/* roulang page: index */
:root {
    --bg-primary: #0B1A30;
    --bg-secondary: #0F0C20;
    --accent-lime: #CCFF00;
    --accent-cyan: #00F0FF;
    --text-primary: #FFFFFF;
    --text-muted: #A6ACAF;
    --border-neon: rgba(0, 240, 255, 0.4);
    --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
    --radius-xl: 1.25rem;
    --radius-lg: 0.75rem;
    --radius-md: 0.5rem;
    --spacing-section: 5rem;
    --font-display: 'Inter', system-ui, -apple-system, sans-serif;
  }
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  body {
    font-family: var(--font-display);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
  }
  img {
    max-width: 100%;
    height: auto;
    display: block;
  }
  a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
  }
  a:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 3px;
    border-radius: 4px;
  }
  button:focus-visible {
    outline: 2px solid var(--accent-lime);
    outline-offset: 3px;
  }
  .container {
    width: 100%;
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
  @media (min-width: 640px) {
    .container {
      padding-left: 2rem;
      padding-right: 2rem;
    }
  }
  @media (min-width: 1024px) {
    .container {
      padding-left: 2.5rem;
      padding-right: 2.5rem;
    }
  }

  /* Navbar */
  .navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(15, 12, 32, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-neon);
    z-index: 999;
    transition: background 0.3s ease;
  }
  .navbar .nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
  }
  .nav-logo {
    font-weight: 800;
    font-size: 1.3rem;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
  }
  .nav-menu {
    display: none;
    align-items: center;
    gap: 2rem;
    list-style: none;
  }
  @media (min-width: 1024px) {
    .nav-menu {
      display: flex;
    }
  }
  .nav-menu li a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-muted);
    transition: color 0.2s ease, text-shadow 0.2s ease;
    padding: 0.25rem 0;
    position: relative;
  }
  .nav-menu li a:hover,
  .nav-menu li a.active {
    color: var(--accent-cyan);
    text-shadow: 0 0 8px rgba(0,240,255,0.4);
  }
  .nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--accent-lime);
    transition: width 0.3s ease;
  }
  .nav-menu li a:hover::after,
  .nav-menu li a.active::after {
    width: 100%;
  }
  .nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
  }
  .btn-login {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    transition: background 0.2s ease;
  }
  .btn-login:hover {
    background: rgba(255,255,255,0.08);
  }
  .btn-signup {
    background: var(--accent-lime);
    color: #0B1A30;
    font-weight: 700;
    font-size: 0.9rem;
    border: none;
    padding: 0.6rem 1.4rem;
    border-radius: 2rem;
    cursor: pointer;
    transition: background 0.25s ease, transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 0 10px rgba(204,255,0,0.5);
  }
  .btn-signup:hover {
    background: #D9FF1A;
    transform: translateY(-1px);
    box-shadow: 0 0 18px rgba(204,255,0,0.75);
  }
  .btn-signup:active {
    transform: scale(0.97);
  }
  .hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: transparent;
    border: none;
    padding: 8px;
  }
  .hamburger span {
    display: block;
    width: 26px;
    height: 2.5px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
  }
  @media (min-width: 1024px) {
    .hamburger {
      display: none;
    }
  }
  .mobile-menu {
    display: none;
    flex-direction: column;
    background: rgba(15, 12, 32, 0.95);
    backdrop-filter: blur(20px);
    padding: 1.5rem;
    border-top: 1px solid var(--border-neon);
    gap: 1rem;
  }
  .mobile-menu.active {
    display: flex;
  }
  .mobile-menu a {
    font-weight: 500;
    color: var(--text-muted);
    padding: 0.5rem 0;
  }
  .mobile-menu a:hover {
    color: var(--accent-cyan);
  }

  /* Hero */
  .hero-section {
    padding-top: 120px;
    padding-bottom: 80px;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    overflow: hidden;
  }
  .hero-section::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(11,26,48,0.75) 0%, rgba(15,12,32,0.9) 100%);
    z-index: 1;
  }
  .hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2rem;
  }
  .hero-badge {
    background: rgba(0,240,255,0.12);
    backdrop-filter: blur(8px);
    border: 1px solid var(--accent-cyan);
    color: var(--accent-cyan);
    padding: 0.4rem 1.2rem;
    border-radius: 2rem;
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
  }
  .hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    max-width: 720px;
    background: linear-gradient(to right, #FFFFFF, #CCFF00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
  @media (min-width: 768px) {
    .hero-title {
      font-size: 3.5rem;
    }
  }
  .hero-desc {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 620px;
    line-height: 1.7;
  }
  .countdown-box {
    display: flex;
    gap: 1rem;
    background: rgba(0,0,0,0.45);
    backdrop-filter: blur(14px);
    padding: 1.2rem 2rem;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(204,255,0,0.4);
  }
  .countdown-item {
    text-align: center;
  }
  .countdown-item span:first-child {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--accent-lime);
    display: block;
  }
  .hero-cta-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
  }
  .btn-primary-neon {
    background: var(--accent-lime);
    color: #0B1A30;
    font-weight: 700;
    padding: 0.9rem 2.2rem;
    border-radius: 3rem;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: 0.25s;
    box-shadow: 0 0 18px rgba(204,255,0,0.55);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
  }
  .btn-primary-neon:hover {
    background: #E0FF33;
    box-shadow: 0 0 26px rgba(204,255,0,0.8);
    transform: translateY(-2px);
  }
  .btn-outline-neon {
    background: transparent;
    border: 1.5px solid var(--accent-cyan);
    color: var(--accent-cyan);
    font-weight: 600;
    padding: 0.9rem 2.2rem;
    border-radius: 3rem;
    font-size: 1rem;
    cursor: pointer;
    transition: 0.25s;
  }
  .btn-outline-neon:hover {
    background: rgba(0,240,255,0.12);
  }

  /* Sections */
  section {
    padding-top: var(--spacing-section);
    padding-bottom: var(--spacing-section);
  }
  .section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
    text-align: left;
  }
  .section-desc {
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    font-size: 1rem;
    max-width: 680px;
    line-height: 1.65;
  }

  /* Feature Cards */
  .grid-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
  }
  @media (min-width: 640px) {
    .grid-cards {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  @media (min-width: 1024px) {
    .grid-cards {
      grid-template-columns: repeat(3, 1fr);
    }
  }
  .feature-card {
    background: rgba(15, 12, 32, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 240, 255, 0.25);
    border-radius: var(--radius-xl);
    padding: 2rem;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
  }
  .feature-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent-cyan);
    box-shadow: 0 16px 32px rgba(0,240,255,0.15);
  }
  .feature-icon {
    font-size: 2.2rem;
    color: var(--accent-lime);
    margin-bottom: 1rem;
  }

  /* Campaign block */
  .campaign-band {
    background: linear-gradient(105deg, #0F0C20 0%, #1A1540 100%);
    border-radius: 2rem;
    padding: 3rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    border: 1px solid rgba(204,255,0,0.3);
    margin-top: 1rem;
  }
  @media (min-width: 768px) {
    .campaign-band {
      flex-direction: row;
      align-items: center;
      justify-content: space-between;
    }
  }

  /* Timeline */
  .timeline {
    border-left: 3px solid var(--accent-cyan);
    padding-left: 2rem;
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
  }
  .timeline-item {
    position: relative;
  }
  .timeline-item::before {
    content: '';
    position: absolute;
    left: -2.5rem;
    top: 0.4rem;
    width: 14px;
    height: 14px;
    background: var(--accent-lime);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-lime);
  }

  /* FAQ */
  .faq-item {
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding: 1.5rem 0;
  }
  .faq-question {
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-primary);
  }

  /* CTA footer */
  .cta-bottom {
    background: radial-gradient(circle at 30% 30%, #1A1540, #0B1A30);
    border-radius: 2.5rem;
    padding: 4rem 2rem;
    text-align: left;
    margin-top: 2rem;
  }

  /* Footer */
  .site-footer {
    background: #0A0A14;
    padding: 3rem 0;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid rgba(0,240,255,0.15);
  }

  /* News list */
  .news-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
  }
  .news-list li a {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    color: var(--text-muted);
    border-bottom: 1px dashed rgba(255,255,255,0.1);
    padding-bottom: 0.5rem;
  }
  .news-list li a:hover {
    color: var(--accent-cyan);
  }

  /* FAB */
  .fab-neon {
    position: fixed;
    left: 1rem;
    bottom: 6rem;
    width: 56px;
    height: 56px;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(16px);
    border-radius: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid transparent;
    background-clip: padding-box;
    z-index: 50;
    cursor: pointer;
    box-shadow: 0 0 15px rgba(0,240,255,0.5);
    transition: 0.3s;
  }
  .fab-neon:hover {
    box-shadow: 0 0 25px rgba(0,240,255,0.8);
  }
  .fab-neon i {
    color: var(--accent-cyan);
    font-size: 1.5rem;
  }

/* roulang page: article */
:root {
            --bg: #08090F;
            --bg-card: #0D111E;
            --accent: #0052FF;
            --accent2: #00F0FF;
            --text: #FFFFFF;
            --text-muted: #CBD5E1;
            --border: rgba(0, 240, 255, 0.2);
            --radius: 16px;
            --shadow: 0 0 20px rgba(0, 240, 255, 0.15);
            --transition: 0.25s ease;
            --font: 'Inter', 'Segoe UI', system-ui, sans-serif;
        }

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

        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

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

        /* Navbar */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 50;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.6);
            transition: var(--transition);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .nav-logo {
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: -0.3px;
            background: linear-gradient(135deg, #00F0FF 0%, #0052FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            transition: opacity var(--transition);
        }

        .nav-logo:hover {
            opacity: 0.85;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 36px;
            align-items: center;
        }

        .nav-menu a {
            color: var(--text-muted);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            transition: color var(--transition);
            position: relative;
            padding: 6px 0;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: #00F0FF;
        }

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -3px;
            left: 0;
            width: 100%;
            height: 2px;
            background: #00F0FF;
            border-radius: 2px;
            box-shadow: 0 0 8px #00F0FF;
        }

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

        .btn-login {
            background: transparent;
            border: 1px solid rgba(0, 240, 255, 0.5);
            color: #00F0FF;
            padding: 10px 22px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.92rem;
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .btn-login:hover {
            background: rgba(0, 240, 255, 0.1);
            border-color: #00F0FF;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
        }

        .btn-signup {
            background: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            border: none;
            color: #08090F;
            padding: 10px 26px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.92rem;
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(0, 240, 255, 0.5);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 6px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            z-index: 55;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: #00F0FF;
            border-radius: 2px;
            transition: var(--transition);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(8, 9, 15, 0.96);
            backdrop-filter: blur(20px);
            padding: 20px 24px;
            gap: 16px;
            border-bottom: 1px solid rgba(0, 240, 255, 0.2);
        }

        .mobile-menu a {
            color: var(--text-muted);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 8px 0;
            transition: color var(--transition);
        }

        .mobile-menu a:hover {
            color: #00F0FF;
        }

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

        /* Article Layout */
        .article-header {
            margin-top: 100px;
            padding: 48px 0 32px;
            position: relative;
        }

        .breadcrumb {
            display: flex;
            gap: 8px;
            align-items: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: #00F0FF;
            text-decoration: none;
            transition: opacity var(--transition);
        }

        .breadcrumb a:hover {
            opacity: 0.8;
        }

        .breadcrumb .separator {
            color: rgba(0, 240, 255, 0.5);
        }

        .article-meta {
            display: flex;
            gap: 20px;
            align-items: center;
            flex-wrap: wrap;
            margin-bottom: 20px;
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        .article-meta .category-tag {
            background: rgba(0, 82, 255, 0.2);
            color: #00F0FF;
            padding: 4px 14px;
            border-radius: 20px;
            font-weight: 600;
            border: 1px solid rgba(0, 240, 255, 0.3);
            font-size: 0.8rem;
        }

        .article-meta .date {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-hero-img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
            border-radius: var(--radius);
            margin-bottom: 36px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

        .article-content {
            max-width: 800px;
            margin: 0 auto 60px;
            padding: 0 16px;
        }

        .article-content h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #FFFFFF 0%, #00F0FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .article-content h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-top: 44px;
            margin-bottom: 16px;
            color: #FFFFFF;
            border-left: 4px solid #00F0FF;
            padding-left: 16px;
        }

        .article-content h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin-top: 32px;
            margin-bottom: 12px;
            color: #CBD5E1;
        }

        .article-content p {
            font-size: 1.08rem;
            line-height: 1.75;
            margin-bottom: 18px;
            color: #CBD5E1;
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 20px;
            padding-left: 24px;
            color: #CBD5E1;
            font-size: 1.05rem;
        }

        .article-content li {
            margin-bottom: 10px;
            line-height: 1.65;
        }

        .article-content strong {
            color: #00F0FF;
            font-weight: 700;
        }

        .article-content a {
            color: #00F0FF;
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: opacity var(--transition);
        }

        .article-content a:hover {
            opacity: 0.8;
        }

        .article-content blockquote {
            border-left: 4px solid #0052FF;
            background: rgba(0, 82, 255, 0.08);
            padding: 20px 24px;
            margin: 28px 0;
            border-radius: 8px;
            font-style: italic;
            color: #CBD5E1;
            font-size: 1.05rem;
        }

        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            margin: 24px 0;
            border: 1px solid var(--border);
        }

        /* Pull Quote */
        .pull-quote {
            max-width: 800px;
            margin: 40px auto;
            padding: 28px 32px;
            background: rgba(0, 82, 255, 0.06);
            border-left: 5px solid #00F0FF;
            border-radius: 8px;
            font-size: 1.2rem;
            font-weight: 500;
            color: #00F0FF;
            line-height: 1.65;
            text-align: left;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #0D111E 0%, #08090F 100%);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 44px 36px;
            margin: 60px auto;
            max-width: 800px;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 1.7rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: #FFFFFF;
        }

        .cta-section p {
            color: #CBD5E1;
            margin-bottom: 24px;
            font-size: 1rem;
        }

        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary-cta {
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            color: #08090F;
            font-weight: 700;
            padding: 14px 36px;
            border-radius: 30px;
            text-decoration: none;
            transition: all var(--transition);
            box-shadow: 0 4px 18px rgba(0, 240, 255, 0.4);
            font-size: 1rem;
        }

        .btn-primary-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.6);
        }

        .btn-secondary-cta {
            background: transparent;
            border: 1px solid rgba(0, 240, 255, 0.6);
            color: #00F0FF;
            font-weight: 600;
            padding: 14px 36px;
            border-radius: 30px;
            text-decoration: none;
            transition: all var(--transition);
        }

        .btn-secondary-cta:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 14px rgba(0, 240, 255, 0.3);
        }

        /* Footer */
        .site-footer {
            padding: 36px 24px;
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            margin-top: 80px;
            background: rgba(13, 17, 30, 0.6);
        }

        .site-footer a {
            color: #CBD5E1;
            text-decoration: none;
            transition: color var(--transition);
        }

        .site-footer a:hover {
            color: #00F0FF;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 24px;
            bottom: 100px;
            z-index: 49;
            width: 52px;
            height: 52px;
            border-radius: 50px;
            background: rgba(8, 9, 15, 0.75);
            backdrop-filter: blur(14px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8, 9, 15, 0.75), rgba(8, 9, 15, 0.75)), linear-gradient(135deg, #0052FF, #00F0FF);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.45);
            transition: all 0.3s ease;
            opacity: 0.7;
            animation: floatGlow 2.5s infinite ease-in-out;
        }

        .fab-left:hover {
            opacity: 1;
            transform: scale(1.12);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.8);
        }

        .fab-left i {
            font-size: 1.6rem;
            color: #00F0FF;
        }

        @keyframes floatGlow {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-5px);
            }
        }

        /* Not found state */
        .not-found-article {
            text-align: center;
            padding: 100px 24px;
            margin-top: 120px;
        }

        .not-found-article h2 {
            font-size: 2rem;
            color: #00F0FF;
            margin-bottom: 16px;
        }

        .not-found-article p {
            color: #CBD5E1;
            margin-bottom: 24px;
        }

        .not-found-article a {
            color: #08090F;
            background: #00F0FF;
            padding: 12px 28px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 700;
            display: inline-block;
            transition: all var(--transition);
        }

        .not-found-article a:hover {
            background: #0052FF;
            color: #fff;
            box-shadow: 0 0 20px #0052FF;
        }

        @media (max-width: 1024px) {
            .nav-menu {
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                display: flex;
            }
            .hamburger {
                display: flex;
            }
            .article-content h1 {
                font-size: 2rem;
            }
            .article-content h2 {
                font-size: 1.5rem;
            }
            .pull-quote {
                margin: 28px 16px;
                font-size: 1rem;
            }
            .cta-section {
                padding: 30px 20px;
                margin: 40px 16px;
            }
        }

        @media (max-width: 520px) {
            .nav-logo {
                font-size: 1.1rem;
            }
            .btn-login,
            .btn-signup {
                padding: 8px 18px;
                font-size: 0.85rem;
            }
            .article-content h1 {
                font-size: 1.7rem;
            }
            .fab-left {
                width: 44px;
                height: 44px;
                left: 12px;
                bottom: 90px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0F0C20;
            --bg-secondary: #0B1A30;
            --accent-lime: #CCFF00;
            --accent-cyan: #00F0FF;
            --text-primary: #FFFFFF;
            --text-muted: #A6ACAF;
            --card-bg: #151228;
            --border-neon: #1E2A45;
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-lime: 0 0 20px rgba(204, 255, 0, 0.3);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', system-ui, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
        }

        .container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        /* Navbar */
        .navbar {
            background: rgba(15, 12, 32, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-neon);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 20px rgba(0, 240, 255, 0.08);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
            flex-wrap: wrap;
        }
        .nav-logo {
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--accent-cyan);
            text-decoration: none;
            letter-spacing: -0.5px;
            white-space: nowrap;
            transition: color 0.2s;
        }
        .nav-logo:hover {
            color: var(--accent-lime);
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 1.5rem;
            align-items: center;
        }
        .nav-menu a {
            color: var(--text-muted);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.2s, text-shadow 0.2s;
            padding: 0.25rem 0;
            position: relative;
        }
        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--accent-cyan);
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
        }
        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-cyan);
            box-shadow: 0 0 6px var(--accent-cyan);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 0.5rem 1.25rem;
            border-radius: 999px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
            font-size: 0.9rem;
            white-space: nowrap;
        }
        .btn-login:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            border: none;
            color: #000;
            padding: 0.5rem 1.5rem;
            border-radius: 999px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.2s;
            font-size: 0.9rem;
            white-space: nowrap;
            box-shadow: 0 0 12px rgba(204, 255, 0, 0.5);
        }
        .btn-signup:hover {
            box-shadow: 0 0 24px rgba(204, 255, 0, 0.8);
            transform: translateY(-1px);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 4px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 4px;
            z-index: 110;
        }
        .hamburger span {
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            transition: all 0.3s;
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(15, 12, 32, 0.98);
            backdrop-filter: blur(16px);
            padding: 1rem;
            gap: 0.75rem;
            border-top: 1px solid var(--border-neon);
        }
        .mobile-menu a {
            color: var(--text-muted);
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem;
            border-radius: 8px;
            transition: 0.2s;
        }
        .mobile-menu a:hover {
            color: var(--accent-cyan);
            background: rgba(0,240,255,0.05);
        }

        /* FAB */
        .fab-btn {
            position: fixed;
            left: 1rem;
            bottom: 5rem;
            width: 56px;
            height: 56px;
            border-radius: 999px;
            background: rgba(0,0,0,0.6);
            backdrop-filter: blur(8px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            z-index: 90;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }
        .fab-btn::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 999px;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            z-index: -1;
            background-size: 200% 200%;
            animation: flowLight 3s linear infinite;
        }
        .fab-btn i {
            color: white;
            font-size: 1.5rem;
            text-shadow: 0 0 8px var(--accent-cyan);
            transition: 0.2s;
        }
        .fab-btn:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.9);
            transform: scale(1.1);
        }
        .fab-btn:active {
            transform: scale(0.95);
        }
        .notification-dot {
            position: absolute;
            top: 8px;
            right: 8px;
            width: 12px;
            height: 12px;
            background: #FF4500;
            border-radius: 50%;
            box-shadow: 0 0 10px #FF4500;
            animation: flicker 1.5s infinite;
        }

        /* Footer */
        .site-footer {
            background: #080A18;
            border-top: 1px solid var(--border-neon);
            padding: 1.5rem 0;
            margin-top: 4rem;
        }

        /* Cards & UI */
        .step-card {
            background: var(--card-bg);
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-lg);
            padding: 1.75rem;
            transition: all 0.3s;
            box-shadow: 0 4px 12px rgba(0,0,0,0.4);
        }
        .step-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0,240,255,0.25);
            transform: translateY(-4px);
        }
        .gradient-text {
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent-lime), #00C8E0);
            border: none;
            color: #000;
            padding: 0.85rem 2.25rem;
            border-radius: 999px;
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            box-shadow: 0 0 18px rgba(204, 255, 0, 0.5);
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn-primary:hover {
            box-shadow: 0 0 32px rgba(204, 255, 0, 0.85);
            transform: translateY(-3px);
        }
        .glass-panel {
            background: rgba(21, 18, 40, 0.7);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(0,240,255,0.2);
            border-radius: var(--radius-lg);
        }

        @media (max-width: 768px) {
            .nav-menu { display: none; }
            .hamburger { display: flex; }
            .mobile-menu.active { display: flex; }
            .nav-inner { padding: 0.5rem 0; }
            .container { padding-left: 1rem; padding-right: 1rem; }
        }

/* roulang page: category2 */
:root {
      --bg-primary: #0B1A30;
      --bg-secondary: #0F0C20;
      --accent-cyan: #00F0FF;
      --accent-lime: #CCFF00;
      --text-primary: #FFFFFF;
      --text-secondary: #A6ACAF;
      --border-glow: rgba(0, 240, 255, 0.3);
      --card-bg: rgba(15, 12, 32, 0.8);
      --radius-lg: 1.5rem;
      --radius-md: 1rem;
      --radius-sm: 0.75rem;
      --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.2);
      --shadow-lg: 0 15px 35px rgba(0, 0, 0, 0.4);
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
      background: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.6;
      overflow-x: hidden;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    .navbar {
      background: rgba(11, 26, 48, 0.92);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(0, 240, 255, 0.15);
      position: sticky;
      top: 0;
      z-index: 100;
      padding: 0.75rem 0;
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }
    .nav-logo {
      font-size: 1.4rem;
      font-weight: 800;
      background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      text-decoration: none;
      letter-spacing: -0.5px;
    }
    .nav-menu {
      display: flex;
      list-style: none;
      gap: 2rem;
      align-items: center;
    }
    .nav-menu a {
      color: var(--text-secondary);
      text-decoration: none;
      font-weight: 600;
      font-size: 0.95rem;
      transition: all 0.25s;
      position: relative;
      padding: 0.5rem 0;
    }
    .nav-menu a:hover, .nav-menu a.active {
      color: var(--accent-cyan);
      text-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
    }
    .nav-menu a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent-cyan);
      box-shadow: 0 0 12px var(--accent-cyan);
    }
    .nav-actions {
      display: flex;
      gap: 0.75rem;
      align-items: center;
    }
    .btn-login {
      background: transparent;
      border: 1px solid rgba(0, 240, 255, 0.5);
      color: var(--accent-cyan);
      padding: 0.5rem 1.5rem;
      border-radius: 2rem;
      font-weight: 700;
      cursor: pointer;
      transition: 0.3s;
      font-size: 0.9rem;
    }
    .btn-login:hover {
      background: rgba(0, 240, 255, 0.12);
      box-shadow: 0 0 18px rgba(0, 240, 255, 0.4);
    }
    .btn-signup {
      background: linear-gradient(135deg, var(--accent-cyan), #00B8D4);
      border: none;
      color: #0B1A30;
      padding: 0.5rem 1.8rem;
      border-radius: 2rem;
      font-weight: 700;
      cursor: pointer;
      transition: 0.3s;
      font-size: 0.9rem;
      box-shadow: 0 4px 16px rgba(0, 240, 255, 0.4);
    }
    .btn-signup:hover {
      box-shadow: 0 6px 24px rgba(0, 240, 255, 0.7);
      transform: translateY(-2px);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      width: 26px;
      height: 3px;
      background: var(--accent-cyan);
      border-radius: 4px;
      transition: 0.3s;
    }
    .mobile-menu {
      display: none;
      flex-direction: column;
      background: rgba(15, 12, 32, 0.98);
      backdrop-filter: blur(20px);
      padding: 1.5rem;
      gap: 1rem;
      border-radius: 0 0 1rem 1rem;
      margin-top: 0.75rem;
    }
    .mobile-menu a {
      color: var(--text-primary);
      font-weight: 600;
      text-decoration: none;
      padding: 0.5rem 0;
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .hero-banner {
      background: linear-gradient(135deg, #0B1A30 0%, #0F0C20 100%);
      padding: 3.5rem 0;
      position: relative;
      overflow: hidden;
    }
    .hero-banner::before {
      content: '';
      position: absolute;
      top: -30%;
      right: -10%;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(0,240,255,0.12) 0%, transparent 70%);
      border-radius: 50%;
    }
    .flash-sale-bar {
      background: linear-gradient(90deg, #CCFF00, #00F0FF);
      color: #0B1A30;
      font-weight: 800;
      padding: 0.8rem 1.5rem;
      border-radius: 3rem;
      display: inline-flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 0.95rem;
      box-shadow: 0 8px 25px rgba(204, 255, 0, 0.25);
      margin-bottom: 1.5rem;
      animation: pulseBar 2s infinite;
    }
    @keyframes pulseBar {
      0%, 100% { box-shadow: 0 8px 25px rgba(204, 255, 0, 0.3); }
      50% { box-shadow: 0 12px 32px rgba(0, 240, 255, 0.5); }
    }
    .countdown {
      background: #0B1A30;
      color: #fff;
      padding: 0.35rem 0.9rem;
      border-radius: 2rem;
      font-weight: 700;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      margin-bottom: 1rem;
      background: linear-gradient(135deg, #FFFFFF, #00F0FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .card-download {
      background: var(--card-bg);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      padding: 2rem;
      transition: 0.3s;
      backdrop-filter: blur(10px);
      box-shadow: var(--shadow-lg);
    }
    .card-download:hover {
      border-color: var(--accent-cyan);
      box-shadow: var(--shadow-glow);
      transform: translateY(-6px);
    }
    .btn-cta {
      background: linear-gradient(135deg, #CCFF00, #00F0FF);
      border: none;
      color: #0B1A30;
      font-weight: 800;
      padding: 0.9rem 2.2rem;
      border-radius: 3rem;
      font-size: 1.1rem;
      cursor: pointer;
      transition: 0.3s;
      box-shadow: 0 6px 20px rgba(204, 255, 0, 0.35);
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
    }
    .btn-cta:hover {
      transform: scale(1.04);
      box-shadow: 0 10px 28px rgba(0, 240, 255, 0.55);
    }
    .step-item {
      display: flex;
      gap: 1.8rem;
      align-items: flex-start;
      padding: 1.5rem 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .step-num {
      background: linear-gradient(135deg, var(--accent-cyan), #00B8D4);
      width: 48px;
      height: 48px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.4rem;
      color: #0B1A30;
      flex-shrink: 0;
      box-shadow: 0 0 18px rgba(0,240,255,0.5);
    }
    .faq-item {
      background: rgba(255,255,255,0.03);
      border-radius: 1rem;
      padding: 1.5rem;
      margin-bottom: 1rem;
      border-left: 4px solid var(--accent-cyan);
      transition: 0.2s;
    }
    .site-footer {
      background: #0A1428;
      border-top: 1px solid rgba(0,240,255,0.2);
      padding: 2rem 0;
      margin-top: 3rem;
    }
    .fab-left {
      position: fixed;
      left: 1.2rem;
      bottom: 5rem;
      z-index: 99;
      width: 56px;
      height: 56px;
      background: rgba(0,0,0,0.7);
      backdrop-filter: blur(12px);
      border-radius: 50%;
      border: 2px solid #00F0FF;
      box-shadow: 0 0 20px rgba(0,240,255,0.5);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #00F0FF;
      font-size: 1.8rem;
      cursor: pointer;
      transition: 0.3s;
    }
    .fab-left:hover {
      transform: scale(1.1);
      box-shadow: 0 0 30px #00F0FF;
      background: #00F0FF;
      color: #0B1A30;
    }
    @media (max-width: 1024px) {
      .nav-menu { gap: 1.2rem; }
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .hamburger { display: flex; }
      .mobile-menu.show { display: flex; }
      .section-title { font-size: 1.8rem; }
    }