/* roulang page: index */
:root{
  --ink:#0D0A1E;
  --ink-2:#171236;
  --ink-3:#1E1842;
  --brand:#6C3BF4;
  --brand-2:#A855F7;
  --mint:#2BD9C4;
  --gold:#FFC46B;
  --surface:#F7F5FF;
  --surface-2:#FFFFFF;
  --line:#E7E2FA;
  --t1:#16113A;
  --t2:#5C5580;
  --t1d:#F4F1FF;
  --t2d:#B7AFD9;
  --grad:linear-gradient(120deg,#6C3BF4 0%,#A855F7 48%,#2BD9C4 100%);
  --grad-soft:linear-gradient(120deg,rgba(108,59,244,.10) 0%,rgba(168,85,247,.08) 48%,rgba(43,217,196,.10) 100%);
  --r-xs:8px;
  --r-sm:14px;
  --r-md:20px;
  --r-lg:24px;
  --r-xl:28px;
  --r-full:999px;
  --sh-light:0 10px 30px rgba(108,59,244,.10);
  --sh-light-hover:0 18px 44px rgba(108,59,244,.20);
  --sh-dark:0 16px 40px rgba(0,0,0,.45);
  --ease:cubic-bezier(.2,.8,.2,1);
  --dur:240ms;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  color:var(--t1);
  background:var(--surface);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(108,59,244,.22);}

.container{max-width:var(--container);margin:0 auto;padding:0 32px;width:100%;}
.section{padding:96px 0;}
.section--light{background:var(--surface);}
.section--white{background:var(--surface-2);}
.section--dark{background:var(--ink);color:var(--t1d);position:relative;overflow:hidden;}
.section--dark .muted{color:var(--t2d);}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.06em;font-weight:600;
  padding:6px 14px;border-radius:var(--r-full);
  border:1px solid var(--line);background:var(--surface-2);color:var(--brand);
}
.section--dark .eyebrow{border-color:rgba(255,255,255,.16);background:rgba(255,255,255,.05);color:var(--t2d);}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--grad);display:inline-block;}

h1,h2,h3{line-height:1.2;font-weight:800;letter-spacing:0;}
h1{font-size:48px;}
h2{font-size:34px;font-weight:800;}
h3{font-size:22px;font-weight:700;line-height:1.4;}
.lead{font-size:17px;color:var(--t2);line-height:1.9;}
.muted{color:var(--t2);}
.small{font-size:14px;line-height:1.7;color:var(--t2);}
.num{font-variant-numeric:tabular-nums;}

/* ---------- 顶部进度条 ---------- */
.progress-track{position:fixed;top:0;left:0;width:100%;height:2px;background:transparent;z-index:120;}
.progress-bar{height:2px;width:0;background:var(--grad);transition:width 120ms linear;}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(13,10,30,.72);
  transition:background var(--dur) var(--ease),box-shadow var(--dur) var(--ease),backdrop-filter var(--dur) var(--ease);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:var(--grad);opacity:0;transition:opacity var(--dur) var(--ease);
}
.site-header.is-scrolled{background:rgba(13,10,30,.96);box-shadow:0 12px 30px rgba(0,0,0,.38);}
.site-header.is-scrolled::after{opacity:.55;}
.nav{
  display:flex;align-items:center;gap:20px;
  height:76px;transition:height var(--dur) var(--ease);
}
.site-header.is-scrolled .nav{height:64px;}
.logo{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.logo-mark{
  width:38px;height:38px;border-radius:12px;background:var(--grad);
  display:grid;place-items:center;position:relative;flex-shrink:0;
  box-shadow:0 8px 20px rgba(108,59,244,.45);
}
.logo-mark svg{width:20px;height:20px;color:#fff;}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text strong{color:var(--t1d);font-size:16px;font-weight:800;letter-spacing:.02em;}
.logo-text em{font-style:normal;font-size:11px;color:var(--t2d);letter-spacing:.14em;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-links a{
  font-size:15px;color:var(--t2d);padding:9px 16px;border-radius:var(--r-full);
  border:1px solid transparent;transition:color var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease);
  white-space:nowrap;
}
.nav-links a:hover{color:var(--t1d);background:rgba(108,59,244,.20);}
.nav-links a.is-active{
  color:#fff;border-color:transparent;
  background:linear-gradient(120deg,rgba(108,59,244,.42),rgba(168,85,247,.30),rgba(43,217,196,.26));
}
.nav-links a.nav-cat{font-size:14px;color:var(--t1d);border-color:rgba(255,255,255,.14);}
.nav-cat:hover{border-color:rgba(43,217,196,.6)!important;}
.nav-cta{
  margin-left:14px;
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:12px 26px;border-radius:var(--r-full);
  background:var(--grad);color:#fff;font-size:15px;font-weight:700;
  box-shadow:0 10px 26px rgba(108,59,244,.42);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),filter var(--dur) var(--ease);
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(108,59,244,.55);filter:brightness(1.06);}
.nav-cta:active{transform:translateY(1px);}
.burger{
  display:none;width:46px;height:46px;border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.18);align-items:center;justify-content:center;
  margin-left:10px;
}
.burger span{display:block;width:18px;height:2px;background:var(--t1d);border-radius:2px;position:relative;transition:var(--dur) var(--ease);}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--t1d);border-radius:2px;
  transition:transform var(--dur) var(--ease),top var(--dur) var(--ease);
}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}

/* 移动抽屉 */
.drawer{
  position:fixed;inset:0;z-index:110;background:var(--ink);
  transform:translateY(-102%);transition:transform 300ms var(--ease);
  padding:88px 24px 32px;display:flex;flex-direction:column;gap:8px;overflow-y:auto;
}
.drawer.open{transform:translateY(0);}
.drawer .drawer-close{
  position:absolute;top:20px;right:20px;width:46px;height:46px;border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.18);color:var(--t1d);font-size:24px;line-height:1;
}
.drawer a.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:56px;padding:14px 18px;border-radius:var(--r-sm);
  color:var(--t1d);font-size:18px;font-weight:600;border:1px solid rgba(255,255,255,.08);
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.drawer a.drawer-link:hover{background:rgba(108,59,244,.26);border-color:rgba(168,85,247,.5);}
.drawer .drawer-cat{font-size:16px;color:var(--t2d);}
.drawer .drawer-cta{
  margin-top:16px;display:flex;align-items:center;justify-content:center;
  min-height:52px;border-radius:var(--r-full);background:var(--grad);color:#fff;font-weight:700;font-size:16px;
}
.drawer .drawer-title{font-size:12px;letter-spacing:.16em;color:var(--t2d);margin:14px 0 4px;}
body.no-scroll{overflow:hidden;}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:14px 28px;border-radius:var(--r-full);
  font-size:16px;font-weight:700;line-height:1.2;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),filter var(--dur) var(--ease);
  border:1px solid transparent;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 30px rgba(108,59,244,.42);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 40px rgba(108,59,244,.55);filter:brightness(1.06);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost-dark{background:transparent;color:var(--t1d);border-color:rgba(255,255,255,.25);}
.btn-ghost-dark:hover{background:rgba(108,59,244,.22);border-color:rgba(43,217,196,.55);transform:translateY(-2px);}
.btn-ghost-light{background:transparent;color:var(--brand);border-color:var(--brand);}
.btn-ghost-light:hover{background:rgba(108,59,244,.08);transform:translateY(-2px);}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;}
.text-link{
  color:var(--brand);font-weight:600;text-decoration:underline;
  text-underline-offset:3px;text-decoration-thickness:1px;
  transition:color var(--dur) var(--ease);
}
.text-link:hover{color:var(--mint);}
.section--dark .text-link{color:var(--mint);}
.section--dark .text-link:hover{color:#fff;}

/* ---------- Hero ---------- */
.hero{
  position:relative;background:var(--ink);color:var(--t1d);
  padding:168px 0 96px;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(1100px 620px at 84% -14%, rgba(168,85,247,.30), transparent 62%),
    radial-gradient(880px 520px at 6% 108%, rgba(43,217,196,.16), transparent 62%);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    radial-gradient(1.4px 1.4px at 12% 22%, rgba(255,255,255,.55), transparent 60%),
    radial-gradient(1.2px 1.2px at 32% 62%, rgba(255,255,255,.42), transparent 60%),
    radial-gradient(1.6px 1.6px at 58% 18%, rgba(255,255,255,.5), transparent 60%),
    radial-gradient(1.2px 1.2px at 76% 44%, rgba(255,255,255,.4), transparent 60%),
    radial-gradient(1.4px 1.4px at 88% 76%, rgba(255,255,255,.45), transparent 60%),
    radial-gradient(1.2px 1.2px at 46% 88%, rgba(255,255,255,.34), transparent 60%);
}
.hero .container{position:relative;z-index:2;}
.hero-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:center;}
.hero-copy{grid-column:span 6;}
.hero-visual{grid-column:span 6;position:relative;}
.hero h1{margin:20px 0 18px;color:#fff;}
.hero h1 .hl{
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:17px;color:var(--t2d);max-width:560px;line-height:1.9;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin:32px 0 40px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:16px;}
.stat{
  flex:1 1 128px;min-width:128px;
  border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.045);
  border-radius:var(--r-md);padding:16px 18px;
}
.stat b{display:block;font-size:32px;font-weight:800;color:var(--gold);font-variant-numeric:tabular-nums;line-height:1.15;}
.stat span{display:block;font-size:13px;color:var(--t2d);margin-top:4px;line-height:1.6;}
.hero-figure{
  border-radius:var(--r-xl);padding:1px;background:var(--grad);
  box-shadow:var(--sh-dark);
}
.hero-figure img{
  width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;
  border-radius:27px;display:block;
}
.float-badge{
  position:absolute;background:var(--surface-2);color:var(--t1);
  border-radius:var(--r-md);padding:12px 16px;border:1px solid var(--line);
  box-shadow:0 14px 34px rgba(0,0,0,.35);font-size:13px;line-height:1.5;
}
.float-badge b{display:block;font-size:20px;font-weight:800;font-variant-numeric:tabular-nums;color:var(--brand);}
.float-badge--1{left:-18px;top:26px;}
.float-badge--2{right:-14px;bottom:34px;}

/* ---------- 信任条 ---------- */
.trust{
  background:var(--ink-2);border-top:1px solid rgba(255,255,255,.07);
  border-bottom:1px solid rgba(255,255,255,.07);
}
.trust-wrap{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:84px;flex-wrap:wrap;padding:14px 0;
}
.trust-item{
  display:flex;align-items:center;gap:8px;font-size:14px;color:var(--t2d);white-space:nowrap;
}
.trust-item svg{width:16px;height:16px;color:var(--mint);flex-shrink:0;}

/* ---------- 卖点 ---------- */
.features-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:48px;}
.features-head{grid-column:span 4;}
.features-head h2{margin:16px 0 16px;}
.sticky{position:sticky;top:110px;}
.feature-list{grid-column:span 8;}
.feature-item{
  display:grid;grid-template-columns:64px 1fr;gap:18px;
  padding:28px 0;border-bottom:1px solid transparent;
  border-image:linear-gradient(90deg,rgba(108,59,244,0) 0%,rgba(168,85,247,.55) 45%,rgba(43,217,196,0) 100%) 1;
  transition:transform var(--dur) var(--ease);
}
.feature-item:first-child{padding-top:0;}
.feature-item:last-child{border-bottom:0;border-image:none;padding-bottom:0;}
.feature-item:hover{transform:translateX(4px);}
.feature-idx{
  font-size:26px;font-weight:800;font-variant-numeric:tabular-nums;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  line-height:1.2;
}
.feature-body h3{display:flex;align-items:center;gap:10px;margin-bottom:10px;}
.feature-body h3 svg{width:20px;height:20px;color:var(--brand);flex-shrink:0;}

/* ---------- 演示 ---------- */
.demo-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:40px;align-items:center;}
.demo-steps{grid-column:span 5;}
.demo-visual{grid-column:span 7;position:relative;}
.step-pill{
  display:flex;gap:14px;align-items:flex-start;
  padding:18px 20px;border-radius:var(--r-md);border:1px solid var(--line);
  background:var(--surface-2);margin-bottom:14px;cursor:pointer;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.step-pill:hover{transform:translateY(-2px);box-shadow:var(--sh-light);}
.step-pill.is-on{
  background:var(--grad);border-color:transparent;color:#fff;
  box-shadow:0 14px 34px rgba(108,59,244,.35);
}
.step-pill.is-on .step-desc,.step-pill.is-on .step-no{color:rgba(255,255,255,.85);}
.step-no{
  width:30px;height:30px;border-radius:50%;flex-shrink:0;
  display:grid;place-items:center;font-size:14px;font-weight:800;
  background:var(--grad-soft);color:var(--brand);font-variant-numeric:tabular-nums;
}
.step-pill.is-on .step-no{background:rgba(255,255,255,.22);color:#fff;}
.step-title{font-weight:700;font-size:16px;margin-bottom:4px;}
.step-desc{font-size:14px;color:var(--t2);line-height:1.7;}
.demo-frame{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  background:var(--surface-2);box-shadow:var(--sh-light);position:relative;
}
.demo-frame img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.tag-float{
  position:absolute;background:var(--surface-2);border:1px solid var(--line);
  border-radius:var(--r-full);padding:8px 16px;font-size:13px;font-weight:600;
  box-shadow:var(--sh-light);color:var(--t1);display:flex;align-items:center;gap:6px;
}
.tag-float i{width:7px;height:7px;border-radius:50%;background:var(--mint);display:inline-block;}
.tag-float--a{left:20px;bottom:20px;}
.tag-float--b{right:22px;top:22px;}
.tag-float--c{right:26px;bottom:64px;}

/* ---------- 证据 ---------- */
.proof-badges{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin:36px 0 64px;}
.proof-card{
  border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04);
  border-radius:var(--r-md);padding:24px 22px;
}
.proof-card b{display:block;font-size:40px;font-weight:800;font-variant-numeric:tabular-nums;line-height:1.1;color:var(--gold);}
.proof-card span{display:block;font-size:13px;color:var(--t2d);margin-top:6px;}
.quotes{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;margin-bottom:64px;}
.quote{
  border:1px solid rgba(255,255,255,.12);background:var(--ink-3);
  border-radius:var(--r-lg);padding:28px;box-shadow:var(--sh-dark);
}
.quote:nth-child(2){transform:translateY(32px);}
.quote p{color:var(--t1d);font-size:16px;line-height:1.9;}
.quote-meta{display:flex;align-items:center;gap:12px;margin-top:20px;}
.avatar{
  width:44px;height:44px;border-radius:50%;background:var(--grad);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:16px;flex-shrink:0;
}
.quote-meta strong{display:block;font-size:15px;color:var(--t1d);font-weight:700;}
.quote-meta em{font-style:normal;font-size:13px;color:var(--t2d);}
.scene-row{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.scene{
  border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.035);
  border-radius:var(--r-md);padding:24px;
}
.scene svg{width:24px;height:24px;color:var(--mint);margin-bottom:14px;}
.scene h3{font-size:18px;margin-bottom:8px;color:var(--t1d);}
.scene p{font-size:14px;color:var(--t2d);line-height:1.8;}

/* ---------- 资讯 ---------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:40px;flex-wrap:wrap;}
.news-head h2{margin-top:14px;}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.news-card{
  background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:18px;display:flex;flex-direction:column;height:100%;
  box-shadow:var(--sh-light);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-light-hover);border-color:rgba(108,59,244,.35);}
.news-card:hover .news-title{color:var(--brand);}
.news-cover{position:relative;border-radius:var(--r-md);overflow:hidden;}
.news-cover img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.badge-cat{
  position:absolute;left:12px;top:12px;
  background:var(--grad);color:#fff;font-size:12px;font-weight:700;
  padding:5px 12px;border-radius:var(--r-full);letter-spacing:.02em;
}
.news-title{
  font-size:18px;font-weight:700;line-height:1.5;margin:16px 0 10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color var(--dur) var(--ease);
}
.news-excerpt{
  font-size:14px;color:var(--t2);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  font-size:14px;color:var(--t2);
}
.news-foot span{font-variant-numeric:tabular-nums;}
.empty-state{
  grid-column:1/-1;min-height:220px;border:1px dashed var(--line);border-radius:var(--r-lg);
  background:var(--surface-2);display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:12px;padding:36px;text-align:center;
}
.empty-state svg{width:40px;height:40px;color:#C4BCE8;}
.empty-state p{color:var(--t2);font-size:15px;}

/* ---------- 价格 ---------- */
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;align-items:stretch;margin-top:44px;}
.price-card{
  position:relative;background:var(--surface-2);border:1px solid var(--line);
  border-radius:var(--r-xl);padding:32px 28px;display:flex;flex-direction:column;
  box-shadow:var(--sh-light);
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--sh-light-hover);}
.price-card--featured{
  transform:scale(1.04);
  border:1px solid transparent;
  background:linear-gradient(var(--surface-2),var(--surface-2)) padding-box,var(--grad) border-box;
  z-index:2;
}
.price-card--featured:hover{transform:scale(1.04) translateY(-4px);}
.price-tag{
  position:absolute;right:22px;top:-14px;background:var(--gold);color:#3A2600;
  font-size:12px;font-weight:800;padding:5px 14px;border-radius:var(--r-full);letter-spacing:.04em;
}
.price-name{font-size:19px;font-weight:800;}
.price-desc{font-size:14px;color:var(--t2);margin-top:8px;min-height:44px;}
.price-amount{display:flex;align-items:baseline;gap:6px;margin:20px 0 6px;}
.price-amount b{font-size:40px;font-weight:800;font-variant-numeric:tabular-nums;line-height:1;}
.price-amount em{font-style:normal;font-size:14px;color:var(--t2);}
.price-list{margin:22px 0 28px;display:flex;flex-direction:column;gap:12px;flex:1;}
.price-list li{display:flex;gap:10px;font-size:15px;color:var(--t2);line-height:1.7;}
.price-list svg{width:18px;height:18px;flex-shrink:0;margin-top:4px;color:var(--brand);}
.price-card .btn{width:100%;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px;margin:44px auto 0;}
.faq-item{
  background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:14px;overflow:hidden;transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.faq-item[open]{background:linear-gradient(120deg,rgba(108,59,244,.04),rgba(43,217,196,.04));border-color:rgba(108,59,244,.32);box-shadow:var(--sh-light);position:relative;}
.faq-item[open]::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--grad);}
.faq-item summary{
  cursor:pointer;list-style:none;padding:22px 56px 22px 24px;position:relative;
  font-size:17px;font-weight:700;color:var(--t1);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";position:absolute;right:24px;top:50%;transform:translateY(-50%);
  font-size:24px;font-weight:400;color:var(--brand);transition:transform var(--dur) var(--ease);
  line-height:1;
}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg);}
.faq-answer{padding:0 24px 24px;font-size:16px;color:var(--t2);line-height:1.9;}

/* ---------- CTA ---------- */
.cta-card{
  border-radius:var(--r-xl);padding:56px 48px;background:var(--grad);color:#fff;
  display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;
  box-shadow:0 26px 60px rgba(108,59,244,.42);
}
.cta-card h2{color:#fff;margin-bottom:14px;}
.cta-card p{color:rgba(255,255,255,.9);font-size:16px;}
.cta-form{display:flex;gap:12px;background:rgba(255,255,255,.16);padding:10px;border-radius:var(--r-full);}
.cta-form input{
  flex:1;min-width:0;border:1px solid transparent;border-radius:var(--r-full);
  padding:13px 18px;background:#fff;color:var(--t1);font-size:15px;
}
.cta-form input::placeholder{color:#9A93B8;}
.cta-form input:focus{outline:none;box-shadow:0 0 0 3px rgba(255,255,255,.6);}
.cta-form .btn{background:#120D2B;color:#fff;box-shadow:none;white-space:nowrap;}
.cta-form .btn:hover{background:#0D0A1E;filter:none;}
.cta-note{margin-top:12px;font-size:13px;color:rgba(255,255,255,.82);}
.form-alert{
  display:none;margin-top:14px;padding:12px 16px;border-radius:var(--r-sm);
  background:rgba(43,217,196,.16);border:1px solid rgba(43,217,196,.5);color:#EAFDF9;font-size:14px;
}
.form-alert.show{display:block;}
.form-alert.err{background:rgba(229,72,77,.16);border-color:rgba(229,72,77,.55);color:#FFE3E4;}
.cta-form input.has-error{box-shadow:0 0 0 2px #E5484D;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--t2d);padding:80px 0 0;position:relative;overflow:hidden;}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.35;
  background:radial-gradient(760px 380px at 88% 0%, rgba(108,59,244,.30), transparent 65%);
}
.site-footer .container{position:relative;z-index:2;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand .logo-text strong{color:var(--t1d);}
.footer-brand p{font-size:14px;margin-top:18px;line-height:1.85;max-width:320px;}
.footer-grid h4{font-size:15px;color:var(--t1d);font-weight:700;margin-bottom:18px;}
.footer-grid ul{display:flex;flex-direction:column;gap:11px;}
.footer-grid ul a{font-size:14px;transition:color var(--dur) var(--ease);}
.footer-grid ul a:hover{color:var(--mint);}
.footer-contact li{font-size:14px;display:flex;gap:10px;align-items:flex-start;}
.footer-contact svg{width:16px;height:16px;color:var(--mint);flex-shrink:0;margin-top:5px;}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.1);
  padding:24px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:90;
  display:flex;align-items:center;gap:10px;
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.float-cta.is-on{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta .btn{padding:13px 24px;font-size:15px;min-height:46px;}
.float-cta .btn-mini{
  background:var(--surface-2);color:var(--brand);border:1px solid var(--line);
  box-shadow:0 12px 28px rgba(0,0,0,.28);
}
.float-cta .btn-mini:hover{background:#fff;transform:translateY(-2px);}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 520ms var(--ease),transform 520ms var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .container{padding:0 28px;}
}
@media (max-width:1024px){
  h1{font-size:38px;}
  h2{font-size:28px;}
  .section{padding:72px 0;}
  .hero{padding:150px 0 80px;}
  .hero-copy,.hero-visual{grid-column:span 12;}
  .hero-visual{margin-top:44px;}
  .float-badge--1{left:12px;}
  .float-badge--2{right:12px;}
  .features-grid{grid-template-columns:1fr;gap:32px;}
  .features-head,.feature-list{grid-column:span 12;}
  .sticky{position:static;}
  .demo-grid{grid-template-columns:1fr;gap:32px;}
  .demo-steps,.demo-visual{grid-column:span 12;}
  .proof-badges{grid-template-columns:repeat(2,1fr);gap:16px;}
  .quotes{grid-template-columns:1fr;}
  .quote:nth-child(2){transform:none;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .pricing-grid{grid-template-columns:1fr;gap:22px;}
  .price-card--featured{transform:none;}
  .price-card--featured:hover{transform:translateY(-4px);}
  .cta-card{grid-template-columns:1fr;padding:44px 32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
}
@media (max-width:768px){
  body{font-size:16px;}
  h1{font-size:30px;}
  h2{font-size:24px;}
  h3{font-size:19px;}
  .section{padding:56px 0;}
  .container{padding:0 20px;}
  .nav-links,.nav-cta{display:none;}
  .burger{display:flex;}
  .hero{padding:132px 0 64px;}
  .hero-actions{flex-direction:column;gap:12px;}
  .hero-actions .btn{width:100%;}
  .hero-stats{gap:12px;}
  .stat{flex:1 1 calc(50% - 6px);min-width:0;padding:14px;}
  .stat b{font-size:26px;}
  .float-badge{padding:10px 13px;font-size:12px;}
  .float-badge b{font-size:17px;}
  .trust-wrap{justify-content:flex-start;gap:14px;min-height:0;padding:18px 0;}
  .trust-item{font-size:13px;}
  .feature-item{grid-template-columns:48px 1fr;gap:12px;padding:22px 0;}
  .feature-idx{font-size:22px;}
  .demo-steps{display:flex;gap:10px;overflow-x:auto;padding-bottom:8px;-webkit-overflow-scrolling:touch;}
  .step-pill{min-width:240px;margin-bottom:0;scroll-snap-align:start;}
  .news-grid{grid-template-columns:1fr;}
  .scene-row{
    display:flex;gap:14px;overflow-x:auto;padding-bottom:10px;
    scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;
  }
  .scene{min-width:78%;scroll-snap-align:start;}
  .proof-badges{grid-template-columns:1fr 1fr;}
  .proof-card b{font-size:32px;}
  .faq-item summary{font-size:16px;padding:18px 52px 18px 20px;}
  .faq-answer{padding:0 20px 20px;font-size:15px;}
  .cta-card{padding:34px 22px;border-radius:var(--r-lg);}
  .cta-form{flex-direction:column;border-radius:var(--r-lg);}
  .cta-form input,.cta-form .btn{width:100%;border-radius:var(--r-full);}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .site-footer{padding-top:56px;}
  .float-cta{right:0;left:0;bottom:0;padding:10px 16px calc(10px + env(safe-area-inset-bottom));gap:8px;background:rgba(13,10,30,.97);border-top:1px solid rgba(255,255,255,.12);transform:translateY(110%);}
  .float-cta.is-on{transform:translateY(0);}
  .float-cta .btn{flex:1;min-height:46px;padding:12px 16px;font-size:15px;}
  .float-cta .btn-mini{flex:0 0 auto;min-width:96px;}
}
@media (max-width:480px){
  .proof-badges{grid-template-columns:1fr;}
  .stat{flex:1 1 100%;}
  .quote{padding:22px;}
  .scene{min-width:86%;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:1ms!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --ink:#0D0A1E;--ink-2:#171236;--ink-3:#1E1842;
  --brand:#6C3BF4;--brand-2:#A855F7;--mint:#2BD9C4;--gold:#FFC46B;
  --surface:#F7F5FF;--surface-2:#FFFFFF;--line:#E7E2FA;
  --t1:#16113A;--t2:#5C5580;--t1d:#F4F1FF;--t2d:#B7AFD9;
  --grad:linear-gradient(120deg,#6C3BF4 0%,#A855F7 48%,#2BD9C4 100%);
  --sh-light:0 10px 30px rgba(108,59,244,.10);
  --sh-light-lg:0 18px 44px rgba(108,59,244,.16);
  --sh-dark:0 16px 40px rgba(0,0,0,.45);
  --r-s:8px;--r-m:14px;--r-c:20px;--r-k:24px;--r-l:28px;--r-p:999px;
  --ease:cubic-bezier(.2,.8,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;font-size:17px;line-height:1.85;font-weight:400;color:var(--t1);background:var(--surface);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none;transition:color .24s var(--ease),opacity .24s var(--ease)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.2;font-weight:800;letter-spacing:0}
p{margin:0}
time,.num{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section-light{background:var(--surface)}
.section-white{background:var(--surface-2)}
.section-dark{background:var(--ink);color:var(--t1d)}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.sec-title{font-size:34px}
.sec-title .accent{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.sec-sub{color:var(--t2);font-size:15px;margin-top:12px;max-width:660px}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:15px}
.text-link:hover{color:var(--brand-2)}
.divider-grad{height:1px;border:0;margin:0;background:linear-gradient(90deg,rgba(108,59,244,0),rgba(108,59,244,.55),rgba(43,217,196,0))}
/* header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:90;background:var(--ink);border-bottom:1px solid rgba(255,255,255,.06)}
.site-header::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;background:linear-gradient(90deg,rgba(108,59,244,0),rgba(168,85,247,.6),rgba(43,217,196,0))}
.site-header.scrolled{box-shadow:0 12px 32px rgba(0,0,0,.4)}
.nav{display:flex;align-items:center;gap:20px;height:76px;transition:height .26s var(--ease)}
.site-header.scrolled .nav{height:64px}
.logo{display:inline-flex;align-items:center;gap:12px;flex-shrink:0}
.logo-mark{width:38px;height:38px;border-radius:12px;background:var(--grad);display:grid;place-items:center;color:#fff;flex-shrink:0}
.logo-mark svg{width:20px;height:20px}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text strong{font-size:16px;font-weight:800;color:#fff}
.logo-text em{font-style:normal;font-size:12px;color:var(--t2d);letter-spacing:.02em}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;margin-right:4px}
.nav-links a{padding:9px 14px;border-radius:var(--r-p);font-size:14.5px;color:var(--t2d);white-space:nowrap}
.nav-links a:hover{background:rgba(108,59,244,.22);color:#fff}
.nav-links a.is-active{color:#fff;background:rgba(108,59,244,.18);box-shadow:inset 0 0 0 1px rgba(168,85,247,.65)}
.nav-links a.nav-cat{color:#D9D2F5}
.nav-cta{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:12px 24px;border-radius:var(--r-p);background:var(--grad);color:#fff;font-size:15px;font-weight:600;box-shadow:0 8px 22px rgba(108,59,244,.34);white-space:nowrap;transition:transform .24s var(--ease),box-shadow .24s var(--ease),filter .24s var(--ease)}
.nav-cta:hover{transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 14px 30px rgba(108,59,244,.45)}
.burger{display:none;width:44px;height:44px;border-radius:var(--r-m);border:1px solid rgba(255,255,255,.2);position:relative;margin-left:auto}
.burger span,.burger span::before,.burger span::after{position:absolute;left:50%;width:18px;height:2px;background:#fff;border-radius:2px;content:"";transform:translateX(-50%)}
.burger span{top:50%;margin-top:-1px}
.burger span::before{top:-6px}
.burger span::after{top:6px}
.scroll-progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--grad);z-index:120;transition:width .12s linear}
/* hero */
.page-hero{position:relative;background:var(--ink);color:var(--t1d);padding:126px 0 56px;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;background-image:radial-gradient(1.5px 1.5px at 12% 26%,rgba(255,255,255,.6),transparent 60%),radial-gradient(1.5px 1.5px at 68% 18%,rgba(255,255,255,.45),transparent 60%),radial-gradient(1.5px 1.5px at 84% 62%,rgba(255,255,255,.4),transparent 60%),radial-gradient(1.5px 1.5px at 32% 74%,rgba(255,255,255,.35),transparent 60%)}
.page-hero::after{content:"";position:absolute;right:-120px;top:-140px;width:460px;height:460px;border-radius:50%;background:radial-gradient(circle,rgba(108,59,244,.35),rgba(43,217,196,0) 68%);pointer-events:none}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--t2d);margin-bottom:20px;overflow:hidden}
.breadcrumb a:hover{color:var(--mint)}
.breadcrumb .sep{opacity:.55}
.breadcrumb .now{color:#fff;max-width:340px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hero-title{font-size:48px;max-width:900px;color:#fff}
.meta-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:22px;font-size:14px;color:var(--t2d)}
.badge-cat{display:inline-flex;align-items:center;padding:5px 14px;border-radius:var(--r-p);font-size:13px;color:#fff;background:var(--grad)}
.meta-row .dot{opacity:.5}
.hero-rule{height:1px;margin-top:28px;background:linear-gradient(90deg,rgba(108,59,244,0),rgba(168,85,247,.7),rgba(43,217,196,0))}
/* article layout */
.article-section{padding:72px 0 96px}
.article-layout{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:40px;align-items:start}
.article-main{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-l);padding:44px 44px 36px;box-shadow:var(--sh-light);min-width:0}
.article-body{max-width:800px;font-size:17px;line-height:1.9;color:var(--t1);word-break:break-word}
.article-body>*+*{margin-top:1.2em}
.article-body>p:first-of-type{font-size:18px}
.article-body h2{position:relative;padding-left:18px;font-size:34px;margin-top:48px;margin-bottom:.55em;line-height:1.3}
.article-body h2::before{content:"";position:absolute;left:0;top:.34em;width:4px;height:20px;border-radius:var(--r-p);background:var(--grad)}
.article-body h3{font-size:22px;margin-top:34px;margin-bottom:.5em;line-height:1.35}
.article-body h4{font-size:19px;margin-top:26px;margin-bottom:.45em}
.article-body a{color:var(--brand);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.article-body a:hover{color:var(--brand-2)}
.article-body ul,.article-body ol{padding-left:22px}
.article-body ul{list-style:none;padding-left:4px}
.article-body ul li{position:relative;padding-left:20px;margin:.55em 0}
.article-body ul li::before{content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--grad)}
.article-body ol{list-style:decimal}
.article-body ol li{margin:.55em 0}
.article-body img{border-radius:var(--r-c);margin:1.4em 0;box-shadow:var(--sh-light)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;color:var(--t2);text-align:center;margin-top:12px}
.article-body blockquote{margin:1.6em 0;padding:20px 24px;border-left:3px solid;border-image:var(--grad) 1;background:rgba(108,59,244,.06);border-radius:0 var(--r-m) var(--r-m) 0;color:#2C2559}
.article-body blockquote p{margin:0}
.article-body code{background:rgba(108,59,244,.1);color:#4B2BB5;padding:2px 7px;border-radius:6px;font-size:.92em}
.article-body pre{background:var(--ink-2);color:var(--t1d);padding:20px;border-radius:var(--r-m);overflow-x:auto;margin:1.5em 0}
.article-body pre code{background:none;color:inherit;padding:0}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15.5px}
.article-body thead th{background:rgba(108,59,244,.09);text-align:left;font-weight:700}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line)}
.article-body hr{border:0;height:1px;background:var(--line);margin:2em 0}
.article-body strong{font-weight:700}
/* tags + related */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:44px;padding-top:28px;border-top:1px solid var(--line)}
.tag{display:inline-flex;align-items:center;padding:7px 16px;border-radius:var(--r-p);font-size:13.5px;color:var(--t2);background:var(--surface);border:1px solid var(--line);transition:color .24s var(--ease),border-color .24s var(--ease),background .24s var(--ease)}
.tag:hover{color:var(--brand);border-color:rgba(108,59,244,.45);background:rgba(108,59,244,.07)}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:40px}
.pager-card{display:flex;flex-direction:column;gap:8px;padding:24px;border-radius:var(--r-k);border:1px solid var(--line);background:var(--surface-2);box-shadow:var(--sh-light);transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease)}
.pager-card:hover{transform:translateY(-4px);box-shadow:var(--sh-light-lg);border-color:rgba(108,59,244,.35)}
.pager-card small{font-size:13px;color:var(--t2)}
.pager-card strong{font-size:17px;font-weight:700}
.pager-card:hover strong{color:var(--brand)}
.pager-foot{display:flex;justify-content:center;margin-top:36px}
/* sidebar */
.article-side{position:sticky;top:100px;display:grid;gap:20px;min-width:0}
.side-card{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-k);padding:24px;box-shadow:var(--sh-light)}
.side-card h3{font-size:17px;margin-bottom:16px}
.toc-card summary{list-style:none;cursor:pointer;font-size:17px;font-weight:800;display:flex;align-items:center;justify-content:space-between;gap:12px}
.toc-card summary::-webkit-details-marker{display:none}
.toc-card summary::after{content:"+";font-size:18px;color:var(--brand);font-weight:700}
.toc-card[open] summary::after{content:"–"}
.toc-card[open] summary{margin-bottom:14px}
.toc-nav ol{display:grid;gap:2px;counter-reset:toc}
.toc-nav a{display:block;font-size:14px;color:var(--t2);padding:6px 0 6px 14px;border-left:2px solid var(--line);line-height:1.6}
.toc-nav a:hover{color:var(--brand);border-left-color:var(--brand-2)}
.toc-nav a.is-current{color:var(--brand);border-left-color:var(--brand);font-weight:600}
.toc-nav .lvl-3 a{padding-left:28px;font-size:13.5px}
.side-list{display:grid;gap:12px}
.side-list a{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--t2);line-height:1.65}
.side-list a:hover{color:var(--brand)}
.side-list .idx{flex-shrink:0;width:22px;height:22px;border-radius:8px;display:grid;place-items:center;font-size:12px;font-weight:700;color:#fff;background:var(--grad);margin-top:2px}
.side-cta{background:var(--ink-2);border-color:rgba(255,255,255,.08);color:var(--t1d)}
.side-cta h3{color:#fff}
.side-cta p{font-size:14px;color:var(--t2d);line-height:1.75;margin-bottom:18px}
.side-cta .btn{width:100%}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:13px 28px;border-radius:var(--r-p);font-size:16px;font-weight:600;border:1px solid transparent;transition:transform .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease),color .24s var(--ease),filter .24s var(--ease)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 26px rgba(108,59,244,.32)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 16px 34px rgba(108,59,244,.42)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{border-color:var(--brand);color:var(--brand);background:transparent}
.btn-outline:hover{background:rgba(108,59,244,.08);transform:translateY(-2px)}
.btn-ghost{border-color:rgba(255,255,255,.25);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.08);transform:translateY(-2px)}
.btn-sm{padding:10px 20px;font-size:14.5px;min-height:40px}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none}
/* cards */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.news-card{display:flex;flex-direction:column;background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-k);overflow:hidden;box-shadow:var(--sh-light);transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease)}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-light-lg);border-color:rgba(108,59,244,.3)}
.news-cover{position:relative;aspect-ratio:16/10;background:var(--surface);overflow:hidden}
.news-cover img{width:100%;height:100%;object-fit:cover}
.news-chip{position:absolute;left:14px;top:14px;padding:5px 12px;border-radius:var(--r-p);font-size:12.5px;color:#fff;background:rgba(13,10,30,.72);border:1px solid rgba(255,255,255,.22)}
.news-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-body h3{font-size:19px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card:hover h3{color:var(--brand)}
.news-body p{font-size:14.5px;color:var(--t2);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-foot{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:12px;font-size:14px;color:var(--t2)}
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;min-height:220px;padding:48px 24px;text-align:center;color:var(--t2);background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-k)}
.empty-state svg{width:52px;height:52px;color:#C9C2E8}
/* cta band */
.cta-section{padding:96px 0}
.cta-band{border-radius:var(--r-l);padding:56px 48px;background:linear-gradient(120deg,rgba(108,59,244,.34),rgba(43,217,196,.18)),var(--ink-2);border:1px solid rgba(255,255,255,.08);box-shadow:var(--sh-dark);display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-band h2{font-size:34px;color:#fff;max-width:560px}
.cta-band p{color:var(--t2d);margin-top:14px;max-width:600px;font-size:15.5px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
/* footer */
.site-footer{background:var(--ink);color:var(--t2d);padding:72px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand p{font-size:14.5px;line-height:1.8;margin-top:18px;max-width:340px;color:var(--t2d)}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:18px}
.site-footer ul{display:grid;gap:12px}
.site-footer ul a{font-size:14.5px;color:var(--t2d)}
.site-footer ul a:hover{color:var(--mint)}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;line-height:1.7}
.footer-contact svg{width:18px;height:18px;flex-shrink:0;margin-top:4px;color:var(--mint)}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:24px;font-size:13.5px;color:rgba(183,175,217,.85)}
/* float cta */
.float-cta{position:fixed;right:24px;bottom:24px;z-index:100;display:flex;align-items:center;gap:10px;padding:10px;border-radius:var(--r-p);background:var(--ink-2);border:1px solid rgba(255,255,255,.1);box-shadow:0 18px 44px rgba(13,10,30,.5);opacity:0;visibility:hidden;transform:translateY(14px);transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s var(--ease)}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta .btn-mini{display:inline-flex;align-items:center;min-height:44px;padding:0 18px;border-radius:var(--r-p);font-size:14px;color:var(--t1d);border:1px solid rgba(255,255,255,.22)}
.float-cta .btn-mini:hover{background:rgba(255,255,255,.08);color:#fff}
.reveal{opacity:0;transform:translateY(12px)}
.reveal.in{opacity:1;transform:none;transition:opacity .6s var(--ease),transform .6s var(--ease)}
@media (prefers-reduced-motion:reduce){.reveal,.reveal.in{opacity:1;transform:none;transition:none}*{scroll-behavior:auto}}
@media (max-width:1280px){.container{padding:0 28px}}
@media (max-width:1024px){
  .section{padding:72px 0}
  .article-layout{grid-template-columns:1fr;gap:32px}
  .article-side{position:static}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .hero-title{font-size:36px}
  .sec-title,.cta-band h2{font-size:30px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .nav{height:64px}
  .nav-links{position:fixed;left:0;right:0;top:64px;bottom:0;flex-direction:column;align-items:stretch;gap:6px;padding:20px;background:var(--ink);overflow-y:auto;margin:0;transform:translateY(-12px);opacity:0;visibility:hidden;transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s var(--ease)}
  .nav-links.open{opacity:1;visibility:visible;transform:none}
  .nav-links a{padding:14px 16px;font-size:16px;border-radius:var(--r-m);min-height:44px;display:flex;align-items:center}
  .nav-cta{display:none}
  .burger{display:block}
  .page-hero{padding:104px 0 44px}
  .hero-title{font-size:30px}
  .breadcrumb .now{max-width:200px}
  .article-section{padding:48px 0 64px}
  .article-main{padding:26px 20px 24px;border-radius:var(--r-k)}
  .article-body h2{font-size:24px;margin-top:36px}
  .article-body h3{font-size:19px}
  .article-body>p:first-of-type{font-size:17px}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap}
  .card-grid{grid-template-columns:1fr}
  .pager{grid-template-columns:1fr}
  .cta-band{padding:36px 24px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .float-cta{right:0;left:0;bottom:0;border-radius:0;padding:8px 14px calc(8px + env(safe-area-inset-bottom));gap:8px;justify-content:space-between;border-left:0;border-right:0;border-bottom:0}
  .float-cta .btn{flex:1;padding:12px 16px;font-size:15px}
  .float-cta .btn-mini{flex:0 0 auto;padding:0 14px}
}
@media (max-width:480px){
  .hero-title{font-size:26px}
  .sec-title,.cta-band h2{font-size:24px}
  .logo-text strong{font-size:15px}
  .article-body h2{font-size:21px}
}

/* roulang page: category1 */
:root{
  --ink:#0D0A1E;
  --ink-2:#171236;
  --ink-3:#1E1842;
  --brand:#6C3BF4;
  --brand-2:#A855F7;
  --mint:#2BD9C4;
  --gold:#FFC46B;
  --surface:#F7F5FF;
  --surface-2:#FFFFFF;
  --line:#E7E2FA;
  --t1:#16113A;
  --t2:#5C5580;
  --t1d:#F4F1FF;
  --t2d:#B7AFD9;
  --grad:linear-gradient(120deg,#6C3BF4 0%,#A855F7 48%,#2BD9C4 100%);
  --r8:8px; --r14:14px; --r20:20px; --r24:24px; --r28:28px;
  --sh-light:0 10px 30px rgba(108,59,244,.10);
  --sh-light-hover:0 18px 42px rgba(108,59,244,.18);
  --sh-dark:0 16px 40px rgba(0,0,0,.45);
  --ease:cubic-bezier(.2,.8,.2,1);
  --header-h:76px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-top:var(--header-h);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:17px;
  line-height:1.85;
  color:var(--t1);
  background:var(--surface);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .24s var(--ease),border-color .24s var(--ease)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit;color:inherit}
h1,h2,h3,h4,p,figure{margin:0}
ul,ol{list-style:none;margin:0;padding:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section--surface{background:var(--surface)}
.section--white{background:var(--surface-2)}
.section--dark{background:var(--ink);color:var(--t1d);position:relative;overflow:hidden}
.section-head{max-width:780px;margin-bottom:40px}
.h1{font-size:clamp(30px,4vw,46px);line-height:1.22;font-weight:800;letter-spacing:0}
.h2{font-size:clamp(24px,2.6vw,34px);line-height:1.25;font-weight:800;letter-spacing:0}
.h3{font-size:clamp(19px,1.8vw,22px);line-height:1.4;font-weight:700}
.body{font-size:16px;line-height:1.85;color:var(--t2)}
.body-d{font-size:16px;line-height:1.85;color:var(--t2d)}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13.5px;font-weight:700;letter-spacing:.12em;color:var(--brand)}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--grad)}
.eyebrow--dark{color:var(--mint)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:13px 28px;border-radius:999px;
  font-size:15.5px;font-weight:700;line-height:1;white-space:nowrap;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),filter .24s var(--ease);
}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn--primary{color:#fff;background:var(--grad);box-shadow:0 12px 26px rgba(108,59,244,.35)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(108,59,244,.45);filter:brightness(1.06)}
.btn--primary:active{transform:translateY(1px)}
.btn--ghost-dark{color:var(--t1d);border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.03)}
.btn--ghost-dark:hover{background:rgba(108,59,244,.20);border-color:rgba(168,85,247,.6);transform:translateY(-2px)}
.btn--ghost{color:var(--brand);border:1px solid rgba(108,59,244,.5);background:transparent}
.btn--ghost:hover{background:rgba(108,59,244,.08);transform:translateY(-2px)}
.btn--sm{min-height:40px;padding:10px 20px;font-size:14.5px}

.text-link{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-weight:700;font-size:15px;border-bottom:1px solid rgba(108,59,244,.35);padding-bottom:2px}
.text-link:hover{color:var(--brand-2);border-color:var(--brand-2)}
.text-link svg{width:16px;height:16px;transition:transform .24s var(--ease)}
.text-link:hover svg{transform:translateX(3px)}

/* ---------- 滚动进度条 ---------- */
.scroll-progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--grad);z-index:140;transition:width .1s linear}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;height:var(--header-h);
  background:rgba(13,10,30,.94);
  border-bottom:1px solid rgba(255,255,255,.06);
  transition:background .26s var(--ease),box-shadow .26s var(--ease);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:var(--grad);opacity:0;transition:opacity .26s var(--ease);
}
.site-header.is-scrolled{background:var(--ink);box-shadow:0 12px 30px rgba(0,0,0,.38)}
.site-header.is-scrolled::after{opacity:.85}
.nav{height:100%;display:flex;align-items:center;gap:16px}
.logo{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.logo-mark{
  width:38px;height:38px;border-radius:12px;background:var(--grad);
  display:grid;place-items:center;color:#fff;flex:0 0 auto;
  box-shadow:0 8px 20px rgba(108,59,244,.40);
}
.logo-mark svg{width:22px;height:22px}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text strong{font-size:16px;font-weight:800;color:var(--t1d);letter-spacing:.01em}
.logo-text em{font-size:12px;font-style:normal;color:var(--t2d);letter-spacing:.16em}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-links a{
  display:inline-flex;align-items:center;
  padding:9px 14px;border-radius:999px;font-size:15px;color:var(--t2d);
  transition:background .24s var(--ease),color .24s var(--ease),box-shadow .24s var(--ease);
}
.nav-links a:hover{background:rgba(255,255,255,.08);color:var(--t1d)}
.nav-links a.nav-cat{border:1px solid rgba(255,255,255,.14)}
.nav-links a.nav-cat:hover{border-color:rgba(168,85,247,.55)}
.nav-links a.is-active{
  color:#fff;
  background:linear-gradient(120deg,rgba(108,59,244,.30),rgba(168,85,247,.22) 48%,rgba(43,217,196,.20));
  box-shadow:inset 0 0 0 1px rgba(168,85,247,.75);
}
.nav-cta{
  flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:12px 24px;border-radius:999px;
  font-size:15px;font-weight:700;color:#fff;background:var(--grad);
  box-shadow:0 10px 24px rgba(108,59,244,.40);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),filter .24s var(--ease);
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(108,59,244,.5);filter:brightness(1.06)}
.burger{
  display:none;width:44px;height:44px;border-radius:14px;
  border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.04);
  align-items:center;justify-content:center;flex:0 0 auto;
}
.burger span{position:relative;display:block;width:18px;height:2px;border-radius:2px;background:var(--t1d);transition:transform .26s var(--ease),background .26s var(--ease)}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--t1d);transition:transform .26s var(--ease),opacity .26s var(--ease)}
.burger span::before{top:-6px}
.burger span::after{top:6px}
body.nav-open .burger span{background:transparent}
body.nav-open .burger span::before{transform:translateY(6px) rotate(45deg)}
body.nav-open .burger span::after{transform:translateY(-6px) rotate(-45deg)}
.nav-drawer-cta{display:none}

/* ---------- 频道头 ---------- */
.channel-head{
  position:relative;overflow:hidden;
  background:var(--ink);color:var(--t1d);
  padding:64px 0 72px;min-height:320px;
  display:flex;align-items:center;
}
.channel-head::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(circle at 10% 22%,rgba(255,255,255,.40) 0 1px,transparent 1.6px),
    radial-gradient(circle at 27% 68%,rgba(255,255,255,.26) 0 1px,transparent 1.6px),
    radial-gradient(circle at 52% 14%,rgba(255,255,255,.30) 0 1.2px,transparent 1.8px),
    radial-gradient(circle at 71% 78%,rgba(255,255,255,.24) 0 1px,transparent 1.6px),
    radial-gradient(circle at 88% 34%,rgba(255,255,255,.34) 0 1.4px,transparent 2px),
    radial-gradient(560px 360px at 82% 8%,rgba(108,59,244,.34),transparent 70%),
    radial-gradient(420px 300px at 6% 96%,rgba(43,217,196,.16),transparent 72%);
  opacity:.85;
}
.channel-head::after{
  content:"";position:absolute;right:-150px;top:-170px;width:520px;height:520px;
  border-radius:50%;border:1px solid rgba(168,85,247,.30);
  box-shadow:inset 0 0 140px rgba(108,59,244,.22);
  pointer-events:none;
}
.channel-head .container{position:relative;z-index:2}
.channel-grid{display:grid;grid-template-columns:1.35fr .85fr;gap:48px;align-items:center}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--t2d);margin-bottom:20px}
.crumbs a{color:var(--t2d)}
.crumbs a:hover{color:var(--mint)}
.crumbs .sep{opacity:.5}
.crumbs .current{color:var(--t1d)}
.channel-lead{margin-top:20px;max-width:660px;font-size:16.5px;line-height:1.9;color:var(--t2d)}
.channel-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.channel-media{
  border-radius:24px;overflow:hidden;aspect-ratio:4/3;
  border:1px solid rgba(255,255,255,.12);box-shadow:var(--sh-dark);
  background:var(--ink-3);
}
.channel-media img{width:100%;height:100%;object-fit:cover}

/* ---------- 交替图文大卡 ---------- */
.alt-list{display:flex;flex-direction:column;gap:32px}
.alt-card{
  display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;
  background:var(--surface-2);border:1px solid var(--line);border-radius:28px;
  padding:32px;box-shadow:var(--sh-light);
  transition:box-shadow .26s var(--ease),transform .26s var(--ease);
}
.alt-card:hover{box-shadow:var(--sh-light-hover);transform:translateY(-3px)}
.alt-card--flip .alt-media{order:-1}
.alt-media{border-radius:20px;overflow:hidden;aspect-ratio:16/10;background:var(--surface)}
.alt-media img{width:100%;height:100%;object-fit:cover}
.alt-body{padding:8px 6px}
.alt-num{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;border-radius:999px;
  background:rgba(255,196,107,.14);border:1px solid rgba(255,196,107,.5);
  color:#8A5A12;font-size:13px;font-weight:800;letter-spacing:.08em;
}
.alt-card .h2{margin-top:16px}
.alt-card .body{margin-top:16px}
.alt-card .body + .body{margin-top:12px}
.alt-card .text-link{margin-top:22px}

/* ---------- 指标横条 ---------- */
.metric-strip{
  background:var(--ink-2);border:1px solid rgba(255,255,255,.06);
  border-radius:28px;padding:38px 32px;box-shadow:var(--sh-dark);
  display:grid;grid-template-columns:repeat(3,1fr);
}
.metric{position:relative;text-align:center;padding:0 18px}
.metric:not(:first-child)::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:1px;height:70%;
  background:linear-gradient(180deg,transparent,rgba(168,85,247,.85),transparent);
}
.metric-num{
  font-size:clamp(32px,4vw,40px);font-weight:800;line-height:1.1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.metric-num--gold{background:none;color:var(--gold);-webkit-text-fill-color:var(--gold)}
.metric-label{margin-top:10px;font-size:14px;color:var(--t2d)}
.metric-unit{font-size:16px;font-weight:700;margin-left:4px}

/* ---------- FAQ ---------- */
.faq{max-width:880px;margin:0 auto}
.qa{
  position:relative;background:var(--surface-2);border:1px solid var(--line);
  border-radius:20px;margin-bottom:16px;overflow:hidden;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease);
}
.qa[open]{
  background:linear-gradient(120deg,rgba(108,59,244,.05),rgba(43,217,196,.05));
  border-color:rgba(108,59,244,.28);
  box-shadow:0 10px 26px rgba(108,59,244,.12);
}
.qa[open]::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--grad)}
.qa summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 26px;font-size:17px;font-weight:700;cursor:pointer;list-style:none;
}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{
  content:"+";flex:0 0 auto;width:30px;height:30px;line-height:27px;text-align:center;
  border-radius:999px;border:1px solid var(--line);color:var(--brand);font-size:20px;font-weight:400;
  transition:transform .26s var(--ease),background .26s var(--ease);
}
.qa[open] summary::after{transform:rotate(45deg);background:rgba(108,59,244,.10)}
.qa-body{padding:0 26px 24px;font-size:16px;line-height:1.85;color:var(--t2)}
.qa-body a{color:var(--brand);border-bottom:1px solid rgba(108,59,244,.4)}

/* ---------- CTA 带 ---------- */
.cta-wrap{padding:96px 0}
.cta-card{
  position:relative;overflow:hidden;border-radius:28px;padding:56px 48px;
  background:var(--ink-2);border:1px solid rgba(255,255,255,.08);
  box-shadow:var(--sh-dark);
  display:grid;grid-template-columns:1.5fr auto;gap:32px;align-items:center;
}
.cta-card::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(circle at 14% 30%,rgba(255,255,255,.30) 0 1px,transparent 1.6px),
    radial-gradient(circle at 62% 74%,rgba(255,255,255,.22) 0 1px,transparent 1.6px),
    radial-gradient(circle at 88% 22%,rgba(255,255,255,.26) 0 1.2px,transparent 1.8px),
    radial-gradient(480px 300px at 92% 110%,rgba(43,217,196,.20),transparent 70%),
    radial-gradient(520px 320px at 4% -20%,rgba(108,59,244,.35),transparent 72%);
  opacity:.9;
}
.cta-card > *{position:relative;z-index:2}
.cta-card p{margin-top:14px;color:var(--t2d);font-size:16px;max-width:600px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--t2d);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;padding-bottom:48px}
.footer-brand p{margin-top:20px;font-size:15px;line-height:1.85;color:var(--t2d);max-width:350px}
.site-footer h4{font-size:15px;font-weight:800;color:var(--t1d);margin-bottom:18px;letter-spacing:.02em}
.site-footer ul li{margin-bottom:12px;font-size:15px}
.site-footer ul li a:hover{color:var(--mint)}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;line-height:1.75}
.footer-contact svg{flex:0 0 auto;width:18px;height:18px;margin-top:4px;color:var(--mint)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:var(--t2d);
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:110;
  display:flex;align-items:center;gap:10px;padding:10px;
  border-radius:999px;background:var(--ink-2);
  border:1px solid rgba(255,255,255,.10);
  box-shadow:0 18px 44px rgba(0,0,0,.45);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s var(--ease);
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:none}

/* ---------- 移动端导航 ---------- */
@media (max-width:768px){
  :root{--header-h:64px}
  .container{padding:0 20px}
  .nav{gap:10px}
  .logo-mark{width:34px;height:34px;border-radius:10px}
  .logo-text strong{font-size:15px}
  .logo-text em{font-size:11px;letter-spacing:.12em}
  .burger{display:flex}
  .nav-cta{display:none}
  .nav-links{
    position:fixed;top:var(--header-h);left:0;right:0;
    height:calc(100dvh - var(--header-h));
    background:var(--ink-2);
    flex-direction:column;align-items:stretch;gap:6px;
    padding:24px 20px calc(32px + env(safe-area-inset-bottom));
    margin-left:0;overflow-y:auto;
    border-top:1px solid rgba(255,255,255,.06);
    transform:translateY(-14px);opacity:0;visibility:hidden;
    transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s var(--ease);
  }
  body.nav-open{overflow:hidden}
  body.nav-open .nav-links{opacity:1;visibility:visible;transform:none}
  .nav-links a{
    padding:16px 18px;font-size:17px;border-radius:14px;
    background:rgba(255,255,255,.03);
  }
  .nav-links a.nav-cat{border-color:rgba(255,255,255,.12)}
  .nav-drawer-cta{display:inline-flex;width:100%;margin-top:12px;min-height:48px}
}

/* ---------- 平板与手机 ---------- */
@media (max-width:1024px){
  .section{padding:72px 0}
  .cta-wrap{padding:72px 0}
  .channel-grid{grid-template-columns:1fr;gap:32px}
  .channel-media{max-width:520px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
  .alt-card{grid-template-columns:1fr;gap:26px;padding:24px}
  .alt-card--flip .alt-media{order:0}
  .cta-card{grid-template-columns:1fr;padding:40px 28px}
}
@media (max-width:768px){
  body{font-size:16px}
  .section{padding:56px 0}
  .section-head{margin-bottom:28px}
  .channel-head{padding:44px 0 52px;min-height:auto}
  .channel-actions{flex-direction:column;align-items:stretch}
  .channel-actions .btn{width:100%}
  .metric-strip{grid-template-columns:1fr;padding:28px 22px;gap:22px}
  .metric{padding:0}
  .metric:not(:first-child)::before{
    left:50%;top:0;transform:translateX(-50%);
    width:64%;height:1px;
    background:linear-gradient(90deg,transparent,rgba(168,85,247,.85),transparent);
  }
  .qa summary{padding:18px 20px;font-size:16px}
  .qa-body{padding:0 20px 20px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;gap:8px}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    justify-content:space-between;gap:12px;
  }
  .float-cta .btn{flex:1;min-height:44px;padding:12px 14px;font-size:15px}
}
@media (max-width:480px){
  .container{padding:0 16px}
  .alt-card{padding:20px}
  .cta-card{padding:32px 22px}
}

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

/* roulang page: category2 */
:root{
  --ink:#0D0A1E;
  --ink-2:#171236;
  --ink-3:#1E1842;
  --brand:#6C3BF4;
  --brand-2:#A855F7;
  --mint:#2BD9C4;
  --gold:#FFC46B;
  --surface:#F7F5FF;
  --surface-2:#FFFFFF;
  --line:#E7E2FA;
  --t1:#16113A;
  --t2:#5C5580;
  --t1d:#F4F1FF;
  --t2d:#B7AFD9;
  --grad:linear-gradient(120deg,#6C3BF4 0%,#A855F7 48%,#2BD9C4 100%);
  --grad-soft:linear-gradient(120deg,rgba(108,59,244,.10) 0%,rgba(168,85,247,.07) 48%,rgba(43,217,196,.09) 100%);
  --r-xs:8px;
  --r-input:14px;
  --r-sm:20px;
  --r-card:24px;
  --r-lg:28px;
  --r-pill:999px;
  --sh-light:0 10px 30px rgba(108,59,244,.10);
  --sh-light-hover:0 18px 40px rgba(108,59,244,.18);
  --sh-deep:0 16px 40px rgba(0,0,0,.45);
  --ease:cubic-bezier(.2,.8,.2,1);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.85;
  color:var(--t1);
  background:var(--surface-2);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .24s var(--ease),border-color .24s var(--ease),background-color .24s var(--ease);}
button,input{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.2;font-weight:700;letter-spacing:0;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:var(--r-xs);}
.container{max-width:1200px;margin:0 auto;padding:0 32px;}
.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-variant-numeric:tabular-nums;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:70;
  background:var(--ink);
  transition:box-shadow .24s var(--ease),background-color .24s var(--ease);
}
.site-header.is-scrolled{
  background:#0A0820;
  box-shadow:0 10px 30px rgba(0,0,0,.4);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:var(--grad);
  opacity:.55;
}
.scroll-progress{
  position:absolute;
  left:0;top:0;
  height:2px;
  width:0%;
  background:var(--grad);
  z-index:5;
  transition:width .12s linear;
}
.nav{
  display:flex;
  align-items:center;
  gap:20px;
  height:76px;
  transition:height .24s var(--ease);
}
.site-header.is-scrolled .nav{height:64px;}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.logo-mark{
  width:36px;height:36px;
  border-radius:var(--r-pill);
  background:var(--grad);
  display:grid;place-items:center;
  color:#fff;
  box-shadow:0 6px 18px rgba(108,59,244,.45);
  position:relative;
}
.logo-mark svg{width:20px;height:20px;}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text strong{font-size:16px;font-weight:700;color:var(--t1d);letter-spacing:.5px;}
.logo-text em{font-style:normal;font-size:11px;color:var(--t2d);letter-spacing:2px;}
.nav-links{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
}
.nav-links a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:0 16px;
  border-radius:var(--r-pill);
  font-size:15px;
  color:var(--t2d);
  border:1px solid transparent;
}
.nav-links a:hover{color:#fff;background:rgba(108,59,244,.22);}
.nav-links a.is-active{
  color:#fff;
  border-color:rgba(168,85,247,.7);
  background:linear-gradient(120deg,rgba(108,59,244,.28) 0%,rgba(43,217,196,.16) 100%);
}
.nav-cat{font-size:14px;}
.nav-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:0 24px;
  border-radius:var(--r-pill);
  background:var(--grad);
  color:#fff;
  font-size:15px;
  font-weight:600;
  white-space:nowrap;
  box-shadow:0 8px 22px rgba(108,59,244,.38);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),filter .24s var(--ease);
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(108,59,244,.5);filter:brightness(1.06);}
.nav-cta:active{transform:translateY(1px);}
.burger{
  display:none;
  width:44px;height:44px;
  border:1px solid rgba(255,255,255,.22);
  border-radius:var(--r-input);
  background:transparent;
  cursor:pointer;
  position:relative;
  flex-shrink:0;
}
.burger span,
.burger span::before,
.burger span::after{
  position:absolute;
  left:50%;
  width:18px;height:2px;
  background:#fff;
  border-radius:2px;
  transform:translateX(-50%);
  transition:transform .24s var(--ease),opacity .2s var(--ease);
}
.burger span{top:21px;}
.burger span::before{content:"";top:-6px;left:0;transform:none;}
.burger span::after{content:"";top:6px;left:0;transform:none;}
.burger[aria-expanded="true"] span{background:transparent;}
.burger[aria-expanded="true"] span::before{transform:rotate(45deg);top:0;}
.burger[aria-expanded="true"] span::after{transform:rotate(-45deg);top:0;}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  flex-wrap:wrap;
  font-size:14px;
  color:var(--t2);
  padding-top:24px;
}
.breadcrumb a{color:var(--t2);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:#B9B2D6;}
.breadcrumb .current{color:var(--t1);font-weight:600;}

/* ---------- 频道头（紧凑 · 浅区） ---------- */
.chan-head{
  background:var(--surface-2);
  border-bottom:1px solid var(--line);
  position:relative;
  overflow:hidden;
}
.chan-head::before{
  content:"";
  position:absolute;
  right:-160px;top:-180px;
  width:420px;height:420px;
  border-radius:50%;
  background:var(--grad-soft);
  pointer-events:none;
}
.chan-head-inner{
  position:relative;
  padding:22px 0 30px;
}
.chan-head h1{
  font-size:34px;
  font-weight:800;
  margin:18px 0 0;
  max-width:820px;
}
.chan-head h1 .hl{
  background:var(--grad);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.chan-lead{
  margin-top:14px;
  max-width:820px;
  color:var(--t2);
  font-size:16px;
  line-height:1.8;
}
.filter-pills{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:20px;
}
.pill{
  display:inline-flex;
  align-items:center;
  min-height:38px;
  padding:0 18px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--t2);
  font-size:14px;
  cursor:default;
  transition:border-color .24s var(--ease),color .24s var(--ease),background-color .24s var(--ease);
}
.pill:hover{border-color:var(--brand);color:var(--brand);}
.pill.is-on{
  background:var(--grad);
  border-color:transparent;
  color:#fff;
  font-weight:600;
}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;}
.section--surface{background:var(--surface);}
.section--white{background:var(--surface-2);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{
  font-size:34px;
  font-weight:800;
  margin-bottom:14px;
}
.section-head p{color:var(--t2);}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:1px;
  color:var(--brand);
  font-weight:600;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;
  border-radius:2px;
  background:var(--grad);
}

/* ---------- 规格表 ---------- */
.spec-wrap{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:40px;
  align-items:start;
}
.spec-table{
  background:var(--surface-2);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:8px 28px;
  box-shadow:var(--sh-light);
}
.spec-row{
  display:grid;
  grid-template-columns:200px minmax(0,1fr);
  gap:24px;
  align-items:center;
  min-height:56px;
  padding:10px 0;
  border-bottom:1px solid var(--line);
}
.spec-row:last-child{border-bottom:0;}
.spec-term{
  font-weight:600;
  font-size:16px;
  color:var(--t1);
  display:flex;
  align-items:center;
  gap:10px;
}
.spec-term i{
  display:inline-block;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--grad);
  flex-shrink:0;
}
.spec-desc{color:var(--t2);font-size:15.5px;line-height:1.75;}
.spec-aside{
  background:var(--ink);
  border-radius:var(--r-card);
  padding:28px;
  color:var(--t1d);
  position:relative;
  overflow:hidden;
  box-shadow:var(--sh-deep);
}
.spec-aside::before{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.35) 1px,transparent 1.4px),
                   radial-gradient(rgba(255,255,255,.22) 1px,transparent 1.4px);
  background-size:120px 120px,72px 72px;
  background-position:10px 12px,40px 46px;
  opacity:.35;
  pointer-events:none;
}
.spec-aside h3{
  font-size:20px;
  margin-bottom:12px;
  position:relative;
}
.spec-aside p{
  color:var(--t2d);
  font-size:15px;
  position:relative;
}
.aside-list{position:relative;margin-top:18px;display:grid;gap:12px;}
.aside-list li{
  display:flex;
  gap:10px;
  font-size:14.5px;
  color:var(--t2d);
  align-items:flex-start;
}
.aside-list svg{width:18px;height:18px;flex-shrink:0;color:var(--mint);margin-top:4px;}

/* ---------- 窄卡 ---------- */
.narrow-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.narrow-card{
  background:var(--surface-2);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px;
  box-shadow:var(--sh-light);
  transition:transform .26s var(--ease),box-shadow .26s var(--ease),border-color .26s var(--ease);
}
.narrow-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--sh-light-hover);
  border-color:#D6CCF7;
}
.narrow-ico{
  width:48px;height:48px;
  border-radius:var(--r-input);
  background:var(--grad-soft);
  border:1px solid var(--line);
  display:grid;place-items:center;
  color:var(--brand);
  margin-bottom:18px;
}
.narrow-ico svg{width:24px;height:24px;}
.narrow-card h3{font-size:20px;margin-bottom:12px;}
.narrow-card p{color:var(--t2);font-size:15.5px;line-height:1.8;}
.narrow-card p + p{margin-top:10px;}

/* ---------- 深区：数据徽章 + 时间轴 ---------- */
.section--deep{
  background:var(--ink);
  color:var(--t1d);
  position:relative;
  overflow:hidden;
}
.section--deep::before{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.34) 1px,transparent 1.4px),
                   radial-gradient(rgba(255,255,255,.18) 1px,transparent 1.4px);
  background-size:140px 140px,88px 88px;
  background-position:20px 28px,60px 70px;
  opacity:.32;
  pointer-events:none;
}
.section--deep .container{position:relative;}
.section--deep .section-head h2{color:var(--t1d);}
.section--deep .section-head p{color:var(--t2d);}
.section--deep .eyebrow{color:var(--mint);}

.stat-strip{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
  margin-bottom:64px;
}
.stat{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-sm);
  padding:24px 26px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
  transition:transform .26s var(--ease),border-color .26s var(--ease);
}
.stat:hover{transform:translateY(-4px);border-color:rgba(168,85,247,.6);}
.stat b{
  display:block;
  font-size:40px;
  line-height:1.1;
  font-weight:800;
  color:var(--gold);
  font-variant-numeric:tabular-nums;
  letter-spacing:-1px;
}
.stat b small{font-size:16px;font-weight:600;margin-left:4px;color:var(--t2d);}
.stat span{
  display:block;
  margin-top:8px;
  font-size:13px;
  color:var(--t2d);
  line-height:1.7;
}

.tl-wrap{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:56px;
  align-items:center;
}
.tl-figure{
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid rgba(255,255,255,.12);
  box-shadow:var(--sh-deep);
  aspect-ratio:4 / 3;
  background:var(--ink-3);
}
.tl-figure img{width:100%;height:100%;object-fit:cover;}
.timeline{position:relative;}
.tl-item{
  position:relative;
  padding-left:40px;
  padding-bottom:32px;
}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";
  position:absolute;
  left:6px;top:8px;
  width:14px;height:14px;
  border-radius:50%;
  background:var(--grad);
  box-shadow:0 0 0 4px rgba(108,59,244,.22);
}
.tl-item:not(:last-child)::after{
  content:"";
  position:absolute;
  left:12px;top:26px;bottom:6px;
  width:2px;
  background:linear-gradient(180deg,rgba(108,59,244,.9) 0%,rgba(43,217,196,.35) 100%);
}
.tl-item span{
  display:inline-block;
  font-size:12px;
  letter-spacing:1px;
  color:var(--mint);
  font-weight:600;
  margin-bottom:6px;
}
.tl-item h3{font-size:20px;color:var(--t1d);margin-bottom:8px;}
.tl-item p{color:var(--t2d);font-size:15px;line-height:1.8;}

/* ---------- FAQ ---------- */
.faq-list{max-width:880px;}
.faq-item{
  position:relative;
  background:var(--surface-2);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease),background-color .24s var(--ease);
}
.faq-item:hover{border-color:#D6CCF7;}
.faq-item::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:4px;
  background:var(--grad);
  transform:scaleY(0);
  transform-origin:top;
  transition:transform .26s var(--ease);
}
.faq-item[open]{
  background:linear-gradient(120deg,rgba(108,59,244,.045) 0%,rgba(43,217,196,.04) 100%);
  border-color:#DCD2FA;
}
.faq-item[open]::before{transform:scaleY(1);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:20px 60px 20px 26px;
  font-size:17px;
  font-weight:600;
  color:var(--t1);
  position:relative;
  min-height:44px;
  display:flex;
  align-items:center;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  position:absolute;
  right:24px;top:50%;
  transform:translateY(-50%);
  font-size:22px;
  font-weight:400;
  color:var(--brand);
  transition:transform .26s var(--ease);
  line-height:1;
}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg);}
.faq-body{
  padding:0 26px 22px;
  color:var(--t2);
  font-size:15.5px;
  line-height:1.85;
}

/* ---------- 精简 CTA 条 ---------- */
.cta-bar{
  background:var(--grad);
  border-radius:var(--r-lg);
  padding:24px 32px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  color:#fff;
  box-shadow:0 18px 40px rgba(108,59,244,.32);
  position:relative;
  overflow:hidden;
}
.cta-bar::after{
  content:"";
  position:absolute;
  right:-60px;top:-80px;
  width:240px;height:240px;
  border-radius:50%;
  background:rgba(255,255,255,.14);
  pointer-events:none;
}
.cta-bar p{
  font-size:17px;
  font-weight:600;
  position:relative;
}
.cta-bar p small{
  display:block;
  font-size:14px;
  font-weight:400;
  opacity:.88;
  margin-top:4px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 28px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  border:1px solid transparent;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),background-color .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease);
  white-space:nowrap;
}
.btn--light{
  background:#fff;
  color:var(--brand);
  position:relative;
  box-shadow:0 10px 24px rgba(13,10,30,.22);
}
.btn--light:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(13,10,30,.3);}
.btn--light:active{transform:translateY(1px);}
.btn--ghost{
  background:transparent;
  border-color:rgba(255,255,255,.4);
  color:#fff;
}
.btn--ghost:hover{background:rgba(255,255,255,.14);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);
  color:var(--t2d);
  padding:72px 0 0;
  position:relative;
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;right:0;top:0;
  height:1px;
  background:var(--grad);
  opacity:.5;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:14.5px;color:var(--t2d);line-height:1.85;max-width:340px;}
.site-footer h4{
  font-size:15px;
  color:var(--t1d);
  margin-bottom:18px;
  font-weight:600;
}
.site-footer ul li{margin-bottom:10px;}
.site-footer ul a{
  font-size:14.5px;
  color:var(--t2d);
}
.site-footer ul a:hover{color:var(--mint);}
.footer-contact li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:14.5px;
  color:var(--t2d);
}
.footer-contact svg{
  width:18px;height:18px;
  flex-shrink:0;
  color:var(--brand-2);
  margin-top:4px;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0;
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13.5px;
  color:#8F87B5;
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:60;
  display:flex;
  align-items:center;
  gap:10px;
  opacity:0;
  transform:translateY(16px);
  pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease);
}
.float-cta.is-show{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta .btn{box-shadow:0 18px 34px rgba(13,10,30,.36);}
.float-cta .btn--mini{
  background:rgba(23,18,54,.92);
  color:#fff;
  border-color:rgba(255,255,255,.2);
  min-height:44px;
  padding:0 20px;
  font-weight:500;
}
.float-cta .btn--mini:hover{background:var(--ink-3);border-color:rgba(168,85,247,.6);}

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

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .nav-links a{padding:0 12px;font-size:14px;}
  .spec-wrap{grid-template-columns:1fr;}
  .spec-aside{order:-1;}
  .narrow-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat-strip{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
  .tl-wrap{grid-template-columns:1fr;gap:36px;}
  .tl-figure{max-width:640px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  body{font-size:16px;}
  .container{padding:0 20px;}
  .nav{height:64px;}
  .nav-cta{display:none;}
  .burger{display:block;margin-left:auto;}
  .nav-links{
    position:fixed;
    left:0;right:0;top:64px;
    bottom:0;
    margin-left:0;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:24px 20px 120px;
    background:var(--ink);
    overflow-y:auto;
    transform:translateY(-12px);
    opacity:0;
    pointer-events:none;
    transition:opacity .26s var(--ease),transform .26s var(--ease);
    z-index:65;
  }
  .nav-links.is-open{opacity:1;transform:none;pointer-events:auto;}
  .nav-links a{
    min-height:52px;
    padding:0 18px;
    font-size:17px;
    border-radius:var(--r-input);
  }
  .nav-links a.nav-cat{
    border:1px solid rgba(255,255,255,.14);
    background:rgba(255,255,255,.04);
  }
  .nav-links::after{
    content:"免费登录账号";
    margin-top:18px;
    display:flex;
    align-items:center;
    justify-content:center;
    min-height:52px;
    border-radius:var(--r-pill);
    background:var(--grad);
    color:#fff;
    font-weight:600;
    font-size:17px;
  }
  .chan-head h1{font-size:26px;}
  .chan-lead{font-size:15px;}
  .section{padding:56px 0;}
  .section-head h2{font-size:24px;}
  .spec-table{padding:6px 20px;}
  .spec-row{
    grid-template-columns:1fr;
    gap:4px;
    padding:16px 0;
  }
  .spec-term{font-size:15.5px;}
  .narrow-grid{grid-template-columns:1fr;}
  .stat-strip{grid-template-columns:1fr;}
  .stat b{font-size:32px;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-bar{
    flex-direction:column;
    align-items:flex-start;
    padding:24px 22px;
  }
  .cta-bar .btn{width:100%;}
  .faq-item summary{font-size:16px;padding:18px 52px 18px 20px;}
  .faq-body{padding:0 20px 20px;}
  .float-cta{
    left:0;right:0;bottom:0;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    background:rgba(13,10,30,.94);
    border-top:1px solid rgba(255,255,255,.12);
    gap:8px;
  }
  .float-cta .btn{flex:1;min-height:44px;padding:0 12px;font-size:14px;}
  .float-cta .btn--mini{background:transparent;border-color:rgba(255,255,255,.24);}
  .site-footer{padding-top:56px;padding-bottom:80px;}
}
@media (max-width:520px){
  .chan-head h1{font-size:23px;}
  .pill{min-height:34px;padding:0 14px;font-size:13px;}
  .section-head h2{font-size:22px;}
  .cta-bar p{font-size:15.5px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.01ms !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}