/* roulang page: index */
:root{
  --bg-deep:#060A14;
  --bg-base:#0A1022;
  --bg-elev:#101A33;
  --primary:#2FD3FF;
  --primary-strong:#00A3FF;
  --secondary:#8B5CF6;
  --accent:#FFB020;
  --success:#35E0A1;
  --text-1:#EAF2FF;
  --text-2:#A9B8D6;
  --line:rgba(80,160,255,.18);
  --glow:0 0 24px rgba(47,211,255,.35);
  --radius-card:20px;
  --radius-btn:13px;
  --radius-img:16px;
  --shadow-card:0 10px 30px rgba(0,0,0,.35);
  --shadow-soft:0 6px 18px rgba(0,0,0,.28);
  --space-section:88px;
  --header-h:68px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  padding-top:var(--header-h);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text-1);
  background:
    radial-gradient(900px 620px at 10% -12%, rgba(47,211,255,.16), transparent 62%),
    radial-gradient(820px 600px at 102% 2%, rgba(139,92,246,.15), transparent 60%),
    radial-gradient(760px 700px at 48% 118%, rgba(0,163,255,.12), transparent 62%),
    linear-gradient(180deg,#070C18 0%, #060A14 42%, #050912 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    repeating-linear-gradient(0deg, rgba(80,160,255,.055) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(90deg, rgba(80,160,255,.055) 0 1px, transparent 1px 64px);
  mask-image:radial-gradient(circle at 50% 22%, #000 0%, transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 22%, #000 0%, transparent 78%);
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .22s ease,opacity .22s ease;}
a:hover{color:#8FE6FF;}
h1,h2,h3,h4{font-weight:800;line-height:1.28;color:var(--text-1);margin:0;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;box-shadow:0 0 0 4px rgba(47,211,255,.22);border-radius:8px;}
::selection{background:rgba(47,211,255,.32);color:#fff;}

.container{width:100%;max-width:1240px;margin:0 auto;padding-left:20px;padding-right:20px;}
.section{padding:var(--space-section) 0;position:relative;z-index:1;}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--primary);font-weight:700;
  padding:7px 15px;border-radius:999px;
  border:1px solid rgba(47,211,255,.28);
  background:rgba(47,211,255,.07);
  margin-bottom:18px;
}
.eyebrow i{font-size:11px;}
.section-title{font-size:clamp(1.55rem,2.6vw,2.05rem);margin-bottom:14px;}
.section-sub{color:var(--text-2);font-size:16px;max-width:680px;}
.center .section-sub{margin-left:auto;margin-right:auto;}

/* Header */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1040;
  height:var(--header-h);
  background:rgba(6,10,20,.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.header-inner{height:var(--header-h);display:flex;align-items:center;justify-content:space-between;gap:20px;}
.brand{display:flex;align-items:center;gap:11px;color:var(--text-1);font-weight:800;font-size:17px;letter-spacing:.01em;white-space:nowrap;}
.brand:hover{color:#fff;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;flex:0 0 36px;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  color:#04131f;font-size:16px;
  box-shadow:0 0 18px rgba(47,211,255,.45);
}
.brand-text{background:linear-gradient(90deg,#EAF2FF 0%,#9FE4FF 100%);-webkit-background-clip:text;background-clip:text;color:transparent;}
.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;display:inline-block;
  padding:10px 14px;border-radius:10px;
  color:var(--text-2);font-size:15px;font-weight:600;
  transition:color .22s ease,background .22s ease;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  transform:scaleX(0);transform-origin:left;transition:transform .28s ease;
  box-shadow:0 0 10px rgba(47,211,255,.8);
}
.nav-link:hover{color:#fff;background:rgba(47,211,255,.07);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:#fff;}
.nav-link.active::after{transform:scaleX(1);}
.nav-link.active::before{
  content:"";position:absolute;left:50%;top:4px;width:5px;height:5px;margin-left:-2.5px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 10px 2px rgba(47,211,255,.85);
}
.header-cta{margin-left:8px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:rgba(47,211,255,.07);color:var(--text-1);
  font-size:17px;align-items:center;justify-content:center;cursor:pointer;
  transition:background .22s ease,border-color .22s ease;
}
.nav-toggle:hover{background:rgba(47,211,255,.16);border-color:rgba(47,211,255,.5);}

/* Buttons */
.btn-glow,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:12px 24px;min-height:44px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:700;letter-spacing:.02em;cursor:pointer;
  border:1px solid transparent;transition:transform .24s ease,box-shadow .24s ease,background .24s ease,border-color .24s ease,color .24s ease;
}
.btn-glow{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-strong) 100%);color:#03121f;box-shadow:0 8px 22px rgba(0,163,255,.28);}
.btn-glow:hover{color:#03121f;transform:translateY(-2px);box-shadow:0 10px 30px rgba(47,211,255,.55);}
.btn-glow:active{transform:translateY(0);}
.btn-ghost{background:rgba(47,211,255,.05);border-color:rgba(47,211,255,.45);color:var(--text-1);}
.btn-ghost:hover{background:rgba(47,211,255,.15);border-color:var(--primary);color:#fff;transform:translateY(-2px);}
.btn-sm{padding:9px 18px;font-size:14px;min-height:38px;}
.btn-block{width:100%;}
.btn-glow[disabled],.btn-ghost[disabled]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

/* Hero */
.hero{
  position:relative;min-height:640px;display:flex;align-items:center;
  padding:96px 0 80px;overflow:hidden;
  background-image:
    linear-gradient(100deg, rgba(6,10,20,.94) 0%, rgba(8,14,30,.82) 46%, rgba(6,10,20,.62) 100%),
    url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:180px;
  background:linear-gradient(180deg,transparent,rgba(6,10,20,.92));
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;max-width:820px;}
.hero h1{font-size:clamp(2rem,4vw,3.35rem);margin:0 0 20px;letter-spacing:-.01em;}
.hero h1 .hl{background:linear-gradient(100deg,var(--primary),#A78BFA 70%);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-lead{font-size:17px;color:var(--text-2);max-width:640px;margin-bottom:32px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:46px;}
.hero-actions .btn-glow,.hero-actions .btn-ghost{padding:14px 30px;font-size:16px;}
.stat-bar{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;
  padding:20px;border-radius:var(--radius-card);
  background:rgba(16,26,48,.66);border:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
}
.stat-item{padding-left:14px;border-left:2px solid rgba(47,211,255,.32);}
.stat-item:first-child{border-left-color:rgba(47,211,255,.32);}
.stat-num{font-family:"DIN Alternate","Bahnschrift",Arial,sans-serif;font-size:24px;font-weight:800;color:var(--primary);letter-spacing:.01em;line-height:1.2;}
.stat-num small{font-size:13px;color:var(--text-2);font-weight:600;margin-left:4px;}
.stat-label{font-size:13px;color:var(--text-2);margin-top:4px;}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;margin-bottom:22px;
  padding:7px 16px;border-radius:999px;font-size:13px;font-weight:700;letter-spacing:.06em;
  color:#B8F0FF;background:rgba(47,211,255,.1);border:1px solid rgba(47,211,255,.34);
}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--success);box-shadow:0 0 10px 2px rgba(53,224,161,.8);}

/* Entry cards */
.entry-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.entry-card{
  position:relative;display:flex;flex-direction:column;gap:12px;
  padding:26px;border-radius:var(--radius-card);
  background:rgba(16,26,48,.72);border:1px solid var(--line);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-soft);
  transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
  overflow:hidden;
}
.entry-card::before{
  content:"";position:absolute;top:0;left:0;width:100%;height:2px;
  background:linear-gradient(90deg,var(--primary),transparent 70%);
  opacity:.55;transition:opacity .28s ease;
}
.entry-card:hover{transform:translateY(-6px);border-color:rgba(47,211,255,.45);box-shadow:0 18px 40px rgba(0,0,0,.45),var(--glow);}
.entry-card:hover::before{opacity:1;}
.entry-icon{
  width:46px;height:46px;border-radius:14px;display:grid;place-items:center;font-size:18px;
  color:#03121f;background:linear-gradient(135deg,var(--primary),var(--secondary));
  box-shadow:0 0 18px rgba(47,211,255,.4);
}
.entry-card h3{font-size:1.15rem;}
.entry-card p{color:var(--text-2);font-size:15px;}
.entry-link{display:inline-flex;align-items:center;gap:7px;font-weight:700;font-size:14px;color:var(--primary);margin-top:auto;}
.entry-link i{transition:transform .24s ease;}
.entry-card:hover .entry-link i{transform:translateX(4px);}
.entry-grid .entry-card:nth-child(2){transform:translateY(22px);}
.entry-grid .entry-card:nth-child(2):hover{transform:translateY(16px);}
.entry-grid .entry-card:nth-child(4){transform:translateY(22px);}
.entry-grid .entry-card:nth-child(4):hover{transform:translateY(16px);}

/* Feature rows */
.feature-row{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;margin-bottom:70px;}
.feature-row:last-child{margin-bottom:0;}
.feature-row.reverse .feature-media{order:2;}
.feature-row.reverse .feature-copy{order:1;}
.feature-media{position:relative;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card);}
.feature-media img{width:100%;height:340px;object-fit:cover;transition:transform .6s ease;}
.feature-media:hover img{transform:scale(1.04);}
.feature-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,20,0) 40%,rgba(6,10,20,.7) 100%);
}
.feature-step{
  display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:700;letter-spacing:.12em;
  color:var(--accent);margin-bottom:14px;
}
.feature-step span{display:grid;place-items:center;width:26px;height:26px;border-radius:9px;background:rgba(255,176,32,.14);border:1px solid rgba(255,176,32,.4);font-size:12px;letter-spacing:0;}
.feature-copy h3{font-size:1.35rem;margin-bottom:12px;}
.feature-copy p{color:var(--text-2);font-size:15.5px;margin-bottom:18px;}
.feature-list li{display:flex;gap:10px;align-items:flex-start;color:var(--text-2);font-size:15px;padding:7px 0;}
.feature-list i{color:var(--primary);margin-top:6px;font-size:13px;}

/* Benefits */
.benefit-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.benefit-card{
  border-radius:var(--radius-card);overflow:hidden;
  background:rgba(16,26,48,.7);border:1px solid var(--line);
  box-shadow:var(--shadow-soft);
  transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
  display:flex;flex-direction:column;
}
.benefit-card:hover{transform:translateY(-6px);border-color:rgba(47,211,255,.42);box-shadow:0 18px 40px rgba(0,0,0,.45),var(--glow);}
.benefit-thumb{position:relative;height:170px;overflow:hidden;}
.benefit-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease;}
.benefit-card:hover .benefit-thumb img{transform:scale(1.06);}
.benefit-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,10,20,.05),rgba(10,16,34,.85));}
.badge-tag{
  position:absolute;left:14px;top:14px;z-index:2;
  padding:5px 12px;border-radius:999px;font-size:12px;font-weight:700;letter-spacing:.04em;
  background:rgba(6,10,20,.72);border:1px solid rgba(47,211,255,.4);color:var(--primary);
  backdrop-filter:blur(8px);
}
.badge-tag.amber{color:var(--accent);border-color:rgba(255,176,32,.45);}
.badge-tag.violet{color:#C4B5FD;border-color:rgba(139,92,246,.5);}
.benefit-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.benefit-body h3{font-size:1.1rem;}
.benefit-body p{color:var(--text-2);font-size:14.5px;}
.benefit-body .entry-link{margin-top:auto;padding-top:6px;}

/* Progress track */
.progress-panel{
  padding:38px 30px;border-radius:var(--radius-card);
  background:linear-gradient(140deg,rgba(16,26,48,.9),rgba(10,16,34,.72));
  border:1px solid var(--line);box-shadow:var(--shadow-card);
  backdrop-filter:blur(14px);
}
.track{position:relative;margin-top:44px;}
.track-line{position:absolute;left:0;right:0;top:9px;height:4px;border-radius:4px;background:rgba(80,160,255,.16);overflow:hidden;}
.track-line span{display:block;height:100%;width:68%;border-radius:4px;background:linear-gradient(90deg,var(--primary),var(--secondary));box-shadow:0 0 16px rgba(47,211,255,.7);}
.track-nodes{position:relative;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;}
.track-node{text-align:center;padding-top:0;}
.node-dot{
  width:22px;height:22px;border-radius:50%;margin:0 auto 16px;display:grid;place-items:center;
  background:var(--bg-elev);border:2px solid rgba(80,160,255,.35);position:relative;z-index:2;
}
.node-dot i{font-size:10px;color:var(--text-2);}
.track-node.done .node-dot{border-color:var(--success);background:rgba(53,224,161,.16);box-shadow:0 0 14px rgba(53,224,161,.55);}
.track-node.done .node-dot i{color:var(--success);}
.track-node.now .node-dot{border-color:var(--primary);background:rgba(47,211,255,.2);box-shadow:0 0 16px 2px rgba(47,211,255,.65);}
.track-node.now .node-dot i{color:var(--primary);}
.track-node h4{font-size:15px;margin-bottom:6px;font-weight:700;}
.track-node p{font-size:13.5px;color:var(--text-2);}

/* News / CMS */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.news-card{
  display:flex;flex-direction:column;border-radius:var(--radius-card);overflow:hidden;
  background:rgba(16,26,48,.7);border:1px solid var(--line);
  box-shadow:var(--shadow-soft);
  transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.news-card:hover{transform:translateY(-6px);border-color:rgba(47,211,255,.42);box-shadow:0 18px 40px rgba(0,0,0,.45),var(--glow);}
.news-thumb{height:168px;overflow:hidden;}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease;}
.news-card:hover .news-thumb img{transform:scale(1.05);}
.news-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:12.5px;color:var(--text-2);}
.news-cat{
  padding:4px 10px;border-radius:999px;font-weight:700;
  color:var(--primary);background:rgba(47,211,255,.1);border:1px solid rgba(47,211,255,.3);
}
.news-card h3{font-size:1.06rem;line-height:1.5;}
.news-card h3 a{color:var(--text-1);}
.news-card h3 a:hover{color:var(--primary);}
.news-card p{color:var(--text-2);font-size:14.5px;}
.empty-state{
  grid-column:1 / -1;padding:52px 24px;border-radius:var(--radius-card);text-align:center;
  background:rgba(16,26,48,.55);border:1px dashed rgba(80,160,255,.3);color:var(--text-2);
}
.empty-state i{font-size:26px;color:var(--primary);display:block;margin-bottom:14px;}
.news-more{display:flex;justify-content:center;margin-top:38px;}

/* FAQ */
.faq-wrap{max-width:860px;margin:0 auto;}
.accordion-item{
  background:rgba(16,26,48,.68) !important;
  border:1px solid var(--line) !important;
  border-radius:var(--radius-card) !important;
  margin-bottom:14px;overflow:hidden;
}
.accordion-button{
  background:transparent !important;color:var(--text-1) !important;
  font-weight:700;font-size:16px;padding:20px 22px;box-shadow:none !important;
}
.accordion-button:not(.collapsed){color:var(--primary) !important;background:rgba(47,211,255,.06) !important;}
.accordion-button:focus{box-shadow:none !important;border-color:transparent !important;}
.accordion-button::after{
  filter:invert(85%) sepia(40%) saturate(1600%) hue-rotate(150deg);
  opacity:.85;
}
.accordion-body{color:var(--text-2);font-size:15px;padding:4px 22px 22px;line-height:1.85;}

/* CTA */
.cta-band{
  position:relative;overflow:hidden;
  padding:52px 44px;border-radius:26px;
  background:
    linear-gradient(120deg, rgba(10,16,34,.9), rgba(16,26,48,.86)),
    url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  border:1px solid rgba(47,211,255,.26);
  box-shadow:var(--shadow-card);
  display:flex;align-items:center;justify-content:space-between;gap:34px;flex-wrap:wrap;
}
.cta-band::after{
  content:"";position:absolute;right:-90px;top:-90px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,211,255,.28),transparent 68%);
}
.cta-copy{position:relative;z-index:2;max-width:640px;}
.cta-copy h2{font-size:clamp(1.4rem,2.4vw,1.9rem);margin-bottom:12px;}
.cta-copy p{color:var(--text-2);font-size:15.5px;}
.cta-actions{position:relative;z-index:2;display:flex;gap:14px;flex-wrap:wrap;}

/* Footer */
.site-footer{
  position:relative;z-index:1;margin-top:20px;
  border-top:1px solid var(--line);
  background:rgba(6,10,20,.82);
  padding:64px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:38px;}
.footer-brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:17px;margin-bottom:16px;color:var(--text-1);}
.footer-desc{color:var(--text-2);font-size:14.5px;max-width:330px;}
.footer-title{font-size:15px;font-weight:800;margin-bottom:16px;color:var(--text-1);letter-spacing:.02em;}
.footer-links li{margin-bottom:11px;}
.footer-links a{color:var(--text-2);font-size:14.5px;}
.footer-links a:hover{color:var(--primary);}
.footer-note{color:var(--text-2);font-size:14.5px;line-height:1.9;}
.footer-bottom{
  margin-top:46px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  color:var(--text-2);font-size:13.5px;
}
.footer-bottom a{color:var(--text-2);}
.footer-bottom a:hover{color:var(--primary);}

/* Reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease;}
.reveal.in{opacity:1;transform:none;}

@media (max-width:1024px){
  :root{--space-section:64px;}
  .feature-row{grid-template-columns:1fr;gap:28px;margin-bottom:56px;}
  .feature-row.reverse .feature-media{order:1;}
  .feature-row.reverse .feature-copy{order:2;}
  .feature-media img{height:280px;}
  .benefit-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:991px){
  .nav-toggle{display:inline-flex;}
  .main-nav{
    position:fixed;left:0;right:0;top:var(--header-h);bottom:0;
    flex-direction:column;align-items:stretch;gap:0;
    padding:22px 22px 60px;overflow-y:auto;
    background:rgba(6,10,20,.97);
    backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
    transform:translateX(100%);transition:transform .32s ease;
    border-top:1px solid var(--line);
  }
  .main-nav.open{transform:translateX(0);}
  .nav-link{padding:17px 4px;font-size:16.5px;border-bottom:1px solid var(--line);border-radius:0;}
  .nav-link::after,.nav-link::before{display:none;}
  .nav-link.active{color:var(--primary);}
  .header-cta{display:none;}
  .hero{min-height:auto;padding:72px 0 64px;}
  .stat-bar{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
  .entry-grid{grid-template-columns:1fr;}
  .entry-grid .entry-card:nth-child(2),.entry-grid .entry-card:nth-child(4){transform:none;}
  .entry-grid .entry-card:nth-child(2):hover,.entry-grid .entry-card:nth-child(4):hover{transform:translateY(-6px);}
  .track-nodes{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px;}
  .track-line{display:none;}
  .cta-band{padding:38px 26px;flex-direction:column;align-items:flex-start;}
}
@media (max-width:768px){
  .section{padding:52px 0;}
  .benefit-grid{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .hero-lead{font-size:15.5px;}
  .feature-media img{height:230px;}
}
@media (max-width:520px){
  body{font-size:15.5px;}
  .stat-bar{grid-template-columns:1fr;gap:14px;}
  .stat-item{border-left:none;border-top:2px solid rgba(47,211,255,.28);padding:10px 0 0;}
  .stat-item:first-child{border-top-color:rgba(47,211,255,.28);}
  .hero-actions{flex-direction:column;}
  .hero-actions .btn-glow,.hero-actions .btn-ghost{width:100%;}
  .track-nodes{grid-template-columns:1fr;}
  .brand-text{font-size:15.5px;}
  .cta-actions{width:100%;}
  .cta-actions .btn-glow,.cta-actions .btn-ghost{width:100%;}
}

/* roulang page: category1 */
:root{
  --bg-deep:#060A14;
  --bg-base:#0A1022;
  --bg-elev:#101A33;
  --primary:#2FD3FF;
  --primary-strong:#00A3FF;
  --secondary:#8B5CF6;
  --accent:#FFB020;
  --success:#35E0A1;
  --text-1:#EAF2FF;
  --text-2:#A9B8D6;
  --line:rgba(80,160,255,.18);
  --glow:0 0 24px rgba(47,211,255,.35);
  --glow-soft:0 0 24px rgba(47,211,255,.22);
  --glass:rgba(16,26,48,.72);
  --radius-xl:22px;
  --radius-lg:18px;
  --radius-md:14px;
  --radius-sm:12px;
  --shadow-card:0 10px 30px rgba(0,0,0,.35);
  --container:1240px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text-1);
  background-color:var(--bg-deep);
  background-image:
    radial-gradient(900px 520px at 12% -8%, rgba(47,211,255,.16), transparent 62%),
    radial-gradient(760px 460px at 88% 4%, rgba(139,92,246,.18), transparent 60%),
    radial-gradient(1100px 700px at 50% 110%, rgba(0,163,255,.14), transparent 65%),
    linear-gradient(180deg, #060A14 0%, #0A1022 45%, #070D1B 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(80,160,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(80,160,255,.045) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 30%, #000 20%, transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%, #000 20%, transparent 78%);
}
a{color:var(--primary);text-decoration:none;transition:color .2s ease, opacity .2s ease;}
a:hover{color:#7FE6FF;}
img{max-width:100%;height:auto;display:block;}
button,input,textarea,select{font-family:inherit;}
h1,h2,h3,h4{font-weight:800;line-height:1.28;margin:0 0 .6em;letter-spacing:.2px;}
p{margin:0 0 1em;}
ul{padding-left:1.1rem;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;box-shadow:var(--glow);border-radius:6px;}

.container{max-width:var(--container);width:100%;padding-left:20px;padding-right:20px;margin:0 auto;position:relative;z-index:1;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(6,10,20,.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  min-height:68px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text-1);
  font-weight:800;
  font-size:1.06rem;
  letter-spacing:.3px;
  flex-shrink:0;
}
.brand:hover{color:#fff;}
.brand-mark{
  width:36px;height:36px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:11px;
  background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);
  color:#04121F;
  font-size:.95rem;
  box-shadow:var(--glow);
}
.brand-text{white-space:nowrap;}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.main-nav .nav-link{
  position:relative;
  padding:9px 14px;
  color:var(--text-2);
  font-size:.95rem;
  font-weight:500;
  border-radius:10px;
  white-space:nowrap;
  transition:color .2s ease, background .2s ease;
}
.main-nav .nav-link::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .25s ease;
  box-shadow:var(--glow);
}
.main-nav .nav-link:hover{color:var(--text-1);background:rgba(47,211,255,.07);}
.main-nav .nav-link:hover::after{transform:scaleX(1);}
.main-nav .nav-link.active{color:#fff;background:rgba(47,211,255,.1);}
.main-nav .nav-link.active::after{transform:scaleX(1);}
.main-nav .nav-link.active::before{
  content:"";
  position:absolute;
  top:6px;right:6px;
  width:5px;height:5px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 10px var(--primary);
}
.btn-glow{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 22px;
  border-radius:13px;
  font-size:.95rem;
  font-weight:700;
  color:#04121F;
  background:linear-gradient(135deg,#5BE2FF 0%,var(--primary-strong) 100%);
  border:1px solid rgba(120,230,255,.5);
  box-shadow:0 8px 26px rgba(0,163,255,.32);
  transition:transform .2s ease, box-shadow .2s ease, filter .2s ease;
  min-height:44px;
}
.btn-glow:hover{
  color:#031019;
  transform:translateY(-2px);
  box-shadow:0 12px 34px rgba(47,211,255,.5), var(--glow);
  filter:brightness(1.06);
}
.btn-glow:active{transform:translateY(0);}
.btn-glow.btn-sm{padding:9px 16px;font-size:.9rem;border-radius:11px;}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 22px;
  border-radius:13px;
  font-size:.95rem;
  font-weight:600;
  color:var(--text-1);
  background:transparent;
  border:1px solid rgba(47,211,255,.45);
  transition:background .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease;
  min-height:44px;
}
.btn-ghost:hover{
  color:#fff;
  background:rgba(47,211,255,.12);
  border-color:var(--primary);
  transform:translateY(-2px);
  box-shadow:var(--glow-soft);
}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  background:rgba(47,211,255,.1);
  border:1px solid var(--line);
  color:var(--text-1);
  font-size:1.05rem;
  cursor:pointer;
}
.nav-toggle:hover{background:rgba(47,211,255,.2);}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding:64px 0 56px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  opacity:.30;
  z-index:0;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(6,10,20,.72) 0%, rgba(6,10,20,.9) 60%, var(--bg-deep) 100%);
  z-index:0;
}
.breadcrumb-nav{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:.86rem;
  color:var(--text-2);
  margin-bottom:20px;
}
.breadcrumb-nav a{color:var(--text-2);}
.breadcrumb-nav a:hover{color:var(--primary);}
.breadcrumb-nav .sep{opacity:.5;}
.breadcrumb-nav .current{color:var(--primary);font-weight:600;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:999px;
  font-size:.82rem;
  font-weight:600;
  letter-spacing:.6px;
  color:var(--primary);
  background:rgba(47,211,255,.1);
  border:1px solid rgba(47,211,255,.32);
  margin-bottom:18px;
}
.page-hero h1{
  font-size:clamp(1.8rem,3.6vw,2.9rem);
  max-width:900px;
  margin-bottom:18px;
}
.page-hero h1 .hl{
  background:linear-gradient(120deg,var(--primary),var(--secondary));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-sub{
  max-width:760px;
  font-size:1.03rem;
  color:var(--text-2);
  margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
.hero-stats{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:14px;
  max-width:920px;
}
.stat-item{
  padding:16px 18px;
  border-radius:var(--radius-lg);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.stat-item:hover{border-color:rgba(47,211,255,.5);transform:translateY(-3px);box-shadow:var(--glow-soft);}
.stat-num{
  font-size:1.35rem;
  font-weight:800;
  color:var(--primary);
  letter-spacing:.5px;
  display:block;
  margin-bottom:2px;
}
.stat-label{font-size:.85rem;color:var(--text-2);}

/* ---------- Sections ---------- */
.section{padding:76px 0;position:relative;}
.section-alt{
  background:linear-gradient(180deg, rgba(16,26,48,.55) 0%, rgba(10,16,34,.2) 100%);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section-head{max-width:760px;margin-bottom:38px;}
.section-head h2{
  font-size:clamp(1.4rem,2.4vw,1.85rem);
  margin-bottom:12px;
}
.section-head p{color:var(--text-2);margin-bottom:0;}
.section-tag{
  display:inline-block;
  font-size:.8rem;
  font-weight:700;
  letter-spacing:1.4px;
  color:var(--secondary);
  margin-bottom:10px;
  text-transform:uppercase;
}

/* ---------- Anchor Nav ---------- */
.anchor-nav{
  position:sticky;
  top:92px;
  padding:22px;
  border-radius:var(--radius-xl);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
}
.anchor-nav h3{
  font-size:.95rem;
  color:var(--text-2);
  font-weight:600;
  letter-spacing:.8px;
  margin-bottom:14px;
}
.anchor-nav ul{list-style:none;padding:0;margin:0;}
.anchor-nav li + li{margin-top:4px;}
.anchor-nav a{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 12px;
  border-radius:var(--radius-sm);
  color:var(--text-2);
  font-size:.94rem;
  border:1px solid transparent;
  transition:background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
}
.anchor-nav a i{color:var(--primary);font-size:.85rem;width:16px;text-align:center;}
.anchor-nav a:hover{
  color:#fff;
  background:rgba(47,211,255,.1);
  border-color:rgba(47,211,255,.32);
  transform:translateX(3px);
}
.anchor-tip{
  margin-top:18px;
  padding-top:16px;
  border-top:1px dashed var(--line);
  font-size:.85rem;
  color:var(--text-2);
}

/* ---------- Cards ---------- */
.card-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
}
.info-card{
  display:flex;
  flex-direction:column;
  border-radius:var(--radius-xl);
  overflow:hidden;
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  transition:transform .25s ease, border-color .25s ease, box-shadow .25s ease;
  height:100%;
}
.info-card:hover{
  transform:translateY(-5px);
  border-color:rgba(47,211,255,.55);
  box-shadow:0 16px 40px rgba(0,0,0,.45), var(--glow-soft);
}
.info-card .thumb{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:linear-gradient(135deg,#0d1730,#13224a);
}
.info-card .thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.info-card:hover .thumb img{transform:scale(1.06);}
.info-card .thumb::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(6,10,20,0) 35%, rgba(6,10,20,.78) 100%);
}
.badge-float{
  position:absolute;
  top:12px;left:12px;
  z-index:2;
  padding:4px 11px;
  font-size:.75rem;
  font-weight:700;
  border-radius:999px;
  color:#04121F;
  background:linear-gradient(135deg,#5BE2FF,var(--primary-strong));
  box-shadow:0 4px 14px rgba(0,163,255,.4);
}
.info-card .body{
  padding:20px 22px 22px;
  display:flex;
  flex-direction:column;
  flex:1;
}
.info-card h3{
  font-size:1.12rem;
  margin-bottom:10px;
}
.info-card p{
  color:var(--text-2);
  font-size:.94rem;
  margin-bottom:16px;
  flex:1;
}
.card-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;}
.tag{
  font-size:.76rem;
  padding:4px 10px;
  border-radius:999px;
  color:var(--primary);
  background:rgba(47,211,255,.1);
  border:1px solid rgba(47,211,255,.28);
}
.tag.tag-purple{color:#C7B4FF;background:rgba(139,92,246,.14);border-color:rgba(139,92,246,.36);}
.tag.tag-amber{color:var(--accent);background:rgba(255,176,32,.12);border-color:rgba(255,176,32,.34);}
.card-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:.92rem;
  font-weight:700;
  color:var(--primary);
  align-self:flex-start;
}
.card-link i{transition:transform .2s ease;}
.card-link:hover i{transform:translateX(4px);}

/* ---------- Steps ---------- */
.steps-list{display:grid;gap:18px;}
.step-row{
  display:grid;
  grid-template-columns:64px 1fr;
  gap:20px;
  align-items:start;
  padding:22px 24px;
  border-radius:var(--radius-xl);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.step-row:hover{border-color:rgba(47,211,255,.5);transform:translateX(4px);box-shadow:var(--glow-soft);}
.step-index{
  width:52px;height:52px;
  border-radius:15px;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;
  font-size:1.05rem;
  color:#04121F;
  background:linear-gradient(135deg,#5BE2FF,var(--secondary));
  box-shadow:var(--glow);
}
.step-row h3{font-size:1.08rem;margin-bottom:8px;}
.step-row p{color:var(--text-2);font-size:.94rem;margin-bottom:8px;}
.step-row ul{color:var(--text-2);font-size:.92rem;margin:0;}
.step-row li{margin-bottom:4px;}

/* ---------- Feature / split ---------- */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:center;
}
.split-media{
  border-radius:var(--radius-xl);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  position:relative;
}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.split-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(160deg, rgba(47,211,255,.14), rgba(139,92,246,.16));
  mix-blend-mode:screen;
  pointer-events:none;
}
.split-body h2{font-size:clamp(1.35rem,2.2vw,1.75rem);margin-bottom:14px;}
.split-body p{color:var(--text-2);}
.check-list{list-style:none;padding:0;margin:0 0 22px;}
.check-list li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  padding:8px 0;
  color:var(--text-2);
  font-size:.95rem;
}
.check-list i{color:var(--success);margin-top:5px;font-size:.9rem;}

/* ---------- Stats band ---------- */
.metric-band{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
}
.metric{
  padding:26px 24px;
  border-radius:var(--radius-xl);
  background:linear-gradient(150deg, rgba(16,26,48,.9), rgba(10,16,34,.65));
  border:1px solid var(--line);
  transition:border-color .25s ease, transform .25s ease;
}
.metric:hover{border-color:rgba(139,92,246,.5);transform:translateY(-4px);}
.metric .metric-num{
  font-size:2rem;
  font-weight:800;
  color:var(--primary);
  display:block;
  line-height:1.2;
}
.metric .metric-title{font-weight:700;margin:6px 0 8px;font-size:1.02rem;}
.metric p{color:var(--text-2);font-size:.9rem;margin:0;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;}
.accordion-item{
  background:var(--glass);
  border:1px solid var(--line) !important;
  border-radius:var(--radius-lg) !important;
  margin-bottom:14px;
  overflow:hidden;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.accordion-button{
  background:transparent;
  color:var(--text-1);
  font-weight:700;
  font-size:1rem;
  padding:18px 22px;
  box-shadow:none !important;
  border-radius:var(--radius-lg) !important;
}
.accordion-button:not(.collapsed){
  background:rgba(47,211,255,.08);
  color:#fff;
}
.accordion-button::after{
  filter:invert(75%) sepia(60%) saturate(1400%) hue-rotate(160deg);
}
.accordion-button:focus{box-shadow:var(--glow-soft) !important;outline:none;}
.accordion-body{
  color:var(--text-2);
  font-size:.95rem;
  padding:4px 22px 20px;
  line-height:1.85;
}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  padding:56px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:linear-gradient(100deg, rgba(47,211,255,.12) 0%, rgba(139,92,246,.14) 55%, rgba(255,176,32,.08) 100%);
  overflow:hidden;
}
.cta-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.cta-inner h2{font-size:clamp(1.3rem,2.2vw,1.7rem);margin-bottom:8px;}
.cta-inner p{color:var(--text-2);margin-bottom:0;max-width:640px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- Footer ---------- */
.site-footer{
  background:rgba(6,10,20,.9);
  border-top:1px solid var(--line);
  padding:56px 0 26px;
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:34px;
  padding-bottom:34px;
  border-bottom:1px solid var(--line);
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  font-size:1.05rem;
  margin-bottom:14px;
  color:var(--text-1);
}
.footer-desc{color:var(--text-2);font-size:.9rem;margin:0;max-width:340px;}
.footer-title{
  font-size:.95rem;
  font-weight:700;
  color:var(--text-1);
  margin-bottom:16px;
  letter-spacing:.4px;
}
.footer-links{list-style:none;padding:0;margin:0;}
.footer-links li{margin-bottom:10px;}
.footer-links a{color:var(--text-2);font-size:.9rem;}
.footer-links a:hover{color:var(--primary);padding-left:3px;}
.footer-note{color:var(--text-2);font-size:.88rem;margin:0;line-height:1.9;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  align-items:center;
  padding-top:20px;
  color:#7D8CAE;
  font-size:.84rem;
}

/* ---------- Responsive ---------- */
@media (max-width:1199.98px){
  .main-nav .nav-link{padding:9px 11px;font-size:.9rem;}
}
@media (max-width:1024px){
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));}
  .split{grid-template-columns:1fr;gap:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:991.98px){
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .main-nav{
    position:fixed;
    inset:0 0 0 auto;
    width:min(340px,86vw);
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:96px 22px 32px;
    background:rgba(5,9,18,.97);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    border-left:1px solid var(--line);
    transform:translateX(100%);
    transition:transform .3s ease;
    overflow-y:auto;
    z-index:1200;
  }
  .main-nav.open{transform:translateX(0);}
  .main-nav .nav-link{
    padding:15px 16px;
    font-size:1.02rem;
    border-radius:var(--radius-md);
    border:1px solid transparent;
  }
  .main-nav .nav-link::after{display:none;}
  .main-nav .nav-link.active{
    border-color:rgba(47,211,255,.4);
    background:rgba(47,211,255,.12);
  }
  .main-nav .nav-link.active::before{top:50%;transform:translateY(-50%);right:14px;}
  .anchor-nav{position:static;margin-bottom:26px;}
  .accordion-button{font-size:.96rem;}
}
@media (max-width:767.98px){
  .section{padding:54px 0;}
  .page-hero{padding:48px 0 42px;}
  .card-grid{grid-template-columns:1fr;}
  .metric-band{grid-template-columns:1fr;}
  .step-row{grid-template-columns:1fr;gap:14px;padding:20px;}
  .step-index{width:46px;height:46px;border-radius:13px;font-size:.98rem;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .hero-stats{grid-template-columns:1fr;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn-glow,
  .hero-actions .btn-ghost{width:100%;}
  .brand-text{font-size:.95rem;}
  .page-hero h1{font-size:1.6rem;}
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn-glow,
  .cta-actions .btn-ghost{width:100%;}
}

/* roulang page: article */
:root{
  --bg-deep:#060A14;
  --bg-base:#0A1022;
  --bg-elev:#101A33;
  --primary:#2FD3FF;
  --primary-strong:#00A3FF;
  --secondary:#8B5CF6;
  --accent:#FFB020;
  --success:#35E0A1;
  --text-1:#EAF2FF;
  --text-2:#A9B8D6;
  --line:rgba(80,160,255,.18);
  --glow:0 0 24px rgba(47,211,255,.35);
  --shadow-card:0 10px 30px rgba(0,0,0,.35);
  --radius-lg:22px;
  --radius-md:16px;
  --radius-sm:12px;
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  min-height:100vh;
  background:var(--bg-deep);
  color:var(--text-1);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-2;
  background:
    radial-gradient(900px 620px at 10% -12%, rgba(47,211,255,.18), transparent 62%),
    radial-gradient(820px 600px at 92% -4%, rgba(139,92,246,.18), transparent 64%),
    radial-gradient(700px 520px at 50% 110%, rgba(0,163,255,.12), transparent 66%),
    linear-gradient(180deg,#060A14 0%,#0A1022 42%,#060A14 100%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  opacity:.5;
  background-image:
    linear-gradient(rgba(80,160,255,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(80,160,255,.055) 1px, transparent 1px);
  background-size:52px 52px;
  -webkit-mask-image:radial-gradient(circle at 50% 12%, #000 28%, transparent 80%);
  mask-image:radial-gradient(circle at 50% 12%, #000 28%, transparent 80%);
}
a{color:var(--primary);text-decoration:none}
a:hover{color:#8CE7FF}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.45;color:var(--text-1)}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px}

.container,.container-lg,.container-xl{
  max-width:1240px;
  padding-left:20px;
  padding-right:20px;
  margin-left:auto;
  margin-right:auto;
}

/* ============ header ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(6,10,20,.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  height:68px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text-1);
  font-weight:800;
  letter-spacing:.02em;
  flex-shrink:0;
}
.brand:hover{color:#fff}
.brand-mark{
  width:34px;height:34px;
  display:grid;place-items:center;
  border-radius:11px;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  color:#04101d;
  font-size:15px;
  box-shadow:0 0 18px rgba(47,211,255,.45);
}
.brand-text{font-size:16.5px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 14px;
  border-radius:10px;
  color:var(--text-2);
  font-size:15px;
  font-weight:500;
  white-space:nowrap;
  transition:color .22s ease, background .22s ease;
}
.nav-link:hover{color:#fff;background:rgba(47,211,255,.08)}
.nav-link.active{color:#fff}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:1px;
  height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  box-shadow:0 0 12px rgba(47,211,255,.85);
}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(16,26,48,.7);
  color:var(--text-1);
  font-size:17px;
  cursor:pointer;
  transition:.22s ease;
}
.nav-toggle:hover{border-color:rgba(47,211,255,.55);color:#fff}

.btn-glow{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  min-height:46px;
  border-radius:14px;
  border:1px solid rgba(47,211,255,.5);
  background:linear-gradient(135deg,var(--primary),var(--primary-strong));
  color:#04121D;
  font-weight:700;
  font-size:15px;
  letter-spacing:.01em;
  box-shadow:0 0 20px rgba(47,211,255,.28);
  transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.btn-glow:hover,.btn-glow:focus-visible{
  color:#04121D;
  transform:translateY(-2px);
  box-shadow:0 0 30px rgba(47,211,255,.6);
  border-color:rgba(47,211,255,.9);
}
.btn-glow:active{transform:translateY(0)}
.btn-glow.btn-sm{padding:9px 16px;min-height:40px;font-size:14px}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  min-height:46px;
  border-radius:14px;
  border:1px solid rgba(47,211,255,.4);
  background:rgba(47,211,255,.05);
  color:var(--primary);
  font-weight:600;
  font-size:15px;
  transition:.22s ease;
}
.btn-ghost:hover,.btn-ghost:focus-visible{
  color:#fff;
  background:rgba(47,211,255,.14);
  border-color:rgba(47,211,255,.85);
  box-shadow:0 0 22px rgba(47,211,255,.28);
}
.btn-block{display:flex;width:100%;margin-top:10px}

.read-progress{
  position:fixed;
  top:68px;left:0;
  height:2px;
  width:0;
  z-index:1035;
  background:linear-gradient(90deg,var(--primary),var(--secondary),var(--accent));
  box-shadow:0 0 12px rgba(47,211,255,.8);
  transition:width .12s linear;
}

/* ============ breadcrumb ============ */
.crumb-bar{padding:24px 0 0}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  color:var(--text-2);
}
.crumb a{color:var(--text-2);transition:color .2s ease}
.crumb a:hover{color:var(--primary)}
.crumb .sep{opacity:.45}
.crumb .current{
  color:var(--text-1);
  max-width:min(520px,60vw);
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}

/* ============ article hero ============ */
.article-hero{padding:26px 0 34px}
.article-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 15px;
  border-radius:999px;
  font-size:13.5px;
  font-weight:600;
  color:var(--primary);
  background:rgba(47,211,255,.1);
  border:1px solid rgba(47,211,255,.3);
}
.article-title{
  font-size:clamp(1.72rem,3.4vw,2.7rem);
  font-weight:800;
  line-height:1.34;
  letter-spacing:.01em;
  margin:18px 0 20px;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  color:var(--text-2);
  font-size:14px;
}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:7px}
.article-meta .meta-item i{color:var(--primary);font-size:13px}
.article-lead{
  margin-top:24px;
  padding:18px 24px;
  border-radius:var(--radius-md);
  background:rgba(16,26,48,.6);
  border:1px solid var(--line);
  border-left:3px solid var(--primary);
  box-shadow:inset 0 0 30px rgba(47,211,255,.05);
  color:var(--text-2);
  font-size:15.5px;
  line-height:1.95;
}
.article-lead p{margin:0}

/* ============ layout ============ */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:34px;
  align-items:start;
  padding-bottom:12px;
}
.reader{
  background:rgba(16,26,48,.55);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:36px 42px 34px;
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.article-content{
  max-width:840px;
  font-size:17.5px;
  line-height:1.92;
  color:#DCE7FA;
  word-break:break-word;
}
.article-content p{margin:0 0 1.2em}
.article-content h2{
  position:relative;
  font-size:1.5rem;
  font-weight:700;
  line-height:1.5;
  margin:2em 0 .85em;
  padding-left:18px;
  scroll-margin-top:100px;
}
.article-content h2::before{
  content:"";
  position:absolute;
  left:0;top:.22em;bottom:.22em;
  width:4px;
  border-radius:3px;
  background:linear-gradient(180deg,var(--primary),var(--secondary));
  box-shadow:0 0 14px rgba(47,211,255,.7);
}
.article-content h3{
  font-size:1.16rem;
  font-weight:700;
  margin:1.7em 0 .6em;
  color:#fff;
  scroll-margin-top:100px;
}
.article-content h4{font-size:1.02rem;margin:1.4em 0 .5em;color:#fff}
.article-content a{
  color:var(--primary);
  border-bottom:1px dashed rgba(47,211,255,.55);
  transition:.2s ease;
}
.article-content a:hover{color:#8CE7FF;border-bottom-color:#8CE7FF}
.article-content strong{color:#fff;font-weight:700}
.article-content blockquote{
  margin:1.5em 0;
  padding:16px 24px;
  border-left:3px solid var(--primary);
  border-radius:0 14px 14px 0;
  background:rgba(47,211,255,.07);
  box-shadow:inset 0 0 26px rgba(47,211,255,.07);
  color:var(--text-2);
}
.article-content blockquote p:last-child{margin-bottom:0}
.article-content ul,.article-content ol{padding-left:1.35em;margin:0 0 1.25em}
.article-content ul{list-style:disc}
.article-content ol{list-style:decimal}
.article-content li{margin:.42em 0}
.article-content ul li::marker{color:var(--primary)}
.article-content ol li::marker{color:var(--secondary);font-weight:700}
.article-content img{
  border-radius:var(--radius-md);
  border:1px solid var(--line);
  margin:1.3em 0;
  box-shadow:var(--shadow-card);
}
.article-content figure{margin:1.5em 0}
.article-content figcaption{
  text-align:center;
  font-size:13.5px;
  color:var(--text-2);
  margin-top:10px;
}
.article-content table{
  width:100%;
  border-collapse:collapse;
  margin:1.5em 0;
  font-size:15.5px;
  border-radius:12px;
  overflow:hidden;
}
.article-content th,.article-content td{
  padding:12px 15px;
  border:1px solid var(--line);
  text-align:left;
}
.article-content th{background:rgba(47,211,255,.1);color:#fff;font-weight:700}
.article-content tbody tr:nth-child(even){background:rgba(255,255,255,.028)}
.article-content code{
  padding:2px 7px;
  border-radius:6px;
  background:rgba(139,92,246,.16);
  color:#D8C9FF;
  font-size:.92em;
}
.article-content pre{
  padding:18px 20px;
  border-radius:14px;
  background:rgba(4,8,16,.85);
  border:1px solid var(--line);
  overflow:auto;
  font-size:14.5px;
}
.article-content hr{border:0;border-top:1px dashed var(--line);margin:2em 0}

.tag-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  margin-top:32px;
  padding-top:24px;
  border-top:1px dashed var(--line);
}
.tag-row .tag-label{
  font-size:14px;
  color:var(--text-2);
  margin-right:2px;
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 15px;
  border-radius:999px;
  font-size:13.5px;
  color:var(--text-2);
  background:rgba(139,92,246,.12);
  border:1px solid rgba(139,92,246,.32);
  transition:.22s ease;
}
.tag:hover{
  color:#fff;
  border-color:rgba(47,211,255,.7);
  background:rgba(47,211,255,.14);
  box-shadow:0 0 16px rgba(47,211,255,.25);
}

.empty-state{
  text-align:center;
  padding:56px 20px;
}
.empty-state i{
  font-size:42px;
  color:var(--secondary);
  margin-bottom:18px;
  display:block;
}
.empty-state h2{font-size:1.4rem;margin-bottom:12px}
.empty-state p{color:var(--text-2);max-width:460px;margin:0 auto 24px}

/* ============ sidebar ============ */
.article-side{position:sticky;top:94px}
.side-card{
  background:rgba(16,26,48,.62);
  border:1px solid var(--line);
  border-radius:20px;
  padding:22px;
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  margin-bottom:20px;
}
.side-card:last-child{margin-bottom:0}
.side-title{
  display:flex;
  align-items:center;
  gap:9px;
  font-size:15px;
  font-weight:700;
  padding-bottom:12px;
  border-bottom:1px solid var(--line);
}
.side-title i{color:var(--primary);font-size:14px}
.side-card p{color:var(--text-2);font-size:14px;line-height:1.85;margin:14px 0 4px}
.toc-list{
  margin-top:14px;
  max-height:48vh;
  overflow-y:auto;
  scrollbar-width:thin;
}
.toc-list::-webkit-scrollbar{width:5px}
.toc-list::-webkit-scrollbar-thumb{background:rgba(47,211,255,.35);border-radius:3px}
.toc-list a{
  display:block;
  padding:7px 11px;
  border-radius:9px;
  border-left:2px solid transparent;
  color:var(--text-2);
  font-size:13.8px;
  line-height:1.6;
  transition:.2s ease;
}
.toc-list a:hover{color:#fff;background:rgba(47,211,255,.08)}
.toc-list a.active{
  color:var(--primary);
  border-left-color:var(--primary);
  background:rgba(47,211,255,.1);
}
.toc-list a.toc-sub{padding-left:22px;font-size:13.2px;opacity:.86}

/* ============ related ============ */
.related-section{padding:58px 0 6px}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px;
  margin-bottom:24px;
}
.section-head .eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--primary);
  margin-bottom:8px;
}
.section-head h2{font-size:1.6rem;font-weight:800}
.section-head .head-note{color:var(--text-2);font-size:14.5px}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.post-card{
  display:flex;
  flex-direction:column;
  height:100%;
  border-radius:20px;
  overflow:hidden;
  background:rgba(16,26,48,.62);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:transform .28s ease, border-color .28s ease, box-shadow .28s ease;
}
.post-card:hover{
  transform:translateY(-6px);
  border-color:rgba(47,211,255,.5);
  box-shadow:0 18px 40px rgba(0,0,0,.45), 0 0 24px rgba(47,211,255,.18);
}
.post-thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.post-card:hover .post-thumb img{transform:scale(1.06)}
.post-thumb::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(6,10,20,0) 35%,rgba(6,10,20,.75) 100%);
}
.post-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.post-tag{
  align-self:flex-start;
  padding:4px 12px;
  border-radius:999px;
  font-size:12.5px;
  color:var(--accent);
  background:rgba(255,176,32,.12);
  border:1px solid rgba(255,176,32,.3);
  margin-bottom:12px;
}
.post-body h3{font-size:1.06rem;font-weight:700;line-height:1.55;margin-bottom:10px}
.post-body h3 a{color:var(--text-1)}
.post-body h3 a:hover{color:var(--primary)}
.post-body p{color:var(--text-2);font-size:14.2px;line-height:1.8;margin-bottom:16px}
.post-foot{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  font-size:13px;
  color:var(--text-2);
}
.post-foot .more{color:var(--primary);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.post-card:hover .post-foot .more{gap:10px}

/* ============ CTA band ============ */
.cta-band{
  margin:66px 0 76px;
  padding:40px 44px;
  border-radius:24px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  background:
    radial-gradient(600px 240px at 8% 0%, rgba(47,211,255,.2), transparent 70%),
    radial-gradient(520px 240px at 96% 100%, rgba(139,92,246,.22), transparent 72%),
    rgba(16,26,48,.72);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.cta-band h2{font-size:1.5rem;margin-bottom:10px}
.cta-band p{color:var(--text-2);font-size:14.8px;margin:0;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ footer ============ */
.site-footer{
  border-top:1px solid var(--line);
  background:rgba(6,10,20,.78);
  padding:56px 0 26px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:34px;
  padding-bottom:34px;
  border-bottom:1px solid var(--line);
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:16.5px;
  font-weight:800;
  margin-bottom:14px;
}
.footer-desc{color:var(--text-2);font-size:14px;line-height:1.85;margin:0;max-width:340px}
.footer-title{font-size:15px;font-weight:700;margin-bottom:16px}
.footer-links li{margin-bottom:10px}
.footer-links a{color:var(--text-2);font-size:14px;transition:.2s ease}
.footer-links a:hover{color:var(--primary);padding-left:4px}
.footer-note{color:var(--text-2);font-size:13.8px;line-height:2;margin:0}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:22px;
  color:var(--text-2);
  font-size:13.2px;
}

/* ============ responsive ============ */
@media (max-width:1199.98px){
  .article-layout{grid-template-columns:minmax(0,1fr) 280px;gap:26px}
}
@media (max-width:1023.98px){
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .article-side{position:static}
  .toc-list{max-height:none}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:991.98px){
  .main-nav{
    position:fixed;
    top:68px;left:0;right:0;bottom:0;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:22px 20px 40px;
    background:rgba(4,8,16,.98);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    transform:translateX(102%);
    transition:transform .3s ease;
    overflow-y:auto;
    border-top:1px solid var(--line);
  }
  .main-nav.open{transform:translateX(0)}
  .nav-link{padding:15px 16px;font-size:16px;border-radius:12px}
  .nav-link.active{background:rgba(47,211,255,.1)}
  .nav-link.active::after{left:16px;right:auto;width:26px;bottom:9px}
  .nav-toggle{display:inline-flex}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767.98px){
  .reader{padding:28px 22px}
  .article-content{font-size:16.5px}
  .article-hero{padding:20px 0 26px}
  .article-lead{padding:16px 18px;font-size:15px}
  .cta-band{padding:30px 24px;margin:52px 0 60px}
  .cta-band h2{font-size:1.3rem}
  .related-section{padding:46px 0 6px}
  .section-head h2{font-size:1.4rem}
  .crumb .current{max-width:100%}
}
@media (max-width:575.98px){
  .container,.container-lg,.container-xl{padding-left:16px;padding-right:16px}
  .brand-text{font-size:15px}
  .header-cta{display:none}
  .reader{padding:24px 17px;border-radius:18px}
  .article-title{font-size:1.6rem}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn-glow,.cta-actions .btn-ghost{width:100%}
  .article-meta{gap:8px 16px;font-size:13.4px}
}

/* roulang page: category2 */
:root{
  --bg-deep:#060A14;
  --bg-base:#0A1022;
  --bg-elev:#101A33;
  --primary:#2FD3FF;
  --primary-strong:#00A3FF;
  --secondary:#8B5CF6;
  --accent:#FFB020;
  --success:#35E0A1;
  --text-1:#EAF2FF;
  --text-2:#A9B8D6;
  --text-3:#7E8DAE;
  --line:rgba(80,160,255,.18);
  --line-strong:rgba(47,211,255,.42);
  --glass:rgba(16,26,48,.72);
  --glow:0 0 24px rgba(47,211,255,.35);
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --r-lg:22px;
  --r-md:16px;
  --r-sm:12px;
  --sp-1:8px; --sp-2:16px; --sp-3:24px; --sp-4:32px; --sp-5:48px; --sp-6:72px; --sp-7:96px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:
    radial-gradient(1100px 620px at 12% -8%, rgba(47,211,255,.16), transparent 62%),
    radial-gradient(900px 560px at 92% 6%, rgba(139,92,246,.18), transparent 60%),
    radial-gradient(1200px 800px at 50% 108%, rgba(0,163,255,.12), transparent 66%),
    linear-gradient(180deg,#060A14 0%,#0A1022 46%,#070C1A 100%);
  background-attachment:fixed;
  color:var(--text-1);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(80,160,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(80,160,255,.05) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 20%, #000 0%, transparent 78%);
}
img{max-width:100%;display:block;border-radius:var(--r-md);}
a{color:var(--primary);text-decoration:none;transition:color .22s ease;}
a:hover{color:#7FE4FF;}
h1,h2,h3,h4{font-weight:800;letter-spacing:.2px;color:var(--text-1);margin:0;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;position:relative;z-index:1;}
.section{padding:var(--sp-7) 0;position:relative;z-index:1;}
.section-sm{padding:var(--sp-5) 0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:2px;text-transform:uppercase;
  color:var(--primary);font-weight:700;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:linear-gradient(90deg,var(--primary),transparent);border-radius:2px;}
.section-title{font-size:clamp(1.5rem,2.4vw,2rem);margin-bottom:12px;}
.section-sub{color:var(--text-2);max-width:720px;font-size:15.5px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(6,10,20,.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:68px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-1);font-weight:800;font-size:17px;letter-spacing:.3px;}
.brand:hover{color:var(--text-1);}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;display:grid;place-items:center;border-radius:11px;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  color:#04101F;font-size:15px;box-shadow:var(--glow);
}
.brand-text{white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;display:inline-block;padding:10px 14px;border-radius:10px;
  color:var(--text-2);font-size:15px;font-weight:600;transition:color .22s ease,background .22s ease;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  transform:scaleX(0);transform-origin:left;transition:transform .26s ease;
}
.nav-link:hover{color:var(--text-1);background:rgba(47,211,255,.07);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--text-1);}
.nav-link.active::after{transform:scaleX(1);}
.nav-link.active::before{
  content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:-3px;
  width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:var(--glow);
}
.header-cta{
  display:inline-flex;align-items:center;gap:8px;white-space:nowrap;
  background:linear-gradient(135deg,var(--primary),var(--primary-strong));
  color:#04101F;font-weight:800;font-size:14px;padding:9px 18px;
  border-radius:12px;border:1px solid transparent;
  box-shadow:0 0 20px rgba(47,211,255,.3);
  transition:transform .2s ease,box-shadow .2s ease,color .2s ease;
}
.header-cta:hover{transform:translateY(-2px);color:#04101F;box-shadow:0 0 30px rgba(47,211,255,.55);}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  background:rgba(47,211,255,.1);border:1px solid var(--line);
  color:var(--text-1);font-size:18px;
}
.nav-toggle:hover{border-color:var(--line-strong);color:var(--primary);}

/* ---------- buttons ---------- */
.btn-glow{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;border-radius:14px;border:1px solid transparent;
  background:linear-gradient(135deg,var(--primary),var(--primary-strong));
  color:#04101F;font-weight:800;font-size:15.5px;
  box-shadow:0 0 22px rgba(47,211,255,.28);
  transition:transform .2s ease,box-shadow .2s ease;
}
.btn-glow:hover{transform:translateY(-2px);color:#04101F;box-shadow:0 0 34px rgba(47,211,255,.6);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;border-radius:14px;
  background:rgba(47,211,255,.05);border:1px solid var(--line-strong);
  color:var(--primary);font-weight:700;font-size:15.5px;
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-ghost:hover{background:rgba(47,211,255,.14);color:#8AEBFF;transform:translateY(-2px);box-shadow:0 0 22px rgba(47,211,255,.25);}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:12px;}
.btn-glow:focus-visible,.btn-ghost:focus-visible,.nav-link:focus-visible,.nav-toggle:focus-visible,a:focus-visible{
  outline:2px solid var(--primary);outline-offset:3px;box-shadow:0 0 18px rgba(47,211,255,.55);
}

/* ---------- hero ---------- */
.hero-kv{
  position:relative;overflow:hidden;
  padding:96px 0 76px;
  border-bottom:1px solid var(--line);
}
.hero-kv::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(100deg,rgba(6,10,20,.94) 0%,rgba(8,14,30,.82) 46%,rgba(10,16,34,.6) 100%),
                   url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  opacity:.92;z-index:0;
}
.hero-kv::after{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:
    linear-gradient(rgba(80,160,255,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(80,160,255,.07) 1px,transparent 1px);
  background-size:52px 52px;
  mask-image:linear-gradient(90deg,#000 0%,transparent 72%);
}
.hero-inner{position:relative;z-index:2;max-width:860px;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13.5px;color:var(--text-3);margin-bottom:18px;}
.crumb a{color:var(--text-2);}
.crumb a:hover{color:var(--primary);}
.crumb .sep{opacity:.5;}
.crumb .now{color:var(--primary);font-weight:700;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;padding:7px 15px;border-radius:999px;
  background:rgba(47,211,255,.1);border:1px solid var(--line-strong);
  color:var(--primary);font-size:13px;font-weight:700;margin-bottom:20px;
}
.hero-tag .dot{width:7px;height:7px;border-radius:50%;background:var(--success);box-shadow:0 0 12px var(--success);}
.hero-kv h1{
  font-size:clamp(1.9rem,3.8vw,3.1rem);line-height:1.28;margin-bottom:18px;
}
.hero-kv h1 em{
  font-style:normal;
  background:linear-gradient(120deg,var(--primary),var(--secondary));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{color:var(--text-2);font-size:17px;max-width:720px;margin-bottom:30px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:38px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:12px;}
.hero-meta .chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 15px;border-radius:12px;font-size:13.5px;color:var(--text-2);
  background:rgba(16,26,48,.66);border:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.hero-meta .chip i{color:var(--primary);}

/* ---------- stat strip ---------- */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  margin-top:-38px;position:relative;z-index:5;
}
.stat-card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 20px;backdrop-filter:blur(14px);
  box-shadow:var(--shadow);transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.stat-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 14px 34px rgba(0,0,0,.42),0 0 22px rgba(47,211,255,.16);}
.stat-num{font-size:28px;font-weight:800;letter-spacing:.5px;color:var(--primary);line-height:1.2;}
.stat-num span{font-size:15px;color:var(--text-2);font-weight:700;margin-left:4px;}
.stat-label{font-size:14.5px;font-weight:700;margin-top:6px;}
.stat-desc{font-size:13.5px;color:var(--text-3);margin-top:4px;}

/* ---------- anchor nav ---------- */
.anchor-bar{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:34px;
}
.anchor-bar a{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;border-radius:999px;font-size:14px;font-weight:600;
  background:rgba(16,26,48,.6);border:1px solid var(--line);color:var(--text-2);
  transition:all .2s ease;
}
.anchor-bar a:hover{border-color:var(--line-strong);color:var(--primary);background:rgba(47,211,255,.1);}

/* ---------- timeline ---------- */
.timeline{position:relative;margin-top:52px;padding-left:0;}
.timeline::before{
  content:"";position:absolute;left:50%;top:0;bottom:0;width:2px;transform:translateX(-50%);
  background:linear-gradient(180deg,transparent,rgba(47,211,255,.5) 8%,rgba(139,92,246,.45) 92%,transparent);
}
.tl-item{position:relative;width:50%;padding:0 46px 46px 0;}
.tl-item:nth-child(even){margin-left:50%;padding:0 0 46px 46px;}
.tl-node{
  position:absolute;top:26px;right:-11px;width:22px;height:22px;border-radius:50%;
  background:var(--bg-base);border:2px solid var(--primary);
  box-shadow:0 0 18px rgba(47,211,255,.7);
}
.tl-item:nth-child(even) .tl-node{right:auto;left:-11px;border-color:var(--secondary);box-shadow:0 0 18px rgba(139,92,246,.7);}
.tl-node::after{content:"";position:absolute;inset:5px;border-radius:50%;background:var(--primary);}
.tl-item:nth-child(even) .tl-node::after{background:var(--secondary);}
.tl-card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;backdrop-filter:blur(14px);box-shadow:var(--shadow);
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.tl-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 16px 38px rgba(0,0,0,.45),0 0 26px rgba(47,211,255,.16);}
.tl-step{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:800;
  letter-spacing:1.5px;color:var(--accent);margin-bottom:10px;
}
.tl-card h3{font-size:1.15rem;margin-bottom:10px;}
.tl-card p{color:var(--text-2);font-size:14.8px;}
.tl-media{margin-top:16px;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);}
.tl-media img{width:100%;height:180px;object-fit:cover;border-radius:0;}
.tl-points{margin-top:14px;display:flex;flex-direction:column;gap:8px;}
.tl-points li{display:flex;gap:9px;font-size:14px;color:var(--text-2);}
.tl-points li i{color:var(--primary);margin-top:5px;font-size:11px;}

/* ---------- module cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:44px;}
.module-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-lg);
  backdrop-filter:blur(14px);box-shadow:var(--shadow);
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.module-card:hover{transform:translateY(-6px);border-color:var(--line-strong);box-shadow:0 18px 40px rgba(0,0,0,.46),0 0 26px rgba(47,211,255,.18);}
.module-thumb{position:relative;height:170px;overflow:hidden;}
.module-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .5s ease;}
.module-card:hover .module-thumb img{transform:scale(1.06);}
.module-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,10,20,.1),rgba(6,10,20,.82));}
.badge-line{position:absolute;top:14px;left:14px;z-index:2;display:flex;gap:8px;flex-wrap:wrap;}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
  font-size:12px;font-weight:700;letter-spacing:.4px;
}
.badge-primary{background:rgba(47,211,255,.16);color:#8AEBFF;border:1px solid rgba(47,211,255,.4);}
.badge-purple{background:rgba(139,92,246,.18);color:#C4B0FF;border:1px solid rgba(139,92,246,.42);}
.badge-amber{background:rgba(255,176,32,.16);color:#FFD07A;border:1px solid rgba(255,176,32,.4);}
.module-body{padding:22px;display:flex;flex-direction:column;flex:1;}
.module-body h3{font-size:1.1rem;margin-bottom:9px;}
.module-body p{color:var(--text-2);font-size:14.5px;flex:1;}
.module-foot{display:flex;align-items:center;justify-content:space-between;margin-top:18px;padding-top:16px;border-top:1px solid var(--line);}
.module-foot .meta{font-size:13px;color:var(--text-3);}
.module-foot .meta i{color:var(--primary);margin-right:5px;}
.link-more{font-size:14px;font-weight:700;color:var(--primary);display:inline-flex;align-items:center;gap:6px;}
.link-more:hover{gap:10px;color:#8AEBFF;}

/* ---------- scene ---------- */
.scene-row{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;margin-top:34px;}
.scene-row.reverse .scene-text{order:2;}
.scene-row.reverse .scene-media{order:1;}
.scene-text h3{font-size:1.35rem;margin-bottom:14px;}
.scene-text p{color:var(--text-2);font-size:15.5px;margin-bottom:16px;}
.scene-list{display:flex;flex-direction:column;gap:12px;margin-top:6px;}
.scene-list li{
  display:flex;gap:12px;align-items:flex-start;padding:13px 16px;border-radius:var(--r-sm);
  background:rgba(16,26,48,.55);border:1px solid var(--line);font-size:14.5px;color:var(--text-2);
}
.scene-list li i{color:var(--primary);margin-top:4px;}
.scene-media{position:relative;}
.scene-media img{width:100%;height:340px;object-fit:cover;border:1px solid var(--line);box-shadow:var(--shadow);}
.scene-media::after{
  content:"";position:absolute;inset:0;border-radius:var(--r-md);
  box-shadow:inset 0 0 60px rgba(6,10,20,.6);pointer-events:none;
}

/* ---------- tip bar ---------- */
.tip-bar{
  margin-top:44px;display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between;
  padding:22px 26px;border-radius:var(--r-lg);
  background:linear-gradient(120deg,rgba(47,211,255,.12),rgba(139,92,246,.12));
  border:1px solid var(--line-strong);backdrop-filter:blur(14px);
}
.tip-bar .tip-text{display:flex;gap:14px;align-items:flex-start;max-width:760px;}
.tip-bar .tip-text i{font-size:20px;color:var(--accent);margin-top:3px;}
.tip-bar strong{display:block;font-size:15.5px;margin-bottom:4px;}
.tip-bar span{color:var(--text-2);font-size:14px;}

/* ---------- faq ---------- */
.faq-wrap{margin-top:40px;max-width:900px;}
.faq-item{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:14px;overflow:hidden;backdrop-filter:blur(14px);
  transition:border-color .22s ease,box-shadow .22s ease;
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-item .accordion-button{
  background:transparent;color:var(--text-1);font-weight:700;font-size:15.5px;
  padding:20px 22px;box-shadow:none;border:0;
}
.faq-item .accordion-button:not(.collapsed){color:var(--primary);background:rgba(47,211,255,.06);}
.faq-item .accordion-button::after{
  background-image:none;content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;
  font-size:13px;color:var(--primary);width:auto;height:auto;transform:none;
  transition:transform .25s ease;
}
.faq-item .accordion-button:not(.collapsed)::after{content:"\f068";transform:none;}
.faq-item .accordion-button:focus{box-shadow:none;}
.faq-item .accordion-body{
  padding:0 22px 22px;color:var(--text-2);font-size:14.8px;border-top:1px solid var(--line);
  padding-top:18px;
}

/* ---------- cta band ---------- */
.cta-band{
  padding:56px 0;position:relative;z-index:1;
}
.cta-inner{
  display:flex;flex-wrap:wrap;gap:26px;align-items:center;justify-content:space-between;
  padding:38px 40px;border-radius:26px;
  background:linear-gradient(120deg,rgba(16,26,48,.9),rgba(24,20,58,.86));
  border:1px solid var(--line-strong);
  box-shadow:0 20px 50px rgba(0,0,0,.45),0 0 40px rgba(47,211,255,.12);
  position:relative;overflow:hidden;
}
.cta-inner::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(80,160,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(80,160,255,.06) 1px,transparent 1px);
  background-size:44px 44px;opacity:.7;
}
.cta-text{position:relative;z-index:2;max-width:660px;}
.cta-text h2{font-size:clamp(1.35rem,2.2vw,1.8rem);margin-bottom:10px;}
.cta-text p{color:var(--text-2);font-size:15px;}
.cta-actions{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- footer ---------- */
.site-footer{
  margin-top:20px;padding:64px 0 28px;
  background:linear-gradient(180deg,rgba(6,10,20,.4),rgba(4,8,18,.96));
  border-top:1px solid var(--line);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:16.5px;margin-bottom:14px;}
.footer-desc{color:var(--text-3);font-size:14px;max-width:320px;}
.footer-title{font-size:14.5px;font-weight:800;margin-bottom:16px;color:var(--text-1);}
.footer-links li{margin-bottom:10px;}
.footer-links a{color:var(--text-3);font-size:14px;}
.footer-links a:hover{color:var(--primary);}
.footer-note{color:var(--text-3);font-size:14px;line-height:2;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  margin-top:40px;padding-top:22px;border-top:1px solid var(--line);
  color:var(--text-3);font-size:13.5px;
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .section{padding:64px 0;}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .scene-row{grid-template-columns:1fr;gap:28px;}
  .scene-row.reverse .scene-text{order:1;}
  .scene-row.reverse .scene-media{order:2;}
  .scene-media img{height:280px;}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:30px;}
}
@media (max-width:992px){
  .main-nav{
    position:fixed;inset:68px 0 0 0;
    flex-direction:column;align-items:stretch;gap:6px;
    padding:24px 22px;background:rgba(5,9,18,.98);
    backdrop-filter:blur(18px);
    border-top:1px solid var(--line);
    transform:translateX(100%);transition:transform .3s ease;
    overflow-y:auto;
  }
  .main-nav.open{transform:translateX(0);}
  .main-nav .nav-link{font-size:17px;padding:15px 16px;border-radius:12px;}
  .main-nav .nav-link::after{left:16px;right:auto;width:0;bottom:10px;}
  .main-nav .nav-link.active{background:rgba(47,211,255,.1);}
  .main-nav .nav-link.active::after{width:26px;transform:none;}
  .main-nav .nav-link.active::before{display:none;}
  .nav-toggle{display:grid;place-items:center;}
  .hero-kv{padding:72px 0 60px;}
}
@media (max-width:768px){
  body{font-size:15.5px;}
  .section{padding:52px 0;}
  .brand-text{font-size:15px;}
  .header-cta{padding:8px 14px;font-size:13px;}
  .card-grid{grid-template-columns:1fr;}
  .stat-strip{grid-template-columns:1fr 1fr;gap:12px;}
  .stat-num{font-size:24px;}
  .timeline::before{left:11px;}
  .tl-item,.tl-item:nth-child(even){width:100%;margin-left:0;padding:0 0 34px 40px;}
  .tl-node,.tl-item:nth-child(even) .tl-node{left:0;right:auto;top:24px;}
  .tl-media img{height:160px;}
  .cta-inner{padding:28px 22px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .stat-strip{grid-template-columns:1fr;}
  .hero-actions .btn-glow,.hero-actions .btn-ghost{width:100%;min-height:46px;}
  .anchor-bar a{font-size:13px;padding:8px 13px;}
  .scene-media img{height:220px;}
  .module-thumb{height:150px;}
}

/* roulang page: category3 */
:root{
  --bg-deep:#060A14;
  --bg-base:#0A1022;
  --bg-elev:#101A33;
  --glass:rgba(16,26,48,.72);
  --primary:#2FD3FF;
  --primary-strong:#00A3FF;
  --secondary:#8B5CF6;
  --accent:#FFB020;
  --success:#35E0A1;
  --text-1:#EAF2FF;
  --text-2:#A9B8D6;
  --text-3:#7C8CAE;
  --line:rgba(80,160,255,.18);
  --line-strong:rgba(80,160,255,.38);
  --glow:0 0 24px rgba(47,211,255,.35);
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --radius-card:20px;
  --radius-sm:12px;
  --radius-pill:999px;
  --font-cn:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  color:var(--text-1);
  background:var(--bg-deep);
  background-image:
    radial-gradient(900px 520px at 12% -6%, rgba(47,211,255,.16), transparent 62%),
    radial-gradient(760px 460px at 88% 4%, rgba(139,92,246,.16), transparent 60%),
    radial-gradient(1100px 700px at 50% 108%, rgba(0,163,255,.12), transparent 66%),
    linear-gradient(180deg,#060A14 0%,#0A1022 42%,#070C18 100%);
  background-attachment:fixed;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(80,160,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(80,160,255,.05) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 22%, #000 12%, transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 22%, #000 12%, transparent 78%);
}
main,header,footer{position:relative;z-index:1;}

a{color:var(--primary);text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:#7ee6ff;}
img{max-width:100%;height:auto;display:block;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
h1,h2,h3,h4{font-weight:800;letter-spacing:.2px;color:var(--text-1);margin:0;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}

::selection{background:rgba(47,211,255,.3);color:#fff;}

.container{max-width:1280px;padding-left:20px;padding-right:20px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(6,10,20,.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:68px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text-1);
  font-weight:800;
  font-size:1.05rem;
  white-space:nowrap;
}
.brand:hover{color:#fff;}
.brand-mark{
  width:36px;height:36px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:12px;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  color:#04121f;
  font-size:15px;
  box-shadow:var(--glow);
  flex:none;
}
.main-nav{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;
  padding:10px 14px;
  border-radius:var(--radius-sm);
  color:var(--text-2);
  font-size:.95rem;
  font-weight:500;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:4px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .25s ease;
}
.nav-link:hover{color:var(--text-1);background:rgba(47,211,255,.06);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:#fff;}
.nav-link.active::after{transform:scaleX(1);box-shadow:var(--glow);}
.nav-link.active::before{
  content:"";
  position:absolute;
  left:50%;top:6px;
  width:5px;height:5px;
  margin-left:-2.5px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:var(--glow);
}
.header-cta{white-space:nowrap;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--line-strong);
  background:rgba(47,211,255,.08);
  color:var(--primary);
  font-size:18px;
}

/* ---------- buttons ---------- */
.btn-glow{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:12px 24px;
  border-radius:14px;
  border:1px solid transparent;
  background:linear-gradient(135deg,var(--primary) 0%,var(--primary-strong) 100%);
  color:#04121F;
  font-weight:700;
  font-size:.95rem;
  box-shadow:0 8px 24px rgba(47,211,255,.28);
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
}
.btn-glow:hover{
  color:#04121F;
  transform:translateY(-2px);
  box-shadow:0 12px 32px rgba(47,211,255,.45),var(--glow);
  filter:brightness(1.05);
}
.btn-glow.btn-sm{min-height:42px;padding:9px 18px;font-size:.9rem;border-radius:12px;}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:12px 24px;
  border-radius:14px;
  border:1px solid var(--line-strong);
  background:rgba(47,211,255,.05);
  color:var(--text-1);
  font-weight:600;
  font-size:.95rem;
  transition:background .2s ease,transform .2s ease,border-color .2s ease,color .2s ease;
}
.btn-ghost:hover{
  background:rgba(47,211,255,.16);
  border-color:var(--primary);
  color:#fff;
  transform:translateY(-2px);
}
.btn-glow:focus-visible,.btn-ghost:focus-visible,.nav-link:focus-visible,.nav-toggle:focus-visible,a:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:3px;
  box-shadow:var(--glow);
}

/* ---------- shared blocks ---------- */
.section{padding:84px 0;}
.section-tight{padding:56px 0;}
.section-head{max-width:760px;margin-bottom:44px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;
  margin-bottom:16px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);
  background:rgba(47,211,255,.08);
  color:var(--primary);
  font-size:.82rem;
  letter-spacing:1px;
  font-weight:600;
}
.eyebrow i{font-size:.72rem;}
h2.section-title{font-size:clamp(1.5rem,2.6vw,1.85rem);line-height:1.35;}
.section-title .accent{
  background:linear-gradient(100deg,var(--primary),var(--secondary));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.section-sub{color:var(--text-2);margin-top:14px;font-size:1rem;}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;
  border-radius:var(--radius-pill);
  font-size:.78rem;
  font-weight:600;
  border:1px solid var(--line-strong);
  color:var(--primary);
  background:rgba(47,211,255,.08);
  white-space:nowrap;
}
.tag.tag-purple{color:#c4b1ff;border-color:rgba(139,92,246,.45);background:rgba(139,92,246,.14);}
.tag.tag-amber{color:#ffd28a;border-color:rgba(255,176,32,.42);background:rgba(255,176,32,.12);}
.tag.tag-green{color:#9bf3d2;border-color:rgba(53,224,161,.4);background:rgba(53,224,161,.12);}

/* ---------- hero ---------- */
.cat-hero{
  position:relative;
  padding:72px 0 66px;
  background-image:
    linear-gradient(180deg, rgba(6,10,20,.86) 0%, rgba(8,13,26,.92) 60%, rgba(6,10,20,.98) 100%),
    url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.cat-hero::after{
  content:"";
  position:absolute;inset:0;
  background:
    radial-gradient(560px 320px at 82% 18%, rgba(139,92,246,.24), transparent 66%),
    radial-gradient(520px 300px at 10% 86%, rgba(47,211,255,.2), transparent 68%);
  pointer-events:none;
}
.cat-hero .container{position:relative;z-index:2;}
.breadcrumb-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:.85rem;color:var(--text-3);margin-bottom:22px;
}
.breadcrumb-bar a{color:var(--text-2);}
.breadcrumb-bar a:hover{color:var(--primary);}
.breadcrumb-bar .sep{color:var(--text-3);opacity:.7;}
.breadcrumb-bar .current{color:var(--primary);font-weight:600;}
.cat-hero h1{
  font-size:clamp(1.85rem,4vw,3.1rem);
  line-height:1.24;
  max-width:900px;
}
.cat-hero h1 .hl{
  background:linear-gradient(100deg,var(--primary),var(--secondary));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{
  max-width:700px;
  margin-top:20px;
  color:var(--text-2);
  font-size:1.02rem;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-stats{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
  margin-top:48px;
}
.stat-card{
  padding:18px 20px;
  border-radius:var(--radius-card);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:border-color .25s ease,transform .25s ease;
}
.stat-card:hover{border-color:var(--line-strong);transform:translateY(-3px);}
.stat-num{
  font-size:1.5rem;font-weight:800;
  color:var(--primary);
  letter-spacing:.5px;
  line-height:1.2;
}
.stat-label{color:var(--text-2);font-size:.85rem;margin-top:4px;}

/* ---------- filter tags ---------- */
.filter-row{
  display:flex;flex-wrap:wrap;gap:10px;
  padding:16px;
  border-radius:var(--radius-card);
  background:rgba(16,26,48,.6);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  margin-bottom:34px;
}
.filter-btn{
  padding:9px 18px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  background:rgba(8,14,28,.7);
  color:var(--text-2);
  font-size:.88rem;
  font-weight:600;
  transition:all .22s ease;
}
.filter-btn:hover{color:#fff;border-color:var(--line-strong);transform:translateY(-1px);}
.filter-btn.is-active{
  color:#04121F;
  background:linear-gradient(135deg,var(--primary),var(--primary-strong));
  border-color:transparent;
  box-shadow:0 8px 22px rgba(47,211,255,.3);
}

/* ---------- magazine grid ---------- */
.mag-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:22px;
}
.mag-card{
  position:relative;
  display:flex;
  flex-direction:column;
  border-radius:var(--radius-card);
  overflow:hidden;
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
  transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.mag-card:hover{
  transform:translateY(-5px);
  border-color:var(--line-strong);
  box-shadow:0 18px 40px rgba(0,0,0,.45),0 0 22px rgba(47,211,255,.18);
}
.mag-card.is-hidden{display:none;}
.mag-media{
  position:relative;
  overflow:hidden;
  background:linear-gradient(135deg,rgba(47,211,255,.18),rgba(139,92,246,.18));
}
.mag-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.mag-card:hover .mag-media img{transform:scale(1.05);}
.mag-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,20,0) 32%,rgba(6,10,20,.82) 100%);
}
.mag-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.mag-meta{
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  font-size:.8rem;color:var(--text-3);
}
.mag-meta i{font-size:.72rem;margin-right:4px;color:var(--primary);}
.mag-title{font-size:1.08rem;line-height:1.5;}
.mag-desc{color:var(--text-2);font-size:.92rem;}
.mag-link{
  margin-top:auto;
  display:inline-flex;align-items:center;gap:8px;
  color:var(--primary);
  font-weight:700;
  font-size:.9rem;
}
.mag-link i{transition:transform .22s ease;}
.mag-link:hover i{transform:translateX(4px);}

/* featured card */
.mag-card.featured{grid-column:span 2;grid-row:span 1;flex-direction:row;}
.mag-card.featured .mag-media{flex:1 1 52%;min-height:320px;}
.mag-card.featured .mag-body{flex:1 1 48%;padding:32px 30px;justify-content:center;gap:16px;}
.mag-card.featured .mag-title{font-size:clamp(1.25rem,2.2vw,1.6rem);}
.mag-card.featured .mag-desc{font-size:.96rem;}
.featured-flag{
  position:absolute;top:16px;left:16px;z-index:3;
  padding:6px 14px;
  border-radius:var(--radius-pill);
  background:linear-gradient(135deg,var(--accent),#ff8a3d);
  color:#2a1500;
  font-size:.76rem;
  font-weight:800;
  letter-spacing:.5px;
  box-shadow:0 6px 18px rgba(255,176,32,.35);
}
.mag-card.tall .mag-media{height:220px;}
.mag-card.wide{grid-column:span 2;flex-direction:row;}
.mag-card.wide .mag-media{flex:0 0 44%;min-height:230px;}
.mag-card.wide .mag-body{flex:1;}

/* ---------- rhythm timeline ---------- */
.rhythm{
  padding:36px;
  border-radius:26px;
  background:linear-gradient(140deg,rgba(16,26,48,.9),rgba(10,16,34,.92));
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.rhythm-track{
  position:relative;
  display:flex;
  justify-content:space-between;
  gap:12px;
  margin-top:32px;
  padding-top:26px;
}
.rhythm-track::before{
  content:"";
  position:absolute;top:8px;left:6%;right:6%;
  height:2px;
  background:linear-gradient(90deg,rgba(47,211,255,.7),rgba(139,92,246,.6),rgba(47,211,255,.15));
  border-radius:2px;
}
.rhythm-node{
  position:relative;
  flex:1;
  text-align:center;
  padding-top:22px;
}
.rhythm-node::before{
  content:"";
  position:absolute;top:-22px;left:50%;
  width:14px;height:14px;
  margin-left:-7px;
  border-radius:50%;
  background:var(--bg-elev);
  border:2px solid var(--primary);
  box-shadow:var(--glow);
}
.rhythm-node.is-done::before{background:var(--primary);}
.rhythm-node.is-pending::before{border-color:var(--line-strong);box-shadow:none;}
.rhythm-node strong{display:block;font-size:.95rem;}
.rhythm-node span{display:block;color:var(--text-3);font-size:.82rem;margin-top:4px;}

/* ---------- notice bar ---------- */
.notice-bar{
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  padding:18px 24px;
  border-radius:var(--radius-card);
  border:1px solid rgba(255,176,32,.32);
  background:rgba(255,176,32,.08);
  color:#ffd28a;
  font-size:.92rem;
}
.notice-bar i{color:var(--accent);font-size:1.1rem;}

/* ---------- subscribe ---------- */
.subscribe{
  display:grid;
  grid-template-columns:1.1fr 1fr;
  gap:36px;
  align-items:center;
  padding:40px;
  border-radius:26px;
  background:linear-gradient(135deg,rgba(27,43,79,.85),rgba(12,19,38,.92));
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow);
}
.subscribe h3{font-size:1.4rem;margin-bottom:12px;}
.subscribe p{color:var(--text-2);}
.sub-form{display:flex;gap:12px;flex-wrap:wrap;}
.sub-form input{
  flex:1 1 220px;
  min-height:48px;
  padding:12px 16px;
  border-radius:var(--radius-sm);
  background:rgba(6,10,20,.72);
  border:1px solid var(--line);
  color:var(--text-1);
  font-size:.95rem;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.sub-form input::placeholder{color:var(--text-3);}
.sub-form input:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(47,211,255,.18);
}
.form-hint{color:var(--text-3);font-size:.82rem;margin-top:12px;}

/* ---------- faq ---------- */
.faq-wrap{
  border-radius:26px;
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  overflow:hidden;
}
.accordion-item{
  background:transparent;
  border:0;
  border-bottom:1px solid var(--line);
}
.accordion-item:last-child{border-bottom:0;}
.accordion-button{
  background:transparent;
  color:var(--text-1);
  font-weight:700;
  font-size:1rem;
  padding:22px 24px;
  box-shadow:none !important;
  gap:14px;
}
.accordion-button::after{
  background-image:none;
  content:"\f067";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  font-size:.8rem;
  width:auto;height:auto;
  color:var(--primary);
  transition:transform .25s ease;
}
.accordion-button:not(.collapsed){color:var(--primary);background:rgba(47,211,255,.06);}
.accordion-button:not(.collapsed)::after{transform:rotate(45deg);}
.accordion-body{
  color:var(--text-2);
  font-size:.95rem;
  padding:0 24px 24px;
  line-height:1.8;
}

/* ---------- cta ---------- */
.cta-band{
  position:relative;
  padding:52px 44px;
  border-radius:28px;
  text-align:center;
  background:linear-gradient(135deg,rgba(47,211,255,.14),rgba(139,92,246,.18));
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow);
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;inset:-40% -10% auto auto;
  width:420px;height:420px;
  background:radial-gradient(circle,rgba(47,211,255,.28),transparent 66%);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(1.4rem,2.8vw,2rem);margin-bottom:14px;}
.cta-band p{color:var(--text-2);max-width:640px;margin:0 auto 26px;}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{
  margin-top:20px;
  padding:64px 0 28px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(8,13,26,.6),rgba(6,10,20,.95));
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:36px;
}
.footer-brand{
  display:flex;align-items:center;gap:10px;
  font-weight:800;font-size:1.05rem;color:var(--text-1);
  margin-bottom:16px;
}
.footer-desc{color:var(--text-2);font-size:.92rem;max-width:340px;}
.footer-title{
  font-size:.95rem;
  color:var(--text-1);
  margin-bottom:18px;
  font-weight:700;
}
.footer-links li{margin-bottom:11px;}
.footer-links a{color:var(--text-2);font-size:.92rem;}
.footer-links a:hover{color:var(--primary);}
.footer-note{color:var(--text-3);font-size:.88rem;line-height:2;}
.footer-bottom{
  margin-top:44px;
  padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  color:var(--text-3);font-size:.84rem;
}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .mag-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .mag-card.featured{grid-column:span 2;flex-direction:row;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:991.98px){
  .section{padding:64px 0;}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));}
  .subscribe{grid-template-columns:1fr;padding:32px;gap:24px;}
  .mag-card.featured{flex-direction:column;}
  .mag-card.featured .mag-media{min-height:240px;flex:none;}
  .mag-card.wide{grid-column:span 2;flex-direction:column;}
  .mag-card.wide .mag-media{flex:none;min-height:210px;}

  .main-nav{
    position:fixed;
    inset:68px 0 0 0;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:26px 20px 60px;
    background:rgba(6,10,20,.98);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    transform:translateY(-12px);
    opacity:0;
    visibility:hidden;
    transition:opacity .25s ease,transform .25s ease,visibility .25s;
    overflow-y:auto;
  }
  .main-nav.is-open{opacity:1;visibility:visible;transform:translateY(0);}
  .nav-link{
    font-size:1.05rem;
    padding:16px 18px;
    border:1px solid var(--line);
    background:rgba(16,26,48,.55);
    border-radius:14px;
  }
  .nav-link::after{display:none;}
  .nav-link.active{border-color:var(--line-strong);background:rgba(47,211,255,.12);}
  .nav-link.active::before{left:auto;right:18px;top:50%;margin-top:-2.5px;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
}
@media (max-width:767.98px){
  body{font-size:15px;}
  .cat-hero{padding:52px 0 48px;}
  .hero-stats{grid-template-columns:1fr 1fr;gap:12px;}
  .stat-card{padding:15px 16px;}
  .stat-num{font-size:1.25rem;}
  .mag-grid{grid-template-columns:1fr;gap:18px;}
  .mag-card.featured,.mag-card.wide{grid-column:span 1;}
  .mag-card.featured .mag-body{padding:24px 20px;}
  .mag-body{padding:20px 18px 22px;}
  .rhythm{padding:26px 20px;}
  .rhythm-track{flex-direction:column;gap:26px;padding-top:8px;}
  .rhythm-track::before{top:0;bottom:0;left:7px;right:auto;width:2px;height:auto;}
  .rhythm-node{text-align:left;padding:0 0 0 34px;}
  .rhythm-node::before{top:4px;left:0;margin-left:0;}
  .cta-band{padding:38px 22px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .filter-row{padding:14px;gap:8px;}
  .filter-btn{padding:8px 14px;font-size:.84rem;}
}
@media (max-width:520px){
  .container{padding-left:16px;padding-right:16px;}
  .brand-text{font-size:.95rem;}
  .hero-actions .btn-glow,.hero-actions .btn-ghost{width:100%;}
  .cta-actions .btn-glow,.cta-actions .btn-ghost{width:100%;}
  .hero-stats{grid-template-columns:1fr;}
  .accordion-button{padding:18px 18px;font-size:.94rem;}
  .accordion-body{padding:0 18px 20px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}