:root {
            --ysa473-primary: #FF7139;
            --ysa473-primary-dark: #E22B4F;
            --ysa473-secondary: #0060DF;
            --ysa473-bg-deep: #0B0E14;
            --ysa473-bg-card: #1C1C21;
            --ysa473-text-main: #F9F9FB;
            --ysa473-text-muted: #B1B1B3;
            --ysa473-gradient: linear-gradient(135deg, #FF9400 0%, #FF2F3B 50%, #AC17D7 100%);
            --ysa473-glass: rgba(255, 255, 255, 0.05);
            --ysa473-spacing-unit: 8px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--ysa473-bg-deep);
            color: var(--ysa473-text-main);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* Layout Container */
        .ysa473-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 5vw;
        }

        /* Navigation */
        .ysa473-nav-wrapper {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 14, 20, 0.8);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .ysa473-nav {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
        }

        .ysa473-logo {
            min-width: 0;
            flex: 0 0 auto;
        }

        .ysa473-logo img {
            height: 40px;
            width: auto;
            display: block;
        }

        .ysa473-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
            min-width: 0;
        }

        .ysa473-menu-item {
            min-width: 0;
        }

        .ysa473-menu-link {
            text-decoration: none;
            color: var(--ysa473-text-muted);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s ease;
            white-space: nowrap;
        }

        .ysa473-menu-link:hover {
            color: var(--ysa473-primary);
        }

        .ysa473-menu-link.ysa473-active {
            color: var(--ysa473-text-main);
            position: relative;
        }

        .ysa473-menu-link.ysa473-active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--ysa473-primary);
        }

        /* Hero Section */
        .ysa473-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .ysa473-hero::before {
            content: '';
            position: absolute;
            top: -20%;
            left: 50%;
            transform: translateX(-50%);
            width: 80vw;
            height: 80vw;
            background: radial-gradient(circle, rgba(255, 113, 57, 0.15) 0%, rgba(11, 14, 20, 0) 70%);
            z-index: -1;
        }

        .ysa473-hero-title {
            font-size: clamp(2rem, 5vw + 1rem, 4.5rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            background: var(--ysa473-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            word-break: break-word;
        }

        .ysa473-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.5rem);
            color: var(--ysa473-text-muted);
            max-width: 800px;
            margin: 0 auto 48px;
            word-break: break-word;
        }

        /* Bento Grid Layout */
        .ysa473-section {
            padding: 96px 0;
        }

        .ysa473-section-title {
            font-size: clamp(1.5rem, 3vw, 2.5rem);
            margin-bottom: 48px;
            text-align: center;
        }

        .ysa473-addon-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .ysa473-addon-card {
            background: var(--ysa473-bg-card);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: 24px;
            padding: 40px;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            display: flex;
            flex-direction: column;
            min-width: 0;
            position: relative;
            overflow: hidden;
        }

        .ysa473-addon-card:hover {
            transform: translateY(-10px);
            border-color: rgba(255, 113, 57, 0.3);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
        }

        .ysa473-addon-icon-box {
            width: 64px;
            height: 64px;
            background: var(--ysa473-glass);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            font-size: 32px;
        }

        .ysa473-addon-name {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--ysa473-text-main);
        }

        .ysa473-addon-desc {
            font-size: 16px;
            color: var(--ysa473-text-muted);
            margin-bottom: 32px;
            flex-grow: 1;
            line-height: 1.8;
            word-break: break-word;
        }

        .ysa473-addon-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(0, 96, 223, 0.1);
            color: var(--ysa473-secondary);
            border-radius: 100px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 16px;
            align-self: flex-start;
        }

        .ysa473-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 24px;
            border-radius: 12px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
        }

        .ysa473-btn-primary {
            background: var(--ysa473-primary);
            color: white;
        }

        .ysa473-btn-primary:hover {
            background: var(--ysa473-primary-dark);
            transform: scale(1.02);
        }

        /* Dynamic Content Section */
        .ysa473-dynamic-section {
            background: rgba(255, 255, 255, 0.02);
            border-radius: 48px;
            padding: 80px 5vw;
            margin: 48px 0;
        }

        /* Footer */
        .ysa473-footer {
            padding: 96px 0 48px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
        }

        .ysa473-footer-brand {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .ysa473-footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 32px;
            margin-bottom: 48px;
            list-style: none;
        }

        .ysa473-footer-link {
            color: var(--ysa473-text-muted);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s ease;
        }

        .ysa473-footer-link:hover {
            color: var(--ysa473-text-main);
        }

        .ysa473-copyright {
            color: var(--ysa473-text-muted);
            font-size: 12px;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .ysa473-menu {
                display: none; /* In a real scenario, implement a hamburger menu */
            }
            .ysa473-hero-title {
                font-size: 2.5rem;
            }
            .ysa473-addon-grid {
                grid-template-columns: 1fr;
            }
            .ysa473-addon-card {
                padding: 30px;
            }
        }

        /* Custom decorative elements */
        .ysa473-blob {
            position: absolute;
            z-index: -1;
            filter: blur(60px);
            opacity: 0.4;
        }

        .ysa473-blob-1 {
            top: 10%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: var(--ysa473-primary);
            border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
        }