:root {
    --primary-color: #2196F3;
    --panel-bg: rgba(255,255,255,0.85);
    --border-radius: 8px;
    --shadow: 0 8px 32px rgba(0,0,0,0.1);
    --header-gradient: linear-gradient(135deg, #2196F3, #21CBF3);
}

body {
    margin: 0;
    overflow: hidden;
    font-family: 'Segoe UI', system-ui;
    background: linear-gradient(135deg, #f5f7fa, #e4edf9);
    min-height: 100vh;
}

body.en #main-toolbar {
    width: 300px;
}

        /* 左侧主工具栏 */
        #main-toolbar {
            position: absolute;
            left: 10px;
            top: 20px;
            width: 260px;
            background: var(--panel-bg);
            backdrop-filter: blur(10px);
            border-radius: 8px;
            box-shadow: var(--shadow);
            padding: 0;
            z-index: 100;
            max-height: 95vh;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

/* Logo和标题区域 */
.toolbar-header {
    background: var(--header-gradient);
    padding: 15px 20px;
    display: flex;
    align-items: center;
    color: white;
    margin-bottom: 10px;
    flex-shrink: 0;
}

.logo-container {
    
    height: 50px;
    width:100%;
    display: flex;
    align-items:start;
    justify-content: center;
    margin-right: 15px;
   
}

.logo {
    font-size: 28px;
    color: var(--primary-color);
    font-weight: bold;
    background-image:url(../../images/logo.png);
}

.header-text {
    flex: 1;
}

.app-title {
    margin: 0;
    font-size: 1.4em;
    font-weight: 600;
    letter-spacing: 1px;
}

.app-subtitle {
    margin: 3px 0 0;
    font-size: 0.85em;
    opacity: 0.9;
}
        .tool-section {
            margin: 15px 0;
            padding: 10px 20px;
            border-bottom: 1px solid rgba(0,0,0,0.1);
        }

.tool-section-title {
    font-weight: 600;
    color: #666;
    margin-bottom: 12px;
    padding-left: 8px;
    display: flex;
    align-items: center;
}
    .tool-section-title i {
        margin-right: 8px;
        color: var(--primary-color);
    }
        /* 模式切换按钮组 */
        .mode-switcher {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 6px;
            margin-bottom: 15px;
        }
.tool-item {
    -webkit-user-drag: element; /* 允许元素拖动 */
    user-select: none; /* 禁止文字选中 */
    aspect-ratio: 1;
    background: white;
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 6px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: grab;
    transition: all 0.2s;
    position: relative;
    font-size:12px;
}

            .tool-item:hover {
                border-color: var(--primary-color);
                box-shadow: 0 2px 8px rgba(33,150,243,0.1);
            }


    .tool-item img {
        -webkit-user-drag: none; /* 禁止图片拖动 */
        pointer-events: none; /* 禁用图片的鼠标事件 */
    }
#properties-panel {
    position: absolute;
    right: 20px;
    top: 20px;
    width: 280px;
    background: var(--panel-bg);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 16px;
    z-index: 100;
}

.mode-btn {
    padding: 10px;
    border: none;
    background: rgba(0,0,0,0.05);
    cursor: pointer;
    transition: all 0.2s;
    border-radius: 4px;
    border-radius: 4px;
    font-weight: 500;
}

            .mode-btn.selected-mode {
                background: var(--primary-color);
                color: white;
                box-shadow: 0 2px 6px rgba(33,150,243,0.4);
            }
        /* 几何体创建工具项 */
        .tool-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 8px;
        }
        /* 右侧属性面板 */
        #properties-panel {
            position: absolute;
            right: 20px;
            top: 20px;
            width: 280px;
            background: var(--panel-bg);
            backdrop-filter: blur(10px);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 16px;
            z-index: 100;
        }

        .property-group {
            margin: 12px 0;
        }

        .property-row {
            display: flex;
            align-items: center;
            margin: 8px 0;
        }

        .property-label {
            width: 80px;
            color: #666;
            font-size: 0.9em;
        }

        /* 底部信息面板 */
        #info-panel {
            position: absolute;
            right: 20px;
            bottom: 20px;
            width: 280px;
            max-height: 40vh;
            background: var(--panel-bg);
            backdrop-filter: blur(10px);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 16px;
            overflow-y: auto; /* 垂直溢出时显示滚动条 */
            overflow-x: hidden; /* 隐藏水平滚动条 */
            scrollbar-width: thin; /* 滚动条细型样式 */
            scrollbar-color: var(--primary-color) rgba(0,0,0,0.1); /* 滚动条颜色 */
        }

        /* 组合控制栏 */
        #group-controls {
            position: absolute;
            left: 50%;
            bottom: 20px;
            transform: translateX(-50%);
            display: flex;
            gap: 8px;
            padding: 10px;
            background: var(--panel-bg);
            backdrop-filter: blur(10px);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }

.group-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 20px;
    background: rgba(0,0,0,0.08);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

            .group-btn:hover {
                background: var(--primary-color);
                color: white;
            }

        /* 标签样式优化 */
.custom-label {
    background: rgba(255,255,255,0.9);
    border: 1px solid rgba(0,0,0,0.1);
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    color: #333;
    font-size: 0.9em;
}

        .scene-item {
            padding: 8px;
            margin: 4px;
            background: rgba(255,255,255,0.9);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

            .scene-item.selected {
                background: #a0c0ff;
            }

        .visibility-toggle {
            cursor: pointer;
            margin-left: 10px;
        }

        .custom-label {
            background: rgba(0,0,0,0.7);
            color: black;
            padding: 8px;
            border-radius: 4px;
            pointer-events: auto;
            transition: all 0.3s;
            cursor: pointer;
        }

            .custom-label:hover {
                background: rgba(0,0,0,0.9);
                transform: scale(1.05);
            }

        #sector-config-modal {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            opacity: 0;
            transform: translate(-50%, -50%) scale(0.9);
        }

            #sector-config-modal[style*="display: block"] {
                opacity: 1;
                transform: translate(-50%, -50%) scale(1);
            }

        #pyramid-config-modal {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            opacity: 1;
            transform: translate(-50%, -50%) scale(0.9);
        }


            #pyramid-config-modal[style*="display:block"] {
                opacity: 1;
                transform: translate(-50%, -50%) scale(1);
            }



        /* PNG图标基础样式 */
        .tool-icon {
            width: 32px;
            height: 32px;
        }
/* 添加帮助导航样式 */
.help-nav {
    position: fixed;
    left: 15px;
    bottom: 15px;
    background: rgba(255, 255, 255, 0.9);
    padding: 10px;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    font-size: 13px;
}

    .help-nav a {
        display: inline-flex;
        align-items: center;
        padding: 5px 10px;
        margin-right: 8px;
        color: #333;
        text-decoration: none;
        border-radius: 4px;
        transition: all 0.3s ease;
        background: #f8f9fa;
        border: 1px solid #dee2e6;
    }

        .help-nav a:hover {
            background: #e9ecef;
            color: #007bff;
            transform: translateY(-2px);
        }

    .help-nav i {
        margin-right: 6px;
        font-size: 14px;
    }

    .help-nav a:last-child {
        margin-right: 0;
    }


#transform-toolbar {
    position: fixed;
    top: 200px;
    right: 20px;
    width: 250px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
}

    #transform-toolbar .tool-section {
        padding: 12px;
    }

    #transform-toolbar .tool-section-title {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        font-weight: bold;
        color: #333;
        margin-bottom: 12px;
        padding-left: 5px;
    }

        #transform-toolbar .tool-section-title i {
            font-size: 16px;
            color: #666;
            padding: 0 5px;
        }

.transform-controls {
    display: flex;
    gap: 8px;
}

.transform-mode-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background: white;
    color: #666;
    cursor: pointer;
    transition: all 0.2s ease;
}

    .transform-mode-btn:hover {
        background: #f5f5f5;
        border-color: #ccc;
    }

    .transform-mode-btn.active {
        background: #4CAF50;
        border-color: #4CAF50;
        color: white;
    }

    .transform-mode-btn i {
        font-size: 14px;
    }

    .transform-mode-btn span {
        font-size: 13px;
    }
.tool-item span {
    max-width: 80px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
/* 核心Flex布局 */
.inline-group {
    display: flex; /* 启用Flex布局 */
    align-items: center; /* 垂直居中对齐 */
    gap: 10px; /* 元素间距 */
}

/* 语言选择器自适应 */
.language-selector {
    flex: 1; /* 占据剩余空间 */
    min-width: 80px; /* 最小宽度避免挤压 */
    padding: 2px 2px; /* 内边距优化点击区域 */
}
#logo-container {
    position: relative; /* 创建相对定位容器 */
    display: inline-block; /* 避免破坏布局流 */
}

#language-switcher {
    position: absolute;
    bottom: 5px; /* 距离Logo底部5px */
    right: 5px; /* 距离Logo右侧5px */
    z-index: 10; /* 确保悬浮于Logo上方 */
}

#language-selector {
    background: rgba(255,255,255,0.7); /* 半透明白底增强可读性 */
    border: 1px solid #ddd;
    border-radius: 3px;
    padding: 3px 6px;
    font-size: 12px; /* 小字体避免遮挡Logo */
}

/* 公式输入样式 */
.formula-input-container {
    padding: 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    margin-top: 10px;
}

.formula-type-selector {
    margin-bottom: 10px;
    display: flex;
    gap: 15px;
}

.formula-type-selector label {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    font-size: 14px;
}

.formula-type-selector input[type="radio"] {
    margin: 0;
}

.formula-inputs {
    margin-bottom: 10px;
}

.formula-input {
    width: 100%;
    padding: 8px;
    margin-bottom: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 14px;
    background: white;
    color: #333;
}

.formula-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 10px;
}

.range-input {
    padding: 6px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 12px;
    background: white;
    color: #333;
}

.formula-btn {
    width: 100%;
    padding: 10px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    transition: background 0.3s;
}

.formula-btn:hover {
    background: #45a049;
}

.formula-btn:active {
    background: #3d8b40;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .formula-controls {
        grid-template-columns: 1fr;
    }
    
    .formula-type-selector {
        flex-direction: column;
        gap: 8px;
    }
}

/* 可滚动工具区域 */
.scrollable-tool-section {
    max-height: 60vh;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 5px;
    margin-bottom: 10px;
}

.scrollable-tool-section::-webkit-scrollbar {
    width: 6px;
}

.scrollable-tool-section::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

.scrollable-tool-section::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
}

.scrollable-tool-section::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* 调整工具栏头部固定 */
.toolbar-header {
    flex-shrink: 0;
}

/* 调整语言选择器固定 */
.tool-section:first-of-type {
    flex-shrink: 0;
}

/* 调整编辑模式固定 */
.tool-section:nth-of-type(2) {
    flex-shrink: 0;
    margin-top: 0;
}

/* 参考背景图功能样式 */
.background-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.background-btn {
    padding: 8px 12px;
    border: 1px solid rgba(0,0,0,0.1);
    background: white;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9em;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.background-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.background-btn i {
    font-size: 0.8em;
}

.background-options {
    background: rgba(0,0,0,0.02);
    border-radius: 4px;
    padding: 10px;
    margin-top: 8px;
}

.background-options .property-row {
    margin: 6px 0;
}

.background-options .property-label {
    font-size: 0.8em;
    width: 60px;
}
#loading-overlay {
  position: fixed;
  z-index: 9999;
  left: 0; top: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,0.95);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: opacity 0.4s;
}
.loading-spinner {
  border: 6px solid #eee;
  border-top: 6px solid #2196f3;
  border-radius: 50%;
  width: 60px; height: 60px;
  animation: spin 1s linear infinite;
  margin-bottom: 16px;
}
@keyframes spin {
  0% { transform: rotate(0deg);}
  100% { transform: rotate(360deg);}
}
.loading-text {
  font-size: 18px;
  color: #2196f3;
  letter-spacing: 2px;
}
.loading-logo {
  width: 80px;
  height: 80px;
  margin-bottom: 18px;
  border-radius: 16px;
  box-shadow: 0 2px 12px rgba(33,150,243,0.12);
  background: white;
  object-fit: contain;
}
.loading-progress-bar {
  width: 220px;
  height: 10px;
  background: #e3eaf2;
  border-radius: 5px;
  margin-top: 24px;
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(33,150,243,0.08);
}
.loading-progress-inner {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #2196f3, #21cbf3);
  border-radius: 5px;
  transition: width 0.3s;
}