code: function createStyleDictionary(styles) {
      let total = {}
      for (let k in styles) {
          const val = styles[k]
          //sort clz name to judge arbitrary order in multi-className
          k = sortSeq(k)
          //merge style chain from last condition
          const lastEle = getLastEle(k)
          //no sharing data. create new chain
          if (!total.hasOwnProperty(lastEle)) {
              total[lastEle] = createItem(k, val)[lastEle]
          } else {
              //merge chain data
              merge(createItem(k, styles[k]), total)
          }
      }
      return total
  }
docs: create special style dict structure for high performance query
  @param styles style object