CSS3动画特效在活动页中的应用

[
    {
        state: 0,
        left: 9,
        top: -2,
        direction: { rotateZ: 290, color: "#d26754" }
    },
    {
        state: 0,
        left: 66,
        top: 10,
        direction: { rotateZ: 24, color: "#f58351" }
    },
    {
        state: 0,
        left: 18,
        top: 20,
        direction: { rotateZ: 30, color: "#f78351" }
    },
    {
        state: 0,
        left: -2,
        top: 36.5,
        direction: { rotateZ: 295, color: "#e19d47" }
    },
    {
        state: 0,
        left: 52,
        top: 49.5,
        direction: { rotateZ: 293, color: "#e19d47" }
    }
]

<div class="item" flex="main:center cross:center"
:style="{left:item.left+'%',top:item.top+'%'}"
v-for="item in items" @click="showReceive(item)">
    <div class="bottom" flex="main:center cross:center">
        <div class="direction" flex="dir:top" :style="{transform:`rotateX(34deg) rotateY(0deg) rotateZ(${item.direction.rotateZ}deg)`}">
            <div class="half"></div>
            <div class="half track">
                <div class="arrow"
                :style="{transform: `rotate(${item.direction.rotate}deg`,
                right:`${item.direction.right}px`,
                'border-color': `${item.direction.color} transparent transparent`
                }"></div>
            </div>
        </div>
    </div>
</div>
  .direction {
    position: absolute;
    width: 20px;
    height: 260%;
    .half {
      flex: 1;
    }
    .track {
      position: relative;
      // margin-top: 90px;
      margin-top: 2em;
      .arrow {
        position: absolute;
        width: 0;
        height: 0;
        border: 10px solid;
        border-color: red transparent transparent;
        animation: dynamicArrow 3000ms infinite linear;
      }
    }
  }
/* //动态箭头 */
@keyframes dynamicArrow {
  0% {
    opacity: 1;
    bottom: 100%;
  }
  70% {
    opacity: 1;
  }
  90% {
    opacity: 0.1;
    bottom: -20px;
  }
  100% {
    opacity: 0;
  }
}

<div class="snows">
  <div class="s_track" :style="{transform:`rotate(45deg) translate(${snow.deviation}px,${-snow.deviation}px)`,'z-index':snow.zindex}" v-for="snow in snows">
      <img class="snow" src="/static/original/img/DoubleDenierActivies/cbp_snow.png" :style="{opacity:snow.opacity,animation: `dynamicSnow ${snow.speed}ms ${snow.delay}ms infinite linear`,width:snow.size*1.14+'px',height:snow.size+'px'}"/>
  </div>
</div>
.s_track {
  position: absolute;
  width: 220%;
  // height: 10px;
  top: -10px;
  transform-origin: 0 0 0;
  .snow {
    visibility: hidden;
    position: absolute;
    z-index: 2;
    animation: dynamicSnow 2000ms infinite linear;
  }
}
/* //雪花 */
@keyframes dynamicSnow {
  0% {
    visibility: visible;
    top: 0;
    left: 0;
    transform: rotate(0);
  }
  100% {
    visibility: visible;
    top: 100%;
    left: 100%;
    transform: rotate(360deg);
  }
}
let snows = [],
  initCount = 16;
for (let i = 0; i < initCount; i++) {
  let unit = i - 8,
    speed = i > 3 ? i % 3 : i,
    size = 0;
  speed++;
  if (i % 5 == 0) {
    size = 10;
  } else if (i % 8 == 0) {
    size = 20;
  } else {
    size = Math.random() * 10;
  }
  snows.push({
    deviation: unit * 40, //位置
    delay: Math.random() * 1000, //延迟
    speed: speed * 3000, //速度
    opacity: speed / 4,
    size: size,
    zindex: size >= 10 ? 4 : 0
  });
}
let snows2 = [];
snows.forEach(f => {
  snows2.push({
    ...f,
    deviation: snows[parseInt(Math.random() * initCount)].deviation - 10,
    delay: f.delay + 1000 //延迟
  });
});
let snows3 = [];
snows.forEach(f => {
  snows3.push({
    ...f,
    deviation: snows[parseInt(Math.random() * initCount)].deviation - 20,
    delay: f.delay + 2000 //延迟
  });
});
snows = snows.concat(snows2);
snows = snows.concat(snows3);
snows.sort((a, b) => a.deviation - b.deviation);
this.snows = snows;