:root {
    --primary-blue: #0066b3;
    --accent-red: #e63946;
    --dark-gray: #333333;
    --light-gray: #f5f5f5;
    --accent-yellow: #0066b3;
    --text-white: #FFFFFF;
    --overlay-dark: rgba(30, 35, 45, 0.85);
}

.hero-banner {
    position: relative;
    display: flex;
    align-items: center;
    background-image: url('https://images.unsplash.com/photo-1504328345606-18bbc8c9d7d1?w=1920&q=80');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--overlay-dark);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    color: var(--text-white);
}

.breadcrumb-nav {
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 2rem;
}

.breadcrumb-nav a {
    color: var(--text-white);
    text-decoration: none;
    transition: color 0.3s ease;
}

.breadcrumb-nav a:hover {
    color: #0066b3;
}

.text-block {
    border-left: 3px solid #0066b3;
    padding-left: 1.5rem;
}

.main-headline {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1.5rem;
}

.description-text {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    max-width: 700px;
}

.description-text strong {
    font-weight: 700;
}

.thumbnail-gallery {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.thumbnail-item {
    width: 140px;
    height: 80px;
    border-radius: 4px;
    overflow: hidden;
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.thumbnail-item:hover {
    transform: scale(1.05);
    border-color: #0066b3;
}

.thumbnail-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@media (max-width: 768px) {
    .main-headline {
        font-size: 1.75rem;
    }

    .description-text {
        font-size: 1rem;
    }

    .thumbnail-item {
        width: 100px;
        height: 60px;
    }
}

@media (max-width: 576px) {
    .hero-banner {
        min-height: auto;
        padding: 4rem 0;
    }

    .text-block {
        padding-left: 1rem;
    }

    .thumbnail-gallery {
        gap: 0.5rem;
    }

    .thumbnail-item {
        width: 80px;
        height: 50px;
    }
}

.spec-container {
    margin: 0 auto;
    background: #fff;
    border: 1px solid #ddd;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.spec-row {
    border-bottom: 1px solid #fff;
}
.spec-label {
    background-color: #0066b3;
    color: #fff;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}
.spec-value {
    background-color: #EFEFEF;
    color: #444;
    display: flex;
    align-items: center;
    padding-left: 1.5rem;
}
.spec-value-white {
    background-color: #FFFFFF;
    color: #444;
    display: flex;
    align-items: center;
    padding-left: 1.5rem;
}
.spec-row:last-child {
    border-bottom: none;
}
.section-title {
    color: var(--primary-blue);
    font-weight: bold;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: var(--primary-blue);
}

.content-section {
    padding: 3rem 0;
}

.mineral-grid img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 0.5rem;
}

.mineral-card {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
}

.mineral-card .overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--primary-blue);
    color: white;
    padding: 0.5rem;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 500;
}

.resource-card {
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    background: white;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.resource-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.resource-card i {
    font-size: 2rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.process-flow {
    background-color: var(--light-gray);
    padding: 3rem 0;
    border-radius: 8px;
}

.process-step {
    display: flex;
    align-items: center;
    padding: 1.5rem;
    background: white;
    border-radius: 8px;
    margin-bottom: 1rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary-blue);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    flex-shrink: 0;
}

.step-content h5 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.step-content p {
    margin-bottom: 0;
    color: #666;
}

.flow-diagram {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
}

.flow-item {
    display: inline-block;
    padding: 1rem 1.5rem;
    background: var(--primary-blue);
    color: white;
    border-radius: 8px;
    margin: 0.5rem;
    font-weight: 500;
}

.flow-arrow {
    display: inline-block;
    color: var(--primary-blue);
    font-size: 1.5rem;
    vertical-align: middle;
    margin: 0 0.5rem;
}

.feedback-section {
    background: linear-gradient(135deg, var(--primary-blue) 0%, #004a82 100%);
    color: white;
    padding: 3rem 0;
    border-radius: 8px;
}

.feedback-section blockquote {
    font-size: 1.2rem;
    font-style: italic;
    border-left: 4px solid white;
    padding-left: 1.5rem;
}

.related-products {
    padding: 3rem 0;
}

.product-card {
    border: 1px solid #eee;
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.product-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.product-card .card-body {
    padding: 1rem;
    text-align: center;
}

.product-card .card-title {
    color: var(--primary-blue);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0;
}

.related-cases {
    padding: 3rem 0;
    background-color: var(--light-gray);
}

.case-card {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.case-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.case-card:hover img {
    transform: scale(1.05);
}

.case-card .overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: white;
    padding: 1rem;
}

.case-card .location {
    font-size: 0.85rem;
    opacity: 0.8;
}

.case-card .project-name {
    font-weight: bold;
    font-size: 1rem;
}



.nav-link {
    color: #333;
    font-weight: 500;
    padding: 0.5rem 1rem;
}

.nav-link:hover {
    color: var(--primary-blue);
}

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

    .hero-image {
        height: 250px;
    }

    .stat-item {
        padding: 0.5rem;
    }

    .stat-value {
        font-size: 1.2rem;
    }
}