/* roulang page: index */
:root{
  --c-primary:#12E1A5;
  --c-secondary:#6C4BFF;
  --c-accent:#FFC42E;
  --bg-base:#0A0C10;
  --bg-surface:#11151B;
  --bg-elevated:#171C24;
  --bg-deep:#07090C;
  --line:#232A34;
  --divider:rgba(255,255,255,.06);
  --text:#EAF0F4;
  --text-2:#93A1AE;
  --text-3:#5C6975;
  --text-inv:#06120E;
  --ok:#2FD67A;
  --warn:#FFB020;
  --err:#FF5C5C;
  --r-card:16px;
  --r-panel:20px;
  --r-btn:10px;
  --r-chip:999px;
  --r-input:12px;
  --shadow:0 0 0 1px rgba(255,255,255,.06),0 18px 40px -24px rgba(0,0,0,.85);
  --shadow-hover:0 0 0 1px rgba(18,225,165,.45),0 0 26px -6px rgba(18,225,165,.45),0 18px 40px -24px rgba(0,0,0,.85);
  --maxw:1200px;
  --ease:200ms ease-out;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg-base);
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--c-primary)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:none;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3,h4{line-height:1.25;font-weight:800;letter-spacing:.01em}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--surface{background:var(--bg-surface)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-head h2{font-size:clamp(24px,2.6vw,32px)}
.section-head p{color:var(--text-2);font-size:15px;margin-top:10px;max-width:640px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--c-primary);text-transform:uppercase;margin-bottom:14px}
.eyebrow::before{content:"";width:18px;height:2px;background:linear-gradient(90deg,var(--c-primary),var(--c-secondary));border-radius:2px}
.lead{color:var(--text-2);font-size:16px}
.muted{color:var(--text-3);font-size:13px}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:14px;font-weight:600}
.text-link::after{content:"";width:6px;height:6px;border-top:1.6px solid currentColor;border-right:1.6px solid currentColor;transform:rotate(45deg);transition:transform var(--ease)}
.text-link:hover::after{transform:rotate(45deg) translate(2px,-2px)}
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:var(--r-chip);font-size:12px;font-weight:600;letter-spacing:.02em;background:rgba(108,75,255,.16);color:#C6B8FF;border:1px solid rgba(108,75,255,.34)}
.badge--primary{background:rgba(18,225,165,.14);color:var(--c-primary);border-color:rgba(18,225,165,.34)}
.badge--accent{background:rgba(255,196,46,.14);color:var(--c-accent);border-color:rgba(255,196,46,.34)}
.badge--ok{background:rgba(47,214,122,.14);color:var(--ok);border-color:rgba(47,214,122,.32)}
.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:700;
  transition:transform var(--ease),box-shadow var(--ease),background-color var(--ease),color var(--ease),border-color var(--ease);
  border:1px solid transparent;white-space:nowrap;
}
.btn--primary{background:var(--c-primary);color:var(--text-inv)}
.btn--primary:hover{transform:translateY(-1px);box-shadow:0 0 26px -6px rgba(18,225,165,.6);color:var(--text-inv)}
.btn--primary:active{transform:translateY(1px)}
.btn--ghost{background:rgba(255,255,255,.04);color:var(--text);border-color:var(--line)}
.btn--ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(18,225,165,.5);color:var(--text)}
.btn--outline{background:transparent;color:var(--c-primary);border-color:rgba(18,225,165,.45)}
.btn--outline:hover{background:rgba(18,225,165,.1);color:var(--c-primary)}
.btn[disabled]{opacity:.5;cursor:not-allowed;filter:saturate(.6)}
.divider-stripe{height:10px;background:repeating-linear-gradient(135deg,rgba(18,225,165,.22) 0 8px,transparent 8px 16px);border-top:1px solid var(--divider);border-bottom:1px solid var(--divider)}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:rgba(10,12,16,.86);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:border-color var(--ease),background-color var(--ease)}
.site-header.is-stuck{border-bottom-color:var(--line);background:rgba(8,10,13,.94)}
.nav-wrap{display:flex;align-items:center;gap:24px;min-height:72px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));display:grid;place-items:center;color:var(--text-inv);font-weight:800;font-size:18px}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text strong{font-size:16px;font-weight:800;letter-spacing:.01em}
.logo-text span{font-size:11px;color:var(--text-3);letter-spacing:.06em}
.nav-tabs{display:flex;align-items:center;gap:4px;background:rgba(255,255,255,.04);border:1px solid var(--divider);border-radius:var(--r-chip);padding:4px;margin:0 auto;overflow-x:auto;scrollbar-width:none}
.nav-tabs::-webkit-scrollbar{display:none}
.nav-tabs a{padding:9px 16px;border-radius:var(--r-chip);font-size:14px;font-weight:600;color:var(--text-2);white-space:nowrap;transition:background-color var(--ease),color var(--ease)}
.nav-tabs a:hover{background:rgba(255,255,255,.06);color:var(--text)}
.nav-tabs a[aria-current="page"]{background:var(--c-primary);color:var(--text-inv)}
.nav-actions{display:flex;align-items:center;gap:14px;flex-shrink:0}
.nav-actions .btn{padding:10px 18px;font-size:14px}
.nav-link-quiet{font-size:14px;color:var(--text-2);font-weight:600}
.nav-link-quiet:hover{color:var(--c-primary)}
.nav-burger{display:none;width:42px;height:42px;border-radius:var(--r-btn);border:1px solid var(--line);background:rgba(255,255,255,.04);align-items:center;justify-content:center}
.nav-burger span{display:block;width:18px;height:2px;background:var(--text);position:relative}
.nav-burger span::before,.nav-burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text)}
.nav-burger span::before{top:-6px}
.nav-burger span::after{top:6px}
.drawer{position:fixed;inset:0;z-index:80;pointer-events:none}
.drawer-panel{position:absolute;top:0;right:0;width:min(320px,86vw);height:100%;background:var(--bg-surface);border-left:1px solid var(--line);padding:24px;transform:translateX(100%);transition:transform 240ms ease-out;display:flex;flex-direction:column;gap:8px}
.drawer-mask{position:absolute;inset:0;background:rgba(3,5,7,.6);opacity:0;transition:opacity 240ms ease-out}
.drawer.is-open{pointer-events:auto}
.drawer.is-open .drawer-panel{transform:translateX(0)}
.drawer.is-open .drawer-mask{opacity:1}
.drawer-panel a{padding:14px 12px;border-radius:var(--r-btn);font-weight:600;color:var(--text-2);border:1px solid transparent}
.drawer-panel a:hover,.drawer-panel a[aria-current="page"]{background:rgba(255,255,255,.05);color:var(--text);border-color:var(--line)}
.drawer-panel .btn{margin-top:auto}

/* hero */
.hero{position:relative;padding:72px 0 88px;background:
  radial-gradient(1000px 520px at 82% -10%,rgba(108,75,255,.20),transparent 60%),
  radial-gradient(760px 420px at 6% 8%,rgba(18,225,165,.14),transparent 62%),
  var(--bg-base);}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:24px 24px;opacity:.5;pointer-events:none}
.hero-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(30px,3.6vw,44px);margin-bottom:18px}
.hero h1 em{font-style:normal;background:linear-gradient(100deg,var(--c-primary),var(--c-secondary));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{color:var(--text-2);font-size:17px;max-width:560px;margin-bottom:28px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:36px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding-top:26px;border-top:1px solid var(--divider)}
.hero-stats b{display:block;font-size:24px;font-weight:800;color:var(--c-primary);font-variant-numeric:tabular-nums;font-family:ui-monospace,"SFMono-Regular",Menlo,monospace}
.hero-stats span{font-size:13px;color:var(--text-3)}
.hero-visual{position:relative;border-radius:var(--r-panel);overflow:hidden;box-shadow:var(--shadow)}
.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,12,16,.05) 40%,rgba(10,12,16,.86) 100%)}
.hero-chip-card{position:absolute;right:18px;bottom:18px;z-index:2;background:rgba(23,28,36,.92);border:1px solid var(--line);border-radius:14px;padding:14px 16px;min-width:180px;backdrop-filter:blur(6px)}
.hero-chip-card dl{margin:0;display:grid;grid-template-columns:auto auto;gap:4px 14px;font-size:13px}
.hero-chip-card dt{color:var(--text-3)}
.hero-chip-card dd{margin:0;font-weight:700;font-variant-numeric:tabular-nums;text-align:right}

/* metrics */
.metric-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.metric-card{background:var(--bg-surface);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;box-shadow:var(--shadow);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease)}
.metric-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(18,225,165,.4)}
.metric-top{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.metric-num{font-size:38px;font-weight:800;font-variant-numeric:tabular-nums;font-family:ui-monospace,"SFMono-Regular",Menlo,monospace;line-height:1.1}
.metric-num small{font-size:15px;font-weight:700;color:var(--text-2);margin-left:4px}
.metric-label{color:var(--text-2);font-size:14px;margin-top:6px}
.metric-bar{height:6px;border-radius:999px;background:rgba(255,255,255,.07);margin-top:18px;overflow:hidden}
.metric-bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--c-primary),var(--c-secondary))}

/* bento */
.bento{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.bento-card{background:var(--bg-surface);border:1px solid var(--line);border-radius:var(--r-card);padding:26px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:12px;transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease)}
.bento-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(18,225,165,.38)}
.bento-card--main{grid-column:span 2;grid-row:span 2;padding:0;overflow:hidden}
.bento-card--main .bento-media{position:relative}
.bento-card--main .bento-media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.bento-card--main .bento-body{padding:24px 26px 28px}
.bento-card--data{background:linear-gradient(160deg,rgba(108,75,255,.14),rgba(17,21,27,.9))}
.bento-card--narrow{grid-column:span 2;flex-direction:row;align-items:center;justify-content:space-between;gap:20px}
.icon-box{width:40px;height:40px;border-radius:12px;background:rgba(18,225,165,.12);border:1px solid rgba(18,225,165,.28);display:grid;place-items:center;color:var(--c-primary);font-weight:800;font-size:14px;font-variant-numeric:tabular-nums}
.bento-card h3{font-size:19px}
.bento-card p{color:var(--text-2);font-size:14.5px}
.point-list{display:flex;flex-direction:column;gap:8px;margin-top:4px}
.point-list li{position:relative;padding-left:16px;font-size:14px;color:var(--text-2)}
.point-list li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:2px;background:var(--c-primary)}
.mini-metrics{display:flex;gap:20px;margin-top:6px;flex-wrap:wrap}
.mini-metrics div b{display:block;font-size:22px;font-weight:800;color:var(--c-primary);font-variant-numeric:tabular-nums}
.mini-metrics div span{font-size:12px;color:var(--text-3)}

/* compare */
.compare-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:start}
.compare-col{background:var(--bg-surface);border:1px solid var(--line);border-radius:var(--r-card);padding:26px;display:flex;flex-direction:column;gap:16px;box-shadow:var(--shadow)}
.compare-col--best{border-color:rgba(18,225,165,.5);transform:translateY(-8px);box-shadow:var(--shadow-hover)}
.compare-col header{display:flex;align-items:center;justify-content:space-between;gap:10px}
.compare-col h3{font-size:18px}
.compare-price{font-size:15px;color:var(--text-2)}
.compare-list{display:flex;flex-direction:column;gap:11px;font-size:14.5px;color:var(--text-2)}
.compare-list li{display:flex;gap:10px;align-items:flex-start}
.compare-list li::before{content:"✓";color:var(--c-primary);font-weight:800;line-height:1.6}
.compare-list li.off{color:var(--text-3)}
.compare-list li.off::before{content:"—";color:var(--text-3)}
.compare-col .btn{margin-top:auto}

/* news */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:var(--bg-surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease)}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(18,225,165,.35)}
.news-thumb{display:block;overflow:hidden;background:var(--bg-elevated)}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform var(--ease)}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.news-body h3{font-size:17.5px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body p{color:var(--text-2);font-size:14.5px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:14px;border-top:1px solid var(--divider);font-size:13px;color:var(--text-3)}
.empty-state{display:flex;flex-direction:column;align-items:center;gap:16px;padding:56px 24px;border:1px dashed var(--line);border-radius:var(--r-card);text-align:center;background:var(--bg-surface)}
.empty-state svg{width:40px;height:40px;color:var(--text-3)}

/* faq */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq-item{background:var(--bg-surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:border-color var(--ease),background-color var(--ease)}
.faq-item[open]{border-color:rgba(18,225,165,.42);background:var(--bg-elevated);box-shadow:inset 3px 0 0 var(--c-primary)}
.faq-item summary{display:flex;align-items:center;gap:14px;padding:20px 24px;font-weight:700;font-size:16px;cursor:pointer;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";margin-left:auto;font-size:20px;color:var(--c-primary);transition:transform var(--ease)}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-q-icon{width:26px;height:26px;flex-shrink:0;border-radius:8px;background:rgba(18,225,165,.12);border:1px solid rgba(18,225,165,.3);color:var(--c-primary);display:grid;place-items:center;font-size:13px;font-weight:800}
.faq-answer{padding:0 24px 22px 64px;color:var(--text-2);font-size:15px}

/* form */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.trust-list{display:flex;flex-direction:column;gap:14px;margin-top:26px}
.trust-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text-2)}
.trust-list li::before{content:"";width:8px;height:8px;margin-top:8px;border-radius:3px;background:var(--c-primary);flex-shrink:0}
.form-card{background:var(--bg-surface);border:1px solid var(--line);border-radius:var(--r-panel);padding:28px;box-shadow:var(--shadow)}
.form-row{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.form-row label{font-size:14px;font-weight:600}
.form-row input,.form-row select,.form-row textarea{
  width:100%;padding:12px 14px;border-radius:var(--r-input);
  background:rgba(255,255,255,.03);border:1px solid var(--line);color:var(--text);
  transition:border-color var(--ease),box-shadow var(--ease),background-color var(--ease);
}
.form-row textarea{min-height:110px;resize:vertical}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 2px rgba(18,225,165,.35);background:rgba(255,255,255,.05)}
.form-row .field-error{font-size:13px;color:var(--err);min-height:16px}
.check-row{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text-2);margin:4px 0 20px}
.check-row input{width:18px;height:18px;margin-top:3px;accent-color:var(--c-primary)}
.form-msg{display:none;align-items:center;gap:10px;padding:12px 16px;border-radius:var(--r-btn);font-size:14px;margin-bottom:18px}
.form-msg.is-success{display:flex;background:rgba(47,214,122,.1);border-left:3px solid var(--ok);color:#BFF0D4}
.form-msg.is-error{display:flex;background:rgba(255,92,92,.1);border-left:3px solid var(--err);color:#FFC7C7}
.btn.is-loading{pointer-events:none;filter:saturate(.75)}
.btn.is-loading::before{content:"";width:14px;height:14px;border-radius:50%;border:2px solid rgba(6,18,14,.35);border-top-color:var(--text-inv);animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* footer */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:72px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand p{color:var(--text-3);font-size:14px;margin-top:14px;max-width:280px}
.footer-qr{margin-top:18px;width:96px;height:96px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.03);display:grid;place-items:center;color:var(--text-3);font-size:12px;text-align:center;padding:8px}
.footer-col h4{font-size:14px;margin-bottom:16px;color:var(--text)}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--text-3)}
.footer-col a:hover{color:var(--c-primary)}
.footer-bottom{margin-top:56px;border-top:1px solid var(--divider);padding:22px 0;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--text-3)}
.footer-bottom nav{display:flex;gap:18px;flex-wrap:wrap}
.footer-bottom nav a{color:var(--text-3)}

@media (max-width:1279px){
  .bento{grid-template-columns:repeat(3,1fr)}
  .bento-card--main{grid-column:span 3;grid-row:auto;flex-direction:row;align-items:stretch}
  .bento-card--main .bento-media{flex:0 0 46%}
  .bento-card--main .bento-media img{height:100%;aspect-ratio:auto}
  .bento-card--narrow{grid-column:span 3}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .hero{padding:56px 0 68px}
  .hero-grid{grid-template-columns:6fr 6fr;gap:32px}
  .metric-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .compare-grid{grid-template-columns:repeat(3,1fr);gap:14px}
  .compare-col{padding:20px}
  .contact-grid{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px}
  .nav-tabs a{padding:8px 12px;font-size:13px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .nav-wrap{gap:12px;min-height:64px}
  .nav-actions .btn--primary{display:none}
  .nav-burger{display:flex}
  .logo-text span{display:none}
  .hero-grid{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  .hero-cta .btn{width:100%;min-height:44px}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:16px}
  .metric-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .metric-num{font-size:30px}
  .bento{grid-template-columns:1fr}
  .bento-card--main,.bento-card--narrow{grid-column:span 1}
  .bento-card--main{flex-direction:column}
  .bento-card--main .bento-media img{aspect-ratio:16/9}
  .bento-card--narrow{flex-direction:column;align-items:flex-start}
  .compare-grid{grid-template-columns:1fr}
  .compare-col--best{transform:none}
  .news-grid{grid-template-columns:1fr}
  .faq-answer{padding-left:24px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:520px){
  .hero-stats{grid-template-columns:1fr 1fr}
  .metric-grid{grid-template-columns:1fr}
  .section-head{margin-bottom:28px}
  .form-card{padding:20px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}

/* roulang page: article */
:root{
  --c-primary:#12E1A5;
  --c-primary-ink:#06120E;
  --c-secondary:#6C4BFF;
  --c-accent:#FFC42E;
  --bg-base:#0A0C10;
  --bg-surface:#11151B;
  --bg-elevated:#171C24;
  --bg-deep:#07090C;
  --line:#232A34;
  --hair:rgba(255,255,255,.06);
  --t-1:#EAF0F4;
  --t-2:#93A1AE;
  --t-3:#5C6975;
  --ok:#2FD67A;
  --warn:#FFB020;
  --err:#FF5C5C;
  --paper:#F7F8FA;
  --paper-ink:#1B2027;
  --paper-2:#4A5560;
  --paper-line:#E3E6EA;
  --r-card:16px;
  --r-panel:20px;
  --r-btn:10px;
  --r-input:12px;
  --shadow:0 0 0 1px rgba(255,255,255,.06), 0 18px 40px -24px rgba(0,0,0,.85);
  --shadow-hover:0 0 0 1px rgba(18,225,165,.45), 0 0 26px -6px rgba(18,225,165,.45);
  --ease:220ms cubic-bezier(.22,.61,.36,1);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg-base);color:var(--t-1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.75;letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--c-primary);}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.25;letter-spacing:.005em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(18,225,165,.3);}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;}

/* ============ 顶栏 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,12,16,.82);
  backdrop-filter:saturate(140%) blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color var(--ease),background var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(10,12,16,.94);}
.nav-wrap{display:flex;align-items:center;gap:24px;min-height:72px;padding-top:10px;padding-bottom:10px;}
.logo{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;}
.logo-mark{
  width:38px;height:38px;border-radius:12px;flex:0 0 auto;
  display:grid;place-items:center;font-weight:800;font-size:18px;color:var(--c-primary-ink);
  background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));
}
.logo-text{display:flex;flex-direction:column;line-height:1.2;}
.logo-text strong{font-size:16px;font-weight:800;letter-spacing:0;white-space:nowrap;}
.logo-text span{font-size:12px;color:var(--t-3);letter-spacing:.02em;}
.nav-tabs{
  display:flex;align-items:center;gap:4px;margin-left:auto;
  padding:4px;border-radius:999px;background:rgba(255,255,255,.04);border:1px solid var(--hair);
  overflow-x:auto;scrollbar-width:none;
}
.nav-tabs::-webkit-scrollbar{display:none;}
.nav-tabs a{
  padding:8px 14px;border-radius:999px;font-size:14px;font-weight:600;color:var(--t-2);white-space:nowrap;
  transition:background var(--ease),color var(--ease);
}
.nav-tabs a:hover{background:rgba(255,255,255,.06);color:var(--t-1);}
.nav-tabs a[aria-current="page"]{background:var(--c-primary);color:var(--c-primary-ink);}
.nav-actions{display:flex;align-items:center;gap:14px;flex:0 0 auto;}
.nav-link-quiet{font-size:14px;color:var(--t-2);}
.nav-link-quiet:hover{color:var(--t-1);}
.nav-burger{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);position:relative;}
.nav-burger span,.nav-burger::before,.nav-burger::after{
  content:"";position:absolute;left:11px;width:20px;height:2px;border-radius:2px;background:var(--t-1);
  transition:transform var(--ease),opacity var(--ease);
}
.nav-burger span{top:20px;}
.nav-burger::before{top:14px;}
.nav-burger::after{top:26px;}
.nav-scrim{display:none;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);font-size:15px;font-weight:700;
  border:1px solid transparent;transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
  white-space:nowrap;
}
.btn--primary{background:var(--c-primary);color:var(--c-primary-ink);box-shadow:0 10px 26px -18px rgba(18,225,165,.9);}
.btn--primary:hover{color:var(--c-primary-ink);transform:translateY(-1px);box-shadow:0 14px 30px -16px rgba(18,225,165,.85);}
.btn--primary:active{transform:translateY(1px);}
.btn--ghost{background:rgba(255,255,255,.04);border-color:var(--line);color:var(--t-1);}
.btn--ghost:hover{border-color:rgba(18,225,165,.5);color:var(--t-1);}
.btn--sm{padding:9px 16px;font-size:14px;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--c-primary);}
.link-arrow::after{content:"›";font-size:17px;line-height:1;transition:transform var(--ease);}
.link-arrow:hover::after{transform:translateX(2px);}

/* ============ 徽章 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.06em;line-height:1.5;
  background:rgba(108,75,255,.16);color:#BFAEFF;border:1px solid rgba(108,75,255,.35);
}
.badge--mint{background:rgba(18,225,165,.14);color:var(--c-primary);border-color:rgba(18,225,165,.35);}
.badge--yellow{background:rgba(255,196,46,.14);color:var(--c-accent);border-color:rgba(255,196,46,.35);}

/* ============ 文章头部 ============ */
.art-hero{
  position:relative;overflow:hidden;
  padding:40px 0 44px;
  border-bottom:1px solid var(--hair);
  background:
    radial-gradient(900px 420px at 12% -10%,rgba(108,75,255,.16),transparent 65%),
    radial-gradient(700px 360px at 92% 0%,rgba(18,225,165,.12),transparent 60%),
    var(--bg-surface);
}
.art-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.05;
  background-image:linear-gradient(to right,#fff 1px,transparent 1px),linear-gradient(to bottom,#fff 1px,transparent 1px);
  background-size:24px 24px;
}
.art-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.22;
  background:url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
  mask-image:linear-gradient(90deg,transparent 40%,#000 100%);
  -webkit-mask-image:linear-gradient(90deg,transparent 40%,#000 100%);
}
.art-hero .container{position:relative;z-index:2;}
.breadcrumb{margin-bottom:22px;}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--t-3);}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px;max-width:100%;}
.breadcrumb li+li::before{content:"/";color:#3A424C;}
.breadcrumb a{color:var(--t-2);}
.breadcrumb a:hover{color:var(--c-primary);}
.crumb-current{color:var(--t-3);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:52vw;}
.art-head .badge{margin-bottom:16px;}
.art-head h1{
  font-size:clamp(26px,4.2vw,42px);line-height:1.22;max-width:900px;
  letter-spacing:.002em;
}
.art-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;margin-top:22px;
  padding-top:20px;border-top:1px solid var(--hair);font-size:13.5px;color:var(--t-2);
}
.art-meta time{font-variant-numeric:tabular-nums;}
.art-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--t-3);}
.meta-copy{
  margin-left:auto;display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.03);font-size:13px;color:var(--t-2);
  transition:border-color var(--ease),color var(--ease),background var(--ease);
}
.meta-copy:hover{border-color:rgba(18,225,165,.5);color:var(--t-1);}
.meta-copy.is-done{border-color:rgba(18,225,165,.6);color:var(--c-primary);}
.share-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;}
.share-row button{
  padding:8px 14px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.03);
  font-size:13px;color:var(--t-2);transition:all var(--ease);
}
.share-row button:hover{color:var(--t-1);border-color:rgba(18,225,165,.5);transform:translateY(-1px);}

/* ============ 正文阅读区 ============ */
.reading{padding:0 0 72px;background:var(--bg-base);}
.reading-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:40px;align-items:start;}
.reading-main{min-width:0;}
.reading-strip{
  height:4px;border-radius:999px;margin:0 0 28px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-secondary) 55%,rgba(18,225,165,.15));
}
.reading-canvas{
  max-width:820px;margin:0 auto;padding:44px 48px;
  background:var(--paper);color:var(--paper-ink);
  border-radius:var(--r-panel);border:1px solid var(--paper-line);
  box-shadow:0 26px 60px -34px rgba(0,0,0,.9);
}
.art-content{font-size:17.5px;line-height:1.9;color:var(--paper-ink);word-break:break-word;}
.art-content>*:first-child{margin-top:0;}
.art-content p{margin:0 0 1.05em;}
.art-content h2{
  font-size:24px;line-height:1.4;margin:2em 0 .8em;padding-left:14px;
  border-left:4px solid var(--c-primary);color:#141920;
}
.art-content h3{font-size:19px;line-height:1.5;margin:1.7em 0 .6em;color:#141920;}
.art-content h4{font-size:16.5px;margin:1.4em 0 .5em;color:#141920;}
.art-content ul,.art-content ol{margin:0 0 1.15em;padding-left:0;}
.art-content li{position:relative;padding-left:22px;margin-bottom:.5em;}
.art-content ul>li::before{
  content:"";position:absolute;left:2px;top:.75em;width:8px;height:8px;border-radius:2px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));
}
.art-content ol{counter-reset:item;}
.art-content ol>li{padding-left:28px;}
.art-content ol>li::before{
  counter-increment:item;content:counter(item);
  position:absolute;left:0;top:.18em;width:20px;height:20px;border-radius:6px;
  display:grid;place-items:center;font-size:12px;font-weight:700;color:var(--c-primary-ink);
  background:var(--c-primary);font-family:var(--mono);
}
.art-content blockquote{
  margin:1.4em 0;padding:16px 22px;border-left:4px solid var(--c-secondary);
  background:#EDF0F6;border-radius:0 12px 12px 0;color:#3A424C;font-size:16.5px;
}
.art-content blockquote p:last-child{margin-bottom:0;}
.art-content img{border-radius:12px;margin:1.5em auto;}
.art-content figure{margin:1.6em 0;}
.art-content figcaption{text-align:center;font-size:13.5px;color:var(--paper-2);margin-top:10px;}
.art-content a{color:#0E8F6E;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
.art-content a:hover{color:#0A7357;}
.art-content strong{font-weight:800;color:#141920;}
.art-content hr{border:0;border-top:1px solid var(--paper-line);margin:2em 0;}
.art-content table{
  width:100%;border-collapse:collapse;margin:1.5em 0;font-size:15.5px;
  border:1px solid var(--paper-line);border-radius:12px;overflow:hidden;
}
.art-content thead th{background:var(--c-primary);color:var(--c-primary-ink);font-weight:700;text-align:left;}
.art-content th,.art-content td{padding:11px 14px;border-bottom:1px solid var(--paper-line);}
.art-content tbody tr:nth-child(even){background:#EFF2F6;}
.art-content tbody tr:last-child td{border-bottom:0;}
.art-content code{
  font-family:var(--mono);font-size:14.5px;background:#E8ECF2;border:1px solid var(--paper-line);
  padding:2px 6px;border-radius:6px;color:#22303B;
}
.art-content pre{
  background:#141A21;color:#DCE6EE;padding:18px 20px;border-radius:12px;overflow-x:auto;
  font-family:var(--mono);font-size:14px;line-height:1.7;margin:1.5em 0;
}
.art-content pre code{background:none;border:0;padding:0;color:inherit;}

/* 空态 */
.empty-state{text-align:center;padding:34px 10px 18px;}
.empty-state .empty-ico{
  width:56px;height:56px;margin:0 auto 18px;border-radius:16px;display:grid;place-items:center;
  background:rgba(108,75,255,.12);border:1px solid rgba(108,75,255,.3);
}
.empty-state .empty-ico svg{width:26px;height:26px;stroke:#BFAEFF;}
.empty-state h2{font-size:22px;margin-bottom:12px;color:var(--paper-ink);}
.empty-state p{color:var(--paper-2);font-size:15.5px;margin-bottom:22px;}
.empty-state .btn{background:var(--c-primary);color:var(--c-primary-ink);}

/* ============ 标签 ============ */
.tag-block{max-width:820px;margin:28px auto 0;}
.tag-block h3{font-size:13px;letter-spacing:.1em;color:var(--t-3);font-weight:600;margin-bottom:12px;}
.tag-list{display:flex;flex-wrap:wrap;gap:10px;}
.tag-list a{
  padding:7px 14px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.03);
  font-size:13px;color:var(--t-2);transition:all var(--ease);
}
.tag-list a:hover{color:var(--c-primary);border-color:rgba(18,225,165,.5);transform:translateY(-1px);}

/* ============ 继续阅读 ============ */
.read-next{max-width:820px;margin:32px auto 0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.read-next a{
  display:block;padding:20px 22px;border-radius:var(--r-card);background:var(--bg-surface);
  border:1px solid var(--hair);box-shadow:var(--shadow);transition:all var(--ease);
}
.read-next a:hover{transform:translateY(-2px);border-color:rgba(18,225,165,.45);box-shadow:var(--shadow-hover);}
.read-next .rn-label{font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--t-3);}
.read-next .rn-title{display:block;margin-top:8px;font-size:16.5px;font-weight:700;color:var(--t-1);}
.read-next .rn-desc{display:block;margin-top:6px;font-size:13.5px;color:var(--t-2);}

/* ============ 相关分类卡片 ============ */
.related{max-width:820px;margin:44px auto 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:20px;}
.section-head h2{font-size:22px;}
.section-head p{font-size:13.5px;color:var(--t-3);}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.rel-card{
  display:flex;flex-direction:column;border-radius:var(--r-card);overflow:hidden;
  background:var(--bg-surface);border:1px solid var(--hair);box-shadow:var(--shadow);
  transition:all var(--ease);
}
.rel-card:hover{transform:translateY(-2px);border-color:rgba(18,225,165,.45);box-shadow:var(--shadow-hover);}
.rel-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-elevated);}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform var(--ease);}
.rel-card:hover .rel-thumb img{transform:scale(1.03);}
.rel-body{padding:18px 18px 20px;}
.rel-body h3{font-size:16px;line-height:1.45;margin-bottom:8px;}
.rel-body p{font-size:13.5px;color:var(--t-2);line-height:1.7;margin-bottom:12px;}
.back-home{max-width:820px;margin:32px auto 0;display:flex;flex-wrap:wrap;gap:12px;}

/* ============ 侧栏 ============ */
.reading-side{display:none;position:sticky;top:96px;flex-direction:column;gap:20px;min-width:0;}
.side-card{
  padding:20px 20px 22px;border-radius:var(--r-card);background:var(--bg-surface);
  border:1px solid var(--hair);box-shadow:var(--shadow);
}
.side-card h3{font-size:14px;letter-spacing:.06em;color:var(--t-1);margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-card h3::before{content:"";width:8px;height:8px;border-radius:2px;background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:280px;overflow:auto;}
.toc-list a{display:block;font-size:13.5px;color:var(--t-2);padding:7px 10px;border-radius:8px;border-left:2px solid transparent;}
.toc-list a:hover{background:rgba(255,255,255,.05);color:var(--t-1);border-left-color:var(--c-primary);}
.hot-list li+li{margin-top:12px;}
.hot-list a{display:flex;gap:10px;font-size:14px;color:var(--t-2);line-height:1.6;}
.hot-list a:hover{color:var(--c-primary);}
.hot-list .idx{font-family:var(--mono);font-size:12px;color:var(--c-accent);font-weight:700;padding-top:3px;}
.side-cta{background:linear-gradient(150deg,rgba(108,75,255,.22),rgba(18,225,165,.14));}
.side-cta p{font-size:13.5px;color:var(--t-2);margin:8px 0 16px;}
.side-cta .btn{width:100%;}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--hair);padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:32px;padding-bottom:44px;}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:13.5px;color:var(--t-2);line-height:1.8;max-width:320px;}
.footer-qr{
  margin-top:18px;width:132px;height:132px;border-radius:14px;border:1px dashed var(--line);
  display:grid;place-items:center;text-align:center;font-size:12.5px;color:var(--t-3);
  background:rgba(255,255,255,.02);line-height:1.6;padding:10px;
}
.footer-col h4{font-size:13px;letter-spacing:.08em;color:var(--t-1);margin-bottom:16px;font-weight:700;}
.footer-col li+li{margin-top:10px;}
.footer-col a{font-size:13.5px;color:var(--t-2);}
.footer-col a:hover{color:var(--c-primary);}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  padding:20px 0 28px;border-top:1px solid var(--hair);font-size:13px;color:var(--t-3);
}
.footer-bottom nav{display:flex;flex-wrap:wrap;gap:16px;}
.footer-bottom a{color:var(--t-3);}
.footer-bottom a:hover{color:var(--c-primary);}

/* ============ 响应式 ============ */
@media (min-width:1280px){
  .reading-layout{grid-template-columns:minmax(0,1fr) 300px;gap:44px;}
  .reading-side{display:flex;}
}
@media (max-width:1279px){
  .toc-block{display:none;}
}
@media (max-width:1023px){
  .container{padding:0 20px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .reading{padding-bottom:56px;}
  .nav-tabs{margin-left:auto;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .nav-wrap{min-height:64px;gap:12px;}
  .logo-text span{display:none;}
  .logo-text strong{font-size:15px;}
  .nav-burger{display:block;}
  .nav-link-quiet{display:none;}
  .nav-actions .btn{padding:9px 16px;font-size:14px;}
  .nav-tabs{
    position:fixed;top:0;right:0;bottom:0;width:min(300px,84vw);margin:0;z-index:80;
    flex-direction:column;align-items:stretch;gap:6px;padding:76px 16px 24px;border-radius:0;
    background:var(--bg-surface);border-left:1px solid var(--line);border-top:0;border-right:0;border-bottom:0;
    transform:translateX(102%);transition:transform 240ms cubic-bezier(.22,.61,.36,1);overflow-y:auto;
  }
  .site-header.nav-open .nav-tabs{transform:translateX(0);}
  .nav-tabs a{padding:12px 14px;border-radius:12px;font-size:15px;}
  .nav-scrim{
    display:block;position:fixed;inset:0;z-index:70;background:rgba(4,6,9,.66);
    opacity:0;pointer-events:none;transition:opacity var(--ease);
  }
  .site-header.nav-open .nav-scrim{opacity:1;pointer-events:auto;}
  .art-hero{padding:28px 0 32px;}
  .art-hero::after{opacity:.12;}
  .crumb-current{max-width:60vw;}
  .meta-copy{margin-left:0;}
  .reading-canvas{padding:24px 20px;border-radius:var(--r-card);}
  .art-content{font-size:16.5px;line-height:1.9;}
  .art-content h2{font-size:21px;}
  .read-next{grid-template-columns:minmax(0,1fr);}
  .related-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px;}
  .footer-qr{display:none;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .btn{width:100%;min-height:44px;}
  .nav-actions .btn,.meta-copy,.share-row button,.link-arrow{width:auto;}
  .back-home .btn{width:auto;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important;}
}

/* roulang page: category1 */
:root{
  --c-primary:#12E1A5;
  --c-secondary:#6C4BFF;
  --c-accent:#FFC42E;
  --bg-base:#0A0C10;
  --bg-surface:#11151B;
  --bg-elevated:#171C24;
  --bg-footer:#07090C;
  --line:#232A34;
  --divider:rgba(255,255,255,.06);
  --tx:#EAF0F4;
  --tx-2:#93A1AE;
  --tx-3:#5C6975;
  --tx-inv:#06120E;
  --ok:#2FD67A;
  --warn:#FFB020;
  --err:#FF5C5C;
  --r-card:16px;
  --r-panel:20px;
  --r-btn:10px;
  --r-input:12px;
  --shadow:0 0 0 1px rgba(255,255,255,.06),0 18px 40px -24px rgba(0,0,0,.85);
  --glow:0 0 26px -6px rgba(18,225,165,.45);
  --ease:200ms ease-out;
  --font:PingFang SC,"HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--tx);
  background:var(--bg-base);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:800;letter-spacing:.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
::selection{background:rgba(18,225,165,.3)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--surface{background:var(--bg-surface)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-head h2{font-size:clamp(24px,3vw,32px)}
.section-head p{color:var(--tx-2);font-size:15px;max-width:640px;margin-top:10px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--c-primary);text-transform:uppercase;margin-bottom:14px}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--c-primary);border-radius:2px}

/* 顶栏 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,12,16,.82);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color var(--ease),background var(--ease);
}
.site-header.is-stuck{border-bottom-color:var(--line);background:rgba(10,12,16,.95)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:72px}
.logo{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.logo-mark{
  width:40px;height:40px;border-radius:12px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));
  color:var(--tx-inv);display:grid;place-items:center;
  font-weight:800;font-size:19px;flex:0 0 auto;
}
.logo-text strong{display:block;font-size:15px;font-weight:700;line-height:1.3}
.logo-text span{display:block;font-size:12px;color:var(--tx-3);line-height:1.4}
.nav-tabs{display:flex;align-items:center;gap:4px;padding:4px;border-radius:999px;background:rgba(255,255,255,.04);overflow-x:auto;scrollbar-width:none}
.nav-tabs::-webkit-scrollbar{display:none}
.nav-tabs a{display:inline-block;padding:8px 16px;border-radius:999px;font-size:14px;color:var(--tx-2);white-space:nowrap;transition:background var(--ease),color var(--ease)}
.nav-tabs a:hover{color:var(--tx);background:rgba(255,255,255,.06)}
.nav-tabs a[aria-current="page"]{background:var(--c-primary);color:var(--tx-inv);font-weight:600}
.nav-actions{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.nav-link-quiet{font-size:14px;color:var(--tx-2);transition:color var(--ease)}
.nav-link-quiet:hover{color:var(--c-primary)}
.nav-burger{
  display:none;width:42px;height:42px;border-radius:12px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);cursor:pointer;
}
.nav-burger span{position:relative;display:block;width:18px;height:2px;margin:0 auto;background:var(--tx);border-radius:2px}
.nav-burger span::before,.nav-burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--tx);border-radius:2px}
.nav-burger span::before{top:-6px}
.nav-burger span::after{top:6px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
}
.btn--primary{background:var(--c-primary);color:var(--tx-inv)}
.btn--primary:hover{transform:translateY(-1px);box-shadow:var(--glow)}
.btn--primary:active{transform:translateY(1px);box-shadow:none}
.btn--ghost{background:rgba(255,255,255,.05);color:var(--tx);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-1px)}
.btn--ghost:active{transform:translateY(1px)}

/* 链接箭头 */
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:14px;font-weight:600;transition:color var(--ease)}
.link-arrow svg{transition:transform var(--ease)}
.link-arrow:hover svg{transform:translateX(3px)}

/* 分类页头部 */
.cat-hero{position:relative;padding:56px 0 36px;border-bottom:1px solid var(--divider);overflow:hidden}
.cat-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:24px 24px;
  mask-image:radial-gradient(120% 80% at 20% 0%,#000 0%,transparent 72%);
  -webkit-mask-image:radial-gradient(120% 80% at 20% 0%,#000 0%,transparent 72%);
}
.cat-hero__inner{position:relative;z-index:1}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--tx-3);margin-bottom:20px;flex-wrap:wrap}
.crumb a{color:var(--tx-2);transition:color var(--ease)}
.crumb a:hover{color:var(--c-primary)}
.crumb span{color:var(--tx-3)}
.cat-hero h1{font-size:clamp(28px,4vw,44px);max-width:900px;margin-bottom:18px}
.cat-hero h1 em{font-style:normal;color:var(--c-primary)}
.lede{font-size:17px;color:var(--tx-2);max-width:760px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}

/* 子分类切换带 */
.chip-band{display:flex;gap:10px;overflow-x:auto;padding:20px 0 6px;scrollbar-width:none;-ms-overflow-style:none}
.chip-band::-webkit-scrollbar{display:none}
.chip{
  flex:0 0 auto;padding:8px 18px;border-radius:999px;font-size:14px;
  border:1px solid var(--line);background:var(--bg-surface);color:var(--tx-2);
  transition:border-color var(--ease),color var(--ease),background var(--ease);
}
.chip:hover{border-color:var(--c-primary);color:var(--tx)}
.chip.is-active{background:var(--c-primary);border-color:transparent;color:var(--tx-inv);font-weight:600}

/* 分栏区 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split__text h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:18px}
.split__text p{color:var(--tx-2);font-size:15.5px;margin-bottom:16px}
.check-list li{display:flex;gap:10px;align-items:flex-start;color:var(--tx-2);font-size:15px;margin-bottom:10px}
.check-list svg{flex:0 0 auto;margin-top:5px;color:var(--c-primary)}
.split__media{position:relative;border-radius:var(--r-panel);overflow:hidden;aspect-ratio:16/11;box-shadow:var(--shadow)}
.split__media img{width:100%;height:100%;object-fit:cover}
.split__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,12,16,.05) 35%,rgba(10,12,16,.8) 100%)}
.media-badge{
  position:absolute;right:16px;bottom:16px;z-index:2;
  background:rgba(10,12,16,.82);border:1px solid var(--line);border-radius:14px;
  padding:12px 18px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  display:flex;gap:20px;
}
.media-badge b{display:block;font-size:18px;color:var(--c-primary);font-variant-numeric:tabular-nums;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.media-badge span{font-size:12px;color:var(--tx-3)}

/* 要点概览 */
.points{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.point{
  background:var(--bg-surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.point:hover{border-color:rgba(18,225,165,.45);box-shadow:var(--glow);transform:translateY(-2px)}
.point__no{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;color:var(--c-primary);letter-spacing:.08em;display:block;margin-bottom:14px}
.point h3{font-size:17px;margin-bottom:10px}
.point p{font-size:14.5px;color:var(--tx-2)}

/* 卡片网格 */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--bg-surface);border:1px solid var(--line);border-radius:var(--r-card);
  transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.card:hover{border-color:rgba(18,225,165,.45);box-shadow:var(--glow);transform:translateY(-2px)}
.card__media{aspect-ratio:16/9;overflow:hidden;background:var(--bg-elevated)}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform 400ms ease-out}
.card:hover .card__media img{transform:scale(1.03)}
.card__body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.card__body h3{font-size:19px}
.card__body p{font-size:14.5px;color:var(--tx-2);flex:1}
.tag{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.06em;
  padding:4px 12px;border-radius:999px;background:rgba(108,75,255,.18);color:#B9A8FF;
}
.tag--mint{background:rgba(18,225,165,.14);color:var(--c-primary)}
.tag--warn{background:rgba(255,196,46,.16);color:var(--c-accent)}

/* 内链区 */
.cross{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cross-card{
  display:flex;flex-direction:column;gap:12px;
  padding:28px;border-radius:var(--r-card);
  background:var(--bg-elevated);border:1px solid var(--line);
  transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.cross-card:hover{border-color:var(--c-primary);box-shadow:var(--glow);transform:translateY(-2px)}
.cross-card h3{font-size:19px}
.cross-card p{font-size:14.5px;color:var(--tx-2);flex:1}

/* FAQ */
.faq{display:flex;flex-direction:column;gap:12px}
.faq details{
  position:relative;overflow:hidden;
  background:var(--bg-surface);border:1px solid var(--line);border-radius:14px;
  transition:border-color var(--ease),background var(--ease);
}
.faq details:hover{border-color:rgba(18,225,165,.32)}
.faq details[open]{border-color:rgba(18,225,165,.5);background:var(--bg-elevated)}
.faq details[open]::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--c-primary)}
.faq summary{
  list-style:none;cursor:pointer;position:relative;
  padding:18px 56px 18px 22px;font-size:16px;font-weight:600;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
  font-size:22px;line-height:1;color:var(--c-primary);transition:transform var(--ease);
}
.faq details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq__body{padding:0 22px 20px;font-size:15px;color:var(--tx-2);border-top:1px solid var(--divider);margin-top:2px;padding-top:16px}

/* CTA 条 */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:40px;border-radius:var(--r-panel);border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(18,225,165,.14),rgba(108,75,255,.2));
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:10px}
.cta-band p{color:var(--tx-2);font-size:15px;max-width:620px}
.cta-band__actions{display:flex;gap:14px;flex-wrap:wrap}

/* 页脚 */
.site-footer{background:var(--bg-footer);border-top:1px solid var(--divider);padding:72px 0 0;color:var(--tx-2)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand p{font-size:14px;color:var(--tx-3);margin:18px 0}
.footer-qr{
  width:112px;height:112px;border-radius:12px;border:1px dashed var(--line);
  display:grid;place-items:center;text-align:center;font-size:12px;color:var(--tx-3);
  background:rgba(255,255,255,.02);line-height:1.6;
}
.footer-col h4{font-size:14px;color:var(--tx);margin-bottom:16px;font-weight:700}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--tx-3);transition:color var(--ease)}
.footer-col a:hover{color:var(--c-primary)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--divider);padding:22px 0 30px;
}
.footer-bottom span{font-size:13px;color:var(--tx-3)}
.footer-bottom nav{display:flex;gap:18px;flex-wrap:wrap}
.footer-bottom nav a{font-size:13px;color:var(--tx-3);transition:color var(--ease)}
.footer-bottom nav a:hover{color:var(--c-primary)}

/* 移动端抽屉 */
.scrim{position:fixed;inset:0;background:rgba(0,0,0,.62);opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);z-index:70}
.scrim.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,84vw);
  background:var(--bg-elevated);border-left:1px solid var(--line);
  padding:24px;z-index:80;display:flex;flex-direction:column;gap:6px;
  transform:translateX(100%);transition:transform 240ms ease-out;
}
.drawer.is-open{transform:translateX(0)}
.drawer h4{font-size:13px;color:var(--tx-3);letter-spacing:.06em;margin:8px 0 10px}
.drawer a{padding:12px 14px;border-radius:10px;font-size:15px;color:var(--tx-2);transition:background var(--ease),color var(--ease)}
.drawer a:hover{background:rgba(255,255,255,.05);color:var(--tx)}
.drawer a.is-active{background:var(--c-primary);color:var(--tx-inv);font-weight:600}
.drawer .btn{margin-top:18px}

@media (max-width:1024px){
  .points{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .cross{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .nav-tabs{display:none}
  .nav-burger{display:block}
  .nav-link-quiet{display:none}
  .split{grid-template-columns:1fr;gap:32px}
  .grid-3{grid-template-columns:1fr}
  .cross{grid-template-columns:1fr}
  .cat-hero{padding:40px 0 28px}
  .hero-actions .btn,.cta-band__actions .btn{width:100%;min-height:44px}
  .cta-band{padding:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .logo-text span{display:none}
  .points{grid-template-columns:1fr}
  .card__body{padding:20px}
  .point{padding:20px}
  .media-badge{right:12px;bottom:12px;padding:10px 14px;gap:14px}
  .footer-grid{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
}

/* roulang page: category2 */
/* ===== 设计令牌 ===== */
:root{
  --c-primary:#12E1A5;
  --c-secondary:#6C4BFF;
  --c-accent:#FFC42E;
  --bg-base:#0A0C10;
  --bg-surface:#11151B;
  --bg-elevated:#171C24;
  --bg-deep:#07090C;
  --line:#232A34;
  --divider:rgba(255,255,255,.06);
  --text:#EAF0F4;
  --text-2:#93A1AE;
  --text-3:#5C6975;
  --inverse:#06120E;
  --ok:#2FD67A;
  --warn:#FFB020;
  --err:#FF5C5C;
  --r-card:16px;
  --r-panel:20px;
  --r-btn:10px;
  --r-input:12px;
  --r-pill:999px;
  --shadow:0 0 0 1px rgba(255,255,255,.06), 0 18px 40px -24px rgba(0,0,0,.85);
  --shadow-hover:0 0 0 1px rgba(18,225,165,.55), 0 0 26px -6px rgba(18,225,165,.45), 0 18px 40px -24px rgba(0,0,0,.9);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px; --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:96px;
  --t:220ms cubic-bezier(.22,.61,.36,1);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
/* ===== 基础重置 ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg-base);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.nav-open::after{
  content:"";position:fixed;inset:0;background:rgba(4,6,9,.62);
  backdrop-filter:blur(2px);z-index:55;
}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:.005em}
h1{font-size:clamp(28px,4.2vw,44px);font-weight:800;letter-spacing:.008em}
h2{font-size:clamp(22px,2.6vw,32px)}
h3{font-size:clamp(17px,1.6vw,20px)}
h4{font-size:16px}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color var(--t),opacity var(--t)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}
/* ===== 容器与栅格 ===== */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0;position:relative}
.section--surface{background:var(--bg-surface)}
.section--tight{padding:72px 0}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:var(--sp-5);margin-bottom:var(--sp-7)}
.sec-head__text{max-width:660px}
.sec-head h2{margin-bottom:var(--sp-3)}
.sec-head p{color:var(--text-2);font-size:15px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.06em;
  color:var(--c-primary);text-transform:uppercase;
  padding:6px 12px;border-radius:var(--r-pill);
  background:rgba(18,225,165,.1);border:1px solid rgba(18,225,165,.28);
  margin-bottom:var(--sp-4);
}
.tag{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.04em;
  padding:4px 10px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.06);color:var(--text-2);border:1px solid var(--line);
}
.tag--accent{background:rgba(255,196,46,.14);color:var(--c-accent);border-color:rgba(255,196,46,.3)}
.tag--violet{background:rgba(108,75,255,.16);color:#B9A7FF;border-color:rgba(108,75,255,.34)}
/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  border:1px solid transparent;transition:transform var(--t),box-shadow var(--t),background var(--t),color var(--t),border-color var(--t);
}
.btn--primary{background:var(--c-primary);color:var(--inverse);box-shadow:0 10px 26px -14px rgba(18,225,165,.9)}
.btn--primary:hover{transform:translateY(-1px);box-shadow:0 0 26px -6px rgba(18,225,165,.6),0 12px 26px -14px rgba(18,225,165,.9)}
.btn--primary:active{transform:translateY(1px);box-shadow:none}
.btn--ghost{background:rgba(255,255,255,.04);border-color:var(--line);color:var(--text)}
.btn--ghost:hover{border-color:rgba(18,225,165,.5);color:var(--c-primary);background:rgba(18,225,165,.08);transform:translateY(-1px)}
.btn--ghost:active{transform:translateY(1px)}
.btn--sm{min-height:38px;padding:0 16px;font-size:14px}
.btn[disabled]{opacity:.5;cursor:not-allowed;filter:saturate(.5)}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--c-primary);
}
.link-arrow::after{content:"";width:6px;height:6px;border-top:2px solid currentColor;border-right:2px solid currentColor;transform:rotate(45deg);transition:transform var(--t)}
.link-arrow:hover::after{transform:rotate(45deg) translate(2px,-2px)}
.link-arrow:hover{color:#4FF0C0}
/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(10,12,16,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color var(--t),background var(--t),box-shadow var(--t);
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(10,12,16,.92);box-shadow:0 14px 30px -26px rgba(0,0,0,.95)}
.nav-wrap{display:flex;align-items:center;gap:var(--sp-5);height:74px}
.logo{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.logo-mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  display:grid;place-items:center;
  font-size:18px;font-weight:800;color:var(--inverse);
  background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-secondary) 100%);
  box-shadow:0 8px 20px -12px rgba(108,75,255,.9);
}
.logo-text{display:flex;flex-direction:column;line-height:1.24}
.logo-text strong{font-size:16px;font-weight:800;color:var(--text);white-space:nowrap}
.logo-text span{font-size:12px;color:var(--text-3);white-space:nowrap}
.nav-tabs{
  display:flex;align-items:center;gap:4px;
  padding:4px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  margin:0 auto;min-width:0;
}
.nav-tabs a{
  display:block;padding:9px 15px;border-radius:var(--r-pill);
  font-size:14px;font-weight:500;color:var(--text-2);white-space:nowrap;
}
.nav-tabs a:hover{color:var(--text);background:rgba(255,255,255,.07)}
.nav-tabs a[aria-current="page"]{background:var(--c-primary);color:var(--inverse);font-weight:700}
.nav-tabs a[aria-current="page"]:hover{background:var(--c-primary);color:var(--inverse)}
.nav-actions{display:flex;align-items:center;gap:var(--sp-3);flex:0 0 auto}
.nav-link-quiet{font-size:14px;color:var(--text-2)}
.nav-link-quiet:hover{color:var(--c-primary)}
.nav-burger{
  display:none;width:42px;height:42px;border-radius:11px;
  border:1px solid var(--line);background:rgba(255,255,255,.04);
  position:relative;
}
.nav-burger span,.nav-burger span::before,.nav-burger span::after{
  content:"";position:absolute;left:50%;width:18px;height:2px;border-radius:2px;background:var(--text);
  transform:translateX(-50%);transition:transform var(--t),opacity var(--t);
}
.nav-burger span{top:50%;margin-top:-1px}
.nav-burger span::before{top:-6px;left:0;transform:none}
.nav-burger span::after{top:6px;left:0;transform:none}
body.nav-open .nav-burger span{background:transparent}
body.nav-open .nav-burger span::before{transform:rotate(45deg);top:0}
body.nav-open .nav-burger span::after{transform:rotate(-45deg);top:0}
/* ===== 首屏 Banner ===== */
.banner{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.banner-media{position:absolute;inset:0;background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat}
.banner-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(10,12,16,.96) 0%,rgba(10,12,16,.84) 46%,rgba(10,12,16,.52) 100%);
}
.banner::before{
  content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:24px 24px;
  opacity:.9;
}
.banner-inner{position:relative;z-index:3;padding:64px 0 68px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:var(--sp-5)}
.crumbs a{color:var(--text-2)}
.crumbs a:hover{color:var(--c-primary)}
.crumbs span[aria-current]{color:var(--text-3)}
.crumbs i{font-style:normal;color:var(--text-3);opacity:.7}
.banner h1{max-width:760px;margin-bottom:var(--sp-4)}
.banner h1 em{font-style:normal;color:var(--c-primary)}
.banner-sub{max-width:620px;color:var(--text-2);font-size:17px;margin-bottom:var(--sp-6)}
.banner-cta{display:flex;flex-wrap:wrap;gap:var(--sp-3);margin-bottom:var(--sp-8)}
.trust-row{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--sp-4);
  max-width:760px;padding-top:var(--sp-5);border-top:1px solid var(--divider);
}
.trust-row div strong{
  display:block;font-size:clamp(20px,2.4vw,26px);font-weight:800;color:var(--c-primary);
  font-variant-numeric:tabular-nums;line-height:1.2;
}
.trust-row div span{font-size:13px;color:var(--text-3)}
/* ===== 双列大卡片 ===== */
.split{
  display:grid;grid-template-columns:1.05fr 1fr;gap:var(--sp-7);align-items:center;
  background:var(--bg-surface);border:1px solid var(--line);border-radius:var(--r-panel);
  padding:var(--sp-6);box-shadow:var(--shadow);transition:box-shadow var(--t),border-color var(--t);
}
.split + .split{margin-top:var(--sp-6)}
.split:hover{box-shadow:var(--shadow-hover);border-color:rgba(18,225,165,.35)}
.split.is-reverse .split-media{order:2}
.split-media{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);background:var(--bg-elevated)}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform var(--t)}
.split:hover .split-media img{transform:scale(1.03)}
.split-body h3{margin-bottom:var(--sp-3)}
.split-body > p{color:var(--text-2);font-size:15px;margin-bottom:var(--sp-5)}
.check-list{display:grid;gap:10px;margin-bottom:var(--sp-5)}
.check-list li{display:flex;gap:10px;font-size:14.5px;color:var(--text-2);line-height:1.7}
.check-list li::before{
  content:"";flex:0 0 auto;width:16px;height:16px;margin-top:5px;border-radius:5px;
  background:rgba(18,225,165,.16);
  background-image:linear-gradient(135deg,var(--c-primary),var(--c-secondary));
  box-shadow:inset 0 0 0 4px rgba(10,12,16,.85);
}
.check-list strong{color:var(--text);font-weight:600}
/* ===== 时间轴步骤 ===== */
.timeline{position:relative;display:grid;gap:var(--sp-5);padding-left:34px}
.timeline::before{
  content:"";position:absolute;left:11px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(180deg,var(--c-primary),rgba(108,75,255,.65) 65%,rgba(108,75,255,0));
}
.timeline .step{position:relative;background:var(--bg-surface);border:1px solid var(--line);border-radius:var(--r-card);padding:var(--sp-5);transition:border-color var(--t),box-shadow var(--t),transform var(--t)}
.timeline .step:hover{border-color:rgba(18,225,165,.4);box-shadow:var(--shadow-hover);transform:translateX(2px)}
.timeline .step::before{
  content:"";position:absolute;left:-30px;top:26px;width:12px;height:12px;border-radius:50%;
  background:var(--c-primary);box-shadow:0 0 0 4px rgba(18,225,165,.16);
}
.step-no{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.06em;color:var(--c-accent);margin-bottom:8px;font-variant-numeric:tabular-nums}
.timeline .step h3{font-size:17px;margin-bottom:8px}
.timeline .step p{color:var(--text-2);font-size:14.5px}
/* ===== 对比条 ===== */
.compare{display:grid;gap:var(--sp-5)}
.compare-row{background:var(--bg-surface);border:1px solid var(--line);border-radius:var(--r-card);padding:var(--sp-5)}
.compare-row__top{display:flex;align-items:baseline;justify-content:space-between;gap:var(--sp-4);margin-bottom:var(--sp-4)}
.compare-row__top h3{font-size:16px}
.compare-row__delta{font-size:13px;font-weight:700;color:var(--c-primary);font-variant-numeric:tabular-nums}
.bar-group{display:grid;gap:10px}
.bar-line{display:grid;grid-template-columns:76px 1fr 62px;align-items:center;gap:var(--sp-3)}
.bar-line span:first-child{font-size:13px;color:var(--text-3)}
.bar-track{height:8px;border-radius:var(--r-pill);background:rgba(255,255,255,.06);overflow:hidden}
.bar-fill{height:100%;border-radius:var(--r-pill);background:rgba(255,255,255,.22)}
.bar-fill--after{background:linear-gradient(90deg,var(--c-primary),var(--c-secondary))}
.bar-line b{font-size:14px;text-align:right;font-variant-numeric:tabular-nums;color:var(--text)}
.bar-line b.after{color:var(--c-primary)}
.note{font-size:13px;color:var(--text-3);margin-top:var(--sp-5)}
/* ===== 内链卡片 ===== */
.link-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-5)}
.link-card{
  display:flex;flex-direction:column;
  background:var(--bg-surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow);transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.link-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(18,225,165,.4)}
.link-card img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform var(--t)}
.link-card:hover img{transform:scale(1.03)}
.link-card__body{padding:var(--sp-5);display:flex;flex-direction:column;gap:10px;flex:1}
.link-card__body h3{font-size:17px}
.link-card__body p{font-size:14px;color:var(--text-2)}
.link-card__body .link-arrow{margin-top:auto}
/* ===== FAQ ===== */
.faq{display:grid;gap:12px;max-width:900px}
.faq details{
  background:var(--bg-surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:0;overflow:hidden;transition:border-color var(--t),background var(--t);
}
.faq details:hover{border-color:rgba(18,225,165,.35)}
.faq details[open]{border-left:3px solid var(--c-primary);background:var(--bg-elevated)}
.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:12px;
  padding:18px var(--sp-5);font-size:16px;font-weight:600;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{
  content:"?";flex:0 0 auto;width:24px;height:24px;border-radius:8px;
  display:grid;place-items:center;font-size:13px;font-weight:800;
  background:rgba(108,75,255,.18);color:#B9A7FF;
}
.faq summary::after{
  content:"";margin-left:auto;flex:0 0 auto;width:12px;height:12px;
  border-left:2px solid var(--text-2);border-bottom:2px solid var(--text-2);
  transform:rotate(-45deg) translate(2px,-2px);transition:transform var(--t),border-color var(--t);
}
.faq details[open] summary::after{transform:rotate(135deg) translate(-2px,-2px);border-color:var(--c-primary)}
.faq details p{padding:0 var(--sp-5) 20px 62px;color:var(--text-2);font-size:14.5px}
/* ===== 底部 CTA ===== */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-panel);
  border:1px solid rgba(18,225,165,.28);
  background:linear-gradient(120deg,rgba(18,225,165,.14),rgba(108,75,255,.18)),var(--bg-surface);
  padding:var(--sp-7);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:var(--sp-5);
}
.cta-band h2{font-size:clamp(20px,2.4vw,28px);margin-bottom:8px}
.cta-band p{color:var(--text-2);font-size:15px;max-width:640px}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:12px}
/* ===== 页脚 ===== */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:var(--sp-6)}
.footer-brand p{color:var(--text-3);font-size:13.5px;margin:var(--sp-4) 0 var(--sp-5);max-width:320px}
.footer-qr{
  width:112px;height:112px;border-radius:14px;border:1px dashed var(--line);
  background:repeating-linear-gradient(45deg,rgba(255,255,255,.03) 0 6px,transparent 6px 12px);
  display:grid;place-items:center;text-align:center;font-size:12px;color:var(--text-3);line-height:1.6;
}
.footer-col h4{font-size:14px;margin-bottom:var(--sp-4);color:var(--text)}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:13.5px;color:var(--text-3)}
.footer-col a:hover{color:var(--c-primary)}
.footer-bottom{
  margin-top:var(--sp-8);border-top:1px solid var(--divider);
  padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:var(--sp-4);
  align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);
}
.footer-bottom nav{display:flex;flex-wrap:wrap;gap:16px}
.footer-bottom a{color:var(--text-3)}
.footer-bottom a:hover{color:var(--c-primary)}
/* ===== 响应式 ===== */
@media (max-width:1279px){
  .section{padding:80px 0}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .split{grid-template-columns:1fr;gap:var(--sp-5)}
  .split.is-reverse .split-media{order:0}
  .link-cards{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr 1fr}
  .trust-row{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:860px){
  .nav-wrap{height:66px;gap:var(--sp-4)}
  .nav-tabs{
    position:fixed;top:0;right:0;z-index:60;height:100dvh;width:min(320px,86vw);
    flex-direction:column;align-items:stretch;gap:8px;
    padding:92px 20px 28px;margin:0;border-radius:0;
    border:0;border-left:1px solid var(--line);
    background:var(--bg-elevated);
    transform:translateX(102%);transition:transform 240ms ease-out;
    overflow-y:auto;
  }
  .nav-tabs.is-open{transform:translateX(0)}
  .nav-tabs a{padding:13px 16px;font-size:15px;border-radius:12px}
  .nav-burger{display:block}
  .nav-link-quiet{display:none}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .section--tight{padding:48px 0}
  .banner-inner{padding:44px 0 52px}
  .banner-sub{font-size:15.5px}
  .banner-cta .btn{width:100%}
  .sec-head{margin-bottom:var(--sp-6)}
  .split{padding:var(--sp-5)}
  .link-cards{grid-template-columns:1fr}
  .timeline{padding-left:26px}
  .timeline .step::before{left:-23px}
  .bar-line{grid-template-columns:64px 1fr 56px}
  .cta-band{padding:var(--sp-5)}
  .cta-band__actions{width:100%}
  .cta-band__actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:var(--sp-5)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .logo-text span{display:none}
  .trust-row{grid-template-columns:1fr 1fr;gap:var(--sp-3)}
  .compare-row{padding:var(--sp-4)}
  .faq summary{padding:16px}
  .faq details p{padding:0 16px 18px 52px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category3 */
:root{
  --c-primary:#12E1A5;
  --c-secondary:#6C4BFF;
  --c-accent:#FFC42E;
  --bg-base:#0A0C10;
  --bg-surface:#11151B;
  --bg-elevated:#171C24;
  --bg-footer:#07090C;
  --line:#232A34;
  --divider:rgba(255,255,255,.06);
  --t-primary:#EAF0F4;
  --t-second:#93A1AE;
  --t-weak:#5C6975;
  --t-invert:#06120E;
  --ok:#2FD67A;
  --warn:#FFB020;
  --err:#FF5C5C;
  --r-card:16px;
  --r-panel:20px;
  --r-btn:10px;
  --r-chip:999px;
  --r-input:12px;
  --shadow-1:0 0 0 1px rgba(255,255,255,.06),0 18px 40px -24px rgba(0,0,0,.85);
  --shadow-hover:0 0 0 1px rgba(18,225,165,.5),0 0 26px -6px rgba(18,225,165,.42),0 18px 40px -24px rgba(0,0,0,.9);
  --ease:180ms ease-out;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg-base);color:var(--t-primary);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.75;overflow-x:hidden;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.25;letter-spacing:.01em;}
h1{font-size:clamp(28px,3.6vw,40px);}
h2{font-size:clamp(24px,2.6vw,32px);}
h3{font-size:19px;font-weight:700;}
h4{font-size:16px;font-weight:700;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:8px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--surface{background:var(--bg-surface);}
.section--tight{padding:72px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:32px;}
.section-head p{color:var(--t-second);font-size:15px;margin-top:10px;max-width:640px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--r-chip);
  background:rgba(108,75,255,.14);border:1px solid rgba(108,75,255,.35);
  color:#C3B4FF;font-size:12px;font-weight:600;letter-spacing:.06em;
}
.eyebrow--primary{background:rgba(18,225,165,.12);border-color:rgba(18,225,165,.35);color:#7CF0CC;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:700;white-space:nowrap;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
}
.btn--primary{background:var(--c-primary);color:var(--t-invert);box-shadow:0 12px 26px -16px rgba(18,225,165,.9);}
.btn--primary:hover{transform:translateY(-1px);box-shadow:0 0 26px -6px rgba(18,225,165,.6);}
.btn--primary:active{transform:translateY(1px);}
.btn--ghost{background:rgba(255,255,255,.04);border-color:var(--line);color:var(--t-primary);}
.btn--ghost:hover{border-color:rgba(18,225,165,.5);color:var(--c-primary);transform:translateY(-1px);}
.btn--sm{height:40px;padding:0 16px;font-size:14px;}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary);transition:color var(--ease);}
.text-link::after{content:"→";transition:transform var(--ease);}
.text-link:hover::after{transform:translateX(3px);}

/* ============ 顶栏 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,12,16,.9);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color var(--ease),background var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(10,12,16,.96);}
.nav-wrap{display:flex;align-items:center;gap:20px;min-height:74px;}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));
  color:var(--t-invert);font-weight:800;font-size:19px;flex-shrink:0;
}
.logo-text{display:flex;flex-direction:column;line-height:1.2;}
.logo-text strong{font-size:15px;font-weight:800;white-space:nowrap;}
.logo-text span{font-size:11px;color:var(--t-weak);white-space:nowrap;}
.nav-tabs{
  display:flex;align-items:center;gap:4px;margin-left:auto;
  padding:4px;border-radius:var(--r-chip);
  background:rgba(255,255,255,.04);border:1px solid var(--divider);
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
}
.nav-tabs::-webkit-scrollbar{display:none;}
.nav-tabs a{
  padding:9px 16px;border-radius:var(--r-chip);font-size:14px;color:var(--t-second);
  white-space:nowrap;transition:background var(--ease),color var(--ease);
}
.nav-tabs a:hover{color:var(--t-primary);background:rgba(255,255,255,.07);}
.nav-tabs a[aria-current="page"]{background:var(--c-primary);color:var(--t-invert);font-weight:700;}
.nav-actions{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.nav-link-quiet{font-size:14px;color:var(--t-second);transition:color var(--ease);}
.nav-link-quiet:hover{color:var(--c-primary);}
.nav-burger{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);position:relative;flex-shrink:0;
}
.nav-burger span,.nav-burger span::before,.nav-burger span::after{
  content:"";position:absolute;left:50%;width:18px;height:2px;border-radius:2px;background:var(--t-primary);
  transform:translateX(-50%);transition:transform var(--ease),opacity var(--ease);
}
.nav-burger span{top:50%;margin-top:-1px;}
.nav-burger span::before{top:-6px;}
.nav-burger span::after{top:6px;}
.nav-burger[aria-expanded="true"] span{background:transparent;}
.nav-burger[aria-expanded="true"] span::before{transform:translateX(-50%) translateY(6px) rotate(45deg);}
.nav-burger[aria-expanded="true"] span::after{transform:translateX(-50%) translateY(-6px) rotate(-45deg);}

/* ============ 窄头 ============ */
.page-head{padding:56px 0 36px;border-bottom:1px solid var(--divider);background:
  radial-gradient(900px 320px at 12% -30%,rgba(18,225,165,.14),transparent 62%),
  radial-gradient(700px 300px at 88% 0%,rgba(108,75,255,.16),transparent 60%);
}
.page-head-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.page-head h1{max-width:720px;}
.page-head .sub{margin-top:12px;color:var(--t-second);font-size:16px;max-width:620px;}
.page-head .eyebrow{margin-bottom:16px;}
.head-cta{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ Bento ============ */
.bento{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:start;}
.b-item{
  background:var(--bg-surface);border-radius:var(--r-card);padding:24px;
  box-shadow:var(--shadow-1);border:1px solid transparent;
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.b-item:hover{box-shadow:var(--shadow-hover);border-color:rgba(18,225,165,.35);transform:translateY(-2px);}
.b-item--wide{grid-column:span 2;}
.b-item--tall{grid-row:span 2;}
.b-item__num{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;font-weight:700;
  color:var(--c-primary);letter-spacing:.1em;
}
.b-item h3{margin-top:12px;}
.b-item p{margin-top:10px;color:var(--t-second);font-size:14.5px;}
.b-item__list{margin-top:16px;display:grid;gap:8px;}
.b-item__list li{display:flex;gap:10px;font-size:14px;color:var(--t-second);}
.b-item__list li::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--c-primary);margin-top:9px;flex-shrink:0;}
.b-media{position:relative;border-radius:var(--r-card);overflow:hidden;margin-bottom:18px;}
.b-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform var(--ease);}
.b-item:hover .b-media img{transform:scale(1.03);}
.b-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,12,16,.05),rgba(10,12,16,.72));}
.b-metrics{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:18px;}
.b-metric strong{
  display:block;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:34px;font-weight:800;color:var(--c-primary);line-height:1.1;
}
.b-metric span{font-size:13px;color:var(--t-weak);}
.b-badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:var(--r-chip);
  font-size:12px;font-weight:600;background:rgba(255,196,46,.14);color:#FFD87A;border:1px solid rgba(255,196,46,.3);
}
.b-badge--ok{background:rgba(47,214,122,.14);color:#7FEAAF;border-color:rgba(47,214,122,.3);}
.b-badge--purple{background:rgba(108,75,255,.16);color:#BFB0FF;border-color:rgba(108,75,255,.32);}
.b-progress{height:6px;border-radius:999px;background:rgba(255,255,255,.06);margin-top:18px;overflow:hidden;}
.b-progress i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--c-primary),var(--c-secondary));}

/* ============ 标签横滚 ============ */
.tagline-wrap{margin-top:8px;}
.tagline{
  display:flex;gap:12px;overflow-x:auto;padding:6px 0 14px;scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.tagline::-webkit-scrollbar{display:none;}
.tagline a{
  flex:0 0 auto;padding:9px 16px;border-radius:var(--r-chip);font-size:14px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--t-second);
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.tagline a:hover{color:var(--t-primary);border-color:rgba(18,225,165,.45);background:rgba(18,225,165,.08);}

/* ============ 对比条 ============ */
.compare{display:grid;gap:20px;}
.compare-group{background:var(--bg-surface);border-radius:var(--r-card);padding:24px;box-shadow:var(--shadow-1);}
.compare-group header{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:20px;}
.compare-group h3{font-size:18px;}
.compare-row{display:grid;gap:10px;padding:14px 0;border-top:1px solid var(--divider);}
.compare-row:first-of-type{border-top:0;padding-top:0;}
.compare-row .row-head{display:flex;justify-content:space-between;gap:12px;font-size:14px;color:var(--t-second);}
.compare-row .row-head b{color:var(--t-primary);font-weight:600;}
.bar{height:8px;border-radius:999px;background:rgba(255,255,255,.06);overflow:hidden;}
.bar i{display:block;height:100%;border-radius:999px;}
.bar--before i{background:linear-gradient(90deg,#3C4654,#5C6975);}
.bar--after i{background:linear-gradient(90deg,var(--c-primary),var(--c-secondary));}
.compare-note{font-size:13px;color:var(--t-weak);margin-top:18px;}
.legend{display:flex;gap:18px;font-size:13px;color:var(--t-weak);flex-wrap:wrap;}
.legend span{display:inline-flex;align-items:center;gap:8px;}
.legend i{width:14px;height:6px;border-radius:999px;display:inline-block;}
.legend .lg-before{background:#4B5563;}
.legend .lg-after{background:linear-gradient(90deg,var(--c-primary),var(--c-secondary));}

/* ============ 内链卡 ============ */
.link-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.link-card{
  display:flex;flex-direction:column;gap:10px;padding:24px;border-radius:var(--r-card);
  background:var(--bg-elevated);border:1px solid var(--line);
  transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.link-card:hover{border-color:rgba(18,225,165,.45);box-shadow:0 0 26px -10px rgba(18,225,165,.45);transform:translateY(-2px);}
.link-card small{font-size:12px;letter-spacing:.06em;color:var(--t-weak);font-weight:600;}
.link-card h3{font-size:18px;}
.link-card p{font-size:14px;color:var(--t-second);}

/* ============ FAQ ============ */
.faq{display:grid;gap:12px;}
.faq details{
  background:var(--bg-surface);border-radius:var(--r-card);border-left:3px solid transparent;
  box-shadow:var(--shadow-1);transition:border-color var(--ease),background var(--ease);
}
.faq details[open]{border-left-color:var(--c-primary);background:var(--bg-elevated);}
.faq summary{
  list-style:none;display:flex;align-items:center;gap:14px;padding:20px 24px;
  cursor:pointer;font-size:16px;font-weight:700;
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary .qmark{
  width:26px;height:26px;border-radius:8px;flex-shrink:0;display:grid;place-items:center;
  background:rgba(18,225,165,.14);color:var(--c-primary);font-size:14px;font-weight:800;
}
.faq summary .plus{
  margin-left:auto;font-size:20px;color:var(--t-second);line-height:1;
  transition:transform var(--ease),color var(--ease);
}
.faq details[open] summary .plus{transform:rotate(45deg);color:var(--c-primary);}
.faq .answer{padding:0 24px 22px 64px;color:var(--t-second);font-size:14.5px;}

/* ============ 底部 CTA ============ */
.cta-band{
  border-radius:var(--r-panel);padding:44px;display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;background:
    radial-gradient(520px 240px at 8% 0%,rgba(18,225,165,.18),transparent 65%),
    radial-gradient(520px 240px at 100% 100%,rgba(108,75,255,.22),transparent 62%),
    var(--bg-elevated);
  border:1px solid var(--line);
}
.cta-band h2{max-width:640px;}
.cta-band p{color:var(--t-second);margin-top:12px;max-width:600px;font-size:15px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-footer);border-top:1px solid var(--divider);padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1.2fr 1fr 1fr;gap:32px;}
.footer-brand p{color:var(--t-second);font-size:14px;margin-top:16px;max-width:320px;}
.footer-qr{
  margin-top:18px;width:120px;height:120px;border-radius:14px;border:1px dashed var(--line);
  display:grid;place-items:center;text-align:center;font-size:12px;color:var(--t-weak);
  background:rgba(255,255,255,.02);padding:8px;
}
.footer-col h4{font-size:14px;letter-spacing:.06em;color:var(--t-primary);margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14px;color:var(--t-second);transition:color var(--ease);}
.footer-col a:hover{color:var(--c-primary);}
.footer-bottom{
  margin-top:48px;border-top:1px solid var(--divider);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:var(--t-weak);
}
.footer-bottom nav{display:flex;gap:16px;flex-wrap:wrap;}
.footer-bottom nav a{color:var(--t-weak);transition:color var(--ease);}
.footer-bottom nav a:hover{color:var(--c-primary);}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .nav-tabs a{padding:8px 12px;font-size:13px;}
  .logo-text span{display:none;}
}
@media (max-width:1023px){
  .section{padding:72px 0;}
  .bento{grid-template-columns:repeat(2,1fr);}
  .b-item--wide{grid-column:span 2;}
  .link-cards{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-brand{grid-column:span 2;}
}
@media (max-width:900px){
  .nav-burger{display:block;}
  .nav-tabs{
    position:absolute;left:16px;right:16px;top:calc(100% + 10px);
    flex-direction:column;align-items:stretch;gap:6px;
    background:var(--bg-elevated);border-radius:var(--r-panel);padding:12px;
    box-shadow:0 24px 50px -20px rgba(0,0,0,.95);
    display:none;border:1px solid var(--line);
  }
  .nav-tabs.is-open{display:flex;}
  .nav-tabs a{text-align:center;padding:12px 14px;font-size:15px;}
  .nav-link-quiet{display:none;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .section--tight{padding:48px 0;}
  .nav-actions .btn{height:42px;padding:0 16px;font-size:14px;}
  .page-head{padding:40px 0 28px;}
  .page-head-inner{flex-direction:column;align-items:flex-start;gap:22px;}
  .head-cta{width:100%;}
  .head-cta .btn{width:100%;}
  .bento{grid-template-columns:1fr;}
  .b-item--wide{grid-column:span 1;}
  .link-cards{grid-template-columns:1fr;}
  .cta-band{padding:28px 20px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .faq .answer{padding:0 20px 20px 20px;}
  .faq summary{padding:16px 18px;font-size:15px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-brand{grid-column:span 1;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  h1{font-size:26px;}
  .logo-text strong{font-size:14px;}
  .b-metrics{grid-template-columns:1fr;}
  .compare-group{padding:18px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}