/* roulang page: index */
:root {
      --bg-primary: #080c14;
      --bg-card: rgba(15, 23, 42, 0.75);
      --border-glow: rgba(56, 189, 248, 0.2);
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --color-cyan: #06b6d4;
    }

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

    body {
      background-color: var(--bg-primary);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.25s ease;
    }

    /* Glassmorphism Styles */
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid var(--border-glow);
      box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .glass-card:hover {
      border-color: rgba(6, 182, 212, 0.45);
      box-shadow: 0 16px 40px -10px rgba(6, 182, 212, 0.2);
      transform: translateY(-3px);
    }

    /* Glowing CTA Button */
    .btn-glow {
      background: linear-gradient(135deg, #06b6d4 0%, #2563eb 100%);
      box-shadow: 0 0 25px rgba(6, 182, 212, 0.45);
      transition: all 0.3s ease;
    }

    .btn-glow:hover {
      box-shadow: 0 0 35px rgba(6, 182, 212, 0.7);
      transform: translateY(-2px);
    }

    .btn-ghost {
      background: rgba(30, 41, 59, 0.6);
      border: 1px solid rgba(56, 189, 248, 0.3);
      backdrop-filter: blur(8px);
      transition: all 0.3s ease;
    }

    .btn-ghost:hover {
      background: rgba(56, 189, 248, 0.15);
      border-color: #38bdf8;
      color: #38bdf8;
    }

    /* Gradient Text */
    .text-gradient {
      background: linear-gradient(135deg, #f8fafc 30%, #38bdf8 80%, #06b6d4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* Glow Dots & Rings */
    .glow-dot {
      box-shadow: 0 0 10px #06b6d4;
    }

    /* Custom Scrollbar */
    ::-webkit-scrollbar {
      width: 8px;
    }
    ::-webkit-scrollbar-track {
      background: #080c14;
    }
    ::-webkit-scrollbar-thumb {
      background: #1e293b;
      border-radius: 4px;
    }
    ::-webkit-scrollbar-thumb:hover {
      background: #06b6d4;
    }

    /* Accordion transitions */
    details summary::-webkit-details-marker {
      display: none;
    }

/* roulang page: category1 */
:root {
      --bg-primary: #080c14;
      --bg-card: rgba(15, 23, 42, 0.75);
      --border-glow: rgba(56, 189, 248, 0.2);
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --color-cyan: #06b6d4;
    }
    body {
      background-color: var(--bg-primary);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.25s ease;
    }
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid var(--border-glow);
      box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .glass-card:hover {
      border-color: rgba(6, 182, 212, 0.45);
      box-shadow: 0 16px 40px -10px rgba(6, 182, 212, 0.2);
      transform: translateY(-3px);
    }
    .btn-glow {
      background: linear-gradient(135deg, #06b6d4 0%, #2563eb 100%);
      box-shadow: 0 0 25px rgba(6, 182, 212, 0.45);
      transition: all 0.3s ease;
    }
    .btn-glow:hover {
      box-shadow: 0 0 35px rgba(6, 182, 212, 0.7);
      transform: translateY(-2px);
    }
    .btn-ghost {
      background: rgba(30, 41, 59, 0.6);
      border: 1px solid rgba(56, 189, 248, 0.3);
      backdrop-filter: blur(8px);
      transition: all 0.3s ease;
    }
    .btn-ghost:hover {
      background: rgba(56, 189, 248, 0.15);
      border-color: #38bdf8;
      color: #38bdf8;
    }
    .text-gradient {
      background: linear-gradient(135deg, #f8fafc 30%, #38bdf8 80%, #06b6d4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .filter-tag-active {
      background: rgba(6, 182, 212, 0.2);
      border-color: #06b6d4;
      color: #38bdf8;
    }
    .poster-zoom {
      transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .group:hover .poster-zoom {
      transform: scale(1.06);
    }

/* roulang page: category2 */
:root {
      --bg-primary: #080c14;
      --bg-card: rgba(15, 23, 42, 0.75);
      --border-glow: rgba(56, 189, 248, 0.2);
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --color-cyan: #06b6d4;
    }
    body {
      background-color: var(--bg-primary);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.25s ease;
    }
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid var(--border-glow);
      box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .glass-card:hover {
      border-color: rgba(6, 182, 212, 0.45);
      box-shadow: 0 16px 40px -10px rgba(6, 182, 212, 0.2);
      transform: translateY(-3px);
    }
    .btn-glow {
      background: linear-gradient(135deg, #06b6d4 0%, #2563eb 100%);
      box-shadow: 0 0 25px rgba(6, 182, 212, 0.45);
      transition: all 0.3s ease;
    }
    .btn-glow:hover {
      box-shadow: 0 0 35px rgba(6, 182, 212, 0.7);
      transform: translateY(-2px);
    }
    .btn-ghost {
      background: rgba(30, 41, 59, 0.6);
      border: 1px solid rgba(56, 189, 248, 0.3);
      backdrop-filter: blur(8px);
      transition: all 0.3s ease;
    }
    .btn-ghost:hover {
      background: rgba(56, 189, 248, 0.15);
      border-color: #38bdf8;
      color: #38bdf8;
    }
    .text-gradient {
      background: linear-gradient(135deg, #f8fafc 30%, #38bdf8 80%, #06b6d4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .filter-tag-active {
      background: rgba(6, 182, 212, 0.2);
      border-color: #06b6d4;
      color: #38bdf8;
      font-weight: 600;
    }

/* roulang page: category3 */
:root {
      --bg-primary: #080c14;
      --bg-card: rgba(15, 23, 42, 0.75);
      --border-glow: rgba(56, 189, 248, 0.2);
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --color-cyan: #06b6d4;
    }
    body {
      background-color: var(--bg-primary);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.25s ease;
    }
    /* Glassmorphism Styles */
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid var(--border-glow);
      box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .glass-card:hover {
      border-color: rgba(6, 182, 212, 0.45);
      box-shadow: 0 16px 40px -10px rgba(6, 182, 212, 0.2);
      transform: translateY(-3px);
    }
    /* Glowing CTA Button */
    .btn-glow {
      background: linear-gradient(135deg, #06b6d4 0%, #2563eb 100%);
      box-shadow: 0 0 25px rgba(6, 182, 212, 0.45);
      transition: all 0.3s ease;
    }
    .btn-glow:hover {
      box-shadow: 0 0 35px rgba(6, 182, 212, 0.7);
      transform: translateY(-2px);
    }
    .btn-ghost {
      background: rgba(30, 41, 59, 0.6);
      border: 1px solid rgba(56, 189, 248, 0.3);
      backdrop-filter: blur(8px);
      transition: all 0.3s ease;
    }
    .btn-ghost:hover {
      background: rgba(56, 189, 248, 0.15);
      border-color: #38bdf8;
      color: #38bdf8;
    }
    /* Gradient Text */
    .text-gradient {
      background: linear-gradient(135deg, #f8fafc 30%, #38bdf8 80%, #06b6d4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    /* 分类特有筛选标签 */
    .filter-tag {
      transition: all 0.2s ease;
      cursor: pointer;
    }
    .filter-tag.active {
      background-color: #06b6d4;
      color: #080c14;
      font-weight: 700;
      box-shadow: 0 0 12px rgba(6, 182, 212, 0.5);
    }
    .filter-tag:hover:not(.active) {
      border-color: rgba(6, 182, 212, 0.6);
      color: #38bdf8;
    }
    /* 榜单进度条与徽章 */
    .rank-badge {
      font-family: monospace;
      font-weight: 900;
    }
    .poster-zoom {
      transition: transform 0.4s ease;
    }
    .group:hover .poster-zoom {
      transform: scale(1.06);
    }