* {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: Arial, sans-serif;
    }

    /* Core style variables: font size hierarchy + color scheme */
    :root {
        --primary-color: #FF7D00;    /* Main brand color (orange) */
        --primary-dark: #E67000;     /* Darker shade of primary color */
        --base-font-size: 16px;      /* Global base font size */
        --title-font-size: 36px;     /* Desktop section title size - prominent */
        --mobile-title-size: 28px;   /* Mobile section title size */
        --xs-title-size: 24px;       /* Extra small screen title size */
        --subtitle-font-size: 18px;  /* Feature card subtitle size */
        --mobile-subtitle-size: 16px;/* Mobile feature subtitle size */
        --light-gray: #f7f7f7;       /* Light gray background color */
        --table-even-bg: #FFF4EB;    /* Table even row background */
        --table-hover-bg: #FFE8D0;   /* Table row hover background */
        --text-dark: #222;           /* Main text color */
    }

    body {
        background: #fff;
        color: var(--text-dark);
        line-height: 1.7;
        font-size: var(--base-font-size);
    }

    /* Main content container - centered with max width + top alignment reset */
    .main-container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px;
        display: flex;
        flex-direction: column;
        align-items: flex-start; /* Ensure all child elements align to top */
        width: 100%;
    }

    /* Section title styling - TOP ALIGNED + bold prominent style */
    .section-title {
        font-size: var(--title-font-size);
        font-weight: bold;
        color: var(--primary-color);
        margin: 0 0 16px 0; /* REMOVED top margin for perfect top alignment */
        padding: 0 0 8px 0; /* Only bottom padding */
        border-bottom: 2px solid #eee;
        line-height: 1.2;
        width: 100%; /* Ensure full width */
        display: block; /* Force block display for alignment */
    }

    /* Add top margin to sections (not titles) for spacing between content blocks */
    .section-block {
        width: 100%;
        margin-top: 40px; /* Consistent spacing between sections */
    }

    /* Remove top margin from first section for absolute top alignment */
    .section-block:first-child {
        margin-top: 0;
    }

    /* Category/Product title styles (reserved for extended use) */
    .category-title {
        font-size: 32px;
        font-weight: bold;
        color: var(--primary-color);
        margin: 0 0 24px 0;
        border-left: 8px solid var(--primary-color);
        padding-left: 16px;
    }

    .product-title {
        font-size: 28px;
        font-weight: bold;
        color: var(--primary-color);
        margin: 0 0 8px 0;
        border-left: 6px solid var(--primary-color);
        padding-left: 15px;
    }

    .product-en-title {
        font-size: 18px;
        color: #333;
        margin-bottom: 16px;
        font-weight: 600;
    }

    /* Tag component styles (reserved for extended use) */
    .tags {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
        margin: 16px 0;
    }

    .tag {
        background: var(--primary-color);
        color: white;
        padding: 8px 16px;
        border-radius: 4px;
        font-size: 14px;
        font-weight: 600;
    }

    /* Product main image style (reserved for extended use) */
    .product-img {
        width: 100%;
        max-width: 700px;
        margin: 16px auto;
        display: block;
        border-radius: 8px;
        box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    }

    /* Product features section - light gray background with rounded corners */
    .product-features {
        background: var(--light-gray);
        padding: 32px 24px;
        border-radius: 10px;
        margin: 0; /* Remove margin - spacing handled by section-block */
        width: 100%;
    }

    /* Features grid layout: 2 columns on desktop, 1 column on mobile (FORCE) */
    .features-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr); /* 2 columns for desktop */
        gap: 25px; /* Spacing between feature cards */
    }

    /* Single feature card: horizontal layout (image left, text right) on desktop */
    .feature-card {
        display: flex;
        flex-direction: row; /* Horizontal layout for desktop */
        align-items: center; /* Vertically center content */
        background: white;
        padding: 25px;
        border-radius: 8px;
        box-shadow: 0 2px 8px rgba(0,0,0,0.06);
        border-top: 3px solid var(--primary-color);
        height: 100%; /* Ensure equal height for 2-column layout */
        gap: 25px; /* Spacing between image and text */
    }

    /* Feature image container: fixed width + 1:1 aspect ratio */
    .feature-img-wrapper {
        flex-shrink: 0; /* Prevent image from shrinking */
        width: 180px; /* Fixed width for consistency */
        aspect-ratio: 1/1; /* 1:1 square image */
        overflow: hidden;
        border-radius: 6px;
        box-shadow: 0 2px 6px rgba(0,0,0,0.08);
    }

    .feature-image {
        width: 100%;
        height: 100%;
        object-fit: cover; /* Maintain image aspect ratio */
    }

    /* Feature text area: take remaining width */
    .feature-text {
        flex: 1;
        line-height: 1.8;
        font-size: var(--base-font-size);
    }

    /* Feature card subtitle styling */
    .feature-card .feature-subtitle {
        color: var(--primary-color);
        font-size: var(--subtitle-font-size);
        display: block;
        margin-bottom: 10px;
        font-weight: bold;
    }

    /* Table wrapper - CRITICAL FIX: Combine table and note into one container */
    .table-wrapper {
        width: 100%;
        border-radius: 8px;
        overflow: hidden;
        box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        margin: 0; /* Remove margin - spacing handled by section-block */
    }

    /* Product parameters table: Optimized */
    .params-table {
        width: 100%;
        border-collapse: collapse;
        font-size: var(--base-font-size);
        table-layout: auto;
    }

    .params-table th,
    .params-table td {
        border: 1px solid #f0f0f0;
        padding: 12px 10px;
        text-align: center;
        white-space: nowrap;
        overflow: visible;
        text-overflow: clip;
        vertical-align: middle;
    }

    /* Optimized column width distribution */
    .params-table th:first-child {
        width: 25%;
        min-width: 180px;
    }
    .params-table td {
        width: 18.75%;
        min-width: 100px;
    }

    .params-table th {
        background: linear-gradient(to right, var(--primary-color), var(--primary-dark));
        color: white;
        font-weight: bold;
        font-size: calc(var(--base-font-size) + 1px);
    }

    /* Table row styling: zebra striping + hover effect */
    .params-table tr:nth-child(odd) {background-color: #fff;}
    .params-table tr:nth-child(even) {background-color: var(--table-even-bg);}
    .params-table tr:hover {
        background-color: var(--table-hover-bg);
        transition: background 0.3s ease;
    }

    /* Table note section - INTEGRATED with table (no separation) */
    .table-note {
        color: #888;
        font-size: calc(var(--base-font-size) - 2px);
        background-color: #fafafa;
        text-align: center;
        padding: 12px;
        border-top: 1px solid #f0f0f0; /* Connect with table */
        margin: 0; /* Remove margin to eliminate separation */
        width: 100%;
    }

    /* Application areas section: improved line height for readability */
    .application-areas {
        margin: 0; /* Remove margin - spacing handled by section-block */
        line-height: 1.8;
        font-size: var(--base-font-size);
        width: 100%;
    }

    /* Samples display: flexible layout for desktop, column for mobile */
    .samples-display {
        display: flex;
        flex-wrap: wrap;
        gap: 16px;
        margin: 0; /* Remove margin - spacing handled by section-block */
        width: 100%;
    }

    /* Sample card: equal height with centered content */
    .sample-card {
        flex: 1;
        min-width: 220px;
        background: var(--light-gray);
        padding: 20px;
        border-radius: 8px;
        text-align: center;
        font-weight: 600;
        font-size: var(--base-font-size);
        height: 100%;
    }

    /* Sample image container: 1:1 aspect ratio with max width */
    .sample-img-wrapper {
        width: 100%;
        aspect-ratio: 1/1; /* 1:1 square image */
        max-width: 200px;
        margin: 0 auto 10px;
        overflow: hidden;
        border-radius: 6px;
    }

    .sample-image {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
    }

    .sample-description {
        display: block;
        font-size: calc(var(--base-font-size) - 1px);
    }

    /* ====================== Mobile Responsive (≤768px) ====================== */
    @media (max-width: 768px) {
        .main-container {
            padding: 15px;
            overflow-x: auto;
            align-items: flex-start; /* Maintain top alignment on mobile */
        }

        /* Adjust section title size for mobile */
        .section-title {
            font-size: var(--mobile-title-size);
            margin: 0 0 15px 0;
            padding-bottom: 6px;
        }

        /* Adjust section spacing for mobile */
        .section-block {
            margin-top: 30px;
        }

        /* Force 1 column layout for features on mobile */
        .features-grid {
            grid-template-columns: 1fr !important;
            gap: 20px;
        }

        /* Change feature card to vertical layout (image top, text bottom) on mobile */
        .feature-card {
            flex-direction: column;
            text-align: center;
            padding: 20px 15px;
            gap: 20px;
        }

        /* Reduce feature image size for mobile */
        .feature-img-wrapper {
            width: 150px;
            margin-bottom: 10px;
        }

        /* Adjust feature subtitle size for mobile */
        .feature-card .feature-subtitle {
            font-size: var(--mobile-subtitle-size);
        }

        /* Reduce padding for features section on mobile */
        .product-features {
            padding: 25px 15px;
        }

        /* Table optimization for mobile */
        .table-wrapper {
            width: max-content;
            min-width: 100%;
        }
        
        .params-table {
            font-size: 14px;
            width: 100%;
        }
        
        .params-table th,
        .params-table td {
            padding: 10px 8px;
            white-space: nowrap !important;
            font-size: 14px;
        }

        /* Force 1 column layout for samples on mobile */
        .samples-display {
            flex-direction: column !important;
            gap: 15px;
        }

        /* Full width sample cards on mobile */
        .sample-card {
            min-width: 100% !important;
            padding: 20px 15px;
        }

        /* Reduce sample image size for mobile */
        .sample-img-wrapper {
            max-width: 180px;
        }

        /* Improve text readability on mobile */
        .application-areas {
            line-height: 1.7;
            font-size: 15px;
        }

        /* Adjust product title size for mobile */
        .category-title {
            font-size: 28px;
            margin: 0 0 16px 0;
        }
        .product-title {
            font-size: 24px;
        }
    }

    /* Extra small screen optimization (≤480px) */
    @media (max-width: 480px) {
        .section-title {
            font-size: var(--xs-title-size);
        }
        /* Further reduce feature image size for small screens */
        .feature-img-wrapper {
            width: 120px;
        }
        .sample-img-wrapper {
            max-width: 150px;
        }
        /* Further optimize table padding for small screens */
        .params-table th,
        .params-table td {
            padding: 8px 6px;
            font-size: 13px;
            white-space: nowrap !important;
        }
    }