/* roulang page: index */
:root{
  --ink:#101418;
  --accent:#C25A2C;
  --accent-soft:rgba(194,90,44,.10);
  --stone:#3C5A63;
  --paper:#FBFAF7;
  --sub:#F3F1EC;
  --line:#E9E5DE;
  --line-2:#E3DFD7;
  --text:#3A4148;
  --muted:#6B7480;
  --inv:#9AA3A8;
  --ok:#2F7A55;
  --err:#B4341F;
  --r-card:12px;
  --r-sm:8px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,20,24,.05);
  --sh-2:0 10px 26px -14px rgba(16,20,24,.22);
  --sh-3:0 18px 40px -20px rgba(16,20,24,.30);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
  --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC",Georgia,serif;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",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(--text);font-family:var(--font-sans);font-size:16.5px;line-height:1.8;font-variant-numeric:tabular-nums;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--ink);margin:0;line-height:1.25;letter-spacing:-.02em}
h1{font-size:clamp(30px,4.4vw,54px);line-height:1.12}
h2{font-size:clamp(24px,2.9vw,38px)}
h3{font-size:20px;line-height:1.4}
p{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:112px 0}
.section-tight{padding:80px 0}
.section-alt{background:var(--sub);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .25s var(--ease)}
.site-header.is-scrolled{box-shadow:var(--sh-2)}
.nav{display:flex;align-items:center;gap:32px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand svg{width:30px;height:30px;flex:0 0 auto}
.brand-name{font-family:var(--font-serif);font-size:18px;font-weight:600;letter-spacing:.02em;color:var(--ink);white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:8px}
.nav-links a{position:relative;display:inline-block;padding:8px 12px;font-size:15px;color:var(--text);transition:color .2s var(--ease)}
.nav-links a::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .25s var(--ease)}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after,.nav-links a.is-active::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--ink)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.search{position:relative;display:flex;align-items:center}
.search svg{position:absolute;left:14px;width:16px;height:16px;stroke:var(--muted);fill:none;stroke-width:1.6;stroke-linecap:round}
.search input{width:200px;height:38px;padding:0 14px 0 38px;border:1px solid transparent;background:var(--sub);border-radius:var(--r-pill);font-size:14px;transition:all .2s var(--ease)}
.search input::placeholder{color:var(--muted)}
.search input:focus{outline:none;background:#fff;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.nav-burger{display:none;width:44px;height:44px;align-items:center;justify-content:center;border-radius:var(--r-sm)}
.nav-burger svg{width:22px;height:22px;stroke:var(--ink);stroke-width:1.6;fill:none;stroke-linecap:round}

/* ---------- drawer ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(16,20,24,.42);opacity:0;pointer-events:none;transition:opacity .25s var(--ease);z-index:90}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);background:#fff;z-index:100;transform:translateX(102%);transition:transform .3s var(--ease);display:flex;flex-direction:column;padding:22px 20px;overflow-y:auto}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-close{width:40px;height:40px;border-radius:var(--r-sm);display:flex;align-items:center;justify-content:center}
.drawer-close svg{width:20px;height:20px;stroke:var(--ink);stroke-width:1.7;fill:none;stroke-linecap:round}
.drawer-nav{display:flex;flex-direction:column;gap:2px;margin-bottom:20px}
.drawer-nav a{padding:13px 4px;font-size:16px;border-bottom:1px solid var(--line);color:var(--text)}
.drawer-nav a:hover{color:var(--accent)}
.drawer .btn{width:100%;justify-content:center}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:var(--r-pill);font-size:15px;font-weight:500;border:1px solid transparent;transition:all .2s var(--ease);white-space:nowrap}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:var(--accent);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{background:transparent;border-color:var(--line-2);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink);color:var(--ink);transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;color:var(--ink);font-weight:500}
.link-arrow span{transition:transform .2s var(--ease)}
.link-arrow:hover{color:var(--accent)}
.link-arrow:hover span{transform:translateX(4px)}

/* ---------- hero ---------- */
.hero{padding:84px 0 96px;background:
  linear-gradient(180deg,rgba(251,250,247,0) 0%,rgba(251,250,247,.9) 78%,var(--paper) 100%),
  repeating-linear-gradient(90deg,rgba(16,20,24,.035) 0 1px,transparent 1px 68px),
  var(--paper);
  border-bottom:1px solid var(--line)}
.hero-inner{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.06fr);gap:64px;align-items:center}
.hero-kicker{display:inline-block;font-size:13px;letter-spacing:.12em;color:var(--stone);background:rgba(60,90,99,.09);padding:6px 14px;border-radius:var(--r-pill);margin-bottom:22px}
.hero h1{max-width:560px;margin-bottom:20px}
.hero-sub{max-width:520px;font-size:17px;color:var(--muted);line-height:1.75}
.hero-actions{display:flex;align-items:center;gap:22px;flex-wrap:wrap;margin:32px 0 44px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);padding-top:26px}
.stats li{padding-left:20px;border-left:1px solid var(--line)}
.stats li:first-child{padding-left:0;border-left:0}
.stats strong{display:block;font-family:var(--font-serif);font-size:26px;color:var(--ink);line-height:1.2}
.stats span{font-size:13px;color:var(--muted)}
.hero-media{margin:0;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-3);aspect-ratio:16/10;border:1px solid var(--line-2)}
.hero-media img{width:100%;height:100%;object-fit:cover}

/* ---------- section head ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:48px;flex-wrap:wrap}
.sec-head p{max-width:620px;color:var(--muted);margin-top:14px}
.eyebrow{font-size:13px;letter-spacing:.12em;color:var(--accent);display:block;margin-bottom:12px}

/* ---------- value list ---------- */
.value-list{border-top:1px solid var(--line)}
.value-item{display:grid;grid-template-columns:88px minmax(0,1fr) minmax(0,1.25fr);gap:32px;padding:34px 0;border-bottom:1px solid var(--line);align-items:start}
.value-item .num{font-family:var(--font-serif);font-size:22px;color:var(--accent);letter-spacing:.02em}
.value-item h3{margin-bottom:0}
.value-item p{color:var(--muted);font-size:15.5px;line-height:1.8}

/* ---------- bento ---------- */
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:32px;transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease)}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D6D0C6}
.bento .card-lg{grid-column:span 4}
.bento .card-sm{grid-column:span 2}
.bento .card-wide{grid-column:span 3}
.card-ico{width:40px;height:40px;border-radius:var(--r-sm);background:rgba(60,90,99,.10);display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.card-ico svg{width:22px;height:22px;stroke:var(--stone);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.card h3{margin-bottom:14px}
.card p{color:var(--muted);font-size:15px;line-height:1.8}
.card ul{margin-top:16px;display:flex;flex-direction:column;gap:9px}
.card ul li{position:relative;padding-left:18px;font-size:14.5px;color:var(--text)}
.card ul li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:2px;background:var(--accent)}

/* ---------- scenario tabs ---------- */
.tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:36px}
.tab-btn{padding:10px 20px;border-radius:var(--r-pill);border:1px solid var(--line-2);background:#fff;font-size:14.5px;color:var(--text);transition:all .2s var(--ease)}
.tab-btn:hover{border-color:var(--ink)}
.tab-btn.is-active{background:var(--ink);border-color:var(--ink);color:#fff}
.tab-pane{display:none}
.tab-pane.is-active{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:56px;align-items:center;animation:fadeUp .3s var(--ease)}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.tab-pane figure{margin:0;border-radius:var(--r-card);overflow:hidden;aspect-ratio:16/11;border:1px solid var(--line-2)}
.tab-pane figure img{width:100%;height:100%;object-fit:cover}
.tab-pane h3{font-size:24px;margin-bottom:14px}
.tab-pane>div>p{color:var(--muted);margin-bottom:22px}
.tick-list{display:flex;flex-direction:column;gap:14px}
.tick-list li{display:flex;gap:12px;font-size:15.5px}
.tick-list svg{width:20px;height:20px;flex:0 0 auto;margin-top:5px;stroke:var(--accent);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ---------- cases ---------- */
.case{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:center;padding:52px 0;border-bottom:1px solid var(--line)}
.case:last-child{border-bottom:0}
.case-media{margin:0;border-radius:var(--r-card);overflow:hidden;aspect-ratio:4/3;border:1px solid var(--line-2)}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.case:hover .case-media img{transform:scale(1.03)}
.case.reverse .case-media{order:2}
.case-body .badge{margin-bottom:16px}
.case-body h3{font-size:23px;margin-bottom:14px}
.case-body p{color:var(--muted);font-size:15.5px}
.case-metric{margin-top:22px;font-family:var(--font-serif);font-size:30px;color:var(--ink)}
.case-metric small{font-family:var(--font-sans);font-size:13px;color:var(--muted);margin-left:10px;letter-spacing:.06em}

/* ---------- badge ---------- */
.badge{display:inline-block;font-size:12px;letter-spacing:.12em;padding:5px 11px;border-radius:4px;background:rgba(60,90,99,.10);color:var(--stone)}
.badge-accent{background:var(--accent-soft);color:var(--accent)}

/* ---------- plans ---------- */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.plan{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:36px 30px;display:flex;flex-direction:column;transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.plan:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.plan.featured{border-color:var(--accent);box-shadow:var(--sh-2)}
.plan.featured::before{content:"常用档位";position:absolute;top:-13px;left:30px;background:var(--accent);color:#fff;font-size:12px;letter-spacing:.1em;padding:4px 12px;border-radius:var(--r-pill)}
.plan h3{font-size:22px;margin-bottom:8px}
.plan .plan-for{font-size:13.5px;color:var(--muted);margin-bottom:24px}
.plan .price{font-family:var(--font-serif);font-size:34px;color:var(--ink);line-height:1.1}
.plan .price small{font-family:var(--font-sans);font-size:13.5px;color:var(--muted);margin-left:8px}
.plan ul{margin:26px 0 30px;display:flex;flex-direction:column;gap:12px;flex:1}
.plan ul li{position:relative;padding-left:22px;font-size:14.5px;color:var(--text)}
.plan ul li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:2px;background:var(--accent);border-radius:2px}
.plan .btn{width:100%;justify-content:center}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease)}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D6D0C6}
.news-thumb{position:relative;aspect-ratio:3/2;overflow:hidden;background:var(--sub)}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-thumb .badge{position:absolute;top:12px;left:12px;background:#fff;color:var(--stone)}
.news-body{padding:22px;display:flex;flex-direction:column;flex:1}
.news-body h3{font-size:17.5px;line-height:1.45;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body p{font-size:13.5px;color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1}
.news-meta{margin-top:18px;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--inv)}
.empty-state{grid-column:1/-1;text-align:center;padding:64px 24px;border:1px dashed var(--line-2);border-radius:var(--r-card);background:#fff}
.empty-state svg{width:44px;height:44px;margin:0 auto 18px;stroke:var(--muted);fill:none;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round}
.empty-state p{color:var(--muted);margin-bottom:20px}

/* ---------- faq ---------- */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;text-align:left;padding:22px 0;font-size:17px;font-weight:600;color:var(--ink);font-family:var(--font-sans)}
.faq-q .plus{position:relative;width:24px;height:24px;flex:0 0 auto;border:1px solid var(--accent);border-radius:50%;transition:transform .22s var(--ease)}
.faq-q .plus::before,.faq-q .plus::after{content:"";position:absolute;background:var(--accent);border-radius:2px}
.faq-q .plus::before{left:6px;right:6px;top:11px;height:1.5px}
.faq-q .plus::after{top:6px;bottom:6px;left:11px;width:1.5px}
.faq-item.is-open .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s var(--ease)}
.faq-a p{padding:0 0 24px;font-size:15.5px;line-height:1.85;color:var(--muted)}
.faq-item.is-open .faq-a{max-height:340px}

/* ---------- cta band ---------- */
.cta-band{background:var(--sub);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:88px 0;text-align:center}
.cta-band h2{margin-bottom:14px}
.cta-band p{color:var(--muted);max-width:560px;margin:0 auto 32px}
.cta-actions{display:flex;justify-content:center;gap:18px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--inv);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:48px;padding-bottom:56px}
.footer-brand .brand-name{color:#fff}
.footer-brand p{margin-top:18px;font-size:14px;line-height:1.8;color:var(--inv);max-width:280px}
.footer-col h4{font-family:var(--font-sans);font-size:13px;letter-spacing:.12em;color:var(--inv);font-weight:500;margin-bottom:20px}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a,.footer-col li{font-size:14px;color:#C9CFD2;transition:color .2s var(--ease),transform .2s var(--ease)}
.footer-col a:hover{color:#fff;transform:translateX(2px);display:inline-block}
.footer-bottom{border-top:1px solid #2A3136;padding:24px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--inv)}

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

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .hero-inner{gap:44px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:36px}
}
@media (max-width:1023px){
  .section{padding:80px 0}
  .section-tight{padding:64px 0}
  .nav-links,.nav-right .search{display:none}
  .nav-burger{display:flex}
  .nav{gap:16px}
  .hero{padding:56px 0 68px}
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-media{order:2}
  .stats{grid-template-columns:repeat(2,1fr);gap:22px 0;padding-top:24px}
  .stats li:nth-child(3){padding-left:0;border-left:0}
  .stats li:nth-child(3),.stats li:nth-child(4){padding-top:20px;border-top:1px solid var(--line)}
  .value-item{grid-template-columns:64px minmax(0,1fr);gap:20px}
  .value-item p{grid-column:2}
  .bento{grid-template-columns:repeat(2,1fr)}
  .bento .card-lg,.bento .card-sm,.bento .card-wide{grid-column:span 2}
  .tab-pane.is-active{grid-template-columns:1fr;gap:32px}
  .case{grid-template-columns:1fr;gap:28px;padding:44px 0}
  .case.reverse .case-media{order:0}
  .plans{grid-template-columns:1fr;gap:20px}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 18px}
  .section{padding:64px 0}
  .section-tight{padding:52px 0}
  .nav{height:56px}
  .brand svg{width:26px;height:26px}
  .brand-name{font-size:16.5px}
  .hero{padding:40px 0 52px}
  .hero-actions{gap:16px;margin:26px 0 34px}
  .hero-actions .btn{flex:1 1 auto;justify-content:center}
  .stats strong{font-size:22px}
  .sec-head{margin-bottom:32px}
  .value-item{grid-template-columns:1fr;gap:10px;padding:26px 0}
  .value-item p{grid-column:1}
  .bento{grid-template-columns:1fr}
  .bento .card-lg,.bento .card-sm,.bento .card-wide{grid-column:span 1}
  .card{padding:24px}
  .news-grid{grid-template-columns:1fr}
  .faq-q{font-size:15.5px;padding:18px 0}
  .cta-band{padding:64px 0}
  .cta-actions .btn{width:100%}
  .site-footer{padding:56px 0 0}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:40px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .drawer .btn{height:48px}
}
@media (max-width:480px){
  h1{font-size:29px}
  h2{font-size:23px}
  .tab-btn{padding:9px 15px;font-size:13.5px}
  .plan{padding:28px 22px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --ink:#101418;
  --accent:#C25A2C;
  --accent-soft:rgba(194,90,44,.08);
  --slate:#3C5A63;
  --bg:#FBFAF7;
  --bg-2:#F3F1EC;
  --line:#E9E5DE;
  --line-2:#E3DFD7;
  --text:#3A4148;
  --muted:#6B7480;
  --inv-muted:#9AA3A8;
  --success:#2F7A55;
  --error:#B4341F;
  --radius:12px;
  --radius-badge:4px;
  --pill:999px;
  --shadow-1:0 1px 2px rgba(16,20,24,.05);
  --shadow-2:0 12px 28px -14px rgba(16,20,24,.20);
  --shadow-3:0 20px 46px -22px rgba(16,20,24,.28);
  --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC",Georgia,serif;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.8;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--ink);letter-spacing:-.02em;margin:0;font-weight:600}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
input{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
::selection{background:var(--accent);color:#fff}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-tight{padding:64px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-head h2{font-size:36px;line-height:1.25}
.section-head p{color:var(--muted);font-size:15.5px;max-width:560px;margin-top:10px}
.eyebrow{font-size:12px;letter-spacing:.12em;color:var(--accent);text-transform:uppercase;font-weight:600}
.link-arrow{display:inline-flex;align-items:center;gap:8px;color:var(--ink);font-size:15px;font-weight:600;border-bottom:0}
.link-arrow svg{width:16px;height:16px;stroke:var(--accent);stroke-width:1.6;fill:none;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s var(--ease)}
.link-arrow:hover svg{transform:translateX(4px)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--pill);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:var(--accent);transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-ghost{background:transparent;color:var(--ink);border-color:#D6D0C6}
.btn-ghost:hover{border-color:var(--ink);color:var(--ink);background:#fff}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 20px -14px rgba(16,20,24,.28)}
.nav{display:flex;align-items:center;gap:32px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand svg{width:30px;height:30px;stroke:var(--ink);stroke-width:1.6;fill:none;stroke-linecap:round;stroke-linejoin:round}
.brand-name{font-family:var(--font-serif);font-size:18px;font-weight:600;letter-spacing:.02em;color:var(--ink)}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:8px}
.nav-links a{position:relative;font-size:15px;color:var(--text);padding:6px 0;transition:color .2s var(--ease)}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .25s var(--ease);
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after,.nav-links a.is-active::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--ink);font-weight:600}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto}
.search{
  display:flex;align-items:center;gap:8px;height:38px;width:210px;
  padding:0 16px;border-radius:var(--pill);background:var(--bg-2);
  border:1px solid transparent;transition:background-color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search svg{width:16px;height:16px;stroke:var(--muted);stroke-width:1.6;fill:none;stroke-linecap:round;flex:0 0 16px}
.search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px;color:var(--text)}
.search input::placeholder{color:var(--muted)}
.search:focus-within{background:#fff;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.nav-burger{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--line);border-radius:10px;cursor:pointer;
}
.nav-burger svg{width:20px;height:20px;stroke:var(--ink);stroke-width:1.6;fill:none;stroke-linecap:round}

/* ---------- page hero ---------- */
.page-hero{
  background:var(--bg-2);
  background-image:linear-gradient(rgba(16,20,24,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(16,20,24,.035) 1px,transparent 1px);
  background-size:48px 48px;
  border-bottom:1px solid var(--line);
  padding:40px 0 52px;
}
.crumbs{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:var(--muted);margin-bottom:26px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--accent)}
.crumbs span.sep{color:#C7C1B7}
.crumbs .current{color:var(--text);max-width:420px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;
  border-radius:var(--radius-badge);font-size:12.5px;font-weight:600;letter-spacing:.04em;
  background:rgba(60,90,99,.10);color:var(--slate);
}
.page-hero h1{font-size:46px;line-height:1.16;max-width:900px;margin:16px 0 18px}
.post-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.post-meta .dot{width:3px;height:3px;border-radius:50%;background:#C7C1B7}

/* ---------- article layout ---------- */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start;padding:72px 0 8px}
.post-body{min-width:0}
.prose{max-width:760px;font-size:18px;line-height:1.9;color:var(--text)}
.prose > *:first-child{margin-top:0}
.prose p{margin:0 0 1.4em}
.prose h2{
  font-size:28px;line-height:1.35;margin:2.2em 0 .8em;
  padding-left:14px;border-left:3px solid var(--accent);
}
.prose h3{font-size:21px;line-height:1.45;margin:1.9em 0 .7em}
.prose h4{font-size:18px;margin:1.6em 0 .6em}
.prose ul,.prose ol{margin:0 0 1.4em;padding-left:1.4em}
.prose ul li{position:relative;margin-bottom:.6em;padding-left:.2em}
.prose ol{list-style:decimal}
.prose ol li{margin-bottom:.6em}
.prose ul li::marker{color:var(--accent)}
.prose blockquote{
  margin:0 0 1.6em;padding:18px 24px;background:var(--bg-2);
  border-left:3px solid var(--accent);border-radius:0 var(--radius) var(--radius) 0;color:#4B5259;
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{border-radius:var(--radius);margin:1.6em 0;height:auto}
.prose figure{margin:1.6em 0}
.prose figcaption{font-size:12.5px;color:var(--muted);text-align:center;margin-top:10px}
.prose a{color:var(--accent);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.prose a:hover{text-decoration-thickness:2px}
.prose code{background:var(--bg-2);border:1px solid var(--line);border-radius:6px;padding:2px 6px;font-size:15px}
.prose table{width:100%;border-collapse:collapse;margin:0 0 1.6em;font-size:15.5px}
.prose th,.prose td{border-bottom:1px solid var(--line-2);padding:12px 14px;text-align:left}
.prose th{background:var(--bg-2);font-weight:600;color:var(--ink)}
.prose hr{border:0;border-top:1px solid var(--line-2);margin:2.4em 0}

.empty-state{
  border:1px dashed var(--line-2);border-radius:var(--radius);background:#fff;
  padding:56px 32px;text-align:center;
}
.empty-state svg{width:44px;height:44px;stroke:var(--slate);stroke-width:1.6;fill:none;stroke-linecap:round;stroke-linejoin:round;margin:0 auto 16px}
.empty-state h2{font-size:22px;margin-bottom:10px}
.empty-state p{color:var(--muted);font-size:15.5px;margin-bottom:22px}
.empty-state .btn{margin:0 auto}

.post-foot{max-width:760px;margin-top:44px}
.tag-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding-top:26px;border-top:1px solid var(--line-2)}
.tag-row .label{font-size:13px;color:var(--muted);letter-spacing:.12em}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 12px;border-radius:var(--radius-badge);
  background:var(--bg-2);color:var(--slate);font-size:13.5px;transition:background-color .2s var(--ease),color .2s var(--ease);
}
.tag:hover{background:rgba(60,90,99,.14);color:var(--ink)}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:32px}
.pager a{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 22px;transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.pager a:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#D6D0C6}
.pager .dir{font-size:12.5px;color:var(--muted);letter-spacing:.1em}
.pager strong{display:block;font-family:var(--font-serif);font-size:16.5px;color:var(--ink);margin-top:8px;line-height:1.5}
.pager .next{text-align:right}
.pager .next strong{color:var(--ink)}

/* ---------- sidebar ---------- */
.sidebar{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.side-card h3{font-size:16px;margin-bottom:14px;letter-spacing:0}
.side-card p{font-size:14.5px;color:var(--muted);line-height:1.75}
.toc ol{counter-reset:toc;display:flex;flex-direction:column;gap:10px}
.toc a{font-size:14.5px;color:var(--text);display:block;line-height:1.6;transition:color .2s var(--ease),padding-left .2s var(--ease)}
.toc a:hover{color:var(--accent);padding-left:4px}
.rec-item{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}
.rec-item:last-child{border-bottom:0;padding-bottom:0}
.rec-item:first-of-type{padding-top:0}
.rec-item img{width:72px;height:54px;object-fit:cover;border-radius:8px;flex:0 0 72px}
.rec-item strong{display:block;font-size:14.5px;color:var(--ink);font-weight:600;line-height:1.5;font-family:var(--font-sans)}
.rec-item span{font-size:12.5px;color:var(--muted)}
.rec-item:hover strong{color:var(--accent)}
.side-cta{background:var(--ink);border-color:var(--ink)}
.side-cta h3{color:#fff}
.side-cta p{color:var(--inv-muted)}
.side-cta .btn{margin-top:16px;width:100%;background:#fff;color:var(--ink)}
.side-cta .btn:hover{background:var(--accent);color:#fff}
.cloud-tags{display:flex;flex-wrap:wrap;gap:8px}

/* ---------- related ---------- */
.related{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#D6D0C6}
.card-media{position:relative;aspect-ratio:3/2;overflow:hidden;background:var(--bg-2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-media .badge{position:absolute;left:12px;top:12px;background:#fff;color:var(--slate)}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:19px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body p{font-size:13.5px;color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{margin-top:auto;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);padding-top:12px;border-top:1px solid var(--line)}

/* ---------- CTA band ---------- */
.cta-band{background:var(--ink);color:#fff;text-align:center;padding:88px 0}
.cta-band h2{color:#fff;font-size:36px;line-height:1.3;max-width:720px;margin:0 auto 16px}
.cta-band p{color:var(--inv-muted);font-size:16px;max-width:620px;margin:0 auto 30px}
.cta-band .btn-primary{background:#fff;color:var(--ink)}
.cta-band .btn-primary:hover{background:var(--accent);color:#fff}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#C9D0D4;padding:72px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand .brand-name{color:#fff;display:inline-block;margin-bottom:14px}
.footer-brand p{font-size:14.5px;line-height:1.8;color:var(--inv-muted);max-width:300px}
.footer-col h4{color:var(--inv-muted);font-size:13px;letter-spacing:.12em;font-weight:600;margin-bottom:16px;font-family:var(--font-sans)}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col li,.footer-col a{font-size:14px;color:#C9D0D4;transition:color .2s var(--ease),transform .2s var(--ease)}
.footer-col a{display:inline-block}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-bottom{
  border-top:1px solid #2A3136;padding-top:24px;display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:13px;color:var(--inv-muted);
}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .page-hero h1{font-size:40px}
}
@media (max-width:1023px){
  .nav{height:56px;gap:16px}
  .nav-burger{display:inline-flex}
  .search{display:none}
  .nav-links{
    position:absolute;left:0;right:0;top:100%;margin:0;
    flex-direction:column;align-items:flex-start;gap:4px;
    background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow-2);
    padding:12px 24px 20px;display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{width:100%;padding:12px 0;font-size:15.5px}
  .nav-links a::after{display:none}
  .layout{grid-template-columns:1fr;gap:40px;padding-top:56px}
  .sidebar{position:static}
  .prose{max-width:none}
  .post-foot{max-width:none}
  .section{padding:72px 0}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 16px}
  .page-hero{padding:28px 0 36px}
  .page-hero h1{font-size:31px}
  .section-head h2{font-size:26px}
  .section{padding:56px 0}
  .prose{font-size:17px;line-height:1.85}
  .prose h2{font-size:23px}
  .prose h3{font-size:19px}
  .card-grid{grid-template-columns:1fr}
  .pager{grid-template-columns:1fr}
  .pager .next{text-align:left}
  .cta-band{padding:64px 0}
  .cta-band h2{font-size:26px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .crumbs .current{max-width:180px}
}
@media (max-width:480px){
  .page-hero h1{font-size:27px}
  .nav-right{gap:8px}
  .btn-sm{padding:0 14px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: category1 */
:root{
  --ink:#101418;
  --ink-soft:#2A3136;
  --accent:#C25A2C;
  --accent-dark:#A5471F;
  --stone:#3C5A63;
  --bg:#FBFAF7;
  --bg-alt:#F3F1EC;
  --line:#E9E5DE;
  --line-strong:#DCD7CE;
  --text:#3A4148;
  --muted:#6B7480;
  --muted-light:#9AA3A8;
  --success:#2F7A55;
  --danger:#B4341F;
  --radius-sm:4px;
  --radius:12px;
  --radius-btn:999px;
  --shadow-1:0 1px 2px rgba(16,20,24,.05);
  --shadow-2:0 6px 20px rgba(16,20,24,.08);
  --shadow-3:0 12px 32px rgba(16,20,24,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC",serif;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.8;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
svg{width:100%;height:100%;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:2px;}

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

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--radius-btn);
  padding:13px 26px;font-size:15px;font-weight:600;line-height:1;
  cursor:pointer;transition:all .2s var(--ease);white-space:nowrap;
}
.btn-primary{background:var(--ink);color:#fff;}
.btn-primary:hover{background:var(--accent);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--ink);}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px);}
.btn-sm{padding:9px 18px;font-size:14px;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--ink);font-size:15px;font-weight:600;
  border-bottom:1px solid var(--line-strong);padding-bottom:2px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.link-arrow svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s var(--ease);}
.link-arrow:hover{color:var(--accent);border-color:var(--accent);}
.link-arrow:hover svg{transform:translateX(4px);}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 4px 18px rgba(16,20,24,.07);}
.nav{display:flex;align-items:center;gap:28px;height:68px;}
.brand{display:flex;align-items:center;gap:9px;flex-shrink:0;}
.brand svg{width:30px;height:30px;flex-shrink:0;}
.brand-name{font-family:var(--font-serif);font-size:18px;font-weight:600;letter-spacing:.02em;color:var(--ink);}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:8px;}
.nav-links a{
  position:relative;font-size:15px;color:var(--text);padding:6px 0;
  transition:color .2s var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--accent);transition:width .22s var(--ease);
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after,.nav-links a.is-active::after{width:100%;}
.nav-links a.is-active{color:var(--ink);font-weight:600;}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto;}
.search{position:relative;display:flex;align-items:center;}
.search svg{
  position:absolute;left:14px;width:16px;height:16px;
  fill:none;stroke:var(--muted);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;
}
.search input{
  width:200px;height:38px;border:none;outline:none;
  background:var(--bg-alt);border-radius:var(--radius-btn);
  padding:0 18px 0 40px;font-size:14px;color:var(--ink);
  transition:background .2s var(--ease),box-shadow .2s var(--ease);
}
.search input::placeholder{color:var(--muted-light);}
.search input:focus{background:#fff;box-shadow:0 0 0 1px var(--accent),0 0 0 4px rgba(194,90,44,.1);}
.nav-burger{display:none;width:40px;height:40px;border:1px solid var(--line-strong);background:#fff;border-radius:10px;padding:8px;cursor:pointer;}
.nav-burger svg{fill:none;stroke:var(--ink);stroke-width:1.6;stroke-linecap:round;}

.drawer{
  position:fixed;inset:0 0 0 auto;width:min(340px,86vw);z-index:80;
  background:#fff;box-shadow:-12px 0 40px rgba(16,20,24,.14);
  transform:translateX(102%);transition:transform .3s var(--ease);
  display:flex;flex-direction:column;padding:22px 24px 0;
}
.drawer.is-open{transform:translateX(0);}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
.drawer-close{width:36px;height:36px;border:1px solid var(--line-strong);background:#fff;border-radius:10px;padding:8px;cursor:pointer;}
.drawer-close svg{fill:none;stroke:var(--ink);stroke-width:1.6;stroke-linecap:round;}
.drawer-links{display:flex;flex-direction:column;}
.drawer-links a{padding:14px 0;font-size:16px;border-bottom:1px solid var(--line);color:var(--ink);}
.drawer-links a.is-active{color:var(--accent);font-weight:600;}
.drawer-search{position:relative;display:flex;align-items:center;margin:20px 0 8px;}
.drawer-search svg{position:absolute;left:14px;width:16px;height:16px;fill:none;stroke:var(--muted);stroke-width:1.6;stroke-linecap:round;}
.drawer-search input{width:100%;height:44px;border:1px solid var(--line-strong);border-radius:var(--radius-btn);padding:0 18px 0 40px;outline:none;background:#fff;font-size:14px;}
.drawer-foot{margin-top:auto;padding:18px 0 24px;border-top:1px solid var(--line);}
.drawer-foot .btn{width:100%;}
.scrim{position:fixed;inset:0;background:rgba(16,20,24,.42);z-index:70;opacity:0;visibility:hidden;transition:opacity .3s var(--ease);}
.scrim.is-open{opacity:1;visibility:visible;}

/* ---------- hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;
  background:var(--bg-alt);
  border-bottom:1px solid var(--line);
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center right;
  opacity:.14;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(90deg,rgba(251,250,247,.94) 0%,rgba(251,250,247,.86) 52%,rgba(251,250,247,.42) 100%);
}
.cat-hero .container{position:relative;z-index:2;padding-top:38px;padding-bottom:56px;}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:22px;flex-wrap:wrap;}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb span.sep{color:var(--muted-light);}
.breadcrumb .current{color:var(--ink);}
.cat-hero h1{
  font-family:var(--font-serif);
  font-size:clamp(30px,4.4vw,54px);
  line-height:1.16;letter-spacing:-.02em;font-weight:600;color:var(--ink);
  max-width:760px;
}
.cat-hero .hero-sub{
  margin-top:20px;max-width:620px;font-size:17px;color:var(--muted);line-height:1.85;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.tag{
  display:inline-flex;align-items:center;
  font-size:13px;letter-spacing:.06em;color:var(--stone);
  background:rgba(60,90,99,.08);border:1px solid rgba(60,90,99,.16);
  border-radius:var(--radius-sm);padding:5px 11px;
}
.hero-actions{margin-top:30px;display:flex;align-items:center;gap:22px;flex-wrap:wrap;}
.hero-facts{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  margin-top:44px;border-top:1px solid var(--line-strong);padding-top:24px;
  max-width:900px;
}
.hero-facts div{padding-right:20px;}
.hero-facts div + div{border-left:1px solid var(--line-strong);padding-left:20px;}
.hero-facts strong{display:block;font-family:var(--font-serif);font-size:26px;color:var(--ink);line-height:1.4;}
.hero-facts span{font-size:13px;color:var(--muted);}

/* ---------- layout ---------- */
.cat-body{padding:88px 0 0;}
.cat-grid{display:grid;grid-template-columns:236px 1fr;gap:56px;align-items:start;}
.toc{position:sticky;top:96px;border-left:2px solid var(--line);padding-left:20px;}
.toc h2{
  font-family:var(--font-sans);font-size:13px;font-weight:600;letter-spacing:.12em;
  color:var(--muted-light);text-transform:uppercase;margin-bottom:16px;
}
.toc a{
  display:block;font-size:14.5px;color:var(--muted);padding:8px 0;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.toc a:hover{color:var(--ink);transform:translateX(3px);}
.toc a.is-current{color:var(--accent);font-weight:600;}
.toc-note{
  margin-top:26px;padding:16px;background:var(--bg-alt);border-radius:var(--radius);
  font-size:13.5px;line-height:1.8;color:var(--muted);
}
.toc-note a{display:inline-block;margin-top:8px;color:var(--accent);font-weight:600;}

.main-flow{max-width:800px;}
.block{padding-bottom:72px;scroll-margin-top:96px;}
.block:last-child{padding-bottom:0;}
.block-label{
  display:inline-block;font-size:13px;letter-spacing:.12em;color:var(--accent);
  font-weight:600;margin-bottom:14px;
}
.block h2{
  font-family:var(--font-serif);font-size:clamp(24px,3vw,34px);line-height:1.3;
  letter-spacing:-.02em;color:var(--ink);font-weight:600;margin-bottom:20px;
}
.block h3{
  font-family:var(--font-sans);font-size:19px;font-weight:600;color:var(--ink);
  margin:30px 0 10px;line-height:1.5;
}
.block p{color:var(--text);margin-bottom:18px;}
.block p.lead{font-size:17.5px;color:#2E353B;}
.split{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center;margin:32px 0;}
.split figure{margin:0;border-radius:var(--radius);overflow:hidden;background:var(--bg-alt);}
.split figure img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.split figcaption{font-size:12.5px;color:var(--muted);padding:10px 2px 0;}
.pull{
  border-left:3px solid var(--accent);background:var(--bg-alt);
  padding:18px 22px;border-radius:0 var(--radius) var(--radius) 0;
  font-size:16px;color:var(--ink);margin:26px 0;
}
.pull strong{font-family:var(--font-serif);font-size:18px;}

/* ---------- checklist long list ---------- */
.spec-list{border-top:1px solid var(--line);margin-top:8px;}
.spec-item{
  display:grid;grid-template-columns:64px minmax(160px,220px) 1fr 28px;
  gap:20px;align-items:center;
  padding:22px 12px 22px 6px;border-bottom:1px solid var(--line);
  transition:background .2s var(--ease);
}
.spec-item:hover{background:var(--bg-alt);}
.spec-num{font-family:var(--font-serif);font-size:21px;color:var(--accent);line-height:1;}
.spec-name{font-size:16.5px;font-weight:600;color:var(--ink);line-height:1.5;}
.spec-desc{font-size:14.5px;color:var(--muted);line-height:1.75;}
.spec-arrow{display:flex;align-items:center;justify-content:flex-end;}
.spec-arrow svg{width:18px;height:18px;fill:none;stroke:var(--muted);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s var(--ease),stroke .2s var(--ease);}
.spec-item:hover .spec-arrow svg{transform:translateX(5px);stroke:var(--accent);}

/* ---------- steps ---------- */
.timeline{margin-top:12px;border-left:2px solid var(--line);padding-left:30px;}
.timeline-item{position:relative;padding-bottom:34px;}
.timeline-item:last-child{padding-bottom:0;}
.timeline-item::before{
  content:"";position:absolute;left:-37px;top:8px;width:12px;height:12px;
  border-radius:50%;background:#fff;border:2px solid var(--accent);
}
.timeline-item h3{margin:0 0 8px;font-size:18px;}
.timeline-item .step-meta{font-size:13px;color:var(--muted-light);margin-bottom:8px;letter-spacing:.06em;}
.timeline-item p{margin-bottom:0;font-size:15.5px;color:var(--muted);}

/* ---------- stats ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--ink);border-radius:var(--radius);overflow:hidden;
  margin:12px 0 0;
}
.stats div{padding:30px 24px;color:#fff;}
.stats div + div{border-left:1px solid rgba(255,255,255,.12);}
.stats strong{display:block;font-family:var(--font-serif);font-size:32px;line-height:1.3;color:#fff;}
.stats span{font-size:13.5px;color:var(--muted-light);}

/* ---------- cases ---------- */
.case{
  display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;
  padding:28px 0;border-bottom:1px solid var(--line);
}
.case:first-of-type{border-top:1px solid var(--line);margin-top:10px;}
.case:nth-of-type(even) figure{order:2;}
.case figure{margin:0;border-radius:var(--radius);overflow:hidden;background:var(--bg-alt);}
.case figure img{width:100%;aspect-ratio:5/4;object-fit:cover;}
.case .case-tag{
  display:inline-block;font-size:12.5px;letter-spacing:.08em;color:var(--stone);
  background:rgba(60,90,99,.08);border-radius:var(--radius-sm);padding:4px 10px;margin-bottom:12px;
}
.case h3{font-family:var(--font-serif);font-size:21px;margin:0 0 10px;}
.case p{font-size:15.5px;color:var(--muted);margin-bottom:14px;}
.case .case-kpi{
  font-family:var(--font-serif);font-size:28px;color:var(--accent);line-height:1.3;
}
.case .case-kpi small{display:block;font-family:var(--font-sans);font-size:13px;color:var(--muted-light);}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line);margin-top:8px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:none;border:none;text-align:left;cursor:pointer;
  padding:20px 4px;font-size:17px;font-weight:600;color:var(--ink);line-height:1.6;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--accent);}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border:1.5px solid var(--accent);border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  transition:transform .22s var(--ease);
}
.faq-icon svg{width:13px;height:13px;fill:none;stroke:var(--accent);stroke-width:1.8;stroke-linecap:round;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease);}
.faq-a p{padding:0 44px 22px 4px;font-size:15.5px;color:var(--muted);margin:0;}

/* ---------- cta band ---------- */
.cta-band{background:var(--bg-alt);border-top:1px solid var(--line);padding:80px 0;margin-top:0;}
.cta-inner{max-width:760px;margin:0 auto;text-align:center;}
.cta-inner h2{
  font-family:var(--font-serif);font-size:clamp(24px,3vw,32px);
  color:var(--ink);font-weight:600;line-height:1.34;letter-spacing:-.02em;
}
.cta-inner p{margin:16px 0 28px;color:var(--muted);font-size:16.5px;}
.cta-inner .btn-row{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#C9CFD3;padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px;padding-bottom:52px;}
.footer-brand .brand-name{color:#fff;font-family:var(--font-serif);font-size:19px;font-weight:600;letter-spacing:.02em;display:block;margin-bottom:14px;}
.footer-brand p{font-size:14px;color:var(--muted-light);line-height:1.85;max-width:300px;}
.footer-col h4{font-size:13px;letter-spacing:.12em;color:var(--muted-light);font-weight:600;margin:0 0 16px;}
.footer-col li{font-size:14px;color:#B7BEC3;padding:6px 0;transition:transform .2s var(--ease),color .2s var(--ease);}
.footer-col a{display:inline-block;}
.footer-col a:hover{color:#fff;transform:translateX(2px);}
.footer-bottom{
  border-top:1px solid var(--ink-soft);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:22px 0 26px;font-size:13px;color:#7C868C;
}

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

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .cat-grid{grid-template-columns:200px 1fr;gap:40px;}
  .spec-item{grid-template-columns:52px minmax(140px,190px) 1fr 24px;gap:16px;}
}
@media (max-width:1023px){
  .nav-links,.search{display:none;}
  .nav-burger{display:block;}
  .nav{height:60px;}
  .cat-body{padding-top:64px;}
  .cat-grid{grid-template-columns:1fr;gap:0;}
  .toc{position:static;border-left:none;border-bottom:1px solid var(--line);padding:0 0 24px;margin-bottom:40px;display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center;}
  .toc h2{width:100%;margin-bottom:6px;}
  .toc a{padding:4px 0;}
  .toc-note{display:none;}
  .main-flow{max-width:none;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 18px;}
  .site-header .brand-name{font-size:16.5px;}
  .cat-hero .container{padding-top:26px;padding-bottom:40px;}
  .cat-hero::after{background-image:linear-gradient(180deg,rgba(251,250,247,.94) 0%,rgba(251,250,247,.88) 60%,rgba(251,250,247,.7) 100%);}
  .hero-facts{grid-template-columns:1fr 1fr;gap:20px 0;margin-top:32px;}
  .hero-facts div{padding-right:0;}
  .hero-facts div + div{border-left:none;padding-left:0;}
  .hero-facts div:nth-child(even){border-left:1px solid var(--line-strong);padding-left:18px;}
  .hero-actions{gap:16px;}
  .hero-actions .btn{flex:1 1 auto;}
  .block{padding-bottom:56px;}
  .split{grid-template-columns:1fr;gap:20px;}
  .spec-item{grid-template-columns:44px 1fr 22px;grid-template-areas:"num name arrow" ". desc arrow";row-gap:6px;padding:18px 4px;}
  .spec-num{grid-area:num;}
  .spec-name{grid-area:name;}
  .spec-desc{grid-area:desc;}
  .spec-arrow{grid-area:arrow;align-self:start;margin-top:4px;}
  .stats{grid-template-columns:1fr 1fr;}
  .stats div + div{border-left:none;}
  .stats div:nth-child(even){border-left:1px solid rgba(255,255,255,.12);}
  .stats div:nth-child(n+3){border-top:1px solid rgba(255,255,255,.12);}
  .case{grid-template-columns:1fr;gap:18px;}
  .case:nth-of-type(even) figure{order:0;}
  .timeline{padding-left:22px;}
  .timeline-item::before{left:-29px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding-bottom:36px;}
  .footer-brand{grid-column:1 / -1;}
  .cta-band{padding:56px 0;}
}
@media (max-width:520px){
  .cat-hero h1{font-size:27px;}
  .cat-hero .hero-sub{font-size:15.5px;}
  .hero-facts{grid-template-columns:1fr;}
  .hero-facts div:nth-child(even){border-left:none;padding-left:0;}
  .hero-actions{flex-direction:column;align-items:stretch;gap:12px;}
  .hero-actions .link-arrow{align-self:flex-start;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-inner .btn-row .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --ink:#101418;
  --accent:#C25A2C;
  --stone:#3C5A63;
  --paper:#FBFAF7;
  --sub:#F3F1EC;
  --line:#E9E5DE;
  --line-strong:#E3DFD7;
  --text:#3A4148;
  --muted:#6B7480;
  --inv:#9AA3A8;
  --ok:#2F7A55;
  --err:#B4341F;
  --radius-sm:4px;
  --radius:12px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(16,20,24,.05);
  --shadow-2:0 8px 22px -10px rgba(16,20,24,.18);
  --shadow-3:0 16px 38px -16px rgba(16,20,24,.26);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
  --serif:"Noto Serif SC","Songti SC","Source Han Serif SC",Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.8;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
svg{width:100%;height:100%;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:2px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:112px 0;}
.section--tight{padding:80px 0;}
.section--sub{background:var(--sub);}
.section--ink{background:var(--ink);color:#fff;}
.eyebrow{
  font-size:13px;letter-spacing:.16em;color:var(--accent);
  text-transform:uppercase;font-weight:600;margin-bottom:16px;
}
.section-head{max-width:760px;margin-bottom:56px;}
.section-head h2{
  font-family:var(--serif);
  font-size:38px;line-height:1.25;letter-spacing:-.02em;
  color:var(--ink);font-weight:700;
}
.section--ink .section-head h2{color:#fff;}
.section-head .lead{margin-top:18px;font-size:16.5px;color:var(--muted);max-width:640px;}
.section--ink .section-head .lead{color:var(--inv);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--ink);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--accent);transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{border:1px solid #C9C3B8;color:var(--ink);background:transparent;}
.btn-ghost:hover{border-color:var(--ink);color:var(--accent);transform:translateY(-1px);}
.btn-sm{height:38px;padding:0 20px;font-size:14px;}
.btn-block{width:100%;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--ink);
  border-bottom:1px solid transparent;transition:color .2s var(--ease);
}
.link-arrow span{transition:transform .2s var(--ease);display:inline-block;}
.link-arrow:hover{color:var(--accent);}
.link-arrow:hover span{transform:translateX(4px);}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 18px -12px rgba(16,20,24,.35);}
.nav{
  display:flex;align-items:center;gap:32px;
  min-height:68px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand svg{width:30px;height:30px;stroke:#101418;flex:0 0 auto;}
.brand-name{
  font-family:var(--serif);font-size:18px;font-weight:600;
  letter-spacing:.02em;color:var(--ink);
}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:12px;}
.nav-links a{
  position:relative;font-size:15px;color:var(--text);
  padding:6px 0;transition:color .2s var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--ink);font-weight:600;}
.nav-links a.is-active::after{transform:scaleX(1);}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto;}
.search{
  position:relative;display:flex;align-items:center;
  width:200px;height:38px;border-radius:var(--radius-pill);
  background:var(--sub);padding:0 14px;gap:8px;
  transition:background .2s var(--ease),box-shadow .2s var(--ease);
}
.search svg{width:16px;height:16px;color:var(--muted);flex:0 0 auto;stroke-width:1.8;}
.search input{
  width:100%;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--ink);
}
.search input::placeholder{color:var(--muted);}
.search:focus-within{background:#fff;box-shadow:0 0 0 1px var(--accent),0 0 0 4px rgba(194,90,44,.08);}
.nav-burger{
  display:none;width:44px;height:44px;border-radius:10px;
  align-items:center;justify-content:center;color:var(--ink);
}
.nav-burger svg{width:22px;height:22px;}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;
  padding:72px 0 80px;
  background:
    linear-gradient(180deg,rgba(251,250,247,.96),rgba(251,250,247,.82)),
    repeating-linear-gradient(90deg,rgba(16,20,24,.045) 0 1px,transparent 1px 88px);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.cat-hero-grid{
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:56px;align-items:center;
}
.breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);margin-bottom:22px;
}
.breadcrumb a{color:var(--muted);transition:color .2s var(--ease);}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb span[aria-hidden]{color:#C3BEB4;}
.kicker{
  font-size:13px;letter-spacing:.14em;color:var(--stone);
  font-weight:600;margin-bottom:14px;
}
.cat-hero h1{
  font-family:var(--serif);
  font-size:54px;line-height:1.12;letter-spacing:-.02em;
  color:var(--ink);font-weight:700;max-width:620px;
}
.cat-hero-sub{
  margin-top:20px;font-size:17px;color:var(--muted);max-width:520px;
}
.hero-actions{display:flex;align-items:center;gap:26px;margin-top:32px;flex-wrap:wrap;}
.cat-hero-media{
  position:relative;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);background:#fff;box-shadow:var(--shadow-2);
}
.cat-hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}

/* ---------- 引入段 ---------- */
.intro-grid{
  display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);
  gap:64px;align-items:center;
}
.intro-copy h2{
  font-family:var(--serif);font-size:36px;line-height:1.28;
  letter-spacing:-.02em;color:var(--ink);margin-bottom:22px;font-weight:700;
}
.intro-copy p{color:var(--text);margin-bottom:18px;max-width:560px;}
.intro-copy p:last-child{margin-bottom:0;}
.intro-figure{margin:0;}
.intro-figure img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow-1);
}
.intro-figure figcaption{
  margin-top:12px;font-size:12.5px;color:var(--muted);
  letter-spacing:.02em;
}
.intro-points{margin-top:26px;border-top:1px solid var(--line);}
.intro-points li{
  display:flex;gap:16px;align-items:flex-start;
  padding:14px 0;border-bottom:1px solid var(--line);font-size:15.5px;
}
.intro-points b{color:var(--accent);font-family:var(--serif);font-size:15px;min-width:28px;}

/* ---------- 标签切换 ---------- */
.tabs{
  display:flex;gap:8px;flex-wrap:wrap;
  border-bottom:1px solid var(--line);padding-bottom:0;margin-bottom:44px;
}
.tab{
  position:relative;padding:12px 20px;font-size:15px;font-weight:600;
  color:var(--muted);border-radius:var(--radius) var(--radius) 0 0;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.tab:hover{color:var(--ink);background:var(--sub);}
.tab.is-active{color:var(--ink);}
.tab.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--accent);
}
.tab-panel{display:none;}
.tab-panel.is-active{display:block;animation:fadeUp .32s var(--ease);}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:none;}}
.panel-grid{
  display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:56px;align-items:center;
}
.panel-grid img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow-2);
}
.panel-grid h3{
  font-family:var(--serif);font-size:26px;line-height:1.35;
  color:var(--ink);margin-bottom:16px;font-weight:700;
}
.panel-grid p{color:var(--muted);margin-bottom:22px;}
.check-list li{
  position:relative;padding-left:26px;margin-bottom:12px;font-size:15.5px;color:var(--text);
}
.check-list li::before{
  content:"";position:absolute;left:0;top:11px;width:12px;height:2px;
  background:var(--accent);border-radius:2px;
}

/* ---------- 瀑布卡片 ---------- */
.waterfall{columns:3;column-gap:24px;margin-top:8px;}
.waterfall .fcard{
  break-inside:avoid;margin-bottom:24px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.waterfall .fcard:hover{
  transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:#D6D0C6;
}
.fcard .fnum{
  font-family:var(--serif);font-size:13px;letter-spacing:.14em;
  color:var(--accent);font-weight:600;display:block;margin-bottom:14px;
}
.fcard h3{font-family:var(--serif);font-size:20px;line-height:1.4;color:var(--ink);margin-bottom:12px;font-weight:700;}
.fcard p{font-size:15px;color:var(--muted);}
.fcard .fmeta{
  margin-top:18px;padding-top:16px;border-top:1px dashed var(--line);
  font-size:13px;color:var(--muted);letter-spacing:.02em;
}
.fcard--tint{background:var(--sub);}
.fcard--ink{background:var(--ink);border-color:var(--ink);}
.fcard--ink h3{color:#fff;}
.fcard--ink p{color:#C6CBCE;}
.fcard--ink .fnum{color:#E9A87F;}
.fcard--ink .fmeta{color:var(--inv);border-top-color:#2A3136;}

/* ---------- 流程时间轴 ---------- */
.timeline{position:relative;margin-top:8px;}
.timeline::before{
  content:"";position:absolute;left:19px;top:12px;bottom:12px;width:1px;
  background:var(--line-strong);
}
.timeline li{
  position:relative;padding:0 0 40px 68px;
}
.timeline li:last-child{padding-bottom:0;}
.timeline .dot{
  position:absolute;left:0;top:2px;width:40px;height:40px;border-radius:var(--radius-pill);
  display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line-strong);
  font-family:var(--serif);font-size:14px;font-weight:600;color:var(--stone);
  transition:border-color .24s var(--ease),color .24s var(--ease);
}
.timeline li:hover .dot{border-color:var(--accent);color:var(--accent);}
.timeline h3{
  font-family:var(--serif);font-size:20px;color:var(--ink);
  margin-bottom:8px;font-weight:700;line-height:1.4;
}
.timeline p{font-size:15.5px;color:var(--muted);max-width:640px;}
.timeline .tagline{
  display:inline-block;margin-left:12px;font-size:12px;letter-spacing:.1em;
  color:var(--stone);background:var(--sub);border-radius:var(--radius-sm);
  padding:2px 8px;vertical-align:middle;
}

/* ---------- 数据条 ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  margin-top:8px;border:1px solid var(--line);border-radius:var(--radius);
  background:#fff;overflow:hidden;
}
.stats li{
  padding:34px 28px;border-right:1px solid var(--line);
}
.stats li:last-child{border-right:0;}
.stats .num{
  display:block;font-family:var(--serif);font-size:38px;line-height:1.1;
  color:var(--ink);font-weight:700;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
}
.stats .num small{font-size:16px;font-weight:600;margin-left:2px;color:var(--muted);}
.stats .cap{display:block;margin-top:10px;font-size:14px;color:var(--muted);}

/* ---------- 案例 ---------- */
.case{
  display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);
  gap:56px;align-items:center;padding:48px 0;
  border-bottom:1px solid var(--line);
}
.case:last-child{border-bottom:0;padding-bottom:0;}
.case--reverse .case-media{order:2;}
.case--reverse .case-body{order:1;}
.case-media img{
  width:100%;aspect-ratio:16/11;object-fit:cover;
  border-radius:var(--radius);border:1px solid var(--line);
}
.case-body .tag{
  display:inline-block;font-size:12px;letter-spacing:.12em;
  color:var(--stone);background:var(--sub);border-radius:var(--radius-sm);
  padding:4px 10px;margin-bottom:16px;
}
.case-body h3{
  font-family:var(--serif);font-size:24px;line-height:1.4;
  color:var(--ink);margin-bottom:14px;font-weight:700;
}
.case-body p{color:var(--muted);font-size:15.5px;margin-bottom:20px;}
.case-figure{
  display:flex;align-items:baseline;gap:10px;
  padding-top:18px;border-top:1px solid var(--line);
}
.case-figure strong{
  font-family:var(--serif);font-size:32px;color:var(--accent);
  font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.case-figure span{font-size:14px;color:var(--muted);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 0;text-align:left;font-size:17px;font-weight:600;color:var(--ink);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--accent);}
.faq-icon{
  flex:0 0 auto;width:24px;height:24px;border-radius:50%;
  border:1.5px solid var(--accent);color:var(--accent);
  display:flex;align-items:center;justify-content:center;
  transition:transform .22s var(--ease);
}
.faq-icon svg{width:12px;height:12px;stroke-width:2;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .24s var(--ease),opacity .24s var(--ease),padding .24s var(--ease);
  opacity:0;
}
.faq-item.is-open .faq-a{max-height:340px;opacity:1;padding-bottom:24px;}
.faq-a p{font-size:15.5px;line-height:1.85;color:var(--muted);max-width:700px;}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:var(--sub);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:88px 0;text-align:center;
}
.cta-band h2{
  font-family:var(--serif);font-size:36px;line-height:1.25;
  letter-spacing:-.02em;color:var(--ink);font-weight:700;
}
.cta-band p{margin-top:16px;color:var(--muted);font-size:16px;}
.cta-actions{
  margin-top:32px;display:flex;align-items:center;justify-content:center;gap:26px;flex-wrap:wrap;
}
.cta-note{margin-top:22px;font-size:13px;color:var(--muted);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#C6CBCE;padding:72px 0 26px;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;
}
.footer-brand .brand-name{
  font-family:var(--serif);font-size:18px;font-weight:600;color:#fff;letter-spacing:.02em;
}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:var(--inv);max-width:300px;}
.footer-col h4{
  font-size:13px;letter-spacing:.12em;color:var(--inv);
  font-weight:600;margin-bottom:18px;
}
.footer-col ul li{font-size:14px;line-height:1.9;color:#C6CBCE;}
.footer-col ul li a{transition:color .2s var(--ease),transform .2s var(--ease);display:inline-block;}
.footer-col ul li a:hover{color:#fff;transform:translateX(-2px);}
.footer-bottom{
  margin-top:56px;padding-top:22px;border-top:1px solid #2A3136;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--inv);
}

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

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .cat-hero h1{font-size:46px;}
  .waterfall{columns:2;}
  .section{padding:96px 0;}
}
@media (max-width:1023px){
  .nav-links{
    position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);
    background:#fff;flex-direction:column;align-items:flex-start;gap:4px;
    margin:0;padding:88px 24px 24px;border-left:1px solid var(--line);
    transform:translateX(102%);transition:transform .28s var(--ease);
    box-shadow:var(--shadow-3);z-index:80;overflow-y:auto;
  }
  .nav-links.is-open{transform:none;}
  .nav-links a{width:100%;padding:14px 0;font-size:16px;border-bottom:1px solid var(--line);}
  .nav-links a::after{display:none;}
  .nav-links a.is-active{color:var(--accent);}
  .nav-burger{display:inline-flex;}
  .search{width:160px;}
  .cat-hero-grid,.intro-grid,.panel-grid,.case{grid-template-columns:1fr;gap:36px;}
  .case--reverse .case-media{order:1;}
  .case--reverse .case-body{order:2;}
  .stats{grid-template-columns:1fr 1fr;}
  .stats li:nth-child(2){border-right:0;}
  .stats li:nth-child(1),.stats li:nth-child(2){border-bottom:1px solid var(--line);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 18px;}
  .section{padding:64px 0;}
  .section--tight{padding:56px 0;}
  .search{display:none;}
  .cat-hero{padding:36px 0 56px;}
  .cat-hero h1{font-size:32px;}
  .cat-hero-sub{font-size:16px;}
  .section-head{margin-bottom:36px;}
  .section-head h2{font-size:25px;}
  .intro-copy h2{font-size:25px;}
  .waterfall{columns:1;}
  .timeline::before{left:15px;}
  .timeline li{padding-left:54px;}
  .timeline .dot{width:32px;height:32px;font-size:12.5px;}
  .stats{grid-template-columns:1fr;}
  .stats li{border-right:0;border-bottom:1px solid var(--line);padding:26px 22px;}
  .stats li:last-child{border-bottom:0;}
  .stats .num{font-size:32px;}
  .cta-band{padding:64px 0;}
  .cta-band h2{font-size:25px;}
  .btn{width:100%;}
  .cta-actions .btn{width:100%;}
  .hero-actions{gap:18px;}
  .hero-actions .link-arrow{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:480px){
  .cat-hero h1{font-size:28px;}
  .tabs{gap:4px;}
  .tab{padding:10px 12px;font-size:14px;}
  .faq-q{font-size:15.5px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}