:root {
            --hwo3t-primary: #ff4a1a;
            --hwo3t-primary-dark: #e63e15;
            --hwo3t-secondary: #2c3e50;
            --hwo3t-text: #333333;
            --hwo3t-bg-light: #f8f9fa;
            --hwo3t-white: #ffffff;
            --hwo3t-gap: 8px;
            --hwo3t-radius: 16px;
            --hwo3t-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --hwo3t-max-width: 1400px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--hwo3t-text);
            line-height: 1.7;
            background-color: var(--hwo3t-white);
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* Typography */
        h1, h2, h3 {
            line-height: 1.3;
            white-space: normal;
            font-weight: 700;
        }

        h1 { font-size: clamp(2rem, 5vw + 1rem, 4rem); }
        h2 { font-size: clamp(1.5rem, 3vw + 0.5rem, 2.5rem); }
        h3 { font-size: clamp(1.2rem, 2vw + 0.5rem, 1.8rem); }
        p { 
            font-size: clamp(1rem, 1vw + 0.5rem, 1.15rem);
            word-break: break-word;
            overflow-wrap: break-word;
        }

        /* Layout Helpers */
        .hwo3t-container {
            max-width: var(--hwo3t-max-width);
            margin: 0 auto;
            padding: 0 calc(var(--hwo3t-gap) * 4);
        }

        .hwo3t-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .hwo3t-flex-item {
            min-width: 0;
        }

        /* Navigation */
        .hwo3t-nav-wrapper {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(15px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .hwo3t-nav {
            height: 80px;
            align-items: center;
            justify-content: space-between;
        }

        .hwo3t-logo img {
            height: 40px;
            display: block;
        }

        .hwo3t-menu {
            list-style: none;
            gap: calc(var(--hwo3t-gap) * 3);
        }

        .hwo3t-menu a {
            text-decoration: none;
            color: var(--hwo3t-secondary);
            font-weight: 500;
            font-size: 1rem;
            transition: color 0.3s ease;
            position: relative;
        }

        .hwo3t-menu a:hover, .hwo3t-menu a.active {
            color: var(--hwo3t-primary);
        }

        .hwo3t-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--hwo3t-primary);
        }

        /* Hero Section - Unique Asymmetric Design */
        .hwo3t-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            background: radial-gradient(circle at 90% 10%, #fff5f2 0%, #ffffff 60%);
            position: relative;
        }

        .hwo3t-hero-content {
            width: 100%;
            max-width: 800px;
        }

        .hwo3t-hero-tag {
            display: inline-block;
            background: rgba(255, 74, 26, 0.1);
            color: var(--hwo3t-primary);
            padding: 4px 16px;
            border-radius: 100px;
            font-weight: 600;
            margin-bottom: calc(var(--hwo3t-gap) * 2);
        }

        .hwo3t-hero-title {
            margin-bottom: calc(var(--hwo3t-gap) * 3);
            color: var(--hwo3t-secondary);
        }

        .hwo3t-hero-subtitle {
            margin-bottom: calc(var(--hwo3t-gap) * 6);
            color: #666;
            max-width: 600px;
        }

        .hwo3t-download-group {
            gap: calc(var(--hwo3t-gap) * 2);
            margin-bottom: calc(var(--hwo3t-gap) * 4);
        }

        .hwo3t-btn {
            padding: 16px 32px;
            border-radius: var(--hwo3t-radius);
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            cursor: pointer;
            border: none;
        }

        .hwo3t-btn-primary {
            background: linear-gradient(135deg, var(--hwo3t-primary) 0%, var(--hwo3t-primary-dark) 100%);
            color: var(--hwo3t-white);
            box-shadow: 0 10px 20px rgba(255, 74, 26, 0.2);
        }

        .hwo3t-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(255, 74, 26, 0.3);
        }

        .hwo3t-btn-outline {
            background: transparent;
            color: var(--hwo3t-secondary);
            border: 2px solid #e0e0e0;
        }

        .hwo3t-btn-outline:hover {
            border-color: var(--hwo3t-primary);
            color: var(--hwo3t-primary);
            background: rgba(255, 74, 26, 0.02);
        }

        /* Scenarios Section - Grid Layout */
        .hwo3t-section {
            padding: 96px 0;
        }

        .hwo3t-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .hwo3t-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
            gap: 32px;
        }

        .hwo3t-card {
            background: var(--hwo3t-white);
            padding: 48px;
            border-radius: var(--hwo3t-radius);
            border: 1px solid #f0f0f0;
            transition: all 0.4s ease;
            position: relative;
            overflow: hidden;
        }

        .hwo3t-card:hover {
            border-color: var(--hwo3t-primary);
            box-shadow: var(--hwo3t-shadow);
            transform: translateY(-8px);
        }

        .hwo3t-card-icon {
            font-size: 2.5rem;
            margin-bottom: 24px;
            display: block;
        }

        .hwo3t-card-title {
            margin-bottom: 16px;
            color: var(--hwo3t-secondary);
        }

        .hwo3t-capability-list {
            list-style: none;
            margin-top: 24px;
        }

        .hwo3t-capability-item {
            padding: 8px 0;
            border-bottom: 1px dashed #eee;
            font-size: 0.95rem;
            color: #555;
            display: flex;
            align-items: center;
        }

        .hwo3t-capability-item::before {
            content: "•";
            color: var(--hwo3t-primary);
            font-weight: bold;
            margin-right: 10px;
        }

        /* OS Support Area */
        .hwo3t-os-support {
            background-color: var(--hwo3t-bg-light);
            border-radius: calc(var(--hwo3t-radius) * 2);
            padding: 64px;
            text-align: center;
        }

        .hwo3t-os-list {
            justify-content: center;
            gap: 48px;
            margin-top: 40px;
        }

        .hwo3t-os-item {
            text-align: center;
            opacity: 0.7;
            transition: opacity 0.3s;
        }

        .hwo3t-os-item:hover {
            opacity: 1;
        }

        .hwo3t-os-name {
            display: block;
            margin-top: 12px;
            font-weight: 600;
        }

        /* Footer */
        .hwo3t-footer {
            background: #1a1a1a;
            color: #999;
            padding: 80px 0 40px;
        }

        .hwo3t-footer-top {
            justify-content: space-between;
            margin-bottom: 64px;
            border-bottom: 1px solid #333;
            padding-bottom: 40px;
        }

        .hwo3t-footer-brand {
            font-size: 1.5rem;
            color: var(--hwo3t-white);
            font-weight: 700;
            margin-bottom: 16px;
        }

        .hwo3t-footer-links {
            gap: 48px;
        }

        .hwo3t-footer-column h4 {
            color: var(--hwo3t-white);
            margin-bottom: 24px;
        }

        .hwo3t-footer-column ul {
            list-style: none;
        }

        .hwo3t-footer-column li {
            margin-bottom: 12px;
        }

        .hwo3t-footer-column a {
            color: #999;
            text-decoration: none;
            transition: color 0.3s;
        }

        .hwo3t-footer-column a:hover {
            color: var(--hwo3t-primary);
        }

        .hwo3t-footer-bottom {
            text-align: center;
            font-size: 0.85rem;
        }

        /* Responsive */
        @media (max-width: 992px) {
            .hwo3t-hero-content { text-align: center; margin: 0 auto; }
            .hwo3t-download-group { justify-content: center; }
            .hwo3t-hero-subtitle { margin-left: auto; margin-right: auto; }
        }

        @media (max-width: 768px) {
            .hwo3t-nav { height: auto; padding: 16px 0; flex-direction: column; gap: 16px; }
            .hwo3t-menu { justify-content: center; font-size: 0.9rem; gap: 12px; }
            .hwo3t-grid { grid-template-columns: 1fr; }
            .hwo3t-section { padding: 64px 0; }
            .hwo3t-os-support { padding: 32px; }
            .hwo3t-footer-top { flex-direction: column; gap: 40px; text-align: center; }
            .hwo3t-footer-links { flex-direction: column; gap: 32px; }
        }