/* ¾Æħ¼öÇÐ10ºÐ */

.m_math {overflow: hidden; padding: 20px;}
.m_math > li {position: relative; width: 25%; float: left;}
.m_math > li > a {width: 9rem; height: 2.5rem; padding: 0.6rem 0.9rem; font-weight: 600;}
.m_math > li > a > i {padding-left: 4.3rem;}


@media screen and (max-width:850px){ 
   	.m_math > li {width: 50%; float: left;}
	.m_math > li > a {width: 15rem; height: 2.5rem; padding: 0.6rem 0.9rem; font-weight: 600;}
	.m_math > li > a > i {padding-left: 10rem;}   
}

@media screen and (max-width:680px){
	.m_math > li {width: 50%; float: left;}
	.m_math > li > a {width: 13rem; height: 2.5rem; padding: 0.6rem 0.9rem; font-weight: 600;}
	.m_math > li > a > i {padding-left: 8rem;}   
}


@media screen and (max-width:610px){
	.m_math > li {width: 50%; float: left;}
	.m_math > li > a {width: 10rem; height: 2.5rem; padding: 0.6rem 0.9rem; font-weight: 600;}
	.m_math > li > a > i {padding-left: 5rem;}   
}

@media screen and (max-width:500px){ 
    .m_math > li {width: 100%;}
	.m_math > li > a {width: 100%; height: 2.5rem; padding: 0.6rem 0.9rem; font-weight: 600;}
	.m_math > li > a > i {display: none;}   
}