CSS

button {
      margin: 1px;
    }
    .custom-btn {
      width: 130px;
      height: 40px;
      color: #fff;
      border-radius: 5px;
     /*padding: 10px 25px;*/
      font-family: 'Lato', sans-serif;
      font-weight: 500;
      background: transparent;
      cursor: pointer;
      transition: all 0.3s ease;
      position: relative;
      display: inline-block;
       box-shadow:inset 2px 2px 2px 0px rgba(255,255,255,.5),
       7px 7px 20px 0px rgba(0,0,0,.1),
       4px 4px 5px 0px rgba(0,0,0,.1);
      outline: none;
    }
    
    .btn-1 {
      border: none;
      color: #000;
    }
    .btn-1:after {
      position: absolute;
      content: "";
      width: 0;
      height: 100%;
      top: 0;
      left: 0;
      direction: rtl;
      z-index: -1;
      box-shadow:
       -7px -7px 20px 0px #fff9,
       -4px -4px 5px 0px #fff9,
       7px 7px 20px 0px #0002,
       4px 4px 5px 0px #0001;
      transition: all 0.3s ease;
    }
    .btn-1:hover {
      color: #000;
    }
    .btn-1:hover:after {
      left: auto;
      right: 0;
      width: 100%;
    }
    .btn-1:active {
      top: 2px;
    }

html

<button style="display:block;margin:0 auto" onclick="window.open('https://mdzz.plus')" class="custom-btn btn-1">这是按钮</button>

示例