html, body {
  font-family: "NotoSansCJKsc", "Roboto", sans-serif;
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
}

#loading-screen {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #1D4ED8;
  transition: opacity 0.35s ease;
}

#loading-screen.fade-out {
  opacity: 0;
  pointer-events: none;
}

#loading-screen .logo {
  width: 88px;
  height: 88px;
  background: #fff;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

#loading-screen .logo img {
  width: 72px;
  height: 72px;
  object-fit: contain;
}

#loading-screen .app-name {
  margin-top: 24px;
  color: #fff;
  font-size: 28px;
  font-weight: 700;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", sans-serif;
}

#loading-screen .app-desc {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  font-weight: 500;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", sans-serif;
}

#loading-screen .loader {
  margin-top: 48px;
  width: 28px;
  height: 28px;
  border: 3px solid rgba(255, 255, 255, 0.25);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

#loading-screen .hint {
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 12px;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", sans-serif;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}