:root {
  --ink: #172033;
  --muted: #5f687d;
  --paper: #ffffff;
  --surface: #f5f8ff;
  --surface-strong: #eaf0ff;
  --line: #dce3f2;
  --blue: #2767d7;
  --blue-dark: #1b4fae;
  --purple: #7440c9;
  --pink: #d7469d;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(43, 67, 126, 0.14);
  --radius-lg: 30px;
  --radius-md: 20px;
  --content: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "YuGothic", "Noto Sans JP", sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

:focus-visible {
  outline: 3px solid rgba(39, 103, 215, 0.42);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 10px 14px;
  color: var(--white);
  background: var(--ink);
  border-radius: 10px;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(100% - 48px, var(--content));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(220, 227, 242, 0.9);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.header-inner {
  display: flex;
  min-height: 70px;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 850;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  box-shadow: 0 8px 20px rgba(39, 103, 215, 0.16);
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  color: var(--white);
  background: linear-gradient(145deg, var(--blue), var(--purple));
  border-radius: 12px;
  font-size: 14px;
  font-weight: 900;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-left: auto;
  color: #4f596f;
  font-size: 14px;
}

.desktop-nav a {
  padding: 8px 0;
  text-decoration: none;
}

.desktop-nav a:hover,
.desktop-nav a[aria-current="page"] {
  color: var(--blue-dark);
}

.mobile-menu {
  display: none;
  margin-left: auto;
}

.mobile-menu summary {
  padding: 9px 12px;
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

.mobile-menu summary::-webkit-details-marker {
  display: none;
}

.mobile-menu nav {
  position: absolute;
  top: 69px;
  right: 16px;
  left: 16px;
  display: grid;
  padding: 10px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.mobile-menu nav a {
  padding: 12px 14px;
  border-radius: 10px;
  text-decoration: none;
}

.mobile-menu nav a:hover {
  background: var(--surface);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 104px 0 92px;
  background:
    radial-gradient(circle at 82% 20%, rgba(215, 70, 157, 0.2), transparent 28%),
    radial-gradient(circle at 65% 82%, rgba(116, 64, 201, 0.18), transparent 32%),
    linear-gradient(135deg, #eef6ff 0%, #f7f3ff 58%, #fff7fb 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: clamp(44px, 7vw, 92px);
  align-items: center;
}

.hero-copy {
  max-width: 670px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--blue-dark);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  margin-top: 0;
  letter-spacing: -0.035em;
}

h1 {
  margin-bottom: 24px;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.08;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4.5vw, 48px);
  line-height: 1.2;
}

h3 {
  margin-bottom: 8px;
  font-size: 19px;
  line-height: 1.4;
}

.lead {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

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

.button,
.store-placeholder {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--purple));
  box-shadow: 0 12px 28px rgba(64, 75, 171, 0.2);
  font-weight: 850;
  text-align: center;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.button:hover {
  box-shadow: 0 16px 34px rgba(64, 75, 171, 0.28);
  transform: translateY(-1px);
}

.button.secondary {
  color: #38415a;
  background: rgba(255, 255, 255, 0.72);
  border-color: #bac5dd;
  box-shadow: none;
}

.button.secondary:hover {
  background: var(--white);
}

.store-placeholder {
  color: #687087;
  background: #e8edf7;
  box-shadow: none;
  cursor: default;
}

.hero-art {
  display: grid;
  min-height: 440px;
  place-items: center;
  padding: 42px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(116, 131, 177, 0.17);
  border-radius: 42px;
  box-shadow: var(--shadow);
  text-align: center;
}

.hero-art img {
  width: min(250px, 78%);
  height: auto;
  border-radius: 54px;
  box-shadow: 0 24px 60px rgba(39, 103, 215, 0.23);
}

.hero-art strong {
  margin-top: 20px;
  font-size: 25px;
}

.hero-art span {
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: 92px 0;
}

.section.surface {
  background: var(--surface);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 42px;
}

.section-heading.center {
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.app-grid,
.feature-grid,
.audience-grid,
.link-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.app-card,
.feature-card,
.audience-card,
.link-card {
  padding: 26px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.app-card {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 20px;
  align-items: center;
  color: var(--ink);
  text-decoration: none;
  transition: border-color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.app-card:hover {
  border-color: rgba(39, 103, 215, 0.5);
  box-shadow: 0 16px 38px rgba(50, 73, 134, 0.12);
  transform: translateY(-2px);
}

.app-card img {
  width: 74px;
  height: 74px;
  border-radius: 18px;
  box-shadow: 0 10px 26px rgba(39, 103, 215, 0.18);
}

.app-card p,
.feature-card p,
.audience-card p,
.link-card p {
  margin: 0;
  color: var(--muted);
}

.feature-card .number {
  display: grid;
  width: 40px;
  height: 40px;
  margin-bottom: 18px;
  place-items: center;
  color: var(--white);
  background: linear-gradient(145deg, var(--blue), var(--purple));
  border-radius: 12px;
  font-weight: 900;
}

.audience-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.audience-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.audience-card .dot {
  width: 12px;
  height: 12px;
  margin-top: 8px;
  flex: 0 0 auto;
  background: linear-gradient(145deg, var(--blue), var(--pink));
  border-radius: 50%;
}

.link-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.link-card {
  color: var(--ink);
  text-decoration: none;
}

.link-card:hover {
  border-color: rgba(39, 103, 215, 0.55);
}

.text-link {
  color: var(--blue-dark);
  font-weight: 850;
  text-underline-offset: 4px;
}

.note {
  margin-top: 16px;
  color: var(--muted);
  font-size: 13px;
}

.page-hero {
  padding: 86px 0 62px;
  background: linear-gradient(135deg, #eef6ff, #faf5ff);
}

.page-hero .lead {
  max-width: 720px;
}

.document {
  width: min(100% - 48px, 760px);
  margin-inline: auto;
  padding: 72px 0 90px;
}

.document h2 {
  margin-top: 48px;
  font-size: 25px;
}

.document h3 {
  margin-top: 30px;
}

.document p,
.document li {
  color: #354057;
}

.document ul {
  padding-left: 22px;
}

.status-note,
.info-box {
  margin: 24px 0;
  padding: 20px 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--blue);
  border-radius: 14px;
}

.status-note strong,
.info-box strong {
  display: block;
  margin-bottom: 4px;
}

.faq {
  border-top: 1px solid var(--line);
}

.faq details {
  padding: 18px 4px;
  border-bottom: 1px solid var(--line);
}

.faq summary {
  display: flex;
  cursor: pointer;
  font-weight: 850;
  list-style: none;
}

.faq summary::after {
  margin-left: auto;
  color: var(--blue);
  content: "+";
}

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

.faq details p {
  margin: 10px 0 0;
  color: var(--muted);
}

.site-footer {
  padding: 42px 0 28px;
  color: #687087;
  background: #10192b;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px;
  align-items: start;
}

.site-footer .brand,
.site-footer a {
  color: var(--white);
}

.site-footer p {
  max-width: 520px;
  margin: 12px 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
}

.footer-links a {
  text-underline-offset: 4px;
}

.operator {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 13px;
}

.error-page {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 30px;
  background: linear-gradient(135deg, #eef6ff, #faf5ff);
  text-align: center;
}

.error-page .panel {
  max-width: 620px;
  padding: 46px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

@media (max-width: 860px) {
  .desktop-nav {
    display: none;
  }

  .mobile-menu {
    display: block;
  }

  .hero-grid,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    max-width: none;
  }

  .hero-art {
    min-height: 360px;
  }

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

@media (max-width: 620px) {
  .container,
  .document {
    width: min(100% - 32px, var(--content));
  }

  .header-inner {
    min-height: 62px;
  }

  .mobile-menu nav {
    top: 61px;
  }

  .hero {
    padding: 72px 0 68px;
  }

  .hero-art {
    min-height: 310px;
    padding: 30px;
    border-radius: 30px;
  }

  .hero-art img {
    width: min(210px, 76%);
    border-radius: 44px;
  }

  .section {
    padding: 68px 0;
  }

  .actions {
    display: grid;
  }

  .button,
  .store-placeholder {
    width: 100%;
  }

  .audience-grid,
  .link-grid {
    grid-template-columns: 1fr;
  }

  .app-card {
    grid-template-columns: 62px 1fr;
    padding: 20px;
  }

  .app-card img {
    width: 62px;
    height: 62px;
    border-radius: 15px;
  }

  .page-hero {
    padding: 66px 0 46px;
  }

  .document {
    padding: 54px 0 70px;
  }

  .error-page .panel {
    padding: 34px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}