body{
  font-family: "微软雅黑";
  font-weight: bolder;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;/*!!排列顺序是column时，排列属性也要相反操作！！*/
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
}
th{
  background: black;
  color: white;
  text-align: left;
}
.gray{
  background: rgba(121, 121, 121, 0.43);
}
.red{
  color: red;
}
.div1{
  width:60%;
  margin-top: 30px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
}
.div1 input{
  width: 50%;
}
.div1 input:focus{
  width: 100%;
  -webkit-transition: 1s;
  transition: 1s;
}

.carousel{
  position: relative; /*!!必须加相对定位,使其位置固定在pics上面!!*/
  width: 300px;
  height: 150px;
  margin-top: 20px;
  overflow: hidden;
}
.pics{
  position: absolute;/*!!必须加绝对 定位,使其位置固定从左边开始向左滑动!!*/
  left: 0;
  width: 900px;
  height: 150px;
  -webkit-animation: carousel  ease 12s infinite;
          animation: carousel  ease 12s infinite;
}
@-webkit-keyframes carousel{
       0%{ left: 0; }
      28%{ left: 0; }
      35%{ left: -300px; }
      63%{ left: -300px; }
      70%{ left: -600px; }
       98%{ left: -600px; }
       100%{ left: 0; }
     }
@keyframes carousel{
       0%{ left: 0; }
      28%{ left: 0; }
      35%{ left: -300px; }
      63%{ left: -300px; }
      70%{ left: -600px; }
       98%{ left: -600px; }
       100%{ left: 0; }
     }
.pic{
  position: absolute;/*!!必须加绝对 定位,方便后续设置向左滑动!!*/
  /*display: inline-block; */
  width: 300px;
  height: 150px;
}
#one{
  background: green;
  left:0;
}
#two{
  background: blue;
  left:300px;
}
#three{
  background: yellow;
  left:600px;
}
.tag{
       display: inline-block;
       width:30px;
       height: 30px;
       margin:0;
       position: relative;
       top:-30px;
       left: 100px;
       background-color: rgba(0,0,0,0.5);
       color:white;
       line-height: 30px;
       text-align: center;
     }
     .tag1:target{
       left: 0;
     }
     .tag2:target{
       left:0;
     }
     .tag3:target{
       left:0;
     }