:root {
  color-scheme: light;
  --ink: #253238;
  --muted: #65747a;
  --line: #dce7e8;
  --paper: #ffffff;
  --accent: #157b80;
  --wash: #eff8f6;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: linear-gradient(145deg, var(--wash), #fff 40%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", sans-serif;
  line-height: 1.75;
}
main { width: min(900px, calc(100% - 32px)); margin: 40px auto; }
article { background: var(--paper); border: 1px solid var(--line); border-radius: 24px; padding: clamp(24px, 5vw, 56px); box-shadow: 0 14px 42px rgba(27, 73, 77, .08); }
h1 { margin: 0 0 8px; font-size: clamp(30px, 5vw, 46px); line-height: 1.2; }
h2 { margin: 36px 0 8px; font-size: 22px; color: var(--accent); }
h3 { margin: 28px 0 6px; font-size: 18px; }
p, li { font-size: 16px; }
ul { padding-left: 24px; }
.meta { color: var(--muted); margin: 0 0 28px; }
.notice { padding: 16px 18px; border-radius: 14px; background: var(--wash); border-left: 4px solid var(--accent); }
.lang { display: flex; gap: 10px; margin-bottom: 22px; }
.lang a { color: var(--accent); text-decoration: none; border: 1px solid var(--line); border-radius: 999px; padding: 5px 12px; }
a { color: #0a6c9c; overflow-wrap: anywhere; }
footer { color: var(--muted); text-align: center; padding: 22px 0 6px; font-size: 14px; }
@media (max-width: 520px) { main { margin: 16px auto; } article { border-radius: 18px; } }