/* 数字教材 · 进站启动 / 进入遮罩（纯 CSS，无 GIF） */

.lz-splash {
  --splash-brand: #2563eb;
  --splash-brand-soft: rgba(37, 99, 235, 0.16);
  --splash-ink: #0f172a;
  --splash-muted: #64748b;
  --splash-page: #ffffff;
  --splash-canvas-a: #e8eef6;
  --splash-canvas-b: #f4f7fb;
  box-sizing: border-box;
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background:
    radial-gradient(ellipse 64% 42% at 50% 32%, var(--splash-brand-soft), transparent 62%),
    linear-gradient(165deg, var(--splash-canvas-a) 0%, var(--splash-canvas-b) 48%, #eef2f6 100%);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--splash-ink);
}

.lz-splash *,
.lz-splash *::before,
.lz-splash *::after {
  box-sizing: border-box;
}

.lz-splash--student {
  --splash-brand: #0f766e;
  --splash-brand-soft: rgba(15, 118, 110, 0.16);
  --splash-canvas-a: #e6edf3;
  --splash-canvas-b: #eef2f6;
  font-family: Outfit, "PingFang SC", "Microsoft YaHei", sans-serif;
}

.lz-splash--teacher {
  --splash-brand: #2979ff;
  --splash-brand-soft: rgba(41, 121, 255, 0.14);
  --splash-canvas-a: #f8fafc;
  --splash-canvas-b: #f1f5f9;
  font-family: "Plus Jakarta Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.lz-splash--portal {
  --splash-brand: #2563eb;
  --splash-brand-soft: rgba(37, 99, 235, 0.15);
}

.lz-splash--creation,
.lz-splash--publisher {
  --splash-brand: #536dfe;
  --splash-brand-soft: rgba(83, 109, 254, 0.16);
  --splash-canvas-a: #eef0f8;
  --splash-canvas-b: #f6f7fc;
}

.lz-splash--admin {
  --splash-brand: #409eff;
  --splash-brand-soft: rgba(64, 158, 255, 0.16);
  --splash-canvas-a: #f0f2f5;
  --splash-canvas-b: #f7f8fa;
}

.lz-splash--overlay {
  background: color-mix(in srgb, var(--splash-canvas-b) 78%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.lz-splash__stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.lz-splash__mark {
  position: relative;
  width: 84px;
  height: 64px;
  perspective: 520px;
}

.lz-splash__mark--mini {
  width: 52px;
  height: 40px;
  margin: 0 auto 10px;
  transform: scale(0.72);
  transform-origin: center top;
}

.lz-splash__page {
  position: absolute;
  top: 8px;
  width: 32px;
  height: 46px;
  background:
    linear-gradient(180deg, rgba(15, 23, 42, 0.05), transparent 28%),
    repeating-linear-gradient(
      180deg,
      transparent 0 7px,
      rgba(15, 23, 42, 0.07) 7px 8px
    ),
    var(--splash-page);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

.lz-splash__page--l {
  left: 10px;
  border-radius: 3px 10px 10px 3px;
  transform-origin: right center;
  animation: lz-page-l 2.2s ease-in-out infinite;
}

.lz-splash__page--r {
  right: 10px;
  border-radius: 10px 3px 3px 10px;
  transform-origin: left center;
  animation: lz-page-r 2.2s ease-in-out infinite;
}

.lz-splash__spine {
  position: absolute;
  top: 6px;
  left: 50%;
  width: 4px;
  height: 50px;
  margin-left: -2px;
  border-radius: 2px;
  background: linear-gradient(
    180deg,
    var(--splash-brand, #2563eb),
    color-mix(in srgb, var(--splash-brand, #2563eb) 68%, #0f172a)
  );
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--splash-brand, #2563eb) 18%, transparent);
}

.lz-splash__title {
  margin: 0;
  font-size: 18px;
  font-weight: 650;
  letter-spacing: 0.06em;
  color: var(--splash-ink);
}

.lz-splash__ink {
  position: relative;
  width: 88px;
  height: 2px;
  overflow: hidden;
  border-radius: 999px;
  background: color-mix(in srgb, var(--splash-brand, #2563eb) 28%, #e2e8f0);
}

.lz-splash__ink::after {
  position: absolute;
  inset: 0 auto 0 0;
  width: 42%;
  border-radius: inherit;
  background: var(--splash-brand, #2563eb);
  content: "";
  animation: lz-ink 1.35s ease-in-out infinite;
}

@keyframes lz-page-l {
  0%,
  100% {
    transform: rotateY(16deg) translateZ(0);
  }
  50% {
    transform: rotateY(-18deg) translateZ(6px);
  }
}

@keyframes lz-page-r {
  0%,
  100% {
    transform: rotateY(-12deg) translateZ(0);
  }
  50% {
    transform: rotateY(20deg) translateZ(8px);
  }
}

@keyframes lz-ink {
  0% {
    transform: translateX(-120%);
  }
  100% {
    transform: translateX(280%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .lz-splash__page--l,
  .lz-splash__page--r,
  .lz-splash__ink::after {
    animation: none;
  }

  .lz-splash__page--l {
    transform: rotateY(8deg);
  }

  .lz-splash__page--r {
    transform: rotateY(-8deg);
  }

  .lz-splash__ink::after {
    width: 100%;
    transform: none;
  }
}