/* ===== scene-overlay.css —— 全屏场景覆盖层（结构与样式对齐原站） ===== */

#sceneOverlay {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 5000;
  display: block;
  box-sizing: border-box;
  background: #03050a;
  border: none;
  box-shadow: none;
  overflow: hidden;
}

/* 隐藏时不能用 display:none —— 会中断预热 iframe 的绘制，仅做视觉隐藏 */
#sceneOverlay[hidden] {
  display: block !important;
  visibility: hidden;
  pointer-events: none;
  background: transparent;
}

/* 预热中的 iframe 必须仍可绘制，否则切页时会露出遮罩底色 */
#sceneOverlay[hidden] .scene-frame.is-pending { visibility: visible; }

/* 外框 HUD 准星（与卡片风格一致） */
#sceneOverlay::before {
  content: '';
  position: absolute;
  top: -1px; left: -1px; right: -1px; bottom: -1px;
  background:
    linear-gradient(to right, var(--accent) 2px, transparent 2px) 0 0,
    linear-gradient(to bottom, var(--accent) 2px, transparent 2px) 0 0,
    linear-gradient(to left, var(--accent) 2px, transparent 2px) 100% 0,
    linear-gradient(to bottom, var(--accent) 2px, transparent 2px) 100% 0,
    linear-gradient(to right, var(--accent) 2px, transparent 2px) 0 100%,
    linear-gradient(to top, var(--accent) 2px, transparent 2px) 0 100%,
    linear-gradient(to left, var(--accent) 2px, transparent 2px) 100% 100%,
    linear-gradient(to top, var(--accent) 2px, transparent 2px) 100% 100%;
  background-repeat: no-repeat;
  background-size: 18px 18px;
  opacity: 0.85;
  pointer-events: none;
  z-index: 2;
}

/* --- 顶部控制条：默认隐藏，靠右上角热区 hover 显现 --- */
.scene-chrome {
  position: absolute;
  top: 0; left: 0; right: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-shrink: 0;
  padding: 8px 14px;
  border-bottom: 1px solid rgba(0, 243, 255, 0.25);
  background: linear-gradient(90deg, rgba(0, 40, 80, 0.55), rgba(0, 20, 40, 0.25));
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
}

/* 右上角热区：控制条整体 pointer-events:none，由它承接 hover 触发显现 */
.scene-chrome-hotspot {
  position: absolute;
  top: 0; right: 0;
  width: 96px; height: 44px;
  pointer-events: auto;
}

.scene-chrome:hover,
.scene-chrome:focus-within { opacity: 1; }

.scene-chrome-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

#sceneLabel {
  color: #f5fbff;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 3px;
  text-shadow: 0 0 10px rgba(0, 243, 255, 0.7);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.scene-hint {
  color: rgba(0, 243, 255, 0.55);
  font-size: 11px;
  letter-spacing: 1px;
}

#sceneClose {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  cursor: pointer;
  pointer-events: auto;
  color: #00f3ff;
  background: rgba(0, 30, 80, 0.4);
  border: 1px solid rgba(0, 243, 255, 0.45);
  padding: 6px 14px;
  font-size: 12px;
  letter-spacing: 3px;
  font-family: inherit;
  box-shadow: inset 0 0 10px rgba(0, 243, 255, 0.12);
  transition: all 0.2s ease;
}

#sceneClose:hover {
  background: rgba(0, 243, 255, 0.16);
  box-shadow: 0 0 12px rgba(0, 243, 255, 0.35);
}

/* 右下角空白处：点击退出（保留原有交互；原站静态结构中未见该元素，见说明） */
.scene-exit-hotspot {
  position: absolute;
  right: 0; bottom: 0;
  width: 200px; height: 140px;
  z-index: 4;
  pointer-events: auto;
  cursor: pointer;
}

/* iframe：前台绘制，后台预热移出视口但保持全尺寸以避免切页露底 */
.scene-frame {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: 0;
  background: #000;
  z-index: 1;
  transition: top 0.9s ease, height 0.9s ease;
}
.scene-frame.is-pending { left: -100%; pointer-events: none; z-index: 0; }

/* 加载态 */
.scene-loading {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: var(--bg);
  color: var(--text-dim);
}
#sceneOverlay:not(.is-loading) .scene-loading { display: none; }
.scene-loading-ring {
  width: 54px; height: 54px;
  border: 3px solid var(--accent-soft);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
.scene-loading-text { font-size: 13px; letter-spacing: 2px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* 追问框（预留） */
.end-qa-overlay {
  position: fixed;
  inset: 0;
  z-index: 6000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(3, 5, 10, 0.42);
}
.end-qa-overlay[hidden] { display: none; }
.end-qa-frame {
  position: relative;
  box-sizing: border-box;
  width: min(78vw, 1280px);
  padding: 6vh 4.5vw 5vh;
  border: 1px solid var(--accent-soft);
  background: var(--bg-panel);
  box-shadow: 0 0 28px rgba(0, 243, 255, 0.16), inset 0 0 40px var(--accent-faint);
}
.end-qa-frame::before {
  content: '';
  position: absolute;
  inset: 8px;
  pointer-events: none;
  background:
    linear-gradient(var(--accent), var(--accent)) 0 0 / 18px 2px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 0 0 / 2px 18px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 100% 0 / 18px 2px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 100% 0 / 2px 18px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 0 100% / 18px 2px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 0 100% / 2px 18px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 100% 100% / 18px 2px no-repeat,
    linear-gradient(var(--accent), var(--accent)) 100% 100% / 2px 18px no-repeat;
}
.end-qa-kicker { color: var(--accent); letter-spacing: 0.28em; font-size: 0.75vw; margin-bottom: 1.4vh; }
.end-qa-title { margin: 0; color: var(--text-strong); font-size: 2.3vw; font-weight: 800; letter-spacing: 0.08vw; text-shadow: 0 0 16px rgba(0, 243, 255, 0.45); }
.end-qa-list { list-style: none; margin: 4vh 0 0; padding: 0; display: grid; gap: 2vh; }
.end-qa-list li { padding-left: 18px; border-left: 2px solid var(--accent); color: var(--text-strong); font-size: 1.7vw; line-height: 1.5; }