.Block_Orchid-blue {/*蘭色背景 白色文字*/
  background-color: #0099ff; color: #ffffff;
}
.Bar-top, .Bar-bottom{position:fixed;/*固定在相同的位置*/width:100%;/*z-index:1;/*設定區塊的 z軸位置*/} .Bar-top{top:0;} .Bar-bottom{bottom:0;}
.Navigation_Bar { /*background-color:#0099ff; color: #ffffff; padding:15px; float:left; width:20%; 寬度默認為20％ */
  text-align: center;
  width: 100%;
  
}
.Abstract {
  background-color: #e6ffff;/*Light Cyan 淺青色*/
  color: #000d1a;
  border: 0px solid black; margin: 10px; padding: 10px;
  font-size: 18px;
}

body {
  background-color: #F0FFFF; /*Azure-blue*/
  font-family: Arial, sans-serif; /*字型*/
  margin: 0;
}

h1 {text-align: center;}
a{color:#4c00e6;text-decoration:none;/*隱藏底線*/}a:hover{text-decoration:underline;}
footer { /*background-color: #0099ff; color: #ffffff;*/
  padding: 5px; font-size: 10px;
}


ul { list-style-type: none; margin: 0; padding: 0; overflow: hidden;
  background-color: #0099ff;
  position: fixed; top: 0; width: 100%;/*使導航欄保持在頁面頂部*/
}
li { float: left;/*使彼此相鄰滑動*/ border-right: 1px solid #bbb;/*創建分隔符*/}
li a { display: block;/*允許我們指定填充*/ color: white; text-align: center; padding: 5px 16px; text-decoration: none;}
li a:hover { background-color: #111;}


.embed-container {  position: relative; padding-bottom: 50.25%; /*長寬比*/ height: 0;   overflow: hidden; max-width: 100%; 
} 
.embed-container iframe, .embed-container object, .embed-container embed {  position: absolute;   top: 0; left: 10%; width: 80%; height: 90%; 
}