body {
      font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
      margin: 0;
      background: #f7f7f7;
      color: #333;
      overflow-y: scroll;
    }

    .gallery {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      padding: 20px;
      gap: 15px;
    }
    .gallery img {
      width: 280px;
      height: 200px;
      object-fit: cover;
      border-radius: 8px;
      cursor: pointer;
      box-shadow: 0 2px 6px rgba(0,0,0,0.15);
      transition: transform 0.2s;
    }
    .gallery img:hover {
      transform: scale(1.05);
    }
    .lightbox {
      display: none;
      position: fixed;
      top: 0; left: 0;
      width: 100%; height: 100%;
      background: rgba(0,0,0,0.8);
      justify-content: center;
      align-items: center;
      z-index: 1000;
    }
    .lightbox img {
      max-width: 90%;
      max-height: 90%;
      border: 4px solid white;
      border-radius: 10px;
    }