/* roulang page: index */
:root{
  --ink-900:#05080F;
  --ink-800:#080E1A;
  --ink-700:#0C1526;
  --surface:#101A2E;
  --glass:rgba(16,26,46,.55);
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#16E0A8;
  --brand-deep:#0FB98A;
  --brand-glow:rgba(22,224,168,.35);
  --accent:#FF9A3C;
  --accent-soft:rgba(255,154,60,.14);
  --danger:#FF6B6B;
  --text-hi:#E8EEF7;
  --text:#C3CEDE;
  --text-lo:#7C8AA3;
  --radius:20px;
  --radius-lg:24px;
  --radius-sm:12px;
  --shadow-card:0 20px 60px rgba(0,0,0,.55);
  --container:1240px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--ink-800);
  color:var(--text);
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--brand);}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--text-hi);font-weight:800;letter-spacing:.01em;line-height:1.25;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
::selection{background:var(--brand-glow);color:#04160f;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
@media(min-width:1024px){.container{padding:0 32px;}}

.num{font-variant-numeric:tabular-nums;font-family:Inter,"HarmonyOS Sans SC","PingFang SC",system-ui,sans-serif;letter-spacing:0;}

/* ---------- Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  transition:background .24s var(--ease),border-color .24s var(--ease),backdrop-filter .24s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(8,14,26,.78);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom-color:var(--line);
}
.nav-inner{display:flex;align-items:center;gap:20px;height:72px;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:40px;height:40px;border-radius:12px;flex-shrink:0;
  background:linear-gradient(140deg,rgba(22,224,168,.9),rgba(15,185,138,.35));
  box-shadow:0 8px 24px var(--brand-glow),inset 0 0 0 1px rgba(255,255,255,.18);
  display:flex;align-items:center;justify-content:center;
  color:#04160f;font-weight:800;font-size:15px;letter-spacing:-.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text .l1{color:var(--text-hi);font-weight:800;font-size:15px;letter-spacing:.02em;}
.brand-text .l2{color:var(--text-lo);font-size:11px;letter-spacing:.14em;font-weight:500;}
.nav-links{display:none;align-items:center;gap:4px;margin-left:8px;}
.nav-links a{
  position:relative;padding:8px 12px;border-radius:999px;font-size:14px;font-weight:500;color:var(--text);
}
.nav-links a::after{
  content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%) scaleX(0);
  width:16px;height:2px;border-radius:2px;background:var(--brand);transition:transform .2s var(--ease);
}
.nav-links a:hover{color:var(--brand);}
.nav-links a:hover::after{transform:translateX(-50%) scaleX(1);}
.nav-links a.active{color:var(--brand);}
.nav-links a.active::after{transform:translateX(-50%) scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;font-size:14px;font-weight:600;padding:11px 20px;
  transition:all .2s var(--ease);white-space:nowrap;
}
.btn-primary{
  background:rgba(22,224,168,.12);color:var(--brand);
  box-shadow:0 8px 28px var(--brand-glow),inset 0 0 0 1px rgba(22,224,168,.45);
}
.btn-primary:hover{background:rgba(22,224,168,.2);color:#04160f;background:var(--brand);transform:translateY(-1px);box-shadow:0 10px 34px var(--brand-glow),inset 0 0 0 1px rgba(255,255,255,.2);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 4px 14px var(--brand-glow);}
.btn-ghost{
  background:rgba(255,255,255,.03);color:var(--text);
  box-shadow:inset 0 0 0 1px var(--line);
}
.btn-ghost:hover{background:rgba(255,255,255,.07);box-shadow:inset 0 0 0 1px var(--line-strong);color:var(--text-hi);transform:translateY(-1px);}
.btn-lg{padding:14px 28px;font-size:15px;}
.nav-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:12px;background:rgba(255,255,255,.04);
  box-shadow:inset 0 0 0 1px var(--line);color:var(--text-hi);font-size:16px;
}
.nav-toggle:hover{color:var(--brand);box-shadow:inset 0 0 0 1px var(--line-strong);}
@media(min-width:1024px){
  .nav-links{display:flex;}
  .nav-toggle{display:none;}
  .nav-inner{height:80px;}
}

/* ---------- Drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(3,6,12,.6);backdrop-filter:blur(4px);
  opacity:0;pointer-events:none;transition:opacity .24s var(--ease);z-index:95;
}
.drawer-mask.open{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;z-index:96;
  background:rgba(12,21,38,.92);backdrop-filter:blur(20px) saturate(140%);
  -webkit-backdrop-filter:blur(20px) saturate(140%);
  border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .28s var(--ease);
  display:flex;flex-direction:column;padding:24px 22px 28px;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
.drawer-close{width:38px;height:38px;border-radius:12px;background:rgba(255,255,255,.05);box-shadow:inset 0 0 0 1px var(--line);color:var(--text-hi);}
.drawer-close:hover{color:var(--brand);}
.drawer-nav{display:flex;flex-direction:column;gap:4px;}
.drawer-nav a{padding:13px 14px;border-radius:12px;font-size:15px;font-weight:500;color:var(--text);}
.drawer-nav a:hover,.drawer-nav a.active{background:rgba(22,224,168,.1);color:var(--brand);}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px;padding-top:24px;border-top:1px solid var(--line);}
.drawer-foot .btn{width:100%;}

/* ---------- Section base ---------- */
.section{padding:56px 0;}
@media(min-width:1024px){.section{padding:104px 0;}}
.section-alt{background:var(--ink-700);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;
  color:var(--brand);letter-spacing:.08em;padding:6px 12px;border-radius:999px;
  background:rgba(22,224,168,.08);box-shadow:inset 0 0 0 1px rgba(22,224,168,.28);
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand);}
.h2{font-size:clamp(22px,3vw,32px);}
.section-desc{font-size:14px;color:var(--text-lo);max-width:640px;margin-top:10px;line-height:1.8;}
.link-more{font-size:14px;font-weight:600;color:var(--text-lo);display:inline-flex;align-items:center;gap:6px;white-space:nowrap;}
.link-more:hover{color:var(--brand);}

/* ---------- Hero ---------- */
.hero{
  position:relative;padding:112px 0 56px;
  background:var(--ink-800);
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:40px 40px;
  mask-image:radial-gradient(circle at 30% 30%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 30% 30%,#000 0%,transparent 78%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;right:-160px;bottom:-220px;width:620px;height:620px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,224,168,.14),transparent 68%);
  pointer-events:none;
}
.hero-beam{
  position:absolute;top:-10%;left:52%;width:520px;height:130%;
  background:linear-gradient(100deg,rgba(22,224,168,0),rgba(22,224,168,.10),rgba(22,224,168,0));
  transform:rotate(14deg);pointer-events:none;filter:blur(6px);
}
@media(min-width:1024px){.hero{padding:150px 0 96px;}}
.hero-grid{position:relative;display:grid;gap:40px;align-items:center;}
@media(min-width:1024px){
  .hero-grid{grid-template-columns:320px 1fr;gap:64px;}
}
@media(min-width:1280px){
  .hero-grid{grid-template-columns:340px 1fr;gap:72px;}
}
.screen-card{
  position:relative;width:100%;max-width:300px;margin:0 auto;
  aspect-ratio:9/16;border-radius:var(--radius-lg);overflow:hidden;
  background:var(--surface);
  box-shadow:var(--shadow-card),inset 0 0 0 1px rgba(255,255,255,.06);
}
@media(min-width:640px){.screen-card{max-width:260px;}}
@media(min-width:1024px){.screen-card{max-width:100%;}}
.screen-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
.screen-card .scan{
  position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.05) 0 1px,transparent 1px 4px);
  mix-blend-mode:overlay;
}
.screen-card .shade{
  position:absolute;inset:0;background:linear-gradient(to top,rgba(5,8,15,.94) 6%,rgba(5,8,15,.35) 48%,rgba(5,8,15,.1) 100%);
}
.play-btn{
  position:absolute;left:50%;top:42%;transform:translate(-50%,-50%);
  width:62px;height:62px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:rgba(5,8,15,.55);backdrop-filter:blur(10px);
  box-shadow:0 0 0 1px rgba(255,255,255,.22),0 10px 34px rgba(0,0,0,.5);
  color:var(--brand);font-size:20px;transition:all .22s var(--ease);
}
.screen-card:hover .play-btn{background:var(--brand);color:#04160f;box-shadow:0 10px 34px var(--brand-glow);}
.duration-badge{
  position:absolute;top:14px;right:14px;padding:5px 10px;border-radius:999px;
  background:rgba(5,8,15,.68);backdrop-filter:blur(8px);
  font-size:12px;font-weight:600;color:var(--text-hi);
  box-shadow:inset 0 0 0 1px var(--line-strong);
}
.screen-caption{position:absolute;left:18px;right:18px;bottom:20px;}
.screen-caption .t1{font-size:17px;font-weight:800;color:var(--text-hi);line-height:1.35;}
.screen-caption .t2{font-size:13px;color:var(--text);margin-top:6px;}
.hero-copy h1{
  font-size:clamp(28px,4.2vw,50px);line-height:1.15;letter-spacing:.01em;margin-top:18px;
}
.hero-sub{margin-top:18px;font-size:16px;line-height:1.85;color:var(--text);max-width:600px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.stat-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px;}
.stat-pill{
  flex:1 1 150px;padding:14px 16px;border-radius:var(--radius-sm);
  background:var(--glass);backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:inset 0 0 0 1px var(--line);
}
.stat-pill .v{font-size:22px;font-weight:800;color:var(--brand);}
.stat-pill .k{font-size:13px;color:var(--text-lo);margin-top:2px;}

/* ---------- Reel strip ---------- */
.reel{
  display:flex;gap:20px;overflow-x:auto;padding:6px 20px 22px;margin:0 -20px;
  scroll-snap-type:x mandatory;scrollbar-width:thin;-webkit-overflow-scrolling:touch;
}
@media(min-width:1024px){.reel{padding:6px 32px 24px;margin:0 -32px;}}
.reel::-webkit-scrollbar{height:6px;}
.reel::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:999px;}
.reel-item{
  flex:0 0 auto;width:240px;scroll-snap-align:start;
  border-radius:var(--radius-lg);overflow:hidden;position:relative;aspect-ratio:9/16;
  background:var(--surface);box-shadow:var(--shadow-card),inset 0 0 0 1px rgba(255,255,255,.06);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
@media(min-width:640px){.reel-item{width:270px;}}
.reel-item img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.reel-item:hover{transform:translateY(-6px);box-shadow:var(--shadow-card),inset 0 0 0 1px rgba(22,224,168,.5);}
.reel-item:hover img{transform:scale(1.04);}
.reel-item .grad{position:absolute;inset:0;background:linear-gradient(to top,rgba(5,8,15,.92) 8%,rgba(5,8,15,.2) 52%,rgba(5,8,15,.05) 100%);}
.reel-item .meta{position:absolute;left:16px;right:16px;bottom:16px;}
.reel-item .rt{font-size:15px;font-weight:700;color:var(--text-hi);line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.reel-item .rp{display:flex;align-items:center;gap:10px;margin-top:8px;font-size:12px;color:var(--text);}
.reel-item .tag{
  position:absolute;left:14px;top:14px;font-size:12px;font-weight:600;padding:5px 10px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent);box-shadow:inset 0 0 0 1px rgba(255,154,60,.35);
}

/* ---------- Pick list ---------- */
.pick-row{
  display:grid;gap:20px;padding:20px;border-radius:var(--radius);background:var(--glass);
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--shadow-card),inset 0 0 0 1px var(--line);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
  align-items:center;
}
.pick-row + .pick-row{margin-top:16px;}
.pick-row:hover{transform:translateY(-4px);box-shadow:var(--shadow-card),inset 0 0 0 1px rgba(22,224,168,.4);}
@media(min-width:768px){
  .pick-row{grid-template-columns:200px 1fr auto;gap:28px;}
  .pick-row.flip .pick-thumb{order:3;}
  .pick-row.flip .pick-body{order:2;}
  .pick-row.flip .pick-no{order:1;text-align:left;}
}
.pick-thumb{
  width:100%;aspect-ratio:4/5;max-width:180px;border-radius:var(--radius-sm);overflow:hidden;background:var(--ink-700);
  box-shadow:inset 0 0 0 1px var(--line);
}
.pick-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.pick-row:hover .pick-thumb img{transform:scale(1.04);}
.pick-no{
  font-size:38px;font-weight:800;line-height:1;color:transparent;
  -webkit-text-stroke:1px rgba(22,224,168,.45);letter-spacing:.02em;
}
.pick-body h3{font-size:18px;font-weight:700;color:var(--text-hi);}
.pick-body h3:hover{color:var(--brand);}
.pick-body p{font-size:14px;color:var(--text-lo);margin-top:8px;line-height:1.75;}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}
.chip{
  font-size:12px;font-weight:600;padding:5px 11px;border-radius:999px;color:var(--text);
  background:rgba(255,255,255,.04);box-shadow:inset 0 0 0 1px var(--line);
}
.chip-accent{color:var(--accent);background:var(--accent-soft);box-shadow:inset 0 0 0 1px rgba(255,154,60,.3);}
.chip-brand{color:var(--brand);background:rgba(22,224,168,.08);box-shadow:inset 0 0 0 1px rgba(22,224,168,.3);}

/* ---------- News / CMS list ---------- */
.news-grid{display:grid;gap:20px;grid-template-columns:1fr;}
@media(min-width:768px){.news-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr);}}
.news-card{
  display:flex;flex-direction:column;border-radius:var(--radius);overflow:hidden;
  background:var(--surface);box-shadow:var(--shadow-card),inset 0 0 0 1px var(--line);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.news-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-card),inset 0 0 0 1px rgba(22,224,168,.42);}
.news-cover{position:relative;aspect-ratio:16/9;background:var(--ink-700);overflow:hidden;}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.news-card:hover .news-cover img{transform:scale(1.03);}
.news-badge{
  position:absolute;left:12px;top:12px;font-size:12px;font-weight:600;padding:5px 11px;border-radius:999px;
  background:rgba(5,8,15,.7);backdrop-filter:blur(8px);color:var(--brand);
  box-shadow:inset 0 0 0 1px rgba(22,224,168,.35);
}
.news-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1;}
.news-body h3{
  font-size:17px;font-weight:700;color:var(--text-hi);line-height:1.45;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card:hover h3{color:var(--brand);}
.news-body .ex{
  font-size:14px;color:var(--text-lo);margin-top:10px;line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:16px;font-size:12px;color:var(--text-lo);
}
.news-card.feature{grid-column:1/-1;}
@media(min-width:1024px){
  .news-card.feature{grid-column:span 2;grid-row:span 1;}
  .news-card.feature .news-cover{aspect-ratio:16/9;}
  .news-card.feature .news-body h3{font-size:20px;-webkit-line-clamp:3;}
}
.empty-state{
  grid-column:1/-1;padding:48px 24px;text-align:center;border-radius:var(--radius);
  background:rgba(255,255,255,.02);border:1px dashed var(--line-strong);
}
.empty-state .ico{font-size:28px;color:var(--text-lo);}
.empty-state p{margin-top:12px;font-size:14px;color:var(--text-lo);}

/* ---------- Reviews ---------- */
.review-track{display:flex;gap:18px;overflow-x:auto;padding:6px 4px 18px;}
.review-card{
  flex:0 0 auto;width:280px;padding:20px;border-radius:var(--radius);
  background:var(--glass);backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:inset 0 0 0 1px var(--line);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.review-card:hover{transform:translateY(-4px);box-shadow:inset 0 0 0 1px var(--line-strong);}
.avatar{
  width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:15px;color:#04160f;background:linear-gradient(140deg,var(--brand),var(--brand-deep));
}
.stars{color:var(--accent);font-size:13px;letter-spacing:2px;}
.review-card p.txt{font-size:14px;color:var(--text);margin-top:12px;line-height:1.8;}
.review-src{font-size:12px;color:var(--text-lo);margin-top:14px;}

/* ---------- Sticky bar ---------- */
.follow-bar{
  position:relative;margin-top:8px;padding:20px 22px;border-radius:var(--radius);
  background:var(--glass);backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--shadow-card),inset 0 0 0 1px var(--line);
  display:flex;flex-wrap:wrap;align-items:center;gap:18px;justify-content:space-between;
}
.follow-bar .txt{font-size:15px;font-weight:600;color:var(--text-hi);}
.follow-bar .sub{font-size:13px;color:var(--text-lo);margin-top:4px;}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  border-radius:var(--radius);background:var(--glass);
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:inset 0 0 0 1px var(--line);overflow:hidden;transition:box-shadow .22s var(--ease);
}
.faq-item.open{box-shadow:inset 0 0 0 1px rgba(22,224,168,.4);}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;text-align:left;
  padding:18px 20px;font-size:15px;font-weight:600;color:var(--text-hi);
  border-left:3px solid transparent;transition:border-color .22s var(--ease),color .18s var(--ease);
}
.faq-item.open .faq-q{border-left-color:var(--brand);color:var(--brand);}
.faq-q .plus{margin-left:auto;font-size:18px;color:var(--text-lo);transition:transform .24s var(--ease),color .2s var(--ease);}
.faq-item.open .faq-q .plus{transform:rotate(45deg);color:var(--brand);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);}
.faq-a p{padding:0 20px 20px 23px;font-size:14px;color:var(--text-lo);line-height:1.85;}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;padding:48px 28px;text-align:center;
  background-image:linear-gradient(rgba(5,8,15,.72),rgba(5,8,15,.86)),url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
  box-shadow:var(--shadow-card),inset 0 0 0 1px var(--line);
}
@media(min-width:1024px){.cta-band{padding:72px 56px;}}
.cta-band h2{font-size:clamp(22px,3vw,32px);}
.cta-band p{font-size:15px;color:var(--text);margin-top:14px;}
.cta-band .row{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:28px;}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--ink-900);border-top:1px solid var(--line);position:relative;margin-top:8px;
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:40px 40px;
}
.footer-inner{position:relative;padding:56px 0 0;}
.footer-grid{display:grid;gap:36px;grid-template-columns:1fr;}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:48px;}}
.footer-brand .fb-name{font-size:17px;font-weight:800;color:var(--text-hi);}
.footer-brand p{font-size:14px;color:var(--text-lo);margin-top:12px;line-height:1.85;max-width:340px;}
.social-row{display:flex;gap:10px;margin-top:20px;}
.social-row a{
  width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.04);box-shadow:inset 0 0 0 1px var(--line);color:var(--text-lo);font-size:14px;
}
.social-row a:hover{color:var(--brand);box-shadow:inset 0 0 0 1px rgba(22,224,168,.4);transform:translateY(-2px);}
.footer-col h4{font-size:14px;font-weight:700;color:var(--text-hi);letter-spacing:.04em;}
.footer-col ul{margin-top:16px;display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--text-lo);display:inline-block;transition:transform .18s var(--ease),color .18s var(--ease);}
.footer-col a:hover{color:var(--brand);transform:translateX(2px);}
.footer-bottom{
  position:relative;margin-top:48px;padding:20px 0 28px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-lo);
}
.footer-bottom .links{display:flex;flex-wrap:wrap;gap:18px;}

/* ---------- Back to top ---------- */
.to-top{
  position:fixed;right:18px;bottom:22px;z-index:80;
  width:46px;height:46px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--glass);backdrop-filter:blur(18px);
  box-shadow:inset 0 0 0 1px var(--line-strong),0 12px 30px rgba(0,0,0,.45);
  color:var(--text-hi);opacity:0;pointer-events:none;transition:all .24s var(--ease);
}
.to-top.show{opacity:1;pointer-events:auto;}
.to-top:hover{color:#04160f;background:var(--brand);box-shadow:0 12px 34px var(--brand-glow);}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.in{opacity:1;transform:none;}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: article */
:root{
  --ink-900:#05080F;
  --ink-800:#080E1A;
  --ink-700:#0C1526;
  --surface:#101A2E;
  --glass:rgba(16,26,46,.55);
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#16E0A8;
  --brand-deep:#0FB98A;
  --brand-glow:rgba(22,224,168,.35);
  --accent:#FF9A3C;
  --accent-soft:rgba(255,154,60,.14);
  --danger:#FF6B6B;
  --text-hi:#E8EEF7;
  --text:#C3CEDE;
  --text-lo:#7C8AA3;
  --radius:20px;
  --radius-lg:24px;
  --radius-sm:12px;
  --shadow:0 20px 60px rgba(0,0,0,.55), inset 0 0 0 1px rgba(255,255,255,.06);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--ink-800);
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:40px 40px;
  color:var(--text);
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
h1,h2,h3,h4{margin:0;font-weight:800;color:var(--text-hi);letter-spacing:.01em;line-height:1.25;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.num{font-variant-numeric:tabular-nums;font-family:Inter,"HarmonyOS Sans SC",system-ui,sans-serif;}

header .container,main .container,footer .container{
  width:100%;
  max-width:1240px;
  margin-inline:auto;
  padding-inline:20px;
}
@media (min-width:1024px){
  header .container,main .container,footer .container{padding-inline:32px;}
}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:transparent;
  transition:background 240ms var(--ease),border-color 240ms var(--ease),backdrop-filter 240ms var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-stuck{
  background:rgba(8,14,26,.72);
  backdrop-filter:blur(18px) saturate(140%);
  border-bottom-color:var(--line);
}
.nav-inner{display:flex;align-items:center;gap:24px;height:74px;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:42px;height:42px;border-radius:14px;
  display:grid;place-items:center;
  font-weight:800;font-size:15px;letter-spacing:.04em;
  color:#04140F;
  background:linear-gradient(140deg,var(--brand),#6BF3CD);
  box-shadow:0 8px 24px var(--brand-glow),inset 0 0 0 1px rgba(255,255,255,.25);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text .l1{font-size:16px;font-weight:800;color:var(--text-hi);letter-spacing:.02em;}
.brand-text .l2{font-size:12px;color:var(--text-lo);letter-spacing:.14em;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav-links a{
  position:relative;
  padding:9px 12px;
  font-size:15px;font-weight:500;
  color:var(--text);
  border-radius:999px;
  transition:color 160ms var(--ease),background 160ms var(--ease);
}
.nav-links a:hover{color:var(--brand);background:rgba(22,224,168,.07);}
.nav-links a.active{color:var(--brand);}
.nav-links a.active::after{
  content:"";position:absolute;left:50%;bottom:1px;transform:translateX(-50%);
  width:4px;height:4px;border-radius:50%;background:var(--brand);
  box-shadow:0 0 10px var(--brand-glow);
}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:999px;
  font-size:14px;font-weight:600;
  transition:transform 200ms var(--ease),box-shadow 200ms var(--ease),background 200ms var(--ease),border-color 200ms var(--ease),color 200ms var(--ease);
  white-space:nowrap;
}
.btn-primary{
  color:var(--brand);
  background:rgba(22,224,168,.12);
  border:1px solid rgba(22,224,168,.42);
  box-shadow:0 8px 28px var(--brand-glow);
}
.btn-primary:hover{background:rgba(22,224,168,.2);border-color:var(--brand);transform:translateY(-1px);box-shadow:0 10px 34px var(--brand-glow);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 4px 16px var(--brand-glow);}
.btn-ghost{
  color:var(--text);
  background:rgba(16,26,46,.5);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
}
.btn-ghost:hover{color:var(--text-hi);border-color:var(--line-strong);background:rgba(16,26,46,.68);}
.btn-lg{padding:14px 30px;font-size:15px;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line);background:rgba(16,26,46,.6);
  color:var(--text-hi);align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:var(--line-strong);color:var(--brand);}

/* drawer */
.drawer-mask{
  position:fixed;inset:0;background:rgba(5,8,15,.6);
  opacity:0;visibility:hidden;transition:opacity 220ms var(--ease),visibility 220ms var(--ease);
  z-index:80;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.nav-drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;
  z-index:90;
  transform:translateX(102%);
  transition:transform 260ms var(--ease);
  background:rgba(9,15,28,.86);
  backdrop-filter:blur(20px) saturate(140%);
  border-left:1px solid var(--line);
  padding:22px 20px;
  display:flex;flex-direction:column;gap:18px;
  overflow-y:auto;
}
.nav-drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{width:38px;height:38px;border-radius:12px;border:1px solid var(--line);color:var(--text);}
.drawer-links{display:flex;flex-direction:column;gap:4px;}
.drawer-links a{padding:12px 14px;border-radius:14px;font-size:15px;color:var(--text);border:1px solid transparent;}
.drawer-links a:hover,.drawer-links a.active{color:var(--brand);background:rgba(22,224,168,.08);border-color:rgba(22,224,168,.24);}
.drawer-cta{margin-top:auto;width:100%;}

/* ---------- progress ---------- */
.progress-track{position:fixed;top:0;left:0;right:0;height:2px;z-index:100;background:transparent;pointer-events:none;}
.progress-bar{height:100%;width:0;background:linear-gradient(90deg,var(--brand),var(--accent));box-shadow:0 0 14px var(--brand-glow);transition:width 90ms linear;}

/* ---------- article hero ---------- */
.article-hero{
  position:relative;
  padding:52px 0 44px;
  background-image:linear-gradient(rgba(5,8,15,.82),rgba(5,8,15,.92)),url(/assets/images/backpic/back-2.png);
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.article-hero::after{
  content:"";position:absolute;right:-120px;bottom:-160px;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,224,168,.14),transparent 68%);
  pointer-events:none;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-lo);margin-bottom:18px;}
.breadcrumb a{color:var(--text-lo);transition:color 160ms var(--ease);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:rgba(255,255,255,.22);}
.breadcrumb .now{color:var(--brand);}
.article-title{
  font-size:clamp(28px,3.6vw,44px);
  line-height:1.2;
  max-width:900px;
  margin-bottom:22px;
}
.meta-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  padding:12px 16px;border-radius:16px;
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(140%);
  font-size:13px;color:var(--text-lo);
  width:fit-content;max-width:100%;
}
.meta-bar .dot-sep{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.2);}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.02em;
  border:1px solid rgba(22,224,168,.34);
  background:rgba(22,224,168,.12);
  color:var(--brand);
}
.badge-accent{border-color:rgba(255,154,60,.36);background:var(--accent-soft);color:var(--accent);}
.badge-muted{border-color:var(--line);background:rgba(255,255,255,.04);color:var(--text-lo);}

/* ---------- layout ---------- */
.article-main{padding:56px 0 72px;}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start;}
.article-card{
  background:linear-gradient(180deg,rgba(16,26,46,.72),rgba(12,21,38,.6));
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
  padding:36px 40px 32px;
}
@media (min-width:1024px){.article-card{padding:44px 48px 36px;}}

/* article body typography */
.article-body{font-size:17px;line-height:1.9;color:var(--text);max-width:780px;}
.article-body > * + *{margin-top:0;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  position:relative;
  font-size:clamp(21px,2.2vw,26px);
  color:var(--text-hi);
  margin:40px 0 16px;
  padding-left:16px;
  scroll-margin-top:100px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;width:4px;height:.92em;border-radius:2px;background:var(--brand);
  box-shadow:0 0 12px var(--brand-glow);
}
.article-body h3{
  font-size:20px;color:var(--text-hi);
  margin:28px 0 12px;font-weight:700;
}
.article-body h3::before{
  content:"";display:inline-block;width:8px;height:8px;border-radius:2px;background:var(--brand);margin-right:10px;vertical-align:middle;
}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.5em;list-style:revert;}
.article-body ul li,.article-body ol li{margin:6px 0;}
.article-body ul li::marker{color:var(--brand);}
.article-body ol li::marker{color:var(--brand);font-weight:700;}
.article-body blockquote{
  margin:24px 0;padding:16px 22px;
  border-left:3px solid var(--accent);
  border-radius:12px;
  background:var(--glass);
  color:var(--text-hi);
}
.article-body img{border-radius:16px;margin:22px auto;width:auto;max-width:100%;}
.article-body figure{margin:24px 0;}
.article-body figcaption{font-size:13px;color:var(--text-lo);text-align:center;margin-top:10px;}
.article-body a{color:var(--brand);text-decoration:underline dashed;text-underline-offset:3px;transition:color 160ms var(--ease);}
.article-body a:hover{color:var(--brand-deep);text-decoration-style:solid;}
.article-body table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;
  border:1px solid var(--line);border-radius:12px;overflow:hidden;display:block;overflow-x:auto;
}
.article-body thead{background:rgba(255,255,255,.06);}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap;}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.02);}
.article-body code{background:rgba(22,224,168,.1);color:var(--brand);padding:2px 7px;border-radius:6px;font-size:.92em;}
.article-body hr{border:0;height:1px;background:var(--line);margin:32px 0;}
.article-body strong{color:var(--text-hi);}

.empty-state{
  border:1px dashed rgba(255,255,255,.18);
  border-radius:var(--radius);
  background:rgba(16,26,46,.45);
  padding:48px 28px;text-align:center;
}
.empty-icon{
  width:64px;height:64px;margin:0 auto 18px;border-radius:18px;
  display:grid;place-items:center;font-size:24px;color:var(--brand);
  background:rgba(22,224,168,.1);border:1px solid rgba(22,224,168,.28);
}
.empty-state h2{font-size:22px;margin-bottom:10px;}
.empty-state p{color:var(--text-lo);font-size:15px;max-width:460px;margin:0 auto 22px;}

/* meta after body */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:36px;padding-top:26px;border-top:1px solid var(--line);}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;
  font-size:13px;color:var(--text);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  transition:color 180ms var(--ease),border-color 180ms var(--ease),transform 180ms var(--ease);
}
.tag:hover{color:var(--brand);border-color:rgba(22,224,168,.4);transform:translateY(-2px);}
.action-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;}
.chip-btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 20px;border-radius:999px;
  font-size:14px;color:var(--text);
  background:rgba(16,26,46,.6);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  transition:color 180ms var(--ease),border-color 180ms var(--ease),background 180ms var(--ease),transform 180ms var(--ease);
}
.chip-btn:hover{color:var(--brand);border-color:rgba(22,224,168,.4);transform:translateY(-1px);}
.chip-btn.is-active{color:var(--brand);border-color:var(--brand);background:rgba(22,224,168,.12);box-shadow:0 8px 26px var(--brand-glow);}

/* ---------- sidebar ---------- */
.sidebar{display:flex;flex-direction:column;gap:20px;position:sticky;top:96px;}
.side-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px;
  backdrop-filter:blur(18px) saturate(140%);
  box-shadow:0 16px 40px rgba(0,0,0,.4);
}
.side-title{
  display:flex;align-items:center;gap:8px;
  font-size:15px;font-weight:800;color:var(--text-hi);
  margin-bottom:14px;
}
.side-title i{color:var(--brand);font-size:13px;}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:block;padding:8px 12px;
  font-size:13.5px;color:var(--text-lo);
  border-left:2px solid transparent;border-radius:0 8px 8px 0;
  transition:color 160ms var(--ease),border-color 160ms var(--ease),background 160ms var(--ease);
}
.toc-list a:hover{color:var(--text-hi);background:rgba(255,255,255,.04);}
.toc-list a.current{color:var(--brand);border-left-color:var(--brand);background:rgba(22,224,168,.08);}
.toc-empty{font-size:13px;color:var(--text-lo);}
.mini-post{display:flex;gap:12px;padding:10px 0;border-bottom:1px solid var(--line);}
.mini-post:last-child{border-bottom:0;padding-bottom:0;}
.mini-post:first-child{padding-top:0;}
.mini-thumb{
  width:72px;height:54px;flex-shrink:0;border-radius:10px;overflow:hidden;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
}
.mini-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 260ms var(--ease);}
.mini-post:hover .mini-thumb img{transform:scale(1.06);}
.mini-post h4{font-size:14px;font-weight:600;color:var(--text);line-height:1.5;transition:color 160ms var(--ease);}
.mini-post:hover h4{color:var(--brand);}
.mini-post span{font-size:12px;color:var(--text-lo);}
.side-cta{
  background:linear-gradient(150deg,rgba(22,224,168,.16),rgba(16,26,46,.7));
  border:1px solid rgba(22,224,168,.3);
  border-radius:var(--radius);
  padding:24px;
  text-align:center;
  box-shadow:0 18px 44px rgba(0,0,0,.45);
}
.side-cta h4{font-size:17px;margin-bottom:8px;}
.side-cta p{font-size:13px;color:var(--text-lo);margin-bottom:16px;}
.side-cta .btn{width:100%;}

/* ---------- prev / next ---------- */
.prevnext{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:44px;}
.pn-card{
  display:flex;flex-direction:column;gap:8px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;backdrop-filter:blur(18px);
  transition:transform 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.pn-card:hover{transform:translateY(-4px);border-color:rgba(22,224,168,.4);box-shadow:0 22px 50px rgba(0,0,0,.5);}
.pn-label{font-size:12px;color:var(--text-lo);letter-spacing:.08em;}
.pn-card h4{font-size:16px;font-weight:700;color:var(--text-hi);line-height:1.55;}
.pn-card:hover h4{color:var(--brand);}

/* ---------- related ---------- */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin:64px 0 24px;}
.section-head h2{font-size:clamp(22px,2.4vw,30px);}
.section-head .more{font-size:14px;color:var(--text-lo);transition:color 160ms var(--ease);}
.section-head .more:hover{color:var(--brand);}
.related-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:22px;}
.rel-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  transition:transform 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.rel-card:hover{transform:translateY(-5px);border-color:rgba(22,224,168,.42);box-shadow:0 24px 52px rgba(0,0,0,.55);}
.rel-thumb{position:relative;width:100%;aspect-ratio:16/9;overflow:hidden;background:rgba(255,255,255,.05);}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 320ms var(--ease);}
.rel-card:hover .rel-thumb img{transform:scale(1.03);}
.rel-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rel-body h3{font-size:17px;font-weight:700;color:var(--text-hi);line-height:1.5;}
.rel-card:hover .rel-body h3{color:var(--brand);}
.rel-body p{font-size:13.5px;color:var(--text-lo);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rel-meta{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--text-lo);margin-top:auto;}

.back-line{display:flex;align-items:center;gap:10px;margin-top:36px;font-size:14px;color:var(--text-lo);transition:color 160ms var(--ease);width:fit-content;}
.back-line:hover{color:var(--brand);}
.back-line i{transition:transform 200ms var(--ease);}
.back-line:hover i{transform:translateX(-4px);}

/* ---------- faq ---------- */
.faq-section{padding:0 0 80px;}
.faq-wrap{max-width:900px;margin:0 auto;display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--glass);border:1px solid var(--line);border-radius:16px;
  backdrop-filter:blur(18px);overflow:hidden;
  transition:border-color 200ms var(--ease);
}
.faq-item.open{border-color:rgba(22,224,168,.36);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;text-align:left;font-size:16px;font-weight:600;color:var(--text-hi);
  position:relative;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:0 3px 3px 0;
  background:rgba(255,255,255,.14);transition:background 200ms var(--ease),box-shadow 200ms var(--ease);
}
.faq-item.open .faq-q::before{background:var(--brand);box-shadow:0 0 12px var(--brand-glow);}
.faq-q i{font-size:15px;color:var(--text-lo);transition:transform 240ms var(--ease),color 200ms var(--ease);flex-shrink:0;}
.faq-item.open .faq-q i{transform:rotate(45deg);color:var(--brand);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 300ms var(--ease);}
.faq-a p{padding:0 22px 20px;font-size:15px;color:var(--text-lo);}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;
  padding:64px 0;
  background-image:linear-gradient(rgba(5,8,15,.78),rgba(5,8,15,.9)),url(/assets/images/backpic/back-3.webp);
  background-size:cover;background-position:center;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:34px 36px;backdrop-filter:blur(18px) saturate(140%);
}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:8px;}
.cta-inner p{font-size:15px;color:var(--text-lo);}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:64px 0 0;position:relative;}
.site-footer::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px);
  background-size:40px 40px;pointer-events:none;
}
.footer-inner{position:relative;z-index:1;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px;}
.fb-name{font-size:17px;font-weight:800;color:var(--text-hi);margin-bottom:12px;}
.footer-brand p{font-size:13.5px;color:var(--text-lo);max-width:340px;line-height:1.85;}
.social-row{display:flex;gap:12px;margin-top:18px;}
.social-row a{
  width:38px;height:38px;border-radius:50%;
  display:grid;place-items:center;
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  color:var(--text-lo);font-size:14px;
  transition:color 180ms var(--ease),border-color 180ms var(--ease),transform 180ms var(--ease);
}
.social-row a:hover{color:var(--brand);border-color:rgba(22,224,168,.4);transform:translateY(-2px);}
.footer-col h4{font-size:14px;color:var(--text-hi);margin-bottom:16px;letter-spacing:.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:13.5px;color:var(--text-lo);transition:color 180ms var(--ease),transform 180ms var(--ease);display:inline-block;}
.footer-col a:hover{color:var(--brand);transform:translateX(2px);}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  padding:20px 0 26px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--text-lo);
}
.footer-bottom .links{display:flex;flex-wrap:wrap;gap:18px;}
.footer-bottom .links a{color:var(--text-lo);transition:color 160ms var(--ease);}
.footer-bottom .links a:hover{color:var(--brand);}

/* back to top */
.back-top{
  position:fixed;right:22px;bottom:26px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;
  color:var(--text);background:rgba(16,26,46,.72);
  border:1px solid var(--line);backdrop-filter:blur(16px);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 220ms var(--ease),color 200ms var(--ease),border-color 200ms var(--ease);
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{color:var(--brand);border-color:rgba(22,224,168,.5);}

/* reveal */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 520ms var(--ease),transform 520ms var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:32px;}
  .related-grid{grid-template-columns:1fr 1fr;}
  .related-grid .rel-card:first-child{grid-column:span 2;}
}
@media (max-width:1023px){
  .nav-links{display:none;}
  .nav-toggle{display:inline-flex;}
  .article-layout{grid-template-columns:1fr;gap:36px;}
  .sidebar{position:static;}
  .article-card{padding:28px 22px 26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  .nav-actions .btn-ghost{display:none;}
  .cta-inner{padding:26px 22px;}
  .prevnext{grid-template-columns:1fr;}
  .related-grid{grid-template-columns:1fr;}
  .related-grid .rel-card:first-child{grid-column:span 1;}
  .article-body{font-size:16.5px;}
  .back-top{right:16px;bottom:18px;}
}
@media (max-width:520px){
  .brand-text .l2{display:none;}
  .nav-inner{height:66px;gap:12px;}
  .nav-actions .btn-primary{padding:9px 16px;font-size:13px;}
  .meta-bar{font-size:12px;gap:8px;}
  .footer-grid{grid-template-columns:1fr;}
  .article-hero{padding:36px 0 32px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1;justify-content:center;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category1 */
:root{
  --ink-900:#05080F; --ink-800:#080E1A; --ink-700:#0C1526; --surface:#101A2E;
  --glass:rgba(16,26,46,.55);
  --line:rgba(255,255,255,.08); --line-strong:rgba(255,255,255,.16);
  --brand:#16E0A8; --brand-deep:#0FB98A; --brand-glow:rgba(22,224,168,.35);
  --accent:#FF9A3C; --accent-soft:rgba(255,154,60,.14);
  --danger:#FF6B6B;
  --text-hi:#E8EEF7; --text:#C3CEDE; --text-lo:#7C8AA3;
  --r-card:20px; --r-lg:24px; --r-sm:12px; --r-pill:999px;
  --shadow-card:0 20px 60px rgba(0,0,0,.55), inset 0 0 0 1px rgba(255,255,255,.06);
  --shadow-soft:0 10px 30px rgba(0,0,0,.38);
  --ease:cubic-bezier(.2,.7,.3,1);
  --gap-section:96px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-800);
  color:var(--text);
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size:40px 40px, 40px 40px;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease), transform .18s var(--ease);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
h1,h2,h3,h4{margin:0;color:var(--text-hi);font-weight:800;letter-spacing:.01em;line-height:1.25;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";font-family:"Inter","HarmonyOS Sans SC",system-ui,sans-serif;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;}
@media (min-width:1024px){ .container{padding:0 32px;} }

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(8,14,26,.72);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid transparent;
  transition:background-color .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(5,8,15,.86);
  border-bottom-color:var(--line);
  box-shadow:0 12px 30px rgba(0,0,0,.45);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:74px;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:42px;height:42px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand) 0%,var(--brand-deep) 100%);
  color:#04140F;font-weight:800;font-size:15px;letter-spacing:.02em;
  box-shadow:0 8px 24px var(--brand-glow), inset 0 0 0 1px rgba(255,255,255,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text .l1{color:var(--text-hi);font-weight:800;font-size:15px;letter-spacing:.02em;}
.brand-text .l2{color:var(--text-lo);font-size:11.5px;letter-spacing:.14em;}
.nav-links{display:flex;align-items:center;gap:26px;}
.nav-links a{
  position:relative;color:var(--text-lo);font-size:15px;font-weight:500;padding:6px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand);
  border-radius:2px;transition:width .2s var(--ease);
}
.nav-links a:hover{color:var(--text-hi);}
.nav-links a:hover::after{width:100%;}
.nav-links a.active{color:var(--brand);}
.nav-links a.active::after{width:16px;}
.nav-links a.active::before{
  content:"";position:absolute;left:-11px;top:50%;width:4px;height:4px;border-radius:50%;
  background:var(--brand);transform:translateY(-50%);box-shadow:0 0 10px var(--brand-glow);
}
.nav-actions{display:flex;align-items:center;gap:10px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);font-size:14.5px;font-weight:600;
  padding:11px 22px;border:1px solid transparent;white-space:nowrap;
  transition:background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}
.btn-primary{
  color:var(--brand);
  background:rgba(22,224,168,.12);
  border-color:rgba(22,224,168,.45);
  box-shadow:0 8px 28px var(--brand-glow);
}
.btn-primary:hover{background:rgba(22,224,168,.2);transform:translateY(-1px);box-shadow:0 10px 34px var(--brand-glow);color:#EAFFF8;}
.btn-primary:active{transform:translateY(1px);box-shadow:0 4px 14px var(--brand-glow);}
.btn-ghost{
  color:var(--text);background:var(--glass);border-color:var(--line);
  backdrop-filter:blur(18px) saturate(140%);
}
.btn-ghost:hover{border-color:var(--line-strong);background:rgba(16,26,46,.75);color:var(--text-hi);}
.btn-lg{padding:14px 30px;font-size:15.5px;}
.btn-block{width:100%;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line);color:var(--text-hi);background:var(--glass);
  align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:var(--line-strong);color:var(--brand);}
@media (max-width:1023px){
  .nav-links{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-actions .btn-ghost{display:none;}
}
/* 移动抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(5,8,15,.6);opacity:0;visibility:hidden;
  transition:opacity .22s var(--ease), visibility .22s var(--ease);z-index:90;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;z-index:95;
  background:rgba(12,21,38,.92);
  backdrop-filter:blur(20px) saturate(140%);
  border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .26s var(--ease);
  display:flex;flex-direction:column;padding:22px 20px 28px;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;}
.drawer-close{width:38px;height:38px;border-radius:11px;border:1px solid var(--line);color:var(--text);display:flex;align-items:center;justify-content:center;}
.drawer-close:hover{color:var(--brand);border-color:var(--line-strong);}
.drawer-links{display:flex;flex-direction:column;gap:6px;flex:1;}
.drawer-links a{
  padding:13px 14px;border-radius:12px;color:var(--text);font-size:16px;
  border:1px solid transparent;
}
.drawer-links a:hover{background:rgba(22,224,168,.08);color:var(--text-hi);border-color:var(--line);}
.drawer-links a.active{color:var(--brand);background:rgba(22,224,168,.1);border-color:rgba(22,224,168,.3);}
.drawer-foot{display:flex;flex-direction:column;gap:10px;padding-top:16px;border-top:1px solid var(--line);}

/* ============ 页面 Hero ============ */
.page-hero{
  position:relative;overflow:hidden;
  padding:64px 0 0;
  background-image:linear-gradient(rgba(5,8,15,.78), rgba(5,8,15,.86)), url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";position:absolute;right:-160px;bottom:-220px;width:620px;height:620px;border-radius:50%;
  background:radial-gradient(circle, rgba(22,224,168,.10) 0%, rgba(22,224,168,0) 68%);
  pointer-events:none;
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size:40px 40px,40px 40px;
}
.hero-wrap{position:relative;z-index:2;padding-bottom:34px;}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:end;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--r-pill);
  border:1px solid rgba(22,224,168,.32);background:rgba(22,224,168,.08);
  color:var(--brand);font-size:12.5px;font-weight:600;letter-spacing:.04em;margin-bottom:18px;
}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand-glow);}
.page-hero h1{
  font-size:clamp(28px,4vw,46px);line-height:1.16;letter-spacing:.01em;margin-bottom:16px;
}
.page-hero h1 .hl{color:var(--brand);}
.hero-lead{color:var(--text);font-size:16.5px;max-width:38em;}
.hero-side{padding-bottom:6px;}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-lo);margin-bottom:14px;flex-wrap:wrap;}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{opacity:.55;}
.crumbs .cur{color:var(--brand);}
.hero-side p{color:var(--text);font-size:15px;margin-bottom:10px;}
.hero-metrics{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;}
.metric{
  display:flex;flex-direction:column;gap:2px;padding:10px 16px;border-radius:14px;
  background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(18px);
  min-width:104px;
}
.metric b{color:var(--text-hi);font-size:18px;font-weight:800;line-height:1.2;}
.metric span{color:var(--text-lo);font-size:12px;}
.filter-bar{position:relative;z-index:2;border-top:1px solid var(--line);background:rgba(8,14,26,.5);}
.filter-pills{display:flex;flex-wrap:wrap;gap:10px;padding:16px 0;}
.pill{
  display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--glass);color:var(--text);font-size:13.5px;font-weight:500;
}
.pill:hover{border-color:var(--line-strong);color:var(--text-hi);transform:translateY(-1px);}
.pill.active{background:var(--brand);border-color:var(--brand);color:#04140F;font-weight:700;box-shadow:0 8px 24px var(--brand-glow);}

/* ============ 通用板块 ============ */
.section{padding:var(--gap-section) 0 0;}
.section:last-of-type{padding-bottom:var(--gap-section);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(23px,2.6vw,32px);position:relative;padding-left:16px;}
.section-head h2::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:4px;border-radius:3px;
  background:linear-gradient(180deg,var(--brand),var(--brand-deep));box-shadow:0 0 16px var(--brand-glow);
}
.section-head .sub{color:var(--text-lo);font-size:14.5px;margin-top:8px;padding-left:16px;}
.section-head .link-more{color:var(--brand);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.section-head .link-more:hover{gap:10px;}

/* ============ 步进卡 ============ */
.step-list{display:flex;flex-direction:column;gap:22px;}
.step-card{
  position:relative;display:grid;grid-template-columns:260px 1fr;gap:30px;align-items:center;
  background:var(--surface);border-radius:var(--r-card);padding:24px;
  box-shadow:var(--shadow-card);overflow:hidden;
  transition:transform .22s var(--ease), box-shadow .22s var(--ease);
}
.step-card::after{
  content:"";position:absolute;inset:0;border-radius:var(--r-card);pointer-events:none;
  border:1px solid var(--line);transition:border-color .22s var(--ease);
}
.step-card:hover{transform:translateY(-5px);}
.step-card:hover::after{border-color:rgba(22,224,168,.4);}
.step-media{
  position:relative;border-radius:16px;overflow:hidden;aspect-ratio:4/3;background:var(--ink-700);
  box-shadow:inset 0 0 0 1px var(--line);
}
.step-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.step-card:hover .step-media img{transform:scale(1.04);}
.step-body{position:relative;z-index:2;}
.step-num{
  position:absolute;right:22px;top:6px;font-size:98px;font-weight:800;line-height:1;
  color:transparent;-webkit-text-stroke:1px rgba(22,224,168,.32);
  font-variant-numeric:tabular-nums;pointer-events:none;user-select:none;
}
.step-kicker{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;color:var(--brand);font-weight:600;margin-bottom:10px;letter-spacing:.04em;}
.step-body h3{font-size:20px;margin-bottom:10px;}
.step-body p{color:var(--text);font-size:15px;max-width:34em;}
.step-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--r-pill);
  font-size:12.5px;color:var(--text-lo);border:1px solid var(--line);background:rgba(255,255,255,.02);
}
.tag.brand{color:var(--brand);border-color:rgba(22,224,168,.3);background:rgba(22,224,168,.08);}
.tag.accent{color:var(--accent);border-color:rgba(255,154,60,.28);background:var(--accent-soft);}
@media (max-width:767px){
  .step-card{grid-template-columns:1fr;gap:18px;padding:20px;}
  .step-num{font-size:68px;right:16px;top:2px;}
}

/* ============ 卡片网格 ============ */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.card-grid.two{grid-template-columns:repeat(2,1fr);}
.card-grid.four{grid-template-columns:repeat(4,1fr);}
.card{
  position:relative;display:flex;flex-direction:column;
  background:var(--surface);border-radius:var(--r-card);padding:24px;
  box-shadow:var(--shadow-card);overflow:hidden;
  transition:transform .22s var(--ease);
}
.card::after{content:"";position:absolute;inset:0;border-radius:var(--r-card);border:1px solid var(--line);pointer-events:none;transition:border-color .22s var(--ease);}
.card:hover{transform:translateY(-5px);}
.card:hover::after{border-color:rgba(22,224,168,.4);}
.card h3{font-size:18px;margin-bottom:10px;}
.card p{font-size:14.5px;color:var(--text);}
.card .icon-box{
  width:44px;height:44px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:rgba(22,224,168,.1);border:1px solid rgba(22,224,168,.28);color:var(--brand);
  font-size:17px;margin-bottom:16px;
}
.card .metric-line{display:flex;align-items:baseline;gap:8px;margin-bottom:12px;}
.card .metric-line b{font-size:24px;color:var(--text-hi);font-weight:800;}
.card .metric-line span{font-size:13px;color:var(--text-lo);}
.card-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;}
.card-thumb{border-radius:16px;overflow:hidden;aspect-ratio:16/9;background:var(--ink-700);margin-bottom:18px;box-shadow:inset 0 0 0 1px var(--line);}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.card:hover .card-thumb img{transform:scale(1.03);}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;border:1px solid var(--line);
}
.badge.ok{color:var(--brand);border-color:rgba(22,224,168,.32);background:rgba(22,224,168,.09);}
.badge.warn{color:var(--accent);border-color:rgba(255,154,60,.3);background:var(--accent-soft);}
.badge.mute{color:var(--text-lo);background:rgba(255,255,255,.03);}
@media (max-width:1023px){
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .card-grid.four{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:639px){
  .card-grid,.card-grid.two,.card-grid.four{grid-template-columns:1fr;}
}

/* ============ 参数卡 ============ */
.param-list{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.param{
  padding:20px;border-radius:var(--r-sm);background:var(--ink-700);
  border:1px solid var(--line);transition:border-color .2s var(--ease), transform .2s var(--ease);
}
.param:hover{border-color:rgba(22,224,168,.35);transform:translateY(-4px);}
.param dt{font-size:12.5px;color:var(--text-lo);margin-bottom:8px;letter-spacing:.04em;}
.param dd{margin:0;color:var(--text-hi);font-size:15px;font-weight:600;line-height:1.6;}
@media (max-width:1023px){ .param-list{grid-template-columns:repeat(2,1fr);} }
@media (max-width:639px){ .param-list{grid-template-columns:1fr;} }

/* ============ 提示对照 ============ */
.fix-wrap{
  background:var(--ink-700);border-radius:var(--r-lg);border:1px solid var(--line);
  padding:28px;box-shadow:var(--shadow-soft);
}
.fix-row{
  display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:center;
  padding:16px 14px;border-radius:var(--r-sm);border-bottom:1px solid var(--line);
  transition:background-color .2s var(--ease);
}
.fix-row:last-child{border-bottom:0;}
.fix-row:hover{background:rgba(22,224,168,.05);}
.fix-alert{display:flex;align-items:center;gap:10px;color:var(--text-hi);font-size:15px;font-weight:600;}
.fix-alert i{color:var(--accent);font-size:14px;}
.fix-action{display:flex;align-items:center;gap:10px;color:var(--text);font-size:14.5px;}
.fix-action i{color:var(--brand);font-size:13px;}
@media (max-width:767px){
  .fix-row{grid-template-columns:1fr;gap:8px;padding:14px 10px;}
  .fix-wrap{padding:18px;}
}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:960px;}
.faq-item{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-sm);
  backdrop-filter:blur(18px) saturate(140%);overflow:hidden;
  transition:border-color .2s var(--ease), background-color .2s var(--ease);
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-item.open{border-color:rgba(22,224,168,.36);background:rgba(16,26,46,.78);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;text-align:left;color:var(--text-hi);font-size:16px;font-weight:600;
  position:relative;padding-left:24px;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:18px;bottom:18px;width:3px;border-radius:0 3px 3px 0;
  background:var(--line-strong);transition:background-color .2s var(--ease);
}
.faq-item.open .faq-q::before{background:var(--brand);box-shadow:0 0 14px var(--brand-glow);}
.faq-q .plus{color:var(--text-lo);font-size:16px;transition:transform .24s var(--ease), color .2s var(--ease);flex-shrink:0;}
.faq-item.open .faq-q .plus{transform:rotate(45deg);color:var(--brand);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);}
.faq-a p{padding:0 24px 20px;color:var(--text);font-size:14.8px;}

/* ============ 安全提示条 ============ */
.safe-band{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);background:var(--ink-700);
}
.safe-item{padding:26px 24px;border-right:1px solid var(--line);}
.safe-item:last-child{border-right:0;}
.safe-item h3{font-size:17px;margin-bottom:10px;display:flex;align-items:center;gap:10px;}
.safe-item h3 i{color:var(--brand);font-size:15px;}
.safe-item p{font-size:14.3px;color:var(--text);}
@media (max-width:767px){
  .safe-band{grid-template-columns:1fr;}
  .safe-item{border-right:0;border-bottom:1px solid var(--line);}
  .safe-item:last-child{border-bottom:0;}
}

/* ============ CTA 收口 ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  padding:56px 44px;text-align:center;
  background-image:linear-gradient(rgba(5,8,15,.74), rgba(5,8,15,.82)), url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  border:1px solid var(--line);
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:14px;}
.cta-band p{color:var(--text);font-size:15.5px;max-width:36em;margin:0 auto 26px;}
.cta-actions{display:flex;justify-content:center;align-items:center;gap:14px;flex-wrap:wrap;}
@media (max-width:639px){ .cta-band{padding:40px 20px;} }

/* ============ 返回入口 ============ */
.back-row{display:flex;justify-content:center;margin-top:44px;}
.back-link{
  display:inline-flex;align-items:center;gap:8px;color:var(--text-lo);font-size:14px;
  padding:10px 20px;border-radius:var(--r-pill);border:1px solid var(--line);
}
.back-link:hover{color:var(--brand);border-color:rgba(22,224,168,.36);transform:translateX(-3px);}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:var(--gap-section);
  background:var(--ink-900);
  border-top:1px solid var(--line);
  background-image:
    linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px);
  background-size:40px 40px,40px 40px;
}
.footer-inner{padding:64px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.footer-brand .fb-name{color:var(--text-hi);font-size:18px;font-weight:800;margin-bottom:14px;letter-spacing:.01em;}
.footer-brand p{color:var(--text-lo);font-size:14px;max-width:30em;}
.social-row{display:flex;gap:10px;margin-top:20px;}
.social-row a{
  width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);color:var(--text-lo);background:rgba(255,255,255,.02);
}
.social-row a:hover{color:var(--brand);border-color:rgba(22,224,168,.4);transform:translateY(-2px);}
.footer-col h4{font-size:14px;color:var(--text-hi);margin-bottom:16px;letter-spacing:.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{color:var(--text-lo);font-size:14px;display:inline-block;}
.footer-col a:hover{color:var(--brand);transform:translateX(2px);}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  color:var(--text-lo);font-size:13px;
}
.footer-bottom .links{display:flex;gap:20px;flex-wrap:wrap;}
.footer-bottom .links a:hover{color:var(--brand);}
@media (max-width:1023px){ .footer-grid{grid-template-columns:1fr 1fr;} }
@media (max-width:639px){ .footer-grid{grid-template-columns:1fr;gap:30px;} .footer-inner{padding:48px 0 22px;} }

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:20px;bottom:24px;width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;z-index:70;
  background:var(--glass);border:1px solid var(--line);color:var(--text);
  backdrop-filter:blur(18px);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .22s var(--ease), visibility .22s var(--ease), transform .22s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{color:var(--brand);border-color:rgba(22,224,168,.4);}

/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease), transform .5s var(--ease);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}
@media (max-width:639px){
  :root{--gap-section:64px;}
  .hero-grid{grid-template-columns:1fr;gap:24px;align-items:start;}
  .page-hero{padding-top:44px;}
}

/* roulang page: category2 */
:root{
  --ink-900:#05080F; --ink-800:#080E1A; --ink-700:#0C1526; --surface:#101A2E;
  --glass:rgba(16,26,46,.55);
  --line:rgba(255,255,255,.08); --line-strong:rgba(255,255,255,.16);
  --brand:#16E0A8; --brand-deep:#0FB98A; --brand-glow:rgba(22,224,168,.35);
  --accent:#FF9A3C; --accent-soft:rgba(255,154,60,.14); --danger:#FF6B6B;
  --text-hi:#E8EEF7; --text:#C3CEDE; --text-lo:#7C8AA3;
  --radius:20px; --radius-lg:24px; --radius-sm:12px; --pill:999px;
  --shadow-card:0 20px 60px rgba(0,0,0,.55);
  --inset-line:inset 0 0 0 1px rgba(255,255,255,.06);
  --ease:cubic-bezier(.2,.7,.3,1);
  --gap-block:110px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;padding:0;background:var(--ink-800);color:var(--text);
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.8;font-weight:400;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:1;opacity:.03;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(/%23n)'/%3E%3C/svg%3E");
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--text);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--brand);}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";letter-spacing:.02em;}
body.no-scroll{overflow:hidden;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;position:relative;}
@media (min-width:1024px){.container{padding:0 32px;}}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:var(--pill);font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;transition:all .22s var(--ease);white-space:nowrap;
}
.btn-primary{
  background:rgba(22,224,168,.12);color:var(--brand);border-color:rgba(22,224,168,.45);
  box-shadow:0 8px 28px var(--brand-glow);
}
.btn-primary:hover{background:rgba(22,224,168,.2);color:#7CF3D2;transform:translateY(-1px);box-shadow:0 10px 34px var(--brand-glow);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 4px 14px rgba(22,224,168,.22);}
.btn-ghost{
  background:rgba(255,255,255,.03);color:var(--text);border-color:var(--line);
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
}
.btn-ghost:hover{color:var(--text-hi);border-color:var(--line-strong);background:rgba(255,255,255,.07);transform:translateY(-1px);}
.btn-lg{padding:15px 30px;font-size:16px;}
.text-link{color:var(--brand);font-weight:600;display:inline-flex;align-items:center;gap:6px;font-size:14px;border-bottom:1px dashed rgba(22,224,168,.5);transition:all .18s var(--ease);}
.text-link:hover{color:#7CF3D2;border-bottom-style:solid;gap:10px;}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;width:100%;
  border-bottom:1px solid transparent;transition:background .25s var(--ease),border-color .25s var(--ease),backdrop-filter .25s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(8,14,26,.78);border-bottom-color:var(--line);
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:74px;}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;}
.brand-mark{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(150deg,rgba(22,224,168,.22),rgba(22,224,168,.06));
  border:1px solid rgba(22,224,168,.42);color:var(--brand);
  font-weight:800;font-size:14px;letter-spacing:.02em;box-shadow:0 6px 20px rgba(22,224,168,.18);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text .l1{font-size:16px;font-weight:800;color:var(--text-hi);letter-spacing:.01em;}
.brand-text .l2{font-size:11px;color:var(--text-lo);letter-spacing:.14em;}
.brand:hover .brand-text .l1{color:var(--brand);}
.nav-links{display:none;align-items:center;gap:26px;}
@media (min-width:1024px){.nav-links{display:flex;}}
.nav-links a{
  position:relative;font-size:15px;font-weight:500;color:var(--text);padding:6px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease);
}
.nav-links a:hover{color:var(--brand);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--brand);}
.nav-links a.active::before{
  content:"";position:absolute;left:50%;bottom:-9px;transform:translateX(-50%);
  width:4px;height:4px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand-glow);
}
.nav-links a.active::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:10px;}
.nav-toggle{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--text-hi);font-size:16px;
  transition:all .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--line-strong);color:var(--brand);}
@media (min-width:768px){.nav-toggle{display:none;}}
.nav-actions .btn{padding:10px 18px;font-size:14px;}

/* 移动抽屉 */
.drawer{
  position:fixed;top:0;right:0;z-index:80;width:84vw;max-width:380px;height:100%;
  background:rgba(10,17,31,.92);border-left:1px solid var(--line);
  backdrop-filter:blur(22px) saturate(140%);-webkit-backdrop-filter:blur(22px) saturate(140%);
  transform:translateX(105%);transition:transform .3s var(--ease);
  display:flex;flex-direction:column;padding:24px 22px calc(24px + env(safe-area-inset-bottom));
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px;}
.drawer-title{font-size:14px;color:var(--text-lo);letter-spacing:.1em;}
.drawer-close{width:38px;height:38px;border-radius:11px;border:1px solid var(--line);display:grid;place-items:center;color:var(--text-hi);}
.drawer-close:hover{color:var(--brand);border-color:var(--line-strong);}
.drawer-nav{display:flex;flex-direction:column;gap:4px;flex:1;overflow-y:auto;}
.drawer-nav a{
  padding:13px 14px;border-radius:12px;font-size:16px;color:var(--text);
  border:1px solid transparent;transition:all .18s var(--ease);
}
.drawer-nav a:hover,.drawer-nav a.active{background:rgba(22,224,168,.08);border-color:rgba(22,224,168,.28);color:var(--brand);}
.drawer-cta{display:flex;flex-direction:column;gap:10px;margin-top:18px;}
.drawer-cta .btn{width:100%;}
.drawer-mask{position:fixed;inset:0;background:rgba(5,8,15,.6);z-index:70;opacity:0;visibility:hidden;transition:opacity .28s var(--ease);}
.drawer-mask.show{opacity:1;visibility:visible;}

/* ============ 分类 Hero ============ */
.page-hero{
  position:relative;overflow:hidden;padding:56px 0 44px;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(100deg,rgba(5,8,15,.94) 22%,rgba(5,8,15,.72) 62%,rgba(5,8,15,.88) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.4;
  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:40px 40px;
}
.page-hero::after{
  content:"";position:absolute;right:-160px;bottom:-220px;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,224,168,.14),transparent 66%);pointer-events:none;
}
@media (min-width:1024px){.page-hero{padding:72px 0 56px;}}
.hero-grid{display:grid;gap:26px;align-items:end;position:relative;z-index:2;}
@media (min-width:1024px){.hero-grid{grid-template-columns:minmax(0,1.25fr) minmax(0,.85fr);gap:48px;}}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-lo);margin-bottom:16px;}
.crumb a{color:var(--text-lo);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{opacity:.5;}
.crumb .now{color:var(--brand);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--pill);
  background:rgba(22,224,168,.08);border:1px solid rgba(22,224,168,.3);
  color:var(--brand);font-size:12.5px;font-weight:600;letter-spacing:.04em;margin-bottom:16px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand-glow);}
.page-hero h1{
  font-size:clamp(28px,4vw,46px);font-weight:800;line-height:1.16;letter-spacing:.01em;color:var(--text-hi);
}
.page-hero h1 .hl{color:var(--brand);}
.hero-lead{font-size:16px;line-height:1.85;color:var(--text);margin-top:16px;max-width:600px;}
.hero-side{
  border-radius:var(--radius);border:1px solid var(--line);background:var(--glass);
  padding:20px 22px;box-shadow:var(--shadow-card),var(--inset-line);
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
}
.hero-side h2{font-size:16px;font-weight:700;color:var(--text-hi);margin-bottom:10px;}
.hero-side p{font-size:14px;color:var(--text-lo);line-height:1.8;}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;}
.fact{
  flex:1 1 40%;min-width:120px;padding:12px 14px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.03);border:1px solid var(--line);
}
.fact b{display:block;font-size:22px;font-weight:800;color:var(--brand);line-height:1.2;}
.fact span{font-size:12.5px;color:var(--text-lo);}
.pill-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;position:relative;z-index:2;}
.pill{
  display:inline-flex;align-items:center;gap:7px;padding:9px 18px;border-radius:var(--pill);
  font-size:14px;font-weight:500;color:var(--text);background:rgba(255,255,255,.03);
  border:1px solid var(--line);backdrop-filter:blur(14px);transition:all .2s var(--ease);
}
.pill:hover{color:var(--brand);border-color:rgba(22,224,168,.4);transform:translateY(-1px);}
.pill.is-active{background:rgba(22,224,168,.14);border-color:rgba(22,224,168,.5);color:var(--brand);font-weight:700;}

/* ============ 通用板块 ============ */
.section{padding:var(--gap-block) 0;}
.section.tight{padding:64px 0;}
@media (max-width:767px){.section{padding:64px 0;}.section.tight{padding:52px 0;}}
.band-deep{background:var(--ink-700);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:36px;}
.sec-head h2{font-size:clamp(24px,3vw,32px);font-weight:800;color:var(--text-hi);line-height:1.25;}
.sec-head .sub{font-size:14.5px;color:var(--text-lo);margin-top:8px;max-width:640px;}
.sec-tag{
  display:inline-block;padding:5px 12px;border-radius:var(--pill);font-size:12px;font-weight:600;
  background:var(--accent-soft);border:1px solid rgba(255,154,60,.35);color:var(--accent);margin-bottom:12px;
}

/* ============ 大 Banner ============ */
.banner{
  border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-card),var(--inset-line);position:relative;background:var(--surface);
}
.banner-media{position:relative;aspect-ratio:16/9;overflow:hidden;}
.banner-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease);}
.banner:hover .banner-media img{transform:scale(1.03);}
.banner-media::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(5,8,15,.94) 4%,rgba(5,8,15,.25) 58%,rgba(5,8,15,.1));}
.banner-body{position:absolute;left:0;right:0;bottom:0;padding:26px 24px;z-index:2;}
@media (min-width:768px){.banner-body{padding:38px 40px;}}
.banner-body h2{font-size:clamp(21px,2.6vw,30px);font-weight:800;color:#fff;line-height:1.3;max-width:640px;}
.banner-body p{font-size:14.5px;color:rgba(232,238,247,.78);margin-top:10px;max-width:560px;line-height:1.8;}
.banner-body .actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px;}

/* ============ 左图右文交错带 ============ */
.alt-band{
  display:grid;gap:24px;align-items:center;padding:26px 0;
  border-bottom:1px dashed var(--line);
}
.alt-band:last-child{border-bottom:0;}
@media (min-width:900px){
  .alt-band{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:52px;padding:32px 0;}
  .alt-band.reverse .alt-media{order:2;}
}
.alt-media{
  position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  aspect-ratio:16/9;box-shadow:var(--shadow-card),var(--inset-line);background:var(--surface);
}
.alt-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease);}
.alt-band:hover .alt-media img{transform:scale(1.03);}
.alt-media .tag{
  position:absolute;left:14px;top:14px;padding:5px 13px;border-radius:var(--pill);font-size:12px;font-weight:700;
  background:rgba(5,8,15,.7);border:1px solid rgba(22,224,168,.4);color:var(--brand);
  backdrop-filter:blur(10px);
}
.alt-body h2{font-size:clamp(21px,2.4vw,27px);font-weight:800;color:var(--text-hi);line-height:1.32;}
.alt-body p{font-size:15px;line-height:1.85;color:var(--text);margin-top:14px;max-width:38em;}
.alt-body .meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.chip{
  display:inline-flex;align-items:center;padding:5px 12px;border-radius:var(--pill);font-size:12.5px;
  color:var(--text-lo);background:rgba(255,255,255,.03);border:1px solid var(--line);
}
.alt-body .text-link{margin-top:18px;}

/* ============ 参数卡 ============ */
.spec-grid{display:grid;gap:20px;grid-template-columns:1fr;}
@media (min-width:640px){.spec-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.spec-grid{grid-template-columns:repeat(4,1fr);}}
.spec-card{
  padding:26px 22px 24px;border-radius:var(--radius);border:1px solid var(--line);background:var(--surface);
  box-shadow:var(--shadow-card),var(--inset-line);transition:all .22s var(--ease);position:relative;overflow:hidden;
}
.spec-card::after{
  content:"";position:absolute;right:-40px;top:-40px;width:130px;height:130px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,224,168,.14),transparent 70%);
}
.spec-card:hover{transform:translateY(-5px);border-color:rgba(22,224,168,.4);}
.spec-card .k{font-size:34px;font-weight:800;color:var(--brand);line-height:1;letter-spacing:-.01em;}
.spec-card .k small{font-size:14px;font-weight:600;color:var(--text-lo);margin-left:4px;}
.spec-card h3{font-size:17px;font-weight:700;color:var(--text-hi);margin-top:14px;}
.spec-card p{font-size:14px;line-height:1.8;color:var(--text-lo);margin-top:8px;}

/* ============ 步进流程 ============ */
.flow{display:grid;gap:18px;grid-template-columns:1fr;}
@media (min-width:640px){.flow{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.flow{grid-template-columns:repeat(4,1fr);}}
.flow-step{
  position:relative;padding:28px 22px 24px;border-radius:var(--radius);
  background:rgba(255,255,255,.02);border:1px solid var(--line);transition:all .22s var(--ease);
}
.flow-step:hover{border-color:rgba(22,224,168,.36);transform:translateY(-4px);background:rgba(22,224,168,.05);}
.flow-step .no{
  font-size:40px;font-weight:800;line-height:1;color:transparent;
  -webkit-text-stroke:1px rgba(22,224,168,.55);letter-spacing:.02em;
}
.flow-step h3{font-size:17px;font-weight:700;color:var(--text-hi);margin-top:12px;}
.flow-step p{font-size:14px;color:var(--text-lo);line-height:1.8;margin-top:8px;}

/* ============ FAQ ============ */
.faq-wrap{display:grid;gap:16px;}
.faq-item{
  border-radius:var(--radius);border:1px solid var(--line);background:var(--glass);
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--inset-line);overflow:hidden;transition:border-color .2s var(--ease);
}
.faq-item[open]{border-color:rgba(22,224,168,.32);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:19px 22px;font-size:16px;font-weight:600;color:var(--text-hi);position:relative;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;
  background:var(--line-strong);transition:background .2s var(--ease);
}
.faq-item[open] summary::before{background:var(--brand);box-shadow:0 0 12px var(--brand-glow);}
.faq-item summary:hover{color:var(--brand);}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line-strong);color:var(--text-lo);font-size:13px;transition:all .25s var(--ease);
}
.faq-item[open] .faq-icon{transform:rotate(45deg);color:var(--brand);border-color:rgba(22,224,168,.5);}
.faq-body{padding:0 22px 20px;font-size:14.8px;line-height:1.85;color:var(--text-lo);}

/* ============ CTA 收口 ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);border:1px solid var(--line);
  padding:52px 26px;text-align:center;
  background-image:linear-gradient(rgba(5,8,15,.82),rgba(5,8,15,.9)),url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;
  box-shadow:var(--shadow-card);
}
@media (min-width:768px){.cta-band{padding:74px 60px;}}
.cta-band h2{font-size:clamp(23px,3vw,34px);font-weight:800;color:#fff;line-height:1.3;}
.cta-band p{font-size:15.5px;color:rgba(195,206,222,.86);margin-top:14px;max-width:640px;margin-left:auto;margin-right:auto;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:26px;}

/* ============ 返回首页 ============ */
.back-home{display:flex;justify-content:center;padding-top:8px;}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-900);border-top:1px solid var(--line);position:relative;overflow:hidden;margin-top:20px;
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.35;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:40px 40px;
}
.footer-inner{position:relative;z-index:2;padding:64px 0 0;}
.footer-grid{display:grid;gap:36px;grid-template-columns:1fr;}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand .fb-name{font-size:19px;font-weight:800;color:var(--text-hi);letter-spacing:.01em;}
.footer-brand p{font-size:14px;color:var(--text-lo);line-height:1.85;margin-top:14px;max-width:340px;}
.social-row{display:flex;gap:12px;margin-top:20px;}
.social-row a{
  width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--text-lo);font-size:14px;
  transition:all .2s var(--ease);
}
.social-row a:hover{color:var(--brand);border-color:rgba(22,224,168,.45);transform:translateY(-2px);}
.footer-col h4{font-size:14px;font-weight:700;color:var(--text-hi);margin-bottom:16px;letter-spacing:.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:14px;color:var(--text-lo);display:inline-block;transition:all .18s var(--ease);}
.footer-col a:hover{color:var(--brand);transform:translateX(2px);}
.footer-bottom{
  margin-top:52px;padding:22px 0;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--text-lo);
}
.footer-bottom .links{display:flex;flex-wrap:wrap;gap:18px;}
.footer-bottom .links a{color:var(--text-lo);}
.footer-bottom .links a:hover{color:var(--brand);}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:20px;bottom:calc(22px + env(safe-area-inset-bottom));z-index:55;
  width:46px;height:46px;border-radius:50%;display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--line);color:var(--text);
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
  opacity:0;visibility:hidden;transform:translateY(10px);transition:all .26s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{color:var(--brand);border-color:rgba(22,224,168,.45);}

/* 进入动画 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category3 */
:root{
    --ink-900:#05080F;
    --ink-800:#080E1A;
    --ink-700:#0C1526;
    --surface:#101A2E;
    --glass:rgba(16,26,46,.55);
    --line:rgba(255,255,255,.08);
    --line-strong:rgba(255,255,255,.16);
    --brand:#16E0A8;
    --brand-deep:#0FB98A;
    --brand-glow:rgba(22,224,168,.35);
    --accent:#FF9A3C;
    --accent-soft:rgba(255,154,60,.14);
    --danger:#FF6B6B;
    --text-hi:#E8EEF7;
    --text:#C3CEDE;
    --text-lo:#7C8AA3;
    --radius-card:20px;
    --radius-sm:12px;
    --shadow-card:0 20px 60px rgba(0,0,0,.55), inset 0 0 0 1px rgba(255,255,255,.06);
    --ease:cubic-bezier(.2,.7,.3,1);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--ink-800);
    color:var(--text);
    font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{max-width:100%;display:block;border-radius:var(--radius-sm)}
  a{color:inherit;text-decoration:none;transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease)}
  h1,h2,h3,h4{margin:0;color:var(--text-hi);font-weight:800;line-height:1.25}
  p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  button{font-family:inherit}
  .num{font-variant-numeric:tabular-nums;letter-spacing:.01em}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

  .container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
  @media (min-width:768px){.container{padding:0 32px}}

  /* ============ 头部导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(8,14,26,.55);
    backdrop-filter:blur(18px) saturate(140%);
    -webkit-backdrop-filter:blur(18px) saturate(140%);
    border-bottom:1px solid transparent;
    transition:background .22s var(--ease),border-color .22s var(--ease);
  }
  .site-header.scrolled{background:rgba(8,14,26,.86);border-bottom-color:var(--line)}
  .nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:76px}
  .brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
  .brand-mark{
    width:44px;height:44px;flex-shrink:0;
    display:flex;align-items:center;justify-content:center;
    border-radius:14px;
    background:linear-gradient(140deg,rgba(22,224,168,.22),rgba(22,224,168,.06));
    border:1px solid rgba(22,224,168,.42);
    color:var(--brand);font-weight:800;font-size:16px;letter-spacing:.02em;
    box-shadow:0 8px 26px rgba(22,224,168,.22);
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.15}
  .brand-text .l1{font-size:16px;font-weight:800;color:var(--text-hi);letter-spacing:.02em}
  .brand-text .l2{font-size:11px;font-weight:600;color:var(--brand);letter-spacing:.16em}

  .nav-links{display:none;align-items:center;gap:4px}
  .nav-links a{
    position:relative;padding:8px 13px;border-radius:999px;
    font-size:15px;font-weight:500;color:var(--text);
    transition:color .18s var(--ease);
  }
  .nav-links a::after{
    content:"";position:absolute;left:50%;bottom:3px;width:16px;height:2px;border-radius:2px;
    background:var(--brand);transform:translateX(-50%) scaleX(0);
    transition:transform .22s var(--ease);
  }
  .nav-links a:hover{color:var(--brand)}
  .nav-links a:hover::after{transform:translateX(-50%) scaleX(1)}
  .nav-links a.active{color:var(--brand);font-weight:600}
  .nav-links a.active::after{transform:translateX(-50%) scaleX(1)}
  .nav-links a.active::before{
    content:"";position:absolute;left:50%;bottom:-7px;width:4px;height:4px;border-radius:50%;
    background:var(--brand);transform:translateX(-50%);
  }

  .nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
  .nav-toggle{
    display:inline-flex;align-items:center;justify-content:center;
    width:42px;height:42px;border-radius:14px;
    background:rgba(255,255,255,.04);border:1px solid var(--line);
    color:var(--text-hi);font-size:17px;cursor:pointer;
    transition:border-color .18s var(--ease),background-color .18s var(--ease);
  }
  .nav-toggle:hover{border-color:var(--line-strong);background:rgba(255,255,255,.07)}

  /* 移动端抽屉 */
  .drawer{
    position:fixed;top:0;right:0;z-index:80;
    width:84vw;max-width:360px;height:100dvh;
    padding:24px 20px calc(24px + env(safe-area-inset-bottom));
    background:rgba(8,14,26,.92);
    backdrop-filter:blur(20px) saturate(140%);
    -webkit-backdrop-filter:blur(20px) saturate(140%);
    border-left:1px solid var(--line);
    transform:translateX(102%);
    transition:transform .3s var(--ease);
    display:flex;flex-direction:column;gap:8px;
    overflow-y:auto;
  }
  .drawer.open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
  .drawer-close{
    width:38px;height:38px;border-radius:12px;background:rgba(255,255,255,.05);
    border:1px solid var(--line);color:var(--text-hi);cursor:pointer;font-size:16px;
  }
  .drawer a{
    padding:13px 14px;border-radius:14px;font-size:15px;font-weight:500;
    color:var(--text);border:1px solid transparent;
  }
  .drawer a:hover{color:var(--brand);background:rgba(22,224,168,.07);border-color:rgba(22,224,168,.2)}
  .drawer a.active{color:var(--brand);background:rgba(22,224,168,.08);border-color:rgba(22,224,168,.28)}
  .drawer .drawer-cta{margin-top:auto;padding-top:20px;display:flex;flex-direction:column;gap:10px}
  .overlay{
    position:fixed;inset:0;z-index:70;background:rgba(5,8,15,.66);
    opacity:0;pointer-events:none;transition:opacity .25s var(--ease);
  }
  .overlay.show{opacity:1;pointer-events:auto}

  @media (min-width:1024px){
    .nav-links{display:flex}
    .nav-toggle{display:none}
    .drawer,.overlay{display:none}
  }

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 22px;border-radius:999px;
    font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
    border:1px solid transparent;cursor:pointer;
    transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
  }
  .btn-primary{
    background:rgba(22,224,168,.13);
    color:var(--brand);
    border-color:rgba(22,224,168,.45);
    box-shadow:0 8px 28px var(--brand-glow);
  }
  .btn-primary:hover{
    background:rgba(22,224,168,.22);
    transform:translateY(-1px);
    box-shadow:0 10px 34px var(--brand-glow);
  }
  .btn-primary:active{transform:translateY(1px);box-shadow:0 4px 16px rgba(22,224,168,.2)}
  .btn-ghost{
    background:rgba(255,255,255,.03);
    color:var(--text-hi);
    border-color:var(--line);
  }
  .btn-ghost:hover{
    background:rgba(255,255,255,.07);
    border-color:var(--line-strong);
    transform:translateY(-1px);
  }
  .btn-ghost:active{transform:translateY(1px)}
  .btn-sm{padding:9px 16px;font-size:14px}
  .link-more{
    color:var(--brand);font-size:14px;font-weight:600;
    display:inline-flex;align-items:center;gap:6px;
  }
  .link-more:hover{color:var(--brand-deep)}
  .link-more i{transition:transform .2s var(--ease)}
  .link-more:hover i{transform:translateX(3px)}

  /* ============ 徽章与标签 ============ */
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 12px;border-radius:999px;
    font-size:12px;font-weight:600;line-height:1.4;
    border:1px solid transparent;white-space:nowrap;
  }
  .badge-live{background:rgba(22,224,168,.13);color:var(--brand);border-color:rgba(22,224,168,.42)}
  .badge-soon{background:var(--accent-soft);color:var(--accent);border-color:rgba(255,154,60,.42)}
  .badge-done{background:rgba(255,255,255,.04);color:var(--text-lo);border-color:var(--line)}
  .dot-live{width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand-glow)}
  .tag{
    display:inline-flex;align-items:center;
    padding:5px 12px;border-radius:999px;font-size:12px;font-weight:500;
    color:var(--text-lo);background:rgba(255,255,255,.035);border:1px solid var(--line);
  }
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    padding:6px 14px;border-radius:999px;
    background:rgba(22,224,168,.08);border:1px solid rgba(22,224,168,.26);
    color:var(--brand);font-size:13px;font-weight:600;
  }

  /* ============ Hero ============ */
  .cat-hero{
    position:relative;overflow:hidden;
    padding:52px 0 44px;
    background-image:linear-gradient(rgba(5,8,15,.74),rgba(5,8,15,.9)),url('/assets/images/backpic/back-1.webp');
    background-size:cover;background-position:center;
    border-bottom:1px solid var(--line);
  }
  .cat-hero::after{
    content:"";position:absolute;right:-120px;bottom:-220px;width:620px;height:620px;border-radius:50%;
    background:radial-gradient(circle,rgba(22,224,168,.10),transparent 68%);
    pointer-events:none;
  }
  .cat-hero .grid-tex{
    position:absolute;inset:0;pointer-events:none;opacity:.45;
    background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
    background-size:40px 40px;
    mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),transparent 88%);
    -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),transparent 88%);
  }
  .cat-hero-inner{position:relative;z-index:2;display:grid;gap:28px;align-items:end}
  @media (min-width:1024px){
    .cat-hero{padding:64px 0 56px}
    .cat-hero-inner{grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:48px}
  }
  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-lo);margin-bottom:18px;flex-wrap:wrap}
  .breadcrumb a:hover{color:var(--brand)}
  .breadcrumb .sep{color:rgba(255,255,255,.22)}
  .breadcrumb .now{color:var(--brand)}
  .cat-hero h1{
    font-size:clamp(28px,4vw,48px);line-height:1.16;letter-spacing:.01em;margin:14px 0 0;
  }
  .cat-hero h1 .hl{color:var(--brand)}
  .hero-lead{margin-top:16px;font-size:16px;line-height:1.85;color:var(--text);max-width:38em}
  .hero-side{
    background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-card);
    padding:20px 22px;backdrop-filter:blur(18px) saturate(140%);
    -webkit-backdrop-filter:blur(18px) saturate(140%);
    box-shadow:var(--shadow-card);
  }
  .hero-side h2{font-size:17px;margin-bottom:6px}
  .hero-side p{font-size:14px;color:var(--text);line-height:1.8}
  .stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}
  .stat-cell{
    border-radius:14px;padding:12px 10px;text-align:center;
    background:rgba(255,255,255,.03);border:1px solid var(--line);
  }
  .stat-cell b{display:block;font-size:22px;font-weight:800;color:var(--brand)}
  .stat-cell span{font-size:12px;color:var(--text-lo)}

  /* 筛选胶囊 */
  .filter-row{
    display:flex;flex-wrap:wrap;gap:10px;margin-top:30px;
    padding:14px;border-radius:999px;
    background:rgba(16,26,46,.42);border:1px solid var(--line);
  }
  .filter-row .pill{
    padding:8px 16px;border-radius:999px;font-size:13px;font-weight:600;
    color:var(--text);background:rgba(255,255,255,.03);border:1px solid var(--line);
    cursor:pointer;transition:all .18s var(--ease);
  }
  .filter-row .pill:hover{color:var(--brand);border-color:rgba(22,224,168,.34)}
  .filter-row .pill.on{background:rgba(22,224,168,.15);color:var(--brand);border-color:rgba(22,224,168,.5)}

  /* ============ 通用板块 ============ */
  .section{padding:64px 0}
  @media (min-width:1024px){.section{padding:96px 0}}
  .sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:32px}
  .sec-head h2{font-size:clamp(24px,2.6vw,32px)}
  .sec-head p{margin-top:10px;font-size:15px;color:var(--text-lo);max-width:44em}
  .band{background:var(--ink-700);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

  /* ============ 状态说明卡 ============ */
  .state-grid{display:grid;gap:20px}
  @media (min-width:768px){.state-grid{grid-template-columns:repeat(3,1fr)}}
  .state-card{
    position:relative;overflow:hidden;
    padding:26px 24px;border-radius:var(--radius-card);
    background:var(--glass);border:1px solid var(--line);
    backdrop-filter:blur(18px) saturate(140%);
    -webkit-backdrop-filter:blur(18px) saturate(140%);
    box-shadow:var(--shadow-card);
    transition:transform .22s var(--ease),border-color .22s var(--ease);
  }
  .state-card:hover{transform:translateY(-5px);border-color:rgba(22,224,168,.36)}
  .state-card h3{font-size:19px;margin:16px 0 8px}
  .state-card p{font-size:14.5px;color:var(--text);line-height:1.85}
  .state-index{
    position:absolute;right:18px;top:6px;
    font-size:64px;font-weight:800;line-height:1;
    color:transparent;-webkit-text-stroke:1px rgba(255,255,255,.12);
    pointer-events:none;
  }

  /* ============ 开服清单（表格式卡） ============ */
  .srv-list{display:flex;flex-direction:column;gap:14px}
  .srv-row{
    display:grid;gap:16px;align-items:center;
    grid-template-columns:1fr;
    padding:20px 22px;border-radius:var(--radius-card);
    background:var(--glass);border:1px solid var(--line);
    backdrop-filter:blur(18px) saturate(140%);
    -webkit-backdrop-filter:blur(18px) saturate(140%);
    box-shadow:var(--shadow-card);
    transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
  }
  .srv-row:hover{transform:translateY(-4px);border-color:rgba(22,224,168,.4)}
  .srv-main h3{font-size:18px;margin-bottom:6px}
  .srv-main p{font-size:14px;color:var(--text-lo);line-height:1.75}
  .srv-time{display:flex;flex-direction:column;gap:4px}
  .srv-time .t{font-size:15px;font-weight:700;color:var(--text-hi)}
  .srv-time .s{font-size:12.5px;color:var(--text-lo)}
  .srv-act{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
  @media (min-width:1024px){
    .srv-row{grid-template-columns:132px minmax(0,1fr) 220px auto;gap:22px;padding:22px 26px}
    .srv-act{justify-content:flex-end}
  }

  /* ============ 图文交错 ============ */
  .split{display:grid;gap:28px;align-items:center}
  @media (min-width:1024px){
    .split{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:56px}
    .split.rev .split-media{order:2}
  }
  .split-media{
    position:relative;border-radius:20px;overflow:hidden;
    border:1px solid var(--line);box-shadow:var(--shadow-card);
    aspect-ratio:16/10;background:var(--surface);
  }
  .split-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .4s var(--ease)}
  .split-media:hover img{transform:scale(1.03)}
  .split-body h2{font-size:clamp(23px,2.4vw,30px);margin-bottom:14px}
  .split-body p{font-size:15.5px;color:var(--text);line-height:1.9}
  .check-list{margin-top:20px;display:flex;flex-direction:column;gap:12px}
  .check-list li{display:flex;gap:12px;font-size:15px;color:var(--text);line-height:1.75}
  .check-list i{color:var(--brand);margin-top:6px;font-size:13px}

  /* ============ 流程 ============ */
  .flow{display:grid;gap:20px}
  @media (min-width:768px){.flow{grid-template-columns:repeat(3,1fr)}}
  .flow-card{
    padding:26px 24px;border-radius:var(--radius-card);
    background:rgba(255,255,255,.025);border:1px solid var(--line);
    transition:border-color .22s var(--ease),transform .22s var(--ease);
  }
  .flow-card:hover{border-color:rgba(22,224,168,.34);transform:translateY(-4px)}
  .flow-card .step{
    font-size:15px;font-weight:800;color:var(--brand);
    display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;
  }
  .flow-card h3{font-size:18px;margin-bottom:8px}
  .flow-card p{font-size:14.5px;color:var(--text-lo);line-height:1.85}

  /* ============ FAQ ============ */
  .faq-list{display:flex;flex-direction:column;gap:12px}
  .faq-item{
    border-radius:18px;background:var(--glass);border:1px solid var(--line);
    backdrop-filter:blur(18px) saturate(140%);
    -webkit-backdrop-filter:blur(18px) saturate(140%);
    overflow:hidden;transition:border-color .22s var(--ease);
  }
  .faq-item:hover{border-color:rgba(22,224,168,.3)}
  .faq-item[open]{border-color:rgba(22,224,168,.4)}
  .faq-item summary{
    list-style:none;cursor:pointer;position:relative;
    padding:20px 58px 20px 22px;
    font-size:16px;font-weight:600;color:var(--text-hi);
    transition:color .18s var(--ease);
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary::before{
    content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:0 3px 3px 0;
    background:var(--line-strong);transition:background .22s var(--ease);
  }
  .faq-item[open] summary::before{background:var(--brand)}
  .faq-item summary:hover{color:var(--brand)}
  .faq-item summary .sign{
    position:absolute;right:20px;top:50%;transform:translateY(-50%);
    width:26px;height:26px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    background:rgba(255,255,255,.05);border:1px solid var(--line);
    color:var(--brand);font-size:14px;font-weight:700;
    transition:transform .26s var(--ease),background-color .2s var(--ease);
  }
  .faq-item[open] summary .sign{transform:translateY(-50%) rotate(45deg);background:rgba(22,224,168,.14)}
  .faq-body{padding:0 22px 22px;font-size:15px;color:var(--text);line-height:1.9}

  /* ============ 收口 CTA ============ */
  .cta-band{
    position:relative;overflow:hidden;
    border-radius:24px;
    padding:44px 28px;
    background-image:linear-gradient(rgba(5,8,15,.78),rgba(5,8,15,.92)),url('/assets/images/backpic/back-2.png');
    background-size:cover;background-position:center;
    border:1px solid var(--line-strong);
    box-shadow:var(--shadow-card);
  }
  @media (min-width:1024px){.cta-band{padding:60px 56px}}
  .cta-band h2{font-size:clamp(23px,2.6vw,32px);margin-bottom:12px}
  .cta-band p{font-size:15.5px;color:var(--text);max-width:46em;line-height:1.9}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:26px}

  /* ============ 页脚 ============ */
  .site-footer{
    background:var(--ink-900);
    border-top:1px solid var(--line);
    margin-top:24px;
    position:relative;
    background-image:linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px);
    background-size:40px 40px;
  }
  .footer-inner{padding:64px 0 28px}
  .footer-grid{display:grid;gap:36px}
  @media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:44px}}
  .footer-brand .fb-name{font-size:19px;font-weight:800;color:var(--text-hi);margin-bottom:12px}
  .footer-brand p{font-size:14px;color:var(--text-lo);line-height:1.9;max-width:34em}
  .social-row{display:flex;gap:12px;margin-top:20px}
  .social-row a{
    width:40px;height:40px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    background:rgba(255,255,255,.035);border:1px solid var(--line);
    color:var(--text-lo);font-size:15px;
    transition:all .2s var(--ease);
  }
  .social-row a:hover{color:var(--brand);border-color:rgba(22,224,168,.42);background:rgba(22,224,168,.08)}
  .footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text-hi)}
  .footer-col ul{display:flex;flex-direction:column;gap:11px}
  .footer-col a{
    font-size:14px;color:var(--text-lo);display:inline-block;
    transition:color .18s var(--ease),transform .18s var(--ease);
  }
  .footer-col a:hover{color:var(--brand);transform:translateX(2px)}
  .footer-bottom{
    margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
    display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;
    font-size:13px;color:var(--text-lo);
  }
  .footer-bottom .links{display:flex;gap:18px;flex-wrap:wrap}
  .footer-bottom .links a:hover{color:var(--brand)}

  /* 回到顶部 */
  .to-top{
    position:fixed;right:20px;bottom:24px;z-index:55;
    width:46px;height:46px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    background:var(--glass);border:1px solid var(--line);
    backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
    color:var(--text-hi);cursor:pointer;font-size:16px;
    opacity:0;pointer-events:none;transform:translateY(10px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
  }
  .to-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}
  .to-top:hover{color:var(--brand);border-color:rgba(22,224,168,.45)}

  /* 进场动画 */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
  .reveal.in{opacity:1;transform:none}
  @media (prefers-reduced-motion:reduce){
    *{animation:none!important;transition:none!important}
    .reveal{opacity:1;transform:none}
    html{scroll-behavior:auto}
  }

/* roulang page: category4 */
:root{
  --ink-900:#05080F;--ink-800:#080E1A;--ink-700:#0C1526;--surface:#101A2E;
  --glass:rgba(16,26,46,.55);
  --line:rgba(255,255,255,.08);--line-strong:rgba(255,255,255,.16);
  --brand:#16E0A8;--brand-deep:#0FB98A;--brand-glow:rgba(22,224,168,.35);
  --accent:#FF9A3C;--accent-soft:rgba(255,154,60,.14);--danger:#FF6B6B;
  --text-hi:#E8EEF7;--text:#C3CEDE;--text-lo:#7C8AA3;
  --r-card:20px;--r-sm:12px;--r-pill:999px;
  --shadow-card:0 20px 60px rgba(0,0,0,.55),inset 0 0 0 1px rgba(255,255,255,.06);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--ink-800);color:var(--text);
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.8;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--text-hi);font-weight:800;line-height:1.22;letter-spacing:.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:8px}
::selection{background:rgba(22,224,168,.28);color:#fff}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
@media(min-width:1024px){.container{padding:0 32px}}

/* ---------- header / nav ---------- */
.site-header{position:sticky;top:0;z-index:70;background:rgba(8,14,26,.55);backdrop-filter:blur(14px) saturate(130%);border-bottom:1px solid transparent;transition:background .25s var(--ease),border-color .25s var(--ease)}
.site-header.scrolled{background:rgba(8,14,26,.88);border-bottom-color:var(--line)}
.nav-inner{display:flex;align-items:center;gap:18px;height:74px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand-mark{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;font-size:15px;font-weight:800;letter-spacing:.02em;color:#04140F;background:linear-gradient(135deg,var(--brand),var(--brand-deep));box-shadow:0 8px 24px var(--brand-glow)}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text .l1{font-size:15px;font-weight:800;color:var(--text-hi);letter-spacing:.05em}
.brand-text .l2{font-size:11px;color:var(--text-lo);letter-spacing:.16em}
.nav-links{display:none;align-items:center;gap:2px;margin-left:auto}
.nav-links a{position:relative;padding:9px 14px;border-radius:var(--r-pill);font-size:14.5px;font-weight:500;color:var(--text);transition:color .2s var(--ease),background .2s var(--ease)}
.nav-links a::after{content:"";position:absolute;left:14px;right:14px;bottom:5px;height:2px;border-radius:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease)}
.nav-links a:hover{color:var(--brand);background:rgba(22,224,168,.07)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--brand)}
.nav-links a.active::before{content:"";position:absolute;left:1px;top:50%;width:4px;height:4px;border-radius:50%;background:var(--brand);transform:translateY(-50%)}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav-toggle{width:42px;height:42px;border-radius:14px;border:1px solid var(--line);display:grid;place-items:center;color:var(--text-hi);background:rgba(16,26,46,.5);transition:border-color .2s,color .2s}
.nav-toggle:hover{border-color:var(--line-strong);color:var(--brand)}
@media(min-width:1024px){
  .nav-links{display:flex}
  .nav-toggle{display:none}
  .nav-actions{margin-left:18px}
}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:42px;padding:0 20px;border-radius:var(--r-pill);font-size:14.5px;font-weight:700;white-space:nowrap;transition:transform .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease)}
.btn-primary{color:var(--brand);background:rgba(22,224,168,.12);border:1px solid rgba(22,224,168,.42);box-shadow:0 8px 28px var(--brand-glow)}
.btn-primary:hover{background:rgba(22,224,168,.22);transform:translateY(-1px);box-shadow:0 10px 34px var(--brand-glow)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 4px 16px var(--brand-glow)}
.btn-ghost{color:var(--text);background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(16px) saturate(140%)}
.btn-ghost:hover{color:var(--text-hi);border-color:var(--line-strong);background:rgba(16,26,46,.72)}
.btn-lg{height:52px;padding:0 28px;font-size:16px}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--brand);transition:gap .2s var(--ease),color .2s var(--ease)}
.text-link:hover{gap:10px;color:#4CF0C4}

/* drawer */
.nav-mask{position:fixed;inset:0;background:rgba(5,8,15,.6);opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s;z-index:80}
.nav-mask.on{opacity:1;visibility:visible}
.nav-drawer{position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;z-index:90;transform:translateX(102%);transition:transform .3s var(--ease);display:flex;flex-direction:column;gap:8px;padding:68px 20px 24px;background:rgba(12,21,38,.92);backdrop-filter:blur(20px) saturate(150%);border-left:1px solid var(--line)}
.nav-drawer.on{transform:translateX(0)}
.nav-drawer a.drawer-link{display:block;padding:14px 16px;border-radius:14px;font-size:16px;font-weight:600;color:var(--text);border:1px solid transparent;transition:background .2s,color .2s,border-color .2s}
.nav-drawer a.drawer-link:hover,.nav-drawer a.drawer-link.active{color:var(--brand);background:rgba(22,224,168,.08);border-color:rgba(22,224,168,.25)}
.drawer-close{position:absolute;top:18px;right:18px;width:38px;height:38px;border-radius:12px;border:1px solid var(--line);display:grid;place-items:center;color:var(--text-hi)}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px}
.drawer-foot .btn{width:100%}

/* ---------- hero ---------- */
.cat-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:linear-gradient(180deg,rgba(5,8,15,.9),rgba(8,14,26,.96)),url('/assets/images/backpic/back-1.webp') center/cover no-repeat}
.cat-hero::after{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:40px 40px;-webkit-mask-image:radial-gradient(120% 100% at 45% 0,#000 25%,transparent 78%);mask-image:radial-gradient(120% 100% at 45% 0,#000 25%,transparent 78%)}
.cat-hero .inner{position:relative;z-index:1;display:grid;gap:26px;padding:52px 0 48px}
@media(min-width:1024px){.cat-hero .inner{grid-template-columns:1.18fr .82fr;gap:52px;align-items:end;padding:78px 0 68px}}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-lo)}
.crumb a{color:var(--text-lo);transition:color .2s}
.crumb a:hover{color:var(--brand)}
.crumb span.sep{opacity:.5}
.crumb .now{color:var(--brand)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:var(--r-pill);font-size:12.5px;font-weight:700;letter-spacing:.06em;color:var(--brand);background:rgba(22,224,168,.1);border:1px solid rgba(22,224,168,.3)}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand);display:inline-block}
.cat-hero h1{margin-top:16px;font-size:clamp(30px,4.2vw,52px);line-height:1.15;letter-spacing:.01em}
.cat-hero h1 em{font-style:normal;color:var(--brand)}
.hero-note{display:flex;flex-direction:column;gap:14px}
.hero-note p{font-size:15.5px;color:var(--text);max-width:40ch}
.hero-facts{display:flex;flex-wrap:wrap;gap:12px;margin-top:6px}
.fact{display:flex;flex-direction:column;gap:2px;padding:12px 18px;border-radius:16px;background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(16px) saturate(140%)}
.fact b{font-size:19px;color:var(--text-hi);font-variant-numeric:tabular-nums}
.fact span{font-size:12px;color:var(--text-lo)}

/* ---------- generic section ---------- */
.section{padding:56px 0}
@media(min-width:1024px){.section{padding:96px 0}}
.section.alt{background:var(--ink-700);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:28px}
.sec-head h2{font-size:clamp(24px,2.6vw,32px)}
.sec-head p{margin-top:8px;font-size:14.5px;color:var(--text-lo);max-width:62ch}

/* filter pills */
.pills{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.pill{display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:var(--r-pill);font-size:13.5px;font-weight:600;color:var(--text);background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(14px);transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease),transform .2s var(--ease)}
.pill:hover{color:var(--text-hi);border-color:var(--line-strong);transform:translateY(-1px)}
.pill.on{color:#04140F;background:var(--brand);border-color:var(--brand);box-shadow:0 8px 24px var(--brand-glow)}

/* cards grid */
.grid-cards{display:grid;gap:22px;grid-template-columns:1fr}
@media(min-width:640px){.grid-cards{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1200px){.grid-cards{grid-template-columns:repeat(4,1fr)}}
.card{position:relative;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-card);transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease)}
.card:hover{transform:translateY(-6px);border-color:rgba(22,224,168,.4)}
.card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--ink-700)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.card:hover .card-media img{transform:scale(1.04)}
.card-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,8,15,0) 40%,rgba(5,8,15,.78) 100%)}
.card-body{display:flex;flex-direction:column;gap:10px;padding:18px 20px 22px;flex:1}
.card-body h3{font-size:18px;line-height:1.35;transition:color .2s}
.card:hover .card-body h3{color:var(--brand)}
.card-body p{font-size:14px;color:var(--text-lo)}
.tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);font-size:12px;font-weight:600;color:var(--brand);background:rgba(22,224,168,.1);border:1px solid rgba(22,224,168,.28)}
.tag.warm{color:var(--accent);background:var(--accent-soft);border-color:rgba(255,154,60,.3)}
.tag.mute{color:var(--text-lo);background:rgba(255,255,255,.05);border-color:var(--line)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;padding-top:6px}

/* faq layout */
.faq-layout{display:grid;gap:26px;grid-template-columns:1fr}
@media(min-width:1024px){.faq-layout{grid-template-columns:1.42fr .78fr;gap:34px;align-items:start}}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{border:1px solid var(--line);border-radius:16px;background:var(--glass);backdrop-filter:blur(18px) saturate(140%);overflow:hidden;transition:border-color .22s var(--ease),background .22s var(--ease)}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item.open{border-color:rgba(22,224,168,.35);background:rgba(16,26,46,.75)}
.faq-q{position:relative;width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:18px 20px 18px 22px;text-align:left;font-size:16.5px;font-weight:700;color:var(--text-hi);line-height:1.5}
.faq-q::before{content:"";position:absolute;left:0;top:15px;bottom:15px;width:3px;border-radius:0 3px 3px 0;background:var(--line-strong);transition:background .22s var(--ease)}
.faq-item.open .faq-q::before{background:var(--brand);box-shadow:0 0 14px var(--brand-glow)}
.faq-icon{flex:none;width:26px;height:26px;border-radius:50%;border:1px solid var(--line-strong);display:grid;place-items:center;font-size:13px;color:var(--brand);transition:transform .26s var(--ease),border-color .22s}
.faq-item.open .faq-icon{transform:rotate(45deg);border-color:rgba(22,224,168,.5)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s var(--ease)}
.faq-item.open .faq-a{max-height:420px}
.faq-a .inner{padding:0 20px 20px 22px;font-size:14.5px;color:var(--text)}
.faq-a .inner p+p{margin-top:8px}
.faq-side{display:flex;flex-direction:column;gap:20px}
.side-card{padding:22px;border-radius:var(--r-card);background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(18px) saturate(140%);box-shadow:var(--shadow-card)}
.side-card h3{font-size:18px;margin-bottom:14px}
.check-list{display:flex;flex-direction:column;gap:12px}
.check-list li{display:flex;gap:10px;font-size:14px;color:var(--text)}
.check-list i{flex:none;margin-top:6px;width:16px;height:16px;border-radius:5px;display:grid;place-items:center;font-size:9px;color:#04140F;background:var(--brand)}
.side-cta{position:relative;overflow:hidden;background:linear-gradient(160deg,rgba(22,224,168,.16),rgba(16,26,46,.85));border-color:rgba(22,224,168,.3)}
.side-cta p{font-size:14px;color:var(--text);margin-bottom:16px}
.side-cta .btn{width:100%}

/* steps */
.steps{display:grid;gap:18px;grid-template-columns:1fr}
@media(min-width:768px){.steps{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1200px){.steps{grid-template-columns:repeat(4,1fr)}}
.step{position:relative;padding:24px 22px;border-radius:var(--r-card);background:var(--ink-700);border:1px solid var(--line);transition:border-color .24s var(--ease),transform .24s var(--ease)}
.step:hover{border-color:rgba(22,224,168,.4);transform:translateY(-4px)}
.step-num{font-size:46px;font-weight:800;line-height:1;color:transparent;-webkit-text-stroke:1.4px rgba(22,224,168,.6);letter-spacing:.02em}
.step h3{margin-top:14px;font-size:18px}
.step p{margin-top:8px;font-size:14px;color:var(--text-lo)}

/* self-check cards */
.grid-three{display:grid;gap:22px;grid-template-columns:1fr}
@media(min-width:768px){.grid-three{grid-template-columns:repeat(3,1fr)}}
.check-card{padding:24px;border-radius:var(--r-card);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-card);transition:transform .24s var(--ease),border-color .24s var(--ease)}
.check-card:hover{transform:translateY(-5px);border-color:rgba(255,154,60,.35)}
.check-card .ic{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;font-size:17px;color:var(--accent);background:var(--accent-soft);border:1px solid rgba(255,154,60,.28);margin-bottom:16px}
.check-card h3{font-size:17.5px;margin-bottom:10px}
.check-card p{font-size:14px;color:var(--text-lo)}

/* notice band */
.notice{display:grid;gap:24px;grid-template-columns:1fr;padding:28px;border-radius:var(--r-card);background:var(--ink-700);border:1px solid var(--line)}
@media(min-width:1024px){.notice{grid-template-columns:repeat(3,1fr);gap:32px;padding:36px}}
.notice-item h3{font-size:16.5px;margin-bottom:10px}
.notice-item h3 i{color:var(--brand);margin-right:8px}
.notice-item p{font-size:14px;color:var(--text-lo)}

/* cta band */
.cta-band{position:relative;overflow:hidden;background:linear-gradient(180deg,rgba(5,8,15,.78),rgba(5,8,15,.86)),url('/assets/images/backpic/back-3.webp') center/cover no-repeat;border-top:1px solid var(--line)}
.cta-inner{position:relative;z-index:1;display:grid;gap:22px;padding:64px 0;text-align:center;justify-items:center}
@media(min-width:1024px){.cta-inner{padding:92px 0}}
.cta-inner h2{font-size:clamp(25px,3vw,36px);max-width:22ch}
.cta-inner p{font-size:15px;color:var(--text);max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

/* back to top */
.to-top{position:fixed;right:18px;bottom:22px;z-index:60;width:44px;height:44px;border-radius:50%;display:grid;place-items:center;color:var(--text-hi);background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(16px);opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s,color .2s,border-color .2s}
.to-top.on{opacity:1;visibility:visible}
.to-top:hover{color:var(--brand);border-color:rgba(22,224,168,.5)}

/* footer */
.site-footer{margin-top:0;background:var(--ink-900);border-top:1px solid var(--line);position:relative}
.site-footer::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:48px 48px;-webkit-mask-image:radial-gradient(100% 120% at 20% 0,#000 20%,transparent 75%);mask-image:radial-gradient(100% 120% at 20% 0,#000 20%,transparent 75%)}
.footer-inner{position:relative;z-index:1;padding:60px 0 26px}
.footer-grid{display:grid;gap:34px;grid-template-columns:1fr}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}}
.fb-name{font-size:18px;font-weight:800;color:var(--text-hi);letter-spacing:.03em;margin-bottom:12px}
.footer-brand p{font-size:14px;color:var(--text-lo);max-width:34ch}
.social-row{display:flex;gap:10px;margin-top:18px}
.social-row a{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;color:var(--text-lo);background:rgba(255,255,255,.04);border:1px solid var(--line);transition:color .2s,border-color .2s,transform .2s}
.social-row a:hover{color:var(--brand);border-color:rgba(22,224,168,.45);transform:translateY(-2px)}
.footer-col h4{font-size:14px;color:var(--text-hi);letter-spacing:.08em;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:14px;color:var(--text-lo);transition:color .2s var(--ease),transform .2s var(--ease);display:inline-block}
.footer-col a:hover{color:var(--brand);transform:translateX(2px)}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;margin-top:44px;padding-top:22px;border-top:1px solid var(--line);font-size:13px;color:var(--text-lo)}
.footer-bottom .links{display:flex;flex-wrap:wrap;gap:18px}
.footer-bottom .links a{transition:color .2s}
.footer-bottom .links a:hover{color:var(--brand)}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}