html {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body {
  font-family: 'Arial', sans-serif;
  background: #000;
  overflow: hidden;
  color: #fff;
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  /* 禁用文本选择 */
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  /* 禁用触摸时的高亮 */
  -webkit-tap-highlight-color: transparent;
  /* 禁用拖拽 */
  -webkit-user-drag: none;
  -khtml-user-drag: none;
  -moz-user-drag: none;
  -o-user-drag: none;
  user-drag: none;
}

/* 禁用所有元素的选择和拖拽 - 使用!important确保优先级 */
* {
  user-select: none !important;
  -webkit-user-select: none !important;
  -moz-user-select: none !important;
  -ms-user-select: none !important;
  -webkit-user-drag: none !important;
  -khtml-user-drag: none !important;
  -moz-user-drag: none !important;
  -o-user-drag: none !important;
  user-drag: none !important;
  -webkit-touch-callout: none !important;
}

/* 特别针对文本元素 */
div,
span,
p,
h1,
h2,
h3,
h4,
h5,
h6,
button,
a,
label {
  user-select: none !important;
  -webkit-user-select: none !important;
  -moz-user-select: none !important;
  -ms-user-select: none !important;
}

/* 禁用图片拖拽 */
img {
  -webkit-user-drag: none !important;
  -khtml-user-drag: none !important;
  -moz-user-drag: none !important;
  -o-user-drag: none !important;
  user-drag: none !important;
  pointer-events: none;
}

/* 确保按钮可以点击但不能选择文本 */
button {
  pointer-events: auto;
  cursor: pointer;
}

/* 预加载动画 */
#preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99999;
  transition: opacity 0.5s ease-out;
}

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

.preloader-content {
  text-align: center;
  max-width: 500px;
  padding: 20px;
}

.preloader-logo {
  font-size: 3vw;
  font-weight: bold;
  color: #ff0000;
  text-shadow:
    0 0 10px #ff0000,
    0 0 20px #ff0000,
    0 0 30px #ff0000,
    2px 2px 4px #000;
  margin-bottom: 40px;
  font-family: 'Courier New', monospace;
  letter-spacing: 0.2em;
  line-height: 1.3;
  animation: glowPulse 2s ease-in-out infinite;
}

@keyframes glowPulse {

  0%,
  100% {
    text-shadow:
      0 0 10px #ff0000,
      0 0 20px #ff0000,
      0 0 30px #ff0000,
      2px 2px 4px #000;
  }

  50% {
    text-shadow:
      0 0 20px #ff0000,
      0 0 30px #ff0000,
      0 0 40px #ff0000,
      0 0 50px #ff0000,
      2px 2px 4px #000;
  }
}

.preloader-spinner {
  position: relative;
  width: 80px;
  height: 80px;
  margin: 0 auto 30px;
}

.spinner-ring {
  position: absolute;
  width: 100%;
  height: 100%;
  border: 3px solid transparent;
  border-top-color: #ff0000;
  border-radius: 50%;
  animation: spin 1.5s linear infinite;
}

.spinner-ring:nth-child(2) {
  width: 70%;
  height: 70%;
  top: 15%;
  left: 15%;
  border-top-color: #cc0000;
  animation-duration: 1.2s;
  animation-direction: reverse;
}

.spinner-ring:nth-child(3) {
  width: 40%;
  height: 40%;
  top: 30%;
  left: 30%;
  border-top-color: #990000;
  animation-duration: 0.9s;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

.preloader-text {
  font-size: 1.5vw;
  color: #fff;
  font-family: 'Courier New', monospace;
  margin-bottom: 20px;
  letter-spacing: 0.3em;
}

.loading-dots::after {
  content: '...';
  animation: loadingDots 1.5s steps(4, end) infinite;
}

@keyframes loadingDots {

  0%,
  20% {
    content: '.';
  }

  40% {
    content: '..';
  }

  60%,
  100% {
    content: '...';
  }
}

.preloader-progress {
  width: 100%;
  height: 4px;
  background: #333;
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 10px;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #ff0000, #cc0000);
  width: 0%;
  transition: width 0.3s ease;
  box-shadow: 0 0 10px #ff0000;
}

.preloader-percentage {
  font-size: 1.2vw;
  color: #888;
  font-family: 'Courier New', monospace;
}

/* 通用隐藏类 */
.hidden {
  display: none !important;
}

/* 加载动画 */
.loading {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 24px;
  color: #fff;
  font-family: 'Courier New', monospace;
  z-index: 1000;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.3;
  }
}

#game-container {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

/* 游戏画面 */
#game-screen {
  width: 100%;
  height: 100%;
  position: relative;
  display: none;
  overflow: hidden;
  background: #000;
}

#game-screen.active {
  display: block;
}

#current-scene {
  position: absolute;
  height: 100%;
  width: 150%;
  object-fit: cover;
  left: 0;
  top: 0;
  transition: left 0.05s linear;
  display: block;
}

/* 热区 */
#hotspots {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hotspot {
  position: absolute;
  cursor: pointer;
  pointer-events: auto;
  transition: opacity 0.2s;
}

.hotspot:hover {
  opacity: 0.8;
}

/* UI 覆盖层 */
#ui-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
  font-family: 'Courier New', monospace;
  font-weight: bold;
}

/* 左上角 UI */
#top-left-ui {
  position: absolute;
  top: 2vh;
  left: 2vw;
  color: white;
  text-shadow: 2px 2px 4px #000;
}

#time-display {
  font-size: 2.5vw;
  margin-bottom: 0.5vh;
}

#night-display {
  font-size: 1.5vw;
  color: #ccc;
}

/* 右下角 UI */
#bottom-right-ui {
  position: absolute;
  bottom: 2vh;
  right: 2vw;
  color: white;
  text-shadow: 2px 2px 4px #000;
}

#oxygen-display {
  display: flex;
  align-items: center;
  gap: 0;
  font-size: 2vw;
  font-weight: bold;
}

#oxygen-display .vent-icon {
  margin-right: 1vw;
}

#power-value {
  margin: 0;
}

.percent-sign {
  margin-left: 0.1vw;
  margin-right: 0;
}

.oxygen-unit {
  margin-left: 1.2vw;
  display: inline-flex;
  align-items: baseline;
}

#oxygen-display sub {
  font-size: 1vw;
  vertical-align: sub;
  line-height: 0;
}

.vent-icon {
  width: 3vw;
  height: 3vw;
  object-fit: contain;
  transition: none;
  /* 禁用默认过渡，使用animation */
  animation: spin-fast 0.333s linear infinite;
  /* 默认快速旋转（通风口开启）- 1秒3圈 */
}

/* 风扇旋转动画 - 快速（通风口开启） */
@keyframes spin-fast {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

/* 风扇旋转动画 - 慢速（减速中） */
@keyframes spin-slow {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

/* 风扇停止状态 */
.vent-icon.stopped {
  animation: none;
}

/* 风扇减速状态 */
.vent-icon.slowing {
  animation: spin-slow 3s linear infinite;
}

/* 风扇加速状态 */
.vent-icon.speeding-up {
  animation: spin-slow 3s linear infinite;
}

animation: spin 0.8s linear infinite;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

/* 游戏按钮 */
.game-button {
  position: absolute;
  width: 8vw;
  height: 8vh;
  background: rgba(255, 0, 0, 0.1);
  border: 2px solid rgba(255, 0, 0, 0.3);
  cursor: pointer;
  transition: all 0.3s;
  pointer-events: auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.game-button:hover {
  background: rgba(255, 0, 0, 0.3);
  border-color: rgba(255, 0, 0, 0.8);
  box-shadow: 0 0 20px rgba(255, 0, 0, 0.5);
}

.game-button .button-hint {
  opacity: 0;
  color: white;
  font-size: 1.2vw;
  font-weight: bold;
  text-shadow: 2px 2px 4px #000;
  transition: opacity 0.3s;
  pointer-events: none;
}

.game-button:hover .button-hint {
  opacity: 1;
}

/* 左下角：控制面板按钮 */
#control-panel-btn {
  bottom: 2vh;
  left: 2vw;
}

/* 右侧中间：摄像头按钮 */
#camera-btn {
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  height: 15vh;
  width: 5vw;
}

/* 摄像头面板 - 从右往左滑入 + 缩放效果 */
#camera-panel {
  position: absolute;
  top: 5vh;
  right: 7vw;
  width: 70vw;
  height: calc(70vw * 0.75);
  /* 保持4:3宽高比 */
  max-height: 80vh;
  /* 但不超过80vh */
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-color: #000;
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  padding: 0;
  transform: translateX(calc(100% + 7vw)) scale(0.5);
  transform-origin: right center;
  transition: transform 0.4s ease-in-out;
  border: 3px solid #444;
  box-shadow: -5px 0 20px rgba(0, 0, 0, 0.7);
  opacity: 0;
  overflow: hidden;
  /* 防止EP图片溢出到摄像头面板外 */
}

#camera-panel.show {
  transform: translateX(0) scale(1);
  opacity: 1;
}

#camera-panel.closing {
  transform: translateX(calc(100% + 7vw)) scale(0.5);
  opacity: 0;
}

#camera-panel.transitioning {
  background-image: none !important;
}

/* 当前摄像头标签 */
#current-cam-label {
  position: absolute;
  top: 15px;
  left: 15px;
  font-size: 24px;
  font-weight: bold;
  color: #fff;
  font-family: Arial, sans-serif;
  text-shadow: 2px 2px 4px #000;
  z-index: 1;
}

/* 角色图层容器 */
#character-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

#character-overlay img {
  position: absolute;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  opacity: 0;
  transition: opacity 0.3s;
}

#character-overlay img.visible {
  opacity: 1;
}

/* 摄像头切换静态噪点 */
#camera-static-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  z-index: 2;
  opacity: 0;
  transition: opacity 0.2s;
  display: none;
}

#camera-static-video.active {
  display: block;
  opacity: 0.8;
}

/* 摄像头故障标识 */
#camera-error-label {
  position: absolute;
  top: 15px;
  right: 25px;
  font-size: 48px;
  font-weight: bold;
  color: #f00;
  font-family: Arial, sans-serif;
  text-shadow: 2px 2px 4px #000;
  z-index: 3;
  display: none;
}

#camera-error-label.active {
  display: block;
  /* 移除闪烁动画 */
}

/* 地图容器 - 移到左下角 */
#camera-grid {
  position: absolute;
  bottom: 15px;
  left: 15px;
  width: 28vw;
  max-width: 380px;
  z-index: 1;
}

.camera-hotspot {
  position: absolute;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
}

.camera-hotspot:hover {
  transform: scale(1.05);
}

/* 选中的摄像头绿色闪烁动画 */
.camera-selected {
  animation: greenPulse 1s ease-in-out infinite;
}

@keyframes greenPulse {

  0%,
  100% {
    background: rgba(0, 255, 0, 0.6);
  }

  50% {
    background: rgba(0, 255, 0, 0.2);
  }
}

/* ELECTROCUTE 按钮（霍金电击） - 只在cam6显示 */
#shock-hawking-btn {
  position: absolute;
  bottom: 100px;
  right: 25px;
  width: 280px;
  padding: 20px 0;
  font-size: 24px;
  background: rgba(0, 0, 0, 0.7);
  border: 3px solid #fff;
  color: #fff;
  cursor: pointer;
  transition: all 0.3s;
  font-family: Arial, sans-serif;
  font-weight: bold;
  letter-spacing: 4px;
  z-index: 1;
  text-align: center;
  display: none;
  /* 默认隐藏 */
  box-sizing: border-box;
}

#shock-hawking-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.05);
}

#shock-hawking-btn:active {
  transform: scale(0.95);
}

/* PLAY SOUND 按钮 */
#play-sound-btn {
  position: absolute;
  bottom: 25px;
  right: 25px;
  width: 280px;
  padding: 20px 0;
  font-size: 24px;
  background: rgba(0, 0, 0, 0.7);
  border: 3px solid #fff;
  color: #fff;
  cursor: pointer;
  transition: all 0.3s;
  font-family: Arial, sans-serif;
  font-weight: bold;
  letter-spacing: 4px;
  z-index: 1;
  text-align: center;
  box-sizing: border-box;
}

#play-sound-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.05);
}

/* 摄像头关闭按钮 - 手机端显示 */
#close-camera {
  display: none;
}

/* 主菜单 */
#main-menu {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('assets/images/menubackground.png') center/cover;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding-left: 5%;
  z-index: 100;
}

#main-menu>h1 {
  margin-top: -10vh;
  /* 整体上移 */
}

/* 星星图标 - 放在中间偏上位置 */
#star-icon {
  position: absolute;
  top: 15vh;
  left: 50%;
  transform: translateX(-50%);
  width: 5vw;
  max-width: 80px;
  height: auto;
  z-index: 103;
  animation: star-glow 2s ease-in-out infinite;
}

/* 第二颗星星 - 在第一颗下面 */
#star-icon-2 {
  position: absolute;
  top: 22vh;
  /* 比第一颗低7vh */
  left: 50%;
  transform: translateX(-50%);
  width: 5vw;
  max-width: 80px;
  height: auto;
  z-index: 103;
  animation: star-glow 2s ease-in-out infinite 0.5s;
  /* 延迟0.5s，产生交替闪烁效果 */
}

/* 第三颗星星 - 在第二颗下面 (20/20/20通关) */
#star-icon-3 {
  position: absolute;
  top: 29vh;
  /* 比第二颗低7vh */
  left: 50%;
  transform: translateX(-50%);
  width: 5vw;
  max-width: 80px;
  height: auto;
  z-index: 103;
  animation: star-glow 2s ease-in-out infinite 1s;
  /* 延迟1s，产生交替闪烁效果 */
}

@keyframes star-glow {

  0%,
  100% {
    filter: drop-shadow(0 0 10px rgba(255, 215, 0, 0.8));
    transform: translateX(-50%) scale(1);
  }

  50% {
    filter: drop-shadow(0 0 20px rgba(255, 215, 0, 1));
    transform: translateX(-50%) scale(1.05);
  }
}

/* Golden 霍金闪烁动画 */
@keyframes golden-flicker {
  0% {
    opacity: 0;
  }

  10% {
    opacity: 1;
  }

  20% {
    opacity: 0;
  }

  30% {
    opacity: 1;
  }

  40% {
    opacity: 0.5;
  }

  50% {
    opacity: 1;
  }

  60% {
    opacity: 0.8;
  }

  70% {
    opacity: 1;
  }

  80% {
    opacity: 0.6;
  }

  90% {
    opacity: 1;
  }

  100% {
    opacity: 0;
  }
}

/* 静态雪花效果 - 使用 canvas */
#static-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 101;
  opacity: 0.5;
  /* 增强透明度，从 0.25 改成 0.5 */
  mix-blend-mode: screen;
  /* 改用 screen 模式，更明显 */
}

#main-menu>h1,
#main-menu>button,
#main-menu>img {
  position: relative;
  z-index: 102;
}

#main-menu h1 {
  font-size: 5vw;
  margin-bottom: 5vh;
  text-shadow: 4px 4px 8px rgba(0, 0, 0, 0.8);
  color: #fff;
  font-family: 'Courier New', monospace;
  font-weight: bold;
  letter-spacing: 2px;
  line-height: 1.2;
}

/* 音量按钮 */
#volume-btn {
  position: fixed;
  top: 2vh;
  right: 2vw;
  padding: 15px 25px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 102;
  /* 在白噪声(101)上面，但低于其他UI(103) */
  transition: all 0.2s;
  font-family: 'Courier New', monospace;
  font-size: 18px;
  font-weight: bold;
  color: #fff;
  letter-spacing: 3px;
  text-shadow: 4px 4px 8px rgba(0, 0, 0, 0.8);
}

#volume-btn:hover {
  transform: scale(1.05);
  text-shadow: 4px 4px 12px rgba(0, 0, 0, 1);
}

/* 音量设置面板 */
#volume-panel {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.98);
  border: 2px solid #666;
  border-radius: 0;
  padding: 20px;
  z-index: 105;
  /* 面板要在最上面 */
  min-width: 400px;
  max-width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.9), inset 0 0 20px rgba(0, 0, 0, 0.5);
}

#volume-panel h3 {
  color: #ff0000;
  font-family: 'Courier New', monospace;
  font-size: 18px;
  margin-bottom: 15px;
  margin-top: 0;
  text-align: center;
  letter-spacing: 3px;
  text-shadow:
    0 0 10px #ff0000,
    0 0 20px #ff0000,
    2px 2px 4px #000;
}

.volume-item {
  margin-bottom: 15px;
}

.volume-item label {
  color: #ff0000;
  font-family: 'Courier New', monospace;
  font-size: 12px;
  display: block;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 1px;
  text-shadow:
    0 0 5px #ff0000,
    0 0 10px #ff0000;
}

.volume-slider-container {
  display: flex;
  align-items: center;
  gap: 10px;
}

.volume-slider-container input[type="range"] {
  flex: 1;
  height: 3px;
  background: #333;
  outline: none;
  border-radius: 0;
  cursor: pointer;
  border: 1px solid #555;
}

.volume-slider-container input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 12px;
  height: 12px;
  background: #666;
  border-radius: 0;
  cursor: pointer;
  border: 1px solid #888;
}

.volume-slider-container input[type="range"]::-moz-range-thumb {
  width: 12px;
  height: 12px;
  background: #666;
  border-radius: 0;
  cursor: pointer;
  border: 1px solid #888;
}

.volume-percent {
  color: #777;
  font-family: 'Courier New', monospace;
  font-size: 13px;
  min-width: 45px;
  text-align: right;
}

#close-volume-panel {
  width: 100%;
  padding: 8px;
  margin-top: 10px;
  background: #222;
  color: #888;
  border: 1px solid #555;
  border-radius: 0;
  font-family: 'Courier New', monospace;
  font-size: 13px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 2px;
}

#close-volume-panel:hover {
  background: #333;
  color: #aaa;
  border-color: #777;
}

#main-menu button {
  width: 20vw;
  min-width: 200px;
  padding: 1.5vh 2vw;
  margin: 1.5vh 0;
  font-size: 1.8vw;
  background: transparent;
  border: none;
  color: #fff;
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
  font-family: 'Courier New', monospace;
  font-weight: bold;
  letter-spacing: 3px;
  white-space: nowrap;
}

#main-menu button::before {
  content: '> ';
  opacity: 0;
  transition: opacity 0.2s;
}

#main-menu button:hover::before,
#main-menu button:focus::before {
  opacity: 1;
}

#main-menu button:hover {
  transform: translateX(10px);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

/* 特殊夜晚按钮 */
#special-night-btn {
  color: #ffd700;
  text-shadow: 0 0 10px rgba(255, 215, 0, 0.8);
}

/* 恐怖脸闪烁效果 - 不再需要，改用背景图切换 */
.copyright {
  position: absolute;
  bottom: 2vh;
  left: 2vw;
  font-size: 1.2vw;
  color: #888;
  font-family: 'Courier New', monospace;
  z-index: 102;
}

.reset-hint {
  position: absolute;
  bottom: 2vh;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.8vw;
  color: #888;
  font-family: 'Courier New', monospace;
  z-index: 102;
}

.version {
  position: absolute;
  bottom: 2vh;
  right: 8vw;
  font-size: 1.8vw;
  color: #ccc;
  font-family: 'Courier New', monospace;
  z-index: 102;
  font-weight: bold;
}

/* 游戏结束 */
#game-over {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 100000;
  overflow: hidden;
}

/* 雪花视频背景 */
#game-over-static {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
  opacity: 0.8;
}

/* 游戏结束内容层 */
#game-over-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

#game-over h2 {
  font-size: 8vw;
  margin-bottom: 2vh;
  color: #ff0000;
  text-shadow:
    0 0 10px #ff0000,
    0 0 20px #ff0000,
    0 0 30px #ff0000,
    3px 3px 6px #000;
  font-weight: bold;
  letter-spacing: 0.1em;
}

#game-over-subtitle {
  font-size: 1.8vw;
  margin-bottom: 4vh;
  color: #ff0000;
  font-style: italic;
  text-align: center;
  padding: 0 2vw;
  text-shadow:
    0 0 5px #ff0000,
    0 0 10px #ff0000,
    2px 2px 4px #000;
  font-weight: bold;
}

#game-over button {
  width: 20vw;
  min-width: 200px;
  padding: 1.5vh 2vw;
  margin: 1vh 0;
  font-size: 1.5vw;
  background: #333;
  border: 2px solid #666;
  color: #fff;
  cursor: pointer;
  transition: all 0.3s;
}

#game-over button:hover {
  background: #555;
  border-color: #fff;
}

/* 游戏教程提示 */
#tutorial-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
}

#tutorial-content {
  background: rgba(30, 30, 30, 0.95);
  border: 3px solid #666;
  padding: 4vh 5vw;
  max-width: 60vw;
  text-align: center;
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.8);
}

#tutorial-content h2 {
  font-size: 3vw;
  margin-bottom: 3vh;
  color: #fff;
  text-shadow: 2px 2px 4px #000;
  letter-spacing: 0.1em;
}

#tutorial-content p {
  font-size: 1.4vw;
  line-height: 1.8;
  color: #ddd;
  margin-bottom: 3vh;
  text-align: left;
}

#tutorial-got-it {
  width: 15vw;
  min-width: 150px;
  padding: 1.5vh 3vw;
  font-size: 1.8vw;
  background: #555;
  border: 2px solid #888;
  color: #fff;
  cursor: pointer;
  transition: all 0.3s;
  font-weight: bold;
  letter-spacing: 0.2em;
}

#tutorial-got-it:hover {
  background: #777;
  border-color: #fff;
  transform: scale(1.05);
}

/* 隐藏类 */
.hidden {
  display: none !important;
}


/* 闪烁效果 */
@keyframes flicker {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.3;
  }
}

.flicker {
  animation: flicker 0.1s infinite;
}

/* 警告闪烁动画 */
@keyframes flash {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.3;
  }
}

/* 加载点动画 */
@keyframes loadingDots {

  0%,
  20% {
    content: '.';
  }

  40% {
    content: '..';
  }

  60%,
  100% {
    content: '...';
  }
}

.loading-dots {
  animation: loadingDots 1s infinite;
}

/* 过场动画 */
#cutscene {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  cursor: pointer;
  opacity: 0;
  transition: opacity 3s ease-in-out;
}

#cutscene.fade-in {
  opacity: 1;
}

#cutscene.fade-out {
  opacity: 0;
}

#cutscene img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.cutscene-hint {
  position: absolute;
  bottom: 5vh;
  left: 50%;
  transform: translateX(-50%);
  color: #fff;
  font-size: 1.5vw;
  font-family: 'Courier New', monospace;
  animation: pulse 1.5s infinite;
}

/* 每晚开始场景 */
#night-intro {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  transition: opacity 1.5s ease-in-out;
}

#night-intro.fade-in {
  opacity: 1;
}

#night-intro.fade-out {
  opacity: 0;
}

#night-intro-text {
  font-size: 8vw;
  color: #fff;
  font-family: 'Courier New', monospace;
  font-weight: bold;
  letter-spacing: 0.5vw;
  text-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
  z-index: 1;
}

/* 电眼闪烁动画 (Night 6) */
@keyframes lightning-flicker {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.85;
  }
}

@keyframes lightning-pulse {

  0%,
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
  }

  50% {
    transform: translate(-50%, -50%) scale(1.1);
    opacity: 0.9;
  }
}

@keyframes lightning-bolt {

  0%,
  100% {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(var(--rotation)) scaleY(0.5);
  }

  10%,
  20% {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(var(--rotation)) scaleY(1);
  }

  30% {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(var(--rotation)) scaleY(0.8);
  }
}

.lightning-eye-effect {
  animation: lightning-flicker 0.1s infinite;
}

/* Mobile Portrait */
@media (max-width: 768px) and (orientation: portrait) {

  /* Preloader mobile styles */
  .preloader-logo {
    font-size: 6vw;
  }

  .preloader-text {
    font-size: 3.5vw;
  }

  .preloader-percentage {
    font-size: 3vw;
  }

  /* Increase touch target sizes */
  .control-panel-button,
  .camera-button {
    min-width: 60px !important;
    min-height: 60px !important;
  }

  /* Adjust UI text sizes for mobile */
  #top-left-ui {
    top: 1vh;
    left: 2vw;
  }

  #time-display {
    font-size: 4vw;
  }

  #night-display {
    font-size: 3vw;
  }

  #bottom-right-ui {
    bottom: 1vh;
    right: 2vw;
  }

  #oxygen-display {
    font-size: 4vw;
  }

  .vent-icon {
    width: 5vw;
    height: 5vw;
  }

  /* Camera panel adjustments */
  #camera-panel {
    width: 90vw;
    height: 70vh;
    right: 5vw;
    top: 10vh;
  }

  #current-cam-label {
    font-size: 18px;
    top: 10px;
    left: 10px;
  }

  #camera-error-label {
    font-size: 36px;
    top: 10px;
    right: 15px;
  }

  #camera-grid {
    width: 40vw;
    max-width: none;
    bottom: 10px;
    left: 10px;
  }

  #play-sound-btn {
    width: 180px;
    padding: 10px 0;
    font-size: 14px;
    bottom: 15px;
    right: 15px;
    letter-spacing: 2px;
  }

  #shock-hawking-btn {
    width: 180px;
    padding: 10px 0;
    font-size: 14px;
    bottom: 70px;
    right: 15px;
    letter-spacing: 2px;
  }

  /* Control panel popup */
  #control-panel-popup {
    width: 85vw !important;
    left: 7.5vw !important;
    top: 15vh !important;
    min-height: 50vh !important;
    font-size: 3.5vw !important;
  }

  #control-panel-popup h3 {
    font-size: 4vw !important;
  }

  .control-row input {
    font-size: 3vw !important;
  }

  /* Main menu - 修复移动端按钮点击问题 */
  #main-menu {
    padding-left: 8%;
    padding-right: 8%;
    align-items: center;
  }

  #star-icon {
    width: 12vw;
    max-width: 60px;
    top: 10vh;
  }

  #star-icon-2 {
    width: 12vw;
    max-width: 60px;
    top: 18vh;
    /* 比第一颗低8vh */
  }

  #star-icon-3 {
    width: 12vw;
    max-width: 60px;
    top: 26vh;
    /* 比第二颗低8vh */
  }

  #main-menu h1 {
    font-size: 10vw;
    margin-bottom: 8vh;
    text-align: center;
    width: 100%;
  }

  #main-menu button {
    font-size: 5vw;
    width: 70vw;
    max-width: 400px;
    padding: 3vh 6vw;
    margin: 2vh 0;
    text-align: center;
    min-height: 60px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(255, 255, 255, 0.2);
    position: relative;
    z-index: 103;
  }

  #main-menu button::before {
    content: '';
    opacity: 0;
  }

  #main-menu button:hover::before,
  #main-menu button:focus::before {
    opacity: 0;
  }

  #main-menu button:active {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(0.98);
  }

  .copyright {
    font-size: 2.5vw;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    width: 90%;
  }

  .reset-hint {
    font-size: 2.5vw;
  }

  .version {
    font-size: 2.5vw;
  }

  /* Game over screen */
  #game-over h2 {
    font-size: 12vw;
  }

  #game-over-subtitle {
    font-size: 3.5vw;
  }

  #game-over button {
    font-size: 4vw;
    width: 60vw;
    padding: 2vh 4vw;
  }

  /* Tutorial */
  #tutorial-content {
    max-width: 85vw;
    padding: 3vh 4vw;
  }

  #tutorial-content h2 {
    font-size: 5vw;
  }

  #tutorial-content p {
    font-size: 3.5vw;
  }

  #tutorial-got-it {
    font-size: 4vw;
    width: 40vw;
    padding: 2vh 4vw;
  }

  /* Night intro */
  #night-intro-text {
    font-size: 12vw;
  }

  .cutscene-hint {
    font-size: 3.5vw;
  }
}

/* Mobile Landscape - 横屏优化 */
@media (max-width: 926px) and (orientation: landscape) {

  /* Preloader mobile styles */
  .preloader-logo {
    font-size: 4vh;
  }

  .preloader-text {
    font-size: 2vh;
  }

  .preloader-percentage {
    font-size: 2vh;
  }

  /* 横屏时增大摄像头按钮并确保可见 */
  #camera-btn {
    width: 70px !important;
    height: 60vh !important;
    min-width: 70px !important;
    min-height: 200px !important;
    background: rgba(0, 0, 0, 0.95) !important;
    border: 3px solid rgba(255, 255, 255, 0.7) !important;
    border-right: none !important;
    z-index: 25 !important;
    top: 30vh !important;
    transform: translateY(0) !important;
  }

  #camera-btn .camera-arrow {
    font-size: 20px !important;
  }

  #camera-btn div[style*="CAMERA"] {
    font-size: 14px !important;
  }

  /* UI adjustments for landscape */
  #top-left-ui {
    top: 1vh;
    left: 1vw;
  }

  #time-display {
    font-size: 3vh;
  }

  #night-display {
    font-size: 2vh;
  }

  #bottom-right-ui {
    bottom: 1vh;
    right: 1vw;
  }

  #oxygen-display {
    font-size: 3vh;
  }

  .vent-icon {
    width: 4vh;
    height: 4vh;
  }

  /* Camera panel - 横屏时不占满屏幕，留出右侧空间 */
  #camera-panel {
    width: calc(100vw - 70px);
    height: 100vh;
    right: 70px;
    top: 0;
    border: none;
    border-right: 3px solid #444;
  }

  #current-cam-label {
    font-size: 2.5vh;
    top: 1vh;
    left: 1vw;
  }

  #camera-error-label {
    font-size: 5vh;
    top: 1vh;
    right: 2vw;
  }

  /* Camera grid - 横屏时缩小并移到左下角 */
  #camera-grid {
    width: 25vw;
    max-width: 280px;
    bottom: 1vh;
    left: 1vw;
  }

  /* 横屏时调整按钮布局 */
  #play-sound-btn {
    width: 180px;
    padding: 2vh 0;
    font-size: 2.5vh;
    bottom: 2vh;
    right: 2vw;
    letter-spacing: 2px;
  }

  #shock-hawking-btn {
    width: 180px;
    padding: 2vh 0;
    font-size: 2.5vh;
    bottom: 10vh;
    right: 2vw;
    letter-spacing: 2px;
  }

  /* Main menu landscape */
  #main-menu {
    padding-left: 5%;
    align-items: flex-start;
  }

  #main-menu h1 {
    font-size: 6vh;
    margin-bottom: 3vh;
    text-align: left;
  }

  #main-menu button {
    font-size: 2.5vh;
    width: 30vw;
    min-width: 200px;
    padding: 1.5vh 3vw;
    margin: 1vh 0;
    min-height: 50px;
  }

  .copyright,
  .reset-hint,
  .version {
    font-size: 1.5vh;
  }

  /* Game over screen landscape */
  #game-over h2 {
    font-size: 8vh;
  }

  #game-over-subtitle {
    font-size: 2vh;
  }

  #game-over button {
    font-size: 2.5vh;
    width: 30vw;
    padding: 1.5vh 3vw;
    min-height: 50px;
  }

  /* Tutorial - 横屏时大幅缩小 */
  #tutorial-content {
    max-width: 70vw;
    max-height: 85vh;
    padding: 2vh 3vw;
    overflow-y: auto;
  }

  #tutorial-content h2 {
    font-size: 2.5vh;
    margin-bottom: 1.5vh;
  }

  #tutorial-content p {
    font-size: 1.6vh;
    line-height: 1.5;
    margin-bottom: 2vh;
  }

  #tutorial-got-it {
    font-size: 2vh;
    width: 20vw;
    min-width: 120px;
    padding: 1.5vh 3vw;
    min-height: 45px;
  }

  /* Night intro landscape */
  #night-intro-text {
    font-size: 8vh;
  }

  .cutscene-hint {
    font-size: 2vh;
  }

  /* Volume button landscape */
  #volume-btn {
    font-size: 2vh;
    padding: 1vh 2vw;
    top: 1vh;
    right: 1vw;
  }

  /* Volume panel landscape - 优化高度防止溢出 */
  #volume-panel {
    padding: 2vh 3vw;
    min-width: 300px;
    max-width: 70vw;
    max-height: 85vh;
  }

  #volume-panel h3 {
    font-size: 2vh;
    margin-bottom: 1.5vh;
  }

  .volume-item {
    margin-bottom: 1.5vh;
  }

  .volume-item label {
    font-size: 1.5vh;
    margin-bottom: 0.5vh;
  }

  .volume-percent {
    font-size: 1.5vh;
  }

  #close-volume-panel {
    font-size: 1.8vh;
    padding: 1vh;
    margin-top: 1.5vh;
  }
}

/* Prevent text selection on touch devices */
@media (hover: none) and (pointer: coarse) {
  * {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
  }

  input,
  textarea {
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
  }
}

/* Touch feedback */
@media (hover: none) and (pointer: coarse) {

  .hotspot:active,
  .control-panel-button:active,
  .camera-button:active,
  button:active {
    opacity: 0.7;
    transform: scale(0.95);
  }
}


/* ==================== Custom Night Menu ==================== */
#custom-night-menu {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #000000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 2vh;
}

#custom-night-menu h1 {
  font-size: 5vw;
  color: #fff;
  margin-bottom: 4vh;
  text-shadow: 0 0 20px rgba(255, 0, 0, 0.5);
}

.custom-night-controls {
  display: flex;
  flex-direction: column;
  gap: 3vh;
  width: 60%;
  max-width: 800px;
  margin-bottom: 4vh;
}

.ai-control {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(20, 20, 20, 0.8);
  padding: 2vh 3vw;
  border-radius: 10px;
  border: 2px solid rgba(100, 100, 100, 0.3);
  transition: all 0.3s;
}

.ai-control:hover {
  background: rgba(40, 40, 40, 0.9);
  border-color: rgba(150, 150, 150, 0.5);
}

.ai-name {
  font-size: 2vw;
  font-weight: bold;
  color: #fff;
  min-width: 150px;
}

.ai-slider-container {
  display: flex;
  align-items: center;
  gap: 1vw;
  flex: 1;
  margin: 0 2vw;
}

.ai-btn-minus,
.ai-btn-plus {
  width: 40px;
  height: 40px;
  font-size: 24px;
  font-weight: bold;
  background: rgba(50, 50, 50, 0.8);
  border: 2px solid rgba(100, 100, 100, 0.5);
  color: #fff;
  cursor: pointer;
  border-radius: 5px;
  transition: all 0.2s;
}

.ai-btn-minus:hover,
.ai-btn-plus:hover {
  background: rgba(80, 80, 80, 0.9);
  border-color: rgba(150, 150, 150, 0.7);
  transform: scale(1.1);
}

.ai-btn-minus:active,
.ai-btn-plus:active {
  transform: scale(0.95);
}

.ai-slider {
  flex: 1;
  height: 8px;
  -webkit-appearance: none;
  appearance: none;
  background: rgba(80, 80, 80, 0.6);
  border-radius: 5px;
  outline: none;
}

.ai-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  background: #ddd;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 10px rgba(200, 200, 200, 0.5);
  transition: all 0.2s;
}

.ai-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 15px rgba(220, 220, 220, 0.8);
}

.ai-slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  background: #ddd;
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: 0 0 10px rgba(200, 200, 200, 0.5);
  transition: all 0.2s;
}

.ai-slider::-moz-range-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 15px rgba(220, 220, 220, 0.8);
}

.ai-value {
  font-size: 2.5vw;
  font-weight: bold;
  color: #fff;
  min-width: 60px;
  text-align: center;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.custom-night-buttons {
  display: flex;
  gap: 2vw;
}

.custom-night-buttons button {
  padding: 1.5vh 3vw;
  font-size: 1.5vw;
  font-weight: bold;
  background: rgba(50, 50, 50, 0.8);
  border: 2px solid rgba(100, 100, 100, 0.5);
  color: #fff;
  cursor: pointer;
  border-radius: 5px;
  transition: all 0.3s;
  min-width: 150px;
}

.custom-night-buttons button:hover {
  background: rgba(80, 80, 80, 0.9);
  border-color: rgba(150, 150, 150, 0.7);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
}

.custom-night-buttons button:active {
  transform: translateY(0);
}

/* Mobile 适配 */
@media (max-width: 768px) {
  #custom-night-menu h1 {
    font-size: 8vw;
  }

  .custom-night-controls {
    width: 90%;
  }

  .ai-control {
    flex-direction: column;
    gap: 1vh;
    padding: 2vh;
  }

  .ai-name {
    font-size: 5vw;
    min-width: auto;
  }

  .ai-slider-container {
    width: 100%;
    margin: 0;
  }

  .ai-value {
    font-size: 6vw;
  }

  .custom-night-buttons {
    flex-direction: column;
    width: 80%;
  }

  .custom-night-buttons button {
    font-size: 4vw;
    width: 100%;
  }
}