摘要:
css代码: <style type="text/css"> .seconds { height: 50px; background: #eee; line-height: 50px; border-radius: 5px; text-align: center; font-size: 18px; 阅读全文
摘要:
css代码: <style type="text/css"> .seconds{ height:50px; background: #eee; line-height: 50px; border-radius: 5px; text-align: center; font-size: 18px; fo 阅读全文
摘要:
css代码: <style type="text/css"> .a { width: 200px; height: 100px; position: absolute; top: 50%; left: 50%; margin-left: -100px; margin-top: -50px; line 阅读全文