let radius = Math.min(this.context.width, this.context.height) / 2 - 20;
          let centerX = this.context.width / 2;
          let centerY = this.context.height / 2;

          // 绘制圆环
          this.context.strokeStyle = '#E4E4E4';
          const numRings = 5;
          const ringInterval = 1;
          for (let i = 0; i < numRings; i++) {
            this.context.beginPath();
            this.context.arc(centerX, centerY, (i + 1) * (radius / numRings), 0, 2 * Math.PI);
            this.context.stroke();
          }

          // 绘制雷达图背景网格
          // this.context.lineWidth = 1;
          for (let i = 0; i < this.numDataPoints; i++) {
            const angle = i * this.angleStep - this.startAngle;
            const x = centerX + ra