:root {
            --u25mzy-primary: #0D47A1;
            --u25mzy-accent: #1976D2;
            --u25mzy-bg: #F8FAFC;
            --u25mzy-text: #1E293B;
            --u25mzy-text-light: #64748B;
            --u25mzy-white: #FFFFFF;
            --u25mzy-shadow: 0 10px 30px -10px rgba(13, 71, 161, 0.1);
            --u25mzy-radius: 16px;
            --u25mzy-container-width: 1300px;
        }

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

        body {
            font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--u25mzy-bg);
            color: var(--u25mzy-text);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Utility */
        .u25mzy-container {
            max-width: var(--u25mzy-container-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        .u25mzy-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .u25mzy-flex > * {
            min-width: 0;
        }

        .u25mzy-text-center { text-align: center; }
        .u25mzy-break { word-break: keep-all; overflow-wrap: break-word; }

        /* Navigation */
        .u25mzy-navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            padding: 12px 0;
        }

        .u25mzy-nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

        .u25mzy-logo img {
            height: 36px;
            display: block;
        }

        .u25mzy-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
        }

        .u25mzy-nav-item a {
            text-decoration: none;
            color: var(--u25mzy-text-light);
            font-size: 0.95rem;
            padding: 8px 16px;
            border-radius: 8px;
            transition: all 0.3s ease;
            font-weight: 500;
        }

        .u25mzy-nav-item a:hover {
            color: var(--u25mzy-primary);
            background: rgba(13, 71, 161, 0.05);
        }

        .u25mzy-nav-item a.u25mzy-active {
            color: var(--u25mzy-white);
            background: var(--u25mzy-primary);
        }

        /* Hero Section */
        .u25mzy-hero {
            padding: 160px 0 80px;
            background: radial-gradient(circle at 80% 20%, rgba(25, 118, 210, 0.08), transparent 40%),
                        radial-gradient(circle at 10% 80%, rgba(13, 71, 161, 0.05), transparent 40%);
            position: relative;
        }

        .u25mzy-hero-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 64px;
            align-items: center;
        }

        .u25mzy-hero-content h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            line-height: 1.2;
            margin-bottom: 24px;
            color: var(--u25mzy-primary);
            font-weight: 800;
        }

        .u25mzy-hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.35rem);
            color: var(--u25mzy-text-light);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .u25mzy-download-box {
            background: var(--u25mzy-white);
            padding: 40px;
            border-radius: 24px;
            box-shadow: var(--u25mzy-shadow);
            border: 1px solid rgba(255, 255, 255, 0.5);
        }

        .u25mzy-btn-primary {
            display: inline-block;
            background: linear-gradient(135deg, var(--u25mzy-primary), var(--u25mzy-accent));
            color: white;
            padding: 18px 48px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            box-shadow: 0 10px 20px rgba(13, 71, 161, 0.2);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            width: 100%;
            text-align: center;
        }

        .u25mzy-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(13, 71, 161, 0.3);
        }

        /* OS Support Bar */
        .u25mzy-os-bar {
            margin-top: 48px;
            padding: 24px;
            background: rgba(255, 255, 255, 0.5);
            border-radius: var(--u25mzy-radius);
            display: flex;
            align-items: center;
            gap: 24px;
        }

        .u25mzy-os-img {
            max-width: 280px;
            border-radius: 8px;
        }

        /* Scenario Section */
        .u25mzy-scenarios {
            padding: 96px 0;
            background: var(--u25mzy-white);
        }

        .u25mzy-section-header {
            margin-bottom: 64px;
        }

        .u25mzy-section-header h2 {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

        .u25mzy-grid-scenarios {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .u25mzy-scenario-card {
            padding: 40px;
            border-radius: var(--u25mzy-radius);
            background: var(--u25mzy-bg);
            transition: all 0.4s ease;
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .u25mzy-scenario-card:hover {
            transform: translateY(-8px);
            background: #EFF6FF;
        }

        .u25mzy-tag {
            background: var(--u25mzy-primary);
            color: white;
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 0.8rem;
            display: inline-block;
            margin-bottom: 16px;
        }

        .u25mzy-workflow {
            margin-top: auto;
            padding-top: 24px;
            border-top: 1px dashed #CBD5E1;
            font-size: 0.9rem;
            color: var(--u25mzy-text-light);
        }

        /* PC Feature Section */
        .u25mzy-pc-showcase {
            padding: 96px 0;
        }

        .u25mzy-split-layout {
            display: flex;
            align-items: center;
            gap: 64px;
            flex-wrap: wrap;
        }

        .u25mzy-split-img {
            flex: 1;
            min-width: 300px;
        }

        .u25mzy-split-img img {
            width: 100%;
            border-radius: 24px;
            box-shadow: var(--u25mzy-shadow);
        }

        .u25mzy-split-text {
            flex: 1;
            min-width: 300px;
        }

        /* Mobile Section */
        .u25mzy-mobile-app {
            padding: 96px 0;
            background: linear-gradient(135deg, #0D47A1 0%, #002171 100%);
            color: white;
            border-radius: 40px;
            margin: 48px 24px;
        }

        .u25mzy-mobile-grid {
            display: flex;
            align-items: center;
            gap: 64px;
            flex-wrap: wrap;
        }

        .u25mzy-mobile-img {
            flex: 1;
            text-align: center;
        }

        .u25mzy-mobile-img img {
            max-width: 100%;
            border-radius: 20px;
        }

        /* Success Stories */
        .u25mzy-success {
            padding: 96px 0;
        }

        .u25mzy-success-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 24px;
        }

        .u25mzy-success-card {
            background: white;
            padding: 32px;
            border-radius: var(--u25mzy-radius);
            border-left: 6px solid var(--u25mzy-primary);
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
        }

        /* Footer */
        .u25mzy-footer {
            background: #0F172A;
            color: #94A3B8;
            padding: 80px 0 40px;
        }

        .u25mzy-footer-brand {
            font-size: 1.5rem;
            color: white;
            font-weight: 700;
            margin-bottom: 24px;
        }

        .u25mzy-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .u25mzy-footer-links h4 {
            color: white;
            margin-bottom: 24px;
        }

        .u25mzy-footer-links ul {
            list-style: none;
        }

        .u25mzy-footer-links li {
            margin-bottom: 12px;
        }

        .u25mzy-footer-links a {
            color: #94A3B8;
            text-decoration: none;
            transition: color 0.3s;
        }

        .u25mzy-footer-links a:hover {
            color: white;
        }

        .u25mzy-footer-bottom {
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            font-size: 0.9rem;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .u25mzy-nav-menu {
                display: none; /* In a real site, implement a hamburger menu */
            }
            .u25mzy-hero-grid {
                grid-template-columns: 1fr;
            }
            .u25mzy-split-layout {
                flex-direction: column-reverse;
            }
            .u25mzy-mobile-grid {
                flex-direction: column;
            }
        }