/* roulang page: index */
/* Design System: Cyber-Neon Arcade & Deep Abyss (Style B) with Saigon Neon Nightlife Visual (Theme 5) */
:root {
  --primary-bg: #07070D;
  --secondary-bg: #0E0E1E;
  --accent-1: #A3E635;
  --accent-2: #06B6D4;
  --accent-1-glow: rgba(163, 230, 53, 0.45);
  --accent-2-glow: rgba(6, 182, 212, 0.45);
  --text-primary: #FFFFFF;
  --text-secondary: #94A3B8;
  --text-highlight: #F43F5E;
  --border-dim: rgba(148, 163, 184, 0.18);
  --border-glow: rgba(6, 182, 212, 0.35);
  --card-bg: rgba(255, 255, 255, 0.03);
  --card-bg-hover: rgba(255, 255, 255, 0.06);
  --shadow-glow: 0 8px 32px rgba(6, 182, 212, 0.12);
  --shadow-card-hover: 0 12px 40px rgba(163, 230, 53, 0.15);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --space-section: 5rem;
  --space-card-gap: 1.75rem;
  --max-width: 1280px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background-color: var(--primary-bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.25s ease, background 0.25s ease;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Typography */
h1, h2, h3 {
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 6vw, 4rem); }
h2 { font-size: clamp(2rem, 4.5vw, 2.75rem); }
h3 { font-size: 1.35rem; }

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.15rem;
  line-height: 1.65;
  max-width: 680px;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(7, 7, 13, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-dim);
  padding: 0 2rem;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  height: 72px;
}

.logo {
  font-weight: 800;
  font-size: 1.35rem;
  background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.main-nav a {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.95rem;
  position: relative;
  padding-bottom: 4px;
  transition: color 0.2s;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--text-primary);
}

.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-1);
  box-shadow: 0 0 10px var(--accent-1-glow);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-login {
  background: transparent;
  border: 1px solid var(--accent-2);
  color: var(--accent-2);
  padding: 0.55rem 1.35rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.25s;
}

.btn-login:hover {
  background: rgba(6, 182, 212, 0.12);
  box-shadow: 0 0 16px var(--accent-2-glow);
}

.btn-signup {
  background: var(--accent-1);
  border: none;
  color: var(--primary-bg);
  padding: 0.55rem 1.5rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  box-shadow: 0 0 18px var(--accent-1-glow);
  transition: all 0.25s;
}

.btn-signup:hover {
  background: #C0F54A;
  box-shadow: 0 0 28px rgba(163, 230, 53, 0.6);
  transform: translateY(-1px);
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.6rem;
  cursor: pointer;
}

/* Sections */
.section {
  padding: var(--space-section) 0;
}

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

.section-header {
  margin-bottom: 3rem;
}

.section-header h2 {
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.section-header.left {
  text-align: left;
}

/* Hero */
.hero {
  position: relative;
  padding: 5rem 0 4rem;
  background: linear-gradient(160deg, rgba(6,182,212,0.06) 0%, rgba(7,7,13,0) 40%);
  min-height: 85vh;
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content h1 {
  font-weight: 800;
  margin-bottom: 1.25rem;
  background: linear-gradient(to right, #FFFFFF, #A3E635);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  color: var(--text-secondary);
  font-size: 1.15rem;
  line-height: 1.7;
  margin-bottom: 2.25rem;
}

.hero-form {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.hero-input {
  flex: 1;
  min-width: 240px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-dim);
  border-radius: 10px;
  padding: 0.85rem 1.25rem;
  color: white;
  font-size: 1rem;
  transition: border 0.3s;
}

.hero-input:focus {
  outline: none;
  border-color: var(--accent-2);
  box-shadow: 0 0 0 3px rgba(6,182,212,0.15);
}

.hero-btn {
  background: var(--accent-1);
  border: none;
  color: #000;
  font-weight: 700;
  padding: 0.85rem 2rem;
  border-radius: 10px;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 0 22px var(--accent-1-glow);
}

.hero-btn:hover {
  background: #C8F75A;
  box-shadow: 0 0 34px rgba(163,230,53,0.55);
  transform: translateY(-2px);
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-visual img {
  max-width: 90%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-glow);
  box-shadow: var(--shadow-glow);
}

/* Commission Section */
.commission-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-card-gap);
}

.comm-card {
  background: var(--card-bg);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: all 0.3s;
}

.comm-card:hover {
  background: var(--card-bg-hover);
  border-color: var(--accent-2);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

.comm-icon {
  font-size: 2.5rem;
  margin-bottom: 1.25rem;
}

.comm-card h3 {
  margin-bottom: 0.5rem;
}

.comm-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Promo Materials */
.promo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.promo-item {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  border: 1px solid var(--border-dim);
  display: flex;
  gap: 1.5rem;
  align-items: center;
  transition: all 0.3s;
}

.promo-item:hover {
  border-color: var(--accent-1);
}

.promo-thumb {
  width: 120px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.promo-info h3 {
  font-size: 1.1rem;
  margin-bottom: 0.4rem;
}

.promo-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Payout */
.payout-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.step-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 2rem;
  border: 1px solid var(--border-dim);
  position: relative;
}

.step-num {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.75rem;
}

.step-card h3 {
  margin-bottom: 0.5rem;
}

.step-card p {
  color: var(--text-secondary);
}

/* Cases */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-card-gap);
}

.case-card {
  background: var(--card-bg);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s;
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

.case-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.case-body {
  padding: 1.5rem;
}

.case-body h3 {
  font-size: 1.15rem;
  margin-bottom: 0.4rem;
}

.case-meta {
  color: var(--accent-2);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.case-body p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Info Feed */
.info-feed {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2.5rem;
}

.feed-main {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.feed-item {
  background: var(--card-bg);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  gap: 1.5rem;
  transition: 0.3s;
  align-items: center;
}

.feed-item:hover {
  border-color: var(--accent-2);
}

.feed-thumb {
  width: 110px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.feed-content h3 {
  font-size: 1.05rem;
  margin-bottom: 0.3rem;
}

.feed-content p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.feed-sidebar {
  background: var(--card-bg);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  height: fit-content;
}

.feed-sidebar h3 {
  margin-bottom: 1rem;
  color: var(--accent-1);
}

.side-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.side-item {
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--border-dim);
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.side-item:hover {
  color: white;
}

/* CTA */
.cta-section {
  background: linear-gradient(135deg, rgba(6,182,212,0.08), rgba(163,230,53,0.05));
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 4rem 2rem;
  text-align: center;
}

.cta-section h2 {
  margin-bottom: 1rem;
}

.cta-section p {
  color: var(--text-secondary);
  max-width: 550px;
  margin: 0 auto 2rem;
}

/* FAB */
.fab {
  position: fixed;
  left: 1.5rem;
  bottom: 5rem;
  z-index: 50;
  width: 56px;
  height: 56px;
  background: rgba(7,7,13,0.8);
  backdrop-filter: blur(12px);
  border-radius: 16px;
  border: 2px solid transparent;
  background-clip: padding-box;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.35s;
  box-shadow: 0 0 22px var(--accent-2-glow);
  font-size: 1.6rem;
}

.fab::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 18px;
  padding: 2px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 1; }
}

.fab:hover {
  transform: scale(1.1);
  box-shadow: 0 0 34px rgba(6,182,212,0.6);
}

.fab:active {
  transform: scale(0.95);
}

.fab-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 12px;
  height: 12px;
  background: #EF4444;
  border-radius: 50%;
  box-shadow: 0 0 10px #EF4444;
}

/* Footer */
.site-footer {
  background: var(--secondary-bg);
  border-top: 1px solid var(--border-dim);
  padding: 4rem 0 2rem;
}

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

.footer-brand {
  font-size: 1.3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.75rem;
}

.footer-col p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-col h4 {
  margin-bottom: 1rem;
  font-size: 1rem;
  font-weight: 700;
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0.55rem;
  transition: color 0.25s;
}

.footer-col a:hover {
  color: var(--accent-1);
}

.footer-bottom {
  border-top: 1px solid var(--border-dim);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2rem; }
  .commission-grid, .payout-steps, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .info-feed { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .container { padding: 0 1.25rem; }
  .main-nav { display: none; }
  .mobile-menu-btn { display: block; }
  .commission-grid, .payout-steps, .case-grid, .promo-grid { grid-template-columns: 1fr; }
  .hero { padding: 3rem 0; min-height: auto; }
  .footer-grid { grid-template-columns: 1fr; }
  .fab { left: 0.75rem; bottom: 3rem; width: 48px; height: 48px; }
}

/* roulang page: article */
:root {
            --primary-bg: #07070D;
            --secondary-bg: #0E0E1E;
            --accent-1: #A3E635;
            --accent-2: #06B6D4;
            --accent-1-glow: rgba(163, 230, 53, 0.45);
            --accent-2-glow: rgba(6, 182, 212, 0.45);
            --text-primary: #FFFFFF;
            --text-secondary: #94A3B8;
            --text-highlight: #F43F5E;
            --border-dim: rgba(148, 163, 184, 0.18);
            --border-glow: rgba(6, 182, 212, 0.35);
            --card-bg: rgba(255, 255, 255, 0.03);
            --card-bg-hover: rgba(255, 255, 255, 0.06);
            --shadow-glow: 0 8px 32px rgba(6, 182, 212, 0.12);
            --shadow-card-hover: 0 12px 40px rgba(163, 230, 53, 0.15);
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --space-section: 5rem;
            --space-card-gap: 1.75rem;
            --max-width: 1280px;
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            background-color: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease, background 0.25s ease;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 2rem;
        }

        .section {
            padding: var(--space-section) 0;
        }

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

        .section-header {
            margin-bottom: 3rem;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }

        .section-subtitle {
            color: var(--text-secondary);
            font-size: 1.15rem;
            line-height: 1.65;
            max-width: 680px;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 90;
            background: rgba(7, 7, 13, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-dim);
            padding: 0 2rem;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: var(--max-width);
            margin: 0 auto;
            height: 72px;
        }

        .logo {
            font-weight: 800;
            font-size: 1.35rem;
            background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 0.35rem;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 2.25rem;
        }

        .main-nav a {
            font-weight: 500;
            color: var(--text-secondary);
            font-size: 0.95rem;
            position: relative;
            padding-bottom: 4px;
            transition: color 0.2s;
        }

        .main-nav a:hover,
        .main-nav a.active {
            color: var(--text-primary);
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-1);
            box-shadow: 0 0 10px var(--accent-1-glow);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-2);
            color: var(--accent-2);
            padding: 0.55rem 1.35rem;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.25s;
        }

        .btn-login:hover {
            background: rgba(6, 182, 212, 0.12);
            box-shadow: 0 0 16px var(--accent-2-glow);
        }

        .btn-signup {
            background: var(--accent-1);
            border: none;
            color: var(--primary-bg);
            padding: 0.55rem 1.5rem;
            border-radius: 8px;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            box-shadow: 0 0 18px var(--accent-1-glow);
            transition: all 0.25s;
        }

        .btn-signup:hover {
            background: #C0F54A;
            box-shadow: 0 0 28px rgba(163, 230, 53, 0.6);
            transform: translateY(-1px);
        }

        .mobile-menu-btn {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            cursor: pointer;
        }

        /* Article Hero */
        .article-hero {
            position: relative;
            padding: 3rem 0 2rem;
            background: linear-gradient(160deg, rgba(6,182,212,0.08) 0%, rgba(7,7,13,0) 50%);
            border-bottom: 1px solid var(--border-dim);
        }

        .article-hero-content {
            max-width: 860px;
            margin: 0 auto;
            text-align: left;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--text-secondary);
            font-size: 0.85rem;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }

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

        .breadcrumb a:hover {
            color: var(--accent-1);
        }

        .breadcrumb .separator {
            color: var(--text-secondary);
            opacity: 0.5;
        }

        .article-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 1.25rem;
            background: linear-gradient(to right, #FFFFFF, #A3E635);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            color: var(--text-secondary);
            font-size: 0.9rem;
            align-items: center;
        }

        .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .article-meta .category-tag {
            background: rgba(163, 230, 53, 0.12);
            color: var(--accent-1);
            padding: 0.25rem 0.85rem;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.8rem;
        }

        /* Article Body */
        .article-body-section {
            padding: 3rem 0;
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            align-items: start;
        }

        .article-main {
            min-width: 0;
        }

        .article-featured-img {
            margin-bottom: 2.5rem;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-glow);
            box-shadow: var(--shadow-glow);
        }

        .article-featured-img img {
            width: 100%;
            object-fit: cover;
            aspect-ratio: 16/9;
        }

        .article-content {
            color: var(--text-secondary);
            font-size: 1.05rem;
            line-height: 1.8;
        }

        .article-content h2 {
            color: var(--text-primary);
            font-size: 1.8rem;
            font-weight: 700;
            margin: 2.5rem 0 1rem;
            letter-spacing: -0.01em;
        }

        .article-content h3 {
            color: var(--text-primary);
            font-size: 1.4rem;
            font-weight: 600;
            margin: 2rem 0 0.75rem;
        }

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

        .article-content ul,
        .article-content ol {
            margin: 1rem 0 1.5rem 1.5rem;
        }

        .article-content li {
            margin-bottom: 0.5rem;
        }

        .article-content strong {
            color: var(--accent-1);
            font-weight: 600;
        }

        .article-content a {
            color: var(--accent-2);
            text-decoration: underline;
        }

        .article-content a:hover {
            color: var(--accent-1);
        }

        .article-content blockquote {
            border-left: 4px solid var(--accent-2);
            padding: 1.25rem 1.5rem;
            margin: 2rem 0;
            background: var(--card-bg);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-primary);
            box-shadow: var(--shadow-glow);
        }

        /* Sidebar */
        .article-sidebar {
            position: sticky;
            top: 100px;
        }

        .sidebar-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            margin-bottom: 1.5rem;
        }

        .sidebar-card h4 {
            color: var(--text-primary);
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .sidebar-card h4 i {
            color: var(--accent-2);
        }

        .sidebar-related-list {
            list-style: none;
        }

        .sidebar-related-list li {
            margin-bottom: 0.75rem;
            padding-bottom: 0.75rem;
            border-bottom: 1px solid var(--border-dim);
        }

        .sidebar-related-list li:last-child {
            border-bottom: none;
        }

        .sidebar-related-list a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: color 0.2s;
        }

        .sidebar-related-list a:hover {
            color: var(--accent-1);
        }

        .sidebar-cta {
            background: linear-gradient(135deg, rgba(6,182,212,0.15), rgba(163,230,53,0.1));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            text-align: center;
        }

        .sidebar-cta p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }

        .sidebar-cta .btn-cta-side {
            background: var(--accent-1);
            color: var(--primary-bg);
            font-weight: 700;
            padding: 0.7rem 1.5rem;
            border-radius: 8px;
            border: none;
            cursor: pointer;
            width: 100%;
            transition: all 0.25s;
            box-shadow: 0 0 15px var(--accent-1-glow);
        }

        .sidebar-cta .btn-cta-side:hover {
            background: #C0F54A;
            box-shadow: 0 0 25px rgba(163,230,53,0.55);
        }

        /* Related Posts Grid */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-card-gap);
        }

        .related-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s;
            cursor: pointer;
        }

        .related-card:hover {
            background: var(--card-bg-hover);
            border-color: var(--accent-2);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .related-card-body {
            padding: 1.25rem;
        }

        .related-card-body h5 {
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 0.5rem;
        }

        .related-card-body p {
            color: var(--text-secondary);
            font-size: 0.85rem;
            line-height: 1.5;
        }

        /* Newsletter Section */
        .newsletter-section {
            background: linear-gradient(135deg, rgba(6,182,212,0.08) 0%, rgba(163,230,53,0.05) 100%);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-lg);
            padding: 3rem 2rem;
            text-align: left;
        }

        .newsletter-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            align-items: center;
        }

        .newsletter-text h3 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }

        .newsletter-text p {
            color: var(--text-secondary);
            font-size: 1rem;
        }

        .newsletter-form {
            display: flex;
            gap: 0.75rem;
        }

        .newsletter-input {
            flex: 1;
            background: rgba(255,255,255,0.06);
            border: 1px solid var(--border-dim);
            border-radius: 10px;
            padding: 0.85rem 1.25rem;
            color: white;
            font-size: 1rem;
            transition: border 0.3s;
        }

        .newsletter-input:focus {
            outline: none;
            border-color: var(--accent-2);
            box-shadow: 0 0 0 3px rgba(6,182,212,0.15);
        }

        .newsletter-btn {
            background: var(--accent-2);
            border: none;
            color: white;
            font-weight: 700;
            padding: 0.85rem 2rem;
            border-radius: 10px;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: 0 0 18px var(--accent-2-glow);
        }

        .newsletter-btn:hover {
            background: #0ECBE7;
            box-shadow: 0 0 28px rgba(6,182,212,0.55);
        }

        /* Not Found */
        .not-found {
            text-align: left;
            padding: 5rem 2rem;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-dim);
        }

        .not-found h2 {
            color: var(--accent-1);
            margin-bottom: 1rem;
        }

        .not-found a {
            display: inline-block;
            margin-top: 1.5rem;
            background: var(--accent-2);
            color: white;
            padding: 0.75rem 1.75rem;
            border-radius: 8px;
            font-weight: 600;
            transition: all 0.25s;
        }

        .not-found a:hover {
            background: #0ECBE7;
            box-shadow: 0 0 18px var(--accent-2-glow);
        }

        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-dim);
            padding: 4rem 0 2rem;
            margin-top: var(--space-section);
        }

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

        .footer-brand {
            font-weight: 800;
            font-size: 1.2rem;
            margin-bottom: 0.75rem;
            background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer-col p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .footer-col h4 {
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .footer-col a {
            display: block;
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 0.6rem;
            transition: color 0.2s;
        }

        .footer-col a:hover {
            color: var(--accent-1);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-dim);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            color: var(--text-secondary);
            font-size: 0.85rem;
        }

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

            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }

            .sidebar-card,
            .sidebar-cta {
                margin-bottom: 0;
            }

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

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

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

        @media (max-width: 768px) {
            .main-nav {
                display: none;
                position: fixed;
                top: 72px;
                left: 0;
                width: 100%;
                background: rgba(7, 7, 13, 0.96);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 1.5rem;
                gap: 1rem;
                border-bottom: 1px solid var(--border-dim);
            }

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

            .mobile-menu-btn {
                display: block;
            }

            .header-actions {
                display: flex;
                gap: 0.5rem;
            }

            .btn-login,
            .btn-signup {
                padding: 0.45rem 1rem;
                font-size: 0.8rem;
            }

            .article-hero h1 {
                font-size: 2rem;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

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

            .section-header h2 {
                font-size: 1.7rem;
            }

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

        @media (max-width: 520px) {
            .container {
                padding: 0 1rem;
            }

            .article-hero h1 {
                font-size: 1.6rem;
            }

            .article-content {
                font-size: 0.95rem;
            }

            .newsletter-form {
                flex-direction: column;
            }

            .header-inner {
                height: 64px;
            }
        }

/* roulang page: category1 */
:root {
    --primary-bg: #07070D;
    --secondary-bg: #0E0E1E;
    --accent-1: #A3E635;
    --accent-2: #06B6D4;
    --accent-1-glow: rgba(163, 230, 53, 0.45);
    --accent-2-glow: rgba(6, 182, 212, 0.45);
    --text-primary: #FFFFFF;
    --text-secondary: #94A3B8;
    --text-highlight: #F43F5E;
    --border-dim: rgba(148, 163, 184, 0.18);
    --border-glow: rgba(6, 182, 212, 0.35);
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-bg-hover: rgba(255, 255, 255, 0.06);
    --shadow-glow: 0 8px 32px rgba(6, 182, 212, 0.12);
    --shadow-card-hover: 0 12px 40px rgba(163, 230, 53, 0.15);
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 8px;
    --space-section: 5rem;
    --space-card-gap: 1.75rem;
    --max-width: 1280px;
  }
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }
  img {
    max-width: 100%;
    height: auto;
    display: block;
  }
  a {
    text-decoration: none;
    color: inherit;
    transition: color 0.25s ease, background 0.25s ease;
  }
  .container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
  }
  .section-subtitle {
    color: var(--text-secondary);
    font-size: 1.15rem;
    line-height: 1.65;
    max-width: 680px;
  }
  /* Header & Navigation */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 90;
    background: rgba(7, 7, 13, 0.82);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border-dim);
    padding: 0 2rem;
  }
  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
    height: 72px;
  }
  .logo {
    font-weight: 800;
    font-size: 1.35rem;
    background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
    gap: 0.35rem;
  }
  .main-nav {
    display: flex;
    align-items: center;
    gap: 2.25rem;
  }
  .main-nav a {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.95rem;
    position: relative;
    padding-bottom: 4px;
    transition: color 0.2s;
  }
  .main-nav a:hover,
  .main-nav a.active {
    color: var(--text-primary);
  }
  .main-nav a.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-1);
    box-shadow: 0 0 10px var(--accent-1-glow);
  }
  .header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
  }
  .btn-login {
    background: transparent;
    border: 1px solid var(--accent-2);
    color: var(--accent-2);
    padding: 0.55rem 1.35rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.25s;
  }
  .btn-login:hover {
    background: rgba(6, 182, 212, 0.12);
    box-shadow: 0 0 16px var(--accent-2-glow);
  }
  .btn-signup {
    background: var(--accent-1);
    border: none;
    color: var(--primary-bg);
    padding: 0.55rem 1.5rem;
    border-radius: 8px;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    box-shadow: 0 0 18px var(--accent-1-glow);
    transition: all 0.25s;
  }
  .btn-signup:hover {
    background: #C0F54A;
    box-shadow: 0 0 28px rgba(163, 230, 53, 0.6);
    transform: translateY(-1px);
  }
  .mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.6rem;
    cursor: pointer;
  }
  /* Sections */
  .section {
    padding: var(--space-section) 0;
  }
  .section-dark {
    background-color: var(--secondary-bg);
  }
  .section-header {
    margin-bottom: 3rem;
  }
  .section-header h2 {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
  }
  .section-header.left {
    text-align: left;
  }
  /* Hero Category */
  .cat-hero {
    position: relative;
    padding: 4rem 0 3rem;
    background: linear-gradient(160deg, rgba(6,182,212,0.08) 0%, rgba(7,7,13,0) 45%);
  }
  .cat-hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
  }
  .cat-hero-content h1 {
    font-weight: 800;
    font-size: 2.6rem;
    margin-bottom: 1.1rem;
    background: linear-gradient(to right, #FFFFFF, #A3E635);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
  .cat-hero-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 1.8rem;
  }
  .cat-hero-btns {
    display: flex;
    gap: 0.9rem;
    flex-wrap: wrap;
  }
  .btn-primary {
    background: var(--accent-1);
    border: none;
    color: #000;
    font-weight: 700;
    padding: 0.8rem 2.2rem;
    border-radius: 10px;
    font-size: 1rem;
    cursor: pointer;
    box-shadow: 0 0 22px var(--accent-1-glow);
    transition: all 0.3s;
    display: inline-block;
    text-align: center;
  }
  .btn-primary:hover {
    background: #C8F75A;
    box-shadow: 0 0 34px rgba(163,230,53,0.55);
    transform: translateY(-2px);
  }
  .btn-outline {
    background: transparent;
    border: 1px solid var(--accent-2);
    color: var(--accent-2);
    font-weight: 600;
    padding: 0.8rem 2rem;
    border-radius: 10px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-block;
    text-align: center;
  }
  .btn-outline:hover {
    background: rgba(6, 182, 212, 0.1);
    box-shadow: 0 0 18px var(--accent-2-glow);
  }
  .cat-hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
  }
  .cat-hero-visual img {
    max-width: 92%;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-glow);
    box-shadow: var(--shadow-glow);
  }
  /* Value Cards */
  .value-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-card-gap);
  }
  .value-card {
    background: var(--card-bg);
    border: 1px solid var(--border-dim);
    border-radius: var(--radius-md);
    padding: 2.2rem 1.8rem;
    transition: all 0.35s;
  }
  .value-card:hover {
    background: var(--card-bg-hover);
    border-color: var(--accent-2);
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-5px);
  }
  .value-icon {
    font-size: 2.4rem;
    color: var(--accent-1);
    margin-bottom: 1rem;
  }
  .value-card h3 {
    margin-bottom: 0.6rem;
    font-size: 1.25rem;
  }
  .value-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
  }
  /* Step Flow */
  .step-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.8rem;
  }
  .step-item {
    background: var(--card-bg);
    border: 1px solid var(--border-dim);
    border-radius: var(--radius-md);
    padding: 2rem 1.6rem;
    text-align: center;
    transition: all 0.35s;
  }
  .step-item:hover {
    border-color: var(--accent-1);
    box-shadow: 0 8px 28px rgba(163, 230, 53, 0.1);
    transform: translateY(-4px);
  }
  .step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
    color: #000;
    font-weight: 800;
    font-size: 1.2rem;
    margin-bottom: 1rem;
  }
  .step-item h4 {
    margin-bottom: 0.5rem;
  }
  .step-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
  }
  /* Stat Cards */
  .stat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }
  .stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border-dim);
    border-radius: var(--radius-md);
    padding: 2rem 1.4rem;
    text-align: center;
    transition: all 0.3s;
  }
  .stat-card:hover {
    border-color: var(--accent-2);
    background: var(--card-bg-hover);
  }
  .stat-num {
    font-size: 2.6rem;
    font-weight: 800;
    background: linear-gradient(to bottom, var(--accent-1), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.4rem;
  }
  .stat-card p {
    color: var(--text-secondary);
    font-size: 0.92rem;
  }
  /* Content List */
  .content-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.8rem;
  }
  .content-card {
    background: var(--card-bg);
    border: 1px solid var(--border-dim);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.35s;
  }
  .content-card:hover {
    border-color: var(--accent-2);
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-4px);
  }
  .content-card-img {
    height: 180px;
    overflow: hidden;
  }
  .content-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
  }
  .content-card-body {
    padding: 1.5rem;
  }
  .content-card-body h3 {
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
  }
  .content-card-body p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.5;
    margin-bottom: 0.8rem;
  }
  .content-tag {
    display: inline-block;
    background: rgba(163, 230, 53, 0.1);
    color: var(--accent-1);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.7rem;
    border-radius: 20px;
    margin-bottom: 0.6rem;
  }
  .content-card-body .content-date {
    color: var(--text-secondary);
    font-size: 0.78rem;
  }
  .content-more {
    text-align: center;
    margin-top: 2.5rem;
  }
  /* Newsletter */
  .newsletter-box {
    background: linear-gradient(135deg, rgba(6,182,212,0.08) 0%, rgba(163,230,53,0.06) 100%);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-lg);
    padding: 3.5rem 2.5rem;
    text-align: center;
  }
  .newsletter-box h2 {
    margin-bottom: 0.8rem;
  }
  .newsletter-box p {
    color: var(--text-secondary);
    margin-bottom: 1.8rem;
  }
  .newsletter-form {
    display: flex;
    gap: 0.8rem;
    max-width: 520px;
    margin: 0 auto;
    flex-wrap: wrap;
    justify-content: center;
  }
  .newsletter-form input {
    flex: 1;
    min-width: 220px;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border-dim);
    border-radius: 10px;
    padding: 0.85rem 1.25rem;
    color: white;
    font-size: 1rem;
  }
  .newsletter-form input:focus {
    outline: none;
    border-color: var(--accent-2);
    box-shadow: 0 0 0 3px rgba(6,182,212,0.18);
  }
  /* Footer */
  .site-footer {
    background: var(--secondary-bg);
    border-top: 1px solid var(--border-dim);
    padding: 3.5rem 0 1.8rem;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2.5rem;
    margin-bottom: 2.5rem;
  }
  .footer-brand {
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 0.7rem;
  }
  .footer-col p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.55;
  }
  .footer-col h4 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
  }
  .footer-col a {
    display: block;
    color: var(--text-secondary);
    font-size: 0.88rem;
    padding: 0.25rem 0;
    transition: color 0.25s;
  }
  .footer-col a:hover {
    color: var(--accent-1);
  }
  .footer-bottom {
    border-top: 1px solid var(--border-dim);
    padding-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.82rem;
  }
  /* Mobile Navigation (drawer) */
  @media (max-width: 1024px) {
    .main-nav {
      gap: 1.5rem;
    }
    .main-nav a {
      font-size: 0.9rem;
    }
  }
  @media (max-width: 768px) {
    .site-header {
      padding: 0 1.2rem;
    }
    .header-inner {
      height: 64px;
    }
    .main-nav {
      display: none;
    }
    .header-actions {
      display: none;
    }
    .mobile-menu-btn {
      display: block;
    }
    .mobile-menu-open .main-nav {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 1rem;
      position: absolute;
      top: 64px;
      left: 0;
      right: 0;
      background: rgba(7, 7, 13, 0.96);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      padding: 1.5rem 2rem;
      border-bottom: 1px solid var(--border-dim);
      z-index: 80;
    }
    .cat-hero-grid {
      grid-template-columns: 1fr;
      gap: 2.5rem;
    }
    .cat-hero-content h1 {
      font-size: 2rem;
    }
    .value-grid,
    .step-list,
    .stat-grid,
    .content-grid {
      grid-template-columns: 1fr 1fr;
    }
    .container {
      padding: 0 1.2rem;
    }
    .section {
      padding: 3.5rem 0;
    }
    .footer-grid {
      grid-template-columns: 1fr 1fr;
    }
  }
  @media (max-width: 520px) {
    .value-grid,
    .step-list,
    .stat-grid,
    .content-grid {
      grid-template-columns: 1fr;
    }
    .cat-hero-content h1 {
      font-size: 1.8rem;
    }
    .newsletter-box {
      padding: 2.2rem 1.4rem;
    }
    .footer-grid {
      grid-template-columns: 1fr;
    }
    .footer-bottom {
      flex-direction: column;
      text-align: center;
    }
  }

/* roulang page: category2 */
:root {
            --primary-bg: #07070D;
            --secondary-bg: #0E0E1E;
            --accent-1: #A3E635;
            --accent-2: #06B6D4;
            --accent-1-glow: rgba(163, 230, 53, 0.45);
            --accent-2-glow: rgba(6, 182, 212, 0.45);
            --text-primary: #FFFFFF;
            --text-secondary: #94A3B8;
            --text-highlight: #F43F5E;
            --border-dim: rgba(148, 163, 184, 0.18);
            --border-glow: rgba(6, 182, 212, 0.35);
            --card-bg: rgba(255, 255, 255, 0.03);
            --card-bg-hover: rgba(255, 255, 255, 0.06);
            --shadow-glow: 0 8px 32px rgba(6, 182, 212, 0.12);
            --shadow-card-hover: 0 12px 40px rgba(163, 230, 53, 0.15);
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --space-section: 5rem;
            --space-card-gap: 1.75rem;
            --max-width: 1280px;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            background-color: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease, background 0.25s ease;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 2rem;
        }
        .section {
            padding: var(--space-section) 0;
        }
        .section-dark {
            background-color: var(--secondary-bg);
        }
        .section-header {
            margin-bottom: 3rem;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            background: linear-gradient(to right, #FFFFFF, #A3E635);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-subtitle {
            color: var(--text-secondary);
            font-size: 1.15rem;
            line-height: 1.65;
            max-width: 680px;
        }
        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 90;
            background: rgba(7, 7, 13, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-dim);
            padding: 0 2rem;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: var(--max-width);
            margin: 0 auto;
            height: 72px;
        }
        .logo {
            font-weight: 800;
            font-size: 1.35rem;
            background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 0.35rem;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 2.25rem;
        }
        .main-nav a {
            font-weight: 500;
            color: var(--text-secondary);
            font-size: 0.95rem;
            position: relative;
            padding-bottom: 4px;
            transition: color 0.2s;
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: var(--text-primary);
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-1);
            box-shadow: 0 0 10px var(--accent-1-glow);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-2);
            color: var(--accent-2);
            padding: 0.55rem 1.35rem;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.25s;
        }
        .btn-login:hover {
            background: rgba(6, 182, 212, 0.12);
            box-shadow: 0 0 16px var(--accent-2-glow);
        }
        .btn-signup {
            background: var(--accent-1);
            border: none;
            color: var(--primary-bg);
            padding: 0.55rem 1.5rem;
            border-radius: 8px;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            box-shadow: 0 0 18px var(--accent-1-glow);
            transition: all 0.25s;
        }
        .btn-signup:hover {
            background: #C0F54A;
            box-shadow: 0 0 28px rgba(163, 230, 53, 0.6);
            transform: translateY(-1px);
        }
        .mobile-menu-btn {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            cursor: pointer;
        }
        /* Hero Category */
        .hero-category {
            position: relative;
            padding: 4rem 0 3rem;
            background: linear-gradient(160deg, rgba(6,182,212,0.06) 0%, rgba(7,7,13,0) 40%);
        }
        .hero-cat-content {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            max-width: 780px;
        }
        .hero-cat-content h1 {
            font-weight: 800;
            font-size: 2.8rem;
            background: linear-gradient(to right, #FFFFFF, #A3E635);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.25;
        }
        .hero-cat-desc {
            color: var(--text-secondary);
            font-size: 1.15rem;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: var(--accent-1);
            border: none;
            color: #000;
            font-weight: 700;
            padding: 0.9rem 2.2rem;
            border-radius: 10px;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: 0 0 22px var(--accent-1-glow);
        }
        .btn-primary:hover {
            background: #C8F75A;
            box-shadow: 0 0 34px rgba(163,230,53,0.55);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            border: 1px solid var(--accent-2);
            color: var(--accent-2);
            font-weight: 600;
            padding: 0.9rem 2.2rem;
            border-radius: 10px;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s;
        }
        .btn-outline:hover {
            background: rgba(6,182,212,0.1);
            box-shadow: 0 0 18px var(--accent-2-glow);
        }
        /* Problem-Agitation */
        .problem-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 3rem;
            align-items: center;
        }
        .problem-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 1.25rem;
        }
        .problem-list li {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            background: var(--card-bg);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            padding: 1.25rem 1.5rem;
            transition: all 0.3s;
        }
        .problem-list li:hover {
            border-color: var(--text-highlight);
            box-shadow: var(--shadow-card-hover);
        }
        .problem-icon {
            font-size: 1.5rem;
            min-width: 2rem;
            color: var(--text-highlight);
        }
        .problem-visual img {
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-glow);
            box-shadow: var(--shadow-glow);
        }
        /* Method Steps */
        .steps-vertical {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            max-width: 820px;
        }
        .step-item {
            display: flex;
            gap: 1.5rem;
            background: var(--card-bg);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            transition: all 0.3s;
            align-items: flex-start;
        }
        .step-item:hover {
            border-color: var(--accent-2);
            box-shadow: var(--shadow-card-hover);
        }
        .step-num {
            font-weight: 800;
            font-size: 2rem;
            background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            min-width: 60px;
        }
        .step-body h3 {
            font-size: 1.25rem;
            margin-bottom: 0.5rem;
        }
        .step-body p {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        /* Results Data */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .stat-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            text-align: center;
            transition: all 0.3s;
        }
        .stat-card:hover {
            border-color: var(--accent-1);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            background: linear-gradient(to bottom, var(--accent-1), var(--accent-2));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-label {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-top: 0.5rem;
        }
        /* Testimonials */
        .testimonial-scroll {
            display: flex;
            gap: 1.5rem;
            overflow-x: auto;
            padding-bottom: 1rem;
            scroll-snap-type: x mandatory;
        }
        .testimonial-card {
            min-width: 300px;
            flex-shrink: 0;
            background: var(--card-bg);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            scroll-snap-align: start;
            transition: all 0.3s;
        }
        .testimonial-card:hover {
            border-color: var(--accent-2);
            box-shadow: var(--shadow-card-hover);
        }
        .testimonial-text {
            font-style: italic;
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }
        .testimonial-author {
            font-weight: 600;
            color: var(--accent-1);
        }
        .testimonial-role {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }
        /* Audience */
        .audience-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 1.5rem;
        }
        .audience-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            text-align: left;
            transition: all 0.3s;
        }
        .audience-card:hover {
            border-color: var(--accent-1);
            box-shadow: var(--shadow-card-hover);
        }
        .audience-card h3 {
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .audience-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        /* News List */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .news-item {
            display: flex;
            gap: 1.25rem;
            background: var(--card-bg);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            padding: 1.25rem;
            transition: all 0.3s;
            align-items: center;
        }
        .news-item:hover {
            border-color: var(--accent-2);
            box-shadow: var(--shadow-card-hover);
        }
        .news-thumb {
            width: 80px;
            height: 80px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }
        .news-info h4 {
            font-size: 1.05rem;
            margin-bottom: 0.3rem;
        }
        .news-info .news-meta {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }
        .see-more {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--accent-2);
            font-weight: 600;
            padding: 0.75rem 0;
            transition: gap 0.3s;
        }
        .see-more:hover {
            gap: 0.8rem;
            color: var(--accent-1);
        }
        /* CTA Strip */
        .cta-strip {
            position: relative;
            background: linear-gradient(135deg, rgba(6,182,212,0.12), rgba(163,230,53,0.08));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 3.5rem 2.5rem;
            text-align: center;
        }
        .cta-strip h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        .cta-strip p {
            color: var(--text-secondary);
            margin-bottom: 2rem;
            font-size: 1.1rem;
        }
        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-dim);
            padding: 4rem 0 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 3rem;
        }
        .footer-brand {
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-col p {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .footer-col h4 {
            font-size: 1rem;
            margin-bottom: 1rem;
        }
        .footer-col a {
            display: block;
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 0.6rem;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: var(--accent-1);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            border-top: 1px solid var(--border-dim);
            padding-top: 1.5rem;
            color: var(--text-secondary);
            font-size: 0.85rem;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .hero-cat-content h1 { font-size: 2.2rem; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .container { padding: 0 1rem; }
            .main-nav { display: none; }
            .mobile-menu-btn { display: block; }
            .header-actions .btn-login, .header-actions .btn-signup { font-size: 0.8rem; padding: 0.45rem 1rem; }
            .hero-cat-content h1 { font-size: 1.8rem; }
            .hero-cat-desc { font-size: 1rem; }
            .problem-grid { grid-template-columns: 1fr; }
            .news-item { flex-direction: column; align-items: flex-start; }
            .news-thumb { width: 100%; height: auto; }
            .section-header h2 { font-size: 1.6rem; }
        }
        @media (max-width: 520px) {
            .stats-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; }
        }

/* roulang page: category3 */
:root {
  --primary-bg: #07070D;
  --secondary-bg: #0E0E1E;
  --accent-1: #A3E635;
  --accent-2: #06B6D4;
  --accent-1-glow: rgba(163, 230, 53, 0.45);
  --accent-2-glow: rgba(6, 182, 212, 0.45);
  --text-primary: #FFFFFF;
  --text-secondary: #94A3B8;
  --text-highlight: #F43F5E;
  --border-dim: rgba(148, 163, 184, 0.18);
  --border-glow: rgba(6, 182, 212, 0.35);
  --card-bg: rgba(255, 255, 255, 0.03);
  --card-bg-hover: rgba(255, 255, 255, 0.06);
  --shadow-glow: 0 8px 32px rgba(6, 182, 212, 0.12);
  --shadow-card-hover: 0 12px 40px rgba(163, 230, 53, 0.15);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --space-section: 5rem;
  --space-card-gap: 1.75rem;
  --max-width: 1280px;
}
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background-color: var(--primary-bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  text-decoration: none;
  color: inherit;
  transition: color 0.25s ease, background 0.25s ease;
}
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}
/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(7, 7, 13, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-dim);
  padding: 0 2rem;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  height: 72px;
}
.logo {
  font-weight: 800;
  font-size: 1.35rem;
  background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}
.main-nav a {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.95rem;
  position: relative;
  padding-bottom: 4px;
  transition: color 0.2s;
}
.main-nav a:hover,
.main-nav a.active {
  color: var(--text-primary);
}
.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-1);
  box-shadow: 0 0 10px var(--accent-1-glow);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.btn-login {
  background: transparent;
  border: 1px solid var(--accent-2);
  color: var(--accent-2);
  padding: 0.55rem 1.35rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.25s;
  white-space: nowrap;
}
.btn-login:hover {
  background: rgba(6, 182, 212, 0.12);
  box-shadow: 0 0 16px var(--accent-2-glow);
}
.btn-signup {
  background: var(--accent-1);
  border: none;
  color: var(--primary-bg);
  padding: 0.55rem 1.5rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  box-shadow: 0 0 18px var(--accent-1-glow);
  transition: all 0.25s;
  white-space: nowrap;
}
.btn-signup:hover {
  background: #C0F54A;
  box-shadow: 0 0 28px rgba(163, 230, 53, 0.6);
  transform: translateY(-1px);
}
.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.6rem;
  cursor: pointer;
}
/* Sections */
.section {
  padding: var(--space-section) 0;
}
.section-dark {
  background-color: var(--secondary-bg);
}
.section-light {
  background-color: var(--primary-bg);
}
.section-header {
  margin-bottom: 3rem;
}
.section-header h2 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-primary);
}
.section-header.left {
  text-align: left;
}
.section-header.center {
  text-align: center;
}
.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.15rem;
  line-height: 1.65;
  max-width: 680px;
}
.section-header.center .section-subtitle {
  margin: 0 auto;
}
/* Category Hero */
.cat-hero {
  padding: 4rem 0 3rem;
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, rgba(6,182,212,0.08) 0%, rgba(7,7,13,0) 50%);
  border-bottom: 1px solid var(--border-dim);
}
.cat-hero-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: 860px;
}
.cat-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(163, 230, 53, 0.12);
  border: 1px solid rgba(163, 230, 53, 0.3);
  color: var(--accent-1);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.45rem 1.1rem;
  border-radius: 999px;
  width: fit-content;
  letter-spacing: 0.02em;
}
.cat-hero h1 {
  font-weight: 900;
  font-size: 3rem;
  line-height: 1.2;
  background: linear-gradient(to right, #FFFFFF, #A3E635);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cat-hero-desc {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 620px;
}
.cat-hero-stats {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
}
.stat-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.stat-number {
  font-weight: 800;
  font-size: 2rem;
  color: var(--accent-1);
  line-height: 1;
}
.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}
/* Content grid */
.content-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.content-text h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}
.content-text p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}
.content-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-glow);
  box-shadow: var(--shadow-glow);
}
.content-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
}
/* Feature List */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin: 1.5rem 0;
}
.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1rem 1.25rem;
  background: var(--card-bg);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  transition: border-color 0.3s;
}
.feature-item:hover {
  border-color: var(--accent-2);
}
.feature-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(6,182,212,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-2);
  font-size: 1.1rem;
}
.feature-info h4 {
  font-weight: 600;
  margin-bottom: 0.2rem;
  color: var(--text-primary);
  font-size: 1rem;
}
.feature-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.55;
}
/* Scenario Cards */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: var(--space-card-gap);
}
.scenario-card {
  background: var(--card-bg);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: all 0.3s;
}
.scenario-card:hover {
  background: var(--card-bg-hover);
  border-color: var(--accent-2);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}
.scenario-card .sc-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(163,230,53,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  color: var(--accent-1);
}
.scenario-card h3 {
  font-weight: 700;
  margin-bottom: 0.6rem;
  font-size: 1.15rem;
}
.scenario-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}
/* Process Steps */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 1.5rem;
  counter-reset: step;
}
.step-card {
  background: var(--card-bg);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  position: relative;
  transition: border-color 0.3s;
  counter-increment: step;
}
.step-card:hover {
  border-color: var(--accent-2);
}
.step-card::before {
  content: counter(step);
  position: absolute;
  top: -12px;
  right: 18px;
  background: var(--accent-1);
  color: var(--primary-bg);
  font-weight: 800;
  font-size: 0.85rem;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step-card h4 {
  font-weight: 700;
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
}
.step-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}
/* CTA Ribbon */
.cta-ribbon {
  background: linear-gradient(135deg, rgba(6,182,212,0.1) 0%, rgba(163,230,53,0.08) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  text-align: left;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
.cta-ribbon-text h3 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}
.cta-ribbon-text p {
  color: var(--text-secondary);
  font-size: 1rem;
}
.btn-primary-lg {
  background: var(--accent-1);
  border: none;
  color: var(--primary-bg);
  font-weight: 700;
  padding: 0.9rem 2.2rem;
  border-radius: 10px;
  font-size: 1.05rem;
  cursor: pointer;
  box-shadow: 0 0 22px var(--accent-1-glow);
  transition: all 0.3s;
  white-space: nowrap;
}
.btn-primary-lg:hover {
  background: #C0F54A;
  box-shadow: 0 0 34px rgba(163,230,53,0.55);
  transform: translateY(-2px);
}
/* FAQ */
.faq-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 800px;
}
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.5rem;
  transition: border-color 0.3s;
}
.faq-item:hover {
  border-color: var(--accent-2);
}
.faq-item h4 {
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
  font-size: 1.05rem;
}
.faq-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}
/* Posts List Minimal */
.posts-mini-list {
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 1.25rem;
}
.post-mini-item {
  display: flex;
  gap: 1rem;
  background: var(--card-bg);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 1rem;
  transition: all 0.3s;
  align-items: center;
}
.post-mini-item:hover {
  border-color: var(--accent-2);
  box-shadow: var(--shadow-card-hover);
}
.post-mini-thumb {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--secondary-bg);
}
.post-mini-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.post-mini-info h4 {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.3rem;
  line-height: 1.4;
}
.post-mini-info .post-meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
}
/* Footer */
.site-footer {
  background: var(--secondary-bg);
  border-top: 1px solid var(--border-dim);
  padding: 3.5rem 0 2rem;
  margin-top: 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}
.footer-col .footer-brand {
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-col p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}
.footer-col h4 {
  font-weight: 600;
  margin-bottom: 1rem;
  font-size: 1rem;
}
.footer-col a {
  display: block;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0.55rem;
  transition: color 0.2s;
}
.footer-col a:hover {
  color: var(--accent-1);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border-dim);
  font-size: 0.85rem;
  color: var(--text-secondary);
}
/* Responsive */
@media (max-width: 1024px) {
  .content-grid-2,
  .process-steps,
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .cat-hero h1 { font-size: 2.4rem; }
}
@media (max-width: 768px) {
  .container { padding: 0 1.25rem; }
  .header-inner { height: 64px; }
  .main-nav { display: none; }
  .mobile-menu-btn { display: block; }
  .header-actions .btn-login,
  .header-actions .btn-signup {
    padding: 0.45rem 1rem;
    font-size: 0.82rem;
  }
  .cat-hero h1 { font-size: 2rem; }
  .cat-hero-stats { gap: 1.5rem; }
  .content-grid-2,
  .scenario-grid,
  .process-steps {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .section { padding: 3rem 0; }
  .section-header h2 { font-size: 1.7rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 1.75rem; }
  .cta-ribbon { flex-direction: column; text-align: left; align-items: flex-start; }
  .posts-mini-list { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
  .cat-hero h1 { font-size: 1.7rem; }
  .header-actions { gap: 0.5rem; }
}

/* roulang page: category4 */
:root {
      --primary-bg: #07070D;
      --secondary-bg: #0E0E1E;
      --accent-1: #A3E635;
      --accent-2: #06B6D4;
      --accent-1-glow: rgba(163, 230, 53, 0.45);
      --accent-2-glow: rgba(6, 182, 212, 0.45);
      --text-primary: #FFFFFF;
      --text-secondary: #94A3B8;
      --text-highlight: #F43F5E;
      --border-dim: rgba(148, 163, 184, 0.18);
      --border-glow: rgba(6, 182, 212, 0.35);
      --card-bg: rgba(255, 255, 255, 0.03);
      --card-bg-hover: rgba(255, 255, 255, 0.06);
      --shadow-glow: 0 8px 32px rgba(6, 182, 212, 0.12);
      --shadow-card-hover: 0 12px 40px rgba(163, 230, 53, 0.15);
      --radius-lg: 20px;
      --radius-md: 14px;
      --radius-sm: 8px;
      --space-section: 5rem;
      --space-card-gap: 1.75rem;
      --max-width: 1280px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
      background-color: var(--primary-bg);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.25s ease, background 0.25s ease;
    }
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 2rem;
    }
    .section-subtitle {
      color: var(--text-secondary);
      font-size: 1.15rem;
      line-height: 1.65;
      max-width: 680px;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 90;
      background: rgba(7, 7, 13, 0.82);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--border-dim);
      padding: 0 2rem;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: var(--max-width);
      margin: 0 auto;
      height: 72px;
    }
    .logo {
      font-weight: 800;
      font-size: 1.35rem;
      background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: -0.01em;
      display: flex;
      align-items: center;
      gap: 0.35rem;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 2.25rem;
    }
    .main-nav a {
      font-weight: 500;
      color: var(--text-secondary);
      font-size: 0.95rem;
      position: relative;
      padding-bottom: 4px;
      transition: color 0.2s;
    }
    .main-nav a:hover,
    .main-nav a.active {
      color: var(--text-primary);
    }
    .main-nav a.active::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent-1);
      box-shadow: 0 0 10px var(--accent-1-glow);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 1rem;
    }
    .btn-login {
      background: transparent;
      border: 1px solid var(--accent-2);
      color: var(--accent-2);
      padding: 0.55rem 1.35rem;
      border-radius: 8px;
      font-weight: 600;
      font-size: 0.9rem;
      cursor: pointer;
      transition: all 0.25s;
    }
    .btn-login:hover {
      background: rgba(6, 182, 212, 0.12);
      box-shadow: 0 0 16px var(--accent-2-glow);
    }
    .btn-signup {
      background: var(--accent-1);
      border: none;
      color: var(--primary-bg);
      padding: 0.55rem 1.5rem;
      border-radius: 8px;
      font-weight: 700;
      font-size: 0.9rem;
      cursor: pointer;
      box-shadow: 0 0 18px var(--accent-1-glow);
      transition: all 0.25s;
    }
    .btn-signup:hover {
      background: #C0F54A;
      box-shadow: 0 0 28px rgba(163, 230, 53, 0.6);
      transform: translateY(-1px);
    }
    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: none;
      color: var(--text-primary);
      font-size: 1.6rem;
      cursor: pointer;
    }
    .section {
      padding: var(--space-section) 0;
    }
    .section-dark {
      background-color: var(--secondary-bg);
    }
    .section-header {
      margin-bottom: 3rem;
    }
    .section-header h2 {
      margin-bottom: 0.75rem;
      display: flex;
      align-items: center;
      gap: 0.6rem;
      font-size: 2.25rem;
      background: linear-gradient(to right, #FFFFFF, #A3E635);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .section-header.left {
      text-align: left;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--space-card-gap);
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: var(--space-card-gap);
    }
    .card {
      background: var(--card-bg);
      border: 1px solid var(--border-dim);
      border-radius: var(--radius-md);
      padding: 2rem;
      transition: all 0.3s;
      text-align: left;
    }
    .card:hover {
      background: var(--card-bg-hover);
      border-color: var(--accent-2);
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
    }
    .card h3 {
      margin-bottom: 0.75rem;
      font-size: 1.25rem;
      color: var(--text-primary);
    }
    .card p {
      color: var(--text-secondary);
      font-size: 0.95rem;
      line-height: 1.6;
    }
    .btn-accent {
      display: inline-block;
      background: var(--accent-1);
      border: none;
      color: #000;
      font-weight: 700;
      padding: 0.85rem 2rem;
      border-radius: 10px;
      font-size: 1rem;
      cursor: pointer;
      transition: all 0.3s;
      box-shadow: 0 0 22px var(--accent-1-glow);
      text-align: center;
      text-decoration: none;
    }
    .btn-accent:hover {
      background: #C8F75A;
      box-shadow: 0 0 34px rgba(163,230,53,0.55);
      transform: translateY(-2px);
      color: #000;
    }
    .section-cta {
      background: linear-gradient(135deg, rgba(6,182,212,0.08), rgba(163,230,53,0.05));
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      padding: 3.5rem 2rem;
      text-align: center;
    }
    .section-cta h2 {
      margin-bottom: 1.25rem;
    }
    .section-cta p {
      color: var(--text-secondary);
      max-width: 600px;
      margin: 0 auto 2rem;
      font-size: 1.15rem;
    }
    .article-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--space-card-gap);
    }
    .article-card {
      background: var(--card-bg);
      border: 1px solid var(--border-dim);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.3s;
      display: flex;
      flex-direction: column;
    }
    .article-card:hover {
      border-color: var(--accent-2);
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
    }
    .article-card img {
      width: 100%;
      height: 160px;
      object-fit: cover;
    }
    .article-card-body {
      padding: 1.25rem;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .article-card-body h3 {
      font-size: 1.1rem;
      margin-bottom: 0.5rem;
      color: var(--text-primary);
    }
    .article-card-body p {
      font-size: 0.85rem;
      color: var(--text-secondary);
      flex: 1;
    }
    .article-card-body time {
      font-size: 0.75rem;
      color: var(--text-secondary);
      margin-top: 0.75rem;
      display: block;
    }
    .hero-recruit {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
      min-height: 70vh;
    }
    .hero-recruit-content h1 {
      font-weight: 800;
      font-size: 2.8rem;
      margin-bottom: 1.25rem;
      background: linear-gradient(to right, #FFFFFF, #A3E635);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-recruit-content p {
      color: var(--text-secondary);
      font-size: 1.15rem;
      line-height: 1.7;
      margin-bottom: 1.75rem;
    }
    .hero-recruit-visual {
      display: flex;
      justify-content: center;
    }
    .hero-recruit-visual img {
      max-width: 85%;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-glow);
      box-shadow: var(--shadow-glow);
    }
    .hot-tag {
      display: inline-block;
      background: rgba(244,63,94,0.15);
      color: var(--text-highlight);
      font-weight: 700;
      font-size: 0.75rem;
      padding: 0.2rem 0.75rem;
      border-radius: 20px;
      border: 1px solid rgba(244,63,94,0.35);
      margin-bottom: 1rem;
      letter-spacing: 0.02em;
      text-transform: uppercase;
    }
    .xiengrid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.25rem;
    }
    .xien-card {
      background: var(--card-bg);
      border: 1px solid var(--border-dim);
      border-radius: var(--radius-md);
      padding: 1.25rem 1rem;
      text-align: center;
      transition: all 0.3s;
    }
    .xien-card:hover {
      border-color: var(--accent-1);
      box-shadow: 0 0 18px var(--accent-1-glow);
      transform: scale(1.03);
    }
    .xien-card .number {
      font-size: 2.2rem;
      font-weight: 800;
      background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .xien-card .label {
      color: var(--text-secondary);
      font-size: 0.85rem;
      margin-top: 0.35rem;
    }
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: var(--space-card-gap);
    }
    .step-item {
      text-align: left;
      padding: 1.5rem;
      background: var(--card-bg);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-dim);
    }
    .step-num {
      font-size: 2.5rem;
      font-weight: 800;
      background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1;
      margin-bottom: 0.75rem;
    }
    .site-footer {
      background: var(--secondary-bg);
      padding: 3.5rem 0 2rem;
      border-top: 1px solid var(--border-dim);
      margin-top: 2rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2.5rem;
    }
    .footer-brand {
      font-weight: 800;
      font-size: 1.25rem;
      color: var(--accent-1);
      margin-bottom: 0.75rem;
    }
    .footer-col h4 {
      margin-bottom: 1rem;
      color: var(--text-primary);
      font-size: 1rem;
    }
    .footer-col a {
      display: block;
      color: var(--text-secondary);
      font-size: 0.9rem;
      margin-bottom: 0.5rem;
      transition: color 0.2s;
    }
    .footer-col a:hover {
      color: var(--accent-1);
    }
    .footer-col p {
      color: var(--text-secondary);
      font-size: 0.9rem;
    }
    .footer-bottom {
      margin-top: 2.5rem;
      padding-top: 1.5rem;
      border-top: 1px solid var(--border-dim);
      display: flex;
      justify-content: space-between;
      color: var(--text-secondary);
      font-size: 0.85rem;
    }
    @media (max-width: 1024px) {
      .grid-3, .article-list { grid-template-columns: repeat(2, 1fr); }
      .xiengrid { grid-template-columns: repeat(2, 1fr); }
      .steps-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .hero-recruit { grid-template-columns: 1fr; min-height: auto; }
      .hero-recruit-visual img { max-width: 70%; margin: 0 auto; }
      h1 { font-size: 2.4rem; }
    }
    @media (max-width: 768px) {
      .grid-3, .grid-2, .article-list { grid-template-columns: 1fr; }
      .xiengrid { grid-template-columns: 1fr 1fr; }
      .steps-grid { grid-template-columns: 1fr; }
      .site-header { padding: 0 1rem; }
      .main-nav { display: none; }
      .mobile-menu-btn { display: block; }
      .section { padding: 3rem 0; }
      .section-header h2 { font-size: 1.8rem; }
      .hero-recruit-content h1 { font-size: 2rem; }
      .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
    }
    @media (max-width: 520px) {
      .container { padding: 0 1.25rem; }
      .header-actions .btn-login, .header-actions .btn-signup { padding: 0.45rem 1rem; font-size: 0.8rem; }
      .xiengrid { grid-template-columns: 1fr 1fr; }
    }