1.边框线
<a href="" class="dttw_tp"> <div class="t-top"></div> <div class="t-bottom"></div> <img src="images/n1_xw1.png" alt=""> </a>/* 边框动画 */
a.dttw_tp { position: relative; }
.t-top::before { position: absolute; content: ""; width: 0px; right: 0px; top: 0px; height: 2px; background-color: var(--main-color); -webkit-transition: all .5s ease; -moz-transition: all .5s ease; -ms-transition: all .5s ease; -o-transition: all .5s ease; transition: all .5s ease; }
/* 替换 */
a.dttw_tp:hover .t-top::before { width: 100%; }
.t-top::after { position: absolute; content: ""; right: 0px; top: 0px; width: 2px; height: 0px; background-color: var(--main-color); -webkit-transition: all .5s ease; -moz-transition: all .5s ease; -ms-transition: all .5s ease; -o-transition: all .5s ease; transition: all .5s ease; }
/* 替换 */
a.dttw_tp:hover .t-top::after { height: 100%; }
.t-bottom::before { position: absolute; content: ""; width: 0px; left: 0px; bottom: 0px; height: 2px; background-color: var(--main-color); -webkit-transition: all .5s ease; -moz-transition: all .5s ease; -ms-transition: all .5s ease; -o-transition: all .5s ease; transition: all .5s ease; }
/* 替换 */