:root {
  --co-ink: #111;
  --co-soft: #555;
  --co-line: #e6e6e6;
  --co-accent: #1b3a6b;
  --co-gray: #f6f7f9;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.co {
  margin: 0;
  background: #fff;
  color: var(--co-ink);
  font-family: Pretendard, "Noto Sans KR", "Malgun Gothic", sans-serif;
  font-size: 17px;
  line-height: 1.7;
  letter-spacing: -0.02em;
  word-break: keep-all;
}
body.co a { color: inherit; text-decoration: none; }
body.co :focus-visible { outline: 2px solid var(--co-accent); outline-offset: 2px; }
.skip { position: absolute; left: -999px; background: #fff; padding: .5rem .75rem; }
.skip:focus { left: 1rem; top: 1rem; z-index: 40; }
.co-in { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.co-hd { position: sticky; top: 0; z-index: 20; background: #fff; border-bottom: 1px solid var(--co-line); }
.co-hd .co-in { display: flex; align-items: center; gap: 40px; height: 80px; }
.co-logo { font-size: 24px; font-weight: 800; letter-spacing: -0.02em; }
.co-logo span { font-weight: 400; color: var(--co-soft); }
.co-nav { display: flex; gap: 32px; font-size: 17px; font-weight: 500; color: #333; }
.co-nav a:hover, .co-back:hover { color: var(--co-accent); }
.co-back { margin-left: auto; font-size: 15px; color: var(--co-soft); }

.co-hero {
  position: relative; display: flex; align-items: center; min-height: 640px; padding: 120px 0;
  background-color: #0f1d33; background-size: cover; background-position: center right; color: #fff;
}
.co-hero::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(10, 20, 38, .88) 0%, rgba(10, 20, 38, .6) 45%, rgba(10, 20, 38, .1) 100%);
}
.co-hero .co-in { position: relative; width: 100%; }
.co-eyebrow { margin: 0 0 18px; color: #9cc0ff; font-size: 16px; font-weight: 700; letter-spacing: .08em; }
.co-hero h1 { margin: 0 0 24px; font-size: 60px; font-weight: 700; line-height: 1.28; letter-spacing: -0.045em; }
.co-lead { max-width: 560px; margin: 0 0 40px; color: rgba(255, 255, 255, .82); font-size: 20px; }
.co-hero .co-btn { background: #fff; color: var(--co-ink) !important; }
.co-hero .co-btn:hover { background: #dce8ff; }
.co-btn {
  display: inline-flex; align-items: center; padding: 14px 32px;
  background: var(--co-ink); color: #fff !important; font-size: 17px; font-weight: 600;
}
.co-btn:hover { background: var(--co-accent); }

.co-sec { padding: 112px 0; }
.co-sec[id] { scroll-margin-top: 80px; }
.co-gray { background: var(--co-gray); }
.co-label { margin: 0 0 14px; color: var(--co-accent); font-size: 16px; font-weight: 700; }
.co-sec h2 { margin: 0; font-size: 40px; font-weight: 700; line-height: 1.35; letter-spacing: -0.04em; }
.co-split { display: grid; grid-template-columns: 1.1fr 1fr; gap: 72px; align-items: center; }
.co-photo { margin: 0; overflow: hidden; border-radius: 20px; box-shadow: 0 24px 60px rgba(15, 29, 51, .14); }
.co-photo img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.co-copy h2 { margin-bottom: 28px !important; }
.co-copy p { margin: 0 0 20px; color: #333; font-size: 19px; line-height: 1.85; }
.co-copy .co-label { color: var(--co-accent); font-size: 16px; margin-bottom: 14px; }

.co-band { padding: 72px 0; background: var(--co-accent); color: #fff; }
.co-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.co-stats div { padding-left: 24px; border-left: 1px solid rgba(255, 255, 255, .3); }
.co-stats strong { display: block; margin-bottom: 6px; font-size: 44px; font-weight: 800; letter-spacing: -0.03em; }
.co-stats span { color: rgba(255, 255, 255, .8); font-size: 17px; }

.co-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 48px; }
.co-cards article {
  overflow: hidden; background: #fff; border-radius: 18px;
  box-shadow: 0 10px 30px rgba(15, 29, 51, .06); transition: transform .25s ease, box-shadow .25s ease;
}
.co-cards article:hover { transform: translateY(-6px); box-shadow: 0 20px 44px rgba(15, 29, 51, .12); }
.co-cards img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.co-card-body { padding: 28px 30px 34px; }
.co-num { display: block; margin-bottom: 18px; color: var(--co-accent); font-size: 15px; font-weight: 700; }
.co-cards h3 { margin: 0 0 12px; font-size: 23px; font-weight: 700; }
.co-cards p { margin: 0; color: var(--co-soft); font-size: 17px; }

.co-list { margin: 48px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--co-ink); }
.co-list li { display: grid; grid-template-columns: 200px 1fr; gap: 24px; padding: 28px 0; border-bottom: 1px solid var(--co-line); }
.co-list strong { font-size: 22px; }
.co-list span { color: var(--co-soft); font-size: 18px; }

.co-cta { padding: 104px 0; background: linear-gradient(120deg, #0f1d33 0%, #1b3a6b 100%); color: #fff; text-align: center; }
.co-cta h2 { margin: 0 0 36px; font-size: 40px; font-weight: 700; line-height: 1.35; letter-spacing: -0.04em; }
.co-btn-light { background: #fff; color: var(--co-ink) !important; }
.co-btn-light:hover { background: #dce8ff; }

.co-ft { padding: 36px 0 56px; border-top: 1px solid var(--co-line); color: #777; font-size: 15px; }
.co-ft .co-in { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.co-ft-nav { display: flex; gap: 24px; }
.co-ft-nav a { color: #333; font-weight: 600; }
.co-ft p { margin: 0; font-weight: 700; color: #333; }

@media (max-width: 860px) {
  .co-nav { display: none; }
  .co-hero { min-height: 520px; padding: 80px 0; background-position: 70% center; }
  .co-hero::before { background: rgba(10, 20, 38, .72); }
  .co-hero h1 { font-size: 40px; }
  .co-sec { padding: 80px 0; }
  .co-sec h2, .co-cta h2 { font-size: 32px; }
  .co-split, .co-cards, .co-stats { grid-template-columns: 1fr; gap: 32px; }
  .co-band { padding: 56px 0; }
  .co-list li { grid-template-columns: 1fr; gap: 6px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .co-cards article { transition: none; }
  .co-cards article:hover { transform: none; }
}