:root{--primary:#1a73e8;--primary-dark:#1557b0;--danger:#d93025;--success:#188038;--warning:#f9ab00;--bg:#f5f6fa;--card-bg:#fff;--text:#202124;--text-secondary:#5f6368;--border:#dadce0;--radius:12px;--shadow:0 2px 8px rgba(0,0,0,.08)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--text);min-height:100vh;line-height:1.6}.login-container{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:20px}.login-card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:40px 32px;width:100%;max-width:400px}.login-card h1{text-align:center;font-size:24px;margin-bottom:8px}.login-card .subtitle{text-align:center;color:var(--text-secondary);font-size:14px;margin-bottom:32px}.form-group{margin-bottom:20px}.form-group label{display:block;font-size:14px;font-weight:500;margin-bottom:6px;color:var(--text-secondary)}.form-group input,.form-group select{width:100%;padding:12px 16px;border:2px solid var(--border);border-radius:8px;font-size:16px;outline:none;background:var(--bg);transition:border-color .2s}.form-group input:focus,.form-group select:focus{border-color:var(--primary);background:#fff}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 24px;border:none;border-radius:8px;font-size:16px;font-weight:500;cursor:pointer;transition:all .2s;gap:8px}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{opacity:.9}.btn-success{background:var(--success);color:#fff}.btn-outline{background:transparent;border:2px solid var(--border);color:var(--text)}.btn-outline:hover{border-color:var(--primary);color:var(--primary)}.btn-sm{padding:6px 14px;font-size:14px}.btn-block{width:100%}.btn:disabled{opacity:.5;cursor:not-allowed}.error-msg{color:var(--danger);font-size:14px;margin-top:4px;display:none}.error-msg.show{display:block}.success-msg{color:var(--success);font-size:14px;margin-top:4px;display:none}.success-msg.show{display:block}.main-container{display:none;max-width:800px;margin:0 auto;padding:16px}.main-container.active{display:block}.header{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px 24px;margin-bottom:16px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}.header .user-info h2{font-size:20px}.header .user-info span{font-size:14px;color:var(--text-secondary)}.header .actions{display:flex;gap:8px}.card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;margin-bottom:16px}.card h3{font-size:18px;margin-bottom:16px;padding-bottom:8px;border-bottom:2px solid var(--bg)}.cards-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}.mini-card{padding:16px;border-radius:8px;border:2px solid var(--border);text-align:center}.mini-card.active{border-color:var(--success);background:#f6fef6}.mini-card.empty{border-color:#ccc;background:#fafafa;opacity:.7}.mini-card .card-name{font-weight:600;font-size:15px;margin-bottom:8px}.mini-card .remain{font-size:32px;font-weight:700;color:var(--primary)}.mini-card .total{font-size:12px;color:var(--text-secondary)}.mini-card .expiry{font-size:12px;color:var(--danger);margin-top:4px}.stat-highlight{text-align:center;padding:20px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;border-radius:var(--radius);margin-bottom:16px}.stat-highlight .big-num{font-size:48px;font-weight:700}.stat-highlight .big-label{font-size:16px;opacity:.9}.table-wrapper{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:14px}th,td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--border)}th{background:var(--bg);font-weight:600}tr:hover{background:rgba(26,115,232,.03)}.pagination{display:flex;justify-content:center;align-items:center;gap:8px;margin-top:16px}.pagination span{font-size:14px;color:var(--text-secondary)}.badge{display:inline-block;padding:2px 8px;border-radius:4px;font-size:12px;font-weight:500}.badge-deduct{background:#fce8e6;color:var(--danger)}.badge-revert{background:#e6f4ea;color:var(--success)}.badge-active{background:#e6f4ea;color:var(--success)}.badge-expired{background:#f1f3f4;color:var(--text-secondary)}.hash-row{font-family:'Courier New',monospace;font-size:11px;word-break:break-all;color:var(--text-secondary);display:none;margin-top:4px}.hash-row.show{display:block}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);display:none;justify-content:center;align-items:center;z-index:1000;padding:20px}.modal-overlay.show{display:flex}.modal{background:var(--card-bg);border-radius:var(--radius);padding:32px;width:100%;max-width:480px;max-height:90vh;overflow-y:auto}.modal h3{margin-bottom:20px}.modal .form-group{margin-bottom:16px}.modal .btn-row{display:flex;gap:8px;justify-content:flex-end;margin-top:20px}.toast{position:fixed;top:20px;right:20px;z-index:2000;padding:12px 24px;border-radius:8px;color:#fff;font-weight:500;transform:translateX(120%);transition:transform .3s}.toast.show{transform:translateX(0)}.toast-success{background:var(--success)}.toast-error{background:var(--danger)}.toast-info{background:var(--primary)}.loading{text-align:center;padding:40px;color:var(--text-secondary)}.empty{text-align:center;padding:40px;color:var(--text-secondary);font-size:15px}.detail-row{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--bg);font-size:15px}.detail-row:last-of-type{border-bottom:none}.detail-label{color:var(--text-secondary)}.detail-value{font-weight:500;text-align:right}.link{color:var(--primary);cursor:pointer;text-decoration:underline;font-size:14px}.center-text{text-align:center;margin-top:12px}@media(max-width:768px){.login-card{padding:24px 20px}.header{flex-direction:column;align-items:flex-start}.card{padding:16px}th,td{padding:8px 10px;font-size:13px}}