:root {
      --ink: #162521;
      --muted: #60717a;
      --deep: #26556c;
      --green: #56a9bd;
      --mint: #e3f4f8;
      --aqua: #f1fbfd;
      --line: #dce8ec;
      --paper: #fff;
      --soft: #f6faf8;
      --accent: #9ecbd6;
      --shadow: 0 24px 64px rgba(38, 85, 108, .14);
      font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, system-ui, sans-serif;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      min-width: 320px;
      color: var(--ink);
      background: var(--paper);
      font-size: 16px;
      line-height: 1.8;
      letter-spacing: 0;
    }

    a { color: inherit; text-decoration: none; }
    p, h1, h2, h3 { margin-top: 0; }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255, 255, 255, .92);
      border-bottom: 1px solid rgba(223, 233, 230, .86);
      backdrop-filter: blur(16px);
    }

    .header-inner,
    .wrap,
    .hero-inner,
    .cta-inner,
    .footer-inner {
      width: min(1120px, calc(100% - 40px));
      margin: 0 auto;
    }

    .header-inner {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--deep);
      font-weight: 900;
      white-space: nowrap;
    }

    .brand-mark {
      width: 40px;
      height: 40px;
      display: grid;
      place-items: center;
      border-radius: 8px;
      color: #fff;
      background: linear-gradient(135deg, var(--green), #9cccd7);
      font-weight: 900;
    }

    .nav {
      display: flex;
      align-items: center;
      gap: 22px;
      color: #40524d;
      font-size: 14px;
      font-weight: 800;
    }

    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 0 20px;
      border-radius: 8px;
      border: 1px solid var(--line);
      background: #fff;
      color: var(--deep);
      font-weight: 900;
      line-height: 1.2;
      transition: transform .18s ease, box-shadow .18s ease;
    }

    .button.primary {
      border-color: var(--green);
      background: var(--green);
      color: #fff;
    }

    .button:hover {
      transform: translateY(-1px);
      box-shadow: 0 12px 28px rgba(86, 169, 189, .18);
    }

    .hero {
      background:
        radial-gradient(circle at 82% 8%, rgba(158, 203, 214, .36), transparent 30%),
        linear-gradient(180deg, #f2fbfd 0%, #fff 100%);
      border-bottom: 1px solid var(--line);
    }

    .hero-inner {
      min-height: calc(100vh - 76px);
      display: grid;
      grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
      gap: 48px;
      align-items: center;
      padding: 78px 0 62px;
    }

    .eyebrow,
    .section-label {
      margin-bottom: 10px;
      color: var(--green);
      font-size: 13px;
      font-weight: 900;
      text-transform: uppercase;
    }

    h1 {
      margin-bottom: 24px;
      color: var(--deep);
      font-size: clamp(38px, 6.5vw, 68px);
      line-height: 1.12;
      font-weight: 900;
    }

    .hero-copy {
      max-width: 680px;
      color: #3f534e;
      font-size: 17px;
    }

    .actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 30px;
    }

    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin: 28px 0 0;
      padding: 0;
      list-style: none;
    }

    .hero-tags li {
      padding: 7px 12px;
      border: 1px solid var(--line);
      border-radius: 8px;
      background: #fff;
      color: #40524d;
      font-size: 13px;
      font-weight: 800;
    }

    .device {
      padding: 18px;
      border: 1px solid #cfe3ea;
      border-radius: 20px;
      background: #f9fffd;
      box-shadow: var(--shadow);
    }

    .tablet {
      aspect-ratio: 4 / 3;
      overflow: hidden;
      border: 14px solid #142e29;
      border-radius: 22px;
      background: #fff;
    }

    .screen-head {
      min-height: 58px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 22px;
      background: var(--green);
      color: #fff;
      font-weight: 900;
    }

    .progress {
      width: 96px;
      height: 8px;
      overflow: hidden;
      border-radius: 99px;
      background: rgba(255, 255, 255, .35);
    }

    .progress::before {
      content: "";
      display: block;
      width: 62%;
      height: 100%;
      background: #fff;
    }

    .question { padding: 24px; }
    .question h2 {
      margin-bottom: 18px;
      color: var(--deep);
      font-size: 22px;
      line-height: 1.4;
    }

    .choice {
      min-height: 48px;
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 10px;
      padding: 0 14px;
      border: 1px solid var(--line);
      border-radius: 8px;
      background: #fff;
      color: #435962;
      font-weight: 800;
    }

    .choice-dot {
      width: 18px;
      height: 18px;
      border: 2px solid #99bcc7;
      border-radius: 50%;
      flex: 0 0 auto;
    }

    .choice.active {
      border-color: rgba(86, 169, 189, .4);
      background: var(--aqua);
    }

    .choice.active .choice-dot { border: 6px solid var(--green); }

    .sync-strip {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      gap: 12px;
      align-items: center;
      margin-top: 18px;
      color: #405862;
      font-size: 13px;
      font-weight: 900;
    }

    .sync-box {
      min-height: 52px;
      display: grid;
      place-items: center;
      border-radius: 8px;
      background: var(--deep);
      color: #fff;
    }

    .sync-arrow { color: var(--green); font-size: 24px; }

    section { padding: 84px 0; }

    .section-head {
      display: grid;
      grid-template-columns: minmax(0, .8fr) minmax(280px, 1fr);
      gap: 40px;
      align-items: end;
      margin-bottom: 34px;
    }

    h2 {
      margin-bottom: 0;
      color: var(--deep);
      font-size: clamp(28px, 4vw, 44px);
      line-height: 1.24;
      font-weight: 900;
    }

    .section-head p { margin-bottom: 0; color: var(--muted); }

    .grid-4,
    .benefit-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
    }

    .card,
    .feature,
    .faq-item,
    .system-node {
      border: 1px solid var(--line);
      border-radius: 8px;
      background: #fff;
    }

    .card {
      min-height: 230px;
      padding: 24px;
    }

    .number {
      display: inline-flex;
      align-items: center;
      min-height: 28px;
      padding: 0 10px;
      border-radius: 8px;
      background: var(--mint);
      color: var(--green);
      font-size: 12px;
      font-weight: 900;
    }

    h3 {
      margin: 18px 0 10px;
      color: var(--deep);
      font-size: 20px;
      line-height: 1.45;
    }

    .card p,
    .feature p,
    .faq-item p,
    .system-node p {
      margin-bottom: 0;
      color: var(--muted);
      font-size: 15px;
    }

    .flow,
    .faq {
      background: var(--soft);
      border-block: 1px solid var(--line);
    }

    .pipeline {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin: 0 0 24px;
      padding: 0;
      list-style: none;
    }

    .pipeline li {
      min-height: 36px;
      display: inline-flex;
      align-items: center;
      padding: 0 12px;
      border: 1px solid var(--line);
      border-radius: 8px;
      background: #fff;
      color: #40524d;
      font-size: 13px;
      font-weight: 900;
    }

    .flow-card {
      padding: 26px;
      border: 1px solid var(--line);
      border-radius: 8px;
      background: #fff;
    }

    .flow-card.center {
      border-color: var(--deep);
      background: var(--deep);
      color: #fff;
      box-shadow: var(--shadow);
    }

    .flow-card.center h3,
    .flow-card.center p { color: #fff; }

    .flow-card ul,
    .feature ul,
    .card ul {
      margin: 16px 0 0;
      padding-left: 1.2em;
      color: #445752;
    }

    .flow-card li,
    .feature li,
    .card li { margin-top: 6px; }

    .feature {
      min-height: 250px;
      padding: 28px;
    }

    .feature-icon {
      width: 44px;
      height: 44px;
      display: grid;
      place-items: center;
      border-radius: 8px;
      background: var(--aqua);
      color: var(--green);
      font-weight: 900;
    }

    .benefits {
      background: var(--deep);
      color: #fff;
    }

    .benefits h2,
    .benefits .section-label { color: #fff; }
    .benefits .section-head p { color: rgba(255, 255, 255, .76); }

    .benefit {
      min-height: 190px;
      padding: 24px;
      border: 1px solid rgba(255, 255, 255, .16);
      border-radius: 8px;
      background: rgba(255, 255, 255, .08);
    }

    .benefit strong {
      display: block;
      margin: 14px 0 8px;
      color: #fff;
      font-size: 18px;
      line-height: 1.45;
    }

    .benefit p {
      margin-bottom: 0;
      color: rgba(255, 255, 255, .76);
      font-size: 14px;
    }

    .integration-map {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 12px;
    }

    .system-node {
      min-height: 128px;
      padding: 18px;
    }

    .system-node.main {
      grid-column: span 2;
      border-color: var(--green);
      background: var(--green);
      color: #fff;
      box-shadow: var(--shadow);
    }

    .system-node span {
      display: block;
      color: inherit;
      font-size: 13px;
      font-weight: 900;
      opacity: .85;
    }

    .system-node strong {
      display: block;
      margin-top: 8px;
      color: inherit;
      font-size: 20px;
      line-height: 1.4;
    }

    .system-node.main p { color: rgba(255, 255, 255, .82); }

    .faq-list { display: grid; gap: 12px; }
    .faq-item { padding: 24px 28px; }
    .faq-item h3 { margin-top: 0; font-size: 18px; }

    .cta {
      padding: 76px 0;
      background: linear-gradient(135deg, rgba(86, 169, 189, .96), rgba(38, 85, 108, .98));
      color: #fff;
    }

    .cta-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
    }

    .cta h2 { margin-bottom: 12px; color: #fff; }
    .cta p { margin-bottom: 0; color: rgba(255, 255, 255, .82); }

    footer {
      padding: 34px 0;
      background: #102d39;
      color: rgba(255, 255, 255, .74);
      font-size: 13px;
    }

    .footer-inner {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      flex-wrap: wrap;
    }

    .footer-links { display: flex; gap: 18px; flex-wrap: wrap; }

    @media (max-width: 920px) {
      .nav { display: none; }
      .hero-inner,
      .section-head { grid-template-columns: 1fr; }
      .hero-inner { min-height: auto; padding-top: 58px; }
      .grid-4,
      .grid-3,
      .benefit-grid,
      .integration-map { grid-template-columns: repeat(2, 1fr); }
      .grid-2 { grid-template-columns: 1fr; }
      .system-node.main { grid-column: span 1; }
      .cta-inner { align-items: flex-start; flex-direction: column; }
    }

    @media (max-width: 600px) {
      .header-inner,
      .wrap,
      .hero-inner,
      .cta-inner,
      .footer-inner { width: min(100% - 28px, 1120px); }
      .site-header { position: static; }
      .header-inner { min-height: 66px; }
      .brand span:last-child { font-size: 14px; }
      .hero-inner { gap: 32px; padding: 42px 0 46px; }
      .device { padding: 10px; }
      .tablet { border-width: 8px; border-radius: 16px; }
      .question { padding: 16px; }
      .question h2 { font-size: 17px; }
      section { padding: 58px 0; }
      .grid-4,
      .grid-3,
      .benefit-grid,
      .integration-map { grid-template-columns: 1fr; }
      .card,
      .feature,
      .benefit { min-height: auto; }
      .actions { flex-direction: column; }
      .button { width: 100%; }
    }