:root {
  --ivory: #fff9e9;
  --paper: #fffef9;
  --ink: #29323e;
  --muted: #69727c;
  --coral: #ff6b61;
  --yellow: #ffd64f;
  --mint: #72ddb7;
  --blue: #52a3ef;
  --line: rgba(41, 50, 62, 0.12);
  --shadow: 0 20px 55px rgba(41, 50, 62, 0.1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--ivory);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { display: block; max-width: 100%; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1180px;
  margin: 0 auto;
  padding: 18px 28px;
  background: rgba(255, 249, 233, 0.86);
  backdrop-filter: blur(18px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.02em;
}
.brand img { border-radius: 12px; box-shadow: 0 5px 14px rgba(41, 50, 62, 0.14); }
.brand small { margin-left: 5px; color: var(--muted); font-size: 12px; font-weight: 700; }
nav { display: flex; gap: 25px; }
nav a { color: var(--muted); font-size: 14px; font-weight: 700; text-decoration: none; }
nav a:hover { color: var(--coral); }

main { overflow: hidden; }
.hero {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  align-items: center;
  gap: 50px;
  max-width: 1180px;
  min-height: 660px;
  margin: 0 auto;
  padding: 65px 40px 95px;
}
.eyebrow { margin: 0 0 10px; color: var(--coral); font-size: 12px; font-weight: 900; letter-spacing: 0.14em; }
.hero h1 { margin: 0; font-size: clamp(43px, 6vw, 76px); line-height: 1.22; letter-spacing: -0.045em; }
.hero h1 span { position: relative; z-index: 1; }
.hero h1 span::after {
  position: absolute;
  z-index: -1;
  right: -4px;
  bottom: 2px;
  left: -4px;
  height: 18px;
  border-radius: 99px;
  background: var(--yellow);
  content: "";
}
.lead { max-width: 580px; margin: 28px 0 0; color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 800;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}
.button:hover { transform: translateY(-2px); }
.button.primary { color: white; background: var(--coral); box-shadow: 0 12px 28px rgba(255, 107, 97, 0.28); }
.button.secondary { border: 2px solid var(--line); background: var(--paper); }
.button.dark { color: white; background: var(--ink); white-space: nowrap; }

.hero-art { position: relative; min-height: 450px; }
.sun { position: absolute; inset: 35px 5px auto auto; width: 330px; height: 330px; border-radius: 50%; background: var(--yellow); }
.icon-card {
  position: absolute;
  z-index: 2;
  top: 77px;
  left: 50%;
  width: 270px;
  padding: 25px;
  border: 8px solid rgba(255,255,255,0.7);
  border-radius: 63px;
  background: white;
  box-shadow: var(--shadow);
  transform: translateX(-50%) rotate(-3deg);
}
.icon-card img { border-radius: 43px; }
.bubble { position: absolute; z-index: 3; display: grid; width: 88px; height: 88px; place-items: center; border: 6px solid var(--ivory); border-radius: 50%; font-size: 36px; font-weight: 800; box-shadow: var(--shadow); }
.bubble-one { right: 0; bottom: 68px; background: var(--mint); transform: rotate(8deg); }
.bubble-two { bottom: 10px; left: 13px; background: var(--blue); transform: rotate(-8deg); }

.feature-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  max-width: 1100px;
  margin: -32px auto 0;
  padding: 24px;
  border-radius: 30px;
  background: var(--paper);
  box-shadow: var(--shadow);
}
.feature-strip article { display: flex; align-items: center; gap: 14px; padding: 10px; }
.feature-strip h2 { margin: 0; font-size: 17px; }
.feature-strip p { margin: 1px 0 0; color: var(--muted); font-size: 13px; line-height: 1.5; }
.feature-icon { display: grid; flex: 0 0 auto; width: 48px; height: 48px; place-items: center; border-radius: 16px; font-size: 18px; font-weight: 900; }
.coral { background: var(--coral); color: white; }
.mint { background: var(--mint); }
.blue { background: var(--blue); }

.section { max-width: 1140px; margin: 0 auto; padding: 125px 40px 40px; }
.section-heading { max-width: 670px; margin: 0 auto 42px; text-align: center; }
.section-heading.left { margin-left: 0; text-align: left; }
.section-heading h2, .contact-card h2 { margin: 0; font-size: clamp(31px, 4vw, 48px); letter-spacing: -0.03em; line-height: 1.3; }
.section-heading > p:last-child { color: var(--muted); }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.step { min-height: 250px; padding: 28px; border-radius: 30px; box-shadow: 0 13px 30px rgba(41, 50, 62, 0.08); }
.step.yellow { background: var(--yellow); }
.step.mint { background: var(--mint); }
.step.blue { background: var(--blue); }
.step span { display: grid; width: 45px; height: 45px; place-items: center; border-radius: 50%; background: rgba(255,255,255,0.8); font-weight: 900; }
.step h3 { margin: 37px 0 8px; font-size: 21px; }
.step p { margin: 0; color: rgba(41, 50, 62, 0.76); font-size: 14px; }

.faq-section { max-width: 920px; }
.platform-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.platform-card { padding: 30px; border: 1px solid var(--line); border-top: 6px solid var(--coral); border-radius: 28px; background: var(--paper); }
.platform-card:last-child { border-top-color: var(--mint); }
.platform-card h3 { margin: 0 0 22px; font-size: 25px; }
.platform-card h3 span { display: block; color: var(--muted); font-size: 13px; font-weight: 500; }
.platform-card dl { margin: 0; }
.platform-card dt { margin-top: 18px; font-weight: 800; }
.platform-card dd { margin: 5px 0 0; color: var(--muted); font-size: 15px; }
.platform-note { margin-top: 22px; color: var(--muted); font-size: 14px; }
section[id] { scroll-margin-top: 90px; }
.faq-list { display: grid; gap: 13px; }
details { border: 1px solid var(--line); border-radius: 20px; background: var(--paper); }
summary { position: relative; padding: 22px 58px 22px 24px; cursor: pointer; list-style: none; font-weight: 800; }
summary::-webkit-details-marker { display: none; }
summary::after { position: absolute; top: 50%; right: 24px; color: var(--coral); content: "+"; font-size: 27px; transform: translateY(-50%); }
details[open] summary::after { content: "−"; }
details p { margin: 0; padding: 0 24px 23px; color: var(--muted); font-size: 15px; }

.contact-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 35px;
  max-width: 1060px;
  margin: 115px auto;
  padding: 46px 50px;
  border-radius: 34px;
  background: var(--mint);
}
.contact-card p:not(.eyebrow) { margin-bottom: 0; color: rgba(41, 50, 62, 0.72); }

footer { display: grid; grid-template-columns: 1fr auto; gap: 20px; max-width: 1120px; margin: 0 auto; padding: 40px 30px 55px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
footer strong { display: block; color: var(--ink); font-size: 16px; }
footer span { font-size: 12px; }
.footer-links { display: flex; gap: 20px; }
footer > p { grid-column: 1 / -1; margin: 0; }

.policy-wrap { max-width: 900px; margin: 0 auto; padding: 75px 28px 110px; }
.policy-heading { margin-bottom: 35px; }
.policy-heading h1 { margin: 0; font-size: clamp(37px, 6vw, 59px); line-height: 1.3; letter-spacing: -0.04em; }
.policy-heading > p:last-child { color: var(--muted); }
.policy-card { padding: clamp(26px, 6vw, 58px); border-radius: 32px; background: var(--paper); box-shadow: var(--shadow); }
.policy-card h2 { margin: 45px 0 11px; padding-top: 5px; font-size: 21px; }
.policy-card h2:first-of-type { margin-top: 30px; }
.policy-card p, .policy-card li { color: #505a65; font-size: 15px; }
.policy-card a, .back-link a { color: #2578bd; font-weight: 700; text-underline-offset: 3px; }
.email-link { display: inline-block; overflow-wrap: anywhere; }
.back-link { margin-top: 28px; }

@media (max-width: 800px) {
  .site-header { padding: 14px 18px; }
  nav a:not(:last-child) { display: none; }
  .hero { grid-template-columns: 1fr; gap: 10px; min-height: auto; padding: 62px 24px 90px; }
  .hero-art { min-height: 380px; }
  .sun { right: 50%; width: 280px; height: 280px; transform: translateX(50%); }
  .icon-card { top: 58px; width: 230px; padding: 20px; border-radius: 54px; }
  .icon-card img { border-radius: 37px; }
  .bubble { width: 72px; height: 72px; font-size: 29px; }
  .bubble-one { right: 7%; }
  .bubble-two { left: 7%; }
  .feature-strip { grid-template-columns: 1fr; margin: -45px 18px 0; }
  .section { padding: 95px 20px 20px; }
  .steps { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: 1fr; }
  .step { min-height: 205px; }
  .step h3 { margin-top: 25px; }
  .contact-card { align-items: flex-start; flex-direction: column; margin: 90px 18px; padding: 35px 28px; }
  .contact-card .button { width: 100%; }
  footer { grid-template-columns: 1fr; margin: 0 18px; }
  .footer-links { flex-direction: column; gap: 4px; }
  footer > p { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}