:root {
    --primary-color: #11A84E;
    --secondary-color: #22C768;
    --button-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
    --card-bg: #11271B;
    --background-color: #08160F;
    --text-main-color: #F2FFF6;
    --text-secondary-color: #A7D9B8;
    --border-color: #2E7A4E;
    --glow-color: #57E38D;
    --gold-color: #F2C14E;
    --divider-color: #1E3A2A;
    --deep-green-color: #0A4B2C;
}

/* Base styles for the download page */
.page-download {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-main-color); /* Default text color for the page */
    background-color: var(--background-color); /* Page background */
}

/* Ensure images are responsive and don't get filtered */
.page-download img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    /* 禁止使用CSS filter改变图片颜色 */
    filter: none !important;
}

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

.page-download__section-title {
    font-size: clamp(1.8rem, 2.5vw, 2.8rem);
    color: var(--gold-color);
    text-align: center;
    margin-bottom: 40px;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: 0.05em;
    text-shadow: 0 0 10px rgba(242, 193, 78, 0.5);
}

.page-download__text-block {
    font-size: 1.1rem;
    color: var(--text-secondary-color);
    margin-bottom: 20px;
    text-align: justify;
}

/* Hero Section */
.page-download__hero-section {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 10px 0 60px; /* Small top padding, more bottom padding */
    overflow: hidden;
    background: var(--deep-green-color); /* Fallback background */
}

.page-download__hero-image-wrapper {
    width: 100%;
    position: relative;
    z-index: 1;
}

.page-download__hero-image {
    width: 100%;
    height: auto;
    object-fit: cover;
    border-radius: 0; /* Hero image usually full width, no rounded corners */
    box-shadow: none;
}

.page-download__hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 30px 20px;
    max-width: 900px;
    margin-top: -80px; /* Overlap slightly with the image for visual flow */
    background: rgba(8, 22, 15, 0.85); /* Semi-transparent background for readability */
    border-radius: 15px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
}

.page-download__main-title {
    font-size: clamp(2rem, 4vw, 3.5rem);
    color: var(--gold-color);
    margin-bottom: 20px;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: 0.03em;
    text-shadow: 0 0 15px rgba(242, 193, 78, 0.7);
}

.page-download__hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary-color);
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.page-download__cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap; /* Allow buttons to wrap on smaller screens */
}

.page-download__btn-primary,
.page-download__btn-secondary,
.page-download__download-button {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    text-align: center;
    box-sizing: border-box;
    max-width: 100%; /* Ensure responsiveness */
    white-space: normal; /* Allow text to wrap */
    word-wrap: break-word; /* Break long words */
}

.page-download__btn-primary,
.page-download__download-button {
    background: var(--button-gradient);
    color: #ffffff;
    border: 2px solid var(--glow-color);
    box-shadow: 0 0 15px var(--glow-color);
}

.page-download__btn-primary:hover,
.page-download__download-button:hover {
    background: linear-gradient(180deg, #13994A 0%, #2AD16F 100%);
    box-shadow: 0 0 25px var(--glow-color);
    transform: translateY(-2px);
}

.page-download__btn-secondary {
    background: var(--card-bg);
    color: var(--glow-color);
    border: 2px solid var(--glow-color);
    box-shadow: 0 0 10px rgba(87, 227, 141, 0.3);
}

.page-download__btn-secondary:hover {
    background: var(--glow-color);
    color: var(--card-bg);
    box-shadow: 0 0 20px var(--glow-color);
    transform: translateY(-2px);
}

/* Section backgrounds based on color scheme */
.page-download__introduction-section,
.page-download__download-guide,
.page-download__security-section,
.page-download__troubleshooting-section,
.page-download__cta-final-section {
    background-color: var(--background-color);
    color: var(--text-main-color);
    padding: 60px 0;
}

.page-download__why-app-section,
.page-download__app-features-section,
.page-download__promotions-section,
.page-download__faq-section {
    background-color: var(--card-bg);
    color: var(--text-secondary-color);
    padding: 60px 0;
}


.page-download__grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.page-download__card {
    background-color: var(--deep-green-color);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    color: var(--text-secondary-color);
}

.page-download__card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4), 0 0 20px var(--glow-color);
}

.page-download__card-title {
    font-size: 1.5rem;
    color: var(--gold-color);
    margin-bottom: 15px;
    font-weight: 600;
}

/* Download Guide Section */
.page-download__platform-section {
    margin-bottom: 60px;
    border-bottom: 1px solid var(--divider-color);
    padding-bottom: 40px;
}

.page-download__platform-section:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.page-download__platform-title {
    font-size: 2rem;
    color: var(--gold-color);
    text-align: center;
    margin-bottom: 30px;
    font-weight: 700;
}

.page-download__platform-content {
    display: flex;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
    justify-content: center;
}

.page-download__platform-content--reversed {
    flex-direction: row-reverse;
}

.page-download__platform-image {
    flex: 1;
    min-width: 300px;
    max-width: 500px;
}

.page-download__instruction-list {
    flex: 2;
    min-width: 300px;
    list-style: decimal;
    padding-left: 25px;
    color: var(--text-secondary-color);
    font-size: 1.05rem;
}

.page-download__instruction-list li {
    margin-bottom: 15px;
}

.page-download__instruction-list li strong {
    color: var(--text-main-color);
}

/* App Features Section */
.page-download__features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.page-download__feature-item {
    text-align: center;
}

.page-download__feature-title {
    font-size: 1.4rem;
    color: var(--gold-color);
    margin-bottom: 10px;
    font-weight: 600;
}

.page-download__feature-image {
    text-align: center;
    margin-top: 30px;
}

/* Security Section */
.page-download__security-content {
    display: flex;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
    justify-content: center;
}

.page-download__security-image {
    flex: 1;
    min-width: 300px;
    max-width: 500px;
}

.page-download__security-list {
    flex: 2;
    min-width: 300px;
    list-style: none;
    padding: 0;
    color: var(--text-secondary-color);
    font-size: 1.05rem;
}

.page-download__security-list li {
    margin-bottom: 15px;
    position: relative;
    padding-left: 30px;
}

.page-download__security-list li::before {
    content: '✅';
    position: absolute;
    left: 0;
    color: var(--glow-color);
    font-size: 1.2rem;
    line-height: 1;
}

/* Promotions Section */
.page-download__promotion-list {
    list-style: none;
    padding: 0;
    margin-bottom: 30px;
}

.page-download__promotion-list li {
    background-color: var(--deep-green-color);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    font-size: 1.05rem;
    color: var(--text-main-color);
}

.page-download__promotion-list li strong {
    color: var(--gold-color);
}

/* Troubleshooting Section */
.page-download__troubleshoot-list {
    list-style: disc;
    padding-left: 20px;
    color: var(--text-secondary-color);
    font-size: 1rem;
}

.page-download__troubleshoot-list li {
    margin-bottom: 8px;
}

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

.page-download__faq-item {
    background-color: var(--deep-green-color);
    margin-bottom: 15px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.page-download__faq-item summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1.15rem;
    color: var(--gold-color);
    list-style: none; /* Remove default marker */
}

.page-download__faq-item summary::-webkit-details-marker {
    display: none; /* Remove default marker for Webkit browsers */
}

.page-download__faq-toggle {
    font-size: 1.5rem;
    line-height: 1;
    color: var(--glow-color);
    margin-left: 15px;
}

.page-download__faq-answer {
    padding: 0 20px 20px;
    font-size: 1rem;
    color: var(--text-secondary-color);
    text-align: justify;
}

.page-download__faq-answer p {
    margin: 0;
}

/* Final CTA Section */
.page-download__cta-final-section {
    text-align: center;
}

/* Responsive adjustments */
@media (max-width: 992px) {
    .page-download__platform-content,
    .page-download__platform-content--reversed,
    .page-download__security-content {
        flex-direction: column;
    }

    .page-download__platform-image,
    .page-download__security-image {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .page-download__container {
        padding: 15px;
    }

    .page-download__hero-content {
        margin-top: -60px;
        padding: 20px;
        border-radius: 10px;
    }

    .page-download__main-title {
        font-size: clamp(1.8rem, 8vw, 2.5rem); /* More aggressive clamp for mobile H1 */
        margin-bottom: 15px;
    }

    .page-download__hero-description {
        font-size: 1rem;
        margin-bottom: 25px;
    }

    .page-download__cta-buttons {
        flex-direction: column;
        gap: 15px;
        width: 100%;
    }

    .page-download__btn-primary,
    .page-download__btn-secondary,
    .page-download__download-button {
        width: 100% !important;
        max-width: 100% !important;
        padding: 12px 20px;
        font-size: 1rem;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }
    
    .page-download__section-title {
        font-size: clamp(1.5rem, 6vw, 2.2rem);
        margin-bottom: 30px;
    }

    .page-download__text-block,
    .page-download__instruction-list,
    .page-download__security-list,
    .page-download__promotion-list li,
    .page-download__troubleshoot-list,
    .page-download__faq-answer {
        font-size: 0.95rem;
    }

    .page-download__card-title,
    .page-download__feature-title {
        font-size: 1.3rem;
    }

    .page-download__platform-title {
        font-size: 1.8rem;
    }

    .page-download__instruction-list,
    .page-download__security-list {
        padding-left: 20px;
    }

    /* Mobile image responsiveness */
    .page-download img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }

    /* Mobile container for images/videos/buttons */
    .page-download__hero-section,
    .page-download__introduction-section,
    .page-download__why-app-section,
    .page-download__download-guide,
    .page-download__app-features-section,
    .page-download__security-section,
    .page-download__promotions-section,
    .page-download__troubleshooting-section,
    .page-download__faq-section,
    .page-download__cta-final-section,
    .page-download__card,
    .page-download__platform-image,
    .page-download__security-image,
    .page-download__feature-image,
    .page-download__hero-content,
    .page-download__platform-content,
    .page-download__security-content {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
        overflow-x: hidden; /* Prevent horizontal scroll */
    }
    .page-download__hero-section {
        padding-top: 10px !important; /* Small top padding for hero on mobile */
    }
}