media query

@media screen and (max-width:960px) {
img{
max-width : auto;
height:auto;
}
.flexbox{display:block}
.sponly{display:block;}
.pconly{display:none;}
}
@media only screen and (min-device-width: 601px)and(max-device-width: 959px){...}
@media screen and (max-width: 600px) {...}