:root {
    --bg-dark: #12100e;
    --bg-card: #1c1816;
    --text-main: #f0ebe4;
    --text-muted: #a89c92;
    --accent-gold: #c9a063;
    --accent-red: #8c3b3b;
    --border-color: #332b27;
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }
  body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }
  a { text-decoration: none; color: inherit; }
  img { max-width: 100%; display: block; }

  /* Header */
  .site-header {
    position: sticky;
    top: 0;
    background-color: rgba(18, 16, 14, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
  }
  .header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .logo-group { display: flex; align-items: center; gap: 12px; }
  .logo-group img { height: 32px; width: auto; }
  .logo-group span { font-size: 1.2rem; font-weight: 700; letter-spacing: 1px; color: var(--accent-gold); }
  .nav-links { display: flex; gap: 24px; }
  .nav-links a { font-size: 0.95rem; color: var(--text-muted); transition: color 0.3s; }
  .nav-links a:hover { color: var(--accent-gold); }
  
  .mobile-menu-btn { display: none; background: none; border: none; color: var(--text-main); font-size: 1.5rem; cursor: pointer; }

  /* Buttons */
  .btn-download {
    display: inline-block;
    background-color: var(--accent-gold);
    color: #12100e;
    padding: 12px 28px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 1rem;
    transition: transform 0.2s, opacity 0.2s;
  }
  .btn-download:hover { transform: scale(1.02); opacity: 0.9; }

  /* Main container */
  main { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
  section { padding: 60px 0; border-bottom: 1px solid var(--border-color); }
  section:last-child { border-bottom: none; }
  
  .section-title { font-size: 2rem; margin-bottom: 12px; color: var(--accent-gold); font-weight: 600; }
  .section-desc { color: var(--text-muted); margin-bottom: 40px; max-width: 600px; }

  /* Hero Section */
  .hero-section { display: flex; flex-wrap: wrap; align-items: center; gap: 40px; padding: 80px 0; }
  .hero-content { flex: 1; min-width: 300px; }
  .hero-content h1 { font-size: 2.8rem; line-height: 1.3; margin-bottom: 20px; }
  .hero-content p { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 30px; max-width: 500px; }
  .hero-image { flex: 1; min-width: 300px; position: relative; }
  .hero-image img { border-radius: 12px; box-shadow: 0 20px 40px rgba(0,0,0,0.5); position: relative; z-index: 2; }

  /* Grid layouts */
  .grid-layout { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 24px; }
  .card { background: var(--bg-card); border-radius: 10px; overflow: hidden; border: 1px solid var(--border-color); transition: transform 0.3s; }
  .card:hover { transform: translateY(-5px); border-color: var(--accent-gold); }
  .card-img-wrapper { position: relative; padding-top: 140%; }
  .card-img-wrapper img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; }
  .card-info { padding: 16px; }
  .card-info h3 { font-size: 1.1rem; margin-bottom: 8px; color: #fff; }
  .card-info p { font-size: 0.85rem; color: var(--text-muted); }

  /* Theme Showcase (Alternating Colors) */
  .theme-section { background-color: #1a1614; margin: 0 -20px; padding: 60px 20px; }
  .theme-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
  .theme-item { display: flex; gap: 20px; align-items: center; padding: 20px; border-radius: 12px; }
  .theme-item img { width: 120px; height: 160px; object-fit: cover; border-radius: 8px; }
  .theme-item h3 { font-size: 1.3rem; margin-bottom: 10px; }
  .theme-item p { font-size: 0.9rem; color: #ccc; }
  
  /* 5 Color Variations for Themes */
  .theme-1 { background: linear-gradient(135deg, #2b1d1a, #1a1211); border-left: 4px solid #c96b5d; }
  .theme-2 { background: linear-gradient(135deg, #1a1d2b, #11121a); border-left: 4px solid #5d7dc9; }
  .theme-3 { background: linear-gradient(135deg, #1a2b1c, #111a12); border-left: 4px solid #5dc97b; }
  .theme-4 { background: linear-gradient(135deg, #2b281a, #1a1811); border-left: 4px solid #c9b65d; }
  .theme-5 { background: linear-gradient(135deg, #2b1a2b, #1a111a); border-left: 4px solid #b65dc9; }
  
  .theme-1 h3 { color: #c96b5d; }
  .theme-2 h3 { color: #5d7dc9; }
  .theme-3 h3 { color: #5dc97b; }
  .theme-4 h3 { color: #c9b65d; }
  .theme-5 h3 { color: #b65dc9; }

  /* Hot Ranking */
  .ranking-list { display: flex; flex-direction: column; gap: 16px; }
  .rank-item { display: flex; align-items: center; gap: 20px; background: var(--bg-card); padding: 16px; border-radius: 8px; border: 1px solid var(--border-color); }
  .rank-num { font-size: 1.5rem; font-weight: bold; color: var(--accent-gold); min-width: 40px; }
  .rank-img { width: 80px; height: 110px; object-fit: cover; border-radius: 6px; }
  .rank-info h3 { font-size: 1.2rem; margin-bottom: 5px; }
  .rank-info p { font-size: 0.9rem; color: var(--text-muted); }

  /* User Reviews */
  .review-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
  .review-card { background: #1c1816; padding: 24px; border-radius: 10px; border: 1px solid var(--border-color); }
  .review-user { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
  .review-avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--accent-red); display: flex; justify-content: center; align-items: center; font-weight: bold; color: #fff; }
  .review-name { font-weight: bold; }
  .review-text { font-size: 0.95rem; color: #ddd; font-style: italic; }

  /* History */
  .history-timeline { display: flex; flex-direction: column; gap: 30px; position: relative; padding-left: 30px; }
  .history-timeline::before { content: ''; position: absolute; left: 8px; top: 0; bottom: 0; width: 2px; background: var(--border-color); }
  .history-item { position: relative; }
  .history-item::before { content: ''; position: absolute; left: -26px; top: 6px; width: 10px; height: 10px; border-radius: 50%; background: var(--accent-gold); }
  .history-item h3 { font-size: 1.2rem; color: var(--accent-gold); margin-bottom: 8px; }
  .history-item p { color: var(--text-muted); font-size: 0.95rem; }

  /* Features */
  .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
  .feature-box { text-align: center; padding: 30px; background: var(--bg-card); border-radius: 12px; border: 1px solid var(--border-color); }
  .feature-box h3 { font-size: 1.2rem; margin-bottom: 12px; color: var(--accent-gold); }
  .feature-box p { font-size: 0.9rem; color: var(--text-muted); }

  /* Footer */
  .site-footer { background: #0d0b0a; padding: 40px 20px; text-align: center; font-size: 0.85rem; color: #665c55; border-top: 1px solid var(--border-color); }
  .site-footer p { margin-bottom: 10px; }
  .site-footer a { color: #665c55; text-decoration: underline; }
  .site-footer a:hover { color: var(--text-muted); }
  .update-time { font-size: 0.8rem; margin-top: 10px; opacity: 0.7; }

  /* Responsive */
  @media (max-width: 768px) {
    .nav-links { display: none; }
    .mobile-menu-btn { display: block; }
    .hero-section { flex-direction: column; text-align: center; padding: 40px 0; }
    .hero-content h1 { font-size: 2rem; }
    .hero-content p { margin: 0 auto 20px; }
    .hero-image { order: -1; max-width: 280px; margin: 0 auto; }
    .theme-grid { grid-template-columns: 1fr; }
    .feature-grid { grid-template-columns: 1fr; }
    .rank-item { flex-direction: column; text-align: center; }
    .rank-img { width: 100px; height: 140px; }
  }
  @media (max-width: 1024px) {
    .theme-grid { gap: 20px; }
    .theme-item { flex-direction: column; text-align: center; }
    .theme-item img { width: 100%; max-width: 200px; height: auto; }
  }