常用CSS

/* css reset */
abbr,address,article,aside,audio,b,blockquote,body,canvas,caption,cite,code,dd,del,details,dfn,div,dl,dt,em,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,object,ol,p,pre,q,samp,section,small,span,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,ul,var,video{margin:0;padding:0;border:0;outline:0;font-size:100%;vertical-align:baseline;background:0 0}
body{line-height:1}
article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{display:block}
nav ul{list-style:none}
blockquote,q{quotes:none}
blockquote:after,blockquote:before,q:after,q:before{content:'';content:none}
a{margin:0;padding:0;font-size:100%;vertical-align:baseline;background:0 0}

/* change colours to suit your needs */
ins{background-color:#ff9;color:#000;text-decoration:none}
mark{background-color:#ff9;color:#000;font-style:italic;font-weight:700}
del{text-decoration:line-through}
abbr[title],dfn[title]{border-bottom:1px dotted;cursor:help}
table{border-collapse:collapse;border-spacing:0}
hr{display:block;height:1px;border:0;border-top:1px solid #ccc;margin:1em 0;padding:0}
input,select{vertical-align:middle}

/* 移动端图片 宽高自适应 */
.img-box{
    padding-top: 100%;
    position: relative;
    overflow: hidden;
}
.img{
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    width: 100%;
}

/*滚动条*/
::-webkit-scrollbar {
    /*血槽宽度*/
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-thumb {
    /*拖动条*/
    background-color: #49AEEA;
    border-radius: 4px;
}

::-webkit-scrollbar-track {
    /*背景槽*/
    background-color: #ddd;
    border-radius: 4px;
}

/*去掉表单背景色*/
input:-webkit-autofill {
    -webkit-box-shadow: 0 0 0px 1000px white inset !important;
}

/* 工具类 */
.fl {
    float: left
}

.fr {
    float: right
}

.al {
    text-align: left
}

.ac {
    text-align: center
}

.ar {
    text-align: right
}

.hide {
    display: none
}

/* 清除浮动 */
.clearfix:after,
.clearfix:before {
    content: "";
    display: table;
    clear: both;
}

.clearfix {
    zoom: 1;
}


/* 使用css样式，扩大可点击区域： */
.large{
    position: relative;
}

.large:before{
    content: '';
    position: absolute;
    top: -20rpx;
    bottom: -20rpx;
    left: -20rpx;
    right: -20rpx;
}



/* ----文本行数限制----- */
/* 单行 */
.line-1 {
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}
/* 多行 */
.line-2 {
    -webkit-line-clamp: 2;
}

.line-3 {
    -webkit-line-clamp: 3;
}

.line-4 {
    -webkit-line-clamp: 4;
}

.line-5 {
    -webkit-line-clamp: 5;
}

/*flex布局 父级元素加overflow: hidden*/
.line-2, .line-3, .line-4, .line-5 {
    min-width: 0; 
    overflow: hidden;
	  word-break: break-all;
    text-overflow: ellipsis; 
    display: -webkit-box; /* 弹性伸缩盒 */
    -webkit-box-orient: vertical; /* 设置伸缩盒子元素排列方式*/
}
/* ----文本行数限制----- */


.cursor{
    cursor: pointer;
}



/********** fle布局 *********/
.flex,
.flex-row,
.flex-column {
    display: flex;
}

/* 水平方向*/
.flex-row {
    flex-direction: row;
}

/* 垂直方向 */
.flex-column {
    flex-direction: column;
}

/* 水平方向换行 */
.flex-row-wrap {
    flex-wrap: wrap;
}

/* 水平方向不换行 */
.flex-nowrap {
    flex-wrap: nowrap;
}


/* 水平方向，起点在右端 */
.flex-row-reverse {
    flex-direction: row-reverse;
}

.flex-row>* {
    display: block;
}

.flex-col {
    /* flex: 1; */
    flex: 1 1 0%;
}

.flex-center {
    align-items: center;
    justify-content: center;
}

.flex-middle {
    align-items: center;
}

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

.flex-bottom {
    align-items: flex-end;
}

.flex-justify-start {
    justify-content: flex-start;
}

.flex-justify-end {
    justify-content: flex-end;
}

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

.flex-justify-space-around {
    justify-content: space-around;
}

.flex-align-start {
    align-content: flex-start;
}

.flex-align-end {
    align-content: flex-end;
}

.flex-align-around {
    align-content: space-around;
}

.flex-align-between {
    align-content: space-between;
}

.flex-col-auto {
    flex: 0 auto;
}
/********** fle布局 *********/

SCSS类

//  定义字体
@for $i from 9 through 40 {
	.font-#{$i} {
		font-size: $i + px;
	}
}

//  定义内外边距，历遍1-60
@for $i from 0 through 60 {
	// 只要双数和能被5除尽的数
	@if $i % 2 == 0 or $i % 5 == 0 {
		// 得出：margin-30或者m-30
		// .margin-#{$i}, .m-#{$i} {
		// 	margin: $i + px!important;
		// }
		
		// 得出：padding-30或者p-30
		// .padding-#{$i}, .p-#{$i} {
		// 	padding: $i + px!important;
		// }
		
		@each $short, $long in l left, t top, r right, b bottom {
			// 缩写版，结果如： m-l-30
			// 定义外边距
			.m-#{$short}-#{$i} {
				margin-#{$long}: $i + px!important;
			}
			
			// 定义内边距
			.p-#{$short}-#{$i} {
				padding-#{$long}: $i + px!important;
			}
			
			// 完整版，结果如：margin-left-30
			// 定义外边距
			// .margin-#{$long}-#{$i} {
			// 	margin-#{$long}: $i + px!important;
			// }
			
			// 定义内边距
			// .padding-#{$long}-#{$i} {
			// 	padding-#{$long}: $i + px!important;
			// }
		}
	}
}