/* roulang page: index */
:root{
  --bg-ink:#0B0E14;
  --bg-surface:#131824;
  --bg-elevated:#1A2130;
  --bg-deep:#080B10;
  --primary-neon:#00E5A0;
  --secondary-neon:#B026FF;
  --text-high:#F2F5F8;
  --text-mid:#A0AABA;
  --text-low:#78828F;
  --line:rgba(255,255,255,.08);
  --line-bright:rgba(0,229,160,.35);
  --gradient-cta:linear-gradient(135deg,#00E5A0 0%,#8B5CF6 100%);
  --radius-card:14px;
  --radius-btn:8px;
  --radius-pill:999px;
  --font-cn:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
  --shadow-primary:0 14px 42px rgba(0,229,160,.18);
  --transition:all .18s ease;
  --section-space:clamp(76px,10vw,124px);
}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-ink);
  color:var(--text-high);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  padding-top:72px;
  overflow-x:hidden;
}
*,*::before,*::after{box-sizing:border-box}
ul,ol,dl,dd,figure{list-style:none;margin:0;padding:0}
blockquote{margin:0}
img{max-width:100%;height:auto;display:block;border:0}
a{color:var(--text-high);text-decoration:none;transition:color .18s ease,border-color .18s ease,background .18s ease,opacity .18s ease}
a:hover{color:var(--primary-neon)}
a:focus{outline:none}
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--primary-neon);
  outline-offset:3px;
  border-radius:6px;
}
::selection{background:rgba(0,229,160,.25);color:#fff}
.grid-container{max-width:1200px;width:100%;padding-left:20px;padding-right:20px;margin-right:auto;margin-left:auto}
.grid-container.full{max-width:100%}

/* Header */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:220;
  height:72px;
  background:rgba(11,14,20,.92);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-top:3px solid var(--primary-neon);
  border-bottom:1px solid rgba(255,255,255,.06);
  box-shadow:0 10px 36px rgba(0,0,0,.28);
}
.site-header::before{
  content:"";
  position:absolute;
  left:0;right:0;top:-3px;
  height:3px;
  background:linear-gradient(90deg,var(--primary-neon),var(--secondary-neon));
  filter:blur(1px);
  opacity:.55;
  pointer-events:none;
}
.site-header .grid-container{height:100%;max-width:1280px}
.header-inner{
  height:100%;
  display:flex;
  align-items:center;
  gap:28px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:var(--text-high);
  font-size:18px;
  font-weight:800;
  letter-spacing:.02em;
}
.brand:hover{color:var(--text-high)}
.brand-mark{
  position:relative;
  width:14px;
  height:14px;
  flex:0 0 auto;
  border-radius:50%;
  background:var(--primary-neon);
  box-shadow:0 0 0 5px rgba(0,229,160,.12),0 0 16px rgba(0,229,160,.55);
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset:-5px;
  border-radius:50%;
  border:1px solid rgba(176,38,255,.65);
}
.brand-name{
  white-space:nowrap;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:30px;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:24px 0;
  font-size:15px;
  font-weight:600;
  color:var(--text-mid);
  letter-spacing:.01em;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:18px;
  width:0;
  height:2px;
  border-radius:2px;
  background:var(--primary-neon);
  box-shadow:0 0 10px rgba(0,229,160,.8);
  transition:width .25s ease;
}
.nav-link.active,
.nav-link:hover{
  color:var(--primary-neon);
  text-shadow:0 0 12px rgba(0,229,160,.4);
}
.nav-link.active::after{
  width:100%;
}
.nav-link:hover::after{
  width:100%;
}
.header-actions{
  display:flex;
  align-items:center;
  gap:14px;
  margin-left:auto;
}
.header-cta-hint{
  font-size:13px;
  color:var(--text-low);
  white-space:nowrap;
}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  margin-left:auto;
  padding:0;
  background:transparent;
  border:1px solid transparent;
  border-radius:8px;
  cursor:pointer;
  position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  display:block;
  width:20px;
  height:2px;
  border-radius:2px;
  background:var(--text-high);
  position:absolute;
  left:11px;
  transition:transform .25s ease,opacity .25s ease;
}
.nav-toggle span{top:21px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-open .nav-toggle span{
  transform:rotate(45deg);
}
.nav-open .nav-toggle span::before{
  opacity:0;
  transform:translateX(-6px);
}
.nav-open .nav-toggle span::after{
  transform:rotate(90deg) translateX(-6px);
}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.55em;
  border:0;
  border-radius:var(--radius-btn);
  font-family:var(--font-cn);
  font-size:15px;
  font-weight:700;
  line-height:1;
  padding:14px 22px;
  cursor:pointer;
  white-space:nowrap;
  text-align:center;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease,color .18s ease,background .18s ease;
}
.btn:hover{
  transform:translateY(-2px);
}
.btn-primary{
  background:var(--gradient-cta);
  color:#071016;
  box-shadow:0 8px 26px rgba(0,229,160,.16);
}
.btn-primary:hover{
  color:#071016;
  box-shadow:0 12px 44px rgba(0,229,160,.3);
}
.btn-ghost{
  background:rgba(255,255,255,.02);
  border:1px solid var(--line);
  color:var(--text-high);
}
.btn-ghost:hover{
  border-color:var(--primary-neon);
  color:var(--primary-neon);
  background:rgba(0,229,160,.05);
}
.btn-lg{
  padding:17px 28px;
  font-size:16px;
}
.btn-compact{
  padding:11px 18px;
  font-size:14px;
  border-radius:8px;
}
.btn-action-pulse{
  animation:pulseGlow 2.6s ease-in-out infinite;
}
@keyframes pulseGlow{
  0%{box-shadow:0 0 0 0 rgba(0,229,160,.35)}
  70%{box-shadow:0 0 34px 0 rgba(0,229,160,.6)}
  100%{box-shadow:0 0 0 0 rgba(0,229,160,.35)}
}

/* Section helpers */
.section{
  padding-top:var(--section-space);
  padding-bottom:var(--section-space);
  position:relative;
}
.section-surface{
  background:var(--bg-surface);
}
.section-elevated{
  background:var(--bg-elevated);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--primary-neon);
  text-transform:uppercase;
}
.eyebrow::before{
  content:"";
  width:18px;
  height:2px;
  background:var(--secondary-neon);
  border-radius:2px;
}
.section-head{
  max-width:760px;
  margin-bottom:clamp(32px,5vw,52px);
}
.section-head.center{
  margin-left:auto;
  margin-right:auto;
  text-align:center;
}
.section-head.center .eyebrow{
  justify-content:center;
}
.section-head.center .eyebrow::before{
  display:none;
}
.section-title{
  margin:10px 0 0;
  font-size:clamp(26px,4vw,36px);
  font-weight:800;
  line-height:1.25;
  letter-spacing:-.015em;
  color:var(--text-high);
}
.section-lead{
  margin:16px 0 0;
  font-size:16px;
  line-height:1.85;
  color:var(--text-mid);
}
.more-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:700;
  color:var(--primary-neon);
}
.more-link i{
  transition:transform .18s ease;
}
.more-link:hover i{
  transform:translateX(4px);
}

/* Hero */
.hero{
  position:relative;
  display:flex;
  align-items:center;
  min-height:calc(100vh - 60px);
  padding:clamp(90px,12vw,150px) 0 92px;
  overflow:hidden;
  isolation:isolate;
  background-image:linear-gradient(108deg,rgba(11,14,20,.94) 10%,rgba(11,14,20,.72) 55%,rgba(176,38,255,.24) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";
  position:absolute;
  z-index:-1;
  width:560px;
  height:560px;
  left:-160px;
  top:-80px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(0,229,160,.16),transparent 68%);
}
.hero::after{
  content:"";
  position:absolute;
  z-index:-1;
  width:460px;
  height:460px;
  right:-180px;
  bottom:-90px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(176,38,255,.16),transparent 68%);
}
.hero-inner{
  position:relative;
  z-index:2;
  max-width:940px;
  margin:0 auto;
  text-align:left;
}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:7px 16px;
  border:1px solid rgba(0,229,160,.25);
  border-radius:999px;
  background:rgba(0,229,160,.06);
  color:var(--primary-neon);
  font-size:13px;
  font-weight:700;
  letter-spacing:.04em;
}
.hero-tag i{
  font-size:12px;
}
.hero-title{
  margin:24px 0 0;
  font-size:clamp(30px,4.7vw,52px);
  line-height:1.25;
  font-weight:800;
  letter-spacing:-.015em;
  color:var(--text-high);
}
.hero-rule{
  width:80px;
  height:4px;
  margin:26px 0 0;
  border-radius:4px;
  background:linear-gradient(90deg,var(--primary-neon),var(--secondary-neon));
}
.hero-lead{
  max-width:720px;
  margin:20px 0 0;
  font-size:clamp(17px,1.5vw,19px);
  line-height:1.85;
  color:var(--text-mid);
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:34px;
}
.hero-mini{
  display:flex;
  flex-wrap:wrap;
  gap:10px 22px;
  margin-top:44px;
  color:var(--text-mid);
  font-size:14px;
}
.hero-mini span{
  display:inline-flex;
  align-items:center;
  gap:7px;
}
.hero-mini i{
  color:var(--primary-neon);
}
.scroll-cue{
  position:absolute;
  left:50%;
  bottom:24px;
  transform:translateX(-50%);
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  gap:8px;
  color:var(--text-low);
  font-size:12px;
  letter-spacing:.08em;
  transition:color .18s ease;
  z-index:4;
}
.scroll-cue:hover{
  color:var(--primary-neon);
}
.scroll-line{
  display:block;
  width:1px;
  height:46px;
  background:linear-gradient(to bottom,var(--primary-neon),transparent);
  position:relative;
  overflow:hidden;
  animation:scrollFade 2s ease-in-out infinite;
}
@keyframes scrollFade{
  0%{opacity:.25;transform:translateY(-8px)}
  50%{opacity:1;transform:translateY(0)}
  100%{opacity:.25;transform:translateY(8px)}
}

/* Trust bar */
.trust-bar{
  position:relative;
  z-index:4;
  padding:30px 0;
  background:var(--bg-elevated);
  border-bottom:1px solid var(--line);
}
.trust-row{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:0;
}
.trust-item{
  display:flex;
  align-items:center;
  gap:12px;
  padding:6px 18px;
  border-left:1px solid var(--line);
}
.trust-item:first-child{
  border-left:0;
  padding-left:0;
}
.trust-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px;
  height:38px;
  border-radius:12px;
  background:rgba(0,229,160,.08);
  border:1px solid rgba(0,229,160,.16);
  color:var(--primary-neon);
  font-size:16px;
  flex:0 0 auto;
}
.trust-text strong{
  display:block;
  font-size:14px;
  font-weight:700;
  color:var(--text-high);
  line-height:1.3;
}
.trust-text span{
  display:block;
  margin-top:3px;
  font-size:12px;
  color:var(--text-low);
}

/* Feature cards */
.feature-card{
  position:relative;
  height:100%;
  padding:clamp(24px,3vw,36px);
  background:var(--bg-surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
  overflow:hidden;
  display:flex;
  flex-direction:column;
}
.feature-card::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:100%;
  height:2px;
  background:linear-gradient(90deg,var(--secondary-neon),transparent);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .3s ease;
}
.feature-card:hover{
  transform:translateY(-4px);
  border-color:rgba(0,229,160,.4);
  box-shadow:0 20px 46px rgba(0,0,0,.22);
}
.feature-card:hover::after{
  transform:scaleX(1);
}
.feature-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:56px;
  height:56px;
  border-radius:16px;
  background:rgba(0,229,160,.08);
  border:1px solid rgba(0,229,160,.18);
  color:var(--primary-neon);
  font-size:24px;
  margin-bottom:22px;
}
.feature-card h3{
  margin:0 0 12px;
  font-size:20px;
  font-weight:800;
  line-height:1.35;
  letter-spacing:-.01em;
}
.feature-card p{
  margin:0;
  font-size:15px;
  line-height:1.8;
  color:var(--text-mid);
  flex:1;
}
.feature-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:22px;
  color:var(--text-low);
  font-size:13px;
  font-weight:600;
  transition:color .18s ease;
}
.feature-tag i{
  color:var(--secondary-neon);
  font-size:12px;
  transition:transform .18s ease;
}
.feature-card:hover .feature-tag{
  color:var(--primary-neon);
}
.feature-card:hover .feature-tag i{
  transform:translateX(4px);
}

/* Scenes */
.scene-block{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  align-items:center;
  gap:clamp(28px,4vw,66px);
  margin-top:clamp(48px,7vw,76px);
}
.scene-media{
  grid-column:span 6;
  position:relative;
}
.scene-media--text-right{
  grid-column:span 6;
  order:2;
}
.scene-copy{
  grid-column:span 6;
}
.scene-copy--text-left{
  order:1;
}
.scene-media-frame{
  position:relative;
  overflow:hidden;
  border-radius:20px;
  border:1px solid var(--line);
  background:var(--bg-elevated);
}
.scene-media-frame img{
  width:100%;
  height:380px;
  object-fit:cover;
  object-position:center;
  transform:scale(1.001);
  transition:transform .5s cubic-bezier(.23,1,.32,1);
}
.scene-media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(150deg,rgba(11,14,20,.25) 0%,transparent 52%,rgba(176,38,255,.14) 100%);
}
.scene-media:hover .scene-media-frame img{
  transform:scale(1.04);
}
.scene-deco{
  position:absolute;
  width:150px;
  height:150px;
  right:-28px;
  top:-28px;
  border-radius:24px;
  background:var(--bg-elevated);
  border:1px solid var(--line);
  z-index:-1;
}
.scene-badge{
  position:absolute;
  left:18px;
  bottom:18px;
  z-index:3;
  display:flex;
  align-items:center;
  gap:10px;
  padding:12px 16px;
  border-radius:12px;
  background:rgba(11,14,20,.86);
  border:1px solid rgba(255,255,255,.08);
  backdrop-filter:blur(8px);
  box-shadow:0 12px 30px rgba(0,0,0,.3);
}
.scene-badge i{
  color:var(--primary-neon);
  font-size:22px;
}
.scene-badge strong{
  display:block;
  color:var(--text-high);
  font-size:14px;
  line-height:1.3;
}
.scene-badge span{
  display:block;
  color:var(--text-low);
  font-size:12px;
}
.scene-copy h3{
  margin:0 0 16px;
  font-size:clamp(22px,2.8vw,28px);
  line-height:1.3;
  font-weight:800;
  letter-spacing:-.01em;
}
.scene-copy p{
  margin:0 0 16px;
  color:var(--text-mid);
  font-size:16px;
  line-height:1.85;
}
.scene-copy p + p{
  margin-top:12px;
}
.tag-list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:22px;
}
.micro-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 13px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(255,255,255,.02);
  color:var(--text-mid);
  font-size:12px;
  font-weight:600;
  transition:color .18s ease,border-color .18s ease,background .18s ease;
}
.micro-tag i{
  color:var(--secondary-neon);
  font-size:11px;
}
.micro-tag:hover{
  color:var(--primary-neon);
  border-color:rgba(0,229,160,.35);
  background:rgba(0,229,160,.05);
}

/* Latest / CMS */
.news-card{
  position:relative;
  height:100%;
  display:flex;
  flex-direction:column;
  padding:24px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--bg-surface);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.news-card:hover{
  transform:translateY(-4px);
  border-color:rgba(0,229,160,.42);
  box-shadow:0 18px 44px rgba(0,0,0,.22);
}
.news-cell--accent .news-card{
  background:var(--bg-elevated);
  border-left:3px solid var(--primary-neon);
}
.news-topline{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  margin-bottom:14px;
}
.news-label{
  display:inline-flex;
  align-items:center;
  padding:5px 11px;
  border-radius:999px;
  background:rgba(0,229,160,.08);
  border:1px solid rgba(0,229,160,.18);
  color:var(--primary-neon);
  font-size:12px;
  font-weight:700;
}
.news-date{
  font-size:12px;
  color:var(--text-low);
  white-space:nowrap;
}
.news-card h3{
  margin:0 0 12px;
  font-size:17px;
  font-weight:800;
  line-height:1.5;
  letter-spacing:-.01em;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-card h3 a{color:var(--text-high)}
.news-card h3 a:hover{color:var(--primary-neon)}
.news-card p{
  margin:0 0 16px;
  font-size:14px;
  line-height:1.75;
  color:var(--text-mid);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  flex:1;
}
.news-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-top:auto;
  color:var(--text-low);
  font-size:13px;
  font-weight:700;
}
.news-more i{
  transition:transform .18s ease;
}
.news-card:hover .news-more{
  color:var(--primary-neon);
}
.news-card:hover .news-more i{
  transform:translateX(4px);
}
.news-empty{
  padding:56px 20px;
  text-align:center;
  border:1px dashed var(--line);
  border-radius:var(--radius-card);
  background:rgba(255,255,255,.01);
}
.news-empty i{
  display:inline-flex !important;
  margin-bottom:14px;
  color:var(--primary-neon);
  font-size:26px;
}
.news-empty p{
  margin:0;
  color:var(--text-mid);
}

/* Testimonials */
.quote-card{
  height:100%;
  padding:clamp(24px,3vw,32px);
  background:var(--bg-surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  transition:border-color .2s ease,transform .2s ease;
}
.quote-card:hover{
  border-color:rgba(0,229,160,.3);
}
.quote-card--lead{
  background:var(--bg-elevated);
  border-left:3px solid var(--secondary-neon);
}
.quote-icon{
  margin-bottom:16px;
  color:var(--primary-neon);
  font-size:22px;
  opacity:.5;
}
.quote-text{
  margin:0;
  font-size:15px;
  line-height:1.8;
  color:var(--text-mid);
}
.quote-person{
  display:flex;
  align-items:center;
  gap:12px;
  margin-top:20px;
  padding-top:16px;
  border-top:1px solid var(--line);
}
.avatar{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:46px;
  height:46px;
  border-radius:50%;
  background:linear-gradient(135deg,rgba(0,229,160,.25),rgba(176,38,255,.25));
  color:var(--text-high);
  font-size:15px;
  font-weight:800;
  border:1px solid rgba(0,229,160,.25);
}
.quote-person strong{
  display:block;
  color:var(--text-high);
  font-size:15px;
  font-weight:700;
  line-height:1.3;
}
.quote-person span{
  color:var(--text-low);
  font-size:13px;
}

/* FAQ */
.faq-layout{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:clamp(28px,5vw,64px);
}
.faq-intro{
  grid-column:span 4;
}
.faq-intro p{
  margin-top:16px;
  color:var(--text-mid);
}
.faq-intro .helper-links{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:22px;
}
.faq-list-wrap{
  grid-column:span 8;
}
.faq-accordion{
  border-top:1px solid var(--line);
}
.faq-accordion .accordion-item{
  background:transparent;
  border-bottom:1px solid var(--line);
}
.faq-accordion .accordion-title{
  border:0;
  padding:20px 38px 20px 0;
  background:transparent;
  color:var(--text-high);
  font-size:17px;
  font-weight:700;
  line-height:1.55;
  position:relative;
  transition:color .18s ease;
}
.faq-accordion .accordion-title:hover,
.faq-accordion .accordion-item.is-active .accordion-title{
  color:var(--primary-neon);
  background:transparent;
}
.faq-accordion .accordion-title::before{
  content:"";
  position:absolute;
  left:0;
  top:16px;
  bottom:16px;
  width:3px;
  border-radius:3px;
  background:transparent;
  transition:background .18s ease;
}
.faq-accordion .accordion-item.is-active .accordion-title::before{
  background:var(--primary-neon);
}
.faq-accordion .accordion-title::after{
  content:"+";
  position:absolute;
  right:6px;
  top:50%;
  transform:translateY(-50%);
  color:var(--text-mid);
  font-size:24px;
  font-weight:300;
  transition:color .18s ease,transform .18s ease;
}
.faq-accordion .accordion-item.is-active .accordion-title::after{
  transform:translateY(-50%) rotate(45deg);
  color:var(--primary-neon);
}
.faq-accordion .accordion-content{
  background:transparent;
  border:0;
  color:var(--text-mid);
  font-size:15px;
  line-height:1.85;
}
.faq-accordion .accordion-content p{
  margin:0;
  padding:0 0 22px;
}

/* Final CTA */
.cta-final{
  position:relative;
  overflow:hidden;
  padding:clamp(72px,9vw,116px) 0;
  text-align:center;
  border-top:1px solid var(--line);
  background-image:linear-gradient(rgba(11,14,20,.92),rgba(11,14,20,.88)),url('/assets/images/coverpic/cover-9.png');
  background-size:cover;
  background-position:center;
}
.cta-final::before{
  content:"";
  position:absolute;
  z-index:0;
  width:420px;
  height:420px;
  left:50%;
  top:50%;
  transform:translate(-50%,-50%);
  background:radial-gradient(circle,rgba(0,229,160,.14),rgba(176,38,255,.08) 58%,transparent 70%);
  pointer-events:none;
}
.cta-final .grid-container{
  position:relative;
  z-index:1;
}
.cta-final h2{
  font-size:clamp(27px,4vw,42px);
  font-weight:800;
  line-height:1.3;
  letter-spacing:-.015em;
  margin:0;
}
.cta-final p{
  max-width:560px;
  margin:16px auto 28px;
  font-size:16px;
  color:var(--text-mid);
}

/* Sticky bottom CTA */
.sticky-cta{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:180;
  background:rgba(11,14,20,.92);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-top:1px solid rgba(255,255,255,.08);
  transform:translateY(110%);
  opacity:0;
  pointer-events:none;
  transition:transform .3s ease,opacity .3s ease;
  box-shadow:0 -14px 40px rgba(0,0,0,.2);
}
.sticky-cta.is-visible{
  transform:translateY(0);
  opacity:1;
  pointer-events:auto;
}
.sticky-inner{
  min-height:76px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.sticky-copy strong{
  display:block;
  font-size:15px;
  line-height:1.35;
  color:var(--text-high);
}
.sticky-copy span{
  display:block;
  margin-top:2px;
  font-size:12px;
  color:var(--text-low);
}

/* Footer */
.site-footer{
  background:var(--bg-ink);
  border-top:1px solid rgba(0,229,160,.35);
  padding-top:clamp(48px,7vw,76px);
}
.footer-main{
  padding-bottom:40px;
}
.footer-brand-cell{
  padding-right:40px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  color:var(--text-high);
  font-size:20px;
  font-weight:800;
}
.footer-brand:hover{color:var(--text-high)}
.footer-desc{
  margin:18px 0 20px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-mid);
  max-width:360px;
}
.footer-link-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:6px;
  color:var(--primary-neon);
  font-size:14px;
  font-weight:700;
}
.footer-link-cta i{
  transition:transform .18s ease;
}
.footer-link-cta:hover i{
  transform:translateX(4px);
}
.footer-links-row{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.footer-col h4{
  margin:0 0 14px;
  padding-left:10px;
  border-left:3px solid var(--primary-neon);
  font-size:14px;
  font-weight:800;
  letter-spacing:.04em;
  color:var(--text-high);
}
.footer-col ul li{
  margin-bottom:10px;
}
.footer-col ul a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--text-mid);
  font-size:14px;
  transition:color .18s ease,padding-left .18s ease;
}
.footer-col ul a::before{
  content:"·";
  color:var(--secondary-neon);
}
.footer-col ul a:hover{
  color:var(--primary-neon);
  padding-left:2px;
}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px;
  color:var(--text-low);
  font-size:13px;
}
.footer-bottom a{
  color:var(--text-low);
}
.footer-bottom a:hover{
  color:var(--primary-neon);
}

@media (max-width:1024px){
  .trust-row{
    grid-template-columns:repeat(3,1fr);
    row-gap:20px;
  }
  .trust-item:nth-child(3){
    border-left:0;
    padding-left:0;
  }
  .trust-item:nth-child(1),
  .trust-item:nth-child(4){
    border-left:0;
    padding-left:0;
  }
}
@media (max-width:900px){
  .main-nav{
    gap:22px;
  }
  .nav-link{
    font-size:14px;
  }
  .header-inner{
    gap:16px;
  }
}
@media (max-width:800px){
  body{
    padding-top:60px;
  }
  .site-header{
    height:60px;
  }
  .nav-toggle{
    display:block;
  }
  .main-nav{
    position:fixed;
    top:60px;
    left:0;
    right:0;
    bottom:auto;
    height:auto;
    max-height:calc(100vh - 60px);
    overflow:auto;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:16px 20px 24px;
    background:var(--bg-elevated);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    box-shadow:0 24px 56px rgba(0,0,0,.42);
    transform:translateY(-18px);
    opacity:0;
    pointer-events:none;
    transition:transform .22s ease,opacity .22s ease;
    z-index:210;
  }
  .nav-open .main-nav{
    transform:translateY(0);
    opacity:1;
    pointer-events:auto;
  }
  .main-nav .nav-link{
    display:block;
    padding:16px 0;
    border-bottom:1px solid var(--line);
    color:var(--text-high);
    font-size:16px;
    font-weight:700;
  }
  .main-nav .nav-link.active{
    color:var(--primary-neon);
  }
  .main-nav .nav-link::after{
    display:none;
  }
  .header-cta{
    display:none;
  }
}
@media (max-width:700px){
  body{
    font-size:15px;
  }
  .hero{
    min-height:auto;
    padding:92px 0 64px;
  }
  .hero-inner{
    text-align:left;
  }
  .scroll-cue{
    display:none;
  }
  .trust-row{
    grid-template-columns:repeat(2,1fr);
    row-gap:18px;
  }
  .trust-item{
    border-left:0;
    padding-left:0;
  }
  .trust-item:nth-child(odd){
    border-right:1px solid var(--line);
  }
}
@media (max-width:640px){
  .hero-actions .btn{
    width:100%;
  }
  .scene-block{
    display:block;
  }
  .scene-media,.scene-media--text-right,.scene-copy,.scene-copy--text-left{
    order:0;
  }
  .scene-copy{
    margin-top:8px;
  }
  .scene-media{
    margin-bottom:24px;
  }
  .scene-media-frame img{
    height:250px;
  }
  .faq-layout{
    display:block;
  }
  .faq-intro{
    margin-bottom:24px;
  }
  .footer-links-row{
    grid-template-columns:1fr;
    gap:28px;
    margin-top:36px;
  }
  .footer-main .footer-brand-cell{
    padding-right:0;
  }
  .footer-bottom{
    flex-direction:column;
    justify-content:flex-start;
  }
  .sticky-inner{
    min-height:68px;
  }
  .sticky-copy span{
    display:none;
  }
}
@media (prefers-reduced-motion:reduce){
  html{
    scroll-behavior:auto;
  }
  *,*::before,*::after{
    animation-duration:.001s !important;
    animation-iteration-count:1 !important;
    transition-duration:.001s !important;
  }
}

/* roulang page: category1 */
:root{
      --bg-ink:#0B0E14;
      --bg-surface:#131824;
      --bg-elevated:#1A2130;
      --primary-neon:#00E5A0;
      --secondary-neon:#B026FF;
      --text-high:#F2F5F8;
      --text-mid:#A0AABA;
      --text-low:#5B6472;
      --line:rgba(255,255,255,0.08);
      --gradient-cta:linear-gradient(135deg,#00E5A0,#8B5CF6);
      --radius-card:14px;
      --radius-btn:8px;
      --radius-tag:999px;
      --container-max:1200px;
      --space-section:clamp(72px,10vw,128px);
    }

    *,*::before,*::after{box-sizing:border-box;}
    html,body{margin:0;padding:0;}
    body{
      font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Segoe UI",system-ui,-apple-system,sans-serif;
      background:var(--bg-ink);
      color:var(--text-high);
      font-size:16px;
      line-height:1.75;
      -webkit-font-smoothing:antialiased;
    }
    img{max-width:100%;display:block;}
    a{color:var(--primary-neon);text-decoration:none;transition:color .18s ease;}
    a:hover{color:var(--text-high);}
    ul,ol{padding:0;margin:0;list-style:none;}
    button,input,textarea{font-family:inherit;}

    .grid-container{max-width:var(--container-max);}

    .site-header{
      position:fixed;
      top:0;left:0;right:0;
      z-index:100;
      background:rgba(11,14,20,0.92);
      backdrop-filter:blur(16px);
      -webkit-backdrop-filter:blur(16px);
      border-top:3px solid var(--primary-neon);
      border-bottom:1px solid transparent;
      height:72px;
    }
    .site-header .header-inner{
      display:flex;align-items:center;justify-content:space-between;
      height:72px;column-gap:24px;
    }
    .brand{
      display:inline-flex;align-items:center;gap:10px;
      font-weight:800;font-size:24px;letter-spacing:-0.02em;
      color:var(--text-high);white-space:nowrap;
    }
    .brand:hover{color:var(--text-high);}
    .brand-mark{
      position:relative;width:22px;height:22px;flex:0 0 auto;
      background:var(--gradient-cta);
      border-radius:50%;
      box-shadow:0 0 18px rgba(0,229,160,.4);
    }
    .brand-mark::after{
      content:"";position:absolute;inset:6px;
      background:var(--bg-ink);border-radius:50%;
    }
    .brand-name{line-height:1.2;}

    .main-nav{display:flex;align-items:center;gap:32px;}
    .nav-link{
      position:relative;
      color:var(--text-mid);
      font-size:15px;font-weight:500;
      padding:8px 0;line-height:1.2;
      transition:color .18s ease;
    }
    .nav-link::after{
      content:"";position:absolute;left:0;bottom:0;
      width:0;height:2px;
      background:var(--primary-neon);
      transition:width .25s ease;
    }
    .nav-link:hover{color:var(--text-high);}
    .nav-link:hover::after{width:100%;}
    .nav-link.active{
      color:var(--primary-neon);
      text-shadow:0 0 12px rgba(0,229,160,.5);
    }
    .nav-link.active::after{width:100%;}

    .header-actions{display:flex;align-items:center;gap:12px;}

    .btn{
      display:inline-flex;align-items:center;justify-content:center;
      gap:8px;border-radius:var(--radius-btn);
      font-weight:700;line-height:1.2;
      border:1px solid transparent;cursor:pointer;
      transition:transform .18s ease,box-shadow .18s ease,color .18s ease,background .18s ease,border-color .18s ease;
    }
    .btn-primary{
      background:var(--gradient-cta);
      color:#0B0E14;font-size:15px;
      padding:12px 24px;
      box-shadow:0 0 24px rgba(0,229,160,.22);
    }
    .btn-primary:hover{
      color:#0B0E14;
      transform:translateY(-2px);
      box-shadow:0 0 36px rgba(0,229,160,.5);
    }
    .btn-compact{padding:10px 20px;font-size:14px;}
    .btn-ghost{
      background:transparent;
      border-color:var(--line);
      color:var(--text-high);
      padding:12px 24px;
      font-size:15px;
    }
    .btn-ghost:hover{
      border-color:var(--primary-neon);
      color:var(--primary-neon);
      transform:translateY(-2px);
    }
    .btn-light{
      background:rgba(255,255,255,.08);
      border-color:var(--line);
      color:var(--text-high);
      padding:11px 20px;
      font-size:14px;
    }
    .btn-light:hover{color:var(--primary-neon);border-color:var(--primary-neon);transform:translateY(-2px);}

    .nav-toggle{
      display:none;
      width:44px;height:44px;background:transparent;border:1px solid var(--line);
      border-radius:var(--radius-btn);position:relative;cursor:pointer;
    }
    .nav-toggle span,
    .nav-toggle span::before,
    .nav-toggle span::after{
      content:"";position:absolute;left:11px;right:11px;height:2px;
      background:var(--text-high);transition:all .2s ease;
    }
    .nav-toggle span{top:50%;transform:translateY(-50%);}
    .nav-toggle span::before{top:-7px;}
    .nav-toggle span::after{top:7px;}
    .nav-toggle.open span{background:transparent;}
    .nav-toggle.open span::before{top:0;transform:rotate(45deg);background:var(--primary-neon);}
    .nav-toggle.open span::after{top:0;transform:rotate(-45deg);background:var(--primary-neon);}

    .cat-hero{
      position:relative;
      padding:150px 0 56px;
      background:linear-gradient(rgba(11,14,20,.74),rgba(11,14,20,.92)),
        url('/assets/images/backpic/back-2.png') center/cover no-repeat;
      border-bottom:1px solid var(--line);
    }
    .breadcrumb{
      font-size:13px;color:var(--text-low);
      margin-bottom:24px;display:flex;flex-wrap:wrap;gap:6px;
    }
    .breadcrumb a{color:var(--text-low);}
    .breadcrumb a:hover{color:var(--primary-neon);}
    .breadcrumb .sep{opacity:.45;margin:0 3px;}
    .breadcrumb .current{color:var(--text-mid);}

    .cat-hero h1{
      font-size:clamp(32px,5vw,52px);
      font-weight:800;letter-spacing:-0.02em;
      line-height:1.25;margin:0 0 16px;
    }
    .cat-hero .lead{
      font-size:16px;color:var(--text-mid);
      max-width:900px;margin:0;
    }
    .cat-title-line{
      display:block;width:80px;height:4px;
      background:var(--gradient-cta);border-radius:99px;
      margin:12px 0 20px;
    }
    .topic-tags{
      display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;
    }
    .tag{
      display:inline-flex;align-items:center;gap:6px;
      padding:6px 14px;border-radius:var(--radius-tag);
      background:rgba(255,255,255,.05);
      border:1px solid var(--line);
      color:var(--text-mid);
      font-size:13px;cursor:default;
      transition:all .18s ease;
    }
    .tag i{color:var(--primary-neon);font-size:11px;}
    .tag:hover{
      border-color:var(--secondary-neon);
      color:var(--text-high);
    }

    .trust-strip{
      padding:28px 0 4px;
    }
    .trust-item{
      border-left:1px solid var(--line);
      padding:12px 26px;
    }
    .trust-item:first-child{border-left:none;padding-left:0;}
    .trust-item .num{
      font-size:22px;font-weight:800;color:var(--primary-neon);
      line-height:1.2;display:flex;align-items:center;gap:6px;
    }
    .trust-item .num small{font-size:12px;font-weight:500;color:var(--text-low);}
    .trust-item .label{font-size:13px;color:var(--text-low);margin-top:4px;}

    .section{padding:var(--space-section) 0;}
    .section-head{
      margin-bottom:44px;
    }
    .section-head .eyebrow{
      color:var(--secondary-neon);font-size:14px;font-weight:700;
      margin-bottom:6px;letter-spacing:.05em;
    }
    .section-head h2{
      font-size:clamp(26px,3.6vw,36px);
      font-weight:800;letter-spacing:-0.02em;
      line-height:1.3;margin:0 0 10px;
    }
    .section-head .sub{
      font-size:15px;color:var(--text-mid);
      max-width:720px;margin:0;
    }
    .line-accent{
      display:inline-block;width:52px;height:3px;
      background:var(--gradient-cta);
      border-radius:99px;margin:2px 0 0;
    }

    .feature-card{
      background:var(--bg-surface);
      border:1px solid var(--line);
      border-radius:var(--radius-card);
      padding:28px 26px 24px;
      height:100%;
      display:flex;flex-direction:column;
      transition:transform .22s ease,border-color .22s ease;
      position:relative;overflow:hidden;
    }
    .feature-card::before{
      content:"";position:absolute;left:26px;right:26px;bottom:0;height:1px;
      background:var(--secondary-neon);
      transform:scaleX(0);transform-origin:left;
      transition:transform .3s ease;
    }
    .feature-card:hover{
      transform:translateY(-4px);
      border-color:rgba(0,229,160,.42);
    }
    .feature-card:hover::before{transform:scaleX(1);}
    .feature-card .icon-box{
      width:56px;height:56px;border-radius:12px;
      background:var(--bg-elevated);
      border:1px solid var(--line);
      display:flex;align-items:center;justify-content:center;
      color:var(--primary-neon);font-size:23px;
      margin-bottom:20px;
      transition:color .18s ease;
    }
    .feature-card h3{
      font-size:19px;font-weight:700;line-height:1.4;
      margin:0 0 12px;
    }
    .feature-card p{
      font-size:15px;color:var(--text-mid);margin:0 0 16px;
      flex-grow:1;
    }
    .feature-card .feature-tag{
      align-self:flex-start;
      font-size:12px;color:var(--text-low);
      border:1px solid var(--line);border-radius:99px;
      padding:3px 11px;
    }

    .steps-section{
      background:var(--bg-surface);
      border-top:1px solid var(--line);
      border-bottom:1px solid var(--line);
    }
    .step-item{
      position:relative;
      background:var(--bg-ink);
      border:1px solid var(--line);
      border-radius:var(--radius-card);
      padding:28px 24px;
      height:100%;
      transition:border-color .2s ease,transform .2s ease;
    }
    .step-item:hover{
      border-color:rgba(0,229,160,.35);
      transform:translateY(-3px);
    }
    .step-no{
      color:var(--primary-neon);font-size:13px;font-weight:800;
      letter-spacing:.1em;margin-bottom:12px;
    }
    .step-item h3{font-size:18px;font-weight:700;margin:0 0 10px;}
    .step-item p{font-size:14px;color:var(--text-mid);margin:0;}

    .split-scene{
      border:1px solid var(--line);
      border-radius:var(--radius-card);
      background:var(--bg-surface);
      padding:28px;
    }
    .split-scene .media{
      border-radius:var(--radius-card);
      overflow:hidden;position:relative;
    }
    .split-scene .media img{
      width:100%;height:300px;object-fit:cover;
      transition:transform .5s cubic-bezier(.23,1,.32,1);
    }
    .split-scene .media:hover img{transform:scale(1.04);}
    .split-scene .media::after{
      content:"";position:absolute;inset:0;
      background:linear-gradient(transparent 50%,rgba(11,14,20,.35));
      pointer-events:none;
    }
    .split-scene .scene-content h3{
      font-size:22px;font-weight:800;margin:0 0 14px;
    }
    .split-scene .scene-content p{
      color:var(--text-mid);font-size:15px;margin-bottom:14px;
    }
    .scene-notes{
      display:flex;flex-wrap:wrap;gap:10px;
      margin-top:14px;
    }
    .scene-notes span{
      font-size:13px;color:var(--text-mid);
      background:var(--bg-elevated);
      border-radius:var(--radius-tag);
      padding:5px 13px;
    }

    .quote-card{
      background:var(--bg-surface);
      border:1px solid var(--line);
      border-radius:var(--radius-card);
      padding:28px 24px 20px;
      height:100%;
      display:flex;flex-direction:column;
    }
    .quote-card:first-child{
      background:var(--bg-elevated);
    }
    .quote-card .q-icon{
      color:var(--primary-neon);font-size:26px;line-height:1;
      margin-bottom:16px;
    }
    .quote-card blockquote{
      border:none;padding:0;margin:0 0 18px;
      font-size:15px;color:var(--text-mid);
      line-height:1.8;flex-grow:1;
    }
    .quote-card .quote-author{
      border-top:1px solid var(--line);
      padding-top:14px;display:flex;align-items:center;gap:12px;
    }
    .quote-card .avatar{
      width:46px;height:46px;border-radius:50%;
      background:var(--gradient-cta);
      display:flex;align-items:center;justify-content:center;
      font-weight:800;color:#0B0E14;font-size:16px;
    }
    .quote-card .who strong{display:block;font-size:14px;}
    .quote-card .who span{font-size:13px;color:var(--text-low);}

    .faq-panel{}
    .faq-item{
      border-bottom:1px solid var(--line);
      padding:18px 0;
    }
    .faq-item:first-child{border-top:1px solid var(--line);}
    .faq-q{
      display:flex;align-items:center;justify-content:space-between;
      gap:20px;cursor:pointer;
      font-size:17px;font-weight:700;line-height:1.5;
      color:var(--text-high);
      transition:color .2s ease;
    }
    .faq-q i{
      color:var(--text-low);font-size:16px;
      transition:transform .2s ease,color .2s ease;
      flex:0 0 auto;
    }
    .faq-item.active .faq-q{color:var(--primary-neon);}
    .faq-item.active .faq-q i{
      transform:rotate(45deg);color:var(--primary-neon);
    }
    .faq-a{
      max-height:0;overflow:hidden;
      transition:max-height .32s ease,padding .32s ease;
      padding:0 20px 0 0;
    }
    .faq-item.active .faq-a{
      max-height:420px;padding-top:12px;
    }
    .faq-a p{margin:0;font-size:15px;color:var(--text-mid);}

    .cta-box{
      background:var(--bg-elevated);
      border:1px solid var(--line);
      border-radius:var(--radius-card);
      padding:48px 40px;
      text-align:center;
      position:relative;overflow:hidden;
    }
    .cta-box::after{
      content:"";position:absolute;inset:auto 0 0 0;height:2px;
      background:var(--gradient-cta);
    }
    .cta-box h2{
      font-size:clamp(24px,3.8vw,36px);
      font-weight:800;margin:0 0 12px;line-height:1.25;
    }
    .cta-box p{color:var(--text-mid);font-size:16px;max-width:520px;margin:0 auto 28px;}
    .cta-box .btn{min-width:180px;}

    .site-footer{
      background:var(--bg-ink);
      border-top:1px solid var(--primary-neon);
      padding:64px 0 0;
    }
    .footer-main{padding-bottom:36px;}
    .footer-brand-cell{padding-right:32px;}
    .footer-brand{
      display:inline-flex;align-items:center;gap:10px;
      font-size:24px;font-weight:800;color:var(--text-high);
    }
    .footer-desc{
      font-size:14px;color:var(--text-mid);
      margin:20px 0 18px;
      max-width:300px;
      line-height:1.7;
    }
    .footer-link-cta{
      display:inline-flex;align-items:center;gap:8px;
      font-size:14px;font-weight:700;color:var(--primary-neon);
      padding:9px 18px;border:1px solid rgba(0,229,160,.3);
      border-radius:var(--radius-btn);
      transition:background .2s ease,border-color .2s ease;
    }
    .footer-link-cta:hover{
      background:rgba(0,229,160,.1);
      border-color:var(--primary-neon);
    }
    .footer-links-row{
      display:flex;flex-wrap:wrap;
      gap:12px 24px;
    }
    .footer-col{flex:1 1 150px;}
    .footer-col h4{
      font-size:14px;font-weight:700;color:var(--text-high);
      padding-left:10px;border-left:3px solid var(--primary-neon);
      margin:0 0 16px;
      letter-spacing:.05em;
    }
    .footer-col ul li{margin-bottom:10px;}
    .footer-col ul a{
      font-size:14px;color:var(--text-mid);
      transition:color .18s ease;
    }
    .footer-col ul a:hover{color:var(--primary-neon);}
    .footer-bottom{
      border-top:1px solid var(--line);
      padding:20px 0;
      display:flex;flex-wrap:wrap;gap:6px 28px;justify-content:space-between;
    }
    .footer-bottom p{margin:0;font-size:13px;color:var(--text-low);}

    @media(max-width:900px){
      .main-nav{
        position:fixed;top:72px;left:0;right:0;
        flex-direction:column;gap:0;
        background:var(--bg-elevated);
        border-bottom:1px solid var(--line);
        display:none;
        padding:10px 24px 24px;
        box-shadow:0 24px 40px rgba(0,0,0,.3);
      }
      .main-nav.open{display:flex;}
      .nav-link{
        width:100%;padding:16px 0;
        border-bottom:1px solid var(--line);
        font-size:17px;
      }
      .nav-link::after{display:none;}
      .nav-toggle{display:inline-block;}
      .header-cta{display:none;}
      .site-header,.site-header .header-inner{height:60px;}
      .main-nav{top:60px;}
      .cat-hero{padding:120px 0 40px;}
      .trust-item{border-left:none;padding:10px 0;}
      .footer-links-row{gap:28px 12px;}
    }
    @media(max-width:520px){
      .brand-name{font-size:20px;}
      .brand-mark{width:18px;height:18px;}
      .brand-mark::after{inset:5px;}
      .cta-box{padding:40px 22px;}
      .split-scene .media img{height:220px;}
    }

/* roulang page: article */
:root{
  --bg-ink:#0B0E14;
  --bg-surface:#131824;
  --bg-elevated:#1A2130;
  --primary-neon:#00E5A0;
  --secondary-neon:#B026FF;
  --text-high:#F2F5F8;
  --text-mid:#A0AABA;
  --text-low:#5B6472;
  --line:rgba(255,255,255,0.08);
  --gradient-cta:linear-gradient(135deg,#00E5A0,#8B5CF6);
  --radius-card:14px;
  --radius-btn:8px;
  --font-stack:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",system-ui,sans-serif;
  --shadow-glow:0 0 40px rgba(0,229,160,0.35);
  --container-w:1200px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  font-family:var(--font-stack);
  background:var(--bg-ink);
  color:var(--text-high);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--primary-neon);text-decoration:none;transition:color .18s ease,border-color .18s ease,background .18s ease,transform .2s ease;}
a:hover{color:var(--primary-neon);text-decoration:none;}
button,input,textarea{font-family:inherit;}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:var(--radius-btn);
  font-weight:700;
  font-size:15px;
  line-height:1;
  min-height:46px;
  padding:0 24px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,color .18s ease,border-color .18s ease,background .18s ease;
  text-decoration:none;
}
.btn:focus-visible,.nav-link:focus-visible,.footer-col a:focus-visible,.channel-card:focus-visible{
  outline:2px solid var(--primary-neon);
  outline-offset:4px;
}
.btn-primary{
  background:var(--primary-neon);
  color:#08111E;
  box-shadow:0 0 20px rgba(0,229,160,0.18);
}
.btn-primary:hover{
  color:#04111C;
  transform:translateY(-2px);
  box-shadow:0 0 34px rgba(0,229,160,0.45);
}
.btn-ghost{
  background:transparent;
  color:var(--text-high);
  border-color:rgba(255,255,255,0.2);
}
.btn-ghost:hover{
  border-color:var(--primary-neon);
  color:var(--primary-neon);
}
.btn-compact{min-height:40px;padding:0 20px;font-size:14px;}
.site-header{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  z-index:1000;
  background:rgba(11,14,20,0.92);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-top:3px solid var(--primary-neon);
  box-shadow:0 8px 26px rgba(0,0,0,0.3);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:72px;
  flex-wrap:wrap;
  position:relative;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
  color:var(--text-high);
}
.brand-mark{
  position:relative;
  width:14px;
  height:14px;
  flex-shrink:0;
  display:inline-block;
}
.brand-mark::before,.brand-mark::after{
  content:"";
  position:absolute;
  border-radius:50%;
}
.brand-mark::before{
  width:14px;
  height:14px;
  background:rgba(0,229,160,0.25);
  border:2px solid var(--primary-neon);
  left:0;
  top:0;
}
.brand-mark::after{
  width:8px;
  height:8px;
  right:-5px;
  bottom:-7px;
  background:var(--secondary-neon);
  border:2px solid var(--bg-ink);
}
.brand-name{
  font-size:20px;
  font-weight:800;
  letter-spacing:-0.01em;
  white-space:nowrap;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:8px;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:10px 2px;
  font-size:14.5px;
  line-height:1.4;
  font-weight:500;
  color:var(--text-mid);
  transition:color .18s ease,text-shadow .18s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:2px;
  width:0;
  height:2px;
  background:var(--primary-neon);
  border-radius:99px;
  transition:width .24s cubic-bezier(.23,1,.32,1),box-shadow .24s ease;
}
.nav-link:hover{
  color:var(--text-high);
}
.nav-link:hover::after{
  width:100%;
  box-shadow:0 0 12px rgba(0,229,160,0.5);
}
.nav-link.active{
  color:var(--primary-neon);
  text-shadow:0 0 12px rgba(0,229,160,0.5);
}
.nav-link.active::after{
  width:100%;
}
.header-actions{
  display:flex;
  align-items:center;
  gap:14px;
  flex-shrink:0;
}
.nav-toggle{
  display:none;
  width:42px;
  height:42px;
  background:var(--bg-elevated);
  border:1px solid var(--line);
  border-radius:8px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";
  position:absolute;
  width:18px;
  height:2px;
  left:50%;
  margin-left:-9px;
  background:var(--primary-neon);
  border-radius:2px;
  transition:transform .2s ease,top .2s ease,opacity .2s ease;
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle.active span{background:transparent;}
.nav-toggle.active span::before{top:0;transform:rotate(45deg);}
.nav-toggle.active span::after{top:0;transform:rotate(-45deg);}

.article-hero{
  position:relative;
  padding:clamp(140px,12vw,180px) 0 clamp(48px,5vw,60px);
  overflow:hidden;
  background:var(--bg-ink);
}
.article-hero-bg{
  position:absolute;
  inset:0;
  background-size:cover;
  background-position:center;
  z-index:0;
}
.article-hero-bg::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(11,14,20,0.88) 0%,rgba(11,14,20,0.92) 60%,#0B0E14 100%);
}
.article-hero-content{
  position:relative;
  z-index:2;
  max-width:900px;
  margin:0 auto;
  padding:0 16px;
  text-align:center;
}
.page-breadcrumb{
  display:flex;
  justify-content:center;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:24px;
  font-size:13px;
  color:var(--text-mid);
}
.page-breadcrumb a{
  color:var(--text-mid);
  transition:color .18s ease;
}
.page-breadcrumb a:hover{color:var(--primary-neon);}
.page-breadcrumb .crumb-sep{color:var(--text-low);}
.page-breadcrumb .crumb-current{
  max-width:280px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  color:var(--text-low);
}
.article-hero h1{
  font-size:clamp(30px,4vw,50px);
  line-height:1.3;
  font-weight:800;
  letter-spacing:-0.02em;
  color:var(--text-high);
  margin:0 auto;
  max-width:820px;
}
.article-hero h1::after{
  content:"";
  display:block;
  width:64px;
  height:4px;
  border-radius:99px;
  background:var(--primary-neon);
  box-shadow:0 0 20px rgba(0,229,160,0.5);
  margin:20px auto 0;
}
.article-meta{
  display:flex;
  justify-content:center;
  align-items:center;
  flex-wrap:wrap;
  gap:18px;
  margin-top:26px;
  color:var(--text-mid);
  font-size:14px;
}
.article-meta .meta-item{
  display:inline-flex;
  align-items:center;
  gap:7px;
}
.article-meta i{color:var(--primary-neon);}

.article-body-wrap{
  position:relative;
  padding:clamp(40px,6vw,72px) 0;
  background:var(--bg-ink);
}
.article-body{
  max-width:780px;
  margin:0 auto;
  padding:0 20px;
  font-size:17px;
  line-height:1.95;
  color:var(--text-high);
  word-break:break-word;
}
.article-body p{
  margin-bottom:1.6em;
  color:var(--text-high);
}
.article-body h2{
  font-size:28px;
  font-weight:800;
  line-height:1.4;
  letter-spacing:-0.01em;
  margin:2.2em 0 1em;
  color:var(--text-high);
}
.article-body h3{
  font-size:22px;
  font-weight:700;
  line-height:1.45;
  margin:2em 0 0.9em;
  position:relative;
  padding-left:15px;
  color:var(--text-high);
}
.article-body h3::before{
  content:"";
  position:absolute;
  left:0;
  top:0.22em;
  width:3px;
  height:0.86em;
  border-radius:99px;
  background:var(--primary-neon);
  box-shadow:0 0 10px rgba(0,229,160,0.5);
}
.article-body h4{
  font-size:18px;
  font-weight:700;
  margin:1.8em 0 0.7em;
  color:var(--text-high);
}
.article-body a{
  color:var(--primary-neon);
  border-bottom:1px dotted rgba(0,229,160,0.5);
}
.article-body a:hover{border-bottom-color:var(--primary-neon);}
.article-body img{
  border-radius:12px;
  margin:28px auto;
  box-shadow:0 10px 34px rgba(0,0,0,0.3);
  border:1px solid rgba(255,255,255,0.05);
}
.article-body ul,.article-body ol{
  margin:1.4em 0 1.8em;
  padding-left:1.4em;
}
.article-body li{
  margin-bottom:0.55em;
  color:var(--text-mid);
}
.article-body blockquote{
  border-left:2px solid var(--secondary-neon);
  background:rgba(176,38,255,0.06);
  padding:18px 22px;
  border-radius:6px;
  margin:1.8em 0;
  color:var(--text-mid);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:24px 0;
  font-size:15px;
  background:var(--bg-surface);
  border-radius:10px;
  overflow:hidden;
}
.article-body th,.article-body td{
  border:1px solid var(--line);
  padding:12px 14px;
  text-align:left;
}
.article-body th{
  background:var(--bg-elevated);
  color:var(--text-high);
  font-weight:700;
}
.article-body code{
  background:var(--bg-elevated);
  border:1px solid var(--line);
  border-radius:5px;
  padding:2px 8px;
  font-family:"SFMono-Regular",Consolas,"Liberation Mono",monospace;
  font-size:0.88em;
}
.article-empty{
  max-width:680px;
  margin:0 auto;
  padding:70px 20px;
  text-align:center;
  background:var(--bg-surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
}
.article-empty i{
  display:inline-block;
  font-size:36px;
  color:var(--primary-neon);
  margin-bottom:18px;
}
.article-empty h2{
  font-size:28px;
  margin-bottom:10px;
}
.article-empty p{
  color:var(--text-mid);
  margin-bottom:24px;
}

.after-article{
  background:var(--bg-ink);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.after-article .grid-container{
  padding-top:0;
  padding-bottom:0;
}
.after-cta-card{
  background:
    radial-gradient(560px 180px at 15% 20%,rgba(0,229,160,0.06) 0%,rgba(0,0,0,0) 60%),
    radial-gradient(420px 160px at 88% 90%,rgba(176,38,255,0.05) 0%,rgba(0,0,0,0) 55%),
    var(--bg-surface);
  border:1px solid var(--line);
  border-radius:16px;
  padding:clamp(30px,4vw,48px);
  margin:clamp(24px,4vw,56px) 0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.after-cta-card h2{
  font-size:clamp(22px,3vw,30px);
  line-height:1.35;
  font-weight:800;
  margin-bottom:8px;
}
.after-cta-card p{
  color:var(--text-mid);
  font-size:15px;
  margin-bottom:0;
}
.after-cta-card .btn-actions{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}

.related-section{
  padding:clamp(60px,6vw,80px) 0 clamp(28px,4vw,40px);
}
.section-label{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--primary-neon);
  font-size:14px;
  font-weight:700;
  letter-spacing:0.1em;
  text-transform:uppercase;
  margin-bottom:10px;
}
.section-label::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--primary-neon);
  border-radius:99px;
  box-shadow:0 0 8px rgba(0,229,160,0.45);
}
.section-title{
  font-size:clamp(24px,3vw,32px);
  font-weight:800;
  line-height:1.35;
  letter-spacing:-0.01em;
  margin-bottom:20px;
}
/* 相关栏目入口卡片 */
.channel-card{
  height:100%;
  display:flex;
  flex-direction:column;
  background:var(--bg-surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:22px;
  color:var(--text-high);
  transition:transform .2s ease,border-color .2s ease,background .2s ease;
}
.channel-card:hover{
  transform:translateY(-4px);
  border-color:rgba(0,229,160,0.55);
  background:var(--bg-elevated);
  color:var(--text-high);
}
.channel-card .channel-ico{
  width:52px;
  height:52px;
  border-radius:12px;
  background:rgba(0,229,160,0.1);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid rgba(0,229,160,0.22);
  color:var(--primary-neon);
  font-size:22px;
  margin-bottom:18px;
}
.channel-card h3{
  font-size:18px;
  font-weight:700;
  margin-bottom:9px;
  color:var(--text-high);
}
.channel-card p{
  font-size:14px;
  line-height:1.7;
  color:var(--text-mid);
  margin-bottom:0;
}
.channel-card .channel-arrow{
  margin-top:auto;
  padding-top:16px;
  color:var(--primary-neon);
  font-size:14px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  transition:gap .2s ease;
}
.channel-card:hover .channel-arrow{gap:14px;}

.site-footer{
  background:var(--bg-ink);
  border-top:1px solid var(--primary-neon);
}
.site-footer .grid-container{
  max-width:1200px;
}
.footer-main{
  display:flex;
  flex-wrap:wrap;
  padding:clamp(48px,5vw,68px) 0 44px;
}
.footer-brand-cell{
  padding:0 16px 0 0;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:20px;
  font-weight:800;
  color:var(--text-high);
  margin-bottom:14px;
}
.footer-desc{
  font-size:14px;
  line-height:1.8;
  color:var(--text-mid);
  margin-bottom:18px;
  max-width:300px;
}
.footer-link-cta{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:14px;
  font-weight:700;
  color:var(--primary-neon);
  border:1px solid rgba(0,229,160,0.25);
  background:rgba(0,229,160,0.07);
  padding:10px 16px;
  border-radius:8px;
  transition:background .2s ease,transform .2s ease,border-color .2s ease;
}
.footer-link-cta:hover{
  background:rgba(0,229,160,0.13);
  border-color:var(--primary-neon);
  transform:translateY(-2px);
}
.footer-links-row{
  display:flex;
  justify-content:flex-end;
  flex-wrap:wrap;
  gap:clamp(24px,4vw,56px);
}
.footer-col{
  min-width:130px;
}
.footer-col h4{
  position:relative;
  font-size:14px;
  color:var(--primary-neon);
  letter-spacing:0.08em;
  padding-left:12px;
  margin-bottom:18px;
  font-weight:700;
}
.footer-col h4::before{
  content:"";
  position:absolute;
  left:0;
  top:0.2em;
  width:3px;
  height:1em;
  background:var(--primary-neon);
  border-radius:2px;
  box-shadow:0 0 8px rgba(0,229,160,0.3);
}
.footer-col ul{
  list-style:none;
  margin:0;
  padding:0;
}
.footer-col li{
  margin-bottom:12px;
}
.footer-col a{
  font-size:14px;
  color:var(--text-mid);
}
.footer-col a:hover{
  color:var(--primary-neon);
}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 28px;
  display:flex;
  justify-content:space-between;
  gap:8px;
  flex-wrap:wrap;
  color:var(--text-low);
  font-size:13px;
  margin-top:8px;
}
.footer-bottom p{margin:0;}

@media screen and (max-width:1024px){
  .header-inner{
    min-height:64px;
  }
  .main-nav{
    flex:none;
    display:none;
    flex-wrap:wrap;
    width:100%;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:4px 0 14px;
  }
  .main-nav.open{
    display:flex;
  }
  .nav-link{
    justify-content:space-between;
    padding:13px 2px;
    border-bottom:1px solid var(--line);
    width:100%;
  }
  .nav-toggle{
    display:inline-flex;
  }
  .footer-links-row{
    padding-top:30px;
  }
}
@media screen and (max-width:767px){
  body{font-size:15px;}
  .brand-name{font-size:18px;}
  .article-hero h1{font-size:30px;}
  .article-body{font-size:16px;}
  .after-cta-card{padding:26px 20px;}
  .footer-bottom{
    justify-content:center;
    text-align:center;
  }
  .article-meta{gap:10px 14px;}
}
@media screen and (max-width:520px){
  .header-cta .btn{
    display:none;
  }
  .header-inner{
    gap:0;
  }
  .brand{
    margin-right:auto;
  }
  .header-actions{
    margin-left:auto;
  }
  .nav-toggle{
    width:38px;
    height:38px;
  }
  .article-hero h1{
    font-size:27px;
  }
  .btn{
    padding:0 18px;
    font-size:14px;
  }
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:0.001s !important;
    transition-duration:0.001s !important;
    scroll-behavior:auto !important;
  }
}

/* roulang page: category2 */
:root {
  --bg-ink: #0B0E14;
  --bg-surface: #131824;
  --bg-elevated: #1A2130;
  --bg-deep: #0D1117;
  --primary-neon: #00E5A0;
  --secondary-neon: #B026FF;
  --gradient-cta: linear-gradient(135deg, #00E5A0 0%, #8B5CF6 100%);
  --text-high: #F2F5F8;
  --text-mid: #A0AABA;
  --text-low: #5B6472;
  --line: rgba(255, 255, 255, 0.08);
  --line-bright: rgba(255, 255, 255, 0.16);
  --radius-card: 14px;
  --radius-btn: 8px;
  --radius-tag: 999px;
  --shadow-glow: 0 0 40px rgba(0, 229, 160, 0.18);
  --font-main: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition: 180ms ease;
  --section-y: clamp(72px, 10vw, 128px);
}
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}
body {
  background: var(--bg-ink);
  color: var(--text-high);
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img, svg, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
button, input, select, textarea { font-family: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--primary-neon);
  outline-offset: 3px;
  border-radius: 4px;
}
::selection { background: rgba(0, 229, 160, 0.3); color: #fff; }

.grid-container { max-width: 1200px; width: 100%; margin: 0 auto; }
.section-pad { padding: var(--section-y) 0; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(11, 14, 20, 0.92);
  border-top: 3px solid var(--primary-neon);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.site-header .header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-mark {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gradient-cta);
  box-shadow: 0 0 14px rgba(0, 229, 160, 0.55);
  display: inline-block;
}
.brand-name {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.main-nav { display: flex; align-items: center; gap: 30px; margin-left: auto; }
.main-nav .nav-link {
  position: relative;
  color: var(--text-mid);
  font-weight: 500;
  font-size: 15px;
  padding: 6px 0;
  transition: color var(--transition);
}
.main-nav .nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--primary-neon);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 280ms ease;
  border-radius: 2px;
}
.main-nav .nav-link:hover { color: var(--text-high); }
.main-nav .nav-link:hover::after { transform: scaleX(1); }
.main-nav .nav-link.active {
  color: var(--primary-neon);
  text-shadow: 0 0 12px rgba(0, 229, 160, 0.4);
}
.main-nav .nav-link.active::after { transform: scaleX(1); }
.header-actions { display: flex; align-items: center; gap: 12px; margin-left: 12px; }
.header-cta .btn-compact { min-width: 128px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-btn);
  font-weight: 700;
  font-size: 15px;
  border: 0;
  cursor: pointer;
  transition: all 180ms ease;
  line-height: 1;
}
.btn-primary {
  background: var(--gradient-cta);
  color: #0B0E14;
  min-height: 46px;
  padding: 0 28px;
  box-shadow: 0 0 18px rgba(0, 229, 160, 0.18);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 229, 160, 0.3);
  color: #05070c;
}
.btn-secondary {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  color: var(--text-high);
  min-height: 46px;
  padding: 0 28px;
}
.btn-secondary:hover {
  border-color: var(--primary-neon);
  color: var(--primary-neon);
  transform: translateY(-2px);
}
.btn-large { min-height: 54px; padding: 0 36px; font-size: 16px; }
.btn-compact { min-height: 40px; padding: 0 20px; font-size: 14px; }

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  background: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-high);
  border-radius: 2px;
  position: absolute;
  left: 11px;
  transition: 200ms ease;
}
.nav-toggle span { top: 20px; }
.nav-toggle span::before { top: -5px; }
.nav-toggle span::after { top: 5px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: rotate(45deg); top: 0; }
.nav-toggle[aria-expanded="true"] span::after { transform: rotate(-45deg); top: 0; }

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-ink);
  border-top: 1px solid var(--primary-neon);
}
.footer-main { padding-top: 68px; padding-bottom: 48px; position: relative; }
.footer-brand-cell { padding-right: 48px; }
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--text-high);
  margin-bottom: 18px;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-mid);
  margin-bottom: 20px;
}
.footer-link-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-neon);
}
.footer-link-cta i {
  transition: transform 180ms ease;
}
.footer-link-cta:hover i { transform: translateX(4px); }
.footer-links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
}
.footer-col { flex: 1 1 0; min-width: 160px; }
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-high);
  padding-left: 12px;
  border-left: 3px solid var(--primary-neon);
  margin-bottom: 20px;
  line-height: 1.4;
}
.footer-col ul { list-style: none; display: grid; gap: 12px; }
.footer-col a { font-size: 14px; color: var(--text-mid); }
.footer-col a:hover { color: var(--primary-neon); }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 24px 0 28px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-low);
}

/* ===== Category Page Hero ===== */
.category-hero {
  position: relative;
  background-color: var(--bg-ink);
  background-image: linear-gradient(rgba(11, 14, 20, 0.68), rgba(11, 14, 20, 0.92)), url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.category-hero::before {
  content: "";
  position: absolute;
  width: 360px;
  height: 360px;
  right: -120px;
  top: -140px;
  background: rgba(176, 38, 255, 0.2);
  filter: blur(110px);
  pointer-events: none;
}
.category-breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-low);
  margin-bottom: 26px;
  position: relative;
  z-index: 2;
}
.category-breadcrumb a { color: var(--text-low); }
.category-breadcrumb a:hover { color: var(--primary-neon); }
.category-breadcrumb .sep { opacity: 0.5; }
.category-breadcrumb .current { color: var(--text-mid); }
.category-title-row {
  position: relative;
  z-index: 2;
  max-width: 960px;
}
.category-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-neon);
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}
.category-eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--primary-neon);
  border-radius: 2px;
}
.category-hero h1 {
  font-size: clamp(38px, 5vw, 54px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 18px;
}
.category-hero .category-lead {
  font-size: 16px;
  line-height: 1.95;
  color: var(--text-mid);
  max-width: 820px;
  margin-bottom: 22px;
}
.category-hero .category-lead strong { color: var(--text-high); font-weight: 600; }
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-tag);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  font-size: 13px;
  color: var(--text-mid);
  transition: all 200ms ease;
}
.tag:hover { color: var(--primary-neon); border-color: var(--primary-neon); }
.tag i { font-size: 12px; color: var(--primary-neon); }
.category-hero-cta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== Data Strip ===== */
.data-strip {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--line);
  padding: 28px 0;
}
.data-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-right: 20px;
}
.data-item:not(:last-child) { border-right: 1px solid var(--line); margin-right: 6px; }
.data-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(0, 229, 160, 0.09);
  color: var(--primary-neon);
  font-size: 14px;
}
.data-meta b {
  display: block;
  font-size: 15px;
  line-height: 1.3;
  color: var(--text-high);
  font-weight: 700;
}
.data-meta span { font-size: 12px; color: var(--text-low); }

/* ===== Section Header ===== */
.sec-head {
  margin-bottom: 44px;
  max-width: 840px;
}
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-head .sec-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  color: var(--secondary-neon);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.sec-head .sec-eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--secondary-neon); border-radius: 2px; }
.sec-head h2 {
  font-size: clamp(28px, 3.6vw, 38px);
  line-height: 1.28;
  font-weight: 800;
  color: var(--text-high);
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}
.sec-head .sec-lead {
  font-size: 16px;
  color: var(--text-mid);
  line-height: 1.85;
}

/* ===== Topic Cards ===== */
.topic-card {
  background: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  overflow: hidden;
  height: 100%;
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
  display: flex;
  flex-direction: column;
}
.topic-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 160, 0.45);
  box-shadow: 0 10px 36px rgba(0, 0, 0, 0.24), 0 0 22px rgba(0, 229, 160, 0.06);
}
.topic-card .topic-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--bg-deep);
}
.topic-card .topic-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 520ms cubic-bezier(0.23, 1, 0.32, 1);
}
.topic-card:hover .topic-media img { transform: scale(1.05); }
.topic-card .topic-body {
  padding: clamp(18px, 2.4vw, 26px);
  display: flex;
  flex-direction: column;
  flex: 1;
}
.topic-card .topic-tagline {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  color: var(--primary-neon);
  background: rgba(0, 229, 160, 0.08);
  border-radius: var(--radius-tag);
  padding: 4px 12px;
  margin-bottom: 14px;
  align-self: flex-start;
}
.topic-card h3 { font-size: 20px; font-weight: 700; color: var(--text-high); line-height: 1.5; margin-bottom: 10px; }
.topic-card p { font-size: 14px; color: var(--text-mid); line-height: 1.85; margin-bottom: 0; }
.topic-card .topic-more {
  margin-top: 18px;
  font-size: 13px;
  color: var(--text-low);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.topic-card:hover .topic-more { color: var(--primary-neon); }
.topic-card .topic-more i { transition: transform 180ms ease; }
.topic-card:hover .topic-more i { transform: translateX(4px); }

/* ===== Feature Mini Cards ===== */
.mini-feature {
  height: 100%;
  border: 1px solid var(--line);
  background: var(--bg-surface);
  border-radius: var(--radius-card);
  padding: clamp(20px, 3vw, 30px);
  transition: all 200ms ease;
  position: relative;
  overflow: hidden;
}
.mini-feature::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-cta);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 240ms ease;
}
.mini-feature:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 160, 0.35);
}
.mini-feature:hover::before { transform: scaleX(1); }
.mini-feature .mini-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--primary-neon);
  background: rgba(0, 229, 160, 0.07);
  margin-bottom: 18px;
}
.mini-feature h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--text-high); }
.mini-feature p { font-size: 14px; color: var(--text-mid); line-height: 1.8; margin-bottom: 0; }
.mini-feature .mini-num {
  position: absolute;
  right: 18px;
  top: 16px;
  font-size: 20px;
  font-weight: 800;
  opacity: 0.12;
  color: var(--text-high);
}

/* ===== Guide Steps ===== */
.steps-wrap {
  background: var(--bg-deep);
  border-radius: 20px;
  padding: clamp(24px, 5vw, 56px);
  border: 1px solid var(--line);
}
.step-col { position: relative; margin-bottom: 24px; }
.step-num {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--gradient-cta);
  color: #0B0E14;
  font-size: 18px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  box-shadow: 0 0 24px rgba(0, 229, 160, 0.18);
}
.step-col h3 { font-size: 18px; font-weight: 700; color: var(--text-high); margin-bottom: 8px; }
.step-col p { font-size: 14px; color: var(--text-mid); line-height: 1.85; margin-bottom: 0; }
.step-col:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -12px;
  top: 18px;
  width: 1px;
  height: 64px;
  background: var(--line);
}

/* ===== Scenario split ===== */
.scenario-split {
  background: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
}
.scenario-media {
  position: relative;
  min-height: 320px;
  height: 100%;
  background-image: url('/assets/images/coverpic/cover-5.png');
  background-size: cover;
  background-position: center;
}
.scenario-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 20%, rgba(19, 24, 36, 0.4) 75%, var(--bg-surface));
}
.scenario-media img { height: 100%; min-height: 320px; object-fit: cover; width: 100%; }
.scenario-info { padding: clamp(24px, 5vw, 48px); }
.scenario-info h3 { font-size: 24px; font-weight: 800; margin-bottom: 16px; color: #fff; }
.scenario-info p { font-size: 15px; color: var(--text-mid); margin-bottom: 20px; line-height: 1.9; }
.scenario-scene-list { margin: 0; list-style: none; display: grid; gap: 14px; }
.scenario-scene-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 14px;
  color: var(--text-mid);
}
.scenario-scene-list i {
  color: var(--primary-neon);
  margin-top: 4px;
  font-size: 14px;
  flex-shrink: 0;
}

/* ===== FAQ ===== */
.faq-wrap {
  background: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 10px 24px;
}
.faq-item {
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
}
.faq-item:last-child { border-bottom: 0; }
.faq-item .faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  width: 100%;
  background: none;
  border: 0;
  color: var(--text-high);
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  line-height: 1.6;
  padding: 4px 0;
}
.faq-item .faq-q:hover { color: var(--primary-neon); }
.faq-item .faq-q::before {
  content: "";
  width: 4px;
  height: 20px;
  border-radius: 2px;
  background: var(--primary-neon);
  flex-shrink: 0;
}
.faq-item .faq-q .faq-icon {
  margin-left: auto;
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  position: relative;
  background: rgba(255, 255, 255, 0.08);
  transition: transform 200ms ease, background 200ms ease;
}
.faq-item .faq-q .faq-icon::before,
.faq-item .faq-q .faq-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 10px;
  height: 2px;
  background: var(--text-high);
  border-radius: 2px;
  transition: background 200ms ease;
}
.faq-item .faq-q .faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); transition: transform 200ms ease; }
.faq-item .faq-q[aria-expanded="true"] { color: var(--primary-neon); }
.faq-item .faq-q[aria-expanded="true"] .faq-icon::before,
.faq-item .faq-q[aria-expanded="true"] .faq-icon::after { background: var(--primary-neon); }
.faq-item .faq-q[aria-expanded="true"] .faq-icon { transform: rotate(135deg); }
.faq-item .faq-a {
  padding: 14px 28px 0 22px;
  font-size: 15px;
  color: var(--text-mid);
  line-height: 1.9;
  display: none;
}
.faq-item .faq-a.active { display: block; }

/* ===== Page Bottom CTA ===== */
.page-cta {
  background: var(--bg-elevated);
  border-top: 1px solid var(--line);
  position: relative;
  overflow: hidden;
  padding: 56px 0 64px;
}
.page-cta::before {
  content: "";
  position: absolute;
  left: 18%;
  top: 0;
  width: 240px;
  height: 240px;
  background: rgba(0, 229, 160, 0.07);
  filter: blur(90px);
}
.page-cta::after {
  content: "";
  position: absolute;
  right: 8%;
  bottom: -80px;
  width: 220px;
  height: 220px;
  background: rgba(176, 38, 255, 0.07);
  filter: blur(80px);
}
.page-cta .inner { position: relative; z-index: 2; text-align: center; }
.page-cta h2 { font-size: 28px; font-weight: 800; color: #fff; margin-bottom: 10px; }
.page-cta p { font-size: 15px; color: var(--text-mid); margin-bottom: 26px; }
.page-cta .btn-large {
  animation: pulseGlow 2.4s infinite;
}
@keyframes pulseGlow {
  0% { box-shadow: 0 0 0 0 rgba(0, 229, 160, 0.35); }
  70% { box-shadow: 0 0 0 14px rgba(0, 229, 160, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 229, 160, 0); }
}

/* ===== Responsive ===== */
@media screen and (max-width: 1024px) {
  .main-nav { gap: 20px; }
  .main-nav .nav-link { font-size: 14px; }
}
@media screen and (max-width: 900px) {
  .site-header .header-inner { min-height: 72px; }
  .header-cta { display: none; }
  .main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-elevated);
    padding: 88px 24px 28px;
    transform: translateX(100%);
    visibility: hidden;
    opacity: 0;
    transition: transform 180ms ease, opacity 180ms ease;
    height: 100vh;
    overflow-y: auto;
    z-index: -1;
    margin-left: 0;
  }
  .main-nav.open { transform: translateX(0); visibility: visible; opacity: 1; }
  .main-nav .nav-link {
    font-size: 16px;
    color: var(--text-high);
    border-bottom: 1px solid var(--line);
    padding: 18px 0;
  }
  .main-nav .nav-link.active { color: var(--primary-neon); }
  .main-nav .nav-link::after { display: none; }
  .nav-toggle { display: flex; }
  .header-inner { justify-content: space-between; }
  .footer-links-row { margin-top: 20px; gap: 20px; }
  .footer-col { flex-basis: auto; }
  .data-item:not(:last-child) { border-right: 0; }
  .step-col:not(:last-child)::after { display: none; }
}
@media screen and (max-width: 640px) {
  .site-header .header-inner { height: 60px; min-height: 60px; }
  .brand-name { font-size: 17px; }
  .category-hero { padding: 40px 0 48px; }
  .category-hero h1 { font-size: 34px; }
  .category-hero .category-lead { font-size: 15px; }
  .category-hero-cta .btn { width: 100%; }
  .sec-head h2 { font-size: 26px; }
  .sec-head { margin-bottom: 28px; }
  .mini-feature p { font-size: 13px; }
  .step-col { padding-right: 0; }
  .scenario-split .scenario-media { min-height: 220px; }
  .page-cta h2 { font-size: 24px; }
  .page-cta .btn-large { width: 100%; }
  .footer-bottom { flex-direction: column; gap: 6px; }
  .data-item { min-width: 50%; margin-bottom: 12px; }
}

/* roulang page: category3 */
:root {
            --bg-ink: #0B0E14;
            --bg-surface: #131824;
            --bg-elevated: #1A2130;
            --primary-neon: #00E5A0;
            --secondary-neon: #B026FF;
            --text-high: #F2F5F8;
            --text-mid: #A0AABA;
            --text-low: #5B6472;
            --line: rgba(255,255,255,0.08);
            --gradient-cta: linear-gradient(135deg, #00E5A0, #8B5CF6);
            --radius-card: 14px;
            --radius-btn: 8px;
            --radius-tag: 999px;
        }

        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            background: var(--bg-ink);
            color: var(--text-high);
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Segoe UI", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease, border-color .2s ease, opacity .2s ease, transform .2s ease, box-shadow .2s ease;
        }

        button, input, select, textarea {
            font-family: inherit;
        }

        ul, ol {
            list-style: none;
        }

        .grid-container {
            max-width: 1200px;
        }

        #mainContent {
            min-height: 80vh;
            overflow: hidden;
        }

        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 2px solid var(--primary-neon) !important;
            outline-offset: 3px;
            border-radius: 4px;
        }

        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: .01ms !important;
                animation-iteration-count: 1 !important;
                scroll-behavior: auto !important;
                transition-duration: .01ms !important;
            }
        }

        /* ===== Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 120;
            background: rgba(11, 14, 20, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 3px solid var(--primary-neon);
            border-bottom: 1px solid var(--line);
        }

        .site-header .grid-container {
            position: relative;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 72px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--text-high);
            font-size: 19px;
            font-weight: 800;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .brand-mark {
            width: 10px;
            height: 10px;
            border-radius: 999px;
            background: var(--primary-neon);
            box-shadow: 0 0 12px rgba(0, 229, 160, 0.85), 0 0 3px rgba(176, 38, 255, 0.9);
            display: inline-block;
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 34px;
            margin-left: auto;
        }

        .nav-link {
            display: inline-block;
            padding: 8px 0;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-mid);
            position: relative;
            line-height: 1.4;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--primary-neon);
            box-shadow: 0 0 10px rgba(0, 229, 160, 0.45);
            transition: width .25s ease-out;
        }

        .nav-link:hover {
            color: var(--text-high);
        }

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--primary-neon);
            text-shadow: 0 0 12px rgba(0, 229, 160, 0.5);
        }

        .nav-link.active::after {
            width: 100%;
            background: var(--primary-neon);
        }

        .header-cta {
            margin-left: 6px;
            display: flex;
            align-items: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 15px;
            line-height: 1;
            cursor: pointer;
            border: 0;
            transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease, color .2s ease;
            text-align: center;
        }

        .btn-compact {
            height: 42px;
            padding: 0 22px;
            font-size: 14px;
        }

        .btn-primary {
            background: var(--gradient-cta);
            color: #07100d;
            box-shadow: 0 0 22px rgba(0, 229, 160, 0.15);
        }

        .btn-primary:hover,
        .btn-primary:focus {
            color: #030806;
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 229, 160, 0.32);
        }

        .btn-ghost {
            background: transparent;
            border: 1px solid var(--line);
            color: var(--text-high);
            height: 48px;
            padding: 0 26px;
        }

        .btn-ghost:hover {
            border-color: var(--primary-neon);
            color: var(--primary-neon);
            transform: translateY(-2px);
        }

        .nav-toggle {
            display: none;
            border: 1px solid var(--line);
            border-radius: 10px;
            background: var(--bg-elevated);
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            padding: 0;
        }

        .nav-toggle span,
        .nav-toggle span::before,
        .nav-toggle span::after {
            content: "";
            display: block;
            width: 18px;
            height: 2px;
            background: var(--text-high);
            border-radius: 4px;
            position: relative;
            transition: transform .22s ease, opacity .22s ease;
        }

        .nav-toggle span::before {
            position: absolute;
            top: -6px;
            left: 0;
        }

        .nav-toggle span::after {
            position: absolute;
            top: 6px;
            left: 0;
        }

        @media (max-width: 880px) {
            .header-cta {
                display: none;
            }

            .nav-toggle {
                display: inline-flex;
            }

            .main-nav {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-elevated);
                border-top: 1px solid var(--line);
                border-bottom: 1px solid var(--line);
                align-items: stretch;
                flex-direction: column;
                gap: 0;
                padding: 10px 18px 18px;
                display: none;
                max-height: calc(100vh - 72px);
                overflow-y: auto;
            }

            .main-nav.nav-open {
                display: flex;
            }

            .main-nav .nav-link {
                padding: 15px 4px;
                width: 100%;
                border-bottom: 1px solid var(--line);
                color: var(--text-mid);
            }

            .main-nav .nav-link.active {
                color: var(--primary-neon);
            }

            .nav-link::after {
                display: none;
            }
        }

        /* ===== Hero small ===== */
        .page-hero-small {
            position: relative;
            padding: 120px 0 52px;
            background:
                linear-gradient(90deg, rgba(11,14,20,0.94) 0%, rgba(11,14,20,0.78) 65%, rgba(176,38,255,0.12) 130%),
                url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            border-bottom: 1px solid var(--line);
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-low);
            margin-bottom: 22px;
        }

        .breadcrumb a {
            color: var(--text-low);
        }

        .breadcrumb a:hover {
            color: var(--primary-neon);
        }

        .breadcrumb .separator {
            opacity: 0.45;
        }

        .breadcrumb .current {
            color: var(--text-mid);
            max-width: 360px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .hero-small-title {
            font-size: clamp(32px, 5vw, 48px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;
            color: var(--text-high);
            margin: 0 0 18px;
        }

        .hero-small-title::after {
            content: "";
            display: block;
            width: 80px;
            height: 4px;
            margin-top: 22px;
            border-radius: 999px;
            background: var(--primary-neon);
            box-shadow: 0 0 18px rgba(0, 229, 160, 0.5);
        }

        .hero-small-lead {
            max-width: 780px;
            font-size: 17px;
            line-height: 1.85;
            color: var(--text-mid);
            margin: 20px 0 26px;
        }

        .tag-row {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            min-height: 30px;
            padding: 4px 15px;
            border: 1px solid var(--line);
            background: rgba(255,255,255,0.02);
            color: var(--text-mid);
            font-size: 13px;
            border-radius: var(--radius-tag);
            transition: border-color .2s ease, color .2s ease, background .2s ease;
        }

        .tag:hover {
            border-color: var(--primary-neon);
            color: var(--primary-neon);
        }

        .tag-solid {
            border-color: rgba(0,229,160,0.45);
            background: rgba(0,229,160,0.06);
            color: var(--primary-neon);
        }

        /* ===== Trustbar ===== */
        .trustbar {
            border-bottom: 1px solid var(--line);
            background: #0D1117;
            padding: 28px 0;
        }

        .trust-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0,229,160,0.08);
            border: 1px solid rgba(0,229,160,0.16);
            color: var(--primary-neon);
            font-size: 18px;
            margin-bottom: 12px;
        }

        .trust-item {
            display: flex;
            flex-direction: column;
            padding: 8px 12px;
            min-height: 84px;
            border-left: 1px solid var(--line);
        }

        .trust-item:first-child {
            border-left: 0;
        }

        .trust-item h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-high);
            line-height: 1.4;
            margin-bottom: 5px;
        }

        .trust-item p {
            font-size: 13px;
            color: var(--text-low);
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .trustbar {
                padding: 20px 0;
            }

            .trust-item {
                border-left: 0;
                padding: 10px 6px;
            }
        }

        /* ===== Section base ===== */
        .category-section {
            padding: clamp(72px, 9vw, 118px) 0;
            border-bottom: 1px solid var(--line);
        }

        .section-eyebrow {
            display: inline-block;
            color: var(--primary-neon);
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0.04em;
            margin-bottom: 14px;
            position: relative;
            padding-left: 18px;
        }

        .section-eyebrow::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 8px;
            height: 2px;
            background: var(--secondary-neon);
            box-shadow: 0 0 8px rgba(176, 38, 255, 0.5);
        }

        .section-title {
            font-size: clamp(26px, 3.4vw, 36px);
            font-weight: 800;
            letter-spacing: -0.015em;
            line-height: 1.25;
            color: var(--text-high);
            margin-bottom: 12px;
        }

        .section-lead {
            font-size: 16px;
            color: var(--text-mid);
            max-width: 820px;
            line-height: 1.85;
        }

        /* ===== Showcase ===== */
        .showcase-section {
            background: var(--bg-ink);
            padding: clamp(72px, 9vw, 116px) 0;
        }

        .showcase-image-wrap {
            border-radius: 20px;
            overflow: hidden;
            position: relative;
            border: 1px solid var(--line);
            box-shadow: 22px 22px 0 rgba(176,38,255,0.06);
        }

        .showcase-image-wrap img {
            width: 100%;
            height: 420px;
            object-fit: cover;
            object-position: center;
        }

        .showcase-badge {
            position: absolute;
            right: 16px;
            bottom: 16px;
            background: rgba(11,14,20,0.82);
            backdrop-filter: blur(8px);
            border: 1px solid var(--line);
            border-radius: 999px;
            padding: 8px 16px;
            font-size: 12px;
            color: var(--primary-neon);
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .showcase-copy .section-title {
            margin-bottom: 16px;
        }

        .showcase-copy .lead-copy {
            font-size: 16px;
            color: var(--text-mid);
            line-height: 1.9;
            margin: 18px 0 28px;
        }

        .point-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 16px;
        }

        .point-card {
            background: var(--bg-surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 22px;
            transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
        }

        .point-card:hover {
            transform: translateY(-3px);
            border-color: rgba(0,229,160,0.36);
            box-shadow: 0 12px 30px rgba(0,0,0,0.24);
        }

        .point-icon {
            width: 42px;
            height: 42px;
            background: rgba(176,38,255,0.09);
            border: 1px solid rgba(176,38,255,0.2);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--secondary-neon);
            font-size: 17px;
            margin-bottom: 14px;
        }

        .point-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-high);
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .point-card p {
            font-size: 14px;
            color: var(--text-low);
            line-height: 1.7;
        }

        @media (max-width: 880px) {
            .showcase-image-wrap img {
                height: 320px;
            }

            .showcase-image-wrap {
                margin-bottom: 32px;
            }

            .point-grid {
                gap: 12px;
            }
        }

        @media (max-width: 520px) {
            .point-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Three dimensions ===== */
        .dimensions-section {
            background: #0D1117;
        }

        .section-header {
            margin-bottom: 44px;
        }

        .feature-placeholder {
            height: 100%;
        }

        .dim-card {
            background: var(--bg-surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 30px;
            height: 100%;
            transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
            position: relative;
        }

        .dim-card:hover {
            transform: translateY(-5px);
            border-color: rgba(0,229,160,0.38);
            box-shadow: 0 16px 38px rgba(0,0,0,0.28);
        }

        .dim-card::after {
            content: "";
            position: absolute;
            left: 30px;
            right: 30px;
            bottom: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary-neon), var(--secondary-neon));
            opacity: 0;
            transform: scaleX(0.3);
            transform-origin: left;
            transition: opacity .25s ease, transform .25s ease;
        }

        .dim-card:hover::after {
            opacity: 1;
            transform: scaleX(1);
        }

        .dim-icon {
            width: 54px;
            height: 54px;
            background: rgba(0,229,160,0.08);
            border: 1px solid rgba(0,229,160,0.16);
            border-radius: 13px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-neon);
            font-size: 22px;
            margin-bottom: 24px;
        }

        .dim-card:nth-child(2) .dim-icon {
            color: var(--secondary-neon);
            background: rgba(176,38,255,0.09);
            border-color: rgba(176,38,255,0.2);
        }

        .dim-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-high);
            line-height: 1.35;
            margin-bottom: 12px;
        }

        .dim-card p {
            font-size: 15px;
            color: var(--text-mid);
            line-height: 1.8;
        }

        .dim-card .dim-note {
            display: inline-block;
            margin-top: 20px;
            font-size: 13px;
            color: var(--primary-neon);
        }

        /* ===== Check focus section ===== */
        .matrix-section {
            background: var(--bg-ink);
        }

        .matrix-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 16px;
        }

        .matrix-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            background: var(--bg-surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 22px;
            transition: border-color .2s ease, background .2s ease;
        }

        .matrix-item:hover {
            border-color: rgba(0,229,160,0.3);
            background: var(--bg-elevated);
        }

        .matrix-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 9px;
            background: rgba(0,229,160,0.08);
            border: 1px solid rgba(0,229,160,0.14);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-neon);
            font-size: 16px;
        }

        .matrix-item h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-high);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .matrix-item p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.75;
        }

        @media (max-width: 768px) {
            .matrix-grid {
                grid-template-columns: 1fr;
            }

            .matrix-item {
                padding: 18px;
            }
        }

        /* ===== Media index ===== */
        .index-section {
            background: #0D1117;
            border-bottom: 1px solid var(--line);
        }

        .index-list {
            display: grid;
            gap: 20px;
        }

        .index-row {
            display: flex;
            align-items: stretch;
            background: var(--bg-surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: border-color .2s ease, box-shadow .2s ease;
        }

        .index-row:hover {
            border-color: rgba(0,229,160,0.36);
            box-shadow: 0 12px 34px rgba(0,0,0,0.26);
        }

        .index-thumb {
            flex: 0 0 250px;
            min-height: 152px;
            position: relative;
            overflow: hidden;
        }

        .index-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center;
        }

        .index-index {
            position: absolute;
            left: 10px;
            top: 10px;
            width: 32px;
            height: 32px;
            background: rgba(11,14,20,0.84);
            border: 1px solid var(--line);
            border-radius: 999px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary-neon);
        }

        .index-content {
            flex: 1;
            padding: 26px 30px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .index-content h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-high);
            margin-bottom: 9px;
            line-height: 1.4;
        }

        .index-content p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.75;
            margin-bottom: 14px;
            max-width: 720px;
        }

        .index-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary-neon);
        }

        .index-more i {
            transition: transform .2s ease;
        }

        .index-row:hover .index-more i {
            transform: translateX(4px);
        }

        @media (max-width: 768px) {
            .index-row {
                flex-direction: column;
            }

            .index-thumb {
                flex: 0 0 auto;
                width: 100%;
                height: 200px;
            }

            .index-content {
                padding: 20px;
            }

            .index-content h3 {
                font-size: 18px;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-ink);
        }

        .faq-intro h2 {
            margin-bottom: 16px;
        }

        .faq-intro .faq-desc {
            font-size: 15px;
            color: var(--text-mid);
            line-height: 1.85;
            margin-bottom: 24px;
        }

        .faq-nav-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary-neon);
            font-weight: 600;
            font-size: 14px;
        }

        .faq-nav-link i {
            transition: transform .2s ease;
        }

        .faq-nav-link:hover i {
            transform: translateX(4px);
        }

        .faq-accordion {
            border-top: 1px solid var(--line);
        }

        .faq-item {
            border-bottom: 1px solid var(--line);
        }

        .faq-item summary {
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            cursor: pointer;
            padding: 22px 4px 22px 0;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-high);
            line-height: 1.5;
            transition: color .2s ease;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: "\f067";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 15px;
            color: var(--text-low);
            width: 32px;
            height: 32px;
            border: 1px solid var(--line);
            border-radius: 999px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: transform .22s ease, color .22s ease, border-color .22s ease;
        }

        .faq-item[open] summary {
            color: var(--primary-neon);
        }

        .faq-item[open] summary::after {
            transform: rotate(45deg);
            color: var(--primary-neon);
            border-color: rgba(0,229,160,0.4);
        }

        .faq-answer {
            padding: 0 42px 24px 0;
            color: var(--text-mid);
            font-size: 15px;
            line-height: 1.85;
        }

        @media (max-width: 768px) {
            .faq-item summary {
                font-size: 16px;
                padding: 18px 0;
            }

            .faq-answer {
                padding: 0 10px 20px 0;
                font-size: 14px;
            }
        }

        /* ===== CTA band ===== */
        .cta-band {
            position: relative;
            background:
                linear-gradient(135deg, rgba(11,14,20,0.9), rgba(19,24,36,0.9)),
                url('/assets/images/backpic/back-3.webp') center / cover no-repeat;
            padding: 72px 0;
            border-bottom: 1px solid var(--line);
        }

        .cta-inner {
            padding: 40px 0;
            text-align: center;
        }

        .cta-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1px solid rgba(0,229,160,0.2);
            background: rgba(0,229,160,0.05);
            color: var(--primary-neon);
            font-size: 13px;
            border-radius: 999px;
            padding: 6px 15px;
            margin-bottom: 20px;
        }

        .cta-inner h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.3;
            color: var(--text-high);
            margin-bottom: 14px;
        }

        .cta-inner p {
            font-size: 16px;
            color: var(--text-mid);
            max-width: 620px;
            margin: 0 auto 30px;
            line-height: 1.85;
        }

        .btn-large {
            height: 54px;
            padding: 0 36px;
            font-size: 16px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-ink);
            border-top: 1px solid var(--primary-neon);
            padding: 56px 0 28px;
        }

        .site-footer .footer-main {
            padding-bottom: 42px;
        }

        .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 23px;
            font-weight: 800;
            letter-spacing: -0.01em;
            color: var(--text-high);
            margin-bottom: 14px;
        }

        .footer-desc {
            color: var(--text-mid);
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
            margin-bottom: 20px;
        }

        .footer-link-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary-neon);
            font-size: 14px;
            font-weight: 600;
        }

        .footer-link-cta i {
            transition: transform .2s ease;
        }

        .footer-link-cta:hover i {
            transform: translateX(4px);
        }

        .footer-links-row {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }

        .footer-col {
            flex: 1;
            min-width: 150px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-high);
            margin-bottom: 18px;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-col h4::before {
            content: "";
            width: 3px;
            height: 13px;
            background: var(--primary-neon);
            border-radius: 3px;
            box-shadow: 0 0 10px rgba(0,229,160,0.5);
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: var(--text-mid);
            font-size: 14px;
            transition: color .2s ease, transform .2s ease;
        }

        .footer-col ul li a:hover {
            color: var(--primary-neon);
        }

        .footer-bottom {
            border-top: 1px solid var(--line);
            padding-top: 22px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 10px;
            color: var(--text-low);
            font-size: 13px;
        }

        @media (max-width: 880px) {
            .footer-links-row {
                margin-top: 30px;
            }

            .footer-col {
                flex: 0 0 calc(50% - 24px);
            }
        }

        @media (max-width: 560px) {
            .site-footer {
                padding: 40px 0 24px;
            }

            .footer-col {
                flex: 0 0 100%;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 6px;
            }
        }

        /* ===== Buttons on mobile ===== */
        @media (max-width: 640px) {
            .btn-large {
                width: 100%;
                max-width: 320px;
                height: 52px;
            }
        }

/* roulang page: category4 */
:root{
  --bg-ink:#0B0E14;
  --bg-surface:#131824;
  --bg-elevated:#1A2130;
  --primary-neon:#00E5A0;
  --secondary-neon:#B026FF;
  --text-high:#F2F5F8;
  --text-mid:#A0AABA;
  --text-low:#5B6472;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --gradient-cta:linear-gradient(135deg,#00E5A0,#8B5CF6);
  --radius-card:16px;
  --radius-btn:8px;
  --radius-tag:999px;
  --shadow-glow:0 0 24px rgba(0,229,160,.32);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg-ink);
  color:var(--text-high);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.nav-open{overflow:hidden}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;background:none;border:0;cursor:pointer;color:inherit}
input,select,textarea{font:inherit}
ul{list-style:none}
::selection{background:var(--primary-neon);color:var(--bg-ink)}
.grid-container{max-width:1200px;padding-left:24px;padding-right:24px}
.grid-x.grid-padding-x > .cell{padding-left:14px;padding-right:14px}
:focus-visible{outline:3px solid rgba(0,229,160,.4);outline-offset:3px;border-radius:4px}
a,button,.btn,.topic-card,.footer-col a,.footer-link-cta{transition:color .2s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease,opacity .2s ease}

/* Header */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  height:72px;
  background:rgba(11,14,20,.93);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-top:3px solid var(--primary-neon);
  z-index:300;
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.brand{display:inline-flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:12px;height:12px;border-radius:4px;
  background:linear-gradient(135deg,var(--primary-neon),var(--secondary-neon));
  box-shadow:0 0 14px rgba(0,229,160,.65);
}
.brand-name{font-size:19px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:34px;margin-left:10px;flex:1}
.nav-link{
  position:relative;
  font-size:15px;font-weight:500;color:var(--text-mid);
  padding:10px 2px;line-height:1;
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:2px;
  background:var(--primary-neon);transform:scaleX(0);transform-origin:left;
  transition:transform .24s ease;
}
.nav-link:hover{color:var(--text-high)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--primary-neon);text-shadow:0 0 14px rgba(0,229,160,.4)}
.nav-link.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:18px;flex-shrink:0}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 20px;border-radius:var(--radius-btn);
  font-weight:700;line-height:1.2;white-space:nowrap;
}
.btn-compact{padding:10px 16px;font-size:14px}
.btn-primary{
  background:var(--gradient-cta);
  color:#fff;
  box-shadow:0 2px 14px rgba(139,92,246,.28);
}
.btn-primary:hover{
  color:#fff;
  transform:translateY(-2px);
  box-shadow:0 6px 26px rgba(0,229,160,.5);
}
.btn-ghost{border:1px solid var(--line-strong);color:var(--text-high);background:transparent}
.btn-ghost:hover{border-color:var(--primary-neon);color:var(--primary-neon);transform:translateY(-2px);box-shadow:0 0 18px rgba(0,229,160,.16)}
.nav-toggle{
  display:none;
  width:42px;height:42px;border:1px solid var(--line-strong);border-radius:10px;
  background:var(--bg-surface);align-items:center;justify-content:center;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;width:18px;height:2px;background:var(--text-high);transition:transform .24s ease,opacity .2s ease;
}
.nav-toggle span{left:50%;top:50%;transform:translate(-50%,-50%)}
.nav-toggle span::before{transform:translateY(6px)}
.nav-toggle span::after{transform:translateY(-6px)}
body.nav-open .nav-toggle span::before{transform:translate(-50%,-50%) rotate(45deg);top:50%;left:50%}
body.nav-open .nav-toggle span::after{transform:translate(-50%,-50%) rotate(-45deg);top:50%;left:50%}
body.nav-open .nav-toggle span{background:transparent}

/* Page Hero / Category Hero */
.category-hero{
  position:relative;
  padding:132px 0 56px;
  background:url('/assets/images/backpic/back-1.webp') center 35%/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.category-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(102deg,rgba(11,14,20,.94) 0%,rgba(11,14,20,.86) 55%,rgba(17,11,30,.88) 100%);
}
.category-hero .grid-container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--text-low);margin-bottom:26px}
.breadcrumb a{color:var(--text-low)}
.breadcrumb a:hover{color:var(--primary-neon)}
.breadcrumb span{opacity:.6}
.breadcrumb .current{color:var(--text-mid)}
.hero-title{
  font-size:clamp(36px,5vw,56px);
  line-height:1.2;font-weight:800;letter-spacing:-.02em;
}
.hero-intro{
  max-width:820px;font-size:16px;line-height:1.9;color:var(--text-mid);margin-top:20px;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.tag-link{
  display:inline-block;padding:7px 16px;border-radius:var(--radius-tag);
  font-size:13px;background:rgba(255,255,255,.05);border:1px solid var(--line);
  color:var(--text-mid);
}
.tag-link:hover{border-color:var(--primary-neon);color:var(--primary-neon);background:rgba(0,229,160,.08)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}

/* Generic section */
.section-block{padding:clamp(64px,8vw,100px) 0}
.section-block-dark{background:var(--bg-surface)}
.section-head{margin-bottom:44px;max-width:760px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--primary-neon);font-size:13px;font-weight:700;letter-spacing:.12em;
  text-transform:uppercase;margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--primary-neon);display:inline-block}
.section-title{
  font-size:clamp(26px,3.6vw,36px);
  font-weight:800;line-height:1.25;letter-spacing:-.01em;
}
.section-sub{font-size:16px;color:var(--text-mid);margin-top:14px}
.section-head-center{margin-left:auto;margin-right:auto;text-align:center}
.section-head-center .eyebrow{justify-content:center}
.section-head-center .eyebrow::before{display:none}

/* Topic cards */
.topic-card{
  display:block;height:100%;
  background:var(--bg-surface);
  border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;transform:translateY(0);
}
.topic-card:hover{transform:translateY(-6px);border-color:rgba(0,229,160,.45);box-shadow:0 16px 40px rgba(0,0,0,.26)}
.topic-card-media{height:142px;overflow:hidden;position:relative}
.topic-card-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 45%,rgba(11,14,20,.55));
}
.topic-card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s cubic-bezier(.23,1,.32,1)}
.topic-card:hover .topic-card-media img{transform:scale(1.05)}
.topic-card-body{padding:22px 22px 24px}
.topic-card-no{font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--text-low)}
.topic-card-body h3{font-size:20px;font-weight:700;margin:8px 0 8px;color:var(--text-high)}
.topic-card-body p{font-size:14px;color:var(--text-mid);line-height:1.7}
.topic-card-link{display:inline-flex;align-items:center;gap:8px;margin-top:16px;font-size:14px;color:var(--primary-neon);font-weight:600}
.topic-card-link i{transition:transform .2s ease}
.topic-card:hover .topic-card-link i{transform:translateX(4px)}

/* FAQ left + sidebar */
.faq-panel .cell{padding:0}
.sticky-sidebar{position:sticky;top:112px;display:flex;flex-direction:column;gap:24px}
.faq-group{
  background:var(--bg-surface);
  border:1px solid var(--line);border-radius:var(--radius-card);
  padding:clamp(22px,3vw,34px);
  margin-bottom:24px;
}
.faq-group-title{
  display:flex;align-items:center;gap:12px;
  font-size:21px;font-weight:800;margin-bottom:4px;
}
.faq-group-title::before{
  content:"";width:4px;height:24px;border-radius:4px;
  background:linear-gradient(180deg,var(--primary-neon),var(--secondary-neon));
}
.faq-group-lead{font-size:14px;color:var(--text-low);margin:8px 0 16px 16px}
.faq-item{border-bottom:1px solid var(--line);position:relative}
.faq-item:last-child{border-bottom:0}
.faq-item summary{
  display:flex;align-items:flex-start;gap:16px;
  padding:18px 0;list-style:none;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--text-high);line-height:1.5;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover,.faq-item summary:hover .fq-title{color:var(--primary-neon)}
.faq-item[open] summary{color:var(--primary-neon)}
.faq-item summary .fq-title{flex:1;min-width:0}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 18px;margin-top:6px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;
  background:var(--primary-neon);border-radius:2px;
  transform:translate(-50%,-50%);
  transition:opacity .2s ease,transform .2s ease;
}
.faq-icon::before{width:16px;height:2px}
.faq-icon::after{width:2px;height:16px}
.faq-item[open] .faq-icon::after{opacity:0;transform:translate(-50%,-50%) rotate(90deg)}
.faq-answer{padding:0 0 20px 34px}
.faq-answer p{font-size:15px;color:var(--text-mid);line-height:1.85}

/* Sidebar cards */
.side-card{
  background:var(--bg-surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px;
}
.side-card-title{
  display:flex;align-items:center;gap:10px;
  font-size:16px;font-weight:700;margin-bottom:18px;
  color:var(--text-high);
}
.side-card-title .title-bar{width:3px;height:18px;background:var(--primary-neon);border-radius:3px;box-shadow:0 0 8px rgba(0,229,160,.5)}
.side-card-text{font-size:14px;line-height:1.8;color:var(--text-mid)}
.side-tags{display:flex;flex-wrap:wrap;gap:8px}
.side-tags a{
  font-size:13px;padding:6px 13px;border:1px solid var(--line);border-radius:var(--radius-tag);
  color:var(--text-mid);background:rgba(255,255,255,.02);
}
.side-tags a:hover{color:var(--primary-neon);border-color:rgba(0,229,160,.5);background:rgba(0,229,160,.06)}
.side-links li + li{border-top:1px solid var(--line)}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 2px;font-size:14px;color:var(--text-mid);
}
.side-links a:hover{color:var(--primary-neon);padding-left:6px}
.side-links a i{font-size:12px;opacity:.6}

/* Steps */
.step-card{
  height:100%;position:relative;
  background:var(--bg-surface);
  border:1px solid var(--line);border-radius:var(--radius-card);
  padding:28px 26px;margin-top:32px;
}
.step-number{
  position:absolute;top:-18px;left:24px;
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:10px;
  background:linear-gradient(135deg,var(--primary-neon),var(--secondary-neon));
  color:#fff;font-size:15px;font-weight:800;
  box-shadow:0 0 18px rgba(0,229,160,.32);
}
.step-card h3{font-size:18px;font-weight:700;margin:18px 0 8px}
.step-card p{font-size:14px;color:var(--text-mid);line-height:1.8}
.step-card .icon-wrap{width:50px;height:50px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:rgba(0,229,160,.1);border:1px solid rgba(0,229,160,.25);color:var(--primary-neon);font-size:21px;margin-top:4px}
.step-card{overflow:hidden}
.step-card::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--gradient-cta);transform:scaleX(0);transform-origin:left;
  transition:transform .3s ease;
}
.step-card:hover::after{transform:scaleX(1)}

/* CTA */
.cta-band{background:var(--bg-elevated);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:clamp(54px,7vw,88px) 0}
.cta-box{max-width:820px;margin:0 auto;text-align:center}
.cta-box h2{font-size:clamp(25px,3.4vw,37px);font-weight:800;letter-spacing:-.02em}
.cta-box p{color:var(--text-mid);margin:18px auto 30px;max-width:660px;font-size:16px;line-height:1.85}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* Footer */
.site-footer{
  margin-top:0;
  border-top:2px solid rgba(0,229,160,.35);
  background:var(--bg-ink);
  padding:64px 0 38px;
}
.footer-main{gap:40px 0}
.footer-brand{display:flex;align-items:center;gap:12px;font-size:21px;font-weight:800}
.footer-desc{color:var(--text-mid);font-size:14px;line-height:1.8;margin:18px 0 18px;max-width:290px}
.footer-link-cta{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--primary-neon);font-size:14px;font-weight:600;
}
.footer-link-cta:hover{gap:15px;color:var(--primary-neon)}
.footer-links-row{display:flex;gap:28px}
.footer-col{flex:1;min-width:0}
.footer-col h4{
  font-size:14px;font-weight:700;letter-spacing:.05em;
  color:var(--text-high);margin-bottom:18px;display:flex;align-items:center;gap:10px;
}
.footer-col h4::before{content:"";width:3px;height:15px;background:var(--primary-neon);border-radius:3px}
.footer-col li{margin-bottom:12px}
.footer-col a{font-size:14px;color:var(--text-mid)}
.footer-col a:hover{color:var(--primary-neon);padding-left:4px}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  border-top:1px solid var(--line);padding-top:24px;margin-top:40px;
  color:var(--text-low);font-size:13px;
}
.footer-bottom a{color:var(--text-low)}
.footer-bottom a:hover{color:var(--primary-neon)}

/* Responsive */
@media (max-width: 1024px){
  .main-nav{gap:16px}
  .brand-name{font-size:17px}
}
@media (max-width: 860px){
  .site-header{height:60px}
  .header-inner{height:60px}
  body{padding-top:63px}
  .category-hero{padding-top:100px}
  .header-cta{display:none}
  .nav-toggle{display:flex;position:relative;z-index:302}
  .main-nav{
    position:fixed;top:63px;right:0;left:0;bottom:0;
    background:rgba(11,14,20,.98);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);
    flex-direction:column;gap:0;align-items:stretch;
    padding:20px 24px 32px;overflow-y:auto;
    transform:translateY(8px);opacity:0;pointer-events:none;
    transition:opacity .24s ease,transform .24s ease;
    z-index:301;
  }
  body.nav-open .main-nav{transform:none;opacity:1;pointer-events:auto}
  .nav-link{
    padding:16px 4px;font-size:16px;color:var(--text-high);
    border-bottom:1px solid rgba(255,255,255,.08);
  }
  .hack-hide{display:none}
  .footer-links-row{flex-direction:column;gap:0}
  .footer-col + .footer-col{margin-top:26px}
  .topic-card{margin-bottom:28px}
  .sticky-sidebar{position:static}
  .category-hero{padding-bottom:42px}
}
@media (max-width: 640px){
  .grid-container{padding-left:18px;padding-right:18px}
  .brand-name{font-size:16px}
  .hero-title{font-size:33px}
  .hero-actions .btn{width:calc(50% - 7px);min-width:140px}
  .section-title{font-size:25px}
  .faq-group{padding:20px 16px}
  .faq-answer{padding-left:0}
  .faq-item summary{gap:10px;font-size:15px}
  .site-footer{padding-top:44px}
  .footer-main{gap:36px 0}
}
@media (max-width: 480px){
  .brand-mark{width:10px;height:10px}
  .brand-name{letter-spacing:-.02em;font-size:15px}
  .hero-actions{flex-direction:column;width:100%}
  .hero-actions .btn{width:100%}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .topic-card-media{height:130px}
  .footer-links-row{margin-top:12px}
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}