/* 主题变量 */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #f0f0f0;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --border-color: #e0e0e0;
    --primary-color: #3498db;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.15);
}

[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3d3d3d;
    --text-primary: #f0f0f0;
    --text-secondary: #b0b0b0;
    --text-tertiary: #808080;
    --border-color: #404040;
}

/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 收藏按钮样式 */
.favorite-btn {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
    margin-top: 10px;
    align-self: flex-start;
}

.favorite-btn:hover {
    background-color: var(--primary-color);
    color: white;
}

.favorite-btn i {
    margin-right: 5px;
}

/* 深色主题下的收藏按钮 */
[data-theme="dark"] .favorite-btn {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

[data-theme="dark"] .favorite-btn:hover {
    background-color: var(--primary-color);
    color: white;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
}

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

/* 导航栏 */
.navbar {
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

[data-theme="dark"] .navbar {
    border-bottom: 1px solid var(--border-color);
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: inherit;
}

.logo-text {
    font-size: 24px;
    font-weight: bold;
    color: #2c3e50;
}

[data-theme="dark"] .logo-text {
    color: #f0f0f0;
}

.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.theme-toggle-btn:hover {
    background-color: var(--bg-tertiary);
}

/* 右侧关于链接 */
.nav-about-link {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 6px;
    transition: background-color 0.3s;
    margin-right: 8px;
}

.nav-about-link:hover {
    background-color: var(--bg-tertiary);
}

.nav-about-link.active {
    color: var(--primary-color);
}

.mobile-menu-toggle {
    display: none;
    order: 3;
}

.theme-icon {
    font-size: 20px;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.nav-container .logo-link {
    order: 1;
}

.nav-links-center {
    order: 2;
}

.theme-toggle-btn {
    order: 3;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #2c3e50;
}

[data-theme="dark"] .logo {
    color: #f0f0f0;
}

.nav-links-center {
    display: flex;
    list-style: none;
}

.nav-links-center li {
    margin: 0 15px;
}

.nav-links-center a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links-center a:hover {
    color: #3498db;
}

.dropdown {
    position: relative;
}

.dropdown-toggle {
    cursor: pointer;
    display: flex;
    align-items: center;
}

.dropdown-toggle::after {
    content: '▼';
    font-size: 10px;
    margin-left: 5px;
    transition: transform 0.3s;
}

.dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    padding: 10px 0;
    min-width: 150px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s;
    z-index: 1000;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    display: block;
    padding: 8px 15px;
    color: #333;
    text-decoration: none;
    transition: background-color 0.3s;
}

.dropdown-menu a:hover {
    background-color: #f5f5f5;
}

/* 面包屑导航 */
.breadcrumb {
    background-color: #f9f9f9;
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

.breadcrumb-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    font-size: 14px;
}

.breadcrumb-item {
    color: #666;
    text-decoration: none;
    margin-right: 10px;
}

.breadcrumb-item.current {
    color: #333;
    font-weight: 500;
}

.breadcrumb-separator {
    margin-right: 10px;
    color: #999;
}

/* 英雄区域 */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 60px 0;
    text-align: center;
}

.hero-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-container h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: bold;
}

.hero-container p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.search-box {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    border-radius: 25px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.search-box input {
    flex: 1;
    padding: 15px 20px;
    border: none;
    font-size: 16px;
    outline: none;
}

.search-box button {
    background-color: #3498db;
    color: #fff;
    border: none;
    padding: 15px 30px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.search-box button:hover {
    background-color: #2980b9;
}

/* 过滤区域 */
.filter-section {
    background-color: #fff;
    padding: 20px 0;
    border-bottom: 1px solid #eee;
}

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

.filter-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    align-items: center;
}

@media (max-width: 480px) {
    .filter-section {
        padding: 12px 0;
    }
    
    .filter-tabs {
        gap: 6px;
    }
    
    .filter-tab {
        font-size: 12px;
        padding: 5px 10px;
        height: 32px;
    }
}

.filter-tab {
    padding: 8px 16px;
    border: 1px solid #ddd;
    border-radius: 20px;
    background-color: #f9f9f9;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 14px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
}

.filter-tab:hover {
    background-color: #f0f0f0;
}

.filter-tab.active {
    background-color: #3498db;
    color: #fff;
    border-color: #3498db;
}

/* 列表区域 */
.list-section,
.favorites-section {
    padding: 40px 0;
    flex-grow: 1;
}

.list-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
    box-sizing: border-box;
}

.section-title {
    font-size: 28px;
    margin-bottom: 30px;
    text-align: center;
    color: #2c3e50;
    max-width: 100%;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.list-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.favorites-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.list-card {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.list-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.list-card a {
    text-decoration: none;
    color: #333;
    display: block;
}

.list-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background-color: #F0F0F0;
}

.list-card-content {
    padding: 20px;
}

.list-card-title {
    font-size: 20px;
    margin-bottom: 10px;
    color: #2c3e50;
}

.list-card-scientific {
    font-size: 14px;
    color: #7f8c8d;
    margin-bottom: 15px;
    font-style: italic;
}

.list-card-description {
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 15px;
    color: #666;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.list-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    padding: 4px 12px;
    border-radius: 12px;
    background-color: #f0f0f0;
    font-size: 12px;
    color: #666;
}

/* 详情页面 */
.detail-section {
    padding: 40px 0;
}

.detail-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.detail-header {
    text-align: center;
    margin-bottom: 40px;
}

.detail-title {
    font-size: 36px;
    margin-bottom: 10px;
    color: #2c3e50;
}

.detail-scientific {
    font-size: 18px;
    color: #7f8c8d;
    margin-bottom: 20px;
    font-style: italic;
}

.detail-status {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.status-badge {
    padding: 6px 12px;
    border-radius: 12px;
    background-color: #e74c3c;
    color: #fff;
    font-size: 14px;
}

.category-badge {
    padding: 6px 12px;
    border-radius: 12px;
    background-color: #3498db;
    color: #fff;
    font-size: 14px;
}

.detail-image-container {
    text-align: center;
    margin-bottom: 40px;
}

.detail-image-container img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.detail-info,
.detail-description,
.detail-traits,
.detail-diet,
.detail-fun-fact,
.detail-tags,
.detail-related {
    background-color: #fff;
    border-radius: 8px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.info-section-title {
    font-size: 24px;
    margin-bottom: 20px;
    color: #2c3e50;
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.info-card {
    background-color: var(--bg-primary);
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s;
}

.info-card:hover {
    transform: translateY(-3px);
}

.info-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.info-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.knowledge-card {
    background-color: var(--bg-primary);
    border-radius: 12px;
    padding: 28px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s;
}

.knowledge-card:hover {
    transform: translateY(-3px);
}

.knowledge-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text-primary);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.knowledge-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.knowledge-card strong {
    color: var(--text-primary);
}

.info-item {
    margin-bottom: 15px;
}

.info-label {
    font-weight: 500;
    color: #2c3e50;
    margin-right: 10px;
}

.info-value {
    color: #666;
}

.traits-list {
    list-style: none;
    padding: 0;
}

.traits-list li {
    padding: 8px 0;
    border-bottom: 1px solid #f0f0f0;
}

.traits-list li:last-child {
    border-bottom: none;
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.related-card {
    background-color: #f9f9f9;
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s;
    text-decoration: none;
    color: #333;
}

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

.related-card img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    background-color: #F0F0F0;
}

.related-card h3 {
    font-size: 16px;
    margin: 15px 15px 5px;
    color: #2c3e50;
}

.related-card p {
    font-size: 12px;
    color: #7f8c8d;
    margin: 0 15px 15px;
    font-style: italic;
}

.no-related {
    text-align: center;
    color: #999;
    padding: 20px 0;
}

/* 加载和错误状态 */
.loading {
    text-align: center;
    padding: 50px 0;
    color: #666;
    font-size: 18px;
}

.no-results {
    text-align: center;
    padding: 50px 0;
    color: #666;
    font-size: 18px;
}

/* 动画效果 */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 页脚 */
.footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 30px 0;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 响应式设计 - 移动端导航 */
@media (max-width: 768px) {
    .container,
    .hero-container,
    .list-container,
    .filter-container,
    .breadcrumb-container,
    .detail-container {
        max-width: 100%;
        padding-left: 16px;
        padding-right: 16px;
        box-sizing: border-box;
    }
    
    .nav-container {
        flex-wrap: wrap;
        height: auto;
        padding: 10px 15px;
        position: relative;
        justify-content: flex-start;
        gap: 10px;
        max-width: 100%;
        box-sizing: border-box;
    }
    
    .nav-container .logo-link {
        flex: 1;
    }
    
    .nav-links-center {
        display: none;
        width: 100%;
        flex-direction: column;
        margin-top: 10px;
        padding: 10px 0;
        border-top: 1px solid var(--border-color);
        order: 4;
    }
    
    .nav-links-center.show {
        display: flex;
    }
    
    .nav-links-center li {
        margin: 5px 0;
    }
    
    .nav-links-center > li > a {
        display: block;
        padding: 10px 15px;
        border-radius: 6px;
    }
    
    .nav-links-center > li > a:active {
        background-color: var(--bg-tertiary);
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding: 0 0 0 20px;
        margin-top: 5px;
        display: none;
        background-color: var(--bg-secondary);
        border-radius: 6px;
    }
    
    .dropdown-menu.show {
        display: block;
    }
    
    .dropdown-menu li {
        margin: 0;
    }
    
    .dropdown-menu a {
        padding: 8px 15px;
        font-size: 14px;
    }
    
    /* 移动端菜单按钮 */
    .mobile-menu-toggle {
        display: flex !important;
    }
    
    .nav-about-link {
        font-size: 14px;
        padding: 4px 10px;
        margin-right: 4px;
    }
    
    .hero-container h1 {
        font-size: 32px;
    }
    
    .hero-container p {
        font-size: 16px;
    }
    
    .search-box {
        flex-direction: column;
        border-radius: 8px;
    }
    
    .search-box input,
    .search-box button {
        border-radius: 0;
        width: 100%;
    }
    
    .filter-tabs {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .filter-tab {
        font-size: 13px;
        padding: 6px 14px;
    }
    
    .list-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .list-card img {
        height: 120px;
    }
    
    .list-card-content {
        padding: 12px;
    }
    
    .list-card-title {
        font-size: 16px;
    }
    
    .favorites-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .detail-title {
        font-size: 24px;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .knowledge-grid {
        grid-template-columns: 1fr;
    }
    
    .related-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
        font-size: 18px;
        z-index: 9999;
    }
    
    .section-title {
        text-align: left;
        font-size: 22px;
        margin-bottom: 20px;
        padding-left: 4px;
    }
    
    .featured-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .stat-number {
        font-size: 28px;
    }
    
    .random-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .random-card-img-wrapper {
        height: 100px;
    }
    
    .funfact-card {
        padding: 20px;
        flex-direction: column;
    }
    
    .funfact-icon {
        font-size: 36px;
    }
    
    .suggestion-form select,
    .suggestion-form textarea {
        font-size: 16px;
    }
    
    .featured-card {
        padding: 20px 15px;
    }
    
    .detail-wrapper {
        grid-template-columns: 1fr;
    }
    
    .detail-image img {
        height: 250px;
    }
    
    .tips-section {
        grid-template-columns: 1fr;
    }
    
    .taxonomy-table {
        font-size: 12px;
    }
    
    .taxonomy-table th,
    .taxonomy-table td {
        padding: 8px 4px;
    }
}

@media (max-width: 480px) {
    .hero-container h1 {
        font-size: 24px;
    }
    
    .hero-container p {
        font-size: 14px;
    }
    
    .list-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .list-card img {
        height: 180px;
    }
    
    .favorites-content {
        grid-template-columns: 1fr;
    }
    
    .featured-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .stat-card {
        padding: 15px 10px;
    }
    
    .stat-number {
        font-size: 24px;
    }
    
    .random-grid {
        grid-template-columns: 1fr;
    }
    
    .detail-info,
    .detail-description,
    .detail-traits,
    .detail-diet,
    .detail-fun-fact,
    .detail-tags,
    .detail-related {
        padding: 15px;
    }
    
    .seasonal-items-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .month-card {
        padding: 15px;
    }
    
    .seasonal-item-image-wrapper {
        height: 80px;
    }
}

/* 面包屑导航 */
.breadcrumb {
    background-color: var(--bg-primary);
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    font-size: 14px;
    flex-wrap: wrap;
}

.breadcrumb-item {
    color: var(--text-secondary);
    text-decoration: none;
    margin-right: 8px;
}

.breadcrumb-item:hover {
    color: var(--primary-color);
}

.breadcrumb-item.current {
    color: var(--text-primary);
    font-weight: 500;
}

.breadcrumb-separator {
    margin-right: 8px;
    color: var(--text-tertiary);
}

/* 详情页面 */
.detail-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.detail-image {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.detail-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    background-color: var(--bg-tertiary);
}

.detail-info {
    display: flex;
    flex-direction: column;
    background-color: var(--bg-primary);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow-md);
}

.detail-title {
    font-size: 36px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 20px;
}

.detail-meta-item {
    color: var(--text-secondary);
}

.detail-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.detail-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: auto;
}

.back-btn,
.detail-favorite-btn,
.detail-share-btn,
.detail-print-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
}

.back-btn {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.detail-favorite-btn {
    background-color: var(--danger-color);
    color: white;
}

.detail-share-btn {
    background-color: var(--primary-color);
    color: white;
}

.detail-print-btn {
    background-color: var(--success-color);
    color: white;
}

.back-btn:hover,
.detail-favorite-btn:hover,
.detail-share-btn:hover,
.detail-print-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 科学分类 */
.taxonomy-section {
    background-color: var(--bg-primary);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-md);
}

.taxonomy-table-container {
    overflow-x: auto;
}

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

.taxonomy-table th,
.taxonomy-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.taxonomy-table th {
    background-color: var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-primary);
}

.taxonomy-table td {
    color: var(--text-secondary);
}

/* 提示卡片 */
.tips-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.tip-card {
    background-color: var(--bg-primary);
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow-md);
}

.tip-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.tip-content {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 相关推荐 */
.related-section {
    padding: 40px 0;
    background-color: var(--bg-tertiary);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

/* 首页统计区 */
.stats-section {
    padding: 40px 0;
    background-color: var(--bg-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.section-wrapper {
    width: 100%;
    max-width: 100%;
}

.stat-card {
    text-align: center;
    padding: 25px 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    color: white;
}

.stat-number {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    opacity: 0.9;
}

/* 探索分类 */
.featured-section {
    padding: 60px 0;
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.featured-card {
    background-color: var(--bg-primary);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
}

.featured-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.featured-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.featured-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.featured-card p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 首页随机物种推荐 */
.random-section {
    padding: 60px 0;
    background-color: var(--bg-secondary);
}

.random-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.random-card {
    background-color: var(--bg-primary);
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
}

.random-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.random-card-img-wrapper {
    width: 100%;
    height: 160px;
    overflow: hidden;
}

.random-card-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.random-card-content {
    padding: 15px;
}

.random-card-title {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.random-card-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 首页每日科普 */
.funfact-section {
    padding: 60px 0;
}

/* 关于页面 */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 0;
}

.about-card {
    background-color: var(--bg-primary);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}

.about-card h2 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.about-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.about-feature {
    display: flex;
    gap: 15px;
    align-items: flex-start;
    padding: 12px;
    background-color: var(--bg-secondary);
    border-radius: 8px;
}

.about-feature-icon {
    font-size: 32px;
    flex-shrink: 0;
    width: 48px;
    text-align: center;
}

.about-feature h3 {
    font-size: 16px;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.about-feature p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.about-card a {
    color: var(--primary-color);
    text-decoration: none;
}

/* 建议反馈表单 */
.suggestion-form {
    margin-top: 15px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: inherit;
}

.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.suggestion-submit {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 15px;
    cursor: pointer;
    transition: background-color 0.3s;
    width: 100%;
}

.suggestion-submit:hover {
    background-color: #2980b9;
}

.form-tip {
    font-size: 12px;
    color: var(--text-tertiary);
    text-align: center;
    margin-top: 8px;
}

.funfact-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 16px;
    padding: 40px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
    box-shadow: var(--shadow-lg);
}

.funfact-icon {
    font-size: 48px;
    flex-shrink: 0;
}

.funfact-content {
    font-size: 16px;
    line-height: 1.8;
}

.funfact-content strong {
    color: #ffd700;
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s;
    z-index: 9999;
}

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

/* 页脚 */
.footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 40px 0 20px;
    text-align: center;
    flex-shrink: 0;
}

[data-theme="dark"] .footer {
    background-color: #1a1a1a;
    border-top: 1px solid var(--border-color);
}

.footer-copyright {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-disclaimer {
    margin-top: 15px;
    font-size: 13px;
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
}

[data-theme="dark"] .footer-disclaimer {
    color: var(--text-tertiary);
}

/* 英雄区域 */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 0;
    text-align: center;
    flex-grow: 1;
}

.hero-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-container h1 {
    font-size: 32px;
    margin-bottom: 10px;
    font-weight: bold;
}

.hero-container p {
    font-size: 16px;
    margin-bottom: 20px;
    opacity: 0.9;
}

/* 搜索框 */
.search-box {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    border-radius: 25px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    background-color: white;
}

[data-theme="dark"] .search-box {
    background-color: var(--bg-primary);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

.search-box input {
    flex: 1;
    padding: 15px 20px;
    border: none;
    font-size: 16px;
    outline: none;
    background-color: transparent;
    color: var(--text-primary);
}

.search-box button {
    background-color: #3498db;
    color: #fff;
    border: none;
    padding: 15px 30px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.search-box button:hover {
    background-color: #2980b9;
}

/* 列表卡片图片高度调整 */
.list-card img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    background-color: var(--bg-tertiary);
}

/* 下拉菜单分隔线 */
.dropdown-menu .divider {
    height: 1px;
    background-color: var(--border-color);
    margin: 8px 0;
}

/* 响应式详情页面 */
@media (max-width: 768px) {
    .detail-wrapper {
        grid-template-columns: 1fr;
    }
    
    .detail-image img {
        height: 300px;
    }
    
    .detail-title {
        font-size: 28px;
    }
    
    .tips-section {
        grid-template-columns: 1fr;
    }
}

/* 时令页面样式 */
.seasonal-calendar-section {
    padding: 60px 0;
    background-color: var(--bg-secondary);
}

.seasonal-calendar-header {
    text-align: center;
    margin-bottom: 40px;
}

.seasonal-calendar-header h1 {
    font-size: 36px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.seasonal-calendar-header p {
    font-size: 18px;
    color: var(--text-secondary);
}

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

.month-card {
    background-color: var(--bg-primary);
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
}

.month-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.month-header h2 {
    font-size: 24px;
    color: var(--text-primary);
    margin: 0;
}

.season-tag {
    background-color: #3498db;
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: bold;
}

.seasonal-category {
    margin-bottom: 30px;
}

.seasonal-category h3 {
    font-size: 18px;
    color: var(--text-primary);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.seasonal-category h3 i {
    margin-right: 10px;
    color: #3498db;
}

.seasonal-items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
}

.seasonal-item-card {
    background-color: var(--bg-secondary);
    border-radius: 8px;
    padding: 15px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--border-color);
}

.seasonal-item-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.seasonal-item-image-wrapper {
    width: 100%;
    height: 100px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f5f5f5;
    border-radius: 8px;
    overflow: hidden;
}

.seasonal-item-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
    background-color: #fff;
}

.seasonal-item-icon {
    font-size: 48px;
    margin-bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

.seasonal-item-name {
    font-size: 16px;
    color: var(--text-primary);
    font-weight: 500;
}

/* 月份导航 */
.floating-month-nav {
    position: fixed;
    left: 30px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 100;
}

.floating-month-nav-item {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-primary);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s;
    color: var(--text-primary);
    font-weight: bold;
}

.floating-month-nav-item:hover {
    background-color: #3498db;
    color: white;
    transform: scale(1.1);
}

.floating-month-nav-item.active {
    background-color: #3498db;
    color: white;
    border-color: #3498db;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .seasonal-items-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .floating-month-nav {
        left: 15px;
    }
}

@media (max-width: 768px) {
    .seasonal-items-grid {
        grid-template-columns: 1fr;
    }
    
    .floating-month-nav {
        position: relative;
        left: auto;
        top: auto;
        transform: none;
        flex-direction: row;
        justify-content: center;
        margin-bottom: 30px;
        flex-wrap: wrap;
    }
    
    .month-card {
        padding: 20px;
    }
    
    .seasonal-calendar-header h1 {
        font-size: 28px;
    }
}

/* 固定页脚样式 */
.footer {
    background-color: #2c3e50 !important;
    color: #fff !important;
    padding: 40px 0 20px !important;
    text-align: center !important;
    position: relative !important;
    bottom: 0 !important;
    width: 100% !important;
}

.footer-content {
    margin-bottom: 20px !important;
}

.footer-copyright {
    padding-top: 20px !important;
    border-top: 1px solid rgba(255,255,255,0.1) !important;
}

.footer-disclaimer {
    margin-top: 15px !important;
    font-size: 13px !important;
    color: rgba(255,255,255,0.7) !important;
    line-height: 1.8 !important;
}

[data-theme="dark"] .footer-disclaimer {
    color: var(--text-tertiary) !important;
}

/* ============ 移动端覆盖修复（确保覆盖桌面样式） ============ */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px !important;
    }

    .featured-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px !important;
    }

    .list-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px !important;
    }

    .favorites-content {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px !important;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 10px !important;
    }

    .featured-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 10px !important;
    }
}

@media (max-width: 380px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 8px !important;
    }

    .stat-card {
        padding: 16px 10px !important;
    }

    .stat-number {
        font-size: 22px !important;
    }

    .stat-label {
        font-size: 12px !important;
    }
}