/* roulang page: index */
:root{
  --ink:#0E1A16;
  --sand:#F6F3ED;
  --white:#FFFFFF;
  --jade:#2FBF9B;
  --jade-soft:rgba(47,191,155,.12);
  --clay:#C8622F;
  --text:#1B2320;
  --muted:#5D6B65;
  --line:#E2DCD0;
  --soft:#EFEAE1;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-input:12px;
  --shadow-card:0 1px 2px rgba(14,26,22,.04),0 14px 34px -20px rgba(14,26,22,.20);
  --shadow-hover:0 20px 44px -22px rgba(14,26,22,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1240px;
  --gap:28px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--sand);
  color:var(--text);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:17px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:var(--text);text-decoration:none;transition:color .22s var(--ease);}
a:hover{color:var(--jade);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{
  margin:0;
  font-family:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  font-weight:600;
  letter-spacing:-.02em;
  color:var(--ink);
  line-height:1.28;
}
p{margin:0;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
:focus-visible{outline:2px solid var(--jade);outline-offset:3px;border-radius:4px;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
@media (min-width:1440px){.container{max-width:1280px;}}

.section{padding:88px 0;}
.section--soft{background:var(--soft);}
.section--tight{padding:64px 0;}
.section-head{margin-bottom:38px;}
.eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--jade);
  font-weight:700;
  margin-bottom:12px;
}
.section-title{
  font-size:clamp(1.7rem,2.6vw,2.5rem);
}
.section-desc{
  margin-top:14px;
  color:var(--muted);
  max-width:680px;
  font-size:16px;
}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:14px 26px;
  border-radius:var(--radius-btn);
  font-weight:600;
  font-size:16px;
  line-height:1;
  border:1px solid transparent;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn i{transition:transform .22s var(--ease);}
.btn:hover i{transform:translateX(6px);}
.btn-primary{background:var(--ink);color:#fff;}
.btn-primary:hover{background:var(--jade);color:var(--ink);box-shadow:var(--shadow-hover);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{background:var(--jade-soft);border-color:var(--jade);color:var(--ink);}
.btn-light{background:#fff;color:var(--ink);}
.btn-light:hover{background:var(--jade);color:var(--ink);}
.btn-sm{padding:11px 20px;font-size:15px;}

/* ============ Badge / Tag ============ */
.badge{
  display:inline-block;
  padding:5px 12px;
  border-radius:999px;
  background:var(--jade-soft);
  color:#177a62;
  font-size:13px;
  font-weight:600;
  line-height:1.4;
}
.badge--hot{background:rgba(200,98,47,.12);color:var(--clay);}

/* ============ Header / Nav ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.site-header.is-scrolled{
  border-bottom:1px solid var(--line);
  box-shadow:0 6px 24px -18px rgba(14,26,22,.35);
}
.nav-bar{
  display:flex;
  align-items:center;
  gap:22px;
  height:76px;
}
.brand{
  display:flex;
  align-items:center;
  gap:11px;
  flex:0 0 auto;
}
.brand-mark{
  width:40px;height:40px;
  border-radius:11px;
  background:var(--ink);
  color:var(--jade);
  display:flex;align-items:center;justify-content:center;
  font-family:"Noto Serif SC",serif;
  font-size:17px;
  font-weight:700;
  letter-spacing:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{
  font-family:"Noto Serif SC",serif;
  font-size:17px;
  font-weight:700;
  color:var(--ink);
  letter-spacing:-.01em;
}
.brand-sub{font-size:11px;color:var(--muted);letter-spacing:.06em;}

.nav-search{
  flex:1 1 auto;
  max-width:640px;
  position:relative;
  display:flex;
  align-items:center;
}
.nav-search i.fa-magnifying-glass{
  position:absolute;
  left:16px;
  top:50%;
  transform:translateY(-50%);
  color:var(--muted);
  font-size:15px;
  pointer-events:none;
}
.nav-search input{
  width:100%;
  height:52px;
  border-radius:var(--radius-input);
  border:1px solid var(--line);
  background:#fff;
  padding:0 118px 0 44px;
  font-size:15px;
  color:var(--text);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.nav-search input::placeholder{color:#8b978f;}
.nav-search input:focus{
  outline:none;
  border-color:var(--jade);
  box-shadow:0 0 0 3px rgba(47,191,155,.16);
}
.nav-search button{
  position:absolute;
  right:6px;
  height:40px;
  padding:0 18px;
  border-radius:10px;
  background:var(--ink);
  color:#fff;
  font-size:14px;
  font-weight:600;
  transition:background .22s var(--ease),color .22s var(--ease);
}
.nav-search button:hover{background:var(--jade);color:var(--ink);}

.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.nav-links a{
  padding:10px 14px;
  border-radius:9px;
  font-size:15px;
  font-weight:500;
  color:var(--ink);
  white-space:nowrap;
}
.nav-links a:hover{background:var(--soft);color:var(--ink);}
.nav-links a.active{color:var(--jade);font-weight:700;}
.nav-cta{margin-left:8px;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:10px;
  border:1px solid var(--line);
  color:var(--ink);
  align-items:center;justify-content:center;
  font-size:17px;
  background:#fff;
}

.drawer{
  position:fixed;
  inset:0;
  z-index:90;
  background:rgba(14,26,22,.45);
  opacity:0;
  visibility:hidden;
  transition:opacity .24s var(--ease),visibility .24s var(--ease);
}
.drawer.is-open{opacity:1;visibility:visible;}
.drawer-panel{
  position:absolute;
  top:0;right:0;
  width:min(88vw,380px);
  height:100%;
  background:#fff;
  padding:22px;
  overflow-y:auto;
  transform:translateX(100%);
  transition:transform .3s var(--ease);
}
.drawer.is-open .drawer-panel{transform:translateX(0);}
.drawer-close{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;margin-left:auto;background:#fff;
}
.drawer-search{position:relative;margin:18px 0 22px;}
.drawer-search i{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--muted);}
.drawer-search input{
  width:100%;height:50px;border-radius:var(--radius-input);
  border:1px solid var(--line);padding:0 16px 0 40px;background:#fff;
}
.drawer-search input:focus{outline:none;border-color:var(--jade);box-shadow:0 0 0 3px rgba(47,191,155,.16);}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  padding:15px 4px;
  border-bottom:1px solid var(--line);
  font-size:16px;font-weight:500;
}
.drawer-nav a i{color:var(--muted);font-size:13px;}
.drawer-nav a.active{color:var(--jade);}
.drawer .btn{width:100%;justify-content:center;margin-top:22px;}

/* ============ Hero ============ */
.hero{
  position:relative;
  background-image:linear-gradient(rgba(14,26,22,.86),rgba(14,26,22,.58)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  color:#fff;
  overflow:hidden;
}
.hero::after{
  content:"";
  position:absolute;
  right:-140px;bottom:-160px;
  width:460px;height:460px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(47,191,155,.28),transparent 68%);
}
.hero-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:56px;
  align-items:center;
  padding:96px 0 92px;
}
.hero-tag{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 15px;
  border-radius:999px;
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.22);
  font-size:13px;
  color:#d8e6df;
  margin-bottom:22px;
}
.hero-tag span.dot{width:7px;height:7px;border-radius:50%;background:var(--jade);display:inline-block;}
.hero h1{
  color:#fff;
  font-size:clamp(2.4rem,4.6vw,4rem);
  margin-bottom:20px;
}
.hero h1 em{font-style:normal;color:var(--jade);}
.hero-sub{
  font-size:17px;
  color:#c8d5cf;
  max-width:560px;
  margin-bottom:32px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-actions .btn-ghost{color:#fff;border-color:rgba(255,255,255,.32);}
.hero-actions .btn-ghost:hover{background:rgba(255,255,255,.12);border-color:var(--jade);color:#fff;}

.hero-panel{
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.18);
  border-radius:20px;
  padding:24px;
  backdrop-filter:blur(4px);
  -webkit-backdrop-filter:blur(4px);
}
.hero-panel img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:14px;
  margin-bottom:20px;
}
.hero-panel h3{color:#fff;font-size:18px;margin-bottom:6px;}
.hero-panel p{color:#b9c8c1;font-size:14px;}
.hero-metrics{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
  margin-top:20px;
  border-top:1px solid rgba(255,255,255,.16);
  padding-top:18px;
}
.hero-metrics b{
  display:block;
  font-family:"Noto Serif SC",serif;
  font-size:22px;
  color:#fff;
  font-variant-numeric:tabular-nums;
  line-height:1.2;
}
.hero-metrics span{font-size:12px;color:#9fb1aa;}

/* ============ Entry pills ============ */
.entry-strip{
  background:#fff;
  border-bottom:1px solid var(--line);
}
.entry-pills{
  display:flex;
  gap:12px;
  padding:22px 0;
  overflow-x:auto;
  scrollbar-width:none;
}
.entry-pills::-webkit-scrollbar{display:none;}
.pill{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:11px 20px;
  border-radius:999px;
  border:1px solid var(--line);
  background:#fff;
  font-size:15px;
  font-weight:500;
  color:var(--ink);
  transition:background .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.pill i{color:var(--jade);font-size:14px;}
.pill:hover{background:var(--jade-soft);border-color:var(--jade);transform:translateY(-2px);}

/* ============ Services (sticky + numbered list) ============ */
.service-grid{
  display:grid;
  grid-template-columns:minmax(260px,340px) 1fr;
  gap:56px;
  align-items:start;
}
.service-aside{position:sticky;top:108px;}
.service-aside .section-title{margin-bottom:16px;}
.service-aside p{color:var(--muted);font-size:16px;margin-bottom:22px;}
.text-link{
  display:inline-flex;align-items:center;gap:8px;
  font-weight:600;color:var(--ink);
  border-bottom:2px solid var(--jade);
  padding-bottom:3px;
}
.text-link:hover{color:var(--jade);}
.text-link i{transition:transform .22s var(--ease);}
.text-link:hover i{transform:translateX(6px);}

.service-list{border-top:1px solid var(--line);}
.service-item{
  display:grid;
  grid-template-columns:64px 1fr 40px;
  gap:18px;
  align-items:center;
  padding:24px 16px;
  border-bottom:1px solid var(--line);
  transition:background .22s var(--ease),transform .22s var(--ease);
}
.service-item:hover{background:#fff;transform:translateX(4px);}
.service-num{
  width:44px;height:44px;
  border-radius:12px;
  background:var(--soft);
  color:var(--clay);
  display:flex;align-items:center;justify-content:center;
  font-family:"Noto Serif SC",serif;
  font-weight:700;
  font-size:16px;
  font-variant-numeric:tabular-nums;
}
.service-item h3{font-size:19px;margin-bottom:5px;}
.service-item p{color:var(--muted);font-size:15px;}
.service-arrow{
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  color:var(--ink);
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.service-item:hover .service-arrow{background:var(--ink);border-color:var(--ink);color:#fff;}

/* ============ Stats band ============ */
.stats{
  background:var(--ink);
  color:#fff;
  padding:72px 0;
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
}
.stat{
  padding:8px 26px;
  border-left:1px solid rgba(255,255,255,.14);
}
.stat:first-child{border-left:0;padding-left:0;}
.stat b{
  display:block;
  font-family:"Noto Serif SC",serif;
  font-size:clamp(2rem,3.2vw,2.9rem);
  line-height:1.1;
  color:#fff;
  font-variant-numeric:tabular-nums;
  margin-bottom:10px;
}
.stat b em{font-style:normal;color:var(--jade);}
.stat span{color:#a9b8b2;font-size:15px;}

/* ============ Cases ============ */
.case-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:var(--gap);
  align-items:center;
  margin-bottom:56px;
}
.case-row:last-child{margin-bottom:0;}
.case-row.reverse .case-text{order:2;}
.case-row.reverse .case-media{order:1;}
.case-row.offset{margin-top:-8px;}
.case-media{
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.case-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.case-media:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.case-text{padding:6px 4px;}
.case-text h3{font-size:22px;margin:14px 0 12px;}
.case-text p{color:var(--muted);font-size:16px;}
.case-result{
  margin-top:18px;
  padding:14px 18px;
  border-left:3px solid var(--jade);
  background:var(--soft);
  border-radius:0 12px 12px 0;
  font-size:15px;
  color:var(--ink);
}

/* ============ Solutions ============ */
.solution-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
  padding:44px 0;
  border-bottom:1px solid var(--line);
}
.solution-row:last-child{border-bottom:0;padding-bottom:0;}
.solution-row:first-child{padding-top:0;}
.solution-row.reverse .solution-text{order:2;}
.solution-row.reverse .solution-media{order:1;}
.solution-media{border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);}
.solution-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.solution-text h3{font-size:23px;margin-bottom:16px;}
.solution-points{margin:0 0 22px;}
.solution-points li{
  position:relative;
  padding-left:26px;
  margin-bottom:11px;
  font-size:16px;
  color:var(--muted);
}
.solution-points li::before{
  content:"";
  position:absolute;
  left:0;top:11px;
  width:9px;height:9px;
  background:var(--jade);
  border-radius:2px;
}

/* ============ FAQ ============ */
.faq-wrap{max-width:920px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:grid;
  grid-template-columns:64px 1fr 32px;
  gap:16px;
  align-items:center;
  text-align:left;
  padding:22px 0;
  background:none;
}
.faq-idx{
  font-family:"Noto Serif SC",serif;
  color:var(--clay);
  font-weight:700;
  font-size:15px;
  font-variant-numeric:tabular-nums;
}
.faq-q h3{font-size:18px;line-height:1.7;font-weight:600;}
.faq-icon{
  width:30px;height:30px;
  border-radius:50%;
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;color:var(--ink);
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.faq-item.is-open .faq-icon{background:var(--ink);border-color:var(--ink);color:#fff;transform:rotate(180deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .26s var(--ease);
}
.faq-a-inner{
  padding:0 32px 26px 80px;
  color:var(--muted);
  font-size:16px;
}
@media (max-width:640px){
  .faq-a-inner{padding:0 4px 22px 22px;}
}

/* ============ News / CMS ============ */
.news-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:34px;
}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);}
.news-card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
  display:flex;
  flex-direction:column;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#cfd8d2;}
.news-link{display:flex;flex-direction:column;height:100%;}
.news-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.news-body{padding:20px;display:flex;flex-direction:column;gap:11px;flex:1;}
.news-body h3{
  font-size:18px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-body p{
  color:var(--muted);
  font-size:15px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-meta{
  margin-top:auto;
  padding-top:12px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--muted);
  font-variant-numeric:tabular-nums;
}
.news-meta .sep{width:1px;height:12px;background:var(--line);display:inline-block;}
.empty-state{
  min-height:220px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:14px;
  background:#fff;
  border:1px dashed var(--line);
  border-radius:var(--radius-card);
  color:var(--muted);
  font-size:15px;
}
.empty-state i{font-size:24px;color:var(--jade);}

/* ============ Contact ============ */
.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:start;
}
.contact-info h2{margin-bottom:16px;}
.contact-info > p{color:var(--muted);margin-bottom:26px;}
.info-list li{
  display:flex;gap:14px;
  padding:14px 0;
  border-bottom:1px solid var(--line);
  font-size:15px;
}
.info-list i{color:var(--jade);width:20px;text-align:center;margin-top:4px;}
.info-list b{display:block;font-weight:600;color:var(--ink);margin-bottom:2px;}
.info-list span{color:var(--muted);}
.form-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:30px;
  box-shadow:var(--shadow-card);
}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;color:var(--ink);}
.field input,
.field select,
.field textarea{
  width:100%;
  height:48px;
  border:1px solid var(--line);
  border-radius:var(--radius-input);
  padding:0 14px;
  background:#fff;
  font-size:15px;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.field textarea{height:118px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input:focus,
.field select:focus,
.field textarea:focus{
  outline:none;
  border-color:var(--jade);
  box-shadow:0 0 0 3px rgba(47,191,155,.16);
}
.form-note{font-size:13px;color:var(--muted);margin-top:12px;}
.form-card .btn{width:100%;justify-content:center;}

/* ============ CTA band ============ */
.cta-band{
  background:var(--ink);
  color:#fff;
  padding:60px 0;
}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:30px;
  flex-wrap:wrap;
}
.cta-inner h2{color:#fff;font-size:clamp(1.5rem,2.4vw,2.1rem);}
.cta-inner p{color:#a9b8b2;margin-top:8px;font-size:16px;}

/* ============ Footer ============ */
.site-footer{
  background:var(--ink);
  color:#9fb1aa;
  padding:70px 0 0;
  font-size:15px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:46px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.08);color:var(--jade);}
.footer-brand .brand-name{color:#fff;font-size:17px;}
.footer-col h4{
  color:#fff;
  font-size:16px;
  margin-bottom:18px;
  font-family:"Noto Sans SC",sans-serif;
  font-weight:600;
}
.footer-col p{color:#93a49d;line-height:1.9;}
.footer-col li{margin-bottom:11px;}
.footer-col a{
  color:#9fb1aa;
  display:inline-block;
  transition:color .22s var(--ease),transform .22s var(--ease);
}
.footer-col a:hover{color:var(--jade);transform:translateX(-2px);}
.footer-bottom{
  padding:22px 0 30px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:#7f918a;
}

/* ============ Back to top ============ */
.to-top{
  position:fixed;
  right:24px;bottom:26px;
  width:46px;height:46px;
  border-radius:50%;
  background:var(--ink);
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-hover);
  opacity:0;visibility:hidden;
  transform:translateY(10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease),background .22s var(--ease);
  z-index:70;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--jade);color:var(--ink);}

/* ============ Reveal ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ============ Responsive ============ */
@media (max-width:1023px){
  .nav-search{display:none;}
  .nav-links{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .nav-bar{height:64px;}
  .hero-inner{grid-template-columns:1fr;gap:40px;padding:70px 0 66px;}
  .service-grid{grid-template-columns:1fr;gap:32px;}
  .service-aside{position:static;}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:32px 0;}
  .stat:nth-child(3){border-left:0;padding-left:0;}
  .case-row{grid-template-columns:1fr;gap:24px;margin-bottom:44px;}
  .case-row.reverse .case-text{order:1;}
  .case-row.reverse .case-media{order:2;}
  .solution-row{grid-template-columns:1fr;gap:26px;}
  .solution-row.reverse .solution-text{order:1;}
  .solution-row.reverse .solution-media{order:2;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .contact-grid{grid-template-columns:1fr;gap:34px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .section{padding:64px 0;}
}
@media (max-width:639px){
  body{font-size:16px;}
  .container{padding:0 18px;}
  .brand-sub{display:none;}
  .section{padding:52px 0;}
  .hero h1{font-size:clamp(1.9rem,8vw,2.4rem);}
  .hero-metrics{grid-template-columns:1fr;gap:12px;}
  .hero-metrics b{font-size:20px;}
  .service-item{grid-template-columns:48px 1fr 32px;gap:12px;padding:20px 8px;}
  .service-num{width:38px;height:38px;font-size:14px;}
  .stats-grid{grid-template-columns:1fr;}
  .stat{border-left:0;padding:0 0 22px;border-bottom:1px solid rgba(255,255,255,.12);margin-bottom:22px;}
  .stat:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0;}
  .news-grid{grid-template-columns:1fr;}
  .faq-q{grid-template-columns:38px 1fr 30px;gap:10px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .to-top{right:16px;bottom:18px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --ink:#0E1A16;
  --ink-2:#16241F;
  --sand:#F6F3ED;
  --white:#FFFFFF;
  --green:#2FBF9B;
  --green-soft:#E4F7F1;
  --green-deep:#177A61;
  --clay:#C8622F;
  --text:#1B2320;
  --muted:#5D6B65;
  --line:#E2DCD0;
  --soft:#EFEAE1;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-input:12px;
  --shadow-card:0 1px 2px rgba(14,26,22,.04),0 14px 34px -20px rgba(14,26,22,.20);
  --shadow-hover:0 20px 44px -22px rgba(14,26,22,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--sand);
  color:var(--text);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.8;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--ink);text-decoration:none;transition:color .22s var(--ease);}
a:hover{color:var(--green-deep);}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;letter-spacing:-.02em;color:var(--ink);margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--green);outline-offset:3px;border-radius:4px;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
@media(min-width:1440px){.container{max-width:1280px;}}
@media(max-width:640px){.container{padding:0 18px;}}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 8px 24px -20px rgba(14,26,22,.5);}
.nav-inner{
  display:flex;align-items:center;gap:28px;
  height:76px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:10px;
  background:var(--ink);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--serif);font-size:16px;letter-spacing:.02em;
}
.brand-name{font-family:var(--serif);font-size:18px;font-weight:600;color:var(--ink);white-space:nowrap;}
.nav-search{
  flex:1 1 auto;max-width:640px;min-width:0;
  display:flex;align-items:center;
  background:var(--white);border:1px solid var(--line);
  border-radius:var(--radius-input);
  height:52px;padding:0 6px 0 14px;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.nav-search:focus-within{border-color:var(--green);box-shadow:0 0 0 3px rgba(47,191,155,.16);}
.nav-search svg{flex:0 0 auto;width:20px;height:20px;stroke:var(--muted);}
.nav-search input{
  flex:1 1 auto;min-width:0;height:100%;
  border:0;background:transparent;outline:none;
  padding:0 12px;font-size:15px;color:var(--text);
}
.nav-search input::placeholder{color:#9AA7A1;}
.nav-search button{
  flex:0 0 auto;height:40px;padding:0 18px;
  border:0;border-radius:var(--radius-btn);
  background:var(--ink);color:#fff;font-size:14px;font-weight:600;cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease);
}
.nav-search button:hover{background:var(--green);color:var(--ink);}
.nav-links{display:flex;align-items:center;gap:6px;flex:0 0 auto;}
.nav-links a{
  padding:9px 12px;border-radius:8px;font-size:15px;color:var(--ink);
  white-space:nowrap;transition:background .22s var(--ease),color .22s var(--ease);
}
.nav-links a:hover{background:var(--soft);color:var(--green-deep);}
.nav-links a.active{color:var(--green-deep);background:var(--green-soft);}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);
  background:var(--ink);color:#fff !important;font-weight:600;font-size:15px;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.nav-cta:hover{background:var(--green);color:var(--ink) !important;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  border:1px solid var(--line);background:#fff;cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;}
.nav-drawer{display:none;}

@media(max-width:1023px){
  .nav-inner{height:64px;gap:14px;flex-wrap:wrap;}
  .nav-toggle{display:flex;margin-left:auto;}
  .nav-search{order:3;flex:1 1 100%;max-width:none;height:46px;display:none;}
  .nav-search.is-open{display:flex;margin-bottom:12px;}
  .nav-links{
    display:none;order:4;flex:1 1 100%;flex-direction:column;align-items:stretch;
    gap:2px;padding:8px 0 14px;border-top:1px solid var(--line);
  }
  .nav-links.is-open{display:flex;}
  .nav-links a{padding:13px 10px;font-size:16px;}
  .nav-cta{display:none;}
}

/* ---------- Breadcrumb ---------- */
.crumb-bar{
  background:var(--white);border-bottom:1px solid var(--line);
}
.crumb{padding:16px 0;font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--green-deep);}
.crumb .sep{color:#C3CBC6;}
.crumb .current{color:var(--ink);}

/* ---------- Article hero ---------- */
.article-hero{
  position:relative;padding:64px 0 46px;
  background-image:linear-gradient(rgba(14,26,22,.90),rgba(14,26,22,.68)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  color:#fff;
}
.article-hero h1{
  color:#fff;
  font-size:clamp(1.85rem,3.6vw,2.9rem);
  line-height:1.32;
  max-width:960px;
}
.article-hero .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--green);margin-bottom:18px;font-weight:600;
}
.article-hero .eyebrow::before{content:"";width:22px;height:2px;background:var(--green);display:block;}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  margin-top:22px;font-size:13.5px;color:rgba(255,255,255,.78);
}
.meta-row .bar{width:1px;height:14px;background:rgba(255,255,255,.28);}
.meta-chip{
  display:inline-flex;align-items:center;
  padding:4px 12px;border-radius:999px;
  background:rgba(47,191,155,.18);color:#8FE7CF;font-size:12.5px;font-weight:600;
}
.article-cover{
  margin-top:36px;border-radius:var(--radius-card);overflow:hidden;
  border:1px solid rgba(255,255,255,.14);
  box-shadow:var(--shadow-card);
}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}

/* ---------- Layout ---------- */
.main-wrap{padding:56px 0 40px;}
.layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:48px;align-items:start;
}
@media(max-width:1199px){
  .layout{grid-template-columns:minmax(0,1fr);gap:32px;}
  .toc-col{display:none;}
}
.panel{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
}
.article-body{padding:44px 48px 52px;}
@media(max-width:640px){.article-body{padding:26px 20px 32px;}}

/* ---------- Prose ---------- */
.prose{font-size:17.5px;line-height:1.85;color:var(--text);max-width:800px;}
.prose>*:first-child{margin-top:0;}
.prose p{margin:0 0 1.2em;}
.prose h2{
  font-size:clamp(1.35rem,2.2vw,1.62rem);
  margin:2.1em 0 .75em;padding-left:14px;
  border-left:4px solid var(--green);line-height:1.4;
  scroll-margin-top:100px;
}
.prose h3{
  font-size:1.22rem;margin:1.7em 0 .6em;
  display:flex;align-items:center;gap:10px;
}
.prose h3::before{
  content:"";width:8px;height:8px;background:var(--clay);
  display:block;border-radius:2px;flex:0 0 auto;
}
.prose h4{font-size:1.05rem;margin:1.4em 0 .5em;color:var(--ink-2);}
.prose ul,.prose ol{margin:0 0 1.3em;padding-left:2px;}
.prose li{position:relative;padding-left:20px;margin-bottom:.55em;}
.prose li::before{
  content:"";position:absolute;left:2px;top:.72em;
  width:6px;height:6px;background:var(--green);border-radius:1px;
}
.prose ol{counter-reset:item;}
.prose ol li{counter-increment:item;}
.prose ol li::before{
  content:counter(item);width:auto;height:auto;background:none;
  color:var(--clay);font-weight:700;font-size:13px;top:0;left:0;
  font-variant-numeric:tabular-nums;
}
.prose blockquote{
  margin:1.6em 0;padding:18px 22px;
  background:var(--sand);border-left:3px solid var(--green);
  border-radius:0 12px 12px 0;color:var(--ink-2);
}
.prose blockquote p:last-child{margin-bottom:0;}
.prose img{border-radius:12px;margin:1.4em auto;}
.prose table{
  width:100%;border-collapse:collapse;margin:1.6em 0;
  font-size:15px;border-radius:12px;overflow:hidden;
}
.prose thead th{
  background:var(--ink);color:#fff;text-align:left;
  padding:12px 14px;font-weight:600;border:0;
}
.prose tbody td{padding:12px 14px;border:0;border-bottom:1px solid var(--line);}
.prose tbody tr:nth-child(even){background:var(--soft);}
.prose code{
  background:var(--soft);padding:2px 7px;border-radius:6px;
  font-size:.92em;color:var(--green-deep);
}
.prose a{color:var(--green-deep);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px;}
.prose a:hover{text-decoration-thickness:2px;}
@media(max-width:640px){.prose{font-size:16px;}}

/* ---------- Empty state ---------- */
.empty-state{
  min-height:220px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;text-align:center;gap:14px;
  padding:40px 24px;
}
.empty-state .icon{
  width:52px;height:52px;border-radius:50%;
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
  color:var(--muted);
}
.empty-state p{color:var(--muted);font-size:15px;margin:0;}

/* ---------- TOC ---------- */
.toc-col{position:sticky;top:100px;}
.toc{padding:24px 22px 26px;}
.toc h4{
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);font-family:var(--sans);font-weight:600;margin-bottom:14px;
}
.toc ol{display:flex;flex-direction:column;gap:2px;}
.toc a{
  display:block;padding:8px 10px;border-radius:8px;
  font-size:14px;color:var(--muted);line-height:1.5;
  border-left:2px solid transparent;transition:all .22s var(--ease);
}
.toc a:hover{background:var(--soft);color:var(--green-deep);}
.toc a.is-active{color:var(--green-deep);border-left-color:var(--green);background:var(--green-soft);}
.toc-empty{font-size:14px;color:var(--muted);margin:0;}

/* ---------- Post nav ---------- */
.post-nav{
  display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:36px;
}
@media(max-width:768px){.post-nav{grid-template-columns:1fr;}}
.post-nav a{
  display:block;padding:22px 24px;border-radius:var(--radius-card);
  background:var(--white);border:1px solid var(--line);box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.post-nav a:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#CFE7DF;}
.post-nav .label{font-size:12.5px;color:var(--muted);letter-spacing:.06em;}
.post-nav .title{display:block;margin-top:8px;font-family:var(--serif);font-size:17px;color:var(--ink);line-height:1.5;}

/* ---------- Section heads ---------- */
.section{padding:64px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(1.5rem,2.4vw,2rem);}
.section-head p{color:var(--muted);margin:10px 0 0;font-size:15px;max-width:640px;}
.link-more{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--green-deep);}
.link-more svg{transition:transform .22s var(--ease);}
.link-more:hover svg{transform:translateX(6px);}

/* ---------- Cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;}
@media(max-width:1023px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media(max-width:639px){.card-grid{grid-template-columns:1fr;}}
.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--white);border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#CFE7DF;}
.card .thumb{position:relative;overflow:hidden;}
.card .thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s var(--ease);}
.card:hover .thumb img{transform:scale(1.04);}
.card .body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto;}
.card h3{font-size:17.5px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card p{font-size:14.5px;color:var(--muted);line-height:1.75;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card .foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:6px;}
.badge{
  display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;
  background:var(--green-soft);color:var(--green-deep);font-size:12.5px;font-weight:600;
}
.badge.hot{background:#FBE7DC;color:var(--clay);}
.date{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--ink);color:#fff;border-radius:var(--radius-card);
  padding:46px 48px;display:grid;grid-template-columns:minmax(0,1fr) auto;
  align-items:center;gap:32px;
  box-shadow:var(--shadow-card);
}
.cta-band h2{color:#fff;font-size:clamp(1.4rem,2.3vw,1.9rem);}
.cta-band p{color:rgba(255,255,255,.72);margin:12px 0 0;font-size:15px;max-width:560px;}
@media(max-width:768px){.cta-band{grid-template-columns:1fr;padding:32px 24px;}}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 26px;border-radius:var(--radius-btn);font-weight:600;font-size:15px;
  border:1px solid transparent;cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.btn-primary{background:var(--ink);color:#fff;}
.btn-primary:hover{background:var(--green);color:var(--ink);}
.btn-light{background:var(--green);color:var(--ink);}
.btn-light:hover{background:#fff;color:var(--ink);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{background:var(--green-soft);border-color:var(--green);color:var(--green-deep);}
.btn-ghost.on-dark{color:#fff;border-color:rgba(255,255,255,.32);}
.btn-ghost.on-dark:hover{background:rgba(255,255,255,.10);color:#fff;}
.btn svg{transition:transform .22s var(--ease);}
.btn:hover svg{transform:translateX(6px);}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 26px;margin-top:24px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:36px;}
@media(max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;gap:30px;}}
@media(max-width:639px){.footer-grid{grid-template-columns:1fr;}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{background:var(--green);color:var(--ink);}
.footer-brand .brand-name{color:#fff;font-family:var(--serif);font-size:17px;}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;font-family:var(--sans);letter-spacing:.02em;}
.footer-col p{font-size:14px;line-height:1.8;margin:0;color:rgba(255,255,255,.62);}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a,.footer-col span{font-size:14px;color:rgba(255,255,255,.68);transition:color .22s var(--ease),transform .22s var(--ease);display:inline-block;}
.footer-col a:hover{color:var(--green);transform:translateX(2px);}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}
.to-top{
  position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;
  background:var(--ink);color:#fff;border:0;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;transition:opacity .3s var(--ease),background .22s var(--ease);
  box-shadow:var(--shadow-card);z-index:70;
}
.to-top.is-visible{opacity:1;pointer-events:auto;}
.to-top:hover{background:var(--green);color:var(--ink);}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s 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;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --ink:#0E1A16;
  --sand:#F6F3ED;
  --white:#FFFFFF;
  --jade:#2FBF9B;
  --clay:#C8622F;
  --text:#1B2320;
  --muted:#5D6B65;
  --line:#E2DCD0;
  --soft:#EFEAE1;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-input:12px;
  --shadow-card:0 1px 2px rgba(14,26,22,.04), 0 14px 34px -20px rgba(14,26,22,.20);
  --shadow-hover:0 20px 44px -22px rgba(14,26,22,.28);
  --ease:220ms cubic-bezier(.2,.7,.3,1);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;padding:0;
  font-family:var(--sans);
  font-size:16px;line-height:1.8;
  color:var(--text);
  background:var(--sand);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease);}
h1,h2,h3,h4,h5{margin:0;font-family:var(--serif);font-weight:600;color:var(--ink);letter-spacing:-0.02em;line-height:1.3;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;}
:focus-visible{outline:3px solid rgba(47,191,155,.45);outline-offset:2px;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.section--tight{padding:64px 0;}
.section--soft{background:var(--soft);}
.section--white{background:var(--white);}
.section--dark{background:var(--ink);color:rgba(255,255,255,.82);}
.num{font-variant-numeric:tabular-nums;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(140%) blur(10px);
  -webkit-backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 12px 28px -26px rgba(14,26,22,.6);}
.header-inner{display:flex;align-items:center;gap:22px;min-height:76px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;background:var(--ink);color:#fff;
  display:grid;place-items:center;font-family:var(--serif);font-size:14px;letter-spacing:.04em;
}
.brand-name{font-family:var(--serif);font-size:19px;font-weight:600;color:var(--ink);white-space:nowrap;}
.nav-search{
  flex:1 1 auto;max-width:640px;position:relative;
  display:flex;align-items:center;gap:8px;
  height:52px;padding:0 6px 0 16px;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-input);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.nav-search:focus-within{border-color:var(--jade);box-shadow:0 0 0 3px rgba(47,191,155,.16);}
.nav-search svg{flex:0 0 auto;width:22px;height:22px;stroke:var(--muted);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.nav-search input{
  flex:1 1 auto;min-width:0;height:100%;border:0;background:transparent;
  font-size:15px;color:var(--text);
}
.nav-search input::placeholder{color:#8C978F;}
.nav-search input:focus{outline:none;}
.search-btn{
  flex:0 0 auto;height:40px;padding:0 18px;border:0;border-radius:var(--radius-btn);
  background:var(--ink);color:#fff;font-size:14px;font-weight:600;letter-spacing:.02em;
  transition:background-color var(--ease),color var(--ease);
}
.search-btn:hover{background:var(--jade);color:var(--ink);}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-links a{
  position:relative;padding:10px 12px;border-radius:10px;font-size:15px;color:var(--text);
  white-space:nowrap;
}
.nav-links a:hover{color:var(--jade);background:rgba(47,191,155,.08);}
.nav-links a.active{color:var(--ink);font-weight:600;}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;background:var(--jade);
}
.nav-cta{flex:0 0 auto;}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:var(--white);
}
.nav-toggle svg{width:22px;height:22px;stroke:var(--ink);stroke-width:1.8;fill:none;stroke-linecap:round;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 26px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;font-family:var(--sans);
  transition:background-color var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn-primary{background:var(--ink);color:#fff;}
.btn-primary:hover{background:var(--jade);color:var(--ink);}
.btn-outline{background:var(--white);color:var(--ink);border-color:var(--line);}
.btn-outline:hover{border-color:var(--jade);background:rgba(47,191,155,.10);color:var(--ink);}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.42);}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff;}
.btn .arrow{transition:transform var(--ease);}
.btn:hover .arrow{transform:translateX(6px);}
.btn:active{transform:translateY(1px);}

/* ---------- Page hero ---------- */
.page-hero{
  position:relative;color:#fff;padding:128px 0 82px;
  background-image:linear-gradient(rgba(14,26,22,.88),rgba(14,26,22,.62)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.68);}
.breadcrumb a{color:rgba(255,255,255,.68);}
.breadcrumb a:hover{color:var(--jade);}
.breadcrumb .sep{opacity:.5;}
.breadcrumb .current{color:#fff;}
.page-hero h1{color:#fff;font-size:clamp(2rem,4vw,3.15rem);margin:22px 0 0;max-width:900px;}
.page-hero .hero-lead{
  margin-top:20px;max-width:760px;font-size:17px;line-height:1.85;color:rgba(255,255,255,.84);
}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.hero-chips span{
  padding:7px 16px;border-radius:999px;font-size:13px;letter-spacing:.02em;
  border:1px solid rgba(255,255,255,.28);color:rgba(255,255,255,.9);background:rgba(255,255,255,.06);
}

/* ---------- Section head ---------- */
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:40px;}
.section-label{
  display:block;font-size:12px;letter-spacing:.18em;color:var(--jade);font-weight:700;margin-bottom:14px;
}
.section-head h2{font-size:clamp(1.6rem,2.6vw,2.4rem);}
.section-head p{margin-top:12px;max-width:640px;color:var(--muted);font-size:16px;}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--ink);font-weight:600;font-size:15px;border-bottom:1px solid var(--line);padding-bottom:2px;}
.text-link:hover{color:var(--jade);border-color:var(--jade);}
.text-link:hover .arrow{transform:translateX(6px);}
.text-link .arrow{transition:transform var(--ease);}

/* ---------- Cards ---------- */
.card{
  display:flex;flex-direction:column;height:100%;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);overflow:hidden;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#D6CFC0;}
.card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--soft);}
.card-media img{width:100%;height:100%;object-fit:cover;}
.card-body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto;}
.card-body h3{font-size:1.22rem;}
.card-body p{color:var(--muted);font-size:15px;line-height:1.8;}
.card-foot{margin-top:auto;padding-top:6px;}
.banner-card .card-body{padding:24px 26px 28px;}

.tag{
  display:inline-flex;align-items:center;padding:5px 13px;border-radius:999px;
  background:rgba(47,191,155,.13);color:#1E7E66;font-size:12.5px;font-weight:600;letter-spacing:.02em;
}
.tag--clay{background:rgba(200,98,47,.13);color:#A44E23;}

/* ---------- Long list ---------- */
.topic-list{display:flex;flex-direction:column;gap:18px;}
.topic-item{
  display:flex;gap:22px;align-items:center;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:18px;box-shadow:var(--shadow-card);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.topic-item:hover{transform:translateX(6px);box-shadow:var(--shadow-hover);border-color:#D6CFC0;}
.topic-thumb{flex:0 0 208px;aspect-ratio:16/10;border-radius:12px;overflow:hidden;background:var(--soft);}
.topic-thumb img{width:100%;height:100%;object-fit:cover;}
.topic-main{flex:1 1 auto;min-width:0;}
.topic-main h3{font-size:1.12rem;margin-bottom:8px;}
.topic-main p{color:var(--muted);font-size:15px;}
.topic-meta{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:10px;}
.topic-side{flex:0 0 auto;text-align:right;color:var(--muted);font-size:13.5px;line-height:1.7;}
.topic-side strong{display:block;font-family:var(--serif);font-size:1.35rem;color:var(--ink);font-variant-numeric:tabular-nums;}

/* ---------- Steps ---------- */
.step-card{
  height:100%;background:var(--white);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 24px 28px;box-shadow:var(--shadow-card);
  transition:transform var(--ease),box-shadow var(--ease);
}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.step-no{
  display:inline-grid;place-items:center;width:34px;height:34px;border-radius:9px;
  background:rgba(200,98,47,.13);color:var(--clay);
  font-family:var(--serif);font-size:15px;font-weight:600;margin-bottom:18px;
}
.step-card h3{font-size:1.12rem;margin-bottom:10px;}
.step-card p{color:var(--muted);font-size:15px;}

/* ---------- Stats band ---------- */
.stats-band{padding:62px 0;}
.stats-grid{display:flex;flex-wrap:wrap;gap:0;}
.stat{
  flex:1 1 25%;min-width:200px;padding:10px 28px;position:relative;
}
.stat + .stat::before{
  content:"";position:absolute;left:0;top:12%;bottom:12%;width:1px;background:rgba(255,255,255,.16);
}
.stat strong{
  display:block;font-family:var(--serif);font-size:clamp(2rem,3.4vw,2.7rem);
  color:#fff;line-height:1.1;font-variant-numeric:tabular-nums;
}
.stat span{display:block;margin-top:10px;font-size:14px;color:rgba(255,255,255,.66);}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:920px;}
.faq-item{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease);}
.faq-item[open]{border-color:#D6CFC0;box-shadow:var(--shadow-card);}
.faq-item summary{
  display:flex;align-items:center;gap:18px;
  padding:20px 24px;cursor:pointer;list-style:none;
  font-family:var(--serif);font-size:18px;color:var(--ink);line-height:1.7;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--jade);}
.faq-no{flex:0 0 auto;font-family:var(--serif);font-size:14px;color:var(--clay);font-variant-numeric:tabular-nums;}
.faq-item summary::after{
  content:"+";margin-left:auto;font-family:var(--sans);font-size:22px;font-weight:400;color:var(--muted);line-height:1;
}
.faq-item[open] summary::after{content:"−";color:var(--jade);}
.faq-body{padding:0 24px 24px 66px;color:var(--muted);font-size:15.5px;line-height:1.85;}
.faq-body p + p{margin-top:10px;}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--ink);color:rgba(255,255,255,.8);border-radius:0;
}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:32px;}
.cta-inner h2{color:#fff;font-size:clamp(1.5rem,2.4vw,2.15rem);max-width:620px;}
.cta-inner p{margin-top:14px;max-width:620px;color:rgba(255,255,255,.72);}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.7);padding:72px 0 30px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.1);color:#fff;}
.footer-brand .brand-name{font-family:var(--serif);font-size:18px;color:#fff;}
.footer-col p{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.62);max-width:340px;}
.footer-col h4{
  color:#fff;font-size:15px;letter-spacing:.04em;margin-bottom:18px;font-family:var(--sans);font-weight:600;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col li{font-size:14.5px;color:rgba(255,255,255,.62);}
.footer-col a{color:rgba(255,255,255,.7);display:inline-block;transition:color var(--ease),transform var(--ease);}
.footer-col a:hover{color:var(--jade);transform:translateX(2px);}
.footer-bottom{
  margin-top:52px;padding-top:24px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13.5px;color:rgba(255,255,255,.5);
}

/* ---------- Back to top ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:70;
  width:46px;height:46px;border-radius:50%;border:0;background:var(--ink);color:#fff;
  display:grid;place-items:center;opacity:0;pointer-events:none;
  transition:opacity var(--ease),transform var(--ease),background-color var(--ease);
  box-shadow:0 14px 30px -16px rgba(14,26,22,.7);
}
.to-top.show{opacity:1;pointer-events:auto;}
.to-top:hover{background:var(--jade);color:var(--ink);transform:translateY(-3px);}
.to-top svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 620ms cubic-bezier(.2,.7,.3,1),transform 620ms cubic-bezier(.2,.7,.3,1);}
.reveal.in{opacity:1;transform:none;}

/* ---------- Responsive ---------- */
@media (min-width:1440px){
  .container{max-width:1280px;}
}
@media (max-width:1023px){
  .header-inner{flex-wrap:wrap;gap:12px;min-height:64px;padding:10px 0;}
  .brand{order:1;flex:1 1 auto;}
  .brand-name{font-size:17px;}
  .nav-toggle{order:2;display:inline-flex;}
  .nav-search{order:3;flex:1 1 100%;max-width:none;height:46px;padding-left:14px;}
  .search-btn{height:36px;padding:0 14px;}
  .nav-links{
    order:4;flex:1 1 100%;display:none;flex-direction:column;align-items:stretch;
    gap:2px;margin-left:0;padding:8px 0 4px;border-top:1px solid var(--line);
  }
  .header-inner.is-open .nav-links{display:flex;}
  .nav-links a{padding:12px 14px;}
  .nav-links a.active::after{display:none;}
  .nav-links a.active{background:rgba(47,191,155,.12);color:var(--ink);}
  .nav-cta{order:5;flex:1 1 100%;justify-content:center;display:none;}
  .header-inner.is-open .nav-cta{display:inline-flex;margin-bottom:10px;}
  .page-hero{padding:56px 0 56px;}
  .section{padding:56px 0;}
  .section--tight{padding:48px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .stat{flex:1 1 50%;padding:16px 20px;}
  .stat + .stat::before{display:none;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .page-hero{padding:44px 0 48px;}
  .page-hero h1{font-size:clamp(1.7rem,6.4vw,2.2rem);}
  .page-hero .hero-lead{font-size:15.5px;}
  .topic-item{flex-direction:column;align-items:flex-start;gap:16px;padding:16px;}
  .topic-item:hover{transform:translateY(-4px);}
  .topic-thumb{flex:0 0 auto;width:100%;}
  .topic-side{text-align:left;}
  .topic-side strong{display:inline;}
  .faq-item summary{font-size:16.5px;padding:18px;gap:12px;}
  .faq-body{padding:0 18px 20px 18px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;justify-content:center;}
  .stat{flex:1 1 100%;padding:14px 0;}
}
@media (max-width:520px){
  .brand-name{font-size:15.5px;}
  .section-head{margin-bottom:28px;}
  .to-top{right:16px;bottom:16px;}
}
@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1!important;transform:none!important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --ink:#0E1A16;
  --ink-soft:#1B2320;
  --muted:#5D6B65;
  --bg:#F6F3ED;
  --surface:#FFFFFF;
  --surface-2:#EFEAE1;
  --line:#E2DCD0;
  --accent:#2FBF9B;
  --accent-soft:#E4F6F0;
  --accent-deep:#177A62;
  --clay:#C8622F;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(14,26,22,.04),0 14px 34px -20px rgba(14,26,22,.20);
  --shadow-hover:0 20px 44px -22px rgba(14,26,22,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1240px;
  --section-y:88px;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,"Segoe UI",Roboto,sans-serif;
}

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

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

body{
  margin:0;
  background:var(--bg);
  color:var(--ink-soft);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img{max-width:100%;display:block;height:auto;}
a{color:var(--accent-deep);text-decoration:none;transition:color 220ms var(--ease),background-color 220ms var(--ease),border-color 220ms var(--ease),transform 220ms var(--ease);}
a:hover{color:var(--accent);}
button{font-family:inherit;}

h1,h2,h3,h4{
  font-family:var(--serif);
  color:var(--ink);
  font-weight:600;
  letter-spacing:-0.02em;
  margin:0;
  line-height:1.28;
}

h1{font-size:clamp(2.1rem,4.6vw,3.6rem);}
h2{font-size:clamp(1.7rem,2.6vw,2.5rem);}
h3{font-size:1.25rem;line-height:1.45;}
h4{font-size:1.0625rem;line-height:1.5;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}

::selection{background:var(--accent);color:#06231B;}

:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:3px;
  border-radius:4px;
}

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

.section{padding:var(--section-y) 0;}
.section--tight{padding-top:56px;}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:40px;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--accent-deep);
  font-weight:600;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--accent);
  display:inline-block;
}

.section-lead{
  color:var(--muted);
  max-width:640px;
  font-size:16.5px;
}

.text-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:600;
  color:var(--ink);
  border-bottom:2px solid transparent;
  padding-bottom:2px;
}
.text-link .arrow{transition:transform 220ms var(--ease);display:inline-block;}
.text-link:hover{color:var(--accent-deep);border-bottom-color:var(--accent);}
.text-link:hover .arrow{transform:translateX(6px);}

/* 按钮 */
.button,
button.button{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:14px 26px;
  border-radius:var(--radius-sm);
  font-size:15.5px;
  font-weight:600;
  line-height:1.2;
  background:var(--ink);
  color:#F7F5F0;
  border:1px solid var(--ink);
  cursor:pointer;
  transition:all 220ms var(--ease);
  margin:0;
}
.button:hover,.button:focus{background:var(--accent);border-color:var(--accent);color:#06231B;}
.button.ghost{background:transparent;color:var(--ink);border-color:var(--line);}
.button.ghost:hover{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-deep);}
.button.ghost-light{background:transparent;color:#F7F5F0;border-color:rgba(247,245,240,.45);}
.button.ghost-light:hover{background:rgba(47,191,155,.16);border-color:var(--accent);color:#FFFFFF;}
.button .arrow{transition:transform 220ms var(--ease);}
.button:hover .arrow{transform:translateX(6px);}

/* 徽章 */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:999px;
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.02em;
  background:var(--accent-soft);
  color:var(--accent-deep);
  border:1px solid rgba(47,191,155,.28);
}
.badge--hot{background:#FBE9DF;color:var(--clay);border-color:rgba(200,98,47,.3);}
.badge--plain{background:var(--surface-2);color:var(--muted);border-color:var(--line);}

/* 顶部导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 10px 30px -24px rgba(14,26,22,.35);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:76px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  flex:0 0 auto;
}
.brand-mark{
  width:38px;
  height:38px;
  border-radius:11px;
  background:var(--ink);
  color:#F7F5F0;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-family:var(--serif);
  font-size:17px;
  font-weight:600;
  letter-spacing:.02em;
}
.brand-text{
  display:flex;
  flex-direction:column;
  line-height:1.15;
}
.brand-name{
  font-family:var(--serif);
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  letter-spacing:-0.01em;
}
.brand-sub{
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}

.search-form{
  flex:1 1 auto;
  max-width:640px;
  display:flex;
  align-items:center;
  gap:8px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:0 6px 0 14px;
  height:52px;
  transition:border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.search-form:focus-within{
  border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(47,191,155,.16);
}
.search-form svg{flex:0 0 auto;color:var(--muted);}
.search-form input{
  flex:1 1 auto;
  border:0;
  background:transparent;
  height:48px;
  font-size:15px;
  color:var(--ink-soft);
  outline:none;
  min-width:0;
}
.search-form input::placeholder{color:#9AA6A0;}
.search-form .button{padding:0 18px;height:40px;font-size:14.5px;}

.nav-links{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
}
.nav-links a{
  padding:9px 12px;
  border-radius:var(--radius-sm);
  font-size:15px;
  font-weight:500;
  color:var(--ink-soft);
  white-space:nowrap;
}
.nav-links a:hover{background:var(--surface-2);color:var(--ink);}
.nav-links a.active{color:var(--accent-deep);background:var(--accent-soft);font-weight:600;}
.nav-cta{
  margin-left:8px;
  padding:12px 20px;
  font-size:14.5px;
}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:var(--radius-sm);
  border:1px solid var(--line);
  background:var(--surface);
  cursor:pointer;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
  padding:0;
  margin-left:auto;
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  background:var(--ink);
  border-radius:2px;
  transition:transform 220ms var(--ease),opacity 220ms var(--ease);
}

/* 移动抽屉 */
.nav-drawer{
  position:fixed;
  inset:0;
  background:rgba(255,255,255,.98);
  z-index:90;
  padding:20px 24px 40px;
  transform:translateY(-12px);
  opacity:0;
  pointer-events:none;
  transition:opacity 220ms var(--ease),transform 220ms var(--ease);
  display:flex;
  flex-direction:column;
  gap:18px;
  overflow-y:auto;
}
.nav-drawer.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{
  width:42px;height:42px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:var(--surface);
  font-size:22px;line-height:1;color:var(--ink);cursor:pointer;
}
.drawer-links{display:flex;flex-direction:column;gap:6px;margin-top:6px;}
.drawer-links a{
  padding:14px 16px;
  border-radius:var(--radius-md);
  background:var(--surface-2);
  font-size:16px;
  font-weight:600;
  color:var(--ink);
}
.drawer-links a.active{background:var(--accent-soft);color:var(--accent-deep);}
.drawer-cta{margin-top:8px;}

/* 页面横幅 */
.page-hero{
  position:relative;
  color:#F7F5F0;
  background-image:linear-gradient(105deg,rgba(14,26,22,.90) 0%,rgba(14,26,22,.62) 62%,rgba(14,26,22,.48) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;
  right:-120px;bottom:-160px;
  width:460px;height:460px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(47,191,155,.30),transparent 68%);
  pointer-events:none;
}
.page-hero-inner{
  position:relative;
  z-index:2;
  padding:34px 0 88px;
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:rgba(247,245,240,.68);
  margin-bottom:36px;
}
.breadcrumb a{color:rgba(247,245,240,.82);}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb .sep{opacity:.5;}
.breadcrumb .current{color:#F7F5F0;}

.page-hero h1{
  color:#FFFFFF;
  max-width:900px;
  margin-bottom:20px;
}
.page-hero h1 .brand-em{
  display:block;
  font-size:.5em;
  letter-spacing:.06em;
  color:var(--accent);
  margin-bottom:10px;
  font-weight:600;
}
.page-hero .hero-lead{
  max-width:680px;
  color:rgba(247,245,240,.82);
  font-size:17px;
  line-height:1.85;
  margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* 数据条 */
.stat-band{
  background:var(--ink);
  color:#F7F5F0;
  border-radius:var(--radius-lg);
  padding:38px 30px;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  box-shadow:var(--shadow);
}
.stat-item{
  padding:0 26px;
  border-left:1px solid rgba(247,245,240,.14);
}
.stat-item:first-child{border-left:0;padding-left:0;}
.stat-num{
  font-family:var(--serif);
  font-size:clamp(1.9rem,3vw,2.6rem);
  font-weight:600;
  line-height:1.1;
  font-variant-numeric:tabular-nums;
  color:#FFFFFF;
}
.stat-num small{font-size:.5em;margin-left:4px;color:var(--accent);}
.stat-label{
  font-size:13.5px;
  color:rgba(247,245,240,.66);
  margin-top:8px;
  letter-spacing:.02em;
}

/* 模块区：左目录 + 右卡片 */
.module-layout{padding-top:calc(var(--section-y) - 24px);}
.toc-panel{
  position:sticky;
  top:104px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:26px 22px;
  box-shadow:var(--shadow);
}
.toc-panel h4{
  font-size:15px;
  letter-spacing:.04em;
  margin-bottom:14px;
  padding-bottom:14px;
  border-bottom:1px solid var(--line);
}
.toc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 12px;
  border-radius:var(--radius-sm);
  font-size:14.5px;
  color:var(--ink-soft);
  border-left:3px solid transparent;
}
.toc-list a .idx{
  font-family:var(--serif);
  font-size:12.5px;
  color:var(--muted);
  font-variant-numeric:tabular-nums;
}
.toc-list a:hover{background:var(--surface-2);color:var(--ink);}
.toc-list a.is-current{
  background:var(--accent-soft);
  border-left-color:var(--accent);
  color:var(--accent-deep);
  font-weight:600;
}
.toc-note{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:13.5px;
  color:var(--muted);
  line-height:1.75;
}

.func-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow);
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease);
  height:100%;
  display:flex;
  flex-direction:column;
  margin-bottom:28px;
}
.func-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.func-card .thumb{
  aspect-ratio:16/10;
  overflow:hidden;
  background:var(--surface-2);
}
.func-card .thumb img{
  width:100%;height:100%;object-fit:cover;
  transition:transform 420ms var(--ease);
}
.func-card:hover .thumb img{transform:scale(1.04);}
.func-card .body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.func-card h3{font-size:1.1875rem;}
.func-card p{font-size:15px;color:var(--muted);line-height:1.75;margin:0;}
.func-card .path{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  color:var(--accent-deep);
  background:var(--accent-soft);
  border-radius:var(--radius-sm);
  padding:8px 12px;
  margin-top:auto;
  font-weight:600;
}
.func-card .path svg{flex:0 0 auto;}

/* 流程步骤 */
.flow{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:28px;
}
.flow-step{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:28px 24px;
  box-shadow:var(--shadow);
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease);
}
.flow-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.flow-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:34px;height:34px;
  border-radius:9px;
  background:var(--clay);
  color:#FFF6F0;
  font-family:var(--serif);
  font-size:15px;
  font-weight:600;
  margin-bottom:16px;
}
.flow-step h3{font-size:1.0625rem;margin-bottom:8px;}
.flow-step p{font-size:14.5px;color:var(--muted);line-height:1.75;margin:0;}

/* 交替图文 */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
  padding:44px 0;
  border-bottom:1px solid var(--line);
}
.split:last-child{border-bottom:0;padding-bottom:0;}
.split:first-child{padding-top:0;}
.split.reverse .split-media{order:2;}
.split-media{
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow);
  aspect-ratio:16/10;
  background:var(--surface-2);
}
.split-media img{width:100%;height:100%;object-fit:cover;}
.split-text h3{font-size:1.4rem;margin-bottom:14px;}
.split-text p{color:var(--muted);font-size:15.5px;}
.square-list{
  list-style:none;
  margin:18px 0 22px;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:12px;
}
.square-list li{
  position:relative;
  padding-left:22px;
  font-size:15px;
  color:var(--ink-soft);
}
.square-list li::before{
  content:"";
  position:absolute;
  left:0;top:.62em;
  width:8px;height:8px;
  background:var(--accent);
  border-radius:2px;
}

/* FAQ */
.faq-wrap{max-width:920px;margin:0 auto;}
.faq-item{
  border:1px solid var(--line);
  background:var(--surface);
  border-radius:var(--radius-lg);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.faq-item.is-open{border-color:rgba(47,191,155,.5);box-shadow:var(--shadow);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  gap:18px;
  min-height:60px;
  padding:18px 24px;
  background:transparent;
  border:0;
  text-align:left;
  cursor:pointer;
  font-family:var(--sans);
}
.faq-q .no{
  font-family:var(--serif);
  font-size:13.5px;
  color:var(--accent-deep);
  font-variant-numeric:tabular-nums;
  flex:0 0 auto;
}
.faq-q .q-text{
  flex:1 1 auto;
  font-size:18px;
  line-height:1.7;
  color:var(--ink);
  font-weight:600;
}
.faq-q .sign{
  flex:0 0 auto;
  width:22px;height:22px;
  position:relative;
}
.faq-q .sign::before,
.faq-q .sign::after{
  content:"";
  position:absolute;
  background:var(--accent-deep);
  border-radius:2px;
  transition:transform 260ms var(--ease),opacity 260ms var(--ease);
}
.faq-q .sign::before{left:50%;top:4px;width:2px;height:14px;transform:translateX(-50%);}
.faq-q .sign::after{top:50%;left:4px;height:2px;width:14px;transform:translateY(-50%);}
.faq-item.is-open .sign::before{transform:translateX(-50%) rotate(90deg);opacity:0;}
.faq-item.is-open .sign::after{background:var(--accent);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height 260ms var(--ease);
}
.faq-a-inner{
  padding:0 24px 24px 60px;
  color:var(--muted);
  font-size:15.5px;
  line-height:1.85;
}

/* CTA */
.cta-band{
  background:var(--ink);
  color:#F7F5F0;
  border-radius:var(--radius-lg);
  padding:48px 44px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-90px;top:-90px;
  width:320px;height:320px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(47,191,155,.28),transparent 70%);
}
.cta-band > *{position:relative;z-index:2;}
.cta-band h2{color:#FFFFFF;font-size:clamp(1.5rem,2.3vw,2.1rem);margin-bottom:10px;}
.cta-band p{color:rgba(247,245,240,.72);margin:0;max-width:620px;font-size:15.5px;}

/* 页脚 */
.site-footer{
  background:var(--ink);
  color:rgba(247,245,240,.72);
  padding:72px 0 28px;
  margin-top:var(--section-y);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:44px;
  border-bottom:1px solid rgba(247,245,240,.14);
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:16px;
}
.footer-brand .brand-mark{background:var(--accent);color:#06231B;}
.footer-brand .brand-name{color:#FFFFFF;font-family:var(--serif);font-size:17.5px;}
.footer-col p{font-size:14px;line-height:1.85;color:rgba(247,245,240,.62);margin:0;max-width:340px;}
.footer-col h4{
  color:#FFFFFF;
  font-size:15px;
  margin-bottom:16px;
  font-family:var(--sans);
  letter-spacing:.04em;
}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;}
.footer-col ul a,
.footer-col ul span{
  color:rgba(247,245,240,.7);
  font-size:14.5px;
  display:inline-block;
  transition:color 220ms var(--ease),transform 220ms var(--ease);
}
.footer-col ul a:hover{color:var(--accent);transform:translateX(2px);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  padding-top:24px;
  font-size:13px;
  color:rgba(247,245,240,.5);
}

/* 返回顶部 */
.to-top{
  position:fixed;
  right:24px;
  bottom:24px;
  width:46px;height:46px;
  border-radius:50%;
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--ink);
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  box-shadow:var(--shadow);
  opacity:0;
  pointer-events:none;
  transform:translateY(8px);
  transition:opacity 220ms var(--ease),transform 220ms var(--ease),background-color 220ms var(--ease);
  z-index:70;
}
.to-top.is-visible{opacity:1;pointer-events:auto;transform:translateY(0);}
.to-top:hover{background:var(--accent-soft);}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 620ms var(--ease),transform 620ms var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* 网格间距补偿 */
.module-layout .grid-x,
.func-grid{margin-left:-14px;margin-right:-14px;}
.module-layout .cell,
.func-grid > .cell{padding-left:14px;padding-right:14px;}

/* 响应式 */
@media screen and (max-width:1439px){
  :root{--container:1240px;}
}
@media screen and (min-width:1440px){
  :root{--container:1280px;}
}

@media screen and (max-width:1023px){
  :root{--section-y:64px;}
  .header-inner{flex-wrap:wrap;min-height:64px;padding:10px 0;row-gap:10px;}
  .nav-links{display:none;}
  .nav-toggle{display:flex;}
  .search-form{
    order:3;
    flex:1 1 100%;
    max-width:none;
    height:48px;
  }
  .search-form input{height:44px;}
  .toc-panel{position:static;margin-bottom:28px;}
  .flow{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .split{gap:32px;padding:36px 0;}
}

@media screen and (max-width:767px){
  body{font-size:16px;}
  .container{padding-left:18px;padding-right:18px;}
  .page-hero-inner{padding:26px 0 60px;}
  .breadcrumb{margin-bottom:24px;}
  .stat-band{
    grid-template-columns:1fr 1fr;
    gap:26px 0;
    padding:30px 22px;
  }
  .stat-item{padding:0 18px;}
  .stat-item:nth-child(odd){border-left:0;padding-left:0;}
  .stat-item:nth-child(3){border-left:0;padding-left:0;}
  .split{grid-template-columns:1fr;}
  .split.reverse .split-media{order:0;}
  .split-media{aspect-ratio:16/9;}
  .cta-band{padding:34px 24px;}
  .faq-a-inner{padding:0 20px 20px 20px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-col p{max-width:none;}
}

@media screen and (max-width:520px){
  .flow{grid-template-columns:1fr;}
  .stat-band{grid-template-columns:1fr;gap:22px;}
  .stat-item{border-left:0;padding-left:0;}
  .hero-actions .button{width:100%;}
  .faq-q{padding:16px 18px;gap:12px;}
  .faq-q .q-text{font-size:16px;}
  .func-card .body{padding:18px;}
  .to-top{right:16px;bottom:16px;}
}

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