/* reset + 基础排版 */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background-color: var(--bg);
  /* 低饱和的环境光，代替网格线与分区边框 */
  background-image:
    radial-gradient(1100px 640px at 88% -6%, rgba(255, 159, 196, .13), transparent 62%),
    radial-gradient(900px 600px at -4% 44%, rgba(185, 166, 255, .11), transparent 62%);
  background-repeat: no-repeat;
  color: var(--text-body);
  font-family: var(--font-cn);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, p, ul, ol, dl, dd, figure, blockquote {
  margin: 0;
}
figure { margin: 0; }              /* UA 默认 1em 40px 会顶破窄屏 */
ul, ol { padding-left: 1.25em; }
img, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: var(--brand-2); text-underline-offset: 3px; }
a:hover { color: var(--text); }
button { font: inherit; cursor: pointer; }
[hidden] { display: none !important; }

:focus-visible {
  outline: 2px solid var(--brand-2);
  outline-offset: 3px;
  border-radius: 4px;
}

h1, h2, h3, h4 { color: var(--text); line-height: var(--lh-title); font-weight: 700; letter-spacing: .01em; }
h1 { font-size: var(--fs-display); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); }

.lead { font-size: var(--fs-lead); color: var(--text-body); }
.muted { color: var(--text-muted); }
.small { font-size: var(--fs-sm); }
/* 小标签做成糖果胶囊 */
.label {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  gap: 6px;
  padding: 5px 13px;
  border-radius: var(--r-pill);
  background: rgba(255, 159, 196, .14);
  color: var(--brand-2);
  font-family: var(--font-pixel);
  font-size: var(--fs-label);
  letter-spacing: .08em;
  line-height: 1.5;
  text-transform: uppercase;
}
.pixel { font-family: var(--font-pixel); letter-spacing: .04em; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 10px 16px;
  background: var(--brand);
  color: var(--brand-ink);
  font-weight: 700;
  border-radius: 0 0 var(--r-sm) 0;
}
.skip-link:focus { left: 12px; top: 12px; }

.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;
}

::selection { background: var(--brand); color: var(--brand-ink); }