[教學] Illustrator 自定 SVG濾鏡特效，一點立即產生內陰影效果(含SVG濾鏡碼)

<filter  id="InnerShadow-5-5-0.75-black">
    <!–   Shadow Offset   –>
    <feOffset  dx="5" dy="5"></feOffset>
    <!–   Shadow Blur   –>
    <feGaussianBlur  result="offset-blur" stdDeviation="3"></feGaussianBlur>
    <!–   Invert the drop shadow to create an inner shadow   –>
    <feComposite  in="SourceGraphic" in2="offset-blur" operator="out" result="inverse"></feComposite>
    <!–   Color & Opacity   –>
    <feFlood  flood-color="black" flood-opacity="0.75" result="color"></feFlood>
    <!–   Clip color inside shadow   –>
    <feComposite  in="color" in2="inverse" operator="in" result="shadow"></feComposite>
    <!–   Put shadow over original object   –>
    <feComposite  in="shadow" in2="SourceGraphic" operator="over"></feComposite>
</filter>