创造一个网页

* {

margin: 0;

padding: 0;

box-sizing: border-box;

}

body {

font-family: Arial, sans-serif;

}

.container {

display: flex;

justify-content: center;

align-items: center;

height: 00vh;

background-color: #f0f0f0;

}

.note {

background-color: #fff;

padding: 20px;

border-radius: 5px;

margin-bottom: 20px;

text-align: center;

}

.note h {

margin-top: 0;

}

@media (max-width: 768px) {

.note {

padding: 0px;

}

}

```