<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="font-awesome.min.css">
<style>
body {
	 margin: 0 auto;
 	 padding: 0 auto;
}

.topnav {
  overflow: hidden;
   background-color:#41403e; /*พื้นหลัง ใหม่เทา*/  
/*  background-color:#1d364c; /*พื้นหลัง* เก่า */  
}

.topnav a {
  float: left;
  display: block;
  color: #ffffff;  /*สีตัวอักษร*/
  text-align: center;
  padding: 14px 16px;
  text-decoration: none; 

  font-size: 17px;
}

.active {
  background-color: #91845f;   /* ค่าคงที่สี home*/
  color: white;
}

.topnav .icon {
  display: none;
}

.dropdown {
  float: left;
  overflow: hidden;
}

.dropdown .dropbtn {
  font-size: 17px;    
  border: none;
  outline: none;
  color:#F00;
  /*  color: white;  */
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

.dropdown-content a {
  float: none;
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}

.topnav a:hover, .dropdown:hover .dropbtn {
  background-color:#8c2149;  /* สีเมาส์ชี้ */
  color: white;
}

.dropdown-content a:hover {
  background-color: #ddd;
  color: black;
}

.dropdown:hover .dropdown-content {
  display: block;
}

@media screen and (max-width: 1000px) {
  .topnav a:not(:first-child), .dropdown .dropbtn {
    display: none;
  }
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 1000px) {
  .topnav.responsive {position: relative;}
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
  .topnav.responsive .dropdown {float: none;}
  .topnav.responsive .dropdown-content {position: relative;}
  .topnav.responsive .dropdown .dropbtn {
    display: block;
    width: 100%;
    text-align: left;
  }
}
</style>