:root {
            --w87eju-primary: #ff4d2d;
            --w87eju-primary-hover: #e64528;
            --w87eju-bg: #f8f9fb;
            --w87eju-text-main: #1d1d1f;
            --w87eju-text-sub: #86868b;
            --w87eju-white: #ffffff;
            --w87eju-glass: rgba(255, 255, 255, 0.8);
            --w87eju-radius: 18px;
            --w87eju-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }

        * {
            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(--w87eju-bg);
            color: var(--w87eju-text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Layout Rules */
        .w87eju-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        .w87eju-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .w87eju-flex > * {
            min-width: 0;
        }

        .w87eju-text-container {
            word-break: break-word;
            overflow-wrap: break-word;
        }

        .w87eju-zh-text {
            word-break: keep-all;
            line-height: 1.8;
        }

        /* Navigation */
        .w87eju-header {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: var(--w87eju-glass);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .w87eju-nav {
            height: 72px;
            align-items: center;
            justify-content: space-between;
        }

        .w87eju-logo {
            display: flex;
            align-items: center;
        }

        .w87eju-logo img {
            height: 32px;
            width: auto;
        }

        .w87eju-menu {
            list-style: none;
            gap: 24px;
            align-items: center;
        }

        .w87eju-menu li a {
            text-decoration: none;
            color: var(--w87eju-text-main);
            font-size: 15px;
            font-weight: 500;
            transition: color 0.3s;
        }

        .w87eju-menu li a:hover {
            color: var(--w87eju-primary);
        }

        .w87eju-menu li a.w87eju-active {
            color: var(--w87eju-primary);
            position: relative;
        }

        .w87eju-menu li a.w87eju-active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 4px;
            height: 4px;
            background: var(--w87eju-primary);
            border-radius: 50%;
        }

        /* Hero Section */
        .w87eju-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            background: radial-gradient(circle at 90% 10%, rgba(255, 77, 45, 0.05) 0%, transparent 40%);
            text-align: center;
        }

        .w87eju-hero-card {
            background: var(--w87eju-white);
            border-radius: 40px;
            padding: 64px 32px;
            box-shadow: var(--w87eju-shadow);
            max-width: 1100px;
            margin: 0 auto;
            position: relative;
            overflow: hidden;
        }

        .w87eju-hero-title {
            font-size: clamp(2rem, 5vw, 3.5rem);
            font-weight: 800;
            color: var(--w87eju-text-main);
            margin-bottom: 24px;
            letter-spacing: -1px;
            white-space: normal;
        }

        .w87eju-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--w87eju-text-sub);
            max-width: 700px;
            margin: 0 auto 48px;
        }

        .w87eju-cta-group {
            justify-content: center;
            gap: 24px;
        }

        .w87eju-btn {
            padding: 16px 40px;
            border-radius: 50px;
            font-size: 18px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .w87eju-btn-primary {
            background: var(--w87eju-primary);
            color: var(--w87eju-white);
            box-shadow: 0 10px 20px rgba(255, 77, 45, 0.2);
        }

        .w87eju-btn-primary:hover {
            background: var(--w87eju-primary-hover);
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(255, 77, 45, 0.3);
        }

        .w87eju-btn-secondary {
            background: #f2f2f7;
            color: var(--w87eju-text-main);
        }

        .w87eju-btn-secondary:hover {
            background: #e5e5ea;
            transform: translateY(-3px);
        }

        /* Feature Matrix */
        .w87eju-matrix {
            padding: 96px 0;
            background: #ffffff;
        }

        .w87eju-section-tag {
            display: block;
            text-align: center;
            color: var(--w87eju-primary);
            font-weight: 700;
            text-transform: uppercase;
            margin-bottom: 16px;
            letter-spacing: 2px;
        }

        .w87eju-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            margin-top: 64px;
        }

        .w87eju-matrix-card {
            background: var(--w87eju-bg);
            padding: 48px;
            border-radius: 32px;
            transition: all 0.4s ease;
            border: 1px solid transparent;
        }

        .w87eju-matrix-card:hover {
            background: var(--w87eju-white);
            border-color: rgba(255, 77, 45, 0.1);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            transform: translateY(-8px);
        }

        .w87eju-matrix-name {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--w87eju-text-main);
        }

        .w87eju-capacity-list {
            list-style: none;
            margin-bottom: 24px;
        }

        .w87eju-capacity-list li {
            padding: 8px 0;
            color: var(--w87eju-text-sub);
            position: relative;
            padding-left: 24px;
        }

        .w87eju-capacity-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--w87eju-primary);
            font-weight: bold;
        }

        .w87eju-usecase {
            font-size: 14px;
            color: var(--w87eju-primary);
            background: rgba(255, 77, 45, 0.05);
            padding: 12px 20px;
            border-radius: 12px;
            display: inline-block;
        }

        /* Download Detailed Section */
        .w87eju-download-detail {
            padding: 96px 0;
            background: #000;
            color: #fff;
        }

        .w87eju-split {
            align-items: center;
            gap: 64px;
        }

        .w87eju-split-content {
            flex: 1;
        }

        .w87eju-split-image {
            flex: 1;
            background: linear-gradient(135deg, #1d1d1f 0%, #3a3a3c 100%);
            border-radius: 40px;
            height: 500px;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        /* Floating Shapes for visual interest without emojis */
        .w87eju-shape {
            position: absolute;
            background: var(--w87eju-primary);
            border-radius: 50%;
            filter: blur(60px);
            opacity: 0.3;
        }

        /* Footer */
        .w87eju-footer {
            background: #f2f2f7;
            padding: 80px 0 40px;
            border-top: 1px solid rgba(0,0,0,0.05);
        }

        .w87eju-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 64px;
        }

        .w87eju-footer-brand h3 {
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 20px;
            color: var(--w87eju-text-main);
        }

        .w87eju-footer-links h4 {
            font-size: 16px;
            margin-bottom: 24px;
            color: var(--w87eju-text-main);
        }

        .w87eju-footer-links ul {
            list-style: none;
        }

        .w87eju-footer-links li {
            margin-bottom: 12px;
        }

        .w87eju-footer-links a {
            text-decoration: none;
            color: var(--w87eju-text-sub);
            transition: color 0.3s;
        }

        .w87eju-footer-links a:hover {
            color: var(--w87eju-primary);
        }

        .w87eju-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(0,0,0,0.1);
            color: var(--w87eju-text-sub);
            font-size: 14px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .w87eju-footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .w87eju-menu {
                display: none; /* Mobile menu could be hidden or a hamburger in a real project */
            }

            .w87eju-hero {
                padding-top: 120px;
            }

            .w87eju-hero-card {
                padding: 40px 20px;
                border-radius: 24px;
            }

            .w87eju-grid {
                grid-template-columns: 1fr;
            }

            .w87eju-split {
                flex-direction: column;
            }

            .w87eju-footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }