:root {
  --paper: #fffdf8;
  --ink: #111111;
  --muted: rgba(17, 17, 17, 0.7);
  --line: rgba(17, 17, 17, 0.12);
  --blue: #1f8fff;
  --shadow: 0 24px 50px rgba(26, 20, 12, 0.1);
}

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

body {
  margin: 0;
  background:
    radial-gradient(circle at top, rgba(31, 143, 255, 0.12), transparent 30%),
    linear-gradient(180deg, #fffdf9 0%, #f6f2ea 100%);
  color: var(--ink);
  font-family: "Noto Sans KR", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.intro-shell {
  width: min(calc(100% - 32px), 1180px);
  margin: 0 auto;
  padding: 28px 0 54px;
}

.intro-hero {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 26px;
  align-items: stretch;
}

.intro-copy,
.intro-card,
.intro-note {
  border: 1px solid var(--line);
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

.intro-copy {
  padding: 30px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.intro-eyebrow,
.note-label,
.card-index {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.intro-copy h1 {
  margin: 12px 0 16px;
  font-family: "Archivo", sans-serif;
  font-size: clamp(3rem, 8vw, 5.8rem);
  line-height: 0.9;
  letter-spacing: -0.08em;
}

.intro-lead,
.intro-card p,
.note-body {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.8;
}

.intro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.primary-cta,
.secondary-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease;
}

.primary-cta {
  background: var(--ink);
  color: #ffffff;
}

.secondary-cta {
  border: 1px solid var(--line);
  background: #ffffff;
}

.primary-cta:hover,
.secondary-cta:hover {
  transform: translateY(-2px);
}

.intro-visual {
  position: relative;
  overflow: hidden;
  min-height: 660px;
  border-radius: 34px;
}

.intro-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.intro-stamp {
  position: absolute;
  left: 28px;
  top: 28px;
  font-family: "Archivo", sans-serif;
  font-size: clamp(2.4rem, 5vw, 4.8rem);
  line-height: 0.86;
  letter-spacing: -0.08em;
  color: rgba(247, 236, 213, 0.92);
  font-weight: 900;
  mix-blend-mode: screen;
}

.intro-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.intro-card {
  padding: 24px 22px;
}

.intro-card h2 {
  margin: 12px 0 10px;
  font-family: "Archivo", sans-serif;
  font-size: 1.6rem;
  line-height: 1;
  letter-spacing: -0.04em;
}

.intro-note {
  margin-top: 18px;
  padding: 24px 22px;
}

@media (max-width: 980px) {
  .intro-hero,
  .intro-grid {
    grid-template-columns: 1fr;
  }

  .intro-visual {
    min-height: 380px;
  }
}

@media (max-width: 640px) {
  .intro-shell {
    width: min(calc(100% - 20px), 1180px);
    padding-top: 20px;
  }

  .intro-copy,
  .intro-card,
  .intro-note {
    border-radius: 24px;
  }

  .intro-copy {
    padding: 24px 20px;
  }

  .intro-actions {
    display: grid;
  }
}