.page-download {
    font-family: Arial, sans-serif;
    color: #333333; /* Text Main */
    line-height: 1.6;
    background-color: #F5F7FA; /* Background */
}

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

.page-download__hero-section {
    padding-top: 10px; /* Small top padding, body handles header offset */
    padding-bottom: 60px;
    background: #FF5A4F; /* Auxiliary color for top section background */
    color: #ffffff;
    text-align: center;
}

.page-download__hero-section .page-download__container {
    display: flex;
    flex-direction: column; /* Default column for mobile first */
    align-items: center;
    gap: 40px;
}

.page-download__hero-content {
    max-width: 800px;
    margin-bottom: 30px;
}

.page-download__main-title {
    font-size: clamp(2em, 5vw, 2.8em); /* Responsive H1 */
    font-weight: bold;
    margin-bottom: 20px;
    line-height: 1.2;
    color: #ffffff;
}

.page-download__description {
    font-size: 1.1em;
    margin-bottom: 30px;
    color: #ffffff;
}

.page-download__cta-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap; /* Allow buttons to wrap on smaller screens */
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.page-download__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 15px 30px;
    border-radius: 8px;
    font-weight: bold;
    text-decoration: none;
    transition: background-color 0.3s ease, transform 0.3s ease;
    cursor: pointer;
    text-align: center;
    box-sizing: border-box; /* Crucial for responsive buttons */
    white-space: normal; /* Allow text wrap */
    word-wrap: break-word; /* Allow text wrap */
    max-width: 100%; /* Ensure buttons don't exceed container */
    width: auto; /* Default width */
    min-width: 180px;
}

.page-download__btn-primary {
    background: linear-gradient(180deg, #FF5A4F 0%, #E53935 100%); /* Button gradient */
    color: #ffffff;
    border: none;
}

.page-download__btn-primary:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

.page-download__btn-secondary {
    background: #ffffff;
    color: #E53935; /* Main color for text */
    border: 2px solid #E53935; /* Main color for border */
}

.page-download__btn-secondary:hover {
    transform: translateY(-2px);
    background-color: #f0f0f0;
}

.page-download__hero-image-wrapper {
    width: 100%;
    max-width: 600px; /* Limit image width */
}

.page-download__hero-image {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 10px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.page-download__section-title {
    font-size: 2.2em;
    font-weight: bold;
    text-align: center;
    margin-bottom: 40px;
    color: #E53935; /* Main color for titles */
}

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

.page-download__why-app-section {
    padding: 80px 0;
    background: #E53935; /* Main color for dark section */
    color: #ffffff;
}

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

.page-download__info-card {
    background: rgba(255, 255, 255, 0.15); /* Slightly transparent white for cards on dark bg */
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    color: #ffffff;
}

.page-download__card-title {
    font-size: 1.4em;
    font-weight: bold;
    margin-bottom: 15px;
    color: #ffffff;
}

.page-download__features-section {
    padding: 80px 0;
    background-color: #F5F7FA; /* Background */
}

.page-download__feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.page-download__feature-item {
    background: #ffffff; /* Card BG */
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    color: #333333;
}

.page-download__feature-image {
    width: 100%;
    height: 250px; /* Fixed height for consistency */
    object-fit: cover;
    display: block;
}

.page-download__feature-title {
    font-size: 1.5em;
    font-weight: bold;
    margin: 20px 20px 10px 20px;
    color: #E53935; /* Main color */
}

.page-download__feature-item p {
    margin: 0 20px 20px 20px;
    color: #333333;
}

.page-download__how-to-download-section {
    padding: 80px 0;
    background-color: #F5F7FA; /* Background */
}

.page-download__steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.page-download__step-item {
    background: #ffffff; /* Card BG */
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
    color: #333333;
}

.page-download__step-number {
    font-size: 2.5em;
    font-weight: bold;
    color: #E53935; /* Main color */
    margin-bottom: 15px;
}

.page-download__step-title {
    font-size: 1.3em;
    font-weight: bold;
    margin-bottom: 15px;
    color: #333333;
}

.page-download__step-item img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 20px auto 0 auto;
    border-radius: 8px;
}

.page-download__cta-buttons--bottom {
    margin-top: 50px;
}

.page-download__promo-section {
    padding: 80px 0;
    background: #E53935; /* Main color */
    color: #ffffff;
}

.page-download__promo-content {
    display: flex;
    flex-direction: column; /* Default column for mobile first */
    align-items: center;
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}

.page-download__promo-image {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

.page-download__promo-text p {
    font-size: 1.1em;
    margin-bottom: 25px;
    color: #ffffff;
}

.page-download__promo-text .page-download__btn {
    background: #ffffff;
    color: #E53935;
    border: none;
}

.page-download__promo-text .page-download__btn:hover {
    background-color: #f0f0f0;
}

.page-download__faq-section {
    padding: 80px 0;
    background-color: #F5F7FA; /* Background */
}

.page-download__faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.page-download__faq-item {
    background: #ffffff; /* Card BG */
    border: 1px solid #E0E0E0; /* Border */
    border-radius: 8px;
    margin-bottom: 15px;
    overflow: hidden;
    color: #333333;
}

.page-download__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    font-size: 1.1em;
    font-weight: bold;
    cursor: pointer;
    background-color: #ffffff;
    color: #333333;
    list-style: none; /* Hide default marker */
}

.page-download__faq-question::-webkit-details-marker {
    display: none; /* Hide default marker for webkit */
}

.page-download__faq-toggle {
    font-size: 1.5em;
    line-height: 1;
    color: #E53935; /* Main color */
    transition: transform 0.3s ease;
    display: inline-block; /* Ensure transform works */
}

.page-download__faq-item[open] .page-download__faq-toggle {
    transform: rotate(45deg); /* Rotate plus to become cross */
}

.page-download__faq-answer {
    padding: 0 25px 20px 25px;
    font-size: 1em;
    line-height: 1.6;
    color: #333333;
}

.page-download__final-cta-section {
    padding: 60px 0;
    background: linear-gradient(180deg, #FF5A4F 0%, #E53935 100%); /* Button gradient */
    color: #ffffff;
    text-align: center;
}

.page-download__final-cta-section .page-download__description {
    max-width: 800px;
    margin: 0 auto 30px auto;
    color: #ffffff;
}

.page-download__btn--large {
    padding: 18px 40px;
    font-size: 1.2em;
    min-width: 250px;
}

/* Responsive styles */
@media (min-width: 769px) {
    .page-download__hero-section .page-download__container {
        flex-direction: row; /* Row for desktop */
        justify-content: space-between;
        text-align: left;
    }

    .page-download__hero-content {
        margin-bottom: 0;
        margin-right: 40px;
    }

    .page-download__cta-buttons {
        justify-content: flex-start;
    }

    .page-download__promo-content {
        flex-direction: row; /* Row for desktop */
        text-align: left;
    }
    
    .page-download__promo-image {
        flex-shrink: 0; /* Prevent image from shrinking too much */
        width: 40%;
    }

    .page-download__promo-text {
        flex-grow: 1;
        padding-left: 30px;
    }
}

/* @media (max-width: 1024px) - Intermediate adjustments if needed, but 768px is critical */
@media (max-width: 1024px) {
    .page-download__container {
        padding: 0 15px;
    }

    .page-download__main-title {
        font-size: clamp(2em, 5vw, 2.5em);
    }

    .page-download__section-title {
        font-size: 2em;
    }
}

/* @media (max-width: 768px) - CRITICAL MOBILE STYLES */
@media (max-width: 768px) {
    /* 1. 顶区标题 + 双 CTA */
    .page-download__hero-section {
        padding-top: 10px !important; /* Small top padding, body handles header offset */
        padding-bottom: 40px;
    }

    .page-download__main-title {
        font-size: 2em;
        margin-bottom: 15px;
    }

    .page-download__description {
        font-size: 1em;
        margin-bottom: 25px;
    }

    .page-download__cta-buttons {
        flex-direction: column; /* Stack buttons vertically */
        gap: 10px;
        padding-left: 15px;
        padding-right: 15px;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
    }

    .page-download__btn {
        width: 100% !important;
        max-width: 100% !important;
        padding-left: 15px;
        padding-right: 15px;
        font-size: 1em;
        white-space: normal !important;
        word-wrap: break-word !important;
        box-sizing: border-box !important;
    }

    /* 2. 单栏长文容器 */
    .page-download__container {
        padding-left: 15px !important;
        padding-right: 15px !important;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
    }

    .page-download__section-title {
        font-size: 1.8em;
        margin-bottom: 30px;
    }

    .page-download__why-app-section,
    .page-download__features-section,
    .page-download__how-to-download-section,
    .page-download__promo-section,
    .page-download__faq-section,
    .page-download__final-cta-section {
        padding: 50px 0;
    }

    .page-download__grid,
    .page-download__feature-grid,
    .page-download__steps-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .page-download__info-card,
    .page-download__feature-item,
    .page-download__step-item,
    .page-download__faq-item {
        padding: 20px;
    }

    /* 3. 通用图片与 figure */
    .page-download img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        display: block !important;
        box-sizing: border-box !important;
    }
    
    .page-download__feature-image {
        height: auto;
    }

    /* 4. 按钮与按钮容器 (already covered in cta-buttons and btn rules above) */
    .page-download__cta-buttons--bottom {
        flex-direction: column;
        gap: 10px;
    }

    /* 5. 注册教程与 FAQ 区块 */
    .page-download__step-number {
        font-size: 2em;
    }

    .page-download__step-title {
        font-size: 1.2em;
    }

    .page-download__faq-question {
        font-size: 1em;
        padding: 15px 20px;
    }

    .page-download__faq-answer {
        padding: 0 20px 15px 20px;
    }

    .page-download__promo-content {
        flex-direction: column;
        gap: 20px;
    }

    .page-download__promo-image {
        width: 100%;
    }
    
    .page-download__promo-text {
        padding-left: 0;
        text-align: center;
    }

    .page-download__final-cta-section .page-download__btn--large {
        font-size: 1.1em;
        min-width: unset;
        width: 100% !important;
        max-width: 100% !important;
        padding-left: 15px;
        padding-right: 15px;
        box-sizing: border-box !important;
    }
}