:root {
            --bt74-primary: #4285F4;
            --bt74-red: #EA4335;
            --bt74-yellow: #FBBC05;
            --bt74-green: #34A853;
            --bt74-text: #202124;
            --bt74-text-light: #5f6368;
            --bt74-bg: #ffffff;
            --bt74-bg-alt: #f8f9fa;
            --bt74-glass: rgba(255, 255, 255, 0.8);
            --bt74-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --bt74-radius: 16px;
            --bt74-container: 1400px;
        }

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

        body {
            font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
            color: var(--bt74-text);
            //background-color: var(--bt74-bg);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        h1, h2, h3, h4 {
            line-height: 1.2;
            font-weight: 700;
            white-space: normal;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

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

        /* Fluid Typography */
        .bt74-fluid-h1 { font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem); }
        .bt74-fluid-h2 { font-size: clamp(1.8rem, 3vw + 0.5rem, 3rem); }
        .bt74-fluid-p { font-size: clamp(1rem, 1vw + 0.5rem, 1.25rem); line-height: 1.8; }

        /* Layout Helpers */
        .bt74-container {
            max-width: var(--bt74-container);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        .bt74-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .bt74-flex-item {
            min-width: 0;
        }

        .bt74-section {
            padding: 96px 0;
            position: relative;
        }

        /* Navigation */
        .bt74-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: var(--bt74-glass);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: transform 0.3s ease;
        }

        .bt74-nav-container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 16px 24px;
            max-width: var(--bt74-container);
            margin: 0 auto;
        }

        .bt74-logo {
            width: 40px;
            height: 40px;
            margin-right: 32px;
        }

        .bt74-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
        }

        .bt74-nav-item a {
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.95rem;
            color: var(--bt74-text-light);
            font-weight: 500;
        }

        .bt74-nav-item a:hover {
            background: rgba(66, 133, 244, 0.1);
            color: var(--bt74-primary);
        }

        .bt74-nav-item.active a {
            background: var(--bt74-primary);
            color: white;
        }

        /* Hero Section - Non-linear Fluid Layout */
        .bt74-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            background: radial-gradient(circle at 90% 10%, rgba(66, 133, 244, 0.05) 0%, transparent 40%);
            overflow: hidden;
        }

        .bt74-hero-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 48px;
            align-items: center;
        }

        .bt74-hero-content {
            max-width: 600px;
            word-break: break-word;
        }

        .bt74-hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(52, 168, 83, 0.1);
            color: var(--bt74-green);
            border-radius: 30px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .bt74-hero-title {
            margin-bottom: 24px;
            background: linear-gradient(135deg, #202124 0%, #4285F4 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .bt74-hero-subtitle {
            margin-bottom: 40px;
            color: var(--bt74-text-light);
        }

        .bt74-hero-visual {
            position: relative;
            transform: perspective(1000px) rotateY(-5deg);
            transition: transform 0.5s ease;
        }

        .bt74-hero-visual:hover {
            transform: perspective(1000px) rotateY(0deg);
        }

        .bt74-prism-img {
            border-radius: var(--bt74-radius);
            box-shadow: var(--bt74-shadow);
            border: 8px solid white;
        }

        .bt74-btn {
            display: inline-block;
            padding: 16px 40px;
            background: var(--bt74-primary);
            color: white;
            border-radius: 50px;
            font-weight: 600;
            box-shadow: 0 4px 14px 0 rgba(66, 133, 244, 0.39);
            transition: all 0.3s ease;
        }

        .bt74-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(66, 133, 244, 0.45);
        }

        /* Speed Viz Section */
        .bt74-speed-section {
            background-color: var(--bt74-bg-alt);
        }

        .bt74-split-layout {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
        }

        .bt74-split-img-wrapper {
            flex: 1;
            min-width: 320px;
            position: relative;
        }

        .bt74-speed-viz {
            border-radius: var(--bt74-radius);
            box-shadow: var(--bt74-shadow);
        }

        .bt74-split-text {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
        }

        /* Productivity Grid */
        .bt74-grid-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .bt74-card {
            background: white;
            padding: 40px;
            border-radius: var(--bt74-radius);
            border: 1px solid rgba(0,0,0,0.03);
            transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
            position: relative;
            overflow: hidden;
        }

        .bt74-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--bt74-shadow);
            border-color: var(--bt74-primary);
        }

        .bt74-card-icon {
            font-size: 2.5rem;
            margin-bottom: 24px;
            display: block;
        }

        .bt74-card-title {
            margin-bottom: 16px;
            font-size: 1.5rem;
        }

        .bt74-card-tag {
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--bt74-primary);
            font-weight: 700;
            margin-bottom: 8px;
            display: block;
        }

        /* Sync Ecology */
        .bt74-sync-bg {
            background: linear-gradient(to right, #f8f9fa 0%, #ffffff 100%);
        }

        .bt74-sync-visual {
            margin-top: 64px;
            text-align: center;
        }

        .bt74-sync-img {
            max-width: 1000px;
            margin: 0 auto;
            border-radius: var(--bt74-radius);
        }

        /* Footer */
        .bt74-footer {
            background: #202124;
            color: white;
            padding: 80px 0 40px;
            position: relative;
            overflow: hidden;
        }

        .bt74-footer-wave {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            object-fit: cover;
            opacity: 0.5;
        }

        .bt74-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .bt74-footer-brand h3 {
            font-size: 1.8rem;
            margin-bottom: 16px;
            color: white;
        }

        .bt74-footer-links h4 {
            margin-bottom: 24px;
            color: #9aa0a6;
        }

        .bt74-footer-links ul {
            list-style: none;
        }

        .bt74-footer-links li {
            margin-bottom: 12px;
        }

        .bt74-footer-links a:hover {
            color: var(--bt74-primary);
        }

        .bt74-footer-bottom {
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            color: #9aa0a6;
            font-size: 0.9rem;
        }

        /* Dynamic Section */
        .bt74-news-item {
            padding: 24px;
            border-bottom: 1px solid #eee;
            transition: background 0.3s;
        }
        .bt74-news-item:hover {
            background: #fdfdfd;
        }

        /* Responsive Breakpoints */
        @media (max-width: 992px) {
            .bt74-nav-menu {
                display: none; /* In a real scenario, this would be a hamburger menu */
            }
            .bt74-hero {
                padding-top: 120px;
            }
        }

        @media (max-width: 768px) {
            .bt74-section { padding: 64px 0; }
            .bt74-hero-grid, .bt74-split-layout {
                grid-template-columns: 1fr;
                flex-direction: column;
            }
            .bt74-nav-container { justify-content: center; }
            .bt74-logo { margin-right: 0; }
        }