:root {
  color-scheme: light dark;
  --blue: #007aff;
  --link: #0066d6;
  --bg: #fff;
  --surface: #f5f5f7;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --line: #dedee3;
  --tint: #edf5ff;
  --notice-bg: #f8f5ec;
  --notice-text: #655020;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-size: 16px; line-height: 1.65; -webkit-text-size-adjust: 100%; }
a { color: var(--link); text-underline-offset: .2em; }
a:hover { text-decoration-thickness: 2px; }
a, summary { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--link); outline-offset: 5px; border-radius: 3px; }
main:focus { outline: none; }
.container { width: min(100% - 64px, 1000px); margin-inline: auto; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -.035em; }
p + p { margin-top: 16px; }
.skip-link { position: absolute; top: 10px; left: 16px; z-index: 10; padding: 10px 18px; background: var(--bg); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.site-header { border-bottom: 1px solid var(--line); }
.header-inner { min-height: 80px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.wordmark { color: var(--text); font-size: 28px; font-weight: 750; letter-spacing: -.065em; text-decoration: none; line-height: 1.2; }
.wordmark span { color: var(--blue); }
nav { display: flex; gap: 28px; }
.site-header nav a { color: var(--muted); font-size: 14px; font-weight: 500; padding-block: 15px; text-decoration: none; }
.site-header nav a[aria-current="page"], .site-header nav a:hover { color: var(--link); }
.site-header nav a[aria-current="page"] { text-decoration: underline; text-underline-offset: 8px; }
.hero { text-align: center; padding-block: 100px 90px; }
.eyebrow { font-size: 12px; font-weight: 650; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.hero .eyebrow { color: var(--link); }
.hero h1 { font-size: clamp(46px, 7.3vw, 78px); font-weight: 730; letter-spacing: -.055em; margin-top: 25px; line-height: 1.04; }
.hero h1 span { color: var(--blue); }
.hero-description { font-size: 20px; max-width: 540px; margin: 28px auto 0; color: var(--muted); line-height: 1.6; }
.platform { margin-top: 28px; font-size: 13px; font-weight: 550; }
.status { display: inline-flex; align-items: center; gap: 9px; margin-top: 20px; border: 1px solid var(--line); padding: 8px 18px; border-radius: 30px; font-size: 13px; font-weight: 600; background: var(--surface); }
.status span { width: 6px; height: 6px; border-radius: 50%; background: var(--blue); }
.hero-note { margin-top: 14px; font-size: 12px; color: var(--muted); }
.features-section { background: var(--surface); padding-block: 64px 44px; }
.section-heading { text-align: center; }
.section-heading h2 { font-size: clamp(27px, 4vw, 36px); margin-top: 12px; }
.section-heading > p:last-child { color: var(--muted); margin-top: 14px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 36px; }
.feature-card { background: var(--bg); padding: 30px 26px 32px; border-radius: 20px; border: 1px solid var(--line); }
.feature-icon { width: 46px; height: 46px; display: grid; place-items: center; background: var(--tint); color: var(--link); border-radius: 12px; margin-bottom: 30px; }
.feature-icon svg { width: 30px; height: 30px; }
.feature-card h3 { font-size: 19px; letter-spacing: -.025em; }
.feature-card p { color: var(--muted); font-size: 15px; margin-top: 12px; }
.section-note { font-size: 12px; color: var(--muted); text-align: center; margin-top: 26px; }
.help-strip { padding-block: 55px; display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.help-strip h2 { font-size: 23px; }
.help-strip p { color: var(--muted); font-size: 14px; margin-top: 8px; }
.text-link { white-space: nowrap; text-decoration: none; font-weight: 550; font-size: 14px; }
.text-link:hover { text-decoration: underline; }
.text-link span { margin-left: 10px; }
.site-footer { background: var(--surface); border-top: 1px solid var(--line); padding-block: 38px 24px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.footer-inner .wordmark { font-size: 24px; }
.footer-inner p { font-size: 12px; color: var(--muted); margin-top: 9px; }
.site-footer nav { gap: 22px; flex-wrap: wrap; }
.site-footer nav a { color: var(--muted); font-size: 12px; padding-block: 10px; }
.copyright { font-size: 11px; color: var(--muted); border-top: 1px solid var(--line); margin-top: 27px; padding-top: 20px; }
.page-heading { padding-block: 62px 32px; }
.page-heading h1 { font-size: clamp(38px, 6vw, 54px); margin-top: 15px; }
.page-heading > p:last-child { color: var(--muted); margin-top: 18px; max-width: 560px; font-size: 18px; }
.legal { max-width: 760px; padding-bottom: 64px; }
.draft-notice { background: var(--notice-bg); color: var(--notice-text); border-left: 3px solid currentColor; border-radius: 0 12px 12px 0; padding: 20px 24px; font-size: 14px; }
.draft-notice p { margin-top: 7px; }
.contents { display: block; background: var(--surface); border-radius: 16px; padding: 24px 28px; margin-block: 32px 42px; }
.contents h2 { font-size: 18px; }
.contents ol { padding-left: 20px; margin-bottom: 0; columns: 2; column-gap: 35px; }
.contents li { break-inside: avoid; padding: 4px 0 4px 3px; font-size: 13px; }
.legal section { margin-top: 36px; scroll-margin-top: 24px; }
.legal section h2 { font-size: 23px; line-height: 1.3; margin-bottom: 16px; }
.legal section p { font-size: 15px; line-height: 1.85; }
.notice { background: var(--surface); padding: 16px 20px; border-radius: 12px; color: var(--muted); }
.legal a, .support a { overflow-wrap: anywhere; }
.legal-end { border-top: 1px solid var(--line); margin-top: 40px; padding-top: 24px; font-size: 14px; }
.support { max-width: 860px; padding-bottom: 70px; }
.contact-card { background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 32px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.contact-card h2 { font-size: 26px; margin-top: 10px; }
.contact-card p:last-child { margin-top: 12px; font-size: 14px; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 22px; background: #0066d6; color: #fff; font-size: 14px; font-weight: 600; border-radius: 30px; padding: 12px 22px; text-decoration: none; white-space: nowrap; }
.button:hover { background: #0056b5; }
.faq { margin-top: 55px; }
.faq > h2 { font-size: 30px; margin-top: 12px; margin-bottom: 24px; }
details { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; padding: 22px 28px 22px 0; font-weight: 600; font-size: 16px; line-height: 1.5; }
summary:hover { color: var(--link); }
details[open] summary { color: var(--link); }
.faq-answer { padding: 0 24px 24px 0; color: var(--muted); font-size: 15px; line-height: 1.8; }
.support-info { background: var(--surface); border-radius: 20px; padding: 32px; margin-top: 44px; }
.support-info h2 { font-size: 25px; margin-bottom: 14px; }
.support-info p, .support-info li { font-size: 14px; }
.support-info ul { padding-left: 20px; }
.privacy-reminder { border-top: 1px solid var(--line); padding-top: 18px; color: var(--muted); }
.privacy-reminder strong { color: var(--text); }
@media (prefers-color-scheme: dark) {
  :root { --bg: #121214; --surface: #1c1c1f; --text: #f5f5f7; --muted: #aaaab1; --line: #38383e; --blue: #459fff; --link: #75b7ff; --tint: #142c46; --notice-bg: #302a1c; --notice-text: #e4ca8d; }
}
@media (max-width: 700px) {
  .container { width: calc(100% - 40px); }
  .hero { padding-block: 70px 64px; }
  .hero-description { font-size: 18px; max-width: 430px; }
  .feature-grid { grid-template-columns: 1fr; gap: 14px; }
  .feature-card { padding: 26px; }
  .feature-icon { margin-bottom: 22px; }
  .features-section { padding-block: 45px 32px; }
  .help-strip { align-items: flex-start; flex-direction: column; gap: 18px; padding-block: 38px; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 20px; }
  .page-heading { padding-block: 42px 28px; }
  .contact-card { align-items: flex-start; flex-direction: column; padding: 26px; }
  .contents ol { columns: 1; }
  .support-info { padding: 26px; }
}
@media (max-width: 420px) {
  .header-inner { flex-wrap: wrap; justify-content: center; gap: 0; padding-top: 18px; }
  .site-header nav { width: 100%; justify-content: space-between; gap: 10px; }
  .site-header nav a { font-size: 13px; }
  .hero .eyebrow { font-size: 10px; letter-spacing: .08em; }
  .hero h1 { font-size: clamp(36px, 10.7vw, 46px); }
  .site-footer nav { gap: 18px; }
  .legal section h2 { font-size: 21px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}
@media print {
  .site-header, .site-footer, .skip-link, .contents { display: none; }
  :root { --text: #000; --muted: #333; --bg: #fff; --surface: #f5f5f7; --link: #000; }
  .container { width: 100%; }
  .legal { max-width: none; }
  h2, h3 { break-after: avoid; }
  details::details-content { content-visibility: visible; }
}