/* roulang page: index */
:root{
  --ink:#14181C;
  --ink-2:#232A31;
  --paper:#FAF8F5;
  --paper-2:#F1EDE6;
  --accent:#D7263D;
  --accent-d:#B41E31;
  --lime:#C6F24E;
  --muted:#6B7280;
  --rule:rgba(20,24,28,.12);
  --rule-strong:rgba(20,24,28,.26);
  --r:10px;
  --r-sm:8px;
  --shadow:0 2px 0 rgba(20,24,28,.06);
  --maxw:1200px;
  --font:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:var(--ink);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--accent)}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:-.3px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
time{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 32px}

/* ---------- 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 24px;border-radius:var(--r-sm);
  border:1px solid transparent;text-decoration:none;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
  white-space:nowrap;
}
.btn:focus-visible{outline:2px solid var(--lime);outline-offset:3px}
.btn--accent{background:var(--accent);color:#fff}
.btn--accent:hover{background:var(--accent-d);color:#fff;transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn--ghost:hover{background:var(--ink);color:#fff;transform:translateY(-1px)}
.btn--light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn--light:hover{background:#fff;color:var(--ink);border-color:#fff;transform:translateY(-1px)}
.btn--sm{padding:11px 18px;font-size:14px}

/* ---------- 公告条 ---------- */
.announce{background:var(--ink);color:rgba(255,255,255,.82);font-size:13px}
.announce .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:36px;padding-top:6px;padding-bottom:6px}
.announce-text{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.announce-close{background:none;border:0;color:rgba(255,255,255,.6);font-size:18px;line-height:1;padding:2px 8px;transition:color .18s ease}
.announce-close:hover{color:var(--lime)}

/* ---------- 导航 ---------- */
.nav-bar{
  position:sticky;top:0;z-index:60;
  background:rgba(250,248,245,.95);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--rule);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:74px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:-.5px;color:var(--ink);white-space:nowrap}
.brand:hover{color:var(--ink)}
.brand-mark{width:18px;height:18px;border-radius:50%;border:2px solid var(--ink);position:relative;flex:none}
.brand-mark::after{content:"";position:absolute;inset:4px;background:var(--accent);border-radius:50%}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-link{position:relative;display:inline-block;font-size:15px;font-weight:500;color:var(--ink);padding:6px 0}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--accent);transition:width .2s ease}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--accent)}
.nav-link.is-active::after{width:100%}
.nav-side{display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--rule-strong);border-radius:var(--r-sm);background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:4px;padding:0}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);transition:background .18s ease}
.nav-toggle:hover span{background:var(--accent)}
.nav-close{display:none;position:absolute;top:20px;right:20px;width:42px;height:42px;border:1px solid var(--rule-strong);border-radius:var(--r-sm);background:#fff;font-size:20px;line-height:1;color:var(--ink)}

/* ---------- Hero ---------- */
.hero{position:relative;isolation:isolate;overflow:hidden;background:var(--ink);color:#fff}
.hero-media{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;opacity:.55;filter:saturate(.82);z-index:0}
.hero::after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(100deg,rgba(20,24,28,.95) 0%,rgba(20,24,28,.82) 44%,rgba(20,24,28,.45) 100%)}
.hero-inner{position:relative;z-index:2;padding:96px 0 0}
.hero-copy{max-width:760px}
.hero-kicker{display:inline-flex;align-items:center;gap:10px;font-size:13px;letter-spacing:1px;color:rgba(255,255,255,.72);margin-bottom:22px}
.hero-kicker i{width:6px;height:6px;border-radius:50%;background:var(--lime);display:inline-block}
.hero h1{
  font-size:clamp(30px,4.2vw,54px);
  font-weight:800;line-height:1.15;letter-spacing:-.5px;color:#fff;
}
.hero-sub{margin-top:22px;font-size:17px;line-height:1.8;color:rgba(255,255,255,.78);max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}
.hero-stats{
  position:relative;z-index:2;
  margin-top:78px;
  border-top:1px solid rgba(255,255,255,.16);
  display:grid;grid-template-columns:repeat(3,1fr);
}
.stat{padding:26px 0 34px}
.stat + .stat{padding-left:32px;border-left:1px solid rgba(255,255,255,.16)}
.stat-num{display:flex;align-items:center;gap:9px;font-family:var(--mono);font-size:26px;font-weight:700;letter-spacing:-1px;color:#fff;line-height:1.1}
.stat-dot{width:6px;height:6px;border-radius:50%;background:var(--lime);flex:none}
.stat-label{margin-top:6px;font-size:13px;color:rgba(255,255,255,.62)}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section--line{border-top:1px solid var(--rule)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:44px}
.sec-kicker{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.6px;color:var(--accent);margin-bottom:12px}
.sec-kicker::before{content:"";width:18px;height:2px;background:var(--accent)}
.sec-title{font-size:clamp(24px,3vw,34px);font-weight:800;letter-spacing:-.6px}
.sec-desc{margin-top:12px;font-size:15px;color:var(--muted);max-width:660px}
.sec-link{display:inline-block;font-size:14px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--rule-strong);padding-bottom:2px;white-space:nowrap;transition:color .18s ease,border-color .18s ease}
.sec-link:hover{color:var(--accent);border-color:var(--accent)}

/* ---------- 三步 ---------- */
.steps{display:flex;gap:0;align-items:stretch}
.step{flex:1;position:relative;padding:0 32px;border-left:1px dashed var(--rule-strong)}
.step:first-child{padding-left:0;border-left:0}
.step:last-child{padding-right:0}
.step::before{content:"";position:absolute;left:-3px;top:24px;width:6px;height:6px;border-radius:50%;background:var(--lime)}
.step:first-child::before{display:none}
.step-num{display:block;font-family:var(--mono);font-size:42px;font-weight:700;line-height:1;letter-spacing:-2px;color:var(--accent);margin-bottom:16px}
.step h3{font-size:19px;margin-bottom:10px}
.step p{font-size:14.5px;line-height:1.75;color:var(--muted)}

/* ---------- 频道卡 ---------- */
.channel-card{display:flex;flex-direction:column;height:100%;background:#fff;border:1px solid var(--rule);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);transition:transform .18s ease,border-color .18s ease;color:var(--ink)}
.channel-card:hover{transform:translateY(-2px);border-color:var(--accent);color:var(--ink)}
.channel-media{overflow:hidden}
.channel-media img{width:100%;aspect-ratio:16/10;object-fit:cover;filter:saturate(.92);transition:transform .22s ease}
.channel-card:hover .channel-media img{transform:scale(1.02)}
.channel-body{padding:26px 26px 28px;display:flex;flex-direction:column;flex:1}
.channel-body h3{font-size:20px;margin-bottom:10px}
.channel-body p{font-size:14.5px;line-height:1.75;color:var(--muted)}
.channel-more{margin-top:18px;font-size:14px;font-weight:600;color:var(--accent)}

/* ---------- 场景卡 ---------- */
.scene{background:#fff;border:1px solid var(--rule);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden;transition:transform .18s ease,border-color .18s ease}
.scene:hover{transform:translateY(-2px);border-color:var(--accent)}
.scene--lg{display:flex;flex-direction:column;height:100%}
.scene--lg .scene-media{overflow:hidden}
.scene--lg .scene-media img{width:100%;aspect-ratio:4/3;object-fit:cover;filter:saturate(.9);transition:transform .22s ease}
.scene--lg:hover .scene-media img{transform:scale(1.02)}
.scene-body{padding:26px 28px 30px}
.scene-body h3{font-size:19px;margin:14px 0 10px;line-height:1.45}
.scene-body p{font-size:14.5px;line-height:1.78;color:var(--muted)}
.scene-link{display:inline-block;margin-top:16px;font-size:14px;font-weight:600;color:var(--accent)}
.scene-stack{display:grid;gap:24px;height:100%}
.scene--sm{display:flex;gap:16px;padding:16px}
.scene--sm img{width:126px;flex:none;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-sm);filter:saturate(.9)}
.scene--sm .scene-body{padding:0;display:flex;flex-direction:column}
.scene--sm h3{font-size:16px;margin:8px 0 6px;line-height:1.45}
.scene--sm p{font-size:13.5px;line-height:1.7}
.tag{display:inline-flex;align-items:center;font-size:12px;line-height:1;padding:6px 12px;border:1px solid var(--rule-strong);border-radius:999px;color:var(--muted);background:var(--paper)}

/* ---------- 最新信息 ---------- */
.info-card{display:flex;flex-direction:column;height:100%;background:#fff;border:1px solid var(--rule);border-radius:var(--r);padding:24px;box-shadow:var(--shadow);color:var(--ink);transition:transform .18s ease,border-color .18s ease}
.info-card:hover{transform:translateY(-2px);border-color:var(--accent);color:var(--ink)}
.info-title{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:51px}
.info-summary{margin-top:10px;font-size:14px;line-height:1.72;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.info-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--rule);display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12.5px;color:var(--muted)}
.empty-state{border:1px dashed var(--rule-strong);border-radius:var(--r);padding:44px 32px;text-align:center;background:#fff}
.empty-state p{font-size:15px;color:var(--muted);margin-bottom:16px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px}
.faq-accordion .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--rule)}
.faq-accordion .accordion-item:first-child{border-top:1px solid var(--rule)}
.faq-accordion .accordion-header{margin:0}
.faq-accordion .accordion-button{
  position:relative;width:100%;background:transparent;border:0;border-radius:0;
  padding:22px 48px 22px 0;font-size:16.5px;font-weight:600;color:var(--ink);
  box-shadow:none;text-align:left;line-height:1.55;
}
.faq-accordion .accordion-button:not(.collapsed){color:var(--accent);background:transparent;box-shadow:none}
.faq-accordion .accordion-button:focus{box-shadow:none;outline:2px solid var(--lime);outline-offset:-2px}
.faq-accordion .accordion-button::after{
  content:"+";background-image:none;width:auto;height:auto;
  font-size:24px;font-weight:400;line-height:1;color:var(--accent);
  position:absolute;right:6px;top:50%;transform:translateY(-50%);
  display:flex;align-items:center;justify-content:center;
}
.faq-accordion .accordion-button:not(.collapsed)::after{content:"−";transform:translateY(-50%)}
.faq-accordion .accordion-body{padding:0 48px 24px 0;font-size:15px;line-height:1.85;color:#3C444C}

/* ---------- CTA 条 ---------- */
.cta-band{background:var(--ink);color:#fff;padding:76px 0}
.cta-band .wrap{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta-title{font-size:clamp(22px,2.6vw,30px);font-weight:800;letter-spacing:-.5px;line-height:1.35}
.cta-note{margin-top:12px;font-size:14px;color:rgba(255,255,255,.66);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- 页脚 ---------- */
.site-footer{background:#0F1215;color:rgba(255,255,255,.7);font-size:14px;border-top:1px solid rgba(255,255,255,.1);padding-top:72px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px;padding-bottom:56px}
.brand--footer{color:#fff;margin-bottom:16px}
.brand--footer:hover{color:#fff}
.brand--footer .brand-mark{border-color:#fff}
.footer-about{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:340px}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:18px;letter-spacing:.4px}
.footer-col li{margin-bottom:12px}
.footer-col a{color:rgba(255,255,255,.66);font-size:14px}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:24px 0 32px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5)}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .wrap{padding:0 28px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:36px}
}
@media (max-width:991.98px){
  .section{padding:72px 0}
  .nav-toggle{display:flex}
  .nav-cta{display:none}
  .nav-links{
    position:fixed;left:0;right:0;top:0;bottom:0;z-index:70;
    background:var(--paper);
    flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:0;padding:88px 28px 40px;overflow-y:auto;
    transform:translateX(100%);transition:transform .24s ease;
  }
  .nav-links.is-open{transform:translateX(0)}
  .nav-links .nav-link{width:100%;font-size:20px;font-weight:600;padding:20px 0;border-bottom:1px solid var(--rule)}
  .nav-links .nav-link::after{display:none}
  .nav-close{display:block}
  .hero-inner{padding:72px 0 0}
  .hero-stats{margin-top:56px}
  .steps{flex-direction:column}
  .step{flex:none;padding:0 0 32px 28px;border-left:1px dashed var(--rule-strong)}
  .step:first-child{padding-left:28px;border-left:1px dashed var(--rule-strong)}
  .step:first-child::before{display:block}
  .step:last-child{padding-bottom:0;padding-right:0}
  .step::before{top:10px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-about{max-width:none}
}
@media (max-width:767.98px){
  .wrap{padding:0 20px}
  .section{padding:60px 0}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px}
  .hero-sub{font-size:16px}
  .hero-actions{gap:12px}
  .hero-actions .btn{flex:1 1 auto;justify-content:center}
  .hero-stats{grid-template-columns:1fr;margin-top:48px}
  .stat + .stat{padding-left:0;border-left:0;border-top:1px solid rgba(255,255,255,.16)}
  .stat{padding:20px 0}
  .cta-band .wrap{flex-direction:column;align-items:flex-start}
  .cta-band{padding:60px 0}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto;justify-content:center}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:40px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .site-footer{padding-top:56px}
  .scene--sm img{width:104px}
  .faq-accordion .accordion-button{font-size:15.5px;padding-right:40px}
  .faq-accordion .accordion-body{padding-right:16px}
}
@media (max-width:575.98px){
  .brand{font-size:16px}
  .hero h1{letter-spacing:-.3px}
  .step-num{font-size:34px}
  .scene--sm{flex-direction:column;gap:12px}
  .scene--sm img{width:100%;aspect-ratio:16/9}
  .info-foot{flex-direction:column;align-items:flex-start;gap:8px}
}

/* roulang page: article */
:root{
  --ink:#14181C;
  --ink-soft:#232A31;
  --paper:#FAF8F5;
  --paper-2:#F2EEE8;
  --accent:#D7263D;
  --lime:#C6F24E;
  --muted:#6B7280;
  --body-text:#24292E;
  --rule:rgba(20,24,28,.12);
  --radius:10px;
  --radius-sm:8px;
  --shadow:0 2px 0 rgba(20,24,28,.06);
  --max:1200px;
  --ease:200ms cubic-bezier(.4,0,.2,1);
  --mono:"SF Mono",ui-monospace,"Roboto Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--body-text);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--accent);}
img{max-width:100%;display:block;height:auto;}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4,p{margin:0;}
::selection{background:rgba(215,38,61,.14);color:var(--ink);}

/* 容器 */
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 32px;}

/* 导航 */
.nav-bar{
  position:sticky;top:0;z-index:80;
  background:rgba(250,248,245,.92);
  -webkit-backdrop-filter:saturate(160%) blur(12px);
  backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--rule);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:76px;}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:800;letter-spacing:-.2px;color:var(--ink);}
.brand-mark{position:relative;flex:0 0 auto;width:20px;height:20px;border:2px solid var(--ink);border-radius:50%;}
.brand-mark::after{content:"";position:absolute;inset:4px;background:var(--accent);border-radius:50%;}
.brand-text{white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:30px;}
.nav-link{position:relative;padding:6px 0;font-size:15px;font-weight:500;color:#3B4249;}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--accent);transition:width var(--ease);}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after,.nav-link.is-active::after{width:100%;}
.nav-link.is-active{color:var(--ink);font-weight:700;}
.nav-side{display:flex;align-items:center;gap:14px;}
.nav-toggle{
  display:none;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  width:42px;height:42px;padding:0;background:transparent;border:1px solid var(--rule);
  border-radius:var(--radius-sm);cursor:pointer;transition:border-color var(--ease);
}
.nav-toggle:hover{border-color:var(--ink);}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;}
.nav-close{
  display:none;position:absolute;top:20px;right:20px;
  width:40px;height:40px;padding:0;line-height:1;font-size:22px;color:var(--ink);
  background:transparent;border:1px solid var(--rule);border-radius:50%;cursor:pointer;
}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border:1px solid transparent;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1.4;text-align:center;cursor:pointer;
  transition:transform var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
}
.btn--sm{padding:9px 16px;font-size:14px;}
.btn--accent{background:var(--accent);color:#fff;}
.btn--accent:hover{background:#BC1F34;color:#fff;transform:translateY(-1px);}
.btn--ink{background:var(--ink);color:var(--paper);}
.btn--ink:hover{background:#2A3138;color:#fff;transform:translateY(-1px);}
.btn--outline{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn--outline:hover{background:var(--ink);color:var(--paper);}
.btn--ghost{background:transparent;border-color:rgba(250,248,245,.45);color:var(--paper);}
.btn--ghost:hover{background:var(--paper);color:var(--ink);border-color:var(--paper);}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:6px;}

/* 文章页头 */
.post-head{
  padding:40px 0 34px;
  border-bottom:1px solid var(--rule);
  background:linear-gradient(180deg,rgba(242,238,232,.85) 0%,rgba(250,248,245,0) 100%);
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:22px;font-size:13px;color:var(--muted);}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--accent);}
.crumb .sep{color:rgba(20,24,28,.26);}
.crumb .crumb-cat{color:#4B5359;}
.crumb .current{color:var(--ink);font-weight:600;max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.post-head h1{
  font-size:clamp(26px,3.6vw,44px);
  line-height:1.26;
  font-weight:800;
  letter-spacing:-.5px;
  color:var(--ink);
  margin:0 0 20px;
  max-width:920px;
  overflow-wrap:anywhere;
}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:13px;color:var(--muted);}
.post-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--accent);}
.post-meta .cat-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 12px;border:1px solid var(--rule);border-radius:999px;
  background:rgba(255,255,255,.7);font-size:12px;color:#3B4249;
}
.post-meta .cat-tag i{width:6px;height:6px;border-radius:50%;background:var(--lime);}

/* 阅读区 */
.article-wrap{padding:56px 0 88px;}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:48px;}
@media (min-width:1200px){
  .article-layout{grid-template-columns:minmax(0,764px) 300px;gap:56px;justify-content:center;}
}
.post-main{min-width:0;}

/* 正文排版 */
.article-body{font-size:17px;line-height:1.85;color:var(--body-text);overflow-wrap:anywhere;}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  position:relative;
  margin:44px 0 18px;
  padding-left:15px;
  font-size:28px;line-height:1.35;font-weight:700;letter-spacing:-.3px;color:var(--ink);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;
  background:var(--accent);border-radius:2px;
}
.article-body h3{margin:32px 0 12px;font-size:21px;line-height:1.45;font-weight:600;color:var(--ink);}
.article-body h4{margin:24px 0 10px;font-size:17px;font-weight:700;color:var(--ink);}
.article-body a{color:var(--accent);text-decoration:underline;text-underline-offset:3px;}
.article-body strong{font-weight:700;color:var(--ink);}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.35em;}
.article-body li{margin:.4em 0;}
.article-body ol > li::marker{color:var(--accent);font-weight:700;}
.article-body ul > li::marker{color:var(--accent);}
.article-body img{border-radius:12px;margin:26px 0;width:100%;}
.article-body figure{margin:26px 0;}
.article-body figcaption{margin-top:10px;font-size:13px;color:var(--muted);text-align:center;}
.article-body blockquote{
  margin:28px 0;padding:16px 22px;
  border-left:3px solid var(--accent);
  background:var(--paper-2);
  border-radius:0 var(--radius) var(--radius) 0;
  color:#3B4249;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--rule);padding:10px 13px;text-align:left;vertical-align:top;}
.article-body thead th{background:var(--paper-2);font-weight:700;color:var(--ink);}
.article-body hr{border:0;border-top:1px solid var(--rule);margin:36px 0;}
.article-body code{font-family:var(--mono);font-size:.92em;background:var(--paper-2);padding:2px 6px;border-radius:4px;}

/* 空态 */
.empty-state{
  border:1px dashed var(--rule);border-radius:var(--radius);
  padding:56px 24px;text-align:center;background:rgba(255,255,255,.6);
}
.empty-state p{margin:0 0 20px;font-size:16px;color:var(--muted);}

/* 文末 */
.post-foot{
  display:flex;flex-wrap:wrap;align-items:center;gap:24px;
  margin-top:52px;padding-top:28px;border-top:1px solid var(--rule);
}
.link-back{font-size:15px;font-weight:600;color:var(--ink);border-bottom:2px solid var(--rule);padding-bottom:2px;transition:border-color var(--ease),color var(--ease);}
.link-back:hover{color:var(--accent);border-color:var(--accent);}

/* 延伸阅读 */
.related{margin-top:48px;padding-top:32px;border-top:1px solid var(--rule);}
.related h2{font-size:18px;font-weight:700;letter-spacing:-.2px;color:var(--ink);margin:0 0 6px;}
.related-list{list-style:none;margin:0;padding:0;}
.related-list li{border-bottom:1px solid var(--rule);}
.related-list li:last-child{border-bottom:0;}
.related-list a{
  display:grid;grid-template-columns:96px minmax(0,1fr) auto;align-items:center;gap:16px;
  padding:16px 0;
  transition:transform var(--ease),color var(--ease);
}
.related-list a:hover{transform:translateY(-1px);}
.rel-cat{font-size:12px;color:var(--accent);font-weight:700;letter-spacing:.2px;}
.rel-title{font-size:15px;color:var(--ink);font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.related-list a:hover .rel-title{color:var(--accent);}
.rel-date{font-size:12px;color:var(--muted);font-family:var(--mono);}

/* 侧栏 */
.post-aside{display:none;}
@media (min-width:1200px){
  .post-aside{display:block;position:sticky;top:96px;align-self:start;}
}
.aside-card{
  background:#fff;border:1px solid var(--rule);border-radius:var(--radius);
  padding:22px;margin-bottom:18px;box-shadow:var(--shadow);
}
.aside-card h3{font-size:15px;font-weight:700;color:var(--ink);margin:0 0 14px;letter-spacing:.2px;}
.aside-card ul{list-style:none;display:grid;gap:10px;}
.aside-card li a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:14px;color:#3B4249;padding-bottom:10px;border-bottom:1px solid var(--rule);
}
.aside-card li:last-child a{border-bottom:0;padding-bottom:0;}
.aside-card li a:hover{color:var(--accent);}
.aside-card li a span{font-family:var(--mono);font-size:12px;color:var(--muted);}
.aside-card p{font-size:13.5px;line-height:1.8;color:var(--muted);margin:0 0 16px;}
.aside-card .btn{width:100%;}

/* CTA 条 */
.cta-band{background:var(--ink);color:var(--paper);padding:64px 0;}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:32px;}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;letter-spacing:-.4px;line-height:1.35;margin:0 0 10px;}
.cta-inner p{margin:0;max-width:58ch;font-size:15px;color:rgba(250,248,245,.72);}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* 页脚 */
.site-footer{background:var(--ink);color:rgba(250,248,245,.75);padding:56px 0 28px;border-top:1px solid rgba(250,248,245,.1);}
.footer-grid{
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:40px;border-bottom:1px solid rgba(250,248,245,.12);
}
.brand--footer{color:var(--paper);}
.brand--footer .brand-mark{border-color:var(--paper);}
.footer-about{margin:16px 0 0;max-width:34ch;font-size:14px;line-height:1.8;color:rgba(250,248,245,.6);}
.footer-col h4{font-size:14px;font-weight:700;color:var(--paper);margin:0 0 14px;}
.footer-col ul{list-style:none;display:grid;gap:10px;}
.footer-col a{font-size:14px;color:rgba(250,248,245,.7);}
.footer-col a:hover{color:var(--lime);}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding-top:24px;font-size:13px;color:rgba(250,248,245,.5);}
.footer-bottom p{margin:0;}

/* 响应式 */
@media (max-width:1199.98px){
  .article-layout{gap:0;}
}
@media (max-width:991.98px){
  .nav-inner{height:66px;}
  .nav-toggle{display:inline-flex;}
  .nav-links{
    position:fixed;inset:0;z-index:90;
    flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;
    padding:88px 24px 40px;background:var(--paper);
    transform:translateX(100%);opacity:0;pointer-events:none;
    transition:transform var(--ease),opacity var(--ease);
  }
  .nav-links.is-open{transform:none;opacity:1;pointer-events:auto;}
  .nav-link{width:100%;padding:18px 0;font-size:20px;border-bottom:1px solid var(--rule);color:var(--ink);}
  .nav-link::after{display:none;}
  .nav-link.is-active{color:var(--accent);}
  .nav-close{display:block;}
  .article-wrap{padding:40px 0 64px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{padding:52px 0;}
}
@media (max-width:767.98px){
  .post-head{padding:28px 0 26px;}
  .article-body{font-size:16px;line-height:1.85;}
  .article-body h2{font-size:23px;margin:34px 0 14px;}
  .article-body h3{font-size:19px;}
  .related-list a{grid-template-columns:1fr;gap:4px;padding:14px 0;}
  .rel-title{white-space:normal;}
  .post-foot{gap:18px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:575.98px){
  .wrap{padding:0 20px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .brand{font-size:16px;}
  .nav-cta{display:none;}
  .crumb .current{white-space:normal;}
}

/* roulang page: category1 */
:root{
  --ink:#14181C;
  --ink-soft:#2A3138;
  --paper:#FAF8F5;
  --paper-2:#F2EEE8;
  --accent:#D7263D;
  --accent-dark:#B41E32;
  --lime:#C6F24E;
  --muted:#6B7280;
  --rule:rgba(20,24,28,.12);
  --rule-strong:rgba(20,24,28,.22);
  --radius:10px;
  --radius-btn:8px;
  --shadow:0 2px 0 rgba(20,24,28,.06);
  --mono:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,ui-monospace,monospace;
  --sans:"Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,"PingFang SC","Microsoft YaHei",sans-serif;
  --gap-section:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{list-style:none;padding:0}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:3px}
::selection{background:rgba(215,38,61,.16)}

.wrap{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}

/* ---------- 导航 ---------- */
.nav-bar{
  position:sticky;
  top:0;
  z-index:70;
  background:rgba(250,248,245,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--rule);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  height:74px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  font-size:17px;
  letter-spacing:-.2px;
  color:var(--ink);
  white-space:nowrap;
}
.brand-mark{
  position:relative;
  width:18px;
  height:18px;
  border:2px solid var(--ink);
  border-radius:50%;
  flex:none;
}
.brand-mark::after{
  content:"";
  position:absolute;
  top:50%;left:50%;
  width:7px;height:7px;
  margin:-3.5px 0 0 -3.5px;
  background:var(--accent);
  border-radius:50%;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:30px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:15px;
  font-weight:500;
  color:var(--ink-soft);
  transition:color .18s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;bottom:-2px;
  height:2px;width:0;
  background:var(--accent);
  transition:width .2s ease;
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--ink);font-weight:700}
.nav-link.is-active::after{width:100%}
.nav-side{display:flex;align-items:center;gap:14px;flex:none}
.nav-close{display:none}
.nav-toggle{display:none}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  border:1px solid transparent;
  border-radius:var(--radius-btn);
  cursor:pointer;
  transition:background-color .18s ease,color .18s ease,transform .18s ease,border-color .18s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn--accent{background:var(--accent);color:#fff}
.btn--accent:hover{background:var(--accent-dark);color:#fff}
.btn--ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn--ghost:hover{background:var(--ink);color:var(--paper)}
.btn--sm{padding:9px 17px;font-size:14px}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--accent);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
  transition:border-color .18s ease,color .18s ease;
}
.link-arrow::after{content:"→";font-family:var(--mono);font-size:14px}
.link-arrow:hover{border-color:var(--accent)}

/* ---------- 页头 ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--rule);
  min-height:264px;
  display:flex;
  align-items:flex-end;
  padding:44px 0 34px;
}
.page-hero__bg{
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center 35%;
  filter:saturate(.72);
  transform:scale(1.01);
}
.page-hero__veil{
  position:absolute;
  inset:0;
  background:linear-gradient(100deg,rgba(20,24,28,.82) 0%,rgba(20,24,28,.66) 52%,rgba(20,24,28,.42) 100%);
}
.page-hero__inner{
  position:relative;
  z-index:2;
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:36px;
  width:100%;
}
.crumbs{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:rgba(250,248,245,.68);
  margin-bottom:14px;
}
.crumbs a{color:rgba(250,248,245,.82);transition:color .18s ease}
.crumbs a:hover{color:#fff}
.crumbs span[aria-current]{color:rgba(250,248,245,.55)}
.page-hero h1{
  font-size:clamp(27px,3.5vw,42px);
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.5px;
  color:var(--paper);
  max-width:21em;
}
.page-hero__lead{
  margin-top:14px;
  font-size:15px;
  line-height:1.8;
  color:rgba(250,248,245,.78);
  max-width:34em;
}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  flex:none;
  padding-bottom:6px;
}
.hero-tag{
  display:inline-block;
  padding:5px 12px;
  font-size:12px;
  letter-spacing:.4px;
  color:rgba(250,248,245,.85);
  border:1px solid rgba(250,248,245,.34);
  border-radius:999px;
}

/* ---------- 数据条 ---------- */
.stat-strip{
  background:var(--paper-2);
  border-bottom:1px solid var(--rule);
}
.stat-strip__inner{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  padding:22px 32px;
}
.stat{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  font-size:14px;
  color:var(--ink-soft);
}
.stat-dot{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--lime);
  flex:none;
}
.stat strong{
  font-family:var(--mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.5px;
  color:var(--ink);
}
.stat-note{color:var(--muted);font-size:13.5px}

/* ---------- 板块通用 ---------- */
.section{padding:var(--gap-section) 0}
.section--line{border-bottom:1px solid var(--rule)}
.section--soft{background:var(--paper-2)}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:28px;
  margin-bottom:44px;
}
.eyebrow{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  font-weight:700;
  letter-spacing:2px;
  color:var(--accent);
  margin-bottom:12px;
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;
  background:var(--accent);
}
.section-head h2{
  font-size:clamp(24px,2.6vw,32px);
  font-weight:700;
  line-height:1.32;
  letter-spacing:-.3px;
  max-width:22em;
}
.section-desc{
  margin-top:12px;
  font-size:15px;
  color:var(--muted);
  max-width:44em;
}
.narrow{max-width:840px}

/* ---------- 时间轴 ---------- */
.timeline{position:relative}
.tl-item{
  position:relative;
  display:grid;
  grid-template-columns:132px 1fr;
  gap:36px;
  padding:30px 0;
  border-top:1px solid var(--rule);
  transition:padding-left .2s ease;
}
.tl-item:last-child{border-bottom:1px solid var(--rule)}
.tl-item::before{
  content:"";
  position:absolute;
  left:-20px;top:14px;bottom:14px;
  width:2px;
  background:var(--accent);
  opacity:0;
  transition:opacity .2s ease;
}
.tl-item:hover::before{opacity:1}
.tl-item:hover{padding-left:6px}
.tl-tag{
  font-family:var(--mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.6px;
  color:var(--accent);
  padding-top:4px;
}
.tl-body h3{
  font-size:21px;
  font-weight:600;
  line-height:1.45;
  letter-spacing:-.2px;
  transition:color .18s ease;
}
.tl-item:hover .tl-body h3{color:var(--accent)}
.tl-body p{
  margin-top:8px;
  font-size:15px;
  line-height:1.8;
  color:var(--muted);
  max-width:52em;
}
.tl-meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:12px;
  margin-top:14px;
  font-size:13px;
  color:var(--muted);
}
.badge{
  display:inline-block;
  padding:3px 11px;
  font-size:12px;
  line-height:1.6;
  color:var(--ink-soft);
  background:var(--paper-2);
  border:1px solid var(--rule-strong);
  border-radius:999px;
}
.tl-meta .dot{color:var(--rule-strong)}

/* ---------- 覆盖范围 ---------- */
.range-split{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:52px;
  align-items:start;
}
.range-figure{
  position:relative;
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--rule);
  box-shadow:var(--shadow);
  aspect-ratio:4/3;
  background:var(--paper-2);
}
.range-figure img{
  width:100%;height:100%;
  object-fit:cover;
  filter:saturate(.82) contrast(1.02);
  transition:transform .2s ease,filter .2s ease;
}
.range-figure:hover img{transform:scale(1.02);filter:saturate(.95)}
.range-figure figcaption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:32px 18px 14px;
  font-size:13px;
  color:rgba(250,248,245,.86);
  background:linear-gradient(to top,rgba(20,24,28,.78),rgba(20,24,28,0));
}
.range-row{
  display:grid;
  grid-template-columns:44px 1fr;
  gap:20px;
  padding:22px 0;
  border-top:1px solid var(--rule);
}
.range-row:last-child{border-bottom:1px solid var(--rule)}
.range-row .num{
  font-family:var(--mono);
  font-size:13px;
  font-weight:700;
  color:var(--accent);
  padding-top:3px;
}
.range-row h3{font-size:18px;font-weight:600;line-height:1.5}
.range-row p{margin-top:6px;font-size:15px;line-height:1.8;color:var(--muted)}

/* ---------- 阅读说明 ---------- */
.note-block p{
  font-size:16px;
  line-height:1.85;
  color:var(--ink-soft);
  max-width:46em;
}
.note-block p + p{margin-top:18px}
.note-block strong{font-weight:700;color:var(--ink)}
.note-quote{
  margin-top:26px;
  padding:18px 22px;
  border-left:3px solid var(--accent);
  background:rgba(242,238,232,.7);
  font-size:15px;
  line-height:1.8;
  color:var(--ink-soft);
  max-width:44em;
}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--rule);max-width:900px}
.faq-item{border-bottom:1px solid var(--rule)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 0;
  background:none;
  border:0;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  cursor:pointer;
  transition:color .18s ease;
}
.faq-q:hover{color:var(--accent)}
.faq-sign{
  flex:none;
  font-family:var(--mono);
  font-size:20px;
  line-height:1;
  color:var(--accent);
  width:22px;
  text-align:center;
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .26s ease;
}
.faq-item.is-open .faq-a{max-height:420px}
.faq-a p{
  padding:0 40px 24px 0;
  margin:0;
  font-size:15px;
  line-height:1.85;
  color:var(--muted);
  max-width:46em;
}

/* ---------- CTA 行 ---------- */
.cta-line{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:38px 0;
  border-top:1px solid var(--rule-strong);
  border-bottom:1px solid var(--rule-strong);
}
.cta-line__text{
  font-size:clamp(18px,2vw,22px);
  font-weight:700;
  line-height:1.5;
  letter-spacing:-.2px;
  max-width:32em;
}
.cta-line__note{
  margin-top:8px;
  font-size:13.5px;
  color:var(--muted);
  font-weight:400;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);
  color:rgba(250,248,245,.72);
  padding:64px 0 30px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:44px;
  padding-bottom:44px;
  border-bottom:1px solid rgba(250,248,245,.16);
}
.brand--footer{color:var(--paper);font-size:16px}
.brand--footer .brand-mark{border-color:var(--paper)}
.footer-about{
  margin-top:16px;
  font-size:13.5px;
  line-height:1.85;
  color:rgba(250,248,245,.6);
  max-width:26em;
}
.footer-col h4{
  font-size:13px;
  font-weight:700;
  letter-spacing:1.4px;
  color:rgba(250,248,245,.9);
  margin-bottom:16px;
}
.footer-col li + li{margin-top:10px}
.footer-col a{
  font-size:14px;
  color:rgba(250,248,245,.66);
  transition:color .18s ease;
}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px;
  padding-top:22px;
  font-size:13px;
  color:rgba(250,248,245,.48);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  :root{--gap-section:80px}
}
@media (max-width:991.98px){
  .wrap{padding:0 24px}
  :root{--gap-section:68px}
  .nav-toggle{
    display:inline-flex;
    flex-direction:column;
    justify-content:center;
    gap:5px;
    width:42px;height:42px;
    padding:0;
    background:none;
    border:0;
    cursor:pointer;
  }
  .nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px}
  .nav-links{
    position:fixed;
    inset:0;
    z-index:80;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    padding:92px 26px 36px;
    margin:0;
    background:var(--paper);
    transform:translateX(101%);
    transition:transform .26s ease;
    overflow-y:auto;
  }
  .nav-links.is-open{transform:translateX(0)}
  .nav-link{
    font-size:20px;
    font-weight:600;
    padding:18px 0;
    border-bottom:1px solid var(--rule);
  }
  .nav-link::after{display:none}
  .nav-link.is-active{color:var(--accent)}
  .nav-close{
    display:block;
    position:absolute;
    top:20px;right:22px;
    width:42px;height:42px;
    background:none;
    border:0;
    font-size:28px;
    line-height:1;
    color:var(--ink);
    cursor:pointer;
  }
  .page-hero__inner{flex-direction:column;align-items:flex-start;gap:22px}
  .hero-tags{padding-bottom:0}
  .range-split{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .stat-strip__inner{grid-template-columns:1fr;gap:14px}
}
@media (max-width:767.98px){
  :root{--gap-section:56px}
  .wrap{padding:0 20px}
  body{font-size:15.5px}
  .nav-inner{height:66px}
  .brand{font-size:15.5px}
  .page-hero{min-height:0;padding:34px 0 28px}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:32px}
  .tl-item{grid-template-columns:1fr;gap:10px;padding:24px 0}
  .tl-item::before{left:-12px}
  .tl-tag{padding-top:0}
  .tl-body h3{font-size:19px}
  .cta-line{flex-direction:column;align-items:flex-start;gap:20px;padding:30px 0}
  .cta-line .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .faq-q{font-size:16px;padding:20px 0}
  .faq-a p{padding-right:0}
}
@media (max-width:575.98px){
  .page-hero h1{font-size:26px}
  .range-row{grid-template-columns:36px 1fr;gap:14px}
  .btn{width:100%}
  .nav-side .btn{width:auto}
}

/* roulang page: category2 */
:root{
  --ink:#14181C;
  --paper:#FAF8F5;
  --card:#FFFFFF;
  --accent:#D7263D;
  --accent-dark:#B41E32;
  --lime:#C6F24E;
  --muted:#6B7280;
  --rule:rgba(20,24,28,.12);
  --rule-soft:rgba(20,24,28,.07);
  --radius:10px;
  --radius-sm:8px;
  --shadow:0 2px 0 rgba(20,24,28,.06);
  --font:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --ease:180ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--accent)}
button{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.2;letter-spacing:-.4px}
h2{font-size:clamp(24px,2.4vw,32px);font-weight:700;letter-spacing:-.3px}
h3{font-size:20px;font-weight:600;letter-spacing:-.2px}
h4{font-size:15px;font-weight:700;letter-spacing:0}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
::selection{background:var(--lime);color:var(--ink)}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}

.wrap{max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:88px 0}
.section--tight{padding:64px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head p{margin:10px 0 0;color:var(--muted);font-size:15px;max-width:60ch}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);font-weight:600;margin-bottom:16px;
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--lime);display:inline-block}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-sm);
  border:1px solid transparent;background:transparent;
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease);
  white-space:nowrap;
}
.btn--accent{background:var(--accent);color:#fff}
.btn--accent:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px)}
.btn--dark{background:var(--ink);color:var(--paper)}
.btn--dark:hover{background:#000;color:var(--paper);transform:translateY(-1px)}
.btn--ghost{border-color:var(--ink);color:var(--ink)}
.btn--ghost:hover{background:var(--ink);color:var(--paper)}
.btn--ghost-light{border-color:rgba(250,248,245,.45);color:var(--paper)}
.btn--ghost-light:hover{background:var(--paper);color:var(--ink);border-color:var(--paper)}
.btn--sm{padding:9px 16px;font-size:14px}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--rule);padding-bottom:2px;
}
.btn-link:hover{color:var(--accent);border-color:var(--accent)}
.btn-link .arrow{transition:transform var(--ease)}
.btn-link:hover .arrow{transform:translateX(3px)}

/* ---------- 导航 ---------- */
.nav-bar{
  position:sticky;top:0;z-index:80;
  background:rgba(250,248,245,.94);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--rule);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:76px;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.3px}
.brand-mark{
  width:18px;height:18px;border:2px solid var(--accent);border-radius:50%;
  position:relative;flex:none;
}
.brand-mark::after{
  content:"";position:absolute;right:-2px;bottom:-2px;
  width:7px;height:7px;border-radius:2px;background:var(--lime);
}
.brand-text{font-size:17px}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--ink);
  padding:6px 0;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--accent);transition:width var(--ease);
}
.nav-link:hover::after{width:100%}
.nav-link.is-active{font-weight:700}
.nav-link.is-active::after{width:100%}
.nav-side{display:flex;align-items:center;gap:14px}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:40px;height:40px;border:1px solid var(--rule);border-radius:var(--radius-sm);
  background:transparent;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);margin:0 auto}
.nav-close{
  display:none;position:absolute;top:18px;right:22px;
  width:40px;height:40px;border:1px solid var(--rule);border-radius:var(--radius-sm);
  background:transparent;font-size:22px;line-height:1;cursor:pointer;
}

/* ---------- 页头 ---------- */
.cat-hero{padding:56px 0 72px;border-bottom:1px solid var(--rule)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:22px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--accent)}
.crumbs span.sep{opacity:.5}
.crumbs .current{color:var(--ink);font-weight:600}
.cat-hero h1{
  font-size:clamp(28px,3.6vw,46px);
  font-weight:800;letter-spacing:-.6px;line-height:1.16;
  margin-bottom:18px;
}
.cat-hero h1 em{font-style:normal;color:var(--accent)}
.lede{font-size:18px;font-weight:500;color:var(--ink);margin-bottom:14px;max-width:34ch}
.hero-desc{color:var(--muted);font-size:15.5px;max-width:56ch;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:16px;
  border-top:1px solid var(--rule);padding-top:20px;
}
.hero-stats .stat strong{
  display:block;font-family:var(--mono);font-size:24px;font-weight:700;color:var(--accent);letter-spacing:-.5px;
}
.hero-stats .stat span{display:block;font-size:12.5px;color:var(--muted);margin-top:2px}
.hero-figure{margin:0}
.figure-frame{
  position:relative;border-radius:var(--radius);overflow:hidden;
  aspect-ratio:4/3;background:var(--ink);border:1px solid var(--rule);
}
.figure-frame img{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(.88) contrast(1.02);
  transition:transform 220ms ease,filter 220ms ease;
}
.figure-frame::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(20,24,28,.38),rgba(20,24,28,.14));
  pointer-events:none;
}
.hero-figure:hover .figure-frame img{transform:scale(1.02);filter:saturate(1) contrast(1.04)}
.hero-figure figcaption{
  font-size:13px;color:var(--muted);margin-top:12px;line-height:1.7;
}

/* ---------- 分组卡片 ---------- */
.groups-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.group-card{
  background:var(--card);border:1px solid var(--rule);border-radius:var(--radius);
  padding:30px 30px 26px;box-shadow:var(--shadow);
  display:flex;flex-direction:column;
  transition:transform var(--ease),border-color var(--ease);
}
.group-card:hover{transform:translateY(-2px);border-color:var(--accent)}
.group-card .idx{
  font-family:var(--mono);font-size:13px;font-weight:700;color:var(--accent);
  letter-spacing:.08em;margin-bottom:12px;display:block;
}
.group-card h3{margin-bottom:10px;font-size:21px}
.group-card .card-desc{color:var(--muted);font-size:15px;margin-bottom:18px}
.points{margin-bottom:22px;display:grid;gap:9px}
.points li{position:relative;padding-left:18px;font-size:14.5px;color:var(--ink)}
.points li::before{
  content:"";position:absolute;left:0;top:.62em;
  width:8px;height:8px;border-radius:2px;background:var(--lime);
}
.group-card .card-foot{margin-top:auto}

/* ---------- 流程条 ---------- */
.flow-strip{border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);padding:44px 0;background:#fff}
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.flow-item{position:relative;padding:0 26px}
.flow-item:first-child{padding-left:0}
.flow-item:last-child{padding-right:0}
.flow-item + .flow-item::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;
  border-left:1px dashed var(--rule);
}
.flow-item .num{
  font-family:var(--mono);font-size:20px;font-weight:700;color:var(--accent);
  display:block;margin-bottom:8px;letter-spacing:.06em;
}
.flow-item h3{font-size:16px;font-weight:700;margin-bottom:6px}
.flow-item p{font-size:13.5px;color:var(--muted);margin:0;line-height:1.7}

/* ---------- 说明区 ---------- */
.notes-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:32px;align-items:start}
.notes-copy{grid-column:1 / span 8}
.notes-copy h2{margin-bottom:20px}
.notes-copy p{color:#2c3238;font-size:16px;line-height:1.85;max-width:74ch}
.notes-copy .sub-rule{
  display:block;width:44px;height:3px;background:var(--accent);margin:32px 0 22px;border-radius:2px;
}
.notes-aside{grid-column:9 / span 4}
.aside-card{
  border:1px solid var(--rule);border-radius:var(--radius);background:var(--card);
  padding:22px;box-shadow:var(--shadow);
}
.aside-card h3{font-size:15px;margin-bottom:12px;letter-spacing:0}
.aside-list{display:grid;gap:12px}
.aside-list li{
  display:flex;justify-content:space-between;gap:12px;font-size:13.5px;color:var(--muted);
  border-bottom:1px solid var(--rule-soft);padding-bottom:10px;
}
.aside-list li:last-child{border-bottom:0;padding-bottom:0}
.aside-list b{color:var(--ink);font-weight:600}
.aside-list .mono{font-family:var(--mono);color:var(--accent)}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px}
.faq-list{border-top:1px solid var(--rule)}
.faq-item{border-bottom:1px solid var(--rule)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  background:transparent;border:0;text-align:left;
  padding:22px 0;font-size:17px;font-weight:600;cursor:pointer;
  transition:color var(--ease);
}
.faq-q:hover{color:var(--accent)}
.faq-icon{position:relative;width:16px;height:16px;flex:none}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--ink);transition:transform var(--ease),background var(--ease);
}
.faq-icon::before{left:0;top:7px;width:16px;height:2px}
.faq-icon::after{left:7px;top:0;width:2px;height:16px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0)}
.faq-item.is-open .faq-q{color:var(--accent)}
.faq-item.is-open .faq-icon::before{background:var(--accent)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 220ms ease}
.faq-a p{padding:0 0 22px;color:#333a41;font-size:15px;line-height:1.85;max-width:70ch;margin:0}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;background:var(--ink);color:var(--paper);
  padding:64px 0;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  opacity:.16;filter:grayscale(1);
}
.cta-band .wrap{position:relative;z-index:1}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px}
.cta-inner h2{color:var(--paper);margin-bottom:12px;max-width:22ch}
.cta-inner p{color:rgba(250,248,245,.66);font-size:14.5px;margin:0;max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;flex:none}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(250,248,245,.78);padding:64px 0 28px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(250,248,245,.14)}
.brand--footer{color:var(--paper);margin-bottom:16px}
.brand--footer .brand-text{font-size:17px}
.footer-about{color:rgba(250,248,245,.6);font-size:13.5px;line-height:1.8;max-width:40ch;margin:0}
.footer-col h4{color:var(--paper);font-size:14px;margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:grid;gap:10px}
.footer-col a{color:rgba(250,248,245,.72);font-size:13.5px}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;padding-top:24px;font-size:12.5px;color:rgba(250,248,245,.5)}
.footer-bottom p{margin:0}

/* ---------- 响应式 ---------- */
@media (max-width:991px){
  .wrap{padding:0 24px}
  .section{padding:64px 0}
  .nav-toggle{display:flex}
  .nav-close{display:block}
  .nav-links{
    position:fixed;inset:0;z-index:120;
    background:var(--paper);
    flex-direction:column;align-items:flex-start;justify-content:flex-start;
    gap:0;padding:88px 28px 40px;
    transform:translateX(100%);transition:transform 200ms ease;
    overflow-y:auto;
  }
  .nav-links.is-open{transform:translateX(0)}
  .nav-link{width:100%;font-size:22px;font-weight:600;padding:20px 0;border-bottom:1px solid var(--rule)}
  .nav-link::after{display:none}
  .nav-link.is-active{color:var(--accent)}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .figure-frame{aspect-ratio:16/9}
  .groups-grid{grid-template-columns:1fr}
  .notes-copy{grid-column:1 / -1}
  .notes-aside{grid-column:1 / -1}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:26px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .section{padding:56px 0}
  .cat-hero{padding:36px 0 56px}
  .nav-cta{display:none}
  .flow-grid{grid-template-columns:1fr 1fr;row-gap:28px}
  .flow-item{padding:0 18px}
  .flow-item:first-child{padding-left:0}
  .flow-item:nth-child(odd){padding-left:0}
  .flow-item:nth-child(odd)::before{display:none}
  .hero-stats{grid-template-columns:1fr;gap:12px}
  .hero-stats .stat{display:flex;align-items:baseline;gap:10px}
  .hero-stats .stat span{margin-top:0}
  .footer-grid{grid-template-columns:1fr}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
}
@media (max-width:520px){
  .wrap{padding:0 20px}
  .group-card{padding:24px 20px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .btn{padding:11px 18px;font-size:14px}
  .hero-actions .btn{width:100%}
  .flow-grid{grid-template-columns:1fr}
  .flow-item{padding:0 0 0 16px;border-left:1px dashed var(--rule)}
  .flow-item::before{display:none}
}