.symbol_video{ margin-top:1.5rem; padding-top:1.5rem; border-top:1px dotted #ddd;}
.symbol_video video{ max-width:35rem; width:100%;}

/* media query mobile */
@media (max-width: 1440px) {
}



@media (max-width: 1240px) {
}



@media (max-width: 1024px) {
}



@media (max-width: 768px) {
}



@media (max-width: 580px) {
}



@media (max-width: 480px) {
}



@media (max-width: 380px) {
}