.challenge-hero { position: relative; overflow: hidden; padding-block: 86px 76px; background: var(--surface); }
.challenge-grid { position: absolute; inset: 0; opacity: 0.35; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 54px 54px; mask-image: linear-gradient(to right, transparent 15%, black); }
.challenge-hero-inner { position: relative; display: grid; grid-template-columns: 0.9fr 1.1fr; align-items: center; gap: 78px; }
.challenge-breadcrumb { display: flex; gap: 8px; margin-bottom: 26px; color: var(--blue); font-size: 0.78rem; font-weight: 700; }
.challenge-hero h1 { max-width: 720px; margin: 0; font-size: clamp(2.45rem, 4.4vw, 4.15rem); line-height: 1.07; }
.challenge-lead { max-width: 650px; margin: 25px 0 0; color: var(--muted); font-size: 1.12rem; }
.challenge-actions { display: flex; align-items: center; gap: 24px; margin-top: 32px; }
.challenge-visual { position: relative; min-height: 390px; padding: 52px 36px 72px; overflow: hidden; border: 1px solid #ccdae1; border-radius: 8px; background: rgba(255, 255, 255, 0.96); box-shadow: 0 30px 70px rgba(16, 35, 51, 0.16); }
.challenge-status { position: absolute; top: 0; right: 0; left: 0; height: 47px; display: flex; align-items: center; gap: 8px; padding: 0 18px; border-bottom: 1px solid var(--line); color: #287257; font-size: 0.66rem; font-weight: 700; }
.challenge-status i { width: 7px; height: 7px; border-radius: 50%; background: #24b47e; box-shadow: 0 0 0 5px rgba(36,180,126,.12); animation: challenge-pulse 2s ease-out infinite; }
.challenge-core, .challenge-result { position: absolute; top: 96px; display: flex; align-items: center; justify-content: center; flex-direction: column; width: 150px; height: 150px; border-radius: 50%; text-align: center; }
.challenge-core { left: 34px; color: var(--white); background: var(--ink); box-shadow: 0 0 0 12px rgba(16,35,51,.06); }
.challenge-core svg { width: 50px; height: 50px; margin-bottom: 10px; fill: none; stroke: var(--cyan); stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.challenge-core span { font-size: 0.68rem; font-weight: 700; }
.challenge-result { right: 34px; border: 1px solid #aee7f5; color: var(--blue); background: #eaf9fc; box-shadow: 0 0 0 12px rgba(34,188,237,.06); animation: result-float 4s ease-in-out infinite; }
.challenge-result small { color: var(--muted); font-size: 0.57rem; }
.challenge-result strong { max-width: 120px; margin-top: 4px; font-family: "Manrope", sans-serif; font-size: 0.8rem; line-height: 1.25; }
.challenge-connector { position: absolute; top: 167px; right: 184px; left: 184px; height: 8px; border-top: 2px dashed #9dddec; }
.challenge-connector i { position: absolute; top: -6px; width: 10px; height: 10px; border-radius: 50%; background: var(--cyan-dark); animation: connector-travel 3s linear infinite; }
.challenge-connector i:nth-child(2) { animation-delay: -1s; }.challenge-connector i:nth-child(3) { animation-delay: -2s; }
.challenge-chips { position: absolute; right: 28px; bottom: 24px; left: 28px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.challenge-chips span { display: flex; align-items: center; gap: 6px; min-width: 0; padding: 9px; overflow: hidden; border: 1px solid var(--line); border-radius: 4px; color: var(--muted); background: #fbfdfe; font-size: 0.55rem; white-space: nowrap; text-overflow: ellipsis; }
.challenge-chips i { display: grid; flex: 0 0 auto; place-items: center; width: 17px; height: 17px; border-radius: 50%; color: #287257; background: #e5f7ef; font-size: 0.55rem; font-style: normal; }
@keyframes challenge-pulse { 50% { box-shadow: 0 0 0 8px transparent; } }
@keyframes result-float { 50% { transform: translateY(-6px); } }
@keyframes connector-travel { from { left: 0; } to { left: calc(100% - 10px); } }

.challenge-section { padding-block: 100px; }
.challenge-heading { display: grid; grid-template-columns: 1.1fr 0.9fr; align-items: end; gap: 75px; margin-bottom: 50px; }
.challenge-heading h2, .challenge-route h2, .challenge-cta h2 { margin: 0; font-size: clamp(2rem, 3.8vw, 3.2rem); line-height: 1.15; }
.challenge-heading > p { margin: 0; color: var(--muted); }
.signal-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.signal-card { position: relative; min-height: 205px; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: background 220ms ease, box-shadow 220ms ease, transform 220ms ease; }
.signal-card::after { content: ""; position: absolute; right: 0; bottom: 0; left: 0; height: 3px; background: linear-gradient(90deg,var(--blue),var(--cyan)); transform: scaleX(0); transform-origin: left; transition: transform 280ms ease; }
.signal-card:hover { z-index: 1; background: #f8fcfd; box-shadow: 0 16px 34px rgba(16,35,51,.09); transform: translateY(-4px); }
.signal-card:hover::after { transform: scaleX(1); }
.signal-card > span { color: var(--cyan-dark); font-size: 0.72rem; font-weight: 800; }
.signal-card h3 { margin: 30px 0 9px; font-size: 1.05rem; }
.signal-card p { margin: 0; color: var(--muted); font-size: 0.9rem; }
.signal-grid .reveal:nth-child(2), .challenge-route ol .reveal:nth-child(2) { transition-delay: 80ms; }
.signal-grid .reveal:nth-child(3), .challenge-route ol .reveal:nth-child(3) { transition-delay: 160ms; }
.signal-grid .reveal:nth-child(4), .challenge-route ol .reveal:nth-child(4) { transition-delay: 240ms; }

.challenge-section-dark { color: var(--white); background: var(--ink); }
.challenge-route { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 100px; }
.challenge-route .eyebrow { color: var(--cyan); }
.challenge-route > div > p:last-child { color: #adc0ca; }
.challenge-route ol { margin: 0; padding: 0; list-style: none; border-top: 1px solid #34505e; }
.challenge-route li { display: grid; grid-template-columns: 56px 1fr; gap: 18px; padding: 24px 0; border-bottom: 1px solid #34505e; }
.challenge-route li > span { color: var(--cyan); font-size: 0.75rem; font-weight: 800; }
.challenge-route h3 { margin: 0 0 4px; font-size: 1.05rem; }
.challenge-route li p { margin: 0; color: #adc0ca; font-size: 0.88rem; }
.challenge-cta { padding-block: 78px; background: var(--surface); }
.challenge-cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 60px; }
.challenge-cta .eyebrow { margin-bottom: 12px; }

@media (max-width: 900px) {
  .challenge-hero-inner, .challenge-route { grid-template-columns: 1fr; gap: 54px; }
  .challenge-visual { width: min(620px, 100%); }
}
@media (max-width: 600px) {
  .challenge-hero { padding-block: 62px 58px; }
  .challenge-hero h1 { font-size: 2.35rem; }
  .challenge-actions { align-items: flex-start; flex-direction: column; }
  .challenge-visual { min-height: 430px; padding-inline: 16px; }
  .challenge-core, .challenge-result { top: 80px; width: 124px; height: 124px; }
  .challenge-core { left: 18px; }.challenge-result { right: 18px; }
  .challenge-connector { top: 141px; right: 142px; left: 142px; }
  .challenge-chips { grid-template-columns: 1fr; }
  .challenge-heading, .signal-grid { grid-template-columns: 1fr; }
  .challenge-heading { gap: 22px; }
  .challenge-cta-inner { align-items: flex-start; flex-direction: column; }
}