*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #0078d4;
  --primary-dark: #005ea6;
  --bg: #f5f7fb;
  --surface: #fff;
  --text: #24292f;
  --muted: #5f6b7a;
  --border: #dbe3ef;
  --code-bg: #111827;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Microsoft YaHei', 'PingFang SC', Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
}
a { color: var(--primary); }
a:hover { color: var(--primary-dark); }
.hero {
  color: #fff;
  background: radial-gradient(circle at 20% 20%, #29a3ff 0, transparent 28%), linear-gradient(135deg, #0a2540, #0078d4 58%, #1f8b4c);
  padding: 3.5rem 1rem 3rem;
  text-align: center;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.45rem;
  margin-bottom: 1.25rem;
}
.logo img { width: 40px; height: 40px; border-radius: 9px; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1.1; max-width: 920px; margin: 0 auto 1rem; }
.hero p { max-width: 760px; margin: 0 auto; font-size: 1.15rem; opacity: 0.94; }
.lang-switch { margin-top: 1.5rem; display: flex; justify-content: center; gap: 0.5rem; }
.lang-switch button {
  border: 1px solid rgba(255,255,255,0.5);
  background: rgba(255,255,255,0.12);
  color: #fff;
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
}
.lang-switch button[aria-pressed="true"] { background: #fff; color: #0a2540; }
main { max-width: 980px; margin: 2rem auto; padding: 0 1.25rem; }
section, .panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.75rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 8px 24px rgba(20, 40, 80, 0.06);
}
h2 { color: var(--primary); font-size: 1.35rem; margin-bottom: 0.8rem; }
h3 { margin-bottom: 0.45rem; }
p, ul, ol, pre { margin-bottom: 1rem; }
ul, ol { padding-left: 1.4rem; }
li { margin-bottom: 0.45rem; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.card { background: #f7fbff; border: 1px solid var(--border); border-radius: 12px; padding: 1.2rem; }
.metric { text-align: center; }
.metric strong { display: block; color: var(--primary); font-size: 1.7rem; }
pre { background: var(--code-bg); color: #e5e7eb; border-radius: 12px; padding: 1rem; overflow-x: auto; }
code { font-family: 'SF Mono', Monaco, 'Cascadia Code', Consolas, monospace; }
.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: center; margin-top: 1rem; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.7rem 1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.donate-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.donate-card { text-align: center; }
.donate-card img { width: 240px; max-width: 100%; border-radius: 10px; margin: 1rem auto 0; display: block; }
footer { color: var(--muted); text-align: center; padding: 2rem 1rem; font-size: 0.9rem; }
[data-locale] { display: none; }
[data-locale].active-locale { display: block; }
@media (max-width: 760px) {
  .grid, .donate-grid { grid-template-columns: 1fr; }
  section, .panel { padding: 1.25rem; }
  .hero { padding-top: 2.5rem; }
}