:root{--wechat-green:#07C160;--wechat-green-hover:#06ad56;--wechat-bg:#EDEDED;--wechat-white:#FFFFFF;--wechat-border:#E5E5E5;--wechat-text-primary:#333333;--wechat-text-secondary:#888888;--wechat-user-bubble:#95EC69;--wechat-ai-bubble:#FFFFFF;--error-color:#FA5151;--warning-color:#FFC300;--success-color:#07C160;--info-color:#10AEFF}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,sans-serif;font-size:14px;color:var(--wechat-text-primary);background:var(--wechat-bg);line-height:1.5}.btn{display:inline-block;padding:10px 20px;border:none;border-radius:4px;font-size:14px;cursor:pointer;transition:all 0.3s;text-decoration:none;text-align:center}.btn-primary{background:var(--wechat-green);color:white}.btn-primary:hover{background:var(--wechat-green-hover)}.btn-secondary{background:var(--wechat-white);color:var(--wechat-text-primary);border:1px solid var(--wechat-border)}.btn-secondary:hover{background:#f5f5f5}.btn-danger{background:var(--error-color);color:white}.btn-danger:hover{background:#e04444}.btn-small{padding:6px 12px;font-size:12px}.btn-block{width:100%;display:block}.input-group{margin-bottom:15px}.input-group label{display:block;margin-bottom:5px;color:var(--wechat-text-primary);font-weight:500}.input-group input,.input-group select,.input-group textarea{width:100%;padding:10px;border:1px solid var(--wechat-border);border-radius:4px;font-size:14px;transition:border-color 0.3s}.input-group input:focus,.input-group select:focus,.input-group textarea:focus{outline:none;border-color:var(--wechat-green)}.input-group textarea{resize:vertical;min-height:80px}.card{background:var(--wechat-white);border-radius:8px;padding:20px;box-shadow:0 2px 8px rgba(0,0,0,0.1);margin-bottom:20px}.card-header{font-size:16px;font-weight:600;margin-bottom:15px;padding-bottom:10px;border-bottom:1px solid var(--wechat-border)}.table{width:100%;border-collapse:collapse;background:var(--wechat-white)}.table th,.table td{padding:12px;text-align:left;border-bottom:1px solid var(--wechat-border)}.table th{background:#f5f5f5;font-weight:600;color:var(--wechat-text-primary)}.table tr:hover{background:#fafafa}.badge{display:inline-block;padding:4px 8px;border-radius:12px;font-size:12px;font-weight:500}.badge-success{background:#e7f9f0;color:var(--success-color)}.badge-danger{background:#fee;color:var(--error-color)}.badge-warning{background:#fff7e6;color:var(--warning-color)}.badge-info{background:#e6f7ff;color:var(--info-color)}.alert{padding:12px 16px;border-radius:4px;margin-bottom:15px}.alert-success{background:#e7f9f0;color:var(--success-color);border:1px solid var(--success-color)}.alert-error{background:#fee;color:var(--error-color);border:1px solid var(--error-color)}.alert-warning{background:#fff7e6;color:var(--warning-color);border:1px solid var(--warning-color)}.alert-info{background:#e6f7ff;color:var(--info-color);border:1px solid var(--info-color)}.loading{display:inline-block;width:20px;height:20px;border:3px solid var(--wechat-border);border-top-color:var(--wechat-green);border-radius:50%;animation:spin 0.8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.text-center{text-align:center}.text-right{text-align:right}.text-muted{color:var(--wechat-text-secondary)}.text-success{color:var(--success-color)}.text-danger{color:var(--error-color)}.text-warning{color:var(--warning-color)}.mt-10{margin-top:10px}.mt-20{margin-top:20px}.mb-10{margin-bottom:10px}.mb-20{margin-bottom:20px}.ml-10{margin-left:10px}.mr-10{margin-right:10px}.p-10{padding:10px}.p-20{padding:20px}.flex{display:flex}.flex-between{display:flex;justify-content:space-between;align-items:center}.flex-center{display:flex;justify-content:center;align-items:center}.flex-column{display:flex;flex-direction:column}.hidden{display:none}@media (max-width:768px){body{font-size:13px}.card{padding:15px}.table th,.table td{padding:8px;font-size:12px}}