*{
    margin: 0;
    padding: 0;
}
<!--*表示所有-->

.body{
font-family: Arial, Helvetica, sans-serif;
}

.header {
  text-align: center;
  padding: 5px;
  border-bottom: 1px solid #612727;
  width: 95%;
  max-width: 950px;
  margin: auto;
  line-height: 25px;
  .nav{
    width: 100%;
    position: relative;
    z-index: 99;
    min-width: 651px;
  }
  .nav a{
    margin: 0 5% 0 5%;
    color: #612727;
  }
  .nav img{
    width: 70px;
    border-radius: 50%;
    z-index: 1000;
    border: #ffffff solid 4px;
  }
  .h4{
    cursor: pointer;
    position: relative;
    z-index: 99;
  }
}

.normal{
  padding-top: 10px;
  max-width: 990px;
  margin: auto;
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  text-align: left;
  line-height: 25px;
  .content{
    width: 60%;
    max-width: 600px;
    min-width: 405px;
    position: relative;
    .research{
      text-align: justify;
      position: relative;
      z-index: 99;
      .a{
        color: #6905fe;
        text-decoration: none;
      }  
    }
  }
  .img{
    max-width: 400px;
  }
}

.society {
    margin:0;
    padding-bottom: 30px;
    max-width: 1000px;
    display: flex;
    justify-content: space-around;
    margin: auto;
    flex-wrap: wrap;

    .sub{
        width: 95%;
        margin: 0 10px 20px 0;
        text-align: center;
        line-height: 30px;
        padding: 2px;
    }
    .projects {
      width:calc(100% - 40px);
      margin:auto;
      position: relative;
      left:-5px;
      &:before {
        content: '';
        position: fixed;
        top:0px;
        left:50%;
        bottom:0px;
        transform:translateX(-50%);
        width:0px;
        background-color:#fff;
    }
      .project {
        overflow: hidden;
        background-color: rgba(255, 255, 255, 0.5);
        width:calc(50% - 33px);
        float:left; 
        padding:10px;
        clear:both;
        text-align:right;
        border: #333 dotted 1.5px;
        border-radius: 3px;
        &:not(:first-child) {
          margin-top:-80px;
        }
        .title {
          margin-bottom:12px;
          position: relative;
          color:#fff;
          &:before {
            content: '';
            position: absolute;
            width:12px;
            height: 12px;
            border:2px solid #ffffff;
            background-color:#612727;
            border-radius:100%;
            top:80%;
            transform:translateY(-50%);
            right:-16px;
            z-index:1000;
          }
        }
        .title img{
            width: 100px;
            height: 67px;
            border-radius: 20px;
        }
        .main {
            text-align: left;
        }
        &:nth-child(2n) {
          text-align:left;
          float:right;
          .title {
            &:before {
              left:-16px;
            }
          }
        }
      }
    }
  }


.map {
  text-align: center;
  margin: auto;
  max-width: 1000px;
  .sub{
    width: 100%;
    margin: 0 10px 0 0;
    line-height: 30px;
    padding: 2px;
  }
}

.moments{
  text-align: center;
  display: flex;
  justify-content: space-around;
  margin: auto;
  flex-wrap: wrap;
  width: 100%;
  max-width: 800px;
  padding-bottom: 10px;
}
.moments moment{
    float: left;
    width: 380px;
    height: 258px;
    margin: 10px 0 0 10px;
    padding-bottom: 20px;
    border: 1px solid #ffffff;
    border-radius: 1px;
    overflow: hidden;
    background-color: #ffffff;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,.2);
}
.moments moment img{
  overflow: hidden;
  width:360px;
  height: 240px;
  margin: 10px 10px 0 10px;
  opacity: 1;
  object-fit: cover;
  cursor: pointer;
}
.moments moment img:hover{
}
.moments moment p{
    width: 380px;
    line-height: 20px;
    margin: 2px 0 0 10px;
    text-align: center;
}

.tickoffs{
  padding-bottom: 30px;
  text-align: center;
  display: flex;
  justify-content: space-around;
  margin: auto;
  width: 100%;
  max-width: 800px;
  padding-bottom: 10px;}

.tickoffs tickoff{
    float: left;
    width: 362px;
    height: 243px;
    margin: 10px 0 0 10px;
    padding-bottom: 30px;
    border: 1px solid #ffffff;
    border-radius: 1px;
    overflow: hidden;
    background-color: #ffffff;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,.2);
}
.tickoffs tickoff img{
        overflow: hidden;
        width:240px;
        height: 240px;
        margin: 5px 5px 0 5px;
        opacity: 1;
        object-fit: cover;
        cursor: pointer;
}

.wildlife{
  padding-bottom: 30px;
  text-align: center;
  display: flex;
  justify-content: space-around;
  margin: auto;
  width: 100%;
  max-width: 800px;
  padding-bottom: 10px;}

.wildlife life{
    float: left;
    width: 362px;
    height: 243px;
    margin: 10px 0 0 10px;
    padding-bottom: 5px;
    border: 1px solid #ffffff;
    border-radius: 1px;
    overflow: hidden;
    background-color: #ffffff;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,.2);
}
.wildlife life img{
        overflow: hidden;
        width:240px;
        height: 240px;
        margin: 5px 5px 0 5px;
        opacity: 1;
        object-fit: cover;
        cursor: pointer;
}

.running{
    text-align: center;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 900px;
    margin: auto;
    padding-bottom: 20px;
    .sub{
      width: 100%;
      margin: auto;
      line-height: 30px;
      padding: 2px;
    }
}
.running roadmap{
    float: left;
    width: 212px;
    height: 260px;
    margin: 10px 0 0 10px;
    padding-bottom: 20px;
    border: 1px solid #ccc;
    border-radius: 1px;
    overflow: hidden;
    background-color: rgba(255,255,255,.5);
    position: relative;
}
.running roadmap img{
    width:200px;
    margin: 10px 0 0 5px;
    opacity: 0.9;
}
.running roadmap p{
    width: 200px;
    line-height: 20px;
    margin: 5px 10px 10px 5px;
}

.footer {
    background-color: black;
    color: white;
    clear: both;
    text-align: center;
    padding: 5px;
}