:root {
  --red: #b5293b;
  --red-d: #8f1f2e;
  --ink: #2b2b2e;
  --sub: #5e5e66;
  --line: #e4e4e8;
  --bg: #ffffff;
  --bg2: #f6f6f8;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; color: var(--ink); background: var(--bg);
  font-family: "Noto Sans JP", "Hiragino Sans", "Yu Gothic UI", "Meiryo", system-ui, sans-serif;
  line-height: 1.75; font-size: 16px;
}
a { color: var(--red); }
a:hover { color: var(--red-d); }
.in { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

.top { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.94); border-bottom: 1px solid var(--line); backdrop-filter: blur(6px); }
.top .in { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 700; }
.top nav { display: flex; gap: 20px; }
.top nav a { color: var(--sub); text-decoration: none; font-size: 14px; }
.top nav a:hover { color: var(--red); }

.hero { padding: 56px 0 40px; }
.hero .in { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; }
.eyebrow { margin: 0 0 6px; color: var(--sub); letter-spacing: .08em; font-size: 13px; }
h1 { margin: 0 0 16px; font-size: 40px; line-height: 1.35; }
h1 em { font-style: normal; color: var(--red); }
.lead { color: var(--sub); margin: 0 0 22px; }
.mark { width: min(300px, 100%); height: auto; justify-self: center; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 10px 22px; border-radius: 999px; border: 1px solid var(--line);
  background: #fff; color: var(--ink); text-decoration: none; font-weight: 600; font-size: 15px;
}
.btn:hover { border-color: var(--red); color: var(--red); }
.btn.primary { background: var(--red); border-color: var(--red); color: #fff; }
.btn.primary:hover { background: var(--red-d); color: #fff; }

.band { padding: 56px 0; }
.band.alt { background: var(--bg2); }
h2 { margin: 0 0 24px; font-size: 26px; }
h2::after { content: ""; display: block; width: 40px; height: 3px; background: var(--red); margin-top: 8px; border-radius: 2px; }
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.cards.two { grid-template-columns: 1fr; max-width: 620px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 22px 22px 20px; display: flex; flex-direction: column; }
.card h3 { margin: 2px 0 8px; font-size: 20px; }
.card p { margin: 0 0 14px; color: var(--sub); font-size: 15px; }
.card .tag { margin: 0; font-size: 12px; color: var(--red); font-weight: 700; letter-spacing: .04em; }
.card .more { margin-top: auto; font-weight: 600; text-decoration: none; font-size: 15px; }
.others { margin-top: 28px; }
.others h3 { font-size: 17px; margin: 0 0 6px; }
.others ul { margin: 0 0 8px; padding-left: 20px; color: var(--sub); }
.muted { color: var(--sub); }

.facts { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.facts th, .facts td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); vertical-align: top; font-size: 15px; }
.facts tr:last-child th, .facts tr:last-child td { border-bottom: 0; }
.facts th { width: 150px; background: var(--bg2); font-weight: 600; }

.contact { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.contact p { color: var(--sub); margin: 0; max-width: 560px; }

.doc { padding: 40px 0 64px; }
.doc .in { max-width: 820px; }
.doc h1 { font-size: 30px; }
.doc h2 { font-size: 20px; margin: 32px 0 10px; }
.doc h2::after { display: none; }
.doc p, .doc li { color: var(--ink); font-size: 15px; }

.foot { border-top: 1px solid var(--line); padding: 24px 0 40px; font-size: 13px; color: var(--sub); }
.foot .in { display: flex; gap: 20px; flex-wrap: wrap; }
.foot a { color: var(--sub); }

@media (max-width: 820px) {
  .hero .in { grid-template-columns: 1fr; }
  .mark { width: 200px; order: -1; }
  h1 { font-size: 30px; }
  .cards { grid-template-columns: 1fr; }
  .top nav { gap: 14px; }
  .facts th { width: 100px; }
}
@media (max-width: 560px) {
  .top nav { gap: 12px; }
  .top nav a { font-size: 13px; white-space: nowrap; }
  .top nav a[href$="#products"], .top nav a[href$="#about"] { display: none; }
  .brand span { font-size: 15px; white-space: nowrap; }
}