/* roulang page: index */
:root{
  --bl-bg:#0A111E;
  --bl-bg-deep:#070D16;
  --bl-surface:rgba(255,255,255,0.06);
  --bl-surface-strong:rgba(255,255,255,0.10);
  --bl-primary:#00D4FF;
  --bl-accent:#7EC8E3;
  --bl-warning:#FFB454;
  --bl-text:#EAF2F8;
  --bl-text-secondary:#94A9BC;
  --bl-border:rgba(255,255,255,0.12);
  --bl-radius-lg:16px;
  --bl-radius-md:10px;
  --bl-radius-sm:8px;
  --bl-glow:0 0 20px rgba(0,212,255,0.35);
  --bl-glow-strong:0 0 32px rgba(0,212,255,0.55);
  --bl-shadow-card:0 8px 32px rgba(0,0,0,0.35);
  --bl-space:96px;
  --bl-space-md:56px;
  --bl-space-sm:32px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bl-bg);
  color:var(--bl-text);
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.75;font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul,ol{list-style:none}
button,input{font-family:inherit;font-size:inherit;border:none;background:none;color:inherit}
button{cursor:pointer}
input:focus{outline:none}
::selection{background:rgba(0,212,255,0.3);color:#fff}

.bl-container{max-width:1200px;margin:0 auto;padding:0 24px}
.bl-section-head{margin-bottom:40px}
.bl-section-head h2{
  font-size:clamp(1.5rem,3vw,2.1rem);
  font-weight:650;line-height:1.3;
  letter-spacing:-0.01em;
  margin-bottom:8px;
  position:relative;
}
.bl-section-head h2::after{
  content:"";display:block;width:48px;height:3px;
  background:var(--bl-primary);
  border-radius:2px;margin-top:12px;
  box-shadow:var(--bl-glow);
}
.bl-section-head p{
  color:var(--bl-text-secondary);
  font-size:1rem;
  margin-top:8px;
}
.bl-section{padding:var(--bl-space) 0}

.bl-btn{
  display:inline-flex;align-items:center;justify-content:center;
  gap:8px;min-height:44px;padding:10px 28px;
  font-size:0.9375rem;font-weight:600;
  border-radius:var(--bl-radius-sm);
  transition:all 0.25s ease;
  letter-spacing:0.02em;
  white-space:nowrap;
  border:1px solid transparent;
}
.bl-btn-primary{
  background:var(--bl-primary);
  color:#0A111E;
  box-shadow:0 0 12px rgba(0,212,255,0.3);
}
.bl-btn-primary:hover{
  background:#33ddff;
  box-shadow:var(--bl-glow-strong);
  transform:translateY(-2px);
}
.bl-btn-outline{
  background:transparent;
  border-color:var(--bl-primary);
  color:var(--bl-primary);
}
.bl-btn-outline:hover{
  background:rgba(0,212,255,0.10);
  box-shadow:0 0 14px rgba(0,212,255,0.25);
  transform:translateY(-2px);
}
.bl-btn-ghost{
  background:transparent;
  color:var(--bl-primary);
  padding:10px 16px;
}
.bl-btn-ghost:hover{
  color:#fff;
  text-decoration:underline;
  text-underline-offset:4px;
}
.bl-btn:focus{outline:2px solid var(--bl-primary);outline-offset:2px}

.bl-tag{
  display:inline-block;padding:3px 14px;
  font-size:0.75rem;font-weight:500;
  color:var(--bl-accent);
  background:rgba(126,200,227,0.12);
  border:1px solid rgba(126,200,227,0.25);
  border-radius:999px;
  letter-spacing:0.03em;
}

/* Header */
.bl-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(10,17,30,0.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,0.06);
  transition:background 0.3s ease;
}
.bl-header .bl-container{
  display:flex;align-items:center;justify-content:space-between;
  height:72px;
}
.bl-nav{flex:1;display:flex;align-items:center;justify-content:space-between;gap:24px}
.bl-nav-left,.bl-nav-right{flex:1;display:flex;align-items:center}
.bl-nav-right{justify-content:flex-end}
.bl-nav-list{display:flex;align-items:center;gap:6px;margin:0}
.bl-nav-link{
  display:inline-flex;align-items:center;
  padding:8px 16px;
  font-size:0.9375rem;font-weight:500;
  color:var(--bl-text-secondary);
  border-radius:999px;
  transition:all 0.25s ease;
  position:relative;
}
.bl-nav-link:hover{color:var(--bl-text);background:rgba(255,255,255,0.05)}
.bl-nav-link.active{
  color:var(--bl-primary);
  background:rgba(0,212,255,0.08);
}
.bl-nav-link.active::after{
  content:"";position:absolute;bottom:0;left:16px;right:16px;
  height:2px;background:var(--bl-primary);
  border-radius:2px;box-shadow:var(--bl-glow);
}
.bl-logo{
  font-size:1.25rem;font-weight:700;
  color:var(--bl-text);
  display:flex;align-items:center;gap:8px;
  letter-spacing:0.02em;
  padding:6px 10px;
  transition:color 0.2s ease;
}
.bl-logo:hover{color:var(--bl-primary)}
.bl-logo-icon{
  width:36px;height:36px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(0,212,255,0.12);
  border:1px solid rgba(0,212,255,0.35);
  border-radius:8px;
  font-size:1.1rem;
  color:var(--bl-primary);
  box-shadow:0 0 12px rgba(0,212,255,0.2);
}
.bl-burger{
  display:none;width:44px;height:44px;
  flex-direction:column;justify-content:center;align-items:center;
  gap:5px;border-radius:8px;
  background:rgba(255,255,255,0.05);
  border:1px solid var(--bl-border);
}
.bl-burger span{
  display:block;width:20px;height:2px;
  background:var(--bl-text);
  border-radius:2px;
  transition:all 0.3s ease;
}
.bl-burger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.bl-burger.active span:nth-child(2){opacity:0}
.bl-burger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.bl-mobile-menu{
  position:fixed;top:0;left:0;right:0;bottom:0;z-index:999;
  background:rgba(10,17,30,0.95);
  backdrop-filter:blur(24px);
  -webkit-backdrop-filter:blur(24px);
  display:flex;flex-direction:column;justify-content:center;align-items:center;
  gap:32px;
  opacity:0;visibility:hidden;
  transition:all 0.35s ease;
}
.bl-mobile-menu.active{opacity:1;visibility:visible}
.bl-mobile-menu a{
  font-size:1.15rem;font-weight:500;
  color:var(--bl-text);
  padding:10px 24px;
  border-radius:999px;
  transition:all 0.2s ease;
}
.bl-mobile-menu a:hover{
  color:var(--bl-primary);
  background:rgba(0,212,255,0.08);
}
.bl-mobile-menu a.active{
  color:var(--bl-primary);
  background:rgba(0,212,255,0.10);
}
.mobile-menu-logo{
  font-size:1.4rem;font-weight:700;color:var(--bl-text);
  margin-bottom:10px;
}
.bl-mobile-close{
  position:absolute;top:18px;right:18px;
  width:44px;height:44px;
  border-radius:8px;
  background:rgba(255,255,255,0.06);
  color:var(--bl-text);
  font-size:1.2rem;
  display:flex;align-items:center;justify-content:center;
  transition:all 0.2s ease;
}
.bl-mobile-close:hover{color:var(--bl-primary)}

/* Hero */
.bl-hero{
  padding:140px 0 64px;
  position:relative;
  overflow:hidden;
}
.bl-hero::before{
  content:"";position:absolute;top:-120px;right:-80px;
  width:520px;height:520px;
  background:radial-gradient(circle,rgba(0,212,255,0.10),transparent 70%);
  pointer-events:none;
}
.bl-hero-cover{
  position:relative;border-radius:var(--bl-radius-lg);
  overflow:hidden;
  box-shadow:0 20px 60px rgba(0,0,0,0.5);
  aspect-ratio:16/9;
}
.bl-hero-cover img{
  width:100%;height:100%;object-fit:cover;
}
.bl-hero-cover::after{
  content:"";position:absolute;inset:0;
  background:rgba(0,212,255,0.08);
  mix-blend-mode:screen;
  pointer-events:none;
}
.bl-hero-info-bar{
  position:absolute;left:16px;right:16px;bottom:16px;
  background:rgba(10,17,30,0.7);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--bl-border);
  border-radius:12px;
  padding:14px 18px;
  display:flex;gap:18px;flex-wrap:wrap;
  font-size:0.8125rem;color:var(--bl-accent);
}
.bl-hero-info-bar i{margin-right:6px;color:var(--bl-primary)}
.bl-live-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 16px;
  background:rgba(0,212,255,0.10);
  border:1px solid rgba(0,212,255,0.4);
  color:var(--bl-primary);
  border-radius:999px;
  font-size:0.8125rem;font-weight:600;
  margin-bottom:16px;
}
.bl-live-badge .dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--bl-primary);
  box-shadow:0 0 8px var(--bl-primary);
  animation:pulse 2s infinite;
}
@keyframes pulse{
  0%,100%{opacity:1}
  50%{opacity:0.5}
}
.bl-live-badge.live{
  background:rgba(255,180,84,0.12);
  border-color:rgba(255,180,84,0.5);
  color:var(--bl-warning);
}
.bl-live-badge.ended{background:rgba(255,255,255,0.06);border-color:var(--bl-border);color:var(--bl-text-secondary)}
.bl-hero h1{
  font-size:clamp(2rem,4.5vw,3.25rem);
  font-weight:700;
  line-height:1.2;
  letter-spacing:-0.02em;
  margin-bottom:12px;
}
.bl-hero-subtitle{
  color:var(--bl-text-secondary);
  font-size:1rem;line-height:1.7;
  margin-bottom:24px;
}
/* Countdown */
.bl-countdown{
  display:flex;align-items:center;gap:16px;
  margin-bottom:24px;
}
.bl-countdown-label{
  font-size:0.875rem;color:var(--bl-accent);
  white-space:nowrap;
}
.bl-countdown-items{
  display:flex;align-items:center;gap:4px;
  background:var(--bl-surface);
  border:1px solid var(--bl-border);
  border-radius:var(--bl-radius-md);
  padding:8px 14px;
  backdrop-filter:blur(10px);
}
.bl-countdown-item{
  min-width:52px;text-align:center;
  padding:4px 6px;
  border-radius:6px;
  background:rgba(0,0,0,0.25);
  position:relative;
}
.bl-countdown-num{
  font-family:"DIN Alternate","Roboto Mono",monospace;
  font-size:clamp(1.8rem,4vw,2.6rem);
  font-weight:700;
  color:var(--bl-text-2,#EAF2F8);
  line-height:1.2;
  text-shadow:0 0 16px rgba(0,212,255,0.4);
}
.bl-countdown-sep{
  color:var(--bl-primary);
  font-size:1.5rem;
  font-weight:700;
  animation:blink 1.5s infinite;
  padding-bottom:6px;
}
@keyframes blink{
  0%,100%{opacity:1}
  50%{opacity:0.3}
}
/* Highlight list */
.bl-highlight-list{margin:0 0 24px;display:flex;flex-direction:column;gap:10px}
.bl-highlight-list li{
  display:flex;align-items:center;gap:12px;
  font-size:0.9375rem;
  color:var(--bl-text);
  padding-bottom:10px;
  border-bottom:1px solid rgba(255,255,255,0.06);
}
.bl-highlight-badge{
  width:24px;height:24px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--bl-primary);
  border-radius:50%;
  color:var(--bl-primary);
  font-size:0.75rem;font-weight:600;
}
/* Subscribe */
.bl-subscribe-form{
  display:flex;gap:10px;
  margin-bottom:10px;
  flex-wrap:wrap;
}
.bl-subscribe-form input{
  flex:1;min-height:44px;
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.15);
  border-radius:var(--bl-radius-sm);
  padding:0 16px;
  color:var(--bl-text);
  font-size:0.9375rem;
  min-width:220px;
  transition:border-color 0.3s ease,box-shadow 0.3s ease;
}
.bl-subscribe-form input::placeholder{color:var(--bl-text-secondary);opacity:0.7}
.bl-subscribe-form input:focus{
  border-color:var(--bl-primary);
  box-shadow:0 0 0 3px rgba(0,212,255,0.15);
}
.bl-subscribe-note{
  font-size:0.75rem;color:var(--bl-text-secondary);
  margin-bottom:24px;
}
/* Hero actions */
.bl-hero-actions{
  display:flex;gap:12px;flex-wrap:wrap;align-items:center;
}
/* Action bar */
.bl-actions-bar{
  padding:16px 0;
  margin-top:8px;
}
.bl-actions-bar-inner{
  background:var(--bl-surface);
  backdrop-filter:blur(14px);
  border:1px solid var(--bl-border);
  border-radius:var(--bl-radius-lg);
  padding:20px 24px;
  display:flex;justify-content:center;
  gap:16px;flex-wrap:wrap;
}

/* News */
.bl-news{background:rgba(255,255,255,0.02);border-top:1px solid rgba(255,255,255,0.05);border-bottom:1px solid rgba(255,255,255,0.05)}
.bl-news-card{
  margin-bottom:24px;
}
.bl-news-card-inner{
  background:var(--bl-surface);
  border:1px solid var(--bl-border);
  border-radius:var(--bl-radius-lg);
  padding:24px;
  height:100%;
  transition:all 0.25s ease;
}
.bl-news-card-inner:hover{
  border-color:rgba(0,212,255,0.5);
  transform:translateY(-4px);
  box-shadow:var(--bl-shadow-card);
}
.bl-news-meta{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.bl-news-date{font-size:0.8125rem;color:var(--bl-text-secondary)}
.bl-news-card h3{
  font-size:1.1rem;font-weight:600;
  margin-bottom:10px;
  line-height:1.4;
  color:var(--bl-text);
}
.bl-news-card:first-child h3{font-size:1.3rem}
.bl-news-summary{
  color:var(--bl-text-secondary);
  font-size:0.9375rem;
  line-height:1.6;
  margin-bottom:12px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.bl-link-more{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--bl-primary);
  font-size:0.875rem;font-weight:500;
  transition:all 0.2s ease;
}
.bl-link-more:hover{color:#fff;gap:10px}
.bl-empty-state{
  height:120px;
  display:flex;align-items:center;justify-content:center;
  border:1px dashed var(--bl-border);
  border-radius:var(--bl-radius-lg);
  color:var(--bl-text-secondary);
  font-size:0.9375rem;
  background:rgba(255,255,255,0.01);
}

/* Replay */
.bl-replay-scroll{
  display:flex;gap:20px;
  overflow-x:auto;
  padding-bottom:16px;
  scrollbar-width:thin;
  scrollbar-color:rgba(0,212,255,0.3) transparent;
}
.bl-replay-scroll::-webkit-scrollbar{height:4px}
.bl-replay-scroll::-webkit-scrollbar-track{background:rgba(255,255,255,0.04)}
.bl-replay-scroll::-webkit-scrollbar-thumb{background:rgba(0,212,255,0.3);border-radius:4px}
.bl-replay-card{
  flex:0 0 280px;
  border-radius:var(--bl-radius-lg);
  background:var(--bl-surface);
  border:1px solid var(--bl-border);
  overflow:hidden;
  transition:all 0.25s ease;
}
.bl-replay-card:hover{
  border-color:rgba(0,212,255,0.5);
  transform:translateY(-4px);
  box-shadow:var(--bl-shadow-card);
}
.bl-replay-cover{
  position:relative;overflow:hidden;
  aspect-ratio:16/9;
}
.bl-replay-cover img{
  width:100%;height:100%;object-fit:cover;
  transition:transform 0.3s ease;
}
.bl-replay-cover::after{
  content:"";position:absolute;inset:0;
  background:rgba(0,212,255,0.08);
  mix-blend-mode:screen;
}
.bl-replay-card:hover .bl-replay-cover img{transform:scale(1.05)}
.bl-duration{
  position:absolute;top:10px;right:10px;z-index:2;
  background:rgba(0,0,0,0.6);
  color:#fff;
  font-size:0.75rem;
  padding:3px 10px;
  border-radius:999px;
  backdrop-filter:blur(6px);
}
.bl-replay-body{padding:16px}
.bl-replay-body h3{
  font-size:0.9375rem;font-weight:600;
  margin-bottom:8px;
  line-height:1.4;
}
.bl-replay-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--bl-primary);
  font-size:0.8125rem;
  font-weight:500;
  transition:all 0.2s ease;
}
.bl-replay-link:hover{color:#fff;gap:10px}

/* Solution */
.bl-solution{background:rgba(255,255,255,0.02);border-top:1px solid rgba(255,255,255,0.05)}
.bl-solution-main-card{
  background:var(--bl-surface);
  border:1px solid var(--bl-border);
  border-radius:var(--bl-radius-lg);
  overflow:hidden;
  height:100%;
  transition:all 0.25s ease;
}
.bl-solution-main-card:hover{
  border-color:rgba(0,212,255,0.5);
  box-shadow:var(--bl-shadow-card);
}
.bl-solution-main-img{aspect-ratio:16/9;overflow:hidden;position:relative}
.bl-solution-main-img img{width:100%;height:100%;object-fit:cover}
.bl-solution-main-img::after{content:"";position:absolute;inset:0;background:rgba(0,212,255,0.06)}
.bl-solution-main-body{padding:28px}
.bl-solution-main-body .bl-tag{margin-bottom:12px}
.bl-solution-main-body h3{
  font-size:1.4rem;font-weight:650;
  margin-bottom:12px;
}
.bl-solution-main-body p{
  color:var(--bl-text-secondary);
  font-size:0.9375rem;
  margin-bottom:16px;
}
.bl-solution-main-body ul{
  margin-bottom:20px;
  display:grid;gap:8px;
}
.bl-solution-main-body ul li{
  display:flex;align-items:center;gap:8px;
  font-size:0.875rem;
  color:var(--bl-text);
}
.bl-solution-main-body ul li::before{
  content:"\f00c";
  font-family:"Font Awesome 6 Free";font-weight:900;
  color:var(--bl-primary);
  font-size:0.8rem;
}
.bl-solution-side{display:flex;flex-direction:column;gap:24px}
.bl-solution-small-card{
  background:var(--bl-surface);
  border:1px solid var(--bl-border);
  border-radius:var(--bl-radius-lg);
  overflow:hidden;
  flex:1;
  transition:all 0.25s ease;
}
.bl-solution-small-card:hover{
  border-color:rgba(0,212,255,0.5);
  transform:translateY(-4px);
  box-shadow:var(--bl-shadow-card);
}
.bl-solution-small-card img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
}
.bl-solution-small-body{padding:20px}
.bl-solution-small-body h4{
  font-size:1rem;font-weight:600;
  margin-bottom:8px;
}
.bl-solution-small-body p{
  color:var(--bl-text-secondary);
  font-size:0.875rem;
  margin-bottom:12px;
}

/* FAQ */
.bl-faq{max-width:860px;margin:0 auto}
.bl-faq-item{
  background:var(--bl-surface);
  border:1px solid var(--bl-border);
  border-radius:var(--bl-radius-md);
  margin-bottom:14px;
  overflow:hidden;
  transition:all 0.25s ease;
}
.bl-faq-item:hover{border-color:rgba(0,212,255,0.35)}
.bl-faq-item.active{
  border-color:rgba(0,212,255,0.5);
  box-shadow:0 0 20px rgba(0,212,255,0.08);
}
.bl-faq-question{
  width:100%;display:flex;align-items:center;gap:14px;
  padding:20px 22px;
  text-align:left;
  color:var(--bl-text);
  font-size:0.9375rem;font-weight:600;
}
.bl-faq-q{color:var(--bl-primary);font-weight:700;font-size:1.05rem}
.bl-faq-icon{
  margin-left:auto;width:28px;height:28px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:1px solid var(--bl-border);
  color:var(--bl-primary);
  font-size:0.875rem;
  transition:all 0.3s ease;
}
.bl-faq-item.active .bl-faq-icon{
  transform:rotate(45deg);
  background:rgba(0,212,255,0.12);
  border-color:var(--bl-primary);
}
.bl-faq-answer{
  max-height:0;overflow:hidden;
  transition:max-height 0.35s ease;
  font-size:0.9375rem;
  color:var(--bl-text-secondary);
  line-height:1.7;
}
.bl-faq-item.active .bl-faq-answer{
  max-height:300px;
  padding:0 22px 20px 60px;
  border-top:1px solid rgba(255,255,255,0.06);
  padding-top:14px;
}

/* CTA */
.bl-cta{
  position:relative;
  background:linear-gradient(180deg,transparent,rgba(0,212,255,0.04));
  overflow:hidden;
}
.bl-cta::before{
  content:"";position:absolute;bottom:-100px;left:50%;transform:translateX(-50%);
  width:600px;height:300px;
  background:radial-gradient(ellipse,rgba(0,212,255,0.12),transparent 70%);
  pointer-events:none;
}
.bl-cta-inner{
  max-width:780px;margin:0 auto;text-align:center;
  background:rgba(255,255,255,0.04);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid rgba(0,212,255,0.2);
  border-radius:var(--bl-radius-lg);
  padding:56px 48px;
  box-shadow:0 0 40px rgba(0,212,255,0.08);
  position:relative;
}
.bl-cta-inner h2{
  font-size:clamp(1.6rem,3vw,2.2rem);
  font-weight:700;
  margin-bottom:12px;
}
.bl-cta-inner p{
  color:var(--bl-text-secondary);
  font-size:1rem;
  margin-bottom:28px;
}

/* Footer */
.bl-footer{
  background:var(--bl-bg-deep);
  border-top:1px solid rgba(255,255,255,0.06);
  padding:64px 0 0;
}
.bl-footer-grid{
  padding-bottom:40px;
}
.bl-footer-brand .bl-logo{margin-bottom:12px;font-size:1.3rem}
.bl-footer-brand p{
  font-size:0.875rem;color:var(--bl-text-secondary);
  margin-bottom:16px;
}
.bl-footer h4{
  font-size:0.9375rem;font-weight:600;
  color:var(--bl-text);
  margin-bottom:18px;
  position:relative;
  padding-bottom:10px;
}
.bl-footer h4::after{
  content:"";position:absolute;bottom:0;left:0;
  width:24px;height:2px;
  background:var(--bl-primary);
}
.bl-footer-nav-list{display:flex;flex-direction:column;gap:10px}
.bl-footer-nav-list a{
  font-size:0.875rem;color:var(--bl-text-secondary);
  transition:all 0.2s ease;
}
.bl-footer-nav-list a:hover{color:var(--bl-primary);padding-left:4px}
.bl-footer-subscribe form{
  display:flex;gap:8px;
}
.bl-footer-subscribe input{
  flex:1;min-height:40px;
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.12);
  border-radius:var(--bl-radius-sm);
  padding:0 12px;
  font-size:0.8125rem;
  color:var(--bl-text);
}
.bl-footer-subscribe input:focus{
  border-color:var(--bl-primary);
  box-shadow:0 0 0 3px rgba(0,212,255,0.15);
}
.bl-footer-subscribe button{
  min-height:40px;padding:0 18px;
  font-size:0.8125rem;
}
.bl-footer-contact-item{
  display:flex;align-items:center;gap:10px;
  margin-bottom:10px;
  font-size:0.875rem;
  color:var(--bl-text-secondary);
}
.bl-footer-contact-item i{color:var(--bl-primary);width:16px}
.bl-copyright{
  border-top:1px solid rgba(255,255,255,0.06);
  padding:20px 0;
  text-align:center;
  font-size:13px;
  color:var(--bl-text-secondary);
}
.bl-copyright a{color:var(--bl-text-secondary)}
.bl-copyright a:hover{color:var(--bl-primary)}

@media(min-width:1025px){
  .bl-mobile-menu{display:none}
}

@media(max-width:1024px){
  .bl-nav-list .bl-nav-link{padding:8px 12px;font-size:0.875rem}
  .bl-logo{font-size:1.1rem}
  .bl-hero{padding:120px 0 48px}
  .bl-solution-side{gap:20px;margin-top:24px}
}

@media(max-width:640px){
  .bl-container{padding:0 16px}
  .bl-section{padding:var(--bl-space-md) 0}
  .bl-section-head{margin-bottom:28px}
  .bl-section-head h2::after{margin-top:8px}
  .bl-nav-left,.bl-nav-right{display:none}
  .bl-burger{display:flex}
  .bl-header .bl-container{height:64px}
  .bl-hero{padding:96px 0 40px}
  .bl-hero-cover{margin-bottom:24px}
  .bl-hero-info-bar{font-size:0.75rem;gap:10px;padding:10px 14px}
  .bl-countdown{flex-direction:column;align-items:flex-start;gap:8px}
  .bl-countdown-items{width:100%;justify-content:space-between}
  .bl-countdown-item{min-width:44px}
  .bl-countdown-num{font-size:1.6rem}
  .bl-subscribe-form{flex-direction:column}
  .bl-subscribe-form input{min-width:100%}
  .bl-subscribe-form .bl-btn{width:100%}
  .bl-hero-actions{flex-direction:column;align-items:stretch}
  .bl-hero-actions .bl-btn{width:100%;justify-content:center}
  .bl-actions-bar-inner{flex-direction:column;padding:16px}
  .bl-actions-bar .bl-btn{width:100%}
  .bl-faq-question{padding:16px;font-size:0.875rem;gap:10px}
  .bl-faq-item.active .bl-faq-answer{
    padding:12px 16px 16px 44px;
  }
  .bl-cta-inner{padding:36px 20px}
  .bl-footer-grid{gap:32px}
  .bl-copyright{padding:16px 16px}
}

/* roulang page: category1 */
:root {
  --bl-bg: #0A111E;
  --bl-bg-deep: #070D16;
  --bl-surface: rgba(255, 255, 255, 0.06);
  --bl-surface-hover: rgba(255, 255, 255, 0.10);
  --bl-border: rgba(255, 255, 255, 0.12);
  --bl-border-bright: rgba(0, 212, 255, 0.50);
  --bl-primary: #00D4FF;
  --bl-accent: #7EC8E3;
  --bl-warning: #FFB454;
  --bl-text: #EAF2F8;
  --bl-text-secondary: #94A9BC;
  --bl-radius: 16px;
  --bl-radius-sm: 10px;
  --bl-radius-btn: 8px;
  --bl-glow: 0 0 20px rgba(0, 212, 255, 0.35);
  --bl-glow-soft: 0 0 12px rgba(0, 212, 255, 0.18);
  --bl-shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
  --bl-space: 96px;
  --bl-space-sm: 56px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px; line-height: 1.75; color: var(--bl-text);
  background: var(--bl-bg); -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; transition: color .25s ease; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: none; background: none; color: inherit; }
:focus-visible { outline: 2px solid var(--bl-primary); outline-offset: 2px; }
.bl-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; width: 100%; }
.bl-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10, 17, 30, 0.82);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--bl-border);
}
.bl-header .bl-container { position: relative; }
.bl-nav {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 72px; gap: 16px;
}
.bl-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.25rem; font-weight: 700; color: var(--bl-text);
  white-space: nowrap; z-index: 3;
}
.bl-logo-icon {
  display: flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 10px;
  background: rgba(0, 212, 255, 0.12); color: var(--bl-primary);
  border: 1px solid rgba(0, 212, 255, 0.3); box-shadow: var(--bl-glow-soft);
}
.bl-logo:hover { color: var(--bl-primary); }
.bl-nav-left, .bl-nav-right { display: flex; align-items: center; z-index: 2; }
.bl-nav-list { display: flex; gap: 4px; }
.bl-nav-link {
  display: inline-flex; align-items: center;
  padding: 10px 16px; border-radius: 8px; font-size: 0.9375rem;
  color: var(--bl-text-secondary); font-weight: 500;
  min-height: 44px; white-space: nowrap; transition: all .25s ease;
}
.bl-nav-link:hover { color: var(--bl-primary); background: rgba(0, 212, 255, 0.05); }
.bl-nav-link.active {
  color: var(--bl-primary);
  background: rgba(0, 212, 255, 0.06);
  box-shadow: inset 0 -2px 0 var(--bl-primary);
}
.bl-burger {
  display: none; flex-direction: column; justify-content: center;
  gap: 5px; width: 44px; height: 44px; padding: 10px;
  background: var(--bl-surface); border-radius: 8px; border: 1px solid var(--bl-border);
  z-index: 5;
}
.bl-burger span { display: block; height: 2px; width: 22px; background: var(--bl-text); border-radius: 2px; transition: all .3s ease; }
.bl-burger.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.bl-burger.is-active span:nth-child(2) { opacity: 0; }
.bl-burger.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.bl-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 24px; border-radius: var(--bl-radius-btn);
  font-size: 0.9375rem; font-weight: 600; letter-spacing: 0.02em;
  transition: all .25s ease; border: 1px solid transparent;
}
.bl-btn-primary {
  background: var(--bl-primary); color: #0A111E;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.30);
}
.bl-btn-primary:hover { background: #33DFFF; box-shadow: 0 0 28px rgba(0, 212, 255, 0.5); color: #0A111E; transform: translateY(-2px); }
.bl-btn-outline {
  background: transparent; border-color: var(--bl-primary); color: var(--bl-primary);
}
.bl-btn-outline:hover { background: rgba(0, 212, 255, 0.1); box-shadow: var(--bl-glow-soft); transform: translateY(-2px); }
.bl-btn-ghost {
  background: transparent; color: var(--bl-accent); padding: 0 12px;
}
.bl-btn-ghost:hover { color: var(--bl-primary); text-shadow: 0 0 12px rgba(0, 212, 255, 0.4); }
.bl-btn:active { transform: translateY(0) scale(0.98); }

.bl-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 999px;
  background: rgba(0, 212, 255, 0.1); border: 1px solid rgba(0, 212, 255, 0.25);
  color: var(--bl-primary); font-size: 0.8125rem; font-weight: 600;
  letter-spacing: 0.04em;
}
.bl-badge-outline {
  background: transparent; border-color: rgba(126, 200, 227, 0.35);
  color: var(--bl-accent);
}

.bl-cat-hero {
  position: relative; padding: 72px 0 64px;
  background-image: linear-gradient(rgba(10,17,30,0.86), rgba(10,17,30,0.94)), url('/assets/images/backpic/back-1.png');
  background-size: cover; background-position: center;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  overflow: hidden;
}
.bl-cat-hero::before {
  content: ''; position: absolute; top: -120px; right: -80px;
  width: 420px; height: 420px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,212,255,0.12), transparent 70%);
  pointer-events: none;
}
.bl-cat-hero .grid-x { align-items: center; position: relative; z-index: 2; }
.bl-cat-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 700; line-height: 1.2; letter-spacing: -0.02em;
  margin: 20px 0 16px;
}
.bl-cat-hero .bl-hero-sub {
  font-size: 1.125rem; color: var(--bl-text-secondary);
  max-width: 560px; line-height: 1.7; margin-bottom: 28px;
}
.bl-hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.bl-cat-hero-visual {
  position: relative; border-radius: var(--bl-radius); overflow: hidden;
  border: 1px solid var(--bl-border);
  box-shadow: var(--bl-shadow-card);
}
.bl-cat-hero-visual::after {
  content: ''; position: absolute; inset: 0;
  background: rgba(0, 212, 255, 0.08); mix-blend-mode: screen; pointer-events: none;
}
.bl-cat-hero-visual img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.bl-cat-hero-visual .bl-glass-tag {
  position: absolute; left: 16px; bottom: 16px;
  padding: 8px 16px; border-radius: 10px;
  background: rgba(10, 17, 30, 0.6); border: 1px solid rgba(255,255,255,0.12);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  font-size: 0.8125rem; color: var(--bl-accent);
  display: flex; align-items: center; gap: 8px;
}

.bl-stats {
  padding: 48px 0; border-bottom: 1px solid rgba(255,255,255,0.06);
}
.bl-stats .stat-item { text-align: center; padding: 24px 16px; }
.bl-stats .stat-num {
  font-family: "DIN Alternate", "Roboto Mono", monospace;
  font-size: clamp(1.75rem, 3vw, 2.5rem); font-weight: 700;
  color: var(--bl-primary); line-height: 1.2;
  text-shadow: 0 0 16px rgba(0, 212, 255, 0.3);
}
.bl-stats .stat-label { font-size: 0.875rem; color: var(--bl-text-secondary); margin-top: 8px; }

.bl-doc-section { padding: var(--bl-space) 0; }
.bl-doc-nav-wrap { position: relative; }
.bl-doc-nav {
  position: sticky; top: 96px;
  padding: 24px; border-radius: var(--bl-radius);
  background: var(--bl-surface); border: 1px solid var(--bl-border);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--bl-shadow-card);
}
.bl-doc-nav h4 {
  font-size: 0.8125rem; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--bl-text-secondary); margin-bottom: 16px;
}
.bl-doc-nav-list li { margin-bottom: 6px; }
.bl-doc-nav-list a {
  display: block; padding: 10px 14px; border-radius: 8px;
  font-size: 0.9375rem; color: var(--bl-text-secondary);
  border-left: 2px solid transparent; transition: all .25s ease;
}
.bl-doc-nav-list a:hover { color: var(--bl-primary); background: rgba(0, 212, 255, 0.04); }
.bl-doc-nav-list a.active {
  color: var(--bl-primary); background: rgba(0, 212, 255, 0.06);
  border-left-color: var(--bl-primary);
}
.bl-doc-content { scroll-margin-top: 96px; }
.bl-doc-item {
  padding: 40px; margin-bottom: 32px;
  background: var(--bl-surface); border: 1px solid var(--bl-border);
  border-radius: var(--bl-radius);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  transition: border-color .3s ease, transform .3s ease;
  scroll-margin-top: 100px;
}
.bl-doc-item:hover { border-color: var(--bl-border-bright); transform: translateY(-4px); }
.bl-doc-item h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 650; line-height: 1.3; margin-bottom: 16px;
}
.bl-doc-item p { margin-bottom: 16px; color: var(--bl-text-secondary); line-height: 1.75; }
.bl-doc-item ul { margin-top: 12px; }
.bl-doc-item ul li {
  position: relative; padding-left: 24px; margin-bottom: 10px;
  color: var(--bl-text-secondary);
}
.bl-doc-item ul li::before {
  content: ''; position: absolute; left: 0; top: 11px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--bl-primary); box-shadow: 0 0 8px rgba(0, 212, 255, 0.5);
}
.bl-doc-media {
  position: relative; overflow: hidden; border-radius: 12px;
  border: 1px solid var(--bl-border); box-shadow: var(--bl-shadow-card);
}
.bl-doc-media::after {
  content: ''; position: absolute; inset: 0;
  background: rgba(0, 212, 255, 0.08); mix-blend-mode: screen; pointer-events: none;
}
.bl-doc-media img { width: 100%; aspect-ratio: 16/10; object-fit: cover; transition: transform .4s ease; }
.bl-doc-item:hover .bl-doc-media img { transform: scale(1.03); }
.bl-doc-steps { margin-top: 24px; }
.bl-step {
  display: flex; gap: 20px; padding: 20px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.bl-step:last-child { border-bottom: none; }
.bl-step-num {
  display: flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 50%;
  border: 2px solid var(--bl-primary); color: var(--bl-primary);
  font-weight: 700; font-size: 1.125rem; flex-shrink: 0;
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.2);
}
.bl-step-body h3 { font-size: 1.125rem; font-weight: 600; margin-bottom: 6px; }
.bl-step-body p { color: var(--bl-text-secondary); font-size: 0.9375rem; margin-bottom: 0; }

.bl-scenarios { padding: var(--bl-space) 0; background: var(--bl-bg-deep); border-top: 1px solid rgba(255,255,255,0.06); border-bottom: 1px solid rgba(255,255,255,0.06); }
.bl-section-title {
  font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 650; line-height: 1.3;
  text-align: center; margin-bottom: 12px;
}
.bl-section-sub { text-align: center; color: var(--bl-text-secondary); max-width: 640px; margin: 0 auto 48px; font-size: 1rem; }
.bl-scenario-card {
  padding: 32px; border-radius: var(--bl-radius);
  background: var(--bl-surface); border: 1px solid var(--bl-border);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  transition: all .3s ease; height: 100%;
}
.bl-scenario-card:hover { border-color: var(--bl-border-bright); transform: translateY(-6px); box-shadow: var(--bl-shadow-card); }
.bl-scenario-card .bl-ico {
  display: flex; align-items: center; justify-content: center;
  width: 52px; height: 52px; border-radius: 12px;
  background: rgba(0, 212, 255, 0.1); border: 1px solid rgba(0, 212, 255, 0.25);
  color: var(--bl-primary); font-size: 1.375rem; margin-bottom: 20px;
  box-shadow: var(--bl-glow-soft);
}
.bl-scenario-card h3 { font-size: 1.25rem; font-weight: 600; margin-bottom: 12px; }
.bl-scenario-card p { color: var(--bl-text-secondary); font-size: 0.9375rem; margin-bottom: 16px; }
.bl-scenario-card .bl-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.bl-tag {
  display: inline-block; padding: 4px 12px; border-radius: 999px;
  background: rgba(126, 200, 227, 0.1); color: var(--bl-accent);
  font-size: 0.75rem; border: 1px solid rgba(126, 200, 227, 0.2);
}

.bl-faq { padding: var(--bl-space) 0; }
.bl-faq-list { max-width: 860px; margin: 0 auto; }
.bl-faq-item {
  background: var(--bl-surface); border: 1px solid var(--bl-border);
  border-radius: 12px; margin-bottom: 16px; overflow: hidden;
  transition: border-color .3s ease;
}
.bl-faq-item.is-open { border-color: var(--bl-border-bright); }
.bl-faq-trigger {
  display: flex; align-items: center; gap: 16px;
  width: 100%; padding: 22px 24px; text-align: left;
  font-size: 1rem; font-weight: 600; color: var(--bl-text);
  background: transparent; transition: color .25s ease;
  min-height: 64px;
}
.bl-faq-trigger:hover { color: var(--bl-primary); }
.bl-faq-q { color: var(--bl-primary); font-weight: 700; font-size: 1.125rem; }
.bl-faq-icon {
  margin-left: auto; flex-shrink: 0; font-size: 1.25rem; font-weight: 400;
  color: var(--bl-accent); transition: transform .3s ease; width: 24px; text-align: center;
}
.bl-faq-item.is-open .bl-faq-icon { transform: rotate(45deg); }
.bl-faq-panel {
  max-height: 0; overflow: hidden; transition: max-height .3s ease;
}
.bl-faq-item.is-open .bl-faq-panel { max-height: 600px; }
.bl-faq-panel p { padding: 0 24px 22px 64px; color: var(--bl-text-secondary); font-size: 0.9375rem; line-height: 1.75; }

.bl-cta {
  padding: var(--bl-space) 0;
  background-image: linear-gradient(rgba(10,17,30,0.9), rgba(10,17,30,0.92)), url('/assets/images/backpic/back-2.webp');
  background-size: cover; background-position: center;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.bl-cta-box {
  max-width: 800px; margin: 0 auto; text-align: center;
  padding: 56px 48px; border-radius: 20px;
  background: rgba(255,255,255,0.06); border: 1px solid rgba(0, 212, 255, 0.25);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 0 36px rgba(0, 212, 255, 0.15);
}
.bl-cta-box h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 650; margin-bottom: 16px; }
.bl-cta-box p { color: var(--bl-text-secondary); margin-bottom: 28px; font-size: 1rem; }
.bl-cta-box .bl-hero-actions { justify-content: center; }

.bl-footer { background: var(--bl-bg-deep); border-top: 1px solid rgba(255,255,255,0.06); padding-top: 64px; }
.bl-footer-grid { row-gap: 32px; }
.bl-footer-brand p { color: var(--bl-text-secondary); font-size: 0.9375rem; margin-top: 16px; max-width: 320px; line-height: 1.7; }
.bl-footer h4 { font-size: 0.9375rem; font-weight: 600; color: var(--bl-text); margin-bottom: 20px; }
.bl-footer-nav-list li { margin-bottom: 12px; }
.bl-footer-nav-list a { color: var(--bl-text-secondary); font-size: 0.9375rem; transition: color .25s ease, padding-left .25s ease; }
.bl-footer-nav-list a:hover { color: var(--bl-primary); padding-left: 6px; }
.bl-footer-subscribe p { font-size: 0.8125rem; color: var(--bl-text-secondary); margin-bottom: 12px; }
.bl-footer-subscribe form { display: flex; gap: 8px; }
.bl-footer-subscribe input {
  flex: 1; min-width: 0; height: 40px; padding: 0 12px;
  background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.15);
  border-radius: 8px; color: var(--bl-text); font-size: 0.875rem;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.bl-footer-subscribe input:focus { border-color: var(--bl-primary); box-shadow: 0 0 12px rgba(0, 212, 255, 0.15); outline: none; }
.bl-footer-subscribe input::placeholder { color: rgba(148, 169, 188, 0.6); }
.bl-footer-subscribe button { height: 40px; padding: 0 16px; font-size: 0.8125rem; }
.bl-footer-contact-item { color: var(--bl-text-secondary); font-size: 0.9375rem; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.bl-footer-contact-item i { color: var(--bl-primary); width: 16px; text-align: center; }
.bl-copyright {
  border-top: 1px solid rgba(255,255,255,0.06); margin-top: 48px;
  padding: 20px 0; color: var(--bl-text-secondary); font-size: 13px; text-align: center;
}

@media (max-width: 1023.98px) {
  .bl-nav-link { font-size: 0.875rem; padding: 8px 12px; }
  .bl-doc-nav-wrap { display: none; }
  .bl-doc-content .cell { flex: 0 0 100%; max-width: 100%; }
  .bl-doc-item { padding: 28px; }
}

@media (max-width: 639.98px) {
  .bl-container { padding: 0 16px; }
  .bl-burger { display: flex; }
  .bl-nav {
    position: absolute; top: 72px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 24px; background: rgba(10, 17, 30, 0.96);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--bl-border);
    display: none;
  }
  .bl-nav.is-open { display: flex; }
  .bl-logo { position: static; transform: none; }
  .bl-nav-left, .bl-nav-right { width: 100%; }
  .bl-nav-list { flex-direction: column; width: 100%; gap: 4px; }
  .bl-nav-link { width: 100%; justify-content: center; min-height: 48px; font-size: 1.05rem; }
  .bl-cat-hero { padding: 48px 0 40px; }
  .bl-cat-hero h1 { font-size: 2rem; }
  .bl-hero-actions { flex-direction: column; }
  .bl-hero-actions .bl-btn { width: 100%; }
  .bl-cat-hero-visual { order: -1; margin-bottom: 24px; }
  .bl-stats .cell { flex: 0 0 50%; max-width: 50%; }
  .bl-doc-section { padding: var(--bl-space-sm) 0; }
  .bl-doc-item { padding: 20px; }
  .bl-doc-media img { aspect-ratio: 16/11; }
  .bl-scenarios, .bl-faq, .bl-cta { padding: var(--bl-space-sm) 0; }
  .bl-scenario-card { padding: 24px; }
  .bl-cta-box { padding: 32px 20px; }
  .bl-footer { padding-top: 48px; }
  .bl-footer-grid { row-gap: 40px; }
  .bl-copyright { font-size: 0.75rem; }
}

@media (max-width: 1024px) {
  .bl-doc-nav-wrap { position: static; }
  .bl-doc-nav { position: static; margin-bottom: 32px; }
}

/* roulang page: article */
/* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: #0A111E;
            color: #EAF2F8;
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        img { max-width: 100%; display: block; }
        a { text-decoration: none; color: inherit; transition: color .25s ease, border-color .25s ease, background .25s ease, transform .25s ease, box-shadow .25s ease; }
        ul, ol { list-style: none; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; background: none; border: none; }
        :focus-visible { outline: 2px solid #00D4FF; outline-offset: 2px; }

        /* ===== 设计变量 ===== */
        :root {
            --bl-bg: #0A111E;
            --bl-bg-deep: #070D16;
            --bl-primary: #00D4FF;
            --bl-accent: #7EC8E3;
            --bl-warn: #FFB454;
            --bl-text: #EAF2F8;
            --bl-text-secondary: #94A9BC;
            --bl-glass-bg: rgba(255,255,255,0.06);
            --bl-glass-border: rgba(255,255,255,0.12);
            --bl-radius-lg: 16px;
            --bl-radius-sm: 10px;
            --bl-radius-btn: 8px;
            --bl-shadow: 0 8px 32px rgba(0,0,0,0.35);
            --bl-glow: 0 0 20px rgba(0,212,255,0.35);
            --bl-space: 96px;
            --bl-transition: .25s ease;
        }

        /* ===== 容器 ===== */
        .bl-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 按钮 ===== */
        .bl-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 0 26px;
            border-radius: 8px;
            font-size: .875rem;
            font-weight: 600;
            letter-spacing: .03em;
            cursor: pointer;
            transition: all .25s ease;
            border: 1px solid transparent;
            line-height: 1;
            white-space: nowrap;
        }
        .bl-btn-primary {
            background: #00D4FF;
            color: #0A111E;
            box-shadow: 0 0 20px rgba(0,212,255,0.35);
        }
        .bl-btn-primary:hover {
            background: #24DDFF;
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(0,212,255,0.55);
        }
        .bl-btn-primary:active { transform: translateY(0); }
        .bl-btn-outline {
            background: transparent;
            border-color: #00D4FF;
            color: #00D4FF;
        }
        .bl-btn-outline:hover {
            background: rgba(0,212,255,0.1);
            transform: translateY(-2px);
        }
        .bl-btn-outline:active { transform: translateY(0); }

        /* ===== 标签 ===== */
        .bl-tag {
            display: inline-block;
            padding: 3px 14px;
            background: rgba(0,212,255,0.1);
            border: 1px solid rgba(0,212,255,0.25);
            color: #00D4FF;
            border-radius: 999px;
            font-size: .75rem;
            letter-spacing: .02em;
            font-weight: 500;
        }

        /* ===== 导航 ===== */
        .bl-header {
            position: sticky;
            top: 0;
            z-index: 200;
            background: rgba(10,17,30,0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .bl-header .bl-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .bl-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 20px;
        }
        .bl-nav-left, .bl-nav-right {
            flex: 1;
            display: flex;
        }
        .bl-nav-left .bl-nav-list { justify-content: flex-start; }
        .bl-nav-right .bl-nav-list { justify-content: flex-end; }
        .bl-nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .bl-nav-link {
            display: inline-flex;
            align-items: center;
            height: 40px;
            padding: 0 18px;
            font-size: .875rem;
            font-weight: 500;
            color: #94A9BC;
            border-radius: 6px;
            transition: color .25s ease, background .25s ease, box-shadow .25s ease;
            position: relative;
        }
        .bl-nav-link:hover {
            color: #00D4FF;
            background: rgba(0,212,255,0.06);
        }
        .bl-nav-link.active {
            color: #00D4FF;
            background: rgba(0,212,255,0.08);
            box-shadow: inset 0 -2px 0 #00D4FF;
        }
        .bl-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: #EAF2F8;
            letter-spacing: .01em;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .bl-logo-icon {
            width: 38px;
            height: 38px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(0,212,255,0.12);
            border: 1px solid rgba(0,212,255,0.35);
            color: #00D4FF;
            font-size: 1.05rem;
            box-shadow: 0 0 16px rgba(0,212,255,0.2);
        }
        .bl-burger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 14px;
            cursor: pointer;
            background: transparent;
            border: none;
            z-index: 1001;
        }
        .bl-burger span {
            display: block;
            width: 22px;
            height: 2px;
            background: #EAF2F8;
            border-radius: 2px;
            transition: all .3s ease;
        }
        .bl-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); background: #00D4FF; }
        .bl-burger.open span:nth-child(2) { opacity: 0; }
        .bl-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); background: #00D4FF; }

        /* ===== 移动端菜单 ===== */
        .bl-mobile-menu {
            display: flex;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(10,17,30,0.96);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 8px;
            opacity: 0;
            visibility: hidden;
            transition: opacity .3s ease, visibility .3s ease;
        }
        .bl-mobile-menu.open {
            opacity: 1;
            visibility: visible;
        }
        .bl-mobile-link {
            font-size: 1.15rem;
            font-weight: 600;
            color: #94A9BC;
            padding: 12px 30px;
            border-radius: 8px;
            transition: color .25s ease, background .25s ease;
        }
        .bl-mobile-link:hover,
        .bl-mobile-link.active {
            color: #00D4FF;
            background: rgba(0,212,255,0.08);
        }

        /* ===== 面包屑 ===== */
        .bl-breadcrumb {
            padding: 24px 0 8px;
            font-size: .8125rem;
            color: #94A9BC;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0;
        }
        .bl-breadcrumb a {
            color: #94A9BC;
            padding: 4px 0;
            transition: color .25s ease;
        }
        .bl-breadcrumb a:hover { color: #00D4FF; }
        .bl-breadcrumb .sep {
            margin: 0 10px;
            color: rgba(255,255,255,0.3);
        }
        .bl-breadcrumb .current {
            color: #7EC8E3;
            max-width: 320px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* ===== 文章主区 ===== */
        .bl-article-main {
            padding-bottom: 40px;
        }

        /* ===== 文章头部 ===== */
        .bl-article-header {
            padding: 32px 0 28px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            text-align: center;
            max-width: 860px;
            margin: 0 auto;
        }
        .bl-article-header h1 {
            font-size: clamp(1.6rem, 3.2vw, 2.4rem);
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -.02em;
            margin: 12px 0 18px;
            color: #EAF2F8;
        }
        .bl-article-meta {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px 28px;
            font-size: .8125rem;
            color: #94A9BC;
        }
        .bl-article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .bl-article-meta i {
            color: #00D4FF;
            opacity: .75;
        }

        /* ===== 文章正文 ===== */
        .bl-article-body {
            max-width: 820px;
            margin: 0 auto;
            padding: 36px 0 24px;
            font-size: 16px;
            line-height: 1.75;
            color: #C6D6E4;
            word-break: break-word;
        }
        .bl-article-body h2 {
            font-size: clamp(1.4rem, 2.5vw, 1.8rem);
            font-weight: 650;
            margin: 44px 0 16px;
            line-height: 1.3;
            color: #EAF2F8;
            padding-left: 14px;
            border-left: 3px solid #00D4FF;
        }
        .bl-article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 32px 0 14px;
            line-height: 1.4;
            color: #EAF2F8;
        }
        .bl-article-body p {
            margin-bottom: 24px;
            color: #C6D6E4;
        }
        .bl-article-body a {
            color: #00D4FF;
            border-bottom: 1px solid rgba(0,212,255,0.3);
            transition: border-color .25s ease;
        }
        .bl-article-body a:hover {
            border-bottom-color: #00D4FF;
        }
        .bl-article-body blockquote {
            margin: 32px 0;
            padding: 18px 24px;
            background: rgba(0,212,255,0.05);
            border-left: 3px solid #00D4FF;
            border-radius: 0 10px 10px 0;
            color: #7EC8E3;
            font-style: normal;
        }
        .bl-article-body ul,
        .bl-article-body ol {
            margin: 0 0 24px;
            padding-left: 24px;
        }
        .bl-article-body ul { list-style: disc; }
        .bl-article-body ol { list-style: decimal; }
        .bl-article-body li {
            margin-bottom: 8px;
            color: #C6D6E4;
        }
        .bl-article-body li::marker {
            color: #00D4FF;
        }
        .bl-article-body code {
            font-family: "DIN Alternate", "Roboto Mono", "Courier New", monospace;
            background: rgba(255,255,255,0.08);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: .875em;
            color: #00D4FF;
        }
        .bl-article-body pre {
            background: #0D1526;
            border: 1px solid rgba(255,255,255,0.12);
            border-radius: 10px;
            padding: 20px;
            overflow-x: auto;
            margin: 24px 0;
            line-height: 1.6;
        }
        .bl-article-body pre code {
            background: none;
            padding: 0;
            color: #7EC8E3;
        }
        .bl-article-body img {
            border-radius: 12px;
            box-shadow: 0 8px 32px rgba(0,0,0,0.35);
            margin: 28px auto;
            height: auto;
        }
        .bl-article-body hr {
            border: none;
            height: 1px;
            background: rgba(255,255,255,0.08);
            margin: 44px 0;
        }
        .bl-article-body strong {
            color: #EAF2F8;
            font-weight: 650;
        }
        .bl-article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: .875rem;
        }
        .bl-article-body th {
            background: rgba(0,212,255,0.08);
            color: #EAF2F8;
            padding: 12px 14px;
            text-align: left;
            font-weight: 600;
            border: 1px solid rgba(255,255,255,0.1);
        }
        .bl-article-body td {
            padding: 12px 14px;
            border: 1px solid rgba(255,255,255,0.08);
            color: #C6D6E4;
        }

        /* ===== 文章标签 ===== */
        .bl-article-tags {
            max-width: 820px;
            margin: 0 auto;
            padding: 20px 0 8px;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            border-top: 1px solid rgba(255,255,255,0.06);
        }

        /* ===== 相关推荐 ===== */
        .bl-related {
            max-width: 860px;
            margin: 40px auto 0;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .bl-related h2 {
            font-size: 1.35rem;
            font-weight: 650;
            margin-bottom: 24px;
            color: #EAF2F8;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .bl-related h2::before {
            content: '';
            width: 4px;
            height: 22px;
            background: #00D4FF;
            border-radius: 2px;
            box-shadow: 0 0 12px rgba(0,212,255,0.5);
        }
        .bl-related-card {
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(255,255,255,0.12);
            border-radius: 10px;
            padding: 14px;
            display: flex;
            gap: 16px;
            transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
            height: 100%;
            align-items: center;
        }
        .bl-related-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0,212,255,0.5);
            box-shadow: 0 8px 32px rgba(0,0,0,0.35);
        }
        .bl-related-card img {
            width: 132px;
            height: 88px;
            object-fit: cover;
            border-radius: 8px;
            flex-shrink: 0;
            background: rgba(0,212,255,0.05);
            filter: saturate(1.02) contrast(1.02);
        }
        .bl-related-info {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 6px;
        }
        .bl-related-info h4 {
            font-size: .9375rem;
            font-weight: 600;
            color: #EAF2F8;
            line-height: 1.4;
            margin: 2px 0 0;
        }
        .bl-related-info .bl-related-link {
            font-size: .8125rem;
            color: #00D4FF;
            font-weight: 500;
            transition: color .25s ease;
        }
        .bl-related-info .bl-related-link:hover {
            color: #24DDFF;
        }
        .bl-related-back {
            margin-top: 32px;
            text-align: center;
        }

        /* ===== 空状态 ===== */
        .bl-article-empty {
            max-width: 640px;
            margin: 60px auto;
            padding: 64px 32px;
            text-align: center;
            background: rgba(255,255,255,0.06);
            border: 1px dashed rgba(255,255,255,0.2);
            border-radius: 16px;
        }
        .bl-article-empty h1 {
            font-size: 1.75rem;
            font-weight: 700;
            color: #EAF2F8;
            margin-bottom: 12px;
        }
        .bl-article-empty p {
            color: #94A9BC;
            margin-bottom: 24px;
        }

        /* ===== CTA ===== */
        .bl-cta-section {
            padding: 72px 0 88px;
        }
        .bl-cta {
            background:
                radial-gradient(ellipse at center, rgba(0,212,255,0.15) 0%, transparent 70%),
                linear-gradient(rgba(7,13,22,0.88), rgba(7,13,22,0.88)),
                url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            border: 1px solid rgba(0,212,255,0.3);
            border-radius: 16px;
            padding: 56px 40px;
            text-align: center;
            box-shadow: 0 8px 32px rgba(0,0,0,0.35), 0 0 40px rgba(0,212,255,0.08);
            position: relative;
            overflow: hidden;
        }
        .bl-cta h2 {
            font-size: clamp(1.4rem, 2.6vw, 1.9rem);
            font-weight: 650;
            color: #EAF2F8;
            margin-bottom: 10px;
        }
        .bl-cta p {
            color: #94A9BC;
            margin-bottom: 24px;
            font-size: .9375rem;
        }
        .bl-cta-form {
            display: flex;
            max-width: 460px;
            margin: 0 auto;
            gap: 0;
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(255,255,255,0.15);
            border-radius: 8px;
            padding: 4px;
            backdrop-filter: blur(8px);
        }
        .bl-cta-form input[type="email"] {
            flex: 1;
            background: transparent;
            border: none;
            padding: 0 16px;
            height: 44px;
            font-size: .875rem;
            color: #EAF2F8;
            outline: none;
        }
        .bl-cta-form input[type="email"]::placeholder {
            color: #94A9BC;
        }
        .bl-cta-form .bl-btn {
            min-height: 40px;
            padding: 0 20px;
            font-size: .8125rem;
            border-radius: 6px;
            flex-shrink: 0;
        }

        /* ===== 页脚 ===== */
        .bl-footer {
            background: #070D16;
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 64px;
        }
        .bl-footer-grid {
            padding-bottom: 48px;
        }
        .bl-footer-brand .bl-logo {
            margin-bottom: 14px;
        }
        .bl-footer-brand p {
            font-size: .875rem;
            color: #94A9BC;
            max-width: 260px;
            line-height: 1.6;
        }
        .bl-footer h4 {
            font-size: .875rem;
            font-weight: 600;
            color: #EAF2F8;
            margin-bottom: 16px;
            letter-spacing: .02em;
        }
        .bl-footer-nav-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .bl-footer-nav-list a {
            font-size: .8125rem;
            color: #94A9BC;
            transition: color .25s ease;
        }
        .bl-footer-nav-list a:hover {
            color: #00D4FF;
        }
        .bl-footer-subscribe form {
            display: flex;
            gap: 8px;
        }
        .bl-footer-subscribe input[type="email"] {
            flex: 1;
            background: rgba(255,255,255,0.04);
            border: 1px solid rgba(255,255,255,0.15);
            border-radius: 8px;
            padding: 0 12px;
            height: 40px;
            font-size: .8125rem;
            color: #EAF2F8;
            outline: none;
            transition: border-color .25s ease, box-shadow .25s ease;
        }
        .bl-footer-subscribe input[type="email"]:focus {
            border-color: #00D4FF;
            box-shadow: 0 0 0 2px rgba(0,212,255,0.2);
        }
        .bl-footer-subscribe input[type="email"]::placeholder {
            color: #7EC8E3;
            opacity: .7;
        }
        .bl-footer-contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: .875rem;
            color: #94A9BC;
            margin-bottom: 10px;
        }
        .bl-footer-contact-item i {
            color: #00D4FF;
            width: 16px;
            text-align: center;
            font-size: .875rem;
        }
        .bl-copyright {
            border-top: 1px solid rgba(255,255,255,0.05);
            padding: 20px 0;
            text-align: center;
            color: #94A9BC;
            font-size: .8125rem;
        }

        /* ===== 响应式 ===== */
        @media screen and (max-width: 1024px) {
            .bl-nav-link {
                padding: 0 14px;
                font-size: .8125rem;
            }
            .bl-logo {
                font-size: 1.15rem;
            }
            .bl-article-body {
                font-size: 15px;
            }
            .bl-footer-grid .cell {
                margin-bottom: 24px;
            }
        }

        @media screen and (max-width: 768px) {
            :root {
                --bl-space: 56px;
            }
            .bl-container {
                padding: 0 16px;
            }
            .bl-nav-left,
            .bl-nav-right {
                display: none;
            }
            .bl-nav {
                justify-content: center;
            }
            .bl-burger {
                display: flex;
                position: absolute;
                right: 8px;
                top: 50%;
                transform: translateY(-50%);
            }
            .bl-breadcrumb {
                padding: 16px 0 4px;
                font-size: .75rem;
            }
            .bl-article-header {
                padding: 24px 0 20px;
                text-align: left;
            }
            .bl-article-header h1 {
                font-size: 1.45rem;
                line-height: 1.35;
            }
            .bl-article-meta {
                justify-content: flex-start;
                gap: 8px 18px;
            }
            .bl-article-body {
                padding: 24px 0 16px;
                font-size: 15px;
                line-height: 1.75;
            }
            .bl-article-body h2 {
                margin: 32px 0 14px;
                font-size: 1.3rem;
            }
            .bl-article-body h3 {
                font-size: 1.15rem;
            }
            .bl-related {
                margin-top: 32px;
                padding-top: 32px;
            }
            .bl-related-card {
                margin-bottom: 12px;
                padding: 12px;
            }
            .bl-cta-section {
                padding: 48px 0 64px;
            }
            .bl-cta {
                padding: 40px 20px;
            }
            .bl-cta-form {
                flex-direction: column;
                gap: 8px;
                background: transparent;
                border: none;
                padding: 0;
            }
            .bl-cta-form input[type="email"] {
                background: rgba(255,255,255,0.06);
                border: 1px solid rgba(255,255,255,0.15);
                border-radius: 8px;
                height: 44px;
            }
            .bl-cta-form .bl-btn {
                width: 100%;
                min-height: 44px;
            }
        }

        @media screen and (max-width: 520px) {
            .bl-footer-grid {
                gap: 8px;
            }
            .bl-footer-subscribe form {
                flex-direction: column;
            }
            .bl-footer-subscribe .bl-btn {
                width: 100%;
                min-height: 40px;
            }
            .bl-related-card img {
                width: 100px;
                height: 72px;
            }
            .bl-article-header h1 {
                font-size: 1.3rem;
            }
            .bl-breadcrumb .sep {
                margin: 0 6px;
            }
            .bl-breadcrumb .current {
                max-width: 180px;
            }
        }

/* roulang page: category2 */
/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bl-bg: #0A111E;
  --bl-bg-deep: #070D16;
  --bl-primary: #00D4FF;
  --bl-accent: #7EC8E3;
  --bl-warning: #FFB454;
  --bl-text: #EAF2F8;
  --bl-text-secondary: #94A9BC;
  --bl-border: rgba(255,255,255,0.12);
  --bl-card-bg: rgba(255,255,255,0.06);
  --bl-glow: 0 0 20px rgba(0,212,255,0.35);
  --bl-radius-lg: 16px;
  --bl-radius: 10px;
  --bl-radius-sm: 8px;
  --bl-space: 96px;
}
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bl-bg);
  color: var(--bl-text);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color .25s ease; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: 100%; }
button { cursor: pointer; background: none; border: none; }
input:focus, button:focus, a:focus { outline: 2px solid var(--bl-primary); outline-offset: 2px; }

/* ===== Container ===== */
.bl-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Section / Layout ===== */
.bl-section { padding: var(--bl-space) 0; }
.bl-section-alt { background: var(--bl-bg-deep); }
.bl-section-head { text-align: center; max-width: 680px; margin: 0 auto 48px; }
.bl-section-head h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 650; line-height: 1.3; letter-spacing: -0.01em; margin-bottom: 12px; }
.bl-section-head p { color: var(--bl-text-secondary); font-size: 1rem; }
.bl-eyebrow {
  display: inline-block;
  font-size: .7813rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--bl-primary);
  background: rgba(0,212,255,.1);
  border: 1px solid rgba(0,212,255,.25);
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}

/* ===== Header / Nav ===== */
.bl-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10,17,30,.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  height: 72px;
}
.bl-header .bl-container { height: 100%; display: flex; align-items: center; justify-content: center; }
.bl-nav { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.bl-nav-left, .bl-nav-right { flex: 1; display: flex; }
.bl-nav-right { justify-content: flex-end; }
.bl-nav-list { display: flex; align-items: center; gap: 28px; }
.bl-nav-link {
  font-size: .9375rem;
  color: var(--bl-text-secondary);
  font-weight: 500;
  padding: 8px 4px;
  position: relative;
  transition: color .25s ease;
}
.bl-nav-link:hover { color: var(--bl-text); }
.bl-nav-link.active { color: var(--bl-primary); }
.bl-nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--bl-primary);
  box-shadow: var(--bl-glow);
  border-radius: 2px;
}
.bl-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.bl-logo-icon {
  width: 38px; height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,212,255,.12);
  border: 1px solid rgba(0,212,255,.3);
  border-radius: 10px;
  color: var(--bl-primary);
  font-size: 1.0625rem;
  box-shadow: 0 0 16px rgba(0,212,255,.15);
}
.bl-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px; height: 44px;
  padding: 10px;
  border-radius: var(--bl-radius-sm);
}
.bl-burger span { display: block; height: 2px; background: var(--bl-text); border-radius: 2px; transition: all .3s ease; }
.bl-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.bl-burger.open span:nth-child(2) { opacity: 0; }
.bl-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu panel */
.bl-mobile-menu {
  position: fixed;
  top: 72px; left: 0; right: 0;
  background: rgba(10,17,30,.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  padding: 16px 24px 24px;
  display: none;
  z-index: 999;
}
.bl-mobile-menu.open { display: block; }
.bl-mobile-menu .bl-nav-list { flex-direction: column; align-items: flex-start; gap: 4px; }
.bl-mobile-menu .bl-nav-link { font-size: 1.15rem; line-height: 2.5; display: block; padding: 0; width: 100%; }

/* ===== Buttons ===== */
.bl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 24px;
  border-radius: var(--bl-radius-sm);
  font-size: .9375rem;
  font-weight: 600;
  transition: all .25s ease;
  white-space: nowrap;
}
.bl-btn-primary {
  background: var(--bl-primary);
  color: #0A111E;
  box-shadow: 0 4px 20px rgba(0,212,255,.25);
}
.bl-btn-primary:hover { background: #33ddff; box-shadow: 0 6px 28px rgba(0,212,255,.4); transform: translateY(-2px); color: #0A111E; }
.bl-btn-primary:active { transform: translateY(0); box-shadow: 0 2px 12px rgba(0,212,255,.2); }
.bl-btn-outline {
  background: transparent;
  color: var(--bl-primary);
  border: 1px solid var(--bl-primary);
}
.bl-btn-outline:hover { background: rgba(0,212,255,.1); transform: translateY(-2px); }
.bl-btn-ghost {
  background: transparent;
  color: var(--bl-text-secondary);
  border: 1px solid rgba(255,255,255,.15);
}
.bl-btn-ghost:hover { color: var(--bl-text); border-color: rgba(255,255,255,.35); }

/* ===== Page Hero Banner ===== */
.bl-page-hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  margin-top: 72px;
  overflow: hidden;
  background: var(--bl-bg-deep);
}
.bl-page-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: .5;
}
.bl-page-hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(0,212,255,.14), transparent 60%), linear-gradient(90deg, rgba(10,17,30,.9) 0%, rgba(10,17,30,.7) 50%, rgba(10,17,30,.85) 100%);
}
.bl-page-hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
  padding: 60px 24px;
}
.bl-page-hero-content h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.bl-page-hero-desc {
  font-size: 1.0625rem;
  color: var(--bl-text-secondary);
  max-width: 560px;
  margin-bottom: 28px;
  line-height: 1.8;
}
.bl-hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ===== Stats ===== */
.bl-stats {
  padding: 48px 0;
  border-bottom: 1px solid rgba(255,255,255,.06);
  background: var(--bl-bg);
}
.bl-stat-card {
  text-align: center;
  padding: 28px 16px;
  background: var(--bl-card-bg);
  border: 1px solid var(--bl-border);
  border-radius: var(--bl-radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: border-color .25s ease;
}
.bl-stat-card:hover { border-color: rgba(0,212,255,.4); }
.bl-stat-num {
  font-family: "DIN Alternate", "Roboto Mono", monospace;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--bl-primary);
  line-height: 1.2;
  margin-bottom: 4px;
}
.bl-stat-label { font-size: .875rem; color: var(--bl-text-secondary); }

/* ===== Parameter Cards ===== */
.bl-params { padding: var(--bl-space) 0; }
.bl-param-card {
  background: var(--bl-card-bg);
  border: 1px solid var(--bl-border);
  border-radius: var(--bl-radius-lg);
  padding: 28px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: all .25s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.bl-param-card:hover { border-color: rgba(0,212,255,.5); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,.45), 0 0 20px rgba(0,212,255,.05); }
.bl-param-head { display: flex; align-items: center; gap: 16px; margin-bottom: 22px; }
.bl-param-icon {
  width: 48px; height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(0,212,255,.1);
  border: 1px solid rgba(0,212,255,.25);
  color: var(--bl-primary);
  font-size: 1.25rem;
  flex-shrink: 0;
}
.bl-param-head h3 { font-size: 1.25rem; font-weight: 600; line-height: 1.3; }
.bl-param-tag {
  display: inline-block;
  font-size: .75rem;
  font-weight: 500;
  color: var(--bl-primary);
  background: rgba(0,212,255,.08);
  border: 1px solid rgba(0,212,255,.2);
  border-radius: 999px;
  padding: 2px 10px;
  margin-top: 4px;
}
.bl-param-specs { display: flex; flex-direction: column; gap: 0; margin-top: auto; }
.bl-param-specs .spec {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,.06);
  font-size: .875rem;
}
.bl-param-specs .spec:last-child { border-bottom: none; }
.bl-param-specs .spec span { color: var(--bl-text-secondary); font-size: .8125rem; flex-shrink: 0; margin-right: 12px; }
.bl-param-specs .spec strong { text-align: right; font-weight: 600; color: var(--bl-text); }
.bl-param-card .bl-btn { margin-top: 20px; align-self: flex-start; }

/* Featured card */
.bl-featured .bl-param-card {
  border-color: rgba(0,212,255,.4);
  box-shadow: 0 0 24px rgba(0,212,255,.06);
}
.bl-featured .bl-param-card::before {
  content: "热选";
  position: absolute;
  top: 16px; right: 16px;
  background: var(--bl-primary);
  color: #0A111E;
  font-size: .75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
  box-shadow: var(--bl-glow);
}
.bl-param-card { position: relative; }

/* ===== Scenarios ===== */
.bl-scenarios {
  padding: var(--bl-space) 0;
  background: linear-gradient(0deg, rgba(10,17,30,1) 0%, rgba(7,13,22,1) 100%);
  border-top: 1px solid rgba(255,255,255,.04);
  border-bottom: 1px solid rgba(255,255,255,.04);
}
.bl-scenario-image {
  border-radius: var(--bl-radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: 0 16px 48px rgba(0,0,0,.5);
}
.bl-scenario-image img { width: 100%; height: 100%; object-fit: cover; }
.bl-scenario-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0,212,255,.08);
  mix-blend-mode: screen;
  pointer-events: none;
}
.bl-scenario-list { display: flex; flex-direction: column; gap: 20px; margin-top: 24px; }
.bl-scenario-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px;
  border-radius: var(--bl-radius);
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.06);
  transition: all .25s ease;
}
.bl-scenario-item:hover { border-color: rgba(0,212,255,.3); background: rgba(0,212,255,.04); transform: translateX(4px); }
.bl-scenario-icon {
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border-radius: 10px;
  background: rgba(0,212,255,.1);
  color: var(--bl-primary);
  font-size: 1rem;
}
.bl-scenario-item h3 { font-size: 1.0625rem; font-weight: 600; margin-bottom: 2px; }
.bl-scenario-item p { font-size: .875rem; color: var(--bl-text-secondary); line-height: 1.6; }

/* ===== Timeline ===== */
.bl-flow { padding: var(--bl-space) 0; }
.bl-flow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 16px;
}
.bl-flow-step {
  position: relative;
  padding: 28px 20px;
  background: var(--bl-card-bg);
  border: 1px solid var(--bl-border);
  border-radius: var(--bl-radius-lg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: all .25s ease;
}
.bl-flow-step:hover { border-color: rgba(0,212,255,.4); transform: translateY(-4px); }
.bl-flow-num {
  font-family: "DIN Alternate", "Roboto Mono", monospace;
  font-size: 2rem;
  font-weight: 700;
  color: rgba(0,212,255,.3);
  line-height: 1;
  margin-bottom: 14px;
}
.bl-flow-step h3 { font-size: 1.0625rem; font-weight: 600; margin-bottom: 6px; }
.bl-flow-step p { font-size: .875rem; color: var(--bl-text-secondary); line-height: 1.6; }

/* ===== Download Table ===== */
.bl-downloads { padding: var(--bl-space) 0; background: var(--bl-bg-deep); border-top: 1px solid rgba(255,255,255,.04); }
.bl-download-list {
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--bl-radius-lg);
  overflow: hidden;
}
.bl-download-row {
  display: grid;
  grid-template-columns: 1fr 100px 90px 96px;
  align-items: center;
  gap: 16px;
  padding: 16px 24px;
  border-bottom: 1px solid rgba(255,255,255,.05);
  transition: background .25s ease;
}
.bl-download-row:last-child { border-bottom: none; }
.bl-download-row:hover { background: rgba(0,212,255,.03); }
.bl-download-file { display: flex; align-items: center; gap: 12px; font-weight: 500; }
.bl-download-file i { color: var(--bl-primary); font-size: 1.125rem; }
.bl-download-version, .bl-download-size { font-size: .8125rem; color: var(--bl-text-secondary); }
.bl-download-btn {
  justify-self: end;
  min-height: 34px;
  padding: 0 16px;
  font-size: .8125rem;
  font-weight: 600;
  background: transparent;
  color: var(--bl-primary);
  border: 1px solid rgba(0,212,255,.35);
  border-radius: var(--bl-radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all .25s ease;
}
.bl-download-btn:hover { background: rgba(0,212,255,.1); border-color: var(--bl-primary); }

/* ===== FAQ ===== */
.bl-faq { padding: var(--bl-space) 0; }
.bl-faq-item {
  background: var(--bl-card-bg);
  border: 1px solid var(--bl-border);
  border-radius: var(--bl-radius);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color .25s ease;
}
.bl-faq-item:hover { border-color: rgba(0,212,255,.3); }
.bl-faq-item.open { border-color: rgba(0,212,255,.45); }
.bl-faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  font-size: .9375rem;
  font-weight: 600;
  color: var(--bl-text);
  text-align: left;
  cursor: pointer;
}
.bl-faq-q-mark { color: var(--bl-primary); font-weight: 700; margin-right: 12px; }
.bl-faq-toggle {
  width: 28px; height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.2);
  color: var(--bl-primary);
  font-size: .875rem;
  transition: all .3s ease;
  flex-shrink: 0;
  margin-left: 16px;
}
.bl-faq-item.open .bl-faq-toggle { transform: rotate(135deg); background: rgba(0,212,255,.1); border-color: rgba(0,212,255,.4); }
.bl-faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}
.bl-faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--bl-text-secondary);
  font-size: .875rem;
  line-height: 1.75;
  border-top: 1px solid rgba(255,255,255,.06);
  margin: 0 24px 0;
  padding-left: 0;
  padding-right: 0;
}
.bl-faq-answer-inner p { padding-top: 14px; }

/* ===== CTA ===== */
.bl-cta {
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.bl-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(0,212,255,.12) 0%, transparent 70%);
  pointer-events: none;
}
.bl-cta-panel {
  position: relative;
  z-index: 2;
  background: rgba(255,255,255,.06);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(0,212,255,.3);
  border-radius: var(--bl-radius-lg);
  padding: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  box-shadow: 0 0 40px rgba(0,212,255,.08);
}
.bl-cta-text h2 { font-size: clamp(1.5rem, 2.8vw, 2rem); font-weight: 700; line-height: 1.3; margin-bottom: 8px; }
.bl-cta-text p { color: var(--bl-text-secondary); font-size: .9375rem; max-width: 480px; }

/* ===== Footer ===== */
.bl-footer {
  background: var(--bl-bg-deep);
  border-top: 1px solid rgba(255,255,255,.05);
  padding: 64px 0 0;
}
.bl-footer-grid { row-gap: 32px; }
.bl-footer-brand .bl-logo { margin-bottom: 12px; }
.bl-footer-brand p { font-size: .875rem; color: var(--bl-text-secondary); line-height: 1.7; max-width: 300px; }
.bl-footer h4 {
  font-size: .9375rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--bl-text);
}
.bl-footer-nav-list { display: flex; flex-direction: column; gap: 8px; }
.bl-footer-nav-list a { font-size: .875rem; color: var(--bl-text-secondary); transition: color .25s ease; }
.bl-footer-nav-list a:hover { color: var(--bl-primary); }
.bl-footer-subscribe form { display: flex; gap: 8px; }
.bl-footer-subscribe input {
  flex: 1;
  min-width: 0;
  height: 40px;
  padding: 0 14px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--bl-radius-sm);
  color: var(--bl-text);
  font-size: .8125rem;
}
.bl-footer-subscribe input:focus { border-color: var(--bl-primary); box-shadow: 0 0 10px rgba(0,212,255,.15); }
.bl-footer-subscribe input::placeholder { color: var(--bl-text-secondary); }
.bl-footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .875rem;
  color: var(--bl-text-secondary);
  margin-bottom: 10px;
}
.bl-footer-contact-item i { color: var(--bl-primary); width: 18px; text-align: center; }
.bl-copyright {
  margin-top: 48px;
  padding: 20px 0;
  border-top: 1px solid rgba(255,255,255,.04);
  text-align: center;
  color: var(--bl-text-secondary);
  font-size: .8125rem;
}

/* ===== Responsive ===== */
@media screen and (max-width: 1024px) {
  :root { --bl-space: 72px; }
  .bl-nav-link { font-size: .875rem; }
  .bl-flow-steps { grid-template-columns: repeat(2, 1fr); }
  .bl-spec-pair { flex-direction: column; }
}
@media screen and (max-width: 639px) {
  :root { --bl-space: 56px; }
  .bl-header .bl-container { padding: 0 16px; }
  .bl-nav { display: none; }
  .bl-burger { display: flex; }
  .bl-page-hero { min-height: auto; padding: 80px 0 40px; }
  .bl-page-hero-content { padding: 24px 16px; }
  .bl-page-hero-desc { font-size: 1rem; }
  .bl-hero-actions { flex-direction: column; align-items: stretch; }
  .bl-hero-actions .bl-btn { width: 100%; }
  .bl-stats { padding: 32px 0; }
  .bl-stat-card { padding: 20px 12px; }
  .bl-param-card { padding: 20px; }
  .bl-flow-steps { grid-template-columns: 1fr; }
  .bl-download-row { grid-template-columns: 1fr; gap: 8px; padding: 16px; }
  .bl-download-btn { justify-self: start; margin-top: 6px; }
  .bl-cta-panel { padding: 28px; flex-direction: column; gap: 20px; text-align: center; }
  .bl-cta-text p { max-width: none; }
  .bl-footer { padding-top: 40px; }
  .bl-footer-subscribe form { flex-direction: column; }
  .bl-footer-subscribe .bl-btn { width: 100%; }
}
@media screen and (min-width: 640px) and (max-width: 1024px) {
  .bl-nav-link { font-size: .8125rem; }
  .bl-param-specs .spec { flex-direction: column; gap: 2px; }
  .bl-param-specs .spec strong { text-align: left; }
}