/* 案例详情页共用样式 */
.case-page .site-header { position: sticky; }
.case-hero { padding: 74px 0 54px; border-bottom: 1px solid var(--line); background: var(--paper); position: relative; overflow: hidden; }
.case-hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(700px 300px at 80% 20%, rgba(36,87,255,.08), transparent 70%);
}
.case-hero-inner { position: relative; display: grid; grid-template-columns: 1.15fr .85fr; gap: 60px; align-items: end; }
.case-hero h1 { font-family: var(--serif); font-size: clamp(48px, 6.8vw, 92px); line-height: 1.08; letter-spacing: -.05em; margin: 18px 0 18px; }
.case-hero .case-lead { color: var(--ink-soft); font-size: 17px; line-height: 1.85; max-width: 640px; }
.case-hero-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.case-hero-meta span { border: 1px solid var(--line); background: rgba(255,255,255,.4); border-radius: 999px; padding: 5px 12px; font-size: 11px; color: var(--ink-soft); }
.case-hero-side { border-left: 1px solid var(--line); padding-left: 28px; display: grid; gap: 16px; }
.case-hero-side div span { display: block; color: var(--muted); font-size: 10px; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 3px; }
.case-hero-side div strong { font-size: 13px; font-weight: 600; line-height: 1.6; }
.case-main { padding: 58px 0 100px; }
.case-layout { display: grid; grid-template-columns: 1.45fr .55fr; gap: 46px; align-items: start; }
.case-gallery { display: grid; gap: 18px; }
.case-visual { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #e7e2d6; min-height: 320px; }
.case-visual img { width: 100%; height: 100%; max-height: 620px; object-fit: cover; object-position: top; }
.case-visual.is-phone { display: grid; place-items: center; padding: 28px 18px; background: #dfe5dc; }
.case-visual.is-phone img { width: auto; max-height: 560px; border: 7px solid #1d1d1b; border-radius: 26px; box-shadow: 0 22px 45px rgba(20,20,18,.18); object-fit: cover; object-position: top; }
.case-visual .mockup { min-height: 400px; border: 0; border-radius: 0; }
.case-visual .mock-label { font-size: 11px; }
.case-thumbs { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.case-thumbs .case-visual { min-height: 220px; }
.case-thumbs .case-visual img { max-height: 330px; }
.case-side { position: sticky; top: 92px; display: grid; gap: 18px; }
.case-side-card { border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--white); padding: 24px; }
.case-side-card h3 { font-family: var(--serif); font-size: 22px; letter-spacing: -.03em; margin-bottom: 14px; }
.case-side-card dl { display: grid; gap: 12px; margin: 0; }
.case-side-card dt { color: var(--muted); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; }
.case-side-card dd { margin: 3px 0 0; font-size: 13px; line-height: 1.7; }
.case-side-card p { color: var(--muted); font-size: 13px; line-height: 1.8; }
.case-side-card .btn { width: 100%; margin-top: 14px; }
.case-section { border-top: 1px solid var(--line); padding: 42px 0; }
.case-section h2 { font-family: var(--serif); font-size: clamp(28px, 3vw, 40px); letter-spacing: -.04em; margin-bottom: 18px; }
.case-section p { color: var(--ink-soft); font-size: 15px; line-height: 1.9; max-width: 760px; }
.case-list { display: grid; gap: 10px; margin-top: 18px; }
.case-list li { display: flex; gap: 10px; color: var(--ink-soft); font-size: 14px; line-height: 1.8; }
.case-list li::before { content: "↳"; color: var(--accent); flex: none; }
.case-quote { border-left: 3px solid var(--accent); padding: 4px 0 4px 20px; margin: 24px 0 0; color: var(--muted); font-family: var(--serif); font-size: 18px; line-height: 1.8; }
.case-index-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.case-index-item { display: flex; flex-direction: column; gap: 8px; text-decoration: none; border: 1px solid var(--line); background: var(--white); border-radius: var(--radius-sm); padding: 24px; transition: transform .2s, box-shadow .2s; }
.case-index-item:hover { transform: translateY(-3px); box-shadow: 0 18px 40px rgba(20,20,18,.08); }
.case-index-item span { color: var(--muted); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; }
.case-index-item strong { font-family: var(--serif); font-size: 26px; letter-spacing: -.03em; }
.case-index-item em { color: var(--accent); font-style: normal; font-size: 12px; font-weight: 600; }
.case-back { display: inline-flex; align-items: center; gap: 7px; color: var(--muted); text-decoration: none; font-size: 12px; margin-bottom: 20px; }
.case-back:hover { color: var(--accent); }
.case-nav { display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid var(--line); padding-top: 24px; margin-top: 34px; font-size: 12px; }
.case-nav a { text-decoration: none; color: var(--muted); }
.case-nav a:hover { color: var(--accent); }

@media (max-width: 900px) {
  .case-hero-inner { grid-template-columns: 1fr; gap: 28px; }
  .case-hero-side { border-left: 0; padding-left: 0; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); padding-top: 20px; }
  .case-layout { grid-template-columns: 1fr; }
  .case-side { position: static; grid-row: 1; }
  .case-side-card { padding: 20px; }
  .case-hero { padding-top: 46px; }
}
@media (max-width: 600px) {
  .case-index-grid { grid-template-columns: 1fr; }
  .case-hero h1 { font-size: 44px; }
  .case-hero-side { grid-template-columns: 1fr; }
  .case-thumbs { grid-template-columns: 1fr; }
  .case-visual { min-height: 240px; }
  .case-visual .mockup { min-height: 300px; }
  .case-main { padding-top: 36px; }
  .case-section { padding: 30px 0; }
  .case-nav { flex-direction: column; }
}