/* ============================================
   BASE —— normalize + body 默认 + 字体加载
   字体已自托管，禁止改回 CDN
   ============================================ */

@import url("/site/assets/fonts/fonts.css");

*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-cn);
  background: var(--paper);
  color: var(--ink);
  font-size: var(--fs-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "tnum" 0;
}

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

button {
  font: inherit;
  cursor: pointer;
}

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

.tnum, .mono {
  font-feature-settings: "tnum" 1;
}

.mono {
  font-family: var(--font-mono);
}

.container {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}