1.The CSS object-position property is used to specify how an or should be positioned within its container. https://www.w3schools.com/css/css3_object-position.asp?goalId=721551e7-cf56-49ab-b572-83f2b5f8ee95 2.按钮样式 https://www.w3schools.com/css/css3_buttons.asp 3.翻页标签样式 https://www.w3schools.com/css/css3_pagination.asp 4.多列布局 https://www.w3schools.com/css/css3_multiple_columns.asp 5.resize outline-offset https://www.w3schools.com/css/css3_user_interface.asp?goalId=721551e7-cf56-49ab-b572-83f2b5f8ee95 6.boxsizing https://www.w3schools.com/css/css3_box-sizing.asp