/* roulang page: index */
:root {
      --primary-gradient: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #0072ff 100%);
      --accent-color: #ff6b35;
      --accent-hover: #e85a24;
      --bg-light: #f4f7fb;
      --bg-white: #ffffff;
      --text-dark: #1a2530;
      --text-muted: #5e6e82;
      --border-color: #e2e8f0;
      --card-radius: 16px;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.05);
      --shadow-lg: 0 12px 32px rgba(30,60,114,0.12);
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      color: var(--text-dark);
      background-color: var(--bg-light);
      line-height: 1.65;
    }
    a {
      color: #2a5298;
      text-decoration: none;
      transition: all 0.25s ease;
    }
    a:hover {
      color: var(--accent-color);
    }
    .site-header {
      background: var(--bg-white);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1000;
      box-shadow: var(--shadow-sm);
    }
    .top-bar {
      background: transparent;
      padding: 0.75rem 0;
    }
    .brand-logo {
      font-size: 1.35rem;
      font-weight: 800;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .brand-logo i {
      -webkit-text-fill-color: #0072ff;
    }
    .nav-links {
      display: flex;
      gap: 1.5rem;
      margin: 0;
      list-style: none;
      align-items: center;
    }
    .nav-links a {
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--text-dark);
      padding: 0.5rem 0.75rem;
      border-radius: 8px;
    }
    .nav-links a.active, .nav-links a:hover {
      background: rgba(0, 114, 255, 0.08);
      color: #0072ff;
    }
    .hero-banner {
      background: var(--primary-gradient);
      color: #ffffff;
      padding: 4.5rem 0 3.5rem;
      position: relative;
      overflow: hidden;
    }
    .hero-title {
      font-size: 2.3rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 1.25rem;
      color: #ffffff;
    }
    .hero-lead {
      font-size: 1.05rem;
      line-height: 1.8;
      opacity: 0.92;
      margin-bottom: 2rem;
      max-width: 860px;
    }
    .roadmap-bar {
      background: rgba(255,255,255,0.12);
      border: 1px solid rgba(255,255,255,0.25);
      border-radius: var(--card-radius);
      padding: 1.25rem;
      backdrop-filter: blur(10px);
      margin-bottom: 2rem;
    }
    .roadmap-node {
      text-align: center;
      position: relative;
    }
    .roadmap-node .badge {
      background: var(--accent-color);
      color: #fff;
      font-size: 0.8rem;
      padding: 0.35rem 0.75rem;
      border-radius: 20px;
      margin-bottom: 0.5rem;
      display: inline-block;
    }
    .subscribe-box {
      display: flex;
      gap: 0.75rem;
      max-width: 520px;
    }
    .subscribe-box input {
      border-radius: 8px;
      border: none;
      padding: 0.75rem 1rem;
      margin: 0;
      height: auto;
    }
    .btn-custom {
      background: var(--accent-color);
      color: #ffffff;
      font-weight: 700;
      border-radius: 8px;
      padding: 0.75rem 1.5rem;
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      transition: background 0.2s;
    }
    .btn-custom:hover {
      background: var(--accent-hover);
      color: #fff;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid #ffffff;
      color: #ffffff;
      font-weight: 600;
      border-radius: 8px;
      padding: 0.65rem 1.25rem;
      transition: all 0.2s;
    }
    .btn-outline:hover {
      background: #ffffff;
      color: #1e3c72;
    }
    .main-section {
      padding: 4rem 0;
    }
    .main-section.bg-alt {
      background: var(--bg-white);
    }
    .section-head {
      margin-bottom: 2.5rem;
      text-align: center;
    }
    .section-head h2 {
      font-size: 1.85rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 0.75rem;
    }
    .section-head p {
      font-size: 0.95rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto;
    }
    .custom-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 1.75rem;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s;
      height: 100%;
    }
    .custom-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .card-icon {
      font-size: 2rem;
      color: #0072ff;
      margin-bottom: 1rem;
    }
    .data-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      background: rgba(0, 114, 255, 0.1);
      color: #0072ff;
      padding: 0.25rem 0.65rem;
      border-radius: 6px;
      font-size: 0.8rem;
      font-weight: 600;
      margin-bottom: 0.75rem;
    }
    .download-stage {
      background: linear-gradient(180deg, #ffffff 0%, #edf2f7 100%);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 2.5rem;
      text-align: center;
      margin-top: 2rem;
    }
    .check-list {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .check-list li {
      padding: 0.75rem 0;
      border-bottom: 1px dashed var(--border-color);
      display: flex;
      align-items: flex-start;
      gap: 0.75rem;
      font-size: 0.95rem;
    }
    .check-list li i {
      color: #28a745;
      margin-top: 0.25rem;
    }
    .badge-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 1.25rem;
    }
    .badge-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 1.25rem;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }
    .testimonial-card {
      background: var(--bg-white);
      border-radius: var(--card-radius);
      border: 1px solid var(--border-color);
      padding: 1.5rem;
      position: relative;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      margin-top: 1rem;
    }
    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #2a5298;
    }
    .faq-accordion-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      margin-bottom: 1rem;
      padding: 1.25rem;
    }
    .faq-q {
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--text-dark);
      display: flex;
      align-items: center;
      gap: 0.5rem;
      margin-bottom: 0.5rem;
    }
    .faq-a {
      font-size: 0.92rem;
      color: var(--text-muted);
      margin: 0;
      line-height: 1.6;
    }
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 3.5rem 0 2rem;
      border-top: 1px solid #1e293b;
    }
    .site-footer h4 {
      color: #f8fafc;
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
    }
    .site-footer ul {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .site-footer li {
      margin-bottom: 0.6rem;
    }
    .site-footer a {
      color: #94a3b8;
    }
    .site-footer a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      margin-top: 2.5rem;
      padding-top: 1.5rem;
      border-top: 1px solid #1e293b;
      font-size: 0.85rem;
      text-align: center;
    }
    @media (max-width: 768px) {
      .hero-title {
        font-size: 1.75rem;
      }
      .subscribe-box {
        flex-direction: column;
      }
      .roadmap-node {
        margin-bottom: 1rem;
      }
    }

/* roulang page: category1 */
:root {
  --primary-gradient: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #0072ff 100%);
  --accent-color: #ff6b35;
  --accent-hover: #e85a24;
  --bg-light: #f4f7fb;
  --bg-white: #ffffff;
  --text-dark: #1a2530;
  --text-muted: #5e6e82;
  --border-color: #e2e8f0;
  --card-radius: 16px;
  --shadow-sm: 0 4px 12px rgba(0,0,0,0.05);
  --shadow-lg: 0 12px 32px rgba(30,60,114,0.12);
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-dark);
  background-color: var(--bg-light);
  line-height: 1.65;
  margin: 0;
  padding: 0;
}
a {
  color: #2a5298;
  text-decoration: none;
  transition: all 0.25s ease;
}
a:hover {
  color: var(--accent-color);
}
.site-header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}
.brand-logo {
  font-size: 1.35rem;
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.brand-logo i {
  -webkit-text-fill-color: #0072ff;
}
.nav-links {
  display: flex;
  gap: 1.5rem;
  margin: 0;
  list-style: none;
  align-items: center;
}
.nav-links a {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-dark);
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
}
.nav-links a.active, .nav-links a:hover {
  background: rgba(0, 114, 255, 0.08);
  color: #0072ff;
}
.hero-banner {
  background: var(--primary-gradient);
  color: #ffffff;
  padding: 4.5rem 0 3.5rem;
  position: relative;
  overflow: hidden;
}
.hero-title {
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 1.25rem;
  color: #ffffff;
}
.hero-lead {
  font-size: 1.05rem;
  line-height: 1.8;
  opacity: 0.92;
  margin-bottom: 2rem;
  max-width: 860px;
}
.btn-custom {
  background: var(--accent-color);
  color: #ffffff;
  font-weight: 700;
  border-radius: 8px;
  padding: 0.75rem 1.5rem;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: background 0.2s;
}
.btn-custom:hover {
  background: var(--accent-hover);
  color: #fff;
}
.btn-outline {
  background: transparent;
  border: 2px solid #ffffff;
  color: #ffffff;
  font-weight: 600;
  border-radius: 8px;
  padding: 0.65rem 1.25rem;
  transition: all 0.2s;
}
.btn-outline:hover {
  background: #ffffff;
  color: #1e3c72;
}
.main-section {
  padding: 4rem 0;
}
.main-section.bg-alt {
  background: var(--bg-white);
}
.section-head {
  margin-bottom: 2.5rem;
  text-align: center;
}
.section-head h2 {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 0.75rem;
}
.section-head p {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto;
}
.custom-card {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s, box-shadow 0.25s;
  height: 100%;
}
.custom-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.card-icon {
  font-size: 2rem;
  color: #0072ff;
  margin-bottom: 1rem;
}
.data-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(0, 114, 255, 0.1);
  color: #0072ff;
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}
.badge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}
.badge-item {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.badge-item .num {
  font-size: 1.85rem;
  font-weight: 800;
  color: #0072ff;
  display: block;
}
.badge-item .lbl {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}
.topic-tag {
  background: #f1f5f9;
  border-radius: 20px;
  padding: 0.25rem 0.85rem;
  font-size: 0.8rem;
  color: #475569;
  display: inline-block;
  margin: 0.2rem;
}
.matrix-table-wrap {
  background: var(--bg-white);
  border-radius: var(--card-radius);
  border: 1px solid var(--border-color);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.table-styled {
  width: 100%;
  margin-bottom: 0;
  border-collapse: collapse;
}
.table-styled th {
  background: #f8fafc;
  color: var(--text-dark);
  font-weight: 700;
  padding: 1rem;
  border-bottom: 2px solid var(--border-color);
}
.table-styled td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  color: #334155;
  font-size: 0.92rem;
}
.table-styled tr:hover td {
  background: #f8fafc;
}
.step-bar {
  display: flex;
  justify-content: space-between;
  position: relative;
  margin-top: 2rem;
}
.step-item {
  text-align: center;
  position: relative;
  flex: 1;
  padding: 0 1rem;
}
.step-number {
  width: 44px;
  height: 44px;
  line-height: 44px;
  background: #0072ff;
  color: #ffffff;
  border-radius: 50%;
  margin: 0 auto 1rem;
  font-weight: 700;
}
.step-title {
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: var(--text-dark);
}
.step-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 3.5rem 0 2rem;
  border-top: 1px solid #1e293b;
}
.site-footer h4 {
  color: #f8fafc;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}
.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-footer li {
  margin-bottom: 0.6rem;
}
.site-footer a {
  color: #94a3b8;
}
.site-footer a:hover {
  color: #38bdf8;
}
.footer-bottom {
  border-top: 1px solid #1e293b;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
}
@media (max-width: 768px) {
  .hero-title { font-size: 1.75rem; }
  .step-bar { flex-direction: column; gap: 1.5rem; }
  .nav-links { gap: 0.75rem; }
}