:root {
            --hbosco-primary: #d32f2f;
            --hbosco-primary-dark: #b71c1c;
            --hbosco-secondary: #1a237e;
            --hbosco-bg-light: #fdfdfd;
            --hbosco-bg-gray: #f5f7fa;
            --hbosco-text-main: #2c3e50;
            --hbosco-text-muted: #546e7a;
            --hbosco-white: #ffffff;
            --hbosco-radius: 12px;
            --hbosco-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --hbosco-container: 1320px;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background-color: var(--hbosco-bg-light);
            color: var(--hbosco-text-main);
            line-height: 1.7;
            word-break: keep-all;
            overflow-x: hidden;
        }

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

        p {
            word-break: break-word;
            overflow-wrap: break-word;
            font-size: clamp(1rem, 0.5vw + 0.8rem, 1.125rem);
            color: var(--hbosco-text-muted);
        }

        /* Navigation */
        .hbosco-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 15px rgba(0,0,0,0.05);
        }

        .hbosco-nav-container {
            max-width: var(--hbosco-container);
            margin: 0 auto;
            padding: 0 24px;
            height: 80px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .hbosco-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

        .hbosco-logo img {
            height: 48px;
            width: auto;
            display: block;
        }

        .hbosco-menu {
            display: flex;
            list-style: none;
            gap: 16px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .hbosco-menu-item a {
            text-decoration: none;
            color: var(--hbosco-text-main);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 12px;
            transition: all 0.3s ease;
            border-radius: 6px;
        }

        .hbosco-menu-item a:hover {
            color: var(--hbosco-primary);
            background: rgba(211, 47, 47, 0.05);
        }

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

        /* Hero Section */
        .hbosco-hero {
            padding-top: 140px;
            padding-bottom: 96px;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            position: relative;
            overflow: hidden;
        }

        .hbosco-hero-inner {
            max-width: var(--hbosco-container);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
        }

        .hbosco-hero-content {
            flex: 1;
            min-width: 320px;
        }

        .hbosco-hero-title {
            font-size: clamp(2.5rem, 5vw, 4rem);
            margin-bottom: 24px;
            color: var(--hbosco-secondary);
        }

        .hbosco-hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
            margin-bottom: 48px;
            max-width: 600px;
        }

        .hbosco-download-frame {
            flex: 1;
            min-width: 320px;
            position: relative;
        }

        .hbosco-main-card {
            background: var(--hbosco-white);
            border-radius: 24px;
            padding: 48px;
            box-shadow: 0 30px 60px rgba(0,0,0,0.12);
            position: relative;
            z-index: 2;
        }

        .hbosco-card-bg-img {
            position: absolute;
            top: 20px;
            right: -40px;
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 24px;
            z-index: 1;
            opacity: 0.15;
            pointer-events: none;
        }

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

        .hbosco-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 18px 36px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            cursor: pointer;
            border: none;
        }

        .hbosco-btn-primary {
            background: var(--hbosco-primary);
            color: var(--hbosco-white);
            box-shadow: 0 8px 20px rgba(211, 47, 47, 0.3);
        }

        .hbosco-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.15);
        }

        /* Features Grid */
        .hbosco-section {
            padding: 96px 24px;
            max-width: var(--hbosco-container);
            margin: 0 auto;
        }

        .hbosco-section-title {
            text-align: center;
            margin-bottom: 64px;
        }

        .hbosco-section-title h2 {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

        .hbosco-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

        .hbosco-feature-card {
            background: var(--hbosco-white);
            padding: 40px;
            border-radius: var(--hbosco-radius);
            border: 1px solid #eee;
            transition: all 0.3s ease;
        }

        .hbosco-feature-card:hover {
            border-color: var(--hbosco-primary);
            box-shadow: var(--hbosco-shadow);
        }

        .hbosco-feature-icon {
            width: 60px;
            height: 60px;
            background: rgba(211, 47, 47, 0.08);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            color: var(--hbosco-primary);
            font-size: 24px;
            font-weight: bold;
        }

        /* Sync Protocols */
        .hbosco-protocol-wrapper {
            background: var(--hbosco-bg-gray);
            padding: 80px 0;
            margin: 64px 0;
        }

        .hbosco-protocol-flex {
            max-width: var(--hbosco-container);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }

        .hbosco-protocol-item {
            flex: 1;
            min-width: 300px;
            background: var(--hbosco-white);
            padding: 32px;
            border-radius: 16px;
        }

        .hbosco-tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 16px;
        }

        .hbosco-tag {
            background: #edf2f7;
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 13px;
            color: var(--hbosco-secondary);
        }

        /* Safe Verify Section */
        .hbosco-safe-verify {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            background: var(--hbosco-secondary);
            color: var(--hbosco-white);
            border-radius: 32px;
            overflow: hidden;
            margin-top: 96px;
        }

        .hbosco-safe-image {
            flex: 1;
            min-width: 350px;
            line-height: 0;
        }

        .hbosco-safe-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 400px;
        }

        .hbosco-safe-text {
            flex: 1;
            min-width: 350px;
            padding: 64px;
        }

        .hbosco-safe-text h2 {
            color: #fff;
            margin-bottom: 24px;
        }

        .hbosco-safe-text p {
            color: rgba(255, 255, 255, 0.8);
        }

        /* Matrix Section */
        .hbosco-matrix-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 24px;
            margin-top: 48px;
        }

        .hbosco-matrix-item {
            border-left: 4px solid var(--hbosco-primary);
            padding: 24px;
            background: #fff;
            box-shadow: 0 4px 12px rgba(0,0,0,0.03);
        }

        /* Changelog Area */
        .hbosco-changelog-section {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            align-items: flex-start;
        }

        .hbosco-changelog-content {
            flex: 1;
            min-width: 320px;
        }

        .hbosco-changelog-img {
            flex: 0 0 400px;
            min-width: 300px;
        }

        .hbosco-changelog-img img {
            width: 100%;
            border-radius: 16px;
            box-shadow: var(--hbosco-shadow);
        }

        .hbosco-version-list {
            list-style: none;
        }

        .hbosco-version-item {
            padding: 20px 0;
            border-bottom: 1px solid #eee;
        }

        .hbosco-version-tag {
            font-weight: 700;
            color: var(--hbosco-primary);
            margin-right: 12px;
        }

        /* Footer */
        .hbosco-footer {
            background: #1a1c1e;
            color: #94a3b8;
            padding: 80px 24px 40px;
            margin-top: 120px;
        }

        .hbosco-footer-inner {
            max-width: var(--hbosco-container);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
        }

        .hbosco-footer-brand {
            flex: 1;
            min-width: 280px;
        }

        .hbosco-brand-name {
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 24px;
            display: block;
        }

        .hbosco-footer-links {
            flex: 2;
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            min-width: 300px;
        }

        .hbosco-link-col {
            flex: 1;
            min-width: 140px;
        }

        .hbosco-link-col h4 {
            color: #fff;
            margin-bottom: 20px;
            font-size: 16px;
        }

        .hbosco-link-col ul {
            list-style: none;
        }

        .hbosco-link-col li {
            margin-bottom: 12px;
        }

        .hbosco-link-col a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s;
        }

        .hbosco-link-col a:hover {
            color: var(--hbosco-primary);
        }

        .hbosco-copyright {
            max-width: var(--hbosco-container);
            margin: 64px auto 0;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            font-size: 14px;
        }

        /* Mobile Adjustments */
        @media (max-width: 768px) {
            .hbosco-nav-container {
                height: auto;
                padding: 16px 24px;
            }
            .hbosco-menu {
                margin-top: 16px;
                justify-content: center;
            }
            .hbosco-hero {
                padding-top: 180px;
            }
            .hbosco-safe-text {
                padding: 32px;
            }
            .hbosco-safe-image img {
                min-height: 250px;
            }
            .hbosco-hero-inner {
                text-align: center;
            }
            .hbosco-hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .hbosco-btn-group {
                justify-content: center;
            }
            .hbosco-changelog-img {
                flex: 1;
            }
        }