/* roulang page: index */
:root{
  --ink:#111214;
  --ink-2:#3A3E45;
  --paper:#F5F4F0;
  --paper-2:#FFFFFF;
  --line:#E2E0D9;
  --lime:#C6F24E;
  --lime-ink:#0C0D0E;
  --flame:#FF5A2B;
  --mute:#8A8C86;
  --radius-card:16px;
  --radius-img:20px;
  --radius-pill:999px;
  --shadow:0 1px 2px rgba(17,18,20,.04), 0 18px 40px -24px rgba(17,18,20,.22);
  --shadow-hover:0 1px 2px rgba(17,18,20,.06), 0 26px 52px -24px rgba(17,18,20,.3);
  --ease:cubic-bezier(.2,.7,.3,1);
  --space-section:112px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
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:2px}
.mono{font-family:ui-monospace,"JetBrains Mono","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-section) 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--mute);
  text-transform:uppercase;margin-bottom:16px;
}
.eyebrow::before{content:"";width:8px;height:8px;background:var(--lime);display:block;border-radius:2px}
.h2{
  font-size:clamp(24px,3vw,38px);font-weight:800;letter-spacing:-.02em;line-height:1.15;
  color:var(--ink);max-width:22em;
}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.lead{font-size:16px;line-height:1.85;color:var(--ink-2);max-width:38em;margin-top:16px}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform 180ms var(--ease),background-color 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease),box-shadow 180ms var(--ease);
  border:1px solid transparent;white-space:nowrap;
}
.btn-primary{background:var(--lime);color:var(--lime-ink);border-color:var(--lime)}
.btn-primary:hover{background:#B9E63F;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0) scale(.99)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0) scale(.99)}
.btn-dark{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn-dark:hover{background:#000;transform:translateY(-1px)}
.btn-dark:active{transform:translateY(0) scale(.99)}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-outline-light:hover{border-color:var(--lime);color:var(--lime);transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}
.btn.is-loading{opacity:.75;pointer-events:none}
.btn .arrow{transition:transform 180ms var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}

/* tags */
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--radius-pill);
  background:var(--paper);border:1px solid var(--line);
  font-size:12px;font-weight:600;letter-spacing:.04em;color:var(--ink-2);
}
.tag-accent{background:var(--lime);border-color:var(--lime);color:var(--lime-ink)}
.tag-alert{background:rgba(255,90,43,.12);border-color:rgba(255,90,43,.35);color:#B33B14}

/* ticker */
.ticker{background:var(--ink);color:#fff}
.ticker-inner{display:flex;align-items:center;gap:20px;min-height:40px;padding-top:6px;padding-bottom:6px;flex-wrap:wrap}
.ticker-label{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.08em;color:rgba(255,255,255,.72)}
.ticker-label .dot{width:6px;height:6px;border-radius:50%;background:var(--lime);display:inline-block}
.ticker-clock{display:flex;gap:10px;flex-wrap:nowrap}
.ticker-clock .unit{display:inline-flex;align-items:baseline;gap:4px;white-space:nowrap}
.ticker-clock b{font-size:15px;font-weight:700;color:var(--lime);letter-spacing:.02em}
.ticker-clock em{font-style:normal;font-size:11px;color:rgba(255,255,255,.6)}
.ticker-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.ticker-link{font-size:12px;font-weight:600;letter-spacing:.04em;color:rgba(255,255,255,.86);display:inline-flex;align-items:center;gap:6px}
.ticker-link .arrow{transition:transform 180ms var(--ease)}
.ticker-link:hover{color:var(--lime)}
.ticker-link:hover .arrow{transform:translateX(4px)}

/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(245,244,240,.92);
  border-bottom:1px solid var(--line);
  transition:box-shadow 220ms var(--ease);
}
.site-header.is-scrolled{box-shadow:0 10px 30px -22px rgba(17,18,20,.45)}
.nav-wrap{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:16px;height:16px;border-radius:4px;background:var(--ink);position:relative;overflow:hidden;flex-shrink:0;
}
.brand-mark::after{
  content:"";position:absolute;right:-4px;bottom:-4px;width:14px;height:14px;background:var(--lime);
  transform:rotate(45deg);
}
.brand-text{font-size:16px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.brand-text small{display:block;font-size:11px;font-weight:600;letter-spacing:.14em;color:var(--mute);line-height:1.2}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-link{
  position:relative;padding:8px 14px;font-size:15px;font-weight:600;color:var(--ink-2);
  border-radius:var(--radius-pill);transition:color 180ms var(--ease),background-color 180ms var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform 180ms var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{background:var(--ink);color:#fff}
.nav-link.active::after{display:none}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:var(--radius-pill);border:1px solid var(--line);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);transition:transform 220ms var(--ease),opacity 180ms var(--ease)}
.menu-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle.is-open span:nth-child(2){opacity:0}
.menu-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* mobile nav */
.mobile-nav{
  position:fixed;inset:0;z-index:80;background:var(--ink);color:#fff;
  padding:24px;display:flex;flex-direction:column;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 220ms;
}
.mobile-nav.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.mobile-nav .mobile-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid rgba(255,255,255,.14)}
.mobile-nav .brand-text small{color:rgba(255,255,255,.55)}
.mobile-nav .brand-mark{background:#fff}
.mobile-close{width:44px;height:44px;border-radius:var(--radius-pill);border:1px solid rgba(255,255,255,.3);color:#fff;font-size:18px;line-height:1}
.mobile-links{margin-top:28px;display:flex;flex-direction:column;gap:4px;flex:1}
.mobile-links a{font-size:23px;line-height:1.6;font-weight:700;color:#fff;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.08)}
.mobile-links a:hover,.mobile-links a.active{color:var(--lime)}
.mobile-nav .btn{margin-top:20px;width:100%}

/* hero */
.hero{position:relative;overflow:hidden;background:var(--ink)}
.hero-media{position:absolute;inset:0}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-veil{
  position:absolute;inset:0;
  background:linear-gradient(to top,rgba(17,18,20,.88) 0%,rgba(17,18,20,.66) 45%,rgba(17,18,20,.2) 100%);
}
.hero-inner{position:relative;z-index:2;padding-top:120px;padding-bottom:72px;color:#fff;min-height:min(88vh,700px);display:flex;flex-direction:column;justify-content:flex-end}
.hero-brand{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.14em;
  color:rgba(255,255,255,.78);margin-bottom:20px;
}
.hero-brand::before{content:"";width:18px;height:2px;background:var(--lime);display:block}
.hero h1{
  font-size:clamp(34px,5.6vw,66px);font-weight:800;letter-spacing:-.03em;line-height:1.05;color:#fff;
  max-width:16em;word-break:break-word;
}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.7;color:rgba(255,255,255,.86);max-width:30em}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}
.hero-stats{display:flex;gap:44px;flex-wrap:wrap;margin-top:56px;padding-top:24px;border-top:1px solid rgba(255,255,255,.16)}
.hero-stats li{display:flex;flex-direction:column;gap:6px}
.hero-stats b{font-size:22px;font-weight:700;color:var(--lime);letter-spacing:-.01em}
.hero-stats span{font-size:12px;font-weight:600;letter-spacing:.08em;color:rgba(255,255,255,.62)}

/* numbered points */
.points{border-top:1px solid var(--line)}
.point{
  display:flex;gap:40px;align-items:flex-start;padding:40px 0;border-bottom:1px solid var(--line);
  transition:background-color 220ms var(--ease);
}
.point-num{
  font-size:clamp(40px,7vw,96px);font-weight:800;line-height:1;letter-spacing:-.04em;
  color:transparent;-webkit-text-stroke:1px rgba(17,18,20,.22);
  min-width:2.4em;transition:color 220ms var(--ease),-webkit-text-stroke-color 220ms var(--ease);
}
.point-body{flex:1;max-width:46em}
.point-body h3{font-size:22px;font-weight:700;line-height:1.35;letter-spacing:-.01em}
.point-body p{margin-top:10px;font-size:16px;line-height:1.85;color:var(--ink-2);max-width:34em}
.point-arrow{margin-left:auto;align-self:center;color:var(--mute);font-size:20px;transition:transform 220ms var(--ease),color 220ms var(--ease)}
.point:hover .point-num{color:var(--lime);-webkit-text-stroke-color:var(--lime)}
.point:hover .point-arrow{transform:translateX(4px);color:var(--ink)}

/* gallery */
.gallery{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.g-item{
  position:relative;overflow:hidden;border-radius:var(--radius-img);background:var(--line);
  border:1px solid var(--line);transition:border-color 400ms ease-out,transform 220ms var(--ease),box-shadow 220ms var(--ease);
}
.g-item img{width:100%;height:100%;object-fit:cover;transition:transform 400ms ease-out}
.g-item.span-6{grid-column:span 6;aspect-ratio:16/10}
.g-item.span-3{grid-column:span 3;aspect-ratio:4/3}
.g-item:hover{border-color:var(--ink);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.g-item:hover img{transform:scale(1.03)}
.g-cap{
  position:absolute;left:0;right:0;bottom:0;padding:20px;
  background:linear-gradient(to top,rgba(17,18,20,.86),rgba(17,18,20,0));color:#fff;
}
.g-cap .tag{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.24);color:#fff;margin-bottom:10px}
.g-cap h3{font-size:16px;font-weight:700;line-height:1.4}
.g-item::after{
  content:"";position:absolute;top:14px;right:14px;width:10px;height:10px;background:var(--lime);border-radius:3px;
  opacity:0;transform:translateY(-4px);transition:opacity 220ms var(--ease),transform 220ms var(--ease);
}
.g-item:hover::after{opacity:1;transform:translateY(0)}

/* dark cta + form */
.cta-dark{background:var(--ink);color:#fff}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.cta-dark .h2{color:#fff}
.cta-dark .lead{color:rgba(255,255,255,.72)}
.cta-note{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.cta-note .tag{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.18);color:rgba(255,255,255,.86)}
.form{display:grid;gap:26px}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:12px;font-weight:600;letter-spacing:.08em;color:rgba(255,255,255,.6)}
.field input,.field select{
  background:transparent;border:0;border-bottom:1px solid rgba(255,255,255,.28);
  padding:10px 0;font-size:16px;color:#fff;border-radius:0;
  transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.field select option{color:var(--ink)}
.field input::placeholder{color:rgba(255,255,255,.35)}
.field input:focus,.field select:focus{outline:none;border-bottom:2px solid var(--lime)}
.field input:focus-visible,.field select:focus-visible{outline:2px solid var(--lime);outline-offset:4px}
.form .btn{justify-self:start;min-width:160px}
.form-msg{font-size:14px;color:var(--lime);min-height:22px}
.form-msg.is-error{color:#FFB199}

/* news */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--ink)}
.news-thumb{aspect-ratio:16/10;background:var(--line);overflow:hidden}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 400ms ease-out}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px}
.news-title{font-size:18px;font-weight:700;line-height:1.45;letter-spacing:-.01em;position:relative;padding-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-title::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--lime);transition:width 220ms var(--ease)}
.news-card:hover .news-title::after{width:36px}
.news-excerpt{font-size:15px;line-height:1.8;color:var(--ink-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:14px;border-top:1px solid var(--line)}
.news-date{font-size:12px;color:var(--mute);letter-spacing:.02em}
.news-more{font-size:13px;font-weight:600;color:var(--ink);display:inline-flex;align-items:center;gap:6px}
.news-more .arrow{transition:transform 180ms var(--ease)}
.news-card:hover .news-more .arrow{transform:translateX(4px)}
.empty-state{
  grid-column:1/-1;padding:64px 24px;text-align:center;border:1px dashed var(--line);border-radius:var(--radius-card);
  background:var(--paper-2);
}
.empty-state .icon{width:40px;height:40px;margin:0 auto 16px;border:2px solid var(--line);border-radius:10px}
.empty-state p{font-size:15px;color:var(--ink-2);margin-bottom:10px}
.empty-state a{font-size:14px;font-weight:600;color:var(--ink);border-bottom:2px solid var(--lime);padding-bottom:2px}

/* faq */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  display:flex;align-items:center;gap:20px;min-height:56px;padding:16px 0;
  cursor:pointer;list-style:none;font-size:17px;font-weight:600;letter-spacing:-.01em;
  transition:color 180ms var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--ink)}
.faq-idx{font-size:13px;font-weight:700;color:var(--mute);letter-spacing:.06em;min-width:28px}
.faq-q{flex:1}
.faq-icon{position:relative;width:20px;height:20px;flex-shrink:0}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--ink);transform:translate(-50%,-50%);
  transition:transform 200ms var(--ease),opacity 200ms var(--ease);
}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px}
.faq-item[open] .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-answer{
  background:var(--paper-2);border-left:3px solid var(--lime);padding:20px 24px;margin-bottom:16px;
  font-size:16px;line-height:1.85;color:var(--ink-2);border-radius:0 var(--radius-card) var(--radius-card) 0;
}

/* footer */
.site-footer{background:var(--ink);color:#fff;padding:72px 0 32px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.14)}
.site-footer h4{font-size:13px;font-weight:600;letter-spacing:.1em;color:rgba(255,255,255,.55);margin-bottom:18px}
.site-footer .brand-text{color:#fff}
.site-footer .brand-text small{color:rgba(255,255,255,.5)}
.site-footer p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);margin-top:16px;max-width:24em}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a,.footer-links span{font-size:14px;color:rgba(255,255,255,.72);transition:color 180ms var(--ease)}
.footer-links a:hover{color:var(--lime)}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;padding-top:24px;font-size:13px;color:rgba(255,255,255,.5)}
.footer-bottom a{color:rgba(255,255,255,.6)}
.footer-bottom a:hover{color:var(--lime)}

/* reveal */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 260ms ease-out,transform 260ms ease-out}
.reveal.is-visible{opacity:1;transform:none}
.reveal-stagger>*{opacity:0;transform:translateY(12px);transition:opacity 260ms ease-out,transform 260ms ease-out}
.reveal-stagger.is-visible>*{opacity:1;transform:none}
.reveal-stagger.is-visible>*:nth-child(1){transition-delay:0ms}
.reveal-stagger.is-visible>*:nth-child(2){transition-delay:60ms}
.reveal-stagger.is-visible>*:nth-child(3){transition-delay:120ms}
.reveal-stagger.is-visible>*:nth-child(4){transition-delay:180ms}
.reveal-stagger.is-visible>*:nth-child(5){transition-delay:240ms}
.reveal-stagger.is-visible>*:nth-child(6){transition-delay:300ms}

/* responsive */
@media (max-width:1199px){
  :root{--space-section:88px}
  .gallery{gap:20px}
}
@media (max-width:991px){
  :root{--space-section:80px}
  .main-nav{display:none}
  .menu-toggle{display:inline-flex}
  .nav-right .btn{display:none}
  .nav-wrap{height:64px}
  .hero-inner{padding-top:96px;padding-bottom:56px}
  .g-item.span-6{grid-column:span 12;aspect-ratio:16/10}
  .g-item.span-3{grid-column:span 6;aspect-ratio:4/3}
  .cta-grid{grid-template-columns:1fr;gap:40px}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .point{gap:28px}
}
@media (max-width:767px){
  :root{--space-section:64px}
  .container{padding:0 20px}
  .hero{display:block;background:var(--ink)}
  .hero-media{position:static;aspect-ratio:16/9;background:var(--line)}
  .hero-media img{position:static;height:100%}
  .hero-veil{display:none}
  .hero-inner{min-height:0;padding-top:32px;padding-bottom:40px}
  .hero-sub{font-size:16px}
  .hero-actions .btn{width:100%}
  .hero-stats{gap:24px 32px;margin-top:36px}
  .ticker-inner{gap:12px}
  .ticker-right{margin-left:0;width:100%;justify-content:space-between}
  .point{flex-direction:column;gap:12px;padding:28px 0}
  .point-num{font-size:40px;min-width:0}
  .point-arrow{display:none}
  .gallery{gap:16px}
  .g-item.span-3{grid-column:span 12;aspect-ratio:16/10}
  .news-grid{grid-template-columns:1fr}
  .faq-item summary{font-size:16px;gap:14px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .form .btn{width:100%}
}
@media (max-width:400px){
  .hero h1{font-size:clamp(28px,9vw,34px)}
  .ticker-clock b{font-size:14px}
  .brand-text{font-size:15px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal,.reveal-stagger>*{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --ink:#111214;
  --ink-2:#3A3E45;
  --paper:#F5F4F0;
  --paper-2:#FFFFFF;
  --line:#E2E0D9;
  --lime:#C6F24E;
  --lime-ink:#0C0D0E;
  --flame:#FF5A2B;
  --mute:#8A8C86;
  --radius:16px;
  --radius-img:20px;
  --shadow:0 1px 2px rgba(17,18,20,.04), 0 18px 40px -24px rgba(17,18,20,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.menu-open{overflow:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono);font-size:12.5px;letter-spacing:.02em}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(245,244,240,.92);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease-out;
}
.site-header.is-scrolled{box-shadow:0 1px 2px rgba(17,18,20,.05),0 14px 30px -24px rgba(17,18,20,.4)}
.header-inner{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  position:relative;width:16px;height:16px;border-radius:4px;
  background:var(--ink);flex-shrink:0;overflow:hidden;display:inline-block;
}
.brand-mark::after{
  content:"";position:absolute;right:0;bottom:0;width:10px;height:10px;background:var(--lime);
  clip-path:polygon(100% 0,100% 100%,0 100%);
}
.brand-text{font-size:16px;font-weight:800;letter-spacing:-.02em;color:var(--ink);white-space:nowrap}
.brand-text small{font-size:11px;font-weight:600;letter-spacing:.1em;color:var(--mute);margin-left:5px}

.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{
  position:relative;display:inline-block;padding:8px 12px;border-radius:999px;
  font-size:15px;font-weight:600;color:var(--ink-2);
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{background:var(--ink);color:#fff}
.nav-link.active::after{transform:scaleX(0)}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:14px}
.menu-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:999px;
  background:var(--paper-2);cursor:pointer;padding:0;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
  transition:border-color .18s var(--ease);
}
.menu-toggle span{display:block;width:16px;height:2px;background:var(--ink);border-radius:2px}
.menu-toggle:hover{border-color:var(--ink)}

/* ---------- mobile menu ---------- */
.mobile-menu{
  position:fixed;inset:0;z-index:90;background:var(--ink);color:#fff;
  display:flex;flex-direction:column;padding:20px;overflow-y:auto;
  animation:menuIn .22s var(--ease);
}
.mobile-menu[hidden]{display:none}
@keyframes menuIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
.mobile-menu-top{display:flex;align-items:center;justify-content:space-between;height:44px;margin-bottom:28px}
.mobile-menu .brand-text{color:#fff}
.mobile-menu .brand-text small{color:rgba(255,255,255,.5)}
.mobile-menu .brand-mark{background:#fff}
.menu-close{
  width:44px;height:44px;border-radius:999px;border:1px solid rgba(255,255,255,.24);
  background:transparent;color:#fff;font-size:22px;line-height:1;cursor:pointer;
  transition:background-color .18s var(--ease);
}
.menu-close:hover{background:rgba(255,255,255,.12)}
.mobile-nav{display:flex;flex-direction:column;gap:4px;flex:1}
.mobile-nav a{
  font-size:22px;font-weight:700;line-height:1.6;color:rgba(255,255,255,.85);
  padding:10px 0;border-bottom:1px solid rgba(255,255,255,.1);
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.mobile-nav a:hover{color:var(--lime);padding-left:6px}
.mobile-cta{margin-top:28px;width:100%}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;text-align:center;white-space:nowrap;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),filter .18s var(--ease);
}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-lime{background:var(--lime);color:var(--lime-ink);border-color:var(--lime)}
.btn-lime:hover{filter:brightness(.94);transform:translateY(-1px)}
.btn-lime:active{transform:translateY(0) scale(.99)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0) scale(.99)}
.btn-dark{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn-dark:hover{background:#1d1f23;transform:translateY(-1px)}
.btn:disabled,.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none;filter:none}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--paper);border:1px solid var(--line);color:var(--ink-2);
  font-size:12px;font-weight:600;letter-spacing:.04em;white-space:nowrap;
}
.tag-lime{background:var(--lime);border-color:var(--lime);color:var(--lime-ink)}

/* ---------- eyebrow / section head ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:12px;
  font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--mute);
}
.eyebrow-mark{width:8px;height:8px;background:var(--lime);display:inline-block;flex-shrink:0}
.section-title{
  font-size:clamp(24px,3vw,38px);font-weight:800;letter-spacing:-.02em;line-height:1.15;
  color:var(--ink);text-align:left;
}

/* ---------- breadcrumb ---------- */
.breadcrumb{
  display:flex;align-items:center;gap:8px;padding:24px 0 0;
  font-size:12px;color:var(--mute);white-space:nowrap;overflow:hidden;
}
.breadcrumb a{color:var(--mute);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--ink);text-decoration:underline;text-decoration-color:var(--lime);text-decoration-thickness:2px;text-underline-offset:3px}
.crumb-sep{color:var(--line);flex-shrink:0}
.crumb-current{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}

/* ---------- article layout ---------- */
.article-wrap{padding:28px 0 96px}
.post-layout{display:block;max-width:720px;margin:0 auto}
.post-main{min-width:0}
.toc{display:none}
.toc-title{font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--mute);margin-bottom:12px}
.toc-list{list-style:none;border-left:1px solid var(--line)}
.toc-list a{
  display:block;margin-left:-1px;padding:7px 0 7px 14px;border-left:2px solid transparent;
  font-size:13px;line-height:1.45;color:var(--mute);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.toc-list a:hover{color:var(--ink);border-left-color:var(--lime)}
@media (min-width:1200px){
  .post-layout{display:grid;grid-template-columns:196px minmax(0,1fr);gap:56px;max-width:1000px}
  .toc{display:block;position:sticky;top:100px;align-self:start}
}

/* ---------- article head ---------- */
.article-header{margin-bottom:28px}
.article-title{
  font-size:clamp(28px,4vw,44px);font-weight:800;letter-spacing:-.03em;line-height:1.18;
  color:var(--ink);margin-bottom:20px;word-break:break-word;overflow-wrap:anywhere;
}
.post-meta{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  padding-bottom:22px;border-bottom:1px solid var(--line);
}
.meta-item{font-size:13px;color:var(--mute)}
.share-group{display:flex;gap:8px;margin-left:auto}
.share-btn{
  width:36px;height:36px;border-radius:50%;border:1px solid var(--line);background:var(--paper-2);
  display:inline-flex;align-items:center;justify-content:center;color:var(--ink-2);
  cursor:pointer;padding:0;transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.share-btn:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
.share-btn svg{width:15px;height:15px;display:block}

/* ---------- article body ---------- */
.article-body{font-size:17px;line-height:1.9;color:var(--ink-2);padding-top:32px}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  position:relative;margin:40px 0 16px;padding-left:16px;
  font-size:24px;font-weight:800;letter-spacing:-.02em;line-height:1.35;color:var(--ink);
  scroll-margin-top:96px;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.34em;width:3px;height:1em;background:var(--lime)}
.article-body h3{margin:32px 0 12px;font-size:20px;font-weight:700;line-height:1.4;color:var(--ink)}
.article-body h4{margin:24px 0 10px;font-size:17px;font-weight:700;color:var(--ink)}
.article-body blockquote{
  margin:24px 0;padding:20px;border-left:3px solid var(--ink);border-radius:0 var(--radius) var(--radius) 0;
  background:var(--paper-2);color:var(--ink-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:0;list-style:none}
.article-body ol{counter-reset:li}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:8px}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;background:var(--lime);
}
.article-body ol li{position:relative;padding-left:28px;margin-bottom:8px;counter-increment:li}
.article-body ol li::before{
  content:counter(li,decimal-leading-zero);position:absolute;left:0;top:0;
  font-family:var(--mono);font-size:13px;font-weight:600;color:var(--mute);
}
.article-body img{
  width:100%;height:auto;border-radius:var(--radius);margin:24px 0 8px;background:var(--line);
}
.article-body a{
  color:var(--ink);font-weight:600;
  text-decoration:underline;text-decoration-color:var(--lime);text-decoration-thickness:2px;text-underline-offset:3px;
}
.article-body a:hover{text-decoration-color:var(--ink)}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.article-body thead th{
  border-top:2px solid var(--ink);border-bottom:1px solid var(--ink);
  padding:12px 14px;text-align:left;font-weight:700;color:var(--ink);background:transparent;
}
.article-body td{border-bottom:1px solid var(--line);padding:12px 14px;color:var(--ink-2)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:40px 0}
.article-body code{
  font-family:var(--mono);font-size:.88em;background:var(--paper-2);
  border:1px solid var(--line);border-radius:6px;padding:2px 6px;color:var(--ink);
}
.article-body figure{margin:24px 0}
.article-body figcaption{
  margin-top:10px;text-align:center;font-size:13px;color:var(--mute);
}

/* ---------- empty state ---------- */
.empty-state{
  border:1px dashed var(--line);border-radius:var(--radius);background:var(--paper-2);
  padding:64px 24px;text-align:center;
}
.empty-icon{
  width:40px;height:40px;margin:0 auto 16px;border:1.5px solid var(--line);border-radius:12px;
  display:flex;align-items:center;justify-content:center;color:var(--mute);
}
.empty-state p{color:var(--ink-2);margin-bottom:18px}

/* ---------- article footer / related ---------- */
.article-foot{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  margin-top:48px;padding-top:24px;border-top:1px solid var(--line);
}
.foot-label{font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--mute)}
.foot-back{margin-left:auto}
.related{margin-top:56px}
.rel-list{display:flex;flex-direction:column;gap:12px;margin-top:20px}
.rel-item{
  display:flex;align-items:center;gap:16px;padding:12px;
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.rel-item:hover{border-color:var(--ink);transform:translateY(-2px);box-shadow:var(--shadow)}
.rel-thumb{width:88px;height:64px;border-radius:12px;object-fit:cover;flex-shrink:0;background:var(--line)}
.rel-body{min-width:0}
.rel-title{
  font-size:15px;font-weight:700;line-height:1.5;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rel-item:hover .rel-title{text-decoration:underline;text-decoration-color:var(--lime);text-decoration-thickness:2px;text-underline-offset:3px}
.rel-meta{margin-top:5px;font-size:12px;color:var(--mute)}

/* ---------- CTA band ---------- */
.cta-band{background:var(--ink);color:#fff;padding:72px 0}
.cta-inner{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:start}
.cta-band .eyebrow{color:rgba(255,255,255,.55)}
.cta-band .section-title{color:#fff}
.cta-lead{margin-top:16px;font-size:16px;line-height:1.85;color:rgba(255,255,255,.72);max-width:34ch}
.cta-form{display:grid;grid-template-columns:1fr 1fr;gap:22px 24px}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:12px;font-weight:600;letter-spacing:.08em;color:rgba(255,255,255,.6)}
.field input,.field select{
  height:40px;padding:0 2px;background:transparent;color:#fff;
  border:0;border-bottom:1px solid rgba(255,255,255,.24);border-radius:0;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field input::placeholder{color:rgba(255,255,255,.34)}
.field input:focus,.field select:focus{outline:none;border-bottom-color:var(--lime);box-shadow:0 1px 0 0 var(--lime)}
.field select option{color:var(--ink)}
.cta-form .btn{grid-column:1 / -1;justify-self:start}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.site-footer .brand-text{color:#fff}
.site-footer .brand-text small{color:rgba(255,255,255,.5)}
.site-footer .brand-mark{background:#fff}
.site-footer h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.02em}
.site-footer p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:32ch}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:14px}
.footer-links a{color:rgba(255,255,255,.72);transition:color .18s var(--ease)}
.footer-links a:hover{color:var(--lime)}
.footer-links span{color:rgba(255,255,255,.66)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;
  border-top:1px solid rgba(255,255,255,.14);padding:20px 0 28px;
  font-size:12.5px;color:rgba(255,255,255,.5);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px)}
.reveal.is-in{opacity:1;transform:none;transition:opacity .5s ease-out,transform .5s ease-out}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .main-nav{gap:0}
  .nav-link{padding:8px 9px;font-size:14px}
}
@media (max-width:991px){
  .main-nav{display:none}
  .menu-toggle{display:flex}
  .header-actions{margin-left:auto}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-inner{grid-template-columns:minmax(0,1fr);gap:32px}
  .article-wrap{padding:20px 0 80px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .header-inner{height:60px}
  .brand-text{font-size:15px}
  .brand-text small{display:none}
  .header-actions .btn-lime{display:none}
  .cta-band{padding:64px 0}
  .cta-form{grid-template-columns:minmax(0,1fr)}
  .cta-form .btn{grid-column:auto;width:100%}
  .post-meta{gap:10px}
  .share-group{margin-left:0}
  .article-body{font-size:16px;line-height:1.88;padding-top:26px}
  .article-body h2{font-size:21px;margin-top:34px}
  .article-body h3{font-size:18px}
  .rel-item{gap:12px;padding:10px}
  .rel-thumb{width:76px;height:58px}
  .rel-title{font-size:14px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:400px){
  .article-title{font-size:26px}
  .article-body{font-size:15.5px;line-height:1.85}
  .article-body table{font-size:13.5px}
  .article-body thead th,.article-body td{padding:10px 8px}
  .tag{font-size:11.5px;padding:0 10px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --ink:#111214;
  --ink-2:#3A3E45;
  --paper:#F5F4F0;
  --paper-2:#FFFFFF;
  --paper-3:#EFEDE6;
  --line:#E2E0D9;
  --lime:#C6F24E;
  --lime-ink:#0C0D0E;
  --flame:#FF5A2B;
  --mute:#8A8C86;
  --radius-card:16px;
  --radius-img:20px;
  --radius-pill:999px;
  --shadow:0 1px 2px rgba(17,18,20,.04), 0 18px 40px -24px rgba(17,18,20,.22);
  --shadow-deep:0 2px 4px rgba(17,18,20,.06), 0 28px 54px -26px rgba(17,18,20,.32);
  --container:1200px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:"PingFang SC","Microsoft YaHei","Source Han Sans SC",Inter,system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  color:var(--ink-2);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:800}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:6px}
::selection{background:var(--lime);color:var(--lime-ink)}

/* ---------- 容器 ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(245,244,240,.94);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease-out;
}
.site-header.is-scrolled{box-shadow:0 12px 28px -22px rgba(17,18,20,.55)}
.header-inner{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  position:relative;display:block;width:16px;height:16px;
  border-radius:4px;background:var(--ink);overflow:hidden
}
.brand-mark::after{
  content:"";position:absolute;right:-4px;bottom:-4px;width:14px;height:14px;
  background:var(--lime);transform:rotate(-38deg)
}
.brand-text{
  display:inline-flex;align-items:baseline;gap:6px;
  font-size:17px;font-weight:800;letter-spacing:-.02em;color:var(--ink);white-space:nowrap
}
.brand-text small{
  font-size:10px;font-weight:600;letter-spacing:.14em;color:var(--mute);
  border:1px solid var(--line);border-radius:var(--radius-pill);padding:1px 6px
}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{
  position:relative;padding:8px 13px;font-size:15px;font-weight:600;color:var(--ink-2);
  border-radius:var(--radius-pill);
  transition:color .18s var(--ease),background .18s var(--ease)
}
.nav-link::after{
  content:"";position:absolute;left:13px;right:13px;bottom:3px;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease)
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{background:var(--ink);color:#fff}
.nav-link.active::after{display:none}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:10px}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-pill);
  align-items:center;justify-content:center;background:var(--paper-2);
  transition:border-color .18s var(--ease),background .18s var(--ease)
}
.nav-toggle:hover{border-color:var(--ink)}
.nav-toggle span{position:relative;display:block;width:18px;height:2px;background:var(--ink)}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);
  transition:transform .2s var(--ease)
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:transform .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease)
}
.btn-primary{background:var(--lime);color:var(--lime-ink)}
.btn-primary:hover{background:#B9E642;transform:translateY(-1px)}
.btn-primary:active{transform:none;background:#AEDA38}
.btn-ghost{border:1px solid var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-1px)}
.btn-ghost:active{transform:none}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#26292E;transform:translateY(-1px)}
.btn-dark:active{transform:none}
.btn-on-dark{border:1px solid rgba(255,255,255,.42);color:#fff}
.btn-on-dark:hover{background:#fff;color:var(--ink);border-color:#fff}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}

/* ---------- 通用标签 ---------- */
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  font-size:12px;font-weight:600;letter-spacing:.04em;color:var(--ink-2);
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-pill)
}
.tag-accent{background:var(--lime);border-color:var(--lime);color:var(--lime-ink)}
.tag-flame{background:rgba(255,90,43,.1);border-color:rgba(255,90,43,.35);color:#C33C12}

/* ---------- 版块标题 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--mute)
}
.eyebrow i{display:block;width:8px;height:8px;border-radius:2px;background:var(--lime)}
.eyebrow-light{color:rgba(255,255,255,.74)}
.section{padding:104px 0}
.section-tight{padding:72px 0}
.section-alt{background:var(--paper-3)}
.section-head{margin-bottom:40px}
.section-head h2{
  margin-top:14px;
  font-size:clamp(24px,3vw,38px);letter-spacing:-.02em;line-height:1.15
}
.section-sub{margin-top:16px;max-width:660px;font-size:16px;line-height:1.85;color:var(--ink-2)}

/* ---------- 分类页头图 ---------- */
.page-hero{position:relative;height:260px;overflow:hidden;background:var(--ink)}
.page-hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.92}
.page-hero-mask{
  position:absolute;inset:0;
  background:linear-gradient(to top,rgba(17,18,20,.9) 8%,rgba(17,18,20,.66) 55%,rgba(17,18,20,.5) 100%)
}
.page-hero-inner{
  position:relative;height:100%;display:flex;flex-direction:column;justify-content:flex-end;
  padding-bottom:26px;color:#fff
}
.page-hero h1{
  margin-top:12px;color:#fff;
  font-size:clamp(30px,4.4vw,50px);font-weight:800;letter-spacing:-.03em;line-height:1.08;
  word-break:break-word
}
.page-hero h1 .h1-note{
  display:inline-block;margin-left:10px;font-size:clamp(15px,1.8vw,20px);
  font-weight:600;letter-spacing:0;color:rgba(255,255,255,.78);vertical-align:middle
}
.page-hero-sub{margin-top:10px;font-size:16px;color:rgba(255,255,255,.86)}

/* ---------- 导读区 ---------- */
.intro-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:56px;align-items:start}
.intro-lead{font-size:17px;line-height:1.9;color:var(--ink-2);max-width:42em}
.intro-facts{display:grid;gap:18px;border-left:1px solid var(--line);padding-left:28px}
.intro-facts li{display:flex;flex-direction:column;gap:4px}
.fact-num{font-family:var(--font-mono);font-size:20px;font-weight:600;color:var(--ink);letter-spacing:-.01em}
.fact-label{font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--mute)}

/* ---------- 侧栏胶囊 + 卡片网格 ---------- */
.tabs-layout{display:grid;grid-template-columns:216px minmax(0,1fr);gap:40px;align-items:start}
.tab-rail{position:sticky;top:96px;display:flex;flex-direction:column;gap:8px}
.tab-pill{
  display:flex;align-items:center;gap:10px;padding:11px 18px;
  font-size:14px;font-weight:600;color:var(--ink-2);
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-pill);
  transition:transform .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease),color .18s var(--ease)
}
.tab-pill::before{
  content:"";width:6px;height:6px;border-radius:2px;background:var(--line);
  transition:background .18s var(--ease)
}
.tab-pill:hover{border-color:var(--ink);color:var(--ink);transform:translateX(2px)}
.tab-pill.is-active{background:var(--lime);border-color:var(--lime);color:var(--lime-ink)}
.tab-pill.is-active::before{background:var(--lime-ink)}

.card-grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.dl-card{
  display:flex;gap:18px;padding:26px;
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease)
}
.dl-card:hover{transform:translateY(-2px);border-color:var(--ink);box-shadow:var(--shadow-deep)}
.card-icon{
  flex:0 0 52px;width:52px;height:52px;border-radius:14px;
  display:grid;place-items:center;color:var(--ink);
  background:var(--paper);border:1px solid var(--line);
  transition:background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease)
}
.dl-card:hover .card-icon{background:var(--lime);border-color:var(--lime);color:var(--lime-ink)}
.card-body{min-width:0;flex:1 1 auto}
.card-title-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.card-title-row h3{font-size:20px;font-weight:700;line-height:1.35}
.card-body p{margin-top:8px;font-size:15px;line-height:1.8;color:var(--ink-2)}
.card-arrow{
  align-self:center;flex:0 0 auto;color:var(--mute);
  transition:transform .22s var(--ease),color .22s var(--ease)
}
.dl-card:hover .card-arrow{transform:translateX(4px);color:var(--ink)}
.card-link-note{
  display:inline-flex;align-items:center;gap:6px;margin-top:14px;
  font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--mute)
}
.dl-card:hover .card-link-note{color:var(--ink)}

/* ---------- 表格资料 ---------- */
.table-wrap{
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  background:var(--paper-2);box-shadow:var(--shadow)
}
.spec-table{font-size:15px;min-width:640px}
.spec-table thead th{
  background:var(--ink);color:#fff;text-align:left;font-weight:600;font-size:13px;
  letter-spacing:.06em;padding:14px 20px;white-space:nowrap
}
.spec-table tbody td{padding:16px 20px;border-top:1px solid var(--line);color:var(--ink-2);vertical-align:top}
.spec-table tbody tr:hover{background:var(--paper)}
.spec-table td:first-child{color:var(--ink);font-weight:600}
.mono{font-family:var(--font-mono);font-size:14px;color:var(--ink)}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.check-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:28px}
.check-item{display:flex;gap:14px;align-items:flex-start}
.check-item .idx{
  font-family:var(--font-mono);font-size:13px;font-weight:600;color:var(--ink);
  border:1px solid var(--line);border-radius:var(--radius-pill);padding:2px 10px;background:var(--paper-2)
}
.check-item p{font-size:15px;line-height:1.8}

/* ---------- 安装支持 ---------- */
.support-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.support-figure{border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line);background:var(--line)}
.support-figure img{width:100%;height:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s ease-out}
.support-figure:hover img{transform:scale(1.03)}
.step-list{margin-top:26px;display:grid;gap:0}
.step-row{display:flex;gap:18px;padding:22px 0;border-top:1px solid var(--line)}
.step-row:last-child{border-bottom:1px solid var(--line)}
.step-row .step-no{
  font-family:var(--font-mono);font-size:26px;font-weight:700;color:var(--line);
  line-height:1.2;flex:0 0 44px;transition:color .22s var(--ease)
}
.step-row:hover .step-no{color:var(--lime)}
.step-row h3{font-size:19px;font-weight:700}
.step-row p{margin-top:6px;font-size:15px;line-height:1.8}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);margin-top:8px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;
  min-height:56px;padding:16px 0;text-align:left;
  font-size:17px;font-weight:700;color:var(--ink)
}
.faq-idx{font-family:var(--font-mono);font-size:13px;font-weight:600;color:var(--mute);flex:0 0 auto}
.faq-icon{
  position:relative;margin-left:auto;flex:0 0 24px;width:24px;height:24px;border-radius:50%;
  border:1px solid var(--line);background:var(--paper-2);
  transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease)
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;background:var(--ink);
  transform:translate(-50%,-50%)
}
.faq-icon::before{width:10px;height:2px}
.faq-icon::after{width:2px;height:10px;transition:opacity .2s var(--ease)}
.faq-item.is-open .faq-icon{transform:rotate(180deg);background:var(--lime);border-color:var(--lime)}
.faq-item.is-open .faq-icon::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease-out}
.faq-a-inner{
  background:var(--paper-2);border-left:3px solid var(--lime);
  padding:18px 22px;margin:0 0 18px 0;border-radius:0 12px 12px 0;
  font-size:16px;line-height:1.85;color:var(--ink-2)
}
.faq-q:hover .faq-icon{transform:rotate(90deg)}
.faq-item.is-open .faq-q:hover .faq-icon{transform:rotate(180deg)}

/* ---------- 深色 CTA ---------- */
.cta-band{
  background:var(--ink);color:rgba(255,255,255,.82);
  border-radius:24px;padding:56px;
  display:flex;align-items:center;justify-content:space-between;gap:40px
}
.cta-band h2{color:#fff;font-size:clamp(24px,3vw,34px);letter-spacing:-.02em;line-height:1.2}
.cta-band p{margin-top:14px;font-size:16px;max-width:34em;color:rgba(255,255,255,.76)}
.cta-actions{display:flex;gap:14px;flex:0 0 auto;flex-wrap:wrap}
.cta-meta{
  display:flex;gap:26px;flex-wrap:wrap;margin-top:26px;
  font-family:var(--font-mono);font-size:13px;color:rgba(255,255,255,.6)
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.7);margin-top:0}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;
  padding:72px 0 40px;border-top:1px solid rgba(255,255,255,.14)
}
.footer-grid h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;letter-spacing:.02em}
.footer-grid p{font-size:14px;line-height:1.85;margin-top:16px;color:rgba(255,255,255,.68);max-width:30em}
.footer-grid .brand-text{color:#fff}
.footer-grid .brand-text small{color:rgba(255,255,255,.6);border-color:rgba(255,255,255,.24)}
.footer-links{display:grid;gap:10px;font-size:14px}
.footer-links a{color:rgba(255,255,255,.72);transition:color .18s var(--ease)}
.footer-links a:hover{color:var(--lime)}
.footer-links span{color:rgba(255,255,255,.56)}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 0 34px;border-top:1px solid rgba(255,255,255,.14);
  font-family:var(--font-mono);font-size:12px;color:rgba(255,255,255,.52)
}

/* ---------- 移动端菜单 ---------- */
.mobile-menu{
  position:fixed;inset:0;z-index:80;background:var(--ink);color:#fff;
  display:flex;flex-direction:column;padding:16px 0 32px;
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease)
}
.mobile-menu.is-open{opacity:1;visibility:visible;transform:none}
.mobile-head{display:flex;align-items:center;justify-content:space-between;height:60px}
.mobile-close{
  width:44px;height:44px;border-radius:var(--radius-pill);border:1px solid rgba(255,255,255,.24);
  display:grid;place-items:center;color:#fff
}
.mobile-nav{display:flex;flex-direction:column;gap:4px;margin-top:24px}
.mobile-nav a{
  font-size:23px;font-weight:700;line-height:1.6;color:rgba(255,255,255,.86);
  padding:10px 0;border-bottom:1px solid rgba(255,255,255,.1);
  transition:color .18s var(--ease),padding-left .18s var(--ease)
}
.mobile-nav a:hover,.mobile-nav a.active{color:var(--lime);padding-left:6px}
.mobile-foot{margin-top:auto;display:grid;gap:14px}
.mobile-foot .btn{width:100%}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease-out,transform .5s ease-out}
.reveal.is-in{opacity:1;transform:none}
.reveal-d1{transition-delay:.06s}
.reveal-d2{transition-delay:.12s}
.reveal-d3{transition-delay:.18s}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .main-nav{gap:0}
  .nav-link{padding:8px 10px;font-size:14px}
  .nav-link::after{left:10px;right:10px}
  .brand-text{font-size:16px}
  .section{padding:88px 0}
}
@media (max-width:991px){
  .main-nav,.header-actions .nav-cta{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{height:64px}
  .intro-grid{grid-template-columns:1fr;gap:32px}
  .intro-facts{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:24px;grid-template-columns:repeat(3,1fr)}
  .tabs-layout{grid-template-columns:1fr;gap:28px}
  .tab-rail{
    position:static;flex-direction:row;overflow-x:auto;gap:10px;
    padding-bottom:6px;-webkit-overflow-scrolling:touch
  }
  .tab-pill{white-space:nowrap}
  .card-grid-2{grid-template-columns:1fr}
  .check-list{grid-template-columns:1fr;gap:16px}
  .support-grid{grid-template-columns:1fr;gap:32px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:40px 32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding-top:56px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .section{padding:64px 0}
  .section-tight{padding:52px 0}
  .page-hero{height:200px}
  .page-hero h1 .h1-note{display:block;margin-left:0;margin-top:6px}
  .intro-facts{grid-template-columns:1fr;gap:14px}
  .dl-card{padding:22px;gap:14px}
  .card-icon{flex-basis:44px;width:44px;height:44px;border-radius:12px}
  .cta-band{padding:32px 22px;border-radius:20px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .step-row .step-no{flex-basis:36px;font-size:22px}
}
@media (max-width:400px){
  .page-hero h1{font-size:28px}
  .brand-text{font-size:15px}
  .brand-text small{display:none}
  .btn{padding:0 18px;font-size:14px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category2 */
:root{
  --ink:#111214;
  --ink-2:#3A3E45;
  --paper:#F5F4F0;
  --paper-2:#FFFFFF;
  --line:#E2E0D9;
  --lime:#C6F24E;
  --lime-ink:#0C0D0E;
  --flame:#FF5A2B;
  --mute:#8A8C86;
  --radius-card:16px;
  --radius-img:20px;
  --radius-pill:999px;
  --shadow:0 1px 2px rgba(17,18,20,.04), 0 18px 40px -24px rgba(17,18,20,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-2);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
body.is-locked{overflow:hidden;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:800;letter-spacing:-.02em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ============ 吸顶导航 ============ */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(245,244,240,.92);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease-out;
}
.site-header.is-scrolled{box-shadow:0 12px 30px -24px rgba(17,18,20,.55);}
.header-inner{display:flex;align-items:center;gap:28px;height:68px;}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.02em;color:var(--ink);white-space:nowrap;}
.brand-mark{
  width:16px;height:16px;border-radius:4px;background:var(--ink);
  position:relative;overflow:hidden;flex:none;
}
.brand-mark::after{
  content:"";position:absolute;right:-5px;bottom:-5px;width:13px;height:13px;
  background:var(--lime);transform:rotate(45deg);
}
.brand-text{font-size:17px;display:inline-flex;align-items:baseline;gap:6px;}
.brand-text small{font-size:11px;font-weight:600;letter-spacing:.1em;color:var(--mute);}
.main-nav{display:flex;align-items:center;gap:22px;margin-left:auto;}
.nav-link{
  position:relative;font-size:15px;font-weight:600;color:var(--ink-2);
  padding:7px 2px;transition:color .18s ease-out;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform .18s ease-out;
}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{
  background:var(--ink);color:#fff;padding:7px 16px;border-radius:var(--radius-pill);
}
.nav-link.active::after{display:none;}
.header-cta{margin-left:8px;}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);
  border-radius:var(--radius-pill);background:var(--paper-2);cursor:pointer;
  align-items:center;justify-content:center;transition:border-color .18s ease-out;
}
.nav-toggle:hover{border-color:var(--ink);}
.bars,.bars::before,.bars::after{
  display:block;width:16px;height:2px;background:var(--ink);border-radius:2px;
  transition:transform .2s ease-out;
}
.bars{position:relative;}
.bars::before{content:"";position:absolute;top:-5px;}
.bars::after{content:"";position:absolute;top:5px;}

/* 移动端覆盖层 */
.mobile-menu{
  position:fixed;inset:0;z-index:120;background:var(--ink);color:#fff;
  display:flex;flex-direction:column;padding:20px 20px 32px;
  transform:translateY(-8px);opacity:0;visibility:hidden;
  transition:opacity .22s ease-out,transform .22s ease-out,visibility .22s;
}
.mobile-menu.is-open{transform:none;opacity:1;visibility:visible;}
.mobile-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid rgba(255,255,255,.14);}
.mobile-menu .brand{color:#fff;}
.mobile-menu .brand-text small{color:rgba(255,255,255,.55);}
.mobile-close{
  width:42px;height:42px;border-radius:var(--radius-pill);background:transparent;
  border:1px solid rgba(255,255,255,.32);color:#fff;font-size:20px;line-height:1;cursor:pointer;
  display:flex;align-items:center;justify-content:center;transition:background .18s ease-out;
}
.mobile-close:hover{background:rgba(255,255,255,.12);}
.mobile-nav{display:flex;flex-direction:column;gap:4px;margin:28px 0 24px;}
.mobile-nav a{
  font-size:22px;line-height:1.6;font-weight:700;color:#fff;padding:8px 0;
  border-bottom:1px solid rgba(255,255,255,.08);transition:color .18s ease-out;
}
.mobile-nav a:hover,.mobile-nav a.active{color:var(--lime);}
.mobile-menu .btn{margin-top:auto;width:100%;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),
             transform .18s var(--ease),border-color .18s var(--ease),filter .18s var(--ease);
}
.btn-primary{background:var(--lime);color:var(--lime-ink);}
.btn-primary:hover{filter:brightness(.94);transform:translateY(-1px);}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:#fff;}
.btn-dark{background:var(--ink);color:#fff;}
.btn-dark:hover{background:#000;transform:translateY(-1px);}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.5);color:#fff;}
.btn-outline-light:hover{background:#fff;color:var(--ink);border-color:#fff;}
.btn:active{transform:scale(.99);}
.btn:disabled,.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;}

/* ============ 窄版头图 ============ */
.page-hero{
  position:relative;min-height:260px;display:flex;align-items:flex-end;
  background-image:linear-gradient(to top,rgba(17,18,20,.82) 0%,rgba(17,18,20,.5) 45%,rgba(17,18,20,.28) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.page-hero .container{padding-bottom:40px;padding-top:80px;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;
  letter-spacing:.08em;color:rgba(255,255,255,.72);margin-bottom:14px;
}
.hero-eyebrow .dot{width:8px;height:8px;background:var(--lime);border-radius:2px;}
.page-hero h1{
  color:#fff;font-size:clamp(32px,4.6vw,56px);line-height:1.05;letter-spacing:-.03em;
  word-break:break-word;
}
.page-hero .hero-sub{color:rgba(255,255,255,.86);font-size:16px;margin-top:14px;max-width:520px;}

/* ============ 通用板块 ============ */
.section{padding:96px 0;}
.section.tight{padding:72px 0;}
.section.alt{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;
  letter-spacing:.08em;color:var(--mute);margin-bottom:14px;
}
.eyebrow .dot{width:8px;height:8px;background:var(--lime);border-radius:2px;}
.eyebrow.light{color:rgba(255,255,255,.66);}
h2{font-size:clamp(24px,3vw,38px);line-height:1.15;letter-spacing:-.02em;}
.section-head{max-width:720px;}
.section-lede{margin-top:16px;font-size:16px;line-height:1.85;color:var(--ink-2);max-width:42em;}

/* ============ 导读区 ============ */
.intro{padding:72px 0 24px;}
.intro-inner{
  display:grid;grid-template-columns:1.35fr .65fr;gap:48px;align-items:start;
}
.intro-text p{font-size:17px;line-height:1.9;color:var(--ink-2);}
.intro-text p + p{margin-top:16px;}
.intro-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.chip{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  font-size:12px;font-weight:600;letter-spacing:.04em;
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-pill);color:var(--ink-2);
}
.chip-lime{background:var(--lime);border-color:var(--lime);color:var(--lime-ink);}
.chip-flame{background:#FFEDE6;border-color:#FFD3C4;color:#B33611;}
.chip-ink{background:var(--ink);border-color:var(--ink);color:#fff;}
.intro-card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow);
}
.intro-card h3{font-size:18px;margin-bottom:14px;}
.intro-card ul{display:flex;flex-direction:column;gap:12px;}
.intro-card li{
  display:flex;gap:10px;font-size:14px;line-height:1.7;color:var(--ink-2);
}
.intro-card li::before{
  content:"";flex:none;width:6px;height:6px;background:var(--lime);margin-top:9px;border-radius:1px;
}
.intro-card .card-img{margin-top:20px;border-radius:var(--radius-img);height:150px;width:100%;object-fit:cover;background:var(--line);}

/* ============ 时间轴 ============ */
.slogan{
  font-size:clamp(26px,3.4vw,44px);font-weight:800;letter-spacing:-.03em;line-height:1.18;
  color:var(--ink);max-width:16em;
}
.slogan em{font-style:normal;background:var(--lime);border-radius:6px;padding:0 8px;}
.timeline{position:relative;margin-top:56px;}
.timeline::before{
  content:"";position:absolute;left:50%;top:6px;bottom:6px;width:1px;background:var(--line);
  transform:translateX(-.5px);
}
.tl-item{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:56px;padding-bottom:56px;}
.tl-item:last-child{padding-bottom:0;}
.tl-node{
  position:absolute;left:50%;top:26px;width:14px;height:14px;border-radius:50%;
  background:var(--lime);border:3px solid var(--paper);
  box-shadow:0 0 0 1px var(--ink);transform:translateX(-50%);z-index:2;
}
.tl-card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow);
  transition:transform .25s ease-out,border-color .25s ease-out,box-shadow .25s ease-out;
}
.tl-card:hover{transform:translateY(-2px);border-color:var(--ink);}
.tl-item:nth-child(odd) .tl-card{grid-column:1;}
.tl-item:nth-child(even) .tl-card{grid-column:2;}
.tl-head{display:flex;align-items:center;gap:12px;margin-bottom:12px;flex-wrap:wrap;}
.ver{font-family:var(--font-mono);font-size:15px;font-weight:700;color:var(--ink);letter-spacing:-.01em;}
.tl-card h3{font-size:19px;line-height:1.35;margin-bottom:10px;}
.tl-card p{font-size:15px;line-height:1.85;color:var(--ink-2);}
.tl-meta{
  display:flex;flex-wrap:wrap;gap:16px;margin-top:16px;padding-top:14px;
  border-top:1px solid var(--line);font-family:var(--font-mono);font-size:12px;color:var(--mute);
}
.tl-card img{
  margin-top:18px;width:100%;height:150px;object-fit:cover;
  border-radius:var(--radius-img);background:var(--line);
}

/* ============ 数据块 ============ */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:40px;}
.stat{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;transition:transform .25s ease-out,border-color .25s ease-out;
}
.stat:hover{transform:translateY(-2px);border-color:var(--ink);}
.stat .num{font-family:var(--font-mono);font-size:26px;font-weight:700;color:var(--ink);letter-spacing:-.02em;}
.stat .label{font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--mute);margin-top:8px;}
.stat p{font-size:14px;line-height:1.7;color:var(--ink-2);margin-top:10px;}

/* ============ FAQ ============ */
.faq{margin-top:36px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;gap:18px;min-height:56px;padding:14px 4px;
  background:transparent;border:0;cursor:pointer;text-align:left;
  transition:background-color .2s ease-out;
}
.faq-q:hover{background:rgba(226,224,217,.32);}
.faq-idx{font-family:var(--font-mono);font-size:12px;color:var(--mute);flex:none;}
.faq-text{font-size:16px;font-weight:700;color:var(--ink);flex:1;}
.faq-icon{width:16px;height:16px;position:relative;flex:none;}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--ink);border-radius:2px;transition:transform .2s ease-out;}
.faq-icon::before{left:0;right:0;top:7px;height:2px;}
.faq-icon::after{top:0;bottom:0;left:7px;width:2px;}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);}
.faq-a{
  max-height:0;overflow:hidden;border-left:3px solid transparent;
  background:var(--paper-2);transition:max-height .24s ease-out,border-color .24s ease-out;
}
.faq-item.is-open .faq-a{max-height:340px;border-left-color:var(--lime);}
.faq-a p{padding:6px 20px 20px;font-size:15px;line-height:1.85;color:var(--ink-2);}

/* ============ 深色 CTA ============ */
.cta-dark{background:var(--ink);color:#fff;padding:80px 0;}
.cta-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:center;}
.cta-dark h2{color:#fff;}
.cta-sub{margin-top:16px;font-size:16px;line-height:1.85;color:rgba(255,255,255,.75);max-width:34em;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:flex-end;}
.cta-note{margin-top:32px;font-size:13px;color:rgba(255,255,255,.5);font-family:var(--font-mono);}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 28px;border-top:1px solid rgba(255,255,255,.14);}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
.site-footer .brand{color:#fff;}
.site-footer .brand-text small{color:rgba(255,255,255,.5);}
.site-footer p{font-size:14px;line-height:1.85;margin-top:16px;color:rgba(255,255,255,.66);max-width:32em;}
.site-footer h4{color:#fff;font-size:14px;letter-spacing:.06em;margin-bottom:16px;font-weight:700;}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:14px;}
.footer-links a{color:rgba(255,255,255,.72);transition:color .18s ease-out;}
.footer-links a:hover{color:var(--lime);}
.footer-links span{color:rgba(255,255,255,.55);}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:48px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ============ 动效 ============ */
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .26s ease-out,transform .26s ease-out;}
.js .reveal.is-in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .header-inner{gap:20px;}
  .main-nav{gap:16px;}
  .nav-link{font-size:14px;}
}
@media (max-width:991px){
  .main-nav,.header-cta{display:none;}
  .nav-toggle{display:inline-flex;}
  .section{padding:80px 0;}
  .intro-inner{grid-template-columns:1fr;gap:32px;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .cta-inner{grid-template-columns:1fr;gap:32px;}
  .cta-actions{justify-content:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .header-inner{height:60px;}
  .brand-text{font-size:15px;}
  .section{padding:64px 0;}
  .page-hero{min-height:200px;}
  .page-hero .container{padding-top:64px;padding-bottom:28px;}
  .intro{padding:56px 0 16px;}
  .timeline::before{left:7px;transform:none;}
  .tl-item{grid-template-columns:1fr;gap:0;padding-bottom:40px;padding-left:32px;}
  .tl-item:nth-child(odd) .tl-card,
  .tl-item:nth-child(even) .tl-card{grid-column:1;}
  .tl-node{left:7px;top:24px;transform:translateX(-50%);}
  .stat-grid{grid-template-columns:1fr;gap:16px;}
  .btn{height:44px;}
  .cta-dark{padding:64px 0;}
  .cta-actions .btn{flex:1 1 auto;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:400px){
  .brand-text{font-size:14px;}
  .brand-text small{display:none;}
  .page-hero h1{font-size:30px;}
  .tl-card{padding:20px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  html{scroll-behavior:auto;}
  .js .reveal{opacity:1;transform:none;}
}

/* roulang page: category3 */
:root{
  --ink:#111214;
  --ink-2:#3A3E45;
  --paper:#F5F4F0;
  --paper-2:#FFFFFF;
  --line:#E2E0D9;
  --lime:#C6F24E;
  --lime-ink:#0C0D0E;
  --flame:#FF5A2B;
  --mute:#8A8C86;
  --shadow:0 1px 2px rgba(17,18,20,.04),0 18px 40px -24px rgba(17,18,20,.22);
  --shadow-lift:0 2px 6px rgba(17,18,20,.06),0 26px 50px -26px rgba(17,18,20,.30);
  --r-card:16px;
  --r-img:20px;
  --r-pill:999px;
  --font-sans:"PingFang SC","Microsoft YaHei","Source Han Sans SC",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",Menlo,Consolas,"Courier New",monospace;
  --sp-section:112px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-2);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);line-height:1.15}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font-family:inherit;color:inherit}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(245,244,240,.92);
  border-bottom:1px solid var(--line);
  transition:box-shadow 200ms ease-out;
}
.site-header.scrolled{box-shadow:0 12px 32px -26px rgba(17,18,20,.55)}
.header-inner{
  max-width:1200px;margin:0 auto;padding:0 24px;
  height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink)}
.brand-mark{
  position:relative;width:16px;height:16px;border-radius:5px;background:var(--ink);flex:0 0 16px;
}
.brand-mark::after{
  content:"";position:absolute;right:2px;top:2px;width:7px;height:7px;background:var(--lime);
  clip-path:polygon(100% 0,100% 100%,0 100%);
}
.brand-text{font-size:16px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.brand-text small{font-size:11px;font-weight:600;letter-spacing:.08em;color:var(--mute);margin-left:5px}
.main-nav{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;padding:8px 14px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;color:var(--ink-2);
  transition:color 180ms ease-out,background 180ms ease-out;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform 180ms cubic-bezier(.2,.7,.3,1);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{background:var(--ink);color:#fff}
.nav-link.active::after{display:none}
.header-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:var(--r-pill);
  background:var(--paper-2);cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--ink);transition:transform 180ms ease-out}
.nav-toggle:hover{border-color:var(--ink)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-pill);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform 180ms cubic-bezier(.2,.7,.3,1),background 180ms ease-out,color 180ms ease-out,border-color 180ms ease-out,box-shadow 180ms ease-out;
}
.btn-lime{background:var(--lime);color:var(--lime-ink)}
.btn-lime:hover{background:#b9e842;transform:translateY(-1px)}
.btn-lime:active{transform:translateY(0) scale(.99)}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0) scale(.99)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#232528;transform:translateY(-1px)}
.btn-light{background:transparent;border-color:rgba(255,255,255,.45);color:#fff}
.btn-light:hover{border-color:#fff;background:rgba(255,255,255,.10)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.btn.is-disabled,.btn[disabled]{opacity:.4;pointer-events:none}
.btn.is-loading{position:relative;color:transparent}
.btn.is-loading::after{
  content:"";position:absolute;width:16px;height:16px;border-radius:50%;
  border:2px solid rgba(12,13,14,.35);border-top-color:var(--lime-ink);animation:spin 800ms linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--paper);
  font-size:12px;font-weight:600;letter-spacing:.04em;color:var(--ink-2);white-space:nowrap;
}
.tag--new{background:var(--lime);border-color:var(--lime);color:var(--lime-ink)}
.tag--stable{background:var(--paper-2);border-color:var(--line);color:var(--ink-2)}
.tag--hot{background:var(--paper-2);border-color:rgba(255,90,43,.45);color:var(--flame)}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sp-section) 0}
.section--tight{padding:72px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;
  font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--mute);
}
.eyebrow::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--lime)}
.section-title{font-size:clamp(24px,3vw,38px);font-weight:800;letter-spacing:-.02em;line-height:1.15}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.section-sub{margin-top:16px;max-width:660px;font-size:16px;line-height:1.85;color:var(--ink-2)}
.link-more{
  font-size:14px;font-weight:600;color:var(--ink);border-bottom:2px solid var(--lime);padding-bottom:2px;
  transition:color 180ms ease-out;
}
.link-more:hover{color:#5c6b1f}

/* ---------- 页面头图 ---------- */
.page-hero{position:relative;height:260px;overflow:hidden;background:var(--ink)}
.page-hero__media{position:absolute;inset:0}
.page-hero__media img{width:100%;height:100%;object-fit:cover}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(17,18,20,.38) 0%,rgba(17,18,20,.70) 58%,rgba(17,18,20,.82) 100%);
}
.page-hero__inner{
  position:relative;z-index:2;height:100%;max-width:1200px;margin:0 auto;
  padding:24px 24px 32px;display:flex;flex-direction:column;justify-content:flex-end;color:#fff;
}
.crumb{display:flex;align-items:center;gap:8px;font-size:12px;color:rgba(255,255,255,.78);letter-spacing:.04em}
.crumb a{transition:color 180ms ease-out}
.crumb a:hover{color:var(--lime)}
.crumb span.sep{opacity:.55}
.crumb .now{color:#fff;max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.page-hero h1{
  margin:14px 0 10px;color:#fff;
  font-size:clamp(30px,4.4vw,52px);font-weight:800;letter-spacing:-.03em;line-height:1.05;
}
.page-hero__sub{font-size:16px;color:rgba(255,255,255,.86);max-width:34em}

/* ---------- 导语 ---------- */
.lead-block{padding-top:72px;padding-bottom:8px}
.lead-text{max-width:760px;font-size:17px;line-height:1.9;color:var(--ink-2)}
.stat-row{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;
  margin-top:36px;padding-top:28px;border-top:1px solid var(--line);
}
.stat b{display:block;font-family:var(--font-mono);font-size:28px;font-weight:700;color:var(--ink);letter-spacing:-.02em;line-height:1.2}
.stat span{display:block;margin-top:6px;font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--mute)}

/* ---------- 筛选 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin:32px 0 26px}
.filter-chip{
  height:34px;padding:0 16px;border-radius:var(--r-pill);border:1px solid var(--line);
  background:var(--paper-2);color:var(--ink-2);font-size:13px;font-weight:600;letter-spacing:.04em;
  cursor:pointer;transition:background 180ms ease-out,color 180ms ease-out,border-color 180ms ease-out,transform 180ms ease-out;
}
.filter-chip:hover{border-color:var(--ink);color:var(--ink);transform:translateY(-1px)}
.filter-chip.active{background:var(--ink);border-color:var(--ink);color:#fff}
.filter-chip:active{transform:translateY(0) scale(.99)}

/* ---------- 日志流 ---------- */
.log-list{border-top:1px solid var(--line)}
.log-row{
  display:grid;grid-template-columns:170px minmax(0,1fr) auto;gap:24px;align-items:center;
  padding:22px 18px;border-bottom:1px solid var(--line);
  transition:background 200ms ease-out;
}
.log-row:hover{background:var(--paper-2)}
.log-row.is-hidden{display:none}
.log-meta{display:flex;flex-direction:column;gap:2px}
.log-ver{font-family:var(--font-mono);font-size:15px;font-weight:700;color:var(--ink);letter-spacing:-.01em}
.log-date{font-family:var(--font-mono);font-size:13px;color:var(--mute)}
.log-body h3{font-size:17px;font-weight:700;line-height:1.35;margin-bottom:4px}
.log-body p{
  font-size:14px;line-height:1.75;color:var(--ink-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.log-empty{
  display:none;padding:64px 20px;text-align:center;
}
.log-empty.is-on{display:block}
.log-empty .ico{
  width:40px;height:40px;margin:0 auto 16px;border:1px solid var(--line);border-radius:12px;
  display:flex;align-items:center;justify-content:center;color:var(--mute);font-size:18px;
}
.log-empty p{font-size:15px;color:var(--mute)}

/* ---------- 场景速查 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-top:36px}
.scene-card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  transition:transform 240ms ease-out,box-shadow 240ms ease-out,border-color 240ms ease-out;
}
.scene-card:hover{transform:translateY(-2px);border-color:var(--ink);box-shadow:var(--shadow-lift)}
.scene-media{aspect-ratio:16/9;background:var(--line);overflow:hidden}
.scene-media img{width:100%;height:100%;object-fit:cover;transition:transform 400ms ease-out}
.scene-card:hover .scene-media img{transform:scale(1.03)}
.scene-body{padding:22px 24px 26px}
.scene-body .tag{margin-bottom:12px}
.scene-body h3{font-size:20px;font-weight:700;margin-bottom:8px}
.scene-body p{font-size:15px;line-height:1.8;color:var(--ink-2)}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;margin-top:32px}
.data-table{width:100%;min-width:680px;border-collapse:collapse;background:var(--paper-2);border-top:2px solid var(--ink)}
.data-table th{
  text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);
  font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--mute);white-space:nowrap;
}
.data-table td{padding:16px 18px;border-bottom:1px solid var(--line);font-size:15px;color:var(--ink-2)}
.data-table td:first-child{color:var(--ink);font-weight:700}
.data-table tr:last-child td{border-bottom:none}
.data-table tbody tr{transition:background 180ms ease-out}
.data-table tbody tr:hover{background:var(--paper)}

/* ---------- FAQ ---------- */
.faq-list{margin-top:32px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;min-height:56px;padding:12px 4px;background:none;border:0;
  display:flex;align-items:center;gap:16px;text-align:left;cursor:pointer;
  font-size:16px;font-weight:700;color:var(--ink);
  transition:color 180ms ease-out;
}
.faq-q:hover{color:#3d4a12}
.faq-num{font-family:var(--font-mono);font-size:13px;color:var(--mute);flex:0 0 28px}
.faq-icon{position:relative;width:22px;height:22px;margin-left:auto;flex:0 0 22px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--ink);transform:translate(-50%,-50%);
  transition:transform 200ms ease-out,background 200ms ease-out;
}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px}
.faq-item.open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg) scaleY(0)}
.faq-item.open .faq-q{color:var(--ink)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 240ms ease-out}
.faq-item.open .faq-a{max-height:420px}
.faq-a__inner{
  background:var(--paper-2);border-left:3px solid var(--lime);
  padding:18px 22px;margin:0 0 20px 28px;font-size:15px;line-height:1.85;color:var(--ink-2);
}

/* ---------- 深色 CTA ---------- */
.dark-cta{background:var(--ink);color:rgba(255,255,255,.74)}
.dark-cta .inner{
  display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;
  padding:72px 0;
}
.dark-cta h2{color:#fff;font-size:clamp(22px,2.6vw,34px);font-weight:800;letter-spacing:-.02em;margin-bottom:14px}
.dark-cta p{max-width:34em;font-size:15px;line-height:1.85;color:rgba(255,255,255,.72)}
.dark-cta .acts{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.7);padding:72px 0 28px}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.14);
}
.site-footer .brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px}
.site-footer .brand-mark{background:var(--lime)}
.site-footer .brand-mark::after{background:var(--ink)}
.site-footer .brand-text{color:#fff;font-weight:800;font-size:16px}
.site-footer .brand-text small{color:rgba(255,255,255,.5)}
.site-footer p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:32em}
.site-footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;letter-spacing:.02em}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:14px;color:rgba(255,255,255,.66)}
.footer-links a{transition:color 180ms ease-out}
.footer-links a:hover{color:var(--lime)}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:24px;font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 移动端覆盖层 ---------- */
.mobile-drawer{
  position:fixed;inset:0;z-index:120;background:var(--ink);color:#fff;
  padding:20px 20px 28px;display:flex;flex-direction:column;
  opacity:0;visibility:hidden;transition:opacity 220ms ease-out,visibility 220ms ease-out;
}
.mobile-drawer.open{opacity:1;visibility:visible}
.drawer-top{display:flex;align-items:center;justify-content:space-between;height:60px}
.drawer-top .brand-text{color:#fff}
.drawer-top .brand-mark{background:var(--lime)}
.drawer-top .brand-mark::after{background:var(--ink)}
.drawer-close{
  width:42px;height:42px;border-radius:var(--r-pill);border:1px solid rgba(255,255,255,.28);
  background:transparent;color:#fff;font-size:20px;line-height:1;cursor:pointer;
}
.drawer-close:hover{border-color:#fff}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin:28px 0 auto}
.drawer-nav a{
  font-size:23px;font-weight:700;line-height:1.6;color:#fff;padding:8px 0;
  border-bottom:1px solid rgba(255,255,255,.10);transition:color 180ms ease-out;
}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--lime)}

/* ---------- 动效 ---------- */
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity 240ms ease-out,transform 240ms ease-out}
.js .reveal.in{opacity:1;transform:none}
.js .reveal.in > *{transition-delay:0ms}
.js .scene-grid.in .scene-card:nth-child(2){transition-delay:60ms}
.js .scene-grid.in .scene-card:nth-child(3){transition-delay:120ms}
.js .scene-grid.in .scene-card:nth-child(4){transition-delay:180ms}

/* ---------- 断点 ---------- */
@media (max-width:1199px){
  :root{--sp-section:88px}
  .nav-link{padding:8px 10px;font-size:14px}
  .nav-link::after{left:10px;right:10px}
  .brand-text{font-size:15px}
}
@media (max-width:991px){
  :root{--sp-section:80px}
  .main-nav{display:none}
  .nav-toggle{display:inline-flex}
  .header-actions .btn{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .scene-grid{grid-template-columns:1fr}
  .log-row{grid-template-columns:150px minmax(0,1fr) auto;gap:18px}
  .dark-cta .inner{padding:60px 0}
}
@media (max-width:767px){
  :root{--sp-section:64px}
  .container{padding:0 20px}
  .header-inner{height:60px;padding:0 20px}
  .page-hero{height:200px}
  .page-hero__inner{padding:20px 20px 26px}
  .page-hero h1{margin:12px 0 8px}
  .page-hero__sub{font-size:15px}
  .stat-row{grid-template-columns:1fr;gap:18px}
  .stat b{font-size:24px}
  .log-row{grid-template-columns:1fr;gap:10px;padding:20px 14px}
  .log-meta{flex-direction:row;align-items:center;gap:12px}
  .log-row .tag{justify-self:start}
  .faq-a__inner{margin-left:0}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .dark-cta .inner{padding:52px 0;gap:24px}
  .btn{height:44px;padding:0 20px}
  .btn-sm{height:40px}
}
@media (max-width:400px){
  .brand-text{font-size:14px}
  .brand-text small{display:inline}
  .page-hero h1{font-size:28px;word-break:break-word}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .js .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category4 */
:root{
  --ink:#111214;
  --ink-2:#3A3E45;
  --paper:#F5F4F0;
  --paper-2:#FFFFFF;
  --line:#E2E0D9;
  --lime:#C6F24E;
  --lime-ink:#0C0D0E;
  --flame:#FF5A2B;
  --mute:#8A8C86;
  --radius-card:16px;
  --radius-img:20px;
  --radius-pill:999px;
  --shadow:0 1px 2px rgba(17,18,20,.04),0 18px 40px -24px rgba(17,18,20,.22);
  --shadow-hover:0 2px 4px rgba(17,18,20,.06),0 26px 52px -24px rgba(17,18,20,.30);
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,monospace;
  --sans:"PingFang SC","Microsoft YaHei","Source Han Sans SC",Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:800;letter-spacing:-.02em;line-height:1.15}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
input,select,textarea{font-family:inherit;font-size:16px}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 通用标签与 eyebrow ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--ink-2);
}
.eyebrow::before{content:"";width:8px;height:8px;background:var(--lime);border-radius:2px;flex:none}
.tag-pill{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:var(--radius-pill);font-size:12px;font-weight:600;letter-spacing:.08em;
  background:var(--paper);border:1px solid var(--line);color:var(--ink-2);white-space:nowrap;
}
.tag-pill-lime{background:var(--lime);color:var(--lime-ink);border-color:transparent}
.tag-pill-flame{background:rgba(255,90,43,.12);color:var(--flame);border-color:rgba(255,90,43,.28)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;transition:background-color 180ms var(--ease),color 180ms var(--ease),transform 180ms var(--ease),border-color 180ms var(--ease),filter 180ms var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--lime);color:var(--lime-ink)}
.btn-primary:hover{filter:brightness(.94);transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-1px)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#000;transform:translateY(-1px)}
.btn-light{background:transparent;border-color:rgba(255,255,255,.45);color:#fff}
.btn-light:hover{background:#fff;color:var(--ink);border-color:#fff;transform:translateY(-1px)}
.btn:active{transform:scale(.99)}
.btn:disabled,.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;filter:none}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(245,244,240,.94);
  border-bottom:1px solid var(--line);
  transition:box-shadow 220ms var(--ease);
}
.site-header.is-scrolled{box-shadow:0 10px 30px -22px rgba(17,18,20,.45)}
.header-inner{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:16px;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.brand-mark{position:relative;width:16px;height:16px;border-radius:4px;background:var(--ink);overflow:hidden;flex:none}
.brand-mark::after{content:"";position:absolute;right:-4px;bottom:-4px;width:12px;height:12px;background:var(--lime);transform:rotate(45deg)}
.brand-text small{font-size:11px;font-weight:600;color:var(--mute);letter-spacing:.08em;margin-left:6px}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;padding:8px 12px;font-size:15px;font-weight:600;color:var(--ink-2);
  transition:color 180ms var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;
  transition:transform 180ms var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link.active{color:var(--ink)}
.header-actions{display:flex;align-items:center;gap:12px}
.menu-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:var(--paper-2);cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform 180ms var(--ease),opacity 180ms var(--ease)}
.mobile-drawer{
  position:fixed;inset:0;z-index:130;background:var(--ink);color:#fff;
  padding:0 20px 28px;display:flex;flex-direction:column;overflow-y:auto;
}
.mobile-drawer[hidden]{display:none}
.drawer-top{height:60px;display:flex;align-items:center;justify-content:space-between;flex:none}
.mobile-drawer .brand{color:#fff}
.mobile-drawer .brand-text small{color:rgba(255,255,255,.55)}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid rgba(255,255,255,.22);
  background:transparent;color:#fff;font-size:20px;line-height:1;cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;margin-top:12px}
.drawer-link{
  color:#fff;font-size:22px;font-weight:700;line-height:1.6;padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,.14);transition:color 180ms var(--ease)
}
.drawer-link:hover,.drawer-link.active{color:var(--lime)}
.drawer-cta{margin-top:28px}

/* ---------- 窄版头图 ---------- */
.page-hero{position:relative;height:260px;overflow:hidden}
.page-hero img{width:100%;height:100%;object-fit:cover;object-position:center 40%}
.page-hero-mask{position:absolute;inset:0;background:rgba(17,18,20,.7)}
.page-hero-inner{
  position:absolute;left:0;right:0;bottom:0;
  max-width:1200px;margin:0 auto;padding:0 24px 30px;
  display:flex;flex-direction:column;align-items:flex-start;gap:14px;
}
.page-hero h1{
  color:#fff;font-size:clamp(34px,5.2vw,60px);font-weight:800;letter-spacing:-.03em;line-height:1.05;
  word-break:break-word;
}
.page-hero-sub{color:rgba(255,255,255,.86);font-size:15px;line-height:1.7;letter-spacing:.01em}

/* ---------- 板块与导读 ---------- */
.section{padding:96px 0}
.section-tight{padding:64px 0}
.paper-block{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-head h2{font-size:clamp(24px,3vw,38px)}
.section-lead{max-width:760px;color:var(--ink-2);font-size:17px;line-height:1.85}
.lead-block{padding:56px 0 0}
.lead-block p{max-width:820px;color:var(--ink-2);font-size:17px;line-height:1.9}

/* ---------- 指标 ---------- */
.metrics{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  margin-top:36px;padding-top:28px;border-top:1px solid var(--line);
}
.metric-num{font-family:var(--mono);font-size:32px;font-weight:700;letter-spacing:-.02em;color:var(--ink);line-height:1.1}
.metric-label{display:block;margin-top:6px;font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--mute)}

/* ---------- 左右分栏 ---------- */
.split{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:56px;align-items:start}
.split-main{min-width:0}
.topic{padding:32px 0;border-bottom:1px solid var(--line)}
.topic:first-child{padding-top:0}
.topic:last-child{border-bottom:0;padding-bottom:0}
.topic h3{font-size:21px;font-weight:700;line-height:1.35;margin:12px 0 14px;letter-spacing:-.01em}
.topic p{color:var(--ink-2);font-size:16px;line-height:1.88;max-width:640px}
.dot-list{margin-top:16px;display:flex;flex-direction:column;gap:8px}
.dot-list li{position:relative;padding-left:18px;font-size:15px;line-height:1.8;color:var(--ink-2)}
.dot-list li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;background:var(--lime);border-radius:1px}
.split-figure{margin:32px 0;border-radius:var(--radius-img);overflow:hidden;box-shadow:var(--shadow)}
.split-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform 400ms var(--ease)}
.split-figure:hover img{transform:scale(1.03)}
.split-figure figcaption{background:var(--paper-2);border-top:1px solid var(--line);padding:12px 16px;font-size:13px;color:var(--mute)}

/* ---------- 右侧摘要卡 ---------- */
.split-aside{position:sticky;top:96px}
.summary-card{
  background:var(--paper-2);border:1px solid var(--line);border-left:3px solid var(--lime);
  border-radius:var(--radius-card);padding:26px;box-shadow:var(--shadow);
}
.summary-card h3{font-size:18px;font-weight:800;margin-bottom:6px}
.summary-card .summary-sub{font-size:13px;color:var(--mute);margin-bottom:18px}
.summary-list{display:flex;flex-direction:column}
.summary-list li{
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  padding:11px 0;border-bottom:1px solid var(--line);font-size:14px;color:var(--ink-2);
}
.summary-list li:last-child{border-bottom:0}
.summary-list .val{font-family:var(--mono);font-size:13px;font-weight:700;color:var(--ink);white-space:nowrap}
.summary-card .btn{margin-top:20px}
.summary-note{margin-top:14px;font-size:12px;line-height:1.7;color:var(--mute)}

/* ---------- 提示条 ---------- */
.notice{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:18px 20px;margin-top:28px;
}
.notice-icon{
  flex:none;width:32px;height:32px;border-radius:10px;background:var(--ink);color:var(--lime);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-family:var(--mono);font-size:14px;
}
.notice p{font-size:14px;line-height:1.8;color:var(--ink-2)}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:16px;
  min-height:56px;padding:10px 4px;font-size:16px;font-weight:700;color:var(--ink);
  transition:color 180ms var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--lime-ink)}
.faq-index{font-family:var(--mono);font-size:13px;font-weight:700;color:var(--mute);flex:none}
.faq-q{flex:1;min-width:0}
.faq-icon{position:relative;flex:none;width:16px;height:16px;transition:transform 200ms var(--ease)}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--ink);transform:translate(-50%,-50%);
}
.faq-icon::before{width:14px;height:2px;border-radius:2px}
.faq-icon::after{width:2px;height:14px;border-radius:2px;transition:transform 200ms var(--ease),opacity 200ms var(--ease)}
.faq-item[open] .faq-icon{transform:rotate(180deg)}
.faq-item[open] .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0}
.faq-body{
  background:var(--paper-2);border-left:3px solid var(--lime);
  border-radius:0 12px 12px 0;padding:20px 22px;margin:0 0 18px;
  font-size:15px;line-height:1.9;color:var(--ink-2);
}

/* ---------- 深色 CTA 通栏 ---------- */
.cta-band{background:var(--ink);color:#fff;padding:80px 0}
.cta-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.cta-band h2{color:#fff;font-size:clamp(24px,3vw,38px);margin-bottom:14px}
.cta-band p{color:rgba(255,255,255,.75);font-size:16px;line-height:1.85;max-width:520px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:flex-end}
.cta-meta{
  display:flex;gap:28px;flex-wrap:wrap;margin-top:26px;
  padding-top:20px;border-top:1px solid rgba(255,255,255,.14);
}
.cta-meta span{font-size:13px;color:rgba(255,255,255,.6)}
.cta-meta b{font-family:var(--mono);color:var(--lime);font-weight:700}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);color:rgba(255,255,255,.72);
  padding:72px 0 0;border-top:1px solid rgba(255,255,255,.14);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:48px}
.site-footer .brand{color:#fff}
.site-footer .brand-text small{color:rgba(255,255,255,.5)}
.site-footer p{max-width:330px;margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.7)}
.site-footer h4{color:#fff;font-size:14px;letter-spacing:.08em;font-weight:700;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:14px}
.footer-links a,.footer-links span{color:rgba(255,255,255,.72);transition:color 180ms var(--ease)}
.footer-links a:hover{color:var(--lime)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);padding:20px 0 26px;
  display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- 动效 ---------- */
html.js .reveal{opacity:0;transform:translateY(12px);transition:opacity 240ms ease-out,transform 240ms ease-out}
html.js .reveal.is-visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .split{grid-template-columns:minmax(0,1fr) 320px;gap:40px}
}
@media (max-width:991px){
  .main-nav{display:none}
  .menu-toggle{display:flex}
  .header-inner{height:60px}
  .section{padding:80px 0}
  .section-tight{padding:56px 0}
  .split{grid-template-columns:1fr;gap:40px}
  .split-aside{position:static}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-grid{grid-template-columns:1fr;gap:32px}
  .cta-actions{justify-content:flex-start}
  .page-hero{height:220px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:64px 0}
  .section-tight{padding:48px 0}
  .page-hero{height:200px}
  .page-hero-inner{padding:0 20px 22px;gap:10px}
  .metrics{grid-template-columns:1fr;gap:18px;padding-top:22px;margin-top:28px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
  .cta-band{padding:64px 0}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .btn{height:44px}
  .split-figure{margin:24px 0}
}
@media (max-width:400px){
  .page-hero h1{font-size:clamp(30px,9vw,40px)}
  .brand-text small{display:none}
  .summary-card{padding:20px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  html.js .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category5 */
:root{
  --ink:#111214;
  --ink-2:#3A3E45;
  --paper:#F5F4F0;
  --paper-2:#FFFFFF;
  --line:#E2E0D9;
  --lime:#C6F24E;
  --lime-ink:#0C0D0E;
  --flame:#FF5A2B;
  --mute:#8A8C86;

  --font-sans:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Hiragino Sans GB",Inter,system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;

  --radius-card:16px;
  --radius-img:20px;
  --radius-pill:999px;

  --shadow:0 1px 2px rgba(17,18,20,.04),0 18px 40px -24px rgba(17,18,20,.22);
  --shadow-lg:0 2px 4px rgba(17,18,20,.05),0 30px 56px -28px rgba(17,18,20,.3);

  --space-section:112px;
  --space-section-tablet:80px;
  --space-section-mobile:64px;

  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-2);
  background:var(--paper);
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:800}
p{margin:0}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
ul{margin:0;padding:0;list-style:none}
::selection{background:var(--lime);color:var(--lime-ink)}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(245,244,240,.92);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease-out;
}
.site-header.is-scrolled{box-shadow:0 10px 30px -22px rgba(17,18,20,.45)}
.header-inner{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  position:relative;width:18px;height:18px;border-radius:5px;background:var(--ink);
  overflow:hidden;flex:none;display:inline-block;
}
.brand-mark::after{
  content:"";position:absolute;right:-5px;bottom:-5px;width:13px;height:13px;
  background:var(--lime);transform:rotate(45deg);
}
.brand-text{font-size:16px;font-weight:800;color:var(--ink);letter-spacing:-.02em;white-space:nowrap}
.brand-text small{font-size:11px;font-weight:600;color:var(--mute);margin-left:6px;letter-spacing:.14em}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;padding:8px 14px;font-size:15px;font-weight:600;color:var(--ink-2);
  border-radius:var(--radius-pill);transition:color .18s ease-out,background-color .18s ease-out;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{background:var(--ink);color:#fff}
.nav-link.active::after{display:none}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:8px}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-pill);
  background:var(--paper-2);cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .22s var(--ease),opacity .22s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.mobile-nav{
  position:fixed;inset:0;z-index:90;background:var(--ink);color:#fff;
  display:flex;flex-direction:column;padding:20px 20px 32px;gap:8px;
  opacity:0;visibility:hidden;transform:translateY(-12px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
}
.mobile-nav.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.mobile-nav-top{display:flex;align-items:center;justify-content:space-between;height:60px;margin-bottom:8px}
.mobile-nav .brand-text{color:#fff}
.mobile-nav .brand-text small{color:rgba(255,255,255,.55)}
.mobile-nav-close{
  width:44px;height:44px;border-radius:var(--radius-pill);border:1px solid rgba(255,255,255,.24);
  background:transparent;color:#fff;font-size:20px;line-height:1;cursor:pointer;
}
.mobile-nav a.m-link{
  font-size:22px;font-weight:700;line-height:1.6;color:#fff;padding:10px 0;
  border-bottom:1px solid rgba(255,255,255,.14);
}
.mobile-nav a.m-link.is-active{color:var(--lime)}
.mobile-nav-foot{margin-top:auto;display:flex;flex-direction:column;gap:14px}
.mobile-nav-foot .btn{width:100%;justify-content:center}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;border:1px solid transparent;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--lime);color:var(--lime-ink);border-color:var(--lime)}
.btn-primary:hover{background:#b8e63f;border-color:#b8e63f;transform:translateY(-1px)}
.btn-primary:active{transform:scale(.99);background:var(--lime)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-1px)}
.btn-ghost:active{transform:scale(.99)}
.btn-dark{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn-dark:hover{background:#22242a;border-color:#22242a;transform:translateY(-1px)}
.btn-dark:active{transform:scale(.99)}
.btn-sm{height:44px;padding:0 20px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none;cursor:not-allowed}
.btn.is-loading{opacity:.75;pointer-events:none}
.btn.is-loading::before{
  content:"";width:14px;height:14px;border-radius:50%;
  border:2px solid currentColor;border-top-color:transparent;animation:spin .7s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- hero (narrow) ---------- */
.page-hero{
  position:relative;height:260px;display:flex;align-items:flex-end;
  background-image:linear-gradient(to top,rgba(17,18,20,.78) 0%,rgba(17,18,20,.55) 45%,rgba(17,18,20,.35) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
}
.page-hero .container{padding-bottom:34px}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.08em;
  color:rgba(255,255,255,.8);margin-bottom:12px;
}
.hero-eyebrow i{width:8px;height:8px;background:var(--lime);display:inline-block;border-radius:1px}
.page-hero h1{
  color:#fff;font-size:clamp(34px,5.6vw,58px);font-weight:800;letter-spacing:-.03em;line-height:1.05;
  word-break:break-word;
}
.page-hero h1 em{font-style:normal;color:var(--lime);font-size:.56em;font-weight:700;letter-spacing:0;margin-left:12px;vertical-align:middle}
.page-hero .hero-sub{color:rgba(255,255,255,.86);font-size:15px;margin-top:10px;max-width:640px}

/* ---------- breadcrumb ---------- */
.crumb{padding:22px 0 0;font-size:12px;color:var(--mute);letter-spacing:.04em}
.crumb a:hover{color:var(--ink)}
.crumb span.sep{margin:0 8px;color:var(--line)}
.crumb .cur{color:var(--ink-2);font-weight:600;max-width:52%;display:inline-block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;vertical-align:bottom}

/* ---------- sections ---------- */
.section{padding:var(--space-section) 0}
.section-tight{padding:72px 0}
.section-head{max-width:780px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.08em;
  color:var(--mute);margin-bottom:16px;
}
.eyebrow i{width:8px;height:8px;background:var(--lime);display:block;border-radius:1px}
h2{font-size:clamp(24px,3vw,38px);font-weight:800;letter-spacing:-.02em;line-height:1.15}
.section-lead{margin-top:18px;font-size:16.5px;line-height:1.85;max-width:660px}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- intro ---------- */
.intro-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:48px;align-items:start}
.intro-copy p+p{margin-top:16px}
.intro-aside{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 24px;box-shadow:var(--shadow);
}
.intro-aside h3{font-size:18px;margin-bottom:14px}
.intro-aside ul li{
  display:flex;gap:10px;padding:10px 0;border-bottom:1px dashed var(--line);font-size:15px;color:var(--ink-2);
}
.intro-aside ul li:last-child{border-bottom:0}
.intro-aside ul li::before{content:"";width:6px;height:6px;background:var(--lime);flex:none;margin-top:11px;border-radius:1px}
.intro-note{margin-top:16px;font-size:12.5px;color:var(--mute);letter-spacing:.03em}

/* ---------- matrix 2x2 ---------- */
.matrix-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:44px}
.matrix-tile{
  position:relative;display:flex;gap:20px;align-items:flex-start;
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:34px 32px;min-height:168px;box-shadow:var(--shadow);
  transition:background-color .26s var(--ease),color .26s var(--ease),border-color .26s var(--ease),transform .26s var(--ease),box-shadow .26s var(--ease);
}
.matrix-tile:hover,.matrix-tile:focus-visible{
  background:var(--ink);border-color:var(--ink);transform:translateY(-2px);box-shadow:var(--shadow-lg);
}
.tile-icon{
  width:52px;height:52px;flex:none;border-radius:14px;background:var(--paper);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;transition:background-color .26s var(--ease),border-color .26s var(--ease);
}
.tile-icon svg{width:24px;height:24px;stroke:var(--ink);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;transition:stroke .26s var(--ease)}
.matrix-tile:hover .tile-icon{background:var(--lime);border-color:var(--lime)}
.tile-body strong{display:block;font-size:20px;font-weight:800;color:var(--ink);letter-spacing:-.01em;transition:color .26s var(--ease)}
.tile-body span{display:block;margin-top:10px;font-size:15px;line-height:1.75;color:var(--ink-2);transition:color .26s var(--ease)}
.matrix-tile:hover .tile-body strong{color:#fff}
.matrix-tile:hover .tile-body span{color:rgba(255,255,255,.72)}
.tile-arrow{
  margin-left:auto;font-family:var(--font-mono);font-size:18px;color:var(--mute);flex:none;
  transition:transform .22s var(--ease),color .22s var(--ease);
}
.matrix-tile:hover .tile-arrow{transform:translateX(6px);color:var(--lime)}
.tile-tag{
  display:inline-block;margin-top:16px;height:26px;line-height:24px;padding:0 12px;border-radius:var(--radius-pill);
  background:var(--paper);border:1px solid var(--line);font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--ink-2);
  transition:background-color .26s var(--ease),color .26s var(--ease),border-color .26s var(--ease);
}
.matrix-tile:hover .tile-tag{background:var(--lime);border-color:var(--lime);color:var(--lime-ink)}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:48px}
.step{border-top:2px solid var(--ink);padding-top:20px}
.step .num{
  font-family:var(--font-mono);font-size:34px;font-weight:700;color:var(--ink);letter-spacing:-.02em;line-height:1;
}
.step h3{font-size:17px;margin-top:14px}
.step p{margin-top:10px;font-size:14.5px;line-height:1.8;color:var(--ink-2)}

/* ---------- form ---------- */
.join{
  background:var(--ink);color:#fff;padding:var(--space-section) 0;
}
.join-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.join h2{color:#fff}
.join .eyebrow{color:rgba(255,255,255,.62)}
.join p.lead{margin-top:18px;color:rgba(255,255,255,.78);font-size:16px;line-height:1.85;max-width:460px}
.join-facts{margin-top:34px;display:grid;gap:18px;max-width:420px}
.join-facts .fact{display:flex;justify-content:space-between;gap:16px;padding-bottom:12px;border-bottom:1px solid rgba(255,255,255,.14);font-size:14.5px}
.join-facts .fact span:first-child{color:rgba(255,255,255,.62)}
.join-facts .fact span:last-child{font-family:var(--font-mono);color:#fff}

.form{display:grid;gap:28px}
.field{position:relative;display:grid;gap:8px}
.field label{font-size:12px;font-weight:600;letter-spacing:.08em;color:rgba(255,255,255,.62)}
.field input,.field select,.field textarea{
  width:100%;background:transparent;border:0;border-bottom:1px solid rgba(255,255,255,.3);
  padding:8px 0 12px;font-size:16px;color:#fff;border-radius:0;
  transition:border-color .2s var(--ease),border-width .2s var(--ease);
}
.field textarea{resize:vertical;min-height:72px;line-height:1.7}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,rgba(255,255,255,.7) 50%),linear-gradient(135deg,rgba(255,255,255,.7) 50%,transparent 50%);background-position:calc(100% - 14px) 20px,calc(100% - 8px) 20px;background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.35)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-bottom:2px solid var(--lime);padding-bottom:11px}
.field select option{color:var(--ink);background:#fff}
.form-foot{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.form-hint{font-size:12.5px;color:rgba(255,255,255,.5);letter-spacing:.03em}
.form-msg{font-size:13px;color:var(--lime);min-height:18px}

/* ---------- dark cta ---------- */
.cta-band{border-top:1px solid rgba(255,255,255,.14)}
.cta{
  background:var(--ink);color:#fff;border-radius:var(--radius-card);
  padding:56px 48px;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;
}
.cta h2{color:#fff;font-size:clamp(22px,2.4vw,32px)}
.cta p{margin-top:12px;color:rgba(255,255,255,.72);max-width:520px}
.cta .cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 0;margin-top:0}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.14);
}
.site-footer .brand-text{color:#fff}
.site-footer .brand-text small{color:rgba(255,255,255,.5)}
.site-footer p{margin-top:18px;font-size:14.5px;line-height:1.85;max-width:320px}
.site-footer h4{color:#fff;font-size:14px;letter-spacing:.06em;margin-bottom:18px;font-weight:700}
.footer-links{display:grid;gap:12px;font-size:14.5px}
.footer-links a,.footer-links span{color:rgba(255,255,255,.68);transition:color .18s ease-out}
.footer-links a:hover{color:var(--lime)}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:24px 0 32px;font-size:12.5px;color:rgba(255,255,255,.45);letter-spacing:.03em;
}

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

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .main-nav{gap:0}
  .nav-link{padding:8px 10px;font-size:14px}
}
@media (max-width:991px){
  :root{--space-section:var(--space-section-tablet)}
  .main-nav{display:none}
  .nav-toggle{display:flex}
  .header-actions{margin-left:auto}
  .intro-grid{grid-template-columns:1fr;gap:32px}
  .matrix-grid{grid-template-columns:1fr 1fr;gap:20px}
  .steps{grid-template-columns:repeat(2,1fr);gap:28px}
  .join-grid{grid-template-columns:1fr;gap:40px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  :root{--space-section:var(--space-section-mobile)}
  .container{padding:0 20px}
  .header-inner{height:60px}
  .brand-text{font-size:15px}
  .brand-text small{display:none}
  .header-actions .btn{display:none}
  .page-hero{height:200px}
  .page-hero .container{padding-bottom:24px}
  .page-hero h1 em{display:block;margin:8px 0 0;font-size:.5em}
  .matrix-grid{grid-template-columns:1fr}
  .matrix-tile{padding:26px 22px;min-height:0}
  .steps{grid-template-columns:1fr;gap:24px}
  .cta{padding:36px 24px;flex-direction:column;align-items:flex-start;gap:26px}
  .cta .cta-actions{width:100%}
  .cta .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:34px}
  .footer-bottom{flex-direction:column;gap:8px}
  .section-tight{padding:56px 0}
  .crumb .cur{max-width:44%}
}
@media (max-width:400px){
  .page-hero h1{font-size:30px;letter-spacing:-.02em;word-break:break-word}
  .brand-text{font-size:14px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}