/* ── Reset & Base ── */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { font-size: 16px; -webkit-font-smoothing: antialiased; scroll-behavior: smooth; }
    body {
      font-family: "Noto Sans JP", "Helvetica Neue", Arial, sans-serif;
      color: oklch(14% 0.012 255);
      background-color: #fff;
      line-height: 1.8;
    }
    h1, h2, h3 {
      font-family: "Noto Serif JP", Georgia, serif;
      line-height: 1.2;
      color: oklch(14% 0.012 255);
      letter-spacing: -0.01em;
    }
    a { color: oklch(50.5% 0.195 255); text-decoration: none; transition: color 0.15s ease; }
    a:hover { color: oklch(43% 0.195 255); }
    img, svg { display: block; max-width: 100%; }

    /* ── Layout ── */
    .site-container {
      width: 100%;
      max-width: 1100px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 2rem;
      padding-right: 2rem;
    }

    /* ── Navigation ── */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: #fff;
      border-bottom: 1px solid transparent;
      transition: border-color 0.15s ease;
    }
    .site-header.scrolled { border-bottom-color: oklch(91.5% 0.006 240); }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
      gap: 1.5rem;
    }
    .nav-links {
      display: none;
      align-items: center;
      gap: 0.25rem;
      margin-left: auto;
      justify-content: flex-end;
    }
    .nav-link {
      padding: 0.5rem 0.75rem;
      font-size: 0.9375rem;
      font-weight: 500;
      color: oklch(14% 0.012 255);
      text-decoration: none;
      border-radius: 0.375rem;
      transition: background-color 0.15s ease;
    }
    .nav-link:hover { background-color: oklch(97.3% 0.006 240); color: oklch(14% 0.012 255); }
    .nav-cta { display: none; }
    @media (min-width: 1024px) {
      .nav-links { display: flex; }
      .nav-cta { display: flex; align-items: center; }
    }

    /* ── Buttons ── */
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      padding: 0.875rem 2rem;
      background-color: oklch(50.5% 0.195 255);
      color: #fff;
      font-family: "Noto Sans JP", sans-serif;
      font-size: 0.9375rem;
      font-weight: 600;
      border-radius: 0.375rem;
      border: none;
      transition: background-color 0.15s ease, box-shadow 0.15s ease;
      min-height: 48px;
      white-space: nowrap;
      letter-spacing: 0.01em;
      text-decoration: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background-color: oklch(43% 0.195 255);
      box-shadow: 0 2px 8px oklch(50.5% 0.195 255 / 0.25);
      color: #fff;
    }
    .btn-primary-sm {
      padding: 0.5rem 1.25rem;
      font-size: 0.875rem;
      min-height: 40px;
    }

    /* ── Section label ── */
    .section-label {
      font-family: "DM Sans", sans-serif;
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 0.15em;
      text-transform: uppercase;
      color: oklch(50.5% 0.195 255);
      display: block;
      margin-bottom: 1.25rem;
    }

    /* ── Typography ── */
    .display-heading {
      font-family: "Noto Serif JP", serif;
      font-size: 1.75rem;
      font-weight: 700;
      color: oklch(14% 0.012 255);
      line-height: 1.15;
      letter-spacing: -0.02em;
    }
    @media (min-width: 1024px) { .display-heading { font-size: 3rem; } }

    .section-heading {
      font-family: "Noto Serif JP", serif;
      font-size: 1.625rem;
      font-weight: 700;
      color: oklch(14% 0.012 255);
      line-height: 1.25;
      margin-bottom: 1.25rem;
    }
    @media (min-width: 1024px) { .section-heading { font-size: 2.25rem; } }

    .sub-heading {
      font-family: "Noto Serif JP", serif;
      font-size: 1.25rem;
      font-weight: 700;
      color: oklch(14% 0.012 255);
      line-height: 1.3;
    }

    .lead-text {
      font-size: 1rem;
      color: oklch(43% 0.012 255);
      line-height: 1.85;
      max-width: 45rem;
    }
    @media (min-width: 1024px) { .lead-text { font-size: 1.125rem; } }

    .prose-text {
      font-size: 0.9375rem;
      color: oklch(43% 0.012 255);
      line-height: 1.85;
    }
    @media (min-width: 1024px) { .prose-text { font-size: 1rem; } }

    /* ── Service card ── */
    .service-card {
      background-color: #fff;
      border: 1px solid oklch(91.5% 0.006 240);
      border-radius: 0.375rem;
      padding: 1.5rem;
      transition: border-color 0.15s ease;
      display: flex;
      gap: 1.25rem;
    }
    @media (min-width: 768px) { .service-card { padding: 1.75rem; } }
    .service-card:hover { border-color: oklch(75% 0.015 255); }

    .step-number {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 2rem;
      height: 2rem;
      background-color: oklch(50.5% 0.195 255);
      color: #fff;
      font-family: "DM Sans", sans-serif;
      font-size: 0.75rem;
      font-weight: 700;
      border-radius: 50%;
      flex-shrink: 0;
    }

    /* ── Service grid ── */
    .service-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 1.5rem;
    }
    @media (min-width: 768px) { .service-grid { grid-template-columns: 1fr 1fr; } }

    /* ── FAQ ── */
    .faq-item { border-bottom: 1px solid oklch(91.5% 0.006 240); }
    .faq-question {
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 1rem;
      padding: 1.25rem 0;
      background: none;
      border: none;
      text-align: left;
      font-family: "Noto Sans JP", sans-serif;
      font-size: 0.9375rem;
      font-weight: 600;
      color: oklch(14% 0.012 255);
      cursor: pointer;
      min-height: 44px;
      transition: color 0.15s ease;
    }
    .faq-question:hover { color: oklch(50.5% 0.195 255); }
    .faq-answer {
      padding-bottom: 1.25rem;
      font-size: 0.9375rem;
      color: oklch(43% 0.012 255);
      line-height: 1.85;
      display: none;
    }
    .faq-item.open .faq-answer { display: block; }
    .faq-icon { flex-shrink: 0; color: oklch(67% 0.01 255); transition: transform 0.2s ease; }
    .faq-item.open .faq-icon { transform: rotate(180deg); color: oklch(50.5% 0.195 255); }

    /* ── Divider (main.css: hidden globally) ── */
    .section-divider {
      display: none;
    }

    /* ── Footer ── */
    .site-footer { background-color: oklch(14% 0.012 255); color: oklch(55% 0.01 255); }
    .footer-inner { padding-top: 3rem; padding-bottom: 3rem; }
    @media (min-width: 1024px) { .footer-inner { padding-top: 4rem; padding-bottom: 4rem; } }
    .footer-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 2rem;
    }
    @media (min-width: 640px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
    @media (min-width: 1024px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2.5rem; } }
    .footer-col-title { font-family: "DM Sans", sans-serif; font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: #fff; margin-bottom: 1rem; }
    .footer-link { display: block; font-size: 0.875rem; color: oklch(50% 0.01 255); text-decoration: none; transition: color 0.15s ease; margin-bottom: 0.625rem; }
    .footer-link:hover { color: #fff; }
    .footer-bottom {
      margin-top: 2.5rem;
      padding-top: 1.5rem;
      border-top: 1px solid oklch(22% 0.01 255);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      gap: 0.75rem;
    }
    @media (min-width: 640px) { .footer-bottom { flex-direction: row; } }
    .footer-copyright { font-size: 0.75rem; color: oklch(38% 0.01 255); }
    .footer-policy-link { font-size: 0.75rem; color: oklch(38% 0.01 255); text-decoration: none; transition: color 0.15s ease; }
    .footer-policy-link:hover { color: #fff; }

    /* ── CTA Section ── */
    .cta-section { padding: 5rem 1.5rem; text-align: center; }
    .cta-inner { max-width: 760px; margin: 0 auto; }
    .cta-heading { font-size: 1.5rem; font-weight: 600; letter-spacing: 0.01em; margin-bottom: 1.25rem; line-height: 1.4; color: oklch(14% 0.012 255); }
    .cta-body { font-size: 1rem; line-height: 1.8; color: #555; margin-bottom: 2rem; }