:root{--bg:#f5f7fb;--card:#fff;--text:#111827;--muted:#6b7280;--line:#e5e7eb;--soft:#f1f3f6;--accent:#11131a;--blue:#2563eb;--good:#14804a;--goodbg:#eaf8ef;--warn:#9a6100;--warnbg:#fff5df;--bad:#a72a22;--badbg:#fff0ef;--shadow:0 16px 42px rgba(31,41,55,.06)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:radial-gradient(900px 500px at 50% -120px,#e4ecff 0,rgba(228,236,255,0) 65%),linear-gradient(180deg,#f8faff 0,#f5f7fb 58%,#f6f8fb 100%);min-height:100vh}.shell{width:min(720px,calc(100% - 28px));margin:0 auto;padding:48px 0 54px}.hero{text-align:center;padding:0 10px 10px}.brand{font-size:12px;letter-spacing:.22em;font-weight:800;color:#858c99}.hero h1{font-size:36px;letter-spacing:-.03em;margin:11px 0 10px}.hero p{margin:0;color:#707784;line-height:1.7;font-size:15px}.card{background:rgba(255,255,255,.98);border:1px solid rgba(226,230,238,.95);border-radius:24px;padding:25px;box-shadow:var(--shadow);margin:18px 0}.query-card{margin-top:24px}.field{margin-bottom:18px}.field label{display:block;font-size:14px;font-weight:750;margin:0 0 9px}.field input,.field textarea{width:100%;border:1px solid #e1e5ec;background:#fbfcfe;color:#111827;border-radius:15px;padding:15px 16px;font-size:15px;line-height:1.45;outline:none;transition:.18s}.field textarea{resize:vertical;min-height:130px}.field input:focus,.field textarea:focus{background:#fff;border-color:#a7afbd;box-shadow:0 0 0 4px rgba(17,24,39,.04)}.btn{border:0;border-radius:15px;padding:14px 18px;font-size:15px;font-weight:780;cursor:pointer;transition:.16s}.btn:active{transform:scale(.992)}.btn:disabled{opacity:.55;cursor:not-allowed}.full{width:100%}.primary{background:#11131a;color:#fff}.soft{background:#eef1f5;color:#171a21}.tiny{padding:9px 12px;border-radius:11px;font-size:12px}.link-btn{border:0;background:transparent;padding:0;color:#3490dc;font-size:13px;font-weight:700;cursor:pointer;margin:3px 0 17px}.product{background:#f4f6f9;border-radius:16px;padding:16px 17px;margin:18px 0 0}.product strong{display:block;font-size:18px;line-height:1.3}.product span{display:block;color:#737b88;font-size:13px;margin-top:7px}.notice{border-radius:15px;padding:13px 15px;margin:15px 0 0;font-size:13px;line-height:1.55}.notice.good{background:var(--goodbg);color:var(--good)}.notice.warn{background:var(--warnbg);color:var(--warn)}.notice.bad{background:var(--badbg);color:var(--bad)}.section-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:15px}.section-head h2{font-size:21px;line-height:1.3;margin:0}.section-head p{margin:6px 0 0;color:var(--muted);font-size:13px;line-height:1.55}.redeem-head{margin-bottom:0}.eyebrow{display:block;color:#8b94a3;font-weight:760;font-size:11px;letter-spacing:.12em;margin-bottom:6px}.pill{display:inline-flex;align-items:center;min-height:28px;padding:5px 10px;border-radius:999px;background:#e7f8ee;color:#147344;font-size:12px;font-weight:750;white-space:nowrap}.pill.warn{background:var(--warnbg);color:var(--warn)}.pill.bad{background:var(--badbg);color:var(--bad)}.gift-title{font-size:24px;line-height:1.25;font-weight:820;margin:3px 0 18px;letter-spacing:-.02em}.meta-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin:-5px 0 18px}.meta-item{background:#f6f7f9;border-radius:12px;padding:11px 12px}.meta-item small{display:block;color:#8a919d;font-size:11px;margin-bottom:4px}.meta-item b{font-size:13px;word-break:break-word}.steps{border-top:1px solid #eef0f3}.step{display:grid;grid-template-columns:56px 1fr;gap:15px;padding:20px 0;border-bottom:1px solid #eef0f3}.step:last-child{border-bottom:0;padding-bottom:4px}.step-num{width:54px;height:54px;border-radius:16px;background:#111827;color:white;display:flex;align-items:center;justify-content:center;font-weight:820;font-size:15px}.step h3{margin:2px 0 7px;font-size:17px}.step p{margin:0;color:#697180;font-size:14px;line-height:1.65}.step-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.step-action{display:inline-flex;align-items:center;justify-content:center;border-radius:12px;padding:10px 14px;background:#2f6fe4;color:#fff;text-decoration:none;font-weight:760;font-size:13px}.step-action.gray{background:#eef1f5;color:#252a33}.mode{display:flex;gap:4px;background:#f0f2f5;padding:4px;border-radius:14px;margin:0 0 17px}.modeBtn{flex:1;border:0;border-radius:11px;padding:11px 8px;background:transparent;color:#737b87;font-weight:720;cursor:pointer}.modeBtn.active{background:#fff;color:#17191f;box-shadow:0 2px 8px rgba(0,0,0,.07)}.help{color:#7a828f;font-size:12px;line-height:1.6;margin-top:7px}.check{display:flex;gap:10px;align-items:center;color:#606875;font-size:13px;margin:-2px 0 17px}.check input{width:19px;height:19px;accent-color:#111827}.result{border-radius:15px;padding:15px 16px;margin-top:16px;font-size:13px;line-height:1.65;word-break:break-word}.result b{font-size:14px}.result.good{background:var(--goodbg);color:#126f40}.result.warn{background:var(--warnbg);color:#875807}.result.bad{background:var(--badbg);color:#99291f}.processing{margin-top:16px;padding:14px 14px;border-radius:15px;background:#fff6e3;color:#865706;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:11px}.processing-dot{width:11px;height:11px;background:#d79513;border-radius:50%;box-shadow:0 0 0 5px rgba(215,149,19,.12)}.processing b{font-size:13px}.processing p{font-size:12px;margin:3px 0 0;line-height:1.45}.security{display:flex;align-items:flex-start;gap:12px;padding:6px 14px;color:#878e99}.security .shield{flex:0 0 28px;width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#e9f8ef;color:#18834e;font-weight:900}.security b{font-size:12px;color:#6f7782}.security p{margin:4px 0 0;font-size:11px;line-height:1.6}.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:#15171d;color:white;border-radius:12px;padding:11px 15px;font-size:13px;box-shadow:0 12px 32px rgba(0,0,0,.2);z-index:20}.hidden{display:none!important}.spinner{display:inline-block;width:14px;height:14px;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:spin .7s linear infinite;vertical-align:-2px;margin-right:7px}@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:560px){.shell{width:100%;padding:34px 12px 45px}.hero{padding:0 7px 8px}.hero h1{font-size:32px}.hero p{font-size:14px}.card{border-radius:22px;padding:20px;margin:15px 0}.gift-title{font-size:21px}.step{grid-template-columns:54px 1fr;gap:12px}.step-num{width:50px;height:50px}.step h3{font-size:16px}.meta-grid{grid-template-columns:1fr}.processing{grid-template-columns:auto 1fr}.processing .btn{grid-column:2;justify-self:start}}