/* roulang page: index */
:root {
      --primary: #1e1145;
      --primary-dark: #160d33;
      --primary-light: #32255c;
      --accent: #00d4e6;
      --cta: #ff2d78;
      --bg: #0f0b1e;
      --bg-light: #140f24;
      --bg-lighter: #1a1330;
      --card: #241a3d;
      --border: #322752;
      --text: #f2edf7;
      --text-secondary: #a89bbd;
      --text-muted: #7c6f99;
      --success: #00e6a0;
      --warning: #ffc233;
      --danger: #ff5c7a;
      --radius-card: 16px;
      --radius-btn: 12px;
      --radius-input: 10px;
      --radius-chip: 999px;
      --shadow-card: 0 6px 22px rgba(0, 0, 0, 0.35);
      --shadow-hover: 0 12px 32px rgba(0, 212, 230, 0.16);
      --transition: all 0.25s ease;
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      font-family: var(--font-stack);
      background: var(--bg);
      color: var(--text);
      line-height: 1.75;
      font-size: 16px;
      min-height: 100vh;
    }

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

    a:hover {
      color: #4de8f5;
      text-decoration: underline;
    }

    a:focus,
    button:focus,
    input:focus,
    select:focus,
    textarea:focus {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }

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

    h1, h2, h3, h4, h5, h6 {
      color: var(--text);
      font-weight: 700;
      line-height: 1.35;
      margin-bottom: 0.75rem;
    }

    h1 {
      font-size: clamp(1.8rem, 4vw, 2.75rem);
      font-weight: 800;
      letter-spacing: -0.02em;
    }

    h2 {
      font-size: clamp(1.5rem, 3vw, 2rem);
      font-weight: 700;
      letter-spacing: -0.01em;
    }

    h3 {
      font-size: clamp(1.1rem, 2vw, 1.35rem);
      font-weight: 600;
    }

    p {
      color: var(--text);
      margin-bottom: 1rem;
    }

    .container-custom {
      max-width: 1240px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    .container-wide {
      max-width: 1240px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* ========== HEADER & NAV ========== */
    .site-header {
      background: var(--primary-dark);
      border-bottom: 1px solid var(--border);
      position: sticky;
      top: 0;
      z-index: 1030;
      box-shadow: 0 2px 12px rgba(0, 0, 0, 0.45);
    }

    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
      gap: 16px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text);
      white-space: nowrap;
    }

    .brand-logo:hover {
      color: var(--accent);
      text-decoration: none;
    }

    .brand-logo .logo-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: var(--primary-light);
      border: 1px solid var(--border);
      color: var(--accent);
      font-size: 1.1rem;
      flex-shrink: 0;
    }

    .brand-suffix {
      font-size: 0.75rem;
      font-weight: 400;
      color: var(--text-secondary);
      letter-spacing: 0.05em;
      margin-left: 2px;
    }

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

    .main-nav-desktop .nav-link-item {
      display: inline-flex;
      align-items: center;
      padding: 8px 14px;
      border-radius: 10px;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-secondary);
      transition: var(--transition);
      white-space: nowrap;
    }

    .main-nav-desktop .nav-link-item:hover {
      color: var(--accent);
      text-decoration: none;
      background: rgba(0, 212, 230, 0.08);
    }

    .main-nav-desktop .nav-link-item.active {
      color: var(--accent);
      background: rgba(0, 212, 230, 0.12);
    }

    .navbar-toggler-custom {
      display: none;
      background: transparent;
      border: 1px solid var(--border);
      border-radius: 10px;
      padding: 8px 12px;
      color: var(--text);
      cursor: pointer;
      font-size: 1.4rem;
      line-height: 1;
      transition: var(--transition);
    }

    .navbar-toggler-custom:hover {
      border-color: var(--accent);
      color: var(--accent);
    }

    .mobile-menu {
      display: none;
      background: var(--primary-dark);
      border-top: 1px solid var(--border);
      padding: 12px 0;
      flex-direction: column;
      gap: 4px;
    }

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

    .mobile-menu .nav-link-item {
      display: block;
      padding: 12px 16px;
      border-radius: 8px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-secondary);
      transition: var(--transition);
    }

    .mobile-menu .nav-link-item:hover,
    .mobile-menu .nav-link-item.active {
      color: var(--accent);
      background: rgba(0, 212, 230, 0.08);
      text-decoration: none;
    }

    /* ========== CHIP NAV ========== */
    .chip-nav {
      background: var(--bg-light);
      border-bottom: 1px solid var(--border);
      padding: 8px 0;
      position: sticky;
      top: 64px;
      z-index: 1020;
    }

    .chip-container {
      display: flex;
      gap: 8px;
      overflow-x: auto;
      scrollbar-width: thin;
      -webkit-overflow-scrolling: touch;
      padding: 2px 4px;
    }

    .chip-container::-webkit-scrollbar {
      height: 4px;
    }

    .chip-container::-webkit-scrollbar-track {
      background: transparent;
    }

    .chip-container::-webkit-scrollbar-thumb {
      background: var(--border);
      border-radius: 999px;
    }

    .chip-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 8px 16px;
      border-radius: var(--radius-chip);
      border: 1px solid var(--border);
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--text-secondary);
      white-space: nowrap;
      background: var(--bg-light);
      transition: var(--transition);
      flex-shrink: 0;
    }

    .chip-link:hover {
      color: var(--accent);
      border-color: var(--accent);
      background: rgba(0, 212, 230, 0.06);
      text-decoration: none;
    }

    .chip-link.active {
      color: var(--accent);
      border-color: var(--accent);
      background: rgba(0, 212, 230, 0.1);
      font-weight: 600;
    }

    /* ========== HERO ========== */
    .hero-section {
      background: radial-gradient(ellipse at 30% 20%, rgba(30, 17, 69, 0.9) 0%, var(--bg) 75%);
      padding: 64px 0 48px;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border);
    }

    .hero-section::before {
      content: "";
      position: absolute;
      top: -40%;
      right: -10%;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(0, 212, 230, 0.06) 0%, transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }

    .hero-section::after {
      content: "";
      position: absolute;
      bottom: -30%;
      left: -5%;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(255, 45, 120, 0.05) 0%, transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 48px;
      align-items: center;
      position: relative;
      z-index: 1;
    }

    .hero-content h1 {
      margin-bottom: 1rem;
      color: var(--text);
      line-height: 1.25;
    }

    .hero-content .hero-highlight {
      color: var(--accent);
    }

    .hero-subtitle {
      font-size: 1.05rem;
      color: var(--text-secondary);
      max-width: 520px;
      margin-bottom: 1.75rem;
      line-height: 1.8;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 2rem;
    }

    .btn-primary-custom {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--cta);
      color: #fff;
      border: none;
      padding: 12px 24px;
      border-radius: var(--radius-btn);
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      text-decoration: none;
      white-space: nowrap;
    }

    .btn-primary-custom:hover {
      background: #ff4d94;
      color: #fff;
      text-decoration: none;
      transform: scale(1.02);
      box-shadow: 0 6px 20px rgba(255, 45, 120, 0.35);
    }

    .btn-primary-custom:active {
      transform: scale(0.98);
    }

    .btn-outline-accent {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: transparent;
      color: var(--accent);
      border: 1px solid var(--accent);
      padding: 12px 24px;
      border-radius: var(--radius-btn);
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      text-decoration: none;
      white-space: nowrap;
    }

    .btn-outline-accent:hover {
      background: rgba(0, 212, 230, 0.1);
      color: var(--accent);
      text-decoration: none;
      transform: scale(1.02);
    }

    .btn-outline-accent:active {
      transform: scale(0.98);
    }

    .hero-data-capsules {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .data-capsule {
      display: flex;
      flex-direction: column;
      gap: 2px;
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 10px 16px;
      min-width: 100px;
      transition: var(--transition);
    }

    .data-capsule:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-hover);
    }

    .data-capsule .capsule-value {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--accent);
      line-height: 1.2;
    }

    .data-capsule .capsule-label {
      font-size: 0.75rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    .hero-featured-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }

    .hero-featured-card:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    .hero-featured-card .hero-card-img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }

    .hero-card-body {
      padding: 20px 22px;
    }

    .hero-card-badge {
      display: inline-block;
      font-size: 0.7rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 6px;
      background: rgba(0, 212, 230, 0.15);
      color: var(--accent);
      letter-spacing: 0.03em;
      margin-bottom: 10px;
    }

    .hero-card-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 8px;
    }

    .hero-card-desc {
      font-size: 0.85rem;
      color: var(--text-secondary);
      margin-bottom: 12px;
      line-height: 1.65;
    }

    .hero-card-link {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--accent);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .hero-card-link:hover {
      color: #4de8f5;
      text-decoration: underline;
    }

    /* ========== SECTION COMMON ========== */
    .section-block {
      padding: 72px 0;
    }

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

    .section-header {
      margin-bottom: 36px;
    }

    .section-header h2 {
      color: var(--text);
      margin-bottom: 8px;
    }

    .section-header .section-desc {
      color: var(--text-secondary);
      font-size: 0.95rem;
      max-width: 640px;
      line-height: 1.7;
    }

    /* ========== METRIC CARDS ========== */
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .metric-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 24px 20px;
      transition: var(--transition);
      box-shadow: var(--shadow-card);
    }

    .metric-card:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
    }

    .metric-card .metric-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: rgba(0, 212, 230, 0.1);
      color: var(--accent);
      font-size: 1.3rem;
      margin-bottom: 14px;
    }

    .metric-card .metric-value {
      font-size: 2rem;
      font-weight: 700;
      color: var(--accent);
      line-height: 1.2;
      margin-bottom: 4px;
    }

    .metric-card .metric-label {
      font-size: 0.85rem;
      color: var(--text-secondary);
      font-weight: 500;
    }

    .metric-card .metric-change {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-size: 0.78rem;
      font-weight: 600;
      margin-top: 8px;
      padding: 3px 10px;
      border-radius: 6px;
    }

    .metric-card .metric-change.up {
      color: var(--success);
      background: rgba(0, 230, 160, 0.12);
    }

    .metric-card .metric-change.down {
      color: var(--danger);
      background: rgba(255, 92, 122, 0.12);
    }

    .metric-card .metric-change.warn {
      color: var(--warning);
      background: rgba(255, 194, 51, 0.12);
    }

    /* ========== SERVICE MATRIX ========== */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      transition: var(--transition);
      box-shadow: var(--shadow-card);
    }

    .service-card:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
    }

    .service-card .service-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: rgba(255, 45, 120, 0.1);
      color: var(--cta);
      font-size: 1.5rem;
      margin-bottom: 16px;
    }

    .service-card h3 {
      font-size: 1.1rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text);
    }

    .service-card p {
      font-size: 0.9rem;
      color: var(--text-secondary);
      margin-bottom: 12px;
      line-height: 1.65;
    }

    .service-card .service-link {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--accent);
    }

    .service-card .service-link:hover {
      text-decoration: underline;
    }

    /* ========== COMPARISON ========== */
    .comparison-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .comparison-panel {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }

    .comparison-panel:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-hover);
    }

    .comparison-panel h3 {
      font-size: 1.05rem;
      font-weight: 600;
      margin-bottom: 12px;
      color: var(--text);
    }

    .comparison-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 8px 0;
      border-bottom: 1px solid rgba(50, 39, 82, 0.5);
      font-size: 0.88rem;
    }

    .comparison-row:last-child {
      border-bottom: none;
    }

    .comparison-row .comp-label {
      color: var(--text-secondary);
      flex-shrink: 0;
    }

    .comparison-row .comp-bar-wrap {
      flex: 1;
      height: 8px;
      background: var(--bg-lighter);
      border-radius: 999px;
      overflow: hidden;
      margin: 0 8px;
      min-width: 60px;
    }

    .comparison-row .comp-bar {
      height: 100%;
      border-radius: 999px;
      background: var(--accent);
      transition: width 0.5s ease;
    }

    .comparison-row .comp-bar.cta-bar {
      background: var(--cta);
    }

    .comparison-row .comp-bar.warn-bar {
      background: var(--warning);
    }

    .comparison-row .comp-bar.success-bar {
      background: var(--success);
    }

    .comparison-row .comp-value {
      font-weight: 700;
      font-size: 0.9rem;
      color: var(--text);
      min-width: 48px;
      text-align: right;
    }

    /* ========== TIMELINE ========== */
    .timeline-container {
      position: relative;
      padding-left: 24px;
    }

    .timeline-container::before {
      content: "";
      position: absolute;
      left: 6px;
      top: 4px;
      bottom: 4px;
      width: 2px;
      background: var(--border);
      border-radius: 999px;
    }

    .timeline-item {
      position: relative;
      padding: 0 0 28px 28px;
    }

    .timeline-item:last-child {
      padding-bottom: 0;
    }

    .timeline-item::before {
      content: "";
      position: absolute;
      left: -24px;
      top: 6px;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--accent);
      border: 3px solid var(--bg);
      box-shadow: 0 0 0 3px rgba(0, 212, 230, 0.3);
    }

    .timeline-item .timeline-year {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--cta);
      letter-spacing: 0.04em;
      text-transform: uppercase;
      margin-bottom: 4px;
    }

    .timeline-item h3 {
      font-size: 1rem;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 6px;
    }

    .timeline-item p {
      font-size: 0.88rem;
      color: var(--text-secondary);
      line-height: 1.65;
      margin-bottom: 0;
    }

    /* ========== NEWS LIST ========== */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .news-item {
      display: flex;
      gap: 18px;
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 18px;
      transition: var(--transition);
      box-shadow: var(--shadow-card);
    }

    .news-item:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
    }

    .news-item .news-img {
      width: 110px;
      height: 90px;
      object-fit: cover;
      border-radius: 10px;
      flex-shrink: 0;
    }

    .news-item .news-content {
      flex: 1;
      min-width: 0;
    }

    .news-item .news-date {
      font-size: 0.75rem;
      color: var(--text-muted);
      margin-bottom: 6px;
      font-weight: 500;
    }

    .news-item .news-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 6px;
      line-height: 1.45;
    }

    .news-item .news-summary {
      font-size: 0.85rem;
      color: var(--text-secondary);
      line-height: 1.6;
      margin-bottom: 8px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .news-item .news-link {
      font-size: 0.82rem;
      font-weight: 600;
      color: var(--accent);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .news-item .news-link:hover {
      text-decoration: underline;
    }

    /* ========== BRAND INTRO ========== */
    .brand-intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .brand-intro-text h2 {
      margin-bottom: 16px;
    }

    .brand-intro-text p {
      font-size: 0.95rem;
      color: var(--text-secondary);
      line-height: 1.85;
      margin-bottom: 14px;
    }

    .brand-intro-img {
      width: 100%;
      height: 320px;
      object-fit: cover;
      border-radius: var(--radius-card);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-card);
    }

    /* ========== TOPIC GRID ========== */
    .topic-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .topic-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      overflow: hidden;
      transition: var(--transition);
      box-shadow: var(--shadow-card);
    }

    .topic-card:hover {
      border-color: var(--cta);
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
    }

    .topic-card .topic-img {
      width: 100%;
      height: 160px;
      object-fit: cover;
    }

    .topic-card .topic-body {
      padding: 16px 18px;
    }

    .topic-card h3 {
      font-size: 0.95rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text);
    }

    .topic-card p {
      font-size: 0.8rem;
      color: var(--text-secondary);
      margin-bottom: 8px;
      line-height: 1.55;
    }

    .topic-card .topic-link {
      font-size: 0.78rem;
      font-weight: 600;
      color: var(--cta);
    }

    .topic-card .topic-link:hover {
      text-decoration: underline;
    }

    /* ========== SAFETY / ASSURANCE ========== */
    .assurance-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .assurance-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 22px 20px;
      text-align: left;
      transition: var(--transition);
      box-shadow: var(--shadow-card);
    }

    .assurance-card:hover {
      border-color: var(--success);
      box-shadow: var(--shadow-hover);
    }

    .assurance-card .assurance-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: rgba(0, 230, 160, 0.1);
      color: var(--success);
      font-size: 1.2rem;
      margin-bottom: 12px;
    }

    .assurance-card h3 {
      font-size: 0.95rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text);
    }

    .assurance-card p {
      font-size: 0.82rem;
      color: var(--text-secondary);
      margin-bottom: 0;
      line-height: 1.6;
    }

    /* ========== QUICK ANSWERS ========== */
    .quick-answers-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .quick-answer-item {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 16px 18px;
      transition: var(--transition);
    }

    .quick-answer-item:hover {
      border-color: var(--accent);
    }

    .quick-answer-item .qa-q {
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 4px;
    }

    .quick-answer-item .qa-a {
      font-size: 0.85rem;
      color: var(--text-secondary);
      line-height: 1.55;
      margin-bottom: 0;
    }

    /* ========== FAQ ========== */
    .faq-list .accordion-item {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 12px;
      margin-bottom: 10px;
      overflow: hidden;
    }

    .faq-list .accordion-button {
      background: transparent;
      color: var(--text);
      font-weight: 600;
      font-size: 0.95rem;
      padding: 16px 20px;
      border: none;
      box-shadow: none;
    }

    .faq-list .accordion-button:not(.collapsed) {
      color: var(--accent);
      background: rgba(0, 212, 230, 0.05);
    }

    .faq-list .accordion-button:focus {
      box-shadow: none;
      outline: 2px solid var(--accent);
      outline-offset: -2px;
    }

    .faq-list .accordion-body {
      background: rgba(0, 0, 0, 0.12);
      color: var(--text-secondary);
      font-size: 0.88rem;
      line-height: 1.7;
      padding: 14px 20px 18px;
    }

    /* ========== FORM ========== */
    .form-section {
      background: var(--bg-light);
    }

    .form-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 32px 28px;
      box-shadow: var(--shadow-card);
      max-width: 600px;
      margin: 0 auto;
    }

    .form-label {
      font-size: 0.82rem;
      font-weight: 500;
      color: var(--text-secondary);
      margin-bottom: 6px;
      display: block;
    }

    .form-control-dark {
      background: var(--bg-lighter);
      border: 1px solid var(--border);
      border-radius: var(--radius-input);
      color: var(--text);
      padding: 12px 16px;
      font-size: 0.95rem;
      width: 100%;
      transition: var(--transition);
    }

    .form-control-dark:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(0, 212, 230, 0.15);
      outline: none;
    }

    .form-control-dark::placeholder {
      color: var(--text-muted);
    }

    .form-check-input {
      background-color: var(--bg-lighter);
      border-color: var(--border);
    }

    .form-check-input:checked {
      background-color: var(--accent);
      border-color: var(--accent);
    }

    .form-check-label {
      color: var(--text-secondary);
      font-size: 0.85rem;
    }

    .form-hint {
      font-size: 0.72rem;
      color: var(--text-muted);
      margin-top: 10px;
    }

    /* ========== SUBSCRIBE STRIP ========== */
    .subscribe-card {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 28px 32px;
      box-shadow: var(--shadow-card);
    }

    .subscribe-card .sub-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: rgba(255, 45, 120, 0.1);
      color: var(--cta);
      font-size: 1.5rem;
      flex-shrink: 0;
    }

    .subscribe-card .sub-text {
      flex: 1;
    }

    .subscribe-card .sub-text h3 {
      font-size: 1.1rem;
      font-weight: 600;
      margin-bottom: 4px;
    }

    .subscribe-card .sub-text p {
      font-size: 0.85rem;
      color: var(--text-secondary);
      margin-bottom: 0;
    }

    /* ========== FOOTER ========== */
    .site-footer {
      background: var(--primary-dark);
      border-top: 1px solid var(--border);
      padding: 48px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 32px;
    }

    .footer-brand h3 {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 8px;
    }

    .footer-brand p {
      font-size: 0.85rem;
      color: var(--text-secondary);
      line-height: 1.7;
      max-width: 340px;
    }

    .footer-col h4 {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 12px;
    }

    .footer-col ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }

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

    .footer-col ul li a {
      font-size: 0.85rem;
      color: var(--text-secondary);
      transition: var(--transition);
    }

    .footer-col ul li a:hover {
      color: var(--accent);
      text-decoration: none;
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      padding-top: 20px;
      border-top: 1px solid var(--border);
    }

    .footer-bottom .copyright {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .footer-bottom .footer-links {
      display: flex;
      gap: 16px;
      font-size: 0.8rem;
    }

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

    .footer-bottom .footer-links a:hover {
      color: var(--accent);
      text-decoration: none;
    }

    /* ========== RESPONSIVE ========== */
    @media (max-width: 1199px) {
      .metric-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .service-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .topic-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .assurance-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 991px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .comparison-grid {
        grid-template-columns: 1fr;
      }
      .brand-intro-grid {
        grid-template-columns: 1fr;
      }
      .news-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
      }
      .main-nav-desktop {
        display: none;
      }
      .navbar-toggler-custom {
        display: inline-flex;
      }
      .quick-answers-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 767px) {
      .metric-grid {
        grid-template-columns: 1fr;
      }
      .service-grid {
        grid-template-columns: 1fr;
      }
      .topic-grid {
        grid-template-columns: 1fr;
      }
      .assurance-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
      }
      .subscribe-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        padding: 24px 20px;
      }
      .section-block {
        padding: 48px 0;
      }
      .hero-section {
        padding: 40px 0 36px;
      }
      .brand-row {
        height: 56px;
      }
      .chip-nav {
        top: 56px;
      }
      .hero-data-capsules {
        gap: 8px;
      }
      .data-capsule {
        padding: 8px 12px;
        min-width: 80px;
      }
      .data-capsule .capsule-value {
        font-size: 1.1rem;
      }
      .section-header {
        margin-bottom: 24px;
      }
    }

    @media (max-width: 575px) {
      .hero-cta-group {
        flex-direction: column;
        gap: 10px;
      }
      .btn-primary-custom,
      .btn-outline-accent {
        width: 100%;
        justify-content: center;
      }
      .news-item {
        flex-direction: column;
      }
      .news-item .news-img {
        width: 100%;
        height: 160px;
      }
      .container-custom {
        padding-left: 14px;
        padding-right: 14px;
      }
      .container-wide {
        padding-left: 14px;
        padding-right: 14px;
      }
      .section-block {
        padding: 36px 0;
      }
      .form-card {
        padding: 22px 16px;
      }
    }

/* roulang page: category3 */
:root {
            --primary: #1e1145;
            --primary-dark: #160d33;
            --primary-light: #32255c;
            --accent: #00d4e6;
            --cta: #ff2d78;
            --bg: #0f0b1e;
            --bg-light: #140f24;
            --bg-lighter: #1a1330;
            --card: #241a3d;
            --border: #322752;
            --text: #f2edf7;
            --text-secondary: #a89bbd;
            --text-muted: #7c6f99;
            --success: #00e6a0;
            --warning: #ffc233;
            --danger: #ff5c7a;
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-input: 10px;
            --radius-chip: 999px;
            --shadow-card: 0 6px 22px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 12px 32px rgba(0, 212, 230, 0.16);
            --transition: all 0.25s ease;
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            min-height: 100vh;
            margin: 0;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: #4de8f5;
            text-decoration: underline;
        }
        a:focus,
        button:focus,
        input:focus,
        select:focus,
        textarea:focus {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container-custom {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ========== HEADER & NAV ========== */
        .site-header {
            background: var(--primary-dark);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1030;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.45);
        }
        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 16px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }
        .brand-logo:hover {
            color: var(--accent);
            text-decoration: none;
        }
        .brand-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary-light);
            border: 1px solid var(--border);
            color: var(--accent);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .brand-suffix {
            font-size: 0.75rem;
            font-weight: 400;
            color: var(--text-secondary);
            letter-spacing: 0.05em;
            margin-left: 2px;
        }
        .main-nav-desktop {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .main-nav-desktop .nav-link-item {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            border-radius: 10px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
        }
        .main-nav-desktop .nav-link-item:hover {
            color: var(--accent);
            text-decoration: none;
            background: rgba(0, 212, 230, 0.08);
        }
        .main-nav-desktop .nav-link-item.active {
            color: var(--accent);
            background: rgba(0, 212, 230, 0.12);
        }
        .navbar-toggler-custom {
            display: none;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 8px 12px;
            color: var(--text);
            cursor: pointer;
            font-size: 1.4rem;
            line-height: 1;
            transition: var(--transition);
        }
        .navbar-toggler-custom:hover {
            border-color: var(--accent);
            color: var(--accent);
        }
        .mobile-menu {
            display: none;
            background: var(--primary-dark);
            border-top: 1px solid var(--border);
            padding: 12px 0;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link-item {
            display: block;
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .mobile-menu .nav-link-item:hover,
        .mobile-menu .nav-link-item.active {
            color: var(--accent);
            background: rgba(0, 212, 230, 0.08);
            text-decoration: none;
        }

        /* ========== CHIP NAV ========== */
        .chip-nav {
            background: var(--bg-light);
            border-bottom: 1px solid var(--border);
            padding: 8px 0;
            position: sticky;
            top: 64px;
            z-index: 1020;
        }
        .chip-container {
            display: flex;
            gap: 8px;
            overflow-x: auto;
            scrollbar-width: thin;
            -webkit-overflow-scrolling: touch;
            padding: 2px 4px;
        }
        .chip-container::-webkit-scrollbar {
            height: 4px;
        }
        .chip-container::-webkit-scrollbar-track {
            background: transparent;
        }
        .chip-container::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 999px;
        }
        .chip-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-chip);
            border: 1px solid var(--border);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            background: var(--bg-light);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .chip-link:hover {
            color: var(--accent);
            border-color: var(--accent);
            background: rgba(0, 212, 230, 0.06);
            text-decoration: none;
        }
        .chip-link.active {
            color: var(--accent);
            border-color: var(--accent);
            background: rgba(0, 212, 230, 0.1);
            font-weight: 600;
        }

        /* ========== PAGE HEADER ========== */
        .page-header-section {
            background: radial-gradient(ellipse at 20% 20%, rgba(30, 17, 69, 0.9) 0%, var(--bg) 70%);
            border-bottom: 1px solid var(--border);
            padding: 48px 0 40px;
            position: relative;
            overflow: hidden;
        }
        .page-header-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/8e5463e1e193188d.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            pointer-events: none;
        }
        .page-header-section .container-custom {
            position: relative;
            z-index: 1;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 14px;
            flex-wrap: wrap;
        }
        .breadcrumb-custom a {
            color: var(--text-secondary);
        }
        .breadcrumb-custom a:hover {
            color: var(--accent);
        }
        .breadcrumb-sep {
            color: var(--text-muted);
        }
        .page-header-content {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 32px;
            align-items: center;
        }
        .page-header-text h1 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
            line-height: 1.25;
        }
        .page-header-text .page-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
            max-width: 680px;
        }
        .header-meta-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .header-meta-tags .badge-tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(0, 212, 230, 0.1);
            color: var(--accent);
            border: 1px solid rgba(0, 212, 230, 0.25);
        }
        .header-image-wrap {
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            background: var(--card);
            aspect-ratio: 16/10;
        }
        .header-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ========== STATS BAR ========== */
        .stats-bar-section {
            background: var(--bg-light);
            border-bottom: 1px solid var(--border);
            padding: 16px 0;
        }
        .stats-bar {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            align-items: center;
        }
        .stat-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-secondary);
        }
        .stat-item .stat-value {
            font-weight: 700;
            color: var(--accent);
            font-size: 1rem;
        }
        .stat-divider {
            width: 1px;
            height: 24px;
            background: var(--border);
        }

        /* ========== MAIN CONTENT ========== */
        .main-content {
            padding: 56px 0 64px;
        }
        .section-block {
            margin-bottom: 56px;
        }
        .section-heading {
            margin-bottom: 24px;
        }
        .section-heading h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .section-heading p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        /* ========== ARTICLE CARDS ========== */
        .article-card-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .article-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .article-card-img {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-lighter);
        }
        .article-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .article-card-body {
            padding: 18px 20px 16px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 6px;
        }
        .article-card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .article-card-summary {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            flex: 1;
        }
        .article-card-link {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .article-card-link:hover {
            text-decoration: underline;
        }

        /* ========== PAGINATION ========== */
        .pagination-wrap {
            display: flex;
            justify-content: center;
            margin-top: 32px;
        }
        .pagination-custom {
            display: flex;
            gap: 6px;
            align-items: center;
        }
        .pagination-custom a,
        .pagination-custom span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 38px;
            height: 38px;
            padding: 0 10px;
            border-radius: 8px;
            border: 1px solid var(--border);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--card);
            transition: var(--transition);
        }
        .pagination-custom a:hover {
            border-color: var(--accent);
            color: var(--accent);
            text-decoration: none;
        }
        .pagination-custom .page-current {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
            font-weight: 700;
        }
        .pagination-custom .page-disabled {
            opacity: 0.4;
            pointer-events: none;
        }

        /* ========== RECOMMENDED ========== */
        .recommend-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .recommend-card {
            background: var(--bg-lighter);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 14px;
            transition: var(--transition);
            display: block;
        }
        .recommend-card:hover {
            border-color: var(--accent);
            text-decoration: none;
            background: var(--card);
        }
        .recommend-card .rec-tag {
            font-size: 0.7rem;
            color: var(--warning);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 6px;
            display: block;
        }
        .recommend-card .rec-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text);
            line-height: 1.45;
            margin-bottom: 4px;
        }
        .recommend-card .rec-date {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* ========== TOOL TIPS ========== */
        .tool-tip-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .tool-tip-card {
            background: var(--bg-lighter);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 20px;
            transition: var(--transition);
        }
        .tool-tip-card:hover {
            border-color: var(--accent);
        }
        .tool-tip-step {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--accent);
            font-weight: 700;
            font-size: 0.85rem;
            margin-bottom: 10px;
            border: 1px solid var(--border);
        }
        .tool-tip-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .tool-tip-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: radial-gradient(ellipse at 70% 50%, rgba(30, 17, 69, 0.8) 0%, var(--bg-light) 70%);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 36px 32px;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .cta-section p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }
        .cta-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: center;
            align-items: center;
            max-width: 600px;
            margin: 0 auto;
        }
        .cta-form input[type="email"],
        .cta-form input[type="text"] {
            flex: 1;
            min-width: 200px;
            padding: 12px 16px;
            border-radius: var(--radius-input);
            border: 1px solid var(--border);
            background: var(--bg-lighter);
            color: var(--text);
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .cta-form input:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(0, 212, 230, 0.15);
        }
        .btn-custom-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            border: none;
            background: var(--cta);
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-custom-cta:hover {
            background: #ff4d8f;
            transform: scale(1.02);
            color: #fff;
            text-decoration: none;
        }
        .btn-custom-cta:active {
            transform: scale(0.98);
        }

        /* ========== GLOSSARY ========== */
        .glossary-tags {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .glossary-tag {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-chip);
            border: 1px solid var(--border);
            font-size: 0.85rem;
            color: var(--text-secondary);
            background: var(--bg-lighter);
            transition: var(--transition);
        }
        .glossary-tag:hover {
            border-color: var(--accent);
            color: var(--accent);
            cursor: default;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--primary-dark);
            border-top: 1px solid var(--border);
            padding: 48px 0 24px;
            margin-top: 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 16px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-links {
            display: flex;
            gap: 8px;
            align-items: center;
        }
        .footer-links a {
            color: var(--text-secondary);
        }
        .footer-links a:hover {
            color: var(--accent);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1199.98px) {
            .recommend-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        @media (max-width: 991.98px) {
            .page-header-content {
                grid-template-columns: 1fr;
            }
            .header-image-wrap {
                max-width: 480px;
            }
            .article-card-grid {
                grid-template-columns: 1fr;
            }
            .tool-tip-grid {
                grid-template-columns: 1fr;
            }
            .recommend-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 767.98px) {
            .main-nav-desktop {
                display: none;
            }
            .navbar-toggler-custom {
                display: flex;
                align-items: center;
            }
            .brand-row {
                height: 56px;
            }
            .chip-nav {
                top: 56px;
            }
            .page-header-section {
                padding: 32px 0;
            }
            .page-header-text h1 {
                font-size: 1.8rem;
            }
            .main-content {
                padding: 40px 0 48px;
            }
            .section-block {
                margin-bottom: 40px;
            }
            .stats-bar {
                gap: 16px;
            }
            .stat-divider {
                display: none;
            }
            .cta-section {
                padding: 24px 18px;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-form input[type="email"],
            .cta-form input[type="text"] {
                width: 100%;
                min-width: unset;
            }
            .recommend-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 575.98px) {
            .container-custom {
                padding-left: 14px;
                padding-right: 14px;
            }
            .page-header-text h1 {
                font-size: 1.6rem;
            }
            .article-card-body {
                padding: 14px 16px 12px;
            }
            .article-card-title {
                font-size: 0.95rem;
            }
            .pagination-custom a,
            .pagination-custom span {
                min-width: 32px;
                height: 34px;
                font-size: 0.8rem;
                padding: 0 8px;
            }
            .chip-link {
                padding: 6px 12px;
                font-size: 0.8rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1e1145;
            --primary-dark: #160d33;
            --primary-light: #32255c;
            --accent: #00d4e6;
            --cta: #ff2d78;
            --bg: #0f0b1e;
            --bg-light: #140f24;
            --bg-lighter: #1a1330;
            --card: #241a3d;
            --border: #322752;
            --text: #f2edf7;
            --text-secondary: #a89bbd;
            --text-muted: #7c6f99;
            --success: #00e6a0;
            --warning: #ffc233;
            --danger: #ff5c7a;
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-input: 10px;
            --radius-chip: 999px;
            --shadow-card: 0 6px 22px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 12px 32px rgba(0, 212, 230, 0.16);
            --transition: all 0.25s ease;
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            min-height: 100vh;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: #4de8f5;
            text-decoration: underline;
        }
        a:focus,
        button:focus,
        input:focus,
        select:focus,
        textarea:focus {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

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

        .container-custom {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .container-wide {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ========== HEADER & NAV ========== */
        .site-header {
            background: var(--primary-dark);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1030;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.45);
        }
        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 16px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }
        .brand-logo:hover {
            color: var(--accent);
            text-decoration: none;
        }
        .brand-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary-light);
            border: 1px solid var(--border);
            color: var(--accent);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .brand-suffix {
            font-size: 0.75rem;
            font-weight: 400;
            color: var(--text-secondary);
            letter-spacing: 0.05em;
            margin-left: 2px;
        }
        .main-nav-desktop {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .main-nav-desktop .nav-link-item {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            border-radius: 10px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
        }
        .main-nav-desktop .nav-link-item:hover {
            color: var(--accent);
            text-decoration: none;
            background: rgba(0, 212, 230, 0.08);
        }
        .main-nav-desktop .nav-link-item.active {
            color: var(--accent);
            background: rgba(0, 212, 230, 0.12);
        }
        .navbar-toggler-custom {
            display: none;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 8px 12px;
            color: var(--text);
            cursor: pointer;
            font-size: 1.4rem;
            line-height: 1;
            transition: var(--transition);
        }
        .navbar-toggler-custom:hover {
            border-color: var(--accent);
            color: var(--accent);
        }
        .mobile-menu {
            display: none;
            background: var(--primary-dark);
            border-top: 1px solid var(--border);
            padding: 12px 0;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link-item {
            display: block;
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .mobile-menu .nav-link-item:hover,
        .mobile-menu .nav-link-item.active {
            color: var(--accent);
            background: rgba(0, 212, 230, 0.08);
            text-decoration: none;
        }

        /* ========== CHIP NAV ========== */
        .chip-nav {
            background: var(--bg-light);
            border-bottom: 1px solid var(--border);
            padding: 8px 0;
            position: sticky;
            top: 64px;
            z-index: 1020;
        }
        .chip-container {
            display: flex;
            gap: 8px;
            overflow-x: auto;
            scrollbar-width: thin;
            -webkit-overflow-scrolling: touch;
            padding: 2px 4px;
        }
        .chip-container::-webkit-scrollbar {
            height: 4px;
        }
        .chip-container::-webkit-scrollbar-track {
            background: transparent;
        }
        .chip-container::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 999px;
        }
        .chip-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-chip);
            border: 1px solid var(--border);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            background: var(--bg-light);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .chip-link:hover {
            color: var(--accent);
            border-color: var(--accent);
            background: rgba(0, 212, 230, 0.06);
            text-decoration: none;
        }
        .chip-link.active {
            color: var(--accent);
            border-color: var(--accent);
            background: rgba(0, 212, 230, 0.1);
            font-weight: 600;
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-section {
            padding: 28px 0 16px;
            background: var(--bg);
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
            padding: 0;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb-custom li {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb-custom li:not(:last-child)::after {
            content: "/";
            color: var(--text-muted);
            font-size: 0.8rem;
        }
        .breadcrumb-custom a {
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .breadcrumb-custom a:hover {
            color: var(--accent);
            text-decoration: none;
        }
        .breadcrumb-custom .current {
            color: var(--text);
            font-weight: 500;
        }

        /* ========== CATEGORY HEADER ========== */
        .category-header-section {
            padding: 40px 0 56px;
            background: var(--bg);
        }
        .category-header-card {
            background: var(--bg-light);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 36px 40px;
            display: flex;
            gap: 32px;
            align-items: center;
            box-shadow: var(--shadow-card);
            overflow: hidden;
            position: relative;
        }
        .category-header-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), var(--cta));
            opacity: 0.7;
        }
        .category-header-content {
            flex: 1 1 60%;
            min-width: 0;
        }
        .category-header-content h1 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.01em;
            margin-bottom: 16px;
            color: var(--text);
            line-height: 1.3;
        }
        .category-header-content .category-summary {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
        }
        .category-header-image {
            flex: 1 1 38%;
            min-width: 0;
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border);
            background: var(--bg-lighter);
        }
        .category-header-image img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            border-radius: 12px;
        }

        /* ========== CATEGORY STATS BAR ========== */
        .category-stats-bar {
            padding: 0 0 48px;
            background: var(--bg);
        }
        .stats-strip {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            background: var(--bg-light);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 16px 24px;
        }
        .stat-mini-item {
            flex: 1 1 auto;
            min-width: 120px;
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 14px;
            border-right: 1px solid var(--border);
        }
        .stat-mini-item:last-child {
            border-right: none;
        }
        .stat-mini-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--bg-lighter);
            border: 1px solid var(--border);
            color: var(--accent);
            font-size: 1rem;
            flex-shrink: 0;
        }
        .stat-mini-icon.pink {
            color: var(--cta);
            border-color: rgba(255, 45, 120, 0.3);
        }
        .stat-mini-icon.green {
            color: var(--success);
            border-color: rgba(0, 230, 160, 0.3);
        }
        .stat-mini-icon.yellow {
            color: var(--warning);
            border-color: rgba(255, 194, 51, 0.3);
        }
        .stat-mini-label {
            display: block;
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-bottom: 2px;
        }
        .stat-mini-value {
            display: block;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.3;
        }

        /* ========== ARTICLE LIST ========== */
        .article-list-section {
            padding: 0 0 64px;
            background: var(--bg);
        }
        .section-heading {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 28px;
            flex-wrap: wrap;
        }
        .section-heading h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text);
            margin: 0;
            letter-spacing: -0.01em;
        }
        .section-heading .heading-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: var(--radius-chip);
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--accent);
            background: rgba(0, 212, 230, 0.08);
            border: 1px solid rgba(0, 212, 230, 0.25);
        }
        .article-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
            margin-bottom: 24px;
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .article-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .article-card-image {
            height: 180px;
            overflow: hidden;
            position: relative;
            background: var(--bg-lighter);
        }
        .article-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .article-card:hover .article-card-image img {
            transform: scale(1.04);
        }
        .article-card-image .article-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            z-index: 2;
            background: var(--cta);
            color: #fff;
        }
        .article-card-image .article-badge.strategy {
            background: var(--cta);
        }
        .article-card-image .article-badge.data {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .article-card-body {
            padding: 20px 22px 18px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .article-card-date {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-card-date i {
            font-size: 0.8rem;
        }
        .article-card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
            line-height: 1.5;
            transition: var(--transition);
        }
        .article-card:hover .article-card-title {
            color: var(--accent);
        }
        .article-card-excerpt {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }
        .article-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent);
            transition: var(--transition);
            align-self: flex-start;
        }
        .article-card-link:hover {
            color: #4de8f5;
            text-decoration: none;
            gap: 10px;
        }

        /* ========== PAGINATION ========== */
        .pagination-section {
            padding: 0 0 56px;
            background: var(--bg);
        }
        .pagination-custom {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .pagination-custom .page-link-item {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 14px;
            border-radius: 10px;
            border: 1px solid var(--border);
            background: var(--bg-light);
            color: var(--text-secondary);
            font-size: 0.88rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .pagination-custom .page-link-item:hover {
            border-color: var(--accent);
            color: var(--accent);
            text-decoration: none;
            background: rgba(0, 212, 230, 0.06);
        }
        .pagination-custom .page-link-item.active {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
            font-weight: 700;
        }
        .pagination-custom .page-link-item.disabled {
            opacity: 0.4;
            pointer-events: none;
        }

        /* ========== RECOMMENDED READING ========== */
        .recommended-section {
            padding: 0 0 64px;
            background: var(--bg);
        }
        .recommended-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 18px 20px;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
            height: 100%;
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .recommended-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .recommended-card-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--bg-lighter);
            border: 1px solid var(--border);
            color: var(--accent);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .recommended-card-content h3 {
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
            line-height: 1.4;
        }
        .recommended-card-content p {
            font-size: 0.8rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.5;
        }

        /* ========== STRATEGY CHECKLIST ========== */
        .strategy-checklist-section {
            padding: 0 0 64px;
            background: var(--bg-light);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .strategy-checklist-section .container-custom {
            padding-top: 56px;
            padding-bottom: 24px;
        }
        .checklist-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 24px 26px;
            box-shadow: var(--shadow-card);
            height: 100%;
            transition: var(--transition);
        }
        .checklist-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .checklist-card .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary-light);
            border: 1px solid var(--border);
            color: var(--accent);
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .checklist-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .checklist-card p {
            font-size: 0.86rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* ========== CTA SUBSCRIBE ========== */
        .cta-subscribe-section {
            padding: 64px 0;
            background: var(--bg);
        }
        .subscribe-card {
            background: var(--bg-light);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 40px 36px;
            text-align: center;
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }
        .subscribe-card::before {
            content: "";
            position: absolute;
            top: -40%;
            right: -20%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 45, 120, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }
        .subscribe-card::after {
            content: "";
            position: absolute;
            bottom: -30%;
            left: -15%;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 212, 230, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }
        .subscribe-card h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
            position: relative;
            z-index: 1;
        }
        .subscribe-card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 28px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }
        .subscribe-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: center;
            position: relative;
            z-index: 1;
        }
        .subscribe-form .form-control {
            background: var(--bg-lighter);
            border: 1px solid var(--border);
            border-radius: var(--radius-input);
            color: var(--text);
            padding: 10px 16px;
            font-size: 0.9rem;
            min-width: 240px;
            flex: 1 1 auto;
            max-width: 360px;
            transition: var(--transition);
        }
        .subscribe-form .form-control:focus {
            border-color: var(--accent);
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 212, 230, 0.15);
        }
        .subscribe-form .form-control::placeholder {
            color: var(--text-muted);
        }
        .btn-primary-custom {
            background: var(--cta);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: 10px 28px;
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-primary-custom:hover {
            background: #ff5a99;
            transform: scale(1.02);
            box-shadow: 0 6px 20px rgba(255, 45, 120, 0.35);
        }
        .btn-primary-custom:active {
            transform: scale(0.98);
        }
        .subscribe-form .privacy-note {
            font-size: 0.72rem;
            color: var(--text-muted);
            margin-top: 16px;
            flex-basis: 100%;
            text-align: center;
            position: relative;
            z-index: 1;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--primary-dark);
            border-top: 1px solid var(--border);
            padding: 48px 0 0;
            margin-top: 0;
        }
        .footer-grid {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
            padding-bottom: 32px;
            border-bottom: 1px solid var(--border);
        }
        .footer-brand {
            flex: 2 1 280px;
            min-width: 240px;
        }
        .footer-brand h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        .footer-col {
            flex: 1 1 140px;
            min-width: 120px;
        }
        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul a {
            font-size: 0.85rem;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .footer-col ul a:hover {
            color: var(--accent);
            text-decoration: none;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding: 20px 0;
        }
        .copyright {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .footer-links {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .footer-links a {
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
            text-decoration: none;
        }
        .footer-links span {
            color: var(--text-muted);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 991.98px) {
            .main-nav-desktop {
                display: none;
            }
            .navbar-toggler-custom {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .category-header-card {
                flex-direction: column;
                padding: 28px 24px;
                text-align: center;
            }
            .category-header-image {
                width: 100%;
                flex: 1 1 auto;
            }
            .category-header-image img {
                height: 180px;
            }
            .category-header-content h1 {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 767.98px) {
            .category-header-section {
                padding: 24px 0 36px;
            }
            .category-header-card {
                padding: 20px 18px;
                gap: 20px;
            }
            .category-header-content h1 {
                font-size: 1.4rem;
            }
            .category-header-content .category-summary {
                font-size: 0.88rem;
            }
            .category-header-image img {
                height: 150px;
            }
            .category-stats-bar {
                padding-bottom: 32px;
            }
            .stats-strip {
                padding: 12px 14px;
                gap: 8px;
            }
            .stat-mini-item {
                min-width: 100px;
                padding: 6px 10px;
                border-right: none;
                border-bottom: 1px solid var(--border);
            }
            .stat-mini-item:last-child {
                border-bottom: none;
            }
            .article-list-section,
            .recommended-section,
            .pagination-section,
            .strategy-checklist-section,
            .cta-subscribe-section {
                padding-bottom: 40px;
            }
            .section-heading h2 {
                font-size: 1.25rem;
            }
            .article-card-image {
                height: 150px;
            }
            .article-card-body {
                padding: 16px 16px 14px;
            }
            .article-card-title {
                font-size: 0.95rem;
            }
            .article-card-excerpt {
                font-size: 0.82rem;
            }
            .pagination-custom .page-link-item {
                min-width: 36px;
                height: 36px;
                padding: 0 10px;
                font-size: 0.8rem;
            }
            .subscribe-card {
                padding: 28px 18px;
            }
            .subscribe-card h2 {
                font-size: 1.25rem;
            }
            .subscribe-card p {
                font-size: 0.88rem;
            }
            .subscribe-form .form-control {
                min-width: 100%;
                max-width: 100%;
            }
            .btn-primary-custom {
                width: 100%;
            }
            .footer-grid {
                flex-direction: column;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .chip-nav {
                top: 56px;
            }
            .brand-row {
                height: 56px;
            }
            .brand-logo {
                font-size: 1.05rem;
            }
            .brand-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.95rem;
            }
        }
        @media (max-width: 575.98px) {
            .article-card-image {
                height: 130px;
            }
            .article-card-title {
                font-size: 0.9rem;
            }
            .article-card-excerpt {
                font-size: 0.8rem;
                -webkit-line-clamp: 3;
            }
            .section-heading {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .category-header-content h1 {
                font-size: 1.25rem;
            }
            .stats-strip {
                flex-direction: column;
            }
            .stat-mini-item {
                width: 100%;
                border-right: none;
                border-bottom: 1px solid var(--border);
            }
            .stat-mini-item:last-child {
                border-bottom: none;
            }
            .recommended-card {
                padding: 14px 16px;
                gap: 10px;
            }
            .recommended-card-icon {
                width: 34px;
                height: 34px;
                font-size: 0.95rem;
            }
            .recommended-card-content h3 {
                font-size: 0.85rem;
            }
            .checklist-card {
                padding: 18px 18px;
            }
            .checklist-card h3 {
                font-size: 0.92rem;
            }
            .checklist-card p {
                font-size: 0.8rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1e1145;
            --primary-dark: #160d33;
            --primary-light: #32255c;
            --accent: #00d4e6;
            --cta: #ff2d78;
            --bg: #0f0b1e;
            --bg-light: #140f24;
            --bg-lighter: #1a1330;
            --card: #241a3d;
            --border: #322752;
            --text: #f2edf7;
            --text-secondary: #a89bbd;
            --text-muted: #7c6f99;
            --success: #00e6a0;
            --warning: #ffc233;
            --danger: #ff5c7a;
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-input: 10px;
            --radius-chip: 999px;
            --shadow-card: 0 6px 22px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 12px 32px rgba(0, 212, 230, 0.16);
            --transition: all 0.25s ease;
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            min-height: 100vh;
        }

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

        a:hover {
            color: #4de8f5;
            text-decoration: underline;
        }

        a:focus,
        button:focus,
        input:focus,
        select:focus,
        textarea:focus {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

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

        .container-custom {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .container-wide {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ========== HEADER & NAV ========== */
        .site-header {
            background: var(--primary-dark);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1030;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.45);
        }

        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 16px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }

        .brand-logo:hover {
            color: var(--accent);
            text-decoration: none;
        }

        .brand-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary-light);
            border: 1px solid var(--border);
            color: var(--accent);
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .brand-suffix {
            font-size: 0.75rem;
            font-weight: 400;
            color: var(--text-secondary);
            letter-spacing: 0.05em;
            margin-left: 2px;
        }

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

        .main-nav-desktop .nav-link-item {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            border-radius: 10px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
        }

        .main-nav-desktop .nav-link-item:hover {
            color: var(--accent);
            text-decoration: none;
            background: rgba(0, 212, 230, 0.08);
        }

        .main-nav-desktop .nav-link-item.active {
            color: var(--accent);
            background: rgba(0, 212, 230, 0.12);
        }

        .navbar-toggler-custom {
            display: none;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 8px 12px;
            color: var(--text);
            cursor: pointer;
            font-size: 1.4rem;
            line-height: 1;
            transition: var(--transition);
        }

        .navbar-toggler-custom:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .mobile-menu {
            display: none;
            background: var(--primary-dark);
            border-top: 1px solid var(--border);
            padding: 12px 0;
            flex-direction: column;
            gap: 4px;
        }

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

        .mobile-menu .nav-link-item {
            display: block;
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .mobile-menu .nav-link-item:hover,
        .mobile-menu .nav-link-item.active {
            color: var(--accent);
            background: rgba(0, 212, 230, 0.08);
            text-decoration: none;
        }

        /* ========== CHIP NAV ========== */
        .chip-nav {
            background: var(--bg-light);
            border-bottom: 1px solid var(--border);
            padding: 8px 0;
            position: sticky;
            top: 64px;
            z-index: 1020;
        }

        .chip-container {
            display: flex;
            gap: 8px;
            overflow-x: auto;
            scrollbar-width: thin;
            -webkit-overflow-scrolling: touch;
            padding: 2px 4px;
        }

        .chip-container::-webkit-scrollbar {
            height: 4px;
        }

        .chip-container::-webkit-scrollbar-track {
            background: transparent;
        }

        .chip-container::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 999px;
        }

        .chip-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-chip);
            border: 1px solid var(--border);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            background: var(--bg-light);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .chip-link:hover {
            color: var(--accent);
            border-color: var(--accent);
            background: rgba(0, 212, 230, 0.06);
            text-decoration: none;
        }

        .chip-link.active {
            color: var(--accent);
            border-color: var(--accent);
            background: rgba(0, 212, 230, 0.1);
            font-weight: 600;
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-section {
            padding: 16px 0 4px;
            background: transparent;
        }

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

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

        .breadcrumb-custom a:hover {
            color: var(--accent);
            text-decoration: none;
        }

        .breadcrumb-custom .separator {
            color: var(--text-muted);
            font-size: 0.75rem;
        }

        .breadcrumb-custom .current {
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ========== CATEGORY HEADER ========== */
        .category-header-section {
            padding: 32px 0 28px;
            background: var(--bg);
            border-bottom: 1px solid var(--border);
        }

        .category-header-grid {
            display: grid;
            grid-template-columns: 1fr 360px;
            gap: 32px;
            align-items: center;
        }

        .category-header-content h1 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .category-header-content .category-desc {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
            max-width: 640px;
        }

        .category-header-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            aspect-ratio: 16/9;
        }

        .category-header-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ========== STATS STRIP ========== */
        .stats-strip-section {
            padding: 20px 0;
            background: var(--bg-light);
            border-bottom: 1px solid var(--border);
        }

        .stats-strip-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .stat-strip-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            background: var(--bg-lighter);
            border: 1px solid var(--border);
            border-radius: 10px;
        }

        .stat-strip-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(0, 212, 230, 0.1);
            border: 1px solid rgba(0, 212, 230, 0.2);
            color: var(--accent);
            font-size: 1rem;
            flex-shrink: 0;
        }

        .stat-strip-info .stat-label {
            font-size: 0.75rem;
            color: var(--text-muted);
            line-height: 1.3;
            margin-bottom: 2px;
        }

        .stat-strip-info .stat-value {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.3;
        }

        /* ========== LIST SECTION ========== */
        .list-section {
            padding: 48px 0 40px;
            background: var(--bg);
        }

        .section-header-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0;
            line-height: 1.4;
        }

        .section-title .title-highlight {
            color: var(--accent);
        }

        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .article-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

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

        .article-card-image {
            aspect-ratio: 16/9;
            overflow: hidden;
            position: relative;
        }

        .article-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .article-card-body {
            padding: 16px 16px 18px;
            display: flex;
            flex-direction: column;
            flex: 1;
            gap: 8px;
        }

        .article-card-date {
            font-size: 0.75rem;
            color: var(--text-muted);
            letter-spacing: 0.02em;
        }

        .article-card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.45;
            margin-bottom: 0;
        }

        .article-card-title a {
            color: var(--text);
            transition: var(--transition);
        }

        .article-card-title a:hover {
            color: var(--accent);
            text-decoration: none;
        }

        .article-card-excerpt {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 0;
        }

        .article-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 4px;
        }

        .read-more-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent);
            transition: var(--transition);
        }

        .read-more-link:hover {
            color: #4de8f5;
            text-decoration: none;
            gap: 8px;
        }

        .read-more-link i {
            font-size: 0.75rem;
        }

        /* ========== PAGINATION ========== */
        .pagination-section {
            padding: 8px 0 32px;
            background: var(--bg);
        }

        .pagination-custom {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            flex-wrap: wrap;
        }

        .page-link-item {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 38px;
            height: 38px;
            padding: 0 12px;
            border-radius: 10px;
            border: 1px solid var(--border);
            background: var(--bg-light);
            color: var(--text-secondary);
            font-size: 0.85rem;
            font-weight: 500;
            transition: var(--transition);
        }

        .page-link-item:hover {
            border-color: var(--accent);
            color: var(--accent);
            text-decoration: none;
            background: rgba(0, 212, 230, 0.06);
        }

        .page-link-item.active {
            background: var(--accent);
            border-color: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
        }

        .page-link-item.disabled {
            opacity: 0.4;
            pointer-events: none;
            cursor: default;
        }

        .page-link-item.prev-next {
            padding: 0 16px;
            gap: 4px;
        }

        /* ========== HOT RECOMMEND ========== */
        .hot-recommend-section {
            padding: 36px 0 44px;
            background: var(--bg-light);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .hot-recommend-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .hot-card {
            display: flex;
            gap: 14px;
            padding: 14px;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            transition: var(--transition);
            align-items: center;
        }

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

        .hot-card-image {
            width: 72px;
            height: 72px;
            border-radius: 10px;
            overflow: hidden;
            flex-shrink: 0;
            border: 1px solid var(--border);
        }

        .hot-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .hot-card-content {
            flex: 1;
            min-width: 0;
        }

        .hot-card-title {
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text);
            line-height: 1.45;
            margin-bottom: 4px;
        }

        .hot-card-title a {
            color: var(--text);
            transition: var(--transition);
        }

        .hot-card-title a:hover {
            color: var(--accent);
            text-decoration: none;
        }

        .hot-card-meta {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* ========== GUIDE STEPS ========== */
        .guide-steps-section {
            padding: 48px 0;
            background: var(--bg);
        }

        .guide-steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .guide-step-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 20px 16px;
            text-align: left;
            transition: var(--transition);
        }

        .guide-step-card:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-card);
        }

        .guide-step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary-light);
            border: 1px solid var(--border);
            color: var(--accent);
            font-size: 0.85rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .guide-step-title {
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .guide-step-desc {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ========== SUBSCRIBE CTA ========== */
        .subscribe-cta-section {
            padding: 44px 0 48px;
            background: var(--bg-light);
            border-top: 1px solid var(--border);
        }

        .subscribe-cta-card {
            background: var(--bg-lighter);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-card);
        }

        .subscribe-cta-text h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .subscribe-cta-text p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.6;
        }

        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            background: var(--cta);
            border: 1px solid var(--cta);
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            transition: var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary-custom:hover {
            background: #ff4d93;
            border-color: #ff4d93;
            color: #fff;
            text-decoration: none;
            transform: scale(1.02);
            box-shadow: 0 8px 24px rgba(255, 45, 120, 0.25);
        }

        .btn-primary-custom:active {
            transform: scale(0.98);
        }

        .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            background: transparent;
            border: 1px solid var(--accent);
            color: var(--accent);
            font-size: 0.9rem;
            font-weight: 600;
            transition: var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-secondary-custom:hover {
            background: rgba(0, 212, 230, 0.1);
            border-color: #4de8f5;
            color: #4de8f5;
            text-decoration: none;
        }

        /* ========== GLOSSARY TAGS ========== */
        .glossary-section {
            padding: 36px 0 44px;
            background: var(--bg);
            border-bottom: 1px solid var(--border);
        }

        .glossary-tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 16px;
        }

        .glossary-tag {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            border-radius: 999px;
            background: var(--bg-lighter);
            border: 1px solid var(--border);
            font-size: 0.82rem;
            color: var(--text-secondary);
            transition: var(--transition);
            cursor: default;
        }

        .glossary-tag:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(0, 212, 230, 0.06);
        }

        .glossary-tag .tag-dot {
            display: inline-block;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            margin-right: 6px;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--primary-dark);
            border-top: 1px solid var(--border);
            padding: 40px 0 0;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 28px;
        }

        .site-footer h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .site-footer h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        .footer-brand p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

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

        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--accent);
            text-decoration: none;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 0 20px;
            border-top: 1px solid var(--border);
            flex-wrap: wrap;
        }

        .footer-bottom .copyright {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .footer-bottom .footer-links {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
        }

        .footer-bottom .footer-links a {
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .footer-bottom .footer-links a:hover {
            color: var(--accent);
            text-decoration: none;
        }

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

        /* ========== RESPONSIVE ========== */
        @media (max-width: 992px) {
            .category-header-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .category-header-image {
                max-width: 100%;
            }

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

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

            .hot-recommend-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .main-nav-desktop {
                display: none;
            }

            .navbar-toggler-custom {
                display: inline-flex;
            }

            .chip-nav {
                top: 64px;
            }

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

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .subscribe-cta-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 20px;
            }

            .category-header-content h1 {
                font-size: 1.5rem;
            }

            .section-title {
                font-size: 1.25rem;
            }
        }

        @media (max-width: 576px) {
            .brand-row {
                height: 56px;
                gap: 8px;
            }

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

            .brand-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }

            .chip-nav {
                top: 56px;
                padding: 6px 0;
            }

            .chip-link {
                padding: 6px 12px;
                font-size: 0.78rem;
            }

            .stats-strip-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }

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

            .pagination-custom {
                gap: 4px;
            }

            .page-link-item {
                min-width: 32px;
                height: 32px;
                padding: 0 8px;
                font-size: 0.78rem;
            }

            .category-header-section {
                padding: 20px 0 20px;
            }

            .list-section {
                padding: 32px 0 28px;
            }

            .hot-recommend-section {
                padding: 28px 0 32px;
            }

            .guide-steps-section {
                padding: 32px 0;
            }

            .subscribe-cta-section {
                padding: 32px 0 36px;
            }

            .glossary-section {
                padding: 28px 0 32px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 10px;
            }

            .subscribe-cta-card {
                padding: 16px;
                gap: 14px;
            }

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

            .hot-card {
                flex-direction: row;
                align-items: center;
            }

            .hot-card-image {
                width: 56px;
                height: 56px;
            }
        }

/* roulang page: category4 */
:root {
  --primary: #1e1145;
  --primary-dark: #160d33;
  --primary-light: #32255c;
  --accent: #00d4e6;
  --cta: #ff2d78;
  --bg: #0f0b1e;
  --bg-light: #140f24;
  --bg-lighter: #1a1330;
  --card: #241a3d;
  --border: #322752;
  --text: #f2edf7;
  --text-secondary: #a89bbd;
  --text-muted: #7c6f99;
  --success: #00e6a0;
  --warning: #ffc233;
  --danger: #ff5c7a;
  --radius-card: 16px;
  --radius-btn: 12px;
  --radius-input: 10px;
  --radius-chip: 999px;
  --shadow-card: 0 6px 22px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 12px 32px rgba(0, 212, 230, 0.16);
  --transition: all 0.25s ease;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-stack);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}
a:hover {
  color: #4de8f5;
  text-decoration: underline;
}
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

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

.container-custom {
  max-width: 1240px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ========== HEADER & NAV ========== */
.site-header {
  background: var(--primary-dark);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1030;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.45);
}
.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
  padding: 8px 0;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}
.brand-logo:hover {
  color: var(--accent);
  text-decoration: none;
}
.brand-logo .logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary-light);
  border: 1px solid var(--border);
  color: var(--accent);
  font-size: 1.1rem;
  flex-shrink: 0;
}
.brand-suffix {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  margin-left: 2px;
}
.main-nav-desktop {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}
.main-nav-desktop .nav-link-item {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav-desktop .nav-link-item:hover {
  color: var(--accent);
  text-decoration: none;
  background: rgba(0, 212, 230, 0.08);
}
.main-nav-desktop .nav-link-item.active {
  color: var(--accent);
  background: rgba(0, 212, 230, 0.12);
  font-weight: 600;
}
.navbar-toggler-custom {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 12px;
  color: var(--text);
  cursor: pointer;
  font-size: 1.4rem;
  line-height: 1;
  transition: var(--transition);
}
.navbar-toggler-custom:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.mobile-menu {
  display: none;
  background: var(--primary-dark);
  border-top: 1px solid var(--border);
  padding: 12px 0;
  flex-direction: column;
  gap: 4px;
}
.mobile-menu.open {
  display: flex;
}
.mobile-menu .nav-link-item {
  display: block;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}
.mobile-menu .nav-link-item:hover,
.mobile-menu .nav-link-item.active {
  color: var(--accent);
  background: rgba(0, 212, 230, 0.08);
  text-decoration: none;
}

/* ========== CHIP NAV ========== */
.chip-nav {
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
  padding: 8px 0;
  position: sticky;
  top: 64px;
  z-index: 1020;
}
.chip-container {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
  padding: 2px 0;
}
.chip-container::-webkit-scrollbar {
  height: 4px;
}
.chip-container::-webkit-scrollbar-track {
  background: transparent;
}
.chip-container::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 999px;
}
.chip-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-chip);
  border: 1px solid var(--border);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  background: var(--bg-light);
  transition: var(--transition);
  flex-shrink: 0;
}
.chip-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(0, 212, 230, 0.06);
  text-decoration: none;
}
.chip-link.active {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(0, 212, 230, 0.1);
  font-weight: 600;
}

/* ========== SECTION BASE ========== */
.main-content section {
  padding: 64px 0;
}
@media (max-width: 575.98px) {
  .main-content section {
    padding: 40px 0;
  }
}
.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: 0.01em;
}
.section-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

/* ========== CATEGORY HEADER ========== */
.category-header {
  background: radial-gradient(ellipse at 20% 30%, rgba(30, 17, 69, 0.95) 0%, var(--bg) 70%);
  border-bottom: 1px solid var(--border);
  padding: 48px 0 40px;
}
.breadcrumb-custom {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.breadcrumb-custom a {
  color: var(--text-secondary);
}
.breadcrumb-custom a:hover {
  color: var(--accent);
}
.breadcrumb-custom .separator {
  color: var(--border);
}
.category-header h1 {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}
.category-header .category-summary {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 720px;
  line-height: 1.8;
}
.category-header .category-cover {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  margin-top: 24px;
}
.category-header .category-cover img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  opacity: 0.85;
}

/* ========== STATS BAR ========== */
.stats-bar-section {
  padding: 24px 0 !important;
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
}
.stats-bar {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  align-items: center;
}
.stat-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-lighter);
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.stat-chip .stat-icon {
  color: var(--accent);
  font-size: 1rem;
}
.stat-chip .stat-value {
  color: var(--text);
  font-weight: 600;
}

/* ========== ARTICLE LIST ========== */
.article-list-section {
  background: var(--bg);
}
.article-card {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 18px;
  margin-bottom: 20px;
  transition: var(--transition);
}
.article-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.article-card .article-img {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  height: 140px;
}
.article-card .article-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.article-card .article-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.article-card .article-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}
.article-card .article-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin: 0;
}
.article-card .article-summary {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
  flex: 1;
}
.article-card .article-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  align-self: flex-start;
}
.article-card .article-link:hover {
  color: #4de8f5;
  text-decoration: underline;
}

/* ========== PAGINATION ========== */
.pagination-custom {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 32px 0 8px;
  flex-wrap: wrap;
}
.pagination-custom .page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-lighter);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
}
.pagination-custom .page-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0, 212, 230, 0.06);
  text-decoration: none;
}
.pagination-custom .page-btn.active {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  font-weight: 700;
}
.pagination-custom .page-btn.disabled {
  opacity: 0.4;
  pointer-events: none;
}

/* ========== RECOMMENDED ========== */
.recommended-section {
  background: var(--bg-light);
}
.recommended-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.recommended-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 14px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.recommended-card:hover {
  border-color: var(--cta);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.recommended-card .rec-date {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.recommended-card .rec-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin: 0;
  line-height: 1.5;
}
.recommended-card .rec-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--cta);
}
.recommended-card .rec-link:hover {
  color: #ff6a9b;
  text-decoration: underline;
}

/* ========== TRACKING STEPS ========== */
.tracking-section {
  background: var(--bg);
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.step-card {
  background: var(--bg-lighter);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 24px 20px;
  transition: var(--transition);
}
.step-card:hover {
  border-color: var(--success);
  box-shadow: 0 8px 24px rgba(0, 230, 160, 0.08);
}
.step-card .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary-light);
  border: 1px solid var(--border);
  color: var(--success);
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.step-card .step-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}
.step-card .step-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* ========== CTA / SUBSCRIBE ========== */
.cta-section {
  background: radial-gradient(ellipse at center, rgba(30, 17, 69, 0.9) 0%, var(--bg-light) 75%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cta-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}
.cta-info .cta-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.cta-info .cta-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
}
.cta-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}
.form-group input,
.form-group select {
  background: var(--bg-lighter);
  border: 1px solid var(--border);
  border-radius: var(--radius-input);
  padding: 10px 14px;
  color: var(--text);
  font-size: 0.95rem;
  transition: var(--transition);
}
.form-group input:focus,
.form-group select:focus {
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 0 2px rgba(0, 212, 230, 0.15);
}
.form-group select option {
  background: var(--bg-lighter);
  color: var(--text);
}
.btn-primary-custom {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--cta);
  color: #fff;
  border: none;
  border-radius: var(--radius-btn);
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}
.btn-primary-custom:hover {
  background: #ff4d8a;
  transform: scale(1.02);
  text-decoration: none;
  color: #fff;
}
.btn-primary-custom:active {
  transform: scale(0.98);
}
.form-privacy {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin: 0;
}

/* ========== TAG CLOUD ========== */
.tag-cloud-section {
  background: var(--bg-light);
  border-top: 1px solid var(--border);
}
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tag-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text-secondary);
  background: var(--bg-lighter);
  transition: var(--transition);
  cursor: default;
}
.tag-badge:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0, 212, 230, 0.06);
}

/* ========== FOOTER ========== */
.site-footer {
  background: var(--primary-dark);
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}
.footer-brand h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}
.footer-brand p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}
.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}
.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-col ul li {
  margin-bottom: 8px;
}
.footer-col ul li a {
  font-size: 0.88rem;
  color: var(--text-secondary);
}
.footer-col ul li a:hover {
  color: var(--accent);
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}
.footer-bottom .copyright {
  font-size: 0.82rem;
  color: var(--text-muted);
}
.footer-bottom .footer-links {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.footer-bottom .footer-links a {
  color: var(--text-secondary);
}
.footer-bottom .footer-links a:hover {
  color: var(--accent);
}
.footer-bottom .footer-links span {
  color: var(--border);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1199.98px) {
  .recommended-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 991.98px) {
  .container-custom {
    padding-left: 16px;
    padding-right: 16px;
  }
  .category-header h1 {
    font-size: 2rem;
  }
  .article-card {
    grid-template-columns: 1fr;
  }
  .article-card .article-img {
    height: 180px;
  }
  .cta-box {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand {
    grid-column: span 2;
  }
}

@media (max-width: 767.98px) {
  .main-nav-desktop {
    display: none;
  }
  .navbar-toggler-custom {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .chip-nav {
    top: 56px;
  }
  .brand-row {
    min-height: 56px;
  }
  .category-header {
    padding: 32px 0 28px;
  }
  .category-header h1 {
    font-size: 1.7rem;
  }
  .category-header .category-cover img {
    height: 180px;
  }
  .stats-bar {
    gap: 12px;
  }
  .recommended-grid {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .footer-brand {
    grid-column: span 1;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 575.98px) {
  .container-custom {
    padding-left: 12px;
    padding-right: 12px;
  }
  .category-header h1 {
    font-size: 1.5rem;
  }
  .section-title {
    font-size: 1.4rem;
  }
  .article-card .article-title {
    font-size: 1rem;
  }
  .article-card .article-summary {
    font-size: 0.85rem;
  }
  .cta-info .cta-title {
    font-size: 1.25rem;
  }
  .pagination-custom .page-btn {
    min-width: 34px;
    height: 34px;
    font-size: 0.82rem;
    padding: 0 8px;
  }
}

/* roulang page: category5 */
:root {
            --primary: #1e1145;
            --primary-dark: #160d33;
            --primary-light: #32255c;
            --accent: #00d4e6;
            --cta: #ff2d78;
            --bg: #0f0b1e;
            --bg-light: #140f24;
            --bg-lighter: #1a1330;
            --card: #241a3d;
            --border: #322752;
            --text: #f2edf7;
            --text-secondary: #a89bbd;
            --text-muted: #7c6f99;
            --success: #00e6a0;
            --warning: #ffc233;
            --danger: #ff5c7a;
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-input: 10px;
            --radius-chip: 999px;
            --shadow-card: 0 6px 22px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 12px 32px rgba(0, 212, 230, 0.16);
            --transition: all 0.25s ease;
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

        a:hover {
            color: #4de8f5;
            text-decoration: underline;
        }

        a:focus,
        button:focus,
        input:focus,
        select:focus,
        textarea:focus {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

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

        .container-custom {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .container-wide {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ========== HEADER & NAV ========== */
        .site-header {
            background: var(--primary-dark);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1030;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.45);
        }

        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 16px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }

        .brand-logo:hover {
            color: var(--accent);
            text-decoration: none;
        }

        .brand-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary-light);
            border: 1px solid var(--border);
            color: var(--accent);
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .brand-suffix {
            font-size: 0.75rem;
            font-weight: 400;
            color: var(--text-secondary);
            letter-spacing: 0.05em;
            margin-left: 2px;
        }

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

        .main-nav-desktop .nav-link-item {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            border-radius: 10px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
        }

        .main-nav-desktop .nav-link-item:hover {
            color: var(--accent);
            text-decoration: none;
            background: rgba(0, 212, 230, 0.08);
        }

        .main-nav-desktop .nav-link-item.active {
            color: var(--accent);
            background: rgba(0, 212, 230, 0.12);
        }

        .navbar-toggler-custom {
            display: none;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 8px 12px;
            color: var(--text);
            cursor: pointer;
            font-size: 1.4rem;
            line-height: 1;
            transition: var(--transition);
        }

        .navbar-toggler-custom:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .mobile-menu {
            display: none;
            background: var(--primary-dark);
            border-top: 1px solid var(--border);
            padding: 12px 0;
            flex-direction: column;
            gap: 4px;
        }

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

        .mobile-menu .nav-link-item {
            display: block;
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .mobile-menu .nav-link-item:hover,
        .mobile-menu .nav-link-item.active {
            color: var(--accent);
            background: rgba(0, 212, 230, 0.08);
            text-decoration: none;
        }

        /* ========== CHIP NAV ========== */
        .chip-nav {
            background: var(--bg-light);
            border-bottom: 1px solid var(--border);
            padding: 8px 0;
            position: sticky;
            top: 64px;
            z-index: 1020;
        }

        .chip-container {
            display: flex;
            gap: 8px;
            overflow-x: auto;
            scrollbar-width: thin;
            -webkit-overflow-scrolling: touch;
            padding: 2px 4px;
        }

        .chip-container::-webkit-scrollbar {
            height: 4px;
        }

        .chip-container::-webkit-scrollbar-track {
            background: transparent;
        }

        .chip-container::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 999px;
        }

        .chip-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-chip);
            border: 1px solid var(--border);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            background: var(--bg-light);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .chip-link:hover {
            color: var(--accent);
            border-color: var(--accent);
            background: rgba(0, 212, 230, 0.06);
            text-decoration: none;
        }

        .chip-link.active {
            color: var(--accent);
            border-color: var(--accent);
            background: rgba(0, 212, 230, 0.1);
            font-weight: 600;
        }

        /* ========== PAGE HEADER (Category) ========== */
        .page-header-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--bg) 60%, var(--bg-light) 100%);
            padding: 48px 0 36px;
            border-bottom: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }

        .page-header-section::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 212, 230, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

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

        .breadcrumb-custom a:hover {
            color: var(--accent);
            text-decoration: none;
        }

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

        .breadcrumb-custom .current {
            color: var(--accent);
            font-weight: 500;
        }

        .page-header-content {
            display: flex;
            gap: 32px;
            align-items: flex-start;
            flex-wrap: wrap;
        }

        .page-header-text {
            flex: 1;
            min-width: 280px;
        }

        .page-header-text h1 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }

        .page-header-text .header-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.75;
        }

        .page-header-image {
            flex-shrink: 0;
            width: 280px;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
        }

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

        /* ========== STAT BAR ========== */
        .stats-bar-section {
            background: var(--bg-light);
            padding: 20px 0;
            border-bottom: 1px solid var(--border);
        }

        .stats-bar {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
        }

        .stat-mini {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        .stat-mini .stat-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--primary-light);
            border: 1px solid var(--border);
            color: var(--accent);
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .stat-mini .stat-value {
            font-weight: 700;
            color: var(--text);
        }

        .stat-mini .stat-label {
            color: var(--text-muted);
            font-size: 0.8rem;
        }

        /* ========== CHECKLIST SECTION ========== */
        .checklist-section {
            background: var(--bg);
            padding: 56px 0;
        }

        .section-title {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 600px;
        }

        .checklist-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 16px;
            margin-top: 20px;
        }

        .checklist-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 20px;
            transition: var(--transition);
            position: relative;
        }

        .checklist-card:hover {
            border-color: var(--warning);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .checklist-card .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--warning);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 0.8rem;
            margin-bottom: 10px;
            flex-shrink: 0;
        }

        .checklist-card h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .checklist-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.65;
        }

        /* ========== ARTICLE LIST ========== */
        .article-list-section {
            background: var(--bg-light);
            padding: 56px 0;
        }

        .article-list-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 24px;
            margin-top: 28px;
        }

        .article-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .article-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .article-card .article-cover {
            width: 100%;
            height: 180px;
            overflow: hidden;
            flex-shrink: 0;
        }

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

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

        .article-card .article-body {
            padding: 18px 20px 16px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .article-card .article-date {
            font-size: 0.78rem;
            color: var(--text-muted);
            letter-spacing: 0.02em;
            margin-bottom: 8px;
        }

        .article-card .article-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.45;
            margin-bottom: 8px;
        }

        .article-card .article-summary {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.65;
            flex: 1;
            margin-bottom: 12px;
        }

        .article-card .read-more {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent);
            transition: var(--transition);
            align-self: flex-start;
        }

        .article-card .read-more:hover {
            color: #4de8f5;
            text-decoration: underline;
        }

        /* ========== PAGINATION ========== */
        .pagination-wrapper {
            background: var(--bg-light);
            padding: 0 0 48px;
            display: flex;
            justify-content: center;
        }

        .pagination-custom {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .pagination-custom .page-link-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 38px;
            height: 38px;
            padding: 0 10px;
            border-radius: 8px;
            border: 1px solid var(--border);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--card);
            transition: var(--transition);
        }

        .pagination-custom .page-link-custom:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(0, 212, 230, 0.06);
            text-decoration: none;
        }

        .pagination-custom .page-link-custom.active {
            border-color: var(--cta);
            color: #fff;
            background: var(--cta);
            font-weight: 600;
        }

        .pagination-custom .page-link-custom.disabled {
            opacity: 0.5;
            pointer-events: none;
            border-color: var(--border);
            color: var(--text-muted);
        }

        /* ========== RECOMMENDED ========== */
        .recommended-section {
            background: var(--bg);
            padding: 56px 0;
        }

        .recommended-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 18px;
            margin-top: 24px;
        }

        .recommended-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 16px;
            transition: var(--transition);
            display: flex;
            gap: 14px;
            align-items: center;
        }

        .recommended-card:hover {
            border-color: var(--cta);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .recommended-card .rec-thumb {
            width: 64px;
            height: 64px;
            border-radius: 10px;
            overflow: hidden;
            flex-shrink: 0;
            border: 1px solid var(--border);
        }

        .recommended-card .rec-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .recommended-card .rec-info {
            flex: 1;
            min-width: 0;
        }

        .recommended-card .rec-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 4px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .recommended-card .rec-tag {
            font-size: 0.75rem;
            color: var(--text-muted);
            letter-spacing: 0.02em;
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--bg-light);
            padding: 56px 0;
        }

        .faq-list {
            margin-top: 24px;
            max-width: 820px;
        }

        .faq-item {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-question {
            width: 100%;
            background: transparent;
            border: none;
            padding: 16px 20px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            text-align: left;
            line-height: 1.5;
        }

        .faq-question:hover {
            color: var(--accent);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 1rem;
            color: var(--accent);
            transition: transform 0.3s ease;
        }

        .faq-question.active .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 20px;
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .faq-answer.open {
            max-height: 300px;
            padding: 0 20px 18px;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--bg) 50%, var(--bg-light) 100%);
            padding: 56px 0;
            border-top: 1px solid var(--border);
        }

        .cta-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 32px;
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            box-shadow: var(--shadow-card);
        }

        .cta-card .cta-text {
            flex: 1;
            min-width: 240px;
        }

        .cta-card .cta-text h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .cta-card .cta-text p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin: 0;
        }

        .cta-card .cta-form {
            flex: 1;
            min-width: 280px;
        }

        .form-group-custom {
            margin-bottom: 12px;
        }

        .form-group-custom label {
            display: block;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 4px;
        }

        .form-control-custom {
            width: 100%;
            padding: 10px 14px;
            border-radius: var(--radius-input);
            border: 1px solid var(--border);
            background: var(--bg-lighter);
            color: var(--text);
            font-size: 0.9rem;
            transition: var(--transition);
            font-family: var(--font-stack);
        }

        .form-control-custom::placeholder {
            color: var(--text-muted);
        }

        .form-control-custom:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 2px rgba(0, 212, 230, 0.2);
        }

        .checkbox-group {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 14px;
        }

        .checkbox-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.82rem;
            color: var(--text-secondary);
            cursor: pointer;
            padding: 6px 12px;
            border-radius: 999px;
            border: 1px solid var(--border);
            transition: var(--transition);
            user-select: none;
        }

        .checkbox-label:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .checkbox-label input[type="checkbox"] {
            width: 16px;
            height: 16px;
            accent-color: var(--cta);
            margin: 0;
            cursor: pointer;
        }

        .btn-primary-custom {
            background: var(--cta);
            color: #fff;
            border: none;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            font-family: var(--font-stack);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            letter-spacing: 0.01em;
        }

        .btn-primary-custom:hover {
            background: #ff4d8e;
            transform: scale(1.02);
            box-shadow: 0 4px 16px rgba(255, 45, 120, 0.35);
        }

        .btn-primary-custom:active {
            transform: scale(0.98);
        }

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

        .form-privacy-note {
            font-size: 0.72rem;
            color: var(--text-muted);
            margin-top: 8px;
            line-height: 1.5;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--primary-dark);
            border-top: 1px solid var(--border);
            padding: 48px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 28px;
        }

        .footer-brand h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .footer-brand p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 12px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

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

        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--accent);
            text-decoration: none;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 18px 0;
            border-top: 1px solid var(--border);
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .footer-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-links a {
            color: var(--text-secondary);
            font-size: 0.78rem;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
            text-decoration: underline;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 991px) {
            .page-header-content {
                flex-direction: column;
            }

            .page-header-image {
                width: 100%;
                max-width: 400px;
            }

            .page-header-image img {
                height: 200px;
            }

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

        @media (max-width: 767px) {
            .main-nav-desktop {
                display: none;
            }

            .navbar-toggler-custom {
                display: inline-flex;
            }

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

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

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

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

            .cta-card {
                flex-direction: column;
                padding: 24px;
            }

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

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

            .stats-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
        }

        @media (max-width: 575px) {
            .container-custom {
                padding-left: 14px;
                padding-right: 14px;
            }

            .brand-logo {
                font-size: 1.05rem;
            }

            .brand-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }

            .brand-suffix {
                font-size: 0.68rem;
            }

            .page-header-section {
                padding: 32px 0 24px;
            }

            .page-header-text h1 {
                font-size: 1.4rem;
            }

            .section-title {
                font-size: 1.35rem;
            }

            .article-card .article-cover {
                height: 160px;
            }

            .checklist-card h3 {
                font-size: 0.9rem;
            }

            .chip-link {
                padding: 6px 12px;
                font-size: 0.78rem;
            }

            .btn-primary-custom {
                padding: 10px 22px;
                font-size: 0.88rem;
            }
        }

        @media (max-width: 400px) {
            .brand-logo {
                font-size: 0.95rem;
            }

            .brand-suffix {
                display: none;
            }

            .page-header-text h1 {
                font-size: 1.25rem;
            }

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

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}