:root {
            --w87eju-primary: #FF6600;
            --w87eju-primary-dark: #E65C00;
            --w87eju-secondary: #2B303B;
            --w87eju-text-main: #1D1D1F;
            --w87eju-text-sub: #6E6E73;
            --w87eju-bg-light: #F5F5F7;
            --w87eju-white: #FFFFFF;
            --w87eju-glass: rgba(255, 255, 255, 0.8);
            --w87eju-radius: 16px;
            --w87eju-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --w87eju-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            -webkit-tap-highlight-color: transparent;
        }

        body {
            font-family: "SF Pro SC", "SF Pro Text", "SF Pro Display", "PingFang SC", "Helvetica Neue", Helvetica, Arial, sans-serif;
            background-color: var(--w87eju-bg-light);
            color: var(--w87eju-text-main);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--w87eju-transition);
        }

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

        /* Navigation */
        .w87eju-header {
            position: fixed;
            top: 0;
            left: 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);
        }

        .w87eju-nav-wrapper {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            height: 72px;
            min-width: 0;
        }

        .w87eju-logo {
            flex-shrink: 0;
            height: 32px;
            min-width: 0;
        }

        .w87eju-logo img {
            height: 100%;
            display: block;
        }

        .w87eju-menu {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            list-style: none;
            min-width: 0;
        }

        .w87eju-menu-item a {
            font-size: 15px;
            font-weight: 500;
            color: var(--w87eju-text-main);
            padding: 8px 0;
            position: relative;
        }

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

        .w87eju-menu-item a.active {
            color: var(--w87eju-primary);
        }

        .w87eju-menu-item a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--w87eju-primary);
            border-radius: 2px;
        }

        /* Hero Section */
        .w87eju-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            background: linear-gradient(180deg, #FFFFFF 0%, #F5F5F7 100%);
            text-align: center;
            overflow: hidden;
        }

        .w87eju-hero-content {
            max-width: 900px;
            margin: 0 auto;
            word-break: break-word;
        }

        .w87eju-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            font-weight: 700;
            line-height: 1.1;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #1d1d1f 0%, #434343 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .w87eju-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.5rem);
            color: var(--w87eju-text-sub);
            max-width: 700px;
            margin: 0 auto 48px;
            line-height: 1.5;
        }

        .w87eju-cta-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
            min-width: 0;
        }

        .w87eju-btn-primary {
            background: var(--w87eju-primary);
            color: var(--w87eju-white);
            padding: 18px 48px;
            border-radius: 40px;
            font-size: 18px;
            font-weight: 600;
            box-shadow: 0 8px 24px rgba(255, 102, 0, 0.3);
        }

        .w87eju-btn-primary:hover {
            background: var(--w87eju-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(255, 102, 0, 0.4);
        }

        /* Productivity Matrix Section */
        .w87eju-section {
            padding: 96px 0;
        }

        .w87eju-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .w87eju-section-label {
            color: var(--w87eju-primary);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            display: block;
            margin-bottom: 16px;
        }

        .w87eju-section-title {
            font-size: clamp(2rem, 3vw + 1rem, 3rem);
            font-weight: 700;
        }

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

        .w87eju-card {
            background: var(--w87eju-white);
            border-radius: var(--w87eju-radius);
            padding: 48px;
            transition: var(--w87eju-transition);
            border: 1px solid rgba(0,0,0,0.03);
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .w87eju-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--w87eju-shadow);
        }

        .w87eju-card-icon {
            width: 64px;
            height: 64px;
            background: #FFF0E6;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 32px;
            color: var(--w87eju-primary);
            font-size: 24px;
            font-weight: bold;
        }

        .w87eju-card-name {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .w87eju-capacity-list {
            list-style: none;
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .w87eju-capacity-item {
            font-size: 16px;
            color: var(--w87eju-text-sub);
            margin-bottom: 12px;
            padding-left: 24px;
            position: relative;
        }

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

        .w87eju-usecase {
            font-size: 14px;
            background: var(--w87eju-bg-light);
            padding: 12px 16px;
            border-radius: 8px;
            color: var(--w87eju-text-sub);
            border-left: 4px solid var(--w87eju-primary);
        }

        /* Feature Highlight: Mobile App Visual */
        .w87eju-visual-section {
            background-color: var(--w87eju-secondary);
            color: var(--w87eju-white);
            border-radius: 40px;
            margin: 64px 24px;
            padding: 96px 64px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            overflow: hidden;
        }

        .w87eju-visual-text {
            flex: 1;
            min-width: 300px;
        }

        .w87eju-visual-text h2 {
            font-size: clamp(2rem, 3vw + 1rem, 3.5rem);
            margin-bottom: 24px;
            line-height: 1.2;
        }

        .w87eju-visual-text p {
            font-size: 18px;
            opacity: 0.8;
            margin-bottom: 40px;
        }

        .w87eju-phone-mockup {
            flex: 1;
            min-width: 300px;
            display: flex;
            justify-content: center;
            position: relative;
        }

        .w87eju-phone-frame {
            width: 280px;
            height: 560px;
            border: 12px solid #333;
            border-radius: 40px;
            background: #000;
            position: relative;
            box-shadow: 0 50px 100px rgba(0,0,0,0.5);
            overflow: hidden;
        }

        .w87eju-phone-screen {
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, #FF6600, #FF9933);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 20px;
        }

        .w87eju-keyboard-mimic {
            background: rgba(255,255,255,0.2);
            backdrop-filter: blur(10px);
            height: 200px;
            border-radius: 12px;
            width: 100%;
        }

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

        .w87eju-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .w87eju-footer-brand h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--w87eju-primary);
        }

        .w87eju-footer-brand p {
            color: var(--w87eju-text-sub);
            font-size: 14px;
        }

        .w87eju-footer-links h4 {
            font-size: 16px;
            margin-bottom: 24px;
        }

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

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

        .w87eju-footer-links a {
            color: var(--w87eju-text-sub);
            font-size: 14px;
        }

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

        .w87eju-copyright {
            padding-top: 32px;
            border-top: 1px solid rgba(0,0,0,0.05);
            text-align: center;
            color: var(--w87eju-text-sub);
            font-size: 13px;
        }

        /* Responsive Breakpoints */
        @media (max-width: 1024px) {
            .w87eju-visual-section {
                padding: 64px 32px;
            }
        }

        @media (max-width: 768px) {
            .w87eju-nav-wrapper {
                height: auto;
                padding: 16px 0;
            }
            .w87eju-menu {
                display: none; /* Mobile menu logic typically uses a hamburger, simplified here for layout */
            }
            .w87eju-hero {
                padding-top: 120px;
            }
            .w87eju-grid {
                grid-template-columns: 1fr;
            }
            .w87eju-visual-section {
                margin: 32px 12px;
                padding: 48px 24px;
            }
        }