/* 枣庄 · 台儿庄水街覆盖层：只剩场景 + 一个返回键。夜戏，所以是暗底而不是纸色。 */

.tz-overlay {
  position: fixed;
  inset: 0;
  /* 同孔庙前庭：必须低于航程画卷（90），否则到岸演出被水街挡住、略过键点不到。 */
  z-index: 62;
  /* 底色取场景远景天空的深蓝，覆盖层边缘与画面接缝看不出来 */
  background:
    radial-gradient(115% 90% at 50% 46%, #12283a 0%, #0b1a26 42%, #060e15 72%, #03080d 100%);
  /* 只做极轻微的推近，不做透明度动画：
     无头截图会把 opacity 动画冻在起始帧，整个人覆盖层就变成半透明的了。 */
  animation: tz-in .55s cubic-bezier(.2, .7, .2, 1) both;
}
.tz-overlay[hidden] { display: none; }
.tz-stage { position: absolute; inset: 0; }
.tz-stage canvas { display: block; }

.tz-back {
  position: absolute;
  top: 18px;
  left: 18px;
  padding: 7px 16px;
  font: 14px/1.4 "Songti SC", "SimSun", serif;
  letter-spacing: .12em;
  color: #f2e2c4;
  background: rgba(10, 22, 32, .74);
  border: 1px solid rgba(240, 178, 110, .38);
  border-radius: 3px;
  cursor: pointer;
  opacity: .62;
  transition: opacity .2s, background .2s, border-color .2s;
  backdrop-filter: blur(4px);
}
.tz-back:hover,
.tz-back:focus-visible {
  opacity: 1;
  background: rgba(24, 42, 56, .96);
  border-color: rgba(255, 190, 120, .72);
  outline: 2px solid rgba(255, 190, 120, .45);
  outline-offset: 2px;
}

.tz-hint {
  position: absolute;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  margin: 0;
  padding: 6px 16px;
  font: 13px/1.5 "Songti SC", "SimSun", serif;
  letter-spacing: .16em;
  color: #e6d4b6;
  background: rgba(8, 18, 26, .58);
  border-radius: 999px;
  pointer-events: none;
  animation: tz-hint 7s ease-in-out both;
}

@keyframes tz-in {
  from { transform: scale(1.02); }
  to { transform: none; }
}
@keyframes tz-hint {
  0%, 55% { opacity: .88; }
  100% { opacity: 0; }
}

/* 覆盖层打开时锁住底图滚动与选中 */
body.tz-open { overflow: hidden; }

@media (max-width: 560px) {
  .tz-back { top: 12px; left: 12px; padding: 6px 12px; font-size: 13px; }
  .tz-hint { bottom: 14px; font-size: 12px; letter-spacing: .1em; }
}

@media (prefers-reduced-motion: reduce) {
  .tz-overlay, .tz-hint { animation: none; }
  .tz-hint { opacity: .88; }
}