:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --text: #1c2430;
  --muted: #5a6573;
  --line: #d8dee6;
  --accent: #2f6f8f;
  --accent-soft: #e7f1f6;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(28, 36, 48, 0.06);
  --font: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.inner { width: min(960px, calc(100% - 2rem)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(244,246,248,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: 0.75rem 0;
}
.brand { display: flex; align-items: center; gap: 0.75rem; }
.brand-mark {
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent); display: inline-block;
}
.brand-text { display: flex; flex-direction: column; }
.brand-name { font-weight: 700; font-size: 1rem; }
.brand-en { font-size: 0.75rem; color: var(--muted); }
.chip {
  font-size: 0.7rem; padding: 0.15rem 0.5rem; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); border: 1px solid #c5dbe6;
}
.nav { display: flex; gap: 0.9rem; flex-wrap: wrap; }
.nav a { color: var(--muted); font-size: 0.9rem; }
.hero { padding: 2.5rem 0 1.5rem; }
.hero-inner {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 1.5rem; align-items: center;
}
.hero-kicker { color: var(--muted); margin: 0 0 0.4rem; font-size: 0.85rem; }
.hero-title { margin: 0 0 0.6rem; font-size: clamp(1.6rem, 3vw, 2.2rem); }
.hero-lead { margin: 0 0 1rem; color: var(--muted); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.hero-meta { margin: 0.8rem 0 0; font-size: 0.8rem; color: var(--muted); }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.65rem 1rem; border-radius: 999px; font-weight: 600; font-size: 0.95rem;
  border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.05); text-decoration: none; }
.btn-ghost { background: var(--card); color: var(--accent); border-color: var(--line); }
.btn-ghost:hover { background: var(--accent-soft); text-decoration: none; }
.shot {
  background: #e8edf2; border: 1px dashed #b7c2ce; border-radius: var(--radius);
  display: grid; place-items: center; color: var(--muted); min-height: 160px;
  aspect-ratio: 16 / 9; box-shadow: var(--shadow);
}
.shot-label { font-size: 0.85rem; }
.section { padding: 2rem 0; }
.section-alt { background: #eef2f5; }
.section-title { margin: 0 0 0.75rem; font-size: 1.35rem; }
.section-lead { margin: 0 0 1rem; color: var(--muted); }
.feature-labels {
  list-style: none; padding: 0; margin: 0 0 1.2rem;
  display: flex; flex-wrap: wrap; gap: 0.5rem;
}
.feature-tag {
  display: inline-block; padding: 0.35rem 0.7rem; border-radius: 999px;
  background: var(--card); border: 1px solid var(--line); font-size: 0.85rem;
}
.card-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.9rem;
}
.info-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1rem; box-shadow: var(--shadow);
}
.info-card h3 { margin: 0 0 0.4rem; font-size: 1rem; }
.info-card p { margin: 0; color: var(--muted); font-size: 0.92rem; }
.dl-row { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-bottom: 0.6rem; }
.fine { color: var(--muted); font-size: 0.85rem; }
.steps { margin: 0; padding-left: 1.2rem; color: var(--muted); }
.steps li { margin: 0.4rem 0; }
.steps code {
  background: var(--accent-soft); padding: 0.1rem 0.35rem; border-radius: 4px; color: var(--text);
}
.notes-list { margin: 0; padding-left: 1.2rem; color: var(--muted); }
.site-footer {
  border-top: 1px solid var(--line); padding: 1.5rem 0 2rem;
  font-size: 0.8rem; color: var(--muted);
}
@media (max-width: 760px) {
  .hero-inner, .card-grid { grid-template-columns: 1fr; }
  .nav { display: none; }
}