/* ========== 行书专精页面专属样式 ========== */
/* 版本: 1.0.0 | 栏目: 书法-行书专精 | 作者: 芦笛 */

/* ===== 栏目专属色变量 ===== */
:root {
    --color-xingshu-primary: #6B5B73;
    --color-xingshu-dark: #4A3F50;
    --color-xingshu-light: #9B8BA3;
    --color-xingshu-accent: #C4A77D;
    --color-ink-wash: #2C2C2C;
    --color-paper: #F5F0E8;
    --color-seal-red: #C53D43;
}

/* ===== 页面头部 ===== */
.page-header {
    position: relative;
    min-height: 65vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #4A3F50, #6B5B73, #5B4A63, #3A2F40);
    background-size: 400% 400%;
    animation: gradient-shift 15s ease infinite;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.025'%3E%3Cpath d='M50 50h-5v5h5v-5zm0-40h-5v5h5v-5zM10 50H5v5h5v-5zM10 10H5v5h5v-5z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.page-header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 100px;
    background: var(--color-cream);
    clip-path: ellipse(70% 100% at 50% 100%);
}

.page-header-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
    padding: var(--space-xl) var(--space-md) var(--space-lg);
    max-width: 800px;
}

.page-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    margin-bottom: var(--space-sm);
    letter-spacing: 12px;
    text-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.page-subtitle {
    font-size: 1.05rem;
    opacity: 0.75;
    max-width: 560px;
    margin: 0 auto;
    line-height: 2;
    font-weight: 300;
    letter-spacing: 1px;
}

.page-header-deco {
    position: absolute;
    width: 200px;
    height: 200px;
    border: 1px solid rgba(196, 167, 125, 0.15);
    border-radius: 50%;
    pointer-events: none;
}

.page-header-deco:nth-child(1) {
    top: 10%;
    left: 5%;
    width: 150px;
    height: 150px;
    animation: spin-slow 60s linear infinite;
}

.page-header-deco:nth-child(2) {
    bottom: 15%;
    right: 8%;
    width: 100px;
    height: 100px;
    animation: spin-slow 45s linear infinite reverse;
}

.page-header-deco:nth-child(3) {
    top: 30%;
    right: 15%;
    width: 60px;
    height: 60px;
    border-color: rgba(196, 167, 125, 0.1);
    animation: spin-slow 30s linear infinite;
}

/* ===== 面包屑导航 ===== */
.breadcrumb-wrap {
    background: var(--color-cream);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(30, 30, 36, 0.04);
}

.breadcrumb-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* ===== 行书定义区 ===== */
.definition-section {
    padding: var(--space-2xl) var(--space-md);
    background: var(--color-cream);
}

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

.definition-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

@media (max-width: 968px) {
    .definition-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}

.definition-text h2 {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
    letter-spacing: 3px;
    line-height: 1.4;
}

.definition-text p {
    font-size: 0.95rem;
    color: var(--color-warm-gray);
    line-height: 2;
    margin-bottom: var(--space-md);
    font-weight: 300;
}

.definition-quote {
    border-left: 3px solid var(--color-accent);
    padding-left: var(--space-md);
    margin: var(--space-md) 0;
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--color-primary);
    font-style: italic;
    line-height: 1.8;
}

.definition-quote cite {
    display: block;
    margin-top: var(--space-xs);
    font-size: 0.8rem;
    color: var(--color-warm-gray);
    font-style: normal;
}

.definition-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
    margin: var(--space-md) 0;
}

.definition-feature {
    display: flex;
    align-items: flex-start;
    gap: var(--space-xs);
    font-size: 0.85rem;
    color: var(--color-warm-gray);
    line-height: 1.6;
}

.definition-feature::before {
    content: '◆';
    color: var(--color-seal-red);
    font-size: 0.5rem;
    margin-top: 5px;
    flex-shrink: 0;
}

.definition-visual {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/3;
    background: var(--color-pale);
    box-shadow: var(--shadow-lg);
}

.definition-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.definition-visual:hover img {
    transform: scale(1.03);
}

.definition-visual-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-md);
    background: linear-gradient(transparent, rgba(30,30,36,0.7));
    color: white;
    font-size: 0.85rem;
    text-align: center;
}

/* ===== 历史发展区 ===== */
.history-section {
    padding: var(--space-2xl) var(--space-md);
    background: white;
}

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

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

.history-timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-accent), var(--color-xingshu-light), var(--color-accent));
}

.history-era {
    position: relative;
    margin-bottom: var(--space-xl);
    padding-left: var(--space-lg);
}

.history-era:last-child {
    margin-bottom: 0;
}

.history-era::before {
    content: '';
    position: absolute;
    left: -33px;
    top: 6px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 3px solid white;
    box-shadow: 0 0 0 3px var(--color-accent);
}

.era-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-xs);
    letter-spacing: 2px;
}

.era-period {
    display: inline-block;
    padding: 2px 10px;
    background: rgba(196, 167, 125, 0.1);
    color: var(--color-xingshu-primary);
    font-size: 0.75rem;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
}

.era-desc {
    font-size: 0.9rem;
    color: var(--color-warm-gray);
    line-height: 1.9;
    margin-bottom: var(--space-sm);
    font-weight: 300;
}

.era-masters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.era-master-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    background: rgba(123, 107, 131, 0.06);
    color: var(--color-xingshu-primary);
    font-size: 0.8rem;
    border-radius: var(--radius-full);
    font-weight: 500;
}

/* ===== 技法精讲区 ===== */
.technique-section {
    padding: var(--space-2xl) var(--space-md);
    background: linear-gradient(180deg, var(--color-cream) 0%, white 50%, var(--color-cream) 100%);
}

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

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

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

.technique-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);
}

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

.technique-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.technique-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-xingshu-primary), var(--color-xingshu-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: white;
    flex-shrink: 0;
}

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

.technique-desc {
    font-size: 0.88rem;
    color: var(--color-warm-gray);
    line-height: 1.9;
    margin-bottom: var(--space-sm);
    font-weight: 300;
}

.technique-points {
    list-style: none;
    padding: 0;
}

.technique-points li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: var(--color-warm-gray);
    line-height: 1.7;
}

.technique-points li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 600;
}

/* ===== 笔画演示画布区 ===== */
.stroke-demo-section {
    padding: var(--space-2xl) var(--space-md);
    background: white;
}

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

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

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

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

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

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

.stroke-demo-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
    letter-spacing: 1px;
}

.stroke-canvas {
    width: 100%;
    height: 160px;
    background: #FAF8F5;
    border-radius: var(--radius-md);
    border: 1px solid rgba(30, 30, 36, 0.06);
    margin-bottom: var(--space-sm);
}

.stroke-desc {
    font-size: 0.8rem;
    color: var(--color-warm-gray);
    line-height: 1.6;
    font-weight: 300;
}

/* ===== 经典碑帖区 ===== */
.masterworks-section {
    padding: var(--space-2xl) var(--space-md);
    background: var(--color-cream);
}

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

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

@media (max-width: 968px) {
    .masterworks-grid {
        grid-template-columns: 1fr;
    }
}

.masterwork-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(30, 30, 36, 0.04);
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
}

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

.masterwork-visual {
    position: relative;
    aspect-ratio: 16/9;
    background: var(--color-pale);
    overflow: hidden;
}

.masterwork-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.masterwork-card:hover .masterwork-visual img {
    transform: scale(1.05);
}

.masterwork-rank {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    padding: 4px 12px;
    background: var(--color-seal-red);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    letter-spacing: 1px;
}

.masterwork-content {
    padding: var(--space-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

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

.masterwork-meta {
    font-size: 0.8rem;
    color: var(--color-warm-gray);
    margin-bottom: var(--space-sm);
}

.masterwork-desc {
    font-size: 0.88rem;
    color: var(--color-warm-gray);
    line-height: 1.8;
    margin-bottom: var(--space-sm);
    font-weight: 300;
    flex: 1;
}

.masterwork-features {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: var(--space-sm);
}

.masterwork-tag {
    display: inline-block;
    padding: 2px 10px;
    background: rgba(123, 107, 131, 0.06);
    color: var(--color-xingshu-primary);
    font-size: 0.72rem;
    border-radius: var(--radius-full);
    font-weight: 500;
}

.masterwork-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.85rem;
    color: var(--color-accent);
    font-weight: 500;
    transition: var(--transition-fast);
}

.masterwork-link:hover {
    gap: 8px;
    color: var(--color-xingshu-primary);
}

/* ===== 名家谱系区 ===== */
.masters-section {
    padding: var(--space-2xl) var(--space-md);
    background: white;
}

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

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

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

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

.master-card {
    background: var(--color-cream);
    border-radius: var(--radius-lg);
    padding: var(--space-lg) var(--space-md);
    text-align: center;
    border: 1px solid rgba(30, 30, 36, 0.04);
    transition: var(--transition-normal);
    cursor: pointer;
}

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

.master-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-xingshu-light), var(--color-xingshu-primary));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-sm);
    font-family: var(--font-display);
    font-size: 1.6rem;
    color: white;
    font-weight: 700;
}

.master-name {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 4px;
    letter-spacing: 1px;
}

.master-dynasty {
    font-size: 0.75rem;
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
    font-weight: 500;
}

.master-style {
    font-size: 0.8rem;
    color: var(--color-warm-gray);
    line-height: 1.6;
    font-weight: 300;
}

/* ===== 临习建议区 ===== */
.practice-section {
    padding: var(--space-2xl) var(--space-md);
    background: linear-gradient(180deg, var(--color-cream) 0%, white 50%, var(--color-cream) 100%);
}

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

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

@media (max-width: 968px) {
    .practice-grid {
        grid-template-columns: 1fr;
    }
}

.practice-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;
}

.practice-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-xingshu-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-normal);
}

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

.practice-card:hover::before {
    transform: scaleX(1);
}

.practice-step {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-accent);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

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

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

.practice-list {
    list-style: none;
    padding: 0;
    margin-top: var(--space-sm);
}

.practice-list li {
    position: relative;
    padding-left: 16px;
    margin-bottom: 6px;
    font-size: 0.82rem;
    color: var(--color-warm-gray);
    line-height: 1.6;
}

.practice-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

/* ===== 章法图解画布区 ===== */
.composition-section {
    padding: var(--space-2xl) var(--space-md);
    background: white;
}

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

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

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

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

.composition-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
    letter-spacing: 1px;
    text-align: center;
}

.composition-canvas {
    width: 100%;
    height: 200px;
    background: #FAF8F5;
    border-radius: var(--radius-md);
    border: 1px solid rgba(30, 30, 36, 0.06);
    margin-bottom: var(--space-sm);
}

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

/* ===== 常见问题区 ===== */
.faq-section {
    padding: var(--space-2xl) var(--space-md);
    background: var(--color-cream);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-sm);
    border: 1px solid rgba(30, 30, 36, 0.04);
    overflow: hidden;
    transition: var(--transition-normal);
}

.faq-item:hover {
    box-shadow: var(--shadow-sm);
}

.faq-question {
    padding: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-dark);
    letter-spacing: 1px;
}

.faq-question::after {
    content: '+';
    font-size: 1.4rem;
    color: var(--color-accent);
    transition: var(--transition-fast);
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 var(--space-md) var(--space-md);
}

.faq-answer p {
    font-size: 0.88rem;
    color: var(--color-warm-gray);
    line-height: 1.9;
    font-weight: 300;
}

/* ===== CTA 区 ===== */
.cta-section {
    padding: var(--space-2xl) var(--space-md);
    background: linear-gradient(135deg, var(--color-xingshu-dark), #3A2F40, var(--color-xingshu-primary));
    background-size: 400% 400%;
    animation: gradient-shift 15s ease infinite;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.cta-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    letter-spacing: 3px;
}

.cta-desc {
    font-size: 1rem;
    opacity: 0.7;
    margin-bottom: var(--space-lg);
    font-weight: 300;
    line-height: 1.9;
}

.cta-buttons {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== 响应式补充 ===== */
@media (max-width: 768px) {
    .page-title {
        letter-spacing: 6px;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .cta-buttons .btn {
        width: 100%;
        max-width: 280px;
    }

    .history-timeline {
        padding-left: 30px;
    }

    .history-timeline::before {
        left: 10px;
    }

    .history-era::before {
        left: -28px;
        width: 14px;
        height: 14px;
    }
}

/* ===== 动画关键帧补充 ===== */
@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

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