ight = window.innerHeight;

        // 定义天体
        const sun = {
            x: canvas.width / 2,
            y: canvas.height / 2,
            radius: 30,
            colors: ['#f2831f', '#f15d22', '#d94125', '#a41d22'],
        };

        const planets = [
            {
                name: '水星',
                radius: 2,
                orbit: 50,
                speed: 0.1,
                colors: ['#5a5856', '#bfbdbc', '#8c8a89', '#f4f6f8'],
            },
            {
                