/* Base styles for the download page */
.page-download {
    font-family: 'Arial', sans-serif;
    color: #333333; /* Dark text on default light body background */
    line-height: 1.6;
    background-color: #ffffff; /* Explicitly setting for clarity, though body is default white */
}

/* Hero Section */
.page-download__hero-section {
    display: flex;
    flex-direction: column; /* Ensure image is above content */
    align-items: center;
    text-align: center;
    padding: 10px 20px 40px; /* Small top padding, not --header-offset */
    background: linear-gradient(135deg, #017439, #005f2f); /* Brand green gradient */
    color: #ffffff;
    position: relative;
    overflow: hidden;
}

.page-download__hero-image {
    width: 100%;
    max-width: 100%;
    margin-bottom: 30px;
    box-sizing: border-box;
}

.page-download__hero-image img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover; /* Default cover for desktop */
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    aspect-ratio: 16/9; /* Maintain aspect ratio */
}

.page-download__hero-content {
    max-width: 900px;
    margin: 0 auto;
    z-index: 1;
}

.page-download__main-title {
    font-size: clamp(2.5rem, 4vw, 3.5rem); /* Clamp for H1 */
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
    color: #ffffff;
}

.page-download__hero-description {
    font-size: 1.15rem;
    margin-bottom: 30px;
    color: #f0f0f0;
}

.page-download__cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap; /* Allow wrapping on smaller screens */
    width: 100%;
    max-width: 600px; /* Constrain button group width */
    margin: 0 auto;
    box-sizing: border-box;
    padding: 0 15px; /* Add padding to prevent overflow */
}

.page-download__btn-primary,
.page-download__btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 15px 30px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    white-space: normal; /* Allow text wrapping */
    word-wrap: break-word; /* Allow text wrapping */
    box-sizing: border-box;
    max-width: 100%; /* Ensure buttons don't overflow */
    text-align: center;
}

.page-download__btn-primary {
    background-color: #C30808; /* Custom color for register/login buttons as per prompt */
    color: #FFFF00; /* Custom color for register/login text */
    border: 2px solid #C30808;
    box-shadow: 0 4px 15px rgba(195, 8, 8, 0.4);
}

.page-download__btn-primary:hover {
    background-color: #d81c1c;
    border-color: #d81c1c;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(195, 8, 8, 0.6);
}

.page-download__btn-secondary {
    background-color: transparent;
    color: #ffffff;
    border: 2px solid #ffffff;
}

.page-download__btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* General Section Styling */
.page-download__section-title {
    font-size: clamp(2rem, 3.5vw, 2.8rem); /* Clamp for H2 */
    font-weight: 700;
    margin-bottom: 20px;
    text-align: center;
    color: #017439; /* Brand primary color */
    line-height: 1.3;
}

.page-download__section-description {
    font-size: 1.05rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px;
    color: #555555;
}

.page-download__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    box-sizing: border-box;
}

/* Benefits Section */
.page-download__benefits-section {
    padding: 60px 0;
    background-color: #017439; /* Dark section background */
    color: #ffffff;
}

.page-download__benefits-section .page-download__section-title {
    color: #ffffff;
}

.page-download__benefits-section .page-download__section-description {
    color: #f0f0f0;
}

.page-download__benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-download__benefit-card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.page-download__benefit-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.page-download__benefit-card img {
    width: 200px; /* Explicitly set to ensure min size */
    height: 200px; /* Explicitly set to ensure min size */
    min-width: 200px;
    min-height: 200px;
    max-width: 100%;
    object-fit: contain;
    border-radius: 8px;
    margin-bottom: 20px;
}

.page-download__benefit-card .page-download__card-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #ffffff;
}

.page-download__benefit-card .page-download__card-text {
    font-size: 0.95rem;
    color: #e0e0e0;
}

/* Guide Section */
.page-download__guide-section {
    padding: 60px 0;
    background-color: #f9f9f9;
}

.page-download__guide-steps {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

.page-download__guide-card {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    padding: 30px;
    display: flex;
    flex-direction: column;
}

.page-download__guide-card .page-download__card-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 25px;
    color: #017439;
    text-align: center;
}

.page-download__guide-content {
    display: flex;
    gap: 30px;
    align-items: flex-start;
}

.page-download__guide-content img {
    width: 200px; /* Explicitly set to ensure min size */
    height: 200px; /* Explicitly set to ensure min size */
    min-width: 200px;
    min-height: 200px;
    max-width: 300px; /* Adjusted for guide section */
    object-fit: contain;
    border-radius: 8px;
    flex-shrink: 0;
}

.page-download__guide-content ol {
    list-style: decimal;
    padding-left: 20px;
    margin: 0;
    flex-grow: 1;
}

.page-download__guide-content ol li {
    margin-bottom: 15px;
    font-size: 1.05rem;
    color: #444;
}

.page-download__guide-content ol li strong {
    color: #017439;
}

/* Security Section */
.page-download__security-section {
    padding: 60px 0;
    background-color: #e8f5e9; /* Light green background */
}

.page-download__security-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    list-style: none;
    padding: 0;
    margin-top: 40px;
}

.page-download__security-features li {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.05);
    padding: 30px;
    text-align: left;
    display: flex;
    flex-direction: column;
}

.page-download__feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #017439;
}

/* FAQ Section */
.page-download__faq-section {
    padding: 60px 0;
    background-color: #ffffff;
}

.page-download__faq-list {
    max-width: 900px;
    margin: 40px auto 0;
}

details.page-download__faq-item {
    margin-bottom: 15px;
    border-radius: 8px; /* Slightly larger border-radius */
    border: 1px solid #e0e0e0;
    overflow: hidden;
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05); /* Subtle shadow */
}
details.page-download__faq-item summary.page-download__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 25px; /* Increased padding */
    cursor: pointer;
    user-select: none;
    list-style: none;
    transition: background-color 0.3s ease;
    font-size: 1.1rem; /* Slightly larger font */
    font-weight: 600;
    color: #333333; /* Darker question text */
}
details.page-download__faq-item summary.page-download__faq-question::-webkit-details-marker {
    display: none;
}
details.page-download__faq-item summary.page-download__faq-question:hover {
    background: #f0f8f0; /* Light green hover */
}
.page-download__faq-qtext {
    flex: 1;
    font-size: 1.1rem; /* Matched with summary font size */
    font-weight: 600;
    line-height: 1.5;
    text-align: left;
    color: #333333;
}
.page-download__faq-toggle {
    font-size: 28px; /* Larger toggle icon */
    font-weight: bold;
    color: #017439; /* Brand color for toggle */
    flex-shrink: 0;
    margin-left: 15px;
    width: 30px; /* Larger toggle area */
    text-align: center;
}
details.page-download__faq-item .page-download__faq-answer {
    padding: 0 25px 25px;
    background: #fcfcfc;
    border-radius: 0 0 8px 8px;
    font-size: 1rem;
    line-height: 1.7;
    color: #555555;
}
.page-download__faq-answer p {
    margin: 0;
}
.page-download__faq-answer a {
    color: #017439;
    text-decoration: underline;
}
.page-download__faq-answer a:hover {
    color: #005f2f;
}

/* Final CTA Section */
.page-download__final-cta-section {
    padding: 60px 0 80px;
    background-color: #017439; /* Brand primary color background */
    color: #ffffff;
    text-align: center;
}

.page-download__final-cta-section .page-download__section-title {
    color: #ffffff;
}

.page-download__final-cta-section .page-download__section-description {
    color: #f0f0f0;
    margin-bottom: 50px;
}

/* Ensure all images adhere to min-size and no filter */
.page-download img {
    filter: none; /* Explicitly disable any filter */
}

/* Mobile Responsiveness */
@media (max-width: 1024px) {
    .page-download__hero-image img {
        aspect-ratio: 4/3;
    }
    .page-download__guide-steps {
        grid-template-columns: 1fr;
    }
    .page-download__guide-content {
        flex-direction: column;
        align-items: center;
    }
    .page-download__guide-content img {
        max-width: 400px;
        width: 100%;
    }
    .page-download__security-features {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    /* 1. HERO 主图区域 */
    .page-download__hero-section {
        padding: 10px 15px 30px;
    }
    .page-download__hero-image img {
        object-fit: contain !important;
        aspect-ratio: unset !important;
        width: 100% !important;
        height: auto !important;
        min-width: 200px !important;
        min-height: 200px !important;
    }
    .page-download__main-title {
        font-size: clamp(2rem, 8vw, 2.5rem);
        margin-bottom: 15px;
    }
    .page-download__hero-description {
        font-size: 1rem;
        margin-bottom: 25px;
    }
    .page-download__cta-buttons {
        flex-direction: column;
        gap: 15px;
        padding: 0 10px;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        overflow: hidden !important;
    }
    /* 5. 按钮与按钮容器 */
    .page-download__btn-primary,
    .page-download__btn-secondary,
    .page-download a[class*="button"],
    .page-download a[class*="btn"] {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
        padding-left: 15px !important;
        padding-right: 15px !important;
        font-size: 1rem;
    }

    /* General Section Styling for Mobile */
    .page-download__container {
        padding: 0 15px !important;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        overflow: hidden !important;
    }
    .page-download__section-title {
        font-size: clamp(1.8rem, 7vw, 2.2rem);
        margin-bottom: 15px;
    }
    .page-download__section-description {
        font-size: 0.95rem;
        margin-bottom: 30px;
    }

    /* Benefits Section */
    .page-download__benefits-section {
        padding: 40px 0;
    }
    .page-download__benefits-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .page-download__benefit-card img {
        min-width: 200px !important;
        min-height: 200px !important;
        width: 200px !important;
        height: 200px !important;
    }

    /* Guide Section */
    .page-download__guide-section {
        padding: 40px 0;
    }
    .page-download__guide-steps {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .page-download__guide-card .page-download__card-title {
        font-size: 1.5rem;
        margin-bottom: 20px;
    }
    .page-download__guide-content {
        flex-direction: column;
        gap: 20px;
        align-items: center;
    }
    .page-download__guide-content img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        min-width: 200px !important;
        min-height: 200px !important;
    }
    .page-download__guide-content ol {
        padding-left: 15px;
    }
    .page-download__guide-content ol li {
        font-size: 1rem;
        margin-bottom: 10px;
    }

    /* Security Section */
    .page-download__security-section {
        padding: 40px 0;
    }
    .page-download__security-features {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .page-download__feature-title {
        font-size: 1.3rem;
    }

    /* FAQ Section */
    .page-download__faq-section {
        padding: 40px 0;
    }
    details.page-download__faq-item summary.page-download__faq-question {
        padding: 15px 20px;
        font-size: 1rem;
    }
    .page-download__faq-qtext {
        font-size: 1rem;
    }
    .page-download__faq-toggle {
        font-size: 24px;
        width: 24px;
        margin-left: 10px;
    }
    details.page-download__faq-item .page-download__faq-answer {
        padding: 0 20px 20px;
        font-size: 0.95rem;
    }

    /* Final CTA Section */
    .page-download__final-cta-section {
        padding: 40px 0 60px;
    }

    /* 4. 通用图片与容器 */
    .page-download img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        display: block !important;
        box-sizing: border-box !important;
    }
    .page-download__section,
    .page-download__card,
    .page-download__container,
    .page-download__content-area,
    .page-download__text-block,
    .page-download__products-section {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px !important;
        padding-right: 15px !important;
        overflow-x: hidden !important;
    }
    /* 3. 装饰主标题 + 长文 SEO 区 */
    .page-download__article-body,
    .page-download__article-figure {
        max-width: 100% !important;
        width: 100% !important;
        margin-left: auto !important;
        margin-right: auto !important;
        text-align: center !important;
        box-sizing: border-box !important;
        padding-left: 15px !important;
        padding-right: 15px !important;
    }
    .page-download__section-title-wrap {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px !important;
        padding-right: 15px !important;
        text-align: center !important;
    }
}