/* roulang page: index */
:root{
  --primary:#22D3EE;
  --secondary:#8B5CF6;
  --accent:#F59E0B;
  --bg:#0B1220;
  --bg-soft:#111A2E;
  --surface:#1E293B;
  --border:rgba(148,163,184,0.16);
  --border-strong:rgba(34,211,238,0.5);
  --text:#E2E8F0;
  --text-sub:#94A3B8;
  --text-dim:#64748B;
  --success:#10B981;
  --warning:#F59E0B;
  --danger:#EF4444;
  --radius:12px;
  --radius-lg:16px;
  --shadow:0 4px 20px rgba(0,0,0,0.25);
  --shadow-hover:0 8px 32px rgba(0,0,0,0.4);
  --glow:0 0 20px rgba(34,211,238,0.35);
  --font-main:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --font-num:"Inter","DIN Alternate","PingFang SC",sans-serif;
  --container:1200px;
  --space-sec:96px;
  --space-sec-m:56px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font-main);
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .25s ease;}
button{font-family:inherit;border:none;background:none;cursor:pointer;color:inherit;}
input,textarea{font-family:inherit;}
ul,ol{list-style:none;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.section{padding:var(--space-sec) 0;position:relative;}
.section-head{
  margin-bottom:48px;
  position:relative;
}
.section-head h2{
  font-size:clamp(24px,3vw,36px);
  font-weight:700;
  line-height:1.3;
  letter-spacing:.02em;
  padding-left:16px;
  border-left:4px solid var(--primary);
  margin-bottom:12px;
}
.section-head p{
  color:var(--text-sub);
  font-size:15px;
  margin-left:20px;
}
.section-kicker{
  display:block;
  color:var(--primary);
  font-size:13px;
  letter-spacing:.12em;
  text-transform:uppercase;
  margin-bottom:12px;
  margin-left:20px;
  font-weight:600;
}
.reveal{
  opacity:0;
  transform:translateY(24px);
  transition:opacity .6s ease,transform .6s ease;
}
.reveal.visible{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}
/* ===== Header ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  height:72px;
  background:rgba(11,18,32,0.85);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:background .3s ease,border-color .3s ease;
}
.site-header.scrolled{
  background:rgba(11,18,32,0.92);
  border-bottom:1px solid var(--border);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:72px;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  font-size:20px;
  font-weight:800;
  color:var(--text);
  letter-spacing:.02em;
  white-space:nowrap;
}
.brand-mark{
  width:36px;
  height:36px;
  border-radius:10px;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  box-shadow:0 0 14px rgba(34,211,238,0.35);
}
.brand-mark svg{width:20px;height:20px;stroke:#fff;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
}
.nav-link{
  display:inline-flex;
  align-items:center;
  padding:8px 16px;
  font-size:15px;
  color:var(--text-sub);
  border-radius:8px;
  position:relative;
  min-height:44px;
  transition:color .25s ease;
}
.nav-link:hover{
  color:#fff;
}
.nav-link::after{
  content:'';
  position:absolute;
  left:16px;
  right:16px;
  bottom:4px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  opacity:0;
  transform:scaleX(.4);
  transition:opacity .25s ease,transform .25s ease;
}
.nav-link:hover::after,.nav-link.active::after{
  opacity:1;
  transform:scaleX(1);
}
.nav-link.active{
  color:#fff;
}
.nav-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  margin-left:12px;
  padding:12px 28px;
  font-size:15px;
  font-weight:700;
  color:#fff;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  border-radius:999px;
  box-shadow:var(--glow);
  transition:box-shadow .25s ease,transform .25s ease,background .25s ease;
  min-height:44px;
  white-space:nowrap;
}
.nav-cta:hover{
  transform:translateY(-2px);
  box-shadow:0 0 28px rgba(34,211,238,0.5);
}
.nav-cta:active{
  transform:translateY(1px);
}
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:44px;
  height:44px;
  padding:10px;
  border-radius:8px;
}
.nav-toggle span{
  display:block;
  height:2px;
  width:24px;
  background:var(--text);
  border-radius:2px;
  transition:transform .3s ease,opacity .3s ease;
}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.active span:nth-child(2){opacity:0;}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
/* ===== Hero ===== */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;
  align-items:center;
  background-color:var(--bg);
  overflow:hidden;
}
.hero-bg{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
}
.hero::before{
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(11,18,32,0.72) 0%,rgba(11,18,32,0.45) 40%,var(--bg) 96%);
  z-index:1;
}
.hero::after{
  content:'';
  position:absolute;
  inset:0;
  background:radial-gradient(ellipse at 70% 50%,rgba(139,92,246,0.2),transparent 60%);
  z-index:1;
}
.hero-content{
  position:relative;
  z-index:2;
  padding-top:100px;
  padding-bottom:80px;
}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 16px;
  border-radius:999px;
  background:rgba(34,211,238,0.12);
  border:1px solid rgba(34,211,238,0.3);
  color:var(--primary);
  font-size:14px;
  font-weight:600;
  margin-bottom:24px;
  letter-spacing:.04em;
}
.hero-tag::before{
  content:'';
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 8px var(--primary);
  animation:pulse 2s infinite;
}
@keyframes pulse{
  0%,100%{opacity:1;transform:scale(1);}
  50%{opacity:.5;transform:scale(.85);}
}
.hero-title{
  font-size:clamp(32px,5vw,56px);
  font-weight:800;
  line-height:1.2;
  letter-spacing:.02em;
  color:#fff;
  max-width:880px;
  margin-bottom:20px;
}
.hero-title .gradient{
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  color:transparent;
}
.hero-subtitle{
  font-size:18px;
  color:rgba(226,232,240,0.85);
  max-width:640px;
  margin-bottom:36px;
  line-height:1.8;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:16px;
  margin-bottom:36px;
}
.btn-primary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:16px 44px;
  font-size:16px;
  font-weight:700;
  color:#fff;
  background:linear-gradient(135deg,var(--accent),#F97316 60%,var(--accent));
  border-radius:999px;
  box-shadow:0 0 24px rgba(245,158,11,0.35);
  transition:transform .25s ease,box-shadow .25s ease,filter .25s ease;
  min-height:52px;
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 0 36px rgba(245,158,11,0.5);
  filter:brightness(1.05);
}
.btn-primary:active{
  transform:translateY(1px);
}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:16px 40px;
  font-size:16px;
  font-weight:600;
  color:#fff;
  background:transparent;
  border:1px solid rgba(255,255,255,0.55);
  border-radius:999px;
  transition:border-color .25s ease,background .25s ease,transform .25s ease;
  min-height:52px;
}
.btn-ghost:hover{
  border-color:#fff;
  background:rgba(255,255,255,0.08);
  transform:translateY(-2px);
}
.hero-trust{
  display:flex;
  flex-wrap:wrap;
  gap:28px;
}
.hero-trust span{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--text-sub);
}
.hero-trust .dot{
  width:8px;
  height:8px;
  border-radius:50%;
}
.dot.cyan{background:var(--primary);box-shadow:0 0 8px var(--primary);}
.dot.purple{background:var(--secondary);box-shadow:0 0 8px var(--secondary);}
.dot.amber{background:var(--accent);box-shadow:0 0 8px var(--accent);}
.hero-scroll{
  position:absolute;
  bottom:28px;
  left:50%;
  transform:translateX(-50%);
  z-index:3;
  width:28px;
  height:44px;
  border:2px solid rgba(148,163,184,0.4);
  border-radius:16px;
  display:flex;
  justify-content:center;
  padding-top:8px;
  opacity:.7;
}
.hero-scroll::before{
  content:'';
  width:4px;
  height:8px;
  border-radius:4px;
  background:var(--primary);
  animation:scrollDown 1.8s infinite;
}
@keyframes scrollDown{
  0%{transform:translateY(0);opacity:1;}
  100%{transform:translateY(14px);opacity:0;}
}
/* ===== Steps ===== */
.steps-section{
  background:var(--bg);
}
.steps-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  position:relative;
}
.steps-grid::before{
  content:'';
  position:absolute;
  top:44px;
  left:12%;
  right:12%;
  height:1px;
  background:linear-gradient(90deg,rgba(34,211,238,0.6),rgba(139,92,246,0.6));
}
.step-item{
  position:relative;
  z-index:1;
  text-align:center;
  padding:20px 16px 8px;
}
.step-num{
  width:88px;
  height:88px;
  margin:0 auto 20px;
  border-radius:50%;
  background:var(--surface);
  border:1px solid rgba(34,211,238,0.35);
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 0 20px rgba(34,211,238,0.12);
  position:relative;
}
.step-num span{
  font-family:var(--font-num);
  font-size:28px;
  font-weight:800;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.step-item h3{
  font-size:18px;
  font-weight:700;
  margin-bottom:10px;
}
.step-item p{
  font-size:14px;
  color:var(--text-sub);
  line-height:1.7;
}
/* ===== Category Cards ===== */
.cat-section{
  background:linear-gradient(180deg,var(--bg) 0%,#0E162A 100%);
}
.cat-cards{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.cat-card{
  position:relative;
  padding:32px 28px;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  overflow:hidden;
}
.cat-card::before{
  content:'';
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:3px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  opacity:0;
  transition:opacity .3s ease;
}
.cat-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(34,211,238,0.4);
}
.cat-card:hover::before{
  opacity:1;
}
.cat-card-icon{
  width:52px;
  height:52px;
  border-radius:12px;
  background:linear-gradient(135deg,rgba(34,211,238,0.15),rgba(139,92,246,0.15));
  border:1px solid rgba(34,211,238,0.25);
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:20px;
}
.cat-card-icon svg{
  width:26px;
  height:26px;
  stroke:var(--primary);
  fill:none;
  stroke-width:1.8;
  stroke-linecap:round;
  stroke-linejoin:round;
}
.cat-card:nth-child(2) .cat-card-icon svg{stroke:var(--secondary);}
.cat-card:nth-child(2) .cat-card-icon{border-color:rgba(139,92,246,0.3);background:linear-gradient(135deg,rgba(139,92,246,0.15),rgba(34,211,238,0.1));}
.cat-card:nth-child(3) .cat-card-icon svg{stroke:var(--accent);}
.cat-card:nth-child(3) .cat-card-icon{border-color:rgba(245,158,11,0.3);background:linear-gradient(135deg,rgba(245,158,11,0.12),rgba(139,92,246,0.1));}
.cat-card h3{
  font-size:20px;
  font-weight:700;
  margin-bottom:10px;
}
.cat-card p{
  font-size:14px;
  color:var(--text-sub);
  line-height:1.75;
  margin-bottom:18px;
}
.cat-card-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--primary);
  transition:gap .25s ease;
}
.cat-card-link:hover{
  gap:11px;
  color:#67e8f9;
}
/* ===== Features ===== */
.features-section{
  background:
    radial-gradient(circle at 10% 40%,rgba(139,92,246,0.12),transparent 42%),
    radial-gradient(circle at 90% 80%,rgba(34,211,238,0.08),transparent 36%),
    var(--bg);
}
.features-wrap{
  display:grid;
  grid-template-columns:1.05fr 1fr;
  gap:64px;
  align-items:center;
}
.features-visual{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-hover);
}
.features-visual img{
  width:100%;
  height:auto;
  object-fit:cover;
  border-radius:var(--radius-lg);
}
.features-visual::after{
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,rgba(34,211,238,0.12),rgba(11,18,32,0.28) 55%,rgba(139,92,246,0.18));
  border-radius:var(--radius-lg);
  pointer-events:none;
}
.features-visual-badge{
  position:absolute;
  left:20px;
  bottom:20px;
  z-index:2;
  padding:8px 18px;
  background:rgba(11,18,32,0.75);
  border:1px solid rgba(34,211,238,0.3);
  border-radius:999px;
  font-size:13px;
  color:#fff;
  backdrop-filter:blur(8px);
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.features-list{
  display:flex;
  flex-direction:column;
  gap:26px;
}
.feature-item{
  display:flex;
  gap:18px;
  padding:20px;
  background:rgba(30,41,59,0.55);
  border:1px solid var(--border);
  border-radius:var(--radius);
  transition:border-color .3s ease,background .3s ease,transform .3s ease;
}
.feature-item:hover{
  border-color:rgba(34,211,238,0.35);
  background:rgba(30,41,59,0.85);
  transform:translateX(4px);
}
.feature-icon{
  width:46px;
  height:46px;
  flex-shrink:0;
  border-radius:10px;
  background:linear-gradient(135deg,rgba(34,211,238,0.16),rgba(139,92,246,0.14));
  display:flex;
  align-items:center;
  justify-content:center;
}
.feature-icon svg{
  width:24px;
  height:24px;
  stroke:var(--primary);
  fill:none;
  stroke-width:1.8;
  stroke-linecap:round;
  stroke-linejoin:round;
}
.feature-item:nth-child(2) .feature-icon svg{stroke:var(--secondary);}
.feature-item:nth-child(3) .feature-icon svg{stroke:var(--success);}
.feature-item:nth-child(4) .feature-icon svg{stroke:var(--accent);}
.feature-item h3{
  font-size:17px;
  font-weight:700;
  margin-bottom:6px;
}
.feature-item p{
  font-size:14px;
  color:var(--text-sub);
  line-height:1.7;
}
/* ===== Compare ===== */
.compare-section{
  background:var(--bg-soft);
}
.compare-grid{
  display:grid;
  grid-template-columns:1fr 1.15fr 1fr;
  gap:20px;
  align-items:stretch;
}
.compare-card{
  padding:28px 24px;
  background:rgba(30,41,59,0.5);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
  display:flex;
  flex-direction:column;
}
.compare-card h4{
  font-size:17px;
  font-weight:700;
  margin-bottom:20px;
  padding-bottom:16px;
  border-bottom:1px solid var(--border);
}
.compare-card ul{
  display:flex;
  flex-direction:column;
  gap:12px;
  flex:1;
}
.compare-card li{
  display:flex;
  justify-content:space-between;
  align-items:center;
  font-size:14px;
  color:var(--text-sub);
  gap:8px;
}
.compare-card li span{
  color:var(--text-dim);
  flex-shrink:0;
}
.compare-card .val{
  text-align:right;
  font-weight:600;
  color:var(--text);
}
.compare-card.featured{
  position:relative;
  background:linear-gradient(180deg,rgba(30,41,59,0.9),rgba(30,41,59,0.6));
  border-color:rgba(34,211,238,0.45);
  box-shadow:0 0 40px rgba(34,211,238,0.12),var(--shadow);
  transform:scale(1.03);
  z-index:2;
}
.compare-card.featured h4{
  color:#fff;
  font-size:19px;
}
.compare-card.featured .val{
  color:var(--primary);
  font-weight:700;
}
.compare-card .rec-badge{
  position:absolute;
  top:-12px;
  right:18px;
  padding:4px 14px;
  background:linear-gradient(135deg,var(--accent),#F97316);
  color:#fff;
  font-size:12px;
  font-weight:700;
  border-radius:999px;
  letter-spacing:.05em;
  box-shadow:0 0 14px rgba(245,158,11,0.4);
}
.compare-card.gray{
  opacity:.78;
  filter:grayscale(.3);
}
.compare-card.gray:hover{
  opacity:1;
  filter:none;
}
/* ===== News ===== */
.news-section{
  background:var(--bg);
}
.news-list{
  display:flex;
  flex-direction:column;
  gap:16px;
}
.news-item{
  display:flex;
  gap:20px;
  padding:20px;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.news-item:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(34,211,238,0.35);
}
.news-cover{
  width:160px;
  height:108px;
  border-radius:8px;
  overflow:hidden;
  flex-shrink:0;
  display:block;
}
.news-cover img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .3s ease;
}
.news-item:hover .news-cover img{
  transform:scale(1.06);
}
.news-body{
  flex:1;
  display:flex;
  flex-direction:column;
  min-width:0;
}
.news-body h3{
  font-size:18px;
  font-weight:700;
  line-height:1.45;
  margin-bottom:8px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.news-body h3 a:hover{
  color:var(--primary);
}
.news-body p{
  font-size:14px;
  color:var(--text-sub);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:12px;
}
.news-meta{
  display:flex;
  align-items:center;
  gap:12px;
  margin-top:auto;
  font-size:13px;
  color:var(--text-dim);
}
.news-meta .tag{
  display:inline-flex;
  padding:3px 10px;
  background:rgba(139,92,246,0.16);
  color:#c4b5fd;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  transition:background .25s ease,color .25s ease;
}
.news-item:hover .tag{
  background:var(--primary);
  color:#082f33;
}
.news-empty{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  padding:56px 24px;
  background:var(--surface);
  border:1px dashed rgba(148,163,184,0.3);
  border-radius:var(--radius-lg);
  color:var(--text-dim);
  font-size:15px;
  gap:16px;
}
.empty-illus{
  width:72px;
  height:72px;
  border-radius:50%;
  background:linear-gradient(135deg,rgba(34,211,238,0.15),rgba(139,92,246,0.15));
  position:relative;
}
.empty-illus::before{
  content:'';
  position:absolute;
  top:18px;
  left:18px;
  width:36px;
  height:36px;
  border-radius:50%;
  border:2px solid rgba(34,211,238,0.5);
  border-right-color:transparent;
  animation:spin 3s linear infinite;
}
@keyframes spin{
  to{transform:rotate(360deg);}
}
/* ===== FAQ ===== */
.faq-section{
  background:linear-gradient(180deg,var(--bg) 0%,#0E162A 100%);
}
.faq-list{
  display:flex;
  flex-direction:column;
  gap:12px;
  max-width:900px;
}
.faq-item{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  transition:border-color .3s ease,background .3s ease;
  overflow:hidden;
}
.faq-item.open{
  border-color:rgba(34,211,238,0.4);
  background:rgba(30,41,59,0.85);
}
.faq-q{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 24px;
  cursor:pointer;
  min-height:60px;
}
.faq-q h3{
  font-size:16px;
  font-weight:600;
  line-height:1.5;
  color:var(--text);
}
.faq-icon{
  width:26px;
  height:26px;
  border-radius:50%;
  background:rgba(34,211,238,0.15);
  color:var(--primary);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:18px;
  font-weight:500;
  flex-shrink:0;
  transition:transform .3s ease,background .3s ease;
}
.faq-item.open .faq-icon{
  transform:rotate(45deg);
  background:rgba(34,211,238,0.28);
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .35s ease,padding .3s ease;
  padding:0 24px;
  font-size:15px;
  color:var(--text-sub);
  line-height:1.8;
}
.faq-item.open .faq-a{
  max-height:400px;
  padding-bottom:22px;
}
/* ===== CTA ===== */
.cta-section{
  position:relative;
  padding:96px 0;
  background:linear-gradient(135deg,#0B1220 0%,#111A2E 40%,#1A1230 100%);
  border-top:1px solid rgba(139,92,246,0.25);
  overflow:hidden;
}
.cta-section::before{
  content:'';
  position:absolute;
  top:0;
  left:50%;
  transform:translateX(-50%);
  width:720px;
  height:320px;
  background:radial-gradient(ellipse,rgba(34,211,238,0.18),transparent 65%);
  pointer-events:none;
}
.cta-inner{
  position:relative;
  z-index:1;
  text-align:center;
  max-width:760px;
  margin:0 auto;
}
.cta-inner h2{
  font-size:clamp(28px,4vw,44px);
  font-weight:800;
  line-height:1.25;
  margin-bottom:20px;
  letter-spacing:.02em;
}
.cta-inner h2 .gradient{
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.cta-inner p{
  font-size:16px;
  color:var(--text-sub);
  margin-bottom:36px;
  line-height:1.8;
}
.cta-actions{
  display:flex;
  justify-content:center;
  gap:16px;
  flex-wrap:wrap;
}
.cta-btn-main{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:18px 52px;
  font-size:17px;
  font-weight:700;
  color:#fff;
  background:linear-gradient(135deg,var(--accent),#F97316 65%,var(--accent));
  border-radius:999px;
  box-shadow:0 0 28px rgba(245,158,11,0.4);
  transition:transform .25s ease,box-shadow .25s ease,filter .25s ease;
  min-height:56px;
}
.cta-btn-main:hover{
  transform:translateY(-2px);
  box-shadow:0 0 40px rgba(245,158,11,0.55);
  filter:brightness(1.06);
}
.cta-btn-main:active{
  transform:translateY(1px);
}
.cta-aux{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:18px 36px;
  font-size:15px;
  font-weight:600;
  color:#fff;
  background:transparent;
  border:1px solid rgba(148,163,184,0.5);
  border-radius:999px;
  min-height:56px;
  transition:border-color .25s ease,background .25s ease;
}
.cta-aux:hover{
  border-color:var(--primary);
  background:rgba(34,211,238,0.1);
}
.cta-trust{
  display:flex;
  justify-content:center;
  flex-wrap:wrap;
  gap:22px;
  margin-top:36px;
  font-size:13px;
  color:var(--text-dim);
}
.cta-trust span{
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.cta-trust span::before{
  content:'✓';
  color:var(--success);
  font-weight:700;
}
/* ===== Footer ===== */
.site-footer{
  background:#0A0F1C;
  border-top:1px solid var(--border);
  padding-top:64px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr .8fr 1fr;
  gap:48px;
  padding-bottom:48px;
}
.footer-brand .brand{
  margin-bottom:16px;
}
.footer-brand p{
  font-size:14px;
  color:var(--text-sub);
  line-height:1.8;
  margin-bottom:20px;
  max-width:340px;
}
.footer-badges{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}
.footer-badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border:1px solid var(--border);
  border-radius:999px;
  font-size:12px;
  color:var(--text-sub);
}
.footer-badge::before{
  content:'';
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--success);
}
.footer-col h4{
  font-size:15px;
  font-weight:700;
  color:#fff;
  margin-bottom:20px;
  letter-spacing:.04em;
}
.footer-col ul{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.footer-col a{
  font-size:14px;
  color:var(--text-sub);
  display:inline-flex;
  align-items:center;
  min-height:36px;
  transition:color .25s ease,padding-left .25s ease;
}
.footer-col a:hover{
  color:var(--primary);
  padding-left:6px;
}
.footer-contact li{
  display:flex;
  gap:10px;
  font-size:14px;
  color:var(--text-sub);
  line-height:1.7;
  align-items:flex-start;
}
.footer-contact li span:first-child{
  color:var(--text-dim);
  flex-shrink:0;
}
.footer-bottom{
  border-top:1px solid var(--border);
  padding:22px 0;
  text-align:center;
  font-size:13px;
  color:var(--text-dim);
}
.footer-bottom a{
  color:var(--text-dim);
}
.footer-bottom a:hover{
  color:var(--primary);
}
/* ===== Scroll Top ===== */
.scroll-top{
  position:fixed;
  right:24px;
  bottom:24px;
  width:44px;
  height:44px;
  border-radius:12px;
  background:var(--surface);
  border:1px solid rgba(34,211,238,0.3);
  color:var(--primary);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:18px;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .3s ease,visibility .3s ease,transform .3s ease,background .3s ease;
  z-index:50;
}
.scroll-top.show{
  opacity:1;
  visibility:visible;
  transform:none;
}
.scroll-top:hover{
  background:rgba(34,211,238,0.15);
}
/* ===== Responsive ===== */
@media (max-width:1023px){
  .section{
    padding:var(--space-sec-m) 0;
  }
  .steps-grid{
    grid-template-columns:repeat(2,1fr);
    gap:16px;
  }
  .steps-grid::before{
    display:none;
  }
  .features-wrap{
    grid-template-columns:1fr;
    gap:40px;
  }
  .compare-grid{
    grid-template-columns:1fr;
    gap:16px;
  }
  .compare-card.featured{
    transform:none;
    order:-1;
  }
  .cat-cards{
    grid-template-columns:repeat(3,1fr);
    gap:16px;
  }
  .cat-card{
    padding:24px 20px;
  }
  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:36px;
  }
}
@media (max-width:767px){
  .container{
    padding:0 16px;
  }
  .header-inner{
    gap:12px;
  }
  .brand{
    font-size:17px;
    gap:8px;
  }
  .brand-mark{
    width:32px;
    height:32px;
    border-radius:9px;
  }
  .nav-toggle{
    display:flex;
  }
  .main-nav{
    position:fixed;
    top:72px;
    right:0;
    width:min(320px,84vw);
    height:calc(100vh - 72px);
    background:rgba(11,18,32,0.97);
    backdrop-filter:blur(16px);
    flex-direction:column;
    padding:24px;
    gap:4px;
    box-shadow:-8px 0 32px rgba(0,0,0,0.4);
    transform:translateX(105%);
    transition:transform .35s ease;
    border-left:1px solid var(--border);
    align-items:stretch;
    overflow-y:auto;
  }
  .main-nav.open{
    transform:translateX(0);
  }
  .nav-link{
    padding:14px 12px;
    font-size:16px;
    border-radius:10px;
    justify-content:space-between;
  }
  .nav-link:hover{
    background:rgba(148,163,184,0.08);
  }
  .nav-link::after{
    left:12px;
    right:auto;
    width:3px;
    height:auto;
    top:12px;
    bottom:12px;
    border-radius:3px;
    transform:scaleY(.4);
  }
  .nav-link:hover::after,.nav-link.active::after{
    transform:scaleY(1);
  }
  .nav-cta{
    margin:20px 0 0;
    justify-content:center;
    width:100%;
  }
  .hero{
    min-height:100svh;
  }
  .hero-content{
    padding-top:80px;
    padding-bottom:80px;
  }
  .hero-title{
    font-size:clamp(30px,8vw,38px);
  }
  .hero-subtitle{
    font-size:16px;
  }
  .hero-actions{
    flex-direction:column;
    width:100%;
  }
  .btn-primary,.btn-ghost{
    width:100%;
  }
  .hero-trust{
    gap:16px;
  }
  .steps-grid{
    grid-template-columns:1fr;
    gap:12px;
  }
  .step-item{
    text-align:left;
    display:flex;
    gap:18px;
    align-items:flex-start;
    padding:16px;
  }
  .step-num{
    width:56px;
    height:56px;
    margin:0;
    flex-shrink:0;
  }
  .step-num span{
    font-size:20px;
  }
  .step-item h3{
    margin-bottom:6px;
  }
  .cat-cards{
    grid-template-columns:1fr;
  }
  .features-wrap{
    gap:28px;
  }
  .feature-item{
    padding:16px;
    gap:14px;
    flex-wrap:wrap;
  }
  .compare-card{
    padding:22px 18px;
  }
  .news-item{
    flex-direction:column;
    gap:14px;
    padding:16px;
  }
  .news-cover{
    width:100%;
    height:180px;
  }
  .news-body h3{
    white-space:normal;
  }
  .news-meta{
    flex-wrap:wrap;
  }
  .faq-q{
    padding:16px;
  }
  .faq-a{
    padding:0 16px;
  }
  .faq-item.open .faq-a{
    padding-bottom:16px;
  }
  .cta-section{
    padding:64px 0;
  }
  .cta-actions{
    flex-direction:column;
    width:100%;
  }
  .cta-btn-main,.cta-aux{
    width:100%;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:32px;
  }
  .footer-brand p{
    max-width:100%;
  }
  .scroll-top{
    right:16px;
    bottom:16px;
  }
}
@media (max-width:520px){
  .news-cover{
    height:160px;
  }
  .step-item{
    flex-direction:column;
    text-align:center;
    align-items:center;
  }
  .step-num{
    margin-bottom:12px;
  }
  .feature-item{
    flex-direction:column;
    text-align:left;
  }
}

/* roulang page: category1 */
:root {
            --primary: #22D3EE;
            --secondary: #8B5CF6;
            --accent: #F59E0B;
            --bg: #0B1220;
            --surface: #1E293B;
            --surface-2: #263449;
            --border: rgba(148, 163, 184, 0.16);
            --border-hover: rgba(34, 211, 238, 0.5);
            --text: #E2E8F0;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --success: #10B981;
            --warning: #F59E0B;
            --danger: #EF4444;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-btn: 999px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.4);
            --container: 1200px;
            --transition: 0.25s ease;
            --header-h: 72px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Inter", sans-serif;
            background: var(--bg);
            color: var(--text);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
            border: 0;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: #fff;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        ul {
            list-style: none;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: var(--header-h);
            background: rgba(11, 18, 32, 0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid transparent;
            transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            border-color: var(--border);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.01em;
            white-space: nowrap;
        }
        .brand:hover {
            color: var(--primary);
        }
        .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            flex-shrink: 0;
            box-shadow: 0 0 18px rgba(34, 211, 238, 0.35);
        }
        .brand-mark svg {
            width: 20px;
            height: 20px;
            stroke: #fff;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            position: relative;
            transition: color var(--transition), background var(--transition);
        }
        .nav-link::after {
            content: "";
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            box-shadow: 0 0 8px rgba(34, 211, 238, 0.6);
            transition: width var(--transition);
        }
        .nav-link:hover {
            color: #fff;
            background: rgba(148, 163, 184, 0.08);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 20px;
        }
        .nav-link.active {
            color: #fff;
        }
        .nav-link.active::after {
            width: 20px;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 28px;
            margin-left: 12px;
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-btn);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.35);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 32px rgba(34, 211, 238, 0.55);
            color: #fff;
        }
        .nav-cta:active {
            transform: translateY(0);
            box-shadow: 0 0 14px rgba(34, 211, 238, 0.3);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            padding: 8px;
            border-radius: 8px;
            background: rgba(148, 163, 184, 0.08);
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .page-banner {
            position: relative;
            padding: calc(var(--header-h) + 64px) 0 64px;
            background: linear-gradient(135deg, rgba(11, 18, 32, 0.92), rgba(30, 41, 59, 0.86)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            border-bottom: 1px solid var(--border);
            overflow: hidden;
        }
        .page-banner::before {
            content: "";
            position: absolute;
            top: -120px;
            right: -120px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.25), transparent 70%);
            pointer-events: none;
        }
        .page-banner .container {
            display: grid;
            grid-template-columns: 1fr 400px;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 2;
        }
        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.3);
            border-radius: var(--radius-btn);
            margin-bottom: 16px;
        }
        .banner-tag::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 8px var(--primary);
        }
        .page-banner h1 {
            font-size: clamp(32px, 5vw, 52px);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: 0.02em;
            color: #fff;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff 30%, var(--primary) 70%, var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .banner-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 540px;
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .banner-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 32px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 36px;
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-btn);
            box-shadow: 0 0 24px rgba(34, 211, 238, 0.35);
            transition: all var(--transition);
            min-height: 48px;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 36px rgba(34, 211, 238, 0.55);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.4);
            border-radius: var(--radius-btn);
            transition: all var(--transition);
            min-height: 48px;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: #fff;
            color: #fff;
        }
        .banner-trust {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .trust-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            font-size: 13px;
            color: var(--text-secondary);
            background: rgba(148, 163, 184, 0.1);
            border-radius: var(--radius-btn);
        }
        .trust-badge svg {
            width: 14px;
            height: 14px;
            stroke: var(--primary);
        }
        .banner-image {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
            border: 1px solid var(--border);
        }
        .banner-image img {
            width: 100%;
            height: 340px;
            object-fit: cover;
        }
        .banner-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(11, 18, 32, 0.7));
        }
        .section {
            padding: 96px 0;
        }
        .section-head {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            margin-bottom: 48px;
        }
        .section-head-bar {
            width: 4px;
            height: 32px;
            border-radius: 4px;
            background: linear-gradient(180deg, var(--primary), var(--secondary));
            flex-shrink: 0;
            margin-top: 6px;
        }
        .section-head h2 {
            font-size: clamp(24px, 3vw, 36px);
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
            letter-spacing: 0.01em;
        }
        .section-head .sub {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 400;
            margin-top: 4px;
            letter-spacing: 0.04em;
        }
        .steps-section {
            padding: 96px 0;
            position: relative;
        }
        .steps-section::before {
            content: "";
            position: absolute;
            top: 40%;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.3), rgba(139, 92, 246, 0.3), transparent);
        }
        .steps-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .step-item {
            position: relative;
            padding: 32px 24px 24px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            text-align: center;
            transition: all var(--transition);
            overflow: hidden;
        }
        .step-item:hover {
            transform: translateY(-4px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
        }
        .step-num {
            position: absolute;
            top: 16px;
            right: 16px;
            font-size: 32px;
            font-weight: 800;
            color: rgba(148, 163, 184, 0.12);
            line-height: 1;
        }
        .step-icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 16px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(34, 211, 238, 0.15), rgba(139, 92, 246, 0.15));
            border: 1px solid rgba(34, 211, 238, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .step-icon svg {
            width: 26px;
            height: 26px;
            stroke: var(--primary);
        }
        .step-item h3 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .methods-section {
            padding: 96px 0;
            background: linear-gradient(180deg, transparent, rgba(139, 92, 246, 0.06), transparent);
        }
        .methods-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .method-card {
            padding: 28px 24px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            transition: all var(--transition);
        }
        .method-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
        }
        .method-card .icon-wrap {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(34, 211, 238, 0.12), rgba(139, 92, 246, 0.12));
            margin-bottom: 16px;
        }
        .method-card .icon-wrap svg {
            width: 24px;
            height: 24px;
            stroke: var(--primary);
        }
        .method-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
        }
        .method-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
        }
        .method-card .tag {
            display: inline-block;
            margin-top: 12px;
            padding: 3px 12px;
            font-size: 12px;
            font-weight: 600;
            color: var(--secondary);
            background: rgba(139, 92, 246, 0.1);
            border: 1px solid rgba(139, 92, 246, 0.25);
            border-radius: var(--radius-btn);
        }
        .advantages-section {
            padding: 96px 0;
            position: relative;
            overflow: hidden;
        }
        .advantages-section::before {
            content: "";
            position: absolute;
            bottom: 0;
            left: -200px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(34, 211, 238, 0.08), transparent 70%);
            pointer-events: none;
        }
        .adv-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .adv-media {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
            position: relative;
        }
        .adv-media img {
            width: 100%;
            height: 380px;
            object-fit: cover;
        }
        .adv-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(200deg, transparent 50%, rgba(11, 18, 32, 0.6));
        }
        .adv-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .adv-item {
            display: flex;
            gap: 18px;
            padding: 20px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: all var(--transition);
        }
        .adv-item:hover {
            border-color: var(--border-hover);
            box-shadow: 0 4px 20px rgba(34, 211, 238, 0.08);
        }
        .adv-item .adv-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(34, 211, 238, 0.12), rgba(139, 92, 246, 0.12));
            border: 1px solid rgba(34, 211, 238, 0.2);
        }
        .adv-item .adv-icon svg {
            width: 20px;
            height: 20px;
            stroke: var(--primary);
        }
        .adv-item h3 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 4px;
        }
        .adv-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .compare-section {
            padding: 96px 0;
            background: var(--surface);
        }
        .compare-grid {
            display: grid;
            grid-template-columns: 1fr 1.4fr 1fr;
            gap: 24px;
            align-items: stretch;
        }
        .compare-card {
            padding: 32px 24px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            text-align: center;
            display: flex;
            flex-direction: column;
            justify-content: center;
            transition: all var(--transition);
        }
        .compare-card.featured {
            background: linear-gradient(180deg, rgba(34, 211, 238, 0.08), rgba(139, 92, 246, 0.06));
            border-color: rgba(34, 211, 238, 0.4);
            box-shadow: 0 0 30px rgba(34, 211, 238, 0.12);
            padding: 40px 28px;
            position: relative;
        }
        .compare-card.featured .recommend-tag {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            padding: 4px 16px;
            font-size: 13px;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-btn);
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(34, 211, 238, 0.3);
        }
        .compare-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .compare-card ul {
            text-align: left;
            margin: 0 auto;
            width: 100%;
        }
        .compare-card ul li {
            padding: 8px 0;
            font-size: 14px;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .compare-card ul li:last-child {
            border-bottom: none;
        }
        .compare-card ul li::before {
            content: "✓";
            color: var(--success);
            font-weight: 700;
            flex-shrink: 0;
        }
        .compare-card.dim ul li::before {
            content: "✕";
            color: var(--text-muted);
        }
        .compare-card.dim ul li {
            color: var(--text-muted);
        }
        .compare-card.dim h3 {
            color: var(--text-secondary);
        }
        .news-section {
            padding: 96px 0;
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-card {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 16px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: all var(--transition);
        }
        .news-card:hover {
            transform: translateY(-2px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
        }
        .news-cover {
            width: 120px;
            height: 80px;
            border-radius: 8px;
            object-fit: cover;
            flex-shrink: 0;
            background: var(--surface-2);
        }
        .news-info {
            flex: 1;
            min-width: 0;
        }
        .news-info h3 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 6px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .news-info p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 8px;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .news-cat {
            padding: 2px 10px;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.2);
            border-radius: var(--radius-btn);
        }
        .news-empty {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 48px 24px;
            background: var(--surface);
            border: 1px dashed var(--border);
            border-radius: var(--radius-lg);
            color: var(--text-muted);
            font-size: 14px;
            gap: 12px;
        }
        .news-empty svg {
            width: 40px;
            height: 40px;
            stroke: var(--text-muted);
        }
        .faq-section {
            padding: 96px 0;
            background: linear-gradient(180deg, transparent, rgba(139, 92, 246, 0.05), transparent);
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item.open {
            border-color: rgba(34, 211, 238, 0.4);
            box-shadow: 0 4px 20px rgba(34, 211, 238, 0.06);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(148, 163, 184, 0.04);
        }
        .faq-toggle {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(34, 211, 238, 0.12);
            border: 1px solid rgba(34, 211, 238, 0.3);
            flex-shrink: 0;
            transition: transform var(--transition), background var(--transition);
        }
        .faq-toggle svg {
            width: 14px;
            height: 14px;
            stroke: var(--primary);
            transition: transform var(--transition);
        }
        .faq-item.open .faq-toggle {
            transform: rotate(45deg);
            background: rgba(34, 211, 238, 0.2);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding var(--transition);
            padding: 0 24px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
        }
        .faq-item.open .faq-answer {
            max-height: 240px;
            padding: 0 24px 20px;
        }
        .cta-section {
            padding: 96px 0;
            position: relative;
        }
        .cta-box {
            position: relative;
            padding: 72px 48px;
            border-radius: var(--radius-lg);
            text-align: center;
            background: linear-gradient(135deg, rgba(34, 211, 238, 0.1), rgba(139, 92, 246, 0.12)), url('/assets/images/backpic/back-2.png') center/cover;
            border: 1px solid rgba(34, 211, 238, 0.25);
            overflow: hidden;
        }
        .cta-box::before {
            content: "";
            position: absolute;
            top: -80px;
            left: -80px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(34, 211, 238, 0.2), transparent 70%);
            pointer-events: none;
        }
        .cta-box::after {
            content: "";
            position: absolute;
            bottom: -80px;
            right: -80px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.2), transparent 70%);
            pointer-events: none;
        }
        .cta-box h2 {
            font-size: clamp(24px, 3.5vw, 40px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
            letter-spacing: 0.01em;
        }
        .cta-box p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 32px;
            position: relative;
            z-index: 1;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .site-footer {
            background: #0A0F1C;
            border-top: 1px solid var(--border);
            padding: 64px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 48px;
        }
        .footer-brand .brand {
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 360px;
            margin-bottom: 20px;
        }
        .footer-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-badge {
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            color: var(--text-secondary);
            background: rgba(148, 163, 184, 0.08);
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-col ul.footer-contact li {
            font-size: 14px;
            color: var(--text-secondary);
            display: flex;
            justify-content: space-between;
            gap: 16px;
            padding: 8px 0;
            border-bottom: 1px solid var(--border);
        }
        .footer-col ul.footer-contact li:last-child {
            border-bottom: none;
        }
        .footer-col ul.footer-contact li span:first-child {
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 24px;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-secondary);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            z-index: 99;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            box-shadow: var(--shadow);
            opacity: 0;
            visibility: hidden;
            transform: translateY(16px);
            transition: all var(--transition);
        }
        .back-top.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .back-top svg {
            width: 18px;
            height: 18px;
            stroke: currentColor;
        }
        @media (max-width: 1024px) {
            .page-banner .container {
                grid-template-columns: 1fr 320px;
                gap: 32px;
            }
            .banner-image img {
                height: 280px;
            }
            .steps-timeline {
                grid-template-columns: repeat(2, 1fr);
            }
            .methods-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .compare-grid {
                grid-template-columns: 1fr;
                max-width: 460px;
                margin: 0 auto;
            }
            .compare-card.featured {
                order: -1;
            }
            .adv-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .adv-media img {
                height: 300px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .site-header {
                height: 64px;
            }
            .header-inner {
                height: 64px;
            }
            .brand span {
                font-size: 17px;
            }
            .brand-mark {
                width: 32px;
                height: 32px;
            }
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                position: fixed;
                top: 64px;
                right: 0;
                bottom: 0;
                width: min(320px, 85vw);
                background: rgba(11, 18, 32, 0.96);
                backdrop-filter: blur(12px);
                flex-direction: column;
                align-items: stretch;
                padding: 20px;
                gap: 8px;
                transform: translateX(100%);
                transition: transform 0.3s ease;
                border-left: 1px solid var(--border);
            }
            .main-nav.open {
                transform: translateX(0);
            }
            .nav-link {
                width: 100%;
                justify-content: flex-start;
                padding: 0 16px;
                font-size: 16px;
                height: 48px;
                border-radius: 10px;
            }
            .nav-link::after {
                display: none;
            }
            .nav-cta {
                width: 100%;
                margin: 12px 0 0;
                height: 48px;
                border-radius: 999px;
            }
            .page-banner {
                padding: calc(64px + 40px) 0 40px;
            }
            .page-banner .container {
                grid-template-columns: 1fr;
            }
            .banner-image {
                display: none;
            }
            .page-banner h1 {
                font-size: 32px;
            }
            .section {
                padding: 56px 0;
            }
            .section-head {
                margin-bottom: 32px;
            }
            .steps-section {
                padding: 56px 0;
            }
            .steps-section::before {
                display: none;
            }
            .steps-timeline {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .step-item {
                display: flex;
                align-items: center;
                text-align: left;
                gap: 16px;
                padding: 20px;
            }
            .step-num {
                display: none;
            }
            .step-icon {
                margin: 0;
                flex-shrink: 0;
            }
            .methods-section,
            .advantages-section,
            .compare-section,
            .news-section,
            .faq-section,
            .cta-section {
                padding: 56px 0;
            }
            .methods-grid {
                grid-template-columns: 1fr;
            }
            .adv-media img {
                height: 220px;
            }
            .news-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .news-cover {
                width: 100%;
                height: 160px;
            }
            .news-info h3 {
                white-space: normal;
            }
            .cta-box {
                padding: 48px 24px;
            }
            .cta-actions {
                flex-direction: column;
            }
            .cta-actions .btn-primary,
            .cta-actions .btn-outline {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-contact li {
                flex-direction: column;
                gap: 4px;
            }
            .back-top {
                bottom: 20px;
                right: 20px;
            }
        }
        @media (max-width: 480px) {
            .brand {
                font-size: 16px;
            }
            .brand-mark {
                width: 28px;
                height: 28px;
            }
            .banner-actions {
                flex-direction: column;
                width: 100%;
            }
            .banner-actions .btn-primary,
            .banner-actions .btn-outline {
                width: 100%;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 14px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
  --primary: #22D3EE;
  --secondary: #8B5CF6;
  --accent: #F59E0B;
  --bg: #0B1220;
  --bg-soft: #0F172A;
  --surface: #1E293B;
  --surface-2: #1A2438;
  --border: rgba(148, 163, 184, 0.16);
  --border-hover: rgba(34, 211, 238, 0.5);
  --text: #E2E8F0;
  --text-2: #94A3B8;
  --text-3: #64748B;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.4);
  --glow-primary: 0 0 20px rgba(34, 211, 238, 0.35);
  --space-section: 96px;
  --space-section-mobile: 56px;
  --container: 1200px;
  --font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --font-num: 'Inter', 'DIN Alternate', system-ui, sans-serif;
  --transition: 0.25s ease;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: #7DE8F5;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
}

/* ===== Container ===== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 72px;
  background: rgba(11, 18, 32, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
  background: rgba(11, 18, 32, 0.96);
  border-bottom-color: var(--border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.brand:hover {
  color: #fff;
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  flex-shrink: 0;
  box-shadow: var(--glow-primary);
}

.brand-mark svg {
  width: 20px;
  height: 20px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--text-2);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition), background var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  opacity: 0;
  transform: scaleX(0.4);
  transition: opacity var(--transition), transform var(--transition);
}

.nav-link:hover {
  color: #fff;
  background: rgba(148, 163, 184, 0.06);
}

.nav-link:hover::after,
.nav-link.active::after {
  opacity: 1;
  transform: scaleX(1);
}

.nav-link.active {
  color: #fff;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-pill);
  box-shadow: var(--glow-primary);
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
  white-space: nowrap;
  margin-left: 12px;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(34, 211, 238, 0.55);
  color: #fff;
  filter: brightness(1.08);
}

.nav-cta:active {
  transform: translateY(0);
  box-shadow: var(--glow-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.nav-toggle:hover {
  background: rgba(148, 163, 184, 0.08);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Page Banner ===== */
.page-banner {
  position: relative;
  padding: 140px 0 64px;
  background-size: cover;
  background-position: center;
  background-color: var(--bg-soft);
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 18, 32, 0.72) 0%, rgba(11, 18, 32, 0.88) 60%, var(--bg) 100%);
}

.page-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 20%, rgba(139, 92, 246, 0.14), transparent 60%);
  pointer-events: none;
}

.banner-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--text-3);
}

.breadcrumb a {
  color: var(--text-2);
  transition: color var(--transition);
}

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

.breadcrumb .breadcrumb-sep {
  color: var(--text-3);
  opacity: 0.6;
}

.breadcrumb .breadcrumb-current {
  color: var(--text-2);
  max-width: 420px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.page-title {
  font-size: clamp(30px, 4.5vw, 44px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  background: linear-gradient(120deg, #fff 0%, var(--primary) 50%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-wrap: balance;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px 28px;
  font-size: 14px;
  color: var(--text-2);
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.meta-item svg {
  width: 16px;
  height: 16px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

/* ===== Article Main ===== */
.article-main {
  padding: 48px 0 32px;
}

.article-content {
  max-width: 760px;
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 5vw, 56px);
  box-shadow: var(--shadow);
}

/* Article Typography */
.article-content p {
  margin-bottom: 24px;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(226, 232, 240, 0.92);
}

.article-content > *:last-child {
  margin-bottom: 0;
}

.article-content h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  margin: 44px 0 18px;
  padding-left: 16px;
  border-left: 4px solid var(--primary);
  line-height: 1.35;
}

.article-content h3 {
  font-size: 21px;
  font-weight: 600;
  color: var(--text);
  margin: 32px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  line-height: 1.4;
}

.article-content h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-2);
  margin: 24px 0 12px;
}

.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.article-content a:hover {
  color: #7DE8F5;
}

.article-content blockquote {
  margin: 28px 0;
  padding: 18px 22px;
  background: rgba(148, 163, 184, 0.07);
  border-left: 4px solid var(--secondary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-2);
  font-style: normal;
}

.article-content blockquote p {
  margin-bottom: 8px;
  color: var(--text-2);
}

.article-content blockquote p:last-child {
  margin-bottom: 0;
}

.article-content ul,
.article-content ol {
  margin: 20px 0 24px;
  padding-left: 6px;
}

.article-content ul li,
.article-content ol li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 12px;
  font-size: 16px;
  line-height: 1.7;
  color: rgba(226, 232, 240, 0.9);
}

.article-content ul li::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px rgba(34, 211, 238, 0.4);
}

.article-content ol {
  counter-reset: item;
}

.article-content ol li {
  counter-increment: item;
  padding-left: 36px;
}

.article-content ol li::before {
  content: counter(item);
  position: absolute;
  left: 0;
  top: 2px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  font-family: var(--font-num);
  color: var(--primary);
  background: rgba(34, 211, 238, 0.1);
  border-radius: 50%;
  border: 1px solid rgba(34, 211, 238, 0.3);
}

.article-content img {
  border-radius: var(--radius);
  margin: 28px auto;
  box-shadow: var(--shadow);
}

.article-content figure {
  margin: 28px 0;
}

.article-content figcaption {
  text-align: center;
  font-size: 13px;
  color: var(--text-3);
  margin-top: 12px;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 15px;
}

.article-content th,
.article-content td {
  padding: 14px 16px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.article-content th {
  background: rgba(148, 163, 184, 0.09);
  font-weight: 600;
  color: var(--text);
}

.article-content tr:nth-child(even) td {
  background: rgba(148, 163, 184, 0.03);
}

.article-content pre {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.7;
  margin: 28px 0;
}

.article-content code {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 14px;
  background: rgba(139, 92, 246, 0.12);
  color: #C4B5FD;
  padding: 2px 6px;
  border-radius: 4px;
}

.article-content pre code {
  background: none;
  color: var(--text-2);
  padding: 0;
}

/* ===== Not Found ===== */
.not-found {
  text-align: center;
  padding: 60px 24px;
}

.not-found-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.not-found-icon svg {
  width: 32px;
  height: 32px;
  stroke: var(--danger);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.not-found h2 {
  font-size: 24px;
  margin-bottom: 12px;
}

.not-found p {
  color: var(--text-2);
  margin-bottom: 28px;
}

/* ===== Article Tools ===== */
.article-tools {
  padding: 16px 0 8px;
}

.article-tools-inner {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--text-2);
  background: rgba(139, 92, 246, 0.08);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: var(--radius-pill);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.tag:hover {
  color: var(--text);
  border-color: rgba(34, 211, 238, 0.4);
  background: rgba(34, 211, 238, 0.06);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
  white-space: nowrap;
}

.btn svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-2);
}

.btn-ghost:hover {
  border-color: var(--border-hover);
  color: var(--text);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  box-shadow: var(--glow-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(34, 211, 238, 0.5);
  color: #fff;
}

.btn-lg {
  padding: 16px 44px;
  font-size: 16px;
  border-radius: var(--radius-pill);
}

/* ===== Related Section ===== */
.related-section {
  padding: var(--space-section) 0;
  position: relative;
}

.related-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 70%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.3), var(--secondary), rgba(34, 211, 238, 0.3), transparent);
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 40px;
}

.section-head h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  padding-left: 16px;
  border-left: 4px solid var(--primary);
  line-height: 1.3;
}

.section-en {
  font-family: var(--font-num);
  font-size: 14px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 500;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.related-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  min-height: 110px;
}

.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-hover);
}

.related-cover {
  width: 96px;
  height: 72px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
}

.related-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

.related-card:hover .related-cover img {
  transform: scale(1.05);
}

.related-info {
  min-width: 0;
  flex: 1;
}

.related-info h3 {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-meta {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  color: var(--text-3);
  gap: 6px;
}

.related-meta .dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--primary);
  flex-shrink: 0;
}

/* ===== Comments Section ===== */
.comments-section {
  padding: 32px 0 var(--space-section);
}

.comments-section .section-head {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.comment-empty {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  padding: 48px 24px;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
}

.comment-empty-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(148, 163, 184, 0.08);
}

.comment-empty-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--text-3);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.comment-empty p {
  color: var(--text-2);
  font-size: 15px;
}

/* ===== CTA Section ===== */
.cta-section {
  padding: 0 0 var(--space-section);
}

.cta-box {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 56px 64px;
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.95), rgba(15, 23, 42, 0.98));
  border: 1px solid rgba(34, 211, 238, 0.25);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 0 60px rgba(34, 211, 238, 0.08);
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.15), transparent 70%);
  pointer-events: none;
}

.cta-box::after {
  content: '';
  position: absolute;
  bottom: -50%;
  right: 10%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.12), transparent 70%);
  pointer-events: none;
}

.cta-content {
  flex: 1;
  text-align: center;
  position: relative;
  z-index: 1;
}

.cta-content h2 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  margin-bottom: 10px;
  background: linear-gradient(120deg, var(--text), var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta-content p {
  color: var(--text-2);
  font-size: 15px;
  margin-bottom: 28px;
  letter-spacing: 0.04em;
}

.cta-info {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-width: 100px;
}

.cta-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  background: rgba(148, 163, 184, 0.08);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

.cta-badge svg {
  width: 16px;
  height: 16px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.cta-info-right {
  align-items: flex-end;
}

/* ===== Footer ===== */
.site-footer {
  background: #081020;
  border-top: 1px solid var(--border);
  padding: 64px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .brand {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-3);
  margin-bottom: 20px;
  max-width: 360px;
}

.footer-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--text-2);
  background: rgba(148, 163, 184, 0.06);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul a {
  color: var(--text-2);
  font-size: 14px;
  transition: color var(--transition);
}

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

.footer-contact li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 14px;
  color: var(--text-2);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.footer-contact li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.footer-contact span:first-child {
  color: var(--text-3);
  flex-shrink: 0;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-3);
}

.footer-bottom a {
  color: var(--text-2);
}

.footer-bottom a:hover {
  color: var(--primary);
}

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  box-shadow: var(--shadow);
  color: var(--text-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition), background var(--transition), box-shadow var(--transition), border-color var(--transition);
  z-index: 999;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--surface-2);
  border-color: var(--border-hover);
  color: var(--primary);
  box-shadow: var(--shadow-hover);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .cta-box {
    padding: 48px 40px;
    flex-direction: column;
    text-align: center;
  }

  .cta-info-right {
    align-items: flex-end;
  }

  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .site-header {
    height: 64px;
  }

  .brand {
    font-size: 18px;
  }

  .brand-mark {
    width: 32px;
    height: 32px;
    border-radius: 8px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 64px;
    right: 0;
    bottom: 0;
    width: min(320px, 85vw);
    flex-direction: column;
    align-items: stretch;
    background: rgba(11, 18, 32, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-left: 1px solid var(--border);
    padding: 24px;
    gap: 4px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 999;
    overflow-y: auto;
  }

  .main-nav.open {
    transform: translateX(0);
  }

  .nav-link {
    min-height: 48px;
    padding: 12px 16px;
    font-size: 16px;
    border-radius: var(--radius-sm);
  }

  .nav-link::after {
    left: 16px;
    right: auto;
    width: 28px;
  }

  .nav-cta {
    margin: 16px 0 0;
    width: 100%;
    min-height: 52px;
    justify-content: center;
  }

  .page-banner {
    padding: 120px 0 48px;
  }

  .article-meta {
    flex-direction: column;
    gap: 8px;
  }

  .article-content {
    padding: 24px 20px;
  }

  .article-content p {
    font-size: 15px;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .cta-box {
    padding: 40px 24px;
  }

  .cta-info {
    flex-direction: row;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .cta-info-right {
    justify-content: center;
  }

  .cta-box {
    gap: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .footer-brand p {
    max-width: 100%;
  }

  .footer-contact li {
    flex-direction: column;
    gap: 4px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 520px) {
  :root {
    --space-section: 56px;
  }

  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .brand {
    font-size: 16px;
    gap: 8px;
  }

  .brand-mark {
    width: 28px;
    height: 28px;
  }

  .brand-mark svg {
    width: 16px;
    height: 16px;
  }

  .page-title {
    font-size: 28px;
  }

  .article-tools-inner {
    flex-direction: column;
    align-items: stretch;
  }

  .article-tools-inner .btn {
    width: 100%;
  }

  .article-tags {
    justify-content: center;
  }

  .related-card {
    min-height: 96px;
  }

  .cta-content h2 {
    font-size: 22px;
  }

  .btn-lg {
    width: 100%;
    padding: 14px 24px;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 28px;
  }
}

/* ===== Focus States ===== */
a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(34, 211, 238, 0.5);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ===== Selection ===== */
::selection {
  background: rgba(34, 211, 238, 0.3);
  color: #fff;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--surface);
  border-radius: 5px;
  border: 2px solid var(--bg);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-3);
}

/* roulang page: category2 */
:root {
  --primary: #22D3EE;
  --secondary: #8B5CF6;
  --accent: #F59E0B;
  --bg: #0B1220;
  --surface: #1E293B;
  --border: rgba(148, 163, 184, 0.16);
  --text: #E2E8F0;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --radius: 12px;
  --radius-lg: 16px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.4);
  --container: 1200px;
  --transition: 0.25s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: #67e8f9; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: 72px;
  background: rgba(11, 18, 32, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.site-header.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: var(--text); letter-spacing: 0.02em; white-space: nowrap; }
.brand:hover { color: var(--text); }
.brand-mark { display: flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 10px; background: linear-gradient(135deg, var(--primary), var(--secondary)); flex-shrink: 0; }
.brand-mark svg { width: 20px; height: 20px; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav .nav-link { padding: 8px 16px; font-size: 15px; color: var(--text-secondary); border-radius: 6px; transition: color var(--transition), background var(--transition); position: relative; min-height: 44px; display: flex; align-items: center; }
.main-nav .nav-link:hover { color: #fff; background: rgba(34, 211, 238, 0.08); }
.main-nav .nav-link::after { content: ''; position: absolute; left: 16px; right: 16px; bottom: 0; height: 2px; background: var(--primary); border-radius: 2px; opacity: 0; transition: opacity var(--transition); }
.main-nav .nav-link.active { color: #fff; }
.main-nav .nav-link.active::after { opacity: 1; }
.nav-cta {
  margin-left: 16px; padding: 12px 28px; border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff; font-size: 15px; font-weight: 700; white-space: nowrap;
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.35);
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
  display: inline-flex; align-items: center; justify-content: center; min-height: 44px;
}
.nav-cta:hover { box-shadow: 0 0 32px rgba(34, 211, 238, 0.55); transform: translateY(-2px); color: #fff; filter: brightness(1.05); }
.nav-cta:active { transform: translateY(0); }
.nav-toggle { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 44px; height: 44px; padding: 10px; border-radius: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: transform var(--transition), opacity var(--transition); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero / Category Banner */
.category-hero {
  padding: 72px 0 64px;
  background: linear-gradient(135deg, rgba(11, 18, 32, 0.55), rgba(11, 18, 32, 0.82)), url('/assets/images/backpic/back-2.png') center/cover no-repeat, linear-gradient(135deg, #131c30, #0b1220);
  position: relative;
  border-bottom: 1px solid var(--border);
}
.category-hero-inner { display: flex; align-items: center; gap: 56px; }
.category-hero-text { flex: 1.15; }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; padding: 5px 14px; border-radius: 999px; background: rgba(34, 211, 238, 0.12); border: 1px solid rgba(34, 211, 238, 0.4); color: var(--primary); font-size: 13px; font-weight: 600; margin-bottom: 18px; letter-spacing: 0.02em; }
.category-hero-text h1 { font-size: clamp(32px, 5vw, 56px); font-weight: 800; line-height: 1.2; letter-spacing: 0.02em; margin-bottom: 18px; background: linear-gradient(120deg, #22D3EE, #8B5CF6); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.category-hero-text .hero-sub { font-size: 17px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 28px; max-width: 520px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary { display: inline-flex; align-items: center; justify-content: center; padding: 16px 44px; border-radius: 999px; background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff; font-size: 16px; font-weight: 700; min-height: 52px; box-shadow: 0 0 24px rgba(34, 211, 238, 0.35); transition: transform var(--transition), box-shadow var(--transition), filter var(--transition); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 40px rgba(34, 211, 238, 0.5); filter: brightness(1.05); color: #fff; }
.btn-secondary { display: inline-flex; align-items: center; justify-content: center; padding: 15px 40px; border-radius: 999px; background: transparent; color: #fff; font-size: 16px; font-weight: 600; min-height: 52px; border: 1px solid rgba(255, 255, 255, 0.4); transition: background var(--transition), border-color var(--transition), transform var(--transition); }
.btn-secondary:hover { background: rgba(255, 255, 255, 0.08); border-color: #fff; transform: translateY(-2px); color: #fff; }
.category-hero-media { flex: 0.85; }
.category-hero-media .media-wrap { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow); position: relative; }
.category-hero-media img { width: 100%; height: 340px; object-fit: cover; }
.category-hero-media::before { content: ''; position: absolute; inset: auto 10% -40px 10%; height: 80px; background: radial-gradient(ellipse at center, rgba(34, 211, 238, 0.25), transparent 70%); filter: blur(20px); }
.hero-trust { display: flex; gap: 20px; margin-top: 28px; flex-wrap: wrap; }
.trust-item { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-secondary); }
.trust-item svg { width: 16px; height: 16px; color: var(--primary); flex-shrink: 0; }

/* Section Common */
.section { padding: 96px 0; }
.section-alt { background: rgba(139, 92, 246, 0.04); }
.section-head { margin-bottom: 52px; max-width: 720px; }
.section-head .bar { display: inline-block; width: 4px; height: 22px; border-radius: 4px; background: linear-gradient(180deg, var(--primary), var(--secondary)); margin-right: 12px; vertical-align: -3px; }
.section-head h2 { font-size: clamp(24px, 3vw, 36px); font-weight: 700; line-height: 1.3; letter-spacing: 0.02em; margin-bottom: 12px; display: flex; align-items: center; }
.section-head .section-en { font-size: 13px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 8px; }
.section-head p { font-size: 16px; color: var(--text-secondary); line-height: 1.7; }

/* Features */
.feature-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }
.feature-media { position: relative; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow); }
.feature-media img { width: 100%; height: 420px; object-fit: cover; transition: transform 0.35s ease; }
.feature-media:hover img { transform: scale(1.03); }
.feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.feature-item { padding: 24px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition); }
.feature-item:hover { border-color: rgba(34, 211, 238, 0.5); box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.feature-icon { width: 42px; height: 42px; border-radius: 10px; background: rgba(34, 211, 238, 0.12); border: 1px solid rgba(34, 211, 238, 0.25); display: flex; align-items: center; justify-content: center; margin-bottom: 14px; }
.feature-icon svg { width: 22px; height: 22px; color: var(--primary); }
.feature-item h3 { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.feature-item p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

/* Scenario */
.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.scenario-card { padding: 32px 28px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--border); transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition); position: relative; overflow: hidden; }
.scenario-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--primary), transparent); opacity: 0; transition: opacity var(--transition); }
.scenario-card:hover { border-color: rgba(34, 211, 238, 0.45); box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.scenario-card:hover::before { opacity: 1; }
.scenario-num { font-size: 32px; font-weight: 800; background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: 12px; }
.scenario-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.scenario-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.65; }

/* Process */
.process-section { position: relative; overflow: hidden; }
.process-section::before { content: ''; position: absolute; top: 20%; left: -100px; width: 300px; height: 300px; background: radial-gradient(circle, rgba(139, 92, 246, 0.12), transparent 70%); pointer-events: none; }
.process-timeline { display: flex; gap: 0; position: relative; }
.process-timeline::before { content: ''; position: absolute; top: 36px; left: 24px; right: 24px; height: 2px; background: linear-gradient(90deg, var(--primary), var(--secondary)); border-radius: 2px; opacity: 0.3; }
.process-step { flex: 1; text-align: center; padding: 0 16px; position: relative; }
.step-dot { width: 72px; height: 72px; margin: 0 auto 16px; border-radius: 50%; background: var(--surface); border: 2px solid rgba(34, 211, 238, 0.5); display: flex; align-items: center; justify-content: center; position: relative; box-shadow: 0 0 24px rgba(34, 211, 238, 0.2); z-index: 1; }
.step-dot span { font-size: 20px; font-weight: 800; color: var(--primary); }
.step-icon { width: 36px; height: 36px; color: var(--primary); position: absolute; bottom: -18px; right: -12px; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 6px; }
.process-step h3 { font-size: 16px; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.process-step p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; max-width: 180px; margin: 0 auto; }

/* Compat */
.compat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.compat-card { padding: 32px 24px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); text-align: center; transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition); }
.compat-card:hover { border-color: rgba(139, 92, 246, 0.5); box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.compat-icon { width: 56px; height: 56px; margin: 0 auto 16px; border-radius: 16px; background: rgba(139, 92, 246, 0.12); border: 1px solid rgba(139, 92, 246, 0.25); display: flex; align-items: center; justify-content: center; }
.compat-icon svg { width: 28px; height: 28px; color: var(--secondary); }
.compat-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.compat-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.55; }

/* News */
.news-section { background: var(--bg); }
.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-card { display: flex; align-items: center; gap: 24px; padding: 16px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition); }
.news-card:hover { border-color: rgba(34, 211, 238, 0.4); box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.news-card .news-thumb { width: 120px; height: 90px; border-radius: 8px; overflow: hidden; flex-shrink: 0; background: linear-gradient(135deg, rgba(34, 211, 238, 0.2), rgba(139, 92, 246, 0.2)); }
.news-card .news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.35s ease; }
.news-card:hover .news-thumb img { transform: scale(1.05); }
.news-card-body { flex: 1; min-width: 0; }
.news-card-body h3 { font-size: 17px; font-weight: 600; color: var(--text); margin-bottom: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.news-card-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 8px; }
.news-meta { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--text-muted); }
.news-meta .badge { padding: 3px 10px; border-radius: 999px; background: rgba(34, 211, 238, 0.12); border: 1px solid rgba(34, 211, 238, 0.3); color: var(--primary); font-size: 12px; font-weight: 600; transition: background var(--transition); }
.news-card:hover .news-meta .badge { background: var(--primary); color: #fff; }
.news-empty { padding: 56px 24px; text-align: center; border-radius: var(--radius-lg); background: var(--surface); border: 1px dashed rgba(148, 163, 184, 0.3); }
.empty-icon { width: 52px; height: 52px; margin: 0 auto 14px; border-radius: 50%; background: rgba(148, 163, 184, 0.1); display: flex; align-items: center; justify-content: center; }
.empty-icon svg { width: 24px; height: 24px; color: var(--text-muted); }
.news-empty p { font-size: 15px; color: var(--text-muted); }

/* FAQ */
.faq-section { background: rgba(139, 92, 246, 0.04); }
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); transition: border-color var(--transition), box-shadow var(--transition); }
.faq-item.open { border-color: rgba(34, 211, 238, 0.4); box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2); }
.faq-question { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 24px; cursor: pointer; width: 100%; text-align: left; min-height: 44px; }
.faq-question span { font-size: 16px; font-weight: 600; color: var(--text); flex: 1; }
.faq-toggle { width: 28px; height: 28px; border-radius: 50%; background: rgba(34, 211, 238, 0.12); border: 1px solid rgba(34, 211, 238, 0.4); display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: transform var(--transition), background var(--transition); }
.faq-toggle svg { width: 14px; height: 14px; color: var(--primary); transition: transform var(--transition); }
.faq-item.open .faq-toggle { transform: rotate(45deg); background: var(--primary); }
.faq-item.open .faq-toggle svg { color: #fff; }
.faq-answer { max-height: 0; overflow: hidden; padding: 0 24px; transition: max-height 0.3s ease, padding 0.3s ease; }
.faq-answer-inner { padding-bottom: 22px; font-size: 15px; color: var(--text-secondary); line-height: 1.75; }
.faq-item.open .faq-answer { max-height: 300px; }

/* CTA */
.cta-section { padding: 96px 0; position: relative; overflow: hidden; background: linear-gradient(135deg, rgba(34, 211, 238, 0.08), rgba(139, 92, 246, 0.13)), var(--bg); }
.cta-section::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--primary), var(--secondary), transparent); opacity: 0.5; }
.cta-inner { text-align: center; max-width: 640px; margin: 0 auto; position: relative; }
.cta-inner h2 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; line-height: 1.25; margin-bottom: 16px; letter-spacing: 0.02em; }
.cta-inner h2 .grad { background: linear-gradient(120deg, #22D3EE, #8B5CF6); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.cta-inner p { font-size: 16px; color: var(--text-secondary); margin-bottom: 32px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.cta-note { margin-top: 20px; font-size: 13px; color: var(--text-muted); }

/* Footer */
.site-footer { background: #080e18; border-top: 1px solid var(--border); padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 0.8fr 0.9fr; gap: 48px; padding-bottom: 40px; border-bottom: 1px solid rgba(148, 163, 184, 0.1); }
.footer-brand .brand { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; max-width: 320px; margin-bottom: 20px; }
.footer-badges { display: flex; gap: 10px; flex-wrap: wrap; }
.footer-badge { padding: 4px 14px; border-radius: 999px; border: 1px solid rgba(34, 211, 238, 0.3); background: rgba(34, 211, 238, 0.06); font-size: 12px; color: var(--primary); font-weight: 500; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 16px; letter-spacing: 0.02em; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { font-size: 14px; color: var(--text-secondary); transition: color var(--transition), padding-left var(--transition); }
.footer-col ul a:hover { color: var(--primary); padding-left: 4px; }
.footer-contact li { display: flex; flex-direction: column; gap: 2px; padding: 8px 0; border-bottom: 1px solid rgba(148, 163, 184, 0.08); }
.footer-contact li span:first-child { font-size: 12px; color: var(--text-muted); }
.footer-contact li span:last-child { font-size: 14px; color: var(--text-secondary); }
.footer-bottom { padding-top: 24px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.footer-bottom p { font-size: 13px; color: var(--text-muted); }
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--primary); }

/* Back to top */
.back-top { position: fixed; bottom: 32px; right: 32px; width: 44px; height: 44px; border-radius: 50%; background: var(--surface); border: 1px solid rgba(34, 211, 238, 0.4); display: flex; align-items: center; justify-content: center; cursor: pointer; opacity: 0; visibility: hidden; transition: opacity var(--transition), visibility var(--transition), transform var(--transition); z-index: 90; }
.back-top.visible { opacity: 1; visibility: visible; }
.back-top:hover { transform: translateY(-3px); background: rgba(34, 211, 238, 0.15); }
.back-top svg { width: 20px; height: 20px; color: var(--primary); }

/* Responsive */
@media (max-width: 1023px) {
  .category-hero-inner { gap: 32px; }
  .category-hero-media .media-wrap img { height: 280px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-media img { height: 340px; }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .process-timeline { flex-direction: column; gap: 32px; padding-left: 20px; }
  .process-timeline::before { top: 0; left: 20px; right: auto; width: 2px; height: 100%; }
  .process-step { text-align: left; padding: 0 0 0 52px; }
  .step-dot { margin: 0 0 12px; }
  .compat-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 767px) {
  .section { padding: 56px 0; }
  .container { padding: 0 16px; }
  .site-header { height: 64px; }
  .header-inner { height: 64px; }
  .main-nav { position: fixed; top: 64px; right: 0; width: 280px; height: calc(100vh - 64px); background: rgba(11, 18, 32, 0.96); backdrop-filter: blur(12px); flex-direction: column; justify-content: flex-start; padding: 24px; gap: 8px; transform: translateX(100%); transition: transform 0.3s ease; border-left: 1px solid var(--border); overflow-y: auto; }
  .main-nav.open { transform: translateX(0); }
  .main-nav .nav-link { width: 100%; font-size: 16px; padding: 14px 16px; }
  .main-nav .nav-link::after { left: 16px; }
  .nav-cta { margin: 20px 0 0; width: 100%; justify-content: center; }
  .nav-toggle { display: flex; }
  .category-hero { padding: 48px 0 40px; }
  .category-hero-inner { flex-direction: column; gap: 24px; }
  .category-hero-text h1 { font-size: 32px; }
  .category-hero-text .hero-sub { font-size: 15px; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-secondary { width: 100%; }
  .hero-trust { gap: 12px; }
  .feature-list { grid-template-columns: 1fr; }
  .feature-media img { height: 240px; }
  .scenario-grid { grid-template-columns: 1fr; }
  .compat-grid { grid-template-columns: 1fr; gap: 16px; }
  .news-card { flex-direction: column; align-items: flex-start; gap: 14px; padding: 16px; }
  .news-card .news-thumb { width: 100%; height: 160px; }
  .news-card-body h3 { white-space: normal; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn-primary, .cta-actions .btn-secondary { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .back-top { bottom: 20px; right: 20px; }
}

/* Animations */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
.fade-up { animation: fadeInUp 0.6s ease both; }
.fade-up-delay-1 { animation-delay: 0.1s; }
.fade-up-delay-2 { animation-delay: 0.2s; }
.fade-up-delay-3 { animation-delay: 0.3s; }

/* roulang page: category3 */
:root {
      --primary: #22D3EE;
      --secondary: #8B5CF6;
      --accent: #F59E0B;
      --bg: #0B1220;
      --surface: #1E293B;
      --surface-2: #16213A;
      --border: rgba(148, 163, 184, 0.16);
      --text: #E2E8F0;
      --text-sub: #94A3B8;
      --text-weak: #64748B;
      --success: #10B981;
      --warning: #F59E0B;
      --danger: #EF4444;
      --radius: 12px;
      --radius-lg: 16px;
      --radius-sm: 8px;
      --shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
      --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
      --gradient: linear-gradient(135deg, #22D3EE 0%, #8B5CF6 100%);
      --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Inter", sans-serif;
      --container: 1200px;
      --gap: 24px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font);
      background: var(--bg);
      color: var(--text);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    a {
      color: inherit;
      text-decoration: none;
    }

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }

    ul,
    ol {
      list-style: none;
    }

    .container {
      max-width: var(--container);
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* ========== Header / Nav ========== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      height: 72px;
      background: rgba(11, 18, 32, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid transparent;
      transition: border-color 0.3s, box-shadow 0.3s;
    }

    .site-header.scrolled {
      border-bottom-color: var(--border);
      box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
      gap: 16px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: #fff;
      letter-spacing: 0.02em;
      white-space: nowrap;
    }

    .brand-mark {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: var(--gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      box-shadow: 0 0 16px rgba(34, 211, 238, 0.4);
    }

    .brand-mark svg {
      width: 20px;
      height: 20px;
      stroke: #fff;
      fill: none;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .nav-link {
      position: relative;
      padding: 8px 16px;
      font-size: 15px;
      color: var(--text-sub);
      border-radius: 8px;
      transition: color 0.25s, background 0.25s;
      display: inline-flex;
      align-items: center;
      min-height: 44px;
      white-space: nowrap;
    }

    .nav-link:hover {
      color: #fff;
      background: rgba(255, 255, 255, 0.06);
    }

    .nav-link.active {
      color: #fff;
      font-weight: 600;
    }

    .nav-link.active::after {
      content: "";
      position: absolute;
      left: 16px;
      right: 16px;
      bottom: 2px;
      height: 2px;
      border-radius: 2px;
      background: var(--primary);
      box-shadow: 0 0 8px rgba(34, 211, 238, 0.6);
    }

    .nav-cta {
      margin-left: 12px;
      padding: 12px 28px;
      background: var(--gradient);
      color: #fff;
      font-weight: 700;
      font-size: 15px;
      border-radius: 999px;
      box-shadow: 0 0 20px rgba(34, 211, 238, 0.35);
      transition: transform 0.25s, box-shadow 0.25s;
      white-space: nowrap;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
    }

    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(34, 211, 238, 0.5);
    }

    .nav-cta:active {
      transform: translateY(0);
      box-shadow: 0 2px 12px rgba(34, 211, 238, 0.3);
    }

    .nav-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      width: 44px;
      height: 44px;
      align-items: center;
      justify-content: center;
      border-radius: 8px;
      transition: background 0.25s;
    }

    .nav-toggle:hover {
      background: rgba(255, 255, 255, 0.06);
    }

    .nav-toggle span {
      width: 22px;
      height: 2px;
      background: #fff;
      border-radius: 2px;
      transition: transform 0.3s, opacity 0.3s;
    }

    /* ========== Buttons ========== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: 10px;
      font-size: 15px;
      font-weight: 700;
      line-height: 1.4;
      transition: transform 0.25s, box-shadow 0.25s, background 0.25s, border-color 0.25s;
      min-height: 44px;
    }

    .btn-primary {
      background: var(--gradient);
      color: #fff;
      box-shadow: 0 0 20px rgba(34, 211, 238, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(34, 211, 238, 0.5);
    }

    .btn-primary:active {
      transform: translateY(0);
    }

    .btn-ghost {
      background: transparent;
      color: #fff;
      border: 1px solid rgba(255, 255, 255, 0.6);
    }

    .btn-ghost:hover {
      border-color: var(--primary);
      color: var(--primary);
      box-shadow: 0 0 20px rgba(34, 211, 238, 0.2);
      transform: translateY(-2px);
    }

    .btn-lg {
      padding: 16px 44px;
      font-size: 16px;
      border-radius: 999px;
    }

    /* ========== Section Head ========== */
    .section {
      padding: 80px 0;
      position: relative;
    }

    .section-head {
      max-width: 720px;
      margin-bottom: 48px;
      position: relative;
      padding-left: 16px;
    }

    .section-head::before {
      content: "";
      position: absolute;
      left: 0;
      top: 6px;
      bottom: 6px;
      width: 4px;
      border-radius: 4px;
      background: linear-gradient(180deg, var(--primary), var(--secondary));
    }

    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: var(--primary);
      margin-bottom: 8px;
    }

    .section-head h2 {
      font-size: clamp(26px, 3vw, 36px);
      font-weight: 700;
      line-height: 1.3;
      color: #fff;
      margin-bottom: 8px;
    }

    .section-head p {
      font-size: 15px;
      color: var(--text-sub);
    }

    /* ========== Breadcrumb ========== */
    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--text-weak);
      margin-bottom: 16px;
    }

    .breadcrumb a {
      color: var(--text-weak);
      transition: color 0.2s;
    }

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

    .breadcrumb span {
      color: var(--text-weak);
    }

    .breadcrumb .current {
      color: var(--text-sub);
    }

    /* ========== Category Hero ========== */
    .category-hero {
      position: relative;
      padding: 72px 0 80px;
      background-image: linear-gradient(100deg, rgba(11, 18, 32, 0.97) 15%, rgba(30, 41, 59, 0.88) 60%, rgba(139, 92, 246, 0.3) 100%), url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      border-bottom: 1px solid var(--border);
      overflow: hidden;
    }

    .category-hero::before {
      content: "";
      position: absolute;
      top: -80px;
      right: -80px;
      width: 320px;
      height: 320px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(34, 211, 238, 0.15), transparent 70%);
      pointer-events: none;
    }

    .category-hero::after {
      content: "";
      position: absolute;
      bottom: -120px;
      left: 20%;
      width: 280px;
      height: 280px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(139, 92, 246, 0.12), transparent 70%);
      pointer-events: none;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      gap: 48px;
      align-items: center;
      position: relative;
      z-index: 2;
    }

    .hero-content h1 {
      font-size: clamp(32px, 5vw, 56px);
      font-weight: 800;
      line-height: 1.2;
      color: #fff;
      margin-bottom: 12px;
      letter-spacing: 0.02em;
      background: linear-gradient(120deg, #fff 50%, var(--primary) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-sub {
      font-size: 17px;
      color: var(--text-sub);
      line-height: 1.7;
      margin-bottom: 28px;
      max-width: 460px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 32px;
    }

    .hero-trust {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .trust-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      background: rgba(30, 41, 59, 0.7);
      border: 1px solid var(--border);
      border-radius: 999px;
      font-size: 13px;
      color: var(--text-sub);
    }

    .trust-badge::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--success);
      box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
    }

    .hero-visual {
      position: relative;
    }

    .hero-visual img {
      width: 100%;
      max-height: 420px;
      object-fit: cover;
      border-radius: 18px;
      border: 1px solid rgba(34, 211, 238, 0.2);
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
    }

    .hero-visual::after {
      content: "";
      position: absolute;
      inset: 0;
      border-radius: 18px;
      background: linear-gradient(135deg, rgba(34, 211, 238, 0.08), rgba(139, 92, 246, 0.1));
      pointer-events: none;
    }

    /* ========== Feature Grid ========== */
    .section-feature {
      background: var(--bg);
    }

    .feature-grid {
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      gap: 24px;
    }

    .feature-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
      position: relative;
      overflow: hidden;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(34, 211, 238, 0.5);
    }

    .feature-main {
      grid-row: span 2;
      display: flex;
      flex-direction: column;
      justify-content: center;
      min-height: 300px;
      background: linear-gradient(135deg, rgba(34, 211, 238, 0.08), rgba(139, 92, 246, 0.05)), var(--surface);
    }

    .feature-wide {
      grid-column: 1 / -1;
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .feature-icon {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      background: var(--gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      box-shadow: 0 0 18px rgba(34, 211, 238, 0.3);
      flex-shrink: 0;
    }

    .feature-icon svg {
      width: 26px;
      height: 26px;
      stroke: #fff;
      fill: none;
      stroke-width: 2;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    .feature-wide .feature-icon {
      margin-bottom: 0;
    }

    .feature-card h3 {
      font-size: 20px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .feature-card p {
      font-size: 15px;
      color: var(--text-sub);
      line-height: 1.75;
    }

    /* ========== Timeline ========== */
    .section-timeline {
      background: linear-gradient(180deg, var(--bg) 0%, rgba(30, 41, 59, 0.35) 100%);
    }

    .timeline {
      position: relative;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      padding: 24px 0 0;
    }

    .timeline::before {
      content: "";
      position: absolute;
      top: 44px;
      left: 8%;
      right: 8%;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.35), rgba(139, 92, 246, 0.35), transparent);
    }

    .timeline-item {
      position: relative;
      padding-top: 64px;
    }

    .timeline-dot {
      position: absolute;
      top: 16px;
      left: 24px;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: var(--surface);
      border: 2px solid var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 800;
      color: var(--primary);
      box-shadow: 0 0 20px rgba(34, 211, 238, 0.25);
      z-index: 2;
    }

    .timeline-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px;
      transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
      height: 100%;
    }

    .timeline-card:hover {
      border-color: rgba(34, 211, 238, 0.5);
      transform: translateY(-3px);
      box-shadow: var(--shadow);
    }

    .timeline-card h3 {
      font-size: 18px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 8px;
    }

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

    /* ========== Scenario ========== */
    .section-scenario {
      background: var(--bg);
    }

    .scenario-grid {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 48px;
      align-items: center;
    }

    .scenario-visual img {
      width: 100%;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-lg);
    }

    .scenario-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .scenario-item {
      display: flex;
      gap: 18px;
      align-items: flex-start;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px;
      transition: border-color 0.3s, transform 0.3s;
    }

    .scenario-item:hover {
      border-color: rgba(34, 211, 238, 0.4);
      transform: translateX(4px);
    }

    .scenario-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: rgba(34, 211, 238, 0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .scenario-icon svg {
      width: 22px;
      height: 22px;
      stroke: var(--primary);
      fill: none;
      stroke-width: 2;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    .scenario-item h3 {
      font-size: 17px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 4px;
    }

    .scenario-item p {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.7;
    }

    /* ========== Compare ========== */
    .section-compare {
      background: linear-gradient(180deg, var(--bg) 0%, rgba(139, 92, 246, 0.06) 60%, var(--bg) 100%);
    }

    .compare-grid {
      display: grid;
      grid-template-columns: 1fr 1.15fr 1fr;
      gap: 24px;
      align-items: stretch;
    }

    .compare-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      display: flex;
      flex-direction: column;
      transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
    }

    .compare-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow);
    }

    .compare-card.featured {
      border-color: rgba(34, 211, 238, 0.5);
      box-shadow: 0 0 0 1px rgba(34, 211, 238, 0.25), 0 16px 48px rgba(0, 0, 0, 0.4);
      background: linear-gradient(135deg, rgba(34, 211, 238, 0.06), rgba(139, 92, 246, 0.04)), var(--surface);
    }

    .compare-card.featured:hover {
      transform: translateY(-6px);
      box-shadow: 0 0 0 1px rgba(34, 211, 238, 0.4), 0 20px 56px rgba(0, 0, 0, 0.5);
    }

    .compare-label {
      font-size: 14px;
      color: var(--text-sub);
      font-weight: 600;
      margin-bottom: 12px;
    }

    .compare-badge {
      display: inline-block;
      width: fit-content;
      background: var(--accent);
      color: #0B1220;
      font-size: 13px;
      font-weight: 800;
      padding: 4px 14px;
      border-radius: 999px;
      margin-bottom: 20px;
      box-shadow: 0 0 16px rgba(245, 158, 11, 0.3);
    }

    .compare-card.featured h3 {
      font-size: 22px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 8px;
    }

    .compare-card:not(.featured) h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--text-sub);
      margin-bottom: 8px;
    }

    .compare-list {
      margin-top: 16px;
      flex: 1;
    }

    .compare-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 12px 0;
      border-bottom: 1px solid var(--border);
      font-size: 15px;
      color: var(--text);
      gap: 12px;
    }

    .compare-item:last-child {
      border-bottom: none;
    }

    .compare-item .dim {
      color: var(--text-sub);
    }

    .compare-status {
      font-size: 14px;
      font-weight: 600;
      white-space: nowrap;
    }

    .compare-status.check {
      color: var(--success);
    }

    .compare-status.cross {
      color: var(--danger);
    }

    .compare-status.warn {
      color: var(--warning);
    }

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

    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      max-width: 860px;
    }

    .faq-item {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      transition: border-color 0.3s, background 0.3s;
    }

    .faq-item.open {
      border-color: rgba(34, 211, 238, 0.4);
      background: rgba(30, 41, 59, 0.85);
    }

    .faq-question {
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      text-align: left;
      gap: 16px;
      min-height: 60px;
      transition: color 0.25s;
    }

    .faq-question:hover {
      color: #fff;
    }

    .faq-icon {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      border: 2px solid var(--primary);
      position: relative;
      flex-shrink: 0;
      transition: transform 0.3s, border-color 0.3s;
    }

    .faq-icon::before,
    .faq-icon::after {
      content: "";
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      background: var(--primary);
      width: 10px;
      height: 2px;
      border-radius: 2px;
    }

    .faq-icon::after {
      transform: translate(-50%, -50%) rotate(90deg);
    }

    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      border-color: var(--secondary);
    }

    .faq-item.open .faq-icon::before,
    .faq-item.open .faq-icon::after {
      background: var(--secondary);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.3s ease;
      padding: 0 24px;
      font-size: 15px;
      color: var(--text-sub);
      line-height: 1.75;
    }

    .faq-item.open .faq-answer {
      max-height: 500px;
      padding: 0 24px 20px;
    }

    /* ========== News ========== */
    .section-news {
      background: linear-gradient(180deg, var(--bg) 0%, rgba(30, 41, 59, 0.3) 100%);
    }

    .news-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .news-card {
      display: flex;
      gap: 24px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 20px;
      transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
    }

    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(34, 211, 238, 0.5);
    }

    .news-thumb {
      width: 180px;
      height: 120px;
      border-radius: 10px;
      overflow: hidden;
      flex-shrink: 0;
      background: var(--surface-2);
    }

    .news-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.35s;
    }

    .news-card:hover .news-thumb img {
      transform: scale(1.05);
    }

    .news-body {
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: center;
      min-width: 0;
    }

    .news-body h3 {
      font-size: 18px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 8px;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .news-body p {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.6;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      margin-bottom: 12px;
    }

    .news-meta {
      display: flex;
      align-items: center;
      gap: 14px;
      font-size: 13px;
      color: var(--text-weak);
      flex-wrap: wrap;
    }

    .news-tag {
      display: inline-block;
      padding: 2px 10px;
      background: rgba(34, 211, 238, 0.12);
      border: 1px solid rgba(34, 211, 238, 0.25);
      border-radius: 999px;
      color: var(--primary);
      font-weight: 600;
      font-size: 12px;
    }

    .news-more {
      color: var(--primary);
      font-weight: 600;
      margin-left: auto;
      transition: color 0.2s;
    }

    .news-more:hover {
      color: #fff;
    }

    .news-empty {
      text-align: center;
      padding: 48px 24px;
      background: var(--surface);
      border: 1px dashed var(--border);
      border-radius: var(--radius-lg);
      color: var(--text-weak);
      font-size: 15px;
    }

    /* ========== CTA ========== */
    .section-cta {
      padding: 80px 0;
      position: relative;
      background: var(--bg);
      border-top: 1px solid var(--border);
    }

    .cta-card {
      position: relative;
      text-align: center;
      background: linear-gradient(135deg, rgba(30, 41, 59, 0.92), rgba(15, 23, 42, 0.96));
      border: 1px solid rgba(34, 211, 238, 0.25);
      border-radius: 20px;
      padding: 64px 32px;
      overflow: hidden;
    }

    .cta-card::before {
      content: "";
      position: absolute;
      top: -100px;
      left: 10%;
      width: 300px;
      height: 300px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(34, 211, 238, 0.16), transparent 70%);
      pointer-events: none;
    }

    .cta-card::after {
      content: "";
      position: absolute;
      bottom: -80px;
      right: 8%;
      width: 260px;
      height: 260px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(139, 92, 246, 0.16), transparent 70%);
      pointer-events: none;
    }

    .cta-card h2 {
      font-size: clamp(26px, 3.4vw, 42px);
      font-weight: 800;
      color: #fff;
      line-height: 1.3;
      margin-bottom: 12px;
      position: relative;
      z-index: 2;
    }

    .cta-card p {
      font-size: 16px;
      color: var(--text-sub);
      margin-bottom: 32px;
      position: relative;
      z-index: 2;
    }

    .cta-actions {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
      position: relative;
      z-index: 2;
    }

    .cta-actions .btn {
      min-width: 180px;
    }

    .cta-note {
      display: flex;
      justify-content: center;
      gap: 24px;
      margin-top: 28px;
      position: relative;
      z-index: 2;
      flex-wrap: wrap;
    }

    .cta-note span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      color: var(--text-weak);
    }

    .cta-note span::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 8px rgba(34, 211, 238, 0.6);
    }

    /* ========== Footer ========== */
    .site-footer {
      background: #0A0F1A;
      border-top: 1px solid var(--border);
      padding-top: 64px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr 1fr;
      gap: 48px;
      padding-bottom: 48px;
    }

    .footer-brand .brand {
      margin-bottom: 16px;
    }

    .footer-brand p {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.7;
      margin-bottom: 16px;
      max-width: 340px;
    }

    .footer-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .footer-badge {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(34, 211, 238, 0.08);
      border: 1px solid rgba(34, 211, 238, 0.2);
      border-radius: 999px;
      font-size: 12px;
      color: var(--primary);
    }

    .footer-col h4 {
      font-size: 16px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }

    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-col ul a {
      display: inline-flex;
      align-items: center;
      min-height: 32px;
      font-size: 14px;
      color: var(--text-sub);
      transition: color 0.2s, transform 0.2s;
    }

    .footer-col ul a:hover {
      color: var(--primary);
      transform: translateX(4px);
    }

    .footer-contact li {
      display: flex;
      flex-direction: column;
      gap: 2px;
      padding: 10px 0;
      border-bottom: 1px solid var(--border);
    }

    .footer-contact li:last-child {
      border-bottom: none;
    }

    .footer-contact span:first-child {
      font-size: 13px;
      color: var(--text-weak);
    }

    .footer-contact span:last-child {
      font-size: 14px;
      color: var(--text-sub);
    }

    .footer-bottom {
      border-top: 1px solid var(--border);
      padding: 20px 0 24px;
      text-align: center;
    }

    .footer-bottom p {
      font-size: 13px;
      color: var(--text-weak);
    }

    .footer-bottom a {
      color: var(--text-sub);
      transition: color 0.2s;
    }

    .footer-bottom a:hover {
      color: var(--primary);
    }

    /* ========== Scroll Top ========== */
    .scroll-top {
      position: fixed;
      right: 24px;
      bottom: 24px;
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--surface);
      border: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-sub);
      opacity: 0;
      visibility: hidden;
      transform: translateY(12px);
      transition: opacity 0.3s, transform 0.3s, visibility 0.3s, border-color 0.3s, color 0.3s;
      z-index: 90;
    }

    .scroll-top.visible {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }

    .scroll-top:hover {
      color: var(--primary);
      border-color: rgba(34, 211, 238, 0.4);
    }

    .scroll-top svg {
      width: 20px;
      height: 20px;
      stroke: currentColor;
      fill: none;
      stroke-width: 2;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    /* ========== Responsive ========== */
    @media (max-width: 1024px) {
      .feature-grid {
        grid-template-columns: 1fr 1fr;
      }

      .feature-main {
        grid-row: auto;
      }

      .feature-wide {
        grid-column: 1 / -1;
      }

      .compare-grid {
        grid-template-columns: 1fr;
        max-width: 560px;
        margin: 0 auto;
      }

      .compare-card.featured {
        order: -1;
      }

      .scenario-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }

      .timeline {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
      }

      .timeline::before {
        display: none;
      }

      .timeline-item {
        padding-top: 0;
      }

      .timeline-dot {
        position: static;
        margin-bottom: 16px;
      }
    }

    @media (max-width: 900px) {
      .site-header {
        height: 64px;
      }

      .main-nav {
        position: fixed;
        top: 0;
        right: -320px;
        width: 300px;
        height: 100dvh;
        background: rgba(11, 18, 32, 0.97);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 80px 24px 32px;
        transition: right 0.35s ease;
        z-index: 998;
        overflow-y: auto;
        box-shadow: -8px 0 32px rgba(0, 0, 0, 0.4);
      }

      .main-nav.open {
        right: 0;
      }

      .nav-link {
        padding: 12px 16px;
        min-height: 48px;
        font-size: 16px;
      }

      .nav-link.active::after {
        bottom: 6px;
        left: 32px;
        right: auto;
        width: 20px;
      }

      .nav-cta {
        margin: 16px 0 0;
        text-align: center;
        padding: 14px 28px;
      }

      .nav-toggle {
        display: flex;
        z-index: 999;
      }

      .nav-toggle.open span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
      }

      .nav-toggle.open span:nth-child(2) {
        opacity: 0;
      }

      .nav-toggle.open span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
      }

      .hero-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }

      .hero-visual {
        max-width: 560px;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
      }
    }

    @media (max-width: 767px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }

      .section {
        padding: 56px 0;
      }

      .category-hero {
        padding: 56px 0 64px;
      }

      .hero-actions {
        flex-direction: column;
      }

      .hero-actions .btn {
        width: 100%;
      }

      .feature-grid {
        grid-template-columns: 1fr;
      }

      .feature-wide {
        grid-column: auto;
      }

      .timeline {
        grid-template-columns: 1fr;
      }

      .timeline-item {
        padding-left: 72px;
        padding-top: 0;
        position: relative;
      }

      .timeline-dot {
        position: absolute;
        left: 0;
        top: 12px;
        width: 48px;
        height: 48px;
        font-size: 16px;
      }

      .timeline-card {
        padding: 20px;
      }

      .scenario-item {
        flex-direction: column;
        padding: 20px;
      }

      .compare-card {
        padding: 24px 20px;
      }

      .news-card {
        flex-direction: column;
        padding: 16px;
      }

      .news-thumb {
        width: 100%;
        height: 160px;
      }

      .news-meta {
        gap: 10px;
      }

      .news-more {
        margin-left: 0;
      }

      .faq-question {
        padding: 16px;
        font-size: 15px;
      }

      .faq-item.open .faq-answer {
        padding: 0 16px 16px;
      }

      .cta-card {
        padding: 48px 20px;
      }

      .cta-actions .btn {
        width: 100%;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        padding-bottom: 32px;
      }

      .site-footer {
        padding-top: 48px;
      }

      .brand {
        font-size: 18px;
      }
    }

    @media (max-width: 520px) {
      .brand-mark {
        width: 32px;
        height: 32px;
      }

      .brand {
        font-size: 16px;
        gap: 8px;
      }

      .brand span:last-child {
        font-size: 16px;
      }

      .section-head h2 {
        font-size: 24px;
      }

      .hero-content h1 {
        font-size: 32px;
      }

      .hero-sub {
        font-size: 15px;
      }

      .feature-card {
        padding: 24px 20px;
      }
    }