style.md

使用 stylelint 对样式属性的书写顺序做了约束：

1. Positioning
2. Box Model
3. Typography
4. Visual
5. Animation
6. Misc

.declaration-order {
  /* Positioning */
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 10;

  /* Box Model */
  display: block;
  float: right;
  width: 100px;
  height: 100px;
  margin: 10px;
  padding: 10px;

  /* Typography */
  color: #888;
  font: normal 16px Helvetica, sans-serif;
  line-height: 1.3;
  text-align: center;

  /* Visual */
  background-color: #eee;
  border: 1px solid #888;
  border-radius: 4px;
  opacity: 1;

  /* Animation */
  transition: all 1s;

  /* Misc */
  user-select: none;
}