/* 主题变量 */
:root {
    /* 主题色 */
    --primary-color: #ff2442;
    --primary-color-dark: #b31f35;
    --primary-color-shadow: rgba(254, 40, 67, 0.3);
    /* 文本颜色 */
    --text-color-primary: #333;
    --text-color-secondary: #5c5c5c;
    --text-color-tertiary: #858585;
    --text-color-quaternary: #bbbbbb;
    --text-color-inverse: #fff;
    --text-color-tag: #13386c;
    /* 背景颜色 */
    --bg-color-primary: #fff;
    --bg-color-secondary: #f7f7f7;
    --bg-color-tertiary: #e8e4e4;
    --bg-color-inverse: #474747;
    /* 边框颜色 */
    --border-color-primary: #ebebeb;
    --border-color-secondary: #eee;

    /* 禁用状态颜色 */
    --disabled-bg: #ccc;
    --disabled-text: #ffffff;

    /* 阴影颜色 */
    --shadow-color: rgba(0, 0, 0, 0.08);
    --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;

    /* 通用遮罩背景（半透明） */
    --overlay-bg: rgba(18, 18, 18, 0.5);

    /* 按钮文字颜色 */
    --button-text-color: #fff;

    /* 危险颜色 */
    --danger-color: #ff0c30;
    --danger-color-dark: rgb(201, 9, 37);
}

/* 深色主题 */
[data-theme="dark"] {
    /* 主题色 */
    --primary-color: #ff2442;
    --primary-color-dark: #b31f35;
    --primary-color-shadow: rgba(254, 40, 67, 0.3);

    /* 文本颜色 */
    --text-color-primary: #e0e0e0;
    --text-color-secondary: #b0b0b0;
    --text-color-tertiary: #909090;
    --text-color-quaternary: #707070;
    --text-color-inverse: #0a0a0a;
    --text-color-tag: #c7daef;

    /* 背景颜色 */
    --bg-color-primary: #121212;
    --bg-color-secondary: #1e1e1e;
    --bg-color-tertiary: #2a2a2a;
    --bg-color-inverse: #e7e7e7;

    /* 边框颜色 */
    --border-color-primary: #242424;
    --border-color-secondary: #252525;

    /* 禁用状态颜色 */
    --disabled-bg: #ccc;
    --disabled-text: #ffffff;

    /* 阴影颜色 */
    --shadow-color: rgba(0, 0, 0, 0.3);

    /* 通用遮罩背景（半透明） */
    --overlay-bg: rgba(27, 27, 27, 0.6);

    /* 按钮文字颜色 */
    --button-text-color: #fff;

    /* 危险颜色 */
    --danger-color: #ff0c30;
    --danger-color-dark: rgb(201, 9, 37);
}

/* 基础样式 */
* {
    -webkit-tap-highlight-color: transparent;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    font-family: var(--font-family);
    background-color: var(--bg-color-primary);
    color: var(--text-color-primary);
    overflow-x: hidden;
    width: 100vw;
    min-width: 100%;
    min-height: 100vh;
    max-width: 100vw;
}

body {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏遮罩层 */
.sidebar-mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--overlay-bg);
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.sidebar-mobile-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* 侧边栏 */
.sidebar {
    display: flex;
    flex-direction: column;
    width: 240px;
    background: var(--bg-color-primary);
    position: fixed;
    z-index: 100;
    left: max(calc(50% - 750px), 0px);
    top: 72px;
    height: calc(100vh - 72px);
    overflow-y: auto;
    padding: 16px;
    justify-content: space-between;
    transition: border-color .2s ease, background-color .2s ease, transform .3s ease, width .3s ease;
    border-right: 1px solid var(--border-color-primary);
    box-shadow: 2px 0 10px var(--shadow-color);
}

.sidebar-menu {
    flex: 1;
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-menu li {
    display: flex;
    align-items: center;
    font-size: 16px;
    font-weight: 600;
    height: 52px;
    margin-bottom: 8px;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.sidebar-menu li:hover {
    background-color: var(--bg-color-secondary);
}

.sidebar-footer-item {
    display: flex;
    align-items: center;
    font-size: 16px;
    font-weight: 600;
    height: 52px;
    margin-bottom: 8px;
    border-radius: 12px;
    list-style: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.sidebar-footer-item:hover {
    background: var(--bg-color-secondary);
}

.sidebar-link {
    display: flex;
    align-items: center;
    width: 100%;
    height: 100%;
    padding: 0 16px;
    color: var(--text-color-primary);
    text-decoration: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.sidebar-link:hover {
    background: var(--bg-color-secondary);
}

.sidebar-link.active {
    background: var(--bg-color-secondary);
    color: var(--primary-color);
}

.sidebar-footer-item .sidebar-link:hover {
    background: transparent;
}

.sidebar-icon {
    margin-right: 16px;
    display: flex;
    align-items: center;
    width: 24px;
    height: 24px;
    justify-content: center;
}

.avatar-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.sidebar-footer {
    margin-top: auto;
    margin-bottom: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color-primary);
}

.sidebar-label {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-color-primary);
}

/* 顶部导航栏 */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    background-color: var(--bg-color-primary);
    border-bottom: 1px solid var(--border-color-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 101;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.top-nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.top-nav-logo img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 2px 8px var(--shadow-color);
}

.top-nav-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-color-primary);
    letter-spacing: 0.5px;
}

.top-nav-search {
    flex: 1;
    max-width: 480px;
    margin: 0 30px;
}

.top-nav-search input {
    width: 100%;
    padding: 12px 20px;
    border: 1px solid var(--border-color-primary);
    border-radius: 24px;
    background-color: var(--bg-color-secondary);
    color: var(--text-color-primary);
    font-size: 14px;
    transition: all 0.3s ease;
}

.top-nav-search input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-color-shadow);
    transform: translateY(-1px);
}

.top-nav-actions {
    display: flex;
    gap: 16px;
}

.top-nav-action {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--bg-color-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.top-nav-action:hover {
    background-color: var(--bg-color-tertiary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.top-nav-action.notification::after {
    content: '';
    position: absolute;
    top: 8px;
    right: 8px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--primary-color);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--bg-color-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    align-items: center;
    justify-content: center;
}

.mobile-menu-btn:hover {
    background-color: var(--bg-color-tertiary);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    /* 移动端菜单按钮显示 */
    .mobile-menu-btn {
        display: flex;
    }
}

/* 主内容区域 */
.main-content {
    flex: 1;
    margin-left: 240px;
    padding: 24px;
    padding-top: 96px;
    min-height: 100vh;
}

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

/* 文章详情 */
.article-detail {
    background-color: var(--bg-color-primary);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color-primary);
    box-shadow: 0 4px 12px var(--shadow-color);
    padding: 32px;
    margin-bottom: 32px;
}

.article-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 2px solid var(--border-color-primary);
}

.article-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-color-primary);
    letter-spacing: 1px;
    margin-bottom: 20px;
    line-height: 1.3;
}

.article-meta {
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.article-category {
    display: inline-block;
    padding: 6px 16px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 600;
}

.article-meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--text-color-secondary);
}

.article-content {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-color-primary);
}

.article-content p {
    margin-bottom: 20px;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    margin: 24px 0;
    box-shadow: 0 4px 12px var(--shadow-color);
}

/* 侧边栏内容 */
.sidebar-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
}

.sidebar-card {
    background-color: var(--bg-color-primary);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color-primary);
    box-shadow: 0 4px 12px var(--shadow-color);
    padding: 24px;
}

.sidebar-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color-primary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color-primary);
}

.sidebar-card {
    background-color: var(--bg-color-primary);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color-primary);
    box-shadow: 0 4px 12px var(--shadow-color);
    padding: 20px;
}

.recent-articles-grid {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 12px !important;
    width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
}

.recent-article-card {
    background-color: var(--bg-color-secondary);
    border-radius: 12px;
    padding: 16px;
    transition: all 0.3s ease;
}

.recent-article-card:hover {
    background-color: var(--bg-color-tertiary);
    transform: translateY(-2px);
}

.recent-article-card h4 {
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 10px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.recent-article-card h4 a {
    text-decoration: none;
    color: var(--text-color-primary);
    transition: color 0.3s ease;
}

.recent-article-card h4 a:hover {
    color: var(--primary-color);
}

.recent-article-excerpt {
    font-size: 12px;
    color: var(--text-color-secondary);
    line-height: 1.5;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.no-articles {
    grid-column: span 2;
    text-align: center;
    padding: 24px;
    color: var(--text-color-tertiary);
    font-size: 14px;
}

.categories-list {
    list-style: none;
}

.category-item {
    margin-bottom: 12px;
}

.category-item a {
    text-decoration: none;
    color: var(--text-color-primary);
    transition: color 0.3s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.category-item a:hover {
    color: var(--primary-color);
    background-color: var(--bg-color-secondary);
}

.category-count {
    background: var(--bg-color-secondary);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    color: var(--text-color-tertiary);
}

/* 加载状态 */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 400px;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-color-primary);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 错误状态 */
.error {
    text-align: center;
    padding: 60px 20px;
    background-color: var(--bg-color-secondary);
    border-radius: 16px;
    margin: 40px 0;
}

.error h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.error p {
    color: var(--text-color-secondary);
    margin-bottom: 24px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border: 1px solid var(--border-color-primary);
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px var(--primary-color-shadow);
}

.btn-primary:hover {
    background-color: var(--primary-color-dark);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px var(--primary-color-shadow);
}

/* 响应式设计 */
@media (max-width: 768px) {
    /* 移动端侧边栏 */
    .sidebar {
        width: 260px;
        left: -260px;
        transform: translateX(0);
        box-shadow: 4px 0 20px var(--shadow-color);
    }

    .sidebar.mobile-open {
        transform: translateX(100%);
    }

    /* 主内容区域 */
    .main-content {
        margin-left: 0;
        padding: 16px;
        padding-top: 96px;
    }

    /* 顶部导航栏 */
    .top-nav {
        padding: 0 16px;
    }

    .top-nav-title {
        font-size: 18px;
    }

    .top-nav-search {
        display: none;
    }

    /* 文章详情 */
    .article-detail {
        padding: 24px;
    }

    .article-title {
        font-size: 24px;
    }

    .article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .article-content {
        font-size: 15px;
    }

    /* 侧边栏卡片 */
    .sidebar-card {
        padding: 20px;
    }

    .sidebar-card h3 {
        font-size: 16px;
    }
}

/* 平板设备适配 */
@media (min-width: 769px) and (max-width: 1024px) {
    .sidebar {
        left: 0;
        width: 220px;
    }

    .main-content {
        margin-left: 220px;
    }
}