#cssmenu
 {
width: 1600px;height:400px ;margin: 0 auto; ;
}
.nav{width:1600px; padding-top: 83px; background: #6baddf; height: 300px;;  }
.nav li{width:160px;  float: left;font-weight: bold; text-align: center;}
.nav li a{ font-size: 16px;
  font-family: "Microsoft YaHei";
  color: rgb(255, 255, 255);}
  .nav li ul{ padding-top: 20px; ;}
  .nav li ul li{ height: 40px; line-height: 40px; font-weight:normal}




  #menu-line {
    display: none;
  }
  #cssmenu #menu-button {
    display: block;
    padding: 20px;
    color: #fff;
    cursor: pointer;
    font-size: 12px;
    text-transform: uppercase;  background-color: rgba(7, 58, 106,0.5); width: 30px; position: relative; height: 17px;;  float: right;
  }



  #cssmenu #menu-button::after {
    content: '';
    position: absolute;
    top: 20px;
    right: 20px;
    display: block;
    width: 30px;
    height: 3px;
    background: #fff;
  }
  #cssmenu #menu-button::before {
    content: '';
    position: absolute;
    top: 30px;
    right: 20px;
    display: block;
    width: 30px;
    height: 7px;
    border-top: 3px solid #fff;
    border-bottom: 3px solid #fff;
  }
  #cssmenu .submenu-button {
    position: absolute;
    z-index: 10;
    right: 0;
    top: 0;
    display: block;
    border-left: 1px solid rgba(120, 120, 120, 0.15);
    height: 52px;
    width: 52px;
    cursor: pointer;
  }
  #cssmenu .submenu-button::after {
    content: '';
    position: absolute;
    top: 21px;
    left: 26px;
    display: block;
    width: 1px;
    height: 11px;
    background: #000000;
    z-index: 99;
  }
  #cssmenu .submenu-button::before {
    content: '';
    position: absolute;
    left: 21px;
    top: 26px;
    display: block;
    width: 11px;
    height: 1px;
    background: #000000;
    z-index: 99;
  }
  #cssmenu .submenu-button.submenu-opened:after {
    display: none;
  }