:root{color-scheme:light;--ink:#172033;--muted:#5e687a;--line:#dce2ea;--surface:#fff;--soft:#f4f7fa;--accent:#243b67;--accent2:#e6edf8;--max:1120px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,"Noto Sans TC",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#f8fafc;line-height:1.7}a{color:inherit}.topbar{max-width:var(--max);margin:auto;padding:18px 24px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;font-size:1.1rem}.brand img{border-radius:10px}.topbar nav{display:flex;flex-wrap:wrap;gap:18px}.topbar nav a,.site-footer a{text-decoration:none;color:var(--muted);font-weight:650}.topbar nav a:hover,.site-footer a:hover{color:var(--accent)}.home-page>main{max-width:var(--max);margin:auto;padding:0 24px 72px}.hero{margin-top:12px;padding:72px clamp(24px,6vw,72px);border-radius:32px;background:linear-gradient(135deg,#17233d,#304c7c);color:white;box-shadow:0 24px 70px rgba(25,42,72,.18)}.hero h1{max-width:780px;font-size:clamp(2.25rem,6vw,4.8rem);line-height:1.08;margin:.2em 0}.lead{max-width:750px;color:#dbe6f7;font-size:1.1rem}.eyebrow{font-size:.76rem;font-weight:850;letter-spacing:.16em;text-transform:uppercase;color:#6d7f9c}.hero .eyebrow{color:#bcd0ef}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.button{display:inline-flex;padding:11px 18px;border:1px solid rgba(255,255,255,.35);border-radius:999px;text-decoration:none;font-weight:800}.button.primary{background:white;color:#1c3157}.section{padding:76px 0 0}.section-head{max-width:720px}.section h2{font-size:clamp(1.7rem,4vw,2.55rem);line-height:1.2;margin:.2em 0 .65em}.tool-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.tool-card{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:26px;box-shadow:0 12px 28px rgba(23,32,51,.05)}.tool-card h3{font-size:1.25rem;margin:.6em 0 .25em}.tool-card p{color:var(--muted)}.tool-card a{color:var(--accent);font-weight:800}.icon{font-size:1.8rem}.split{display:grid;grid-template-columns:1.35fr .9fr;gap:28px;align-items:start}.split p{color:var(--muted)}.note{background:var(--accent2);border-radius:20px;padding:25px}.note a{font-weight:800;color:var(--accent)}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.steps>div{border-top:3px solid var(--accent);padding:20px 4px}.steps b{color:var(--accent);font-size:1.6rem}.steps h3{margin:.2em 0}.steps p{color:var(--muted)}.site-footer{border-top:1px solid var(--line);max-width:var(--max);margin:auto;padding:32px 24px 48px;display:grid;grid-template-columns:1.4fr 1fr auto;gap:28px;color:var(--muted)}.site-footer nav{display:flex;flex-direction:column;gap:6px}.site-footer p{margin:.25em 0}.article-shell{max-width:860px;margin:24px auto 72px;padding:0 24px}.article-hero{padding:48px 0 28px;border-bottom:1px solid var(--line)}.article-hero h1{font-size:clamp(2.1rem,5vw,3.6rem);line-height:1.12;margin:.2em 0}.article-shell article{background:white;border:1px solid var(--line);border-radius:24px;padding:clamp(24px,5vw,52px);margin-top:28px}.article-shell h2{font-size:1.55rem;margin-top:1.7em}.article-shell h2:first-child{margin-top:0}.article-shell h3{margin-top:1.35em}.article-shell p,.article-shell li{color:#445065}.article-shell table{width:100%;border-collapse:collapse}.article-shell th,.article-shell td{text-align:left;padding:12px;border-bottom:1px solid var(--line)}.article-shell .callout{background:var(--soft);border-left:4px solid var(--accent);padding:16px 18px;border-radius:8px}.meta{color:var(--muted);font-size:.9rem}.calc-intro{width:100%;max-width:1180px;padding:12px 8px 16px}.calc-intro h1{font-size:clamp(1.6rem,4vw,2.35rem);line-height:1.15;margin:0 0 6px;color:#1e293b}.calc-intro p{margin:0;color:#64748b;max-width:760px}.seo-content{width:100%;max-width:1180px;margin:24px auto 0;background:white;border:1px solid var(--line);border-radius:22px;padding:clamp(22px,4vw,42px);color:var(--ink)}.seo-content h2{font-size:1.65rem;margin:1.6em 0 .4em}.seo-content h2:first-child{margin-top:0}.seo-content h3{font-size:1.15rem;margin:1.25em 0 .25em}.seo-content p,.seo-content li{color:#4b576b}.seo-content .source-list{font-size:.92rem}.trust-links{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:10px;font-size:.78rem}.trust-links a{color:#64748b}@media(max-width:760px){.topbar{align-items:flex-start}.topbar nav{display:none}.tool-grid,.split,.steps,.site-footer{grid-template-columns:1fr}.hero{padding:48px 24px;border-radius:24px}.section{padding-top:54px}.site-footer{gap:18px}.article-shell{padding:0 16px}.article-shell article{padding:22px}.seo-content{border-radius:16px}}