:root{color-scheme:light;--ink:#172b45;--muted:#526579;--accent:#075b9e;--line:#d9e3ec}*{box-sizing:border-box}body{margin:0;background:#f7fafe;color:var(--ink);font-family:system-ui,-apple-system,"Noto Sans TC",sans-serif;font-size:17px;line-height:1.85}main{max-width:850px;margin:0 auto;padding:36px 28px 64px}nav{display:flex;justify-content:space-between;gap:24px;padding-bottom:24px;border-bottom:1px solid var(--line);font-size:15px}a{color:var(--accent);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}a:focus-visible{outline:3px solid #d78600;outline-offset:4px}.eyebrow{margin-top:52px;font-size:14px;letter-spacing:.12em;color:var(--accent);font-weight:700}h1{font-size:clamp(2rem,6vw,3rem);line-height:1.25;letter-spacing:-.03em;margin:14px 0 22px}h2{font-size:1.3rem;margin:0 0 14px;line-height:1.5}.lead{font-size:1.2rem;color:var(--muted)}.meta{font-size:14px;color:var(--muted)}section{margin-top:34px;padding-top:26px;border-top:1px solid var(--line)}p{margin:12px 0}li{margin:12px 0}ul{padding-left:1.35em}footer{margin-top:44px;padding-top:24px;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}@media(max-width:480px){main{padding:24px 20px 48px}nav{font-size:14px}.eyebrow{margin-top:36px}}