:root {
    --primary-color: #11A84E; /* Main color */
    --secondary-color: #22C768; /* Auxiliary color */
    --button-gradient-start: #2AD16F;
    --button-gradient-end: #13994A;
    --bg-card: #11271B;
    --bg-main: #08160F;
    --text-main: #F2FFF6;
    --text-secondary: #A7D9B8;
    --border-color: #2E7A4E;
    --glow-color: #57E38D;
    --gold-color: #F2C14E;
    --divider-color: #1E3A2A;
    --deep-green-color: #0A4B2C;
}

.page-index {
    color: var(--text-main); /* Default text color for the page content, assuming dark body background from shared.css */
    background: var(--bg-main); /* Specific background for main content area if needed, otherwise body takes over */
    font-family: 'Arial', sans-serif; /* Example font */
    line-height: 1.6;
    overflow-x: hidden; /* Prevent horizontal scrolling */
}

/* 🚨 桌面端视频区域样式（必须严格遵守） */
.page-index__video-section {
    position: relative;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    /* 🚨 页头整段高度 bởi shared body { padding-top: var(--header-offset); } đảm nhiệm; tại đây chỉ dùng khoảng cách nhỏ phía trên, không viết lại var(--header-offset) để tránh khoảng trắng gấp đôi */
    padding-top: 10px;
    background: linear-gradient(180deg, var(--deep-green-color) 0%, var(--bg-main) 100%);
    box-sizing: border-box;
}

.page-index__video-container {
    position: relative;
    width: 100%; /* Crucial for desktop flex layout */
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    overflow: hidden; /* Ensure no overflow */
}

/* 🚨 Video click link style (strictly required) */
.page-index__video-link {
    display: block;
    text-decoration: none;
    position: relative;
    width: 100%;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-radius: 8px;
    overflow: hidden;
}

.page-index__video-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.page-index__video-wrapper {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 aspect ratio - 🚨 PageSpeed optimization: fixed aspect ratio to prevent layout shift (CLS) */
    height: 0;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    background-color: #000; /* Fallback for video */
}

.page-index__video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 8px;
    object-fit: cover;
    pointer-events: none; /* Prevent video controls from blocking click events */
    background-color: #000; /* Ensures black background if video fails */
}

/* 🚨 Video click hint overlay style (optional, enhances user experience) */
.page-index__video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 8px;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 1;
}

.page-index__video-link:hover .page-index__video-overlay {
    opacity: 1;
}

.page-index__video-click-hint {
    color: var(--text-main);
    font-size: 18px;
    font-weight: bold;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.6);
    padding: 10px 20px;
    background: rgba(17, 168, 78, 0.8); /* Use RGB with opacity */
    border-radius: 5px;
    white-space: nowrap;
}

/* 🚨 Play Now button style (strictly required, centered below video) */
.page-index__video-cta {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
    box-sizing: border-box;
}

.page-index__play-now-button {
    display: inline-block;
    padding: 15px 40px;
    background: linear-gradient(180deg, var(--button-gradient-start) 0%, var(--button-gradient-end) 100%);
    color: #ffffff;
    text-decoration: none;
    border-radius: 8px;
    font-size: 18px;
    font-weight: bold;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    border: none;
    cursor: pointer;
    white-space: nowrap; /* Prevent text wrapping on desktop */
}

.page-index__play-now-button:hover {
    background: linear-gradient(180deg, var(--button-gradient-end) 0%, var(--button-gradient-start) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}

.page-index__play-now-button:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Module 1: H1 Title + CTA Buttons */
.page-index__title-section {
    padding: 80px 20px;
    text-align: center;
    background: var(--bg-main);
    box-sizing: border-box;
}

.page-index__title-container {
    max-width: 900px;
    margin: 0 auto;
    box-sizing: border-box;
}

.page-index__main-title {
    font-size: clamp(28px, 4vw, 48px); /* H1 font size with clamp */
    font-weight: bold;
    color: var(--gold-color);
    margin-bottom: 20px;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.page-index__title-description {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.page-index__cta-buttons {
    display: flex;
    flex-wrap: wrap; /* Allow wrapping on smaller screens */
    justify-content: center;
    gap: 20px;
    box-sizing: border-box;
}

.page-index__cta-button {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 18px;
    font-weight: bold;
    text-decoration: none;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    border: none;
    cursor: pointer;
    white-space: nowrap;
}

.page-index__cta-button--primary {
    background: linear-gradient(180deg, var(--button-gradient-start) 0%, var(--button-gradient-end) 100%);
    color: #ffffff;
}

.page-index__cta-button--primary:hover {
    background: linear-gradient(180deg, var(--button-gradient-end) 0%, var(--button-gradient-start) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.3);
}

.page-index__cta-button--secondary {
    background: var(--bg-card);
    color: var(--gold-color);
    border: 2px solid var(--gold-color);
}

.page-index__cta-button--secondary:hover {
    background: var(--gold-color);
    color: var(--bg-card);
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.3);
}

/* Module 3: Brand Introduction */
.page-index__brand-section {
    padding: 80px 20px;
    background: var(--bg-card);
    box-sizing: border-box;
}

.page-index__brand-container {
    max-width: 1200px;
    margin: 0 auto;
    box-sizing: border-box;
}

.page-index__brand-title {
    font-size: 36px;
    font-weight: bold;
    color: var(--gold-color);
    text-align: center;
    margin-bottom: 50px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

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

.page-index__brand-item {
    background: var(--deep-green-color);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-index__brand-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.page-index__brand-item-title {
    font-size: 24px;
    color: var(--text-main);
    margin-bottom: 15px;
    font-weight: 600;
}

.page-index__brand-item p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Module 2: FAQ */
.page-index__faq-section {
    padding: 80px 20px;
    background: var(--bg-main);
    box-sizing: border-box;
}

.page-index__faq-container {
    max-width: 900px;
    margin: 0 auto;
    box-sizing: border-box;
}

.page-index__faq-main-title {
    font-size: 36px;
    font-weight: bold;
    color: var(--gold-color);
    text-align: center;
    margin-bottom: 50px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

/* details as FAQ card */
details.page-index__faq-item {
    margin-bottom: 15px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    background: var(--bg-card);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

details.page-index__faq-item[open] {
    background: var(--deep-green-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

details.page-index__faq-item summary.page-index__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 25px;
    cursor: pointer;
    user-select: none;
    list-style: none;
    transition: background-color 0.3s ease;
    color: var(--text-main);
}

details.page-index__faq-item summary.page-index__faq-question::-webkit-details-marker {
    display: none;
}

details.page-index__faq-item summary.page-index__faq-question:hover {
    background: var(--deep-green-color);
}

.page-index__faq-qtext {
    flex: 1;
    font-size: 18px;
    font-weight: 600;
    line-height: 1.5;
    text-align: left;
    color: var(--text-main);
}

.page-index__faq-toggle {
    font-size: 28px;
    font-weight: bold;
    color: var(--gold-color);
    flex-shrink: 0;
    margin-left: 20px;
    width: 30px;
    text-align: center;
    transition: transform 0.3s ease;
}

details.page-index__faq-item[open] .page-index__faq-toggle {
    transform: rotate(45deg); /* Change + to X or similar visually */
}

details.page-index__faq-item .page-index__faq-answer {
    padding: 0 25px 25px;
    background: var(--deep-green-color);
    border-radius: 0 0 10px 10px;
    color: var(--text-secondary);
}

.page-index__faq-answer p {
    margin: 0;
    font-size: 16px;
    line-height: 1.7;
}

/* Module 4: Blog List */
.page-index__blog-section {
    padding: 80px 20px;
    background: linear-gradient(180deg, var(--bg-main) 0%, var(--deep-green-color) 100%);
    box-sizing: border-box;
}

.page-index__blog-container {
    max-width: 1200px;
    margin: 0 auto;
    box-sizing: border-box;
}

.page-index__blog-title {
    font-size: 36px;
    font-weight: bold;
    color: var(--gold-color);
    text-align: center;
    margin-bottom: 50px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

.page-index__blog-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.page-index__blog-item {
    background: var(--bg-card);
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
}

.page-index__blog-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.page-index__blog-item-thumbnail {
    width: 100%;
    height: 200px; /* Fixed height for consistency */
    overflow: hidden;
}

.page-index__blog-item-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.page-index__blog-item:hover .page-index__blog-item-thumbnail img {
    transform: scale(1.05);
}

.page-index__blog-item-content {
    padding: 20px;
}

.page-index__blog-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.page-index__blog-item-title {
    font-size: 20px;
    font-weight: bold;
    color: var(--text-main);
    margin-bottom: 10px;
    line-height: 1.4;
    transition: color 0.3s ease;
}

.page-index__blog-link:hover .page-index__blog-item-title {
    color: var(--gold-color);
}

.page-index__blog-item-excerpt {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.6;
}

.page-index__blog-item-date {
    font-size: 14px;
    color: var(--gold-color);
    display: block;
    text-align: right;
}

.page-index__view-all-button-container {
    text-align: center;
}

.page-index__view-all-button {
    display: inline-block;
    padding: 12px 30px;
    background: linear-gradient(180deg, var(--button-gradient-start) 0%, var(--button-gradient-end) 100%);
    color: #ffffff;
    text-decoration: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    border: none;
    cursor: pointer;
}

.page-index__view-all-button:hover {
    background: linear-gradient(180deg, var(--button-gradient-end) 0%, var(--button-gradient-start) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.3);
}

/* 🚨 Mobile responsive design (strictly required) */
@media (max-width: 768px) {
    /* General mobile padding */
    .page-index__video-section,
    .page-index__title-section,
    .page-index__brand-section,
    .page-index__faq-section,
    .page-index__blog-section {
        padding: 40px 15px;
        padding-top: 10px !important; /* Specific for video section */
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        overflow: hidden !important;
    }

    /* Video Section Mobile */
    .page-index__video-container {
        max-width: 100% !important;
        width: 100% !important;
        padding-left: 0;
        padding-right: 0;
        overflow: hidden !important;
    }
    
    .page-index__video-link {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }
    
    .page-index__video-wrapper {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        border-radius: 4px;
        overflow: hidden !important;
    }
    
    .page-index__video {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        border-radius: 4px;
        object-fit: contain; /* Ensure video fits without cropping */
    }

    .page-index__video-cta {
        margin-top: 20px;
        padding-left: 15px;
        padding-right: 15px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }

    .page-index__play-now-button {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding: 12px 25px !important;
        font-size: 16px !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }

    /* H1 Title Section Mobile */
    .page-index__main-title {
        font-size: clamp(24px, 8vw, 36px);
        margin-bottom: 15px;
    }

    .page-index__title-description {
        font-size: 16px;
        margin-bottom: 30px;
    }

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

    .page-index__cta-button {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding: 12px 20px !important;
        font-size: 16px !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }

    /* Brand Section Mobile */
    .page-index__brand-title,
    .page-index__faq-main-title,
    .page-index__blog-title {
        font-size: 28px;
        margin-bottom: 30px;
    }

    .page-index__brand-item-title {
        font-size: 20px;
    }

    .page-index__brand-item p {
        font-size: 15px;
    }

    /* FAQ Section Mobile */
    details.page-index__faq-item summary.page-index__faq-question {
        padding: 15px 20px;
    }

    .page-index__faq-qtext {
        font-size: 16px;
    }

    .page-index__faq-toggle {
        font-size: 24px;
        margin-left: 15px;
        width: 25px;
    }

    details.page-index__faq-item .page-index__faq-answer {
        padding: 0 20px 20px;
    }

    .page-index__faq-answer p {
        font-size: 15px;
    }

    /* Blog Section Mobile */
    .page-index__blog-list {
        grid-template-columns: 1fr; /* Single column on mobile */
        gap: 20px;
    }

    .page-index__blog-item-thumbnail {
        height: 180px;
    }

    .page-index__blog-item-title {
        font-size: 18px;
    }

    .page-index__blog-item-excerpt {
        font-size: 14px;
    }

    .page-index__view-all-button {
        padding: 10px 25px;
        font-size: 15px;
    }

    /* 🚨 All images general mobile adaptation */
    .page-index img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        display: block !important;
    }
    
    /* 🚨 All content containers general mobile adaptation */
    .page-index__video-section,
    .page-index__title-section,
    .page-index__brand-section,
    .page-index__faq-section,
    .page-index__blog-section,
    .page-index__video-container,
    .page-index__title-container,
    .page-index__brand-container,
    .page-index__faq-container,
    .page-index__blog-container,
    .page-index__blog-item,
    .page-index__brand-item {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
        overflow: hidden !important;
    }

    /* Reset padding for specific inner elements if they already have full width handling */
    .page-index__video-container,
    .page-index__video-link,
    .page-index__video-wrapper {
        padding-left: 0 !important;
        padding-right: 0 !important;
    }
}

/* Ensure text contrast for default elements */
.page-index h1, .page-index h2, .page-index h3, .page-index h4, .page-index h5, .page-index h6 {
    color: var(--text-main); /* Default for headings */
}
.page-index p, .page-index li {
    color: var(--text-secondary); /* Default for paragraphs and lists */
}

/* Specific overrides for contrast where needed, e.g., gold on dark background */
.page-index__main-title,
.page-index__brand-title,
.page-index__faq-main-title,
.page-index__blog-title,
.page-index__blog-item-date {
    color: var(--gold-color);
}

.page-index__faq-qtext,
.page-index__blog-item-title {
    color: var(--text-main);
}