:root { --bg: #f6f7fb; --card: #ffffff; --text: #1f2430; --muted: #5b6272; --line: #e3e6ee; --accent: #4b6bdc; --on-accent: #ffffff; --hero: linear-gradient(160deg, #4b6bdc 0%, #6f8cf0 100%); }
@media (prefers-color-scheme: dark) {
  :root { --bg: #15171c; --card: #22252d; --text: #eceef3; --muted: #a3a9b6; --line: #343844; --accent: #8aa2ff; --on-accent: #10131a; --hero: linear-gradient(160deg, #26304f 0%, #1b2133 100%); }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Hiragino Sans", "PingFang SC", "Noto Sans JP", "Noto Sans SC", sans-serif; }
a { color: var(--accent); }
img { max-width: 100%; height: auto; }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }

.top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 12px; padding: 14px 0; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 18px; }
.brand img { width: 36px; height: 36px; border-radius: 9px; }
.langs { display: flex; gap: 6px; flex-wrap: wrap; }
.langs a { text-decoration: none; border: 1px solid var(--line); border-radius: 999px; padding: 2px 10px; font-size: 13px; background: var(--card); }
.langs a[aria-current] { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }

.hero { background: var(--hero); color: #fff; }
.hero .brand { color: #fff; }
.hero-grid { display: grid; gap: 24px; padding-top: 24px; }
.hero h1 { font-size: 28px; line-height: 1.35; margin: 0 0 12px; }
.hero p { margin: 0 0 20px; opacity: .92; }
.hero .shot { justify-self: center; width: 260px; margin-bottom: -60px; }
.hero .shot img { border-radius: 20px; box-shadow: 0 16px 40px rgba(0, 0, 0, .25); display: block; }

.cta { display: flex; flex-wrap: wrap; gap: 10px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-width: 150px; padding: 12px 18px; border-radius: 12px; font-weight: 600; text-decoration: none; background: #fff; color: #1f2430; border: 1px solid transparent; }
.btn.ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .7); }
.btn.solid { background: var(--accent); color: var(--on-accent); }
.btn.outline { background: var(--card); color: var(--accent); border-color: var(--accent); }

main.wrap { padding-top: 88px; padding-bottom: 24px; }
.feature { display: grid; gap: 20px; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 22px; margin-bottom: 20px; }
.feature h2 { font-size: 20px; line-height: 1.4; margin: 0 0 8px; }
.feature p { margin: 0; color: var(--muted); }
.feature ul { margin: 10px 0 0; padding-left: 1.2em; color: var(--muted); }
.feature li { margin: 2px 0; }
.feature figure { margin: 0; justify-self: center; width: 220px; }
.feature figure img { display: block; border-radius: 16px; border: 1px solid var(--line); }
.grid { display: grid; gap: 20px; margin-bottom: 20px; }
.grid .feature { margin-bottom: 0; }

.download { text-align: center; background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 28px 22px; }
.download h2 { margin: 0 0 8px; font-size: 22px; }
.download p { margin: 0 0 18px; color: var(--muted); }
.download .cta { justify-content: center; }

footer { color: var(--muted); font-size: 13px; text-align: center; padding: 28px 16px 40px; }
footer a { margin: 0 6px; }

@media (min-width: 760px) {
  .hero-grid { grid-template-columns: 1fr 300px; align-items: center; padding-top: 32px; }
  .hero h1 { font-size: 36px; }
  .hero .shot { width: 300px; margin-bottom: -80px; }
  main.wrap { padding-top: 112px; }
  .feature { grid-template-columns: 1fr 240px; padding: 32px; }
  .feature.flip { grid-template-columns: 240px 1fr; }
  .feature.flip figure { order: -1; }
  .feature figure { width: 240px; }
  .feature.solo { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr 1fr; }
}