/* roulang page: index */
:root{
  --paper:#F7F6F2;
  --surface:#FFFFFF;
  --ink:#14161A;
  --ink-soft:#3B4048;
  --muted:#83888F;
  --line:#E4E1D9;
  --volt:#CDF24C;
  --volt-ink:#6E8A0F;
  --spark:#FF6A2C;
  --ok:#3E9E5A;
  --warn:#D9A21B;
  --err:#D64545;
  --ph:#E9E7E0;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --shadow-card:0 1px 2px rgba(20,22,26,.04), 0 12px 28px -16px rgba(20,22,26,.14);
  --shadow-dock:0 10px 36px -12px rgba(20,22,26,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
  --sans:system-ui,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"IBM Plex 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(--sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
p{margin:0 0 1.1em}
h1,h2,h3,h4{margin:0;line-height:1.2;font-weight:700}
ul{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
:focus-visible{outline:2px solid var(--volt);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono);letter-spacing:.02em}
.eyebrow{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
  display:flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--line)}
.section{padding:64px 0}
.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(26px,3.2vw,38px);letter-spacing:-.01em}
.section-head p{color:var(--ink-soft);max-width:520px;margin:10px 0 0;font-size:16px}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:600;
  font-size:15px;
  color:var(--ink);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease);
}
.link-arrow svg{transition:transform .2s var(--ease)}
.link-arrow:hover svg{transform:translateX(4px)}
.link-arrow:hover{color:var(--volt-ink)}

/* ============ Dock 导航 ============ */
.dock-wrap{position:fixed;top:16px;left:0;right:0;z-index:60;padding:0 16px;pointer-events:none}
.dock{
  pointer-events:auto;
  max-width:1080px;
  margin:0 auto;
  display:flex;
  align-items:center;
  gap:20px;
  padding:10px 12px 10px 20px;
  background:rgba(247,246,242,.74);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  box-shadow:var(--shadow-dock);
  transition:background .24s var(--ease),box-shadow .24s var(--ease);
}
.dock.is-scrolled{background:rgba(247,246,242,.94)}
.brand{display:flex;flex-direction:column;line-height:1.05;flex:0 0 auto}
.brand__main{font-weight:800;font-size:18px;letter-spacing:-.02em}
.brand__sub{font-size:11px;letter-spacing:.22em;color:var(--muted);font-family:var(--mono)}
.dock-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.dock-link{
  position:relative;
  font-size:14.5px;
  color:var(--ink-soft);
  padding:9px 13px;
  border-radius:var(--r-pill);
  transition:color .18s var(--ease),background .18s var(--ease);
  white-space:nowrap;
}
.dock-link:hover{color:var(--ink);background:rgba(20,22,26,.05)}
.dock-link.is-active{color:var(--ink);font-weight:600}
.dock-link.is-active::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:1px;
  width:4px;height:4px;
  margin-left:-2px;
  border-radius:50%;
  background:var(--volt);
}
.dock-nav__cta{display:none}
.dock-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.icon-btn{
  width:40px;height:40px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--ink-soft);
  transition:border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.icon-btn:hover{border-color:var(--ink);color:var(--ink);transform:translateY(-1px)}
.dock-toggle{display:none}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 26px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;
}
.btn svg{transition:transform .2s var(--ease)}
.btn:hover svg{transform:translateX(4px)}
.btn-primary{background:var(--ink);color:var(--paper)}
.btn-primary:hover{background:var(--volt);color:var(--ink);transform:translateY(-2px)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-2px)}
.btn-volt{background:var(--volt);color:var(--ink)}
.btn-volt:hover{background:var(--paper);color:var(--ink);transform:translateY(-2px)}
.btn-sm{padding:10px 20px;font-size:14px}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.4;cursor:not-allowed;transform:none}

/* ============ Hero ============ */
.hero{position:relative;padding:158px 0 72px;overflow:hidden}
.hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:repeating-linear-gradient(115deg,rgba(20,22,26,.05) 0 1px,transparent 1px 26px);
  opacity:.5;
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.hero h1{
  font-size:clamp(38px,4.6vw,62px);
  font-weight:800;
  line-height:1.1;
  letter-spacing:-.01em;
  margin:20px 0 0;
}
.hl{
  background-image:linear-gradient(var(--volt),var(--volt));
  background-repeat:no-repeat;
  background-size:100% 32%;
  background-position:0 88%;
  padding:0 .08em;
}
.hero-sub{font-size:19px;color:var(--ink-soft);margin:20px 0 0;max-width:520px}
.hero-cta{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}
.stat-row{display:flex;gap:34px;flex-wrap:wrap;margin-top:44px}
.stat{border-left:1px solid var(--line);padding-left:16px;min-width:112px}
.stat__num{font-family:var(--mono);font-size:26px;font-weight:600;line-height:1.2}
.stat__label{font-size:13px;color:var(--muted);margin-top:2px}
.hero-visual{position:relative}
.hero-visual__main{
  border-radius:var(--r-lg);
  overflow:hidden;
  background:var(--ph);
  aspect-ratio:4/5;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.hero-visual__main img{width:100%;height:100%;object-fit:cover}
.hero-visual__mini{
  position:absolute;
  left:-32px;
  bottom:-28px;
  width:56%;
  aspect-ratio:4/3;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:6px solid var(--paper);
  background:var(--ph);
  transform:rotate(-1deg);
  box-shadow:var(--shadow-card);
}
.hero-visual__mini img{width:100%;height:100%;object-fit:cover}
.hero-tag{
  position:absolute;
  top:18px;right:-14px;
  background:var(--ink);
  color:var(--paper);
  border-radius:var(--r-pill);
  padding:8px 16px;
  font-size:12px;
  font-family:var(--mono);
  letter-spacing:.1em;
  box-shadow:var(--shadow-dock);
}

/* ============ 卖点三连 ============ */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;align-items:start}
.feature{position:relative;padding-top:0}
.feature::before{
  content:"";
  display:block;
  height:1px;
  background:var(--line);
  margin-bottom:26px;
  transition:height .22s var(--ease),background .22s var(--ease);
}
.feature:hover::before{height:3px;background:var(--volt)}
.feature__no{
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.14em;
  color:var(--muted);
  display:inline-block;
  transition:transform .22s var(--ease),color .22s var(--ease);
}
.feature:hover .feature__no{transform:translateX(4px);color:var(--volt-ink)}
.feature h3{font-size:21px;margin:14px 0 12px;font-weight:600}
.feature p{color:var(--ink-soft);font-size:15.5px;margin:0}
.feature--dark{
  background:var(--ink);
  color:var(--paper);
  border-radius:var(--r-lg);
  padding:32px 28px 34px;
  margin-top:40px;
}
.feature--dark::before{display:none}
.feature--dark .feature__no{color:var(--volt)}
.feature--dark h3{color:#fff}
.feature--dark p{color:rgba(247,246,242,.76)}

/* ============ 场景 Tab ============ */
.scene{display:grid;grid-template-columns:5fr 7fr;gap:52px;align-items:start}
.scene-left{position:sticky;top:118px}
.scene-tabs{display:flex;gap:26px;border-bottom:1px solid var(--line);margin:26px 0 22px}
.tab{
  position:relative;
  padding:12px 2px;
  font-size:15px;
  color:var(--muted);
  transition:color .18s var(--ease);
}
.tab:hover{color:var(--ink)}
.tab.is-active{color:var(--ink);font-weight:600}
.tab.is-active::after{
  content:"";
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:var(--volt);
  transition:transform .24s var(--ease);
}
.scene-copy h3{font-size:22px;margin-bottom:12px}
.scene-copy p{color:var(--ink-soft);font-size:15.5px}
.scene-list{margin-top:18px}
.scene-list li{
  position:relative;
  padding-left:20px;
  font-size:15px;
  color:var(--ink-soft);
  line-height:1.9;
}
.scene-list li::before{
  content:"";
  position:absolute;left:0;top:.72em;
  width:7px;height:7px;border-radius:50%;
  background:var(--volt);
}
.scene-panels{position:relative}
.scene-panel{display:none}
.scene-panel.is-active{display:block;animation:fadeUp .32s var(--ease) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.scene-stage{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--shadow-card);
}
.scene-stage__bar{display:flex;gap:6px;padding:12px 16px;border-bottom:1px solid var(--line);background:var(--paper)}
.scene-stage__bar span{width:9px;height:9px;border-radius:50%;background:var(--line)}
.scene-stage__bar span:first-child{background:var(--volt)}
.scene-stage__img{aspect-ratio:16/10;background:var(--ph)}
.scene-stage__img img{width:100%;height:100%;object-fit:cover}
.scene-stage__cap{
  font-size:13px;
  color:var(--muted);
  padding:14px 20px 18px;
  margin:0;
  border-top:1px solid var(--line);
}

/* ============ 最新信息 CMS ============ */
.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card);border-color:#d8d4ca}
.post-card--wide{grid-column:span 2}
.post-card--wide .post-card__body{display:grid;grid-template-columns:1fr;gap:4px}
.post-card__cover{display:block;aspect-ratio:16/9;background:var(--ph);overflow:hidden}
.post-card__cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.post-card:hover .post-card__cover img{transform:scale(1.03)}
.post-card__body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-card__tag{
  align-self:flex-start;
  background:var(--volt);
  color:var(--ink);
  font-size:12px;
  font-weight:600;
  padding:3px 10px;
  border-radius:var(--r-sm);
}
.post-card__title{
  font-size:19px;
  font-weight:600;
  line-height:1.45;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.post-card__excerpt{
  color:var(--ink-soft);
  font-size:14.5px;
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin:0;
}
.post-card__meta{
  margin-top:auto;
  padding-top:12px;
  border-top:1px solid var(--line);
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  font-family:var(--mono);
  font-size:12.5px;
  color:var(--muted);
}
.post-card__meta span{display:inline-flex;align-items:center;gap:6px}
.post-card__meta span::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--volt)}
.post-card__meta span:first-child::before{background:var(--spark)}
.empty-state{
  grid-column:1/-1;
  text-align:center;
  padding:64px 24px;
  border:1px dashed var(--line);
  border-radius:var(--r-md);
  background:var(--surface);
}
.empty-state__shape{
  width:72px;height:48px;
  margin:0 auto 18px;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  position:relative;
}
.empty-state__shape::after{
  content:"";
  position:absolute;left:12px;right:12px;top:14px;height:2px;
  background:var(--line);
  box-shadow:0 8px 0 var(--line),0 16px 0 var(--line);
}
.empty-state p{color:var(--muted);margin:0 0 14px}

/* ============ 社会认同 ============ */
.trust{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.trust-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding-bottom:48px;border-bottom:1px solid var(--line)}
.trust-stat__num{font-family:var(--mono);font-size:40px;font-weight:600;line-height:1.1}
.trust-stat__label{font-size:13px;color:var(--muted);margin-top:8px}
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-top:48px}
.quote{border-left:2px solid var(--volt);padding-left:18px}
.quote p{font-size:17px;line-height:1.7;color:var(--ink);margin:0 0 12px}
.quote cite{font-style:normal;font-size:13px;color:var(--muted)}
.partners{display:flex;flex-wrap:wrap;gap:14px 34px;margin-top:48px;padding-top:28px;border-top:1px solid var(--line)}
.partners span{font-size:14px;color:var(--muted);transition:color .2s var(--ease);font-weight:600;letter-spacing:.02em}
.partners span:hover{color:var(--ink)}

/* ============ FAQ ============ */
.faq{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;
  justify-content:space-between;
  gap:20px;
  text-align:left;
  padding:22px 0;
  font-size:18px;
  font-weight:600;
  transition:color .18s var(--ease);
}
.faq-q:hover{color:var(--volt-ink)}
.faq-icon{
  flex:0 0 auto;
  width:26px;height:26px;
  position:relative;
  transition:transform .24s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--ink);
  border-radius:2px;
}
.faq-icon::before{left:12px;top:4px;width:2px;height:18px}
.faq-icon::after{left:4px;top:12px;width:18px;height:2px}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:var(--volt-ink)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease)}
.faq-a__inner{
  padding:0 0 24px 18px;
  border-left:2px solid var(--volt);
  margin-left:2px;
  font-size:15px;
  line-height:1.85;
  color:var(--ink-soft);
}

/* ============ 底部 CTA ============ */
.cta-band{
  background:var(--ink);
  color:var(--paper);
  border-radius:var(--r-lg);
  padding:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(24px,3vw,34px);color:#fff}
.cta-band p{color:rgba(247,246,242,.72);margin:14px 0 0;max-width:520px;font-size:16px}
.cta-band__actions{display:flex;gap:14px;flex-wrap:wrap}
.cta-band .btn-ghost{border-color:rgba(247,246,242,.5);color:var(--paper)}
.cta-band .btn-ghost:hover{background:var(--paper);color:var(--ink);border-color:var(--paper)}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:rgba(247,246,242,.82);margin-top:120px;padding:72px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand__main{font-size:20px;font-weight:800;color:#fff;letter-spacing:-.02em}
.footer-brand__sub{font-family:var(--mono);font-size:11px;letter-spacing:.22em;color:var(--volt);display:block;margin-top:4px}
.footer-brand p{margin:16px 0 0;font-size:14.5px;line-height:1.8;max-width:300px;color:rgba(247,246,242,.68)}
.footer-col h4{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:rgba(247,246,242,.5);font-family:var(--mono);font-weight:500;margin-bottom:18px}
.footer-col li{margin-bottom:12px}
.footer-col a{font-size:15px;transition:color .18s var(--ease)}
.footer-col a:hover{color:var(--volt)}
.footer-contact span{display:block;font-size:15px;margin-bottom:12px;color:rgba(247,246,242,.8)}
.footer-bottom{
  margin-top:52px;
  padding-top:24px;
  border-top:1px solid rgba(247,246,242,.14);
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(247,246,242,.55);
}
.footer-bottom strong{color:var(--volt);font-weight:600}

/* ============ 移动端转化条 ============ */
.mobile-bar{
  position:fixed;
  left:16px;right:16px;
  bottom:calc(16px + env(safe-area-inset-bottom,0px));
  display:none;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:12px 14px 12px 20px;
  background:var(--ink);
  color:var(--paper);
  border-radius:var(--r-pill);
  box-shadow:var(--shadow-dock);
  z-index:70;
  opacity:0;
  transform:translateY(24px);
  transition:opacity .28s var(--ease),transform .28s var(--ease);
}
.mobile-bar.is-visible{opacity:1;transform:none}
.mobile-bar p{margin:0;font-size:14px;color:rgba(247,246,242,.86)}
.mobile-bar .btn{padding:10px 18px;font-size:14px}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (min-width:1280px){
  .container{max-width:1280px}
}
@media (max-width:1023px){
  .hero{padding-top:132px}
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero-visual{max-width:520px}
  .hero-visual__mini{left:auto;right:-12px;bottom:-24px;width:48%}
  .hero-tag{right:8px}
  .features{grid-template-columns:1fr;gap:28px}
  .feature--dark{margin-top:0}
  .scene{grid-template-columns:1fr;gap:32px}
  .scene-left{position:static}
  .posts{grid-template-columns:repeat(2,1fr)}
  .post-card--wide{grid-column:span 2}
  .trust-stats{grid-template-columns:repeat(3,1fr)}
  .quotes{grid-template-columns:1fr;gap:26px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .dock-nav{
    display:none;
    position:fixed;
    inset:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin:0;
    padding:104px 24px 32px;
    background:rgba(247,246,242,.98);
    backdrop-filter:blur(20px);
    overflow-y:auto;
    z-index:-1;
  }
  .dock-nav.is-open{display:flex}
  .dock-link{font-size:18px;line-height:56px;padding:0 6px;border-bottom:1px solid var(--line);border-radius:0;color:var(--ink)}
  .dock-link::after{display:none}
  .dock-link.is-active{font-weight:700}
  .dock-link.is-active::before{
    content:"";
    display:inline-block;
    width:6px;height:6px;
    margin-right:10px;
    border-radius:50%;
    background:var(--volt);
    vertical-align:middle;
  }
  .dock-nav__cta{display:flex;margin-top:28px}
  .dock-nav__cta .btn{width:100%}
  .dock-toggle{display:inline-flex}
  .dock-actions .icon-btn{display:none}
  .dock-actions .btn-primary{display:none}
  .section{padding:56px 0}
}
@media (max-width:767px){
  body{padding-bottom:92px}
  .container{padding:0 20px}
  .hero{padding:120px 0 48px}
  .hero-sub{font-size:17px}
  .hero-cta .btn{flex:1 1 auto}
  .stat-row{gap:20px;margin-top:32px}
  .stat{min-width:96px;padding-left:12px}
  .stat__num{font-size:22px}
  .posts{grid-template-columns:1fr}
  .post-card--wide{grid-column:span 1}
  .trust-stats{grid-template-columns:1fr;gap:20px;padding-bottom:32px}
  .trust-stat__num{font-size:32px}
  .cta-band{padding:36px 24px}
  .cta-band__actions{width:100%}
  .cta-band__actions .btn{width:100%}
  .site-footer{margin-top:72px;padding-top:56px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .section-head{margin-bottom:28px}
  .faq-q{font-size:16.5px;padding:18px 0}
  .mobile-bar{display:flex}
  .scene-stage__cap{font-size:12.5px}
}
@media (max-width:480px){
  .brand__sub{letter-spacing:.16em}
  .hero h1{font-size:32px}
  .hero-visual__mini{position:relative;left:0;right:0;bottom:0;width:100%;margin-top:14px;transform:none}
  .hero-tag{position:static;display:inline-block;margin-top:16px}
  .mobile-bar p{font-size:13px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --paper:#F7F6F2;
  --surface:#FFFFFF;
  --ink:#14161A;
  --ink-soft:#3B4048;
  --muted:#83888F;
  --line:#E4E1D9;
  --volt:#CDF24C;
  --volt-ink:#6E8A0F;
  --spark:#FF6A2C;
  --ok:#3E9E5A;
  --warn:#D9A21B;
  --err:#D64545;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --shadow-card:0 1px 2px rgba(20,22,26,.04),0 12px 28px -16px rgba(20,22,26,.14);
  --shadow-dock:0 10px 36px -12px rgba(20,22,26,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-sans:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"IBM Plex Mono","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:76px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.section-head h2{font-size:clamp(24px,3vw,36px);line-height:1.22;font-weight:700;letter-spacing:-.01em}
.section-head p{margin-top:10px;color:var(--muted);font-size:15px;max-width:62ch}
.eyebrow{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--volt-ink);font-weight:600}

/* ============ 阅读进度 ============ */
.progress-track{position:fixed;top:0;left:0;width:100%;height:2px;background:transparent;z-index:90}
.progress-track span{display:block;height:100%;width:0;background:var(--volt);transition:width .12s linear}

/* ============ Dock 导航 ============ */
.dock-wrap{position:fixed;top:18px;left:0;right:0;z-index:80;padding:0 20px;pointer-events:none}
.dock{
  pointer-events:auto;
  position:relative;
  max-width:1080px;
  margin:0 auto;
  display:flex;
  align-items:center;
  gap:20px;
  padding:10px 12px 10px 22px;
  background:rgba(247,246,242,.74);
  -webkit-backdrop-filter:blur(16px) saturate(1.5);
  backdrop-filter:blur(16px) saturate(1.5);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  box-shadow:var(--shadow-dock);
}
.brand{display:flex;align-items:baseline;gap:7px;flex-shrink:0;padding-right:18px;border-right:1px solid var(--line)}
.brand__main{font-size:19px;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.brand__sub{font-size:11px;letter-spacing:.1em;color:var(--muted);font-weight:600}
.dock-nav{display:flex;align-items:center;gap:4px;flex:1 1 auto;min-width:0}
.dock-link{
  position:relative;
  font-size:14px;
  font-weight:500;
  color:var(--ink-soft);
  padding:9px 12px;
  border-radius:var(--r-pill);
  white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.dock-link:hover{color:var(--ink);background:rgba(20,22,26,.05)}
.dock-link.is-active{color:var(--ink);font-weight:600}
.dock-link.is-active::after{
  content:"";position:absolute;left:50%;bottom:1px;transform:translateX(-50%);
  width:4px;height:4px;border-radius:50%;background:var(--volt);
}
.dock-nav__cta{display:none}
.dock-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}
.icon-btn{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--line);border-radius:var(--r-pill);
  cursor:pointer;color:var(--ink-soft);
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.icon-btn:hover{border-color:var(--ink);color:var(--ink);background:var(--surface)}
.dock-toggle{display:none}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 26px;border-radius:var(--r-pill);
  border:1px solid transparent;background:transparent;cursor:pointer;
  white-space:nowrap;text-decoration:none;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-primary{background:var(--ink);color:var(--paper)}
.btn-primary:hover{background:var(--volt);color:var(--ink);transform:translateY(-2px)}
.btn-ghost{border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper)}
.btn-volt{background:var(--volt);color:var(--ink)}
.btn-volt:hover{background:var(--paper);color:var(--ink);transform:translateY(-2px)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn:focus-visible,.icon-btn:focus-visible,.dock-link:focus-visible,a:focus-visible,button:focus-visible{
  outline:2px solid var(--volt);outline-offset:2px;
}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--line);padding-bottom:3px;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.link-arrow svg{transition:transform .2s var(--ease)}
.link-arrow:hover{border-color:var(--volt)}
.link-arrow:hover svg{transform:translateX(4px)}

/* ============ 主区域 ============ */
.site-main{padding-top:128px}

/* 面包屑 */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:26px}
.crumbs a{color:var(--muted);transition:color .2s var(--ease)}
.crumbs a:hover{color:var(--ink)}
.crumb-sep{color:var(--line)}
.crumb-current{color:var(--ink-soft);max-width:46ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 文章头部 */
.article-head{max-width:860px}
.tag-pill{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--volt);color:var(--ink);
  font-size:12px;font-weight:700;letter-spacing:.04em;
  padding:6px 12px;border-radius:var(--r-sm);
}
.article-head h1{
  margin-top:22px;
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.16;
  font-weight:800;
  letter-spacing:-.01em;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  margin-top:24px;padding-top:20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--line)}
.article-meta .mono{color:var(--ink-soft)}

/* 主图 */
.lead-figure{margin-top:40px;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);background:#E9E7E0}
.lead-figure img{width:100%;aspect-ratio:16/8;object-fit:cover}
.lead-figure figcaption{font-size:13px;color:var(--muted);padding:12px 16px;background:var(--surface);border-top:1px solid var(--line)}

/* 双栏：正文 + 目录 */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,720px) 240px;
  gap:64px;
  justify-content:center;
  align-items:start;
  margin-top:56px;
}

/* 正文排版 */
.article-content{font-size:17px;line-height:1.9;color:var(--ink-soft);overflow-wrap:break-word}
.article-content > * + *{margin-top:1.15em}
.article-content h2{
  font-size:clamp(22px,2.6vw,28px);line-height:1.35;font-weight:700;color:var(--ink);
  margin-top:2.3em;scroll-margin-top:120px;
}
.article-content h3{font-size:20px;line-height:1.45;font-weight:600;color:var(--ink);margin-top:1.9em;scroll-margin-top:120px}
.article-content h4{font-size:17px;font-weight:600;color:var(--ink);margin-top:1.6em}
.article-content p{margin:0}
.article-content strong{color:var(--ink);font-weight:600}
.article-content a{color:var(--ink);box-shadow:inset 0 -.55em 0 var(--volt);transition:box-shadow .2s var(--ease)}
.article-content a:hover{box-shadow:inset 0 -1.1em 0 var(--volt)}
.article-content ul{padding-left:0}
.article-content ul li{position:relative;padding-left:22px;margin:.5em 0}
.article-content ul li::before{content:"";position:absolute;left:2px;top:.78em;width:7px;height:7px;border-radius:50%;background:var(--volt)}
.article-content ol{list-style:decimal;padding-left:1.4em}
.article-content ol li{margin:.5em 0}
.article-content blockquote{
  margin:1.8em 0;padding:6px 0 6px 22px;border-left:3px solid var(--volt);
  color:var(--ink);font-size:17px;
}
.article-content figure{margin:1.8em 0}
.article-content img{border-radius:var(--r-md);width:100%;height:auto;background:#E9E7E0}
.article-content figcaption{margin-top:10px;font-size:13px;color:var(--muted);text-align:center}
.article-content table{width:100%;border-collapse:collapse;font-size:15px;margin:1.6em 0}
.article-content th,.article-content td{border-bottom:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top}
.article-content th{color:var(--ink);font-weight:600;background:rgba(228,225,217,.35)}
.article-content code{font-family:var(--font-mono);font-size:.9em;background:#F1EFE9;border:1px solid var(--line);border-radius:6px;padding:.12em .4em;color:var(--ink)}
.article-content pre{background:var(--ink);color:#F2F1EC;padding:18px 20px;border-radius:var(--r-md);overflow:auto;font-size:14px;line-height:1.7}
.article-content pre code{background:none;border:0;padding:0;color:inherit}
.article-content hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}

/* 侧栏 */
.article-aside{position:sticky;top:118px;display:flex;flex-direction:column;gap:22px}
.toc{padding-left:16px;border-left:1px solid var(--line)}
.toc__title{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin-bottom:14px}
.toc__list li{margin-bottom:2px}
.toc__list a{
  display:block;font-size:14px;line-height:1.5;color:var(--muted);
  padding:6px 0 6px 12px;border-left:2px solid transparent;margin-left:-18px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.toc__list a:hover{color:var(--ink)}
.toc__list a.is-current{color:var(--ink);font-weight:600;border-left-color:var(--volt)}
.aside-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px;box-shadow:var(--shadow-card);
}
.aside-card__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin-bottom:12px}
.aside-card a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:14px;color:var(--ink-soft);padding:9px 0;border-bottom:1px solid var(--line);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.aside-card a:last-child{border-bottom:0;padding-bottom:0}
.aside-card a:hover{color:var(--ink);padding-left:4px}

/* 文末 */
.article-foot{
  margin-top:56px;padding-top:28px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;font-size:12.5px;font-weight:600;color:var(--ink-soft);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-pill);padding:7px 14px;
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.tag:hover{border-color:var(--volt);color:var(--ink);background:rgba(205,242,76,.18)}

/* 空态 */
.empty-state{
  text-align:center;padding:64px 24px;background:var(--surface);
  border:1px dashed var(--line);border-radius:var(--r-lg);
}
.empty-state h2{font-size:22px;font-weight:700;color:var(--ink);margin-top:18px}
.empty-state p{margin-top:10px;color:var(--muted);font-size:15px}
.empty-state .btn{margin-top:24px}

/* 相关推荐 */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{
  position:relative;display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.rel-card::after{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:var(--line);transition:height .22s var(--ease),background .22s var(--ease)}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card)}
.rel-card:hover::after{height:3px;background:var(--volt)}
.rel-card__media{aspect-ratio:16/9;background:#E9E7E0;overflow:hidden}
.rel-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.rel-card:hover .rel-card__media img{transform:scale(1.03)}
.rel-card__body{padding:20px 22px 24px}
.rel-card__tag{
  display:inline-flex;background:var(--volt);color:var(--ink);
  font-size:11px;font-weight:700;letter-spacing:.06em;padding:4px 9px;border-radius:var(--r-sm);
}
.rel-card h3{margin-top:14px;font-size:19px;line-height:1.45;font-weight:600;color:var(--ink)}
.rel-card p{margin-top:10px;font-size:14px;line-height:1.7;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-card__meta{margin-top:16px;padding-top:14px;border-top:1px solid var(--line);font-family:var(--font-mono);font-size:12px;color:var(--muted);display:flex;gap:12px}

/* 深色 CTA */
.cta-dark{
  background:var(--ink);color:#F2F1EC;border-radius:var(--r-lg);
  padding:56px;display:flex;align-items:center;justify-content:space-between;gap:40px;
}
.cta-dark h2{font-size:clamp(24px,3vw,34px);line-height:1.25;font-weight:700;color:#fff}
.cta-dark p{margin-top:14px;font-size:15px;color:rgba(242,241,236,.68);max-width:52ch}
.cta-dark__actions{display:flex;gap:12px;flex-shrink:0;flex-wrap:wrap}

/* 页脚 */
.site-footer{margin-top:120px;background:var(--ink);color:#F2F1EC;padding:72px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand__main{font-size:22px;font-weight:800;letter-spacing:-.02em;color:#fff}
.footer-brand__sub{display:block;margin-top:4px;font-size:11px;letter-spacing:.14em;color:var(--volt);font-weight:600}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(242,241,236,.62);max-width:34ch}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col a,.footer-contact span{display:block;font-size:14px;color:rgba(242,241,236,.66);transition:color .2s var(--ease)}
.footer-col a:hover,.footer-contact a:hover{color:var(--volt)}
.footer-contact span{margin-bottom:10px}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(242,241,236,.14);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:rgba(242,241,236,.5);
}
.footer-bottom strong{color:var(--volt);font-weight:600}

/* 移动端转化条 */
.mobile-cta{
  position:fixed;left:16px;right:16px;bottom:calc(16px + env(safe-area-inset-bottom));
  display:none;align-items:center;justify-content:space-between;gap:14px;
  background:var(--ink);color:#F2F1EC;border-radius:var(--r-pill);
  padding:10px 10px 10px 20px;box-shadow:var(--shadow-dock);z-index:85;
  opacity:0;transform:translateY(24px);transition:opacity .28s var(--ease),transform .28s var(--ease);
}
.mobile-cta.is-visible{opacity:1;transform:none}
.mobile-cta span{font-size:13.5px;line-height:1.4}

/* 显现动画 */
[data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
[data-reveal].is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .dock{max-width:1000px}
  .article-layout{gap:44px}
}
@media (max-width:1023px){
  .site-main{padding-top:116px}
  .dock{padding:10px 12px 10px 18px}
  .dock-toggle{display:inline-flex}
  .dock-actions .btn-sm{display:none}
  .dock-nav{
    position:absolute;top:calc(100% + 12px);left:0;right:0;
    display:none;flex-direction:column;align-items:stretch;gap:2px;
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
    padding:14px;box-shadow:var(--shadow-dock);
  }
  .dock-nav.is-open{display:flex}
  .dock-link{font-size:18px;line-height:56px;padding:0 16px;border-radius:var(--r-md)}
  .dock-link.is-active::after{left:16px;transform:none;bottom:16px}
  .dock-nav__cta{display:block;margin-top:10px}
  .dock-nav__cta .btn{width:100%}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0}
  .article-aside{position:static;margin-top:48px;flex-direction:row;gap:24px;align-items:flex-start}
  .toc{flex:1 1 60%}
  .aside-card{flex:1 1 40%}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
  .cta-dark{flex-direction:column;align-items:flex-start;padding:44px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:767px){
  body{padding-bottom:84px}
  .container{padding:0 18px}
  .section{padding:56px 0}
  .site-main{padding-top:108px}
  .dock-wrap{top:12px;padding:0 12px}
  .brand{padding-right:12px}
  .brand__main{font-size:17px}
  .brand__sub{display:none}
  .article-head h1{font-size:clamp(26px,7vw,34px)}
  .article-content{font-size:16px;line-height:1.85}
  .article-content h2{font-size:22px}
  .article-content h3{font-size:18px}
  .article-aside{flex-direction:column}
  .rel-grid{grid-template-columns:1fr}
  .cta-dark{padding:32px 24px;border-radius:var(--r-md)}
  .cta-dark__actions{width:100%}
  .cta-dark__actions .btn{flex:1 1 auto}
  .site-footer{margin-top:72px;padding:56px 0 24px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .mobile-cta{display:flex}
  .section-head{flex-direction:column;align-items:flex-start}
}
@media (max-width:480px){
  .article-meta{font-size:12.5px;gap:9px}
  .btn{padding:13px 22px;font-size:14px}
  .rel-card__body{padding:18px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  [data-reveal]{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --paper:#F7F6F2;
  --surface:#FFFFFF;
  --ink:#14161A;
  --ink-soft:#3B4048;
  --muted:#83888F;
  --line:#E4E1D9;
  --volt:#CDF24C;
  --volt-ink:#6E8A0F;
  --spark:#FF6A2C;
  --ok:#3E9E5A;
  --warn:#D9A21B;
  --err:#D64545;
  --placeholder:#E9E7E0;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --shadow-card:0 1px 2px rgba(20,22,26,.04),0 12px 28px -16px rgba(20,22,26,.14);
  --shadow-dock:0 10px 36px -12px rgba(20,22,26,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:system-ui,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"IBM Plex Mono","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--paper);
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3,h4{line-height:1.25;font-weight:700}
:focus-visible{outline:2px solid var(--volt);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1280px){.container{max-width:1280px}}

/* ---------- Dock 导航 ---------- */
.dock-wrap{
  position:fixed;
  top:16px;left:0;right:0;
  z-index:80;
  padding:0 16px;
  pointer-events:none;
}
.dock{
  pointer-events:auto;
  max-width:1080px;
  margin:0 auto;
  display:flex;
  align-items:center;
  gap:18px;
  padding:10px 12px 10px 22px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  background:rgba(247,246,242,.76);
  backdrop-filter:blur(16px) saturate(1.25);
  -webkit-backdrop-filter:blur(16px) saturate(1.25);
  box-shadow:var(--shadow-dock);
}
.brand{display:flex;flex-direction:column;line-height:1.05;flex-shrink:0}
.brand__main{font-size:18px;font-weight:800;letter-spacing:-.01em}
.brand__sub{font-size:11px;letter-spacing:.18em;color:var(--volt-ink);font-weight:600}
.dock-nav{display:flex;align-items:center;gap:2px;flex:1;justify-content:center}
.dock-link{
  position:relative;
  padding:10px 14px;
  font-size:15px;
  color:var(--ink-soft);
  border-radius:var(--r-pill);
  transition:color .2s var(--ease),background .2s var(--ease);
  white-space:nowrap;
}
.dock-link:hover{color:var(--ink);background:rgba(20,22,26,.05)}
.dock-link.is-active{color:var(--ink);font-weight:600}
.dock-link.is-active::after{
  content:"";
  position:absolute;
  left:50%;bottom:2px;
  width:4px;height:4px;
  margin-left:-2px;
  border-radius:50%;
  background:var(--volt);
}
.dock-nav__cta{display:none}
.dock-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;
  border:1px solid var(--line);
  border-radius:50%;
  background:var(--surface);
  color:var(--ink);
  cursor:pointer;
  transition:background .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease);
}
.icon-btn:hover{background:var(--volt);border-color:var(--volt);transform:translateY(-1px)}
.dock-toggle{display:none}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;
  border-radius:var(--r-pill);
  cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{background:var(--ink);color:var(--paper)}
.btn-primary:hover{background:var(--volt);color:var(--ink);transform:translateY(-2px)}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-2px)}
.btn-volt{background:var(--volt);color:var(--ink)}
.btn-volt:hover{background:var(--paper);transform:translateY(-2px)}
.btn-light{background:transparent;border-color:rgba(247,246,242,.45);color:var(--paper)}
.btn-light:hover{background:var(--paper);color:var(--ink);border-color:var(--paper);transform:translateY(-2px)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-text{background:none;padding:0;color:var(--ink);font-weight:600}
.btn-text .arrow{transition:transform .2s var(--ease)}
.btn-text:hover .arrow{transform:translateX(4px)}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none}

/* ---------- 主体与面包屑 ---------- */
main{padding-top:104px}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:rgba(247,246,242,.62);
  margin-bottom:22px;
}
.breadcrumb a{transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--volt)}
.breadcrumb .sep{opacity:.55}
.breadcrumb--light{color:var(--muted)}

/* ---------- 深墨 Banner ---------- */
.page-banner{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  background:var(--ink) url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  color:var(--paper);
}
.page-banner::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(20,22,26,.95) 0%,rgba(20,22,26,.88) 50%,rgba(20,22,26,.62) 100%);
}
.banner-inner{position:relative;z-index:2;padding-top:48px;padding-bottom:52px}
.banner-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);
  font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--volt);
  border:1px solid var(--volt);
  border-radius:var(--r-pill);
  padding:6px 14px;
  margin-bottom:22px;
}
.banner-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--volt);animation:pulse 1.8s var(--ease) infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.page-banner h1{
  font-size:clamp(32px,5vw,58px);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.01em;
  max-width:16em;
}
.page-banner h1 em{
  font-style:normal;
  background:linear-gradient(transparent 62%,rgba(205,242,76,.55) 62%);
  padding:0 2px;
}
.banner-sub{
  margin-top:20px;
  max-width:42em;
  font-size:17px;
  line-height:1.8;
  color:rgba(247,246,242,.78);
}
.banner-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.banner-facts{
  display:flex;flex-wrap:wrap;gap:26px;
  margin-top:38px;
  padding-top:24px;
  border-top:1px solid rgba(247,246,242,.16);
}
.banner-fact{display:flex;flex-direction:column;gap:4px}
.banner-fact b{font-family:var(--mono);font-size:26px;font-weight:600;color:var(--paper);letter-spacing:-.02em}
.banner-fact span{font-size:12px;color:rgba(247,246,242,.6);letter-spacing:.04em}

/* ---------- 板块通用 ---------- */
.section{padding-top:120px}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:18px;margin-bottom:40px;
}
.section-title{
  font-size:clamp(26px,3.2vw,40px);
  font-weight:700;
  line-height:1.2;
  letter-spacing:-.01em;
}
.section-sub{margin-top:12px;max-width:46em;color:var(--ink-soft);font-size:16px}
.eyebrow{
  display:block;
  font-family:var(--mono);
  font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--muted);
  margin-bottom:12px;
}

/* ---------- 筛选胶囊 ---------- */
.chip-row{
  margin-top:28px;
  padding:16px 18px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  box-shadow:var(--shadow-card);
  display:flex;align-items:center;gap:10px;
  overflow-x:auto;
  scrollbar-width:thin;
}
.chip{
  flex-shrink:0;
  padding:10px 20px;
  font-size:14px;font-weight:600;
  color:var(--ink-soft);
  background:transparent;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.chip:hover{border-color:var(--ink);color:var(--ink);transform:translateY(-2px)}
.chip.is-active{background:var(--ink);border-color:var(--ink);color:var(--volt)}
.chip-row .chip-note{
  margin-left:auto;flex-shrink:0;
  font-family:var(--mono);font-size:12px;color:var(--muted);
  padding-left:14px;
}

/* ---------- 比分卡片网格 ---------- */
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.live-card{
  position:relative;
  display:flex;flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.live-card::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:1px;
  background:var(--line);
  transition:height .24s var(--ease),background .24s var(--ease);
  z-index:3;
}
.live-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card);border-color:#D6D3C9}
.live-card:hover::before{height:3px;background:var(--volt)}
.live-card__media{
  position:relative;
  aspect-ratio:16/9;
  background:var(--placeholder);
  overflow:hidden;
}
.live-card__media img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .5s var(--ease);
}
.live-card:hover .live-card__media img{transform:scale(1.03)}
.live-card__date{
  position:absolute;top:12px;right:12px;
  font-family:var(--mono);font-size:12px;letter-spacing:.04em;
  padding:5px 11px;
  border-radius:var(--r-pill);
  background:rgba(20,22,26,.82);
  color:var(--paper);
  backdrop-filter:blur(6px);
}
.live-card__body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.tag{
  display:inline-flex;align-items:center;
  font-size:12px;font-weight:600;letter-spacing:.04em;
  padding:4px 10px;
  border-radius:var(--r-sm);
  background:var(--volt);
  color:var(--ink);
  align-self:flex-start;
}
.tag--outline{background:transparent;border:1px solid var(--line);color:var(--ink-soft);font-weight:500}
.live-card h3{font-size:20px;font-weight:600;line-height:1.4}
.live-card h3 a:hover{color:var(--volt-ink)}
.live-card p{font-size:14px;line-height:1.8;color:var(--ink-soft)}
.live-card__meta{
  display:flex;flex-wrap:wrap;gap:14px;
  margin-top:auto;padding-top:16px;
  border-top:1px solid var(--line);
  font-family:var(--mono);font-size:12px;color:var(--muted);
}
.live-card__meta .state{color:var(--spark);font-weight:600}
.live-card__meta .live{color:var(--volt-ink);font-weight:600}

/* ---------- 数据带 ---------- */
.stat-band{padding-top:120px}
.stat-band__inner{
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:44px 0;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
}
.stat{display:flex;flex-direction:column;gap:6px}
.stat__num{
  font-family:var(--mono);
  font-size:clamp(30px,3.4vw,42px);
  font-weight:600;
  letter-spacing:-.02em;
  line-height:1.1;
}
.stat__num small{font-size:14px;font-weight:500;color:var(--muted);margin-left:4px}
.stat__label{font-size:13px;color:var(--muted);line-height:1.6}

/* ---------- 观看流程 ---------- */
.how-grid{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:56px;
  align-items:start;
}
.how-aside{position:sticky;top:120px}
.how-aside .section-sub{margin-top:16px}
.how-list{border-top:1px solid var(--line)}
.how-item{
  display:grid;
  grid-template-columns:64px 1fr;
  gap:20px;
  padding:26px 0;
  border-bottom:1px solid var(--line);
  transition:padding-left .24s var(--ease);
}
.how-item:hover{padding-left:6px}
.how-item__num{
  font-family:var(--mono);
  font-size:22px;font-weight:600;
  color:var(--muted);
  transition:color .24s var(--ease),transform .24s var(--ease);
}
.how-item:hover .how-item__num{color:var(--volt-ink);transform:translateX(4px)}
.how-item h3{font-size:20px;font-weight:600;margin-bottom:8px}
.how-item p{font-size:15px;line-height:1.8;color:var(--ink-soft)}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 0;
  background:none;border:0;
  font-size:18px;font-weight:600;color:var(--ink);
  text-align:left;
  cursor:pointer;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--volt-ink)}
.faq-icon{
  position:relative;flex-shrink:0;
  width:22px;height:22px;
  border-radius:50%;
  border:1px solid var(--line);
  transition:transform .24s var(--ease),background .24s var(--ease),border-color .24s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--ink);
  transition:background .24s var(--ease),opacity .24s var(--ease);
}
.faq-icon::before{left:50%;top:6px;width:1.5px;height:8px;margin-left:-.75px}
.faq-icon::after{top:50%;left:6px;height:1.5px;width:8px;margin-top:-.75px}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:var(--volt);border-color:var(--volt)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .3s var(--ease);
}
.faq-a p{
  padding:0 0 26px 18px;
  border-left:2px solid var(--volt);
  font-size:15px;line-height:1.8;
  color:var(--ink-soft);
}
.faq-item.is-open .faq-a{max-height:360px}

/* ---------- 加载更多 ---------- */
.pager{
  margin-top:48px;
  display:flex;flex-direction:column;align-items:center;gap:14px;
}
.pager__note{font-size:13px;color:var(--muted);font-family:var(--mono)}
.pager__track{
  width:min(320px,100%);height:3px;border-radius:var(--r-pill);
  background:var(--line);overflow:hidden;
}
.pager__track span{display:block;height:100%;width:62%;background:var(--volt)}

/* ---------- CTA 区块 ---------- */
.cta-block{padding-top:120px}
.cta-card{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
  padding:40px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);
  position:relative;
  overflow:hidden;
}
.cta-card::before{
  content:"";
  position:absolute;left:0;top:0;bottom:0;width:4px;
  background:var(--volt);
}
.cta-card h2{font-size:clamp(24px,2.8vw,34px);line-height:1.25}
.cta-card p{margin-top:12px;max-width:38em;color:var(--ink-soft);font-size:15px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:120px;
  background:var(--ink);
  color:var(--paper);
  padding:72px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand__main{display:block;font-size:20px;font-weight:800;letter-spacing:-.01em}
.footer-brand__sub{display:block;font-size:11px;letter-spacing:.2em;color:var(--volt);margin-top:4px;font-weight:600}
.footer-brand p{margin-top:18px;font-size:14px;line-height:1.8;color:rgba(247,246,242,.66);max-width:26em}
.footer-col h4{font-size:14px;font-weight:600;letter-spacing:.06em;margin-bottom:18px;color:var(--paper)}
.footer-col ul li{margin-bottom:12px}
.footer-col a,.footer-contact span{
  display:block;
  font-size:14px;
  color:rgba(247,246,242,.7);
  transition:color .2s var(--ease);
}
.footer-col a:hover{color:var(--volt)}
.footer-contact span{margin-bottom:12px;line-height:1.6}
.footer-bottom{
  margin-top:52px;padding-top:22px;
  border-top:1px solid rgba(247,246,242,.14);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(247,246,242,.55);
}
.footer-bottom strong{color:var(--paper)}

/* ---------- 移动端固定转化条 ---------- */
.mobile-bar{
  position:fixed;
  left:16px;right:16px;
  bottom:calc(16px + env(safe-area-inset-bottom,0px));
  z-index:90;
  display:none;align-items:center;justify-content:space-between;gap:14px;
  padding:12px 12px 12px 20px;
  background:var(--ink);
  color:var(--paper);
  border-radius:var(--r-pill);
  box-shadow:var(--shadow-dock);
  transform:translateY(24px);
  opacity:0;
  pointer-events:none;
  transition:transform .28s var(--ease),opacity .28s var(--ease);
}
.mobile-bar.is-show{transform:none;opacity:1;pointer-events:auto}
.mobile-bar span{font-size:14px}
.mobile-bar .btn{padding:10px 20px;font-size:14px}

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

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:1100px}
}
@media (max-width:1100px){
  .dock{gap:12px;padding:10px 12px 10px 18px}
  .dock-link{padding:10px 10px;font-size:14px}
  .how-grid{gap:36px}
}
@media (max-width:980px){
  main{padding-top:96px}
  .dock{border-radius:var(--r-lg)}
  .dock-nav{
    position:fixed;
    top:92px;left:16px;right:16px;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    padding:12px;
    max-height:70vh;
    overflow:auto;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    box-shadow:var(--shadow-dock);
  }
  .dock-nav.is-open{display:flex}
  .dock-link{
    height:56px;
    display:flex;align-items:center;
    padding:0 18px;
    font-size:18px;
    border-radius:var(--r-md);
  }
  .dock-link:hover{background:rgba(20,22,26,.05)}
  .dock-link.is-active{background:rgba(205,242,76,.34)}
  .dock-link.is-active::after{display:none}
  .dock-nav__cta{display:block;margin-top:8px}
  .dock-nav__cta .btn{width:100%;height:52px}
  .dock-toggle{display:inline-flex}
  .dock-actions .btn-sm{display:none}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stat-band__inner{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .how-grid{grid-template-columns:1fr}
  .how-aside{position:static}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:767px){
  body{padding-bottom:96px}
  .container{padding:0 18px}
  .section{padding-top:64px}
  .stat-band{padding-top:64px}
  .cta-block{padding-top:64px}
  .page-banner h1{font-size:clamp(28px,7.4vw,36px)}
  .banner-inner{padding-top:36px;padding-bottom:40px}
  .banner-actions{flex-direction:column;align-items:stretch}
  .banner-actions .btn{width:100%}
  .card-grid{grid-template-columns:1fr;gap:20px}
  .banner-facts{gap:20px}
  .banner-fact b{font-size:22px}
  .chip-row{border-radius:var(--r-lg);padding:14px}
  .chip-row .chip-note{display:none}
  .how-item{grid-template-columns:44px 1fr;gap:14px}
  .faq-q{font-size:16px;padding:20px 0}
  .cta-card{padding:28px 24px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .site-footer{margin-top:72px;padding-top:52px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;gap:8px}
  .mobile-bar{display:flex}
}
@media (max-width:480px){
  .brand__main{font-size:16px}
  .stat-band__inner{grid-template-columns:1fr;gap:24px}
  .live-card__body{padding:20px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.01ms !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --paper:#F7F6F2;
  --surface:#FFFFFF;
  --ink:#14161A;
  --ink-soft:#3B4048;
  --muted:#83888F;
  --line:#E4E1D9;
  --volt:#CDF24C;
  --volt-ink:#6E8A0F;
  --spark:#FF6A2C;
  --ok:#3E9E5A;
  --warn:#D9A21B;
  --err:#D64545;
  --ph:#E9E7E0;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --shadow-card:0 1px 2px rgba(20,22,26,.04),0 12px 28px -16px rgba(20,22,26,.14);
  --shadow-dock:0 10px 36px -12px rgba(20,22,26,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
  --mono:ui-monospace,"IBM Plex Mono","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;background:var(--ph)}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
strong{font-weight:700}
:focus-visible{outline:2px solid var(--volt);outline-offset:2px;border-radius:6px}
::selection{background:var(--volt);color:var(--ink)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1280px){.container{max-width:1280px}}

/* ============ 浮动 Dock 导航 ============ */
.dock-wrap{
  position:fixed;top:18px;left:0;right:0;z-index:120;
  padding:0 16px;display:flex;justify-content:center;pointer-events:none;
}
.dock{
  pointer-events:auto;
  width:100%;max-width:1080px;
  display:flex;align-items:center;gap:18px;
  padding:10px 12px 10px 20px;
  border-radius:var(--r-pill);
  background:rgba(247,246,242,.78);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line);
  box-shadow:var(--shadow-dock);
}
.brand{display:flex;flex-direction:column;line-height:1.05;flex:0 0 auto}
.brand__main{font-size:19px;font-weight:800;letter-spacing:-.02em}
.brand__sub{font-size:10px;letter-spacing:.24em;color:var(--muted);margin-top:3px}
.dock-nav{display:flex;align-items:center;gap:2px;flex:1 1 auto;justify-content:center}
.dock-link{
  position:relative;display:inline-flex;align-items:center;
  padding:9px 13px;border-radius:var(--r-pill);
  font-size:14px;color:var(--ink-soft);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.dock-link:hover{color:var(--ink);background:rgba(20,22,26,.05)}
.dock-link.is-active{color:var(--ink);font-weight:600}
.dock-link.is-active::after{
  content:"";position:absolute;left:50%;bottom:2px;
  width:4px;height:4px;border-radius:50%;background:var(--volt);
  transform:translateX(-50%);
}
.dock-nav__cta{display:none}
.dock-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.icon-btn{
  width:40px;height:40px;min-width:40px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--r-pill);border:1px solid var(--line);
  color:var(--ink-soft);background:rgba(255,255,255,.6);
  transition:all .2s var(--ease);
}
.icon-btn:hover{color:var(--ink);border-color:var(--ink);background:#fff}
.dock-toggle{display:none}

/* ============ 按钮体系 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:14px 28px;
  border-radius:var(--r-pill);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease);
}
.btn-sm{min-height:40px;padding:10px 18px;font-size:14px}
.btn-primary{background:var(--ink);color:var(--paper)}
.btn-primary:hover{background:var(--volt);color:var(--ink);transform:translateY(-2px)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-2px)}
.btn-volt{background:var(--volt);color:var(--ink)}
.btn-volt:hover{background:var(--paper);color:var(--ink);transform:translateY(-2px)}
.btn-outline-light{border-color:rgba(247,246,242,.38);color:var(--paper);background:transparent}
.btn-outline-light:hover{border-color:var(--volt);color:var(--volt);transform:translateY(-2px)}
.btn[disabled]{opacity:.4;cursor:not-allowed}
.arrow{display:inline-block;transition:transform .22s var(--ease)}
.btn:hover .arrow,
.link-more:hover .arrow{transform:translateX(4px)}

.link-more{
  position:relative;display:inline-flex;align-items:center;gap:7px;
  font-size:15px;font-weight:600;color:var(--ink);
}
.link-more::after{
  content:"";position:absolute;left:0;bottom:-4px;width:100%;height:2px;
  background:var(--ink);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.link-more:hover::after{transform:scaleX(1)}

/* ============ 通用板块 ============ */
.section{padding:120px 0}
.section--tight{padding:88px 0}
.page{padding-top:112px}
.eyebrow{
  font-family:var(--mono);font-size:12px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--volt-ink);font-weight:600;
}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:56px}
.section-head h2{font-size:clamp(26px,3.2vw,40px);font-weight:700;line-height:1.2;letter-spacing:-.01em;margin-top:14px}
.section-head p{color:var(--ink-soft);font-size:16px;max-width:640px;margin-top:14px}
.section-head__side{flex:0 0 auto;padding-bottom:6px}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:170px 0 96px}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(115deg,rgba(20,22,26,.045) 0 1px,transparent 1px 36px),
    repeating-linear-gradient(25deg,rgba(20,22,26,.035) 0 1px,transparent 1px 46px);
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.35fr 1fr;gap:64px;align-items:center}
.hero-tag{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink-soft);
}
.hero-tag::before{content:"";width:26px;height:1px;background:var(--volt-ink)}
.hero h1{
  margin-top:22px;
  font-size:clamp(40px,6vw,74px);
  font-weight:800;line-height:1.08;letter-spacing:-.01em;
  max-width:14em;
}
.hero h1 .mark{
  background:linear-gradient(transparent 64%,var(--volt) 64%,var(--volt) 96%,transparent 96%);
  padding:0 2px;
}
.hero-sub{margin-top:22px;font-size:19px;line-height:1.75;color:var(--ink-soft);max-width:34em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:0;margin-top:56px;border-top:1px solid var(--line);padding-top:24px;
}
.hero-stat{padding-right:18px;border-right:1px solid var(--line)}
.hero-stat:last-child{border-right:0}
.hero-stat b{display:block;font-family:var(--mono);font-size:26px;font-weight:700;letter-spacing:-.01em}
.hero-stat span{display:block;font-size:13px;color:var(--muted);margin-top:4px}
.hero-collage{position:relative;padding-bottom:56px}
.hero-collage__main{
  border-radius:var(--r-lg);overflow:hidden;background:var(--ph);
  box-shadow:var(--shadow-card);
}
.hero-collage__main img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-collage__sub{
  position:absolute;left:-28px;bottom:0;width:52%;
  border-radius:var(--r-lg);overflow:hidden;background:var(--ph);
  border:6px solid var(--paper);
  transform:rotate(-1deg);
  box-shadow:var(--shadow-card);
}
.hero-collage__sub img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-badge{
  position:absolute;right:8px;top:-14px;
  display:inline-flex;align-items:center;gap:8px;
  background:var(--ink);color:var(--paper);
  border-radius:var(--r-pill);padding:8px 16px;
  font-family:var(--mono);font-size:12px;letter-spacing:.06em;
}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:var(--volt);display:inline-block}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;flex-wrap:wrap;gap:6px;align-items:center;
  font-size:13px;color:var(--muted);padding:28px 0 0;
}
.breadcrumb a{transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--ink)}
.breadcrumb em{font-style:normal;color:var(--ink-soft)}

/* ============ 数据带 ============ */
.band{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-card);
}
.band-item{padding:32px 28px;border-right:1px solid var(--line);transition:box-shadow .24s var(--ease)}
.band-item:last-child{border-right:0}
.band-item:hover{box-shadow:inset 0 3px 0 var(--volt)}
.band-num{display:block;font-family:var(--mono);font-size:34px;font-weight:700;letter-spacing:-.02em}
.band-num i{font-style:normal;font-size:16px;color:var(--volt-ink);margin-left:2px}
.band-label{display:block;font-size:15px;font-weight:600;margin-top:8px}
.band-item p{font-size:13.5px;color:var(--muted);margin-top:8px;line-height:1.7}

/* ============ 双列大图卡（交替） ============ */
.feature-list{display:flex;flex-direction:column}
.feature-row{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:56px 0;border-top:1px solid var(--line);
}
.feature-row:last-child{border-bottom:1px solid var(--line)}
.feature-media{
  border-radius:var(--r-lg);overflow:hidden;background:var(--ph);
  box-shadow:var(--shadow-card);
}
.feature-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  transition:transform .45s var(--ease);
}
.feature-media:hover img{transform:scale(1.03)}
.feature-index{
  font-family:var(--mono);font-size:13px;letter-spacing:.16em;
  color:var(--volt-ink);font-weight:600;display:block;
}
.feature-body h3{font-size:22px;font-weight:600;line-height:1.4;margin-top:14px}
.feature-body > p{font-size:16px;color:var(--ink-soft);margin-top:14px;line-height:1.8}
.feature-points{margin-top:20px;display:flex;flex-direction:column;gap:10px}
.feature-points li{
  position:relative;padding-left:20px;font-size:14.5px;color:var(--ink-soft);
}
.feature-points li::before{
  content:"";position:absolute;left:0;top:.62em;
  width:8px;height:8px;border-radius:50%;background:var(--volt);
}
.feature-body .link-more{margin-top:24px}
.feature-list .feature-row:nth-child(even) .feature-media{order:2}

/* ============ 阅读流程 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.step{
  position:relative;padding:28px 24px 26px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.step::before{
  content:"";position:absolute;left:0;top:0;height:1px;width:100%;
  background:var(--line);transition:height .24s var(--ease),background .24s var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-card)}
.step:hover::before{height:3px;background:var(--volt)}
.step b{
  font-family:var(--mono);font-size:13px;letter-spacing:.16em;
  color:var(--volt-ink);display:block;
}
.step h3{font-size:18px;font-weight:600;margin-top:12px}
.step p{font-size:14.5px;color:var(--ink-soft);margin-top:10px;line-height:1.75}

/* ============ 用法场景（不等高） ============ */
.usecase{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;align-items:start}
.usecase-item{padding-top:26px;border-top:1px solid var(--line);transition:border-color .24s var(--ease)}
.usecase-item:hover{border-top-color:var(--volt)}
.usecase-item:nth-child(1){padding-top:26px}
.usecase-item:nth-child(2){margin-top:44px}
.usecase-item:nth-child(3){margin-top:18px}
.usecase-item b{font-family:var(--mono);font-size:13px;letter-spacing:.16em;color:var(--muted)}
.usecase-item h3{font-size:20px;font-weight:600;margin-top:12px}
.usecase-item p{font-size:15px;color:var(--ink-soft);margin-top:12px;line-height:1.8}
.usecase-item ul{margin-top:16px;display:flex;flex-direction:column;gap:8px}
.usecase-item li{font-size:13.5px;color:var(--muted);padding-left:16px;position:relative}
.usecase-item li::before{content:"—";position:absolute;left:0;color:var(--volt-ink)}

/* ============ FAQ ============ */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:26px 0;text-align:left;font-size:18px;font-weight:600;line-height:1.5;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--volt-ink)}
.faq-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;
  border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;
  font-size:16px;line-height:1;color:var(--ink-soft);
  transition:transform .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease);
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);color:var(--ink);border-color:var(--volt);background:var(--volt)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .3s var(--ease);
}
.faq-item.is-open .faq-a{max-height:420px}
.faq-a p{
  border-left:2px solid var(--volt);
  padding:0 0 4px 18px;margin:0 0 26px;
  font-size:15px;line-height:1.8;color:var(--ink-soft);
}

/* ============ CTA ============ */
.cta-block{
  position:relative;overflow:hidden;
  background:var(--ink);border-radius:var(--r-lg);
  padding:56px;display:grid;grid-template-columns:1.5fr 1fr;gap:36px;align-items:center;
}
.cta-block::after{
  content:"";position:absolute;right:-70px;top:-70px;width:240px;height:240px;
  border:1px solid rgba(205,242,76,.32);border-radius:50%;
}
.cta-block .eyebrow{color:var(--volt)}
.cta-block h2{
  color:var(--paper);font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.25;margin-top:14px;
}
.cta-block p{color:rgba(247,246,242,.68);font-size:15px;margin-top:14px;max-width:38em;line-height:1.8}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;position:relative;z-index:1}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink);color:rgba(247,246,242,.72);
  margin-top:120px;padding:84px 0 36px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:48px}
.footer-brand__main{display:block;color:var(--paper);font-size:22px;font-weight:800;letter-spacing:-.02em}
.footer-brand__sub{display:block;font-size:11px;letter-spacing:.24em;color:var(--volt);margin-top:4px}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;max-width:290px}
.footer-col h4{color:var(--paper);font-size:15px;font-weight:600;margin-bottom:18px}
.footer-col ul li{margin-bottom:11px}
.footer-col a{font-size:14px;color:rgba(247,246,242,.72);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--volt)}
.footer-contact span{display:block;font-size:14px;margin-bottom:11px;color:rgba(247,246,242,.72)}
.footer-bottom{
  margin-top:56px;padding-top:24px;border-top:1px solid rgba(247,246,242,.14);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13px;
}
.footer-bottom strong{color:var(--paper)}

/* ============ 移动端固定转化条 ============ */
.mobile-cta{
  position:fixed;left:16px;right:16px;bottom:calc(16px + env(safe-area-inset-bottom,0px));
  z-index:110;display:none;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 12px 10px 18px;border-radius:var(--r-pill);
  background:rgba(247,246,242,.92);backdrop-filter:blur(14px);
  border:1px solid var(--line);box-shadow:var(--shadow-dock);
  transform:translateY(24px);opacity:0;pointer-events:none;
  transition:transform .3s var(--ease),opacity .3s var(--ease);
}
.mobile-cta.is-show{transform:none;opacity:1;pointer-events:auto}
.mobile-cta span{font-size:14px;color:var(--ink-soft)}

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

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .hero-grid{gap:48px}
}
@media (max-width:1023px){
  .dock{padding:10px 12px 10px 18px;gap:12px}
  .dock-toggle{display:inline-flex}
  .dock-actions .icon-btn:not(.dock-toggle){display:none}
  .dock-nav{
    position:fixed;left:16px;right:16px;top:92px;
    flex-direction:column;align-items:stretch;gap:2px;
    background:var(--paper);border:1px solid var(--line);
    border-radius:var(--r-lg);padding:12px;
    box-shadow:var(--shadow-dock);
    display:none;
  }
  .dock-nav.is-open{display:flex}
  .dock-link{padding:14px 16px;font-size:18px;line-height:28px;border-radius:var(--r-md);min-height:56px}
  .dock-link.is-active{background:rgba(205,242,76,.22)}
  .dock-link.is-active::after{left:16px;transform:none;bottom:22px}
  .dock-nav__cta{display:block;margin-top:8px}
  .dock-nav__cta .btn{width:100%}
  .hero{padding:140px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero-collage{padding-bottom:0;max-width:620px}
  .hero-collage__sub{position:static;width:100%;margin-top:16px;transform:none;border-width:0}
  .section{padding:88px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:40px}
  .band{grid-template-columns:repeat(2,1fr)}
  .band-item:nth-child(2){border-right:0}
  .band-item:nth-child(1),.band-item:nth-child(2){border-bottom:1px solid var(--line)}
  .feature-row{grid-template-columns:1fr;gap:28px;padding:40px 0}
  .feature-list .feature-row:nth-child(even) .feature-media{order:0}
  .steps{grid-template-columns:repeat(2,1fr)}
  .usecase{grid-template-columns:1fr;gap:28px}
  .usecase-item:nth-child(2),.usecase-item:nth-child(3){margin-top:0}
  .cta-block{grid-template-columns:1fr;padding:44px 32px}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:36px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  body{padding-bottom:88px}
  .mobile-cta{display:flex}
  .hero{padding:124px 0 56px}
  .hero h1{font-size:clamp(34px,9vw,46px)}
  .hero-sub{font-size:17px}
  .hero-actions .btn{flex:1 1 auto}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:20px 0}
  .hero-stat:nth-child(2){border-right:0}
  .hero-stat:nth-child(4){border-right:0}
  .section{padding:64px 0}
  .band{grid-template-columns:1fr}
  .band-item{border-right:0;border-bottom:1px solid var(--line);padding:26px 22px}
  .band-item:last-child{border-bottom:0}
  .steps{grid-template-columns:1fr}
  .faq-q{font-size:16.5px;padding:22px 0;gap:16px}
  .cta-block{padding:36px 24px}
  .cta-actions{flex-direction:column;align-items:stretch}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .site-footer{padding:64px 0 28px;margin-top:72px}
  .footer-bottom{flex-direction:column;font-size:12.5px}
}
@media (max-width:480px){
  .brand__main{font-size:17px}
  .dock-actions .btn-sm{padding:10px 14px;font-size:13px}
  .hero-stat b{font-size:22px}
  .feature-body h3{font-size:20px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
  --paper:#F7F6F2;
  --surface:#FFFFFF;
  --ink:#14161A;
  --ink-soft:#3B4048;
  --muted:#83888F;
  --line:#E4E1D9;
  --volt:#CDF24C;
  --volt-ink:#6E8A0F;
  --spark:#FF6A2C;
  --ok:#3E9E5A;
  --warn:#D9A21B;
  --err:#D64545;
  --fill:#E9E7E0;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --shadow-sm:0 1px 2px rgba(20,22,26,.04),0 12px 28px -16px rgba(20,22,26,.14);
  --shadow-dock:0 10px 36px -12px rgba(20,22,26,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-sans:system-ui,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"IBM Plex 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);background:var(--paper);color:var(--ink);
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.22}
p{margin:0}
dl,dd,dt{margin:0}
:focus-visible{outline:2px solid var(--volt);outline-offset:2px;border-radius:6px}
::selection{background:var(--volt);color:var(--ink)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:112px 0}
.section--tight{padding:80px 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:44px}
.section-head h2{font-size:clamp(26px,3.2vw,40px);font-weight:700;max-width:760px}
.section-head p{color:var(--muted);font-size:15px;max-width:520px;margin-top:10px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--volt-ink);font-weight:600;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--volt);display:block}

/* Dock */
.dock-wrap{position:fixed;top:0;left:0;right:0;z-index:90;padding:16px 20px;pointer-events:none}
.dock{
  pointer-events:auto;max-width:1080px;margin:0 auto;display:flex;align-items:center;gap:14px;
  padding:10px 14px 10px 22px;border-radius:var(--r-pill);
  background:rgba(247,246,242,.75);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line);box-shadow:var(--shadow-dock);
}
.brand{display:flex;flex-direction:column;line-height:1.05;flex:0 0 auto}
.brand__main{font-size:17px;font-weight:800;letter-spacing:-.01em}
.brand__sub{font-size:11px;letter-spacing:.18em;color:var(--muted);font-weight:600}
.dock-nav{display:flex;align-items:center;gap:2px;flex:1 1 auto;justify-content:center}
.dock-link{
  position:relative;padding:9px 12px;border-radius:var(--r-pill);font-size:14px;color:var(--ink-soft);
  transition:color .2s var(--ease),background .2s var(--ease);white-space:nowrap;
}
.dock-link:hover{color:var(--ink);background:rgba(20,22,26,.05)}
.dock-link.is-active{color:var(--ink);font-weight:600}
.dock-link.is-active::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:2px;
  width:4px;height:4px;border-radius:50%;background:var(--volt);
}
.dock-nav__cta{display:none}
.dock-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.icon-btn{
  width:40px;height:40px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--surface);color:var(--ink-soft);
  transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.icon-btn:hover{color:var(--ink);border-color:var(--ink);transform:translateY(-1px)}
.dock-toggle{display:none}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;gap:8px;border-radius:var(--r-pill);
  padding:14px 28px;font-size:15px;font-weight:600;line-height:1;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease),border-color .22s var(--ease);
  border:1px solid transparent;
}
.btn-primary{background:var(--ink);color:var(--paper)}
.btn-primary:hover{background:var(--volt);color:var(--ink);transform:translateY(-2px)}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-2px)}
.btn-sm{padding:10px 18px;font-size:13.5px}
.btn .arrow{transition:transform .22s var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none}

/* Breadcrumb */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:13px;color:var(--muted)}
.crumb a{transition:color .2s var(--ease)}
.crumb a:hover{color:var(--ink)}
.crumb .sep{color:var(--line)}
.crumb strong{color:var(--ink-soft);font-weight:500}

/* Hero */
.hero{position:relative;padding:150px 0 88px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(115deg,rgba(20,22,26,.035) 0 1px,transparent 1px 26px);
  opacity:.9;
}
.hero .container{position:relative;z-index:1}
.hero__grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;margin-top:32px}
.hero h1{font-size:clamp(34px,4.4vw,60px);font-weight:800;line-height:1.1;letter-spacing:-.01em;margin-top:18px}
.hero h1 em{font-style:normal;position:relative;white-space:nowrap}
.hero h1 em::after{content:"";position:absolute;left:0;right:0;bottom:.06em;height:8px;background:var(--volt);z-index:-1;border-radius:2px}
.hero__lead{margin-top:22px;font-size:18px;line-height:1.8;color:var(--ink-soft);max-width:560px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero__stats{display:flex;flex-wrap:wrap;gap:0;margin-top:46px;border-top:1px solid var(--line);padding-top:26px}
.hero__stats div{padding-right:28px;margin-right:28px;border-right:1px solid var(--line)}
.hero__stats div:last-child{border-right:none;padding-right:0;margin-right:0}
.hero__stats dt{font-family:var(--font-mono);font-size:24px;font-weight:700;letter-spacing:-.02em}
.hero__stats dd{font-size:13px;color:var(--muted);margin-top:4px}
.hero__media{position:relative;padding-bottom:34px}
.hero__img-main{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);
  background:var(--fill);box-shadow:var(--shadow-sm);
}
.hero__img-sub{
  position:absolute;right:-6px;bottom:0;width:44%;aspect-ratio:1/1;object-fit:cover;
  border-radius:var(--r-lg);border:6px solid var(--paper);background:var(--fill);
  transform:rotate(-1deg);box-shadow:var(--shadow-sm);
}

/* Chips */
.chip-row{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  padding:9px 18px;border-radius:var(--r-pill);border:1px solid var(--line);background:var(--surface);
  font-size:14px;color:var(--ink-soft);min-height:44px;display:inline-flex;align-items:center;
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.chip:hover{border-color:var(--ink);color:var(--ink)}
.chip.is-active{background:var(--ink);color:var(--paper);border-color:var(--ink)}

/* Filter bar */
.filter-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.filter-bar__note{font-size:13px;color:var(--muted);font-family:var(--font-mono);letter-spacing:.04em}

/* Row list */
.row-list{margin-top:8px}
.row-item{
  display:grid;grid-template-columns:56px 120px minmax(0,1fr) 44px;gap:24px;align-items:center;
  padding:26px 12px 26px 0;border-bottom:1px solid var(--line);
  transition:background .22s var(--ease),padding-left .22s var(--ease);
}
.row-item:hover{background:rgba(205,242,76,.14);padding-left:12px}
.row-index{font-family:var(--font-mono);font-size:20px;font-weight:700;color:var(--muted);letter-spacing:-.02em}
.row-item:hover .row-index{color:var(--volt-ink)}
.row-thumb{
  display:block;width:120px;aspect-ratio:4/3;border-radius:var(--r-md);overflow:hidden;background:var(--fill);
}
.row-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.row-item:hover .row-thumb img{transform:scale(1.04)}
.row-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px}
.tag{
  display:inline-flex;align-items:center;padding:3px 10px;border-radius:var(--r-sm);
  background:var(--volt);color:var(--ink);font-size:12px;font-weight:600;letter-spacing:.02em;
}
.tag-ghost{background:transparent;border:1px solid var(--line);color:var(--muted);font-weight:500}
.row-body h3{font-size:20px;font-weight:600}
.row-body h3 a{transition:color .2s var(--ease)}
.row-item:hover .row-body h3 a{color:var(--volt-ink)}
.row-body p{margin-top:8px;font-size:15px;color:var(--ink-soft);line-height:1.7;max-width:720px}
.row-meta{display:flex;flex-wrap:wrap;gap:16px;margin-top:12px;font-family:var(--font-mono);font-size:12.5px;color:var(--muted);letter-spacing:.02em}
.row-meta span{position:relative;padding-left:12px}
.row-meta span::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:4px;border-radius:50%;background:var(--line)}
.row-go{
  width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:var(--surface);
  display:inline-flex;align-items:center;justify-content:center;color:var(--ink-soft);
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.row-item:hover .row-go{background:var(--ink);color:var(--volt);border-color:var(--ink)}
.row-item:hover .row-go svg{transform:translateX(3px)}
.row-go svg{transition:transform .22s var(--ease)}

/* Pagination */
.pager{display:flex;justify-content:center;align-items:center;gap:10px;margin-top:52px}
.pager a,.pager span{
  min-width:44px;height:44px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--surface);font-size:14px;color:var(--ink-soft);
  font-family:var(--font-mono);transition:border-color .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.pager a:hover{border-color:var(--ink);color:var(--ink)}
.pager .is-current{background:var(--ink);color:var(--volt);border-color:var(--ink)}
.pager-note{margin-top:16px;text-align:center;font-size:13px;color:var(--muted)}

/* Flow */
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}
.flow-item{padding:32px 26px 8px 0;border-right:1px solid var(--line);position:relative}
.flow-item:last-child{border-right:none}
.flow-item::before{
  content:"";position:absolute;top:-1px;left:0;width:0;height:3px;background:var(--volt);
  transition:width .3s var(--ease);
}
.flow-item:hover::before{width:100%}
.flow-num{font-family:var(--font-mono);font-size:13px;letter-spacing:.14em;color:var(--muted);font-weight:600}
.flow-item h3{margin-top:14px;font-size:20px;font-weight:600}
.flow-item p{margin-top:12px;font-size:15px;color:var(--ink-soft);line-height:1.75}

/* Rhythm / scenes */
.rhythm{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;align-items:start}
.rhythm-card{
  border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);
  padding:28px 26px;transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.rhythm-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm);border-color:#D6D2C6}
.rhythm-card .num{display:block;font-family:var(--font-mono);font-size:13px;letter-spacing:.14em;color:var(--muted)}
.rhythm-card h3{margin-top:16px;font-size:22px;font-weight:600}
.rhythm-card p{margin-top:12px;font-size:15px;color:var(--ink-soft);line-height:1.78}
.rhythm-card ul{margin-top:16px;display:grid;gap:8px}
.rhythm-card li{font-size:14px;color:var(--ink-soft);padding-left:16px;position:relative}
.rhythm-card li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:2px;background:var(--volt)}
.rhythm-card--dark{background:var(--ink);color:var(--paper);border-color:var(--ink);margin-top:44px}
.rhythm-card--dark p,.rhythm-card--dark li{color:rgba(247,246,242,.76)}
.rhythm-card--dark .num{color:var(--volt)}

/* Metrics band */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);
  padding:40px 36px;box-shadow:var(--shadow-sm);
}
.metric dt{font-family:var(--font-mono);font-size:clamp(28px,3vw,40px);font-weight:700;letter-spacing:-.02em}
.metric dd{margin-top:8px;font-size:13.5px;color:var(--muted);line-height:1.6}

/* Feature split */
.split{display:grid;grid-template-columns:5fr 7fr;gap:52px;align-items:center}
.split__media{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);background:var(--fill);
}
.split__media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.split__note{margin-top:12px;font-size:12.5px;color:var(--muted);font-family:var(--font-mono)}
.check-list{margin-top:22px;display:grid;gap:14px}
.check-list li{display:grid;grid-template-columns:22px 1fr;gap:12px;font-size:15.5px;color:var(--ink-soft);line-height:1.75}
.check-list .mk{width:22px;height:22px;border-radius:50%;background:var(--volt);display:inline-flex;align-items:center;justify-content:center;margin-top:4px}
.check-list .mk svg{width:12px;height:12px;stroke:var(--ink)}

/* FAQ */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;text-align:left;
  padding:24px 0;font-size:18px;font-weight:600;line-height:1.5;min-height:44px;
}
.faq-q:hover{color:var(--volt-ink)}
.faq-ico{
  flex:0 0 auto;width:26px;height:26px;position:relative;transition:transform .26s var(--ease);
}
.faq-ico::before,.faq-ico::after{
  content:"";position:absolute;background:var(--ink);transition:background .26s var(--ease);
}
.faq-ico::before{left:0;right:0;top:50%;height:2px;transform:translateY(-50%)}
.faq-ico::after{top:0;bottom:0;left:50%;width:2px;transform:translateX(-50%)}
.faq-item.is-open .faq-ico{transform:rotate(45deg)}
.faq-item.is-open .faq-ico::before,.faq-item.is-open .faq-ico::after{background:var(--volt-ink)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s var(--ease)}
.faq-item.is-open .faq-a{grid-template-rows:1fr}
.faq-a>div{overflow:hidden}
.faq-a p{
  font-size:15px;line-height:1.8;color:var(--ink-soft);
  border-left:2px solid var(--volt);padding:0 0 24px 18px;margin-right:40px;
}

/* CTA */
.cta-band{
  position:relative;border-radius:var(--r-lg);overflow:hidden;background:var(--ink);color:var(--paper);
  padding:64px 56px;display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;background-image:url("/assets/images/backpic/back-3.png");
  background-size:cover;background-position:center;opacity:.18;filter:grayscale(1);
}
.cta-band>*{position:relative;z-index:1}
.cta-band h2{font-size:clamp(24px,2.8vw,36px);font-weight:700;line-height:1.25}
.cta-band p{margin-top:14px;font-size:15.5px;color:rgba(247,246,242,.75);max-width:520px}
.cta-band .cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
.cta-band .btn-primary{background:var(--volt);color:var(--ink)}
.cta-band .btn-primary:hover{background:var(--paper);color:var(--ink)}
.cta-band .btn-ghost{border-color:rgba(247,246,242,.6);color:var(--paper)}
.cta-band .btn-ghost:hover{background:var(--paper);color:var(--ink);border-color:var(--paper)}

/* Footer */
.site-footer{margin-top:120px;background:var(--ink);color:var(--paper);padding:80px 0 40px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:44px}
.footer-brand__main{display:block;font-size:20px;font-weight:800;letter-spacing:-.01em}
.footer-brand__sub{display:block;font-size:11px;letter-spacing:.2em;color:var(--volt);font-weight:600;margin-top:4px}
.footer-brand p{margin-top:18px;font-size:14px;line-height:1.8;color:rgba(247,246,242,.68);max-width:280px}
.footer-col h4{font-size:13px;letter-spacing:.14em;font-weight:600;color:rgba(247,246,242,.6);text-transform:uppercase}
.footer-col ul{margin-top:20px;display:grid;gap:12px}
.footer-col a{font-size:14.5px;color:rgba(247,246,242,.86);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--volt)}
.footer-contact span{display:block;font-size:14.5px;color:rgba(247,246,242,.86);margin-top:14px}
.footer-bottom{
  margin-top:56px;padding-top:24px;border-top:1px solid rgba(247,246,242,.16);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13px;color:rgba(247,246,242,.6);
}
.footer-bottom strong{color:var(--paper);font-weight:600}

/* Mobile bar */
.mobile-bar{
  position:fixed;left:16px;right:16px;bottom:calc(16px + env(safe-area-inset-bottom));
  display:none;align-items:center;justify-content:space-between;gap:14px;
  padding:10px 10px 10px 20px;border-radius:var(--r-pill);
  background:rgba(20,22,26,.94);backdrop-filter:blur(12px);color:var(--paper);
  box-shadow:var(--shadow-dock);z-index:80;transform:translateY(24px);opacity:0;pointer-events:none;
  transition:transform .28s var(--ease),opacity .28s var(--ease);
}
.mobile-bar.is-show{transform:none;opacity:1;pointer-events:auto}
.mobile-bar span{font-size:14px}
.mobile-bar .btn{padding:10px 18px;font-size:13.5px}

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

/* Breakpoints */
@media (max-width:1279px){
  .container{max-width:1080px}
  .hero__grid{gap:44px}
}
@media (max-width:1023px){
  .section{padding:88px 0}
  .hero{padding:132px 0 72px}
  .hero__grid{grid-template-columns:1fr;gap:44px}
  .hero__media{max-width:640px}
  .flow-grid{grid-template-columns:repeat(2,1fr)}
  .flow-item{padding:28px 22px 24px 0;border-bottom:1px solid var(--line)}
  .flow-item:nth-child(2n){border-right:none;padding-right:0}
  .metrics{grid-template-columns:repeat(2,1fr);gap:32px 24px;padding:34px 28px}
  .split{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .cta-band{grid-template-columns:1fr;padding:48px 36px}
  .cta-band .cta-actions{justify-content:flex-start}
  .rhythm{grid-template-columns:1fr;gap:20px}
  .rhythm-card--dark{margin-top:0}
}
@media (max-width:900px){
  .dock{padding:8px 10px 8px 18px;gap:10px}
  .dock-toggle{display:inline-flex}
  .dock-nav{
    position:fixed;left:16px;right:16px;top:82px;display:none;flex-direction:column;align-items:stretch;gap:2px;
    padding:14px;border-radius:var(--r-lg);border:1px solid var(--line);
    background:rgba(247,246,242,.98);backdrop-filter:blur(16px);box-shadow:var(--shadow-dock);
    max-height:calc(100vh - 120px);overflow:auto;
  }
  .dock-nav.is-open{display:flex}
  .dock-link{padding:16px 14px;font-size:17px;min-height:56px;display:flex;align-items:center;border-radius:var(--r-md)}
  .dock-link.is-active{background:var(--surface)}
  .dock-link.is-active::after{left:auto;right:16px;transform:none;bottom:50%;margin-bottom:-2px}
  .dock-nav__cta{display:block;margin-top:10px}
  .dock-nav__cta .btn{width:100%;justify-content:center}
  .dock-actions .btn{display:none}
}
@media (max-width:767px){
  body{padding-bottom:78px}
  .container{padding:0 18px}
  .section{padding:64px 0}
  .hero{padding:118px 0 56px}
  .hero h1{font-size:clamp(28px,7.4vw,38px)}
  .hero__lead{font-size:16.5px}
  .hero__stats div{padding-right:20px;margin-right:20px}
  .hero__stats dt{font-size:20px}
  .hero__img-sub{width:38%;border-width:4px}
  .dock-wrap{padding:12px 12px}
  .dock-nav{top:74px;left:12px;right:12px}
  .section-head{margin-bottom:32px}
  .row-item{grid-template-columns:32px minmax(0,1fr);gap:12px 14px;padding:22px 4px;align-items:start}
  .row-index{font-size:16px;padding-top:4px}
  .row-thumb{grid-column:2;width:100%;max-width:260px}
  .row-body{grid-column:2}
  .row-go{display:none}
  .row-item:hover{padding-left:4px;background:transparent}
  .row-body h3{font-size:18px}
  .row-body p{font-size:14.5px}
  .faq-q{font-size:16.5px;gap:16px;padding:20px 0}
  .faq-a p{margin-right:0}
  .metrics{grid-template-columns:1fr;gap:26px;padding:28px 22px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .site-footer{padding:64px 0 32px;margin-top:80px}
  .footer-bottom{flex-direction:column;gap:8px}
  .cta-band{padding:36px 24px;border-radius:var(--r-md)}
  .mobile-bar{display:flex}
  .btn{padding:13px 22px;font-size:14.5px}
}
@media (max-width:520px){
  .hero__actions .btn{width:100%;justify-content:center}
  .filter-bar{flex-direction:column;align-items:flex-start;gap:14px}
  .pager{gap:8px}
  .pager a,.pager span{min-width:40px;height:40px;font-size:13px}
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html.js .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category4 */
:root{
  --paper:#F7F6F2;
  --surface:#FFFFFF;
  --ink:#14161A;
  --ink-soft:#3B4048;
  --muted:#83888F;
  --line:#E4E1D9;
  --volt:#CDF24C;
  --volt-ink:#6E8A0F;
  --spark:#FF6A2C;
  --ok:#3E9E5A;
  --warn:#D9A21B;
  --err:#D64545;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(20,22,26,.04), 0 12px 28px -16px rgba(20,22,26,.14);
  --shadow-dock:0 10px 36px -12px rgba(20,22,26,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:system-ui,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"IBM Plex Mono","SFMono-Regular",Menlo,Consolas,monospace;
  --secy:120px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    linear-gradient(rgba(20,22,26,.026) 1px,transparent 1px),
    linear-gradient(90deg,rgba(20,22,26,.026) 1px,transparent 1px);
  background-size:56px 56px;
  background-position:-1px -1px;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
::selection{background:var(--volt);color:var(--ink);}
:focus-visible{outline:2px solid var(--volt);outline-offset:2px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:var(--secy) 0;}
.section--tight{padding:72px 0;}
.mono{font-family:var(--mono);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--muted);
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--volt);display:block;}
.h2{font-size:clamp(26px,3.2vw,40px);font-weight:700;line-height:1.2;letter-spacing:-.01em;}
.lead{font-size:18px;line-height:1.75;color:var(--ink-soft);}
.muted{color:var(--muted);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:15px 28px;border-radius:var(--r-pill);
  border:1px solid transparent;cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{background:var(--ink);color:var(--paper);}
.btn-primary:hover{background:var(--volt);color:var(--ink);transform:translateY(-2px);}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-2px);}
.btn-volt{background:var(--volt);color:var(--ink);}
.btn-volt:hover{background:var(--paper);color:var(--ink);transform:translateY(-2px);}
.btn-line-light{background:transparent;border-color:rgba(247,246,242,.45);color:var(--paper);}
.btn-line-light:hover{border-color:var(--volt);color:var(--volt);transform:translateY(-2px);}
.btn-sm{padding:11px 20px;font-size:14px;}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:600;color:var(--ink);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease);
}
.link-arrow svg{transition:transform .2s var(--ease);}
.link-arrow:hover{color:var(--volt-ink);}
.link-arrow:hover svg{transform:translateX(4px);}

/* ---------- Dock 导航 ---------- */
.dock-wrap{position:fixed;top:16px;left:0;right:0;z-index:80;padding:0 16px;pointer-events:none;}
.dock{
  pointer-events:auto;
  position:relative;
  max-width:1080px;margin:0 auto;
  display:flex;align-items:center;gap:16px;
  padding:10px 12px 10px 20px;
  border-radius:var(--r-pill);
  background:rgba(247,246,242,.72);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border:1px solid var(--line);
  box-shadow:var(--shadow-dock);
}
.brand{display:flex;flex-direction:column;line-height:1;flex:none;}
.brand__main{font-size:18px;font-weight:800;letter-spacing:-.01em;}
.brand__sub{font-size:10px;letter-spacing:.34em;color:var(--muted);margin-top:3px;}
.dock-nav{display:flex;align-items:center;gap:2px;margin-left:10px;flex:1;}
.dock-link{
  position:relative;padding:10px 13px;border-radius:var(--r-pill);
  font-size:14.5px;color:var(--ink-soft);
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.dock-link:hover{color:var(--ink);background:rgba(20,22,26,.05);}
.dock-link.is-active{color:var(--ink);font-weight:600;}
.dock-link.is-active::after{
  content:"";position:absolute;left:50%;bottom:1px;width:4px;height:4px;
  border-radius:50%;background:var(--volt);transform:translateX(-50%);
}
.dock-nav__cta{display:none;}
.dock-actions{display:flex;align-items:center;gap:8px;margin-left:auto;flex:none;}
.icon-btn{
  width:40px;height:40px;display:grid;place-items:center;
  border-radius:50%;border:1px solid var(--line);background:var(--surface);
  cursor:pointer;transition:border-color .2s var(--ease),transform .2s var(--ease),background-color .2s var(--ease);
}
.icon-btn:hover{border-color:var(--ink);transform:translateY(-2px);}
.dock-toggle{display:none;}

/* ---------- Hero ---------- */
.page-hero{padding:132px 0 64px;}
.hero-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:56px;align-items:center;}
.hero-copy h1{
  font-size:clamp(40px,6vw,72px);
  font-weight:800;line-height:1.08;letter-spacing:-.01em;
  margin:20px 0 22px;
}
.mark-volt{
  background:linear-gradient(transparent 62%,var(--volt) 62%);
  padding:0 2px;
}
.hero-copy p{font-size:18px;color:var(--ink-soft);max-width:34em;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:26px;margin-top:44px;}
.hero-stat{padding-left:20px;border-left:1px solid var(--line);}
.hero-stat:first-child{padding-left:0;border-left:0;}
.hero-stat__num{font-family:var(--mono);font-size:28px;font-weight:700;line-height:1.1;}
.hero-stat__label{font-size:13px;color:var(--muted);}
.hero-media{position:relative;height:400px;}
.hero-media__main{
  position:absolute;top:0;right:0;left:44px;bottom:52px;
  border-radius:var(--r-lg);overflow:hidden;background:#E9E7E0;
  box-shadow:var(--shadow-1);
}
.hero-media__main img{width:100%;height:100%;object-fit:cover;}
.hero-media__sub{
  position:absolute;left:0;bottom:0;width:46%;aspect-ratio:4/3;
  border-radius:var(--r-lg);overflow:hidden;background:#E9E7E0;
  border:6px solid var(--paper);transform:rotate(-1deg);
  box-shadow:var(--shadow-1);
}
.hero-media__sub img{width:100%;height:100%;object-fit:cover;}

/* ---------- 面包屑 ---------- */
.crumbs{padding:0 0 8px;}
.crumbs ol{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--muted);}
.crumbs a:hover{color:var(--ink);}
.crumbs .sep{color:var(--line);}

/* ---------- 图文交替 ---------- */
.split-head{max-width:640px;margin-bottom:64px;}
.split-head .h2{margin-top:16px;}
.split-head p{margin-top:16px;color:var(--ink-soft);}
.split{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:44px 0;border-top:1px solid var(--line);
}
.split:last-of-type{border-bottom:1px solid var(--line);}
.split--rev .split__media{order:-1;}
.split__media{
  border-radius:var(--r-lg);overflow:hidden;background:#E9E7E0;
  aspect-ratio:4/3;box-shadow:var(--shadow-1);
}
.split__media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.split:hover .split__media img{transform:scale(1.03);}
.split__no{
  font-family:var(--mono);font-size:12px;letter-spacing:.16em;
  color:var(--volt-ink);font-weight:700;
}
.split__body h3{font-size:22px;font-weight:600;line-height:1.4;margin:10px 0 14px;}
.split__body p{color:var(--ink-soft);font-size:16.5px;}
.point-list{margin-top:20px;display:grid;gap:10px;}
.point-list li{position:relative;padding-left:20px;font-size:15px;color:var(--ink-soft);}
.point-list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;
  border-radius:50%;background:var(--volt);
}

/* ---------- 数据带 ---------- */
.stat-band{border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.stat-band__grid{display:grid;grid-template-columns:repeat(4,1fr);}
.stat-band__item{padding:44px 28px;border-left:1px solid var(--line);}
.stat-band__item:first-child{border-left:0;padding-left:0;}
.stat-band__num{font-family:var(--mono);font-size:clamp(30px,3.4vw,42px);font-weight:700;line-height:1.1;}
.stat-band__num span{font-size:16px;font-weight:600;color:var(--volt-ink);margin-left:6px;}
.stat-band__label{font-size:13px;color:var(--muted);margin-top:8px;}

/* ---------- 规则速查行 ---------- */
.rules{border-top:1px solid var(--line);}
.rule-row{
  display:grid;grid-template-columns:72px 1fr 120px;gap:28px;align-items:center;
  padding:26px 0;border-bottom:1px solid var(--line);
  transition:background-color .2s var(--ease),padding-left .2s var(--ease);
}
.rule-row:hover{background:rgba(205,242,76,.16);padding-left:12px;}
.rule-row__no{font-family:var(--mono);font-size:13px;color:var(--muted);font-weight:700;}
.rule-row h3{font-size:18px;font-weight:600;margin-bottom:4px;}
.rule-row p{font-size:15px;color:var(--ink-soft);}
.rule-row__tag{
  justify-self:end;
  font-size:12px;font-weight:600;padding:6px 12px;border-radius:var(--r-sm);
  background:var(--volt);color:var(--ink);white-space:nowrap;
}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);margin-top:48px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:26px 0;background:none;border:0;text-align:left;cursor:pointer;
  font-size:18px;font-weight:600;line-height:1.5;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--volt-ink);}
.faq-icon{position:relative;width:18px;height:18px;flex:none;transition:transform .25s var(--ease);}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--ink);border-radius:2px;
  transition:background-color .25s var(--ease);
}
.faq-icon::before{left:8px;top:0;width:2px;height:18px;}
.faq-icon::after{top:8px;left:0;width:18px;height:2px;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-item.is-open .faq-icon::before,
.faq-item.is-open .faq-icon::after{background:var(--volt-ink);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease);}
.faq-a__inner{
  padding:0 0 28px 16px;border-left:2px solid var(--volt);
  font-size:15px;line-height:1.8;color:var(--ink-soft);
}

/* ---------- CTA 区块 ---------- */
.cta-block{
  background:var(--ink);color:var(--paper);
  border-radius:var(--r-lg);
  padding:56px;
  display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;
}
.cta-block h2{font-size:clamp(24px,2.8vw,34px);font-weight:700;line-height:1.25;}
.cta-block p{color:rgba(247,246,242,.72);font-size:16px;margin-top:14px;max-width:44em;}
.cta-block__actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 分页占位 ---------- */
.pager-wrap{display:flex;flex-direction:column;align-items:center;gap:20px;}
.pager{display:flex;align-items:center;gap:10px;}
.pager__item{
  width:44px;height:44px;display:grid;place-items:center;
  border-radius:50%;border:1px solid var(--line);background:var(--surface);
  font-family:var(--mono);font-size:14px;font-weight:600;
  transition:border-color .2s var(--ease),transform .2s var(--ease),color .2s var(--ease);
}
.pager__item:hover{border-color:var(--ink);transform:translateY(-2px);}
.pager__item.is-current{background:var(--ink);border-color:var(--ink);color:var(--volt);}
.pager__item.is-disabled{opacity:.4;cursor:not-allowed;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(247,246,242,.72);margin-top:120px;padding:80px 0 32px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;}
.footer-brand__main{display:block;font-size:22px;font-weight:800;color:var(--paper);line-height:1.1;letter-spacing:-.01em;}
.footer-brand__sub{display:block;font-size:10px;letter-spacing:.34em;color:rgba(247,246,242,.55);margin:6px 0 18px;}
.footer-brand p{font-size:14.5px;max-width:26em;}
.footer-col h4{font-size:13px;letter-spacing:.14em;color:var(--paper);font-weight:600;margin-bottom:18px;}
.footer-col ul{display:grid;gap:11px;}
.footer-col a,.footer-contact span{font-size:14.5px;color:rgba(247,246,242,.72);transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--volt);}
.footer-contact{display:grid;gap:11px;align-content:start;}
.footer-bottom{
  margin-top:56px;padding-top:24px;border-top:1px solid rgba(247,246,242,.14);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(247,246,242,.55);
}
.footer-bottom strong{color:var(--paper);font-weight:600;}

/* ---------- 移动固定条 ---------- */
.mobile-bar{
  position:fixed;left:16px;right:16px;bottom:calc(16px + env(safe-area-inset-bottom));
  z-index:70;display:none;align-items:center;gap:12px;
  padding:12px 14px;border-radius:var(--r-pill);
  background:rgba(20,22,26,.94);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:var(--shadow-dock);
  transform:translateY(24px);opacity:0;pointer-events:none;
  transition:opacity .28s var(--ease),transform .28s var(--ease);
}
.mobile-bar.is-visible{transform:none;opacity:1;pointer-events:auto;}
.mobile-bar span{font-size:14px;color:var(--paper);flex:1;line-height:1.4;}

/* ---------- 滚动显现 ---------- */
html.js .reveal{opacity:0;transform:translateY(12px);}
html.js .reveal.is-in{opacity:1;transform:none;transition:opacity .55s var(--ease),transform .55s var(--ease);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  :root{--secy:104px;}
  .hero-grid{gap:44px;}
}
@media (max-width:1023px){
  :root{--secy:88px;}
  .dock{padding:10px 12px;gap:12px;border-radius:var(--r-lg);}
  .brand__main{font-size:17px;}
  .dock-nav{
    position:absolute;top:calc(100% + 12px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;margin:0;
    background:rgba(247,246,242,.97);
    -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
    border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:var(--shadow-dock);padding:12px;
    max-height:0;opacity:0;overflow:hidden;pointer-events:none;
    transition:max-height .3s var(--ease),opacity .25s var(--ease);
  }
  .dock.is-open .dock-nav{max-height:560px;opacity:1;pointer-events:auto;}
  .dock-link{padding:16px 14px;font-size:17px;border-radius:var(--r-md);border-left:3px solid transparent;}
  .dock-link.is-active{background:rgba(205,242,76,.2);border-left-color:var(--volt);}
  .dock-link.is-active::after{display:none;}
  .dock-nav__cta{display:block;padding:14px 14px 6px;}
  .dock-nav__cta .btn{width:100%;}
  .dock-toggle{display:grid;}
  .dock-actions .btn-sm{display:none;}
  .page-hero{padding:112px 0 48px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-media{height:340px;}
  .hero-media__main{left:24px;}
  .split{grid-template-columns:1fr;gap:28px;padding:36px 0;}
  .split--rev .split__media{order:0;}
  .stat-band__grid{grid-template-columns:repeat(2,1fr);}
  .stat-band__item{border-left:1px solid var(--line);padding:32px 22px;}
  .stat-band__item:nth-child(odd){border-left:0;padding-left:0;}
  .stat-band__item:nth-child(3),
  .stat-band__item:nth-child(4){border-top:1px solid var(--line);}
  .rule-row{grid-template-columns:56px 1fr;gap:18px;}
  .rule-row__tag{grid-column:2;justify-self:start;}
  .cta-block{padding:40px 28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .site-footer{margin-top:88px;}
}
@media (max-width:767px){
  :root{--secy:64px;}
  body{font-size:16px;padding-bottom:92px;}
  .container{padding:0 18px;}
  .page-hero{padding:104px 0 40px;}
  .hero-copy h1{font-size:clamp(34px,9vw,46px);}
  .hero-media{height:280px;}
  .hero-media__main{left:16px;bottom:44px;}
  .hero-media__sub{width:52%;}
  .hero-stats{gap:18px;margin-top:32px;}
  .hero-stat{padding-left:16px;}
  .stat-band__grid{grid-template-columns:1fr;}
  .stat-band__item{border-left:0 !important;padding:24px 0 !important;border-top:1px solid var(--line);}
  .stat-band__item:first-child{border-top:0;}
  .rule-row{grid-template-columns:1fr;gap:10px;padding:22px 0;}
  .rule-row__no{margin-bottom:2px;}
  .faq-q{font-size:16.5px;padding:22px 0;}
  .cta-block{padding:32px 22px;border-radius:var(--r-md);}
  .cta-block__actions{width:100%;}
  .cta-block__actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;gap:10px;}
  .mobile-bar{display:flex;left:16px;right:16px;}
  .btn{padding:14px 24px;}
}
@media (max-width:480px){
  .hero-media__main{left:0;bottom:0;position:relative;inset:auto;height:220px;}
  .hero-media{height:auto;}
  .hero-media__sub{display:none;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important;}
  html{scroll-behavior:auto;}
  html.js .reveal{opacity:1 !important;transform:none !important;}
}