/* roulang page: index */
:root{
  --ink:#0B0C0E;
  --ink-soft:#101216;
  --panel:#14161A;
  --panel-2:#181B20;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.18);
  --text:#F2F4F5;
  --muted:#9BA3A9;
  --dim:#5A6165;
  --lime:#C9F73A;
  --lime-soft:rgba(201,247,58,.12);
  --lime-line:rgba(201,247,58,.4);
  --orange:#FF6A2B;
  --orange-soft:rgba(255,106,43,.14);
  --radius-s:10px;
  --radius:14px;
  --radius-lg:18px;
  --shadow-hover:0 18px 40px rgba(0,0,0,.45);
  --glow:0 8px 24px rgba(201,247,58,.25);
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:200ms;
  --gap-l:96px;
  --gap-m:72px;
  --gap-s:48px;
  --bs-body-bg:#0B0C0E;
  --bs-body-color:#F2F4F5;
  --bs-primary:#C9F73A;
  --bs-border-color:rgba(255,255,255,.08);
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease)}
a:hover{color:var(--lime)}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{padding-left:1.1em}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.25}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
::selection{background:var(--lime);color:var(--ink)}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px}

.container{max-width:1200px;padding-left:24px;padding-right:24px}
.section{padding:var(--gap-l) 0}
.section-sm{padding:var(--gap-m) 0}
.section-tight{padding:var(--gap-s) 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);font-weight:600;margin-bottom:16px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--lime);display:inline-block}
.h2{font-size:clamp(26px,3.4vw,34px);margin-bottom:14px}
.h3{font-size:21px}
.lead{color:var(--muted);font-size:16px;max-width:660px}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:40px}
.divider-neon{height:1px;background:linear-gradient(90deg,var(--lime),var(--orange) 45%,transparent);border:0;margin:0;opacity:.7}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(11,12,14,.96);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.site-header.scrolled{background:rgba(11,12,14,.92);border-bottom-color:transparent;box-shadow:0 1px 0 transparent}
.site-header.scrolled::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,var(--lime),var(--orange) 55%,transparent);
}
.nav-shell{display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:20px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:17px;letter-spacing:-.01em}
.brand-mark{
  width:30px;height:30px;flex:0 0 30px;position:relative;
  border:2px solid var(--lime);border-radius:8px;
  clip-path:polygon(0 0,100% 0,100% 72%,74% 100%,0 100%);
}
.brand-mark::after{
  content:"";position:absolute;left:8px;top:5px;width:12px;height:12px;
  background:linear-gradient(45deg,var(--lime),var(--orange));
  transform:rotate(45deg);
  clip-path:polygon(0 0,100% 50%,0 100%);
}
.brand-text{white-space:nowrap}
.brand-text em{font-style:normal;color:var(--muted);font-weight:600}
.nav-list{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0}
.nav-link-x{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 14px;
  font-size:14px;font-weight:600;color:var(--muted);border-radius:8px;
}
.nav-link-x:hover{color:var(--lime)}
.nav-link-x.active{color:var(--lime)}
.nav-link-x.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--lime);box-shadow:0 6px 14px rgba(201,247,58,.55);border-radius:2px;
}
.nav-cta{margin-left:10px}
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-s);border:1px solid transparent;
  font-size:15px;font-weight:700;cursor:pointer;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn-primary-x{
  background:var(--lime);color:var(--ink);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 6px),calc(100% - 6px) 100%,0 100%);
}
.btn-primary-x:hover{background:#d6ff4f;color:var(--ink);box-shadow:var(--glow)}
.btn-primary-x:active{transform:translateY(1px)}
.btn-ghost-x{background:transparent;border-color:var(--line-strong);color:var(--text)}
.btn-ghost-x:hover{border-color:var(--lime);color:var(--lime)}
.btn-sm-x{height:40px;padding:0 18px;font-size:14px}
.btn-block-x{width:100%}
.link-x{color:var(--lime);font-weight:600;font-size:14px;position:relative;display:inline-flex;align-items:center;gap:8px}
.link-x::before{
  content:"";width:0;height:2px;background:var(--lime);transition:width var(--dur) var(--ease);
}
.link-x:hover::before{width:14px}
.burger{
  width:44px;height:44px;display:none;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--line-strong);border-radius:10px;cursor:pointer;
}
.burger span{display:block;width:18px;height:2px;background:var(--text);position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text)}
.burger span::before{top:-6px}
.burger span::after{top:6px}
.offcanvas{background:var(--ink);color:var(--text);border-right:1px solid var(--line)}
.offcanvas-header{border-bottom:1px solid var(--line)}
.offcanvas .nav-list{flex-direction:column;align-items:stretch;gap:0;width:100%}
.offcanvas .nav-link-x{height:56px;border-bottom:1px solid var(--line);border-radius:0;justify-content:space-between;width:100%}
.offcanvas .nav-link-x.active::after{left:0;right:auto;width:3px;height:24px;bottom:auto;top:16px}

/* Hero */
.hero{position:relative;padding:64px 0 0;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(720px 420px at 12% -10%,rgba(201,247,58,.10),transparent 70%),
             radial-gradient(560px 360px at 90% 10%,rgba(255,106,43,.09),transparent 72%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:1}
.hero h1{font-size:clamp(28px,4.6vw,52px);margin-bottom:16px}
.hero h1 .hl{color:var(--lime)}
.hero-sub{font-size:clamp(17px,1.6vw,20px);color:var(--muted);margin-bottom:24px;max-width:520px}
.hero-points{list-style:none;margin:0 0 30px;padding:0;display:flex;flex-wrap:wrap;gap:10px 22px}
.hero-points li{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--text)}
.hero-points li::before{content:"";width:8px;height:8px;background:var(--lime);display:inline-block;flex:0 0 8px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px}
.hero-figure{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);background:var(--panel)}
.hero-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.hero-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(11,12,14,.9),rgba(11,12,14,.35) 55%,rgba(11,12,14,0));
}
.hero-figure figcaption{
  position:absolute;left:20px;bottom:16px;z-index:2;font-size:13px;color:var(--muted);
  background:rgba(11,12,14,.72);border:1px solid var(--line);border-radius:999px;padding:5px 12px;
}
.mini-strip{
  margin-top:56px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  display:grid;grid-template-columns:repeat(4,1fr);
}
.mini-strip > div{padding:18px 20px;border-right:1px solid var(--line)}
.mini-strip > div:last-child{border-right:0}
.mini-strip b{display:block;font-size:19px;font-weight:800;font-variant-numeric:tabular-nums}
.mini-strip span{font-size:13px;color:var(--muted)}

/* 指标看板 */
.board{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.board-cell{padding:36px 28px;border-right:1px solid var(--line)}
.board-cell:last-child{border-right:0}
.metric-num{font-size:clamp(44px,5vw,64px);font-weight:800;line-height:1;font-variant-numeric:tabular-nums;letter-spacing:-.03em;color:var(--text)}
.metric-num small{font-size:.4em;color:var(--muted);margin-left:6px;font-weight:600}
.metric-label{margin-top:14px;font-size:13px;letter-spacing:.08em;color:var(--muted)}
.pill{
  display:inline-flex;align-items:center;gap:6px;margin-top:16px;
  font-size:12px;font-weight:700;letter-spacing:.04em;
  padding:4px 10px;border-radius:999px;border:1px solid transparent;
}
.pill-lime{background:var(--lime-soft);color:var(--lime);border-color:var(--lime-line)}
.pill-orange{background:var(--orange-soft);color:var(--orange);border-color:rgba(255,106,43,.35)}

/* 服务矩阵 */
.matrix{display:grid;gap:24px}
.card-x{
  position:relative;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;height:100%;overflow:hidden;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.card-x::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,var(--lime),var(--orange) 45%,transparent);
  opacity:.6;transition:opacity var(--dur) var(--ease);
}
.card-x:hover{transform:translateY(-2px);border-color:var(--lime-line);box-shadow:var(--shadow-hover)}
.card-x:hover::before{opacity:1}
.card-main{
  grid-column:span 6;border-radius:var(--radius-lg);padding:36px;
  background:linear-gradient(135deg,rgba(201,247,58,.06),rgba(20,22,26,1) 52%),var(--panel);
}
.card-side{grid-column:span 3}
.card-title{font-size:18px;font-weight:700;margin:0 0 10px}
.card-main .card-title{font-size:24px}
.card-text{font-size:14px;color:var(--muted);margin:0 0 18px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.icon-x{width:28px;height:28px;stroke:var(--lime);stroke-width:1.5;fill:none;margin-bottom:18px}
.icon-x.orange{stroke:var(--orange)}

/* 列表卡 */
.feature-card{
  position:relative;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;height:100%;display:flex;flex-direction:column;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.feature-card:hover{transform:translateY(-2px);border-color:var(--lime-line);box-shadow:var(--shadow-hover)}
.feature-card:hover .feature-media img{transform:scale(1.04)}
.feature-media{position:relative;overflow:hidden}
.feature-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform 600ms var(--ease)}
.badge-cat{
  position:absolute;left:16px;bottom:14px;
  font-size:12px;font-weight:700;letter-spacing:.04em;padding:5px 11px;border-radius:999px;
  background:rgba(11,12,14,.82);color:var(--lime);border:1px solid var(--lime-line);
}
.feature-body{padding:24px 26px 26px;display:flex;flex-direction:column;gap:12px;flex:1}
.feature-body h3{font-size:20px}
.feature-body h3 a:hover{color:var(--lime)}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:var(--muted);margin-top:auto}
.meta-time{font-variant-numeric:tabular-nums;letter-spacing:.04em}
.tagline{
  display:inline-flex;align-items:center;font-size:12px;font-weight:700;letter-spacing:.05em;
  color:var(--lime);border:1px solid var(--lime-line);border-radius:999px;padding:3px 10px;
}
.timeline{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.timeline li{border-bottom:1px solid var(--line)}
.timeline li:last-child{border-bottom:0}
.tl-item{position:relative;display:block;padding:18px 16px 18px 22px;transition:background var(--dur) var(--ease)}
.tl-item::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:4px;border-radius:2px;
  background:linear-gradient(180deg,var(--lime),var(--orange));
  opacity:.4;transition:opacity var(--dur) var(--ease),top var(--dur) var(--ease),bottom var(--dur) var(--ease);
}
.tl-item:hover{background:rgba(255,255,255,.025)}
.tl-item:hover::before{opacity:1;top:8px;bottom:8px}
.tl-item h4{font-size:17px;font-weight:600;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tl-item p{font-size:14px;color:var(--muted);margin:0 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.empty-state{
  min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  border:1px dashed var(--line-strong);border-radius:var(--radius-lg);background:var(--panel);
  padding:36px;text-align:center;
}
.empty-state p{font-size:14px;color:var(--muted);margin:0}

/* 对比 */
.compare-wrap{display:grid;grid-template-columns:1fr 1px 1fr;gap:0;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:var(--panel)}
.compare-col{padding:32px 30px}
.compare-col h3{font-size:19px;margin-bottom:18px}
.col-plain{background:rgba(255,255,255,.012)}
.col-plain h3{color:var(--muted)}
.col-key{position:relative;border-top:3px solid var(--lime);background:linear-gradient(180deg,rgba(201,247,58,.05),transparent 40%)}
.compare-sep{background:var(--line)}
.cmp-row{display:flex;align-items:flex-start;gap:12px;min-height:58px;padding:14px 0;border-bottom:1px solid var(--line);font-size:15px}
.cmp-row:last-child{border-bottom:0}
.col-key .cmp-row{border-bottom-color:rgba(201,247,58,.18)}
.cmp-mark{flex:0 0 20px;font-weight:800;line-height:1.6}
.col-plain .cmp-mark{color:var(--dim)}
.col-key .cmp-mark{color:var(--lime)}

/* FAQ */
.faq-wrap{max-width:840px;margin:0 auto}
.accordion-x .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.accordion-x .accordion-button{
  background:transparent;color:var(--text);font-size:17px;font-weight:600;
  padding:22px 44px 22px 0;box-shadow:none;border-radius:0;
}
.accordion-x .accordion-button::after{
  content:"";position:absolute;right:6px;top:50%;width:16px;height:16px;
  transform:translateY(-50%);transition:transform var(--dur) var(--ease);
  background:linear-gradient(var(--muted),var(--muted)) center/16px 2px no-repeat,
             linear-gradient(var(--muted),var(--muted)) center/2px 16px no-repeat;
}
.accordion-x .accordion-button:not(.collapsed){color:var(--lime);background:transparent}
.accordion-x .accordion-button:not(.collapsed)::after{
  transform:translateY(-50%) rotate(180deg);
  background:linear-gradient(var(--lime),var(--lime)) center/16px 2px no-repeat;
}
.accordion-x .accordion-button:focus{box-shadow:none;border-color:transparent}
.accordion-x .accordion-body{padding:0 44px 24px 0;color:var(--muted);font-size:15px;line-height:1.8}

/* 表单 */
.form-panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px}
.form-label-x{display:block;font-size:13px;color:var(--muted);margin-bottom:8px;letter-spacing:.04em}
.form-input{
  width:100%;height:48px;padding:0 14px;background:var(--panel-2);color:var(--text);
  border:1px solid var(--line);border-radius:var(--radius-s);font-size:15px;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.form-input::placeholder{color:var(--dim)}
.form-input:focus{outline:none;border-color:var(--lime);box-shadow:0 0 0 4px rgba(201,247,58,.12)}
.form-row{margin-bottom:18px}
.check-x{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--muted)}
.check-x input{
  appearance:none;-webkit-appearance:none;width:18px;height:18px;flex:0 0 18px;margin-top:2px;
  border:1px solid var(--line-strong);border-radius:4px;background:var(--panel-2);cursor:pointer;position:relative;
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.check-x input:checked{background:var(--lime);border-color:var(--lime)}
.check-x input:checked::after{
  content:"";position:absolute;left:5px;top:1px;width:5px;height:10px;
  border:solid var(--ink);border-width:0 2px 2px 0;transform:rotate(45deg);
}
.check-x input:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.trust-row{display:flex;flex-wrap:wrap;gap:14px 24px;margin-top:18px}
.trust-row span{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.trust-row svg{width:16px;height:16px;stroke:var(--lime);fill:none;stroke-width:1.8}
.bullet-list{list-style:none;padding:0;margin:22px 0 0}
.bullet-list li{position:relative;padding-left:18px;margin-bottom:12px;font-size:15px;color:var(--muted)}
.bullet-list li::before{content:"";position:absolute;left:0;top:10px;width:8px;height:8px;background:var(--lime)}

/* CTA 条 */
.cta-band{
  position:relative;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  background:linear-gradient(120deg,rgba(201,247,58,.08),rgba(20,22,26,1) 46%),var(--panel);
  padding:40px;
}
.cta-band h2{margin-bottom:12px}

/* 页脚 */
.site-footer{border-top:1px solid var(--line);margin-top:var(--gap-l);position:relative;background:var(--ink-soft)}
.site-footer::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:linear-gradient(90deg,var(--lime),var(--orange) 50%,transparent)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 40px}
.footer-title{font-size:13px;letter-spacing:.12em;color:var(--muted);font-weight:700;margin-bottom:18px}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links li{margin-bottom:12px}
.footer-links a{font-size:14px;color:var(--muted);display:inline-block;transition:transform var(--dur) var(--ease),color var(--dur) var(--ease)}
.footer-links a:hover{color:var(--lime);transform:translateX(2px)}
.footer-about{font-size:14px;color:var(--muted);max-width:320px;margin-top:18px}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;display:flex;flex-wrap:wrap;gap:12px 24px;
  justify-content:space-between;font-size:13px;color:var(--dim);
}
.footer-bottom a{color:var(--dim)}
.footer-bottom a:hover{color:var(--lime)}
.code-inline{font-variant-numeric:tabular-nums;letter-spacing:.04em}

/* 动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 520ms var(--ease),transform 520ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* 响应式 */
@media (max-width:1199.98px){
  .card-main{grid-column:span 12}
  .card-side{grid-column:span 6}
}
@media (max-width:991.98px){
  :root{--gap-l:72px;--gap-m:56px;--gap-s:40px}
  .nav-desktop{display:none}
  .burger{display:inline-flex}
  .header-cta{display:none}
  .board{grid-template-columns:repeat(2,1fr)}
  .board-cell:nth-child(2){border-right:0}
  .board-cell:nth-child(1),.board-cell:nth-child(2){border-bottom:1px solid var(--line)}
  .mini-strip{grid-template-columns:repeat(2,1fr)}
  .mini-strip > div:nth-child(2){border-right:0}
  .mini-strip > div:nth-child(1),.mini-strip > div:nth-child(2){border-bottom:1px solid var(--line)}
  .compare-wrap{grid-template-columns:1fr}
  .compare-sep{height:1px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767.98px){
  .hero{padding-top:40px}
  .card-side{grid-column:span 12}
  .compare-col{padding:26px 20px}
  .form-panel{padding:24px}
  .cta-band{padding:28px}
}
@media (max-width:575.98px){
  .container{padding-left:16px;padding-right:16px}
  .board{grid-template-columns:1fr}
  .board-cell{border-right:0;border-bottom:1px solid var(--line);padding:26px 18px}
  .board-cell:last-child{border-bottom:0}
  .mini-strip{grid-template-columns:1fr}
  .mini-strip > div{border-right:0}
  .footer-grid{grid-template-columns:1fr}
  .hero-cta .btn-x{width:100%}
  .metric-num{font-size:44px}
}

/* roulang page: article */
:root{
  --ink:#0B0C0E;
  --ink-2:#101216;
  --panel:#14161A;
  --panel-2:#181B20;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.18);
  --lime:#C9F73A;
  --lime-soft:rgba(201,247,58,.12);
  --lime-line:rgba(201,247,58,.4);
  --orange:#FF6A2B;
  --orange-soft:rgba(255,106,43,.14);
  --text:#F2F4F5;
  --muted:#9BA3A9;
  --disabled:#5A6165;
  --r-sm:10px;
  --r:14px;
  --r-lg:18px;
  --sp-s:48px;
  --sp-m:72px;
  --sp-l:96px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --bs-body-bg:var(--ink);
  --bs-body-color:var(--text);
  --bs-primary:var(--lime);
  --bs-border-color:var(--line);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.78;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--lime)}
button{font:inherit}
h1,h2,h3,h4{font-weight:800;letter-spacing:-.02em;line-height:1.25;margin:0}
p{margin:0 0 1.25em}
ul{margin:0}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:6px}
::selection{background:var(--lime);color:var(--ink)}
.container{max-width:1200px;padding-left:16px;padding-right:16px;margin-inline:auto}
@media (min-width:576px){.container{padding-left:24px;padding-right:24px}}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ===== 顶栏 ===== */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:var(--ink);
  border-bottom:1px solid var(--line);
  transition:background .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header.is-scrolled{background:rgba(11,12,14,.92);backdrop-filter:blur(10px);box-shadow:0 10px 30px rgba(0,0,0,.5)}
.site-header.is-scrolled::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,var(--lime),var(--orange),transparent);
  opacity:.7;
}
.nav-shell{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  position:relative;width:26px;height:26px;flex:0 0 auto;
  border:1.5px solid var(--lime);
  border-radius:6px;
  clip-path:polygon(0 0,72% 0,100% 28%,100% 100%,0 100%);
}
.brand-mark::after{
  content:"";position:absolute;left:5px;top:50%;width:13px;height:2px;
  background:var(--lime);transform:translateY(-50%) rotate(-45deg);
  box-shadow:0 -6px 0 -.4px var(--orange);
}
.brand-text{font-size:16px;font-weight:800;letter-spacing:-.01em;color:var(--text);white-space:nowrap}
.brand-text em{font-style:normal;color:var(--muted);font-weight:600;font-size:13px}
.nav-desktop{display:none}
.nav-list{display:flex;align-items:center;gap:4px;list-style:none;padding:0;margin:0}
.nav-link-x{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 14px;
  font-size:14px;font-weight:600;color:var(--muted);border-radius:8px;
}
.nav-link-x::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;border-radius:2px;
  background:var(--lime);opacity:0;transform:scaleX(.4);transform-origin:left;
  transition:opacity .18s var(--ease),transform .22s var(--ease);
}
.nav-link-x:hover{color:var(--lime)}
.nav-link-x.active{color:var(--lime);text-shadow:0 0 14px rgba(201,247,58,.6)}
.nav-link-x.active::after{opacity:1;transform:scaleX(1);box-shadow:0 6px 14px rgba(201,247,58,.5)}
.header-cta{display:none}
.burger{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--panel);border:1px solid var(--line-2);border-radius:10px;cursor:pointer;
}
.burger span{position:relative;width:18px;height:2px;background:var(--text);border-radius:2px;display:block}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px}
.burger span::before{top:-6px}
.burger span::after{top:6px}
@media (min-width:992px){
  .nav-desktop{display:block}
  .header-cta{display:inline-flex}
  .burger{display:none}
}

/* ===== 按钮 ===== */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:47px;padding:0 24px;font-size:15px;font-weight:700;border:0;cursor:pointer;
  border-radius:var(--r-sm);
  transition:transform .18s var(--ease),box-shadow .2s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn-primary-x{
  background:var(--lime);color:var(--ink);
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
}
.btn-primary-x:hover{color:var(--ink);filter:brightness(1.08);box-shadow:0 8px 24px rgba(201,247,58,.25)}
.btn-primary-x:active{transform:translateY(1px)}
.btn-ghost-x{background:transparent;color:var(--text);border:1px solid var(--line-2)}
.btn-ghost-x:hover{color:var(--lime);border-color:var(--lime-line)}
.btn-sm-x{height:40px;padding:0 18px;font-size:13.5px}
.link-x{
  display:inline-flex;align-items:center;gap:8px;color:var(--lime);font-weight:700;font-size:14px;
  padding-left:0;transition:padding-left .2s var(--ease)
}
.link-x::before{content:"";width:0;height:2px;background:var(--lime);transition:width .2s var(--ease)}
.link-x:hover{padding-left:2px;color:var(--lime)}
.link-x:hover::before{width:14px}

/* ===== 抽屉 ===== */
.drawer-x{background:var(--ink)!important;color:var(--text);width:min(88vw,360px)}
.drawer-x .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px}
.drawer-x .offcanvas-body{padding:8px 20px 24px;display:flex;flex-direction:column;justify-content:space-between}
.drawer-nav{list-style:none;padding:0;margin:0}
.drawer-nav li{border-bottom:1px solid var(--line)}
.drawer-nav a{display:flex;align-items:center;justify-content:space-between;min-height:52px;font-size:15px;font-weight:600;color:var(--text)}
.drawer-nav a.active{color:var(--lime)}
.drawer-foot{padding-top:20px}
.btn-close{filter:invert(1) grayscale(1) brightness(1.6)}

/* ===== 文章头部 ===== */
.article-hero{
  position:relative;
  padding:40px 0 56px;
  background-image:linear-gradient(180deg,rgba(11,12,14,.86),rgba(11,12,14,.97)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.article-hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:1px;
  background:linear-gradient(90deg,transparent,var(--lime),transparent);opacity:.35;
}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:26px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--lime)}
.crumbs .sep{color:var(--disabled)}
.crumbs .now{color:var(--lime);max-width:min(60vw,520px);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-h1{
  font-size:clamp(28px,3.6vw,46px);
  max-width:880px;
  margin:14px 0 0;
}
.h1-rule{width:40px;height:3px;background:var(--lime);border-radius:3px;margin-bottom:14px}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;margin-top:22px;font-size:13.5px;color:var(--muted)}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--disabled)}
.badge-x{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;font-size:12.5px;font-weight:700;letter-spacing:.06em;
  border-radius:999px;border:1px solid var(--lime-line);color:var(--lime);background:var(--lime-soft);
}
.badge-x.is-orange{border-color:rgba(255,106,43,.45);color:var(--orange);background:var(--orange-soft)}

/* ===== 布局 ===== */
.article-main{padding:56px 0 72px}
@media (min-width:992px){.article-main{padding:72px 0 96px}}
.article-col{max-width:840px}
.article-body{
  font-size:16.5px;line-height:1.9;color:#DFE3E5;
}
.article-body p{margin:0 0 1.25em}
.article-body h2{
  position:relative;font-size:clamp(21px,2.4vw,28px);color:var(--text);
  margin:2em 0 .8em;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--lime),var(--orange));
}
.article-body h3{font-size:18px;font-weight:800;color:var(--text);margin:1.6em 0 .6em}
.article-body a{color:var(--lime);text-decoration:underline;text-underline-offset:3px}
.article-body img{border-radius:14px;margin:1.4em 0 .6em;width:100%}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center}
.article-body blockquote{
  margin:1.6em 0;padding:18px 22px;font-size:15px;font-style:italic;
  background:var(--panel);border-left:3px solid var(--lime);border-radius:0 12px 12px 0;color:#C9D0D4;
}
.article-body ul{list-style:none;padding-left:0;margin:0 0 1.25em}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:.55em}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;border-radius:2px;
  background:var(--lime);transform:rotate(45deg);
}
.article-body ol{padding-left:22px;margin:0 0 1.25em}
.article-body ol li{margin-bottom:.5em}
.article-body table,.article-body pre{display:block;overflow-x:auto;max-width:100%}
.article-body table{border-collapse:collapse;margin:1.4em 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:var(--panel-2);color:var(--lime);font-weight:700}
.article-body pre{background:#0F1114;border:1px solid var(--line);border-radius:12px;padding:16px;font-size:14px;line-height:1.7}
.article-body code{background:rgba(255,255,255,.06);border-radius:6px;padding:2px 6px;font-size:14px;color:var(--lime)}
.article-body pre code{background:none;padding:0;color:#D8DEE2}

/* 空态 */
.empty-state{
  min-height:280px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:40px 24px;text-align:center;
}
.empty-state svg{width:38px;height:38px;stroke:var(--lime);fill:none;stroke-width:1.5}
.empty-state p{font-size:14px;color:var(--muted);margin:0}

/* ===== 文末 ===== */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:44px 0 0;padding-top:26px;border-top:1px solid var(--line)}
.tag-x{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;font-size:12.5px;color:var(--muted);
  border:1px solid var(--line-2);border-radius:999px;transition:all .2s var(--ease)
}
.tag-x:hover{color:var(--lime);border-color:var(--lime-line);background:var(--lime-soft)}
.pn-grid{display:grid;grid-template-columns:1fr;gap:16px;margin-top:32px}
@media (min-width:768px){.pn-grid{grid-template-columns:1fr 1fr}}
.pn-card{
  position:relative;display:block;padding:20px 22px;background:var(--panel);
  border:1px solid var(--line);border-radius:var(--r);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease)
}
.pn-card:hover{transform:translateY(-2px);border-color:var(--lime-line);box-shadow:var(--shadow)}
.pn-card span{font-size:12.5px;letter-spacing:.08em;color:var(--muted)}
.pn-card strong{display:block;margin-top:8px;font-size:16px;font-weight:700;color:var(--text)}
.pn-card:hover strong{color:var(--lime)}
.pn-card.is-next{text-align:right}
.section-sub{margin-top:48px}
.section-head-x{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px}
.section-head-x h2{font-size:22px}
.section-head-x p{font-size:13.5px;color:var(--muted);margin:6px 0 0}
.rec-list{display:grid;grid-template-columns:1fr;gap:14px}
@media (min-width:768px){.rec-list{grid-template-columns:repeat(3,1fr)}}
.rec-card{
  position:relative;display:block;overflow:hidden;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--r);padding:18px 18px 18px 22px;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease)
}
.rec-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;height:40%;top:50%;transform:translateY(-50%);
  background:linear-gradient(180deg,var(--lime),var(--orange));
  transition:height .22s var(--ease);border-radius:0 4px 4px 0
}
.rec-card:hover::before{height:100%}
.rec-card:hover{transform:translateY(-2px);border-color:var(--lime-line);box-shadow:var(--shadow)}
.rec-card h3{font-size:16px;font-weight:700;line-height:1.4}
.rec-card p{font-size:13.5px;color:var(--muted);margin:8px 0 12px;line-height:1.7}
.rec-meta{display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--muted)}
.rec-meta .pill{border:1px solid var(--line-2);border-radius:999px;padding:2px 10px}

/* ===== 侧栏 ===== */
.side-col{display:none}
@media (min-width:1200px){
  .side-col{display:block}
  .side-inner{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
}
.side-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.side-card h4{font-size:13px;letter-spacing:.1em;color:var(--muted);font-weight:700;margin-bottom:16px}
.toc{list-style:none;padding:0;margin:0}
.toc li{margin-bottom:2px}
.toc a{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--muted);padding:9px 0;border-bottom:1px solid var(--line)}
.toc a::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--disabled);flex:0 0 auto;transition:background .2s var(--ease)}
.toc a:hover{color:var(--lime)}
.toc a:hover::before{background:var(--lime)}
.toc li:last-child a{border-bottom:0}
.side-links{list-style:none;padding:0;margin:0}
.side-links li{padding:11px 0;border-bottom:1px solid var(--line);font-size:14px}
.side-links li:last-child{border-bottom:0}
.side-links a{color:var(--text);display:block}
.side-links a:hover{color:var(--lime)}
.side-cta{
  background:linear-gradient(150deg,rgba(201,247,58,.14),rgba(255,106,43,.08)),
  var(--panel);
  border:1px solid var(--lime-line);
}
.side-cta p{font-size:13.5px;color:var(--muted);margin:10px 0 18px}
.side-cta .btn-x{width:100%}
.side-thumb{border-radius:10px;overflow:hidden;margin-bottom:14px}
.side-thumb img{width:100%;height:120px;object-fit:cover}

/* ===== CTA 条 ===== */
.cta-strip{
  margin-top:56px;padding:32px;border-radius:var(--r-lg);
  background:linear-gradient(120deg,rgba(201,247,58,.10),rgba(255,106,43,.06)),var(--panel-2);
  border:1px solid var(--line);
  display:flex;flex-direction:column;gap:20px;
}
@media (min-width:768px){.cta-strip{flex-direction:row;align-items:center;justify-content:space-between}}
.cta-strip h3{font-size:20px}
.cta-strip p{font-size:14px;color:var(--muted);margin:8px 0 0}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ===== 页脚 ===== */
.site-footer{margin-top:auto;position:relative;background:var(--ink-2);border-top:1px solid var(--line);padding:56px 0 22px}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:1px;
  background:linear-gradient(90deg,transparent,var(--lime),var(--orange),transparent);opacity:.6;
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:576px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:992px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr}}
.footer-about{font-size:14px;color:var(--muted);margin:16px 0 0;max-width:320px}
.footer-title{font-size:13px;letter-spacing:.1em;color:var(--muted);font-weight:700;margin-bottom:16px}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links li{margin-bottom:10px;font-size:14px}
.footer-links a{color:var(--text);display:inline-block;transition:transform .18s var(--ease),color .18s var(--ease)}
.footer-links a:hover{color:var(--lime);transform:translateX(2px)}
.code-inline{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;font-size:13px;color:var(--muted)
}
.footer-bottom a{color:var(--muted)}
.footer-bottom a:hover{color:var(--lime)}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *{transition-duration:.001ms!important;animation-duration:.001ms!important}
}
@media (max-width:575.98px){
  .article-main{padding:40px 0 56px}
  .article-hero{padding:28px 0 40px}
  .cta-strip{padding:24px}
  .brand-text{font-size:15px}
  .brand-text em{font-size:12px}
}

/* roulang page: category1 */
:root{
  --bg:#0B0C0E;
  --panel:#14161A;
  --panel-2:#191C21;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.18);
  --txt:#F2F4F5;
  --muted:#9BA3A9;
  --dim:#5A6165;
  --lime:#C9F73A;
  --orange:#FF6A2B;
  --r-xs:8px;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --t:200ms;
  --s-xl:96px;
  --s-lg:72px;
  --s-md:48px;
  --bs-body-bg:#0B0C0E;
  --bs-body-color:#F2F4F5;
  --bs-primary:#C9F73A;
  --bs-border-color:rgba(255,255,255,.08);
  --bs-link-color:#C9F73A;
  --bs-link-hover-color:#d9ff5c;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--txt);
  font-family:"PingFang SC","HarmonyOS Sans","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--lime);text-decoration:none;transition:color var(--t) var(--ease);}
a:hover{color:#d9ff5c;}
button,input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:4px;}

.container{width:100%;max-width:1200px;margin-inline:auto;padding-inline:16px;}
@media (min-width:768px){.container{padding-inline:24px;}}

/* ---------- 通用标题与文本 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--lime);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--lime);display:block;clip-path:polygon(0 0,100% 0,84% 100%,0 100%);}
.sec-title{font-size:clamp(24px,3vw,32px);font-weight:800;letter-spacing:-.02em;line-height:1.28;}
.sec-desc{color:var(--muted);font-size:15px;max-width:640px;}
.text-muted-x{color:var(--muted);}
.mono{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(11,12,14,.92);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background var(--t) var(--ease),border-color var(--t) var(--ease);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(201,247,58,.55),rgba(255,106,43,.35),transparent);
  opacity:.7;pointer-events:none;
}
.site-header.is-scrolled{background:rgba(11,12,14,.96);}
.nav-shell{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:68px;
}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--txt);font-weight:800;}
.brand:hover{color:var(--txt);}
.brand-mark{
  width:26px;height:26px;flex:0 0 26px;position:relative;
  border:2px solid var(--lime);
  border-radius:6px;
  clip-path:polygon(0 0,100% 0,100% 62%,78% 100%,0 100%);
}
.brand-mark::after{
  content:"";position:absolute;left:50%;top:50%;width:12px;height:12px;
  transform:translate(-50%,-50%) rotate(45deg);
  background:linear-gradient(135deg,var(--lime),var(--orange));
  clip-path:polygon(0 0,100% 50%,0 100%,30% 50%);
}
.brand-text{font-size:16px;letter-spacing:-.01em;white-space:nowrap;}
.brand-text em{font-style:normal;color:var(--lime);font-weight:700;}
.nav-desktop{display:none;}
.nav-list{display:flex;align-items:center;gap:6px;}
.nav-link-x{
  position:relative;display:inline-flex;align-items:center;
  padding:10px 14px;font-size:14px;font-weight:600;color:var(--muted);
  border-radius:var(--r-xs);transition:color 160ms var(--ease),background 160ms var(--ease);
}
.nav-link-x:hover{color:var(--txt);background:rgba(255,255,255,.04);}
.nav-link-x.active{color:var(--lime);}
.nav-link-x.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--lime);box-shadow:0 0 10px rgba(201,247,58,.75);
}
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:0;cursor:pointer;font-weight:700;font-size:15px;
  height:47px;padding:0 24px;border-radius:var(--r-sm);
  transition:transform 160ms var(--ease),background var(--t) var(--ease),color var(--t) var(--ease),box-shadow var(--t) var(--ease),border-color var(--t) var(--ease);
}
.btn-primary-x{
  background:var(--lime);color:#0B0C0E;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 6px),calc(100% - 6px) 100%,0 100%);
}
.btn-primary-x:hover{background:#d9ff5c;color:#0B0C0E;box-shadow:0 8px 24px rgba(201,247,58,.25);}
.btn-primary-x:active{transform:translateY(1px);}
.btn-ghost-x{
  background:transparent;color:var(--txt);border:1px solid var(--line-2);
}
.btn-ghost-x:hover{border-color:var(--lime);color:var(--lime);}
.btn-ghost-x:active{transform:translateY(1px);}
.btn-sm-x{height:40px;padding:0 18px;font-size:14px;}
.btn-lg-x{height:52px;padding:0 30px;font-size:16px;}
.header-cta{display:none;}
@media (min-width:576px){.header-cta{display:inline-flex;}}

.burger{
  width:44px;height:42px;border-radius:var(--r-sm);
  border:1px solid var(--line-2);background:transparent;
  display:inline-flex;align-items:center;justify-content:center;
  transition:border-color var(--t) var(--ease);
}
.burger:hover{border-color:var(--lime);}
.burger span,
.burger span::before,
.burger span::after{
  display:block;width:18px;height:2px;background:var(--txt);border-radius:2px;
  transition:transform 200ms var(--ease),opacity 200ms var(--ease);
}
.burger span::before,.burger span::after{content:"";position:relative;}
.burger span::before{top:-6px;}
.burger span::after{top:4px;}

@media (min-width:992px){
  .nav-desktop{display:block;}
  .burger{display:none;}
  .header-cta{display:inline-flex;}
}

/* 移动端抽屉 */
.nav-drawer{
  background:#0B0C0E;color:var(--txt);width:min(360px,86vw);
  border-left:1px solid var(--line);
}
.nav-drawer .offcanvas-header{padding:18px 20px;border-bottom:1px solid var(--line);}
.nav-drawer .offcanvas-body{padding:12px 20px 28px;display:flex;flex-direction:column;}
.drawer-list{display:flex;flex-direction:column;}
.drawer-list a{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 4px;font-size:15.5px;font-weight:600;color:var(--txt);
  border-bottom:1px solid var(--line);min-height:52px;
}
.drawer-list a:hover,.drawer-list a.active{color:var(--lime);}
.drawer-list a.active::before{
  content:"";width:3px;height:16px;background:var(--lime);margin-right:10px;border-radius:2px;
  box-shadow:0 0 10px rgba(201,247,58,.7);
}
.drawer-foot{margin-top:auto;padding-top:24px;}
.btn-close-x{
  width:40px;height:40px;border-radius:var(--r-sm);border:1px solid var(--line-2);
  background:transparent;color:var(--txt);display:inline-flex;align-items:center;justify-content:center;
}
.btn-close-x:hover{border-color:var(--lime);color:var(--lime);}
.btn-close-x svg{width:16px;height:16px;}

/* ---------- 面包屑 ---------- */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--lime);}
.crumb .sep{color:var(--dim);}
.crumb .current{color:var(--lime);font-weight:600;}

/* ---------- 页面 Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:56px 0 52px;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(100deg,rgba(11,12,14,.96) 0%,rgba(11,12,14,.86) 46%,rgba(11,12,14,.62) 100%),
    url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  z-index:-2;
}
.page-hero::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(201,247,58,.16),transparent 66%);
  z-index:-1;pointer-events:none;
}
.page-hero h1{
  font-size:clamp(28px,4.4vw,44px);
  font-weight:800;letter-spacing:-.02em;line-height:1.24;
  margin:18px 0 16px;
}
.page-hero .lead-x{
  color:var(--muted);font-size:16px;max-width:680px;
}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:24px;
}
.hero-facts li{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13.5px;color:var(--muted);
}
.hero-facts li::before{
  content:"";width:8px;height:8px;background:var(--lime);flex:0 0 8px;
  clip-path:polygon(0 0,100% 0,100% 78%,74% 100%,0 100%);
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px;}
.tag-x{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;
  border:1px solid var(--line-2);border-radius:999px;
  font-size:12.5px;color:var(--muted);
  transition:border-color var(--t) var(--ease),color var(--t) var(--ease);
}
.tag-x:hover{border-color:var(--lime);color:var(--lime);}

/* ---------- 板块间距 ---------- */
.section{padding:var(--s-lg) 0;}
.section-lg{padding:var(--s-xl) 0;}
.section-tight{padding:var(--s-md) 0;}
@media (max-width:767px){
  .section{padding:52px 0;}
  .section-lg{padding:60px 0;}
  .section-tight{padding:36px 0;}
}

/* ---------- 目录侧栏 ---------- */
.toc-card{
  position:sticky;top:96px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:20px 18px;
  overflow:hidden;
}
.toc-card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,var(--lime),var(--orange),transparent);
}
.toc-title{
  font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--muted);
  margin-bottom:14px;
}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:flex;gap:10px;align-items:flex-start;
  padding:9px 8px;border-radius:var(--r-xs);
  font-size:13.5px;color:var(--muted);line-height:1.55;
  transition:color var(--t) var(--ease),background var(--t) var(--ease);
}
.toc-list a .num{font-variant-numeric:tabular-nums;color:var(--dim);font-size:12px;line-height:1.7;}
.toc-list a:hover{color:var(--txt);background:rgba(255,255,255,.04);}
.toc-list a.active{color:var(--lime);background:rgba(201,247,58,.07);}
.toc-list a.active .num{color:var(--lime);}
.toc-cta{
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}
.toc-cta .btn-x{margin-top:12px;width:100%;}

/* 目录横向滚动（中屏） */
@media (max-width:991px){
  .toc-card{position:static;padding:16px 14px;}
  .toc-list{
    flex-direction:row;gap:8px;overflow-x:auto;padding-bottom:4px;
    scrollbar-width:thin;
  }
  .toc-list a{
    flex:0 0 auto;white-space:nowrap;border:1px solid var(--line-2);
    padding:7px 12px;border-radius:999px;font-size:13px;
  }
  .toc-list a .num{display:none;}
  .toc-cta{display:flex;align-items:center;justify-content:space-between;gap:12px;}
  .toc-cta .btn-x{margin-top:0;width:auto;}
}

/* ---------- 长文分节 ---------- */
.doc-sec{
  padding:0 0 44px;
  margin-bottom:44px;
  border-bottom:1px solid var(--line);
  scroll-margin-top:96px;
}
.doc-sec:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0;}
.doc-sec h2{
  position:relative;
  font-size:clamp(21px,2.6vw,28px);
  font-weight:800;letter-spacing:-.02em;line-height:1.34;
  padding-left:16px;margin-bottom:20px;
}
.doc-sec h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:3px;
  background:linear-gradient(180deg,var(--lime),var(--orange));
  border-radius:2px;
}
.doc-sec p{
  color:#D3D8DB;font-size:16.5px;line-height:1.9;margin-bottom:18px;
}
.doc-sec p:last-of-type{margin-bottom:0;}
.doc-sec strong{color:var(--txt);font-weight:700;}
.doc-list{margin:0 0 20px;}
.doc-list li{
  position:relative;padding-left:20px;margin-bottom:10px;
  color:#D3D8DB;font-size:15.5px;line-height:1.8;
}
.doc-list li::before{
  content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;background:var(--lime);
  clip-path:polygon(0 0,100% 0,100% 78%,74% 100%,0 100%);
}
.figure{
  margin:24px 0 0;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  background:var(--panel);
}
.figure img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  filter:saturate(.92) contrast(1.02);
}
.figure figcaption{
  padding:12px 16px;font-size:13px;color:var(--muted);
  border-top:1px solid var(--line);
}
.note-box{
  margin-top:22px;
  background:var(--panel);
  border:1px solid var(--line);
  border-left:3px solid var(--lime);
  border-radius:var(--r-sm);
  padding:16px 18px;
  font-size:14.5px;color:var(--muted);line-height:1.8;
}
.note-box b{color:var(--txt);}

/* ---------- 精简 FAQ ---------- */
.accordion-x .accordion-item{
  background:transparent;border:0;border-bottom:1px solid var(--line);
}
.accordion-x .accordion-button{
  position:relative;background:transparent;color:var(--txt);
  font-size:16.5px;font-weight:600;line-height:1.6;
  padding:22px 44px 22px 0;box-shadow:none;
  transition:color var(--t) var(--ease);
}
.accordion-x .accordion-button::after{
  content:"";position:absolute;right:2px;top:50%;width:16px;height:16px;
  transform:translateY(-50%);
  background-image:linear-gradient(var(--lime),var(--lime)),linear-gradient(var(--lime),var(--lime));
  background-size:16px 2px,2px 16px;
  background-position:center;background-repeat:no-repeat;
  transition:transform 240ms var(--ease),background-size 240ms var(--ease);
}
.accordion-x .accordion-button:not(.collapsed){color:var(--lime);}
.accordion-x .accordion-button:not(.collapsed)::after{
  transform:translateY(-50%) rotate(180deg);
  background-size:16px 2px,2px 0;
}
.accordion-x .accordion-button:focus{box-shadow:none;}
.accordion-x .accordion-button:focus-visible{outline:2px solid var(--lime);outline-offset:4px;}
.accordion-x .accordion-body{
  padding:0 44px 24px 0;color:var(--muted);font-size:15px;line-height:1.85;
}
.accordion-x .accordion-body p{margin-bottom:12px;}
.accordion-x .accordion-body p:last-child{margin-bottom:0;}

/* ---------- CTA 条 ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:38px 28px;
}
.cta-band::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,var(--lime),var(--orange),transparent);
}
.cta-band::after{
  content:"";position:absolute;right:-90px;bottom:-140px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,106,43,.16),transparent 68%);
  pointer-events:none;
}
.cta-band h2{
  font-size:clamp(22px,2.8vw,30px);font-weight:800;letter-spacing:-.02em;line-height:1.3;
}
.cta-band p{color:var(--muted);font-size:15px;margin-top:12px;max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;}
@media (min-width:992px){
  .cta-band{padding:46px 44px;}
  .cta-band .cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px;}
  .cta-actions{margin-top:0;flex:0 0 auto;}
}

/* ---------- 条目卡片（第二部分引用） ---------- */
.entry-card{
  position:relative;display:flex;gap:16px;
  background:var(--panel);border:1px solid var(--line);
  border-radius:var(--r-md);padding:16px;
  transition:transform var(--t) var(--ease),border-color var(--t) var(--ease),box-shadow var(--t) var(--ease);
}
.entry-card:hover{
  transform:translateY(-2px);
  border-color:rgba(201,247,58,.4);
  box-shadow:0 18px 40px rgba(0,0,0,.45);
}
.entry-card .thumb{
  flex:0 0 92px;width:92px;height:92px;border-radius:var(--r-sm);
  overflow:hidden;background:var(--panel-2);
}
.entry-card .thumb img{width:100%;height:100%;object-fit:cover;}
.entry-card h3{font-size:16px;font-weight:700;line-height:1.5;margin-bottom:6px;}
.entry-card p{font-size:13.5px;color:var(--muted);line-height:1.7;}
.link-x{
  position:relative;display:inline-block;font-size:14px;font-weight:600;color:var(--lime);
  padding-left:0;transition:padding-left 160ms var(--ease);
}
.link-x::before{
  content:"";position:absolute;left:0;top:50%;width:0;height:2px;background:var(--lime);
  transform:translateY(-50%);transition:width 160ms var(--ease);
}
.link-x:hover{padding-left:14px;color:#d9ff5c;}
.link-x:hover::before{width:10px;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  background:#08090B;
  border-top:1px solid var(--line);
  padding:64px 0 0;
  margin-top:24px;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(201,247,58,.6),rgba(255,106,43,.4),transparent);
}
.footer-grid{
  display:grid;gap:34px 24px;
  grid-template-columns:1fr;
}
@media (min-width:576px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:992px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.1fr;}}
.footer-about{color:var(--muted);font-size:13.5px;line-height:1.85;margin-top:16px;max-width:320px;}
.footer-title{
  font-size:12.5px;font-weight:700;letter-spacing:.12em;color:var(--muted);
  margin-bottom:16px;
}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{
  color:#C6CCD0;font-size:14px;transition:color var(--t) var(--ease),transform var(--t) var(--ease);
  display:inline-block;
}
.footer-links a:hover{color:var(--lime);transform:translateX(2px);}
.code-inline{
  font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;
}
.footer-bottom{
  margin-top:48px;padding:20px 0 28px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--dim);
}
.footer-bottom a{color:var(--muted);}
.footer-bottom a:hover{color:var(--lime);}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 520ms var(--ease),transform 520ms var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --bg:#0B0C0E;
  --panel:#14161A;
  --panel-2:#191C21;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.18);
  --text:#F2F4F5;
  --muted:#9BA3A9;
  --dim:#5A6165;
  --primary:#C9F73A;
  --accent:#FF6A2B;
  --r-xs:6px;
  --r-sm:8px;
  --r:10px;
  --r-card:14px;
  --r-lg:18px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --space-1:16px;
  --space-2:24px;
  --space-3:48px;
  --space-4:72px;
  --space-5:96px;
  --container:1200px;
  --bs-body-bg:#0B0C0E;
  --bs-body-color:#F2F4F5;
  --bs-primary:#C9F73A;
  --bs-border-color:rgba(255,255,255,.08);
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",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;
  background:var(--bg);
  color:var(--text);
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color 180ms var(--ease),border-color 180ms var(--ease)}
ul,ol{list-style:none;margin:0;padding:0}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.25}
p{margin:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:var(--r-xs)}
::selection{background:rgba(201,247,58,.3);color:#0B0C0E}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:16px;
  padding-right:16px;
}
.section{padding:var(--space-4) 0}
.section-lg{padding:var(--space-5) 0}
.section-sm{padding:var(--space-3) 0}
.mono{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";font-family:"SF Mono",ui-monospace,"Roboto Mono",Menlo,Consolas,monospace}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(11,12,14,.88);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:background 220ms var(--ease),box-shadow 220ms var(--ease);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(201,247,58,.55),rgba(255,106,43,.35),transparent);
  opacity:.45;
  transition:opacity 220ms var(--ease);
}
.site-header.scrolled{background:rgba(11,12,14,.96);box-shadow:0 10px 30px rgba(0,0,0,.5)}
.site-header.scrolled::after{opacity:1}
.nav-shell{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:72px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  position:relative;
  width:26px;height:26px;
  border:2px solid var(--primary);
  border-radius:var(--r-xs);
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
  box-shadow:0 0 14px rgba(201,247,58,.28);
  flex:0 0 auto;
}
.brand-mark::after{
  content:"";
  position:absolute;
  left:5px;top:5px;
  width:12px;height:12px;
  background:linear-gradient(45deg,var(--primary),var(--accent));
  clip-path:polygon(0 0,100% 0,0 100%);
}
.brand-text{
  font-size:16px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--text);
  white-space:nowrap;
}
.brand-text em{font-style:normal;color:var(--primary)}
.nav-desktop{flex:1 1 auto;display:flex;justify-content:center}
.nav-list{display:flex;align-items:center;gap:26px}
.nav-link-x{
  position:relative;
  display:inline-block;
  padding:8px 2px;
  font-size:14px;
  font-weight:600;
  color:var(--muted);
  white-space:nowrap;
}
.nav-link-x::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 200ms var(--ease);
}
.nav-link-x:hover{color:var(--primary)}
.nav-link-x:hover::after{transform:scaleX(1)}
.nav-link-x.active{color:var(--primary)}
.nav-link-x.active::after{transform:scaleX(1);box-shadow:0 6px 14px rgba(201,247,58,.35)}
.header-cta{height:40px;padding:0 18px;font-size:13px}
.burger{
  display:none;
  width:44px;height:44px;
  align-items:center;
  justify-content:center;
  border:1px solid var(--line-strong);
  border-radius:var(--r);
}
.burger span{
  position:relative;
  display:block;
  width:16px;height:2px;
  background:var(--text);
  border-radius:2px;
}
.burger span::before,.burger span::after{
  content:"";
  position:absolute;left:0;
  width:16px;height:2px;
  background:var(--text);
  border-radius:2px;
}
.burger span::before{top:-5px}
.burger span::after{top:5px}

/* 抽屉 */
.nav-drawer{
  background:#0B0C0E !important;
  color:var(--text);
  width:min(86vw,340px) !important;
  border-left:1px solid var(--line);
}
.nav-drawer .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px}
.nav-drawer .offcanvas-body{padding:12px 20px 28px}
.drawer-list{display:flex;flex-direction:column}
.drawer-list a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:52px;
  font-size:15px;
  font-weight:600;
  color:var(--muted);
  border-bottom:1px solid var(--line);
}
.drawer-list a:hover,.drawer-list a.active{color:var(--primary)}
.drawer-list a.active::after{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 10px var(--primary)}
.drawer-cta{margin-top:22px;width:100%}
.drawer-note{margin-top:16px;font-size:12px;color:var(--dim);letter-spacing:.04em}

/* ---------- 按钮 ---------- */
.btn-x{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  font-size:14px;
  font-weight:700;
  border-radius:var(--r);
  clip-path:polygon(6px 0,100% 0,100% calc(100% - 6px),calc(100% - 6px) 100%,0 100%,0 6px);
  transition:transform 180ms var(--ease),filter 180ms var(--ease),box-shadow 180ms var(--ease),border-color 180ms var(--ease),color 180ms var(--ease);
  white-space:nowrap;
}
.btn-primary-x{background:var(--primary);color:#0B0C0E}
.btn-primary-x:hover{filter:brightness(1.08);box-shadow:0 10px 28px rgba(201,247,58,.28);transform:translateY(-1px)}
.btn-primary-x:active{transform:translateY(1px)}
.btn-ghost-x{background:transparent;border:1px solid var(--line-strong);color:var(--text)}
.btn-ghost-x:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px)}
.btn-sm-x{height:40px;padding:0 18px;font-size:13px}
.btn-wide{width:100%}
.link-x{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--primary);
}
.link-x::after{
  content:"";
  position:absolute;
  left:0;bottom:-3px;
  height:1px;
  width:100%;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 200ms var(--ease);
}
.link-x:hover::after{transform:scaleX(1)}
.link-x svg{transition:transform 200ms var(--ease)}
.link-x:hover svg{transform:translateX(3px)}

/* ---------- 标签 / 徽章 ---------- */
.badge-x{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--primary);
  background:rgba(201,247,58,.12);
  border:1px solid rgba(201,247,58,.32);
  border-radius:var(--r-xs);
  clip-path:polygon(5px 0,100% 0,100% calc(100% - 5px),calc(100% - 5px) 100%,0 100%,0 5px);
}
.badge-outline{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  font-size:12px;
  font-weight:600;
  color:var(--muted);
  border:1px solid var(--line-strong);
  border-radius:var(--r-xs);
}
.badge-accent{
  color:var(--accent);
  background:rgba(255,106,43,.12);
  border-color:rgba(255,106,43,.32);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--muted);
  text-transform:uppercase;
}
.eyebrow::before{
  content:"";
  width:16px;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
}
.section-head{max-width:760px;margin-bottom:32px}
.section-head h2{font-size:clamp(24px,2.6vw,32px);margin-bottom:12px}
.section-head p{color:var(--muted);font-size:15px}

/* ---------- 内页 Banner ---------- */
.page-hero{
  position:relative;
  padding:76px 0 40px;
  background-image:linear-gradient(100deg,rgba(11,12,14,.96) 22%,rgba(11,12,14,.72) 62%,rgba(11,12,14,.9) 100%),url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent) 45%,transparent 90%);
  opacity:.55;
}
.crumb{font-size:13px;color:var(--dim);margin-bottom:20px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--primary)}
.crumb .sep{color:var(--dim)}
.crumb .cur{color:var(--primary)}
.page-hero h1{
  font-size:clamp(28px,3.6vw,46px);
  max-width:880px;
  margin-bottom:18px;
}
.page-hero h1 span{color:var(--primary)}
.hero-lead{
  max-width:760px;
  font-size:16px;
  color:var(--muted);
  margin-bottom:26px;
}
.hero-meta{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.hero-meta .mono{font-size:13px;color:var(--muted);border:1px solid var(--line);padding:6px 12px;border-radius:var(--r-sm)}

/* ---------- 横向标签 ---------- */
.tag-bar{
  display:flex;
  gap:10px;
  overflow-x:auto;
  padding:6px 2px 10px;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.tag-bar::-webkit-scrollbar{display:none}
.tag-btn{
  flex:0 0 auto;
  height:40px;
  padding:0 18px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.02em;
  color:var(--muted);
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:999px;
  transition:color 180ms var(--ease),border-color 180ms var(--ease),background 180ms var(--ease),transform 180ms var(--ease);
}
.tag-btn:hover{color:var(--text);border-color:var(--line-strong);transform:translateY(-1px)}
.tag-btn.active{
  color:var(--primary);
  background:rgba(201,247,58,.1);
  border-color:rgba(201,247,58,.4);
}
.tag-count{
  display:inline-block;
  margin-left:8px;
  font-size:12px;
  color:var(--dim);
}
.tag-btn.active .tag-count{color:var(--primary)}

/* ---------- 条目卡 ---------- */
.topic-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
  margin-top:26px;
}
.topic-card{
  position:relative;
  display:grid;
  grid-template-columns:172px minmax(0,1fr);
  gap:18px;
  padding:18px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform 200ms var(--ease),border-color 200ms var(--ease),box-shadow 200ms var(--ease),background 200ms var(--ease);
}
.topic-card::before{
  content:"";
  position:absolute;
  left:0;right:0;top:0;
  height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent),transparent);
  opacity:.55;
  transition:opacity 200ms var(--ease);
}
.topic-card:hover{
  transform:translateY(-2px);
  border-color:rgba(201,247,58,.4);
  box-shadow:var(--shadow);
}
.topic-card:hover::before{opacity:1}
.tc-media{
  position:relative;
  border-radius:var(--r);
  overflow:hidden;
  background:var(--panel-2);
  min-height:140px;
}
.tc-media img{width:100%;height:100%;object-fit:cover;transition:transform 400ms var(--ease)}
.topic-card:hover .tc-media img{transform:scale(1.04)}
.tc-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,12,14,0) 40%,rgba(11,12,14,.55) 100%);
}
.tc-body{display:flex;flex-direction:column;gap:10px;min-width:0}
.tc-top{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.tc-title{
  font-size:17px;
  font-weight:700;
  line-height:1.45;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.tc-desc{
  font-size:14px;
  line-height:1.7;
  color:var(--muted);
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.tc-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px}
.tc-foot .mono{font-size:12px;color:var(--dim)}

/* ---------- 对照模块 ---------- */
.pair-wrap{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:0;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
}
.pair-col{padding:28px 26px}
.pair-col.right{
  border-left:1px solid var(--line);
  border-top:3px solid var(--primary);
  background:linear-gradient(180deg,rgba(201,247,58,.05),transparent 55%);
}
.pair-col.left{border-top:3px solid transparent}
.pair-title{font-size:15px;font-weight:700;margin-bottom:6px}
.pair-sub{font-size:13px;color:var(--dim);margin-bottom:18px}
.pair-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  min-height:58px;
  border-bottom:1px solid var(--line);
  font-size:14px;
  color:var(--muted);
}
.pair-row:last-child{border-bottom:0}
.pair-col.right .pair-row{color:var(--text);border-bottom-color:rgba(201,247,58,.16)}
.pair-icon{
  flex:0 0 auto;
  width:22px;height:22px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:50%;
}
.pair-icon.no{color:var(--dim);border:1px solid var(--line-strong)}
.pair-icon.yes{color:#0B0C0E;background:var(--primary)}

/* ---------- 表单区 ---------- */
.assist-wrap{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:start;
}
.assist-copy h2{font-size:clamp(24px,2.6vw,32px);margin-bottom:16px}
.assist-copy p{color:var(--muted);font-size:15px;margin-bottom:22px}
.check-list{display:flex;flex-direction:column;gap:14px}
.check-list li{display:flex;gap:12px;font-size:14px;color:var(--muted)}
.check-list .dot{
  flex:0 0 auto;
  width:8px;height:8px;
  margin-top:9px;
  background:var(--primary);
  border-radius:2px;
  box-shadow:0 0 8px rgba(201,247,58,.5);
}
.form-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px 26px;
  position:relative;
  overflow:hidden;
}
.form-card::before{
  content:"";
  position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent),transparent);
}
.form-card h3{font-size:19px;margin-bottom:6px}
.form-card .form-note{font-size:13px;color:var(--dim);margin-bottom:22px}
.f-field{margin-bottom:18px}
.f-label{display:block;font-size:13px;color:var(--muted);margin-bottom:8px;letter-spacing:.02em}
.f-input{
  width:100%;
  height:48px;
  padding:0 14px;
  background:#101216;
  color:var(--text);
  border:1px solid var(--line-strong);
  border-radius:var(--r);
  transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease),background 180ms var(--ease);
}
.f-input::placeholder{color:var(--dim)}
.f-input:hover{border-color:rgba(255,255,255,.28)}
.f-input:focus{
  outline:none;
  border-color:var(--primary);
  background:#0E1013;
  box-shadow:0 0 0 4px rgba(201,247,58,.12);
}
.f-check{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:12.5px;
  color:var(--muted);
  margin:4px 0 20px;
  cursor:pointer;
}
.f-check input{position:absolute;opacity:0;width:0;height:0}
.f-box{
  flex:0 0 auto;
  width:18px;height:18px;
  margin-top:2px;
  border:1px solid var(--line-strong);
  border-radius:4px;
  background:#101216;
  position:relative;
  transition:background 180ms var(--ease),border-color 180ms var(--ease);
}
.f-box::after{
  content:"";
  position:absolute;
  left:5px;top:1.5px;
  width:5px;height:10px;
  border:solid #0B0C0E;
  border-width:0 2px 2px 0;
  transform:rotate(45deg) scale(0);
  transition:transform 160ms var(--ease);
}
.f-check input:checked + .f-box{background:var(--primary);border-color:var(--primary)}
.f-check input:checked + .f-box::after{transform:rotate(45deg) scale(1)}
.f-check input:focus-visible + .f-box{outline:2px solid var(--primary);outline-offset:2px}
.form-msg{
  display:none;
  margin-top:14px;
  font-size:13px;
  color:var(--primary);
}
.form-msg.show{display:block}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:var(--space-5);
  background:#0A0B0D;
  border-top:1px solid var(--line);
  padding:56px 0 0;
}
.site-footer::before{
  content:"";
  position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(201,247,58,.6),rgba(255,106,43,.4),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.1fr;
  gap:32px;
  padding-bottom:42px;
}
.footer-about{font-size:14px;color:var(--muted);margin-top:16px;max-width:320px}
.footer-title{
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--muted);
  margin-bottom:16px;
}
.footer-links{display:flex;flex-direction:column;gap:12px}
.footer-links a,.footer-links span{font-size:14px;color:var(--muted);transition:color 180ms var(--ease),transform 180ms var(--ease)}
.footer-links a{display:inline-block}
.footer-links a:hover{color:var(--primary);transform:translateX(2px)}
.code-inline{font-size:13px;color:var(--dim);font-variant-numeric:tabular-nums}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  align-items:center;
  justify-content:space-between;
  border-top:1px solid var(--line);
  padding:20px 0 26px;
  font-size:13px;
  color:var(--dim);
}
.footer-bottom a{color:var(--muted)}
.footer-bottom a:hover{color:var(--primary)}

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

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .topic-card{grid-template-columns:150px minmax(0,1fr)}
}
@media (max-width:991px){
  .nav-desktop{display:none}
  .burger{display:inline-flex}
  .header-cta{display:none}
  .section{padding:56px 0}
  .section-lg{padding:72px 0}
  .page-hero{padding:56px 0 32px}
  .topic-grid{grid-template-columns:1fr;gap:18px}
  .pair-wrap{grid-template-columns:1fr}
  .pair-col.right{border-left:0;border-top:1px solid var(--line);border-top-width:3px}
  .assist-wrap{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
}
@media (max-width:575px){
  body{font-size:15px}
  .brand-text{font-size:14px}
  .brand-text em{display:inline}
  .nav-shell{min-height:64px}
  .topic-card{grid-template-columns:1fr;padding:14px}
  .tc-media{min-height:170px;aspect-ratio:16/9}
  .hero-meta .mono{font-size:12px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}