:root {
            --f8a5-primary: #FF6600;
            --f8a5-secondary: #4A90E2;
            --f8a5-accent: #6C5CE7;
            --f8a5-dark: #1A1A1A;
            --f8a5-light: #F8F9FA;
            --f8a5-text: #333333;
            --f8a5-bg-gradient: linear-gradient(135deg, #FFF5F0 0%, #FFFFFF 100%);
            --f8a5-glass: rgba(255, 255, 255, 0.8);
            --f8a5-spacing-unit: 8px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            word-break: keep-all;
            overflow-wrap: break-word;
        }

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--f8a5-bg-gradient);
            color: var(--f8a5-text);
            line-height: 1.8;
            overflow-x: hidden;
        }

        /* Layout Container */
        .f8a5-wrapper {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Navigation */
        .f8a5-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: var(--f8a5-glass);
            backdrop-filter: blur(15px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .f8a5-nav-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            height: 80px;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 32px;
        }

        .f8a5-logo {
            min-width: 0;
            display: flex;
            align-items: center;
        }

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

        .f8a5-nav-list {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
            min-width: 0;
        }

        .f8a5-nav-item a {
            text-decoration: none;
            color: var(--f8a5-text);
            font-weight: 500;
            font-size: 1rem;
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.2s ease;
        }

        .f8a5-nav-item a:hover {
            color: var(--f8a5-primary);
            background: rgba(255, 102, 0, 0.05);
        }

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

        /* Hero Section */
        .f8a5-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            position: relative;
            overflow: hidden;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
        }

        .f8a5-hero-content {
            flex: 1;
            min-width: 320px;
            z-index: 2;
        }

        .f8a5-hero-badge {
            display: inline-block;
            background: linear-gradient(90deg, var(--f8a5-primary), #FF8C42);
            color: #fff;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            margin-bottom: 24px;
            box-shadow: 0 4px 12px rgba(255, 102, 0, 0.3);
        }

        .f8a5-hero h1 {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            color: var(--f8a5-dark);
            margin-bottom: 24px;
        }

        .f8a5-hero p {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: #666;
            max-width: 600px;
            margin-bottom: 48px;
        }

        .f8a5-hero-visual {
            flex: 1;
            min-width: 320px;
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }

        /* Decorative CSS Shapes for Dynamic Feel */
        .f8a5-dynamic-shape {
            width: 400px;
            height: 400px;
            background: linear-gradient(45deg, var(--f8a5-primary), var(--f8a5-accent));
            border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
            filter: blur(40px);
            opacity: 0.2;
            position: absolute;
            animation: f8a5-morph 10s infinite alternate;
        }

        @keyframes f8a5-morph {
            0% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
            100% { border-radius: 50% 50% 20% 80% / 25% 80% 20% 75%; }
        }

        /* Skin Showcase Grid */
        .f8a5-section {
            padding: 96px 0;
        }

        .f8a5-section-title {
            text-align: center;
            margin-bottom: 64px;
        }

        .f8a5-section-title h2 {
            font-size: clamp(2rem, 3vw + 0.5rem, 2.5rem);
            color: var(--f8a5-dark);
            margin-bottom: 16px;
        }

        .f8a5-skin-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            width: 100%;
        }

        .f8a5-skin-card {
            background: #fff;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            border: 1px solid rgba(0,0,0,0.02);
            position: relative;
        }

        .f8a5-skin-card:hover {
            transform: translateY(-12px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        }

        .f8a5-skin-preview {
            height: 200px;
            background: #eee;
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .f8a5-skin-preview::after {
            content: 'DYNAMIC PREVIEW';
            font-size: 0.8rem;
            letter-spacing: 2px;
            color: rgba(0,0,0,0.2);
            font-weight: 800;
        }

        .f8a5-skin-info {
            padding: 24px;
        }

        .f8a5-skin-name {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .f8a5-skin-meta {
            font-size: 0.9rem;
            color: #888;
            margin-bottom: 20px;
            display: flex;
            justify-content: space-between;
        }

        .f8a5-btn-download {
            display: block;
            text-align: center;
            background: var(--f8a5-light);
            color: var(--f8a5-text);
            text-decoration: none;
            padding: 12px;
            border-radius: 12px;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .f8a5-skin-card:hover .f8a5-btn-download {
            background: var(--f8a5-primary);
            color: #fff;
        }

        /* Features Horizontal Scroll/Flex */
        .f8a5-features {
            background: var(--f8a5-dark);
            color: #fff;
            border-radius: 40px;
            padding: 80px 48px;
            margin: 48px 0;
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }

        .f8a5-feature-item {
            flex: 1;
            min-width: 260px;
        }

        .f8a5-feature-icon {
            font-size: 2rem;
            margin-bottom: 24px;
            color: var(--f8a5-primary);
        }

        .f8a5-feature-item h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .f8a5-feature-item p {
            color: #aaa;
            line-height: 1.6;
        }

        /* CTA Section */
        .f8a5-cta {
            text-align: center;
            padding: 96px 0;
            background: linear-gradient(rgba(255, 102, 0, 0.05), rgba(255, 102, 0, 0.02));
            border-radius: 40px;
        }

        .f8a5-main-btn {
            display: inline-block;
            background: var(--f8a5-primary);
            color: #fff;
            text-decoration: none;
            padding: 20px 48px;
            border-radius: 16px;
            font-size: 1.25rem;
            font-weight: 700;
            box-shadow: 0 10px 20px rgba(255, 102, 0, 0.2);
            transition: all 0.3s ease;
        }

        .f8a5-main-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 15px 30px rgba(255, 102, 0, 0.3);
        }

        /* Footer */
        .f8a5-footer {
            background: #fff;
            padding: 80px 0 40px;
            border-top: 1px solid #eee;
        }

        .f8a5-footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            margin-bottom: 64px;
        }

        .f8a5-footer-brand {
            flex: 2;
            min-width: 300px;
        }

        .f8a5-footer-brand h2 {
            font-size: 1.5rem;
            color: var(--f8a5-primary);
            margin-bottom: 16px;
        }

        .f8a5-footer-links {
            flex: 1;
            min-width: 150px;
        }

        .f8a5-footer-links h4 {
            margin-bottom: 24px;
            font-size: 1.1rem;
        }

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

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

        .f8a5-footer-links a {
            text-decoration: none;
            color: #666;
            transition: color 0.2s;
        }

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

        .f8a5-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid #f0f0f0;
            color: #999;
            font-size: 0.9rem;
        }

        /* Mobile Adjustments */
        @media (max-width: 768px) {
            .f8a5-nav-list {
                display: none; /* In a real site, implement a burger menu */
            }
            .f8a5-hero {
                padding-top: 120px;
                text-align: center;
            }
            .f8a5-hero-content {
                order: 2;
            }
            .f8a5-hero-visual {
                order: 1;
                margin-bottom: 40px;
            }
            .f8a5-dynamic-shape {
                width: 250px;
                height: 250px;
            }
            .f8a5-features {
                padding: 48px 24px;
            }
        }