CSS卡片边框动画

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html

css

@charset "UTF-8";
@property --hue {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}
@property --rotate {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}
@property --bg-y {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}
@property --bg-x {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}
@property --glow-translate-y {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}
@property --bg-size {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}
@property --glow-opacity {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}
@property --glow-blur {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}
@property --glow-scale {
  syntax: "<number>";
  inherits: true;
  initial-value: 2;
}
@property --glow-radius {
  syntax: "<number>";
  inherits: true;
  initial-value: 2;
}
@property --white-shadow {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}
:root {
  --debug: 0;
  --supported: 0;
  --not-supported: 0;
  --card-color: hsl(260deg 100% 3%);
  --text-color: hsl(260deg 10% 55%);
  --card-radius: 3.6vw;
  --card-width: 35vw;
  --border-width: 3px;
  --bg-size: 1;
  --hue: 0;
  --hue-speed: 1;
  --rotate: 0;
  --animation-speed: 4s;
  --interaction-speed: 0.55s;
  --glow-scale: 1.5;
  --scale-factor: 1;
  --glow-blur: 6;
  --glow-opacity: 1;
  --glow-radius: 100;
  --glow-rotate-unit: 1deg;
}

body::before,
body::after {
  content: "CSS.registerProperty is supported ?";
  position: absolute;
  display: block;
  top: 8px;
  left: 0;
  right: 0;
  margin: auto;
  width: calc(100% - 160px);
  max-width: 380px;
  height: auto;
  padding: 8px;
  border-radius: 8px;
  background: #48b93c;
  color: white;
  text-align: center;
  font-family: sans-serif;
  z-index: var(--supported, 0);
  opacity: var(--supported, 0);
}

body::after {
  content: "CSS.registerProperty is NOT supported ?";
  background: #b93c3c;
  z-index: var(--not-supported, 0);
  opacity: var(--not-supported, 0);
}

body::before,
body::after {
  display: none !important;
}

html,
body {
  height: 100%;
  width: 100%;
  padding: 0;
  margin: 0;
}

*,
*:before,
*:after {
  outline: calc(var(--debug) * 1px) red dashed;
}

body {
  background-color: var(--card-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Mona Sans", sans-serif;
}

body > div {
  width: var(--card-width);
  width: min(480px, var(--card-width));
  aspect-ratio: 1.5/1;
  color: white;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
  border-radius: var(--card-radius);
  cursor: pointer;
}
body > div:hover > div {
  mix-blend-mode: darken;
  --text-color: white;
  box-shadow: 0 0 calc(var(--white-shadow) * 1vw) calc(var(--white-shadow) * 0.15vw) rgba(255, 255, 255, 0.2);
  animation: shadow-pulse calc(var(--animation-speed) * 2) linear infinite;
}
body > div:hover > div:before {
  --bg-size: 15;
  animation-play-state: paused;
  transition: --bg-size var(--interaction-speed) ease;
}
body > div:hover .glow {
  --glow-blur: 1.5;
  --glow-opacity: 0.6;
  --glow-scale: 2.5;
  --glow-radius: 0;
  --rotate: 900;
  --glow-rotate-unit: 0;
  --scale-factor: 1.25;
  animation-play-state: paused;
}
body > div:hover .glow:after {
  --glow-translate-y: 0;
  animation-play-state: paused;
  transition: --glow-translate-y 0s ease, --glow-blur 0.05s ease, --glow-opacity 0.05s ease, --glow-scale 0.05s ease, --glow-radius 0.05s ease;
}
body > div:before, body > div:after {
  content: "";
  display: block;
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: var(--card-radius);
}
body > div > div {
  position: absolute;
  width: 100%;
  height: 100%;
  background: var(--card-color);
  border-radius: calc(calc(var(--card-radius) * 0.9));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  text-transform: uppercase;
  font-stretch: 150%;
  font-size: 18px;
  font-size: clamp(1.5vw, 1.5vmin, 32px);
  color: var(--text-color);
  padding: calc(var(--card-width) / 8);
}
body > div > div span {
  display: inline-block;
  padding: 0.25em;
  border-radius: 4px;
  background: var(--text-color);
  color: black;
  margin-right: 8px;
  font-weight: 900;
}
body > div > div:before {
  content: "";
  display: block;
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: calc(calc(var(--card-radius) * 0.9));
  box-shadow: 0 0 20px black;
  mix-blend-mode: color-burn;
  z-index: -1;
  background: #292929 radial-gradient(30% 30% at calc(var(--bg-x) * 1%) calc(var(--bg-y) * 1%), hsl(calc(calc(var(--hue) * var(--hue-speed)) * 1deg), 100%, 90%) calc(0% * var(--bg-size)), hsl(calc(calc(var(--hue) * var(--hue-speed)) * 1deg), 100%, 80%) calc(20% * var(--bg-size)), hsl(calc(calc(var(--hue) * var(--hue-speed)) * 1deg), 100%, 60%) calc(40% * var(--bg-size)), transparent 100%);
  width: calc(100% + var(--border-width));
  height: calc(100% + var(--border-width));
  animation: hue-animation var(--animation-speed) linear infinite, rotate-bg var(--animation-speed) linear infinite;
  transition: --bg-size var(--interaction-speed) ease;
}
body > div .glow {
  --glow-translate-y: 0;
  display: block;
  position: absolute;
  width: calc(var(--card-width) / 5);
  height: calc(var(--card-width) / 5);
  animation: rotate var(--animation-speed) linear infinite;
  transform: rotateZ(calc(var(--rotate) * var(--glow-rotate-unit)));
  transform-origin: center;
  border-radius: calc(var(--glow-radius) * 10vw);
}
body > div .glow:after {
  content: "";
  display: block;
  z-index: -2;
  filter: blur(calc(var(--glow-blur) * 10px));
  width: 130%;
  height: 130%;
  left: -15%;
  top: -15%;
  background: hsl(calc(calc(var(--hue) * var(--hue-speed)) * 1deg), 100%, 60%);
  position: relative;
  border-radius: calc(var(--glow-radius) * 10vw);
  animation: hue-animation var(--animation-speed) linear infinite;
  transform: scaleY(calc(var(--glow-scale) * var(--scale-factor) / 1.1)) scaleX(calc(var(--glow-scale) * var(--scale-factor) * 1.2)) translateY(calc(var(--glow-translate-y) * 1%));
  opacity: var(--glow-opacity);
}

@keyframes shadow-pulse {
  0%, 24%, 46%, 73%, 96% {
    --white-shadow: 0.5;
  }
  12%, 28%, 41%, 63%, 75%, 82%, 98% {
    --white-shadow: 2.5;
  }
  6%, 32%, 57% {
    --white-shadow: 1.3;
  }
  18%, 52%, 88% {
    --white-shadow: 3.5;
  }
}
@keyframes rotate-bg {
  0% {
    --bg-x: 0;
    --bg-y: 0;
  }
  25% {
    --bg-x: 100;
    --bg-y: 0;
  }
  50% {
    --bg-x: 100;
    --bg-y: 100;
  }
  75% {
    --bg-x: 0;
    --bg-y: 100;
  }
  100% {
    --bg-x: 0;
    --bg-y: 0;
  }
}
@keyframes rotate {
  from {
    --rotate: -70;
    --glow-translate-y: -65;
  }
  25% {
    --glow-translate-y: -65;
  }
  50% {
    --glow-translate-y: -65;
  }
  60%, 75% {
    --glow-translate-y: -65;
  }
  85% {
    --glow-translate-y: -65;
  }
  to {
    --rotate: calc(360 - 70);
    --glow-translate-y: -65;
  }
}
@keyframes hue-animation {
  0% {
    --hue: 0;
  }
  100% {
    --hue: 360;
  }
}

JavaScript

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