/* LifeBook Design System (LDS) — 静的 LP 共通 */

:root {
  --paper: #fdfbf7;
  --ink: #2b2b2b;
  --ink-light: #5a5a5a;
  --ink-faint: #a0a0a0;
  --accent-blue: #2c4f7c;
  --amber: #d4a373;
  --shadow-paper: 0 4px 20px -2px rgba(43, 43, 43, 0.08);
  --radius: 3px;
  --font-serif: "Shippori Mincho", "Noto Serif JP", serif;
  --font-sans: "Inter", "Noto Sans JP", system-ui, sans-serif;
  --line: 1.85;
  --max: 42rem;
  --max-wide: 52rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: var(--line);
  color: var(--ink);
  background-color: var(--paper);
  -webkit-font-smoothing: antialiased;
}

/* わずかなノイズ（デジタルの冷たさを抑える） */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.035;
  z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.site-wrap {
  position: relative;
  z-index: 1;
}

.skip-link {
  position: absolute;
  left: 0.5rem;
  top: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--paper);
  color: var(--accent-blue);
  border: 1px solid var(--accent-blue);
  border-radius: var(--radius);
  text-decoration: none;
  font-size: 0.875rem;
  z-index: 100;
  transform: translateY(-120%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}

.site-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid rgba(43, 43, 43, 0.08);
  background: rgba(253, 251, 247, 0.92);
  backdrop-filter: blur(8px);
}

.site-header__inner {
  max-width: var(--max-wide);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
}

.site-brand {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
}

.site-brand:hover {
  color: var(--accent-blue);
}

.site-tag {
  font-size: 0.8125rem;
  color: var(--ink-light);
}

.hero {
  padding: 3rem 1.5rem 4rem;
  max-width: var(--max-wide);
  margin: 0 auto;
}

.hero__inner {
  max-width: var(--max);
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 600;
  line-height: 1.45;
  margin: 0 0 1.25rem;
  letter-spacing: 0.03em;
}

.hero__lead {
  margin: 0 0 2rem;
  color: var(--ink-light);
  font-size: 1.0625rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.section {
  padding: 2.5rem 1.5rem;
  max-width: var(--max-wide);
  margin: 0 auto;
}

.section--tight {
  padding-top: 1.5rem;
}

.section__title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  margin: 0 0 1.25rem;
  letter-spacing: 0.02em;
  scroll-margin-top: 5rem;
}

.section__sub {
  font-size: 1rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  color: var(--ink);
}

p {
  margin: 0 0 1rem;
}

.lead {
  font-size: 1.0625rem;
}

ul {
  margin: 0 0 1rem;
  padding-left: 1.35rem;
}

li {
  margin-bottom: 0.5rem;
}

li::marker {
  color: var(--amber);
}

.card {
  background: var(--paper);
  border: 1px solid rgba(43, 43, 43, 0.1);
  border-radius: var(--radius);
  box-shadow: var(--shadow-paper);
  padding: 1.5rem 1.35rem;
  margin-bottom: 1.25rem;
}

.card:last-child {
  margin-bottom: 0;
}

.card h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  margin: 0 0 0.65rem;
  font-weight: 600;
}

.price-block {
  text-align: center;
  padding: 2rem 1.25rem;
  border: 1px solid rgba(44, 79, 124, 0.2);
  border-radius: var(--radius);
  background: rgba(253, 251, 247, 0.8);
}

.price-block__label {
  font-size: 0.9375rem;
  color: var(--ink-light);
  margin-bottom: 0.5rem;
}

.price-block__amount {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 600;
  color: var(--accent-blue);
  letter-spacing: 0.04em;
}

.price-block__note {
  font-size: 0.875rem;
  color: var(--ink-light);
  margin-top: 0.75rem;
}

.faq details {
  border-bottom: 1px solid rgba(43, 43, 43, 0.1);
  padding: 1rem 0;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  padding-right: 1rem;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "＋";
  margin-left: auto;
  color: var(--accent-blue);
  font-weight: 400;
}

.faq details[open] summary::after {
  content: "－";
}

.faq details p {
  margin-top: 0.75rem;
  color: var(--ink-light);
  font-size: 0.98rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: 0.65rem 1.35rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius);
  border: 1px solid var(--accent-blue);
  background: var(--accent-blue);
  color: #fdfbf7;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  touch-action: manipulation;
  -webkit-tap-highlight-color: rgba(44, 79, 124, 0.15);
}

.btn:hover {
  background: #243f63;
  border-color: #243f63;
}

.btn:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 3px;
}

.btn--secondary {
  background: transparent;
  color: var(--accent-blue);
  border-color: rgba(44, 79, 124, 0.45);
}

.btn--secondary:hover {
  background: rgba(44, 79, 124, 0.06);
  border-color: var(--accent-blue);
}

.site-footer {
  margin-top: 3rem;
  padding: 2.5rem 1.5rem;
  border-top: 1px solid rgba(43, 43, 43, 0.1);
  font-size: 0.875rem;
  color: var(--ink-light);
}

.site-footer__inner {
  max-width: var(--max-wide);
  margin: 0 auto;
}

.site-footer a {
  color: var(--accent-blue);
}

.site-footer a:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}

.muted {
  color: var(--ink-light);
  font-size: 0.9375rem;
}

.divider {
  height: 1px;
  background: rgba(43, 43, 43, 0.08);
  margin: 2.5rem 0;
  border: 0;
}