:root {
        --color-text: #222;
        --color-heading: #1a1a1a;
        --color-border: #e0e0e0;
        --color-card-border: #e8e8e8;
        --color-bg-light: #f8f8f8;
        --color-bg-img: #f5f5f5;
        --color-white: #fff;
        --color-border-hover: #ccc;
        --color-icon: #888;
        --color-shadow: rgba(0, 0, 0, 0.04);
        --font-family: 'Poppins', sans-serif;
        --radius: 6px;
        --shadow-card: 0 4px 12px var(--color-shadow);
        --transition: 0.2s ease;
        --max-width: 1440px;
        --gap-lg: 50px;
        --gap-md: 30px;
        --gap-sm: 20px;
    }

    *,
    *::before,
    *::after {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: var(--font-family);
        font-weight: 400;
        font-size: 16px;
        line-height: 1.6;
        color: var(--color-text);
        background: var(--color-white);
        -webkit-font-smoothing: antialiased;
    }

    .page-wrap {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 40px 24px 60px;
    }

    h2 {
        font-family: var(--font-family);
        font-weight: 700;
        font-size: 28px;
        line-height: 1.3;
        color: var(--color-heading);
        margin: 0 0 12px 0;
        letter-spacing: -0.01em;
    }

    h3 {
        font-family: var(--font-family);
        font-weight: 400;
        font-size: 20px;
        line-height: 1.4;
        color: var(--color-heading);
        margin: 0 0 10px 0;
    }

    p {
        font-family: var(--font-family);
        font-size: 16px;
        line-height: 1.7;
        color: var(--color-text);
        margin: 0 0 14px 0;
    }

    .module {
        margin-bottom: 60px;
    }

    .module:last-child {
        margin-bottom: 0;
    }

    /* Structure */
    .structure-wrap {
        display: flex;
        flex-wrap: wrap;
        align-items: flex-start;
        gap: 40px var(--gap-lg);
    }

    .structure-text {
        flex: 1 1 52%;
        min-width: 280px;
    }

    .structure-text .layer {
        margin-bottom: 20px;
    }

    .structure-text .layer:last-child {
        margin-bottom: 0;
    }

    .structure-text .layer h3 {
        font-size: 18px;
        font-weight: 400;
        margin-bottom: 6px;
    }

    .structure-text .layer p {
        margin-bottom: 0;
    }

    .structure-image {
        flex: 0 1 38%;
        min-width: 240px;
    }

    .structure-image img {
        width: 100%;
        max-width: 420px;
        display: block;
        border-radius: var(--radius);
        background: var(--color-bg-img);
    }

    /* Specifications */
    .spec-table-wrap {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin-top: 6px;
        border-radius: var(--radius);
    }

    .spec-table {
        width: 100%;
        border-collapse: collapse;
        font-size: 16px;
        background: var(--color-white);
    }

    .spec-table thead th {
        padding: 12px 18px;
        text-align: left;
        font-weight: 700;
        background: var(--color-bg-light);
        border-bottom: 2px solid var(--color-border);
        color: var(--color-heading);
    }

    .spec-table td,
    .spec-table th {
        padding: 12px 18px;
        border: 1px solid var(--color-border);
        vertical-align: middle;
        text-align: left;
    }

    .spec-table .label-cell {
        font-weight: 700;
        background: var(--color-bg-light);
        width: 32%;
        min-width: 140px;
    }

    /* Features */
    .features-text ul {
        list-style: disc;
        padding-left: 20px;
        margin: 0;
    }

    .features-text ul li {
        font-size: 16px;
        line-height: 1.7;
        color: var(--color-text);
        margin-bottom: 4px;
        padding: 0;
    }

    /* Applications */
    .app-intro {
        margin-bottom: 28px;
    }

    .app-intro p {
        margin-bottom: 0;
    }

    .app-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--gap-md);
        margin-top: 10px;
    }

    .app-card {
        background: var(--color-white);
        border: 1px solid var(--color-card-border);
        border-radius: var(--radius);
        padding: 20px 20px 18px;
        display: flex;
        flex-direction: column;
        transition: box-shadow var(--transition), transform var(--transition);
    }

    .app-card:hover {
        box-shadow: var(--shadow-card);
        transform: translateY(-2px);
    }

    .app-card .app-img {
        width: 100%;
        aspect-ratio: 4 / 3;
        object-fit: cover;
        display: block;
        border-radius: 4px;
        background: var(--color-bg-img);
        margin-bottom: 14px;
        transition: transform 0.3s ease;
    }

    .app-card:hover .app-img {
        transform: scale(1.01);
    }

    .app-card h3 {
        font-size: 19px;
        font-weight: 400;
        margin-bottom: 6px;
        color: var(--color-heading);
    }

    .app-card .desc {
        margin-bottom: 10px;
    }

    .app-card .app-list {
        flex-shrink: 0;
    }

    .app-card .app-list p {
        margin-bottom: 2px;
        font-size: 15px;
        font-weight: 400;
        color: var(--color-heading);
    }

    .app-card .app-list ul {
        list-style: disc;
        padding-left: 20px;
        margin: 4px 0 0;
    }

    .app-card .app-list ul li {
        font-size: 15px;
        line-height: 1.8;
        color: var(--color-text);
        margin-bottom: 0;
    }

    /* Factory */
    .factory-wrap {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 40px var(--gap-lg);
    }

    .factory-text {
        flex: 1 1 42%;
        min-width: 260px;
        display: flex;
        flex-direction: column;
    }

    .factory-text h3 {
        font-weight: 400;
        margin-bottom: 12px;
    }

    .factory-text p {
        margin-bottom: 14px;
    }

    .factory-text ul {
        list-style: disc;
        padding-left: 20px;
        margin: 4px 0 10px;
    }

    .factory-text ul li {
        font-size: 16px;
        line-height: 1.7;
        margin-bottom: 2px;
    }

    .factory-text ul li:last-child {
        margin-bottom: 0;
    }

    .factory-gallery {
        flex: 1 1 48%;
        min-width: 280px;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .factory-gallery img {
        width: 100%;
        height: auto;
        aspect-ratio: 4 / 3;
        display: block;
        border-radius: var(--radius);
        background: var(--color-bg-img);
        object-fit: cover;
        transition: transform 0.3s ease;
    }

    .factory-gallery img:hover {
        transform: scale(1.02);
    }

    /* =========================================
       Product Inspection
       5 images in one horizontal row
       ========================================= */

    .inspection-wrap {
        display: flex;
        flex-direction: column;
        gap: 24px;
    }

    .inspection-text {
        width: 100%;
        order: 1;
    }

    .inspection-text p {
        margin-bottom: 0;
    }

    .inspection-gallery {
        width: 100%;
        display: grid;
        grid-template-columns: repeat(5, minmax(0, 1fr));
        gap: 12px;
        order: 2;
    }

    .inspection-card {
        margin: 0;
        min-width: 0;
    }

    .inspection-gallery img {
        width: 100%;
        height: auto;
        aspect-ratio: 4 / 3;
        display: block;
        border-radius: var(--radius);
        background: var(--color-bg-img);
        object-fit: cover;
        transition: transform 0.3s ease;
    }

    .inspection-gallery img:hover {
        transform: scale(1.02);
    }

    .inspection-caption {
        margin-top: 7px;
        margin-bottom: 0;
        font-size: 14px;
        line-height: 1.45;
        color: var(--color-heading);
    }


    /* =========================================
       Container Loading & Shipment
       4 images in one horizontal row
       ========================================= */

    .shipment-wrap {
        display: flex;
        flex-direction: column;
        gap: 24px;
    }

    .shipment-text {
        width: 100%;
        order: 1;
    }

    .shipment-text p {
        margin-bottom: 0;
    }

    .shipment-gallery {
        width: 100%;
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 12px;
        order: 2;
    }

    .shipment-card {
        margin: 0;
        min-width: 0;
    }

    .shipment-gallery img {
        width: 100%;
        height: auto;
        aspect-ratio: 4 / 3;
        display: block;
        border-radius: var(--radius);
        background: var(--color-bg-img);
        object-fit: cover;
        transition: transform 0.3s ease;
    }

    .shipment-gallery img:hover {
        transform: scale(1.02);
    }

    .shipment-caption {
        margin-top: 7px;
        margin-bottom: 0;
        font-size: 14px;
        line-height: 1.45;
        color: var(--color-heading);
    }


    /* FAQ */
    .faq-list {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .faq-item {
        border: 1px solid var(--color-card-border);
        border-radius: var(--radius);
        background: var(--color-white);
        overflow: hidden;
        transition: border-color var(--transition);
    }

    .faq-item:hover {
        border-color: var(--color-border-hover);
    }

    .faq-item summary {
        font-weight: 700;
        font-size: 16px;
        padding: 16px 20px;
        cursor: pointer;
        list-style: none;
        display: flex;
        align-items: center;
        justify-content: space-between;
        transition: background 0.15s ease;
        user-select: none;
        color: var(--color-heading);
    }

    .faq-item summary::-webkit-details-marker {
        display: none;
    }

    .faq-item summary::after {
        content: "\25B8";
        font-size: 20px;
        line-height: 1;
        color: var(--color-icon);
        transition: transform 0.25s ease;
        margin-left: 12px;
        flex-shrink: 0;
    }

    .faq-item[open] summary::after {
        transform: rotate(90deg);
    }

    .faq-item summary:hover {
        background: var(--color-bg-light);
    }

    .faq-item .faq-answer {
        padding: 0 20px 18px 20px;
        font-size: 16px;
        line-height: 1.7;
        color: var(--color-text);
    }

    .faq-item .faq-answer p {
        margin-bottom: 0;
    }


    /* =========================================
       Responsive
       ========================================= */

    @media (max-width: 1200px) {

        .inspection-gallery {
            grid-template-columns: repeat(5, minmax(130px, 1fr));
            overflow-x: auto;
            padding-bottom: 6px;
        }

        .shipment-gallery {
            grid-template-columns: repeat(4, minmax(160px, 1fr));
            overflow-x: auto;
            padding-bottom: 6px;
        }

        .inspection-card,
        .shipment-card {
            min-width: 130px;
        }
    }


    @media (max-width: 992px) {

        .page-wrap {
            padding: 32px 20px 48px;
        }

        .structure-wrap,
        .factory-wrap {
            gap: var(--gap-md);
        }

        .factory-gallery {
            gap: 10px;
        }

        .app-grid {
            grid-template-columns: repeat(2, 1fr);
        }

        .inspection-gallery {
            grid-template-columns: repeat(5, minmax(125px, 1fr));
            gap: 10px;
        }

        .shipment-gallery {
            grid-template-columns: repeat(4, minmax(150px, 1fr));
            gap: 10px;
        }
    }


    @media (max-width: 768px) {

        .page-wrap {
            padding: 24px 16px 40px;
        }

        h2 {
            font-size: 24px;
            margin-bottom: 10px;
        }

        h3 {
            font-size: 18px;
        }

        .structure-wrap {
            flex-direction: column;
            gap: 24px;
        }

        .structure-text,
        .structure-image {
            flex: 1 1 auto;
            min-width: 0;
            width: 100%;
        }

        .structure-image img {
            max-width: 100%;
        }

        .factory-wrap {
            flex-direction: column;
            align-items: stretch;
            gap: 24px;
        }

        .factory-text {
            flex: 1 1 auto;
            min-width: 0;
            width: 100%;
        }

        .factory-gallery {
            flex: 1 1 auto;
            min-width: 0;
            width: 100%;
            gap: 8px;
        }

        .factory-gallery img {
            aspect-ratio: 4 / 3;
        }

        .app-grid {
            grid-template-columns: 1fr;
            gap: var(--gap-sm);
        }

        .spec-table-wrap {
            border-radius: var(--radius);
        }

        .spec-table td,
        .spec-table th {
            padding: 10px 14px;
            font-size: 15px;
        }

        .spec-table .label-cell {
            min-width: 100px;
            width: 28%;
        }

        /*
         * Mobile:
         * Keep inspection and shipment images horizontal.
         * User can swipe left/right.
         */

        .inspection-gallery {
            display: flex;
            flex-wrap: nowrap;
            overflow-x: auto;
            gap: 10px;
            width: 100%;
            padding-bottom: 8px;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
        }

        .inspection-card {
            flex: 0 0 150px;
        }

        .inspection-gallery img {
            aspect-ratio: 4 / 3;
        }

        .shipment-gallery {
            display: flex;
            flex-wrap: nowrap;
            overflow-x: auto;
            gap: 10px;
            width: 100%;
            padding-bottom: 8px;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
        }

        .shipment-card {
            flex: 0 0 180px;
        }

        .shipment-gallery img {
            aspect-ratio: 4 / 3;
        }
    }


    @media (max-width: 480px) {

        .page-wrap {
            padding: clamp(14px, 4vw, 18px) clamp(10px, 3vw, 12px) 32px;
        }

        h2 {
            font-size: 20px;
            margin-bottom: 8px;
        }

        h3 {
            font-size: 16px;
        }

        .spec-table td,
        .spec-table th {
            padding: 8px 10px;
            font-size: 14px;
        }

        .spec-table .label-cell {
            min-width: 80px;
            width: 26%;
        }

        .factory-gallery {
            gap: 6px;
        }

        .structure-wrap,
        .factory-wrap {
            gap: 18px;
        }

        .module {
            margin-bottom: 40px;
        }

        .faq-item summary {
            padding: 14px 16px;
            font-size: 15px;
        }

        .faq-item .faq-answer {
            padding: 0 16px 14px 16px;
            font-size: 15px;
        }

        .app-card {
            padding: 16px 16px 14px;
        }

        .app-card .app-img {
            aspect-ratio: 16 / 9;
        }

        .inspection-card {
            flex: 0 0 145px;
        }

        .shipment-card {
            flex: 0 0 165px;
        }

        .inspection-caption,
        .shipment-caption {
            font-size: 13px;
        }
    }