:root{--bg: #0b1f3a;--bg-elevated: #122c4f;--bg-card: #ffffff;--bg-muted: #f4f7fb;--text: #0f172a;--text-soft: #475569;--text-invert: #f8fafc;--border: #e2e8f0;--brand: #1463ff;--brand-strong: #0b3fcf;--success: #16a34a;--success-soft: #dcfce7;--warn: #d97706;--warn-soft: #fef3c7;--danger: #dc2626;--danger-soft: #fee2e2;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);--shadow: 0 8px 24px rgba(15, 23, 42, .08);--radius: 12px;--radius-sm: 8px;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;min-height:100%;background:var(--bg-muted);color:var(--text);-webkit-font-smoothing:antialiased}body{background:linear-gradient(180deg,#0b1f3a 0%,#122c4f 280px,var(--bg-muted) 320px,var(--bg-muted) 100%)}a{color:var(--brand)}button{font-family:inherit;cursor:pointer}.app{max-width:920px;margin:0 auto;padding:32px 20px 80px}.app-header{color:var(--text-invert);margin-bottom:28px}.app-header h1{font-size:22px;margin:0 0 6px;letter-spacing:-.01em}.app-header p{margin:0;color:#f8fafcbf;font-size:13px}.app-header .badge{display:inline-block;margin-top:10px;padding:4px 10px;font-size:11px;background:#ffffff1f;border:1px solid rgba(255,255,255,.18);border-radius:999px;color:var(--text-invert)}.checkout-grid{display:grid;grid-template-columns:1fr 360px;gap:24px}@media (max-width: 760px){.checkout-grid{grid-template-columns:1fr}}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.card h2{margin:0 0 4px;font-size:17px}.card .card-sub{margin:0 0 20px;color:var(--text-soft);font-size:13px}.order-row{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px dashed var(--border)}.order-row:last-of-type{border-bottom:0}.order-row .name{font-weight:500}.order-row .desc,.order-row .qty{color:var(--text-soft);font-size:12px;margin-top:2px}.order-row .price{font-variant-numeric:tabular-nums;font-weight:500}.order-total{margin-top:14px;padding-top:14px;border-top:2px solid var(--border);display:flex;justify-content:space-between;align-items:baseline;font-weight:700;font-size:16px}.provider-list{display:flex;flex-direction:column;gap:12px}.provider-option{display:flex;align-items:center;gap:14px;padding:14px 16px;border:1.5px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-card);text-align:left;width:100%;transition:border-color .15s,background .15s,transform .05s}.provider-option:hover:not(:disabled){border-color:var(--brand)}.provider-option[aria-pressed=true]{border-color:var(--brand);background:#1463ff0a;box-shadow:inset 0 0 0 1.5px var(--brand)}.provider-option:disabled{opacity:.5;cursor:not-allowed}.provider-option .logo{width:36px;height:36px;border-radius:8px;background:var(--bg-muted);display:grid;place-items:center;font-weight:700;color:var(--brand-strong);font-size:14px;flex-shrink:0}.provider-option .meta{flex:1;min-width:0}.provider-option .name{font-weight:600;font-size:14px}.provider-option .desc{font-size:12px;color:var(--text-soft);margin-top:2px}.provider-option .tag{font-size:10px;padding:2px 6px;background:var(--bg-muted);border-radius:4px;color:var(--text-soft)}.provider-option .tag.testing{background:var(--warn-soft);color:var(--warn)}.provider-actions{margin-top:20px;padding-top:20px;border-top:1px solid var(--border)}.provider-msg{padding:14px;border-radius:var(--radius-sm);background:var(--bg-muted);color:var(--text-soft);font-size:13px;text-align:center}.provider-msg--error{background:var(--danger-soft);color:var(--danger)}.mock-pay-btn{width:100%;padding:14px 16px;border:0;border-radius:var(--radius-sm);background:var(--brand);color:#fff;font-weight:600;font-size:15px;transition:background .15s}.mock-pay-btn:hover:not(:disabled){background:var(--brand-strong)}.mock-pay-btn:disabled{opacity:.6;cursor:not-allowed}.status-banner{padding:14px 16px;border-radius:var(--radius-sm);font-size:14px;font-weight:500;display:flex;align-items:center;gap:10px}.status-banner--loading{background:var(--bg-muted);color:var(--text-soft)}.status-banner--success{background:var(--success-soft);color:var(--success)}.status-banner--error{background:var(--danger-soft);color:var(--danger)}.status-banner--warn{background:var(--warn-soft);color:var(--warn)}.spinner{width:14px;height:14px;border:2px solid currentColor;border-top-color:transparent;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.result{text-align:center;padding:32px 12px}.result .icon{width:56px;height:56px;border-radius:50%;margin:0 auto 16px;display:grid;place-items:center;font-size:28px;font-weight:700;color:#fff}.result .icon.success{background:var(--success)}.result .icon.fail{background:var(--danger)}.result h2{margin:0 0 6px;font-size:20px}.result p{margin:0 0 8px;color:var(--text-soft);font-size:14px}.result .meta-list{margin:18px auto 0;padding:16px;background:var(--bg-muted);border-radius:var(--radius-sm);font-size:13px;color:var(--text-soft);text-align:left;max-width:360px}.result .meta-list div{display:flex;justify-content:space-between;padding:4px 0}.result .meta-list code{font-variant-numeric:tabular-nums;color:var(--text);background:var(--bg-card);padding:1px 6px;border-radius:4px;font-size:12px}.result .actions{margin-top:24px;display:flex;gap:10px;justify-content:center}.btn{padding:10px 18px;border-radius:var(--radius-sm);border:1.5px solid var(--border);background:var(--bg-card);font-weight:500;font-size:14px;color:var(--text)}.btn:hover{border-color:var(--brand);color:var(--brand)}.btn--primary{background:var(--brand);color:#fff;border-color:var(--brand)}.btn--primary:hover{background:var(--brand-strong);color:#fff}.app-footer{margin-top:32px;color:var(--text-soft);font-size:12px;text-align:center}.app-footer code{background:var(--bg-card);border:1px solid var(--border);padding:1px 6px;border-radius:4px}