:root {
    --metro-blue-bg: #001d31;
    --bg-color2: #ffffff;
    --tool-bg-color: #001d31;
    --icon-clr: #001d31;

    /* Mode A/B 动态配色变量 */
    --mode-bg: #001d31;
    --mode-item: #ffffff;
    --mode-cls: #ffffff;
    --mode-divider: #ffffff;
    --mode-ydivider: #fff100;
}

body[data-mode="B"] {
    --mode-bg: #ffffff;
    --mode-item: #001d31;
    --mode-cls: rgba(0, 0, 0, 0);
    --mode-divider: #001d31;
    --mode-ydivider: #001d31;
}

[data-theme="dark"] {
    --bg-color2: #2b2b2b;
    --tool-bg-color: #2b2b2b;
    --icon-clr: #e5e8ea;
}

/* 暗色模式下加深画板阴影 */
[data-theme="dark"] .canvas {
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] .canvas.active {
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.1);
    /* 增加微弱边框辅助区分 */
}

/* 2. 基础布局与重置 */
body {
    overflow: hidden;
    /* 防止双重滚动条 */
    background-color: var(--bg-color);
}

.tool-header {
    justify-content: space-between;
    padding: 8px 20px;
    align-items: center;
    /* 桌面端垂直居中 */
    display: flex;
    /* 桌面端默认 Flex */
}

.header-right {
    gap: 8px;
    display: flex;
    align-items: center;
}

.header-actions,
.header-system,
.export-group {
    display: flex;
    gap: 8px;
    align-items: center;
}

.btn-cln {
    background-color: var(--diff-bg);
    color: var(--diff-text);
    border-color: var(--diff-text);
}

/* 3. 左侧工具栏 (Toolbar Panel) */
.toolbar-panel {
    width: 280px;
    background-color: var(--panel-bg);
    /* 随主题变 */
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: background-color 0.3s, border-color 0.3s;
}

/* 选项卡 (Tabs) */
.toolbar-tabs {
    flex-shrink: 0;
    padding: 8px;
    border-bottom: 1px solid var(--border-color);
    background: var(--panel-bg);
    /* 随主题变 */
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.toolbar-tab {
    padding: 5px 15px;
    /* 调整内边距 */
    cursor: pointer;
    border-radius: 6px;
    transition: background-color 0.2s;
    font-size: 0.85rem;
    white-space: nowrap;
    color: var(--text-light);
    /* 随主题变 */
    /* Flex布局确保图标和文字垂直对齐 */
    display: flex;
    align-items: center;
}

.toolbar-tab:hover {
    background-color: var(--tab-hover);
}

.toolbar-tab.active {
    background-color: var(--btn-info-bg);
    color: var(--text-main);
    font-weight: 500;
}

/* --- 工具栏分组图标样式 --- */
.toolbar-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-right: 8px;
    /* 图标与文字间距 */
    line-height: 1;
}

.toolbar-icon svg {
    width: 1.2em;
    /* 相对字体大小，约 16-17px */
    height: 1.2em;
    fill: currentColor;
    /* 关键：颜色跟随文字 (选中变紫，平时跟随主题) */
    pointer-events: none;
}

/* 工具栏图标区域 (素材网格) */
.toolbar-items {
    flex: 1;
    padding: 10px;
    padding-bottom: 20px;
    overflow-y: auto;
    overflow-x: hidden;
    display: grid;
    grid-template-columns: repeat(4, 60px);
    /* 保持网格 */
    gap: 10px;
    justify-content: center;
    align-content: start;
    background-color: var(--bg-color);
    /* 内容区背景随主题 */
}

/* --- [重要] 素材视觉保护 --- */
/* 工具栏里的图标是导向标志素材，必须保持其原始的深蓝背景，否则看不清 */
.toolbar-item {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    /* 强制使用深蓝背景，不随主题变 */
    background-color: var(--tool-bg-color);
    border-radius: 6px;
    cursor: pointer;
    transition: transform 0.2s;
    overflow: hidden;
    position: relative;
    border: 1px solid transparent;
}

[data-theme="dark"] .toolbar-item {
    border-color: #333;
    /* 深色模式下加个微弱边框增加立体感 */
}

.toolbar-item:hover {
    transform: scale(1.05);
    z-index: 2;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.toolbar-item img {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
}

/* 添加文本按钮/导入按钮 (特殊处理，随主题变) */
.toolbar-item.add-text-btn {
    grid-column: span 4;
    width: calc(100% - 20px);
    height: auto;
    min-height: 54px;
    /* 统一高度 */
    background-color: var(--primary-color);
    color: white;
    font-size: 0.9rem;
    margin: 0 10px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    /* 左对齐 */
    padding: 8px 15px;
    /* 统一内边距 */
    border: 1px solid var(--border-color);
}

.toolbar-item.add-text-btn:hover {
    background-color: var(--primary-hover);
    transform: none;
    box-shadow: none;
    border-color: var(--primary-color);
}

.toolbar-item.add-text-btn.info-btn {
    background-color: var(--btn-info-bg);
    color: var(--text-main);
}

.toolbar-item.add-text-btn.info-btn:hover {
    background-color: var(--btn-info-hover);
}

/* 预置按钮样式 */
.toolbar-item.preset-btn {
    grid-column: span 4;
    width: calc(100% - 20px);
    height: auto;
    min-height: 54px;
    /* 统一高度 */
    background-color: var(--btn-info-bg);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: 8px 15px;
    margin: 0 10px;
    text-align: left;
    border: 1px solid var(--border-color);
}

.toolbar-item.preset-btn:hover {
    background-color: var(--btn-info-hover);
    transform: none;
    /* 覆盖通用的 hover 缩放，使其更像普通列表项 */
    box-shadow: none;
    border-color: var(--primary-color);
}

.preset-title {
    font-size: 0.85rem;
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 2px;
}

.preset-subtitle {
    font-size: 0.72rem;
    color: var(--text-light);
    line-height: 1.2;
    font-weight: normal;
}

/* 滚动条美化 */
.toolbar-items::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

.toolbar-items::-webkit-scrollbar-track {
    background: transparent;
}

.toolbar-items::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

.toolbar-items::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.3);
}

/* 4. 画板区域 (Canvas Area) */
.main-container {
    display: flex;
    flex: 1;
    min-height: 0;
    overflow: hidden;
    position: relative;
    background-color: var(--bg-color);
    /* 区域背景随主题变 (灰/黑) */
}

.canvas-area-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
    position: relative;
    background-color: var(--bg-color2);
}

.canvas-area {
    flex: 1;
    display: flex;
    align-items: center;
    padding: 20px;
    overflow-x: auto;
    width: 100%;
    scroll-behavior: smooth;
}

.canvas-area::-webkit-scrollbar {
    height: 8px;
}

.canvas-area::-webkit-scrollbar-track {
    background: transparent;
}

.canvas-area::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
}

/* --- [重要] 画布视觉保护 --- */
/* 画布代表物理标志牌，必须永远是深蓝色 */
.canvas {
    height: 150px;
    /* 使用动态背景色 */
    background-color: var(--mode-bg) !important;
    border-radius: 8px;
    display: flex;
    align-items: center;
    padding: 0 25px;
    transition: width 0.3s ease;
    flex-shrink: 0;
    margin: 0 auto;
    min-width: min-content;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    /* 增加阴影使其在深色模式下也能区分 */
    position: relative;
    /* 溢出阴影蒙板需要 */
    transition: width 0.3s ease, opacity 0.3s ease, border 0.3s ease;
}

.canvas.active {
    box-shadow: 0 5px 25px rgba(0, 160, 233, 0.4);
}

.canvas.frozen {
    opacity: 0.6;
    cursor: pointer;
}

.canvas.frozen * {
    pointer-events: none;
}

.canvas-container {
    display: flex;
    flex-direction: column;
    gap: 4px;
    align-items: center;
    width: fit-content;
    margin: 0 auto;
    /* 双层模式下的分割线颜色通过 gap 显示背景实现 */
    background-color: transparent;
}

.is-double-layer .canvas-container {
    padding: 0;
}

/* 溢出部分的阴影遮罩 */
.canvas::after {
    content: '';
    position: absolute;
    top: 0;
    left: var(--fixed-width, 100%);
    width: calc(100% - var(--fixed-width, 100%));
    height: 100%;
    background: rgba(0, 0, 0, 0.65);
    border-radius: 0 8px 8px 0;
    pointer-events: none;
    z-index: 50;
    opacity: 0;
    transition: opacity 0.3s ease;
    border-left: 2px dashed #ff4d4f;
}

.canvas.has-overflow::after {
    opacity: 1;
}

.canvas.empty {
    width: 50px;
    padding: 0;
}

.canvas-item {
    height: 150px;
    cursor: move;
    margin-right: 25px;
    position: relative;
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.canvas-item:last-child {
    margin-right: 0 !important;
}

.canvas-item img {
    height: 100%;
    width: auto;
}

.canvas-item:hover {
    transform: scale(1.05);
}

.canvas-item.active {
    outline: 3px solid #00A0E9;
    outline-offset: -4px;
    opacity: 0.9;
    border-radius: 4px;
}

.dragging {
    opacity: 0.5;
}

/* 5. 悬浮操作栏 (Float Action Bar) */
.float-action-bar {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: none;
    /* JS control */
    flex-direction: row;
    gap: 15px;
    z-index: 900;
}

/* 顶部悬浮操作栏 (Canvas Top Bar) */
.canvas-top-bar {
    position: absolute;
    top: calc(50% - 130px);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: row;
    gap: 15px;
    z-index: 900;
}

.is-double-layer .float-action-bar {
    bottom: 30px;
}

.is-double-layer .canvas-top-bar {
    top: calc(50% - 175px);
}

.is-double-layer .canvas-container {
    margin-top: 60px;
}

.btn-float-base {
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-float-base:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
    filter: brightness(1.1);
}

.btn-float-base:active {
    transform: translateY(1px);
}

/* 纠错按钮 (橙色保持不变) */
.btn-float-feedback {
    background-color: #eb9605;
}

/* 焕新按钮 (蓝色保持不变) */
.btn-float-refresh {
    background-color: #00A0E9;
}

/* 预留圆形按钮 */
.btn-float-circle {
    background-color: #00A0E9;
    padding: 0;
    width: 42px;
    /* 与 10px 24px padding + font-size 的高度匹配 */
    height: 42px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 清空按钮 */
.btn-float-clear {
    background-color: var(--diff-bg);
    color: var(--diff-text);
}

/* 尺寸选择按钮 */
.btn-float-primary {
    background-color: var(--primary-color);
    color: var(--btn-text);
}

/* 分组按钮 */
.btn-float-group {
    background-color: var(--btn-info-bg);
    color: var(--text-main);
}

/* Mode A/B 切换按钮 (圆形针锋相对的效果) */
.btn-float-mode {
    background-color: #00A0E9;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 2px solid #00A0E9;
    padding: 0;
    cursor: pointer;
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
    flex-shrink: 0;
}

.btn-float-mode:hover {
    transform: translateY(-2px) scale(1.1) rotate(15deg);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

.btn-float-mode:active {
    transform: translateY(1px);
}

/* 分组状态下的分割线按钮 */
.group-divider {
    position: absolute;
    top: 50%;
    transform: translate(50%, -50%);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: #28a745;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    z-index: 100;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
    transition: background-color 0.2s, transform 0.2s, width 0.2s, height 0.2s, border-radius 0.2s;
    transition-timing-function: cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.group-divider:hover {
    transform: translate(50%, -50%) scale(1.15);
    background-color: #34ce57;
}

.group-divider.divided {
    background-color: rgba(255, 255, 255, 0.4);
    width: 12px;
    height: 150px;
    border-radius: 0px;
}

.group-divider.divided:hover {
    background-color: rgba(255, 255, 255, 0.7);
    transform: translate(50%, -50%) scaleX(1.3);
}

/* 6. 右键菜单 (Context Menu) - 适配主题 */
.context-menu {
    position: fixed;
    background: var(--card-bg);
    /* 随主题 */
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    display: none;
    z-index: 1100;
    padding: 6px;
    min-width: 120px;
    color: var(--text-main);
}

.context-menu.show {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.menu-group-buttons {
    display: flex;
    justify-content: space-between;
    gap: 4px;
    padding: 0 4px;
}

.menu-group-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    padding: 6px;
    border-radius: 4px;
    transition: background-color 0.2s;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.menu-group-btn:hover:not(:disabled) {
    background-color: var(--btn-info-hover);
}

.menu-group-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

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

.menu-group-btn.selected:hover {
    background-color: var(--primary-color);
    filter: brightness(1.1);
}

.menu-separator {
    height: 1px;
    background-color: var(--border-color);
    margin: 2px 0;
}

.menu-item {
    padding: 8px 12px;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    color: var(--text-main);
    /* 随主题 */
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
}

/* 菜单项图标也需要适配颜色 */
.menu-icon svg {
    width: 1em;
    height: 1em;
    fill: currentColor;
    vertical-align: -0.15em;
    pointer-events: none;
}

.menu-item:hover {
    background-color: var(--btn-info-hover);
}

.remove-btn {
    color: #dc3545;
}

/* 7. 对话框 (Dialogs) - 适配主题 */
.text-dialog {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--card-bg);
    /* 随主题 */
    color: var(--text-main);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    width: 400px;
    max-width: 90vw;
    border: 1px solid var(--border-color);
}

.dialog-row {
    margin-bottom: 15px;
}

.dialog-row strong,
.dialog-row label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-main);
}

.dialog-row input[type="text"] {
    width: 100%;
    padding: 8px;
    background-color: var(--bg-color);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-top: 4px;
}

.dialog-buttons {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 16px;
}

.dialog-buttons button {
    padding: 6px 12px;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
}

#dialog-cancel {
    background-color: var(--btn-info-bg);
    color: var(--text-main);
}

#dialog-confirm {
    background-color: var(--primary-color);
    color: white;
}

/* 色板样式 */
.color-palette {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 8px;
}

.color-btn {
    aspect-ratio: 1;
    border-radius: 4px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: transform 0.2s;
}

[data-theme="dark"] .color-btn {
    border-color: rgba(255, 255, 255, 0.2);
    /* 深色模式下给色块加个淡边框 */
}

.color-btn:hover {
    transform: scale(1.1);
}

.color-btn.selected {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--primary-color);
}

/* 自定义颜色输入行 */
.custom-color-row {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.custom-color-input-container {
    flex: 1;
    display: flex;
    align-items: center;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 2px 8px;
}

.custom-color-input-container:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 160, 233, 0.2);
}

.custom-color-input {
    flex: 1;
    border: none !important;
    background: transparent !important;
    padding: 6px 4px !important;
    margin: 0 !important;
    font-family: monospace;
    font-size: 0.9rem;
    color: var(--text-main);
    outline: none;
}

.custom-color-preview {
    width: 20px;
    height: 20px;
    border-radius: 3px;
    border: 1px solid var(--border-color);
    flex-shrink: 0;
}

.custom-color-confirm-btn {
    padding: 8px 16px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: background-color 0.2s;
    white-space: nowrap;
}

.custom-color-confirm-btn:hover {
    background-color: var(--primary-hover);
}

/* 关闭按钮 */
.dialog-close-btn {
    position: absolute;
    top: 10px;
    right: 15px;
    background: none;
    border: none;
    font-size: 1.5rem;
    line-height: 1;
    color: #999;
    cursor: pointer;
    padding: 0;
    z-index: 10;
}

.dialog-close-btn:hover {
    color: var(--text-main);
}

/* 7.5 纵向分栏准备区 (Column Layout Staging Area) */
.column-layout-overlay {
    width: 600px !important;
    max-width: 95vw !important;
}

.column-layout-header {
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.column-layout-header h3 {
    margin-bottom: 5px;
}

.cl-instruction {
    font-size: 0.9em;
    color: var(--primary-color);
    font-weight: bold;
}

.cl-staging-area {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 20px;
}

.cl-row-label {
    font-size: 0.8em;
    color: var(--text-light);
    margin-bottom: 5px;
    margin-top: 10px;
}

.cl-row-label:first-child {
    margin-top: 0;
}

.cl-row {
    min-height: 60px;
    background: var(--mode-bg);
    border-radius: 6px;
    display: flex;
    align-items: center;
    padding: 10px;
    gap: 10px;
    overflow-x: auto;
    border: 2px dashed transparent;
    transition: all 0.2s;
}

.cl-row:not(.active) {
    opacity: 0.6;
    cursor: pointer;
    background-color: var(--mode-bg) !important;
}

.cl-row:not(.active) * {
    pointer-events: none;
}

.cl-row.active {
    background-color: var(--mode-bg) !important;
    border: 2px solid #00A0E9;
    box-shadow: 0 0 15px rgba(0, 160, 233, 0.4);
    opacity: 1;
}

.cl-row.disabled {
    display: none;
    /* 移除旧的 disabled 逻辑 */
}

.cl-item-wrapper {
    position: relative;
    cursor: pointer;
    border: 1px solid transparent;
    border-radius: 4px;
    padding: 2px;
}

.cl-item-wrapper:hover,
.cl-item-wrapper.active {
    border-color: var(--primary-color);
    background: rgba(0, 160, 233, 0.1);
}

.cl-item-wrapper.active {
    outline: 2px solid var(--primary-color);
    outline-offset: -2px;
}

.cl-item-wrapper.dragging {
    opacity: 0.4;
}

/* 8. 智能版文字特效 (Smart Badge) */
.smart-badge {
    background: linear-gradient(to top, #866bc4, #b57dc7);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-size: 0.85em;
    margin-left: 4px;
    font-weight: bold;
}

/* --- 下拉菜单样式 (Dropdown) --- */
.dropdown {
    position: relative;
    display: inline-block;
    vertical-align: middle;
}

.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    top: 100%;
    background-color: var(--card-bg, #ffffff);
    min-width: 170px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
    z-index: 10001;
    border-radius: 8px;
    overflow: visible;
    margin-top: 8px;
    border: 1px solid var(--border-color, #eee);
}

.dropdown-content::before {
    content: "";
    position: absolute;
    top: -10px;
    left: 0;
    width: 100%;
    height: 10px;
    background: transparent;
}

.dropdown-content a {
    color: var(--text-main, #333);
    padding: 12px 16px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    transition: background 0.2s;
    text-align: left;
}

.dropdown-content a .btn-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.dropdown-content a:first-child {
    border-radius: 8px 8px 0 0;
}

.dropdown-content a:last-child {
    border-radius: 0 0 8px 8px;
}

.dropdown-content a:hover {
    background-color: var(--btn-info-hover, #f5f5f7);
}

.dropdown-content.show {
    display: block;
}

/* 9. 帮助中心样式 (Help Center - 兼容 tool-style) */
.help-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9990;
    backdrop-filter: blur(3px);
    opacity: 0;
    transition: opacity 0.2s;
}

.text-dialog.help-dialog {
    z-index: 10000 !important;
    display: flex;
    flex-direction: column;
    padding: 0;
    width: 90%;
    max-width: 450px;
    border-radius: 12px;
    overflow: hidden;
    opacity: 0;
    transform: translate(-50%, -45%);
    transition: all 0.2s ease-out;
}

.help-container {
    padding: 0 25px 25px 25px;
    text-align: left;
    overflow-y: auto;
    max-height: 70vh;
}

.help-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    padding: 25px 0 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.help-icon-img {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    object-fit: contain;
}

.help-title-group p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-light);
}

.help-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 15px;
}

.help-card {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.help-card-icon {
    font-size: 24px;
    margin-bottom: 8px;
}

.help-card h4 {
    margin: 0 0 5px 0;
    font-size: 13px;
    color: var(--text-main);
    font-weight: bold;
}

.help-card ul {
    margin: 0;
    padding-left: 12px;
    font-size: 11px;
    color: var(--text-light);
    line-height: 1.5;
}

.help-data-info {
    background-color: #fff3cd;
    border: 1px solid #ffeeba;
    color: #856404;
    padding: 12px;
    border-radius: 8px;
    font-size: 12px;
    margin-bottom: 20px;
    line-height: 1.5;
}

[data-theme="dark"] .help-data-info {
    background-color: #3e3312;
    border-color: #584610;
    color: #ffd970;
}

.help-data-info2 {
    margin-bottom: 20px;
    padding: 12px;
    border-radius: 8px;
    font-size: 12px;
    line-height: 1.5;
}

.help-action-btn {
    flex: 1;
    padding: 10px;
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    font-size: 0.9rem;
    border: 1px solid transparent;
    transition: all 0.2s;
}

.help-action-btn.primary {
    background-color: var(--primary-color);
    color: white;
}

.help-action-btn.secondary {
    background-color: var(--bg-color);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.help-action-btn.secondary:hover {
    background-color: var(--btn-info-hover);
}

/* 10. 响应式适配 */

@media (min-width: 961px) {
    .toolbar-panel {
        width: 300px;
    }

    .toolbar-items {
        grid-template-columns: repeat(4, 60px);
        justify-content: space-around;
    }
}

@media (max-width: 960px) {
    .tool-header .btn span {
        display: none;
    }

    .tool-header .btn {
        padding: 6px 10px;
    }

    .tool-header .btn-icon {
        margin-right: 0;
    }

    .main-container {
        flex-direction: column;
    }

    .toolbar-panel {
        width: 100%;
        height: auto;
        max-height: 35vh;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .toolbar-tabs {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 5px;
    }

    .toolbar-tab {
        margin-bottom: 0;
        margin-right: 4px;
    }

    .toolbar-items {
        justify-content: start;
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }

    .canvas-area {
        padding: 15px;
    }

    .float-action-bar {
        left: 50%;
        bottom: 15px;
        width: 90%;
        justify-content: center;
        gap: 10px;
    }

    .btn-float-base {
        padding: 8px 16px;
        font-size: 0.85rem;
    }

    .canvas-top-bar {
        left: 50%;
        top: calc(50% - 130px);
        width: 90%;
        justify-content: center;
        gap: 10px;
    }

    /* 对话框适配：底端贴合样式 (Bottom Sheet) */
    .text-dialog {
        top: auto;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 100vw;
        max-width: 100vw;
        max-height: 70vh;
        overflow-y: auto;
        padding: 20px;
        border-radius: 20px 20px 0 0;
        border-bottom: none;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.2);
    }

    .column-layout-overlay {
        width: 100vw !important;
        max-width: 100vw !important;
        top: auto;
        bottom: 0;
        transform: translateX(-50%);
        border-radius: 20px 20px 0 0;
    }

    .cl-staging-area {
        padding: 12px;
        margin-bottom: 20px;
    }

    .cl-row {
        min-height: 50px;
        padding: 5px;
    }

    .column-layout-header {
        margin-bottom: 10px;
        padding-bottom: 5px;
    }
}

@media (max-width: 720px) {
    .canvas-top-bar {
        top: calc(78% + 0px);
    }

    .is-double-layer .canvas-top-bar {
        top: calc(78% + 0px);
    }

    .float-action-bar {
        bottom: 20px;
    }

    .canvas-container {
        transform: scale(0.8);
        transform-origin: center top;
    }

    @media (max-height: 960px) {
        .canvas-container {
            transform: scale(0.7);
            transform-origin: center top;
        }

        .canvas-top-bar {
            top: calc(75% + 0px);
        }

        .is-double-layer .canvas-top-bar {
            top: calc(75% + 0px);
        }
    }

    @media (max-height: 900px) {
        .canvas-container {
            transform: scale(0.5);
            transform-origin: center top;
        }

        .canvas-top-bar {
            top: calc(70% + 0px);
        }

        .is-double-layer .canvas-top-bar {
            top: calc(70% + 0px);
        }
    }

    @media (max-height: 780px) {
        .canvas-top-bar {
            top: calc(65% + 0px);
        }

        .is-double-layer .canvas-top-bar {
            top: calc(65% + 0px);
        }
    }

    @media (max-height: 700px) {
        .canvas-container {
            transform: scale(0.45);
            transform-origin: center top;
        }

        .canvas-top-bar {
            top: calc(61% + 0px);
        }

        .is-double-layer .canvas-top-bar {
            top: calc(61% + 0px);
        }
    }
}

@media (max-width: 600px) {

    /* 1. 容器转为 Grid */
    .tool-header {
        display: grid;
        grid-template-columns: auto 1fr auto;
        grid-template-areas:
            "nav brand system"
            "actions actions actions";
        /* 第二行全宽 */
        padding: 5px 10px;
        gap: 0;
        /* 垂直间距由 padding 控制 */
        height: auto;
        /* 自适应高度 */
        align-items: center;
    }

    /* 2. 区域分配 */
    .header-left {
        grid-area: nav;
    }

    /* 中间 Logo 区域 */
    .header-center {
        grid-area: brand;
        justify-content: center;
        display: flex;
    }

    /* 隐藏标题文字 */

    /* 右侧容器解散，让子元素直接参与 Grid */
    .header-right {
        display: contents;
    }

    .header-system {
        grid-area: system;
        justify-self: end;
        /* 靠右对齐 */
        gap: 4px;
    }

    /* 3. 第二行操作栏 */
    .header-actions {
        grid-area: actions;
        display: flex;
        justify-content: space-between;
        /* 关键：左-中-右 */
        align-items: center;
        width: 100%;
        margin-top: 8px;
        padding-top: 8px;
        border-top: 1px solid var(--border-color);
        /* 分隔线 */
    }

    /* 4. 强制显示第二行的文字 */
    .header-actions .btn span {
        /*  display: inline !important; /* 覆盖 870px 的规则 */
        font-size: 0.85rem;
    }

    /* .header-actions .btn-icon {
         margin-right: 4px !important;
    }*/

    /* 5. 按钮微调 */
    .header-actions .btn {
        padding: 6px 10px;
        flex: 0 0 auto;
        /* 防止被压缩 */
    }

    /* 导出组紧凑排列 */
    .export-group {
        gap: 4px;
    }

    /* 隐藏不必要的元素 */
    #camera-input {
        display: none;
    }
}

@media (max-width: 389px) {

    /* 隐藏文字标签 */
    .btn-float-clear span,
    .btn-float-group span,
    .btn-float-feedback span,
    .btn-float-refresh span {
        display: none;
    }

    /* 去除图标间距 */
    .btn-float-clear svg,
    .btn-float-group svg,
    .btn-float-feedback svg,
    .btn-float-refresh svg {
        margin-right: 0 !important;
    }

    .btn-float-base {
        padding: 8px 12px;
    }
}