:root {
            --f8a5-primary: #FF4B33;
            --f8a5-primary-hover: #E63E29;
            --f8a5-accent: #3366FF;
            --f8a5-dark: #1D1D1F;
            --f8a5-text: #333333;
            --f8a5-text-light: #666666;
            --f8a5-bg: #FFFFFF;
            --f8a5-bg-alt: #F5F7FA;
            --f8a5-radius: 16px;
            --f8a5-transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
            --f8a5-max-width: 1400px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--f8a5-text);
            background-color: var(--f8a5-bg);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--f8a5-transition);
        }

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

        /* Layout Helpers */
        .f8a5-container {
            max-width: var(--f8a5-max-width);
            margin: 0 auto;
            padding: 0 48px;
            width: 100%;
        }

        .f8a5-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .f8a5-grid {
            display: grid;
            gap: 32px;
        }

        /* Navigation */
        .f8a5-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            height: 80px;
            display: flex;
            align-items: center;
        }

        .f8a5-nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }

        .f8a5-logo {
            flex-shrink: 0;
        }

        .f8a5-logo img {
            height: 40px;
            width: auto;
        }

        .f8a5-menu {
            display: flex;
            list-style: none;
            gap: 8px;
        }

        .f8a5-menu-item a {
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--f8a5-text-light);
            border-radius: 8px;
        }

        .f8a5-menu-item a:hover {
            color: var(--f8a5-primary);
            background: rgba(255, 75, 51, 0.05);
        }

        .f8a5-menu-item a.f8a5-active {
            color: var(--f8a5-primary);
            font-weight: 700;
        }

        /* Hero Section */
        .f8a5-hero {
            padding: 160px 0 96px;
            background: radial-gradient(circle at top right, #FFF5F4 0%, #FFFFFF 100%);
            position: relative;
            overflow: hidden;
        }

        .f8a5-hero-content {
            flex: 1;
            min-width: 0;
            z-index: 2;
        }

        .f8a5-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            color: var(--f8a5-dark);
            word-break: break-word;
        }

        .f8a5-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.5rem);
            color: var(--f8a5-text-light);
            margin-bottom: 48px;
            max-width: 600px;
            word-break: break-word;
        }

        .f8a5-hero-visual {
            flex: 1.2;
            min-width: 0;
            position: relative;
        }

        .f8a5-hero-image-box {
            position: relative;
            transform: perspective(1000px) rotateY(-10deg);
            box-shadow: 0 50px 100px -20px rgba(0,0,0,0.15);
            border-radius: 24px;
            overflow: hidden;
            transition: var(--f8a5-transition);
        }

        .f8a5-hero-image-box:hover {
            transform: perspective(1000px) rotateY(0deg) scale(1.02);
        }

        .f8a5-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .f8a5-btn {
            padding: 16px 40px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 18px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
        }

        .f8a5-btn-primary {
            background: var(--f8a5-primary);
            color: white;
            box-shadow: 0 10px 20px rgba(255, 75, 51, 0.2);
        }

        .f8a5-btn-primary:hover {
            background: var(--f8a5-primary-hover);
            transform: translateY(-2px);
        }

        /* AI Engine Section */
        .f8a5-ai-section {
            padding: 96px 0;
            background: var(--f8a5-bg);
        }

        .f8a5-section-tag {
            display: inline-block;
            color: var(--f8a5-primary);
            background: rgba(255, 75, 51, 0.1);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .f8a5-section-header {
            max-width: 800px;
            margin-bottom: 64px;
        }

        .f8a5-section-title {
            font-size: clamp(2rem, 3vw + 0.5rem, 3rem);
            margin-bottom: 24px;
            color: var(--f8a5-dark);
        }

        .f8a5-ai-grid {
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            align-items: center;
        }

        .f8a5-ai-info {
            min-width: 0;
        }

        .f8a5-ai-card {
            background: var(--f8a5-bg-alt);
            padding: 40px;
            border-radius: var(--f8a5-radius);
            margin-bottom: 24px;
            border: 1px solid rgba(0,0,0,0.03);
            transition: var(--f8a5-transition);
        }

        .f8a5-ai-card:hover {
            background: white;
            box-shadow: 0 20px 40px rgba(0,0,0,0.05);
            transform: translateX(10px);
        }

        .f8a5-ai-card h3 {
            font-size: 24px;
            margin-bottom: 12px;
            color: var(--f8a5-primary);
        }

        .f8a5-ai-visual img {
            border-radius: 24px;
            box-shadow: 0 30px 60px rgba(0,0,0,0.1);
        }

        /* Cloud Sync Section */
        .f8a5-cloud-section {
            padding: 96px 0;
            background: #0D0D0E;
            color: white;
            border-radius: 48px;
            margin: 0 24px;
        }

        .f8a5-cloud-flex {
            align-items: center;
            gap: 64px;
        }

        .f8a5-cloud-visual {
            flex: 1;
            min-width: 0;
        }

        .f8a5-cloud-content {
            flex: 1;
            min-width: 0;
        }

        .f8a5-cloud-content h2 {
            font-size: clamp(2rem, 3vw, 2.8rem);
            margin-bottom: 24px;
        }

        .f8a5-cloud-list {
            list-style: none;
        }

        .f8a5-cloud-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            margin-bottom: 32px;
        }

        .f8a5-cloud-icon-box {
            font-size: 24px;
            background: rgba(255,255,255,0.1);
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        /* Immersive Experience */
        .f8a5-immersive-section {
            padding: 128px 0;
            text-align: center;
        }

        .f8a5-immersive-image {
            margin-top: 64px;
            max-width: 1000px;
            margin-left: auto;
            margin-right: auto;
            border-radius: 32px;
            overflow: hidden;
            position: relative;
        }

        .f8a5-immersive-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, transparent 60%, rgba(255,255,255,0.8));
        }

        /* Dynamic Content Section */
        .f8a5-dynamic-section {
            padding: 96px 0;
            background: var(--f8a5-bg-alt);
        }

        .f8a5-article-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 24px;
        }

        .f8a5-article-card {
            background: white;
            padding: 32px;
            border-radius: 20px;
            transition: var(--f8a5-transition);
        }

        .f8a5-article-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.05);
        }

        /* Footer */
        .f8a5-footer {
            background: var(--f8a5-dark);
            color: rgba(255,255,255,0.6);
            padding: 80px 0 40px;
        }

        .f8a5-footer-grid {
            display: grid;
            grid-template-columns: 2fr repeat(3, 1fr);
            gap: 48px;
            margin-bottom: 64px;
        }

        .f8a5-footer-brand {
            font-size: 24px;
            font-weight: 800;
            color: white;
            margin-bottom: 24px;
        }

        .f8a5-footer-links h4 {
            color: white;
            margin-bottom: 24px;
            font-size: 16px;
        }

        .f8a5-footer-links ul {
            list-style: none;
        }

        .f8a5-footer-links li {
            margin-bottom: 12px;
        }

        .f8a5-footer-links a:hover {
            color: var(--f8a5-primary);
        }

        .f8a5-footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 40px;
            text-align: center;
            font-size: 14px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .f8a5-container { padding: 0 32px; }
            .f8a5-footer-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            .f8a5-header { height: 70px; }
            .f8a5-menu { display: none; } /* Simplified for mobile */
            .f8a5-hero { padding: 120px 0 64px; }
            .f8a5-flex { flex-direction: column; }
            .f8a5-ai-grid { grid-template-columns: 1fr; }
            .f8a5-cloud-section { margin: 0; border-radius: 0; }
            .f8a5-footer-grid { grid-template-columns: 1fr; }
            .f8a5-hero-title { text-align: center; }
            .f8a5-hero-subtitle { text-align: center; margin-inline: auto; }
            .f8a5-cta-group { justify-content: center; }
            .f8a5-hero-image-box { transform: none; margin-top: 48px; }
        }