css常用代码块

顶部固定导航栏 | css

    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
    width: 100%;
    height: 48px;
    border-top: 2px solid #fa7d3c;
    box-shadow: 0 0 1px 0px rgba(0,0,0,0.15);
    background: #fff;

 内边距累加消除 | css

div {
    padding: 15px 30px;
    box-sizing：border-box；
}