body,
html {
	font-family: Microsoft YaHei;
	height: 100%;
	background-color: #000;
	zoom: 1
}

body,
button,
dd,
div,
dl,
dt,
form,
h1,
h2,
h3,
h4,
h5,
h6,
input,
li,
ol,
p,
td,
textarea,
th,
ul {
	padding: 0;
	margin: 0
}

ol,
ul {
	list-style: none
}

a {
	text-decoration: none
}

img {
	vertical-align: top
}

.cl:after {
	content: "";
	display: block;
	clear: both;
	height: 0;
	overflow: hidden;
	visibility: hidden
}

.cl {
	zoom: 1
}

.fl {
	float: left
}

.fr {
	float: right
}

#app {
    min-height: 100vh;
    max-width: 768px;  /* 设置最大宽度 */
    width: 100%;        /* 宽度100%确保在小屏幕上填满 */
    margin: 0 auto;     /* 水平居中 */ 
}