#menu {
  background: url("images/mn-bg.jpg") repeat-x scroll 0 0 transparent;
  margin-top: 10px;
  overflow: hidden;
  width: 100%;
}

#menu .submenu {
  background: url("images/bgmenu-blue.jpg") repeat-x scroll left top transparent;
}

#menu .submenu {
  height: 35px;
  line-height: 35px;
  padding: 0 10px;
}

.submenu .content ul li {
  background: url("images/mmline-white.jpg") no-repeat scroll right 4px transparent;
  display: inline;
  float: left;
  font-size: 12px !important;
  line-height: 35px;
  padding: 0 10px 0 0;
}

.animatedtabs {
  clear: both;
  font: 12px;
  overflow: hidden;
  width: 100%;
  color: white;
  position: relative;
  height: 30px;
}

#subTopMenu ul,
.animatedtabs UL {
  margin: 0px;
  padding: 0px;
  list-style: none;
}

.animatedtabs LI {
  float: left;
  height: 35px;
  list-style: none;
}

.animatedtabs A {
  line-height: 35px;
  font-weight: normal;
  color: white;
}

.submenu .content ul li a {
  color: #FFFFFF;
  font-size: 12px;
  font-weight: bold;
  text-decoration: none;
}

.submenu .content ul li.selected a,
.submenu .content ul li.active a {
  color: #FF0000;
}

.animatedtabs span,
.animatedtabs a {
  display: block;
}

.animatedtabs span {
  padding-right: 10px;
}

.animatedtabs a {
  padding-left: 10px;
}

.animatedtabs .selected span {
  /*background: url(img/mainmenu_hover_right.jpg) no-repeat right top;*/
}

.animatedtabs .selected A {
  /*background: url(img/mainmenu_hover_left.jpg) no-repeat left top;*/
  color: red;
}

.subMenuContainer {
  display: none;
}

<!-- Hien thi cac menu con -->#subTopMenu UL {
  margin: 0px;
  padding: 0px;
  list-style-type: none;
  height: 28px;
}

#subTopMenu UL LI {
  float: left;
  margin: 0px 5px;
  padding: 0px 5px;
  list-style-type: none;
  height: 28px;
  background: url("images/ico-red.jpg") no-repeat scroll 0 14px transparent;
}

#subTopMenu UL LI span {
  display: block;
}

#subTopMenu UL LI A {
  padding-right: 5px;
  padding-left: 5px;
  line-height: 28px;
  height: 28px;
  color: #000000;
  display: block;
  font-weight: bold;
}

#subTopMenu UL LI A:hover,
#subTopMenu UL LI.active A {
  color: #be0001;
  text-decoration: underline;
}

#menu {
  border-bottom: 1px solid #000000;
}

#subTopMenu {
  /*background: url(../img/mainmenu_sub.jpg) repeat-x left top;*/
  width: 100%;
  height: 28px;
  line-height: 28px;
  background-color: #ffffff;
}

@media (min-width: 1002px) {
  .navbar-toggler {
    display: none;
  }
}

@media (max-width: 1001px) {
  /* Menu main */
  #menu {
    position: relative;
    z-index: 999;
    margin-top: 0;
    background: transparent;
    border: 0;
  }
  #menu.is-active {
    position: fixed;
    top: 0;
    right: 0;
    height: calc(100vh - 50px);
    margin-top: 0;
    z-index: 999;
    background: transparent;
  }
  #menu .submenu {
    height: auto;
    background: #fff;
    width: 270px;
    position: fixed;
    top: 50px;
    right: 0;
    height: calc(100vh - 50px);
    transform: translateX(270px);
    box-sizing: border-box;
    transition: transform 0.8s ease;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  #menu.is-active .submenu {
    transform: translateX(0);
  }
  .animatedtabs {
    height: auto;
  }
  .submenu .content ul li {
    width: 100%;
    float: none;
    background: none;
    display: block;
  }
  .submenu .content ul li a {
    color: #000;
    font-size: 16px;
  }
  .animatedtabs a {
    padding-left: 0;
  }
  /* Sub menu */
  #subTopMenu {
    height: auto;
  }
  .navbar-toggler {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    box-shadow: none;
    border: 0;
    cursor: pointer;
    background: none;
  }
  .menu-toggle {
    position: relative;
    width: 28px;
    height: 2px;
    background: #258bdd;
    transition-timing-function: cubic-bezier(.55, .055, .675, .19);
    transition-duration: 75ms;
    cursor: pointer;
  }
  .menu-toggle::before,
  .menu-toggle::after {
    display: block;
    content: "";
    background: #258bdd;
    position: absolute;
    width: 28px;
    height: 2px;
  }
  .menu-toggle::before {
    top: -6px;
    transition: top 75ms ease .12s, opacity 75ms ease;
  }
  .menu-toggle::after {
    bottom: -6px;
    transition: bottom 75ms ease .12s, transform 75ms cubic-bezier(.55, .055, .675, .19);
  }
  .menu-toggle.is-active {
    transition-delay: .12s;
    transition-timing-function: cubic-bezier(.215, .61, .355, 1);
    transform: rotate(45deg);
  }
  .menu-toggle.is-active::before {
    top: 0;
    transition: top 75ms ease, opacity 75ms ease .12s;
    opacity: 0;
  }
  .menu-toggle.is-active::after {
    bottom: 0;
    transition: bottom 75ms ease, transform 75ms cubic-bezier(.215, .61, .355, 1) .12s;
    transform: rotate(-90deg);
  }
}