/* roulang page: index */
:root{
  --ink:#14120F;
  --ember:#C05A2B;
  --ember-deep:#A64A22;
  --pine:#3F5B54;
  --paper:#F7F4EF;
  --sand:#EDE7DE;
  --line:#DAD3C8;
  --body:#4A453E;
  --muted:#8A837A;
  --on-dark:#F7F4EF;
  --focus:rgba(192,90,43,.35);
  --radius-s:6px;
  --radius-m:10px;
  --shadow-hover:0 12px 32px rgba(20,18,15,.08);
  --ease:cubic-bezier(.2,.7,.3,1);

  --bs-primary:#C05A2B;
  --bs-primary-rgb:192,90,43;
  --bs-body-color:#4A453E;
  --bs-body-bg:#F7F4EF;
  --bs-border-color:#DAD3C8;
  --bs-link-color:#14120F;
  --bs-link-hover-color:#C05A2B;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --bs-body-font-family:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--paper);color:var(--body);
  font-family:var(--bs-body-font-family);font-size:16.5px;line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--ember);}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:none;box-shadow:0 0 0 3px var(--focus);border-radius:var(--radius-s);}
::selection{background:rgba(192,90,43,.18);}

/* ============ 布局骨架 ============ */
.container{max-width:1200px;}
.main-shell{margin-left:240px;min-height:100vh;display:flex;flex-direction:column;}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:40px;}
.section-head p{color:var(--muted);font-size:14.5px;max-width:520px;}
h2.section-title{font-size:clamp(26px,3vw,38px);font-weight:700;line-height:1.25;}
.eyebrow{font-size:12px;color:var(--ember);font-weight:600;letter-spacing:.04em;margin-bottom:14px;}
.lead{font-size:16.5px;line-height:1.85;color:var(--body);}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ============ 侧边导航 ============ */
.app-sidebar{
  position:fixed;top:0;left:0;bottom:0;width:240px;z-index:1040;
  background:var(--ink);color:var(--on-dark);
  display:flex;flex-direction:column;
  padding:26px 0 20px;overflow:hidden;
}
.brand{display:flex;flex-direction:column;gap:2px;padding:0 22px 22px;border-bottom:1px solid rgba(247,244,239,.12);}
.brand .brand-main{font-size:22px;font-weight:800;color:var(--on-dark);letter-spacing:.02em;line-height:1.2;white-space:nowrap;}
.brand .brand-sub{font-size:11.5px;color:rgba(247,244,239,.55);letter-spacing:.22em;white-space:nowrap;}
.side-nav{display:flex;flex-direction:column;gap:2px;margin-top:22px;flex:1 1 auto;}
.side-link{
  display:flex;align-items:center;gap:12px;height:44px;padding:0 22px;
  color:rgba(247,244,239,.7);font-size:15px;position:relative;
  border-left:3px solid transparent;white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.side-link .dot{width:6px;height:6px;border-radius:50%;background:rgba(247,244,239,.35);flex:0 0 auto;transition:background .18s var(--ease);}
.side-link:hover{color:var(--on-dark);background:rgba(247,244,239,.06);}
.side-link:hover .dot{background:var(--ember);}
.side-link.active{color:var(--on-dark);font-weight:600;border-left-color:var(--ember);background:rgba(247,244,239,.07);}
.side-link.active .dot{background:var(--ember);}
.side-foot{padding:18px 22px 0;border-top:1px solid rgba(247,244,239,.12);}
.side-foot .btn{width:100%;justify-content:center;}
.side-foot .note{font-size:12px;color:rgba(247,244,239,.45);margin-top:12px;line-height:1.7;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-s);font-size:15px;font-weight:600;line-height:1;
  padding:14px 26px;border:1px solid transparent;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn .arrow{transition:transform .18s var(--ease);}
.btn:hover .arrow{transform:translateX(3px);}
.btn-ember{background:var(--ember);color:var(--on-dark);border-color:var(--ember);}
.btn-ember:hover{background:var(--ember-deep);border-color:var(--ember-deep);color:#fff;transform:translateY(-1px);}
.btn-ember:active{transform:translateY(0);background:var(--ember-deep);}
.btn-outline-ink{background:transparent;color:var(--ink);border:1.5px solid var(--ink);}
.btn-outline-ink:hover{background:var(--ink);color:var(--on-dark);transform:translateY(-1px);}
.btn-outline-ink:active{transform:translateY(0);}
.btn-sm{padding:10px 18px;font-size:13.5px;}
.btn:disabled,.btn.disabled{opacity:.45;pointer-events:none;}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--ink);}
.link-more:hover{color:var(--ember);}
.link-more:hover .arrow{transform:translateX(3px);}
.link-more .arrow{transition:transform .18s var(--ease);}

/* ============ 徽章 / 标签 ============ */
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--sand);color:var(--ink);font-size:12px;font-weight:600;
  padding:4px 12px;border-radius:999px;line-height:1.6;white-space:nowrap;
}
.badge-soft::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--ember);flex:0 0 auto;}
.badge-line{
  display:inline-flex;align-items:center;gap:6px;background:transparent;
  border:1px solid var(--line);color:var(--muted);font-size:12px;
  padding:4px 12px;border-radius:999px;line-height:1.6;white-space:nowrap;
}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;color:var(--on-dark);min-height:78vh;display:flex;align-items:center;padding:96px 0 88px;}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;transform:scale(1.02);}
.hero-bg::after{content:"";position:absolute;inset:0;background:rgba(20,18,15,.68);}
.hero .container{position:relative;z-index:2;}
.hero .eyebrow{color:#E2A883;letter-spacing:.02em;}
.hero h1{color:var(--on-dark);font-size:clamp(34px,5.2vw,62px);font-weight:800;line-height:1.12;letter-spacing:-.02em;max-width:15em;}
.hero-sub{margin-top:20px;font-size:clamp(15px,1.5vw,19px);color:rgba(247,244,239,.86);max-width:32em;}
.hero-lead{margin-top:18px;font-size:15px;line-height:1.9;color:rgba(247,244,239,.66);max-width:38em;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-actions .btn-outline-ink{color:var(--on-dark);border-color:rgba(247,244,239,.6);}
.hero-actions .btn-outline-ink:hover{background:var(--on-dark);color:var(--ink);border-color:var(--on-dark);}
.hero-note{margin-top:22px;font-size:12.5px;color:rgba(247,244,239,.5);font-variant-numeric:tabular-nums;}
.hero-figure{margin:0;border-radius:var(--radius-m);overflow:hidden;border:1px solid rgba(247,244,239,.18);aspect-ratio:4/5;background:rgba(247,244,239,.06);}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.fade-up{opacity:0;transform:translateY(12px);animation:fadeUp .56s var(--ease) forwards;}
.fade-up:nth-child(2){animation-delay:.06s;}
.fade-up:nth-child(3){animation-delay:.12s;}
.fade-up:nth-child(4){animation-delay:.18s;}
@keyframes fadeUp{to{opacity:1;transform:none;}}

/* ============ 三步上手 ============ */
.step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.step-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-m);padding:28px 26px;transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);}
.step-card:hover{transform:translateY(-2px);border-color:rgba(20,18,15,.2);box-shadow:var(--shadow-hover);}
.step-num{font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;font-size:28px;font-weight:600;color:var(--ember);font-variant-numeric:tabular-nums;line-height:1;}
.step-card h3{font-size:20px;font-weight:600;line-height:1.4;margin-top:16px;}
.step-card p{margin-top:10px;font-size:14.5px;line-height:1.85;color:var(--muted);}
.step-card:hover h3{color:var(--ember);}

/* ============ 分类入口 ============ */
.cat-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:24px;}
.cat-card{
  grid-column:span 2;display:flex;flex-direction:column;overflow:hidden;
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-m);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.cat-card:nth-child(1),.cat-card:nth-child(2){grid-column:span 3;}
.cat-card:hover{transform:translateY(-2px);border-color:rgba(20,18,15,.2);box-shadow:var(--shadow-hover);}
.cat-thumb{aspect-ratio:16/10;overflow:hidden;background:var(--sand);}
.cat-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .26s var(--ease);}
.cat-card:hover .cat-thumb img{transform:scale(1.02);}
.cat-body{padding:24px 24px 26px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.cat-body h3{font-size:21px;font-weight:600;line-height:1.4;}
.cat-card:hover h3{color:var(--ember);}
.cat-body p{font-size:14.5px;color:var(--muted);line-height:1.85;}
.cat-body .link-more{margin-top:auto;padding-top:8px;}

/* ============ 证明 ============ */
.proof-list{display:flex;flex-direction:column;}
.proof-item{display:flex;gap:16px;padding:22px 0;border-bottom:1px solid var(--line);}
.proof-item:first-child{padding-top:0;}
.proof-dot{width:8px;height:8px;border-radius:50%;background:var(--pine);flex:0 0 auto;margin-top:10px;}
.proof-item .t{font-size:17px;font-weight:600;color:var(--ink);line-height:1.6;}
.proof-item .d{font-size:14.5px;color:var(--muted);margin-top:4px;line-height:1.8;}
.proof-figure{border-radius:var(--radius-m);overflow:hidden;aspect-ratio:16/10;border:1px solid var(--line);background:var(--sand);}
.proof-figure img{width:100%;height:100%;object-fit:cover;}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:none;border:0;text-align:left;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;cursor:pointer;
  font-size:18px;font-weight:600;color:var(--ink);line-height:1.6;
  transition:color .18s var(--ease);
}
.faq-q:hover{color:var(--ember);}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 auto;transition:transform .22s var(--ease);}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--ember);border-radius:1px;}
.faq-icon::before{left:0;top:7px;width:16px;height:2px;}
.faq-icon::after{left:7px;top:0;width:2px;height:16px;}
.faq-item.open .faq-icon{transform:rotate(45deg);}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .24s var(--ease);}
.faq-item.open .faq-a{grid-template-rows:1fr;}
.faq-a-inner{overflow:hidden;}
.faq-a-box{background:var(--sand);border-radius:8px;padding:20px 22px;margin-bottom:22px;font-size:15px;line-height:1.9;color:var(--body);}

/* ============ CTA 表单 ============ */
.cta-band{background:var(--ink);color:var(--on-dark);}
.cta-band h2{color:var(--on-dark);}
.cta-band .lead{color:rgba(247,244,239,.7);}
.cta-points{margin-top:26px;display:flex;flex-direction:column;gap:12px;}
.cta-points li{display:flex;gap:10px;font-size:14.5px;color:rgba(247,244,239,.75);line-height:1.8;}
.cta-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--ember);flex:0 0 auto;margin-top:9px;}
.cta-note{margin-top:28px;padding-top:20px;border-top:1px solid rgba(247,244,239,.16);font-size:13px;color:rgba(247,244,239,.55);line-height:1.9;}
.apply-form{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-m);padding:28px;color:var(--body);}
.form-row{margin-bottom:18px;}
.form-row label{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:8px;}
.form-control,.form-select{
  height:46px;border-radius:var(--radius-s);border:1px solid var(--line);
  background:#fff;color:var(--ink);font-size:15px;padding:0 14px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
textarea.form-control{height:auto;min-height:112px;padding:12px 14px;line-height:1.8;resize:vertical;}
.form-control::placeholder{color:#A9A29A;}
.form-control:focus,.form-select:focus{border-color:var(--ember);box-shadow:0 0 0 3px var(--focus);background:#fff;color:var(--ink);}
.form-tip{font-size:12.5px;color:var(--muted);margin-top:8px;}
.form-hint{margin-top:14px;font-size:13px;color:var(--muted);}
.form-ok{display:none;margin-top:16px;padding:14px 16px;border-radius:8px;background:var(--sand);color:var(--ink);font-size:14px;border-left:3px solid var(--ember);}
.form-ok.show{display:block;}

/* ============ 最新信息 ============ */
.news-list{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.news-item{
  display:flex;flex-direction:column;gap:10px;padding:24px;
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-m);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.news-item:hover{transform:translateY(-2px);border-color:rgba(20,18,15,.2);box-shadow:var(--shadow-hover);}
.news-item h3{font-size:19px;font-weight:600;line-height:1.5;color:var(--ink);transition:color .18s var(--ease);}
.news-item:hover h3{color:var(--ember);}
.news-excerpt{
  font-size:14.5px;color:var(--muted);line-height:1.85;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:6px;}
.news-meta time{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;}
.news-arrow{color:var(--ember);font-size:16px;transition:transform .18s var(--ease);}
.news-item:hover .news-arrow{transform:translateX(3px);}
.news-empty{
  border:1px dashed var(--line);border-radius:var(--radius-m);
  padding:44px 24px;text-align:center;background:rgba(237,231,222,.4);
}
.news-empty p{font-size:15px;color:var(--muted);margin-bottom:18px;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:rgba(247,244,239,.72);margin-top:auto;padding:72px 0 28px;}
.footer-brand .brand-main{font-size:20px;font-weight:800;color:var(--on-dark);line-height:1.3;}
.footer-brand .brand-sub{font-size:11.5px;letter-spacing:.22em;color:rgba(247,244,239,.45);margin-top:2px;}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.9;color:rgba(247,244,239,.55);max-width:270px;}
.footer-col h4{font-size:13px;font-weight:600;color:rgba(247,244,239,.7);letter-spacing:.04em;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{color:rgba(247,244,239,.62);font-size:14px;}
.footer-col a:hover{color:var(--ember);}
.footer-col li{font-size:14px;color:rgba(247,244,239,.62);line-height:1.75;}
.footer-bottom{margin-top:52px;padding-top:22px;border-top:1px solid rgba(247,244,239,.14);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:12.5px;color:rgba(247,244,239,.42);}
.footer-bottom .links{display:flex;gap:18px;flex-wrap:wrap;}
.footer-bottom a{color:rgba(247,244,239,.55);}
.footer-bottom a:hover{color:var(--ember);}

/* ============ 移动端顶部条 & 抽屉 ============ */
.mobile-bar{
  position:fixed;top:0;left:0;right:0;height:56px;z-index:1035;
  background:var(--ink);display:flex;align-items:center;justify-content:space-between;
  padding:0 18px;border-bottom:1px solid rgba(247,244,239,.12);
}
.mobile-bar .brand-m{display:flex;align-items:baseline;gap:6px;color:var(--on-dark);}
.mobile-bar .brand-m span{font-size:17px;font-weight:800;}
.mobile-bar .brand-m em{font-style:normal;font-size:10.5px;letter-spacing:.18em;color:rgba(247,244,239,.5);}
.hamburger{width:44px;height:44px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;background:none;border:0;padding:0;}
.hamburger span{display:block;width:20px;height:2px;background:var(--on-dark);border-radius:1px;}
.drawer{background:var(--ink)!important;color:var(--on-dark);width:280px!important;}
.drawer .offcanvas-body{padding:0;}
.drawer .brand{padding:24px 22px 22px;}
.drawer .side-nav{margin-top:16px;flex:0 1 auto;}
.drawer .drawer-cta{padding:22px;}
.drawer .btn{width:100%;justify-content:center;}
.offcanvas-backdrop.show{opacity:.6;}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .28s var(--ease),transform .28s var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}
@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;}
  .fade-up{opacity:1;transform:none;animation:none;}
}

/* ============ 断点 ============ */
@media (max-width:1199.98px){
  .main-shell{margin-left:88px;}
  .app-sidebar{width:88px;transition:width .22s var(--ease);}
  .app-sidebar:hover{width:240px;box-shadow:0 0 40px rgba(0,0,0,.35);}
  .app-sidebar .brand{padding:26px 22px 22px;}
  .app-sidebar .brand .brand-main,.app-sidebar .brand .brand-sub{opacity:0;transition:opacity .18s var(--ease);}
  .app-sidebar:hover .brand .brand-main,.app-sidebar:hover .brand .brand-sub{opacity:1;}
  .app-sidebar .side-link{padding:0 26px;}
  .app-sidebar .side-link .label{opacity:0;transition:opacity .18s var(--ease);}
  .app-sidebar:hover .side-link .label{opacity:1;}
  .app-sidebar .side-foot{padding:18px 16px 0;}
  .app-sidebar .side-foot .btn{padding:14px 0;font-size:13px;}
  .app-sidebar .side-foot .note{opacity:0;transition:opacity .18s var(--ease);}
  .app-sidebar:hover .side-foot .note{opacity:1;}
  .hero{min-height:70vh;}
}
@media (max-width:991.98px){
  .main-shell{margin-left:0;padding-top:56px;}
  .app-sidebar{display:none;}
  .section{padding:72px 0;}
  .step-grid{grid-template-columns:1fr;gap:18px;}
  .cat-grid{grid-template-columns:repeat(2,1fr);}
  .cat-card,.cat-card:nth-child(1),.cat-card:nth-child(2){grid-column:span 1;}
  .cat-card:nth-child(5){grid-column:span 2;}
  .news-list{grid-template-columns:1fr;}
  .hero{min-height:auto;padding:72px 0 64px;}
  .hero-figure{aspect-ratio:16/10;margin-top:8px;}
  .hero h1{max-width:100%;}
}
@media (max-width:575.98px){
  body{font-size:16px;}
  .section{padding:56px 0;}
  .hero{padding:56px 0 52px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;min-height:46px;}
  .cat-grid{grid-template-columns:1fr;}
  .cat-card,.cat-card:nth-child(5){grid-column:span 1;}
  .apply-form{padding:22px 18px;}
  .faq-q{font-size:16.5px;}
  .news-item{padding:20px;}
  .site-footer{padding:56px 0 24px;}
  .footer-bottom{flex-direction:column;gap:10px;}
}

/* roulang page: article */
:root{
    --ink:#14120F;
    --ember:#C05A2B;
    --ember-deep:#A64A22;
    --pine:#3F5B54;
    --paper:#F7F4EF;
    --sand:#EDE7DE;
    --line:#DAD3C8;
    --body:#4A453E;
    --muted:#8A837A;
    --on-dark:#F7F4EF;
    --focus:rgba(192,90,43,.35);
    --font-sans:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
    --font-mono:"IBM Plex Mono","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
    --radius-btn:6px;
    --radius-card:10px;
    --sidebar-w:240px;
    --bs-primary:#C05A2B;
    --bs-primary-rgb:192,90,43;
    --bs-body-bg:#F7F4EF;
    --bs-body-color:#4A453E;
    --bs-border-color:#DAD3C8;
    --bs-link-color:#14120F;
    --bs-link-hover-color:#C05A2B;
    --bs-font-sans-serif:var(--font-sans);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.85;
    color:var(--body);
    background:var(--paper);
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{max-width:100%;height:auto;display:block}
  a{color:var(--ink);text-decoration:none;transition:color .18s ease,border-color .18s ease}
  a:hover{color:var(--ember)}
  h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-.01em}
  p{margin:0 0 1.1em}
  ul,ol{padding-left:1.4em}
  button{font-family:inherit}
  :focus-visible{outline:3px solid var(--focus);outline-offset:2px}
  .container{width:100%;max-width:1200px !important;margin-left:auto;margin-right:auto;padding-left:24px;padding-right:24px}
  @media (min-width:1200px){
    .container{padding-left:48px;padding-right:48px}
  }

  /* ============ 左侧 App Shell 导航 ============ */
  .mobile-topbar{
    display:none;position:fixed;top:0;left:0;right:0;height:56px;
    background:var(--ink);color:var(--on-dark);z-index:1030;
    align-items:center;justify-content:space-between;padding:0 16px;
  }
  .mobile-topbar .top-brand{font-size:16px;font-weight:800;color:var(--on-dark);letter-spacing:-.01em}
  .mobile-topbar .top-brand em{font-style:normal;color:rgba(247,244,239,.6);font-weight:500;font-size:12px;margin-left:6px}
  .nav-toggle{
    width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
    background:transparent;border:1px solid rgba(247,244,239,.28);border-radius:6px;color:var(--on-dark);
    cursor:pointer;transition:border-color .18s ease,background-color .18s ease;
  }
  .nav-toggle:hover{border-color:rgba(247,244,239,.6);background:rgba(247,244,239,.08)}
  .nav-toggle span{display:block;width:16px;height:2px;background:currentColor;position:relative}
  .nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:currentColor}
  .nav-toggle span::before{top:-5px}
  .nav-toggle span::after{top:5px}

  .nav-scrim{
    display:none;position:fixed;inset:0;background:rgba(20,18,15,.52);z-index:1045;
  }
  body.nav-open .nav-scrim{display:block}

  .app-sidebar{
    position:fixed;top:0;left:0;width:var(--sidebar-w);height:100vh;
    background:var(--ink);color:var(--on-dark);
    display:flex;flex-direction:column;
    padding:26px 0 20px;z-index:1050;overflow-y:auto;
    transition:width .22s cubic-bezier(.2,.7,.3,1);
  }
  .side-brand{display:block;padding:0 20px 26px;text-decoration:none}
  .side-brand .brand-main{
    font-size:22px;font-weight:800;line-height:1.2;color:var(--on-dark);letter-spacing:-.02em;
  }
  .side-brand .brand-main span{color:var(--ember)}
  .side-brand .brand-sub{
    margin-top:8px;font-size:11px;letter-spacing:.2em;color:rgba(247,244,239,.42);
    font-family:var(--font-mono);text-transform:uppercase;
  }
  .side-nav{display:flex;flex-direction:column;gap:2px}
  .side-link{
    position:relative;display:flex;align-items:center;gap:10px;
    height:44px;padding-left:20px;font-size:15px;
    color:rgba(247,244,239,.7);text-decoration:none;
    transition:color .18s ease,background-color .18s ease;
  }
  .side-link .dot{
    width:5px;height:5px;border-radius:50%;background:rgba(247,244,239,.26);flex:0 0 auto;
    transition:background-color .18s ease;
  }
  .side-link:hover{color:var(--on-dark);background:rgba(247,244,239,.06)}
  .side-link:hover .dot{background:rgba(247,244,239,.6)}
  .side-link.active{color:#fff;font-weight:600;background:rgba(247,244,239,.07)}
  .side-link.active::before{
    content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;background:var(--ember);
  }
  .side-link.active .dot{background:var(--ember)}
  .side-foot{margin-top:auto;padding:24px 20px 0}
  .side-foot .btn{width:100%;margin-bottom:14px}
  .side-foot p{
    margin:0;font-size:12px;line-height:1.7;color:rgba(247,244,239,.45);
  }

  @media (min-width:992px) and (max-width:1199px){
    :root{--sidebar-w:88px}
    .app-sidebar{width:88px;overflow:hidden}
    .app-sidebar:hover,.app-sidebar:focus-within{width:240px}
    .side-brand{padding:0 16px 24px;white-space:nowrap}
    .side-brand .brand-main{font-size:16px}
    .side-brand .brand-sub{opacity:0;transition:opacity .18s ease}
    .side-link{padding-left:18px;white-space:nowrap}
    .side-link .label{opacity:0;transition:opacity .18s ease}
    .app-sidebar:hover .side-link .label,
    .app-sidebar:focus-within .side-link .label,
    .app-sidebar:hover .side-brand .brand-sub,
    .app-sidebar:focus-within .side-brand .brand-sub{opacity:1}
    .side-foot{padding:24px 14px 0;white-space:nowrap}
    .side-foot p{opacity:0;transition:opacity .18s ease}
    .app-sidebar:hover .side-foot p,.app-sidebar:focus-within .side-foot p{opacity:1}
  }
  @media (max-width:991px){
    .mobile-topbar{display:flex}
    .app-sidebar{
      width:264px;transform:translateX(-100%);
      transition:transform .24s cubic-bezier(.2,.7,.3,1);
    }
    body.nav-open .app-sidebar{transform:translateX(0)}
  }

  /* ============ 主内容框架 ============ */
  .app-main{
    margin-left:var(--sidebar-w);min-height:100vh;
    display:flex;flex-direction:column;
  }
  .page-main{flex:1 0 auto;padding:34px 0 0}
  @media (max-width:991px){
    .app-main{margin-left:0;padding-top:56px}
  }

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:14px 26px;border-radius:var(--radius-btn);
    font-size:15px;font-weight:600;line-height:1.2;
    border:1.5px solid transparent;background:transparent;color:var(--ink);
    text-decoration:none;cursor:pointer;
    transition:transform .18s cubic-bezier(.2,.7,.3,1),background-color .18s ease,color .18s ease,border-color .18s ease;
  }
  .btn .arrow{display:inline-block;transition:transform .18s cubic-bezier(.2,.7,.3,1)}
  .btn:hover .arrow{transform:translateX(3px)}
  .btn-ember{background:var(--ember);border-color:var(--ember);color:var(--on-dark)}
  .btn-ember:hover{background:var(--ember-deep);border-color:var(--ember-deep);color:#fff;transform:translateY(-1px)}
  .btn-ember:active{transform:translateY(0)}
  .btn-ember:focus-visible{outline:none;box-shadow:0 0 0 3px var(--focus)}
  .btn-line{background:transparent;border-color:var(--ink);color:var(--ink)}
  .btn-line:hover{background:var(--ink);color:var(--on-dark);transform:translateY(-1px)}
  .btn-line:active{transform:translateY(0)}
  .btn-line:focus-visible{outline:none;box-shadow:0 0 0 3px var(--focus)}
  .btn-line-light{background:transparent;border-color:rgba(247,244,239,.5);color:var(--on-dark)}
  .btn-line-light:hover{background:var(--on-dark);border-color:var(--on-dark);color:var(--ink);transform:translateY(-1px)}
  .btn-line-light:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(247,244,239,.35)}
  .btn-block{width:100%}

  /* ============ 面包屑 ============ */
  .crumb{
    display:flex;align-items:center;flex-wrap:wrap;gap:8px;
    font-size:13px;color:var(--muted);line-height:1.6;margin-bottom:22px;
  }
  .crumb a{color:var(--muted)}
  .crumb a:hover{color:var(--ember)}
  .crumb .sep{color:#C4BCB0}
  .crumb .crumb-cat{color:var(--body)}
  .crumb .current{
    color:var(--ink);max-width:min(520px,72vw);overflow:hidden;
    text-overflow:ellipsis;white-space:nowrap;display:inline-block;
  }

  /* ============ 文章头部 ============ */
  .article-head{margin-bottom:8px}
  .meta-row{display:flex;align-items:center;flex-wrap:wrap;gap:14px;margin-bottom:18px}
  .meta-badge{
    display:inline-flex;align-items:center;gap:7px;
    background:var(--sand);color:var(--ink);
    font-size:12px;font-weight:600;line-height:1;
    padding:8px 13px;border-radius:999px;
  }
  .meta-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--ember)}
  .meta-item{
    font-size:13px;color:var(--muted);font-family:var(--font-mono);
    font-variant-numeric:tabular-nums;letter-spacing:.01em;
  }
  .article-head h1{
    font-size:clamp(28px,3.6vw,44px);font-weight:800;line-height:1.24;
    letter-spacing:-.02em;margin-bottom:18px;
  }
  .article-lede{
    font-size:16px;line-height:1.85;color:var(--body);
    max-width:760px;margin-bottom:26px;
  }
  .rule{height:1px;border:0;background:var(--line);margin:0 0 40px;opacity:1}

  /* ============ 正文布局 ============ */
  .article-shell{display:grid;grid-template-columns:minmax(0,1fr);gap:48px;padding-bottom:8px}
  @media (min-width:1200px){
    .article-shell{grid-template-columns:minmax(0,760px) 280px;gap:56px}
  }
  .article-main{min-width:0}

  .article-body{font-size:17px;line-height:1.9;color:var(--body)}
  .article-body > *:first-child{margin-top:0}
  .article-body p{margin:0 0 1.2em}
  .article-body h2{
    font-size:clamp(22px,2.2vw,28px);font-weight:700;line-height:1.36;
    color:var(--ink);margin:40px 0 16px;scroll-margin-top:96px;
  }
  .article-body h3{
    font-size:20px;font-weight:600;line-height:1.4;color:var(--ink);
    margin:28px 0 12px;scroll-margin-top:96px;
  }
  .article-body h4{font-size:17px;font-weight:600;color:var(--ink);margin:22px 0 10px}
  .article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.4em}
  .article-body li{margin-bottom:.5em}
  .article-body ul li::marker{color:var(--ember)}
  .article-body ol li::marker{color:var(--ember);font-variant-numeric:tabular-nums}
  .article-body blockquote{
    margin:24px 0;padding:18px 22px;background:var(--sand);
    border-left:3px solid var(--ember);border-radius:0 8px 8px 0;color:var(--ink);
  }
  .article-body blockquote p:last-child{margin-bottom:0}
  .article-body img{border-radius:10px;margin:24px 0;width:100%}
  .article-body figure{margin:24px 0}
  .article-body figcaption{
    font-size:12px;color:var(--muted);line-height:1.7;margin-top:8px;text-align:center;
  }
  .article-body a{color:var(--ember);border-bottom:1px solid rgba(192,90,43,.35)}
  .article-body a:hover{color:var(--ember-deep);border-bottom-color:var(--ember-deep)}
  .article-body code{
    font-family:var(--font-mono);font-size:.9em;background:var(--sand);
    color:var(--ink);padding:2px 6px;border-radius:4px;
  }
  .article-body pre{
    background:var(--ink);color:var(--on-dark);padding:18px 20px;border-radius:10px;
    overflow:auto;font-family:var(--font-mono);font-size:14px;line-height:1.7;margin:24px 0;
  }
  .article-body pre code{background:none;color:inherit;padding:0}
  .article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
  .article-body th,.article-body td{border-bottom:1px solid var(--line);padding:12px 14px;text-align:left}
  .article-body th{background:var(--sand);color:var(--ink);font-weight:600}
  .article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0;opacity:1}

  .empty-state{
    border:1px solid var(--line);border-radius:var(--radius-card);
    background:var(--sand);padding:36px 28px;
  }
  .empty-state h2{font-size:22px;margin-bottom:12px}
  .empty-state p{color:var(--body);max-width:520px}
  .empty-state .btn{margin-top:8px}

  .article-actions{
    display:flex;flex-wrap:wrap;gap:12px;
    margin-top:44px;padding-top:28px;border-top:1px solid var(--line);
  }
  @media (max-width:520px){
    .article-actions .btn{width:100%}
  }

  /* ============ 侧栏 ============ */
  .article-aside{display:none}
  @media (min-width:1200px){.article-aside{display:block}}
  .aside-inner{position:sticky;top:88px}
  .aside-block{margin-bottom:34px}
  .aside-title{
    font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--muted);
    margin-bottom:14px;text-transform:uppercase;
  }
  .toc{display:flex;flex-direction:column;border-left:1px solid var(--line)}
  .toc a{
    display:block;position:relative;font-size:14px;line-height:1.55;
    color:var(--muted);padding:7px 0 7px 14px;border-left:2px solid transparent;
    margin-left:-1px;transition:color .18s ease,border-color .18s ease;
  }
  .toc a.lv3{padding-left:26px;font-size:13px}
  .toc a:hover{color:var(--ink)}
  .toc a.is-active{color:var(--ember);border-left-color:var(--ember);font-weight:600}
  .rel-list{list-style:none;margin:0;padding:0}
  .rel-list li{border-bottom:1px solid var(--line);padding:12px 0}
  .rel-list li:first-child{padding-top:0}
  .rel-list li:last-child{border-bottom:0}
  .rel-list a{display:block;font-size:14px;line-height:1.6;color:var(--ink);font-weight:500}
  .rel-list a:hover{color:var(--ember)}
  .rel-list .rel-date{
    display:block;margin-top:5px;font-size:12px;color:var(--muted);
    font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  }
  .aside-cta{
    border:1px solid var(--line);border-radius:var(--radius-card);
    background:var(--sand);padding:22px 20px;
  }
  .aside-cta p{font-size:14px;color:var(--body);margin-bottom:14px}

  /* ============ 文末相关推荐（窄屏） ============ */
  .related-mobile{margin-top:44px;border-top:1px solid var(--line);padding-top:28px}
  @media (min-width:1200px){.related-mobile{display:none}}
  .related-mobile h2{font-size:20px;margin-bottom:16px}
  .related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
  .related-card{
    display:block;border:1px solid var(--line);border-radius:var(--radius-card);
    background:#fff;padding:20px 20px 18px;
    transition:transform .18s cubic-bezier(.2,.7,.3,1),border-color .18s ease,box-shadow .18s ease;
  }
  .related-card:hover{transform:translateY(-2px);border-color:rgba(20,18,15,.2);box-shadow:0 12px 32px rgba(20,18,15,.08)}
  .related-card h3{font-size:16px;font-weight:600;line-height:1.5;margin-bottom:8px}
  .related-card:hover h3{color:var(--ember)}
  .related-card span{font-size:12px;color:var(--muted);font-family:var(--font-mono)}

  /* ============ CTA 带 ============ */
  .cta-band{background:var(--ink);color:var(--on-dark);padding:64px 0;margin-top:72px}
  .cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:32px}
  .cta-inner h2{
    color:var(--on-dark);font-size:clamp(24px,2.6vw,32px);font-weight:700;line-height:1.3;margin-bottom:12px;
  }
  .cta-inner p{color:rgba(247,244,239,.68);font-size:15px;margin:0;max-width:520px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px}
  @media (max-width:520px){
    .cta-band{padding:48px 0;margin-top:56px}
    .cta-actions{width:100%}
    .cta-actions .btn{width:100%}
  }

  /* ============ 页脚 ============ */
  .site-footer{background:var(--ink);color:rgba(247,244,239,.72);padding:64px 0 28px;margin-top:0}
  .footer-brand .brand-main{font-size:22px;font-weight:800;color:var(--on-dark);letter-spacing:-.02em}
  .footer-brand .brand-sub{
    font-size:11px;letter-spacing:.2em;color:rgba(247,244,239,.42);
    margin:8px 0 16px;font-family:var(--font-mono);
  }
  .footer-brand p{font-size:14px;line-height:1.85;margin:0;max-width:330px;color:rgba(247,244,239,.6)}
  .footer-col h4{font-size:13px;font-weight:600;color:rgba(247,244,239,.72);margin:0 0 16px;letter-spacing:.02em}
  .footer-col ul{list-style:none;margin:0;padding:0}
  .footer-col li{margin-bottom:10px;font-size:14px;line-height:1.7;color:rgba(247,244,239,.62)}
  .footer-col a{color:rgba(247,244,239,.72);text-decoration:none}
  .footer-col a:hover{color:var(--ember)}
  .footer-bottom{
    display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;
    border-top:1px solid rgba(247,244,239,.14);margin-top:48px;padding-top:20px;
    font-size:13px;color:rgba(247,244,239,.5);
  }
  .footer-bottom .links a{color:rgba(247,244,239,.6);margin-left:18px}
  .footer-bottom .links a:first-child{margin-left:0}
  .footer-bottom .links a:hover{color:var(--ember)}
  @media (max-width:520px){
    .site-footer{padding:48px 0 24px}
    .footer-bottom .links a{margin-left:0;margin-right:16px}
  }

  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto}
    *,*::before,*::after{
      animation-duration:.001ms !important;
      transition-duration:.001ms !important;
      transform:none !important;
    }
  }

/* roulang page: category1 */
:root{
    --ink:#14120F;
    --ember:#C05A2B;
    --ember-deep:#A64A22;
    --pine:#3F5B54;
    --paper:#F7F4EF;
    --sand:#EDE7DE;
    --line:#DAD3C8;
    --body:#4A453E;
    --muted:#8A837A;
    --on-dark:#F7F4EF;
    --focus:rgba(192,90,43,.35);
    --sidebar-w:240px;
    --bs-primary:#C05A2B;
    --bs-primary-rgb:192,90,43;
    --bs-body-color:#4A453E;
    --bs-body-bg:#F7F4EF;
    --bs-border-color:#DAD3C8;
    --bs-link-color:#14120F;
    --bs-link-hover-color:#C05A2B;
    --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--paper);
    color:var(--body);
    font-family:var(--bs-font-sans-serif);
    font-size:16.5px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:var(--ink);text-decoration:none;transition:color .18s ease;}
  a:hover{color:var(--ember);}
  h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:700;letter-spacing:-0.01em;}
  p{margin:0 0 16px;}
  p:last-child{margin-bottom:0;}
  ::selection{background:rgba(192,90,43,.18);}
  :focus-visible{outline:3px solid var(--focus);outline-offset:2px;}
  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}

  /* ---------- 侧边导航 ---------- */
  .app-sidebar{
    position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
    background:var(--ink);color:var(--on-dark);
    display:flex;flex-direction:column;
    padding:30px 0 24px;z-index:1040;overflow-y:auto;
  }
  .sidebar-brand{padding:0 24px 28px;}
  .brand{
    display:inline-block;color:var(--on-dark);
    font-size:20px;font-weight:800;line-height:1.25;letter-spacing:-0.01em;
  }
  .brand span{color:rgba(247,244,239,.6);font-weight:600;}
  .brand:hover{color:var(--on-dark);}
  .brand:hover span{color:var(--ember);}
  .brand-sub{
    margin-top:10px;font-family:"IBM Plex Mono",ui-monospace,monospace;
    font-size:10.5px;letter-spacing:.24em;color:rgba(247,244,239,.38);
  }
  .side-nav{display:flex;flex-direction:column;gap:2px;padding:0 12px;}
  .side-link{
    position:relative;display:flex;align-items:center;gap:10px;
    min-height:44px;padding:0 12px 0 18px;border-radius:6px;
    color:rgba(247,244,239,.72);font-size:14.5px;line-height:1.4;
    transition:background .18s ease,color .18s ease;
  }
  .side-link .dot{
    width:5px;height:5px;border-radius:50%;flex:0 0 5px;
    background:rgba(247,244,239,.28);transition:background .18s ease;
  }
  .side-link:hover{background:rgba(247,244,239,.07);color:var(--on-dark);}
  .side-link:hover .dot{background:var(--ember);}
  .side-link.active{background:rgba(247,244,239,.07);color:var(--on-dark);font-weight:600;}
  .side-link.active .dot{background:var(--ember);}
  .side-link.active::before{
    content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
    border-radius:2px;background:var(--ember);
  }
  .sidebar-foot{margin-top:auto;padding:26px 24px 0;border-top:1px solid rgba(247,244,239,.12);}
  .sidebar-foot .btn{width:100%;justify-content:center;font-size:14px;padding:12px 16px;}
  .side-note{
    margin:14px 0 0;font-size:12px;line-height:1.7;
    color:rgba(247,244,239,.42);font-family:"IBM Plex Mono",ui-monospace,monospace;
  }

  /* ---------- 顶部条（移动端） ---------- */
  .topbar{
    display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:1035;
    background:var(--ink);color:var(--on-dark);
    align-items:center;justify-content:space-between;padding:0 18px;
  }
  .topbar .brand{font-size:17px;}
  .nav-toggle{
    width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;
    background:transparent;border:1px solid rgba(247,244,239,.28);border-radius:6px;
    color:var(--on-dark);font-size:16px;cursor:pointer;transition:border-color .18s,background .18s;
  }
  .nav-toggle:hover{border-color:var(--ember);background:rgba(192,90,43,.16);}
  .nav-scrim{
    position:fixed;inset:0;background:rgba(20,18,15,.48);z-index:1039;
    opacity:0;pointer-events:none;transition:opacity .26s ease;
  }
  .nav-scrim.is-open{opacity:1;pointer-events:auto;}

  /* ---------- 主内容 ---------- */
  .app-main{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column;}
  main{flex:1 0 auto;}

  /* ---------- Hero ---------- */
  .page-hero{
    position:relative;overflow:hidden;min-height:40vh;
    display:flex;align-items:flex-end;color:var(--on-dark);
    background-image:url("/assets/images/backpic/back-2.webp");
    background-position:center 32%;
    background-size:cover;
    background-repeat:no-repeat;
  }
  .page-hero::before{content:"";position:absolute;inset:0;background:rgba(20,18,15,.68);}
  .page-hero .container{position:relative;z-index:2;padding-top:72px;padding-bottom:48px;}
  .eyebrow{
    display:inline-block;font-family:"IBM Plex Mono",ui-monospace,monospace;
    font-size:11.5px;letter-spacing:.2em;text-transform:uppercase;
    color:var(--ember);margin-bottom:16px;
  }
  .page-hero h1{
    color:var(--on-dark);
    font-size:clamp(28px,4vw,46px);
    font-weight:800;line-height:1.18;letter-spacing:-0.02em;
    max-width:16em;
  }
  .hero-sub{
    margin:18px 0 0;font-size:clamp(14.5px,1.5vw,17px);
    color:rgba(247,244,239,.76);max-width:36em;
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}

  /* ---------- 面包屑 ---------- */
  .breadcrumb-bar{background:var(--paper);border-bottom:1px solid var(--line);}
  .crumbs{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    padding:16px 0;font-size:13px;color:var(--muted);
  }
  .crumbs a{color:var(--muted);}
  .crumbs a:hover{color:var(--ember);}
  .crumbs .sep{color:#C6BEB1;}
  .crumbs .current{color:var(--ink);font-weight:600;}

  /* ---------- 引导段 ---------- */
  .intro-band{padding:56px 0 8px;}
  .intro-text{
    font-size:clamp(15.5px,1.6vw,17.5px);line-height:1.95;
    color:var(--body);max-width:62em;
    padding-left:22px;border-left:3px solid var(--ember);
  }

  /* ---------- 通用板块 ---------- */
  .section{padding:96px 0;}
  .section-tight{padding:72px 0;}
  .section-sand{background:var(--sand);}
  .section-head{max-width:46em;margin-bottom:48px;}
  .section-head h2{font-size:clamp(26px,3vw,38px);line-height:1.25;}
  .section-head p{margin-top:16px;color:var(--muted);font-size:15.5px;}

  /* ---------- Z 字型图文 ---------- */
  .zig-row{
    display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
    padding:52px 0;
  }
  .zig-row + .zig-row{border-top:1px solid var(--line);}
  .zig-row.reverse .zig-media{order:2;}
  .zig-media{
    position:relative;border-radius:10px;overflow:hidden;border:1px solid var(--line);
    aspect-ratio:16/10;background:var(--sand);
  }
  .zig-media img{
    width:100%;height:100%;object-fit:cover;
    transition:transform .26s cubic-bezier(.2,.7,.3,1);
  }
  .zig-media:hover img{transform:scale(1.02);}
  .zig-body .step-tag{
    display:inline-flex;align-items:center;gap:8px;
    font-family:"IBM Plex Mono",ui-monospace,monospace;
    font-size:12px;letter-spacing:.14em;color:var(--ember);
    margin-bottom:14px;font-variant-numeric:tabular-nums;
  }
  .zig-body .step-tag::before{
    content:"";width:22px;height:1px;background:var(--ember);
  }
  .zig-body h2{font-size:clamp(23px,2.4vw,31px);line-height:1.3;margin-bottom:18px;}
  .zig-body p{font-size:16px;color:var(--body);line-height:1.9;}
  .rule{height:1px;background:var(--line);margin-top:26px;}
  .rule-accent{width:56px;height:3px;background:var(--ember);margin-top:26px;border-radius:2px;}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:10px;
    font-family:inherit;font-size:15px;font-weight:600;line-height:1;
    padding:14px 26px;border-radius:6px;border:1.5px solid transparent;
    text-decoration:none;cursor:pointer;min-height:44px;
    transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  }
  .btn i{font-size:13px;transition:transform .18s ease;}
  .btn:hover i{transform:translateX(3px);}
  .btn:active{transform:translateY(0);}
  .btn-primary{
    background:var(--ember);border-color:var(--ember);color:var(--on-dark);
  }
  .btn-primary:hover{
    background:var(--ember-deep);border-color:var(--ember-deep);color:var(--on-dark);
    transform:translateY(-1px);
  }
  .btn-outline-ink{
    background:transparent;border-color:var(--ink);color:var(--ink);
  }
  .btn-outline-ink:hover{background:var(--ink);color:var(--on-dark);transform:translateY(-1px);}
  .on-dark .btn-outline-ink{border-color:rgba(247,244,239,.55);color:var(--on-dark);}
  .on-dark .btn-outline-ink:hover{background:var(--on-dark);color:var(--ink);border-color:var(--on-dark);}

  /* ---------- FAQ ---------- */
  .faq-list{border-top:1px solid var(--line);}
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-item > summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
    gap:24px;padding:22px 4px;font-size:18px;font-weight:600;color:var(--ink);line-height:1.5;
    transition:color .18s ease;
  }
  .faq-item > summary::-webkit-details-marker{display:none;}
  .faq-item > summary::marker{content:"";}
  .faq-item > summary:hover{color:var(--ember);}
  .faq-sign{position:relative;width:16px;height:16px;flex:0 0 16px;}
  .faq-sign::before,.faq-sign::after{
    content:"";position:absolute;left:50%;top:50%;
    background:var(--ember);border-radius:1px;
    transform:translate(-50%,-50%);transition:transform .2s ease,opacity .2s ease;
  }
  .faq-sign::before{width:14px;height:2px;}
  .faq-sign::after{width:2px;height:14px;}
  .faq-item[open] .faq-sign::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
  .faq-body{padding:0 0 22px;}
  .faq-body p{
    margin:0;background:var(--sand);border-radius:8px;padding:20px 22px;
    font-size:15.5px;line-height:1.9;color:var(--body);
  }

  /* ---------- CTA 带 ---------- */
  .cta-band{background:var(--ink);color:var(--on-dark);padding:80px 0;}
  .cta-inner{display:flex;align-items:center;justify-content:space-between;gap:44px;flex-wrap:wrap;}
  .cta-text{max-width:34em;}
  .cta-text h2{color:var(--on-dark);font-size:clamp(26px,3vw,38px);line-height:1.25;}
  .cta-text p{margin-top:16px;color:rgba(247,244,239,.7);font-size:15.5px;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
  .cta-meta{
    margin-top:26px;display:flex;flex-wrap:wrap;gap:26px;
    font-size:12.5px;color:rgba(247,244,239,.45);
    font-family:"IBM Plex Mono",ui-monospace,monospace;letter-spacing:.04em;
  }
  .cta-meta span{display:inline-flex;align-items:center;gap:8px;}
  .cta-meta span::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--pine);}

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--ink);color:var(--on-dark);padding:72px 0 0;}
  .site-footer .container{max-width:1200px;padding:0 32px;}
  .footer-brand .brand-main{font-size:19px;font-weight:800;color:var(--on-dark);letter-spacing:-0.01em;}
  .footer-brand .brand-sub{
    margin:10px 0 18px;font-family:"IBM Plex Mono",ui-monospace,monospace;
    font-size:10.5px;letter-spacing:.24em;color:rgba(247,244,239,.4);
  }
  .footer-brand p{font-size:14px;line-height:1.85;color:rgba(247,244,239,.6);max-width:22em;}
  .footer-col h4{
    font-size:13px;font-weight:600;color:rgba(247,244,239,.74);
    margin:0 0 18px;letter-spacing:0;
  }
  .footer-col ul{list-style:none;margin:0;padding:0;}
  .footer-col li{margin-bottom:11px;font-size:14px;line-height:1.7;color:rgba(247,244,239,.56);}
  .footer-col a{color:rgba(247,244,239,.56);}
  .footer-col a:hover{color:var(--ember);}
  .footer-bottom{
    margin-top:56px;border-top:1px solid rgba(247,244,239,.14);
    padding:22px 0 26px;display:flex;justify-content:space-between;align-items:center;
    gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(247,244,239,.48);
  }
  .footer-bottom .links{display:flex;gap:22px;flex-wrap:wrap;}
  .footer-bottom a{color:rgba(247,244,239,.48);}
  .footer-bottom a:hover{color:var(--ember);}

  /* ---------- 响应式 ---------- */
  @media (max-width:1199.98px){
    .app-sidebar{
      transform:translateX(-100%);
      transition:transform .26s cubic-bezier(.2,.7,.3,1);
      box-shadow:0 12px 32px rgba(20,18,15,.28);
    }
    .app-sidebar.is-open{transform:translateX(0);}
    .app-main{margin-left:0;padding-top:60px;}
    .topbar{display:flex;}
    .page-hero{min-height:44vh;background-position:center 28%;}
  }
  @media (max-width:991.98px){
    .section{padding:72px 0;}
    .section-tight{padding:56px 0;}
    .zig-row{grid-template-columns:1fr;gap:28px;padding:44px 0;}
    .zig-row.reverse .zig-media{order:0;}
    .intro-band{padding:44px 0 4px;}
    .cta-band{padding:64px 0;}
    .cta-inner{gap:32px;}
    .site-footer{padding:56px 0 0;}
    .footer-bottom{margin-top:40px;}
  }
  @media (max-width:767.98px){
    .container{padding:0 20px;}
    .site-footer .container{padding:0 20px;}
    .page-hero .container{padding-top:56px;padding-bottom:40px;}
    .page-hero h1{max-width:none;}
    .hero-actions .btn{width:100%;}
    .section{padding:56px 0;}
    .section-head{margin-bottom:32px;}
    .zig-body h2{font-size:22px;}
    .faq-item > summary{font-size:16.5px;gap:16px;padding:18px 2px;}
    .cta-actions{width:100%;}
    .cta-actions .btn{width:100%;}
    .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px;}
  }
  @media (max-width:519.98px){
    .brand{font-size:18px;}
    .intro-text{padding-left:16px;font-size:15px;}
    .rule{margin-top:20px;}
  }
  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{
      animation-duration:.001ms !important;
      animation-iteration-count:1 !important;
      transition-duration:.001ms !important;
      scroll-behavior:auto !important;
    }
    .zig-media:hover img,.btn:hover{transform:none !important;}
  }

/* roulang page: category2 */
:root{
  --ink:#14120F;
  --ember:#C05A2B;
  --ember-deep:#A64A22;
  --pine:#3F5B54;
  --paper:#F7F4EF;
  --sand:#EDE7DE;
  --line:#DAD3C8;
  --body:#4A453E;
  --muted:#8A837A;
  --on-dark:#F7F4EF;
  --focus:rgba(192,90,43,.35);

  --radius:10px;
  --radius-sm:6px;
  --pad-section:96px;

  --bs-primary:#C05A2B;
  --bs-body-color:#4A453E;
  --bs-body-bg:#F7F4EF;
  --bs-border-color:#DAD3C8;
  --bs-link-color:#14120F;
  --bs-link-hover-color:#C05A2B;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --bs-body-font-family:var(--bs-font-sans-serif);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--body);
  font-family:var(--bs-font-sans-serif);
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
body.lock{overflow:hidden}
img{max-width:100%;display:block}
a{color:var(--ink);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--ember)}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}

.mono{font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;font-variant-numeric:tabular-nums}

/* ===================== App Shell ===================== */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:240px;
  background:var(--ink);
  color:var(--on-dark);
  display:flex;
  flex-direction:column;
  padding:28px 0 22px;
  z-index:1040;
  border-right:1px solid rgba(247,244,239,.08);
}
.sidebar .brand{
  display:block;
  padding:0 24px 26px;
  color:var(--on-dark);
  border-bottom:1px solid rgba(247,244,239,.1);
  margin-bottom:18px;
}
.sidebar .brand:hover{color:var(--on-dark)}
.brand-main{
  display:block;
  font-size:21px;
  font-weight:800;
  letter-spacing:.02em;
  line-height:1.25;
}
.brand-sub{
  display:block;
  margin-top:6px;
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:rgba(247,244,239,.55);
}
.side-nav{display:flex;flex-direction:column;flex:1}
.side-link{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:10px 20px;
  font-size:14.5px;
  color:rgba(247,244,239,.72);
  transition:color .18s ease,background .18s ease;
}
.side-link .dot{
  width:6px;height:6px;border-radius:50%;
  background:rgba(247,244,239,.3);
  flex:0 0 6px;
  transition:background .18s ease;
}
.side-link:hover,
.side-link:focus-visible{color:var(--on-dark);background:rgba(247,244,239,.05)}
.side-link:hover .dot{background:var(--ember)}
.side-link.active{
  color:var(--on-dark);
  font-weight:600;
  background:rgba(247,244,239,.06);
}
.side-link.active .dot{background:var(--ember)}
.side-link.active::before{
  content:"";
  position:absolute;left:0;top:8px;bottom:8px;
  width:3px;background:var(--ember);
  border-radius:0 3px 3px 0;
}
.side-foot{padding:20px 20px 0;border-top:1px solid rgba(247,244,239,.1);margin-top:18px}
.side-foot .btn{width:100%;justify-content:center}
.side-foot p{
  margin-top:12px;
  font-size:12px;
  line-height:1.7;
  color:rgba(247,244,239,.45);
}

/* 顶部移动条 */
.mobile-bar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:56px;
  background:var(--ink);
  color:var(--on-dark);
  align-items:center;
  justify-content:space-between;
  padding:0 18px;
  z-index:1050;
  border-bottom:1px solid rgba(247,244,239,.1);
}
.mobile-bar .brand{color:var(--on-dark);font-size:17px;font-weight:800;letter-spacing:.02em}
.mobile-bar .brand span{font-weight:500;color:rgba(247,244,239,.6);font-size:12px;margin-left:6px;letter-spacing:.14em}
.nav-toggle{
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  background:transparent;
  border:1px solid rgba(247,244,239,.25);
  border-radius:var(--radius-sm);
  cursor:pointer;
  padding:0;
}
.nav-toggle span{
  display:block;width:18px;height:2px;background:var(--on-dark);
  position:relative;
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--on-dark);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-backdrop{
  position:fixed;inset:0;background:rgba(20,18,15,.5);
  opacity:0;pointer-events:none;transition:opacity .22s ease;z-index:1035;
}
.nav-backdrop.show{opacity:1;pointer-events:auto}

/* 主内容区 */
.main-wrap{margin-left:240px;min-height:100vh}
.main-wrap .container{
  max-width:1200px;
  padding-left:32px;
  padding-right:32px;
  margin-left:auto;
  margin-right:auto;
}

/* ===================== 通用组件 ===================== */
.btn-x{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 26px;
  font-size:15px;font-weight:600;
  border-radius:var(--radius-sm);
  border:1.5px solid transparent;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-x .arrow{transition:transform .18s ease;font-size:14px;line-height:1}
.btn-x:hover .arrow{transform:translateX(3px)}
.btn-primary-x{background:var(--ember);color:var(--on-dark);border-color:var(--ember)}
.btn-primary-x:hover{background:var(--ember-deep);border-color:var(--ember-deep);color:var(--on-dark);transform:translateY(-1px)}
.btn-primary-x:active{transform:translateY(0)}
.btn-ghost-x{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost-x:hover{background:var(--ink);color:var(--on-dark);transform:translateY(-1px)}
.btn-ghost-x:active{transform:translateY(0)}
.on-dark .btn-ghost-x{color:var(--on-dark);border-color:rgba(247,244,239,.6)}
.on-dark .btn-ghost-x:hover{background:var(--on-dark);color:var(--ink);border-color:var(--on-dark)}

.eyebrow{
  display:inline-block;
  font-family:"IBM Plex Mono",ui-monospace,monospace;
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--ember);
  margin-bottom:16px;
}
.on-dark .eyebrow{color:var(--ember)}

.sec{padding:var(--pad-section) 0}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-head h2{
  font-size:clamp(26px,3vw,38px);
  font-weight:700;
  line-height:1.25;
  color:var(--ink);
  letter-spacing:-.01em;
}
.sec-head p{margin-top:16px;color:var(--body);font-size:16px}

.hairline{height:1px;background:var(--line);border:0;margin:0}

.badge-x{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 13px;
  font-size:12px;
  border-radius:999px;
  background:var(--sand);
  color:var(--ink);
  line-height:1.6;
}
.badge-x::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--ember);flex:0 0 6px}

/* ===================== Hero ===================== */
.hero{
  position:relative;
  overflow:hidden;
  background:var(--ink);
  color:var(--on-dark);
  min-height:40vh;
  display:flex;
  align-items:center;
  padding:76px 0 60px;
}
.hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center 32%;
}
.hero::after{
  content:"";
  position:absolute;inset:0;
  background:rgba(20,18,15,.72);
}
.hero-inner{position:relative;z-index:2;width:100%}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12.5px;
  color:rgba(247,244,239,.6);
  margin-bottom:26px;
}
.crumb a{color:rgba(247,244,239,.7)}
.crumb a:hover{color:var(--on-dark)}
.crumb .sep{color:rgba(247,244,239,.35)}
.crumb .cur{color:var(--on-dark)}
.hero h1{
  font-size:clamp(34px,5.2vw,62px);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.02em;
  color:var(--on-dark);
  max-width:16em;
}
.hero-sub{
  margin-top:20px;
  font-size:clamp(15px,1.4vw,19px);
  color:rgba(247,244,239,.88);
  max-width:34em;
}
.hero-desc{
  margin-top:18px;
  font-size:15px;
  line-height:1.9;
  color:rgba(247,244,239,.72);
  max-width:52em;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-meta{
  margin-top:22px;
  font-size:12.5px;
  color:rgba(247,244,239,.55);
  font-family:"IBM Plex Mono",ui-monospace,monospace;
  letter-spacing:.02em;
}

/* ===================== 时间轴 ===================== */
.tl-layout{display:grid;grid-template-columns:minmax(0,340px) minmax(0,1fr);gap:56px;align-items:start}
.tl-side{position:sticky;top:40px}
.tl-side h2{
  font-size:clamp(26px,2.6vw,34px);
  font-weight:700;line-height:1.25;color:var(--ink);
  letter-spacing:-.01em;
}
.tl-side p{margin-top:18px;font-size:15.5px;color:var(--body)}
.tl-figure{
  margin-top:28px;
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  aspect-ratio:16/10;
  background:var(--sand);
}
.tl-figure img{width:100%;height:100%;object-fit:cover;transition:transform .22s cubic-bezier(.2,.7,.3,1)}
.tl-figure:hover img{transform:scale(1.02)}
.tl-figcap{margin-top:10px;font-size:12.5px;color:var(--muted)}

.tl{position:relative;padding-left:52px}
.tl::before{
  content:"";position:absolute;left:14px;top:10px;bottom:14px;width:1px;background:var(--line);
}
.tl-item{position:relative;padding-bottom:36px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{
  position:absolute;left:-52px;top:2px;
  width:30px;height:30px;border-radius:50%;
  background:var(--paper);
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-family:"IBM Plex Mono",ui-monospace,monospace;
  font-size:11px;font-weight:600;color:var(--ember);
  z-index:2;
  transition:border-color .18s ease,transform .18s ease;
}
.tl-item:hover .tl-dot{border-color:var(--ember);transform:translateY(-1px)}
.tl-item h3{
  font-size:20px;font-weight:600;line-height:1.4;color:var(--ink);
  transition:color .18s ease;
}
.tl-item:hover h3{color:var(--ember)}
.tl-item p{margin-top:10px;font-size:15.5px;color:var(--body);max-width:46em}
.tl-item .tl-tag{
  display:inline-block;margin-top:14px;
  font-size:12px;color:var(--pine);
  border:1px solid rgba(63,91,84,.28);
  border-radius:999px;
  padding:3px 11px;
  line-height:1.7;
}

/* ===================== 权限范围卡片 ===================== */
.scope-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.scope-card{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:26px 26px 24px;
  transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.scope-card:hover{
  border-color:rgba(20,18,15,.22);
  transform:translateY(-2px);
  box-shadow:0 12px 32px rgba(20,18,15,.08);
}
.scope-card .k{
  font-family:"IBM Plex Mono",ui-monospace,monospace;
  font-size:12px;letter-spacing:.1em;color:var(--muted);
  display:block;margin-bottom:12px;
}
.scope-card h3{
  font-size:20px;font-weight:600;color:var(--ink);line-height:1.4;
  transition:color .18s ease;
}
.scope-card:hover h3{color:var(--ember)}
.scope-card ul{margin-top:16px}
.scope-card li{
  position:relative;
  padding-left:16px;
  font-size:15px;
  line-height:1.8;
  color:var(--body);
  border-top:1px solid var(--line);
  padding-top:10px;
  margin-top:10px;
}
.scope-card li:first-child{border-top:0;margin-top:0;padding-top:0}
.scope-card li::before{
  content:"";position:absolute;left:0;top:.85em;
  width:5px;height:5px;background:var(--ember);
}

/* ===================== 分配原则 ===================== */
.rule-band{
  background:var(--sand);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.rule-list{margin-top:8px;border-top:1px solid var(--line)}
.rule-item{
  display:grid;
  grid-template-columns:88px minmax(0,220px) minmax(0,1fr);
  gap:24px;
  align-items:baseline;
  padding:26px 0;
  border-bottom:1px solid var(--line);
}
.rule-item .idx{
  font-family:"IBM Plex Mono",ui-monospace,monospace;
  font-size:26px;
  font-weight:600;
  color:var(--ember);
  letter-spacing:.02em;
}
.rule-item h3{font-size:19px;font-weight:600;color:var(--ink);line-height:1.5}
.rule-item p{font-size:15.5px;color:var(--body);line-height:1.8}

/* ===================== FAQ ===================== */
.acc{border-top:1px solid var(--line);margin-top:8px}
.acc .accordion-item{
  border:0;
  border-bottom:1px solid var(--line);
  background:transparent;
  border-radius:0;
}
.acc .accordion-header{margin:0}
.acc .accordion-button{
  background:transparent;
  border:0;
  box-shadow:none;
  padding:22px 44px 22px 0;
  font-size:18px;
  font-weight:600;
  color:var(--ink);
  line-height:1.55;
  border-radius:0;
  transition:color .18s ease;
}
.acc .accordion-button:not(.collapsed){color:var(--ember);background:transparent;box-shadow:none}
.acc .accordion-button:hover{color:var(--ember)}
.acc .accordion-button:focus{box-shadow:none;outline:3px solid var(--focus);outline-offset:-3px;border-radius:var(--radius-sm)}
.acc .accordion-button::after{
  content:"";
  width:14px;height:14px;
  background-image:linear-gradient(var(--ink),var(--ink)),linear-gradient(var(--ink),var(--ink));
  background-size:14px 2px,2px 14px;
  background-position:center,center;
  background-repeat:no-repeat;
  transition:transform .2s ease,background-image .2s ease;
  margin-left:auto;
}
.acc .accordion-button:not(.collapsed)::after{
  transform:rotate(45deg);
  background-image:linear-gradient(var(--ember),var(--ember)),linear-gradient(var(--ember),var(--ember));
}
.acc .accordion-body{
  background:var(--sand);
  border-radius:8px;
  padding:20px 22px;
  font-size:15.5px;
  line-height:1.85;
  color:var(--body);
  margin-bottom:18px;
}
.acc .accordion-body p+p{margin-top:12px}

/* ===================== CTA ===================== */
.cta-band{
  background:var(--ink);
  color:var(--on-dark);
  padding:var(--pad-section) 0;
}
.cta-inner{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,460px);gap:64px;align-items:start}
.cta-band h2{
  font-size:clamp(26px,3vw,38px);
  font-weight:700;line-height:1.25;color:var(--on-dark);
  letter-spacing:-.01em;
}
.cta-band .lead{
  margin-top:18px;
  font-size:15.5px;
  color:rgba(247,244,239,.72);
  line-height:1.9;
  max-width:32em;
}
.cta-points{margin-top:30px;border-top:1px solid rgba(247,244,239,.16)}
.cta-points li{
  display:flex;gap:12px;align-items:baseline;
  padding:14px 0;
  border-bottom:1px solid rgba(247,244,239,.16);
  font-size:14px;
  color:rgba(247,244,239,.78);
}
.cta-points li .pt{
  font-family:"IBM Plex Mono",ui-monospace,monospace;
  font-size:11.5px;color:var(--ember);letter-spacing:.08em;
  flex:0 0 auto;
}
.form-card{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px;
}
.form-card h3{
  font-size:20px;font-weight:700;color:var(--ink);line-height:1.4;
}
.form-card .hint{
  margin-top:8px;font-size:13px;color:var(--muted);
}
.form-card .field{margin-top:18px}
.form-card label{
  display:block;
  font-size:13.5px;
  font-weight:600;
  color:var(--ink);
  margin-bottom:8px;
}
.form-card .form-control,
.form-card .form-select{
  width:100%;
  height:46px;
  padding:0 14px;
  font-size:15px;
  color:var(--ink);
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  transition:border-color .18s ease,box-shadow .18s ease;
  box-shadow:none;
}
.form-card textarea.form-control{height:auto;min-height:96px;padding:12px 14px;line-height:1.7;resize:vertical}
.form-card .form-control:focus,
.form-card .form-select:focus{
  border-color:var(--ember);
  box-shadow:0 0 0 3px var(--focus);
  outline:none;
}
.form-card .btn-x{width:100%;justify-content:center;margin-top:22px}
.form-note{
  margin-top:14px;
  font-size:12.5px;
  color:var(--muted);
  line-height:1.75;
}
.form-msg{
  margin-top:14px;
  font-size:13.5px;
  color:var(--pine);
  display:none;
}
.form-msg.show{display:block}

/* ===================== 页脚 ===================== */
.site-footer{
  background:var(--ink);
  color:rgba(247,244,239,.7);
  padding:72px 0 28px;
  border-top:1px solid rgba(247,244,239,.1);
}
.site-footer .container{max-width:1200px;padding-left:32px;padding-right:32px}
.footer-brand .brand-main{font-size:20px;font-weight:800;color:var(--on-dark)}
.footer-brand .brand-sub{margin-top:8px;font-size:11px;letter-spacing:.22em;color:rgba(247,244,239,.45)}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(247,244,239,.62);max-width:30em}
.footer-col h4{
  font-size:13px;
  font-weight:600;
  color:rgba(247,244,239,.7);
  letter-spacing:.04em;
  margin-bottom:16px;
}
.footer-col ul li{font-size:14px;line-height:1.9;color:rgba(247,244,239,.62);margin-bottom:9px}
.footer-col ul li a{color:rgba(247,244,239,.62)}
.footer-col ul li a:hover{color:var(--ember)}
.footer-bottom{
  margin-top:56px;
  padding-top:22px;
  border-top:1px solid rgba(247,244,239,.16);
  display:flex;flex-wrap:wrap;gap:12px;
  justify-content:space-between;
  font-size:12.5px;
  color:rgba(247,244,239,.5);
}
.footer-bottom .links{display:flex;flex-wrap:wrap;gap:20px}
.footer-bottom .links a{color:rgba(247,244,239,.55)}
.footer-bottom .links a:hover{color:var(--ember)}

/* ===================== 响应式 ===================== */
@media (max-width:1199px){
  .main-wrap{margin-left:88px}
  .sidebar{width:88px;padding:24px 0 18px}
  .sidebar .brand{padding:0 0 20px;text-align:center;margin-bottom:14px}
  .sidebar .brand-main{font-size:15px}
  .sidebar .brand-sub{font-size:9px;letter-spacing:.12em}
  .side-link{justify-content:center;padding:10px 0}
  .side-link .label{
    position:absolute;
    left:88px;
    top:50%;
    transform:translateY(-50%) translateX(-4px);
    background:var(--ink);
    color:var(--on-dark);
    padding:7px 14px;
    font-size:13px;
    white-space:nowrap;
    border-radius:var(--radius-sm);
    border:1px solid rgba(247,244,239,.16);
    opacity:0;
    pointer-events:none;
    transition:opacity .16s ease,transform .16s ease;
    z-index:1060;
  }
  .side-link:hover .label,
  .side-link:focus-visible .label{opacity:1;transform:translateY(-50%) translateX(0)}
  .side-foot{padding:16px 12px 0}
  .side-foot .btn{padding:12px 0;font-size:13px}
  .side-foot p{display:none}
  .main-wrap .container{padding-left:28px;padding-right:28px}
  .tl-layout{grid-template-columns:minmax(0,1fr);gap:40px}
  .tl-side{position:static}
  .tl-figure{max-width:520px}
  .cta-inner{grid-template-columns:minmax(0,1fr);gap:40px}
}

@media (max-width:991px){
  .rule-item{grid-template-columns:64px minmax(0,1fr);gap:6px 20px}
  .rule-item p{grid-column:2}
  .scope-grid{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:767px){
  :root{--pad-section:56px}
  .mobile-bar{display:flex}
  .main-wrap{margin-left:0;padding-top:56px}
  .sidebar{
    width:280px;
    padding:24px 0 20px;
    transform:translateX(-100%);
    transition:transform .24s cubic-bezier(.2,.7,.3,1);
    z-index:1045;
  }
  .sidebar.open{transform:translateX(0)}
  .sidebar .brand{padding:0 24px 22px;text-align:left}
  .sidebar .brand-main{font-size:20px}
  .sidebar .brand-sub{font-size:11px;letter-spacing:.2em}
  .side-link{justify-content:flex-start;padding:10px 22px}
  .side-link .label{position:static;transform:none;opacity:1;background:transparent;border:0;padding:0;font-size:15px}
  .side-foot{padding:18px 22px 0}
  .side-foot .btn{padding:14px 0;font-size:15px}
  .side-foot p{display:block}
  .main-wrap .container{padding-left:20px;padding-right:20px}
  .hero{padding:44px 0 42px;min-height:0}
  .hero-actions{gap:12px}
  .hero-actions .btn-x{width:100%;justify-content:center;min-height:46px}
  .tl{padding-left:44px}
  .tl::before{left:12px}
  .tl-dot{left:-44px;width:26px;height:26px;font-size:10px}
  .acc .accordion-button{font-size:16.5px;padding-right:34px}
  .cta-band{padding:var(--pad-section) 0}
  .form-card{padding:22px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .btn-x:hover,.scope-card:hover{transform:none}
  .tl-figure:hover img{transform:none}
}

/* roulang page: category3 */
:root{
  --ink:#14120F;
  --ember:#C05A2B;
  --ember-deep:#A64A22;
  --pine:#3F5B54;
  --paper:#F7F4EF;
  --sand:#EDE7DE;
  --line:#DAD3C8;
  --body:#4A453E;
  --muted:#8A837A;
  --on-dark:#F7F4EF;
  --focus:rgba(192,90,43,.35);
  --radius-btn:6px;
  --radius-card:10px;
  --font-sans:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --bs-primary:#C05A2B;
  --bs-body-color:#4A453E;
  --bs-body-bg:#F7F4EF;
  --bs-border-color:#DAD3C8;
  --bs-link-color:#14120F;
  --bs-link-hover-color:#C05A2B;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --bs-body-font-size:16.5px;
  --bs-body-line-height:1.85;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.85;
  color:var(--body);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--ember);}
button{font-family:inherit;}
h1,h2,h3,h4,h5,p{margin:0;}
ul,ol{padding:0;margin:0;list-style:none;}
.container,
.container-fluid{
  width:100%;
  max-width:1240px;
  margin-left:auto;
  margin-right:auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:992px){
  .container,.container-fluid{padding-left:32px;padding-right:32px;}
}
@media (min-width:1200px){
  .container{max-width:1240px;}
}
@media (min-width:1400px){
  .container{max-width:1240px;}
}

/* ============ 左侧 App Shell 导航 ============ */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:240px;
  background:var(--ink);
  color:var(--on-dark);
  z-index:1040;
  border-right:1px solid rgba(247,244,239,.08);
  overflow-y:auto;
}
.sidebar-inner{
  display:flex;
  flex-direction:column;
  min-height:100%;
  padding:24px 0 20px;
}
.brand{
  display:block;
  padding:0 20px 0;
  color:var(--on-dark);
  text-decoration:none;
}
.brand:hover{color:var(--on-dark);}
.brand-main{
  display:block;
  font-size:20px;
  font-weight:800;
  letter-spacing:.04em;
  line-height:1.3;
}
.brand-sub{
  display:block;
  margin-top:5px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.26em;
  color:rgba(247,244,239,.45);
}
.side-nav{
  display:flex;
  flex-direction:column;
  gap:2px;
  padding:30px 0 0;
}
.side-link{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  height:44px;
  padding:0 20px;
  font-size:14.5px;
  color:rgba(247,244,239,.7);
  text-decoration:none;
  transition:color .18s ease,background .18s ease;
}
.side-link .dot{
  width:6px;height:6px;
  border-radius:50%;
  background:rgba(247,244,239,.28);
  flex:none;
  transition:background .18s ease;
}
.side-link:hover{
  color:#fff;
  background:rgba(247,244,239,.05);
}
.side-link:hover .dot{background:var(--ember);}
.side-link.active{
  color:#fff;
  font-weight:600;
  background:rgba(247,244,239,.06);
}
.side-link.active::before{
  content:"";
  position:absolute;
  left:0;top:9px;bottom:9px;
  width:3px;
  background:var(--ember);
  border-radius:0 2px 2px 0;
}
.side-link.active .dot{background:var(--ember);}
.side-link:focus-visible{
  outline:2px solid var(--ember);
  outline-offset:-2px;
}
.sidebar-foot{
  margin-top:auto;
  padding:22px 20px 0;
  border-top:1px solid rgba(247,244,239,.1);
}
.sidebar-foot p{
  margin-top:12px;
  font-size:12px;
  line-height:1.7;
  color:rgba(247,244,239,.45);
}

/* ============ 主内容区 ============ */
.main-area{
  margin-left:240px;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
.page-main{flex:1 1 auto;}

/* ============ 顶部移动栏 ============ */
.topbar{
  display:none;
  position:fixed;
  top:0;left:0;right:0;
  height:56px;
  padding:0 16px;
  align-items:center;
  justify-content:space-between;
  background:var(--ink);
  color:var(--on-dark);
  z-index:1040;
  border-bottom:1px solid rgba(247,244,239,.1);
}
.topbar .brand{padding:0;}
.topbar .brand-main{font-size:16px;}
.topbar .brand-sub{font-size:8px;letter-spacing:.2em;margin-top:2px;}
.menu-btn{
  width:42px;height:42px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:4px;
  background:transparent;
  border:1px solid rgba(247,244,239,.28);
  border-radius:6px;
  cursor:pointer;
  transition:border-color .18s ease,background .18s ease;
}
.menu-btn span{
  display:block;
  width:16px;height:2px;
  background:var(--on-dark);
  transition:background .18s ease;
}
.menu-btn:hover{border-color:var(--ember);background:rgba(247,244,239,.06);}
.menu-btn:hover span{background:var(--ember);}
.menu-btn:focus-visible{outline:2px solid var(--ember);outline-offset:2px;}
.offcanvas.mobile-nav{
  background:var(--ink);
  color:var(--on-dark);
  width:288px;
  --bs-offcanvas-bg:var(--ink);
  --bs-offcanvas-color:var(--on-dark);
  --bs-offcanvas-border-color:rgba(247,244,239,.12);
}
.mobile-nav .offcanvas-body{padding:0 0 24px;}
.mobile-nav .brand{padding:0 20px 18px;}
.mobile-nav .side-link{height:48px;}

/* ============ 按钮 ============ */
.btn-ember,
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:14px 26px;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  border-radius:var(--radius-btn);
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-ember{
  background:var(--ember);
  border:1px solid var(--ember);
  color:#fff;
}
.btn-ember:hover{
  background:var(--ember-deep);
  border-color:var(--ember-deep);
  color:#fff;
  transform:translateY(-1px);
}
.btn-ember:active{transform:translateY(0);}
.btn-ember:focus-visible{outline:none;box-shadow:0 0 0 3px var(--focus);}
.btn-ghost{
  background:transparent;
  border:1.5px solid var(--ink);
  color:var(--ink);
}
.btn-ghost:hover{
  background:var(--ink);
  border-color:var(--ink);
  color:var(--on-dark);
  transform:translateY(-1px);
}
.btn-ghost:active{transform:translateY(0);}
.btn-ghost:focus-visible{outline:none;box-shadow:0 0 0 3px var(--focus);}
.arrow{
  display:inline-block;
  transition:transform .18s ease;
}
.btn-ember:hover .arrow,
.btn-ghost:hover .arrow{transform:translateX(3px);}
.btn-block{width:100%;}

/* ============ Hero ============ */
.hero{
  position:relative;
  min-height:340px;
  display:flex;
  align-items:center;
  padding:64px 0 56px;
  color:var(--on-dark);
  background-image:
    linear-gradient(180deg,rgba(20,18,15,.72),rgba(20,18,15,.80)),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover,cover;
  background-position:center center,center 32%;
  background-repeat:no-repeat,no-repeat;
}
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  color:rgba(247,244,239,.55);
  margin-bottom:26px;
}
.crumbs a{color:rgba(247,244,239,.72);}
.crumbs a:hover{color:var(--ember);}
.crumbs .sep{opacity:.45;}
.crumbs .cur{color:#fff;}
.hero h1{
  font-size:clamp(30px,4vw,50px);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.02em;
  max-width:20em;
  margin-bottom:16px;
}
.hero-sub{
  font-size:clamp(15px,1.6vw,18px);
  color:rgba(247,244,239,.82);
  margin-bottom:20px;
}
.hero-lead{
  max-width:760px;
  font-size:15px;
  line-height:1.9;
  color:rgba(247,244,239,.72);
  border-left:3px solid var(--ember);
  padding-left:16px;
  margin-bottom:30px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  align-items:center;
  margin-bottom:18px;
}
.hero .btn-ghost{
  border-color:rgba(247,244,239,.55);
  color:var(--on-dark);
}
.hero .btn-ghost:hover{
  background:var(--on-dark);
  border-color:var(--on-dark);
  color:var(--ink);
}
.hero-note{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(247,244,239,.5);
}

/* ============ 版块基础 ============ */
.section{padding:88px 0;}
.section-alt{background:var(--sand);}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--ember);
  margin-bottom:12px;
}
.section-head{max-width:760px;}
.section-head h2{
  font-size:clamp(24px,2.8vw,34px);
  font-weight:700;
  line-height:1.28;
  letter-spacing:-.01em;
  color:var(--ink);
  margin-bottom:14px;
}
.section-desc{
  font-size:15.5px;
  line-height:1.85;
  color:var(--body);
}
.rule{
  height:1px;
  background:var(--line);
  border:0;
  margin:0;
}

/* ============ 双列对照清单 ============ */
.compare{
  margin-top:44px;
  border-top:1px solid var(--line);
}
.compare-head{
  display:grid;
  grid-template-columns:280px 1fr;
  gap:32px;
  padding:14px 6px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
  border-bottom:1px solid var(--line);
}
.compare-row{
  display:grid;
  grid-template-columns:280px 1fr;
  gap:32px;
  padding:26px 6px;
  border-bottom:1px solid var(--line);
  transition:background .18s ease;
}
.compare-row:hover{background:rgba(237,231,222,.55);}
.compare-key{
  font-size:17px;
  font-weight:700;
  line-height:1.6;
  color:var(--ink);
  transition:color .18s ease;
}
.compare-row:hover .compare-key{color:var(--ember);}
.compare-val{
  font-size:15px;
  line-height:1.85;
  color:var(--body);
}
.compare-val em{
  font-style:normal;
  color:var(--pine);
  font-weight:600;
}

/* ============ 图文 + 指标 ============ */
.overview{
  display:grid;
  grid-template-columns:1.02fr .98fr;
  gap:56px;
  align-items:center;
  margin-top:44px;
}
.figure{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  background:var(--sand);
  aspect-ratio:16/10;
}
.figure img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .26s cubic-bezier(.2,.7,.3,1);
}
.figure:hover img{transform:scale(1.02);}
.figure-cap{
  margin-top:10px;
  font-size:12.5px;
  color:var(--muted);
}
.metrics{display:grid;gap:16px;}
.metric{
  display:flex;
  align-items:baseline;
  gap:20px;
  padding:20px 22px;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.metric:hover{
  transform:translateY(-2px);
  border-color:rgba(20,18,15,.28);
  box-shadow:0 12px 32px rgba(20,18,15,.08);
}
.metric .num{
  font-family:var(--font-mono);
  font-size:30px;
  font-weight:600;
  line-height:1;
  color:var(--ember);
  font-variant-numeric:tabular-nums;
  flex:none;
}
.metric .txt strong{
  display:block;
  font-size:15px;
  font-weight:700;
  color:var(--ink);
  line-height:1.6;
}
.metric .txt span{
  display:block;
  font-size:13.5px;
  color:var(--muted);
  line-height:1.7;
}

/* ============ 角色分工卡 ============ */
.role-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  margin-top:40px;
}
.role-card{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px;
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.role-card:hover{
  transform:translateY(-2px);
  border-color:rgba(20,18,15,.28);
  box-shadow:0 12px 32px rgba(20,18,15,.08);
}
.role-card .idx{
  display:block;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.16em;
  color:var(--pine);
  margin-bottom:12px;
}
.role-card h3{
  font-size:19px;
  font-weight:600;
  line-height:1.45;
  color:var(--ink);
  margin-bottom:10px;
  transition:color .18s ease;
}
.role-card:hover h3{color:var(--ember);}
.role-card p{
  font-size:14.5px;
  line-height:1.85;
  color:var(--body);
}

/* ============ FAQ ============ */
.faq{
  margin-top:36px;
  max-width:900px;
  border-top:1px solid var(--line);
}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  position:relative;
  width:100%;
  display:block;
  padding:22px 44px 22px 0;
  background:transparent;
  border:0;
  text-align:left;
  font-size:17px;
  font-weight:600;
  line-height:1.6;
  color:var(--ink);
  cursor:pointer;
  transition:color .18s ease;
}
.faq-q:hover{color:var(--ember);}
.faq-q:focus-visible{outline:2px solid var(--focus);outline-offset:4px;}
.faq-q::before,
.faq-q::after{
  content:"";
  position:absolute;
  right:10px;
  top:50%;
  background:var(--ember);
  transition:transform .22s ease,opacity .22s ease;
}
.faq-q::before{width:14px;height:2px;transform:translateY(-50%);}
.faq-q::after{width:2px;height:14px;transform:translateY(-50%);}
.faq-item.open .faq-q::after{opacity:0;transform:translateY(-50%) scaleY(.2);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .26s cubic-bezier(.2,.7,.3,1);
}
.faq-a-inner{
  padding:0 20px 22px;
  font-size:15px;
  line-height:1.85;
  color:var(--body);
}
.faq-item.open .faq-a{max-height:520px;}
.faq-item.open .faq-a-inner{
  background:var(--sand);
  border-radius:8px;
  padding:20px;
  margin-bottom:20px;
}

/* ============ CTA 带 ============ */
.cta-band{
  background:var(--ink);
  color:var(--on-dark);
  padding:84px 0;
}
.cta-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:start;
}
.cta-band h2{
  font-size:clamp(24px,2.8vw,34px);
  font-weight:700;
  line-height:1.3;
  letter-spacing:-.01em;
  margin-bottom:16px;
}
.cta-band .cta-desc{
  font-size:15.5px;
  line-height:1.9;
  color:rgba(247,244,239,.72);
  max-width:520px;
  margin-bottom:28px;
}
.cta-points{display:grid;gap:14px;max-width:480px;}
.cta-points li{
  display:flex;
  gap:12px;
  font-size:14.5px;
  line-height:1.8;
  color:rgba(247,244,239,.7);
}
.cta-points li::before{
  content:"";
  width:6px;height:6px;
  flex:none;
  margin-top:10px;
  border-radius:50%;
  background:var(--ember);
}
.form-card{
  background:rgba(247,244,239,.055);
  border:1px solid rgba(247,244,239,.16);
  border-radius:var(--radius-card);
  padding:28px;
}
.form-row{margin-bottom:18px;}
.form-label{
  display:block;
  margin-bottom:8px;
  font-size:13px;
  color:rgba(247,244,239,.72);
}
.form-control,
.form-select{
  width:100%;
  height:46px;
  padding:0 14px;
  background:rgba(247,244,239,.04);
  border:1px solid rgba(247,244,239,.22);
  border-radius:6px;
  color:var(--on-dark);
  font-size:15px;
  font-family:inherit;
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
textarea.form-control{height:auto;min-height:96px;padding:12px 14px;line-height:1.7;resize:vertical;}
.form-control::placeholder{color:rgba(247,244,239,.38);}
.form-control:focus,
.form-select:focus{
  outline:none;
  border-color:var(--ember);
  background:rgba(247,244,239,.07);
  box-shadow:0 0 0 3px var(--focus);
  color:var(--on-dark);
}
.form-select option{color:#14120F;background:#F7F4EF;}
.form-tip{
  margin-top:14px;
  font-size:12.5px;
  line-height:1.7;
  color:rgba(247,244,239,.45);
}
.form-error{
  display:none;
  margin-top:8px;
  font-size:12.5px;
  color:#E08D63;
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink);
  color:rgba(247,244,239,.66);
  padding:64px 0 26px;
}
.footer-brand .brand-main{
  display:block;
  font-size:19px;
  font-weight:800;
  letter-spacing:.04em;
  color:var(--on-dark);
}
.footer-brand .brand-sub{
  display:block;
  margin:8px 0 16px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  color:rgba(247,244,239,.42);
}
.footer-brand p{
  font-size:14px;
  line-height:1.85;
  color:rgba(247,244,239,.6);
  max-width:360px;
}
.footer-col h4{
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  color:rgba(247,244,239,.72);
  margin-bottom:16px;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col a,
.footer-col li{
  font-size:14px;
  line-height:1.7;
  color:rgba(247,244,239,.62);
  text-decoration:none;
  transition:color .18s ease;
}
.footer-col a:hover{color:var(--ember);}
.footer-bottom{
  margin-top:48px;
  padding-top:20px;
  border-top:1px solid rgba(247,244,239,.12);
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  justify-content:space-between;
  align-items:center;
  font-size:13px;
  color:rgba(247,244,239,.48);
}
.footer-bottom .links{display:flex;flex-wrap:wrap;gap:20px;}
.footer-bottom a{
  color:rgba(247,244,239,.58);
  transition:color .18s ease;
}
.footer-bottom a:hover{color:var(--ember);}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .sidebar{width:88px;}
  .sidebar-inner{padding:24px 0 18px;}
  .sidebar .brand{padding:0 8px;text-align:center;}
  .sidebar .brand-main{font-size:15px;letter-spacing:0;}
  .sidebar .brand-sub{font-size:8px;letter-spacing:.12em;}
  .side-link{justify-content:center;padding:0;height:46px;}
  .side-link .label{display:none;}
  .side-link .dot{width:8px;height:8px;}
  .sidebar-foot{padding:18px 10px 0;}
  .sidebar-foot .btn-ember{padding:10px 4px;font-size:12px;letter-spacing:.02em;}
  .sidebar-foot p{display:none;}
  .main-area{margin-left:88px;}
  .overview{grid-template-columns:1fr;gap:40px;}
  .cta-grid{grid-template-columns:1fr;gap:40px;}
}
@media (max-width:991.98px){
  .sidebar{display:none;}
  .topbar{display:flex;}
  .main-area{margin-left:0;padding-top:56px;}
  .section{padding:64px 0;}
  .hero{padding:52px 0 48px;min-height:0;}
  .role-grid{grid-template-columns:1fr;}
  .cta-band{padding:64px 0;}
}
@media (max-width:767.98px){
  .compare-head{display:none;}
  .compare-row{
    grid-template-columns:1fr;
    gap:10px;
    padding:22px 4px;
  }
  .compare-key{font-size:16px;}
  .faq-q{font-size:16px;padding-right:38px;}
}
@media (max-width:575.98px){
  body{font-size:16px;}
  .container,.container-fluid{padding-left:18px;padding-right:18px;}
  .section{padding:52px 0;}
  .hero-actions{gap:12px;}
  .hero-actions .btn-ember,
  .hero-actions .btn-ghost{width:100%;}
  .metric{flex-direction:row;gap:14px;padding:18px;}
  .metric .num{font-size:26px;}
  .form-card{padding:22px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transform:none !important;
  }
}

/* roulang page: category4 */
:root{
  --ink:#14120F;
  --ember:#C05A2B;
  --ember-deep:#A64A22;
  --pine:#3F5B54;
  --paper:#F7F4EF;
  --sand:#EDE7DE;
  --line:#DAD3C8;
  --body:#4A453E;
  --muted:#8A837A;
  --on-dark:#F7F4EF;
  --focus:rgba(192,90,43,.35);

  --bs-primary:#C05A2B;
  --bs-primary-rgb:192,90,43;
  --bs-body-color:#4A453E;
  --bs-body-bg:#F7F4EF;
  --bs-border-color:#DAD3C8;
  --bs-link-color:#14120F;
  --bs-link-hover-color:#C05A2B;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --bs-border-radius:6px;
  --bs-border-radius-lg:10px;
}

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

html{scroll-behavior:smooth;}

body{
  margin:0;
  font-family:var(--bs-font-sans-serif);
  background:var(--paper);
  color:var(--body);
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--ember);}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4,h5{color:var(--ink);margin:0;font-weight:700;letter-spacing:-0.01em;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}

.mono{font-family:"IBM Plex Mono","SFMono-Regular",Consolas,monospace;font-variant-numeric:tabular-nums;}

/* ============ 侧边导航 ============ */
.side-shell{
  position:fixed;
  top:0;left:0;bottom:0;
  width:240px;
  background:var(--ink);
  color:var(--on-dark);
  display:flex;
  flex-direction:column;
  padding:26px 0 22px;
  z-index:1040;
  border-right:1px solid rgba(247,244,239,.08);
}
.side-brand{
  padding:0 22px 22px;
  border-bottom:1px solid rgba(247,244,239,.12);
  display:block;
}
.side-brand .brand-main{
  font-size:20px;
  font-weight:800;
  color:var(--on-dark);
  letter-spacing:-0.02em;
  line-height:1.2;
}
.side-brand .brand-sub{
  font-family:"IBM Plex Mono",monospace;
  font-size:11px;
  letter-spacing:.18em;
  color:rgba(247,244,239,.5);
  margin-top:8px;
  text-transform:uppercase;
}
.side-nav{
  padding:18px 12px 0;
  display:flex;
  flex-direction:column;
  gap:4px;
  flex:1 1 auto;
  overflow-y:auto;
}
.side-link{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:0 12px;
  border-radius:6px;
  color:rgba(247,244,239,.76);
  font-size:14.5px;
  line-height:1.3;
  position:relative;
  transition:color .18s ease,background .18s ease;
}
.side-link .dot{
  width:5px;height:5px;border-radius:50%;
  background:rgba(247,244,239,.35);
  flex:0 0 auto;
  transition:background .18s ease,transform .18s ease;
}
.side-link:hover{color:var(--on-dark);background:rgba(247,244,239,.06);}
.side-link:hover .dot{background:var(--ember);}
.side-link.active{
  color:var(--on-dark);
  font-weight:600;
  background:rgba(192,90,43,.14);
}
.side-link.active::before{
  content:"";
  position:absolute;
  left:0;top:9px;bottom:9px;
  width:3px;
  border-radius:2px;
  background:var(--ember);
}
.side-link.active .dot{background:var(--ember);}
.side-link:focus-visible{outline:3px solid var(--focus);outline-offset:2px;}

.side-foot{
  padding:18px 20px 0;
  border-top:1px solid rgba(247,244,239,.12);
}
.side-foot .btn-ember{width:100%;justify-content:center;}
.side-foot .helper{
  margin-top:12px;
  font-size:12px;
  color:rgba(247,244,239,.5);
  line-height:1.6;
}

/* ============ 移动端顶栏 ============ */
.mobile-bar{
  display:none;
  position:fixed;
  top:0;left:0;right:0;
  height:56px;
  align-items:center;
  justify-content:space-between;
  padding:0 16px;
  background:var(--ink);
  color:var(--on-dark);
  z-index:1050;
  border-bottom:1px solid rgba(247,244,239,.1);
}
.mobile-bar .m-brand{
  font-size:16px;
  font-weight:800;
  color:var(--on-dark);
  letter-spacing:-0.01em;
}
.menu-toggle{
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  background:transparent;
  border:1px solid rgba(247,244,239,.28);
  border-radius:6px;
  color:var(--on-dark);
  cursor:pointer;
}
.menu-toggle:focus-visible{outline:3px solid var(--focus);outline-offset:2px;}
.menu-toggle span{
  display:block;width:18px;height:2px;background:currentColor;position:relative;
}
.menu-toggle span::before,
.menu-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;
}
.menu-toggle span::before{top:-6px;}
.menu-toggle span::after{top:6px;}

.side-drawer{background:var(--ink);color:var(--on-dark);width:280px;border-right:none;}
.side-drawer .offcanvas-header{border-bottom:1px solid rgba(247,244,239,.12);padding:18px 20px;}
.side-drawer .offcanvas-title{color:var(--on-dark);font-size:17px;font-weight:800;}
.side-drawer .btn-close{filter:invert(1) grayscale(1);opacity:.7;}
.side-drawer .offcanvas-body{padding:16px 12px;}
.side-drawer .side-foot{border-top:1px solid rgba(247,244,239,.12);margin-top:14px;}

/* ============ 主区域 ============ */
.shell-main{margin-left:240px;min-height:100vh;display:flex;flex-direction:column;}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:32px;padding-right:32px;}

.section{padding:96px 0;}
.section.tight{padding:72px 0;}
.section-head{margin-bottom:40px;}
.section-head .eyebrow{
  font-family:"IBM Plex Mono",monospace;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--ember);
  text-transform:uppercase;
  margin-bottom:14px;
}
.section-head h2{
  font-size:clamp(26px,3vw,38px);
  line-height:1.25;
  font-weight:700;
}
.section-head p{
  margin-top:14px;
  max-width:640px;
  color:var(--muted);
  font-size:15px;
  line-height:1.8;
}
.rule{height:1px;background:var(--line);border:0;margin:0;}

/* ============ Hero ============ */
.page-hero{
  position:relative;
  min-height:40vh;
  display:flex;
  align-items:flex-end;
  padding:80px 0 56px;
  background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;
  background-position:center 28%;
  background-repeat:no-repeat;
  color:var(--on-dark);
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background:rgba(20,18,15,.68);
}
.page-hero .container{position:relative;z-index:2;}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12.5px;
  color:rgba(247,244,239,.62);
  margin-bottom:22px;
}
.crumb a{color:rgba(247,244,239,.62);}
.crumb a:hover{color:var(--ember);}
.crumb .sep{opacity:.5;}
.crumb .current{color:var(--on-dark);}
.page-hero h1{
  color:var(--on-dark);
  font-size:clamp(30px,4.2vw,50px);
  line-height:1.16;
  font-weight:800;
  letter-spacing:-0.02em;
  max-width:840px;
}
.page-hero .sub{
  margin-top:18px;
  font-size:clamp(14px,1.4vw,17px);
  color:rgba(247,244,239,.82);
  max-width:640px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}

/* ============ 按钮 ============ */
.btn-ember,.btn-ghost{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:14px 26px;
  font-size:15px;
  font-weight:600;
  border-radius:6px;
  border:1.5px solid transparent;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  line-height:1.2;
}
.btn-ember{
  background:var(--ember);
  color:var(--on-dark);
  border-color:var(--ember);
}
.btn-ember:hover{
  background:var(--ember-deep);
  border-color:var(--ember-deep);
  color:var(--on-dark);
  transform:translateY(-1px);
}
.btn-ember .arrow{transition:transform .18s ease;}
.btn-ember:hover .arrow{transform:translateX(3px);}
.btn-ember:active{transform:translateY(0);}
.btn-ember:focus-visible,.btn-ghost:focus-visible{outline:3px solid var(--focus);outline-offset:3px;}

.btn-ghost{
  background:transparent;
  color:var(--ink);
  border-color:var(--ink);
}
.btn-ghost:hover{background:var(--ink);color:var(--on-dark);border-color:var(--ink);}
.btn-ghost:active{transform:translateY(1px);}

.on-dark .btn-ghost{color:var(--on-dark);border-color:rgba(247,244,239,.7);}
.on-dark .btn-ghost:hover{background:var(--on-dark);color:var(--ink);border-color:var(--on-dark);}

/* ============ 首屏导语 ============ */
.lede{
  padding:44px 0 0;
}
.lede p{
  font-size:17px;
  line-height:1.9;
  color:var(--body);
  max-width:860px;
  margin:0;
}

/* ============ 榜单卡 ============ */
.rank-list{display:flex;flex-direction:column;gap:16px;}
.rank-card{
  display:grid;
  grid-template-columns:96px 1fr 44px;
  gap:24px;
  align-items:center;
  padding:26px 28px;
  background:#FFFFFF;
  border:1px solid var(--line);
  border-radius:10px;
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.rank-card:hover{
  transform:translateY(-2px);
  border-color:rgba(20,18,15,.22);
  box-shadow:0 12px 32px rgba(20,18,15,.08);
}
.rank-num{
  font-family:"IBM Plex Mono","SFMono-Regular",Consolas,monospace;
  font-size:40px;
  line-height:1;
  font-weight:500;
  color:#CFC7BA;
  font-variant-numeric:tabular-nums;
  transition:color .2s ease;
}
.rank-card:hover .rank-num{color:var(--ember);}
.rank-body h3{
  font-size:20px;
  font-weight:600;
  line-height:1.4;
  margin-bottom:8px;
  transition:color .2s ease;
}
.rank-card:hover .rank-body h3{color:var(--ember);}
.rank-body p{
  margin:0;
  font-size:15px;
  color:var(--muted);
  line-height:1.75;
}
.rank-arrow{
  justify-self:end;
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:50%;
  color:var(--ink);
  font-size:16px;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.rank-card:hover .rank-arrow{
  background:var(--ember);
  border-color:var(--ember);
  color:var(--on-dark);
  transform:translateX(3px);
}

/* ============ 两栏说明 ============ */
.split{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);
  gap:56px;
  align-items:start;
}
.split-media{
  border-radius:10px;
  overflow:hidden;
  border:1px solid var(--line);
  aspect-ratio:16/10;
  background:var(--sand);
}
.split-media img{width:100%;height:100%;object-fit:cover;transition:transform .26s cubic-bezier(.2,.7,.3,1);}
.split-media:hover img{transform:scale(1.02);}
.split-copy h2{
  font-size:clamp(24px,2.6vw,34px);
  line-height:1.28;
  margin-bottom:16px;
}
.split-copy > p{color:var(--body);font-size:15.5px;line-height:1.85;}
.check-list{margin-top:26px;}
.check-item{
  display:grid;
  grid-template-columns:8px 1fr;
  gap:16px;
  padding:18px 0;
  border-top:1px solid var(--line);
  align-items:start;
}
.check-item:last-child{border-bottom:1px solid var(--line);}
.check-item .dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--pine);
  margin-top:9px;
}
.check-item h4{
  font-size:16px;
  font-weight:600;
  margin-bottom:4px;
}
.check-item p{margin:0;font-size:14px;color:var(--muted);line-height:1.7;}

/* ============ 指标 ============ */
.stat-band{
  background:var(--sand);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.stat-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
}
.stat-item{
  padding:8px 0;
  border-left:3px solid var(--ember);
  padding-left:20px;
}
.stat-item .num{
  font-family:"IBM Plex Mono","SFMono-Regular",Consolas,monospace;
  font-size:clamp(26px,3vw,36px);
  font-weight:600;
  color:var(--ink);
  font-variant-numeric:tabular-nums;
  line-height:1.1;
}
.stat-item .num small{font-size:14px;font-weight:500;color:var(--muted);margin-left:4px;}
.stat-item .cap{
  margin-top:8px;
  font-size:13.5px;
  color:var(--muted);
  line-height:1.6;
}

/* ============ FAQ ============ */
.faq-list{max-width:900px;}
.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:24px;
  padding:22px 0;
  background:transparent;
  border:0;
  text-align:left;
  font-size:18px;
  font-weight:600;
  color:var(--ink);
  cursor:pointer;
  transition:color .18s ease;
}
.faq-q:hover{color:var(--ember);}
.faq-q:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px;}
.faq-mark{
  position:relative;
  width:16px;height:16px;
  flex:0 0 auto;
}
.faq-mark::before,.faq-mark::after{
  content:"";
  position:absolute;
  background:var(--ember);
  transition:transform .22s ease,opacity .22s ease;
}
.faq-mark::before{left:0;top:7px;width:16px;height:2px;}
.faq-mark::after{left:7px;top:0;width:2px;height:16px;}
.faq-q[aria-expanded="true"] .faq-mark::after{transform:rotate(90deg);opacity:0;}
.faq-a{
  display:none;
  margin:0 0 22px;
  padding:20px 22px;
  background:var(--sand);
  border-radius:8px;
  font-size:15px;
  line-height:1.8;
  color:var(--body);
}
.faq-item.open .faq-a{display:block;}

/* ============ CTA ============ */
.cta-band{
  background:var(--ink);
  color:var(--on-dark);
  padding:80px 0;
}
.cta-band h2{
  color:var(--on-dark);
  font-size:clamp(26px,3vw,36px);
  line-height:1.25;
  max-width:640px;
}
.cta-band p{
  color:rgba(247,244,239,.72);
  margin-top:16px;
  max-width:560px;
  font-size:15.5px;
}
.cta-inner{
  display:grid;
  grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);
  gap:56px;
  align-items:center;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.cta-note{
  border:1px solid rgba(247,244,239,.2);
  border-radius:10px;
  padding:26px;
  background:rgba(247,244,239,.04);
}
.cta-note h3{
  color:var(--on-dark);
  font-size:16px;
  font-weight:600;
  margin-bottom:14px;
}
.cta-note ul li{
  display:flex;
  justify-content:space-between;
  gap:16px;
  padding:11px 0;
  border-bottom:1px solid rgba(247,244,239,.12);
  font-size:13.5px;
  color:rgba(247,244,239,.72);
}
.cta-note ul li:last-child{border-bottom:0;padding-bottom:0;}
.cta-note ul li span:last-child{color:var(--on-dark);font-weight:600;}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink);
  color:rgba(247,244,239,.72);
  padding:72px 0 0;
  border-top:1px solid rgba(247,244,239,.1);
}
.site-footer .footer-brand .brand-main{
  font-size:22px;
  font-weight:800;
  color:var(--on-dark);
  letter-spacing:-0.01em;
}
.site-footer .footer-brand .brand-sub{
  font-family:"IBM Plex Mono",monospace;
  font-size:11px;
  letter-spacing:.18em;
  color:rgba(247,244,239,.45);
  margin-top:8px;
  text-transform:uppercase;
}
.site-footer .footer-brand p{
  margin-top:18px;
  font-size:14px;
  line-height:1.8;
  color:rgba(247,244,239,.62);
  max-width:320px;
}
.footer-col h4{
  font-size:13px;
  font-weight:600;
  color:rgba(247,244,239,.7);
  letter-spacing:.02em;
  margin-bottom:18px;
}
.footer-col ul li{
  margin-bottom:10px;
  font-size:14px;
  line-height:1.6;
  color:rgba(247,244,239,.62);
}
.footer-col ul li a{color:rgba(247,244,239,.62);}
.footer-col ul li a:hover{color:var(--ember);}
.footer-col ul li a:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:3px;}
.footer-bottom{
  margin-top:56px;
  padding:24px 0;
  border-top:1px solid rgba(247,244,239,.12);
  display:flex;
  flex-wrap:wrap;
  gap:12px 24px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(247,244,239,.5);
}
.footer-bottom .links{display:flex;gap:20px;flex-wrap:wrap;}
.footer-bottom .links a{color:rgba(247,244,239,.6);}
.footer-bottom .links a:hover{color:var(--ember);}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .side-shell{width:88px;padding-top:22px;}
  .side-brand{padding:0 10px 18px;text-align:center;}
  .side-brand .brand-main{font-size:14px;line-height:1.3;}
  .side-brand .brand-sub{display:none;}
  .side-nav{padding:16px 8px 0;}
  .side-link{
    flex-direction:column;
    gap:6px;
    justify-content:center;
    padding:10px 4px;
    font-size:11.5px;
    text-align:center;
    min-height:62px;
  }
  .side-link .dot{width:4px;height:4px;}
  .side-link .label{line-height:1.25;}
  .side-foot{padding:14px 8px 0;}
  .side-foot .btn-ember{padding:10px 8px;font-size:12px;}
  .side-foot .helper{display:none;}
  .shell-main{margin-left:88px;}
  .split{gap:40px;}
  .cta-inner{gap:40px;}
}

@media (max-width:991.98px){
  .side-shell{display:none;}
  .mobile-bar{display:flex;}
  .shell-main{margin-left:0;padding-top:56px;}
  .section{padding:72px 0;}
  .section.tight{padding:56px 0;}
  .page-hero{min-height:34vh;padding:56px 0 44px;}
  .split{grid-template-columns:1fr;gap:32px;}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
  .cta-inner{grid-template-columns:1fr;gap:32px;}
  .container{padding-left:24px;padding-right:24px;}
}

@media (max-width:575.98px){
  body{font-size:16px;}
  .container{padding-left:18px;padding-right:18px;}
  .section{padding:56px 0;}
  .page-hero{padding:44px 0 36px;min-height:auto;background-position:center top;}
  .page-hero h1{font-size:clamp(26px,7vw,32px);}
  .hero-actions{gap:10px;}
  .hero-actions .btn-ember,.hero-actions .btn-ghost{width:100%;justify-content:center;}
  .rank-card{
    grid-template-columns:1fr;
    gap:14px;
    padding:22px 20px;
  }
  .rank-num{font-size:30px;}
  .rank-arrow{justify-self:start;width:40px;height:40px;}
  .stat-grid{grid-template-columns:1fr;gap:22px;}
  .cta-actions .btn-ember,.cta-actions .btn-ghost{width:100%;justify-content:center;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .faq-q{font-size:16px;gap:16px;}
  .cta-band{padding:56px 0;}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .rank-card:hover,.split-media:hover img,.btn-ember:hover{transform:none;}
}

/* roulang page: category5 */
:root{
  --ink:#14120F;
  --ember:#C05A2B;
  --ember-deep:#A64A22;
  --pine:#3F5B54;
  --paper:#F7F4EF;
  --sand:#EDE7DE;
  --line:#DAD3C8;
  --body:#4A453E;
  --muted:#8A837A;
  --on-dark:#F7F4EF;
  --focus:rgba(192,90,43,.35);
  --radius-btn:6px;
  --radius-card:10px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:"IBM Plex Mono","SFMono-Regular",Consolas,monospace;
  --bs-primary:#C05A2B;
  --bs-secondary:#3F5B54;
  --bs-body-color:#4A453E;
  --bs-body-bg:#F7F4EF;
  --bs-border-color:#DAD3C8;
  --bs-link-color:#14120F;
  --bs-link-hover-color:#C05A2B;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
  --bs-body-font-family:var(--bs-font-sans-serif);
  --bs-body-font-size:16.5px;
  --bs-body-line-height:1.85;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--body);
  font-family:var(--bs-font-sans-serif);
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:var(--ink);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--ember)}
img{max-width:100%;display:block}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding-left:0;list-style:none}
button{font-family:inherit}
::selection{background:rgba(192,90,43,.18)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}

/* ---------- 侧边栏 ---------- */
.app-sidebar{
  position:fixed;top:0;left:0;bottom:0;width:240px;
  background:var(--ink);color:var(--on-dark);
  z-index:1040;display:flex;flex-direction:column;
  padding:22px 0 18px;border-right:1px solid rgba(247,244,239,.08);
  transition:width .22s var(--ease);
}
.sidebar-inner{display:flex;flex-direction:column;height:100%;min-height:0}
.brand{display:flex;align-items:center;gap:11px;padding:0 20px 20px;margin-bottom:16px;border-bottom:1px solid rgba(247,244,239,.1)}
.brand-mark{
  width:34px;height:34px;flex:0 0 auto;border-radius:6px;background:var(--ember);
  color:#fff;display:grid;place-items:center;font-weight:700;font-size:17px;line-height:1;
}
.brand-text{min-width:0}
.brand-main{display:block;font-size:15.5px;font-weight:700;line-height:1.3;color:var(--on-dark);white-space:nowrap}
.brand-sub{display:block;margin-top:3px;font-size:10px;letter-spacing:.16em;color:rgba(247,244,239,.5);font-family:var(--mono);white-space:nowrap}
.side-nav{display:flex;flex-direction:column;gap:2px;padding:0 10px;overflow-y:auto;overscroll-behavior:contain}
.side-link{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 14px;border-radius:6px;
  color:rgba(247,244,239,.72);font-size:14.5px;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.side-link .dot{width:5px;height:5px;border-radius:50%;background:rgba(247,244,239,.32);flex:0 0 auto;transition:background .18s var(--ease),box-shadow .18s var(--ease)}
.side-link .label{white-space:nowrap}
.side-link:hover{background:rgba(247,244,239,.07);color:#fff}
.side-link:hover .dot{background:var(--ember)}
.side-link.active{color:#fff;font-weight:600;background:rgba(247,244,239,.05)}
.side-link.active .dot{background:var(--ember);box-shadow:0 0 0 3px rgba(192,90,43,.22)}
.side-link.active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
  border-radius:2px;background:var(--ember);
}
.sidebar-foot{margin-top:auto;padding:16px 20px 0;border-top:1px solid rgba(247,244,239,.1)}
.sidebar-foot p{margin-top:10px;font-size:11.5px;line-height:1.65;color:rgba(247,244,239,.5)}

/* ---------- 按钮 ---------- */
.btn-ember,.btn-ghost,.btn-ghost-light{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);font-size:15px;font-weight:600;
  padding:13px 26px;line-height:1.2;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn-ember{background:var(--ember);border:1px solid var(--ember);color:var(--on-dark)}
.btn-ember .arrow{transition:transform .18s var(--ease)}
.btn-ember:hover{background:var(--ember-deep);border-color:var(--ember-deep);color:#fff;transform:translateY(-1px)}
.btn-ember:hover .arrow{transform:translateX(3px)}
.btn-ember:active{transform:translateY(0)}
.btn-ghost{background:transparent;border:1.5px solid var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--on-dark)}
.btn-ghost:active{transform:translateY(1px)}
.btn-ghost-light{background:transparent;border:1.5px solid rgba(247,244,239,.55);color:var(--on-dark)}
.btn-ghost-light:hover{background:var(--on-dark);color:var(--ink);border-color:var(--on-dark)}
.btn-ember:focus-visible,.btn-ghost:focus-visible,.btn-ghost-light:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.side-cta{width:100%;padding:12px 8px;font-size:14px;white-space:nowrap}

/* ---------- 移动端顶栏 ---------- */
.mobile-bar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:1035;
  align-items:center;justify-content:space-between;gap:12px;
  padding:0 16px;background:var(--ink);border-bottom:1px solid rgba(247,244,239,.12);
}
.mobile-bar .bar-brand{display:flex;align-items:center;gap:9px;color:var(--on-dark);font-weight:700;font-size:15px}
.mobile-bar .brand-mark{width:28px;height:28px;font-size:14px}
.burger{
  width:42px;height:42px;border-radius:6px;background:transparent;
  border:1px solid rgba(247,244,239,.28);display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:4px;cursor:pointer;
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.burger span{display:block;width:17px;height:2px;border-radius:1px;background:var(--on-dark)}
.burger:hover{border-color:var(--ember);background:rgba(192,90,43,.12)}

/* ---------- offcanvas 抽屉 ---------- */
.side-drawer{background:var(--ink);color:var(--on-dark);width:286px;border-right:1px solid rgba(247,244,239,.12)}
.side-drawer .offcanvas-header{border-bottom:1px solid rgba(247,244,239,.12);padding:16px 18px}
.drawer-title{font-size:15px;font-weight:700;color:var(--on-dark)}
.drawer-close{
  width:34px;height:34px;border-radius:6px;background:transparent;border:1px solid rgba(247,244,239,.28);
  color:var(--on-dark);font-size:18px;line-height:1;cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.drawer-close:hover{border-color:var(--ember);color:var(--ember)}
.side-drawer .offcanvas-body{display:flex;flex-direction:column;padding:16px 0 22px}
.drawer-foot{margin-top:auto;padding:18px 20px 0;border-top:1px solid rgba(247,244,239,.1)}
.drawer-foot p{margin-top:10px;font-size:11.5px;color:rgba(247,244,239,.5);line-height:1.6}

/* ---------- 主内容 ---------- */
.main-wrap{margin-left:240px;min-height:100vh;display:flex;flex-direction:column;transition:margin-left .22s var(--ease)}
.page-container{width:100%;max-width:1200px;margin:0 auto;padding-left:clamp(20px,4vw,48px);padding-right:clamp(20px,4vw,48px)}
.main-wrap .container{max-width:1200px}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;color:var(--on-dark);
  padding:clamp(46px,6vw,80px) 0 clamp(40px,5vw,64px);
  background-image:linear-gradient(180deg,rgba(20,18,15,.76),rgba(20,18,15,.66)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center 62%;background-repeat:no-repeat;
}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:rgba(247,244,239,.6);margin-bottom:22px}
.crumbs a{color:rgba(247,244,239,.72)}
.crumbs a:hover{color:var(--ember)}
.crumbs .sep{color:rgba(247,244,239,.35)}
.crumbs .cur{color:var(--on-dark)}
.eyebrow{display:inline-block;font-size:12px;font-weight:600;color:var(--ember);margin-bottom:14px}
.page-hero .eyebrow{color:#E08A5F}
.page-hero h1{
  font-size:clamp(28px,3.6vw,46px);font-weight:800;line-height:1.16;
  letter-spacing:-.015em;margin:0 0 16px;max-width:20ch;color:var(--on-dark);
}
.hero-sub{font-size:clamp(15px,1.5vw,17px);color:rgba(247,244,239,.85);max-width:56ch;margin-bottom:22px}
.hero-lead{
  font-size:15px;line-height:1.9;color:rgba(247,244,239,.76);
  max-width:60ch;padding-left:16px;border-left:3px solid var(--ember);margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero-note{margin-top:18px;font-size:12.5px;color:rgba(247,244,239,.6);font-family:var(--mono)}

/* ---------- 板块 ---------- */
.section{padding:clamp(52px,6.4vw,88px) 0}
.section + .section{border-top:1px solid var(--line)}
.section--muted{background:var(--paper)}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  padding-bottom:20px;margin-bottom:34px;border-bottom:1px solid var(--line);
}
.section-title{font-size:clamp(24px,2.7vw,34px);font-weight:700;line-height:1.28;color:var(--ink);margin-top:6px}
.section-note{font-size:13px;color:var(--muted);max-width:30ch;text-align:right}
.group-lead{font-size:14.5px;color:var(--muted);margin-bottom:8px;max-width:60ch}

/* ---------- 时效条目 ---------- */
.spec-list{}
.spec-item{display:flex;gap:20px;align-items:baseline;padding:16px 0;border-bottom:1px solid var(--line)}
.spec-item:first-child{border-top:1px solid var(--line)}
.spec-key{flex:0 0 38%;font-size:16.5px;font-weight:600;color:var(--ink)}
.spec-val{font-size:15px;color:var(--body)}
.spec-foot{margin-top:18px;font-size:13px;color:var(--muted)}
.figure{
  margin:0;aspect-ratio:16/10;overflow:hidden;border-radius:var(--radius-card);
  border:1px solid var(--line);background:var(--sand);
}
.figure img{width:100%;height:100%;object-fit:cover;transition:transform .26s var(--ease)}
.figure:hover img{transform:scale(1.02)}
.fig-cap{margin-top:12px;font-size:12.5px;color:var(--muted)}

/* ---------- FAQ 折叠 ---------- */
.faq-wrap{max-width:920px}
.faq-acc .accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.faq-acc .accordion-item:first-of-type{border-top:1px solid var(--line)}
.faq-acc .accordion-header{margin:0;font-size:inherit}
.faq-acc .accordion-button{
  position:relative;width:100%;display:flex;align-items:center;
  background:transparent;border:0;border-radius:0;
  padding:20px 46px 20px 0;gap:16px;text-align:left;
  font-size:17px;font-weight:600;line-height:1.5;color:var(--ink);
  box-shadow:none;transition:color .18s var(--ease);
}
.faq-acc .accordion-button:not(.collapsed){color:var(--ember)}
.faq-acc .accordion-button:hover{color:var(--ember)}
.faq-acc .accordion-button:focus{box-shadow:none}
.faq-acc .accordion-button:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.faq-acc .accordion-button::after{display:none}
.plus{
  position:absolute;right:2px;top:50%;width:15px;height:15px;
  transform:translateY(-50%);transition:transform .22s var(--ease);
}
.plus::before,.plus::after{content:"";position:absolute;background:var(--ember);border-radius:1px}
.plus::before{left:0;top:6.5px;width:15px;height:2px}
.plus::after{left:6.5px;top:0;width:2px;height:15px}
.faq-acc .accordion-button:not(.collapsed) .plus{transform:translateY(-50%) rotate(45deg)}
.faq-acc .accordion-collapse{border:0}
.faq-acc .accordion-body{
  background:var(--sand);border-radius:8px;padding:18px 20px;
  margin:0 0 20px;font-size:15px;line-height:1.85;color:var(--body);
}

/* ---------- CTA 带 ---------- */
.cta-band{background:var(--ink);color:var(--on-dark);padding:clamp(42px,5vw,66px) 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(23px,2.6vw,32px);font-weight:700;line-height:1.3;color:var(--on-dark);margin:0 0 12px}
.cta-inner p{font-size:14.5px;color:rgba(247,244,239,.7);max-width:46ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(247,244,239,.72);padding:clamp(48px,6vw,72px) 0 0;margin-top:auto}
.footer-brand .brand-main{font-size:18px;font-weight:700;color:var(--on-dark);letter-spacing:.01em}
.footer-brand .brand-sub{color:rgba(247,244,239,.45)}
.footer-brand p{margin-top:14px;font-size:13.5px;line-height:1.85;color:rgba(247,244,239,.6);max-width:34ch}
.footer-col h4{font-size:13px;font-weight:600;color:rgba(247,244,239,.55);margin-bottom:14px}
.footer-col ul{display:flex;flex-direction:column;gap:10px;font-size:14px}
.footer-col a{color:rgba(247,244,239,.76)}
.footer-col a:hover{color:var(--ember)}
.footer-col li{color:rgba(247,244,239,.66)}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  margin-top:42px;padding:20px 0 26px;font-size:12.5px;color:rgba(247,244,239,.5);
  border-top:1px solid rgba(247,244,239,.12);
}
.footer-bottom .links{display:flex;gap:18px;flex-wrap:wrap}
.footer-bottom .links a{color:rgba(247,244,239,.62)}
.footer-bottom .links a:hover{color:var(--ember)}

/* ---------- 响应式 ---------- */
@media (min-width:992px) and (max-width:1199.98px){
  .app-sidebar{width:88px;padding-top:18px}
  .app-sidebar .brand{justify-content:center;padding:0 0 16px;gap:0}
  .app-sidebar .brand-text{display:none}
  .app-sidebar .side-link{justify-content:center;padding:0;gap:0}
  .app-sidebar .side-link .label{display:none}
  .app-sidebar .sidebar-foot{padding:14px 8px 0;text-align:center}
  .app-sidebar .sidebar-foot p{display:none}
  .app-sidebar .side-cta{font-size:12px;padding:10px 4px}
  .app-sidebar:hover{width:240px;box-shadow:0 12px 32px rgba(20,18,15,.28)}
  .app-sidebar:hover .brand{justify-content:flex-start;padding:0 20px 20px;gap:11px}
  .app-sidebar:hover .brand-text{display:block}
  .app-sidebar:hover .side-link{justify-content:flex-start;padding:0 14px;gap:10px}
  .app-sidebar:hover .side-link .label{display:inline}
  .app-sidebar:hover .sidebar-foot{padding:16px 20px 0;text-align:left}
  .app-sidebar:hover .sidebar-foot p{display:block}
  .app-sidebar:hover .side-cta{font-size:14px;padding:12px 8px}
  .main-wrap{margin-left:88px}
}
@media (max-width:991.98px){
  .app-sidebar{display:none}
  .mobile-bar{display:flex}
  .main-wrap{margin-left:0;padding-top:56px}
  .page-hero{background-position:center 40%}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px}
  .section-note{text-align:left;max-width:100%}
  .spec-item{flex-direction:column;gap:4px;align-items:flex-start}
  .spec-key{flex:0 0 auto}
}
@media (max-width:767.98px){
  body{font-size:16px}
  .page-hero h1{max-width:100%}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn-ember,.hero-actions .btn-ghost,.hero-actions .btn-ghost-light{width:100%;min-height:46px}
  .cta-actions{width:100%}
  .cta-actions .btn-ember,.cta-actions .btn-ghost-light{width:100%;min-height:46px}
  .faq-acc .accordion-button{font-size:16px;padding:18px 42px 18px 0}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .figure:hover img,.btn-ember:hover{transform:none}
}