:root {
    --bleu-fonce: #1a365d; --bleu-medium: #2c5282; --bleu-clair: #3182ce; --gris-fonce: #2d3748; --gris-medium: #4a5568; --gris-clair: #e2e8f0; --blanc: #ffffff; --accent: #ed8936; --gradient-primary: linear-gradient(135deg, #1a365d 0%, #3182ce 100%); --gradient-accent: linear-gradient(135deg, #ed8936 0%, #f6ad55 100%); --shadow-xl: 0 20px 40px rgba(0,0,0,0.15); --shadow-2xl: 0 25px 50px rgba(0,0,0,0.25);
}
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif; line-height: 1.6; color: var(--gris-fonce); background-color: #f8f9fa; padding-top: 80px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
section { padding: 4rem 0; }
.section-gray { background-color: #f8f9fa; }
h1 {font-size: 3rem; line-height: 1.2; }
h2 { font-size: 2.5rem; font-weight: 700; margin-bottom: 1.5rem; color: var(--bleu-fonce); text-align: center; position: relative; padding-bottom: 1rem; }
h2:after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 80px; height: 4px; background: var(--gradient-accent); border-radius: 2px; }
h3 { font-size: 1.75rem; font-weight: 600; margin-bottom: 1rem; color: var(--bleu-medium); }
.cta-button { background: var(--gradient-primary); color: var(--blanc); padding: 1rem 2rem; border-radius: 50px; text-decoration: none; font-weight: 600; transition: all 0.3s; display: inline-block; position: relative; overflow: hidden; box-shadow: 0 4px 15px rgba(49, 130, 206, 0.3); }
.cta-button:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(49, 130, 206, 0.4); }
.cta-in-content { background: var(--gradient-primary); border-radius: 15px; padding: 2rem; text-align: center; margin: 2rem 0; color: var(--blanc); box-shadow: 0 10px 30px rgba(49, 130, 206, 0.3); }
.cta-in-content h3 { color: inherit; font-size: 1.5rem; font-weight: 700; margin-bottom: 0.5rem; }
.cta-in-content .cta-button { background: var(--blanc); color: var(--bleu-fonce); margin-top: 1rem; box-shadow: 0 4px 15px rgba(0,0,0,0.2); }
.cta-in-content.cta-accent { background: var(--gradient-accent); }
.cta-in-content.cta-accent .cta-button { color: var(--accent); }
.link-card { background: #fff; border: 1px solid #e2e8f0; border-radius: 10px; box-shadow: 0 5px 15px rgba(0,0,0,.07); padding: 1.5rem; text-decoration: none; color: var(--gris-fonce); transition: all .2s; display: block; }
.link-card:hover { transform: translateY(-5px); box-shadow: 0 8px 25px rgba(0,0,0,.1); }
.header { background-color: rgba(255,255,255,.95); backdrop-filter: blur(10px); box-shadow: 0 2px 10px rgba(0,0,0,.1); position: fixed; width: 100%; top: 0; z-index: 1000; }
.header .container { display: flex; justify-content: space-between; align-items: center; padding: 1rem 20px; }
.logo { font-size: 1.5rem; font-weight: 700; text-decoration: none; color: var(--gris-fonce); }
.nav-links a { text-decoration: none; color: var(--gris-fonce); font-weight: 500; transition: color .3s; padding: 5px 10px; }
.nav-links a:hover { color: var(--bleu-clair); }
.footer { background-color: var(--gris-fonce); color: var(--blanc); padding: 4rem 20px 2rem; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 2.5rem; }
.footer-column h4 { font-size: 1.2rem; font-weight: 600; margin-bottom: 1.5rem; }
.footer-link { display: block; margin-bottom: 1rem; color: var(--gris-clair); text-decoration: none; }
.footer-link:hover { text-decoration: underline; }
.footer-bottom { border-top: 1px solid var(--gris-medium); margin-top: 3rem; padding-top: 2rem; text-align: center; }
.hero { position: relative; padding: 8rem 1.5rem 6rem; color: var(--blanc); text-align: center; overflow: hidden; min-height: 400px; display: flex; align-items: center; justify-content: center;}
.hero-image-wrapper { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 1; }
.hero-video-wrapper { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 1; overflow: hidden; }
.hero-video-wrapper video, .hero-image { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(26, 54, 93, 0.7); z-index: 2; }
.hero-content { position: relative; z-index: 3; }
.article-hero { min-height: 350px; padding: 5rem 1.5rem; }
.article-hero h1 { font-size: 2.5rem; }
.breadcrumbs { margin-bottom: 1rem; font-size: .9rem; color: var(--blanc); }
.breadcrumbs a { color: var(--blanc); text-decoration: none; opacity: 0.8; }
.breadcrumbs a:hover { text-decoration: underline; }
.breadcrumbs span { font-weight: 600; }
.services-grid { display: grid; gap: 1.5rem; margin-top: 3rem; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.service-card { background: var(--blanc); padding: 2.5rem; border-radius: 15px; box-shadow: 0 10px 30px rgba(0,0,0,.08); text-align: center; text-decoration: none; color: inherit; }
.service-card:hover { transform: translateY(-5px); box-shadow: 0 15px 35px rgba(0,0,0,.12); }
.service-icon { font-size: 3rem; line-height: 1; margin: 0 auto 1.5rem; }
.page-content { background: var(--blanc); padding: 3rem 2rem; margin-top: -4rem; border-radius: 15px; box-shadow: 0 15px 35px rgba(0,0,0,.1); position: relative; z-index: 10; }
.article-content { max-width: 900px; margin: 0 auto; }
.article-content p { margin-bottom: 1.5rem; line-height: 1.8; }
.article-content ul { list-style-position: inside; padding-left: 1rem; margin-bottom: 1.5rem; }
.article-content blockquote { border-left: 4px solid var(--accent); padding-left: 1.5rem; margin: 2rem 0; font-style: italic; color: var(--gris-medium); }
.article-body { background: var(--blanc); border-radius: 15px; padding: 2.5rem; margin: -5rem auto 0 auto; position: relative; z-index: 10; box-shadow: 0 15px 35px rgba(0,0,0,.1); max-width: 900px; }
.article-body a { color: var(--bleu-clair); font-weight: 600; }
.related-articles { margin-top: 3rem; }
.links-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.realisations-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 2.5rem; margin-top: 3rem; }
.realisation-card { position: relative; overflow: hidden; border-radius: 15px; box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
.realisation-card img { width: 100%; height: 300px; object-fit: cover; }
.realisation-info { position: absolute; bottom: 0; left: 0; right: 0; background: linear-gradient(to top, rgba(0,0,0,0.9), rgba(0,0,0,0.5), transparent); color: var(--blanc); padding: 3rem 1.5rem 1.5rem; }
.realisation-info h3 { color: var(--blanc); }
.testimonials-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(380px, 1fr)); gap: 2.5rem; margin-top: 3rem; justify-content: center;}
.testimonial-card { background: var(--blanc); padding: 2.5rem; border-radius: 15px; box-shadow: 0 10px 30px rgba(0,0,0,0.08); position: relative; }
.testimonial-header { display: flex; align-items: center; margin-bottom: 1.5rem; }
.testimonial-avatar { width: 70px; height: 70px; border-radius: 50%; background: var(--gradient-primary); margin-right: 1.5rem; display: flex; align-items: center; justify-content: center; color: var(--blanc); font-weight: 600; font-size: 1.2rem; }
.reassurance-section .container { max-width: 1200px; margin: 0 auto; }
.reassurance-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 2rem; text-align: center; }
.reassurance-item svg { width: 48px; height: 48px; color: var(--accent); margin-bottom: 1rem; }
.reassurance-cta { text-align: center; margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--gris-clair); }
.contact-form { max-width: 700px; margin: 3rem auto 0; background: var(--blanc); padding: 3rem; border-radius: 20px; box-shadow: 0 15px 40px rgba(0,0,0,0.1); }
.form-group { margin-bottom: 2rem; }
.form-group label { display: block; margin-bottom: 0.75rem; font-weight: 600; }
.form-group input, .form-group textarea { width: 100%; padding: 1rem; border: 2px solid var(--gris-clair); border-radius: 10px; font-size: 1rem; }
.form-submit-button { background: var(--accent); color: var(--blanc); padding: 1.2rem 3rem; border: none; border-radius: 50px; font-size: 1.1rem; font-weight: 600; cursor: pointer; width: 100%; }
.partners-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; }
.partner-card { background: var(--blanc); padding: 2rem; border-radius: 15px; box-shadow: 0 10px 30px rgba(0,0,0,0.08); text-decoration: none; color: inherit; }
.partner-card:hover h3 { color: var(--accent); }
.final-cta { background: var(--gradient-primary); color: var(--blanc); padding: 5rem 1.5rem; text-align: center; }
.mobile-menu-button { display: none; }
.sub-services-grid .card { background: #fff; border-radius: 15px; overflow: hidden; box-shadow: 0 10px 30px rgba(0,0,0,0.08); text-decoration: none; color: inherit; display: flex; flex-direction: column; transition: all 0.3s ease; }
.sub-services-grid .card:hover { transform: translateY(-8px); box-shadow: 0 18px 40px rgba(0,0,0,0.12); }
.sub-services-grid .card img { height: 220px; object-fit: cover; }
.sub-services-grid .card-content { padding: 1.5rem; flex-grow: 1; display: flex; flex-direction: column; }
.sub-services-grid .card-content h4 { margin-bottom: 0.5rem; font-size: 1.25rem; color: var(--bleu-medium); }
.sub-services-grid .card-content p { font-size: 0.95rem; color: var(--gris-medium); flex-grow: 1; margin-bottom: 1.5rem; }
.sub-services-grid .card-content .card-link { display: inline-block; margin-top: auto; font-weight: 600; color: var(--accent); text-decoration: none; }
.sub-services-grid .card-content .card-link:after { content: ' →'; }
.related-article-card { background: #fff; border-radius: 15px; box-shadow: 0 10px 20px rgba(0,0,0,0.05); text-decoration: none; color: inherit; display: flex; flex-direction: column; overflow: hidden; transition: all 0.3s ease; }
.related-article-card:hover { transform: translateY(-8px); box-shadow: 0 15px 30px rgba(0,0,0,0.1); }
.related-article-card img { height: 180px; object-fit: cover; }
.related-article-content { padding: 1.5rem; display: flex; flex-direction: column; flex-grow: 1; }
.related-article-title { font-size: 1.2rem; font-weight: 600; color: var(--bleu-medium); margin-bottom: 0.75rem; }
.related-article-description { font-size: 0.9rem; color: var(--gris-medium); flex-grow: 1; margin-bottom: 1rem; line-height: 1.5; }
.related-article-link { font-weight: 600; color: var(--accent); margin-top: auto; align-self: flex-start; }
.responsive-video-container { position: relative; overflow: hidden; width: 100%; padding-top: 56.25%; border-radius: 15px; box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
.responsive-video-container iframe, .responsive-video-container video { position: absolute; top: 0; left: 0; bottom: 0; right: 0; width: 100%; height: 100%; }
.article-content .table-container { overflow-x: auto; margin: 2rem 0; border: 1px solid var(--gris-clair); border-radius: 10px; }
.article-content table { width: 100%; border-collapse: collapse; min-width: 600px; }
.article-content th, .article-content td { padding: 1rem; border: 1px solid var(--gris-clair); text-align: left; }
.article-content th { background-color: #f8f9fa; font-weight: 600; }
.in-article-figure img { width: 100%; height: auto; object-fit: cover; border-radius: 10px; }
@media(max-width: 768px) { .nav-links { display: none; } .mobile-menu-button { display: block; } }