.ch-section {
  position: relative;
  overflow: hidden;
  padding: 88px 0 100px;
  background: #091A24;
}

.ch-network {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: url("/img/photos/certs-waves.svg");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
}

.ch-glows {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.ch-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(64px);
  will-change: transform, opacity;
}

.ch-glow-cyan {
  background: radial-gradient(circle, rgba(6, 180, 193, 0.42) 0%, rgba(6, 180, 193, 0) 70%);
}

.ch-glow-purple {
  background: radial-gradient(circle, rgba(114, 62, 143, 0.4) 0%, rgba(114, 62, 143, 0) 70%);
}

.ch-glow-a {
  width: 640px;
  height: 640px;
  top: -160px;
  left: -4%;
  animation: ch-drift-a 18s ease-in-out infinite;
}

.ch-glow-b {
  width: 720px;
  height: 720px;
  top: -8%;
  right: -10%;
  animation: ch-drift-b 22s ease-in-out infinite;
}

.ch-glow-c {
  width: 540px;
  height: 540px;
  top: 38%;
  left: -12%;
  animation: ch-drift-c 16s ease-in-out infinite;
}

.ch-glow-d {
  width: 620px;
  height: 620px;
  bottom: -14%;
  right: -6%;
  animation: ch-drift-d 20s ease-in-out infinite;
}

.ch-glow-e {
  width: 480px;
  height: 480px;
  bottom: 6%;
  left: 18%;
  animation: ch-drift-e 14s ease-in-out infinite;
}

.ch-glow-f {
  width: 560px;
  height: 560px;
  top: 28%;
  right: 18%;
  animation: ch-drift-f 24s ease-in-out infinite;
}

@keyframes ch-drift-a {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.7; }
  50% { transform: translate(48px, 28px) scale(1.12); opacity: 1; }
}

@keyframes ch-drift-b {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.65; }
  50% { transform: translate(-56px, 36px) scale(1.18); opacity: 1; }
}

@keyframes ch-drift-c {
  0%, 100% { transform: translate(0, 0) scale(1.05); opacity: 0.6; }
  50% { transform: translate(36px, -44px) scale(0.92); opacity: 0.95; }
}

@keyframes ch-drift-d {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.7; }
  50% { transform: translate(-40px, -32px) scale(1.14); opacity: 1; }
}

@keyframes ch-drift-e {
  0%, 100% { transform: translate(0, 0) scale(0.95); opacity: 0.55; }
  50% { transform: translate(28px, 40px) scale(1.2); opacity: 0.9; }
}

@keyframes ch-drift-f {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.5; }
  50% { transform: translate(44px, -24px) scale(1.1); opacity: 0.85; }
}

@media (prefers-reduced-motion: reduce) {
  .ch-glow {
    animation: none;
  }
}

.ch-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 48px;
}

.ch-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 40px;
}

.ch-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  padding: 7px 14px 7px 10px;
  border-radius: 999px;
  background: rgba(6, 180, 193, 0.14);
  border: 1px solid rgba(166, 226, 231, 0.22);
  color: #A6E2E7;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.ch-header h2 {
  margin: 0;
  font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.03em;
  color: #f4fbfd;
}

.ch-header h2 .ch-brand {
  background: linear-gradient(90deg, #A6E2E7 0%, #06B4C1 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.ch-heading-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 16px 0 14px;
}

.ch-heading-mark::before {
  content: "";
  width: 44px;
  height: 2px;
  border-radius: 2px;
  background: #06B4C1;
}

.ch-heading-mark::after {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 80, 35, 0.16);
}

.ch-header p {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  color: #9db4bf;
}

.ch-map {
  position: relative;
  max-width: 920px;
  margin: 0 auto;
  padding: 36px 40px 40px;
  background: rgba(12, 38, 52, 0.55);
  border: 1px solid rgba(6, 180, 193, 0.18);
  border-radius: 28px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.28), 0 0 40px rgba(6, 180, 193, 0.08);
  backdrop-filter: blur(8px);
}

.ch-level {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 28px 24px 30px;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(15, 42, 54, 0.94) 0%, rgba(9, 26, 36, 0.9) 100%);
  border: 1px solid rgba(6, 180, 193, 0.32);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28), 0 0 28px rgba(6, 180, 193, 0.14);
}

.ch-level-start {
  border-color: rgba(6, 180, 193, 0.58);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.32), 0 0 40px rgba(6, 180, 193, 0.3);
}

.ch-level-head {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
  max-width: 520px;
}

.ch-level-num {
  width: 52px;
  height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, #06B4C1 0%, #0583A7 100%);
  color: #ffffff;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.04em;
  box-shadow: 0 0 0 7px rgba(6, 180, 193, 0.18), 0 8px 22px rgba(6, 180, 193, 0.4);
}

.ch-level-kicker {
  display: inline-block;
  margin-bottom: 4px;
  color: #6ED4DC;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.ch-level-copy h3 {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #f4fbfd;
}

.ch-level-copy p {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: #9db4bf;
}

.ch-level-nodes {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
  gap: 12px;
}

.ch-node-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.ch-node {
  width: 118px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  text-decoration: none;
  background: #0f2a36;
  border: 1px solid rgba(166, 226, 231, 0.16);
  border-radius: 10px;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.22);
  color: inherit;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

a.ch-node:hover {
  color: inherit;
  text-decoration: none;
  transform: translateY(-2px);
  border-color: rgba(6, 180, 193, 0.55);
  box-shadow: 0 12px 24px rgba(6, 180, 193, 0.22);
}

.ch-node-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 8px 8px 6px;
  background: #ffffff;
}

.ch-node-logo img {
  width: 72px;
  height: auto;
  display: block;
}

.ch-node-code {
  display: block;
  padding: 8px 6px;
  background: #16384a;
  color: #ffffff;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-align: center;
  line-height: 1.2;
}

.ch-node-start {
  width: 132px;
  border-color: rgba(6, 180, 193, 0.55);
  box-shadow: 0 0 0 3px rgba(6, 180, 193, 0.22), 0 10px 28px rgba(6, 180, 193, 0.32);
}

.ch-node-start .ch-node-code {
  background: linear-gradient(135deg, #06B4C1 0%, #0583A7 100%);
}

.ch-start-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(6, 180, 193, 0.16);
  color: #A6E2E7;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ch-connector {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 64px;
}

.ch-connector::before {
  content: "";
  width: 3px;
  height: 26px;
  background: linear-gradient(180deg, rgba(6, 180, 193, 0.2) 0%, #06B4C1 100%);
  box-shadow: 0 0 12px rgba(6, 180, 193, 0.7);
}

.ch-arrow {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(6, 180, 193, 0.16);
  border: 1px solid rgba(6, 180, 193, 0.45);
  color: #6ED4DC;
  box-shadow: 0 0 16px rgba(6, 180, 193, 0.35);
}

.ch-arrow i {
  font-size: 13px;
  line-height: 1;
}

@media (max-width: 991px) {
  .ch-section {
    padding: 64px 0 72px;
  }

  .ch-container {
    padding: 0 20px;
  }

  .ch-map {
    padding: 22px 14px 24px;
    border-radius: 22px;
  }

  .ch-level {
    padding: 18px 12px 20px;
    gap: 14px;
  }

  .ch-level-copy h3 {
    font-size: 18px;
  }
}

@media (max-width: 575px) {
  .ch-container {
    padding: 0 16px;
  }

  .ch-level-num {
    width: 40px;
    height: 40px;
    font-size: 13px;
  }

  .ch-node,
  .ch-node-start {
    width: 100px;
  }

  .ch-node-code {
    font-size: 10px;
  }

  .ch-level-nodes {
    gap: 8px;
  }
}