/* ============================================================
   BASE — reset + 基础排版（全站）
   依赖 tokens.css
   ============================================================ */

/* ============ RESET ============ */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  font-size: 100%;
}

/* ============ BASE ============ */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif,
    "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  background: var(--bg);
  color: var(--text);
  line-height: var(--lh-body);
  font-size: var(--font-body);
  padding-top: var(--header-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.container.narrow {
  max-width: var(--narrow-width);
}

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

h1,
h2,
h3,
h4 {
  line-height: var(--lh-heading);
  font-weight: var(--fw-bold);
}

section[id],
.section[id] {
  scroll-margin-top: var(--header-height);
}