*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,system-ui,sans-serif;background:#f5f5f7;color:#111827}#app{min-height:100vh;display:flex;justify-content:center;align-items:stretch}.page{width:100%;max-width:480px;min-height:100vh;background:#fff;box-shadow:0 0 20px #0f172a14;display:flex;flex-direction:column}.page-header{padding:20px 16px 12px;border-bottom:1px solid #e5e7eb}.device-title{font-size:18px;font-weight:600;display:flex;justify-content:space-between;align-items:center}.device-subtitle{margin-top:4px;font-size:12px;color:#6b7280}.status-chip{padding:2px 8px;border-radius:999px;font-size:11px}.status-online{background:#ecfdf3;color:#15803d}.status-offline{background:#fef2f2;color:#b91c1c}.page-body{padding:16px;flex:1;display:flex;flex-direction:column}.section-title{font-size:14px;font-weight:600;margin-bottom:8px}.package-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.package-item{border-radius:12px;border:1px solid #e5e7eb;padding:10px 12px;cursor:pointer;background:#fff;transition:all .15s ease}.package-item.selected{border-color:#2563eb;box-shadow:0 0 0 1px #2563eb1a;background:#eff6ff}.package-name{font-size:14px;font-weight:600}.package-amount{margin-top:2px;font-size:13px;color:#4b5563}.package-coins{margin-top:4px;font-size:12px;color:#6b7280}.env-tip{margin-top:16px;font-size:12px;color:#6b7280;padding:10px 12px;border-radius:8px;background:#f9fafb}.page-footer{padding:12px 16px 16px;border-top:1px solid #e5e7eb;display:flex;flex-direction:column;gap:8px}.pay-button{width:100%;border:none;border-radius:999px;height:44px;font-size:15px;font-weight:600;color:#fff;background:linear-gradient(135deg,#2563eb,#1d4ed8);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:opacity .15s ease,box-shadow .15s ease,transform .05s ease}.pay-button:disabled{opacity:.6;cursor:not-allowed;box-shadow:none}.pay-button:not(:disabled):active{transform:translateY(1px);box-shadow:0 1px 3px #0f172a33}.pay-summary{font-size:12px;color:#4b5563;text-align:center}.toast{position:fixed;left:50%;bottom:70px;transform:translate(-50%);background:#111827eb;color:#f9fafb;padding:8px 12px;border-radius:999px;font-size:12px;max-width:80%;text-align:center;z-index:1000}.result-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a99;display:flex;align-items:center;justify-content:center;z-index:900}.result-card{width:80%;max-width:360px;border-radius:16px;background:#fff;padding:20px 16px 16px;text-align:center}.result-title{font-size:18px;font-weight:700;margin-bottom:8px}.result-text{font-size:13px;color:#4b5563;margin-bottom:16px}.result-button{border:none;border-radius:999px;padding:8px 18px;font-size:13px;font-weight:500;background:#2563eb;color:#fff;cursor:pointer}