*{
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.gamebox{
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

.gamediv{
  width: 550px;
  height: 500px;
  background-color: #ffffff;
  border-radius: 10px;
  box-shadow: 0 0 10px #999999;
  padding: 20px;
  margin: 20px;
  overflow-x: hidden;
  overflow-y: auto;
}

.meihua h3{
    color: darkblue;
    margin-bottom: 10px;
}

.meihua div{
    color: deeppink;
    font-size: 14px;
    line-height: 25px;
}

.title{
    text-align:center;
    margin:40px 0;
}

.bth{
    text-align:center;
    margin-bottom: 20px;
}

.bth a{
    text-decoration: none;
    padding: 10px;
    background-color: chocolate;
    color: #fff;
    font-size: 18px;
    font-weight: bold;
}

.gamediv h2{
    text-align:center;
    margin-bottom:40px;
    color:#FF5722;
}

html ::selection {
    background-color: red;
    color: red;
}

html ::-webkit-scrollbar-track {
    width: 100%;
    /* background: rgb(240, 240, 240); */
    border-radius: 2em;
}

html ::-webkit-scrollbar-thumb {
    background-color: #2acdff;
    min-height: 2em;
    border-radius: 2em;
}

html ::-webkit-scrollbar {
    width: 0.5em;
    height: 0.5em;
}