*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
:root {
  --bg: #fff;
  --subtle: #f8f7fb;
  --muted: #f1f0f5;
  --ink: #111114;
  --soft: #4a4754;
  --quiet: #797687;
  --grape: #6d28d9;
  --grape-dark: #5b21b6;
  --border: #e4e3ea;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
body {
  color: var(--ink); background: var(--bg); line-height: 1.6;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
html[lang="ja"] body { font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", sans-serif; }
html[lang="ko"] body { font-family: "Apple SD Gothic Neo", -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif; word-break: keep-all; }
html[lang="zh-CN"] body { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; }
html[lang="zh-TW"] body { font-family: -apple-system, BlinkMacSystemFont, "PingFang TC", "Microsoft JhengHei", sans-serif; }
a { color: inherit; text-decoration: none; }
.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid var(--border); background: rgba(255,255,255,.96); backdrop-filter: blur(14px); }
.nav-inner { max-width: 1120px; height: 58px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: flex; align-items: center; gap: 9px; font-size: .95rem; font-weight: 700; }
.brand img { width: 24px; height: 24px; border-radius: 5px; }
.nav { display: flex; align-items: center; gap: 17px; color: var(--soft); font-size: .83rem; font-weight: 600; }
.nav a:hover, .locale-links a:hover, .text-link:hover { color: var(--grape); }
.download { padding: 7px 13px; border-radius: 8px; background: var(--ink); color: #fff !important; }
.download:hover { background: var(--grape); }
.hero { padding: 68px 24px 76px; border-bottom: 1px solid var(--border); }
.hero-inner { max-width: 1120px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 58px; align-items: center; }
.eyebrow { margin-bottom: 13px; color: var(--grape); font: 700 .74rem/1.2 var(--mono); letter-spacing: .07em; }
h1 { max-width: 560px; font-size: clamp(2.25rem, 5vw, 3.55rem); line-height: 1.12; letter-spacing: -.045em; }
.lead { margin: 22px 0 28px; color: var(--soft); font-size: 1.04rem; line-height: 1.75; }
.actions { display: flex; flex-wrap: wrap; gap: 11px; align-items: center; }
.primary, .secondary { display: inline-flex; align-items: center; justify-content: center; border-radius: 9px; padding: 11px 18px; font-size: .9rem; font-weight: 700; }
.primary { background: var(--grape); color: #fff; }
.primary:hover { background: var(--grape-dark); }
.secondary { gap: 8px; border: 1px solid var(--border); background: #fff; }
.secondary svg { width: 16px; height: 16px; flex: none; }
.secondary:hover { background: var(--subtle); }
.meta { margin-top: 18px; color: var(--quiet); font-size: .79rem; }
.hero-figure { margin: 0; }
.hero-figure img { display: block; width: 100%; height: auto; border-radius: 12px; box-shadow: 0 18px 50px rgba(35,25,65,.13); }
.hero-figure figcaption { margin-top: 13px; color: var(--quiet); font-size: .75rem; text-align: right; }
.hero-figure figcaption a { color: var(--grape); }
.section { padding: 72px 24px; border-bottom: 1px solid var(--border); }
.section-inner { max-width: 1120px; margin: 0 auto; }
.section-kicker { color: var(--grape); font: 700 .74rem/1 var(--mono); letter-spacing: .07em; }
.section h2 { margin-top: 12px; font-size: clamp(1.9rem, 4vw, 2.75rem); line-height: 1.18; letter-spacing: -.035em; }
.feature-list { margin-top: 44px; border-top: 1px solid var(--border); }
.feature-row { display: grid; grid-template-columns: 60px minmax(180px,.75fr) minmax(0,1.25fr); gap: 26px; padding: 26px 0; border-bottom: 1px solid var(--border); align-items: start; }
.feature-num { color: var(--grape); font: 700 .85rem/1.5 var(--mono); }
.feature-row h3 { font-size: 1.04rem; }
.feature-row p { color: var(--soft); font-size: .92rem; }
.guide-links { margin-top: 30px; display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); column-gap: 36px; border-top: 1px solid var(--border); }
.guide-link { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 0 4px; font-size: .96rem; font-weight: 700; }
.guide-link::after { content: "→"; color: var(--grape); font-size: 1.1rem; transition: transform .16s ease; }
.guide-link:hover { color: var(--grape); }
.guide-link:hover::after { transform: translateX(3px); }
.faq { background: var(--subtle); }
.faq-grid { margin-top: 36px; display: grid; gap: 0; border-top: 1px solid var(--border); }
.faq details { padding: 20px 0; border-bottom: 1px solid var(--border); }
.faq summary { cursor: pointer; list-style: none; font-weight: 700; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--quiet); }
.faq details[open] summary::after { content: "−"; }
.faq details p { max-width: 800px; margin-top: 12px; color: var(--soft); font-size: .93rem; }
.release-list { margin-top: 38px; border-top: 1px solid var(--border); }
.release-row { display: grid; grid-template-columns: 92px minmax(180px,.65fr) minmax(0,1.35fr); gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--border); align-items: start; }
.release-version { color: var(--grape); font: 700 .8rem/1.5 var(--mono); }
.release-row h3 { font-size: 1rem; }
.release-row p { color: var(--soft); font-size: .9rem; }
.credits { padding: 28px 24px; border-bottom: 1px solid var(--border); color: var(--soft); font-size: .86rem; }
.credits-inner, .footer-inner { max-width: 1120px; margin: 0 auto; }
.credits a { color: var(--grape); font-weight: 650; }
.site-footer { padding: 30px 24px 42px; }
.footer-inner { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; color: var(--quiet); font-size: .79rem; }
.footer-links, .locale-links { display: flex; gap: 13px; flex-wrap: wrap; }
.locale-links { width: 100%; padding-top: 18px; margin-top: 4px; border-top: 1px solid var(--border); }
code { padding: 2px 5px; border-radius: 4px; background: var(--muted); font: .88em/1.4 var(--mono); }
@media (max-width: 780px) {
  .nav > a:not(.download):not(:first-child) { display: none; }
  .hero { padding-top: 42px; }
  .hero-inner { grid-template-columns: 1fr; gap: 38px; }
  .feature-row { grid-template-columns: 42px 1fr; gap: 12px; }
  .feature-row p { grid-column: 2; }
  .guide-links { grid-template-columns: 1fr; column-gap: 0; }
  .guide-link { padding: 18px 0; border-bottom: 1px solid var(--border); }
  .release-row { grid-template-columns: 76px 1fr; gap: 12px; }
  .release-row p { grid-column: 2; }
}