/* 变量与基础重置 */
        :root {
            --zpa57-primary: #2c3e50;
            --zpa57-accent: #e67e22;
            --zpa57-light: #f8f9fa;
            --zpa57-dark: #1a252f;
            --zpa57-text: #333333;
            --zpa57-text-muted: #666666;
            --zpa57-border: #dee2e6;
            --zpa57-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --zpa57-radius: 12px;
            --zpa57-container-width: 1100px;
        }

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

        body {
            font-family: "Inter", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.7;
            color: var(--zpa57-text);
            background-color: #ffffff;
            overflow-x: hidden;
            word-break: keep-all;
        }

        h1, h2, h3, h4 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--zpa57-dark);
            white-space: normal;
            word-break: break-word;
        }

        a {
            text-decoration: none;
            transition: all 0.3s ease;
        }

        /* 布局容器 */
        .zpa57-container {
            max-width: var(--zpa57-container-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 导航栏 */
        .zpa57-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--zpa57-border);
            padding: 16px 0;
        }

        .zpa57-nav-wrapper {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }

        .zpa57-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

        .zpa57-logo img {
            height: 40px;
            display: block;
        }

        .zpa57-nav-menu {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            list-style: none;
            min-width: 0;
        }

        .zpa57-nav-menu a {
            color: var(--zpa57-primary);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 0;
            position: relative;
        }

        .zpa57-nav-menu a:hover, .zpa57-nav-menu a.active {
            color: var(--zpa57-accent);
        }

        .zpa57-nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--zpa57-accent);
        }

        /* Hero 区 */
        .zpa57-hero {
            padding: 160px 0 96px;
            background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
            text-align: center;
            border-bottom: 1px solid var(--zpa57-border);
        }

        .zpa57-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            margin-bottom: 24px;
            max-width: 900px;
            margin-left: auto;
            margin-right: auto;
        }

        .zpa57-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--zpa57-text-muted);
            max-width: 800px;
            margin: 0 auto 48px;
            word-break: break-word;
        }

        /* 核心配置步骤 - 独特布局 */
        .zpa57-config-grid {
            padding: 96px 0;
            background: #fff;
        }

        .zpa57-section-label {
            display: inline-block;
            background: rgba(230, 126, 34, 0.1);
            color: var(--zpa57-accent);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .zpa57-step-row {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            margin-bottom: 96px;
            align-items: center;
        }

        .zpa57-step-content {
            flex: 1 1 400px;
            min-width: 0;
        }

        .zpa57-step-visual {
            flex: 1 1 400px;
            min-width: 0;
            background: var(--zpa57-light);
            border-radius: var(--zpa57-radius);
            padding: 40px;
            border: 1px solid var(--zpa57-border);
            box-shadow: var(--zpa57-shadow);
            position: relative;
            overflow: hidden;
        }

        .zpa57-step-visual::before {
            content: "RDP CONFIG";
            position: absolute;
            top: -20px;
            right: -20px;
            font-size: 80px;
            font-weight: 900;
            color: rgba(0,0,0,0.03);
            pointer-events: none;
        }

        .zpa57-step-number {
            font-size: 48px;
            font-weight: 800;
            color: var(--zpa57-accent);
            opacity: 0.2;
            margin-bottom: -20px;
        }

        .zpa57-step-title {
            font-size: 28px;
            margin-bottom: 24px;
        }

        .zpa57-step-list {
            list-style: none;
        }

        .zpa57-step-list li {
            margin-bottom: 16px;
            padding-left: 24px;
            position: relative;
            word-break: break-word;
        }

        .zpa57-step-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--zpa57-accent);
            font-weight: bold;
        }

        /* 协议矩阵区块 */
        .zpa57-matrix-section {
            padding: 96px 0;
            background: var(--zpa57-dark);
            color: #fff;
        }

        .zpa57-matrix-section h2 {
            color: #fff;
            text-align: center;
            margin-bottom: 64px;
        }

        .zpa57-matrix-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

        .zpa57-matrix-card {
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.1);
            padding: 32px;
            border-radius: var(--zpa57-radius);
            transition: transform 0.3s ease;
        }

        .zpa57-matrix-card:hover {
            transform: translateY(-10px);
            background: rgba(255,255,255,0.08);
        }

        .zpa57-matrix-category {
            color: var(--zpa57-accent);
            text-transform: uppercase;
            font-size: 12px;
            letter-spacing: 2px;
            margin-bottom: 16px;
            display: block;
        }

        .zpa57-matrix-protocols {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 16px;
            display: block;
        }

        .zpa57-matrix-detail {
            font-size: 14px;
            color: #bdc3c7;
            word-break: break-word;
        }

        /* 动态内容区块 */
        .zpa57-dynamic-section {
            padding: 96px 0;
            background: #fdfdfd;
        }

        .zpa57-article-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .zpa57-article-card {
            background: #fff;
            border: 1px solid var(--zpa57-border);
            padding: 24px;
            border-radius: var(--zpa57-radius);
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
        }

        /* 页脚 */
        .zpa57-footer {
            background: var(--zpa57-light);
            padding: 64px 0 32px;
            border-top: 1px solid var(--zpa57-border);
        }

        .zpa57-footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            margin-bottom: 48px;
        }

        .zpa57-footer-brand {
            flex: 1 1 300px;
            min-width: 0;
        }

        .zpa57-footer-brand-name {
            font-size: 24px;
            font-weight: 800;
            color: var(--zpa57-primary);
            margin-bottom: 16px;
        }

        .zpa57-footer-links {
            flex: 2 1 400px;
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            min-width: 0;
        }

        .zpa57-footer-column {
            flex: 1 1 150px;
            min-width: 0;
        }

        .zpa57-footer-column h4 {
            font-size: 16px;
            margin-bottom: 20px;
        }

        .zpa57-footer-column ul {
            list-style: none;
        }

        .zpa57-footer-column li {
            margin-bottom: 10px;
        }

        .zpa57-footer-column a {
            color: var(--zpa57-text-muted);
            font-size: 14px;
        }

        .zpa57-footer-column a:hover {
            color: var(--zpa57-accent);
        }

        .zpa57-copyright {
            text-align: center;
            padding-top: 32px;
            border-top: 1px solid var(--zpa57-border);
            color: var(--zpa57-text-muted);
            font-size: 13px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .zpa57-nav-menu {
                display: none; /* 简化移动端，实际项目中需汉堡菜单 */
            }
            .zpa57-step-row {
                flex-direction: column;
            }
            .zpa57-hero {
                padding: 120px 0 64px;
            }
        }

        /* 交互动效 */
        .zpa57-btn {
            display: inline-block;
            padding: 14px 32px;
            background: var(--zpa57-accent);
            color: #fff;
            border-radius: 30px;
            font-weight: 600;
            box-shadow: 0 4px 15px rgba(230, 126, 34, 0.3);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .zpa57-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(230, 126, 34, 0.4);
            color: #fff;
        }