/* roulang page: index */
:root{
  --c-primary:#FF5A1E;
  --c-primary-dark:#DC430C;
  --c-accent:#12D6A0;
  --c-ink:#14171A;
  --c-ink-2:#2A2F36;
  --c-dark:#101318;
  --c-dark-2:#1B2027;
  --c-bg:#F7F6F3;
  --c-surface:#FFFFFF;
  --c-surface-2:#EFEDE8;
  --c-line:#E3E0DA;
  --c-muted:#6E7580;
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,19,24,.04), 0 12px 32px -12px rgba(16,19,24,.14);
  --sh-2:0 22px 48px -18px rgba(16,19,24,.22);
  --container:1240px;
  --nav-h:72px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",Arial,sans-serif;
  font-size:17px;
  line-height:1.9;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease,opacity .2s ease;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:750;letter-spacing:-.01em;}
p{margin:0 0 1.15em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}
.section{padding:104px 0;}
.section--tight{padding:80px 0;}
.section--light{background:var(--c-bg);}
.section--surface{background:var(--c-surface);}
.section--dark{background:var(--c-dark);color:#fff;}
.section--dark h2,.section--dark h3{color:#fff;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:650;letter-spacing:.06em;
  color:var(--c-primary);text-transform:uppercase;
  background:rgba(255,90,30,.08);
  border:1px solid rgba(255,90,30,.22);
  padding:6px 14px;border-radius:var(--r-pill);margin-bottom:20px;
}
.section--dark .eyebrow{background:rgba(255,90,30,.14);border-color:rgba(255,90,30,.4);}
.sec-head{max-width:760px;margin-bottom:52px;}
.sec-head h2{font-size:clamp(26px,3.4vw,40px);font-weight:750;margin-bottom:16px;}
.sec-head p{font-size:16.5px;color:var(--c-muted);line-height:1.85;}
.section--dark .sec-head p{color:#B4BAC4;}
.lead-num{
  font-size:clamp(34px,4vw,54px);font-weight:800;line-height:1;
  color:transparent;-webkit-text-stroke:1.5px rgba(255,90,30,.55);
  font-variant-numeric:tabular-nums;letter-spacing:.02em;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  min-height:48px;padding:0 26px;border-radius:var(--r-pill);
  font-size:16px;font-weight:700;line-height:1;border:1px solid transparent;
  cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn i{font-size:14px;}
.btn-primary,.button.btn-primary{background:var(--c-primary);color:#fff;border-color:var(--c-primary);}
.btn-primary:hover,.button.btn-primary:hover{background:var(--c-primary-dark);border-color:var(--c-primary-dark);transform:translateY(-2px);box-shadow:0 18px 34px -16px rgba(255,90,30,.75);color:#fff;}
.btn-outline{background:transparent;color:var(--c-ink);border-color:rgba(20,23,26,.28);}
.btn-outline:hover{background:var(--c-ink);color:#fff;border-color:var(--c-ink);transform:translateY(-2px);}
.btn-ghost-light{background:rgba(255,255,255,.06);color:#fff;border-color:rgba(255,255,255,.28);}
.btn-ghost-light:hover{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.5);transform:translateY(-2px);}
.btn-sm{min-height:44px;font-size:15px;padding:0 22px;}
.btn-block{width:100%;}
.btn-white{background:#fff;color:var(--c-ink);border-color:#fff;}
.btn-white:hover{background:var(--c-surface-2);color:var(--c-ink);transform:translateY(-2px);}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:var(--nav-h);display:flex;align-items:center;
  color:#fff;
  background:linear-gradient(180deg,rgba(16,19,24,.55),rgba(16,19,24,.12));
  border-bottom:1px solid rgba(255,255,255,.08);
  transition:background-color .25s ease,box-shadow .25s ease,border-color .25s ease,color .25s ease;
}
.site-header.is-scrolled{
  background:rgba(247,246,243,.96);
  color:var(--c-ink);
  border-bottom:1px solid var(--c-line);
  box-shadow:0 10px 28px -18px rgba(16,19,24,.34);
}
.nav-inner{display:flex;align-items:center;gap:28px;width:100%;}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(135deg,var(--c-primary),#FF8A4C);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 22px -12px rgba(255,90,30,.9);
}
.brand-mark span{font-size:20px;font-weight:800;color:#fff;line-height:1;font-variant-numeric:tabular-nums;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:17px;font-weight:750;letter-spacing:.01em;}
.brand-sub{font-size:11px;letter-spacing:.14em;opacity:.6;font-weight:600;}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-link{
  position:relative;font-size:15px;font-weight:600;padding:6px 0;
  color:inherit;opacity:.86;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--c-primary);transition:width .22s ease;
}
.nav-link:hover{opacity:1;color:var(--c-primary);}
.nav-link:hover::after{width:100%;}
.nav-link.is-active{opacity:1;color:var(--c-primary);}
.nav-link.is-active::after{width:100%;}
.nav-link--pill{
  border:1px solid rgba(255,255,255,.45);border-radius:var(--r-pill);
  padding:8px 18px;font-size:14.5px;
}
.site-header.is-scrolled .nav-link--pill{border-color:rgba(20,23,26,.24);}
.nav-link--pill::after{display:none;}
.nav-link--pill:hover{border-color:var(--c-primary);}
.nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid rgba(255,255,255,.35);background:transparent;color:inherit;
  align-items:center;justify-content:center;cursor:pointer;
}
.site-header.is-scrolled .nav-toggle{border-color:rgba(20,23,26,.2);}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:86%;max-width:400px;z-index:1200;
  background:var(--c-dark);color:#fff;padding:24px;
  transform:translateX(102%);transition:transform .3s ease;
  display:flex;flex-direction:column;gap:8px;
}
.drawer.is-open{transform:translateX(0);}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid rgba(255,255,255,.24);
  background:transparent;color:#fff;cursor:pointer;font-size:16px;
}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;padding:0 4px;border-bottom:1px solid rgba(255,255,255,.09);
  font-size:16px;font-weight:600;
}
.drawer-link:hover{color:var(--c-primary);}
.drawer-bottom{margin-top:auto;display:flex;flex-direction:column;gap:12px;}
.drawer-mask{
  position:fixed;inset:0;background:rgba(16,19,24,.55);z-index:1100;
  opacity:0;visibility:hidden;transition:opacity .3s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ---------- hero ---------- */
.hero{
  position:relative;color:#fff;padding:calc(var(--nav-h) + 96px) 0 84px;
  background-color:#101318;
  background-image:linear-gradient(115deg,rgba(16,19,24,.92) 0%,rgba(16,19,24,.78) 46%,rgba(16,19,24,.58) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.08;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:64px 64px;
}
.hero .container{position:relative;z-index:2;}
.hero-badge{
  display:inline-flex;align-items:center;gap:10px;
  padding:7px 16px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);
  font-size:13px;font-weight:650;letter-spacing:.02em;margin-bottom:26px;
}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--c-accent);box-shadow:0 0 0 4px rgba(18,214,160,.2);}
.hero h1{
  font-size:clamp(32px,5vw,56px);font-weight:800;line-height:1.15;
  max-width:15em;margin-bottom:22px;
}
.hero h1 em{font-style:normal;color:var(--c-primary);}
.hero-sub{font-size:17.5px;line-height:1.85;color:#C9CFD8;max-width:620px;margin-bottom:34px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:56px;}
.hero-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid rgba(255,255,255,.16);
  padding-top:30px;max-width:900px;
}
.hero-stat{padding-right:22px;border-right:1px solid rgba(255,255,255,.14);}
.hero-stat:last-child{border-right:none;}
.hero-stat b{
  display:block;font-size:clamp(30px,3.6vw,48px);font-weight:800;line-height:1.05;
  color:#fff;font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.hero-stat b span{font-size:.5em;color:var(--c-primary);margin-left:4px;font-weight:700;}
.hero-stat small{display:block;margin-top:8px;font-size:12.5px;color:#98A0AC;letter-spacing:.04em;font-weight:600;}
.scroll-hint{
  position:absolute;right:36px;bottom:34px;z-index:3;
  display:flex;flex-direction:column;align-items:center;gap:10px;
  font-size:11px;letter-spacing:.24em;color:rgba(255,255,255,.55);
}
.scroll-hint i{animation:hintFloat 1.5s ease-in-out infinite;font-size:14px;}
@keyframes hintFloat{0%,100%{transform:translateY(-3px);opacity:.5;}50%{transform:translateY(4px);opacity:1;}}

/* ---------- sell ---------- */
.sell-list{display:flex;flex-direction:column;}
.sell-row{
  display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center;
  padding:52px 0;border-bottom:1px solid var(--c-line);
}
.sell-row:nth-child(2){grid-template-columns:7fr 5fr;}
.sell-row:first-child{padding-top:0;}
.sell-row:last-child{border-bottom:none;padding-bottom:0;}
.sell-row:nth-child(2) .sell-media{order:-1;}
.sell-media{border-radius:var(--r-img);overflow:hidden;background:var(--c-surface-2);box-shadow:var(--sh-1);}
.sell-media img{width:100%;height:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s ease;}
.sell-row:hover .sell-media img{transform:scale(1.04);}
.sell-num{font-size:44px;font-weight:800;line-height:1;color:transparent;-webkit-text-stroke:1.6px rgba(255,90,30,.6);font-variant-numeric:tabular-nums;display:block;margin-bottom:14px;}
.sell-body h3{font-size:clamp(21px,2.3vw,26px);margin-bottom:16px;}
.sell-body p{color:var(--c-muted);font-size:16.5px;line-height:1.9;}
.point-list{margin-top:22px;display:flex;flex-direction:column;gap:12px;}
.point-list li{display:flex;align-items:flex-start;gap:10px;font-size:15.5px;color:var(--c-ink-2);}
.point-list li::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--c-primary);margin-top:9px;flex-shrink:0;}

/* ---------- demo ---------- */
.demo-track{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
}
.demo-card{
  background:var(--c-dark-2);border:1px solid rgba(255,255,255,.1);
  border-radius:var(--r-card);overflow:hidden;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.demo-card:hover{transform:translateY(-4px);box-shadow:0 26px 50px -22px rgba(0,0,0,.75);border-color:rgba(255,90,30,.45);}
.demo-thumb{position:relative;background:#0B0E12;}
.demo-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;opacity:.86;transition:transform .5s ease,opacity .3s ease;}
.demo-card:hover .demo-thumb img{transform:scale(1.05);opacity:1;}
.demo-play{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:20px;opacity:.6;transition:opacity .25s ease;pointer-events:none;
}
.demo-play span{
  width:56px;height:56px;border-radius:50%;background:rgba(255,90,30,.9);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 14px 30px -12px rgba(255,90,30,.9);
}
.demo-card:hover .demo-play{opacity:1;}
.demo-body{padding:22px 22px 26px;}
.demo-body h3{font-size:18px;margin-bottom:10px;color:#fff;}
.demo-body p{font-size:14.5px;line-height:1.75;color:#9AA2AE;margin:0;}

/* ---------- proof ---------- */
.badge-band{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:56px;}
.badge-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--sh-1);transition:transform .25s ease,box-shadow .25s ease;
}
.badge-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);}
.badge-card b{display:block;font-size:30px;font-weight:800;color:var(--c-primary);font-variant-numeric:tabular-nums;line-height:1.1;margin-bottom:8px;}
.badge-card small{font-size:13.5px;color:var(--c-muted);font-weight:600;letter-spacing:.02em;}
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:60px;align-items:start;}
.testi-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:30px 28px;box-shadow:var(--sh-1);position:relative;transition:transform .25s ease,box-shadow .25s ease;
}
.testi-card:nth-child(2){transform:translateY(-24px);}
.testi-card:hover{box-shadow:var(--sh-2);}
.testi-card::before{
  content:"\201C";font-size:64px;line-height:1;color:rgba(255,90,30,.18);
  font-family:Georgia,serif;display:block;margin-bottom:6px;
}
.testi-card p{font-size:15.5px;color:var(--c-ink-2);line-height:1.85;}
.testi-user{display:flex;align-items:center;gap:12px;margin-top:22px;padding-top:20px;border-top:1px solid var(--c-line);}
.testi-avatar{
  width:44px;height:44px;border-radius:50%;overflow:hidden;flex-shrink:0;background:var(--c-surface-2);
}
.testi-avatar img{width:100%;height:100%;object-fit:cover;}
.testi-user strong{display:block;font-size:15px;font-weight:700;}
.testi-user span{display:block;font-size:13px;color:var(--c-muted);}
.logo-wall{display:flex;flex-wrap:wrap;gap:14px;}
.logo-chip{
  display:flex;align-items:center;gap:9px;
  padding:12px 20px;border:1px solid var(--c-line);border-radius:var(--r-pill);
  background:var(--c-surface);font-size:14px;font-weight:650;color:var(--c-muted);
  filter:grayscale(40%);transition:filter .25s ease,color .25s ease,border-color .25s ease,transform .25s ease;
}
.logo-chip i{font-size:15px;}
.logo-chip:hover{filter:grayscale(0);color:var(--c-ink);border-color:rgba(255,90,30,.4);transform:translateY(-2px);}
.logo-chip:hover i{color:var(--c-primary);}

/* ---------- news / cms ---------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;}
.news-head h2{font-size:clamp(26px,3.2vw,38px);margin-bottom:12px;}
.news-head p{color:var(--c-muted);font-size:16px;max-width:620px;margin:0;}
.news-more{font-size:15px;font-weight:700;color:var(--c-primary);display:inline-flex;align-items:center;gap:8px;white-space:nowrap;}
.news-more:hover{color:var(--c-primary-dark);gap:12px;}
.news-grid{margin-bottom:-30px;}
.news-col{margin-bottom:30px;}
.news-card{
  height:100%;display:flex;flex-direction:column;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);transition:transform .25s ease,box-shadow .25s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);}
.news-thumb{display:block;background:var(--c-surface-2);overflow:hidden;}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .5s ease;}
.news-card:hover .news-thumb img{transform:scale(1.05);}
.news-body{padding:24px 24px 22px;display:flex;flex-direction:column;flex:1;}
.tag{
  display:inline-flex;align-items:center;gap:6px;align-self:flex-start;
  padding:4px 12px;border-radius:var(--r-pill);
  border:1px solid rgba(18,214,160,.5);color:#0B9C77;
  background:rgba(18,214,160,.1);font-size:12.5px;font-weight:650;letter-spacing:.02em;
  margin-bottom:14px;
}
.news-body h3{font-size:19px;line-height:1.45;margin-bottom:12px;}
.news-body h3 a:hover{color:var(--c-primary);}
.news-excerpt{
  font-size:14.5px;line-height:1.8;color:var(--c-muted);margin-bottom:20px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-muted);font-variant-numeric:tabular-nums;
}
.news-meta i{color:var(--c-primary);}
.empty-state{
  background:var(--c-surface);border:1px dashed var(--c-line);border-radius:var(--r-card);
  padding:64px 32px;text-align:center;
}
.empty-state i{font-size:30px;color:var(--c-primary);margin-bottom:16px;display:block;}
.empty-state p{color:var(--c-muted);margin-bottom:22px;}

/* ---------- price ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;align-items:stretch;}
.price-card{
  position:relative;display:flex;flex-direction:column;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:36px 32px 34px;box-shadow:var(--sh-1);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.price-card:hover{box-shadow:var(--sh-2);transform:translateY(-4px);}
.price-card--hot{
  border:2px solid var(--c-primary);transform:translateY(-10px);
  box-shadow:0 28px 56px -24px rgba(255,90,30,.55);
}
.price-card--hot:hover{transform:translateY(-14px);}
.price-flag{
  position:absolute;top:-15px;left:32px;
  background:var(--c-primary);color:#fff;font-size:12.5px;font-weight:700;
  padding:6px 14px;border-radius:var(--r-pill);letter-spacing:.04em;
}
.price-name{font-size:17px;font-weight:700;color:var(--c-ink-2);margin-bottom:16px;}
.price-value{display:flex;align-items:baseline;gap:6px;margin-bottom:6px;}
.price-value b{font-size:48px;font-weight:800;line-height:1;font-variant-numeric:tabular-nums;letter-spacing:-.02em;}
.price-value span{font-size:15px;color:var(--c-muted);font-weight:600;}
.price-note{font-size:13.5px;color:var(--c-muted);margin-bottom:26px;}
.price-feats{display:flex;flex-direction:column;gap:13px;margin-bottom:30px;}
.price-feats li{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:var(--c-ink-2);line-height:1.7;}
.price-feats li i{color:var(--c-primary);font-size:14px;margin-top:6px;}
.price-card .btn{margin-top:auto;}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--c-dark);color:#fff;padding:96px 0;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,90,30,.28),transparent 68%);
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.cta-copy h2{font-size:clamp(26px,3.4vw,40px);color:#fff;margin-bottom:18px;}
.cta-copy p{color:#AEB5BF;font-size:16.5px;margin-bottom:24px;}
.cta-points{display:flex;flex-direction:column;gap:12px;}
.cta-points li{display:flex;align-items:center;gap:10px;font-size:15px;color:#D6DBE2;}
.cta-points li i{color:var(--c-accent);font-size:14px;}
.cta-form{
  background:var(--c-dark-2);border:1px solid rgba(255,255,255,.1);
  border-radius:var(--r-card);padding:32px 30px;
}
.cta-form label{display:block;font-size:13.5px;font-weight:650;color:#B6BDC7;margin-bottom:8px;}
.cta-form input,.cta-form textarea{
  width:100%;min-height:48px;padding:12px 14px;border-radius:var(--r-input);
  background:#0E1116;border:1px solid rgba(255,255,255,.14);color:#fff;
  font-size:15px;font-family:inherit;line-height:1.6;margin-bottom:18px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.cta-form textarea{resize:vertical;}
.cta-form input::placeholder,.cta-form textarea::placeholder{color:#6C7480;}
.cta-form input:focus,.cta-form textarea:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 2px rgba(255,90,30,.35);
}
.form-note{font-size:13px;color:#8B939E;margin:14px 0 0;line-height:1.7;}
.form-note.is-ok{color:var(--c-accent);}

/* ---------- faq ---------- */
.faq-wrap{display:grid;grid-template-columns:40% 60%;gap:56px;align-items:start;}
.faq-side h2{font-size:clamp(26px,3.4vw,38px);margin-bottom:18px;}
.faq-side p{color:var(--c-muted);font-size:16.5px;margin-bottom:26px;}
.faq-side .btn{margin-bottom:14px;}
.faq-side small{display:block;font-size:13.5px;color:var(--c-muted);}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item.is-open{border-color:rgba(255,90,30,.45);box-shadow:var(--sh-1);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:60px;padding:16px 24px;background:transparent;border:none;
  text-align:left;font-size:16px;font-weight:650;color:var(--c-ink);cursor:pointer;line-height:1.6;
}
.faq-q:hover{color:var(--c-primary);}
.faq-q i{color:var(--c-primary);font-size:14px;transition:transform .25s ease;flex-shrink:0;}
.faq-item.is-open .faq-q i{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-item.is-open .faq-a{max-height:360px;}
.faq-a-inner{
  padding:0 24px 22px 24px;font-size:15px;line-height:1.9;color:var(--c-muted);
  border-left:3px solid var(--c-primary);margin-left:24px;padding-left:18px;margin-bottom:20px;
}

/* ---------- footer ---------- */
.site-footer{background:#0C0F13;color:#A8AEB8;padding:78px 0 0;font-size:14.5px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:56px;}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:20px;letter-spacing:.02em;}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:18px;}
.footer-brand .brand-mark{width:36px;height:36px;border-radius:11px;}
.footer-brand .brand-name{color:#fff;font-size:16.5px;font-weight:750;}
.footer-desc{line-height:1.85;color:#8E959F;margin-bottom:20px;max-width:320px;}
.footer-social{display:flex;gap:10px;}
.footer-social a{
  width:40px;height:40px;border-radius:12px;border:1px solid rgba(255,255,255,.14);
  display:flex;align-items:center;justify-content:center;color:#A8AEB8;
}
.footer-social a:hover{color:#fff;border-color:var(--c-primary);background:rgba(255,90,30,.14);}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col ul a:hover{color:var(--c-primary);}
.footer-contact li{display:flex;gap:10px;line-height:1.75;}
.footer-contact i{color:var(--c-primary);margin-top:5px;font-size:13px;width:16px;flex-shrink:0;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding:24px 0;
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  font-size:13.5px;color:#7A818C;
}
.footer-links{display:flex;flex-wrap:wrap;gap:18px;}
.footer-links a:hover{color:var(--c-primary);}

/* ---------- float cta ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:900;
  display:inline-flex;align-items:center;gap:9px;
  height:54px;padding:0 24px;border-radius:var(--r-pill);
  background:var(--c-primary);color:#fff;font-weight:700;font-size:15px;
  box-shadow:0 20px 40px -18px rgba(255,90,30,.95);
  transition:transform .2s ease,background-color .2s ease;
}
.float-cta:hover{background:var(--c-primary-dark);transform:translateY(-3px);color:#fff;}
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:950;
  height:56px;display:none;align-items:center;gap:12px;padding:0 14px;
  background:rgba(16,19,24,.97);border-top:1px solid rgba(255,255,255,.1);
  color:#fff;opacity:0;visibility:hidden;transition:opacity .3s ease;
}
.mobile-bar.is-visible{opacity:1;visibility:visible;}
.mobile-bar span{font-size:14px;font-weight:600;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.mobile-bar .bar-call{
  width:40px;height:40px;border-radius:12px;border:1px solid rgba(255,255,255,.2);
  display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0;
}
.mobile-bar .btn{min-height:40px;font-size:14px;padding:0 18px;}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .container{padding:0 24px;}
  .section{padding:76px 0;}
  .nav-links{display:none;}
  .nav-toggle{display:flex;}
  .nav-actions .btn-sm{display:none;}
  .hero{padding:calc(var(--nav-h) + 64px) 0 64px;}
  .hero-strip{grid-template-columns:repeat(2,1fr);row-gap:26px;}
  .hero-stat:nth-child(2){border-right:none;}
  .sell-row,.sell-row:nth-child(2){grid-template-columns:1fr;gap:28px;}
  .sell-row:nth-child(2) .sell-media{order:0;}
  .demo-track{grid-template-columns:repeat(2,1fr);}
  .badge-band{grid-template-columns:repeat(2,1fr);}
  .testi-grid{grid-template-columns:1fr;}
  .testi-card:nth-child(2){transform:none;}
  .price-grid{grid-template-columns:1fr;}
  .price-card--hot{transform:none;}
  .price-card--hot:hover{transform:translateY(-4px);}
  .cta-inner{grid-template-columns:1fr;gap:40px;}
  .faq-wrap{grid-template-columns:1fr;gap:36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .float-cta{width:56px;height:56px;padding:0;justify-content:center;}
  .float-cta span{display:none;}
}
@media (max-width:640px){
  body{font-size:16px;}
  .container{padding:0 18px;}
  .section{padding:56px 0;}
  .hero{padding:calc(var(--nav-h) + 46px) 0 52px;background-image:linear-gradient(160deg,rgba(16,19,24,.94) 0%,rgba(16,19,24,.76) 100%),url('/assets/images/backpic/back-1.webp');}
  .hero h1{font-size:clamp(28px,7.4vw,36px);}
  .hero-sub{font-size:16px;}
  .hero-actions .btn{width:100%;}
  .hero-strip{grid-template-columns:1fr;border-top:none;padding-top:0;gap:20px;}
  .hero-stat{border-right:none;border-bottom:1px solid rgba(255,255,255,.14);padding-bottom:16px;padding-right:0;}
  .hero-stat:last-child{border-bottom:none;}
  .scroll-hint{display:none;}
  .news-head{flex-direction:column;align-items:flex-start;gap:14px;}
  .demo-track{grid-template-columns:1fr;overflow-x:auto;scroll-snap-type:x mandatory;gap:16px;padding-bottom:8px;}
  .demo-card{scroll-snap-align:start;}
  .badge-band{grid-template-columns:1fr;gap:14px;}
  .cta-form{padding:24px 20px;}
  .faq-q{font-size:15.5px;padding:14px 18px;}
  .faq-a-inner{margin-left:16px;padding-left:14px;padding-right:18px;}
  .footer-grid{grid-template-columns:1fr;}
  .float-cta{display:none;}
  .mobile-bar{display:flex;}
  .brand-sub{display:none;}
}

/* roulang page: article */
:root{
  --c-primary:#FF5A1E;
  --c-primary-dark:#DC430C;
  --c-accent:#12D6A0;
  --c-ink:#14171A;
  --c-ink-2:#2A2F36;
  --c-dark:#101318;
  --c-dark-2:#1B2027;
  --c-bg:#F7F6F3;
  --c-surface:#FFFFFF;
  --c-surface-2:#EFEDE8;
  --c-line:#E3E0DA;
  --c-muted:#6E7580;
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --shadow-1:0 1px 2px rgba(16,19,24,.04),0 12px 32px -12px rgba(16,19,24,.14);
  --shadow-2:0 22px 48px -18px rgba(16,19,24,.22);
  --max:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;padding-top:72px;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.9;color:var(--c-ink);background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;background:var(--c-surface-2)}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;line-height:1.25}
p{margin:0}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.container{max-width:var(--max);margin:0 auto;padding:0 32px}
.num{font-variant-numeric:tabular-nums}

/* ===== 导航 ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;height:72px;z-index:900;
  background:rgba(247,246,243,.92);border-bottom:1px solid transparent;
  transition:background .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{
  background:rgba(247,246,243,.98);
  border-bottom-color:var(--c-line);
  box-shadow:0 10px 30px -22px rgba(16,19,24,.45);
}
.nav-inner{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(140deg,#FF7F45,#FF5A1E);
  color:#fff;font-weight:800;font-size:20px;line-height:1;
  box-shadow:0 12px 24px -14px rgba(255,90,30,.95);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-size:17px;font-weight:800;letter-spacing:.01em}
.brand-sub{font-size:10.5px;letter-spacing:.16em;color:var(--c-muted);font-weight:600}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-link{
  position:relative;font-size:15px;font-weight:600;color:var(--c-ink-2);
  padding:6px 0;transition:color .2s ease;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--c-primary);border-radius:2px;transition:width .25s ease;
}
.nav-link:hover{color:var(--c-primary)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--c-ink)}
.nav-link.is-active::before{
  content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%);
  width:6px;height:6px;border-radius:50%;background:var(--c-primary);
}
.nav-link--pill{
  height:36px;padding:0 16px;border:1px solid var(--c-line);border-radius:999px;
  display:inline-flex;align-items:center;
}
.nav-link--pill::after{display:none}
.nav-link--pill:hover{border-color:var(--c-primary);background:rgba(255,90,30,.06)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--c-line);background:var(--c-surface);
  align-items:center;justify-content:center;font-size:18px;
}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:999px;
  font-size:16px;font-weight:700;white-space:nowrap;
  transition:transform .22s ease,background .22s ease,box-shadow .22s ease,border-color .22s ease,color .22s ease;
}
.btn i{font-size:13px}
.btn-sm{min-height:40px;font-size:15px;padding:0 18px}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 14px 28px -16px rgba(255,90,30,.95)}
.btn-primary:hover{background:var(--c-primary-dark);transform:translateY(-2px);box-shadow:0 20px 36px -18px rgba(220,67,12,.95)}
.btn-ghost{background:var(--c-surface);border:1px solid var(--c-line);color:var(--c-ink)}
.btn-ghost:hover{border-color:var(--c-ink);transform:translateY(-2px)}
.btn-dark{background:var(--c-dark);color:#fff}
.btn-dark:hover{background:var(--c-ink-2);transform:translateY(-2px)}
.btn-block{width:100%}

/* ===== 页头带 ===== */
.page-band{background:var(--c-surface);border-bottom:1px solid var(--c-line);padding:34px 0 36px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);margin-bottom:18px}
.crumb li{display:flex;align-items:center;gap:8px}
.crumb li+li::before{content:"/";color:#C6C2BB}
.crumb a{transition:color .2s ease}
.crumb a:hover{color:var(--c-primary)}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:999px;border:1px solid rgba(18,214,160,.5);background:rgba(18,214,160,.1);
  color:#07855F;font-size:12.5px;font-weight:700;letter-spacing:.02em;
}
.page-title{
  font-size:clamp(30px,4vw,44px);font-weight:800;line-height:1.2;
  margin:14px 0 18px;max-width:900px;letter-spacing:-.01em;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  font-size:14px;color:var(--c-muted);padding-top:16px;border-top:1px solid var(--c-line);
  max-width:900px;
}
.meta-row span{display:inline-flex;align-items:center;gap:7px}
.meta-row i{color:var(--c-primary);font-size:13px}

/* ===== 文章主体 ===== */
.article-wrap{padding:48px 0 8px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start}
.article-cover{margin-bottom:32px}
.article-cover img{
  width:100%;aspect-ratio:21/9;object-fit:cover;border-radius:var(--r-card);
  box-shadow:var(--shadow-1);
}
.article-body{font-size:17px;line-height:1.95;color:#22262B;max-width:760px}
.article-body> :first-child{margin-top:0}
.article-body p{margin:0 0 1.25em}
.article-body h2{
  font-size:clamp(22px,2.4vw,28px);font-weight:750;line-height:1.35;
  margin:2.4em 0 .7em;padding-left:14px;position:relative;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;
  border-radius:2px;background:var(--c-primary);
}
.article-body h3{font-size:20px;font-weight:700;margin:1.8em 0 .5em}
.article-body h4{font-size:17.5px;font-weight:700;margin:1.6em 0 .5em}
.article-body ul{margin:0 0 1.3em}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:.55em}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.78em;width:6px;height:6px;
  border-radius:1px;background:var(--c-primary);
}
.article-body ol{list-style:decimal;padding-left:1.5em;margin:0 0 1.3em}
.article-body ol li{margin-bottom:.5em}
.article-body blockquote{
  margin:1.6em 0;padding:20px 22px;background:var(--c-surface-2);
  border-left:4px solid var(--c-primary);border-radius:0 12px 12px 0;color:#3A4048;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:1.6em auto;max-width:100%;height:auto}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;color:var(--c-muted);text-align:center;margin-top:10px}
.article-body a{color:var(--c-primary-dark);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--c-primary)}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px}
.article-body th{background:var(--c-ink);color:#fff;padding:12px 14px;text-align:left;font-weight:700}
.article-body td{padding:12px 14px;border-bottom:1px solid var(--c-line)}
.article-body tbody tr:nth-child(even){background:#FBFAF8}
.article-body pre{
  background:var(--c-dark);color:#E6E9EE;padding:18px 20px;border-radius:12px;
  overflow:auto;font-size:14px;line-height:1.7;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body code{
  background:#F0EEE9;padding:2px 6px;border-radius:6px;font-size:.92em;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body pre code{background:none;padding:0}
.article-body hr{border:0;border-top:1px solid var(--c-line);margin:2em 0}

.empty-state{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:48px 32px;text-align:center;box-shadow:var(--shadow-1);
}
.empty-state i{font-size:32px;color:var(--c-primary);margin-bottom:16px;display:block}
.empty-state h2{font-size:22px;font-weight:750;margin-bottom:10px}
.empty-state p{color:var(--c-muted);font-size:15px;margin-bottom:22px}

/* ===== 正文尾部 ===== */
.article-foot{max-width:760px;margin-top:44px;padding-top:28px;border-top:1px solid var(--c-line)}
.foot-block{margin-bottom:32px}
.foot-label{font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--c-muted);margin-bottom:14px;text-transform:uppercase}
.tag-list{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:999px;
  background:var(--c-surface);border:1px solid var(--c-line);font-size:13.5px;font-weight:600;
  color:var(--c-ink-2);transition:all .2s ease;
}
.tag:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-2px)}
.share-list{display:flex;flex-wrap:wrap;gap:10px}
.share-list a{
  display:inline-flex;align-items:center;gap:7px;height:34px;padding:0 15px;border-radius:999px;
  border:1px solid var(--c-line);background:var(--c-surface);font-size:13.5px;font-weight:600;
  transition:all .2s ease;
}
.share-list a:hover{border-color:var(--c-ink);transform:translateY(-2px)}
.nav-cards{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.nav-card{
  display:block;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:22px;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.nav-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:#D6D2CA}
.nav-card span{font-size:12.5px;color:var(--c-muted);font-weight:700;letter-spacing:.04em}
.nav-card h3{font-size:17px;font-weight:750;margin:8px 0 6px}
.nav-card p{font-size:14px;color:var(--c-muted);line-height:1.75}

/* ===== 侧栏 ===== */
.sidebar{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.widget{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--shadow-1);
}
.widget h3{font-size:15px;font-weight:750;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.widget h3::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-primary)}
.toc-list li{margin-bottom:4px}
.toc-list a{
  display:block;font-size:14.5px;color:var(--c-ink-2);padding:8px 0;border-bottom:1px dashed var(--c-line);
  transition:color .2s ease,padding-left .2s ease;
}
.toc-list li:last-child a{border-bottom:0}
.toc-list a:hover{color:var(--c-primary);padding-left:6px}
.entry-list li{margin-bottom:14px}
.entry-list li:last-child{margin-bottom:0}
.entry-list a{display:block;font-size:14.5px;font-weight:600;line-height:1.65;transition:color .2s ease}
.entry-list a:hover{color:var(--c-primary)}
.entry-list span{display:block;font-size:12.5px;color:var(--c-muted);margin-top:5px}
.widget-cta{
  background:linear-gradient(160deg,#14171A,#1B2027);border-color:rgba(255,255,255,.08);
  color:#C7CCD4;
}
.widget-cta h3{color:#fff}
.widget-cta p{font-size:14px;line-height:1.8;margin-bottom:16px}
.widget-cta .btn{width:100%;margin-bottom:10px}
.widget-cta .phone{
  display:flex;align-items:center;gap:8px;font-size:14px;color:#fff;font-weight:700;
  font-variant-numeric:tabular-nums;
}
.widget-cta .phone i{color:var(--c-accent)}

/* ===== 相关推荐 ===== */
.related{padding:80px 0 0}
.section-head{margin-bottom:32px}
.section-head h2{font-size:clamp(24px,3vw,34px);font-weight:750}
.section-head p{color:var(--c-muted);font-size:15px;margin-top:10px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{
  display:flex;flex-direction:column;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#D6D2CA}
.post-card .thumb{position:relative;overflow:hidden}
.post-card .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s ease}
.post-card:hover .thumb img{transform:scale(1.04)}
.post-card .body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.post-card h3{
  font-size:17px;font-weight:750;line-height:1.5;margin:10px 0 8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .2s ease;
}
.post-card:hover h3{color:var(--c-primary)}
.post-card p{
  font-size:14px;color:var(--c-muted);line-height:1.8;margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card .meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-muted);padding-top:14px;border-top:1px solid var(--c-line);
}
.post-card .meta i{color:var(--c-primary);transition:transform .2s ease}
.post-card:hover .meta i{transform:translateX(4px)}

/* ===== 返回入口 ===== */
.back-band{background:var(--c-surface);border-top:1px solid var(--c-line);margin-top:80px;padding:44px 0}
.back-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px}
.back-inner h2{font-size:20px;font-weight:750}
.back-inner p{font-size:14.5px;color:var(--c-muted);margin-top:8px}

/* ===== 回到顶部 ===== */
.to-top{
  position:fixed;right:24px;bottom:28px;width:48px;height:48px;border-radius:50%;
  background:var(--c-surface);border:1px solid var(--c-primary);color:var(--c-primary);
  display:grid;place-items:center;font-size:16px;z-index:880;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s ease,background .2s ease,color .2s ease;
  box-shadow:var(--shadow-1);
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--c-primary);color:#fff}

/* ===== 移动抽屉 ===== */
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:86%;max-width:380px;background:var(--c-surface);
  z-index:1000;transform:translateX(102%);transition:transform .3s ease;
  display:flex;flex-direction:column;padding:22px 22px 26px;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:18px;border-bottom:1px solid var(--c-line)}
.drawer-head .brand-name{font-size:16px;font-weight:800}
.drawer-close{width:40px;height:40px;border-radius:12px;border:1px solid var(--c-line);display:grid;place-items:center;font-size:16px}
.drawer-links{margin-top:10px;flex:1}
.drawer-links a{
  display:flex;align-items:center;justify-content:space-between;height:52px;
  font-size:15.5px;font-weight:600;border-bottom:1px solid var(--c-line);color:var(--c-ink-2);
}
.drawer-links a i{color:var(--c-muted);font-size:12px}
.drawer-links a.is-active{color:var(--c-primary)}
.drawer-foot{padding-top:20px}
.drawer-foot .btn{margin-bottom:12px}
.drawer-phone{display:flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:700;color:var(--c-ink)}
.drawer-phone i{color:var(--c-primary)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(16,19,24,.5);z-index:999;
  opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible}

/* ===== 页脚 ===== */
.site-footer{background:#0C0F13;color:#A8AEB8;margin-top:96px;padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:48px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff}
.footer-brand .brand-name{font-size:16px;font-weight:800}
.footer-desc{font-size:14.5px;line-height:1.85;margin:16px 0 20px;max-width:320px}
.footer-social{display:flex;gap:10px}
.footer-social a{
  width:38px;height:38px;border-radius:50%;border:1px solid rgba(255,255,255,.14);
  display:grid;place-items:center;color:#C7CCD4;transition:all .2s ease;
}
.footer-social a:hover{background:var(--c-primary);border-color:var(--c-primary);color:#fff}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px}
.footer-col ul li{margin-bottom:12px;font-size:14.5px}
.footer-col ul li a{transition:color .2s ease}
.footer-col ul li a:hover{color:var(--c-primary)}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;line-height:1.7}
.footer-contact i{color:var(--c-primary);margin-top:6px;font-size:13px}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.1);padding:22px 0;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;font-size:13.5px;
}
.footer-links{display:flex;flex-wrap:wrap;gap:18px}
.footer-links a:hover{color:var(--c-primary)}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .container{padding:0 24px}
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .nav-actions .btn-sm{display:none}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:40px}
  .sidebar{position:static;flex-direction:row;flex-wrap:wrap}
  .widget{flex:1 1 260px}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
  .page-band{padding:28px 0 30px}
}
@media (max-width:768px){
  .article-wrap{padding:32px 0 0}
  .article-body{font-size:16.5px;line-height:1.92}
  .nav-cards{grid-template-columns:1fr}
  .related{padding:56px 0 0}
  .related-grid{grid-template-columns:1fr;gap:20px}
  .site-footer{margin-top:64px;padding-top:48px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .back-band{margin-top:56px;padding:32px 0}
  .to-top{right:16px;bottom:18px}
}
@media (max-width:520px){
  .container{padding:0 18px}
  body{padding-top:64px}
  .site-header,.nav-inner{height:64px}
  .brand-name{font-size:15px}
  .brand-sub{display:none}
  .brand-mark{width:36px;height:36px;font-size:18px}
  .page-band{padding:24px 0 26px}
  .meta-row{gap:8px 16px;font-size:13px}
  .btn{font-size:15px}
  .widget{padding:18px}
  .article-body{padding:0}
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root{
  --c-primary:#FF5A1E;
  --c-primary-dark:#DC430C;
  --c-accent:#12D6A0;
  --c-ink:#14171A;
  --c-ink-2:#2A2F36;
  --c-dark:#101318;
  --c-dark-2:#1B2027;
  --c-bg:#F7F6F3;
  --c-surface:#FFFFFF;
  --c-surface-2:#EFEDE8;
  --c-line:#E3E0DA;
  --c-muted:#6E7580;
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --sh-sm:0 1px 2px rgba(16,19,24,.04), 0 12px 32px -12px rgba(16,19,24,.14);
  --sh-lg:0 22px 48px -18px rgba(16,19,24,.22);
  --container:1240px;
}

/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.9;color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;background:var(--c-surface-2)}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:750;line-height:1.25;color:var(--c-ink)}
h1{font-size:clamp(32px,5vw,56px);line-height:1.15;font-weight:800;letter-spacing:-.01em}
h2{font-size:clamp(26px,3.4vw,40px);line-height:1.2;margin-top:1.8em;margin-bottom:.6em}
h3{font-size:20px;line-height:1.35;font-weight:700}
p{margin:0 0 1.15em}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.muted{color:var(--c-muted)}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:999px;
  font-size:15px;font-weight:700;line-height:1;letter-spacing:.01em;
  border:1px solid transparent;transition:all .22s ease;white-space:nowrap;
}
.btn i{font-size:13px}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 12px 24px -14px rgba(255,90,30,.9)}
.btn-primary:hover,.btn-primary:focus{background:var(--c-primary-dark);transform:translateY(-2px);color:#fff}
.btn-ghost{border-color:var(--c-ink);color:var(--c-ink);background:transparent}
.btn-ghost:hover{background:var(--c-ink);color:#fff;transform:translateY(-2px)}
.btn-ghost-light{border-color:rgba(255,255,255,.45);color:#fff}
.btn-ghost-light:hover{background:#fff;color:var(--c-ink);transform:translateY(-2px)}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}

/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(247,246,243,.92);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  background:rgba(247,246,243,.97);
  border-bottom-color:var(--c-line);
  box-shadow:0 10px 30px -22px rgba(16,19,24,.45);
}
.nav-inner{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  width:40px;height:40px;border-radius:12px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--c-primary),#FF8A3D);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:800;font-size:20px;letter-spacing:-.05em;
  box-shadow:0 10px 20px -12px rgba(255,90,30,.9);
}
.brand-mark span{display:block;transform:translateY(-1px)}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-size:17px;font-weight:800;letter-spacing:.01em}
.brand-sub{font-size:10px;font-weight:600;letter-spacing:.18em;color:var(--c-muted);text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:auto}
.nav-link{
  position:relative;font-size:15px;font-weight:600;color:var(--c-ink-2);
  padding:6px 0;transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--c-primary);transition:width .25s ease;
}
.nav-link:hover{color:var(--c-primary)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--c-ink)}
.nav-link.is-active::after{width:100%}
.nav-link--pill{
  border:1px solid var(--c-line);border-radius:999px;padding:8px 16px;height:36px;
  display:inline-flex;align-items:center;background:var(--c-surface);
}
.nav-link--pill::after{display:none}
.nav-link--pill:hover{border-color:var(--c-primary);color:var(--c-primary)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--c-line);background:var(--c-surface);
  align-items:center;justify-content:center;font-size:17px;color:var(--c-ink);
}
.nav-toggle:hover{border-color:var(--c-primary);color:var(--c-primary)}

/* 移动抽屉 */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:86%;max-width:380px;z-index:1200;
  background:var(--c-surface);
  box-shadow:-24px 0 60px -30px rgba(16,19,24,.5);
  transform:translateX(102%);transition:transform .3s ease;
  display:flex;flex-direction:column;padding:20px;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-close{width:44px;height:44px;border-radius:12px;border:1px solid var(--c-line);display:flex;align-items:center;justify-content:center}
.drawer-list{flex:1 1 auto;overflow-y:auto}
.drawer-list a{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;padding:0 4px;border-bottom:1px solid var(--c-line);
  font-size:16px;font-weight:600;color:var(--c-ink-2);
}
.drawer-list a i{color:var(--c-muted);font-size:13px}
.drawer-list a.is-active{color:var(--c-primary)}
.drawer-foot{padding-top:16px;display:flex;flex-direction:column;gap:10px}
.drawer-mask{
  position:fixed;inset:0;background:rgba(16,19,24,.45);z-index:1100;
  opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible}

/* ============ 页头带 ============ */
.page-band{padding:132px 0 0;background:var(--c-bg)}
.band-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;font-size:14px;color:var(--c-muted);margin-bottom:18px}
.crumbs a{color:var(--c-muted);transition:color .2s ease}
.crumbs a:hover{color:var(--c-primary)}
.crumbs .sep{color:#C6C2BA}
.badge-cat{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  border:1px solid rgba(18,214,160,.5);
  background:rgba(18,214,160,.08);
  color:#0A9E77;font-size:12.5px;font-weight:700;letter-spacing:.02em;
  margin-bottom:18px;
}
.badge-cat::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent)}
.page-band h1{max-width:16em;margin-bottom:18px}
.band-lead{font-size:17px;color:var(--c-ink-2);max-width:620px;margin-bottom:0}
.band-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.band-media{border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-sm);border:1px solid var(--c-line)}
.band-media img{width:100%;aspect-ratio:16/10;object-fit:cover}

.stat-strip{
  margin-top:64px;border-top:1px solid var(--c-line);
  display:grid;grid-template-columns:repeat(4,1fr);
}
.stat-item{padding:28px 24px 34px;border-right:1px solid var(--c-line)}
.stat-item:first-child{padding-left:0}
.stat-item:last-child{border-right:0}
.stat-value{font-size:clamp(34px,4vw,48px);font-weight:800;color:var(--c-primary);line-height:1;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stat-label{display:block;margin-top:10px;font-size:12.5px;color:var(--c-muted);font-weight:600;letter-spacing:.02em}

/* ============ 主体两栏 ============ */
.main-layout{margin-left:-16px;margin-right:-16px;display:flex;flex-wrap:wrap}
.main-layout > .cell{padding-left:16px;padding-right:16px}
.main-col{width:66.6667%}
.side-col{width:33.3333%}

.content-block{padding-bottom:56px;margin-bottom:56px;border-bottom:1px solid var(--c-line)}
.content-block:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
.num-tag{
  display:inline-block;font-size:14px;font-weight:800;letter-spacing:.14em;
  color:var(--c-primary);margin-bottom:12px;
}
.content-block h2{margin-top:0;margin-bottom:18px;font-size:clamp(24px,2.6vw,32px)}
.split{display:grid;grid-template-columns:7fr 5fr;gap:36px;align-items:center;margin:28px 0}
.split.split--reverse{grid-template-columns:5fr 7fr}
.split img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);box-shadow:var(--sh-sm)}
.dot-list li{
  position:relative;padding-left:20px;margin-bottom:10px;color:var(--c-ink-2);font-size:16px;
}
.dot-list li::before{
  content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;border-radius:2px;
  background:var(--c-primary);
}

/* 特性卡 2×2 */
.feature-wrap{margin-top:36px}
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.feature-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px 24px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--sh-lg);border-color:rgba(255,90,30,.3)}
.feature-icon{
  width:44px;height:44px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:rgba(255,90,30,.1);color:var(--c-primary);font-size:17px;margin-bottom:16px;
}
.feature-card h3{font-size:18px;margin-bottom:8px}
.feature-card p{margin:0;font-size:14.5px;color:var(--c-muted);line-height:1.8}

/* 侧栏 */
.side-col .sticky{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.side-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-sm);
}
.side-card h3{font-size:16px;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.side-card h3 i{color:var(--c-primary);font-size:14px}
.anchor-nav a{
  display:flex;align-items:center;gap:10px;padding:10px 0;
  font-size:14.5px;color:var(--c-ink-2);border-bottom:1px dashed var(--c-line);
  transition:color .2s ease,padding-left .2s ease;
}
.anchor-nav a:last-child{border-bottom:0}
.anchor-nav a::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-line);transition:background .2s ease}
.anchor-nav a:hover{color:var(--c-primary);padding-left:4px}
.anchor-nav a:hover::before{background:var(--c-primary)}
.entry-card{
  display:flex;gap:14px;align-items:center;padding:14px;border-radius:14px;
  border:1px solid var(--c-line);background:var(--c-surface-2);margin-bottom:12px;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease;
}
.entry-card:last-child{margin-bottom:0}
.entry-card:hover{transform:translateY(-3px);box-shadow:var(--sh-lg);background:var(--c-surface)}
.entry-card img{width:58px;height:58px;border-radius:12px;object-fit:cover;flex:0 0 auto}
.entry-card strong{display:block;font-size:14.5px;font-weight:700;margin-bottom:4px}
.entry-card span{font-size:12.5px;color:var(--c-muted);line-height:1.6}
.side-cta{background:var(--c-dark);border-color:var(--c-dark-2);color:#fff}
.side-cta h3{color:#fff}
.side-cta h3 i{color:var(--c-primary)}
.side-cta p{color:#A8AEB8;font-size:14px;margin-bottom:18px}
.side-cta .btn-ghost-light{margin-top:10px}
.side-contact{font-size:14px;color:#D6D9DE;display:flex;flex-direction:column;gap:10px}
.side-contact li{display:flex;gap:10px;align-items:flex-start}
.side-contact i{color:var(--c-primary);margin-top:5px;font-size:13px}

/* ============ 适用场景（深色） ============ */
.scene-section{background:var(--c-dark);color:#fff}
.scene-section h2{color:#fff;margin-top:0;margin-bottom:12px}
.scene-section .section-lead{color:#A8AEB8;max-width:680px;margin-bottom:48px;font-size:16px}
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.scene-card{
  background:var(--c-dark-2);border:1px solid rgba(255,255,255,.1);border-radius:var(--r-card);
  padding:26px 22px;transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.scene-card:hover{transform:translateY(-4px);border-color:rgba(255,90,30,.55);box-shadow:0 24px 50px -26px rgba(0,0,0,.9)}
.scene-card i{color:var(--c-primary);font-size:20px;margin-bottom:16px;display:block}
.scene-card h3{color:#fff;font-size:17px;margin-bottom:10px}
.scene-card p{color:#A8AEB8;font-size:14px;line-height:1.8;margin:0}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start}
.faq-grid h2{margin-top:0;margin-bottom:16px}
.faq-grid .faq-intro{color:var(--c-muted);font-size:15.5px;margin-bottom:24px}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:14px;
  margin-bottom:12px;overflow:hidden;transition:border-color .25s ease,box-shadow .25s ease;
}
.faq-item[open]{border-color:rgba(255,90,30,.4);box-shadow:var(--sh-sm)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:16px;min-height:56px;padding:16px 22px;font-size:16px;font-weight:600;color:var(--c-ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;font-size:12px;
  color:var(--c-primary);transition:transform .25s ease;flex:0 0 auto;
}
.faq-item[open] summary::after{content:"\f068"}
.faq-answer{
  padding:0 22px 20px 22px;color:var(--c-ink-2);font-size:15px;line-height:1.9;
}
.faq-item[open] .faq-answer{border-left:3px solid var(--c-primary);padding-left:19px;margin-left:22px;padding-right:22px}

/* ============ 相关分类 ============ */
.rel-section{background:var(--c-surface-2)}
.rel-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:36px}
.rel-head h2{margin:0}
.rel-head p{margin:8px 0 0;color:var(--c-muted);font-size:15px}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.rel-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .25s ease,box-shadow .25s ease;
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg)}
.rel-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.rel-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1 1 auto}
.rel-body h3{font-size:17.5px;margin-bottom:10px}
.rel-body p{font-size:14px;color:var(--c-muted);margin-bottom:18px;flex:1 1 auto}
.rel-more{font-size:14px;font-weight:700;color:var(--c-primary);display:inline-flex;align-items:center;gap:8px}
.rel-card:hover .rel-more i{transform:translateX(4px)}
.rel-more i{transition:transform .25s ease}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;color:#fff;overflow:hidden;
  background:var(--c-dark);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  opacity:.26;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:48px 48px;opacity:.5;
}
.cta-inner{position:relative;z-index:2;padding:88px 0;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.cta-band h2{color:#fff;margin:0 0 14px}
.cta-band p{color:#B9BEC6;font-size:16px;margin-bottom:0;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}

/* ============ 页脚 ============ */
.site-footer{background:#0C0F13;color:#A8AEB8;padding:80px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:56px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.footer-brand .brand-mark{width:36px;height:36px;border-radius:11px;font-size:18px}
.footer-brand .brand-name{color:#fff;font-size:17px;font-weight:800}
.footer-desc{font-size:14px;line-height:1.85;color:#8E959F;margin-bottom:22px}
.footer-social{display:flex;gap:12px}
.footer-social a{
  width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,255,255,.12);color:#C6CBD2;transition:all .22s ease;
}
.footer-social a:hover{background:var(--c-primary);border-color:var(--c-primary);color:#fff;transform:translateY(-3px)}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px}
.footer-col ul li{margin-bottom:12px}
.footer-col ul li a{font-size:14px;color:#A8AEB8;transition:color .2s ease}
.footer-col ul li a:hover{color:var(--c-primary)}
.footer-contact li{display:flex;gap:10px;font-size:14px;align-items:flex-start;margin-bottom:12px}
.footer-contact i{color:var(--c-primary);margin-top:5px;font-size:13px}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;
  padding:24px 0 28px;font-size:13.5px;color:#7C838D;
}
.footer-links{display:flex;flex-wrap:wrap;gap:20px}
.footer-links a{color:#7C838D;transition:color .2s ease}
.footer-links a:hover{color:var(--c-primary)}

/* ============ 浮动 CTA / 回到顶部 ============ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:900;
  display:inline-flex;align-items:center;gap:8px;
  min-height:52px;padding:0 24px;border-radius:999px;
  background:var(--c-primary);color:#fff;font-weight:700;font-size:15px;
  box-shadow:0 18px 36px -18px rgba(255,90,30,.95);
  transition:transform .25s ease,background .25s ease,opacity .25s ease;
}
.float-cta:hover{background:var(--c-primary-dark);transform:translateY(-3px);color:#fff}
.float-cta.is-hidden{opacity:0;visibility:hidden;transform:translateY(10px)}
.to-top{
  position:fixed;right:24px;bottom:92px;z-index:900;
  width:46px;height:46px;border-radius:50%;
  border:1.5px solid var(--c-primary);background:rgba(255,255,255,.95);
  color:var(--c-primary);display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transition:all .25s ease;
}
.to-top.is-visible{opacity:1;visibility:visible}
.to-top:hover{background:var(--c-primary);color:#fff;transform:translateY(-3px)}

/* ============ 响应式 ============ */
@media screen and (max-width:1024px){
  .container{padding:0 24px}
  .section{padding:72px 0}
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .nav-actions .btn-primary{display:none}
  .band-grid{grid-template-columns:1fr;gap:36px}
  .page-band{padding-top:112px}
  .stat-strip{grid-template-columns:repeat(2,1fr)}
  .stat-item:nth-child(2){border-right:0}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-bottom:1px solid var(--c-line)}
  .main-col,.side-col{width:100%}
  .side-col{margin-top:48px}
  .side-col .sticky{position:static}
  .split,.split.split--reverse{grid-template-columns:1fr;gap:24px}
  .faq-grid{grid-template-columns:1fr;gap:32px}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .rel-grid{grid-template-columns:1fr 1fr}
  .cta-inner{grid-template-columns:1fr;gap:28px;padding:72px 0}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media screen and (max-width:640px){
  body{font-size:16px}
  .container{padding:0 18px}
  .section{padding:56px 0}
  .page-band{padding-top:100px}
  .brand-sub{display:none}
  .feature-grid{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:1fr}
  .rel-grid{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:1fr}
  .stat-item{border-right:0;border-bottom:1px solid var(--c-line);padding-left:0}
  .stat-item:last-child{border-bottom:0}
  .rel-head{flex-direction:column;align-items:flex-start}
  .cta-actions{flex-direction:column;align-items:stretch}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .float-cta{
    right:0;left:0;bottom:0;border-radius:0;min-height:56px;
    justify-content:center;box-shadow:0 -8px 24px -16px rgba(16,19,24,.6);
  }
  .to-top{right:16px;bottom:72px;width:42px;height:42px}
  .site-footer{padding-bottom:64px}
}

/* roulang page: category2 */
:root{
  --c-primary:#FF5A1E;
  --c-primary-dark:#DC430C;
  --c-accent:#12D6A0;
  --c-ink:#14171A;
  --c-ink-2:#2A2F36;
  --c-dark:#101318;
  --c-dark-2:#1B2027;
  --c-bg:#F7F6F3;
  --c-surface:#FFFFFF;
  --c-surface-2:#EFEDE8;
  --c-line:#E3E0DA;
  --c-muted:#6E7580;
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --sh-1:0 1px 2px rgba(16,19,24,.04), 0 12px 32px -12px rgba(16,19,24,.14);
  --sh-2:0 22px 48px -18px rgba(16,19,24,.22);
  --w-container:1240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.9;
  color:var(--c-ink);
  background:var(--c-bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;background-color:var(--c-surface-2);}
a{color:var(--c-ink);text-decoration:none;transition:color .22s ease,border-color .22s ease,background-color .22s ease;}
a:hover{color:var(--c-primary);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:750;color:var(--c-ink);letter-spacing:.01em;}
h1{font-size:clamp(32px,5vw,52px);line-height:1.15;font-weight:800;}
h2{font-size:clamp(26px,3.4vw,38px);line-height:1.2;}
h3{font-size:20px;line-height:1.35;font-weight:700;}
p{margin:0 0 1.15em;}
p:last-child{margin-bottom:0;}
strong{font-weight:700;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
.container{
  width:100%;
  max-width:var(--w-container);
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  line-height:1;
  padding:14px 26px;
  min-height:46px;
  cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background-color .22s ease,color .22s ease,border-color .22s ease;
  white-space:nowrap;
}
.btn i{font-size:13px;}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 10px 24px -12px rgba(255,90,30,.75);}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 18px 36px -14px rgba(255,90,30,.7);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{background:transparent;color:var(--c-ink);border-color:var(--c-ink);}
.btn-outline:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-2px);}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.4);}
.btn-ghost-light:hover{background:rgba(255,255,255,.1);border-color:#fff;color:#fff;transform:translateY(-2px);}
.btn-sm{padding:11px 20px;min-height:44px;font-size:14px;}
.btn-block{width:100%;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.02em;
  padding:6px 14px;
  border-radius:999px;
  border:1px solid rgba(255,90,30,.35);
  background:rgba(255,90,30,.08);
  color:var(--c-primary-dark);
}
.badge-accent{border-color:rgba(18,214,160,.45);background:rgba(18,214,160,.12);color:#0b8a68;}
.tag{display:inline-flex;align-items:center;font-size:12.5px;font-weight:600;letter-spacing:.02em;padding:5px 12px;border-radius:999px;background:var(--c-surface-2);color:var(--c-ink-2);}
.dot{width:6px;height:6px;border-radius:50%;background:var(--c-primary);display:inline-block;flex:0 0 auto;}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:900;
  background:rgba(247,246,243,.86);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid transparent;
  transition:background-color .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.site-header.is-scrolled{background:rgba(247,246,243,.97);border-bottom-color:var(--c-line);box-shadow:0 8px 24px -18px rgba(16,19,24,.4);}
.nav-inner{display:flex;align-items:center;gap:28px;height:72px;}
.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand-mark{
  width:40px;height:40px;border-radius:12px;
  background:linear-gradient(140deg,var(--c-primary),#FF8A4C);
  display:grid;place-items:center;
  color:#fff;font-weight:800;font-size:20px;
  box-shadow:0 10px 20px -10px rgba(255,90,30,.8);
}
.brand-text{display:flex;flex-direction:column;line-height:1.12;}
.brand-name{font-size:17px;font-weight:800;color:var(--c-ink);letter-spacing:.01em;}
.brand-sub{font-size:10.5px;letter-spacing:.16em;color:var(--c-muted);font-weight:600;}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:600;
  color:var(--c-ink-2);
  padding:6px 0;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--c-primary);transition:width .26s ease;
}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after{width:100%;}
.nav-link.is-active{color:var(--c-primary);}
.nav-link.is-active::after{width:100%;}
.nav-link--pill{
  border:1px solid var(--c-line);
  border-radius:999px;
  padding:9px 18px;
  min-height:36px;
  display:inline-flex;
  align-items:center;
}
.nav-link--pill::after{display:none;}
.nav-link--pill:hover{border-color:var(--c-primary);color:var(--c-primary);}
.nav-link--pill.is-active{border-color:var(--c-primary);color:var(--c-primary);background:rgba(255,90,30,.07);}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-toggle{
  display:none;
  width:44px;height:44px;border-radius:12px;
  border:1px solid var(--c-line);background:var(--c-surface);
  color:var(--c-ink);font-size:17px;cursor:pointer;
  align-items:center;justify-content:center;
}

/* ---------- 页头带 ---------- */
.page-hero{
  position:relative;
  padding:140px 0 84px;
  background:var(--c-bg);
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(20,23,26,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(20,23,26,.045) 1px,transparent 1px);
  background-size:48px 48px;
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:1;}
.page-hero-grid{display:flex;align-items:center;gap:56px;flex-wrap:wrap;}
.page-hero-text{flex:1 1 520px;min-width:280px;}
.page-hero-media{flex:1 1 380px;min-width:260px;}
.page-hero-media img{width:100%;border-radius:var(--r-card);box-shadow:var(--sh-1);}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13.5px;color:var(--c-muted);margin-bottom:18px;}
.breadcrumb li{display:inline-flex;align-items:center;gap:10px;}
.breadcrumb li+li::before{content:"/";color:var(--c-line);}
.breadcrumb a{color:var(--c-muted);}
.breadcrumb a:hover{color:var(--c-primary);}
.page-hero h1{margin:16px 0 18px;}
.hero-lead{font-size:17px;color:var(--c-ink-2);max-width:36em;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}

/* ---------- 主区 ---------- */
.main-section{padding:88px 0 96px;background:var(--c-bg);}
.grid-gap{margin-left:-16px;margin-right:-16px;}
.grid-gap>.cell{padding-left:16px;padding-right:16px;}
.grid-gap>.cell.align-self-stretch{display:flex;flex-direction:column;}

.panel{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:34px;box-shadow:var(--sh-1);}
.panel+.panel{margin-top:28px;}
.panel-head{display:flex;align-items:flex-start;gap:18px;margin-bottom:22px;}
.panel-no{
  flex:0 0 auto;font-size:26px;font-weight:800;color:transparent;
  -webkit-text-stroke:1.4px var(--c-primary);
  line-height:1;letter-spacing:.02em;
  padding-top:4px;
  font-variant-numeric:tabular-nums;
}
.panel h2{font-size:24px;margin-bottom:6px;}
.panel-sub{font-size:13.5px;color:var(--c-muted);}
.panel-body{color:var(--c-ink-2);font-size:16.5px;}
.panel-body p{max-width:46em;}
.figure-block{margin-top:22px;}
.figure-block img{width:100%;border-radius:var(--r-img);}
.figure-caption{font-size:13px;color:var(--c-muted);margin-top:10px;text-align:center;}

.point-list{margin-top:20px;display:grid;gap:12px;}
.point-list li{display:flex;gap:12px;font-size:15.5px;color:var(--c-ink-2);line-height:1.75;}
.point-list li .dot{margin-top:11px;}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;padding-left:56px;margin-top:28px;}
.timeline::before{
  content:"";position:absolute;left:15px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(180deg,var(--c-primary),rgba(255,90,30,.15));
}
.timeline-item{position:relative;padding-bottom:32px;}
.timeline-item:last-child{padding-bottom:0;}
.timeline-dot{
  position:absolute;left:-56px;top:2px;
  width:32px;height:32px;border-radius:50%;
  background:var(--c-primary);color:#fff;
  display:grid;place-items:center;
  font-size:12.5px;font-weight:800;
  box-shadow:0 0 0 5px rgba(255,90,30,.14);
  font-variant-numeric:tabular-nums;
}
.timeline-item h3{margin-bottom:8px;font-size:18.5px;}
.timeline-item p{font-size:15.5px;color:var(--c-ink-2);max-width:44em;}
.timeline-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}

/* ---------- 数据条带 ---------- */
.stat-strip{
  margin-top:28px;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  background:var(--c-dark);
  border-radius:var(--r-card);
  overflow:hidden;
}
.stat-item{padding:28px 24px;border-right:1px solid rgba(255,255,255,.1);}
.stat-item:last-child{border-right:0;}
.stat-num{font-size:clamp(28px,3vw,40px);font-weight:800;color:var(--c-primary);line-height:1.1;font-variant-numeric:tabular-nums;}
.stat-label{font-size:12.5px;color:#A8AEB8;letter-spacing:.02em;margin-top:8px;}

/* ---------- 课程形态卡 ---------- */
.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px;}
.course-card{
  border:1px solid var(--c-line);border-radius:var(--r-img);padding:22px;
  background:var(--c-surface-2);
  transition:transform .22s ease,box-shadow .22s ease,background-color .22s ease;
}
.course-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);background:#fff;}
.course-card h4{font-size:16px;font-weight:750;margin-bottom:8px;}
.course-card p{font-size:14.5px;color:var(--c-muted);line-height:1.75;margin:0;}
.course-price{margin-top:14px;font-size:13px;font-weight:700;color:var(--c-primary);font-variant-numeric:tabular-nums;}

/* ---------- 侧栏 ---------- */
.sidebar{display:flex;flex-direction:column;gap:20px;position:sticky;top:100px;}
.side-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-1);}
.side-card h3{font-size:15px;font-weight:750;margin-bottom:14px;letter-spacing:.02em;}
.anchor-list{display:grid;gap:2px;}
.anchor-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:14.5px;color:var(--c-ink-2);padding:11px 12px;border-radius:10px;
}
.anchor-list a:hover{background:var(--c-surface-2);color:var(--c-primary);}
.anchor-list a i{font-size:11px;color:var(--c-muted);}
.side-links{display:grid;gap:12px;}
.side-link{
  display:flex;align-items:center;gap:12px;
  border:1px solid var(--c-line);border-radius:14px;padding:12px;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.side-link:hover{transform:translateY(-2px);border-color:rgba(255,90,30,.4);box-shadow:var(--sh-1);}
.side-link img{width:64px;height:48px;object-fit:cover;border-radius:10px;flex:0 0 auto;}
.side-link span{font-size:14px;font-weight:650;color:var(--c-ink);line-height:1.5;}
.side-link small{display:block;font-size:12px;color:var(--c-muted);font-weight:500;margin-top:2px;}
.callout.side-cta{
  background:var(--c-dark);border:0;color:#fff;border-radius:var(--r-card);
  padding:28px 26px;margin:0;
}
.callout.side-cta h3{color:#fff;font-size:17px;margin-bottom:10px;}
.callout.side-cta p{font-size:14px;color:#A8AEB8;line-height:1.8;}
.callout.side-cta .btn{margin-top:18px;}
.side-contact{display:grid;gap:10px;font-size:14px;color:var(--c-ink-2);}
.side-contact li{display:flex;gap:10px;align-items:flex-start;}
.side-contact i{color:var(--c-primary);margin-top:5px;font-size:13px;}
.side-contact a:hover{color:var(--c-primary);}

/* ---------- FAQ ---------- */
.faq-section{padding:88px 0;background:var(--c-surface-2);}
.faq-head{max-width:640px;margin-bottom:34px;}
.faq-head p{color:var(--c-muted);margin-top:12px;}
.accordion-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:14px;
  margin-bottom:12px;overflow:hidden;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.accordion-item.is-active{border-color:rgba(255,90,30,.4);border-left:3px solid var(--c-primary);box-shadow:var(--sh-1);}
.accordion-title{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:58px;padding:16px 22px;font-size:16px;font-weight:650;color:var(--c-ink);
}
.accordion-title:hover{color:var(--c-primary);}
.accordion-item.is-active .accordion-title{color:var(--c-primary);}
.accordion-title i{font-size:13px;color:var(--c-muted);transition:transform .25s ease;}
.accordion-item.is-active .accordion-title i{transform:rotate(180deg);color:var(--c-primary);}
.accordion-content{display:none;padding:0 22px 22px;font-size:15px;color:var(--c-ink-2);line-height:1.9;}
.accordion-item.is-active .accordion-content{display:block;}

/* ---------- 相关分类 ---------- */
.related-section{padding:88px 0;background:var(--c-bg);}
.related-section h2{margin-bottom:10px;}
.related-desc{color:var(--c-muted);max-width:46em;}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:32px;}
.related-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.related-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(255,90,30,.3);}
.related-card img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.related-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.related-body h3{font-size:17px;}
.related-body p{font-size:14.5px;color:var(--c-muted);line-height:1.8;margin:0;flex:1;}
.related-more{font-size:14px;font-weight:700;color:var(--c-primary);display:inline-flex;align-items:center;gap:8px;}

/* ---------- 深色 CTA 带 ---------- */
.cta-band{background:var(--c-dark);color:#fff;padding:72px 0;}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;}
.cta-band h2{color:#fff;max-width:22em;font-size:clamp(24px,3vw,34px);}
.cta-band p{color:#A8AEB8;margin-top:12px;max-width:40em;font-size:15.5px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- 页脚 ---------- */
.site-footer{background:#0C0F13;color:#A8AEB8;padding:72px 0 0;font-size:14.5px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1.2fr 1.3fr;gap:40px;padding-bottom:52px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-name{color:#fff;font-size:17px;font-weight:800;}
.footer-desc{line-height:1.85;color:#A8AEB8;margin-bottom:20px;}
.footer-social{display:flex;gap:10px;}
.footer-social a{
  width:38px;height:38px;border-radius:11px;border:1px solid rgba(255,255,255,.12);
  display:grid;place-items:center;color:#A8AEB8;font-size:14px;
}
.footer-social a:hover{color:#fff;border-color:var(--c-primary);background:rgba(255,90,30,.14);}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px;}
.footer-col ul{display:grid;gap:11px;}
.footer-col a{color:#A8AEB8;}
.footer-col a:hover{color:var(--c-primary);}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;line-height:1.7;}
.footer-contact i{color:var(--c-primary);margin-top:6px;font-size:13px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:22px 0 30px;
  display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;
  font-size:13.5px;color:#7C838F;
}
.footer-links{display:flex;flex-wrap:wrap;gap:20px;}
.footer-links a{color:#7C838F;}
.footer-links a:hover{color:var(--c-primary);}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1024px){
  .container{padding-left:24px;padding-right:24px;}
  .nav-toggle{display:inline-flex;}
  .nav-links{
    position:fixed;top:0;right:0;bottom:0;
    width:86%;max-width:380px;
    background:var(--c-dark);
    flex-direction:column;align-items:stretch;gap:0;
    padding:88px 24px 32px;
    transform:translateX(102%);
    transition:transform .3s ease;
    z-index:960;
    overflow-y:auto;
  }
  .nav-links.is-open{transform:translateX(0);box-shadow:-24px 0 60px -30px rgba(0,0,0,.7);}
  .nav-link{
    color:#E6E8EC;font-size:16px;padding:16px 0;border-bottom:1px solid rgba(255,255,255,.09);
    width:100%;justify-content:space-between;
  }
  .nav-link::after{display:none;}
  .nav-link:hover,.nav-link.is-active{color:var(--c-primary);}
  .nav-link--pill{border-color:rgba(255,255,255,.16);border-radius:12px;padding:14px 16px;margin-top:18px;justify-content:flex-start;}
  .nav-actions .btn-sm{display:inline-flex;}
  .page-hero{padding:120px 0 64px;}
  .main-section,.faq-section,.related-section{padding:72px 0;}
  .sidebar{position:static;}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .stat-item:nth-child(2){border-right:0;}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-bottom:1px solid rgba(255,255,255,.1);}
  .related-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px;}
}
@media screen and (max-width:640px){
  .container{padding-left:18px;padding-right:18px;}
  .grid-gap{margin-left:0;margin-right:0;}
  .grid-gap>.cell{padding-left:0;padding-right:0;}
  body{font-size:16px;}
  .page-hero{padding:106px 0 52px;}
  .page-hero-grid{gap:32px;}
  .hero-actions .btn{width:100%;}
  .brand-sub{display:none;}
  .nav-actions .btn-sm{padding:10px 14px;min-width:96px;font-size:13px;}
  .panel{padding:24px 20px;}
  .panel-head{gap:12px;}
  .timeline{padding-left:46px;}
  .timeline-dot{left:-46px;width:28px;height:28px;font-size:11.5px;}
  .timeline::before{left:13px;}
  .stat-strip{grid-template-columns:1fr;}
  .stat-item{border-right:0;border-bottom:1px solid rgba(255,255,255,.1);}
  .stat-item:last-child{border-bottom:0;}
  .course-grid{grid-template-columns:1fr;}
  .related-grid{grid-template-columns:1fr;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;padding-bottom:36px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px;}
}

/* roulang page: category3 */
:root{
  --c-primary:#FF5A1E;
  --c-primary-dark:#DC430C;
  --c-accent:#12D6A0;
  --c-ink:#14171A;
  --c-ink-2:#2A2F36;
  --c-dark:#101318;
  --c-dark-2:#1B2027;
  --c-bg:#F7F6F3;
  --c-surface:#FFFFFF;
  --c-surface-2:#EFEDE8;
  --c-line:#E3E0DA;
  --c-muted:#6E7580;
  --r-card:18px;
  --r-img:14px;
  --r-input:12px;
  --shadow-1:0 1px 2px rgba(16,19,24,.04), 0 12px 32px -12px rgba(16,19,24,.14);
  --shadow-2:0 22px 48px -18px rgba(16,19,24,.22);
  --container:1240px;
  --header-h:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding-top:var(--header-h);
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;background:var(--c-surface-2)}
a{color:var(--c-ink);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--c-primary)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:750;line-height:1.25;letter-spacing:-.01em}
h1{font-size:clamp(32px,5vw,52px);font-weight:800;line-height:1.15}
h2{font-size:clamp(24px,3.2vw,38px);line-height:1.2;font-weight:750}
h3{font-size:20px;line-height:1.35;font-weight:700}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
hr{border:none;border-top:1px solid var(--c-line);margin:0}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  height:48px;
  padding:0 26px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:16px;
  font-weight:700;
  line-height:1;
  cursor:pointer;
  white-space:nowrap;
  transition:background-color .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 10px 24px -12px rgba(255,90,30,.7)}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 18px 34px -14px rgba(255,90,30,.75)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--c-ink);border-color:rgba(20,23,26,.28)}
.btn-ghost:hover{border-color:var(--c-ink);color:var(--c-ink);transform:translateY(-2px)}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.36)}
.btn-ghost-light:hover{color:#fff;border-color:#fff;background:rgba(255,255,255,.08)}
.btn-sm{height:40px;padding:0 20px;font-size:15px}
.btn-block{width:100%}

/* ---------- 标签 / 徽章 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  height:30px;
  padding:0 14px;
  border-radius:999px;
  background:rgba(255,90,30,.1);
  border:1px solid rgba(255,90,30,.28);
  color:var(--c-primary-dark);
  font-size:13px;
  font-weight:600;
  letter-spacing:.02em;
}
.badge-accent{
  background:rgba(18,214,160,.12);
  border-color:rgba(18,214,160,.4);
  color:#0a7b5d;
}
.dot{width:7px;height:7px;border-radius:50%;background:var(--c-accent);display:inline-block}

/* ---------- 头部导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:800;
  height:var(--header-h);
  background:rgba(247,246,243,.92);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background-color .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  background:rgba(247,246,243,.99);
  border-bottom-color:var(--c-line);
  box-shadow:0 10px 30px -22px rgba(16,19,24,.5);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  height:var(--header-h);
}
.brand{display:inline-flex;align-items:center;gap:11px;flex:0 0 auto}
.brand-mark{
  width:38px;height:38px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:12px;
  background:linear-gradient(140deg,var(--c-primary),var(--c-primary-dark));
  color:#fff;
  font-weight:800;
  font-size:20px;
  line-height:1;
  box-shadow:0 8px 18px -8px rgba(255,90,30,.8);
}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-size:17px;font-weight:800;color:var(--c-ink);letter-spacing:-.01em}
.brand-sub{font-size:10px;letter-spacing:.22em;color:var(--c-muted);font-weight:600}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:38px;
  font-size:15px;
  font-weight:600;
  color:var(--c-ink-2);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:2px;
  height:2px;
  background:var(--c-primary);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .25s ease;
  border-radius:2px;
}
.nav-link:hover{color:var(--c-primary)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--c-primary)}
.nav-link.is-active::before{
  content:"";
  position:absolute;
  top:4px;right:-11px;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--c-primary);
}
.nav-link--pill{
  height:36px;
  padding:0 16px;
  border:1px solid rgba(20,23,26,.22);
  border-radius:999px;
  gap:8px;
  font-weight:700;
}
.nav-link--pill::after{display:none}
.nav-link--pill:hover{border-color:var(--c-primary);background:rgba(255,90,30,.06)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  border-radius:12px;
  border:1px solid var(--c-line);
  background:var(--c-surface);
  color:var(--c-ink);
  font-size:18px;
  cursor:pointer;
}
.nav-mask{
  position:fixed;inset:0;
  background:rgba(16,19,24,.5);
  opacity:0;visibility:hidden;
  transition:opacity .3s ease,visibility .3s ease;
  z-index:900;
}
body.nav-open .nav-mask{opacity:1;visibility:visible}

/* ---------- 页头带 ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  background:var(--c-surface-2);
  border-bottom:1px solid var(--c-line);
}
.page-hero__bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  opacity:.16;
}
.page-hero__bg::after{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:48px 48px;
  opacity:.5;
}
.page-hero .container{position:relative;z-index:2}
.page-hero__inner{padding:44px 0 64px}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--c-muted);margin-bottom:24px;padding:0}
.breadcrumb li{display:inline-flex;align-items:center;gap:10px}
.breadcrumb a{color:var(--c-muted);font-weight:600}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:var(--c-line);font-weight:400}
.breadcrumb li[aria-current]{color:var(--c-ink-2);font-weight:600}
.page-hero__grid{align-items:center;row-gap:32px}
.page-hero h1{margin:14px 0 18px}
.page-hero__lead{
  max-width:600px;
  font-size:17px;
  line-height:1.9;
  color:var(--c-ink-2);
}
.page-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:0;
  margin-top:34px;
  border-top:1px solid var(--c-line);
  padding-top:22px;
}
.hero-facts li{
  padding-right:28px;
  margin-right:28px;
  border-right:1px solid var(--c-line);
}
.hero-facts li:last-child{border-right:none;margin-right:0;padding-right:0}
.hero-facts b{display:block;font-size:26px;font-weight:800;color:var(--c-primary);line-height:1.2}
.hero-facts span{font-size:13px;color:var(--c-muted)}
.page-hero__figure{
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-2);
  border:1px solid rgba(255,255,255,.7);
  background:var(--c-surface);
}
.page-hero__figure img{width:100%;aspect-ratio:16/10;object-fit:cover}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--light{background:var(--c-bg)}
.section--surface{background:var(--c-surface-2);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.section--dark{background:var(--c-dark);color:#fff}
.section--dark h2,.section--dark h3,.section--dark h4{color:#fff}
.section-head{max-width:720px;margin-bottom:48px}
.section-head .badge{margin-bottom:16px}
.section-head p{color:var(--c-muted);font-size:16px;margin-top:14px}
.section--dark .section-head p{color:#A8AEB8}

/* ---------- 内容主区 ---------- */
.content-grid{row-gap:48px}
.main-col{max-width:100%}
.block{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:36px;
  box-shadow:var(--shadow-1);
  margin-bottom:28px;
}
.block:last-child{margin-bottom:0}
.block-head{display:flex;align-items:flex-start;gap:18px;margin-bottom:22px}
.block-num{
  font-size:32px;
  font-weight:800;
  line-height:1;
  color:transparent;
  -webkit-text-stroke:1.4px rgba(255,90,30,.75);
  font-variant-numeric:tabular-nums;
  flex:0 0 auto;
  padding-top:2px;
}
.block-head h2{font-size:clamp(22px,2.4vw,28px)}
.block-head .kicker{font-size:13px;font-weight:600;color:var(--c-muted);letter-spacing:.06em;text-transform:uppercase;display:block;margin-bottom:6px}
.block p{color:var(--c-ink-2);font-size:16.5px}
.split{display:grid;grid-template-columns:7fr 5fr;gap:28px;align-items:center;margin:26px 0}
.split--rev{grid-template-columns:5fr 7fr}
.split img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img)}
.split figcaption{font-size:13px;color:var(--c-muted);margin-top:10px}
.spot-list{margin:22px 0 0;display:grid;gap:12px}
.spot-list li{
  display:flex;gap:12px;
  font-size:16px;
  color:var(--c-ink-2);
}
.spot-list li::before{
  content:"";
  flex:0 0 auto;
  width:8px;height:8px;
  margin-top:11px;
  border-radius:2px;
  background:var(--c-primary);
}
.note{
  margin-top:24px;
  border-left:4px solid var(--c-primary);
  background:var(--c-surface-2);
  border-radius:0 var(--r-input) var(--r-input) 0;
  padding:18px 22px;
  font-size:15.5px;
  color:var(--c-ink-2);
}

/* ---------- 对比表 ---------- */
.table-scroll{
  overflow-x:auto;
  border-radius:var(--r-card);
  border:1px solid var(--c-line);
  background:var(--c-surface);
  -webkit-overflow-scrolling:touch;
}
.cmp-table{
  width:100%;
  min-width:720px;
  border-collapse:collapse;
  margin:0;
  font-size:15px;
  background:transparent;
}
.cmp-table caption{
  caption-side:top;
  text-align:left;
  padding:18px 22px 12px;
  font-size:14px;
  color:var(--c-muted);
}
.cmp-table thead th{
  background:var(--c-dark);
  color:#fff;
  font-weight:700;
  font-size:15px;
  text-align:left;
  padding:16px 20px;
  border:none;
  white-space:nowrap;
}
.cmp-table thead th:first-child{border-radius:0}
.cmp-table tbody th,
.cmp-table tbody td{
  padding:15px 20px;
  border-top:1px solid var(--c-line);
  vertical-align:top;
  color:var(--c-ink-2);
}
.cmp-table tbody th{
  font-weight:600;
  color:var(--c-ink);
  background:#FAF9F7;
  width:170px;
  white-space:nowrap;
}
.cmp-table .is-featured{background:#FFF4EE;position:relative}
.cmp-table thead th.is-featured{
  background:var(--c-primary);
  color:#fff;
  box-shadow:inset 0 0 0 1px var(--c-primary);
}
.cmp-table .is-featured strong{color:var(--c-primary-dark)}
.cmp-table tbody tr:hover td,
.cmp-table tbody tr:hover th{background:#FBF7F4}
.cmp-table tbody tr:hover .is-featured{background:#FFEFE6}
.tip{
  display:inline-block;
  margin-left:8px;
  padding:1px 9px;
  border-radius:999px;
  background:rgba(255,255,255,.22);
  border:1px solid rgba(255,255,255,.55);
  font-size:12px;
  font-weight:600;
  vertical-align:2px;
}
.cmp-legend{
  display:flex;flex-wrap:wrap;gap:18px;
  margin-top:18px;
  font-size:14px;
  color:var(--c-muted);
}
.cmp-legend span{display:inline-flex;align-items:center;gap:8px}
.cmp-legend i{width:10px;height:10px;border-radius:3px;display:inline-block}

/* ---------- 侧栏 ---------- */
.sidebar{display:flex;flex-direction:column;gap:22px}
.side-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--shadow-1);
}
.side-card h3{font-size:17px;margin-bottom:16px}
.anchor-nav{display:grid;gap:6px}
.anchor-nav a{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:0 12px;
  border-radius:12px;
  font-size:15px;
  font-weight:600;
  color:var(--c-ink-2);
  border:1px solid transparent;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.anchor-nav a i{color:var(--c-primary);font-size:12px}
.anchor-nav a:hover{background:var(--c-surface-2);color:var(--c-primary);border-color:var(--c-line)}
.side-links{display:grid;gap:14px}
.side-link{
  display:block;
  border:1px solid var(--c-line);
  border-radius:14px;
  padding:16px 18px;
  background:var(--c-bg);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.side-link:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(255,90,30,.4);color:inherit}
.side-link b{display:block;font-size:15.5px;font-weight:700;color:var(--c-ink);margin-bottom:4px}
.side-link span{font-size:13.5px;color:var(--c-muted);line-height:1.7}
.side-link em{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:10px;font-size:13px;font-weight:700;color:var(--c-primary);font-style:normal;
}
.side-cta{
  background:linear-gradient(150deg,var(--c-dark),var(--c-ink-2));
  border:none;
  color:#fff;
}
.side-cta h3{color:#fff}
.side-cta p{font-size:14.5px;color:#B9BFC9;line-height:1.8;margin-bottom:18px}
.side-contact{display:grid;gap:12px;font-size:14.5px;color:var(--c-ink-2)}
.side-contact li{display:flex;align-items:center;gap:10px}
.side-contact i{color:var(--c-primary);width:16px;text-align:center}
.sidebar-sticky{position:sticky;top:calc(var(--header-h) + 24px)}

/* ---------- 横向滚卡 ---------- */
.rail-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.rail-head p{color:var(--c-muted);font-size:15.5px;margin-top:12px;max-width:600px}
.venue-rail{
  display:flex;
  gap:20px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding:6px 4px 22px;
  -webkit-overflow-scrolling:touch;
}
.venue-rail::-webkit-scrollbar{height:6px}
.venue-rail::-webkit-scrollbar-thumb{background:rgba(20,23,26,.18);border-radius:999px}
.venue-card{
  flex:0 0 320px;
  scroll-snap-align:start;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  display:flex;
  flex-direction:column;
}
.venue-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(255,90,30,.35)}
.venue-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.venue-card__body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.venue-card__body h3{font-size:18px}
.venue-card__meta{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 10px;
  border-radius:999px;
  background:var(--c-surface-2);
  color:var(--c-ink-2);
  font-size:12.5px;font-weight:600;
}
.chip-accent{background:rgba(18,214,160,.14);color:#0a7b5d}
.venue-card__body p{font-size:14.5px;color:var(--c-muted);line-height:1.8;margin:0}
.venue-card__foot{
  margin-top:auto;
  padding-top:14px;
  border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:14px;font-weight:700;color:var(--c-ink);
}
.venue-card__foot span{font-variant-numeric:tabular-nums;color:var(--c-muted);font-weight:600}
.venue-rail__hint{font-size:13px;color:var(--c-muted);display:inline-flex;align-items:center;gap:8px}

/* ---------- 相关分类卡 ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.rel-card{
  display:flex;
  flex-direction:column;
  gap:12px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:26px;
  box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(255,90,30,.4);color:inherit}
.rel-card h3{font-size:18px}
.rel-card p{font-size:14.5px;color:var(--c-muted);margin:0}
.rel-card em{
  margin-top:6px;
  font-style:normal;
  font-size:14px;
  font-weight:700;
  color:var(--c-primary);
  display:inline-flex;align-items:center;gap:8px;
}
.rel-card__icon{
  width:44px;height:44px;border-radius:14px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(255,90,30,.1);
  color:var(--c-primary);
  font-size:18px;
}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--c-dark) 0%,#151B24 60%,#1D242E 100%);
  color:#fff;
  padding:76px 0;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-120px;top:-120px;
  width:420px;height:420px;
  border-radius:50%;
  border:1px solid rgba(255,90,30,.28);
  box-shadow:0 0 0 60px rgba(255,90,30,.06);
  pointer-events:none;
}
.cta-inner{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  flex-wrap:wrap;
}
.cta-inner h2{font-size:clamp(24px,3vw,34px);max-width:640px}
.cta-inner p{color:#A8AEB8;margin-top:14px;font-size:16px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- 页脚 ---------- */
.site-footer{background:#0C0F13;color:#A8AEB8;padding:72px 0 0;font-size:14.5px}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:52px;
}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:18px}
.footer-brand .brand-name{color:#fff}
.footer-desc{line-height:1.9;color:#8D949F;max-width:320px}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:18px}
.footer-col ul{display:grid;gap:12px}
.footer-col a{color:#A8AEB8}
.footer-col a:hover{color:var(--c-primary)}
.footer-social{display:flex;gap:12px;margin-top:22px}
.footer-social a{
  width:38px;height:38px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.12);
  color:#C7CCD4;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.footer-social a:hover{background:var(--c-primary);border-color:var(--c-primary);color:#fff;transform:translateY(-2px)}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;color:#A8AEB8}
.footer-contact i{color:var(--c-primary);margin-top:5px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
  font-size:13.5px;
  color:#7E858F;
}
.footer-links{display:flex;flex-wrap:wrap;gap:20px}
.footer-links a{color:#7E858F}
.footer-links a:hover{color:var(--c-primary)}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;
  right:24px;bottom:24px;
  width:48px;height:48px;
  border-radius:50%;
  border:1px solid var(--c-primary);
  background:var(--c-bg);
  color:var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:16px;
  cursor:pointer;
  opacity:0;visibility:hidden;
  transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,background-color .2s ease,color .2s ease;
  z-index:850;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--c-primary);color:#fff}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .container{padding-left:24px;padding-right:24px}
  .section{padding:72px 0}
  .section--tight{padding:56px 0}
  .nav-links{
    position:fixed;
    top:0;right:0;
    width:86%;
    max-width:380px;
    height:100vh;
    background:var(--c-bg);
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:96px 24px 32px;
    transform:translateX(100%);
    transition:transform .3s ease;
    z-index:950;
    box-shadow:-24px 0 48px -24px rgba(16,19,24,.4);
    overflow-y:auto;
  }
  body.nav-open .nav-links{transform:translateX(0)}
  .nav-link{
    height:52px;
    font-size:16px;
    border-bottom:1px solid var(--c-line);
    justify-content:space-between;
  }
  .nav-link::after{display:none}
  .nav-link.is-active{color:var(--c-primary)}
  .nav-link.is-active::before{display:none}
  .nav-link--pill{
    height:48px;
    margin-top:18px;
    border-color:var(--c-line);
    justify-content:center;
  }
  .nav-toggle{display:inline-flex}
  .nav-actions .btn-primary{padding:0 16px;font-size:14px;height:40px}
  .split,.split--rev{grid-template-columns:1fr}
  .sidebar-sticky{position:static}
  .rel-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  body{line-height:1.85}
  .section{padding:56px 0}
  .block{padding:26px 22px}
  .block-head{gap:12px}
  .page-hero__inner{padding:32px 0 48px}
  .hero-facts li{padding-right:18px;margin-right:18px}
  .hero-facts b{font-size:22px}
  .rel-grid{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .venue-card{flex:0 0 260px}
}
@media (max-width:520px){
  .container{padding-left:18px;padding-right:18px}
  .brand-sub{display:none}
  .nav-actions .btn-primary{padding:0 14px;font-size:13.5px;height:38px;min-width:96px}
  .nav-actions .btn-primary i{display:none}
  .footer-grid{grid-template-columns:1fr}
  .hero-facts{gap:16px 0}
  .hero-facts li{border-right:none;margin-right:0;padding-right:0;min-width:45%}
  .btn{width:100%}
  .page-hero__actions .btn,.cta-actions .btn{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}