$blue: #3190e8;  
$bc: #e4e4e4;
$fc:#fff;

// 背景图片地址和大小
@mixin bis($url) { 
	background-image: url($url);
	background-repeat: no-repeat;
	background-size: 100% 100%;
}

//定位上下左右居中
@mixin center {  
	position: absolute;
	top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

//定位上下居中
@mixin ct {  
	position: absolute;
	top: 50%;
    transform: translateY(-50%);
}

//定位上下居中
@mixin cl {  
	position: absolute;
	left: 50%;
    transform: translateX(-50%);
}

//宽高
@mixin wh($width, $height){
	width: $width;
	height: $height;
}

//字体大小、行高、字体
@mixin font($size, $line-height, $family: 'Microsoft YaHei') {  
	font: #{$size}/#{$line-height} $family;
}

//字体大小，颜色
@mixin sc($size, $color){
	font-size: $size;
	color: $color;
}

//flex 布局和 子元素 对其方式
@mixin fj($type: space-between){
	display: flex;
	justify-content: $type;

}