p.small{
    font-size: 10px;
  }
  
ul.topnav {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #ffe4c4;
}

ul.topnav li {
  float: left;
}

ul.topnav li a {
  display: block;
  color: black;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-family: book antiqua;
  
}

ul.topnav li a:hover:not(.active) {background-color: lightblue;}
ul.topnav li a.active {background-color: #ffe4c4;}
ul.topnav li.right {float: right;}
@media screen and (max-width: 600px) {
  ul.topnav li.right, 
  ul.topnav li {float: none;}
}

div {
  width: 200px;
  height: 50px;
  overflow: visible;
}
  div.overflow {
    background-color: #eee;
    width: 0.5px;
    height: 550px;
    border: 1px dotted black;
    overflow: scroll;
  }
.section_top{
  width: 100%;
  height: 100%;
  overflow: hidden;
  position: relative;
  background-image: url(003.jpg);
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  text-align: center;
  justify-content: center;
  animation: change 50s infinite ease-in-out; 
}
.content{
  position: absolute;
  top: 50%
  left: 50%
  transform: translate(-50%, -50%)
}
@keyframes change{
  0%{
    background-image: url(100.jpg);
  }
  20%{
    background-image: url(200.jpg);
  }
  40%{
    background-image: url(300.jpg);
  }
  60%{
    background-image: url(400.jpg);
  }
  80%{
    background-image: url(500.jpg);
  }
  100%{
    background-image: url(600.jpg);
  }

}
body {
  background-color: skyblue;
}
div.gallery {
  border: 1px solid #ccc;
}

div.gallery:hover {
  border: 1px solid #777;
}

div.gallery img {
  width: 1330px;
  height: 600px;
}

div.desc {
  padding: 6px;
  text-align: center;
  font-size: 30px;
}
* {
  box-sizing: border-box;
}

.responsive {
  float: left;
  width: 100%;
  padding-bottom: 750px;
}

@media only screen and (max-width: 700px) {
  .responsive {
    width: 100%;
    margin: 6px 0;
  }
  div.gallery img{
    width: 650px;
    height: 500px;
    padding-bottom: 30px;
  }
}

@media only screen and (max-width: 500px) {
  .responsive {
    width: 100%;
  }
  div.gallery img{
    width: 450px;
    height: 400px;
  }
}

.clearfix:after {
  content: "";
  display: table;
  clear: both;
}