:root {
        --primary-color: #e44d26; /* Cam đậm */
        --secondary-color: #ff7f50; /* San hô */
        --accent-color: #4CAF50; /* Xanh lá cây */
        --dark-background: #1a1a1a;
        --light-text: #ffffff;
        --dark-text: #333333;
        --border-color: #333;
        --soft-grey: #f5f5f5;
        --button-hover: #c23d1d;
    }

    body {
        font-family: 'Arial', sans-serif;
        line-height: 1.6;
        color: var(--dark-text);
        background-color: #f8f8f8;
    }

    .page-app-6789 {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 15px;
        background-color: #ffffff;
        box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    }

    .page-app-6789__hero-section {
        background-color: var(--dark-background);
        color: var(--light-text);
        text-align: center;
        padding: 60px 20px 40px;
        position: relative;
        overflow: hidden;
        border-bottom: 5px solid var(--primary-color);
        padding-top: 10px; /* Adjust for fixed header */
    }

    .page-app-6789__hero-background {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
        opacity: 0.3;
        z-index: 0;
    }

    .page-app-6789__hero-content {
        position: relative;
        z-index: 1;
    }

    .page-app-6789__hero-title {
        font-size: 2.8em;
        margin-bottom: 15px;
        color: var(--primary-color);
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    .page-app-6789__hero-subtitle {
        font-size: 1.4em;
        margin-bottom: 30px;
        max-width: 800px;
        margin-left: auto;
        margin-right: auto;
    }

    .page-app-6789__download-button {
        display: inline-block;
        background-color: var(--primary-color);
        color: var(--light-text);
        padding: 15px 30px;
        border-radius: 8px;
        font-size: 1.2em;
        font-weight: bold;
        text-decoration: none;
        transition: background-color 0.3s ease, transform 0.3s ease;
        border: none;
        cursor: pointer;
    }

    .page-app-6789__download-button:hover {
        background-color: var(--button-hover);
        transform: translateY(-3px);
    }

    .page-app-6789__section {
        padding: 40px 20px;
        margin-bottom: 20px;
        background-color: #ffffff;
        border-radius: 8px;
    }

    .page-app-6789__section--dark {
        background-color: var(--dark-background);
        color: var(--light-text);
    }

    .page-app-6789__section-title {
        font-size: 2.2em;
        color: var(--primary-color);
        text-align: center;
        margin-bottom: 30px;
        position: relative;
    }

    .page-app-6789__section-title--dark {
        color: var(--light-text);
    }

    .page-app-6789__section-title::after {
        content: '';
        display: block;
        width: 60px;
        height: 4px;
        background-color: var(--primary-color);
        margin: 10px auto 0;
        border-radius: 2px;
    }

    .page-app-6789__content-text {
        font-size: 1.1em;
        margin-bottom: 20px;
        text-align: justify;
    }

    .page-app-6789__features-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 30px;
        margin-top: 30px;
    }

    .page-app-6789__feature-item {
        background-color: var(--soft-grey);
        padding: 25px;
        border-radius: 10px;
        text-align: center;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        height: 100%;
        box-sizing: border-box;
    }

    .page-app-6789__feature-item:hover {
        transform: translateY(-5px);
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
    }

    .page-app-6789__feature-icon {
        width: 100px;
        height: 100px;
        margin-bottom: 15px;
        object-fit: contain;
        border-radius: 8px;
        max-width: 100%;
        height: auto;
    }

    .page-app-6789__feature-title {
        font-size: 1.4em;
        color: var(--primary-color);
        margin-bottom: 10px;
    }

    .page-app-6789__feature-description {
        font-size: 1em;
        color: var(--dark-text);
        flex-grow: 1;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }

    .page-app-6789__steps-list {
        list-style: none;
        padding: 0;
        display: grid;
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 30px;
    }

    .page-app-6789__step-item {
        background-color: var(--soft-grey);
        padding: 20px;
        border-radius: 8px;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
        display: flex;
        align-items: flex-start;
        box-sizing: border-box;
    }

    .page-app-6789__step-number {
        background-color: var(--primary-color);
        color: var(--light-text);
        width: 35px;
        height: 35px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2em;
        font-weight: bold;
        margin-right: 15px;
        flex-shrink: 0;
    }

    .page-app-6789__step-content {
        flex-grow: 1;
    }

    .page-app-6789__step-title {
        font-size: 1.3em;
        color: var(--primary-color);
        margin-bottom: 5px;
    }

    .page-app-6789__step-description {
        font-size: 1em;
        color: var(--dark-text);
        word-wrap: break-word;
        overflow-wrap: break-word;
    }

    .page-app-6789__promo-card {
        background-color: var(--secondary-color);
        color: var(--light-text);
        padding: 30px;
        border-radius: 10px;
        text-align: center;
        margin-top: 30px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    }

    .page-app-6789__promo-title {
        font-size: 2em;
        margin-bottom: 15px;
        color: var(--light-text);
    }

    .page-app-6789__promo-description {
        font-size: 1.2em;
        margin-bottom: 25px;
    }

    .page-app-6789__promo-button {
        background-color: var(--accent-color);
        color: var(--light-text);
        padding: 12px 25px;
        border-radius: 6px;
        font-size: 1.1em;
        font-weight: bold;
        text-decoration: none;
        transition: background-color 0.3s ease, transform 0.3s ease;
        border: none;
        cursor: pointer;
    }

    .page-app-6789__promo-button:hover {
        background-color: #3e8e41;
        transform: translateY(-2px);
    }

    .page-app-6789__payment-methods {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
        margin-top: 30px;
    }

    .page-app-6789__payment-item {
        text-align: center;
        background-color: var(--soft-grey);
        padding: 15px;
        border-radius: 8px;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
        min-width: 120px;
        flex: 1 1 auto;
        box-sizing: border-box;
    }

    .page-app-6789__payment-logo {
        max-width: 80px;
        height: auto;
        margin-bottom: 10px;
        max-height: 50px;
        object-fit: contain;
    }

    .page-app-6789__payment-name {
        font-weight: bold;
        color: var(--dark-text);
    }

    .page-app-6789__faq-list {
        list-style: none;
        padding: 0;
        margin-top: 30px;
    }

    .page-app-6789__faq-item {
        background-color: var(--soft-grey);
        margin-bottom: 10px;
        border-radius: 8px;
        overflow: hidden;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    }

    .page-app-6789__faq-question {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 15px 20px;
        background-color: var(--primary-color);
        color: var(--light-text);
        cursor: pointer;
        user-select: none;
        transition: background-color 0.3s ease;
    }

    .page-app-6789__faq-question:hover {
        background-color: var(--button-hover);
    }

    .page-app-6789__faq-question h3 {
        margin: 0;
        font-size: 1.2em;
        pointer-events: none; /* Prevent h3 from blocking click event */
        flex-grow: 1;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }

    .page-app-6789__faq-toggle {
        font-size: 1.8em;
        line-height: 1;
        margin-left: 15px;
        pointer-events: none; /* Prevent toggle icon from blocking click event */
        transition: transform 0.3s ease;
    }

    .page-app-6789__faq-item.active .page-app-6789__faq-toggle {
        transform: rotate(45deg); /* Change + to X or - visual */
    }

    .page-app-6789__faq-answer {
        max-height: 0;
        overflow: hidden;
        padding: 0 15px; /* Initial padding */
        background-color: #fcfcfc;
        color: var(--dark-text);
        transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
        opacity: 0;
    }

    .page-app-6789__faq-item.active .page-app-6789__faq-answer {
        max-height: 2000px !important; /* Sufficiently large to contain content */
        padding: 20px 15px !important; /* Expanded padding */
        opacity: 1;
    }

    .page-app-6789__floating-buttons {
        position: fixed;
        bottom: 20px;
        right: 20px;
        display: flex;
        flex-direction: column;
        gap: 10px;
        z-index: 1000;
    }

    .page-app-6789__floating-button {
        background-color: var(--primary-color);
        color: var(--light-text);
        padding: 12px 20px;
        border-radius: 50px;
        font-size: 1.1em;
        font-weight: bold;
        text-align: center;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
        transition: background-color 0.3s ease, transform 0.3s ease;
        border: none;
        cursor: pointer;
        min-width: 120px;
    }

    .page-app-6789__floating-button:hover {
        background-color: var(--button-hover);
        transform: translateY(-2px);
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
        .page-app-6789 {
            padding: 0;
        }

        .page-app-6789__hero-title {
            font-size: 2em;
        }

        .page-app-6789__hero-subtitle {
            font-size: 1.1em;
        }

        .page-app-6789__download-button {
            padding: 12px 25px;
            font-size: 1em;
        }

        .page-app-6789__section {
            padding: 30px 15px;
        }

        .page-app-6789__section-title {
            font-size: 1.8em;
        }

        .page-app-6789__content-text {
            font-size: 1em;
        }

        .page-app-6789__features-grid {
            grid-template-columns: 1fr;
        }
        
        /* List items mobile responsive */
        .page-app-6789__step-item,
        .page-app-6789__feature-item,
        .page-app-6789__payment-item {
            width: 100% !important;
            max-width: 100% !important;
            box-sizing: border-box !important;
            margin-left: 0 !important;
            margin-right: 0 !important;
            padding: 15px !important;
        }

        .page-app-6789__steps-list,
        .page-app-6789__faq-list,
        .page-app-6789__payment-methods {
            width: 100% !important;
            max-width: 100% !important;
            box-sizing: border-box !important;
            padding: 0 !important;
            margin-left: 0 !important;
            margin-right: 0 !important;
        }

        .page-app-6789__step-description,
        .page-app-6789__feature-description,
        .page-app-6789__faq-answer p {
            word-wrap: break-word !important;
            overflow-wrap: break-word !important;
            word-break: break-word !important;
        }

        .page-app-6789__faq-question {
            padding: 12px 15px;
        }

        .page-app-6789__faq-question h3 {
            font-size: 1.1em;
        }

        .page-app-6789__faq-answer {
            padding: 15px 15px;
        }
        .page-app-6789__faq-item.active .page-app-6789__faq-answer {
            padding: 15px 15px !important;
        }

        .page-app-6789__floating-buttons {
            bottom: 15px;
            right: 15px;
        }

        .page-app-6789__floating-button {
            padding: 10px 15px;
            font-size: 1em;
            min-width: 100px;
        }

        /* Image responsive */
        .page-app-6789 img {
            max-width: 100% !important;
            height: auto !important;
            box-sizing: border-box !important;
        }

        .page-app-6789__hero-background,
        .page-app-6789__feature-icon,
        .page-app-6789__payment-logo {
            max-width: 100% !important;
            height: auto !important;
            box-sizing: border-box !important;
        }
    }

    @media (max-width: 480px) {
        .page-app-6789__hero-section {
            padding: 40px 15px 30px;
        }
        .page-app-6789__hero-title {
            font-size: 1.8em;
        }
        .page-app-6789__hero-subtitle {
            font-size: 1em;
        }
        .page-app-6789__section-title {
            font-size: 1.6em;
        }
        .page-app-6789__promo-title {
            font-size: 1.6em;
        }
        .page-app-6789__promo-description {
            font-size: 1em;
        }
    }