:root {
    --text-main: #F2FFF6;
    --text-secondary: #A7D9B8;
    --background: #08160F;
    --card-b-g: #11271B;
    --border: #2E7A4E;
    --glow: #57E38D;
    --gold: #F2C14E;
    --divider: #1E3A2A;
    --deep-green: #0A4B2C;
}

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

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

.page-download__hero-section {
    position: relative;
    padding-top: 10px; /* Small top padding, body handles header offset */
    padding-bottom: 60px;
    color: var(--text-main); /* Light text for hero */
    text-align: center;
    overflow: hidden; /* Ensure content doesn't overflow */
}

.page-download__hero-image-wrapper {
    margin-bottom: 40px; /* Space between image and content */
}

.page-download__hero-image {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 10px;
    object-fit: cover;
    max-height: 675px; /* Limit height for aesthetic */
}

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

.page-download__main-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--gold); /* Use gold for main title */
    line-height: 1.2;
}

.page-download__hero-description {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    color: var(--text-secondary); /* Use secondary text color */
}

.page-download__cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
    flex-wrap: wrap; /* Allow buttons to wrap on smaller screens */
}

.page-download__cta-buttons--center {
    justify-content: center;
}

.page-download__cta-buttons--mobile-center {
    justify-content: center;
}

.page-download__btn-primary,
.page-download__btn-secondary {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    max-width: 100%; /* Ensure buttons don't overflow */
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
    text-align: center;
}

.page-download__btn-primary {
    background: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
    color: var(--text-main); /* White text for primary button */
    border: none;
}

.page-download__btn-primary:hover {
    background: linear-gradient(180deg, #13994A 0%, #2AD16F 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.page-download__btn-secondary {
    background-color: transparent;
    color: var(--gold); /* Gold text for secondary button */
    border: 2px solid var(--gold); /* Gold border */
}

.page-download__btn-secondary:hover {
    background-color: var(--gold);
    color: var(--background); /* Dark background text for secondary button hover */
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.page-download__section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-main);
    text-align: center;
    margin-bottom: 40px;
    position: relative;
    padding-bottom: 15px;
}

.page-download__section-title::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--glow); /* Use glow color for underline */
    border-radius: 2px;
}

.page-download__text-block {
    font-size: 1.1rem;
    color: var(--text-secondary);
    text-align: center;
    max-width: 900px;
    margin: 0 auto 30px auto;
}

/* Problem Solution Section */
.page-download__problem-solution-section {
    padding: 60px 0;
    background-color: var(--card-b-g); /* Use card background color */
}

.page-download__solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-download__solution-card {
    background-color: var(--background); /* Darker background for card */
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
    border: 1px solid var(--border); /* Use border color */
}

.page-download__solution-card:hover {
    transform: translateY(-5px);
}

.page-download__card-image {
    width: 100%;
    height: 200px; /* Fixed height for consistency */
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
    display: block; /* Ensure image behaves as a block element */
}

.page-download__card-title {
    font-size: 1.5rem;
    color: var(--gold); /* Gold for card titles */
    margin-bottom: 15px;
}

.page-download__card-text {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Alternative Links Section */
.page-download__alternative-links-section {
    padding: 60px 0;
    background-color: var(--background);
}

.page-download__link-list {
    list-style: none;
    padding: 0;
    margin-top: 40px;
}

.page-download__link-item {
    background-color: var(--card-b-g);
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
    border: 1px solid var(--border);
}

.page-download__link-item:hover {
    transform: translateX(5px);
}

.page-download__link-text {
    font-size: 1.4rem;
    font-weight: bold;
    color: var(--glow); /* Glow for links */
    text-decoration: none;
    display: block;
    margin-bottom: 10px;
}

.page-download__link-text:hover {
    text-decoration: underline;
}

.page-download__link-description {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* App Download Section */
.page-download__app-download-section {
    padding: 60px 0;
    background-color: var(--deep-green); /* Deep green background */
    color: var(--text-main);
}

.page-download__app-content-wrapper {
    display: flex;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap; /* Allow wrapping */
}

.page-download__app-text-content {
    flex: 1;
    min-width: 300px;
}

.page-download__app-image-wrapper {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    min-width: 300px;
}

.page-download__app-screenshot {
    max-width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    display: block; /* Ensure image behaves as a block element */
}

.page-download__app-features-list {
    list-style: none;
    padding: 0;
    margin: 30px 0;
}

.page-download__feature-item {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    font-size: 1.1rem;
    color: var(--text-main);
}

.page-download__feature-icon {
    color: var(--gold);
    font-size: 1.5rem;
    margin-right: 10px;
}

/* Guide Section */
.page-download__guide-section {
    padding: 60px 0;
    background-color: var(--background);
}

.page-download__guide-list {
    list-style: none;
    padding: 0;
    counter-reset: guide-step;
    margin-top: 40px;
}

.page-download__guide-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 30px;
    background-color: var(--card-b-g);
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border);
}

.page-download__guide-item::before {
    counter-increment: guide-step;
    content: "Bước " counter(guide-step);
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--glow);
    margin-right: 20px;
    flex-shrink: 0;
    min-width: 100px;
    text-align: right;
}

.page-download__guide-step-title {
    font-size: 1.6rem;
    color: var(--gold);
    margin-top: 0;
    margin-bottom: 10px;
}

.page-download__guide-text {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* FAQ Section */
.page-download__faq-section {
    padding: 60px 0;
    background-color: var(--card-b-g);
}

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

.page-download__faq-item {
    background-color: var(--background);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 15px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.page-download__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 25px;
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--text-main);
    cursor: pointer;
    background-color: var(--card-b-g);
    list-style: none;
    user-select: none;
}

.page-download__faq-question::-webkit-details-marker {
    display: none;
}

.page-download__faq-qtext {
    flex-grow: 1;
    color: var(--text-main);
}

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

.page-download__faq-item[open] .page-download__faq-toggle {
    content: "−";
}

.page-download__faq-answer {
    padding: 0 25px 20px 25px;
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out, padding 0.3s ease-out;
}

.page-download__faq-item[open] .page-download__faq-answer {
    max-height: 500px; /* Arbitrary large value for smooth transition */
    padding-top: 15px;
}

/* Support CTA Section */
.page-download__support-cta-section {
    padding: 60px 0;
    background-color: var(--deep-green);
    text-align: center;
    color: var(--text-main);
}

/* General image styles */
.page-download img {
    max-width: 100%;
    height: auto;
    display: block; /* Ensure images are block-level for max-width to work */
}

/* Responsive styles */
@media (max-width: 1024px) {
    .page-download__main-title {
        font-size: clamp(2rem, 4.5vw, 3rem);
    }
    .page-download__hero-description {
        font-size: 1.1rem;
    }
    .page-download__section-title {
        font-size: 2.2rem;
    }
    .page-download__cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    .page-download__btn-primary,
    .page-download__btn-secondary {
        width: 80%;
        max-width: 400px;
    }
    .page-download__app-content-wrapper {
        flex-direction: column;
    }
    .page-download__app-image-wrapper {
        order: -1; /* Image above text on smaller screens */
    }
    .page-download__guide-item {
        flex-direction: column;
        align-items: flex-start;
    }
    .page-download__guide-item::before {
        text-align: left;
        margin-bottom: 10px;
    }
}

@media (max-width: 768px) {
    /* HERO 主图区域 */
    .page-download__hero-section {
        padding-top: 10px !important; /* Small top padding */
        padding-bottom: 40px;
    }
    .page-download__hero-image-wrapper {
        margin-bottom: 30px;
    }
    .page-download__main-title {
        font-size: clamp(1.8rem, 7vw, 2.5rem);
        padding: 0 15px;
    }
    .page-download__hero-description {
        font-size: 1rem;
        padding: 0 15px;
    }

    /* 通用图片与容器 */
    .page-download img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }
    .page-download__container,
    .page-download__section,
    .page-download__card,
    .page-download__app-content-wrapper {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }

    /* 按钮与按钮容器 */
    .page-download__cta-buttons,
    .page-download__button-group,
    .page-download__btn-container {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
        flex-direction: column !important; /* Force vertical stacking */
        gap: 10px;
    }
    .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: 12px 20px; /* Adjust padding for mobile */
    }

    /* 其他内容模块 */
    .page-download__section-title {
        font-size: 2rem;
        margin-bottom: 30px;
        padding-bottom: 10px;
    }
    .page-download__section-title::after {
        width: 60px;
        height: 3px;
    }
    .page-download__text-block {
        font-size: 1rem;
        margin-bottom: 20px;
    }
    .page-download__solution-grid {
        grid-template-columns: 1fr; /* Single column for solution cards */
        gap: 20px;
    }
    .page-download__solution-card {
        padding: 20px;
    }
    .page-download__card-image {
        height: 180px;
    }
    .page-download__card-title {
        font-size: 1.3rem;
    }
    .page-download__link-item {
        padding: 20px;
    }
    .page-download__link-text {
        font-size: 1.2rem;
    }
    .page-download__app-text-content {
        order: 1; /* Text below image on mobile */
    }
    .page-download__app-image-wrapper {
        order: 0; /* Image above text on mobile */
    }
    .page-download__guide-item {
        padding: 20px;
    }
    .page-download__guide-item::before {
        font-size: 1.5rem;
        min-width: unset;
        margin-right: 0;
        margin-bottom: 10px;
    }
    .page-download__guide-step-title {
        font-size: 1.4rem;
    }
    .page-download__faq-question {
        font-size: 1.1rem;
        padding: 15px 20px;
    }
    .page-download__faq-toggle {
        font-size: 1.3rem;
    }
    .page-download__faq-answer {
        padding: 0 20px 15px 20px;
    }
}