@keyframes btn {
  0% {
    transform: translateX(0px);
  }
  1% {
    transform: translateX(3px);
  }
  2% {
    transform: translateX(0px);
  }
  3% {
    transform: translateX(-3px);
  }
  4% {
    transform: translateX(0px);
  }
  5% {
    transform: translateX(3px);
  }
  6% {
    transform: translateX(0px);
  }
  7% {
    transform: translateX(-3px);
  }
  8% {
    transform: translateX(0px);
  }
  9% {
    transform: translateX(3px);
  }
  10% {
    transform: translateX(0px);
  }
  11% {
    transform: translateX(-3px);
  }
  12% {
    transform: translateX(0px);
  }
  13% {
    transform: translateX(3px);
  }
  14% {
    transform: translateX(0px);
  }
  15% {
    transform: translateX(-3px);
  }
  16% {
    transform: translateX(0px);
  }
  100% {
    transform: translateX(0px);
  }
}

* {
  box-sizing: border-box; 
  margin: 0;
  padding: 0;
}

ul, ul li {
  list-style-type: none;
}

html, body {
  height: 100%;
  min-height: 100%;
}

a {
  display: block;
  text-decoration: none;
  color:  black;
}

.wrapper {
  min-height: 100%;
  overflow: hidden;
  background: #ce4a91 url('../img/bg.jpg') top center no-repeat;
  -webkit-background-size: cover;
  background-size: cover;
  display: -webkit-flex;
  display: -moz-flex;
  display: -ms-flex;
  display: -o-flex;
  display: flex;
  -webkit-flex-direction: column;
  -moz-flex-direction: column;
  -ms-flex-direction: column;
  -o-flex-direction: column;
  flex-direction: column;
}

.logo {
  position: relative;
  z-index: 1;
  width: 13vw;
  min-width: 175px;
  margin: 20px auto 0;
  margin: 1vw auto 0;
}
.logo img {
  width: 100%;
}

.call img {
  display: block;
  width: 50%;
  margin: -10vw auto;
}

.list {
  width: 100%;
  max-width: 67vw;
  margin: auto auto 0;
  display: -webkit-flex;
  display: -moz-flex;
  display: -ms-flex;
  display: -o-flex;
  display: flex;
}
.list__item {
  position: relative;
  margin: auto;
  width: 22%;
  overflow: hidden;
  -webkit-background-size: cover !important;
  background-size: cover !important;
  -webkit-filter: grayscale(100%);
  -moz-filter: grayscale(100%);
  -ms-filter: grayscale(100%);
  -o-filter: grayscale(100%);
  filter: grayscale(100%);
  transition: .3s ease-in-out;
}
.list__item:before {
  content: "";
  padding-top: 157%;
  float: left;
}
.list__item:nth-child(1) {
  background: url('../img/1.png') center no-repeat;
}
.list__item:nth-child(2) {
  background: url('../img/2.png') center no-repeat;
}
.list__item:nth-child(3) {
  background: url('../img/3.png') center no-repeat;
}
.list__item:nth-child(4) {
  background: url('../img/4.png') center no-repeat;
}
.list__item:hover {
  -webkit-filter: grayscale(1%);
  -moz-filter: grayscale(1%);
  -ms-filter: grayscale(1%);
  -o-filter: grayscale(1%);
  filter: grayscale(1%);
  transform: scale(1.13)
}
.list a {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 5%;
  padding-top: 21%;
  font-size: 24px;
  text-align: center;
}

.btn-wrapper {
  width: 422px;
  height: 107px;
  padding: 0 10px;
  margin: auto;
  animation: btn 3s infinite steps(1);
}
.btn-wrapper:hover {
  animation-play-state: paused;
}
.btn {
  display: block;
  height: 100%;
  background: transparent url('../img/btn.png') top center no-repeat;
  -webkit-background-size: cover !important;
  background-size: cover !important;
  transition: transform .3s ease-in-out;
}
.btn:hover {
  background-position: bottom center;
}
.btn:active {
  transform: scale(.95) translateY(5px);
}


















@media only screen and (max-width: 2000px) {
  .list a {
    font-size: 18px;
  }
}


@media only screen and (max-width: 1600px) {
  .list {
    max-width: 1000px;
  }
  .list a {
    font-size: 15px;
  }
}



@media only screen and (max-width: 1020px) {
  .call img {
    width: 100%;
    margin: -18vw auto;
  }
  .list {
    max-width: 550px;
    -webkit-flex-wrap: wrap;
    -moz-flex-wrap: wrap;
    -ms-flex-wrap: wrap;
    -o-flex-wrap: wrap;
    flex-wrap: wrap;
  }
  .list__item {
    width: 35%;
  }
  .list a {
    font-size: 14px;
  }
}


@media only screen and (max-width: 760px) {
  .list {
    -webkit-order: 1;
    -moz-order: 1;
    -ms-order: 1;
    -o-order: 1;
    order: 1;
  }
  .btn-wrapper {
    margin: 5vw auto;
  }
}

@media only screen and (max-width: 730px) {
  .call img {
    width: 130%;
    margin-left: -15%;
  }
  .list__item {
    width: 300px;
  }
  .list a {
    font-size: 20px;
  }
  .btn-wrapper {
    width: 300px;
    height: 74px;
  }
}
@media only screen and (max-height: 380px) {
  .call img {
    width: 100%;
    margin-left: auto;
  }
  .list {
    -webkit-order: 1;
    -moz-order: 1;
    -ms-order: 1;
    -o-order: 1;
    order: 1;
  }
}