#p1 {
    width: 100%;
    /*拼圖去縫、原本是垂直對齊用*/
    vertical-align: bottom;
}

#p3 {
    float: left;
    width: 70.625%;
}

#p2-1,
#p2-2,
#p2-3 {
    float: right;
    width: 29.375%;
    margin: 0px;
    margin-top: 0px;
}


/*滑鼠滑過選項時，選項變成半透明 hover*/

#p2-1:hover,
#p2-2:hover,
#p2-3:hover {
    opacity: 0.5;
}


/*加入浮動文字跟相對應位置*/

#brain_img {
    position: relative;
}

#brain_text {
    position: absolute;
    left: 6%;
    right: 36%;
}


/*
@keyframes typing {
  from { width: 0 }
}

.typein {
  width: 11em;
  overflow: hidden;
  white-space: nowrap;
  animation: typing 3s steps(11)
}
*/