:root {
        --primary-color: #007bff; /* A vibrant blue */
        --secondary-color: #6c757d; /* A muted grey */
        --accent-color: #28a745; /* A bright green for success/CTA */
        --text-color: #333;
        --light-text-color: #f8f9fa;
        --background-light: #f8f9fa;
        --background-dark: #343a40;
        --border-color: #dee2e6;
        --spacing-unit: 1rem; /* 16px */
    }

    .page-signature-plan-599-smart {
        font-family: 'Arial', sans-serif;
        line-height: 1.6;
        color: var(--text-color);
        background-color: var(--background-light);
    }

    .page-signature-plan-599-smart__container {
        max-width: 1200px;
        margin: 0 auto;
        padding: calc(var(--spacing-unit) * 2);
    }

    .page-signature-plan-599-smart__hero-section {
        background: var(--background-dark);
        color: var(--light-text-color);
        padding: calc(var(--spacing-unit) * 4) calc(var(--spacing-unit) * 2);
        text-align: center;
        position: relative;
        overflow: hidden;
        padding-top: calc(var(--spacing-unit) * 2); /* Small top padding, assuming body handles main offset */
    }

    .page-signature-plan-599-smart__hero-background {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
        z-index: 0;
        opacity: 0.3;
    }

    .page-signature-plan-599-smart__hero-content {
        position: relative;
        z-index: 1;
        max-width: 800px;
        margin: 0 auto;
    }

    .page-signature-plan-599-smart__hero-title {
        font-size: 2.8rem;
        margin-bottom: var(--spacing-unit);
        color: #fff;
        line-height: 1.2;
    }

    .page-signature-plan-599-smart__hero-description {
        font-size: 1.2rem;
        margin-bottom: calc(var(--spacing-unit) * 2);
    }

    .page-signature-plan-599-smart__cta-button {
        display: inline-block;
        background-color: var(--accent-color);
        color: #fff;
        padding: var(--spacing-unit) calc(var(--spacing-unit) * 2);
        border-radius: 5px;
        text-decoration: none;
        font-weight: bold;
        transition: background-color 0.3s ease;
        border: none;
        cursor: pointer;
        font-size: 1rem;
    }

    .page-signature-plan-599-smart__cta-button:hover {
        background-color: #218838;
    }

    .page-signature-plan-599-smart__section {
        padding: calc(var(--spacing-unit) * 3) calc(var(--spacing-unit) * 2);
        background-color: #fff;
        margin-bottom: var(--spacing-unit);
        border-radius: 8px;
        box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    }

    .page-signature-plan-599-smart__section--alt {
        background-color: var(--background-light);
    }

    .page-signature-plan-599-smart__section-title {
        font-size: 2rem;
        color: var(--primary-color);
        text-align: center;
        margin-bottom: calc(var(--spacing-unit) * 2);
    }

    .page-signature-plan-599-smart__features-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: calc(var(--spacing-unit) * 2);
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .page-signature-plan-599-smart__feature-item {
        background-color: #fff;
        border: 1px solid var(--border-color);
        border-radius: 8px;
        padding: calc(var(--spacing-unit) * 1.5);
        text-align: center;
        box-shadow: 0 1px 3px rgba(0,0,0,0.08);
        transition: transform 0.2s ease;
        box-sizing: border-box; /* Crucial for mobile responsiveness */
    }

    .page-signature-plan-599-smart__feature-item:hover {
        transform: translateY(-5px);
    }

    .page-signature-plan-599-smart__feature-icon {
        max-width: 100%;
        height: auto;
        margin-bottom: var(--spacing-unit);
        border-radius: 4px;
        display: block;
        margin-left: auto;
        margin-right: auto;
        overflow: hidden;
    }

    .page-signature-plan-599-smart__feature-title {
        font-size: 1.3rem;
        color: var(--primary-color);
        margin-bottom: var(--spacing-unit);
    }

    .page-signature-plan-599-smart__how-it-works-steps {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: calc(var(--spacing-unit) * 2);
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .page-signature-plan-599-smart__step-item {
        flex: 1 1 300px;
        background-color: #fff;
        border: 1px solid var(--border-color);
        border-radius: 8px;
        padding: calc(var(--spacing-unit) * 1.5);
        text-align: center;
        box-shadow: 0 1px 3px rgba(0,0,0,0.08);
        box-sizing: border-box; /* Crucial for mobile responsiveness */
    }

    .page-signature-plan-599-smart__step-number {
        font-size: 2.5rem;
        color: var(--primary-color);
        font-weight: bold;
        margin-bottom: var(--spacing-unit);
    }

    .page-signature-plan-599-smart__step-title {
        font-size: 1.2rem;
        color: var(--primary-color);
        margin-bottom: var(--spacing-unit);
    }

    .page-signature-plan-599-smart__why-choose-list {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: calc(var(--spacing-unit) * 2);
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .page-signature-plan-599-smart__why-choose-item {
        background-color: #fff;
        border: 1px solid var(--border-color);
        border-radius: 8px;
        padding: calc(var(--spacing-unit) * 1.5);
        box-shadow: 0 1px 3px rgba(0,0,0,0.08);
        box-sizing: border-box; /* Crucial for mobile responsiveness */
    }

    .page-signature-plan-599-smart__why-choose-title {
        font-size: 1.3rem;
        color: var(--primary-color);
        margin-bottom: var(--spacing-unit);
    }

    /* FAQ Section Styles */
    .page-signature-plan-599-smart__faq-section {
        background-color: #fff;
        padding: calc(var(--spacing-unit) * 3) calc(var(--spacing-unit) * 2);
        border-radius: 8px;
        box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    }

    .page-signature-plan-599-smart__faq-list {
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .page-signature-plan-599-smart__faq-item {
        border-bottom: 1px solid var(--border-color);
        margin-bottom: var(--spacing-unit);
        padding-bottom: var(--spacing-unit);
    }

    .page-signature-plan-599-smart__faq-item:last-child {
        border-bottom: none;
        margin-bottom: 0;
        padding-bottom: 0;
    }

    .page-signature-plan-599-smart__faq-question {
        display: flex;
        justify-content: space-between;
        align-items: center;
        cursor: pointer;
        user-select: none;
        padding: var(--spacing-unit) 0;
        font-size: 1.1rem;
        color: var(--primary-color);
        font-weight: bold;
        transition: color 0.3s ease;
    }

    .page-signature-plan-599-smart__faq-question:hover {
        color: var(--accent-color);
    }

    .page-signature-plan-599-smart__faq-question h3 {
        margin: 0;
        font-size: 1.1rem;
        pointer-events: none; /* Prevent h3 from blocking click on parent div */
    }

    .page-signature-plan-599-smart__faq-toggle {
        font-size: 1.5rem;
        font-weight: bold;
        margin-left: var(--spacing-unit);
        pointer-events: none; /* Prevent toggle from blocking click on parent div */
        transition: transform 0.3s ease;
    }

    .page-signature-plan-599-smart__faq-answer {
        max-height: 0;
        overflow: hidden;
        padding: 0 15px; /* Initial padding, will change to 20px 15px on active */
        opacity: 0;
        transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
        color: var(--text-color);
    }

    .page-signature-plan-599-smart__faq-item.active .page-signature-plan-599-smart__faq-answer {
        max-height: 2000px !important; /* Large enough to contain any content */
        padding: 20px 15px !important;
        opacity: 1;
    }

    .page-signature-plan-599-smart__faq-item.active .page-signature-plan-599-smart__faq-toggle {
        transform: rotate(45deg); /* Plus sign rotates to form an X or minus */
    }

    /* Responsive Design */
    @media (max-width: 768px) {
        .page-signature-plan-599-smart__container {
            padding: var(--spacing-unit);
        }

        .page-signature-plan-599-smart__hero-title {
            font-size: 2rem;
        }

        .page-signature-plan-599-smart__hero-description {
            font-size: 1rem;
        }

        .page-signature-plan-599-smart__section-title {
            font-size: 1.7rem;
        }

        .page-signature-plan-599-smart__features-grid,
        .page-signature-plan-599-smart__how-it-works-steps,
        .page-signature-plan-599-smart__why-choose-list {
            grid-template-columns: 1fr;
            gap: var(--spacing-unit);
        }

        /* List item mobile responsiveness */
        .page-signature-plan-599-smart__feature-item,
        .page-signature-plan-599-smart__step-item,
        .page-signature-plan-599-smart__why-choose-item {
            width: 100% !important;
            max-width: 100% !important;
            box-sizing: border-box !important;
            padding: var(--spacing-unit);
            margin-left: 0 !important;
            margin-right: 0 !important;
            word-wrap: break-word !important;
            overflow-wrap: break-word !important;
            word-break: break-word !important;
        }

        .page-signature-plan-599-smart__features-grid,
        .page-signature-plan-599-smart__how-it-works-steps,
        .page-signature-plan-599-smart__why-choose-list,
        .page-signature-plan-599-smart__faq-list {
            width: 100% !important;
            max-width: 100% !important;
            box-sizing: border-box !important;
            padding: 0 !important; /* Adjust as needed, ensure no horizontal scroll */
            margin-left: 0 !important;
            margin-right: 0 !important;
        }

        .page-signature-plan-599-smart__faq-question {
            font-size: 1rem;
            padding: var(--spacing-unit) 0;
        }

        .page-signature-plan-599-smart__faq-question h3 {
            font-size: 1rem;
        }

        .page-signature-plan-599-smart__faq-toggle {
            font-size: 1.2rem;
        }

        .page-signature-plan-599-smart__faq-answer {
            padding: 15px 10px; /* Slightly reduced padding for smaller screens */
        }

        .page-signature-plan-599-smart__faq-item.active .page-signature-plan-599-smart__faq-answer {
            padding: 15px 10px !important;
        }

        /* Image responsiveness for all images */
        .page-signature-plan-599-smart__hero-background,
        .page-signature-plan-599-smart__feature-icon {
            max-width: 100% !important;
            height: auto !important;
            box-sizing: border-box !important;
        }
    }

    @media (max-width: 480px) {
        .page-signature-plan-599-smart__hero-title {
            font-size: 1.8rem;
        }
        .page-signature-plan-599-smart__section-title {
            font-size: 1.5rem;
        }
    }