:root {
            --x7bg-primary: #FF6600;
            --x7bg-primary-hover: #E65C00;
            --x7bg-dark: #1D1D1F;
            --x7bg-text: #333333;
            --x7bg-text-light: #666666;
            --x7bg-bg: #FFFFFF;
            --x7bg-bg-soft: #F9FAFB;
            --x7bg-radius: 16px;
            --x7bg-container: 1400px;
            --x7bg-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--x7bg-text);
            background-color: var(--x7bg-bg);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--x7bg-transition);
        }

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

        /* Layout Helpers */
        .x7bg-container {
            max-width: var(--x7bg-container);
            margin: 0 auto;
            padding: 0 32px;
            width: 100%;
        }

        .x7bg-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .x7bg-grid {
            display: grid;
            gap: 24px;
        }

        /* Navigation */
        .x7bg-nav-wrapper {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .x7bg-nav {
            height: 72px;
            align-items: center;
            justify-content: space-between;
        }

        .x7bg-logo {
            flex: 0 0 auto;
            min-width: 0;
            height: 32px;
        }

        .x7bg-logo img {
            height: 100%;
            width: auto;
        }

        .x7bg-menu {
            align-items: center;
            gap: 24px;
            list-style: none;
        }

        .x7bg-menu-item a {
            font-size: 15px;
            font-weight: 500;
            color: var(--x7bg-text);
        }

        .x7bg-menu-item a:hover {
            color: var(--x7bg-primary);
        }

        .x7bg-btn-download-nav {
            background: var(--x7bg-primary);
            color: white !important;
            padding: 8px 20px;
            border-radius: 40px;
            font-size: 14px;
        }

        .x7bg-btn-download-nav:hover {
            background: var(--x7bg-primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(255, 102, 0, 0.2);
        }

        /* Hero Section */
        .x7bg-hero {
            position: relative;
            padding-top: 72px;
            min-height: 90vh;
            display: flex;
            align-items: center;
            background: var(--x7bg-bg-soft);
            overflow: hidden;
        }

        .x7bg-hero-bg {
            position: absolute;
            top: 0;
            right: 0;
            width: 65%;
            height: 100%;
            z-index: 1;
        }

        .x7bg-hero-bg img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            mask-image: linear-gradient(to left, black 70%, transparent);
        }

        .x7bg-hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .x7bg-hero-card {
            max-width: 640px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(30px);
            padding: 64px;
            border-radius: var(--x7bg-radius);
            box-shadow: 0 40px 80px rgba(0,0,0,0.1);
            min-width: 0;
        }

        .x7bg-hero-title {
            font-size: clamp(2.5rem, 5vw, 4rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            color: var(--x7bg-dark);
            word-break: break-word;
        }

        .x7bg-hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
            color: var(--x7bg-text-light);
            margin-bottom: 40px;
            max-width: 500px;
            line-height: 1.5;
        }

        .x7bg-hero-actions {
            gap: 16px;
        }

        .x7bg-btn-primary {
            background: var(--x7bg-primary);
            color: white;
            padding: 16px 40px;
            border-radius: 12px;
            font-size: 18px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
        }

        .x7bg-btn-primary:hover {
            background: var(--x7bg-primary-hover);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(255, 102, 0, 0.2);
        }

        /* Efficiency Solutions Section */
        .x7bg-section-padding {
            padding: 96px 0;
        }

        .x7bg-section-header {
            text-align: center;
            margin-bottom: 64px;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }

        .x7bg-section-title {
            font-size: clamp(2rem, 4vw, 2.5rem);
            margin-bottom: 16px;
            color: var(--x7bg-dark);
        }

        .x7bg-efficiency-grid {
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
        }

        .x7bg-efficiency-card {
            background: var(--x7bg-bg-soft);
            padding: 48px;
            border-radius: var(--x7bg-radius);
            border: 1px solid transparent;
            min-width: 0;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .x7bg-efficiency-card:hover {
            background: white;
            border-color: var(--x7bg-primary);
            box-shadow: 0 20px 40px rgba(0,0,0,0.05);
            transform: translateY(-8px);
        }

        .x7bg-scenario-tag {
            color: var(--x7bg-primary);
            font-weight: 700;
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 16px;
            display: block;
        }

        .x7bg-efficiency-tools {
            list-style: none;
            margin: 24px 0;
        }

        .x7bg-efficiency-tools li {
            margin-bottom: 12px;
            padding-left: 24px;
            position: relative;
            color: var(--x7bg-text-light);
            font-size: 15px;
        }

        .x7bg-efficiency-tools li::before {
            content: "•";
            position: absolute;
            left: 0;
            color: var(--x7bg-primary);
            font-weight: bold;
        }

        .x7bg-boost-badge {
            display: inline-block;
            background: var(--x7bg-primary);
            color: white;
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 13px;
            font-weight: bold;
            margin-top: auto;
        }

        /* Feature Highlight Block */
        .x7bg-feature-block {
            align-items: center;
            gap: 64px;
            margin-bottom: 128px;
        }

        .x7bg-feature-block:nth-child(even) {
            flex-direction: row-reverse;
        }

        .x7bg-feature-text {
            flex: 1;
            min-width: 320px;
        }

        .x7bg-feature-image {
            flex: 1.2;
            min-width: 320px;
            border-radius: var(--x7bg-radius);
            overflow: hidden;
            box-shadow: 0 30px 60px rgba(0,0,0,0.1);
        }

        .x7bg-feature-image img {
            width: 100%;
            transition: transform 0.8s ease;
        }

        .x7bg-feature-block:hover .x7bg-feature-image img {
            transform: scale(1.05);
        }

        .x7bg-feature-desc {
            font-size: 18px;
            color: var(--x7bg-text-light);
            margin-top: 24px;
            line-height: 1.8;
        }

        /* News Section */
        .x7bg-news-section {
            background: var(--x7bg-dark);
            color: white;
            border-radius: 32px;
            padding: 80px 64px;
            margin-bottom: 96px;
        }

        .x7bg-news-title {
            color: white;
            margin-bottom: 48px;
        }

        .x7bg-news-grid {
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        }

        .x7bg-news-item {
            padding-bottom: 24px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }

        .x7bg-news-date {
            font-size: 14px;
            color: var(--x7bg-primary);
            margin-bottom: 8px;
            display: block;
        }

        .x7bg-news-link {
            font-size: 18px;
            font-weight: 500;
            display: block;
        }

        .x7bg-news-link:hover {
            color: var(--x7bg-primary);
            transform: translateX(10px);
        }

        /* Footer */
        .x7bg-footer {
            background: var(--x7bg-bg-soft);
            padding: 96px 0 48px;
            border-top: 1px solid rgba(0,0,0,0.05);
        }

        .x7bg-footer-grid {
            grid-template-columns: 2fr repeat(4, 1fr);
            margin-bottom: 64px;
        }

        .x7bg-footer-brand {
            font-size: 24px;
            font-weight: 800;
            color: var(--x7bg-dark);
            margin-bottom: 16px;
        }

        .x7bg-footer-slogan {
            color: var(--x7bg-text-light);
            max-width: 300px;
        }

        .x7bg-footer-heading {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 24px;
            color: var(--x7bg-dark);
        }

        .x7bg-footer-links {
            list-style: none;
        }

        .x7bg-footer-links li {
            margin-bottom: 12px;
        }

        .x7bg-footer-links a {
            font-size: 14px;
            color: var(--x7bg-text-light);
        }

        .x7bg-footer-links a:hover {
            color: var(--x7bg-primary);
        }

        .x7bg-copyright {
            padding-top: 32px;
            border-top: 1px solid rgba(0,0,0,0.05);
            text-align: center;
            font-size: 13px;
            color: var(--x7bg-text-light);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .x7bg-hero-bg {
                width: 100%;
                opacity: 0.3;
            }
            .x7bg-hero-card {
                margin: 0 auto;
                text-align: center;
            }
            .x7bg-hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .x7bg-footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .x7bg-nav-wrapper {
                padding: 0 16px;
            }
            .x7bg-menu {
                display: none; /* Mobile menu logic handled via JS usually, here hidden for brevity */
            }
            .x7bg-hero-card {
                padding: 32px;
            }
            .x7bg-section-padding {
                padding: 64px 0;
            }
            .x7bg-feature-block, .x7bg-feature-block:nth-child(even) {
                flex-direction: column;
                gap: 32px;
            }
            .x7bg-news-section {
                padding: 48px 24px;
            }
            .x7bg-footer-grid {
                grid-template-columns: 1fr;
            }
        }