:root {
    --primary: #4a9fd8;
    --secondary: #e7f4fc;
    --dark: #333;
    --light: #fff;
    --accent: #ffd700;
    --success: #4caf50;
    --warning: #ff9800;
    --danger: #f44336;
    --space-black: #121212;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Helvetica Neue', Arial, sans-serif;
}
html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    background-color: transparent;
    background-image: url('bgstar.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-position: center;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* 虚拟漫游视图 */
.virtual-tour-container {
    position: relative;
    width: 100%;
    height: 100vh;
    background-color: transparent;  /* 将黑色背景改为透明 */
    overflow: hidden;
}

.tour-view {
    width: 100%;
    height: 100%;
    position: relative;
    background-size: cover;
    background-position: center;
    transition: background-image 1s ease;
}

.hotspot {
    position: absolute;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 215, 0, 0.7);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--light);
    font-weight: bold;
    animation: pulse 2s infinite;
    transition: transform 0.3s ease;
    z-index: 10;
}

.hotspot:hover {
    transform: scale(1.2);
    background-color: var(--accent);
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(255, 215, 0, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(255, 215, 0, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(255, 215, 0, 0);
    }
}

.info-popup {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    max-width: 800px;
    background-color: rgba(0, 0, 0, 0.8);
    color: var(--light);
    padding: 20px;
    border-radius: 10px;
    z-index: 20;
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s ease;
    box-shadow: 0 0 15px rgba(74, 159, 216, 0.3);
}

.info-popup.active {
    opacity: 1;
    visibility: visible;
}

.info-popup h3 {
    color: var(--accent);
    margin-bottom: 10px;
    border-bottom: 1px solid rgba(255, 215, 0, 0.3);
    padding-bottom: 8px;
}

.info-popup p {
    margin-bottom: 15px;
    line-height: 1.7;
}

.info-popup .close-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: none;
    border: none;
    color: var(--light);
    font-size: 20px;
    cursor: pointer;
    transition: color 0.3s;
}

.info-popup .close-btn:hover {
    color: var(--accent);
}

/* 导航控制 */
.nav-controls {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 15;
}

.nav-btn {
    background-color: rgba(74, 159, 216, 0.7);
    color: var(--light);
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: bold;
}

.nav-btn:hover {
    background-color: var(--primary);
    transform: scale(1.05);
}

.nav-btn:active {
    transform: scale(0.98);
}

/* 界面覆盖层 */
.interface-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
}

.overlay-element {
    position: absolute;
    pointer-events: auto;
}

.module-selector {
    top: 20px;
    right: 20px;
    background-color: rgba(0, 0, 0, 0.7);
    color: var(--light);
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

.module-selector h4 {
    margin-bottom: 10px;
    color: var(--accent);
}

.module-btn {
    background: none;
    border: 1px solid var(--primary);
    color: var(--light);
    padding: 8px 12px;
    margin: 5px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: block;
    width: 100%;
}

.module-btn:hover, .module-btn.active {
    background-color: var(--primary);
    transform: translateX(5px);
}

.info-panel {
    bottom: 20px;
    left: 20px;
    width: 300px;
    background-color: rgba(0, 0, 0, 0.7);
    color: var(--light);
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

.info-panel h4 {
    color: var(--accent);
    margin-bottom: 8px;
}

/* 启动屏幕 */
.launch-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--space-black);  /* 保持封面的黑色背景 */
    color: var(--light);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 50;
    transition: opacity 1s ease;
    background-size: cover;
}


.launch-screen h1 {
    font-size: 3.5rem;
    color: var(--accent);
    margin-bottom: 20px;
    text-align: center;
    text-shadow: 0 0 15px rgba(255, 215, 0, 0.5);
    letter-spacing: 3px;
}

.launch-screen p {
    font-size: 1.2rem;
    max-width: 600px;
    text-align: center;
    margin-bottom: 30px;
    line-height: 1.8;
}

.start-btn {
    background-color: var(--primary);
    color: var(--light);
    border: none;
    padding: 15px 30px;
    font-size: 1.2rem;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: bold;
    letter-spacing: 1px;
    box-shadow: 0 0 15px rgba(74, 159, 216, 0.5);
}

.start-btn:hover {
    background-color: #2580b3;
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(74, 159, 216, 0.7);
}

.loading-animation {
    width: 100px;
    height: 100px;
    border: 5px solid rgba(74, 159, 216, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 1s ease-in-out infinite;
    margin-bottom: 30px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 全景导航 */
.panorama-nav {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 15;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 10px 15px;
    border-radius: 25px;
}

.pano-dot {
    width: 12px;
    height: 12px;
    background-color: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.pano-dot.active {
    background-color: var(--accent);
    transform: scale(1.2);
    box-shadow: 0 0 5px var(--accent);
}

/* 工具控制面板 */
.tour-controls {
    position: absolute;
    top: 20px;
    left: 20px;
    background-color: rgba(0, 0, 0, 0.7);
    padding: 15px;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

.tour-controls .nav-btn {
    width: 150px;
    text-align: left;
    padding-left: 15px;
    position: relative;
}

.tour-controls .nav-btn:before {
    content: '>';
    position: absolute;
    right: 15px;
}

/* 版权信息 */
.copyright {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    color: rgba(255, 255, 255, 0.7);
    text-align: center;
    padding: 5px 0;
    font-size: 0.8rem;
    z-index: 5;
}

.copyright a {
    color: var(--primary);
    text-decoration: none;
}

.copyright a:hover {
    text-decoration: underline;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .info-popup {
        width: 90%;
        bottom: 80px;
    }
    
    .module-selector {
        top: 10px;
        right: 10px;
        padding: 10px;
    }
    
    .info-panel {
        width: 250px;
        left: 10px;
        bottom: 10px;
    }
    
    .launch-screen h1 {
        font-size: 2.5rem;
    }
    
    .launch-screen p {
        font-size: 1rem;
        padding: 0 20px;
    }
    
    .tour-controls {
        padding: 10px;
    }
    
    .tour-controls .nav-btn {
        width: 120px;
        font-size: 0.9rem;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInRight {
    from { transform: translateX(100px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideInLeft {
    from { transform: translateX(-100px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* 应用动画 */
.module-selector {
    animation: slideInRight 0.5s ease-out;
}

.info-panel {
    animation: slideInLeft 0.5s ease-out;
}

.hotspot {
    animation: fadeIn 0.5s ease-out, pulse 2s infinite;
}

/* 辅助类 */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}
/* 新增跳过视频按钮样式 */
.skip-video-btn {
    position: absolute; /* 绝对定位 */
    top: 20px; /* 距离页面顶部20px */
    right: 20px; /* 距离页面右边20px */
    padding: 10px 20px; /* 内边距 */
    font-size: 16px; /* 字体大小 */
    background-color: rgba(0, 0, 0, 0.7); /* 背景颜色 */
    color: var(--light); /* 字体颜色 */
    border: none; /* 无边框 */
    border-radius: 25px; /* 圆角 */
    cursor: pointer; /* 鼠标悬停时显示手形光标 */
    transition: background-color 0.3s ease; /* 添加渐变过渡效果 */
    z-index: 30; /* 确保按钮在最上层 */
}

.skip-video-btn:hover {
    background-color: var(--accent); /* 悬停时的背景颜色 */
    transform: scale(1.1); /* 悬停时按钮放大 */
}

.skip-video-btn:active {
    transform: scale(0.98); /* 按钮点击时缩小 */
}

/* 现有的 intro-video-container 样式保持不变 */
.intro-video-container {
    position: relative;
    width: 100%;
    height: 100vh;
    background-color: var(--space-black);
    overflow: hidden;
}

/* 弹窗内按钮居中样式 */
.info-popup button {
    display: block;
    margin: 0 auto;
    text-align: center;
}
.module {
    position: absolute;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: transparent;
  }
  
  /* 每个模块的热点区域 */
  .module::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;  /* 初始透明度为 0 */
    transition: opacity 0.3s ease-in-out;  /* 淡入效果 */
    pointer-events: none;
    z-index: 2;  /* 确保高亮图层显示在模块上面 */
  }
  
  /* 定义每个模块的高亮图片 */
  .module.wentian::after {
    background-image: url('wentian.png');
  }
  
  .module.shenzhou::after {
    background-image: url('shenzhou.png');
  }
  
  .module.tianhe::after {
    background-image: url('tianhe.png');
  }
  
  .module.tianzhou::after {
    background-image: url('tianzhou.png');
  }
  
  .module.mengtian::after {
    background-image: url('mengtian.png');
  }
  
  /* Hover 时图片淡入 */
  .module:hover::after {
    opacity: 1;  /* Hover 后逐渐显示图片 */
  }
  .top-nav {
    position: absolute;
    top: 10px;
    left: 10px;
    z-index: 9999;
    display: flex;
    gap: 10px;
}

.top-nav button {
    padding: 6px 12px;
    background-color: rgba(0, 0, 0, 0.7);
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
}

.top-nav button:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

#helpPopup {
    display: none;
}

#helpPopup.active {
    display: block;
}