:root{--ink:#152341;--muted:#64748b;--line:#e3e9f1;--blue:#2563eb;--bg:#f4f7fc;--red:#b42318;--green:#15803d;--shadow:0 10px 35px #172d5110;font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}*{box-sizing:border-box}body{margin:0}a{color:var(--blue);text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea{outline-offset:4px}button{cursor:pointer}button:disabled{opacity:.6;cursor:wait}[hidden]{display:none!important}.site-header{height:84px;padding:0 max(5vw,24px);display:flex;align-items:center;justify-content:space-between;background:#ffffffcc;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);font-size:19px;font-weight:750;letter-spacing:.04em}.brand-icon{display:grid;place-items:center;width:38px;height:38px;color:white;background:var(--blue);border-radius:12px;font-size:28px;line-height:1}.brand 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var(--line);margin-bottom:22px}.tab{flex:1;padding:12px;border:0;background:none;color:var(--muted);font-weight:650}.tab.selected{color:var(--blue);box-shadow:0 2px 0 var(--blue)}.redeem-card{display:grid;grid-template-columns:1fr 1.5fr;gap:32px;align-items:center;margin-bottom:32px}.redeem-card h2{margin:10px 0}.redeem-card p{margin-bottom:0}.input-action{display:flex;gap:10px}.input-action input{flex:1}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px}.section-heading h2{margin:0}.section-heading .help{margin:0}.service-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.service-card{position:relative}.service-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.service-name{display:flex;align-items:center;gap:12px}.service-name 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