* { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: sans-serif;
            background-color: #f4f4f4;
            height: 100vh;
            overflow: hidden;
        }
        .container {
            background-color: #fff;
            height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* 顶部工具栏 */
        .toolbar {
            padding: 8px 12px;
            background-color: #f8f9fa;
            border-bottom: 1px solid #ddd;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: nowrap;
            flex-shrink: 0;
            position: relative;
            z-index: 10;
            white-space: nowrap;
        }

        .toolbar h1 {
            font-size: 16px;
            margin: 0;
            color: #333;
            font-weight: 600;
            flex-shrink: 0;
        }

        .toolbar-left,
        .toolbar-center,
        .toolbar-right {
            display: flex;
            align-items: center;
            gap: 10px;
            min-width: 0;
        }

        .toolbar-left {
            flex: 0 1 auto;
        }

        .toolbar-center {
            flex: 1 1 auto;
            justify-content: center;
            gap: 8px;
        }

        .toolbar-right {
            flex: 0 0 auto;
            gap: 8px;
        }

        .toolbar-group {
            display: flex;
            align-items: center;
            gap: 6px;
            min-width: 0;
        }

        /* GitHub 链接样式 */
        .github-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 8px;
            background-color: #24292e;
            color: #fff;
            text-decoration: none;
            border-radius: 4px;
            font-size: 12px;
            transition: background-color 0.2s;
        }

        .github-link:hover {
            background-color: #0366d6;
        }

        .github-link svg {
            width: 16px;
            height: 16px;
            fill: currentColor;
        }

        .star-button {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 8px;
            background-color: #fafbfc;
            color: #24292e;
            border: 1px solid #e1e4e8;
            text-decoration: none;
            border-radius: 4px;
            font-size: 12px;
            transition: all 0.2s;
        }

        .star-button:hover {
            background-color: #f3f4f6;
            border-color: #d1d5da;
        }

        .star-button svg {
            width: 14px;
            height: 14px;
            fill: currentColor;
        }

        .compact-link span {
            display: none;
        }

        .compact-link {
            opacity: 0.78;
        }

        .compact-link:hover {
            opacity: 1;
        }

        /* 编辑器和预览区域的容器 */
        .editor-preview-container {
            display: flex;
            flex-direction: column;
            gap: 0;
            flex: 1;
            overflow: hidden;
        }

        /* 在屏幕宽度足够时，使用左右布局 */
        @media (min-width: 1024px) {
            .editor-preview-container {
                flex-direction: row;
            }

            .editor-wrapper,
            .preview-wrapper {
                flex: 1;
                min-width: 0;
            }
        }

        .editor-wrapper,
        .preview-wrapper {
            display: flex;
            flex-direction: column;
            overflow: hidden;
            min-height: 0;
        }

        .section-header {
            padding: 8px 15px;
            background-color: #e9ecef;
            border-bottom: 1px solid #ddd;
            font-size: 14px;
            font-weight: bold;
            color: #495057;
            flex-shrink: 0;
        }

        textarea#combinedContentInput {
            width: 100%;
            flex: 1;
            padding: 15px;
            border: none;
            border-right: 1px solid #ddd;
            font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
            font-size: 14px;
            line-height: 1.6;
            resize: none;
            overflow-y: auto;
            box-sizing: border-box;
            background-color: #fff;
        }

        textarea#combinedContentInput:focus {
            outline: none;
        }

        button {
            padding: 6px 12px;
            background-color: #007bff;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 13px;
            transition: background-color 0.2s;
        }
        button:hover { background-color: #0056b3; }
        button:disabled { background-color: #ccc; cursor: not-allowed; }
        .primary-button {
            background-color: #0066d6;
            font-weight: 600;
            box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
        }

        .primary-button:hover {
            background-color: #0053ad;
        }

        .secondary-button {
            background-color: #eef2f7;
            color: #1f2937;
            border: 1px solid #cdd6e1;
            box-shadow: none;
        }

        .secondary-button:hover {
            background-color: #e5ebf3;
            color: #111827;
        }

        /* 打印按钮图标（避免被 i18n 文本覆盖） */
        #printPreviewButton::before {
            content: "🖨️";
            margin-right: 4px;
        }

        #printPreviewButtonMobile::before {
            content: "🖨️";
            margin-right: 6px;
        }

        .secondary-button:disabled {
            background-color: #f3f4f6;
            color: #9ca3af;
            border-color: #e5e7eb;
            cursor: not-allowed;
        }

        .toolbar-view-mode-controls {
            border: 1px solid #d1d5db;
            border-radius: 6px;
            overflow: hidden;
            gap: 0;
        }

        .view-mode-button {
            border-radius: 0;
            border: none;
            border-right: 1px solid #d1d5db;
            padding: 5px 9px;
            font-size: 12px;
            background-color: #f3f4f6;
            color: #374151;
        }

        .view-mode-button:last-child {
            border-right: none;
        }

        .view-mode-button.active {
            background-color: #2563eb;
            color: #fff;
        }

        .view-mode-button:hover {
            background-color: #e5e7eb;
        }

        .view-mode-button.active:hover {
            background-color: #1d4ed8;
        }

        .toolbar-lang-group select {
            min-width: 96px;
            font-size: 12px;
            padding: 4px 6px;
        }

        .editor-preview-container[data-view-mode="editor-only"] .preview-wrapper,
        .editor-preview-container[data-view-mode="editor-only"] .split-divider {
            display: none;
        }

        .editor-preview-container[data-view-mode="preview-only"] .editor-wrapper,
        .editor-preview-container[data-view-mode="preview-only"] .split-divider {
            display: none;
        }

        .editor-preview-container[data-view-mode="editor-only"] .editor-wrapper,
        .editor-preview-container[data-view-mode="preview-only"] .preview-wrapper {
            flex: 1 1 auto;
            width: 100%;
        }

        .split-divider {
            display: none;
            width: 8px;
            flex: 0 0 8px;
            cursor: col-resize;
            position: relative;
            background: transparent;
            user-select: none;
        }

        .split-divider::before {
            content: "";
            position: absolute;
            left: 3px;
            top: 0;
            bottom: 0;
            width: 2px;
            background-color: #d1d5db;
            transition: background-color 0.15s ease;
        }

        .split-divider:hover::before,
        .editor-preview-container.resizing .split-divider::before {
            background-color: #60a5fa;
        }

        .editor-preview-container.resizing,
        .editor-preview-container.resizing * {
            cursor: col-resize !important;
        }

        .toolbar-progress-line {
            height: 2px;
            width: 100%;
            background: linear-gradient(90deg, #2f7ae5, #60a5fa, #2f7ae5);
            background-size: 200% 100%;
            opacity: 0;
            transform: scaleX(0);
            transform-origin: left;
            transition: opacity 0.15s ease, transform 0.2s ease;
            pointer-events: none;
        }

        .toolbar-progress-line.active {
            opacity: 1;
            transform: scaleX(1);
            animation: toolbarProgressShimmer 1.2s linear infinite;
        }

        @keyframes toolbarProgressShimmer {
            0% { background-position: 0% 50%; }
            100% { background-position: 200% 50%; }
        }

        .status-sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        .toast-container {
            position: fixed;
            top: 12px;
            right: 12px;
            z-index: 9999;
            display: flex;
            flex-direction: column;
            gap: 8px;
            pointer-events: none;
            max-width: min(420px, calc(100vw - 24px));
        }

        .toast {
            pointer-events: auto;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 10px;
            border-radius: 6px;
            border: 1px solid;
            font-size: 12px;
            line-height: 1.4;
            box-shadow: 0 8px 18px rgba(0, 0, 0, 0.12);
            background-color: #fff;
            color: #1f2937;
            opacity: 0;
            transform: translateY(-6px);
            transition: opacity 0.18s ease, transform 0.18s ease;
        }

        .toast.show {
            opacity: 1;
            transform: translateY(0);
        }

        .toast-info {
            border-color: #93c5fd;
            background-color: #eff6ff;
            color: #1d4ed8;
        }

        .toast-success {
            border-color: #86efac;
            background-color: #f0fdf4;
            color: #166534;
        }

        .toast-error {
            border-color: #fca5a5;
            background-color: #fef2f2;
            color: #991b1b;
        }

        .toast-close {
            margin-left: auto;
            border: none;
            background: transparent;
            color: inherit;
            font-size: 14px;
            line-height: 1;
            cursor: pointer;
            padding: 0 2px;
        }

        @media (max-width: 768px) {
            .toast-container {
                top: auto;
                bottom: 12px;
                left: 12px;
                right: 12px;
                max-width: none;
            }
        }
        .error-message {
            color: red;
            font-family: monospace;
            white-space: pre-wrap;
            text-align: left;
            background-color: #ffebeb;
            border: 1px solid #ffc0c0;
            padding: 10px;
            margin: 5px;
        }
        label {
            margin-right: 5px;
            font-size: 13px;
            color: #495057;
        }
        select {
            padding: 4px 8px;
            border-radius: 4px;
            border: 1px solid #ccc;
            font-size: 13px;
            background-color: white;
            max-width: 210px;
        }

        #fontPicker {
            min-width: 150px;
        }

        @media (max-width: 1200px) {
            .toolbar h1 {
                font-size: 15px;
            }

            #fontPicker {
                min-width: 130px;
                max-width: 170px;
            }

            .toolbar-center {
                justify-content: flex-start;
            }
        }

        /* ===== 窄屏工具栏 (< 1024px) ===== */
        @media (max-width: 1023px) {
            .editor-preview-container[data-view-mode="split"] .editor-wrapper,
            .editor-preview-container[data-view-mode="split"] .preview-wrapper {
                flex: 1 1 0;
                min-height: 0;
            }

            .editor-preview-container[data-view-mode="split"] .editor-wrapper {
                min-height: 180px;
            }

            .editor-preview-container[data-view-mode="split"] .preview-wrapper {
                min-height: 200px;
            }

            .editor-preview-container[data-view-mode="split"].narrow-split-emergency .editor-wrapper {
                min-height: 140px;
            }

            .editor-preview-container[data-view-mode="split"].narrow-split-emergency .preview-wrapper {
                min-height: 150px;
            }

            .toolbar {
                flex-wrap: wrap;
                padding: 8px 10px;
                gap: 6px;
            }

            .toolbar h1 {
                font-size: 14px;
                flex: 1 1 100%;
                margin-bottom: 4px;
                text-align: center;
            }

            .toolbar-left,
            .toolbar-center,
            .toolbar-right {
                flex-wrap: wrap;
                justify-content: center;
            }

            .toolbar-left {
                flex: 0 0 auto;
                margin-bottom: 0;
            }

            .toolbar-center {
                flex: 1 1 auto;
                justify-content: center;
                gap: 4px;
            }

            .toolbar-right {
                flex: 0 0 auto;
            }

            .toolbar-group {
                gap: 4px;
            }

            .toolbar-group label {
                display: none;
            }

            #fontPicker {
                min-width: 100px;
                max-width: 130px;
                font-size: 12px;
                padding: 3px 6px;
            }

            button {
                padding: 4px 8px;
                font-size: 12px;
            }

            .secondary-button {
                padding: 4px 8px;
                font-size: 12px;
            }

            .primary-button {
                padding: 6px 12px;
                font-size: 13px;
            }

            .toolbar-view-mode-controls {
                gap: 3px;
            }

            .toolbar-view-mode-controls button {
                padding: 3px 6px;
                font-size: 11px;
            }

            .desktop-only {
                display: none;
            }

            .toolbar-lang-group {
                display: none;
            }

            .toolbar-actions {
                gap: 6px;
            }

            /* 更多菜单样式 */
            .toolbar-more-menu {
                position: relative;
            }

            .toolbar-more-trigger {
                display: flex;
                align-items: center;
                gap: 4px;
                padding: 4px 8px;
                cursor: pointer;
                border: 1px solid #ccc;
                border-radius: 4px;
                background: #fff;
                font-size: 12px;
                color: #333;
            }

            .toolbar-more-trigger:hover {
                background: #f0f0f0;
            }

            .toolbar-more-dropdown {
                display: none;
                position: absolute;
                top: 100%;
                right: 0;
                margin-top: 4px;
                background: #fff;
                border: 1px solid #ddd;
                border-radius: 6px;
                box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
                padding: 8px;
                min-width: 160px;
                z-index: 1000;
            }

            .toolbar-more-menu[open] .toolbar-more-dropdown {
                display: block;
            }

            .toolbar-more-dropdown .toolbar-group {
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
            }

            .toolbar-more-dropdown .toolbar-actions-mobile {
                flex-direction: column;
                gap: 4px;
                padding-bottom: 6px;
                border-bottom: 1px solid #eee;
                margin-bottom: 6px;
            }

            .toolbar-more-dropdown .toolbar-actions-mobile button,
            .toolbar-more-dropdown .toolbar-links-mobile a {
                display: flex;
                align-items: center;
                gap: 8px;
                width: 100%;
                text-align: left;
                padding: 8px 10px;
                font-size: 13px;
                border: none;
                background: transparent;
                color: #1f2937;
                border-radius: 4px;
                cursor: pointer;
                text-decoration: none;
            }

            .toolbar-more-dropdown .toolbar-actions-mobile button:hover,
            .toolbar-more-dropdown .toolbar-links-mobile a:hover {
                background: #eef2f7;
                color: #111827;
            }

            .toolbar-more-dropdown .toolbar-actions-mobile button svg,
            .toolbar-more-dropdown .toolbar-links-mobile a svg {
                flex-shrink: 0;
            }

            .toolbar-more-dropdown .toolbar-lang-group-mobile {
                display: flex;
                align-items: center;
                padding: 8px 10px;
            }

            .toolbar-more-dropdown .toolbar-lang-group-mobile label {
                display: flex;
                align-items: center;
                gap: 8px;
                width: 100%;
            }

            .toolbar-more-dropdown .toolbar-lang-group-mobile svg {
                flex-shrink: 0;
            }

            .toolbar-more-dropdown .toolbar-lang-group-mobile select {
                flex: 1;
                padding: 6px 8px;
                font-size: 13px;
                border: 1px solid #cdd6e1;
                border-radius: 4px;
                background: #fff;
            }

            .toolbar-more-text {
                display: inline;
            }
        }

        /* 桌面端隐藏更多菜单 */
        @media (min-width: 1024px) {
            .toolbar-more-menu {
                display: none;
            }

            .toolbar-links-mobile,
            .toolbar-lang-group-mobile,
            .toolbar-actions-mobile {
                display: none;
            }

            .toolbar-links {
                display: flex;
            }
        }

            /* 更多菜单样式 */
            .toolbar-more-menu {
                position: relative;
            }

            .toolbar-more-trigger {
                display: flex;
                align-items: center;
                gap: 4px;
                padding: 4px 8px;
                cursor: pointer;
                border: 1px solid #ccc;
                border-radius: 4px;
                background: #fff;
                font-size: 12px;
                color: #333;
            }

            .toolbar-more-trigger:hover {
                background: #f0f0f0;
            }

            .toolbar-more-dropdown {
                display: none;
                position: absolute;
                top: 100%;
                right: 0;
                margin-top: 4px;
                background: #fff;
                border: 1px solid #ddd;
                border-radius: 6px;
                box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
                padding: 8px;
                min-width: 140px;
                z-index: 1000;
            }

            .toolbar-more-menu[open] .toolbar-more-dropdown {
                display: block;
            }

            .toolbar-more-dropdown .toolbar-group {
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
            }

            .toolbar-more-dropdown .toolbar-links-mobile a {
                display: flex;
                align-items: center;
                gap: 6px;
                padding: 6px 10px;
                text-decoration: none;
                border-radius: 4px;
                font-size: 12px;
            }

            .toolbar-more-dropdown .toolbar-links-mobile a:hover {
                background: #f5f5f5;
            }

            .toolbar-more-dropdown .toolbar-lang-group-mobile select {
                width: 100%;
                padding: 6px 8px;
                font-size: 12px;
            }

            .toolbar-more-text {
                display: inline;
            }
        }

        /* ===== 极窄屏 (< 480px) ===== */
        @media (max-width: 480px) {
            .toolbar {
                padding: 6px 8px;
                gap: 4px;
            }

            .toolbar h1 {
                font-size: 13px;
            }

            .toolbar-center {
                gap: 3px;
            }

            .toolbar-group label {
                display: none;
            }

            #fontPicker {
                min-width: 80px;
                max-width: 100px;
                font-size: 11px;
                padding: 2px 4px;
            }

            button {
                padding: 3px 6px;
                font-size: 11px;
            }

            .secondary-button {
                padding: 3px 5px;
                font-size: 10px;
            }

            .primary-button {
                padding: 4px 8px;
                font-size: 11px;
            }

            .toolbar-view-mode-controls button {
                padding: 2px 4px;
                font-size: 10px;
            }

            .toolbar-more-trigger {
                padding: 3px 6px;
                font-size: 11px;
            }

            .toolbar-more-text {
                display: none;
            }
        }

        /* 桌面端隐藏更多菜单 */
        @media (min-width: 1024px) {
            .toolbar-more-menu {
                display: none;
            }

            .toolbar-links-mobile,
            .toolbar-lang-group-mobile {
                display: none;
            }

            .toolbar-links {
                display: flex;
            }
        }

        @media (min-width: 1024px) {
            .editor-preview-container[data-view-mode="split"] {
                flex-direction: row;
            }

            .editor-preview-container[data-view-mode="split"] .editor-wrapper,
            .editor-preview-container[data-view-mode="split"] .preview-wrapper {
                min-width: 0;
                flex-grow: 0;
                flex-shrink: 0;
            }

            .editor-preview-container[data-view-mode="split"] .split-divider {
                display: block;
            }
        }

        #documentPreview {
            padding: 15px;
            border: none;
            background-color: #f9f9f9;
            flex: 1;
            line-height: 1.6;
            overflow-y: auto;
            box-sizing: border-box;
            position: relative; /* 确保子元素 offsetTop 相对于此容器 */
        }
        #documentPreview .markdown-preview-segment h1 { font-size: 18pt; font-weight: bold; }
        #documentPreview .markdown-preview-segment h2 { font-size: 14pt; font-weight: bold; }
        #documentPreview .markdown-preview-segment h3 { font-size: 12pt; font-weight: bold; }
        #documentPreview .markdown-preview-segment h4 { font-size: 12pt; font-style: italic; font-weight: normal; }
        #documentPreview .markdown-preview-segment h5,
        #documentPreview .markdown-preview-segment h6 {
            margin-top: 0.8em; margin-bottom: 0.4em; line-height: 1.2; font-weight: bold;
        }
        #documentPreview .markdown-preview-segment p,
        #documentPreview .markdown-preview-segment li,
        #documentPreview .markdown-preview-segment td,
        #documentPreview .markdown-preview-segment th {
             font-size: 10pt;
        }
        #documentPreview .markdown-preview-segment code { /* Inline code preview */
            font-family: monospace;
            background-color: #f0f0f0;
            padding: 2px 4px;
            border-radius: 3px;
        }
        #documentPreview .markdown-preview-segment pre code { /* Code block preview */
            display: block;
            padding: 10px;
            background-color: #f0f0f0;
            border-radius: 4px;
            white-space: pre-wrap; /* Ensure wrapping in preview */
        }
        #documentPreview .markdown-preview-segment table {
            border-collapse: collapse;
            margin-bottom: 1em;
            width: auto; /* Or width: 100% if you want full-width tables */
        }
        #documentPreview .markdown-preview-segment th,
        #documentPreview .markdown-preview-segment td {
            border: 1px solid #ccc;
            padding: 6px 10px;
            text-align: left;
        }
        #documentPreview .markdown-preview-segment th {
            background-color: #f0f0f0;
            font-weight: bold;
        }
         #documentPreview .markdown-preview-segment hr {
            border: 0;
            border-top: 1px solid #ccc;
            margin: 1em 0;
        }


        #documentPreview .mermaid-preview-segment svg {
            max-width: 100%;
            height: auto;
            border: 1px solid #ddd;
            display: block;
            margin: 15px auto;
            background-color: white;
            padding: 10px;
            box-sizing: border-box;
        }

        /* 甘特图时间轴刻度标签字体大小 - 加大一倍 */
        #documentPreview .mermaid-preview-segment svg .tick text {
            font-size: 20px !important;  /* 时间轴刻度标签字体大小加倍 (默认约10px) */
        }

        /* ===== 主题配置 UI 样式 ===== */
        #customThemeButton {
            padding: 6px 10px;
            font-size: 14px;
            cursor: pointer;
            background-color: #eef2f7;
            color: #1f2937;
            border: 1px solid #cdd6e1;
            border-radius: 4px;
        }

        #customThemeButton:hover {
            background-color: #e5ebf3;
            color: #111827;
        }

        /* ASCII 输出显示样式 */
        .ascii-preview-segment {
            position: relative;
            background: #f9f9f9;
            border: 1px solid #ddd;
            border-radius: 4px;
            margin: 15px auto;
            padding: 10px;
            max-width: 100%;
            overflow-x: auto;
        }

        .ascii-preview-segment pre {
            font-family: 'Courier New', 'Consolas', monospace;
            font-size: 12px;
            line-height: 1.3;
            margin: 0;
            white-space: pre;
        }

        .ascii-preview-segment .copy-ascii-btn {
            position: absolute;
            top: 5px;
            right: 5px;
            padding: 4px 8px;
            font-size: 11px;
            background-color: #fff;
            border: 1px solid #ccc;
            border-radius: 3px;
            cursor: pointer;
        }

        .ascii-preview-segment .copy-ascii-btn:hover {
            background-color: #f0f0f0;
        }

        /* 自定义主题模态框样式 */
        .modal {
            display: none;
            position: fixed;
            z-index: 1000;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            overflow: auto;
        }

        /* 避免自定义主题弹窗被 Mermaid 配置弹窗压住 */
        #mermaidConfigModal {
            z-index: 1200;
        }

        #customThemeModal {
            z-index: 1300;
        }

        .modal-content {
            background-color: #fefefe;
            margin: 5% auto;
            padding: 20px;
            border: 1px solid #888;
            border-radius: 8px;
            width: 90%;
            max-width: 600px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #ddd;
        }

        .modal-header h2 {
            margin: 0;
            font-size: 20px;
        }

        .close-modal {
            font-size: 28px;
            font-weight: bold;
            color: #aaa;
            cursor: pointer;
            line-height: 1;
        }

        .close-modal:hover {
            color: #000;
        }

        .modal-body {
            margin-bottom: 20px;
        }

        .color-input-group {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 15px;
        }

        .color-input-group label {
            min-width: 100px;
            font-weight: 500;
        }

        .color-input-group input[type="color"] {
            width: 50px;
            height: 35px;
            border: 1px solid #ccc;
            border-radius: 4px;
            cursor: pointer;
        }

        .color-input-group input[type="text"] {
            flex: 1;
            padding: 6px 10px;
            border: 1px solid #ccc;
            border-radius: 4px;
            font-family: monospace;
        }

        .modal-footer {
            display: flex;
            gap: 10px;
            justify-content: flex-end;
            padding-top: 15px;
            border-top: 1px solid #ddd;
        }

        .modal-footer button {
            padding: 8px 16px;
            border: 1px solid #ccc;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
        }

        .modal-footer button.primary {
            background-color: #007bff;
            color: white;
            border-color: #007bff;
        }

        .modal-footer button.primary:hover {
            background-color: #0056b3;
        }

        .optional-colors {
            margin-top: 20px;
            padding-top: 15px;
            border-top: 1px solid #eee;
        }

        .optional-colors-header {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 15px;
        }

        .optional-colors-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .optional-colors-content.show {
            max-height: 500px;
        }

        /* Mermaid 配置模态框特定样式 */
        #mermaidConfigModal .modal-content {
            max-width: 700px;
        }

        #mermaidConfigButton,
        #mermaidConfigButtonMobile {
            padding: 6px 12px;
            font-size: 14px;
            cursor: pointer;
            background-color: #eef2f7;
            color: #1f2937;
            border: 1px solid #cdd6e1;
            border-radius: 4px;
        }

        #mermaidConfigButton:hover,
        #mermaidConfigButtonMobile:hover {
            background-color: #e5ebf3;
            color: #111827;
        }

        .config-section {
            margin-bottom: 25px;
            padding: 15px;
            background-color: #f9f9f9;
            border-radius: 6px;
            border: 1px solid #e0e0e0;
        }

        .config-section h3 {
            margin: 0 0 15px 0;
            font-size: 16px;
            color: #333;
            border-bottom: 2px solid #ddd;
            padding-bottom: 8px;
        }

        .config-hint {
            margin: 10px 0 0 0;
            font-size: 13px;
            color: #666;
            font-style: italic;
        }

        .output-mode-help {
            background-color: #fff;
            padding: 12px;
            border-radius: 4px;
            border: 1px solid #ddd;
        }

        .output-mode-help h4 {
            margin: 0 0 10px 0;
            font-size: 14px;
            color: #555;
        }

        .output-mode-help ul {
            margin: 0;
            padding-left: 20px;
        }

        .output-mode-help li {
            margin-bottom: 8px;
            font-size: 13px;
            line-height: 1.5;
        }

        .output-mode-help li strong {
            color: #333;
        }

        /* ===== 数学公式样式 ===== */
        
        /* 行内数学公式 */
        .math-inline {
            display: inline-block;
            vertical-align: middle;
            margin: 0 2px;
        }
        
        .math-inline svg {
            display: inline;
            vertical-align: middle;
        }
        
        /* 块级数学公式 */
        .math-display-segment {
            display: block;
            text-align: center;
            margin: 20px 0;
            padding: 15px;
            overflow-x: auto;
        }
        
        .math-display-segment svg {
            display: block;
            margin: 0 auto;
            max-width: 100%;
            height: auto;
        }
        
        /* 数学公式错误样式 */
        .math-error {
            color: #d32f2f;
            background-color: #ffebee;
            padding: 2px 4px;
            border-radius: 3px;
            font-family: monospace;
        }