/* ============================================
   OPM 图元样式统一管理文件
   ============================================ */

/* CSS变量定义 - 移除本地:root定义，使用css-variables.css中的主题变量 */
/* 所有OPM相关的CSS变量现在在css-variables.css中统一管理，支持主题切换 */

/* ============================================
   OPM图元基础样式
   ============================================ */

/* 所有OPM图元的通用样式 */
.opm-element {
    position: absolute;
    padding: 6px 12px; 
    cursor: move;
    user-select: none;
    text-align: center;
    font-weight: var(--font-weight-bold);
    font-family: var(--app-font-family);
    font-size: var(--font-size-base);
    border-width: var(--opm-border-width);
    border-style: solid;
    background-color: var(--opm-element-bg);
    transition: background-color var(--opm-transition-fast), border-color var(--opm-transition-fast); /* 添加背景和边框颜色过渡 */
    
    box-sizing: border-box;
    z-index: 2; /* 图元基础层级 */
    --opm-element-border-color: currentColor;
    --opm-element-stripe-color: var(--opm-element-border-color);
    --opm-indicator-z-index: 200; /* 保证脚本/API标签浮在连线之上 */
    border-color: var(--opm-element-border-color);
    /* 移除最小尺寸约束，允许元素自由缩放 */
    /* min-width: 40px; */
    /* min-height: 24px; */
}

/* 图元具有子视图时，边框加粗（对象/过程） */
.opm-element.opm-object.has-subview,
.opm-element.opm-process.has-subview {
    /* 默认边框宽度加倍；保持原有边框颜色与形状 */
    border-width: calc(var(--opm-border-width) * 2) !important;
}

/* 编辑态高亮 */
.opm-element.title-editing {
    cursor: text !important;
    box-shadow: inset 0 0 0 calc(2px / var(--current-scale, 1)) var(--color-primary, #2563eb);
    transition: box-shadow var(--opm-transition-fast);
}

.element-title-editor-node {
    cursor: text !important;
    outline: none !important;
    white-space: pre-wrap !important;
    word-break: break-word;
    text-align: center;
}

.element-title-editor-node::selection {
    background: var(--color-primary, #2563eb);
    color: #ffffff;
}


/* 图元标题文本样式 */
.opm-element span {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-family: var(--app-font-family);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    letter-spacing: 0.5px;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
    padding: 0;
    background: transparent;
    border: none;
    outline: none;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
    z-index: 1;
    color: inherit;
    white-space: pre-line;
    overflow-wrap: anywhere;
    word-break: break-word;
    pointer-events: none;
}

.opm-element .semantic-title-stack {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    width: 100%;
    height: auto;
    position: relative;
    z-index: 1;
}

.opm-element .semantic-title-stack > span,
.opm-element .semantic-title-stack > .element-text {
    width: 100%;
    height: auto;
    min-height: 0;
}

.opm-element .domain-type-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    max-width: 100%;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 10px;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: 0.2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: currentColor;
    background: transparent;
    border: 1px solid color-mix(in srgb, currentColor 18%, transparent);
    pointer-events: none;
}

.opm-element.opm-object .domain-type-badge {
    color: color-mix(in srgb, var(--opm-object-color) 78%, #000 22%);
    border-color: color-mix(in srgb, var(--opm-object-color) 18%, transparent);
}

.opm-element.opm-process .domain-type-badge {
    color: color-mix(in srgb, var(--opm-process-color) 78%, #000 22%);
    border-color: color-mix(in srgb, var(--opm-process-color) 18%, transparent);
}

/* 分组元素的span样式覆盖 - 不使用flex居中 */
.opm-element.opm-group span {
    display: inline-block !important;
    justify-content: flex-start !important;
    text-align: left !important;
    width: auto !important;
    height: auto !important;
}

.opm-element.in-group:not(.opm-group) {
    box-shadow: none;
}

/* ============================================
   OPM对象样式
   ============================================ */

/* 对象基础样式 - 无界版本 */
.opm-element.opm-object {
    --opm-element-border-color: var(--opm-object-color);
    border-color: var(--opm-element-border-color) !important;
    color: var(--opm-object-color) !important;
    border-radius: 0px !important; /* 矩形形状 */
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    flex-direction:column !important;
    /* 与过程图元一致的内边距 */
    padding: 8px 25px !important;
    box-sizing: border-box !important;
    position: relative;
    /* 默认限制宽度：无状态时用于长标题自动换行 */
    max-width: var(--opm-element-max-width, 240px);
}

/* 有状态时取消上限，避免状态数量/宽度较大时溢出对象边框 */
.opm-element.opm-object:has(.opm-object-state) {
    max-width: none;
}

.opm-element.opm-object::before,
.opm-element.opm-process::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    z-index: 0;
    background-image:
        repeating-linear-gradient(
            to right,
            var(--opm-element-stripe-color) 0,
            var(--opm-element-stripe-color) calc(1px / var(--current-scale, 1)),
            transparent calc(1px / var(--current-scale, 1)),
            transparent calc(12px / var(--current-scale, 1))
        ),
        repeating-linear-gradient(
            to bottom,
            var(--opm-element-stripe-color) 0,
            var(--opm-element-stripe-color) calc(1px / var(--current-scale, 1)),
            transparent calc(1px / var(--current-scale, 1)),
            transparent calc(12px / var(--current-scale, 1))
        );
    opacity: 0.35;
}

/* 水平布局 - 增强优先级 */
.opm-element.opm-object.horizontal-layout {
    flex-direction: row !important;
    flex-wrap: nowrap !important; /* 强制单行 */
    gap: var(--opm-object-gap, 2px) !important;
    align-items: center !important;
    justify-content: center !important; /* 居中显示状态元素（当标题更宽时，状态居中对齐） */
    position: relative; /* 让标题绝对定位相对于对象容器 */
}

/* 水平布局：对象有状态时，标题和状态垂直堆叠，状态在标题下方 */
.opm-element.opm-object.horizontal-layout:has(.opm-object-state) {
    flex-direction: column !important; /* 标题和状态垂直堆叠 */
    align-items: center !important; /* 标题和状态容器水平居中 */
    justify-content: flex-start !important; /* 标题和状态从顶部开始排列 */
    padding-top: var(--opm-object-title-gap, 10px) !important; /* 调整顶部内边距 */
}

/* 有状态时：标题回归文流，不进行绝对定位 */
.opm-element.opm-object.horizontal-layout:has(.opm-object-state) > span {
    position: static;
    transform: none;
    display: block !important; /* 确保标题独占一行 */
    width: auto !important;
    white-space: nowrap; /* 标题自己不换行 */
    margin-bottom: var(--opm-object-title-gap, 10px); /* 标题下方留出间距 */
}

/* 无状态时：标题回归文流，垂直居中显示 */
.opm-element.opm-object.horizontal-layout:not(:has(.opm-object-state)) > span {
    position: static;
    transform: none;
    display: block !important;
    width: auto !important;
    white-space: nowrap; /* 防止新建时标题换行（无状态时） */
}

/* 布局更新时的过渡动画 */
.opm-element.opm-object.layout-updated {
    transition: min-width 0.2s ease, padding 0.2s ease;
}

/* 对象状态元素样式 */
.opm-object-state {
    position: relative !important;
    padding: 6px 10px; /* 增加内边距 */
    border: var(--opm-border-width) solid var(--opm-object-state-color) !important;
    border-radius: 6px;
    /* 修复变量名笔误：--omp- -> --opm- */
    color: var(--opm-object-state-color) !important;
    background-color: var(--opm-element-bg);
    font-size: var(--font-size-sm); /* 进一步增大状态字体大小，与导出图片保持一致 */
    font-family: var(--app-font-family);
    text-align: center;
    white-space: nowrap;
    cursor: pointer;
    flex-shrink: 0 !important; /* 防止在flex布局中被压缩 */
    flex-grow: 0 !important; /* 防止在flex布局中被拉伸 */
    width: auto !important; /* 基于内容大小 */
    margin: 5px 2px;
    line-height: var(--line-height-normal);
    letter-spacing: 0.5px;
    /* 移除状态元素最小尺寸约束 */
    /* min-width: 40px !important; */
    /* min-height: 15px !important; */
    max-width: none; /* 允许根据内容扩展 */
    box-sizing: border-box; /* 确保padding和border包含在宽度内 */
    /* 状态操作过渡动画 */
    transition: all var(--opm-transition-normal),
                opacity var(--opm-transition-fast),
                background-color var(--opm-transition-fast),
                border-color var(--opm-transition-fast),
                color var(--opm-transition-fast);
    margin: 5px 2px 5px 2px !important; /* 只保留左侧微小间距，去除右侧空白 */
    box-sizing: border-box !important;
    z-index: 15 !important; /* 确保状态图元在所有基础图元之上，便于点击选中和右键操作 */
    pointer-events: auto !important; /* 确保状态图元可以接收鼠标事件 */
}

/* 确保水平布局下，状态图元容器内的状态元素水平排列 */
.opm-element.opm-object.horizontal-layout .opm-object-states-container {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap; /* 强制状态图元单行排列 */
    gap: var(--opm-object-gap, 2px);
    justify-content: center;
    align-items: center;
    width: 100%; /* 占据可用宽度 */
}

.opm-element.opm-object.states-collapsed .opm-object-states-container {
    display: none !important;
}

.opm-element.opm-object .opm-object-states-indicator {
    position: absolute;
    top: -8px;
    right: -8px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: 999px;
    border: 1px solid var(--opm-object-color);
    background: var(--opm-element-bg);
    color: var(--opm-object-color);
    font-size: 11px;
    font-weight: 700;
    line-height: 16px;
    text-align: center;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.18);
    pointer-events: none;
    z-index: 18;
}

/* 对象状态悬停效果 */
.opm-object-state:hover {
    background-color: var(--opm-element-bg-hover);
    border-color: var(--opm-object-state-color);
    color: var(--opm-object-state-color);
    box-shadow: none;
}


/* ============================================
   OPM过程样式
   ============================================ */

.opm-element.opm-process {
    background-color: var(--opm-element-bg) ;
    --opm-element-border-color: var(--opm-process-color);
    border-color: var(--opm-element-border-color) !important;
    color: var(--opm-process-color) !important;
    border-radius: 50%;
    text-align: center ;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px 25px; 
    position: relative; /* 添加相对定位以支持绝对定位的子元素 */
    max-width: var(--opm-element-max-width, 240px);
}

/* 过程图元的文本居中 */
.opm-element.opm-process span {
    text-align: center !important;
    width: 100% !important;
}

.opm-element.opm-object.horizontal-layout:has(.semantic-title-stack):has(.opm-object-state) > .semantic-title-stack {
    position: static;
    transform: none;
    display: flex !important;
    width: auto !important;
    margin-bottom: var(--opm-object-title-gap, 10px);
}

.opm-element.opm-object.horizontal-layout:not(:has(.opm-object-state)) > .semantic-title-stack {
    position: static;
    transform: none;
    display: flex !important;
    width: auto !important;
}

/* 脚本标记 - 通用样式 */
.opm-element .script-indicator {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #4CAF50;
    color: var(--color-text-inverse);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    padding: 2px 4px;
    border-radius: 3px;
    line-height: var(--line-height-none);
    z-index: var(--opm-indicator-z-index, 200);
    font-family: var(--app-font-family);
    box-shadow: none;
    border: none;
}

.opm-element .script-indicator.script-indicator--js {
    background: #4CAF50; /* JavaScript -> 绿色 */
}

.opm-element .script-indicator.script-indicator--ts {
    background: #00897B; /* TypeScript -> 青绿色 */
}

.opm-element .script-indicator.script-indicator--cpp {
    background: #1976D2; /* C++ -> 蓝色 */
}

.opm-element .script-indicator.script-indicator--custom {
    background: #607D8B; /* 其他语言 -> 中性色 */
}

/* API标记 - 通用样式 */
.opm-element .api-indicator {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #FF9800;
    color: var(--color-text-inverse);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    padding: 2px 4px;
    border-radius: 3px;
    line-height: var(--line-height-none);
    z-index: var(--opm-indicator-z-index, 200);
    font-family: var(--app-font-family);
    box-shadow: none;
    border: none;
    cursor: help;
}

/* 对象API标记 */
.opm-element.opm-object .api-indicator {
    background: #2196F3; /* 蓝色表示条件API */
}

/* 过程API标记 */
.opm-element.opm-process .api-indicator {
    background: #9C27B0; /* 紫色表示动作API */
}

/* 状态API标记 */
.opm-element.opm-object-state .api-indicator {
    background: #2196F3; /* 蓝色表示条件API */
}

/* LLM标记 */
.canvas-area[data-scale-level="small"] .opm-element::before {
    opacity: 0.35;
}

.canvas-area[data-scale-level="small"] .opm-element .script-indicator,
.canvas-area[data-scale-level="small"] .opm-element .api-indicator {
    display: flex !important;
    transform: scale(0.75);
    transform-origin: top right;
    opacity: 0.9;
}

.canvas-area[data-scale-level="small"] #link-svg-layer text:not(.opm-link-label):not(.opm-link-modifier) {
    display: none;
}

.canvas-area[data-scale-level="small"] .opm-link-label,
.canvas-area[data-scale-level="small"] .opm-link-modifier {
    display: block !important;
    opacity: 0.8 !important;
}
.opm-element .llm-indicator {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #00838F;
    color: var(--color-text-inverse);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    padding: 2px 4px;
    border-radius: 3px;
    line-height: var(--line-height-none);
    z-index: var(--opm-indicator-z-index, 200);
    font-family: var(--app-font-family);
    cursor: help;
}

.opm-element.opm-process .llm-indicator {
    background: #006064;
}

.opm-element.opm-object .llm-indicator {
    background: #0097A7;
}

/* MCP标记 */
.opm-element .mcp-indicator {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #EF6C00;
    color: var(--color-text-inverse);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    padding: 2px 4px;
    border-radius: 3px;
    line-height: var(--line-height-none);
    z-index: var(--opm-indicator-z-index, 200);
    font-family: var(--app-font-family);
    cursor: help;
}

.opm-element.opm-process .mcp-indicator {
    background: #FB8C00;
}

/* Markdown 文档标记 */
.opm-element .doc-indicator {
    position: absolute;
    right: -6px;
    bottom: -6px;
    background: #2e7d32;
    color: var(--color-text-inverse, #ffffff);
    font-size: 10px;
    font-weight: var(--font-weight-bold);
    padding: 2px 5px;
    border-radius: 4px;
    line-height: 1;
    z-index: var(--opm-indicator-z-index, 200);
    font-family: var(--app-font-family);
    border: 1px solid rgba(255, 255, 255, 0.92);
    box-shadow: none;
    pointer-events: none;
    letter-spacing: 0.02em;
}

.opm-element.opm-process .doc-indicator {
    background: #1b5e20;
}

.canvas-area[data-scale-level="small"] .opm-element .llm-indicator,
.canvas-area[data-scale-level="small"] .opm-element .mcp-indicator,
.canvas-area[data-scale-level="small"] .opm-element .doc-indicator {
    display: flex !important;
    transform: scale(0.75);
    transform-origin: bottom right;
    opacity: 0.9;
}

/* ============================================
   图元交互状态样式
   ============================================ */

/* 选中状态 */
.opm-element.selected:not(.opm-group) {
    outline: var(--opm-selected-width) dashed var(--opm-selected-color);
    outline-offset: var(--opm-selected-offset);
    z-index: 10 !important; /* 确保选中的基础图元有较高的层级，但低于状态图元 */
}

.opm-element.opm-group.selected {
    outline: var(--opm-selected-width) dashed var(--opm-selected-color);
    outline-offset: var(--opm-selected-offset);
}

/* 状态图元选中状态 */
.opm-object-state.selected {
    outline: var(--opm-selected-width) dashed var(--opm-selected-color);
    outline-offset: var(--opm-selected-offset);
    z-index: 25 !important; /* 确保选中的状态图元在最上层，高于所有其他元素 */
    pointer-events: auto !important; /* 确保选中的状态图元可以接收鼠标事件 */
}

/* 连接悬停状态 */
.opm-element.link-hover {
    outline: var(--opm-link-hover-width) solid var(--opm-link-hover-color) !important;
    outline-offset: var(--opm-link-hover-offset);
    z-index: 999;
}

/* 激活状态 */
.opm-element.activated.opm-object {
    background-color: var(--opm-activated-object-bg) !important;
    color: var(--opm-activated-text-color) !important;
}

.opm-element.activated.opm-process {
    background-color: var(--opm-activated-process-bg) !important;
    color: var(--opm-activated-text-color) !important;
}

/* 状态变更中的样式 */
.opm-element.state-changing {
    opacity: 0.7;
    border-style: dashed !important;
    position: relative;
}

.opm-element.state-changing::after {
    content: "⟳";
    position: absolute;
    top: -8px;
    right: -8px;
    background-color: var(--primary-color);
    color: white;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    animation: spin 1s linear infinite;
    z-index: 10;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 执行状态的过程元素 - 使用激活状态的颜色，去除闪烁动画 */


/* 已执行过的过程元素 - 灰色边框，清除背景填充 */
.opm-element.executed.opm-process {
    --opm-element-border-color: var(--color-border-executed);
    border-color: var(--opm-element-border-color) !important;
    border-width: 2px !important;
    background-color: transparent !important; /* 清除背景填充色 */
}

/* pulse 动画已移除 - 过程图元运行时不再使用闪烁效果
@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}
*/

/* 激活状态的对象状态 */
.opm-object-state.activated {
    background-color: var(--opm-activated-state-bg) !important;
    color: var(--opm-activated-text-color) !important;
    z-index: 20 !important; /* 确保激活的状态图元有较高的层级 */
    pointer-events: auto !important; /* 确保激活的状态图元可以接收鼠标事件 */
}

/* ============================================
   视图样式
   ============================================ */

/* 分组容器样式 */
.opm-element.opm-group {
    position: absolute;
    padding: 0;
    min-width: 180px;
    min-height: 120px;
    box-sizing: border-box;
    background-color: transparent;
    border: 2px dashed var(--color-border-medium, #94a3b8) !important;
    border-radius: 18px;
    z-index: 1;
    transition: border-color var(--opm-transition-fast);
}

.opm-element.opm-group::after {
    display: none;
}

.opm-element.opm-group:hover {
    border-color: var(--color-border-dark, #6c757d);
}

.opm-element.opm-group.opm-locked {
    background-color: transparent;
    border-color: var(--color-border-light, #dee2e6);
    cursor: default;
}

.opm-element.opm-group.opm-locked::after {
    display: none;
}

.opm-element.opm-group.opm-locked:hover {
    border-color: var(--color-border-light, #dee2e6);
}

.opm-element.opm-group .group-title-container {
    position: absolute;
    padding: 0;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    background: transparent;
    border: none;
    border-radius: 0;
    box-shadow: none;
    pointer-events: none;
    transform-origin: center;
    white-space: nowrap;
}

.opm-element.opm-group[data-group-title-position="top"] .group-title-container {
    top: 8px;
    bottom: auto;
    left: 50%;
    right: auto;
    transform: translate(-50%, 0);
}

.opm-element.opm-group[data-group-title-position="bottom"] .group-title-container {
    top: auto;
    bottom: 8px;
    left: 50%;
    right: auto;
    transform: translate(-50%, 0);
}

.opm-element.opm-group[data-group-title-position="left"] .group-title-container {
    top: 50%;
    bottom: auto;
    left: 12px;
    right: auto;
    transform: translate(0, -50%);
    justify-content: flex-start !important;
    text-align: left;
    flex-direction: column;
}

.opm-element.opm-group[data-group-title-position="right"] .group-title-container {
    top: 50%;
    bottom: auto;
    left: auto;
    right: 12px;
    transform: translate(0, -50%);
    justify-content: flex-end !important;
    text-align: right;
    flex-direction: column;
}

.opm-element.opm-group .group-title-container .element-text {
    font-size: var(--font-size-xs);
    color: rgba(30, 41, 59, 0.88);
    letter-spacing: 0.5px;
    pointer-events: none;
    display: inline-block !important;
    text-align: center !important;
    justify-content: center !important;
    width: auto !important;
    height: auto !important;
}

.opm-element.opm-group.selected {
    background-color: rgba(191, 219, 254, 1);
}

.opm-element.opm-group .group-resize-handles {
    position: absolute;
    inset: 0;
    pointer-events: none;
    display: none;
    z-index: 2;
}

.opm-element.opm-group .group-resize-handle {
    position: absolute;
    width: calc(12px / var(--current-scale, 1));
    height: calc(12px / var(--current-scale, 1));
    border: 2px solid #2563eb;
    background: #ffffff;
    border-radius: 50%;
    pointer-events: auto;
    z-index: 3;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.25);
    transform: translate(-50%, -50%);
}

.opm-element.opm-group .group-resize-handle.handle-top-left {
    top: 0;
    left: 0;
    cursor: nwse-resize;
}

.opm-element.opm-group .group-resize-handle.handle-top {
    top: 0;
    left: 50%;
    cursor: ns-resize;
}

.opm-element.opm-group .group-resize-handle.handle-top-right {
    top: 0;
    left: 100%;
    cursor: nesw-resize;
}

.opm-element.opm-group .group-resize-handle.handle-right {
    top: 50%;
    left: 100%;
    cursor: ew-resize;
}

.opm-element.opm-group .group-resize-handle.handle-bottom-right {
    top: 100%;
    left: 100%;
    cursor: nwse-resize;
}

.opm-element.opm-group .group-resize-handle.handle-bottom {
    top: 100%;
    left: 50%;
    cursor: ns-resize;
}

.opm-element.opm-group .group-resize-handle.handle-bottom-left {
    top: 100%;
    left: 0;
    cursor: nesw-resize;
}

.opm-element.opm-group .group-resize-handle.handle-left {
    top: 50%;
    left: 0;
    cursor: ew-resize;
}

.opm-element.opm-group.manual-size-mode:not(.opm-locked).show-resize-handles .group-resize-handles,
.opm-element.opm-group.manual-size-mode:not(.opm-locked).group-resizing .group-resize-handles {
    display: block;
}

/* 视图基础样式 */
.opm-view {
    position: relative;
    border: 2px dashed var(--opm-view-color);
    border-radius: calc(8px * var(--current-scale, 1));
    background-color: rgba(95, 95, 95, 0);
    overflow: visible;
    min-width: 150px;
    min-height: 100px;
}

.opm-view.opm-locked {
    background-color: var(--color-bg-primary, #f4f5f7);
    cursor: default;
}

/* Card mode: when a view is very small on screen, render as a simple card
 * - Show a filled rounded rect
 * - Center a large title that counter-scales (keeps readable size)
 * - Internal elements are hidden via .hidden-by-view-card on those elements
 */
.opm-view.card-mode {
    background: var(--opm-view-card-bg);
    /* Light gray border with fixed width */
    border-style: solid;
    border-color: var(--opm-view-card-border, var(--opm-view-color));
    border-width: 2px;
    /* Ensure we can layer a pattern background */
    position: relative;
    overflow: hidden;
    /* Tighter default paddings for title fitting */
    --card-title-padding: 8px;          /* horizontal total padding */
    --card-title-padding-vert: 6px;     /* vertical total padding */
    --view-card-waiting-indicator: #ff8a3d;
}
.opm-view.card-mode.opm-locked {
    background: var(--opm-view-card-bg);
}
.opm-view.card-mode::before {
    /* Diagonal light-gray stripe pattern (non-gradient fill) */
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    /* SVG tile: a single 45° line across a square; repeated as a pattern */
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'><path d='M0 12 L12 0' stroke='%23000' stroke-opacity='0.06' stroke-width='1' shape-rendering='crispEdges'/></svg>");
    background-repeat: repeat;
    /* Keep visual density stable under zoom */
    background-size: calc(12px / var(--current-scale, 1)) calc(12px / var(--current-scale, 1));
}
.opm-view.card-mode .view-name {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transform-origin: center center;
    /* Keep readable font size across zoom; JS may adjust --card-title-font-size-px to fit */
    font-size: calc(var(--card-title-font-size-px, 16px) / var(--current-scale, 1));
    line-height: var(--card-title-line-height, 1.25);
    font-weight: 600;
    padding: 0; /* no chip bg */
    background: transparent;
    color: var(--opm-view-card-text);
    text-shadow: 0 1px 2px var(--opm-view-card-text-shadow);
    border-radius: 0;
    /* Adaptive wrapping area in screen pixels (converted back by dividing scale) */
    width: calc((var(--card-px-w, 240px) - var(--card-title-padding, 24px)) / var(--current-scale, 1));
    max-height: min(
        calc((var(--card-px-h, 160px) - var(--card-title-padding-vert, 24px)) / var(--current-scale, 1)),
        calc(
            var(--card-title-max-lines, 3)
            * var(--card-title-line-height, 1.25)
            * var(--card-title-font-size-px, 16px)
            / var(--current-scale, 1)
        )
    );
    overflow: hidden; /* JS 确保不溢出 */
    white-space: normal;
    word-break: break-word;
    overflow-wrap: anywhere;
    hyphens: auto;
    text-align: center;
    display: block;
}

.opm-view.card-mode.card-has-waiting::after {
    content: '';
    position: absolute;
    top: calc(6px / var(--current-scale, 1));
    right: calc(6px / var(--current-scale, 1));
    width: calc(10px / var(--current-scale, 1));
    height: calc(10px / var(--current-scale, 1));
    border-radius: 50%;
    background: var(--view-card-waiting-indicator);
    pointer-events: none;
    transform-origin: center center;
    animation: viewCardWaitingPulse 2.2s ease-in-out infinite;
    z-index: 2;
}

@keyframes viewCardWaitingPulse {
    0% {
        transform: scale(0.85);
        opacity: 0.65;
    }
    50% {
        transform: scale(1.15);
        opacity: 1;
    }
    100% {
        transform: scale(0.85);
        opacity: 0.65;
    }
}

.opm-view .view-name {
    position: absolute;
    top: calc(-4px * var(--current-scale, 1));
    left: calc(2px * var(--current-scale, 1));
    min-width: 0;
    max-width:fit-content;
    font-size: var(--font-size-sm);
    color: var(--opm-view-title-color, var(--opm-view-color));
    font-weight: var(--font-weight-bold);
    background-color: var(--opm-view-title-bg);
    padding: calc(1px * var(--current-scale, 1)) calc(4px * var(--current-scale, 1));
    border-radius: calc(3px * var(--current-scale, 1));
    pointer-events: auto !important;
    line-height: var(--line-height-normal);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    height: auto;
}

/* Hidden internals when parent view is in card mode */
.opm-element {
    /* Default visible; allow opacity transition for smoother card toggles */
    opacity: 1;
    transition: opacity 160ms ease-out;
}
.opm-element.hidden-by-view-card {
    opacity: 0 !important;
    pointer-events: none !important;
}

/* Links connected to hidden internals while in card mode: fade instead of instant hide */
.hidden-by-view-card-link {
    opacity: 0 !important;
    pointer-events: none !important;
}

/* 在卡片模式下仍然显示连线标签 */
.hidden-by-view-card-link .opm-link-label {
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: none !important;
}

.lod-zooming .opm-element,
.lod-zooming .opm-view,
.lod-zooming .opm-view::before,
.lod-zooming .opm-view .view-name,
.lod-zooming .hidden-by-view-card-link,
.lod-zooming .view-hierarchy-connection,
.lod-zooming .opm-link-path,
.lod-zooming .state-transition-particle,
.lod-zooming .propagation-particle {
    transition: none !important;
    animation: none !important;
}

/* 视图悬停效果 */
.opm-view:hover {
    border-color: var(--opm-view-color);
}

/* 视图拖拽时的样式 */
.opm-view.dragging {
    border-style: solid;
    box-shadow: none;
}

/* 视图调整大小时的样式 */
.opm-view.adjusting {
    border-color: var(--opm-view-color);
    transition: all 0.1s ease-out;
}

/* 视图移动时禁用所有动画和过渡，但不改变视觉样式 */
.opm-view.moving {
    transition: none !important;
    /* 不改变任何视觉属性，只禁用过渡动画 */
}

.opm-view.moving * {
    transition: none !important;
}

/* 视图激活状态 */
.opm-view.activated {
    border-color: var(--opm-view-color) !important;
}

/* 视图包含的元素样式 */
.opm-element.in-view {
    box-shadow: none;
    opacity: 0.9;
    /* 确保包含的元素仍然可以被选中和交互 */
    pointer-events: auto !important;
    cursor: pointer !important;
    z-index: 10 !important; /* 确保在视图之上，可以被点击 */
    /* 保持原有的position属性，不强制修改 */
}


/* 包含在视图中的元素被选中时的样式 */
.opm-element.in-view.selected {
    box-shadow: none;
    opacity: 1;
    pointer-events: auto !important;
    z-index: 15 !important; /* 选中时更高的z-index */
}

/* 分组图元在视图内仍需位于子元素之下，避免遮挡交互 */
.opm-element.in-view.opm-group,
.opm-view .opm-element.opm-group {
    z-index: 5 !important;
}

.opm-element.in-view.opm-group.selected {
    z-index: 6 !important;
}

/* 包含在视图中的元素工具提示 */
.opm-element.in-view::after {
    content: attr(data-view-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: var(--color-text-inverse);
    padding: 4px 4px;
    border-radius: 4px;
    font-size: var(--font-size-xs);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    z-index: 1000;
}

/* 确保视图内的所有OPM元素都可以被选择 */
.opm-view .opm-element {
    pointer-events: auto !important;
    z-index: 10 !important;
}

.opm-view .opm-object,
.opm-view .opm-process,
.opm-view .opm-object-state {
    pointer-events: auto !important;
    z-index: 10 !important;
    cursor: pointer !important;
}

/* 视图反馈样式 */
.view-feedback {
    background-color: var(--opm-view-color);
    color: var(--color-text-inverse);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    pointer-events: none;
    animation: view-feedback-appear 0.3s ease-out;
    transform: translateX(-100%);
}

@keyframes view-feedback-appear {
    0% {
        opacity: 0;
        transform: translateX(-100%) translateY(-10px);
    }
    100% {
        opacity: 1;
        transform: translateX(-100%) translateY(0);
    }
}

/* 右键菜单信息项样式 */
.context-menu-info {
    color: var(--color-text-muted) !important;
    font-style: italic;
    cursor: default !important;
}

.context-menu-info:hover {
    background-color: transparent !important;
}

/* 右键菜单分隔线 */
.context-menu-separator {
    height: 1px;
    background-color: var(--color-border-light);
    margin: 6px 0;
}

/* 连线层级管理 */
.opm-link {
    /* 连线显示在图元上方，但低于拖拽和悬停状态 */
    z-index: 50 !important;
}

.opm-link.selected {
    /* 选中的连线显示在更高层级 */
    z-index: 60 !important;
}

/* ============================================
   连接线样式
   ============================================ */

/* 连接线基础样式 */
.opm-link {
    pointer-events: all !important;
    cursor: pointer;
    /* 移除过渡效果避免选中状态闪烁 */
    transition: none;
}

/* SVG层样式 - 确保只有连线可以接收事件 */
#link-svg-layer {
    pointer-events: none !important;
}

/* Thicker hierarchy dashed connections when emphasized (outside card views) */
.view-hierarchy-connection.hierarchy-emphasis,
g.hierarchy-emphasis .view-hierarchy-connection {
    stroke-width: 4 !important;
}

/* Emphasize view hierarchy dashed connections when any card-mode views exist */

/* 连线元素覆盖父级设置 */
#link-svg-layer .opm-link {
    pointer-events: all !important;
}

.opm-link-label {
    font-size: 11px;
    font-weight: 500;
    fill: var(--opm-link-label-color, #f8fafc);
    stroke: var(--opm-link-label-stroke, rgba(15, 23, 42, 0.85));
    stroke-width: 3px;
    paint-order: stroke fill;
    pointer-events: none;
    user-select: none;
    letter-spacing: 0.2px;
}

.opm-link-label-start,
.opm-link-label-end {
    opacity: 0.95;
}

.opm-link-label-mid {
    font-weight: 600;
    opacity: 0.98;
}

/* During continuous scaling, avoid triggering transitions on many nodes */
/* Note: links fade via class change; transition can be provided by parent codebase if needed */

/* 连接线选中状态 */
.opm-link.selected {
    stroke: var(--opm-link-selected-color) !important;
    stroke-width: var(--opm-link-selected-width) !important;
}

/* 连接线选中状态 - 线条元素 */
.opm-link.selected line,
.opm-link.selected polyline,
.opm-link.selected path {
    stroke: var(--opm-link-selected-color) !important;
    stroke-width: var(--opm-link-selected-width) !important;
}

/* 连接线选中状态 - 箭头和圆形 */
.opm-link.selected polygon,
.opm-link.selected circle {
    fill: var(--opm-link-selected-color) !important;
    stroke: var(--opm-link-selected-color) !important;
}

.opm-link.related-to-selection:not(.selected) {
    z-index: 55 !important;
}

.opm-link.related-to-selection:not(.selected) line,
.opm-link.related-to-selection:not(.selected) polyline,
.opm-link.related-to-selection:not(.selected) path {
    stroke: #0ea5e9;
    stroke-width: var(--opm-link-hover-width);
}

.opm-link.related-to-selection:not(.selected) polygon,
.opm-link.related-to-selection:not(.selected) circle {
    fill: #0ea5e9;
    stroke: #0ea5e9;
    stroke-width: var(--opm-link-hover-width);
}

/* ============================================
   画布和网格样式
   ============================================ */

/* OPM画布网格背景 - 使用CSS变量适配主题 */
#opm-canvas {
    background-image: none;
    background-color: var(--canvas-bg-color, var(--color-bg-primary));
    /* background-size 和 background-position 将由 JS 设置 */
    touch-action: none;
    -ms-touch-action: none;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
}

/* 禁用默认手势，交给自定义的平移/缩放逻辑 */
.canvas-area {
    touch-action: none;
    -ms-touch-action: none;
}

/* 确保画布内的所有图元都遵循自定义手势逻辑 */
.canvas-area * {
    touch-action: none;
    -ms-touch-action: none;
    -webkit-touch-callout: none;
}

/* 编辑态（contenteditable/input/textarea）恢复默认手势，便于文本选择 */
.canvas-area [contenteditable="true"],
.canvas-area input,
.canvas-area textarea {
    touch-action: auto;
    -ms-touch-action: auto;
    -webkit-touch-callout: default;
    -webkit-user-select: text;
    user-select: text;
}

/* Notes overlay 位于 canvas-area 之外，单独禁用浏览器手势 */
#opm-notes-overlay,
#opm-notes-overlay * {
    touch-action: none;
    -ms-touch-action: none;
}

/* ============================================
   预览模式触摸支持
   ============================================ */

/* 预览模式下允许画布缩放 */
body.preview-mode #opm-canvas,
body.preview-mode .canvas-area,
body.version-preview-mode #opm-canvas,
body.version-preview-mode .canvas-area {
    touch-action: pinch-zoom;
    -ms-touch-action: pinch-zoom;
}

/* 预览模式下画布内容允许触摸 */
body.preview-mode .canvas-area *,
body.version-preview-mode .canvas-area * {
    touch-action: inherit;
    -ms-touch-action: inherit;
}

/* 预览模式下排除编辑元素 */
body.preview-mode .canvas-area [contenteditable="true"],
body.preview-mode .canvas-area input,
body.preview-mode .canvas-area textarea,
body.version-preview-mode .canvas-area [contenteditable="true"],
body.version-preview-mode .canvas-area input,
body.version-preview-mode .canvas-area textarea {
    touch-action: auto;
    -ms-touch-action: auto;
}

/* ============================================
   工具栏和菜单样式
   ============================================ */

/* 连接样式菜单 */
.connection-style-group {
    position: relative;
    display: inline-block;
    z-index: 10000; /* 提升父级z-index，确保菜单在最上层 */
}

.connection-style-menu {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border-light);
    border-radius: 4px;
    box-shadow: var(--shadow-lg);
    z-index: 999999;
    min-width: 120px;
    overflow: hidden;
}

.connection-style-item {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    cursor: pointer;
    color: var(--color-text-primary);
    font-size: var(--font-size-xs);
    font-family: var(--app-font-family);
    transition: background-color var(--opm-transition-fast);
    gap: 8px;
    min-height: 32px;
}

.connection-style-item:hover {
    background-color: var(--color-bg-hover);
}

.connection-style-item.active {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.connection-style-item span {
    font-family: var(--app-font-family);
    font-weight: var(--font-weight-bold);
}

/* ============================================
   上下文菜单样式
   ============================================ */

.context-menu {
    --context-menu-surface-bg: #f2f2f2;
    display: none;
    position: absolute;
    /* 默认由主题覆盖 */
    background-color: var(--context-menu-surface-bg);
    border: 1px solid var(--color-border-light);
    z-index: 12000;
    padding: 6px 0;
    font-size: var(--font-size-xs);
    font-family: var(--app-font-family);
    border-radius: 10px;
    box-shadow: none;
    opacity: 0;
    transform: translateY(-6px);
    transition: opacity 120ms ease, transform 120ms ease;
    min-width: 220px;
    overflow: visible;
}

/* 主题适配：浅色与深色 */
[data-theme="light"] .context-menu {
    --context-menu-surface-bg: #f2f2f2;
}

[data-theme="dark"] .context-menu {
    /* 深色下保持 60% 透明效果，避免过重块面 */
    --context-menu-surface-bg: color-mix(in oklab, var(--color-bg-primary) 40%, transparent);
    background-color: var(--context-menu-surface-bg);
}

.context-menu.show {
    display: block;
    opacity: 1;
    transform: scale(1) translateY(0);
}

.context-menu.hide {
    opacity: 0;
    transform: translateY(-6px);
}

.context-menu-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    color: var(--color-text-primary);
    cursor: pointer;
    transition: background-color 120ms ease, color 120ms ease;
    min-height: 30px;
}

.context-menu-item:hover,
.context-menu-item.active,
.context-menu-item[aria-selected="true"],
.context-menu-item:focus {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.context-menu-submenu {
    justify-content: space-between;
    position: relative;
}

.context-menu-submenu .submenu-label {
    flex: 1;
}

.context-menu-submenu .submenu-arrow {
    font-size: 0.75rem;
    opacity: 0.65;
}

.context-submenu {
    display: none;
    position: absolute;
    top: -6px;
    left: calc(100% - 6px);
    background-color: var(--context-menu-surface-bg);
    border: 1px solid var(--color-border-light);
    border-radius: 8px;
    min-width: 200px;
    padding: 6px 0;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.25);
    z-index: inherit;
}

.context-menu-submenu:hover > .context-submenu,
.context-menu-submenu:focus-within > .context-submenu {
    display: block;
}

.context-submenu .context-menu-item {
    min-width: 180px;
}

/* ============================================
   响应式和特殊状态
   ============================================ */

/* 移除滚轮缩放过渡 - 新缩放系统不需要 */

/* 拖拽状态下的图元样式 */
.opm-element.dragging {
    z-index: 1000;
    opacity: 0.8;
}

/* 确保图元在不同缩放级别下的清晰度 */
.opm-element,
.opm-object-state {
    /* 文字渲染优化 */
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   产品页面专用样式
   ============================================ */

/* 产品页面布局 */
.product-page body,
.product-page html {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow-x: hidden; /* 禁止水平滚动，防止画布被自动推移 */
    overflow-y: auto;   /* 允许垂直方向滚动条 */
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
}

/* 应用容器 */
.product-page .app-container {
    display: flex;
    height: 100vh;
    overflow: hidden; /* 保持隐藏以维持布局 */
}

html.mobile-title-editing,
body.mobile-title-editing {
    height: 100%;
    overflow: hidden;
}

.mobile-title-editing .app-container {
    height: var(--locked-viewport-height, 100vh);
    max-height: var(--locked-viewport-height, 100vh);
}

.mobile-title-editing .toolbar {
    position: fixed;
}

@media (max-width: 768px) and (pointer: coarse) {
    .product-page .toolbar {
        position: fixed;
        top: 8px;
        left: 50%;
        transform: translateX(-50%);
    }
}

/* 侧边栏样式已迁移到 sidebar.css - Sidebar styles moved to sidebar.css */

/* 折叠按钮 */
.product-page .collapse-button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 30px;
    background-color: var(--color-bg-tertiary);
    border: none;
    color: var(--color-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 12;
    font-size: var(--font-size-xl);
    line-height: var(--line-height-none);
    transition: background-color 0.2s, color 0.2s, left 0.3s cubic-bezier(0.4, 0, 0.2, 1), right 0.3s cubic-bezier(0.4, 0, 0.2, 1), border-radius 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-page .collapse-button:hover {
    background-color: var(--color-secondary);
    color: var(--color-bg-primary);
}

.product-page .collapse-button.left-collapse {
    left: -15px;
}

.product-page .collapse-button.left-collapse.collapsed {
    left: 0px;
    border-radius: 0 50% 50% 0;
}

.product-page .collapse-button.right-collapse {
    right: -15px;
}

.product-page .collapse-button.right-collapse.collapsed {
    right: 0px;
    border-radius: 50% 0 0 50%;
}


/* 主内容区 */
.product-page .main-content {
    flex: 1;
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0; /* 允许在flex布局中收缩，避免内容撑开推移画布 */
    overflow: hidden; /* 保持工具栏在可见区域内 */
}

/* 画布区域 */
.product-page .canvas-area {
    flex: 1;
    position: relative;
    width: 100%;
    height: 100%;
    overflow: visible; /* 允许元素超出边界显示 */
    /* 虚拟画布优化 */
    contain: none; /* 移除contain属性以允许无边界显示 */
    touch-action: none;
    -ms-touch-action: none;
}

/* 工具栏 - 完全透明居中布局 */
.product-page .toolbar {
    background-color: transparent;
    border: none;
    /* Add horizontal safe space on both sides */
    padding: 8px; /* inner padding */
    display: flex;
    flex-direction: column;
    gap: 6px;
    overflow: visible; /* 防止裁剪下拉菜单 */
    z-index: 10000; /* 提高z-index确保在最上层 */
    position: absolute; /* 浮动在画板上方 */
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    pointer-events: none; /* 让背景区域不阻挡鼠标事件 */
    /* 让工具栏可根据可用宽度自适应换行，避免被侧边栏遮挡 */
    width: auto;
    max-width: calc(100% - 10px);
    height: auto; /* 根据内容自动调整高度 */
    visibility: visible; /* 确保可见 */
    /* 取消左右安全区（回退至未考虑遮挡前的状态） */
    border-radius: 12px;
    transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.product-page .toolbar:not(.toolbar-hovering) {
    background-color: transparent;
    border: none;
    box-shadow: none;
}
/* 移除收缩态左侧安全区清零规则（回退） */

.product-page .toolbar.toolbar-hovering {
    background-color: var(--color-bg-primary);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}


.product-page .toolbar.toolbar-hovering .toolbar-row {
    background-color: transparent;
}

.product-page .toolbar-row {
    display: flex;
    gap: 4px;
    align-items: center;
    justify-content: flex-start;
    flex-wrap: nowrap;
    row-gap: 4px;   /* 行间距稍微留白 */
    pointer-events: auto; /* 恢复鼠标事件 */
    background-color: transparent;
    /* Add inner left/right padding so buttons don't stick to edges */
    padding: 6px 10px;
    width: auto;
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    box-sizing: border-box;
    margin: 0 auto;
}

.product-page .toolbar-row::-webkit-scrollbar {
    height: 0;
}

.product-page .toolbar-row-top {
    /* 上栏：画板管理图标 */
    margin-bottom: 2px;
    /* 保持单行：左侧边栏打开时也不换行 */
    flex-wrap: nowrap;
    overflow: auto;
}

.product-page .toolbar-row-bottom {
    /* 下栏：OPM图元、连接和布局图标 */
    margin-top: 0;
    /* 保持单行：左侧边栏打开时也不换行 */
    flex-wrap: nowrap;
    overflow: auto;
}

/* 收缩状态下，保持上栏不换行，避免高度被强制裁剪 */
/* 收缩状态下依旧保持单行（显式声明，便于阅读） */
.product-page .toolbar.collapsed .toolbar-row-top { flex-wrap: nowrap; }

.product-page .toolbar-separator {
    width: 1px;
    height: 24px;
    background: rgba(102, 102, 102, 0.6);
    margin: 0 3px;
    border-radius: 0.5px;
}

.product-page .toolbar-btn {
    background: transparent;
    border: none;
    color: var(--color-text-primary);
    padding: 2px;
    cursor: pointer;
    border-radius: var(--radius-base);
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    min-width: 32px;
    min-height: 32px;
    max-width: 32px;
    max-height: 32px;
    flex-shrink: 0;
    flex-grow: 0;
    position: relative;
    box-sizing: border-box;
}

.product-page .toolbar-btn:hover {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    border-radius: var(--radius-base);
    transform: translateY(-1px);
    box-shadow: none;
}

.product-page .toolbar-btn:active {
    opacity: 0.8;
}

@media (max-width: 768px) and (pointer: coarse) {
    .product-page .toolbar {
        position: fixed !important;
        top: max(8px, env(safe-area-inset-top)) !important;
        left: calc(50% + (var(--left-sidebar-width, 0px) / 2)) !important;
        transform: translateX(-50%) !important;
        max-width: calc(100% - var(--left-sidebar-width, 0px) - 16px) !important;
        z-index: 20000 !important;
    }
}

.product-page .mobile-zoom-controls {
    position: fixed;
    left: 50%;
    bottom: max(16px, env(safe-area-inset-bottom));
    display: none;
    flex-direction: row;
    gap: 10px;
    z-index: 20000;
    pointer-events: auto;
    transform: translateX(-50%);
}

.product-page .mobile-zoom-btn {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 1px solid rgba(0, 0, 0, 0.12);
    background: rgba(255, 255, 255, 0.92);
    color: #111827;
    font-size: 22px;
    font-weight: 600;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.18);
    -webkit-tap-highlight-color: transparent;
}

.product-page .mobile-zoom-btn:active {
    transform: translateY(1px);
}

@media (max-width: 768px) and (pointer: coarse) {
    .product-page .mobile-zoom-controls {
        display: flex;
        left: max(16px, env(safe-area-inset-left));
        transform: none;
        pointer-events: none;
    }

    .product-page .mobile-zoom-btn {
        pointer-events: auto;
    }
}

@media (max-width: 768px) and (pointer: coarse) {
    .product-page #left-sidebar.collapsed ~ #opm-canvas .mobile-zoom-controls {
        left: calc(72px + env(safe-area-inset-left));
    }
}

.toolbar-btn.feature-locked {
    opacity: 0.45 !important;
    cursor: not-allowed;
}

.toolbar-btn.feature-locked svg {
    opacity: 0.8;
}

/* 工具栏按钮提示 */
.product-page .toolbar-btn[title]:hover::after,
.product-page .toolbar .palette-item[title]:hover::after {
    content: attr(title);
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    /* 使用浅灰色背景以提升可读性 */
    background-color: rgba(240, 240, 240, 0.95);
    color: #333;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: var(--font-size-xs);
    white-space: nowrap;
    z-index: 10000;
    border: none;
    pointer-events: none;
    box-shadow: none;
    animation: tooltip-appear 0.15s ease-out;
    /* 防止tooltip影响布局 */
    position: fixed;
    transform: translateX(-50%) translateY(0);
}

@keyframes tooltip-appear {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-2px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.product-page .toolbar-btn[title]:hover::before,
.product-page .toolbar .palette-item[title]:hover::before {
    content: '';
    position: absolute;
    top: calc(100% + 2px);
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: none;
    border-right: none;
    border-bottom: none;
    z-index: 10001;
    pointer-events: none;
    animation: tooltip-appear 0.15s ease-out;
    /* 防止tooltip影响布局 */
    position: fixed;
}

/* 调色板项目 */
.product-page .palette-items {
    display: flex;
    gap: 8px;
    align-items: center;
}

.product-page .toolbar .palette-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2px;
    cursor: grab;
    border-radius: var(--radius-base);
    transition: all var(--transition-normal);
    width: 32px;
    height: 32px;
    min-width: 32px;
    min-height: 32px;
    max-width: 32px;
    max-height: 32px;
    flex-shrink: 0;
    flex-grow: 0;
    box-sizing: border-box;
    background: transparent;
    border: none;
    color: var(--color-text-primary);
}

.product-page .toolbar .palette-item.draggable {
    width: 36px;
    height: 36px;
}

.product-page .toolbar .palette-item:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text-inverse);
    transform: translateY(-1px);
    box-shadow: none;
}

.product-page .toolbar .palette-item.draggable {
    cursor: grab;
}

.product-page .toolbar .palette-item.link-item {
    cursor: pointer;
}

.product-page .toolbar .palette-item.active-link-type {
    background-color: var(--color-bg-tertiary);
    border: none;
    border-radius: var(--radius-base);
}

/* 对齐工具按钮样式 */
.product-page .toolbar .palette-item.alignment-btn {
    cursor: pointer;
    border: none;
}

.product-page .toolbar .palette-item.alignment-btn:hover:not(.disabled) {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
    color: var(--color-text-inverse);
}

.product-page .toolbar .palette-item.alignment-btn.disabled {
    opacity: 0.3;
    cursor: not-allowed;
    background-color: transparent;
    border-color: transparent;
}

.product-page .toolbar .palette-item.alignment-btn.disabled:hover {
    background-color: transparent !important;
    border-color: transparent !important;
    color: inherit !important;
    transform: none !important;
    box-shadow: none !important;
}

/* 画布区域 */
.product-page .canvas-area {
    flex: 1;
    position: relative;
    overflow: visible; /* 确保连线不被裁剪 */
}

/* 移除旧的缩放过渡样式 */

/* 视图层移动时的性能优化 */
.product-page .canvas-area.view-moving {
    /* 禁用不必要的过渡效果以提高性能 */
    transition: none !important;
}

/* 移除旧的视图层移动优化 */

/* 视图层移动时禁用悬停效果，避免意外的样式变化 */
.product-page .canvas-area.view-moving .opm-view:hover {
    border-color: var(--opm-view-color) !important;
    box-shadow: none !important;
}

/* 图标样式 */
.product-page .icon-object {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2230%22%20height%3D%2224%22%20viewBox%3D%220%200%2030%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Crect%20x%3D%224%22%20y%3D%224%22%20width%3D%2222%22%20height%3D%2216%22%20stroke%3D%22%23ff7a45%22%20stroke-width%3D%222%22%20fill%3D%22none%22%2F%3E%3C%2Fsvg%3E");
    background-size: 30px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 30px;
    height: 20px;
}

.product-page .icon-process {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2232%22%20height%3D%2224%22%20viewBox%3D%220%200%2032%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cellipse%20cx%3D%2216%22%20cy%3D%2212%22%20rx%3D%2214%22%20ry%3D%228%22%20stroke%3D%22%2300cc66%22%20stroke-width%3D%222%22%20fill%3D%22none%22%2F%3E%3C%2Fsvg%3E");
    background-size: 32px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 32px;
    height: 20px;
}

.product-page .icon-view {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2232%22%20height%3D%2224%22%20viewBox%3D%220%200%2032%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Crect%20x%3D%222%22%20y%3D%223%22%20width%3D%2228%22%20height%3D%2218%22%20rx%3D%224%22%20stroke%3D%22%23888888%22%20stroke-width%3D%222%22%20stroke-dasharray%3D%224%2C2%22%20fill%3D%22none%22%2F%3E%3C%2Fsvg%3E");
    background-size: 32px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 32px;
    height: 20px;
}

.product-page .icon-group {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2232%22%20height%3D%2224%22%20viewBox%3D%220%200%2032%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3C!--%20主矩形（浅灰色背景，虚线边框）%20--%3E%3Crect%20x%3D%223%22%20y%3D%223%22%20width%3D%2226%22%20height%3D%2218%22%20rx%3D%224%22%20stroke%3D%22%2394a3b8%22%20stroke-width%3D%221.5%22%20stroke-dasharray%3D%223%2C2%22%20fill%3D%22%23e2e8f0%22%20fill-opacity%3D%220.4%22%2F%3E%3C!--%20右上角折角%20--%3E%3Cpath%20d%3D%22M%2024%203%20L%2029%203%20L%2029%208%20Z%22%20fill%3D%22%23cbd5e1%22%20fill-opacity%3D%220.6%22%2F%3E%3C!--%20左上角标题容器%20--%3E%3Crect%20x%3D%225%22%20y%3D%225%22%20width%3D%2212%22%20height%3D%225%22%20rx%3D%222.5%22%20fill%3D%22white%22%20stroke%3D%22%2394a3b8%22%20stroke-width%3D%220.8%22%2F%3E%3C%2Fsvg%3E");
    background-size: 32px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 32px;
    height: 20px;
}

.product-page .icon-state {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Crect%20x%3D%224%22%20y%3D%228%22%20width%3D%2216%22%20height%3D%228%22%20rx%3D%224%22%20fill%3D%22none%22%20stroke%3D%22%23cccccc%22%2F%3E%3C%2Fsvg%3E");
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 20px;
    height: 20px;
}

.product-page .icon-generalization {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cpath%20d%3D%22M12%202L2%2022H22L12%202Z%22%20stroke%3D%22%23cccccc%22%20stroke-width%3D%222%22%20fill%3D%22none%22%2F%3E%3C%2Fsvg%3E");
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 20px;
    height: 20px;
}

.product-page .icon-characterization {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cpath%20d%3D%22M12%202L2%2022H22L12%202Z%22%20stroke%3D%22%23cccccc%22%20stroke-width%3D%222%22%20fill%3D%22none%22%2F%3E%3Cpolygon%20points%3D%2212,10%208,18%2016,18%22%20fill%3D%22%23cccccc%22%2F%3E%3C%2Fsvg%3E");
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 20px;
    height: 20px;
}

.product-page .icon-instance {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cpath%20d%3D%22M12%202L2%2022H22L12%202Z%22%20stroke%3D%22%23cccccc%22%20stroke-width%3D%222%22%20fill%3D%22none%22%2F%3E%3Ccircle%20cx%3D%2212%22%20cy%3D%2216%22%20r%3D%223%22%20fill%3D%22%23cccccc%22%2F%3E%3C%2Fsvg%3E");
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 20px;
    height: 20px;
}

.product-page .icon-aggregation {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cpath%20d%3D%22M12%202L2%2022H22L12%202Z%22%20stroke%3D%22%23cccccc%22%20stroke-width%3D%222%22%20fill%3D%22%23cccccc%22%2F%3E%3C%2Fsvg%3E");
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 20px;
    height: 20px;
}

.product-page .icon-unidirectional {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cpath%20d%3D%22M2%2012H22%22%20stroke%3D%22%23cccccc%22%20stroke-width%3D%222%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3Cpolygon%20points%3D%2218%2C12%2012%2C2%2012%2C22%22%20fill%3D%22%23cccccc%22%2F%3E%3C%2Fsvg%3E");
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 20px;
    height: 20px;
}

.product-page .icon-bidirectional {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cpolygon%20points%3D%222%2C12%2012%2C2%2012%2C22%22%20fill%3D%22%23cccccc%22%2F%3E%3Cpolygon%20points%3D%2222%2C12%2012%2C2%2012%2C22%22%20fill%3D%22%23cccccc%22%2F%3E%3Cpath%20d%3D%22M2%2012H22%22%20stroke%3D%22%23cccccc%22%20stroke-width%3D%222%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3C%2Fsvg%3E");
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 20px;
    height: 20px;
}

.product-page .icon-instrument {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cline%20x1%3D%222%22%20y1%3D%2212%22%20x2%3D%2215%22%20y2%3D%2212%22%20stroke%3D%22%23cccccc%22%20stroke-width%3D%222%22%2F%3E%3Ccircle%20cx%3D%2219%22%20cy%3D%2212%22%20r%3D%224%22%20fill%3D%22none%22%20stroke%3D%22%23cccccc%22%20stroke-width%3D%222%22%2F%3E%3C%2Fsvg%3E");
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 20px;
    height: 20px;
}

.product-page .icon-master-control {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cline%20x1%3D%222%22%20y1%3D%2212%22%20x2%3D%2222%22%20y2%3D%2212%22%20stroke%3D%22%23cccccc%22%20stroke-width%3D%222%22%2F%3E%3Ccircle%20cx%3D%2219%22%20cy%3D%2212%22%20r%3D%224%22%20fill%3D%22%23cccccc%22%2F%3E%3C%2Fsvg%3E");
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 20px;
    height: 20px;
}

.product-page .icon-consumption {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cline%20x1%3D%222%22%20y1%3D%2212%22%20x2%3D%2215%22%20y2%3D%2212%22%20stroke%3D%22currentColor%22%20stroke-width%3D%222%22%2F%3E%3Cpath%20d%3D%22M15%2012L22%209L22%2015L15%2012Z%22%20fill%3D%22currentColor%22%2F%3E%3C%2Fsvg%3E");
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 20px;
    height: 20px;
}

.product-page .icon-result {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cline%20x1%3D%222%22%20y1%3D%2212%22%20x2%3D%2222%22%20y2%3D%2212%22%20stroke%3D%22currentColor%22%20stroke-width%3D%222%22%2F%3E%3Cpath%20d%3D%22M18%2012L22%2010L22%2014L18%2012Z%22%20fill%3D%22currentColor%22%2F%3E%3C%2Fsvg%3E");
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 20px;
    height: 20px;
}

.product-page .icon-effect {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cline%20x1%3D%222%22%20y1%3D%2212%22%20x2%3D%2222%22%20y2%3D%2212%22%20stroke%3D%22%23cccccc%22%20stroke-width%3D%222%22%2F%3E%3Ccircle%20cx%3D%2222%22%20cy%3D%2212%22%20r%3D%223%22%20stroke%3D%22%23cccccc%22%20stroke-width%3D%222%22%20fill%3D%22none%22%2F%3E%3C%2Fsvg%3E");
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 20px;
    height: 20px;
}

.product-page .icon-sequence {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cpath%20d%3D%22M4%2012H20M20%2012L16%208M20%2012L16%2016%22%20stroke%3D%22%23cccccc%22%20stroke-width%3D%222%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3C%2Fsvg%3E");
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 20px;
    height: 20px;
}

.product-page .icon-trigger {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cpath%20d%3D%22M3%2012L8%2010L14%2014L18%2012%22%20stroke%3D%22%23cccccc%22%20stroke-width%3D%222%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%20fill%3D%22none%22%2F%3E%3Cpolygon%20points%3D%2223%2C12%2018%2C8%2018%2C16%22%20fill%3D%22%23cccccc%22%2F%3E%3C%2Fsvg%3E");
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 20px;
    height: 20px;
}

.product-page .icon-labeled-directed {
    background-image: url("data:image/svg+xml;utf8,%3Csvg%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cline%20x1%3D%224%22%20y1%3D%2212%22%20x2%3D%2220%22%20y2%3D%2212%22%20stroke%3D%22%23cccccc%22%20stroke-width%3D%222%22%20stroke-linecap%3D%22round%22%20stroke-dasharray%3D%224%203%22%2F%3E%3Cline%20x1%3D%2220%22%20y1%3D%2212%22%20x2%3D%2216%22%20y2%3D%228%22%20stroke%3D%22%23cccccc%22%20stroke-width%3D%222%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%2F%3E%3C%2Fsvg%3E");
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: center;
    width: 20px;
    height: 20px;
}

/* 模态框样式 */
.product-page .modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 3000;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity 0.3s ease-out;
}

.product-page .modal-content {
    background-color: #2a2a2a;
    border: none;
    border-radius: 8px;
    width: 80%;
    max-width: 800px;
    max-height: 80%;
    display: flex;
    flex-direction: column;
    /* 移除默认transform，动画时再加 */
    transform: none;
    opacity: 1;
    transition: transform 0.3s ease-out, opacity 0.3s ease-out;
    margin: 0;
    left: 0;
    top: 0;
}

.product-page .modal-header {
    background-color: #1a1a1a;
    border-bottom: none;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.product-page .modal-header h3 {
    color: var(--color-primary);
    margin: 0;
    font-family: var(--app-font-family);
    font-size: 1.1rem;
    text-transform: uppercase;
}

.product-page .modal-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.product-page .modal-btn {
    background: transparent;
    border: none;
    color: #00ff41;
    padding: 6px 12px;
    font-family: var(--app-font-family);
    font-size: 0.8rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    border-radius: 3px;
    transition: all 0.2s ease;
}

.product-page .modal-btn:hover {
    background: #00ff41;
    color: #1a1a1a;
}

.product-page .modal-close {
    background: none;
    border: none;
    color: #cccccc;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s ease;
}

.product-page .modal-close:hover {
    color: var(--color-primary);
}

.product-page .modal-body {
    padding: 20px;
    flex-grow: 1;
    overflow: auto;
}

/* 滚动条样式 */
.product-page ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.product-page ::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

.product-page ::-webkit-scrollbar-thumb {
    background: var(--color-border-medium);
    border-radius: 4px;
}

.product-page ::-webkit-scrollbar-thumb:hover {
    background: var(--color-border-dark);
}

.product-page ::-webkit-scrollbar-corner {
    background: var(--color-bg-secondary);
}

/* 亮色主题产品页面滚动条优化 */
[data-theme="light"] .product-page ::-webkit-scrollbar-track {
    background: #f8f9fa;
}

[data-theme="light"] .product-page ::-webkit-scrollbar-thumb {
    background: #adb5bd;
    border-radius: 4px;
}

[data-theme="light"] .product-page ::-webkit-scrollbar-thumb:hover {
    background: #6c757d;
}

[data-theme="light"] .product-page ::-webkit-scrollbar-corner {
    background: #f8f9fa;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .product-page .nav-logo span:last-child {
        display: none;
    }
    
    .product-page .nav-logo > div:nth-child(2) {
        display: none;
    }
}

@media (max-width: 768px) {
    .product-page .minimal-nav > div {
        padding: 15px 20px !important;
    }
    
    .product-page .nav-links {
        gap: 20px !important;
    }
    
    .product-page .nav-links a {
        font-size: var(--font-size-xs) !important;
    }
    
    .product-page .hero-section {
        padding: 40px 30px 0;
    }
    
    .product-page .hero-logo {
        top: 8px;
        left: 15px;
    }
    
    .product-page .logo-icon {
        width: 80px;
        height: 80px;
    }
    
    .product-page .logo-svg {
        width: 60px;
        height: 60px;
    }
    
    .product-page .logo-text {
        font-size: var(--font-size-xs);
        letter-spacing: 0.5px;
    }
    
    .product-page .hero-content {
        gap: 40px;
        margin-top: 100px;
    }
    
    .product-page .title-main {
        font-size: var(--font-size-4xl);
    }
    
    .product-page .subtitle-text {
        font-size: var(--font-size-xs);
        letter-spacing: 1px;
        margin-top: 3px;
    }
    
    .product-page .title-sub {
        font-size: var(--font-size-base);
    }
    
    .product-page .hero-description {
        font-size: var(--font-size-lg);
        margin-top: 20px;
    }
    
    .product-page .opd-diagram {
        max-width: 600px;
        padding: 20px;
    }
    
    .product-page .use-cases-grid {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .product-page .section-title {
        font-size: var(--font-size-4xl);
    }
    
    .product-page .cta-content h2 {
        font-size: var(--font-size-4xl);
    }
    
    .product-page .features-section,
    .product-page .use-cases-section,
    .product-page .final-cta-section {
        padding: 120px 40px;
    }
}

/* ============================================
   状态操作动画
   ============================================ */

/* 状态添加动画 */
@keyframes state-add-animation {
    0% {
        opacity: 0;
        transform: scale(0.3) translateY(-10px) rotate(-2deg);
        filter: blur(2px);
        border-color: transparent;
    }
    30% {
        opacity: 0.6;
        transform: scale(0.8) translateY(-5px) rotate(-1deg);
        filter: blur(1px);
        border-color: var(--opm-object-state-color);
    }
    70% {
        opacity: 0.9;
        transform: scale(1.1) translateY(-2px) rotate(1deg);
        filter: blur(0px);
        border-color: var(--opm-object-state-color);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0) rotate(0deg);
        filter: blur(0px);
        border-color: var(--opm-object-state-color);
    }
}

/* 状态删除动画 */
@keyframes state-remove-animation {
    0% {
        opacity: 1;
        transform: scale(1) translateY(0) rotate(0deg);
        filter: blur(0px);
        border-color: var(--opm-object-state-color);
    }
    30% {
        opacity: 0.8;
        transform: scale(0.9) translateY(-3px) rotate(-1deg);
        filter: blur(0.5px);
        border-color: var(--color-primary);
    }
    70% {
        opacity: 0.3;
        transform: scale(0.5) translateY(-10px) rotate(-3deg);
        filter: blur(2px);
        border-color: var(--color-primary);
    }
    100% {
        opacity: 0;
        transform: scale(0.1) translateY(-20px) rotate(-5deg);
        filter: blur(4px);
        border-color: transparent;
    }
}

/* 状态编辑进入动画 */
@keyframes state-edit-enter {
    0% {
        background-color: var(--opm-element-bg);
        border-color: var(--opm-object-state-color);
        transform: scale(1);
    }
    50% {
        background-color: var(--opm-element-bg-hover);
        border-color: var(--opm-object-state-color);
        transform: scale(1.05);
    }
    100% {
        background-color: var(--opm-element-bg-hover);
        border-color: var(--opm-object-state-color);
        transform: scale(1.02);
    }
}

/* 状态编辑退出动画 */
@keyframes state-edit-exit {
    0% {
        background-color: var(--opm-element-bg-hover);
        border-color: var(--opm-object-state-color);
        transform: scale(1.02);
    }
    100% {
        background-color: var(--opm-element-bg);
        border-color: var(--opm-object-state-color);
        transform: scale(1);
    }
}

/* 状态布局切换动画 */
@keyframes state-layout-switch {
    0% {
        opacity: 1;
        transform: scale(1);
        filter: brightness(1);
    }
    25% {
        opacity: 0.8;
        transform: scale(0.98);
        filter: brightness(1.2);
    }
    50% {
        opacity: 0.7;
        transform: scale(0.95);
        filter: brightness(1.4);
    }
    75% {
        opacity: 0.9;
        transform: scale(1.02);
        filter: brightness(1.1);
    }
    100% {
        opacity: 1;
        transform: scale(1);
        filter: brightness(1);
    }
}

/* 状态脉冲动画 - 用于强调操作 */
@keyframes state-pulse {
    0% {
        box-shadow: none;
        transform: scale(1);
    }
    50% {
        box-shadow: none;
        transform: scale(1.02);
    }
    100% {
        box-shadow: none;
        transform: scale(1);
    }
}

/* 状态操作动画类 */
.opm-object-state.state-adding {
    animation: state-add-animation 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.opm-object-state.state-removing {
    animation: state-remove-animation 0.3s cubic-bezier(0.55, 0.085, 0.68, 0.53);
    pointer-events: none;
}

.opm-object-state.state-editing {
    animation: state-edit-enter 0.2s ease-out;
    background-color: var(--opm-element-bg-hover);
    border-color: #daa520;
    transform: scale(1.02);
}

.opm-object-state.state-edit-exit {
    animation: state-edit-exit 0.2s ease-in;
}

.opm-object-state.layout-switching {
    animation: state-layout-switch 0.3s ease-in-out;
}

.opm-object-state.state-pulse {
    animation: state-pulse 0.6s ease-out;
}

/* 对象容器布局切换动画 */
.opm-element.opm-object.layout-switching {
    transition: all var(--opm-transition-normal);
}

.opm-element.opm-object.layout-switching .opm-object-state {
    animation: state-layout-switch 0.3s ease-in-out;
}

#selection-rect {
    pointer-events: none;
    border: 1.5px dashed #ffff00;
    background: rgba(255, 238, 0, 0.08);
    position: absolute;
    z-index: 10000;
    display: none;
    border-radius: 4px;
    
    box-shadow: none;
}

/* 清空画板确认对话框样式 */
.modal #confirm-cancel:hover {
    background: #555 !important;
    color: #cccccc !important;
    border-color: #666 !important;
}

.modal #confirm-ok:hover {
    background: var(--color-primary) !important;
    color: var(--color-text-inverse) !important;
    border-color: var(--color-primary) !important;
    transform: translateY(-1px);
    box-shadow: none;
}

.modal #confirm-ok:active {
    transform: translateY(0);
    box-shadow: none;
}



/* 亮色模式下非激活图元的文字颜色适配 */
[data-theme="light"] .opm-element.opm-object:not(.activated) {
    color: var(--opm-activated-text-color) !important;
}

[data-theme="light"] .opm-element.opm-process:not(.activated) {
    color: var(--opm-activated-text-color) !important;
}


/* ====================================================
   仿真控制按钮样式
   ==================================================== */

/* 运行/停止仿真按钮 */
#run-simulation-btn {
    border: none !important;
    box-shadow: none !important;
    background: transparent;
    color: #cccccc;
}

/* 暂停/继续按钮 */
#pause-simulation-btn {
    border: none !important;
    box-shadow: none !important;
    background: transparent;
    color: #cccccc;
    margin-left: 6px;
}

/* 默认显示暂停图标，隐藏继续图标 */
#pause-simulation-btn .pause-icon { display: inline-block; }
#pause-simulation-btn .resume-icon { display: none; }

/* 处于 paused 状态时，显示继续图标 */
#pause-simulation-btn.paused .pause-icon { display: none; }
#pause-simulation-btn.paused .resume-icon { display: inline-block; }

/* 禁用态降低不透明度 */
#pause-simulation-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}
/* 禁用时强制将图标渲染为灰色 */
#pause-simulation-btn:disabled svg,
#pause-simulation-btn:disabled svg * {
    fill: #888888 !important;
    stroke: #888888 !important;
}

/* 仿真状态指示器 */
.simulation-status-indicator {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 8px 16px;
    background: rgba(0, 0, 0, 0.8);
    border: none;
    border-radius: 4px;
    color: #cccccc;
    font-size: var(--font-size-xs);
    font-family: var(--app-font-family);
    z-index: 10000;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    pointer-events: none;
}

.simulation-status-indicator.visible {
    opacity: 1;
    transform: translateY(0);
}

.simulation-status-indicator.running {
    border-color: var(--simulation-run-color);
    color: var(--simulation-run-color);
}

.simulation-status-indicator.stopped {
    border-color: var(--simulation-stop-color);
    color: var(--simulation-stop-color);
}

.simulation-status-indicator.reset {
    border-color: var(--simulation-reset-color);
    color: var(--simulation-reset-color);
}

/* ====================================================
   画布状态指示器样式
   ==================================================== */

.canvas-status-indicator {
    position: absolute;
    top: 20px;
    left: 80px; /* 避开左侧边栏折叠按钮 */
    padding: 8px 16px;
    background: rgba(0, 0, 0, 0.85);
    border: none;
    border-radius: 6px;
    color: #cccccc;
    font-size: var(--font-size-xs);
    font-family: var(--app-font-family);
    z-index: 1000;
    pointer-events: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
    opacity: 0;
    transform: translateX(-10px);
}

.canvas-status-indicator.running {
    opacity: 1;
    transform: translateX(0);
    border-color: var(--simulation-run-color);
    color: var(--simulation-run-color);
    box-shadow: none;
}

.canvas-status-indicator.stopped {
    opacity: 1;
    transform: translateX(0);
    border-color: var(--simulation-stop-color);
    color: var(--simulation-stop-color);
    box-shadow: none;
}

.canvas-status-indicator.reset {
    opacity: 1;
    transform: translateX(0);
    border-color: var(--simulation-reset-color);
    color: var(--simulation-reset-color);
    box-shadow: none;
}

.canvas-status-indicator.running::before,
.canvas-status-indicator.stopped::before,
.canvas-status-indicator.reset::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    animation: canvas-status-pulse 1.5s ease-in-out;
}

.canvas-status-indicator.running::before {
    background: var(--simulation-run-color);
}

.canvas-status-indicator.stopped::before {
    background: var(--simulation-stop-color);
}

.canvas-status-indicator.reset::before {
    background: var(--simulation-reset-color);
}

.canvas-status-indicator.running,
.canvas-status-indicator.stopped,
.canvas-status-indicator.reset {
    padding-left: 24px; /* 为指示器留出空间 */
}

@keyframes canvas-status-pulse {
    0%, 100% {
        opacity: 1;
        transform: translateY(-50%) scale(1);
    }
    50% {
        opacity: 0.5;
        transform: translateY(-50%) scale(1.2);
    }
}

/* 连线标签编辑器 */
.link-label-editor {
    position: absolute;
    display: none;
    flex-direction: column;
    gap: 12px;
    min-width: 260px;
    padding: 16px 20px;
    border-radius: 12px;
    background: rgba(15, 23, 42, 0.92);
    border: 1px solid rgba(148, 163, 184, 0.35);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(10px);
    z-index: 5000;
}

.link-label-editor.visible {
    display: flex;
}

.link-label-editor__title {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-primary, #f8fafc);
    margin-bottom: 6px;
}

.link-label-editor__field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.link-label-editor__label {
    font-size: 12px;
    color: var(--color-text-secondary, #cbd5f5);
    margin-top: 8px;
}

.link-label-editor__field:first-of-type .link-label-editor__label {
    margin-top: 0;
}

.link-label-editor input[type="text"] {
    width: 100%;
    padding: 8px 10px;
    border-radius: 6px;
    border: 1px solid rgba(148, 163, 184, 0.4);
    background: rgba(15, 23, 42, 0.6);
    color: var(--color-text-primary, #f8fafc);
    font-size: 12px;
}

.link-label-editor input[type="text"]:focus {
    outline: none;
    border-color: rgba(59, 130, 246, 0.8);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}

.link-label-editor textarea.link-label-editor__textarea {
    width: 100%;
    padding: 8px 10px;
    border-radius: 6px;
    border: 1px solid rgba(148, 163, 184, 0.4);
    background: rgba(15, 23, 42, 0.6);
    color: var(--color-text-primary, #f8fafc);
    font-size: 12px;
    font-family: inherit;
    resize: vertical;
    min-height: 44px;
    line-height: 1.4;
}

.link-label-editor textarea.link-label-editor__textarea:focus {
    outline: none;
    border-color: rgba(59, 130, 246, 0.8);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}

.link-label-editor textarea.link-label-editor__textarea::placeholder {
    color: rgba(148, 163, 184, 0.6);
}

.link-label-editor__actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 8px;
}

.link-label-editor__btn {
    padding: 6px 12px;
    font-size: 12px;
    border-radius: 6px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    font-weight: 500;
}

.link-label-editor__btn--ghost {
    background: transparent;
    color: var(--color-text-secondary, #cdd5e0);
    border-color: rgba(148, 163, 184, 0.4);
}

.link-label-editor__btn--ghost:hover {
    border-color: rgba(148, 163, 184, 0.8);
    color: var(--color-text-primary, #f8fafc);
}

.link-label-editor__btn--primary {
    background: var(--color-primary, #2563eb);
    color: #f8fafc;
}

.link-label-editor__btn--primary:hover {
    background: var(--color-primary-strong, #1d4ed8);
}

[data-theme="light"] .link-label-editor {
    background: rgba(248, 250, 255, 0.98);
    border: 1px solid rgba(148, 163, 184, 0.45);
    box-shadow: 0 16px 32px rgba(15, 23, 42, 0.18);
    color: #0f172a;
}

[data-theme="light"] .link-label-editor__title {
    color: #0f172a;
}

[data-theme="light"] .link-label-editor__label {
    color: #475569;
}

[data-theme="light"] .link-label-editor input[type="text"] {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(148, 163, 184, 0.6);
    color: #0f172a;
}

[data-theme="light"] .link-label-editor input[type="text"]::placeholder {
    color: rgba(100, 116, 139, 0.8);
}

[data-theme="light"] .link-label-editor input[type="text"]:focus {
    border-color: rgba(59, 130, 246, 0.65);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.15);
}

[data-theme="light"] .link-label-editor textarea.link-label-editor__textarea {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(148, 163, 184, 0.6);
    color: #0f172a;
}

[data-theme="light"] .link-label-editor textarea.link-label-editor__textarea::placeholder {
    color: rgba(100, 116, 139, 0.8);
}

[data-theme="light"] .link-label-editor textarea.link-label-editor__textarea:focus {
    border-color: rgba(59, 130, 246, 0.65);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.15);
}

[data-theme="light"] .link-label-editor__btn--ghost {
    color: #475569;
    border-color: rgba(148, 163, 184, 0.5);
}

[data-theme="light"] .link-label-editor__btn--ghost:hover {
    color: #0f172a;
    border-color: rgba(100, 116, 139, 0.8);
    background: rgba(226, 232, 240, 0.8);
}

[data-theme="light"] .link-label-editor__btn--primary {
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.25);
}

/* 默认隐藏状态样式被新的状态样式覆盖 */

/* ============================================
   运行仿真按钮图标切换样式
   ============================================ */

/* 默认状态：显示播放图标，隐藏停止图标 */
 .play-icon {
    display: block;
}

 .stop-icon {
    display: none;
}

/* 运行状态：隐藏播放图标，显示停止图标 */
.running .play-icon {
    display: none;
}

.running .stop-icon {
    display: block;
}

#run-simulation-btn.running {
    background-color: transparent !important;
    background: var(--color-primary);
    border: none !important;
    box-shadow: none;
    border-radius: 4px;
    
}

/* 过程执行进度条动画 */
.execution-progress {
    position: absolute;
    bottom: -4px;
    left: 0;
    height: 2px;
    background: #00ff65;
    width: 0%;
    border-radius: 1px;
    transition: width 1s linear; /* JS可动态调整duration */
    pointer-events: none;
    z-index: 10;
}

/* 激活传播粒子动画 */
.propagation-particle {
    position: fixed;
    width: 4px;
    height: 4px;
    background: #00ff88;
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    animation: opm-particle-move 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
    /* 支持JS动态设置 --delta-x/--delta-y */
    transform: translate(var(--delta-x, 0), var(--delta-y, 0));
}

@keyframes opm-particle-move {
    from {
        transform: translate(0, 0);
        opacity: 1;
    }
    to {
        transform: translate(var(--delta-x, 0), var(--delta-y, 0));
        opacity: 0.2;
    }
}

/* ============================================
   系统图元特殊样式 - 需要放在文件最后以确保优先级
   ============================================ */

/* 开始系统图元样式 - 蓝色边框（对象和过程都适用） */
.opm-element.opm-object.system-start,
.opm-element.opm-process.system-start {
    --opm-element-border-color: #4c9ae7;
    border-color: var(--opm-element-border-color) !important; /* 道奇蓝 */
    border-width: 2px !important;
    border-style: solid !important;
}

/* 结束系统图元样式 - 紫色边框（对象和过程都适用） */
.opm-element.opm-object.system-end,
.opm-element.opm-process.system-end {
    --opm-element-border-color: #a354ca;
    border-color: var(--opm-element-border-color) !important; /* 深兰花紫 */
    border-width: 2px !important;
    border-style: solid !important;
}

/* 激活状态下的系统图元样式 */
.opm-element.opm-object.system-start.activated,
.opm-element.opm-process.system-start.activated {
    --opm-element-border-color: #3b8ada;
    border-color: var(--opm-element-border-color) !important; /* 更深的蓝色 */
    background-color: #c9f0ff !important; /* 蓝色不透明填充 */
}

.opm-element.opm-object.system-end.activated,
.opm-element.opm-process.system-end.activated {
    --opm-element-border-color: #e249e2;
    border-color: var(--opm-element-border-color) !important; /* 更深的紫色 */
    background-color: #f0e6ff !important; /* 紫色不透明填充 */
}
.opm-element.opm-group[data-group-title-position="left"] .group-title-container .element-text,
.opm-element.opm-group[data-group-title-position="right"] .group-title-container .element-text {
    writing-mode: vertical-rl;
    text-orientation: mixed;
}