* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f5f5f7;
  color: #1d1d1f;
  line-height: 1.6;
}
.wrap { max-width: 680px; margin: 0 auto; padding: 40px 24px 80px; }

.site-nav { text-align: center; font-size: 0.85rem; margin-bottom: 14px; }
.site-nav a { color: #6e6e73; text-decoration: none; margin: 0 8px; }
.site-nav a.active { color: #FF6A00; font-weight: 600; }
.site-nav .sep { color: #c7c7cc; }

.lang-switch { display: flex; justify-content: center; gap: 8px; margin-bottom: 40px; }
.lang-switch a {
  font-size: 0.85rem; font-weight: 600; text-decoration: none;
  color: #6e6e73; padding: 6px 14px; border-radius: 999px; background: #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
.lang-switch a.active { color: #fff; background: #FF6A00; }

header.page-header { text-align: center; margin-bottom: 40px; }
h1 { font-size: 1.8rem; font-weight: 700; margin-bottom: 6px; }
.effective { color: #86868b; font-size: 0.88rem; }
.intro { color: #48484a; font-size: 1rem; margin-top: 18px; }

article { background: #fff; border-radius: 16px; padding: 32px 32px; box-shadow: 0 1px 3px rgba(0,0,0,.06); }
article h2 { font-size: 1.1rem; font-weight: 700; margin: 28px 0 10px; }
article h2:first-child { margin-top: 0; }
article p { color: #48484a; font-size: 0.95rem; margin-bottom: 6px; }
article ul { padding-left: 20px; margin: 8px 0; }
article li { color: #48484a; font-size: 0.95rem; margin-bottom: 6px; }
article a { color: #FF6A00; font-weight: 600; text-decoration: none; }
article a:hover { text-decoration: underline; }

.back-link { text-align: center; margin-top: 32px; }
.back-link a { color: #FF6A00; font-weight: 600; text-decoration: none; font-size: 0.95rem; }

footer { text-align: center; margin-top: 48px; color: #86868b; font-size: 0.8rem; }
footer a { color: #86868b; }