:root {
  color-scheme: light;
  --yellow: #ffd52b;
  --ink: #191919;
  --muted: #62646b;
  --paper: #ffffff;
  --ground: #f5f5f6;
  --line: #e8e8eb;
  --tint: #fff8d8;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 2rem; }
body { margin: 0; font-size: 16px; line-height: 1.8; }
::selection { color: var(--ink); background: var(--yellow); }
a { color: inherit; text-underline-offset: .25em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--ink); outline-offset: 4px; border-radius: 2px; }
.wrap { width: min(100% - 64px, 1080px); margin-inline: auto; }
.skip { position: absolute; z-index: 10; top: -100px; left: 16px; padding: 10px 16px; background: var(--yellow); }
.skip:focus { top: 12px; }
.site-header { border-bottom: 1px solid var(--line); }
.header-inner { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { text-decoration: none; font-size: 25px; font-weight: 750; letter-spacing: -.035em; line-height: 1.2; }
.brand span { display: inline-block; padding: 6px 9px 7px; background: var(--yellow); border-radius: 8px; }
.site-nav { display: flex; align-items: center; gap: 26px; flex-wrap: wrap; }
.site-nav a { display: inline-flex; align-items: center; min-height: 44px; text-decoration: none; font-size: 14px; }
.site-nav a:hover, .site-nav a[aria-current="page"] { text-decoration: underline; text-decoration-thickness: 2px; }
.review-note { margin: 0; background: var(--ground); color: var(--muted); font-size: 12px; line-height: 1.6; padding-block: 9px; }
.hero { padding-block: 72px 66px; max-width: 850px; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 24px; font-size: clamp(34px, 4.7vw, 56px); font-weight: 750; letter-spacing: -.035em; line-height: 1.25; text-wrap: balance; }
h2 { font-size: 25px; font-weight: 700; letter-spacing: -.02em; line-height: 1.4; margin-bottom: 18px; }
h3 { font-size: 18px; font-weight: 700; line-height: 1.5; margin-bottom: 10px; }
p { margin-bottom: 18px; }
.hero .intro { max-width: 36em; font-size: 20px; line-height: 1.85; margin-bottom: 28px; }
.hero h1 span { padding-inline: 6px; background: var(--yellow); box-decoration-break: clone; -webkit-box-decoration-break: clone; }
.text-links { display: flex; gap: 24px; flex-wrap: wrap; }
.text-links a { padding-block: 6px; font-size: 15px; font-weight: 650; }
.product-flow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin: 0; padding-block: 35px 40px; border-block: 1px solid var(--line); }
.product-flow dt { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.product-flow dd { margin: 0; color: var(--muted); font-size: 15px; }
.home-information { display: grid; grid-template-columns: 1.25fr 1fr; gap: 72px; padding-block: 58px 68px; }
.home-information p { color: var(--muted); font-size: 15px; }
.home-information h2 { font-size: 22px; }
.document { max-width: 760px; margin-inline: auto; padding-block: 60px 72px; }
.document h1 { font-size: 40px; margin-bottom: 14px; }
.document .lead { font-size: 18px; line-height: 1.85; margin-bottom: 18px; }
.meta { font-size: 13px; color: var(--muted); margin-bottom: 26px; }
.contents { padding: 22px 26px; background: var(--ground); border-radius: 12px; margin-block: 28px 40px; }
.contents h2 { font-size: 16px; margin-bottom: 8px; }
.contents ul { display: flex; gap: 6px 24px; flex-wrap: wrap; list-style: none; padding: 0; margin: 0; }
.contents a { display: inline-flex; align-items: center; min-height: 34px; font-size: 14px; }
.document section { margin-top: 42px; }
.document section h2 { font-size: 22px; }
.document section h3 { margin-top: 26px; }
.document ul, .document ol { padding-left: 1.45em; margin-block: 14px 20px; }
.document li { padding-left: 3px; margin-bottom: 10px; }
.document li::marker { color: var(--ink); }
.document .callout { padding: 22px 26px; border-radius: 12px; background: var(--tint); }
.callout p:last-child { margin-bottom: 0; }
.english { border-top: 1px solid var(--line); padding-top: 35px; }
.english p { font-size: 15px; line-height: 1.85; }
.contact-link { overflow-wrap: anywhere; }
.document .support-email { display: inline-block; margin-bottom: 14px; font-size: 21px; font-weight: 650; }
.site-footer { background: var(--ground); padding-block: 32px 36px; }
.footer-inner { display: flex; justify-content: space-between; gap: 28px; }
.footer-brand { font-weight: 750; font-size: 17px; margin-bottom: 8px; }
.footer-copy { margin: 0; font-size: 12px; line-height: 1.9; color: var(--muted); }
.footer-links { display: flex; gap: 20px; align-items: flex-start; flex-wrap: wrap; }
.footer-links a { font-size: 13px; min-height: 40px; display: inline-flex; align-items: center; }

@media (max-width: 700px) {
  .wrap { width: calc(100% - 40px); }
  .header-inner { min-height: auto; padding-block: 20px 12px; align-items: flex-start; flex-direction: column; gap: 9px; }
  .brand { font-size: 24px; }
  .site-nav { width: 100%; justify-content: space-between; gap: 0 16px; }
  .site-nav a { min-height: 42px; }
  .review-note { font-size: 11px; }
  .hero { padding-block: 42px 38px; }
  .hero h1 { font-size: 36px; letter-spacing: -.03em; margin-bottom: 22px; }
  .hero .intro { font-size: 17px; line-height: 1.9; }
  .text-links { gap: 10px 24px; }
  .product-flow { grid-template-columns: 1fr; gap: 26px; padding-block: 30px; }
  .product-flow dt { margin-bottom: 5px; }
  .home-information { grid-template-columns: 1fr; gap: 25px; padding-block: 38px 40px; }
  .document { padding-block: 38px 48px; }
  .document h1 { font-size: 32px; }
  .document .lead { font-size: 17px; }
  .contents { padding: 18px 20px; margin-block: 25px 30px; }
  .contents ul { gap: 3px 20px; }
  .document section { margin-top: 34px; }
  .document section h2 { font-size: 21px; }
  .document .callout { padding: 20px; }
  .document .support-email { font-size: 18px; }
  .footer-inner { flex-direction: column; gap: 13px; }
  .footer-links { gap: 10px 22px; }
}

@media (max-width: 360px) {
  .wrap { width: calc(100% - 32px); }
  .hero h1 { font-size: 32px; }
  .site-nav a { font-size: 13px; }
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}