/* roulang page: index */
/* ===== Design Tokens ===== */
:root{
  --primary:#2e7cf6;
  --primary-dark:#1e5be0;
  --secondary:#00c3d9;
  --bg-primary:#0a0e1a;
  --bg-secondary:#0e1524;
  --bg-deeper:#070a14;
  --panel:rgba(255,255,255,0.04);
  --glass-border:rgba(255,255,255,0.08);
  --text-title:#edf2ff;
  --text-body:#a4b1cd;
  --text-weak:#6f7f9c;
  --border:rgba(255,255,255,0.08);
  --success:#20c997;
  --radius-lg:16px;
  --radius-md:10px;
  --radius-sm:8px;
  --shadow-card:0 8px 28px rgba(0,0,0,0.25);
  --shadow-hover:0 12px 36px rgba(0,0,0,0.4);
  --shadow-btn:0 4px 20px rgba(46,124,246,0.35);
  --font-family:"PingFang SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
}
/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-family);
  background:var(--bg-primary);
  color:var(--text-body);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .25s ease}
ul,ol{list-style:none}
button,input,textarea{font-family:inherit;font-size:inherit;color:inherit;border:none;outline:none;background:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.grid-container{padding-left:24px;padding-right:24px;max-width:1248px}
/* ===== Header / Nav ===== */
.site-header{
  position:fixed;top:0;left:0;width:100%;
  z-index:1000;
  background:transparent;
  transition:background .35s ease,box-shadow .35s ease,border-color .35s ease;
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(8,12,24,0.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(46,124,246,0.2);
  box-shadow:0 4px 30px rgba(0,0,0,0.3);
}
.nav-wrap{
  display:flex;align-items:center;
  justify-content:space-between;
  height:72px;
  position:relative;
}
.nav-logo{
  display:flex;align-items:center;gap:12px;
  font-size:20px;font-weight:700;color:var(--text-title);
  letter-spacing:.5px;
}
.logo-mark{
  width:30px;height:30px;border-radius:9px;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  display:block;position:relative;
  flex-shrink:0;
  box-shadow:0 0 16px rgba(46,124,246,0.4);
}
.logo-mark::after{
  content:'';position:absolute;inset:5px;
  border:2px solid rgba(255,255,255,0.55);
  border-radius:5px;
}
.nav-links{
  display:flex;align-items:center;gap:34px;
  margin-left:auto;margin-right:34px;
}
.nav-links a{
  font-size:15px;color:var(--text-body);
  position:relative;padding:6px 2px;
  font-weight:500;
  transition:color .25s ease;
}
.nav-links a:hover{color:var(--text-title)}
.nav-links a.active{
  color:var(--text-title);
}
.nav-links a.active::after{
  content:'';position:absolute;left:0;bottom:-2px;
  width:100%;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  border-radius:2px;
  box-shadow:0 0 10px rgba(46,124,246,0.5);
}
.nav-cta{display:flex;align-items:center;gap:12px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:0 26px;
  border-radius:var(--radius-md);
  font-size:15px;font-weight:600;
  cursor:pointer;transition:all .25s ease;
  line-height:1;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  color:#fff;
  box-shadow:var(--shadow-btn);
  border:1px solid rgba(255,255,255,0.1);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 6px 28px rgba(46,124,246,0.55);
  color:#fff;
}
.btn-primary:active{
  transform:translateY(0);
  filter:brightness(.92);
}
.btn-ghost{
  background:transparent;
  color:var(--text-title);
  border:1px solid rgba(255,255,255,0.2);
  backdrop-filter:blur(4px);
}
.btn-ghost:hover{
  border-color:var(--primary);
  background:rgba(46,124,246,0.08);
  color:#fff;
}
.btn-sm{min-height:40px;padding:0 20px;font-size:14px}
.nav-toggle{
  display:none;
  width:44px;height:44px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,0.06);
  border:1px solid var(--border);
  align-items:center;justify-content:center;
  cursor:pointer;flex-direction:column;gap:5px;
}
.nav-toggle span{
  display:block;width:20px;height:2px;
  background:var(--text-title);
  border-radius:2px;
  transition:all .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)}
/* ===== Hero ===== */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;align-items:center;
  padding:140px 0 80px;
  background:
    linear-gradient(rgba(8,12,24,0.78),rgba(10,14,26,0.94)),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  overflow:hidden;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,0.03) 1px,transparent 1px);
  background-size:60px 60px;
  pointer-events:none;
}
.hero::after{
  content:'';position:absolute;
  width:420px;height:420px;
  right:-120px;top:20%;
  background:radial-gradient(circle,rgba(46,124,246,0.18),transparent 70%);
  border-radius:50%;
  pointer-events:none;
}
.hero-content{
  position:relative;z-index:2;
  max-width:780px;
}
.hero h1{
  font-size:clamp(34px,4.5vw,54px);
  font-weight:700;line-height:1.22;
  color:var(--text-title);
  margin-bottom:22px;
  letter-spacing:-.5px;
}
.h1-brand{
  color:#fff;
  text-shadow:0 0 40px rgba(46,124,246,0.45);
}
.h1-sub{
  color:var(--secondary);
  font-weight:600;
}
.hero-sub{
  font-size:17px;line-height:1.8;
  color:var(--text-body);
  max-width:600px;
  margin-bottom:36px;
}
.hero-actions{
  display:flex;gap:16px;flex-wrap:wrap;
  margin-bottom:48px;
}
.hero-trust{
  display:flex;align-items:center;gap:14px;
  flex-wrap:wrap;
  font-size:13px;color:var(--text-weak);
}
.hero-trust .dot{
  width:4px;height:4px;border-radius:50%;
  background:var(--secondary);
  opacity:.6;
}
/* ===== Section ===== */
.section{
  padding:88px 0;
  position:relative;
}
.section:nth-child(even){background:var(--bg-secondary)}
.section-head{
  margin-bottom:48px;
  max-width:640px;
}
.section-tag{
  display:inline-block;
  font-size:13px;font-weight:600;
  color:var(--secondary);
  background:rgba(0,195,217,0.1);
  border:1px solid rgba(0,195,217,0.2);
  padding:4px 14px;
  border-radius:20px;
  margin-bottom:14px;
  letter-spacing:.5px;
}
.section-head h2{
  font-size:clamp(26px,3vw,34px);
  font-weight:700;color:var(--text-title);
  line-height:1.3;
  margin-bottom:12px;
}
.section-head p{
  font-size:15px;color:var(--text-body);
  line-height:1.7;
}
/* ===== Service Cards ===== */
.service-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.service-card{
  position:relative;
  background:linear-gradient(135deg,rgba(255,255,255,0.07),rgba(255,255,255,0.02));
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
  padding:32px 30px;
  overflow:hidden;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(12px) saturate(120%);
}
.service-card::before{
  content:'';position:absolute;top:0;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,var(--primary),transparent);
  opacity:0;
  transition:opacity .3s ease;
}
.service-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(46,124,246,0.4);
}
.service-card:hover::before{opacity:1}
.service-num{
  position:absolute;top:20px;right:24px;
  font-size:48px;font-weight:800;
  color:rgba(255,255,255,0.05);
  line-height:1;
  font-variant-numeric:tabular-nums;
}
.service-card i{
  font-size:28px;
  color:var(--secondary);
  margin-bottom:18px;
  display:block;
  background:rgba(0,195,217,0.08);
  width:56px;height:56px;
  border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(0,195,217,0.15);
}
.service-card h3{
  font-size:19px;font-weight:600;
  color:var(--text-title);
  margin-bottom:10px;
}
.service-card p{
  font-size:14px;color:var(--text-body);
  line-height:1.7;
  margin-bottom:18px;
}
.service-link{
  font-size:14px;font-weight:600;
  color:var(--primary);
  display:inline-flex;align-items:center;gap:6px;
}
.service-link:hover{color:var(--secondary)}
.service-link i{font-size:12px;background:none;width:auto;height:auto;border:none;margin:0}
/* ===== Stats ===== */
.stats-section{
  background:
    linear-gradient(rgba(14,21,36,0.95),rgba(10,14,26,0.98)),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  padding:72px 0;
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
  position:relative;
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
}
.stat-item{
  text-align:center;
  padding:16px 24px;
  position:relative;
}
.stat-item:not(:last-child)::after{
  content:'';position:absolute;
  right:0;top:20%;bottom:20%;
  width:1px;
  background:linear-gradient(180deg,transparent,rgba(255,255,255,0.12),transparent);
}
.stat-num{
  font-size:42px;font-weight:800;
  font-variant-numeric:tabular-nums;
  line-height:1.2;
  color:var(--text-title);
  text-shadow:0 0 30px rgba(46,124,246,0.4);
}
.stat-num em{
  font-style:normal;
  color:var(--secondary);
  font-size:28px;
  font-weight:700;
  margin-left:2px;
}
.stat-label{
  font-size:14px;color:var(--text-body);
  margin-top:8px;
  letter-spacing:1px;
}
/* ===== Case Cards ===== */
.case-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:28px;
}
.case-card{
  background:linear-gradient(135deg,rgba(255,255,255,0.06),rgba(255,255,255,0.02));
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  transition:transform .3s ease,box-shadow .3s ease;
  box-shadow:var(--shadow-card);
  display:flex;
  flex-direction:column;
}
.case-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
}
.case-cover{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
}
.case-cover img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .45s ease;
}
.case-card:hover .case-cover img{transform:scale(1.04)}
.case-cover::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 40%,rgba(10,14,26,0.5) 100%);
}
.case-tag{
  position:absolute;top:16px;left:16px;
  z-index:2;
  background:rgba(10,14,26,0.75);
  backdrop-filter:blur(6px);
  color:var(--secondary);
  font-size:12px;
  font-weight:600;
  padding:5px 14px;
  border-radius:20px;
  border:1px solid rgba(0,195,217,0.3);
}
.case-body{
  padding:26px 28px 28px;
  flex:1;
  display:flex;
  flex-direction:column;
}
.case-body h3{
  font-size:20px;font-weight:600;
  color:var(--text-title);
  margin-bottom:10px;
}
.case-body p{
  font-size:14px;color:var(--text-body);
  line-height:1.7;
  flex:1;
}
.case-body .case-link{
  margin-top:18px;
  font-size:14px;font-weight:600;
  color:var(--primary);
  display:inline-flex;align-items:center;gap:6px;
}
.case-body .case-link:hover{color:var(--secondary)}
.case-body .case-link i{font-size:12px}
/* ===== Solution ===== */
.solution-section{
  background:var(--bg-primary);
}
.solution-wrap{
  display:grid;
  grid-template-columns:1.05fr 0.95fr;
  gap:56px;
  align-items:center;
}
.solution-text h2{
  font-size:clamp(26px,3vw,34px);
  font-weight:700;color:var(--text-title);
  line-height:1.3;
  margin-bottom:14px;
}
.solution-text > p{
  font-size:15px;color:var(--text-body);
  line-height:1.8;
  margin-bottom:26px;
}
.solution-list{
  margin-bottom:32px;
}
.solution-list li{
  font-size:15px;color:var(--text-body);
  padding:7px 0;
  padding-left:26px;
  position:relative;
  line-height:1.7;
}
.solution-list li::before{
  content:'';position:absolute;left:0;top:15px;
  width:8px;height:8px;border-radius:50%;
  background:var(--secondary);
  box-shadow:0 0 10px rgba(0,195,217,0.4);
}
.solution-visual{
  position:relative;
}
.solution-visual img{
  width:100%;
  border-radius:var(--radius-lg);
  border:1px solid var(--glass-border);
  box-shadow:var(--shadow-hover);
  aspect-ratio:4/3;
  object-fit:cover;
}
.solution-float{
  position:absolute;
  bottom:-22px;left:-22px;
  background:rgba(13,20,36,0.92);
  backdrop-filter:blur(14px);
  border:1px solid var(--glass-border);
  border-radius:14px;
  padding:18px 24px;
  box-shadow:0 12px 36px rgba(0,0,0,0.45);
  display:flex;align-items:center;gap:14px;
}
.solution-float i{
  font-size:24px;color:var(--secondary);
}
.solution-float strong{
  display:block;
  font-size:20px;font-weight:700;
  color:var(--text-title);
  line-height:1.2;
  font-variant-numeric:tabular-nums;
}
.solution-float span{
  font-size:12px;color:var(--text-weak);
}
/* ===== News List ===== */
.news-section{
  background:var(--bg-secondary);
}
.news-list{
  display:flex;flex-direction:column;
}
.news-row{
  display:flex;align-items:center;
  padding:20px 16px;
  border-bottom:1px solid rgba(255,255,255,0.06);
  transition:background .25s ease,transform .25s ease,box-shadow .25s ease;
  border-radius:10px;
  gap:22px;
}
.news-row:hover{
  background:rgba(46,124,246,0.06);
  transform:translateX(4px);
  box-shadow:0 4px 20px rgba(0,0,0,0.2);
}
.news-date{
  flex-shrink:0;
  width:72px;height:56px;
  background:rgba(46,124,246,0.1);
  border:1px solid rgba(46,124,246,0.25);
  border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;
  color:var(--primary);
  font-variant-numeric:tabular-nums;
  letter-spacing:.5px;
  text-align:center;
  line-height:1.3;
}
.news-body{
  flex:1;
  min-width:0;
  display:flex;flex-direction:column;
  gap:3px;
}
.news-meta{
  display:flex;align-items:center;gap:10px;
  flex-wrap:wrap;
}
.news-cat{
  font-size:12px;font-weight:600;
  color:var(--secondary);
  background:rgba(0,195,217,0.08);
  border:1px solid rgba(0,195,217,0.18);
  padding:2px 10px;
  border-radius:14px;
  letter-spacing:.3px;
  flex-shrink:0;
}
.news-title{
  font-size:16px;font-weight:600;
  color:var(--text-title);
  transition:color .2s ease;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.news-row:hover .news-title{color:var(--secondary)}
.news-summary{
  font-size:13px;color:var(--text-weak);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  max-width:100%;
}
.news-arrow{
  flex-shrink:0;
  width:36px;height:36px;
  border-radius:50%;
  background:rgba(255,255,255,0.04);
  border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-weak);
  opacity:0;
  transition:all .25s ease;
}
.news-row:hover .news-arrow{
  opacity:1;color:var(--primary);
  border-color:var(--primary);
}
.news-empty{
  text-align:center;
  padding:64px 24px;
  color:var(--text-weak);
}
.news-empty i{
  font-size:40px;
  color:var(--text-weak);
  opacity:.4;
  display:block;
  margin-bottom:14px;
}
.news-empty p{font-size:14px}
/* ===== FAQ ===== */
.faq-panel{
  background:rgba(255,255,255,0.03);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
  overflow:hidden;
}
.faq-item{
  border-bottom:1px solid var(--border);
  transition:border-color .3s ease;
}
.faq-item:last-child{border-bottom:none}
.faq-item.active{
  border-color:rgba(46,124,246,0.4);
  background:rgba(46,124,246,0.03);
}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 28px;
  min-height:64px;
  cursor:pointer;
  font-size:16px;font-weight:600;
  color:var(--text-title);
  text-align:left;
  transition:color .25s ease;
  background:transparent;
}
.faq-q:hover{color:var(--secondary)}
.faq-icon{
  flex-shrink:0;
  width:32px;height:32px;
  border-radius:50%;
  border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  position:relative;
  transition:transform .25s ease,border-color .25s ease;
}
.faq-icon::before,.faq-icon::after{
  content:'';position:absolute;
  background:var(--text-body);
  transition:background .25s ease;
}
.faq-icon::before{width:12px;height:2px}
.faq-icon::after{width:2px;height:12px}
.faq-item.active .faq-icon{
  transform:rotate(45deg);
  border-color:var(--primary);
}
.faq-item.active .faq-icon::before,.faq-item.active .faq-icon::after{
  background:var(--primary);
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .35s ease;
}
.faq-a p{
  padding:0 28px 20px;
  font-size:14px;
  color:var(--text-body);
  line-height:1.8;
}
/* ===== Contact ===== */
.contact-section{
  background:var(--bg-primary);
  padding:88px 0;
}
.contact-wrap{
  display:grid;
  grid-template-columns:0.9fr 1.1fr;
  gap:48px;
  align-items:stretch;
}
.contact-info{
  background:linear-gradient(135deg,rgba(46,124,246,0.1),rgba(0,195,217,0.03));
  border:1px solid rgba(46,124,246,0.2);
  border-radius:20px;
  padding:40px;
  display:flex;flex-direction:column;
}
.contact-info h2{
  font-size:28px;font-weight:700;
  color:var(--text-title);
  margin-bottom:12px;
}
.contact-info > p{
  font-size:14px;color:var(--text-body);
  margin-bottom:28px;
  line-height:1.7;
}
.contact-list{
  margin-top:auto;
}
.contact-list li{
  display:flex;align-items:flex-start;gap:14px;
  padding:12px 0;
  font-size:15px;color:var(--text-body);
  border-bottom:1px dashed rgba(255,255,255,0.06);
}
.contact-list li:last-child{border-bottom:none}
.contact-list i{
  color:var(--secondary);
  font-size:18px;
  margin-top:3px;
  width:20px;text-align:center;
}
.contact-list strong{
  color:var(--text-title);
  font-weight:600;
  margin-right:6px;
}
.contact-form{
  background:linear-gradient(135deg,rgba(255,255,255,0.07),rgba(255,255,255,0.02));
  border:1px solid var(--glass-border);
  border-radius:20px;
  padding:40px;
  backdrop-filter:blur(12px);
}
.contact-form h3{
  font-size:22px;font-weight:600;
  color:var(--text-title);
  margin-bottom:24px;
}
.form-group{
  margin-bottom:18px;
}
.form-group label{
  display:block;
  font-size:13px;font-weight:600;
  color:var(--text-body);
  margin-bottom:6px;
  letter-spacing:.3px;
}
.form-group input,.form-group textarea{
  width:100%;
  background:rgba(255,255,255,0.05);
  border:1px solid rgba(255,255,255,0.12);
  border-radius:var(--radius-md);
  padding:12px 16px;
  font-size:15px;
  color:var(--text-title);
  transition:border-color .25s ease,box-shadow .25s ease;
  min-height:46px;
}
.form-group textarea{
  min-height:110px;
  resize:vertical;
}
.form-group input::placeholder,.form-group textarea::placeholder{
  color:#64748b;
}
.form-group input:focus,.form-group textarea:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(46,124,246,0.15);
}
.form-group input:focus-visible,.form-group textarea:focus-visible{
  outline:none;
}
.form-submit{
  width:100%;
  margin-top:8px;
}
/* ===== Footer ===== */
.footer{
  background:var(--bg-deeper);
  border-top:1px solid rgba(46,124,246,0.15);
  padding:64px 0 0;
  position:relative;
}
.footer::before{
  content:'';position:absolute;top:-1px;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--primary),var(--secondary),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.3fr 0.8fr 0.8fr 1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .nav-logo{
  font-size:18px;
  margin-bottom:14px;
}
.footer-brand p{
  font-size:13px;color:var(--text-weak);
  line-height:1.7;
  margin-top:12px;
}
.footer h4{
  font-size:15px;font-weight:600;
  color:var(--text-title);
  margin-bottom:16px;
  letter-spacing:.5px;
}
.footer-links li{
  margin-bottom:10px;
}
.footer-links a{
  font-size:14px;color:var(--text-weak);
  transition:color .25s ease;
}
.footer-links a:hover{
  color:var(--primary);
}
.footer-contact li{
  display:flex;align-items:center;gap:10px;
  font-size:14px;color:var(--text-weak);
  margin-bottom:12px;
}
.footer-contact i{
  color:var(--secondary);
  width:16px;text-align:center;
}
.footer-copy{
  border-top:1px solid rgba(255,255,255,0.06);
  padding:20px 0;
  text-align:center;
  font-size:13px;
  color:var(--text-weak);
}
.footer-copy a{
  color:var(--text-weak);
}
.footer-copy a:hover{color:var(--primary)}
/* ===== Mobile Drawer ===== */
.mobile-drawer{
  display:none;
}
/* ===== Responsive ===== */
@media(max-width:1024px){
  .nav-links{
    gap:20px;
    margin-right:20px;
  }
  .nav-links a{font-size:14px}
  .solution-wrap{
    gap:36px;
  }
  .contact-wrap{
    gap:32px;
  }
}
@media(max-width:768px){
  .container{padding:0 20px}
  .section{padding:64px 0}
  .nav-links{
    position:fixed;
    top:72px;left:0;right:0;
    background:var(--bg-deeper);
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    padding:16px 24px 24px;
    border-bottom:1px solid rgba(46,124,246,0.15);
    display:none;
    z-index:999;
  }
  .nav-links.open{
    display:flex;
  }
  .nav-links a{
    width:100%;
    padding:14px 0;
    font-size:16px;
    border-bottom:1px solid rgba(255,255,255,0.05);
  }
  .nav-links a:last-child{border-bottom:none}
  .nav-links a.active::after{
    left:0;bottom:auto;top:50%;
    transform:translateY(-50%);
    width:3px;height:20px;
    border-radius:3px;
  }
  .nav-toggle{
    display:flex;
  }
  .nav-cta .btn-primary{display:none}
  .hero{
    min-height:auto;
    padding:140px 0 60px;
  }
  .hero h1{font-size:32px}
  .hero-sub{font-size:15px}
  .service-grid{
    grid-template-columns:1fr;
    gap:18px;
  }
  .stats-grid{
    grid-template-columns:1fr 1fr;
    gap:28px 0;
  }
  .stat-item:nth-child(2)::after{display:none}
  .case-grid{
    grid-template-columns:1fr;
    gap:20px;
  }
  .solution-wrap{
    grid-template-columns:1fr;
    gap:40px;
  }
  .solution-float{
    left:12px;bottom:-22px;
  }
  .news-row{
    flex-wrap:wrap;
    gap:12px;
  }
  .news-date{
    width:60px;height:50px;
    font-size:13px;
  }
  .news-arrow{
    display:none;
  }
  .news-title{
    white-space:normal;
    font-size:15px;
  }
  .news-summary{
    white-space:normal;
    font-size:13px;
  }
  .contact-wrap{
    grid-template-columns:1fr;
    gap:28px;
  }
  .contact-info,.contact-form{
    padding:28px;
  }
  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:32px;
  }
}
@media(max-width:520px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
  .hero{padding:130px 0 48px}
  .hero h1{font-size:28px}
  .hero-actions .btn{
    width:100%;
  }
  .hero-trust{
    gap:8px;
    font-size:12px;
  }
  .stat-num{
    font-size:32px;
  }
  .stat-num em{font-size:22px}
  .footer-grid{
    grid-template-columns:1fr;
    gap:28px;
  }
  .footer-copy{
    font-size:12px;
  }
  .contact-info,.contact-form{
    padding:22px;
  }
  .news-row{
    padding:16px 12px;
  }
}

/* roulang page: category1 */
:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #0e1524;
  --panel: rgba(255,255,255,0.04);
  --primary: #2e7cf6;
  --primary-dark: #1e5be0;
  --secondary: #00c3d9;
  --title: #edf2ff;
  --text: #a4b1cd;
  --muted: #6f7f9c;
  --border: rgba(255,255,255,0.08);
  --success: #20c997;
  --glow: rgba(46,124,246,0.45);
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --shadow-card: 0 8px 28px rgba(0,0,0,0.25);
  --shadow-hover: 0 12px 36px rgba(0,0,0,0.4);
  --header-height: 72px;
  --space-section: 88px;
  --space-section-mobile: 56px;
}
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-primary);
  color: var(--text);
  font-family: "PingFang SC", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--text); text-decoration: none; transition: color .2s; }
a:hover { color: var(--title); }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; font-size: 15px; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: var(--space-section) 0; }
.section-alt { background: var(--bg-secondary); }
.section-header { text-align: center; margin-bottom: 52px; }
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--secondary);
  background: rgba(0,195,217,0.1);
  border: 1px solid rgba(0,195,217,0.2);
  padding: 4px 18px;
  border-radius: 30px;
  letter-spacing: 1px;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 700;
  color: var(--title);
  line-height: 1.3;
}
.section-sub { max-width: 700px; margin: 14px auto 0; color: var(--muted); font-size: 15px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  border: none;
  transition: all .25s ease;
  outline: none;
  cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 20px rgba(46,124,246,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(46,124,246,0.55);
  color: #fff;
}
.btn-primary:active { transform: translateY(1px); opacity: .9; }
.btn-primary:focus-visible { outline: 3px solid rgba(46,124,246,0.4); outline-offset: 2px; }
.btn-outline {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.2);
}
.btn-outline:hover {
  border-color: var(--primary);
  background: rgba(46,124,246,0.08);
  color: #fff;
}
.btn-outline:active { transform: translateY(1px); }
.btn-sm { min-height: 40px; padding: 0 20px; font-size: 14px; }

/* Header */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: transparent;
  transition: background .35s ease, box-shadow .35s ease, border-color .35s ease;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(8,12,24,0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(46,124,246,0.25);
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--title);
  white-space: nowrap;
}
.logo-mark {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 0 14px rgba(46,124,246,0.5);
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav-links a {
  position: relative;
  font-size: 15px;
  color: var(--text);
  padding: 8px 0;
  letter-spacing: 0.3px;
  transition: color .25s;
}
.nav-links a:hover { color: var(--title); }
.nav-links a.active { color: var(--title); font-weight: 600; }
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  box-shadow: 0 0 10px rgba(46,124,246,0.5);
}
.nav-cta { display: flex; align-items: center; gap: 16px; }
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--title);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero */
.page-hero {
  position: relative;
  padding: 160px 0 80px;
  background: linear-gradient(180deg, rgba(8,12,24,0.82) 0%, rgba(10,14,26,0.94) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom: 1px solid var(--border);
}
.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(0,195,217,0.08) 0%, transparent 60%);
  pointer-events: none;
}
.breadcrumb {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 26px;
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb i { font-size: 12px; color: var(--muted); }
.page-hero h1 {
  position: relative;
  z-index: 2;
  font-size: clamp(32px, 4.5vw, 50px);
  font-weight: 700;
  color: var(--title);
  line-height: 1.25;
  letter-spacing: 1px;
  margin-bottom: 18px;
}
.page-hero .hero-desc {
  position: relative;
  z-index: 2;
  max-width: 720px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text);
}
.page-hero .hero-desc strong { color: var(--secondary); font-weight: 600; }
.hero-metrics {
  position: relative;
  z-index: 2;
  display: flex;
  gap: 28px;
  margin-top: 34px;
  flex-wrap: wrap;
}
.hero-metrics .metric {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
}
.hero-metrics .metric i { color: var(--secondary); }

/* Service Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.glass-card {
  background: linear-gradient(135deg, rgba(255,255,255,0.07), rgba(255,255,255,0.02));
  backdrop-filter: blur(12px) saturate(120%);
  -webkit-backdrop-filter: blur(12px) saturate(120%);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 28px;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.glass-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}
.service-card { position: relative; overflow: hidden; }
.service-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 120px; height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46,124,246,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.service-num {
  font-size: 14px;
  font-weight: 700;
  color: var(--secondary);
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.service-icon {
  width: 46px; height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(46,124,246,0.12);
  color: var(--primary);
  font-size: 20px;
  margin-bottom: 18px;
}
.service-card h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--title);
  margin-bottom: 10px;
}
.service-card p { font-size: 15px; line-height: 1.75; color: var(--text); margin-bottom: 0; }

/* Scenario */
.scenario-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: center;
}
.scenario-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.scenario-media img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
}
.scenario-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,14,26,0.15) 0%, transparent 60%);
}
.scenario-float {
  position: absolute;
  right: 20px; bottom: 20px;
  z-index: 2;
  background: rgba(13,20,36,0.92);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px 22px;
  box-shadow: var(--shadow-hover);
  color: var(--title);
  font-size: 14px;
}
.scenario-float strong {
  display: block;
  font-size: 22px;
  color: var(--secondary);
  font-variant-numeric: tabular-nums;
  margin-bottom: 2px;
}
.scenario-content h2 { font-size: 26px; font-weight: 700; color: var(--title); margin-bottom: 16px; line-height: 1.4; }
.scenario-content > p { color: var(--muted); margin-bottom: 24px; font-size: 15px; }
.scenario-list { list-style: none; }
.scenario-list li {
  position: relative;
  padding: 10px 0 10px 34px;
  font-size: 15px;
  color: var(--text);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.scenario-list li:last-child { border-bottom: none; }
.scenario-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 19px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px rgba(46,124,246,0.5);
}
.scenario-list li:nth-child(even)::before { background: var(--secondary); box-shadow: 0 0 8px rgba(0,195,217,0.5); }

/* Process */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.step-item {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  text-align: center;
  transition: transform .25s, border-color .25s, box-shadow .25s;
}
.step-item:hover {
  transform: translateY(-5px);
  border-color: rgba(46,124,246,0.4);
  box-shadow: 0 12px 36px rgba(0,0,0,0.35);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(46,124,246,0.2), rgba(0,195,217,0.15));
  border: 1px solid rgba(46,124,246,0.35);
  color: var(--secondary);
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}
.step-item h3 { font-size: 17px; font-weight: 600; color: var(--title); margin-bottom: 8px; }
.step-item p { font-size: 14px; color: var(--muted); margin-bottom: 0; }

/* FAQ */
.faq-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 24px;
}
.faq-item {
  border: 1px solid transparent;
  border-radius: 12px;
  margin-bottom: 12px;
  background: rgba(255,255,255,0.025);
  transition: border-color .3s, background .3s;
}
.faq-item:last-child { margin-bottom: 0; }
.faq-item.active {
  border-color: rgba(46,124,246,0.4);
  background: rgba(46,124,246,0.04);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 54px;
  padding: 0 20px;
  background: transparent;
  border: none;
  text-align: left;
  font-size: 16px;
  font-weight: 500;
  color: var(--title);
  gap: 16px;
  border-radius: 12px;
  transition: color .25s;
}
.faq-question:hover { color: var(--secondary); }
.faq-icon {
  flex-shrink: 0;
  position: relative;
  width: 18px; height: 18px;
}
.faq-icon::before, .faq-icon::after {
  content: '';
  position: absolute;
  background: var(--secondary);
  border-radius: 2px;
  transition: transform .3s;
}
.faq-icon::before { left: 4px; right: 4px; top: 8px; height: 2px; }
.faq-icon::after { top: 4px; bottom: 4px; left: 8px; width: 2px; }
.faq-item.active .faq-icon::after { transform: scaleY(0); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .3s ease;
  padding: 0 20px;
}
.faq-item.active .faq-answer {
  max-height: 200px;
  padding: 4px 20px 18px;
}
.faq-answer p {
  font-size: 14px;
  color: var(--text);
  line-height: 1.8;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 14px;
  margin-bottom: 0;
}

/* CTA */
.cta-box {
  position: relative;
  text-align: center;
  background: linear-gradient(135deg, rgba(46,124,246,0.12), rgba(0,195,217,0.06));
  border: 1px solid rgba(46,124,246,0.3);
  border-radius: 24px;
  padding: 60px 40px;
  box-shadow: var(--shadow-card);
}
.cta-box h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  color: var(--title);
  margin-bottom: 14px;
}
.cta-box p {
  color: var(--muted);
  font-size: 16px;
  max-width: 560px;
  margin: 0 auto 30px;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Footer */
.footer {
  background: #070a14;
  border-top: 1px solid rgba(46,124,246,0.3);
  padding-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .nav-logo { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: var(--muted); line-height: 1.7; max-width: 300px; }
.footer h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--title);
  margin-bottom: 16px;
}
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  font-size: 14px;
  color: var(--muted);
}
.footer-links a:hover { color: var(--primary); }
.footer-contact { list-style: none; }
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 10px;
}
.footer-contact i { color: var(--secondary); width: 16px; }
.footer-copy {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 22px 0;
  text-align: center;
  font-size: 13px;
  color: #55617a;
}

/* Responsive */
@media (max-width: 1024px) {
  .scenario-grid { grid-template-columns: 1fr; gap: 30px; }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  :root { --space-section: 56px; }
  .container { padding: 0 16px; }
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0; right: 0;
    background: #0b111f;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 20px 24px 30px;
    transform: translateY(-120%);
    transition: transform .35s ease;
    z-index: 999;
    border-bottom: 1px solid rgba(46,124,246,0.2);
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a {
    display: block;
    width: 100%;
    padding: 14px 0;
    font-size: 16px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .nav-links a.active::after { display: none; }
  .nav-links a.active { color: var(--secondary); }
  .nav-toggle { display: flex; }
  .nav-cta .btn-primary { display: none; }
  .page-hero { padding: 130px 0 56px; }
  .page-hero h1 { font-size: 32px; }
  .hero-metrics { gap: 14px; flex-direction: column; }
  .card-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .faq-panel { padding: 14px; }
  .cta-box { padding: 40px 24px; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .scenario-float { left: 16px; right: 16px; bottom: 16px; text-align: center; }
}

/* roulang page: article */
:root {
      --bg: #0a0e1a;
      --bg-alt: #0e1524;
      --panel: rgba(255,255,255,0.04);
      --primary: #2e7cf6;
      --accent: #00c3d9;
      --title: #edf2ff;
      --text: #a4b1cd;
      --muted: #6f7f9c;
      --border: rgba(255,255,255,0.08);
      --success: #20c997;
      --card-highlight: rgba(46,124,246,0.6);
      --btn-glow: rgba(46,124,246,0.45);
      --radius-lg: 16px;
      --radius-md: 10px;
      --radius-sm: 8px;
      --shadow-card: 0 8px 28px rgba(0,0,0,0.25);
      --shadow-hover: 0 12px 36px rgba(0,0,0,0.4);
      --font: "PingFang SC", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    }

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

    html { scroll-behavior: smooth; }

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

    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; }
    ul, ol { list-style: none; }
    button { font-family: inherit; cursor: pointer; }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

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

    /* ========== Header ========== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      background: transparent;
      border-bottom: 1px solid transparent;
      transition: background 0.3s, box-shadow 0.3s, border-color 0.3s;
    }

    .site-header.scrolled {
      background: rgba(8, 12, 24, 0.72);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom-color: rgba(46, 124, 246, 0.25);
      box-shadow: 0 4px 30px rgba(0,0,0,0.3);
    }

    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }

    .nav-logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--title);
      letter-spacing: 0.5px;
    }

    .logo-mark {
      width: 22px;
      height: 22px;
      border-radius: 6px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      display: block;
      position: relative;
      box-shadow: 0 0 14px rgba(46, 124, 246, 0.5);
      flex-shrink: 0;
    }

    .logo-mark::after {
      content: '';
      position: absolute;
      inset: 4px;
      border-radius: 3px;
      background: var(--bg);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .nav-links a {
      position: relative;
      display: inline-flex;
      align-items: center;
      padding: 10px 16px;
      font-size: 15px;
      color: var(--text);
      border-radius: 8px;
      transition: color 0.25s;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      left: 50%;
      bottom: 2px;
      width: 0;
      height: 2px;
      transform: translateX(-50%);
      background: linear-gradient(90deg, var(--primary), var(--accent));
      border-radius: 2px;
      transition: width 0.3s;
    }

    .nav-links a:hover {
      color: var(--title);
    }

    .nav-links a:hover::after {
      width: calc(100% - 32px);
    }

    .nav-links a.active {
      color: var(--title);
    }

    .nav-links a.active::after {
      width: calc(100% - 32px);
    }

    .nav-links a.active::before {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 50%;
      transform: translateX(-50%);
      width: 4px;
      height: 4px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 8px var(--primary);
    }

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 44px;
      padding: 0 24px;
      border-radius: var(--radius-md);
      font-size: 15px;
      font-weight: 600;
      border: none;
      transition: all 0.25s;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), #1e5be0);
      color: #fff;
      box-shadow: 0 4px 20px var(--btn-glow);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 28px rgba(46, 124, 246, 0.55);
    }

    .btn-primary:active {
      transform: translateY(-1px);
      box-shadow: 0 3px 14px rgba(46, 124, 246, 0.4);
    }

    .btn-ghost {
      background: transparent;
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #fff;
      backdrop-filter: blur(8px);
    }

    .btn-ghost:hover {
      border-color: var(--primary);
      background: rgba(46, 124, 246, 0.08);
    }

    .btn-sm {
      min-height: 40px;
      padding: 0 18px;
      font-size: 14px;
    }

    .nav-toggle {
      display: none;
      flex-direction: column;
      justify-content: center;
      gap: 5px;
      width: 44px;
      height: 44px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 10px;
    }

    .nav-toggle span {
      display: block;
      height: 2px;
      width: 100%;
      background: var(--title);
      border-radius: 2px;
      transition: all 0.3s;
    }

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

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

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

    /* ========== 文章页主体 ========== */
    .article-page {
      padding-top: 74px;
      min-height: 80vh;
    }

    /* 面包屑 */
    .breadcrumb-bar {
      padding: 32px 0 14px;
      background:
        linear-gradient(to bottom, rgba(10, 14, 26, 0.88), var(--bg)),
        url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--muted);
      flex-wrap: wrap;
    }

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

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

    .breadcrumb .sep {
      color: rgba(255, 255, 255, 0.2);
    }

    .breadcrumb .current {
      color: var(--text);
      max-width: 320px;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    /* 文章标题区 */
    .article-hero {
      padding: 28px 0 36px;
    }

    .article-hero .container {
      max-width: 860px;
    }

    .article-title {
      font-size: clamp(28px, 3.6vw, 42px);
      font-weight: 700;
      line-height: 1.35;
      color: var(--title);
      margin-bottom: 20px;
    }

    .article-meta {
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      font-size: 14px;
      color: var(--muted);
    }

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

    .meta-item i {
      color: var(--primary);
      font-size: 13px;
    }

    .category-badge {
      display: inline-flex;
      align-items: center;
      padding: 3px 12px;
      background: rgba(46, 124, 246, 0.15);
      color: var(--primary);
      border-radius: 100px;
      font-size: 13px;
      border: 1px solid rgba(46, 124, 246, 0.3);
    }

    /* 正文区 */
    .article-section {
      padding: 0 0 48px;
    }

    .article-section .container {
      max-width: 860px;
    }

    .article-card {
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      backdrop-filter: blur(12px) saturate(120%);
      -webkit-backdrop-filter: blur(12px) saturate(120%);
      padding: 40px 48px;
    }

    .article-content {
      font-size: 16px;
      line-height: 1.85;
      color: var(--text);
      word-break: break-word;
    }

    .article-content h2 {
      font-size: 24px;
      color: var(--title);
      margin: 36px 0 16px;
      line-height: 1.4;
    }

    .article-content h3 {
      font-size: 20px;
      color: var(--title);
      margin: 28px 0 12px;
    }

    .article-content p {
      margin-bottom: 18px;
    }

    .article-content img {
      border-radius: 12px;
      margin: 24px 0;
    }

    .article-content blockquote {
      border-left: 4px solid var(--primary);
      background: rgba(46, 124, 246, 0.08);
      padding: 16px 20px;
      border-radius: 0 10px 10px 0;
      margin: 20px 0;
      color: var(--title);
    }

    .article-content ul,
    .article-content ol {
      margin: 16px 0 20px;
      padding-left: 20px;
    }

    .article-content li {
      margin-bottom: 8px;
    }

    .article-content a {
      color: var(--primary);
      border-bottom: 1px solid rgba(46, 124, 246, 0.4);
      transition: all 0.2s;
    }

    .article-content a:hover {
      color: var(--accent);
      border-bottom-color: var(--accent);
    }

    /* 内容未找到 */
    .not-found {
      text-align: center;
      padding: 80px 24px;
    }

    .not-found .icon-warp {
      width: 72px;
      height: 72px;
      border-radius: 50%;
      background: rgba(46, 124, 246, 0.12);
      border: 1px solid rgba(46, 124, 246, 0.3);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 28px;
      color: var(--primary);
      margin-bottom: 24px;
    }

    .not-found h1 {
      color: var(--title);
      font-size: 32px;
      margin-bottom: 12px;
    }

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

    /* 相关推荐 */
    .related-section {
      padding: 40px 0 32px;
    }

    .related-section .container {
      max-width: 860px;
    }

    .related-title {
      font-size: 22px;
      font-weight: 700;
      color: var(--title);
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .related-title::before {
      content: '';
      width: 4px;
      height: 20px;
      border-radius: 4px;
      background: linear-gradient(180deg, var(--primary), var(--accent));
    }

    .related-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .related-card {
      display: block;
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.01));
      border: 1px solid var(--border);
      border-radius: 14px;
      padding: 18px;
      overflow: hidden;
      transition: all 0.3s;
    }

    .related-card:hover {
      border-color: rgba(46, 124, 246, 0.5);
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    .rc-cover {
      border-radius: 10px;
      overflow: hidden;
      margin-bottom: 14px;
      aspect-ratio: 16 / 9;
      background: linear-gradient(135deg, rgba(46,124,246,0.4), rgba(0,195,217,0.3));
    }

    .rc-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s;
    }

    .related-card:hover .rc-cover img {
      transform: scale(1.04);
    }

    .related-card h3 {
      font-size: 16px;
      line-height: 1.5;
      color: var(--title);
      margin-bottom: 10px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .rc-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 13px;
      color: var(--muted);
    }

    /* 返回入口 */
    .back-bar {
      text-align: center;
      padding: 24px 0 16px;
    }

    .back-bar .btn {
      background: rgba(255,255,255,0.04);
      border: 1px solid var(--border);
      color: var(--text);
    }

    .back-bar .btn:hover {
      border-color: var(--primary);
      color: var(--title);
      background: rgba(46,124,246,0.08);
    }

    /* 文章底部 CTA */
    .article-cta {
      padding: 32px 0 72px;
    }

    .article-cta .container {
      max-width: 860px;
    }

    .cta-inner {
      background: linear-gradient(135deg, rgba(46,124,246,0.12), rgba(0,195,217,0.08));
      border: 1px solid rgba(46, 124, 246, 0.3);
      border-radius: 20px;
      padding: 44px 40px;
      text-align: center;
    }

    .cta-inner h3 {
      color: var(--title);
      font-size: 22px;
      margin-bottom: 12px;
    }

    .cta-inner p {
      color: var(--text);
      margin-bottom: 24px;
      font-size: 15px;
    }

    /* ========== Footer ========== */
    .footer {
      background: #070a14;
      border-top: 1px solid rgba(46, 124, 246, 0.3);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      padding: 60px 0 40px;
    }

    .footer-brand p {
      font-size: 14px;
      color: var(--muted);
      margin-top: 14px;
      max-width: 300px;
      line-height: 1.7;
    }

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

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

    .footer-links a {
      color: var(--muted);
      font-size: 14px;
      transition: color 0.2s;
    }

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

    .footer-contact li {
      color: var(--muted);
      font-size: 14px;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
    }

    .footer-contact i {
      color: var(--primary);
      margin-right: 10px;
      width: 16px;
      text-align: center;
      flex-shrink: 0;
    }

    .footer-copy {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      text-align: center;
      padding: 22px 0;
      font-size: 13px;
      color: #4a5a76;
    }

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

    @media (max-width: 640px) {
      .container {
        padding: 0 16px;
      }

      .nav-cta .btn {
        display: none;
      }

      .nav-toggle {
        display: flex;
      }

      .nav-links {
        position: fixed;
        top: 74px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: #0b111f;
        padding: 16px 16px 24px;
        gap: 2px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-120%);
        transition: transform 0.3s ease;
        z-index: 99;
        box-shadow: 0 20px 40px rgba(0,0,0,0.35);
      }

      .nav-links.open {
        transform: translateY(0);
      }

      .nav-links a {
        width: 100%;
        padding: 14px 16px;
        font-size: 16px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        border-radius: 6px;
      }

      .nav-links a::after,
      .nav-links a.active::after,
      .nav-links a.active::before {
        display: none;
      }

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

      .breadcrumb {
        font-size: 13px;
        gap: 6px;
      }

      .breadcrumb .current {
        max-width: 220px;
      }

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

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

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

      .cta-inner {
        padding: 32px 24px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
    }

/* roulang page: category2 */
:root {
            --bg-color: #0a0e1a;
            --bg-secondary: #0e1524;
            --panel-glass: rgba(255, 255, 255, 0.04);
            --primary: #2e7cf6;
            --accent: #00c3d9;
            --title-color: #edf2ff;
            --body-text: #a4b1cd;
            --muted-text: #6f7f9c;
            --border-color: rgba(255, 255, 255, 0.08);
            --success: #20c997;
            --card-highlight: rgba(46, 124, 246, 0.6);
            --glow: rgba(46, 124, 246, 0.45);
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 28px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 12px 36px rgba(0, 0, 0, 0.4);
            --font-cn: "PingFang SC", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

        body.nav-open {
            overflow: hidden;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }

        ul {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            letter-spacing: 0.3px;
            line-height: 1.4;
        }

        .btn-primary {
            background: linear-gradient(135deg, #2e7cf6, #1e5be0);
            color: #fff;
            box-shadow: 0 4px 20px var(--glow);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(46, 124, 246, 0.55);
            color: #fff;
        }

        .btn-primary:active {
            transform: translateY(1px);
            filter: brightness(0.92);
        }

        .btn-glass {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
        }

        .btn-glass:hover {
            border-color: var(--primary);
            background: rgba(46, 124, 246, 0.08);
            color: #fff;
        }

        .btn-sm {
            min-height: 40px;
            padding: 8px 20px;
            font-size: 14px;
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: transparent;
            transition: background 0.4s ease, box-shadow 0.4s ease;
            padding: 14px 0;
        }

        .site-header.scrolled {
            background: rgba(8, 12, 24, 0.72);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: 0 1px 0 rgba(46, 124, 246, 0.25), 0 8px 32px rgba(0, 0, 0, 0.3);
            padding: 10px 0;
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--title-color);
            white-space: nowrap;
        }

        .logo-mark {
            width: 20px;
            height: 20px;
            border-radius: 6px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: inline-block;
            box-shadow: 0 0 12px rgba(46, 124, 246, 0.6);
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }

        .nav-links a {
            display: inline-block;
            padding: 8px 14px;
            color: var(--body-text);
            font-size: 14px;
            font-weight: 500;
            border-radius: 6px;
            position: relative;
            transition: color 0.3s ease;
        }

        .nav-links a:hover {
            color: var(--title-color);
        }

        .nav-links a.active {
            color: var(--title-color);
        }

        .nav-links a.active::after {
            content: "";
            position: absolute;
            left: 50%;
            bottom: 2px;
            transform: translateX(-50%);
            width: 18px;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            box-shadow: 0 0 8px rgba(46, 124, 246, 0.8);
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.06);
            cursor: pointer;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            padding: 0;
            transition: border-color 0.3s;
        }

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

        .nav-toggle:hover {
            border-color: var(--primary);
        }

        /* ===== Mobile Menu Overlay ===== */
        .mobile-overlay {
            position: fixed;
            inset: 0;
            background: rgba(10, 14, 26, 0.98);
            z-index: 99;
            display: none;
            opacity: 0;
            transition: opacity 0.3s ease;
            overflow-y: auto;
        }

        .mobile-overlay.open {
            display: block;
            opacity: 1;
        }

        .mobile-overlay-content {
            padding: 90px 24px 40px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .mobile-overlay-content a {
            display: block;
            padding: 14px 8px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 17px;
            color: var(--title-color);
            font-weight: 500;
            border-radius: 6px;
        }

        .mobile-overlay-content a:hover {
            background: rgba(46, 124, 246, 0.08);
        }

        .mobile-overlay-content a.active {
            color: var(--primary);
            border-left: 3px solid var(--primary);
            padding-left: 12px;
        }

        .mobile-overlay .btn {
            margin-top: 24px;
            width: 100%;
        }

        /* ===== Hero / Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 170px 0 80px;
            background-image: linear-gradient(rgba(8, 12, 24, 0.85), rgba(10, 14, 26, 0.92)), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }

        .page-banner::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: linear-gradient(rgba(46, 124, 246, 0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(46, 124, 246, 0.08) 1px, transparent 1px);
            background-size: 48px 48px;
            pointer-events: none;
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            font-size: 13px;
            color: var(--muted-text);
            margin-bottom: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

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

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

        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.25);
        }

        .page-banner h1 {
            font-size: clamp(34px, 4.2vw, 48px);
            font-weight: 700;
            line-height: 1.2;
            color: var(--title-color);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .page-banner .banner-desc {
            font-size: 17px;
            line-height: 1.8;
            color: var(--body-text);
            max-width: 680px;
        }

        /* ===== Section Shared ===== */
        .section {
            padding: 88px 0;
        }

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

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

        .section-header .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--accent);
            letter-spacing: 2px;
            font-weight: 600;
            margin-bottom: 12px;
            text-transform: none;
        }

        .section-header h2 {
            font-size: clamp(28px, 3vw, 34px);
            font-weight: 700;
            color: var(--title-color);
            line-height: 1.3;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .section-header p {
            max-width: 560px;
            color: var(--body-text);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ===== Info Cards ===== */
        .info-card {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
            height: 100%;
            position: relative;
            overflow: hidden;
            backdrop-filter: blur(12px) saturate(120%);
            -webkit-backdrop-filter: blur(12px) saturate(120%);
        }

        .info-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
        }

        .info-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover), 0 0 0 1px rgba(46, 124, 246, 0.3);
            border-color: rgba(46, 124, 246, 0.5);
        }

        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(46, 124, 246, 0.25), rgba(0, 195, 217, 0.15));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent);
            margin-bottom: 18px;
            border: 1px solid rgba(46, 124, 246, 0.25);
        }

        .info-card h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--title-color);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .info-card p {
            font-size: 14.5px;
            color: var(--body-text);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .info-card .card-link {
            font-size: 14px;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            transition: color 0.3s ease, gap 0.3s ease;
        }

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

        /* ===== Cover Image Card ===== */
        .cover-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .cover-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover), 0 0 0 1px rgba(46, 124, 246, 0.35);
        }

        .cover-card .cover-img {
            aspect-ratio: 16/10;
            overflow: hidden;
            position: relative;
            background: linear-gradient(135deg, #1a2744, #0e1830);
        }

        .cover-card .cover-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .cover-card:hover .cover-img img {
            transform: scale(1.04);
        }

        .cover-card .cover-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(8, 12, 24, 0.7);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }

        .cover-card .cover-body {
            padding: 22px 24px 26px;
            flex: 1;
        }

        .cover-card .cover-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--title-color);
            margin-bottom: 10px;
            line-height: 1.45;
        }

        .cover-card .cover-body p {
            font-size: 14px;
            color: var(--body-text);
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .cover-card .cover-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--muted-text);
        }

        /* ===== Feature Split ===== */
        .feature-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .feature-split.reverse {
            direction: rtl;
        }

        .feature-split.reverse>* {
            direction: ltr;
        }

        .feature-text .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--accent);
            letter-spacing: 2px;
            font-weight: 600;
            margin-bottom: 14px;
        }

        .feature-text h2 {
            font-size: clamp(26px, 3vw, 32px);
            font-weight: 700;
            color: var(--title-color);
            line-height: 1.35;
            margin-bottom: 16px;
        }

        .feature-text p {
            color: var(--body-text);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .feature-points {
            margin: 0 0 28px;
            padding: 0;
            list-style: none;
        }

        .feature-points li {
            padding: 7px 0 7px 28px;
            position: relative;
            font-size: 15px;
            color: var(--body-text);
            line-height: 1.7;
        }

        .feature-points li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 15px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            box-shadow: 0 0 10px rgba(46, 124, 246, 0.6);
        }

        .feature-visual {
            position: relative;
        }

        .feature-visual .main-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            background: linear-gradient(135deg, #1a2744, #0e1830);
            aspect-ratio: 4/3;
        }

        .feature-visual .main-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .glass-info {
            position: absolute;
            bottom: -18px;
            left: 20px;
            background: rgba(13, 20, 36, 0.9);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-color);
            border-radius: 14px;
            padding: 16px 22px;
            box-shadow: var(--shadow-card);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .glass-info .icon-circle {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(46, 124, 246, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 14px;
        }

        .glass-info strong {
            display: block;
            font-size: 14px;
            color: var(--title-color);
            font-weight: 600;
        }

        .glass-info span {
            font-size: 12px;
            color: var(--muted-text);
        }

        /* ===== FAQ ===== */
        .faq-wrapper {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .faq-item {
            border-bottom: 1px solid var(--border-color);
            transition: border-color 0.3s ease;
        }

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

        .faq-item.open {
            border-color: rgba(46, 124, 246, 0.4);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 500;
            color: var(--title-color);
            line-height: 1.4;
            min-height: 48px;
            transition: background 0.3s ease;
        }

        .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }

        .faq-question .faq-icon {
            width: 26px;
            height: 26px;
            flex-shrink: 0;
            border-radius: 50%;
            background: rgba(46, 124, 246, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--primary);
            transition: all 0.3s ease;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: rgba(46, 124, 246, 0.3);
            color: var(--accent);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.25s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 14.5px;
            color: var(--body-text);
            line-height: 1.75;
        }

        /* ===== CTA / Contact ===== */
        .contact-section {
            position: relative;
            overflow: hidden;
            background: linear-gradient(rgba(10, 14, 26, 0.9), rgba(14, 21, 36, 0.95)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 40px;
            align-items: start;
        }

        .contact-info .contact-card {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 18px 0;
        }

        .contact-info .contact-card i {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(46, 124, 246, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 17px;
            flex-shrink: 0;
        }

        .contact-info .contact-card h4 {
            font-size: 15px;
            color: var(--title-color);
            font-weight: 600;
            margin-bottom: 2px;
        }

        .contact-info .contact-card p {
            font-size: 14px;
            color: var(--muted-text);
        }

        .contact-form-wrap {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.03));
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 32px;
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .contact-form-wrap label {
            display: block;
            font-size: 13px;
            color: var(--body-text);
            margin-bottom: 6px;
            font-weight: 500;
        }

        .contact-form-wrap input,
        .contact-form-wrap textarea {
            width: 100%;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            color: var(--title-color);
            font-size: 15px;
            font-family: inherit;
            margin-bottom: 18px;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .contact-form-wrap input::placeholder,
        .contact-form-wrap textarea::placeholder {
            color: #64748b;
        }

        .contact-form-wrap input:focus,
        .contact-form-wrap textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 124, 246, 0.15);
        }

        .contact-form-wrap input.error,
        .contact-form-wrap textarea.error {
            border-color: #e74c3c;
        }

        /* ===== Footer ===== */
        .footer {
            background: #070a14;
            position: relative;
        }

        .footer::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
            gap: 40px;
            padding: 60px 0 40px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--muted-text);
            margin: 16px 0 20px;
            max-width: 280px;
            line-height: 1.7;
        }

        .footer h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--title-color);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .footer-links li,
        .footer-contact li {
            margin-bottom: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--muted-text);
            transition: color 0.3s ease, padding-left 0.3s ease;
        }

        .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .footer-contact li {
            font-size: 14px;
            color: var(--muted-text);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact i {
            color: var(--accent);
            font-size: 13px;
        }

        .footer-copy {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 20px 0;
        }

        .footer-copy .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-copy p,
        .footer-copy span {
            font-size: 13px;
            color: var(--muted-text);
        }

        /* ===== Category Page Specific ===== */
        .cat-feature-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin-bottom: 40px;
        }

        .cat-feature-card {
            padding: 32px;
            position: relative;
            overflow: hidden;
        }

        .cat-feature-card .cat-num {
            position: absolute;
            top: 20px;
            right: 24px;
            font-size: 56px;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.04);
            line-height: 1;
            font-family: inherit;
        }

        .cat-feature-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--title-color);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .cat-feature-card h3 i {
            color: var(--accent);
            font-size: 18px;
        }

        .cat-feature-card p {
            font-size: 14.5px;
            color: var(--body-text);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .cat-feature-card ul {
            margin: 0;
            padding: 0;
        }

        .cat-feature-card ul li {
            padding: 5px 0 5px 20px;
            position: relative;
            font-size: 14px;
            color: var(--body-text);
            line-height: 1.7;
        }

        .cat-feature-card ul li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 14px;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
        }

        .cat-spotlight {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: linear-gradient(135deg, rgba(46, 124, 246, 0.15), rgba(0, 195, 217, 0.08));
            border: 1px solid rgba(46, 124, 246, 0.25);
            padding: 36px;
            min-height: 220px;
            display: flex;
            align-items: center;
            margin-bottom: 28px;
        }

        .cat-spotlight::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(46, 124, 246, 0.15);
            filter: blur(60px);
            pointer-events: none;
        }

        .cat-spotlight-content {
            position: relative;
            z-index: 2;
            max-width: 100%;
        }

        .cat-spotlight-content h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--title-color);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .cat-spotlight-content h3 i {
            color: var(--accent);
        }

        .cat-spotlight-content p {
            color: var(--body-text);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 12px;
            max-width: 600px;
        }

        .cat-spotlight-content .btn {
            margin-top: 8px;
        }

        .cat-cover-strip {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }

        .cat-cover-strip .cover-card {
            box-shadow: none;
        }

        .cat-back-link {
            text-align: center;
            margin-top: 40px;
        }

        .cat-back-link a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 24px;
            border: 1px solid rgba(46, 124, 246, 0.3);
            border-radius: var(--radius-md);
            background: rgba(46, 124, 246, 0.06);
            transition: all 0.3s ease;
        }

        .cat-back-link a:hover {
            background: rgba(46, 124, 246, 0.15);
            border-color: var(--primary);
            color: var(--title-color);
        }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1024px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
            .feature-split {
                gap: 36px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .cat-cover-strip {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media screen and (max-width: 768px) {
            .section {
                padding: 60px 0;
            }
            .nav-links {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-cta .btn-primary {
                display: none;
            }
            .feature-split {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .feature-split.reverse {
                direction: ltr;
            }
            .contact-grid {
                grid-template-columns: 1fr;
            }
            .cat-feature-grid {
                grid-template-columns: 1fr;
            }
            .cat-spotlight {
                padding: 28px 24px;
            }
            .page-banner {
                padding: 130px 0 60px;
            }
        }

        @media screen and (max-width: 640px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .cat-cover-strip {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .contact-form-wrap {
                padding: 22px;
            }
            .glass-info {
                display: none;
                visibility: hidden;
            }
            .page-banner h1 {
                font-size: 30px;
            }
            .page-banner .banner-desc {
                font-size: 15px;
            }
            .section-header h2 {
                font-size: 26px;
            }
        }

        @media screen and (max-width: 520px) {
            .nav-wrap {
                flex-wrap: nowrap;
            }
            .nav-logo span {
                font-size: 16px;
            }
            .nav-cta {
                gap: 0;
            }
            .btn-sm {
                display: none;
            }
        }