.m-wrap-nav{
  z-index: 998;
  padding-left: 15px;
  position: fixed;
  top: 0px;
  left: 0px;
  width: 100%;
  height: 75px;
  background: #fff;
  border-bottom: 1px solid #eee;
}

.m-wrap{
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.m-wrap .m-l{
  width: 50vw;
}

.m-wrap .m-l img{
  width: 100%;
}
.m-wrap .m-r{
  height: 100%;
  width: 50px;
  padding: 24.5px 15px 0px 0px;
}

.m-wrap .m-nav-btn{
  position: relative;
  width: 30px;
  height: 20px;
  overflow: hidden;
  display: flex;
}

.bg-black {
  width: 30px;
  height: 2px;
  background: #333;
  position: absolute;
  transition: all ease 0.5s;
}

.bg-black:nth-child(1) {
  top: 0px;
  right: 0;
}

.bg-black:nth-child(2) {
  top: 9px;
  right: 0;
}

.bg-black:nth-child(3) {
  top: 18px;
  right: 0;
}

.m-active .bg-black:nth-child(1) {
  right: -5px;
  transform: translateY(9px) rotate(45deg);
  transition: all ease 0.5s;
}

.m-active .bg-black:nth-child(2) {
  right: -30px;
  transition: all ease 0.25s;
}

.m-active .bg-black:nth-child(3) {
  right: -5px;
  top: 0px;
  transform: translateY(9px) rotate(-45deg);
  transition: all ease 0.5s;
}

.m-subNav{
  transform: translateX(-120vw);
  transition: transform 0.25s ease;
  background: none;
  z-index: 999;
}

.m-subNav-active{
  transform: translateX(0);
  transition: transform 0.25s ease;
  background: rgba(0, 0, 0, 0.4);
}

@media screen and (max-width: 600px) {
  .m-wrap-nav{
    height: 55px;
  }
  .m-wrap .m-r{
    padding: 17.5px 15px 0px 0px;
  }
}