:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --text-color: #1f2937;
    --text-secondary: #4b5563;
    --bg-color: #ffffff;
    --bg-secondary: #f9fafb;
    --border-color: #e5e7eb;
    --hover-color: #f3f4f6;
    --nav-bg: rgba(255, 255, 255, 0.9);
    --nav-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --card-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --card-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    overflow-y: scroll; /* 始终显示垂直滚动条，防止导航栏左移 */
}

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

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
    transform: translateY(0);
}

.navbar.hidden {
    transform: translateY(-100%);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    letter-spacing: -0.025em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-brand i {
    font-size: 1.25rem;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.2s ease;
    font-weight: 500;
    font-size: 0.9375rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links a i {
    font-size: 1rem;
    width: 1rem;
    text-align: center;
}

.nav-links a:hover {
    background-color: var(--hover-color);
    color: var(--primary-color);
}

.nav-links a.active {
    color: var(--primary-color);
    background-color: var(--hover-color);
}

.nav-links a.rss-link {
    color: #f97316;
}

.nav-links a.rss-link:hover {
    color: #ea580c;
    background-color: #fff7ed;
}

/* 主要内容区样式 */
.main-content {
    padding: 2rem 0;
    max-width: 1200px;
    margin: 6rem auto 0;
}

/* 文章列表样式 */
.articles-container {
    display: grid;
    gap: 2rem;
}

.article-card {
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.3s ease;
    background: var(--bg-color);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.article-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

.article-date {
    white-space: nowrap;
    display: flex;
    align-items: center;
}

.article-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin: 0;
    align-items: center;
}

.article-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-color);
    line-height: 1.4;
    letter-spacing: -0.025em;
}

.article-title a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.article-title a:hover {
    color: var(--primary-color);
}

.article-description {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.9375rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    margin-top: 0.5rem;
    transition: all 0.3s ease;
    align-self: flex-start;
}

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

.read-more:hover {
    color: var(--primary-hover);
}

.read-more:hover i {
    transform: translateX(4px);
}

.tag {
    background-color: var(--bg-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8125rem;
    color: var(--primary-color);
    transition: all 0.2s ease;
    border: 1px solid var(--border-color);
    line-height: 1.2;
    display: inline-flex;
    align-items: center;
}

.tag:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 分页控件样式 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 3rem;
    padding: 1.5rem 0;
}

.pagination button {
    padding: 0.625rem 1.25rem;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.pagination button:hover {
    background-color: var(--hover-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.pagination button.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 页脚样式 */
.footer {
    margin-top: 4rem;
    padding: 2rem 0;
    background-color: var(--bg-color);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
    color: #6b7280;
    font-size: 0.875rem;
}

/* 标签页面样式 */
.page-title {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.page-title i {
    color: var(--primary-color);
}

.tags-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.tag-card {
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.2s;
}

.tag-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.tag-name {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.tag-count {
    font-size: 0.875rem;
    color: #666;
}

.tag-articles {
    margin-top: 1rem;
    font-size: 0.875rem;
}

.tag-article {
    margin-bottom: 0.5rem;
}

.tag-article a {
    color: var(--text-color);
    text-decoration: none;
}

.tag-article a:hover {
    color: var(--primary-color);
}

/* 工具页面样式 */
.tools-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.tool-card {
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.3s ease;
    background: var(--bg-color);
    display: flex;
    flex-direction: column;
    min-height: 200px;
    position: relative;
}

.tool-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.tool-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-color);
    letter-spacing: -0.025em;
    padding-right: 2rem;
}

/* GitHub 图标样式 */
.tool-github {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    color: var(--text-secondary);
    font-size: 1.25rem;
    transition: all 0.2s ease;
    z-index: 1;
}

.tool-github:hover {
    color: #24292e;
    transform: scale(1.1);
}

.tool-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    flex-grow: 1;
}

.tool-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: all 0.3s ease;
    align-self: flex-start;
    margin-top: auto;
}

.tool-link i {
    transition: transform 0.3s ease;
}

.tool-link:hover {
    color: var(--primary-hover);
}

.tool-link:hover i {
    transform: translateX(4px);
}

.no-tools {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* 搜索框样式 */
.search-container {
    position: relative;
    margin-bottom: 2rem;
}

.search-box {
    width: 100%;
    padding: 0.75rem 1rem;
    padding-left: 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9375rem;
    transition: all 0.2s ease;
    background-color: var(--bg-color);
}

.search-box:focus {
    outline: none;
    border-color: var(--primary-color);
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

/* 标签云样式 */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.tag-cloud .tag {
    cursor: pointer;
    transition: all 0.2s ease;
}

.tag-cloud .tag.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 搜索结果高亮 */
.highlight {
    background-color: rgba(59, 130, 246, 0.2);
    color: var(--primary-color);
    font-weight: 500;
    padding: 0.1em 0.2em;
    border-radius: 2px;
}

/* 文章列表布局 */
.articles-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
}

.articles-sidebar {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    height: fit-content;
}

@media (max-width: 1024px) {
    .articles-layout {
        grid-template-columns: 1fr;
    }

    .articles-sidebar {
        order: -1;
        margin-bottom: 2rem;
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    .nav-container {
        padding: 0.75rem 1rem;
        height: auto;
        position: relative;
    }

    .navbar {
        height: auto;
    }

    .nav-brand {
        font-size: 1.25rem;
        white-space: nowrap;
        max-width: 80%; /* 确保品牌名称不会占据太多空间 */
    }

    /* 移动端默认隐藏导航链接 */
    .nav-links {
        position: fixed;
        top: 4.5rem;
        left: 0;
        right: 0;
        background: var(--nav-bg);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        flex-direction: column;
        align-items: flex-start;
        padding: 0;
        gap: 0;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-150%);
        opacity: 0;
        transition: all 0.3s ease;
        z-index: 999;
        height: 0;
        overflow: hidden;
        box-shadow: var(--nav-shadow);
        visibility: hidden;
        display: none; /* 默认不显示 */
    }

    /* 点击汉堡菜单按钮后显示导航链接 */
    .nav-links.show {
        transform: translateY(0);
        opacity: 1;
        height: auto;
        padding: 1rem;
        visibility: visible;
        display: flex;
        max-height: calc(100vh - 4.5rem);
        overflow-y: auto;
    }

    .nav-links a {
        width: 100%;
        padding: 0.75rem;
        font-size: 1rem;
        white-space: normal;
    }

    .nav-links a i {
        font-size: 0.875rem;
    }

    .nav-brand i {
        font-size: 1rem;
    }

    .main-content {
        margin-top: 4.5rem;
        padding: 1rem 0;
    }

    .footer {
        margin-top: 2rem;
        padding: 1rem 0;
    }

    .page-title {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .tag-card {
        padding: 0.75rem;
    }

    .tools-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .tool-card {
        padding: 1rem;
        min-height: 180px;
    }

    .tool-title {
        font-size: 1.1rem;
    }

    .tool-description {
        font-size: 0.875rem;
        margin-bottom: 1rem;
    }

    .tool-link {
        padding: 0.5rem 0.75rem;
        font-size: 0.875rem;
    }

    .search-container {
        margin-bottom: 1rem;
    }

    .tag-cloud {
        margin-bottom: 1rem;
    }

    .articles-container {
        gap: 1rem;
    }

    .category-title {
        font-size: 1.3rem;
    }

    .mobile-menu-toggle:active {
        transform: translateY(-50%) scale(0.95);
    }

    .category-list {
        display: flex;
        flex-direction: column;
        overflow-x: visible;
        padding-bottom: 8px;
        gap: 8px;
    }
    .category-group {
        width: 100%;
    }
    .subcategory-list {
        width: 100%;
    }
    .category-item {
        margin: 0;
        font-size: 0.95rem;
        white-space: nowrap;
        padding: 8px 12px;
        border: 1px solid var(--border-color);
        background-color: #fff;
        border-radius: 8px;
        margin-bottom: 6px;
    }
    /* 只为一级分类保留卡片样式，子分类无边框、无背景、无圆角 */
    .category-item[data-level]:not([data-level="0"]):not([data-level="1"]) {
        border: none;
        background: none;
        border-radius: 0;
        margin-bottom: 2px;
        padding-left: 0;
    }
    /* 新增：为不同层级的分类增加缩进 */
    .category-group {
        margin-left: 0;
    }
    .category-group[data-level="1"] {
        margin-left: 16px;
    }
    .category-group[data-level="2"] {
        margin-left: 32px;
    }
    .category-group[data-level="3"] {
        margin-left: 48px;
    }
    .category-group[data-level="4"] {
        margin-left: 64px;
    }
    /* 让子分类的间距更明显 */
    .subcategory-list {
        margin-top: 2px;
        margin-bottom: 2px;
    }
    /* 在移动端，二级及以下分类选中时不显示背景色和边框，仅字体高亮 */
    .category-item[data-level]:not([data-level="1"]).active {
        background: none !important;
        border: none !important;
        color: var(--primary-color) !important;
    }
    .category-item[data-level]:not([data-level="1"]).active i {
        color: var(--primary-color) !important;
    }
}

/* 资源页面样式 */
.resources-container {
    display: grid;
    gap: 2rem;
}

.resource-section {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
}

.resource-section h2 {
    color: var(--text-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.resource-section h2 i {
    color: var(--primary-color);
}

.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
    align-items: stretch;
}

.resource-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.resource-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.resource-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.resource-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.resource-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.resource-tag {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
}

.resource-content {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    margin-top: 1rem;
    font-family: monospace;
    white-space: pre-wrap;
    word-wrap: break-word;
    word-break: break-word;
    font-size: 0.9rem;
    color: var(--text-color);
    height: 200px;
    width: 100%;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) var(--bg-secondary);
    position: relative;
    box-sizing: border-box;
}

.resource-content pre {
    margin: 0;
    padding: 0;
    white-space: pre-wrap;
    word-wrap: break-word;
    word-break: break-word;
    font-family: inherit;
}

.resource-content code {
    white-space: pre-wrap;
    word-wrap: break-word;
    word-break: break-word;
    font-family: inherit;
}

/* 自定义滚动条样式 */
.resource-content::-webkit-scrollbar {
    width: 8px;
    height: 0;
}

.resource-content::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}

.resource-content::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

.resource-content::-webkit-scrollbar-thumb:hover {
    background: var(--primary-hover);
}

.copy-button {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.resource-content:hover .copy-button {
    opacity: 1;
}

.copy-button:hover {
    background: var(--primary-hover);
}

.copy-button.copied {
    background: #10b981;
}

.copy-button i {
    font-size: 0.9rem;
}

/* URL复制按钮样式 */
.url-copy-button {
    position: absolute;
    top: 0.5rem;
    right: 12rem;
    background: var(--bg-secondary);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    opacity: 0;
    transition: all 0.2s ease;
    z-index: 1;
}

.resource-content:hover .url-copy-button {
    opacity: 1;
}

.url-copy-button:hover {
    background: var(--hover-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.url-copy-button.copied {
    background: #10b981;
    color: white;
    border-color: #10b981;
}

/* 预览按钮样式 */
.preview-button {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: var(--bg-secondary);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    opacity: 0;
    transition: all 0.2s ease;
    z-index: 1;
}

.resource-content:hover .preview-button {
    opacity: 1;
}

.preview-button:hover {
    background: var(--hover-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* 弹窗样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.show {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: var(--bg-color);
    border-radius: 8px;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    margin: auto;
    position: relative;
    display: flex;
    flex-direction: column;
    transform: translateY(-20px);
    transition: transform 0.3s ease;
    border: 1px solid var(--border-color);
}

.modal.show .modal-content {
    transform: translateY(0);
}

.modal-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-color);
}

.modal-actions {
    display: flex;
    gap: 0.5rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: var(--hover-color);
    color: var(--text-color);
}

.modal-body {
    padding: 1rem;
    overflow-y: auto;
    flex-grow: 1;
}

.modal-body pre {
    margin: 0;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 6px;
    overflow-x: hidden;
    white-space: pre-wrap;
    word-wrap: break-word;
    word-break: break-word;
    border: 1px solid var(--border-color);
}

.modal-body code {
    font-family: monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    white-space: pre-wrap;
    word-wrap: break-word;
    word-break: break-word;
}

/* 弹窗中的按钮样式 */
.modal-button {
    background: var(--bg-secondary);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    transition: all 0.2s ease;
}

.modal-button:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.modal-button.copied {
    background: #10b981;
    color: white;
    border-color: #10b981;
}

.modal-button i {
    font-size: 0.9rem;
}

/* JSON 语法高亮样式 */
.hljs {
    background: transparent !important;
    padding: 0 !important;
}

.hljs-attr {
    color: #0550ae !important;
}

.hljs-string {
    color: #0d7b6c !important;
}

.hljs-number {
    color: #0550ae !important;
}

.hljs-literal {
    color: #0550ae !important;
}

.hljs-punctuation {
    color: #24292e !important;
}

/* 收藏页面样式 */
.favorites-container {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

/* 收藏页搜索框样式 */
.favorites-search {
    margin-bottom: 20px;
}

.favorites-search .search-container {
    position: relative;
    display: flex;
    align-items: center;
}

.favorites-search .search-box {
    width: 100%;
    padding: 0.75rem 1rem;
    padding-left: 2.5rem;
    padding-right: 7.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9375rem;
    transition: all 0.2s ease;
    background-color: var(--bg-color);
}

.favorites-search .search-box:focus {
    outline: none;
    border-color: var(--primary-color);
}

.favorites-search .search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

/* 搜索引擎切换按钮 */
.search-engines {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    gap: 0.25rem;
    background-color: var(--bg-secondary);
    border-radius: 6px;
    padding: 0.25rem;
    border: 1px solid var(--border-color);
}

.search-engine-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 0.35rem 0.5rem;
    transition: all 0.2s ease;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-engine-btn:hover {
    background-color: var(--hover-color);
    color: var(--primary-color);
}

.search-engine-btn.active {
    background-color: var(--primary-color);
    color: white;
}

/* 移除旧的百度搜索按钮样式 */
.baidu-search-btn {
    display: none;
}

.categories-nav {
    flex: 0 0 200px;
    background-color: #fff;
    border-radius: 8px;
    padding: 15px;
    position: sticky;
    top: 20px;
    height: 400px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
}

.categories-nav h3 {
    margin-top: 0;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-color);
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.categories-nav h3 i {
    color: var(--primary-color);
}

.category-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.category-group {
    margin: 0;
    padding: 0;
}

.category-item {
    padding: 8px 10px;
    margin: 5px 0;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.category-item:hover {
    background-color: rgba(74, 137, 220, 0.1);
    color: var(--primary-color);
}

.category-item.active {
    background-color: var(--primary-color);
    color: white;
}

.category-item.active i {
    color: white;
}

.category-item i {
    width: 16px;
    text-align: center;
    color: var(--primary-color);
}

.toggle-icon {
    width: 16px;
    text-align: center;
    color: var(--text-secondary);
    transition: transform 0.2s ease;
}

.toggle-icon i {
    font-size: 0.8rem;
}

.subcategory-list {
    margin-left: 0;
    padding-left: 0;
}

.favorites-content {
    flex: 1;
    min-height: 400px;
}

.category-section {
    margin-bottom: 30px;
    animation: fadeIn 0.3s ease;
    background-color: #fff;
    border-radius: 8px;
    padding: 20px;
    border: 1px solid var(--border-color);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.category-title {
    padding-bottom: 10px;
    margin-bottom: 20px;
    color: var(--text-color);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.category-title i {
    color: var(--primary-color);
}

.favorite-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
}

/* 收藏卡片样式 */
.favorite-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 1rem;
    transition: all 0.2s ease;
    position: relative;
}

.favorite-card.pinned {
    border-color: var(--primary-color);
    background: linear-gradient(to right, var(--bg-color), var(--bg-secondary));
}

.pinned-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--primary-color);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.pinned-badge i {
    transform: rotate(-45deg);
}

.favorite-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.favorite-title {
    font-size: 1.1rem;
    margin: 0 0 10px 0;
    color: var(--text-color);
}

.favorite-description {
    color: var(--text-secondary);
    margin-bottom: 15px;
    font-size: 0.95rem;
    line-height: 1.5;
}

.favorite-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: all 0.3s ease;
    align-self: flex-start;
    margin-top: auto;
}

.favorite-link i {
    transition: transform 0.3s ease;
}

.favorite-link:hover {
    color: var(--primary-hover);
}

.favorite-link:hover i {
    transform: translateX(4px);
}

.no-favorites, .error-message {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
    font-size: 1.1rem;
    background-color: #fff;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.no-favorites i, .error-message i {
    font-size: 2rem;
    color: var(--text-secondary);
}

.no-favorites p {
    margin-bottom: 15px;
}

.search-external-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.search-external-btn:hover {
    background-color: var(--primary-hover);
}

.error-message i {
    color: #e74c3c;
}

.error-message {
    color: #e74c3c;
}

@media (max-width: 768px) {
    .favorites-container {
        flex-direction: column;
    }
    
    .favorites-search .search-box {
        padding: 0.6rem 1rem;
        padding-left: 2.25rem;
        padding-right: 7rem;
        font-size: 0.875rem;
    }
    
    .favorites-search .search-icon {
        font-size: 0.875rem;
    }
    
    .search-engines {
        right: 0.5rem;
        padding: 0.2rem;
        gap: 0.15rem;
    }
    
    .search-engine-btn {
        font-size: 0.8rem;
        padding: 0.3rem 0.4rem;
    }
    
    .categories-nav {
        flex: none;
        position: relative;
        top: 0;
        height: auto;
        max-height: none;
        margin-bottom: 20px;
        padding: 12px;
    }
    
    .categories-nav h3 {
        margin-bottom: 12px;
        font-size: 1rem;
    }
    
    .category-list {
        display: flex;
        flex-direction: column;
        overflow-x: visible;
        padding-bottom: 8px;
        gap: 8px;
    }
    
    .category-item {
        margin: 0;
        font-size: 0.9rem;
        white-space: nowrap;
        padding: 8px 12px;
        border: 1px solid var(--border-color);
        background-color: #fff;
    }
    
    .category-group {
        width: 100%;
    }
    
    .subcategory-list {
        width: 100%;
    }
    
    .category-title {
        font-size: 1.3rem;
    }
}

/* 汉堡菜单按钮 */
.mobile-menu-toggle {
    display: none; /* PC端默认隐藏 */
    background: var(--hover-color);
    border: 1px solid var(--border-color);
    color: var(--primary-color);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.2s ease;
    z-index: 1001;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
}

.mobile-menu-toggle:hover {
    background-color: var(--hover-color);
    border-color: var(--primary-color);
}

/* 确保在移动端显示汉堡菜单按钮 */
@media screen and (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex !important;
        position: absolute;
        right: 1rem;
        top: 50%;
        transform: translateY(-50%);
    }
}