/* roulang page: index */
:root{
  --primary:#2E7CF6;
  --primary-dark:#1F66E0;
  --primary-active:#1752B8;
  --accent:#00D4C0;
  --amber:#FFC461;
  --bg-base:#070C1A;
  --bg-secondary:#0B1327;
  --bg-tertiary:#0E1930;
  --text-main:#E6EDF7;
  --text-secondary:#9DB0C7;
  --text-muted:#66788F;
  --error:#FF5D6C;
  --success:#00D4C0;
  --warning:#FFC461;
  --radius-sm:8px;
  --radius-md:16px;
  --radius-lg:24px;
  --font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --shadow-card:0 8px 32px rgba(0,0,0,.3);
  --shadow-glow:0 0 24px rgba(46,124,246,.45),0 4px 12px rgba(0,0,0,.3);
  --transition:0.25s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font-family);
  font-size:17px;
  line-height:1.8;
  color:var(--text-main);
  background-color:var(--bg-base);
  background-image:
    radial-gradient(circle at 15% 8%,rgba(46,124,246,.16),transparent 45%),
    radial-gradient(circle at 85% 92%,rgba(0,212,192,.07),transparent 45%),
    linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px);
  background-size:100% 100%,100% 100%,44px 44px,44px 44px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:var(--accent);text-decoration:none;transition:color var(--transition);}
a:hover{color:#ffffff;}
img{max-width:100%;display:block;object-fit:cover;}
button,input,select,textarea{font-family:inherit;font-size:inherit;line-height:inherit;}
ul{list-style:none;}
.container{max-width:1280px;margin:0 auto;padding:0 48px;}
.section{padding:104px 0;position:relative;}
.section-head{
  max-width:720px;
  margin-bottom:56px;
}
.section-head h2{
  font-size:40px;
  font-weight:700;
  line-height:1.3;
  letter-spacing:-0.5px;
  color:var(--text-main);
  margin-bottom:16px;
}
.section-head p{
  font-size:17px;
  color:var(--text-secondary);
  line-height:1.8;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:52px;
  padding:0 28px;
  border-radius:12px;
  font-size:16px;
  font-weight:600;
  border:none;
  cursor:pointer;
  transition:all var(--transition);
  text-decoration:none;
  white-space:nowrap;
  outline:none;
}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px;}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  color:#fff;
  box-shadow:var(--shadow-glow);
  border-top:1px solid rgba(255,255,255,.14);
}
.btn-primary:hover{
  background:linear-gradient(135deg,#4A8DF8,var(--primary-dark));
  box-shadow:0 0 34px rgba(46,124,246,.6),0 6px 18px rgba(0,0,0,.35);
  transform:translateY(-1px);
  color:#fff;
}
.btn-primary:active{
  transform:translateY(1px);
  box-shadow:0 0 14px rgba(46,124,246,.3),0 2px 6px rgba(0,0,0,.3);
}
.btn-ghost{
  background:rgba(255,255,255,.05);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border:1px solid rgba(255,255,255,.2);
  color:var(--text-main);
  min-height:52px;
}
.btn-ghost:hover{
  border-color:var(--accent);
  color:#fff;
  background:rgba(0,212,192,.08);
  transform:translateY(-1px);
}
.badge{
  display:inline-flex;
  align-items:center;
  padding:4px 12px;
  border-radius:100px;
  font-size:12px;
  font-weight:500;
  letter-spacing:.4px;
  background:rgba(0,212,192,.1);
  color:var(--accent);
  border:1px solid rgba(0,212,192,.2);
}
.glass-card{
  background:rgba(255,255,255,.05);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.12);
  border-top-color:rgba(255,255,255,.2);
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-card);
}
/* ===== NAV ===== */
.site-nav{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1000;
  height:72px;
  display:flex;
  align-items:center;
  background:rgba(7,12,26,.6);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.site-nav.nav-scrolled{
  background:rgba(7,12,26,.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom-color:rgba(255,255,255,.08);
  box-shadow:0 4px 30px rgba(0,0,0,.4);
}
.nav-inner{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding:0 48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.nav-brand{
  display:flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  flex-shrink:0;
}
.brand-mark{
  width:38px;
  height:38px;
  border-radius:10px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:18px;
  color:#fff;
  font-weight:700;
  box-shadow:0 0 16px rgba(46,124,246,.35);
  letter-spacing:-1px;
}
.brand-name{
  font-size:20px;
  font-weight:700;
  color:var(--text-main);
  letter-spacing:.3px;
  white-space:nowrap;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:4px;
  margin:0;
  padding:0;
}
.nav-links li{margin:0;}
.nav-links a{
  display:block;
  padding:10px 16px;
  font-size:15px;
  font-weight:500;
  color:var(--text-secondary);
  border-radius:8px;
  position:relative;
  transition:color var(--transition),background var(--transition);
}
.nav-links a:hover{
  color:var(--primary);
  background:rgba(46,124,246,.06);
}
.nav-links a.active{
  color:var(--accent);
  font-weight:600;
}
.nav-links a.active::after{
  content:'';
  position:absolute;
  left:16px;right:16px;bottom:4px;
  height:2px;
  background:var(--accent);
  border-radius:2px;
  box-shadow:0 0 8px rgba(0,212,192,.5);
}
.nav-cta{
  flex-shrink:0;
}
.nav-toggle{
  display:none;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.14);
  border-radius:8px;
  width:44px;height:44px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
}
.nav-toggle span{
  display:block;
  width:20px;height:2px;
  background:var(--text-main);
  border-radius:2px;
  transition:transform .3s,opacity .3s;
}
.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);}
/* ===== HERO ===== */
.hero{
  min-height:92vh;
  display:flex;
  align-items:center;
  position:relative;
  padding:140px 0 80px;
  overflow:hidden;
}
.hero-bg{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  opacity:.45;
}
.hero-bg::after{
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(7,12,26,.6) 0%,rgba(7,12,26,.75) 60%,rgba(7,12,26,.92) 100%);
}
.hero-inner{
  position:relative;
  z-index:2;
  text-align:center;
}
.hero-tag{
  display:inline-block;
  padding:6px 16px;
  border-radius:100px;
  background:rgba(0,212,192,.08);
  border:1px solid rgba(0,212,192,.22);
  color:var(--accent);
  font-size:13px;
  letter-spacing:.6px;
  margin-bottom:28px;
}
.hero h1{
  font-size:56px;
  font-weight:700;
  line-height:1.2;
  letter-spacing:-0.5px;
  max-width:820px;
  margin:0 auto 24px;
  background:linear-gradient(180deg,#ffffff 30%,#BFD0E8 100%);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  color:transparent;
}
.hero-desc{
  font-size:19px;
  color:var(--text-secondary);
  max-width:640px;
  margin:0 auto 40px;
  line-height:1.8;
}
.hero-actions{
  display:flex;
  justify-content:center;
  gap:16px;
  flex-wrap:wrap;
  margin-bottom:56px;
}
.hero-trust{
  display:flex;
  justify-content:center;
  gap:36px;
  flex-wrap:wrap;
}
.hero-trust span{
  font-size:13px;
  color:var(--text-muted);
  letter-spacing:.4px;
  position:relative;
  padding-left:18px;
}
.hero-trust span::before{
  content:'✓';
  position:absolute;
  left:0;top:-2px;
  color:var(--accent);
  font-weight:700;
  font-size:14px;
}
.hero-scroll{
  position:absolute;
  bottom:32px;
  left:50%;
  transform:translateX(-50%);
  width:24px;height:44px;
  border:2px solid rgba(255,255,255,.25);
  border-radius:14px;
  z-index:3;
}
.hero-scroll::after{
  content:'';
  position:absolute;
  top:8px;left:50%;
  width:4px;height:8px;
  background:var(--accent);
  border-radius:4px;
  transform:translateX(-50%);
  animation:scrollHint 2s infinite;
}
@keyframes scrollHint{
  0%{opacity:1;top:8px;}
  70%{opacity:0;top:22px;}
  100%{opacity:0;top:22px;}
}
/* ===== FEATURES ===== */
.features-section{
  background:var(--bg-secondary);
  overflow:hidden;
}
.features-layout{
  display:grid;
  grid-template-columns:360px 1fr;
  gap:80px;
  align-items:start;
}
.features-sticky{
  position:sticky;
  top:110px;
}
.features-sticky h2{
  font-size:40px;
  font-weight:700;
  line-height:1.3;
  margin-bottom:20px;
}
.features-sticky > p{
  color:var(--text-secondary);
  font-size:16px;
  line-height:1.8;
  margin-bottom:28px;
}
.features-sticky .btn{margin-top:8px;}
.feature-timeline{
  display:flex;
  flex-direction:column;
  gap:56px;
  position:relative;
  padding-left:28px;
}
.feature-timeline::before{
  content:'';
  position:absolute;
  left:0;top:8px;bottom:8px;
  width:1px;
  background:linear-gradient(180deg,var(--primary),var(--accent),transparent);
  opacity:.5;
}
.feature-card{
  position:relative;
  padding:28px 28px 30px;
}
.feature-card::before{
  content:'';
  position:absolute;
  left:-28px;top:34px;
  width:9px;height:9px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 12px rgba(0,212,192,.6);
  border:2px solid var(--bg-secondary);
}
.feature-num{
  display:inline-block;
  font-size:12px;
  font-weight:600;
  letter-spacing:1px;
  color:var(--accent);
  margin-bottom:12px;
  font-variant-numeric:tabular-nums;
}
.feature-card h3{
  font-size:22px;
  font-weight:600;
  margin-bottom:10px;
  color:var(--text-main);
}
.feature-card p{
  font-size:15px;
  color:var(--text-secondary);
  line-height:1.7;
  margin-bottom:16px;
}
.feature-card:hover{
  transform:translateY(-4px);
  border-color:rgba(46,124,246,.35);
  box-shadow:0 0 24px rgba(46,124,246,.12),0 12px 36px rgba(0,0,0,.3);
}
/* ===== PRODUCT DEMO ===== */
.product-section{
  background:var(--bg-base);
}
.product-section .browser-shell{
  border-radius:16px;
  overflow:hidden;
  border:1px solid rgba(255,255,255,.12);
  background:var(--bg-tertiary);
  box-shadow:0 24px 60px rgba(0,0,0,.45);
  margin-bottom:32px;
}
.browser-bar{
  display:flex;
  align-items:center;
  gap:12px;
  padding:14px 20px;
  background:rgba(11,19,39,.9);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.browser-dots{
  display:flex;
  gap:8px;
}
.browser-dots i{
  width:12px;height:12px;
  border-radius:50%;
  background:rgba(255,255,255,.2);
}
.browser-dots i:nth-child(1){background:#FF5F57;}
.browser-dots i:nth-child(2){background:#FEBC2E;}
.browser-dots i:nth-child(3){background:#28C840;}
.browser-address{
  flex:1;
  padding:6px 16px;
  background:rgba(0,0,0,.3);
  border-radius:8px;
  font-size:13px;
  color:var(--text-secondary);
  text-align:center;
  border:1px solid rgba(255,255,255,.06);
}
.browser-body img{
  width:100%;
  height:460px;
  object-fit:cover;
  object-position:top;
}
.demo-cards{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.demo-card{
  padding:22px;
  display:flex;
  gap:16px;
  align-items:center;
  border-radius:var(--radius-md);
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  transition:all var(--transition);
}
.demo-card:hover{
  border-color:rgba(0,212,192,.3);
  background:rgba(255,255,255,.06);
  transform:translateY(-3px);
}
.demo-card img{
  width:56px;height:56px;
  border-radius:12px;
  flex-shrink:0;
}
.demo-card h3{
  font-size:16px;
  font-weight:600;
  color:var(--text-main);
  margin-bottom:4px;
}
.demo-card p{
  font-size:13px;
  color:var(--text-secondary);
  line-height:1.5;
}
/* ===== PROOF ===== */
.proof-section{
  background:var(--bg-tertiary);
  position:relative;
}
.proof-stats{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:32px;
  margin-bottom:64px;
}
.stat-block{
  text-align:center;
  padding:32px 16px;
}
.stat-num{
  font-size:48px;
  font-weight:700;
  color:var(--text-main);
  line-height:1.2;
  font-variant-numeric:tabular-nums;
  margin-bottom:8px;
  display:block;
}
.stat-num .suffix{color:var(--accent);font-size:28px;margin-left:2px;}
.stat-label{
  font-size:14px;
  color:var(--text-secondary);
}
.proof-quote{
  max-width:860px;
  margin:0 auto;
  padding:44px;
  position:relative;
}
.proof-quote::before{
  content:'“';
  position:absolute;
  left:20px;top:10px;
  font-size:90px;
  font-family:Georgia,serif;
  color:var(--accent);
  opacity:.35;
  line-height:1;
}
.proof-quote blockquote{
  font-size:20px;
  color:var(--text-main);
  line-height:1.8;
  padding-left:40px;
  margin-bottom:20px;
}
.proof-quote cite{
  display:block;
  padding-left:40px;
  font-style:normal;
  font-size:14px;
  color:var(--text-muted);
}
.proof-quote cite strong{
  color:var(--text-secondary);
  font-weight:600;
}
/* ===== PRICING ===== */
.pricing-section{
  background:var(--bg-base);
}
.pricing-layout{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:stretch;
  max-width:920px;
  margin:0 auto;
  position:relative;
}
.price-card{
  padding:44px;
  position:relative;
  display:flex;
  flex-direction:column;
  border-radius:var(--radius-lg);
  transition:all var(--transition);
}
.price-card.featured{
  background:linear-gradient(160deg,rgba(46,124,246,.15),rgba(255,255,255,.04) 60%);
  border:1px solid rgba(46,124,246,.4);
  box-shadow:0 0 40px rgba(46,124,246,.2),var(--shadow-card);
  transform:scale(1.02);
}
.price-card.featured:hover{
  transform:scale(1.02) translateY(-4px);
  box-shadow:0 0 50px rgba(46,124,246,.28),0 16px 48px rgba(0,0,0,.4);
}
.price-tag{
  position:absolute;
  top:-14px;right:28px;
  background:var(--amber);
  color:#1a1408;
  font-size:13px;
  font-weight:600;
  padding:4px 14px;
  border-radius:100px;
  box-shadow:0 4px 12px rgba(255,196,97,.3);
}
.price-name{
  font-size:18px;
  font-weight:600;
  color:var(--text-main);
  margin-bottom:12px;
}
.price-desc{
  font-size:14px;
  color:var(--text-secondary);
  margin-bottom:24px;
}
.price-amount{
  font-size:52px;
  font-weight:700;
  color:var(--text-main);
  font-variant-numeric:tabular-nums;
  margin-bottom:8px;
  line-height:1.1;
}
.price-amount .cur{
  font-size:26px;
  vertical-align:super;
  color:var(--text-secondary);
  margin-right:4px;
}
.price-period{
  font-size:14px;
  color:var(--text-muted);
  margin-bottom:28px;
}
.price-features{
  margin-bottom:32px;
  flex:1;
}
.price-features li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  padding:10px 0;
  font-size:15px;
  color:var(--text-secondary);
  border-bottom:1px solid rgba(255,255,255,.05);
}
.price-features li::before{
  content:'✓';
  color:var(--accent);
  font-weight:700;
  font-size:14px;
  flex-shrink:0;
}
.price-features li:last-child{border-bottom:none;}
.price-card .btn{width:100%;}
.price-card.custom{
  background:rgba(255,255,255,.04);
}
.price-card.custom .price-amount{
  font-size:36px;
  line-height:1.3;
}
.price-card.custom .price-amount .cur{
  font-size:22px;
}
/* ===== NEWS ===== */
.news-section{
  background:var(--bg-secondary);
}
.news-list{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.news-item{
  display:flex;
  gap:20px;
  padding:18px;
  border-radius:var(--radius-md);
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.08);
  transition:all var(--transition);
}
.news-item:hover{
  border-color:rgba(46,124,246,.3);
  background:rgba(255,255,255,.06);
  transform:translateY(-3px);
  box-shadow:0 8px 28px rgba(0,0,0,.25);
}
.news-thumb{
  width:140px;
  min-width:140px;
  height:96px;
  border-radius:10px;
  overflow:hidden;
  display:block;
}
.news-thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.news-item:hover .news-thumb img{
  transform:scale(1.04);
}
.news-body{
  flex:1;
  min-width:0;
}
.news-badge{
  display:inline-block;
  background:rgba(46,124,246,.12);
  color:var(--primary);
  border-radius:4px;
  padding:2px 8px;
  font-size:12px;
  margin-bottom:8px;
  font-weight:500;
}
.news-body h3{
  font-size:16px;
  font-weight:600;
  line-height:1.5;
  margin-bottom:6px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.news-body h3 a{
  color:var(--text-main);
}
.news-body h3 a:hover{
  color:var(--accent);
}
.news-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;
  justify-content:space-between;
  gap:8px;
}
.news-meta time{
  font-size:12px;
  color:var(--text-muted);
  font-variant-numeric:tabular-nums;
}
.news-more{
  font-size:12px;
  color:var(--accent);
  white-space:nowrap;
}
.news-more:hover{color:#fff;}
.empty-state{
  grid-column:1/-1;
  border:1px dashed rgba(255,255,255,.15);
  border-radius:var(--radius-md);
  padding:64px 24px;
  text-align:center;
  color:var(--text-muted);
  font-size:15px;
  background:rgba(255,255,255,.02);
}
/* ===== FAQ ===== */
.faq-section{
  background:var(--bg-base);
}
.faq-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:32px;
}
.faq-col{
  display:flex;
  flex-direction:column;
  gap:16px;
}
.faq-item{
  border-radius:var(--radius-md);
  border:1px solid rgba(255,255,255,.08);
  background:rgba(255,255,255,.03);
  overflow:hidden;
  transition:border-color .3s,background .3s;
}
.faq-item.active{
  border-color:rgba(0,212,192,.25);
  background:rgba(255,255,255,.06);
}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 22px;
  background:transparent;
  border:none;
  cursor:pointer;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--text-main);
  transition:color .3s;
}
.faq-q .faq-q-mark{
  flex-shrink:0;
  width:24px;height:24px;
  border-radius:50%;
  background:rgba(0,212,192,.1);
  color:var(--accent);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:18px;
  font-weight:400;
  transition:transform .3s,background .3s;
}
.faq-item.active .faq-q .faq-q-mark{
  transform:rotate(45deg);
  background:rgba(0,212,192,.22);
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease;
}
.faq-item.active .faq-a{
  max-height:300px;
}
.faq-a p{
  padding:0 22px 20px;
  font-size:15px;
  color:var(--text-secondary);
  line-height:1.7;
  border-top:1px solid rgba(255,255,255,.05);
  margin-top:-4px;
  padding-top:16px;
}
/* ===== CONTACT / CTA ===== */
.contact-section{
  background:var(--bg-tertiary);
  position:relative;
  overflow:hidden;
}
.contact-section::before{
  content:'';
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  opacity:.3;
  z-index:0;
}
.contact-section .container{
  position:relative;
  z-index:1;
}
.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:80px;
  align-items:center;
}
.contact-info h2{
  font-size:40px;
  line-height:1.3;
  font-weight:700;
  margin-bottom:20px;
}
.contact-info > p{
  font-size:17px;
  color:var(--text-secondary);
  line-height:1.8;
  margin-bottom:32px;
}
.contact-points li{
  display:flex;
  gap:14px;
  align-items:flex-start;
  padding:10px 0;
  color:var(--text-secondary);
  font-size:15px;
}
.contact-points li i{
  color:var(--accent);
  font-style:normal;
  font-weight:700;
  font-size:16px;
  line-height:1.6;
}
.contact-form-wrap{
  padding:40px;
  background:rgba(255,255,255,.05);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.12);
  border-top-color:rgba(255,255,255,.2);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
}
.contact-form-wrap h3{
  font-size:22px;
  font-weight:600;
  margin-bottom:24px;
  color:var(--text-main);
}
.form-group{
  margin-bottom:18px;
}
.form-group label{
  display:block;
  font-size:12px;
  letter-spacing:.3px;
  color:var(--text-secondary);
  margin-bottom:6px;
  font-weight:500;
}
.form-group input,
.form-group select,
.form-group textarea{
  width:100%;
  padding:0 16px;
  height:48px;
  border-radius:10px;
  background:rgba(0,0,0,.2);
  border:1px solid rgba(255,255,255,.12);
  color:var(--text-main);
  font-size:15px;
  outline:none;
  transition:border-color .25s,box-shadow .25s;
  appearance:none;
  -webkit-appearance:none;
}
.form-group select{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%239DB0C7' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 16px center;
}
.form-group textarea{
  height:auto;
  padding:14px 16px;
  resize:vertical;
  min-height:90px;
}
.form-group input::placeholder,
.form-group textarea::placeholder{
  color:rgba(102,120,143,.7);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus{
  border-color:var(--accent);
  box-shadow:0 0 0 4px rgba(0,212,192,.12);
}
.form-group input.error,
.form-group textarea.error{
  border-color:var(--error);
}
.form-group .error-msg{
  display:block;
  font-size:12px;
  color:var(--error);
  margin-top:4px;
  min-height:0;
}
.contact-form-wrap .btn{
  width:100%;
  min-height:52px;
  margin-top:8px;
}
/* ===== FOOTER ===== */
.site-footer{
  background:#050912;
  border-top:1px solid rgba(255,255,255,.06);
  padding-top:64px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:48px;
  padding-bottom:48px;
}
.footer-brand .brand-name{
  font-size:22px;
  margin-bottom:12px;
}
.footer-brand > p{
  font-size:14px;
  color:var(--text-muted);
  line-height:1.7;
  max-width:280px;
}
.footer-col h4{
  font-size:15px;
  font-weight:600;
  color:var(--text-main);
  margin-bottom:16px;
  letter-spacing:.3px;
}
.footer-col ul li{
  line-height:32px;
}
.footer-col ul a{
  font-size:14px;
  color:var(--text-secondary);
}
.footer-col ul a:hover{
  color:var(--accent);
}
.footer-col p{
  font-size:14px;
  color:var(--text-secondary);
  line-height:1.7;
  margin-bottom:6px;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.05);
  padding:22px 0;
  text-align:center;
}
.footer-bottom p{
  font-size:13px;
  color:var(--text-muted);
}
/* ===== FLOAT CTA ===== */
.float-cta{
  position:fixed;
  right:32px;
  bottom:36px;
  z-index:900;
  width:56px;
  height:56px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--accent),#0aa98d);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:24px;
  box-shadow:0 0 24px rgba(0,212,192,.5),0 6px 18px rgba(0,0,0,.3);
  opacity:0;
  transform:translateY(20px);
  visibility:hidden;
  transition:opacity .35s,transform .35s,visibility .35s;
  animation:pulse 2.5s infinite;
}
.float-cta:hover{
  background:linear-gradient(135deg,#00e8d2,#0a8a72);
  transform:translateY(-2px) scale(1.05);
  box-shadow:0 0 34px rgba(0,212,192,.65),0 8px 24px rgba(0,0,0,.3);
}
.float-cta.visible{
  opacity:1;
  transform:translateY(0);
  visibility:visible;
}
@keyframes pulse{
  0%,100%{box-shadow:0 0 24px rgba(0,212,192,.5),0 6px 18px rgba(0,0,0,.3);}
  50%{box-shadow:0 0 36px rgba(0,212,192,.7),0 6px 18px rgba(0,0,0,.3);}
}
/* ===== RESPONSIVE ===== */
@media (max-width:1024px){
  .container{padding:0 32px;}
  .nav-inner{padding:0 32px;}
  .features-layout{grid-template-columns:1fr;gap:48px;}
  .features-sticky{position:static;}
  .proof-stats{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .contact-grid{grid-template-columns:1fr;gap:48px;}
}
@media (max-width:768px){
  body{font-size:16px;}
  .container{padding:0 20px;}
  .nav-inner{padding:0 20px;}
  .site-nav{height:60px;}
  .nav-links{
    position:fixed;
    top:60px;right:0;bottom:0;
    width:280px;
    background:rgba(7,12,26,.95);
    backdrop-filter:blur(20px);
    -webkit-backdrop-filter:blur(20px);
    flex-direction:column;
    align-items:flex-start;
    padding:24px 20px;
    gap:16px;
    border-left:1px solid rgba(255,255,255,.08);
    transform:translateX(100%);
    transition:transform .35s ease;
    overflow-y:auto;
    z-index:999;
  }
  .nav-links.open{
    transform:translateX(0);
  }
  .nav-links a{
    font-size:18px;
    padding:12px 16px;
    width:100%;
  }
  .nav-links a.active::after{
    left:16px;right:auto;width:32px;
  }
  .nav-toggle{
    display:flex;
    align-items:center;
  }
  .nav-cta{
    margin-right:8px;
  }
  .nav-cta .btn{
    min-height:40px;
    padding:0 16px;
    font-size:14px;
  }
  .section{padding:72px 0;}
  .section-head h2{font-size:28px;}
  .hero{padding:120px 0 60px;min-height:auto;}
  .hero h1{font-size:36px;}
  .hero-desc{font-size:17px;}
  .hero-trust{gap:20px;}
  .hero-scroll{display:none;}
  .demo-cards{grid-template-columns:1fr;}
  .pricing-layout{grid-template-columns:1fr;}
  .price-card{padding:32px 24px;}
  .price-card.featured{transform:none;}
  .price-card.featured:hover{transform:translateY(-4px);}
  .news-list{grid-template-columns:1fr;}
  .news-item{flex-direction:row;}
  .news-thumb{width:96px;min-width:96px;height:72px;}
  .faq-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-brand > p{max-width:none;}
  .contact-form-wrap{padding:28px 20px;}
  .float-cta{right:20px;bottom:24px;width:52px;height:52px;font-size:20px;}
}
@media (max-width:520px){
  .brand-name{font-size:17px;}
  .brand-mark{width:32px;height:32px;font-size:15px;border-radius:8px;}
  .hero h1{font-size:30px;line-height:1.25;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .hero-trust{justify-content:flex-start;flex-direction:column;gap:12px;}
  .proof-stats{grid-template-columns:1fr 1fr;gap:12px;}
  .stat-num{font-size:34px;}
  .stat-num .suffix{font-size:20px;}
  .proof-quote{padding:28px 20px;}
  .proof-quote blockquote{font-size:17px;padding-left:20px;}
  .proof-quote cite{padding-left:20px;font-size:13px;}
  .news-item{flex-direction:column;}
  .news-thumb{width:100%;min-width:0;height:140px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .price-card{padding:28px 20px;}
}

/* roulang page: category1 */
:root {
  --primary: #2E7CF6;
  --primary-dark: #1F66E0;
  --primary-active: #1752B8;
  --accent: #00D4C0;
  --amber: #FFC461;
  --bg-base: #070C1A;
  --bg-secondary: #0B1327;
  --bg-alt: #0E1930;
  --text-main: #E6EDF7;
  --text-secondary: #9DB0C7;
  --text-muted: #66788F;
  --error: #FF5D6C;
  --success: #00D4C0;
  --warning: #FFC461;
  --glass-bg: rgba(255,255,255,0.05);
  --glass-border: rgba(255,255,255,0.12);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 8px;
  --shadow-glow: 0 0 24px rgba(46,124,246,0.45), 0 4px 12px rgba(0,0,0,0.3);
  --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
  --transition: 0.25s ease;
  --nav-height: 72px;
  --container-w: 1280px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-base);
  color: var(--text-main);
  font-size: 17px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(600px 400px at 12% 8%, rgba(46,124,246,0.28), transparent 70%),
    radial-gradient(700px 500px at 88% 92%, rgba(0,212,192,0.18), transparent 70%),
    radial-gradient(400px 300px at 70% 20%, rgba(255,196,97,0.05), transparent 60%),
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: auto, auto, auto, 60px 60px, 60px 60px;
  pointer-events: none;
  z-index: 0;
}

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

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

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  line-height: 1.3;
  font-weight: 700;
}

h1 {
  font-size: 56px;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

h2 {
  font-size: 40px;
  letter-spacing: -0.3px;
}

h3 {
  font-size: 24px;
  font-weight: 600;
}

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 48px;
  position: relative;
  z-index: 1;
}

.section {
  padding: 96px 0;
  position: relative;
  z-index: 1;
}

.section-alt {
  background: var(--bg-secondary);
}

.section-head {
  margin-bottom: 48px;
  max-width: 720px;
}

.section-head .section-tag {
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: inline-block;
}

.section-head p {
  color: var(--text-secondary);
  font-size: 17px;
  margin-top: 16px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  min-height: 52px;
  padding: 0 32px;
  font-size: 16px;
  line-height: 1;
  gap: 8px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 0 24px rgba(46,124,246,0.45), 0 4px 12px rgba(0,0,0,0.3);
  position: relative;
  overflow: hidden;
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(255,255,255,0.3);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 0 32px rgba(46,124,246,0.6), 0 6px 16px rgba(0,0,0,0.35);
}

.btn-primary:active {
  transform: translateY(1px);
  background: var(--primary-active);
  box-shadow: 0 0 16px rgba(46,124,246,0.3);
}

.btn-primary:focus-visible,
.btn-ghost:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.btn-ghost {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--text-main);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.btn-ghost:hover {
  border-color: rgba(0,212,192,0.6);
  color: #fff;
  background: rgba(255,255,255,0.08);
  transform: translateY(-1px);
}

.btn-ghost:active {
  transform: translateY(1px);
}

/* 导航 */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(7,12,26,0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: background 0.3s ease, box-shadow 0.3s ease, border-bottom 0.3s ease;
  border-bottom: 1px solid transparent;
}

.site-nav.scrolled {
  background: rgba(7,12,26,0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.nav-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 48px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  box-shadow: 0 0 20px rgba(46,124,246,0.4);
}

.brand-name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.2px;
  color: var(--text-main);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
}

.nav-links li a {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  transition: all 0.25s ease;
}

.nav-links li a:hover {
  color: var(--primary);
  background: rgba(46,124,246,0.1);
}

.nav-links li a.active {
  color: var(--accent);
  background: rgba(0,212,192,0.08);
}

.nav-links li a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.nav-cta {
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.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);
}

/* 移动端导航抽屉 */
.mobile-nav {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 320px;
  max-width: 85vw;
  background: rgba(7,12,26,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1100;
  padding: 80px 32px 32px;
  transform: translateX(100%);
  transition: transform 0.35s ease;
  border-left: 1px solid rgba(255,255,255,0.08);
  overflow-y: auto;
}

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

.mobile-nav .nav-links {
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
}

.mobile-nav .nav-links li a {
  padding: 14px 16px;
  font-size: 18px;
  display: block;
  border-radius: 12px;
  color: var(--text-main);
}

.mobile-nav .nav-links li a.active {
  color: var(--accent);
  background: rgba(0,212,192,0.1);
}

.mobile-nav .nav-links li a::after {
  display: none;
}

.mobile-nav .nav-cta {
  display: flex;
  margin-top: 24px;
  min-height: 48px;
  width: 100%;
}

.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 1050;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.nav-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

/* Hero */
.page-hero {
  position: relative;
  padding: 160px 0 80px;
  overflow: hidden;
  background-color: var(--bg-base);
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity: 0.5;
}

.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(7,12,26,0.92) 20%, rgba(7,12,26,0.55) 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 48px;
  min-height: 320px;
}

.hero-content {
  flex: 0 0 55%;
  max-width: 640px;
}

.hero-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

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

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

.hero-breadcrumb .sep {
  color: var(--text-muted);
}

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

.hero-content h1 {
  color: transparent;
  background: linear-gradient(135deg, #fff 30%, #BFD0E8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  margin-bottom: 20px;
}

.hero-content .hero-sub {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 580px;
  margin-bottom: 32px;
  line-height: 1.8;
}

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

.hero-tags {
  display: flex;
  gap: 12px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.hero-tags .mini-tag {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-secondary);
  letter-spacing: 0.3px;
}

/* 标签 */
.tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 0.4px;
}

.tag-blue {
  background: rgba(46,124,246,0.15);
  color: var(--primary);
  border: 1px solid rgba(46,124,246,0.3);
}

.tag-teal {
  background: rgba(0,212,192,0.12);
  color: var(--accent);
  border: 1px solid rgba(0,212,192,0.25);
}

.tag-amber {
  background: rgba(255,196,97,0.12);
  color: var(--amber);
  border: 1px solid rgba(255,196,97,0.25);
}

/* 子主题卡片（错位双列） */
.theme-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.theme-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-top: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
  position: relative;
}

.theme-card:hover {
  transform: translateY(-4px);
  border-color: rgba(46,124,246,0.4);
  box-shadow: 0 12px 40px rgba(46,124,246,0.15), 0 8px 32px rgba(0,0,0,0.3);
}

.theme-card--right {
  margin-top: 64px;
}

.theme-card--left {
  margin-top: 0;
}

.theme-card:nth-child(3) {
  margin-top: 0;
}

.theme-card .card-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(46,124,246,0.2), rgba(0,212,192,0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  border: 1px solid rgba(46,124,246,0.2);
}

.theme-card .card-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-card h3 {
  font-size: 22px;
  margin-bottom: 12px;
}

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

.theme-card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--primary);
  margin-top: 20px;
  font-weight: 500;
  transition: all 0.25s ease;
}

.theme-card .card-link:hover {
  color: var(--accent);
  gap: 10px;
}

.theme-card .card-link svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.25s ease;
}

/* 数据墙 */
.stats-band {
  background: var(--bg-alt);
  border-top: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  padding: 64px 0;
}

.stats-grid {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
  flex: 1;
  min-width: 160px;
}

.stat-item .stat-num {
  font-size: 42px;
  font-weight: 700;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
  display: block;
  margin-bottom: 8px;
}

.stat-item .stat-num span {
  color: var(--accent);
}

.stat-item .stat-label {
  font-size: 14px;
  color: var(--text-secondary);
}

/* 服务流程时间线 */
.process-list {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.process-list::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  transform: translateX(-50%);
  border-radius: 2px;
}

.process-item {
  position: relative;
  display: flex;
  align-items: flex-start;
  margin-bottom: 48px;
  width: 50%;
  padding-right: 40px;
}

.process-item:nth-child(odd) {
  left: 0;
  padding-right: 56px;
  text-align: right;
}

.process-item:nth-child(even) {
  left: 50%;
  padding-left: 56px;
  padding-right: 0;
}

.process-dot {
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg-base);
  box-shadow: 0 0 20px rgba(0,212,192,0.6);
  top: 8px;
}

.process-item:nth-child(odd) .process-dot {
  right: -8px;
}

.process-item:nth-child(even) .process-dot {
  left: -8px;
}

.process-content {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 28px 32px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition);
}

.process-content:hover {
  border-color: rgba(0,212,192,0.4);
  background: rgba(255,255,255,0.07);
}

.process-content .process-step {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.4px;
  margin-bottom: 8px;
}

.process-content h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.process-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 场景列表卡 */
.scene-card {
  display: flex;
  align-items: center;
  gap: 24px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-top: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 24px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: all var(--transition);
}

.scene-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,212,192,0.35);
  box-shadow: 0 12px 32px rgba(0,0,0,0.3), 0 0 24px rgba(0,212,192,0.08);
}

.scene-card .scene-img {
  flex-shrink: 0;
  width: 160px;
  height: 112px;
  border-radius: 12px;
  overflow: hidden;
  background: #111C33;
  position: relative;
}

.scene-card .scene-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.scene-card:hover .scene-img img {
  transform: scale(1.03);
}

.scene-card .scene-body {
  flex: 1;
  min-width: 0;
}

.scene-card .scene-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.scene-card .scene-date {
  font-size: 13px;
  color: var(--text-muted);
}

.scene-card h3 {
  font-size: 18px;
  margin-bottom: 6px;
  transition: color var(--transition);
}

.scene-card:hover h3 {
  color: var(--accent);
}

.scene-card .scene-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.scene-card .scene-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--primary);
  margin-top: 10px;
  font-weight: 500;
}

.scene-card .scene-link:hover {
  color: var(--accent);
  gap: 10px;
}

.scene-card .scene-link svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.25s ease;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 16px;
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  overflow: hidden;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.faq-item.open {
  background: rgba(255,255,255,0.08);
  border-color: rgba(0,212,192,0.3);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 28px;
  cursor: pointer;
  min-height: 60px;
}

.faq-question .q-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
}

.faq-question .q-prefix {
  color: var(--accent);
  font-weight: 700;
  margin-right: 8px;
}

.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  width: 12px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.faq-icon {
  position: relative;
}

.faq-icon::after {
  transform: rotate(90deg);
}

.faq-item.open .faq-icon::after {
  transform: rotate(0deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer-inner {
  padding: 0 28px 24px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 16px;
}

.faq-answer-inner .a-prefix {
  color: var(--accent);
  font-weight: 700;
  margin-right: 8px;
}

/* CTA */
.cta-section {
  padding: 96px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  opacity: 0.4;
}

.cta-section::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(7,12,26,0.95) 20%, rgba(11,19,39,0.8) 100%);
}

.cta-box {
  position: relative;
  z-index: 2;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-top: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--radius-lg);
  padding: 56px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.cta-box h2 {
  font-size: 32px;
  margin-bottom: 12px;
}

.cta-box p {
  color: var(--text-secondary);
  font-size: 16px;
  max-width: 520px;
}

.cta-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

/* 页脚 */
.site-footer {
  background: #050912;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 64px;
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .brand-name {
  font-size: 22px;
  margin-bottom: 12px;
  display: block;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
  max-width: 320px;
}

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

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul li a {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 32px;
  transition: all 0.25s ease;
}

.footer-col ul li a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-col p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 32px;
  margin: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 24px 0;
}

.footer-bottom .container {
  display: flex;
  justify-content: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  margin: 0;
}

/* 浮动按钮 */
.scroll-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(46,124,246,0.9);
  border: 1px solid rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s ease;
  box-shadow: 0 0 24px rgba(46,124,246,0.45);
}

.scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.scroll-top:hover {
  background: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(0,212,192,0.5);
}

.scroll-top svg {
  width: 22px;
  height: 22px;
  stroke: #fff;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* 响应式 */
@media (max-width: 1024px) {
  .page-hero {
    padding: 130px 0 64px;
  }

  .hero-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-content {
    flex: 1;
    max-width: 100%;
  }

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

@media (max-width: 768px) {
  .container {
    padding: 0 32px;
  }

  .nav-inner {
    padding: 0 32px;
  }

  .nav-links {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .section {
    padding: 64px 0;
  }

  h1 {
    font-size: 36px;
  }

  h2 {
    font-size: 28px;
  }

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

  .theme-card--right {
    margin-top: 0;
  }

  .process-list::before {
    left: 12px;
  }

  .process-item,
  .process-item:nth-child(odd),
  .process-item:nth-child(even) {
    width: 100%;
    left: 0;
    padding: 0 0 0 40px;
    text-align: left;
  }

  .process-item .process-dot,
  .process-item:nth-child(odd) .process-dot,
  .process-item:nth-child(even) .process-dot {
    left: 4px;
    right: auto;
    width: 16px;
    height: 16px;
  }

  .process-item:nth-child(odd) {
    padding-right: 0;
  }

  .process-item:nth-child(even) {
    padding-left: 40px;
  }

  .scene-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .scene-card .scene-img {
    width: 100%;
    height: 160px;
  }

  .stats-grid {
    gap: 24px;
  }

  .stat-item {
    min-width: 45%;
  }

  .stat-item .stat-num {
    font-size: 32px;
  }

  .cta-box {
    flex-direction: column;
    padding: 36px 28px;
    text-align: center;
  }

  .cta-actions {
    justify-content: center;
  }

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

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

@media (max-width: 520px) {
  .container {
    padding: 0 20px;
  }

  .nav-inner {
    padding: 0 20px;
  }

  .brand-name {
    font-size: 16px;
  }

  .brand-mark {
    width: 32px;
    height: 32px;
    font-size: 16px;
  }

  .page-hero {
    padding: 110px 0 48px;
  }

  .hero-content h1 {
    font-size: 30px;
  }

  .hero-content .hero-sub {
    font-size: 16px;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
    min-height: 48px;
  }

  .theme-card {
    padding: 28px 24px;
  }

  .process-content {
    padding: 20px;
  }

  .cta-box {
    padding: 32px 20px;
  }

  .cta-box h2 {
    font-size: 26px;
  }

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

@media (min-width: 769px) {
  .mobile-nav,
  .nav-overlay {
    display: none !important;
  }
}

/* roulang page: article */
:root {
  --primary: #2E7CF6;
  --primary-dark: #1F66E0;
  --primary-active: #1752B8;
  --accent: #00D4C0;
  --amber: #FFC461;
  --bg-deep: #070C1A;
  --bg-dark: #0B1327;
  --bg-alt: #0E1930;
  --text-main: #E6EDF7;
  --text-sub: #9DB0C7;
  --text-weak: #66788F;
  --error: #FF5D6C;
  --success: #00D4C0;
  --warning: #FFC461;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-sm: 8px;
  --shadow-glow: 0 0 24px rgba(46, 124, 246, 0.45);
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.12);
  --font-family: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --container-w: 1280px;
  --spacing-section: 96px;
  --spacing-section-md: 56px;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-family);
  background: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
body.no-scroll {
  overflow: hidden;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.25s ease;
}
a:hover {
  color: var(--accent);
}
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}
ul, ol {
  list-style: none;
}
.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding-left: 48px;
  padding-right: 48px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  line-height: 1.4;
  text-align: center;
  min-height: 44px;
  padding: 0 24px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-glow), 0 4px 12px rgba(0, 0, 0, 0.3);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 0 32px rgba(46, 124, 246, 0.55), 0 6px 16px rgba(0, 0, 0, 0.35);
  color: #fff;
}
.btn-primary:active {
  background: var(--primary-active);
  transform: translateY(1px);
  box-shadow: 0 0 16px rgba(46, 124, 246, 0.35), 0 2px 6px rgba(0, 0, 0, 0.3);
}
.btn-outline {
  background: var(--glass-bg);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-main);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: #fff;
  background: rgba(0, 212, 192, 0.08);
}
.btn-outline:active {
  background: rgba(0, 212, 192, 0.15);
}
.btn-block {
  width: 100%;
}
.btn-search {
  min-height: 32px;
  padding: 0 16px;
  font-size: 13px;
}
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 72px;
  background: rgba(7, 12, 26, 0.65);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.site-nav.scrolled {
  background: rgba(7, 12, 26, 0.75);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}
.nav-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 48px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  box-shadow: 0 0 18px rgba(46, 124, 246, 0.4);
}
.brand-name {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.2px;
  line-height: 1.2;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-links a {
  display: block;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  border-radius: 8px;
  position: relative;
  transition: color 0.25s ease, background 0.25s ease;
}
.nav-links a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}
.nav-links a.active {
  color: var(--accent);
}
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}
.nav-cta {
  flex-shrink: 0;
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  width: 44px;
  height: 44px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--text-main);
  transition: all 0.3s ease;
}
.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);
}
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 320px;
  max-width: 85vw;
  background: rgba(7, 12, 26, 0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  z-index: 1100;
  padding: 80px 32px 32px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.mobile-menu.open {
  transform: translateX(0);
}
.mobile-menu a {
  font-size: 18px;
  color: var(--text-main);
  padding: 14px 12px;
  border-radius: 10px;
  transition: background 0.25s ease, color 0.25s ease;
}
.mobile-menu a:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--accent);
}
.mobile-menu a.active {
  color: var(--accent);
  background: rgba(0, 212, 192, 0.08);
}
.mobile-menu .btn {
  margin-top: 16px;
  width: 100%;
}
.menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease;
}
.menu-overlay.open {
  opacity: 1;
  visibility: visible;
}

.article-hero {
  padding-top: 140px;
  padding-bottom: 64px;
  background-image: linear-gradient(rgba(7, 12, 26, 0.65), rgba(7, 12, 26, 0.85)), url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  position: relative;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.article-hero::before {
  content: '';
  position: absolute;
  top: -120px;
  left: -80px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(46, 124, 246, 0.18) 0%, transparent 70%);
  pointer-events: none;
}
.article-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: -60px;
  width: 420px;
  height: 320px;
  background: radial-gradient(circle, rgba(0, 212, 192, 0.12) 0%, transparent 70%);
  pointer-events: none;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 14px;
  color: var(--text-weak);
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}
.breadcrumb a {
  color: var(--text-sub);
  transition: color 0.25s ease;
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb .sep {
  color: var(--text-weak);
  font-size: 12px;
}
.breadcrumb .current {
  color: var(--text-weak);
  max-width: 240px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.article-hero-title {
  font-size: 56px;
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: transparent;
  background: linear-gradient(135deg, #ffffff 30%, #BFD0E8 90%);
  -webkit-background-clip: text;
  background-clip: text;
  max-width: 900px;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}
.article-hero-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  position: relative;
  z-index: 1;
}
.article-hero-meta .cat-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(0, 212, 192, 0.12);
  border: 1px solid rgba(0, 212, 192, 0.25);
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
}
.article-hero-meta .date-text {
  font-size: 14px;
  color: var(--text-sub);
}

.article-section {
  padding: 80px 0 96px;
  background: var(--bg-deep);
}
.article-layout {
  max-width: 960px;
  margin: 0 auto;
}
.article-body {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 48px 56px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
}
.article-body > * + * {
  margin-top: 24px;
}
.article-body p {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-main);
  margin-bottom: 24px;
}
.article-body h2 {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.3;
  color: #fff;
  margin-top: 48px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.article-body h3 {
  font-size: 22px;
  font-weight: 600;
  line-height: 1.4;
  color: #fff;
  margin-top: 36px;
  margin-bottom: 14px;
}
.article-body h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  margin-top: 28px;
  margin-bottom: 12px;
}
.article-body ul {
  margin: 24px 0;
  padding: 0;
}
.article-body ul li {
  padding-left: 28px;
  position: relative;
  margin-bottom: 10px;
  color: var(--text-sub);
  font-size: 16px;
}
.article-body ul li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 11px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}
.article-body ol {
  margin: 24px 0;
  padding-left: 24px;
}
.article-body ol li {
  margin-bottom: 10px;
  color: var(--text-sub);
  font-size: 16px;
  list-style: decimal;
}
.article-body blockquote {
  border-left: 4px solid var(--accent);
  background: rgba(0, 212, 192, 0.06);
  padding: 24px 28px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 32px 0;
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.7;
}
.article-body blockquote p {
  margin-bottom: 0;
  color: var(--text-sub);
}
.article-body img {
  border-radius: 12px;
  margin: 32px 0;
  width: 100%;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 32px 0;
  border-radius: 12px;
  overflow: hidden;
  font-size: 15px;
}
.article-body table th {
  background: #13203A;
  color: #fff;
  padding: 14px 16px;
  text-align: left;
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.article-body table td {
  background: rgba(255, 255, 255, 0.02);
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-sub);
}
.article-body table tr:last-child td {
  border-bottom: none;
}
.article-body table tr:hover td {
  background: rgba(46, 124, 246, 0.08);
}
.article-body code {
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 8px;
  border-radius: 6px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 14px;
  color: var(--accent);
}
.article-body pre {
  background: var(--bg-dark);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 24px;
  overflow-x: auto;
  margin: 32px 0;
  line-height: 1.6;
}
.article-body pre code {
  background: none;
  padding: 0;
  color: var(--text-main);
}
.article-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}
.article-not-found {
  text-align: center;
  padding: 80px 24px;
  background: var(--glass-bg);
  border: 1px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
}
.article-not-found h2 {
  font-size: 28px;
  color: var(--text-main);
  margin-bottom: 12px;
}
.article-not-found p {
  color: var(--text-sub);
  margin-bottom: 32px;
}

.related-section {
  padding: 56px 0 96px;
  background: var(--bg-dark);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}
.section-label {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.4px;
  color: var(--accent);
  text-transform: none;
  margin-bottom: 8px;
  display: inline-block;
}
.related-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
}
.related-header h2 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  color: #fff;
}
.related-header .link-more {
  font-size: 14px;
  color: var(--text-sub);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.25s ease;
}
.related-header .link-more:hover {
  color: var(--accent);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.related-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  overflow: hidden;
  padding: 0;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(46, 124, 246, 0.18);
  border-color: rgba(46, 124, 246, 0.35);
}
.related-card .cover-wrap {
  height: 200px;
  overflow: hidden;
  position: relative;
}
.related-card .cover-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.related-card:hover .cover-wrap img {
  transform: scale(1.04);
}
.related-card .cover-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(7, 12, 26, 0.7));
}
.related-card .card-body {
  padding: 24px 24px 28px;
}
.related-card .cat-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  background: rgba(0, 212, 192, 0.1);
  border: 1px solid rgba(0, 212, 192, 0.2);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 12px;
}
.related-card h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text-main);
  margin-bottom: 10px;
  transition: color 0.25s ease;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card:hover h3 {
  color: var(--accent);
}
.related-card .card-summary {
  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: 16px;
}
.related-card .card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.related-card .card-date {
  font-size: 13px;
  color: var(--text-weak);
  font-variant-numeric: tabular-nums;
}
.related-card .read-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.related-card .read-link:hover {
  color: var(--accent);
}
.article-back {
  margin-top: 56px;
  text-align: center;
}
.article-back a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  padding: 12px 28px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: var(--glass-bg);
  transition: all 0.25s ease;
}
.article-back a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.cta-section {
  padding: 96px 0;
  background: var(--bg-alt);
  position: relative;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 10% 0%, rgba(46, 124, 246, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 90% 100%, rgba(0, 212, 192, 0.1) 0%, transparent 50%);
  pointer-events: none;
}
.cta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.cta-copy h2 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.25;
  color: #fff;
  margin-bottom: 20px;
}
.cta-copy p {
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 480px;
}
.cta-points {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.cta-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-sub);
}
.cta-points li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.cta-form-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
}
.cta-form-card h3 {
  font-size: 22px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
}
.cta-form-card .form-tip {
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 28px;
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-sub);
  letter-spacing: 0.3px;
  margin-bottom: 8px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  min-height: 48px;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: 0 16px;
  color: var(--text-main);
  font-size: 15px;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.form-group textarea {
  padding-top: 12px;
  resize: vertical;
  min-height: 100px;
}
.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239DB0C7' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  cursor: pointer;
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-weak);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(0, 212, 192, 0.12);
}
.form-group input.error,
.form-group select.error,
.form-group textarea.error {
  border-color: var(--error);
}
.form-group .error-msg {
  display: block;
  font-size: 12px;
  color: var(--error);
  margin-top: 6px;
  min-height: 16px;
}
.form-status {
  display: none;
  text-align: center;
  font-size: 14px;
  margin-top: 14px;
  padding: 10px;
  border-radius: 8px;
}
.form-status.success {
  display: block;
  color: var(--success);
  background: rgba(0, 212, 192, 0.08);
  border: 1px solid rgba(0, 212, 192, 0.2);
}
.form-status.error {
  display: block;
  color: var(--error);
  background: rgba(255, 93, 108, 0.08);
  border: 1px solid rgba(255, 93, 108, 0.2);
}

.site-footer {
  background: #050912;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .brand-name {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
  display: block;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 320px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.footer-col ul li a {
  display: inline-block;
  font-size: 14px;
  color: var(--text-sub);
  padding: 6px 0;
  transition: color 0.25s ease, padding-left 0.25s ease;
}
.footer-col ul li a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-col p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 2;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-weak);
}

@media (max-width: 1024px) {
  .container {
    padding-left: 32px;
    padding-right: 32px;
  }
  .nav-inner {
    padding: 0 32px;
  }
  .article-hero-title {
    font-size: 42px;
  }
  .article-hero {
    padding-top: 120px;
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cta-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .cta-copy p {
    max-width: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .article-body {
    padding: 36px 32px;
  }
}
@media (max-width: 767px) {
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }
  .nav-inner {
    padding: 0 20px;
  }
  .nav-links,
  .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .article-hero {
    padding-top: 100px;
    padding-bottom: 48px;
  }
  .article-hero-title {
    font-size: 32px;
  }
  .article-hero-meta {
    gap: 12px;
  }
  .article-section {
    padding: 48px 0 64px;
  }
  .article-layout {
    max-width: 100%;
  }
  .article-body {
    padding: 28px 20px;
    border-radius: var(--radius);
  }
  .article-body p {
    font-size: 16px;
  }
  .article-body h2 {
    font-size: 24px;
  }
  .article-body h3 {
    font-size: 20px;
  }
  .related-section {
    padding: 48px 0 64px;
  }
  .related-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 28px;
  }
  .related-header h2 {
    font-size: 28px;
  }
  .related-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .related-card .cover-wrap {
    height: 180px;
  }
  .cta-section {
    padding: 64px 0;
  }
  .cta-copy h2 {
    font-size: 28px;
  }
  .cta-form-card {
    padding: 28px 20px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 32px;
  }
  .breadcrumb .current {
    max-width: 140px;
  }
}
@media (max-width: 520px) {
  .article-hero-title {
    font-size: 28px;
  }
  .related-card .cover-wrap {
    height: 160px;
  }
  .btn {
    min-height: 44px;
  }
}

/* roulang page: category2 */
:root {
  --primary: #2E7CF6;
  --primary-hover: #1F66E0;
  --primary-active: #1752B8;
  --accent: #00D4C0;
  --amber: #FFC461;
  --bg-base: #070C1A;
  --bg-secondary: #0B1327;
  --bg-tertiary: #0E1930;
  --text-main: #E6EDF7;
  --text-secondary: #9DB0C7;
  --text-muted: #66788F;
  --border-light: rgba(255,255,255,0.08);
  --glass-bg: rgba(255,255,255,0.05);
  --glass-highlight: rgba(255,255,255,0.12);
  --radius: 16px;
  --radius-lg: 24px;
  --radius-sm: 8px;
  --shadow-primary: 0 0 24px rgba(46,124,246,0.45), 0 4px 12px rgba(0,0,0,0.3);
  --shadow-card: 0 4px 20px rgba(0,0,0,0.2);
  --shadow-hover: 0 8px 32px rgba(46,124,246,0.2);
  --font-family: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}
body {
  font-family: var(--font-family);
  background: var(--bg-base);
  color: var(--text-main);
  line-height: 1.8;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 45% 35% at 8% -2%, rgba(46,124,246,0.14), transparent 70%),
    radial-gradient(ellipse 35% 40% at 92% 102%, rgba(0,212,192,0.06), transparent 70%),
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: auto, auto, 64px 64px, 64px 64px;
  pointer-events: none;
  z-index: 0;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}
ul, ol {
  list-style: none;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding-left: 48px;
  padding-right: 48px;
  position: relative;
  z-index: 1;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  padding: 0 28px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.2px;
  transition: all 0.25s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(46,124,246,0.6), 0 8px 16px rgba(0,0,0,0.3);
}
.btn-primary:active {
  background: var(--primary-active);
  transform: translateY(0);
  box-shadow: 0 0 16px rgba(46,124,246,0.35);
}
.btn-primary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn-ghost {
  background: var(--glass-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--text-main);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: #fff;
  background: rgba(255,255,255,0.08);
  transform: translateY(-2px);
}
.btn-ghost:active {
  transform: translateY(0);
}
.btn-ghost:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn-lg {
  min-height: 56px;
  padding: 0 36px;
  font-size: 16px;
  border-radius: 14px;
}
/* ===== Navigation ===== */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  z-index: 1000;
  background: rgba(7,12,26,0.65);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.site-nav.scrolled {
  background: rgba(7,12,26,0.86);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--border-light);
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}
.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  height: 72px;
  padding: 0 48px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand-mark {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  box-shadow: 0 0 20px rgba(46,124,246,0.35);
  letter-spacing: -0.5px;
}
.brand-name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-main);
  white-space: nowrap;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.nav-links li a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  position: relative;
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-links li a:hover {
  color: var(--text-main);
  background: rgba(255,255,255,0.04);
}
.nav-links li a.active {
  color: var(--accent);
  font-weight: 600;
}
.nav-links li a.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 16px;
  right: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}
.nav-cta {
  flex-shrink: 0;
  min-height: 44px;
  padding: 0 22px;
  font-size: 14px;
}
.nav-links__cta-mobile {
  display: none;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 10px;
  border-radius: 8px;
  background: var(--glass-bg);
  border: 1px solid var(--border-light);
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text-main);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
body.nav-open .nav-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
body.nav-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}
body.nav-open .nav-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  padding: 180px 0 96px;
  overflow: hidden;
  background:
    url('/assets/images/backpic/back-1.png') center 30% / cover no-repeat,
    linear-gradient(180deg, rgba(7,12,26,0.55), var(--bg-base));
  border-bottom: 1px solid var(--border-light);
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(7,12,26,0.88) 0%, rgba(7,12,26,0.6) 55%, rgba(7,12,26,0.2) 100%);
  z-index: 1;
}
.page-hero__inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 60px;
}
.page-hero__content {
  flex: 0 0 58%;
  max-width: 680px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(0,212,192,0.12);
  border: 1px solid rgba(0,212,192,0.3);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.4px;
  margin-bottom: 24px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.hero-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}
.page-hero__content h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
  color: #fff;
  background: linear-gradient(135deg, #fff 50%, #BFD0E8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-hero__content p {
  font-size: 17px;
  line-height: 1.9;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 36px;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.page-hero__visual {
  flex: 0 0 36%;
  display: flex;
  justify-content: flex-end;
}
.hero-visual-card {
  width: 100%;
  max-width: 460px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--glass-highlight);
  background: var(--glass-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card), 0 0 60px rgba(46,124,246,0.15);
  transform: perspective(800px) rotateY(-6deg);
  transition: transform 0.4s ease;
}
.hero-visual-card:hover {
  transform: perspective(800px) rotateY(0deg);
}
.hero-visual-card img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}
.hero-visual-card__caption {
  padding: 18px 22px;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero-visual-card__caption span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  flex-shrink: 0;
}
.hero-visual-card__caption p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}
/* ===== Section Base ===== */
.section {
  padding: 100px 0;
  position: relative;
}
.section--alt {
  background: var(--bg-secondary);
}
.section--alt2 {
  background: var(--bg-tertiary);
}
.section-header {
  margin-bottom: 60px;
  max-width: 640px;
}
.section-header.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.section-tag::before {
  content: "";
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}
.section-header.center .section-tag::after {
  content: "";
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}
.section-header h2 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.3px;
  margin-bottom: 16px;
  color: var(--text-main);
}
.section-header p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}
/* ===== Theme Cards (错位交替) ===== */
.theme-cards {
  display: flex;
  flex-direction: column;
  gap: 56px;
}
.theme-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  padding: 36px;
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-card);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  position: relative;
  overflow: hidden;
}
.theme-card::after {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46,124,246,0.15), transparent 70%);
  pointer-events: none;
}
.theme-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(46,124,246,0.3);
}
.theme-card--reverse .theme-card__media {
  order: 2;
}
.theme-card--reverse .theme-card__content {
  order: 1;
}
.theme-card__media {
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}
.theme-card__media img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.theme-card:hover .theme-card__media img {
  transform: scale(1.03);
}
.theme-card__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(46,124,246,0.1), transparent 60%);
  pointer-events: none;
}
.theme-card__content {
  position: relative;
}
.theme-card__num {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent);
  display: block;
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}
.theme-card__content h3 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 16px;
  color: var(--text-main);
}
.theme-card__content p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-secondary);
  margin-bottom: 24px;
}
.theme-card__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.theme-card__list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.theme-card__list li::before {
  content: "◆";
  font-size: 8px;
  color: var(--accent);
  margin-top: 6px;
  flex-shrink: 0;
}
/* ===== Entry List ===== */
.entry-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.entry-card {
  display: flex;
  gap: 20px;
  padding: 24px;
  border-radius: var(--radius);
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-light);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  align-items: center;
}
.entry-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(46,124,246,0.3);
}
.entry-card__thumb {
  flex: 0 0 130px;
  height: 110px;
  border-radius: 12px;
  overflow: hidden;
  background: #111C33;
  position: relative;
}
.entry-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}
.entry-card:hover .entry-card__thumb img {
  transform: scale(1.05);
}
.entry-card__body {
  flex: 1;
  min-width: 0;
}
.entry-card__tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--amber);
  background: rgba(255,196,97,0.12);
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 6px;
  letter-spacing: 0.3px;
}
.entry-card__body h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-main);
  margin-bottom: 6px;
  transition: color 0.2s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.entry-card:hover .entry-card__body h3 {
  color: var(--accent);
}
.entry-card__body p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 10px;
}
.entry-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.entry-card__date {
  font-size: 13px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.entry-card__link {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color 0.2s ease, gap 0.2s ease;
}
.entry-card__link:hover {
  color: var(--accent);
  gap: 8px;
}
/* ===== FAQ ===== */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  overflow: hidden;
  transition: border-color 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}
.faq-item.open {
  border-color: rgba(0,212,192,0.4);
  background: rgba(255,255,255,0.08);
  box-shadow: 0 4px 24px rgba(0,212,192,0.08);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  text-align: left;
  min-height: 44px;
}
.faq-q__icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,212,192,0.1);
  color: var(--accent);
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.faq-q__text {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.5;
}
.faq-q__arrow {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-muted);
  transition: transform 0.3s ease, color 0.3s ease;
}
.faq-item.open .faq-q__arrow {
  transform: rotate(45deg);
  color: var(--accent);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
}
.faq-item.open .faq-a {
  max-height: 400px;
  padding: 0 24px 24px;
}
.faq-a__inner {
  display: flex;
  gap: 14px;
  padding-top: 4px;
}
.faq-a__inner::before {
  content: "A";
  flex-shrink: 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.faq-a__inner p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
}
/* ===== CTA Section ===== */
.cta-section {
  padding: 88px 0;
  position: relative;
  background:
    url('/assets/images/backpic/back-2.webp') center 50% / cover no-repeat,
    var(--bg-tertiary);
  border-top: 1px solid var(--border-light);
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(7,12,26,0.82);
  z-index: 1;
}
.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
  padding: 40px;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 0 60px rgba(46,124,246,0.1);
}
.cta-inner h2 {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 14px;
  color: #fff;
}
.cta-inner p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 30px;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}
/* ===== Footer ===== */
.site-footer {
  background: #050912;
  border-top: 1px solid var(--border-light);
  padding: 72px 0 0;
  position: relative;
  z-index: 1;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 56px;
}
.footer-brand .brand-name {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 14px;
  display: block;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 260px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 18px;
  letter-spacing: 0.4px;
}
.footer-col ul li {
  line-height: 32px;
}
.footer-col ul li a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}
.footer-col ul li a:hover {
  color: var(--accent);
}
.footer-col p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 32px;
}
.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}
/* ===== Animations ===== */
@keyframes pulse {
  0%, 100% {
    opacity: 0.6;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.06);
  }
}
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.page-hero__content {
  animation: fadeUp 0.6s ease both;
}
.page-hero__visual {
  animation: fadeUp 0.6s ease 0.15s both;
}
/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .page-hero {
    padding: 150px 0 64px;
  }
  .page-hero__inner {
    flex-direction: column;
    gap: 36px;
  }
  .page-hero__content {
    flex: 0 0 100%;
    max-width: 640px;
    text-align: center;
  }
  .page-hero__content p {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-actions {
    justify-content: center;
  }
  .page-hero__visual {
    flex: 0 0 100%;
    justify-content: center;
    max-width: 480px;
    margin: 0 auto;
    width: 100%;
  }
  .hero-visual-card {
    transform: none;
  }
  .theme-card {
    gap: 32px;
    padding: 28px;
  }
  .theme-card__media img {
    height: 220px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}
@media (max-width: 767px) {
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }
  .nav-inner {
    padding: 0 20px;
    height: 60px;
  }
  .site-nav {
    height: 60px;
  }
  .brand-name {
    font-size: 16px;
  }
  .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 16px;
  }
  .nav-links {
    position: fixed;
    top: 60px;
    right: 0;
    bottom: 0;
    width: 280px;
    background: rgba(7,12,26,0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 32px 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    margin-left: 0;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 999;
    border-left: 1px solid var(--border-light);
    overflow-y: auto;
  }
  body.nav-open .nav-links {
    transform: translateX(0);
  }
  .nav-links li {
    width: 100%;
  }
  .nav-links li a {
    padding: 12px 14px;
    font-size: 17px;
    border-radius: 8px;
  }
  .nav-links li a.active::after {
    left: 14px;
    right: auto;
    width: 18px;
    height: 2px;
  }
  .nav-links__cta-mobile {
    display: block;
    width: 100%;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border-light);
  }
  .nav-links__cta-mobile .btn {
    width: 100%;
  }
  .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: flex;
    margin-left: auto;
  }
  .section {
    padding: 60px 0;
  }
  .section-header {
    margin-bottom: 36px;
  }
  .section-header h2 {
    font-size: 28px;
  }
  .page-hero {
    padding: 120px 0 48px;
  }
  .page-hero__content h1 {
    font-size: 32px;
    line-height: 1.3;
  }
  .page-hero__content p {
    font-size: 15px;
    line-height: 1.75;
  }
  .hero-actions {
    gap: 12px;
  }
  .hero-actions .btn {
    flex: 1;
    min-height: 48px;
    font-size: 14px;
    padding: 0 16px;
  }
  .hero-visual-card img {
    height: 200px;
  }
  .theme-cards {
    gap: 24px;
  }
  .theme-card {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 20px;
  }
  .theme-card--reverse .theme-card__media {
    order: 1;
  }
  .theme-card--reverse .theme-card__content {
    order: 2;
  }
  .theme-card__media img {
    height: 190px;
  }
  .theme-card__content h3 {
    font-size: 24px;
  }
  .theme-card__list li {
    font-size: 13px;
  }
  .entry-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .entry-card {
    flex-direction: column;
    align-items: stretch;
    padding: 18px;
    gap: 14px;
  }
  .entry-card__thumb {
    flex: 0 0 auto;
    height: 150px;
  }
  .entry-card__body h3 {
    font-size: 16px;
  }
  .entry-card__body p {
    font-size: 13px;
  }
  .entry-card__meta {
    flex-wrap: wrap;
  }
  .faq-q {
    padding: 16px 18px;
    gap: 12px;
  }
  .faq-q__text {
    font-size: 15px;
  }
  .faq-q__icon {
    width: 28px;
    height: 28px;
    font-size: 13px;
  }
  .faq-a {
    padding: 0 18px;
  }
  .faq-item.open .faq-a {
    padding: 0 18px 18px;
  }
  .faq-a__inner p {
    font-size: 14px;
  }
  .cta-section {
    padding: 56px 0;
  }
  .cta-inner {
    padding: 28px 20px;
  }
  .cta-inner h2 {
    font-size: 26px;
  }
  .cta-inner p {
    font-size: 15px;
  }
  .cta-actions .btn {
    flex: 1;
    min-height: 48px;
    font-size: 14px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 40px;
  }
  .footer-col h4 {
    margin-bottom: 12px;
  }
  .site-footer {
    padding-top: 48px;
  }
}
@media (max-width: 520px) {
  .brand-name {
    letter-spacing: 0;
  }
  .page-hero__content h1 {
    font-size: 28px;
  }
  .theme-card__content h3 {
    font-size: 22px;
  }
  .section-header h2 {
    font-size: 24px;
  }
}
@media (min-width: 1440px) {
  .container {
    max-width: 1320px;
  }
}