如何为gatsby图像添加背景渐变？

import React from "react"
import { graphql, useStaticQuery } from "gatsby"
import Img from "gatsby-image"
import styled from "styled-components"

const Container = styled.div`
  position: relative;
  width: 300px;
  height: 300px;
`

const Background = styled.div`
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom right, #ff00cc, #333399);
  opacity: 0.8;
  z-index: 1;
`

const Image = styled(Img)`
  position: relative;
  z-index: 2;
`

const GatsbyImageWithGradient = () => {
  const data = useStaticQuery(graphql`
    query {
      placeholderImage: file(relativePath: { eq: "your-image.jpg" }) {
        childImageSharp {
          fluid(maxWidth: 300) {
            ...GatsbyImageSharpFluid
          }
        }
      }
    }
  `)

  return (
    <Container>
      <Background />
      <Image fluid={data.placeholderImage.childImageSharp.fluid} />
    </Container>
  )
}

export default GatsbyImageWithGradient