:root {
            --xa698d-primary: #1A9E5D;
            --xa698d-primary-light: #E8F5EE;
            --xa698d-secondary: #2C3E50;
            --xa698d-accent: #FF6B6B;
            --xa698d-text: #333333;
            --xa698d-text-light: #666666;
            --xa698d-bg: #FFFFFF;
            --xa698d-bg-soft: #F8FAFA;
            --xa698d-shadow: 0 10px 30px rgba(0,0,0,0.05);
            --xa698d-radius: 16px;
            --xa698d-container: 1100px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--xa698d-text);
            line-height: 1.8;
            background-color: var(--xa698d-bg);
            word-break: break-word;
            overflow-wrap: break-word;
        }

        /* Navigation */
        .xa698d-nav-wrapper {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(15px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .xa698d-nav-container {
            max-width: var(--xa698d-container);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            height: 72px;
        }

        .xa698d-logo {
            flex: 0 0 auto;
            min-width: 0;
            display: flex;
            align-items: center;
        }

        .xa698d-logo img {
            height: 32px;
            width: auto;
        }

        .xa698d-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
        }

        .xa698d-menu-item a {
            text-decoration: none;
            color: var(--xa698d-text-light);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .xa698d-menu-item a:hover {
            color: var(--xa698d-primary);
            background: var(--xa698d-primary-light);
        }

        .xa698d-menu-item a.xa698d-active {
            color: var(--xa698d-primary);
            background: var(--xa698d-primary-light);
        }

        /* Hero Section */
        .xa698d-hero {
            padding: 160px 24px 80px;
            background: radial-gradient(circle at top right, #f0fdf4, #ffffff);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .xa698d-hero-inner {
            max-width: 800px;
            margin: 0 auto;
        }

        .xa698d-hero-tag {
            display: inline-block;
            background: var(--xa698d-primary-light);
            color: var(--xa698d-primary);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .xa698d-hero h1 {
            font-size: clamp(2rem, 5vw + 1rem, 3.5rem);
            line-height: 1.2;
            color: var(--xa698d-secondary);
            margin-bottom: 24px;
            font-weight: 800;
            word-break: keep-all;
        }

        .xa698d-hero p {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--xa698d-text-light);
            max-width: 600px;
            margin: 0 auto 40px;
        }

        /* UI Formula Bar Mockup */
        .xa698d-formula-bar {
            max-width: 900px;
            margin: 40px auto 0;
            background: white;
            border: 2px solid #eee;
            border-radius: 12px;
            display: flex;
            align-items: center;
            padding: 12px 20px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.04);
            text-align: left;
        }

        .xa698d-formula-fx {
            font-family: serif;
            font-style: italic;
            font-weight: bold;
            color: #999;
            margin-right: 15px;
            font-size: 20px;
        }

        .xa698d-formula-input {
            flex: 1;
            font-family: "Courier New", Courier, monospace;
            color: var(--xa698d-primary);
            font-size: 18px;
            font-weight: 600;
        }

        /* Optimization Layers Section */
        .xa698d-section {
            padding: 96px 24px;
            max-width: var(--xa698d-container);
            margin: 0 auto;
        }

        .xa698d-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .xa698d-layer-card {
            background: var(--xa698d-bg-soft);
            padding: 40px;
            border-radius: var(--xa698d-radius);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: 1px solid rgba(0,0,0,0.03);
            min-width: 0;
        }

        .xa698d-layer-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--xa698d-shadow);
            background: white;
        }

        .xa698d-layer-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--xa698d-secondary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .xa698d-layer-name::before {
            content: "";
            width: 8px;
            height: 24px;
            background: var(--xa698d-primary);
            border-radius: 4px;
        }

        .xa698d-tech-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 20px;
        }

        .xa698d-tech-tag {
            font-size: 12px;
            background: white;
            padding: 4px 10px;
            border-radius: 4px;
            border: 1px solid #eee;
            color: var(--xa698d-text-light);
        }

        /* Matrix Section */
        .xa698d-matrix-container {
            background: var(--xa698d-secondary);
            color: white;
            padding: 96px 24px;
            border-radius: 40px;
            margin: 0 24px;
        }

        .xa698d-matrix-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .xa698d-matrix-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            justify-content: center;
        }

        .xa698d-version-card {
            flex: 1;
            min-width: 300px;
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.1);
            padding: 32px;
            border-radius: 24px;
            transition: all 0.3s ease;
        }

        .xa698d-version-card:hover {
            background: rgba(255,255,255,0.1);
            border-color: var(--xa698d-primary);
        }

        .xa698d-version-id {
            font-size: 12px;
            color: var(--xa698d-primary);
            font-weight: 700;
            letter-spacing: 1px;
            margin-bottom: 8px;
        }

        .xa698d-version-title {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .xa698d-spec-list {
            list-style: none;
            margin: 24px 0;
            font-size: 14px;
            opacity: 0.8;
        }

        .xa698d-spec-list li {
            margin-bottom: 8px;
            padding-left: 20px;
            position: relative;
        }

        .xa698d-spec-list li::before {
            content: "•";
            position: absolute;
            left: 0;
            color: var(--xa698d-primary);
        }

        /* Knowledge Base */
        .xa698d-articles-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .xa698d-article-item {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 24px;
            background: white;
            border: 1px solid #eee;
            border-radius: 12px;
            transition: all 0.3s ease;
        }

        .xa698d-article-item:hover {
            border-color: var(--xa698d-primary);
            box-shadow: var(--xa698d-shadow);
        }

        .xa698d-article-info {
            flex: 1;
            min-width: 280px;
        }

        .xa698d-article-topic {
            font-size: 18px;
            font-weight: 600;
            color: var(--xa698d-secondary);
            margin-bottom: 8px;
        }

        .xa698d-tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .xa698d-article-tag {
            font-size: 12px;
            color: var(--xa698d-text-light);
            background: #f0f0f0;
            padding: 2px 8px;
            border-radius: 4px;
        }

        .xa698d-complexity {
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            padding: 4px 12px;
            border-radius: 50px;
        }

        .xa698d-complexity.初级 { background: #e0f2f1; color: #00897b; }
        .xa698d-complexity.中级 { background: #fff3e0; color: #fb8c00; }
        .xa698d-complexity.高级 { background: #ffebee; color: #e53935; }

        /* Testimonials */
        .xa698d-feedback-section {
            background: var(--xa698d-bg-soft);
            padding: 80px 24px;
        }

        .xa698d-feedback-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
            max-width: var(--xa698d-container);
            margin: 0 auto;
        }

        .xa698d-feedback-card {
            background: white;
            padding: 32px;
            border-radius: 20px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.03);
        }

        .xa698d-user-role {
            font-weight: 700;
            color: var(--xa698d-primary);
            margin-bottom: 12px;
            font-size: 14px;
        }

        .xa698d-rating {
            color: #FFB800;
            margin-top: 16px;
            font-weight: 700;
        }

        /* Footer */
        .xa698d-footer {
            padding: 80px 24px 40px;
            border-top: 1px solid #eee;
            text-align: center;
        }

        .xa698d-footer-brand {
            font-size: 24px;
            font-weight: 800;
            color: var(--xa698d-secondary);
            margin-bottom: 16px;
        }

        .xa698d-footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
            margin-bottom: 32px;
            list-style: none;
        }

        .xa698d-footer-links a {
            text-decoration: none;
            color: var(--xa698d-text-light);
            font-size: 14px;
        }

        .xa698d-copyright {
            font-size: 13px;
            color: #999;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .xa698d-nav-container {
                height: auto;
                padding: 16px;
            }
            .xa698d-menu {
                margin-top: 16px;
                justify-content: center;
                width: 100%;
            }
            .xa698d-hero h1 {
                font-size: 2.5rem;
            }
            .xa698d-matrix-container {
                margin: 0;
                border-radius: 0;
            }
        }