*{
	margin: 0;
	padding: 0;
	font-family: Source Han Sans SC;
	font-weight: 300;
	color: #333;
}
html{
    background: #fff;
}
a{
	color: white;
	text-decoration: none;
}
a:hover{
text-decoration: none;
color: turquoise;
}

/* 弹性布局样式 */
.flex,
.box-flex {
    display: flex;
}

.flex-col {
    flex-direction: column
}

.df-center {
    display: flex;
    align-items: center;
}

.flex-b {
    display: flex;
    justify-content: space-between
}

.flex-m {
    display: flex;
    align-items: center;
}
.flex-bb{
    display: flex;
    align-items: flex-end;
}

.flex-c {
    display: flex;
    justify-content: center
}

.flex-r {
    display: flex;
    flex-direction: row-reverse;
}

.flex-w {
    display: flex;
    flex-wrap: wrap;
}
.flex-nw {
    display: flex;
    flex-wrap: nowrap;
}

.flex-1-v{
    flex: 1;
}
.flex-c-m {
    display: flex;
    justify-content: center;
    align-items: center;
}
.flex-s-m {
    display: flex;
    justify-content: flex-start;
    align-items: center;
}
.flex-s-s {
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
}
.flex-a-m {
    display: flex;
    justify-content: space-around;
    align-items: center;
}
.flex-b-m {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.relative{
    position: relative;
}