body {
            background-color: #f5f7fa;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* ===== 页面主体容器 ===== */
        .page-wrapper {
            flex: 1;
            max-width: 1200px;
            margin: 0 auto;
            padding: 32px 24px 60px;
            width: 100%;
        }

        /* ===== 左右网格布局 ===== */
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 280px;
            gap: 32px;
            align-items: start;
        }

        /* ===== 左侧：文章主内容 ===== */
        .main-content {
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.04);
            padding: 44px 48px 48px;
            min-width: 0;
        }

        /* ===== 右侧：侧边栏容器 ===== */
        .sidebar {
            position: sticky;
            top: 100px;
            display: flex;
            flex-direction: column;
            gap: 24px;
            background: transparent;
            box-shadow: none;
            border: none;
            padding: 0;
        }

        /* ===== 侧边栏卡片通用 ===== */
        .sidebar-card {
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.04);
            padding: 24px 20px 28px;
            border: 1px solid var(--border-light);
        }

        /* ===== 侧边栏标题 ===== */
        .sidebar-title {
            font-size: 16px;
            font-weight: 700;
            color: #0b1a2b;
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.2px;
        }

        .sidebar-title .badge {
            background: var(--primary);
            color: #fff;
            font-size: 12px;
            padding: 0 10px;
            border-radius: 20px;
            line-height: 20px;
            margin-left: auto;
        }

        /* ===== 分类导航（一级分类，卡片样式） ===== */
        .sidebar-nav ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .sidebar-nav li a {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 16px;
            border-radius: 10px;
            background: #f8fafc;
            color: #1e2a3a;
            font-weight: 500;
            font-size: 15px;
            transition: all 0.2s ease;
            text-decoration: none;
            border: 1px solid transparent;
        }

        .sidebar-nav li a .cat-icon {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-nav li a .cat-icon::before {
            content: "▸";
            color: #b0c4d9;
            font-size: 14px;
            transition: color 0.2s;
        }

        .sidebar-nav li a:hover {
            background: var(--primary-soft);
            border-color: var(--primary);
            color: var(--primary-dark);
            transform: translateX(2px);
        }

        .sidebar-nav li a:hover .cat-icon::before {
            color: var(--primary);
        }

        .sidebar-nav li a.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(101, 181, 48, 0.25);
            transform: translateX(2px);
        }

        .sidebar-nav li a.active .cat-icon::before {
            color: #fff;
        }

        .sidebar-nav .count {
            background: #eef2f6;
            padding: 0 10px;
            border-radius: 20px;
            font-size: 12px;
            color: #5e6f7e;
            font-weight: 600;
            line-height: 20px;
            transition: 0.2s;
        }

        .sidebar-nav li a:hover .count {
            background: #d4e4ca;
            color: var(--primary-dark);
        }

        .sidebar-nav li a.active .count {
            background: rgba(255, 255, 255, 0.2);
            color: #fff;
        }

        /* ===== 作者名片 ===== */
        .author-card-sidebar {
            text-align: center;
        }

        .author-card-sidebar .author-avatar {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            font-weight: 700;
            margin: 0 auto 12px;
        }

        .author-card-sidebar .author-name {
            font-size: 18px;
            font-weight: 700;
            color: #0b1a2b;
        }

        .author-card-sidebar .author-bio {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 2px;
        }

        .author-card-sidebar .author-desc {
            font-size: 13px;
            color: #7a8b9c;
            margin-bottom: 18px;
            line-height: 1.6;
        }

        .author-card-sidebar .author-social {
            display: flex;
            justify-content: center;
            gap: 8px;
        }

        .author-card-sidebar .author-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary-soft);
            color: var(--primary-dark);
            text-decoration: none;
            transition: all 0.2s ease;
            font-size: 15px;
        }

        .author-card-sidebar .author-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px 12px;
            font-size: 14px;
            color: #7a8b9c;
            margin-bottom: 24px;
            padding-bottom: 18px;
            border-bottom: 1px solid var(--border-light);
        }

        .breadcrumb a {
            color: #5e6f7e;
            text-decoration: none;
            transition: color 0.2s;
        }

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

        .breadcrumb .sep {
            color: #d0d7de;
        }

        .breadcrumb .current {
            color: #0b1a2b;
            font-weight: 500;
        }

        .breadcrumb .category-highlight {
            background: var(--primary-soft);
            color: var(--primary-dark);
            padding: 2px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            border: 1px solid rgba(101, 181, 48, 0.15);
        }

        /* ===== 文章头部 ===== */
        .article-header {
            margin-bottom: 28px;
        }

        .article-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 14px;
        }

        .article-category-badge .cat {
            background: var(--primary-soft);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 30px;
            border: 1px solid rgba(101, 181, 48, 0.18);
        }

        .article-category-badge .sub-cat {
            background: #f0f2f5;
            color: #3d4e5e;
            font-size: 13px;
            padding: 4px 16px;
            border-radius: 30px;
        }

        .article-title {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            color: #0b1a2b;
            margin-bottom: 18px;
            letter-spacing: -0.3px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 18px 28px;
            font-size: 15px;
            color: #5e6f7e;
        }

        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .article-meta .avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 15px;
            flex-shrink: 0;
        }

        .article-meta .author-name {
            font-weight: 600;
            color: #1e2a3a;
        }

        .meta-divider {
            color: #d0d7de;
        }

        .meta-date,
        .meta-read {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .meta-date svg,
        .meta-read svg {
            width: 18px;
            height: 18px;
            fill: none;
            stroke: currentColor;
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        /* ===== 特色图 ===== */
        .article-featured-image {
            margin-bottom: 34px;
            border-radius: 16px;
            overflow: hidden;
            background: #eef2f6;
            aspect-ratio: 16 / 9;
            display: flex;
            align-items: center;
            justify-content: center;
            background-image: linear-gradient(135deg, #e8f0e2 0%, #d4e4ca 100%);
            color: #2d4a1a;
            font-weight: 500;
        }

        .article-featured-image span {
            background: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(4px);
            padding: 10px 28px;
            border-radius: 40px;
            border: 1px solid rgba(255, 255, 255, 0.5);
            font-size: 15px;
        }

        /* ===== 正文 ===== */
        .article-body {
            font-size: 17px;
            color: #1e2a3a;
        }

        .article-body p {
            margin-bottom: 24px;
        }

        .article-body strong {
            color: #0b1a2b;
            font-weight: 600;
        }

        .article-body .highlight-block {
            background: var(--primary-soft);
            border-left: 5px solid var(--primary);
            padding: 20px 26px;
            border-radius: 0 12px 12px 0;
            margin: 32px 0;
        }

        .article-body .highlight-block p {
            margin-bottom: 0;
        }

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            margin: 40px 0 16px;
            color: #0b1a2b;
            letter-spacing: -0.2px;
        }

        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            margin: 32px 0 14px;
            color: #0b1a2b;
        }

        .article-body ul,
        .article-body ol {
            margin: 0 0 24px 24px;
            padding-left: 8px;
        }

        .article-body li {
            margin-bottom: 8px;
        }

        /* ===== 标签 ===== */
        .article-tags {
            margin-top: 44px;
            padding-top: 28px;
            border-top: 1px solid var(--border-light);
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .article-tags .tag {
            background: #f0f2f5;
            color: #3d4e5e;
            font-size: 14px;
            padding: 4px 18px;
            border-radius: 30px;
            transition: background 0.2s ease, color 0.2s ease;
            text-decoration: none;
            font-weight: 500;
        }

        .article-tags .tag:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ===== 作者信息卡（文章内） ===== */
        .author-card {
            display: flex;
            align-items: center;
            gap: 20px;
            background: #f8fafc;
            border-radius: 16px;
            padding: 22px 28px;
            margin-top: 40px;
            border: 1px solid var(--border-light);
            flex-wrap: wrap;
        }

        .author-card .avatar-lg {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 24px;
            flex-shrink: 0;
        }

        .author-card .author-info {
            flex: 1;
            min-width: 160px;
        }

        .author-card .author-info .name {
            font-weight: 700;
            font-size: 18px;
            color: #0b1a2b;
        }

        .author-card .author-info .bio {
            font-size: 15px;
            color: #5e6f7e;
            margin-top: 2px;
        }

        .author-card .author-info .bio a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
        }

        .author-card .author-info .bio a:hover {
            text-decoration: underline;
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--border-light);
        }

        .related-section .related-title {
            font-size: 20px;
            font-weight: 700;
            color: #0b1a2b;
            margin-bottom: 20px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .related-grid .related-item {
            background: #f8fafc;
            border-radius: 14px;
            padding: 18px 20px 20px;
            transition: background 0.2s ease, transform 0.2s ease;
            border: 1px solid transparent;
            text-decoration: none;
            color: inherit;
            display: block;
        }

        .related-grid .related-item:hover {
            background: #ffffff;
            border-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(101, 181, 48, 0.08);
        }

        .related-grid .related-item .related-item-img {
            width: 100%;
            height: 120px;
            border-radius: 10px;
            overflow: hidden;
            margin-bottom: 12px;
            background: #eef2f6;
        }

        .related-grid .related-item .related-item-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .related-grid .related-item .related-item-img .img-placeholder {
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 36px;
            font-weight: 700;
        }

        .related-grid .related-item .related-item-info {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .related-grid .related-item .related-item-title {
            font-weight: 600;
            font-size: 15px;
            color: #0b1a2b;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.5;
        }

        .related-grid .related-item .related-item-meta {
            font-size: 13px;
            color: #7a8b9c;
            margin-top: 10px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .related-grid .related-item .related-item-meta .dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: #d0d7de;
        }

       
        /* ===== 响应式 ===== */
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr 240px;
                gap: 24px;
            }

            .main-content {
                padding: 32px 28px 36px;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
         
            .page-wrapper {
                padding: 16px 12px 40px;
            }

            .content-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .main-content {
                padding: 24px 18px 32px;
                border-radius: 16px;
            }

            .sidebar {
                position: static;
                order: 2;
                gap: 20px;
            }

            .sidebar-card {
                padding: 20px 16px 24px;
            }

            .article-title {
                font-size: 26px;
            }

            .article-meta {
                gap: 12px 20px;
                font-size: 14px;
            }

            .article-featured-image {
                aspect-ratio: 16 / 10;
            }

            .article-body {
                font-size: 16px;
            }

            .article-body h2 {
                font-size: 22px;
            }

            .article-body h3 {
                font-size: 18px;
            }

            .author-card {
                padding: 18px 20px;
                gap: 16px;
            }

            .author-card .avatar-lg {
                width: 48px;
                height: 48px;
                font-size: 20px;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

        }

        @media (max-width: 480px) {
            .main-content {
                padding: 18px 14px 24px;
            }

            .article-title {
                font-size: 22px;
            }

            .article-meta {
                font-size: 13px;
                gap: 8px 14px;
            }

            .breadcrumb {
                font-size: 13px;
            }

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

            .article-body h2 {
                font-size: 20px;
            }

            .article-body h3 {
                font-size: 17px;
            }

            .article-tags .tag {
                font-size: 13px;
                padding: 3px 14px;
            }

            .author-card-sidebar .author-avatar {
                width: 64px;
                height: 64px;
                font-size: 26px;
            }
        }