:root {
    --bg-dark: #130f14;
    --bg-card: #1c1720;
    --text-main: #f2ecf5;
    --text-sub: #b8aebf;
    --accent: #e03152;
    --accent-hover: #c42242;
    --border: rgba(255, 255, 255, 0.08);
    --radius: 16px;
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }
  a { text-decoration: none; color: inherit; }
  img { display: block; max-width: 100%; }
  .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

  /* Header */
  header {
    position: sticky;
    top: 0;
    background: rgba(19, 15, 20, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
  }
  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
  }
  .logo-wrap { display: flex; align-items: center; gap: 10px; }
  .logo-wrap img { height: 32px; width: auto; border-radius: 6px; }
  .logo-text { font-size: 20px; font-weight: 700; letter-spacing: 1px; }
  .nav-links { display: none; gap: 30px; font-size: 15px; color: var(--text-sub); }
  .nav-links a:hover { color: var(--text-main); }
  .btn-download {
    background-color: var(--accent);
    color: #fff;
    padding: 10px 24px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 15px;
    transition: background 0.3s;
  }
  .btn-download:hover { background-color: var(--accent-hover); }

  /* Hero */
  .hero { padding: 60px 0; text-align: center; border-bottom: 1px solid var(--border); }
  .hero h1 { font-size: 32px; line-height: 1.3; margin-bottom: 20px; font-weight: 800; }
  .hero p { font-size: 16px; color: var(--text-sub); max-width: 600px; margin: 0 auto 30px; }
  .hero-img {
    margin-top: 40px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
  }

  /* Sections Common */
  section { padding: 70px 0; }
  .section-header { margin-bottom: 40px; text-align: center; }
  .section-header h2 { font-size: 26px; font-weight: 700; margin-bottom: 12px; }
  .section-header p { color: var(--text-sub); font-size: 15px; max-width: 600px; margin: 0 auto; }

  /* Category Grid */
  .category-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .category-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    position: relative;
    aspect-ratio: 3/4;
  }
  .category-card img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform 0.5s ease;
  }
  .category-card:hover img { transform: scale(1.05); }
  .category-info {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    padding: 30px 20px 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
  }
  .category-info h3 { font-size: 20px; margin-bottom: 5px; }
  .category-info p { font-size: 14px; color: var(--text-sub); }

  /* Feature List */
  .feature-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .feature-item {
    display: flex;
    gap: 20px;
    background: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
  }
  .feature-icon {
    width: 48px; height: 48px;
    background: rgba(224, 49, 82, 0.1);
    color: var(--accent);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    flex-shrink: 0;
  }
  .feature-text h3 { font-size: 18px; margin-bottom: 8px; }
  .feature-text p { font-size: 14px; color: var(--text-sub); }

  /* Screenshot Wall */
  .screenshot-scroller {
    display: flex;
    gap: 16px;
    overflow-x: auto;
    padding-bottom: 20px;
    scroll-snap-type: x mandatory;
  }
  .screenshot-scroller::-webkit-scrollbar { height: 8px; }
  .screenshot-scroller::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
  .screenshot-item {
    flex: 0 0 240px;
    scroll-snap-align: start;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
  }
  .screenshot-item img { width: 100%; height: 360px; object-fit: cover; }

  /* Reviews */
  .review-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .review-card {
    background: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
  }
  .review-user {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
  }
  .review-avatar {
    width: 40px; height: 40px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: #fff;
  }
  .review-name { font-size: 15px; font-weight: 600; }
  .review-text { font-size: 14px; color: var(--text-sub); line-height: 1.8; }

  /* Download CTA */
  .download-section {
    text-align: center;
    background: linear-gradient(135deg, #2a1b22, #130f14);
    border-radius: 24px;
    padding: 60px 20px;
    border: 1px solid var(--border);
    margin-bottom: 60px;
  }
  .download-section h2 { font-size: 28px; margin-bottom: 16px; }
  .download-section p { color: var(--text-sub); margin-bottom: 30px; }
  .download-section .btn-download {
    display: inline-block;
    padding: 14px 48px;
    font-size: 18px;
  }

  /* Footer */
  footer {
    border-top: 1px solid var(--border);
    padding: 40px 0;
    text-align: center;
    color: var(--text-sub);
    font-size: 14px;
  }
  .footer-logo { margin-bottom: 16px; display: inline-flex; align-items: center; gap: 8px; }
  .footer-logo img { height: 28px; }
  .footer-update { margin-top: 10px; font-size: 12px; color: #6e6275; }

  /* Media Queries */
  @media (min-width: 768px) {
    .hero h1 { font-size: 48px; }
    .category-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-list { grid-template-columns: repeat(2, 1fr); }
    .review-grid { grid-template-columns: repeat(2, 1fr); }
    .nav-links { display: flex; }
    .hero { padding: 100px 0; }
    .section-header h2 { font-size: 32px; }
  }

  @media (min-width: 1024px) {
    .category-grid { grid-template-columns: repeat(3, 1fr); }
    .feature-list { grid-template-columns: repeat(3, 1fr); }
    .review-grid { grid-template-columns: repeat(3, 1fr); }
    .screenshot-item { flex: 0 0 280px; }
    .screenshot-item img { height: 420px; }
  }