/* ½¨ÉèÖÐ */
html,body{width: 100%;height: 100%;  }
.dev{ height: 100%;  background:#01B6C9;overflow: hidden;}
.dev img{ display: block; max-width: 100%;margin: 10% auto 0; }
.dev a{ display:block; padding-top: 40px;border:none;}
.dev .back{text-align: center;}
.back a{padding: 10px 25px; font-size: 1.8em;background-color: #EF7D37;color: #fff;display: inline-block;}