.prologue-overlay {
  position: absolute;
  z-index: 70;
  inset: 0;
  overflow: hidden;
  color: #fff;
  background: #123b58;
  cursor: pointer;
  touch-action: manipulation;
}

.prologue-backdrop {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(15, 47, 75, 0.08) 0 42%, rgba(9, 28, 50, 0.96) 88%),
    url("./assets/scene-coral.webp") 50% / cover no-repeat;
  filter: saturate(0.82) brightness(0.78);
  transform: scale(1.04);
  animation: prologue-drift 12s ease-in-out infinite alternate;
}

.prologue-brand {
  position: absolute;
  z-index: 3;
  top: calc(22px + env(safe-area-inset-top));
  left: 20px;
  display: flex;
  flex-direction: column;
  text-shadow: 0 3px 12px rgba(0, 18, 36, 0.72);
}

.prologue-brand small { color: #ffe47e; font-size: 8px; font-weight: 950; letter-spacing: 0.16em; }
.prologue-brand b { margin-top: 3px; font-size: 19px; font-style: italic; letter-spacing: 0.05em; }
.prologue-progress { position: absolute; z-index: 4; top: calc(28px + env(safe-area-inset-top)); right: 20px; font-size: 9px; font-weight: 950; }

.prologue-cast {
  position: absolute;
  z-index: 2;
  top: 2%;
  right: -16%;
  left: -16%;
  height: 96%;
  overflow: hidden;
}

.prologue-cast img { position: absolute; width: 88%; height: 100%; object-fit: contain; object-position: 50% 0; clip-path: none; filter: drop-shadow(0 18px 26px rgba(2, 18, 35, 0.55)); scale: 1.05; transform-origin: 50% 0; }
.prologue-companion { right: -5%; opacity: 0.55; transform: scale(0.82) translateY(5%); }
.prologue-portrait { z-index: 2; left: 0; animation: prologue-hero-enter 0.45s ease-out both, prologue-hero-breathe 4s 0.5s ease-in-out infinite; }

.prologue-dialogue {
  position: absolute;
  z-index: 5;
  right: 14px;
  bottom: calc(18px + env(safe-area-inset-bottom));
  left: 14px;
  min-height: 236px;
  padding: 20px 18px;
  border: 3px solid rgba(255,255,255,0.94);
  border-radius: 24px 7px 24px 7px;
  background: linear-gradient(135deg, rgba(3, 29, 52, 0.99), rgba(7, 73, 92, 0.985));
  box-shadow: 0 24px 58px rgba(0, 10, 28, 0.72), 0 0 0 5px rgba(116, 236, 223, 0.12);
  backdrop-filter: blur(13px);
}

.prologue-dialogue > small { color: #9cefe3; font-size: 8px; font-weight: 950; letter-spacing: 0.14em; }
.prologue-dialogue > b { display: inline-block; margin-top: 7px; padding: 4px 10px; border-left: 4px solid #ffe178; border-radius: 0 8px 8px 0; color: #ffe47e; background: rgba(0,18,34,0.52); font-size: 19px; }
.prologue-dialogue > p { min-height: 76px; margin: 10px 0 14px; font-size: 16px; font-weight: 800; line-height: 1.68; text-shadow: 0 2px 7px rgba(0,10,22,0.72); }
.prologue-actions { display: grid; grid-template-columns: 92px 1fr; gap: 8px; }
.prologue-actions button { min-height: 56px; border-radius: 14px 5px 14px 5px; font-weight: 900; cursor: pointer; }
.prologue-skip { border: 1px solid rgba(255,255,255,0.4); color: #d3ecec; background: rgba(1,23,40,0.35); }
.prologue-next { display: flex; align-items: center; justify-content: space-between; padding: 0 15px; border: 0; color: #203b4f; background: linear-gradient(135deg, #ffe47e, #f2aa62); box-shadow: 0 4px 0 #9a6540; }
.prologue-next b { font-size: 22px; }

.tutorial-focus-ring {
  position: fixed;
  z-index: 43;
  top: var(--focus-top);
  left: var(--focus-left);
  width: var(--focus-width);
  height: var(--focus-height);
  border: 3px solid #fff19a;
  border-radius: 18px;
  box-shadow: 0 0 0 999px rgba(4, 25, 43, 0.5), 0 0 0 6px rgba(255, 225, 100, 0.25), 0 0 22px #fff19a;
  pointer-events: none;
  animation: tutorial-focus-pulse 1.35s ease-in-out infinite;
}

.is-tutorial-focus { position: relative; z-index: 44 !important; }
/* 建设抽屉必须继续以游戏画布为定位基准，宽屏下不能退化为视口级面板。 */
.construction-panel.is-tutorial-focus { position: absolute; }

/* 剧情层打开时暂时收起教学聚焦，关闭剧情后由状态自动恢复。 */
.app:has(.chapter-briefing:not([hidden])) .tutorial-focus-ring,
.app:has(.chapter-briefing:not([hidden])) .tutorial-coach { display: none; }
.app:has(.chapter-briefing:not([hidden])) .is-tutorial-focus { z-index: auto !important; }

.tutorial-coach {
  position: fixed;
  z-index: 45;
  top: var(--tutorial-coach-top, 150px);
  right: 12px;
  left: 12px;
  display: grid;
  grid-template-columns: 48px 1fr auto;
  align-items: center;
  gap: 10px;
  max-width: 496px;
  min-height: 96px;
  margin: 0 auto;
  padding: 10px 10px 10px 7px;
  border: 2px solid rgba(255,255,255,0.9);
  border-radius: 21px 7px 21px 7px;
  color: #fff;
  background: linear-gradient(135deg, rgba(13, 55, 81, 0.97), rgba(31, 112, 119, 0.96));
  box-shadow: 0 16px 36px rgba(0, 25, 40, 0.42);
  pointer-events: none;
}

.tutorial-coach img { width: 48px; height: 72px; object-fit: cover; object-position: 50% 12%; border-radius: 16px 5px 16px 5px; background: #dff6eb; }
.tutorial-copy { min-width: 0; }
.tutorial-step { color: #ffe47e; font-size: 7px; font-weight: 950; letter-spacing: 0.12em; }
.tutorial-copy strong { display: block; margin: 2px 0 3px; font-size: 12px; }
.tutorial-copy p { margin: 0; color: #e5fffa; font-size: 9px; font-weight: 700; line-height: 1.45; }
.tutorial-skip { align-self: start; min-width: 44px; min-height: 44px; padding: 0 7px; border: 1px solid rgba(255,255,255,0.35); border-radius: 12px 4px 12px 4px; color: #d9f5f1; background: rgba(2,25,43,0.28); font-size: 7px; font-weight: 900; pointer-events: auto; cursor: pointer; }

.bottom-nav { grid-template-columns: repeat(4, 1fr); }

@keyframes prologue-drift { to { transform: scale(1.08) translate3d(-1%, -1%, 0); } }
@keyframes prologue-hero-enter { from { opacity: 0; transform: translate3d(-8%, 3%, 0); } }
@keyframes prologue-hero-breathe { 50% { transform: translate3d(0, -5px, 0) scale(1.01); } }
@keyframes tutorial-focus-pulse { 50% { filter: brightness(1.15); box-shadow: 0 0 0 999px rgba(4,25,43,0.55), 0 0 0 9px rgba(255,225,100,0.14), 0 0 29px #fff19a; } }

@media (max-height: 700px) {
  .prologue-cast { top: 2%; height: 96%; }
  .prologue-dialogue { min-height: 208px; padding: 14px 15px; }
  .prologue-dialogue > p { min-height: 64px; margin: 7px 0 9px; font-size: 15px; }
  .tutorial-coach { min-height: 82px; }
  .tutorial-coach img { height: 62px; }
}

@media (prefers-reduced-motion: reduce) {
  .prologue-backdrop,
  .prologue-portrait,
  .tutorial-focus-ring { animation: none !important; }
}