.tool{width:23%;height:150px;display:inline-block;min-width:280px;margin:5px 5px;text-align:center;border:none;background-color:#fff}.tool_title{font-size:20px;font-weight:bolder}.little_title{font-size:15px}.tool_logo{width:50px;vertical-align:middle}.tool_url{text-align:left;font-size:15px;vertical-align:middle;float:left;color:grey}.enter{text-align:right;vertical-align:middle;float:right;font-weight:700}.tool_information{text-align:right;width:90%;margin:0 auto;position:relative;top:40px}.tool_des{position:relative;top:20px;font-weight:700;font-size:15px}.little_des{font-size:10px}@media screen and (max-width:1300px){body{width:90%}.tool{width:30%}#header{width:93%}}@media screen and (max-width:1000px){body{width:90%}.tool{width:45%}#header{width:92%}}@media screen and (max-width:665px){body{width:90%}.tool{width:100%}#header{width:97%}.little_title{font-size:20px}.little_des{font-size:15px}}