Tải phần mềm Office 2021 Full body { font-family: Arial, sans-serif; font-size: 18px; background-color: #4285F4; margin: 0; padding: 0; } .container { max-width: 1000px; margin: 0px auto; padding: 20px; } .article-inner { background-color: #fff; border-radius: 10px; padding: 20px;...