:root {
    --bg-dark: #0b0b0b;
    --neon-green: #d7ff3f;
    --orange: #ff5a28;
    --cream: #f5f1e7;
    --text-main: #f5f1e7;
    --text-muted: #999;
    --panel-bg: #151515;
  }

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

  body {
    font-family: "Arial Black", "Helvetica Neue", Helvetica, Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
  }

  a {
    text-decoration: none;
    color: inherit;
  }

  img {
    display: block;
    max-width: 100%;
    object-fit: cover;
  }

  h1, h2, h3 {
    font-weight: 900;
    line-height: 1.2;
  }

  .container {
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 20px;
  }

  /* Typography Helpers */
  .mono {
    font-family: "Courier New", Courier, monospace;
    font-weight: bold;
  }

  .text-green { color: var(--neon-green); }
  .text-orange { color: var(--orange); }

  /* Nav Sidebar */
  .nav-sidebar {
    position: fixed;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding-left: 20px;
    z-index: 100;
  }

  .nav-item {
    display: flex;
    align-items: center;
    gap: 16px;
    opacity: 0.6;
    transition: opacity 0.2s, transform 0.2s;
  }

  .nav-item:hover {
    opacity: 1;
    transform: translateX(5px);
  }

  .nav-num {
    font-size: 42px;
    font-weight: 900;
    -webkit-text-stroke: 1px var(--neon-green);
    color: transparent;
    line-height: 1;
  }

  .nav-text {
    font-size: 14px;
    font-weight: bold;
    color: var(--cream);
  }

  /* Header & Logo */
  .site-header {
    padding: 24px 0;
    position: relative;
    z-index: 10;
  }

  .logo-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .logo-wrap img {
    height: 36px;
    border-radius: 4px;
  }

  .logo-wrap span {
    font-size: 20px;
    font-weight: 900;
    letter-spacing: 1px;
  }

  /* Sections */
  section {
    padding: 80px 0;
    position: relative;
  }

  .section-header {
    margin-bottom: 40px;
    display: flex;
    align-items: baseline;
    gap: 16px;
  }

  .section-num {
    font-size: 24px;
    font-weight: 900;
    color: var(--orange);
  }

  .section-title {
    font-size: 32px;
    font-weight: 900;
    letter-spacing: 2px;
  }

  /* Hero */
  .hero {
    min-height: 85vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding-top: 100px;
  }

  .hero h1 {
    font-size: clamp(40px, 6vw, 72px);
    margin-bottom: 24px;
    letter-spacing: 2px;
  }

  .hero-sub {
    font-size: 18px;
    color: var(--text-muted);
    max-width: 600px;
    margin-bottom: 40px;
  }

  .download-btn {
    display: inline-block;
    background-color: var(--neon-green);
    color: var(--bg-dark);
    font-size: 20px;
    font-weight: 900;
    padding: 16px 48px;
    border-radius: 50px;
    border: 2px solid var(--neon-green);
    box-shadow: 0 4px 0 var(--orange);
    transition: transform 0.1s, box-shadow 0.1s;
    margin-bottom: 48px;
  }

  .download-btn:active {
    transform: translateY(4px);
    box-shadow: 0 0 0 var(--orange);
  }

  .hero-image {
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
    border-radius: 12px;
    border: 2px solid var(--cream);
    box-shadow: 8px 8px 0 var(--orange);
    overflow: hidden;
  }

  .hero-image img {
    width: 100%;
    height: auto;
    aspect-ratio: 9 / 16;
  }

  /* Section 2: 套路 */
  .trope-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .trope-card {
    background: var(--panel-bg);
    border: 1px solid #333;
    padding: 24px;
    border-radius: 8px;
    position: relative;
  }

  .trope-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--neon-green);
  }

  .trope-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--orange);
  }

  .trope-card p {
    font-size: 15px;
    color: var(--text-muted);
  }

  .trope-card.highlight {
    background: var(--neon-green);
    color: var(--bg-dark);
    border-color: var(--neon-green);
  }

  .trope-card.highlight h3 {
    color: var(--bg-dark);
  }

  .trope-card.highlight p {
    color: var(--bg-dark);
    font-weight: bold;
  }

  /* Section 3: 片单 */
  .playlist-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .playlist-card {
    background: var(--panel-bg);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #333;
    transition: transform 0.2s;
  }

  .playlist-card:hover {
    transform: translateY(-4px);
  }

  .playlist-card img {
    width: 100%;
    aspect-ratio: 3 / 4;
  }

  .playlist-info {
    padding: 16px;
  }

  .playlist-info h3 {
    font-size: 18px;
    margin-bottom: 8px;
  }

  .playlist-info p {
    font-size: 13px;
    color: var(--text-muted);
  }

  /* Section 4: 标签 */
  .tag-section-wrap {
    display: flex;
    gap: 40px;
    align-items: center;
    background: var(--panel-bg);
    border: 1px solid #333;
    border-radius: 8px;
    padding: 40px;
  }

  .tag-image {
    flex: 1;
    border-radius: 8px;
    overflow: hidden;
  }

  .tag-image img {
    width: 100%;
    aspect-ratio: 16 / 9;
  }

  .tag-content {
    flex: 1;
  }

  .tag-content h2 {
    font-size: 28px;
    margin-bottom: 24px;
  }

  .tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
  }

  .tag-pill {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 50px;
    border: 1px solid var(--text-muted);
    font-size: 14px;
    color: var(--cream);
    transition: all 0.2s;
  }

  .tag-pill:hover {
    border-color: var(--neon-green);
    color: var(--neon-green);
  }

  .tag-pill.active {
    background: var(--neon-green);
    color: var(--bg-dark);
    border-color: var(--neon-green);
    font-weight: bold;
  }

  /* Section 5: 数据 */
  .stats-banner {
    width: 100%;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 48px;
    border: 1px solid #333;
  }

  .stats-banner img {
    width: 100%;
    aspect-ratio: 16 / 9;
  }

  .stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    text-align: center;
  }

  .stat-item h3 {
    font-size: 48px;
    color: var(--neon-green);
    margin-bottom: 8px;
  }

  .stat-item p {
    font-size: 16px;
    color: var(--text-muted);
  }

  /* Section 6: 留言 */
  .feedback-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .feedback-card {
    background: var(--panel-bg);
    padding: 24px;
    border-radius: 8px;
    border-left: 4px solid var(--orange);
  }

  .feedback-card p {
    font-size: 15px;
    color: var(--cream);
    margin-bottom: 16px;
    font-style: italic;
  }

  .feedback-user {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: bold;
  }

  /* Section 7: FAQ */
  .faq-list {
    max-width: 800px;
    margin: 0 auto;
  }

  .faq-item {
    background: var(--panel-bg);
    border: 1px solid #333;
    border-radius: 8px;
    margin-bottom: 16px;
    padding: 24px;
  }

  .faq-item h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--neon-green);
  }

  .faq-item p {
    font-size: 15px;
    color: var(--text-muted);
  }

  /* Section 8: Download */
  .download-section {
    text-align: center;
    background: linear-gradient(135deg, var(--panel-bg) 0%, var(--bg-dark) 100%);
    border-top: 1px solid #333;
    border-bottom: 1px solid #333;
  }

  .download-section h2 {
    font-size: 36px;
    margin-bottom: 24px;
  }

  .download-section p {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 40px;
  }

  /* Footer */
  .site-footer {
    padding: 40px 0;
    text-align: center;
    font-size: 12px;
    color: #555;
    border-top: 1px solid #222;
  }

  .site-footer a {
    color: #555;
    transition: color 0.2s;
  }

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

  .footer-time {
    margin-top: 8px;
    font-family: "Courier New", Courier, monospace;
  }

  /* Responsive */
  @media (max-width: 1024px) {
    .nav-sidebar {
      display: none; /* Switch to bottom bar on mobile */
    }

    .hero h1 {
      font-size: 56px;
    }

    .trope-grid, .playlist-grid, .stats-grid, .feedback-grid {
      grid-template-columns: 1fr 1fr;
    }

    .tag-section-wrap {
      flex-direction: column;
    }

    .tag-image {
      width: 100%;
    }
  }

  @media (max-width: 768px) {
    .nav-sidebar {
      display: flex;
      flex-direction: row;
      position: fixed;
      bottom: 0;
      left: 0;
      top: auto;
      transform: none;
      width: 100%;
      background: var(--bg-dark);
      padding: 10px;
      justify-content: space-around;
      border-top: 1px solid #333;
      padding-left: 10px;
      gap: 0;
    }

    .nav-item {
      flex-direction: column;
      gap: 4px;
    }

    .nav-num {
      font-size: 20px;
    }

    .nav-text {
      font-size: 10px;
    }

    .site-header {
      padding: 16px 0;
    }

    section {
      padding: 48px 0;
      padding-bottom: 80px; /* Space for bottom nav */
    }

    .hero {
      padding-top: 40px;
      min-height: auto;
    }

    .hero h1 {
      font-size: 36px;
    }

    .trope-grid, .playlist-grid, .stats-grid, .feedback-grid {
      grid-template-columns: 1fr;
    }

    .stat-item h3 {
      font-size: 36px;
    }

    .download-btn {
      width: 100%;
      text-align: center;
    }
  }