/* --- H-Lift Industrial Theme Variables --- */
    :root {
        --primary-color: #003366; /* Deep Navy Blue */
        --accent-color: #f39c12;  /* Safety Orange */
        --bg-light: #f4f7f6;
        --border-color: #e0e0e0;
        --text-dark: #333333;
        --text-light: #555555;
    }

    body {
        font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        color: var(--text-dark);
        line-height: 1.6;
        margin: 0;
        padding: 20px;
        background-color: #ffffff;
        font-size: 16px;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
    }

    /* --- Page Header --- */
    .page-header {
        border-bottom: 4px solid var(--primary-color);
        padding-bottom: 20px;
        margin-bottom: 40px;
        text-align: center;
    }

    .page-header h1 {
        color: var(--primary-color);
        font-size: 32px;
        margin: 0 0 10px 0;
        font-family: 'Cambria', serif;
    }

    .sub-header {
        color: var(--text-light);
        font-weight: 600;
        font-size: 18px;
    }

    /* --- Intro Section --- */
    .intro-box {
        background-color: var(--bg-light);
        padding: 20px;
        border-left: 5px solid var(--accent-color);
        margin-bottom: 40px;
        border-radius: 4px;
    }

    /* --- Feature Grid --- */
    .feature-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
        margin-bottom: 40px;
    }

    .feature-card {
        border: 1px solid var(--border-color);
        border-radius: 6px;
        padding: 20px;
        background: #fff;
        transition: transform 0.2s;
    }

    .feature-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    }

    .feature-title {
        font-weight: bold;
        color: var(--primary-color);
        font-size: 18px;
        margin-bottom: 10px;
        display: block;
        border-bottom: 2px solid #eee;
        padding-bottom: 5px;
    }

    /* --- Selection Guide Table --- */
    .guide-container {
        margin-bottom: 40px;
        border: 1px solid #e0e0e0;
        border-radius: 8px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.05);
        overflow: hidden;
    }

    .guide-header {
        background-color: var(--primary-color);
        color: #ffffff;
        padding: 15px 20px;
        font-size: 18px;
        font-weight: bold;
        text-align: center;
        border-bottom: 3px solid var(--accent-color);
    }

    .guide-table {
        width: 100%;
        border-collapse: collapse;
        font-size: 16px;
        background-color: #fff;
        min-width: 600px;
    }

    .table-wrapper {
        overflow-x: auto;
    }

    .guide-table th {
        background-color: #f4f7f6;
        color: #333;
        font-weight: 600;
        text-align: left;
        padding: 12px 15px;
        border-bottom: 2px solid #ddd;
    }

    .guide-table td {
        padding: 12px 15px;
        border-bottom: 1px solid #eee;
        color: #555;
        vertical-align: top;
    }

    .tag-safe { background-color: #e8f5e9; color: #2e7d32; padding: 2px 6px; border-radius: 4px; font-weight: bold; font-size: 12px; }
    .tag-danger { background-color: #ffebee; color: #c62828; padding: 2px 6px; border-radius: 4px; font-weight: bold; font-size: 12px; }

    /* --- Technical Specs Table --- */
    .spec-table th, .spec-table td {
        text-align: center;
        border: 1px solid var(--border-color);
        padding: 12px;
    }

    .spec-table thead th {
        background-color: var(--primary-color);
        color: #fff;
        font-weight: 600;
        vertical-align: middle;
    }

    /* --- Related Products --- */
    .products_box {
        margin-top: 50px;
    }

    .pub_title {
        font-size: 22px;
        color: var(--primary-color);
        border-left: 5px solid var(--accent-color);
        padding-left: 15px;
        margin-bottom: 25px;
    }

    .gallery-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 20px;
    }

    .gallery-item {
        border: 1px solid var(--border-color);
        border-radius: 8px;
        padding: 15px;
        text-align: center;
        transition: box-shadow 0.3s;
    }

    .gallery-item:hover {
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    }

    .gallery-item img {
        max-width: 100%;
        height: auto;
        margin-bottom: 10px;
    }

    .gallery-item a {
        text-decoration: none;
        color: var(--primary-color);
        font-weight: 600;
        font-size: 14px;
        display: block;
    }