50%);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.faq-sign::before{width:9px;height:1.5px}
.faq-sign::after{width:1.5px;height:9px}
.faq-item.is-open .faq-sign::after{opacity:0;transform:translate(-50%,-50%) rotate(90deg)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .38s var(--ease);
}
.faq-item.is-open .faq-a{max-height:520px}
.faq-a-inner{
  padding:0 20px 20px 56px;
  font-size:15px;
  line-height:1.9;
  color:var(--t2);
}
.faq-a-inner strong{color:var(--t1);font-weight:600}

/* 侧栏 */
.side-col{position:relative}
.assist-card{
  position:sticky;
  top:96px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(120,160,255,.09),rgba(120,160,255,.03));
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  padding:26px 24px;
  overflow:hidden;
}
.assist-card::before{
  content:"";
  position:absolute;top:-60px;right:-60px;
  width:180px;height:180px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(47,224,200,.16),transparent 70%);
  pointer-events:none;
}
.assist-card h3{font-size:19px;margin-bottom:10px}
.assist-card > p{font-size:14px;line-height:1.85;color:var(--t2);margin-bottom:18px}
.assist-list{margin-bottom:20px}
.assist-list li{
  position:relative;
  padding-left:20px;
  font-size:13.5px;
  line-height:1.85;
  color:var(--t2);
  margin-bottom:10px;
}
.assist-list li::before{
  content:"";
  position:absolute;
  left:0;top:9px;
  width:6px;height:6px;
  border-radius:2px;
  background:var(--accent);
  opacity:.85;
}
.assist-list li:last-child{margin-bottom:0}
.assist-meta{
  display:flex;align-items:center;gap:8px;
  font-size:12.5px;
  color:var(--t3);
  padding-top:16px;
  margin-top:18px;
  border-top:1px solid var(--line);
}
.assist-meta .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);flex:none}
.assist-card .btn{margin-bottom:10px}

/* CTA 转化条 */
.cta-band{padding:0 0 96px}
.cta-card{
  position:relative;
  border-radius:22px;
  border:1px solid rgba(140,170,255,.22);
  background:
    radial-gradient(110% 130% at 0% 0%,rgba(47,111,237,.24),transparent 58%),
    radial-gradient(90% 110% at 100% 100%,rgba(47,224,200,.14),transparent 55%),
    var(--bg-1);
  box-shadow:var(--shadow-card);
  padding:44px;
  display:grid;
  grid-template-columns:minmax(0,1fr) 320px;
  gap:44px;
  align-items:center;
  overflow:hidden;
}
.cta-card h2{font-size:clamp(1.5rem,2.6vw,2.1rem);margin-bottom:14px}
.cta-card p{font-size:15px;line-height:1.9;color:var(--t2);max-width:560px}
.cta-steps{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:14px;
  margin-top:26px;
}
.cta-step{
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--glass);
  padding:14px 14px 12px;
}
.cta-step .num{
  font-size:12px;font-weight:700;color:var(--accent);
  letter-spacing:.08em;
  display:block;margin-bottom:6px;
}
.cta-step strong{display:block;font-size:14px;color:var(--t1);margin-bottom:4px}
.cta-step span{font-size:12.5px;color:var(--t3);line-height:1.7}
.cta-actions{display:flex;flex-direction:column;gap:12px}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-2);
  border-top:1px solid var(--line);
  padding:72px 0 0;
  position:relative;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.65fr 1fr 1fr 1fr;
  gap:44px;
  padding-bottom:52px;
}
.footer-brand .brand{margin-bottom:16px}
.footer-brand > p{font-size:14px;line-height:1.85;color:var(--t2);max-width:340px;margin-bottom:18px}
.footer-contact{font-size:13px;color:var(--t3);line-height:2}
.footer-contact strong{color:var(--t2);font-weight:600}
.footer-col h4{font-size:14px;font-weight:600;color:var(--t1);margin-bottom:16px;letter-spacing:.02em}
.footer-col li{margin-bottom:11px}
.footer-col a{font-size:13.5px;color:var(--t3)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 0 26px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  color:var(--t3);
  flex-wrap:wrap;
}
.footer-bottom a{color:var(--t3);border-bottom:1px solid rgba(140,170,255,.22)}
.footer-bottom a:hover{color:var(--accent);border-bottom-color:var(--accent)}
.to-top{
  width:38px;height:38px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.16);
  background:rgba(120,160,255,.07);
  color:var(--t2);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.to-top:hover{
  color:var(--accent);
  border-color:var(--primary-2);
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(77,139,255,.5),0 10px 24px -8px rgba(47,111,237,.8);
}
.to-top svg{width:16px;height:16px}

/* ---------- 入场动画 ---------- */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
.reveal.in{opacity:1;transform:none}

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

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .nav-links{gap:18px}
  .nav-link{font-size:14px}
  .hero-grid{grid-template-columns:minmax(0,1fr) 280px;gap:36px}
  .layout{grid-template-columns:minmax(0,1fr) 300px;gap:32px}
  .cta-card{grid-template-columns:1fr;gap:28px;padding:36px}
  .cta-actions{flex-direction:row;flex-wrap:wrap}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:36px}
}
@media (max-width:1023px){
  .site-header{background:rgba(5,8,15,.86)}
  .nav-inner{height:64px}
  .mobile-toggle{display:inline-flex}
  .nav-actions .btn-primary{display:none}
  .nav-links{
    position:fixed;
    top:64px;left:0;right:0;bottom:0;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:24px 24px 120px;
    background:rgba(5,8,15,.97);
    -webkit-backdrop-filter:blur(20px);
    backdrop-filter:blur(20px);
    border-top:1px solid var(--line);
    transform:translateY(-12px);
    opacity:0;
    visibility:hidden;
    overflow-y:auto;
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
  }
  .nav-links.is-open{opacity:1;visibility:visible;transform:translateY(0)}
  .nav-link{
    font-size:18px;
    padding:17px 0;
    border-bottom:1px solid rgba(140,170,255,.12);
    color:var(--t1);
  }
  .nav-link::after{display:none}
  .nav-link.active{color:var(--accent)}
  .nav-cta-mobile{
    display:inline-flex;
    margin-top:28px;
    width:100%;
  }
  body.nav-open{overflow:hidden}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-aside{max-width:460px}
  .hero-stat{left:auto;right:12px;bottom:-16px}
  .layout{grid-template-columns:1fr;gap:40px}
  .assist-card{position:static}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  header .container,main .container,.site-footer .container{padding-inline:20px}
  .page-hero{padding:calc(var(--header-h) + 40px) 0 56px}
  .main-section{padding:56px 0 64px}
  .quick-grid{grid-template-columns:1fr;gap:14px;margin-bottom:44px}
  .faq-q{font-size:16px;padding:16px 16px;gap:10px}
  .faq-a-inner{padding:0 16px 18px 48px}
  .cta-band{padding-bottom:72px}
  .cta-card{padding:28px 22px}
  .cta-steps{grid-template-columns:1fr}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:14px}
  .hero-meta{gap:10px;font-size:12.5px}
}
@media (max-width:520px){
  .hero-title{font-size:1.72rem}
  .hero-desc{font-size:15.5px}
  .hero-figure{aspect-ratio:4/3}
  .hero-stat{position:static;margin-top:14px;left:auto;right:auto;bottom:auto;display:inline-flex}
  .btn{width:100%}
  .btn-sm{width:auto}
  .quick-card{padding:18px}
  .section-head h2{font-size:1.35rem}
}