* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 112px; }
body { margin: 0; background: var(--background); color: var(--ink); font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif; font-size: 15px; line-height: 1.7; letter-spacing: 0; }
button, input, select, textarea { font: inherit; }
button, a, input, select, textarea { -webkit-tap-highlight-color: transparent; }
button, select, summary { cursor: pointer; }
button { color: inherit; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--primary-deep); }
button, a { touch-action: manipulation; }
button { border: 0; }
button:disabled { cursor: default; opacity: .45; }
img { display: block; max-width: 100%; height: auto; }
svg { flex-shrink: 0; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { line-height: 1.45; text-wrap: balance; }
h1 { font-size: 36px; }
h2 { font-size: 23px; }
h3 { font-size: 17px; }
p { color: var(--ink-soft); }
ul, ol { padding-left: 1.4em; }
::selection { background: #DCDDFD; color: #0B0F19; }
:focus-visible { outline: 3px solid var(--primary-deep); outline-offset: 4px; }
[v-cloak], [hidden] { display: none !important; }
.container { width: min(1224px, calc(100% - 80px)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip-link { position: fixed; top: -100px; left: 20px; z-index: 100; padding: 12px 20px; color: var(--ink); background: var(--surface); border: 2px solid var(--primary-deep); }
.skip-link:focus { top: 12px; }
.icon { width: 20px; height: 20px; stroke-width: 1.7; vertical-align: middle; }
.muted { color: var(--text-muted); }
.eyebrow { font-size: 13px; color: var(--primary-deep); display: flex; align-items: center; gap: 8px; }
.pill { font-size: 12px; padding: 3px 9px; border-radius: 4px; background: var(--tint); color: var(--primary-deep); white-space: nowrap; }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 22px; }
.section-heading h2 { display: flex; align-items: center; gap: 10px; }
.section-heading h2::before { content: ""; width: 4px; height: 21px; background: var(--primary); border-radius: 2px; }
.text-link { display: inline-flex; align-items: center; gap: 6px; color: var(--text-muted); font-size: 13px; min-height: 32px; }
.button { min-height: 46px; padding: 11px 20px; border-radius: 5px; display: inline-flex; justify-content: center; align-items: center; gap: 9px; background: var(--primary); color: var(--white); font-size: 14px; font-weight: 600; border: 1px solid transparent; transition: background .18s, box-shadow .18s; }
.button:hover { color: var(--white); background: #5558DD; box-shadow: 0 4px 12px var(--shadow); }
.button.secondary { background: var(--surface); color: var(--ink-soft); border-color: var(--border); }
.button.secondary:hover { border-color: var(--primary-deep); color: var(--primary-deep); }
.icon-button { width: 42px; height: 42px; display: inline-flex; align-items: center; justify-content: center; border-radius: 5px; background: transparent; border: 1px solid var(--border); color: var(--ink-soft); }
.icon-button:hover { background: var(--tint); color: var(--primary-deep); }
.image-frame { background: var(--tint); position: relative; overflow: hidden; }
.image-frame.image-failed::after { content: "概念插图暂不可用"; display: grid; place-items: center; position: absolute; inset: 0; color: var(--text-muted); font-size: 13px; }
.image-frame.image-failed img { visibility: hidden; }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; font-size: 13px; color: var(--text-muted); padding-block: 24px; }
.breadcrumb .icon { width: 14px; height: 14px; }
main { min-height: 55vh; }
section[id], h2[id] { scroll-margin-top: 120px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}