html {
    overflow-y: scroll;
    color: #000;
    background: #fff;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

html * {
    outline: 0;
    -webkit-text-size-adjust: none;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

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;
}

input, select, textarea {
    font-size: 100%;
}

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

fieldset, img {
    border: 0;
}

abbr, acronym {
    font-variant: normal;
    border: 0;
}

del {
    text-decoration: line-through;
}

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

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: -.5em;
}

sub {
    bottom: -.25em;
}

ins, a {
    text-decoration: none;
}

html, body {
    font-family: -apple-system, SF UI Text, Arial, PingFang SC, Hiragino Sans GB, Microsoft YaHei, WenQuanYi Micro Hei, sans-serif;
    height: 100vh;
    background-color: #fff;
    -webkit-overflow-scrolling: touch;
}

img {
    display: block;
}

.group:before, .group:after {
    display: table;
    content: '';
}

.group:after {
    clear: both;
}

.left {
    float: left;
}

.right {
    float: right;
}

.show {
    display: block;
}

.hide {
    display: none;
}

.oflow-hd {
    overflow: hidden;
}

.position-relative {
    position: relative;
}