/* roulang page: index */
/* === DESIGN VARIABLES (Neon Game Lobby & Obsidian/Volcanic) === */
    :root {
      --primary-bg: #0B0B0B;
      --secondary-bg: #161616;
      --card-bg: #1A1A1D;
      --surface-border: rgba(255, 69, 0, 0.25);
      --accent-lava: #FF4500;
      --accent-fire: #FF0000;
      --accent-glow: #FF5722;
      --text-primary: #FFFFFF;
      --text-secondary: #CCCCCC;
      --text-muted: #9A9A9A;
      --gold: #FFD700;
      --success: #32CD32;
      --danger: #FF0000;
      --badge-hot-bg: #FF4500;
      --badge-new-bg: #00F0FF;
      --font-sans: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-xl: 24px;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
      --shadow-md: 0 8px 24px rgba(255,69,0,0.15);
      --shadow-glow: 0 0 18px rgba(255,69,0,0.35);
      --transition: all 0.25s ease;
    }

    /* === RESET & BASE === */
    *, *::before, *::after {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--primary-bg);
      color: var(--text-primary);
      line-height: 1.6;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

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

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

    a:hover, a:focus {
      color: var(--accent-glow);
      text-decoration: underline;
    }

    button, .button {
      cursor: pointer;
      transition: var(--transition);
    }

    /* === CONTAINERS & GRID === */
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.25rem;
    }

    .section-padding {
      padding: 4.5rem 0;
    }

    @media (max-width: 768px) {
      .section-padding {
        padding: 2.8rem 0;
      }
    }

    /* === TOP NAVIGATION === */
    header.site-header {
      background: rgba(11, 11, 11, 0.92);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--surface-border);
      position: sticky;
      top: 0;
      z-index: 50;
      box-shadow: 0 4px 12px rgba(0,0,0,0.6);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.85rem 0;
    }

    .logo {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--text-primary);
      letter-spacing: -0.3px;
      background: linear-gradient(135deg, #FF4500 0%, #FFD700 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      white-space: nowrap;
    }

    .logo i {
      background: none;
      -webkit-text-fill-color: var(--gold);
      margin-right: 6px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
      list-style: none;
      margin: 0;
    }

    .nav-links a {
      color: var(--text-secondary);
      font-weight: 600;
      font-size: 0.95rem;
      text-transform: uppercase;
      letter-spacing: 0.4px;
      position: relative;
      padding: 0.35rem 0;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--accent-lava);
      transition: width 0.3s ease;
    }

    .nav-links a:hover, .nav-links a:focus {
      color: #fff;
    }

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

    .nav-links a.active {
      color: #fff;
      font-weight: 700;
    }

    .nav-buttons {
      display: flex;
      align-items: center;
      gap: 0.8rem;
      margin-left: 2rem;
    }

    .btn-nav {
      font-weight: 600;
      padding: 0.5rem 1.3rem;
      border-radius: 30px;
      font-size: 0.9rem;
    }

    .btn-login {
      background: transparent;
      border: 1px solid var(--accent-lava);
      color: var(--accent-lava);
    }

    .btn-login:hover {
      background: rgba(255,69,0,0.15);
      color: #fff;
    }

    .btn-signup {
      background: var(--accent-lava);
      color: #fff;
      border: 1px solid var(--accent-lava);
      box-shadow: var(--shadow-glow);
    }

    .btn-signup:hover {
      background: #ff5722;
      box-shadow: 0 0 24px rgba(255,69,0,0.55);
      color: #fff;
    }

    .hamburger {
      display: none;
      background: transparent;
      border: none;
      color: #fff;
      font-size: 1.8rem;
    }

    @media (max-width: 1024px) {
      .nav-links, .nav-buttons {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .header-inner {
        justify-content: space-between;
      }
    }

    /* === HERO (Full-width shallow banner) === */
    .hero-section {
      background: linear-gradient(180deg, #0B0B0B 0%, #1A120B 100%);
      padding: 3rem 0 2.5rem;
      border-bottom: 1px solid var(--surface-border);
    }

    .hero-flex {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 2rem;
      flex-wrap: wrap;
    }

    .hero-content h1 {
      font-size: 2.6rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 1rem;
      background: linear-gradient(to right, #fff, #FFD700);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-content p {
      font-size: 1.15rem;
      color: var(--text-secondary);
      max-width: 620px;
      margin-bottom: 1.8rem;
    }

    .hero-badges {
      display: flex;
      gap: 1.5rem;
      flex-wrap: wrap;
      align-items: center;
    }

    .badge-item {
      background: rgba(255,69,0,0.15);
      border-left: 3px solid var(--accent-lava);
      padding: 0.5rem 1.2rem;
      border-radius: var(--radius-sm);
      font-weight: 600;
      color: var(--text-primary);
    }

    @media (max-width: 768px) {
      .hero-content h1 {
        font-size: 2rem;
      }
    }

    /* === ENTRY MATRIX (Grid icons) === */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 1.8rem;
      margin-top: 1.5rem;
    }

    .matrix-item {
      background: var(--card-bg);
      border: 1px solid var(--surface-border);
      border-radius: var(--radius-lg);
      padding: 1.8rem 1rem;
      text-align: center;
      transition: var(--transition);
    }

    .matrix-item:hover {
      transform: translateY(-5px);
      border-color: var(--accent-lava);
      box-shadow: var(--shadow-md);
    }

    .matrix-item i {
      font-size: 2.4rem;
      color: var(--accent-lava);
      margin-bottom: 0.8rem;
    }

    /* === TIMELINE === */
    .timeline-track {
      position: relative;
      padding-left: 2rem;
      border-left: 2px solid var(--accent-lava);
    }

    .timeline-node {
      position: relative;
      margin-bottom: 2rem;
      background: var(--card-bg);
      border-radius: var(--radius-md);
      padding: 1.2rem 1.5rem;
    }

    .timeline-node::before {
      content: '';
      position: absolute;
      left: -2.45rem;
      top: 1.2rem;
      width: 14px;
      height: 14px;
      background: var(--accent-lava);
      border-radius: 50%;
      box-shadow: 0 0 12px var(--accent-lava);
    }

    /* === CMS LIST (Latest News) === */
    .news-grid {
      display: flex;
      gap: 2rem;
      flex-wrap: wrap;
    }

    .news-list {
      flex: 2;
      min-width: 280px;
    }

    .news-item {
      border-bottom: 1px solid rgba(255,255,255,0.1);
      padding: 1rem 0;
      display: flex;
      gap: 1rem;
    }

    .news-item a {
      font-weight: 700;
      font-size: 1.05rem;
    }

    .news-meta {
      color: var(--text-muted);
      font-size: 0.8rem;
    }

    .news-sidebar {
      flex: 1;
      background: var(--card-bg);
      padding: 1.5rem;
      border-radius: var(--radius-lg);
    }

    /* === CARDS / TRACK === */
    .game-track {
      display: flex;
      gap: 1.2rem;
      overflow-x: auto;
      padding: 1rem 0;
      scrollbar-width: thin;
    }

    .game-card {
      min-width: 180px;
      background: var(--card-bg);
      border-radius: var(--radius-md);
      padding: 1rem;
      position: relative;
      border: 1px solid transparent;
      transition: var(--transition);
    }

    .game-card:hover {
      border-color: var(--accent-lava);
      transform: translateY(-4px);
    }

    .game-card img {
      border-radius: var(--radius-sm);
    }

    .hot-tag {
      position: absolute;
      top: 8px;
      right: 8px;
      background: var(--badge-hot-bg);
      color: #fff;
      font-size: 0.7rem;
      font-weight: bold;
      padding: 0.2rem 0.6rem;
      border-radius: 20px;
    }

    /* === FOOTER === */
    footer.site-footer {
      background: #0A0A0A;
      border-top: 1px solid var(--surface-border);
      padding: 2.5rem 0 1.5rem;
      color: var(--text-muted);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 2rem;
    }

    /* === FAB === */
    .fab-left {
      position: fixed;
      left: 1.5rem;
      bottom: 6rem;
      background: rgba(0,0,0,0.7);
      backdrop-filter: blur(8px);
      width: 54px;
      height: 54px;
      border-radius: 30px;
      border: 2px solid var(--accent-lava);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      box-shadow: 0 0 20px rgba(255,69,0,0.45);
      transition: 0.3s;
      z-index: 40;
    }

    .fab-left:hover {
      transform: scale(1.08);
      box-shadow: 0 0 28px #FF4500;
    }

    /* FOUNDATION overrides */
    .callout {
      background: var(--card-bg);
      color: #fff;
      border: 1px solid var(--surface-border);
    }

/* roulang page: category1 */
:root {
            --primary-bg: #0B0B0B;
            --secondary-bg: #161616;
            --card-bg: #1A1A1D;
            --surface-border: rgba(255, 69, 0, 0.25);
            --accent-lava: #FF4500;
            --accent-fire: #FF0000;
            --accent-glow: #FF5722;
            --text-primary: #FFFFFF;
            --text-secondary: #CCCCCC;
            --text-muted: #9A9A9A;
            --gold: #FFD700;
            --success: #32CD32;
            --danger: #FF0000;
            --badge-hot-bg: #FF4500;
            --badge-new-bg: #00F0FF;
            --font-sans: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
            --shadow-md: 0 8px 24px rgba(255,69,0,0.15);
            --shadow-glow: 0 0 18px rgba(255,69,0,0.35);
            --transition: all 0.25s ease;
            --dark-overlay: rgba(0,0,0,0.65);
        }

        html {
            scroll-behavior: smooth;
            box-sizing: border-box;
        }
        *, *:before, *:after {
            box-sizing: inherit;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.65;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent-lava);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover, a:focus {
            color: var(--accent-glow);
            text-decoration: none;
        }
        button, .button {
            cursor: pointer;
            transition: var(--transition);
        }
        h1, h2, h3, h4, h5, h6 {
            color: var(--text-primary);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 0.75rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-secondary);
        }

        /* Container */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Header */
        header.site-header {
            background: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--surface-border);
            position: sticky;
            top: 0;
            z-index: 50;
            box-shadow: 0 4px 12px rgba(0,0,0,0.6);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.85rem 0;
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            background: linear-gradient(135deg, #FF4500 0%, #FFD700 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
        }
        .logo i {
            background: none;
            -webkit-text-fill-color: var(--gold);
            margin-right: 6px;
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
            margin: 0;
        }
        .nav-links a {
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            text-transform: uppercase;
            letter-spacing: 0.4px;
            position: relative;
            padding: 0.35rem 0;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0%;
            height: 2px;
            background: var(--accent-lava);
            transition: width 0.3s ease;
        }
        .nav-links a:hover, .nav-links a:focus {
            color: #fff;
        }
        .nav-links a:hover::after, .nav-links a.active::after {
            width: 100%;
        }
        .nav-links a.active {
            color: #fff;
            font-weight: 700;
        }
        .nav-buttons {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            margin-left: 2rem;
        }
        .btn-nav {
            font-weight: 600;
            padding: 0.5rem 1.3rem;
            border-radius: 30px;
            font-size: 0.9rem;
            white-space: nowrap;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-lava);
            color: var(--accent-lava);
        }
        .btn-login:hover {
            background: rgba(255,69,0,0.15);
            color: #fff;
        }
        .btn-signup {
            background: var(--accent-lava);
            color: #fff;
            border: 1px solid var(--accent-lava);
            box-shadow: var(--shadow-glow);
        }
        .btn-signup:hover {
            background: #ff5722;
            box-shadow: 0 0 24px rgba(255,69,0,0.55);
            color: #fff;
        }
        .hamburger {
            display: none;
            background: transparent;
            border: none;
            color: #fff;
            font-size: 1.8rem;
        }

        /* Buttons */
        .btn-primary {
            display: inline-block;
            background: var(--accent-lava);
            color: #fff;
            font-weight: 700;
            padding: 0.8rem 2.2rem;
            border-radius: 30px;
            border: none;
            box-shadow: var(--shadow-glow);
            font-size: 1rem;
            text-align: center;
            letter-spacing: 0.3px;
        }
        .btn-primary:hover {
            background: #ff5722;
            box-shadow: 0 0 28px rgba(255,69,0,0.6);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline {
            display: inline-block;
            background: transparent;
            border: 1px solid var(--accent-lava);
            color: var(--accent-lava);
            font-weight: 600;
            padding: 0.7rem 1.8rem;
            border-radius: 30px;
            font-size: 0.95rem;
        }
        .btn-outline:hover {
            background: rgba(255,69,0,0.15);
            color: #fff;
        }

        /* Section */
        .section-padding {
            padding: 4rem 0;
        }
        .section-dark {
            background: var(--secondary-bg);
        }

        /* Hero */
        .hero-banner {
            background: linear-gradient(180deg, #0B0B0B 0%, #1A120B 100%);
            border-bottom: 1px solid var(--surface-border);
            padding: 3rem 0;
            position: relative;
            overflow: hidden;
        }
        .hero-flex {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 2.5rem;
            flex-wrap: wrap;
        }
        .hero-content h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1rem;
            background: linear-gradient(to right, #fff, #FFD700);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-content p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 620px;
            margin-bottom: 1.8rem;
        }
        .countdown-timer {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.8rem;
            flex-wrap: wrap;
        }
        .countdown-item {
            background: var(--card-bg);
            border: 1px solid var(--accent-lava);
            padding: 0.6rem 1.2rem;
            border-radius: var(--radius-md);
            text-align: center;
            min-width: 60px;
        }
        .countdown-item span {
            display: block;
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-lava);
        }
        .hero-card-preview {
            background: var(--card-bg);
            border: 1px solid var(--surface-border);
            border-radius: var(--radius-lg);
            padding: 1.2rem;
            max-width: 300px;
            width: 100%;
            text-align: center;
            box-shadow: var(--shadow-md);
        }
        .hero-card-preview img {
            border-radius: var(--radius-md);
            margin-bottom: 0.8rem;
            width: 100%;
            height: auto;
        }

        /* Stats Badges */
        .stats-row {
            display: flex;
            gap: 2rem;
            flex-wrap: wrap;
            margin: 1.5rem 0;
        }
        .stat-item {
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .stat-item i {
            font-size: 2rem;
            color: var(--accent-lava);
        }
        .stat-item strong {
            font-size: 1.8rem;
            color: var(--gold);
        }
        .stat-item small {
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        /* Card Grid */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.8rem;
            margin-top: 2rem;
        }
        .app-card {
            background: var(--card-bg);
            border: 1px solid var(--surface-border);
            border-radius: var(--radius-lg);
            padding: 1.8rem;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            position: relative;
            overflow: hidden;
        }
        .app-card:hover {
            border-color: var(--accent-lava);
            box-shadow: 0 0 22px rgba(255,69,0,0.2);
            transform: translateY(-4px);
        }
        .app-card .badge {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: var(--badge-hot-bg);
            color: #fff;
            font-size: 0.7rem;
            font-weight: bold;
            padding: 0.2rem 0.7rem;
            border-radius: var(--radius-sm);
            text-transform: uppercase;
        }
        .app-card img {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            margin-bottom: 1rem;
            object-fit: cover;
            border: 2px solid var(--surface-border);
        }
        .app-card h3 {
            font-size: 1.4rem;
            margin-bottom: 0.5rem;
        }
        .app-card .code-highlight {
            background: rgba(255,215,0,0.15);
            color: var(--gold);
            font-weight: 700;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            display: inline-block;
            margin: 0.5rem 0;
            font-size: 0.9rem;
        }

        /* Process Steps */
        .steps-vertical {
            display: flex;
            flex-direction: column;
            gap: 2rem;
            max-width: 800px;
            margin: 2rem auto 0;
        }
        .step-item {
            display: flex;
            gap: 1.5rem;
            align-items: flex-start;
        }
        .step-num {
            width: 50px;
            height: 50px;
            background: var(--accent-lava);
            color: #fff;
            font-weight: 800;
            font-size: 1.6rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            flex-shrink: 0;
            box-shadow: var(--shadow-glow);
        }
        .step-content h4 {
            margin-bottom: 0.3rem;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 2rem auto 0;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--surface-border);
            border-radius: var(--radius-md);
            margin-bottom: 1rem;
            padding: 1.3rem 1.5rem;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--accent-lava);
        }
        .faq-item h4 {
            margin-bottom: 0.4rem;
            font-size: 1.1rem;
        }
        .faq-item p {
            margin: 0;
            color: var(--text-muted);
        }

        /* Footer */
        footer.site-footer {
            background: #0A0A0A;
            border-top: 1px solid var(--surface-border);
            padding: 2.5rem 0 1.5rem;
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .footer-grid {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 2rem;
        }
        .footer-grid a {
            color: var(--text-muted);
        }
        .footer-grid a:hover {
            color: var(--accent-lava);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links { gap: 1rem; }
            .hero-content h1 { font-size: 2rem; }
            .card-grid { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
        }
        @media (max-width: 768px) {
            .nav-links, .nav-buttons { display: none; }
            .hamburger { display: block; }
            .header-inner { justify-content: space-between; }
            .hero-flex { flex-direction: column; align-items: flex-start; }
            .hero-card-preview { max-width: 100%; }
            .footer-grid { flex-direction: column; }
        }

/* roulang page: article */
:root {
      --primary-bg: #0B0B0B;
      --secondary-bg: #161616;
      --card-bg: #1A1A1D;
      --surface-border: rgba(255, 69, 0, 0.25);
      --accent-lava: #FF4500;
      --accent-fire: #FF0000;
      --accent-glow: #FF5722;
      --text-primary: #FFFFFF;
      --text-secondary: #CCCCCC;
      --text-muted: #9A9A9A;
      --gold: #FFD700;
      --success: #32CD32;
      --danger: #FF0000;
      --badge-hot-bg: #FF4500;
      --badge-new-bg: #00F0FF;
      --font-sans: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-xl: 24px;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
      --shadow-md: 0 8px 24px rgba(255,69,0,0.15);
      --shadow-glow: 0 0 18px rgba(255,69,0,0.35);
      --transition: all 0.25s ease;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--primary-bg);
      color: var(--text-primary);
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

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

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

    a:hover, a:focus {
      color: var(--accent-glow);
      text-decoration: underline;
    }

    button, .button {
      cursor: pointer;
      transition: var(--transition);
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.25rem;
    }

    .section-padding {
      padding: 4.5rem 0;
    }

    header.site-header {
      background: rgba(11, 11, 11, 0.92);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--surface-border);
      position: sticky;
      top: 0;
      z-index: 50;
      box-shadow: 0 4px 12px rgba(0,0,0,0.6);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.85rem 0;
    }

    .logo {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--text-primary);
      letter-spacing: -0.3px;
      background: linear-gradient(135deg, #FF4500 0%, #FFD700 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      white-space: nowrap;
    }

    .logo i {
      background: none;
      -webkit-text-fill-color: var(--gold);
      margin-right: 6px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
      list-style: none;
      margin: 0;
    }

    .nav-links a {
      color: var(--text-secondary);
      font-weight: 600;
      font-size: 0.95rem;
      text-transform: uppercase;
      letter-spacing: 0.4px;
      position: relative;
      padding: 0.35rem 0;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--accent-lava);
      transition: width 0.3s ease;
    }

    .nav-links a:hover, .nav-links a:focus {
      color: #fff;
    }

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

    .nav-links a.active {
      color: #fff;
      font-weight: 700;
    }

    .nav-buttons {
      display: flex;
      align-items: center;
      gap: 0.8rem;
      margin-left: 2rem;
    }

    .btn-nav {
      font-weight: 600;
      padding: 0.5rem 1.3rem;
      border-radius: 30px;
      font-size: 0.9rem;
      border: none;
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
    }

    .btn-login {
      background: transparent;
      border: 1px solid var(--accent-lava);
      color: var(--accent-lava);
    }

    .btn-login:hover {
      background: rgba(255,69,0,0.15);
      color: #fff;
    }

    .btn-signup {
      background: var(--accent-lava);
      color: #fff;
      border: 1px solid var(--accent-lava);
      box-shadow: var(--shadow-glow);
    }

    .btn-signup:hover {
      background: #ff5722;
      box-shadow: 0 0 24px rgba(255,69,0,0.55);
      color: #fff;
    }

    .hamburger {
      display: none;
      background: transparent;
      border: none;
      color: #fff;
      font-size: 1.8rem;
    }

    /* Article Hero */
    .article-hero {
      background: linear-gradient(180deg, #0B0B0B 0%, #1A120B 100%);
      padding: 3rem 0 2rem;
      border-bottom: 1px solid var(--surface-border);
      position: relative;
      overflow: hidden;
    }

    .article-hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
      opacity: 0.08;
      z-index: 0;
    }

    .article-hero-content {
      position: relative;
      z-index: 1;
      display: flex;
      gap: 2.5rem;
      align-items: flex-start;
      flex-wrap: wrap;
    }

    .article-cover-panel {
      flex: 0 0 320px;
      background: var(--card-bg);
      border: 1px solid var(--surface-border);
      border-radius: var(--radius-lg);
      padding: 1.5rem;
      box-shadow: var(--shadow-md);
      position: sticky;
      top: 120px;
    }

    .article-cover-panel img {
      border-radius: var(--radius-md);
      margin-bottom: 1.25rem;
      width: 100%;
    }

    .cover-download-info {
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .cover-badge {
      background: rgba(255,69,0,0.15);
      color: var(--accent-lava);
      font-weight: 700;
      font-size: 0.85rem;
      padding: 0.5rem 1rem;
      border-radius: 30px;
      text-align: center;
      border: 1px solid var(--accent-lava);
    }

    .cover-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .cover-meta i {
      color: var(--accent-lava);
      margin-right: 4px;
    }

    .btn-download {
      background: var(--accent-lava);
      color: #fff;
      font-weight: 700;
      padding: 0.9rem 1.5rem;
      border-radius: 30px;
      font-size: 1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      box-shadow: var(--shadow-glow);
      border: none;
      width: 100%;
    }

    .btn-download:hover {
      background: #ff5722;
      color: #fff;
      box-shadow: 0 0 28px rgba(255,69,0,0.6);
    }

    .article-main {
      flex: 1;
      min-width: 0;
    }

    .article-main h1 {
      font-size: 2.4rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 1rem;
      background: linear-gradient(to right, #fff, #FFD700);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .article-meta {
      display: flex;
      gap: 2rem;
      color: var(--text-muted);
      font-size: 0.95rem;
      margin-bottom: 2rem;
      flex-wrap: wrap;
    }

    .article-body {
      background: var(--card-bg);
      border: 1px solid var(--surface-border);
      border-radius: var(--radius-lg);
      padding: 2.5rem;
      line-height: 1.7;
      color: var(--text-secondary);
    }

    .article-body h2 {
      color: #fff;
      font-size: 1.8rem;
      margin-top: 2rem;
      margin-bottom: 1rem;
    }

    .article-body h3 {
      color: var(--accent-lava);
      font-size: 1.4rem;
      margin-top: 1.5rem;
    }

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

    .article-body ul, .article-body ol {
      padding-left: 1.5rem;
      margin-bottom: 1.5rem;
    }

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

    .not-found {
      text-align: center;
      padding: 4rem 2rem;
      background: var(--card-bg);
      border-radius: var(--radius-lg);
    }

    .not-found i {
      font-size: 3rem;
      color: var(--accent-lava);
      margin-bottom: 1rem;
    }

    .not-found h2 {
      font-size: 1.8rem;
      margin-bottom: 1rem;
    }

    .not-found .btn {
      background: var(--accent-lava);
      color: #fff;
      padding: 0.8rem 2rem;
      border-radius: 30px;
      font-weight: 700;
      display: inline-block;
      margin-top: 1.5rem;
    }

    /* FAB */
    .fab {
      position: fixed;
      left: 1rem;
      bottom: 6rem;
      width: 56px;
      height: 56px;
      background: rgba(0,0,0,0.75);
      backdrop-filter: blur(8px);
      border: 2px solid var(--accent-lava);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.8rem;
      color: var(--accent-lava);
      z-index: 45;
      box-shadow: 0 0 20px rgba(255,69,0,0.45);
      transition: var(--transition);
      cursor: pointer;
      animation: float 2.5s infinite;
    }

    .fab:hover {
      transform: scale(1.1);
      box-shadow: 0 0 32px rgba(255,69,0,0.7);
      color: #fff;
      background: var(--accent-lava);
    }

    @keyframes float {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-6px); }
    }

    .fab .badge-dot {
      position: absolute;
      top: 4px;
      right: 4px;
      width: 12px;
      height: 12px;
      background: var(--danger);
      border-radius: 50%;
      border: 2px solid #000;
      animation: blink 1.4s infinite;
    }

    @keyframes blink {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.4; }
    }

    /* Footer */
    .site-footer {
      background: var(--secondary-bg);
      border-top: 1px solid var(--surface-border);
      padding: 3rem 0 2rem;
      color: var(--text-muted);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 2rem;
    }

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

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

    @media (max-width: 1024px) {
      .article-cover-panel {
        flex: 0 0 100%;
        position: static;
      }
      .article-main h1 {
        font-size: 2rem;
      }
    }

    @media (max-width: 768px) {
      .nav-links, .nav-buttons {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .header-inner {
        justify-content: space-between;
      }
      .article-hero {
        padding: 2rem 0 1.5rem;
      }
      .article-body {
        padding: 1.5rem;
      }
      .section-padding {
        padding: 2.8rem 0;
      }
    }

/* roulang page: category2 */
:root {
      --primary-bg: #0B0B0B;
      --secondary-bg: #161616;
      --card-bg: #1A1A1D;
      --surface-border: rgba(255, 69, 0, 0.25);
      --accent-lava: #FF4500;
      --accent-fire: #FF0000;
      --accent-glow: #FF5722;
      --text-primary: #FFFFFF;
      --text-secondary: #CCCCCC;
      --text-muted: #9A9A9A;
      --gold: #FFD700;
      --success: #32CD32;
      --danger: #FF0000;
      --badge-hot-bg: #FF4500;
      --badge-new-bg: #00F0FF;
      --font-sans: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-xl: 24px;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
      --shadow-md: 0 8px 24px rgba(255,69,0,0.15);
      --shadow-glow: 0 0 18px rgba(255,69,0,0.35);
      --transition: all 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--primary-bg);
      color: var(--text-primary);
      line-height: 1.6;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

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

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

    a:hover, a:focus {
      color: var(--accent-glow);
      text-decoration: none;
    }

    button, .button {
      cursor: pointer;
      transition: var(--transition);
      font-family: var(--font-sans);
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.25rem;
    }

    .section-padding {
      padding: 4.5rem 0;
    }

    header.site-header {
      background: rgba(11, 11, 11, 0.92);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--surface-border);
      position: sticky;
      top: 0;
      z-index: 50;
      box-shadow: 0 4px 12px rgba(0,0,0,0.6);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.85rem 0;
    }

    .logo {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--text-primary);
      letter-spacing: -0.3px;
      background: linear-gradient(135deg, #FF4500 0%, #FFD700 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      white-space: nowrap;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .logo i {
      background: none;
      -webkit-text-fill-color: var(--gold);
      font-size: 1.6rem;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
      list-style: none;
      margin: 0;
    }

    .nav-links a {
      color: var(--text-secondary);
      font-weight: 600;
      font-size: 0.95rem;
      text-transform: uppercase;
      letter-spacing: 0.4px;
      position: relative;
      padding: 0.35rem 0;
      white-space: nowrap;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--accent-lava);
      transition: width 0.3s ease;
    }

    .nav-links a:hover, .nav-links a:focus {
      color: #fff;
    }

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

    .nav-links a.active {
      color: #fff;
      font-weight: 700;
    }

    .nav-buttons {
      display: flex;
      align-items: center;
      gap: 0.8rem;
      margin-left: 2rem;
    }

    .btn-nav {
      font-weight: 600;
      padding: 0.5rem 1.3rem;
      border-radius: 30px;
      font-size: 0.9rem;
      border: 1px solid transparent;
      white-space: nowrap;
    }

    .btn-login {
      background: transparent;
      border: 1px solid var(--accent-lava);
      color: var(--accent-lava);
    }

    .btn-login:hover {
      background: rgba(255,69,0,0.15);
      color: #fff;
    }

    .btn-signup {
      background: var(--accent-lava);
      color: #fff;
      border: 1px solid var(--accent-lava);
      box-shadow: var(--shadow-glow);
    }

    .btn-signup:hover {
      background: #ff5722;
      box-shadow: 0 0 24px rgba(255,69,0,0.55);
      color: #fff;
    }

    .hamburger {
      display: none;
      background: transparent;
      border: none;
      color: #fff;
      font-size: 1.8rem;
    }

    .hero-category {
      background: linear-gradient(180deg, #0B0B0B 0%, #1A120B 100%);
      padding: 3.5rem 0;
      border-bottom: 1px solid var(--surface-border);
      position: relative;
      overflow: hidden;
    }

    .hero-category::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
      opacity: 0.08;
      z-index: 0;
    }

    .hero-category .container {
      position: relative;
      z-index: 1;
    }

    .hero-category h1 {
      font-size: 2.6rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 1rem;
      background: linear-gradient(to right, #fff, #FFD700);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-category p {
      font-size: 1.15rem;
      color: var(--text-secondary);
      max-width: 720px;
      margin-bottom: 1.8rem;
    }

    .hero-badges {
      display: flex;
      gap: 1.5rem;
      flex-wrap: wrap;
      align-items: center;
    }

    .badge-item {
      background: rgba(255,69,0,0.15);
      border-left: 3px solid var(--accent-lava);
      padding: 0.5rem 1.2rem;
      border-radius: var(--radius-sm);
      font-weight: 600;
      color: var(--text-primary);
    }

    .reward-progress-wrap {
      background: var(--secondary-bg);
      border: 1px solid var(--surface-border);
      border-radius: var(--radius-lg);
      padding: 2rem;
      margin-top: 2rem;
    }

    .progress-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 0.8rem;
      flex-wrap: wrap;
      gap: 0.8rem;
    }

    .progress-header span {
      font-weight: 700;
      color: var(--gold);
    }

    .progress-bar-bg {
      background: rgba(255,255,255,0.1);
      border-radius: 30px;
      height: 12px;
      width: 100%;
      overflow: hidden;
      margin-bottom: 1.2rem;
    }

    .progress-bar-fill {
      background: linear-gradient(90deg, var(--accent-lava), var(--accent-fire));
      height: 100%;
      width: 65%;
      border-radius: 30px;
      box-shadow: var(--shadow-glow);
    }

    .invite-cta {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
      align-items: center;
    }

    .btn-invite {
      background: var(--accent-lava);
      color: #fff;
      font-weight: 700;
      padding: 0.8rem 2rem;
      border-radius: 30px;
      border: none;
      font-size: 1.05rem;
      box-shadow: var(--shadow-glow);
    }

    .btn-invite:hover {
      background: #ff5722;
      box-shadow: 0 0 28px rgba(255,69,0,0.6);
    }

    .btn-copy {
      background: transparent;
      border: 1px dashed var(--gold);
      color: var(--gold);
      padding: 0.8rem 1.8rem;
      border-radius: 30px;
      font-weight: 600;
    }

    .btn-copy:hover {
      background: rgba(255,215,0,0.1);
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 1.5rem;
      background: linear-gradient(to right, #fff, #FFD700);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: inline-block;
    }

    .feature-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 2rem;
      margin-top: 2rem;
    }

    .feature-card {
      background: var(--card-bg);
      border: 1px solid var(--surface-border);
      border-radius: var(--radius-lg);
      padding: 2rem;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

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

    .feature-card i {
      font-size: 2.5rem;
      color: var(--accent-lava);
      margin-bottom: 1rem;
    }

    .feature-card h3 {
      font-weight: 700;
      margin-bottom: 0.6rem;
      font-size: 1.2rem;
    }

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

    .step-timeline {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 2rem;
      margin-top: 2.5rem;
    }

    .step-item {
      text-align: left;
      padding: 1.5rem;
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      border: 1px solid var(--surface-border);
      position: relative;
    }

    .step-num {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--accent-lava);
      opacity: 0.3;
      position: absolute;
      top: 0.5rem;
      right: 1rem;
    }

    .step-item h4 {
      font-weight: 700;
      margin-bottom: 0.5rem;
    }

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

    .app-download-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
    }

    .app-mockup {
      background: var(--card-bg);
      border-radius: var(--radius-xl);
      padding: 2rem;
      text-align: center;
      border: 2px solid var(--surface-border);
    }

    .app-mockup img {
      border-radius: var(--radius-md);
      width: 100%;
      max-width: 320px;
      margin: 0 auto;
    }

    .download-buttons {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
      margin-top: 1.5rem;
    }

    .btn-download {
      background: var(--secondary-bg);
      border: 2px solid var(--accent-lava);
      color: #fff;
      font-weight: 700;
      padding: 0.9rem 2rem;
      border-radius: 30px;
      font-size: 1rem;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .btn-download:hover {
      background: var(--accent-lava);
      box-shadow: var(--shadow-glow);
      color: #fff;
    }

    .faq-list {
      max-width: 800px;
      margin: 2rem auto 0;
    }

    .faq-item {
      background: var(--card-bg);
      border: 1px solid var(--surface-border);
      border-radius: var(--radius-md);
      padding: 1.5rem;
      margin-bottom: 1rem;
      transition: var(--transition);
    }

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

    .faq-item h4 {
      font-weight: 700;
      margin-bottom: 0.4rem;
      color: var(--gold);
    }

    .faq-item p {
      color: var(--text-secondary);
    }

    .cta-section {
      background: linear-gradient(180deg, #1A120B 0%, #0B0B0B 100%);
      border-top: 1px solid var(--surface-border);
      border-bottom: 1px solid var(--surface-border);
      text-align: center;
    }

    .cta-section .section-title {
      margin-bottom: 0.8rem;
    }

    .cta-section p {
      color: var(--text-secondary);
      max-width: 600px;
      margin: 0 auto 2rem;
    }

    .btn-cta-large {
      background: var(--accent-lava);
      color: #fff;
      font-weight: 800;
      padding: 1rem 3rem;
      border-radius: 40px;
      font-size: 1.2rem;
      border: none;
      box-shadow: var(--shadow-glow);
    }

    .btn-cta-large:hover {
      background: #ff5722;
      box-shadow: 0 0 32px rgba(255,69,0,0.7);
    }

    .site-footer {
      background: #0A0A0A;
      border-top: 1px solid var(--surface-border);
      padding: 2.5rem 0 1.8rem;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 2rem;
    }

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

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

    .fab-left {
      position: fixed;
      left: 1.5rem;
      bottom: 6rem;
      z-index: 50;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: rgba(11,11,11,0.85);
      backdrop-filter: blur(10px);
      border: 2px solid var(--accent-lava);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent-lava);
      font-size: 1.6rem;
      box-shadow: 0 0 20px rgba(255,69,0,0.35);
      transition: var(--transition);
      cursor: pointer;
    }

    .fab-left:hover {
      transform: scale(1.1);
      box-shadow: 0 0 30px rgba(255,69,0,0.6);
      color: #fff;
      background: var(--accent-lava);
    }

    @media (max-width: 1024px) {
      .hero-category h1 {
        font-size: 2rem;
      }
      .app-download-grid {
        grid-template-columns: 1fr;
      }
      .nav-links, .nav-buttons {
        display: none;
      }
      .hamburger {
        display: block;
      }
    }

    @media (max-width: 768px) {
      .section-padding {
        padding: 2.8rem 0;
      }
      .hero-category h1 {
        font-size: 1.8rem;
      }
      .hero-category p {
        font-size: 1rem;
      }
      .section-title {
        font-size: 1.6rem;
      }
      .feature-grid,
      .step-timeline {
        grid-template-columns: 1fr;
      }
      .hero-badges {
        gap: 0.8rem;
      }
      .nav-links, .nav-buttons {
        display: none;
      }
      .hamburger {
        display: block;
      }
    }

/* roulang page: category3 */
/* === DESIGN VARIABLES (Volcanic Magma & Obsidian - Style G) === */
    :root {
      --primary-bg: #0B0B0B;
      --secondary-bg: #161616;
      --card-bg: #1A1A1D;
      --surface-border: rgba(255, 69, 0, 0.25);
      --accent-lava: #FF4500;
      --accent-fire: #FF0000;
      --accent-glow: #FF5722;
      --text-primary: #FFFFFF;
      --text-secondary: #CCCCCC;
      --text-muted: #9A9A9A;
      --gold: #FFD700;
      --success: #32CD32;
      --danger: #FF0000;
      --badge-hot-bg: #FF4500;
      --badge-new-bg: #00F0FF;
      --font-sans: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-xl: 24px;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
      --shadow-md: 0 8px 24px rgba(255,69,0,0.15);
      --shadow-glow: 0 0 18px rgba(255,69,0,0.35);
      --shadow-hover: 0 12px 32px rgba(255,69,0,0.25);
      --transition: all 0.25s ease;
    }
    
    /* === BASE RESET === */
    *, *::before, *::after {
      box-sizing: border-box;
    }
    
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--primary-bg);
      color: var(--text-primary);
      line-height: 1.65;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    a {
      color: var(--accent-lava);
      text-decoration: none;
      transition: var(--transition);
    }
    
    a:hover, a:focus {
      color: var(--accent-glow);
      text-decoration: none;
    }
    
    button, .button {
      cursor: pointer;
      transition: var(--transition);
      font-family: var(--font-sans);
    }
    
    h1, h2, h3, h4, h5, h6 {
      color: var(--text-primary);
      line-height: 1.3;
      margin-bottom: 0.75rem;
    }
    
    h1 { font-size: 2.6rem; font-weight: 800; }
    h2 { font-size: 2rem; font-weight: 700; }
    h3 { font-size: 1.55rem; font-weight: 700; }
    h4 { font-size: 1.25rem; font-weight: 600; }
    
    p {
      color: var(--text-secondary);
      margin-bottom: 1.2rem;
      line-height: 1.7;
    }
    
    ul, ol {
      color: var(--text-secondary);
      padding-left: 1.5rem;
      margin-bottom: 1.2rem;
    }
    
    li {
      margin-bottom: 0.5rem;
    }
    
    /* === CONTAINER === */
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.25rem;
    }
    
    /* === SECTION SPACING === */
    .section-padding {
      padding: 4.5rem 0;
    }
    
    /* === TOP NAVIGATION (Global) === */
    header.site-header {
      background: rgba(11, 11, 11, 0.95);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--surface-border);
      position: sticky;
      top: 0;
      z-index: 50;
      box-shadow: 0 4px 16px rgba(0,0,0,0.7);
    }
    
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.9rem 0;
      flex-wrap: wrap;
    }
    
    .logo {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--text-primary);
      letter-spacing: -0.3px;
      background: linear-gradient(135deg, #FF4500 0%, #FFD700 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      white-space: nowrap;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    
    .logo i {
      background: none;
      -webkit-text-fill-color: var(--gold);
      font-size: 1.5rem;
    }
    
    nav {
      display: flex;
      align-items: center;
      gap: 1.5rem;
    }
    
    .nav-links {
      display: flex;
      align-items: center;
      gap: 1.8rem;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    
    .nav-links a {
      color: var(--text-secondary);
      font-weight: 600;
      font-size: 0.92rem;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      position: relative;
      padding: 0.35rem 0;
      transition: var(--transition);
    }
    
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--accent-lava);
      transition: width 0.3s ease;
    }
    
    .nav-links a:hover, .nav-links a:focus {
      color: #fff;
      text-decoration: none;
    }
    
    .nav-links a:hover::after, .nav-links a.active::after {
      width: 100%;
    }
    
    .nav-links a.active {
      color: #fff;
      font-weight: 700;
    }
    
    .nav-buttons {
      display: flex;
      align-items: center;
      gap: 0.8rem;
      margin-left: 1.5rem;
    }
    
    .btn-nav {
      font-weight: 600;
      padding: 0.55rem 1.4rem;
      border-radius: 30px;
      font-size: 0.9rem;
      border: none;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      white-space: nowrap;
    }
    
    .btn-login {
      background: transparent;
      border: 1px solid var(--accent-lava);
      color: var(--accent-lava);
    }
    
    .btn-login:hover {
      background: rgba(255,69,0,0.15);
      color: #fff;
      transform: translateY(-1px);
    }
    
    .btn-signup {
      background: var(--accent-lava);
      color: #fff;
      border: 1px solid var(--accent-lava);
      box-shadow: var(--shadow-glow);
    }
    
    .btn-signup:hover {
      background: #ff5722;
      box-shadow: 0 0 28px rgba(255,69,0,0.6);
      color: #fff;
      transform: translateY(-1px);
    }
    
    .hamburger {
      display: none;
      background: transparent;
      border: none;
      color: #fff;
      font-size: 1.8rem;
      cursor: pointer;
      padding: 0.3rem;
    }
    
    /* === HERO SECTION === */
    .hero-section {
      background: linear-gradient(180deg, #0B0B0B 0%, #1A120B 100%);
      padding: 4rem 0 3rem;
      border-bottom: 1px solid var(--surface-border);
      position: relative;
      overflow: hidden;
    }
    
    .hero-section::before {
      content: '';
      position: absolute;
      top: -50%;
      right: -20%;
      width: 600px;
      height: 600px;
      background: radial-gradient(circle, rgba(255,69,0,0.08) 0%, transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }
    
    .hero-flex {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 3rem;
      flex-wrap: wrap;
      position: relative;
      z-index: 2;
    }
    
    .hero-content {
      flex: 1;
      min-width: 300px;
    }
    
    .hero-content h1 {
      font-size: 2.6rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 1.2rem;
      background: linear-gradient(to right, #fff, #FFD700);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    
    .hero-content p {
      font-size: 1.15rem;
      color: var(--text-secondary);
      max-width: 600px;
      margin-bottom: 2rem;
      line-height: 1.7;
    }
    
    .hero-visual {
      flex: 0 0 380px;
      background: var(--card-bg);
      border: 1px solid var(--surface-border);
      border-radius: var(--radius-xl);
      padding: 2rem;
      box-shadow: var(--shadow-md);
    }
    
    .progress-steps {
      display: flex;
      flex-direction: column;
      gap: 1.2rem;
    }
    
    .progress-step {
      display: flex;
      align-items: center;
      gap: 1rem;
      padding: 0.8rem 1rem;
      background: rgba(255,69,0,0.08);
      border-radius: var(--radius-md);
      border-left: 3px solid var(--accent-lava);
      transition: var(--transition);
    }
    
    .progress-step:hover {
      background: rgba(255,69,0,0.15);
      transform: translateX(4px);
    }
    
    .progress-step i {
      color: var(--accent-lava);
      font-size: 1.4rem;
      width: 32px;
      text-align: center;
    }
    
    .progress-step span {
      font-weight: 600;
      color: var(--text-primary);
    }
    
    .hero-cta {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }
    
    .btn-primary {
      background: var(--accent-lava);
      color: #fff;
      border: none;
      padding: 0.85rem 2.2rem;
      border-radius: 30px;
      font-weight: 700;
      font-size: 1rem;
      box-shadow: var(--shadow-glow);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: var(--transition);
    }
    
    .btn-primary:hover {
      background: #ff5722;
      box-shadow: 0 0 32px rgba(255,69,0,0.6);
      transform: translateY(-2px);
      color: #fff;
    }
    
    .btn-secondary {
      background: transparent;
      border: 2px solid var(--gold);
      color: var(--gold);
      padding: 0.85rem 2.2rem;
      border-radius: 30px;
      font-weight: 700;
      font-size: 1rem;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: var(--transition);
    }
    
    .btn-secondary:hover {
      background: rgba(255,215,0,0.1);
      border-color: #ffe88c;
      color: #ffe88c;
      text-decoration: none;
    }
    
    /* === SECTION HEADINGS === */
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 0.5rem;
      text-align: left;
      position: relative;
    }
    
    .section-title::after {
      content: '';
      display: block;
      width: 60px;
      height: 3px;
      background: var(--accent-lava);
      margin-top: 0.5rem;
      border-radius: 2px;
    }
    
    .section-subtitle {
      color: var(--text-muted);
      font-size: 1.1rem;
      margin-bottom: 2.5rem;
      text-align: left;
    }
    
    /* === STEP GUIDE TIMELINE === */
    .step-guide-section {
      background: var(--secondary-bg);
      border-top: 1px solid var(--surface-border);
      border-bottom: 1px solid var(--surface-border);
    }
    
    .step-grid {
      display: flex;
      flex-direction: column;
      gap: 2rem;
      margin-top: 2rem;
    }
    
    .step-card {
      display: flex;
      gap: 1.8rem;
      align-items: flex-start;
      background: var(--card-bg);
      border: 1px solid var(--surface-border);
      border-radius: var(--radius-lg);
      padding: 2rem;
      transition: var(--transition);
      position: relative;
    }
    
    .step-card:hover {
      border-color: var(--accent-lava);
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
    }
    
    .step-number {
      flex: 0 0 60px;
      height: 60px;
      background: linear-gradient(135deg, var(--accent-lava), var(--accent-fire));
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      font-weight: 800;
      color: #fff;
      box-shadow: 0 0 16px rgba(255,69,0,0.4);
    }
    
    .step-body {
      flex: 1;
    }
    
    .step-body h3 {
      margin-bottom: 0.5rem;
      color: var(--text-primary);
    }
    
    .step-body p {
      color: var(--text-secondary);
      margin-bottom: 0.8rem;
    }
    
    .step-body ul {
      color: var(--text-muted);
    }
    
    .step-body .badge {
      display: inline-block;
      background: var(--badge-hot-bg);
      color: #fff;
      padding: 0.25rem 0.8rem;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 700;
      margin-top: 0.5rem;
    }
    
    /* === TIPS SECTION === */
    .tips-section {
      background: var(--primary-bg);
    }
    
    .tips-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 2rem;
      margin-top: 2rem;
    }
    
    .tip-card {
      background: var(--card-bg);
      border: 1px solid var(--surface-border);
      border-radius: var(--radius-lg);
      padding: 1.8rem;
      transition: var(--transition);
    }
    
    .tip-card:hover {
      border-color: var(--accent-lava);
      box-shadow: var(--shadow-md);
    }
    
    .tip-icon {
      font-size: 2.5rem;
      color: var(--accent-lava);
      margin-bottom: 1rem;
    }
    
    .tip-card h4 {
      font-weight: 700;
      margin-bottom: 0.6rem;
    }
    
    .tip-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.65;
    }
    
    /* === PORTAL SHOWCASE === */
    .portal-showcase {
      background: var(--secondary-bg);
    }
    
    .portal-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 1.8rem;
      margin-top: 2rem;
    }
    
    .portal-card {
      background: var(--card-bg);
      border: 1px solid var(--surface-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: var(--transition);
    }
    
    .portal-card:hover {
      border-color: var(--accent-lava);
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    
    .portal-card img {
      width: 100%;
      height: 160px;
      object-fit: cover;
    }
    
    .portal-info {
      padding: 1.2rem;
    }
    
    .portal-info h4 {
      font-weight: 700;
      margin-bottom: 0.3rem;
    }
    
    .portal-info .code-value {
      color: var(--gold);
      font-weight: 700;
      font-size: 1.1rem;
    }
    
    .portal-info p {
      color: var(--text-muted);
      font-size: 0.9rem;
      margin-bottom: 0.5rem;
    }
    
    .tag-hot, .tag-new {
      display: inline-block;
      padding: 0.2rem 0.7rem;
      border-radius: 12px;
      font-size: 0.75rem;
      font-weight: 700;
      color: #fff;
    }
    
    .tag-hot { background: var(--badge-hot-bg); }
    .tag-new { background: var(--badge-new-bg); color: #000; }
    
    /* === FAQ SECTION === */
    .faq-section {
      background: var(--primary-bg);
    }
    
    .faq-list {
      max-width: 800px;
      margin: 2rem auto 0;
      display: flex;
      flex-direction: column;
      gap: 1.2rem;
    }
    
    .faq-item {
      background: var(--card-bg);
      border: 1px solid var(--surface-border);
      border-radius: var(--radius-md);
      padding: 1.5rem;
      transition: var(--transition);
    }
    
    .faq-item:hover {
      border-color: var(--accent-lava);
    }
    
    .faq-item h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 0.5rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    
    .faq-item h3 i {
      transition: transform 0.3s ease;
      color: var(--accent-lava);
    }
    
    .faq-item p {
      color: var(--text-muted);
      margin-bottom: 0;
    }
    
    /* === CTA SECTION === */
    .cta-section {
      background: linear-gradient(180deg, var(--secondary-bg) 0%, #1A120B 100%);
      border-top: 2px solid var(--accent-lava);
      border-bottom: 1px solid var(--surface-border);
    }
    
    .cta-content {
      text-align: center;
    }
    
    .cta-content h2 {
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 1rem;
    }
    
    .cta-content p {
      color: var(--text-secondary);
      max-width: 600px;
      margin: 0 auto 2rem;
    }
    
    .cta-btn-group {
      display: flex;
      gap: 1.2rem;
      justify-content: center;
      flex-wrap: wrap;
    }
    
    /* === FOOTER (Global) === */
    footer.site-footer {
      background: #060606;
      border-top: 1px solid var(--surface-border);
      padding: 2.5rem 0;
      font-size: 0.9rem;
    }
    
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 2rem;
    }
    
    .footer-grid a {
      color: var(--text-muted);
      display: block;
      margin-bottom: 0.4rem;
    }
    
    .footer-grid a:hover {
      color: #fff;
    }
    
    footer p {
      color: var(--text-muted);
      margin-bottom: 0.4rem;
    }
    
    /* === RESPONSIVE === */
    @media screen and (max-width: 1024px) {
      .hero-visual {
        flex: 0 0 320px;
      }
      .hero-content h1 {
        font-size: 2.2rem;
      }
    }
    
    @media screen and (max-width: 768px) {
      .nav-links, .nav-buttons {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .hero-flex {
        flex-direction: column;
        gap: 2rem;
      }
      .hero-visual {
        flex: 1 1 auto;
        width: 100%;
      }
      .hero-content h1 {
        font-size: 1.9rem;
      }
      .section-title {
        font-size: 1.6rem;
      }
      .step-card {
        flex-direction: column;
        gap: 1rem;
      }
      .step-number {
        flex: 0 0 48px;
        height: 48px;
        font-size: 1.3rem;
      }
      h2 { font-size: 1.6rem; }
      h3 { font-size: 1.3rem; }
      .section-padding {
        padding: 2.5rem 0;
      }
    }
    
    @media screen and (max-width: 520px) {
      .hero-content h1 {
        font-size: 1.6rem;
      }
      .hero-content p {
        font-size: 0.95rem;
      }
      .btn-primary, .btn-secondary {
        padding: 0.7rem 1.5rem;
        font-size: 0.9rem;
      }
      .hero-cta {
        flex-direction: column;
        gap: 0.8rem;
      }
      .tips-grid, .portal-grid {
        grid-template-columns: 1fr;
      }
      .section-title {
        font-size: 1.4rem;
      }
      .container {
        padding: 0 1rem;
      }
    }