:root {
      --navy: #07345c;
      --blue: #0a7ac4;
      --cyan: #26bde8;
      --ice: #edf9ff;
      --soft: #f7fbff;
      --text: #213243;
      --muted: #66798b;
      --line: #d6e9f4;
      --white: #ffffff;
      --green: #10a37f;
      --shadow: 0 18px 45px rgba(7, 52, 92, 0.12);
      --radius: 26px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: Arial, Helvetica, sans-serif;
      color: var(--text);
      line-height: 1.7;
      background:
        radial-gradient(circle at 8% 5%, rgba(38, 189, 232, 0.18), transparent 30%),
        radial-gradient(circle at 94% 10%, rgba(10, 122, 196, 0.14), transparent 32%),
        linear-gradient(180deg, #ffffff 0%, #f2faff 45%, #ffffff 100%);
    }

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

    a {
      color: var(--blue);
      font-weight: 800;
      text-decoration: none;
    }

    a:hover {
      color: var(--navy);
      text-decoration: underline;
    }

    .top-strip {
      background: linear-gradient(90deg, var(--navy), var(--blue), var(--cyan));
      color: #ffffff;
      padding: 12px 5%;
      display: flex;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      font-size: 14px;
      letter-spacing: 0.2px;
    }

    .page {
      max-width: 1260px;
      margin: 0 auto;
      padding: 0 18px 48px;
    }

    .hero {
      position: relative;
      overflow: hidden;
      margin: 34px 0 30px;
      border: 1px solid var(--line);
      border-radius: 34px;
      background:
        linear-gradient(120deg, rgba(255,255,255,0.98) 0%, rgba(241,250,255,0.96) 52%, rgba(230,247,255,0.92) 100%);
      box-shadow: var(--shadow);
    }

    .hero::before {
      content: "";
      position: absolute;
      width: 520px;
      height: 520px;
      right: -160px;
      top: -180px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(38, 189, 232, 0.24), transparent 70%);
      pointer-events: none;
    }

    .hero::after {
      content: "";
      position: absolute;
      width: 420px;
      height: 420px;
      left: -180px;
      bottom: -180px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(10, 122, 196, 0.12), transparent 72%);
      pointer-events: none;
    }

    .hero-inner {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 0.92fr 1.08fr;
      gap: 30px;
      align-items: center;
      padding: 46px;
    }

    .hero-label {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 16px;
      margin-bottom: 18px;
      border-radius: 999px;
      background: #ffffff;
      border: 1px solid #bfe6f8;
      color: var(--navy);
      font-size: 13px;
      font-weight: 900;
      text-transform: uppercase;
      letter-spacing: 0.06em;
    }

    h1 {
      margin: 0 0 18px;
      color: var(--navy);
      font-size: clamp(36px, 4.2vw, 64px);
      line-height: 1.02;
      letter-spacing: -1.4px;
    }

    .hero-lead {
      margin: 0 0 24px;
      color: var(--muted);
      font-size: 18px;
      max-width: 760px;
    }

    .hero-points {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 12px;
      margin: 26px 0;
    }

    .hero-point {
      padding: 14px 16px;
      border-radius: 18px;
      background: #ffffff;
      border: 1px solid var(--line);
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: #32485b;
      font-size: 15px;
      font-weight: 700;
    }

    .hero-point span {
      width: 24px;
      height: 24px;
      flex: 0 0 24px;
      border-radius: 50%;
      background: var(--blue);
      color: #ffffff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      font-weight: 900;
    }

    .hero-actions {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
      margin-top: 26px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 22px;
      border-radius: 999px;
      font-weight: 900;
      border: 1px solid transparent;
      transition: all 0.25s ease;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--navy), var(--blue), var(--cyan));
      color: #ffffff;
      box-shadow: 0 14px 28px rgba(10, 122, 196, 0.25);
    }

    .btn-primary:hover {
      color: #ffffff;
      transform: translateY(-2px);
      text-decoration: none;
    }

    .btn-outline {
      color: var(--navy);
      background: #ffffff;
      border-color: var(--line);
    }

    .btn-outline:hover {
      background: var(--ice);
      text-decoration: none;
    }

    .hero-media {
      display: grid;
      gap: 16px;
    }

    .figure {
      margin: 0;
    }

    .image-frame {
      width: 100%;
      overflow: hidden;
      border-radius: 24px;
      background: #ffffff;
      border: 1px solid var(--line);
      box-shadow: 0 12px 28px rgba(7, 52, 92, 0.10);
    }

    .ratio-4-3 {
      aspect-ratio: 4 / 3;
    }

    .ratio-3-2 {
      aspect-ratio: 3 / 2;
    }

    .ratio-16-9 {
      aspect-ratio: 16 / 9;
    }

    .ratio-1-1 {
      aspect-ratio: 1 / 1;
    }

    .image-frame img {
      width: 100%;
      height: 100%;
      object-position: center;
    }

    .image-frame.cover img {
      object-fit: cover;
    }

    .image-frame.contain img {
      object-fit: contain;
      padding: 12px;
      background: #ffffff;
    }

    .image-note {
      padding: 10px 12px;
      color: var(--muted);
      font-size: 13px;
      line-height: 1.45;
    }

    .spec-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
    }

    .spec-box {
      padding: 16px;
      border-radius: 18px;
      background: #ffffff;
      border: 1px solid var(--line);
      text-align: center;
    }

    .spec-box strong {
      display: block;
      color: var(--blue);
      font-size: 22px;
      line-height: 1.1;
      margin-bottom: 5px;
    }

    .spec-box span {
      color: var(--muted);
      font-size: 13px;
      font-weight: 700;
    }

    .nav-pills {
      display: flex;
      gap: 10px;
      overflow-x: auto;
      padding: 12px;
      margin: 28px 0;
      background: #ffffff;
      border: 1px solid var(--line);
      border-radius: 999px;
      box-shadow: 0 8px 22px rgba(7, 52, 92, 0.08);
    }

    .nav-pills a {
      white-space: nowrap;
      padding: 10px 16px;
      border-radius: 999px;
      background: var(--ice);
      color: var(--navy);
      font-size: 14px;
    }

    .section {
      margin-bottom: 28px;
      padding: 38px;
      border-radius: var(--radius);
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.97);
      box-shadow: var(--shadow);
    }

    .section.alt {
      background: linear-gradient(135deg, #ffffff, #f1faff);
    }

    h2 {
      margin: 0 0 16px;
      color: var(--navy);
      font-size: clamp(28px, 3vw, 44px);
      line-height: 1.14;
      letter-spacing: -0.5px;
    }

    h3 {
      margin: 0 0 10px;
      color: var(--navy);
      font-size: 21px;
      line-height: 1.25;
    }

    .section p {
      margin: 0 0 18px;
      color: #354b5d;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: 0.95fr 1.05fr;
      gap: 32px;
      align-items: center;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
      margin-top: 24px;
    }

    .card {
      padding: 22px;
      border-radius: 20px;
      border: 1px solid var(--line);
      background: #ffffff;
      min-height: 150px;
    }

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

    .check-list {
      list-style: none;
      padding-left: 0;
      margin: 20px 0 0;
      display: grid;
      gap: 12px;
    }

    .check-list li {
      position: relative;
      padding-left: 32px;
      color: #354b5d;
    }

    .check-list li::before {
      content: "✓";
      position: absolute;
      left: 0;
      top: 0;
      width: 23px;
      height: 23px;
      border-radius: 50%;
      background: var(--blue);
      color: #ffffff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      font-weight: 900;
    }

    .mode-table,
    .parameter-table {
      width: 100%;
      margin-top: 24px;
      border-collapse: separate;
      border-spacing: 0;
      border: 1px solid var(--line);
      border-radius: 20px;
      overflow: hidden;
      background: #ffffff;
    }

    .mode-table th,
    .mode-table td,
    .parameter-table th,
    .parameter-table td {
      padding: 15px 16px;
      border-bottom: 1px solid var(--line);
      text-align: left;
      vertical-align: top;
    }

    .mode-table th {
      background: linear-gradient(90deg, var(--navy), var(--blue));
      color: #ffffff;
      font-weight: 900;
    }

    .mode-table tr:last-child td,
    .parameter-table tr:last-child th,
    .parameter-table tr:last-child td {
      border-bottom: none;
    }

    .parameter-table th {
      width: 36%;
      background: #f0f9ff;
      color: var(--navy);
      font-weight: 900;
    }

    .parameter-table td {
      color: #354b5d;
    }

    .info-band {
      margin-top: 24px;
      padding: 24px;
      border-radius: 24px;
      background:
        radial-gradient(circle at right top, rgba(38, 189, 232, 0.18), transparent 35%),
        linear-gradient(135deg, #ffffff, #eef9ff);
      border: 1px solid var(--line);
      color: #354b5d;
    }

    .notice {
      margin-top: 24px;
      padding: 16px 18px;
      border-left: 4px solid var(--blue);
      background: #eef8fb;
      color: #24485b;
      font-size: 15px;
      border-radius: 12px;
    }

    details {
      margin-bottom: 12px;
      border: 1px solid var(--line);
      border-radius: 16px;
      background: #f8fdff;
      overflow: hidden;
    }

    summary {
      cursor: pointer;
      padding: 16px 18px;
      color: var(--navy);
      font-weight: 900;
      list-style: none;
    }

    summary::-webkit-details-marker {
      display: none;
    }

    summary::after {
      content: "+";
      float: right;
      color: var(--blue);
      font-size: 22px;
      line-height: 1;
    }

    details[open] summary::after {
      content: "−";
    }

    details p {
      padding: 0 18px 18px;
      margin: 0;
      color: #354b5d;
    }

    .final-cta {
      text-align: center;
      padding: 44px 28px;
      border-radius: var(--radius);
      color: #ffffff;
      background:
        radial-gradient(circle at top right, rgba(255,255,255,0.28), transparent 30%),
        linear-gradient(135deg, var(--navy), var(--blue), var(--cyan));
      box-shadow: var(--shadow);
    }

    .final-cta h2 {
      color: #ffffff;
      margin-bottom: 14px;
    }

    .final-cta p {
      max-width: 760px;
      margin: 0 auto 22px;
      color: rgba(255,255,255,0.92);
    }

    .final-cta .btn {
      background: #ffffff;
      color: var(--navy);
    }

    footer {
      padding: 28px 18px;
      text-align: center;
      color: var(--muted);
      font-size: 14px;
    }

    @media (max-width: 980px) {
      .hero-inner,
      .grid-2,
      .grid-3 {
        grid-template-columns: 1fr;
      }

      .hero-inner,
      .section {
        padding: 28px 22px;
      }

      .hero-points {
        grid-template-columns: 1fr;
      }

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

      .mode-table,
      .parameter-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
      }
    }

    @media (max-width: 560px) {
      h1 {
        font-size: 34px;
      }

      .hero-lead {
        font-size: 16px;
      }

      .btn {
        width: 100%;
      }

      .nav-pills {
        border-radius: 18px;
      }
    }