元素选择器 html [color: black; 1 h1 color: red; 1 h2 color: green
元素选择器 html {color: black;} h1 {color: red;} h2 {color: green;}
元素选择器 Plutonium Useful for many applicatons, plutonium can also be dangero Safety Information When handlin plutonium, care must be taken to avoid the for implosion is very real, and must be avoid at all cost This car separate Comments It's best to avoid using plutonium at all if it can be avoided
元素选择器 html {color: black;} h1 {color: red;} h2 {color: green;}
元素选择器 h1, h2 font: medium Arial; 1 p font: large/150% sans-serif icolor: blue, 1
元素选择器 h1, h2 {font: medium Arial;} p {font: large/150% sans-serif;} * {color: blue;}
类选择器 <html> <head> <title> Plutonium/title> <style type="text/css"><- </styl </head> <body <h1>Plutonium</h1> <p class="warning">Useful for many. </p> <h2> Safety Information</h2> span>When handling plutonium.</span> <span>With plutonium </span> <h3 class="warning >Comments </h3> <p>It's best to avoid ..< </html>
类选择器 <html> <head> <title>Plutonium</title> <style type="text/css"><!-- … --></style> </head> <body> <h1>Plutonium</h1> <p class="warning">Useful for many...</p> <h2>Safety Information</h2> <p> <span>When handling plutonium...</span> <span>With plutonium... </span> </P> <h3 class="warning">Comments</h3> <p>It's best to avoid ...</p> </body> </html>
类选择器 p warning font-style: italic; color: redy
类选择器 p.warning {font-style: italic; color: red}