/* roulang page: index */
:root{
  --bg:#070C16;
  --bg-2:#0B1424;
  --primary:#2DE1FC;
  --primary-2:#0EA5E9;
  --accent:#A855F7;
  --text:#F1F5F9;
  --text-2:#94A3B8;
  --text-3:#64748B;
  --border:rgba(255,255,255,0.08);
  --glass:rgba(255,255,255,0.04);
  --radius:16px;
  --radius-sm:12px;
  --shadow:0 8px 24px rgba(0,0,0,0.25);
  --shadow-hover:0 12px 40px rgba(0,0,0,0.4);
  --glow:rgba(45,225,252,0.45);
  --transition:.3s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;}
a:hover,a:focus{outline:none;}
img{max-width:100%;display:block;}
button{font-family:inherit;cursor:pointer;}
input,textarea{font-family:inherit;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:6rem 0;}
.section-header{max-width:560px;margin-bottom:3rem;}
.section-header .tag{
  display:inline-block;background:rgba(45,225,252,.1);color:var(--primary);
  border-radius:999px;padding:4px 14px;font-size:.8125rem;margin-bottom:16px;
  border:1px solid rgba(45,225,252,.15);
}
.section-header h2{font-size:clamp(1.5rem,2.6vw,2rem);line-height:1.3;margin-bottom:16px;}
.section-header p{color:var(--text-2);line-height:1.75;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;padding:13px 30px;font-size:.9375rem;font-weight:600;
  transition:var(--transition);border:1px solid transparent;text-decoration:none;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#062A35;
  box-shadow:0 0 24px rgba(45,225,252,.4);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 36px rgba(45,225,252,.65);}
.btn-primary:focus-visible{outline:2px solid rgba(45,225,252,.5);outline-offset:3px;}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.2);color:var(--text);}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);}
.btn-ghost:focus-visible{outline:2px solid rgba(45,225,252,.5);outline-offset:3px;}
.btn-sm{padding:8px 20px;font-size:.875rem;}

.site-header{
  position:fixed;top:0;left:0;width:100%;z-index:1000;height:64px;
  background:rgba(7,12,22,.82);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);transition:box-shadow .3s ease;
}
.site-header.scrolled{box-shadow:0 10px 30px rgba(0,0,0,.35);}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;}
.logo{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;}
.logo-icon{
  width:36px;height:36px;border-radius:10px;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  display:flex;align-items:center;justify-content:center;color:#062A35;flex-shrink:0;
}
.logo-text{font-size:1.1rem;font-weight:800;letter-spacing:.5px;}
.logo-text span{color:var(--primary);margin-left:2px;}
.site-nav{display:flex;align-items:center;gap:32px;}
.nav-link{
  position:relative;color:var(--text-2);text-decoration:none;font-size:.9375rem;font-weight:500;
  padding:4px 0;transition:color .3s ease;
}
.nav-link:hover{color:var(--text);}
.nav-link.active{color:var(--primary);}
.nav-link.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent));border-radius:2px;
  box-shadow:0 0 12px var(--glow);
}
.nav-actions{display:flex;align-items:center;gap:16px;}
.hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;background:transparent;border:1px solid var(--border);border-radius:8px;padding:8px;}
.hamburger span{display:block;height:2px;background:var(--text);border-radius:2px;transition:all .3s ease;}
.hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.active span:nth-child(2){opacity:0;}
.hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.hero{
  position:relative;min-height:88vh;display:flex;align-items:center;padding:140px 0 80px;
  background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,22,.72) 0%,rgba(7,12,22,.8) 60%,rgba(7,12,22,.92) 100%);
}
.hero::after{
  content:"";position:absolute;top:-120px;right:-80px;width:440px;height:440px;border-radius:50%;
  background:var(--primary);opacity:.08;filter:blur(120px);
}
.hero-content{position:relative;z-index:2;max-width:700px;}
.hero-title{font-size:clamp(2rem,4vw,3.2rem);font-weight:800;line-height:1.2;color:var(--text);margin-bottom:20px;}
.hero-title .highlight{color:var(--primary);text-shadow:0 0 30px rgba(45,225,252,.4);}
.hero-subtitle{font-size:1.125rem;color:var(--text-2);line-height:1.75;max-width:560px;margin-bottom:32px;}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:56px;}
.trust-bar{display:flex;gap:28px;flex-wrap:wrap;color:var(--text-3);font-size:.875rem;}
.trust-bar span{display:flex;align-items:center;gap:8px;}
.trust-bar span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 8px var(--primary);}

.service-card{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;margin-bottom:56px;
}
.service-card:last-child{margin-bottom:0;}
.service-media{
  border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);
  box-shadow:var(--shadow);transition:var(--transition);background:var(--bg-2);
}
.service-media:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover),0 0 0 1px rgba(45,225,252,.15);}
.service-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.service-content h3{font-size:1.5rem;margin-bottom:16px;line-height:1.3;}
.service-content p{color:var(--text-2);line-height:1.75;margin-bottom:24px;}
.service-link{color:var(--primary);text-decoration:none;font-weight:500;display:inline-flex;align-items:center;gap:6px;}
.service-link:hover{text-decoration:underline;}
.service-card.reversed .service-media{order:2;}

.stats-section{background:var(--bg-2);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center;}
.stat-number{
  font-family:"Orbitron","Rajdhani","Segoe UI",sans-serif;font-size:clamp(2rem,3.4vw,3rem);
  font-weight:700;color:var(--primary);text-shadow:0 0 26px rgba(45,225,252,.35);line-height:1.2;
}
.stat-label{color:var(--text-2);margin-top:10px;font-size:.9375rem;}

.case-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;}
.case-card{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
  transition:var(--transition);
}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover),0 0 0 1px rgba(45,225,252,.15);}
.case-card img{width:100%;height:220px;object-fit:cover;}
.case-body{padding:24px;}
.case-body h3{font-size:1.25rem;margin-bottom:10px;}
.case-body p{color:var(--text-2);font-size:.9375rem;line-height:1.7;}
.case-link{color:var(--primary);text-decoration:none;font-weight:500;display:inline-flex;align-items:center;gap:6px;margin-top:16px;}
.case-link:hover{text-decoration:underline;}

.solution-section{background:var(--bg-2);}
.solution-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:56px;align-items:center;}
.solution-heading h2{font-size:clamp(1.5rem,2.6vw,2rem);line-height:1.3;margin-bottom:20px;}
.solution-heading p{color:var(--text-2);line-height:1.75;margin-bottom:20px;}
.solution-features{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.feature-card{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;transition:var(--transition);
}
.feature-card:hover{box-shadow:0 0 0 1px rgba(45,225,252,.2);transform:translateY(-2px);}
.feature-icon{width:42px;height:42px;border-radius:10px;background:rgba(45,225,252,.1);display:flex;align-items:center;justify-content:center;color:var(--primary);margin-bottom:14px;}
.feature-card h3{font-size:1.0625rem;margin-bottom:8px;}
.feature-card p{color:var(--text-2);font-size:.875rem;line-height:1.6;}

.news-list{display:flex;flex-direction:column;gap:16px;}
.news-card{
  display:flex;align-items:center;gap:24px;background:var(--glass);
  border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;
  text-decoration:none;transition:var(--transition);
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover),0 0 0 1px rgba(45,225,252,.15);}
.news-meta{display:flex;flex-direction:column;align-items:flex-start;min-width:110px;gap:6px;}
.news-meta time{color:var(--text-3);font-size:.8125rem;}
.badge{background:rgba(168,85,247,.15);color:var(--accent);border-radius:999px;padding:2px 12px;font-size:.75rem;border:1px solid rgba(168,85,247,.25);}
.news-body{flex:1;}
.news-body h3{font-size:1.125rem;color:var(--text);margin-bottom:6px;line-height:1.4;}
.news-body p{color:var(--text-2);font-size:.875rem;line-height:1.6;margin:0;}
.news-arrow{color:var(--primary);flex-shrink:0;font-size:1.25rem;transition:transform .3s ease;}
.news-card:hover .news-arrow{transform:translateX(4px);}
.empty-state{text-align:center;padding:32px;border:1px dashed var(--border);border-radius:var(--radius);color:var(--text-3);background:var(--glass);}

.faq-wrap{max-width:800px;margin:0 auto;}
.faq-item{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--radius);
  margin-bottom:16px;overflow:hidden;transition:box-shadow .3s ease;
}
.faq-item[open]{box-shadow:0 0 0 1px rgba(45,225,252,.18),0 0 30px rgba(45,225,252,.05);}
.faq-item summary{
  list-style:none;display:flex;justify-content:space-between;align-items:center;cursor:pointer;
  padding:22px 24px;font-weight:600;color:var(--text);font-size:1rem;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .faq-icon{color:var(--accent);font-size:1.5rem;line-height:1;transition:transform .3s ease;font-weight:400;}
.faq-item[open] summary .faq-icon{transform:rotate(45deg);}
.faq-answer{padding:0 24px 24px;color:var(--text-2);line-height:1.8;}

.cta-section{position:relative;padding:6rem 0;overflow:hidden;}
.cta-section::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity:.18;
}
.cta-section::after{
  content:"";position:absolute;bottom:-160px;left:50%;transform:translateX(-50%);
  width:600px;height:300px;border-radius:50%;background:var(--primary);opacity:.07;filter:blur(100px);
}
.cta-inner{
  position:relative;z-index:2;max-width:800px;margin:0 auto;text-align:center;
  background:rgba(11,20,36,.82);border:1px solid var(--border);border-radius:24px;
  padding:56px 48px;box-shadow:0 0 50px rgba(45,225,252,.06);
}
.cta-inner h2{font-size:clamp(1.75rem,3vw,2.5rem);line-height:1.3;margin-bottom:16px;}
.cta-inner p{color:var(--text-2);font-size:1.0625rem;margin-bottom:32px;}

.site-footer{background:#040810;border-top:1px solid var(--border);padding-top:64px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:48px;}
.footer-logo{display:flex;align-items:center;gap:10px;color:var(--text);margin-bottom:16px;}
.footer-logo .logo-icon{width:32px;height:32px;border-radius:8px;}
.footer-desc{color:var(--text-3);max-width:280px;line-height:1.75;}
.footer-col h4{font-size:1rem;margin-bottom:16px;color:var(--text);}
.footer-col a{display:block;color:var(--text-3);text-decoration:none;padding:6px 0;font-size:.9375rem;transition:color .3s ease;}
.footer-col a:hover{color:var(--primary);}
.footer-contact{list-style:none;}
.footer-contact li{display:flex;gap:10px;color:var(--text-3);margin-bottom:12px;font-size:.875rem;line-height:1.6;}
.footer-contact .contact-label{color:var(--text-2);flex-shrink:0;}
.footer-bottom{border-top:1px solid var(--border);padding:22px 0;margin-top:48px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--text-3);font-size:.8125rem;}
.footer-bottom span a{color:var(--text-3);text-decoration:none;}
.footer-bottom span a:hover{color:var(--primary);}

@media (max-width:991px){
  .section{padding:4rem 0;}
  .hamburger{display:flex;}
  .nav-actions .btn{display:none;}
  .site-nav{
    position:fixed;top:0;right:0;height:100vh;width:min(360px,80vw);
    background:rgba(7,12,22,.98);backdrop-filter:blur(20px);flex-direction:column;
    justify-content:center;gap:36px;padding:40px 32px;
    transform:translateX(100%);transition:transform .35s ease;border-left:1px solid var(--border);
  }
  .site-nav.open{transform:translateX(0);}
  body.nav-open{overflow:hidden;}
  .nav-link.active::after{bottom:-4px;}
  .service-card{grid-template-columns:1fr;gap:24px;}
  .service-card.reversed .service-media{order:0;}
  .service-media img{aspect-ratio:16/10;}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:24px;}
  .case-grid{grid-template-columns:1fr;}
  .solution-grid{grid-template-columns:1fr;gap:40px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}

@media (max-width:768px){
  .hero{padding:120px 0 64px;}
  .hero-cta .btn{width:100%;}
  .trust-bar{gap:16px;}
  .news-card{flex-wrap:wrap;gap:12px;}
  .news-meta{min-width:100%;flex-direction:row;justify-content:space-between;align-items:center;}
  .cta-inner{padding:40px 24px;}
}

@media (max-width:576px){
  .section{padding:3.5rem 0;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .solution-features{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;text-align:center;}
  .cta-inner{padding:32px 20px;}
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
:root {
  --bg-primary: #070C16;
  --bg-secondary: #0B1424;
  --bg-tertiary: #0D1A2E;
  --accent: #2DE1FC;
  --accent-dark: #0EA5E9;
  --accent-glow: rgba(45, 225, 252, 0.45);
  --accent-soft: rgba(45, 225, 252, 0.12);
  --purple: #A855F7;
  --purple-soft: rgba(168, 85, 247, 0.15);
  --text-main: #F1F5F9;
  --text-sub: #94A3B8;
  --text-dim: #64748B;
  --border: rgba(255, 255, 255, 0.08);
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-bg-strong: rgba(255, 255, 255, 0.06);
  --radius-card: 16px;
  --radius-img: 12px;
  --radius-btn: 999px;
  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 0 1px rgba(45, 225, 252, 0.15);
  --space-section: 6rem;
  --space-section-mobile: 3.5rem;
  --font-main: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", -apple-system, sans-serif;
  --font-display: "Orbitron", "Rajdhani", "PingFang SC", sans-serif;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  background-image:
    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: 44px 44px;
  color: var(--text-main);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

a:hover {
  color: #fff;
}

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

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header & Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(7, 12, 22, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition);
}

.site-header.is-scrolled {
  background: rgba(7, 12, 22, 0.95);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

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

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  border-radius: 10px;
  color: #070C16;
  font-size: 15px;
  box-shadow: 0 0 18px rgba(45, 225, 252, 0.35);
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  color: var(--text-main);
  white-space: nowrap;
}

.logo-text span {
  color: var(--accent);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  position: relative;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-sub);
  padding: 8px 2px;
  letter-spacing: 0.02em;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--purple));
  border-radius: 2px;
  box-shadow: 0 0 8px var(--accent-glow);
  transition: width var(--transition);
}

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

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

.nav-link.active {
  color: var(--accent);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #070C16;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--radius-btn);
  border: none;
  cursor: pointer;
  box-shadow: 0 0 20px rgba(45, 225, 252, 0.3);
  transition: transform var(--transition), box-shadow var(--transition);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 30px rgba(45, 225, 252, 0.5);
  color: #070C16;
}

.nav-cta:focus {
  outline: 2px solid rgba(45, 225, 252, 0.5);
  outline-offset: 3px;
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 10px;
  border-radius: 8px;
}

.hamburger:hover {
  background: rgba(255, 255, 255, 0.06);
}

.hamburger span {
  display: block;
  height: 2px;
  width: 24px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all var(--transition);
}

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

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

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

.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(7, 12, 22, 0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding: 40px;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu .nav-link {
  font-size: 1.4rem;
  padding: 14px 0;
  color: var(--text-main);
}

.mobile-menu .nav-link.active {
  color: var(--accent);
}

.mobile-menu-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-main);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.mobile-menu-close:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ===== Hero / Page Banner ===== */
.page-banner {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  padding: 140px 0 80px;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(7, 12, 22, 0.85) 0%, rgba(7, 12, 22, 0.7) 50%, rgba(7, 12, 22, 0.92) 100%);
}

.page-banner::after {
  content: '';
  position: absolute;
  top: -80px;
  right: -60px;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(45, 225, 252, 0.2) 0%, transparent 70%);
  pointer-events: none;
}

.banner-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--accent-soft);
  border: 1px solid rgba(45, 225, 252, 0.25);
  border-radius: var(--radius-btn);
  font-size: 0.8125rem;
  color: var(--accent);
  margin-bottom: 20px;
  letter-spacing: 0.04em;
}

.banner-badge i {
  font-size: 0.75rem;
}

.page-banner h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}

.page-banner h1 span {
  color: var(--accent);
}

.page-banner .banner-sub {
  font-size: 1rem;
  color: var(--text-sub);
  max-width: 560px;
  line-height: 1.8;
}

/* ===== Content Section ===== */
.content-section {
  padding: var(--space-section) 0;
  background: var(--bg-primary);
}

.content-section:nth-child(even) {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-head {
  text-align: center;
  margin-bottom: 50px;
}

.section-head h2 {
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  font-weight: 700;
  margin-bottom: 14px;
}

.section-head p {
  color: var(--text-sub);
  max-width: 640px;
  margin: 0 auto;
  font-size: 0.9375rem;
}

/* ===== Dual Content Block ===== */
.dual-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.dual-media {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.dual-media img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--radius-card);
  transition: transform 0.5s ease;
}

.dual-media:hover img {
  transform: scale(1.03);
}

.dual-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(7, 12, 22, 0.3) 0%, transparent 60%);
  border-radius: var(--radius-card);
}

.dual-text h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-main);
}

.dual-text h3 span {
  color: var(--accent);
}

.dual-text p {
  color: var(--text-sub);
  margin-bottom: 16px;
  line-height: 1.85;
}

.dual-text .sub-list {
  list-style: none;
  margin: 18px 0 0;
}

.dual-text .sub-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  color: var(--text-main);
  font-size: 0.9375rem;
}

.dual-text .sub-list li::before {
  content: '\f00c';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  left: 0;
  top: 1px;
  color: var(--accent);
  font-size: 0.875rem;
}

/* ===== Steps / Flow ===== */
.steps-wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.step-card {
  background: var(--glass-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 30px 24px;
  text-align: center;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
}

.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover), var(--shadow-glow);
  border-color: rgba(45, 225, 252, 0.3);
}

.step-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 12px;
  display: block;
}

.step-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 1.25rem;
  margin-bottom: 16px;
}

.step-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.step-card p {
  font-size: 0.875rem;
  color: var(--text-sub);
  line-height: 1.7;
}

/* ===== Comparison / Info Cards ===== */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
}

.info-card {
  background: var(--glass-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.info-card .card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  margin-bottom: 18px;
  background: var(--accent-soft);
  color: var(--accent);
}

.info-card h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.info-card p {
  font-size: 0.9375rem;
  color: var(--text-sub);
  line-height: 1.75;
}

.info-card .tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--purple-soft);
  border: 1px solid rgba(168, 85, 247, 0.25);
  border-radius: var(--radius-btn);
  font-size: 0.75rem;
  color: #c084fc;
}

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  background: var(--glass-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.faq-item.active {
  border-color: rgba(45, 225, 252, 0.3);
  box-shadow: 0 0 0 1px rgba(45, 225, 252, 0.08), 0 8px 24px rgba(0, 0, 0, 0.2);
}

.faq-q {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  user-select: none;
}

.faq-q .faq-num {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.faq-q .faq-title {
  flex: 1;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.5;
}

.faq-q .faq-icon {
  color: var(--purple);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
}

.faq-item.active .faq-a {
  max-height: 300px;
  padding: 0 24px 20px 72px;
}

.faq-a p {
  font-size: 0.9375rem;
  color: var(--text-sub);
  line-height: 1.8;
}

/* ===== CTA ===== */
.cta-section {
  padding: var(--space-section) 0;
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(45, 225, 252, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 50%, rgba(168, 85, 247, 0.1) 0%, transparent 60%);
}

.cta-section .container {
  position: relative;
  z-index: 2;
}

.cta-section h2 {
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  margin-bottom: 16px;
}

.cta-section p {
  color: var(--text-sub);
  max-width: 560px;
  margin: 0 auto 32px;
  font-size: 0.9375rem;
}

/* ===== Cross Links ===== */
.cross-links {
  padding: 60px 0 80px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.cross-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.cross-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px;
  background: var(--glass-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.cross-card::after {
  content: '';
  position: absolute;
  right: -30px;
  top: -30px;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, var(--accent-soft) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--transition);
}

.cross-card:hover {
  transform: translateY(-3px);
  border-color: rgba(45, 225, 252, 0.25);
  box-shadow: var(--shadow-hover);
}

.cross-card:hover::after {
  opacity: 1;
}

.cross-card .cross-icon {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  border-radius: 14px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.cross-card .cross-info {
  flex: 1;
}

.cross-card .cross-info h4 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.cross-card .cross-info p {
  font-size: 0.875rem;
  color: var(--text-sub);
  line-height: 1.6;
}

.cross-card .cross-arrow {
  color: var(--text-dim);
  transition: color var(--transition), transform var(--transition);
}

.cross-card:hover .cross-arrow {
  color: var(--accent);
  transform: translateX(4px);
}

/* ===== Buttons ===== */
.btn-primary, .btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  line-height: 1.4;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #070C16;
  box-shadow: 0 0 24px rgba(45, 225, 252, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 32px rgba(45, 225, 252, 0.55);
  color: #070C16;
}

.btn-primary:focus {
  outline: 2px solid rgba(45, 225, 252, 0.5);
  outline-offset: 3px;
}

.btn-secondary {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-main);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn-secondary:focus {
  outline: 2px solid rgba(45, 225, 252, 0.3);
  outline-offset: 3px;
}

/* ===== Footer ===== */
.site-footer {
  background: #050912;
  border-top: 1px solid var(--border);
  padding: 64px 0 0;
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(45, 225, 252, 0.3), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-logo .logo-text {
  font-size: 1.1rem;
}

.footer-desc {
  font-size: 0.875rem;
  color: var(--text-dim);
  line-height: 1.75;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 18px;
  color: var(--text-main);
}

.footer-col a {
  display: block;
  font-size: 0.875rem;
  color: var(--text-sub);
  margin-bottom: 10px;
  transition: color var(--transition), padding-left var(--transition);
}

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

.footer-contact {
  list-style: none;
}

.footer-contact li {
  font-size: 0.875rem;
  color: var(--text-sub);
  margin-bottom: 10px;
}

.contact-label {
  color: var(--text-dim);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8125rem;
  color: var(--text-dim);
}

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

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

/* ===== Responsive ===== */
@media (max-width: 991px) {
  .site-nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .nav-cta {
    display: none;
  }

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

  .dual-media img {
    height: 260px;
  }

  .steps-wrap {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .compare-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .cross-wrap {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767px) {
  .page-banner {
    min-height: 360px;
    padding: 110px 0 50px;
  }

  .page-banner h1 {
    font-size: 1.6rem;
  }

  .content-section {
    padding: 3.5rem 0;
  }

  .steps-wrap {
    grid-template-columns: 1fr;
  }

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

  .footer-bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .cta-section h2 {
    font-size: 1.5rem;
  }

  .btn-primary, .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .faq-q {
    padding: 16px;
  }

  .faq-item.active .faq-a {
    padding: 0 16px 16px;
  }

  .faq-q .faq-num {
    width: 26px;
    height: 26px;
    font-size: 0.75rem;
  }
}

@media (max-width: 575px) {
  .nav-inner {
    height: 56px;
  }

  .logo-text {
    font-size: 1rem;
  }

  .page-banner {
    min-height: 320px;
    padding: 100px 0 40px;
  }

  .page-banner h1 {
    font-size: 1.45rem;
  }

  .banner-badge {
    font-size: 0.75rem;
    padding: 4px 12px;
  }

  .dual-media img {
    height: 200px;
  }

  .cross-card {
    flex-direction: column;
    text-align: center;
  }

  .cross-card .cross-icon {
    margin-bottom: 8px;
  }
}

/* roulang page: article */
:root {
            --bg-primary: #070C16;
            --bg-secondary: #0B1424;
            --bg-third: rgba(255, 255, 255, 0.03);
            --primary: #2DE1FC;
            --primary-dark: #0EA5E9;
            --accent: #A855F7;
            --text-primary: #F1F5F9;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border: rgba(255, 255, 255, 0.08);
            --glass-bg: rgba(255, 255, 255, 0.04);
            --glow: rgba(45, 225, 252, 0.45);
            --radius: 16px;
            --radius-sm: 12px;
            --shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.4);
            --transition: 0.3s ease;
            --container: 1200px;
            --header-height: 64px;
            --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
        }

        body::before {
            content: '';
            position: fixed;
            inset: 0;
            background-image: linear-gradient(rgba(45, 225, 252, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(45, 225, 252, 0.03) 1px, transparent 1px);
            background-size: 60px 60px;
            pointer-events: none;
            z-index: 0;
        }

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

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

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

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

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: var(--header-height);
            background: rgba(7, 12, 22, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow var(--transition), background var(--transition);
        }

        .site-header.scrolled {
            background: rgba(7, 12, 22, 0.95);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 0.625rem;
            flex-shrink: 0;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, rgba(45, 225, 252, 0.2), rgba(168, 85, 247, 0.15));
            border: 1px solid rgba(45, 225, 252, 0.3);
            color: var(--primary);
        }

        .logo-text {
            font-size: 1.125rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }

        .logo-text span {
            color: var(--primary);
        }

        .site-nav {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }

        .nav-link {
            position: relative;
            display: inline-block;
            padding: 0.5rem 1rem;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: color var(--transition);
        }

        .nav-link:hover,
        .nav-link:focus-visible {
            color: var(--primary);
            outline: none;
        }

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

        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 1rem;
            right: 1rem;
            bottom: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), transparent);
            border-radius: 2px;
            box-shadow: 0 0 12px var(--glow);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .nav-cta {
            font-size: 0.875rem;
            padding: 0.5rem 1.25rem;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            background: transparent;
            border: none;
            border-radius: 10px;
            cursor: pointer;
            padding: 0 10px;
        }

        .hamburger span {
            display: block;
            height: 2px;
            width: 100%;
            background: var(--text-primary);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

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

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

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

        /* ===== Buttons ===== */
        .btn-primary,
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.75rem;
            border-radius: 999px;
            font-size: 0.9375rem;
            font-weight: 600;
            transition: all var(--transition);
            cursor: pointer;
            border: none;
            line-height: 1.2;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #070C16;
            box-shadow: 0 0 24px rgba(45, 225, 252, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 36px rgba(45, 225, 252, 0.6);
        }

        .btn-primary:focus-visible {
            outline: 2px solid rgba(45, 225, 252, 0.5);
            outline-offset: 3px;
        }

        .btn-secondary {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
        }

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

        .btn-secondary:focus-visible {
            outline: 2px solid rgba(45, 225, 252, 0.5);
            outline-offset: 3px;
        }

        .btn-sm {
            padding: 0.5rem 1.25rem;
            font-size: 0.875rem;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            padding: calc(var(--header-height) + 1.5rem) 0 0;
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.875rem;
            color: var(--text-muted);
            padding: 1rem 0;
        }

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

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

        .breadcrumb-sep {
            color: var(--text-muted);
            opacity: 0.5;
            font-size: 0.75rem;
        }

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

        .breadcrumb-current {
            color: var(--text-primary);
            font-weight: 500;
            overflow: hidden;
            white-space: nowrap;
            text-overflow: ellipsis;
            max-width: 360px;
        }

        /* ===== Article Main ===== */
        .article-main {
            position: relative;
            padding: 0 0 3rem;
        }

        .article-main::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80%;
            max-width: 900px;
            height: 320px;
            background: radial-gradient(ellipse at center, rgba(45, 225, 252, 0.07) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
        }

        .article-container {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        .article-header {
            padding: 2.5rem 0 1.5rem;
            text-align: center;
        }

        .article-category-tag {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.875rem;
            border-radius: 999px;
            background: rgba(168, 85, 247, 0.15);
            border: 1px solid rgba(168, 85, 247, 0.3);
            color: #D8B4FE;
            font-size: 0.8125rem;
            font-weight: 500;
            margin-bottom: 1.25rem;
        }

        .article-title {
            font-size: clamp(1.75rem, 3.2vw, 2.5rem);
            line-height: 1.2;
            color: var(--text-primary);
            margin-bottom: 1.25rem;
            font-weight: 800;
            letter-spacing: -0.02em;
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 1.5rem;
            color: var(--text-muted);
            font-size: 0.875rem;
        }

        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .meta-item svg {
            width: 15px;
            height: 15px;
            opacity: 0.6;
            flex-shrink: 0;
        }

        .meta-divider {
            color: var(--text-muted);
            opacity: 0.3;
        }

        /* ===== Article Content ===== */
        .article-body {
            padding: 2.5rem 2.75rem;
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .article-content {
            font-size: 1rem;
            line-height: 1.85;
            color: #E2E8F0;
        }

        .article-content>*+* {
            margin-top: 1.25rem;
        }

        .article-content h2 {
            font-size: 1.5rem;
            color: var(--text-primary);
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            font-weight: 700;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--border);
        }

        .article-content h3 {
            font-size: 1.25rem;
            color: var(--text-primary);
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            font-weight: 600;
        }

        .article-content p {
            margin: 1.25rem 0;
        }

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

        .article-content a:hover {
            color: #A5F3FC;
        }

        .article-content ul,
        .article-content ol {
            margin: 1.25rem 0;
            padding-left: 1.25rem;
        }

        .article-content ul li,
        .article-content ol li {
            margin: 0.5rem 0;
            padding-left: 0.375rem;
        }

        .article-content ul li::marker {
            color: var(--primary);
        }

        .article-content ol li::marker {
            color: var(--primary);
            font-weight: 600;
        }

        .article-content blockquote {
            border-left: 3px solid var(--primary);
            background: rgba(45, 225, 252, 0.06);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 12px 12px 0;
            color: var(--text-secondary);
            font-style: normal;
        }

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

        .article-content img {
            max-width: 100%;
            border-radius: var(--radius-sm);
            margin: 1.5rem 0;
            border: 1px solid var(--border);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.9375rem;
        }

        .article-content table th,
        .article-content table td {
            border: 1px solid var(--border);
            padding: 0.75rem 1rem;
            text-align: left;
        }

        .article-content table th {
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
            font-weight: 600;
        }

        .article-content table tr:nth-child(even) {
            background: rgba(255, 255, 255, 0.02);
        }

        .article-content code {
            background: rgba(255, 255, 255, 0.08);
            padding: 0.125rem 0.375rem;
            border-radius: 4px;
            font-size: 0.875em;
            color: #A5F3FC;
            font-family: 'SFMono-Regular', Consolas, monospace;
        }

        .article-content pre {
            background: #0B1424;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 1.25rem;
            overflow-x: auto;
            margin: 1.5rem 0;
            line-height: 1.6;
        }

        .article-content pre code {
            background: none;
            padding: 0;
            color: #E2E8F0;
        }

        .article-content hr {
            border: none;
            border-top: 1px solid var(--border);
            margin: 2rem 0;
        }

        /* ===== Article Empty ===== */
        .article-empty {
            text-align: center;
            padding: 4rem 2rem;
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid var(--border);
            border-radius: var(--radius);
        }

        .empty-icon {
            width: 72px;
            height: 72px;
            margin: 0 auto 1.5rem;
            border-radius: 50%;
            background: rgba(45, 225, 252, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
        }

        .empty-icon svg {
            width: 34px;
            height: 34px;
        }

        .article-empty h2 {
            font-size: 1.5rem;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
        }

        .article-empty p {
            color: var(--text-secondary);
            margin-bottom: 2rem;
            max-width: 380px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 4rem 0;
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
        }

        .related-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 2rem;
        }

        .related-header h2 {
            font-size: 1.5rem;
            color: var(--text-primary);
            font-weight: 700;
        }

        .related-header .related-more {
            font-size: 0.875rem;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
        }

        .related-header .related-more:hover {
            color: var(--primary);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .related-card {
            background: var(--glass-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
            display: block;
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg), 0 0 0 1px rgba(45, 225, 252, 0.15);
            border-color: rgba(45, 225, 252, 0.3);
        }

        .related-thumb {
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #0B1424;
        }

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

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

        .related-info {
            padding: 1.125rem 1.25rem 1.25rem;
        }

        .related-tag {
            display: inline-block;
            font-size: 0.75rem;
            color: #D8B4FE;
            background: rgba(168, 85, 247, 0.12);
            padding: 0.125rem 0.625rem;
            border-radius: 999px;
            margin-bottom: 0.625rem;
            letter-spacing: 0.02em;
        }

        .related-info h3 {
            font-size: 1rem;
            color: var(--text-primary);
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 0.75rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-date {
            font-size: 0.8125rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 0.375rem;
        }

        .related-date svg {
            width: 13px;
            height: 13px;
            opacity: 0.5;
        }

        /* ===== CTA Section ===== */
        .article-cta {
            padding: 5rem 0;
            position: relative;
            overflow: hidden;
        }

        .cta-box {
            background: linear-gradient(135deg, rgba(45, 225, 252, 0.12) 0%, rgba(11, 20, 36, 0.92) 50%, rgba(168, 85, 247, 0.1) 100%);
            border: 1px solid rgba(45, 225, 252, 0.2);
            border-radius: 20px;
            padding: 3rem;
            text-align: center;
            position: relative;
            overflow: hidden;
            max-width: 900px;
            margin: 0 auto;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -60%;
            left: -20%;
            width: 140%;
            height: 200%;
            background: radial-gradient(circle at 30% 20%, rgba(45, 225, 252, 0.15) 0%, transparent 60%);
            pointer-events: none;
        }

        .cta-box h2 {
            font-size: clamp(1.375rem, 2.4vw, 1.75rem);
            color: var(--text-primary);
            margin-bottom: 0.75rem;
            font-weight: 700;
            position: relative;
        }

        .cta-box p {
            color: var(--text-secondary);
            margin-bottom: 2rem;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
            font-size: 0.9375rem;
            position: relative;
        }

        .cta-actions {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: #04080F;
            border-top: 1px solid var(--border);
            padding-top: 3.5rem;
            position: relative;
            z-index: 1;
        }

        .site-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(45, 225, 252, 0.4), transparent);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
            gap: 2rem;
            padding-bottom: 2.5rem;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }

        .footer-logo .logo-icon {
            width: 32px;
            height: 32px;
            border-radius: 9px;
        }

        .footer-logo .logo-text {
            font-size: 1.125rem;
            font-weight: 800;
            color: var(--text-primary);
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 0.875rem;
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }

        .footer-col a {
            display: block;
            color: var(--text-muted);
            font-size: 0.875rem;
            padding: 0.375rem 0;
            transition: color var(--transition), padding-left var(--transition);
        }

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

        .footer-contact {
            list-style: none;
        }

        .footer-contact li {
            color: var(--text-muted);
            font-size: 0.875rem;
            padding: 0.375rem 0;
            line-height: 1.6;
        }

        .contact-label {
            color: var(--text-secondary);
            font-weight: 500;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem;
            padding: 1.5rem 0;
            border-top: 1px solid var(--border);
            color: var(--text-muted);
            font-size: 0.8125rem;
        }

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

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

        /* ===== Responsive ===== */
        @media (max-width: 991px) {
            .site-nav {
                position: fixed;
                top: 0;
                right: -100%;
                bottom: 0;
                width: 320px;
                background: #0B1424;
                border-left: 1px solid var(--border);
                flex-direction: column;
                align-items: flex-start;
                gap: 0.5rem;
                padding: 6rem 2rem 2rem;
                transition: right 0.4s ease;
                box-shadow: -8px 0 30px rgba(0, 0, 0, 0.5);
                z-index: 1000;
            }

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

            .nav-link {
                font-size: 1.0625rem;
                padding: 0.75rem 1rem;
                width: 100%;
                border-radius: 10px;
            }

            .nav-link.active::after {
                left: 1rem;
                right: auto;
                width: 40px;
            }

            .hamburger {
                display: flex;
            }

            .nav-cta {
                display: none;
            }

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

        @media (max-width: 767px) {
            .breadcrumb-bar {
                padding-top: calc(var(--header-height) + 1rem);
            }

            .article-body {
                padding: 1.75rem 1.5rem;
            }

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

            .related-thumb {
                aspect-ratio: 16 / 9;
            }

            .cta-box {
                padding: 2rem 1.5rem;
            }

            .cta-actions {
                flex-direction: column;
                align-items: center;
            }

            .cta-actions .btn-primary,
            .cta-actions .btn-secondary {
                width: 100%;
                max-width: 280px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.75rem;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .article-meta {
                gap: 1rem;
                font-size: 0.8125rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

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

            .article-title {
                font-size: 1.625rem;
            }

            .article-body {
                padding: 1.5rem 1.25rem;
                border-radius: var(--radius-sm);
            }

            .article-content {
                font-size: 0.9375rem;
                line-height: 1.8;
            }

            .article-content h2 {
                font-size: 1.3125rem;
            }

            .article-content h3 {
                font-size: 1.125rem;
            }

            .breadcrumb-current {
                max-width: 180px;
            }

            .related-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.5rem;
            }

            .footer-bottom span {
                display: block;
                line-height: 1.8;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #070C16;
            --bg-secondary: #0B1424;
            --bg-deep: #050A12;
            --primary: #2DE1FC;
            --primary-dark: #0EA5E9;
            --accent: #A855F7;
            --text-primary: #F1F5F9;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.12);
            --glass-bg: rgba(255, 255, 255, 0.04);
            --glass-bg-strong: rgba(255, 255, 255, 0.06);
            --glow: rgba(45, 225, 252, 0.45);
            --glow-soft: rgba(45, 225, 252, 0.15);
            --radius: 16px;
            --radius-img: 12px;
            --shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.4);
            --transition: 0.3s ease;
            --container-width: 1200px;
            --spacer: 6rem;
            --header-height: 64px;
        }
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: -1;
            background:
                radial-gradient(ellipse at 15% 0%, rgba(45, 225, 252, 0.06), transparent 50%),
                radial-gradient(ellipse at 85% 100%, rgba(168, 85, 247, 0.04), transparent 50%),
                var(--bg-primary);
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
        }
        .section {
            padding: var(--spacer) 0;
        }
        .section-tight {
            padding: 4rem 0;
        }
        .section-header {
            margin-bottom: 3rem;
            max-width: 720px;
        }
        .section-header.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8125rem;
            color: var(--primary);
            background: rgba(45, 225, 252, 0.08);
            border: 1px solid rgba(45, 225, 252, 0.15);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .section-tag::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 8px var(--primary);
        }
        .section-title {
            font-size: clamp(1.5rem, 2.6vw, 2rem);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 0 24px;
            height: 46px;
            border-radius: 999px;
            font-size: 0.9375rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            transition: all 0.3s ease;
            outline: none;
            white-space: nowrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #071018;
            box-shadow: 0 0 24px var(--glow);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 32px var(--glow), 0 4px 16px rgba(45, 225, 252, 0.2);
            color: #071018;
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }
        .btn-outline {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
            background: rgba(45, 225, 252, 0.04);
        }
        .btn-outline:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }
        .btn-sm {
            height: 40px;
            padding: 0 20px;
            font-size: 0.875rem;
        }
        .btn-lg {
            height: 52px;
            padding: 0 32px;
            font-size: 1rem;
        }
        .btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }
        .btn:active {
            transform: scale(0.97);
        }
        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(7, 12, 22, 0.75);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            transition: all 0.3s ease;
        }
        .site-header.scrolled {
            background: rgba(5, 10, 18, 0.92);
            box-shadow: 0 4px 32px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 24px;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 9px;
            background: linear-gradient(135deg, rgba(45, 225, 252, 0.2), rgba(14, 165, 233, 0.1));
            border: 1px solid rgba(45, 225, 252, 0.25);
            color: var(--primary);
            flex-shrink: 0;
        }
        .logo-icon svg {
            width: 18px;
            height: 18px;
        }
        .logo-text {
            font-size: 1.125rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            line-height: 1.2;
        }
        .logo-text span {
            color: var(--primary);
        }
        .site-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-link {
            position: relative;
            padding: 8px 16px;
            font-size: 0.9375rem;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: all 0.3s ease;
            font-weight: 500;
        }
        .nav-link:hover {
            color: var(--text-primary);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: -2px;
            left: 16px;
            right: 16px;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), transparent);
            box-shadow: 0 0 8px var(--primary);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border);
        }
        .hamburger:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .hamburger span {
            display: block;
            width: 18px;
            height: 2px;
            background: currentColor;
            border-radius: 2px;
            position: relative;
            transition: all 0.3s ease;
        }
        .hamburger span::before,
        .hamburger span::after {
            content: "";
            position: absolute;
            left: 0;
            width: 18px;
            height: 2px;
            background: currentColor;
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .hamburger span::before {
            top: -6px;
        }
        .hamburger span::after {
            top: 6px;
        }
        .hamburger.active span {
            background: transparent;
        }
        .hamburger.active span::before {
            top: 0;
            transform: rotate(45deg);
        }
        .hamburger.active span::after {
            top: 0;
            transform: rotate(-45deg);
        }
        /* Mobile Nav Drawer */
        .mobile-menu {
            display: none;
        }
        /* Hero */
        .category-hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: calc(var(--header-height) + 60px) 0 60px;
            overflow: hidden;
        }
        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(7, 12, 22, 0.85) 0%, rgba(7, 12, 22, 0.72) 40%, rgba(7, 12, 22, 0.9) 100%);
            z-index: 1;
        }
        .category-hero::after {
            content: "";
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(45, 225, 252, 0.12), transparent 70%);
            z-index: 1;
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            background: rgba(45, 225, 252, 0.1);
            border: 1px solid rgba(45, 225, 252, 0.2);
            border-radius: 999px;
            font-size: 0.8125rem;
            color: var(--primary);
            margin-bottom: 22px;
        }
        .hero-title {
            font-size: clamp(2rem, 4vw, 3.2rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            max-width: 700px;
            margin-bottom: 20px;
        }
        .hero-title span {
            color: var(--primary);
        }
        .hero-subtitle {
            font-size: 1.0625rem;
            color: var(--text-secondary);
            max-width: 560px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 48px;
        }
        .hero-metrics {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
        }
        .hero-metric {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .hero-metric .metric-num {
            font-family: "Rajdhani", "Orbitron", "DIN Alternate", sans-serif;
            font-size: 1.875rem;
            font-weight: 700;
            color: var(--primary);
            text-shadow: 0 0 20px rgba(45, 225, 252, 0.3);
            line-height: 1.1;
        }
        .hero-metric .metric-label {
            font-size: 0.8125rem;
            color: var(--text-secondary);
        }
        /* Guide Cards */
        .guide-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .guide-card {
            background: linear-gradient(180deg, var(--glass-bg-strong), var(--glass-bg));
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px;
            transition: all 0.35s ease;
            position: relative;
            overflow: hidden;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }
        .guide-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(45, 225, 252, 0.3), transparent);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .guide-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover), 0 0 0 1px var(--glow-soft);
            border-color: rgba(45, 225, 252, 0.2);
        }
        .guide-card:hover::before {
            opacity: 1;
        }
        .guide-card .card-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(45, 225, 252, 0.1);
            border: 1px solid rgba(45, 225, 252, 0.2);
            color: var(--primary);
            margin-bottom: 20px;
        }
        .guide-card .card-icon svg {
            width: 22px;
            height: 22px;
        }
        .guide-card .card-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .guide-card .card-desc {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 18px;
        }
        .guide-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: 0.875rem;
            font-weight: 600;
        }
        .guide-card .card-link svg {
            width: 16px;
            height: 16px;
            transition: transform 0.3s ease;
        }
        .guide-card .card-link:hover svg {
            transform: translateX(4px);
        }
        /* Process Steps */
        .process-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .process-step {
            position: relative;
            padding: 32px 24px;
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: all 0.3s ease;
        }
        .process-step::before {
            counter-increment: step;
            content: counter(step, decimal-leading-zero);
            font-family: "Rajdhani", "Orbitron", sans-serif;
            font-size: 2.5rem;
            font-weight: 700;
            color: transparent;
            -webkit-text-stroke: 1px rgba(45, 225, 252, 0.4);
            display: block;
            margin-bottom: 16px;
            line-height: 1;
        }
        .process-step:hover {
            border-color: rgba(45, 225, 252, 0.25);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
        }
        .process-step .step-title {
            font-size: 1.0625rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .process-step .step-desc {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .process-arrow {
            display: none;
        }
        /* Audience Matrix */
        .audience-wrap {
            display: grid;
            grid-template-columns: 1fr 1.4fr;
            gap: 48px;
            align-items: center;
        }
        .audience-intro .section-title {
            margin-bottom: 16px;
        }
        .audience-intro p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .audience-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 18px;
        }
        .audience-item {
            background: var(--glass-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            transition: all 0.3s ease;
        }
        .audience-item:hover {
            background: var(--glass-bg-strong);
            border-color: rgba(168, 85, 247, 0.25);
            transform: translateY(-3px);
        }
        .audience-item .item-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: rgba(168, 85, 247, 0.12);
            border: 1px solid rgba(168, 85, 247, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .audience-item .item-icon svg {
            width: 18px;
            height: 18px;
        }
        .audience-item h4 {
            font-size: 0.9375rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .audience-item p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }
        /* Feature Content */
        .feature-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .feature-media {
            border-radius: var(--radius);
            overflow: hidden;
            position: relative;
            aspect-ratio: 4/3;
            box-shadow: var(--shadow);
        }
        .feature-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .feature-media:hover img {
            transform: scale(1.03);
        }
        .feature-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(7, 12, 22, 0.5));
            border-radius: var(--radius);
        }
        .feature-body .section-title {
            margin-bottom: 16px;
        }
        .feature-body>p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .feature-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 0.9375rem;
            color: var(--text-primary);
            line-height: 1.6;
        }
        .feature-list li::before {
            content: "";
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: rgba(45, 225, 252, 0.12);
            border: 1px solid rgba(45, 225, 252, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 0.75rem;
            margin-top: 2px;
        }
        .feature-list li.has-check::before {
            content: "✓";
            font-weight: 700;
        }
        /* Related Categories */
        .related-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
        }
        .related-cards {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .related-card {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--glass-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            transition: all 0.3s ease;
        }
        .related-card:hover {
            border-color: rgba(45, 225, 252, 0.25);
            background: var(--glass-bg-strong);
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
        }
        .related-card .related-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(45, 225, 252, 0.1);
            border: 1px solid rgba(45, 225, 252, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
        }
        .related-card .related-icon svg {
            width: 26px;
            height: 26px;
        }
        .related-card h3 {
            font-size: 1.0625rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .related-card p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .related-card .related-arrow {
            margin-left: auto;
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .related-card:hover .related-arrow {
            color: var(--primary);
            transform: translateX(4px);
        }
        /* FAQ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-item.active {
            border-color: rgba(45, 225, 252, 0.25);
            box-shadow: 0 0 0 1px rgba(45, 225, 252, 0.1);
        }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            user-select: none;
            width: 100%;
            text-align: left;
            color: var(--text-primary);
        }
        .faq-question .faq-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(168, 85, 247, 0.12);
            border: 1px solid rgba(168, 85, 247, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            flex-shrink: 0;
            font-family: "Rajdhani", sans-serif;
            font-weight: 700;
            font-size: 0.875rem;
        }
        .faq-question .faq-text {
            flex: 1;
            font-size: 0.9375rem;
            font-weight: 600;
            line-height: 1.5;
        }
        .faq-question .faq-toggle {
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }
        .faq-item.active .faq-toggle {
            transform: rotate(45deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.875rem;
            line-height: 1.75;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        /* CTA */
        .cta-section {
            position: relative;
            padding: 5rem 0;
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(7, 12, 22, 0.92) 30%, rgba(7, 12, 22, 0.96) 100%);
        }
        .cta-section::after {
            content: "";
            position: absolute;
            bottom: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(ellipse, rgba(45, 225, 252, 0.15), transparent 70%);
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: clamp(1.75rem, 3vw, 2.5rem);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
        }
        .cta-content p {
            color: var(--text-secondary);
            margin-bottom: 32px;
            font-size: 1rem;
        }
        .cta-content .btn {
            margin: 0 auto;
        }
        /* Footer */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--border);
            padding-top: 4rem;
        }
        .site-footer::before {
            content: "";
            display: block;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(45, 225, 252, 0.2), transparent);
            margin-bottom: 3rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 3rem;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }
        .footer-logo .logo-icon {
            width: 40px;
            height: 40px;
        }
        .footer-logo .logo-text {
            font-size: 1.25rem;
        }
        .footer-desc {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 0.9375rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 24px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), transparent);
            border-radius: 2px;
        }
        .footer-col a {
            display: block;
            font-size: 0.875rem;
            color: var(--text-secondary);
            padding: 5px 0;
            transition: all 0.3s ease;
        }
        .footer-col a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-contact li {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .footer-contact .contact-label {
            color: var(--text-muted);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            border-top: 1px solid var(--border);
            font-size: 0.8125rem;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }
        /* Responsive */
        @media (max-width: 991px) {
            :root {
                --spacer: 4.5rem;
            }
            .site-nav {
                display: none;
            }
            .header-actions .btn {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-menu {
                display: block;
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(5, 10, 18, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                z-index: 999;
                padding: 40px 24px;
                transform: translateX(100%);
                transition: transform 0.35s ease;
            }
            .mobile-menu.open {
                transform: translateX(0);
            }
            .mobile-menu .mobile-nav-link {
                display: block;
                font-size: 1.25rem;
                font-weight: 600;
                color: var(--text-secondary);
                padding: 16px 0;
                border-bottom: 1px solid var(--border);
                text-align: center;
            }
            .mobile-menu .mobile-nav-link.active {
                color: var(--primary);
            }
            .mobile-menu .mobile-cta {
                display: flex;
                flex-direction: column;
                gap: 12px;
                margin-top: 32px;
            }
            .process-steps {
                grid-template-columns: 1fr 1fr;
            }
            .audience-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .feature-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 767px) {
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .related-cards {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 576px) {
            :root {
                --spacer: 3.5rem;
                --header-height: 56px;
            }
            .container {
                padding: 0 20px;
            }
            .category-hero {
                min-height: auto;
                padding-top: calc(var(--header-height) + 40px);
                padding-bottom: 40px;
            }
            .hero-title {
                font-size: 1.875rem;
            }
            .hero-subtitle {
                font-size: 0.9375rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-metrics {
                gap: 24px;
                flex-direction: column;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .audience-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section-header {
                margin-bottom: 2rem;
            }
            .guide-card {
                padding: 24px;
            }
            .process-step {
                padding: 24px 20px;
            }
            .faq-question {
                padding: 16px 18px;
                gap: 12px;
            }
            .faq-question .faq-text {
                font-size: 0.875rem;
            }
            .faq-answer {
                padding: 0 18px;
                font-size: 0.8125rem;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
            .related-card {
                padding: 18px;
                gap: 14px;
            }
            .related-card .related-icon {
                width: 44px;
                height: 44px;
            }
            .cta-section {
                padding: 3.5rem 0;
            }
        }