/* roulang page: index */
:root{
  --bg-deep:#070B1A;
  --bg-panel:#0E1430;
  --bg-elev:#131A3A;
  --brand:#4E6BFF;
  --brand-2:#35E0D0;
  --accent:#FFB562;
  --ink:#EAF0FF;
  --ink-2:#A9B6D9;
  --ink-3:#6E7BA3;
  --line:rgba(120,150,255,.18);
  --line-strong:rgba(53,224,208,.40);
  --danger:#FF7A7A;
  --r-card:16px;
  --r-glass:18px;
  --r-btn:12px;
  --r-input:10px;
  --shadow-1:0 12px 32px rgba(3,6,20,.55);
  --shadow-2:0 18px 44px rgba(3,6,20,.72);
  --container:1200px;
  --gap-s:16px;
  --gap-m:20px;
  --gap-l:24px;
  --sect:88px;
  --glass:linear-gradient(160deg, rgba(78,107,255,.12), rgba(19,26,58,.62));
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-panel);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--ink);text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease}
a:hover{color:var(--brand-2)}
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{margin:0;font-weight:700;line-height:1.32;letter-spacing:-.01em}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
:focus{outline:none}
a:focus-visible,button:focus-visible,input:focus-visible,.nav-card:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-radius:6px;
}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:999;
  background:var(--brand);color:#fff;padding:10px 16px;border-radius:0 0 12px 0;
}
.skip-link:focus{left:0}

/* 栅格兜底 */
.grid-x{display:flex;flex-wrap:wrap;margin-left:-12px;margin-right:-12px}
.grid-x>.cell{flex:0 0 auto;min-width:0;padding-left:12px;padding-right:12px;width:100%}
.grid-x>.small-12{width:100%}
@media (min-width:640px){
  .grid-x>.medium-5{width:41.6667%}
  .grid-x>.medium-6{width:50%}
  .grid-x>.medium-7{width:58.3333%}
  .grid-x>.medium-12{width:100%}
}
@media (min-width:1024px){
  .grid-x>.large-3{width:25%}
  .grid-x>.large-4{width:33.3333%}
  .grid-x>.large-5{width:41.6667%}
  .grid-x>.large-6{width:50%}
  .grid-x>.large-7{width:58.3333%}
  .grid-x>.large-8{width:66.6667%}
}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media (min-width:1024px){.container{padding:0 32px}}

/* 通用板块 */
.section{padding:56px 0}
@media (min-width:1024px){.section{padding:var(--sect) 0}}
.section--alt{background:linear-gradient(180deg,rgba(19,26,58,.55),rgba(14,20,48,.9));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-end;justify-content:space-between;margin-bottom:32px}
.section-head h2{font-size:clamp(22px,2.6vw,32px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.06em;color:var(--brand-2);
  text-transform:none;margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:1.5px;background:linear-gradient(90deg,var(--brand-2),transparent)}
.lead{color:var(--ink-2);max-width:680px;font-size:15.5px}
.link-more{font-size:14px;color:var(--brand-2);border-bottom:1px solid rgba(53,224,208,.35);padding-bottom:2px}
.link-more:hover{color:#fff;border-color:#fff}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  border:1.5px solid transparent;transition:all .2s ease;white-space:nowrap;
}
.btn--primary{
  background:linear-gradient(135deg,#4E6BFF,#6B4EFF);color:#fff;
  box-shadow:0 8px 24px rgba(78,107,255,.35);
}
.btn--primary:hover{color:#fff;filter:brightness(1.06);box-shadow:0 8px 24px rgba(78,107,255,.4),0 0 26px rgba(53,224,208,.45)}
.btn--primary:active{transform:translateY(1px);box-shadow:0 4px 14px rgba(78,107,255,.35)}
.btn--ghost{background:transparent;border-color:var(--brand);color:var(--ink)}
.btn--ghost:hover{background:rgba(78,107,255,.12);color:#fff;border-color:var(--brand)}
.btn--ghost:active{transform:translateY(1px)}
.btn--sm{padding:9px 18px;font-size:13.5px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;filter:none}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12px;line-height:1.7;
  border:1px solid var(--line);background:rgba(19,26,58,.72);color:var(--ink-2);
}
.badge--accent{border-color:rgba(255,181,98,.4);color:var(--accent);background:rgba(255,181,98,.08)}
.badge--cyan{border-color:rgba(53,224,208,.35);color:var(--brand-2);background:rgba(53,224,208,.07)}

/* 导航 */
.site-header{position:sticky;top:0;z-index:60;padding:12px 0;transition:background-color .25s ease,box-shadow .25s ease}
.site-header::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(180deg,rgba(7,11,26,.92),rgba(7,11,26,.55));
  border-bottom:1px solid rgba(120,150,255,.10);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:opacity .25s ease;opacity:.92;
}
.site-header.is-scrolled::before{opacity:1;background:linear-gradient(180deg,rgba(7,11,26,.98),rgba(7,11,26,.86))}
.nav-panel{
  display:flex;align-items:center;gap:18px;
  min-height:60px;padding:8px 14px;
  border-radius:var(--r-glass);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  position:relative;
}
.nav-panel::after{content:"";position:absolute;left:16px;right:16px;top:0;height:1px;background:linear-gradient(90deg,transparent,rgba(234,240,255,.35),transparent)}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;min-width:0}
.brand__mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(78,107,255,.9),rgba(53,224,208,.55));
  box-shadow:0 6px 18px rgba(78,107,255,.35);
}
.brand__mark svg{width:20px;height:20px;stroke:#fff;fill:none;stroke-width:1.5}
.brand__text{font-size:16px;font-weight:700;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand__text small{display:block;font-size:11px;font-weight:400;color:var(--ink-3);letter-spacing:.08em}
.nav-cards{display:flex;align-items:center;gap:6px;margin-left:auto;flex-wrap:nowrap;overflow:hidden}
.nav-card{
  display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 14px;
  border-radius:var(--r-btn);font-size:13.5px;color:var(--ink-2);
  border:1px solid transparent;position:relative;
}
.nav-card svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.5;flex:0 0 18px}
.nav-card:hover{background:rgba(78,107,255,.12);color:var(--ink);border-color:var(--line)}
.nav-card.is-active{color:var(--ink);background:rgba(78,107,255,.14);border-color:var(--line)}
.nav-card.is-active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:3px;
  background:var(--brand-2);box-shadow:0 0 10px rgba(53,224,208,.7);
}
.nav-cta{margin-left:8px;flex:0 0 auto}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:rgba(19,26,58,.7);margin-left:auto;
}
.nav-toggle svg{width:20px;height:20px;stroke:var(--ink);fill:none;stroke-width:1.5}

/* 首屏 */
.hero{
  position:relative;padding:48px 0 56px;
  background:
    radial-gradient(900px 420px at 78% -10%, rgba(78,107,255,.28), transparent 62%),
    radial-gradient(600px 320px at 8% 12%, rgba(53,224,208,.14), transparent 66%),
    var(--bg-deep);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(234,240,255,.16) 1px,transparent 1px);
  background-size:38px 38px;opacity:.5;
}
.hero__inner{position:relative;z-index:2;row-gap:36px}
@media (min-width:1024px){.hero{padding:72px 0 84px}.hero__inner{align-items:center}}
.hero h1{font-size:clamp(28px,4.2vw,46px);margin-bottom:16px}
.hero__sub{font-size:16.5px;color:var(--brand-2);font-weight:600;margin-bottom:14px}
.hero__desc{color:var(--ink-2);font-size:15.5px;max-width:600px}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 30px}
.hero__stats{display:flex;flex-wrap:wrap;gap:14px}
.hero__stats li{
  flex:1 1 150px;min-width:140px;padding:14px 16px;border-radius:var(--r-card);
  background:rgba(19,26,58,.72);border:1px solid var(--line);
}
.hero__stats strong{display:block;font-size:26px;line-height:1.2;color:var(--accent);font-weight:700}
.hero__stats span{display:block;font-size:12px;color:var(--ink-3);margin-top:4px}
.hero__figure{
  margin:0;border-radius:var(--r-glass);overflow:hidden;position:relative;
  border:1px solid var(--line);
  box-shadow:var(--shadow-1),0 0 46px rgba(78,107,255,.22);
  background:var(--bg-elev);
}
.hero__figure img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero__figure::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,11,26,0),rgba(7,11,26,.55))}
.hero__figure figcaption{
  position:absolute;left:16px;right:16px;bottom:14px;z-index:2;
  font-size:12.5px;color:var(--ink-2);
}

/* 三步上手 */
.steps-wrap{position:relative}
.steps-rail{position:relative;display:grid;grid-template-columns:1fr;gap:0}
.steps-rail::before{
  content:"";position:absolute;left:21px;top:16px;bottom:16px;width:2px;
  background:linear-gradient(180deg,rgba(53,224,208,.7),rgba(53,224,208,0));
}
@media (min-width:900px){
  .steps-rail{grid-template-columns:repeat(3,1fr);gap:var(--gap-l)}
  .steps-rail::before{left:0;right:0;top:24px;bottom:auto;height:2px;width:auto;
    background:linear-gradient(90deg,rgba(53,224,208,.75),rgba(78,107,255,.5),rgba(53,224,208,0));}
}
.step{position:relative;padding:0 0 32px 56px}
@media (min-width:900px){.step{padding:0;text-align:left}}
.step__num{
  position:absolute;left:0;top:-4px;width:44px;height:44px;border-radius:999px;
  display:grid;place-items:center;font-size:14px;font-weight:700;color:#08101F;
  background:linear-gradient(135deg,var(--brand-2),#86f3e8);
  box-shadow:0 0 0 5px rgba(14,20,48,1),0 0 22px rgba(53,224,208,.35);
}
@media (min-width:900px){
  .step__num{position:static;margin-bottom:18px}
}
.step__icon{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  border:1px solid var(--line);background:rgba(78,107,255,.12);margin-bottom:12px;
}
.step__icon svg{width:20px;height:20px;stroke:var(--brand-2);fill:none;stroke-width:1.5}
.step h3{font-size:19px;margin-bottom:8px}
.step p{color:var(--ink-2);font-size:14.8px}

/* 参数面板 */
.metrics{border-radius:var(--r-glass);border:1px solid var(--line);background:var(--bg-elev);overflow:hidden}
.metrics .grid-x{margin:0}
.metrics .cell{padding:24px 22px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.metrics strong{display:block;font-size:28px;color:var(--accent);line-height:1.25;font-weight:700}
.metrics small{display:block;font-size:12px;color:var(--ink-3);margin-top:6px}
.metrics p{font-size:13.8px;color:var(--ink-2);margin-top:12px}
.metrics ul{margin-top:12px}
.metrics li{position:relative;padding-left:16px;font-size:13.8px;color:var(--ink-2)}
.metrics li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:2px;background:var(--brand-2);transform:rotate(45deg)}

/* 案例证明 */
.case{display:flex;flex-wrap:wrap;gap:28px;align-items:center;padding-bottom:32px;margin-bottom:32px;border-bottom:1px solid var(--line)}
.case:last-child{border-bottom:0;padding-bottom:0;margin-bottom:0}
.case__media{flex:1 1 340px;min-width:280px;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);position:relative}
@media (min-width:900px){.case--reverse .case__media{order:2}}
.case__media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.case__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,11,26,.05),rgba(7,11,26,.5))}
.case__body{flex:1 1 300px;min-width:260px}
.case__body h3{font-size:20px;margin:12px 0 10px}
.case__body p{color:var(--ink-2);font-size:15px}
.case__kpis{display:flex;flex-wrap:wrap;gap:20px;margin:16px 0}
.case__kpis div strong{display:block;font-size:22px;color:var(--accent);font-weight:700}
.case__kpis div span{font-size:12px;color:var(--ink-3)}
.quote{
  border-left:3px solid rgba(53,224,208,.6);padding:8px 0 8px 14px;
  font-size:14.5px;color:var(--ink-2);margin:14px 0;
}

/* 内容卡片 */
.posts-grid{margin-top:0}
.post-card{
  height:100%;display:flex;flex-direction:column;
  border-radius:var(--r-glass);overflow:hidden;position:relative;
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--shadow-1);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  margin-bottom:24px;
}
.post-card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow-2),0 0 24px rgba(53,224,208,.18)}
.post-card__media{position:relative}
.post-card__media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.post-card__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,11,26,0),rgba(7,11,26,.65))}
.post-card__tag{position:absolute;left:12px;top:12px;z-index:2}
.post-card__body{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1 1 auto}
.post-card__title{font-size:17px;line-height:1.55;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card__desc{font-size:14px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:14px}
.post-card__meta{display:flex;align-items:center;gap:7px;font-size:12.5px;color:var(--ink-3);margin-top:auto}
.post-card__meta svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:1.5}
.post-card__link{display:block;color:inherit}
.post-card__link:hover .post-card__title{color:var(--brand-2)}
.empty-state{
  text-align:center;padding:52px 24px;border-radius:var(--r-glass);
  border:1px dashed var(--line);background:rgba(19,26,58,.5);
}
.empty-state svg{width:34px;height:34px;stroke:var(--ink-3);fill:none;stroke-width:1.5;margin:0 auto 14px}
.empty-state p{color:var(--ink-2);font-size:15px;margin-bottom:18px}

/* FAQ */
.faq-list{display:grid;gap:14px}
.faq-item{
  border-radius:var(--r-glass);border:1px solid var(--line);
  background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item.is-open{border-color:var(--line-strong);box-shadow:0 0 24px rgba(53,224,208,.14)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;text-align:left;
  padding:18px 20px;font-size:16px;font-weight:600;color:var(--ink);
}
.faq-q__num{
  flex:0 0 28px;width:28px;height:28px;border-radius:999px;display:grid;place-items:center;
  font-size:12.5px;color:var(--brand-2);border:1px solid rgba(53,224,208,.4);background:rgba(53,224,208,.08);
}
.faq-q__text{flex:1 1 auto}
.faq-q__sign{flex:0 0 20px;position:relative;width:20px;height:20px;transition:transform .2s ease}
.faq-q__sign::before,.faq-q__sign::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-2);border-radius:2px;transform:translate(-50%,-50%);
}
.faq-q__sign::before{width:14px;height:2px}
.faq-q__sign::after{width:2px;height:14px;transition:opacity .2s ease,transform .2s ease}
.faq-item.is-open .faq-q__sign::after{opacity:0;transform:translate(-50%,-50%) rotate(90deg)}
.faq-a{padding:0 20px 20px 62px;font-size:15px;line-height:1.85;color:var(--ink-2);display:none}
.faq-item.is-open .faq-a{display:block}
@media (max-width:640px){.faq-a{padding-left:20px}}

/* CTA */
.cta{
  position:relative;padding:56px 0;
  background:
    radial-gradient(700px 340px at 20% 0%, rgba(78,107,255,.3), transparent 64%),
    radial-gradient(520px 300px at 88% 100%, rgba(53,224,208,.16), transparent 68%),
    var(--bg-deep);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);overflow:hidden;
}
.cta::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.45;
  background-image:radial-gradient(rgba(234,240,255,.16) 1px,transparent 1px);background-size:34px 34px;
}
@media (min-width:1024px){.cta{padding:76px 0}}
.cta__inner{position:relative;z-index:2;row-gap:30px;align-items:center}
.cta h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:12px}
.cta p{color:var(--ink-2);font-size:15px}
.cta__card{
  border-radius:var(--r-glass);padding:24px;
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-1);
}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;color:var(--ink-2);margin-bottom:8px}
.field input{
  width:100%;padding:13px 14px;border-radius:var(--r-input);
  background:rgba(7,11,26,.72);border:1px solid var(--line);color:var(--ink);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field input::placeholder{color:var(--ink-3)}
.field input:focus{border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(53,224,208,.14);outline:none}
.field input.is-error{border-color:var(--danger);box-shadow:0 0 0 3px rgba(255,122,122,.12)}
.form-hint{font-size:12px;color:var(--ink-3);margin-top:10px}
.form-hint.is-error{color:var(--danger)}
.form-hint.is-success{color:var(--brand-2);background:rgba(53,224,208,.1);border:1px solid rgba(53,224,208,.35);border-radius:10px;padding:9px 12px}

/* 页脚 */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:52px 0 24px}
.footer-grid{row-gap:28px}
.footer-brand p{font-size:13.8px;color:var(--ink-3);max-width:300px;margin-top:14px}
.footer-col h4{font-size:14px;color:var(--ink);margin-bottom:14px;letter-spacing:.02em}
.footer-col li{margin-bottom:9px}
.footer-col a{font-size:13.8px;color:var(--ink-2)}
.footer-col a:hover{color:var(--brand-2)}
.footer-bottom{
  margin-top:36px;padding-top:18px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:12.5px;color:var(--ink-3);
}

/* 移动端 */
.mobile-cta{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom,0px));
  background:linear-gradient(180deg,rgba(7,11,26,.7),rgba(7,11,26,.98));
  border-top:1px solid var(--line);backdrop-filter:blur(12px);
}
.mobile-cta .btn{width:100%}
@media (max-width:900px){
  .nav-cards{
    position:absolute;left:0;right:0;top:calc(100% + 10px);
    display:grid;grid-template-columns:repeat(2,1fr);gap:10px;
    padding:16px;border-radius:var(--r-glass);
    background:linear-gradient(160deg,rgba(19,26,58,.98),rgba(7,11,26,.98));
    border:1px solid var(--line);box-shadow:var(--shadow-2);
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
    margin-left:0;
  }
  .nav-cards.is-open{opacity:1;visibility:visible;transform:none}
  .nav-card{height:52px;border:1px solid var(--line);background:rgba(19,26,58,.66);justify-content:flex-start}
  .nav-card.is-active::before{top:12px;bottom:12px}
  .nav-toggle{display:inline-flex}
  .nav-cta{display:none}
  .mobile-cta{display:block}
  body{padding-bottom:72px}
}
@media (max-width:640px){
  body{font-size:15px;line-height:1.9}
  .section{padding:56px 0}
  .hero__stats li{flex:1 1 100%}
  .case__kpis{gap:14px}
  .brand__text small{display:none}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: article */
:root{
  --bg-deep:#070B1A;
  --bg-panel:#0E1430;
  --bg-elev:#131A3A;
  --brand:#4E6BFF;
  --brand-2:#35E0D0;
  --accent:#FFB562;
  --ink:#EAF0FF;
  --ink-2:#A9B6D9;
  --ink-3:#6E7BA3;
  --line:rgba(120,150,255,.18);
  --line-strong:rgba(120,150,255,.34);
  --r-card:16px;
  --r-glass:18px;
  --r-btn:12px;
  --r-input:10px;
  --r-pill:999px;
  --shadow-1:0 12px 32px rgba(3,6,20,.55);
  --shadow-2:0 18px 44px rgba(3,6,20,.72);
  --glow-soft:0 0 24px rgba(53,224,208,.18);
  --container:1200px;
  --sec-y:88px;
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
  --font-num:"DIN Alternate","Oswald","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:
    radial-gradient(1200px 620px at 12% -8%, rgba(78,107,255,.16), transparent 62%),
    radial-gradient(900px 520px at 92% 4%, rgba(53,224,208,.10), transparent 60%),
    var(--bg-panel);
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--ink);text-decoration:none;background-color:transparent;transition:color .2s ease,border-color .2s ease,opacity .2s ease;}
a:hover{color:var(--brand-2);}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
input{font-family:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
@media (min-width:1024px){.container{padding:0 32px;}}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:linear-gradient(180deg, rgba(7,11,26,.94), rgba(7,11,26,.70));
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{background:rgba(7,11,26,.98);box-shadow:0 10px 30px rgba(3,6,20,.6);}
.nav-panel{
  display:flex;align-items:center;gap:18px;
  min-height:76px;padding:10px 0;
}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand__mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg, rgba(78,107,255,.9), rgba(53,224,208,.75));
  box-shadow:0 8px 20px rgba(78,107,255,.35);
  flex:0 0 auto;
}
.brand__mark svg{width:22px;height:22px;fill:#fff;stroke:none;}
.brand__text{display:flex;flex-direction:column;font-weight:700;font-size:16px;line-height:1.25;letter-spacing:-.01em;color:var(--ink);}
.brand__text small{font-weight:400;font-size:11px;color:var(--ink-3);letter-spacing:0;margin-top:2px;}
.nav-cards{display:flex;align-items:center;gap:8px;margin:0 0 0 auto;}
.nav-card{
  display:flex;align-items:center;gap:8px;
  height:46px;padding:0 14px;border-radius:var(--r-btn);
  border:1px solid transparent;
  color:var(--ink-2);font-size:14px;white-space:nowrap;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.nav-card svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;flex:0 0 auto;}
.nav-card:hover{background:rgba(78,107,255,.14);color:var(--ink);border-color:var(--line);}
.nav-card.is-active{
  color:#fff;
  background:linear-gradient(90deg, rgba(53,224,208,.16), rgba(78,107,255,.10));
  border-color:rgba(53,224,208,.34);
  box-shadow:inset 3px 0 0 var(--brand-2);
}
.nav-toggle{
  display:none;width:46px;height:46px;border-radius:12px;
  background:rgba(19,26,58,.9);border:1px solid var(--line);color:var(--ink);
  align-items:center;justify-content:center;
}
.nav-toggle svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;letter-spacing:.01em;
  border:1.5px solid transparent;text-align:center;
  transition:box-shadow .22s ease,transform .18s ease,background .22s ease,color .22s ease,border-color .22s ease;
}
.btn svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.btn--primary{
  color:#fff;
  background:linear-gradient(135deg,#4E6BFF,#6B4EFF);
  box-shadow:0 8px 24px rgba(78,107,255,.35);
}
.btn--primary:hover{color:#fff;filter:brightness(1.06);box-shadow:0 8px 24px rgba(78,107,255,.42),0 0 26px rgba(53,224,208,.45);transform:translateY(-2px);}
.btn--primary:active{transform:translateY(-1px);}
.btn--ghost{
  color:var(--ink);background:transparent;border-color:rgba(78,107,255,.75);
}
.btn--ghost:hover{color:#fff;background:rgba(78,107,255,.12);transform:translateY(-2px);}
.btn--sm{padding:11px 18px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none;}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:12px;line-height:1.6;letter-spacing:.02em;
  border:1px solid var(--line);color:var(--ink-2);background:rgba(19,26,58,.7);
}
.badge--brand{color:var(--brand-2);border-color:rgba(53,224,208,.36);background:rgba(53,224,208,.10);}
.badge--accent{color:var(--accent);border-color:rgba(255,181,98,.36);background:rgba(255,181,98,.10);}

/* ---------- 文章头部 ---------- */
.post-hero{
  position:relative;
  padding:34px 0 40px;
  background:
    radial-gradient(760px 340px at 16% -30%, rgba(78,107,255,.24), transparent 66%),
    radial-gradient(620px 300px at 88% -10%, rgba(53,224,208,.14), transparent 62%),
    linear-gradient(180deg, var(--bg-deep), rgba(14,20,48,.35));
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.post-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(234,240,255,.14) 1px, transparent 1px);
  background-size:34px 34px;opacity:.35;
}
.post-hero .container{position:relative;z-index:1;}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12px;color:var(--ink-3);margin-bottom:18px;
}
.breadcrumb a{color:var(--ink-2);}
.breadcrumb a:hover{color:var(--brand-2);}
.breadcrumb span.sep{color:var(--ink-3);opacity:.8;}
.breadcrumb .current{color:var(--ink-2);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.post-hero h1{
  font-size:clamp(26px,3.6vw,40px);
  font-weight:700;letter-spacing:-.01em;line-height:1.3;
  margin:16px 0 18px;max-width:900px;
}
.post-meta{display:flex;flex-wrap:wrap;gap:10px 20px;align-items:center;font-size:13px;color:var(--ink-3);}
.post-meta .item{display:inline-flex;align-items:center;gap:7px;}
.post-meta svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}

/* ---------- 主体 ---------- */
.main-body{padding:48px 0 72px;}
.cover-figure{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-1);
  margin-bottom:40px;background:var(--bg-elev);
}
.cover-figure img{width:100%;aspect-ratio:21/9;object-fit:cover;}
.cover-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:26px 20px 12px;font-size:12px;color:var(--ink-2);
  background:linear-gradient(180deg, rgba(7,11,26,0), rgba(7,11,26,.86));
}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:32px;align-items:start;}
@media (max-width:1023px){.layout{grid-template-columns:minmax(0,1fr);}}
.reading{
  max-width:760px;
  background:linear-gradient(180deg, rgba(19,26,58,.72), rgba(14,20,48,.86));
  border:1px solid var(--line);border-radius:var(--r-card);
  padding:34px 30px;box-shadow:var(--shadow-1);
}
@media (max-width:640px){.reading{padding:24px 18px;}}

/* ---------- 正文排版 ---------- */
.prose{font-size:16px;line-height:1.9;color:var(--ink-2);}
.prose p{margin:0 0 1.2em;color:var(--ink-2);}
.prose h2{
  position:relative;
  font-size:clamp(20px,2.2vw,26px);font-weight:700;color:var(--ink);
  letter-spacing:-.01em;line-height:1.45;
  margin:2em 0 .9em;padding-left:16px;
}
.prose h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;border-radius:2px;
  background:linear-gradient(180deg,var(--brand-2),rgba(53,224,208,.15));
  box-shadow:0 0 12px rgba(53,224,208,.55);
}
.prose h3{font-size:18px;font-weight:600;color:var(--ink);margin:1.6em 0 .7em;line-height:1.6;}
.prose h2:first-child,.prose h3:first-child{margin-top:0;}
.prose strong{color:var(--ink);font-weight:600;}
.prose a{color:var(--brand-2);border-bottom:1px solid rgba(53,224,208,.35);}
.prose a:hover{color:#fff;border-bottom-color:#fff;}
.prose ul,.prose ol{margin:0 0 1.3em;padding-left:2px;}
.prose ul li,.prose ol li{position:relative;padding-left:20px;margin-bottom:.6em;color:var(--ink-2);}
.prose ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;
  background:var(--brand-2);transform:rotate(45deg);border-radius:1px;
  box-shadow:0 0 8px rgba(53,224,208,.55);
}
.prose ol{counter-reset:pl;}
.prose ol li{counter-increment:pl;padding-left:26px;}
.prose ol li::before{
  content:counter(pl);position:absolute;left:0;top:.28em;
  font-family:var(--font-num);font-size:12px;font-weight:700;color:var(--accent);
}
.prose blockquote{
  margin:1.6em 0;padding:18px 22px;border-left:3px solid var(--brand-2);
  border-radius:0 12px 12px 0;
  background:linear-gradient(160deg, rgba(78,107,255,.12), rgba(19,26,58,.62));
  border-top:1px solid var(--line);border-right:1px solid var(--line);border-bottom:1px solid var(--line);
  color:var(--ink);
}
.prose blockquote p:last-child{margin-bottom:0;}
.prose img{border-radius:12px;margin:1.4em 0;border:1px solid var(--line);}
.prose figure{margin:1.6em 0;}
.prose figcaption{font-size:12px;color:var(--ink-3);margin-top:8px;text-align:center;}
.prose table{
  width:100%;border-collapse:collapse;margin:1.6em 0;
  font-size:14px;border-top:2px solid var(--brand);
  border-radius:0 0 10px 10px;overflow:hidden;display:table;
}
.prose table thead th{
  background:rgba(78,107,255,.16);color:var(--ink);
  text-align:left;padding:12px 14px;font-weight:600;border-bottom:1px solid var(--line);
}
.prose table td{padding:11px 14px;border-bottom:1px solid var(--line);color:var(--ink-2);}
.prose table tbody tr:nth-child(odd){background:rgba(19,26,58,.55);}
.prose table tbody tr:nth-child(even){background:rgba(14,20,48,.45);}
.prose table tbody tr:hover{background:rgba(78,107,255,.12);}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:1.6em 0;}
.table-scroll table{margin:0;min-width:520px;}

/* ---------- 空态 ---------- */
.empty-state{
  text-align:center;padding:56px 24px;border:1px dashed var(--line-strong);
  border-radius:var(--r-card);background:rgba(19,26,58,.55);
}
.empty-state svg{width:44px;height:44px;fill:none;stroke:var(--ink-3);stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;margin:0 auto 16px;}
.empty-state h2{font-size:20px;color:var(--ink);font-weight:600;margin-bottom:8px;}
.empty-state p{font-size:14px;color:var(--ink-3);margin-bottom:22px;}

/* ---------- 侧栏 ---------- */
.side{display:flex;flex-direction:column;gap:20px;}
.side-card{
  border:1px solid var(--line);border-radius:var(--r-card);
  background:linear-gradient(160deg, rgba(78,107,255,.12), rgba(19,26,58,.62));
  padding:20px;
  box-shadow:var(--shadow-1);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.side-card h3{
  font-size:15px;font-weight:600;color:var(--ink);margin-bottom:14px;
  display:flex;align-items:center;gap:8px;
}
.side-card h3 svg{width:20px;height:20px;fill:none;stroke:var(--brand-2);stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.side-card li{font-size:13px;color:var(--ink-2);padding:9px 0;border-bottom:1px dashed var(--line);}
.side-card li:last-child{border-bottom:none;padding-bottom:0;}
.side-card li a{color:var(--ink-2);}
.side-card li a:hover{color:var(--brand-2);}
.side-card.is-note li{display:flex;gap:8px;align-items:flex-start;}
.side-card.is-note li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-2);margin-top:.6em;flex:0 0 auto;}

/* ---------- 相关推荐 ---------- */
.related{padding:72px 0 20px;border-top:1px solid var(--line);margin-top:72px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px;}
.section-head h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;letter-spacing:-.01em;color:var(--ink);}
.section-head p{font-size:13px;color:var(--ink-3);margin-top:6px;}
.text-link{font-size:13px;color:var(--brand-2);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.text-link svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
@media (max-width:1023px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}}
@media (max-width:640px){.card-grid{grid-template-columns:minmax(0,1fr);gap:16px;}}
.card{
  display:flex;flex-direction:column;
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  background:linear-gradient(160deg, rgba(78,107,255,.10), rgba(19,26,58,.68));
  box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-2px);border-color:rgba(53,224,208,.4);box-shadow:var(--shadow-2),var(--glow-soft);}
.card__media{position:relative;overflow:hidden;}
.card__media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s ease;}
.card:hover .card__media img{transform:scale(1.04);}
.card__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg, rgba(7,11,26,.05), rgba(7,11,26,.6));}
.card__body{padding:18px;display:flex;flex-direction:column;gap:12px;flex:1;}
.card__title{font-size:16px;font-weight:600;line-height:1.5;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card__desc{font-size:13px;line-height:1.8;color:var(--ink-3);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.card__foot{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12px;color:var(--ink-3);margin-top:auto;}
.card__foot .meta{display:inline-flex;align-items:center;gap:6px;}
.card__foot svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}

/* ---------- 返回 ---------- */
.back-row{display:flex;flex-wrap:wrap;gap:14px 28px;align-items:center;padding:36px 0 0;}
.back-row .text-link{font-size:14px;}
@media (max-width:640px){.back-row{gap:12px;}}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;overflow:hidden;margin-top:64px;
  border:1px solid var(--line);border-radius:var(--r-glass);
  background:
    radial-gradient(620px 260px at 12% 0%, rgba(78,107,255,.28), transparent 62%),
    radial-gradient(520px 240px at 88% 100%, rgba(53,224,208,.18), transparent 60%),
    linear-gradient(160deg, rgba(78,107,255,.12), rgba(19,26,58,.72));
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  padding:34px 30px;
  display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between;
  box-shadow:var(--shadow-1);
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(234,240,255,.12) 1px, transparent 1px);
  background-size:30px 30px;opacity:.4;
}
.cta-band > *{position:relative;z-index:1;}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;color:var(--ink);letter-spacing:-.01em;}
.cta-band p{font-size:14px;color:var(--ink-2);margin-top:8px;max-width:520px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
@media (max-width:640px){.cta-band{padding:26px 20px;}.cta-actions{width:100%;}.cta-actions .btn{flex:1 1 auto;}}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:88px;padding:64px 0 28px;
  background:linear-gradient(180deg, rgba(7,11,26,.85), var(--bg-deep));
  border-top:1px solid var(--line);
}
.footer-grid{gap:32px 0;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:13px;line-height:1.9;color:var(--ink-3);max-width:320px;}
.footer-col h4{font-size:14px;font-weight:600;color:var(--ink);margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col li{font-size:13px;color:var(--ink-3);}
.footer-col a{color:var(--ink-3);}
.footer-col a:hover{color:var(--brand-2);}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:12px;color:var(--ink-3);
}

/* ---------- 移动端导航 ---------- */
@media (max-width:899px){
  .nav-toggle{display:flex;margin-left:auto;}
  .nav-cta{display:none;}
  .nav-cards{
    position:absolute;left:0;right:0;top:100%;
    display:none;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;
    margin:0;padding:18px 20px 22px;
    background:rgba(9,14,34,.99);
    border-bottom:1px solid var(--line);
    box-shadow:0 24px 50px rgba(3,6,20,.7);
  }
  .nav-cards.is-open{display:grid;}
  .nav-card{height:auto;min-height:52px;justify-content:flex-start;padding:12px 14px;background:rgba(19,26,58,.7);border-color:var(--line);}
  .nav-card span{display:inline;}
}
@media (max-width:640px){
  body{font-size:15px;line-height:1.9;}
  .post-hero{padding:26px 0 32px;}
  .brand__text small{display:none;}
  .brand__text{font-size:15px;}
  .main-body{padding:32px 0 48px;}
  .reading{padding:22px 16px;}
  .card__body{padding:16px;}
  .related{padding:48px 0 10px;margin-top:48px;}
  .site-footer{margin-top:56px;padding:44px 0 24px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category1 */
:root{
  --bg-deep:#070B1A;
  --bg-body:#080D1E;
  --bg-panel:#0E1430;
  --bg-elev:#131A3A;
  --brand:#4E6BFF;
  --brand-2:#35E0D0;
  --accent:#FFB562;
  --ink:#EAF0FF;
  --ink-2:#A9B6D9;
  --ink-3:#6E7BA3;
  --line:rgba(120,150,255,.18);
  --line-strong:rgba(120,150,255,.34);
  --danger:#FF6B6B;
  --r-card:16px;
  --r-glass:18px;
  --r-btn:12px;
  --r-input:10px;
  --r-pill:999px;
  --shadow-1:0 12px 32px rgba(3,6,20,.55);
  --shadow-2:0 18px 44px rgba(3,6,20,.72);
  --glow-card:0 0 24px rgba(53,224,208,.18);
  --glow-btn:0 0 26px rgba(53,224,208,.45);
  --container:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:
    radial-gradient(1100px 520px at 15% -8%, rgba(78,107,255,.16), transparent 62%),
    radial-gradient(900px 480px at 92% 4%, rgba(53,224,208,.08), transparent 60%),
    var(--bg-body);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--ink-2);text-decoration:none;transition:color .25s var(--ease);}
a:hover{color:var(--brand-2);}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;color:var(--ink);font-weight:700;line-height:1.35;}
h1{font-size:clamp(28px,4.2vw,46px);}
h2{font-size:clamp(22px,2.6vw,32px);}
h3{font-size:19px;font-weight:600;}
p{margin:0 0 1em;color:var(--ink-2);}
ul,ol{margin:0;padding:0;list-style:none;}
svg{display:block;}
::selection{background:rgba(78,107,255,.4);color:#fff;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  padding:12px 0;
  background:linear-gradient(180deg, rgba(7,11,26,.92), rgba(7,11,26,.55));
  backdrop-filter:blur(10px);
  transition:background .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.is-scrolled{
  background:linear-gradient(180deg, rgba(7,11,26,.98), rgba(7,11,26,.86));
  box-shadow:0 10px 30px rgba(3,6,20,.65);
  border-bottom:1px solid var(--line);
}
.nav-panel{
  display:flex;align-items:center;gap:16px;
  padding:10px 14px;
  border-radius:var(--r-glass);
  border:1px solid var(--line);
  background:linear-gradient(160deg, rgba(78,107,255,.12), rgba(19,26,58,.62));
  backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06), var(--shadow-1);
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink);}
.brand__mark{
  width:38px;height:38px;flex:0 0 auto;
  display:grid;place-items:center;
  border-radius:12px;
  background:linear-gradient(135deg, rgba(78,107,255,.9), rgba(107,78,255,.7));
  box-shadow:0 8px 20px rgba(78,107,255,.35);
}
.brand__mark svg{width:22px;height:22px;fill:#fff;stroke:none;}
.brand__text{display:flex;flex-direction:column;font-size:15px;font-weight:700;line-height:1.25;letter-spacing:-.01em;white-space:nowrap;}
.brand__text small{font-size:11px;font-weight:400;color:var(--ink-3);letter-spacing:0;}
.nav-cards{display:flex;align-items:center;gap:8px;margin:0 0 0 auto;flex-wrap:wrap;}
.nav-card{
  display:inline-flex;align-items:center;gap:8px;
  min-height:46px;padding:0 14px;
  border-radius:12px;
  border:1px solid transparent;
  color:var(--ink-2);font-size:14px;font-weight:500;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease);
}
.nav-card svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;flex:0 0 auto;}
.nav-card:hover{background:rgba(78,107,255,.12);border-color:var(--line);color:var(--ink);transform:translateY(-1px);}
.nav-card.is-active{
  color:var(--ink);
  background:rgba(53,224,208,.08);
  border-color:rgba(53,224,208,.28);
  box-shadow:inset 3px 0 0 var(--brand-2);
}
.nav-card.is-active svg{color:var(--brand-2);}
.nav-toggle{
  display:none;width:46px;height:46px;margin-left:auto;
  border-radius:12px;border:1px solid var(--line);
  background:rgba(19,26,58,.7);color:var(--ink);cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:none;cursor:pointer;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 24px;
  transition:transform .2s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease),color .25s var(--ease),filter .25s var(--ease);
}
.btn--primary{
  color:#fff;
  background:linear-gradient(135deg,#4E6BFF,#6B4EFF);
  box-shadow:0 8px 24px rgba(78,107,255,.35);
}
.btn--primary:hover{filter:brightness(1.06);box-shadow:0 8px 24px rgba(78,107,255,.42),var(--glow-btn);color:#fff;transform:translateY(-1px);}
.btn--primary:active{transform:translateY(1px);}
.btn--ghost{
  color:var(--ink);
  background:transparent;
  border:1.5px solid var(--brand);
}
.btn--ghost:hover{background:rgba(78,107,255,.12);color:var(--ink);box-shadow:0 0 20px rgba(78,107,255,.28);}
.btn--sm{padding:11px 18px;font-size:14px;border-radius:10px;}
.btn--block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;filter:none;transform:none;}
.nav-cta{flex:0 0 auto;white-space:nowrap;}

/* ============ 头图 ============ */
.banner{position:relative;margin-top:6px;overflow:hidden;}
.banner__media{
  position:relative;height:240px;border-radius:22px;overflow:hidden;
  border:1px solid var(--line);
  background:
    linear-gradient(100deg, rgba(7,11,26,.94) 12%, rgba(7,11,26,.55) 62%, rgba(7,11,26,.35) 100%),
    url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  box-shadow:var(--shadow-1);
}
.banner__media::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(2px 2px at 18% 34%, rgba(234,240,255,.5), transparent 60%),
             radial-gradient(1.6px 1.6px at 62% 22%, rgba(53,224,208,.55), transparent 60%),
             radial-gradient(1.6px 1.6px at 84% 68%, rgba(255,181,98,.45), transparent 60%),
             radial-gradient(1.4px 1.4px at 38% 78%, rgba(234,240,255,.35), transparent 60%);
  pointer-events:none;
}
.banner__inner{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;padding:0 clamp(20px,4vw,44px);}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:14px;flex-wrap:wrap;}
.breadcrumb a{color:var(--ink-3);}
.breadcrumb a:hover{color:var(--brand-2);}
.breadcrumb span.sep{font-size:12px;color:rgba(110,123,163,.7);}
.banner h1{max-width:18em;text-wrap:balance;}
.banner__lead{margin:12px 0 0;max-width:44em;color:var(--ink-2);font-size:15px;}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:12px;color:var(--ink-2);
  border:1px solid var(--line);
  background:rgba(19,26,58,.55);
}
.badge--accent{color:var(--accent);border-color:rgba(255,181,98,.35);background:rgba(255,181,98,.08);}
.badge--cyan{color:var(--brand-2);border-color:rgba(53,224,208,.32);background:rgba(53,224,208,.08);}

/* ============ 板块 ============ */
.section{padding:64px 0;}
.section--tight{padding:40px 0 56px;}
.section__head{max-width:64em;margin-bottom:32px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.08em;color:var(--brand-2);margin-bottom:12px;}
.eyebrow::before{content:"";width:22px;height:2px;background:linear-gradient(90deg,var(--brand-2),transparent);border-radius:2px;}
.section__head p{margin:12px 0 0;font-size:15px;}
.divider{height:1px;background:linear-gradient(90deg,transparent,var(--line-strong),transparent);border:0;margin:0;}

/* 左右图文 */
.split{display:grid;grid-template-columns:1.02fr .98fr;gap:40px;align-items:center;}
.split + .split{margin-top:56px;}
.split--reverse .split__media{order:2;}
.split__media{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-1);}
.split__media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.split__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,11,26,.05) 40%,rgba(7,11,26,.7));pointer-events:none;}
.split__media figcaption{position:absolute;left:16px;bottom:14px;font-size:12px;color:var(--ink-2);z-index:2;}
.split__body h2{margin-bottom:14px;}
.split__body p{margin-bottom:1.1em;}
.check-list{margin-top:18px;display:grid;gap:10px;}
.check-list li{position:relative;padding-left:22px;color:var(--ink-2);font-size:15px;}
.check-list li::before{
  content:"";position:absolute;left:2px;top:.72em;
  width:8px;height:8px;background:var(--brand-2);
  transform:rotate(45deg);border-radius:2px;
  box-shadow:0 0 10px rgba(53,224,208,.55);
}
.check-list li strong{color:var(--ink);font-weight:600;}

/* 编号要点 */
.num-list{display:grid;gap:14px;margin-top:20px;}
.num-list li{
  position:relative;padding:16px 18px 16px 58px;
  border:1px solid var(--line);border-radius:var(--r-card);
  background:linear-gradient(150deg,rgba(19,26,58,.85),rgba(14,20,48,.7));
  color:var(--ink-2);font-size:15px;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease),transform .25s var(--ease);
}
.num-list li:hover{border-color:rgba(53,224,208,.4);box-shadow:var(--glow-card);transform:translateY(-2px);}
.num-list li::before{
  counter-increment:step;
  content:"0" counter(step);
  position:absolute;left:16px;top:15px;
  width:30px;height:30px;border-radius:50%;
  display:grid;place-items:center;
  font-size:12px;font-weight:700;color:var(--brand-2);
  border:1px solid rgba(53,224,208,.4);
  background:rgba(53,224,208,.07);
}
.num-list{counter-reset:step;}
.num-list li strong{color:var(--ink);}

/* 要点面板双列 */
.panel-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:8px;}
.panel{
  padding:24px;border-radius:var(--r-card);
  border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(19,26,58,.9),rgba(14,20,48,.78));
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease),transform .25s var(--ease);
}
.panel:hover{border-color:rgba(53,224,208,.38);box-shadow:var(--glow-card);transform:translateY(-2px);}
.panel__icon{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:rgba(78,107,255,.16);border:1px solid var(--line);margin-bottom:16px;
}
.panel__icon svg{width:20px;height:20px;fill:none;stroke:var(--brand-2);stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.panel h3{margin-bottom:12px;}
.panel p{font-size:15px;margin-bottom:14px;}
.panel .check-list li{font-size:14px;}

/* ============ FAQ ============ */
.faq{display:grid;gap:12px;max-width:920px;}
.faq-item{
  border-radius:var(--r-glass);
  border:1px solid var(--line);
  background:linear-gradient(160deg, rgba(78,107,255,.12), rgba(19,26,58,.62));
  backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  overflow:hidden;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.faq-item.is-open{border-color:rgba(53,224,208,.4);box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--glow-card);}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;
  padding:18px 20px;background:transparent;border:0;cursor:pointer;text-align:left;
  color:var(--ink);font-size:16px;font-weight:600;font-family:inherit;line-height:1.5;
}
.faq-q .idx{font-size:12px;color:var(--brand-2);border:1px solid rgba(53,224,208,.35);border-radius:var(--r-pill);padding:2px 9px;flex:0 0 auto;}
.faq-q .qtext{flex:1 1 auto;}
.faq-q .sign{position:relative;width:18px;height:18px;flex:0 0 auto;transition:transform .2s var(--ease);}
.faq-q .sign::before,.faq-q .sign::after{content:"";position:absolute;background:var(--ink-2);border-radius:2px;}
.faq-q .sign::before{left:0;top:8px;width:18px;height:2px;}
.faq-q .sign::after{left:8px;top:0;width:2px;height:18px;transition:opacity .2s var(--ease);}
.faq-item.is-open .faq-q .sign::after{opacity:0;}
.faq-item.is-open .faq-q .sign{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease);}
.faq-a__inner{padding:0 20px 20px 20px;font-size:15px;line-height:1.85;color:var(--ink-2);}
.faq-a__inner p{margin:0;font-size:15px;}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;overflow:hidden;
  padding:56px 0;
  background:
    radial-gradient(760px 320px at 12% 10%, rgba(78,107,255,.28), transparent 62%),
    radial-gradient(2px 2px at 22% 30%, rgba(234,240,255,.45), transparent 60%),
    radial-gradient(1.6px 1.6px at 68% 24%, rgba(53,224,208,.5), transparent 60%),
    radial-gradient(1.6px 1.6px at 86% 72%, rgba(255,181,98,.4), transparent 60%),
    linear-gradient(160deg, rgba(78,107,255,.12), rgba(19,26,58,.62)),
    var(--bg-deep);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.cta-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center;}
.cta-inner h2{margin-bottom:12px;}
.cta-inner p{margin:0;font-size:15px;}
.cta-note{display:flex;gap:16px;flex-wrap:wrap;margin-top:20px;}
.cta-note span{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);}
.cta-note svg{width:18px;height:18px;fill:none;stroke:var(--brand-2);stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.form-card{
  padding:24px;border-radius:var(--r-glass);
  border:1px solid var(--line);
  background:linear-gradient(160deg, rgba(78,107,255,.12), rgba(19,26,58,.62));
  backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow-1);
}
.form-card label{display:block;font-size:13px;color:var(--ink-2);margin-bottom:8px;}
.form-card input{
  width:100%;padding:13px 14px;font-size:15px;font-family:inherit;
  color:var(--ink);background:rgba(8,13,30,.85);
  border:1px solid var(--line);border-radius:var(--r-input);
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.form-card input::placeholder{color:var(--ink-3);}
.form-card input:focus{outline:none;border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(53,224,208,.16);}
.form-field{margin-bottom:16px;}
.form-field.is-error input{border-color:var(--danger);box-shadow:0 0 0 3px rgba(255,107,107,.14);}
.form-msg{font-size:12px;margin-top:8px;color:var(--ink-3);min-height:16px;}
.form-field.is-error .form-msg{color:#FF8A8A;}
.form-result{margin-top:14px;padding:12px 14px;border-radius:10px;font-size:13px;display:none;}
.form-result.is-success{display:block;color:var(--brand-2);background:rgba(53,224,208,.1);border:1px solid rgba(53,224,208,.35);}
.form-result.is-error{display:block;color:#FF8A8A;background:rgba(255,107,107,.08);border:1px solid rgba(255,107,107,.35);}
.form-hint{font-size:12px;color:var(--ink-3);margin:12px 0 0;}

/* ============ 页脚 ============ */
.site-footer{margin-top:0;padding:64px 0 24px;background:linear-gradient(180deg,rgba(7,11,26,.6),rgba(7,11,26,.95));border-top:1px solid var(--line);}
.footer-grid{row-gap:32px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--ink-3);max-width:32em;margin:0;}
.footer-col h4{font-size:14px;color:var(--ink);margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul{display:grid;gap:10px;}
.footer-col li,.footer-col a{font-size:14px;color:var(--ink-2);}
.footer-bottom{
  margin-top:40px;padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-3);
}

/* ============ 动效 ============ */
.reveal-up{opacity:0;transform:translateY(12px);animation:rise .4s var(--ease) forwards;}
@keyframes rise{to{opacity:1;transform:none;}}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  .reveal-up{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* ============ 断点 ============ */
@media (max-width:1024px){
  .split{grid-template-columns:1fr;gap:26px;}
  .split--reverse .split__media{order:0;}
  .split + .split{margin-top:44px;}
  .cta-inner{grid-template-columns:1fr;gap:28px;}
  .panel-grid{grid-template-columns:1fr;}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex;}
  .nav-panel{flex-wrap:wrap;padding:10px 12px;}
  .nav-cards{
    display:none;width:100%;margin:8px 0 0;
    grid-template-columns:1fr 1fr;gap:10px;
  }
  .nav-panel.is-open .nav-cards{display:grid;}
  .nav-card{width:100%;min-height:56px;justify-content:flex-start;}
  .nav-cta{display:none;}
  .nav-panel.is-open .nav-cta{display:inline-flex;width:100%;margin-top:10px;justify-content:center;}
  .section{padding:52px 0;}
  .banner__media{height:220px;}
}
@media (max-width:640px){
  body{font-size:15px;line-height:1.9;}
  .brand__text{font-size:14px;}
  .brand__text small{display:none;}
  .nav-cards{grid-template-columns:1fr;}
  .banner__media{height:auto;padding:28px 0 30px;background-position:center;}
  .banner__inner{position:static;padding:26px 18px;}
  .banner h1{font-size:26px;}
  .section{padding:44px 0;}
  .cta-band{padding:44px 0;}
  .btn{padding:13px 20px;}
  .form-card,.panel{padding:20px;}
  .footer-bottom{flex-direction:column;gap:6px;}
}

/* roulang page: category2 */
:root{
  --bg-deep:#070B1A;
  --bg-panel:#0E1430;
  --bg-elev:#131A3A;
  --brand:#4E6BFF;
  --brand-2:#35E0D0;
  --accent:#FFB562;
  --ink:#EAF0FF;
  --ink-2:#A9B6D9;
  --ink-3:#6E7BA3;
  --line:rgba(120,150,255,.18);
  --line-strong:rgba(53,224,208,.4);
  --danger:#FF7A6B;

  --r-card:16px;
  --r-glass:18px;
  --r-btn:12px;
  --r-input:10px;
  --r-pill:999px;

  --shadow-1:0 12px 32px rgba(3,6,20,.55);
  --shadow-2:0 16px 40px rgba(3,6,20,.72);

  --gap-sm:16px;
  --gap-md:20px;
  --gap-lg:24px;

  --pad-sec:88px;
  --pad-sec-m:56px;
  --max:1200px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:
    radial-gradient(1100px 620px at 82% -12%, rgba(78,107,255,.18), transparent 62%),
    linear-gradient(180deg,#0A1030 0%, #0C1230 42%, #0B1130 100%);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--ink);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-2);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{
  margin:0;
  letter-spacing:-.01em;
  font-weight:700;
  color:var(--ink);
  line-height:1.35;
}
h1{font-size:clamp(28px,4.2vw,46px);}
h2{font-size:clamp(22px,2.6vw,32px);}
h3{font-size:19px;font-weight:600;}
h4{font-size:16px;font-weight:600;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px;}

.container{
  width:100%;
  max-width:var(--max);
  margin:0 auto;
  padding:0 20px;
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border-radius:var(--r-btn);
  border:1.5px solid transparent;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  transition:transform .2s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease, color .2s ease;
  white-space:nowrap;
}
.btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.btn--primary{
  color:#fff;
  background:linear-gradient(135deg,#4E6BFF,#6B4EFF);
  box-shadow:0 8px 24px rgba(78,107,255,.35);
}
.btn--primary:hover{color:#fff;filter:brightness(1.06);box-shadow:0 8px 24px rgba(78,107,255,.4),0 0 26px rgba(53,224,208,.45);}
.btn--primary:active{transform:translateY(1px);}
.btn--ghost{
  color:var(--ink);
  background:transparent;
  border-color:rgba(78,107,255,.85);
}
.btn--ghost:hover{color:#fff;background:rgba(78,107,255,.12);box-shadow:0 0 20px rgba(78,107,255,.28);}
.btn--ghost:active{transform:translateY(1px);}
.btn--sm{padding:10px 18px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:linear-gradient(160deg, rgba(78,107,255,.12), rgba(19,26,58,.62));
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 0 rgba(255,255,255,.05) inset;
}
.site-header.is-scrolled{background:linear-gradient(160deg, rgba(11,17,48,.94), rgba(14,20,48,.96));}
.nav-panel{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:76px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  flex-shrink:0;
}
.brand__mark{
  width:40px;height:40px;
  display:grid;place-items:center;
  border-radius:12px;
  background:linear-gradient(135deg,rgba(78,107,255,.9),rgba(53,224,208,.55));
  box-shadow:0 6px 18px rgba(78,107,255,.35);
}
.brand__mark svg{width:22px;height:22px;fill:none;stroke:#fff;stroke-width:1.5;stroke-linejoin:round;stroke-linecap:round;}
.brand__text{
  display:flex;
  flex-direction:column;
  font-size:16px;
  font-weight:700;
  letter-spacing:-.01em;
  line-height:1.2;
}
.brand__text small{
  font-size:11.5px;
  font-weight:400;
  color:var(--ink-3);
  letter-spacing:0;
  margin-top:3px;
}
.nav-cards{
  display:flex;
  align-items:center;
  gap:8px;
  margin-left:auto;
}
.nav-card{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:46px;
  padding:0 14px;
  border-radius:12px;
  border:1px solid transparent;
  font-size:14px;
  font-weight:500;
  color:var(--ink-2);
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.nav-card svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.nav-card:hover{background:rgba(78,107,255,.12);border-color:var(--line);color:var(--ink);}
.nav-card.is-active{
  color:#fff;
  background:rgba(78,107,255,.16);
  border-color:var(--line);
}
.nav-card.is-active::before{
  content:"";
  position:absolute;
  left:-1px;top:9px;bottom:9px;
  width:3px;
  border-radius:3px;
  background:var(--brand-2);
  box-shadow:0 0 12px rgba(53,224,208,.7);
}
.nav-cta{flex-shrink:0;}
.nav-toggle{
  display:none;
  margin-left:auto;
  width:46px;height:46px;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(19,26,58,.7);
  color:var(--ink);
  cursor:pointer;
  align-items:center;
  justify-content:center;
}
.nav-toggle svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;}

/* ============ 内页头图 ============ */
.page-hero{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background:var(--bg-deep);
}
.page-hero__media{
  position:absolute;
  inset:0;
}
.page-hero__media img{
  width:100%;height:100%;
  object-fit:cover;
  object-position:center;
  opacity:.5;
}
.page-hero__media::after{
  content:"";
  position:absolute;inset:0;
  background:
    linear-gradient(90deg, rgba(7,11,26,.94) 0%, rgba(7,11,26,.78) 46%, rgba(7,11,26,.42) 100%),
    radial-gradient(600px 240px at 88% 8%, rgba(78,107,255,.28), transparent 70%);
}
.page-hero__inner{
  position:relative;
  z-index:2;
  padding-top:56px;
  padding-bottom:56px;
  max-width:820px;
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--ink-3);
  margin-bottom:20px;
}
.breadcrumb a{color:var(--ink-3);}
.breadcrumb a:hover{color:var(--brand-2);}
.breadcrumb .sep{font-size:12px;color:var(--ink-3);opacity:.7;}
.breadcrumb .current{color:var(--ink-2);}
.page-hero h1{margin-bottom:16px;}
.page-hero .lede{
  font-size:16.5px;
  color:var(--ink-2);
  max-width:660px;
  margin-bottom:24px;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 14px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:rgba(19,26,58,.62);
  font-size:12.5px;
  color:var(--ink-2);
}
.tag--accent{border-color:rgba(255,181,98,.42);color:var(--accent);}
.tag svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}

/* ============ 板块通用 ============ */
.section{padding:var(--pad-sec) 0;}
.section--tight{padding-top:64px;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:38px;
}
.section-head__text{max-width:680px;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--brand-2);
  margin-bottom:12px;
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--brand-2),transparent);
}
.section-head h2{margin-bottom:12px;}
.section-head p{color:var(--ink-2);font-size:15px;margin:0;}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:14px;
  font-weight:600;
  color:var(--brand-2);
  white-space:nowrap;
}
.text-link svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s ease;}
.text-link:hover svg{transform:translateX(3px);}

/* ============ 宽卡横排（2 列 + 通栏） ============ */
.wide-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:var(--gap-lg);
}
.wide-card{
  position:relative;
  display:flex;
  flex-direction:column;
  background:linear-gradient(160deg, rgba(78,107,255,.12), rgba(19,26,58,.62));
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:var(--r-glass);
  box-shadow:var(--shadow-1);
  overflow:hidden;
  transition:transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.wide-card::before{
  content:"";
  position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent);
}
.wide-card:hover{
  transform:translateY(-2px);
  border-color:var(--line-strong);
  box-shadow:var(--shadow-2),0 0 24px rgba(53,224,208,.18);
}
.wide-card__body{padding:28px 26px 30px;}
.wide-card__top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-bottom:16px;
}
.icon-badge{
  width:44px;height:44px;
  display:grid;place-items:center;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(78,107,255,.14);
  color:var(--brand-2);
  flex-shrink:0;
}
.icon-badge svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.wide-card h3{margin-bottom:12px;}
.wide-card p{color:var(--ink-2);font-size:14.5px;line-height:1.85;margin-bottom:18px;}
.mini-list{display:grid;gap:9px;}
.mini-list li{
  position:relative;
  padding-left:20px;
  font-size:14px;
  color:var(--ink-2);
}
.mini-list li::before{
  content:"";
  position:absolute;
  left:2px;top:.72em;
  width:7px;height:7px;
  background:var(--brand-2);
  border-radius:2px;
  transform:rotate(45deg);
  opacity:.85;
}
.mini-list--amber li::before{background:var(--accent);}

.wide-card--full{
  grid-column:1 / -1;
  flex-direction:row;
  align-items:stretch;
}
.wide-card--full .wide-card__figure{
  position:relative;
  flex:0 0 46%;
  min-height:280px;
  overflow:hidden;
}
.wide-card--full .wide-card__figure img{
  width:100%;height:100%;
  object-fit:cover;
  aspect-ratio:16/9;
}
.wide-card--full .wide-card__figure::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(90deg,transparent 42%,rgba(14,20,48,.85) 100%);
}
.wide-card--full .wide-card__body{
  flex:1 1 auto;
  display:flex;
  flex-direction:column;
  justify-content:center;
  padding:34px 34px 34px 10px;
}
.kpi-row{
  display:flex;
  flex-wrap:wrap;
  gap:26px;
  margin-top:22px;
  padding-top:20px;
  border-top:1px solid var(--line);
}
.kpi{display:flex;flex-direction:column;gap:2px;}
.kpi b{
  font-size:24px;
  font-weight:700;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}
.kpi span{font-size:12px;color:var(--ink-3);}

/* ============ 编号要点 ============ */
.points-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 340px;
  gap:var(--gap-lg);
  align-items:start;
}
.point-list{
  display:grid;
  gap:14px;
  counter-reset:pt;
}
.point{
  counter-increment:pt;
  position:relative;
  display:grid;
  grid-template-columns:56px minmax(0,1fr);
  gap:18px;
  padding:22px 24px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--bg-elev);
  transition:border-color .25s ease, box-shadow .25s ease, transform .25s ease;
}
.point:hover{
  transform:translateY(-2px);
  border-color:var(--line-strong);
  box-shadow:0 0 24px rgba(53,224,208,.18);
}
.point::before{
  content:counter(pt,decimal-leading-zero);
  display:grid;place-items:center;
  width:56px;height:56px;
  border-radius:50%;
  font-size:15px;
  font-weight:700;
  color:var(--brand-2);
  border:1px solid rgba(53,224,208,.42);
  background:rgba(53,224,208,.08);
  font-variant-numeric:tabular-nums;
}
.point h3{margin-bottom:8px;font-size:17.5px;}
.point p{color:var(--ink-2);font-size:14.5px;margin:0;}
.point em{
  display:block;
  margin-top:10px;
  font-style:normal;
  font-size:13px;
  color:var(--ink-3);
}

.side-card{
  position:sticky;
  top:100px;
  padding:26px 24px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:linear-gradient(180deg,var(--bg-elev),var(--bg-panel));
  box-shadow:var(--shadow-1);
}
.side-card h3{margin-bottom:16px;font-size:17px;}
.side-card ul{display:grid;gap:12px;}
.side-card li{
  display:flex;
  gap:10px;
  font-size:14px;
  color:var(--ink-2);
  padding-bottom:12px;
  border-bottom:1px dashed rgba(120,150,255,.14);
}
.side-card li:last-child{border-bottom:0;padding-bottom:0;}
.side-card li svg{
  width:17px;height:17px;flex:0 0 17px;
  margin-top:5px;
  fill:none;stroke:var(--brand-2);stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;
}
.side-card .btn{width:100%;margin-top:20px;}

/* ============ FAQ ============ */
.faq-wrap{max-width:920px;margin:0 auto;}
.faq-accordion{border:0;background:transparent;}
.faq-accordion .accordion-item{
  border:1px solid var(--line);
  border-radius:var(--r-glass);
  background:linear-gradient(160deg, rgba(78,107,255,.12), rgba(19,26,58,.62));
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .25s ease, box-shadow .25s ease;
}
.faq-accordion .accordion-item:hover{
  border-color:var(--line-strong);
  box-shadow:0 0 24px rgba(53,224,208,.18);
}
.faq-accordion .accordion-item.is-active{
  border-color:rgba(53,224,208,.4);
}
.faq-accordion .accordion-title{
  position:relative;
  display:flex;
  align-items:center;
  gap:14px;
  padding:20px 58px 20px 24px;
  border:0;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  background:transparent;
}
.faq-accordion .accordion-title:hover,
.faq-accordion .accordion-title:focus{color:var(--ink);background:rgba(78,107,255,.08);}
.faq-accordion .accordion-title .idx{
  font-size:13px;
  font-weight:700;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
  flex:0 0 auto;
}
.faq-accordion .accordion-title::after{
  content:"";
  position:absolute;
  right:24px;top:50%;
  width:12px;height:12px;
  margin-top:-6px;
  border-right:1.5px solid var(--brand-2);
  border-bottom:1.5px solid var(--brand-2);
  transform:rotate(45deg);
  transition:transform .2s ease;
}
.faq-accordion .accordion-item.is-active .accordion-title::after{
  transform:rotate(-135deg);
  margin-top:-2px;
}
.faq-accordion .accordion-content{
  border:0;
  padding:0 24px 22px 76px;
  background:transparent;
  color:var(--ink-2);
  font-size:15px;
  line-height:1.85;
}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  background:
    radial-gradient(720px 320px at 12% 0%, rgba(78,107,255,.28), transparent 68%),
    radial-gradient(560px 300px at 92% 100%, rgba(53,224,208,.16), transparent 70%),
    var(--bg-deep);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.cta-band .container{
  position:relative;
  z-index:2;
  padding-top:64px;
  padding-bottom:64px;
  display:grid;
  grid-template-columns:minmax(0,1fr) 400px;
  gap:44px;
  align-items:center;
}
.cta-band h2{margin-bottom:14px;}
.cta-band p{color:var(--ink-2);font-size:15px;margin:0;max-width:520px;}
.cta-form{
  padding:26px 24px;
  border-radius:var(--r-glass);
  border:1px solid var(--line);
  background:linear-gradient(160deg, rgba(78,107,255,.14), rgba(19,26,58,.68));
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow-1),0 0 24px rgba(53,224,208,.12);
}
.field{margin-bottom:16px;}
.field label{
  display:block;
  font-size:13px;
  color:var(--ink-2);
  margin-bottom:7px;
}
.field input,
.field select{
  width:100%;
  height:46px;
  padding:0 14px;
  border-radius:var(--r-input);
  border:1px solid var(--line);
  background:rgba(7,11,26,.6);
  color:var(--ink);
  font-size:14.5px;
  transition:border-color .2s ease, box-shadow .2s ease;
}
.field input::placeholder{color:var(--ink-3);}
.field input:focus,
.field select:focus{
  outline:none;
  border-color:var(--brand-2);
  box-shadow:0 0 0 3px rgba(53,224,208,.16);
}
.field.is-error input{border-color:var(--danger);}
.field .msg{display:none;font-size:12px;color:var(--danger);margin-top:6px;}
.field.is-error .msg{display:block;}
.form-note{
  display:none;
  margin-bottom:16px;
  padding:10px 14px;
  border-radius:10px;
  font-size:13px;
  color:#062;
  background:rgba(53,224,208,.9);
}
.form-note.is-on{display:block;}
.cta-form .btn{width:100%;}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg-deep);
  border-top:1px solid var(--line);
  padding-top:64px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:36px;
  padding-bottom:44px;
}
.footer-brand p{
  margin-top:16px;
  color:var(--ink-3);
  font-size:13.5px;
  line-height:1.85;
  max-width:300px;
}
.footer-col h4{
  font-size:14px;
  color:var(--ink);
  margin-bottom:16px;
  letter-spacing:.02em;
}
.footer-col ul{display:grid;gap:11px;}
.footer-col li{font-size:13.5px;color:var(--ink-3);}
.footer-col a{color:var(--ink-3);font-size:13.5px;}
.footer-col a:hover{color:var(--brand-2);}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:20px 0 28px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--ink-3);
}

/* ============ 动效 ============ */
.reveal-up{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .4s ease, transform .4s ease;
}
.reveal-up.is-in{opacity:1;transform:none;}

/* ============ 断点 ============ */
@media (max-width:1024px){
  :root{--pad-sec:68px;}
  .points-layout{grid-template-columns:minmax(0,1fr);}
  .side-card{position:static;}
  .cta-band .container{grid-template-columns:minmax(0,1fr);gap:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .wide-card--full{flex-direction:column;}
  .wide-card--full .wide-card__figure{flex:0 0 auto;width:100%;min-height:0;}
  .wide-card--full .wide-card__figure::after{
    background:linear-gradient(180deg,transparent 40%,rgba(14,20,48,.9) 100%);
  }
  .wide-card--full .wide-card__body{padding:26px 26px 30px;}
}

@media (max-width:900px){
  .nav-panel{flex-wrap:wrap;min-height:68px;}
  .nav-toggle{display:inline-flex;}
  .nav-cards{
    display:none;
    order:3;
    width:100%;
    margin:0 0 18px;
    padding:16px;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:10px;
    border-radius:var(--r-glass);
    border:1px solid var(--line);
    background:linear-gradient(160deg, rgba(78,107,255,.12), rgba(19,26,58,.72));
  }
  .nav-cards.is-open{display:grid;}
  .nav-cards li{width:100%;}
  .nav-card{
    width:100%;
    height:50px;
    justify-content:flex-start;
    background:rgba(19,26,58,.55);
    border-color:var(--line);
  }
  .nav-cta{display:none;}
}

@media (max-width:768px){
  :root{--pad-sec:56px;}
  body{font-size:15px;line-height:1.9;}
  .wide-grid{grid-template-columns:minmax(0,1fr);gap:var(--gap-md);}
  .wide-card--full{grid-column:auto;}
  .point{grid-template-columns:46px minmax(0,1fr);gap:14px;padding:20px 18px;}
  .point::before{width:46px;height:46px;font-size:13.5px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;}
  .page-hero__inner{padding-top:40px;padding-bottom:40px;}
  .kpi-row{gap:20px;}
  .kpi b{font-size:21px;}
  .faq-accordion .accordion-content{padding-left:24px;}
}

@media (max-width:520px){
  .container{padding:0 16px;}
  .brand__text{font-size:15px;}
  .brand__text small{display:none;}
  .hero-tags .tag{font-size:12px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-bottom{justify-content:flex-start;}
  .wide-card__body{padding:22px 20px 24px;}
  .cta-form{padding:22px 18px;}
}

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

/* roulang page: category3 */
/* ===== 设计变量 ===== */
:root{
  --bg-deep:#070B1A;
  --bg-panel:#0E1430;
  --bg-elev:#131A3A;
  --brand:#4E6BFF;
  --brand-2:#35E0D0;
  --accent:#FFB562;
  --ink:#EAF0FF;
  --ink-2:#A9B6D9;
  --ink-3:#6E7BA3;
  --line:rgba(120,150,255,.18);
  --line-strong:rgba(120,150,255,.32);
  --glass:linear-gradient(160deg,rgba(78,107,255,.12),rgba(19,26,58,.62));
  --r-card:16px;
  --r-glass:18px;
  --r-btn:12px;
  --r-input:10px;
  --shadow-1:0 12px 32px rgba(3,6,20,.55);
  --shadow-2:0 18px 44px rgba(3,6,20,.72);
  --sp-1:8px;
  --sp-2:16px;
  --sp-3:24px;
  --sp-4:32px;
  --sp-5:56px;
  --sp-6:88px;
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}

/* ===== reset base ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--ink);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--ink);text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease;}
a:hover{color:var(--brand-2);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3,h4{letter-spacing:-.01em;font-weight:700;line-height:1.3;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(78,107,255,.4);color:#fff;}

/* ===== 容器 ===== */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1024px){.container{padding:0 32px;}}

/* ===== 通用区块 ===== */
.section{padding:var(--sp-5) 0;position:relative;}
@media (min-width:1024px){.section{padding:var(--sp-6) 0;}}
.section--panel{background:var(--bg-panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section--elev{background:linear-gradient(180deg,var(--bg-panel),var(--bg-elev));}
.section__head{max-width:720px;margin-bottom:var(--sp-4);}
.section__head h2{font-size:clamp(22px,2.6vw,32px);margin-bottom:12px;}
.section__head p{color:var(--ink-2);font-size:15px;line-height:1.9;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;color:var(--brand-2);
  border:1px solid rgba(53,224,208,.35);
  border-radius:999px;padding:4px 12px;margin-bottom:16px;
  background:rgba(53,224,208,.07);
}
.divider{height:1px;background:linear-gradient(90deg,var(--line-strong),rgba(120,150,255,0));border:0;margin:var(--sp-4) 0;}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:0;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 26px;
  transition:transform .18s ease,box-shadow .22s ease,background-color .22s ease,color .22s ease,filter .22s ease;
}
.btn--primary{
  background:linear-gradient(135deg,#4E6BFF,#6B4EFF);
  color:#fff;
  box-shadow:0 8px 24px rgba(78,107,255,.35);
}
.btn--primary:hover{filter:brightness(1.06);color:#fff;box-shadow:0 10px 28px rgba(78,107,255,.42),0 0 26px rgba(53,224,208,.45);}
.btn--primary:active{transform:translateY(1px);box-shadow:0 6px 16px rgba(78,107,255,.32);}
.btn--ghost{
  background:transparent;color:var(--ink);
  border:1.5px solid rgba(78,107,255,.72);
}
.btn--ghost:hover{background:rgba(78,107,255,.12);color:#fff;}
.btn--ghost:active{transform:translateY(1px);}
.btn--sm{padding:11px 20px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;filter:grayscale(.3);}
.btn--block{width:100%;}

/* ===== 顶栏导航面板 ===== */
.site-header{position:sticky;top:0;z-index:60;padding:12px 0;background:rgba(7,11,26,.72);backdrop-filter:blur(10px);transition:background-color .25s ease,box-shadow .25s ease;}
.site-header.is-stuck{background:rgba(7,11,26,.94);box-shadow:0 10px 30px rgba(3,6,20,.6);}
.nav-panel{
  display:flex;align-items:center;gap:16px;
  min-height:76px;
  padding:10px 16px;
  border-radius:var(--r-glass);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow-1),inset 0 1px 0 rgba(255,255,255,.06);
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand__mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(78,107,255,.9),rgba(53,224,208,.65));
  box-shadow:0 6px 18px rgba(78,107,255,.35);
}
.brand__mark svg{width:22px;height:22px;fill:none;stroke:#fff;stroke-width:1.5;stroke-linejoin:round;}
.brand__text{display:flex;flex-direction:column;font-size:15px;font-weight:700;color:var(--ink);line-height:1.25;}
.brand__text small{font-size:11px;font-weight:400;color:var(--ink-3);letter-spacing:.02em;}
.nav-toggle{
  display:none;margin-left:auto;
  width:44px;height:44px;border-radius:12px;
  background:rgba(19,26,58,.8);border:1px solid var(--line);
  align-items:center;justify-content:center;
}
.nav-toggle svg{width:20px;height:20px;fill:none;stroke:var(--ink);stroke-width:1.5;stroke-linecap:round;}
.nav-toggle:hover{border-color:rgba(53,224,208,.5);}
.nav-cards{display:flex;align-items:center;gap:8px;margin-left:auto;flex-wrap:nowrap;}
.nav-card{
  display:inline-flex;align-items:center;gap:7px;
  height:46px;padding:0 14px;
  border-radius:12px;
  border:1px solid transparent;
  color:var(--ink-2);font-size:14px;font-weight:500;white-space:nowrap;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.nav-card svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
.nav-card:hover{background:rgba(78,107,255,.12);color:var(--ink);border-color:var(--line);}
.nav-card.is-active{
  color:var(--ink);
  background:rgba(53,224,208,.08);
  border-color:rgba(53,224,208,.28);
  box-shadow:inset 3px 0 0 var(--brand-2);
}
.nav-cta{flex:0 0 auto;margin-left:8px;}

/* ===== 分类页头图 ===== */
.page-hero{position:relative;background:var(--bg-deep);border-bottom:1px solid var(--line);overflow:hidden;}
.page-hero__media{position:relative;height:230px;overflow:hidden;}
.page-hero__media img{width:100%;height:100%;object-fit:cover;}
.page-hero__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,26,.45),rgba(7,11,26,.94)),radial-gradient(circle at 78% 18%,rgba(78,107,255,.28),transparent 55%);
}
.page-hero__inner{position:relative;padding-top:26px;padding-bottom:34px;margin-top:-96px;z-index:2;}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--ink-3);margin-bottom:14px;flex-wrap:wrap;}
.breadcrumb a{color:var(--ink-2);}
.breadcrumb a:hover{color:var(--brand-2);}
.breadcrumb span[aria-current]{color:var(--ink-2);}
.breadcrumb .sep{color:rgba(110,123,163,.7);}
.page-hero h1{font-size:clamp(28px,4.2vw,46px);max-width:840px;margin-bottom:14px;}
.lede{color:var(--ink-2);font-size:16px;line-height:1.9;max-width:640px;}

/* ===== 对比双栏 ===== */
.cmp-grid{display:grid;gap:24px;grid-template-columns:1fr;}
@media (min-width:900px){.cmp-grid{grid-template-columns:1fr 1fr;}}
.cmp-card{
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--bg-elev);
  box-shadow:var(--shadow-1);
  overflow:hidden;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.cmp-card:hover{transform:translateY(-2px);border-color:rgba(53,224,208,.4);box-shadow:var(--shadow-2),0 0 24px rgba(53,224,208,.18);}
.cmp-card__media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-deep);}
.cmp-card__media img{width:100%;height:100%;object-fit:cover;}
.cmp-card__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,11,26,.15),rgba(7,11,26,.75));}
.cmp-card__tag{
  position:absolute;left:14px;bottom:12px;z-index:2;
  font-size:12px;color:#fff;padding:5px 12px;border-radius:999px;
  background:rgba(78,107,255,.55);border:1px solid rgba(255,255,255,.22);backdrop-filter:blur(6px);
}
.cmp-card__body{padding:22px;}
.cmp-card__body h3{font-size:19px;margin-bottom:10px;}
.cmp-card__body p{color:var(--ink-2);font-size:15px;line-height:1.9;margin-bottom:14px;}
.cmp-list{margin-top:6px;}
.cmp-list li{position:relative;padding-left:22px;color:var(--ink-2);font-size:14px;line-height:1.9;margin-bottom:8px;}
.cmp-list li::before{content:"";position:absolute;left:4px;top:12px;width:7px;height:7px;background:var(--brand-2);transform:rotate(45deg);border-radius:2px;box-shadow:0 0 8px rgba(53,224,208,.7);}

/* ===== 时间线 ===== */
.timeline{position:relative;display:grid;gap:20px;}
.timeline::before{content:"";position:absolute;left:19px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,rgba(53,224,208,.75),rgba(78,107,255,.18));}
@media (min-width:1024px){
  .timeline{grid-template-columns:repeat(5,1fr);gap:20px;}
  .timeline::before{left:6%;right:6%;top:21px;bottom:auto;width:auto;height:2px;background:linear-gradient(90deg,rgba(53,224,208,.75),rgba(78,107,255,.1));}
}
.tl-item{position:relative;padding-left:58px;}
@media (min-width:1024px){.tl-item{padding-left:0;padding-top:56px;}}
.tl-dot{
  position:absolute;left:8px;top:4px;width:24px;height:24px;border-radius:50%;
  background:var(--bg-panel);border:2px solid var(--brand-2);
  box-shadow:0 0 16px rgba(53,224,208,.5);
  display:grid;place-items:center;font-size:0;
}
.tl-dot::after{content:"";width:8px;height:8px;border-radius:50%;background:var(--brand-2);}
@media (min-width:1024px){.tl-dot{left:0;top:10px;}}
.tl-num{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:12px;color:var(--accent);letter-spacing:.08em;display:block;margin-bottom:6px;
}
.tl-item h3{font-size:18px;margin-bottom:8px;}
.tl-item p{color:var(--ink-2);font-size:14.5px;line-height:1.9;}

/* ===== 定义列表 ===== */
.deflist{border-top:1px solid var(--line);}
.deflist__row{
  display:grid;gap:6px 24px;grid-template-columns:1fr;
  padding:22px 0;border-bottom:1px solid var(--line);
  transition:background-color .2s ease,padding-left .2s ease;
}
@media (min-width:900px){.deflist__row{grid-template-columns:230px 1fr;align-items:start;}}
.deflist__row:hover{background:rgba(78,107,255,.06);padding-left:12px;}
.deflist__row dt{font-size:16px;font-weight:600;color:var(--ink);display:flex;align-items:center;gap:10px;}
.deflist__row dt::before{content:"";width:8px;height:8px;background:var(--brand);transform:rotate(45deg);border-radius:2px;flex:0 0 auto;}
.deflist__row dd{margin:0;color:var(--ink-2);font-size:15px;line-height:1.9;}

/* ===== 数据条 ===== */
.stats{display:grid;gap:16px;grid-template-columns:1fr;}
@media (min-width:640px){.stats{grid-template-columns:repeat(3,1fr);gap:20px;}}
.stat{
  border:1px solid var(--line);border-radius:var(--r-card);
  background:linear-gradient(180deg,var(--bg-elev),var(--bg-panel));
  padding:22px;
}
.stat__num{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:30px;font-weight:700;color:var(--accent);line-height:1.1;}
.stat__label{display:block;font-size:12px;color:var(--ink-3);margin-top:8px;letter-spacing:.04em;}
.stat p{color:var(--ink-2);font-size:14px;line-height:1.85;margin-top:12px;}

/* ===== 图文两栏 ===== */
.split{display:grid;gap:28px;grid-template-columns:1fr;align-items:center;}
@media (min-width:900px){.split{grid-template-columns:1fr 1fr;gap:44px;}}
.split__media{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-1);}
.split__media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.split__body h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:14px;}
.split__body p{color:var(--ink-2);font-size:15.5px;line-height:1.95;margin-bottom:14px;}
.check-list li{position:relative;padding-left:28px;margin-bottom:10px;color:var(--ink-2);font-size:15px;line-height:1.9;}
.check-list li svg{position:absolute;left:0;top:4px;width:18px;height:18px;fill:none;stroke:var(--brand-2);stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}

/* ===== FAQ ===== */
.faq{display:grid;gap:14px;}
.faq-item{
  border-radius:var(--r-glass);border:1px solid var(--line);
  background:var(--glass);backdrop-filter:blur(14px);
  box-shadow:var(--shadow-1),inset 0 1px 0 rgba(255,255,255,.05);
  overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:rgba(53,224,208,.4);box-shadow:var(--shadow-2),0 0 24px rgba(53,224,208,.16);}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;text-align:left;
  background:transparent;border:0;color:var(--ink);
  padding:20px 22px;font-size:16px;font-weight:600;line-height:1.6;
}
.faq-q .idx{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px;color:var(--brand-2);flex:0 0 auto;}
.faq-q .qtext{flex:1 1 auto;}
.faq-q .sign{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line-strong);display:grid;place-items:center;
  transition:transform .2s ease,background-color .2s ease,border-color .2s ease;
}
.faq-q .sign svg{width:14px;height:14px;fill:none;stroke:var(--ink-2);stroke-width:1.6;stroke-linecap:round;}
.faq-item.is-open .sign{transform:rotate(180deg);background:rgba(53,224,208,.12);border-color:rgba(53,224,208,.5);}
.faq-item.is-open .sign svg{stroke:var(--brand-2);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-item.is-open .faq-a{max-height:420px;}
.faq-a p{padding:0 22px 22px 60px;color:var(--ink-2);font-size:15px;line-height:1.85;}

/* ===== CTA 条 ===== */
.cta-band{
  position:relative;overflow:hidden;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--bg-deep);
  padding:56px 0;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:var(--glass),radial-gradient(circle at 12% 20%,rgba(78,107,255,.3),transparent 52%),radial-gradient(circle at 88% 80%,rgba(53,224,208,.16),transparent 50%);
  backdrop-filter:blur(6px);
}
.cta-inner{position:relative;display:grid;gap:24px;grid-template-columns:1fr;align-items:center;}
@media (min-width:900px){.cta-inner{grid-template-columns:1.4fr 1fr;gap:40px;}}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:12px;}
.cta-inner p{color:var(--ink-2);font-size:15px;line-height:1.9;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}
@media (min-width:900px){.cta-actions{justify-content:flex-end;}}

/* ===== 页脚 ===== */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:56px 0 26px;margin-top:0;}
.footer-grid{row-gap:30px;}
.footer-brand .brand{margin-bottom:14px;}
.footer-brand p{color:var(--ink-2);font-size:14px;line-height:1.9;max-width:300px;}
.footer-col h4{font-size:15px;margin-bottom:14px;color:var(--ink);}
.footer-col ul li{margin-bottom:9px;}
.footer-col ul li a,.footer-col ul li span{color:var(--ink-2);font-size:14px;}
.footer-col ul li a:hover{color:var(--brand-2);}
.footer-bottom{
  margin-top:36px;padding-top:18px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  color:var(--ink-3);font-size:13px;
}

/* ===== 动效 ===== */
.reveal-up{opacity:0;transform:translateY(12px);animation:rise .4s ease forwards;}
@keyframes rise{to{opacity:1;transform:none;}}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal-up{opacity:1;transform:none;}
}

/* ===== 响应式 ===== */
@media (max-width:900px){
  .nav-toggle{display:flex;}
  .nav-cards{
    display:none;
    position:absolute;left:20px;right:20px;top:calc(100% - 2px);
    background:rgba(14,20,48,.98);
    border:1px solid var(--line);border-radius:var(--r-glass);
    padding:14px;gap:10px;margin:0;
    grid-template-columns:1fr 1fr;
    box-shadow:var(--shadow-2);
    backdrop-filter:blur(14px);
  }
  .nav-cards.is-open{display:grid;}
  .nav-panel{position:relative;}
  .nav-card{width:100%;height:52px;justify-content:flex-start;background:rgba(19,26,58,.7);}
  .nav-cta{display:none;}
}
@media (max-width:640px){
  body{font-size:15px;line-height:1.9;}
  .page-hero__media{height:180px;}
  .page-hero__inner{margin-top:-70px;padding-top:18px;padding-bottom:26px;}
  .section{padding:48px 0;}
  .lede{font-size:15px;}
  .faq-q{padding:16px;font-size:15px;}
  .faq-a p{padding:0 16px 18px 16px;}
  .nav-cards{grid-template-columns:1fr;}
  .cta-band{padding:44px 0;}
}