/* --- Base & Typography --- */
:root {
    --industrial-blue: #002855;
    --industrial-blue-light: #0a4a8f;
    --industrial-blue-hover: #003d80;
    --accent-silver: #f4f6f8;
    --text-dark: #1a1a1a;
    --text-gray: #555555;
    --border-color: #dce1e6;
    --light-gray: #f8f9fa;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-dark);
    line-height: 1.8;
    margin: 0;
    padding: 0;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
}

/* --- Hero Section --- */
.hero-industrial {
    position: relative;
    background-color: #fff;
    padding: 5rem 0;
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    gap: 3rem;
}

.hero-content {
    flex: 1;
}

.hero-tag {
    display: inline-block;
    color: var(--industrial-blue);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    padding: 0.5rem 1rem;
    background-color: var(--light-gray);
    border-radius: 4px;
}

.hero-title {
    color: var(--text-dark);
    font-size: 36px;
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 1.5rem;
}

.hero-desc {
    color: var(--text-gray);
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-image {
    flex: 1;
    max-width: 746px;
}

.hero-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.inquiry-form {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.inquiry-form h3 {
    font-size: 1.4rem;
    color: var(--industrial-blue);
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.inquiry-form .form-control {
    background-color: #f9f9f9;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.65rem 0.8rem;
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.inquiry-form .form-control:focus {
    background-color: #fff;
    border-color: var(--industrial-blue);
    box-shadow: 0 0 0 0.2rem rgba(0, 40, 85, 0.15);
}

.btn-submit {
    background-color: var(--industrial-blue);
    color: #fff;
    font-weight: 600;
    padding: 0.7rem;
    width: 100%;
    border: none;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: background-color 0.3s;
}

.btn-submit:hover {
    background-color: var(--industrial-blue-hover);
    color: #fff;
}

/* --- Common Section Styles --- */
.section-padding {
    padding: 5rem 0;
}

.section-bg {
    background-color: var(--accent-silver);
}

.section-title {
    color: var(--industrial-blue);
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--industrial-blue);
}

.section-subtitle {
    color: var(--text-gray);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 3rem auto;
    line-height: 1.7;
}

/* --- Module 2: Applications & Material Requirements --- */
.app-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    transition: all 0.3s ease;
    height: 100%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.app-card:hover {
    box-shadow: 0 10px 25px rgba(0, 40, 85, 0.1);
    transform: translateY(-5px);
}

.app-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.app-body {
    padding: 1.8rem;
}

.app-body h4 {
    color: var(--industrial-blue);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.app-body p {
    font-size: 0.95rem;
    color: var(--text-gray);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.app-body .keywords {
    font-size: 0.85rem;
    color: var(--industrial-blue);
    font-weight: 500;
    background-color: var(--light-gray);
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    display: inline-block;
    margin-top: 0.5rem;
}

.material-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 2rem;
    height: 100%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.material-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--industrial-blue);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.material-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.material-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.6;
}

.material-list li::before {
    content: '\2022';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--industrial-blue);
    font-weight: bold;
    font-size: 1.2rem;
}

/* --- Module 3: Capabilities & Testing --- */
.cap-test-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 2rem;
    height: 100%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.cap-test-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--industrial-blue);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    margin-bottom: 1rem;
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.6;
}

.feature-list li i {
    color: var(--industrial-blue);
    font-size: 1.1rem;
    margin-top: 3px;
    flex-shrink: 0;
}

.feature-list li strong {
    color: var(--text-dark);
    font-weight: 600;
}

.solution-card {
    background: #fff;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, .08);

    height: 100%;

    display: flex;
    flex-direction: column;

    transition: .3s;
}

.solution-card:hover {
    transform: translateY(-8px);
}

.solution-card p {
    flex-grow: 1;
}

.solution-card h3 {
    font-size: 28px;
    margin-bottom: 20px;
}

.solution-card h5 {
    margin-top: 25px;
    margin-bottom: 15px;
    color: var(--e-global-color);
}

.solution-card ul {
    min-height: 150px;
    padding-left: 18px;
}

.solution-card li {
    margin-bottom: 10px;
}

.solution-card img {
    height: 280px;
    width: 100%;
    object-fit: cover;
}

.solution-card .btn {
    margin-top: auto;
}





.guide-card {
    background: #fff;
    border-radius: 16px;
    padding: 30px;
    height: 100%;
    border: 1px solid #e9ecef;
    transition: all .3s ease;
}

.guide-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 40px rgba(0,0,0,.08);
}

.guide-icon {
    width: 65px;
    height: 65px;
    background: #eef5ff;
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 20px;
}

.guide-card h3 {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: #031D61;
}

.guide-card p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 18px;
}

.guide-card ul {
    padding-left: 18px;
    margin-bottom: 0;
}

.guide-card li {
    margin-bottom: 10px;
    color: #555;
}

#design-guide table th {
    background: #031D61;
    color: #fff;
    text-align: center;
}

#design-guide table td {
    vertical-align: middle;
}

/* --- Module 5: Quality Assurance --- */
.quality-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 2rem;
    height: 100%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.quality-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--industrial-blue);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.quality-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.quality-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    margin-bottom: 1rem;
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.6;
}

.quality-list li i {
    color: var(--industrial-blue);
    font-size: 1.1rem;
    margin-top: 3px;
    flex-shrink: 0;
}

.quality-list li strong {
    color: var(--text-dark);
    font-weight: 600;
}

/* --- Module 6: FAQ --- */
.faq-section .accordion-item {
    border: 1px solid var(--border-color);
    margin-bottom: 1rem;
    border-radius: 6px !important;
}

.faq-section .accordion-button {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--industrial-blue);
    box-shadow: none;
    padding: 1.2rem 1.5rem;
}

.faq-section .accordion-button:not(.collapsed) {
    background-color: #fff;
    color: var(--industrial-blue);
}

.faq-section .accordion-button::after {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23002855'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
}

.faq-section .accordion-body {
    color: var(--text-gray);
    font-size: 0.95rem;
    padding: 1.2rem 1.5rem 1.5rem;
    line-height: 1.7;
}

/* --- Module 7: CTA & Footer --- */
.cta-section {
    background-color: var(--industrial-blue);
    color: #fff;
    padding: 5rem 0;
    text-align: center;
}

.cta-section h2 {
    font-weight: 700;
    margin-bottom: 1.5rem;
    font-size: 2.2rem;
}

.btn-cta {
    background-color: #fff;
    color: var(--industrial-blue);
    font-weight: 700;
    padding: 0.9rem 3rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: none;
    font-size: 1.1rem;
    transition: background-color 0.3s;
}

.btn-cta:hover {
    background-color: #e6f0fa;
    color: var(--industrial-blue);
}

.footer-kaweei {
    background-color: #001a3a;
    color: rgba(255, 255, 255, 0.6);
    padding: 3rem 0;
    font-size: 0.9rem;
    text-align: center;
}

.footer-kaweei .container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer-logo {
    font-weight: 700;
    color: #fff;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.footer-content {
    max-width: 600px;
    line-height: 1.6;
}

/* --- Responsive --- */
@media (max-width: 992px) {
    .hero-container {
        flex-direction: column;
        gap: 2.5rem;
    }

    .hero-image {
        max-width: 100%;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .inquiry-form {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 1.8rem;
    }

    .hero-desc {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }
}