@media (prefers-color-scheme: dark) {
    body {
        color: white;
        background: #333;
    }
	a:link {
		color: white;
	}
    a:visited {
		color: white;
	}
	a:hover {
		color: #ccc;
	}
    button {
        background: #444;
    }
}
@media (prefers-color-scheme: light) {
    body {
        color: black;
        background: #eee;
    }
	a:link {
		color: black;
	}
	a:visited {
		color: #333;
	}
	a:hover {
		color: #222;
	}
}
body {
    font-family: 微软雅黑, Arial;
    font-size: 1rem;
}
body {
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
}
a {
	text-decoration: none;
}
a:hover {
	text-decoration: none;
}
a:focus {
	text-decoration: none;
}