/* roulang page: index */
:root{
  --paper:#F7F5F1;
  --surface:#FFFFFF;
  --ink:#14171A;
  --ink-2:#5C6166;
  --ink-3:#8A8F94;
  --line:#E3DFD7;
  --lime:#C8F04B;
  --lime-ink:#6E8B12;
  --sand:#EDE8DE;
  --radius:6px;
  --radius-btn:4px;
  --radius-badge:2px;
  --shadow-1:0 1px 2px rgba(20,23,26,.06);
  --shadow-2:0 12px 30px -14px rgba(20,23,26,.18);
  --container:1240px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --sans:"Noto Sans SC","Source Han Sans SC",-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;padding:0;background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.9;font-weight:400;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:0;list-style:none;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
img{max-width:100%;display:block;border-radius:var(--radius);}
button{font-family:inherit;font-size:inherit;color:inherit;border:0;background:none;cursor:pointer;}
input,textarea,select{font-family:inherit;}
:focus-visible{outline:2px solid var(--lime-ink);outline-offset:3px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;}
.eyebrow{
  font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--ink-3);
  text-transform:uppercase;margin-bottom:16px;display:flex;align-items:center;gap:10px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--ink-3);display:inline-block;}

/* ---------- buttons ---------- */
.btn{
  position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;overflow:hidden;isolation:isolate;
  transition:color .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.btn::before{
  content:"";position:absolute;inset:0;background:var(--lime);
  transform:translateX(-101%);transition:transform .3s var(--ease);z-index:-1;
}
.btn:hover::before{transform:translateX(0);}
.btn .arrow{transition:transform .22s var(--ease);font-family:var(--mono);}
.btn:hover .arrow{transform:translateX(3px);}
.btn-primary{background:var(--ink);color:#fff;}
.btn-primary:hover{color:var(--ink);}
.btn-ghost{border:1px solid var(--ink);color:var(--ink);background:transparent;}
.btn-ghost::before{background:var(--sand);}
.btn-ghost:hover{color:var(--ink);}
.btn-lime{background:var(--lime);color:var(--ink);}
.btn-lime::before{background:#fff;}
.btn-lime:hover{color:var(--ink);}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
  border-bottom:1px solid transparent;padding-bottom:2px;transition:border-color .22s var(--ease),color .22s var(--ease);
}
.link-arrow:hover{border-bottom-color:var(--ink);}
.link-arrow .arrow{font-family:var(--mono);transition:transform .22s var(--ease);}
.link-arrow:hover .arrow{transform:translateX(3px);}

/* ---------- badges ---------- */
.badge{
  display:inline-block;font-size:12px;letter-spacing:.06em;padding:3px 9px;
  border-radius:var(--radius-badge);background:var(--sand);color:var(--ink);line-height:1.7;
}
.badge-lime{background:var(--lime);color:var(--ink);}
.badge-mono{
  font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--ink-2);
  border:1px solid var(--line);padding:4px 8px;border-radius:var(--radius-badge);line-height:1.6;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:90;background:var(--surface);
  border-bottom:1px solid var(--line);transition:box-shadow .25s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 8px 22px -18px rgba(20,23,26,.5);}
.nav-wrap{
  max-width:var(--container);margin:0 auto;padding:0 24px;height:72px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:19px;line-height:1;white-space:nowrap;}
.brand-mark{width:8px;height:8px;background:var(--lime);display:inline-block;flex:none;}
.brand b{font-weight:900;letter-spacing:-.01em;}
.brand em{font-style:normal;font-weight:400;color:var(--ink-2);}
.nav-links{display:flex;align-items:center;gap:26px;}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;min-height:44px;
  font-size:15px;color:var(--ink-2);padding:0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:12px;height:2px;width:0;
  background:var(--lime);transition:width .24s var(--ease);
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after{width:100%;}
.nav-links a.is-active{color:var(--ink);font-weight:600;}
.nav-links a.is-active::after{width:100%;background:var(--ink);}
.nav-links a.is-active:hover::after{background:var(--ink);}
.nav-right{display:flex;align-items:center;gap:12px;}
.menu-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--radius-btn);background:var(--surface);
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative;}
.menu-toggle span::before,.menu-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);transition:transform .22s var(--ease),top .22s var(--ease);
}
.menu-toggle span::before{top:-6px;}
.menu-toggle span::after{top:6px;}
body.menu-open .menu-toggle span{background:transparent;}
body.menu-open .menu-toggle span::before{top:0;transform:rotate(45deg);}
body.menu-open .menu-toggle span::after{top:0;transform:rotate(-45deg);}
.mobile-panel{
  display:none;position:fixed;left:0;right:0;top:72px;bottom:0;background:var(--surface);
  z-index:80;padding:8px 24px 24px;overflow-y:auto;flex-direction:column;
}
body.menu-open .mobile-panel{display:flex;}
body.menu-open{overflow:hidden;}
.mobile-panel a.m-item{
  display:flex;align-items:center;justify-content:space-between;
  min-height:56px;border-bottom:1px solid var(--line);font-size:16px;color:var(--ink);
}
.mobile-panel a.m-item .arrow{font-family:var(--mono);color:var(--ink-3);}
.mobile-panel .m-cta{margin-top:24px;}
.mobile-panel .m-cta .btn{width:100%;}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:88px 0 0;background:var(--paper);}
.hero-watermark{
  position:absolute;top:-40px;right:-30px;font-size:clamp(120px,17vw,250px);font-weight:900;
  line-height:.9;letter-spacing:-.04em;color:transparent;-webkit-text-stroke:1px rgba(20,23,26,.07);
  opacity:.9;pointer-events:none;user-select:none;white-space:nowrap;
}
.hero-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:52px;align-items:end;}
.hero-copy{position:relative;z-index:2;padding-bottom:8px;}
.hero-copy > *{animation:rise .48s var(--ease) both;}
.hero-copy > *:nth-child(1){animation-delay:.04s;}
.hero-copy > *:nth-child(2){animation-delay:.1s;}
.hero-copy > *:nth-child(3){animation-delay:.16s;}
.hero-copy > *:nth-child(4){animation-delay:.22s;}
@keyframes rise{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:none;}}
.hero h1{
  font-size:clamp(34px,5.4vw,80px);line-height:1.06;font-weight:900;letter-spacing:-.02em;
  margin-bottom:22px;max-width:14em;
}
.hl{background:linear-gradient(transparent 66%,rgba(200,240,75,.72) 66%);padding:0 .06em;}
.hero-sub{font-size:17px;line-height:1.9;color:var(--ink-2);max-width:32em;margin-bottom:32px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;}
.hero-media{position:relative;z-index:1;aspect-ratio:4/5;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-1);background:var(--sand);}
.hero-media img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.hero-tag{
  position:absolute;right:12px;bottom:12px;background:rgba(255,255,255,.94);
  font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--ink);
  padding:5px 10px;border-radius:var(--radius-badge);
}
.trust-bar{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  border-top:1px solid var(--line);margin-top:64px;padding:26px 0 30px;
}
.trust-item{display:flex;align-items:baseline;gap:12px;}
.trust-num{font-family:var(--mono);font-size:24px;font-weight:700;letter-spacing:-.02em;}
.trust-txt{font-size:14px;color:var(--ink-2);line-height:1.7;}

/* ---------- sections ---------- */
.section{padding:104px 0;}
.section-alt{background:var(--sand);}
.section-head{max-width:720px;margin-bottom:56px;}
.section-head h2{font-size:clamp(28px,3.4vw,42px);line-height:1.2;font-weight:700;letter-spacing:-.01em;}
.section-note{font-size:15.5px;color:var(--ink-2);line-height:1.9;margin-top:16px;}

/* ---------- steps ---------- */
.steps-layout{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start;}
.steps-head{position:sticky;top:104px;}
.steps-head h2{font-size:clamp(28px,3.2vw,40px);line-height:1.2;font-weight:700;margin-bottom:16px;letter-spacing:-.01em;}
.step-list{border-left:1px solid var(--line);}
.step{position:relative;padding:0 0 52px 40px;}
.step:last-child{padding-bottom:0;}
.step-num{
  font-family:var(--mono);font-size:42px;font-weight:700;line-height:1;
  color:var(--ink-3);margin-bottom:14px;transition:color .22s var(--ease);
}
.step:hover .step-num{color:var(--lime-ink);}
.step h3{font-size:22px;font-weight:600;margin-bottom:10px;}
.step p{font-size:15.5px;color:var(--ink-2);line-height:1.9;max-width:44em;}

/* ---------- scenes ---------- */
.scene-list{border-top:1px solid var(--line);}
.scene-item{
  display:grid;grid-template-columns:90px 260px 1fr;gap:32px;align-items:baseline;
  padding:32px 0;border-bottom:1px solid var(--line);transition:background-color .22s var(--ease);
}
.scene-item:hover{background:rgba(255,255,255,.55);}
.scene-num{font-family:var(--mono);font-size:15px;font-weight:700;color:var(--ink-3);letter-spacing:.06em;}
.scene-item h3{font-size:20px;font-weight:600;}
.scene-item p{font-size:15.5px;color:var(--ink-2);line-height:1.9;}

/* ---------- stats ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:32px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:40px 32px;margin-bottom:40px;
}
.stat-num{font-family:var(--mono);font-size:clamp(32px,4vw,46px);font-weight:700;line-height:1;letter-spacing:-.02em;}
.stat-num em{font-style:normal;font-size:16px;font-weight:400;color:var(--ink-2);margin-left:4px;letter-spacing:0;}
.stat-label{font-size:14px;color:var(--ink-2);margin-top:12px;line-height:1.7;}

/* ---------- case cards ---------- */
.case-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:start;}
.case-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:0;overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.case-card:hover{transform:translateY(-2px);border-color:var(--ink);box-shadow:var(--shadow-2);}
.case-card .case-media{aspect-ratio:16/9;overflow:hidden;background:var(--sand);}
.case-card .case-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .4s var(--ease);}
.case-card:hover .case-media img{transform:scale(1.03);}
.case-body{padding:28px 32px 32px;}
.case-body h3{font-size:22px;font-weight:600;line-height:1.4;margin-bottom:12px;}
.case-body p{font-size:15.5px;color:var(--ink-2);line-height:1.9;}
.case-meta{display:flex;align-items:center;gap:12px;margin-bottom:16px;flex-wrap:wrap;}
.case-meta time{font-family:var(--mono);font-size:12px;color:var(--ink-3);letter-spacing:.04em;}
.case-quote{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:36px 32px;box-shadow:var(--shadow-1);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.case-quote:hover{transform:translateY(-2px);border-color:var(--ink);box-shadow:var(--shadow-2);}
.quote-mark{border-left:3px solid var(--lime);padding-left:20px;}
.quote-mark p{font-size:19px;line-height:1.8;font-weight:500;}
.quote-by{font-family:var(--mono);font-size:12px;color:var(--ink-3);margin-top:20px;letter-spacing:.04em;}
.case-quote .case-body{padding:0;}

/* ---------- faq ---------- */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start;}
.faq-head h2{font-size:clamp(28px,3.2vw,40px);line-height:1.2;font-weight:700;margin-bottom:16px;letter-spacing:-.01em;}
.faq-head p{font-size:15.5px;color:var(--ink-2);line-height:1.9;}
.faq-item{border-top:1px solid var(--line);}
.faq-item:last-child{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:44px;padding:20px 0;text-align:left;font-size:17px;font-weight:600;line-height:1.6;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--lime-ink);}
.faq-icon{font-family:var(--mono);font-size:20px;color:var(--ink-3);flex:none;transition:transform .24s var(--ease),color .24s var(--ease);}
.faq-item.is-open .faq-icon{color:var(--ink);transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease);}
.faq-a p{padding:0 40px 22px 0;font-size:15.5px;color:var(--ink-2);line-height:1.9;}

/* ---------- news ---------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.news-head h2{font-size:clamp(28px,3.2vw,40px);line-height:1.2;font-weight:700;letter-spacing:-.01em;}
.news-layout{display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:start;}
.news-main{
  display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.news-main:hover{transform:translateY(-2px);border-color:var(--ink);box-shadow:var(--shadow-2);}
.news-main-media{aspect-ratio:16/9;overflow:hidden;background:var(--sand);}
.news-main-media img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.news-main-body{padding:28px 32px 32px;}
.news-main-body h3{font-size:24px;font-weight:600;line-height:1.45;margin:14px 0 12px;}
.news-main-body p{
  font-size:15.5px;color:var(--ink-2);line-height:1.9;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{display:flex;align-items:center;gap:12px;margin-top:18px;flex-wrap:wrap;}
.news-meta time{font-family:var(--mono);font-size:12px;color:var(--ink-3);letter-spacing:.04em;}
.news-side{border-top:1px solid var(--line);}
.news-side-item{
  display:block;padding:20px 0;border-bottom:1px solid var(--line);
  transition:background-color .2s var(--ease),padding-left .2s var(--ease);
}
.news-side-item:hover{padding-left:6px;}
.news-side-item h4{font-size:16px;font-weight:600;line-height:1.6;margin-bottom:8px;}
.news-side-item:hover h4{color:var(--lime-ink);}
.news-side-meta{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--ink-3);}
.news-side-meta time{font-family:var(--mono);letter-spacing:.04em;}
.empty-state{
  border-top:1px dashed var(--line);padding:56px 24px;text-align:center;
  color:var(--ink-3);font-size:15px;
}

/* ---------- cta ---------- */
.cta-section{padding:0 0 104px;}
.cta-band{
  background:var(--ink);color:#F5F3EE;border-radius:var(--radius);
  padding:56px 48px;display:grid;grid-template-columns:1fr auto;gap:36px;align-items:center;
}
.cta-band h2{font-size:clamp(26px,3.2vw,38px);line-height:1.25;font-weight:700;margin-bottom:12px;letter-spacing:-.01em;}
.cta-band p{font-size:15.5px;color:rgba(245,243,238,.72);line-height:1.9;max-width:38em;}
.cta-foot{
  grid-column:1 / -1;border-top:1px solid rgba(255,255,255,.14);padding-top:20px;
  font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:rgba(245,243,238,.55);
}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#F5F3EE;padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:2.1fr 1fr 1fr 1.3fr;gap:0;}
.footer-col{padding:0 32px;border-left:1px solid rgba(255,255,255,.12);}
.footer-col:first-child{border-left:0;padding-left:0;}
.footer-col:last-child{padding-right:0;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;line-height:1;margin-bottom:18px;}
.footer-brand .brand-mark{background:var(--lime);}
.footer-brand b{font-weight:900;}
.footer-brand em{font-style:normal;font-weight:400;color:rgba(245,243,238,.7);}
.footer-desc{font-size:14px;line-height:1.9;color:rgba(245,243,238,.66);margin-bottom:18px;max-width:24em;}
.footer-contact{font-family:var(--mono);font-size:12px;letter-spacing:.05em;color:rgba(245,243,238,.55);line-height:2;}
.footer-title{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:rgba(245,243,238,.5);margin-bottom:18px;}
.footer-links li{margin-bottom:10px;}
.footer-links a{font-size:14px;color:rgba(245,243,238,.78);border-bottom:1px solid transparent;padding-bottom:1px;transition:color .2s var(--ease),border-color .2s var(--ease);}
.footer-links a:hover{color:#fff;border-bottom-color:var(--lime);}
.footer-note{font-size:13.5px;line-height:1.9;color:rgba(245,243,238,.6);}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 26px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-family:var(--mono);font-size:12px;letter-spacing:.04em;color:rgba(245,243,238,.5);
}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .hero h1{font-size:clamp(34px,4.6vw,64px);}
  .hero-grid{gap:40px;}
}
@media (max-width:1023px){
  .nav-links,.nav-right .btn,.nav-right .badge-mono{display:none;}
  .menu-toggle{display:inline-flex;}
  .section{padding:72px 0;}
  .hero{padding-top:64px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;align-items:start;}
  .hero-media{aspect-ratio:16/10;width:100%;}
  .hero h1{font-size:clamp(32px,6.4vw,52px);max-width:none;}
  .hero-sub{font-size:16px;}
  .trust-bar{margin-top:44px;grid-template-columns:1fr;gap:16px;padding:22px 0 26px;}
  .trust-item{justify-content:flex-start;}
  .steps-layout,.faq-layout{grid-template-columns:1fr;gap:32px;}
  .steps-head,.faq-head{position:static;}
  .scene-item{grid-template-columns:64px 1fr;gap:12px 20px;}
  .scene-item p{grid-column:2;}
  .stats{grid-template-columns:repeat(2,1fr);gap:28px;padding:32px 24px;}
  .case-grid{grid-template-columns:1fr;}
  .news-layout{grid-template-columns:1fr;}
  .cta-band{grid-template-columns:1fr;padding:40px 28px;gap:24px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-col{padding:0 0 0 24px;margin-bottom:32px;}
  .footer-col:nth-child(odd){border-left:0;padding-left:0;}
  .cta-section{padding-bottom:72px;}
}
@media (max-width:639px){
  .container{padding:0 18px;}
  .nav-wrap{padding:0 18px;height:64px;}
  .brand{font-size:17px;}
  .mobile-panel{top:64px;}
  .hero{padding-top:48px;}
  .hero h1{font-size:clamp(30px,8.4vw,40px);line-height:1.12;}
  .hero-sub{font-size:15.5px;margin-bottom:26px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .hero-media{aspect-ratio:4/3;}
  .hero-watermark{font-size:130px;top:-10px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:32px;}
  .step-num{font-size:34px;}
  .step{padding:0 0 40px 26px;}
  .step h3{font-size:19px;}
  .scene-item{grid-template-columns:1fr;gap:8px;}
  .scene-item p{grid-column:1;}
  .scene-num{font-size:13px;}
  .stats{grid-template-columns:1fr 1fr;gap:22px 16px;padding:26px 18px;}
  .stat-num{font-size:30px;}
  .case-body{padding:22px 20px 26px;}
  .case-quote{padding:26px 20px;}
  .news-main-body{padding:22px 20px 26px;}
  .news-main-body h3{font-size:19px;}
  .quote-mark p{font-size:17px;}
  .cta-band{padding:32px 22px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-col{padding-left:0;border-left:0;border-top:1px solid rgba(255,255,255,.12);padding-top:26px;}
  .footer-col:first-child{border-top:0;padding-top:0;}
  .footer-bottom{flex-direction:column;gap:8px;margin-top:36px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:color .2s,background-color .2s,border-color .2s !important;}
  html{scroll-behavior:auto;}
  .hero-copy > *{opacity:1;transform:none;}
}

/* roulang page: category1 */
:root{
  --paper:#F7F5F1;
  --surface:#FFFFFF;
  --ink:#14171A;
  --ink-2:#5C6166;
  --ink-3:#8A8F94;
  --line:#E3DFD7;
  --lime:#C8F04B;
  --lime-text:#6E8B12;
  --sand:#EDE8DE;
  --radius-card:6px;
  --radius-btn:4px;
  --radius-badge:2px;
  --shadow-1:0 1px 2px rgba(20,23,26,.06);
  --shadow-2:0 12px 30px -14px rgba(20,23,26,.18);
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --container:1240px;
  --pad-x:32px;
}
*,*::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;
  font-weight:400;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;border-radius:var(--radius-card)}
a{color:inherit;text-decoration:none}
button{font:inherit;border:0;background:none;cursor:pointer;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.2;letter-spacing:-.01em}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--pad-x)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 22px -18px rgba(20,23,26,.45)}
.nav-inner{
  height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  font-size:19px;line-height:1;color:var(--ink);letter-spacing:-.01em;
}
.brand-mark{width:8px;height:8px;background:var(--lime);display:inline-block;flex:0 0 auto}
.brand b{font-weight:900}
.brand em{font-style:normal;font-weight:400;color:var(--ink)}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{
  position:relative;display:inline-block;padding:6px 0;
  font-size:15px;color:var(--ink-2);transition:color .2s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;
  background:var(--lime);transition:right .22s cubic-bezier(.2,.7,.2,1);
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{right:0}
.nav-links a.is-active{color:var(--ink);font-weight:700}
.nav-links a.is-active::after{right:0;background:var(--ink)}
.nav-right{display:flex;align-items:center;gap:14px}
.nav-badge{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:var(--ink-2);border:1px solid var(--line);border-radius:var(--radius-badge);
  padding:3px 7px;white-space:nowrap;
}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:var(--surface);
}
.nav-toggle span{display:block;width:18px;height:1.5px;background:var(--ink);position:relative;transition:transform .2s ease,opacity .2s ease}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:1.5px;background:var(--ink);transition:transform .2s ease;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle.is-open span{background:transparent}
.nav-toggle.is-open span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle.is-open span::after{transform:translateY(-6px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 28px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;position:relative;overflow:hidden;
  transition:color .24s ease,border-color .24s ease,background-color .24s ease;
  white-space:nowrap;
}
.btn>*{position:relative;z-index:1}
.btn .arrow{transition:transform .22s cubic-bezier(.2,.7,.2,1);font-style:normal}
.btn:hover .arrow{transform:translateX(3px)}
.btn-primary{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn-primary::before{
  content:"";position:absolute;inset:0;background:var(--lime);
  transform:translateX(-101%);transition:transform .3s cubic-bezier(.2,.7,.2,1);z-index:0;
}
.btn-primary:hover{color:var(--ink)}
.btn-primary:hover::before{transform:translateX(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--sand)}
.btn-lime{background:var(--lime);color:var(--ink);border-color:var(--lime)}
.btn-lime::before{
  content:"";position:absolute;inset:0;background:var(--ink);
  transform:translateX(-101%);transition:transform .3s cubic-bezier(.2,.7,.2,1);z-index:0;
}
.btn-lime:hover{color:#fff}
.btn-lime:hover::before{transform:translateX(0)}
.btn-sm{height:44px;padding:0 22px;font-size:14px}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;
  color:var(--ink);position:relative;padding-bottom:2px;
}
.link-arrow::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:1px;background:var(--ink);
  transition:right .24s cubic-bezier(.2,.7,.2,1);
}
.link-arrow:hover::after{right:0}
.link-arrow .arrow{font-style:normal;transition:transform .22s ease}
.link-arrow:hover .arrow{transform:translateX(3px)}

/* ---------- 移动面板 ---------- */
.mobile-panel{
  position:fixed;top:72px;left:0;right:0;bottom:0;z-index:79;
  background:var(--surface);border-top:1px solid var(--line);
  overflow-y:auto;padding:8px 0 24px;display:none;
}
.mobile-panel.is-open{display:block}
.mobile-links a{
  display:flex;align-items:center;justify-content:space-between;
  height:56px;padding:0 24px;font-size:16px;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.mobile-links a::after{content:"›";color:var(--ink-3);font-size:20px;line-height:1}
.mobile-links a.is-active{font-weight:700;box-shadow:inset 2px 0 0 var(--ink)}
.mobile-cta{margin:20px 24px 0;width:calc(100% - 48px)}

/* ---------- 标题横条 ---------- */
.page-band{
  background:var(--surface);
  border-bottom:1px solid var(--line);
  padding:52px 0 48px;
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-3);margin-bottom:22px;
}
.breadcrumb a{color:var(--ink-3);transition:color .2s ease}
.breadcrumb a:hover{color:var(--ink)}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .current{color:var(--ink-2)}
.band-head{
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:32px;align-items:end;
}
.band-title{
  font-size:clamp(34px,4.2vw,58px);
  line-height:1.08;font-weight:900;letter-spacing:-.02em;
  margin-bottom:16px;
}
.band-title .mark{
  position:relative;display:inline-block;z-index:0;
}
.band-title .mark::after{
  content:"";position:absolute;left:0;right:0;bottom:.12em;height:2px;background:var(--lime);z-index:-1;
}
.band-sub{font-size:17px;color:var(--ink-2);max-width:640px;line-height:1.85}
.band-meta{
  display:flex;flex-direction:column;gap:6px;text-align:right;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--ink-3);
}
.band-meta strong{color:var(--ink);font-weight:700;font-size:13px}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section--alt{background:var(--sand)}
.section-head{margin-bottom:48px;max-width:720px}
.eyebrow{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--lime-text);margin-bottom:12px;
}
.section-title{font-size:clamp(26px,3vw,38px);line-height:1.2;letter-spacing:-.02em}
.section-lead{margin-top:14px;color:var(--ink-2);font-size:16px;line-height:1.85}

/* ---------- 时间轴布局 ---------- */
.layout-split{
  display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:64px;align-items:start;
}
.timeline{position:relative;padding-top:6px}
.timeline::before{
  content:"";position:absolute;left:71px;top:14px;bottom:18px;width:1px;background:var(--line);
}
.step{position:relative;padding-left:96px;padding-bottom:52px}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";position:absolute;left:67px;top:14px;width:9px;height:9px;border-radius:50%;
  background:var(--lime);transition:transform .24s ease;
}
.step:hover::before{transform:scale(1.25)}
.step-num{
  position:absolute;left:0;top:2px;
  font-family:var(--font-mono);font-size:30px;font-weight:700;line-height:1;
  color:var(--ink-3);letter-spacing:-.03em;transition:color .2s ease;
}
.step:hover .step-num{color:var(--lime-text)}
.step-title{font-size:23px;line-height:1.35;margin-bottom:10px}
.step-text{color:var(--ink-2);font-size:16px;line-height:1.9;margin:0}
.step-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tag{
  display:inline-block;padding:4px 10px;border-radius:var(--radius-badge);
  background:var(--sand);color:var(--ink);font-size:12px;letter-spacing:.04em;
}

/* ---------- 摘要卡 ---------- */
.aside-card{
  position:sticky;top:96px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:30px 28px;box-shadow:var(--shadow-1);
}
.aside-kicker{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--ink-3);text-transform:uppercase;margin-bottom:10px;
}
.aside-title{font-size:21px;line-height:1.35;margin-bottom:20px}
.aside-list{border-top:1px solid var(--line)}
.aside-list li{
  display:grid;grid-template-columns:76px 1fr;gap:12px;
  padding:14px 0;border-bottom:1px solid var(--line);font-size:14px;line-height:1.7;
}
.aside-key{font-family:var(--font-mono);font-size:12px;color:var(--ink-3);letter-spacing:.04em}
.aside-val{color:var(--ink);font-weight:500}
.aside-btn{width:100%;margin-top:24px}
.aside-note{
  margin-top:14px;font-family:var(--font-mono);font-size:12px;color:var(--ink-3);letter-spacing:.03em;text-align:center;
}

/* ---------- 准备清单 ---------- */
.prep{
  display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:56px;align-items:center;
}
.prep-figure{margin:0;position:relative}
.prep-figure img{
  width:100%;height:100%;aspect-ratio:4/5;object-fit:cover;
  border:1px solid var(--line);box-shadow:var(--shadow-1);
}
.prep-figure figcaption{
  margin-top:12px;font-size:12px;color:var(--ink-3);font-family:var(--font-mono);letter-spacing:.03em;
}
.line-list{border-top:1px solid var(--line)}
.line-list li{
  display:grid;grid-template-columns:56px 1fr;gap:20px;
  padding:22px 0;border-bottom:1px solid var(--line);
}
.line-list .li-num{
  font-family:var(--font-mono);font-size:20px;font-weight:700;color:var(--ink-3);line-height:1.3;
}
.line-list .li-title{font-size:19px;font-weight:600;margin-bottom:6px;line-height:1.45}
.line-list .li-text{margin:0;color:var(--ink-2);font-size:15.5px;line-height:1.85}
.line-list .li-text strong{color:var(--ink);font-weight:600}

/* ---------- 说明两栏 ---------- */
.notes-row{display:grid;grid-template-columns:1fr 1fr;gap:56px}
.notes-cell h3{font-size:21px;margin-bottom:16px;padding-bottom:14px;border-bottom:1px solid var(--ink)}
.notes-cell p{color:var(--ink-2);font-size:16px;line-height:1.95}
.notes-list li{
  position:relative;padding-left:20px;margin-bottom:12px;color:var(--ink-2);font-size:16px;line-height:1.9;
}
.notes-list li::before{
  content:"";position:absolute;left:0;top:.8em;width:6px;height:6px;background:var(--ink);
}

/* ---------- CTA ---------- */
.cta-band{background:var(--ink);color:#F5F3EE;padding:72px 0 40px}
.cta-inner{
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:40px;align-items:center;
}
.cta-title{
  font-size:clamp(24px,3vw,34px);line-height:1.25;letter-spacing:-.02em;margin-bottom:12px;color:#fff;
}
.cta-sub{color:rgba(245,243,238,.72);font-size:16px;line-height:1.85;margin:0;max-width:620px}
.cta-foot{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:rgba(245,243,238,.5);
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#F5F3EE;padding:64px 0 28px}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:0;
}
.footer-col{padding:0 28px;border-left:1px solid rgba(255,255,255,.12)}
.footer-col:first-child{padding-left:0;border-left:0}
.footer-col:last-child{padding-right:0}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;font-size:18px;line-height:1;margin-bottom:18px;
}
.footer-brand b{font-weight:900}
.footer-brand em{font-style:normal;font-weight:400;color:rgba(245,243,238,.8)}
.footer-desc{font-size:14px;line-height:1.9;color:rgba(245,243,238,.66);margin-bottom:18px}
.footer-contact{font-family:var(--font-mono);font-size:12px;line-height:2;color:rgba(245,243,238,.5);letter-spacing:.02em}
.footer-title{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:rgba(245,243,238,.45);margin-bottom:16px;
}
.footer-links li{margin-bottom:10px}
.footer-links a{
  font-size:14px;color:rgba(245,243,238,.78);position:relative;padding-bottom:2px;
}
.footer-links a::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:1px;background:var(--lime);
  transition:right .24s cubic-bezier(.2,.7,.2,1);
}
.footer-links a:hover{color:#fff}
.footer-links a:hover::after{right:0}
.footer-note{font-size:13.5px;line-height:1.95;color:rgba(245,243,238,.6);margin:0}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between;
  font-family:var(--font-mono);font-size:12px;color:rgba(245,243,238,.45);letter-spacing:.02em;
}

/* ---------- 进场动画 ---------- */
.reveal{animation:revealUp .48s cubic-bezier(.2,.7,.2,1) both}
.reveal:nth-child(2){animation-delay:.06s}
.reveal:nth-child(3){animation-delay:.12s}
@keyframes revealUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  :root{--pad-x:28px}
  .layout-split{gap:44px;grid-template-columns:minmax(0,1fr) 320px}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-badge{display:none}
  .nav-cta{display:none}
  .nav-toggle{display:flex}
  .section{padding:72px 0}
  .layout-split{grid-template-columns:minmax(0,1fr);gap:40px}
  .aside-card{position:static}
  .prep{grid-template-columns:1fr;gap:36px}
  .prep-figure img{aspect-ratio:16/10}
  .notes-row{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px 0}
  .footer-col{padding:0 24px}
  .footer-col:nth-child(3){padding-left:0;border-left:0}
  .footer-col:nth-child(2){padding-right:0}
  .cta-inner{grid-template-columns:1fr;gap:28px;justify-items:start}
}
@media (max-width:767px){
  :root{--pad-x:20px}
  .page-band{padding:36px 0 34px}
  .band-head{grid-template-columns:1fr;gap:20px;align-items:start}
  .band-meta{text-align:left;flex-direction:row;flex-wrap:wrap;gap:6px 18px}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
  .step{padding-left:56px;padding-bottom:40px}
  .timeline::before{left:39px}
  .step::before{left:35px;top:12px}
  .step-num{font-size:20px;top:6px}
  .step-title{font-size:20px}
  .step-text{font-size:15.5px}
  .line-list li{grid-template-columns:44px 1fr;gap:14px;padding:18px 0}
  .line-list .li-title{font-size:17px}
  .aside-card{padding:24px 20px}
  .cta-band{padding:56px 0 32px}
  .site-footer{padding:52px 0 24px}
  .footer-grid{grid-template-columns:1fr;gap:0}
  .footer-col{padding:24px 0;border-left:0;border-top:1px solid rgba(255,255,255,.12)}
  .footer-col:first-child{padding-top:0;border-top:0}
  .footer-bottom{flex-direction:column;gap:8px;margin-top:32px}
  .btn{width:100%}
  .aside-btn,.mobile-cta{width:100%}
  .cta-inner .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --paper:#F7F5F1;
  --surface:#FFFFFF;
  --ink:#14171A;
  --secondary:#5C6166;
  --muted:#8A8F94;
  --line:#E3DFD7;
  --lime:#C8F04B;
  --lime-ink:#6E8B12;
  --sand:#EDE8DE;
  --footer-text:#F5F3EE;
  --radius-card:6px;
  --radius-btn:4px;
  --shadow-static:0 1px 2px rgba(20,23,26,.06);
  --shadow-hover:0 12px 30px -14px rgba(20,23,26,.18);
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{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;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit}
button{background:none;border:0}
ul,ol{margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
::selection{background:var(--lime);color:var(--ink)}
:focus-visible{outline:2px solid var(--lime-ink);outline-offset:3px}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  height:72px;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{
  box-shadow:0 10px 24px -20px rgba(20,23,26,.38);
}
.header-inner{
  height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--ink);
  font-size:20px;
  line-height:1;
  letter-spacing:-.02em;
  white-space:nowrap;
}
.brand-mark{
  width:8px;
  height:8px;
  background:var(--lime);
  display:inline-block;
  flex:0 0 auto;
}
.brand b{font-weight:900}
.brand em{font-style:normal;font-weight:500}
.nav-links{
  display:flex;
  align-items:center;
  gap:30px;
}
.nav-links a{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:26px 0;
  font-size:14px;
  color:var(--secondary);
  transition:color .2s ease;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:18px;
  width:0;
  height:2px;
  background:var(--lime);
  transition:width .22s cubic-bezier(.2,.7,.2,1);
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{width:100%}
.nav-links a.is-active{color:var(--ink);font-weight:700}
.nav-links a.is-active::after{width:100%;background:var(--ink)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-status{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--muted);
  border:1px solid var(--line);
  border-radius:2px;
  padding:4px 8px;
  white-space:nowrap;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:44px;
  padding:0 28px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:14px;
  font-weight:700;
  line-height:1;
  cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn .arrow{display:inline-block;transition:transform .2s ease}
.btn-primary{
  position:relative;
  z-index:0;
  overflow:hidden;
  background:var(--ink);
  color:#fff;
}
.btn-primary::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  background:var(--lime);
  transform:translateX(-101%);
  transition:transform .28s cubic-bezier(.2,.7,.2,1);
}
.btn-primary:hover{color:var(--ink)}
.btn-primary:hover::before{transform:translateX(0)}
.btn-primary:hover .arrow{transform:translateX(3px)}
.btn-outline{
  background:transparent;
  border-color:var(--ink);
  color:var(--ink);
}
.btn-outline:hover{background:var(--sand)}
.btn-lime{
  background:var(--lime);
  color:var(--ink);
}
.btn-lime:hover{background:#d8ff63;transform:translateY(-1px)}
.text-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--ink);
  font-weight:600;
  font-size:14px;
  text-decoration:none;
  padding-bottom:3px;
}
.text-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:0;
  height:1px;
  background:var(--ink);
  transition:width .22s cubic-bezier(.2,.7,.2,1);
}
.text-link:hover::after{width:100%}
.text-link:hover{color:var(--ink)}
.mobile-toggle{
  display:none;
  width:44px;
  height:44px;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  align-items:center;
  justify-content:center;
  cursor:pointer;
  background:var(--surface);
}
.mobile-toggle span{
  position:relative;
  display:block;
  width:18px;
  height:1px;
  background:var(--ink);
  transition:background-color .2s ease;
}
.mobile-toggle span::before,
.mobile-toggle span::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:1px;
  background:var(--ink);
  transition:transform .2s ease,top .2s ease;
}
.mobile-toggle span::before{top:-6px}
.mobile-toggle span::after{top:6px}
.mobile-toggle[aria-expanded="true"] span{background:transparent}
.mobile-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.mobile-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}
.mobile-panel{
  display:none;
  position:fixed;
  top:72px;
  right:0;
  bottom:0;
  left:0;
  z-index:90;
  background:var(--surface);
  padding:20px 24px 24px;
  border-top:1px solid var(--line);
  overflow-y:auto;
}
.mobile-panel.is-open{display:flex;flex-direction:column}
.mobile-panel nav{display:flex;flex-direction:column}
.mobile-panel nav a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:56px;
  border-bottom:1px solid var(--line);
  font-size:16px;
  color:var(--ink);
}
.mobile-panel nav a::after{content:"›";font-size:22px;color:var(--muted);line-height:1}
.mobile-panel .btn{margin-top:auto;width:100%}
body.menu-open{overflow:hidden}

.page-main{padding:32px 0 0}
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--muted);
  margin-bottom:36px;
}
.breadcrumb a{
  color:var(--secondary);
  transition:color .2s ease;
}
.breadcrumb a:hover{color:var(--ink)}
.breadcrumb .sep{color:var(--muted)}
.breadcrumb .current{
  color:var(--muted);
  max-width:100%;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.article-hero{
  max-width:900px;
  margin:0 auto 44px;
}
.article-meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:18px;
}
.badge{
  display:inline-flex;
  align-items:center;
  min-height:26px;
  padding:0 10px;
  border-radius:2px;
  background:var(--sand);
  color:var(--ink);
  font-size:12px;
  line-height:1;
  font-weight:600;
  letter-spacing:.06em;
}
.badge-lime{background:var(--lime)}
.meta-date{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--muted);
  letter-spacing:.04em;
}
.article-hero h1{
  font-size:clamp(34px,4.6vw,48px);
  line-height:1.25;
  letter-spacing:-.02em;
  font-weight:900;
  margin:0 0 18px;
  max-width:840px;
}
.article-lead{
  max-width:760px;
  font-size:17px;
  line-height:1.85;
  color:var(--secondary);
}
.article-cover{
  max-width:900px;
  margin:0 auto 40px;
}
.article-cover img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  border-radius:var(--radius-card);
  background:var(--sand);
}
.article-cover figcaption{
  margin-top:10px;
  font-size:12px;
  line-height:1.6;
  color:var(--muted);
}
.article-body-card{
  max-width:860px;
  margin:0 auto;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:56px 48px;
  box-shadow:var(--shadow-static);
}
.article-prose{
  max-width:760px;
  margin:0 auto;
  font-size:17px;
  line-height:1.9;
  color:var(--ink);
  word-break:break-word;
}
.article-prose p{margin:0 0 1em}
.article-prose > p:last-child{margin-bottom:0}
.article-prose h2{
  margin:40px 0 16px;
  padding-left:16px;
  border-left:3px solid var(--ink);
  font-size:32px;
  line-height:1.3;
  font-weight:700;
  letter-spacing:-.01em;
}
.article-prose h2:first-child{margin-top:0}
.article-prose h3{
  margin:32px 0 12px;
  font-size:24px;
  line-height:1.4;
  font-weight:600;
}
.article-prose h4{
  margin:24px 0 10px;
  font-size:19px;
  line-height:1.5;
  font-weight:700;
}
.article-prose a{
  color:var(--ink);
  text-decoration:underline;
  text-decoration-color:var(--line);
  text-underline-offset:4px;
  transition:text-decoration-color .2s ease;
}
.article-prose a:hover{text-decoration-color:var(--lime-ink)}
.article-prose ul,
.article-prose ol{
  margin:1em 0 1.4em;
  padding-left:0;
  list-style:none;
}
.article-prose li{
  position:relative;
  margin-bottom:.6em;
  padding-left:24px;
}
.article-prose ul > li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:7px;
  height:7px;
  background:var(--ink);
}
.article-prose ol{counter-reset:item}
.article-prose ol > li{counter-increment:item}
.article-prose ol > li::before{
  content:counter(item,decimal-leading-zero);
  position:absolute;
  left:0;
  top:.48em;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1;
  color:var(--secondary);
}
.article-prose blockquote{
  margin:28px 0;
  padding:20px 24px;
  background:var(--sand);
  border-left:3px solid var(--lime);
  color:var(--secondary);
  font-size:17px;
  line-height:1.85;
}
.article-prose blockquote p:last-child{margin-bottom:0}
.article-prose img{
  max-width:100%;
  height:auto;
  margin:28px 0;
  border-radius:var(--radius-card);
}
.article-prose figure{margin:28px 0}
.article-prose figcaption{
  margin-top:10px;
  font-size:12px;
  line-height:1.6;
  color:var(--muted);
}
.article-prose hr{
  border:0;
  border-top:1px solid var(--line);
  margin:40px 0;
}
.table-scroll{
  margin:28px 0;
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  -webkit-overflow-scrolling:touch;
}
.article-prose table{
  width:100%;
  min-width:600px;
  border-collapse:collapse;
  font-size:15px;
  line-height:1.7;
}
.article-prose th{
  padding:12px 14px;
  background:var(--sand);
  text-align:left;
  font-weight:700;
  white-space:nowrap;
}
.article-prose td{
  padding:12px 14px;
  border-top:1px solid var(--line);
  vertical-align:top;
}
.article-prose code{
  font-family:var(--font-mono);
  font-size:.88em;
  background:var(--sand);
  padding:2px 5px;
  border-radius:2px;
}
.article-prose pre{
  overflow-x:auto;
  padding:18px 20px;
  background:var(--ink);
  color:var(--footer-text);
  border-radius:var(--radius-card);
  font-family:var(--font-mono);
  font-size:14px;
  line-height:1.7;
}
.article-prose pre code{background:transparent;padding:0;color:inherit}
.empty-state{
  text-align:center;
  color:var(--muted);
  padding:48px 0;
  border-top:1px dashed var(--line);
}
.empty-state p{margin:0 0 18px}
.article-empty{max-width:760px;margin:0 auto}
.article-footer{
  max-width:860px;
  margin:40px auto 0;
}
.tag-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-bottom:28px;
}
.tag{
  display:inline-flex;
  align-items:center;
  min-height:30px;
  padding:0 10px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:2px;
  font-size:12px;
  line-height:1;
  color:var(--secondary);
}
.article-actions{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:48px;
}
.related-block{
  border-top:1px solid var(--line);
  padding-top:28px;
}
.related-head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:20px;
  margin-bottom:8px;
}
.related-head h2{
  font-size:22px;
  line-height:1.4;
  font-weight:700;
  letter-spacing:-.01em;
}
.related-head span{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--muted);
  letter-spacing:.08em;
}
.related-list{list-style:none;margin:0;padding:0}
.related-list li{border-bottom:1px solid var(--line)}
.related-list a{
  display:flex;
  align-items:center;
  gap:16px;
  padding:18px 0;
  color:var(--ink);
  transition:padding-left .2s ease;
}
.related-list a:hover{padding-left:6px}
.related-index{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--muted);
}
.related-main{min-width:0}
.related-title{
  display:block;
  font-weight:700;
  font-size:16px;
  line-height:1.5;
}
.related-desc{
  display:block;
  margin-top:3px;
  font-size:13px;
  line-height:1.6;
  color:var(--muted);
}
.related-arrow{
  margin-left:auto;
  flex:0 0 auto;
  color:var(--muted);
  font-size:18px;
  line-height:1;
  transition:transform .2s ease,color .2s ease;
}
.related-list a:hover .related-arrow{transform:translateX(3px);color:var(--ink)}
.article-cta{
  background:var(--ink);
  color:var(--footer-text);
  margin-top:72px;
}
.article-cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:56px 0;
}
.article-cta h2{
  color:#fff;
  font-size:clamp(26px,3vw,34px);
  line-height:1.25;
  font-weight:700;
  letter-spacing:-.01em;
  margin-bottom:8px;
}
.article-cta p{
  color:rgba(245,243,238,.72);
  font-size:14px;
  line-height:1.7;
}
.article-cta .btn{flex:0 0 auto}
.back-top{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:80;
  display:flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border-radius:50%;
  background:var(--ink);
  color:#fff;
  font-family:var(--font-mono);
  font-size:16px;
  line-height:1;
  opacity:0;
  pointer-events:none;
  transform:translateY(8px);
  transition:opacity .2s ease,transform .2s ease,background-color .2s ease;
}
.back-top.is-visible{opacity:1;pointer-events:auto;transform:translateY(0)}
.back-top:hover{background:#24292e}
.site-footer{
  background:var(--ink);
  color:var(--footer-text);
  padding:72px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr .8fr .8fr 1fr;
  border-top:1px solid rgba(255,255,255,.12);
}
.footer-col{
  padding:32px 32px 32px 0;
  min-width:0;
}
.footer-col + .footer-col{
  border-left:1px solid rgba(255,255,255,.12);
  padding-left:32px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-size:20px;
  line-height:1;
  letter-spacing:-.02em;
  margin-bottom:16px;
}
.footer-brand .brand-mark{background:var(--lime)}
.footer-brand b{font-weight:900}
.footer-brand em{font-style:normal;font-weight:500}
.footer-desc{
  max-width:340px;
  color:rgba(245,243,238,.68);
  font-size:13px;
  line-height:1.8;
  margin-bottom:18px;
}
.footer-contact{
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.9;
  color:rgba(245,243,238,.56);
  letter-spacing:.02em;
}
.footer-title{
  font-size:12px;
  line-height:1.4;
  letter-spacing:.08em;
  color:rgba(245,243,238,.48);
  margin-bottom:16px;
}
.footer-links{list-style:none;margin:0;padding:0}
.footer-links li{margin-bottom:10px}
.footer-links a{
  color:rgba(245,243,238,.78);
  font-size:13px;
  line-height:1.5;
  transition:color .2s ease;
}
.footer-links a:hover{color:#fff}
.footer-note{
  color:rgba(245,243,238,.62);
  font-size:12px;
  line-height:1.8;
  max-width:300px;
}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
  margin-top:40px;
  padding:22px 0 32px;
  border-top:1px solid rgba(255,255,255,.12);
  color:rgba(245,243,238,.44);
  font-size:12px;
  line-height:1.6;
}
.footer-bottom span{overflow-wrap:anywhere}
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-status,.nav-cta{display:none}
  .mobile-toggle{display:inline-flex}
  .header-inner{gap:16px}
  .article-body-card{padding:48px 36px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-col{padding:28px 28px 28px 0}
  .footer-col + .footer-col{border-left:0;border-top:1px solid rgba(255,255,255,.12);padding-left:0}
  .footer-col:nth-child(2){padding-right:28px}
  .footer-col:nth-child(3){padding-right:28px}
  .article-cta-inner{padding:48px 0}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .page-main{padding-top:22px}
  .breadcrumb{margin-bottom:26px;font-size:12px}
  .article-hero{margin-bottom:32px}
  .article-hero h1{font-size:clamp(30px,7vw,40px);line-height:1.28}
  .article-lead{font-size:16px;line-height:1.8}
  .article-cover{margin-bottom:32px}
  .article-body-card{padding:32px 22px;border-radius:var(--radius-card)}
  .article-prose{font-size:17px;line-height:1.9}
  .article-prose h2{font-size:26px;margin-top:34px}
  .article-prose h3{font-size:21px}
  .article-prose blockquote{padding:16px 18px}
  .article-footer{margin-top:32px}
  .related-list a{gap:12px;padding:16px 0}
  .related-desc{display:none}
  .article-cta{margin-top:56px}
  .article-cta-inner{display:block;padding:42px 0}
  .article-cta p{margin-bottom:20px}
  .article-cta .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-col{padding:24px 0}
  .footer-col:nth-child(2),.footer-col:nth-child(3){padding-right:0}
  .footer-col + .footer-col{border-top:1px solid rgba(255,255,255,.12)}
  .footer-bottom{display:block;line-height:1.9}
  .footer-bottom span{display:block}
  .back-top{right:18px;bottom:18px}
}
@media (max-width:520px){
  .brand{font-size:18px}
  .brand-mark{width:7px;height:7px}
  .article-meta{gap:10px}
  .article-prose{font-size:16.5px}
  .article-prose h2{font-size:24px;padding-left:12px}
  .article-prose ul > li::before{width:6px;height:6px}
  .btn{padding:0 20px;min-height:46px}
  .article-body-card{padding:28px 18px}
  .article-cover figcaption{font-size:11px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .btn-primary:hover .arrow,
  .related-list a:hover,
  .related-list a:hover .related-arrow,
  .back-top,
  .article-cta .btn-lime:hover{
    transform:none;
  }
}

/* roulang page: category2 */
:root{
  --paper:#F7F5F1;
  --surface:#FFFFFF;
  --ink:#14171A;
  --ink-2:#5C6166;
  --ink-3:#8A8F94;
  --line:#E3DFD7;
  --lime:#C8F04B;
  --lime-ink:#6E8B12;
  --sand:#EDE8DE;
  --r-card:6px;
  --r-btn:4px;
  --r-badge:2px;
  --shadow-1:0 1px 2px rgba(20,23,26,.06);
  --shadow-2:0 12px 30px -14px rgba(20,23,26,.18);
  --container:1240px;
  --mono:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.9;
  font-weight:400;
  overflow-x:hidden;
}
body.no-scroll{overflow:hidden;}
h1,h2,h3,h4,h5{
  margin:0;
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC",sans-serif;
  color:var(--ink);
  letter-spacing:-0.01em;
}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
a{color:inherit;text-decoration:none;}
a:hover{color:var(--ink);}
img{max-width:100%;display:block;border-radius:var(--r-card);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 18px -14px rgba(20,23,26,.4);}
.header-inner{
  display:flex;
  align-items:center;
  gap:28px;
  height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:19px;
  line-height:1;
  white-space:nowrap;
}
.brand-mark{
  width:8px;height:8px;
  background:var(--lime);
  border-radius:1px;
  display:inline-block;
  flex:0 0 auto;
}
.brand b{font-weight:900;letter-spacing:-0.02em;}
.brand em{font-style:normal;font-weight:400;color:var(--ink);}
.nav-links{
  display:flex;
  align-items:center;
  gap:30px;
  margin-left:8px;
}
.nav-links a{
  position:relative;
  font-size:15px;
  color:var(--ink-2);
  padding:6px 0;
  transition:color .18s ease;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s cubic-bezier(.2,.7,.2,1);
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--ink);font-weight:500;}
.nav-links a.is-active::after{background:var(--ink);transform:scaleX(1);}
.header-actions{
  display:flex;
  align-items:center;
  gap:14px;
  margin-left:auto;
}
.status-badge{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--ink-2);
  background:var(--sand);
  border-radius:var(--r-badge);
  padding:4px 8px;
  white-space:nowrap;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  position:relative;
  overflow:hidden;
  border:1px solid transparent;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:500;
  line-height:1;
  padding:0 28px;
  height:46px;
  cursor:pointer;
  transition:color .2s ease,border-color .2s ease,background-color .2s ease,transform .2s ease;
  isolation:isolate;
}
.btn::before{
  content:"";
  position:absolute;
  inset:0;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .28s cubic-bezier(.2,.7,.2,1);
  z-index:-1;
}
.btn:hover::before{transform:scaleX(1);}
.btn .arrow{transition:transform .2s ease;}
.btn:hover .arrow{transform:translateX(3px);}
.btn-primary{background:var(--ink);color:#fff;}
.btn-primary:hover{color:var(--ink);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--sand);color:var(--ink);border-color:var(--ink);}
.btn-ghost::before{display:none;}
.btn-outline{background:transparent;color:var(--ink);border-color:var(--line);}
.btn-outline::before{display:none;}
.btn-outline:hover{border-color:var(--ink);background:var(--sand);}
.btn-sm{height:40px;padding:0 20px;font-size:14px;}
.btn-lime{background:var(--lime);color:var(--ink);border-color:var(--lime);}
.btn-lime::before{background:var(--surface);}
.btn-lime:hover{color:var(--ink);}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;
  justify-content:center;
  background:transparent;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  cursor:pointer;
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  background:var(--ink);
  position:relative;
  transition:background .2s ease;
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;height:2px;
  background:var(--ink);
  transition:transform .22s ease;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg);}

.mobile-panel{
  display:none;
  position:fixed;
  top:72px;left:0;right:0;bottom:0;
  background:var(--surface);
  border-top:1px solid var(--line);
  z-index:79;
  overflow-y:auto;
  padding:8px 24px 32px;
}
.mobile-panel.is-open{display:block;}
.mobile-panel a.m-link{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:56px;
  font-size:16px;
  color:var(--ink);
  border-bottom:1px solid var(--line);
}
.mobile-panel a.m-link::after{
  content:"→";
  font-family:var(--mono);
  font-size:14px;
  color:var(--ink-3);
}
.mobile-panel a.m-link.is-active{font-weight:700;}
.mobile-panel .m-cta{margin-top:24px;width:100%;}

/* ---------- page hero ---------- */
.page-hero{
  padding:56px 0 64px;
  background:var(--paper);
  border-bottom:1px solid var(--line);
  position:relative;
  overflow:hidden;
}
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-3);
  margin-bottom:26px;
  flex-wrap:wrap;
}
.crumb a{color:var(--ink-3);}
.crumb a:hover{color:var(--ink);}
.crumb .sep{color:var(--line);}
.crumb .now{color:var(--ink-2);}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:48px;
  align-items:start;
}
.hero-copy{max-width:620px;}
.hero-kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--ink-2);
  background:var(--sand);
  border-radius:var(--r-badge);
  padding:6px 10px;
  margin-bottom:22px;
}
.hero-kicker i{width:6px;height:6px;background:var(--lime);border-radius:1px;display:inline-block;}
h1.hero-title{
  font-size:clamp(34px,5.2vw,60px);
  line-height:1.06;
  font-weight:900;
  letter-spacing:-0.02em;
  margin-bottom:22px;
}
h1.hero-title .hl{
  background:linear-gradient(transparent 72%, var(--lime) 72%, var(--lime) 94%, transparent 94%);
  padding:0 2px;
}
.hero-sub{
  font-size:17px;
  line-height:1.9;
  color:var(--ink-2);
  max-width:560px;
  margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-facts{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
  margin-top:40px;
  padding-top:26px;
  border-top:1px solid var(--line);
}
.hero-fact .num{
  font-family:var(--mono);
  font-size:26px;
  font-weight:700;
  color:var(--ink);
  display:block;
  line-height:1.2;
}
.hero-fact .txt{font-size:13px;color:var(--ink-2);line-height:1.7;}
.hero-media{
  position:relative;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--sand);
  aspect-ratio:4/5;
}
.hero-media img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.hero-media .tag{
  position:absolute;
  left:16px;bottom:16px;
  background:rgba(20,23,26,.86);
  color:#F5F3EE;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.08em;
  padding:6px 10px;
  border-radius:var(--r-badge);
}

/* ---------- sections ---------- */
.section{padding:96px 0;}
.section.tight{padding:72px 0;}
.section.sand{background:var(--sand);}
.section-head{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,8fr);
  gap:48px;
  align-items:end;
  margin-bottom:56px;
}
.section-head .lead h2{
  font-size:clamp(28px,3.4vw,40px);
  line-height:1.2;
  font-weight:700;
}
.section-head .lead .no{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--ink-3);
  display:block;
  margin-bottom:14px;
}
.section-head .aside{
  font-size:16px;
  color:var(--ink-2);
  line-height:1.9;
  max-width:640px;
}

/* zigzag */
.zig{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:56px;
  align-items:center;
  padding:56px 0;
  border-top:1px solid var(--line);
}
.zig:first-of-type{border-top:1px solid var(--line);}
.zig-media{
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--sand);
  aspect-ratio:16/11;
}
.zig-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .5s cubic-bezier(.2,.7,.2,1);}
.zig:hover .zig-media img{transform:scale(1.02);}
.zig.rev .zig-media{order:2;}
.zig.rev .zig-body{order:1;}
.zig-no{
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.14em;
  color:var(--lime-ink);
  display:inline-block;
  margin-bottom:14px;
}
.zig-body h3{
  font-size:clamp(22px,2.6vw,28px);
  font-weight:700;
  line-height:1.3;
  margin-bottom:16px;
}
.zig-body p{font-size:16px;line-height:1.9;color:var(--ink-2);}
.zig-list{margin-top:22px;display:flex;flex-direction:column;gap:12px;}
.zig-list li{
  position:relative;
  padding-left:20px;
  font-size:15px;
  color:var(--ink-2);
  line-height:1.8;
}
.zig-list li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:6px;height:6px;
  background:var(--ink);
  border-radius:1px;
}

/* feature matrix */
.matrix{border-top:1px solid var(--line);}
.matrix-row{
  display:grid;
  grid-template-columns:120px minmax(0,3fr) minmax(0,7fr);
  gap:32px;
  align-items:start;
  padding:34px 0;
  border-bottom:1px solid var(--line);
  transition:background-color .2s ease;
}
.matrix-row:hover{background:rgba(200,240,75,.10);}
.matrix-row .m-no{
  font-family:var(--mono);
  font-size:44px;
  font-weight:700;
  line-height:1;
  color:var(--line);
  transition:color .22s ease;
}
.matrix-row:hover .m-no{color:var(--lime-ink);}
.matrix-row h3{
  font-size:22px;
  font-weight:600;
  line-height:1.4;
}
.matrix-row p{
  font-size:15.5px;
  color:var(--ink-2);
  line-height:1.9;
  margin:0;
}

/* roles */
.roles{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.role-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px 26px;
  box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.role-card:hover{
  transform:translateY(-2px);
  border-color:var(--ink);
  box-shadow:var(--shadow-2);
}
.role-card .r-tag{
  display:inline-block;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.08em;
  background:var(--sand);
  border-radius:var(--r-badge);
  padding:4px 8px;
  color:var(--ink-2);
  margin-bottom:16px;
}
.role-card h3{font-size:20px;font-weight:600;margin-bottom:10px;}
.role-card p{font-size:15px;color:var(--ink-2);line-height:1.85;margin:0;}

/* spec table */
.table-wrap{
  width:100%;
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--surface);
  box-shadow:var(--shadow-1);
  -webkit-overflow-scrolling:touch;
}
table.spec{
  width:100%;
  min-width:640px;
  border-collapse:collapse;
  font-size:15px;
}
table.spec thead th{
  background:var(--sand);
  color:var(--ink);
  font-weight:600;
  font-size:14px;
  letter-spacing:.04em;
  text-align:left;
  padding:16px 22px;
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
table.spec tbody td{
  padding:16px 22px;
  border-bottom:1px solid var(--line);
  color:var(--ink-2);
  line-height:1.75;
  vertical-align:top;
}
table.spec tbody tr:last-child td{border-bottom:none;}
table.spec tbody td:first-child{
  color:var(--ink);
  font-weight:500;
  white-space:nowrap;
}
table.spec tbody tr:hover td{background:rgba(237,232,222,.4);}
.table-note{
  font-family:var(--mono);
  font-size:12px;
  color:var(--ink-3);
  letter-spacing:.04em;
  margin-top:14px;
}

/* cta band */
.cta-band{
  background:var(--ink);
  color:#F5F3EE;
  padding:72px 0;
}
.cta-band .inner{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:40px;
  align-items:center;
}
.cta-band h2{
  color:#F5F3EE;
  font-size:clamp(26px,3.2vw,38px);
  line-height:1.25;
  font-weight:700;
  margin-bottom:14px;
}
.cta-band p{color:rgba(245,243,238,.72);font-size:15.5px;line-height:1.85;margin:0;}
.cta-band .cta-right{display:flex;justify-content:flex-end;}
.cta-foot{
  margin-top:36px;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.12);
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(245,243,238,.55);
}

/* tail link */
.tail-link{
  padding:56px 0 72px;
}
.tail-link .box{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--surface);
  padding:26px 30px;
}
.tail-link .box p{margin:0;color:var(--ink-2);font-size:15.5px;}
.tail-link .tlink{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:500;
  color:var(--ink);
  position:relative;
  padding-bottom:3px;
}
.tail-link .tlink::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:100%;height:1px;
  background:var(--ink);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .24s cubic-bezier(.2,.7,.2,1);
}
.tail-link .tlink:hover::after{transform:scaleX(1);}
.tail-link .tlink .arrow{transition:transform .2s ease;}
.tail-link .tlink:hover .arrow{transform:translateX(3px);}

/* footer */
.site-footer{
  background:var(--ink);
  color:#F5F3EE;
  padding:72px 0 32px;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,2.6fr) minmax(0,2.6fr) minmax(0,2.8fr);
  gap:0;
}
.footer-col{
  padding:0 28px;
  border-left:1px solid rgba(255,255,255,.12);
}
.footer-col:first-child{padding-left:0;border-left:none;}
.footer-col:last-child{padding-right:0;}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:19px;
  margin-bottom:18px;
}
.footer-brand b{font-weight:900;color:#F5F3EE;}
.footer-brand em{font-style:normal;color:rgba(245,243,238,.86);}
.footer-brand .brand-mark{background:var(--lime);}
.footer-desc{
  font-size:14.5px;
  line-height:1.9;
  color:rgba(245,243,238,.66);
  margin-bottom:20px;
  max-width:340px;
}
.footer-contact{
  font-family:var(--mono);
  font-size:12.5px;
  line-height:2;
  color:rgba(245,243,238,.5);
  letter-spacing:.02em;
}
.footer-title{
  font-size:13px;
  letter-spacing:.1em;
  color:rgba(245,243,238,.5);
  margin-bottom:18px;
  font-family:var(--mono);
}
.footer-links li{margin-bottom:12px;}
.footer-links a{
  font-size:14.5px;
  color:rgba(245,243,238,.84);
  position:relative;
  padding-bottom:2px;
}
.footer-links a::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:100%;height:1px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s cubic-bezier(.2,.7,.2,1);
}
.footer-links a:hover{color:#fff;}
.footer-links a:hover::after{transform:scaleX(1);}
.footer-note{
  font-size:14px;
  line-height:1.9;
  color:rgba(245,243,238,.6);
  margin:0;
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:20px;
  margin-top:56px;
  padding-top:24px;
  border-top:1px solid rgba(255,255,255,.12);
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.04em;
  color:rgba(245,243,238,.5);
}
.footer-bottom span:last-child{margin-left:auto;}

/* reveal animation */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .48s cubic-bezier(.2,.7,.2,1),transform .48s cubic-bezier(.2,.7,.2,1);
}
.reveal.is-in{opacity:1;transform:none;}

/* responsive */
@media (max-width:1279px){
  .container{padding:0 22px;}
  .hero-grid{gap:36px;}
}
@media (max-width:1023px){
  .nav-links,.status-badge,.header-actions .btn{display:none;}
  .nav-toggle{display:inline-flex;}
  .section{padding:72px 0;}
  .section.tight{padding:56px 0;}
  .section-head{grid-template-columns:1fr;gap:20px;margin-bottom:40px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-media{aspect-ratio:16/10;max-width:560px;}
  .zig{grid-template-columns:1fr;gap:28px;padding:44px 0;}
  .zig.rev .zig-media{order:0;}
  .zig.rev .zig-body{order:0;}
  .matrix-row{grid-template-columns:72px minmax(0,1fr);gap:20px;padding:28px 0;}
  .matrix-row p{grid-column:2;}
  .roles{grid-template-columns:1fr;gap:16px;}
  .cta-band .inner{grid-template-columns:1fr;gap:26px;}
  .cta-band .cta-right{justify-content:flex-start;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px 0;}
  .footer-col{padding:0 24px;}
  .footer-col:nth-child(odd){padding-left:0;border-left:none;}
  .footer-col:nth-child(even){padding-right:0;}
  .footer-col:nth-child(3),.footer-col:nth-child(4){border-top:1px solid rgba(255,255,255,.12);padding-top:28px;}
  .footer-col:nth-child(3){padding-left:0;border-left:none;}
  .footer-bottom span:last-child{margin-left:0;}
}
@media (max-width:639px){
  .container{padding:0 18px;}
  body{font-size:16px;}
  .header-inner{height:64px;gap:12px;}
  .brand{font-size:17px;}
  .mobile-panel{top:64px;}
  .page-hero{padding:36px 0 44px;}
  .section{padding:56px 0;}
  .section.tight{padding:44px 0;}
  .hero-actions{gap:10px;}
  .hero-actions .btn{flex:1 1 100%;height:48px;}
  .hero-facts{grid-template-columns:1fr;gap:14px;margin-top:32px;}
  .hero-fact{display:flex;align-items:baseline;gap:14px;}
  .hero-fact .num{font-size:22px;}
  .zig-media{aspect-ratio:16/12;}
  .matrix-row{grid-template-columns:1fr;gap:10px;}
  .matrix-row .m-no{font-size:32px;}
  .matrix-row p{grid-column:1;}
  .footer-grid{grid-template-columns:1fr;gap:0;}
  .footer-col{padding:24px 0;border-left:none;border-top:1px solid rgba(255,255,255,.12);}
  .footer-col:first-child{padding-top:0;border-top:none;}
  .footer-col:nth-child(3),.footer-col:nth-child(4){padding-top:24px;}
  .cta-band{padding:52px 0;}
  .cta-band .btn-lime{width:100%;}
  .tail-link .box{padding:22px;gap:16px;}
  .tail-link .tlink{min-height:44px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category3 */
:root {
      --paper: #F7F5F1;
      --surface: #FFFFFF;
      --ink: #14171A;
      --sub: #5C6166;
      --muted: #8A8F94;
      --line: #E3DFD7;
      --lime: #C8F04B;
      --lime-ink: #6E8B12;
      --sand: #EDE8DE;
      --radius-card: 6px;
      --radius-btn: 4px;
      --shadow-soft: 0 1px 2px rgba(20, 23, 26, .06);
      --shadow-hover: 0 12px 30px -14px rgba(20, 23, 26, .18);
      --ease: cubic-bezier(.2, .7, .2, 1);
      --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
      --container: 1240px;
      --section-y: 104px;
    }

    *,
    *::before,
    *::after {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: var(--font-sans);
      font-size: 16px;
      line-height: 1.9;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    body.is-locked {
      overflow: hidden;
    }

    img {
      display: block;
      max-width: 100%;
      height: auto;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    a:hover,
    a:focus {
      color: inherit;
    }

    button,
    input,
    textarea,
    select {
      font: inherit;
    }

    button {
      cursor: pointer;
    }

    ul,
    ol {
      margin-top: 0;
    }

    :focus-visible {
      outline: 2px solid var(--lime-ink);
      outline-offset: 3px;
    }

    ::selection {
      background: var(--lime);
      color: var(--ink);
    }

    .container {
      width: min(calc(100% - 48px), var(--container));
      margin-right: auto;
      margin-left: auto;
    }

    .mono {
      font-family: var(--font-mono);
      letter-spacing: .02em;
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 32px;
      margin-bottom: 44px;
    }

    .section-head h2 {
      margin: 0;
      max-width: 760px;
      font-size: clamp(2rem, 3.4vw, 2.75rem);
      line-height: 1.2;
      font-weight: 700;
      letter-spacing: -.02em;
    }

    .section-head p {
      max-width: 460px;
      margin: 0;
      color: var(--sub);
      font-size: 15px;
      line-height: 1.85;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      min-height: 24px;
      padding: 2px 9px;
      border-radius: 2px;
      background: var(--sand);
      color: var(--ink);
      font-size: 12px;
      line-height: 1.5;
      letter-spacing: .06em;
      font-weight: 500;
      white-space: nowrap;
    }

    .badge--lime {
      background: var(--lime);
      color: var(--ink);
    }

    .badge--outline {
      background: transparent;
      border: 1px solid var(--line);
      color: var(--sub);
    }

    .btn {
      position: relative;
      isolation: isolate;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      min-height: 44px;
      padding: 0 26px;
      border: 1px solid transparent;
      border-radius: var(--radius-btn);
      font-size: 15px;
      line-height: 1;
      font-weight: 600;
      text-align: center;
      white-space: nowrap;
      overflow: hidden;
      transition: color .2s ease, background-color .2s ease, border-color .2s ease;
    }

    .btn::before {
      content: "";
      position: absolute;
      inset: 0;
      z-index: -1;
      background: var(--lime);
      transform: translateX(-101%);
      transition: transform .25s var(--ease);
    }

    .btn:hover::before,
    .btn:focus-visible::before {
      transform: translateX(0);
    }

    .btn-primary {
      background: var(--ink);
      color: #FFFFFF;
    }

    .btn-primary:hover,
    .btn-primary:focus-visible {
      color: var(--ink);
    }

    .btn-lime {
      background: var(--lime);
      color: var(--ink);
    }

    .btn-lime::before {
      background: #FFFFFF;
    }

    .btn .arrow {
      display: inline-block;
      transition: transform .2s ease;
    }

    .btn:hover .arrow,
    .btn:focus-visible .arrow {
      transform: translateX(3px);
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: var(--surface);
      border-bottom: 1px solid var(--line);
      transition: box-shadow .22s ease;
    }

    .site-header.is-scrolled {
      box-shadow: var(--shadow-soft);
    }

    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      min-height: 72px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      flex: none;
      color: var(--ink);
      font-size: 21px;
      line-height: 1;
      white-space: nowrap;
    }

    .brand-mark {
      display: inline-block;
      width: 8px;
      height: 8px;
      flex: none;
      background: var(--lime);
    }

    .brand b {
      font-weight: 900;
      letter-spacing: -.045em;
    }

    .brand em {
      font-style: normal;
      font-weight: 500;
      letter-spacing: -.02em;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      margin: 0;
      padding: 0;
    }

    .nav-links a {
      position: relative;
      display: inline-flex;
      align-items: center;
      min-height: 44px;
      color: var(--sub);
      font-size: 15px;
      font-weight: 500;
      transition: color .18s ease;
    }

    .nav-links a::after {
      content: "";
      position: absolute;
      right: 0;
      bottom: 10px;
      left: 0;
      height: 2px;
      background: var(--lime);
      transform: scaleX(.35);
      transform-origin: left center;
      opacity: 0;
      transition: transform .2s var(--ease), opacity .2s ease, background-color .2s ease;
    }

    .nav-links a:hover,
    .nav-links a:focus-visible,
    .nav-links a.is-active {
      color: var(--ink);
    }

    .nav-links a:hover::after,
    .nav-links a:focus-visible::after {
      transform: scaleX(1);
      opacity: 1;
    }

    .nav-links a.is-active::after {
      background: var(--ink);
      transform: scaleX(1);
      opacity: 1;
    }

    .nav-right {
      display: flex;
      align-items: center;
      gap: 12px;
      flex: none;
    }

    .status-badge {
      display: inline-flex;
      align-items: center;
      height: 26px;
      padding: 0 8px;
      border: 1px solid var(--line);
      border-radius: 2px;
      background: var(--paper);
      color: var(--sub);
      font-family: var(--font-mono);
      font-size: 11px;
      line-height: 1;
      letter-spacing: .06em;
      white-space: nowrap;
    }

    .nav-cta {
      min-height: 44px;
      padding-right: 20px;
      padding-left: 20px;
    }

    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 5px;
      padding: 0;
      border: 1px solid var(--line);
      border-radius: var(--radius-btn);
      background: var(--surface);
      color: var(--ink);
    }

    .menu-toggle span {
      display: block;
      width: 18px;
      height: 2px;
      background: var(--ink);
      transition: transform .2s ease, opacity .2s ease;
    }

    .mobile-panel {
      position: fixed;
      inset: 0;
      z-index: 200;
      display: flex;
      flex-direction: column;
      padding: 24px;
      background: var(--surface);
      opacity: 0;
      visibility: hidden;
      transform: translateY(-100%);
      transition: transform .35s var(--ease), opacity .25s ease, visibility .35s;
    }

    .mobile-panel.is-open {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }

    .mobile-panel-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding-bottom: 18px;
      border-bottom: 1px solid var(--line);
    }

    .mobile-close {
      width: 44px;
      height: 44px;
      padding: 0;
      border: 1px solid var(--line);
      border-radius: var(--radius-btn);
      background: var(--surface);
      color: var(--ink);
      font-size: 24px;
      line-height: 1;
    }

    .mobile-nav {
      display: flex;
      flex-direction: column;
      margin-top: 8px;
    }

    .mobile-nav a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 56px;
      border-bottom: 1px solid var(--line);
      color: var(--ink);
      font-size: 16px;
      font-weight: 500;
    }

    .mobile-nav a::after {
      content: "→";
      color: var(--muted);
      font-family: var(--font-mono);
      font-size: 14px;
    }

    .mobile-nav a.is-active {
      color: var(--lime-ink);
    }

    .mobile-panel > .btn {
      width: 100%;
      margin-top: auto;
    }

    .page-intro {
      padding: 32px 0 64px;
    }

    .breadcrumbs {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      padding-top: 28px;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.7;
    }

    .breadcrumbs a {
      position: relative;
      color: var(--muted);
      transition: color .18s ease;
    }

    .breadcrumbs a::after {
      content: "";
      position: absolute;
      right: 0;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 1px;
      background: var(--ink);
      transition: width .2s var(--ease);
    }

    .breadcrumbs a:hover {
      color: var(--ink);
    }

    .breadcrumbs a:hover::after {
      width: 100%;
    }

    .breadcrumbs .sep {
      color: var(--line);
      opacity: .9;
    }

    .breadcrumbs .current {
      color: var(--sub);
    }

    .page-kicker {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 18px;
      color: var(--lime-ink);
      font-family: var(--font-mono);
      font-size: 12px;
      line-height: 1.6;
      letter-spacing: .08em;
      text-transform: uppercase;
      animation: riseIn .48s var(--ease) both;
    }

    .page-kicker::before {
      content: "";
      display: inline-block;
      width: 24px;
      height: 1px;
      background: var(--lime-ink);
    }

    .page-title {
      max-width: 1040px;
      margin: 0;
      color: var(--ink);
      font-size: clamp(2.45rem, 5.8vw, 4.9rem);
      line-height: 1.06;
      font-weight: 900;
      letter-spacing: -.035em;
      animation: riseIn .48s .06s var(--ease) both;
    }

    .page-title .mark {
      position: relative;
      display: inline;
      white-space: nowrap;
    }

    .page-title .mark::after {
      content: "";
      position: absolute;
      right: 0;
      bottom: .06em;
      left: 0;
      height: 2px;
      background: var(--lime);
    }

    .page-lead {
      max-width: 760px;
      margin: 24px 0 0;
      color: var(--sub);
      font-size: 17px;
      line-height: 1.9;
      animation: riseIn .48s .12s var(--ease) both;
    }

    .page-meta-row {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 26px;
      animation: riseIn .48s .18s var(--ease) both;
    }

    .meta-note {
      color: var(--muted);
      font-size: 12px;
      line-height: 1.6;
    }

    @keyframes riseIn {
      from {
        opacity: 0;
        transform: translateY(12px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .metric-band {
      background: var(--sand);
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }

    .metric-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 24px;
      flex-wrap: wrap;
      padding-top: 26px;
    }

    .metric-head .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--ink);
      font-size: 14px;
      font-weight: 600;
    }

    .metric-head .eyebrow::before {
      content: "";
      display: inline-block;
      width: 8px;
      height: 8px;
      background: var(--lime);
    }

    .metric-head p {
      margin: 0;
      color: var(--sub);
      font-size: 13px;
      line-height: 1.7;
    }

    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      padding: 34px 0 44px;
    }

    .metric {
      padding: 0 28px;
      border-left: 1px solid rgba(20, 23, 26, .12);
    }

    .metric:first-child {
      padding-left: 0;
      border-left: 0;
    }

    .metric-value {
      display: flex;
      align-items: baseline;
      gap: 8px;
      color: var(--ink);
      font-family: var(--font-mono);
      font-size: clamp(2.45rem, 4vw, 4rem);
      line-height: 1;
      font-weight: 700;
      letter-spacing: -.05em;
      white-space: nowrap;
    }

    .metric-value small {
      color: var(--sub);
      font-family: var(--font-sans);
      font-size: 13px;
      line-height: 1.4;
      font-weight: 500;
      letter-spacing: 0;
    }

    .metric-label {
      display: block;
      margin-top: 14px;
      color: var(--ink);
      font-size: 14px;
      line-height: 1.5;
      font-weight: 600;
    }

    .metric-desc {
      margin: 4px 0 0;
      color: var(--sub);
      font-size: 13px;
      line-height: 1.7;
    }

    .section-cases {
      padding: var(--section-y) 0 76px;
    }

    .case-note {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin-top: 14px;
      color: var(--muted);
      font-size: 12px;
      line-height: 1.7;
    }

    .case-note::before {
      content: "";
      display: inline-block;
      width: 16px;
      height: 1px;
      background: var(--line);
    }

    .case-grid {
      display: grid;
      grid-template-columns: repeat(12, minmax(0, 1fr));
      gap: 24px;
      align-items: start;
    }

    .case-card {
      overflow: hidden;
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-soft);
      transition: transform .2s var(--ease), border-color .2s ease, box-shadow .2s ease;
    }

    .case-card:hover {
      transform: translateY(-2px);
      border-color: var(--ink);
      box-shadow: var(--shadow-hover);
    }

    .case-card--feature {
      grid-column: span 7;
    }

    .case-card--small {
      grid-column: span 5;
      padding: 32px;
      min-height: 300px;
      display: flex;
      flex-direction: column;
    }

    .case-card--feature .case-media {
      height: 312px;
      overflow: hidden;
      background: var(--sand);
    }

    .case-card--feature .case-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .5s var(--ease);
    }

    .case-card--feature:hover .case-media img {
      transform: scale(1.02);
    }

    .case-body {
      padding: 28px 32px 32px;
    }

    .case-body--plain {
      display: flex;
      flex: 1;
      flex-direction: column;
      padding: 0;
    }

    .case-topline {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      margin-bottom: 18px;
    }

    .case-index {
      color: var(--muted);
      font-size: 11px;
      line-height: 1.5;
      letter-spacing: .06em;
      white-space: nowrap;
    }

    .case-title {
      margin: 0 0 14px;
      color: var(--ink);
      font-size: clamp(1.3rem, 2vw, 1.65rem);
      line-height: 1.4;
      font-weight: 700;
      letter-spacing: -.015em;
    }

    .case-desc {
      margin: 0 0 24px;
      color: var(--sub);
      font-size: 15px;
      line-height: 1.85;
    }

    .case-metrics {
      display: flex;
      flex-wrap: wrap;
      gap: 22px 34px;
      margin-top: auto;
      padding-top: 20px;
      border-top: 1px solid var(--line);
    }

    .case-metric strong {
      display: block;
      color: var(--ink);
      font-family: var(--font-mono);
      font-size: 24px;
      line-height: 1;
      font-weight: 700;
      letter-spacing: -.035em;
      white-space: nowrap;
    }

    .case-metric span {
      display: block;
      margin-top: 6px;
      color: var(--muted);
      font-size: 12px;
      line-height: 1.5;
    }

    .case-card--b {
      margin-top: 44px;
    }

    .case-card--c {
      margin-top: 20px;
    }

    .quote-section {
      padding: 20px 0 94px;
    }

    .quote-block {
      padding: clamp(32px, 5vw, 56px);
      background: var(--sand);
      border-left: 3px solid var(--lime);
      border-radius: 0 var(--radius-card) var(--radius-card) 0;
    }

    .quote-block blockquote {
      max-width: 1020px;
      margin: 0;
      color: var(--ink);
      font-size: clamp(1.55rem, 3vw, 2rem);
      line-height: 1.55;
      font-weight: 700;
      letter-spacing: -.015em;
    }

    .quote-role {
      margin-top: 24px;
      color: var(--sub);
      font-family: var(--font-mono);
      font-size: 13px;
      line-height: 1.7;
      letter-spacing: .04em;
    }

    .section-notes {
      padding: 0 0 var(--section-y);
    }

    .notes-panel {
      display: grid;
      grid-template-columns: 4fr 8fr;
      gap: 48px;
      padding: 44px 0;
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }

    .notes-title h2 {
      margin: 0 0 12px;
      color: var(--ink);
      font-size: clamp(1.75rem, 3vw, 2.15rem);
      line-height: 1.3;
      letter-spacing: -.02em;
    }

    .notes-title p {
      max-width: 320px;
      margin: 0;
      color: var(--sub);
      font-size: 15px;
      line-height: 1.85;
    }

    .notes-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0 36px;
    }

    .note-item {
      padding: 18px 0;
      border-bottom: 1px solid var(--line);
    }

    .note-item:nth-child(3),
    .note-item:nth-child(4) {
      border-bottom: 0;
    }

    .note-item strong {
      display: block;
      margin-bottom: 4px;
      color: var(--ink);
      font-size: 15px;
      line-height: 1.6;
    }

    .note-item span {
      color: var(--sub);
      font-size: 14px;
      line-height: 1.8;
    }

    .cta-section {
      padding: 0 0 92px;
    }

    .cta-band {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
      padding: 48px;
      border-radius: var(--radius-card);
      background: var(--ink);
      color: #F5F3EE;
    }

    .cta-band h2 {
      margin: 0 0 8px;
      color: #F5F3EE;
      font-size: clamp(1.7rem, 3vw, 2.5rem);
      line-height: 1.3;
      letter-spacing: -.02em;
    }

    .cta-band p {
      margin: 0;
      color: rgba(245, 243, 238, .68);
      font-size: 15px;
      line-height: 1.8;
    }

    .cta-band .btn {
      flex: none;
    }

    .return-row {
      display: flex;
      justify-content: center;
      padding-top: 36px;
    }

    .text-link {
      position: relative;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      min-height: 44px;
      color: var(--ink);
      font-size: 15px;
      line-height: 1;
      font-weight: 600;
    }

    .text-link::after {
      content: "";
      position: absolute;
      right: 0;
      bottom: 9px;
      left: 0;
      width: 0;
      height: 1px;
      background: var(--ink);
      transition: width .22s var(--ease);
    }

    .text-link:hover::after,
    .text-link:focus-visible::after {
      width: 100%;
    }

    .text-link .arrow {
      display: inline-block;
      transition: transform .2s ease;
    }

    .text-link:hover .arrow,
    .text-link:focus-visible .arrow {
      transform: translateX(3px);
    }

    .site-footer {
      margin: 0;
      padding-top: 72px;
      background: var(--ink);
      color: #F5F3EE;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr .7fr .7fr 1fr;
    }

    .footer-col {
      padding: 0 32px;
      border-left: 1px solid rgba(255, 255, 255, .12);
    }

    .footer-col:first-child {
      padding-left: 0;
      border-left: 0;
    }

    .footer-col:last-child {
      padding-right: 0;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 18px;
      font-size: 20px;
      line-height: 1;
      white-space: nowrap;
    }

    .footer-brand b {
      font-weight: 900;
      letter-spacing: -.045em;
    }

    .footer-brand em {
      font-style: normal;
      font-weight: 500;
      letter-spacing: -.02em;
    }

    .footer-desc {
      max-width: 380px;
      margin: 0 0 20px;
      color: rgba(245, 243, 238, .66);
      font-size: 14px;
      line-height: 1.9;
    }

    .footer-contact {
      color: rgba(245, 243, 238, .5);
      font-size: 13px;
      line-height: 1.9;
    }

    .footer-title {
      margin-bottom: 18px;
      color: rgba(245, 243, 238, .48);
      font-size: 12px;
      line-height: 1.6;
      letter-spacing: .08em;
    }

    .footer-links {
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .footer-links li + li {
      margin-top: 10px;
    }

    .footer-links a {
      position: relative;
      color: rgba(245, 243, 238, .78);
      font-size: 14px;
      line-height: 1.7;
      transition: color .18s ease;
    }

    .footer-links a::after {
      content: "";
      position: absolute;
      right: 0;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 1px;
      background: var(--lime);
      transition: width .2s var(--ease);
    }

    .footer-links a:hover {
      color: #FFFFFF;
    }

    .footer-links a:hover::after {
      width: 100%;
    }

    .footer-note {
      margin: 0;
      color: rgba(245, 243, 238, .52);
      font-size: 13px;
      line-height: 1.9;
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      margin-top: 54px;
      padding: 22px 0;
      border-top: 1px solid rgba(255, 255, 255, .12);
      color: rgba(245, 243, 238, .45);
      font-family: var(--font-mono);
      font-size: 12px;
      line-height: 1.7;
    }

    @media (max-width: 1279px) {
      :root {
        --section-y: 92px;
      }

      .nav-links {
        gap: 20px;
      }

      .metric {
        padding: 0 20px;
      }

      .footer-col {
        padding: 0 24px;
      }
    }

    @media (max-width: 1023px) {
      .nav-links,
      .nav-right .status-badge,
      .nav-right .nav-cta {
        display: none;
      }

      .menu-toggle {
        display: flex;
      }

      .metric-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 32px 0;
      }

      .metric {
        padding: 0 24px;
      }

      .metric:nth-child(3) {
        padding-left: 0;
        border-left: 0;
      }

      .case-card--feature,
      .case-card--small {
        grid-column: span 12;
      }

      .case-card--small {
        min-height: 0;
      }

      .case-card--b,
      .case-card--c {
        margin-top: 0;
      }

      .notes-panel {
        grid-template-columns: 1fr;
        gap: 24px;
      }

      .notes-title p {
        max-width: 560px;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px 0;
      }

      .footer-col {
        padding: 0 24px;
      }

      .footer-col:nth-child(odd) {
        padding-left: 0;
        border-left: 0;
      }

      .footer-col:nth-child(even) {
        padding-right: 0;
      }
    }

    @media (max-width: 767px) {
      :root {
        --section-y: 76px;
      }

      .container {
        width: min(calc(100% - 40px), var(--container));
      }

      .section-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 14px;
        margin-bottom: 32px;
      }

      .page-intro {
        padding: 24px 0 52px;
      }

      .page-lead {
        font-size: 16px;
      }

      .case-card--feature .case-media {
        height: 260px;
      }

      .case-body {
        padding: 24px;
      }

      .case-card--small {
        padding: 24px;
      }

      .case-metrics {
        gap: 18px 28px;
      }

      .quote-section {
        padding-bottom: 72px;
      }

      .quote-block {
        padding: 30px 24px;
      }

      .note-item:nth-child(3) {
        border-bottom: 1px solid var(--line);
      }

      .note-item:nth-child(4) {
        border-bottom: 0;
      }

      .cta-band {
        flex-direction: column;
        align-items: flex-start;
        padding: 34px 28px;
      }

      .cta-band .btn {
        width: 100%;
      }

      .site-footer {
        padding-top: 54px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 0;
      }

      .footer-col {
        padding: 26px 0;
        border-top: 1px solid rgba(255, 255, 255, .12);
        border-left: 0;
      }

      .footer-col:first-child {
        padding-top: 0;
        border-top: 0;
      }

      .footer-bottom {
        margin-top: 8px;
      }
    }

    @media (max-width: 639px) {
      .container {
        width: calc(100% - 32px);
      }

      .brand {
        font-size: 19px;
      }

      .metric-head {
        padding-top: 22px;
      }

      .metric-grid {
        grid-template-columns: 1fr;
        gap: 0;
        padding: 24px 0 30px;
      }

      .metric {
        padding: 18px 0;
        border-top: 1px solid rgba(20, 23, 26, .12);
        border-left: 0;
      }

      .metric:first-child {
        padding-top: 0;
        border-top: 0;
      }

      .metric-value {
        font-size: 2.5rem;
      }

      .case-card--feature .case-media {
        height: 220px;
      }

      .case-title {
        font-size: 21px;
      }

      .notes-list {
        grid-template-columns: 1fr;
      }

      .note-item:nth-child(3) {
        border-bottom: 1px solid var(--line);
      }

      .note-item:nth-child(4) {
        border-bottom: 0;
      }

      .quote-block blockquote {
        font-size: 24px;
      }

      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      html {
        scroll-behavior: auto;
      }

      .page-kicker,
      .page-title,
      .page-lead,
      .page-meta-row {
        animation: none;
      }

      .case-card,
      .case-card:hover,
      .case-card--feature:hover .case-media img,
      .btn .arrow,
      .text-link .arrow {
        transform: none;
      }

      .case-card--feature .case-media img {
        transition: none;
      }
    }

/* roulang page: category4 */
:root{
  --paper:#F7F5F1;
  --surface:#FFFFFF;
  --ink:#14171A;
  --sub:#5C6166;
  --muted:#8A8F94;
  --line:#E3DFD7;
  --lime:#C8F04B;
  --olive:#6E8B12;
  --sand:#EDE8DE;
  --danger:#B3261E;
  --radius-card:6px;
  --radius-btn:4px;
  --shadow-1:0 1px 2px rgba(20,23,26,.06);
  --shadow-2:0 12px 30px -14px rgba(20,23,26,.18);
  --container:1240px;
  --mono:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,figure,ul,ol{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.mono{font-family:var(--mono);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-1);}
.header-inner{
  height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:inline-flex;align-items:center;gap:9px;font-size:19px;letter-spacing:-.01em;line-height:1;white-space:nowrap;}
.brand-mark{width:8px;height:8px;background:var(--lime);display:inline-block;flex:0 0 8px;}
.brand b{font-weight:900;}
.brand em{font-style:normal;font-weight:400;}
.nav-links{display:flex;align-items:center;gap:26px;}
.nav-links a{
  position:relative;display:inline-block;padding:6px 0;font-size:15px;color:var(--sub);
  transition:color .2s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--ink);
  transform:scaleX(0);transform-origin:left center;transition:transform .22s ease,background .22s ease;
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after{transform:scaleX(1);background:var(--lime);}
.nav-links a.is-active{color:var(--ink);font-weight:700;}
.nav-links a.is-active::after{transform:scaleX(1);background:var(--ink);}
.header-actions{display:flex;align-items:center;gap:14px;}
.status-badge{
  font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--sub);
  background:var(--sand);border-radius:2px;padding:4px 8px;line-height:1.4;white-space:nowrap;
}
.btn{
  position:relative;display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:48px;padding:0 28px;border:1px solid transparent;border-radius:var(--radius-btn);
  font-size:15px;font-weight:700;line-height:1;overflow:hidden;
  transition:color .22s ease,border-color .22s ease,background-color .22s ease,transform .18s ease;
}
.btn > span{position:relative;z-index:2;}
.btn-arrow{position:relative;z-index:2;display:inline-block;transition:transform .22s ease;}
.btn-primary{background:var(--ink);color:#fff;}
.btn-primary::before{
  content:"";position:absolute;inset:0;z-index:1;background:var(--lime);
  transform:translateX(-101%);transition:transform .3s cubic-bezier(.2,.7,.2,1);
}
.btn-primary:hover{color:var(--ink);}
.btn-primary:hover::before{transform:translateX(0);}
.btn-primary:hover .btn-arrow{transform:translateX(3px);}
.btn-primary:active{transform:translateY(1px);}
.btn-sm{height:40px;padding:0 20px;font-size:14px;}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--sand);}
.btn-ghost:hover .btn-arrow{transform:translateX(3px);}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:var(--surface);position:relative;
}
.nav-toggle i{position:absolute;left:50%;width:18px;height:1.5px;background:var(--ink);transform:translateX(-50%);transition:transform .2s ease,opacity .2s ease;}
.nav-toggle i:nth-child(1){top:16px;}
.nav-toggle i:nth-child(2){top:21px;}
.nav-toggle i:nth-child(3){top:26px;}
.nav-toggle.is-open i:nth-child(1){transform:translateX(-50%) translateY(5px) rotate(45deg);}
.nav-toggle.is-open i:nth-child(2){opacity:0;}
.nav-toggle.is-open i:nth-child(3){transform:translateX(-50%) translateY(-5px) rotate(-45deg);}
.mobile-panel{
  display:flex;flex-direction:column;
  position:fixed;left:0;right:0;top:72px;bottom:0;z-index:110;
  background:var(--surface);padding:16px 24px 32px;overflow-y:auto;
}
.mobile-panel[hidden]{display:none;}
.mobile-nav{display:flex;flex-direction:column;}
.mobile-nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:56px;padding:0 4px;font-size:16px;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.mobile-nav a::after{content:"›";color:var(--muted);font-size:18px;line-height:1;}
.mobile-nav a.is-active{font-weight:700;}
.mobile-nav a.is-active::after{color:var(--olive);}
.mobile-cta{margin-top:24px;width:100%;}

/* ---------- 页面头部 ---------- */
.page-head{padding:64px 0 56px;border-bottom:1px solid var(--line);}
.page-head-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);flex-wrap:wrap;}
.crumbs a{color:var(--muted);border-bottom:1px solid transparent;transition:color .2s ease,border-color .2s ease;}
.crumbs a:hover{color:var(--ink);border-bottom-color:var(--ink);}
.crumbs span[aria-current]{color:var(--sub);}
.eyebrow{
  font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--olive);
  margin-top:22px;text-transform:uppercase;
}
.page-title{
  font-size:clamp(34px,5.2vw,68px);line-height:1.06;letter-spacing:-.02em;font-weight:900;
  margin-top:14px;
}
.page-title span{box-shadow:inset 0 -8px 0 var(--lime);}
.page-lead{margin-top:20px;font-size:17px;line-height:1.9;color:var(--sub);max-width:620px;}
.head-facts{display:flex;flex-wrap:wrap;gap:36px;margin-top:32px;padding-top:24px;border-top:1px solid var(--line);}
.fact{display:flex;flex-direction:column;gap:2px;}
.fact-num{font-family:var(--mono);font-size:26px;font-weight:700;line-height:1.2;letter-spacing:-.02em;}
.fact-label{font-size:13px;color:var(--muted);letter-spacing:.02em;}
.head-media{position:relative;}
.head-media img{
  width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:var(--radius-card);
  border:1px solid var(--line);
}
.head-media .media-tag{
  position:absolute;right:12px;bottom:12px;
  font-family:var(--mono);font-size:11px;letter-spacing:.06em;
  background:var(--surface);color:var(--ink);padding:6px 10px;border-radius:2px;
  border:1px solid var(--line);
}

/* ---------- 胶囊锚点 ---------- */
.pill-bar{
  position:sticky;top:72px;z-index:90;
  background:var(--paper);border-bottom:1px solid var(--line);
  padding:14px 0;
}
.pill-nav{display:flex;align-items:center;gap:10px;overflow-x:auto;scrollbar-width:none;}
.pill-nav::-webkit-scrollbar{display:none;}
.pill{
  flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 20px;border-radius:999px;
  border:1px solid var(--line);background:var(--surface);
  font-size:14px;color:var(--sub);white-space:nowrap;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.pill:hover{background:var(--sand);color:var(--ink);}
.pill.is-active{background:var(--ink);color:#fff;border-color:var(--ink);}

/* ---------- FAQ 分组 ---------- */
.faq-section{padding:80px 0 24px;}
.faq-group{scroll-margin-top:170px;margin-bottom:64px;}
.faq-group:last-child{margin-bottom:0;}
.group-head{
  display:flex;align-items:flex-start;gap:20px;
  padding-bottom:18px;border-bottom:1px solid var(--ink);
}
.group-num{
  font-family:var(--mono);font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--olive);padding-top:8px;flex:0 0 auto;
}
.group-head h2{font-size:26px;line-height:1.3;font-weight:700;letter-spacing:-.01em;}
.group-desc{margin-top:6px;font-size:15px;color:var(--sub);line-height:1.8;}
.faq-list{border-top:1px solid var(--line);margin-top:-1px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  min-height:64px;padding:19px 0;background:none;border:0;text-align:left;
  font-size:17px;font-weight:600;line-height:1.6;color:var(--ink);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--olive);}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 18px;}
.faq-icon i{
  position:absolute;left:50%;top:50%;width:16px;height:1.5px;background:currentColor;
  transform:translate(-50%,-50%);transition:transform .24s ease,opacity .24s ease;
}
.faq-icon i:nth-child(2){width:1.5px;height:16px;}
.faq-item.is-open .faq-icon i:nth-child(2){transform:translate(-50%,-50%) scaleY(0);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease;}
.faq-a-inner{
  padding:0 40px 24px 0;font-size:16px;line-height:1.9;color:var(--sub);max-width:860px;
}
.faq-a-inner strong{color:var(--ink);font-weight:700;}

/* ---------- 联系表单 ---------- */
.contact-section{
  padding:80px 0 96px;background:var(--sand);border-top:1px solid var(--line);
}
.contact-grid{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start;}
.contact-copy h2{font-size:34px;line-height:1.25;font-weight:700;letter-spacing:-.01em;margin-top:12px;}
.contact-copy p{margin-top:18px;font-size:16px;line-height:1.9;color:var(--sub);}
.contact-list{margin-top:28px;border-top:1px solid rgba(20,23,26,.15);}
.contact-list li{
  display:flex;align-items:flex-start;gap:14px;padding:14px 0;
  border-bottom:1px solid rgba(20,23,26,.15);font-size:15px;color:var(--sub);
}
.contact-list li span{font-family:var(--mono);font-size:12px;color:var(--olive);padding-top:4px;flex:0 0 22px;}
.form-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:32px;box-shadow:var(--shadow-1);
}
.field{margin-bottom:20px;}
.field label{
  display:block;font-size:13px;letter-spacing:.04em;color:var(--sub);margin-bottom:8px;
}
.field input,.field textarea{
  width:100%;height:48px;padding:0 14px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-btn);
  font-size:16px;line-height:48px;color:var(--ink);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{
  height:auto;min-height:132px;padding:12px 14px;line-height:1.8;resize:vertical;
}
.field input::placeholder,.field textarea::placeholder{color:var(--muted);}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--ink);box-shadow:inset 0 -2px 0 0 var(--lime);
}
.field input.is-error,.field textarea.is-error{border-color:var(--danger);}
.field-error{display:none;margin-top:6px;font-size:13px;line-height:1.6;color:var(--danger);}
.form-submit{width:100%;margin-top:4px;}
.form-note{
  margin-top:16px;font-family:var(--mono);font-size:12px;line-height:1.8;
  letter-spacing:.02em;color:var(--muted);
}
.form-success{
  margin-top:16px;padding:12px 14px;border-radius:var(--radius-btn);
  background:rgba(200,240,75,.28);border:1px solid var(--lime);
  font-size:14px;line-height:1.7;color:var(--ink);
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#F5F3EE;padding:72px 0 28px;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:0;
}
.footer-col{padding:0 32px;}
.footer-col:first-child{padding-left:0;}
.footer-col:last-child{padding-right:0;}
.footer-col + .footer-col{border-left:1px solid rgba(255,255,255,.12);}
.footer-brand{
  display:flex;align-items:center;gap:9px;font-size:19px;line-height:1;letter-spacing:-.01em;
}
.footer-brand .brand-mark{background:var(--lime);}
.footer-brand b{font-weight:900;color:#fff;}
.footer-brand em{font-style:normal;font-weight:400;color:#F5F3EE;}
.footer-desc{margin-top:18px;font-size:14px;line-height:1.9;color:rgba(245,243,238,.72);max-width:300px;}
.footer-contact{margin-top:20px;font-family:var(--mono);font-size:12px;line-height:2;color:rgba(245,243,238,.6);}
.footer-title{font-size:13px;letter-spacing:.1em;color:rgba(245,243,238,.55);font-family:var(--mono);margin-bottom:16px;}
.footer-links li{margin-bottom:10px;}
.footer-links a{
  font-size:14px;color:rgba(245,243,238,.86);border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.footer-links a:hover{color:var(--lime);border-bottom-color:var(--lime);}
.footer-note{font-size:13px;line-height:1.9;color:rgba(245,243,238,.62);}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 28px;
  margin-top:56px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  font-family:var(--mono);font-size:12px;letter-spacing:.02em;color:rgba(245,243,238,.55);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .nav-links{gap:20px;}
  .page-head-grid{gap:36px;}
}
@media (max-width:1023px){
  .nav-links,.header-actions .status-badge,.header-actions .btn{display:none;}
  .nav-toggle{display:block;}
  .page-head{padding:48px 0 44px;}
  .page-head-grid{grid-template-columns:1fr;gap:32px;}
  .head-media img{aspect-ratio:16/10;}
  .faq-section{padding:56px 0 16px;}
  .contact-section{padding:64px 0 72px;}
  .contact-grid{grid-template-columns:1fr;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-col{padding:0 0 28px;}
  .footer-col + .footer-col{border-left:0;}
  .footer-col:nth-child(even){padding-left:28px;border-left:1px solid rgba(255,255,255,.12);}
  .footer-col:nth-child(odd){padding-right:28px;}
  .footer-col:first-child{padding-left:0;}
  .footer-col:nth-child(3){padding-left:0;border-left:0;}
}
@media (max-width:639px){
  .container{padding:0 20px;}
  .header-inner{height:64px;}
  .brand{font-size:17px;}
  .mobile-panel{top:64px;}
  .pill-bar{top:64px;padding:12px 0;}
  .page-title{font-size:34px;line-height:1.12;}
  .page-lead{font-size:16px;}
  .head-facts{gap:24px;}
  .fact-num{font-size:22px;}
  .faq-section{padding:44px 0 8px;}
  .group-head h2{font-size:22px;}
  .faq-q{font-size:16px;min-height:56px;gap:16px;}
  .faq-a-inner{padding-right:8px;font-size:15px;}
  .contact-copy h2{font-size:26px;}
  .form-card{padding:20px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-col,.footer-col:nth-child(even),.footer-col:nth-child(odd){padding:0 0 28px;border-left:0;border-bottom:1px solid rgba(255,255,255,.12);}
  .footer-col:last-child{border-bottom:0;padding-bottom:0;}
  .footer-bottom{font-size:11px;gap:6px 18px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
}