/* roulang page: index */
:root{
  --ink:#141B18;
  --pine:#2E4A3E;
  --moss:#6E8A78;
  --base:#F6F3EE;
  --surface:#FFFFFF;
  --sand:#EAE4D9;
  --line:#D9D2C5;
  --signal:#C4441C;
  --signal-dark:#9E3413;
  --text:#1D2622;
  --text-2:#5A6660;
  --text-3:#8C968F;
  --ok:#2F7A52;
  --warn:#B8860B;
  --err:#B03A15;
  --r-card:14px;
  --r-img:10px;
  --r-btn:10px;
  --r-badge:999px;
  --r-big:18px;
  --sh-1:0 1px 2px rgba(20,27,24,.06);
  --sh-2:0 12px 28px rgba(20,27,24,.10);
  --sh-3:0 6px 18px rgba(20,27,24,.08);
  --sh-hard:0 3px 0 rgba(20,27,24,.85);
  --ease:cubic-bezier(.2,.7,.3,1);
  --fs-display:clamp(34px,5.2vw,64px);
  --fs-h1:clamp(30px,4vw,48px);
  --fs-h2:clamp(24px,3vw,36px);
  --fs-h3:clamp(18px,2vw,22px);
  --fs-body:16px;
  --fs-lead:18px;
  --fs-sm:14px;
  --fs-xs:12.5px;
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
  --sans:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --w:1180px;
  --pad-x:56px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--sans);
  font-size:var(--fs-body);
  line-height:1.8;
  color:var(--text);
  background:var(--base);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--pine);text-decoration:none;}
a:hover{color:var(--signal);}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:none;cursor:pointer;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:22px;}
input,textarea,select{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:4px;}
.container{width:100%;max-width:var(--w);margin:0 auto;padding:0 var(--pad-x);}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;}
.eyebrow{
  display:inline-block;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--pine);
}
.section{padding:96px 0;}
.section--tight{padding:64px 0;}
.section--sand{background:var(--sand);}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:32px;
  margin-bottom:32px;
  flex-wrap:wrap;
}
.section-head h2{
  font-size:var(--fs-h2);
  font-weight:700;
  line-height:1.25;
  letter-spacing:-.01em;
  margin-top:8px;
  position:relative;
  padding-left:16px;
}
.section-head h2::before{
  content:"";
  position:absolute;
  left:0;top:.22em;
  width:3px;height:.92em;
  background:var(--signal);
  border-radius:2px;
}
.section-head p{color:var(--text-2);font-size:var(--fs-sm);max-width:56ch;margin-top:8px;padding-left:16px;}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:var(--fs-sm);
  font-weight:600;
  color:var(--pine);
  padding-bottom:2px;
  border-bottom:1px solid transparent;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.link-arrow span{transition:transform .22s var(--ease);}
.link-arrow:hover,.link-arrow:focus-visible{color:var(--signal);border-bottom-color:var(--signal);}
.link-arrow:hover span,.link-arrow:focus-visible span{transform:translateX(4px);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:0 24px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  border:1px solid transparent;
  transition:transform .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{background:var(--signal);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--signal-dark);color:#fff;transform:translateY(-2px);box-shadow:0 8px 20px rgba(196,68,28,.26);}
.btn-primary:active{transform:translateY(0);background:var(--signal-dark);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-outline{background:var(--surface);color:var(--pine);border-color:var(--line);}
.btn-outline:hover{border-color:var(--pine);color:var(--pine);background:var(--surface);transform:translateY(-2px);box-shadow:var(--sh-1);}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- top bar ---------- */
.topbar{background:var(--ink);color:#E8E4DB;font-size:var(--fs-xs);}
.topbar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:38px;
}
.topbar-left{display:flex;align-items:center;gap:14px;letter-spacing:.02em;}
.topbar-left .dot{width:6px;height:6px;border-radius:50%;background:var(--signal);display:inline-block;}
.topbar-right{display:flex;align-items:center;gap:0;}
.topbar-right a{
  color:#E8E4DB;
  padding:0 14px;
  line-height:38px;
  border-left:1px solid rgba(255,255,255,.18);
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.topbar-right a:first-child{border-left:none;}
.topbar-right a:hover,.topbar-right a:focus-visible{color:#fff;background:rgba(255,255,255,.06);}

/* ---------- header ---------- */
.header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease);
}
.header.is-stuck{box-shadow:var(--sh-3);}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:72px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--ink);
  flex-shrink:0;
}
.logo:hover{color:var(--ink);}
.logo-mark{
  display:grid;
  grid-template-columns:repeat(3,6px);
  grid-template-rows:repeat(3,6px);
  gap:2px;
  padding:7px;
  border:1.5px solid var(--ink);
  border-radius:8px;
  background:var(--surface);
}
.logo-mark i{background:var(--ink);border-radius:1.5px;display:block;}
.logo-mark i:nth-child(5){background:var(--signal);}
.logo-text{
  font-size:17px;
  font-weight:800;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.nav{display:flex;align-items:center;gap:4px;}
.nav a{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:72px;
  padding:0 14px;
  font-size:14.5px;
  font-weight:500;
  color:var(--text-2);
  transition:color .2s var(--ease);
}
.nav a::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:18px;
  height:2px;
  background:var(--signal);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s var(--ease);
}
.nav a:hover,.nav a:focus-visible{color:var(--ink);}
.nav a:hover::after,.nav a:focus-visible::after{transform:scaleX(1);}
.nav a.is-active{color:var(--ink);font-weight:600;}
.nav a.is-active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  color:var(--text-2);
  background:var(--surface);
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease);
}
.icon-btn:hover{border-color:var(--ink);color:var(--ink);background:var(--base);}
.icon-btn svg{width:18px;height:18px;}
.header-actions .btn{min-height:44px;padding:0 20px;}
.burger{display:none;}

/* ---------- drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(20,27,24,.5);
  opacity:0;visibility:hidden;
  transition:opacity .25s var(--ease),visibility .25s var(--ease);
  z-index:90;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;
  top:0;right:0;
  width:min(84vw,340px);
  height:100%;
  background:var(--surface);
  z-index:100;
  transform:translateX(100%);
  transition:transform .32s var(--ease);
  display:flex;
  flex-direction:column;
  padding:20px;
  overflow-y:auto;
  border-left:1px solid var(--line);
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
.drawer-close{
  width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);
  display:flex;align-items:center;justify-content:center;color:var(--text-2);
}
.drawer-close:hover{color:var(--ink);border-color:var(--ink);}
.drawer nav{display:flex;flex-direction:column;}
.drawer nav a{
  display:flex;align-items:center;
  min-height:48px;
  padding:0 4px;
  font-size:15px;
  color:var(--text);
  border-bottom:1px solid var(--line);
}
.drawer nav a.is-active{color:var(--signal);font-weight:600;}
.drawer .btn{margin-top:20px;width:100%;}
.drawer-meta{margin-top:24px;font-size:var(--fs-xs);color:var(--text-3);line-height:2;}
.drawer-meta strong{display:block;color:var(--text-2);font-size:var(--fs-sm);font-weight:600;}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding:88px 0 72px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(20,27,24,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(20,27,24,.04) 1px,transparent 1px);
  background-size:64px 64px;
  pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:24px;
  align-items:center;
}
.hero-copy{grid-column:span 7;}
.hero h1{
  font-size:var(--fs-display);
  font-weight:800;
  line-height:1.06;
  letter-spacing:-.02em;
  margin:14px 0 18px;
  max-width:15em;
}
.hero-sub{
  font-size:var(--fs-lead);
  line-height:1.75;
  color:var(--text-2);
  max-width:34em;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:36px;}
.hero-stats{
  display:flex;
  align-items:stretch;
  gap:0;
  flex-wrap:wrap;
  border-top:1px solid var(--line);
  padding-top:20px;
}
.hero-stat{padding-right:28px;margin-right:28px;border-right:1px solid var(--line);}
.hero-stat:last-child{border-right:none;padding-right:0;margin-right:0;}
.hero-stat b{
  display:block;
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  font-size:24px;
  font-weight:700;
  line-height:1.2;
  color:var(--ink);
}
.hero-stat span{font-size:var(--fs-xs);color:var(--text-3);letter-spacing:.02em;}

.hero-media{grid-column:span 5;position:relative;}
.hero-photo{
  border-radius:var(--r-big);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--sand);
  box-shadow:var(--sh-1);
  aspect-ratio:16/11;
}
.hero-photo img{width:100%;height:100%;object-fit:cover;}
.hero-mini{
  position:absolute;
  right:-6px;
  bottom:-22px;
  width:42%;
  min-width:150px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-2);
  overflow:hidden;
}
.hero-mini img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.hero-mini-body{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;font-size:var(--fs-xs);color:var(--text-2);}
.hero-mini-body strong{font-family:var(--mono);font-size:15px;color:var(--pine);}
.hero-stamp{
  position:absolute;
  top:-22px;right:14px;
  width:88px;height:88px;
  border-radius:50%;
  border:1px solid var(--signal);
  background:rgba(246,243,238,.86);
  color:var(--signal);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);
  font-size:22px;font-weight:700;
  letter-spacing:.04em;
  transform:rotate(-8deg);
}

/* ---------- guarantee ---------- */
.guarantee{background:var(--sand);border-bottom:1px solid var(--line);}
.guarantee-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  padding:18px 0;
}
.guarantee-item{
  display:flex;
  gap:12px;
  padding:0 24px;
  border-right:1px solid var(--line);
}
.guarantee-item:first-child{padding-left:0;}
.guarantee-item:last-child{border-right:none;padding-right:0;}
.guarantee-item svg{width:18px;height:18px;color:var(--pine);flex-shrink:0;margin-top:4px;}
.guarantee-item b{display:block;font-size:13.5px;font-weight:600;color:var(--ink);}
.guarantee-item span{font-size:12px;color:var(--text-2);line-height:1.6;}

/* ---------- mixed grid ---------- */
.mix-grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:24px;
}
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  box-shadow:var(--sh-1);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.card:hover,.card:focus-within{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--moss);}
.card-media{overflow:hidden;background:var(--sand);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.card:hover .card-media img{transform:scale(1.04);}
.card-body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-title{
  font-size:17px;
  font-weight:600;
  line-height:1.45;
  color:var(--ink);
  transition:color .2s var(--ease);
}
.card:hover .card-title{color:var(--pine);}
.card-desc{font-size:var(--fs-sm);color:var(--text-2);line-height:1.7;}
.card-foot{
  margin-top:auto;
  padding-top:12px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  border-top:1px dashed var(--line);
  font-family:var(--mono);
  font-size:var(--fs-xs);
  color:var(--text-3);
}
.card-foot .go{color:var(--pine);transition:transform .24s var(--ease),color .2s var(--ease);}
.card:hover .card-foot .go{transform:translateX(4px);color:var(--signal);}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border-radius:var(--r-badge);
  background:rgba(46,74,62,.10);
  color:var(--pine);
  font-size:var(--fs-xs);
  font-weight:600;
  letter-spacing:.02em;
  align-self:flex-start;
}
.badge--signal{background:rgba(196,68,28,.10);color:var(--signal);}
.badge--line{background:transparent;border:1px dashed var(--line);color:var(--text-2);font-weight:500;}

.card-lg{grid-column:span 6;grid-row:span 2;}
.card-lg .card-media{aspect-ratio:16/10;}
.card-lg .card-body{padding:22px;gap:12px;}
.card-lg .card-title{font-size:22px;line-height:1.35;}
.card-lg .card-desc{-webkit-line-clamp:2;display:-webkit-box;-webkit-box-orient:vertical;overflow:hidden;}
.card-sm{grid-column:span 3;}
.card-sm .card-media{aspect-ratio:4/3;}
.card-sm .card-title{font-size:17px;-webkit-line-clamp:2;display:-webkit-box;-webkit-box-orient:vertical;overflow:hidden;}
.card-sm .card-desc{font-size:13px;-webkit-line-clamp:1;display:-webkit-box;-webkit-box-orient:vertical;overflow:hidden;}

/* ---------- reviews ---------- */
.reviews{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.review-track{
  display:flex;
  gap:20px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding:4px 4px 20px;
  scrollbar-width:none;
}
.review-track::-webkit-scrollbar{display:none;}
.review-card{
  flex:0 0 340px;
  scroll-snap-align:start;
  background:var(--base);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  display:flex;
  flex-direction:column;
  gap:14px;
  transition:border-color .24s var(--ease),transform .24s var(--ease);
}
.review-card:hover{border-color:var(--moss);transform:translateY(-2px);}
.quote{
  font-family:var(--mono);
  font-size:40px;
  line-height:1;
  color:var(--ink);
  opacity:.16;
  height:26px;
}
.review-text{font-size:15px;line-height:1.75;color:var(--text);}
.review-person{display:flex;align-items:center;gap:10px;margin-top:auto;padding-top:6px;}
.avatar{
  width:36px;height:36px;border-radius:50%;
  background:var(--sand);
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);
  font-size:13px;font-weight:700;color:var(--pine);
}
.review-person b{display:block;font-size:var(--fs-sm);font-weight:600;line-height:1.4;}
.review-person span{font-size:var(--fs-xs);color:var(--text-3);}
.review-controls{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-top:12px;}
.review-arrows{display:flex;gap:10px;}
.arrow-btn{
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--text-2);
  background:transparent;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.arrow-btn:hover,.arrow-btn:focus-visible{background:var(--ink);color:#fff;border-color:var(--ink);}
.arrow-btn svg{width:16px;height:16px;}
.progress{flex:1;height:2px;background:var(--line);border-radius:2px;overflow:hidden;}
.progress i{display:block;height:100%;width:20%;background:var(--signal);transition:width .3s var(--ease);}

/* ---------- news / cms ---------- */
.news-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.news-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px;
  display:flex;
  flex-direction:column;
  gap:10px;
  color:var(--text);
  transition:transform .26s var(--ease),box-shadow .26s var(--ease),border-color .26s var(--ease);
}
.news-card:hover,.news-card:focus-visible{
  transform:translateY(-4px);
  box-shadow:var(--sh-2);
  border-color:var(--moss);
  color:var(--text);
}
.news-top{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.news-date{font-family:var(--mono);font-size:var(--fs-xs);color:var(--text-3);font-variant-numeric:tabular-nums;}
.news-title{
  font-size:18px;
  font-weight:600;
  line-height:1.5;
  color:var(--ink);
  transition:color .2s var(--ease);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card:hover .news-title{color:var(--signal);}
.news-excerpt{
  font-size:var(--fs-sm);
  color:var(--text-2);
  line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-more{margin-top:auto;padding-top:12px;font-size:var(--fs-sm);font-weight:600;color:var(--pine);display:inline-flex;gap:6px;align-items:center;}
.news-card:hover .news-more{color:var(--signal);}
.empty-state{
  border:1px dashed var(--line);
  border-radius:var(--r-card);
  min-height:200px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:16px;
  color:var(--text-3);
  font-size:var(--fs-sm);
  background:var(--surface);
}

/* ---------- faq ---------- */
.faq-grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:24px;
  align-items:start;
}
.faq-aside{grid-column:span 4;position:sticky;top:96px;}
.faq-aside h2{
  font-size:var(--fs-h2);
  font-weight:700;
  line-height:1.25;
  letter-spacing:-.01em;
  margin:10px 0 14px;
}
.faq-aside p{font-size:var(--fs-sm);color:var(--text-2);line-height:1.8;max-width:30ch;}
.faq-aside .btn{margin-top:22px;}
.faq-list{grid-column:span 8;}
.faq-item{border-top:1px solid var(--line);}
.faq-item:last-child{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 4px;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--pine);}
.faq-icon{
  position:relative;
  width:20px;height:20px;flex-shrink:0;
  transition:transform .3s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--text-2);border-radius:1px;
}
.faq-icon::before{left:0;top:9px;width:20px;height:2px;}
.faq-icon::after{top:0;left:9px;width:2px;height:20px;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:var(--signal);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s var(--ease);
}
.faq-a-inner{
  padding:0 4px 20px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
  max-width:62ch;
}

/* ---------- cta ---------- */
.cta{
  position:relative;
  background:var(--ink);
  color:#EDE9E0;
  overflow:hidden;
}
.cta::after{
  content:"J9";
  position:absolute;
  right:-20px;bottom:-70px;
  font-family:var(--mono);
  font-size:clamp(180px,22vw,260px);
  font-weight:700;
  line-height:1;
  color:#fff;
  opacity:.06;
  pointer-events:none;
}
.cta-grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:24px;
  align-items:center;
  padding:80px 0;
}
.cta-copy{grid-column:span 7;}
.cta-copy h2{
  font-size:clamp(28px,3.4vw,44px);
  font-weight:800;
  line-height:1.18;
  letter-spacing:-.02em;
  color:#fff;
}
.cta-side{grid-column:span 5;}
.cta-side p{font-size:var(--fs-sm);color:#B9BDB5;line-height:1.9;margin-bottom:20px;}
.cta-form{display:flex;gap:10px;flex-wrap:wrap;}
.cta-form input{
  flex:1 1 200px;
  min-height:48px;
  padding:14px 16px;
  border-radius:var(--r-btn);
  border:1px solid rgba(255,255,255,.22);
  background:rgba(255,255,255,.06);
  color:#fff;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.cta-form input::placeholder{color:#8C968F;}
.cta-form input:focus{
  outline:none;
  border-color:#fff;
  box-shadow:0 0 0 3px rgba(255,255,255,.14);
}
.cta-note{margin-top:12px;font-size:var(--fs-xs);color:#8C968F;}

/* ---------- footer ---------- */
.footer{background:var(--ink);color:#B9BDB5;padding-top:72px;}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr 1.2fr;
  gap:32px;
  padding-bottom:48px;
}
.footer-brand .logo{color:#fff;}
.footer-brand .logo-mark{border-color:#fff;background:transparent;}
.footer-brand .logo-mark i{background:#fff;}
.footer-brand .logo-mark i:nth-child(5){background:var(--signal);}
.footer-brand p{font-size:var(--fs-sm);color:#9AA29B;line-height:1.85;margin-top:14px;max-width:30ch;}
.footer-social{display:flex;gap:10px;margin-top:18px;}
.footer-social a{
  width:36px;height:36px;
  border:1px solid rgba(255,255,255,.16);
  border-radius:8px;
  display:inline-flex;align-items:center;justify-content:center;
  color:#B9BDB5;
  transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.footer-social a:hover{color:#fff;border-color:#fff;transform:translateY(-2px);}
.footer-social svg{width:16px;height:16px;}
.footer-col h3{font-size:13px;font-weight:600;color:#fff;margin-bottom:14px;letter-spacing:.04em;}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col li{margin-bottom:2px;}
.footer-col a,.footer-col span{font-size:var(--fs-sm);color:var(--text-3);line-height:2.2;display:inline-block;transition:color .2s var(--ease),transform .2s var(--ease);}
.footer-col a:hover{color:#fff;transform:translateX(2px);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:var(--fs-xs);
  color:var(--text-3);
}
.footer-bottom .mono{letter-spacing:.04em;}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .48s var(--ease),transform .48s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  :root{--pad-x:40px;}
  .nav a{padding:0 10px;font-size:14px;}
  .nav a::after{left:10px;right:10px;}
}
@media (max-width:1023px){
  :root{--pad-x:32px;}
  .section{padding:72px 0;}
  .nav{display:none;}
  .burger{display:inline-flex;}
  .header-actions .btn{display:none;}
  .hero{padding:56px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-copy,.hero-media{grid-column:span 1;}
  .hero-media{max-width:560px;}
  .guarantee-grid{grid-template-columns:repeat(2,1fr);gap:16px 0;}
  .guarantee-item{padding:0 16px;}
  .guarantee-item:nth-child(2){border-right:none;}
  .guarantee-item:nth-child(1),.guarantee-item:nth-child(3){padding-left:0;}
  .guarantee-item:nth-child(3),.guarantee-item:nth-child(4){padding-top:14px;border-top:1px solid var(--line);}
  .mix-grid{grid-template-columns:repeat(6,1fr);}
  .card-lg{grid-column:span 6;grid-row:auto;}
  .card-sm{grid-column:span 3;}
  .faq-aside,.faq-list{grid-column:span 12;}
  .faq-aside{position:static;}
  .faq-aside p{max-width:52ch;}
  .cta-copy,.cta-side{grid-column:span 12;}
  .cta-grid{padding:64px 0;}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px;}
  .footer-brand{grid-column:span 2;}
}
@media (max-width:767px){
  :root{--pad-x:20px;}
  .section{padding:48px 0;}
  .section-head{gap:16px;margin-bottom:24px;}
  .topbar-left{display:none;}
  .topbar-right{width:100%;justify-content:flex-end;}
  .topbar-right a{padding:0 12px;}
  .hero h1{font-size:clamp(30px,8vw,40px);}
  .hero-stats{gap:0;}
  .hero-stat{padding-right:16px;margin-right:16px;margin-bottom:8px;}
  .hero-stat b{font-size:20px;}
  .hero-stamp{width:70px;height:70px;font-size:18px;top:-16px;right:6px;}
  .hero-mini{width:48%;right:0;bottom:-16px;}
  .mix-grid{grid-template-columns:1fr;gap:16px;}
  .card-lg,.card-sm{grid-column:span 1;}
  .card-lg .card-title{font-size:20px;}
  .news-grid{grid-template-columns:1fr;gap:16px;}
  .review-card{flex:0 0 78vw;padding:20px;}
  .review-controls{flex-direction:column;align-items:stretch;gap:16px;}
  .cta-form input{flex:1 1 100%;}
  .footer{padding-top:48px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-brand{grid-column:span 1;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .faq-q{font-size:15px;padding:18px 2px;}
}
@media (max-width:479px){
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .guarantee-grid{grid-template-columns:1fr;}
  .guarantee-item{border-right:none;padding-left:0;padding-right:0;}
  .guarantee-item:nth-child(3),.guarantee-item:nth-child(4){padding-top:12px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  .reveal{transform:none;}
}

/* roulang page: article */
:root{
  --ink:#141B18;
  --pine:#2E4A3E;
  --moss:#6E8A78;
  --base:#F6F3EE;
  --surface:#FFFFFF;
  --sand:#EAE4D9;
  --line:#D9D2C5;
  --signal:#C4441C;
  --signal-dark:#9E3413;
  --text:#1D2622;
  --text-2:#5A6660;
  --text-3:#8C968F;
  --ok:#2F7A52;
  --warn:#B8860B;
  --err:#B03A15;
  --fs-display:clamp(34px,5.2vw,64px);
  --fs-h1:clamp(30px,4vw,48px);
  --fs-h2:clamp(24px,3vw,36px);
  --fs-h3:clamp(18px,2vw,22px);
  --fs-body:16px;
  --fs-lead:18px;
  --fs-sm:14px;
  --fs-xs:12.5px;
  --r-card:14px;
  --r-img:10px;
  --r-btn:10px;
  --r-input:10px;
  --r-badge:999px;
  --r-big:18px;
  --sh-1:0 1px 2px rgba(20,27,24,.06);
  --sh-2:0 12px 28px rgba(20,27,24,.10);
  --sh-3:0 6px 18px rgba(20,27,24,.08);
  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:ui-monospace,SFMono-Regular,"JetBrains Mono",Menlo,Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--base);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:var(--fs-body);
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;border-radius:var(--r-img)}
a{color:var(--pine);text-decoration:none;transition:color .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease)}
a:hover{color:var(--signal)}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:4px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.01em}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 56px}

/* ---------- top bar ---------- */
.topbar{background:var(--ink);color:rgba(255,255,255,.72);font-size:var(--fs-xs)}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;height:38px}
.topbar-left{display:flex;align-items:center;gap:12px;letter-spacing:.02em;white-space:nowrap}
.topbar-sep{width:1px;height:12px;background:rgba(255,255,255,.18);display:inline-block}
.topbar-right{display:flex;align-items:center;gap:16px;white-space:nowrap}
.topbar a{color:rgba(255,255,255,.82);font-size:var(--fs-xs)}
.topbar a:hover{color:#fff}

/* ---------- header / nav ---------- */
.site-head{position:sticky;top:0;z-index:60;background:var(--surface);border-bottom:1px solid var(--line);transition:box-shadow .28s var(--ease)}
.site-head.is-scrolled{box-shadow:var(--sh-3)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink)}
.logo:hover{color:var(--ink)}
.logo-mark{display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);gap:2px;width:26px;height:26px;flex:none}
.logo-mark i{background:var(--ink);border-radius:2px;display:block}
.logo-mark i:nth-child(5){background:var(--signal)}
.logo-text{font-weight:800;font-size:19px;letter-spacing:-.01em;line-height:1}
.nav{display:flex;align-items:center;gap:28px}
.nav a{position:relative;display:inline-block;padding:6px 0;font-size:14.5px;font-weight:500;color:var(--text-2);line-height:1.4}
.nav a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--signal);transition:width .22s var(--ease);border-radius:2px}
.nav a:hover{color:var(--ink)}
.nav a:hover::after{width:100%}
.nav a.is-active{color:var(--ink);font-weight:600}
.nav a.is-active::after{width:100%}
.nav-tools{display:flex;align-items:center;gap:12px;flex:none}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--line);border-radius:9px;color:var(--text-2);background:var(--surface);transition:all .22s var(--ease)}
.icon-btn:hover{color:var(--ink);border-color:var(--ink)}
.icon-btn:active{background:var(--sand)}
.icon-btn svg{width:17px;height:17px}
.burger{display:none;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;border:1px solid var(--line);border-radius:9px;padding:0 11px}
.burger span{display:block;height:2px;background:var(--ink);border-radius:2px;transition:transform .22s var(--ease),opacity .22s var(--ease)}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;white-space:nowrap;transition:all .22s var(--ease);line-height:1}
.btn svg{width:16px;height:16px;transition:transform .22s var(--ease)}
.btn-primary{background:var(--signal);color:#fff}
.btn-primary:hover{background:var(--signal-dark);color:#fff;box-shadow:0 8px 20px rgba(196,68,28,.26);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);box-shadow:none;background:var(--signal-dark)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink);background:var(--surface);color:var(--ink)}
.btn-ghost:active{background:var(--sand)}
.btn-sm{height:38px;padding:0 18px;font-size:13.5px;border-radius:9px}
.btn-block{width:100%}
.btn[disabled]{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none}

/* ---------- drawer ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(20,27,24,.5);z-index:80;opacity:0;transition:opacity .3s var(--ease)}
.drawer-mask.is-show{opacity:1}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(340px,86vw);background:var(--surface);z-index:90;transform:translateX(104%);transition:transform .34s var(--ease);display:flex;flex-direction:column;box-shadow:-8px 0 32px rgba(20,27,24,.16)}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line)}
.drawer-close{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:9px;color:var(--text-2)}
.drawer-close:hover{color:var(--ink);border-color:var(--ink)}
.drawer-nav{padding:8px 12px;display:flex;flex-direction:column}
.drawer-nav a{display:flex;align-items:center;height:48px;padding:0 12px;border-radius:9px;font-size:15px;font-weight:500;color:var(--text-2)}
.drawer-nav a:hover,.drawer-nav a.is-active{background:var(--sand);color:var(--ink)}
.drawer-foot{margin-top:auto;padding:20px;border-top:1px solid var(--line);display:grid;gap:12px}
.drawer-foot p{font-size:12.5px;color:var(--text-3);line-height:1.7}

/* ---------- breadcrumb ---------- */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:24px 0 0;font-size:var(--fs-xs);color:var(--text-3)}
.crumb a{color:var(--text-3)}
.crumb a:hover{color:var(--signal)}
.crumb .sep{opacity:.55}
.crumb [aria-current="page"]{color:var(--text-2);max-width:46ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- article head ---------- */
.post-head{max-width:840px;padding:20px 0 0}
.tag{display:inline-block;padding:4px 12px;border-radius:var(--r-badge);background:rgba(46,74,62,.10);color:var(--pine);font-size:12px;font-weight:600;letter-spacing:.02em}
.post-title{font-size:clamp(28px,3.6vw,42px);font-weight:700;line-height:1.22;letter-spacing:-.01em;color:var(--ink);margin:18px 0 0}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:20px;padding-bottom:24px;border-bottom:1px solid var(--line);font-size:13px;color:var(--text-3)}
.post-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--text-3);opacity:.6}
.post-share{margin-left:auto;display:flex;gap:8px}
.share-btn{display:inline-flex;align-items:center;gap:6px;height:34px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-badge);font-size:var(--fs-xs);color:var(--text-2);background:var(--surface);transition:all .22s var(--ease)}
.share-btn:hover{border-color:var(--ink);color:var(--ink);transform:translateY(-1px);box-shadow:var(--sh-1)}
.share-btn:active{transform:translateY(0);background:var(--sand)}

/* ---------- article layout ---------- */
.post-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:56px;align-items:start;padding:44px 0 0}
.post-body{min-width:0}

.post-body p{font-size:17px;line-height:1.9;color:var(--text);margin-bottom:20px}
.post-body > p:first-of-type{font-size:18px;color:var(--ink)}
.post-body h2{position:relative;font-size:24px;font-weight:700;line-height:1.35;color:var(--ink);margin:48px 0 16px;padding-left:14px}
.post-body h2::before{content:"";position:absolute;left:0;top:.34em;width:3px;height:18px;border-radius:2px;background:var(--signal)}
.post-body h3{font-size:19px;font-weight:600;line-height:1.5;color:var(--ink);margin:32px 0 12px}
.post-body h4{font-size:17px;font-weight:600;color:var(--ink);margin:24px 0 10px}
.post-body ul,.post-body ol{margin:0 0 20px;padding-left:22px}
.post-body ul{list-style:disc}
.post-body ol{list-style:decimal}
.post-body li{font-size:16.5px;line-height:1.85;margin-bottom:8px}
.post-body li::marker{color:var(--moss)}
.post-body blockquote{margin:24px 0;padding:20px 22px;border-left:3px solid var(--pine);background:var(--sand);border-radius:0 var(--r-btn) var(--r-btn) 0;color:var(--text-2);font-size:16px;line-height:1.85}
.post-body blockquote p{font-size:16px;color:var(--text-2);margin-bottom:12px}
.post-body blockquote p:last-child{margin-bottom:0}
.post-body img{width:100%;margin:24px 0 8px;border-radius:12px}
.post-body figure{margin:24px 0}
.post-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:8px}
.post-body a{color:var(--pine);border-bottom:1px dashed var(--moss)}
.post-body a:hover{color:var(--signal);border-bottom-color:var(--signal)}
.post-body strong{font-weight:700;color:var(--ink)}
.post-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14.5px;line-height:1.7}
.post-body th,.post-body td{border:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top}
.post-body th{background:var(--sand);font-weight:600;color:var(--ink)}
.post-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}

/* ---------- empty ---------- */
.empty-state{border:1px dashed var(--line);border-radius:var(--r-card);background:var(--surface);padding:56px 24px;text-align:center}
.empty-state h2{font-size:20px;font-weight:700;color:var(--ink);margin-bottom:10px}
.empty-state p{font-size:14.5px;color:var(--text-2);margin-bottom:22px}

/* ---------- tags / post foot ---------- */
.post-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:40px;padding-top:24px;border-top:1px solid var(--line)}
.post-tags a{display:inline-block;padding:6px 14px;border:1px solid var(--line);border-radius:var(--r-badge);font-size:var(--fs-xs);color:var(--text-2);background:var(--surface);transition:all .22s var(--ease)}
.post-tags a:hover{border-color:var(--pine);color:var(--pine);background:rgba(46,74,62,.06);transform:translateY(-1px)}
.post-foot{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:26px}

/* ---------- sidebar ---------- */
.post-side{position:sticky;top:96px;display:grid;gap:20px}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--sh-1)}
.side-card h2{font-size:14px;font-weight:700;color:var(--ink);letter-spacing:.02em;padding-bottom:12px;margin-bottom:14px;border-bottom:1px solid var(--line)}
.side-list li+li{margin-top:12px;padding-top:12px;border-top:1px dashed var(--line)}
.side-list a{display:block;font-size:14px;font-weight:600;line-height:1.6;color:var(--ink)}
.side-list a:hover{color:var(--signal)}
.side-list span{display:block;font-size:var(--fs-xs);color:var(--text-3);margin-top:4px;line-height:1.6}
.side-cta{background:var(--sand);border:1px solid var(--line);border-radius:var(--r-card);padding:22px}
.side-cta h2{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:8px}
.side-cta p{font-size:13.5px;line-height:1.75;color:var(--text-2);margin-bottom:16px}

/* ---------- related ---------- */
.related{padding:72px 0 96px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section-head h2{position:relative;padding-left:16px;font-size:var(--fs-h2);font-weight:700;line-height:1.25;color:var(--ink)}
.section-head h2::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:26px;border-radius:2px;background:var(--signal)}
.section-head p{font-size:14px;color:var(--text-3);max-width:36ch}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease)}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#CFC7B8}
.card:active{transform:translateY(-1px)}
.card-media{aspect-ratio:4/3;overflow:hidden;background:var(--sand)}
.card-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .45s var(--ease)}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{display:flex;flex-direction:column;gap:8px;padding:18px;flex:1}
.card-kicker{font-size:12px;font-weight:600;color:var(--pine)}
.card-title{font-size:17px;font-weight:600;line-height:1.5;color:var(--ink);transition:color .22s var(--ease)}
.card:hover .card-title{color:var(--pine)}
.card-text{font-size:13.5px;line-height:1.7;color:var(--text-2)}
.card-link{display:inline-flex;align-items:center;gap:6px;margin-top:auto;padding-top:6px;font-size:13.5px;font-weight:600;color:var(--pine)}
.card:hover .card-link{color:var(--signal)}
.card-link svg{width:15px;height:15px;transition:transform .22s var(--ease)}
.card:hover .card-link svg{transform:translateX(4px)}

/* ---------- footer ---------- */
.footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1.15fr;gap:40px;padding-bottom:48px}
.footer .logo-text{color:#fff}
.footer .logo-mark i{background:rgba(255,255,255,.85)}
.footer .logo-mark i:nth-child(5){background:var(--signal)}
.footer-brand p{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.6);margin:14px 0 18px;max-width:34ch}
.footer-social{display:flex;gap:10px}
.footer-social a{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid rgba(255,255,255,.18);border-radius:9px;color:rgba(255,255,255,.7);transition:all .22s var(--ease)}
.footer-social a:hover{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.42);transform:translateY(-2px)}
.footer-social svg{width:17px;height:17px}
.footer-col h3{font-size:13px;font-weight:600;color:#fff;letter-spacing:.02em;margin-bottom:16px}
.footer-col li{margin-bottom:2px}
.footer-col a{display:inline-block;font-size:13.5px;line-height:2.2;color:rgba(255,255,255,.6);transition:transform .2s var(--ease),color .2s var(--ease)}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-col p{font-size:13.5px;line-height:1.95;color:rgba(255,255,255,.6)}
.footer-col p strong{display:block;color:rgba(255,255,255,.86);font-weight:600;margin-bottom:2px}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding:20px 0 28px;border-top:1px solid rgba(255,255,255,.12);font-size:var(--fs-xs);color:rgba(255,255,255,.45)}
.footer-bottom a{color:rgba(255,255,255,.55)}
.footer-bottom a:hover{color:#fff}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container{padding:0 48px}
  .post-layout{grid-template-columns:minmax(0,1fr) 264px;gap:44px}
}
@media (max-width:1023px){
  .container{padding:0 40px}
  .topbar-left span:not(.topbar-sep){display:none}
  .nav{display:none}
  .burger{display:flex}
  .nav-tools .btn-sm{display:none}
  .post-layout{grid-template-columns:minmax(0,1fr);gap:40px}
  .post-side{position:static;grid-template-columns:1fr 1fr;gap:20px}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
  .related{padding:56px 0 72px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .nav-wrap{height:64px;gap:12px}
  .logo-text{font-size:17px}
  .topbar .container{height:34px}
  .topbar-right{gap:12px}
  .crumb{padding-top:16px}
  .crumb [aria-current="page"]{white-space:normal;max-width:none}
  .post-head{padding-top:14px}
  .post-title{font-size:clamp(24px,6.4vw,30px)}
  .post-share{margin-left:0;width:100%}
  .post-layout{padding-top:32px}
  .post-body p{font-size:16px}
  .post-body > p:first-of-type{font-size:17px}
  .post-body h2{font-size:21px;margin-top:36px}
  .post-body h3{font-size:17.5px}
  .post-body li{font-size:15.5px}
  .post-body table{font-size:13.5px}
  .post-body th,.post-body td{padding:10px 10px}
  .post-side{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start;gap:8px}
  .footer{padding-top:48px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;gap:6px}
}
@media (max-width:479px){
  .container{padding:0 16px}
  .btn{height:44px;font-size:14px;padding:0 18px}
  .icon-btn{width:38px;height:38px}
  .related{padding:48px 0 60px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}

/* roulang page: category1 */
:root{
  --ink:#141B18;
  --pine:#2E4A3E;
  --moss:#6E8A78;
  --base:#F6F3EE;
  --surface:#FFFFFF;
  --sand:#EAE4D9;
  --line:#D9D2C5;
  --signal:#C4441C;
  --signal-dark:#9E3413;
  --text:#1D2622;
  --text-2:#5A6660;
  --text-3:#8C968F;
  --ok:#2F7A52;
  --warn:#B8860B;
  --err:#B03A15;

  --fs-display:clamp(34px,5.2vw,64px);
  --fs-h1:clamp(30px,4vw,48px);
  --fs-h2:clamp(24px,3vw,36px);
  --fs-h3:clamp(18px,2vw,22px);
  --fs-body:16px;
  --fs-lead:18px;
  --fs-sm:14px;
  --fs-xs:12.5px;

  --r-card:14px;
  --r-img:10px;
  --r-btn:10px;
  --r-lg:18px;

  --sh-1:0 1px 2px rgba(20,27,24,.06);
  --sh-2:0 12px 28px rgba(20,27,24,.10);
  --sh-3:0 6px 18px rgba(20,27,24,.08);

  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--base);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-size:var(--fs-body);
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--pine);text-decoration:none}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:4px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

.container{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 56px;
}

/* ---------- 顶部信息条 ---------- */
.topbar{
  background:var(--ink);
  color:rgba(255,255,255,.72);
  font-size:var(--fs-xs);
  height:38px;
  display:flex;
  align-items:center;
}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar-note{margin:0;letter-spacing:.01em}
.topbar-links{display:flex;align-items:center;gap:12px}
.topbar-links a{color:rgba(255,255,255,.86);transition:color .22s var(--ease)}
.topbar-links a:hover{color:#fff}
.topbar .divider{width:1px;height:12px;background:rgba(255,255,255,.18);display:inline-block}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .28s var(--ease);
}
.site-header.is-stuck{box-shadow:var(--sh-3)}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:72px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--ink);
  flex-shrink:0;
}
.logo-mark{
  display:grid;
  grid-template-columns:repeat(3,6px);
  grid-template-rows:repeat(3,6px);
  gap:3px;
}
.logo-mark i{
  display:block;
  width:6px;
  height:6px;
  background:var(--ink);
  border-radius:2px;
}
.logo-mark i:nth-child(5),
.logo-mark i:nth-child(9){background:var(--signal)}
.logo-text{
  font-size:19px;
  font-weight:800;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.nav{display:flex;align-items:center;gap:28px}
.nav a{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:14.5px;
  font-weight:500;
  color:var(--text-2);
  transition:color .22s var(--ease);
}
.nav a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:0;
  height:2px;
  background:var(--signal);
  transition:width .22s var(--ease);
}
.nav a:hover{color:var(--ink)}
.nav a:hover::after{width:100%}
.nav a.is-active{color:var(--ink);font-weight:600}
.nav a.is-active::after{width:100%}

.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.icon-btn{
  width:40px;
  height:40px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--line);
  background:var(--surface);
  border-radius:var(--r-btn);
  color:var(--ink);
  cursor:pointer;
  transition:background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
}
.icon-btn:hover{background:var(--sand);border-color:var(--moss)}
.icon-btn:active{background:var(--line)}
.icon-btn svg{width:18px;height:18px}
.menu-btn{display:none}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.btn-primary{background:var(--signal);color:#fff}
.btn-primary:hover{background:var(--signal-dark);box-shadow:0 8px 20px rgba(196,68,28,.26);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink);background:var(--surface)}
.btn-ghost:active{background:var(--sand)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-arrow{transition:transform .24s var(--ease)}
.btn:hover .btn-arrow{transform:translateX(4px)}

/* ---------- 通用文本组件 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  font-size:12px;
  letter-spacing:.12em;
  color:var(--pine);
}
.eyebrow::before{
  content:"";
  width:18px;
  height:1px;
  background:var(--moss);
  display:inline-block;
}
.lead{
  font-size:var(--fs-lead);
  line-height:1.75;
  color:var(--text-2);
}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  position:relative;
  padding-bottom:2px;
  font-size:14px;
  font-weight:600;
  color:var(--pine);
  transition:color .22s var(--ease);
}
.text-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:100%;
  height:1px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s var(--ease);
}
.text-link:hover{color:var(--signal)}
.text-link:hover::after{transform:scaleX(1)}
.text-link .arrow{transition:transform .22s var(--ease)}
.text-link:hover .arrow{transform:translateX(4px)}

/* ---------- 分类首屏 ---------- */
.cat-hero{
  padding:72px 0 64px;
  background:var(--base);
  position:relative;
  overflow:hidden;
}
.cat-hero-grid{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:56px;
  align-items:center;
}
.cat-hero h1{
  font-size:var(--fs-h1);
  font-weight:800;
  line-height:1.15;
  letter-spacing:-.02em;
  margin-top:18px;
  max-width:14em;
}
.cat-hero .lead{margin-top:18px;max-width:34em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-stats{display:flex;flex-wrap:wrap;margin-top:36px}
.hero-stats > div{padding:0 24px;border-left:1px solid var(--line)}
.hero-stats > div:first-child{padding-left:0;border-left:0}
.hero-stats strong{
  display:block;
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  font-size:24px;
  font-weight:700;
  line-height:1.2;
  color:var(--ink);
}
.hero-stats span{font-size:var(--fs-xs);color:var(--text-3)}

.cat-hero-art{position:relative}
.cat-hero-art img{
  width:100%;
  height:auto;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.stamp{
  position:absolute;
  top:-20px;
  right:-16px;
  width:88px;
  height:88px;
  border-radius:50%;
  border:1px solid var(--signal);
  background:var(--base);
  display:grid;
  place-items:center;
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  font-size:22px;
  font-weight:700;
  color:var(--signal);
  letter-spacing:.04em;
}

/* ---------- 保障条 ---------- */
.assure{
  background:var(--sand);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.assure-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  padding:18px 0;
}
.assure-item{
  display:flex;
  gap:12px;
  align-items:flex-start;
  padding:0 24px;
  border-left:1px solid var(--line);
}
.assure-item:first-child{border-left:0;padding-left:0}
.assure-item svg{
  width:18px;
  height:18px;
  flex-shrink:0;
  margin-top:5px;
  color:var(--pine);
}
.assure-item strong{
  display:block;
  font-size:13.5px;
  font-weight:600;
  color:var(--ink);
  line-height:1.6;
}
.assure-item span{font-size:12px;color:var(--text-3);line-height:1.6}

/* ---------- 板块通用 ---------- */
.section{padding:96px 0}
.section-head{max-width:660px;margin-bottom:40px}
.section-head h2{
  font-size:var(--fs-h2);
  font-weight:700;
  line-height:1.25;
  letter-spacing:-.01em;
}
.section-head h2::before{
  content:"";
  display:inline-block;
  width:3px;
  height:22px;
  border-radius:2px;
  background:var(--signal);
  vertical-align:-3px;
  margin-right:12px;
}
.section-head p{margin-top:16px;color:var(--text-2)}

/* ---------- 图文交替 ---------- */
.zig-list{display:flex;flex-direction:column}
.zig-row{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:56px;
  align-items:center;
  padding:48px 0;
  border-top:1px solid var(--line);
}
.zig-row:first-child{border-top:0;padding-top:0}
.zig-row:last-child{padding-bottom:0}
.zig-row.reverse .zig-media{order:2}
.zig-row.reverse .zig-body{order:1}
.zig-media{
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--sand);
}
.zig-media img{
  width:100%;
  height:auto;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform .48s var(--ease);
}
.zig-row:hover .zig-media img{transform:scale(1.04)}
.zig-body h3{
  font-size:var(--fs-h3);
  font-weight:600;
  line-height:1.4;
  margin-bottom:14px;
  transition:color .24s var(--ease);
}
.zig-row:hover .zig-body h3{color:var(--pine)}
.zig-body p{color:var(--text-2);margin-bottom:14px}
.zig-body p:last-of-type{margin-bottom:20px}
.zig-index{
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--text-3);
  display:block;
  margin-bottom:10px;
}

/* ---------- 适用场景 ---------- */
.scene{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.scene-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.scene-card{
  background:var(--base);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px 24px;
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--moss)}
.scene-card .tag{
  display:inline-block;
  font-size:12px;
  font-weight:600;
  color:var(--pine);
  background:rgba(46,74,62,.08);
  border-radius:999px;
  padding:3px 10px;
  margin-bottom:16px;
}
.scene-card h3{font-size:17px;font-weight:600;margin-bottom:10px;line-height:1.5}
.scene-card p{font-size:14px;color:var(--text-2);line-height:1.75}

/* ---------- FAQ ---------- */
.faq-grid{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,8fr);
  gap:56px;
  align-items:start;
}
.faq-aside{position:sticky;top:96px}
.faq-aside h2{
  font-size:var(--fs-h2);
  font-weight:700;
  line-height:1.25;
  margin-bottom:16px;
}
.faq-aside p{color:var(--text-2);font-size:15px;max-width:28ch}
.faq-list{border-bottom:1px solid var(--line)}
.faq-item{border-top:1px solid var(--line)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 0;
  background:none;
  border:0;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  text-align:left;
  cursor:pointer;
  transition:color .22s var(--ease);
}
.faq-q:hover{color:var(--pine)}
.faq-icon{
  flex-shrink:0;
  width:20px;
  height:20px;
  position:relative;
  color:var(--moss);
  transition:transform .3s var(--ease),color .3s var(--ease);
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  background:currentColor;
  border-radius:1px;
}
.faq-icon::before{left:0;top:9px;width:20px;height:1.6px}
.faq-icon::after{top:0;left:9px;width:1.6px;height:20px}
.faq-item.is-open .faq-icon{transform:rotate(45deg);color:var(--signal)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s var(--ease);
}
.faq-a p{
  padding-bottom:20px;
  max-width:62ch;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
}

/* ---------- 转化条 ---------- */
.cta{
  background:var(--ink);
  color:#fff;
  position:relative;
  overflow:hidden;
}
.cta-inner{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:48px;
  align-items:center;
  padding:80px 0;
}
.cta h2{
  font-size:clamp(28px,4vw,44px);
  font-weight:800;
  line-height:1.15;
  letter-spacing:-.02em;
  color:#fff;
}
.cta-right p{
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.7);
  margin-bottom:18px;
}
.cta-watermark{
  position:absolute;
  right:-40px;
  bottom:-70px;
  font-family:var(--mono);
  font-size:260px;
  font-weight:800;
  line-height:1;
  color:rgba(255,255,255,.06);
  pointer-events:none;
  user-select:none;
}

/* ---------- 页脚 ---------- */
.footer{
  background:var(--ink);
  color:rgba(255,255,255,.7);
  padding:72px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:56px;
}
.footer-brand .logo-text{color:#fff}
.footer-brand .logo-mark i{background:rgba(255,255,255,.8)}
.footer-brand .logo-mark i:nth-child(5),
.footer-brand .logo-mark i:nth-child(9){background:var(--signal)}
.footer-brand p{
  margin-top:16px;
  font-size:14px;
  line-height:1.8;
  color:var(--text-3);
  max-width:30ch;
}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social a{
  width:36px;
  height:36px;
  border:1px solid rgba(255,255,255,.18);
  border-radius:10px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:rgba(255,255,255,.75);
  transition:border-color .22s var(--ease),color .22s var(--ease),background .22s var(--ease);
}
.footer-social a:hover{border-color:rgba(255,255,255,.5);color:#fff;background:rgba(255,255,255,.06)}
.footer-social svg{width:16px;height:16px}
.footer-col h3{
  font-size:13px;
  font-weight:600;
  color:#fff;
  letter-spacing:.04em;
  margin-bottom:16px;
}
.footer-col li{font-size:14px;line-height:2.2;color:var(--text-3)}
.footer-col a{
  color:var(--text-3);
  display:inline-block;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 28px;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  font-size:var(--fs-xs);
  color:var(--text-3);
}

/* ---------- 移动抽屉 ---------- */
.drawer-overlay{
  position:fixed;
  inset:0;
  background:rgba(20,27,24,.5);
  opacity:0;
  visibility:hidden;
  transition:opacity .3s var(--ease),visibility .3s var(--ease);
  z-index:80;
}
.drawer-overlay.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;
  top:0;
  right:0;
  bottom:0;
  width:min(84vw,340px);
  background:var(--surface);
  z-index:90;
  transform:translateX(100%);
  transition:transform .34s var(--ease);
  padding:20px;
  overflow-y:auto;
  display:flex;
  flex-direction:column;
  gap:6px;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer a{
  display:flex;
  align-items:center;
  min-height:48px;
  padding:0 12px;
  border-radius:10px;
  color:var(--text);
  font-size:15px;
  font-weight:500;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.drawer a:hover,
.drawer a.is-active{background:var(--sand);color:var(--ink)}
.drawer .drawer-cta{
  margin-top:16px;
  background:var(--signal);
  color:#fff;
  justify-content:center;
  font-weight:600;
}
.drawer .drawer-cta:hover{background:var(--signal-dark);color:#fff}
.drawer-note{
  margin-top:16px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  color:var(--text-3);
  line-height:1.8;
}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .48s var(--ease),transform .48s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

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

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 40px}
}
@media (max-width:1023px){
  .nav{display:none}
  .menu-btn{display:inline-flex}
  .container{padding:0 40px}
  .cat-hero{padding:52px 0 48px}
  .cat-hero-grid{grid-template-columns:minmax(0,1fr);gap:40px}
  .cat-hero h1{max-width:none}
  .section{padding:72px 0}
  .zig-row{grid-template-columns:minmax(0,1fr);gap:24px;padding:40px 0}
  .zig-row.reverse .zig-media{order:0}
  .zig-row.reverse .zig-body{order:0}
  .zig-row:first-child{padding-top:0}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .faq-grid{grid-template-columns:minmax(0,1fr);gap:32px}
  .faq-aside{position:static}
  .assure-grid{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:18px}
  .assure-item{border-left:0;padding:0}
  .assure-item:nth-child(2n){padding-left:20px;border-left:1px solid var(--line)}
  .cta-inner{grid-template-columns:minmax(0,1fr);gap:28px;padding:64px 0}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .topbar-note{display:none}
  .topbar .container{justify-content:flex-end}
  .header-inner{height:64px}
  .logo-text{font-size:17px}
  .header-actions .btn-sm{display:none}
  .cat-hero{padding:40px 0}
  .cat-hero h1{font-size:clamp(26px,7.4vw,34px)}
  .hero-stats > div{padding:0 16px}
  .hero-stats > div:nth-child(3){padding-left:0;border-left:0;margin-top:14px}
  .stamp{width:64px;height:64px;font-size:16px;top:-14px;right:-6px}
  .section{padding:48px 0}
  .scene-grid{grid-template-columns:minmax(0,1fr)}
  .assure-grid{grid-template-columns:minmax(0,1fr);row-gap:14px}
  .assure-item:nth-child(2n){padding-left:0;border-left:0}
  .cta-inner{padding:48px 0}
  .cta-watermark{font-size:150px;right:-24px;bottom:-40px}
  .footer{padding-top:56px}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{flex-direction:column;gap:8px}
  .btn{height:46px}
}
@media (max-width:479px){
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .logo-text{font-size:16px}
}

/* roulang page: category3 */
:root{
  --ink:#141B18;
  --pine:#2E4A3E;
  --moss:#6E8A78;
  --base:#F6F3EE;
  --surface:#FFFFFF;
  --sand:#EAE4D9;
  --line:#D9D2C5;
  --signal:#C4441C;
  --signal-dark:#9E3413;
  --text:#1D2622;
  --text-2:#5A6660;
  --text-3:#8C968F;
  --ok:#2F7A52;
  --warn:#B8860B;
  --err:#B03A15;

  --fs-display:clamp(34px,5.2vw,64px);
  --fs-h1:clamp(30px,4vw,48px);
  --fs-h2:clamp(24px,3vw,36px);
  --fs-h3:clamp(18px,2vw,22px);
  --fs-body:16px;
  --fs-lead:18px;
  --fs-sm:14px;
  --fs-xs:12.5px;

  --r-card:14px;
  --r-img:10px;
  --r-btn:10px;
  --r-big:18px;

  --sh-1:0 1px 2px rgba(20,27,24,.06);
  --sh-2:0 12px 28px rgba(20,27,24,.10);
  --sh-nav:0 6px 18px rgba(20,27,24,.08);

  --ease:cubic-bezier(.2,.7,.3,1);
  --mono:ui-monospace,SFMono-Regular,"JetBrains Mono","Courier New",monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--base);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:var(--fs-body);
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--pine);text-decoration:none;}
a:hover{color:var(--signal);}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:4px;}

.container{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 56px;
}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--ink);color:#DCD8CF;font-size:var(--fs-xs);}
.topbar-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:38px;gap:16px;
}
.topbar-note{opacity:.82;letter-spacing:.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.topbar-links{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.topbar-links a{color:#EDE9E1;opacity:.9;transition:opacity .22s var(--ease),color .22s var(--ease);}
.topbar-links a:hover{color:#fff;opacity:1;}
.topbar-links .sep{width:1px;height:12px;background:rgba(255,255,255,.18);}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .28s var(--ease);
}
.site-header.is-stuck{box-shadow:var(--sh-nav);}
.header-inner{
  display:flex;align-items:center;gap:28px;
  height:72px;
}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);flex-shrink:0;}
.logo-mark{
  width:30px;height:30px;display:grid;
  grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);
  gap:2px;
}
.logo-mark i{background:var(--ink);border-radius:1px;}
.logo-mark i:nth-child(3),
.logo-mark i:nth-child(7){background:var(--signal);}
.logo-text{font-weight:800;font-size:18px;letter-spacing:-.01em;white-space:nowrap;}
.logo:hover .logo-text{color:var(--signal);}

.nav{
  display:flex;align-items:center;gap:26px;
  margin-left:8px;flex:1;
}
.nav a{
  position:relative;
  font-size:14.5px;font-weight:500;color:var(--text-2);
  padding:6px 0;white-space:nowrap;
  transition:color .22s var(--ease);
}
.nav a::after{
  content:"";position:absolute;left:0;bottom:0;
  width:100%;height:2px;background:var(--signal);
  transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav a:hover{color:var(--ink);}
.nav a:hover::after{transform:scaleX(1);}
.nav a.is-active{color:var(--ink);font-weight:600;}
.nav a.is-active::after{transform:scaleX(1);}

.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.icon-btn{
  width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-btn);
  background:var(--surface);color:var(--text-2);cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.icon-btn svg{width:18px;height:18px;}
.icon-btn:hover{background:var(--sand);color:var(--ink);border-color:var(--moss);}
.icon-btn:active{background:var(--line);}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),
             transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn svg{width:16px;height:16px;transition:transform .22s var(--ease);}
.btn:hover svg{transform:translateX(4px);}
.btn-primary{background:var(--signal);color:#fff;}
.btn-primary:hover{background:var(--signal-dark);color:#fff;box-shadow:0 8px 20px rgba(196,68,28,.26);}
.btn-primary:active{background:var(--signal-dark);transform:translateY(1px);box-shadow:none;}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:#fff;}
.btn-ghost:active{background:var(--pine);border-color:var(--pine);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none;}

.burger{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-btn);background:var(--surface);
  color:var(--ink);cursor:pointer;
}
.burger svg{width:20px;height:20px;}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,27,24,.5);
  opacity:0;visibility:hidden;transition:opacity .28s var(--ease),visibility .28s var(--ease);
  z-index:90;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);
  background:var(--surface);z-index:95;
  transform:translateX(102%);
  transition:transform .34s var(--ease);
  display:flex;flex-direction:column;
  padding:20px 20px 28px;overflow-y:auto;
  border-left:1px solid var(--line);
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-close{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-btn);background:var(--surface);
  color:var(--ink);cursor:pointer;
}
.drawer-close svg{width:18px;height:18px;}
.drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--line);}
.drawer-nav a{
  min-height:48px;display:flex;align-items:center;
  border-bottom:1px solid var(--line);
  font-size:15px;font-weight:500;color:var(--text);
}
.drawer-nav a.is-active{color:var(--signal);font-weight:600;}
.drawer-foot{margin-top:auto;padding-top:24px;display:flex;flex-direction:column;gap:12px;}
.drawer-foot p{font-size:var(--fs-xs);color:var(--text-3);}
.drawer-foot .btn{width:100%;}

/* ---------- 分类 Hero ---------- */
.cat-hero{padding:88px 0 72px;position:relative;overflow:hidden;}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(1100px 420px at 78% -10%,rgba(110,138,120,.14),transparent 68%);
  pointer-events:none;
}
.hero-grid{
  display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;
  position:relative;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.12em;color:var(--pine);
  text-transform:uppercase;font-weight:600;
}
.eyebrow .num{
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  background:var(--sand);border:1px solid var(--line);
  padding:2px 8px;border-radius:999px;color:var(--ink);letter-spacing:.08em;
}
h1{
  font-size:var(--fs-h1);font-weight:700;line-height:1.15;
  letter-spacing:-.02em;margin:18px 0 20px;color:var(--ink);
}
.hero-lead{
  font-size:var(--fs-lead);line-height:1.75;color:var(--text-2);max-width:34em;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:0;margin-top:36px;
  border-top:1px solid var(--line);padding-top:22px;
}
.stat{
  padding-right:26px;margin-right:26px;
  border-right:1px solid var(--line);
}
.stat:last-child{border-right:0;margin-right:0;padding-right:0;}
.stat b{
  display:block;font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:24px;font-weight:700;color:var(--ink);line-height:1.2;
}
.stat span{font-size:var(--fs-xs);color:var(--text-3);letter-spacing:.02em;}

.hero-visual{position:relative;}
.hero-frame{
  border:1px solid var(--line);border-radius:var(--r-big);
  overflow:hidden;background:var(--sand);
  aspect-ratio:16/11;
}
.hero-frame img{width:100%;height:100%;object-fit:cover;}
.seal{
  position:absolute;top:-14px;right:-10px;
  width:88px;height:88px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--base);border:1px solid var(--signal);
  color:var(--signal);font-family:var(--mono);font-size:22px;font-weight:700;
  letter-spacing:.06em;
}
.mini-card{
  position:absolute;right:16px;bottom:-26px;width:62%;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);
  padding:16px 18px;
}
.mini-card .tag{font-size:11.5px;}
.mini-card strong{display:block;font-size:15px;font-weight:600;margin:8px 0 4px;color:var(--ink);}
.mini-card em{
  font-style:normal;font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:12.5px;color:var(--text-3);
}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head h2{
  font-size:var(--fs-h2);font-weight:700;line-height:1.25;color:var(--ink);
  letter-spacing:-.01em;position:relative;padding-left:18px;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.22em;width:4px;height:1.1em;background:var(--signal);
  border-radius:2px;
}
.section-head p{margin-top:16px;color:var(--text-2);font-size:15.5px;line-height:1.8;}

/* ---------- 规格卡网格 ---------- */
.spec-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:24px;
}
.spec-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px 26px 22px;
  transition:transform .28s var(--ease),border-color .28s var(--ease),background .28s var(--ease);
}
.spec-card:hover{transform:translateY(-3px);border-color:var(--moss);background:#FDFCFA;}
.spec-card:focus-within{border-color:var(--ink);}
.spec-icon{
  width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line);background:var(--sand);
  display:flex;align-items:center;justify-content:center;
  color:var(--pine);
}
.spec-icon svg{width:20px;height:20px;}
.spec-card h3{
  font-size:var(--fs-h3);font-weight:600;color:var(--ink);
  margin:16px 0 6px;line-height:1.4;
}
.spec-card .spec-desc{font-size:var(--fs-sm);color:var(--text-2);line-height:1.75;margin-bottom:18px;}
.spec-rows{border-top:1px solid var(--line);}
.spec-rows div{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  padding:11px 0;border-bottom:1px solid var(--line);
}
.spec-rows div:last-child{border-bottom:0;padding-bottom:2px;}
.spec-rows dt{font-size:13px;color:var(--text-3);}
.spec-rows dd{
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:13.5px;font-weight:600;color:var(--ink);text-align:right;white-space:nowrap;
}
.spec-note{
  margin-top:28px;display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  font-size:var(--fs-sm);color:var(--text-2);
  background:var(--sand);border:1px solid var(--line);border-radius:var(--r-card);
  padding:14px 20px;
}

/* ---------- 流程 ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step;}
.flow li{
  position:relative;padding-top:26px;border-top:2px solid var(--line);
  transition:border-color .28s var(--ease);
}
.flow li::before{
  content:"";position:absolute;top:-2px;left:0;width:0;height:2px;background:var(--signal);
  transition:width .38s var(--ease);
}
.flow li:hover::before,.flow li:focus-within::before{width:100%;}
.flow .step-num{
  font-family:var(--mono);font-variant-numeric:tabular-nums;
  font-size:12px;letter-spacing:.14em;color:var(--signal);font-weight:700;
}
.flow h3{font-size:17px;font-weight:600;color:var(--ink);margin:10px 0 8px;}
.flow p{font-size:var(--fs-sm);color:var(--text-2);line-height:1.75;}

/* ---------- 适用对象 ---------- */
.split{display:grid;grid-template-columns:6fr 5fr;gap:56px;align-items:center;}
.split-media{
  border-radius:var(--r-big);overflow:hidden;border:1px solid var(--line);
  aspect-ratio:16/10;background:var(--sand);
}
.split-media img{width:100%;height:100%;object-fit:cover;transition:transform .48s var(--ease);}
.split-media:hover img{transform:scale(1.04);}
.split h2{
  font-size:var(--fs-h2);font-weight:700;color:var(--ink);line-height:1.25;
  letter-spacing:-.01em;margin-bottom:16px;
}
.split p{color:var(--text-2);font-size:15.5px;line-height:1.85;}
.check-list{margin-top:24px;display:grid;gap:12px;}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  font-size:15px;color:var(--text);line-height:1.7;
}
.check-list li::before{
  content:"";flex-shrink:0;width:18px;height:18px;margin-top:5px;
  border-radius:50%;border:1px solid var(--pine);
  background:
    linear-gradient(var(--pine),var(--pine)) 5px 9px/6px 1.5px no-repeat,
    linear-gradient(var(--pine),var(--pine)) 10px 6px/1.5px 6px no-repeat;
  transform:rotate(0deg);
}
.check-list li b{font-weight:600;color:var(--ink);}
.inline-link{
  display:inline-flex;align-items:center;gap:8px;margin-top:26px;
  font-size:15px;font-weight:600;color:var(--pine);
  border-bottom:1px solid transparent;padding-bottom:2px;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.inline-link:hover{color:var(--signal);border-color:var(--signal);}
.inline-link svg{width:15px;height:15px;transition:transform .22s var(--ease);}
.inline-link:hover svg{transform:translateX(4px);}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start;}
.faq-aside{position:sticky;top:96px;}
.faq-aside h2{
  font-size:var(--fs-h2);font-weight:700;color:var(--ink);line-height:1.25;letter-spacing:-.01em;
}
.faq-aside p{margin-top:14px;font-size:var(--fs-sm);color:var(--text-2);line-height:1.8;}
.faq-aside .btn{margin-top:24px;}
.faq details{border-top:1px solid var(--line);}
.faq details:last-of-type{border-bottom:1px solid var(--line);}
.faq summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 0;font-size:16px;font-weight:600;color:var(--ink);
  transition:color .22s var(--ease);
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--signal);}
.faq summary::after{
  content:"+";flex-shrink:0;
  font-family:var(--mono);font-size:20px;font-weight:400;line-height:1;color:var(--moss);
  transition:transform .3s var(--ease),color .3s var(--ease);
}
.faq details[open] summary::after{transform:rotate(45deg);color:var(--signal);}
.faq .answer{
  font-size:15px;line-height:1.85;color:var(--text-2);
  max-width:62ch;padding:0 0 20px;
}

/* ---------- CTA ---------- */
.cta{
  background:var(--ink);color:#fff;position:relative;overflow:hidden;
  padding:84px 0;
}
.cta::after{
  content:"J9";position:absolute;right:-30px;bottom:-90px;
  font-family:var(--mono);font-size:260px;font-weight:700;line-height:1;
  color:#fff;opacity:.06;pointer-events:none;
}
.cta-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;position:relative;z-index:1;}
.cta h2{
  font-size:clamp(28px,3.6vw,44px);font-weight:800;line-height:1.15;letter-spacing:-.02em;color:#fff;
}
.cta-side p{font-size:var(--fs-sm);color:rgba(255,255,255,.72);line-height:1.8;margin-bottom:20px;}
.cta-side .btn-primary:hover{box-shadow:0 8px 20px rgba(196,68,28,.4);}
.cta-line{
  display:flex;align-items:center;gap:10px;margin-top:14px;
  font-size:var(--fs-xs);color:rgba(255,255,255,.55);
}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink);color:#E6E2D9;padding:72px 0 0;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:56px;
}
.footer .logo{color:#fff;}
.footer .logo-mark i{background:#fff;}
.footer .logo-mark i:nth-child(3),
.footer .logo-mark i:nth-child(7){background:var(--signal);}
.footer .logo:hover .logo-text{color:var(--signal);}
.footer-brand p{
  margin-top:16px;font-size:var(--fs-sm);line-height:1.8;
  color:#9AA69F;max-width:30ch;
}
.footer-social{display:flex;gap:10px;margin-top:20px;}
.footer-social a{
  width:36px;height:36px;border:1px solid rgba(255,255,255,.18);border-radius:9px;
  display:inline-flex;align-items:center;justify-content:center;color:#C9D0CB;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.footer-social svg{width:17px;height:17px;}
.footer-social a:hover{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.4);}
.footer-col h3{font-size:13px;font-weight:600;color:#fff;letter-spacing:.04em;margin-bottom:14px;}
.footer-col ul{display:flex;flex-direction:column;gap:2px;}
.footer-col a{
  display:inline-block;font-size:var(--fs-sm);color:#8C968F;line-height:2.2;
  transition:color .22s var(--ease),transform .22s var(--ease);
}
.footer-col a:hover{color:#fff;transform:translateX(2px);}
.footer-col .contact-line{font-size:var(--fs-sm);color:#8C968F;line-height:2.2;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 28px;display:flex;flex-wrap:wrap;gap:12px;
  align-items:center;justify-content:space-between;
  font-size:var(--fs-xs);color:#8C968F;
}
.footer-bottom a{color:#8C968F;}
.footer-bottom a:hover{color:#fff;}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .48s var(--ease),transform .48s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 40px;}
}
@media (max-width:1100px){
  .nav{gap:18px;}
  .nav a{font-size:14px;}
  .header-actions .btn{display:none;}
  .hero-grid{grid-template-columns:7fr 5fr;gap:32px;}
}
@media (max-width:1023px){
  .nav{display:none;}
  .burger{display:inline-flex;}
  .header-inner{justify-content:space-between;gap:16px;}
  .container{padding:0 32px;}
  .section{padding:72px 0;}
  .cat-hero{padding:64px 0 56px;}
  .hero-grid{grid-template-columns:1fr;gap:56px;}
  .hero-visual{max-width:560px;}
  .flow{grid-template-columns:repeat(2,1fr);gap:28px;}
  .split{grid-template-columns:1fr;gap:32px;}
  .split-media{order:-1;}
  .faq-grid{grid-template-columns:1fr;gap:32px;}
  .faq-aside{position:static;}
  .cta-grid{grid-template-columns:1fr;gap:28px;}
  .footer-grid{grid-template-columns:1fr 1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1/-1;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .topbar-note{display:none;}
  .topbar-inner{justify-content:flex-end;height:36px;}
  .spec-grid{grid-template-columns:1fr;}
  .flow{grid-template-columns:1fr;}
  .hero-stats{gap:0;}
  .stat{padding-right:18px;margin-right:18px;}
  .stat b{font-size:20px;}
  .mini-card{position:static;width:100%;margin-top:16px;}
  .seal{width:70px;height:70px;font-size:18px;top:-10px;right:-4px;}
  .section{padding:52px 0;}
  .cat-hero{padding:48px 0 44px;}
  .cta{padding:56px 0;}
  .cta::after{font-size:180px;bottom:-60px;}
  .footer{padding-top:52px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .hero-actions .btn{flex:1 1 auto;}
}
@media (max-width:479px){
  .footer-grid{grid-template-columns:1fr;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.001ms!important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --ink:#141B18;
  --pine:#2E4A3E;
  --moss:#6E8A78;
  --base:#F6F3EE;
  --surface:#FFFFFF;
  --sand:#EAE4D9;
  --line:#D9D2C5;
  --signal:#C4441C;
  --signal-dark:#9E3413;
  --text:#1D2622;
  --text-2:#5A6660;
  --text-3:#8C968F;
  --ok:#2F7A52;
  --warn:#B8860B;
  --err:#B03A15;
  --mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --fs-display:clamp(34px,5.2vw,64px);
  --fs-h1:clamp(30px,4vw,48px);
  --fs-h2:clamp(24px,3vw,36px);
  --fs-h3:clamp(18px,2vw,22px);
  --fs-body:16px;
  --fs-lead:18px;
  --fs-sm:14px;
  --fs-xs:12.5px;
  --radius:14px;
  --radius-img:10px;
  --radius-btn:10px;
  --radius-lg:18px;
  --shadow-1:0 1px 2px rgba(20,27,24,.06);
  --shadow-2:0 12px 28px rgba(20,27,24,.10);
  --shadow-3:0 6px 18px rgba(20,27,24,.08);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--base);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:var(--fs-body);
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{display:block;max-width:100%;height:auto;}
a{color:var(--pine);text-decoration:none;transition:color .22s var(--ease);}
a:hover{color:var(--signal);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p,figure{margin:0;}
svg{display:block;}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:4px;}
::selection{background:rgba(196,68,28,.16);}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 56px;}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--ink);color:rgba(255,255,255,.78);}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:38px;}
.topbar-note{font-size:var(--fs-xs);letter-spacing:.01em;color:rgba(255,255,255,.7);}
.topbar-links{display:flex;align-items:center;gap:12px;}
.topbar-links a{font-size:var(--fs-xs);color:rgba(255,255,255,.86);}
.topbar-links a:hover{color:#fff;}
.topbar-divider{width:1px;height:12px;background:rgba(255,255,255,.18);}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--shadow-3);}
.header-inner{display:flex;align-items:center;gap:28px;min-height:72px;}
.logo{display:inline-flex;align-items:center;gap:11px;color:var(--ink);flex:0 0 auto;}
.logo:hover{color:var(--ink);}
.logo-mark{display:grid;grid-template-columns:repeat(3,5px);grid-template-rows:repeat(3,5px);gap:2px;}
.logo-mark i{display:block;width:5px;height:5px;background:var(--ink);border-radius:1.5px;}
.logo-mark i:nth-child(5){background:var(--signal);}
.logo-text{font-size:19px;font-weight:800;letter-spacing:-.01em;white-space:nowrap;}
.nav{display:flex;align-items:center;justify-content:center;gap:26px;flex:1 1 auto;}
.nav a{
  position:relative;padding:8px 0;font-size:14.5px;font-weight:500;
  color:var(--text-2);white-space:nowrap;
}
.nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;
  background:var(--signal);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav a:hover{color:var(--ink);}
.nav a:hover::after{transform:scaleX(1);}
.nav a.is-active{color:var(--ink);font-weight:600;}
.nav a.is-active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.icon-btn{
  width:38px;height:38px;display:grid;place-items:center;
  border:1px solid var(--line);border-radius:999px;
  color:var(--text-2);background:var(--surface);
  transition:color .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.icon-btn:hover{color:var(--ink);border-color:var(--ink);background:var(--sand);}
.icon-btn svg{width:17px;height:17px;}
.menu-btn{
  display:none;width:42px;height:42px;place-items:center;
  border:1px solid var(--line);border-radius:var(--radius-btn);
  color:var(--ink);background:var(--surface);
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
.menu-btn:hover{border-color:var(--ink);background:var(--sand);}
.menu-btn svg{width:19px;height:19px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background .24s var(--ease),color .24s var(--ease),
             border-color .24s var(--ease),transform .24s var(--ease),
             box-shadow .24s var(--ease);
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-primary{background:var(--signal);color:#fff;box-shadow:0 1px 2px rgba(20,27,24,.06);}
.btn-primary:hover{background:var(--signal-dark);color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(196,68,28,.26);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--ink);background:var(--surface);color:var(--ink);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;position:relative;
  font-size:14px;font-weight:600;color:var(--pine);
}
.text-link::after{
  content:"";position:absolute;left:0;right:18px;bottom:-3px;height:1px;
  background:var(--signal);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.text-link:hover{color:var(--signal);}
.text-link:hover::after{transform:scaleX(1);}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:90;
  width:min(86vw,340px);background:var(--surface);
  padding:22px 22px 32px;display:flex;flex-direction:column;gap:4px;
  transform:translateX(102%);transition:transform .32s var(--ease);
  overflow-y:auto;box-shadow:var(--shadow-2);
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line);}
.drawer-head span{font-size:13px;color:var(--text-3);letter-spacing:.04em;}
.drawer a{display:flex;align-items:center;min-height:48px;font-size:15px;color:var(--text);border-bottom:1px solid var(--line);}
.drawer a:hover{color:var(--signal);}
.drawer a.is-active{color:var(--signal);font-weight:600;}
.drawer .btn{margin-top:20px;width:100%;}
.drawer-mask{
  position:fixed;inset:0;z-index:80;background:rgba(20,27,24,.5);
  opacity:0;pointer-events:none;transition:opacity .3s var(--ease);
}
.drawer-mask.is-open{opacity:1;pointer-events:auto;}

/* ---------- 分类首屏 ---------- */
.cat-hero{position:relative;overflow:hidden;padding:44px 0 76px;border-bottom:1px solid var(--line);}
.cat-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(20,27,24,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(20,27,24,.045) 1px,transparent 1px);
  background-size:56px 56px;
}
.cat-hero > .container{position:relative;z-index:1;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:var(--fs-xs);color:var(--text-3);margin-bottom:30px;}
.crumbs a{color:var(--text-3);}
.crumbs a:hover{color:var(--signal);}
.crumbs .sep{color:var(--line);}
.crumbs .current{color:var(--text-2);}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:12px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--pine);
}
.eyebrow .num{
  padding:3px 9px;border:1px solid var(--line);border-radius:999px;
  background:var(--surface);color:var(--signal);font-weight:700;letter-spacing:.06em;
}
.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px;align-items:center;}
.cat-hero h1{
  font-size:var(--fs-h1);font-weight:700;line-height:1.15;
  letter-spacing:-.015em;margin-top:18px;max-width:17em;
}
.lead{font-size:var(--fs-lead);line-height:1.75;color:var(--text-2);margin-top:18px;max-width:34em;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;}
.hero-side{position:relative;}
.hero-figure{
  border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow-1);
}
.hero-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .45s var(--ease);}
.hero-figure:hover img{transform:scale(1.04);}
.hero-tag{
  position:absolute;left:18px;bottom:-18px;
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 14px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);
  font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--pine);
  box-shadow:var(--shadow-1);
}
.hero-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--signal);}

/* ---------- 板块通用 ---------- */
.section{padding:96px 0;}
.section-tight{padding:64px 0;}
.section-head{max-width:660px;margin-bottom:48px;}
.section-head h2{
  position:relative;padding-left:18px;
  font-size:var(--fs-h2);font-weight:700;line-height:1.25;letter-spacing:-.01em;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;
  border-radius:2px;background:var(--signal);
}
.section-head p{margin-top:16px;font-size:15px;line-height:1.8;color:var(--text-2);max-width:64ch;}

/* ---------- 编号清单 + 侧栏图 ---------- */
.split-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:64px;align-items:start;}
.flow-list{border-bottom:1px solid var(--line);}
.flow-item{
  position:relative;padding:26px 0 26px 26px;border-top:1px solid var(--line);
  transition:transform .28s var(--ease);
}
.flow-item::before{
  content:"";position:absolute;left:0;top:26px;bottom:26px;width:3px;
  border-radius:2px;background:var(--signal);
  opacity:0;transform:scaleY(.25);transform-origin:top;
  transition:opacity .28s var(--ease),transform .28s var(--ease);
}
.flow-item:hover,.flow-item:focus-within{transform:translateX(4px);}
.flow-item:hover::before,.flow-item:focus-within::before{opacity:1;transform:scaleY(1);}
.flow-idx{font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;color:var(--moss);font-variant-numeric:tabular-nums;}
.flow-item h3{font-size:var(--fs-h3);font-weight:600;line-height:1.4;margin:6px 0 8px;transition:color .22s var(--ease);}
.flow-item:hover h3{color:var(--pine);}
.flow-item p{font-size:15px;line-height:1.75;color:var(--text-2);max-width:46em;}
.sticky-media{position:sticky;top:104px;}
.sticky-media figure{
  border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow-1);
}
.sticky-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .45s var(--ease);}
.sticky-media figure:hover img{transform:scale(1.04);}
.media-note{
  margin-top:16px;padding:18px 20px;
  background:var(--sand);border:1px solid var(--line);border-radius:var(--radius);
}
.media-note .k{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--pine);}
.media-note p{font-size:14px;line-height:1.75;color:var(--text-2);margin-top:6px;}
.media-note .fig-row{display:flex;align-items:baseline;gap:8px;margin-top:10px;}
.media-note .fig{font-family:var(--mono);font-size:20px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums;}
.media-note .fig-cap{font-size:12.5px;color:var(--text-3);}

/* ---------- 指标条 ---------- */
.metric-band{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  background:var(--sand);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;
}
.metric{padding:24px 26px;border-left:1px solid var(--line);transition:background .24s var(--ease);}
.metric:first-child{border-left:0;}
.metric:hover{background:#F1ECE2;}
.metric .val{font-family:var(--mono);font-size:26px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums;letter-spacing:-.01em;}
.metric .val small{font-size:13px;font-weight:600;color:var(--text-2);margin-left:4px;}
.metric .cap{font-size:13.5px;line-height:1.7;color:var(--text-2);margin-top:6px;}

/* ---------- 场景两栏 ---------- */
.two-col{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:64px;align-items:start;}
.col-head h2{
  position:relative;padding-left:18px;
  font-size:var(--fs-h2);font-weight:700;line-height:1.25;letter-spacing:-.01em;
}
.col-head h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;
  border-radius:2px;background:var(--signal);
}
.col-head p{margin-top:16px;font-size:15px;line-height:1.8;color:var(--text-2);max-width:36ch;}
.scene-list li{
  display:grid;grid-template-columns:22px minmax(0,1fr);gap:14px;
  padding:18px 0;border-top:1px solid var(--line);
  transition:transform .26s var(--ease);
}
.scene-list li:last-child{border-bottom:1px solid var(--line);}
.scene-list li:hover{transform:translateX(4px);}
.scene-list .dot{width:9px;height:9px;border-radius:2px;background:var(--moss);margin-top:11px;transition:background .24s var(--ease);}
.scene-list li:hover .dot{background:var(--signal);}
.scene-list h3{font-size:17px;font-weight:600;line-height:1.5;}
.scene-list p{font-size:14.5px;line-height:1.75;color:var(--text-2);margin-top:4px;}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:64px;align-items:start;}
.faq-aside{position:sticky;top:104px;}
.faq-aside h2{
  position:relative;padding-left:18px;
  font-size:var(--fs-h2);font-weight:700;line-height:1.25;letter-spacing:-.01em;
}
.faq-aside h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;
  border-radius:2px;background:var(--signal);
}
.faq-aside p{margin-top:16px;font-size:15px;line-height:1.8;color:var(--text-2);}
.faq-aside .text-link{margin-top:20px;}
.faq-item{border-top:1px solid var(--line);}
.faq-item:last-child{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:20px 0;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);line-height:1.6;
  transition:color .22s var(--ease);
}
.faq-q:hover{color:var(--signal);}
.faq-q .plus{
  position:relative;flex:0 0 auto;width:20px;height:20px;
  color:var(--text-2);
  transition:transform .3s var(--ease),color .3s var(--ease);
}
.faq-q .plus::before,.faq-q .plus::after{content:"";position:absolute;background:currentColor;border-radius:2px;}
.faq-q .plus::before{left:0;right:0;top:9px;height:2px;}
.faq-q .plus::after{top:0;bottom:0;left:9px;width:2px;}
.faq-item.is-open .faq-q{color:var(--ink);}
.faq-item.is-open .plus{transform:rotate(45deg);color:var(--signal);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);}
.faq-a p{padding:0 0 20px;font-size:15px;line-height:1.8;color:var(--text-2);max-width:62ch;}

/* ---------- 转化条 ---------- */
.cta{position:relative;overflow:hidden;background:var(--ink);color:#fff;padding:84px 0;}
.cta::after{
  content:"09";position:absolute;right:-12px;bottom:-70px;
  font-family:var(--mono);font-weight:800;line-height:1;
  font-size:clamp(170px,22vw,260px);color:rgba(255,255,255,.06);
  pointer-events:none;user-select:none;
}
.cta-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px;align-items:center;}
.cta h2{font-size:clamp(28px,3.4vw,44px);font-weight:800;line-height:1.15;letter-spacing:-.015em;color:#fff;}
.cta-side p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);margin-bottom:18px;}
.cta-side .btn-primary{box-shadow:0 8px 20px rgba(196,68,28,.24);}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink);color:rgba(255,255,255,.78);padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1.15fr;gap:40px;}
.footer .logo{color:#fff;}
.footer .logo:hover{color:#fff;}
.footer .logo-mark i{background:rgba(255,255,255,.85);}
.footer .logo-mark i:nth-child(5){background:var(--signal);}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:var(--text-3);max-width:30ch;}
.footer-social{display:flex;gap:10px;margin-top:20px;}
.footer-social a{
  width:36px;height:36px;display:grid;place-items:center;
  border:1px solid rgba(255,255,255,.16);border-radius:999px;
  color:rgba(255,255,255,.7);
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.footer-social a:hover{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.36);}
.footer-social svg{width:16px;height:16px;}
.footer-col h3{font-size:13px;font-weight:600;color:#fff;letter-spacing:.02em;margin-bottom:14px;}
.footer-col ul li a{
  display:inline-block;font-size:14px;line-height:2.2;color:var(--text-3);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-col ul li a:hover{color:#fff;transform:translateX(2px);}
.footer-contact p{font-size:14px;line-height:1.9;color:var(--text-3);}
.footer-contact .num{font-family:var(--mono);font-size:15px;color:#fff;letter-spacing:.02em;}
.footer-bottom{
  margin-top:56px;padding:20px 0;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:var(--fs-xs);color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:#fff;}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 40px;}
  .hero-grid{gap:40px;}
  .split-grid,.two-col,.faq-grid,.cta-grid{gap:44px;}
  .nav{gap:20px;}
}
@media (max-width:1023px){
  .container{padding:0 40px;}
  .nav{display:none;}
  .menu-btn{display:grid;}
  .icon-btn{display:none;}
  .header-inner{justify-content:space-between;gap:16px;}
  .cat-hero{padding:34px 0 60px;}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:36px;}
  .hero-side{max-width:560px;}
  .hero-tag{position:static;margin-top:14px;box-shadow:none;}
  .section{padding:72px 0;}
  .section-tight{padding:48px 0;}
  .split-grid{grid-template-columns:minmax(0,1fr);gap:40px;}
  .sticky-media{position:static;order:2;max-width:560px;}
  .metric-band{grid-template-columns:repeat(2,minmax(0,1fr));}
  .metric:nth-child(3){border-left:0;}
  .metric:nth-child(n+3){border-top:1px solid var(--line);}
  .two-col{grid-template-columns:minmax(0,1fr);gap:32px;}
  .col-head p{max-width:56ch;}
  .faq-grid{grid-template-columns:minmax(0,1fr);gap:32px;}
  .faq-aside{position:static;}
  .cta-grid{grid-template-columns:minmax(0,1fr);gap:32px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .topbar-note{display:none;}
  .topbar-inner{justify-content:flex-end;}
  .header-inner{min-height:64px;}
  .logo-text{font-size:17px;}
  .cat-hero{padding:26px 0 46px;}
  .crumbs{margin-bottom:22px;}
  .cat-hero h1{font-size:clamp(25px,6.6vw,34px);max-width:none;}
  .lead{font-size:16px;}
  .section{padding:48px 0;}
  .section-tight{padding:36px 0;}
  .section-head{margin-bottom:32px;}
  .section-head h2,.col-head h2,.faq-aside h2{font-size:clamp(22px,5.6vw,28px);}
  .flow-item{padding:20px 0 20px 20px;}
  .flow-item::before{top:20px;bottom:20px;}
  .metric{padding:20px;}
  .metric .val{font-size:22px;}
  .footer{padding:48px 0 0;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-brand{grid-column:1 / -1;}
  .footer-bottom{margin-top:36px;}
  .cta{padding:56px 0;}
}
@media (max-width:519px){
  .hero-actions .btn{width:100%;}
  .metric-band{grid-template-columns:minmax(0,1fr);}
  .metric{border-left:0;}
  .metric + .metric{border-top:1px solid var(--line);}
  .footer-grid{grid-template-columns:1fr;}
  .faq-q{font-size:15px;gap:16px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
  .flow-item:hover,.scene-list li:hover{transform:none;}
  .hero-figure:hover img,.sticky-media figure:hover img{transform:none;}
}

/* roulang page: category4 */
:root{
  --ink:#141B18;
  --pine:#2E4A3E;
  --moss:#6E8A78;
  --base:#F6F3EE;
  --surface:#FFFFFF;
  --sand:#EAE4D9;
  --line:#D9D2C5;
  --signal:#C4441C;
  --signal-dark:#9E3413;
  --text:#1D2622;
  --text-2:#5A6660;
  --text-3:#8C968F;
  --ok:#2F7A52;
  --warn:#B8860B;
  --err:#B03A15;

  --fs-display:clamp(34px,5.2vw,64px);
  --fs-h1:clamp(30px,4vw,48px);
  --fs-h2:clamp(24px,3vw,36px);
  --fs-h3:clamp(18px,2vw,22px);
  --fs-body:16px;
  --fs-lead:18px;
  --fs-sm:14px;
  --fs-xs:12.5px;

  --r-card:14px;
  --r-img:10px;
  --r-btn:10px;
  --r-input:10px;
  --r-big:18px;
  --r-pill:999px;

  --sh-1:0 1px 2px rgba(20,27,24,.06);
  --sh-2:0 12px 28px rgba(20,27,24,.10);
  --sh-nav:0 6px 18px rgba(20,27,24,.08);
  --sh-signal:0 8px 20px rgba(196,68,28,.26);

  --ease:cubic-bezier(.2,.7,.3,1);
  --w:1180px;
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--base);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:var(--fs-body);
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:4px}
::selection{background:rgba(196,68,28,.16)}

.container{
  width:100%;
  max-width:var(--w);
  margin:0 auto;
  padding:0 56px;
}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--ink);color:#E7E3DA;font-size:var(--fs-xs);height:38px;display:flex;align-items:center}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%}
.topbar-note{color:#B9C2BB;letter-spacing:.02em}
.topbar-links{display:flex;align-items:center;gap:14px}
.topbar-links a{color:#E7E3DA;transition:color .22s var(--ease)}
.topbar-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.topbar-links span[aria-hidden]{width:1px;height:12px;background:rgba(255,255,255,.18)}
.topbar-domain{font-family:var(--mono);color:#9AA39C;letter-spacing:.04em}

/* ---------- 主导航 ---------- */
.header{
  position:sticky;top:0;z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .28s var(--ease);
}
.header.is-stuck{box-shadow:var(--sh-nav)}
.header-inner{
  display:flex;align-items:center;gap:28px;
  height:72px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex:none}
.logo-mark{
  display:grid;grid-template-columns:repeat(3,1fr);gap:2px;
  width:26px;height:26px;flex:none;
}
.logo-mark i{background:var(--ink);border-radius:2px;display:block}
.logo-mark i:nth-child(5){background:var(--signal)}
.logo-text{
  font-weight:800;font-size:18px;letter-spacing:-.01em;color:var(--ink);
  white-space:nowrap;
}
.nav{
  display:flex;align-items:center;gap:26px;margin-left:12px;flex:1;
}
.nav a{
  position:relative;
  font-size:14.5px;font-weight:500;color:var(--text-2);
  padding:8px 0;line-height:1.2;
  transition:color .22s var(--ease);
  white-space:nowrap;
}
.nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--signal);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav a:hover{color:var(--ink)}
.nav a:hover::after{transform:scaleX(1)}
.nav a.is-active{color:var(--ink);font-weight:600}
.nav a.is-active::after{transform:scaleX(1);background:var(--ink)}
.header-actions{display:flex;align-items:center;gap:12px;flex:none}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-btn);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--text-2);border:1px solid transparent;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.icon-btn:hover{background:var(--sand);color:var(--ink);border-color:var(--line)}
.icon-btn svg{width:18px;height:18px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease),transform .18s var(--ease);
  min-width:44px;
}
.btn-primary{background:var(--signal);color:#fff}
.btn-primary:hover{background:var(--signal-dark);box-shadow:var(--sh-signal);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);background:var(--signal-dark)}
.btn-outline{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-outline:hover{border-color:var(--ink);background:var(--sand)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink);background:var(--sand)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none}

.header .btn-primary{height:40px;padding:0 18px;font-size:14px}

.hamburger{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  align-items:center;justify-content:center;color:var(--ink);
  border:1px solid var(--line);background:var(--surface);
}
.hamburger svg{width:20px;height:20px}
.hamburger:hover{background:var(--sand)}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,27,24,.5);
  opacity:0;visibility:hidden;transition:opacity .28s var(--ease),visibility .28s var(--ease);
  z-index:80;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(360px,86vw);
  background:var(--surface);z-index:90;
  transform:translateX(100%);transition:transform .32s var(--ease);
  display:flex;flex-direction:column;
  padding:20px 22px 28px;overflow-y:auto;
  box-shadow:-12px 0 32px rgba(20,27,24,.16);
}
.drawer.is-open{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-close{
  width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--ink);
}
.drawer-close:hover{background:var(--sand)}
.drawer-nav{display:flex;flex-direction:column;margin-bottom:20px}
.drawer-nav a{
  display:flex;align-items:center;min-height:48px;
  font-size:15px;font-weight:500;color:var(--text);
  border-bottom:1px solid var(--line);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.drawer-nav a:hover{color:var(--signal);padding-left:4px}
.drawer-nav a.is-active{color:var(--signal);font-weight:600}
.drawer-foot{margin-top:auto;display:grid;gap:12px;padding-top:16px}
.drawer-foot p{font-size:var(--fs-xs);color:var(--text-3);line-height:1.7}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section-sand{background:var(--sand)}
.section-tight{padding:64px 0}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:32px;
  margin-bottom:48px;
}
.section-head h2{
  font-size:var(--fs-h2);font-weight:700;line-height:1.25;color:var(--ink);
  letter-spacing:-.01em;
}
.section-head h2::before{
  content:"";display:block;width:36px;height:3px;background:var(--signal);
  border-radius:2px;margin-bottom:16px;
}
.section-note{max-width:34ch;font-size:var(--fs-sm);color:var(--text-2);line-height:1.75}
.eyebrow{
  font-family:var(--mono);font-size:12px;letter-spacing:.12em;
  color:var(--pine);text-transform:uppercase;margin-bottom:14px;
}

/* ---------- 分类 Hero ---------- */
.page-hero{
  padding:76px 0 88px;
  background:
    linear-gradient(180deg,rgba(246,243,238,0) 0%,rgba(246,243,238,.6) 100%),
    var(--base);
  border-bottom:1px solid var(--line);
  position:relative;overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(20,27,24,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(20,27,24,.04) 1px,transparent 1px);
  background-size:56px 56px;
  pointer-events:none;
}
.page-hero-grid{
  position:relative;
  display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:start;
}
.page-hero-main h1{
  font-size:var(--fs-h1);font-weight:700;line-height:1.15;
  letter-spacing:-.02em;color:var(--ink);max-width:20ch;
}
.lead{
  margin-top:20px;font-size:var(--fs-lead);line-height:1.75;
  color:var(--text-2);max-width:48ch;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.metric-row{
  display:flex;align-items:stretch;gap:0;margin-top:44px;
  border-top:1px solid var(--line);padding-top:24px;
}
.metric{
  flex:1;padding:0 22px;border-left:1px solid var(--line);
}
.metric:first-child{border-left:0;padding-left:0}
.metric b{
  display:block;font-family:var(--mono);font-size:24px;font-weight:700;
  color:var(--ink);line-height:1.2;letter-spacing:-.01em;
}
.metric span{display:block;margin-top:6px;font-size:var(--fs-xs);color:var(--text-3)}

.hero-aside{position:relative;padding-bottom:12px}
.hero-figure{
  border-radius:var(--r-big);overflow:hidden;border:1px solid var(--line);
  background:var(--surface);box-shadow:var(--sh-1);
}
.hero-figure img{width:100%;height:auto;aspect-ratio:16/10;object-fit:cover}
.hero-caption{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px 16px;border-top:1px solid var(--line);background:var(--surface);
  font-size:var(--fs-xs);color:var(--text-2);
}
.hero-caption .mono{color:var(--pine);font-weight:700}
.hero-stamp{
  position:absolute;right:-10px;top:-26px;width:88px;height:88px;border-radius:50%;
  border:1px solid var(--line);background:var(--base);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  color:var(--signal);font-family:var(--mono);font-weight:700;
  box-shadow:var(--sh-1);
}
.hero-stamp b{font-size:22px;line-height:1}
.hero-stamp span{font-size:10px;letter-spacing:.14em;color:var(--text-3);margin-top:4px}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;padding-left:0}
.timeline::before{
  content:"";position:absolute;left:7px;top:10px;bottom:10px;
  width:1px;background:var(--line);
}
.timeline-item{
  position:relative;padding:0 0 44px 52px;
  transition:transform .24s var(--ease);
}
.timeline-item:last-child{padding-bottom:0}
.timeline-dot{
  position:absolute;left:0;top:8px;width:15px;height:15px;border-radius:50%;
  background:var(--base);border:1px solid var(--moss);
  transition:background .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.timeline-item.is-current .timeline-dot{
  background:var(--signal);border-color:var(--signal);
  box-shadow:0 0 0 4px rgba(196,68,28,.12);
}
.timeline-item:hover{transform:translateX(4px)}
.timeline-item:hover .timeline-dot{background:var(--pine);border-color:var(--pine)}
.timeline-num{
  font-family:var(--mono);font-size:13px;font-weight:700;letter-spacing:.1em;
  color:var(--moss);margin-bottom:8px;
}
.timeline-item.is-current .timeline-num{color:var(--signal)}
.timeline-body h3{
  font-size:var(--fs-h3);font-weight:600;color:var(--ink);line-height:1.4;
}
.timeline-body p{
  margin-top:10px;font-size:15px;line-height:1.8;color:var(--text-2);max-width:62ch;
}
.timeline-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:var(--r-pill);border:1px solid var(--line);background:var(--surface);
  font-size:var(--fs-xs);color:var(--pine);font-weight:500;
}

/* ---------- 渠道卡 ---------- */
.channel-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:stretch}
.channel-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-1);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
  display:flex;flex-direction:column;
}
.channel-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--moss)}
.channel-card h3{font-size:var(--fs-h3);font-weight:600;color:var(--ink)}
.channel-card p{margin-top:12px;font-size:15px;line-height:1.8;color:var(--text-2)}
.channel-card-wide{position:relative;overflow:hidden}
.channel-card-wide .channel-figure{
  border-radius:var(--r-img);overflow:hidden;margin-bottom:22px;
  border:1px solid var(--line);
}
.channel-card-wide .channel-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .38s var(--ease)}
.channel-card-wide:hover .channel-figure img{transform:scale(1.04)}
.channel-side{display:grid;gap:24px}
.channel-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:18px;border-top:1px solid var(--line);
  font-size:var(--fs-xs);color:var(--text-3);
}
.channel-meta .mono{color:var(--pine);font-weight:700}
.textlink{
  display:inline-flex;align-items:center;gap:6px;font-size:var(--fs-sm);
  font-weight:600;color:var(--pine);position:relative;
  transition:color .22s var(--ease);
}
.textlink::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;
  background:var(--signal);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.textlink:hover{color:var(--signal)}
.textlink:hover::after{transform:scaleX(1)}
.textlink svg{width:14px;height:14px;transition:transform .22s var(--ease)}
.textlink:hover svg{transform:translateX(4px)}

/* ---------- 保障条 ---------- */
.assure{
  background:var(--sand);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:18px 0;
}
.assure-row{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.assure-item{
  display:flex;gap:10px;align-items:flex-start;padding:0 20px;border-left:1px solid var(--line);
}
.assure-item:first-child{border-left:0;padding-left:0}
.assure-item svg{width:18px;height:18px;color:var(--pine);flex:none;margin-top:4px}
.assure-item b{display:block;font-size:13.5px;font-weight:600;color:var(--ink);line-height:1.5}
.assure-item span{display:block;font-size:12px;color:var(--text-3);line-height:1.6}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start}
.faq-side{position:sticky;top:104px}
.faq-side h2{font-size:var(--fs-h2);font-weight:700;line-height:1.25;color:var(--ink)}
.faq-side h2::before{
  content:"";display:block;width:36px;height:3px;background:var(--signal);
  border-radius:2px;margin-bottom:16px;
}
.faq-side p{margin-top:16px;font-size:var(--fs-sm);color:var(--text-2);line-height:1.8;max-width:30ch}
.faq-item{
  border-top:1px solid var(--line);
  background:transparent;
}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 0;font-size:16px;font-weight:600;color:var(--ink);line-height:1.6;
  transition:color .22s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";flex:none;width:20px;text-align:center;
  font-size:22px;font-weight:400;color:var(--moss);line-height:1;
  transition:transform .3s var(--ease),color .3s var(--ease);
}
.faq-item[open] summary{color:var(--signal)}
.faq-item[open] summary::after{transform:rotate(45deg);color:var(--signal)}
.faq-item summary:hover{color:var(--pine)}
.faq-body{padding:0 0 20px;max-width:62ch;font-size:15px;line-height:1.8;color:var(--text-2)}

/* ---------- 联系小卡 ---------- */
.contact-card{
  display:grid;grid-template-columns:8fr 4fr;gap:32px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:36px;box-shadow:var(--sh-1);margin-top:56px;
}
.contact-card h3{font-size:var(--fs-h3);font-weight:600;color:var(--ink)}
.contact-card p{margin-top:12px;font-size:15px;line-height:1.8;color:var(--text-2);max-width:56ch}
.contact-actions{display:grid;gap:12px}
.contact-actions .mono{font-size:var(--fs-xs);color:var(--text-3);text-align:center}

/* ---------- CTA ---------- */
.cta{
  background:var(--ink);color:#fff;position:relative;overflow:hidden;
  padding:80px 0;
}
.cta-watermark{
  position:absolute;right:-30px;top:50%;transform:translateY(-50%);
  font-family:var(--mono);font-weight:800;line-height:1;
  font-size:clamp(180px,22vw,260px);color:#fff;opacity:.06;
  pointer-events:none;user-select:none;
}
.cta-grid{
  position:relative;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;
}
.cta h2{
  font-size:clamp(28px,3.6vw,44px);font-weight:800;line-height:1.14;
  letter-spacing:-.02em;color:#fff;
}
.cta-right p{
  font-size:var(--fs-sm);color:#B9C2BB;line-height:1.8;margin-bottom:20px;
}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink);color:#E7E3DA;padding:72px 0 0}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:56px;
}
.footer-brand .logo-text{color:#fff}
.footer-brand .logo-mark i{background:#fff}
.footer-brand .logo-mark i:nth-child(5){background:var(--signal)}
.footer-brand p{
  margin-top:16px;font-size:var(--fs-sm);line-height:1.8;color:#9AA39C;max-width:26ch;
}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social a{
  width:38px;height:38px;border-radius:var(--r-btn);
  border:1px solid rgba(255,255,255,.16);
  display:inline-flex;align-items:center;justify-content:center;color:#B9C2BB;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.footer-social a svg{width:17px;height:17px}
.footer-social a:hover{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.32)}
.footer-col h3{
  font-size:13px;font-weight:600;color:#fff;letter-spacing:.06em;margin-bottom:16px;
}
.footer-col ul li{line-height:2.2}
.footer-col a{
  font-size:var(--fs-sm);color:#9AA39C;
  transition:color .22s var(--ease),padding-left .22s var(--ease);
}
.footer-col a:hover{color:#fff;padding-left:2px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:var(--fs-xs);color:#8C968F;
}
.footer-bottom .mono{color:#6E8A78}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .46s var(--ease),transform .46s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
  .channel-card:hover,.timeline-item:hover{transform:none}
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 40px}
  .page-hero-grid{gap:40px}
  .section{padding:80px 0}
}
@media (max-width:1023px){
  .nav{display:none}
  .hamburger{display:inline-flex}
  .header-actions .btn-primary{display:none}
  .page-hero-grid{grid-template-columns:1fr;gap:36px}
  .page-hero{padding:56px 0 64px}
  .hero-aside{max-width:560px}
  .hero-stamp{right:8px;top:-18px;width:72px;height:72px}
  .hero-stamp b{font-size:18px}
  .channel-grid{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr;gap:32px}
  .faq-side{position:static}
  .cta-grid{grid-template-columns:1fr;gap:28px}
  .contact-card{grid-template-columns:1fr;gap:24px}
  .footer-grid{grid-template-columns:1fr 1fr 1fr;gap:32px}
  .assure-row{grid-template-columns:repeat(2,1fr);gap:18px 0}
  .assure-item:nth-child(3){border-left:0;padding-left:0}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .topbar-note{display:none}
  .topbar-inner{justify-content:flex-end}
  .section{padding:48px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:32px}
  .section-note{max-width:100%}
  .metric-row{flex-direction:column;gap:18px}
  .metric{border-left:0;padding:0;border-top:1px solid var(--line);padding-top:14px}
  .metric:first-child{border-top:0;padding-top:0}
  .timeline-item{padding-left:40px}
  .contact-card{padding:24px}
  .cta{padding:56px 0}
  .footer{padding-top:48px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1/-1}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .channel-card{padding:22px}
}
@media (max-width:519px){
  .footer-grid{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .assure-row{grid-template-columns:1fr}
  .assure-item{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:14px}
  .assure-item:first-child{border-top:0;padding-top:0}
  .hero-stamp{display:none}
}