.section{
    padding: 20px 0;
}

.space {
    height: 70px;
}

#timelinejs {
    min-height: 100vh;
    background-color: black;
}

.iframe-rwd {
    position: relative;
    padding-bottom: 65.25%;
    padding-top: 30px;
    height: 0;
    overflow: hidden;
}
.iframe-rwd iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/*這裡放 Loading */
        /* Center the loader */
        #loading {
          position: absolute;
          left: 50%;
          top: 50%;
          z-index: 1;
          width: 150px;
          height: 150px;
          margin: -75px 0 0 -75px;
          width: 160px;
          height: 160px;
        }

        @-webkit-keyframes spin {
          0% { -webkit-transform: rotate(0deg); }
          100% { -webkit-transform: rotate(360deg); }
        }

        @keyframes spin {
          0% { transform: rotate(0deg); }
          100% { transform: rotate(360deg); }
        }

        /* Add animation to "page content" */
        .animate-bottom {
          position: relative;
          -webkit-animation-name: animatebottom;
          -webkit-animation-duration: 1s;
          animation-name: animatebottom;
          animation-duration: 1.5s
        }

        @-webkit-keyframes animatebottom {
          from { bottom:-100px; opacity:0 } 
          to { bottom:0px; opacity:1 }
        }

        @keyframes animatebottom { 
          from{ bottom:-100px; opacity:0 } 
          to{ bottom:0; opacity:1 }
        }

        #myDiv {
          display: none;
        }