/* Winter-sky loading screen */
body.fe-page-loading {
  overflow: hidden;
}

.fe-loader,
.fe-loader * {
  box-sizing: border-box;
}

.fe-loader {
  --fe-loader-progress: 0%;
  position: fixed;
  z-index: 9999;
  inset: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 8%, rgba(147, 193, 231, .22), transparent 34%),
    radial-gradient(circle at 82% 76%, rgba(238, 157, 190, .13), transparent 32%),
    linear-gradient(145deg, #091326 0%, #14233d 48%, #263755 100%);
  color: #fff;
  font-family: var(--font-serif, "Noto Serif SC", "Songti SC", serif);
  isolation: isolate;
  transition: opacity .72s cubic-bezier(.22, 1, .36, 1),
              visibility .72s,
              filter .72s cubic-bezier(.22, 1, .36, 1);
}

.fe-loader.is-leaving {
  opacity: 0;
  visibility: hidden;
  filter: blur(8px);
  pointer-events: none;
}

.fe-loader__aurora {
  position: absolute;
  z-index: -1;
  top: -32%;
  left: 4%;
  width: 92%;
  height: 72%;
  border-radius: 50%;
  background: linear-gradient(105deg, transparent 22%, rgba(127, 204, 224, .16), rgba(209, 153, 214, .12), transparent 76%);
  filter: blur(38px);
  transform: rotate(-8deg);
  animation: fe-loader-aurora 5s ease-in-out infinite alternate;
}

.fe-loader__content {
  position: relative;
  z-index: 5;
  display: grid;
  width: min(420px, calc(100vw - 56px));
  justify-items: center;
  text-align: center;
  transform: translateY(-2vh);
}

.fe-loader__crystal {
  position: relative;
  order: 1;
  display: grid;
  width: 104px;
  height: 104px;
  margin-bottom: 28px;
  place-items: center;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,.13), rgba(255,255,255,.025) 65%, transparent 66%);
  box-shadow: 0 0 54px rgba(145, 205, 240, .16), inset 0 0 25px rgba(255,255,255,.07);
}

.fe-loader__crystal::before,
.fe-loader__crystal::after {
  position: absolute;
  border: 1px solid rgba(218, 237, 252, .23);
  border-radius: 50%;
  content: "";
}

.fe-loader__crystal::before {
  inset: -9px;
  border-right-color: transparent;
  border-left-color: transparent;
  animation: fe-loader-orbit 5s linear infinite;
}

.fe-loader__crystal::after {
  inset: 10px;
  border-top-color: transparent;
  border-bottom-color: transparent;
  animation: fe-loader-orbit 3.8s linear infinite reverse;
}

.fe-loader__crystal span {
  color: #f5fbff;
  font: 300 43px/1 Georgia, serif;
  text-shadow: 0 0 16px rgba(192, 226, 251, .7), 0 0 38px rgba(231, 176, 207, .35);
  animation: fe-loader-snowflake-spin 8s linear infinite;
}

.fe-loader__content::before {
  order: 2;
  content: "冬日树下的回忆";
  margin: 0 0 42px;
  color: rgba(250, 253, 255, .96);
  font-size: clamp(22px, 3vw, 31px);
  font-weight: 500;
  letter-spacing: .16em;
  text-shadow: 0 4px 24px rgba(0, 0, 0, .22), 0 0 28px rgba(174, 215, 243, .12);
}

.fe-loader__progress {
  position: relative;
  order: 3;
  width: min(300px, 72vw);
  height: 2px;
  overflow: visible;
  background: transparent;
  filter: drop-shadow(0 0 7px rgba(136, 202, 241, .2));
  transform: none;
}

.fe-loader__progress::before {
  position: absolute;
  top: 50%;
  left: 0;
  width: var(--fe-loader-progress);
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, rgba(126, 193, 235, .14) 18%, rgba(166, 218, 248, .72) 72%, rgba(255,255,255,.96) 100%);
  box-shadow: 0 0 10px rgba(132, 201, 241, .34);
  content: "";
  transform: translateY(-50%);
  transition: width .35s cubic-bezier(.22, 1, .36, 1);
}

.fe-loader__progress::after {
  position: absolute;
  top: 50%;
  left: var(--fe-loader-progress);
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 7px 2px #fff, 0 0 17px 5px rgba(145, 210, 247, .78), 0 0 32px 8px rgba(237, 180, 211, .25);
  content: "";
  transform: translate(-50%, -50%);
  transition: left .35s cubic-bezier(.22, 1, .36, 1);
}

.fe-loader__stars,
.fe-loader__snow {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.fe-loader__star {
  position: absolute;
  top: var(--star-top);
  left: var(--star-left);
  width: var(--star-size);
  height: var(--star-size);
  border-radius: 50%;
  opacity: var(--star-opacity);
  background: var(--star-color);
  box-shadow: 0 0 7px rgba(188, 222, 246, .42);
  animation: fe-loader-twinkle var(--star-duration) ease-in-out var(--star-delay) infinite alternate;
}

.fe-loader__snowflake {
  position: absolute;
  top: -10vh;
  left: var(--snow-left);
  width: var(--snow-size);
  height: var(--snow-size);
  border-radius: 50%;
  opacity: var(--snow-opacity);
  background: rgba(242, 249, 255, .92);
  box-shadow: 0 0 8px rgba(205, 231, 250, .58);
  animation: fe-loader-snow var(--snow-duration) linear var(--snow-delay) infinite;
}

.fe-loader__snowflake.is-crystal {
  width: auto;
  height: auto;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  color: rgba(240, 249, 255, .92);
  font-size: calc(var(--snow-size) * 2.4);
  line-height: 1;
  text-shadow: 0 0 8px rgba(205, 231, 250, .62);
}

@keyframes fe-loader-snow {
  0% { transform: translate3d(0, -8vh, 0) rotate(0deg); }
  45% { transform: translate3d(var(--snow-drift), 52vh, 0) rotate(160deg); }
  100% { transform: translate3d(var(--snow-drift-end), 118vh, 0) rotate(360deg); }
}

@keyframes fe-loader-orbit { to { transform: rotate(360deg); } }

@keyframes fe-loader-snowflake-spin {
  from { opacity: .76; transform: rotate(0deg) scale(.96); }
  50% { opacity: 1; transform: rotate(180deg) scale(1.04); }
  to { opacity: .76; transform: rotate(360deg) scale(.96); }
}

@keyframes fe-loader-twinkle {
  from { opacity: var(--star-opacity-low); transform: scale(.72); }
  to { opacity: var(--star-opacity); transform: scale(1.18); }
}

@keyframes fe-loader-aurora {
  from { opacity: .55; transform: translate3d(-3%, 0, 0) rotate(-8deg) scale(.96); }
  to { opacity: 1; transform: translate3d(3%, 5%, 0) rotate(-3deg) scale(1.05); }
}

@media (max-width: 620px) {
  .fe-loader__crystal {
    width: 88px;
    height: 88px;
    margin-bottom: 24px;
  }

  .fe-loader__crystal span { font-size: 37px; }
  .fe-loader__content::before { margin-bottom: 36px; letter-spacing: .1em; }
  .fe-loader__progress { width: min(250px, 70vw); }
}

@media (prefers-reduced-motion: reduce) {
  .fe-loader__aurora,
  .fe-loader__crystal::before,
  .fe-loader__crystal::after,
  .fe-loader__crystal span,
  .fe-loader__star,
  .fe-loader__snowflake {
    animation: none !important;
  }

  .fe-loader__snowflake { top: var(--snow-static-top); }
  .fe-loader { transition-duration: .25s; }
}