/* roulang page: index */
:root {
      --bg-main: #0F0F12;
      --bg-card: #18181F;
      --bg-darker: #09090B;
      --primary: #E53965;
      --secondary: #F59E0B;
      --accent-cyan: #06B6D4;
      --text-main: #F3F4F6;
      --text-muted: #9CA3AF;
      --text-dim: #6B7280;
      --border-solid: #2E2E38;
      --shadow-hard: 4px 4px 0px #000000;
      --shadow-primary: 4px 4px 0px #E53965;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Noto Sans SC", sans-serif;
      background-image: linear-gradient(rgba(18, 18, 23, 0.45) 1px, transparent 1px), linear-gradient(90deg, rgba(18, 18, 23, 0.45) 1px, transparent 1px);
      background-size: 32px 32px;
    }
    .pixel-box {
      border: 2px solid var(--border-solid);
      box-shadow: var(--shadow-hard);
      transition: transform 0.15s ease, box-shadow 0.15s ease;
    }
    .pixel-box-active {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-primary);
    }
    .pixel-btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      border: 2px solid #FFFFFF;
      box-shadow: 4px 4px 0px #000000;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.1s ease;
    }
    .pixel-btn-primary:hover {
      transform: translate(-1px, -1px);
      box-shadow: 5px 5px 0px #000000;
      background-color: #f43f6c;
    }
    .pixel-btn-primary:active {
      transform: translate(2px, 2px);
      box-shadow: 0px 0px 0px #000000;
    }
    .pixel-btn-sub {
      background-color: #262631;
      color: var(--text-main);
      border: 2px solid var(--border-solid);
      box-shadow: 4px 4px 0px #000000;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.1s ease;
    }
    .pixel-btn-sub:hover {
      background-color: #323242;
      border-color: #4B4B5E;
    }
    .pixel-btn-sub:active {
      transform: translate(2px, 2px);
      box-shadow: 0px 0px 0px #000000;
    }
    .font-mono-num {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    }
    .scanline {
      position: relative;
    }
    .scanline::before {
      content: " ";
      display: block;
      position: absolute;
      top: 0; left: 0; bottom: 0; right: 0;
      background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.03), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.03));
      z-index: 2;
      background-size: 100% 3px, 6px 100%;
      pointer-events: none;
    }

/* roulang page: category1 */
:root {
      --bg-main: #0F0F12;
      --bg-card: #18181F;
      --bg-darker: #09090B;
      --primary: #E53965;
      --secondary: #F59E0B;
      --accent-cyan: #06B6D4;
      --text-main: #F3F4F6;
      --text-muted: #9CA3AF;
      --text-dim: #6B7280;
      --border-solid: #2E2E38;
      --shadow-hard: 4px 4px 0px #000000;
      --shadow-primary: 4px 4px 0px #E53965;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Noto Sans SC", sans-serif;
      background-image: linear-gradient(rgba(18, 18, 23, 0.45) 1px, transparent 1px), linear-gradient(90deg, rgba(18, 18, 23, 0.45) 1px, transparent 1px);
      background-size: 32px 32px;
    }
    .font-mono-num {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    }
    .pixel-btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      border: 2px solid #FFFFFF;
      box-shadow: 4px 4px 0px #000000;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.1s ease;
    }
    .pixel-btn-primary:hover {
      transform: translate(-1px, -1px);
      box-shadow: 5px 5px 0px #000000;
      background-color: #f43f6c;
    }
    .pixel-btn-primary:active {
      transform: translate(2px, 2px);
      box-shadow: 0px 0px 0px #000000;
    }
    .pixel-btn-sub {
      background-color: #262631;
      color: var(--text-main);
      border: 2px solid var(--border-solid);
      box-shadow: 4px 4px 0px #000000;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.1s ease;
    }
    .pixel-btn-sub:hover {
      background-color: #323242;
      border-color: #4B4B5E;
    }
    .pixel-btn-sub:active {
      transform: translate(2px, 2px);
      box-shadow: 0px 0px 0px #000000;
    }
    .pixel-card {
      background-color: var(--bg-card);
      border: 2px solid var(--border-solid);
      box-shadow: 4px 4px 0px #000000;
      transition: transform 0.15s ease, border-color 0.15s ease;
    }
    .pixel-card:hover {
      border-color: var(--primary);
      transform: translateY(-2px);
    }
    .scanline {
      background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.03), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.03));
      background-size: 100% 4px, 6px 100%;
    }

/* roulang page: category2 */
:root {
      --bg-main: #0F0F12;
      --bg-card: #18181F;
      --bg-darker: #09090B;
      --primary: #E53965;
      --secondary: #F59E0B;
      --accent-cyan: #06B6D4;
      --text-main: #F3F4F6;
      --text-muted: #9CA3AF;
      --text-dim: #6B7280;
      --border-solid: #2E2E38;
      --shadow-hard: 4px 4px 0px #000000;
      --shadow-primary: 4px 4px 0px #E53965;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Noto Sans SC", sans-serif;
      background-image: linear-gradient(rgba(18, 18, 23, 0.45) 1px, transparent 1px), linear-gradient(90deg, rgba(18, 18, 23, 0.45) 1px, transparent 1px);
      background-size: 32px 32px;
    }
    .pixel-btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      border: 2px solid #FFFFFF;
      box-shadow: 4px 4px 0px #000000;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.1s ease;
    }
    .pixel-btn-primary:hover {
      transform: translate(-1px, -1px);
      box-shadow: 5px 5px 0px #000000;
      background-color: #f43f6c;
    }
    .pixel-btn-primary:active {
      transform: translate(2px, 2px);
      box-shadow: 0px 0px 0px #000000;
    }
    .pixel-btn-sub {
      background-color: #262631;
      color: var(--text-main);
      border: 2px solid var(--border-solid);
      box-shadow: 4px 4px 0px #000000;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.1s ease;
    }
    .pixel-btn-sub:hover {
      background-color: #323242;
      border-color: #4B4B5E;
    }
    .pixel-btn-sub:active {
      transform: translate(2px, 2px);
      box-shadow: 0px 0px 0px #000000;
    }
    .font-mono-num {
      font-family: ui-monospace, Menlo, Monaco, Consolas, monospace;
    }
    .retro-badge {
      border: 1px solid var(--border-solid);
      box-shadow: 2px 2px 0px #000000;
    }
    .crt-scanline {
      background: repeating-linear-gradient(0deg, rgba(0, 0, 0, 0.15), rgba(0, 0, 0, 0.15) 1px, transparent 1px, transparent 2px);
    }