:root {
  color-scheme: light;
  --ink: #392b31;
  --muted: #74656b;
  --coral: #fa6d78;
  --coral-dark: #df515e;
  --mint: #54bdae;
  --rose: #fff0f3;
  --sky: #eef9ff;
  --cream: #fffaf7;
  --line: #eadfe3;
  --surface: #ffffff;
  --shadow: 0 24px 70px rgba(95, 66, 76, 0.13);
  --page: min(1120px, calc(100% - 40px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

a {
  color: inherit;
}

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: #fff;
  background: var(--ink);
  border-radius: 8px;
  transform: translateY(-150%);
}

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

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(234, 223, 227, 0.8);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.nav {
  width: var(--page);
  min-height: 70px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--coral-dark);
  font-size: 1.1rem;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 38px;
  height: 38px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.88rem;
  font-weight: 700;
}

.nav-links a {
  padding: 7px 0;
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a[aria-current="page"] {
  color: var(--coral-dark);
  border-color: var(--coral);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 92px 0 72px;
  background:
    radial-gradient(circle at 0 20%, rgba(255, 222, 231, 0.8), transparent 32%),
    radial-gradient(circle at 100% 12%, rgba(220, 244, 255, 0.9), transparent 31%),
    linear-gradient(180deg, #fff 0%, #fffafd 100%);
}

.hero::before,
.hero::after {
  position: absolute;
  content: "";
  width: 15px;
  height: 15px;
  border-radius: 4px;
  transform: rotate(35deg);
}

.hero::before {
  top: 23%;
  left: 8%;
  background: #ffd96b;
}

.hero::after {
  top: 30%;
  right: 9%;
  background: #83d5ca;
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: var(--page);
  margin: auto;
  text-align: center;
}

.hero h1 {
  margin: 0;
  color: var(--coral);
  font-size: clamp(3.25rem, 8vw, 6.8rem);
  line-height: 1.05;
  letter-spacing: 0.06em;
  text-shadow: 0 6px 0 rgba(250, 109, 120, 0.09);
}

.hero-lead {
  margin: 20px 0 0;
  font-size: clamp(1.45rem, 3vw, 2.25rem);
  font-weight: 800;
  letter-spacing: 0.05em;
}

.hero-copy {
  max-width: 650px;
  margin: 16px auto 0;
  color: var(--muted);
  font-size: 1.05rem;
}

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

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 11px 22px;
  color: #fff;
  background: var(--coral);
  border: 2px solid var(--coral);
  border-radius: 10px;
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 10px 26px rgba(250, 109, 120, 0.2);
  transition: transform 160ms ease, background 160ms ease;
}

.button:hover {
  background: var(--coral-dark);
  transform: translateY(-2px);
}

.button-secondary {
  color: var(--ink);
  background: #fff;
  border-color: var(--line);
  box-shadow: none;
}

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

.product-visual {
  width: min(1040px, calc(100% - 32px));
  margin: 60px auto 0;
  overflow: hidden;
  border-radius: 26px;
  box-shadow: var(--shadow);
}

.product-visual img {
  width: 100%;
  height: auto;
}

.section {
  padding: 96px 0;
}

.section-soft {
  background: linear-gradient(135deg, var(--rose), var(--sky));
}

.section-inner {
  width: var(--page);
  margin: auto;
}

.section-heading {
  max-width: 700px;
  margin: 0 auto 50px;
  text-align: center;
}

.section-heading h2,
.page-title h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.25;
  letter-spacing: 0.03em;
}

.section-heading p,
.page-title p {
  margin: 14px auto 0;
  color: var(--muted);
}

.features {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
}

.feature {
  padding: 10px 24px 0;
  text-align: center;
}

.feature + .feature {
  border-left: 1px solid var(--line);
}

.feature-icon {
  display: grid;
  width: 58px;
  height: 58px;
  margin: 0 auto 18px;
  place-items: center;
  color: var(--coral-dark);
  background: var(--rose);
  border-radius: 18px;
  font-size: 1.55rem;
  font-weight: 800;
}

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

.feature p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.privacy-panel {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 34px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(84, 189, 174, 0.34);
  border-radius: 18px;
}

.privacy-symbol {
  display: grid;
  width: 70px;
  height: 70px;
  place-items: center;
  color: var(--mint);
  border: 4px solid var(--mint);
  border-radius: 28px 28px 34px 34px;
  font-size: 1.65rem;
  font-weight: 900;
}

.privacy-panel h2 {
  margin: 0;
  color: #328f82;
  font-size: 1.35rem;
}

.privacy-panel p {
  margin: 6px 0 0;
  color: var(--muted);
}

.text-link {
  color: #258f80;
  font-weight: 800;
  text-underline-offset: 4px;
}

.page-hero {
  padding: 76px 0 66px;
  background:
    radial-gradient(circle at 8% 80%, rgba(220, 244, 255, 0.95), transparent 28%),
    radial-gradient(circle at 92% 85%, rgba(255, 221, 228, 0.85), transparent 28%),
    #fff;
}

.page-title {
  width: var(--page);
  margin: auto;
  text-align: center;
}

.page-title-with-image {
  max-width: 700px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 30px;
  text-align: left;
}

.page-title-with-image p {
  margin-left: 0;
}

.support-visual {
  width: 112px;
  height: auto;
}

.page-title h1 {
  color: var(--coral);
}

.content {
  width: min(860px, calc(100% - 40px));
  margin: auto;
  padding: 76px 0 96px;
}

.content > section + section {
  margin-top: 70px;
}

.content h2 {
  margin: 0 0 22px;
  font-size: clamp(1.45rem, 3vw, 2rem);
}

.content h3 {
  margin: 32px 0 8px;
  font-size: 1.08rem;
}

.content p,
.content li {
  color: var(--muted);
}

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

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

.faq summary {
  position: relative;
  padding: 20px 42px 20px 4px;
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

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

.faq summary::after {
  position: absolute;
  top: 18px;
  right: 8px;
  content: "＋";
  color: var(--coral);
  font-size: 1.3rem;
}

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

.faq details p {
  margin: -4px 0 20px;
  padding-right: 40px;
}

.notice {
  padding: 28px 30px;
  background: linear-gradient(135deg, #f1fbf9, #eef9ff);
  border-radius: 14px;
}

.notice ul {
  margin: 0;
  padding-left: 1.4em;
}

.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 32px;
  padding: 36px;
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: 18px;
}

.contact-panel h2 {
  margin-bottom: 8px;
}

.contact-panel p {
  margin: 0;
}

.contact-meta {
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 9em 1fr;
}

.contact-meta dt,
.contact-meta dd {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.contact-meta dt {
  font-weight: 800;
}

.contact-meta dd {
  margin: 0;
  color: var(--muted);
}

.contact-note {
  margin-top: 24px !important;
}

.mail-visual {
  width: 126px;
  height: auto;
  align-self: center;
}

.policy {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.policy h2 {
  font-size: 1.35rem;
}

.policy ul {
  padding-left: 1.4em;
}

.site-footer {
  padding: 42px 0;
  background: linear-gradient(135deg, #fff0f3, #eef9ff);
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  font-size: 0.88rem;
  font-weight: 700;
}

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

.copyright {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 0.8rem;
}

:focus-visible {
  outline: 3px solid rgba(84, 189, 174, 0.45);
  outline-offset: 4px;
}

@media (max-width: 860px) {
  .features {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 0;
  }

  .feature + .feature {
    border-left: 0;
  }

  .feature:nth-child(even) {
    border-left: 1px solid var(--line);
  }

  .privacy-panel {
    grid-template-columns: auto 1fr;
  }

  .privacy-panel .text-link {
    grid-column: 2;
  }
}

@media (max-width: 640px) {
  :root {
    --page: min(100% - 28px, 1120px);
  }

  .nav {
    min-height: 62px;
  }

  .brand {
    font-size: 1rem;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  .nav-links {
    gap: 16px;
    font-size: 0.78rem;
  }

  .nav-links a:first-child {
    display: none;
  }

  .hero {
    padding: 70px 0 58px;
  }

  .hero h1 {
    font-size: clamp(3rem, 18vw, 5rem);
  }

  .hero-lead {
    font-size: 1.35rem;
  }

  .product-visual {
    width: min(100% - 12px, 520px);
    margin-top: 42px;
    border-radius: 16px;
  }

  .section {
    padding: 70px 0;
  }

  .features {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .feature {
    padding: 0 16px;
  }

  .feature:nth-child(even) {
    border-left: 0;
  }

  .privacy-panel {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .privacy-symbol {
    margin: auto;
  }

  .privacy-panel .text-link {
    grid-column: auto;
  }

  .page-hero {
    padding: 58px 0 52px;
  }

  .page-title-with-image {
    grid-template-columns: 1fr auto;
    gap: 12px;
    text-align: left;
  }

  .support-visual {
    width: 78px;
  }

  .content {
    width: min(100% - 28px, 860px);
    padding: 58px 0 76px;
  }

  .content > section + section {
    margin-top: 54px;
  }

  .contact-panel {
    grid-template-columns: 1fr;
    padding: 26px;
  }

  .mail-visual {
    width: 96px;
    justify-self: center;
  }

  .contact-meta {
    grid-template-columns: 1fr;
  }

  .contact-meta dt {
    padding-bottom: 0;
    border-bottom: 0;
  }

  .contact-meta dd {
    padding-top: 2px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}