修改html標籤ol的默認樣式（counter-increment和counter-reset的用法）

			ol {
			    padding: 0;
			    margin: 0;
			    list-style: none;
			    counter-reset: sectioncounter
			}

			ol > li{
				width: 100%;
				line-height: 30px;
				color: #130b18;
    			font-size: 1.4rem;
			}

			ol > li:before {
			    content: '' counter(sectioncounter) '';
			    counter-increment: sectioncounter;
			    width: 18px;
			    height: 18px;
			    line-height: 18px;
			    text-align: center;
			    display: inline-block;
			    background-color: #e3c690;
			    color: #bc8011;
			    font-size: 1.4rem;
			    border-radius: 50%;
			    margin-right: 2%;
			}

1. counter-reset 屬性設置某個選擇器出現次數的計數器的值。默認爲 0。
2. counter-increment 屬性設置某個選取器每次出現的計數器增量。默認增量是 1。

.list{
	counter-reset:section 1;
}
.list p:before{
	content: counter(section) '. ';
	counter-increment: section;
}
.list p{
	counter-reset:subCounter;
}
.list span{
	display: block;
	margin-left: 3%;
}
.list span:before{
	content: counter(section) '.' counter(subCounter) ' ';
	counter-increment: subCounter;
	background-color: #2AC845;
	color: #fff;
}