.section_navagation{ position: sticky;  padding-left: 25px; top: 30px; } 

.section_navagation a{font-weight: 600; text-decoration: none; }
.section_navagation a:hover{color: #0b7ecb;}

.blue_info_box{ padding: 25px; height: 300px; border-radius: 20px; }


#hiddenElement {display: none;}
.m-backtotop {
  cursor: pointer;
    position: fixed;
    z-index: 100;
    right: 20px;
    width: 70px;
   bottom: 60px;
   }

.arrows path { 
	stroke: #2994D1;
	fill: transparent;
	stroke-width: 1px;	
	animation: arrow 4s infinite;
	-webkit-animation: arrow 4s infinite; 
}

.sub_nav_link a{color: #000000;}

.sub_nav_link a:hover{color: #fff;}

@keyframes arrow
{
0% {opacity:0}
40% {opacity:1}
80% {opacity:0}
100% {opacity:0}
}

@-webkit-keyframes arrow /*Safari and Chrome*/
{
0% {opacity:0}
40% {opacity:1}
80% {opacity:0}
100% {opacity:0}
}

.arrows path.a1 { padding-right: 30px;
	animation-delay:-1s;
	-webkit-animation-delay:-1s; /* Safari 和 Chrome */
}

.arrows path.a2 {
	animation-delay:-0.5s;
	-webkit-animation-delay:-0.5s; /* Safari 和 Chrome */
}

.arrows path.a3 {	
	animation-delay:0s;
	-webkit-animation-delay:0s; /* Safari 和 Chrome */
}