:root {
  --theme-color: #2c9fff;
  --text-default-color: rgb(15, 23, 42);
}

a {
  color: var(--theme-color);
  transition: color 0.2s;
  text-decoration: none;
}

body {
  --transparent: rgba(255, 255, 255, 0);
  --color: rgba(50, 158, 251, 0.1);
  background: linear-gradient(
    45deg,
    var(--transparent) 0%,
    var(--transparent) 10%,
    var(--color) 15%,
    var(--transparent) 20%,
    var(--transparent) 30%,
    var(--color) 40%,
    var(--transparent) 50%,
    var(--transparent) 70%,
    var(--color) 80%,
    var(--transparent) 90%,
    white
  );
  background-attachment: fixed;
}

.main {
  max-width: 1920px;
  margin: auto;
}

/**
 * ============ header ============
 */

.header {
  display: flex;
  position: absolute;
  width: 100%;
  justify-content: space-between;
  padding: 2em;
}

.header-logo {
}

.header-logo-img {
  width: 2em;
  vertical-align: middle;
  margin-right: 0.2em;
}

.header-logo-title {
  font-size: 1.5em;
  vertical-align: middle;
  color: var(--text-default-color);
}

.header-nav {
  display: flex;
  align-items: center;
}

.header-nav > a {
  text-decoration: none;
  transition: color 0.2s;
  color: var(--text-default-color);
}

.header-nav > a:hover {
  color: var(--theme-color);
}

/**
 * ============ page-banner ============
 */

.page-banner {
  min-height: 100vh;
  display: flex;
  justify-content: space-around;
  align-items: center;
}
.banner-carousel-box {
  max-width: 50em;
  border-radius: 1em;
  overflow: hidden;
  box-shadow: 10px 10px 10px 0 rgba(0, 0, 0, 0.2);
}

.banner-carousel-box img {
  width: 100%;
}

.banner-title-download {
  display: flex;
  justify-content: space-around;
}

.banner-title {
  margin-bottom: 3em;
  text-align: center;
}

.banner-title h1 {
  font-size: 3em;
  text-align: center;
}

.banner-title del {
  color: #ccc;
}

/* 下载按钮 */
.banner-title-download-button {
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  padding: 0.5em 0;
  width: 18em;
  margin-right: 1em;
  border-radius: 1em;
}

.banner-title-download-button:last-child {
  margin-right: 0;
}

.banner-title-download-button .icon {
  font-size: 3em;
  margin-right: 0.5em;
}

.banner-title-download-button .text span {
  font-size: 2em;
  display: block;
}

.banner-title-download-button .text span.description {
  font-size: 1em;
}

#download-windows {
  color: #2c9fff;
  border: 2px solid #2c9fff;
}

#download-windows.recommend {
  color: white;
  background-color: #2c9fff;
}

#download-macos {
  color: var(--text-default-color);
  border: 2px solid var(--text-default-color);
}

#download-macos.recommend {
  color: white;
  background-color: var(--text-default-color);
}

.banner-title-not-supported-tip {
  display: none;
  color: red;
  margin-top: 1em;
}

.banner-title-not-supported-tip.show {
  display: block;
}

/**
 * ============ page-other ============
 */

.page-other {
  min-height: 100vh;
  padding: 5em;
}

.page-other > section {
  margin-bottom: 15em;
}

.other-title {
  text-align: center;
  margin-bottom: 2em;
}

.features-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 0;
  margin: 0;
  gap: 2em 1em;
  list-style: none;
}

.features-list > li {
  display: flex;
  margin: 0;
  padding: 1em;
  background-color: white;
  border: 1px solid #fafafa;
  box-shadow: 5px 5px 20px rgba(0, 0, 0, 0.05);
  border-radius: 0.5em;
  font-size: 1.5em;
}

@keyframes rotate {
  from {
    transform: rotate(0);
  }

  to {
    transform: rotate(360deg);
  }
}

.features-list > li > span {
  display: inline-block;
  margin-left: 0.5em;
}

.features-list > li > span:first-child > i {
  display: inline-block;
  color: #bd4c3e;
  animation-name: rotate;
  animation-duration: 10s;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}

.resources-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1em;
  list-style: none;
  padding: 0;
  margin: 0;
}

.resources-list > li {
  margin: 0;
  background-color: white;
  box-shadow: 5px 5px 20px rgba(0, 0, 0, 0.05);
  border-radius: 1em;
  padding: 2em;
}

.resources-list > li > h2 {
  margin-bottom: 1em;
}

.resources-list img {
  width: 100%;
}

/**
 * ============ footer ============
 */

.footer {
  padding: 1em 2em;
  text-align: center;
}

@media screen and (max-width: 1700px) {
  .page-banner {
    flex-direction: column;
    padding-top: 20vh;
    margin-bottom: 10vh;
  }

  .banner-carousel-box {
    margin-top: 20vh;
  }
}

@media screen and (max-width: 1024px) {
  .banner-title-download {
    flex-direction: column;
    align-items: center;
  }

  .banner-title-download > a {
    margin: 0;
    margin-bottom: 1em;
  }

  .page-other .features-list {
    display: block;
  }

  .page-other .features-list > li {
    margin-bottom: 1em;
  }

  .page-other .resources-list {
    display: block;
  }

  .page-other .resources-list > li {
    margin-bottom: 2em;
  }

  .banner-title-not-supported-tip {
    text-align: center;
  }
}

@media screen and (max-width: 768px) {
  .banner-title h1 {
    padding: 0 1em;
    font-size: 2em;
  }

  .banner-title-download-button {
    font-size: 0.8em;
  }
  .banner-carousel-box {
    border-radius: 0.5em;
    width: 90vw;
  }

  .page-other {
    padding: 0 2em;
  }
}

@media screen and (max-width: 425px) {
  .header-logo-img {
    width: 1.5em;
  }
  .header-logo-title {
    font-size: 1em;
  }
  .page-other > section {
    margin-bottom: 7em;
  }
  .page-other .features-list > li {
    font-size: 1em !important;
  }

  .page-other .resources-list > li {
    padding: 1em;
    border-radius: 0.5em;
  }
}