/* 全局重置与基础样式 */
        :root {
            --primary: #4361ee;
            --primary-light: #5874f5;
            --primary-dark: #3a56d4;
            --bg-light: #f9fafb;
            --bg-white: #ffffff;
            --text-dark: #1e293b;
            --text-gray: #64748b;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
            --radius: 16px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }

        body {
            background-color: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.8;
            padding: 0;
            scroll-behavior: smooth;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* 容器样式 - 让内容区自动撑开 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 40px 24px;
            flex: 1;
            width: 100%;
        }

        /* ----- 头部样式 ----- */
        .site-header {
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            height: 70px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo a {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            letter-spacing: -0.02em;
            transition: var(--transition);
        }

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

        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 32px;
        }

        .main-nav a {
            color: var(--text-gray);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }

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

        /* ----- 底部样式 ----- */
        .site-footer {
            background: var(--bg-white);
            border-top: 1px solid var(--border);
            padding: 24px 0;
            margin-top: 40px;
        }

        .footer-container {
            max-width: 860px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            color: var(--text-gray);
            font-size: 0.9rem;
        }

        .footer-container .copyright {
            color: var(--text-light);
        }

        .footer-container .icp a {
            color: var(--text-gray);
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-container .icp a:hover {
            color: var(--primary);
        }

        /* 返回按钮 */
        .back-button {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            background: var(--bg-white);
            color: var(--primary);
            text-decoration: none;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            border: 1px solid var(--border);
            transition: var(--transition);
            margin-bottom: 32px;
        }

        .back-button svg {
            width: 16px;
            height: 16px;
            fill: var(--primary);
            transition: var(--transition);
        }

        .back-button:hover {
            background: var(--primary);
            color: white;
            transform: translateX(-4px);
            box-shadow: 0 4px 12px rgba(67, 97, 238, 0.2);
        }

        .back-button:hover svg {
            fill: white;
            transform: translateX(-2px);
        }

        /* 文章头部 */
        .article-header {
            margin-bottom: 48px;
            text-align: center;
            padding-bottom: 32px;
            border-bottom: 1px solid var(--border);
        }

        /* 文章标题 */
        .article-title {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 20px;
            line-height: 1.3;
            letter-spacing: -0.02em;
        }

        /* 发布信息 */
        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            color: var(--text-light);
            font-size: 0.95rem;
        }

        .article-date {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-date svg {
            width: 18px;
            height: 18px;
            fill: var(--text-light);
        }

        /* 文章正文 */
        .article-content {
            font-size: 1.05rem;
            color: var(--text-gray);
            line-height: 1.85;
        }

        /* 正文段落 */
        .article-content p {
            margin-bottom: 28px;
            text-align: justify;
        }

        /* 正文标题 */
        .article-content h2 {
            font-size: clamp(1.4rem, 3vw, 1.8rem);
            color: var(--text-dark);
            font-weight: 700;
            margin: 48px 0 24px;
            line-height: 1.4;
            position: relative;
            padding-left: 16px;
        }

        .article-content h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background: var(--primary);
            border-radius: 2px;
        }

        .article-content h3 {
            font-size: clamp(1.2rem, 2vw, 1.4rem);
            color: var(--text-dark);
            font-weight: 600;
            margin: 36px 0 20px;
            line-height: 1.4;
        }

        /* 代码块 */
        .article-content pre {
            background: #1e293b;
            color: #e2e8f0;
            padding: 24px;
            border-radius: 12px;
            overflow-x: auto;
            margin: 24px 0;
            font-size: 0.95rem;
            line-height: 1.6;
            font-family: "SF Mono", Monaco, Consolas, monospace;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
        }

        /* 列表样式 */
        .article-content ul {
            margin: 16px 0 32px 24px;
        }

        .article-content li {
            margin-bottom: 12px;
            color: var(--text-gray);
        }

        /* 引用块 */
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            padding: 20px 24px;
            background: rgba(67, 97, 238, 0.05);
            margin: 28px 0;
            border-radius: 0 8px 8px 0;
            color: var(--text-dark);
            font-style: italic;
        }

        /* 文章导航 */
        .article-navigation {
            display: flex;
            justify-content: space-between;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
        }
        .nav-prev, .nav-next {
            display: inline-flex;
            align-items: center;
            padding: 10px 20px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: 8px;
            color: var(--text-gray);
            font-weight: 500;
            text-decoration: none;
            transition: var(--transition);
            max-width: 45%;
        }
        .nav-prev:hover, .nav-next:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: white;
        }
        .nav-prev.disabled, .nav-next.disabled {
            opacity: 0.5;
            cursor: not-allowed;
            pointer-events: none;
        }
        .nav-prev::before {
            content: "←";
            margin-right: 8px;
        }
        .nav-next::after {
            content: "→";
            margin-left: 8px;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .header-container {
                padding: 0 16px;
            }
            .main-nav ul {
                gap: 20px;
            }
            .container {
                padding: 32px 16px;
            }
            .article-header {
                margin-bottom: 32px;
                padding-bottom: 24px;
            }
            .article-content {
                font-size: 1rem;
            }
            .article-content h2 {
                margin: 36px 0 20px;
                padding-left: 12px;
            }
            .article-content pre {
                padding: 20px;
                font-size: 0.9rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 8px;
            }
            .footer-container {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
            .article-navigation {
                flex-direction: column;
                gap: 12px;
            }
            .nav-prev, .nav-next {
                max-width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            .header-container {
                height: 60px;
            }
            .logo a {
                font-size: 1.2rem;
            }
            .main-nav ul {
                gap: 12px;
            }
            .back-button {
                width: 100%;
                justify-content: center;
            }
            .article-content ul {
                margin-left: 16px;
            }
            .article-content blockquote {
                padding: 16px 20px;
            }
        }