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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }

        .xiqi-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .xiqi-header {
            background: linear-gradient(135deg, #4285f4 0%, #34a853 100%);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .xiqi-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }

        .xiqi-logo {
            display: flex;
            align-items: center;
            color: white;
            text-decoration: none;
            font-size: 24px;
            font-weight: bold;
        }

        .xiqi-logo img {
            height: 40px;
            margin-right: 10px;
        }

        .xiqi-nav-menu {
            display: flex;
            gap: 30px;
        }

        .xiqi-nav-link {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 8px 16px;
            border-radius: 20px;
        }

        .xiqi-nav-link:hover {
            background-color: rgba(255,255,255,0.2);
            transform: translateY(-2px);
        }

        .xiqi-hero {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 80px 0;
            text-align: center;
        }

        .xiqi-hero-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }

        .xiqi-hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 40px;
            opacity: 0.9;
        }

        .xiqi-cta-button {
            display: inline-block;
            background: linear-gradient(45deg, #ff6b6b, #ee5a24);
            color: white;
            padding: 18px 40px;
            text-decoration: none;
            border-radius: 50px;
            font-size: 1.2rem;
            font-weight: 600;
            transition: all 0.3s ease;
            box-shadow: 0 8px 25px rgba(238, 90, 36, 0.3);
        }

        .xiqi-cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 35px rgba(238, 90, 36, 0.4);
        }

        .xiqi-main {
            padding: 60px 0;
        }

        .xiqi-section {
            margin-bottom: 60px;
        }

        .xiqi-section-title {
            font-size: 2.5rem;
            color: #2c3e50;
            margin-bottom: 30px;
            text-align: center;
            position: relative;
        }

        .xiqi-section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(45deg, #4285f4, #34a853);
            border-radius: 2px;
        }

        .xiqi-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }

        .xiqi-feature-card {
            background: white;
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
            border-left: 5px solid #4285f4;
        }

        .xiqi-feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.15);
        }

        .xiqi-feature-icon {
            font-size: 3rem;
            margin-bottom: 20px;
            color: #4285f4;
        }

        .xiqi-feature-title {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 15px;
            color: #2c3e50;
        }

        .xiqi-feature-desc {
            color: #666;
            line-height: 1.7;
        }

        .xiqi-version-info {
            background: white;
            padding: 40px;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            margin: 40px 0;
        }

        .xiqi-version-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
        }

        .xiqi-version-table th,
        .xiqi-version-table td {
            padding: 15px;
            text-align: left;
            border-bottom: 1px solid #eee;
        }

        .xiqi-version-table th {
            background-color: #f8f9fa;
            font-weight: 600;
            color: #2c3e50;
        }

        .xiqi-download-section {
            background: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
            color: white;
            padding: 60px 0;
            text-align: center;
            border-radius: 20px;
            margin: 40px 0;
        }

        .xiqi-download-title {
            font-size: 2.5rem;
            margin-bottom: 20px;
        }

        .xiqi-download-desc {
            font-size: 1.2rem;
            margin-bottom: 40px;
            opacity: 0.9;
        }

        .xiqi-download-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .xiqi-download-btn {
            display: inline-block;
            background: rgba(255,255,255,0.2);
            color: white;
            padding: 15px 30px;
            text-decoration: none;
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
            border: 2px solid rgba(255,255,255,0.3);
        }

        .xiqi-download-btn:hover {
            background: rgba(255,255,255,0.3);
            transform: translateY(-2px);
        }

        .xiqi-changelog {
            background: white;
            padding: 40px;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }

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

        .xiqi-changelog-item:last-child {
            border-bottom: none;
        }

        .xiqi-changelog-version {
            font-size: 1.3rem;
            font-weight: 600;
            color: #4285f4;
            margin-bottom: 10px;
        }

        .xiqi-changelog-date {
            color: #666;
            font-size: 0.9rem;
            margin-bottom: 15px;
        }

        .xiqi-changelog-features {
            list-style: none;
        }

        .xiqi-changelog-features li {
            padding: 5px 0;
            padding-left: 20px;
            position: relative;
        }

        .xiqi-changelog-features li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: #34a853;
            font-weight: bold;
        }

        .xiqi-footer {
            background: #2c3e50;
            color: white;
            padding: 40px 0;
            text-align: center;
        }

        .xiqi-footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }

        .xiqi-footer-section h3 {
            margin-bottom: 15px;
            color: #4285f4;
        }

        .xiqi-footer-links {
            list-style: none;
        }

        .xiqi-footer-links li {
            margin-bottom: 8px;
        }

        .xiqi-footer-links a {
            color: #bdc3c7;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .xiqi-footer-links a:hover {
            color: white;
        }

        .xiqi-footer-bottom {
            border-top: 1px solid #34495e;
            padding-top: 20px;
            color: #bdc3c7;
        }

        @media (max-width: 768px) {
            .xiqi-nav-menu {
                display: none;
            }

            .xiqi-hero-title {
                font-size: 2.5rem;
            }

            .xiqi-features-grid {
                grid-template-columns: 1fr;
            }

            .xiqi-download-buttons {
                flex-direction: column;
                align-items: center;
            }
        }