p {
    margin-top: 0;
    margin-bottom: 0;   /* 去掉p标签自带的Margin-外边距*/
}

body {
    margin:0;
    padding-top: 80px;
    padding-left: 100px;
    padding-right: 24px;
    background-color: rgb(250, 250, 250);
    font-size: 14px;
    font-family: Roboto, Arial, Helvetica, sans-serif;  /* 属性的传承，文本属性从外层容器向内层容器传递 */
}