.headert {
	/*font-size: 175%;*/
	/*margin: 0px;
    /*padding: 0 px;*/
}
.headert h1 {
	/*margin: 0px;*/
	font-size: 5.5vmin;
	/*font-size: 300%;*/
	padding: 20px;
	font-weight: normal;
	/*text-transform: uppercase;*/
	text-align: center;
	display: block;
	color: #0075B2;
	/*color: #ffffff;*/
}
.headert p {
	font-size: 2.5vmin;
	/*font-size: 125%;*/
	padding: 0 20px 20px 20px;
	color: #494949; /*#343434; /*#202020;*/
	text-align: justify;
}

header {
  position: relative;
  z-index: 123;
  width: 100%;
  background-image: url('/20221206041410oe_/http://www.bme.cuhk.edu.hk/jchchoi/home/sky_pale.jpg')
  /*background: #004D69;*/
}

.logo {
  position: relative;
  z-index: 123;
  padding: 15px 20px;
  font: 18px;
  float: left;
  width: 15%;
}

.logo a {
  color: #FFF;
  font-weight:bold;
  text-decoration: none;
}

.logo img {
	height: 15px;
}

nav {
  position: relative;
  width: 100%;
  margin: 0 auto;
}

#cssmenu,
#cssmenu ul,
#cssmenu ul li,
#cssmenu ul li a,
#cssmenu #head-mobile {
  border: 0;
  list-style: none;
  line-height: 1;
  display: block;
  position: relative;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

#cssmenu:after,
#cssmenu > ul:after {
  content: ".";
  display: block;
  clear: both;
  visibility: hidden;
  line-height: 0;
  height: 0;
}

#cssmenu #head-mobile {
  display: none;
}

#cssmenu {
  background-color: #7e7e7e;; /*#868686;*/ /*#6e6e6e; /* #4D4D4D;*/
}

#cssmenu > ul > li {
  float: left;
}

#cssmenu > ul > li > a {
  padding: 15px;
  font-size: 17px;
  letter-spacing: 1px;
  text-decoration: none;
  color: #FFF;

}

#cssmenu > ul > li:hover > a,
#cssmenu ul li.active a {
  color: #FFF;
}

#cssmenu > ul > li:hover,
#cssmenu ul li.active:hover,
#cssmenu ul li.active,
#cssmenu ul li.has-sub.active:hover {
  background: #363636!important;
  -webkit-transition: background .3s ease;
  -ms-transition: background .3s ease;
  transition: background .3s ease;
}

#cssmenu > ul > li.has-sub > a {
  padding-right: 30px
}

#cssmenu > ul > li.has-sub > a:after {
  position: absolute;
  top: 22px;
  right: 11px;
  width: 8px;
  height: 2px;
  display: block;
  background: #ddd;
  content: ''
}

#cssmenu > ul > li.has-sub > a:before {
  position: absolute;
  top: 19px;
  right: 14px;
  display: block;
  width: 2px;
  height: 8px;
  background: #ddd;
  content: '';
  -webkit-transition: all .25s ease;
  -ms-transition: all .25s ease;
  transition: all .25s ease
}

#cssmenu > ul > li.has-sub:hover > a:before {
  top: 23px;
  height: 0
}

#cssmenu ul ul {
  position: absolute;
  left: -9999px
}

#cssmenu ul ul li {
  height: 0;
  -webkit-transition: all .25s ease;
  -ms-transition: all .25s ease;
  background: #333;
  transition: all .25s ease
}

#cssmenu ul ul li:hover {}

#cssmenu li:hover > ul {
  left: auto
}

#cssmenu li:hover > ul > li {
  height: 35px
}

#cssmenu ul ul ul {
  margin-left: 100%;
  top: 0
}

#cssmenu ul ul li a {
  border-bottom: 1px solid rgba(150, 150, 150, 0.15);
  padding: 11px 15px;
  width: 215px;
  font-size: 15px;
  text-decoration: none;
  color: #ddd;
  font-weight: 400;
}

#cssmenu ul ul li:last-child > a,
#cssmenu ul ul li.last-item > a {
  border-bottom: 0
}

#cssmenu ul ul li:hover > a,
#cssmenu ul ul li a:hover {
  color: #fff
}

#cssmenu ul ul li.has-sub > a:after {
  position: absolute;
  top: 16px;
  right: 11px;
  width: 8px;
  height: 2px;
  display: block;
  background: #ddd;
  content: ''
}

#cssmenu ul ul li.has-sub > a:before {
  position: absolute;
  top: 13px;
  right: 14px;
  display: block;
  width: 2px;
  height: 8px;
  background: #ddd;
  content: '';
  -webkit-transition: all .25s ease;
  -ms-transition: all .25s ease;
  transition: all .25s ease
}

#cssmenu ul ul > li.has-sub:hover > a:before {
  top: 17px;
  height: 0
}

#cssmenu ul ul li.has-sub:hover,
#cssmenu ul li.has-sub ul li.has-sub ul li:hover {
  background: #363636;
}

#cssmenu ul ul ul li.active a {
  border-left: 1px solid #333
}

#cssmenu > ul > li.has-sub > ul > li.active > a,
#cssmenu > ul ul > li.has-sub > ul > li.active> a {
  border-top: 1px solid #333
}



@media screen and (max-width:1000px) {
  .headert {
	font-size: 100%;
	}
  .logo {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 46px;
    text-align: center;
    padding: 15px 0 0 0;
	font-size: 18px;
    float: none;
  }
  .logo2 {
    display: none;
  }
  nav {
    width: 100%;
  }
  #cssmenu {
    width: 100%;
  }
  #cssmenu ul {
    width: 100%;
    display: none;
  }
  #cssmenu ul li {
    width: 100%;
    border-top: 1px solid #444;
  }
  #cssmenu ul li:hover {
    background: #363636;
  }
  #cssmenu ul ul li,
  #cssmenu li:hover > ul > li {
    height: auto;
  }
  #cssmenu ul li a,
  #cssmenu ul ul li a {
    width: 100%;
    border-bottom: 0;
  }
  #cssmenu > ul > li {
    float: none;
  }
  #cssmenu ul ul li a {
    padding-left: 25px;
  }
  #cssmenu ul ul li {
    background: #333!important;
  }
  #cssmenu ul ul li:hover {
    background: #363636!important;
  }
  #cssmenu ul ul ul li a {
    padding-left: 35px;
  }
  #cssmenu ul ul li a {
    color: #ddd;
    background: none;
  }
  #cssmenu ul ul li:hover > a,
  #cssmenu ul ul li.active > a {
    color: #fff;
  }
  #cssmenu ul ul,
  #cssmenu ul ul ul {
    position: relative;
    left: 0;
    width: 100%;
    margin: 0;
    text-align: left;
  }
  #cssmenu > ul > li.has-sub > a:after,
  #cssmenu > ul > li.has-sub > a:before,
  #cssmenu ul ul > li.has-sub > a:after,
  #cssmenu ul ul > li.has-sub > a:before {
    display: none;
  }
  #cssmenu #head-mobile {
    display: block;
    padding: 23px;
    color: #ddd;
    font-size: 12px;
    font-weight: 700;
  }
  .button {
    width: 55px;
    height: 46px;
    position: absolute;
    right: 0;
    top: 0;
    cursor: pointer;
    z-index: 12399994;
  }
  .button:after {
    position: absolute;
    top: 22px;
    right: 20px;
    display: block;
    height: 4px;
    width: 20px;
    border-top: 2px solid #dddddd;
    border-bottom: 2px solid #dddddd;
    content: '';
  }
  .button:before {
    -webkit-transition: all .3s ease;
    -ms-transition: all .3s ease;
    transition: all .3s ease;
    position: absolute;
    top: 16px;
    right: 20px;
    display: block;
    height: 2px;
    width: 20px;
    background: #ddd;
    content: '';
  }
  .button.menu-opened:after {
    -webkit-transition: all .3s ease;
    -ms-transition: all .3s ease;
    transition: all .3s ease;
    top: 23px;
    border: 0;
    height: 2px;
    width: 19px;
    background: #fff;
    -webkit-transform: rotate(45deg);
    -moz-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
    -o-transform: rotate(45deg);
    transform: rotate(45deg);
  }
  .button.menu-opened:before {
    top: 23px;
    background: #fff;
    width: 19px;
    -webkit-transform: rotate(-45deg);
    -moz-transform: rotate(-45deg);
    -ms-transform: rotate(-45deg);
    -o-transform: rotate(-45deg);
    transform: rotate(-45deg);
  }
  #cssmenu .submenu-button {
    position: absolute;
    z-index: 99;
    right: 0;
    top: 0;
    display: block;
    border-left: 1px solid #444;
    height: 46px;
    width: 46px;
    cursor: pointer;
  }
  #cssmenu .submenu-button.submenu-opened {
    background: #262626;
  }
  #cssmenu ul ul .submenu-button {
    height: 34px;
    width: 34px;
  }
  #cssmenu .submenu-button:after {
    position: absolute;
    top: 22px;
    right: 19px;
    width: 8px;
    height: 2px;
    display: block;
    background: #ddd;
    content: '';
  }
  #cssmenu ul ul .submenu-button:after {
    top: 15px;
    right: 13px;
  }
  #cssmenu .submenu-button.submenu-opened:after {
    background: #fff;
  }
  #cssmenu .submenu-button:before {
    position: absolute;
    top: 19px;
    right: 22px;
    display: block;
    width: 2px;
    height: 8px;
    background: #ddd;
    content: '';
  }
  #cssmenu ul ul .submenu-button:before {
    top: 12px;
    right: 16px;
  }
  #cssmenu .submenu-button.submenu-opened:before {
    display: none;
  }
  #cssmenu ul ul ul li.active a {
    border-left: none;
  }
  #cssmenu > ul > li.has-sub > ul > li.active > a,
  #cssmenu > ul ul > li.has-sub > ul > li.active > a {
    border-top: none;
  }
}