body {
            margin: 0;
            padding: 0;
            font-family: Arial, sans-serif;
            background: linear-gradient(0deg, #b62694, #13071d);
            color: white;
            min-height: 100vh;
        }

        .header {
            display: flex;
            justify-content: space-between;
            padding: 20px 50px;
            align-items: center;
        }

        .logo {
            color: #00a8ff;
            font-size: 24px;
            font-weight: bold;
        }

        .join-vip {
            background: transparent;
            border: 2px solid white;
            color: white;
            padding: 10px 20px;
            border-radius: 25px;
            cursor: pointer;
        }

        .main-content {
            text-align: center;
            padding: 50px 20px;
        }

        .title {
            color: #ff6b6b;
            font-size: 100px;
            margin-bottom: 30px;
        }

        .subtitle {
            font-size: 25px;
            margin-bottom: 50px;
            color: #e0e0e0;
            font-weight: normal;
        }

        .download-options {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
            width: 100%;
            max-width: 1200px;
            margin: 50px auto;
            padding: 0 20px;
        }

        .download-button {
            background: white;
            padding: 15px 0;
            border-radius: 25px;
            cursor: pointer;
            transition: transform 0.3s;
            color: #333;
            font-size: 18px;
            font-weight: 500;
            text-align: center;
            width: calc(25% - 15px);
            min-width: 200px;
        }

        .download-button:hover {
            transform: scale(1.02);
        }

        @media screen and (max-width: 768px) {
            .download-button {
                width: 100%;
                min-width: unset;
                font-size: 16px;
                padding: 12px 0;
            }

            .download-options {
                flex-direction: column;
                align-items: center;
                gap: 15px;
                max-width: 400px;
            }
        }

        @media screen and (max-width: 480px) {

            .download-options,
            .action-buttons {
                gap: 12px;
                max-width: 300px;
            }

            .download-button,
            .action-button {
                font-size: 15px;
                padding: 12px 0;
            }
        }

        .section-title {
            font-size: 48px;
            text-align: center;
            margin: 100px 0;
            color: #e0e0e0;
        }

        .wechat-tip {
            position: fixed;
            top: 15px;
            right: 15px;
            background: rgba(0, 0, 0, 0.8);
            color: #fff;
            padding: 10px 15px;
            border-radius: 4px;
            z-index: 9999;
            display: none;
            animation: fadeIn 0.3s ease-in;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
            }

            to {
                opacity: 1;
            }
        }

        /* WhatsApp按钮样式 */
        .whatsapp-link {
            position: fixed;
            left: 20px;
            bottom: 20px;
            background: #25D366;
            /* WhatsApp颜色 */
            color: white;
            padding: 12px 24px;
            border-radius: 50px;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 16px;
            transition: all 0.3s ease;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }

        .whatsapp-link:hover {
            background: #128C7E;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
        }

        .whatsapp-link i {
            font-size: 20px;
        }

        /* 移动端按钮样式 */
        @media screen and (max-width: 768px) {
            .whatsapp-link {
                padding: 10px 20px;
                font-size: 14px;
            }
        }

        /* 移动端小屏幕按钮样式 */
        @media screen and (max-width: 768px) {
            .title {
                font-size: 36px;
                /* 小屏幕 */
            }

            .subtitle {
                font-size: 20px;
                /* 小屏幕 */
            }

            .section-title {
                font-size: 28px;
                /* Why choose us 开始一个美好的体验 小屏幕 */
                margin: 60px 0;
                /* 小屏幕 */
            }
        }

        /* 小屏幕设备按钮样式 */
        @media screen and (max-width: 480px) {
            .title {
                font-size: 32px;
                /* 小屏幕 */
            }

            .subtitle {
                font-size: 18px;
            }

            .section-title {
                font-size: 24px;
                margin: 40px 0;
            }
        }

        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 1000;
            animation: fadeIn 0.3s ease;
        }

        .modal-content {
            position: relative;
            background: white;
            margin: 15% auto;
            padding: 25px;
            width: 90%;
            max-width: 400px;
            border-radius: 15px;
            text-align: center;
            animation: slideIn 0.3s ease;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
        }

        .close-button {
            position: absolute;
            right: 20px;
            top: 15px;
            font-size: 24px;
            cursor: pointer;
            color: #666;
        }

        .close-button:hover {
            color: #333;
        }

        #modalTitle {
            color: #333;
            margin-bottom: 20px;
            font-size: 24px;
        }

        #modalMessage {
            color: #666;
            margin-bottom: 25px;
            font-size: 18px;
        }

        .modal-button {
            background: #00a8ff;
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 25px;
            cursor: pointer;
            font-size: 16px;
            transition: all 0.3s ease;
        }

        .modal-button:hover {
            background: #0097e6;
            transform: translateY(-2px);
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
            }

            to {
                opacity: 1;
            }
        }

        @keyframes slideIn {
            from {
                transform: translateY(-20px);
                opacity: 0;
            }

            to {
                transform: translateY(0);
                opacity: 1;
            }
        }

        /* 移动端按钮样式 */
        @media screen and (max-width: 480px) {
            .modal-content {
                margin: 30% auto;
                width: 85%;
                padding: 20px;
            }

            #modalTitle {
                font-size: 20px;
            }

            #modalMessage {
                font-size: 16px;
            }
        }

        /* 添加统一按钮样式 */
        .action-buttons {
            display: flex;
            justify-content: center;
            gap: 30px;
            width: 100%;
            max-width: 1200px;
            margin: 40px auto;
            padding: 0 20px;
        }

        /* 统一按钮样式 */
        .action-button {
            background: linear-gradient(45deg, #00a8ff, #0097e6);
            color: white;
            padding: 15px 0;
            border-radius: 25px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 18px;
            font-weight: 500;
            box-shadow: 0 4px 15px rgba(0, 168, 255, 0.3);
            text-align: center;
            border: none;
            white-space: nowrap;
            width: 300px;
        }

        .action-button:hover {
            transform: scale(1.02);
            box-shadow: 0 6px 20px rgba(0, 168, 255, 0.4);
        }



        /* 移动端按钮样式 */
        @media screen and (max-width: 768px) {
            .action-buttons {
                flex-direction: column;
                align-items: center;
                gap: 15px;
                max-width: 400px;
            }

            .action-button,
            .dropdown {
                width: 100%;
            }
        }