:root {
  --depth-ink: #183d35;
  --depth-muted: #5e7067;
  --depth-line: rgba(24, 61, 53, .14);
  --depth-paper: #f7f4ec;
  --depth-gold: #a77a39;
}

.depth-page { background: #fbfaf6; color: var(--depth-ink); }
.depth-hero { padding: clamp(70px, 9vw, 122px) 0 76px; background: linear-gradient(135deg, #183d35, #285a4d); color: #f9f7f0; }
.depth-hero .wrap { max-width: 1180px; }
.depth-hero h1 { max-width: 780px; margin: 14px 0 22px; font: 700 clamp(42px, 6vw, 76px)/1.08 "Songti SC", "STSong", serif; letter-spacing: -.035em; }
.depth-hero .lead { max-width: 760px; color: rgba(249, 247, 240, .82); font-size: clamp(17px, 2vw, 21px); line-height: 1.85; }
.depth-hero .eyebrow { color: #e3c990; }
.depth-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.depth-actions a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 18px; border: 1px solid rgba(255,255,255,.28); border-radius: 999px; color: #fff; font-weight: 800; }
.depth-actions a:first-child { border-color: #e3c990; background: #e3c990; color: #183d35; }
.depth-section { padding: clamp(52px, 7vw, 92px) 0; }
.depth-section.muted { background: var(--depth-paper); }
.depth-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr); gap: clamp(24px, 5vw, 70px); align-items: start; }
.depth-section h2 { margin: 8px 0 18px; font: 700 clamp(30px, 4vw, 48px)/1.22 "Songti SC", "STSong", serif; letter-spacing: -.02em; }
.depth-section h3 { margin: 0 0 10px; color: var(--depth-ink); font: 700 22px/1.45 "Songti SC", "STSong", serif; }
.depth-section p, .depth-section li { color: var(--depth-muted); font-size: 16px; line-height: 1.85; }
.depth-section p { max-width: 760px; }
.depth-kicker { color: var(--depth-gold); font-size: 12px; font-weight: 900; letter-spacing: .16em; text-transform: uppercase; }
.depth-callout { padding: 24px; border: 1px solid var(--depth-line); border-radius: 18px; background: #fff; box-shadow: 0 16px 45px rgba(24,61,53,.06); }
.depth-callout strong { display: block; margin-bottom: 12px; font: 700 22px/1.4 "Songti SC", "STSong", serif; }
.depth-callout p { margin: 0; font-size: 15px; }
.depth-timeline { display: grid; gap: 0; margin-top: 28px; border-left: 1px solid var(--depth-line); }
.depth-timeline article { position: relative; padding: 0 0 30px 28px; }
.depth-timeline article::before { content: ""; position: absolute; left: -6px; top: 7px; width: 11px; height: 11px; border-radius: 50%; background: var(--depth-gold); box-shadow: 0 0 0 5px var(--depth-paper); }
.depth-timeline time { display: block; margin-bottom: 6px; color: var(--depth-gold); font-size: 13px; font-weight: 900; letter-spacing: .08em; }
.depth-timeline p { margin: 0; }
.depth-table { width: 100%; margin-top: 24px; border-collapse: collapse; border: 1px solid var(--depth-line); background: #fff; }
.depth-table th, .depth-table td { padding: 16px 18px; border-bottom: 1px solid var(--depth-line); text-align: left; vertical-align: top; line-height: 1.7; }
.depth-table th { width: 22%; color: var(--depth-ink); background: #edf1eb; font-weight: 900; }
.depth-table td { color: var(--depth-muted); }
.depth-table tr:last-child th, .depth-table tr:last-child td { border-bottom: 0; }
.depth-checklist { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 26px; padding: 0; list-style: none; }
.depth-checklist li { padding: 18px; border: 1px solid var(--depth-line); background: #fff; }
.depth-checklist b { display: block; margin-bottom: 7px; color: var(--depth-ink); }
.depth-footer-card { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px; padding: 28px; border-radius: 18px; background: var(--depth-ink); color: #fff; }
.depth-footer-card p { margin: 0; color: rgba(255,255,255,.75); }
.depth-footer-card a { display: inline-flex; min-height: 42px; align-items: center; padding: 0 17px; border-radius: 999px; background: #e3c990; color: var(--depth-ink); font-weight: 900; }

.case-filter-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 0; }
.case-filter-row button { min-height: 38px; padding: 0 13px; border: 1px solid var(--depth-line); border-radius: 999px; background: #fff; color: var(--depth-ink); font: inherit; font-size: 13px; font-weight: 800; cursor: pointer; }
.case-filter-row button.active { border-color: var(--depth-ink); background: var(--depth-ink); color: #fff; }
.case-card-grid [data-case-card][hidden] { display: none; }

@media (max-width: 760px) {
  .depth-hero { padding: 50px 0 48px; }
  .depth-hero h1 { font-size: 44px; }
  .depth-hero .lead { font-size: 16px; line-height: 1.75; }
  .depth-grid { grid-template-columns: 1fr; gap: 28px; }
  .depth-section { padding: 48px 0; }
  .depth-section h2 { font-size: 34px; }
  .depth-section p, .depth-section li { font-size: 15px; }
  .depth-table { display: block; overflow-x: auto; white-space: normal; }
  .depth-table th, .depth-table td { min-width: 150px; padding: 13px 12px; font-size: 14px; }
  .depth-checklist { grid-template-columns: 1fr; }
  .depth-footer-card { padding: 22px 18px; }
}