* {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        :root {
            --content-max-width: 700px;
            --top-offset: 0px;
        }

        body {
            background-color: #f4f4f9;
            overflow-x: hidden;
            padding-top: var(--top-offset);
        }

        .video-background {
            position: absolute;
            top: var(--top-offset);
            left: 0;
            right: 0;
            width: 100%;
            max-width: var(--content-max-width);
            margin: 0 auto;
            height: 45vh;
            z-index: -1;
            overflow: hidden;
        }


        .video-background img {
            width: 100%;
            height: 80%;
            filter: blur(4px);
        }


        header {
            position: absolute;
            top: var(--top-offset);
            left: 0;
            right: 0;
            max-width: var(--content-max-width);
            margin: 0 auto;
            padding: 15px 20px;
            box-sizing: border-box;
            z-index: 10;
        }

        .menu-btn {
            background: rgba(255, 255, 255, 0.8);
            border: 2px solid #666;
            border-radius: 8px;
            padding: 8px 10px;
            cursor: pointer;
            font-size: 20px;
            color: #333;
        }

        /* Main Wrapper */
        .main-container {
            margin-top: 19vh; /* Pushes the white card down to overlay the video */
            background: #ffffff;
            border-top-left-radius: 50% 15%; /* Creates the dramatic curved top shape */
            border-top-right-radius: 50% 15%;
            position: relative;
            max-width: var(--content-max-width);
            margin-left: auto;
            margin-right: auto;
            padding: 0 20px 40px 20px;
            display: flex;
            flex-direction: column;
            align-items: center;
            box-shadow: 0 -10px 20px rgba(0,0,0,0.15);
        }


        .nav-sidebar {
            position: fixed;
            top: 0;
            left: -280px; 
            width: 280px;
            height: 100vh;
            background-color: #ffffff;
            z-index: 999; 
            box-shadow: 4px 0 15px rgba(0, 0, 0, 0.1);
            transition: left 0.3s ease-in-out; 
            display: flex;
            flex-direction: column;
        }

        .nav-sidebar.active {
            left: 0;
        }

        .sidebar-header {
            padding: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid #eee;
        }

        .sidebar-header h3 {
            font-size: 18px;
            color: #333;
            font-weight: bold;
            letter-spacing: 1px;
        }

        .close-btn {
            background: none;
            border: none;
            font-size: 22px;
            color: #666;
            cursor: pointer;
            padding: 5px;
        }

        .sidebar-links {
            list-style: none;
            padding: 20px 0;
        }

        .sidebar-links li {
            width: 100%;
        }

        .sidebar-links li a {
            display: flex;
            align-items: center;
            gap: 15px;
            padding: 15px 25px;
            color: #444;
            text-decoration: none;
            font-size: 16px;
            font-weight: 500;
            transition: background 0.2s ease, color 0.2s ease;
        }

        .sidebar-links li a:hover {
            background-color: #f1eff7;
            color: #29b6f6;
        }

        .sidebar-links li a i {
            font-size: 18px;
            width: 24px; 
            color: #666;
        }
        .sidebar-links li a:hover i {
            color: #29b6f6;
        }

        .sidebar-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            background-color: rgba(0, 0, 0, 0.4);
            z-index: 998;
            opacity: 0;
            pointer-events: none; 
            transition: opacity 0.3s ease-in-out;
        }

        .sidebar-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }

        .logo-container {
            margin-top: -65px; 
            width: 130px;
            height: 130px;
            z-index: 2;
        }

        .logo-container img {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }

        /* Play Now Button Area */
        .play-now-container {
            margin-top: 15px;
            width: 100%;
            max-width: 320px;
            cursor: pointer;
            transition: transform 0.2s ease;
        }

        .play-now-container:hover {
            transform: scale(1.03);
        }

        .play-now-container img {
            width: 100%;
            height: auto;
        }

        /* Chat/Contact Grid */
        .contact-channels {
            display: flex;
            gap: 12px;
            width: 100%;
            max-width: 340px;
            margin-top: 25px;
        }

        .btn-channel {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px;
            border-radius: 14px;
            border: none;
            color: white;
            font-weight: bold;
            font-size: 18px;
            text-decoration: none;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        }

        .btn-telegram { background-color: #29b6f6; }
        .btn-whatsapp { background-color: #25d366; }

        .download-slider {
            display: flex;
            gap: 15px;
            width: calc(100% + 40px);
            max-width: none;         
            margin-left: -20px;       
            margin-right: -20px;      
            margin-top: 30px;
            padding: 10px 20px;       
            overflow-x: auto;
            scrollbar-width: none;    
            -webkit-overflow-scrolling: touch; 
        }

        .download-slider::-webkit-scrollbar {
            display: none;           
        }

        .card {
            min-width: 332px;
            border-radius: 16px;
            padding: 20px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .card-android {
            background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
            border: 1px solid #a5d6a7;
        }

        .card-ios {
            background: linear-gradient(135deg, #ffebee 0%, #ffcdd2 100%);
            border: 1px solid #ef9a9a;
        }

        .card h4 {
            font-size: 14px;
            margin-bottom: 4px;
        }
        .card-android h4 { color: #2e7d32; }
        .card-ios h4 { color: #c62828; }

        .card p {
            font-size: 12px;
            color: #666;
            margin-bottom: 20px;
        }

        .btn-download {
            width: 100%;
            padding: 10px;
            border-radius: 20px;
            border: none;
            color: white;
            font-weight: bold;
            font-size: 13px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            text-decoration: none;
            box-shadow: 0 3px 6px rgba(0,0,0,0.1);
        }
        .btn-download-android { background-color: #00c853; }
        .btn-download-ios { background-color: #ff1744; }

     
        .test-id-box {
            background-color: #e0eceb;
            border-radius: 12px;
            width: 100%;
            max-width: 383px;
            padding: 15px;
            text-align: center;
            margin-top: 25px;
            font-size: 13px;
            color: #333;
            border: 1px solid #cbdad8;
        }

        .test-id-box strong {
            display: block;
            margin-bottom: 4px;
            font-size: 14px;
        }


        .info-section {
            width: 100%;
            display: flex;
            justify-content: center;
        }

        .info-content {
            background: #ffffff;
            padding: 28px 22px;
            width: 100%;
            max-width: var(--content-max-width);
            box-shadow: 0 2px 10px rgba(0,0,0,0.06);
        }

        .info-content h1 {
            font-size: 20px;
            color: #111;
            line-height: 1.4;
            margin-bottom: 14px;
            padding-bottom: 14px;
            border-bottom: 2px solid #f1eff7;
        }

        .info-content h2 {
            font-size: 17px;
            margin-top: 26px;
            margin-bottom: 10px;
        }

        .line{
            border-bottom: 2px solid #f1eff7;
        }

        .info-content h3 {
            font-size: 14.5px;
            color: #111;
            margin-top: 18px;
            margin-bottom: 6px;
        }

        .info-content p {
            font-size: 13px;
            color: #555;
            line-height: 1.7;
            margin-bottom: 10px;
        }

        .info-content h1 + p,
        .info-content h2 + p,
        .info-content h3 + p {
            margin-top: 0;
        }

        .info-content p:last-child {
            margin-bottom: 0;
        }

        /* SEO 列表样式 */
        .info-content ul.info-list {
            list-style: none;
            padding-left: 0;
            margin-bottom: 14px;
        }

        .info-content ul.info-list li {
            position: relative;
            padding-left: 18px;
            font-size: 13px;
            color: #555;
            line-height: 1.7;
            margin-bottom: 6px;
        }

        .info-content ul.info-list li::before {
            content: "▸";
            position: absolute;
            left: 0;
            top: 1px;
            font-size: 12px;
            color: #29b6f6;
        }


        .info-content .numbered-item {
            margin-bottom: 14px;
        }

        .info-content .numbered-item h4 {
            font-size: 13.5px;
            color: #111;
            margin-bottom: 4px;
        }


        .info-content ol.info-steps {
            padding-left: 20px;
            margin-bottom: 14px;
        }

        .info-content ol.info-steps li {
            font-size: 13px;
            color: #555;
            line-height: 1.7;
            margin-bottom: 6px;
        }

        .info-content ol.info-steps li::marker {
            color: #29b6f6;
            font-weight: 700;
        }


        .info-content .faq-item {
            padding: 14px 0;
            border-bottom: 1px solid #f1eff7;
        }

        .info-content .faq-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .info-content .faq-item h3 {
            margin-top: 0;
        }

        .info-content .faq-item p {
            margin-bottom: 0;
        }

        .info-content .numbered-item p {
            margin-bottom: 0;
        }


        .info-content .table-wrap {
            width: 100%;
            overflow-x: auto;
            margin: 14px 0 18px;
            border-radius: 12px;
            border: 1px solid #eee;
            -webkit-overflow-scrolling: touch;
        }

        .info-content table {
            width: 100%;
            min-width: 420px;
            border-collapse: collapse;
        }

        .info-content thead th {
            background-color: #29b6f6;
            color: #ffffff;
            font-size: 12.5px;
            text-align: left;
            padding: 10px 12px;
            white-space: nowrap;
        }

        .info-content tbody td {
            font-size: 12.5px;
            color: #444;
            padding: 10px 12px;
            border-bottom: 1px solid #f1eff7;
        }

        .info-content tbody tr:last-child td {
            border-bottom: none;
        }

        .info-content tbody tr:nth-child(even) {
            background-color: #fafafd;
        }

        .text-green {
            color: #2e7d32;
            font-weight: 600;
        }


        @media (min-width: 768px) {
            :root {
                --content-max-width: 700px;
                --top-offset: 60px;
            }

            .info-content {
                padding: 40px 50px;
            }

            .info-content h1 {
                font-size: 24px;
            }

            .info-content h2 {
                font-size: 19px;
            }

            .info-content h3 {
                font-size: 16px;
            }

            .info-content p {
                font-size: 14px;
            }

            .info-content ul.info-list li,
            .info-content ol.info-steps li {
                font-size: 14px;
            }

            .info-content .numbered-item h4 {
                font-size: 15px;
            }

            .info-content thead th,
            .info-content tbody td {
                font-size: 13.5px;
                padding: 12px 16px;
            }

            .info-content .faq-item h3 {
                font-size: 16px;
            }
        }

@media (min-width: 768px) {
    .card {
        align-items: center;
        text-align: center; 
    }
    .btn-download {
        width: auto;         
        min-width: 200px;   
        margin: 0 auto;      
    }
}



@media (min-width: 768px) {
    .download-slider {
        width: 100%;           
        max-width: 700px;      
        margin-left: 0;        
        margin-right: 0;       
        justify-content: center; 
        overflow-x: visible;   
    }

    .card {
        flex: 1;              
        max-width: 332px;    
    }
}


.site-footer {
    width: 100%;
    text-align: center;
    padding: 20px 0 30px 0; 
    background-color: #f1eff7; 
}

.site-footer p {
    font-size: 13px;
    color: #777;
    margin: 0;
}

.back-to-top {
    position: fixed;
    right: 20px;
    bottom: 20px;
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 50%;
    background-color: #29b6f6;
    color: #ffffff;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
    z-index: 500;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: #1e9fdb;
}