/* roulang page: index */
:root {
      --bg-stadium: #0A0F1D;
      --bg-surface: #121829;
      --bg-panel: #182035;
      --bg-panel-hover: #1f2a44;
      --primary-electric: #00F59B;
      --primary-glow: rgba(0, 245, 155, 0.35);
      --accent-red: #FF3B30;
      --accent-gold: #FFB800;
      --text-white: #FFFFFF;
      --text-muted: #A0AEC0;
      --text-sub: #64748B;
      --border-panel: rgba(255, 255, 255, 0.08);
      --border-active: rgba(0, 245, 155, 0.35);
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

    /* Reset & Base */
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      background-color: var(--bg-stadium);
      color: var(--text-white);
      font-family: var(--font-stack);
      line-height: 1.65;
      font-size: 15px;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--text-muted);
      text-decoration: none;
      transition: all 0.25s ease;
    }

    a:hover, a:focus {
      color: var(--primary-electric);
    }

    /* Top Live Bar */
    .top-match-ticker {
      background: #060912;
      border-bottom: 1px solid rgba(0, 245, 155, 0.15);
      font-size: 12px;
      padding: 6px 0;
      color: var(--text-muted);
    }
    .live-dot {
      display: inline-block;
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--primary-electric);
      box-shadow: 0 0 8px var(--primary-electric);
      margin-right: 6px;
      animation: pulse 1.5s infinite;
    }
    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.85); }
    }

    /* Global Navigation */
    .site-header {
      background: rgba(10, 15, 29, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-panel);
      position: sticky;
      top: 0;
      z-index: 1000;
    }

    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }

    .nav-wing {
      display: flex;
      align-items: center;
      gap: 28px;
      flex: 1;
    }
    .nav-wing.wing-right {
      justify-content: flex-end;
    }

    .nav-link-item {
      font-size: 14px;
      font-weight: 600;
      letter-spacing: 0.5px;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }
    .nav-link-item:hover, .nav-link-item.is-active {
      color: var(--primary-electric);
    }
    .nav-link-item.is-active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary-electric);
      box-shadow: 0 0 8px var(--primary-electric);
    }

    .nav-center-brand {
      flex: 0 0 auto;
      padding: 0 32px;
      text-align: center;
    }
    .brand-title {
      font-size: 22px;
      font-weight: 800;
      color: var(--text-white);
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 8px;
      line-height: 1;
    }
    .brand-title span {
      color: var(--primary-electric);
      text-shadow: 0 0 10px rgba(0, 245, 155, 0.4);
    }
    .brand-tagline {
      font-size: 11px;
      color: var(--text-sub);
      letter-spacing: 1.5px;
      text-transform: uppercase;
      margin-top: 3px;
    }

    /* Skew Buttons */
    .btn-skew {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--primary-electric);
      color: #041009 !important;
      font-weight: 700;
      font-size: 13px;
      padding: 10px 22px;
      clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
      transition: all 0.25s ease;
      position: relative;
      cursor: pointer;
      border: none;
    }
    .btn-skew:hover {
      box-shadow: 0 0 24px rgba(0, 245, 155, 0.6);
      transform: translateY(-2px);
    }
    .btn-skew-alt {
      background: transparent;
      color: var(--text-white) !important;
      border: 1px solid var(--border-active);
      clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
    }
    .btn-skew-alt:hover {
      background: rgba(0, 245, 155, 0.1);
      border-color: var(--primary-electric);
      color: var(--primary-electric) !important;
    }

    /* Sections Shared */
    .app-section {
      padding: 72px 0;
      position: relative;
      border-bottom: 1px solid var(--border-panel);
    }
    .section-header-wrap {
      margin-bottom: 44px;
    }
    .section-pill {
      display: inline-block;
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 1.5px;
      padding: 4px 12px;
      background: rgba(0, 245, 155, 0.12);
      border: 1px solid rgba(0, 245, 155, 0.3);
      color: var(--primary-electric);
      margin-bottom: 12px;
      clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
    }
    .section-title {
      font-size: 30px;
      font-weight: 800;
      color: var(--text-white);
      line-height: 1.25;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 760px;
      line-height: 1.7;
    }

    /* Hero Section (Developer API Style) */
    .hero-stage {
      padding: 64px 0 80px;
      background: radial-gradient(circle at 50% 20%, rgba(0, 245, 155, 0.08) 0%, rgba(10, 15, 29, 0) 70%);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .hero-h1 {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.18;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
    }
    .hero-h1 span {
      color: var(--primary-electric);
      text-shadow: 0 0 18px rgba(0, 245, 155, 0.3);
    }
    .hero-intro {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 30px;
    }
    .hero-meta-strip {
      display: flex;
      gap: 24px;
      margin-top: 36px;
      border-top: 1px solid var(--border-panel);
      padding-top: 24px;
    }
    .hero-metric-item h4 {
      font-size: 24px;
      font-weight: 800;
      color: var(--text-white);
      margin-bottom: 2px;
    }
    .hero-metric-item h4 em {
      font-style: normal;
      font-size: 14px;
      color: var(--primary-electric);
      margin-left: 2px;
    }
    .hero-metric-item p {
      font-size: 12px;
      color: var(--text-sub);
      margin: 0;
    }

    /* Terminal Code Mockup */
    .code-terminal-box {
      background: #0d1322;
      border: 1px solid rgba(0, 245, 155, 0.25);
      border-radius: 4px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
      overflow: hidden;
    }
    .terminal-bar {
      background: #151e33;
      padding: 10px 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .terminal-dots {
      display: flex;
      gap: 6px;
    }
    .terminal-dots span {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #334155;
    }
    .terminal-dots span:nth-child(1) { background: #ef4444; }
    .terminal-dots span:nth-child(2) { background: #f59e0b; }
    .terminal-dots span:nth-child(3) { background: #10b981; }
    .terminal-badge {
      font-size: 11px;
      color: var(--text-sub);
      font-family: monospace;
    }
    .terminal-body {
      padding: 20px;
      font-family: Consolas, Monaco, "Courier New", monospace;
      font-size: 13px;
      line-height: 1.7;
      color: #94a3b8;
    }
    .terminal-body .code-kw { color: #f43f5e; }
    .terminal-body .code-func { color: #38bdf8; }
    .terminal-body .code-str { color: #a3e635; }
    .terminal-body .code-comment { color: #475569; }

    /* Match Ticker Bar (Section 2) */
    .board-strip {
      background: #0e1424;
      border: 1px solid var(--border-panel);
      padding: 16px 20px;
      display: flex;
      align-items: center;
      justify-content: space-around;
      flex-wrap: wrap;
      gap: 16px;
    }
    .board-cell {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .board-cell-num {
      font-size: 22px;
      font-weight: 800;
      color: var(--primary-electric);
      font-family: monospace;
    }
    .board-cell-label {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.3;
    }

    /* Cards System */
    .stadium-card {
      background: var(--bg-panel);
      border: 1px solid var(--border-panel);
      padding: 28px 24px;
      height: 100%;
      position: relative;
      transition: all 0.25s ease;
      clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
    }
    .stadium-card:hover {
      border-color: var(--border-active);
      transform: translateY(-4px);
      box-shadow: 0 12px 28px rgba(0, 0, 0, 0.4);
    }
    .card-top-tag {
      font-size: 11px;
      color: var(--accent-gold);
      font-weight: 700;
      letter-spacing: 1px;
      margin-bottom: 12px;
      display: block;
    }
    .card-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-white);
      margin-bottom: 12px;
    }
    .card-text {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* Red vs Blue Arena Table (Section 5) */
    .arena-matrix {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      border: 1px solid var(--border-panel);
      background: var(--bg-panel);
      border-radius: 4px;
      overflow: hidden;
    }
    .arena-matrix th, .arena-matrix td {
      padding: 16px 20px;
      text-align: left;
      border-bottom: 1px solid var(--border-panel);
      font-size: 14px;
    }
    .arena-matrix th {
      background: #111728;
      font-weight: 700;
      color: var(--text-white);
    }
    .arena-matrix th.highlight-col, .arena-matrix td.highlight-col {
      background: rgba(0, 245, 155, 0.05);
      border-left: 1px solid rgba(0, 245, 155, 0.2);
      border-right: 1px solid rgba(0, 245, 155, 0.2);
      color: var(--primary-electric);
      font-weight: 600;
    }
    .arena-matrix tr:last-child td {
      border-bottom: none;
    }

    /* Player Interface Stage (Section 7) */
    .player-deck {
      background: #0d1424;
      border: 1px solid var(--border-panel);
      border-radius: 6px;
      padding: 24px;
      position: relative;
    }
    .deck-screen {
      background: #050810;
      border: 1px dashed rgba(255, 255, 255, 0.15);
      height: 320px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      position: relative;
      overflow: hidden;
    }
    .screen-live-badge {
      position: absolute;
      top: 16px;
      left: 16px;
      background: var(--accent-red);
      color: #fff;
      font-size: 11px;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 2px;
      letter-spacing: 1px;
    }
    .screen-fps-badge {
      position: absolute;
      top: 16px;
      right: 16px;
      background: rgba(0, 0, 0, 0.7);
      border: 1px solid var(--border-active);
      color: var(--primary-electric);
      font-size: 11px;
      font-family: monospace;
      padding: 3px 8px;
    }
    .play-btn-circle {
      width: 68px;
      height: 68px;
      border-radius: 50%;
      background: rgba(0, 245, 155, 0.15);
      border: 2px solid var(--primary-electric);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 20px rgba(0, 245, 155, 0.4);
      cursor: pointer;
    }
    .play-btn-circle::after {
      content: "";
      border-style: solid;
      border-width: 10px 0 10px 18px;
      border-color: transparent transparent transparent var(--primary-electric);
      margin-left: 4px;
    }
    .deck-controls-row {
      margin-top: 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      color: var(--text-muted);
      font-size: 12px;
    }

    /* Price / Tier Matrix */
    .tier-box {
      background: var(--bg-panel);
      border: 1px solid var(--border-panel);
      padding: 32px 24px;
      position: relative;
      transition: all 0.25s ease;
    }
    .tier-box.is-pro {
      border-color: var(--primary-electric);
      box-shadow: 0 0 24px rgba(0, 245, 155, 0.18);
      transform: scale(1.02);
    }
    .tier-badge {
      position: absolute;
      top: 0;
      right: 20px;
      background: var(--primary-electric);
      color: #041009;
      font-size: 10px;
      font-weight: 800;
      padding: 4px 10px;
      letter-spacing: 1px;
    }
    .tier-price {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-white);
      margin: 16px 0;
    }
    .tier-price small {
      font-size: 13px;
      color: var(--text-sub);
      font-weight: 400;
    }
    .tier-list {
      list-style: none;
      margin: 20px 0 28px;
      padding: 0;
    }
    .tier-list li {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .tier-list li::before {
      content: "✓";
      color: var(--primary-electric);
      font-weight: 800;
    }

    /* Review Card */
    .review-unit {
      background: var(--bg-panel);
      border: 1px solid var(--border-panel);
      padding: 22px;
      margin-bottom: 20px;
    }
    .review-head {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 12px;
    }
    .user-tag {
      font-weight: 700;
      color: var(--text-white);
      font-size: 14px;
    }
    .score-chip {
      background: rgba(0, 245, 155, 0.15);
      color: var(--primary-electric);
      font-weight: 800;
      font-size: 12px;
      padding: 2px 8px;
      border-radius: 2px;
      font-family: monospace;
    }

    /* News Grid */
    .news-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-panel);
      padding: 24px;
      transition: all 0.25s ease;
      height: 100%;
    }
    .news-item:hover {
      border-color: rgba(255, 255, 255, 0.2);
    }
    .news-date {
      font-size: 11px;
      color: var(--accent-gold);
      font-weight: 600;
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-white);
      margin-bottom: 10px;
      line-height: 1.4;
    }

    /* Accordion FAQ */
    .faq-block {
      border: 1px solid var(--border-panel);
      background: var(--bg-panel);
      margin-bottom: 12px;
    }
    .faq-q {
      padding: 18px 24px;
      font-weight: 700;
      color: var(--text-white);
      font-size: 15px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-q::after {
      content: "+";
      color: var(--primary-electric);
      font-size: 18px;
      font-weight: bold;
    }
    .faq-a {
      padding: 0 24px 18px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Bottom CTA Stage */
    .cta-banner {
      background: linear-gradient(135deg, #101930 0%, #080d19 100%);
      border: 1px solid var(--border-active);
      padding: 64px 32px;
      text-align: center;
      position: relative;
      box-shadow: inset 0 0 80px rgba(0, 245, 155, 0.08);
    }
    .cta-banner h3 {
      font-size: 32px;
      font-weight: 900;
      color: var(--text-white);
      margin-bottom: 16px;
    }

    /* Footer */
    .site-footer {
      background: #070a14;
      border-top: 1px solid var(--border-panel);
      padding: 60px 0 24px;
      font-size: 13.5px;
      color: var(--text-muted);
    }
    .footer-col-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-white);
      letter-spacing: 1px;
      margin-bottom: 18px;
      text-transform: uppercase;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: var(--text-sub);
    }
    .footer-links a:hover {
      color: var(--primary-electric);
    }
    .footer-bottom-line {
      margin-top: 48px;
      padding-top: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      color: var(--text-sub);
    }

    /* Mobile off-canvas toggler */
    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: 1px solid var(--border-panel);
      color: var(--text-white);
      padding: 8px 12px;
      font-size: 18px;
      cursor: pointer;
    }
    .mobile-menu-drawer {
      display: none;
      background: var(--bg-surface);
      border-bottom: 1px solid var(--border-panel);
      padding: 20px;
    }
    .mobile-menu-drawer.is-open {
      display: block;
    }
    .mobile-menu-drawer a {
      display: block;
      padding: 10px 0;
      color: var(--text-muted);
      border-bottom: 1px solid var(--border-panel);
    }
    .mobile-menu-drawer a:last-child {
      border-bottom: none;
    }

    @media screen and (max-width: 1023px) {
      .nav-wing {
        display: none;
      }
      .mobile-menu-btn {
        display: inline-block;
      }
      .hero-h1 {
        font-size: 32px;
      }
      .section-title {
        font-size: 24px;
      }
      .footer-bottom-line {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }

/* roulang page: category1 */
:root {
      --bg-stadium: #0A0F1D;
      --bg-surface: #121829;
      --bg-panel: #182035;
      --bg-panel-hover: #1f2a44;
      --primary-electric: #00F59B;
      --primary-glow: rgba(0, 245, 155, 0.35);
      --accent-red: #FF3B30;
      --accent-gold: #FFB800;
      --text-white: #FFFFFF;
      --text-muted: #A0AEC0;
      --text-sub: #64748B;
      --border-panel: rgba(255, 255, 255, 0.08);
      --border-active: rgba(0, 245, 155, 0.35);
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }
    
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      background-color: var(--bg-stadium);
      color: var(--text-white);
      font-family: var(--font-stack);
      line-height: 1.65;
      font-size: 15px;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--text-muted);
      text-decoration: none;
      transition: all 0.25s ease;
    }
    a:hover, a:focus {
      color: var(--primary-electric);
    }

    /* Global Navigation */
    .site-header {
      background: rgba(10, 15, 29, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-panel);
      position: sticky;
      top: 0;
      z-index: 1000;
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }
    .nav-wing {
      display: flex;
      align-items: center;
      gap: 28px;
      flex: 1;
    }
    .nav-wing.wing-right {
      justify-content: flex-end;
    }
    .nav-link-item {
      font-size: 14px;
      font-weight: 600;
      letter-spacing: 0.5px;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }
    .nav-link-item:hover, .nav-link-item.is-active {
      color: var(--primary-electric);
    }
    .nav-link-item.is-active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary-electric);
      box-shadow: 0 0 8px var(--primary-electric);
    }
    .nav-center-brand {
      flex: 0 0 auto;
      padding: 0 32px;
      text-align: center;
    }
    .brand-title {
      font-size: 22px;
      font-weight: 800;
      color: var(--text-white);
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 8px;
      line-height: 1;
    }
    .brand-title span {
      color: var(--primary-electric);
      text-shadow: 0 0 10px rgba(0, 245, 155, 0.4);
    }
    .brand-tagline {
      font-size: 11px;
      color: var(--text-sub);
      letter-spacing: 1.5px;
      text-transform: uppercase;
      margin-top: 3px;
    }

    /* Skew Buttons */
    .btn-skew {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--primary-electric);
      color: #041009 !important;
      font-weight: 700;
      font-size: 13px;
      padding: 10px 22px;
      clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
      transition: all 0.25s ease;
      position: relative;
      cursor: pointer;
      border: none;
    }
    .btn-skew:hover {
      box-shadow: 0 0 24px rgba(0, 245, 155, 0.6);
      transform: translateY(-2px);
    }
    .btn-skew-alt {
      background: transparent;
      color: var(--text-white) !important;
      border: 1px solid var(--border-active);
      clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
    }
    .btn-skew-alt:hover {
      background: rgba(0, 245, 155, 0.1);
      border-color: var(--primary-electric);
      color: var(--primary-electric) !important;
    }

    /* Mobile Drawer */
    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-panel);
      color: var(--text-white);
      font-size: 20px;
      padding: 6px 12px;
      border-radius: 4px;
      cursor: pointer;
    }
    .mobile-menu-drawer {
      display: none;
      background: var(--bg-surface);
      border-bottom: 1px solid var(--border-panel);
      padding: 16px 24px;
    }
    .mobile-menu-drawer a {
      display: block;
      padding: 10px 0;
      font-size: 15px;
      color: var(--text-muted);
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }
    .mobile-menu-drawer a:last-child {
      border-bottom: none;
    }

    /* Sections Shared */
    .app-section {
      padding: 64px 0;
      position: relative;
      border-bottom: 1px solid var(--border-panel);
    }
    .section-pill {
      display: inline-block;
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 1.5px;
      padding: 4px 12px;
      background: rgba(0, 245, 155, 0.12);
      border: 1px solid rgba(0, 245, 155, 0.3);
      color: var(--primary-electric);
      margin-bottom: 12px;
      clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
    }
    .section-title {
      font-size: 28px;
      font-weight: 800;
      color: var(--text-white);
      line-height: 1.3;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 760px;
      line-height: 1.7;
    }

    /* Category Hero & Self-assessment Quiz Layout */
    .cat-hero-panel {
      background: linear-gradient(135deg, #121829 0%, #182035 100%);
      border: 1px solid var(--border-panel);
      border-top: 2px solid var(--primary-electric);
      padding: 36px 32px;
      position: relative;
      margin-top: 28px;
      box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
    }
    .quiz-group-title {
      font-size: 13px;
      font-weight: 700;
      color: var(--accent-gold);
      letter-spacing: 1px;
      text-transform: uppercase;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .filter-btn-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 20px;
    }
    .filter-chip {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-panel);
      color: var(--text-muted);
      padding: 6px 14px;
      font-size: 13px;
      cursor: pointer;
      transition: all 0.2s ease;
      clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
    }
    .filter-chip:hover, .filter-chip.active {
      background: rgba(0, 245, 155, 0.15);
      border-color: var(--primary-electric);
      color: var(--primary-electric);
      font-weight: 600;
    }
    .calc-preview-card {
      background: #0d1222;
      border: 1px dashed var(--border-active);
      padding: 24px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .calc-val-strip {
      display: flex;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      padding: 8px 0;
      font-size: 13px;
    }
    .calc-val-strip span:first-child {
      color: var(--text-sub);
    }
    .calc-val-strip span:last-child {
      color: var(--primary-electric);
      font-family: monospace;
      font-weight: bold;
    }

    /* Video Resource Cards Grid */
    .stadium-card {
      background: var(--bg-panel);
      border: 1px solid var(--border-panel);
      transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
      position: relative;
      overflow: hidden;
      margin-bottom: 24px;
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .stadium-card:hover {
      border-color: var(--primary-electric);
      box-shadow: 0 10px 28px rgba(0, 245, 155, 0.15);
      transform: translateY(-4px);
    }
    .card-thumb-wrap {
      position: relative;
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #0e1424;
      overflow: hidden;
    }
    .card-thumb-bg {
      width: 100%;
      height: 100%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      letter-spacing: 1px;
      font-weight: 700;
      color: var(--text-sub);
      background-size: cover;
      background-position: center;
      transition: transform 0.5s ease;
    }
    .stadium-card:hover .card-thumb-bg {
      transform: scale(1.05);
    }
    .badge-live-pulse {
      position: absolute;
      top: 10px;
      left: 10px;
      background: rgba(10, 15, 29, 0.85);
      border: 1px solid rgba(0, 245, 155, 0.4);
      color: var(--primary-electric);
      font-size: 10px;
      font-weight: 700;
      padding: 3px 8px;
      display: flex;
      align-items: center;
      gap: 5px;
      backdrop-filter: blur(4px);
      clip-path: polygon(4px 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
    }
    .badge-live-pulse::before {
      content: "";
      width: 6px;
      height: 6px;
      background: var(--primary-electric);
      border-radius: 50%;
      box-shadow: 0 0 6px var(--primary-electric);
    }
    .badge-spec-tag {
      position: absolute;
      top: 10px;
      right: 10px;
      background: var(--accent-red);
      color: #FFFFFF;
      font-size: 10px;
      font-weight: 800;
      padding: 2px 6px;
      clip-path: polygon(4px 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
    }
    .card-content {
      padding: 18px 20px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .card-meta-line {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      color: var(--text-sub);
      margin-bottom: 8px;
    }
    .card-score-box {
      color: var(--accent-gold);
      font-weight: 800;
      font-family: monospace;
      font-size: 14px;
    }
    .card-main-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-white);
      margin-bottom: 8px;
      line-height: 1.4;
    }
    .card-desc-text {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .card-footer-action {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-top: 12px;
      border-top: 1px solid var(--border-panel);
    }
    .card-speed-tag {
      font-size: 11px;
      color: var(--primary-electric);
      background: rgba(0, 245, 155, 0.08);
      padding: 2px 8px;
      border: 1px solid rgba(0, 245, 155, 0.2);
    }

    /* Spotlight Leaderboard Ranking */
    .spotlight-row {
      background: var(--bg-surface);
      border: 1px solid var(--border-panel);
      padding: 20px 24px;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      transition: all 0.25s ease;
      position: relative;
    }
    .spotlight-row:hover {
      border-color: var(--border-active);
      background: var(--bg-panel);
    }
    .rank-number-box {
      font-size: 32px;
      font-weight: 900;
      font-style: italic;
      color: var(--accent-gold);
      min-width: 60px;
      line-height: 1;
    }
    .rank-number-box.top1 {
      color: var(--primary-electric);
      text-shadow: 0 0 12px rgba(0, 245, 155, 0.4);
    }

    /* Format Matrix */
    .tech-matrix-box {
      background: var(--bg-panel);
      border: 1px solid var(--border-panel);
      padding: 28px 24px;
      height: 100%;
      border-left: 3px solid var(--primary-electric);
    }
    .matrix-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-white);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .matrix-badge {
      font-size: 11px;
      color: var(--accent-gold);
      font-family: monospace;
      border: 1px solid rgba(255, 184, 0, 0.3);
      padding: 2px 6px;
    }
    .matrix-list {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .matrix-list li {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 8px;
      position: relative;
      padding-left: 16px;
    }
    .matrix-list li::before {
      content: "›";
      position: absolute;
      left: 0;
      color: var(--primary-electric);
      font-weight: bold;
    }

    /* Guidelines Section */
    .guide-banner-panel {
      background: linear-gradient(90deg, #182035 0%, #0d1222 100%);
      border: 1px solid var(--border-panel);
      padding: 36px;
    }

    /* Community Pulse Reviews */
    .review-bubble-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-panel);
      padding: 24px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-user-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .user-avatar-placeholder {
      width: 42px;
      height: 42px;
      background: #1e2840;
      border: 1px solid var(--primary-electric);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 14px;
      color: var(--primary-electric);
      clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
    }

    /* Article Entrance Cards */
    .deep-entry-card {
      background: var(--bg-panel);
      border: 1px solid var(--border-panel);
      padding: 24px;
      transition: all 0.25s ease;
      height: 100%;
    }
    .deep-entry-card:hover {
      border-color: var(--primary-electric);
      transform: translateY(-3px);
    }

    /* Bottom Activation CTA */
    .category-cta-band {
      background: radial-gradient(circle at 50% 50%, rgba(0, 245, 155, 0.12) 0%, rgba(10, 15, 29, 0.98) 80%);
      border: 1px solid var(--border-active);
      padding: 48px 32px;
      text-align: center;
      margin-top: 20px;
    }

    /* Footer */
    .site-footer {
      background: #070a14;
      border-top: 1px solid var(--border-panel);
      padding: 64px 0 32px;
    }
    .footer-col-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-white);
      margin-bottom: 18px;
      letter-spacing: 0.5px;
      border-left: 2px solid var(--primary-electric);
      padding-left: 8px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      font-size: 13px;
      color: var(--text-muted);
    }
    .footer-links a:hover {
      color: var(--primary-electric);
      padding-left: 4px;
    }
    .footer-bottom-line {
      margin-top: 48px;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 12px;
      color: var(--text-sub);
    }

    /* Responsive adjustments */
    @media (max-width: 1023px) {
      .nav-wing { display: none; }
      .mobile-menu-btn { display: block; }
      .section-title { font-size: 24px; }
      .cat-hero-panel { padding: 24px 18px; }
      .spotlight-row { flex-direction: column; align-items: flex-start; gap: 14px; }
      .footer-bottom-line { flex-direction: column; align-items: flex-start; }
    }
    @media (max-width: 639px) {
      .app-section { padding: 48px 0; }
      .brand-title { font-size: 18px; }
      .brand-tagline { display: none; }
    }