.theme-toggle {
            position: absolute;
            top: 20px;
            right: 20px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 20px;
            padding: 8px 16px;
            color: var(--text-white);
            font-size: 14px;
            cursor: pointer;
            transition: var(--transition);
            backdrop-filter: blur(10px);
            display: flex;
            align-items: center;
            gap: 8px;
            overflow: hidden;
            position: relative;
        }

        .theme-toggle::after {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.6s ease;
        }

        .theme-toggle:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: rgba(255, 255, 255, 0.3);
            transform: translateY(-1px) scale(1.02);
        }

        [data-theme="noir"] .theme-toggle {
            background: rgba(17, 24, 39, 0.7);
            border: 1px solid rgba(250, 204, 21, 0.28);
            color: var(--text-white);
        }

        [data-theme="noir"] .theme-toggle:hover {
            background: rgba(15, 23, 42, 0.82);
            border-color: rgba(250, 204, 21, 0.4);
        }

        [data-theme="aurora"] .theme-toggle {
            background: rgba(127, 90, 240, 0.18);
            border: 1px solid rgba(127, 90, 240, 0.3);
            color: var(--text-white);
        }

        [data-theme="aurora"] .theme-toggle:hover {
            background: rgba(127, 90, 240, 0.25);
            border-color: rgba(34, 211, 238, 0.35);
        }

        .theme-toggle:hover::after {
            left: 100%;
        }

        .theme-toggle.switching {
            animation: themeSwitch 0.8s ease;
        }

        .theme-toggle::before {
            content: '🎨';
            font-size: 16px;
            transition: transform 0.3s ease;
        }

        .theme-toggle:hover::before {
            transform: rotate(180deg);
        }

        @keyframes themeSwitch {
            0% { transform: scale(1) rotate(0deg); }
            25% { transform: scale(1.1) rotate(90deg); }
            50% { transform: scale(1.05) rotate(180deg); }
            75% { transform: scale(1.1) rotate(270deg); }
            100% { transform: scale(1) rotate(360deg); }
        }

        /* 主题切换过渡效果 */
        .theme-transition {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), var(--new-bg) 0%, transparent 70%);
            pointer-events: none;
            z-index: 9999;
            opacity: 0;
            transition: opacity 0.6s ease;
        }

        .theme-transition.active {
            opacity: 1;
        }

        /* 无障碍支持 */
        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        /* 高对比度模式支持 */
        @media (prefers-contrast: high) {
            :root {
                --text-primary: #000000;
                --text-secondary: #333333;
                --border-color: #000000;
                --border-focus: #0000ff;
                --accent-primary: #0000ff;
                --accent-secondary: #000080;
            }
        }

        /* 减少动画模式支持 */
        @media (prefers-reduced-motion: reduce) {
            * {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
            
            .theme-toggle.switching {
                animation: none;
            }
            
            .theme-transition {
                transition: none;
            }
        }

        /* 键盘焦点指示器 */
        .btn:focus-visible,
        .theme-toggle:focus-visible,
        #markdownInput:focus-visible,
        .password-input:focus-visible {
            outline: 3px solid var(--border-focus);
            outline-offset: 2px;
        }

        .quick-action-btn:focus-visible {
            outline: 2px solid var(--accent-primary);
            outline-offset: 1px;
        }

        .header h1 {
            font-size: 2.5em;
            margin-bottom: 10px;
        }

        .header p {
            font-size: 1.1em;
            opacity: 0.9;
            margin-bottom: 15px;
        }

        .author-info {
            font-size: 0.9em;
            opacity: 0.8;
            font-style: italic;
        }

        .author-info .author-name {
            font-weight: bold;
            color: #E8F5E8;
        }

        .main-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            padding: 20px;
            min-height: 500px;
        }

        .input-section, .preview-section {
            display: flex;
            flex-direction: column;
        }

        .section-title {
            font-size: 1.3em;
            color: var(--text-primary);
            margin-bottom: 15px;
            font-weight: 600;
            transition: var(--transition);
        }

        #markdownInput {
            width: 100%;
            height: 400px;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            padding: 15px;
            font-family: 'Courier New', monospace;
            font-size: 14px;
            resize: vertical;
            transition: var(--transition);
            line-height: 1.5;
            background: var(--container-bg);
            color: var(--text-primary);
        }

        #markdownInput:focus {
            outline: none;
            border-color: var(--border-focus);
        }

        #preview {
            border: 2px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            min-height: 400px;
            background: var(--preview-bg);
            overflow-y: auto;
            transition: var(--transition);
            color: var(--text-primary);
            position: relative;
        }

        .preview-block {
            position: relative;
            border-radius: 10px;
            transition: background 0.18s ease, box-shadow 0.18s ease;
        }

        .preview-block:not(.is-selected):hover {
            background: rgba(9, 132, 227, 0.05);
        }

        .preview-block.is-selected {
            background: rgba(9, 132, 227, 0.12);
            box-shadow: inset 0 0 0 2px rgba(9, 132, 227, 0.35);
        }

        .preview-status-stack {
            position: absolute;
            top: 16px;
            right: 16px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            align-items: flex-end;
            pointer-events: none;
            z-index: 5;
        }

        .preview-status-stack > * {
            pointer-events: auto;
        }

        .status-card {
            background: var(--glass-bg);
            border-radius: 12px;
            border: 1px solid var(--glass-border);
            box-shadow: 
                0 12px 32px rgba(0, 0, 0, 0.12),
                0 0 0 1px rgba(255, 255, 255, 0.08);
            backdrop-filter: var(--blur);
            color: var(--text-primary);
            padding: 12px 16px;
            width: min(320px, 100%);
        }

        .controls {
            padding: 30px;
            background: var(--controls-bg);
            border-top: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .controls-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
            max-width: 1200px;
            margin: 0 auto;
            grid-auto-flow: row dense;
        }

        .control-group {
            background: var(--glass-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
            backdrop-filter: var(--blur);
            transition: var(--transition);
        }

        .control-group:hover {
            border-color: var(--border-focus);
            transform: translateY(-1px);
        }

        .control-group-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .control-group-desc {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 16px;
            line-height: 1.4;
        }

        .control-buttons {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .control-buttons .btn {
            margin: 0;
            flex: 1;
            min-width: 90px;
            font-size: 13px;
            padding: 12px 16px;
        }

        @media (max-width: 768px) {
            .controls-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            
            .control-buttons {
                flex-direction: column;
            }
            
            .control-buttons .btn {
                min-width: unset;
            }
        }

        .btn {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: var(--text-white);
            border: none;
            padding: 14px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: 12px;
            cursor: pointer;
            margin: 0 8px;
            transition: var(--transition);
            box-shadow: 
                0 3px 12px var(--shadow-hover),
                inset 0 1px 0 rgba(255, 255, 255, 0.18);
            backdrop-filter: var(--blur);
            border: 1px solid rgba(255, 255, 255, 0.1);
            position: relative;
            overflow: hidden;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s;
        }

        .btn:hover::before {
            left: 100%;
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 
                0 6px 18px var(--shadow-focus),
                inset 0 1px 0 rgba(255, 255, 255, 0.26);
            filter: brightness(1.05) saturate(1.1);
        }

        .btn:active {
            transform: translateY(-1px);
            box-shadow: 0 4px 14px var(--shadow-hover);
        }

        /* AI修复按钮特殊样式 */
        .ai-fix-btn {
            background: linear-gradient(135deg, #ff6b6b, #ff8e53) !important;
            position: relative;
            overflow: hidden;
        }

        .ai-fix-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            transition: left 0.6s;
        }

        .ai-fix-btn:hover::before {
            left: 100%;
        }

        .ai-fix-btn:hover {
            background: linear-gradient(135deg, #ff5252, #ff7043) !important;
            transform: translateY(-2px);
            box-shadow: 
                0 8px 24px rgba(255, 107, 107, 0.4),
                inset 0 1px 0 rgba(255, 255, 255, 0.3);
            filter: brightness(1.1) saturate(1.2);
        }

        .ai-fix-btn:active {
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(255, 107, 107, 0.3);
        }

        /* AI修复功能组样式 */
        .ai-usage-info {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 12px;
            background: rgba(255, 107, 107, 0.1);
            border-radius: 6px;
            border-left: 3px solid #ff6b6b;
        }

        .ai-usage-info span {
            font-weight: 600;
            color: #ff6b6b;
        }

        /* AI配置模态框动画 */
        .ai-config-modal {
            animation: fadeIn 0.3s ease-out;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: scale(0.9);
            }
            to {
                opacity: 1;
                transform: scale(1);
            }
        }

        .example-section {
            margin: 20px 0;
        }

        .example-btn {
            background: #2196F3;
            font-size: 14px;
            padding: 8px 20px;
        }

        .example-btn:hover {
            background: #1976D2;
        }

        /* 平板端优化 */