/* roulang page: index */
:root{
  --brand:#5B3DF5;
  --brand-deep:#2B1B86;
  --accent:#FF6A3D;
  --ok:#12C9A0;
  --ink:#121016;
  --ink-2:#57515F;
  --ink-3:#9A94A6;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E8E4DD;
  --dark:#14121B;
  --radius-card:16px;
  --radius-sm:12px;
  --radius-btn:10px;
  --shadow-1:0 1px 2px rgba(18,16,22,.04), 0 8px 24px rgba(18,16,22,.06);
  --shadow-hover:0 12px 32px rgba(91,61,245,.14);
  --container:1200px;
  --narrow:760px;
  --wide:1120px;
  --sans:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC",system-ui,"Microsoft YaHei",sans-serif;
  --num:"Space Grotesk","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .18s ease,border-color .18s ease}
a:hover{color:var(--brand-deep)}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:none;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.2;letter-spacing:-.02em;font-weight:800}
h1{font-size:48px}
h2{font-size:36px}
h3{font-size:22px;line-height:1.4}
h4{font-size:18px;line-height:1.4}
p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.narrow{max-width:var(--narrow);margin:0 auto}
.font-num{font-family:var(--num);font-variant-numeric:tabular-nums;letter-spacing:0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;white-space:nowrap;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .12s ease,box-shadow .18s ease;
}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(91,61,245,.22)}
.btn-primary:hover{background:#4c2fe0;color:#fff;box-shadow:0 12px 26px rgba(91,61,245,.28)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgba(255,106,61,.22)}
.btn-accent:hover{background:#f0571f;color:#fff}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:#fff}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-lg{height:54px;padding:0 30px;font-size:16px}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}
.btn-dark{background:#fff;color:var(--dark)}
.btn-dark:hover{background:#EDE9FF;color:var(--brand-deep)}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:999px;
  font-size:12px;font-weight:700;letter-spacing:.02em;
  background:#F0EDFF;color:var(--brand-deep);border:1px solid #E1DBFF;
}
.badge-accent{background:#FFF0EA;color:#B33C13;border-color:#FFDCCF}
.badge-ok{background:#E7FBF5;color:#0A8E72;border-color:#CBF3E8}
.badge-muted{background:#F3F1EE;color:var(--ink-2);border-color:var(--line)}

.chip{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:999px;
  font-size:14px;font-weight:600;color:var(--ink-2);background:var(--surface);
  border:1px solid var(--line);transition:all .18s ease;
}
.chip:hover{border-color:var(--brand);color:var(--brand)}

.sec{padding:104px 0}
.sec-tight{padding:72px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px}
.sec-head .kicker{
  display:flex;align-items:center;gap:10px;margin-bottom:14px;
  font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--ink-3);text-transform:uppercase;
}
.sec-head .kicker::before{content:"";width:40px;height:4px;border-radius:2px;background:var(--brand)}
.sec-sub{margin-top:14px;color:var(--ink-2);font-size:16px;max-width:620px;line-height:1.85}
.sec-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;white-space:nowrap}

.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);transition:box-shadow .24s ease,transform .24s ease,border-color .24s ease;
}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);border-color:#DDD6FF}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,244,241,.86);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-bar{display:flex;align-items:center;gap:24px;height:80px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:34px;height:34px;flex-shrink:0}
.logo-text{font-size:17px;letter-spacing:-.01em;color:var(--ink);white-space:nowrap}
.logo-text b{font-weight:800}
.logo-text i{font-style:normal;font-weight:500;color:var(--ink-2)}
.nav-search{position:relative;flex:1;max-width:620px}
.nav-search form{display:flex;align-items:center;position:relative}
.nav-search .search-ico{position:absolute;left:16px;width:18px;height:18px;color:var(--ink-3);pointer-events:none}
.nav-search input{
  width:100%;height:48px;padding:0 88px 0 44px;
  border:1px solid var(--line);border-radius:999px;background:var(--surface);
  font-size:15px;color:var(--ink);transition:border-color .18s ease,box-shadow .18s ease;
}
.nav-search input::placeholder{color:var(--ink-3)}
.nav-search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(91,61,245,.18)}
.nav-search .clear-btn{
  position:absolute;right:66px;width:22px;height:22px;border-radius:50%;
  display:none;align-items:center;justify-content:center;color:var(--ink-3);background:#F1EFEC;
}
.nav-search input:not(:placeholder-shown)~.clear-btn{display:flex}
.nav-search .search-go{
  position:absolute;right:6px;height:36px;padding:0 18px;border-radius:999px;
  background:var(--brand);color:#fff;font-size:14px;font-weight:700;
}
.nav-search .search-go:hover{background:#4c2fe0}
.hotpanel{
  position:absolute;top:calc(100% + 8px);left:0;right:0;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  box-shadow:0 18px 40px rgba(18,16,22,.10);padding:16px 18px;
  opacity:0;visibility:hidden;transform:translateY(-6px);transition:all .18s ease;z-index:5;
}
.nav-search:focus-within .hotpanel{opacity:1;visibility:visible;transform:translateY(0)}
.hotpanel h4{font-size:12px;letter-spacing:.1em;color:var(--ink-3);margin-bottom:10px;text-transform:uppercase}
.hotpanel ul{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.hotpanel ul:last-child{margin-bottom:0}
.hotpanel li span{font-size:13px;color:var(--ink-2);background:#F6F4F1;border:1px solid var(--line);border-radius:999px;padding:4px 12px}
.nav-actions{display:flex;align-items:center;gap:14px;margin-left:auto;flex-shrink:0}
.nav-link{font-size:15px;font-weight:600;color:var(--ink-2);position:relative;padding:4px 0}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand);transition:width .18s ease}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{width:100%}
.nav-burger{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:var(--surface);align-items:center;justify-content:center}
.nav-burger svg{width:20px;height:20px}
.nav-cats{display:flex;justify-content:center;gap:10px;padding-bottom:16px;flex-wrap:wrap}
.cat-pill{
  display:inline-flex;align-items:center;height:36px;padding:0 18px;border-radius:999px;
  font-size:14px;font-weight:600;background:var(--surface);color:var(--ink-2);
  border:1px solid var(--line);transition:all .18s ease;
}
.cat-pill:hover{border-color:var(--brand);color:var(--brand)}
.cat-pill.active{background:var(--brand);color:#fff;border-color:var(--brand);box-shadow:0 6px 16px rgba(91,61,245,.24)}
.drawer-mask{position:fixed;inset:0;background:rgba(18,16,22,.45);opacity:0;visibility:hidden;transition:all .24s ease;z-index:90}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:300px;max-width:86vw;background:var(--surface);
  border-radius:20px 0 0 20px;padding:24px 22px;transform:translateX(100%);
  transition:transform .28s cubic-bezier(.16,.84,.44,1);z-index:100;overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-head strong{font-size:15px}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center}
.drawer nav a{display:block;padding:13px 0;font-size:16px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--line)}
.drawer nav a:hover{color:var(--brand)}
.drawer .btn{width:100%;margin-top:20px}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:104px 0 96px}
.hero::before{
  content:"";position:absolute;top:-140px;right:-160px;width:760px;height:680px;
  background:linear-gradient(135deg,rgba(91,61,245,.12),rgba(255,106,61,.06));
  transform:skewX(-14deg);border-radius:60px;pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;mask-image:radial-gradient(circle at 78% 34%,#000 0%,transparent 62%);
  -webkit-mask-image:radial-gradient(circle at 78% 34%,#000 0%,transparent 62%);
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.hero h1{font-size:52px;line-height:1.15;letter-spacing:-.03em}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero .lede{margin-top:22px;font-size:18px;color:var(--ink-2);max-width:520px;line-height:1.8}
.hero-cta{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.trust-row{display:flex;gap:22px;flex-wrap:wrap;margin-top:34px;padding-top:26px;border-top:1px dashed var(--line)}
.trust-row li{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-2);font-weight:600}
.trust-row svg{width:18px;height:18px;color:var(--brand)}
.hero-visual{position:relative}
.hero-visual img{border-radius:20px;object-fit:cover;aspect-ratio:4/3;width:100%;box-shadow:var(--shadow-1);border:1px solid var(--line)}
.float-card{
  position:absolute;left:-26px;bottom:-28px;width:270px;background:var(--surface);
  border:1px solid var(--line);border-radius:16px;padding:18px 20px;box-shadow:0 18px 40px rgba(18,16,22,.12);
}
.float-card .fc-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.float-card .fc-title{font-size:12px;letter-spacing:.08em;color:var(--ink-3);font-weight:700}
.float-card .fc-row{display:flex;align-items:center;justify-content:space-between;font-size:13px;padding:7px 0;border-bottom:1px dashed var(--line);color:var(--ink-2)}
.float-card .fc-row:last-child{border-bottom:0}
.float-card .fc-row b{font-family:var(--num);color:var(--ink);font-size:14px}
.dot-ok{width:8px;height:8px;border-radius:50%;background:var(--ok);display:inline-block;margin-right:6px}

/* ---------- 权益对比表 ---------- */
.compare-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface);box-shadow:var(--shadow-1)}
table.compare{width:100%;border-collapse:collapse;min-width:860px}
table.compare th,table.compare td{padding:0 22px;height:56px;text-align:left;font-size:15px;border-bottom:1px solid var(--line)}
table.compare tbody tr:last-child td{border-bottom:0}
table.compare thead th{height:auto;padding:22px;vertical-align:top;font-size:14px;font-weight:700;color:var(--ink-2);border-bottom:1px solid var(--line)}
table.compare thead th .plan{display:block;font-size:18px;font-weight:800;color:var(--ink);margin-bottom:6px}
table.compare thead th .price{display:block;font-family:var(--num);font-size:28px;font-weight:700;color:var(--ink);margin:8px 0 14px}
table.compare thead th .price small{font-size:13px;font-weight:500;color:var(--ink-3);margin-left:4px}
table.compare td:first-child{font-weight:600;color:var(--ink)}
table.compare th.col-hi,table.compare td.col-hi{background:#FFF7F4;position:relative}
table.compare thead th.col-hi{border-top:2px solid var(--accent)}
table.compare tbody tr:hover td.col-hi{background:#FFEFE9}
.tick{width:20px;height:20px;color:var(--ok)}
.dash{display:inline-block;width:14px;height:2px;background:var(--ink-3);border-radius:2px;vertical-align:middle}
.mobile-plan-switch{display:none;gap:8px;margin-bottom:16px;flex-wrap:wrap}
.scroll-hint{display:none;font-size:13px;color:var(--ink-3);margin-top:10px}

/* ---------- 等级阶梯 ---------- */
.steps{display:flex;flex-direction:column;gap:32px}
.step-item{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:40px;box-shadow:var(--shadow-1)}
.step-item:nth-child(even) .step-text{order:2}
.step-item:nth-child(even) .step-media{order:1}
.step-num{
  font-family:var(--num);font-size:64px;font-weight:700;line-height:1;
  color:rgba(91,61,245,.14);display:block;margin-bottom:12px;letter-spacing:-.04em;
}
.step-text h3{margin-bottom:12px}
.step-text .desc{color:var(--ink-2);font-size:15px;margin-bottom:20px}
.step-list{display:flex;flex-direction:column;gap:11px}
.step-list li{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:var(--ink-2)}
.step-list svg{width:19px;height:19px;color:var(--brand);flex-shrink:0;margin-top:4px}
.step-media img{border-radius:14px;object-fit:cover;aspect-ratio:4/3;width:100%;border:1px solid var(--line)}
.step-arrow{display:inline-flex;align-items:center;gap:6px;margin-top:22px;font-size:14px;font-weight:700;color:var(--brand)}
.step-arrow svg{width:16px;height:16px;transition:transform .18s ease}
.step-arrow:hover svg{transform:translateX(4px)}

/* ---------- 专属内容预览 ---------- */
.mosaic{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.mo-card{display:flex;flex-direction:column;overflow:hidden;padding:0}
.mo-card.wide{grid-column:span 2;flex-direction:row}
.mo-card.wide .mo-media{flex:0 0 52%}
.mo-card.wide .mo-body{padding:32px}
.mo-media{position:relative;overflow:hidden;background:#EFEDEA}
.mo-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/9;transition:transform .3s ease}
.mo-card:hover .mo-media img{transform:scale(1.03)}
.mo-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1}
.mo-body h3{margin:12px 0 10px;font-size:19px}
.mo-body p{color:var(--ink-2);font-size:14px;line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.mo-foot{margin-top:auto;padding-top:18px;display:flex;align-items:center;justify-content:space-between}
.lock{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--ink-3);font-weight:600}
.lock svg{width:15px;height:15px}
.mo-foot .go{display:inline-flex;align-items:center;color:var(--brand)}
.mo-foot .go svg{width:18px;height:18px;transition:transform .2s ease}
.mo-card:hover .mo-foot .go svg{transform:translateX(4px)}

/* ---------- 最新信息 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{display:flex;flex-direction:column;overflow:hidden;padding:0}
.post-media{overflow:hidden;background:#EFEDEA}
.post-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s ease}
.post-card:hover .post-media img{transform:scale(1.03)}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.post-body h3{font-size:17px;line-height:1.5;margin:12px 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-body h3 a{color:var(--ink)}
.post-body h3 a:hover{color:var(--brand)}
.post-body p{font-size:14px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-3)}
.empty-state{
  grid-column:1/-1;min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:12px;background:var(--surface);border:1px dashed var(--line);border-radius:var(--radius-card);text-align:center;padding:40px;
}
.empty-state svg{width:56px;height:56px;color:var(--ink-3)}
.empty-state p{color:var(--ink-2);font-size:15px}

/* ---------- FAQ ---------- */
.faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item.open{border-left:3px solid var(--brand);box-shadow:var(--shadow-1)}
.faq-q{display:flex;align-items:center;gap:16px;width:100%;padding:20px 22px;text-align:left;font-size:16px;font-weight:700;color:var(--ink)}
.faq-q .qn{font-family:var(--num);font-size:14px;color:var(--ink-3);flex-shrink:0;width:26px}
.faq-q .chev{margin-left:auto;width:18px;height:18px;color:var(--ink-3);transition:transform .24s ease;flex-shrink:0}
.faq-item.open .faq-q .chev{transform:rotate(180deg);color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
.faq-a p{padding:0 22px 22px 64px;color:var(--ink-2);font-size:15px;line-height:1.9}

/* ---------- CTA ---------- */
.cta-block{
  position:relative;overflow:hidden;background:var(--dark);border-radius:20px;
  padding:56px;display:grid;grid-template-columns:1fr auto;gap:36px;align-items:center;
}
.cta-block::before{
  content:"";position:absolute;top:-180px;right:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(91,61,245,.42),transparent 68%);
}
.cta-block::after{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(115deg,rgba(255,255,255,.045) 0 2px,transparent 2px 12px);
  pointer-events:none;
}
.cta-block>*{position:relative;z-index:2}
.cta-block h2{color:#fff;font-size:32px}
.cta-block p{margin-top:14px;color:#B9B4C4;font-size:15px;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#B9B4C4;margin-top:104px;padding:72px 0 0}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.site-footer .logo-text{color:#fff}
.site-footer .logo-text i{color:#B9B4C4}
.foot-brand p{margin-top:18px;font-size:14px;line-height:1.9;color:#9A94A6;max-width:300px}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:18px;font-weight:700}
.foot-col ul{display:flex;flex-direction:column;gap:10px}
.foot-col a{color:#B9B4C4;font-size:14px;border-bottom:2px solid transparent;padding-bottom:2px;display:inline-block}
.foot-col a:hover{color:#fff;border-bottom-color:var(--brand)}
.foot-col li span{font-size:14px;color:#9A94A6}
.foot-bottom{margin-top:56px;border-top:1px solid rgba(255,255,255,.08);padding:24px 0 32px}
.foot-bottom .row{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:13px;color:#8A8494}
.foot-bottom .row p{line-height:1.9}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s cubic-bezier(.16,.84,.44,1),transform .4s cubic-bezier(.16,.84,.44,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  h1{font-size:42px}
  .hero h1{font-size:44px}
  h2{font-size:32px}
  .sec{padding:88px 0}
}
@media (max-width:1023px){
  .nav-search{max-width:420px}
  .nav-cats{gap:8px}
  .cat-pill{padding:0 14px;font-size:13px}
  .hero{padding:76px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:64px}
  .hero h1{font-size:40px}
  .float-card{left:auto;right:16px;bottom:-24px;width:250px}
  .mosaic{grid-template-columns:repeat(2,1fr)}
  .mo-card.wide{grid-column:span 2}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .step-item{padding:32px;gap:32px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:36px}
  .cta-block{padding:44px}
}
@media (max-width:767px){
  body{font-size:15px}
  h1{font-size:30px}
  h2{font-size:26px}
  .sec{padding:56px 0}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:32px}
  .nav-bar{height:auto;padding-top:12px;padding-bottom:12px;flex-wrap:wrap;row-gap:12px;gap:12px}
  .nav-search{order:3;flex-basis:100%;max-width:none}
  .nav-actions .nav-link,.nav-actions .btn{display:none}
  .nav-burger{display:flex}
  .nav-cats{justify-content:flex-start;overflow-x:auto;padding-bottom:12px;flex-wrap:nowrap;-webkit-overflow-scrolling:touch}
  .nav-cats::-webkit-scrollbar{display:none}
  .hero{padding:56px 0 64px}
  .hero h1{font-size:31px}
  .hero .lede{font-size:16px}
  .hero-cta .btn{flex:1 1 auto}
  .hero-visual img{aspect-ratio:16/11}
  .float-card{position:static;width:100%;margin-top:16px;box-shadow:var(--shadow-1)}
  .step-item{grid-template-columns:1fr;padding:26px;gap:24px}
  .step-item:nth-child(even) .step-text,.step-item:nth-child(even) .step-media{order:0}
  .step-num{font-size:48px}
  .mosaic{grid-template-columns:1fr}
  .mo-card.wide{grid-column:span 1;flex-direction:column}
  .mo-card.wide .mo-media{flex:none}
  .mo-card.wide .mo-body{padding:22px 24px 24px}
  .post-grid{grid-template-columns:1fr}
  .mobile-plan-switch{display:flex}
  .scroll-hint{display:block}
  .cta-block{grid-template-columns:1fr;padding:32px 24px;border-radius:16px}
  .cta-block h2{font-size:24px}
  .cta-actions .btn{width:100%}
  .faq-a p{padding-left:22px}
  .site-footer{margin-top:56px;padding-top:48px}
  .foot-grid{grid-template-columns:1fr}
}
@media (max-width:420px){
  h1,.hero h1{font-size:27px}
  h2{font-size:23px}
  .container{padding:0 18px}
  .btn{width:100%}
  .nav-actions .search-go{padding:0 14px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --brand:#5B3DF5;
  --brand-deep:#2B1B86;
  --accent:#FF6A3D;
  --ok:#12C9A0;
  --ink:#121016;
  --ink-2:#57515F;
  --ink-3:#9A94A6;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E8E4DD;
  --dark:#14121B;
  --radius-lg:20px;
  --radius:16px;
  --radius-sm:12px;
  --radius-btn:10px;
  --shadow:0 1px 2px rgba(18,16,22,.04),0 8px 24px rgba(18,16,22,.06);
  --shadow-hover:0 12px 32px rgba(91,61,245,.14);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC",system-ui,"Microsoft YaHei",sans-serif;
  --font-num:"Space Grotesk","IBM Plex Mono",ui-monospace,monospace;
  --danger:#E5484D;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-deep);}
button,input{font-family:inherit;font-size:inherit;}
button{cursor:pointer;}
h1,h2,h3,h4{margin:0;font-weight:750;line-height:1.22;letter-spacing:-.02em;color:var(--ink);}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}

.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,241,.9);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-bar{display:flex;align-items:center;gap:24px;height:80px;}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);flex:0 0 auto;}
.logo:hover{color:var(--ink);}
.logo-mark{width:38px;height:38px;flex:0 0 auto;}
.logo-text{font-size:19px;letter-spacing:-.01em;line-height:1;}
.logo-text b{font-weight:800;}
.logo-text i{font-style:normal;font-weight:500;color:var(--ink-2);}

.nav-search{position:relative;flex:1 1 auto;max-width:640px;margin:0 auto;}
.nav-search form{
  display:flex;align-items:center;gap:8px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:999px;
  padding:5px 6px 5px 16px;
  box-shadow:var(--shadow);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search form:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(91,61,245,.18);}
.search-ico{width:18px;height:18px;color:var(--ink-3);flex:0 0 auto;}
.nav-search input[type="search"]{
  flex:1 1 auto;border:0;background:transparent;height:38px;
  font-size:14px;color:var(--ink);min-width:0;
}
.nav-search input[type="search"]::placeholder{color:var(--ink-3);}
.nav-search input[type="search"]:focus{outline:none;}
.clear-btn{
  width:24px;height:24px;border:0;border-radius:999px;background:#EFEBE5;color:var(--ink-2);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.clear-btn:hover{background:#E3DED6;color:var(--ink);}
.search-go{
  border:0;border-radius:999px;background:var(--brand);color:#fff;
  font-size:14px;font-weight:600;padding:9px 20px;flex:0 0 auto;
  transition:background .18s ease,transform .12s ease;
}
.search-go:hover{background:#4A2FE0;}
.search-go:active{transform:scale(.98);}
.hotpanel{
  position:absolute;top:calc(100% + 10px);left:0;right:0;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:18px 20px;
  display:grid;grid-template-columns:1fr 1fr;gap:6px 28px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s;
}
.nav-search:focus-within .hotpanel{opacity:1;visibility:visible;transform:translateY(0);}
.hotpanel h4{font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--ink-3);text-transform:uppercase;margin-bottom:6px;}
.hotpanel ul{margin-bottom:10px;}
.hotpanel li{font-size:14px;color:var(--ink-2);padding:4px 0;border-bottom:1px dashed var(--line);}
.hotpanel li:last-child{border-bottom:0;}

.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-link{font-size:14px;font-weight:600;color:var(--ink-2);padding:6px 2px;position:relative;}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .18s ease;
}
.nav-link:hover{color:var(--brand);}
.nav-link:hover::after{transform:scaleX(1);}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);border:1px solid transparent;
  font-weight:650;font-size:15px;padding:12px 22px;line-height:1.2;
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .12s ease;
}
.btn:active{transform:scale(.98);}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none;}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:#4A2FE0;color:#fff;box-shadow:var(--shadow-hover);}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-accent{background:var(--accent);color:#fff;}
.btn-accent:hover{background:#ED5A2C;color:#fff;}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:9px;}

.nav-burger{
  display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:11px;
  background:var(--surface);align-items:center;justify-content:center;flex:0 0 auto;
}
.nav-burger svg{width:20px;height:20px;}

.nav-cats{
  display:flex;justify-content:center;gap:10px;flex-wrap:wrap;
  padding:0 24px 14px;
}
.cat-pill{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13.5px;font-weight:600;color:var(--ink-2);
  background:var(--surface);border:1px solid var(--line);border-radius:999px;
  padding:7px 16px;transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.cat-pill:hover{border-color:var(--brand);color:var(--brand);}
.cat-pill.is-active{background:var(--brand);border-color:var(--brand);color:#fff;}

/* ---------- drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(18,16,22,.45);opacity:0;visibility:hidden;
  transition:opacity .24s ease,visibility .24s;z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:290px;background:var(--surface);
  border-radius:20px 0 0 20px;padding:26px 22px;z-index:80;
  transform:translateX(102%);transition:transform .28s cubic-bezier(.16,.84,.44,1);
  display:flex;flex-direction:column;gap:8px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer h3{font-size:12px;letter-spacing:.08em;color:var(--ink-3);margin:14px 0 4px;font-weight:700;}
.drawer a{font-size:15px;font-weight:600;color:var(--ink);padding:10px 2px;border-bottom:1px solid var(--line);}
.drawer a:hover{color:var(--brand);}
.drawer .btn{margin-top:16px;}

/* ---------- breadcrumb ---------- */
.crumb-wrap{border-bottom:1px solid var(--line);background:var(--surface);}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:14px 0;font-size:13.5px;color:var(--ink-3);}
.crumb a{color:var(--ink-2);}
.crumb a:hover{color:var(--brand);}
.crumb span.sep{color:var(--ink-3);}
.crumb .now{color:var(--ink);font-weight:600;}

/* ---------- article hero ---------- */
.article-hero{
  position:relative;overflow:hidden;
  background:var(--surface);border-bottom:1px solid var(--line);
  padding:52px 0 44px;
}
.article-hero::after{
  content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;
  background:linear-gradient(135deg,rgba(91,61,245,.14),rgba(255,106,61,.06) 55%,transparent 75%);
  transform:skewX(-14deg);border-radius:48px;pointer-events:none;
}
.article-hero .container{position:relative;z-index:1;}
.hero-inner{max-width:880px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:700;letter-spacing:.03em;
  padding:5px 13px;border-radius:999px;
  background:rgba(91,61,245,.1);color:var(--brand-deep);
}
.article-hero h1{
  font-size:48px;font-weight:800;letter-spacing:-.025em;line-height:1.18;
  margin:20px 0 18px;
}
.meta-row{
  display:flex;flex-wrap:wrap;gap:10px 22px;font-size:13.5px;color:var(--ink-3);
  font-family:var(--font-num);font-feature-settings:"tnum";
}
.meta-row b{color:var(--ink-2);font-weight:600;}
.lede{
  margin-top:20px;font-size:17px;line-height:1.85;color:var(--ink-2);
  border-left:3px solid var(--accent);padding-left:16px;max-width:760px;
}

/* ---------- layout ---------- */
.layout{
  display:grid;grid-template-columns:minmax(0,760px) 280px;
  gap:56px;justify-content:center;
  padding:64px 0 88px;align-items:start;
}
.article-main{min-width:0;}
.article-body{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:38px 40px;
  font-size:16px;line-height:1.9;color:var(--ink-2);
}
.article-body h2{
  font-size:26px;color:var(--ink);margin:40px 0 14px;padding-left:14px;position:relative;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.34em;width:4px;height:20px;border-radius:3px;background:var(--brand);
}
.article-body h2:first-child{margin-top:0;}
.article-body h3{font-size:19px;color:var(--ink);margin:28px 0 10px;}
.article-body p{margin:14px 0;}
.article-body a{font-weight:600;border-bottom:1px solid rgba(91,61,245,.35);}
.article-body strong{color:var(--ink);font-weight:700;}
.article-body ul,.article-body ol{margin:14px 0;padding-left:2px;}
.article-body li{position:relative;padding-left:24px;margin:9px 0;}
.article-body ul>li::before{
  content:"";position:absolute;left:6px;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--brand);
}
.article-body ol{counter-reset:li;}
.article-body ol>li{counter-increment:li;padding-left:34px;}
.article-body ol>li::before{
  content:counter(li,decimal-leading-zero);
  position:absolute;left:0;top:0;font-family:var(--font-num);font-size:13px;font-weight:700;
  color:var(--brand);line-height:2.3;
}
.article-body img{border-radius:14px;margin:22px 0;object-fit:cover;width:100%;height:auto;background:var(--bg);}
.article-body blockquote{
  margin:22px 0;padding:16px 20px;background:#FBF7F3;border-left:4px solid var(--accent);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--ink-2);font-size:15px;
}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:14.5px;}
.article-body th,.article-body td{border-bottom:1px solid var(--line);padding:14px 12px;text-align:left;}
.article-body th{background:#FAF8F5;font-weight:700;color:var(--ink);}
.article-body code{font-family:var(--font-num);background:#F2EFEA;padding:2px 6px;border-radius:6px;font-size:14px;}

.empty-state{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:64px 32px;text-align:center;min-height:240px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
}
.empty-state svg{width:72px;height:72px;color:var(--ink-3);}
.empty-state h2{font-size:22px;}
.empty-state p{color:var(--ink-2);font-size:15px;}

/* ---------- sidebar ---------- */
.sidebar{position:sticky;top:110px;display:flex;flex-direction:column;gap:18px;}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:20px 22px;
}
.side-card h3{
  font-size:13px;letter-spacing:.08em;color:var(--ink-3);font-weight:700;margin-bottom:12px;
}
.side-card ul li{border-bottom:1px solid var(--line);}
.side-card ul li:last-child{border-bottom:0;}
.side-card ul a{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 0;font-size:14.5px;color:var(--ink-2);font-weight:600;}
.side-card ul a:hover{color:var(--brand);}
.side-card ul a svg{width:14px;height:14px;transition:transform .18s ease;flex:0 0 auto;}
.side-card ul a:hover svg{transform:translateX(4px);}
.side-note{font-size:13.5px;color:var(--ink-2);line-height:1.8;}
.side-toggle{
  display:none;width:100%;align-items:center;justify-content:space-between;gap:10px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:13px 18px;font-weight:650;font-size:14.5px;color:var(--ink);margin-bottom:16px;
}
.side-toggle svg{width:16px;height:16px;transition:transform .24s ease;}
.side-toggle[aria-expanded="true"] svg{transform:rotate(180deg);}

/* ---------- tags & related ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;align-items:center;}
.tag{
  font-size:13px;font-weight:600;color:var(--ink-2);background:var(--surface);
  border:1px solid var(--line);border-radius:999px;padding:6px 14px;transition:border-color .18s,color .18s;
}
.tag:hover{border-color:var(--brand);color:var(--brand);}
.tag-row .label{font-size:13px;color:var(--ink-3);margin-right:2px;}

.back-line{margin-top:22px;}
.back-line a{display:inline-flex;align-items:center;gap:8px;font-size:14.5px;font-weight:650;}

.section-head{margin:0 0 28px;}
.section-head h2{font-size:28px;}
.section-head .bar{display:block;width:40px;height:4px;border-radius:3px;background:var(--accent);margin-top:14px;}

.related{padding:0 0 92px;}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px;}
.card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#DDD6FF;}
.card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg);}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.card:hover .thumb img{transform:scale(1.03);}
.card .thumb .mini-badge{
  position:absolute;left:12px;top:12px;background:rgba(20,18,27,.78);color:#fff;
  font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;
}
.card .body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card h3{font-size:17.5px;line-height:1.4;}
.card p{font-size:14px;color:var(--ink-2);line-height:1.75;}
.card .foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-family:var(--font-num);font-size:12.5px;color:var(--ink-3);
}
.card .foot svg{width:16px;height:16px;color:var(--brand);transition:transform .2s ease;}
.card:hover .foot svg{transform:translateX(4px);}

/* ---------- CTA ---------- */
.cta-bar{
  background:var(--dark);border-radius:20px;color:#fff;overflow:hidden;position:relative;
  padding:44px 48px;display:flex;align-items:center;justify-content:space-between;gap:32px;
  margin-bottom:92px;
}
.cta-bar::before{
  content:"";position:absolute;inset:-40% -10% auto auto;width:520px;height:520px;
  background:radial-gradient(circle,rgba(91,61,245,.5),transparent 62%);
  pointer-events:none;
}
.cta-bar::after{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(115deg,rgba(255,255,255,.045) 0 2px,transparent 2px 14px);
  pointer-events:none;
}
.cta-bar > *{position:relative;z-index:1;}
.cta-bar h2{font-size:26px;color:#fff;margin-bottom:8px;}
.cta-bar p{color:#B9B4C4;font-size:15px;max-width:560px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex:0 0 auto;}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:#B9B4C4;padding:68px 0 26px;margin-top:0;}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.09);}
.site-footer .logo-text{color:#fff;}
.site-footer .logo-text i{color:#B9B4C4;}
.foot-brand p{margin-top:16px;font-size:14px;line-height:1.9;max-width:320px;}
.foot-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;}
.foot-col ul li{margin-bottom:10px;}
.foot-col ul a,.foot-col ul span{color:#B9B4C4;font-size:14px;position:relative;}
.foot-col ul a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .18s ease;
}
.foot-col ul a:hover{color:#fff;}
.foot-col ul a:hover::after{transform:scaleX(1);}
.foot-bottom{padding-top:22px;}
.foot-bottom .row{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;}
.foot-bottom p{font-size:13px;color:#8B8598;line-height:1.9;}

/* ---------- motion ---------- */
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  html{scroll-behavior:auto;}
}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .layout{grid-template-columns:minmax(0,1fr) 260px;gap:36px;}
  .article-hero h1{font-size:42px;}
}
@media (max-width:1023px){
  .nav-search{max-width:none;}
  .hotpanel{display:none;}
  .layout{grid-template-columns:minmax(0,1fr);gap:0;padding:48px 0 72px;}
  .sidebar{position:static;margin-bottom:0;}
  .sidebar .side-card{display:none;}
  .sidebar.is-open .side-card{display:block;}
  .sidebar.is-open{display:flex;margin-top:18px;}
  .side-toggle{display:flex;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .article-hero h1{font-size:36px;}
  .cta-bar{flex-direction:column;align-items:flex-start;padding:36px 30px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .nav-bar{height:auto;padding:12px 0;flex-wrap:wrap;gap:12px;}
  .nav-search{order:3;flex-basis:100%;max-width:none;margin:0;}
  .nav-search form{padding-left:14px;}
  .nav-search input[type="search"]{height:34px;font-size:14px;}
  .search-go{padding:8px 16px;font-size:13.5px;}
  .nav-burger{display:inline-flex;}
  .nav-actions .nav-link{display:none;}
  .nav-actions .btn-sm{display:none;}
  .nav-cats{justify-content:flex-start;flex-wrap:nowrap;overflow-x:auto;padding:0 18px 12px;gap:8px;}
  .nav-cats::-webkit-scrollbar{display:none;}
  .cat-pill{white-space:nowrap;}
  .article-hero{padding:34px 0 30px;}
  .article-hero h1{font-size:29px;}
  .lede{font-size:15.5px;}
  .article-body{padding:24px 20px;font-size:15.5px;}
  .article-body h2{font-size:22px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
  .card-grid{grid-template-columns:minmax(0,1fr);}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .foot-grid{grid-template-columns:1fr;gap:30px;}
  .foot-bottom .row{flex-direction:column;}
  .related{padding-bottom:64px;}
  .cta-bar{margin-bottom:64px;}
}
@media (max-width:420px){
  .article-hero h1{font-size:25px;}
  .section-head h2{font-size:23px;}
  .cta-bar h2{font-size:22px;}
}

/* roulang page: category1 */
:root{
  --brand:#5B3DF5;
  --brand-deep:#2B1B86;
  --accent:#FF6A3D;
  --ok:#12C9A0;
  --ink:#121016;
  --ink-2:#57515F;
  --ink-3:#9A94A6;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E8E4DD;
  --dark:#14121B;
  --radius-card:16px;
  --radius-sm:12px;
  --radius-btn:10px;
  --radius-img:14px;
  --shadow:0 1px 2px rgba(18,16,22,.04),0 8px 24px rgba(18,16,22,.06);
  --shadow-hover:0 12px 32px rgba(91,61,245,.14);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC",system-ui,"Microsoft YaHei",sans-serif;
  --font-num:"Space Grotesk","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-img)}
a{color:var(--brand);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-deep)}
button{font-family:inherit;cursor:pointer}
input{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.22;letter-spacing:-.02em;font-weight:800}
h1{font-size:48px}
h2{font-size:28px}
h3{font-size:18px;font-weight:700;letter-spacing:0}
h4{font-size:16px;font-weight:700;letter-spacing:0}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.container{width:min(1200px,100% - 48px);margin:0 auto}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:-.01em}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:700;border:1px solid transparent;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .12s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.btn:active{transform:scale(.98)}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;pointer-events:none}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:#4a2fdd;color:#fff}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#ef5a2c;color:#fff}
.btn-outline{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn-ghost-dark{background:transparent;color:#fff;border-color:rgba(255,255,255,.35)}
.btn-ghost-dark:hover{border-color:#fff;color:#fff}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,241,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-bar{display:flex;align-items:center;gap:24px;height:80px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:none}
.logo-mark{width:38px;height:38px;flex:none}
.logo-text{font-size:18px;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.logo-text b{font-weight:800}
.logo-text i{font-style:normal;font-weight:500;color:var(--ink-2)}
.logo:hover .logo-text i{color:var(--brand)}
.nav-search{position:relative;flex:1;max-width:620px}
.nav-search form{
  display:flex;align-items:center;gap:10px;
  height:48px;padding:0 6px 0 16px;
  background:var(--surface);border:1px solid var(--line);border-radius:999px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search form:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(91,61,245,.18)}
.search-ico{width:18px;height:18px;color:var(--ink-3);flex:none}
.nav-search input[type=search]{
  flex:1;min-width:0;height:100%;border:0;background:transparent;outline:none;
  font-size:14.5px;color:var(--ink);
}
.nav-search input[type=search]::placeholder{color:var(--ink-3)}
.clear-btn{
  width:24px;height:24px;flex:none;display:none;align-items:center;justify-content:center;
  border:0;border-radius:50%;background:var(--bg);color:var(--ink-2);
}
.nav-search input[type=search]:not(:placeholder-shown) ~ .clear-btn{display:inline-flex}
.search-go{
  height:38px;padding:0 20px;flex:none;border:0;border-radius:999px;
  background:var(--brand);color:#fff;font-size:14px;font-weight:700;
  transition:background-color .18s ease,transform .12s ease;
}
.search-go:hover{background:#4a2fdd}
.search-go:active{transform:scale(.98)}
.hotpanel{
  position:absolute;left:0;right:0;top:calc(100% + 10px);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);
  box-shadow:var(--shadow);padding:18px 20px;display:grid;grid-template-columns:1fr 1fr;gap:6px 24px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s;
}
.nav-search:focus-within .hotpanel{opacity:1;visibility:visible;transform:translateY(0)}
.hotpanel h4{font-size:12px;color:var(--ink-3);font-weight:700;margin-bottom:8px;letter-spacing:.04em}
.hotpanel ul{margin-bottom:8px}
.hotpanel li{padding:5px 0;font-size:14px;color:var(--ink-2);cursor:pointer;transition:color .16s ease}
.hotpanel li:hover{color:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:16px;flex:none}
.nav-link{font-size:15px;font-weight:600;color:var(--ink);position:relative;padding:4px 0}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .18s ease;
}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-burger{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:var(--surface);
  align-items:center;justify-content:center;
}
.nav-burger svg{width:22px;height:22px}
.nav-cats{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;padding-bottom:14px}
.cat-pill{
  display:inline-flex;align-items:center;height:34px;padding:0 18px;border-radius:999px;
  font-size:14px;font-weight:600;color:var(--ink-2);
  background:var(--surface);border:1px solid var(--line);
  transition:border-color .18s ease,color .18s ease,background-color .18s ease;
}
.cat-pill:hover{border-color:var(--brand);color:var(--brand)}
.cat-pill.is-active{background:var(--brand);border-color:var(--brand);color:#fff}

/* ---------- drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(18,16,22,.45);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:90;
  background:var(--surface);border-radius:20px 0 0 20px;
  padding:22px;display:flex;flex-direction:column;gap:10px;
  transform:translateX(102%);transition:transform .28s cubic-bezier(.16,.84,.44,1);
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.drawer-close{width:38px;height:38px;border:1px solid var(--line);border-radius:10px;background:var(--surface);display:flex;align-items:center;justify-content:center}
.drawer-close svg{width:18px;height:18px}
.drawer a.drawer-link{
  display:block;padding:13px 14px;border-radius:12px;font-size:15px;font-weight:600;color:var(--ink);
  transition:background-color .16s ease,color .16s ease;
}
.drawer a.drawer-link:hover{background:var(--bg);color:var(--brand)}
.drawer a.drawer-link.is-active{background:rgba(91,61,245,.08);color:var(--brand)}

/* ---------- layout helpers ---------- */
.section{padding:96px 0}
.section-tight{padding:72px 0}
.sec-head{margin-bottom:40px;max-width:760px}
.sec-head h2{position:relative;padding-top:16px}
.sec-head h2::before{
  content:"";position:absolute;top:0;left:0;width:40px;height:4px;border-radius:999px;background:var(--brand);
}
.sec-head p{margin-top:14px;color:var(--ink-2);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 14px;border-radius:999px;
  background:rgba(91,61,245,.1);color:var(--brand-deep);font-size:13px;font-weight:700;
}

/* ---------- breadcrumb ---------- */
.crumb{padding:22px 0 0;font-size:13px;color:var(--ink-3)}
.crumb span{color:var(--ink-3)}
.crumb .sep{margin:0 8px;color:var(--ink-3)}
.crumb b{color:var(--ink-2);font-weight:600}

/* ---------- page hero ---------- */
.page-hero{position:relative;padding:36px 0 88px;overflow:hidden}
.page-hero .glow{
  position:absolute;right:-140px;top:-120px;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,rgba(91,61,245,.16),rgba(91,61,245,0) 68%);
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-copy h1{margin:18px 0 18px;font-size:56px}
.hero-copy h1 em{font-style:normal;color:var(--brand)}
.hero-copy .lede{font-size:17px;color:var(--ink-2);max-width:560px;line-height:1.9}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.fact{
  display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 14px;
  background:var(--surface);border:1px solid var(--line);border-radius:999px;
  font-size:13px;font-weight:600;color:var(--ink-2);
}
.fact svg{width:15px;height:15px;color:var(--ok);flex:none}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-visual{position:relative}
.hero-visual .frame{
  border-radius:20px;overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);background:var(--bg);aspect-ratio:4/3;
}
.hero-visual .frame img{width:100%;height:100%;object-fit:cover;border-radius:0}
.float-card{
  position:absolute;left:-26px;bottom:-26px;width:264px;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  padding:16px 18px;box-shadow:0 12px 32px rgba(18,16,22,.12);
}
.float-card h4{font-size:13px;color:var(--ink-3);font-weight:700;margin-bottom:10px;letter-spacing:.03em}
.float-row{display:flex;align-items:center;justify-content:space-between;padding:7px 0;font-size:13.5px;color:var(--ink-2)}
.float-row b{font-family:var(--font-num);font-weight:600;color:var(--ink)}
.dot-ok{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--ok);margin-right:8px}

/* ---------- security two-column ---------- */
.sec-layout{display:grid;grid-template-columns:268px minmax(0,1fr);gap:56px;align-items:start}
.toc{
  position:sticky;top:150px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px 20px;box-shadow:var(--shadow);
}
.toc-title{font-size:13px;color:var(--ink-3);font-weight:700;letter-spacing:.06em;margin-bottom:14px}
.toc ol{display:flex;flex-direction:column;gap:2px}
.toc-link{
  display:flex;gap:10px;padding:9px 10px;border-radius:10px;font-size:14px;color:var(--ink-2);font-weight:500;
  border-left:2px solid transparent;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.toc-link .idx{font-family:var(--font-num);color:var(--ink-3);flex:none;font-size:13px}
.toc-link:hover{background:var(--bg);color:var(--brand)}
.toc-link.is-active{background:rgba(91,61,245,.08);color:var(--brand-deep);border-left-color:var(--brand);font-weight:700}
.toc-note{
  margin-top:18px;padding:14px 14px;border-radius:12px;background:var(--bg);
  font-size:13px;color:var(--ink-2);line-height:1.75;
}
.toc-note b{color:var(--ink)}

.sec-stream{display:flex;flex-direction:column;gap:32px}
.sec-block{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:32px 34px 34px;box-shadow:var(--shadow);
  scroll-margin-top:150px;
  transition:box-shadow .24s ease,transform .24s ease;
}
.sec-block:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.block-num{
  font-family:var(--font-num);font-size:44px;line-height:1;font-weight:700;
  color:rgba(91,61,245,.16);letter-spacing:-.03em;
}
.sec-block h3{margin:8px 0 14px;font-size:22px;font-weight:800}
.sec-block p{color:var(--ink-2);font-size:15.5px;line-height:1.9}
.sec-block p + p{margin-top:12px}
.alert{
  margin-top:20px;padding:16px 20px;border-left:4px solid var(--accent);
  background:#FFF4EF;border-radius:0 12px 12px 0;font-size:14.5px;color:#8A3A1C;
  display:flex;gap:12px;align-items:flex-start;
}
.alert svg{width:18px;height:18px;flex:none;margin-top:4px;color:var(--accent)}
.inline-list{margin-top:18px;display:grid;gap:10px}
.inline-list li{
  display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--ink-2);
  padding-bottom:10px;border-bottom:1px dashed var(--line);
}
.inline-list li:last-child{border-bottom:0;padding-bottom:0}
.inline-list .mk{
  font-family:var(--font-num);font-size:12px;color:var(--brand);background:rgba(91,61,245,.1);
  border-radius:6px;padding:2px 8px;flex:none;margin-top:4px;
}

/* ---------- scenes ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.scene-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;
  transition:transform .22s ease,box-shadow .22s ease;
}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.scene-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--bg)}
.scene-card .thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .3s ease}
.scene-card:hover .thumb img{transform:scale(1.03)}
.scene-card .body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.scene-card h3{font-size:16.5px}
.scene-card p{font-size:14px;color:var(--ink-2);line-height:1.8;flex:1}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:rgba(18,201,160,.12);color:#077a60;font-size:12px;font-weight:700;align-self:flex-start;
}
.badge.purple{background:rgba(91,61,245,.1);color:var(--brand-deep)}
.badge.orange{background:rgba(255,106,61,.12);color:#A83C13}

/* ---------- checklist ---------- */
.checklist-wrap{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:38px 40px;box-shadow:var(--shadow);
}
.checklist{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 32px;margin-top:26px}
.checklist li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--ink-2);line-height:1.8}
.checklist .tick{
  width:22px;height:22px;flex:none;margin-top:4px;border-radius:50%;
  background:var(--ok);display:flex;align-items:center;justify-content:center;
}
.checklist .tick svg{width:13px;height:13px;color:#fff}

/* ---------- FAQ ---------- */
.faq{max-width:800px;margin:0 auto}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:12px;margin-bottom:12px;
  overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:#D8D2C9}
.faq-item.is-open{border-color:var(--brand);box-shadow:0 8px 24px rgba(91,61,245,.1)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;
  padding:18px 22px;background:transparent;border:0;text-align:left;
  font-size:15.5px;font-weight:700;color:var(--ink);line-height:1.6;
  border-left:3px solid transparent;transition:border-color .2s ease;
}
.faq-item.is-open .faq-q{border-left-color:var(--brand);color:var(--brand-deep)}
.faq-idx{font-family:var(--font-num);font-size:13px;color:var(--ink-3);flex:none}
.faq-t{flex:1}
.faq-arrow{width:16px;height:16px;flex:none;color:var(--ink-3);transition:transform .24s ease}
.faq-item.is-open .faq-arrow{transform:rotate(180deg);color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
.faq-a p{padding:0 22px 20px 57px;font-size:14.5px;color:var(--ink-2);line-height:1.9}

/* ---------- CTA ---------- */
.cta-band{padding:0 0 96px}
.cta-inner{
  position:relative;overflow:hidden;
  background:var(--dark);border-radius:20px;padding:52px 56px;
  display:flex;align-items:center;justify-content:space-between;gap:40px;
}
.cta-inner::before{
  content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,rgba(91,61,245,.4),rgba(91,61,245,0) 70%);
}
.cta-inner::after{
  content:"";position:absolute;inset:0;opacity:.06;
  background:repeating-linear-gradient(115deg,#fff 0 1px,transparent 1px 14px);
}
.cta-inner > *{position:relative;z-index:1}
.cta-inner h2{color:#fff;font-size:28px}
.cta-inner p{margin-top:12px;color:#B9B4C4;font-size:15.5px;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex:none}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:#B9B4C4;padding:72px 0 32px;font-size:14px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:44px}
.foot-brand .logo-text{color:#fff}
.foot-brand .logo-text i{color:#B9B4C4}
.foot-brand .logo:hover .logo-text i{color:#fff}
.foot-brand p{margin-top:18px;max-width:340px;line-height:1.9;color:#9C97A8}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:18px}
.foot-col li{margin-bottom:10px}
.foot-col a{color:#B9B4C4;position:relative}
.foot-col a::after{
  content:"";position:absolute;left:0;bottom:-2px;height:2px;width:100%;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .18s ease;
}
.foot-col a:hover{color:#fff}
.foot-col a:hover::after{transform:scaleX(1)}
.foot-col span{color:#9C97A8}
.foot-bottom{margin-top:52px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1)}
.foot-bottom .row{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;color:#8E899B;font-size:13px}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s cubic-bezier(.16,.84,.44,1),transform .4s cubic-bezier(.16,.84,.44,1)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  h1{font-size:42px}
  .hero-copy h1{font-size:46px}
  .sec-layout{grid-template-columns:236px minmax(0,1fr);gap:36px}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1023px){
  .nav-search{max-width:none}
  .nav-actions .nav-link{display:none}
  .nav-burger{display:inline-flex}
  .nav-bar{height:72px;gap:16px}
  .hotpanel{display:none}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-copy h1{font-size:40px}
  .page-hero{padding-bottom:72px}
  .float-card{position:static;width:100%;margin-top:16px;left:auto;bottom:auto}
  .sec-layout{grid-template-columns:1fr;gap:24px}
  .toc{position:static;padding:16px}
  .toc ol{flex-direction:row;overflow-x:auto;gap:8px;padding-bottom:4px}
  .toc-link{white-space:nowrap;border-left:0;border-bottom:2px solid transparent}
  .toc-link.is-active{border-left:0;border-bottom-color:var(--brand)}
  .toc-note{display:none}
  .checklist{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:40px 32px}
}
@media (max-width:767px){
  .container{width:min(1200px,100% - 32px)}
  .section{padding:64px 0}
  .section-tight{padding:52px 0}
  h2{font-size:24px}
  .nav-cats{justify-content:flex-start;overflow-x:auto;flex-wrap:nowrap}
  .hero-copy h1{font-size:34px}
  .sec-block{padding:24px 20px 26px}
  .block-num{font-size:34px}
  .scene-grid{grid-template-columns:1fr}
  .checklist-wrap{padding:26px 20px}
  .cta-band{padding-bottom:64px}
  .cta-inner{padding:32px 22px;border-radius:16px}
  .cta-actions .btn{width:100%}
  .foot-grid{grid-template-columns:1fr}
  .foot-bottom .row{flex-direction:column;gap:8px}
  .faq-a p{padding-left:22px}
}
@media (max-width:420px){
  h1{font-size:30px}
  .hero-copy h1{font-size:29px}
  .logo-text{font-size:16px}
  .btn{width:100%}
  .hero-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category2 */
:root{
  --brand:#5B3DF5;
  --brand-deep:#2B1B86;
  --accent:#FF6A3D;
  --ok:#12C9A0;
  --ink:#121016;
  --ink-2:#57515F;
  --ink-3:#9A94A6;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E8E4DD;
  --dark:#14121B;
  --r-lg:20px;
  --r:16px;
  --r-sm:12px;
  --r-btn:10px;
  --shadow:0 1px 2px rgba(18,16,22,.04),0 8px 24px rgba(18,16,22,.06);
  --shadow-hover:0 12px 32px rgba(91,61,245,.14);
  --font:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC",system-ui,"Microsoft YaHei",sans-serif;
  --mono:"Space Grotesk","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --gutter:24px;
  --sec:104px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .18s ease}
button,input{font:inherit;color:inherit;margin:0}
button{cursor:pointer;border:0;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.2;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
h1{font-size:clamp(32px,4.4vw,52px);line-height:1.14}
h2{font-size:clamp(24px,2.6vw,32px)}
h3{font-size:19px;line-height:1.4}
h4{font-size:16px;line-height:1.4}
p{margin:0}
strong{font-weight:700}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--gutter)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:0;
  border:1px solid transparent;background:var(--surface);color:var(--ink);
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .16s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.btn:active{transform:scale(.98)}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(91,61,245,.24)}
.btn-primary:hover{background:#4a2ee0}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 18px rgba(255,106,61,.24)}
.btn-accent:hover{background:#ef5a2c}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-ghost-dark{background:transparent;border-color:rgba(255,255,255,.26);color:#fff}
.btn-ghost-dark:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-block{width:100%}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,244,241,.86);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-bar{display:flex;align-items:center;gap:24px;height:80px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{width:38px;height:38px;flex:0 0 auto}
.logo-text{display:flex;align-items:baseline;font-size:17px;letter-spacing:-.01em}
.logo-text b{font-weight:800}
.logo-text i{font-style:normal;font-weight:500;color:var(--ink-2)}
.nav-search{position:relative;flex:1 1 auto;max-width:620px;margin:0 auto}
.nav-search form{
  display:flex;align-items:center;gap:8px;
  height:48px;padding:0 6px 0 16px;
  background:var(--surface);border:1px solid var(--line);border-radius:999px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search form:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(91,61,245,.18)}
.search-ico{width:19px;height:19px;color:var(--ink-3);flex:0 0 auto}
.nav-search input{
  flex:1 1 auto;min-width:0;height:100%;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--ink);
}
.nav-search input::placeholder{color:var(--ink-3)}
.nav-search input::-webkit-search-cancel-button{display:none}
.clear-btn{
  width:22px;height:22px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
  background:var(--line);color:var(--ink-2);flex:0 0 auto;
}
.clear-btn:hover{background:#dcd7cd}
.search-go{
  height:38px;padding:0 20px;border-radius:999px;background:var(--brand);color:#fff;
  font-size:14px;font-weight:600;flex:0 0 auto;transition:background .2s ease;
}
.search-go:hover{background:#4a2ee0}
.hotpanel{
  position:absolute;top:calc(100% + 10px);left:0;right:0;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--shadow);padding:18px 20px;
  display:grid;grid-template-columns:1fr 1fr;gap:6px 28px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .18s ease,transform .18s ease,visibility .18s;
}
.nav-search:focus-within .hotpanel{opacity:1;visibility:visible;transform:translateY(0)}
.hotpanel h4{font-size:12px;font-weight:700;color:var(--ink-3);letter-spacing:.08em;margin-bottom:6px}
.hotpanel ul li span{display:block;font-size:14px;color:var(--ink-2);padding:3px 0;cursor:default}
.hotpanel ul li span:hover{color:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.nav-link{font-size:14px;font-weight:600;color:var(--ink-2);position:relative;padding:4px 0}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .18s ease;
}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-burger{
  width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;
  display:none;align-items:center;justify-content:center;
}
.nav-burger svg{width:22px;height:22px}
.nav-cats-row{border-top:1px solid var(--line);background:rgba(255,255,255,.5)}
.nav-cats{display:flex;justify-content:center;align-items:center;gap:10px;padding:10px 0;flex-wrap:wrap}
.cat-pill{
  display:inline-flex;align-items:center;gap:6px;
  height:36px;padding:0 18px;border-radius:999px;
  background:#fff;border:1px solid var(--line);
  font-size:14px;font-weight:500;color:var(--ink-2);
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.cat-pill:hover{border-color:var(--brand);color:var(--brand)}
.cat-pill.is-active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}

/* 移动抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(18,16,22,.45);z-index:90;
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:95;
  background:#fff;border-radius:20px 0 0 20px;padding:26px 22px;
  transform:translateX(102%);transition:transform .28s cubic-bezier(.16,.84,.44,1);
  display:flex;flex-direction:column;gap:22px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center}
.drawer h4{font-size:12px;color:var(--ink-3);letter-spacing:.08em;margin-bottom:10px}
.drawer ul li a{display:block;padding:11px 2px;font-size:15px;font-weight:500;border-bottom:1px solid var(--line)}
.drawer ul li a:hover{color:var(--brand)}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px}

/* ---------- 首屏 ---------- */
.page-hero{position:relative;overflow:hidden;padding:96px 0 72px}
.page-hero::after{
  content:"";position:absolute;top:-60px;right:-140px;width:620px;height:520px;
  background:rgba(91,61,245,.09);
  clip-path:polygon(38% 0,100% 0,100% 100%,0 78%);z-index:0;pointer-events:none;
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:18px;flex-wrap:wrap}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span.sep{color:var(--line)}
.breadcrumb .cur{color:var(--ink-2)}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;border-radius:999px;
  background:rgba(91,61,245,.1);color:var(--brand-deep);font-size:13px;font-weight:600;margin-bottom:20px;
}
.hero-tag::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--brand)}
.page-hero h1{margin-bottom:20px}
.hero-sub{font-size:17px;color:var(--ink-2);max-width:560px;line-height:1.8}
.hero-cta{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.trust{display:flex;gap:22px;margin-top:32px;flex-wrap:wrap}
.trust li{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-2)}
.trust svg{width:16px;height:16px;color:var(--brand);flex:0 0 auto}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);
  border:1px solid var(--line);box-shadow:var(--shadow);
}
.float-card{
  position:absolute;left:-26px;bottom:-28px;width:min(280px,80%);
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  box-shadow:0 12px 32px rgba(18,16,22,.12);padding:16px 18px;
}
.float-card h4{font-size:12px;color:var(--ink-3);letter-spacing:.06em;margin-bottom:10px}
.float-row{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-2);padding:5px 0}
.float-row .val{font-family:var(--mono);font-variant-numeric:tabular-nums;color:var(--ink);font-weight:600}
.float-row .val.ok{color:var(--ok)}
.float-row .val.warn{color:var(--accent)}

/* ---------- 数据条 ---------- */
.stats-band{padding:0 0 var(--sec)}
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px 26px;box-shadow:var(--shadow);
}
.stat b{
  display:block;font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:38px;font-weight:700;line-height:1.05;color:var(--brand);letter-spacing:-.02em;
}
.stat span{display:block;margin-top:8px;font-size:13.5px;color:var(--ink-2)}

/* ---------- 板块通用 ---------- */
.section{padding:0 0 var(--sec)}
.sec-head{max-width:720px;margin-bottom:44px}
.sec-head h2{position:relative;padding-bottom:16px}
.sec-head h2::after{
  content:"";position:absolute;left:0;bottom:0;width:40px;height:4px;border-radius:2px;background:var(--accent);
}
.sec-head p{margin-top:16px;color:var(--ink-2);font-size:15.5px;line-height:1.85}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px}
.sec-head-row .sec-head{margin-bottom:0}
.more-link{font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.more-link svg{width:15px;height:15px;transition:transform .2s ease}
.more-link:hover svg{transform:translateX(4px)}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;padding-left:0}
.tl-item{
  position:relative;padding:0 0 52px 84px;
  display:grid;grid-template-columns:1fr 300px;gap:36px;align-items:start;
}
.tl-item::before{
  content:"";position:absolute;left:31px;top:36px;bottom:-18px;width:2px;
  background:linear-gradient(180deg,var(--line),rgba(232,228,221,.35));
}
.tl-item:last-child{padding-bottom:0}
.tl-item:last-child::before{display:none}
.tl-dot{
  position:absolute;left:24px;top:20px;width:16px;height:16px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 5px rgba(91,61,245,.12);
}
.tl-num{
  display:block;font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:64px;font-weight:700;line-height:.92;letter-spacing:-.04em;
  color:rgba(91,61,245,.16);margin-bottom:12px;
}
.tl-body h3{margin-bottom:12px}
.tl-body>p{color:var(--ink-2);font-size:15.5px;max-width:640px}
.tl-tips{margin-top:16px;display:flex;flex-direction:column;gap:9px}
.tl-tips li{
  display:flex;gap:10px;font-size:14px;color:var(--ink-2);
  background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);padding:11px 14px;
}
.tl-tips li svg{width:16px;height:16px;color:var(--ok);flex:0 0 auto;margin-top:4px}
.tl-fig{margin:0}
.tl-fig img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:14px;
  border:1px solid var(--line);background:var(--bg);
}

/* ---------- 场景卡 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:24px;box-shadow:var(--shadow);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  display:flex;flex-direction:column;gap:12px;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(91,61,245,.35)}
.card .badge{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:999px;
  background:rgba(91,61,245,.1);color:var(--brand-deep);font-size:12px;font-weight:600;align-self:flex-start;
}
.card h3{font-size:17px}
.card p{font-size:14px;color:var(--ink-2);line-height:1.8}
.card .arrow{margin-top:auto;display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:13.5px;font-weight:600}
.card .arrow svg{width:15px;height:15px;transition:transform .2s ease}
.card:hover .arrow svg{transform:translateX(4px)}

/* ---------- 提示对照表 ---------- */
.table-wrap{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  overflow-x:auto;box-shadow:var(--shadow);-webkit-overflow-scrolling:touch;
}
table{width:100%;border-collapse:collapse;min-width:680px}
thead th{
  text-align:left;font-size:13px;font-weight:700;color:var(--ink-3);letter-spacing:.04em;
  padding:18px 22px;border-bottom:1px solid var(--line);background:#FCFBF9;white-space:nowrap;
}
tbody td{padding:0 22px;height:56px;font-size:14.5px;color:var(--ink-2);border-bottom:1px solid var(--line);vertical-align:middle}
tbody tr:last-child td{border-bottom:0}
tbody td:first-child{color:var(--ink);font-weight:600;white-space:nowrap}
tbody tr:hover td{background:rgba(91,61,245,.035)}
.tag-mini{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:12px;font-weight:600;background:rgba(18,201,160,.12);color:#0b8f73}
.tag-mini.warn{background:rgba(255,106,61,.13);color:#c94b21}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);
  overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item.is-open{border-color:rgba(91,61,245,.4);box-shadow:var(--shadow);border-left:3px solid var(--brand)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;text-align:left;
  padding:20px 22px;font-size:15.5px;font-weight:600;color:var(--ink);
}
.faq-idx{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:14px;color:var(--ink-3);flex:0 0 auto}
.faq-text{flex:1 1 auto}
.faq-chev{width:18px;height:18px;color:var(--ink-3);flex:0 0 auto;transition:transform .24s ease}
.faq-item.is-open .faq-chev{transform:rotate(180deg);color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
.faq-a p{padding:0 22px 22px 60px;font-size:14.5px;line-height:1.9;color:var(--ink-2)}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--dark);border-radius:var(--r-lg);
  padding:52px 48px;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(560px 260px at 82% 20%,rgba(91,61,245,.38),transparent 70%);
  pointer-events:none;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(115deg,rgba(255,255,255,.045) 0 1px,transparent 1px 14px);
  pointer-events:none;
}
.cta-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:32px}
.cta-inner h2{color:#fff;margin-bottom:12px;font-size:clamp(22px,2.4vw,30px)}
.cta-inner p{color:#B9B4C4;font-size:15px;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#fff;margin-top:var(--sec);padding:72px 0 32px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:44px}
.foot-brand p{margin-top:18px;font-size:14px;line-height:1.85;color:#B9B4C4;max-width:340px}
.site-footer .logo-text b{color:#fff}
.site-footer .logo-text i{color:#B9B4C4}
.foot-col h4{font-size:13px;letter-spacing:.08em;color:#8C8699;margin-bottom:16px;font-weight:700}
.foot-col ul li{margin-bottom:10px}
.foot-col ul li a,.foot-col ul li span{font-size:14px;color:#B9B4C4}
.foot-col ul li a:hover{color:#fff;text-decoration:underline;text-decoration-color:var(--brand);text-decoration-thickness:2px;text-underline-offset:4px}
.foot-bottom{margin-top:56px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1)}
.foot-bottom .row{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.foot-bottom p{font-size:13px;color:#8C8699}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s cubic-bezier(.16,.84,.44,1),transform .4s cubic-bezier(.16,.84,.44,1)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  :root{--sec:88px}
  .hero-grid{gap:40px}
  .tl-item{grid-template-columns:1fr 250px;gap:28px}
}
@media (max-width:1023px){
  :root{--sec:76px}
  .nav-search{max-width:none}
  .nav-link{display:none}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .page-hero{padding:72px 0 56px}
  .hero-visual{max-width:560px}
  .float-card{left:auto;right:16px;bottom:-20px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .tl-item{grid-template-columns:1fr;gap:20px;padding-left:70px}
  .tl-fig{max-width:420px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:767px){
  :root{--sec:56px}
  body{font-size:15px}
  .nav-search{display:none}
  .nav-actions{gap:10px;margin-left:auto}
  .nav-burger{display:inline-flex}
  .nav-bar{height:66px;gap:12px}
  .nav-cats-row{display:none}
  .page-hero{padding:56px 0 48px}
  .hero-sub{font-size:15.5px}
  .hero-cta .btn{flex:1 1 auto}
  .trust{gap:14px}
  .float-card{position:static;width:100%;margin-top:14px}
  .stats-grid{padding:22px 18px}
  .stat b{font-size:30px}
  .card-grid{grid-template-columns:1fr}
  .tl-item{padding-left:56px}
  .tl-item::before{left:19px;top:32px}
  .tl-dot{left:12px;top:16px;width:14px;height:14px}
  .tl-num{font-size:46px}
  .sec-head-row{flex-direction:column;align-items:flex-start;gap:14px}
  .faq-a p{padding-left:22px}
  .cta-band{padding:36px 24px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .foot-grid{grid-template-columns:1fr;gap:32px}
  .foot-bottom .row{flex-direction:column}
}
@media (max-width:420px){
  :root{--gutter:18px}
  h1{font-size:30px}
  .hero-cta{flex-direction:column}
  .hero-cta .btn{width:100%}
  .stats-grid{grid-template-columns:1fr 1fr}
}

/* roulang page: category3 */
/* ============ 设计变量 ============ */
:root{
  --brand:#5B3DF5;
  --brand-deep:#2B1B86;
  --accent:#FF6A3D;
  --ok:#12C9A0;
  --ink:#121016;
  --ink-2:#57515F;
  --ink-3:#9A94A6;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E8E4DD;
  --dark:#14121B;
  --r-xl:20px;
  --r-md:16px;
  --r-sm:12px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(18,16,22,.04), 0 8px 24px rgba(18,16,22,.06);
  --sh-2:0 12px 32px rgba(91,61,245,.14);
  --font:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC",system-ui,"Microsoft YaHei",sans-serif;
  --mono:"Space Grotesk","IBM Plex Mono",ui-monospace,SFMono-Regular,monospace;
}

/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-deep)}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font-family:inherit;font-size:15px;color:var(--ink)}
h1,h2,h3,h4{margin:0;line-height:1.22;font-weight:800;letter-spacing:-.02em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:0}

/* ============ 容器 ============ */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.narrow{max-width:760px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:background-color .18s ease,color .18s ease,box-shadow .18s ease,transform .12s ease,border-color .18s ease;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(91,61,245,.24)}
.btn-primary:hover{background:#4B2FE0;color:#fff;box-shadow:var(--sh-2);transform:translateY(-2px)}
.btn-primary:active{transform:scale(.98)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(255,106,61,.26)}
.btn-accent:hover{background:#F05526;color:#fff;transform:translateY(-2px)}
.btn-accent:active{transform:scale(.98)}
.btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-ghost:active{transform:scale(.98)}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}

/* ============ 头部 / 搜索主导导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,241,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-bar{display:flex;align-items:center;gap:24px;height:80px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);flex:none}
.logo:hover{color:var(--ink)}
.logo-mark{width:38px;height:38px;flex:none}
.logo-text{font-size:18px;letter-spacing:-.01em;white-space:nowrap}
.logo-text b{font-weight:800}
.logo-text i{font-style:normal;font-weight:500;color:var(--ink-2)}

.nav-search{position:relative;flex:1 1 auto;max-width:640px}
.nav-search form{
  display:flex;align-items:center;gap:8px;
  height:48px;padding:0 6px 0 16px;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.nav-search form:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(91,61,245,.18)}
.search-ico{width:18px;height:18px;color:var(--ink-3);flex:none}
.nav-search input{
  flex:1 1 auto;min-width:0;height:100%;border:0;background:transparent;outline:none;font-size:15px;
}
.nav-search input::placeholder{color:var(--ink-3)}
.clear-btn{
  width:24px;height:24px;border-radius:50%;display:grid;place-items:center;
  color:var(--ink-3);background:var(--bg);flex:none;transition:background .18s ease,color .18s ease;
}
.clear-btn:hover{background:var(--line);color:var(--ink)}
.search-go{
  height:36px;padding:0 18px;border-radius:999px;background:var(--brand);color:#fff;
  font-size:14px;font-weight:600;flex:none;transition:background .18s ease,transform .12s ease;
}
.search-go:hover{background:#4B2FE0}
.search-go:active{transform:scale(.98)}
.hotpanel{
  position:absolute;left:0;right:0;top:calc(100% + 10px);
  display:none;grid-template-columns:1fr 1fr;gap:8px 20px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:18px 20px;box-shadow:var(--sh-1);
}
.nav-search:focus-within .hotpanel,.nav-search:hover .hotpanel{display:grid}
.hotpanel h4{font-size:12px;color:var(--ink-3);font-weight:600;letter-spacing:.06em;margin-bottom:6px}
.hotpanel ul li{font-size:14px;color:var(--ink-2);line-height:2.1}
.hotpanel ul li span{cursor:default}

.nav-actions{display:flex;align-items:center;gap:16px;flex:none;margin-left:auto}
.nav-link{font-size:15px;color:var(--ink-2);font-weight:500}
.nav-link:hover{color:var(--brand)}
.nav-burger{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:#fff;place-items:center;
}
.nav-burger:hover{border-color:var(--brand)}

.nav-cats{
  display:flex;align-items:center;justify-content:center;gap:10px;
  padding-bottom:16px;flex-wrap:wrap;
}
.cat-pill{
  display:inline-flex;align-items:center;height:36px;padding:0 18px;
  border-radius:999px;background:#fff;border:1px solid var(--line);
  font-size:14px;font-weight:500;color:var(--ink-2);
  transition:border-color .18s ease,color .18s ease,background .18s ease,transform .12s ease;
}
.cat-pill:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.cat-pill.is-active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.cat-pill.is-active:hover{color:#fff}

/* 移动抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(18,16,22,.45);z-index:80;
  opacity:0;pointer-events:none;transition:opacity .24s ease;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:300px;max-width:86vw;z-index:90;
  background:#fff;border-radius:20px 0 0 20px;padding:24px;
  transform:translateX(100%);transition:transform .26s cubic-bezier(.16,.84,.44,1);
  display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer-head span{font-size:12px;letter-spacing:.08em;color:var(--ink-3);font-weight:600}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);display:grid;place-items:center}
.drawer a.d-item{
  display:block;padding:13px 14px;border-radius:var(--r-sm);
  color:var(--ink);font-size:15px;font-weight:500;
}
.drawer a.d-item:hover{background:var(--bg);color:var(--brand)}
.drawer a.d-item.is-active{background:rgba(91,61,245,.08);color:var(--brand);font-weight:700}
.drawer .drawer-cta{margin-top:16px}

/* ============ Hero ============ */
.cat-hero{position:relative;overflow:hidden;padding:104px 0 88px}
.cat-hero::after{
  content:"";position:absolute;right:-160px;top:-80px;width:620px;height:620px;
  background:linear-gradient(135deg,rgba(91,61,245,.14),rgba(255,106,61,.10));
  transform:rotate(18deg);border-radius:120px;pointer-events:none;
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:32px;padding:0 14px;
  border-radius:999px;background:rgba(91,61,245,.08);color:var(--brand);
  font-size:13px;font-weight:600;margin-bottom:20px;
}
.eyebrow svg{width:14px;height:14px}
.cat-hero h1{font-size:60px;line-height:1.08;letter-spacing:-.03em;margin-bottom:20px}
.cat-hero h1 em{font-style:normal;color:var(--brand)}
.hero-sub{font-size:17px;color:var(--ink-2);max-width:540px;margin-bottom:28px;line-height:1.8}
.hero-search{
  display:flex;align-items:center;gap:10px;height:56px;max-width:520px;padding:0 8px 0 18px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);
  box-shadow:var(--sh-1);transition:border-color .18s ease,box-shadow .18s ease;
}
.hero-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(91,61,245,.18)}
.hero-search svg{width:18px;height:18px;color:var(--ink-3);flex:none}
.hero-search input{flex:1 1 auto;min-width:0;border:0;background:transparent;outline:none;height:100%}
.hero-search input::placeholder{color:var(--ink-3)}
.hero-search button{
  height:42px;padding:0 20px;border-radius:8px;background:var(--brand);color:#fff;
  font-size:14px;font-weight:600;flex:none;transition:background .18s ease;
}
.hero-search button:hover{background:#4B2FE0}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}
.hero-tags{display:flex;gap:20px;flex-wrap:wrap;margin-top:26px}
.hero-tags span{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--ink-2)}
.hero-tags svg{width:15px;height:15px;color:var(--ok)}
.hero-media{position:relative}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-xl);box-shadow:var(--sh-1)}
.float-card{
  position:absolute;left:-18px;bottom:26px;width:250px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:16px 18px;box-shadow:0 8px 28px rgba(18,16,22,.12);
}
.float-card h4{font-size:12px;color:var(--ink-3);letter-spacing:.06em;font-weight:600;margin-bottom:10px}
.float-row{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-2);padding:5px 0;border-bottom:1px dashed var(--line)}
.float-row:last-child{border-bottom:0}
.float-row b{font-family:var(--mono);font-size:14px;color:var(--ink)}
.float-row b.ok{color:var(--ok)}

/* ============ 通用板块 ============ */
.section{padding:96px 0}
.section-tight{padding:72px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.sec-head h2{font-size:34px;letter-spacing:-.02em}
.sec-bar{width:40px;height:4px;border-radius:2px;background:var(--accent);margin-bottom:16px}
.sec-desc{font-size:15px;color:var(--ink-2);max-width:620px;margin-top:12px}
.sec-link{font-size:14px;font-weight:600;white-space:nowrap}

/* ============ 速览卡 ============ */
.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.quick-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:24px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.quick-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(91,61,245,.28)}
.quick-card .qc-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.quick-card .qc-ico{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:rgba(91,61,245,.08);color:var(--brand);
}
.quick-card .qc-ico svg{width:20px;height:20px}
.quick-card .qc-count{font-family:var(--mono);font-size:22px;font-weight:700;color:var(--ink)}
.quick-card h3{font-size:16px;margin-bottom:8px}
.quick-card p{font-size:14px;color:var(--ink-2);line-height:1.8}

/* ============ 问答区 ============ */
.qa-section{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.qa-toolbar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px}
.pill{
  height:36px;padding:0 16px;border-radius:999px;border:1px solid var(--line);
  background:var(--bg);font-size:14px;color:var(--ink-2);font-weight:500;
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.pill:hover{border-color:var(--brand);color:var(--brand)}
.pill.is-active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.pill.is-active:hover{color:#fff}
.qa-group{margin-bottom:36px}
.qa-group.hide{display:none}
.qa-group-title{
  display:flex;align-items:center;gap:12px;font-size:15px;font-weight:700;color:var(--ink);
  margin-bottom:12px;padding-left:2px;
}
.qa-group-title::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}
.qa-group-title .cnt{font-family:var(--mono);font-weight:400;font-size:13px;color:var(--ink-3)}
.qa-list{counter-reset:qa;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line)}
.qa-list + .qa-list{margin-top:0}
.qa-item{
  counter-increment:qa;background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.qa-item:last-child{border-bottom:0}
.qa-item.hide{display:none}
.qa-item.is-open{box-shadow:inset 3px 0 0 var(--brand)}
.qa-q{
  display:flex;align-items:center;gap:16px;width:100%;text-align:left;
  padding:16px 20px;background:#fff;transition:background .18s ease;
}
.qa-q:hover{background:#FBFAF8}
.qa-num{
  font-family:var(--mono);font-size:14px;color:var(--ink-3);flex:none;width:28px;
}
.qa-num::before{content:counter(qa,decimal-leading-zero)}
.qa-item.is-open .qa-num{color:var(--brand)}
.qa-text{flex:1 1 auto;font-size:15px;font-weight:600;line-height:1.6;color:var(--ink)}
.qa-chev{
  width:26px;height:26px;flex:none;border-radius:50%;display:grid;place-items:center;
  background:var(--bg);color:var(--ink-3);transition:transform .24s ease,background .18s ease,color .18s ease;
}
.qa-chev svg{width:13px;height:13px}
.qa-item.is-open .qa-chev{transform:rotate(180deg);background:rgba(91,61,245,.1);color:var(--brand)}
.qa-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
.qa-a-inner{padding:0 20px 22px 64px;font-size:14.5px;color:var(--ink-2);line-height:1.9}
.qa-a-inner p + p{margin-top:10px}
.qa-a-inner .tip{
  display:block;margin-top:12px;padding:12px 14px;border-left:4px solid var(--accent);
  background:#FFF6F1;border-radius:0 10px 10px 0;font-size:14px;color:var(--ink-2);
}
.qa-empty{
  min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;text-align:center;border:1px dashed var(--line);border-radius:var(--r-md);background:var(--bg);
}
.qa-empty svg{width:52px;height:52px;color:var(--ink-3)}
.qa-empty p{font-size:14px;color:var(--ink-2)}

/* ============ 排查步骤时间线 ============ */
.steps{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.steps::before{
  content:"";position:absolute;left:0;right:0;top:19px;height:2px;background:var(--line);
}
.step{position:relative;padding-top:56px}
.step-dot{
  position:absolute;top:10px;left:0;width:20px;height:20px;border-radius:50%;
  background:var(--brand);border:4px solid var(--bg);box-shadow:0 0 0 2px rgba(91,61,245,.25);
}
.step .s-idx{font-family:var(--mono);font-size:13px;color:var(--ink-3);display:block;margin-bottom:8px}
.step h3{font-size:17px;margin-bottom:10px}
.step p{font-size:14px;color:var(--ink-2)}

/* ============ 人工介入 ============ */
.assist-grid{display:grid;grid-template-columns:5fr 7fr;gap:44px;align-items:center}
.assist-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-md);box-shadow:var(--sh-1)}
.notice-list{display:flex;flex-direction:column;gap:14px;margin-top:24px}
.notice{
  display:flex;gap:14px;padding:18px 20px;background:var(--surface);
  border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:0 var(--r-sm) var(--r-sm) 0;
  transition:transform .2s ease,box-shadow .2s ease;
}
.notice:hover{transform:translateX(2px);box-shadow:var(--sh-1)}
.notice .n-ico{width:22px;height:22px;color:var(--accent);flex:none;margin-top:3px}
.notice h4{font-size:15px;margin-bottom:4px}
.notice p{font-size:14px;color:var(--ink-2)}

/* ============ 相关主题 ============ */
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.topic-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.topic-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(91,61,245,.28)}
.topic-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.topic-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1 1 auto}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:rgba(91,61,245,.08);color:var(--brand);font-size:12px;font-weight:600;
  align-self:flex-start;margin-bottom:12px;
}
.topic-body h3{font-size:17px;margin-bottom:10px;line-height:1.4}
.topic-body p{font-size:14px;color:var(--ink-2);flex:1 1 auto;margin-bottom:16px}
.topic-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600}
.topic-more svg{width:14px;height:14px;transition:transform .2s ease}
.topic-card:hover .topic-more svg{transform:translateX(4px)}

/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;background:var(--dark);border-radius:var(--r-xl);
  padding:48px;display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;
}
.cta-band::before{
  content:"";position:absolute;left:-60px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(91,61,245,.38),transparent 68%);
}
.cta-band::after{
  content:"";position:absolute;right:0;bottom:0;width:280px;height:280px;
  background:repeating-linear-gradient(135deg,rgba(255,255,255,.05) 0 2px,transparent 2px 12px);
}
.cta-copy{position:relative;z-index:1}
.cta-copy h2{color:#fff;font-size:30px;margin-bottom:12px}
.cta-copy p{color:#B9B4C4;font-size:15px;max-width:560px}
.cta-actions{position:relative;z-index:1;display:flex;gap:12px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{background:var(--dark);color:#B9B4C4;padding:72px 0 32px;margin-top:96px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.1)}
.foot-brand .logo{color:#fff;margin-bottom:16px}
.foot-brand .logo-text i{color:#B9B4C4}
.foot-brand p{font-size:14px;line-height:1.9;color:#B9B4C4;max-width:320px}
.foot-col h4{font-size:14px;color:#fff;margin-bottom:16px;font-weight:700}
.foot-col ul li{margin-bottom:10px}
.foot-col ul li a,.foot-col ul li span{font-size:14px;color:#B9B4C4}
.foot-col ul li a{position:relative;padding-bottom:2px}
.foot-col ul li a::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--brand);
  transition:width .18s ease;
}
.foot-col ul li a:hover{color:#fff}
.foot-col ul li a:hover::after{width:100%}
.foot-bottom{padding-top:24px}
.foot-bottom .row{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.foot-bottom p{font-size:13px;color:#8A8496}

/* ============ 动效 ============ */
.fade-up{opacity:0;transform:translateY(12px);transition:opacity .4s cubic-bezier(.16,.84,.44,1),transform .4s cubic-bezier(.16,.84,.44,1)}
.fade-up.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .fade-up{opacity:1;transform:none}
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .cat-hero h1{font-size:50px}
  .sec-head h2{font-size:30px}
  .hero-grid{gap:36px}
}
@media (max-width:1023px){
  .nav-bar{gap:16px}
  .nav-search{max-width:420px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .cat-hero{padding:80px 0 64px}
  .cat-hero h1{font-size:44px}
  .hero-media img{aspect-ratio:16/9}
  .quick-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr);gap:32px 24px}
  .steps::before{display:none}
  .step-dot{left:0}
  .assist-grid{grid-template-columns:1fr;gap:32px}
  .topic-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{grid-template-columns:1fr;padding:40px 32px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .nav-bar{height:auto;flex-wrap:wrap;padding:12px 0 8px;gap:12px}
  .logo-text{font-size:16px}
  .nav-burger{display:grid;margin-left:auto}
  .nav-actions .nav-link,.nav-actions .btn{display:none}
  .nav-search{order:3;flex:1 1 100%;max-width:none}
  .nav-search form{height:44px}
  .hotpanel{display:none!important}
  .nav-cats{justify-content:flex-start;overflow-x:auto;flex-wrap:nowrap;padding-bottom:12px;scrollbar-width:none}
  .nav-cats::-webkit-scrollbar{display:none}
  .cat-pill{flex:none}
  .cat-hero{padding:56px 0 48px}
  .cat-hero h1{font-size:36px}
  .hero-sub{font-size:15px}
  .hero-search{height:52px;max-width:none}
  .float-card{position:static;width:100%;margin-top:14px;left:auto;bottom:auto}
  .section{padding:64px 0}
  .section-tight{padding:52px 0}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px}
  .sec-head h2{font-size:26px}
  .quick-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .topic-grid{grid-template-columns:1fr}
  .qa-a-inner{padding:0 18px 20px 18px}
  .qa-q{padding:15px 16px;gap:12px}
  .qa-text{font-size:14.5px}
  .cta-band{padding:32px 24px;border-radius:var(--r-md)}
  .cta-copy h2{font-size:24px}
  .cta-actions{flex-direction:column;align-items:stretch}
  .site-footer{padding:56px 0 28px;margin-top:64px}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-bottom .row{flex-direction:column;gap:8px}
}
@media (max-width:420px){
  .cat-hero h1{font-size:30px}
  .sec-head h2{font-size:23px}
  .btn{width:100%}
  .btn-sm{width:auto}
  .hero-cta{flex-direction:column;align-items:stretch}
}

/* roulang page: category4 */
:root{
  --brand:#5B3DF5;
  --brand-deep:#2B1B86;
  --accent:#FF6A3D;
  --ok:#12C9A0;
  --ink:#121016;
  --ink-2:#57515F;
  --ink-3:#9A94A6;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E8E4DD;
  --dark:#14121B;
  --radius:16px;
  --radius-sm:12px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow:0 1px 2px rgba(18,16,22,.04), 0 8px 24px rgba(18,16,22,.06);
  --shadow-hover:0 12px 32px rgba(91,61,245,.14);
  --font:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC",system-ui,"Microsoft YaHei",sans-serif;
  --mono:"Space Grotesk","IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.22;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
table{border-collapse:collapse}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,244,241,.88);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-bar{display:flex;align-items:center;gap:26px;height:76px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{width:38px;height:38px;flex:0 0 auto}
.logo-text{font-size:19px;line-height:1;letter-spacing:-.02em;display:inline-flex;align-items:baseline;gap:2px}
.logo-text b{font-weight:800;color:var(--ink)}
.logo-text i{font-style:normal;font-weight:500;color:var(--ink-2)}
.nav-search{position:relative;flex:1 1 auto;max-width:620px}
.nav-search form{
  display:flex;align-items:center;gap:8px;
  height:48px;padding:0 6px 0 16px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-pill);
  transition:border-color .18s,box-shadow .18s;
}
.nav-search form:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(91,61,245,.18)}
.search-ico{width:18px;height:18px;color:var(--ink-3);flex:0 0 auto}
.nav-search input{flex:1 1 auto;min-width:0;height:44px;border:0;background:transparent;outline:none;font-size:14.5px}
.nav-search input::placeholder{color:var(--ink-3)}
.clear-btn{
  flex:0 0 auto;width:22px;height:22px;border:0;border-radius:50%;
  background:var(--line);color:var(--ink-2);cursor:pointer;
  display:flex;align-items:center;justify-content:center;transition:background .18s,color .18s;
}
.clear-btn:hover{background:#DCD7CF;color:var(--ink)}
.search-go{
  flex:0 0 auto;height:38px;padding:0 20px;border:0;border-radius:var(--radius-pill);
  background:var(--brand);color:#fff;font-weight:700;font-size:14px;cursor:pointer;
  transition:background .18s,transform .12s;
}
.search-go:hover{background:#4A2EE0}
.search-go:active{transform:scale(.98)}
.hotpanel{
  display:none;position:absolute;top:calc(100% + 10px);left:0;right:0;
  grid-template-columns:1fr 1fr;gap:4px 26px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:18px 22px;z-index:70;
}
.nav-search:focus-within .hotpanel{display:grid}
.hotpanel h4{grid-column:span 1;font-size:13px;font-weight:700;color:var(--ink-3);letter-spacing:.02em;margin-bottom:6px}
.hotpanel ul li{font-size:14px;color:var(--ink-2);line-height:2.1;cursor:default;transition:color .18s}
.hotpanel ul li:hover{color:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:14px;margin-left:auto;flex:0 0 auto}
.nav-link{font-size:14.5px;font-weight:600;color:var(--ink-2);transition:color .18s}
.nav-link:hover{color:var(--brand)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:700;cursor:pointer;
  transition:background .18s,color .18s,border-color .18s,transform .12s,box-shadow .2s;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:#4A2EE0;box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#EB5729;box-shadow:0 12px 32px rgba(255,106,61,.24);transform:translateY(-2px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}
.nav-burger{
  display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:var(--surface);align-items:center;justify-content:center;cursor:pointer;
}
.nav-burger svg{width:20px;height:20px}
.cat-strip{border-top:1px solid var(--line)}
.cat-pills{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;padding:12px 0}
.cat-pills a{
  display:inline-flex;align-items:center;height:36px;padding:0 18px;border-radius:var(--radius-pill);
  background:var(--surface);border:1px solid var(--line);color:var(--ink-2);
  font-size:14px;font-weight:600;transition:border-color .18s,color .18s,background .18s;
}
.cat-pills a:hover{border-color:var(--brand);color:var(--brand)}
.cat-pills a.is-active{background:var(--brand);border-color:var(--brand);color:#fff}

/* ---------- Drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(18,16,22,.45);opacity:0;visibility:hidden;
  transition:opacity .24s;z-index:90;
}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);background:var(--surface);
  border-radius:20px 0 0 20px;padding:26px 22px;z-index:95;
  transform:translateX(102%);transition:transform .28s cubic-bezier(.16,.84,.44,1);
  overflow-y:auto;
}
body.drawer-open .drawer{transform:translateX(0)}
body.drawer-open .drawer-mask{opacity:1;visibility:visible}
.drawer h4{font-size:13px;color:var(--ink-3);margin:22px 0 10px;letter-spacing:.04em}
.drawer ul li a{display:block;padding:11px 0;font-size:15px;font-weight:600;color:var(--ink-2);border-bottom:1px solid var(--line)}
.drawer ul li a:hover{color:var(--brand)}
.drawer .btn{width:100%;margin-top:20px}
.drawer-close{width:36px;height:36px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:104px 0 96px}
.hero::before{
  content:"";position:absolute;right:-120px;top:-60px;width:560px;height:520px;
  background:linear-gradient(150deg,rgba(91,61,245,.14),rgba(91,61,245,0) 68%);
  clip-path:polygon(18% 0,100% 0,100% 100%,0 78%);
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:20px}
.crumbs a{color:var(--ink-2)}
.crumbs a:hover{color:var(--brand)}
.crumbs span.sep{color:var(--line)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;margin-bottom:18px;
  border-radius:var(--radius-pill);background:rgba(91,61,245,.1);color:var(--brand);
  font-size:13px;font-weight:700;letter-spacing:.02em;
}
.hero h1{font-size:clamp(30px,4.2vw,50px);line-height:1.16;letter-spacing:-.02em}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero .lead{margin-top:20px;font-size:17px;color:var(--ink-2);max-width:560px;line-height:1.85}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.trust{display:flex;flex-wrap:wrap;gap:12px 22px;margin-top:30px}
.trust li{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-2)}
.trust svg{width:16px;height:16px;color:var(--ok);flex:0 0 auto}
.hero-visual{position:relative}
.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:20px;border:1px solid var(--line);background:var(--bg)}
.float-card{
  position:absolute;left:-18px;bottom:-22px;min-width:238px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);
  box-shadow:var(--shadow);padding:16px 18px;
}
.float-card .fc-top{display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--ink-3);margin-bottom:10px}
.float-card .fc-top b{color:var(--ok);font-weight:700}
.float-card .fc-row{display:flex;align-items:baseline;justify-content:space-between;font-size:14px;padding:5px 0}
.float-card .fc-row span{color:var(--ink-2)}
.float-card .fc-row strong{font-family:var(--mono);font-variant-numeric:tabular-nums;color:var(--ink);font-size:15px}

/* ---------- Sections ---------- */
.section{padding:96px 0}
.section.tight{padding:76px 0}
.section-head{max-width:720px;margin-bottom:44px}
.section-head h2{font-size:clamp(24px,2.8vw,34px);position:relative;padding-top:20px}
.section-head h2::before{content:"";position:absolute;top:0;left:0;width:40px;height:4px;border-radius:2px;background:var(--brand)}
.section-head p{margin-top:14px;color:var(--ink-2);font-size:16px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head.center h2::before{left:50%;transform:translateX(-50%)}

/* ---------- Tier cards ---------- */
.tier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tier-card{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow);transition:transform .22s,box-shadow .22s,border-color .22s;
  display:flex;flex-direction:column;
}
.tier-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.tier-card.is-hi{border:2px solid var(--accent);background:linear-gradient(180deg,rgba(255,106,61,.05),rgba(255,255,255,0) 42%)}
.tier-card .tier-tag{
  position:absolute;top:-13px;left:26px;height:26px;padding:0 12px;border-radius:var(--radius-pill);
  background:var(--accent);color:#fff;font-size:12px;font-weight:700;display:inline-flex;align-items:center;
}
.tier-card h3{font-size:19px;margin-bottom:6px}
.tier-card .price{display:flex;align-items:baseline;gap:6px;margin:14px 0 4px}
.tier-card .price strong{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:34px;font-weight:700;letter-spacing:-.02em}
.tier-card .price span{font-size:13px;color:var(--ink-3)}
.tier-card .tier-note{font-size:13.5px;color:var(--ink-3);margin-bottom:18px}
.tier-card ul{display:flex;flex-direction:column;gap:11px;margin-bottom:24px}
.tier-card ul li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2);line-height:1.7}
.tier-card ul li svg{width:16px;height:16px;flex:0 0 auto;margin-top:6px;color:var(--ok)}
.tier-card .btn{margin-top:auto;width:100%}

/* ---------- Compare table ---------- */
.table-note{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-top:14px}
.cmp-wrap{margin-top:8px}
.cmp-table{
  width:100%;min-width:760px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
}
.cmp-table th,.cmp-table td{padding:0 20px;height:56px;font-size:14.5px;text-align:center;border-bottom:1px solid var(--line);vertical-align:middle}
.cmp-table thead th{height:104px;background:var(--bg);font-weight:700}
.cmp-table thead th:first-child{text-align:left;font-size:13.5px;color:var(--ink-3);font-weight:600;width:26%}
.cmp-table tbody tr:last-child th,.cmp-table tbody tr:last-child td{border-bottom:0}
.cmp-table tbody th{text-align:left;font-weight:600;color:var(--ink-2);font-size:14.5px}
.cmp-table .col-hi{background:#FFF4EF}
.cmp-table thead th.col-hi{border-top:2px solid var(--accent)}
.th-name{display:block;font-size:16px;font-weight:800;color:var(--ink);margin-bottom:6px}
.th-price{display:block;font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:22px;font-weight:700;color:var(--ink);letter-spacing:-.02em}
.th-price em{font-style:normal;font-size:12.5px;font-weight:500;color:var(--ink-3);margin-left:3px}
.th-btn{margin-top:10px;display:inline-flex;align-items:center;justify-content:center;height:32px;padding:0 16px;border-radius:8px;font-size:13px;font-weight:700;background:var(--surface);border:1px solid var(--line);color:var(--ink-2);transition:all .18s}
.th-btn:hover{border-color:var(--brand);color:var(--brand)}
.th-btn.solid{background:var(--brand);border-color:var(--brand);color:#fff}
.th-btn.solid:hover{background:#4A2EE0;color:#fff}
.th-btn.hi{background:var(--accent);border-color:var(--accent);color:#fff}
.th-btn.hi:hover{background:#EB5729;color:#fff}
.yes{display:inline-flex;color:var(--ok)}
.yes svg{width:19px;height:19px}
.no{display:inline-block;width:14px;height:2px;border-radius:2px;background:var(--ink-3);vertical-align:middle}
.scroll-hint{display:none;font-size:13px;color:var(--ink-3);margin-top:10px}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.step{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;transition:transform .22s,box-shadow .22s}
.step:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.step .no{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:30px;font-weight:700;color:rgba(91,61,245,.28);letter-spacing:-.03em;display:block;margin-bottom:12px}
.step h3{font-size:16.5px;margin-bottom:10px}
.step p{font-size:14.5px;color:var(--ink-2);line-height:1.8}
.scene-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:36px}
.scene-tags li{
  display:inline-flex;align-items:center;height:38px;padding:0 16px;border-radius:var(--radius-pill);
  background:var(--surface);border:1px solid var(--line);font-size:14px;color:var(--ink-2);font-weight:600;
  transition:border-color .18s,color .18s,transform .18s;
}
.scene-tags li:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}

/* ---------- Content preview ---------- */
.preview-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.pv-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .22s,box-shadow .22s;
}
.pv-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.pv-card .thumb{position:relative;overflow:hidden}
.pv-card .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s}
.pv-card:hover .thumb img{transform:scale(1.03)}
.pv-lock{
  position:absolute;top:12px;right:12px;width:30px;height:30px;border-radius:9px;
  background:rgba(20,18,27,.78);display:flex;align-items:center;justify-content:center;color:#fff;
}
.pv-lock svg{width:15px;height:15px}
.pv-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 11px;border-radius:var(--radius-pill);
  font-size:12.5px;font-weight:700;background:rgba(91,61,245,.1);color:var(--brand);margin-bottom:12px;
}
.pv-body h3{font-size:17px;line-height:1.45;margin-bottom:8px}
.pv-body p{font-size:14.5px;color:var(--ink-2);line-height:1.8}
.pv-link{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:14px;font-weight:700;color:var(--brand)}
.pv-link svg{width:15px;height:15px;transition:transform .2s}
.pv-card:hover .pv-link svg{transform:translateX(4px)}

/* ---------- FAQ ---------- */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:12px;overflow:hidden;transition:border-color .2s}
.faq-item[open]{border-left:3px solid var(--brand)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:16px;
  padding:18px 22px;font-size:16px;font-weight:700;line-height:1.5;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item .idx{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:14px;color:var(--ink-3);flex:0 0 auto}
.faq-item .chev{margin-left:auto;flex:0 0 auto;color:var(--ink-3);transition:transform .24s}
.faq-item .chev svg{width:16px;height:16px;display:block}
.faq-item[open] .chev{transform:rotate(180deg);color:var(--brand)}
.faq-item .ans{padding:0 22px 20px 56px;color:var(--ink-2);font-size:15px;line-height:1.9}

/* ---------- CTA ---------- */
.cta-band{padding:0 0 96px}
.cta-inner{
  position:relative;overflow:hidden;background:var(--dark);border-radius:20px;
  padding:52px 56px;display:flex;align-items:center;justify-content:space-between;gap:36px;
}
.cta-inner::before{
  content:"";position:absolute;right:-80px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(91,61,245,.42),rgba(91,61,245,0) 68%);pointer-events:none;
}
.cta-inner::after{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(115deg,rgba(255,255,255,.05) 0 1px,transparent 1px 14px);
  pointer-events:none;
}
.cta-copy{position:relative;z-index:1;max-width:600px}
.cta-copy h2{color:#fff;font-size:clamp(22px,2.6vw,30px)}
.cta-copy p{color:#B9B4C4;margin-top:12px;font-size:15.5px;line-height:1.8}
.cta-actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:14px;flex:0 0 auto}

/* ---------- Footer ---------- */
.site-footer{background:var(--dark);color:#B9B4C4;padding:72px 0 28px;font-size:14.5px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.site-footer .logo-text b{color:#fff}
.site-footer .logo-text i{color:#B9B4C4}
.foot-brand p{margin-top:18px;line-height:1.9;max-width:340px;font-size:14px}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:700}
.foot-col ul li{margin-bottom:10px;line-height:1.7}
.foot-col ul li a{transition:color .18s,border-color .18s;border-bottom:2px solid transparent;padding-bottom:2px}
.foot-col ul li a:hover{color:#fff;border-color:var(--brand)}
.foot-bottom{margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12)}
.foot-bottom .row{display:flex;flex-wrap:wrap;gap:10px 28px;justify-content:space-between;font-size:13px;color:#8B8598}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s cubic-bezier(.16,.84,.44,1),transform .4s cubic-bezier(.16,.84,.44,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  .hero-grid{gap:40px}
  .hero h1{font-size:clamp(28px,3.6vw,42px)}
  .tier-card{padding:24px}
  .steps{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1023px){
  .section{padding:76px 0}
  .hero{padding:76px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero-visual img{aspect-ratio:16/9}
  .float-card{position:static;margin-top:-34px;margin-left:20px;display:inline-block}
  .tier-grid{grid-template-columns:1fr 1fr}
  .preview-grid{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:34px}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:44px 40px}
}
@media (max-width:767px){
  .nav-bar{flex-wrap:wrap;height:auto;padding:12px 0;gap:12px 14px}
  .nav-search{order:3;flex-basis:100%;max-width:none}
  .hotpanel{grid-template-columns:1fr}
  .nav-actions .nav-link,.nav-actions .btn{display:none}
  .nav-burger{display:flex;margin-left:auto}
  .cat-strip{display:none}
  .section{padding:56px 0}
  .section.tight{padding:48px 0}
  .hero{padding:52px 0 56px}
  .hero .lead{font-size:16px}
  .hero-cta .btn{flex:1 1 100%}
  .tier-grid{grid-template-columns:1fr}
  .preview-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .cmp-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;padding-bottom:6px}
  .cmp-table{min-width:700px}
  .scroll-hint{display:block}
  .faq-item summary{font-size:15px;padding:16px 18px;gap:12px}
  .faq-item .ans{padding:0 18px 18px 46px;font-size:14.5px}
  .cta-band{padding-bottom:56px}
  .cta-inner{padding:34px 24px;border-radius:16px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 100%}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-bottom .row{flex-direction:column;justify-content:flex-start}
}
@media (max-width:420px){
  .container{padding:0 18px}
  .hero h1{font-size:27px}
  .section-head h2{font-size:22px}
  .btn{height:44px;padding:0 18px}
  .tier-card{padding:22px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}