:root {
      --navy: #061a34;
      --navy-light: #0d315b;
      --blue: #2875bb;
      --gold: #c7a66a;
      --ink: #14243a;
      --muted: #64748b;
      --line: #dbe5ef;
      --ice: #f5f8fb;
      --white: #ffffff;
      --shadow: 0 20px 60px rgba(4, 19, 38, .12);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }

    body {
      margin: 0;
      color: var(--ink);
      background: var(--ice);
      font-family: Inter, Arial, Helvetica, sans-serif;
      line-height: 1.7;
    }

    a {
      color: var(--blue);
      text-underline-offset: 3px;
    }

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

    .container {
      width: min(1180px, calc(100% - 40px));
      margin: auto;
    }

    .hero {
      color: var(--white);
      padding: 78px 0 70px;
      background:
        radial-gradient(circle at 10% 5%, rgba(70, 145, 205, .25), transparent 32%),
        radial-gradient(circle at 90% 80%, rgba(40, 117, 187, .25), transparent 30%),
        linear-gradient(135deg, var(--navy), var(--navy-light));
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: #b8d8ef;
      font-size: 13px;
      font-weight: 800;
      letter-spacing: .16em;
      text-transform: uppercase;
    }

    .eyebrow::before {
      content: "";
      width: 34px;
      height: 2px;
      background: var(--gold);
    }

    h1 {
      max-width: 700px;
      margin: 20px 0 24px;
      color: var(--white);
      font-size: clamp(42px, 5vw, 78px);
      line-height: 1.02;
      letter-spacing: -.05em;
    }

    .hero-text {
      max-width: 620px;
      color: #d8e7f5;
      font-size: 18px;
    }

    .hero-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 20px;
      margin-top: 24px;
      color: #aac5db;
      font-size: 14px;
    }

    .hero-buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 32px;
    }

    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 48px;
      padding: 0 22px;
      border-radius: 999px;
      font-weight: 800;
      text-decoration: none;
      transition: .2s ease;
    }

    .button:hover {
      transform: translateY(-2px);
    }

    .button-primary {
      color: var(--navy);
      background: #f7d58f;
    }

    .button-secondary {
      color: var(--white);
      border: 1px solid rgba(255,255,255,.35);
      background: rgba(255,255,255,.08);
    }

    .hero-image {
      overflow: hidden;
      margin: 0;
      border: 1px solid rgba(255,255,255,.28);
      border-radius: 26px;
      background: rgba(255,255,255,.96);
      box-shadow: 0 24px 70px rgba(0,0,0,.25);
    }

    .hero-image img {
      display: block;
      width: 100%;
      height: auto;
      aspect-ratio: 1 / 1;
      object-fit: contain;
      background: #fff;
    }

    .image-caption {
      padding: 10px 14px;
      color: #c9dceb;
      background: rgba(4,19,38,.72);
      font-size: 12px;
    }

    .facts {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      margin-top: 48px;
      border: 1px solid rgba(255,255,255,.2);
      border-radius: 18px;
      background: rgba(255,255,255,.08);
    }

    .fact {
      padding: 18px 22px;
      border-right: 1px solid rgba(255,255,255,.16);
    }

    .fact:last-child {
      border-right: 0;
    }

    .fact strong {
      display: block;
      color: var(--white);
      font-size: 19px;
    }

    .fact span {
      display: block;
      margin-top: 3px;
      color: #b9d2e6;
      font-size: 13px;
    }

    .breadcrumbs {
      padding: 22px 0 0;
      color: var(--muted);
      font-size: 13px;
    }

    .breadcrumbs a {
      color: var(--muted);
    }

    .layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 290px;
      gap: 34px;
      align-items: start;
      padding: 28px 0 70px;
    }

    article {
      min-width: 0;
      padding: clamp(25px, 4vw, 56px);
      border: 1px solid var(--line);
      border-radius: 28px;
      background: var(--white);
      box-shadow: var(--shadow);
    }

    article > p:first-child {
      color: #334d69;
      font-size: 18px;
    }

    h2 {
      margin: 54px 0 18px;
      color: var(--navy);
      font-size: clamp(26px, 3vw, 38px);
      line-height: 1.15;
      letter-spacing: -.03em;
    }

    h2::before {
      content: "";
      display: block;
      width: 36px;
      height: 3px;
      margin-bottom: 14px;
      border-radius: 3px;
      background: var(--gold);
    }

    h3 {
      color: var(--navy-light);
    }

    article p,
    article li {
      color: #43566d;
    }

    .notice {
      margin: 26px 0;
      padding: 20px 22px;
      border-left: 4px solid var(--blue);
      border-radius: 0 14px 14px 0;
      color: #294765;
      background: #eaf4fb;
    }

    .notice strong {
      display: block;
      margin-bottom: 5px;
      color: var(--navy);
    }

    .steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 12px;
      margin-top: 24px;
    }

    .step,
    .feature {
      padding: 20px;
      border: 1px solid var(--line);
      border-radius: 16px;
      background: #fbfdff;
    }

    .step-number {
      display: grid;
      place-items: center;
      width: 32px;
      height: 32px;
      margin-bottom: 12px;
      border-radius: 50%;
      color: var(--white);
      background: var(--navy-light);
      font-weight: 800;
    }

    .step strong,
    .feature strong {
      display: block;
      color: var(--navy);
    }

    .step p,
    .feature p {
      margin: 7px 0 0;
      font-size: 14px;
      line-height: 1.55;
    }

    .feature-grid,
    .media-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
      margin-top: 24px;
    }

    .content-figure {
      overflow: hidden;
      margin: 28px 0;
      border: 1px solid var(--line);
      border-radius: 18px;
      background: #f8fbfe;
    }

    .content-figure img {
      display: block;
      width: 100%;
      height: auto;
      aspect-ratio: 3 / 2;
      object-fit: contain;
      background: #f8fbfe;
    }

    .content-figure figcaption {
      padding: 12px 16px;
      color: var(--muted);
      font-size: 13px;
    }

    .spec-table,
    .comparison-table {
      width: 100%;
      margin-top: 22px;
      border-collapse: collapse;
      font-size: 15px;
    }

    .spec-table th,
    .spec-table td,
    .comparison-table th,
    .comparison-table td {
      padding: 14px 16px;
      text-align: left;
      vertical-align: top;
      border-bottom: 1px solid var(--line);
    }

    .spec-table th,
    .comparison-table tbody th {
      width: 32%;
      color: var(--navy);
      background: #edf5fb;
    }

    .spec-table td,
    .comparison-table td {
      color: #52657a;
    }

    .comparison-table thead th {
      color: var(--white);
      background: var(--navy-light);
    }

    .comparison-table tbody th {
      width: 24%;
    }

    .checklist {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      padding: 0;
      list-style: none;
    }

    .checklist li {
      position: relative;
      margin: 0;
      padding: 15px 15px 15px 42px;
      border: 1px solid var(--line);
      border-radius: 14px;
      background: #fbfdff;
    }

    .checklist li::before {
      content: "✓";
      position: absolute;
      top: 12px;
      left: 15px;
      color: var(--blue);
      font-size: 20px;
      font-weight: 900;
    }

    .safety {
      margin-top: 24px;
      padding: 24px;
      border: 1px solid #f0d59b;
      border-radius: 18px;
      background: #fffaf0;
    }

    .safety h3 {
      margin-top: 0;
      color: #684b1b;
    }

    .safety p {
      color: #725c36;
    }

    .faq-item {
      padding: 20px 0;
      border-bottom: 1px solid var(--line);
    }

    .faq-item h3 {
      margin: 0 0 8px;
      color: var(--navy);
      font-size: 17px;
    }

    .faq-item p {
      margin: 0;
    }

    .references {
      padding-left: 22px;
    }

    .references li {
      margin-bottom: 12px;
    }

    .cta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      margin-top: 56px;
      padding: 28px;
      border-radius: 20px;
      color: var(--white);
      background: linear-gradient(135deg, var(--navy), var(--navy-light));
    }

    .cta h2 {
      margin: 0 0 8px;
      color: var(--white);
      font-size: 26px;
    }

    .cta h2::before {
      display: none;
    }

    .cta p {
      margin: 0;
      color: #c8d9e8;
    }

    .sidebar {
      position: sticky;
      top: 20px;
    }

    .side-box {
      margin-bottom: 16px;
      padding: 22px;
      border: 1px solid var(--line);
      border-radius: 18px;
      background: var(--white);
      box-shadow: 0 12px 30px rgba(4,19,38,.06);
    }

    .side-box h2 {
      margin: 0 0 15px;
      font-size: 20px;
    }

    .side-box h2::before {
      display: none;
    }

    .toc {
      display: grid;
      gap: 9px;
    }

    .toc a {
      color: var(--muted);
      font-size: 14px;
      text-decoration: none;
    }

    .toc a:hover {
      color: var(--blue);
    }

    .side-box p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
    }

    footer {
      padding: 30px 0 45px;
      color: #718196;
      font-size: 13px;
    }

    .footer-line {
      height: 1px;
      margin-bottom: 18px;
      background: var(--line);
    }

    @media (max-width: 950px) {
      .hero-grid,
      .layout {
        grid-template-columns: 1fr;
      }

      .hero-image {
        max-width: 650px;
        margin: auto;
      }

      .sidebar {
        position: static;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
      }

      .side-box {
        margin: 0;
      }
    }

    @media (max-width: 680px) {
      .container {
        width: min(100% - 28px, 1180px);
      }

      .hero {
        padding: 50px 0 45px;
      }

      .facts,
      .steps,
      .feature-grid,
      .media-grid,
      .checklist,
      .sidebar {
        grid-template-columns: 1fr;
      }

      .fact {
        border-right: 0;
        border-bottom: 1px solid rgba(255,255,255,.16);
      }

      .fact:last-child {
        border-bottom: 0;
      }

      article {
        padding: 24px 20px;
      }

      .comparison-table,
      .spec-table {
        min-width: 580px;
      }

      .cta {
        align-items: flex-start;
        flex-direction: column;
      }
    }