.gk-payment-box{background:#fff;border:2px solid #e5e5e5;border-radius:8px;padding:20px;margin:20px 0;box-shadow:0 2px 8px rgba(0,0,0,.05)}.gk-intro h3{margin:0 0 10px;color:#333;font-size:18px}.gk-intro p{margin:8px 0;line-height:1.8;color:#555}.gk-warning{background:#fff8e5;border-right:4px solid #ffb900;padding:10px 15px!important;border-radius:4px;color:#7a5c00!important}#gk-timer{font-size:22px;margin:20px 0 15px;color:#b12704;font-weight:700;text-align:center;padding:15px;background:#fff5f5;border-radius:6px;border:1px dashed #b12704}#gk-upload-form{margin-top:15px;text-align:center}.gk-file-label{display:block;margin-bottom:8px;font-weight:700;color:#333}#gk-receipt-file{margin-bottom:5px}.gk-hint{color:#999;font-size:12px;margin:5px 0 15px!important}#gk-upload-form button{background:#2271b1;color:#fff;border:none;padding:12px 30px;font-size:15px;border-radius:4px;cursor:pointer;transition:background 0.2s}#gk-upload-form button:hover{background:#135e96}#gk-upload-form button:disabled{background:#ccc;cursor:not-allowed}.gk-success{background:#e6ffed;border:1px solid #b7eb8f;border-radius:6px;font-size:16px;padding:20px;margin:20px 0;line-height:1.8;color:#237804}.gk-expired{background:#ffe6e6;border:1px solid #ffa39e;border-radius:6px;font-size:16px;padding:20px;margin:20px 0;line-height:1.8;color:#b12704}#gk-message{margin-top:15px;font-weight:700;text-align:center}