/* roulang page: index */
:root{
  --c-ink:#20242A;
  --c-ink-2:#14171B;
  --c-orange:#B84A18;
  --c-orange-h:#9C3D13;
  --c-orange-l:#FBEFE8;
  --c-steel:#2F5D62;
  --c-steel-l:#E7EFEF;
  --c-bg:#F6F4F0;
  --c-card:#FFFFFF;
  --c-sub:#EDEAE4;
  --c-text:#1C2025;
  --c-body:#333A41;
  --c-muted:#5E6670;
  --c-weak:#8A9099;
  --c-line:#E1DDD5;
  --c-line-2:#D6D0C6;
  --c-reverse:#EDEFF1;
  --c-ok:#2E7D5B;
  --c-err:#B42318;
  --r-card:8px;
  --r-btn:6px;
  --r-tag:4px;
  --sh-1:0 1px 2px rgba(32,36,42,.05);
  --sh-2:0 10px 24px rgba(32,36,42,.10);
  --w:1200px;
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--c-body);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .18s ease;}
button{font:inherit;cursor:pointer;}
h1,h2,h3,h4{margin:0;color:var(--c-text);font-weight:700;line-height:1.3;}
h1{font-size:42px;line-height:1.25;letter-spacing:-.5px;}
h2{font-size:30px;line-height:1.35;letter-spacing:-.3px;}
h3{font-size:21px;line-height:1.45;font-weight:500;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
figure{margin:0;}
input,select,textarea{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--c-orange);outline-offset:2px;}
.container{width:100%;max-width:var(--w);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section-alt{background:var(--c-sub);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px;flex-wrap:wrap;}
.section-no{
  display:inline-flex;align-items:center;gap:10px;
  font-family:"Barlow Condensed","Inter",sans-serif;
  font-size:13px;letter-spacing:.16em;color:var(--c-orange);
  font-weight:700;margin-bottom:10px;
}
.section-no::after{content:"";display:block;width:28px;height:2px;background:var(--c-orange);}
.section-lead{max-width:640px;color:var(--c-muted);font-size:16.5px;margin-top:12px;}
.link-more{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14.5px;font-weight:500;color:var(--c-ink);
  border-bottom:1px solid var(--c-line-2);padding-bottom:3px;
}
.link-more:hover{color:var(--c-orange);border-bottom-color:var(--c-orange);}
.link-more span{transition:transform .18s ease;}
.link-more:hover span{transform:translateX(3px);}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:#fff;border-bottom:1px solid var(--c-line);
  transition:box-shadow .2s ease;
}
.site-header.is-stuck{box-shadow:0 2px 10px rgba(0,0,0,.06);}
.header-inner{
  max-width:var(--w);margin:0 auto;padding:0 24px;
  height:70px;display:flex;align-items:center;gap:26px;
}
.logo{display:flex;align-items:center;gap:10px;flex:none;}
.logo-mark{
  width:30px;height:30px;border-radius:3px;flex:none;
  background:
    linear-gradient(135deg,var(--c-ink) 0 62%,transparent 62%),
    linear-gradient(180deg,#3A4048,#1C2025);
  position:relative;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.08);
}
.logo-mark::after{
  content:"";position:absolute;left:6px;top:13px;width:18px;height:2px;background:var(--c-orange);
}
.logo-text{font-size:19px;font-weight:700;color:var(--c-ink);letter-spacing:.5px;white-space:nowrap;}
.logo-text em{font-style:normal;color:var(--c-orange);}
.main-nav{flex:1 1 auto;min-width:0;}
.main-nav > ul{display:flex;align-items:center;gap:4px;}
.main-nav > ul > li{position:relative;}
.main-nav > ul > li > a{
  display:inline-flex;align-items:center;height:70px;padding:0 14px;
  font-size:15px;color:var(--c-body);font-weight:500;
  border-bottom:3px solid transparent;
}
.main-nav > ul > li > a:hover{color:var(--c-orange);}
.main-nav > ul > li > a.is-active{color:var(--c-ink);border-bottom-color:var(--c-orange);}
.has-mega > a::after{
  content:"";width:6px;height:6px;margin-left:7px;
  border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;
  transform:rotate(45deg) translateY(-2px);opacity:.6;
}
.header-cta{flex:none;display:flex;align-items:center;gap:10px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:500;border:1px solid transparent;
  transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--c-ink);color:#fff;}
.btn-primary:hover{background:var(--c-ink-2);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{background:#fff;color:var(--c-ink);border-color:var(--c-line-2);}
.btn-outline:hover{border-color:var(--c-ink);color:var(--c-orange);}
.btn-ghost{background:transparent;color:var(--c-reverse);border-color:rgba(255,255,255,.28);}
.btn-ghost:hover{border-color:var(--c-orange);color:#fff;}
.btn .arw{font-family:"Barlow Condensed",sans-serif;color:var(--c-orange);font-weight:700;}
.btn-primary .arw{color:#F0A46F;}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}

/* mega */
.mega{
  position:absolute;top:calc(100% + 1px);right:-60px;width:860px;
  background:#fff;border:1px solid var(--c-line);border-top:2px solid var(--c-orange);
  border-radius:0 0 var(--r-card) var(--r-card);
  box-shadow:var(--sh-2);
  padding:26px 26px 0;
  opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity .16s ease,transform .16s ease,visibility .16s;
  z-index:130;
}
.has-mega:hover .mega,.has-mega:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0);}
.mega-grid{display:grid;grid-template-columns:1.15fr 1fr .92fr;gap:26px;}
.mega-col-title{
  font-size:13px;color:var(--c-weak);font-weight:700;letter-spacing:.1em;
  margin-bottom:14px;text-transform:uppercase;
}
.mega-links{display:grid;grid-template-columns:1fr 1fr;gap:2px 14px;}
.mega-links a{
  display:flex;align-items:center;gap:9px;
  font-size:14.5px;color:var(--c-body);padding:6px 0;line-height:1.4;
}
.mega-links a i{
  width:8px;height:8px;background:var(--c-orange);flex:none;border-radius:1px;
  opacity:.75;transition:opacity .18s ease;
}
.mega-links a:hover{color:var(--c-orange);}
.mega-links a:hover i{opacity:1;}
.mega-posts li + li{border-top:1px solid var(--c-line);}
.mega-posts a{display:block;padding:9px 0;}
.mega-posts .mt{font-size:14.5px;color:var(--c-body);line-height:1.5;display:block;}
.mega-posts .md{font-size:12.5px;color:var(--c-weak);font-family:"Barlow Condensed",sans-serif;letter-spacing:.04em;}
.mega-posts a:hover .mt{color:var(--c-orange);}
.mega-card{border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;background:var(--c-card);}
.mega-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.mega-card-body{padding:10px 12px 12px;}
.mega-card-body span{display:block;font-size:14px;font-weight:500;color:var(--c-text);line-height:1.4;}
.mega-card-body em{font-style:normal;font-size:12.5px;color:var(--c-orange);display:inline-flex;gap:4px;margin-top:6px;}
.mega-foot{
  margin:22px -26px 0;padding:12px 26px;
  background:var(--c-sub);border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13.5px;color:var(--c-muted);border-radius:0 0 var(--r-card) var(--r-card);
}
.mega-foot strong{color:var(--c-ink);font-family:"Barlow Condensed",sans-serif;font-size:16px;letter-spacing:.04em;}
.mega-foot a{color:var(--c-orange);font-weight:500;}

/* mobile nav */
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--c-line);background:#fff;
  border-radius:var(--r-btn);align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle i{display:block;width:18px;height:2px;background:var(--c-ink);transition:transform .2s ease,opacity .2s ease;}
.nav-toggle[aria-expanded="true"] i:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] i:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] i:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,23,27,.45);
  opacity:0;visibility:hidden;transition:opacity .22s ease,visibility .22s;z-index:140;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:86%;max-width:360px;z-index:150;
  background:#fff;transform:translateX(100%);transition:transform .26s ease;
  display:flex;flex-direction:column;box-shadow:-10px 0 30px rgba(0,0,0,.14);
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--c-line);}
.drawer-close{width:40px;height:40px;border:1px solid var(--c-line);background:#fff;border-radius:var(--r-btn);font-size:18px;line-height:1;color:var(--c-ink);}
.drawer-body{flex:1;overflow-y:auto;padding:10px 18px 24px;}
.drawer-body a.d-link{
  display:block;padding:14px 2px;font-size:15.5px;color:var(--c-body);
  border-bottom:1px solid var(--c-line);font-weight:500;
}
.drawer-body a.d-link.is-active{color:var(--c-orange);}
.drawer-foot{padding:16px 18px;border-top:1px solid var(--c-line);background:var(--c-sub);}

/* ---------- hero ---------- */
.hero{background:var(--c-bg);padding:56px 0 0;}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-tag);
  padding:6px 12px;font-size:13px;color:var(--c-steel);font-weight:500;letter-spacing:.02em;
}
.hero-badge::before{content:"";width:6px;height:6px;background:var(--c-steel);border-radius:1px;}
.hero h1{margin:20px 0 16px;}
.hero h1 mark{background:none;color:var(--c-orange);padding:0;}
.hero-sub{font-size:18px;line-height:1.7;color:var(--c-muted);max-width:36em;}
.hero-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap;}
.hero-note{font-size:13px;color:var(--c-weak);margin-top:14px;}
.hero-visual{position:relative;border-radius:var(--r-card);overflow:hidden;background:var(--c-ink);}
.hero-visual img{width:100%;aspect-ratio:16/11;object-fit:cover;}
.hero-visual::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(20,23,27,.72),rgba(20,23,27,.18));
  pointer-events:none;
}
.hero-visual .img-fallback{
  position:absolute;inset:0;display:none;align-items:center;justify-content:center;
  color:rgba(255,255,255,.55);font-size:13px;
  background:repeating-linear-gradient(45deg,#20242A 0 12px,#242930 12px 24px);
}
.hero-stat{
  position:absolute;left:20px;bottom:20px;z-index:2;
  background:rgba(255,255,255,.96);border-radius:var(--r-card);
  padding:12px 18px;box-shadow:var(--sh-2);
  display:flex;gap:22px;
}
.hero-stat div{line-height:1.25;}
.hero-stat b{font-family:"Barlow Condensed","Inter",sans-serif;font-size:26px;color:var(--c-ink);letter-spacing:.02em;}
.hero-stat small{display:block;font-size:12px;color:var(--c-muted);letter-spacing:.02em;}

.trust-bar{background:var(--c-ink);margin-top:52px;}
.trust-inner{
  max-width:var(--w);margin:0 auto;padding:0 24px;
  display:grid;grid-template-columns:repeat(4,1fr);
}
.trust-item{
  display:flex;align-items:center;gap:12px;
  padding:18px 20px;color:var(--c-reverse);font-size:14.5px;
  border-left:1px solid rgba(255,255,255,.12);
}
.trust-item:first-child{border-left:0;padding-left:0;}
.trust-item b{font-weight:500;color:#fff;}
.trust-item span.i{
  font-family:"Barlow Condensed",sans-serif;font-size:13px;font-weight:700;
  color:var(--c-orange);letter-spacing:.08em;flex:none;
}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:1.15fr 1fr .95fr;gap:0;margin-top:8px;position:relative;}
.steps::before{
  content:"";position:absolute;left:0;right:0;top:19px;height:1px;
  background:repeating-linear-gradient(90deg,var(--c-line-2) 0 8px,transparent 8px 16px);
}
.step{padding:0 30px 0 0;position:relative;}
.step-dot{
  width:38px;height:38px;border-radius:50%;background:var(--c-orange);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-family:"Barlow Condensed",sans-serif;font-size:17px;font-weight:700;
  position:relative;z-index:2;box-shadow:0 0 0 6px var(--c-bg);
}
.section-alt .step-dot{box-shadow:0 0 0 6px var(--c-sub);}
.step h3{margin:20px 0 8px;font-size:20px;font-weight:500;}
.step p{font-size:15px;color:var(--c-muted);line-height:1.8;max-width:32em;}
.step .deliver{
  display:inline-block;margin-top:14px;font-size:12.5px;color:var(--c-steel);
  background:var(--c-steel-l);border-radius:var(--r-tag);padding:3px 9px;
}

/* ---------- cases ---------- */
.case-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:var(--gap);}
.case-card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:box-shadow .22s ease,border-color .22s ease,transform .22s ease;
}
.case-card:hover{box-shadow:var(--sh-2);border-color:var(--c-line-2);}
.case-card .media{overflow:hidden;background:var(--c-ink);}
.case-card .media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .3s ease;}
.case-card:hover .media img{transform:scale(1.03);}
.case-card.big{grid-row:span 2;}
.case-card.big .media img{aspect-ratio:16/10;}
.case-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.case-body .tag{align-self:flex-start;}
.case-body h3{font-size:19px;line-height:1.45;}
.case-card.big .case-body h3{font-size:24px;}
.case-body p{font-size:14.5px;color:var(--c-muted);line-height:1.75;}
.case-result{display:flex;align-items:baseline;gap:10px;margin-top:auto;padding-top:8px;}
.case-result b{font-family:"Barlow Condensed","Inter",sans-serif;font-size:32px;color:var(--c-orange);letter-spacing:.01em;}
.case-result span{font-size:13px;color:var(--c-weak);}
.case-mini{display:grid;gap:var(--gap);}

.tag{
  display:inline-flex;align-items:center;
  font-size:12.5px;font-weight:500;line-height:1;
  padding:5px 9px;border-radius:var(--r-tag);
  background:var(--c-steel-l);color:var(--c-steel);
}
.tag-orange{background:var(--c-orange-l);color:var(--c-orange);}
.tag-ink{background:var(--c-sub);color:var(--c-muted);}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);}
.news-card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:box-shadow .22s ease,border-color .22s ease;
}
.news-card:hover{box-shadow:var(--sh-2);border-color:var(--c-line-2);}
.news-card-media{display:block;overflow:hidden;background:var(--c-ink);}
.news-card-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .3s ease;}
.news-card:hover .news-card-media img{transform:scale(1.03);}
.news-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-body h3{font-size:17.5px;line-height:1.5;font-weight:500;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card:hover .news-body h3{color:var(--c-orange);}
.news-body p{font-size:14px;color:var(--c-muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  margin-top:auto;padding-top:12px;border-top:1px solid var(--c-line);
  font-size:13px;color:var(--c-weak);
}
.news-meta time{font-family:"Barlow Condensed","Inter",sans-serif;letter-spacing:.04em;}
.news-meta .go{color:var(--c-orange);font-weight:500;}
.empty-state{
  background:var(--c-sub);border:1px dashed var(--c-line-2);border-radius:var(--r-card);
  min-height:180px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:10px;color:var(--c-muted);font-size:15px;text-align:center;padding:26px;
}
.empty-state a{color:var(--c-orange);font-weight:500;font-size:14px;}

/* ---------- faq ---------- */
.faq-wrap{max-width:820px;margin:0 auto;}
.faq-item{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:6px;
  margin-bottom:12px;overflow:hidden;transition:border-color .2s ease;
}
.faq-item[open]{border-left:3px solid var(--c-orange);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:0 52px 0 20px;min-height:56px;
  display:flex;align-items:center;font-size:16px;color:var(--c-text);font-weight:400;
  position:relative;line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";position:absolute;right:22px;top:50%;width:11px;height:11px;
  border-right:2px solid var(--c-muted);border-bottom:2px solid var(--c-muted);
  transform:translateY(-70%) rotate(45deg);transition:transform .2s ease;
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg);border-color:var(--c-orange);}
.faq-item[open] summary{font-weight:500;}
.faq-answer{padding:0 20px 18px;font-size:15.5px;line-height:1.85;color:var(--c-muted);}

/* ---------- cta ---------- */
.cta-section{background:var(--c-ink);color:var(--c-reverse);position:relative;overflow:hidden;}
.cta-section::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(45deg,rgba(255,255,255,.035) 0 10px,transparent 10px 20px);
  pointer-events:none;
}
.cta-grid{position:relative;display:grid;grid-template-columns:.95fr 1.15fr;gap:56px;align-items:start;}
.cta-copy h2{color:#fff;}
.cta-copy p{color:#C9CFD5;font-size:16px;max-width:32em;}
.cta-list{margin-top:26px;display:grid;gap:14px;}
.cta-list li{display:flex;gap:12px;font-size:14.5px;color:#C9CFD5;line-height:1.7;}
.cta-list li b{color:#fff;font-weight:500;display:block;font-size:15px;}
.cta-list i{
  width:8px;height:8px;background:var(--c-orange);border-radius:1px;margin-top:8px;flex:none;
}
.contact-mini{
  margin-top:30px;padding-top:24px;border-top:1px solid rgba(255,255,255,.14);
  display:grid;gap:10px;font-size:14px;color:#C9CFD5;
}
.contact-mini strong{display:block;font-family:"Barlow Condensed",sans-serif;font-size:22px;color:#fff;letter-spacing:.03em;}
.form-card{
  background:#fff;border-radius:var(--r-card);padding:28px;box-shadow:0 16px 40px rgba(0,0,0,.22);
}
.form-card h3{font-size:19px;margin-bottom:6px;}
.form-card .fc-sub{font-size:13.5px;color:var(--c-muted);margin-bottom:20px;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{display:flex;flex-direction:column;gap:7px;}
.field.full{grid-column:1/-1;}
.field label{font-size:13px;color:var(--c-muted);font-weight:500;}
.field label .req{color:var(--c-err);margin-left:3px;}
.field input,.field select,.field textarea{
  height:44px;padding:0 12px;border:1px solid #D8D3CA;border-radius:var(--r-btn);
  background:#fff;font-size:15px;color:var(--c-text);
  transition:border-color .18s ease,box-shadow .18s ease;width:100%;
}
.field textarea{height:96px;padding:10px 12px;resize:vertical;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-orange);box-shadow:0 0 0 3px rgba(184,74,24,.14);
}
.form-note{font-size:12.5px;color:var(--c-weak);margin-top:14px;line-height:1.7;}
.form-msg{
  display:none;margin-top:14px;padding:11px 14px;border-radius:var(--r-btn);
  background:#E8F3ED;color:var(--c-ok);font-size:13.5px;border:1px solid #C7E2D3;
}
.form-msg.show{display:block;}

/* ---------- footer ---------- */
.site-footer{background:var(--c-ink);color:#C9CFD5;padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;}
.footer-brand .logo-text{color:#fff;font-size:19px;}
.footer-brand .logo-text em{color:#E08B58;}
.footer-brand .logo-mark{box-shadow:inset 0 0 0 1px rgba(255,255,255,.16);}
.footer-brand p{font-size:14px;line-height:1.85;color:#A9B1B9;margin-top:16px;max-width:26em;}
.footer-col h4{font-size:15px;color:#fff;font-weight:700;margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14px;color:#C9CFD5;}
.footer-col a:hover{color:var(--c-orange);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px;}
.footer-contact li{font-size:14px;line-height:1.8;color:#C9CFD5;}
.footer-contact strong{color:#fff;font-family:"Barlow Condensed",sans-serif;font-size:20px;letter-spacing:.03em;display:block;}
.qr{
  width:84px;height:84px;border-radius:6px;margin-top:14px;
  border:1px solid rgba(255,255,255,.22);
  background:repeating-linear-gradient(45deg,rgba(255,255,255,.10) 0 6px,transparent 6px 12px);
  display:flex;align-items:center;justify-content:center;
  font-size:11.5px;color:#8A9099;text-align:center;line-height:1.3;
}
.footer-bottom{
  margin-top:52px;padding:18px 0 26px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:#8A9099;
}
.footer-bottom a{color:#8A9099;}
.footer-bottom a:hover{color:var(--c-orange);}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .mega{right:-20px;width:800px;}
}
@media (max-width:1024px){
  h1{font-size:34px;}
  h2{font-size:26px;}
  .section{padding:72px 0;}
  .main-nav > ul > li > a{padding:0 10px;font-size:14.5px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-visual img{aspect-ratio:16/9;}
  .trust-inner{grid-template-columns:repeat(2,1fr);}
  .trust-item:nth-child(3){border-left:0;padding-left:0;}
  .trust-item:nth-child(n+3){border-top:1px solid rgba(255,255,255,.12);}
  .steps{grid-template-columns:1fr;gap:34px;}
  .steps::before{display:none;}
  .step{padding-right:0;padding-left:56px;}
  .step-dot{position:absolute;left:0;top:0;}
  .step h3{margin-top:4px;}
  .case-grid{grid-template-columns:1fr;}
  .case-card.big{grid-row:auto;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .cta-grid{grid-template-columns:1fr;gap:36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:860px){
  .main-nav{display:none;}
  .header-cta .btn{display:none;}
  .nav-toggle{display:flex;}
  .mega{display:none;}
  .drawer{display:flex;}
}
@media (max-width:768px){
  h1{font-size:30px;}
  h2{font-size:24px;}
  h3{font-size:19px;}
  body{font-size:16px;}
  .section{padding:56px 0;}
  .container,.header-inner,.trust-inner{padding-left:18px;padding-right:18px;}
  .news-grid{grid-template-columns:1fr;}
  .form-grid{grid-template-columns:1fr;}
  .hero-actions .btn{width:100%;}
  .hero-stat{left:14px;right:14px;bottom:14px;gap:16px;justify-content:space-between;}
  .hero-stat b{font-size:22px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{justify-content:center;text-align:center;}
}
@media (max-width:560px){
  h1{font-size:27px;line-height:1.3;}
  .hero{padding-top:34px;}
  .hero-sub{font-size:16px;}
  .trust-inner{grid-template-columns:1fr 1fr;}
  .trust-item{padding:14px 12px;font-size:13.5px;}
  .trust-item span.i{font-size:12px;}
  .step{padding-left:52px;}
  .faq-item summary{padding:0 46px 0 16px;font-size:15px;min-height:52px;}
  .case-result b{font-size:28px;}
  .form-card{padding:20px;}
  .cta-list li{font-size:14px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}

/* roulang page: article */
:root{
  --c-ink:#20242A;
  --c-ink-deep:#14171B;
  --c-orange:#B84A18;
  --c-orange-hover:#9C3D13;
  --c-orange-soft:#FBEFE8;
  --c-steel:#2F5D62;
  --c-steel-soft:#E7EEEE;
  --c-bg:#F6F4F0;
  --c-card:#FFFFFF;
  --c-sub:#EDEAE4;
  --c-text:#1C2025;
  --c-body:#333A41;
  --c-muted:#5E6670;
  --c-faint:#8A9099;
  --c-line:#E1DDD5;
  --c-line-strong:#D6D0C6;
  --c-reverse:#EDEFF1;
  --c-ok:#2E7D5B;
  --c-err:#B42318;
  --r-card:8px;
  --r-btn:6px;
  --r-tag:4px;
  --sh-1:0 1px 2px rgba(32,36,42,.05);
  --sh-2:0 10px 24px rgba(32,36,42,.10);
  --w:1200px;
  --f-num:"Barlow Condensed","Inter","PingFang SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-body);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  font-weight:400;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .18s ease;}
button{font-family:inherit;cursor:pointer;}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--c-text);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--c-text);font-weight:700;line-height:1.35;}
p{margin:0;}
:focus-visible{outline:2px solid var(--c-orange);outline-offset:2px;}
.container{width:100%;max-width:var(--w);margin:0 auto;padding:0 24px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:#fff;
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .2s ease;
}
.site-header.is-stuck{box-shadow:0 2px 10px rgba(0,0,0,.06);}
.nav-inner{display:flex;align-items:center;gap:28px;min-height:70px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:26px;height:26px;display:block;
  background:var(--c-ink);
  border-radius:3px 11px 3px 3px;
  position:relative;
}
.logo-mark::after{
  content:"";position:absolute;left:5px;top:11px;
  width:16px;height:4px;background:var(--c-orange);
  border-radius:1px;
}
.logo-text{font-size:20px;font-weight:700;letter-spacing:.5px;color:var(--c-ink);line-height:1;}
.logo-text em{font-style:normal;color:var(--c-orange);margin-left:2px;}
.main-nav{flex:1 1 auto;}
.main-nav > ul{display:flex;align-items:center;gap:2px;flex-wrap:nowrap;}
.main-nav > ul > li{position:relative;}
.main-nav > ul > li > a{
  position:relative;display:flex;align-items:center;height:70px;padding:0 13px;
  font-size:15.5px;font-weight:500;color:var(--c-text);white-space:nowrap;
}
.main-nav > ul > li > a::after{
  content:"";position:absolute;left:13px;right:13px;bottom:0;height:3px;
  background:transparent;border-radius:2px 2px 0 0;transition:background .2s ease;
}
.main-nav > ul > li > a:hover{color:var(--c-orange);}
.main-nav > ul > li > a:hover::after{background:var(--c-orange-soft);}
.main-nav > ul > li > a.is-active{color:var(--c-ink);}
.main-nav > ul > li > a.is-active::after{background:var(--c-orange);}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}

/* Mega 面板 */
.mega{
  position:absolute;top:100%;right:0;width:820px;
  background:#fff;border:1px solid var(--c-line);border-top:2px solid var(--c-orange);
  border-radius:0 0 var(--r-card) var(--r-card);
  box-shadow:0 18px 40px rgba(20,23,27,.14);
  padding:24px 26px 0;
  opacity:0;visibility:hidden;transform:translateY(4px);
  transition:opacity .16s ease,transform .16s ease,visibility .16s ease;
  z-index:90;
}
.has-mega:hover .mega,.has-mega:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0);}
.mega-grid{display:grid;grid-template-columns:1.15fr 1fr .95fr;gap:26px;padding-bottom:20px;}
.mega-col-title{font-size:12.5px;font-weight:700;letter-spacing:1px;color:var(--c-faint);margin-bottom:12px;}
.mega-links{display:grid;grid-template-columns:1fr 1fr;gap:4px 14px;}
.mega-links a{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--c-body);padding:6px 0;}
.mega-links a i{width:10px;height:10px;background:var(--c-orange);border-radius:2px;flex:0 0 auto;opacity:.85;}
.mega-links a:hover{color:var(--c-orange);}
.mega-posts li + li{border-top:1px solid var(--c-line);}
.mega-posts a{display:block;padding:9px 0;}
.mega-posts .mt{display:block;font-size:14px;color:var(--c-body);line-height:1.6;}
.mega-posts .md{display:block;font-size:12.5px;color:var(--c-faint);margin-top:2px;}
.mega-posts a:hover .mt{color:var(--c-orange);}
.mega-card{display:block;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;background:var(--c-card);}
.mega-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.mega-card .mc-body{padding:10px 12px 12px;}
.mega-card .mc-title{font-size:14px;font-weight:500;color:var(--c-text);line-height:1.55;}
.mega-card .mc-more{font-size:12.5px;color:var(--c-orange);margin-top:6px;display:block;}
.mega-card:hover{box-shadow:var(--sh-2);border-color:var(--c-line-strong);}
.mega-foot{
  margin:0 -26px;padding:12px 26px;background:var(--c-sub);
  display:flex;flex-wrap:wrap;gap:8px 24px;align-items:center;
  font-size:13px;color:var(--c-muted);border-radius:0 0 var(--r-card) var(--r-card);
}
.mega-foot strong{color:var(--c-ink);font-family:var(--f-num);letter-spacing:.5px;font-size:15px;}
.mega-foot a{color:var(--c-orange);font-weight:500;}
.mega-foot a:hover{color:var(--c-orange-hover);text-decoration:underline;text-underline-offset:3px;}
.nav-cta-mobile{display:none;}

/* 汉堡 */
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;border:1px solid var(--c-line);border-radius:var(--r-btn);
  background:#fff;padding:0 11px;margin-left:auto;
}
.nav-toggle span{display:block;height:2px;background:var(--c-ink);border-radius:2px;transition:transform .2s ease,opacity .2s ease;}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg);}
body.nav-open .nav-toggle span:nth-child(2){opacity:0;}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:500;line-height:1;border:1px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn:active{transform:translateY(1px);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-dark{background:var(--c-ink);color:#fff;}
.btn-dark:hover{background:var(--c-ink-deep);box-shadow:0 8px 18px rgba(20,23,27,.18);}
.btn-primary{background:var(--c-orange);color:#fff;}
.btn-primary:hover{background:var(--c-orange-hover);box-shadow:0 8px 18px rgba(184,74,24,.24);}
.btn-ghost{background:#fff;border-color:var(--c-line);color:var(--c-text);}
.btn-ghost:hover{border-color:var(--c-orange);color:var(--c-orange);}
.btn-on-dark{background:transparent;border-color:rgba(255,255,255,.28);color:var(--c-reverse);}
.btn-on-dark:hover{border-color:var(--c-orange);color:#fff;background:rgba(184,74,24,.16);}

/* ---------- 文章头 ---------- */
.article-hero{
  position:relative;
  background:var(--c-ink) url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color:#fff;
  overflow:hidden;
}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(96deg,rgba(20,23,27,.94) 0%,rgba(20,23,27,.82) 52%,rgba(20,23,27,.58) 100%);
}
.article-hero .container{position:relative;z-index:2;padding:30px 24px 46px;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(237,239,241,.72);margin-bottom:22px;}
.breadcrumb a{color:rgba(237,239,241,.72);}
.breadcrumb a:hover{color:var(--c-orange);}
.breadcrumb .sep{color:rgba(237,239,241,.36);}
.breadcrumb .cur{color:#fff;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--r-tag);
  background:rgba(47,93,98,.9);color:#EAF1F1;
  font-size:12.5px;font-weight:500;letter-spacing:.4px;
}
.article-hero .tag{background:var(--c-orange);color:#fff;}
.article-hero h1{
  color:#fff;font-size:40px;line-height:1.3;font-weight:700;
  margin:18px 0 0;max-width:900px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  margin-top:20px;font-size:13.5px;color:rgba(237,239,241,.78);
}
.article-meta .num{font-family:var(--f-num);letter-spacing:.6px;font-variant-numeric:tabular-nums;}
.article-meta .bar{width:1px;height:13px;background:rgba(255,255,255,.24);display:inline-block;}

/* ---------- 主体布局 ---------- */
.article-main{padding:56px 0 72px;}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start;}
.article-paper{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:40px 44px 44px;
}
.article-content{max-width:100%;color:var(--c-body);}
.article-content > *:first-child{margin-top:0;}
.article-content p{margin:0 0 1.05em;line-height:1.85;}
.article-content h2{
  position:relative;font-size:24px;line-height:1.45;font-weight:700;
  margin:1.9em 0 .75em;padding-left:14px;color:var(--c-text);
}
.article-content h2::before{
  content:"";position:absolute;left:0;top:.22em;width:3px;height:1em;
  background:var(--c-orange);border-radius:2px;
}
.article-content h3{font-size:18.5px;font-weight:700;margin:1.6em 0 .6em;color:var(--c-text);}
.article-content h4{font-size:16.5px;font-weight:700;margin:1.4em 0 .5em;color:var(--c-text);}
.article-content ul,.article-content ol{margin:0 0 1.1em;padding-left:2px;}
.article-content ul li{position:relative;padding-left:18px;margin:0 0 .5em;line-height:1.8;}
.article-content ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;
  background:var(--c-orange);border-radius:1px;
}
.article-content ol{list-style:decimal;padding-left:22px;}
.article-content ol li{margin:0 0 .5em;line-height:1.8;}
.article-content a{color:var(--c-orange);text-decoration:underline;text-underline-offset:3px;}
.article-content a:hover{color:var(--c-orange-hover);}
.article-content img{border-radius:var(--r-card);margin:1.4em 0;width:100%;height:auto;background:var(--c-ink);}
.article-content blockquote{
  margin:1.5em 0;padding:16px 20px;background:var(--c-sub);
  border-left:3px solid var(--c-orange);border-radius:0 var(--r-card) var(--r-card) 0;
  color:var(--c-body);font-style:normal;
}
.article-content blockquote p:last-child{margin-bottom:0;}
.article-content table{
  width:100%;border-collapse:collapse;margin:1.4em 0;font-size:15px;
  border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
}
.article-content thead th{background:var(--c-steel-soft);color:var(--c-steel);font-weight:700;text-align:left;}
.article-content th,.article-content td{padding:11px 14px;border-bottom:1px solid var(--c-line);vertical-align:top;}
.article-content tbody tr:nth-child(even) td{background:#FBFAF7;}
.article-content tbody tr:last-child td{border-bottom:0;}
.article-content code{
  background:var(--c-sub);padding:1px 6px;border-radius:var(--r-tag);
  font-family:var(--f-num);font-size:14.5px;color:var(--c-ink);
}
.article-content strong{color:var(--c-text);font-weight:700;}

.empty-state{
  border:1px dashed var(--c-line-strong);background:#FBFAF7;border-radius:var(--r-card);
  padding:52px 24px;text-align:center;min-height:200px;
  display:flex;flex-direction:column;justify-content:center;gap:12px;
}
.empty-state p{font-size:17px;color:var(--c-muted);}
.empty-state a{color:var(--c-orange);font-weight:500;text-decoration:underline;text-underline-offset:4px;}

.article-foot{
  margin-top:36px;padding-top:26px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:12px;
}

/* ---------- 侧栏 ---------- */
.article-side{display:flex;flex-direction:column;gap:20px;position:sticky;top:92px;}
.side-card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:20px 20px 22px;box-shadow:var(--sh-1);
}
.side-title{
  font-size:15px;font-weight:700;color:var(--c-text);
  display:flex;align-items:center;gap:8px;margin-bottom:14px;
}
.side-title::before{content:"";width:12px;height:3px;background:var(--c-orange);border-radius:2px;}
.side-toc a{
  display:flex;align-items:flex-start;gap:8px;font-size:14px;color:var(--c-muted);
  padding:7px 0;border-bottom:1px dashed var(--c-line);line-height:1.6;
}
.side-toc li:last-child a{border-bottom:0;}
.side-toc a:hover{color:var(--c-orange);}
.side-toc a i{width:6px;height:6px;background:var(--c-steel);border-radius:1px;flex:0 0 auto;margin-top:9px;}
.side-list li + li{margin-top:12px;padding-top:12px;border-top:1px solid var(--c-line);}
.side-list a{display:block;}
.side-list .st{font-size:14px;color:var(--c-body);line-height:1.65;}
.side-list a:hover .st{color:var(--c-orange);}
.side-list .sd{font-size:12.5px;color:var(--c-faint);margin-top:4px;font-family:var(--f-num);letter-spacing:.4px;}
.side-cta{background:var(--c-ink);border-color:var(--c-ink);color:var(--c-reverse);}
.side-cta .side-title{color:#fff;}
.side-cta p{font-size:13.5px;line-height:1.75;color:rgba(237,239,241,.78);margin-bottom:14px;}
.side-cta .phone{
  display:block;font-family:var(--f-num);font-size:24px;letter-spacing:1px;
  color:#fff;margin-bottom:14px;font-weight:700;
}
.side-cta .btn{width:100%;}

/* ---------- 相关推荐 ---------- */
.related{padding:0 0 84px;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:30px;flex-wrap:wrap;}
.sec-head .kicker{font-family:var(--f-num);font-size:13px;letter-spacing:2px;color:var(--c-orange);display:block;margin-bottom:8px;}
.sec-head h2{font-size:30px;position:relative;padding-left:16px;}
.sec-head h2::before{content:"";position:absolute;left:0;top:.2em;width:3px;height:.95em;background:var(--c-orange);border-radius:2px;}
.sec-head .link{font-size:14.5px;color:var(--c-orange);font-weight:500;}
.sec-head .link:hover{color:var(--c-orange-hover);text-decoration:underline;text-underline-offset:4px;}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.post-card{
  display:flex;flex-direction:column;background:var(--c-card);
  border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);transition:box-shadow .25s ease,border-color .25s ease,transform .25s ease;
}
.post-card .thumb{position:relative;overflow:hidden;background:var(--c-ink);}
.post-card .thumb img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .3s ease;}
.post-card:hover{box-shadow:var(--sh-2);border-color:var(--c-line-strong);transform:translateY(-2px);}
.post-card:hover .thumb img{transform:scale(1.03);}
.post-card .pc-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1 1 auto;}
.post-card .pc-title{font-size:17px;font-weight:500;line-height:1.55;color:var(--c-text);margin:10px 0 8px;}
.post-card:hover .pc-title{color:var(--c-orange);}
.post-card .pc-desc{font-size:14px;color:var(--c-muted);line-height:1.75;margin-bottom:16px;}
.post-card .pc-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-faint);font-family:var(--f-num);letter-spacing:.5px;
  padding-top:12px;border-top:1px solid var(--c-line);
}
.post-card .pc-foot .arrow{color:var(--c-orange);font-size:16px;}

/* ---------- 深色 CTA ---------- */
.cta-block{background:var(--c-ink);color:var(--c-reverse);position:relative;overflow:hidden;}
.cta-block::after{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(45deg,rgba(255,255,255,.05) 0 1px,transparent 1px 12px);
  pointer-events:none;
}
.cta-inner{
  position:relative;z-index:2;padding:64px 24px;
  display:grid;grid-template-columns:1.3fr .7fr;gap:40px;align-items:center;
}
.cta-inner h2{color:#fff;font-size:30px;line-height:1.4;}
.cta-inner p{margin-top:14px;font-size:15.5px;color:rgba(237,239,241,.78);max-width:640px;}
.cta-actions{display:flex;flex-direction:column;gap:12px;align-items:stretch;}
.cta-actions .note{font-size:13px;color:rgba(237,239,241,.6);text-align:center;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-ink);color:var(--c-reverse);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:44px;}
.footer-brand .logo{margin-bottom:18px;}
.footer-brand .logo-text{color:#fff;}
.footer-brand .logo-mark{background:#fff;}
.footer-brand .logo-mark::after{background:var(--c-orange);}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(237,239,241,.72);max-width:360px;}
.qr{
  margin-top:20px;width:96px;height:96px;border:1px dashed rgba(255,255,255,.28);
  border-radius:var(--r-tag);display:flex;align-items:center;justify-content:center;
  font-size:12px;color:rgba(237,239,241,.5);text-align:center;line-height:1.5;
}
.footer-col h4{font-size:15px;color:#fff;font-weight:700;margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{font-size:14px;color:#C9CFD5;}
.footer-col ul a:hover{color:var(--c-orange);text-decoration:underline;text-underline-offset:3px;}
.footer-contact li{font-size:14px;color:#C9CFD5;line-height:1.8;}
.footer-contact strong{font-family:var(--f-num);font-size:20px;color:#fff;letter-spacing:1px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:12.5px;color:rgba(237,239,241,.56);
}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .main-nav > ul > li > a{padding:0 10px;font-size:15px;}
  .mega{width:720px;}
}
@media (max-width:1024px){
  .nav-inner{gap:14px;}
  .nav-toggle{display:flex;}
  .nav-actions{display:none;}
  .main-nav{
    position:fixed;top:0;right:0;z-index:95;
    width:86%;max-width:380px;height:100dvh;
    background:#fff;border-left:1px solid var(--c-line);
    padding:82px 22px 120px;overflow-y:auto;
    transform:translateX(102%);transition:transform .28s ease;
    box-shadow:-12px 0 32px rgba(20,23,27,.18);
  }
  body.nav-open .main-nav{transform:translateX(0);}
  .main-nav > ul{flex-direction:column;align-items:stretch;gap:0;}
  .main-nav > ul > li{border-bottom:1px solid var(--c-line);}
  .main-nav > ul > li > a{height:auto;padding:15px 2px;font-size:16px;}
  .main-nav > ul > li > a::after{display:none;}
  .main-nav > ul > li > a.is-active{color:var(--c-orange);}
  .mega{display:none;}
  .nav-cta-mobile{display:block;border-bottom:0;padding-top:20px;}
  .nav-cta-mobile .btn{width:100%;height:46px;}
  body.nav-open{overflow:hidden;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:32px;}
  .article-side{position:static;}
  .article-paper{padding:32px 28px 34px;}
  .article-hero h1{font-size:32px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-inner{grid-template-columns:1fr;gap:26px;padding:52px 24px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:760px){
  body{font-size:16px;}
  .container{padding:0 18px;}
  .article-hero .container{padding:22px 18px 34px;}
  .article-hero h1{font-size:27px;line-height:1.36;}
  .article-main{padding:36px 0 52px;}
  .article-paper{padding:24px 18px 26px;}
  .article-content h2{font-size:21px;}
  .article-content h3{font-size:17.5px;}
  .sec-head h2{font-size:24px;}
  .card-grid{grid-template-columns:minmax(0,1fr);}
  .related{padding-bottom:56px;}
  .cta-inner h2{font-size:24px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding-bottom:32px;}
  .footer-bottom{font-size:12px;}
  .article-content table{display:block;overflow-x:auto;white-space:nowrap;}
}
@media (max-width:560px){
  .logo-text{font-size:18px;}
  .article-hero h1{font-size:24px;}
  .article-meta{font-size:12.5px;gap:10px;}
  .btn{width:100%;}
  .btn-sm{width:auto;}
  .article-foot .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-brand p{max-width:none;}
  .cta-actions{width:100%;}
  .article-content table{font-size:14px;}
}

/* roulang page: category1 */
:root{
  --c-ink:#20242A;
  --c-ink-deep:#14171B;
  --c-rust:#B84A18;
  --c-rust-dark:#9C3D13;
  --c-rust-soft:#FBEFE8;
  --c-steel:#2F5D62;
  --c-bg:#F6F4F0;
  --c-card:#FFFFFF;
  --c-soft:#EDEAE4;
  --c-text:#1C2025;
  --c-body:#333A41;
  --c-muted:#5E6670;
  --c-faint:#8A9099;
  --c-invert:#EDEFF1;
  --c-line:#E1DDD5;
  --c-line-strong:#D6D0C6;
  --c-line-dark:rgba(255,255,255,.12);
  --c-ok:#2E7D5B;
  --c-err:#B42318;
  --c-warn:#B7791F;
  --r-card:8px;
  --r-btn:6px;
  --r-tag:4px;
  --sh-1:0 1px 2px rgba(32,36,42,.05);
  --sh-2:0 10px 24px rgba(32,36,42,.10);
  --maxw:1200px;
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-num:"Barlow Condensed","Inter","PingFang SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.85;
  color:var(--c-body);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--c-rust);}
h1,h2,h3,h4{margin:0;color:var(--c-text);font-weight:700;letter-spacing:.01em;}
h1{font-size:42px;line-height:1.25;}
h2{font-size:30px;line-height:1.35;}
h3{font-size:21px;line-height:1.45;font-weight:500;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--c-rust);outline-offset:2px;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.02em;}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:#fff;
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .2s ease;
}
.site-header.is-stuck{box-shadow:0 2px 10px rgba(0,0,0,.06);}
.header-inner{
  display:flex;align-items:center;gap:24px;
  height:72px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:26px;height:26px;border-radius:3px;
  background:var(--c-ink);
  position:relative;
  flex:0 0 auto;
}
.logo-mark::before{
  content:"";position:absolute;inset:6px;
  border:2px solid var(--c-rust);
  border-radius:50%;
}
.logo-text{
  font-size:19px;font-weight:700;color:var(--c-text);
  letter-spacing:.02em;line-height:1;
}
.logo-text em{font-style:normal;color:var(--c-rust);}
.main-nav{position:relative;margin-left:auto;height:100%;display:flex;align-items:center;}
.main-nav>ul{display:flex;align-items:center;gap:4px;}
.main-nav>ul>li{position:relative;height:72px;display:flex;align-items:center;}
.main-nav>ul>li>a{
  display:inline-flex;align-items:center;height:72px;
  padding:0 14px;font-size:15px;font-weight:500;color:var(--c-body);
  border-bottom:3px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.main-nav>ul>li>a:hover{color:var(--c-rust);}
.main-nav>ul>li.is-active>a{color:var(--c-text);border-bottom-color:var(--c-rust);}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:12px;}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--c-line);
  border-radius:var(--r-btn);background:#fff;cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-text);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-text);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* mega menu */
.has-mega>.mega{
  position:absolute;top:100%;right:0;
  width:min(880px,calc(100vw - 48px));
  background:#fff;border:1px solid var(--c-line);
  border-top:2px solid var(--c-rust);
  box-shadow:var(--sh-2);
  padding:26px 26px 0;
  opacity:0;visibility:hidden;transform:translateY(4px);
  transition:opacity .16s ease,transform .16s ease,visibility .16s ease;
  z-index:95;
}
.has-mega:hover>.mega,
.has-mega:focus-within>.mega{opacity:1;visibility:visible;transform:translateY(0);}
.mega-grid{display:grid;grid-template-columns:1.15fr 1fr .95fr;gap:26px;}
.mega-col-title{
  font-size:13px;font-weight:700;color:var(--c-text);
  letter-spacing:.06em;margin-bottom:12px;
}
.mega-links{display:grid;grid-template-columns:1fr 1fr;gap:4px 14px;}
.mega-links a{
  display:flex;align-items:center;gap:8px;
  font-size:14px;color:var(--c-muted);padding:5px 0;
}
.mega-links a i{
  width:6px;height:6px;background:var(--c-rust);border-radius:1px;flex:0 0 auto;
}
.mega-links a:hover{color:var(--c-rust);}
.mega-posts li{border-bottom:1px dashed var(--c-line);}
.mega-posts li:last-child{border-bottom:0;}
.mega-posts a{display:block;padding:9px 0;}
.mega-posts .mt{display:block;font-size:14px;color:var(--c-body);line-height:1.55;}
.mega-posts a:hover .mt{color:var(--c-rust);}
.mega-posts .md{display:block;font-size:12.5px;color:var(--c-faint);margin-top:2px;}
.mega-card{display:block;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;background:#fff;}
.mega-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.mega-card-t{display:block;font-size:14px;font-weight:500;color:var(--c-text);padding:10px 12px 4px;line-height:1.5;}
.mega-card-a{display:block;font-size:12.5px;color:var(--c-rust);padding:0 12px 12px;}
.mega-card:hover{border-color:var(--c-line-strong);box-shadow:var(--sh-1);}
.mega-foot{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  margin:22px -26px 0;padding:12px 26px;
  background:var(--c-bg);border-top:1px solid var(--c-line);
  font-size:13.5px;color:var(--c-muted);
}
.mega-foot a{color:var(--c-rust);font-weight:500;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:500;line-height:1.2;
  border:1px solid transparent;cursor:pointer;
  transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.btn:active{transform:translateY(1px);}
.btn-ink{background:var(--c-ink);color:#fff;}
.btn-ink:hover{background:var(--c-ink-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn-ghost{background:#fff;color:var(--c-text);border-color:var(--c-line);}
.btn-ghost:hover{border-color:var(--c-ink);color:var(--c-ink);transform:translateY(-1px);}
.btn-rust{background:var(--c-rust);color:#fff;}
.btn-rust:hover{background:var(--c-rust-dark);color:#fff;transform:translateY(-1px);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled]{background:#E8E5DF;color:var(--c-faint);cursor:not-allowed;border-color:#E8E5DF;}
.arrow{font-family:var(--font-num);font-weight:700;}

/* ---------- shared section bits ---------- */
.section{padding:88px 0;}
.section-soft{background:var(--c-soft);}
.section-dark{background:var(--c-ink);color:var(--c-invert);}
.section-dark h2,.section-dark h3{color:#fff;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-num);
  font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--c-rust);font-weight:700;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--c-rust);}
.section-dark .eyebrow{color:#E88A55;}
.section-dark .eyebrow::before{background:#E88A55;}
.sec-head{max-width:760px;margin-bottom:36px;}
.sec-head p{color:var(--c-muted);font-size:17px;line-height:1.75;margin-top:14px;max-width:42ch;}
.section-dark .sec-head p{color:#B9C0C7;}
.tag{
  display:inline-flex;align-items:center;
  padding:3px 9px;border-radius:var(--r-tag);
  font-size:12.5px;font-weight:500;letter-spacing:.02em;
  background:rgba(47,93,98,.10);color:var(--c-steel);
}
.tag-rust{background:var(--c-rust-soft);color:var(--c-rust);}

/* ---------- hero ---------- */
.hero-narrow{
  position:relative;
  background:
    repeating-linear-gradient(45deg,rgba(255,255,255,.045) 0 2px,transparent 2px 12px),
    radial-gradient(120% 140% at 12% 0%,#2A3037 0%,#20242A 45%,#14171B 100%);
  color:var(--c-invert);
  padding:72px 0 64px;
  overflow:hidden;
}
.hero-inner{display:grid;grid-template-columns:1.12fr .88fr;gap:48px;align-items:center;}
.hero-narrow h1{color:#fff;font-size:40px;line-height:1.25;margin-bottom:18px;}
.hero-narrow .lead{
  font-size:18px;line-height:1.7;color:#C4CBD2;max-width:44ch;margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px;}
.hero-actions .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.32);}
.hero-actions .btn-ghost:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.06);}
.hero-note{font-size:13px;color:#9AA3AC;line-height:1.7;}
.hero-note b{color:#E88A55;font-weight:500;}
.hero-figure{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--c-line-dark);
  background:#1A1E23;
  box-shadow:0 18px 40px rgba(0,0,0,.35);
}
.hero-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.hero-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:10px 14px;font-size:12.5px;color:#D8DDE2;
  background:linear-gradient(180deg,rgba(20,23,27,0) 0%,rgba(20,23,27,.82) 100%);
}
.crumb{
  font-size:13.5px;color:#909AA3;margin-bottom:20px;display:flex;flex-wrap:wrap;gap:8px;align-items:center;
}
.crumb a{color:#C4CBD2;}
.crumb a:hover{color:#fff;}
.crumb span{color:#6E7882;}

/* ---------- spec table ---------- */
.table-wrap{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}
table.spec{width:100%;border-collapse:collapse;min-width:820px;font-size:15px;}
table.spec thead th{
  background:rgba(47,93,98,.10);
  color:var(--c-steel);
  font-weight:700;font-size:14px;letter-spacing:.03em;
  text-align:left;padding:15px 18px;white-space:nowrap;
  border-bottom:1px solid rgba(47,93,98,.22);
}
table.spec tbody td{
  padding:15px 18px;border-bottom:1px solid var(--c-line);
  color:var(--c-body);vertical-align:top;
}
table.spec tbody tr:nth-child(even){background:#FAF9F6;}
table.spec tbody tr:hover{background:var(--c-rust-soft);}
table.spec tbody tr:last-child td{border-bottom:0;}
table.spec .grade{font-weight:700;color:var(--c-text);font-family:var(--font-num);font-size:16px;}
.table-hint{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:12px 18px;background:#fff;border-top:1px solid var(--c-line);
  font-size:12.5px;color:var(--c-faint);
}

/* ---------- split: products + quote ---------- */
.split{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:32px;align-items:start;}
.prod-list{display:grid;gap:24px;}
.prod-item{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
  display:grid;grid-template-columns:300px minmax(0,1fr);
  transition:box-shadow .25s ease,border-color .25s ease,transform .25s ease;
}
.prod-item:hover{border-color:var(--c-line-strong);box-shadow:var(--sh-2);transform:translateY(-2px);}
.prod-media{position:relative;background:#1A1E23;overflow:hidden;}
.prod-media img{width:100%;height:100%;min-height:210px;aspect-ratio:4/3;object-fit:cover;transition:transform .3s ease;}
.prod-item:hover .prod-media img{transform:scale(1.03);}
.prod-media .badge{
  position:absolute;left:12px;top:12px;
  background:rgba(32,36,42,.86);color:#fff;
  font-size:12px;font-weight:500;padding:4px 9px;border-radius:var(--r-tag);
  letter-spacing:.02em;
}
.prod-body{padding:22px 24px;}
.prod-body h3{font-size:20px;font-weight:700;margin-bottom:8px;}
.prod-body .desc{font-size:14.5px;color:var(--c-muted);line-height:1.75;margin-bottom:14px;}
.spec-points{display:grid;gap:7px;}
.spec-points li{
  position:relative;padding-left:16px;font-size:14.5px;color:var(--c-body);line-height:1.7;
}
.spec-points li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;background:var(--c-rust);border-radius:1px;
}
.spec-points li b{font-family:var(--font-num);font-weight:700;color:var(--c-text);}

.quote-card{
  position:sticky;top:96px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sh-2);padding:24px;
}
.quote-card h3{font-size:19px;font-weight:700;margin-bottom:6px;}
.quote-card .qsub{font-size:13.5px;color:var(--c-muted);line-height:1.7;margin-bottom:18px;}
.field{margin-bottom:14px;}
.field label{display:block;font-size:13px;font-weight:500;color:var(--c-body);margin-bottom:6px;}
.field label .req{color:var(--c-err);margin-left:2px;}
.field input,.field select,.field textarea{
  width:100%;padding:11px 12px;height:44px;
  border:1px solid #D8D3CA;border-radius:var(--r-btn);
  background:#fff;color:var(--c-text);font-size:14.5px;font-family:inherit;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{height:auto;min-height:88px;resize:vertical;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-rust);box-shadow:0 0 0 2px rgba(184,74,24,.18);
}
.field input::placeholder,.field textarea::placeholder{color:#A8AEB4;}
.form-note{font-size:12.5px;color:var(--c-faint);line-height:1.7;margin-top:10px;}
.form-ok{
  display:none;margin-top:12px;padding:10px 12px;border-radius:var(--r-btn);
  background:#EAF5EF;border:1px solid #BFE0CE;color:var(--c-ok);
  font-size:13px;line-height:1.7;
}
.form-ok.show{display:block;}
.quote-foot{
  margin-top:18px;padding-top:16px;border-top:1px dashed var(--c-line);
  font-size:13px;color:var(--c-muted);line-height:1.85;
}
.quote-foot strong{display:block;font-family:var(--font-num);font-size:20px;color:var(--c-text);letter-spacing:.04em;}

/* ---------- check steps ---------- */
.steps{
  display:grid;grid-template-columns:1fr 1fr .86fr;gap:28px;
  position:relative;
}
.steps::before{
  content:"";position:absolute;left:0;right:0;top:19px;height:1px;background:var(--c-line-strong);
}
.step{position:relative;padding-top:0;}
.step .dot{
  width:36px;height:36px;border-radius:50%;background:var(--c-rust);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-weight:700;font-size:17px;
  position:relative;z-index:2;margin-bottom:16px;
}
.step h3{font-size:19px;font-weight:700;margin-bottom:8px;}
.step p{font-size:14.5px;color:var(--c-muted);line-height:1.78;margin:0 0 10px;}
.step .deliver{
  display:inline-block;font-size:12.5px;color:var(--c-steel);
  background:rgba(47,93,98,.10);padding:3px 9px;border-radius:var(--r-tag);
}

/* ---------- faq ---------- */
.faq-wrap{max-width:820px;margin:0 auto;display:grid;gap:12px;}
details.faq{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-btn);
  box-shadow:var(--sh-1);overflow:hidden;
  transition:border-color .18s ease,box-shadow .18s ease;
}
details.faq[open]{border-color:var(--c-line-strong);box-shadow:var(--sh-2);}
details.faq summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:0 20px;min-height:56px;
  font-size:16px;font-weight:400;color:var(--c-text);
  position:relative;
}
details.faq summary::-webkit-details-marker{display:none;}
details.faq summary::after{
  content:"+";font-family:var(--font-num);font-size:22px;line-height:1;
  color:var(--c-rust);flex:0 0 auto;transition:transform .2s ease;
}
details.faq[open] summary::after{content:"−";}
details.faq[open] summary{font-weight:500;}
details.faq[open] summary::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;background:var(--c-rust);
}
.faq-body{padding:0 20px 16px 20px;font-size:15.5px;line-height:1.85;color:var(--c-body);}
.faq-body p{margin:0;}

/* ---------- cta ---------- */
.cta-dark{
  position:relative;color:var(--c-invert);
  background:
    repeating-linear-gradient(45deg,rgba(255,255,255,.045) 0 2px,transparent 2px 12px),
    radial-gradient(120% 140% at 88% 0%,#2A3037 0%,#20242A 45%,#14171B 100%);
  padding:80px 0;
}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start;}
.cta-copy h2{color:#fff;margin-bottom:16px;}
.cta-copy p{color:#B9C0C7;font-size:16.5px;line-height:1.8;max-width:40ch;}
.cta-list{display:grid;gap:12px;margin-top:26px;}
.cta-list li{
  display:flex;gap:12px;align-items:flex-start;
  font-size:14.5px;color:#C4CBD2;line-height:1.7;
}
.cta-list li i{
  width:6px;height:6px;background:var(--c-rust);border-radius:1px;margin-top:9px;flex:0 0 auto;
}
.cta-list li b{color:#fff;font-weight:500;}
.cta-form{
  background:#fff;border-radius:var(--r-card);padding:28px;box-shadow:0 18px 40px rgba(0,0,0,.28);
}
.cta-form h3{font-size:19px;font-weight:700;margin-bottom:6px;color:var(--c-text);}
.cta-form .qsub{font-size:13.5px;color:var(--c-muted);margin-bottom:18px;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 16px;}
.form-grid .full{grid-column:1 / -1;}
.cta-contact{margin-top:18px;padding-top:16px;border-top:1px dashed var(--c-line);display:grid;gap:6px;font-size:13.5px;color:var(--c-muted);}
.cta-contact strong{color:var(--c-text);font-family:var(--font-num);font-size:18px;letter-spacing:.04em;}

/* ---------- media fallback ---------- */
.img-fallback{
  background:
    repeating-linear-gradient(45deg,rgba(255,255,255,.05) 0 2px,transparent 2px 12px),
    #1A1E23;
  color:#8A9099;display:flex;align-items:center;justify-content:center;
  font-size:13px;min-height:180px;text-align:center;padding:16px;
}

/* ---------- footer ---------- */
.site-footer{
  background:var(--c-ink);color:#C9CFD5;padding:64px 0 0;
  font-size:14px;
}
.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1.05fr;gap:40px;}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand .logo-text{color:#fff;}
.footer-brand .logo-text em{color:#E88A55;}
.footer-brand .logo-mark{background:#fff;}
.footer-brand .logo-mark::before{border-color:var(--c-rust);}
.footer-brand p{font-size:13.5px;line-height:1.85;color:#A9B1B9;max-width:34ch;}
.qr{
  width:88px;height:88px;margin-top:18px;
  border:1px solid rgba(255,255,255,.22);border-radius:6px;
  display:flex;align-items:center;justify-content:center;
  font-size:11.5px;color:#8A9099;text-align:center;line-height:1.4;
  background:rgba(255,255,255,.03);
}
.footer-col h4{
  font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.03em;
}
.footer-col ul{display:grid;gap:9px;}
.footer-col ul a{font-size:14px;color:#C9CFD5;}
.footer-col ul a:hover{color:#E88A55;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px;}
.footer-contact li{font-size:13.5px;color:#A9B1B9;line-height:1.75;}
.footer-contact li strong{color:#fff;font-family:var(--font-num);font-size:19px;letter-spacing:.05em;font-weight:700;}
.footer-bottom{
  margin-top:48px;padding:18px 0;
  border-top:1px solid var(--c-line-dark);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:12.5px;color:#8A9099;
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  body{font-size:16px;}
  h1{font-size:34px;}
  h2{font-size:26px;}
  .section{padding:72px 0;}
  .hero-inner{grid-template-columns:1fr;gap:32px;}
  .hero-narrow{padding:56px 0 52px;}
  .hero-narrow h1{font-size:32px;}
  .split{grid-template-columns:1fr;}
  .quote-card{position:static;}
  .steps{grid-template-columns:1fr;gap:26px;}
  .steps::before{display:none;}
  .step{padding-left:52px;}
  .step .dot{position:absolute;left:0;top:0;margin-bottom:0;}
  .cta-grid{grid-template-columns:1fr;gap:36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .main-nav>ul>li>a{padding:0 10px;font-size:14.5px;}
}

@media (max-width:900px){
  .nav-toggle{display:inline-flex;}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;
    width:86%;max-width:360px;
    background:#fff;border-left:1px solid var(--c-line);
    box-shadow:-12px 0 32px rgba(0,0,0,.16);
    transform:translateX(102%);
    transition:transform .24s ease;
    display:block;padding:78px 22px 28px;overflow-y:auto;z-index:99;
  }
  body.menu-open .main-nav{transform:translateX(0);}
  .main-nav>ul{display:block;}
  .main-nav>ul>li{display:block;height:auto;border-bottom:1px solid var(--c-line);}
  .main-nav>ul>li>a{
    height:auto;padding:15px 2px;font-size:16px;border-bottom:0;display:flex;
  }
  .main-nav>ul>li.is-active>a{color:var(--c-rust);}
  .has-mega>.mega{
    display:none;
  }
  .header-actions .btn{display:none;}
  .menu-shade{
    position:fixed;inset:0;background:rgba(20,23,27,.5);
    opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;z-index:98;
  }
  body.menu-open .menu-shade{opacity:1;visibility:visible;}
}

@media (max-width:768px){
  .container{padding:0 18px;}
  h1{font-size:28px;}
  h2{font-size:23px;}
  h3{font-size:18px;}
  .section{padding:56px 0;}
  .hero-narrow h1{font-size:27px;}
  .hero-narrow .lead{font-size:16.5px;}
  .hero-actions .btn{width:100%;}
  .prod-item{grid-template-columns:1fr;}
  .prod-media img{aspect-ratio:16/9;min-height:0;}
  .form-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-brand p{max-width:none;}
  .footer-bottom{flex-direction:column;text-align:center;gap:8px;}
  .cta-form{padding:22px;}
  details.faq summary{font-size:15px;padding:0 16px;}
  .faq-body{padding:0 16px 16px;}
  .mega{display:none;}
}

@media (max-width:560px){
  body{font-size:16px;line-height:1.8;}
  .header-inner{height:64px;}
  .logo-text{font-size:17px;}
  .btn{padding:12px 18px;font-size:14.5px;}
  .hero-narrow{padding:44px 0;}
  .table-hint{flex-direction:column;gap:6px;}
  .step{padding-left:46px;}
  .quote-card{padding:18px;}
  .cta-form{padding:18px;}
  .section{padding:48px 0;}
}

/* roulang page: category2 */
:root{
  --c-ink:#20242A;
  --c-ink-deep:#14171B;
  --c-rust:#B84A18;
  --c-rust-dark:#9C3D13;
  --c-rust-soft:#FBEFE8;
  --c-steel:#2F5D62;
  --c-steel-soft:#E8EFEF;
  --c-bg:#F6F4F0;
  --c-card:#FFFFFF;
  --c-bg-alt:#EDEAE4;
  --c-text:#1C2025;
  --c-body:#333A41;
  --c-muted:#5E6670;
  --c-weak:#8A9099;
  --c-line:#E1DDD5;
  --c-line-strong:#D6D0C6;
  --c-inverse:#EDEFF1;
  --c-success:#2E7D5B;
  --c-error:#B42318;
  --c-warn:#B7791F;
  --r-card:8px;
  --r-btn:6px;
  --r-input:6px;
  --r-tag:4px;
  --sh-card:0 1px 2px rgba(32,36,42,.05);
  --sh-hover:0 10px 24px rgba(32,36,42,.10);
  --font-base:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-num:"Barlow Condensed","Inter","DIN Alternate",system-ui,sans-serif;
  --w-container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-base);
  font-size:16.5px;
  line-height:1.85;
  color:var(--c-body);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease;}
a:hover{color:var(--c-rust);}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--c-text);font-weight:700;line-height:1.35;}
p{margin:0 0 .95em;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--c-rust);outline-offset:2px;}
.container{width:100%;max-width:var(--w-container);margin:0 auto;padding:0 24px;}
.section{padding:92px 0;}
.section--alt{background:var(--c-bg-alt);}
.section--tight{padding:64px 0;}

/* ============ Header / Nav ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:#fff;
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .2s ease;
}
.site-header.is-stuck{box-shadow:0 2px 10px rgba(0,0,0,.06);}
.header-inner{
  display:flex;align-items:center;gap:28px;
  min-height:70px;
}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  flex:0 0 auto;
  color:var(--c-ink);
}
.logo:hover{color:var(--c-ink);}
.logo-mark{
  width:26px;height:26px;flex:0 0 26px;
  background:var(--c-rust);
  border-radius:3px;
  position:relative;
  overflow:hidden;
}
.logo-mark::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,transparent 46%,var(--c-ink) 46%,var(--c-ink) 62%,transparent 62%);
}
.logo-text{
  font-size:20px;font-weight:700;letter-spacing:.5px;
  line-height:1;
  font-family:var(--font-num),var(--font-base);
}
.logo-text em{font-style:normal;color:var(--c-rust);font-family:var(--font-base);font-size:18px;letter-spacing:0;}
.main-nav{margin-left:auto;}
.main-nav > ul{
  display:flex;align-items:center;gap:4px;
}
.main-nav > ul > li{position:relative;}
.main-nav > ul > li > a{
  display:inline-flex;align-items:center;
  height:70px;padding:0 14px;
  font-size:15px;font-weight:500;color:var(--c-body);
  border-bottom:3px solid transparent;
  white-space:nowrap;
}
.main-nav > ul > li > a:hover{color:var(--c-rust);border-bottom-color:var(--c-rust-soft);}
.main-nav > ul > li > a.is-active,
.main-nav > ul > li > a[aria-current="page"]{
  color:var(--c-ink);font-weight:700;border-bottom-color:var(--c-rust);
}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;
  font-size:15px;font-weight:500;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  transition:background-color .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  text-align:center;
  line-height:1.3;
  min-height:44px;
}
.btn .arw{font-family:var(--font-num);font-size:16px;transition:transform .18s ease;}
.btn:hover .arw{transform:translateX(3px);}
.btn-primary{
  background:var(--c-ink);color:#fff;border-color:var(--c-ink);
}
.btn-primary .arw{color:var(--c-rust);}
.btn-primary:hover{background:var(--c-ink-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-hover);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:#fff;color:var(--c-ink);border-color:var(--c-line-strong);
}
.btn-ghost:hover{border-color:var(--c-ink);color:var(--c-ink);transform:translateY(-1px);}
.btn-rust{background:var(--c-rust);color:#fff;border-color:var(--c-rust);}
.btn-rust:hover{background:var(--c-rust-dark);color:#fff;transform:translateY(-1px);}
.btn-sm{padding:9px 18px;font-size:14px;min-height:40px;}
.btn-block{width:100%;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--c-line-strong);
  border-radius:var(--r-btn);
  background:#fff;
  align-items:center;justify-content:center;
  flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);border-radius:2px;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.nav-toggle span{transition:transform .2s ease,opacity .2s ease;}

/* Mega menu */
.has-mega > .mega{
  position:absolute;top:calc(100% - 6px);right:-8px;
  width:840px;max-width:calc(100vw - 48px);
  background:#fff;
  border:1px solid var(--c-line);
  border-top:2px solid var(--c-rust);
  box-shadow:0 18px 40px rgba(32,36,42,.12);
  border-radius:0 0 var(--r-card) var(--r-card);
  padding:24px 24px 0;
  opacity:0;visibility:hidden;transform:translateY(4px);
  transition:opacity .16s ease,transform .16s ease,visibility .16s;
  z-index:90;
}
.has-mega:hover > .mega,
.has-mega:focus-within > .mega{
  opacity:1;visibility:visible;transform:translateY(0);
}
.mega-grid{display:grid;grid-template-columns:1.15fr 1fr .95fr;gap:26px;padding-bottom:20px;}
.mega-col-title{
  font-size:12.5px;font-weight:700;letter-spacing:.14em;
  color:var(--c-weak);text-transform:uppercase;
  margin-bottom:12px;
}
.mega-links{display:grid;grid-template-columns:1fr 1fr;gap:2px 14px;}
.mega-links a{
  display:flex;align-items:center;gap:8px;
  padding:6px 0;font-size:14px;color:var(--c-body);
}
.mega-links a i{
  width:6px;height:6px;background:var(--c-rust);flex:0 0 6px;border-radius:1px;
  transition:background-color .18s ease;
}
.mega-links a:hover{color:var(--c-rust);}
.mega-posts li + li{margin-top:10px;}
.mega-posts a{display:block;padding:6px 0;}
.mega-posts .mt{display:block;font-size:14px;color:var(--c-body);line-height:1.55;}
.mega-posts a:hover .mt{color:var(--c-rust);}
.mega-posts .md{display:block;font-size:12.5px;color:var(--c-weak);margin-top:2px;}
.mega-card{
  border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;background:#fff;
}
.mega-card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--c-ink);}
.mega-card .mc-body{padding:12px 14px;}
.mega-card .mc-title{font-size:14px;font-weight:500;color:var(--c-text);}
.mega-card .mc-link{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--c-rust);margin-top:6px;}
.mega-foot{
  margin:0 -24px;
  padding:12px 24px;
  background:var(--c-bg-alt);
  border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13.5px;color:var(--c-muted);
  border-radius:0 0 var(--r-card) var(--r-card);
}
.mega-foot strong{color:var(--c-ink);font-family:var(--font-num);font-size:16px;letter-spacing:.4px;}
.mega-foot a{color:var(--c-rust);}

/* ============ Hero ============ */
.page-hero{
  position:relative;
  background:var(--c-ink-deep);
  color:var(--c-inverse);
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  opacity:.9;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(96deg,rgba(20,23,27,.94) 0%,rgba(20,23,27,.80) 46%,rgba(20,23,27,.34) 100%);
}
.page-hero .container{position:relative;z-index:2;padding-top:72px;padding-bottom:64px;}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:#B9C0C7;margin-bottom:22px;
}
.breadcrumb a{color:#B9C0C7;}
.breadcrumb a:hover{color:#fff;}
.breadcrumb span.sep{color:#6F767E;}
.breadcrumb .cur{color:#fff;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(184,74,24,.16);
  border:1px solid rgba(184,74,24,.55);
  color:#F2C6AF;
  font-size:12.5px;letter-spacing:.12em;
  padding:5px 12px;border-radius:var(--r-tag);
  margin-bottom:18px;
}
.page-hero h1{
  color:#fff;
  font-size:42px;line-height:1.25;
  max-width:16em;
  margin-bottom:16px;
}
.page-hero .hero-sub{
  font-size:18px;line-height:1.7;color:#D6DBE0;
  max-width:44em;margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
.hero-actions .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.42);}
.hero-actions .btn-ghost:hover{background:rgba(255,255,255,.10);color:#fff;border-color:#fff;}
.hero-note{font-size:13px;color:#9EA6AE;margin-top:16px;}

/* Trust strip */
.trust-strip{
  background:var(--c-ink);
  border-top:1px solid rgba(255,255,255,.12);
  position:relative;z-index:2;
}
.trust-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:0;
}
.trust-item{
  padding:18px 22px 18px 0;
  border-right:1px solid rgba(255,255,255,.12);
  color:var(--c-inverse);
}
.trust-item:last-child{border-right:0;}
.trust-item .tt{
  font-size:15px;font-weight:500;color:#fff;display:flex;align-items:center;gap:8px;
}
.trust-item .tt::before{
  content:"";width:8px;height:8px;background:var(--c-rust);border-radius:1px;flex:0 0 8px;
}
.trust-item .td{font-size:13px;color:#A8B0B8;margin-top:2px;padding-left:16px;}

/* ============ Section headings ============ */
.sec-head{
  display:flex;align-items:flex-start;gap:16px;
  margin-bottom:34px;
}
.sec-num{
  font-family:var(--font-num);
  font-size:15px;font-weight:700;letter-spacing:.16em;
  color:var(--c-rust);
  padding-top:9px;
  position:relative;
  flex:0 0 auto;
}
.sec-num::after{
  content:"";display:block;width:26px;height:2px;background:var(--c-rust);margin-top:8px;
}
.sec-head h2{font-size:30px;line-height:1.35;}
.sec-sub{font-size:16px;color:var(--c-muted);margin:8px 0 0;max-width:46em;}
.sec-head--center{flex-direction:column;align-items:center;text-align:center;gap:0;}
.sec-head--center .sec-num{padding-top:0;margin-bottom:10px;}
.sec-head--center .sec-num::after{margin:8px auto 0;}
.sec-head--center .sec-sub{margin-left:auto;margin-right:auto;}

/* ============ Intro / capability list ============ */
.intro-layout{
  display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:start;
}
.intro-lead{font-size:18px;line-height:1.75;color:var(--c-text);}
.intro-body p{color:var(--c-body);max-width:40em;}
.cap-list{display:grid;gap:0;border-top:1px solid var(--c-line);}
.cap-item{
  display:grid;grid-template-columns:56px 1fr;gap:16px;
  padding:18px 0;border-bottom:1px solid var(--c-line);
}
.cap-item .ci-num{
  font-family:var(--font-num);font-size:22px;font-weight:700;color:var(--c-rust);
  line-height:1.4;letter-spacing:.04em;
}
.cap-item .ci-title{font-size:16.5px;font-weight:700;color:var(--c-text);line-height:1.5;}
.cap-item .ci-desc{font-size:14.5px;color:var(--c-muted);margin-top:2px;}

/* ============ Process steps ============ */
.steps{
  display:grid;
  grid-template-columns:1.15fr 1.15fr 1fr 1fr;
  gap:20px;
  position:relative;
}
.steps::before{
  content:"";position:absolute;left:0;right:0;top:26px;height:1px;
  background:var(--c-line-strong);
}
.step{
  position:relative;z-index:2;
  background:var(--c-card);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:56px 20px 22px;
  box-shadow:var(--sh-card);
  transition:box-shadow .2s ease,border-color .2s ease,transform .2s ease;
}
.step:hover{box-shadow:var(--sh-hover);border-color:var(--c-line-strong);transform:translateY(-2px);}
.step .dot{
  position:absolute;top:10px;left:20px;
  width:36px;height:36px;border-radius:50%;
  background:var(--c-rust);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-size:17px;font-weight:700;
  letter-spacing:.02em;
}
.step h3{font-size:18px;font-weight:500;margin-bottom:8px;}
.step p{font-size:14.5px;color:var(--c-muted);line-height:1.75;margin-bottom:14px;}
.step .deliver{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;color:var(--c-steel);
  background:var(--c-steel-soft);
  border-radius:var(--r-tag);
  padding:4px 9px;
}

/* ============ Card wall ============ */
.wall{
  display:grid;
  grid-template-columns:repeat(6,1fr);
  gap:22px;
}
.card{
  background:var(--c-card);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--sh-card);
  transition:box-shadow .22s ease,border-color .22s ease,transform .22s ease;
  display:flex;flex-direction:column;
}
.card:hover{box-shadow:var(--sh-hover);border-color:var(--c-line-strong);transform:translateY(-2px);}
.card:hover .card-title{color:var(--c-rust);}
.card-media{position:relative;overflow:hidden;background:var(--c-ink);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.card:hover .card-media img{transform:scale(1.03);}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.card-tag{
  align-self:flex-start;
  font-size:12.5px;color:var(--c-steel);
  background:var(--c-steel-soft);
  padding:3px 9px;border-radius:var(--r-tag);
  margin-bottom:12px;
}
.card-title{font-size:19px;font-weight:500;line-height:1.45;color:var(--c-text);transition:color .18s ease;}
.card-text{font-size:14.5px;color:var(--c-muted);margin-top:8px;line-height:1.78;}
.card-specs{
  margin-top:14px;padding-top:14px;border-top:1px dashed var(--c-line);
  display:grid;grid-template-columns:1fr 1fr;gap:6px 14px;
  font-size:13px;color:var(--c-muted);
}
.card-specs b{color:var(--c-text);font-weight:500;}
.card-foot{
  margin-top:auto;padding-top:16px;
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:13.5px;color:var(--c-rust);
}
.card-foot .arw{font-family:var(--font-num);font-size:16px;}
.card--lg{grid-column:span 3;}
.card--lg .card-media{aspect-ratio:16/9;}
.card--lg .card-title{font-size:23px;}
.card--sm{grid-column:span 2;}
.card--sm .card-media{aspect-ratio:4/3;}
.card--sm .card-body{padding:18px;}
.card--sm .card-title{font-size:17px;}

/* ============ Stats band ============ */
.stats-band{
  background:var(--c-ink);
  color:var(--c-inverse);
  position:relative;
  overflow:hidden;
}
.stats-band::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(45deg,rgba(255,255,255,.05) 0 2px,transparent 2px 12px);
  pointer-events:none;
}
.stats-band .container{position:relative;z-index:2;}
.stats-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:38px;}
.stats-head h2{color:#fff;font-size:30px;}
.stats-head p{color:#A8B0B8;font-size:15px;margin:6px 0 0;max-width:36em;}
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid rgba(255,255,255,.12);
}
.stat{
  padding:28px 24px 6px 0;
  border-right:1px solid rgba(255,255,255,.12);
}
.stat:last-child{border-right:0;}
.stat .num{
  font-family:var(--font-num);
  font-size:40px;font-weight:700;line-height:1.1;
  color:#fff;letter-spacing:.01em;
  font-variant-numeric:tabular-nums;
}
.stat .num small{font-size:18px;font-weight:500;color:var(--c-rust);margin-left:5px;letter-spacing:.02em;}
.stat .label{font-size:14.5px;color:#C9CFD5;margin-top:8px;}
.stat .desc{font-size:12.5px;color:#8A9099;margin-top:4px;}

/* ============ Spec table ============ */
.table-layout{display:grid;grid-template-columns:1fr 1.35fr;gap:48px;align-items:start;}
.table-note{
  border-left:3px solid var(--c-rust);
  padding:4px 0 4px 16px;
  font-size:15px;color:var(--c-body);
  margin-bottom:18px;
}
.mini-list{display:grid;gap:10px;margin-top:6px;}
.mini-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14.5px;color:var(--c-muted);line-height:1.75;
}
.mini-list li::before{
  content:"";flex:0 0 8px;width:8px;height:8px;margin-top:9px;
  background:var(--c-rust);border-radius:1px;
}
.table-wrap{
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  background:var(--c-card);
  overflow-x:auto;
  box-shadow:var(--sh-card);
}
.spec-table{width:100%;border-collapse:collapse;min-width:520px;font-size:14.5px;}
.spec-table th{
  background:var(--c-steel);color:#fff;
  font-weight:500;font-size:13.5px;letter-spacing:.04em;
  text-align:left;padding:13px 16px;white-space:nowrap;
}
.spec-table td{
  padding:13px 16px;
  border-bottom:1px solid var(--c-line);
  color:var(--c-body);
  vertical-align:top;
}
.spec-table tbody tr:nth-child(even){background:#FAF9F6;}
.spec-table tbody tr:last-child td{border-bottom:0;}
.spec-table td:first-child{color:var(--c-text);font-weight:500;}
.spec-table .num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.02em;}
.table-hint{font-size:12.5px;color:var(--c-weak);margin-top:10px;}

/* ============ FAQ ============ */
.faq-wrap{max-width:820px;margin:0 auto;}
.faq-item{
  background:var(--c-card);
  border:1px solid var(--c-line);
  border-radius:var(--r-btn);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.faq-item:hover{border-color:var(--c-line-strong);box-shadow:var(--sh-card);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:17px 52px 17px 20px;
  position:relative;
  font-size:16px;font-weight:500;color:var(--c-text);
  line-height:1.55;
  min-height:56px;
  display:flex;align-items:center;
  transition:color .18s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  position:absolute;right:20px;top:50%;transform:translateY(-50%);
  font-family:var(--font-num);
  font-size:22px;font-weight:400;color:var(--c-rust);
  line-height:1;
  transition:transform .2s ease;
}
.faq-item[open]{border-color:var(--c-line-strong);border-left:3px solid var(--c-rust);}
.faq-item[open] summary{color:var(--c-ink);font-weight:500;}
.faq-item[open] summary::after{content:"−";}
.faq-a{padding:0 22px 18px 20px;font-size:15.5px;line-height:1.85;color:var(--c-muted);}
.faq-a p:last-child{margin-bottom:0;}

/* ============ CTA / Inquiry ============ */
.cta-band{
  background:var(--c-ink-deep);
  color:var(--c-inverse);
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(45deg,rgba(255,255,255,.045) 0 2px,transparent 2px 14px);
}
.cta-band .container{position:relative;z-index:2;}
.cta-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:start;}
.cta-copy h2{color:#fff;font-size:30px;margin-bottom:14px;}
.cta-copy p{color:#B9C0C7;font-size:15.5px;max-width:32em;}
.cta-contact{margin-top:28px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);display:grid;gap:14px;}
.cta-contact .ci-row{display:grid;gap:3px;}
.cta-contact .ci-label{font-size:12.5px;letter-spacing:.1em;color:#8A9099;}
.cta-contact .ci-val{font-size:17px;color:#fff;font-weight:500;}
.cta-contact .ci-val.num{font-family:var(--font-num);letter-spacing:.04em;}
.form-card{
  background:#fff;
  border-radius:var(--r-card);
  padding:28px;
  box-shadow:0 18px 40px rgba(0,0,0,.22);
}
.form-card h3{font-size:19px;margin-bottom:6px;}
.form-card .form-hint{font-size:13px;color:var(--c-weak);margin-bottom:20px;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{display:flex;flex-direction:column;gap:6px;}
.field.full{grid-column:1 / -1;}
.field label{font-size:13px;color:var(--c-muted);font-weight:500;}
.field label .req{color:var(--c-error);margin-left:2px;}
.field input,.field select,.field textarea{
  width:100%;
  height:44px;
  padding:0 12px;
  border:1px solid #D8D3CA;
  border-radius:var(--r-input);
  background:#fff;
  color:var(--c-text);
  font-size:15px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{height:auto;min-height:94px;padding:10px 12px;resize:vertical;line-height:1.7;}
.field input:hover,.field select:hover,.field textarea:hover{border-color:#C4BEB2;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-rust);box-shadow:0 0 0 2px rgba(184,74,24,.16);
}
.form-note{font-size:12.5px;color:var(--c-weak);margin-top:12px;line-height:1.7;}
.form-status{
  display:none;
  margin-top:14px;
  padding:10px 14px;
  border-radius:var(--r-btn);
  font-size:13.5px;
  background:#EAF5EF;color:var(--c-success);border:1px solid #CBE6D9;
}
.form-status.show{display:block;}

/* ============ Footer ============ */
.site-footer{
  background:var(--c-ink);
  color:#C9CFD5;
  padding:64px 0 0;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:46px;
}
.footer-brand .logo{color:#fff;margin-bottom:16px;}
.footer-brand .logo-text{color:#fff;}
.footer-brand .logo-text em{color:#E7A57F;}
.footer-brand p{font-size:13.5px;line-height:1.85;color:#A8B0B8;max-width:32em;margin-bottom:18px;}
.qr{
  width:96px;height:96px;
  border:1px dashed rgba(255,255,255,.28);
  border-radius:var(--r-tag);
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:12px;color:#8A9099;line-height:1.5;
  background:rgba(255,255,255,.03);
}
.footer-col h4{
  color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;
  padding-bottom:10px;border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-col ul li{margin-bottom:9px;}
.footer-col ul li a{font-size:14px;color:#C9CFD5;}
.footer-col ul li a:hover{color:var(--c-rust);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px;}
.footer-contact li{font-size:13.5px;line-height:1.8;color:#B4BBC2;margin-bottom:8px;}
.footer-contact li strong{color:#fff;font-family:var(--font-num);font-size:17px;font-weight:700;letter-spacing:.04em;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:18px 0 22px;
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:12.5px;color:#8A9099;
}

/* ============ Responsive ============ */
@media (max-width:1280px){
  .has-mega > .mega{width:800px;}
}
@media (max-width:1024px){
  .section{padding:72px 0;}
  .main-nav{
    position:fixed;top:0;right:0;
    width:86%;max-width:380px;height:100vh;
    background:#fff;
    border-left:1px solid var(--c-line);
    box-shadow:-12px 0 40px rgba(0,0,0,.16);
    transform:translateX(102%);
    transition:transform .26s ease;
    padding:78px 20px 28px;
    overflow-y:auto;
    margin-left:0;
    z-index:120;
  }
  .main-nav.is-open{transform:translateX(0);}
  .main-nav > ul{flex-direction:column;align-items:stretch;gap:0;}
  .main-nav > ul > li{border-bottom:1px solid var(--c-line);}
  .main-nav > ul > li > a{height:auto;padding:15px 4px;border-bottom:0;font-size:15.5px;white-space:normal;}
  .main-nav > ul > li > a.is-active{border-bottom:0;color:var(--c-rust);}
  .has-mega > .mega{
    position:static;width:auto;max-width:none;
    opacity:1;visibility:visible;transform:none;
    display:none;
    border:1px solid var(--c-line);border-top:0;
    box-shadow:none;border-radius:0;
    padding:14px 12px 0;margin-bottom:12px;
  }
  .has-mega.is-open > .mega{display:block;}
  .mega-grid{grid-template-columns:1fr;gap:18px;}
  .mega-links{grid-template-columns:1fr 1fr;}
  .mega-foot{margin:0 -12px;padding:12px;flex-wrap:wrap;}
  .nav-toggle{display:inline-flex;}
  .header-actions .btn{display:none;}
  .header-inner{gap:16px;}
  .intro-layout{grid-template-columns:1fr;gap:32px;}
  .steps{grid-template-columns:1fr 1fr;}
  .steps::before{display:none;}
  .step{padding-top:22px;padding-left:68px;}
  .step .dot{top:20px;left:18px;}
  .wall{grid-template-columns:repeat(4,1fr);}
  .card--lg{grid-column:span 4;}
  .card--sm{grid-column:span 2;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .stat{border-right:0;padding:24px 18px 6px 0;}
  .stat:nth-child(odd){border-right:1px solid rgba(255,255,255,.12);}
  .table-layout{grid-template-columns:1fr;gap:30px;}
  .cta-layout{grid-template-columns:1fr;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  body{font-size:16px;}
  .container{padding:0 18px;}
  .section{padding:56px 0;}
  .page-hero .container{padding-top:44px;padding-bottom:44px;}
  .page-hero h1{font-size:30px;}
  .page-hero .hero-sub{font-size:16.5px;}
  .sec-head h2,.stats-head h2,.cta-copy h2{font-size:24px;}
  .trust-grid{grid-template-columns:1fr 1fr;}
  .trust-item{padding:14px 16px 14px 0;}
  .trust-item:nth-child(2){border-right:0;}
  .trust-item:nth-child(1),.trust-item:nth-child(2){border-bottom:1px solid rgba(255,255,255,.12);}
  .steps{grid-template-columns:1fr;}
  .wall{grid-template-columns:1fr;}
  .card--lg,.card--sm{grid-column:span 1;}
  .card--lg .card-media,.card--sm .card-media{aspect-ratio:16/10;}
  .stats-grid{grid-template-columns:1fr;}
  .stat{padding:20px 0 4px;border-right:0 !important;border-bottom:1px solid rgba(255,255,255,.12);}
  .stat:last-child{border-bottom:0;}
  .stat .num{font-size:34px;}
  .form-grid{grid-template-columns:1fr;}
  .form-card{padding:22px 18px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .faq-item summary{font-size:15px;padding:15px 46px 15px 16px;}
  .faq-a{padding:0 16px 16px;}
}
@media (max-width:560px){
  .page-hero h1{font-size:28px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .card--lg .card-title{font-size:20px;}
  .spec-table{min-width:480px;}
  .mega-links{grid-template-columns:1fr;}
  .btn{width:100%;}
  .header-actions{gap:8px;}
  .logo-text{font-size:18px;}
  .logo-text em{font-size:16px;}
}

/* roulang page: category3 */
:root{
  --c-ink:#20242A;
  --c-ink-deep:#14171B;
  --c-iron:#B84A18;
  --c-iron-h:#9C3D13;
  --c-iron-soft:#FBEFE8;
  --c-steel:#2F5D62;
  --c-steel-soft:#E7EEEE;
  --c-bg:#F6F4F0;
  --c-bg-2:#EDEAE4;
  --c-card:#FFFFFF;
  --c-text:#1C2025;
  --c-body:#333A41;
  --c-muted:#5E6670;
  --c-weak:#8A9099;
  --c-inverse:#EDEFF1;
  --c-line:#E1DDD5;
  --c-line-strong:#D6D0C6;
  --r-card:8px;
  --r-btn:6px;
  --r-input:6px;
  --r-tag:4px;
  --sh-1:0 1px 2px rgba(32,36,42,.05);
  --sh-2:0 10px 24px rgba(32,36,42,.10);
  --w:1200px;
  --gap:24px;
  --sec:96px;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-num:"Barlow Condensed","Inter","PingFang SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  color:var(--c-body);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--c-text);font-weight:700;line-height:1.35}
h1{font-size:42px;line-height:1.25;letter-spacing:-.4px}
h2{font-size:30px;line-height:1.35}
h3{font-size:21px;line-height:1.45;font-weight:500}
h4{font-size:15px}
p{margin:0}
p+p{margin-top:1em}
strong{font-weight:700;color:var(--c-text)}
.container{width:100%;max-width:var(--w);margin:0 auto;padding:0 24px}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.4px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15.5px;font-weight:500;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn:active{transform:translateY(1px)}
.btn:focus-visible{outline:2px solid var(--c-iron);outline-offset:2px}
.btn-primary{background:var(--c-ink);color:#fff}
.btn-primary:hover{background:var(--c-ink-deep);box-shadow:var(--sh-2)}
.btn-primary .arw{color:var(--c-iron);font-family:var(--font-num);font-size:17px;transition:transform .18s ease}
.btn-primary:hover .arw{transform:translateX(3px)}
.btn-ghost{background:#fff;color:var(--c-text);border-color:var(--c-line-strong)}
.btn-ghost:hover{border-color:var(--c-iron);color:var(--c-iron)}
.btn-outline-light{background:transparent;color:var(--c-inverse);border-color:rgba(255,255,255,.42)}
.btn-outline-light:hover{background:rgba(255,255,255,.10);border-color:#fff;color:#fff}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px}
.btn-block{width:100%}

/* ---------- 头部与导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;background:#fff;
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .22s ease;
}
.site-header.is-stuck{box-shadow:0 2px 10px rgba(0,0,0,.06)}
.header-inner{display:flex;align-items:center;gap:28px;min-height:70px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:none}
.logo-mark{
  position:relative;width:26px;height:26px;border-radius:3px;flex:none;
  background:linear-gradient(135deg,var(--c-ink) 0 55%,var(--c-iron) 55% 100%);
}
.logo-mark::after{content:"";position:absolute;inset:6px;border:2px solid rgba(255,255,255,.68);border-radius:50%}
.logo-text{font-size:19px;font-weight:700;color:var(--c-ink);letter-spacing:.5px;line-height:1}
.logo-text em{font-style:normal;color:var(--c-iron)}

.main-nav{margin-left:auto}
.main-nav > ul{display:flex;align-items:center;gap:2px}
.main-nav > ul > li > a{
  position:relative;display:block;padding:0 11px;line-height:70px;
  font-size:15px;font-weight:500;color:var(--c-text);white-space:nowrap;
}
.main-nav > ul > li > a:hover{color:var(--c-iron)}
.main-nav > ul > li > a.is-active{color:var(--c-iron)}
.main-nav > ul > li > a.is-active::after{
  content:"";position:absolute;left:11px;right:11px;bottom:0;height:3px;background:var(--c-iron);
}
.nav-cta-mobile{display:none}
.header-actions{display:flex;align-items:center;gap:12px;flex:none}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--c-line-strong);border-radius:var(--r-btn);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;background:#fff;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);transition:transform .22s ease,opacity .22s ease}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.nav-open .nav-toggle span:nth-child(2){opacity:0}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-mask{
  position:fixed;inset:0;background:rgba(20,23,27,.5);opacity:0;visibility:hidden;
  transition:opacity .24s ease,visibility .24s;z-index:110;
}
body.nav-open .nav-mask{opacity:1;visibility:visible}

/* Mega 面板 */
.has-mega{position:relative}
.mega{
  position:absolute;top:100%;right:0;width:820px;z-index:60;
  background:#fff;border:1px solid var(--c-line);border-top:2px solid var(--c-iron);
  border-radius:0 0 var(--r-card) var(--r-card);box-shadow:var(--sh-2);
  padding:24px;opacity:0;visibility:hidden;transform:translateY(4px);
  transition:opacity .16s ease,transform .16s ease,visibility .16s;
}
.has-mega:hover .mega,.has-mega:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0)}
.mega-grid{display:grid;grid-template-columns:1.1fr 1.1fr .9fr;gap:24px}
.mega-col-title{font-size:12.5px;letter-spacing:1.2px;color:var(--c-weak);font-weight:700;margin-bottom:12px}
.mega-links{display:grid;grid-template-columns:1fr 1fr;gap:6px 16px}
.mega-links a{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--c-body);padding:4px 0}
.mega-links a:hover{color:var(--c-iron)}
.mega-links a i{width:7px;height:7px;background:var(--c-iron);flex:none}
.mega-posts li+li{margin-top:12px}
.mega-posts .mt{display:block;font-size:14px;font-weight:500;color:var(--c-text);line-height:1.5}
.mega-posts .md{display:block;font-size:12.5px;color:var(--c-weak);margin-top:2px}
.mega-posts a:hover .mt{color:var(--c-iron)}
.mega-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:6px;background:var(--c-ink)}
.mega-card .mc-title{display:block;font-size:14px;font-weight:500;margin-top:10px;color:var(--c-text)}
.mega-card .mc-link{display:inline-block;font-size:12.5px;color:var(--c-iron);margin-top:2px}
.mega-foot{
  margin-top:20px;padding:10px 16px;border-radius:6px;background:var(--c-bg-2);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13.5px;color:var(--c-muted);
}
.mega-foot a{color:var(--c-iron);font-weight:500}

/* ---------- 页面 Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;color:var(--c-inverse);
  background:var(--c-ink) url("/assets/images/backpic/back-2.png") center/cover no-repeat;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(20,23,27,.94) 0%,rgba(20,23,27,.80) 42%,rgba(20,23,27,.42) 100%);
}
.page-hero .container{position:relative;z-index:2;padding-top:30px;padding-bottom:64px}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(237,239,241,.68);flex-wrap:wrap}
.crumb a:hover{color:var(--c-iron)}
.crumb .sep{color:rgba(237,239,241,.36)}
.crumb .now{color:#fff}
.hero-kicker{
  display:inline-flex;align-items:center;gap:10px;margin-top:34px;
  font-size:12.5px;letter-spacing:2px;color:#F0C9B4;font-weight:500;
}
.hero-kicker::before{content:"";width:26px;height:2px;background:var(--c-iron)}
.page-hero h1{color:#fff;margin-top:14px;max-width:760px}
.page-hero .lead{
  margin-top:18px;max-width:660px;font-size:18px;line-height:1.7;color:rgba(237,239,241,.86);
}
.hero-metrics{
  display:flex;flex-wrap:wrap;gap:36px;margin-top:38px;
  padding-top:26px;border-top:1px solid rgba(255,255,255,.14);max-width:820px;
}
.hero-metrics .m{min-width:130px}
.hero-metrics .mv{font-family:var(--font-num);font-size:34px;font-weight:700;color:#fff;line-height:1.1;font-variant-numeric:tabular-nums}
.hero-metrics .mv small{font-size:14px;font-weight:400;color:rgba(237,239,241,.7);margin-left:6px;font-family:var(--font)}
.hero-metrics .ml{font-size:13px;color:rgba(237,239,241,.66);margin-top:6px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}
.hero-note{font-size:13px;color:rgba(237,239,241,.6);margin-top:14px}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sec) 0}
.section.alt{background:var(--c-bg-2)}
.section.dark{background:var(--c-ink);color:var(--c-inverse)}
.sec-head{max-width:780px;margin-bottom:38px}
.sec-num{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-num);font-size:14px;font-weight:700;letter-spacing:2px;color:var(--c-iron);
}
.sec-num::after{content:"";width:28px;height:2px;background:var(--c-iron)}
.sec-head h2{margin-top:12px}
.sec-head p{margin-top:14px;font-size:16.5px;color:var(--c-muted);max-width:680px}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}

/* ---------- 交替图文 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.split+.split{margin-top:76px}
.split.rev .split-media{order:2}
.split-media{position:relative}
.split-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-card);
  border:1px solid var(--c-line);background:var(--c-ink);
}
.split-media .badge-float{
  position:absolute;left:18px;bottom:18px;background:#fff;border-radius:6px;
  padding:10px 16px;box-shadow:var(--sh-2);font-size:13.5px;color:var(--c-muted);
  border-left:3px solid var(--c-iron);
}
.split-media .badge-float b{display:block;font-size:19px;color:var(--c-text);font-family:var(--font-num);font-variant-numeric:tabular-nums}
.split-body .tag{
  display:inline-block;padding:3px 10px;border-radius:var(--r-tag);
  background:var(--c-steel-soft);color:var(--c-steel);font-size:12.5px;font-weight:500;
}
.split-body h3{margin-top:14px;font-size:24px;font-weight:700}
.split-body p{margin-top:14px;color:var(--c-body)}
.check-list{margin-top:20px;display:grid;gap:10px}
.check-list li{
  position:relative;padding-left:24px;font-size:15px;color:var(--c-body);line-height:1.7;
}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;
  background:var(--c-iron);border-radius:1px;
}
.check-list li b{color:var(--c-text);font-weight:500}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;max-width:880px}
.timeline::before{content:"";position:absolute;left:19px;top:10px;bottom:10px;width:1px;background:var(--c-line-strong)}
.tl-item{position:relative;padding-left:64px;padding-bottom:34px}
.tl-item:last-child{padding-bottom:0}
.tl-num{
  position:absolute;left:0;top:0;width:38px;height:38px;border-radius:50%;
  background:var(--c-iron);color:#fff;display:grid;place-items:center;
  font-family:var(--font-num);font-size:15px;font-weight:700;font-variant-numeric:tabular-nums;
  box-shadow:0 0 0 6px var(--c-bg);
}
.section.alt .tl-num{box-shadow:0 0 0 6px var(--c-bg-2)}
.tl-item h3{font-size:19px;font-weight:700;color:var(--c-text)}
.tl-item p{margin-top:8px;font-size:15.5px;color:var(--c-muted);max-width:620px}
.tl-tag{
  display:inline-block;margin-top:12px;padding:2px 10px;border-radius:var(--r-tag);
  border:1px solid var(--c-line-strong);background:#fff;
  font-size:12.5px;color:var(--c-weak);
}

/* ---------- 表格 ---------- */
.table-wrap{
  overflow-x:auto;border:1px solid var(--c-line);border-radius:var(--r-card);
  background:#fff;box-shadow:var(--sh-1);
}
.data-table{width:100%;border-collapse:collapse;min-width:680px}
.data-table thead th{
  background:var(--c-steel);color:#fff;font-size:14px;font-weight:500;
  text-align:left;padding:14px 20px;letter-spacing:.4px;
}
.data-table tbody td{padding:15px 20px;font-size:15px;border-top:1px solid var(--c-line);color:var(--c-body)}
.data-table tbody td:first-child{color:var(--c-text);font-weight:500}
.data-table tbody tr:nth-child(even){background:#FAF9F6}
.data-table tbody tr:hover{background:var(--c-iron-soft)}
.table-note{margin-top:14px;font-size:13.5px;color:var(--c-weak)}

/* ---------- 保障卡片 ---------- */
.guard-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:24px}
.guard-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:30px;box-shadow:var(--sh-1);transition:box-shadow .2s ease,border-color .2s ease,transform .2s ease;
}
.guard-card:hover{box-shadow:var(--sh-2);border-color:var(--c-line-strong);transform:translateY(-2px)}
.guard-card.big{grid-row:span 2;padding:38px;background:linear-gradient(160deg,#FFFFFF 0%,#FBF7F2 100%)}
.guard-card .gc-num{
  font-family:var(--font-num);font-size:13px;font-weight:700;letter-spacing:2px;color:var(--c-iron);
}
.guard-card h3{margin-top:12px;font-size:20px;font-weight:700}
.guard-card.big h3{font-size:26px}
.guard-card p{margin-top:12px;font-size:15.5px;color:var(--c-muted)}
.guard-card .gc-list{margin-top:18px;display:grid;gap:8px}
.guard-card .gc-list li{position:relative;padding-left:20px;font-size:14.5px;color:var(--c-body)}
.guard-card .gc-list li::before{
  content:"";position:absolute;left:0;top:9px;width:10px;height:2px;background:var(--c-iron);
}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:6px;
  margin-bottom:12px;position:relative;overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:var(--c-line-strong)}
.faq-item[open]{border-color:var(--c-line-strong);box-shadow:var(--sh-1)}
.faq-item[open]::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--c-iron)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:18px;padding:14px 22px;min-height:56px;
  font-size:16px;font-weight:500;color:var(--c-text);line-height:1.5;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--c-iron)}
.faq-item summary:focus-visible{outline:2px solid var(--c-iron);outline-offset:-2px}
.faq-item summary::after{
  content:"+";font-family:var(--font-num);font-size:22px;font-weight:400;
  color:var(--c-iron);line-height:1;flex:none;
}
.faq-item[open] summary::after{content:"−"}
.faq-item[open] summary{font-weight:500;color:var(--c-iron)}
.faq-body{padding:2px 22px 18px;font-size:15.5px;line-height:1.85;color:var(--c-body)}
.faq-body p{margin:0}

/* ---------- CTA 表单 ---------- */
.cta{position:relative;overflow:hidden;background:var(--c-ink);color:var(--c-inverse);padding:var(--sec) 0}
.cta::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(45deg,rgba(255,255,255,.045) 0 2px,transparent 2px 14px);
}
.cta .container{position:relative;z-index:2}
.cta-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:56px;align-items:start}
.cta-copy .sec-num{color:#E8A57E}
.cta-copy .sec-num::after{background:#E8A57E}
.cta-copy h2{color:#fff;margin-top:12px}
.cta-copy p{margin-top:16px;font-size:16.5px;color:rgba(237,239,241,.78);max-width:460px}
.cta-contact{margin-top:32px;padding-top:24px;border-top:1px solid rgba(255,255,255,.14);display:grid;gap:12px}
.cta-contact .row{display:flex;gap:12px;font-size:14.5px;color:rgba(237,239,241,.8)}
.cta-contact .row span:first-child{color:var(--c-weak);min-width:72px;flex:none}
.cta-contact .row b{color:#fff;font-family:var(--font-num);font-size:17px;letter-spacing:.5px}
.form-card{background:#fff;border-radius:var(--r-card);padding:32px;box-shadow:var(--sh-2)}
.form-card h3{font-size:20px;font-weight:700;color:var(--c-text)}
.form-card .fc-sub{margin-top:6px;font-size:13.5px;color:var(--c-weak)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:22px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;color:var(--c-muted);font-weight:500}
.field label .req{color:var(--c-iron);margin-left:2px}
.field input,.field select,.field textarea{
  width:100%;height:44px;padding:0 12px;font-family:inherit;font-size:15px;color:var(--c-text);
  background:#fff;border:1px solid #D8D3CA;border-radius:var(--r-input);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{height:96px;padding:10px 12px;line-height:1.7;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-iron);box-shadow:0 0 0 2px rgba(184,74,24,.18);
}
.field input::placeholder,.field textarea::placeholder{color:#B3B8BE}
.form-note{margin-top:14px;font-size:12.5px;color:var(--c-weak);line-height:1.7}
.form-submit{margin-top:20px}
.form-success{
  display:none;margin-top:16px;padding:12px 16px;border-radius:6px;
  background:#E9F5EF;border:1px solid #BFE3D2;color:#2E7D5B;font-size:14px;
}
.form-success.show{display:block}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-ink);color:#C9CFD5;padding:64px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.15fr;gap:44px}
.footer-brand .logo{margin-bottom:16px}
.site-footer .logo-text{color:#fff}
.site-footer .logo-text em{color:#E8A57E}
.site-footer .logo-mark{background:linear-gradient(135deg,#FFFFFF 0 55%,var(--c-iron) 55% 100%)}
.site-footer .logo-mark::after{border-color:rgba(32,36,42,.55)}
.footer-brand p{font-size:14px;line-height:1.85;color:#A9B1B9;max-width:340px}
.qr{
  margin-top:20px;width:96px;height:96px;border:1px dashed rgba(255,255,255,.28);border-radius:6px;
  display:grid;place-items:center;font-size:12px;line-height:1.5;text-align:center;color:#8E979F;
}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:#C9CFD5;transition:color .18s ease,text-decoration-color .18s ease}
.footer-col a:hover{color:#E8A57E;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px}
.footer-contact li{font-size:14px;color:#A9B1B9;line-height:1.75}
.footer-contact li strong{display:block;color:#fff;font-family:var(--font-num);font-size:19px;letter-spacing:.6px;margin-bottom:2px}
.footer-bottom{
  margin-top:48px;padding:20px 0 26px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:12.5px;color:#8E979F;
}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .main-nav > ul > li > a{padding:0 8px;font-size:14.5px}
  .mega{width:720px}
}
@media (max-width:1024px){
  :root{--sec:72px}
  .nav-toggle{display:inline-flex}
  .main-nav{
    position:fixed;top:0;right:0;width:86%;max-width:370px;height:100vh;z-index:120;
    background:#fff;padding:82px 20px 40px;overflow-y:auto;
    box-shadow:-10px 0 34px rgba(0,0,0,.16);
    transform:translateX(102%);transition:transform .28s ease;margin-left:0;
  }
  body.nav-open .main-nav{transform:translateX(0)}
  .main-nav > ul{flex-direction:column;align-items:stretch;gap:0}
  .main-nav > ul > li > a{
    line-height:1.45;padding:15px 4px;font-size:16px;border-bottom:1px solid var(--c-line);white-space:normal;
  }
  .main-nav > ul > li > a.is-active::after{display:none}
  .main-nav > ul > li > a.is-active{background:var(--c-iron-soft)}
  .mega{
    display:none;position:static;width:auto;padding:10px 0 16px;border:0;border-radius:0;
    box-shadow:none;opacity:1;visibility:visible;transform:none;background:#FAF9F6;
  }
  .has-mega.open .mega{display:block}
  .has-mega:hover .mega{opacity:1;visibility:visible}
  .mega-grid{grid-template-columns:1fr;gap:18px}
  .mega-links{grid-template-columns:1fr}
  .nav-cta-mobile{display:block;padding-top:18px}
  .nav-cta-mobile .btn{width:100%}
  .header-actions .btn-primary{display:none}
  h1{font-size:34px}
  .split{grid-template-columns:1fr;gap:28px}
  .split.rev .split-media{order:0}
  .cta-grid{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .guard-grid{grid-template-columns:1fr}
  .guard-card.big{grid-row:auto}
}
@media (max-width:768px){
  :root{--sec:56px}
  .container{padding:0 18px}
  h1{font-size:30px}
  h2{font-size:24px}
  h3{font-size:18px}
  body{font-size:16px;line-height:1.8}
  .page-hero .container{padding-bottom:48px}
  .page-hero .lead{font-size:16px}
  .hero-metrics{gap:22px 32px;row-gap:22px}
  .hero-metrics .m{min-width:calc(50% - 16px)}
  .hero-metrics .mv{font-size:28px}
  .hero-actions .btn{flex:1 1 100%}
  .form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;text-align:center;align-items:center}
  .split-media .badge-float{position:static;margin-top:12px;box-shadow:none;border:1px solid var(--c-line);border-left:3px solid var(--c-iron)}
  .data-table thead th,.data-table tbody td{padding:12px 14px}
  .faq-item summary{padding:12px 16px;font-size:15.5px}
  .faq-body{padding:0 16px 16px;font-size:15px}
  .form-card{padding:24px}
  .guard-card{padding:24px}
  .guard-card.big{padding:26px}
}
@media (max-width:560px){
  .header-inner{min-height:62px;gap:12px}
  .logo-text{font-size:17px}
  .hero-kicker{margin-top:24px;letter-spacing:1.4px}
  .sec-head{margin-bottom:26px}
  .split+.split{margin-top:48px}
  .tl-item{padding-left:52px}
  .tl-num{width:34px;height:34px;font-size:13.5px}
  .timeline::before{left:17px}
  .btn{min-height:44px}
  .table-note{font-size:12.5px}
}

/* roulang page: category4 */
:root{
  --c-ink:#20242A;
  --c-ink-deep:#14171B;
  --c-rust:#B84A18;
  --c-rust-hover:#9C3D13;
  --c-rust-soft:#FBEFE8;
  --c-steel:#2F5D62;
  --c-steel-soft:#E8EFEF;
  --c-bg:#F6F4F0;
  --c-card:#FFFFFF;
  --c-bg-2:#EDEAE4;
  --c-text:#1C2025;
  --c-body:#333A41;
  --c-muted:#5E6670;
  --c-weak:#8A9099;
  --c-line:#E1DDD5;
  --c-line-strong:#D6D0C6;
  --c-inverse:#EDEFF1;
  --c-ok:#2E7D5B;
  --radius-card:8px;
  --radius-btn:6px;
  --radius-tag:4px;
  --shadow-1:0 1px 2px rgba(32,36,42,.05);
  --shadow-2:0 10px 24px rgba(32,36,42,.10);
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --font-num:"Barlow Condensed","Inter",system-ui,sans-serif;
  --w:1200px;
  --pad:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.85;
  color:var(--c-body);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;transition:color .18s ease;}
img{max-width:100%;display:block;border:0;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;}
:focus-visible{outline:2px solid var(--c-rust);outline-offset:2px;}
.container{max-width:var(--w);margin:0 auto;padding:0 var(--pad);}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.02em;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:130;
  background:#fff;
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .2s ease;
}
.site-header.is-stuck{box-shadow:0 2px 10px rgba(0,0,0,.06);}
.header-inner{
  max-width:var(--w);margin:0 auto;padding:0 var(--pad);
  height:72px;display:flex;align-items:center;gap:26px;
}
.logo{display:flex;align-items:center;gap:10px;flex:none;}
.logo-mark{
  width:26px;height:26px;flex:none;
  background:var(--c-ink);
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
  position:relative;
}
.logo-mark::after{
  content:"";position:absolute;left:5px;top:11px;width:16px;height:2px;background:var(--c-rust);
}
.logo-text{font-size:19px;font-weight:700;color:var(--c-ink);letter-spacing:.4px;white-space:nowrap;}
.logo-text em{font-style:normal;color:var(--c-rust);}
.main-nav{flex:1 1 auto;min-width:0;}
.main-nav > ul{display:flex;align-items:center;gap:0;}
.main-nav > ul > li{position:relative;}
.main-nav > ul > li > a{
  display:flex;align-items:center;height:72px;padding:0 13px;
  font-size:15px;font-weight:500;color:var(--c-body);
  position:relative;white-space:nowrap;
}
.main-nav > ul > li > a::after{
  content:"";position:absolute;left:13px;right:13px;bottom:0;height:3px;
  background:transparent;transition:background .18s ease;
}
.main-nav > ul > li > a:hover{color:var(--c-rust);}
.main-nav > ul > li > a:hover::after{background:var(--c-rust);}
.main-nav > ul > li > a.is-active{color:var(--c-ink);font-weight:700;}
.main-nav > ul > li > a.is-active::after{background:var(--c-rust);}
.head-actions{display:flex;align-items:center;gap:12px;flex:none;}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 18px;
  background:var(--c-ink);color:#fff;border-radius:var(--radius-btn);
  font-size:14.5px;font-weight:500;border:1px solid var(--c-ink);
  transition:background .18s ease,transform .18s ease,box-shadow .18s ease;
  white-space:nowrap;
}
.nav-cta span{color:#E8915C;font-family:var(--font-num);}
.nav-cta:hover{background:var(--c-ink-deep);transform:translateY(-1px);box-shadow:0 6px 16px rgba(20,23,27,.18);}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--c-line-strong);
  background:#fff;border-radius:var(--radius-btn);position:relative;flex:none;
}
.nav-toggle i{
  position:absolute;left:11px;right:11px;height:2px;background:var(--c-ink);transition:.2s ease;
}
.nav-toggle i:nth-child(1){top:14px;}
.nav-toggle i:nth-child(2){top:20px;}
.nav-toggle i:nth-child(3){top:26px;}

/* mega */
.has-mega > a::before{
  content:"";width:5px;height:5px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;
  transform:rotate(45deg);margin-left:7px;margin-top:-3px;
}
.mega{
  position:absolute;top:100%;right:-60px;width:840px;
  background:#fff;border:1px solid var(--c-line);border-top:2px solid var(--c-rust);
  border-radius:0 0 var(--radius-card) var(--radius-card);
  box-shadow:var(--shadow-2);padding:24px;
  opacity:0;visibility:hidden;transform:translateY(4px);
  transition:opacity .16s ease,transform .16s ease,visibility .16s;
}
.has-mega:hover .mega,.has-mega:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0);}
.mega-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:26px;}
.mega-col-title{
  font-size:12.5px;font-weight:700;letter-spacing:.1em;color:var(--c-ink);
  margin-bottom:14px;padding-left:10px;position:relative;
}
.mega-col-title::before{
  content:"";position:absolute;left:0;top:6px;width:2px;height:12px;background:var(--c-rust);
}
.mega-links{display:grid;grid-template-columns:1fr 1fr;gap:9px 14px;}
.mega-links a{
  display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--c-muted);
  line-height:1.5;padding:3px 0;
}
.mega-links a i{width:8px;height:8px;background:var(--c-rust);border-radius:1px;flex:none;display:block;}
.mega-links a:hover{color:var(--c-rust);}
.mega-posts li + li{margin-top:12px;padding-top:12px;border-top:1px solid var(--c-line);}
.mega-posts a{display:block;}
.mega-posts .mt{display:block;font-size:13.5px;line-height:1.55;color:var(--c-body);}
.mega-posts .md{display:block;font-size:12px;color:var(--c-weak);margin-top:3px;}
.mega-posts a:hover .mt{color:var(--c-rust);}
.mega-card img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:6px;
  background:var(--c-ink);box-shadow:var(--shadow-1);
}
.mega-card .mc-title{
  font-size:13.5px;color:var(--c-text);font-weight:500;margin-top:10px;display:flex;
  justify-content:space-between;align-items:center;gap:8px;
}
.mega-card .mc-title span{color:var(--c-rust);font-family:var(--font-num);}
.mega-card a:hover .mc-title{color:var(--c-rust);}
.mega-foot{
  margin-top:20px;padding-top:14px;border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:var(--c-muted);
}
.mega-foot strong{color:var(--c-ink);font-family:var(--font-num);font-size:15px;letter-spacing:.03em;}

/* ---------- Breadcrumb & page hero ---------- */
.crumb{padding:22px 0 0;font-size:13px;color:var(--c-weak);}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li + li::before{content:"/";color:var(--c-line-strong);}
.crumb a:hover{color:var(--c-rust);}
.crumb .cur{color:var(--c-muted);}

.page-hero{padding:26px 0 44px;}
.page-hero .ph-inner{max-width:820px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;letter-spacing:.14em;color:var(--c-rust);
  font-family:var(--font-num);text-transform:uppercase;margin-bottom:16px;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--c-rust);display:block;}
.page-hero h1{
  font-size:42px;line-height:1.25;font-weight:700;color:var(--c-text);
  letter-spacing:-.5px;
}
.page-hero .lead{
  margin-top:18px;font-size:18px;line-height:1.7;color:var(--c-muted);max-width:41em;
}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  height:32px;padding:0 13px;border-radius:var(--radius-tag);
  background:var(--c-steel-soft);color:var(--c-steel);
  font-size:12.5px;font-weight:500;letter-spacing:.02em;
}
.chip.rust{background:var(--c-rust-soft);color:var(--c-rust);}
.chip.line{background:#fff;border:1px solid var(--c-line);color:var(--c-muted);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:46px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:500;border:1px solid transparent;
  transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn .arw{font-family:var(--font-num);color:#E8915C;transition:transform .18s ease;}
.btn:hover .arw{transform:translateX(3px);}
.btn-primary{background:var(--c-ink);color:#fff;border-color:var(--c-ink);}
.btn-primary:hover{background:var(--c-ink-deep);transform:translateY(-1px);box-shadow:0 8px 20px rgba(20,23,27,.18);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--c-ink);border-color:var(--c-line-strong);}
.btn-ghost:hover{border-color:var(--c-rust);color:var(--c-rust);}
.btn-light{background:#fff;color:var(--c-ink);border-color:#fff;}
.btn-light:hover{background:var(--c-rust);border-color:var(--c-rust);color:#fff;transform:translateY(-1px);}
.btn-light:hover .arw{color:#fff;}

/* ---------- Sections ---------- */
.section{padding:88px 0;}
.section.tight{padding:64px 0;}
.section.alt{background:#fff;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.sec-head{margin-bottom:34px;}
.sec-head .kicker{
  display:flex;align-items:center;gap:10px;margin-bottom:14px;
  font-family:var(--font-num);font-size:13.5px;letter-spacing:.16em;color:var(--c-rust);
}
.sec-head .kicker::before{content:"";width:22px;height:2px;background:var(--c-rust);}
.sec-head h2{font-size:30px;line-height:1.35;font-weight:700;color:var(--c-text);letter-spacing:-.2px;}
.sec-head .desc{margin-top:14px;font-size:16px;color:var(--c-muted);max-width:44em;line-height:1.8;}
.sec-head.split{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;flex-wrap:wrap;}

/* ---------- Figure + float card ---------- */
.figure-wrap{
  position:relative;border-radius:var(--radius-card);overflow:hidden;
  background:var(--c-ink);box-shadow:var(--shadow-1);
}
.figure-wrap img{
  width:100%;aspect-ratio:21/9;object-fit:cover;display:block;
  background:var(--c-ink);
}
.figure-wrap::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(20,23,27,.75) 0%,rgba(20,23,27,.28) 45%,rgba(20,23,27,.10) 100%);
  pointer-events:none;
}
.figure-caption{
  position:absolute;left:44px;top:44px;z-index:2;color:var(--c-inverse);max-width:420px;
}
.figure-caption .fc-kicker{
  font-family:var(--font-num);font-size:13px;letter-spacing:.16em;color:#E8915C;margin-bottom:12px;
}
.figure-caption h3{font-size:26px;line-height:1.4;font-weight:700;color:#fff;}
.figure-caption p{margin-top:12px;font-size:15px;line-height:1.8;color:rgba(237,239,241,.82);}
.float-card{
  position:absolute;right:40px;bottom:40px;z-index:3;
  width:360px;background:#fff;border-radius:var(--radius-card);
  padding:24px 26px;box-shadow:var(--shadow-2);
}
.float-card h4{
  font-size:14px;font-weight:700;color:var(--c-ink);letter-spacing:.04em;
  padding-bottom:14px;border-bottom:1px solid var(--c-line);margin-bottom:6px;
}
.float-card dl{margin:0;}
.float-card .fc-row{
  display:flex;align-items:baseline;justify-content:space-between;gap:14px;
  padding:11px 0;border-bottom:1px dashed var(--c-line);
}
.float-card .fc-row:last-child{border-bottom:0;padding-bottom:0;}
.float-card dt{font-size:14px;color:var(--c-muted);}
.float-card dd{
  font-family:var(--font-num);font-size:19px;font-weight:700;color:var(--c-rust);
  letter-spacing:.02em;text-align:right;
}
.float-card .fc-note{margin-top:12px;font-size:12.5px;color:var(--c-weak);line-height:1.7;}

/* ---------- Compare lists ---------- */
.compare{
  display:grid;grid-template-columns:1fr 1fr;
  border:1px solid var(--c-line);border-radius:var(--radius-card);
  overflow:hidden;background:#fff;box-shadow:var(--shadow-1);
}
.compare-col{padding:34px 34px 30px;}
.compare-col + .compare-col{border-left:1px solid var(--c-line);background:var(--c-rust-soft);}
.compare-col h3{
  font-size:19px;font-weight:700;color:var(--c-text);margin-bottom:6px;line-height:1.5;
}
.compare-col .cc-sub{font-size:13.5px;color:var(--c-muted);margin-bottom:20px;}
.compare-list li{
  position:relative;padding-left:28px;margin-bottom:18px;font-size:15.5px;line-height:1.8;color:var(--c-body);
}
.compare-list li:last-child{margin-bottom:0;}
.compare-list li strong{display:block;font-weight:700;color:var(--c-text);margin-bottom:2px;font-size:15.5px;}
.compare-list li span{color:var(--c-muted);font-size:14.5px;}
.compare-list li::before{
  content:"";position:absolute;left:4px;top:9px;width:6px;height:11px;
  border-right:2px solid var(--c-rust);border-bottom:2px solid var(--c-rust);
  transform:rotate(45deg);
}
.compare-col:first-child .compare-list li::before{
  border-color:var(--c-weak);
  transform:none;width:8px;height:8px;border:0;background:var(--c-line-strong);top:11px;border-radius:1px;
}

/* ---------- Badge grid ---------- */
.badge-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}
.badge-item{
  border:1px solid var(--c-line);border-radius:6px;background:#fff;
  padding:22px 20px;transition:border-color .18s ease,background .18s ease,transform .18s ease,box-shadow .18s ease;
}
.badge-item:hover{border-color:var(--c-rust);background:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2);}
.badge-item .bi-num{
  font-family:var(--font-num);font-size:13px;letter-spacing:.14em;color:var(--c-rust);margin-bottom:12px;
}
.badge-item h4{font-size:16px;font-weight:700;color:var(--c-text);line-height:1.5;}
.badge-item p{margin-top:8px;font-size:13.5px;line-height:1.75;color:var(--c-muted);}

/* ---------- Flow / timeline ---------- */
.flow{position:relative;display:grid;grid-template-columns:1.15fr 1fr 1fr .85fr;gap:26px;padding-top:6px;}
.flow::before{
  content:"";position:absolute;left:0;right:0;top:24px;height:1px;background:var(--c-line-strong);
}
.flow-step{position:relative;padding-right:6px;}
.flow-dot{
  position:relative;z-index:2;width:36px;height:36px;border-radius:50%;
  background:var(--c-rust);color:#fff;display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-size:16px;font-weight:700;letter-spacing:.04em;
  box-shadow:0 0 0 5px var(--c-bg);
}
.flow-step h4{
  margin-top:20px;font-size:17px;font-weight:700;color:var(--c-text);line-height:1.5;
}
.flow-step p{margin-top:8px;font-size:14.5px;line-height:1.8;color:var(--c-muted);}
.flow-step .deliver{
  display:inline-block;margin-top:14px;font-size:12.5px;color:var(--c-steel);
  background:var(--c-steel-soft);border-radius:var(--radius-tag);padding:3px 10px;
}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;margin:0 auto;}
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:6px;
  margin-bottom:12px;overflow:hidden;transition:border-color .18s ease;
}
.faq-item[open]{border-color:var(--c-line-strong);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:56px;padding:12px 20px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:500;color:var(--c-text);line-height:1.6;
  position:relative;transition:color .18s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";font-family:var(--font-num);font-size:22px;font-weight:400;color:var(--c-rust);
  line-height:1;flex:none;transition:transform .2s ease;
}
.faq-item[open] summary{font-weight:700;color:var(--c-ink);}
.faq-item[open] summary::after{content:"−";}
.faq-item[open] summary::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--c-rust);
}
.faq-item summary:hover{color:var(--c-rust);}
.faq-answer{padding:0 20px 18px;font-size:15.5px;line-height:1.85;color:var(--c-muted);}
.faq-item[open] .faq-answer{animation:fadeIn .2s ease;}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px);}to{opacity:1;transform:translateY(0);}}

/* ---------- CTA block ---------- */
.cta-block{
  position:relative;background:var(--c-ink);color:var(--c-inverse);
  padding:84px 0;overflow:hidden;
}
.cta-block::before{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(45deg,rgba(255,255,255,.045) 0 1px,transparent 1px 14px);
  pointer-events:none;
}
.cta-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;
}
.cta-copy .kicker{
  display:flex;align-items:center;gap:10px;font-family:var(--font-num);
  font-size:13px;letter-spacing:.16em;color:#E8915C;margin-bottom:16px;
}
.cta-copy .kicker::before{content:"";width:22px;height:2px;background:var(--c-rust);}
.cta-copy h2{font-size:30px;line-height:1.35;font-weight:700;color:#fff;letter-spacing:-.2px;}
.cta-copy p{margin-top:16px;font-size:16px;line-height:1.85;color:rgba(237,239,241,.78);max-width:32em;}
.contact-rows{margin-top:32px;border-top:1px solid rgba(255,255,255,.12);}
.contact-rows .cr{
  display:flex;justify-content:space-between;gap:18px;align-items:baseline;
  padding:14px 0;border-bottom:1px solid rgba(255,255,255,.12);
}
.contact-rows .cr dt{font-size:14px;color:rgba(237,239,241,.6);}
.contact-rows .cr dd{font-size:15px;color:#fff;font-weight:500;text-align:right;}
.contact-rows .cr dd.tel{font-family:var(--font-num);font-size:20px;letter-spacing:.04em;color:#E8915C;}

.form-card{
  background:#fff;border-radius:var(--radius-card);padding:30px 30px 28px;
  color:var(--c-body);box-shadow:0 18px 40px rgba(0,0,0,.22);
}
.form-card h3{font-size:19px;font-weight:700;color:var(--c-text);line-height:1.5;}
.form-card .fhint{margin-top:8px;font-size:13.5px;color:var(--c-muted);line-height:1.7;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:22px;}
.field{display:flex;flex-direction:column;gap:7px;}
.field.full{grid-column:1 / -1;}
.field label{font-size:13px;color:var(--c-muted);font-weight:500;}
.field label .req{color:#B42318;margin-left:2px;}
.field input,.field select,.field textarea{
  width:100%;height:44px;padding:0 13px;border:1px solid #D8D3CA;border-radius:6px;
  background:#fff;font-size:14.5px;color:var(--c-text);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{height:96px;padding:11px 13px;resize:vertical;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-rust);box-shadow:0 0 0 3px rgba(184,74,24,.12);
}
.field input::placeholder,.field textarea::placeholder{color:var(--c-weak);}
.form-card .btn{width:100%;margin-top:20px;}
.form-note{margin-top:12px;font-size:12.5px;color:var(--c-weak);line-height:1.7;}
.form-msg{
  display:none;margin-top:14px;padding:11px 14px;border-radius:6px;
  background:#EAF4EF;color:var(--c-ok);font-size:13.5px;border:1px solid #C9E3D6;
}
.form-msg.show{display:block;}

/* ---------- Footer ---------- */
.site-footer{background:var(--c-ink);color:var(--c-inverse);padding:72px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:48px;}
.footer-brand .logo{margin-bottom:18px;}
.footer-brand .logo-text{color:#fff;}
.footer-brand p{font-size:14px;line-height:1.85;color:#C9CFD5;max-width:32em;}
.qr{
  margin-top:20px;width:96px;height:96px;border:1px solid rgba(255,255,255,.18);
  border-radius:6px;display:flex;align-items:center;justify-content:center;
  font-size:12px;color:rgba(237,239,241,.5);text-align:center;line-height:1.6;
  background-image:repeating-linear-gradient(45deg,rgba(255,255,255,.05) 0 1px,transparent 1px 8px);
}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:18px;letter-spacing:.02em;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul li a{font-size:14px;color:#C9CFD5;line-height:1.7;}
.footer-col ul li a:hover{color:#E8915C;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px;}
.footer-contact li{font-size:14px;color:#C9CFD5;line-height:1.8;margin-bottom:10px;}
.footer-contact li strong{color:#fff;font-family:var(--font-num);font-size:19px;letter-spacing:.04em;font-weight:700;}
.footer-bottom{
  margin-top:48px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(237,239,241,.5);line-height:1.7;
}

/* ---------- Responsive ---------- */
@media (max-width:1180px){
  .mega{width:720px;right:-40px;}
  .mega-grid{grid-template-columns:1fr 1fr;gap:22px;}
  .mega-grid > div:last-child{display:none;}
}
@media (max-width:1024px){
  .main-nav > ul > li > a{padding:0 10px;font-size:14.5px;}
  .head-actions .nav-cta{padding:0 14px;font-size:14px;}
  .page-hero h1{font-size:34px;}
  .section{padding:72px 0;}
  .badge-grid{grid-template-columns:repeat(2,1fr);}
  .compare{grid-template-columns:1fr;}
  .compare-col + .compare-col{border-left:0;border-top:1px solid var(--c-line);}
  .flow{grid-template-columns:1fr 1fr;gap:32px 26px;}
  .flow::before{display:none;}
  .cta-grid{grid-template-columns:1fr;gap:36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px;}
  .float-card{position:static;width:auto;margin:0 20px 20px;box-shadow:var(--shadow-1);}
  .figure-wrap::after{background:linear-gradient(180deg,rgba(20,23,27,.78) 0%,rgba(20,23,27,.42) 55%,rgba(20,23,27,.72) 100%);}
  .figure-caption{position:static;padding:28px 24px 4px;max-width:none;}
  .figure-wrap img{aspect-ratio:16/9;}
}
@media (max-width:768px){
  :root{--pad:18px;}
  .header-inner{height:64px;gap:12px;}
  .logo-text{font-size:17px;}
  .logo-mark{width:23px;height:23px;}
  .nav-toggle{display:block;}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;width:86%;max-width:360px;
    background:#fff;border-left:1px solid var(--c-line);
    padding:76px 20px 90px;overflow-y:auto;
    transform:translateX(100%);transition:transform .24s ease;
    box-shadow:-8px 0 30px rgba(20,23,27,.14);z-index:140;
  }
  .main-nav.is-open{transform:translateX(0);}
  .main-nav > ul{flex-direction:column;align-items:stretch;gap:0;}
  .main-nav > ul > li{border-bottom:1px solid var(--c-line);}
  .main-nav > ul > li > a{height:52px;padding:0 4px;font-size:15.5px;}
  .main-nav > ul > li > a::after{display:none;}
  .main-nav > ul > li > a.is-active{color:var(--c-rust);}
  .has-mega > a::before{display:none;}
  .mega{
    position:static;width:auto;opacity:1;visibility:visible;transform:none;
    border:0;border-top:1px dashed var(--c-line);border-radius:0;box-shadow:none;
    padding:12px 0 16px;background:#fff;
  }
  .mega-grid{grid-template-columns:1fr;gap:16px;}
  .mega-grid > div:last-child{display:block;}
  .mega-card img{aspect-ratio:16/9;}
  .mega-foot{display:none;}
  .head-actions .nav-cta{display:none;}
  .page-hero{padding:18px 0 32px;}
  .page-hero h1{font-size:30px;line-height:1.3;}
  .page-hero .lead{font-size:16.5px;}
  .sec-head h2{font-size:24px;}
  .section{padding:56px 0;}
  .flow{grid-template-columns:1fr;gap:26px;}
  .badge-grid{grid-template-columns:1fr 1fr;gap:12px;}
  .form-grid{grid-template-columns:1fr;}
  .form-card{padding:24px 20px;}
  .cta-block{padding:60px 0;}
  .cta-copy h2{font-size:24px;}
  .footer-grid{grid-template-columns:1fr;gap:34px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .compare-col{padding:26px 22px;}
  .figure-caption h3{font-size:21px;}
}
@media (max-width:560px){
  body{font-size:16px;line-height:1.8;}
  .page-hero h1{font-size:26px;}
  .btn{width:100%;}
  .hero-meta{gap:8px;}
  .chip{height:30px;padding:0 11px;font-size:12px;}
  .badge-grid{grid-template-columns:1fr;}
  .float-card{margin:0 14px 14px;padding:20px;}
  .float-card dd{font-size:17px;}
  .contact-rows .cr{flex-direction:column;gap:4px;align-items:flex-start;}
  .contact-rows .cr dd{text-align:left;}
  .faq-item summary{font-size:15px;padding:12px 16px;gap:12px;}
  .faq-answer{padding:0 16px 16px;font-size:15px;}
}

/* roulang page: category5 */
:root{
  --c-ink:#20242A;
  --c-ink-deep:#14171B;
  --c-rust:#B84A18;
  --c-rust-deep:#9C3D13;
  --c-rust-soft:#FBEFE8;
  --c-steel:#2F5D62;
  --c-steel-soft:#E7EEEE;
  --c-bg:#F6F4F0;
  --c-card:#FFFFFF;
  --c-soft:#EDEAE4;
  --c-text:#1C2025;
  --c-body:#333A41;
  --c-muted:#5E6670;
  --c-faint:#8A9099;
  --c-line:#E1DDD5;
  --c-line-strong:#D6D0C6;
  --c-inverse:#EDEFF1;
  --r-card:8px;
  --r-btn:6px;
  --r-input:6px;
  --r-tag:4px;
  --sh-1:0 1px 2px rgba(32,36,42,.05);
  --sh-2:0 10px 24px rgba(32,36,42,.10);
  --container:1200px;
  --gap:24px;
  --sec-y:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--c-body);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--c-text);font-weight:700;line-height:1.35}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
::selection{background:var(--c-rust);color:#fff}
:focus-visible{outline:2px solid var(--c-rust);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.num{font-family:"Barlow Condensed","Inter","PingFang SC",sans-serif;font-variant-numeric:tabular-nums;font-weight:700;letter-spacing:.01em}

/* ============ 按钮 ============ */
.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:500;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-primary{background:var(--c-ink);color:var(--c-inverse);border-color:var(--c-ink)}
.btn-primary:hover{background:var(--c-ink-deep);border-color:var(--c-ink-deep)}
.btn-primary .arw{color:#F0A57C}
.btn-rust{background:var(--c-rust);color:#fff;border-color:var(--c-rust)}
.btn-rust:hover{background:var(--c-rust-deep);border-color:var(--c-rust-deep)}
.btn-ghost{background:#fff;color:var(--c-text);border-color:var(--c-line-strong)}
.btn-ghost:hover{border-color:var(--c-rust);color:var(--c-rust)}
.btn:active{transform:translateY(1px)}
.btn[disabled],.btn.is-disabled{background:#E8E5DF;color:#A8AEB4;border-color:#E8E5DF;cursor:not-allowed;transform:none}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:#fff;border-bottom:1px solid var(--c-line);
  transition:box-shadow .2s ease;
}
.site-header.is-stuck{box-shadow:0 2px 10px rgba(0,0,0,.06)}
.header-inner{display:flex;align-items:center;gap:20px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:26px;height:26px;border-radius:5px;flex:0 0 auto;
  background:
    linear-gradient(135deg,var(--c-rust) 0%,var(--c-rust) 46%,var(--c-ink) 46%,var(--c-ink) 100%);
  position:relative;
}
.logo-mark::after{
  content:"";position:absolute;inset:7px;border:1.5px solid rgba(255,255,255,.78);border-radius:2px;
}
.logo-text{font-size:18px;font-weight:700;color:var(--c-text);letter-spacing:.02em;white-space:nowrap}
.logo-text em{font-style:normal;color:var(--c-rust);margin-left:2px}

.main-nav{margin-left:auto}
.main-nav>ul{display:flex;align-items:center;gap:2px}
.main-nav>ul>li{position:relative}
.main-nav>ul>li>a{
  display:flex;align-items:center;height:68px;padding:0 14px;
  font-size:15px;font-weight:500;color:var(--c-text);white-space:nowrap;
  transition:color .16s ease;
}
.main-nav>ul>li>a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:3px;
  background:var(--c-rust);transform:scaleX(0);transform-origin:left;transition:transform .18s ease;
}
.main-nav>ul>li>a:hover{color:var(--c-rust)}
.main-nav>ul>li>a:hover::after,
.main-nav>ul>li>a.is-active::after{transform:scaleX(1)}
.main-nav>ul>li>a.is-active{color:var(--c-rust)}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

/* Mega 面板 */
.mega{
  position:absolute;top:100%;right:0;width:820px;
  background:#fff;border:1px solid var(--c-line);border-top:2px solid var(--c-rust);
  border-radius:0 0 var(--r-card) var(--r-card);
  box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;transform:translateY(4px);
  transition:opacity .16s ease,transform .16s ease,visibility .16s ease;
  z-index:90;
}
.has-mega:hover .mega,
.has-mega:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0)}
.mega-grid{display:grid;grid-template-columns:1.15fr 1fr .92fr;gap:28px;padding:26px 28px 20px}
.mega-col-title{font-size:12.5px;font-weight:700;color:var(--c-faint);letter-spacing:.14em;margin-bottom:12px}
.mega-links{display:grid;grid-template-columns:1fr;gap:2px}
.mega-links a{
  display:flex;align-items:center;gap:8px;min-height:34px;padding:2px 6px 2px 0;
  font-size:14px;color:var(--c-body);border-radius:4px;transition:color .14s ease,background .14s ease;
}
.mega-links a i{width:10px;height:10px;background:var(--c-rust);border-radius:2px;flex:0 0 auto}
.mega-links a:hover{color:var(--c-rust);background:var(--c-rust-soft)}
.mega-posts{display:grid;gap:10px}
.mega-posts a{display:block;padding:8px 10px;border:1px solid var(--c-line);border-radius:6px;transition:border-color .16s ease,background .16s ease}
.mega-posts a:hover{border-color:var(--c-line-strong);background:#FBFAF8}
.mega-posts .mt{display:block;font-size:14px;font-weight:500;color:var(--c-text);line-height:1.5}
.mega-posts .md{display:block;font-size:12.5px;color:var(--c-faint);margin-top:2px}
.mega-card{border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;display:block;transition:border-color .16s ease,box-shadow .16s ease}
.mega-card:hover{border-color:var(--c-line-strong);box-shadow:var(--sh-2)}
.mega-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.mega-card span{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 12px;font-size:13.5px;font-weight:500;color:var(--c-text)}
.mega-card:hover span{color:var(--c-rust)}
.mega-foot{
  display:flex;flex-wrap:wrap;align-items:center;gap:20px;
  padding:12px 28px;background:var(--c-soft);border-top:1px solid var(--c-line);
  border-radius:0 0 var(--r-card) var(--r-card);font-size:13px;color:var(--c-muted);
}
.mega-foot strong{color:var(--c-ink);font-family:"Barlow Condensed","Inter",sans-serif;font-size:16px;letter-spacing:.02em}
.mega-foot a{color:var(--c-rust);font-weight:500}
.mega-foot a:hover{text-decoration:underline;text-underline-offset:3px}

.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border:1px solid var(--c-line-strong);border-radius:6px;background:#fff;cursor:pointer;
}
.nav-toggle span{position:relative;display:block;width:18px;height:2px;background:var(--c-ink);transition:background .16s ease}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-ink);transition:transform .2s ease}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
body.nav-open .nav-toggle span{background:transparent}
body.nav-open .nav-toggle span::before{transform:translateY(6px) rotate(45deg)}
body.nav-open .nav-toggle span::after{transform:translateY(-6px) rotate(-45deg)}
.nav-mask{display:none;position:fixed;inset:0;background:rgba(20,23,27,.5);z-index:70;opacity:0;transition:opacity .2s ease}
body.nav-open .nav-mask{display:block;opacity:1}

/* ============ 分类 Hero ============ */
.page-hero{position:relative;background:var(--c-ink);color:var(--c-inverse);overflow:hidden}
.page-hero-bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:.55;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(96deg,rgba(20,23,27,.92) 0%,rgba(20,23,27,.74) 46%,rgba(20,23,27,.34) 100%);
}
.page-hero-inner{position:relative;z-index:2;padding:72px 0 60px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.16em;font-weight:700;color:#F0A57C;
  text-transform:uppercase;margin-bottom:16px;
}
.eyebrow .dot{width:8px;height:8px;background:var(--c-rust);border-radius:2px;display:inline-block}
.page-hero h1{
  color:#fff;font-size:42px;line-height:1.25;max-width:760px;letter-spacing:.01em;
}
.page-hero .lead{
  margin-top:18px;max-width:640px;font-size:18px;line-height:1.7;color:#D9DDE1;
}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:0;margin-top:34px;
  border-top:1px solid rgba(255,255,255,.14);padding-top:22px;
}
.hero-facts div{
  padding-right:38px;margin-right:38px;border-right:1px solid rgba(255,255,255,.14);
}
.hero-facts div:last-child{border-right:0;margin-right:0;padding-right:0}
.hero-facts b{display:block;font-size:26px;line-height:1.2;color:#fff;font-family:"Barlow Condensed","Inter",sans-serif;font-variant-numeric:tabular-nums}
.hero-facts span{display:block;font-size:13px;color:#A9B1B8;margin-top:4px}

/* ============ 通用板块 ============ */
.section{padding:var(--sec-y) 0}
.section-tight{padding:64px 0}
.section-alt{background:var(--c-soft)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:36px}
.sec-title{position:relative;padding-left:16px}
.sec-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:2px;background:var(--c-rust)}
.sec-title .idx{
  display:block;font-family:"Barlow Condensed","Inter",sans-serif;
  font-size:13px;font-weight:700;letter-spacing:.18em;color:var(--c-rust);margin-bottom:6px;
}
.sec-title h2{font-size:30px;line-height:1.35;max-width:640px}
.sec-title p{margin-top:10px;font-size:15px;color:var(--c-muted);max-width:640px}
.sec-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--c-rust);white-space:nowrap}
.sec-link:hover{color:var(--c-rust-deep);text-decoration:underline;text-underline-offset:4px}

/* ============ 筛选条 ============ */
.filter-bar{
  display:flex;flex-wrap:wrap;gap:10px;padding:18px 0 0;
}
.chip{
  display:inline-flex;align-items:center;height:38px;padding:0 16px;
  border:1px solid var(--c-line-strong);border-radius:var(--r-tag);
  background:#fff;font-size:14px;color:var(--c-body);cursor:pointer;
  transition:border-color .16s ease,color .16s ease,background .16s ease;
}
.chip:hover{border-color:var(--c-rust);color:var(--c-rust)}
.chip.is-on{background:var(--c-ink);border-color:var(--c-ink);color:#fff}
.chip.is-on:hover{background:var(--c-ink-deep);color:#fff;border-color:var(--c-ink-deep)}

/* ============ 案例网格 ============ */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);margin-top:28px}
.case-card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  box-shadow:var(--sh-1);
  transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.case-card:hover{border-color:var(--c-line-strong);box-shadow:var(--sh-2);transform:translateY(-2px)}
.case-card:hover .case-title{color:var(--c-rust)}
.case-media{overflow:hidden;background:var(--c-ink)}
.case-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .3s ease}
.case-card:hover .case-media img{transform:scale(1.03)}
.case-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 9px;border-radius:var(--r-tag);
  background:var(--c-steel-soft);color:var(--c-steel);
  font-size:12.5px;font-weight:500;letter-spacing:.02em;
}
.tag-rust{background:var(--c-rust-soft);color:var(--c-rust)}
.case-title{font-size:19px;line-height:1.5;font-weight:500;color:var(--c-text);transition:color .16s ease}
.case-desc{font-size:14px;line-height:1.8;color:var(--c-muted)}
.case-meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:6px 18px;font-size:12.5px;color:var(--c-faint);
}
.case-meta b{color:var(--c-text);font-weight:700;font-family:"Barlow Condensed","Inter",sans-serif;font-size:15px;letter-spacing:.01em}
.case-card.is-feature{
  grid-column:span 2;display:grid;grid-template-columns:1.06fr .94fr;
}
.case-card.is-feature .case-media{height:100%}
.case-card.is-feature .case-media img{height:100%;aspect-ratio:auto;min-height:300px}
.case-card.is-feature .case-body{padding:28px 30px;justify-content:center}
.case-card.is-feature .case-title{font-size:24px}
.case-card.is-feature .case-desc{font-size:14.5px}
.big-num{
  display:flex;flex-wrap:wrap;gap:26px;margin-top:4px;
}
.big-num div b{
  display:block;font-size:32px;line-height:1.1;color:var(--c-rust);
  font-family:"Barlow Condensed","Inter",sans-serif;font-variant-numeric:tabular-nums;
}
.big-num div span{display:block;font-size:12.5px;color:var(--c-muted);margin-top:4px}

/* ============ 数据条 ============ */
.stat-strip{
  background:var(--c-ink);color:var(--c-inverse);
  background-image:repeating-linear-gradient(45deg,rgba(255,255,255,.04) 0 2px,transparent 2px 12px);
}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat-item{padding:34px 28px;border-right:1px solid rgba(255,255,255,.12)}
.stat-item:last-child{border-right:0}
.stat-item b{
  display:block;font-size:38px;line-height:1.1;color:#fff;
  font-family:"Barlow Condensed","Inter",sans-serif;font-variant-numeric:tabular-nums;letter-spacing:.01em;
}
.stat-item b em{font-style:normal;font-size:19px;color:#F0A57C;margin-left:4px}
.stat-item span{display:block;margin-top:8px;font-size:13.5px;color:#A9B1B8;line-height:1.7}

/* ============ 客户评价 ============ */
.quote-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--gap)}
.quote{
  position:relative;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:32px 30px 26px;box-shadow:var(--sh-1);
}
.quote::before{
  content:"”";position:absolute;top:6px;left:22px;
  font-family:Georgia,serif;font-size:64px;line-height:1;color:var(--c-rust);opacity:.22;
}
.quote p{position:relative;font-size:15.5px;line-height:1.9;color:var(--c-body)}
.quote footer{
  margin-top:18px;padding-top:14px;border-top:1px solid var(--c-line);
  display:flex;align-items:center;gap:10px;font-size:13px;color:var(--c-faint);
}
.quote footer strong{color:var(--c-text);font-weight:500;font-size:13.5px}
.quote footer i{width:6px;height:6px;border-radius:2px;background:var(--c-rust);display:inline-block}

/* ============ FAQ ============ */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-list{display:grid;gap:12px}
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:6px;overflow:hidden;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.faq-item.is-open{border-color:var(--c-line-strong);box-shadow:var(--sh-1)}
.faq-item.is-open{border-left:3px solid var(--c-rust)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:56px;padding:14px 20px;background:transparent;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:400;color:var(--c-text);line-height:1.6;
  transition:color .16s ease,font-weight .16s ease;
}
.faq-q:hover{color:var(--c-rust)}
.faq-item.is-open .faq-q{font-weight:500}
.faq-ico{
  position:relative;flex:0 0 auto;width:18px;height:18px;border-radius:3px;
  border:1px solid var(--c-line-strong);
}
.faq-ico::before,.faq-ico::after{
  content:"";position:absolute;background:var(--c-rust);opacity:.9;
}
.faq-ico::before{left:4px;right:4px;top:8px;height:1.5px}
.faq-ico::after{top:4px;bottom:4px;left:8px;width:1.5px;transition:transform .2s ease,opacity .2s ease}
.faq-item.is-open .faq-ico::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease}
.faq-a-inner{padding:0 20px 18px;font-size:15.5px;line-height:1.85;color:var(--c-muted)}

/* ============ CTA / 表单 ============ */
.cta-band{
  background:var(--c-ink);color:var(--c-inverse);position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(45deg,rgba(255,255,255,.035) 0 2px,transparent 2px 14px);
  pointer-events:none;
}
.cta-inner{position:relative;display:grid;grid-template-columns:1fr 1.05fr;gap:56px;padding:80px 0;align-items:start}
.cta-copy h2{color:#fff;font-size:30px;line-height:1.35}
.cta-copy p{margin-top:16px;font-size:15.5px;line-height:1.85;color:#C4CAD0;max-width:420px}
.cta-points{margin-top:26px;display:grid;gap:12px}
.cta-points li{display:flex;gap:10px;font-size:14px;color:#D5DADE;line-height:1.7}
.cta-points li::before{content:"";flex:0 0 auto;width:8px;height:8px;margin-top:8px;background:var(--c-rust);border-radius:2px}
.cta-contact{margin-top:30px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);display:grid;gap:8px;font-size:13.5px;color:#A9B1B8}
.cta-contact strong{color:#fff;font-size:20px;font-family:"Barlow Condensed","Inter",sans-serif;letter-spacing:.03em}

.lead-form{background:#fff;border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-2)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;color:var(--c-muted)}
.field label .req{color:#B42318;margin-left:3px}
.field input,.field select,.field textarea{
  width:100%;height:44px;padding:0 12px;
  background:#fff;border:1px solid #D8D3CA;border-radius:var(--r-input);
  font-size:14.5px;color:var(--c-text);
  transition:border-color .16s ease,box-shadow .16s ease;
}
.field textarea{height:96px;padding:10px 12px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-rust);box-shadow:0 0 0 2px rgba(184,74,24,.16);
}
.field input::placeholder,.field textarea::placeholder{color:#A8AEB4}
.form-note{font-size:12.5px;color:var(--c-faint);line-height:1.7}
.form-actions{grid-column:1/-1;display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:4px}
.form-actions .btn{min-width:160px}
.form-msg{
  grid-column:1/-1;display:none;padding:12px 14px;border-radius:6px;
  font-size:13.5px;line-height:1.7;
}
.form-msg.ok{display:block;background:#EAF5EF;color:#2E7D5B;border:1px solid #CBE6D8}
.form-msg.err{display:block;background:#FDEDEC;color:#B42318;border:1px solid #F5C9C5}

/* ============ 页脚 ============ */
.site-footer{background:var(--c-ink);color:var(--c-inverse);padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.45fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:44px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand .logo-text{color:#fff}
.footer-brand .logo-text em{color:#F0A57C}
.footer-brand p{font-size:13.5px;line-height:1.85;color:#A9B1B8;max-width:340px}
.qr{
  margin-top:18px;width:88px;height:88px;border:1px solid rgba(255,255,255,.18);border-radius:6px;
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:11.5px;line-height:1.5;color:#8A9099;
  background:repeating-linear-gradient(45deg,rgba(255,255,255,.04) 0 3px,transparent 3px 9px);
}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-col ul{display:grid;gap:9px}
.footer-col a{font-size:14px;color:#C9CFD5;transition:color .16s ease}
.footer-col a:hover{color:#F0A57C;text-decoration:underline;text-underline-offset:4px}
.footer-contact li{font-size:13.5px;color:#A9B1B8;line-height:1.75}
.footer-contact strong{
  color:#fff;font-size:19px;font-family:"Barlow Condensed","Inter",sans-serif;letter-spacing:.03em;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  padding:18px 0 22px;font-size:12.5px;color:#8A9099;
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  :root{--sec-y:72px}
  .header-inner{gap:14px}
  .main-nav>ul>li>a{padding:0 10px;font-size:14px}
  .main-nav>ul>li>a::after{left:10px;right:10px}
  .mega{width:700px}
  .mega-grid{grid-template-columns:1fr 1fr;gap:22px}
  .mega-grid>div:last-child{display:none}
  .page-hero h1{font-size:34px}
  .case-grid{grid-template-columns:1fr 1fr}
  .case-card.is-feature{grid-column:span 2;grid-template-columns:1fr}
  .case-card.is-feature .case-media img{min-height:240px;aspect-ratio:16/9}
  .stat-grid{grid-template-columns:1fr 1fr}
  .stat-item{border-right:0;border-bottom:1px solid rgba(255,255,255,.12)}
  .stat-item:nth-child(2n){border-right:0}
  .stat-item:nth-child(odd){border-right:1px solid rgba(255,255,255,.12)}
  .quote-grid{grid-template-columns:1fr}
  .cta-inner{grid-template-columns:1fr;gap:36px;padding:64px 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  :root{--sec-y:56px;--gap:16px}
  body{font-size:16px;line-height:1.8}
  .container{padding:0 18px}
  .nav-toggle{display:inline-flex}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;width:86%;max-width:360px;
    background:#fff;margin:0;padding:80px 20px 96px;
    transform:translateX(100%);transition:transform .24s ease;
    overflow-y:auto;z-index:75;box-shadow:-8px 0 28px rgba(20,23,27,.16);
  }
  body.nav-open .main-nav{transform:translateX(0)}
  .main-nav>ul{display:grid;gap:0}
  .main-nav>ul>li{border-bottom:1px solid var(--c-line)}
  .main-nav>ul>li>a{height:52px;padding:0;font-size:15.5px}
  .main-nav>ul>li>a::after{display:none}
  .main-nav>ul>li>a.is-active{color:var(--c-rust)}
  .mega{
    position:static;width:auto;opacity:1;visibility:visible;transform:none;
    box-shadow:none;border:0;border-top:0;border-radius:0;display:none;
  }
  .has-mega.is-open .mega{display:block}
  .mega-grid{grid-template-columns:1fr;padding:8px 0 16px;gap:16px}
  .mega-grid>div:last-child{display:block}
  .mega-foot{border-radius:0;padding:12px 0;background:transparent;border-top:1px dashed var(--c-line)}
  .header-actions .btn-sm{display:none}
  .page-hero-inner{padding:52px 0 44px}
  .page-hero h1{font-size:30px;line-height:1.3}
  .page-hero .lead{font-size:16px}
  .hero-facts{margin-top:26px;padding-top:18px}
  .hero-facts div{padding-right:22px;margin-right:22px}
  .hero-facts b{font-size:22px}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px}
  .sec-title h2{font-size:24px}
  .case-grid{grid-template-columns:1fr}
  .case-card.is-feature{grid-column:span 1}
  .case-card.is-feature .case-body{padding:22px}
  .case-card.is-feature .case-title{font-size:20px}
  .stat-grid{grid-template-columns:1fr 1fr}
  .stat-item{padding:24px 18px}
  .stat-item b{font-size:30px}
  .form-grid{grid-template-columns:1fr}
  .lead-form{padding:22px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-brand p{max-width:none}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px}
  .quote{padding:26px 22px 22px}
}
@media (max-width:560px){
  .page-hero h1{font-size:26px}
  .hero-facts{flex-wrap:wrap;gap:16px}
  .hero-facts div{border-right:0;padding-right:0;margin-right:0;width:calc(50% - 8px)}
  .stat-grid{grid-template-columns:1fr}
  .stat-item{border-right:0!important;border-bottom:1px solid rgba(255,255,255,.12)}
  .btn{width:100%}
  .header-actions .btn{width:auto}
  .filter-bar{gap:8px}
  .chip{height:36px;padding:0 12px;font-size:13px}
  .case-body{padding:18px}
  .form-actions .btn{width:100%}
}