/* 遮罩层的样式 */
#overlay {
    display: none;
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    background-color: rgba(0, 0, 0, 0) !important;
    z-index: 2147483647 !important; 
}

#overlayDiv {
    width: 100%;
    height: 258px;
    /* background-color: #fff; */
    background-color: rgba(0, 0, 0, 0);
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
}

#overlayButton {
    width: 100px;
    height: 40px;
    background-color: rgb(25,118,210);
    border: none;
    color: rgb(255, 255, 255);
    font-size: 18px;
    cursor: pointer;
    border-radius: 5px;
    /* 使用绝对定位 */
    position: absolute;
    /* top: 50%;
    left: 50%;
    transform: translate(-50%, -50%); */
    left: 50%;
    transform: translateX(-50%);
    /* top: 308px; */
    top: calc(50% + 70px);
}

/* 动态按钮效果 */
@keyframes pulse {
    0% {
      transform: scale(1);
    }
  
    50% {
      transform: scale(1.1);
    }
  
    100% {
      transform: scale(1);
    }
  }
  
  #button_nineseven_start {
    margin: 20px auto 1px;
    position: relative;
    background: #9e9e9e;
    display: block;
    width: 65%;
    color: white;
    border-radius: 15px;
    border-width: 0px;
    height: 60px;
  
    box-shadow:
      0 6px 12px rgba(0, 0, 0, 0.30),
      /* 外层阴影，颜色较浅 */
      0 6px 12px rgba(0, 0, 0, 0.8);
    /* 内层阴影，颜色较深 */
    /* transition: all 0.3s ease-in-out; 平滑过渡效果 */
  
    /* 应用动画，持续2秒，无限循环 */
    /* animation: pulse 2s infinite;  */
  
    animation-delay: 10s;
    animation-name: pulse;
    animation-duration: 2s;
    animation-iteration-count: infinite;
  }