/* ========== 古琴页面专属样式 ========== */
/* 版本: 1.0.0 | 栏目: 音乐-古琴 | 作者: 芦笛 */

/* ===== 页面头部 ===== */
.guqin-header {
    position: relative;
    min-height: 65vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #3D5A59, #5B7B7A, #4D6564, #2D4544);
    background-size: 400% 400%;
    animation: gradient-shift 15s ease infinite;
    overflow: hidden;
}

.guqin-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;
}

.guqin-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%);
}

/* ===== 古琴概览区 ===== */
.guqin-overview .overview-text h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

/* ===== 历史沿革区 ===== */
.history-section {
    padding: var(--space-2xl) var(--space-md);
    background: linear-gradient(180deg, var(--color-cream) 0%, white 30%, white 70%, var(--color-cream) 100%);
}

.history-container {
    max-width: 1000px;
    margin: 0 auto;
}

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

.history-timeline::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-accent), var(--color-music-light), var(--color-accent));
}

.history-item {
    position: relative;
    margin-bottom: var(--space-xl);
    padding-left: var(--space-lg);
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.history-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.history-item::before {
    content: '';
    position: absolute;
    left: -33px;
    top: 4px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 3px solid white;
    box-shadow: 0 0 0 2px var(--color-accent);
    z-index: 1;
}

.history-period {
    display: inline-block;
    padding: 4px 16px;
    background: var(--color-music-primary);
    color: white;
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
    letter-spacing: 2px;
}

.history-content h4 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--color-dark);
    margin-bottom: var(--space-xs);
    letter-spacing: 1px;
}

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

@media (max-width: 768px) {
    .history-timeline {
        padding-left: 20px;
    }
    .history-item::before {
        left: -28px;
        width: 12px;
        height: 12px;
    }
    .history-timeline::before {
        left: 10px;
    }
}

/* ===== 构造区 ===== */
.structure-section {
    padding: var(--space-2xl) var(--space-md);
    background: white;
}

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

.structure-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: start;
    margin-top: var(--space-lg);
}

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

.structure-visual {
    position: sticky;
    top: 100px;
    background: linear-gradient(135deg, #E8F0EF, #D5E0DF);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.structure-visual canvas {
    width: 100%;
    max-width: 500px;
    height: auto;
}

.structure-caption {
    margin-top: var(--space-sm);
    font-size: 0.8rem;
    color: var(--color-warm-gray);
    text-align: center;
}

.structure-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.structure-group {
    padding: var(--space-md);
    background: var(--color-cream);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-music-primary);
    transition: var(--transition-fast);
}

.structure-group:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.structure-group h4 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    color: var(--color-dark);
    margin-bottom: var(--space-xs);
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 1px;
}

.structure-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-music-primary);
    display: inline-block;
}

.structure-group p {
    font-size: 0.85rem;
    color: var(--color-warm-gray);
    line-height: 1.9;
    font-weight: 300;
}

@media (max-width: 968px) {
    .structure-visual {
        position: relative;
        top: 0;
    }
}

/* ===== 音位区 ===== */
.fretboard-section {
    padding: var(--space-2xl) var(--space-md);
    background: var(--color-cream);
}

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

.fretboard-wrap {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    box-shadow: var(--shadow-md);
    margin-top: var(--space-lg);
    overflow-x: auto;
}

.fretboard-wrap canvas {
    width: 100%;
    max-width: 900px;
    height: auto;
    display: block;
    margin: 0 auto;
}

.fretboard-legend {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-top: var(--space-md);
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    color: var(--color-warm-gray);
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

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

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

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

.info-card h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--color-music-primary);
    margin-bottom: var(--space-xs);
    letter-spacing: 1px;
}

.info-card p {
    font-size: 0.82rem;
    color: var(--color-warm-gray);
    line-height: 1.8;
    font-weight: 300;
}

/* ===== 减字谱区 ===== */
.notation-section {
    padding: var(--space-2xl) var(--space-md);
    background: white;
}

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

.notation-intro {
    max-width: 800px;
    margin: 0 auto var(--space-xl);
    text-align: center;
}

.notation-intro p {
    font-size: 0.9rem;
    color: var(--color-warm-gray);
    line-height: 2;
    font-weight: 300;
    margin-bottom: var(--space-sm);
}

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

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

.notation-panel.wide {
    grid-column: 1 / -1;
}

.notation-panel h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
    text-align: center;
    letter-spacing: 2px;
}

.notation-panel canvas {
    width: 100%;
    max-width: 400px;
    height: auto;
    display: block;
    margin: 0 auto var(--space-sm);
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.notation-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.notation-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    background: white;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
}

.notation-symbol {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-music-primary);
    color: white;
    border-radius: var(--radius-sm);
    font-family: var(--font-display);
    font-size: 0.9rem;
    flex-shrink: 0;
}

.notation-name {
    color: var(--color-warm-gray);
    font-weight: 300;
}

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

.jianzi-ex {
    text-align: center;
    padding: var(--space-md);
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

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

.jianzi-char {
    font-family: var(--font-display);
    color: var(--color-music-primary);
    margin-bottom: var(--space-xs);
    line-height: 1;
}

.jianzi-desc strong {
    font-size: 0.9rem;
    color: var(--color-dark);
    display: block;
    margin-bottom: 4px;
}

.jianzi-desc p {
    font-size: 0.75rem;
    color: var(--color-warm-gray);
    font-weight: 300;
}

@media (max-width: 768px) {
    .notation-grid {
        grid-template-columns: 1fr;
    }
    .notation-panel.wide {
        grid-column: 1;
    }
    .jianzi-examples {
        grid-template-columns: repeat(2, 1fr);
    }
    .notation-list {
        grid-template-columns: 1fr;
    }
}

/* ===== 指法区 ===== */
.finger-section {
    padding: var(--space-2xl) var(--space-md);
    background: linear-gradient(180deg, var(--color-cream) 0%, white 50%, var(--color-cream) 100%);
}

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

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

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

.finger-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;
}

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

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

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

.finger-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-music-light), var(--color-music-primary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
    font-family: var(--font-display);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.finger-card h4 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    color: var(--color-dark);
    margin-bottom: var(--space-xs);
    letter-spacing: 1px;
}

.finger-card p {
    font-size: 0.85rem;
    color: var(--color-warm-gray);
    line-height: 1.9;
    font-weight: 300;
    margin-bottom: var(--space-sm);
}

.finger-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.finger-tags span {
    padding: 3px 10px;
    background: rgba(91, 123, 122, 0.08);
    color: var(--color-music-primary);
    font-size: 0.75rem;
    border-radius: var(--radius-full);
    font-weight: 500;
}

/* ===== 曲目区 ===== */
.repertoire-section {
    padding: var(--space-2xl) var(--space-md);
    background: white;
}

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

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

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

.repertoire-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);
    position: relative;
    overflow: hidden;
}

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

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

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

.repertoire-meta {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-xs);
    flex-wrap: wrap;
}

.repertoire-era {
    padding: 2px 10px;
    background: var(--color-music-primary);
    color: white;
    font-size: 0.7rem;
    border-radius: var(--radius-full);
    font-weight: 500;
}

.repertoire-difficulty {
    padding: 2px 10px;
    background: rgba(196, 167, 125, 0.15);
    color: var(--color-accent);
    font-size: 0.7rem;
    border-radius: var(--radius-full);
    font-weight: 500;
}

.repertoire-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--color-dark);
    margin-bottom: var(--space-xs);
    letter-spacing: 2px;
}

.repertoire-desc {
    font-size: 0.85rem;
    color: var(--color-warm-gray);
    line-height: 1.9;
    font-weight: 300;
    margin-bottom: var(--space-sm);
}

.repertoire-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.repertoire-tags span {
    padding: 3px 10px;
    background: rgba(91, 123, 122, 0.08);
    color: var(--color-music-primary);
    font-size: 0.75rem;
    border-radius: var(--radius-full);
    font-weight: 500;
}

/* ===== 美学区 ===== */
.aesthetics-section {
    padding: var(--space-2xl) var(--space-md);
    background: linear-gradient(180deg, var(--color-cream) 0%, white 50%, var(--color-cream) 100%);
}

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

.aesthetics-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
    margin-top: var(--space-lg);
    margin-bottom: var(--space-xl);
}

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

.aesthetics-text h3 {
    font-family: var(--font-display);
    font-size: clamp(1.3rem, 2.5vw, 1.6rem);
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
    letter-spacing: 2px;
}

.aesthetics-text p {
    font-size: 0.9rem;
    color: var(--color-warm-gray);
    line-height: 2;
    font-weight: 300;
    margin-bottom: var(--space-sm);
}

.aesthetics-quotes {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.aesthetics-quotes blockquote {
    border-left: 3px solid var(--color-accent);
    padding-left: var(--space-md);
    font-family: var(--font-display);
    font-size: 0.95rem;
    color: var(--color-primary);
    font-style: italic;
    line-height: 1.8;
}

.aesthetics-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.aesthetics-visual canvas {
    width: 100%;
    max-width: 500px;
    height: auto;
}

.aesthetics-caption {
    margin-top: var(--space-sm);
    font-size: 0.8rem;
    color: var(--color-warm-gray);
    text-align: center;
}

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

@media (max-width: 768px) {
    .aesthetics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.aesthetics-card {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--space-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(30, 30, 36, 0.04);
    transition: var(--transition-fast);
}

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

.aesthetics-card h5 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--color-music-primary);
    margin-bottom: var(--space-xs);
    letter-spacing: 2px;
}

.aesthetics-card p {
    font-size: 0.8rem;
    color: var(--color-warm-gray);
    line-height: 1.7;
    font-weight: 300;
}

/* ===== 学习路径区 ===== */
.learning-section {
    padding: var(--space-2xl) var(--space-md);
    background: white;
}

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

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

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

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

.learning-step {
    text-align: center;
    flex: 1;
    position: relative;
    z-index: 1;
    max-width: 220px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.learning-step.visible {
    opacity: 1;
    transform: translateY(0);
}

.learning-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);
}

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

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

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

.learning-duration {
    display: inline-block;
    margin-top: var(--space-xs);
    padding: 2px 10px;
    background: rgba(91, 123, 122, 0.08);
    color: var(--color-music-primary);
    font-size: 0.75rem;
    border-radius: var(--radius-full);
}

/* ===== 琴家流派区 ===== */
.masters-section {
    padding: var(--space-2xl) var(--space-md);
    background: var(--color-cream);
}

.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;
    }
}

.masters-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;
}

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

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

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

.masters-card h4 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    color: var(--color-dark);
    margin-bottom: 4px;
    letter-spacing: 2px;
}

.masters-origin {
    font-size: 0.75rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: var(--space-xs);
    letter-spacing: 1px;
}

.masters-card p {
    font-size: 0.82rem;
    color: var(--color-warm-gray);
    line-height: 1.8;
    font-weight: 300;
}

/* ===== CTA区 ===== */
.guqin-cta {
    padding: var(--space-2xl) var(--space-md);
    background: linear-gradient(135deg, var(--color-music-dark), #2D4544, var(--color-music-primary));
    background-size: 400% 400%;
    animation: gradient-shift 15s ease infinite;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.guqin-cta::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");
}

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