/* 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;
	border: 0;
}
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
}
input[type="number"]{
  -moz-appearance: textfield;
}
button {
	border: 0;
	background: none;
	outline: none;
}