:root {
      --color-primary: #1c4da1;
      --color-primary-light: #e8eef8;
      --color-text: #1a1a2e;
      --color-text-muted: #6b7280;
      --color-bg: #ffffff;
      --color-bg-secondary: #f8f9fc;
      --color-border: #e5e7eb;
      --color-danger: #dc2626;
      --container: 1160px;
      --radius: 18px;
      --header-height: 76px;
    }

    * { box-sizing: border-box; }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: calc(var(--header-height) + 18px);
    }

    body {
      margin: 0;
      font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      color: var(--color-text);
      background: var(--color-bg);
      line-height: 1.6;
    }

    body.menu-open { overflow: hidden; }

    a { color: inherit; text-decoration: none; }
    img, svg { max-width: 100%; display: block; }
    button, input, textarea { font: inherit; }

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

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

    .navbar {
      min-height: var(--header-height);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      letter-spacing: -0.03em;
    }

    .logo-mark {
      width: 20px;
      height: 20px;
      background: var(--color-primary);
      border-radius: 5px;
      flex: 0 0 auto;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 6px;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .nav-link {
      display: inline-flex;
      padding: 10px 12px;
      color: var(--color-text-muted);
      font-weight: 600;
      transition: color 0.2s ease, background 0.2s ease;
      border-radius: 999px;
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--color-primary);
      background: var(--color-primary-light);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 46px;
      padding: 12px 20px;
      border: 1px solid transparent;
      border-radius: 999px;
      cursor: pointer;
      font-weight: 700;
      transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
    }

    .btn:hover { transform: translateY(-2px); }
    .btn-primary { color: #fff; background: var(--color-primary); }
    .btn-primary:hover { background: #163f85; }
    .btn-ghost { color: var(--color-primary); background: #fff; border-color: #c8d5ec; }

    .hamburger {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--color-border);
      border-radius: 12px;
      background: #fff;
      cursor: pointer;
      position: relative;
    }

    .hamburger span {
      position: absolute;
      left: 11px;
      right: 11px;
      height: 2px;
      background: var(--color-text);
      border-radius: 2px;
      transition: transform 0.2s ease, opacity 0.2s ease, top 0.2s ease;
    }

    .hamburger span:nth-child(1) { top: 14px; }
    .hamburger span:nth-child(2) { top: 21px; }
    .hamburger span:nth-child(3) { top: 28px; }
    .hamburger.active span:nth-child(1) { top: 21px; transform: rotate(45deg); }
    .hamburger.active span:nth-child(2) { opacity: 0; }
    .hamburger.active span:nth-child(3) { top: 21px; transform: rotate(-45deg); }

    main { overflow: hidden; }

    section { padding: 88px 0; }
    .section-muted { background: var(--color-bg-secondary); }

    .section-header {
      max-width: 720px;
      margin: 0 auto 44px;
      text-align: center;
    }

    .section-title {
      margin: 0 0 12px;
      font-size: clamp(32px, 5vw, 44px);
      line-height: 1.12;
      letter-spacing: -0.04em;
    }

    .section-subtitle,
    .muted { color: var(--color-text-muted); }

    .hero {
      padding: 56px 0 48px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
      gap: 52px;
      align-items: center;
    }

    .tag-pill {
      display: inline-flex;
      align-items: center;
      margin-bottom: 20px;
      padding: 8px 14px;
      border-radius: 999px;
      color: var(--color-primary);
      background: var(--color-primary-light);
      font-weight: 700;
      font-size: 14px;
    }

    h1 {
      margin: 0 0 22px;
      max-width: 720px;
      font-size: clamp(40px, 6.8vw, 68px);
      line-height: 1.02;
      letter-spacing: -0.06em;
    }

    .main-text {
      margin: 0 0 20px;
      max-width: 620px;
      color: var(--color-text);
      letter-spacing: -0.06em;
      line-height: 1.3;
      font-size: clamp(40px, 6.8vw, 68px);
    }

    .hero-text {
      margin: 0 0 30px;
      max-width: 620px;
      color: var(--color-text-muted);
      font-size: 19px;
    }

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

    .illustration-card {
      padding: 24px;
      border: 1px solid var(--color-border);
      border-radius: 30px;
      background: #fff;
    }

    .illustration-card img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }

    .stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 48px;
    }

    .stat {
      padding: 22px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius);
      text-align: center;
      background: #fff;
    }

    .stat strong {
      display: block;
      color: var(--color-primary);
      font-size: 30px;
      line-height: 1.1;
    }

    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }

    .lead {
      margin-bottom: 25px;
      font-size: 18px;
      color: var(--color-text-muted);
    }

    /* .about-grid{
      display: grid;
      grid-template-columns: repeat(3, 1fr);
    } */

    .feature-list { 
      display: grid; 
      grid-template-columns: repeat(3, 1fr);
      gap: 16px; 
    }

    .feature-card,
    .service-card,
    .pricing-card,
    .contact-card,
    .form-card {
      border: 1px solid var(--color-border);
      border-radius: var(--radius);
      background: #fff;
    }

    .feature-card,
    .contact-card { padding: 22px; }

    .card-hover { transition: transform 0.2s ease, border-color 0.2s ease; }
    .card-hover:hover { transform: translateY(-4px); border-color: #c8d5ec; }

    .icon-box {
      width: 46px;
      height: 46px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
      color: var(--color-primary);
      background: var(--color-primary-light);
      border-radius: 14px;
    }

    .feature-card h3,
    .service-card h3,
    .pricing-card h3 { margin: 0 0 8px; font-size: 20px; }
    .feature-card p,
    .service-card p { margin: 0; color: var(--color-text-muted); flex: 1;}

    .services-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 18px;
    }

    .service-card { padding: 24px; grid-column: span 2; }

    .service-card:nth-child(1),
    .service-card:nth-child(2) {
      grid-column: span 3; /* 6/3=2 */
    }

    .service-card-info{
      min-height: 102px;
      margin-bottom: 18px;
    }

    .service-items {
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .details-link {
      align-self: flex-start;
      /* margin-top: auto; */
      padding: 0;
      border: 0;
      background: transparent;
      color: var(--color-primary);
      font-weight: 800;
      cursor: pointer;
    }

    .service-details {
      display: grid;
      grid-template-rows: 0fr;
      transition: grid-template-rows 0.25s ease;
    }

    .service-details > div { overflow: hidden; }
    .service-card.open .service-details { grid-template-rows: 1fr; }
    .service-details p { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--color-border); }

    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .pricing-card { position: relative; padding: 28px; }
    .pricing-card.popular { border: 2px solid var(--color-primary); }

    .badge {
      position: absolute;
      top: 18px;
      right: 18px;
      padding: 6px 10px;
      border-radius: 999px;
      color: #fff;
      background: var(--color-primary);
      font-size: 12px;
      font-weight: 800;
    }

    .price {
      margin: 18px 0;
      color: var(--color-primary);
      font-size: 30px;
      font-weight: 800;
      letter-spacing: -0.03em;
    }

    .list-size { min-height: 133px; margin-bottom: 36px;}

    .check-list { padding: 0; list-style: none; display: grid; gap: 10px; color: var(--color-text-muted); }
    .check-list li { display: flex; gap: 10px; }
    .check-list li::before { content: "✓"; color: var(--color-primary); font-weight: 800; }

    .contact-items { display: grid; gap: 23px; min-height: 500px;}
    .contact-row { display: flex; gap: 14px; align-items: flex-start; }
    .contact-row p { margin: 0; color: var(--color-text-muted); }

    .form-card { padding: 28px; }
    .field { margin-bottom: 16px; }
    label { display: block; margin-bottom: 8px; font-weight: 700; }
    input, textarea {
      width: 100%;
      border: 1px solid var(--color-border);
      border-radius: 14px;
      padding: 13px 14px;
      background: #fff;
      color: var(--color-text);
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }
    textarea { min-height: 126px; resize: vertical; }
    input:focus, textarea:focus { border-color: var(--color-primary); box-shadow: 0 0 0 4px var(--color-primary-light); }
    .invalid { border-color: var(--color-danger) !important; }
    .success-message { display: none; margin-top: 14px; color: #166534; font-weight: 700; }
    .success-message.show { display: block; }

    .site-footer { padding: 38px 0; border-top: 1px solid var(--color-border); background: #fff; }
    .footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 18px; color: var(--color-text-muted); font-weight: 600; }
    .copyright { margin: 12px 0 0; color: var(--color-text-muted); font-size: 14px; }

    .fade-in { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s ease; }
    .fade-in.visible { opacity: 1; transform: translateY(0); }

    @media (max-width: 900px) {
      .hamburger { display: inline-flex; }
      .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        display: none;
        padding: 20px 16px 28px;
        background: #fff;
        border-bottom: 1px solid var(--color-border);
      }
      .nav-menu.open { display: block; }
      .nav-links { display: grid; gap: 8px; margin-bottom: 18px; }
      .nav-link { width: 100%; }
      .nav-menu .btn { width: 100%; }
      .hero-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; }
      .hero { padding-top: 48px; }
      .services-grid, .pricing-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 640px) {
      .container { width: min(100% - 24px, var(--container)); }
      section { padding: 64px 0; }
      .hero-actions .btn { width: 100%; }
      .stats, .services-grid, .pricing-grid { grid-template-columns: 1fr; }
      .illustration-card { padding: 14px; border-radius: 22px; }
    }