/* roulang page: index */
:root{
  --bg:#0A0B0D;
  --bg-2:#111318;
  --panel:#171A20;
  --neon:#35E8B0;
  --neon-hi:#5CF3C4;
  --neon-soft:rgba(53,232,176,.45);
  --accent:#FF5A36;
  --text:#F3F5F7;
  --text-2:#98A2B3;
  --text-3:#5C6470;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.16);
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow:0 0 0 1px var(--line), 0 1px 0 rgba(255,255,255,.03) inset;
  --shadow-neon:0 0 24px -6px var(--neon-soft);
  --space-sec:96px;
  --bs-body-bg:var(--bg);
  --bs-body-color:var(--text);
  --bs-primary:var(--neon);
  --bs-border-color:var(--line);
  --bs-border-radius:var(--radius-card);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:1.0625rem;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--text-2);text-decoration:none;transition:color .25s ease}
a:hover,a:focus-visible{color:var(--neon)}
button{font-family:inherit}
h1,h2,h3,h4{letter-spacing:-.02em;line-height:1.2;color:var(--text);margin:0}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
.mono{font-family:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:var(--space-sec) 0;position:relative}
.section-bordered{border-top:1px solid var(--line)}
.sec-head{margin-bottom:32px;display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px}
.sec-title{font-size:clamp(1.6rem,2.6vw,2.25rem);font-weight:800}
.sec-desc{color:var(--text-2);font-size:.9375rem;max-width:560px;margin:10px 0 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:"JetBrains Mono",ui-monospace,monospace;
  font-size:.75rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--neon);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--neon);display:inline-block}
.muted{color:var(--text-2)}
.muted-3{color:var(--text-3)}
.link-neon{color:var(--neon);position:relative}
.link-neon::after{content:"";position:absolute;left:0;bottom:-3px;width:0;height:1px;background:var(--neon);transition:width .3s ease}
.link-neon:hover::after{width:100%}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;
  padding:0 22px;border-radius:var(--radius-btn);font-size:.9375rem;font-weight:600;border:1px solid transparent;
  cursor:pointer;transition:transform .2s ease,background-color .25s ease,border-color .25s ease,box-shadow .25s ease,color .25s ease;
}
.btn:active{transform:translateY(1px)}
.btn-neon{background:var(--neon);color:#06231B;box-shadow:var(--shadow-neon)}
.btn-neon:hover{background:var(--neon-hi);color:#06231B;transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:rgba(53,232,176,.55);color:var(--neon)}
.btn-ghost:hover{background:rgba(53,232,176,.08);color:var(--neon);transform:translateY(-1px)}
.btn-quiet{background:transparent;border-color:var(--line-2);color:var(--text)}
.btn-quiet:hover{border-color:var(--neon);color:var(--neon);transform:translateY(-1px)}
.btn:focus-visible,a:focus-visible,summary:focus-visible,.nav-toggle:focus-visible{outline:2px solid var(--neon);outline-offset:2px}

/* ---------- badges ---------- */
.badge-tag{display:inline-flex;align-items:center;gap:6px;font-size:.6875rem;letter-spacing:.06em;
  padding:4px 11px;border-radius:999px;border:1px solid rgba(255,90,54,.55);color:var(--accent);background:transparent}
.badge-count{font-family:"JetBrains Mono",ui-monospace,monospace;font-size:.6875rem;color:var(--text-2);
  border:1px solid var(--line);border-radius:999px;padding:3px 10px;white-space:nowrap}

/* ---------- header / nav ---------- */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(10,11,13,.86);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.site-header::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;opacity:0;transition:opacity .3s ease;
  background:linear-gradient(90deg,transparent,var(--neon),transparent)}
.site-header.is-scrolled::after{opacity:1}
.nav-bar{height:64px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:800;font-size:1.0625rem;letter-spacing:-.01em}
.brand:hover{color:var(--text)}
.brand-mark{width:12px;height:12px;border-radius:3px;background:var(--neon);box-shadow:var(--shadow-neon);flex:none}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-link-item{position:relative;padding:20px 14px;font-size:.95rem;color:var(--text-2);display:inline-block}
.nav-link-item::after{content:"";position:absolute;left:14px;right:14px;bottom:12px;height:2px;background:var(--neon);
  transform:scaleX(0);transform-origin:left;transition:transform .25s ease;box-shadow:var(--shadow-neon)}
.nav-link-item:hover{color:var(--text)}
.nav-link-item:hover::after,.nav-link-item.active::after{transform:scaleX(1)}
.nav-link-item.active{color:var(--neon)}
.nav-right{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line-2);border-radius:10px;background:transparent;color:var(--text)}
.nav-toggle i{font-size:1rem}
.nav-panel{display:flex;align-items:center;gap:20px}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:110px 0 84px;border-bottom:1px solid var(--line)}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.5}
.hero-bg::after{content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(10,11,13,.97) 0%,rgba(10,11,13,.88) 42%,rgba(10,11,13,.42) 100%)}
.hero-inner{position:relative;z-index:1;max-width:760px}
.hero h1{font-size:clamp(2.4rem,5vw,4rem);font-weight:800;line-height:1.12;letter-spacing:-.02em;margin:18px 0 0}
.hero h1 em{font-style:normal;color:var(--neon);text-shadow:var(--shadow-neon)}
.hero-sub{color:var(--text-2);font-size:1.0625rem;margin:18px 0 0;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-stats{display:flex;flex-wrap:wrap;gap:0;margin-top:48px;border-top:1px solid var(--line);padding-top:26px}
.stat{padding-right:34px;margin-right:34px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0;margin-right:0;padding-right:0}
.stat-num{font-family:"JetBrains Mono",ui-monospace,monospace;font-size:1.75rem;color:var(--text);font-weight:700;line-height:1.1}
.stat-label{font-size:.8125rem;color:var(--text-3);margin-top:6px}

/* ---------- value cards ---------- */
.value-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.value-card{grid-column:span 4;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease}
.value-card:hover{transform:translateY(-4px);border-color:rgba(53,232,176,.45);box-shadow:var(--shadow-neon)}
.value-card.wide{grid-column:span 7}
.value-card.small{grid-column:span 5}
.value-num{font-family:"JetBrains Mono",ui-monospace,monospace;font-size:.75rem;color:var(--neon);letter-spacing:.18em}
.value-title{font-size:1.25rem;font-weight:700;margin:14px 0 8px}
.value-text{color:var(--text-2);font-size:.9375rem;line-height:1.8;margin:0}
.value-list{margin-top:16px;display:flex;flex-direction:column;gap:8px}
.value-list li{color:var(--text-2);font-size:.875rem;padding-left:18px;position:relative}
.value-list li::before{content:"";position:absolute;left:0;top:.7em;width:8px;height:1px;background:var(--neon)}

/* ---------- collection list ---------- */
.collection-list{border-top:1px solid var(--line)}
.collection-item{display:grid;grid-template-columns:70px 1fr auto 24px;align-items:center;gap:24px;
  padding:24px 12px;border-bottom:1px solid var(--line);transition:background-color .25s ease,padding-left .25s ease}
.collection-item:hover{background:rgba(255,255,255,.025);padding-left:18px}
.collection-item .idx{font-family:"JetBrains Mono",ui-monospace,monospace;font-size:1rem;color:var(--text-3);transition:color .25s ease}
.collection-item:hover .idx{color:var(--neon)}
.collection-title{font-size:1.125rem;font-weight:700}
.collection-note{color:var(--text-2);font-size:.875rem;margin-top:4px}
.collection-meta{display:flex;align-items:center;gap:12px}
.collection-arrow{color:var(--text-3);transition:transform .25s ease,color .25s ease}
.collection-item:hover .collection-arrow{transform:translateX(4px);color:var(--neon)}

/* ---------- featured ---------- */
.feature-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}
.feature-card{position:relative;overflow:hidden;border:1px solid var(--line);border-radius:var(--radius-card);
  background:var(--panel);min-height:230px;display:flex;flex-direction:column;justify-content:flex-end;
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease}
.feature-card:hover{transform:translateY(-4px);border-color:rgba(53,232,176,.45);box-shadow:var(--shadow-neon)}
.feature-card:nth-child(1){grid-row:span 2;min-height:auto}
.feature-media{position:absolute;inset:0;z-index:0}
.feature-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.feature-card:hover .feature-media img{transform:scale(1.03)}
.feature-media::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,11,13,.15) 0%,rgba(17,19,24,.92) 72%)}
.feature-body{position:relative;z-index:1;padding:22px}
.feature-body h3{font-size:1.125rem;font-weight:700;margin:10px 0 8px}
.feature-body p{color:var(--text-2);font-size:.875rem;margin:0}

/* ---------- news (CMS) ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease}
.news-card:hover{transform:translateY(-4px);border-color:rgba(53,232,176,.45);box-shadow:var(--shadow-neon)}
.news-thumb{position:relative;aspect-ratio:16/9;background:linear-gradient(135deg,#14171d,#0d0f13);overflow:hidden}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(23,26,32,.9) 100%)}
.news-thumb .badge-tag{position:absolute;left:14px;top:14px;z-index:2;background:rgba(10,11,13,.7)}
.news-body{padding:20px;display:flex;flex-direction:column;flex:1}
.news-title{font-size:1.0625rem;font-weight:700;line-height:1.5;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-title a{color:var(--text)}
.news-title a:hover{color:var(--neon)}
.news-excerpt{color:var(--text-2);font-size:.875rem;line-height:1.75;margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:.8125rem;color:var(--text-3);border-top:1px solid var(--line);padding-top:14px}
.news-meta .mono{font-size:.8125rem}
.news-meta i{transition:transform .25s ease}
.news-card:hover .news-meta i{transform:translateX(4px);color:var(--neon)}
.empty-state{grid-column:1/-1;border:1px dashed var(--line-2);border-radius:var(--radius-card);padding:56px 24px;text-align:center;color:var(--text-2)}
.empty-state i{font-size:1.5rem;color:var(--neon);display:block;margin-bottom:12px}

/* ---------- rail ---------- */
.rail-wrap{position:relative}
.rail{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(260px,1fr);gap:20px;overflow-x:auto;
  scroll-snap-type:x mandatory;padding:4px 4px 18px;scrollbar-width:thin}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:99px}
.rail-card{scroll-snap-align:start;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:20px;transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease}
.rail-card:hover{transform:translateY(-4px);border-color:rgba(53,232,176,.45);box-shadow:var(--shadow-neon)}
.rail-card h3{font-size:1.0625rem;font-weight:700;margin:14px 0 8px}
.rail-card p{color:var(--text-2);font-size:.875rem;margin:0}
.rail-thumb{aspect-ratio:16/10;border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line)}
.rail-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.rail-card:hover .rail-thumb img{transform:scale(1.03)}
.rail-nav{display:flex;gap:10px}
.rail-btn{width:44px;height:44px;border-radius:10px;border:1px solid var(--line-2);background:transparent;color:var(--text-2);
  display:inline-flex;align-items:center;justify-content:center;transition:color .25s ease,border-color .25s ease}
.rail-btn:hover{color:var(--neon);border-color:var(--neon)}
.rail-wrap::before,.rail-wrap::after{content:"";position:absolute;top:0;bottom:18px;width:56px;pointer-events:none;z-index:2}
.rail-wrap::before{left:0;background:linear-gradient(90deg,var(--bg),transparent)}
.rail-wrap::after{right:0;background:linear-gradient(270deg,var(--bg),transparent)}

/* ---------- share cta ---------- */
.share-bar{position:relative;overflow:hidden;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:30px 28px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px}
.share-bar::before{content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(115deg,transparent 0 34px,rgba(53,232,176,.09) 34px 35px);pointer-events:none}
.share-bar h2{font-size:1.375rem;font-weight:800;position:relative}
.share-bar p{color:var(--text-2);font-size:.9375rem;margin:8px 0 0;position:relative}
.share-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;position:relative}
.faq-item::before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--neon);transform:scaleY(0);
  transform-origin:top;transition:transform .3s ease}
.faq-item[open]::before{transform:scaleY(1)}
.faq-item summary{list-style:none;cursor:pointer;padding:20px 54px 20px 22px;font-size:1.05rem;font-weight:500;position:relative;color:var(--text)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary i{position:absolute;right:22px;top:50%;transform:translateY(-50%) rotate(0deg);color:var(--text-2);transition:transform .3s ease,color .3s ease}
.faq-item[open] summary i{transform:translateY(-50%) rotate(180deg);color:var(--neon)}
.faq-item[open] summary{color:var(--neon)}
.faq-answer{padding:0 22px 20px;color:var(--text-2);font-size:.9375rem;line-height:1.85}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg-2);padding:64px 0 0;margin-top:24px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:1.0625rem;color:var(--text)}
.footer-brand .brand-mark{background:var(--neon)}
.footer-about{color:var(--text-2);font-size:.875rem;line-height:1.85;margin-top:14px;max-width:320px}
.footer-title{font-size:.8125rem;letter-spacing:.18em;text-transform:uppercase;color:var(--text-3);
  font-family:"JetBrains Mono",ui-monospace,monospace;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:.9375rem;color:var(--text-2)}
.footer-links a:hover{color:var(--neon)}
.footer-contact{color:var(--text-2);font-size:.875rem;line-height:1.95}
.footer-bottom{margin-top:48px;border-top:1px solid var(--line);padding:22px 0;display:flex;flex-wrap:wrap;
  gap:12px;justify-content:space-between;align-items:center;color:var(--text-3);font-size:.8125rem}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .42s cubic-bezier(.22,.8,.28,1),transform .42s cubic-bezier(.22,.8,.28,1)}
.reveal.is-in{opacity:1;transform:none}
.reveal.d1{transition-delay:.06s}
.reveal.d2{transition-delay:.12s}
.reveal.d3{transition-delay:.18s}

/* ---------- responsive ---------- */
@media (max-width:1200px){
  .feature-grid{grid-template-columns:1fr 1fr}
  .feature-card:nth-child(1){grid-column:span 2;grid-row:auto;min-height:280px}
}
@media (max-width:992px){
  :root{--space-sec:72px}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .nav-panel{position:fixed;left:0;right:0;top:64px;bottom:0;background:rgba(10,11,13,.98);
    flex-direction:column;align-items:flex-start;justify-content:flex-start;gap:0;padding:24px;display:none;
    border-top:1px solid var(--line);overflow-y:auto}
  body.nav-open .nav-panel{display:flex}
  .nav-panel .nav-links{flex-direction:column;align-items:flex-start;width:100%;gap:0}
  .nav-link-item{padding:18px 0;font-size:1.25rem;font-weight:700;width:100%;border-bottom:1px solid var(--line)}
  .nav-link-item::after{left:0;right:auto;width:28px;bottom:10px}
  .nav-cta{width:100%;margin-top:20px}
  .nav-cta .btn{width:100%}
  .value-card,.value-card.wide,.value-card.small{grid-column:span 12}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  :root{--space-sec:56px}
  .hero{padding:72px 0 56px}
  .hero-stats{gap:20px 0}
  .stat{padding-right:22px;margin-right:22px}
  .feature-grid{grid-template-columns:1fr}
  .feature-card:nth-child(1){grid-column:auto}
  .collection-item{grid-template-columns:48px 1fr;gap:14px;padding:20px 6px}
  .collection-meta{grid-column:2;justify-content:flex-start}
  .collection-arrow{display:none}
  .share-bar{padding:24px 20px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
}
@media (max-width:576px){
  .container{padding:0 18px}
  .news-grid{grid-template-columns:1fr}
  .hero-stats{flex-direction:column;gap:18px}
  .stat{border-right:0;padding-right:0;margin-right:0;border-bottom:1px solid var(--line);padding-bottom:14px;width:100%}
  .stat:last-child{border-bottom:0;padding-bottom:0}
  .rail-wrap::before,.rail-wrap::after{display:none}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --bg:#0A0B0D;
  --bg-2:#111318;
  --panel:#171A20;
  --neon:#35E8B0;
  --neon-hover:#5CF3C4;
  --accent:#FF5A36;
  --text:#F3F5F7;
  --text-2:#98A2B3;
  --text-3:#5C6470;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --glow:0 0 24px -6px rgba(53,232,176,.45);
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --bs-body-bg:#0A0B0D;
  --bs-body-color:#F3F5F7;
  --bs-border-color:rgba(255,255,255,.08);
  --bs-border-radius:14px;
  --bs-link-color:#98A2B3;
  --bs-link-hover-color:#35E8B0;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;padding:0;background:var(--bg);color:var(--text);
  font-family:var(--sans);font-size:1.0625rem;line-height:1.9;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--text-2);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--neon)}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (max-width:575.98px){.container{padding:0 16px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(10,11,13,.86);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(53,232,176,.55),transparent);
  opacity:.55;pointer-events:none;
}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:1.02rem;letter-spacing:.01em;white-space:nowrap}
.brand:hover{color:#fff}
.brand-mark{width:10px;height:10px;border-radius:3px;background:var(--neon);box-shadow:var(--glow);display:inline-block;flex:0 0 auto}
.nav-panel{display:flex;align-items:center;gap:30px}
.nav-links{display:flex;align-items:center;gap:22px}
.nav-link-item{position:relative;color:var(--text-2);font-size:.95rem;padding:6px 0;white-space:nowrap}
.nav-link-item:hover{color:#fff}
.nav-link-item.active{color:#fff}
.nav-link-item.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;border-radius:2px;
  background:var(--neon);box-shadow:var(--glow);
}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-right{display:none}
.nav-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:transparent;color:var(--text);font-size:1.05rem;cursor:pointer;
  transition:border-color .2s,color .2s;
}
.nav-toggle:hover{border-color:rgba(53,232,176,.5);color:var(--neon)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:.62rem 1.3rem;border-radius:var(--r-btn);
  font-size:.95rem;font-weight:600;line-height:1.2;cursor:pointer;
  border:1px solid transparent;text-decoration:none;
  transition:background .25s,color .25s,border-color .25s,transform .2s,box-shadow .25s;
}
.btn:focus-visible{outline:2px solid var(--neon);outline-offset:2px}
.btn-neon{background:var(--neon);border-color:var(--neon);color:#06110D}
.btn-neon:hover{background:var(--neon-hover);border-color:var(--neon-hover);color:#06110D;transform:translateY(-1px);box-shadow:var(--glow)}
.btn-neon:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:rgba(53,232,176,.5);color:var(--neon)}
.btn-ghost:hover{background:rgba(53,232,176,.08);border-color:var(--neon-hover);color:var(--neon-hover);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-quiet{background:transparent;border-color:var(--line-strong);color:var(--text-2)}
.btn-quiet:hover{color:#fff;border-color:rgba(53,232,176,.5)}
.btn-sm{min-height:38px;padding:.45rem 1rem;font-size:.875rem}

/* ---------- layout blocks ---------- */
.section{padding:96px 0}
.section-tight{padding:64px 0}
@media (max-width:991.98px){.section{padding:72px 0}.section-tight{padding:52px 0}}
@media (max-width:575.98px){.section{padding:56px 0}.section-tight{padding:44px 0}}

/* ---------- article head ---------- */
.article-head{
  position:relative;padding:44px 0 40px;
  background:
    radial-gradient(900px 320px at 12% -30%,rgba(53,232,176,.10),transparent 70%),
    linear-gradient(180deg,#0E1013 0%,rgba(10,11,13,0) 100%);
  border-bottom:1px solid var(--line);
}
.crumbs{font-size:.85rem;color:var(--text-3);margin-bottom:22px}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs li{display:flex;align-items:center;gap:8px;min-width:0}
.crumbs li + li::before{content:"/";color:var(--text-3);opacity:.6}
.crumbs a{color:var(--text-2)}
.crumbs a:hover{color:var(--neon)}
.crumbs li[aria-current] span{color:var(--text-2);max-width:46vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:inline-block;vertical-align:bottom}
.badge-cat{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;font-size:.78rem;font-weight:500;
  color:var(--accent);border:1px solid rgba(255,90,54,.45);background:rgba(255,90,54,.06);
  letter-spacing:.02em;
}
.article-title{
  margin:18px 0 0;max-width:900px;
  font-size:clamp(1.9rem,3.6vw,2.9rem);font-weight:900;line-height:1.2;
  letter-spacing:-.015em;color:#fff;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  margin-top:20px;font-size:.85rem;color:var(--text-3);
}
.article-meta .mono{color:var(--text-2);font-size:.82rem}
.meta-dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);opacity:.7}
.meta-sep{width:1px;height:14px;background:var(--line-strong)}
.article-cover{
  margin-top:32px;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line);position:relative;
}
.article-cover img{width:100%;height:clamp(200px,32vw,380px);object-fit:cover}
.article-cover::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,11,13,0) 40%,rgba(10,11,13,.75) 100%);
}

/* ---------- article layout ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:56px;max-width:1120px;margin:0 auto}
.article-main{min-width:0}
@media (min-width:1200px){
  .article-layout{grid-template-columns:minmax(0,760px) 264px;grid-template-areas:"main side";gap:60px;align-items:start}
  .article-main{grid-area:main}
  .article-side{grid-area:side}
}

/* ---------- article content ---------- */
.article-content{max-width:760px;color:#DEE4EA;font-size:1.0625rem;line-height:1.9}
.article-content > *:first-child{margin-top:0}
.article-content p{margin:0 0 1.25em}
.article-content h2{
  position:relative;margin:2.4em 0 .9em;padding-left:18px;
  font-size:clamp(1.3rem,2vw,1.6rem);font-weight:700;line-height:1.4;color:#fff;letter-spacing:-.01em;
}
.article-content h2::before{
  content:"";position:absolute;left:0;top:.42em;width:3px;height:1em;border-radius:2px;
  background:var(--neon);box-shadow:var(--glow);
}
.article-content h3{margin:1.9em 0 .7em;font-size:1.15rem;font-weight:600;color:#fff}
.article-content a{color:var(--neon);border-bottom:1px solid rgba(53,232,176,.35)}
.article-content a:hover{color:var(--neon-hover);border-color:var(--neon-hover)}
.article-content img{max-width:100%;height:auto;border-radius:var(--r-img);margin:1.6em 0}
.article-content figure{margin:1.8em 0}
.article-content figcaption{margin-top:10px;font-size:.82rem;color:var(--text-3);text-align:center}
.article-content blockquote{
  margin:1.7em 0;padding:16px 22px;background:var(--bg-2);
  border-left:3px solid var(--neon);border-radius:0 10px 10px 0;color:var(--text-2);
}
.article-content blockquote p:last-child{margin-bottom:0}
.article-content ul,.article-content ol{padding-left:1.4em;margin:0 0 1.3em}
.article-content ul li{list-style:disc;margin:.4em 0}
.article-content ol li{list-style:decimal;margin:.4em 0}
.article-content li::marker{color:var(--neon)}
.article-content table{width:100%;border-collapse:collapse;margin:1.7em 0;font-size:.94rem}
.article-content th,.article-content td{padding:10px 14px;border-bottom:1px solid var(--line);text-align:left}
.article-content thead th{background:var(--bg-2);color:#fff;font-weight:600;border-bottom:1px solid var(--line-strong)}
.article-content tbody tr:nth-child(even){background:rgba(255,255,255,.02)}
.article-content pre{
  margin:1.7em 0;padding:16px;background:var(--bg-2);border:1px solid var(--line);
  border-radius:var(--r-img);overflow:auto;font-size:.88rem;line-height:1.7;
}
.article-content code{font-family:var(--mono);font-size:.88em;background:rgba(53,232,176,.08);color:var(--neon);padding:.15em .4em;border-radius:6px}
.article-content pre code{background:none;color:#C9D3DC;padding:0}
.article-content hr{margin:2.4em 0;border:0;border-top:1px solid var(--line)}
.article-content strong{color:#fff}

/* empty state */
.empty-box{
  max-width:760px;padding:40px 28px;border:1px dashed var(--line-strong);border-radius:var(--r-card);
  background:var(--bg-2);text-align:center;
}
.empty-box i{font-size:1.6rem;color:var(--text-3)}
.empty-box h2{margin:14px 0 8px;font-size:1.25rem;font-weight:700;color:#fff}
.empty-box p{color:var(--text-2);font-size:.95rem;margin-bottom:20px}

/* ---------- side card ---------- */
.side-card{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;margin-bottom:20px;
}
.side-card-title{
  display:flex;align-items:center;gap:8px;
  font-size:.8rem;font-weight:600;letter-spacing:.14em;color:var(--text-3);
  text-transform:uppercase;margin-bottom:14px;font-family:var(--mono);
}
.side-card-title::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--neon);box-shadow:var(--glow)}
.toc-list li + li{margin-top:2px}
.toc-list a{
  display:flex;gap:10px;padding:8px 10px;border-radius:8px;
  font-size:.9rem;color:var(--text-2);border-left:2px solid transparent;transition:.2s;
}
.toc-list a:hover{background:rgba(255,255,255,.04);color:#fff}
.toc-list a.current{background:rgba(53,232,176,.08);color:var(--neon);border-left-color:var(--neon)}
.toc-num{font-family:var(--mono);font-size:.78rem;color:var(--text-3);padding-top:3px;flex:0 0 auto}
.toc-list a.current .toc-num{color:var(--neon)}
.toc-text{overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;line-height:1.5}
.toc-empty{font-size:.85rem;color:var(--text-3);padding:6px 0}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 0;font-size:.92rem;color:var(--text-2);border-bottom:1px solid var(--line);
}
.side-links a:last-child{border-bottom:0}
.side-links a i{font-size:.72rem;transition:transform .2s;color:var(--text-3)}
.side-links a:hover{color:var(--neon)}
.side-links a:hover i{transform:translateX(4px);color:var(--neon)}
.side-note{font-size:.82rem;line-height:1.75;color:var(--text-3)}

/* ---------- actions ---------- */
.article-actions{
  max-width:760px;margin-top:48px;padding-top:28px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
}
.article-actions .back-link{margin-left:auto;font-size:.9rem;color:var(--text-2);border-bottom:1px solid transparent}
.article-actions .back-link:hover{color:var(--neon);border-bottom-color:rgba(53,232,176,.5)}
@media (max-width:575.98px){.article-actions .back-link{margin-left:0}}

/* ---------- related ---------- */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
@media (max-width:991.98px){.related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:575.98px){.related-grid{grid-template-columns:1fr}}
.card-item{
  display:flex;flex-direction:column;height:100%;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:transform .3s cubic-bezier(.22,.8,.28,1),border-color .3s,box-shadow .3s;
}
.card-item:hover{transform:translateY(-4px);border-color:rgba(53,232,176,.55);box-shadow:var(--glow)}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.card-item:hover .card-media img{transform:scale(1.03)}
.card-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,11,13,0) 45%,rgba(23,26,32,.95) 100%)}
.card-tag{
  position:absolute;top:12px;left:12px;z-index:2;
  padding:4px 10px;border-radius:999px;font-size:.72rem;color:var(--accent);
  border:1px solid rgba(255,90,54,.45);background:rgba(10,11,13,.6);
}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-title{font-size:1.06rem;font-weight:700;line-height:1.5;color:#fff}
.card-item:hover .card-title{color:var(--neon)}
.card-desc{font-size:.9rem;line-height:1.75;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:.78rem;color:var(--text-3);font-family:var(--mono)}
.card-meta i{transition:transform .2s}
.card-item:hover .card-meta i{transform:translateX(4px);color:var(--neon)}

/* ---------- section head ---------- */
.section-head{margin-bottom:32px;max-width:720px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);
  font-size:.76rem;letter-spacing:.18em;color:var(--neon);margin-bottom:12px;
}
.eyebrow::before{content:"";width:20px;height:1px;background:var(--neon);box-shadow:var(--glow)}
.section-title{font-size:clamp(1.5rem,2.4vw,2.1rem);font-weight:800;line-height:1.25;color:#fff;letter-spacing:-.01em}
.section-sub{margin-top:10px;font-size:.95rem;color:var(--text-2)}

/* ---------- cta strip ---------- */
.cta-strip{
  position:relative;overflow:hidden;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  padding:32px 36px;border-radius:var(--r-card);
  background:var(--bg-2);border:1px solid var(--line);
}
.cta-strip::before{
  content:"";position:absolute;top:-40%;right:-10%;width:340px;height:340px;
  background:linear-gradient(135deg,rgba(53,232,176,.16),rgba(53,232,176,0) 70%);
  transform:rotate(20deg);pointer-events:none;
}
.cta-strip::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(53,232,176,.6),transparent);
}
.cta-copy{position:relative;z-index:1;max-width:560px}
.cta-copy h2{font-size:clamp(1.2rem,2vw,1.6rem);font-weight:800;color:#fff;line-height:1.35}
.cta-copy p{margin-top:8px;font-size:.92rem;color:var(--text-2)}
.cta-btns{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:12px}
.cta-hint{width:100%;font-size:.8rem;color:var(--neon);min-height:0;margin-top:2px}
.cta-hint[hidden]{display:none}
@media (max-width:575.98px){.cta-strip{padding:26px 20px}}

/* ---------- footer ---------- */
.site-footer{margin-top:96px;background:var(--bg-2);border-top:1px solid var(--line);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px}
@media (max-width:991.98px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media (max-width:575.98px){.footer-grid{grid-template-columns:1fr}}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:1.02rem}
.footer-brand:hover{color:var(--neon)}
.footer-about{margin-top:14px;font-size:.88rem;line-height:1.8;color:var(--text-2);max-width:340px}
.footer-title{font-size:.8rem;font-family:var(--mono);letter-spacing:.16em;color:var(--text-3);margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:.9rem;color:var(--text-2)}
.footer-links a:hover{color:var(--neon)}
.footer-contact{font-size:.86rem;line-height:1.8;color:var(--text-2)}
.footer-bottom{
  margin-top:52px;padding:20px 0;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:.8rem;color:var(--text-3);
}
.footer-bottom .mono{font-size:.78rem;color:var(--text-3)}

/* ---------- responsive nav ---------- */
@media (max-width:991.98px){
  .nav-bar{min-height:56px}
  .nav-right{display:block}
  .nav-panel{
    position:fixed;left:0;right:0;top:56px;bottom:0;z-index:999;
    flex-direction:column;align-items:flex-start;justify-content:flex-start;
    gap:26px;padding:32px 24px 40px;overflow-y:auto;
    background:rgba(10,11,13,.98);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .25s ease,transform .25s ease,visibility .25s;
  }
  .nav-panel.open{opacity:1;visibility:visible;transform:none}
  .nav-links{flex-direction:column;align-items:flex-start;gap:4px;width:100%}
  .nav-link-item{width:100%;padding:14px 0;font-size:1.3rem;font-weight:600;color:var(--text)}
  .nav-link-item.active::after{bottom:8px;left:0;width:34px;right:auto}
  .nav-cta{width:100%}
  .nav-cta .btn{width:100%}
}
@media (max-width:575.98px){
  .article-title{font-size:1.65rem}
  .crumbs li[aria-current] span{max-width:60vw}
}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .42s cubic-bezier(.22,.8,.28,1),transform .42s cubic-bezier(.22,.8,.28,1)}
.reveal.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}
}

/* roulang page: category1 */
:root{
  --bg:#0A0B0D;
  --bg-2:#111318;
  --panel:#171A20;
  --neon:#35E8B0;
  --neon-hi:#5CF3C4;
  --orange:#FF5A36;
  --text:#F3F5F7;
  --text-2:#98A2B3;
  --text-3:#5C6470;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --glow:0 0 24px -6px rgba(53,232,176,.45);
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --radius-pill:999px;
  --mono:"JetBrains Mono","SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --container:1200px;
  --section-gap:96px;
  --bs-body-bg:#0A0B0D;
  --bs-body-color:#F3F5F7;
  --bs-border-color:rgba(255,255,255,.08);
  --bs-border-radius:14px;
  --bs-primary:#35E8B0;
  --bs-link-color:#98A2B3;
  --bs-link-hover-color:#35E8B0;
}
*,*::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(--sans);
  font-size:1.0625rem;
  line-height:1.9;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--text-2);text-decoration:none;transition:color .25s ease;}
a:hover{color:var(--neon);}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:800;color:var(--text);letter-spacing:-.02em;}
p{margin:0 0 1.1em;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
::selection{background:rgba(53,232,176,.28);color:#fff;}
a:focus-visible,button:focus-visible{
  outline:2px solid var(--neon);
  outline-offset:2px;
  border-radius:4px;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  font-size:.95rem;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .25s ease,background-color .25s ease,color .25s ease,border-color .25s ease,box-shadow .25s ease;
  white-space:nowrap;
}
.btn-neon{
  background:var(--neon);
  color:#08110E;
  box-shadow:var(--glow);
}
.btn-neon:hover{
  background:var(--neon-hi);
  color:#08110E;
  transform:translateY(-1px);
  box-shadow:0 0 28px -4px rgba(53,232,176,.6);
}
.btn-neon:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;
  color:var(--neon);
  border-color:rgba(53,232,176,.55);
}
.btn-ghost:hover{
  background:rgba(53,232,176,.08);
  color:var(--neon-hi);
  border-color:var(--neon);
  transform:translateY(-1px);
}
.btn-ghost:active{transform:translateY(1px);}
.btn-plain{
  background:transparent;
  color:var(--text-2);
  border-color:var(--line-2);
}
.btn-plain:hover{color:var(--text);border-color:rgba(255,255,255,.28);transform:translateY(-1px);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(10,11,13,.86);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(53,232,176,.85),rgba(255,90,54,.6),transparent);
  opacity:0;
  transition:opacity .35s ease;
}
.site-header.is-scrolled::after{opacity:1;}
.nav-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:64px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  font-size:1.0625rem;
  letter-spacing:-.01em;
  color:var(--text);
}
.brand:hover{color:var(--text);}
.brand-mark{
  width:12px;height:12px;
  border-radius:3px;
  background:var(--neon);
  box-shadow:var(--glow);
  flex:0 0 auto;
}
.nav-panel{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:32px;
  flex:1 1 auto;
}
.nav-links{display:flex;align-items:center;gap:28px;}
.nav-link-item{
  position:relative;
  font-size:.95rem;
  color:var(--text-2);
  padding:6px 0;
}
.nav-link-item::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--neon);
  border-radius:2px;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .3s cubic-bezier(.22,.8,.28,1);
  box-shadow:var(--glow);
}
.nav-link-item:hover{color:var(--text);}
.nav-link-item:hover::after{transform:scaleX(1);}
.nav-link-item.active{color:var(--text);font-weight:600;}
.nav-link-item.active::after{transform:scaleX(1);}
.nav-cta{display:flex;align-items:center;gap:12px;}
.nav-cta .btn{min-height:40px;padding:0 18px;font-size:.9rem;}
.nav-right{display:none;}
.nav-toggle{
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  background:transparent;
  border:1px solid var(--line-2);
  border-radius:10px;
  color:var(--text);
  font-size:1.05rem;
  cursor:pointer;
  transition:border-color .25s ease,color .25s ease;
}
.nav-toggle:hover{border-color:var(--neon);color:var(--neon);}

/* ---------- 页头 ---------- */
.page-hero{
  position:relative;
  padding:56px 0 72px;
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(880px 420px at 12% -10%,rgba(53,232,176,.14),transparent 62%),
    radial-gradient(620px 340px at 92% 8%,rgba(255,90,54,.10),transparent 64%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:1;}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:.85rem;
  color:var(--text-3);
  margin-bottom:26px;
}
.breadcrumb-list li{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb-list li+li::before{
  content:"/";
  color:var(--text-3);
  font-family:var(--mono);
}
.breadcrumb-list a{color:var(--text-2);}
.breadcrumb-list a:hover{color:var(--neon);}
.breadcrumb-list .current{color:var(--text);}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--mono);
  font-size:.78rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--neon);
  border:1px solid rgba(53,232,176,.34);
  border-radius:var(--radius-pill);
  padding:5px 14px;
  margin-bottom:22px;
}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:56px;
  align-items:center;
}
h1{
  font-size:clamp(2rem,4.4vw,3.25rem);
  line-height:1.14;
  letter-spacing:-.02em;
  margin-bottom:20px;
}
.hero-sub{
  font-size:1.0625rem;
  color:var(--text-2);
  max-width:34em;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-media{
  position:relative;
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid var(--line);
  aspect-ratio:16/11;
  background:var(--panel);
}
.hero-media img{
  width:100%;height:100%;
  object-fit:cover;
  opacity:.82;
}
.hero-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(10,11,13,.15) 0%,rgba(10,11,13,.72) 100%);
}
.hero-media .media-tag{
  position:absolute;
  left:18px;bottom:18px;
  z-index:2;
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--mono);
  font-size:.76rem;
  letter-spacing:.12em;
  color:var(--neon);
  background:rgba(10,11,13,.7);
  border:1px solid rgba(53,232,176,.34);
  border-radius:var(--radius-pill);
  padding:6px 14px;
}

/* ---------- 分栏主体 ---------- */
.cat-layout{
  display:grid;
  grid-template-columns:minmax(0,236px) minmax(0,1fr);
  gap:56px;
  padding-bottom:24px;
}
.cat-side{align-self:start;}
.toc{
  position:sticky;
  top:88px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:linear-gradient(180deg,rgba(23,26,32,.9),rgba(17,19,24,.9));
  padding:20px 18px;
}
.toc-title{
  font-family:var(--mono);
  font-size:.76rem;
  letter-spacing:.18em;
  color:var(--text-3);
  text-transform:uppercase;
  margin-bottom:12px;
}
.toc a{
  display:flex;
  align-items:center;
  gap:12px;
  padding:11px 2px;
  font-size:.9rem;
  color:var(--text-2);
  border-bottom:1px dashed rgba(255,255,255,.06);
  transition:color .25s ease,padding-left .25s ease;
}
.toc a:last-child{border-bottom:none;}
.toc a .num{
  font-family:var(--mono);
  font-size:.78rem;
  color:var(--text-3);
  transition:color .25s ease;
}
.toc a:hover{color:var(--text);padding-left:6px;}
.toc a:hover .num{color:var(--neon);}
.toc a.active{color:var(--neon);}
.toc a.active .num{color:var(--neon);}

.section-block{
  padding:52px 0;
  border-top:1px solid var(--line);
}
.section-block:first-child{border-top:none;padding-top:0;}
.section-head{
  display:flex;
  align-items:baseline;
  gap:14px;
  margin-bottom:14px;
}
.section-num{
  font-family:var(--mono);
  font-size:.86rem;
  color:var(--neon);
  letter-spacing:.08em;
}
.section-block h2{
  font-size:clamp(1.5rem,2.6vw,2.05rem);
  line-height:1.3;
}
.section-lead{
  color:var(--text-2);
  max-width:40em;
  margin-bottom:26px;
}
.point-list{display:grid;gap:12px;max-width:44em;}
.point-list li{
  position:relative;
  padding-left:24px;
  color:var(--text-2);
  font-size:1rem;
}
.point-list li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:8px;height:8px;
  border-radius:2px;
  background:var(--neon);
  box-shadow:var(--glow);
}
.point-list strong{color:var(--text);font-weight:600;}

.entry-group{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px;
  margin-top:6px;
}
.entry-item{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--bg-2);
  padding:20px 22px;
  transition:transform .3s cubic-bezier(.22,.8,.28,1),border-color .3s ease,box-shadow .3s ease;
}
.entry-item:hover{
  transform:translateY(-4px);
  border-color:rgba(53,232,176,.5);
  box-shadow:var(--glow);
}
.entry-item .ei-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:8px;
}
.entry-item h3{font-size:1.125rem;font-weight:700;}
.entry-item p{
  margin:0;
  font-size:.94rem;
  color:var(--text-2);
  line-height:1.75;
}
.tag{
  display:inline-flex;
  align-items:center;
  font-family:var(--mono);
  font-size:.72rem;
  letter-spacing:.08em;
  padding:3px 10px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(255,90,54,.5);
  color:var(--orange);
  background:transparent;
  white-space:nowrap;
}
.tag-neon{
  border-color:rgba(53,232,176,.45);
  color:var(--neon);
}

.split-media{
  display:grid;
  grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);
  gap:40px;
  align-items:center;
  margin-top:8px;
}
.split-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--radius-img);
  border:1px solid var(--line);
}
.split-media .media-caption{
  font-size:.82rem;
  color:var(--text-3);
  margin-top:10px;
  font-family:var(--mono);
  letter-spacing:.04em;
}

/* ---------- FAQ ---------- */
.faq-section{
  padding:var(--section-gap) 0 0;
  border-top:1px solid var(--line);
  margin-top:var(--section-gap);
}
.faq-section h2{
  font-size:clamp(1.6rem,2.6vw,2.25rem);
  margin-bottom:10px;
}
.faq-intro{color:var(--text-2);margin-bottom:30px;max-width:40em;}
.accordion-item{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  margin-bottom:12px;
  overflow:hidden;
}
.accordion-button{
  background:transparent;
  color:var(--text);
  font-size:1.05rem;
  font-weight:500;
  padding:20px 22px;
  box-shadow:none;
  gap:16px;
}
.accordion-button:not(.collapsed){
  background:var(--bg-2);
  color:var(--neon);
  box-shadow:none;
}
.accordion-button:focus{box-shadow:none;border-color:transparent;}
.accordion-button::after{
  content:"+";
  background-image:none;
  font-family:var(--mono);
  font-size:1.25rem;
  line-height:1;
  width:auto;height:auto;
  color:var(--text-3);
  transform:none;
  transition:color .25s ease,transform .25s ease;
  margin-left:auto;
}
.accordion-button:not(.collapsed)::after{
  content:"−";
  color:var(--neon);
  transform:none;
}
.accordion-body{
  padding:0 22px 22px 22px;
  border-left:2px solid var(--neon);
  margin-left:0;
  color:var(--text-2);
  font-size:.95rem;
  line-height:1.85;
}
.accordion-body p:last-child{margin-bottom:0;}

/* ---------- CTA 条 ---------- */
.cta-bar{
  position:relative;
  margin-top:var(--section-gap);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:linear-gradient(120deg,rgba(23,26,32,.95),rgba(17,19,24,.95));
  padding:30px 34px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  overflow:hidden;
}
.cta-bar::before{
  content:"";
  position:absolute;
  right:-60px;top:-60px;
  width:240px;height:240px;
  background:linear-gradient(135deg,rgba(53,232,176,.22),rgba(255,90,54,.14));
  transform:rotate(45deg);
  pointer-events:none;
}
.cta-bar .cta-copy{position:relative;z-index:1;}
.cta-bar h2{
  font-size:clamp(1.25rem,2vw,1.6rem);
  margin-bottom:6px;
}
.cta-bar p{margin:0;color:var(--text-2);font-size:.95rem;}
.cta-actions{
  position:relative;
  z-index:1;
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.copy-tip{
  margin-top:12px;
  font-size:.85rem;
  color:var(--neon);
  font-family:var(--mono);
  min-height:1.3em;
  opacity:0;
  transition:opacity .3s ease;
}
.copy-tip.show{opacity:1;}

/* ---------- 相关分类 ---------- */
.related-section{
  padding:var(--section-gap) 0 0;
  border-top:1px solid var(--line);
  margin-top:var(--section-gap);
}
.related-section h2{
  font-size:clamp(1.5rem,2.4vw,2rem);
  margin-bottom:10px;
}
.related-section .section-lead{margin-bottom:28px;}
.related-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:22px;
}
.related-card{
  display:block;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--bg-2);
  overflow:hidden;
  color:var(--text);
  transition:transform .3s cubic-bezier(.22,.8,.28,1),border-color .3s ease,box-shadow .3s ease;
}
.related-card:hover{
  transform:translateY(-4px);
  border-color:rgba(53,232,176,.5);
  box-shadow:var(--glow);
  color:var(--text);
}
.related-card .rc-media{
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--panel);
}
.related-card .rc-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .4s cubic-bezier(.22,.8,.28,1);
  opacity:.85;
}
.related-card:hover .rc-media img{transform:scale(1.03);}
.related-card .rc-body{padding:20px 22px 24px;}
.related-card h3{font-size:1.1rem;margin-bottom:8px;}
.related-card p{margin:0 0 12px;color:var(--text-2);font-size:.92rem;line-height:1.75;}
.related-card .rc-more{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:.88rem;
  color:var(--neon);
  font-family:var(--mono);
}
.related-card .rc-more i{transition:transform .3s ease;}
.related-card:hover .rc-more i{transform:translateX(4px);}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:var(--section-gap);
  border-top:1px solid var(--line);
  background:var(--bg-2);
  padding:64px 0 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  color:var(--text);
  font-size:1.0625rem;
  margin-bottom:16px;
}
.footer-brand:hover{color:var(--text);}
.footer-about{
  color:var(--text-2);
  font-size:.92rem;
  line-height:1.8;
  margin:0;
  max-width:26em;
}
.footer-title{
  font-family:var(--mono);
  font-size:.76rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--text-3);
  margin-bottom:16px;
}
.footer-links{display:grid;gap:10px;}
.footer-links a{font-size:.92rem;color:var(--text-2);}
.footer-links a:hover{color:var(--neon);}
.footer-contact{
  color:var(--text-2);
  font-size:.9rem;
  line-height:1.8;
  margin:0;
}
.footer-bottom{
  margin-top:46px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:.85rem;
  color:var(--text-3);
}

/* ---------- 动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .42s cubic-bezier(.22,.8,.28,1),transform .42s cubic-bezier(.22,.8,.28,1);
}
.reveal.is-visible{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .cat-layout{grid-template-columns:minmax(0,210px) minmax(0,1fr);gap:40px;}
  .hero-grid{gap:40px;}
}
@media (max-width:991.98px){
  :root{--section-gap:72px;}
  .nav-panel{
    position:fixed;
    inset:56px 0 0 0;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:22px;
    padding:28px 24px 40px;
    background:rgba(10,11,13,.98);
    border-top:1px solid var(--line);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .3s ease,transform .3s ease,visibility .3s ease;
    overflow-y:auto;
    z-index:1040;
  }
  .nav-panel.open{opacity:1;visibility:visible;transform:none;}
  .nav-links{flex-direction:column;align-items:stretch;gap:0;}
  .nav-link-item{
    font-size:1.2rem;
    padding:18px 0;
    border-bottom:1px solid var(--line);
  }
  .nav-link-item::after{display:none;}
  .nav-link-item.active{color:var(--neon);}
  .nav-cta{margin-top:8px;}
  .nav-cta .btn{width:100%;min-height:48px;font-size:.98rem;}
  .nav-right{display:flex;}
  .nav-bar{min-height:56px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero-media{aspect-ratio:16/9;}
  .cat-layout{grid-template-columns:1fr;gap:32px;}
  .cat-side{order:2;}
  .toc{position:static;}
  .entry-group{grid-template-columns:1fr;}
  .split-media{grid-template-columns:1fr;gap:24px;}
  .cta-bar{flex-direction:column;align-items:flex-start;padding:26px 24px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}
@media (max-width:767.98px){
  :root{--section-gap:56px;}
  .container{padding-left:18px;padding-right:18px;}
  .page-hero{padding:36px 0 48px;}
  .section-block{padding:40px 0;}
  .related-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
}
@media (max-width:575.98px){
  body{font-size:1rem;}
  h1{font-size:clamp(1.72rem,7vw,2.2rem);}
  .hero-actions .btn{width:100%;}
  .accordion-button{font-size:.98rem;padding:16px 16px;}
  .accordion-body{padding:0 16px 18px 16px;font-size:.92rem;}
  .entry-item{padding:18px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --bg:#0A0B0D;
  --bg-2:#111318;
  --panel:#171A20;
  --panel-2:#1C2027;
  --neon:#35E8B0;
  --neon-hi:#5CF3C4;
  --accent:#FF5A36;
  --text:#F3F5F7;
  --muted:#98A2B3;
  --dim:#5C6470;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --glow:0 0 24px -6px rgba(53,232,176,.45);
  --glow-soft:0 0 32px -10px rgba(53,232,176,.35);
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  --space-section:96px;
  --bs-body-bg:var(--bg);
  --bs-body-color:var(--text);
  --bs-primary:var(--neon);
  --bs-border-color:var(--line);
  --bs-border-radius:var(--radius-card);
  --bs-link-color:var(--text);
  --bs-link-hover-color:var(--neon);
  --bs-font-sans-serif:var(--sans);
}
*{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(--sans);
  font-size:1.0625rem;
  line-height:1.9;
  letter-spacing:.01em;
  padding-top:64px;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(720px 420px at 88% -8%,rgba(53,232,176,.10),transparent 62%),
    radial-gradient(560px 380px at 4% 8%,rgba(255,90,54,.06),transparent 60%);
  z-index:0;
}
img{max-width:100%;display:block;object-fit:cover;}
a{color:var(--text);text-decoration:none;transition:color .25s ease,opacity .25s ease;}
a:hover{color:var(--neon);}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.2;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px;}
::selection{background:rgba(53,232,176,.28);color:#fff;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}
.mono{font-family:var(--mono);letter-spacing:.02em;}

/* ============ 导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1000;
  background:rgba(10,11,13,.86);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(53,232,176,.55),rgba(255,90,54,.35),transparent);
  opacity:.7;
}
.nav-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:64px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  font-size:1.0625rem;
  letter-spacing:-.01em;
  color:var(--text);
  white-space:nowrap;
}
.brand:hover{color:var(--text);}
.brand-mark{
  width:12px;height:12px;
  border-radius:3px;
  background:var(--neon);
  box-shadow:var(--glow);
  flex:0 0 auto;
}
.nav-panel{
  display:flex;
  align-items:center;
  gap:28px;
  flex:1 1 auto;
  justify-content:flex-end;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
}
.nav-link-item{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:38px;
  padding:0 14px;
  font-size:.95rem;
  color:var(--muted);
  border-radius:8px;
  transition:color .25s ease,background .25s ease;
}
.nav-link-item::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:4px;
  height:2px;
  border-radius:2px;
  background:var(--neon);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .28s cubic-bezier(.22,.8,.28,1);
}
.nav-link-item:hover{color:var(--text);background:rgba(255,255,255,.03);}
.nav-link-item:hover::after{transform:scaleX(1);}
.nav-link-item.active{color:var(--text);}
.nav-link-item.active::after{transform:scaleX(1);box-shadow:var(--glow);}
.nav-cta{display:flex;align-items:center;gap:12px;}
.nav-right{display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:10px;
  border:1px solid var(--line-strong);
  background:transparent;
  color:var(--text);
  font-size:1rem;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:border-color .25s ease,color .25s ease,background .25s ease;
}
.nav-toggle:hover{border-color:var(--neon);color:var(--neon);}

/* ============ 按钮 ============ */
.btn-neon,
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 20px;
  border-radius:var(--radius-btn);
  font-size:.95rem;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s ease,background .25s ease,color .25s ease,border-color .25s ease,box-shadow .3s ease;
  white-space:nowrap;
}
.btn-neon{
  background:var(--neon);
  color:#06110D;
  box-shadow:var(--glow-soft);
}
.btn-neon:hover{
  background:var(--neon-hi);
  color:#06110D;
  transform:translateY(-1px);
  box-shadow:var(--glow);
}
.btn-neon:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;
  color:var(--neon);
  border-color:rgba(53,232,176,.5);
}
.btn-ghost:hover{
  background:rgba(53,232,176,.08);
  color:var(--neon-hi);
  border-color:var(--neon);
  transform:translateY(-1px);
}
.btn-ghost:active{transform:translateY(1px);}
.btn-line{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--muted);
  font-size:.95rem;
  border-bottom:1px solid var(--line-strong);
  padding-bottom:2px;
  transition:color .25s ease,border-color .25s ease;
}
.btn-line:hover{color:var(--neon);border-color:var(--neon);}

/* ============ 页头 Hero ============ */
.page-hero{
  position:relative;
  padding:76px 0 64px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  opacity:.28;
  z-index:0;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(10,11,13,.96) 0%,rgba(10,11,13,.82) 46%,rgba(10,11,13,.6) 100%);
  z-index:0;
}
.hero-inner{position:relative;z-index:2;max-width:760px;}
.breadcrumb-nav{margin-bottom:22px;}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:.875rem;
  color:var(--dim);
}
.breadcrumb-list li{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb-list li+li::before{content:"/";color:var(--dim);}
.breadcrumb-list a{color:var(--muted);}
.breadcrumb-list a:hover{color:var(--neon);}
.breadcrumb-list .current{color:var(--text);}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--mono);
  font-size:.75rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--neon);
  border:1px solid rgba(53,232,176,.32);
  border-radius:999px;
  padding:5px 12px;
  margin-bottom:20px;
  background:rgba(53,232,176,.05);
}
h1.hero-title{
  font-size:clamp(2.4rem,5vw,4rem);
  line-height:1.12;
  letter-spacing:-.02em;
  font-weight:800;
  margin-bottom:18px;
}
.hero-lead{
  font-size:1.0625rem;
  color:var(--muted);
  max-width:36em;
  margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px;}
.hero-stats{
  display:flex;
  flex-wrap:wrap;
  gap:0;
  border-top:1px solid var(--line);
  padding-top:22px;
}
.stat{
  padding-right:28px;
  margin-right:28px;
  border-right:1px solid var(--line);
  min-width:120px;
}
.stat:last-child{border-right:none;margin-right:0;padding-right:0;}
.stat-num{
  display:block;
  font-family:var(--mono);
  font-size:1.6rem;
  font-weight:700;
  color:var(--neon);
  line-height:1.3;
}
.stat-label{display:block;font-size:.85rem;color:var(--dim);}

/* ============ 通用板块 ============ */
.section{
  padding:var(--space-section) 0;
  position:relative;
}
.section + .section{border-top:1px solid var(--line);}
.section-head{max-width:720px;margin-bottom:32px;}
.section-head h2{
  font-size:clamp(1.6rem,2.6vw,2.25rem);
  margin-bottom:12px;
  position:relative;
  padding-left:16px;
}
.section-head h2::before{
  content:"";
  position:absolute;
  left:0;top:.28em;bottom:.24em;
  width:3px;
  border-radius:2px;
  background:var(--neon);
  box-shadow:var(--glow);
}
.section-lead{color:var(--muted);font-size:1rem;margin:0;}
.eyebrow-sm{
  display:inline-block;
  font-family:var(--mono);
  font-size:.75rem;
  letter-spacing:.18em;
  color:var(--accent);
  margin-bottom:10px;
}

/* ============ 合集概览卡 ============ */
.overview-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.ov-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.ov-card:hover{
  transform:translateY(-4px);
  border-color:rgba(53,232,176,.45);
  box-shadow:var(--glow-soft);
}
.ov-card .mono-no{
  display:block;
  font-family:var(--mono);
  font-size:.8rem;
  color:var(--dim);
  margin-bottom:14px;
}
.ov-card h3{font-size:1.25rem;margin-bottom:10px;}
.ov-card p{color:var(--muted);font-size:.95rem;margin-bottom:16px;}
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:999px;
  font-size:.78rem;
  border:1px solid rgba(255,90,54,.45);
  color:#FFB6A2;
  background:rgba(255,90,54,.07);
}
.chip-neon{
  border-color:rgba(53,232,176,.42);
  color:var(--neon);
  background:rgba(53,232,176,.07);
}

/* ============ Zigzag 图文带 ============ */
.zigzag{display:flex;flex-direction:column;gap:72px;}
.zig-row{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:48px;
  align-items:center;
}
.zig-row.reverse{grid-template-columns:5fr 7fr;}
.zig-row.reverse .zig-media{order:-1;}
.zig-media{
  position:relative;
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid var(--line);
}
.zig-media img{
  width:100%;
  height:340px;
  transition:transform .5s cubic-bezier(.22,.8,.28,1);
}
.zig-row:hover .zig-media img{transform:scale(1.03);}
.zig-media::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:56%;
  background:linear-gradient(180deg,transparent,rgba(10,11,13,.78));
  pointer-events:none;
}
.zig-no{
  display:inline-block;
  font-size:.8rem;
  color:var(--neon);
  border-bottom:1px solid rgba(53,232,176,.4);
  padding-bottom:2px;
  margin-bottom:14px;
}
.zig-text h3{font-size:1.5rem;margin-bottom:14px;}
.zig-text > p{color:var(--muted);}
.dot-list{margin-top:18px;display:flex;flex-direction:column;gap:10px;}
.dot-list li{
  position:relative;
  padding-left:18px;
  font-size:.95rem;
  color:var(--muted);
}
.dot-list li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--neon);
  box-shadow:var(--glow);
}

/* ============ 对比表 ============ */
.table-wrap{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow-x:auto;
  background:var(--panel);
}
table.cmp-table{
  width:100%;
  min-width:660px;
  border-collapse:collapse;
  font-size:.95rem;
}
.cmp-table thead th{
  text-align:left;
  font-weight:700;
  font-size:.85rem;
  letter-spacing:.06em;
  color:var(--muted);
  padding:18px 22px;
  border-bottom:1px solid var(--line-strong);
  white-space:nowrap;
}
.cmp-table tbody td{
  padding:18px 22px;
  border-bottom:1px solid var(--line);
  color:var(--muted);
  vertical-align:top;
}
.cmp-table tbody tr:last-child td{border-bottom:none;}
.cmp-table tbody tr:hover td{background:rgba(255,255,255,.02);}
.cmp-table td:first-child{
  color:var(--text);
  font-weight:600;
}
.cmp-table .mono{color:var(--neon);font-size:.875rem;}
.lvl{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:var(--mono);
  font-size:.8rem;
  color:var(--neon);
}
.lvl i{font-size:.5rem;}

/* ============ 时间轴 ============ */
.timeline{
  position:relative;
  padding-left:30px;
  display:flex;
  flex-direction:column;
  gap:30px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:6px;top:8px;bottom:8px;
  width:1px;
  background:linear-gradient(180deg,rgba(53,232,176,.6),rgba(53,232,176,.05));
}
.timeline li{position:relative;}
.timeline li::before{
  content:"";
  position:absolute;
  left:-30px;top:9px;
  width:13px;height:13px;
  border-radius:50%;
  background:var(--bg);
  border:2px solid var(--neon);
  box-shadow:var(--glow);
}
.tl-date{
  display:block;
  font-size:.8rem;
  color:var(--neon);
  letter-spacing:.08em;
  margin-bottom:6px;
}
.timeline strong{display:block;font-size:1.05rem;margin-bottom:6px;font-weight:700;}
.timeline p{color:var(--muted);font-size:.95rem;margin:0;}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;}
.accordion-item{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card) !important;
  margin-bottom:14px;
  overflow:hidden;
}
.accordion-button{
  background:transparent;
  color:var(--text);
  font-size:1.05rem;
  font-weight:500;
  padding:20px 22px;
  box-shadow:none !important;
}
.accordion-button:not(.collapsed){
  color:var(--neon);
  background:rgba(53,232,176,.04);
}
.accordion-button::after{
  background-image:none;
  content:"+";
  font-family:var(--mono);
  font-size:1.15rem;
  color:var(--neon);
  width:auto;height:auto;
  transform:none;
  display:flex;align-items:center;justify-content:center;
  transition:transform .3s ease;
}
.accordion-button:not(.collapsed)::after{content:"–";transform:none;}
.accordion-button:focus{border-color:transparent;}
.accordion-body{
  padding:0 22px 22px 22px;
  color:var(--muted);
  font-size:.95rem;
  line-height:1.85;
  border-left:2px solid var(--neon);
  margin-left:22px;
  padding-left:18px;
}

/* ============ CTA 条 ============ */
.cta-bar{
  position:relative;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:30px 32px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  overflow:hidden;
}
.cta-bar::before{
  content:"";
  position:absolute;
  right:-60px;top:-60px;
  width:220px;height:220px;
  background:linear-gradient(135deg,rgba(53,232,176,.16),transparent 70%);
  transform:rotate(18deg);
  pointer-events:none;
}
.cta-bar::after{
  content:"";
  position:absolute;
  left:0;bottom:0;height:1px;width:46%;
  background:linear-gradient(90deg,var(--neon),transparent);
  opacity:.7;
}
.cta-text h3{font-size:1.35rem;margin-bottom:8px;}
.cta-text p{color:var(--muted);font-size:.95rem;margin:0;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:2;}

/* ============ 互链 ============ */
.link-cards{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.link-card{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.link-card:hover{
  transform:translateY(-4px);
  border-color:rgba(53,232,176,.45);
  box-shadow:var(--glow-soft);
  color:var(--text);
}
.link-card h3{font-size:1.15rem;margin-bottom:6px;}
.link-card p{color:var(--muted);font-size:.9rem;margin:0;}
.link-card i{
  color:var(--neon);
  font-size:1rem;
  transition:transform .3s ease;
  flex:0 0 auto;
}
.link-card:hover i{transform:translateX(4px);}

/* ============ 页脚 ============ */
.site-footer{
  border-top:1px solid var(--line);
  background:var(--bg-2);
  padding:64px 0 0;
  margin-top:var(--space-section);
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.4fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  font-size:1.05rem;
  color:var(--text);
  margin-bottom:16px;
}
.footer-brand:hover{color:var(--neon);}
.footer-about{color:var(--muted);font-size:.9rem;max-width:30em;margin:0;}
.footer-title{
  font-size:.8rem;
  font-family:var(--mono);
  letter-spacing:.14em;
  color:var(--dim);
  text-transform:uppercase;
  margin-bottom:16px;
}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{color:var(--muted);font-size:.92rem;}
.footer-links a:hover{color:var(--neon);}
.footer-contact{color:var(--muted);font-size:.9rem;margin:0;max-width:26em;}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:.85rem;
  color:var(--dim);
}
.footer-bottom .mono{color:var(--dim);letter-spacing:.06em;}

/* ============ 动效 ============ */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .42s cubic-bezier(.22,.8,.28,1),transform .42s cubic-bezier(.22,.8,.28,1);
}
.reveal.is-visible{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* ============ 响应式 ============ */
@media (max-width:1200px){
  .zig-row,.zig-row.reverse{grid-template-columns:1fr 1fr;gap:36px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;}
}
@media (max-width:992px){
  :root{--space-section:72px;}
  body{padding-top:56px;}
  .nav-bar{height:56px;}
  .nav-toggle{display:inline-flex;}
  .nav-panel{
    position:fixed;
    inset:56px 0 0 0;
    background:rgba(9,10,12,.98);
    flex-direction:column;
    align-items:flex-start;
    justify-content:flex-start;
    gap:8px;
    padding:32px 24px 40px;
    transform:translateY(-12px);
    opacity:0;
    visibility:hidden;
    transition:opacity .28s ease,transform .28s ease,visibility .28s;
    overflow-y:auto;
  }
  .nav-open .nav-panel{opacity:1;transform:none;visibility:visible;}
  .nav-links{flex-direction:column;align-items:stretch;width:100%;gap:4px;}
  .nav-link-item{
    height:auto;
    padding:16px 4px;
    font-size:1.35rem;
    font-weight:700;
    color:var(--text);
    border-bottom:1px solid var(--line);
    border-radius:0;
  }
  .nav-link-item::after{left:4px;right:auto;width:28px;bottom:6px;}
  .nav-cta{width:100%;margin-top:20px;}
  .nav-cta .btn-neon{width:100%;}
  .overview-grid{grid-template-columns:1fr 1fr;}
  .zig-row,.zig-row.reverse{grid-template-columns:1fr;gap:24px;}
  .zig-row.reverse .zig-media{order:0;}
  .zig-media img{height:280px;}
  .link-cards{grid-template-columns:1fr;}
  .cta-bar{flex-direction:column;align-items:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  h1.hero-title{font-size:clamp(2rem,8vw,2.6rem);}
  .page-hero{padding:52px 0 44px;}
  .overview-grid{grid-template-columns:1fr;}
  .hero-stats{gap:18px 0;}
  .stat{
    padding-right:20px;margin-right:20px;
    min-width:calc(50% - 20px);
  }
  .stat:nth-child(2n){border-right:none;margin-right:0;padding-right:0;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .zig-media img{height:210px;}
  .cta-bar{padding:24px 20px;}
  .cta-actions{width:100%;}
  .cta-actions .btn-neon,.cta-actions .btn-ghost{width:100%;}
  .accordion-body{margin-left:16px;padding-left:14px;}
}