reset.css

/* 去掉所有元素的内外边距 */
html, body, div, span,
h1, h2, h3, h4, h5, h6, p, pre,
a, img,  ul, li, form, label, input,
table, tbody, tfoot, thead, tr, th, td,
audio, video {
    margin: 0;
    padding: 0;
}
/* 统一全局字体 */
body {
    font-family: -apple-system-font,BlinkMacSystemFont,"Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei UI","Microsoft YaHei",Arial,sans-serif
}
/* 列表元素去掉默认的列表样式 */
ol, ul {
    list-style: none;
}
/* Table元素的边框折叠 */
table {
    border-collapse: collapse;
    border-spacing: 0;
}
/* 去掉默认的下划线 */
a{
    text-decoration: none;
}
/* 去掉input自带的边缘效果和背景颜色 */
input{
    outline: none;
    background: none;
}