/* ==========================================================================
   基础样式重置 / 归一化
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  /* 1rem = 10px，便于全站使用 rem 控制字号 */
  font-size: 62.5%;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

ul,
ol {
  list-style: none;
}

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

a,
button {
  -webkit-tap-highlight-color: transparent;
}

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.25;
}

table {
  border-collapse: collapse;
  width: 100%;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.screen-reader-text {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  clip-path: inset(50%);
  border: 0;
  word-wrap: normal;
}

.screen-reader-text:focus,
.skip-link:focus {
  position: fixed;
  top: 1.6rem;
  left: 1.6rem;
  z-index: 100000;
  width: auto;
  height: auto;
  margin: 0;
  padding: 0.8rem 1.2rem;
  overflow: visible;
  clip: auto;
  clip-path: none;
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--color-ink);
  box-shadow: var(--shadow-md);
  font-size: var(--fs-sm);
  font-weight: 600;
  text-decoration: none;
}