:root {
  color-scheme: light dark;
  --page: #F3EFE8;
  --card: #FFFFFF;
  --art: #FCFAF7;
  --ink: #1C1A17;
  --soft: #4A453F;
  --faint: #857D73;
  --tint: #F6F1EA;
  --rule: #E6DED2;
  --accent: #AD4100;
  --button: #1C1A17;
  --button-ink: #FFFFFF;
  --focus: rgba(173, 65, 0, 0.28);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --leading: 1.65;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #161412;
    --card: #211F1C;
    --ink: #F3EFE9;
    --soft: #C9C1B6;
    --faint: #9A9186;
    --tint: #2B2824;
    --rule: #3A3631;
    --accent: #FF9A5C;
    --button: #F3EFE9;
    --button-ink: #1C1A17;
    --focus: rgba(255, 154, 92, 0.35);
  }
}

:lang(ja) {
  --font: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, "Noto Sans JP", "Noto Sans CJK JP", sans-serif;
  --leading: 1.85;
  word-break: auto-phrase;
}

:lang(zh) {
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Noto Sans CJK SC", sans-serif;
  --leading: 1.85;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--font);
  line-height: var(--leading);
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--accent); }

a:focus-visible,
.button:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 6px;
}

.shell {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 760px;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0 auto;
  padding: 24px 16px 32px;
}

main {
  display: grid;
  gap: 20px;
}

.top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
  padding: 0 6px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand img {
  display: block;
  border-radius: 7px;
}

.languages {
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
}

.languages a {
  display: block;
  padding: 4px 10px;
  border-radius: 999px;
  color: var(--soft);
  text-decoration: none;
}

.languages a:hover { background: var(--tint); }

.languages a[aria-current="page"] {
  background: var(--card);
  color: var(--ink);
  font-weight: 600;
}

.card {
  padding: 12px;
  border-radius: 24px;
  background: var(--card);
  box-shadow: 0 1px 2px rgba(28, 26, 23, 0.04), 0 12px 32px rgba(28, 26, 23, 0.06);
}

.art {
  overflow: hidden;
  border-radius: 16px;
  background: var(--art);
}

.art img {
  display: block;
  width: 100%;
  height: auto;
}

.hero .content { padding: 24px 20px 20px; }

h1 {
  margin: 0;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.lead {
  max-width: 60ch;
  margin: 14px 0 0;
  color: var(--soft);
  font-size: 17px;
}

.stores {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  flex: 1 1 200px;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  border-radius: 999px;
  background: var(--button);
  color: var(--button-ink);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.3;
  text-align: center;
  text-decoration: none;
  transition: transform 0.15s ease;
}

.button:hover { transform: translateY(-1px); }

.button.quiet {
  border: 1.5px solid var(--rule);
  background: transparent;
  color: var(--ink);
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.features li {
  padding: 18px 20px;
  border-radius: 18px;
  background: var(--card);
}

.features h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
}

.features p {
  margin: 6px 0 0;
  color: var(--soft);
  font-size: 15px;
}

.document { padding: 28px 24px 24px; }

.updated {
  margin: 8px 0 0;
  color: var(--faint);
  font-size: 14px;
}

.document h2 {
  margin: 36px 0 0;
  font-size: 20px;
  line-height: 1.4;
}

.document h3 {
  margin: 24px 0 0;
  font-size: 16px;
  line-height: 1.45;
}

.document p,
.document li {
  max-width: 68ch;
  font-size: 16px;
}

.document p { margin: 10px 0 0; }

.document ul,
.document ol {
  margin: 10px 0 0;
  padding-left: 1.3em;
}

.document li + li { margin-top: 6px; }

.summary {
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: 14px;
  background: var(--tint);
}

.summary p { margin: 0; }

.services {
  display: grid;
  gap: 10px;
  margin: 14px 0 0;
}

.services div {
  padding: 14px 16px;
  border: 1px solid var(--rule);
  border-radius: 14px;
}

.services dt { font-weight: 700; }

.services dd {
  margin: 4px 0 0;
  color: var(--soft);
  font-size: 15px;
}

.steps li::marker { font-weight: 700; }

.path { font-weight: 600; }

.mail {
  display: inline-block;
  margin-top: 10px;
  padding: 6px 14px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--tint);
  font-weight: 600;
  text-decoration: none;
}

.centered {
  padding: 12px;
  text-align: center;
}

.centered .content { padding: 22px 16px 16px; }

.centered .lead { margin-inline: auto; }

.centered .stores {
  justify-content: center;
  max-width: 460px;
  margin-inline: auto;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 18px;
  margin-top: auto;
  padding: 12px 6px 0;
  color: var(--faint);
  font-size: 14px;
}

.footer a {
  color: var(--soft);
  text-decoration: none;
}

.footer a:hover { text-decoration: underline; }

@media (min-width: 640px) {
  .shell { padding-top: 36px; }
  .hero .content { padding: 28px 28px 24px; }
  h1 { font-size: 32px; }
  .document { padding: 36px 40px 32px; }
}

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