* {
            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: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
        }

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

        .p2twi-logo {
            display: flex;
            align-items: center;
            font-size: 24px;
            font-weight: bold;
            color: #4a5568;
        }

        .p2twi-logo img {
            height: 40px;
            margin-right: 10px;
        }

        .p2twi-nav-menu {
            display: flex;
            list-style: none;
            gap: 30px;
        }

        .p2twi-nav-link {
            text-decoration: none;
            color: #4a5568;
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 8px 16px;
            border-radius: 25px;
        }

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

        .p2twi-main {
            margin-top: 80px;
            min-height: calc(100vh - 80px);
        }

        .p2twi-hero {
            padding: 80px 0;
            text-align: center;
            color: white;
        }

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

        .p2twi-hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 40px;
            opacity: 0.9;
            animation: p2twi-fadeInUp 1s ease-out 0.2s both;
        }

        .p2twi-hero-cta {
            display: inline-block;
            background: linear-gradient(45deg, #ff6b6b, #ee5a24);
            color: white;
            padding: 18px 40px;
            border-radius: 50px;
            text-decoration: none;
            font-size: 1.2rem;
            font-weight: 600;
            box-shadow: 0 8px 25px rgba(238, 90, 36, 0.4);
            transition: all 0.3s ease;
            animation: p2twi-fadeInUp 1s ease-out 0.4s both;
        }

        .p2twi-hero-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 35px rgba(238, 90, 36, 0.6);
        }

        .p2twi-content {
            background: white;
            padding: 80px 0;
        }

        .p2twi-section {
            margin-bottom: 60px;
        }

        .p2twi-section-title {
            font-size: 2.5rem;
            color: #2d3748;
            margin-bottom: 30px;
            text-align: center;
            position: relative;
        }

        .p2twi-section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(45deg, #667eea, #764ba2);
            border-radius: 2px;
        }

        .p2twi-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 50px;
        }

        .p2twi-feature-card {
            background: white;
            padding: 40px 30px;
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            text-align: center;
            transition: all 0.3s ease;
            border: 1px solid #e2e8f0;
        }

        .p2twi-feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
        }

        .p2twi-feature-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(45deg, #667eea, #764ba2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 2rem;
            color: white;
        }

        .p2twi-feature-title {
            font-size: 1.5rem;
            color: #2d3748;
            margin-bottom: 15px;
            font-weight: 600;
        }

        .p2twi-feature-desc {
            color: #718096;
            line-height: 1.8;
        }

        .p2twi-compatibility {
            background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
            padding: 60px 0;
            margin: 60px 0;
            border-radius: 30px;
        }

        .p2twi-os-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }

        .p2twi-os-card {
            background: white;
            padding: 30px;
            border-radius: 15px;
            text-align: center;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
        }

        .p2twi-os-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
        }

        .p2twi-os-icon {
            font-size: 3rem;
            margin-bottom: 15px;
        }

        .p2twi-os-name {
            font-size: 1.3rem;
            font-weight: 600;
            color: #2d3748;
            margin-bottom: 10px;
        }

        .p2twi-os-version {
            color: #718096;
            font-size: 0.9rem;
        }

        .p2twi-download-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            padding: 80px 0;
            text-align: center;
            color: white;
            border-radius: 30px;
            margin: 60px 0;
        }

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

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

        .p2twi-download-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .p2twi-download-btn {
            display: inline-flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.2);
            color: white;
            padding: 15px 30px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            backdrop-filter: blur(10px);
            border: 2px solid rgba(255, 255, 255, 0.3);
            transition: all 0.3s ease;
        }

        .p2twi-download-btn:hover {
            background: rgba(255, 255, 255, 0.3);
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
        }

        .p2twi-footer {
            background: #2d3748;
            color: white;
            padding: 40px 0;
            text-align: center;
        }

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

        .p2twi-footer-section h3 {
            margin-bottom: 15px;
            color: #e2e8f0;
        }

        .p2twi-footer-section p,
        .p2twi-footer-section a {
            color: #a0aec0;
            text-decoration: none;
            line-height: 1.8;
        }

        .p2twi-footer-section a:hover {
            color: #667eea;
        }

        .p2twi-footer-bottom {
            border-top: 1px solid #4a5568;
            padding-top: 20px;
            color: #a0aec0;
        }

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

        @media (max-width: 768px) {
            .p2twi-nav-menu {
                display: none;
            }

            .p2twi-hero-title {
                font-size: 2.5rem;
            }

            .p2twi-section-title {
                font-size: 2rem;
            }

            .p2twi-download-buttons {
                flex-direction: column;
                align-items: center;
            }
        }