:root {
  --ink: #172033;
  --muted: #657085;
  --line: #dfe5ee;
  --surface: #ffffff;
  --soft: #f5f8fb;
  --primary: #135d66;
  --primary-dark: #0c454d;
  --accent: #e6b655;
  --shadow: 0 20px 55px rgba(30, 46, 70, 0.11);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 10% 0%, rgba(230, 182, 85, 0.18), transparent 30rem),
    linear-gradient(180deg, #f7fafb 0, #eef4f5 31rem, #fff 31rem);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.75;
}

a {
  color: inherit;
}

.site-header {
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(223, 229, 238, 0.85);
  backdrop-filter: blur(12px);
}

.header-inner,
.subnav-inner,
main,
.footer-inner {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.header-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-size: 1.08rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  aspect-ratio: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3px;
  padding: 5px;
  border-radius: 9px;
  background: var(--ink);
  box-shadow: 5px 5px 0 var(--accent);
}

.brand-mark span {
  background: #fff;
  border-radius: 1px;
}

.brand-mark span:nth-child(2),
.brand-mark span:nth-child(4),
.brand-mark span:nth-child(8) {
  opacity: 0;
}

.utility-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 18px;
  color: #4e5a6f;
  font-size: 0.88rem;
}

.utility-nav a,
.footer-tool-nav a {
  text-underline-offset: 4px;
  text-decoration-color: #b9c2d0;
}

.utility-nav a:hover,
.footer-tool-nav a:hover {
  color: var(--primary);
}

.subnav {
  background: var(--ink);
  color: #fff;
}

.subnav-inner {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.subnav-inner::-webkit-scrollbar {
  display: none;
}

.subnav a {
  flex: 0 0 auto;
  padding: 12px 18px;
  color: #dbe1eb;
  font-size: 0.9rem;
  text-decoration: none;
}

.subnav a:hover,
.subnav a[aria-current="page"] {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

main {
  padding-block: 64px 88px;
}

.page-hero {
  max-width: 820px;
  margin-bottom: 38px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

h1 {
  margin: 0;
  font-size: clamp(2.25rem, 7vw, 4.4rem);
  line-height: 1.1;
  letter-spacing: -0.045em;
}

.page-hero > p:last-child {
  max-width: 680px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 2.3vw, 1.16rem);
}

.content-card {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.content-section {
  padding: clamp(28px, 5vw, 52px);
}

.content-section + .content-section {
  border-top: 1px solid var(--line);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.section-label::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--accent);
}

h2 {
  margin: 0 0 14px;
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  line-height: 1.4;
  letter-spacing: -0.025em;
}

.content-section > p {
  margin: 0;
  color: var(--muted);
}

.content-section > p + p {
  margin-top: 14px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 26px;
}

.feature-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
  background: var(--soft);
}

.feature-number {
  display: grid;
  width: 34px;
  aspect-ratio: 1;
  place-items: center;
  margin-bottom: 14px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
}

.feature-card h3 {
  margin: 0 0 7px;
  font-size: 1rem;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.87rem;
}

.notice {
  border-left: 4px solid var(--accent);
  border-radius: 0 14px 14px 0;
  padding: 18px 20px;
  background: #fff9ec;
  color: #596274;
  font-size: 0.9rem;
}

.official-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 22px;
  border: 1px solid var(--primary);
  border-radius: 999px;
  padding: 11px 18px;
  color: var(--primary);
  font-weight: 800;
  text-decoration: none;
}

.official-link:hover {
  background: var(--primary);
  color: #fff;
}

.qr-list-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  margin-top: 26px;
}

.qr-list-card {
  position: relative;
  display: grid;
  place-items: center;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px 14px 16px;
  background: var(--soft);
}

.qr-list-number {
  position: absolute;
  top: 10px;
  left: 12px;
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.qr-list-card img {
  display: block;
  width: 100%;
  max-width: 150px;
  height: auto;
  margin-top: 8px;
  border-radius: 7px;
  background: #fff;
  image-rendering: pixelated;
}

.empty-list {
  margin: 24px 0 0;
  border: 1px dashed #cbd4df;
  border-radius: 14px;
  padding: 24px;
  color: var(--muted);
  text-align: center;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer-inner {
  padding-block: 48px 30px;
}

.footer-tool-nav {
  padding-bottom: 30px;
}

.footer-tool-title {
  margin-bottom: 14px;
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.footer-tool-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-tool-nav a {
  color: #566176;
  font-size: 0.82rem;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 24px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
  color: var(--muted);
  font-size: 0.75rem;
}

.footer-bottom p {
  margin: 0;
}

@media (max-width: 900px) {
  .qr-list-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .header-inner {
    padding-block: 16px;
    align-items: flex-start;
    flex-direction: column;
  }

  .utility-nav {
    justify-content: flex-start;
  }

  main {
    padding-top: 46px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .header-inner,
  .subnav-inner,
  main,
  .footer-inner {
    width: min(100% - 24px, 1120px);
  }

  .subnav-inner {
    width: 100%;
    padding-inline: 6px;
  }

  main {
    padding-block: 38px 60px;
  }

  .page-hero {
    margin-bottom: 28px;
  }

  .qr-list-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
.ad-center {
  max-width: 728px;
  margin: 20px auto;
  text-align: center;
}