摘要：
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style> *{ margin: 0; padding:0; } body{ background:#006d5c; } .outer{ 阅读全文
摘要：
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style> *{ margin:0; padding:0; box-sizing: border-box; } </style> </he 阅读全文