* {
  box-sizing: border-box;
}

html {
  min-width: 0;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-text);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
  line-height: 1.65;
}

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

a:hover {
  color: var(--color-primary);
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

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

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-size: var(--font-2xl);
  line-height: 1.2;
  margin-bottom: var(--space-3);
}

h2 {
  font-size: var(--font-xl);
  line-height: 1.3;
}

h3 {
  font-size: var(--font-lg);
  line-height: 1.35;
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

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