Common.css

html {
    color: #2d2d2d;
    background: #f2f4f7;
    -webkit-text-size-adjust: 100% !important;
    -ms-text-size-adjust: 100%;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -o-user-select: none;
    user-select: none;
}
body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,form,fieldset,legend,input,textarea,p,blockquote,th,td,hr,
button,article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section {
    margin: 0;
    padding: 0;
}

article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section {
    display: block;
}

body,
button,
input,
select,
textarea {
    font: 14px/1.5 Arial, \5b8b\4f53;
}

body {
    -webkit-text-size-adjust: 100% !important;
}

input,
select,
textarea {
    font-size: 100%;
    -webkit-appearance: none;
}

input::-webkit-input-placeholder {
    color: #ccc;
}

input::input-placeholder {
    color: #ccc;
}

input {
    overflow: hidden;
    text-overflow: ellipsis;
}

select {
    border: 0;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
}

th {
    text-align: inherit;
}

fieldset,
img {
    border: 0;
}

del {
    text-decoration: line-through;
}

address,
caption,
cite,
code,
dfn,
em,
th,
var {
    font-style: normal;
    font-weight: 500;
}

ol,
ul {
    list-style: none;
}

caption,
th {
    text-align: left;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-size: 100%;
    font-weight: 500;
}

q:before,
q:after {
    content: '';
}

sub,
sup {
    font-size: 75%;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
}

sup {
    top: -0.5em;
}

sub {
    bottom: -0.25em;
}

a:hover,
a:active {
    text-decoration: none;
}

ins,
a {
    text-decoration: none;
}
//0.5px下划线
.el::after{
    position: absolute;
    bottom: 0;
    left: 0px;
    content: '';
    width: -webkit-calc(100%);
    -webkit-transform: scaleY(.5);
    -webkit-transform-origin: left top;
}
@media screen and (max-width: 320px) {
  //媒体查询，兼容小屏机样式
}