html,
body {
  padding: 0;
  margin: 0;
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    Segoe UI,
    Roboto,
    Oxygen,
    Ubuntu,
    Cantarell,
    Fira Sans,
    Droid Sans,
    Helvetica Neue,
    sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

* {
  box-sizing: border-box;
}

.container {
  padding: 0 2rem;
}

.main {
  padding: 2rem 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.title {
  line-height: 1.15;
  font-size: 2rem;
}

.title,
.description {
  text-align: center;
}

/* 彩虹标题效果 */
.title {
  font-weight: 700;
  background: linear-gradient(
    90deg,
    #ff3cac,
    #784ba0,
    #2b86c5,
    #00d4ff,
    #00ff8c,
    #ffd700,
    #ff3cac
  );
  background-size: 400% 400%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent; /* for Safari */
  color: transparent;
  animation: rainbow 8s linear infinite;
}

@keyframes rainbow {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* respect users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  .title {
    animation: none;
    background-position: 50% 50% !important;
  }
}

.description {
  margin: 4rem 0;
  line-height: 1.5;
  font-size: 1.5rem;
}

.grid {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  max-width: 800px;
}

.card {
  width: 100%;
  margin: 1rem;
  padding: 1.5rem;
  text-align: left;
  color: inherit;
  text-decoration: none;
  border: 1px solid #eaeaea;
  border-radius: 10px;
  transition:
    color 0.15s ease,
    border-color 0.15s ease;
  max-width: 300px;
}

.card.pin {
  background-color: whitesmoke;
}

.card:hover,
.card:focus,
.card:active {
  color: #0070f3;
  border-color: #0070f3;
}

.card h2 {
  margin: 0;
  font-size: 1.5rem;
}

.card .title-icon {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

.card .title-icon img {
  width: 30px;
  height: 30px;
  margin-right: 10px;
}

.card p {
  margin: 0;
  font-size: 1.25rem;
  line-height: 1.5;
}

.card .single {
  text-overflow: ellipsis;
  overflow: hidden;
  word-break: break-all;
  white-space: nowrap;
}

.beian {
  margin-bottom: 20px;
  text-align: center;
}

.beian img {
  width: 14px;
  height: 14px;
  margin: 0 4px;
}

.beian a {
  text-decoration: none;
  font-size: 14px;
}

@media (max-width: 600px) {
  .grid {
    width: 100%;
    flex-direction: column;
  }
}

@media (prefers-color-scheme: dark) {
  html {
    color-scheme: dark;
  }

  body {
    color: white;
    background: black;
  }

  .card {
    border-color: #222;
  }

  .pin.card {
    background-color: #222;
  }
}