html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
}

/* 去除超链接默认下划线 */
a {
    text-decoration: none;
    color: black;
}

/* 解决因图片撑起容器高度产生偏差的问题  */
img {
    vertical-align: middle;
}

/* 去除列表项目标号 */
ul,
li {
    list-style: none;
}

/* 去除表单元素的边框和轮廓 */
input,
button,
textarea {
    outline: none;
    border: none;
}

/* 浮动相关 */
.fl {
    float: left;
}

.fr {
    float: right;
}

.clearFix {
    zoom: 1;
}

.clearFix:after {
    content: '';
    display: block;
    height: 0;
    visibility: hidden;
    clear: both;
}

/* 弹性布局 */
.flex-row-col-cen {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

/* 溢出隐藏 */
.overflow {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}