:root {
      --primary: #0d2f4a;
      --primary-2: #174b74;
      --accent: #2f7dbb;
      --dark: #091d2d;
      --text: #12202e;
      --muted: #5d6b78;
      --bg: #f4f7fa;
      --surface: #ffffff;
      --line: #dde6ee;
      --soft: #eef4f9;
      --success: #198754;
      --shadow: 0 18px 46px rgba(13, 47, 74, 0.10);
      --shadow-soft: 0 10px 24px rgba(13, 47, 74, 0.06);
      --radius-xl: 28px;
      --radius-lg: 22px;
      --radius-md: 16px;
      --container: 1240px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: Arial, Helvetica, sans-serif;
      color: var(--text);
      background: var(--bg);
      line-height: 1.6;
    }

    img {
      max-width: 100%;
      display: block;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    p a,
    li a,
    .content a,
    .faq-item a,
    .text-block a {
      color: var(--accent);
      font-weight: 700;
      text-decoration: underline;
    }

    p a:hover,
    li a:hover,
    .content a:hover,
    .faq-item a:hover,
    .text-block a:hover {
      color: var(--primary);
    }

    .container {
      width: min(100% - 32px, var(--container));
      margin: 0 auto;
    }

    .topbar {
      background: var(--dark);
      color: #fff;
      font-size: 14px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }

    .topbar-inner {
      min-height: 46px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
    }

    .topbar a {
      color: #fff;
      font-weight: 700;
    }

    header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255,255,255,0.96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(10px);
    }

    .nav {
      min-height: 82px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

    .logo {
      display: inline-flex;
      align-items: center;
      gap: 14px;
      font-size: 24px;
      font-weight: 900;
      color: var(--primary);
      letter-spacing: -0.02em;
    }

    .logo-mark {
      width: 44px;
      height: 44px;
      border-radius: 14px;
      background: linear-gradient(135deg, var(--primary), var(--primary-2));
      position: relative;
      box-shadow: var(--shadow-soft);
    }

    .logo-mark::before,
    .logo-mark::after {
      content: "";
      position: absolute;
      background: rgba(255,255,255,0.96);
      border-radius: 999px;
    }

    .logo-mark::before {
      width: 20px;
      height: 4px;
      top: 13px;
      left: 12px;
    }

    .logo-mark::after {
      width: 14px;
      height: 4px;
      top: 24px;
      left: 15px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 22px;
      flex-wrap: wrap;
    }

    .nav-links a {
      font-size: 15px;
      font-weight: 700;
      color: var(--text);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      min-height: 52px;
      padding: 0 22px;
      border-radius: 999px;
      font-weight: 800;
      border: 1px solid transparent;
      transition: 0.25s ease;
      text-decoration: none !important;
      cursor: pointer;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--primary-2));
      color: #fff;
      box-shadow: 0 16px 36px rgba(13, 47, 74, 0.20);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      color: #fff;
      filter: brightness(1.02);
    }

    .btn-secondary {
      background: #fff;
      color: var(--primary);
      border-color: var(--line);
    }

    .btn-secondary:hover {
      background: var(--soft);
      transform: translateY(-2px);
    }

    .hero {
      background:
        linear-gradient(90deg, rgba(9,29,45,0.88), rgba(13,47,74,0.78)),
        url("https://images.unsplash.com/photo-1497366754035-f200968a6e72?auto=format&fit=crop&w=1800&q=80") center/cover no-repeat;
      color: #fff;
      padding: 44px 0 92px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 30px;
      align-items: stretch;
    }

    .hero-left {
      padding: 48px 0;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      width: fit-content;
      padding: 10px 16px;
      border-radius: 999px;
      background: rgba(255,255,255,0.10);
      border: 1px solid rgba(255,255,255,0.18);
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      margin-bottom: 22px;
    }

    .hero h1 {
      margin: 0 0 18px;
      font-size: clamp(38px, 5.5vw, 68px);
      line-height: 1.02;
      letter-spacing: -0.04em;
      max-width: 760px;
    }

    .hero-lead {
      margin: 0 0 26px;
      max-width: 760px;
      font-size: 18px;
      color: rgba(255,255,255,0.92);
    }

    .hero-lead a {
      color: #fff;
      text-decoration: underline;
      font-weight: 800;
    }

    .hero-actions {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
      margin-bottom: 30px;
    }

    .trust-row {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 14px;
      max-width: 760px;
    }

    .trust-card {
      background: rgba(255,255,255,0.10);
      border: 1px solid rgba(255,255,255,0.14);
      border-radius: 18px;
      padding: 18px;
      backdrop-filter: blur(6px);
    }

    .trust-card strong {
      display: block;
      font-size: 20px;
      margin-bottom: 6px;
      color: #fff;
    }

    .trust-card span {
      color: rgba(255,255,255,0.86);
      font-size: 14px;
    }

    .hero-form {
      background: rgba(255,255,255,0.98);
      color: var(--text);
      border-radius: var(--radius-xl);
      padding: 32px;
      box-shadow: var(--shadow);
      align-self: center;
    }

    .hero-form h2 {
      margin: 0 0 8px;
      font-size: 30px;
      color: var(--primary);
      line-height: 1.1;
    }

    .hero-form p {
      margin: 0 0 20px;
      color: var(--muted);
      font-size: 15px;
    }

    .form-grid {
      display: grid;
      gap: 14px;
    }

    .field input,
    .field select,
    .field textarea {
      width: 100%;
      border: 1px solid var(--line);
      border-radius: 16px;
      padding: 15px 16px;
      font-size: 15px;
      font-family: inherit;
      outline: none;
      background: #f9fbfd;
      color: var(--text);
      transition: 0.2s ease;
    }

    .field input:focus,
    .field select:focus,
    .field textarea:focus {
      background: #fff;
      border-color: rgba(47, 125, 187, 0.45);
      box-shadow: 0 0 0 4px rgba(47, 125, 187, 0.10);
    }

    .form-note {
      margin-top: 14px;
      font-size: 13px;
      color: var(--muted);
    }

    .section {
      padding: 88px 0;
    }

    .section-white {
      background: #fff;
    }

    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 52px;
    }

    .eyebrow {
      display: inline-block;
      margin-bottom: 12px;
      color: var(--accent);
      font-size: 12px;
      font-weight: 900;
      letter-spacing: 0.10em;
      text-transform: uppercase;
    }

    .section-header h2 {
      margin: 0 0 14px;
      font-size: clamp(32px, 4vw, 50px);
      line-height: 1.08;
      letter-spacing: -0.04em;
      color: var(--primary);
    }

    .section-header p {
      margin: 0;
      color: var(--muted);
      font-size: 17px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 22px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .service-card,
    .network-card,
    .proof-card {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 24px;
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      transition: 0.25s ease;
    }

    .service-card:hover,
    .network-card:hover,
    .proof-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow);
    }

    .service-card img,
    .network-card img {
      width: 100%;
      height: 210px;
      object-fit: cover;
    }

    .card-body {
      padding: 24px;
    }

    .card-body h3 {
      margin: 0 0 10px;
      font-size: 22px;
      color: var(--primary);
      line-height: 1.18;
    }

    .card-body p {
      margin: 0 0 14px;
      color: var(--muted);
      font-size: 15px;
    }

    .card-body ul {
      margin: 0;
      padding-left: 18px;
      color: var(--text);
      font-size: 14px;
    }

    .proof-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    .proof-card {
      padding: 24px;
      text-align: center;
    }

    .proof-card strong {
      display: block;
      font-size: 34px;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 8px;
      letter-spacing: -0.04em;
    }

    .split {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 34px;
      align-items: center;
    }

    .visual {
      position: relative;
    }

    .visual img {
      width: 100%;
      min-height: 560px;
      object-fit: cover;
      border-radius: 30px;
      box-shadow: var(--shadow);
    }

    .stat-float {
      position: absolute;
      right: -18px;
      bottom: 28px;
      width: min(310px, 86%);
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 24px;
      padding: 24px;
      box-shadow: var(--shadow);
    }

    .stat-float strong {
      display: block;
      font-size: 38px;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 8px;
      letter-spacing: -0.04em;
    }

    .content h2 {
      margin: 0 0 18px;
      font-size: clamp(32px, 4vw, 48px);
      color: var(--primary);
      line-height: 1.08;
      letter-spacing: -0.04em;
    }

    .content p {
      margin: 0 0 16px;
      color: var(--muted);
      font-size: 17px;
    }

    .check-list {
      list-style: none;
      margin: 26px 0 0;
      padding: 0;
      display: grid;
      gap: 14px;
    }

    .check-list li {
      position: relative;
      padding: 16px 18px 16px 48px;
      border-radius: 18px;
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow-soft);
      font-weight: 700;
    }

    .check-list li::before {
      content: "✓";
      position: absolute;
      left: 18px;
      top: 50%;
      transform: translateY(-50%);
      width: 22px;
      height: 22px;
      border-radius: 999px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      font-weight: 900;
    }

    .zones-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 14px;
    }

    .zone {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 18px;
      padding: 16px;
      text-align: center;
      font-weight: 800;
      color: var(--primary);
      box-shadow: var(--shadow-soft);
    }

    .faq {
      display: grid;
      gap: 16px;
      max-width: 940px;
      margin: 0 auto;
    }

    .faq-item {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 22px;
      padding: 24px;
      box-shadow: var(--shadow-soft);
    }

    .faq-item h3 {
      margin: 0 0 10px;
      font-size: 22px;
      color: var(--primary);
      line-height: 1.2;
    }

    .faq-item p {
      margin: 0;
      color: var(--muted);
    }

    .cta {
      background:
        linear-gradient(135deg, rgba(9,29,45,0.96), rgba(13,47,74,0.94)),
        url("https://images.unsplash.com/photo-1497366412874-3415097a27e7?auto=format&fit=crop&w=1600&q=80") center/cover no-repeat;
      color: #fff;
      border-radius: 34px;
      padding: 48px;
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .cta-grid {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      flex-wrap: wrap;
    }

    .cta h2 {
      margin: 0 0 10px;
      font-size: clamp(30px, 4vw, 46px);
      line-height: 1.06;
      letter-spacing: -0.04em;
    }

    .cta p {
      margin: 0;
      max-width: 740px;
      color: rgba(255,255,255,0.92);
    }

    footer {
      margin-top: 88px;
      background: var(--dark);
      color: rgba(255,255,255,0.9);
      padding: 64px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr 1fr;
      gap: 28px;
      margin-bottom: 28px;
    }

    .footer-grid h3,
    .footer-grid h4 {
      margin-top: 0;
      color: #fff;
    }

    .footer-grid ul {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
      gap: 10px;
    }

    .footer-grid a {
      color: rgba(255,255,255,0.9);
    }

    .footer-grid a:hover {
      color: #fff;
      text-decoration: underline;
    }

    .footer-bottom {
      padding-top: 22px;
      border-top: 1px solid rgba(255,255,255,0.10);
      font-size: 14px;
      color: rgba(255,255,255,0.70);
    }

    @media (max-width: 1150px) {
      .hero-grid,
      .split,
      .grid-4,
      .grid-3,
      .proof-grid,
      .zones-grid,
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }

      .trust-row {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 820px) {
      .nav {
        flex-direction: column;
        padding: 14px 0;
      }

      .nav-links {
        justify-content: center;
      }

      .hero-grid,
      .split,
      .grid-4,
      .grid-3,
      .proof-grid,
      .zones-grid,
      .footer-grid {
        grid-template-columns: 1fr;
      }

      .hero-form,
      .cta {
        padding: 28px;
      }

      .visual img {
        min-height: 360px;
      }

      .stat-float {
        position: static;
        width: 100%;
        margin-top: 18px;
      }
    }

/* ── Validation champs formulaire ── */
.field-error {
  display: none;
  color: #dc2626;
  font-size: 12px;
  font-weight: 600;
  margin-top: 5px;
  padding-left: 4px;
}

.field input.invalid,
.field select.invalid,
.field textarea.invalid {
  border-color: #dc2626 !important;
  box-shadow: 0 0 0 3px rgba(220,38,38,0.12) !important;
}

header .btn-primary {
  color: #fff;
}