/* roulang page: index */
:root{
  --paper:#F7F4EF;
  --card:#FFFFFF;
  --ink:#1B2A26;
  --copper:#B65C2E;
  --copper-soft:#E8C9A8;
  --text:#2A2E2C;
  --muted:#6E7671;
  --faint:#A8AEA9;
  --line:#E2DCD2;
  --line-dark:#DCD5C9;
  --on-dark:#F2EFE9;
  --warn:#A33B22;
  --r-btn:2px;
  --r-card:4px;
  --shadow-card:0 12px 28px -18px rgba(27,42,38,.35);
  --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;font-size:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0;}
h1,h2,h3,h4{margin:0;font-weight:700;}
:focus-visible{outline:2px solid var(--copper);outline-offset:2px;}
::selection{background:var(--copper-soft);color:var(--ink);}

.wrap{max-width:1180px;margin:0 auto;padding:0 32px;}
.mono{font-family:var(--font-mono);letter-spacing:.08em;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--copper);margin-bottom:18px;
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--copper);display:block;flex:0 0 24px;}
.h1{
  font-family:var(--font-serif);font-weight:800;
  font-size:clamp(30px,4.4vw,54px);line-height:1.22;letter-spacing:.01em;
  color:var(--ink);
}
.h2{
  font-family:var(--font-serif);font-weight:700;
  font-size:clamp(24px,2.4vw,34px);line-height:1.3;letter-spacing:.01em;
  color:var(--ink);
}
.h3{font-family:var(--font-serif);font-size:20px;line-height:1.5;color:var(--ink);font-weight:700;}
.lead{font-size:16.5px;line-height:1.9;color:var(--muted);}
.section{padding:96px 0;}
.section-sm{padding:72px 0;}
.rule{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- 顶部细条 ---------- */
.topbar{background:var(--ink);color:var(--on-dark);font-size:13px;}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:40px;}
.topbar-inner p{opacity:.82;letter-spacing:.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.topbar-link{display:inline-flex;align-items:center;gap:6px;color:var(--copper-soft);transition:color .22s;}
.topbar-link:hover{color:#fff;}
.topbar-link .arw{transition:transform .22s;}
.topbar-link:hover .arw{transform:translateX(4px);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,244,239,.92);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:background .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.site-header.is-scrolled{background:rgba(255,255,255,.96);border-bottom-color:var(--line-dark);}
.nav-grid{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  gap:24px;height:84px;transition:height .2s ease;
}
.site-header.is-scrolled .nav-grid{height:68px;}
.nav-side{display:flex;align-items:center;gap:32px;}
.nav-side.right{justify-content:flex-end;}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--text);
  padding:8px 0;transition:color .22s;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:2px;height:1px;width:0;
  background:var(--copper);transition:width .22s ease;
}
.nav-link:hover{color:var(--copper);}
.nav-link:hover::after{width:100%;}
.nav-link.active{color:var(--copper);}
.nav-link.active::after{width:16px;height:2px;}
.brand{display:block;text-align:center;line-height:1.15;padding:0 8px;}
.brand-main{
  display:block;font-family:var(--font-serif);font-weight:800;
  font-size:19px;letter-spacing:.01em;color:var(--ink);white-space:nowrap;
}
.brand-sub{
  display:block;margin-top:4px;font-family:var(--font-mono);
  font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--faint);
}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;background:none;border:0;cursor:pointer;padding:0;
}
.nav-toggle span{
  display:block;width:22px;height:1.5px;background:var(--ink);position:relative;
  transition:transform .25s ease,opacity .25s ease;
}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:22px;height:1.5px;background:var(--ink);
  transition:transform .25s ease;
}
.nav-toggle span::before{top:-7px;}
.nav-toggle span::after{top:7px;}
.nav-toggle.is-open span{background:transparent;}
.nav-toggle.is-open span::before{transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span::after{transform:translateY(-7px) rotate(-45deg);}

/* 移动端面板 */
.mobile-panel{
  position:fixed;inset:0;z-index:80;background:#fff;
  display:flex;flex-direction:column;
  padding:0 20px 28px;
  transform:translateY(-100%);visibility:hidden;
  transition:transform .3s cubic-bezier(.2,.7,.3,1),visibility .3s;
  overflow-y:auto;
}
.mobile-panel.open{transform:translateY(0);visibility:visible;}
.mobile-panel-top{
  display:flex;align-items:center;justify-content:space-between;
  height:64px;border-bottom:1px solid var(--line);flex:0 0 auto;
}
.mobile-panel-top .brand{text-align:left;padding:0;}
.mobile-panel-top .brand-main{font-size:16px;}
.mobile-close{
  width:44px;height:44px;background:none;border:0;cursor:pointer;
  font-size:22px;line-height:1;color:var(--ink);display:flex;align-items:center;justify-content:center;
}
.mobile-nav{flex:1 1 auto;padding-top:8px;}
.mobile-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(--text);transition:color .2s;
}
.mobile-nav a:hover,.mobile-nav a.active{color:var(--copper);}
.mobile-nav a .chev{font-family:var(--font-mono);font-size:14px;color:var(--faint);}
.mobile-cta{flex:0 0 auto;margin-top:20px;}
body.no-scroll{overflow:hidden;}

/* ---------- 按钮 / 标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:500;line-height:1;padding:15px 28px;
  border-radius:var(--r-btn);border:1px solid transparent;
  min-height:44px;cursor:pointer;transition:all .22s cubic-bezier(.2,.7,.3,1);
}
.btn .arw{transition:transform .22s ease;}
.btn:hover .arw{transform:translateX(4px);}
.btn-primary{background:var(--ink);color:var(--on-dark);}
.btn-primary:hover{background:var(--copper);color:#fff;}
.btn-outline{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-outline:hover{border-color:var(--copper);color:var(--copper);background:rgba(182,92,46,.08);}
.btn-copper{background:var(--copper);color:#F7F4EF;}
.btn-copper:hover{background:var(--on-dark);color:var(--ink);}
.btn-block{width:100%;}
.btn[disabled]{opacity:.4;cursor:not-allowed;}
.link-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--copper);font-size:15px;font-weight:500;
  border-bottom:1px solid var(--copper);padding-bottom:2px;
  transition:all .22s;
}
.link-text:hover{font-weight:700;border-bottom-color:transparent;}
.link-text .arw{transition:transform .22s;}
.link-text:hover .arw{transform:translateX(4px);}
.chip{
  display:inline-block;font-size:12px;line-height:1;padding:6px 12px;
  border:1px solid var(--copper);color:var(--copper);
  border-radius:999px;transition:all .22s;white-space:nowrap;
}
a.chip:hover{background:var(--copper);color:#F7F4EF;}

/* ---------- Hero ---------- */
.hero{padding:72px 0 96px;}
.hero-grid{display:grid;grid-template-columns:55fr 45fr;gap:56px;align-items:center;}
.hero-copy .h1{margin-bottom:20px;}
.hero-sub{font-size:17px;line-height:1.9;color:var(--muted);max-width:30em;margin-bottom:32px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.trust-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:0;
  font-family:var(--font-mono);font-size:13px;color:var(--faint);
}
.trust-row span{padding:0 14px;border-left:1px solid var(--line);}
.trust-row span:first-child{padding-left:0;border-left:0;}
.hero-media{position:relative;}
.hero-media img{
  width:100%;aspect-ratio:16/11;object-fit:cover;
  border-radius:var(--r-card);border:1px solid var(--line);
  transition:transform .6s ease;
}
.hero-stat{
  position:absolute;right:16px;bottom:16px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:12px 18px;text-align:center;box-shadow:0 10px 24px -20px rgba(27,42,38,.5);
}
.hero-stat strong{
  display:block;font-family:var(--font-mono);font-size:26px;font-weight:500;
  line-height:1.2;color:var(--ink);
}
.hero-stat span{display:block;font-size:12px;color:var(--muted);letter-spacing:.02em;}

/* ---------- 痛点 ---------- */
.pain-grid{display:grid;grid-template-columns:3fr 9fr;gap:48px;align-items:start;}
.pain-sum{
  font-family:var(--font-serif);font-size:22px;line-height:1.55;color:var(--ink);font-weight:700;
}
.pain-list{display:grid;grid-template-columns:1fr 1fr;gap:0 40px;}
.pain-item{border-top:1px solid var(--line);padding:22px 0 26px;}
.pain-item .num{
  display:block;font-family:var(--font-mono);font-size:13px;letter-spacing:.1em;
  color:var(--copper);margin-bottom:8px;
}
.pain-item h3{font-family:var(--font-serif);font-size:20px;line-height:1.5;color:var(--ink);margin-bottom:6px;}
.pain-item p{font-size:14px;line-height:1.85;color:var(--muted);}

/* ---------- 解决方案 ---------- */
.sol-row{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  margin-bottom:64px;
}
.sol-row:last-child{margin-bottom:0;}
.sol-row.flip .sol-media{order:2;}
.sol-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-card);border:1px solid var(--line);
  transition:transform .6s ease;
}
.sol-media:hover img{transform:scale(1.03);}
.sol-body h3{font-size:22px;margin-bottom:12px;}
.sol-body p{font-size:16px;line-height:1.9;color:var(--muted);margin-bottom:20px;}
.tick-list li{
  position:relative;padding-left:18px;margin-bottom:10px;
  font-size:15px;line-height:1.8;color:var(--text);
}
.tick-list li::before{
  content:"";position:absolute;left:0;top:.7em;width:6px;height:6px;
  background:var(--copper);border-radius:1px;
}

/* ---------- 数据块 ---------- */
.stats{background:var(--ink);color:var(--on-dark);padding:80px 0;}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.stat-cell{padding:0 24px;border-left:1px solid rgba(247,244,239,.14);}
.stat-cell:first-child{border-left:0;padding-left:0;}
.stat-cell strong{
  display:block;font-family:var(--font-mono);font-weight:500;
  font-size:clamp(32px,3.4vw,46px);line-height:1.15;color:var(--on-dark);
  margin-bottom:10px;
}
.stat-cell span{display:block;font-size:13px;color:rgba(242,239,233,.62);letter-spacing:.02em;}

/* ---------- 客户证言 ---------- */
.quote-list{display:grid;gap:40px;}
.quote{
  border-left:3px solid var(--copper);padding-left:24px;
}
.quote p{
  font-family:var(--font-serif);font-size:clamp(20px,2vw,26px);line-height:1.6;
  color:var(--ink);margin-bottom:16px;font-weight:600;
}
.quote-by{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);font-family:var(--font-mono);letter-spacing:.04em;}
.quote-avatar{
  width:32px;height:32px;background:var(--copper-soft);color:var(--ink);
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:500;border-radius:2px;font-family:var(--font-serif);
  flex:0 0 32px;
}

/* ---------- 最新信息 ---------- */
.cms-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;}
.cms-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.cms-card{
  display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;transition:all .25s ease;overflow:hidden;
}
.cms-card:hover{
  border-color:var(--copper);transform:translateY(-2px);
  box-shadow:var(--shadow-card);
}
.cms-card-head{margin-bottom:16px;}
.cms-title{
  font-family:var(--font-serif);font-size:18px;line-height:1.5;font-weight:700;
  color:var(--ink);margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .22s;
}
.cms-card:hover .cms-title{color:var(--copper);}
.cms-desc{
  font-size:14px;line-height:1.85;color:var(--muted);margin-bottom:20px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.cms-foot{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:13px;color:var(--faint);letter-spacing:.06em;
}
.cms-arrow{color:var(--copper);font-family:var(--font-mono);transition:transform .22s;display:inline-block;}
.cms-card:hover .cms-arrow{transform:translateX(4px);}
.cms-empty{
  grid-column:1 / -1;border:1px dashed var(--line-dark);border-radius:var(--r-card);
  padding:56px 24px;text-align:center;background:transparent;
}
.cms-empty p{font-size:15px;color:var(--muted);margin-bottom:20px;}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start;}
.faq-intro p{margin-bottom:24px;}
.faq-item{border-top:1px solid var(--line);}
.faq-item:last-child{border-bottom:1px solid var(--line);}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  width:100%;padding:20px 0;background:none;border:0;text-align:left;
  font-size:17px;font-weight:500;color:var(--ink);cursor:pointer;min-height:44px;
  transition:color .22s;
}
.faq-q:hover{color:var(--copper);}
.faq-icon{
  flex:0 0 20px;width:20px;height:20px;position:relative;
  transition:transform .26s ease,color .26s ease;color:var(--muted);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:currentColor;
}
.faq-icon::before{width:14px;height:1.5px;transform:translate(-50%,-50%);}
.faq-icon::after{width:1.5px;height:14px;transform:translate(-50%,-50%);}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--copper);}
.faq-a{max-height:0;overflow:hidden;opacity:0;transition:max-height .26s ease,opacity .26s ease;}
.faq-item.open .faq-a{max-height:360px;opacity:1;}
.faq-a p{font-size:15px;line-height:1.9;color:var(--muted);padding:0 24px 22px 0;}

/* ---------- 结尾 CTA ---------- */
.cta{background:var(--ink);color:var(--on-dark);padding:88px 0;}
.cta-inner{text-align:center;max-width:720px;margin:0 auto;}
.cta h2{
  font-family:var(--font-serif);font-size:clamp(26px,3vw,34px);line-height:1.35;
  color:var(--on-dark);margin-bottom:16px;
}
.cta p{font-size:16px;color:rgba(242,239,233,.7);margin-bottom:32px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--on-dark);padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:56px;}
.footer-brand .brand-main{color:var(--on-dark);font-size:18px;}
.footer-brand .brand-sub{color:rgba(242,239,233,.4);}
.footer-desc{font-size:14px;line-height:1.9;color:rgba(242,239,233,.62);margin:18px 0 14px;max-width:26em;}
.footer-domain{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:rgba(242,239,233,.42);}
.footer-col h3{
  font-size:13px;font-family:var(--font-mono);letter-spacing:.16em;text-transform:uppercase;
  color:var(--copper-soft);margin-bottom:20px;font-weight:500;
}
.footer-col li{margin-bottom:12px;}
.footer-col a,.footer-col span{font-size:14px;color:rgba(242,239,233,.7);transition:color .22s;}
.footer-col a:hover{color:var(--copper);}
.footer-bottom{
  border-top:1px solid rgba(247,244,239,.14);
  padding:24px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-family:var(--font-mono);font-size:12px;color:rgba(242,239,233,.5);letter-spacing:.04em;
}

/* ---------- 动效 ---------- */
.fade-up{transition:opacity .5s ease,transform .5s ease;}
body.anim .fade-up{opacity:0;transform:translateY(12px);}
body.anim .fade-up.is-in{opacity:1;transform:none;}
body.anim .stagger > *:nth-child(2){transition-delay:60ms;}
body.anim .stagger > *:nth-child(3){transition-delay:120ms;}
body.anim .stagger > *:nth-child(4){transition-delay:180ms;}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important;scroll-behavior:auto !important;
  }
  body.anim .fade-up{opacity:1;transform:none;}
}

/* ---------- 断点 ---------- */
@media (max-width:1023px){
  .wrap{padding:0 24px;}
  .section{padding:72px 0;}
  .section-sm{padding:56px 0;}
  .nav-side{display:none;}
  .nav-grid{grid-template-columns:1fr auto 1fr;height:64px;gap:16px;}
  .nav-toggle{display:flex;justify-self:end;}
  .site-header.is-scrolled .nav-grid{height:60px;}
  .brand-main{font-size:16px;}
  .brand-sub{font-size:10px;letter-spacing:.14em;}
  .hero{padding:56px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-stat strong{font-size:22px;}
  .pain-grid{grid-template-columns:1fr;gap:28px;}
  .pain-list{grid-template-columns:1fr 1fr;gap:0 32px;}
  .sol-row{grid-template-columns:1fr;gap:28px;margin-bottom:48px;}
  .sol-row.flip .sol-media{order:0;}
  .stats{padding:64px 0;}
  .stats-grid{grid-template-columns:1fr 1fr;gap:32px 0;}
  .stat-cell{padding:0 20px;}
  .stat-cell:nth-child(odd){border-left:0;padding-left:0;}
  .stat-cell:nth-child(3),.stat-cell:nth-child(4){border-top:1px solid rgba(247,244,239,.14);padding-top:28px;}
  .cms-grid{grid-template-columns:1fr 1fr;}
  .faq-grid{grid-template-columns:1fr;gap:32px;}
  .cta{padding:64px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
}

@media (max-width:639px){
  .wrap{padding:0 20px;}
  body{font-size:16px;}
  .section{padding:56px 0;}
  .hero{padding:44px 0 56px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .trust-row{font-size:12px;gap:8px 0;}
  .trust-row span{padding:0 10px;}
  .pain-list{grid-template-columns:1fr;}
  .sol-body h3{font-size:20px;}
  .stats-grid{grid-template-columns:1fr 1fr;gap:24px 0;}
  .stat-cell{padding:0 14px;}
  .stat-cell strong{font-size:28px;}
  .cms-grid{grid-template-columns:1fr;}
  .cms-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .quote p{font-size:19px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .topbar-inner p{font-size:12px;}
  .topbar-inner{height:38px;}
}

/* roulang page: article */
:root{
  --paper:#F7F4EF;
  --card:#FFFFFF;
  --ink:#1B2A26;
  --ink-soft:#2A2E2C;
  --copper:#B65C2E;
  --copper-soft:#E8C9A8;
  --muted:#6E7671;
  --faint:#A8AEA9;
  --line:#E2DCD2;
  --line-strong:#DCD5C9;
  --on-dark:#F2EFE9;
  --danger:#A33B22;
  --r-btn:2px;
  --r-card:4px;
  --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC","SimSun",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex 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;background:var(--paper);color:var(--ink-soft);
  font-family:var(--font-sans);font-size:16px;line-height:1.9;font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;font-family:var(--font-serif);color:var(--ink);font-weight:800;line-height:1.3;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
::selection{background:var(--copper-soft);color:var(--ink);}
:focus-visible{outline:2px solid var(--copper);outline-offset:2px;}

.wrap{max-width:1180px;margin:0 auto;padding:0 32px;}
.fade-up{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease;}
.fade-up.in{opacity:1;transform:none;}
@media (prefers-reduced-motion: reduce){
  .fade-up{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(247,244,239,.92);
  border-bottom:1px solid var(--line);backdrop-filter:blur(8px);
  transition:background .2s ease,border-color .2s ease;
}
.site-header.is-scrolled{background:rgba(255,255,255,.96);border-bottom-color:var(--line-strong);}
.header-inner{
  position:relative;display:grid;grid-template-columns:1fr auto 1fr;
  align-items:center;height:84px;transition:height .2s ease;
}
.site-header.is-scrolled .header-inner{height:68px;}
.nav-side{display:flex;align-items:center;gap:32px;}
.nav-side.right{justify-content:flex-end;}
.nav-link{
  position:relative;display:inline-block;font-size:15px;font-weight:500;
  color:var(--ink-soft);padding:6px 0;transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;
  background:var(--copper);transition:width .22s ease;
}
.nav-link:hover{color:var(--copper);}
.nav-link:hover::after{width:100%;}
.nav-link.active{color:var(--copper);}
.nav-link.active::after{width:16px;height:2px;background:var(--copper);}
.brand{display:block;text-align:center;text-decoration:none;}
.brand-main{
  display:block;font-family:var(--font-serif);font-weight:800;font-size:21px;
  letter-spacing:.01em;line-height:1.25;color:var(--ink);white-space:nowrap;
}
.brand-sub{
  display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--faint);margin-top:4px;text-align:center;
}
.nav-toggle{
  display:none;position:absolute;right:0;top:50%;transform:translateY(-50%);
  width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:transparent;
}
.nav-toggle span{
  display:block;width:20px;height:1.5px;background:var(--ink);margin:0 auto;
  transition:transform .25s ease,opacity .25s ease;
}
.nav-toggle span + span{margin-top:5px;}
.nav-toggle.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}

.mobile-panel{
  display:none;position:fixed;inset:0;z-index:60;background:#fff;
  flex-direction:column;padding:20px;
}
.mobile-panel.open{display:flex;}
.mobile-panel .panel-head{display:flex;align-items:center;justify-content:space-between;height:64px;border-bottom:1px solid var(--line);}
.mobile-panel .panel-head .brand-main{font-size:18px;}
.mobile-panel .panel-close{width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);background:transparent;font-size:20px;line-height:1;color:var(--ink);}
.mobile-panel nav{display:flex;flex-direction:column;margin-top:8px;}
.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-soft);
}
.mobile-panel nav a span.arrow{font-family:var(--font-mono);color:var(--faint);font-size:14px;}
.mobile-panel nav a.active{color:var(--copper);}
.mobile-panel .panel-cta{margin-top:auto;padding-top:20px;}

/* ===== Buttons ===== */
.btn-primary,.btn-ghost,.btn-copper{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:48px;padding:13px 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:500;line-height:1.2;
  transition:background .22s cubic-bezier(.2,.7,.3,1),color .22s,border-color .22s,transform .22s;
}
.btn-primary{background:var(--ink);color:var(--on-dark);border:1px solid var(--ink);}
.btn-primary:hover{background:var(--copper);border-color:var(--copper);color:#fff;}
.btn-primary .arw{transition:transform .22s ease;}
.btn-primary:hover .arw{transform:translateX(4px);}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--ink);}
.btn-ghost:hover{color:var(--copper);border-color:var(--copper);background:rgba(182,92,46,.08);}
.btn-copper{background:var(--copper);color:#fff;border:1px solid var(--copper);}
.btn-copper:hover{background:var(--on-dark);color:var(--ink);border-color:var(--on-dark);}
.link-copper{
  color:var(--copper);font-size:14px;text-decoration:underline;
  text-underline-offset:3px;transition:font-weight .2s ease;
}
.link-copper:hover{text-decoration:none;font-weight:500;}

/* ===== Chips & tags ===== */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  border:1px solid var(--copper);color:var(--copper);
  font-size:12px;line-height:1.6;letter-spacing:.04em;
  border-radius:999px;padding:4px 12px;background:transparent;
  transition:background .2s ease,color .2s ease;
}
.chip:hover{background:var(--copper);color:#fff;}

/* ===== Breadcrumbs ===== */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:14px;color:var(--muted);padding-top:28px;
}
.crumbs a{transition:color .2s ease;}
.crumbs a:hover{color:var(--copper);}
.crumbs .sep{color:var(--faint);font-family:var(--font-mono);}
.crumbs .current{color:var(--ink);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ===== Article head ===== */
.article-head{max-width:760px;margin:34px auto 0;}
.article-title{
  font-size:clamp(28px,3.6vw,40px);line-height:1.35;
  margin-top:18px;letter-spacing:.005em;word-break:break-word;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;
  color:var(--muted);margin-top:20px;
}
.article-meta .dot{color:var(--faint);}
.article-lead{
  margin-top:24px;padding-left:20px;border-left:3px solid var(--copper);
  font-size:16px;line-height:1.95;color:var(--muted);
}

/* ===== Cover ===== */
.article-cover{max-width:980px;margin:40px auto 0;}
.article-cover img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-card);border:1px solid var(--line);
}
.article-cover figcaption{
  font-size:13px;color:var(--faint);text-align:center;margin-top:12px;
}

/* ===== Article body ===== */
.article-body{
  max-width:760px;margin:44px auto 0;
  font-size:17px;line-height:1.95;color:var(--ink-soft);word-break:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.4em;}
.article-body h2{
  position:relative;font-size:22px;line-height:1.5;
  margin:2.4em 0 .9em;padding-top:26px;
}
.article-body h2::before{
  content:"";position:absolute;top:0;left:0;width:24px;height:2px;background:var(--copper);
}
.article-body h3{font-size:18px;font-weight:700;margin:1.9em 0 .7em;}
.article-body h4{font-size:16px;font-weight:700;margin:1.6em 0 .6em;}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:1.4em;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:.6em;}
.article-body li::marker{color:var(--copper);}
.article-body blockquote{
  margin:1.8em 0;border-left:3px solid var(--copper);background:var(--card);
  padding:20px 24px;font-family:var(--font-serif);font-size:19px;line-height:1.8;color:var(--ink);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--r-card);border:1px solid var(--line);margin:1.6em 0;}
.article-body a{color:var(--copper);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{text-decoration:none;font-weight:500;}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top;}
.article-body th{color:var(--ink);background:var(--card);font-weight:600;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0;}
.article-body code{
  font-family:var(--font-mono);font-size:.9em;background:#EFEAE1;
  padding:2px 6px;border-radius:2px;
}

/* ===== Empty ===== */
.empty-state{
  max-width:760px;margin:44px auto 0;background:var(--card);
  border:1px dashed var(--line-strong);border-radius:var(--r-card);
  padding:56px 32px;text-align:center;
}
.empty-state h2{font-size:20px;margin-bottom:12px;}
.empty-state p{font-size:15px;color:var(--muted);margin-bottom:24px;}

/* ===== Tags ===== */
.tag-row{max-width:760px;margin:44px auto 0;display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  display:inline-flex;align-items:center;border:1px solid var(--line);
  border-radius:999px;padding:4px 12px;font-size:12px;color:var(--muted);
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.tag:hover{color:var(--copper);border-color:var(--copper);background:rgba(182,92,46,.06);}

.rule-line{max-width:980px;margin:44px auto 0;border-top:1px solid var(--line);}

/* ===== Related ===== */
.related{max-width:980px;margin:44px auto 0;}
.related-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px;}
.related-head h2{font-size:24px;line-height:1.35;}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.rel-card{
  display:flex;flex-direction:column;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease;
  min-height:100%;
}
.rel-card:hover{
  border-color:var(--copper);transform:translateY(-2px);
  box-shadow:0 12px 28px -18px rgba(27,42,38,.35);
}
.rel-card img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .6s ease;}
.rel-card:hover img{transform:scale(1.03);}
.rel-body{padding:24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rel-num{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--copper);}
.rel-title{font-size:18px;line-height:1.5;font-weight:700;}
.rel-card:hover .rel-title{color:var(--copper);}
.rel-desc{font-size:14px;line-height:1.8;color:var(--muted);}

/* ===== Article actions ===== */
.article-actions{
  display:flex;flex-wrap:wrap;gap:16px;justify-content:center;
  margin:48px auto 0;
}

/* ===== CTA band ===== */
.cta-band{background:var(--ink);margin-top:96px;padding:88px 0;text-align:center;}
.cta-band h2{color:var(--on-dark);font-size:clamp(24px,2.6vw,34px);line-height:1.35;}
.cta-band p{color:rgba(242,239,233,.72);font-size:15px;margin-top:14px;}
.cta-band .cta-btn{margin-top:32px;}

/* ===== Footer ===== */
.site-footer{background:var(--ink);color:var(--on-dark);padding:72px 0 0;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:48px;
  padding-bottom:56px;
}
.footer-brand .brand{text-align:left;}
.footer-brand .brand-main{color:var(--on-dark);font-size:20px;}
.footer-brand .brand-sub{color:rgba(242,239,233,.45);text-align:left;}
.footer-desc{
  font-size:14px;line-height:1.9;color:rgba(242,239,233,.7);
  margin-top:18px;max-width:300px;
}
.footer-domain{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:rgba(242,239,233,.4);margin-top:14px;
}
.footer-col h3{
  font-family:var(--font-sans);font-size:13px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--copper-soft);
  margin-bottom:18px;
}
.footer-col ul{display:grid;gap:12px;}
.footer-col a,.footer-col span{font-size:14px;color:rgba(242,239,233,.7);line-height:1.7;}
.footer-col a{transition:color .2s ease;}
.footer-col a:hover{color:var(--copper);}
.footer-bottom{
  border-top:1px solid rgba(247,244,239,.14);
  padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:16px;
  justify-content:space-between;align-items:center;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:rgba(242,239,233,.5);
}

/* ===== Responsive ===== */
@media (max-width:1023px){
  .nav-side{display:none;}
  .nav-toggle{display:block;}
  .header-inner{grid-template-columns:1fr;height:64px;}
  .site-header.is-scrolled .header-inner{height:64px;}
  .brand-main{font-size:18px;}
  .brand-sub{font-size:10px;letter-spacing:.14em;}
  .related-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
}
@media (max-width:767px){
  .wrap{padding:0 20px;}
  .crumbs{padding-top:20px;font-size:13px;}
  .crumbs .current{max-width:100%;}
  .article-head{margin-top:26px;}
  .article-lead{font-size:15px;padding-left:16px;}
  .article-body{font-size:16px;line-height:1.95;margin-top:32px;}
  .article-body h2{font-size:20px;}
  .article-body h3{font-size:17px;}
  .article-body blockquote{font-size:17px;padding:16px 18px;}
  .related-grid{grid-template-columns:1fr;}
  .related-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .article-actions{flex-direction:column;}
  .article-actions .btn-primary,.article-actions .btn-ghost{width:100%;}
  .cta-band{padding:64px 0;margin-top:72px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:40px;}
  .site-footer{padding-top:56px;}
}
@media (max-width:519px){
  .brand-main{font-size:16px;}
  .article-title{font-size:26px;}
  .empty-state{padding:40px 20px;}
}

/* roulang page: category1 */
:root{
  --paper:#F7F4EF;
  --card:#FFFFFF;
  --ink:#1B2A26;
  --copper:#B65C2E;
  --copper-soft:#E8C9A8;
  --text:#2A2E2C;
  --muted:#6E7671;
  --faint:#A8AEA9;
  --line:#E2DCD2;
  --line-dark:#DCD5C9;
  --ink-text:#F2EFE9;
  --warn:#A33B22;
  --radius:4px;
  --radius-btn:2px;
  --wrap:1180px;
  --serif:'Noto Serif SC','Source Han Serif SC','Songti SC','STSong',Georgia,serif;
  --sans:'Noto Sans SC','PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --mono:'IBM Plex Mono','SFMono-Regular',Consolas,'Liberation Mono',monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
html body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p,figure{margin:0;}
svg{display:block;}
::selection{background:var(--copper-soft);color:var(--ink);}
:focus-visible{outline:2px solid var(--copper);outline-offset:2px;}

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

/* ---------- HEADER ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(247,244,239,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  transition:border-color .2s ease,background-color .2s ease;
}
.site-header.scrolled{background:rgba(255,255,255,.96);border-bottom-color:var(--line-dark);}
.header-inner{
  max-width:var(--wrap);margin:0 auto;padding:0 32px;
  height:84px;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  transition:height .2s ease;
}
.site-header.scrolled .header-inner{height:68px;}
.nav-side{display:flex;align-items:center;gap:32px;}
.nav-side.left{justify-content:flex-start;}
.nav-side.right{justify-content:flex-end;}
.nav-link{
  position:relative;
  font-size:15px;font-weight:500;color:var(--text);
  padding:6px 0;
  transition:color .22s ease;
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;
  background:var(--copper);transition:width .22s ease;
}
.nav-link:hover{color:var(--copper);}
.nav-link:hover::after{width:100%;}
.nav-link.active{color:var(--copper);}
.nav-link.active::after{width:16px;height:2px;background:var(--copper);}
.brand{
  display:inline-flex;flex-direction:column;align-items:center;
  line-height:1.1;text-align:center;min-width:200px;
}
.brand-main{
  font-family:var(--serif);font-weight:800;font-size:21px;
  letter-spacing:.01em;color:var(--ink);white-space:nowrap;
}
.brand-sub{
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--faint);margin-top:5px;white-space:nowrap;
}
.nav-toggle{
  display:none;width:44px;height:44px;
  flex-direction:column;justify-content:center;align-items:center;gap:5px;
}
.nav-toggle span{
  display:block;width:20px;height:1.5px;background:var(--ink);
  transition:transform .22s ease,opacity .22s ease;
}
.nav-toggle.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}

.mobile-panel{
  position:fixed;top:64px;left:0;right:0;bottom:0;z-index:65;
  background:#FFFFFF;
  padding:8px 20px 32px;
  display:flex;flex-direction:column;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s;
  overflow-y:auto;
}
.mobile-panel.open{opacity:1;visibility:visible;transform:none;}
.mobile-panel nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:56px;padding:14px 0;
  border-bottom:1px solid var(--line);
  font-size:16px;color:var(--text);
}
.mobile-panel nav a.active{color:var(--copper);}
.mobile-panel nav a svg{color:var(--faint);}
.mobile-panel .mobile-cta{margin-top:auto;justify-content:center;width:100%;}

/* ---------- BUTTONS ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 28px;min-height:44px;
  font-size:15px;font-weight:500;line-height:1.4;
  border-radius:var(--radius-btn);
  transition:background-color .22s cubic-bezier(.2,.7,.3,1),color .22s cubic-bezier(.2,.7,.3,1),border-color .22s cubic-bezier(.2,.7,.3,1),transform .22s ease;
}
.btn .arrow{transition:transform .22s ease;}
.btn:hover .arrow{transform:translateX(4px);}
.btn-primary{background:var(--ink);color:var(--ink-text);}
.btn-primary:hover{background:var(--copper);color:#FFFFFF;}
.btn-ghost{background:transparent;border:1px solid var(--ink);color:var(--ink);}
.btn-ghost:hover{border-color:var(--copper);color:var(--copper);background:rgba(182,92,46,.08);}
.btn-copper{background:var(--copper);color:#FFFFFF;}
.btn-copper:hover{background:var(--ink-text);color:var(--ink);}

/* ---------- PAGE HERO ---------- */
.page-hero{padding:72px 0 56px;border-bottom:1px solid var(--line);}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--muted);margin-bottom:32px;
}
.crumb a{color:var(--muted);transition:color .2s ease;}
.crumb a:hover{color:var(--copper);}
.crumb .sep{color:var(--faint);}
.crumb .cur{color:var(--text);}
.hero-grid{
  display:grid;grid-template-columns:minmax(0,1fr) 320px;
  gap:56px;align-items:end;
}
.eyebrow{
  display:flex;align-items:center;gap:12px;
  font-family:var(--mono);font-size:12px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--copper);
  margin-bottom:18px;
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--copper);flex:none;}
h1.page-title{
  font-family:var(--serif);font-weight:800;
  font-size:clamp(28px,4vw,42px);line-height:1.28;
  letter-spacing:-.01em;color:var(--ink);
}
.hero-lead{
  margin-top:22px;max-width:720px;
  font-size:16px;line-height:1.95;color:var(--muted);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-figure{position:relative;}
.hero-figure img{
  width:100%;height:200px;object-fit:cover;
  border-radius:var(--radius);border:1px solid var(--line);
}
.hero-figure figcaption{
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;
  color:var(--faint);margin-top:10px;text-transform:uppercase;
}

/* ---------- SECTIONS ---------- */
.section{padding:96px 0;}
.section-alt{
  background:#FFFFFF;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:96px 0;
}
.section-head{max-width:760px;margin-bottom:48px;}
h2.section-title{
  font-family:var(--serif);font-weight:800;
  font-size:clamp(24px,2.4vw,34px);line-height:1.32;color:var(--ink);
}
.section-desc{margin-top:18px;font-size:16px;line-height:1.95;color:var(--muted);}

/* ---------- CARD GRID ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.info-card{
  display:flex;flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.info-card:hover{
  transform:translateY(-2px);
  border-color:var(--copper);
  box-shadow:0 12px 28px -18px rgba(27,42,38,.35);
}
.card-media{aspect-ratio:16/9;overflow:hidden;background:var(--paper);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease;}
.info-card:hover .card-media img{transform:scale(1.03);}
.card-body{
  display:flex;flex-direction:column;gap:12px;
  padding:24px;flex:1;
}
.chip{
  display:inline-flex;align-self:flex-start;align-items:center;
  padding:2px 10px;line-height:1.7;
  font-size:12px;color:var(--copper);
  border:1px solid var(--copper);border-radius:999px;
  transition:background-color .22s ease,color .22s ease;
}
.info-card:hover .chip{background:var(--copper);color:#FFFFFF;}
.card-body h3{
  font-family:var(--serif);font-weight:700;
  font-size:18px;line-height:1.5;color:var(--ink);
}
.card-body p{font-size:14px;line-height:1.9;color:var(--muted);}
.card-foot{
  margin-top:auto;padding-top:16px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
}
.card-num{
  font-family:var(--mono);font-size:13px;letter-spacing:.08em;color:var(--copper);
}
.card-foot svg{color:var(--faint);transition:transform .22s ease,color .22s ease;}
.info-card:hover .card-foot svg{transform:translateX(4px);color:var(--copper);}

/* ---------- STEPS ---------- */
.steps{border-top:1px solid var(--line);}
.step{
  display:grid;grid-template-columns:96px minmax(0,1fr);
  gap:24px;align-items:start;
  padding:28px 0;border-bottom:1px solid var(--line);
}
.step-num{
  font-family:var(--mono);font-size:20px;letter-spacing:.08em;
  color:var(--copper);line-height:1.5;
}
.step h3{
  font-family:var(--serif);font-weight:700;
  font-size:20px;line-height:1.5;color:var(--ink);margin-bottom:8px;
}
.step p{font-size:15px;line-height:1.9;color:var(--muted);max-width:780px;}

/* ---------- POINTS ---------- */
.points-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:36px 56px;}
.point{display:flex;gap:16px;}
.point .dot{width:6px;height:6px;background:var(--copper);flex:none;margin-top:12px;}
.point h3{
  font-family:var(--serif);font-weight:700;
  font-size:18px;line-height:1.5;color:var(--ink);margin-bottom:6px;
}
.point p{font-size:15px;line-height:1.9;color:var(--muted);}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:64px;align-items:start;}
.faq-aside h2{
  font-family:var(--serif);font-weight:800;
  font-size:clamp(24px,2.4vw,32px);line-height:1.32;color:var(--ink);
}
.faq-aside p{margin-top:16px;font-size:15px;line-height:1.9;color:var(--muted);}
.faq-aside .btn{margin-top:26px;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:20px 0;text-align:left;
  font-size:17px;font-weight:500;line-height:1.6;color:var(--ink);
  transition:color .22s ease;min-height:44px;
}
.faq-q:hover{color:var(--copper);}
.faq-q .icon{flex:none;color:var(--muted);transition:transform .26s ease,color .26s ease;}
.faq-item.open .faq-q{color:var(--copper);}
.faq-item.open .faq-q .icon{transform:rotate(45deg);color:var(--copper);}
.faq-a{
  max-height:0;overflow:hidden;opacity:0;
  transition:max-height .26s ease,opacity .26s ease;
}
.faq-item.open .faq-a{opacity:1;}
.faq-a p{
  padding:0 0 22px;font-size:15px;line-height:1.9;color:var(--muted);max-width:640px;
}

/* ---------- CTA ---------- */
.cta{
  background:var(--ink);color:var(--ink-text);
  padding:88px 0;text-align:center;
}
.cta h2{
  font-family:var(--serif);font-weight:800;
  font-size:clamp(26px,3vw,34px);line-height:1.32;color:var(--ink-text);
}
.cta p{
  margin-top:16px;font-size:16px;line-height:1.9;
  color:rgba(242,239,233,.72);
}
.cta .btn{margin-top:32px;}

/* ---------- FOOTER ---------- */
.site-footer{
  background:var(--ink);color:rgba(242,239,233,.72);
  padding:72px 0 0;font-size:14px;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.25fr;
  gap:40px;padding-bottom:56px;
  border-bottom:1px solid rgba(247,244,239,.14);
}
.site-footer .brand{align-items:flex-start;min-width:0;text-align:left;}
.site-footer .brand-main{color:var(--ink-text);font-size:19px;}
.site-footer .brand-sub{color:rgba(242,239,233,.45);}
.footer-desc{
  margin-top:18px;max-width:280px;
  font-size:14px;line-height:1.9;color:rgba(242,239,233,.66);
}
.footer-domain{
  margin-top:14px;font-family:var(--mono);font-size:12px;
  letter-spacing:.08em;color:rgba(242,239,233,.45);
}
.footer-col h3{
  font-family:var(--mono);font-size:13px;font-weight:500;
  letter-spacing:.14em;text-transform:uppercase;
  color:var(--copper-soft);margin-bottom:18px;
}
.footer-col ul li{margin-bottom:10px;line-height:1.8;}
.footer-col a,.footer-col span{
  color:rgba(242,239,233,.7);font-size:14px;
  transition:color .2s ease;
}
.footer-col a:hover{color:var(--copper);}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding:24px 0;
  font-family:var(--mono);font-size:12px;letter-spacing:.04em;
  color:rgba(242,239,233,.5);
}

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

/* ---------- RESPONSIVE ---------- */
@media (max-width:1023px){
  .header-inner{display:flex;justify-content:center;align-items:center;height:64px;position:relative;padding:0 20px;}
  .site-header.scrolled .header-inner{height:64px;}
  .nav-side{display:none;}
  .nav-toggle{display:flex;position:absolute;right:16px;top:50%;transform:translateY(-50%);}
  .brand{min-width:0;}
  .brand-main{font-size:18px;}
  .brand-sub{font-size:10px;letter-spacing:.14em;}
  .wrap{padding:0 20px;}
  .page-hero{padding:56px 0 44px;}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:36px;align-items:start;}
  .hero-figure{max-width:420px;}
  .hero-figure img{height:180px;}
  .section,.section-alt{padding:72px 0;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .faq-layout{grid-template-columns:minmax(0,1fr);gap:40px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px;}
  .cta{padding:72px 0;}
  .step{grid-template-columns:72px minmax(0,1fr);gap:18px;}
}
@media (max-width:640px){
  .page-hero{padding:40px 0 36px;}
  .hero-figure{display:none;}
  h1.page-title{font-size:clamp(26px,7vw,32px);}
  .hero-lead{font-size:15px;}
  .section,.section-alt{padding:56px 0;}
  .card-grid{grid-template-columns:minmax(0,1fr);}
  .points-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .step{grid-template-columns:minmax(0,1fr);gap:8px;padding:24px 0;}
  .step-num{font-size:15px;}
  .step h3{font-size:18px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:32px;padding-bottom:40px;}
  .section-head{margin-bottom:32px;}
  .hero-actions .btn{width:100%;}
  .faq-q{font-size:16px;}
  .faq-aside .btn{width:100%;}
  .cta .btn{width:100%;}
  .footer-bottom{flex-direction:column;gap:6px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important;}
}

/* roulang page: category2 */
:root{
  --paper:#F7F4EF;
  --card:#FFFFFF;
  --ink:#1B2A26;
  --copper:#B65C2E;
  --copper-soft:#E8C9A8;
  --text:#2A2E2C;
  --muted:#6E7671;
  --faint:#A8AEA9;
  --line:#E2DCD2;
  --line-dark:#DCD5C9;
  --on-dark:#F2EFE9;
  --warn:#A33B22;
  --r-sm:2px;
  --r-md:4px;
  --serif:"Noto Serif SC","Songti SC","Source Han Serif SC",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --mono:"IBM Plex Mono","Inter",ui-monospace,monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
body.locked{overflow:hidden;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--copper);outline-offset:2px;}
.wrap{max-width:1180px;margin:0 auto;padding:0 32px;}
.serif{font-family:var(--serif);font-weight:800;color:var(--ink);}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,244,239,.92);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.site-header.scrolled{background:rgba(255,255,255,.96);border-bottom-color:var(--line-dark);}
.nav-shell{
  max-width:1180px;margin:0 auto;padding:0 32px;
  height:84px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  transition:height .2s var(--ease);
}
.site-header.scrolled .nav-shell{height:68px;}
.nav-side{display:flex;gap:32px;align-items:center;}
.nav-side.left{justify-content:flex-start;}
.nav-side.right{justify-content:flex-end;}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--text);
  padding:6px 0;white-space:nowrap;
  transition:color .22s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;
  background:var(--copper);transition:width .22s var(--ease);
}
.nav-link:hover{color:var(--copper);}
.nav-link:hover::after{width:100%;}
.nav-link.active{color:var(--copper);}
.nav-link.active::after{width:16px;}
.brand{
  display:block;text-align:center;text-decoration:none;color:var(--ink);
  padding:0 18px;
}
.brand-main{
  display:block;font-family:var(--serif);font-weight:800;font-size:21px;
  line-height:1.16;letter-spacing:.01em;white-space:nowrap;
}
.brand-sub{
  display:block;font-family:var(--mono);font-size:11px;line-height:1.4;
  letter-spacing:.16em;text-transform:uppercase;color:var(--faint);margin-top:5px;
}
.nav-toggle{
  display:none;position:absolute;right:20px;top:50%;transform:translateY(-50%);
  width:44px;height:44px;border:0;background:transparent;cursor:pointer;padding:0;
}
.nav-toggle span{
  display:block;width:22px;height:1.5px;background:var(--ink);margin:5px auto;
  transition:transform .25s var(--ease),opacity .2s var(--ease);
}
.nav-toggle.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}
.mobile-panel{
  position:fixed;left:0;right:0;top:64px;bottom:0;z-index:55;
  background:#fff;border-top:1px solid var(--line);
  padding:12px 20px 32px;
  transform:translateY(-10px);opacity:0;pointer-events:none;
  transition:opacity .22s var(--ease),transform .22s var(--ease);
  overflow-y:auto;
}
.mobile-panel.open{opacity:1;transform:translateY(0);pointer-events:auto;}
.mobile-panel a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:56px;border-bottom:1px solid var(--line);
  font-size:16px;color:var(--text);
}
.mobile-panel a::after{content:"→";font-family:var(--mono);font-size:13px;color:var(--faint);}
.mobile-panel a.active{color:var(--copper);}
.mobile-panel .mobile-cta{
  margin-top:24px;display:flex;justify-content:center;align-items:center;
  background:var(--ink);color:var(--on-dark);border:1px solid var(--ink);
  border-radius:var(--r-sm);min-height:48px;font-size:15px;
}
.mobile-panel .mobile-cta::after{content:"";}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:500;line-height:1;padding:14px 28px;
  border-radius:var(--r-sm);border:1px solid transparent;cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.btn .arw{transition:transform .22s var(--ease);font-family:var(--mono);}
.btn:hover .arw{transform:translateX(4px);}
.btn-primary{background:var(--ink);color:var(--on-dark);border-color:var(--ink);}
.btn-primary:hover{background:var(--copper);border-color:var(--copper);color:#fff;}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{color:var(--copper);border-color:var(--copper);background:rgba(182,92,46,.08);}
.btn-copper{background:var(--copper);color:#fff;border-color:var(--copper);}
.btn-copper:hover{background:var(--on-dark);color:var(--ink);border-color:var(--on-dark);}
.text-link{
  color:var(--copper);font-size:14px;border-bottom:1px solid var(--copper);
  padding-bottom:2px;transition:border-color .2s var(--ease);
}
.text-link:hover{border-color:transparent;font-weight:500;}

/* ---------- shared section bits ---------- */
.section{padding:96px 0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:12px;
  font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--copper);margin-bottom:18px;
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--copper);}
.h2{font-family:var(--serif);font-weight:800;color:var(--ink);font-size:clamp(24px,2.4vw,34px);line-height:1.3;letter-spacing:.01em;}
.lede{color:var(--muted);font-size:16px;line-height:1.9;}
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* ---------- breadcrumb ---------- */
.crumb{padding-top:28px;font-size:14px;color:var(--faint);}
.crumb a{color:var(--muted);transition:color .2s var(--ease);}
.crumb a:hover{color:var(--copper);}
.crumb .sep{margin:0 8px;color:var(--line-dark);}
.crumb .cur{color:var(--text);}

/* ---------- category hero ---------- */
.cat-hero{padding:36px 0 56px;border-bottom:1px solid var(--line);}
.cat-hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:56px;align-items:end;}
.cat-title{
  font-family:var(--serif);font-weight:800;color:var(--ink);
  font-size:clamp(28px,4vw,42px);line-height:1.24;letter-spacing:.01em;margin-bottom:20px;
}
.cat-title em{font-style:normal;color:var(--copper);}
.cat-lede{max-width:720px;color:var(--muted);font-size:16px;line-height:1.95;}
.cat-hero-meta{display:flex;flex-wrap:wrap;gap:28px;margin-top:28px;}
.cat-hero-meta div{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--faint);text-transform:uppercase;}
.cat-hero-meta strong{display:block;font-family:var(--serif);font-size:20px;font-weight:800;color:var(--ink);letter-spacing:0;margin-bottom:2px;}
.cat-thumb{width:100%;height:200px;object-fit:cover;border-radius:var(--r-md);border:1px solid var(--line);}

/* ---------- row list ---------- */
.rowlist{border-top:1px solid var(--line);}
.row-item{
  display:grid;grid-template-columns:56px minmax(0,1fr) 32px;gap:20px;align-items:center;
  padding:26px 4px;border-bottom:1px solid var(--line);
  transition:background .22s var(--ease),padding-left .22s var(--ease);
}
.row-item:hover{background:rgba(255,255,255,.7);padding-left:12px;}
.row-num{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--copper);}
.row-title{font-family:var(--serif);font-size:20px;font-weight:800;color:var(--ink);line-height:1.5;transition:color .22s var(--ease);}
.row-item:hover .row-title{color:var(--copper);}
.row-desc{
  margin-top:6px;color:var(--muted);font-size:14px;line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.row-arrow{font-family:var(--mono);font-size:16px;color:var(--faint);transition:transform .22s var(--ease),color .22s var(--ease);}
.row-item:hover .row-arrow{transform:translateX(4px);color:var(--copper);}

/* ---------- points ---------- */
.points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 40px;margin-top:36px;}
.point{display:flex;gap:14px;align-items:flex-start;padding:18px 0;border-top:1px solid var(--line);}
.point-mark{flex:0 0 auto;width:6px;height:6px;background:var(--copper);margin-top:12px;}
.point h3{font-size:16px;font-weight:500;color:var(--ink);line-height:1.6;margin-bottom:4px;}
.point p{font-size:14px;color:var(--muted);line-height:1.8;}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;position:relative;margin-top:44px;}
.steps::before{content:"";position:absolute;left:0;right:0;top:15px;height:1px;background:var(--line-dark);}
.step{position:relative;padding-top:46px;}
.step-dot{
  position:absolute;top:6px;left:0;width:20px;height:20px;border-radius:999px;
  background:var(--paper);border:1px solid var(--copper);
  display:flex;align-items:center;justify-content:center;
}
.step-dot::after{content:"";width:6px;height:6px;background:var(--copper);border-radius:999px;}
.step-num{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--copper);display:block;margin-bottom:8px;}
.step h3{font-family:var(--serif);font-size:18px;font-weight:800;color:var(--ink);margin-bottom:8px;line-height:1.5;}
.step p{font-size:14px;color:var(--muted);line-height:1.85;}

/* ---------- split figure ---------- */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:64px;align-items:center;margin-top:56px;}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-md);border:1px solid var(--line);transition:transform .6s var(--ease);}
.split-media{overflow:hidden;border-radius:var(--r-md);}
.split-media:hover img{transform:scale(1.03);}
.split-body h3{font-family:var(--serif);font-size:22px;font-weight:800;color:var(--ink);line-height:1.5;margin-bottom:14px;}
.split-body p{color:var(--muted);font-size:15px;line-height:1.95;margin-bottom:18px;}
.marked li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text);padding:8px 0;}
.marked li::before{content:"";flex:0 0 auto;width:6px;height:6px;background:var(--copper);margin-top:12px;}

/* ---------- dark band ---------- */
.band{background:var(--ink);color:var(--on-dark);padding:80px 0;}
.band .eyebrow{color:var(--copper-soft);}
.band .eyebrow::before{background:var(--copper-soft);}
.band h2{font-family:var(--serif);font-weight:800;color:var(--on-dark);font-size:clamp(24px,2.4vw,32px);line-height:1.3;margin-bottom:14px;}
.band p.sub{color:rgba(242,239,233,.65);font-size:15px;max-width:640px;}
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin-top:48px;}
.stat{padding:8px 28px;border-left:1px solid rgba(247,244,239,.14);}
.stat:first-child{border-left:0;padding-left:0;}
.stat-num{font-family:var(--mono);font-size:clamp(32px,3.4vw,46px);line-height:1.05;color:var(--on-dark);letter-spacing:.02em;}
.stat-label{display:block;margin-top:10px;font-size:13px;color:rgba(242,239,233,.6);line-height:1.7;}

/* ---------- faq ---------- */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:56px;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 0;background:transparent;border:0;text-align:left;cursor:pointer;
  font-size:17px;font-weight:500;color:var(--ink);line-height:1.6;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--copper);}
.faq-icon{
  flex:0 0 auto;width:20px;height:20px;position:relative;
  transition:transform .26s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--copper);left:50%;top:50%;
}
.faq-icon::before{width:14px;height:1.5px;transform:translate(-50%,-50%);}
.faq-icon::after{width:1.5px;height:14px;transform:translate(-50%,-50%);}
.faq-item.open .faq-icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease),opacity .26s var(--ease);opacity:0;}
.faq-item.open .faq-a{opacity:1;}
.faq-a p{font-size:15px;line-height:1.9;color:var(--muted);padding:0 40px 22px 0;}

/* ---------- cta band ---------- */
.cta-band{background:var(--ink);padding:88px 0;text-align:center;}
.cta-band h2{font-family:var(--serif);font-weight:800;color:var(--on-dark);font-size:clamp(26px,3vw,34px);line-height:1.3;margin-bottom:14px;}
.cta-band p{color:rgba(242,239,233,.7);font-size:15px;margin-bottom:32px;}
.cta-band .btn-copper:hover{background:var(--on-dark);color:var(--ink);}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--on-dark);padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:48px;}
.footer-brand .brand-main{color:var(--on-dark);font-size:22px;}
.footer-brand .brand-sub{color:rgba(242,239,233,.45);}
.footer-brand{padding-top:0;}
.site-footer .brand{padding:0;text-align:left;}
.footer-desc{margin-top:18px;font-size:14px;line-height:1.9;color:rgba(242,239,233,.62);max-width:280px;}
.footer-domain{margin-top:12px;font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:rgba(242,239,233,.4);}
.footer-col h3{
  font-size:13px;font-family:var(--mono);letter-spacing:.14em;text-transform:uppercase;
  color:var(--copper-soft);margin-bottom:18px;font-weight:500;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col a,.footer-col span{font-size:14px;color:rgba(242,239,233,.7);line-height:1.7;transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--copper);}
.footer-bottom{
  margin-top:56px;padding:22px 0;border-top:1px solid rgba(247,244,239,.14);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:rgba(242,239,233,.5);
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav-side{display:none;}
  .nav-shell{display:flex;justify-content:center;height:64px;position:relative;padding:0 20px;}
  .site-header.scrolled .nav-shell{height:64px;}
  .nav-toggle{display:block;}
  .brand-main{font-size:19px;}
  .brand-sub{font-size:10px;letter-spacing:.14em;}
  .cat-hero-grid{grid-template-columns:1fr;gap:32px;}
  .cat-thumb{display:none;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .steps::before{display:none;}
  .split{grid-template-columns:1fr;gap:32px;}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat{padding:20px 24px;border-left:1px solid rgba(247,244,239,.14);}
  .stat:nth-child(odd){border-left:0;padding-left:0;}
  .faq-grid{grid-template-columns:1fr;gap:36px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:40px;}
  .section{padding:72px 0;}
}
@media (max-width:767px){
  .wrap{padding:0 20px;}
  .points{grid-template-columns:1fr;}
  .row-item{grid-template-columns:40px minmax(0,1fr) 24px;gap:14px;padding:22px 0;}
  .row-title{font-size:18px;}
  .split-media img{aspect-ratio:16/10;}
}
@media (max-width:639px){
  .section{padding:56px 0;}
  .cat-hero{padding:24px 0 44px;}
  .steps{grid-template-columns:1fr;gap:8px;}
  .step{padding-top:36px;border-top:1px solid var(--line);}
  .step-dot{top:-10px;left:0;}
  .band{padding:56px 0;}
  .stat-grid{grid-template-columns:1fr;}
  .stat{border-left:0;padding-left:0;border-top:1px solid rgba(247,244,239,.14);padding-top:18px;padding-bottom:18px;}
  .stat:first-child{border-top:0;padding-top:0;}
  .cta-band{padding:64px 0;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{font-size:11px;}
  .btn{padding:13px 22px;font-size:14px;min-height:44px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category3 */
:root{
    --paper:#F7F4EF;
    --card:#FFFFFF;
    --ink:#1B2A26;
    --copper:#B65C2E;
    --copper-soft:#E8C9A8;
    --text:#2A2E2C;
    --muted:#6E7671;
    --faint:#A8AEA9;
    --line:#E2DCD2;
    --line-strong:#DCD5C9;
    --cream:#F2EFE9;
    --err:#A33B22;
    --r-s:2px;
    --r-m:4px;
    --serif:"Noto Serif SC","Songti SC","Source Han Serif SC",Georgia,serif;
    --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
    --mono:"IBM Plex Mono","SFMono-Regular",Menlo,Consolas,monospace;
    --ease:cubic-bezier(.2,.7,.3,1);
  }

  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  html body{
    margin:0;
    background:var(--paper);
    color:var(--text);
    font-family:var(--sans);
    font-size:16px;
    line-height:1.9;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  html body.no-scroll{overflow:hidden;}
  img{display:block;max-width:100%;height:auto;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;cursor:pointer;border:0;background:none;color:inherit;}
  h1,h2,h3,h4{margin:0;font-family:var(--serif);color:var(--ink);font-weight:800;}
  p{margin:0;}
  ul,ol{margin:0;padding:0;list-style:none;}
  figure{margin:0;}
  ::selection{background:var(--copper-soft);color:var(--ink);}

  .wrap{
    width:100%;
    max-width:1180px;
    margin:0 auto;
    padding:0 32px;
  }
  .mono{font-family:var(--mono);letter-spacing:.08em;}

  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:10px;
    font-family:var(--mono);
    font-size:12px;
    letter-spacing:.16em;
    text-transform:uppercase;
    color:var(--copper);
    margin-bottom:18px;
  }
  .eyebrow::before{
    content:"";
    width:24px;
    height:1px;
    background:var(--copper);
    display:inline-block;
  }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    gap:8px;
    min-height:48px;
    padding:13px 28px;
    border-radius:var(--r-s);
    font-size:15px;
    font-weight:500;
    line-height:1.2;
    transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
  }
  .btn .arw{transition:transform .22s var(--ease);display:inline-block;}
  .btn:hover .arw{transform:translateX(4px);}
  .btn-primary{
    background:var(--ink);
    color:var(--cream);
    border:1px solid var(--ink);
  }
  .btn-primary:hover{background:var(--copper);border-color:var(--copper);color:#FFF8F1;}
  .btn-ghost{
    background:transparent;
    color:var(--ink);
    border:1px solid var(--ink);
  }
  .btn-ghost:hover{
    color:var(--copper);
    border-color:var(--copper);
    background:rgba(182,92,46,.08);
  }
  .btn-copper{
    background:var(--copper);
    color:#FFF7F0;
    border:1px solid var(--copper);
  }
  .btn-copper:hover{background:var(--cream);color:var(--ink);border-color:var(--cream);}
  .btn:focus-visible,
  .nav-link:focus-visible,
  .faq-q:focus-visible,
  .mcard a:focus-visible,
  .foot-link:focus-visible,
  .nav-toggle:focus-visible{
    outline:2px solid var(--copper);
    outline-offset:2px;
  }

  /* ---------- 通用 chip / 标签 ---------- */
  .chip{
    display:inline-block;
    border:1px solid var(--copper);
    color:var(--copper);
    font-size:12px;
    line-height:1.4;
    padding:4px 10px;
    border-radius:999px;
    letter-spacing:.04em;
    transition:background-color .2s var(--ease),color .2s var(--ease);
  }
  .chip:hover{background:var(--copper);color:#FFF8F1;}

  /* ---------- 顶部导航 ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:100;
    background:rgba(247,244,239,.94);
    backdrop-filter:blur(8px);
    -webkit-backdrop-filter:blur(8px);
    border-bottom:1px solid var(--line);
    transition:background-color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .site-header.is-scrolled{
    background:rgba(255,255,255,.96);
    border-bottom-color:var(--line-strong);
    box-shadow:0 10px 24px -22px rgba(27,42,38,.55);
  }
  .header-inner{
    display:grid;
    grid-template-columns:1fr auto 1fr;
    align-items:center;
    gap:24px;
    height:84px;
    transition:height .2s var(--ease);
  }
  .site-header.is-scrolled .header-inner{height:68px;}

  .nav-side{display:flex;align-items:center;gap:32px;}
  .nav-left{justify-content:flex-start;}
  .nav-right{justify-content:flex-end;}
  .nav-link{
    position:relative;
    display:inline-block;
    padding:6px 0;
    font-size:15px;
    font-weight:500;
    color:var(--text);
    white-space:nowrap;
    transition:color .2s var(--ease);
  }
  .nav-link::after{
    content:"";
    position:absolute;
    left:0;
    bottom:0;
    height:1px;
    width:0;
    background:var(--copper);
    transition:width .22s var(--ease);
  }
  .nav-link:hover{color:var(--copper);}
  .nav-link:hover::after{width:100%;}
  .nav-link.current{color:var(--copper);}
  .nav-link.current::after{width:16px;height:2px;background:var(--copper);}

  .brand{
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:4px;
    width:236px;
    text-align:center;
    white-space:nowrap;
  }
  .brand-main{
    font-family:var(--serif);
    font-weight:800;
    font-size:21px;
    letter-spacing:.01em;
    color:var(--ink);
    line-height:1.25;
  }
  .brand-sub{
    font-family:var(--mono);
    font-size:11px;
    letter-spacing:.16em;
    text-transform:uppercase;
    color:var(--faint);
    line-height:1;
  }

  .nav-toggle{
    display:none;
    width:44px;
    height:44px;
    align-items:center;
    justify-content:center;
    flex-direction:column;
    gap:5px;
    position:absolute;
    right:20px;
    top:50%;
    transform:translateY(-50%);
    border-radius:var(--r-s);
  }
  .nav-toggle span{
    display:block;
    width:22px;
    height:1.5px;
    background:var(--ink);
    transition:transform .24s var(--ease),opacity .2s var(--ease);
  }
  body.menu-open .nav-toggle span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
  body.menu-open .nav-toggle span:nth-child(2){opacity:0;}
  body.menu-open .nav-toggle span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}

  .mobile-panel{
    display:none;
    position:fixed;
    left:0;right:0;top:64px;bottom:0;
    z-index:95;
    background:#fff;
    padding:8px 20px 28px;
    flex-direction:column;
    overflow-y:auto;
  }
  body.menu-open .mobile-panel{display:flex;}
  .mobile-panel a.mp-link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    min-height:56px;
    padding:0 4px;
    font-size:16px;
    border-bottom:1px solid var(--line);
    color:var(--text);
  }
  .mobile-panel a.mp-link.current{color:var(--copper);font-weight:500;}
  .mobile-panel a.mp-link .arw{color:var(--faint);font-size:14px;}
  .mobile-panel .mp-foot{margin-top:auto;padding-top:28px;}
  .mobile-panel .mp-foot .btn{width:100%;justify-content:center;}

  /* ---------- 分类页头部 ---------- */
  .page-hero{
    padding:72px 0 56px;
    border-bottom:1px solid var(--line);
    background:
      radial-gradient(circle at 88% 12%, rgba(232,201,168,.35), transparent 46%),
      var(--paper);
  }
  .crumbs{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:14px;
    color:var(--muted);
    margin-bottom:28px;
    flex-wrap:wrap;
  }
  .crumbs a{transition:color .2s var(--ease);}
  .crumbs a:hover{color:var(--copper);}
  .crumbs .sep{color:var(--faint);}
  .crumbs .crumb-current{color:var(--ink);}

  .hero-grid{
    display:grid;
    grid-template-columns:minmax(0,1fr) 320px;
    gap:56px;
    align-items:start;
  }
  .page-title{
    font-size:clamp(28px,4vw,42px);
    line-height:1.28;
    letter-spacing:.01em;
    margin-bottom:20px;
  }
  .page-title em{
    font-style:normal;
    color:var(--copper);
  }
  .lede{
    font-size:16px;
    line-height:1.95;
    color:var(--muted);
    max-width:720px;
    margin-bottom:24px;
  }
  .hero-meta{
    display:flex;
    flex-wrap:wrap;
    gap:10px 18px;
    font-family:var(--mono);
    font-size:12.5px;
    color:var(--faint);
    letter-spacing:.1em;
  }
  .hero-meta span{display:inline-flex;align-items:center;gap:10px;}
  .hero-meta span + span::before{
    content:"";
    display:inline-block;
    width:1px;height:12px;
    background:var(--line-strong);
    margin-right:8px;
  }
  .hero-thumb{
    border:1px solid var(--line);
    border-radius:var(--r-m);
    overflow:hidden;
    background:var(--card);
  }
  .hero-thumb img{
    width:100%;
    height:200px;
    object-fit:cover;
    transition:transform .6s var(--ease);
  }
  .hero-thumb:hover img{transform:scale(1.03);}
  .hero-thumb figcaption{
    padding:10px 14px;
    font-size:12px;
    color:var(--faint);
    font-family:var(--mono);
    letter-spacing:.08em;
    border-top:1px solid var(--line);
  }

  /* ---------- 板块通用 ---------- */
  .section{padding:96px 0;}
  .section--tight{padding:72px 0;}
  .section-head{margin-bottom:40px;}
  .section-title{
    font-size:clamp(24px,2.4vw,34px);
    line-height:1.32;
    margin-bottom:16px;
  }
  .section-sub{
    color:var(--muted);
    font-size:15.5px;
    max-width:660px;
  }

  /* ---------- 错落双列 ---------- */
  .masonry{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:32px;
    align-items:start;
  }
  .masonry-col{display:grid;gap:32px;}
  .masonry-col.right{margin-top:56px;}

  .mcard{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-m);
    overflow:hidden;
    transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
  }
  .mcard:hover{
    transform:translateY(-2px);
    border-color:var(--copper);
    box-shadow:0 12px 28px -18px rgba(27,42,38,.35);
  }
  .mcard:hover .mcard-title{color:var(--copper);}
  .mcard-media{overflow:hidden;border-bottom:1px solid var(--line);}
  .mcard-media img{
    width:100%;
    aspect-ratio:4/3;
    object-fit:cover;
    transition:transform .6s var(--ease);
  }
  .mcard:hover .mcard-media img{transform:scale(1.03);}
  .mcard-body{padding:24px;}
  .mcard-index{
    font-family:var(--mono);
    font-size:12px;
    letter-spacing:.14em;
    color:var(--copper);
    display:block;
    margin-bottom:12px;
  }
  .mcard-title{
    font-size:20px;
    line-height:1.5;
    margin:12px 0 10px;
    transition:color .22s var(--ease);
  }
  .mcard-text{
    font-size:14.5px;
    line-height:1.85;
    color:var(--muted);
  }
  .mcard--text{
    background:var(--cream);
    border-color:var(--line-strong);
    padding:32px;
  }
  .mcard--text .mcard-title{font-size:22px;margin-top:14px;}
  .mcard--text .mcard-text{font-size:15px;}

  /* ---------- 要点清单 ---------- */
  .checklist-band{
    background:var(--card);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
  }
  .checklist-grid{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:1px;
    background:var(--line);
    border:1px solid var(--line);
    border-radius:var(--r-m);
    overflow:hidden;
  }
  .check-item{
    background:var(--card);
    padding:28px 26px;
    display:flex;
    gap:14px;
    align-items:flex-start;
  }
  .check-mark{
    flex:0 0 auto;
    width:6px;height:6px;
    margin-top:11px;
    background:var(--copper);
    border-radius:1px;
  }
  .check-item h3{
    font-size:17px;
    margin-bottom:6px;
    line-height:1.5;
  }
  .check-item p{
    font-size:14.5px;
    color:var(--muted);
    line-height:1.85;
  }

  /* ---------- 流程 ---------- */
  .steps{
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:0;
    border-top:1px solid var(--line-strong);
  }
  .step{
    padding:28px 24px 8px 0;
    border-right:1px solid var(--line);
  }
  .step:last-child{border-right:0;}
  .step-num{
    font-family:var(--mono);
    font-size:13px;
    letter-spacing:.14em;
    color:var(--copper);
    display:block;
    margin-bottom:14px;
  }
  .step h3{
    font-size:18px;
    line-height:1.5;
    margin-bottom:8px;
  }
  .step p{
    font-size:14px;
    color:var(--muted);
    line-height:1.85;
  }

  /* ---------- FAQ ---------- */
  .faq-layout{
    display:grid;
    grid-template-columns:minmax(0,4fr) minmax(0,8fr);
    gap:56px;
    align-items:start;
  }
  .faq-aside .btn{margin-top:24px;}
  .faq-list{border-top:1px solid var(--line);}
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:20px 0;
    text-align:left;
    font-family:var(--sans);
    font-size:17px;
    font-weight:500;
    color:var(--ink);
    line-height:1.6;
    transition:color .2s var(--ease);
  }
  .faq-q:hover{color:var(--copper);}
  .faq-icon{
    flex:0 0 auto;
    width:20px;height:20px;
    position:relative;
    transition:transform .26s var(--ease);
  }
  .faq-icon::before,
  .faq-icon::after{
    content:"";
    position:absolute;
    left:50%;top:50%;
    background:var(--muted);
    transform:translate(-50%,-50%);
    transition:background-color .22s var(--ease);
  }
  .faq-icon::before{width:14px;height:1.5px;}
  .faq-icon::after{width:1.5px;height:14px;}
  .faq-item.open .faq-icon{transform:rotate(45deg);}
  .faq-item.open .faq-icon::before,
  .faq-item.open .faq-icon::after{background:var(--copper);}
  .faq-item.open .faq-q{color:var(--copper);}
  .faq-a{
    max-height:0;
    overflow:hidden;
    opacity:0;
    transition:max-height .26s var(--ease),opacity .26s var(--ease),padding .26s var(--ease);
  }
  .faq-item.open .faq-a{opacity:1;}
  .faq-a p{
    font-size:15px;
    line-height:1.9;
    color:var(--muted);
    padding:0 40px 22px 0;
  }

  /* ---------- CTA ---------- */
  .cta-band{
    background:var(--ink);
    padding:88px 0;
    text-align:center;
  }
  .cta-band h2{
    color:var(--cream);
    font-size:clamp(26px,3vw,34px);
    line-height:1.35;
    margin-bottom:14px;
  }
  .cta-band p{
    color:rgba(242,239,233,.7);
    font-size:15px;
    margin-bottom:32px;
  }
  .cta-band .btn-copper{min-height:50px;}

  /* ---------- 页脚 ---------- */
  .site-footer{
    background:var(--ink);
    color:var(--cream);
    padding:72px 0 0;
    border-top:1px solid rgba(247,244,239,.14);
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.4fr 1fr 1fr 1.2fr;
    gap:40px;
    padding-bottom:56px;
    border-bottom:1px solid rgba(247,244,239,.14);
  }
  .footer-brand .brand{gap:6px;margin-bottom:18px;width:auto;align-items:flex-start;}
  .footer-brand .brand-main{color:var(--cream);font-size:20px;}
  .footer-brand .brand-sub{color:rgba(242,239,233,.45);}
  .footer-desc{
    font-size:14px;
    line-height:1.9;
    color:rgba(242,239,233,.68);
    margin-bottom:14px;
    max-width:280px;
  }
  .footer-domain{
    font-family:var(--mono);
    font-size:12px;
    letter-spacing:.1em;
    color:rgba(242,239,233,.42);
  }
  .footer-col h3{
    font-family:var(--sans);
    font-size:13px;
    font-weight:600;
    letter-spacing:.14em;
    text-transform:uppercase;
    color:var(--copper-soft);
    margin-bottom:18px;
  }
  .footer-col ul li{margin-bottom:12px;}
  .footer-col ul li a,
  .footer-col ul li span{
    font-size:14px;
    color:rgba(242,239,233,.72);
    line-height:1.8;
    transition:color .2s var(--ease);
  }
  .footer-col ul li a:hover{color:var(--copper);}
  .footer-bottom{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    flex-wrap:wrap;
    padding:22px 0 26px;
    font-family:var(--mono);
    font-size:12px;
    letter-spacing:.08em;
    color:rgba(242,239,233,.5);
  }

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

  @media (prefers-reduced-motion: reduce){
    html{scroll-behavior:auto;}
    .reveal{opacity:1;transform:none;transition:none;}
    *{animation:none !important;transition:none !important;}
  }

  /* ---------- 响应式 ---------- */
  @media (max-width:1023px){
    .nav-side{display:none;}
    .nav-toggle{display:flex;}
    .header-inner{
      display:flex;
      align-items:center;
      justify-content:center;
      height:64px;
      position:relative;
      gap:0;
    }
    .site-header.is-scrolled .header-inner{height:64px;}
    .brand{width:auto;}
    .brand-main{font-size:19px;}
    .brand-sub{font-size:10px;}
    .section{padding:72px 0;}
    .section--tight{padding:56px 0;}
    .page-hero{padding:52px 0 44px;}
    .hero-grid{grid-template-columns:1fr;gap:32px;}
    .hero-thumb{max-width:360px;}
    .faq-layout{grid-template-columns:1fr;gap:32px;}
    .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
    .step{border-bottom:1px solid var(--line);padding-bottom:26px;}
    .step:nth-child(2n){border-right:0;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  }

  @media (max-width:767px){
    .wrap{padding:0 20px;}
    .masonry{grid-template-columns:1fr;}
    .masonry-col.right{margin-top:0;}
    .checklist-grid{grid-template-columns:1fr;}
    .cta-band{padding:64px 0;}
    .site-footer{padding-top:56px;}
    .footer-grid{grid-template-columns:1fr;gap:32px;}
    .footer-bottom{font-size:11.5px;}
  }

  @media (max-width:519px){
    .steps{grid-template-columns:1fr;}
    .step{border-right:0;}
    .mcard--text{padding:24px;}
    .mcard-body{padding:22px;}
    .mcard-title{font-size:19px;}
    .mcard--text .mcard-title{font-size:20px;}
    .hero-meta{font-size:11.5px;gap:8px 12px;}
    .page-title{font-size:26px;}
    .btn{width:100%;justify-content:center;}
    .cta-band .btn-copper{max-width:320px;margin:0 auto;}
  }