:root {
    --site-red: #c9002b;
    --site-red-dark: #c90010;
    --site-text: #172027;
    --site-muted: #5f6d76;
    --site-line: #e8e8e8;
    --site-width: 1200px;
}

* {
    box-sizing: border-box;
}

html {
    min-width: 320px;
    color: var(--site-text);
    background: #f4f6f8;
    font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}

body,
h1,
h2,
h3,
p,
ul,
ol,
dl,
dd {
    margin: 0;
}

body {
    min-height: 100vh;
}

ul,
ol {
    padding: 0;
    list-style: none;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    display: block;
    max-width: 100%;
}

button,
input {
    font: inherit;
}

.site-main {
    width: min(var(--site-width), calc(100% - 32px));
    min-height: 320px;
    margin: 0 auto;
}