.box { padding: .5em;}
#chart_sp { width: 100%;}
#chart_img { width: 100%; height: 0; padding-top: 170.34482759%; padding-top: -webkit-calc(2470 / 1450 * 100%); padding-top: calc(2470 / 1450 * 100%); position: relative; background-repeat: no-repeat; background-size: contain;}

/*navi*/
#navi_sp #mn_chart { opacity: .6;}
#navi_sp #mn_chart a { cursor: default; pointer-events: none;}