:root{--moss:#3d5a3e;--moss-dark:#2c4230;--gold:#c9a84c;--bark:#8b6f47;--cream:#faf8f4;--sand:#f0ede6;--gray:#888780;--ink:#1a1a18;--danger:#b43f3f;--shadow:0 2px 8px #1a1a1814}*{box-sizing:border-box}html,body,#root{background:var(--cream);min-height:100vh;color:var(--ink);-webkit-font-smoothing:antialiased;margin:0;padding:0;font:18px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Microsoft JhengHei,PingFang TC,Noto Sans TC,sans-serif}#root{max-width:560px;margin:0 auto;padding:16px}h1{color:var(--moss);margin:0 0 8px;font-size:26px}h2{color:var(--bark);margin:0 0 12px;font-size:20px}p{margin:0 0 8px}button{font:inherit;cursor:pointer;border:0;border-radius:12px;min-height:56px;padding:16px 20px;transition:transform 80ms,opacity .15s}button:active{transform:scale(.97)}button:disabled{opacity:.4;cursor:not-allowed}.btn-primary{background:var(--moss);color:#fff;width:100%;font-weight:600}.btn-secondary{background:var(--sand);color:var(--ink)}.btn-gold{background:var(--gold);color:var(--ink);font-weight:600}.card{box-shadow:var(--shadow);background:#fff;border-radius:14px;margin-bottom:14px;padding:20px}.option-grid{grid-template-columns:1fr;gap:12px;display:grid}.option-grid.two-col{grid-template-columns:1fr 1fr}.opt-btn{border:2px solid var(--sand);color:var(--ink);text-align:left;background:#fff;justify-content:space-between;align-items:center;gap:8px;min-height:64px;padding:16px;font-size:18px;display:flex}.opt-btn:hover{border-color:var(--moss)}.opt-btn.selected{border-color:var(--moss);background:var(--cream)}.header{text-align:center;padding:12px 0 20px}.header .subtle{color:var(--gray);font-size:14px}.counter{justify-content:center;align-items:center;gap:16px;padding:8px 0;display:flex}.counter button{background:var(--moss);color:#fff;border-radius:50%;width:56px;height:56px;padding:0;font-size:24px;font-weight:700}.counter .value{color:var(--moss);text-align:center;min-width:80px;font-size:36px;font-weight:700}.fee-input{align-items:center;gap:8px;margin-top:8px;display:flex}.fee-input input{font:inherit;border:2px solid var(--sand);background:#fff;border-radius:10px;flex:1;padding:12px;font-size:20px}.fee-input .unit{color:var(--gray)}.kv-row{border-bottom:1px solid var(--sand);justify-content:space-between;align-items:baseline;padding:6px 0;display:flex}.kv-row:last-child{border-bottom:0}.kv-row .label{color:var(--gray);font-size:14px}.kv-row .value{color:var(--ink);font-weight:500}.success-card{text-align:center;background:var(--moss);color:#fff}.success-card h1{color:#fff;font-size:22px}.success-card .stat{color:var(--gold);margin:12px 0;font-size:32px;font-weight:700}.error-card{text-align:center;border:2px solid var(--danger);color:var(--danger);background:#fff}.error-card h1{color:var(--danger);font-size:20px}.loading{text-align:center;color:var(--gray);padding:40px 0}.footer-action{margin-top:20px}.mock-banner{background:var(--gold);color:var(--ink);text-align:center;border-radius:6px;margin-bottom:12px;padding:6px;font-size:12px}