:root {
  --fg: #202124; --muted: #5f6368; --bg: #ffffff; --band: #f3f6fc; --line: #dadce0;
  --accent: #1a73e8; --accent-strong: #0b57d0; --on-accent: #ffffff; --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root { --fg: #e8eaed; --muted: #9aa0a6; --bg: #17181b; --band: #1f2125; --line: #3c4043;
          --accent: #8ab4f8; --accent-strong: #a8c7fa; --on-accent: #0b1f3a; --card: #24262b; }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.8 "Hiragino Sans", "Noto Sans JP", "Noto Sans", system-ui, -apple-system, "Segoe UI", sans-serif; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-strong); }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; background: var(--bg); padding: 8px 12px; z-index: 10; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.top { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.bar { display: flex; align-items: center; gap: 24px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--fg); font-weight: 800; font-size: 22px; }
.brand svg { width: 36px; height: 36px; }
.links { display: flex; gap: 20px; margin-right: auto; }
.links a { color: var(--fg); text-decoration: none; font-size: 15px; }
.links a:hover { color: var(--accent-strong); }
.actions { display: flex; align-items: center; gap: 12px; }
.lang select { font: inherit; font-size: 14px; padding: 6px 8px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); color: var(--fg); min-height: 40px; }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 20px;
  border-radius: 999px; font-weight: 700; text-decoration: none; font-size: 15px; border: 2px solid transparent; }
.btn.primary { background: var(--accent); color: var(--on-accent); }
.btn.primary:hover { background: var(--accent-strong); }
.btn.ghost { border-color: var(--accent); color: var(--accent-strong); }
.btn.big { min-height: 56px; padding: 0 28px; font-size: 17px; }
.btn:focus-visible, a:focus-visible, select:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

section { padding: 72px 0; }
.band { background: var(--band); }
h1, h2, h3, .lead, .eyebrow { word-break: auto-phrase; text-wrap: pretty; }
h1 { font-size: clamp(30px, 4.4vw, 48px); line-height: 1.3; margin: 8px 0 16px; letter-spacing: .01em; }
h2 { font-size: clamp(24px, 3vw, 32px); line-height: 1.4; margin: 0 0 28px; }
h3 { font-size: 19px; margin: 0 0 12px; line-height: 1.5; }
.eyebrow { color: var(--accent-strong); font-weight: 700; margin: 0; }
.lead { font-size: 18px; color: var(--muted); margin: 0 0 28px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }

.hero { padding-top: 56px; }
.hero-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 48px; align-items: center; }
.talk-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: center; }
.checks { padding-left: 1.2em; margin: 0; }
.checks li { margin-bottom: 8px; }
.how-grid { display: grid; grid-template-columns: .55fr 1fr; gap: 56px; align-items: center; }
.shot img { border-radius: 18px; border: 1px solid var(--line); box-shadow: 0 12px 40px rgba(0, 0, 0, .12); }
.shot.phone { max-width: 300px; margin: 0 auto; }
.shot.phone img { border-radius: 28px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px; }
.card ul { margin: 0; padding-left: 1.2em; }
.card li { margin-bottom: 8px; }
.card p { margin: 0; color: var(--muted); }

.steps { list-style: none; counter-reset: s; padding: 0; margin: 0 0 20px; }
.steps li { counter-increment: s; position: relative; padding: 0 0 20px 56px; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: 2px; width: 38px; height: 38px; border-radius: 50%;
  background: var(--accent); color: var(--on-accent); font-weight: 800; display: grid; place-items: center; }
.steps strong { display: block; font-size: 18px; }
.steps span { color: var(--muted); }
.note { color: var(--muted); font-size: 15px; }
.disclaimer { color: var(--muted); font-size: 14px; margin-top: 24px; }

.apps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 12px; }
.app { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; display: flex; flex-direction: column; }
.app strong { font-size: 18px; }
.app span { color: var(--muted); font-size: 15px; }

.final { text-align: center; }
.final h2 { margin-bottom: 20px; }

.foot { border-top: 1px solid var(--line); padding: 32px 0 40px; text-align: center; color: var(--muted); font-size: 14px; }
.foot nav { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: center; margin-bottom: 12px; }
.foot p { margin: 4px 0; }

@media (max-width: 900px) {
  .links { display: none; }
  .bar { justify-content: space-between; }
  .hero-grid, .how-grid, .talk-grid { grid-template-columns: 1fr; gap: 32px; }
  .cards, .apps { grid-template-columns: 1fr; }
  section { padding: 52px 0; }
}
@media (max-width: 420px) {
  .wrap { padding: 0 16px; }
  .brand span { display: none; }
  .btn.big { width: 100%; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }