:root {
  --daitang-paper: #fffefe;
  --daitang-ink: #7ea8ca;
  --daitang-sky: #a9cfe8;
  --daitang-sky-soft: #d9edf7;
  --daitang-pink: #d9a9cb;
  --daitang-pink-soft: #f0ddea;
  --daitang-violet: #a9a9df;
  --daitang-mint: #9bcfc6;
  --daitang-gold: #dab777;
  --daitang-muted: #8c93a3;
}

* { box-sizing: border-box; }

html:has(#__loading_overlay),
body:has(#__loading_overlay) { overflow: hidden; }

#__loading_overlay {
  position: fixed;
  inset: 0;
  z-index: 99999;
  width: 100%;
  min-height: 100svh;
  height: 100dvh;
  display: grid;
  place-items: center;
  padding: max(24px, env(safe-area-inset-top)) max(24px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) max(24px, env(safe-area-inset-left));
  overflow: hidden;
  background:
    linear-gradient(rgba(145, 187, 216, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(145, 187, 216, .045) 1px, transparent 1px),
    var(--daitang-paper);
  background-size: 56px 56px;
  transition: opacity .8s ease, visibility .8s ease;
}

#__loading_overlay::before,
#__loading_overlay::after {
  content: "";
  position: absolute;
  width: min(18vw, 250px);
  height: min(38vh, 330px);
  border: solid rgba(169, 207, 232, .32);
  pointer-events: none;
}

#__loading_overlay::before {
  top: 8%;
  left: 5%;
  border-width: 2px 0 0 2px;
}

#__loading_overlay::after {
  right: 5%;
  bottom: 8%;
  border-width: 0 2px 2px 0;
}

#__loading_overlay.fade_out {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

.__loading_panel {
  position: relative;
  z-index: 1;
  width: min(94vw, 1040px);
  min-height: 480px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transform: translateY(-1.5vh);
}

.__loading_progress {
  width: min(50vw, 350px);
  margin-top: 24px;
}

#__progress_track {
  position: relative;
  width: 100%;
  height: 2px;
  overflow: hidden;
  background: #e7eff4;
}

#__progress_fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  background: linear-gradient(90deg, var(--daitang-sky), var(--daitang-violet) 42%, var(--daitang-pink) 75%, var(--daitang-mint));
  transition: width .28s ease;
}

#__progress_text {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

#__loading_tip {
  margin-top: 13px;
  color: var(--daitang-muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 12px;
  letter-spacing: 0;
  opacity: 0;
  animation: __daitang_tip_in .65s ease 1s forwards;
}

@keyframes __daitang_tip_in { to { opacity: 1; } }

@media (max-width: 680px) {
  #__loading_overlay {
    padding: max(16px, env(safe-area-inset-top)) max(8px, env(safe-area-inset-right)) max(16px, env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-left));
  }

  .__loading_panel {
    width: min(100vw, 640px);
    min-height: 420px;
  }

  .__loading_progress {
    width: min(70vw, 300px);
    margin-top: 18px;
  }
}

@media (max-height: 520px) and (orientation: landscape) {
  .__loading_panel {
    min-height: 0;
    height: 100%;
    width: min(82vw, 760px);
  }

  .__loading_signature { width: min(72vw, 680px); }
  .__loading_progress { margin-top: 8px; }
  #__loading_tip { margin-top: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  #__loading_overlay { transition-duration: .01ms; }
  #__loading_tip { opacity: 1; animation: none; }
}