:root {
            --bg-color: #ffffff;
            --text-color: #2b303b;
            --heading-color: #111827;
            --accent-color: #7c3aed; /* Deep Purple */
            --border-color: #e5e7eb;
            --card-bg: #f3f4f6; /* Soft Neutral Gray */
            --table-header-bg: #f3f4f6;
            --table-hover: #f8fafc;
            --shadow-subtle: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
        }

        [data-theme="dark"] {
            --bg-color: #0f172a;
            --text-color: #cbd5e1;
            --heading-color: #f8fafc;
            --accent-color: #a78bfa; /* Lighter Purple for Dark Mode */
            --border-color: #334155;
            --card-bg: #1e293b;
            --table-header-bg: #1e293b;
            --table-hover: #1e293b;
            --shadow-subtle: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background-color: var(--bg-color);
            color: var(--text-color);
            line-height: 1.7;
            transition: background-color 0.3s ease, color 0.3s ease;
        }

        .blog-container {
            max-width: 900px;
            margin: 0 auto;
            padding: 24px 24px 60px 24px;
        }
/* 左右双栏布局容器 */
        .blog-layout-wrapper {
            display: flex;
            gap: 40px;
            position: relative;
            align-items: flex-start;
        }

        /* 左侧文章正文区 */
        .blog-main-content {
            flex: 1;
            min-width: 0;
            max-width: 900px;
        }

        /* Top Controls Bar */
        .preview-controls {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 24px;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border-color);
        }

        .brand-tag {
            font-size: 0.85rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--accent-color);
        }

        .control-btns {
            display: flex;
            gap: 12px;
        }

        .btn {
            background: var(--card-bg);
            color: var(--heading-color);
            border: 1px solid var(--border-color);
            padding: 8px 16px;
            border-radius: 6px;
            cursor: pointer;
            font-size: 0.85rem;
            font-weight: 500;
            transition: all 0.2s ease;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .btn:hover {
            border-color: var(--accent-color);
            background: var(--table-header-bg);
        }

        /* Typography & Headings */
        h1 {
            font-size: 2.3rem;
            color: var(--heading-color);
            font-weight: 800;
            line-height: 1.25;
            margin-top: 0;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
        }

        h2 {
            font-size: 1.5rem;
            color: var(--heading-color);
            font-weight: 700;
            margin-top: 45px;
            margin-bottom: 16px;
            scroll-margin-top: 30px;
        }

        h3 {
            font-size: 1.2rem;
            color: var(--heading-color);
            font-weight: 600;
            margin-top: 25px;
            margin-bottom: 12px;
        }

        p, ul, ol {
            margin-bottom: 20px;
            font-size: 1.05rem;
        }

        ul, ol {
            padding-left: 24px;
        }

        li {
            margin-bottom: 8px;
        }

        strong {
            color: var(--heading-color);
        }

        a {
            color: var(--accent-color);
            text-decoration: none;
        }

        a:hover {
            text-decoration: underline;
        }

      /* Quick Summary Box - 协调的深浅灰色边框与圆点 */
        .quick-summary {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            border-left: 4px solid #6b7280;
            padding: 24px 30px;
            border-radius: 8px;
            margin-bottom: 30px;
            box-shadow: var(--shadow-subtle);
        }

        .quick-summary h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--heading-color);
            font-size: 1.15rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .quick-summary p {
            margin-bottom: 16px;
            font-size: 1rem;
        }

        .quick-summary ul {
            margin-bottom: 16px;
            list-style-type: none;
            padding-left: 0;
        }

        .quick-summary li {
            position: relative;
            padding-left: 20px;
            margin-bottom: 10px;
            font-size: 0.98rem;
        }

        .quick-summary li::before {
            content: "•";
            color: #6b7280;
            font-weight: bold;
            position: absolute;
            left: 0;
            font-size: 1.2rem;
            line-height: 1;
        }

        .contact-box {
            font-weight: 500;
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid var(--border-color);
        }
        /* Table of Contents - Clean Boxless Style */
        .toc-boxless {
            margin: 35px 0 45px 0;
            padding: 0;
        }

        .toc-boxless h3 {
            margin-top: 0;
            font-size: 1.25rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--heading-color);
            margin-bottom: 4px;
        }

        .toc-hint {
            font-size: 0.88rem;
            color: #6b7280;
            margin-bottom: 16px;
            font-style: italic;
        }

        .toc-boxless ol {
            margin-bottom: 0;
            padding-left: 20px;
        }

        .toc-boxless li {
            margin-bottom: 10px;
            font-size: 1rem;
            color: var(--heading-color);
        }

        .toc-boxless a {
            color: var(--heading-color);
            font-weight: 500;
            text-decoration: none;
            transition: color 0.2s ease;
        }

      /* 鼠标悬停改为协调的深灰色，不再发紫 */
        .toc-boxless a:hover {
            color: #111827; /* 悬停时显示沉稳的深灰色 */
            text-decoration: underline;
        }

        /* Boxless Clean Vertical Section 1 */
        .tech-section-boxless {
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border-color);
        }

        .tech-section-boxless:last-child {
            border-bottom: none;
            margin-bottom: 0;
        }

        .tech-section-boxless h4 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--heading-color);
            margin-bottom: 14px;
        }

        .tech-section-boxless ul {
            list-style-type: none;
            padding-left: 0;
            margin-bottom: 0;
        }

        .tech-section-boxless li {
            margin-bottom: 12px;
            font-size: 1.02rem;
        }

        /* Tables */
        .table-container {
            overflow-x: auto;
            margin: 30px 0;
            border: 1px solid var(--border-color);
            border-radius: 8px;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 0.95rem;
        }

        th {
            background-color: var(--table-header-bg);
            color: var(--heading-color);
            font-weight: 600;
            padding: 14px 16px;
            border-bottom: 1px solid var(--border-color);
        }

        td {
            padding: 14px 16px;
            border-bottom: 1px solid var(--border-color);
            vertical-align: top;
        }

        tr:last-child td {
            border-bottom: none;
        }

        tr:hover td {
            background-color: var(--table-hover);
        }

        /* Sample Comparison Box */
        .sample-box {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            margin: 25px 0;
        }

        .sample-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 12px;
        }

        @media (max-width: 600px) {
            .sample-grid { grid-template-columns: 1fr; }
        }

        /* CTA Box */
        .cta-box {
            background-color: var(--card-bg);
            border: 2px solid var(--accent-color);
            border-radius: 8px;
            padding: 30px;
            margin-top: 50px;
            text-align: center;
        }

        .cta-box h3 {
            color: var(--accent-color);
            margin-top: 0;
        }

        /* Modal for Code Copy */
        .modal {
            display: none;
            position: fixed;
            top: 0; left: 0; width: 100%; height: 100%;
            background: rgba(0,0,0,0.6);
            z-index: 1000;
            justify-content: center;
            align-items: center;
        }

        .modal-content {
            background: var(--bg-color);
            width: 90%;
            max-width: 700px;
            border-radius: 8px;
            padding: 24px;
            border: 1px solid var(--border-color);
            max-height: 80vh;
            display: flex;
            flex-direction: column;
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 16px;
        }

        .modal-header h3 { margin: 0; }

        .close-btn {
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-color);
        }

        textarea {
            width: 100%;
            height: 300px;
            background: var(--card-bg);
            color: var(--text-color);
            border: 1px solid var(--border-color);
            border-radius: 4px;
            padding: 12px;
            font-family: monospace;
            font-size: 0.85rem;
            resize: vertical;
        }