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

/* ===== 页面头部 - 草书专属渐变 ===== */
.caoshu-page-header {
    position: relative;
    min-height: 65vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #3A2F40, #5B4A63, #4A3F50, #2C2C2C);
    background-size: 400% 400%;
    animation: gradient-shift 15s ease infinite;
    overflow: hidden;
}

.caoshu-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='0.02'%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;
}

.caoshu-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%);
}

.caoshu-page-header .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;
}

.caoshu-page-header .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);
}

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

/* ===== 草书概述区 ===== */
.caoshu-intro-section {
    padding: var(--space-2xl) var(--space-md);
    background: var(--color-cream);
}

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

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

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

.caoshu-intro-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;
}

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

.caoshu-timeline {
    margin: var(--space-md) 0;
    padding-left: var(--space-md);
    border-left: 2px solid var(--color-accent);
}

.caoshu-timeline-item {
    position: relative;
    padding: var(--space-sm) 0 var(--space-sm) var(--space-md);
    font-size: 0.9rem;
    color: var(--color-warm-gray);
    line-height: 1.8;
}

.caoshu-timeline-item::before {
    content: '';
    position: absolute;
    left: calc(-1 * var(--space-md) - 5px);
    top: 20px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 2px solid var(--color-cream);
}

.caoshu-timeline-item strong { color: var(--color-dark); font-weight: 600; }

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

.caoshu-intro-visual canvas { width: 100%; height: 100%; display: block; }

.caoshu-intro-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;
}

/* ===== 三体分类区 ===== */
.three-styles-section {
    padding: var(--space-2xl) var(--space-md);
    background: white;
}

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

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

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

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

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

.style-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

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

.style-icon {
    width: 56px; height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 900;
    color: white;
    flex-shrink: 0;
}

.style-icon.zhangcao { background: linear-gradient(135deg, #7B6B83, #5B4A63); }
.style-icon.jincao { background: linear-gradient(135deg, #6B8B8A, #4D6564); }
.style-icon.kuangcao { background: linear-gradient(135deg, #9B7F6E, #7B5548); }

.style-name {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-dark);
    letter-spacing: 2px;
}

.style-name-en {
    font-size: 0.7rem;
    color: var(--color-warm-gray);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-top: 2px;
}

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

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

.style-tag {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(123, 107, 131, 0.08);
    color: var(--color-calligraphy-primary);
    font-size: 0.75rem;
    border-radius: var(--radius-full);
    font-weight: 500;
}

.style-master {
    font-size: 0.82rem;
    color: var(--color-warm-gray);
    padding-top: var(--space-sm);
    border-top: 1px solid rgba(30,30,36,0.06);
}

.style-master strong { color: var(--color-dark); }

/* ===== 技法精要区 ===== */
.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: 968px) { .technique-grid { grid-template-columns: 1fr; } }

.technique-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(30, 30, 36, 0.04);
    transition: var(--transition-normal);
}

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

.technique-card h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
    letter-spacing: 2px;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.technique-card h3 .tech-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px; height: 32px;
    background: var(--color-accent);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 700;
    flex-shrink: 0;
}

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

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

.technique-card ul li {
    font-size: 0.85rem;
    color: var(--color-warm-gray);
    line-height: 1.8;
    padding: 4px 0;
    padding-left: 20px;
    position: relative;
}

.technique-card ul li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

.technique-canvas-wrap {
    margin-top: var(--space-sm);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--color-pale);
    border: 1px solid rgba(30,30,36,0.06);
}

.technique-canvas-wrap canvas { display: block; width: 100%; height: auto; }

/* ===== 草法规范区 ===== */
.caofa-section {
    padding: var(--space-2xl) var(--space-md);
    background: white;
}

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

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

@media (max-width: 1024px) { .caofa-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .caofa-grid { grid-template-columns: 1fr; } }

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

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

.caofa-card h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: var(--space-xs);
    letter-spacing: 1px;
}

.caofa-card p {
    font-size: 0.82rem;
    color: var(--color-warm-gray);
    line-height: 1.7;
    font-weight: 300;
    margin-bottom: var(--space-sm);
}

.caofa-canvas {
    width: 100%;
    height: 120px;
    background: white;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(30,30,36,0.06);
    margin-top: var(--space-xs);
}

/* ===== 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;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 1px solid rgba(30, 30, 36, 0.04);
}

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

.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);
    filter: grayscale(10%);
}

.masterwork-card:hover .masterwork-visual img {
    transform: scale(1.04);
    filter: grayscale(0%);
}

.masterwork-rank {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 12px;
    background: rgba(30, 30, 36, 0.75);
    backdrop-filter: blur(8px);
    color: white;
    font-size: 0.75rem;
    border-radius: var(--radius-full);
    font-weight: 500;
    letter-spacing: 1px;
}

.masterwork-content { padding: var(--space-md); }

.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;
    font-weight: 300;
}

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

.masterwork-tag {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(123, 107, 131, 0.08);
    color: var(--color-calligraphy-primary);
    font-size: 0.75rem;
    border-radius: var(--radius-full);
    font-weight: 500;
}

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

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

/* ===== 学习路径区 ===== */
.study-path-section {
    padding: var(--space-2xl) var(--space-md);
    background: linear-gradient(180deg, white 0%, var(--color-cream) 50%, white 100%);
}

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

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

.study-path-timeline::before {
    content: '';
    position: absolute;
    top: 28px;
    left: 8%; right: 8%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), var(--color-calligraphy-light), var(--color-accent), transparent);
}

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

.study-step {
    text-align: center;
    flex: 1;
    position: relative;
    z-index: 1;
    max-width: 220px;
}

.study-step .step-badge {
    width: 56px; height: 56px;
    border-radius: var(--radius-full);
    background: white;
    border: 2px solid var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-sm);
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-accent);
    box-shadow: 0 4px 12px rgba(196, 167, 125, 0.2);
    transition: var(--transition-fast);
}

.study-step:hover .step-badge {
    background: var(--color-accent);
    color: white;
    transform: scale(1.1);
}

.study-step h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 6px;
    letter-spacing: 1px;
}

.study-step p {
    font-size: 0.82rem;
    color: var(--color-warm-gray);
    font-weight: 300;
    line-height: 1.7;
}

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

/* ===== 临摹指南区 ===== */
.copy-guide-section {
    padding: var(--space-2xl) var(--space-md);
    background: white;
}

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

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

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

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

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

.copy-guide-card h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
    letter-spacing: 2px;
}

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

.copy-guide-card ul { list-style: none; padding: 0; }

.copy-guide-card ul li {
    font-size: 0.82rem;
    color: var(--color-warm-gray);
    line-height: 1.8;
    padding: 3px 0;
    padding-left: 18px;
    position: relative;
}

.copy-guide-card ul li::before {
    content: '◆';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-size: 0.5rem;
    top: 6px;
}

/* ===== 名家名言区 ===== */
.quotes-section {
    padding: var(--space-2xl) var(--space-md);
    background: linear-gradient(135deg, var(--color-calligraphy-dark), #3A2F40, var(--color-calligraphy-primary));
    background-size: 400% 400%;
    animation: gradient-shift 15s ease infinite;
    position: relative;
    overflow: hidden;
}

.quotes-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");
}

.quotes-container { max-width: 1000px; margin: 0 auto; position: relative; z-index: 1; }

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

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

.quote-card {
    background: rgba(255,255,255,0.06);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border: 1px solid rgba(255,255,255,0.08);
}

.quote-card blockquote {
    font-family: var(--font-display);
    font-size: 1.05rem;
    color: rgba(255,255,255,0.9);
    line-height: 1.9;
    font-style: italic;
    margin-bottom: var(--space-sm);
}

.quote-card cite {
    font-size: 0.85rem;
    color: var(--color-accent);
    font-style: normal;
    opacity: 0.8;
}

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

.caoshu-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");
}

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

.caoshu-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;
}

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

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

/* 返回顶部 */
.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;
    border: none;
}

.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--color-accent); transform: translateY(-2px); }

/* 响应式补充 */
@media (max-width: 768px) {
    .caoshu-page-header .page-title { letter-spacing: 6px; }
    .caoshu-cta-buttons { flex-direction: column; align-items: center; }
    .caoshu-cta-buttons .btn { width: 100%; max-width: 280px; }
}