/* ========== 隶书专精页面专属样式 ========== */

        /* ===== 页面头部 - 隶书专属渐变 ===== */
        .page-header-lishu {
            background: linear-gradient(135deg, #4A3F50, #5B4A3A, #6B5B4A, #3A2F28);
            background-size: 400% 400%;
            animation: gradient-shift 15s ease infinite;
        }

        .page-header-lishu::after {
            background: var(--color-cream);
            clip-path: ellipse(70% 100% at 50% 100%);
        }

        /* ===== 内容区块通用 ===== */
        .content-section {
            padding: var(--space-2xl) var(--space-md);
        }

        .content-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        /* ===== 演变时间轴 ===== */
        .timeline-section {
            background: var(--color-cream);
        }

        .timeline-wrap {
            position: relative;
            padding-left: 40px;
            margin-top: var(--space-lg);
        }

        .timeline-wrap::before {
            content: '';
            position: absolute;
            left: 12px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, var(--color-accent), var(--color-calligraphy-light), var(--color-accent));
        }

        .timeline-item {
            position: relative;
            padding-bottom: var(--space-lg);
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-dot {
            position: absolute;
            left: -34px;
            top: 4px;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: white;
            border: 3px solid var(--color-accent);
            box-shadow: 0 0 0 4px rgba(196, 167, 125, 0.15);
            z-index: 1;
        }

        .timeline-item.active .timeline-dot {
            background: var(--color-accent);
            box-shadow: 0 0 0 6px rgba(196, 167, 125, 0.25);
        }

        .timeline-period {
            font-family: var(--font-display);
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 4px;
            letter-spacing: 2px;
        }

        .timeline-era {
            display: inline-block;
            padding: 2px 10px;
            background: rgba(123, 107, 131, 0.08);
            color: var(--color-calligraphy-primary);
            font-size: 0.75rem;
            border-radius: var(--radius-full);
            margin-bottom: var(--space-xs);
            font-weight: 500;
        }

        .timeline-desc {
            font-size: 0.92rem;
            color: var(--color-warm-gray);
            line-height: 1.9;
            font-weight: 300;
        }

        .timeline-desc strong {
            color: var(--color-dark);
            font-weight: 500;
        }

        /* ===== 笔画演示区 - Canvas绘制 ===== */
        .strokes-section {
            background: white;
        }

        .strokes-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-md);
            margin-top: var(--space-lg);
        }

        @media (max-width: 968px) {
            .strokes-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .strokes-grid {
                grid-template-columns: 1fr;
            }
        }

        .stroke-card {
            background: var(--color-cream);
            border-radius: var(--radius-lg);
            padding: var(--space-lg);
            border: 1px solid rgba(30, 30, 36, 0.04);
            transition: var(--transition-normal);
        }

        .stroke-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--color-accent);
        }

        .stroke-canvas-wrap {
            background: white;
            border-radius: var(--radius-md);
            padding: var(--space-sm);
            margin-bottom: var(--space-sm);
            border: 1px solid rgba(30, 30, 36, 0.06);
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 120px;
        }

        .stroke-canvas-wrap canvas {
            max-width: 100%;
            height: auto;
        }

        .stroke-name {
            font-family: var(--font-display);
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 4px;
            letter-spacing: 2px;
        }

        .stroke-name-en {
            font-size: 0.7rem;
            color: var(--color-warm-gray);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: var(--space-xs);
        }

        .stroke-desc {
            font-size: 0.85rem;
            color: var(--color-warm-gray);
            line-height: 1.8;
            font-weight: 300;
        }

        .stroke-tip {
            display: flex;
            align-items: flex-start;
            gap: 6px;
            margin-top: var(--space-xs);
            padding: 8px 12px;
            background: rgba(196, 167, 125, 0.08);
            border-radius: var(--radius-sm);
            font-size: 0.8rem;
            color: var(--color-calligraphy-primary);
            line-height: 1.6;
        }

        .stroke-tip::before {
            content: '💡';
            flex-shrink: 0;
        }

        /* ===== 结构规律区 ===== */
        .structure-section {
            background: linear-gradient(180deg, var(--color-cream) 0%, white 50%, var(--color-cream) 100%);
        }

        .rules-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--space-md);
            margin-top: var(--space-lg);
        }

        @media (max-width: 768px) {
            .rules-grid {
                grid-template-columns: 1fr;
            }
        }

        .rule-card {
            background: white;
            border-radius: var(--radius-lg);
            padding: var(--space-lg);
            border: 1px solid rgba(30, 30, 36, 0.04);
            transition: var(--transition-normal);
            position: relative;
            overflow: hidden;
        }

        .rule-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg, var(--color-accent), var(--color-calligraphy-light));
            transform: scaleY(0);
            transform-origin: top;
            transition: var(--transition-normal);
        }

        .rule-card:hover::before {
            transform: scaleY(1);
        }

        .rule-card:hover {
            box-shadow: var(--shadow-md);
        }

        .rule-number {
            font-family: var(--font-display);
            font-size: 2.5rem;
            font-weight: 900;
            color: rgba(196, 167, 125, 0.2);
            line-height: 1;
            margin-bottom: var(--space-xs);
        }

        .rule-title {
            font-family: var(--font-display);
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: var(--space-xs);
            letter-spacing: 2px;
        }

        .rule-desc {
            font-size: 0.9rem;
            color: var(--color-warm-gray);
            line-height: 1.9;
            font-weight: 300;
        }

        .rule-example {
            margin-top: var(--space-sm);
            padding: var(--space-sm);
            background: var(--color-cream);
            border-radius: var(--radius-sm);
            font-family: var(--font-display);
            font-size: 1.8rem;
            text-align: center;
            color: var(--color-primary);
            letter-spacing: 8px;
            line-height: 1.4;
        }

        /* ===== 碑帖展示区 ===== */
        .steles-section {
            background: white;
        }

        .steles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-md);
            margin-top: var(--space-lg);
        }

        @media (max-width: 1024px) {
            .steles-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .steles-grid {
                grid-template-columns: 1fr;
            }
        }

        .stele-card {
            background: var(--color-cream);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(30, 30, 36, 0.04);
            transition: var(--transition-normal);
            cursor: pointer;
        }

        .stele-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .stele-header {
            padding: var(--space-md) var(--space-lg);
            background: linear-gradient(135deg, var(--color-calligraphy-primary), var(--color-calligraphy-dark));
            color: white;
            position: relative;
            overflow: hidden;
        }

        .stele-header::after {
            content: '';
            position: absolute;
            right: -20px;
            top: -20px;
            width: 80px;
            height: 80px;
            border: 2px solid rgba(255,255,255,0.1);
            border-radius: 50%;
        }

        .stele-name {
            font-family: var(--font-display);
            font-size: 1.3rem;
            font-weight: 700;
            letter-spacing: 3px;
            margin-bottom: 4px;
        }

        .stele-meta {
            font-size: 0.8rem;
            opacity: 0.75;
            font-weight: 300;
        }

        .stele-body {
            padding: var(--space-md) var(--space-lg);
        }

        .stele-style-tag {
            display: inline-block;
            padding: 3px 12px;
            background: rgba(123, 107, 131, 0.1);
            color: var(--color-calligraphy-primary);
            font-size: 0.75rem;
            border-radius: var(--radius-full);
            margin-bottom: var(--space-sm);
            font-weight: 500;
        }

        .stele-desc {
            font-size: 0.88rem;
            color: var(--color-warm-gray);
            line-height: 1.8;
            font-weight: 300;
            margin-bottom: var(--space-sm);
        }

        .stele-features {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .stele-feature {
            padding: 3px 10px;
            background: white;
            border: 1px solid rgba(30, 30, 36, 0.06);
            border-radius: var(--radius-full);
            font-size: 0.75rem;
            color: var(--color-warm-gray);
        }

        .stele-difficulty {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-top: var(--space-sm);
            padding-top: var(--space-sm);
            border-top: 1px solid rgba(30, 30, 36, 0.04);
        }

        .difficulty-label {
            font-size: 0.8rem;
            color: var(--color-warm-gray);
        }

        .difficulty-stars {
            display: flex;
            gap: 2px;
        }

        .difficulty-star {
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: rgba(30, 30, 36, 0.1);
        }

        .difficulty-star.filled {
            background: var(--color-accent);
        }

        /* ===== 临摹方法区 ===== */
        .practice-section {
            background: var(--color-cream);
        }

        .practice-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--space-md);
            margin-top: var(--space-lg);
        }

        @media (max-width: 1024px) {
            .practice-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .practice-grid {
                grid-template-columns: 1fr;
            }
        }

        .practice-card {
            background: white;
            border-radius: var(--radius-lg);
            padding: var(--space-lg);
            text-align: center;
            border: 1px solid rgba(30, 30, 36, 0.04);
            transition: var(--transition-normal);
            position: relative;
        }

        .practice-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .practice-step {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-accent), #b89a6a);
            color: white;
            font-family: var(--font-display);
            font-size: 1.2rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--space-sm);
            box-shadow: 0 4px 12px rgba(196, 167, 125, 0.3);
        }

        .practice-name {
            font-family: var(--font-display);
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--color-dark);
            margin-bottom: 6px;
            letter-spacing: 1px;
        }

        .practice-desc {
            font-size: 0.85rem;
            color: var(--color-warm-gray);
            line-height: 1.8;
            font-weight: 300;
        }

        /* ===== 对比分析区 ===== */
        .compare-section {
            background: white;
        }

        .compare-table-wrap {
            margin-top: var(--space-lg);
            overflow-x: auto;
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
        }

        .compare-table th {
            background: linear-gradient(135deg, var(--color-calligraphy-primary), var(--color-calligraphy-dark));
            color: white;
            padding: 14px 16px;
            text-align: left;
            font-weight: 600;
            letter-spacing: 1px;
            font-family: var(--font-display);
        }

        .compare-table th:first-child {
            border-radius: var(--radius-md) 0 0 0;
        }

        .compare-table th:last-child {
            border-radius: 0 var(--radius-md) 0 0;
        }

        .compare-table td {
            padding: 14px 16px;
            border-bottom: 1px solid rgba(30, 30, 36, 0.04);
            color: var(--color-warm-gray);
            line-height: 1.7;
            font-weight: 300;
        }

        .compare-table tr:nth-child(even) {
            background: rgba(250, 248, 245, 0.5);
        }

        .compare-table tr:hover {
            background: rgba(196, 167, 125, 0.05);
        }

        .compare-table td:first-child {
            font-weight: 600;
            color: var(--color-dark);
            font-family: var(--font-display);
        }

        /* ===== 工具推荐区 ===== */
        .tools-section-lishu {
            background: linear-gradient(180deg, var(--color-cream) 0%, white 50%, var(--color-cream) 100%);
        }

        /* ===== 进阶路径区 ===== */
        .pathway-section-lishu {
            background: white;
        }

        .pathway-timeline-lishu {
            display: flex;
            justify-content: space-between;
            margin-top: var(--space-xl);
            position: relative;
        }

        .pathway-timeline-lishu::before {
            content: '';
            position: absolute;
            top: 28px;
            left: 5%;
            right: 5%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--color-accent), var(--color-calligraphy-light), var(--color-accent), transparent);
        }

        @media (max-width: 768px) {
            .pathway-timeline-lishu {
                flex-direction: column;
                gap: var(--space-xl);
            }
            .pathway-timeline-lishu::before {
                display: none;
            }
        }

        /* ===== 引用区块 ===== */
        .quote-block {
            background: linear-gradient(135deg, rgba(123, 107, 131, 0.06), rgba(196, 167, 125, 0.06));
            border-left: 4px solid var(--color-accent);
            padding: var(--space-md) var(--space-lg);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: var(--space-md) 0;
        }

        .quote-block p {
            font-family: var(--font-display);
            font-size: 1.1rem;
            color: var(--color-primary);
            font-style: italic;
            line-height: 1.9;
            margin-bottom: var(--space-xs);
        }

        .quote-block cite {
            font-size: 0.8rem;
            color: var(--color-warm-gray);
            font-style: normal;
        }

        /* ===== 信息提示框 ===== */
        .info-box {
            background: rgba(91, 123, 122, 0.06);
            border: 1px solid rgba(91, 123, 122, 0.15);
            border-radius: var(--radius-md);
            padding: var(--space-md);
            margin: var(--space-md) 0;
            display: flex;
            gap: var(--space-sm);
            align-items: flex-start;
        }

        .info-box-icon {
            font-size: 1.4rem;
            flex-shrink: 0;
        }

        .info-box-content {
            flex: 1;
        }

        .info-box-title {
            font-weight: 600;
            color: var(--color-dark);
            margin-bottom: 4px;
            font-size: 0.95rem;
        }

        .info-box-text {
            font-size: 0.88rem;
            color: var(--color-warm-gray);
            line-height: 1.8;
            font-weight: 300;
        }

        /* ===== 返回顶部按钮样式补充 ===== */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-primary);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition-fast);
            box-shadow: var(--shadow-md);
            z-index: 999;
        }

        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }

        .back-to-top:hover {
            background: var(--color-accent);
            transform: translateY(-3px);
        }

        /* ===== 响应式补充 ===== */
        @media (max-width: 768px) {
            .timeline-wrap {
                padding-left: 30px;
            }
            .timeline-dot {
                left: -26px;
                width: 16px;
                height: 16px;
            }
        }