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

        body {
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }

        .p2twi-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .p2twi-header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .p2twi-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }

        .p2twi-logo {
            height: 45px;
            width: auto;
        }

        .p2twi-nav-menu {
            display: flex;
            gap: 30px;
            align-items: center;
        }

        .p2twi-nav-link {
            text-decoration: none;
            color: #333;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 25px;
            transition: all 0.3s ease;
            position: relative;
        }

        .p2twi-nav-link:hover {
            color: #667eea;
            background: rgba(102, 126, 234, 0.1);
            transform: translateY(-2px);
        }

        .p2twi-main {
            min-height: calc(100vh - 80px);
            padding: 60px 0;
        }

        .p2twi-hero-section {
            text-align: center;
            margin-bottom: 80px;
        }

        .p2twi-main-title {
            font-size: 3.5rem;
            font-weight: 700;
            color: white;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
            animation: p2twi-fadeInUp 1s ease-out;
        }

        .p2twi-subtitle {
            font-size: 1.3rem;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 40px;
            animation: p2twi-fadeInUp 1s ease-out 0.2s both;
        }

        .p2twi-download-section {
            background: white;
            border-radius: 20px;
            padding: 50px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
            margin-bottom: 60px;
            animation: p2twi-fadeInUp 1s ease-out 0.4s both;
        }

        .p2twi-download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 40px;
            margin-bottom: 50px;
        }

        .p2twi-download-card {
            background: linear-gradient(135deg, #f8f9ff 0%, #e8f0ff 100%);
            border-radius: 15px;
            padding: 30px;
            text-align: center;
            border: 2px solid transparent;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .p2twi-download-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.1), transparent);
            transition: left 0.5s;
        }

        .p2twi-download-card:hover::before {
            left: 100%;
        }

        .p2twi-download-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(102, 126, 234, 0.2);
            border-color: #667eea;
        }

        .p2twi-platform-icon {
            font-size: 3rem;
            margin-bottom: 20px;
            color: #667eea;
        }

        .p2twi-platform-name {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 15px;
            color: #333;
        }

        .p2twi-version-info {
            color: #666;
            margin-bottom: 10px;
            font-size: 0.9rem;
        }

        .p2twi-file-size {
            color: #888;
            font-size: 0.85rem;
            margin-bottom: 25px;
        }

        .p2twi-download-btn {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
            position: relative;
            overflow: hidden;
        }

        .p2twi-download-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s;
        }

        .p2twi-download-btn:hover::before {
            left: 100%;
        }

        .p2twi-download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
        }

        .p2twi-features-section {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            padding: 50px;
            margin-bottom: 60px;
            animation: p2twi-fadeInUp 1s ease-out 0.6s both;
        }

        .p2twi-section-title {
            font-size: 2.5rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 40px;
            color: #333;
            position: relative;
        }

        .p2twi-section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 2px;
        }

        .p2twi-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }

        .p2twi-feature-item {
            text-align: center;
            padding: 30px 20px;
            border-radius: 15px;
            transition: all 0.3s ease;
        }

        .p2twi-feature-item:hover {
            background: rgba(102, 126, 234, 0.05);
            transform: translateY(-5px);
        }

        .p2twi-feature-icon {
            font-size: 2.5rem;
            color: #667eea;
            margin-bottom: 20px;
        }

        .p2twi-feature-title {
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 15px;
            color: #333;
        }

        .p2twi-feature-desc {
            color: #666;
            line-height: 1.6;
        }

        .p2twi-cta-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 20px;
            padding: 60px;
            text-align: center;
            color: white;
            margin-bottom: 60px;
            animation: p2twi-fadeInUp 1s ease-out 0.8s both;
        }

        .p2twi-cta-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .p2twi-cta-desc {
            font-size: 1.2rem;
            margin-bottom: 40px;
            opacity: 0.9;
        }

        .p2twi-cta-btn {
            background: white;
            color: #667eea;
            border: none;
            padding: 20px 40px;
            border-radius: 50px;
            font-size: 1.3rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .p2twi-cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
        }

        .p2twi-footer {
            background: rgba(0, 0, 0, 0.8);
            color: white;
            text-align: center;
            padding: 40px 0;
        }

        .p2twi-footer-content {
            margin-bottom: 20px;
        }

        .p2twi-footer-links {
            display: flex;
            justify-content: center;
            gap: 30px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .p2twi-footer-link {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .p2twi-footer-link:hover {
            color: white;
        }

        .p2twi-copyright {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
        }

        @keyframes p2twi-fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @media (max-width: 768px) {
            .p2twi-main-title {
                font-size: 2.5rem;
            }

            .p2twi-download-section,
            .p2twi-features-section,
            .p2twi-cta-section {
                padding: 30px 20px;
            }

            .p2twi-nav-menu {
                gap: 15px;
            }

            .p2twi-nav-link {
                padding: 6px 12px;
                font-size: 0.9rem;
            }

            .p2twi-footer-links {
                flex-direction: column;
                gap: 15px;
            }
        }

        @media (max-width: 480px) {
            .p2twi-main-title {
                font-size: 2rem;
            }

            .p2twi-download-grid {
                grid-template-columns: 1fr;
            }

            .p2twi-features-grid {
                grid-template-columns: 1fr;
            }
        }