.knowledge-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.page-title {
    text-align: center;
    color: #333;
    margin-bottom: 40px;
    font-size: 2.5em;
}

.content-nav {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 50px;
}

.nav-card {
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    text-align: center;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.nav-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.nav-card i {
    font-size: 2em;
    color: #8B4513;
    margin-bottom: 10px;
}

.nav-card h3 {
    color: #333;
    margin: 10px 0;
}

.nav-card p {
    color: #666;
    font-size: 0.9em;
    margin: 0;
}

.knowledge-section {
    margin-bottom: 40px;
    padding: 20px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}

.knowledge-section h2 {
    color: #8B4513;
    margin-bottom: 30px;
    padding-bottom: 10px;
    border-bottom: 2px solid #8B4513;
}

.craft-table table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.craft-table th,
.craft-table td {
    padding: 12px;
    border: 1px solid #ddd;
    text-align: left;
}

.craft-table th {
    background: #f5f5f5;
}

/* 历史部分样式 */
.history-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.history-card {
    background: #f9f9f9;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.history-card h4 {
    color: #8B4513;
    margin-bottom: 15px;
}

.history-card ul {
    list-style-type: none;
    padding-left: 0;
}

.history-card li {
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}

.history-card li:before {
    content: "•";
    color: #8B4513;
    position: absolute;
    left: 0;
}

/* 时间线样式 */
.timeline {
    position: relative;
    margin: 40px 0;
    padding-left: 50px;
}

.timeline:before {
    content: "";
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #8B4513;
}

.timeline-item {
    position: relative;
    margin-bottom: 30px;
}

.time-point {
    position: absolute;
    left: -50px;
    background: #8B4513;
    color: white;
    padding: 5px 10px;
    border-radius: 4px;
    font-weight: bold;
}

.time-content {
    background: #fff;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.time-content p {
    margin: 5px 0;
}

.time-content .note {
    color: #666;
    font-size: 0.9em;
    font-style: italic;
}

/* 工艺部分样式优化 */
.craft-table {
    overflow-x: auto;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin: 20px 0;
}

.craft-table table {
    width: 100%;
    border-collapse: collapse;
}

.craft-table th {
    background: #8B4513;
    color: white;
    padding: 15px;
    text-align: left;
}

.craft-table td {
    padding: 15px;
    border-bottom: 1px solid #eee;
}

.craft-table tr:hover {
    background: #f9f9f9;
}

/* 响应式设计优化 */
@media (max-width: 768px) {
    .content-nav {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .page-title {
        font-size: 2em;
    }
    
    .timeline {
        padding-left: 30px;
    }
    
    .timeline:before {
        left: 10px;
    }
    
    .time-point {
        left: -30px;
        font-size: 0.9em;
    }
}

@media (max-width: 480px) {
    .content-nav {
        grid-template-columns: 1fr;
    }
}

/* 茶具系统样式 */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin: 30px 0;
}

.tool-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.tool-card:hover {
    transform: translateY(-5px);
}

.tool-image {
    height: 200px;
    overflow: hidden;
}

.tool-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.tool-info {
    padding: 20px;
}

.tool-info h4 {
    color: #8B4513;
    margin-bottom: 15px;
}

.tool-info ul {
    list-style: none;
    padding: 0;
}

.tool-info li {
    margin-bottom: 8px;
}

.tools-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.tool-item {
    background: #f9f9f9;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

/* 冲泡程式样式 */
.step-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.step-card {
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    position: relative;
}

.step-number {
    position: absolute;
    top: -15px;
    left: -15px;
    width: 30px;
    height: 30px;
    background: #8B4513;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.step-card h4 {
    color: #8B4513;
    margin: 10px 0;
}

.tips-table {
    margin: 30px 0;
    overflow-x: auto;
}

.tips-table table {
    width: 100%;
    border-collapse: collapse;
}

.tips-table th {
    background: #8B4513;
    color: white;
    padding: 15px;
    text-align: left;
}

.tips-table td {
    padding: 15px;
    border-bottom: 1px solid #eee;
}

/* 响应式优化 */
@media (max-width: 768px) {
    .tool-image {
        height: 150px;
    }
    
    .step-number {
        width: 25px;
        height: 25px;
        font-size: 0.9em;
    }
}

/* 文化内涵样式 */
.spirit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.spirit-card {
    background: #fff;
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.spirit-card:hover {
    transform: translateY(-5px);
}

.spirit-card i {
    font-size: 2.5em;
    color: #8B4513;
    margin-bottom: 15px;
}

.spirit-card h4 {
    color: #333;
    margin: 10px 0;
    font-size: 1.5em;
}

.heritage-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 20px 0;
}

.heritage-item {
    background: #f9f9f9;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.heritage-item h4 {
    color: #8B4513;
    margin-bottom: 15px;
}

.heritage-item ul {
    list-style-type: none;
    padding-left: 0;
}

.heritage-item li {
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}

.heritage-item li:before {
    content: "•";
    color: #8B4513;
    position: absolute;
    left: 0;
}

/* 健康价值样式 */
.nutrition-table {
    margin: 30px 0;
    overflow-x: auto;
}

.nutrition-table table {
    width: 100%;
    border-collapse: collapse;
}

.nutrition-table th {
    background: #8B4513;
    color: white;
    padding: 15px;
    text-align: left;
}

.nutrition-table td {
    padding: 15px;
    border-bottom: 1px solid #eee;
}

.aged-tea-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 30px 0;
}

.aged-tea-card {
    background: #fff;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}

.mechanism {
    margin: 20px 0;
}

.process-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
}

.process-step {
    background: #f0f0f0;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9em;
}

.process-result {
    text-align: center;
    color: #8B4513;
    font-style: italic;
}

.storage-tips {
    list-style: none;
    padding: 0;
}

.storage-tips li {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.storage-tips i {
    color: #8B4513;
    margin-right: 10px;
    font-size: 1.2em;
}

/* 响应式优化 */
@media (max-width: 768px) {
    .spirit-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-item {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .process-step {
        margin: 5px;
    }
}

@media (max-width: 480px) {
    .spirit-grid {
        grid-template-columns: 1fr;
    }
}

/* 功能入口样式 */
.feature-entries {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 50px 0;
}

.feature-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
    display: flex;
    padding: 25px;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 30px rgba(0,0,0,0.15);
}

.card-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: rgba(139, 69, 19, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 20px;
}

.card-icon i {
    font-size: 30px;
    color: #8B4513;
}

.card-content {
    flex-grow: 1;
}

.card-content h3 {
    color: #333;
    margin: 0 0 10px 0;
    font-size: 1.2em;
}

.card-content p {
    color: #666;
    font-size: 0.9em;
    margin: 0 0 15px 0;
    line-height: 1.5;
}

.learn-more {
    color: #8B4513;
    font-size: 0.9em;
    display: flex;
    align-items: center;
    gap: 5px;
}

.learn-more i {
    transition: transform 0.3s;
}

.feature-card:hover .learn-more i {
    transform: translateX(5px);
}

/* 响应式优化 */
@media (max-width: 768px) {
    .feature-entries {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .feature-card {
        padding: 20px;
    }
    
    .card-icon {
        width: 50px;
        height: 50px;
    }
    
    .card-icon i {
        font-size: 25px;
    }
}

@media (max-width: 480px) {
    .feature-entries {
        grid-template-columns: 1fr;
    }
}

/* 返回按钮样式 */
.back-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: #8B4513;
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 25px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.back-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(139, 69, 19, 0.4);
}

/* 历史部分样式 */
#history {
    scroll-margin-top: 20px;
}