header {
  width: 100%;
  .logo {
    height: 116px;
    img {
      display: block;
      height: 66px;
      margin: 25px 0;
    }
  }
  nav {
    position: relative;
    z-index: 99;
    height: 116px;
    &>ul {
      height: 116px;
      &>li {
        float: left;
        position: relative;
        border-top: 3px solid #fff;
        transition: $tr4;
        &>a {
          height: 113px;
          line-height: 113px;
          padding: 0 20px;
          display: block;
          font-size: 16px;
          color: #333333;
          position: relative;
          overflow: hidden;
          transition: $tr4;
        }
        &>ul {
          display: none;
          position: absolute;
          top: 113px;
          left: 0;
          width: 1000px;
          background-color: #009944;
          li {
            float: left;
            a {
              color: #fff;
              display: inline block;
              height: 70px;
              line-height: 70px;
              margin-left: 40px;
              margin-right: 5px;
              font-size: 16px;
              font-weight: bold;
            }
          }
        }
        &:hover {
          transition: $tr4;
          border-top: 3px solid #f3f5f6;
          &>a {
            background-color: #f3f5f6;
            transition: $tr4;
          }
        }
        &.on {
          border-top: 3px solid #009944;
          &>a {
            background-color: #f3f5f6;
          }
        }
      }
    }
  }
}

article {
  margin-top: 0;
}