:root{font-synthesis:none;color:#20242c;letter-spacing:0;background:#f5f7fa;font-family:PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed}button:focus-visible{outline-offset:4px;outline:3px solid #8db6ff}a:focus-visible{outline-offset:4px;outline:3px solid #8db6ff}.checkout-shell{background:#fff;flex-direction:column;width:min(100%,520px);min-height:100dvh;margin:0 auto;display:flex}.brand-bar{border-bottom:1px solid #eef0f3;justify-content:space-between;align-items:center;min-height:76px;padding:20px 28px;font-size:13px;display:flex}.brand-bar a{color:#20242c;align-items:center;gap:9px;font-size:18px;font-weight:650;text-decoration:none;display:flex}main{flex:1;min-width:0}.muted{color:#747b87}.merchant-band{align-items:center;gap:14px;padding:32px 28px 26px;display:flex}.store-symbol{color:#356cce;background:#eef4ff;border-radius:8px;flex-shrink:0;place-items:center;width:52px;height:52px;display:grid}.merchant-heading{min-width:0}h1{overflow-wrap:anywhere;margin:0;font-size:20px;font-weight:650;line-height:1.5}.merchant-heading p{color:#747b87;overflow-wrap:anywhere;margin:4px 0 0;font-size:14px}.amount-band{padding:20px 28px 26px}.amount-band label{color:#565e6b;font-size:14px}.amount-line{font-variant-numeric:tabular-nums;align-items:baseline;gap:8px;min-height:64px;margin-top:16px;display:flex}.amount-line>span{font-size:28px;font-weight:500}.amount-line strong{overflow-wrap:anywhere;min-width:0;font-size:44px;font-weight:600}.amount-line input{color:#20242c;background:0 0;border:0;border-bottom:2px solid #edf0f5;border-radius:0;outline:0;width:100%;min-width:0;padding:0;font-size:44px;font-weight:600}.amount-line input:focus{border-color:#3672dc}.long-amount strong,.long-amount input{font-size:32px}.amount-line input::placeholder{color:#bdc3cd}.amount-line input:disabled{color:#8a929e}.amount-note,.amount-error{overflow-wrap:anywhere;min-height:18px;margin:10px 0 0;font-size:12px}.amount-note{color:#89909b}.amount-error{color:#c83939}.details-band{border-top:8px solid #f5f7fa;padding:12px 28px}.detail-row{justify-content:space-between;align-items:baseline;gap:20px;padding:14px 0;font-size:14px;display:flex}.detail-row>:first-child{flex-shrink:0}.wallet-name{align-items:center;gap:7px;display:flex}.wechat{color:#1c9b60}.alipay{color:#1677ff}.action-band{padding:18px 28px 28px}.availability{color:#855d16;border-top:1px solid #eee9df;align-items:flex-start;gap:9px;padding:14px 0;display:flex}.availability svg{flex-shrink:0;margin-top:2px}.availability strong{font-size:14px;font-weight:500}.availability p{color:#887e6c;margin:5px 0 0;font-size:12px;line-height:1.7}.pay-button{color:#8a94a4;background:#e9edf3;border:0;border-radius:6px;width:100%;height:50px;margin-top:8px;font-size:16px}.session-clock{font-variant-numeric:tabular-nums;color:#8a929e;justify-content:center;align-items:center;gap:6px;font-size:12px;display:flex}footer{padding:24px 20px max(24px, env(safe-area-inset-bottom));color:#99a0ac;justify-content:center;align-items:center;gap:5px;font-size:12px;display:flex}.empty-state{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:380px;padding:40px 28px;display:flex}.state-symbol{color:#6b84aa;padding-bottom:22px}.empty-state p{color:#747b87;font-size:14px;line-height:1.8}.retry-button{color:#356cce;background:#f5f8ff;border:1px solid #d9e2f1;border-radius:6px;justify-content:center;align-items:center;gap:8px;margin-top:22px;padding:12px 26px;display:flex}.retry-button:disabled{color:#8894a5}.reference{color:#99a0ac;overflow-wrap:anywhere;margin-top:28px;font-size:11px}.loading-icon{color:#3672dc;margin-bottom:24px;animation:1.2s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion:reduce){.loading-icon{animation:none}}@media (min-width:700px){.checkout-shell{border:1px solid #e8ebf0;min-height:740px;margin:40px auto}}@media (max-width:360px){.brand-bar,.merchant-band,.amount-band,.details-band,.action-band{padding-left:20px;padding-right:20px}}