:root {
            --zpa57-primary: #1a56db;
            --zpa57-secondary: #0ea5e9;
            --zpa57-accent: #f59e0b;
            --zpa57-dark: #111827;
            --zpa57-gray-100: #f3f4f6;
            --zpa57-gray-200: #e5e7eb;
            --zpa57-gray-600: #4b5563;
            --zpa57-gray-700: #374151;
            --zpa57-white: #ffffff;
            --zpa57-spacing-unit: 8px;
            --zpa57-container-width: 1100px;
        }

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

        body {
            font-family: "Inter", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.7;
            color: var(--zpa57-gray-700);
            background-color: #fcfcfd;
            overflow-x: hidden;
            word-break: keep-all;
        }

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

        p, div, span {
            word-break: break-word;
            overflow-wrap: break-word;
        }

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

        /* Navigation */
        .zpa57-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--zpa57-gray-200);
            padding: calc(var(--zpa57-spacing-unit) * 2) 0;
        }

        .zpa57-nav-container {
            max-width: var(--zpa57-container-width);
            margin: 0 auto;
            padding: 0 24px;
            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-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 16px;
            min-width: 0;
        }

        .zpa57-menu li {
            min-width: 0;
        }

        .zpa57-menu a {
            font-size: 14px;
            font-weight: 500;
            color: var(--zpa57-gray-600);
            padding: 8px 4px;
            border-bottom: 2px solid transparent;
        }

        .zpa57-menu a:hover {
            color: var(--zpa57-primary);
        }

        .zpa57-menu a.zpa57-active {
            color: var(--zpa57-primary);
            border-bottom-color: var(--zpa57-primary);
        }

        /* Hero Section */
        .zpa57-hero {
            padding: 96px 24px;
            background: radial-gradient(circle at top right, #e0eaff 0%, #fcfcfd 50%);
            text-align: center;
        }

        .zpa57-hero-inner {
            max-width: 800px;
            margin: 0 auto;
        }

        .zpa57-hero h1 {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            font-weight: 800;
            margin-bottom: 24px;
            background: linear-gradient(135deg, var(--zpa57-dark) 0%, var(--zpa57-primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .zpa57-hero p {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--zpa57-gray-600);
            margin-bottom: 40px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Protocol Grid */
        .zpa57-section {
            padding: 64px 24px;
            max-width: var(--zpa57-container-width);
            margin: 0 auto;
        }

        .zpa57-section-title {
            text-align: center;
            margin-bottom: 48px;
        }

        .zpa57-section-title h2 {
            font-size: clamp(1.5rem, 3vw + 0.5rem, 2.25rem);
            margin-bottom: 16px;
        }

        .zpa57-grid-matrix {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            margin-top: 32px;
        }

        .zpa57-matrix-card {
            background: var(--zpa57-white);
            border-radius: 20px;
            padding: 32px;
            border: 1px solid var(--zpa57-gray-200);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .zpa57-matrix-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.05);
        }

        .zpa57-card-category {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--zpa57-primary);
            font-weight: 700;
            margin-bottom: 12px;
        }

        .zpa57-card-protocols {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin: 16px 0;
        }

        .zpa57-protocol-tag {
            background: var(--zpa57-gray-100);
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 13px;
            font-weight: 600;
        }

        .zpa57-card-details {
            font-size: 14px;
            color: var(--zpa57-gray-600);
            border-top: 1px dashed var(--zpa57-gray-200);
            padding-top: 16px;
            margin-top: auto;
        }

        /* Tutorial Content Area */
        .zpa57-tutorial-layout {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            align-items: flex-start;
        }

        .zpa57-content-main {
            flex: 1 1 600px;
            min-width: 0;
        }

        .zpa57-step-box {
            background: var(--zpa57-white);
            border-left: 4px solid var(--zpa57-primary);
            padding: 32px;
            margin-bottom: 32px;
            border-radius: 0 16px 16px 0;
            box-shadow: 4px 4px 0px var(--zpa57-gray-100);
        }

        .zpa57-step-number {
            font-size: 48px;
            font-weight: 900;
            color: rgba(26, 86, 219, 0.1);
            line-height: 1;
            margin-bottom: -20px;
        }

        .zpa57-sidebar {
            flex: 0 0 300px;
            min-width: 0;
            position: sticky;
            top: 100px;
        }

        .zpa57-widget {
            background: var(--zpa57-dark);
            color: var(--zpa57-white);
            padding: 32px;
            border-radius: 24px;
            margin-bottom: 24px;
        }

        /* Buttons */
        .zpa57-btn {
            display: inline-block;
            padding: 16px 32px;
            border-radius: 12px;
            font-weight: 600;
            cursor: pointer;
            text-align: center;
        }

        .zpa57-btn-primary {
            background: linear-gradient(135deg, var(--zpa57-primary), var(--zpa57-secondary));
            color: white;
            box-shadow: 0 10px 20px rgba(26, 86, 219, 0.2);
        }

        .zpa57-btn-primary:hover {
            transform: scale(1.02);
            box-shadow: 0 15px 30px rgba(26, 86, 219, 0.3);
        }

        /* Dynamic Content Marker */
        .zpa57-dynamic-section {
            background: #fff;
            padding: 80px 24px;
            border-top: 1px solid var(--zpa57-gray-100);
        }

        /* Footer */
        .zpa57-footer {
            background: var(--zpa57-dark);
            color: var(--zpa57-white);
            padding: 64px 24px 32px;
            margin-top: 64px;
        }

        .zpa57-footer-grid {
            max-width: var(--zpa57-container-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }

        .zpa57-footer-brand h3 {
            color: white;
            font-size: 24px;
            margin-bottom: 16px;
        }

        .zpa57-footer-links h4 {
            color: var(--zpa57-secondary);
            margin-bottom: 20px;
            font-size: 16px;
        }

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

        .zpa57-footer-links li {
            margin-bottom: 12px;
        }

        .zpa57-footer-links a {
            color: #9ca3af;
            font-size: 14px;
        }

        .zpa57-footer-links a:hover {
            color: white;
        }

        .zpa57-copyright {
            text-align: center;
            padding-top: 32px;
            color: #6b7280;
            font-size: 13px;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .zpa57-nav-container {
                flex-direction: column;
                gap: 16px;
            }
            .zpa57-menu {
                justify-content: center;
            }
            .zpa57-hero {
                padding: 64px 24px;
            }
            .zpa57-grid-matrix {
                grid-template-columns: 1fr;
            }
            .zpa57-tutorial-layout {
                flex-direction: column;
            }
            .zpa57-sidebar {
                position: static;
                width: 100%;
            }
        }