/* roulang page: index */
:root{
  --brand:#FF5A1F;
  --brand-deep:#C93C0F;
  --accent:#12B5A6;
  --ink:#16130F;
  --ink-soft:#4A423A;
  --paper:#F7F4EF;
  --surface:#FFFFFF;
  --line:rgba(22,19,15,.12);
  --shadow-1:0 1px 2px rgba(22,19,15,.05);
  --shadow-2:0 14px 34px -14px rgba(22,19,15,.22);
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-h:76px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  background:var(--paper);
  color:var(--ink-soft);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.no-scroll{overflow:hidden}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:800;line-height:1.25;letter-spacing:-.01em}
h1{font-size:clamp(34px,5vw,60px);font-weight:900;line-height:1.12;letter-spacing:-.02em}
h2{font-size:clamp(26px,3vw,36px);font-weight:800}
h3{font-size:20px;font-weight:700;line-height:1.4}
p{margin:0 0 18px}
a{color:var(--ink);text-decoration:none;transition:color .16s var(--ease)}
a:hover{color:var(--brand)}
img{max-width:100%;display:block}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.reading{max-width:720px}
.section{padding:96px 0}
.section--surface{background:var(--surface)}
.section--paper{background:var(--paper)}
.section--tight{padding:72px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--brand);margin-bottom:18px;
}
.eyebrow::before{content:"";width:22px;height:6px;border-radius:2px;background:var(--brand)}
.lead{font-size:17px;color:var(--ink-soft);line-height:1.9}
.muted{color:var(--ink-soft);font-size:13px;line-height:1.6}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;cursor:pointer;border:0;
  transition:transform .28s var(--ease),background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),box-shadow .28s var(--ease);
  text-align:center;line-height:1;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px -12px rgba(255,90,31,.9)}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink);padding:0 26px}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}
.btn-ghost-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.5)}
.btn-ghost-light:hover{background:#fff;color:var(--ink);border-color:#fff}
.btn-sm{height:44px;padding:0 20px;font-size:14px}
.btn:focus-visible,a:focus-visible,summary:focus-visible,.accordion-title:focus-visible{
  outline:2px solid var(--accent);outline-offset:3px;border-radius:6px;
}
.textlink{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:700;color:var(--ink);
  border-bottom:1px solid var(--accent);padding-bottom:2px;transition:color .16s var(--ease),border-color .16s var(--ease);
}
.textlink:hover{color:var(--brand);border-color:var(--brand)}
.textlink i{font-size:12px}

/* badges */
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:700;
  padding:4px 12px;border-radius:999px;background:rgba(18,181,166,.12);color:#0B7C72;white-space:nowrap;
}
.badge--brand{background:rgba(255,90,31,.12);color:var(--brand-deep)}

/* header */
.site-header{
  position:absolute;top:0;left:0;right:0;z-index:90;
  background:rgba(247,244,239,.62);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 2px rgba(22,19,15,.04);
  transition:background-color .28s var(--ease),box-shadow .28s var(--ease),height .28s var(--ease);
}
.site-header.is-stuck{
  position:fixed;background:var(--surface);
  box-shadow:0 10px 30px -18px rgba(22,19,15,.35);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:var(--nav-h);transition:height .28s var(--ease);
}
.site-header.is-stuck .nav-inner{height:62px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:900;letter-spacing:-.02em}
.logo-mark{display:inline-flex;color:var(--ink)}
.logo-text{display:flex;flex-direction:column;line-height:1.1}
.logo-text b{font-size:18px;font-weight:900;letter-spacing:-.02em}
.logo-text span{font-size:11px;font-weight:600;letter-spacing:.16em;color:var(--ink-soft);text-transform:uppercase}
.nav-main{display:flex;align-items:center;gap:34px}
.nav-main a{
  position:relative;font-size:15px;font-weight:600;color:var(--ink);padding:6px 0;
}
.nav-main a::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--brand);
  transition:width .28s var(--ease);
}
.nav-main a:hover{color:var(--brand)}
.nav-main a:hover::after{width:100%}
.nav-main a.is-active{color:var(--brand)}
.nav-main a.is-active::after{width:100%}
.nav-tools{display:flex;align-items:center;gap:14px}
.nav-search{
  width:44px;height:44px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
  color:var(--ink);border:1px solid var(--line);background:rgba(255,255,255,.5);
  transition:background-color .16s var(--ease),color .16s var(--ease),transform .28s var(--ease);
}
.nav-search:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:rgba(255,255,255,.6);color:var(--ink);font-size:17px;cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-drawer{
  position:fixed;inset:0;z-index:120;background:rgba(247,244,239,.96);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  display:flex;flex-direction:column;padding:24px;
  transform:translateY(-100%);opacity:0;visibility:hidden;
  transition:transform .36s var(--ease),opacity .28s var(--ease),visibility .36s;
}
.nav-drawer.is-open{transform:translateY(0);opacity:1;visibility:visible}
.drawer-top{display:flex;align-items:center;justify-content:space-between;height:56px}
.drawer-close{width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:#fff;font-size:18px;color:var(--ink);cursor:pointer}
.drawer-links{margin-top:32px;display:flex;flex-direction:column;gap:6px;flex:1}
.drawer-links a{font-size:18px;font-weight:700;padding:14px 0;border-bottom:1px solid var(--line);color:var(--ink)}
.drawer-links a.is-active{color:var(--brand)}
.drawer-foot{display:flex;flex-direction:column;gap:12px;padding-top:20px}

/* hero */
.hero{
  position:relative;overflow:hidden;padding:calc(var(--nav-h) + 82px) 0 96px;
  background-color:var(--paper);
  background-image:linear-gradient(rgba(247,244,239,.90),rgba(247,244,239,.96)),url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center}
.hero h1{margin-bottom:20px}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero-sub{font-size:18px;line-height:1.85;color:var(--ink-soft);max-width:560px;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:28px}
.hero-stats{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--ink-soft)}
.hero-stats i.dot{width:5px;height:5px;border-radius:50%;background:var(--accent);display:inline-block;margin:0 4px}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;border-radius:var(--r-img);border:1px solid var(--line);
  box-shadow:var(--shadow-2);transition:transform .56s var(--ease);
}
.hero-visual:hover img{transform:translateY(-4px)}
.hero-float{
  position:absolute;left:-16px;bottom:-18px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:16px 20px;box-shadow:var(--shadow-2);min-width:190px;
}
.hero-float b{display:block;font-size:30px;font-weight:900;color:var(--ink);line-height:1.1}
.hero-float span{font-size:13px;color:var(--ink-soft)}

/* numbered points */
.points{display:grid;grid-template-columns:1.35fr 1fr;gap:32px;margin-top:52px}
.points .point--wide{grid-column:1/-1;display:grid;grid-template-columns:1fr 1.6fr;gap:32px;align-items:start;padding-bottom:32px;border-bottom:1px solid var(--line)}
.point{position:relative;padding-top:26px;border-top:2px solid var(--ink)}
.point .num{font-size:52px;font-weight:900;line-height:1;color:rgba(22,19,15,.14);letter-spacing:-.04em;display:block;margin-bottom:14px}
.point h3{margin-bottom:10px}
.point p{margin:0;font-size:15px;line-height:1.85}
.point .num--brand{color:var(--brand)}

/* scenes tabs */
.tabs-head{margin-top:8px}
ul.tabs{
  border-bottom:1px solid var(--line);background:transparent;display:flex;flex-wrap:wrap;gap:8px;margin:0;
}
ul.tabs::before{display:none}
ul.tabs li a{
  display:block;padding:14px 6px;margin-right:26px;font-size:16px;font-weight:700;color:var(--ink-soft);
  border-bottom:2px solid transparent;background:transparent;transition:color .16s var(--ease),border-color .16s var(--ease);
}
ul.tabs li a:hover{color:var(--brand);background:transparent}
ul.tabs li.is-active a{color:var(--brand);border-bottom-color:var(--brand);background:transparent}
.tabs-panel{padding:40px 0 0;background:transparent}
.scene{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.scene.reverse .scene-media{order:2}
.scene-media img{width:100%;border-radius:var(--r-img);border:1px solid var(--line);box-shadow:var(--shadow-1)}
.scene-list{margin:18px 0 22px}
.scene-list li{position:relative;padding-left:20px;margin-bottom:10px;font-size:15px;line-height:1.8}
.scene-list li::before{content:"";position:absolute;left:0;top:12px;width:8px;height:2px;background:var(--accent)}

/* stats + logos + quotes */
.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;padding-bottom:52px;border-bottom:1px solid var(--line)}
.stat b{display:block;font-size:clamp(34px,4vw,52px);font-weight:900;color:var(--ink);line-height:1;letter-spacing:-.03em}
.stat span{display:block;margin-top:10px;font-size:13px;color:var(--ink-soft)}
.logo-wall{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;margin-top:52px}
.logo-wall div{
  background:var(--surface);padding:26px 12px;text-align:center;font-size:15px;font-weight:700;color:rgba(22,19,15,.42);
  transition:color .28s var(--ease),background-color .28s var(--ease);letter-spacing:.02em;
}
.logo-wall div:hover{color:var(--brand);background:#fff}
.quotes{display:grid;grid-template-columns:1fr 1fr;gap:32px;margin-top:52px}
.quote{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:32px;
  box-shadow:var(--shadow-1);transition:box-shadow .28s var(--ease),transform .28s var(--ease);
}
.quote:hover{box-shadow:var(--shadow-2);transform:translateY(-4px)}
.quote .mark{font-family:Georgia,serif;font-size:52px;line-height:.7;color:var(--brand);display:block;margin-bottom:14px}
.quote p{font-size:16px;color:var(--ink);line-height:1.85;margin-bottom:18px}
.quote .who{font-size:15px;font-weight:700;color:var(--ink)}
.quote .role{font-size:13px;color:var(--ink-soft)}

/* latest cms */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap}
.feature-card{
  display:grid;grid-template-columns:1.15fr 1fr;gap:0;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-1);
  transition:box-shadow .28s var(--ease),transform .28s var(--ease);margin-bottom:18px;
}
.feature-card:hover{box-shadow:var(--shadow-2);transform:translateY(-4px)}
.feature-card .fc-media{position:relative;overflow:hidden;aspect-ratio:16/9;background:#ece7e0}
.feature-card .fc-media img{width:100%;height:100%;object-fit:cover;transition:transform .56s var(--ease)}
.feature-card:hover .fc-media img{transform:scale(1.03)}
.feature-card .fc-body{padding:34px 36px;display:flex;flex-direction:column;justify-content:center}
.feature-card h3{font-size:23px;margin:14px 0 12px}
.feature-card p{font-size:15px;margin:0 0 18px}
.post-row{
  display:grid;grid-template-columns:112px 1fr;gap:24px;align-items:center;
  padding:20px 4px;border-bottom:1px solid var(--line);
  transition:transform .28s var(--ease),background-color .16s var(--ease);
}
.post-row:hover{transform:translateX(2px)}
.post-row:hover h4{color:var(--brand)}
.post-row .date{font-size:13px;color:var(--ink-soft);letter-spacing:.02em}
.post-row h4{font-size:17px;font-weight:700;color:var(--ink);margin:0;line-height:1.5;transition:color .16s var(--ease)}
.post-row .meta{margin-top:6px;font-size:13px;color:var(--ink-soft);display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.empty-state{
  text-align:center;padding:64px 24px;background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-card);
}
.empty-state i{font-size:36px;color:rgba(22,19,15,.18);display:block;margin-bottom:16px}
.empty-state p{font-size:15px;margin-bottom:14px}

/* faq */
.accordion{border:0;background:transparent}
.accordion .accordion-item{border:1px solid var(--line);border-radius:var(--r-card);background:var(--surface);margin-bottom:14px;overflow:hidden;box-shadow:var(--shadow-1)}
.accordion .accordion-title{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 26px;font-size:17px;font-weight:700;color:var(--ink);border:0;background:transparent;
  transition:color .16s var(--ease);
}
.accordion .accordion-title:hover{color:var(--brand);background:transparent}
.accordion .accordion-title::before{display:none}
.accordion .accordion-title i{font-size:15px;color:var(--brand);transition:transform .28s var(--ease);flex:none}
.accordion .accordion-item.is-active .accordion-title i{transform:rotate(45deg)}
.accordion .accordion-content{padding:0 26px 24px;border:0;background:transparent}
.accordion .accordion-content p{font-size:15px;line-height:1.8;margin:0;color:var(--ink-soft)}

/* cta band */
.cta-band{background:var(--ink);color:var(--paper);padding:0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;min-height:340px;padding:64px 0}
.cta-inner h2{color:#fff;font-size:clamp(24px,3vw,34px);max-width:520px;margin-bottom:12px}
.cta-inner p{color:rgba(247,244,239,.72);margin:0;font-size:15px;max-width:560px}

/* footer */
.site-footer{background:var(--ink);color:rgba(247,244,239,.72);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:4fr 3fr 3fr 2fr;gap:40px;padding-bottom:52px}
.site-footer h4{color:#fff;font-size:15px;font-weight:800;margin-bottom:18px;letter-spacing:.02em}
.site-footer a{color:rgba(247,244,239,.72);font-size:14px}
.site-footer a:hover{color:var(--brand)}
.site-footer p{font-size:14px;line-height:1.85;color:rgba(247,244,239,.62);margin:14px 0 0}
.footer-brand .logo{color:#fff}
.footer-brand .logo-mark{color:#fff}
.footer-brand .logo-text span{color:rgba(247,244,239,.55)}
.footer-links li{margin-bottom:12px}
.footer-contact li{margin-bottom:12px;font-size:14px;display:flex;gap:10px;align-items:flex-start}
.footer-contact i{color:var(--accent);margin-top:6px;font-size:12px}
.footer-bottom{
  border-top:1px solid rgba(247,244,239,.14);display:flex;align-items:center;justify-content:space-between;
  gap:20px;padding:22px 0;flex-wrap:wrap;
}
.footer-bottom p{margin:0;font-size:13px;color:rgba(247,244,239,.55)}
.to-top{
  display:inline-flex;align-items:center;gap:8px;background:transparent;border:1px solid rgba(247,244,239,.28);
  color:rgba(247,244,239,.8);height:40px;padding:0 18px;border-radius:999px;cursor:pointer;font-size:13px;
  transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.to-top:hover{background:#fff;color:var(--ink);border-color:#fff}

/* sticky cta */
.mobile-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:100;display:flex;gap:12px;align-items:center;
  padding:10px 16px;background:var(--surface);border-top:1px solid var(--line);
  box-shadow:0 -8px 24px -18px rgba(22,19,15,.5);
  transform:translateY(110%);transition:transform .36s var(--ease);
}
.mobile-cta.is-show{transform:translateY(0)}
.mobile-cta .btn{flex:1}
body{padding-bottom:80px}

/* reveal */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .56s var(--ease),transform .56s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

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

@media (min-width:1025px){
  .mobile-cta{
    left:50%;right:auto;bottom:24px;transform:translate(-50%,140%);
    border-radius:999px;border:1px solid var(--line);padding:10px 14px;gap:10px;width:auto;
  }
  .mobile-cta.is-show{transform:translate(-50%,0)}
  .mobile-cta .btn{flex:none}
  body{padding-bottom:0}
}

@media (max-width:1024px){
  .nav-main,.nav-search{display:none}
  .nav-toggle{display:inline-flex}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero{padding-top:calc(var(--nav-h) + 60px);padding-bottom:72px}
  .points{grid-template-columns:1fr;gap:36px}
  .points .point--wide{grid-template-columns:1fr;gap:18px}
  .scene{grid-template-columns:1fr;gap:28px}
  .scene.reverse .scene-media{order:0}
  .stat-strip{grid-template-columns:repeat(2,1fr);gap:26px}
  .logo-wall{grid-template-columns:repeat(2,1fr)}
  .quotes{grid-template-columns:1fr}
  .feature-card{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .section{padding:72px 0}
}

@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .cta-inner{flex-direction:column;align-items:flex-start;min-height:auto;padding:56px 0}
  .hero-float{position:static;margin-top:18px;display:inline-block}
  .post-row{grid-template-columns:1fr;gap:6px;padding:16px 2px}
  .post-row .date{order:-1}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  ul.tabs li a{margin-right:18px;font-size:15px;padding:12px 2px}
}

@media (max-width:520px){
  h1{font-size:32px}
  .feature-card .fc-body{padding:24px 22px}
  .quote{padding:24px}
  .logo-wall{grid-template-columns:1fr}
  .points .num{font-size:44px}
  .hero-actions .btn{width:100%}
}

/* roulang page: article */
:root{
  --brand:#FF5A1F;
  --brand-deep:#C93C0F;
  --accent:#12B5A6;
  --ink:#16130F;
  --ink-soft:#4A423A;
  --paper:#F7F4EF;
  --surface:#FFFFFF;
  --line:rgba(22,19,15,.12);
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --sh1:0 1px 2px rgba(22,19,15,.05);
  --sh2:0 14px 34px -14px rgba(22,19,15,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
  --container:1200px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-soft);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{display:block;max-width:100%;height:auto;border-radius:var(--radius-img);}
a{color:inherit;text-decoration:none;transition:color .16s var(--ease);}
a:hover{color:var(--brand);}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.3;}
p{margin:0 0 20px;}
ul,ol{margin:0 0 20px;padding-left:1.3em;}
button{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{
  position:absolute;
  top:0;left:0;right:0;
  z-index:60;
  background:rgba(247,244,239,.62);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 2px rgba(22,19,15,.05);
  transition:background .28s var(--ease),box-shadow .28s var(--ease);
}
.site-header.is-stuck{
  position:fixed;
  background:var(--surface);
  box-shadow:0 10px 30px -20px rgba(22,19,15,.5);
}
.nav-inner{display:flex;align-items:center;gap:24px;height:76px;transition:height .28s var(--ease);}
.site-header.is-stuck .nav-inner{height:62px;}

.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);flex:0 0 auto;}
.logo:hover{color:var(--ink);}
.logo-mark{display:inline-flex;color:var(--ink);}
.logo-text{display:flex;flex-direction:column;line-height:1.12;}
.logo-text b{font-size:17px;font-weight:900;letter-spacing:-.02em;color:inherit;}
.logo-text span{font-size:11px;letter-spacing:.14em;color:var(--ink-soft);}

.nav-main{display:flex;align-items:center;gap:30px;margin:0 auto;}
.nav-main a{position:relative;font-size:15px;font-weight:600;color:var(--ink);padding:6px 0;}
.nav-main a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--brand);transition:width .28s var(--ease);
}
.nav-main a:hover{color:var(--brand);}
.nav-main a:hover::after,.nav-main a.is-active::after{width:100%;}

.nav-tools{display:flex;align-items:center;gap:14px;flex:0 0 auto;}
.nav-search{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.55);color:var(--ink);
  transition:all .16s var(--ease);
}
.nav-search:hover{color:var(--brand);border-color:rgba(255,90,31,.42);background:var(--surface);}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--radius-btn);
  border:1px solid var(--line);background:rgba(255,255,255,.55);color:var(--ink);cursor:pointer;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:700;letter-spacing-.01em;
  border:1.5px solid transparent;cursor:pointer;
  transition:background .28s var(--ease),color .28s var(--ease),border-color .28s var(--ease),transform .28s var(--ease),box-shadow .28s var(--ease);
}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-deep);border-color:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--sh2);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}

/* ---------- badges / tags ---------- */
.badge{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:999px;
  font-size:13px;font-weight:600;letter-spacing:.02em;
  background:rgba(18,181,166,.14);color:#0B7C71;
}
.badge-brand{background:rgba(255,90,31,.13);color:var(--brand-deep);}
.tag{
  display:inline-flex;align-items:center;height:32px;padding:0 16px;border-radius:999px;
  font-size:13px;font-weight:600;background:rgba(18,181,166,.12);color:#0B7C71;
  transition:background .16s var(--ease),color .16s var(--ease);
}
.tag:hover{background:var(--brand);color:#fff;}

/* ---------- page head ---------- */
.page-head{position:relative;padding:152px 0 56px;overflow:hidden;background-color:var(--paper);}
.page-head::before{
  content:"";position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-1.png);
  background-size:cover;background-position:center;
  opacity:.14;
}
.page-head::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(247,244,239,.55) 0%,rgba(247,244,239,.94) 74%,var(--paper) 100%);
}
.page-head .container{position:relative;z-index:2;}

.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-soft);margin-bottom:20px;}
.breadcrumb a{color:var(--ink-soft);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{opacity:.42;}

.hero-rule{display:block;width:60px;height:6px;border-radius:3px;background:var(--brand);margin:0 0 20px;}
.page-head h1{
  font-size:clamp(28px,4.2vw,44px);
  font-weight:900;line-height:1.2;letter-spacing:-.02em;
  max-width:840px;margin:14px 0 20px;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:var(--ink-soft);}
.meta-row i{color:var(--accent);margin-right:4px;}
.meta-row .dot{width:3px;height:3px;border-radius:50%;background:var(--accent);flex:0 0 auto;}

/* ---------- article ---------- */
.article-wrap{max-width:808px;margin:0 auto;padding:56px 24px 0;}
.article-body{font-size:17px;line-height:1.9;color:var(--ink-soft);}
.article-body p{margin:0 0 20px;}
.article-body > p:first-child{font-size:18px;color:var(--ink);}
.article-body h2{
  position:relative;font-size:clamp(22px,2.6vw,30px);font-weight:800;line-height:1.35;
  margin:48px 0 16px;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;border-radius:3px;background:var(--brand);
}
.article-body h3{font-size:20px;font-weight:700;margin:32px 0 12px;}
.article-body h4{font-size:17px;font-weight:700;margin:24px 0 10px;}
.article-body blockquote{
  margin:28px 0;padding:20px 24px;
  background:var(--paper);border-left:3px solid var(--line);
  border-radius:0 var(--radius-card) var(--radius-card) 0;color:var(--ink);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body ul,.article-body ol{line-height:1.9;}
.article-body li{margin-bottom:8px;}
.article-body ul li::marker,.article-body ol li::marker{color:var(--brand);font-weight:700;}
.article-body img{margin:28px 0;border-radius:var(--radius-img);border:1px solid var(--line);}
.article-body figure{margin:28px 0;}
.article-body figcaption{font-size:13px;color:var(--ink-soft);text-align:center;margin-top:10px;}
.article-body table{width:100%;border-collapse:collapse;margin:28px 0;font-size:15px;display:block;overflow-x:auto;}
.article-body th{background:var(--paper);text-align:left;font-weight:700;color:var(--ink);}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);white-space:nowrap;}
.article-body a{color:var(--ink);border-bottom:1px solid var(--accent);}
.article-body a:hover{color:var(--brand);border-color:var(--brand);}
.article-body strong{color:var(--ink);}

.empty-state{
  text-align:center;padding:64px 24px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--sh1);
}
.empty-state i{font-size:36px;color:var(--accent);margin-bottom:18px;display:block;}
.empty-state h2{font-size:22px;margin-bottom:10px;}
.empty-state p{margin-bottom:24px;}

.tag-row{
  display:flex;flex-wrap:wrap;gap:10px;
  margin:48px 0 0;padding-top:32px;border-top:1px solid var(--line);
}

.related{margin-top:64px;}
.related h2{font-size:24px;font-weight:800;margin-bottom:22px;}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.rel-card{
  display:flex;flex-direction:column;gap:14px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--sh1);
  transition:box-shadow .28s var(--ease),transform .28s var(--ease);
}
.rel-card:hover{box-shadow:var(--sh2);transform:translateY(-4px);color:inherit;}
.rel-card h3{font-size:17px;font-weight:700;line-height:1.55;margin:0;}
.rel-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--ink-soft);}
.rel-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--accent);}

.back-row{margin:44px 0 0;text-align:center;}

/* ---------- cta band ---------- */
.cta-band{background:var(--ink);color:var(--paper);margin-top:96px;padding:72px 0;}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-band h2{color:var(--paper);font-size:clamp(22px,3vw,30px);font-weight:900;letter-spacing:-.02em;}
.cta-band p{color:rgba(247,244,239,.72);margin:12px 0 0;max-width:560px;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(247,244,239,.7);padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:4fr 3fr 3fr 2fr;gap:40px;padding-bottom:48px;}
.site-footer h4{color:var(--paper);font-size:15px;font-weight:800;margin-bottom:18px;letter-spacing:.02em;}
.footer-brand .logo{color:var(--paper);margin-bottom:16px;}
.footer-brand .logo-text span{color:rgba(247,244,239,.58);}
.footer-brand p{font-size:14px;line-height:1.8;margin:0;max-width:330px;}
.footer-links{list-style:none;margin:0;padding:0;display:grid;gap:12px;}
.footer-links a{font-size:14px;color:rgba(247,244,239,.72);}
.footer-links a:hover{color:var(--brand);}
.footer-contact{list-style:none;margin:0;padding:0;display:grid;gap:12px;font-size:14px;}
.footer-contact i{color:var(--accent);margin-right:8px;}
.footer-bottom{
  border-top:1px solid rgba(247,244,239,.14);
  padding:22px 0;display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:13px;
}
.footer-bottom p{margin:0;}
.to-top{
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 16px;
  border-radius:999px;background:transparent;border:1px solid rgba(247,244,239,.28);
  color:var(--paper);font-size:13px;cursor:pointer;
  transition:background .16s var(--ease),border-color .16s var(--ease),color .16s var(--ease);
}
.to-top:hover{background:var(--brand);border-color:var(--brand);color:#fff;}

/* ---------- mobile bar ---------- */
.mobile-bar{display:none;}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .nav-main{display:none;}
  .nav-main.is-open{
    display:flex;position:fixed;inset:0;flex-direction:column;align-items:flex-start;
    margin:0;gap:0;padding:118px 24px 40px;z-index:75;overflow-y:auto;
    background:rgba(247,244,239,.96);
    -webkit-backdrop-filter:blur(16px) saturate(140%);
    backdrop-filter:blur(16px) saturate(140%);
  }
  .nav-main.is-open a{width:100%;padding:16px 4px;font-size:18px;font-weight:700;border-bottom:1px solid var(--line);}
  .nav-main.is-open a::after{display:none;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  body.nav-open{overflow:hidden;}
  .related-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:36px;}
}

@media (max-width:768px){
  .page-head{padding:118px 0 40px;}
  .page-head h1{margin:12px 0 16px;}
  .article-wrap{padding:36px 20px 0;}
  .article-body{font-size:16px;}
  .article-body h2{margin:40px 0 14px;}
  .cta-band{margin-top:64px;padding:56px 0;}
  .site-footer{padding:56px 0 0;}
  .mobile-bar{
    display:flex;position:fixed;left:0;right:0;bottom:0;height:64px;z-index:70;
    background:var(--surface);border-top:1px solid var(--line);
    padding:10px 16px;gap:12px;
    box-shadow:0 -8px 24px -18px rgba(22,19,15,.55);
  }
  .mobile-bar .btn{flex:1;height:44px;padding:0 12px;font-size:14px;}
  body{padding-bottom:80px;}
}

@media (max-width:640px){
  .related-grid{grid-template-columns:1fr;gap:16px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .container{padding:0 20px;}
}

@media (max-width:520px){
  .nav-tools .btn{display:none;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .page-head{padding:104px 0 32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important;}
}

/* roulang page: category1 */
:root{
  --brand:#FF5A1F;
  --brand-deep:#C93C0F;
  --accent:#12B5A6;
  --ink:#16130F;
  --ink-soft:#4A423A;
  --paper:#F7F4EF;
  --surface:#FFFFFF;
  --line:rgba(22,19,15,.12);
  --shadow-1:0 1px 2px rgba(22,19,15,.05);
  --shadow-2:0 14px 34px -14px rgba(22,19,15,.22);
  --r-card:14px;
  --r-img:12px;
  --r-btn:10px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-cn:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
}

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

html{
  scroll-behavior:smooth;
  scroll-padding-top:96px;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-soft);
  background:var(--paper);
  padding-bottom:0;
}

h1,h2,h3,h4{
  margin:0;
  color:var(--ink);
  font-family:var(--font-cn);
  letter-spacing:-0.01em;
}

h1{font-size:clamp(30px,4vw,46px);font-weight:900;line-height:1.16;letter-spacing:-0.02em;}
h2{font-size:clamp(26px,3vw,34px);font-weight:800;line-height:1.24;letter-spacing:-0.02em;}
h3{font-size:21px;font-weight:700;line-height:1.4;}
h4{font-size:15px;font-weight:700;line-height:1.5;}
p{margin:0 0 18px;}
p:last-child{margin-bottom:0;}

a{color:var(--ink);text-decoration:none;transition:color .16s var(--ease);}
a:hover{color:var(--brand);}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}

img{max-width:100%;display:block;}
ul,ol{margin:0;padding:0;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  background:rgba(247,244,239,.62);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 2px rgba(22,19,15,.05);
  transition:background .28s var(--ease),box-shadow .28s var(--ease);
}
.site-header.is-scrolled{
  background:var(--surface);
  box-shadow:0 12px 30px -20px rgba(22,19,15,.42);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:76px;
  transition:height .28s var(--ease);
}
.site-header.is-scrolled .nav-inner{height:62px;}

.logo{
  display:inline-flex;
  align-items:center;
  gap:12px;
  color:var(--ink);
  flex:0 0 auto;
}
.logo-mark{display:inline-flex;color:var(--ink);}
.logo-mark svg{display:block;}
.logo-text{display:flex;flex-direction:column;line-height:1.12;}
.logo-text b{font-size:17px;font-weight:900;letter-spacing:-0.02em;color:var(--ink);}
.logo-text span{font-size:11px;letter-spacing:.08em;color:var(--ink-soft);}

.nav-main{display:flex;align-items:center;gap:4px;margin:0 auto;}
.nav-main a{
  position:relative;
  display:inline-block;
  padding:10px 14px;
  font-size:15px;
  font-weight:700;
  color:var(--ink);
  white-space:nowrap;
}
.nav-main a::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:4px;
  height:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .28s var(--ease);
}
.nav-main a:hover{color:var(--brand);}
.nav-main a:hover::after,
.nav-main a.is-active::after{transform:scaleX(1);}
.nav-main a.is-active{color:var(--brand);}

.nav-tools{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-search{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:44px;height:44px;
  border-radius:50%;
  color:var(--ink);
  border:1px solid transparent;
  transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.nav-search:hover{color:var(--brand);background:rgba(255,90,31,.08);border-color:rgba(255,90,31,.22);}
.nav-toggle{
  display:none;
  align-items:center;justify-content:center;
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:10px;
  background:rgba(255,255,255,.6);
  color:var(--ink);
  font-size:17px;
  cursor:pointer;
  transition:background .16s var(--ease),border-color .16s var(--ease);
}
.nav-toggle:hover{border-color:rgba(255,90,31,.4);color:var(--brand);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 28px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:700;
  line-height:1;
  border:1.5px solid transparent;
  cursor:pointer;
  white-space:nowrap;
  transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),transform .28s var(--ease),box-shadow .28s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px -14px rgba(255,90,31,.85);}
.btn-primary:hover,.btn-primary:focus{background:var(--brand-deep);color:#fff;transform:translateY(-2px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover,.btn-ghost:focus{background:var(--ink);color:#fff;transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:999px;
  font-size:13px;
  font-weight:700;
  line-height:1.4;
  background:rgba(255,90,31,.12);
  color:var(--brand-deep);
}
.badge-accent{background:rgba(18,181,166,.14);color:#0A7C72;}
.badge-muted{background:rgba(22,19,15,.07);color:var(--ink-soft);}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--brand);
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  display:inline-block;
  width:8px;height:8px;
  border-radius:2px;
  background:var(--brand);
}

/* ---------- drawer ---------- */
.nav-drawer{
  position:fixed;
  inset:0;
  z-index:200;
  display:flex;
  flex-direction:column;
  padding:24px 24px 28px;
  background:rgba(247,244,239,.94);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  transform:translateY(-100%);
  visibility:hidden;
  transition:transform .36s var(--ease),visibility .36s var(--ease);
}
.nav-drawer.is-open{transform:translateY(0);visibility:visible;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px;}
.drawer-close{
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:10px;
  background:transparent;
  color:var(--ink);
  font-size:18px;
  cursor:pointer;
}
.drawer-close:hover{color:var(--brand);border-color:rgba(255,90,31,.4);}
.drawer-nav{display:flex;flex-direction:column;gap:4px;}
.drawer-nav a{
  padding:16px 4px;
  font-size:18px;
  font-weight:700;
  color:var(--ink);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--brand);}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:14px;}
.drawer-foot .drawer-contact{font-size:13px;color:var(--ink-soft);}
.drawer-foot .drawer-contact strong{display:block;color:var(--ink);font-size:14px;font-weight:700;}
body.is-locked{overflow:hidden;}

/* ---------- breadcrumb & hero ---------- */
.crumb-bar{
  padding:100px 0 0;
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-soft);
  list-style:none;
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb a{color:var(--ink-soft);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:rgba(22,19,15,.28);}
.breadcrumb .current{color:var(--ink);font-weight:700;}

.page-hero{
  position:relative;
  padding:32px 0 76px;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(rgba(247,244,239,.9),rgba(247,244,239,.95)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
}
.page-hero-grid{
  display:grid;
  grid-template-columns:1.35fr .95fr;
  gap:48px;
  align-items:end;
}
.page-hero h1{max-width:620px;}
.page-hero-aside{
  border-left:2px solid var(--brand);
  padding-left:24px;
}
.page-hero-aside p{font-size:16px;color:var(--ink-soft);margin-bottom:22px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- stat strip ---------- */
.stat-strip{
  background:var(--surface);
  border-bottom:1px solid var(--line);
  padding:44px 0;
}
.stat-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.stat-item{display:flex;flex-direction:column;gap:6px;}
.stat-item + .stat-item{border-left:1px solid var(--line);padding-left:24px;}
.stat-num{
  font-size:clamp(36px,4vw,50px);
  font-weight:900;
  line-height:1;
  letter-spacing:-0.03em;
  color:var(--ink);
}
.stat-num em{font-style:normal;color:var(--accent);font-size:.6em;font-weight:800;}
.stat-label{font-size:13px;color:var(--ink-soft);line-height:1.6;}

/* ---------- sections ---------- */
.section{padding:96px 0;}
.section-surface{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:720px;margin-bottom:48px;}
.section-head h2{margin-bottom:14px;}
.section-sub{font-size:16px;color:var(--ink-soft);margin:0;}

/* ---------- split ---------- */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}
.split + .split{margin-top:80px;}
.split-text h2{margin-bottom:18px;}
.split-text p{font-size:16px;}
.split.is-reverse .split-media{order:-1;}
.split-media{
  margin:0;
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease);
}
.split-media img{
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
  transition:transform .56s var(--ease);
}
.split-media:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.split-media:hover img{transform:scale(1.03);}
.split-points{list-style:none;margin:22px 0 0;padding:0;display:flex;flex-direction:column;gap:12px;}
.split-points li{
  position:relative;
  padding-left:24px;
  font-size:15px;
  color:var(--ink-soft);
}
.split-points li::before{
  content:"";
  position:absolute;
  left:0;top:12px;
  width:8px;height:2px;
  background:var(--accent);
}

/* ---------- steps ---------- */
.step-list{
  list-style:none;
  margin:0;
  padding:0;
  border-top:1px solid var(--line);
}
.step-item{
  display:grid;
  grid-template-columns:130px 1fr;
  gap:28px;
  padding:34px 0;
  border-bottom:1px solid var(--line);
  transition:background .28s var(--ease);
}
.step-item:hover{background:rgba(255,90,31,.03);}
.step-num{
  font-size:52px;
  font-weight:900;
  line-height:1;
  letter-spacing:-0.04em;
  color:var(--brand);
}
.step-body h3{margin-bottom:10px;}
.step-body p{max-width:760px;margin:0;font-size:15.5px;}

/* ---------- situation ---------- */
.situation-grid{
  display:grid;
  grid-template-columns:1.25fr 1fr;
  gap:24px;
  align-items:start;
}
.situation-col{display:grid;gap:24px;}
.situation-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px;
  box-shadow:var(--shadow-1);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease);
}
.situation-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.situation-card h3{margin:16px 0 10px;font-size:19px;}
.situation-card p{font-size:15px;margin:0;}
.situation-card-lg{padding:0;overflow:hidden;display:flex;flex-direction:column;}
.situation-card-lg img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  transition:transform .56s var(--ease);
}
.situation-card-lg:hover img{transform:scale(1.03);}
.situation-body{padding:28px;}

/* ---------- faq ---------- */
.faq-list{
  list-style:none;
  margin:0;
  padding:0;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
}
.faq-list .accordion-item{border-bottom:1px solid var(--line);}
.faq-list .accordion-item:last-child{border-bottom:0;}
.faq-list .accordion-title{
  position:relative;
  display:block;
  margin:0;
  padding:24px 68px 24px 28px;
  font-size:17px;
  font-weight:700;
  color:var(--ink);
  background:transparent;
  border:0;
  line-height:1.6;
  transition:color .16s var(--ease);
}
.faq-list .accordion-title:hover{color:var(--brand);}
.faq-list .accordion-title::before{
  content:"+";
  position:absolute;
  right:26px;
  top:50%;
  transform:translateY(-50%);
  font-size:24px;
  font-weight:400;
  line-height:1;
  color:var(--brand);
}
.faq-list .accordion-item.is-active .accordion-title::before{content:"−";}
.faq-list .accordion-item.is-active .accordion-title{color:var(--brand-deep);}
.faq-list .accordion-content{
  padding:0 28px;
  border:0;
  background:transparent;
  color:var(--ink-soft);
  transition:height .28s var(--ease);
}
.faq-list .accordion-content p{font-size:15px;line-height:1.8;margin:0 0 24px;}

/* ---------- next step ---------- */
.next-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:40px;
  box-shadow:var(--shadow-1);
}
.next-inner h2{font-size:24px;margin-bottom:10px;}
.next-inner p{margin:0;font-size:15px;max-width:640px;}

/* ---------- dark cta ---------- */
.cta-dark{
  background:var(--ink);
  color:var(--paper);
  padding:96px 0;
}
.cta-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:36px;
}
.cta-inner h2{color:var(--paper);font-size:clamp(24px,3vw,32px);margin-bottom:12px;}
.cta-inner p{color:rgba(247,244,239,.72);margin:0;font-size:15px;max-width:620px;}

/* ---------- footer ---------- */
.site-footer{
  background:#100E0B;
  color:rgba(247,244,239,.72);
  padding:72px 0 32px;
}
.site-footer h4{
  color:var(--paper);
  font-size:14px;
  letter-spacing:.06em;
  margin-bottom:18px;
}
.site-footer .logo{color:var(--paper);margin-bottom:18px;}
.site-footer .logo-text b{color:var(--paper);}
.site-footer .logo-text span{color:rgba(247,244,239,.55);}
.footer-grid{
  display:grid;
  grid-template-columns:4fr 3fr 3fr 2fr;
  gap:40px;
}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(247,244,239,.62);max-width:320px;}
.footer-links,.footer-contact{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px;}
.footer-links a{color:rgba(247,244,239,.72);font-size:14px;}
.footer-links a:hover{color:var(--brand);}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:rgba(247,244,239,.72);}
.footer-contact i{color:var(--brand);margin-top:4px;}
.footer-bottom{
  margin-top:52px;
  padding-top:24px;
  border-top:1px solid rgba(247,244,239,.12);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.footer-bottom p{margin:0;font-size:13px;color:rgba(247,244,239,.5);}
.to-top{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:40px;
  padding:0 18px;
  border-radius:999px;
  border:1px solid rgba(247,244,239,.24);
  background:transparent;
  color:rgba(247,244,239,.8);
  font-size:13px;
  font-weight:700;
  cursor:pointer;
  transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.to-top:hover{background:var(--brand);border-color:var(--brand);color:#fff;}

/* ---------- mobile bar ---------- */
.mobile-bar{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:110;
  height:64px;
  align-items:center;
  gap:12px;
  padding:0 16px;
  background:var(--surface);
  border-top:1px solid var(--line);
  box-shadow:0 -10px 28px -20px rgba(22,19,15,.4);
}
.mobile-bar .btn{flex:1;}

/* ---------- reveal ---------- */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .56s var(--ease),transform .56s var(--ease);
}
.reveal.is-visible{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .container{padding:0 20px;}
  .nav-main,.nav-search{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-tools{margin-left:auto;}
  .nav-tools .btn-primary{display:none;}
  .section{padding:72px 0;}
  .page-hero-grid{grid-template-columns:1fr;gap:28px;align-items:start;}
  .page-hero-aside{border-left:0;border-top:2px solid var(--brand);padding:22px 0 0;}
  .crumb-bar{padding-top:96px;}
  .split{grid-template-columns:1fr;gap:32px;}
  .split.is-reverse .split-media{order:0;}
  .split + .split{margin-top:64px;}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:28px 20px;}
  .stat-item + .stat-item{border-left:0;padding-left:0;}
  .stat-item:nth-child(even){border-left:1px solid var(--line);padding-left:20px;}
  .situation-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:2fr 1fr;gap:36px;}
}

@media (max-width:768px){
  .section{padding:56px 0;}
  .crumb-bar{padding-top:88px;}
  .page-hero{padding:24px 0 56px;}
  .stat-strip{padding:32px 0;}
  .step-item{grid-template-columns:1fr;gap:12px;padding:28px 0;}
  .step-num{font-size:40px;}
  .next-inner{padding:28px;flex-direction:column;align-items:flex-start;}
  .cta-dark{padding:64px 0;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-inner .btn{width:100%;}
  .next-inner .btn{width:100%;}
  .mobile-bar{display:flex;}
  body{padding-bottom:80px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .faq-list .accordion-title{padding:22px 56px 22px 20px;font-size:16px;}
  .faq-list .accordion-content{padding:0 20px;}
  .faq-list .accordion-title::before{right:20px;}
}

@media (max-width:520px){
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .stat-grid{grid-template-columns:1fr;}
  .stat-item:nth-child(even){border-left:0;padding-left:0;}
  .logo-text span{display:none;}
}

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

/* roulang page: category2 */
:root{
  --brand:#FF5A1F;
  --brand-deep:#C93C0F;
  --accent:#12B5A6;
  --ink:#16130F;
  --ink-soft:#4A423A;
  --paper:#F7F4EF;
  --surface:#FFFFFF;
  --line:rgba(22,19,15,.12);
  --radius-card:14px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-1:0 1px 2px rgba(22,19,15,.05);
  --shadow-2:0 14px 34px -14px rgba(22,19,15,.22);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-cn:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-soft);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--ink);text-decoration:none;transition:color 160ms var(--ease),border-color 160ms var(--ease)}
a:hover{color:var(--brand)}
h1,h2,h3,h4{color:var(--ink);margin:0;letter-spacing:-0.02em}
h1{font-size:clamp(34px,5vw,60px);font-weight:900;line-height:1.12}
h2{font-size:clamp(26px,3.4vw,36px);font-weight:800;line-height:1.24}
h3{font-size:21px;font-weight:700;line-height:1.4}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--surface{background:var(--surface)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--brand);
  text-transform:uppercase;margin-bottom:16px;
}
.eyebrow::before{content:"";width:28px;height:4px;background:var(--brand);border-radius:2px}
.section-head{max-width:760px;margin-bottom:48px}
.section-head p{margin-top:14px;font-size:16px;color:var(--ink-soft)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:700;line-height:1;cursor:pointer;border:1.5px solid transparent;
  transition:background-color 160ms var(--ease),color 160ms var(--ease),transform 280ms var(--ease),border-color 160ms var(--ease),box-shadow 280ms var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn-primary:hover{background:var(--brand-deep);border-color:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;border-color:var(--ink);transform:translateY(-2px)}
.btn-ghost-light{background:transparent;color:var(--paper);border-color:rgba(247,244,239,.5)}
.btn-ghost-light:hover{background:var(--paper);color:var(--ink);border-color:var(--paper)}
.btn-sm{height:42px;padding:0 20px;font-size:14px}
.text-link{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:700;color:var(--ink);
  border-bottom:1px solid var(--accent);padding-bottom:2px;transition:color 160ms var(--ease),border-color 160ms var(--ease);
}
.text-link:hover{color:var(--brand);border-color:var(--brand)}
.text-link i{font-size:12px;transition:transform 280ms var(--ease)}
.text-link:hover i{transform:translateX(4px)}

/* 徽章 */
.badge{
  display:inline-block;font-size:13px;font-weight:700;line-height:1.6;
  padding:4px 12px;border-radius:999px;background:rgba(18,181,166,.12);color:#0B7C71;
}
.badge--brand{background:rgba(255,90,31,.12);color:var(--brand-deep)}

/* 头部导航 */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:200;
  background:rgba(247,244,239,.62);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 2px rgba(22,19,15,.05);
  transition:background-color 280ms var(--ease),box-shadow 280ms var(--ease),height 280ms var(--ease);
}
.site-header.is-scrolled{background:var(--surface);box-shadow:0 10px 30px -18px rgba(22,19,15,.35)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:76px;transition:height 280ms var(--ease)}
.site-header.is-scrolled .nav-inner{height:62px}
.logo{display:flex;align-items:center;gap:12px;color:var(--ink)}
.logo:hover{color:var(--ink)}
.logo-mark{display:inline-flex;color:var(--ink)}
.logo-text{display:flex;flex-direction:column;line-height:1.1}
.logo-text b{font-size:17px;font-weight:900;letter-spacing:-0.02em;color:var(--ink)}
.logo-text span{font-size:11px;letter-spacing:.14em;color:var(--ink-soft);margin-top:2px}
.nav-main{display:flex;align-items:center;gap:34px}
.nav-main a{
  position:relative;font-size:15px;font-weight:600;color:var(--ink);padding:6px 0;
}
.nav-main a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand);
  transition:width 280ms var(--ease);
}
.nav-main a:hover{color:var(--brand)}
.nav-main a:hover::after{width:100%}
.nav-main a.is-active{color:var(--brand)}
.nav-main a.is-active::after{width:100%}
.nav-tools{display:flex;align-items:center;gap:16px}
.nav-search{
  display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;
  border-radius:999px;border:1px solid var(--line);color:var(--ink);font-size:15px;background:rgba(255,255,255,.4);
}
.nav-search:hover{color:var(--brand);border-color:var(--brand)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:transparent;color:var(--ink);font-size:18px;cursor:pointer;
}

/* 面包屑 */
.crumb-bar{padding:112px 0 0}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--ink-soft)}
.crumbs a{color:var(--ink-soft)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:var(--line);font-size:11px}
.crumbs .current{color:var(--ink);font-weight:600}

/* 分类页二：通栏大标题 */
.cat-hero{
  position:relative;overflow:hidden;
  padding:34px 0 84px;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  opacity:.14;z-index:0;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(247,244,239,.4) 0%,rgba(247,244,239,.96) 72%,var(--paper) 100%);
  z-index:0;
}
.cat-hero .container{position:relative;z-index:1}
.cat-hero h1{
  font-size:clamp(34px,5.6vw,56px);
  font-weight:900;
  max-width:960px;
  margin:22px 0 0;
}
.hero-rule{width:60px;height:6px;background:var(--brand);border-radius:3px;margin:28px 0 26px}
.cat-hero .lead{max-width:760px;font-size:17px;line-height:1.85;color:var(--ink-soft)}
.hero-meta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:40px;margin-top:48px;padding-top:32px;border-top:1px solid var(--line);
}
.hero-stats div{min-width:120px}
.hero-stats b{display:block;font-size:38px;font-weight:900;color:var(--ink);letter-spacing:-0.03em;line-height:1.1}
.hero-stats span{font-size:13px;color:var(--ink-soft)}

/* 锚点导航 */
.anchor-nav{
  position:sticky;top:62px;z-index:120;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.anchor-nav ul{display:flex;flex-wrap:nowrap;gap:8px;overflow-x:auto;scrollbar-width:none}
.anchor-nav ul::-webkit-scrollbar{display:none}
.anchor-nav a{
  display:inline-block;white-space:nowrap;padding:16px 4px;margin-right:26px;
  font-size:14px;font-weight:700;color:var(--ink-soft);border-bottom:2px solid transparent;
}
.anchor-nav a:hover{color:var(--brand);border-color:var(--brand)}

/* 要点卡网格 */
.key-grid .cell{margin-bottom:32px}
.key-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:32px;height:100%;box-shadow:var(--shadow-1);
  transition:transform 280ms var(--ease),box-shadow 280ms var(--ease),border-color 280ms var(--ease);
}
.key-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(255,90,31,.35)}
.key-num{
  font-size:15px;font-weight:900;color:var(--brand);letter-spacing:.1em;display:block;margin-bottom:18px;
}
.key-card h3{margin-bottom:12px}
.key-card p{font-size:15px;line-height:1.8;color:var(--ink-soft)}
.key-list{margin-top:18px;border-top:1px dashed var(--line);padding-top:16px}
.key-list li{
  position:relative;padding-left:20px;font-size:14px;color:var(--ink-soft);line-height:1.9;
}
.key-list li::before{
  content:"";position:absolute;left:0;top:12px;width:8px;height:2px;background:var(--accent);border-radius:1px;
}

/* 对比清单 */
.compare{border-top:1px solid var(--line)}
.compare-row{
  display:flex;flex-wrap:wrap;gap:12px 32px;align-items:baseline;
  padding:26px 4px;border-bottom:1px solid var(--line);transition:padding-left 280ms var(--ease),background-color 160ms var(--ease);
}
.compare-row:hover{padding-left:16px;background:rgba(255,90,31,.035)}
.compare-row h3{flex:0 0 200px;font-size:18px;font-weight:700}
.compare-row p{flex:1 1 380px;font-size:15px;color:var(--ink-soft)}
.compare-row .tag{
  flex:0 0 auto;font-size:13px;font-weight:700;color:#0B7C71;background:rgba(18,181,166,.12);
  padding:4px 12px;border-radius:999px;
}

/* 图文区块 */
.split{display:flex;flex-wrap:wrap;align-items:center;gap:56px}
.split > div{flex:1 1 380px}
.split-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-img);
  border:1px solid var(--line);box-shadow:var(--shadow-1);
  transition:transform 280ms var(--ease),box-shadow 280ms var(--ease);
}
.split-media:hover img{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.split-body h2{margin-bottom:16px}
.split-body p{margin-bottom:14px}
.split-body .eyebrow{margin-bottom:12px}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}

/* 节奏时间线 */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:8px}
.tl-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 24px;box-shadow:var(--shadow-1);transition:transform 280ms var(--ease),box-shadow 280ms var(--ease);
}
.tl-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.tl-item b{display:block;font-size:13px;letter-spacing:.1em;color:var(--accent);font-weight:900;margin-bottom:12px}
.tl-item h3{font-size:18px;margin-bottom:10px}
.tl-item p{font-size:14px;line-height:1.8}

/* FAQ */
.faq-wrap{max-width:860px}
.accordion{background:transparent;border:0;margin:0}
.accordion li.accordion-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  margin-bottom:14px;overflow:hidden;box-shadow:var(--shadow-1);
}
.accordion .accordion-title{
  border:0;background:transparent;color:var(--ink);font-size:17px;font-weight:700;
  padding:22px 62px 22px 26px;position:relative;line-height:1.5;
}
.accordion .accordion-title:hover{color:var(--brand);background:transparent}
.accordion .accordion-title::before{
  content:"+" !important;position:absolute;right:26px;top:50%;transform:translateY(-50%);
  font-size:20px;font-weight:400;color:var(--brand);line-height:1;margin:0;
}
.accordion .accordion-item.is-active > .accordion-title::before{content:"−" !important}
.accordion .accordion-content{
  border:0 !important;background:transparent;padding:0 62px 24px 26px;
  color:var(--ink-soft);font-size:15px;line-height:1.85;border-top:0;
}

/* 深底 CTA */
.cta-band{background:var(--ink);color:var(--paper);padding:88px 0;border-radius:0}
.cta-band .cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:32px}
.cta-band h2{color:var(--paper);max-width:560px;font-size:clamp(24px,3vw,32px)}
.cta-band p{color:rgba(247,244,239,.72);font-size:15px;margin-top:14px;max-width:620px}

/* 页脚 */
.site-footer{background:var(--ink);color:rgba(247,244,239,.72);padding:80px 0 0;font-size:14px}
.footer-grid{display:flex;flex-wrap:wrap;gap:48px 32px;padding-bottom:56px}
.footer-grid > div{flex:1 1 200px}
.footer-brand{flex:1 1 300px !important}
.footer-brand .logo{margin-bottom:18px}
.footer-brand .logo-text b{color:var(--paper)}
.footer-brand .logo-text span{color:rgba(247,244,239,.55)}
.footer-brand .logo-mark{color:var(--paper)}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(247,244,239,.66);max-width:340px}
.site-footer h4{color:var(--paper);font-size:15px;font-weight:700;margin-bottom:18px}
.footer-links li{margin-bottom:12px}
.footer-links a{color:rgba(247,244,239,.72);font-size:14px}
.footer-links a:hover{color:var(--brand)}
.footer-contact li{display:flex;align-items:center;gap:10px;margin-bottom:14px;color:rgba(247,244,239,.72)}
.footer-contact i{color:var(--brand);font-size:14px}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  border-top:1px solid rgba(247,244,239,.14);padding:24px 0 28px;
}
.footer-bottom p{font-size:13px;color:rgba(247,244,239,.6)}
.to-top{
  display:inline-flex;align-items:center;gap:8px;height:42px;padding:0 20px;border-radius:999px;
  background:transparent;border:1px solid rgba(247,244,239,.3);color:var(--paper);font-size:13px;cursor:pointer;
  transition:background-color 160ms var(--ease),color 160ms var(--ease),border-color 160ms var(--ease);
}
.to-top:hover{background:var(--brand);border-color:var(--brand);color:#fff}

/* 移动端抽屉 */
.nav-backdrop{
  position:fixed;inset:0;background:rgba(22,19,15,.45);opacity:0;visibility:hidden;
  transition:opacity 280ms var(--ease),visibility 280ms var(--ease);z-index:180;
}
body.nav-open .nav-backdrop{opacity:1;visibility:visible}

/* 入场动画 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 560ms var(--ease),transform 560ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* 响应式 */
@media (max-width:1024px){
  .container{padding:0 20px}
  .section{padding:72px 0}
  .section--tight{padding:56px 0}
  .nav-main{
    position:fixed;top:0;right:0;bottom:0;width:min(360px,86vw);
    flex-direction:column;align-items:flex-start;gap:0;
    background:rgba(247,244,239,.96);
    -webkit-backdrop-filter:blur(14px) saturate(140%);backdrop-filter:blur(14px) saturate(140%);
    border-left:1px solid var(--line);
    padding:96px 28px 32px;transform:translateX(102%);
    transition:transform 280ms var(--ease);z-index:190;overflow-y:auto;
  }
  body.nav-open .nav-main{transform:translateX(0)}
  .nav-main a{width:100%;font-size:18px;font-weight:700;padding:16px 0;border-bottom:1px solid var(--line)}
  .nav-main a::after{display:none}
  .nav-main a.is-active::after{display:block;width:32px}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .nav-search{display:none}
  .crumb-bar{padding-top:96px}
  .anchor-nav{top:62px}
  .timeline{grid-template-columns:repeat(2,1fr)}
  .footer-grid{gap:36px 24px}
}
@media (max-width:768px){
  body{font-size:15px}
  .section{padding:56px 0}
  .section--tight{padding:48px 0}
  .hero-stats{gap:28px;margin-top:36px;padding-top:24px}
  .hero-stats b{font-size:30px}
  .compare-row h3{flex:1 1 100%}
  .compare-row p{flex:1 1 100%}
  .split{gap:32px}
  .cta-band{padding:64px 0}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .logo-text b{font-size:15px}
  .logo-text span{font-size:10px}
  .cat-hero{padding:24px 0 64px}
  .hero-rule{margin:22px 0 20px}
  .timeline{grid-template-columns:1fr}
  .key-card{padding:24px}
  .accordion .accordion-title{padding:20px 56px 20px 20px;font-size:16px}
  .accordion .accordion-content{padding:0 56px 20px 20px}
  .anchor-nav a{margin-right:20px;font-size:13px}
  .footer-grid > div{flex:1 1 100%}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}