废话不多说，直接开整

1.修改themes\butterfly\layout\includes\post\reward.pug,整体替换为以下内容：

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link(rel='stylesheet' href=url_for(theme.CDN.coin_css) media="defer" onload="this.media='all'")
.post-reward
  button.tip-button.reward-button
    span.tip-button__text= _p('donate')
    .coin-wrapper
      .coin
        .coin__middle
        .coin__back
        .coin__front
    .reward-main
      ul.reward-all
        each item in theme.reward.QR_code
          - var clickTo = (item.itemlist||item).link ? (item.itemlist||item).link : (item.itemlist||item).img
          li.reward-item
            a(href=clickTo target='_blank')
              img.post-qr-code-img(src=url_for((item.itemlist||item).img) alt=(item.itemlist||item).text)
            .post-qr-code-desc=(item.itemlist||item).text
if theme.reward.coinAudio
  - var coinAudio = theme.reward.coinAudio ? url_for(theme.reward.coinAudio) : 'https://npm.elemecdn.com/akilar-candyassets@1.0.16/audio/coin.mp3'
  audio#coinAudio(src=coinAudio)
script(defer src=url_for(theme.CDN.coin_js))

2.新建themes\butterfly\source\css\coin.css

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.tip-button {
  border: 0;
  border-radius: 0.25rem;
  cursor: pointer;
  font-size: 20px;
  font-weight: 600;
  height: 2.6rem;
  margin-bottom: -4rem;
  outline: 0;
  position: relative;
  top: 0;
  transform-origin: 0% 100%;
  transition: transform 50ms ease-in-out;
  width: auto;
  -webkit-tap-highlight-color: transparent;
}
.tip-button:active {
  transform: rotate(4deg);
}
.tip-button.clicked {
  animation: 150ms ease-in-out 1 shake;
  pointer-events: none;
}
.tip-button.clicked .tip-button__text {
  opacity: 0;
  transition: opacity 100ms linear 200ms;
}
.tip-button.clicked::before {
  height: 0.5rem;
  width: 60%;
  background: $button-hover-color;
}
.tip-button.clicked .coin {
  transition: margin-bottom 1s linear 200ms;
  margin-bottom: 0;
}
.tip-button.shrink-landing::before {
  transition: width 200ms ease-in;
  width: 0;
}
.tip-button.coin-landed::after {
  opacity: 1;
  transform: scale(1);
  transform-origin: 50% 100%;
}
.tip-button.coin-landed .coin-wrapper {
  background: radial-gradient(circle at 35% 97%, rgba(3, 16, 50, 0.4) 0.04rem, transparent 0.04rem), radial-gradient(circle at 45% 92%, rgba(3, 16, 50, 0.4) 0.04rem, transparent 0.02rem), radial-gradient(circle at 55% 98%, rgba(3, 16, 50, 0.4) 0.04rem, transparent 0.04rem), radial-gradient(circle at 65% 96%, rgba(3, 16, 50, 0.4) 0.06rem, transparent 0.06rem);
  background-position: center bottom;
  background-size: 100%;
  bottom: -1rem;
  opacity: 0;
  transform: scale(2) translateY(-10px);
}
.tip-button__text {
  color: #fff;
  margin-right: 1.8rem;
  opacity: 1;
  position: relative;
  transition: opacity 100ms linear 500ms;
  z-index: 3;
}
.tip-button::before {
  border-radius: 0.25rem;
  bottom: 0;
  content: '';
  display: block;
  height: 100%;
  left: 50%;
  position: absolute;
  transform: translateX(-50%);
  transition: height 250ms ease-in-out 400ms, width 250ms ease-in-out 300ms;
  width: 100%;
  z-index: 2;
}
.tip-button::after {
  bottom: -1rem;
  color: white;
  content: 'ヾ(≧O≦)〃嗷~'; /*点击后显示的内容*/
  height: 110%;
  left: 0;
  opacity: 0;
  position: absolute;
  pointer-events: none;
  text-align: center;
  transform: scale(0);
  transform-origin: 50% 20%;
  transition: transform 200ms cubic-bezier(0, 0, 0.35, 1.43);
  width: 100%;
  z-index: 1;
}

.coin-wrapper {
  background: none;
  bottom: 0;
  height: 18rem;
  left: 0;
  opacity: 1;
  overflow: hidden;
  pointer-events: none;
  position: absolute;
  transform: none;
  transform-origin: 50% 100%;
  transition: opacity 200ms linear 100ms, transform 300ms ease-out;
  width: 100%;
}

.coin {
  --front-y-multiplier: 0;
  --back-y-multiplier: 0;
  --coin-y-multiplier: 0;
  --coin-x-multiplier: 0;
  --coin-scale-multiplier: 0;
  --coin-rotation-multiplier: 0;
  --shine-opacity-multiplier: 0.4;
  --shine-bg-multiplier: 50%;
  bottom: calc(var(--coin-y-multiplier) * 1rem - 3.5rem);
  height: 3.5rem;
  margin-bottom: 3.05rem;
  position: absolute;
  right: calc(var(--coin-x-multiplier) * 34% + 16%);
  transform: translateX(50%) scale(calc(0.4 + var(--coin-scale-multiplier))) rotate(calc(var(--coin-rotation-multiplier) * -1deg));
  transition: opacity 100ms linear 200ms;
  width: 3.5rem;
  z-index: 3;
}
.coin__front, .coin__middle, .coin__back, .coin::before, .coin__front::after, .coin__back::after {
  border-radius: 50%;
  box-sizing: border-box;
  height: 100%;
  left: 0;
  position: absolute;
  width: 100%;
  z-index: 3;
}
.coin__front {
  background: radial-gradient(circle at 50% 50%, transparent 50%, rgba(115, 124, 153, 0.4) 54%, #c2cadf 54%), linear-gradient(210deg, #8590b3 32%, transparent 32%), linear-gradient(150deg, #8590b3 32%, transparent 32%), linear-gradient(to right, #8590b3 22%, transparent 22%, transparent 78%, #8590b3 78%), linear-gradient(to bottom, #fcfaf9 44%, transparent 44%, transparent 65%, #fcfaf9 65%, #fcfaf9 71%, #8590b3 71%), linear-gradient(to right, transparent 28%, #fcfaf9 28%, #fcfaf9 34%, #8590b3 34%, #8590b3 40%, #fcfaf9 40%, #fcfaf9 47%, #8590b3 47%, #8590b3 53%, #fcfaf9 53%, #fcfaf9 60%, #8590b3 60%, #8590b3 66%, #fcfaf9 66%, #fcfaf9 72%, transparent 72%);
  background-color: #8590b3;
  background-size: 100% 100%;
  transform: translateY(calc(var(--front-y-multiplier) * 0.3181818182rem / 2)) scaleY(var(--front-scale-multiplier));
}
.coin__front::after {
  background: rgba(0, 0, 0, 0.2);
  content: '';
  opacity: var(--front-y-multiplier);
}
.coin__middle {
  background: #737c99;
  transform: translateY(calc(var(--middle-y-multiplier) * 0.3181818182rem / 2)) scaleY(var(--middle-scale-multiplier));
}
.coin__back {
  background: radial-gradient(circle at 50% 50%, transparent 50%, rgba(115, 124, 153, 0.4) 54%, #c2cadf 54%), radial-gradient(circle at 50% 40%, #fcfaf9 23%, transparent 23%), radial-gradient(circle at 50% 100%, #fcfaf9 35%, transparent 35%);
  background-color: #8590b3;
  background-size: 100% 100%;
  transform: translateY(calc(var(--back-y-multiplier) * 0.3181818182rem / 2)) scaleY(var(--back-scale-multiplier));
}
.coin__back::after {
  background: rgba(0, 0, 0, 0.2);
  content: '';
  opacity: var(--back-y-multiplier);
}
.coin::before {
  background: radial-gradient(circle at 25% 65%, transparent 50%, rgba(255, 255, 255, 0.9) 90%), linear-gradient(55deg, transparent calc(var(--shine-bg-multiplier) + 0%), #e9f4ff calc(var(--shine-bg-multiplier) + 0%), transparent calc(var(--shine-bg-multiplier) + 50%));
  content: '';
  opacity: var(--shine-opacity-multiplier);
  transform: translateY(calc(var(--middle-y-multiplier) * 0.3181818182rem / -2)) scaleY(var(--middle-scale-multiplier)) rotate(calc(var(--coin-rotation-multiplier) * 1deg));
  z-index: 10;
}
.coin::after {
  background: #737c99;
  content: '';
  height: 0.3181818182rem;
  left: 0;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 100%;
  z-index: 2;
}

@keyframes shake {
  0% {
    transform: rotate(4deg);
  }
  66% {
    transform: rotate(-4deg);
  }
  100% {
    transform: rotate();
  }
}

3.新建themes\butterfly\source\js\coin.js

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var tipButtons = document.querySelectorAll('.tip-button')

function coinAudio() {
  var coinAudio = document.getElementById("coinAudio");
  if (coinAudio) {
    coinAudio.play();//有音频时播放
  }
}
// Loop through all buttons (allows for multiple buttons on page)
tipButtons.forEach((button) => {
  var coin = button.querySelector('.coin')

  // The larger the number, the slower the animation
  coin.maxMoveLoopCount = 90

  button.addEventListener('click', () => {
    if (/Android|webOS|BlackBerry/i.test(navigator.userAgent)) return true; //媒体选择
    if (button.clicked) return
    button.classList.add('clicked')

    // Wait to start flipping th coin because of the button tilt animation
    setTimeout(() => {
      // Randomize the flipping speeds just for fun
      coin.sideRotationCount = Math.floor(Math.random() * 5) * 90
      coin.maxFlipAngle = (Math.floor(Math.random() * 4) + 3) * Math.PI
      button.clicked = true
      flipCoin()
      coinAudio()
    }, 50)
  })

  var flipCoin = () => {
    coin.moveLoopCount = 0
    flipCoinLoop()
  }

  var resetCoin = () => {
    coin.style.setProperty('--coin-x-multiplier', 0)
    coin.style.setProperty('--coin-scale-multiplier', 0)
    coin.style.setProperty('--coin-rotation-multiplier', 0)
    coin.style.setProperty('--shine-opacity-multiplier', 0.4)
    coin.style.setProperty('--shine-bg-multiplier', '50%')
    coin.style.setProperty('opacity', 1)
    // Delay to give the reset animation some time before you can click again
    setTimeout(() => {
      button.clicked = false
    }, 300)
  }

  var flipCoinLoop = () => {
    coin.moveLoopCount++
    var percentageCompleted = coin.moveLoopCount / coin.maxMoveLoopCount
    coin.angle = -coin.maxFlipAngle * Math.pow((percentageCompleted - 1), 2) + coin.maxFlipAngle

    // Calculate the scale and position of the coin moving through the air
    coin.style.setProperty('--coin-y-multiplier', -11 * Math.pow(percentageCompleted * 2 - 1, 4) + 11)
    coin.style.setProperty('--coin-x-multiplier', percentageCompleted)
    coin.style.setProperty('--coin-scale-multiplier', percentageCompleted * 0.6)
    coin.style.setProperty('--coin-rotation-multiplier', percentageCompleted * coin.sideRotationCount)

    // Calculate the scale and position values for the different coin faces
    // The math uses sin/cos wave functions to similate the circular motion of 3D spin
    coin.style.setProperty('--front-scale-multiplier', Math.max(Math.cos(coin.angle), 0))
    coin.style.setProperty('--front-y-multiplier', Math.sin(coin.angle))

    coin.style.setProperty('--middle-scale-multiplier', Math.abs(Math.cos(coin.angle), 0))
    coin.style.setProperty('--middle-y-multiplier', Math.cos((coin.angle + Math.PI / 2) % Math.PI))

    coin.style.setProperty('--back-scale-multiplier', Math.max(Math.cos(coin.angle - Math.PI), 0))
    coin.style.setProperty('--back-y-multiplier', Math.sin(coin.angle - Math.PI))

    coin.style.setProperty('--shine-opacity-multiplier', 4 * Math.sin((coin.angle + Math.PI / 2) % Math.PI) - 3.2)
    coin.style.setProperty('--shine-bg-multiplier', -40 * (Math.cos((coin.angle + Math.PI / 2) % Math.PI) - 0.5) + '%')

    // Repeat animation loop
    if (coin.moveLoopCount < coin.maxMoveLoopCount) {
      if (coin.moveLoopCount === coin.maxMoveLoopCount - 6) button.classList.add('shrink-landing')
      window.requestAnimationFrame(flipCoinLoop)
    } else {
      button.classList.add('coin-landed')
      coin.style.setProperty('opacity', 0)
      setTimeout(() => {
        button.classList.remove('clicked', 'shrink-landing', 'coin-landed')
        setTimeout(() => {
          resetCoin()
        }, 300)
      }, 1500)
    }
  }
})

4.修改_config.butterfly.yml,添加音频文件配置项，添加CDN配置项：

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  # Sponsor/reward
  reward:
    enable: true
+   coinAudio: https://npm.elemecdn.com/akilar-candyassets@1.0.16/audio/coin.mp3
    QR_code:
    。
    。
    。
  CDN:
    # main
    main_css: /css/index.css
    jquery: https://npm.elemecdn.com/jquery@latest/dist/jquery.min.js
    main: /js/main.js
    utils:/js/utils.js
+    # 打赏按钮投币效果
+   coin_js: /js/coin.js
+   coin_css: /css/coin.css

5.现在的打赏按钮样式需要稍作适配，当前若提示语太长，悬停时会无法显示完全。需要微调一下,修改themes\butterfly\source\css_layout\reward.styl，整体替换为以下内容：

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.post-reward
  position: relative
  margin-top: 4rem
  width: 100%
  text-align: center

  .reward-button
    display: inline-block
    padding: .2rem 1.2rem
    background: var(--btn-bg)
    color: var(--btn-color)
    cursor: pointer
    transition: all .4s

    &:hover
      box-shadow: inset 15em 0 0 0 var(--btn-hover-color)

      .reward-main
        display: block

    .reward-main
      position: absolute
      bottom: 40px
      left: -25%
      z-index: 100
      display: none
      padding: 0 0 15px
      width: 150%

      .reward-all
        display: inline-block
        margin: 0
        padding: 1rem .5rem
        border-radius: 4px
        background: var(--reward-pop)

        &:before
          position: absolute
          bottom: -10px
          left: 0
          width: 100%
          height: 20px
          content: ''

        &:after
          position: absolute
          right: 0
          bottom: 2px
          left: 0
          margin: 0 auto
          width: 0
          height: 0
          border-top: 13px solid var(--reward-pop)
          border-right: 13px solid transparent
          border-left: 13px solid transparent
          content: ''

        .reward-item
          display: inline-block
          padding: 0 8px
          list-style-type: none
          vertical-align: top

          img
            width: 130px
            height: 130px

          .post-qr-code-desc
            padding-top: .4rem
            width: 130px
            color: $reward-pop-up-color

还可以针对自己的情况适度调整以下内容：
修改悬停打赏按钮时的颜色填充长度：

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  .reward-button
    display: inline-block
    padding: .2rem 1.2rem
    background: var(--btn-bg)
    color: var(--btn-color)
    cursor: pointer
    transition: all .4s

    &:hover
-     box-shadow: inset 9em 0 0 0 var(--btn-hover-color)
+     box-shadow: inset 20em 0 0 0 var(--btn-hover-color)

修改打赏二维码的样式（仅针对2张二维码的情况，单张不用改动。两张以上需要自己调试这两个参数）

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  .reward-main
    position: absolute
    bottom: 40px
-   left: 0
+   left: -25%
    z-index: 100
    display: none
    padding: 0 0 15px
-   width: 100%
+   width: 150%

完毕！