před 1 rokem · 941879c45f
--- a/css/3_选择器优先级.html
+++ b/css/3_选择器优先级.html
@@ -0,0 +1,41 @@
 
				+<!DOCTYPE html>
			
 
				+<html lang="en">
			
 
				+<head>
			
 
				+    <meta charset="UTF-8">
			
 
				+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
			
 
				+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
			
 
				+    <title>Document</title>
			
 
				+    <style>
			
 
				+        /* #div1{
			
 
				+            background: green;
			
 
				+        } */
			
 
				+        div{
			
 
				+            background: red;
			
 
				+        }
			
 
				+        .aa{
			
 
				+            background: blue;
			
 
				+        }
			
 
				+        /* 优先级 100+10 = 110 */
			
 
				+        #ul2 .list1{
			
 
				+            
			
 
				+        }
			
 
				+        
			
 
				+        
			
 
				+    </style>
			
 
				+</head>
			
 
				+<body>
			
 
				+    <!-- css的选择器优先级的
			
 
				+        id选择器 > class选择器 > 标签选择器  
			
 
				+        100       10            1
			
 
				+
			
 
				+    -->
			
 
				+    <div id="div1" class="aa">111</div>
			
 
				+    <ul id="ul1">
			
 
				+        <li class="list1">1111</li>
			
 
				+        <li>2222</li>
			
 
				+        <li class="list1">3333</li>
			
 
				+        <li>4444</li>
			
 
				+    </ul>
			
 
				+    
			
 
				+</body>
			
 
				+</html>
			
--- a/css/4_基础样式1.html
+++ b/css/4_基础样式1.html
@@ -0,0 +1,36 @@
 
				+<!DOCTYPE html>
			
 
				+<html lang="en">
			
 
				+<head>
			
 
				+    <meta charset="UTF-8">
			
 
				+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
			
 
				+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
			
 
				+    <title>Document</title>
			
 
				+    <style>
			
 
				+        /* 宽高 单位px 像素 */
			
 
				+        div{
			
 
				+            width:800px;
			
 
				+            height:1200px;
			
 
				+            /* background: red; */
			
 
				+
			
 
				+            /* 背景颜色 */
			
 
				+            background-color: red;
			
 
				+            /* 背景图片 */
			
 
				+            background-image:url(./img01.jpeg);
			
 
				+            /* background-repeat:repeat|默认值 no-repeat|不重复; */
			
 
				+            background-repeat:no-repeat;
			
 
				+            /* 背景图片位置:x y;
			
 
				+            x 水平位置  固定值|left center right
			
 
				+            y 垂直位置  固定值|top  center bottom
			
 
				+            */
			
 
				+            background-position: center center ;
			
 
				+        }
			
 
				+    </style>
			
 
				+</head>
			
 
				+<body>
			
 
				+
			
 
				+    <div>
			
 
				+        hjghgfhgfghfhg
			
 
				+    </div>
			
 
				+    
			
 
				+</body>
			
 
				+</html>
			
--- a/images/img01.jpeg
+++ b/images/img01.jpeg