/* ===== 全局变量（继承自下载页风格） ===== */
        :root {
            --primary-orange: #FF6C37;
            --primary-dark: #E55A2B;
            --primary-light: #FF8A5C;
            --bg-light: #f8f9fc;
            --bg-card: #ffffff;
            --text-dark: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8888aa;
            --border-color: #e8ecf4;
            --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 40px rgba(255, 108, 55, 0.15);
            --radius: 16px;
            --transition: 0.3s ease;
            --max-width: 1200px;
        }

        /* ===== 重置 & 基础 ===== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.7;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        img {
            max-width: 100%;
            display: block;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== HEADER（与下载页一致） ===== */
        .header {
            background: var(--bg-card);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 2px solid var(--primary-orange);
        }

        .nav-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
        }

        .logo-icon {
            color: var(--primary-orange);
            font-size: 1.7rem;
        }

        .logo-text span {
            color: var(--primary-orange);
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 28px;
            align-items: center;
        }

        .nav-menu a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: color var(--transition);
            position: relative;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--primary-orange);
        }

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            right: 0;
            height: 2.5px;
            background: var(--primary-orange);
            border-radius: 4px;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-dark);
            cursor: pointer;
            padding: 4px 8px;
        }

        /* ===== 文章主容器（卡片风格） ===== */
        .article-wrapper {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 40px 48px 60px;
            margin: 32px auto;
            border: 1px solid var(--border-color);
        }

        /* ===== 文章头部 ===== */
        .article-header {
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 24px;
            margin-bottom: 32px;
        }

        .article-header .breadcrumb {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 12px;
        }

        .article-header .breadcrumb a {
            color: var(--primary-orange);
        }

        .article-header .breadcrumb a:hover {
            text-decoration: underline;
        }

        .article-header h1 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.02em;
            line-height: 1.3;
            margin-bottom: 8px;
        }

        .article-header .meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 24px;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 6px;
        }

        .article-header .meta .tag {
            background: var(--bg-light);
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--text-secondary);
        }

        .article-header .meta i {
            margin-right: 4px;
            color: var(--text-muted);
        }

        /* ===== 文章正文 ===== */
        .article-body h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-top: 48px;
            margin-bottom: 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--border-color);
        }

        .article-body h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-top: 32px;
            margin-bottom: 12px;
        }

        .article-body h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-top: 24px;
            margin-bottom: 8px;
        }

        .article-body p {
            color: var(--text-secondary);
            margin-bottom: 16px;
        }

        .article-body a {
            color: var(--primary-orange);
            text-decoration: none;
        }

        .article-body a:hover {
            text-decoration: underline;
        }

        .article-body ul,
        .article-body ol {
            margin: 12px 0 20px 24px;
            color: var(--text-secondary);
        }

        .article-body li {
            margin-bottom: 6px;
        }

        /* ===== 图片占位 / 提示框 ===== */
        .figure-placeholder {
            background: var(--bg-light);
            border: 1px dashed var(--border-color);
            border-radius: var(--radius);
            padding: 32px 20px;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.95rem;
            margin: 20px 0 24px;
            transition: background 0.2s;
        }

        .figure-placeholder i {
            font-size: 1.8rem;
            color: var(--primary-orange);
            display: block;
            margin-bottom: 8px;
        }

        .figure-placeholder strong {
            color: var(--text-dark);
        }

        /* ===== 代码块（与下载页风格统一） ===== */
        .code-block {
            background: #1e2a3a;
            color: #e3e9f2;
            border-radius: 10px;
            padding: 18px 22px;
            font-family: 'JetBrains Mono', 'Fira Code', monospace;
            font-size: 0.9rem;
            overflow-x: auto;
            margin: 16px 0 24px;
            white-space: pre-wrap;
            word-break: break-word;
            border-left: 4px solid var(--primary-orange);
        }

        .code-block .comment {
            color: #8a9aa8;
        }
        .code-block .keyword {
            color: #c792ea;
        }
        .code-block .string {
            color: #c3e88d;
        }
        .code-block .function {
            color: #82aaff;
        }

        /* ===== 提示/备注框 ===== */
        .note-box {
            background: #f8faff;
            border-left: 4px solid var(--primary-orange);
            padding: 16px 20px;
            border-radius: 6px;
            margin: 20px 0 24px;
            color: var(--text-secondary);
        }

        .note-box i {
            color: var(--primary-orange);
            margin-right: 8px;
        }

        .note-box strong {
            color: var(--text-dark);
        }

        /* ===== 步骤表格 ===== */
        .step-table {
            width: 100%;
            border-collapse: collapse;
            margin: 16px 0 24px;
            font-size: 0.95rem;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .step-table th {
            background: var(--bg-light);
            text-align: left;
            padding: 10px 16px;
            border: 1px solid var(--border-color);
            font-weight: 600;
            color: var(--text-dark);
        }

        .step-table td {
            padding: 10px 16px;
            border: 1px solid var(--border-color);
            vertical-align: top;
            color: var(--text-secondary);
        }

        .step-table tr:nth-child(even) td {
            background: #fafcfe;
        }

        /* ===== 文章底部 ===== */
        .article-footer {
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .article-footer .share-links i {
            font-size: 1.2rem;
            margin-right: 12px;
            color: var(--text-muted);
            transition: color 0.2s;
            cursor: default;
        }

        .article-footer .share-links i:hover {
            color: var(--primary-orange);
        }

        /* ===== FOOTER（与下载页一致） ===== */
        .footer {
            background: var(--text-dark);
            color: #ccc;
            padding: 40px 24px 20px;
            margin-top: 40px;
        }

        .footer-content {
            max-width: var(--max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 32px;
        }

        .footer-column h3 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 12px;
        }

        .footer-column ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .footer-column ul a {
            color: #aaa;
            font-size: 0.9rem;
            transition: color var(--transition);
        }

        .footer-column ul a:hover {
            color: var(--primary-orange);
        }

        .footer-column p {
            font-size: 0.9rem;
            color: #aaa;
        }

        .copyright {
            max-width: var(--max-width);
            margin: 28px auto 0;
            padding-top: 20px;
            border-top: 1px solid #333;
            text-align: center;
            font-size: 0.85rem;
            color: #888;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }

            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--bg-card);
                padding: 20px 24px;
                gap: 16px;
                box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
                border-bottom: 2px solid var(--border-color);
            }

            .nav-menu.show {
                display: flex !important;
            }

            .article-wrapper {
                padding: 24px 20px 40px;
                margin: 16px 0;
            }

            .article-header h1 {
                font-size: 1.7rem;
            }

            .article-body h2 {
                font-size: 1.4rem;
            }

            .article-body h3 {
                font-size: 1.15rem;
            }

            .code-block {
                font-size: 0.8rem;
                padding: 14px 16px;
            }

            .step-table {
                font-size: 0.85rem;
            }

            .step-table th,
            .step-table td {
                padding: 8px 12px;
            }

            .footer-content {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 480px) {
            .article-wrapper {
                padding: 16px 12px 32px;
            }

            .article-header h1 {
                font-size: 1.4rem;
            }

            .article-header .meta {
                font-size: 0.8rem;
                gap: 8px 16px;
            }

            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
            }
        }