<div class="canvas">
  <div class="ninth">
    <div class="cornersWrapper">
      <div class="corner is-large"></div>
      <div class="corner is-medium"></div>
      <div class="corner is-small"></div>
    </div>
  </div>

  <div class="ninth">
    <div class="cornersWrapper">
      <div class="corner is-large"></div>
      <div class="corner is-medium"></div>
      <div class="corner is-small"></div>
    </div>
  </div>

  <div class="ninth">
    <div class="cornersWrapper">
      <div class="corner is-large"></div>
      <div class="corner is-medium"></div>
      <div class="corner is-small"></div>
    </div>
  </div>

  <div class="ninth">
    <div class="cornersWrapper">
      <div class="corner is-large"></div>
      <div class="corner is-medium"></div>
      <div class="corner is-small"></div>
    </div>
  </div>

  <div class="ninth"></div>

  <div class="ninth">
    <div class="cornersWrapper">
      <div class="corner is-large"></div>
      <div class="corner is-medium"></div>
      <div class="corner is-small"></div>
    </div>
  </div>

  <div class="ninth">
    <div class="cornersWrapper">
      <div class="corner is-large"></div>
      <div class="corner is-medium"></div>
      <div class="corner is-small"></div>
    </div>
  </div>

  <div class="ninth">
    <div class="cornersWrapper">
      <div class="corner is-large"></div>
      <div class="corner is-medium"></div>
      <div class="corner is-small"></div>
    </div>
  </div>

  <div class="ninth">
    <div class="cornersWrapper">
      <div class="corner is-large"></div>
      <div class="corner is-medium"></div>
      <div class="corner is-small"></div>
    </div>
  </div>

  <div class="circle is-first"></div>
  <div class="circle is-second"></div>
  <div class="circle is-third"></div>
  <div class="circle is-fourth"></div>
  <div class="circle is-fifth"></div>
  <div class="circle is-sixth"></div>
  <div class="circle is-seventh"></div>
  <div class="circle is-eighth"></div>

  <div class="meetingPoint"></div>
</div>

{/tabs-pane}
{tabs-pane label="css代码"}

:root {
  --background-color: #1b1b2c;
  --main-color: #0ff;
  --meeting-point-color: #7fffff;

  --canvas-size: 68vmin;
  --canvas-max-size: 500px;

  --circle-size: 8vmin;

  --corner-size-large: 20vmin;
  --corner-size-medium: 16vmin;
  --corner-size-small: 12vmin;

  --corner-side-size-width: 1.5vmin;
  --corner-side-size-height: 1.5vmin;

  --animation-duration: 3000ms;
}

body {
  margin: 0;
  display: grid;
  place-items: center;
  min-height: 100vh;
  background-color: var(--background-color);
}

.canvas {
  width: var(--canvas-size);
  height: var(--canvas-size);
  max-width: var(--canvas-max-size);
  max-height: var(--canvas-max-size);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  position: relative;
}

.ninth {
  position: relative;
  overflow: hidden;
}

.cornersWrapper {
  position: absolute;
  z-index: 1;
  mix-blend-mode: plus-lighter;
}

.ninth:nth-child(1) .cornersWrapper {
  bottom: 0;
  right: 0;
}
.ninth:nth-child(2) .cornersWrapper {
  bottom: 0;
  left: 50%;
  transform: rotate(45deg);
}
.ninth:nth-child(3) .cornersWrapper {
  bottom: 0;
  transform: rotate(90deg);
}
.ninth:nth-child(4) .cornersWrapper {
  top: 50%;
  right: 0;
  transform: rotate(315deg);
}
.ninth:nth-child(6) .cornersWrapper {
  top: 50%;
  transform: rotate(135deg);
}
.ninth:nth-child(7) .cornersWrapper {
  right: 0;
  transform: rotate(270deg);
}
.ninth:nth-child(8) .cornersWrapper {
  left: 50%;
  transform: rotate(225deg);
}
.ninth:nth-child(9) .cornersWrapper {
  transform: rotate(180deg);
}

.corner {
  position: absolute;
}
.corner.is-large {
  width: var(--corner-size-large);
  height: var(--corner-size-large);
  bottom: 0;
  right: 0;
}
.corner.is-medium {
  width: var(--corner-size-medium);
  height: var(--corner-size-medium);
  opacity: 0.35;
  bottom: 4vmin;
  right: 4vmin;
}
.corner.is-small {
  width: var(--corner-size-small);
  height: var(--corner-size-small);
  bottom: 8vmin;
  right: 8vmin;
}
.corner::before,
.corner::after {
  content: "";
  position: absolute;
}
.corner::before {
  width: var(--corner-side-size-width);
  height: 100%;
  right: 0;
  background: linear-gradient(transparent, var(--main-color) 50%);
}
.corner::after {
  width: 100%;
  height: var(--corner-side-size-height);
  bottom: 0;
  background: linear-gradient(90deg, transparent, var(--main-color) 50%);
}

.circle {
  position: absolute;
  width: var(--circle-size);
  height: var(--circle-size);
  background-color: var(--main-color);
  border-radius: 50%;
  box-shadow: 0 0 20px var(--main-color);
}

@keyframes move-circle-first {
  0%,
  100% {
    top: 0;
    left: 0;
    transform: scale(0) translate(0%, 0%);
  }
  20% {
    top: 0;
    left: 0;
    transform: scale(1) translate(0%, 0%);
    opacity: 1;
  }
  85% {
    top: 50%;
    left: 50%;
    transform: scale(1) translate(-50%, -50%);
    opacity: 0.75;
  }
  95% {
    top: calc(50% - var(--circle-size) / 2);
    left: calc(50% - var(--circle-size) / 2);
    transform: scale(0) translate(-50%, -50%);
    opacity: 0;
  }
}
.circle.is-first {
  top: 0;
  left: 0;
  transform: scale(0) translate(0%, 0%);
  animation: move-circle-first var(--animation-duration) ease-in-out infinite;
}

@keyframes move-circle-second {
  0%,
  100% {
    top: calc(-1 * var(--circle-size) / 2);
    left: calc(50% - var(--circle-size) / 2);
    transform: scale(0) translate(-50%, -80%);
  }
  20% {
    top: 0;
    left: 50%;
    transform: scale(1) translate(-50%, -80%);
    opacity: 1;
  }
  85% {
    top: 50%;
    left: 50%;
    transform: scale(1) translate(-50%, -50%);
    opacity: 0.75;
  }
  95% {
    top: calc(50% - var(--circle-size) / 2);
    left: calc(50% - var(--circle-size) / 2);
    transform: scale(0) translate(-50%, -50%);
    opacity: 0;
  }
}
.circle.is-second {
  top: 0;
  left: 50%;
  transform: scale(0) translate(-50%, -80%);
  animation: move-circle-second var(--animation-duration) ease-in-out infinite;
  animation-delay: calc(var(--animation-duration) * 0.4);
}

@keyframes move-circle-third {
  0%,
  100% {
    top: 0;
    right: 0;
    transform: scale(0) translate(0%, 0%);
  }
  20% {
    top: 0;
    right: 0;
    transform: scale(1) translate(0%, 0%);
    opacity: 1;
  }
  85% {
    top: 50%;
    right: 50%;
    transform: scale(1) translate(50%, -50%);
    opacity: 0.75;
  }
  95% {
    top: calc(50% - var(--circle-size) / 2);
    right: calc(50% - var(--circle-size) / 2);
    transform: scale(0) translate(50%, -50%);
    opacity: 0;
  }
}
.circle.is-third {
  top: 0;
  right: 0;
  transform: scale(0) translate(0%, 0%);
  animation: move-circle-third var(--animation-duration) ease-in-out infinite;
}

@keyframes move-circle-fourth {
  0%,
  100% {
    top: calc(50% - var(--circle-size) / 2);
    left: calc(-1 * var(--circle-size) / 2);
    transform: scale(0) translate(-80%, -50%);
  }
  20% {
    top: 50%;
    left: 0;
    transform: scale(1) translate(-80%, -50%);
    opacity: 1;
  }
  85% {
    top: 50%;
    left: 50%;
    transform: scale(1) translate(-50%, -50%);
    opacity: 0.75;
  }
  95% {
    top: calc(50% - var(--circle-size) / 2);
    left: calc(50% - var(--circle-size) / 2);
    transform: scale(0) translate(-50%, -50%);
    opacity: 0;
  }
}
.circle.is-fourth {
  top: 50%;
  left: 0;
  transform: scale(0) translate(-80%, -50%);
  animation: move-circle-fourth var(--animation-duration) ease-in-out infinite;
  animation-delay: calc(var(--animation-duration) * 0.4);
}

@keyframes move-circle-fifth {
  0%,
  100% {
    top: calc(50% - var(--circle-size) / 2);
    right: calc(-1 * var(--circle-size) / 2);
    transform: scale(0) translate(80%, -50%);
  }
  20% {
    top: 50%;
    right: 0;
    transform: scale(1) translate(80%, -50%);
    opacity: 1;
  }
  85% {
    top: 50%;
    right: 50%;
    transform: scale(1) translate(50%, -50%);
    opacity: 0.75;
  }
  95% {
    top: calc(50% - var(--circle-size) / 2);
    right: calc(50% - var(--circle-size) / 2);
    transform: scale(0) translate(50%, -50%);
    opacity: 0;
  }
}
.circle.is-fifth {
  top: 50%;
  right: 0;
  transform: scale(0) translate(80%, -50%);
  animation: move-circle-fifth var(--animation-duration) ease-in-out infinite;
  animation-delay: calc(var(--animation-duration) * 0.4);
}

@keyframes move-circle-sixth {
  0%,
  100% {
    bottom: 0;
    left: 0;
    transform: scale(0) translate(0%, 0%);
  }
  20% {
    bottom: 0;
    left: 0;
    transform: scale(1) translate(0%, 0%);
    opacity: 1;
  }
  85% {
    bottom: 50%;
    left: 50%;
    transform: scale(1) translate(-50%, 50%);
    opacity: 0.75;
  }
  95% {
    bottom: calc(50% - var(--circle-size) / 2);
    left: calc(50% - var(--circle-size) / 2);
    transform: scale(0) translate(-50%, 50%);
    opacity: 0;
  }
}
.circle.is-sixth {
  bottom: 0;
  left: 0;
  transform: scale(0) translate(0%, 0%);
  animation: move-circle-sixth var(--animation-duration) ease-in-out infinite;
}

@keyframes move-circle-seventh {
  0%,
  100% {
    bottom: calc(-1 * var(--circle-size) / 2);
    left: calc(50% - var(--circle-size) / 2);
    transform: scale(0) translate(-50%, 80%);
  }
  20% {
    bottom: 0;
    left: 50%;
    transform: scale(1) translate(-50%, 80%);
    opacity: 1;
  }
  85% {
    bottom: 50%;
    left: 50%;
    transform: scale(1) translate(-50%, 50%);
    opacity: 0.75;
  }
  95% {
    bottom: calc(50% - var(--circle-size) / 2);
    left: calc(50% - var(--circle-size) / 2);
    transform: scale(0) translate(-50%, 50%);
    opacity: 0;
  }
}
.circle.is-seventh {
  bottom: 0;
  left: 50%;
  transform: scale(0) translate(-50%, 80%);
  animation: move-circle-seventh var(--animation-duration) ease-in-out infinite;
  animation-delay: calc(var(--animation-duration) * 0.4);
}

@keyframes move-circle-eighth {
  0%,
  100% {
    bottom: 0;
    right: 0;
    transform: scale(0) translate(0%, 0%);
  }
  20% {
    bottom: 0;
    right: 0;
    transform: scale(1) translate(0%, 0%);
    opacity: 1;
  }
  85% {
    bottom: 50%;
    right: 50%;
    transform: scale(1) translate(50%, 50%);
    opacity: 0.75;
  }
  95% {
    bottom: calc(50% - var(--circle-size) / 2);
    right: calc(50% - var(--circle-size) / 2);
    transform: scale(0) translate(50%, 50%);
    opacity: 0;
  }
}
.circle.is-eighth {
  bottom: 0;
  right: 0;
  transform: scale(0) translate(0%, 0%);
  animation: move-circle-eighth var(--animation-duration) ease-in-out infinite;
}

.meetingPoint {
  width: 12vmin;
  height: 12vmin;
  border-radius: 50%;
  border: solid 1.5vmin var(--meeting-point-color);
  filter: drop-shadow(0 0 30px var(--main-color));
  mix-blend-mode: plus-lighter;
  position: absolute;
  inset: 50%;
  transform: translate(-50%, -50%);
}

{/tabs-pane}