3 回答ul { border:1px solid #000; border-radius:10px; text-shadow:0 6px 2px #000; list-style: none outside none; width: 220px; margin: 20px auto; padding: 0; } ul > li { list-style: none outside none; margin:0; padding: 10px; } ul > li:la

2 回答opacity: 0;

2 回答background-position: left top, 100px 0, 200px 0;

2 回答任務八中的 background-position: 0 0, 30px 30px;

7 回答font:bold 0/50px Arial;