CSS Shapes
CSS Triangles, Multiple Ways | CSS-Tricks - CSS-Tricks
CSS Multiple Box Shadow Generator | Filter Drop-shadow
javascript - Smart use of CSS to achieve colorful triangle border animation_个人文章 - SegmentFault 思否
CSS box-shadow Generator | Front-end Tools - High-performance and intuitive HTML / CSS generator
CSS Triangle Generator | Know How Does triangle generator works in CSS
html - CSS box shadow around a custom shape? - Stack Overflow
CSS3 Triangle w/ box-shadow
Getting Deep Into Shadows | CSS-Tricks - CSS-Tricks
geometry - How do CSS triangles work? - Stack Overflow
html - CSS Chevron like element WITH border and shadows after li element - Stack Overflow
5 Ways To Create A Triangle With CSS - Coding Dude
![Chapter 4. Visual Effects - CSS Secrets [Book]](https://www.oreilly.com/api/v2/epubs/9781449372736/files/graphics/f04-36.png "Chapter 4. Visual Effects - CSS Secrets [Book]")
Chapter 4. Visual Effects - CSS Secrets [Book]
How to create triangle shapes in HTML, SVG & CSS - Catalin Red
A nifty alternative to box-shadows — allround.io
CSS Art - How to Make Shadows and Angles
CSS Shadow Experiments | Playground from ZURB
Flat Long Box Shadow Using CSS & Vanilla Javascript | CSS Box Shadow Effects - YouTube
Box shadows in CSS
Drawing Triangles with CSS | UnusedCSS
html - CSS box shadow around a custom shape? - Stack Overflow
