.channel-proof-section {
  --channel-accent: #0b7669;
  --channel-ink: #122b2a;
  --channel-muted: #526765;
  --channel-line: rgba(11, 118, 105, 0.2);
  --channel-card: #fff;
  box-sizing: border-box;
  padding: clamp(64px, 8vw, 96px) 0;
  border-block: 1px solid rgba(11, 118, 105, 0.12);
  color: var(--channel-ink);
  background:
    radial-gradient(circle at 88% 12%, rgba(35, 164, 147, 0.12), transparent 28%),
    linear-gradient(145deg, #f4faf8, #eaf5f2);
}

.channel-proof-section *,
.channel-proof-section *::before,
.channel-proof-section *::after {
  box-sizing: border-box;
}

.channel-proof-section--strong {
  --channel-accent: #8de5d5;
  --channel-ink: #fff;
  --channel-muted: rgba(255, 255, 255, 0.8);
  --channel-line: rgba(255, 255, 255, 0.18);
  --channel-card: rgba(255, 255, 255, 0.09);
  border-block: 0;
  background:
    radial-gradient(circle at 88% 8%, rgba(101, 218, 196, 0.2), transparent 28%),
    linear-gradient(135deg, #062f2b, #0a5d53 62%, #087164);
}

.channel-proof-section--corporate {
  --channel-accent: #2471a6;
  --channel-ink: #102b45;
  --channel-muted: #52697d;
  --channel-line: rgba(36, 113, 166, 0.2);
  background:
    radial-gradient(circle at 88% 12%, rgba(71, 151, 205, 0.13), transparent 28%),
    linear-gradient(145deg, #f5f9fc, #eaf3f8);
}

.channel-proof {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.channel-proof__head {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: clamp(24px, 5vw, 64px);
  align-items: end;
  margin-bottom: clamp(30px, 5vw, 48px);
}

.channel-proof__eyebrow {
  margin: 0 0 10px;
  color: var(--channel-accent);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.12em;
  line-height: 1.5;
  text-transform: uppercase;
}

.channel-proof__title {
  margin: 0;
  color: var(--channel-ink);
  overflow-wrap: anywhere;
  font-size: clamp(32px, 4.2vw, 48px);
  font-weight: 900;
  letter-spacing: -0.025em;
  line-height: 1.34;
}

.channel-proof-section:not(.channel-proof-section--strong) .channel-proof__title {
  font-size: clamp(30px, 3.7vw, 42px);
}

.channel-proof__lead {
  margin: 0;
  color: var(--channel-muted);
  font-size: clamp(16px, 1.7vw, 18px);
  font-weight: 600;
  line-height: 1.9;
}

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

.channel-proof__card {
  min-width: 0;
  min-height: 228px;
  padding: clamp(24px, 3vw, 32px);
  border: 1px solid var(--channel-line);
  border-radius: 18px;
  background: var(--channel-card);
  box-shadow: 0 16px 38px rgba(10, 53, 49, 0.08);
}

.channel-proof-section--strong .channel-proof__card {
  backdrop-filter: blur(8px);
  box-shadow: 0 18px 46px rgba(0, 20, 18, 0.22);
}

.channel-proof__mark {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  margin-bottom: 22px;
  border: 1px solid var(--channel-line);
  border-radius: 14px;
  color: var(--channel-accent);
  background: rgba(11, 118, 105, 0.08);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.channel-proof-section--strong .channel-proof__mark {
  background: rgba(255, 255, 255, 0.08);
}

.channel-proof__card h3 {
  margin: 0 0 11px;
  color: var(--channel-ink);
  overflow-wrap: anywhere;
  font-size: clamp(20px, 2.2vw, 24px);
  font-weight: 900;
  line-height: 1.45;
}

.channel-proof__card p {
  margin: 0;
  color: var(--channel-muted);
  font-size: 16px;
  line-height: 1.8;
}

.channel-proof__takeaway {
  display: flex;
  gap: 12px;
  align-items: center;
  margin: 22px 0 0;
  padding: 15px 18px;
  border: 1px solid var(--channel-line);
  border-radius: 12px;
  color: var(--channel-ink);
  background: rgba(255, 255, 255, 0.07);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.65;
}

.channel-proof__takeaway::before {
  flex: 0 0 auto;
  color: var(--channel-accent);
  content: "✓";
  font-size: 20px;
  font-weight: 900;
}

@media (max-width: 820px) {
  .channel-proof__head {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .channel-proof__grid {
    grid-template-columns: 1fr;
  }

  .channel-proof__card {
    min-height: 0;
  }
}

@media (max-width: 560px) {
  .channel-proof-section {
    padding: 56px 0;
  }

  .channel-proof {
    width: min(100% - 28px, 1120px);
  }

  .channel-proof__title {
    font-size: 29px;
  }

  .channel-proof-section:not(.channel-proof-section--strong) .channel-proof__title {
    font-size: 28px;
  }

  .channel-proof__card {
    padding: 23px;
    border-radius: 14px;
  }

  .channel-proof__card h3 {
    font-size: 21px;
  }

  .channel-proof__takeaway {
    align-items: flex-start;
    font-size: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .channel-proof-section--strong .channel-proof__card {
    backdrop-filter: none;
  }
}