:root {
            --su5w0x-primary: #FF7139;
            --su5w0x-secondary: #FFE900;
            --su5w0x-accent: #0060DF;
            --su5w0x-dark: #20123A;
            --su5w0x-light: #F9F9FB;
            --su5w0x-text: #15141A;
            --su5w0x-white: #FFFFFF;
            --su5w0x-gray: #5B5B66;
            --su5w0x-spacing-unit: 8px;
            --su5w0x-max-width: 1400px;
        }

        * {
            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;
            color: var(--su5w0x-text);
            background-color: var(--su5w0x-white);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* Typography */
        h1 { font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem); line-height: 1.1; font-weight: 900; word-break: keep-all; }
        h2 { font-size: clamp(1.8rem, 3vw + 0.5rem, 2.8rem); line-height: 1.2; font-weight: 800; margin-bottom: calc(var(--su5w0x-spacing-unit) * 3); }
        h3 { font-size: clamp(1.3rem, 2vw + 0.2rem, 1.8rem); font-weight: 700; }
        p { font-size: clamp(1rem, 0.5vw + 0.8rem, 1.2rem); color: var(--su5w0x-gray); line-height: 1.7; }

        /* Layout Helpers */
        .su5w0x-container {
            max-width: var(--su5w0x-max-width);
            margin: 0 auto;
            padding: 0 calc(var(--su5w0x-spacing-unit) * 4);
        }

        .su5w0x-flex { display: flex; flex-wrap: wrap; }
        .su5w0x-flex-item { min-width: 0; }

        /* Navigation */
        .su5w0x-header {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .su5w0x-nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
            max-width: var(--su5w0x-max-width);
            margin: 0 auto;
            padding: 0 calc(var(--su5w0x-spacing-unit) * 4);
        }

        .su5w0x-logo {
            flex: 0 0 auto;
            display: flex;
            align-items: center;
        }

        .su5w0x-logo img {
            height: 48px;
            width: auto;
        }

        .su5w0x-nav-menu {
            display: flex;
            list-style: none;
            gap: calc(var(--su5w0x-spacing-unit) * 3);
        }

        .su5w0x-nav-link {
            text-decoration: none;
            color: var(--su5w0x-text);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.2s ease;
        }

        .su5w0x-nav-link:hover {
            color: var(--su5w0x-primary);
            background: rgba(255, 113, 57, 0.05);
        }

        .su5w0x-nav-link.su5w0x-active {
            color: var(--su5w0x-primary);
            background: rgba(255, 113, 57, 0.1);
        }

        /* Hero Section */
        .su5w0x-hero {
            position: relative;
            padding: 160px 0 100px;
            background: var(--su5w0x-dark);
            color: var(--su5w0x-white);
            overflow: hidden;
        }

        .su5w0x-hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.4;
            mix-blend-mode: luminosity;
        }

        .su5w0x-hero-content {
            position: relative;
            z-index: 2;
            max-width: 850px;
        }

        .su5w0x-hero-tagline {
            display: inline-block;
            background: var(--su5w0x-primary);
            color: var(--su5w0x-white);
            padding: 6px 16px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .su5w0x-hero-title {
            margin-bottom: 32px;
            background: linear-gradient(to right, #fff, var(--su5w0x-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .su5w0x-hero-subtitle {
            font-size: 1.4rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 48px;
            max-width: 600px;
        }

        .su5w0x-btn {
            display: inline-flex;
            align-items: center;
            padding: 18px 40px;
            border-radius: 12px;
            font-weight: 700;
            text-decoration: none;
            transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            cursor: pointer;
            border: none;
        }

        .su5w0x-btn-primary {
            background: var(--su5w0x-primary);
            color: var(--su5w0x-white);
            box-shadow: 0 10px 20px rgba(255, 113, 57, 0.3);
        }

        .su5w0x-btn-primary:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(255, 113, 57, 0.4);
        }

        /* Manifest Area */
        .su5w0x-manifesto {
            padding: 100px 0;
            background: var(--su5w0x-light);
        }

        .su5w0x-grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 40px;
        }

        .su5w0x-manifesto-card {
            background: var(--su5w0x-white);
            padding: 48px;
            border-radius: 24px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            transition: transform 0.3s ease;
        }

        .su5w0x-manifesto-card:hover {
            transform: translateY(-10px);
        }

        .su5w0x-card-num {
            font-size: 3rem;
            font-weight: 900;
            color: rgba(255, 113, 57, 0.1);
            margin-bottom: 16px;
        }

        /* Split Section Design */
        .su5w0x-split-section {
            padding: 100px 0;
            display: flex;
            align-items: center;
            gap: 80px;
        }

        .su5w0x-split-reverse {
            flex-direction: row-reverse;
        }

        .su5w0x-split-image {
            flex: 1;
            min-width: 300px;
            border-radius: 32px;
            overflow: hidden;
            box-shadow: 0 30px 60px rgba(0,0,0,0.1);
        }

        .su5w0x-split-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        .su5w0x-split-text {
            flex: 1;
            min-width: 300px;
        }

        /* Dynamic Section */
        .su5w0x-dynamic-section {
            padding: 100px 0;
            background: #fff;
        }

        .su5w0x-section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 64px;
        }

        /* Footer */
        .su5w0x-footer {
            background: var(--su5w0x-dark);
            color: var(--su5w0x-white);
            padding: 100px 0 40px;
            position: relative;
            overflow: hidden;
        }

        .su5w0x-footer-art {
            position: absolute;
            right: 0;
            bottom: 0;
            width: 40%;
            opacity: 0.15;
            pointer-events: none;
        }

        .su5w0x-footer-content {
            display: flex;
            justify-content: space-between;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            padding-bottom: 64px;
            margin-bottom: 40px;
        }

        .su5w0x-footer-brand h2 {
            margin-bottom: 16px;
            color: var(--su5w0x-white);
        }

        .su5w0x-footer-links {
            display: flex;
            gap: 80px;
        }

        .su5w0x-footer-col h4 {
            font-size: 1.1rem;
            margin-bottom: 24px;
            color: var(--su5w0x-secondary);
        }

        .su5w0x-footer-col ul {
            list-style: none;
        }

        .su5w0x-footer-col ul li {
            margin-bottom: 12px;
        }

        .su5w0x-footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            transition: color 0.2s;
        }

        .su5w0x-footer-col ul li a:hover {
            color: var(--su5w0x-white);
        }

        .su5w0x-footer-bottom {
            text-align: center;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .su5w0x-split-section { gap: 40px; }
            .su5w0x-footer-links { gap: 40px; }
        }

        @media (max-width: 768px) {
            .su5w0x-nav-menu { display: none; } /* In real use, a hamburger menu would go here */
            .su5w0x-split-section { flex-direction: column !important; text-align: center; }
            .su5w0x-footer-content { flex-direction: column; gap: 48px; }
            .su5w0x-hero { padding: 120px 0 60px; text-align: center; }
            .su5w0x-hero-subtitle { margin: 0 auto 32px; }
        }