header {
    background:url(img/i1.jpg);
    background-size:cover;
    background-position:center;
    min-height:500px;
}

@media screen and (max-width:670px){
  header {
    min-height:500px;
  }
}
h4 {
  align: center;
}
.section{
  padding-top:4vw;
  padding-bottom:4vw;
}

img {
  margin-top:30px;
}

#mobile-menu {
  min-width: 500px;
}
/* Выпадающие меню */
@import url(https://fonts.googleapis.com/css?family=Open+Sans:400,600&subset=latin,cyrillic);
*{box-sizing: border-box;}
body {
  margin: 0;
  font-family: 'Open Sans', sans-serif;
}
nav {
  background: #413F3C;
  position: fixed;
  z-index: 1000;
  background: url(img/i1.jpg) no-repeat;
  background-size: 100%;
}
nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
nav ul:after {
  content: "";
  display: table;
  clear: both;
}
nav a {
  text-decoration: none;
  display: block;
  transition: .3s linear;
}
.topmenu > li {
  float: left;
  position: relative;
}
.topmenu > li:first-child {border-left: 0;}
.topmenu > li > a {
  font-size: 12px;
  text-transform: uppercase;
  color: #FEFDFD;
  letter-spacing: 2px;
}
.topmenu > li > a.active,
.submenu a:hover {color: #ddbe86;}
.topmenu .fa,
.submenu .fa {
  margin-left: 5px;
  color: inherit;
}
.submenu {
  position: absolute;
  z-index: 5;
  min-width: 200px;
  background: white;
  border-top: 1px solid #CBCBCC;
  border-left: 1px solid #CBCBCC;
  border-right: 1px solid #CBCBCC;
  visibility: hidden;
  opacity: 0;
  transform-origin: 0% 0%;
  transform: rotateX(-90deg);
  transition: .3s linear;
}
.submenu li {position: relative;}
.submenu li a {
  color: #282828;
  padding: 10px 20px;
  font-size: 13px;
  border-bottom: 1px solid #CBCBCC;
}
.submenu .submenu {
  position: absolute;
  left: 100%;
  top: -1px;
  transition: .3s linear;
}
nav li:hover > .submenu {
  transform: rotateX(0deg);
  visibility: visible;
  opacity: 1;
}