:root {
  --brand: #A855F7;
  --brand-light: #F3E8FF;
  --brand-dark: #9333EA;
  --slate-800: #1E293B;
  --slate-600: #475569;
  --slate-500: #64748B;
  --slate-400: #94A3B8;
  --slate-200: #E2E8F0;
  --slate-100: #F1F5F9;
}
* { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', 'Microsoft YaHei', sans-serif;
  color: var(--slate-800); background: #FAFAFA; line-height: 1.8; -webkit-font-smoothing: antialiased;
}
header {
  background: white; border-bottom: 1px solid var(--slate-200); padding: 16px 0; position: sticky; top: 0; z-index: 10;
}
header .wrap {
  max-width: 720px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}
header .brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--slate-800); }
header .logo {
  width: 36px; height: 36px; background: var(--brand-dark); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  padding: 9px;
}
header .logo img { width: 100%; height: 100%; display: block; }
header .brand span { font-weight: 700; font-size: 16px; }
header .lang a { font-size: 13px; color: var(--slate-500); text-decoration: none; margin-left: 12px; font-weight: 500; }
header .lang a:hover { color: var(--brand-dark); }
header .lang a.active { color: var(--brand-dark); font-weight: 700; }
main { max-width: 720px; margin: 0 auto; padding: 40px 24px 80px; }
h1 { font-size: 28px; font-weight: 800; margin-bottom: 8px; letter-spacing: -.5px; }
.update { font-size: 14px; color: var(--slate-400); margin-bottom: 40px; }
h2 { font-size: 20px; font-weight: 700; margin: 36px 0 12px; color: var(--slate-800); }
p { font-size: 15px; color: var(--slate-600); margin-bottom: 12px; }
ul { margin: 8px 0 16px 20px; font-size: 15px; color: var(--slate-600); }
li { margin-bottom: 6px; }
.email-box {
  background: white; border: 1px solid var(--slate-200); border-radius: 12px;
  padding: 24px; margin: 24px 0;
  display: flex; align-items: center; gap: 16px;
}
.email-box .icon { font-size: 28px; }
.email-box .email-label { font-size: 13px; color: var(--slate-400); margin-bottom: 2px; }
.email-box a {
  font-size: 18px; font-weight: 600; color: var(--brand-dark);
  text-decoration: none;
}
.email-box a:hover { text-decoration: underline; }
footer {
  text-align: center; padding: 32px 24px; border-top: 1px solid var(--slate-200);
  font-size: 13px; color: var(--slate-400);
}
footer a { color: var(--slate-500); text-decoration: none; }
footer a:hover { color: var(--brand-dark); }