body {
    margin: 0;
    padding: 0;
    background: #000;
    font-family: Arial, sans-serif;
  }
  .img-container {
    width: 100vw;
    overflow-x: hidden;
    padding-bottom: 70px; /* 给底部按钮留空间 */
    box-sizing: border-box;
  }
  .img-container img {
    width: 100%;
    display: block;
    user-select: none;
    -webkit-user-drag: none;
  }
  .fixed-btn-wrapper {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    display: flex;
    justify-content: center;
    z-index: 100;
    pointer-events: none;
  }
  .fixed-btn {
    position: static;
    width: calc(100vw - 32px);
    max-width: 600px;
    box-sizing: border-box;
    pointer-events: auto;
    height: 70px;
    background: linear-gradient(90deg, #ff512f, #f9d423);
    color: #fff;
    font-size: 20px;
    font-weight: bold;
    border: none;
    outline: none;
    cursor: pointer;
    z-index: 100;
    box-shadow: 0 -4px 20px 0 rgba(255, 81, 47, 0.3), 0 0 16px 2px #f9d423;
    letter-spacing: 2px;
    border-radius: 18px 18px 0 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: transform 0.15s, box-shadow 0.15s;
    animation: btn-bounce 1.6s infinite cubic-bezier(0.4,0,0.2,1);
    transform-origin: center bottom;
    left: 50%;
    transform: translateX(-50%);
  }
  .fixed-btn:hover {
    transform: scale(1.04);
    box-shadow: 0 -6px 32px 0 rgba(255, 81, 47, 0.5), 0 0 24px 4px #f9d423;
    filter: brightness(1.08);
  }
  .fixed-btn .download-icon {
    width: 32px;
    height: 32px;
    margin-right: 6px;
    vertical-align: middle;
  }
  
  /* Social Media Buttons */
  .social-buttons {
    position: fixed;
    right: 20px;
    bottom: 80px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 101;
  }
  
  .social-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    cursor: pointer;
    transition: transform 0.2s ease;
    border: 3px solid #fff;
  }
  
  .social-btn:hover {
    transform: scale(1.1);
  }
  
  .social-btn img {
    width: 60%;
    height: 60%;
    object-fit: contain;
  }
  
  .social-btn.whatsapp {
    background-color: #25D366;
  }
  
  .social-btn.facebook {
    background-color: #1877F2;
  }
  
  .social-btn.telegram {
    background-color: #0088cc;
  }
  
  .social-btn.tiktok {
    background-color: #000000;
  }
  
  /* Modal styles */
  .modal-mask {
    position: fixed;
    left: 0; top: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .modal-box {
    background: #fff;
    border-radius: 12px;
    padding: 32px 24px 24px 24px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    text-align: center;
    min-width: 260px;
    max-width: 80vw;
    animation: popin 0.2s;
  }
  @keyframes popin {
    from { transform: scale(0.8); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
  }
  .modal-title {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 16px;
    color: #222;
  }
  .modal-btns {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 24px;
  }
  .modal-btn {
    min-width: 80px;
    padding: 10px 0;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.2s;
  }
  .modal-btn.confirm {
    background: linear-gradient(90deg, #ffb300, #ff6f00);
    color: #fff;
  }
  .modal-btn.cancel {
    background: #eee;
    color: #333;
  }
  .modal-btn.confirm:hover {
    background: linear-gradient(90deg, #ff9800, #ff3d00);
  }
  .modal-btn.cancel:hover {
    background: #ddd;
  }

@keyframes btn-bounce {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.08); }
  100% { transform: scale(1); }
}