:root{color-scheme:light;--ink:#173d35;--muted:#68736c;--cream:#f7f6ee;--line:#d9ddd4;--card:#fff;--accent:#b87927;--soft:#eef2ea}*{box-sizing:border-box}body{margin:0;min-height:100vh;color:var(--ink);background:var(--cream);font-family:system-ui,-apple-system,"Noto Sans TC",sans-serif}header,main,footer{max-width:1120px;margin:auto}header{min-height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 28px;font-size:.86rem;color:var(--muted)}.brand{color:var(--ink);font-size:1.05rem;line-height:1;font-weight:800;text-decoration:none}.brand span{display:block;margin-top:5px;font-size:.55rem;letter-spacing:.14em}main{display:grid;grid-template-columns:1.15fr .85fr;gap:72px;padding:90px 28px 120px;align-items:center}.eyebrow{color:var(--accent);font-weight:800;letter-spacing:.14em;font-size:.74rem}.intro h1{font-size:clamp(2.6rem,5vw,4.7rem);line-height:1.14;margin:12px 0 22px;letter-spacing:-.06em}.intro>p{color:var(--muted);font-size:1.05rem;line-height:1.8}.intro ol{padding-left:22px;color:var(--ink);line-height:2}.card{background:var(--card);padding:42px;border:1px solid var(--line);border-radius:20px;box-shadow:0 18px 70px #173d3510}.card h2{margin:8px 0;font-size:1.65rem}.card h3{margin:32px 0 0;font-size:1rem}.muted,small,.footnote{color:var(--muted);line-height:1.7}.footnote{margin-top:24px;font-size:.8rem}label{display:block;margin-top:20px;font-weight:700;font-size:.9rem}label span{color:var(--muted);font-weight:400}input{width:100%;margin-top:8px;padding:13px;border:1px solid var(--line);border-radius:8px;font:inherit}small{display:block;margin-top:8px;font-size:.78rem}.primary,.secondary{width:100%;margin-top:26px;padding:14px;border:0;border-radius:8px;color:#fff;background:var(--ink);font:inherit;font-weight:750;cursor:pointer}.secondary{margin-top:18px;background:#e8ece6;color:var(--ink)}.primary:disabled,.secondary:disabled{opacity:.55;cursor:progress}#status{min-height:1.5em;margin:0 0 18px;color:var(--muted);font-size:.9rem}#status[data-error="true"]{color:#a53a28}.tabs{display:flex;gap:6px;border-bottom:1px solid var(--line);margin-bottom:26px}.tab,.text-button{border:0;background:transparent;color:var(--muted);font:inherit;cursor:pointer}.tab{padding:10px 12px;font-weight:700}.tab.active{color:var(--ink);border-bottom:2px solid var(--accent)}.member-heading{display:flex;justify-content:space-between;align-items:start}.text-button{padding:9px 0;text-decoration:underline}.code-card{margin:26px 0 20px;padding:18px;border-radius:10px;background:var(--soft)}.code-card p{margin:0}.code-card output{display:block;margin:10px 0 0;font-size:1.3rem;font-weight:800;letter-spacing:.07em}.code-card .primary{margin-top:16px}.summary{display:grid;grid-template-columns:1fr 1fr;gap:1px;margin:0;background:var(--line);border:1px solid var(--line);border-radius:10px;overflow:hidden}.summary div{padding:14px;background:#fff}.summary dt{font-size:.75rem;color:var(--muted)}.summary dd{margin:5px 0 0;font-weight:800}.referral-list ul{padding-left:20px;line-height:2}.referral-list li{border-bottom:1px solid var(--line);padding:7px 0;font-size:.9rem}footer{border-top:1px solid var(--line);padding:26px 28px;color:var(--muted);font-size:.78rem;text-align:center}@media(max-width:760px){header{padding:0 20px}main{grid-template-columns:1fr;gap:38px;padding:46px 20px 80px}.card{padding:28px 22px}.intro h1{font-size:2.85rem}}