:root {
            --ac83o-primary: #D32F2F;
            --ac83o-primary-dark: #B71C1C;
            --ac83o-accent: #0052D9;
            --ac83o-bg-light: #F8FAFC;
            --ac83o-text-main: #1E293B;
            --ac83o-text-muted: #64748B;
            --ac83o-white: #FFFFFF;
            --ac83o-glass: rgba(255, 255, 255, 0.85);
            --ac83o-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            --ac83o-container-width: 1300px;
        }

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

        body {
            font-family: "Inter", "Microsoft YaHei", "PingFang SC", sans-serif;
            background-color: var(--ac83o-bg-light);
            color: var(--ac83o-text-main);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* Fluid Typography */
        h1 { font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1.2; font-weight: 800; margin-bottom: 1.5rem; color: #111; }
        h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); line-height: 1.3; font-weight: 700; margin-bottom: 1rem; }
        h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); font-weight: 600; margin-bottom: 0.8rem; }
        p { font-size: clamp(1rem, 1.2vw, 1.125rem); line-height: 1.7; color: var(--ac83o-text-muted); }

        .ac83o-container {
            max-width: var(--ac83o-container-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* Navigation */
        .ac83o-nav-wrapper {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: var(--ac83o-glass);
            backdrop-filter: blur(15px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            box-shadow: var(--ac83o-shadow);
        }

        .ac83o-nav-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
            flex-wrap: wrap;
        }

        .ac83o-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
        }

        .ac83o-logo img {
            height: 36px;
            width: auto;
        }

        .ac83o-menu {
            display: flex;
            list-style: none;
            gap: 24px;
            flex-wrap: wrap;
        }

        .ac83o-menu a {
            text-decoration: none;
            color: var(--ac83o-text-main);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s ease;
            position: relative;
            padding: 8px 0;
        }

        .ac83o-menu a:hover {
            color: var(--ac83o-primary);
        }

        .ac83o-menu a.active {
            color: var(--ac83o-primary);
        }

        .ac83o-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--ac83o-primary);
        }

        /* Hero Section - Layered Design */
        .ac83o-hero {
            padding: 160px 0 96px;
            background: radial-gradient(circle at top right, rgba(211, 47, 47, 0.05), transparent 40%),
                        radial-gradient(circle at bottom left, rgba(0, 82, 217, 0.05), transparent 40%);
            position: relative;
            overflow: hidden;
        }

        .ac83o-hero-grid {
            display: flex;
            align-items: center;
            gap: 64px;
            flex-wrap: wrap;
        }

        .ac83o-hero-content {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
        }

        .ac83o-hero-visual {
            flex: 1.2;
            min-width: 320px;
            position: relative;
        }

        .ac83o-hero-img {
            width: 100%;
            height: auto;
            border-radius: 24px;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
            transition: transform 0.5s ease;
        }

        .ac83o-hero-img:hover {
            transform: scale(1.02);
        }

        .ac83o-btn-group {
            display: flex;
            gap: 16px;
            margin-top: 32px;
            flex-wrap: wrap;
        }

        .ac83o-btn {
            padding: 16px 36px;
            border-radius: 12px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            text-align: center;
            min-width: 180px;
        }

        .ac83o-btn-primary {
            background: var(--ac83o-primary);
            color: var(--ac83o-white);
            box-shadow: 0 10px 20px rgba(211, 47, 47, 0.2);
        }

        .ac83o-btn-primary:hover {
            background: var(--ac83o-primary-dark);
            transform: translateY(-2px);
        }

        /* Download Matrix */
        .ac83o-download-matrix {
            padding: 96px 0;
        }

        .ac83o-grid-layout {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 32px;
        }

        .ac83o-card {
            background: var(--ac83o-white);
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--ac83o-shadow);
            border: 1px solid rgba(0,0,0,0.03);
            display: flex;
            flex-direction: column;
            transition: transform 0.3s ease;
        }

        .ac83o-card:hover {
            transform: translateY(-8px);
        }

        .ac83o-card-img-wrap {
            height: 280px;
            overflow: hidden;
        }

        .ac83o-card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .ac83o-card-body {
            padding: 32px;
            flex-grow: 1;
            word-break: break-word;
        }

        /* Integrated Modules */
        .ac83o-modules-section {
            padding: 96px 0;
            background-color: #f1f5f9;
        }

        .ac83o-module-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
            margin-top: 48px;
        }

        .ac83o-module-item {
            background: var(--ac83o-white);
            padding: 40px;
            border-radius: 20px;
            border-top: 4px solid var(--ac83o-primary);
        }

        .ac83o-innovation-list {
            list-style: none;
            margin: 20px 0;
        }

        .ac83o-innovation-list li {
            position: relative;
            padding-left: 24px;
            margin-bottom: 12px;
            font-size: 0.95rem;
        }

        .ac83o-innovation-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--ac83o-primary);
            font-weight: bold;
        }

        .ac83o-metric-badge {
            display: inline-block;
            background: rgba(211, 47, 47, 0.08);
            color: var(--ac83o-primary);
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 0.85rem;
            font-weight: 600;
        }

        /* Support Flow */
        .ac83o-support-section {
            padding: 96px 0;
        }

        .ac83o-flow-container {
            display: flex;
            gap: 48px;
            align-items: center;
            flex-wrap: wrap;
        }

        .ac83o-flow-steps {
            flex: 1;
            min-width: 320px;
        }

        .ac83o-step-item {
            display: flex;
            gap: 24px;
            margin-bottom: 32px;
            position: relative;
        }

        .ac83o-step-num {
            width: 40px;
            height: 40px;
            background: var(--ac83o-primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-weight: bold;
        }

        /* Footer */
        .ac83o-footer {
            background: #111;
            color: #999;
            padding: 80px 0 40px;
        }

        .ac83o-footer-content {
            display: flex;
            justify-content: space-between;
            border-bottom: 1px solid #333;
            padding-bottom: 48px;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 48px;
        }

        .ac83o-footer-brand {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .ac83o-footer-bottom {
            text-align: center;
            font-size: 0.9rem;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root { --ac83o-container-width: 95vw; }
        }

        @media (max-width: 768px) {
            .ac83o-nav-inner { height: auto; padding: 16px 0; }
            .ac83o-menu { gap: 12px; margin-top: 16px; justify-content: center; width: 100%; }
            .ac83o-hero { padding-top: 120px; text-align: center; }
            .ac83o-btn-group { justify-content: center; }
            .ac83o-grid-layout { grid-template-columns: 1fr; }
            .ac83o-flow-container { flex-direction: column-reverse; }
        }