:root {
  --bg: #121513;
  --surface: #1b201d;
  --surface-high: #262e29;
  --stage: #273f33;
  --ink: #f1f3ec;
  --muted: #b3bcb5;
  --accent: #a8dec5;
  --accent-hover: #bfead6;
  --dark-ink: #172115;
  --white: #fff;
  --page-width: 1240px;
  --body-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.7 var(--body-font); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
button, a { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
button:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 6px; }
img { display: block; max-width: 100%; height: auto; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { line-height: 1.25; text-wrap: balance; }
p { text-wrap: pretty; }
::selection { background: var(--accent); color: var(--dark-ink); }
.container { width: min(var(--page-width), calc(100% - 80px)); margin-inline: auto; }
.site-header { min-height: 100px; display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 20px; font-weight: 650; white-space: nowrap; }
.brand img { border-radius: 10px; }
.site-nav { display: flex; align-items: center; gap: 32px; }
.site-nav a, .footer-links a, .back-link { transition: color .2s; }
.site-nav a:hover, .footer-links a:hover, .back-link:hover { color: var(--accent); }
.button { min-height: 54px; display: inline-flex; align-items: center; justify-content: center; gap: 12px; padding: 14px 24px; border: 0; border-radius: 100px; background: var(--accent); color: var(--dark-ink); font-weight: 650; line-height: 1.5; transition: transform .2s, background-color .2s; }
.button:hover { background: var(--accent-hover); transform: translateY(-2px); }
.button:active { transform: translateY(0) scale(.98); }
.button svg { width: 22px; height: 22px; flex-shrink: 0; }
.text-link { display: inline-flex; align-items: center; gap: 10px; padding: 12px 0; }
.text-link:hover { color: var(--accent); }
.section-heading { font-size: clamp(32px, 3.2vw, 46px); font-weight: 600; letter-spacing: -.04em; }
.section-intro { color: var(--muted); margin-top: 20px; max-width: 580px; }
.note { font-size: 16px; color: var(--muted); }
.skip-link { position: absolute; top: -100px; left: 20px; z-index: 10; background: var(--accent); color: var(--dark-ink); padding: 10px 20px; }
.skip-link:focus { top: 12px; }
.svg-library { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon { width: 28px; height: 28px; fill: none; stroke: currentColor; stroke-width: 1.65; stroke-linecap: round; stroke-linejoin: round; }
@media (max-width: 760px) {
  html { scroll-padding-top: 24px; }
  .container { width: calc(100% - 40px); }
  .site-header { min-height: 124px; padding-block: 18px; flex-wrap: wrap; gap: 12px; }
  .brand { font-size: 18px; }
  .site-nav { width: 100%; justify-content: space-between; gap: 10px; font-size: 14px; }
  .site-nav a { padding-block: 6px; }
  .section-heading { font-size: 32px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}