:root {
  --primary: #0ea5e9;
  --primary-deep: #0369a1;
  --text: #0f172a;
  --muted: #475569;
  --panel-bg: rgba(255, 255, 255, 0.96);
  --tip-bg: rgba(5, 24, 54, 0.92);
}

.tech-section {
  width: 100%;
  min-height: 860px;
  display: flex;
  overflow: hidden;
  background-image:
    linear-gradient(90deg, rgba(8, 15, 32, 0.56), rgba(7, 18, 42, 0.2)),
    url("/skin/images/technical-background.jpg");
  background-size: cover;
  background-position: center;
  box-shadow: 0 30px 90px rgba(15, 23, 42, 0.16);
}

.panel-left {
  width: 50%;
  background: var(--panel-bg);
  padding: 54px 60px 50px;
  position: relative;
  z-index: 5;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.panel-right {
  width: 50%;
  position: relative;
  overflow: hidden;
  min-width: 0;
}

.title-wrap {
  position: relative;
  margin-bottom: 18px;
  height: 98px;
}

.title-wrap h2 {
  position: absolute;
  left: 0;
  bottom: 10px;
  margin: 0;
  font-size: clamp(40px, 3.7vw, 60px);
  line-height: 1;
  font-weight: 700;
}

.title-wrap span {
  display: block;
  font-size: clamp(72px, 6.2vw, 112px);
  line-height: 1;
  color: rgba(148, 163, 184, 0.15);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 1px;
}

.divider {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
}

.divider::before,
.divider::after {
  content: "";
  height: 5px;
  border-radius: 999px;
  display: block;
}

.divider::before {
  width: 38px;
  background: var(--primary);
}

.divider::after {
  width: 22px;
  background: #f59e0b;
}

.desc {
  margin: 0;
  max-width: 640px;
  font-size: 17px;
  line-height: 1.8;
  color: #1f2937;
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 34px;
}

.card {
  min-height: 172px;
  border: 2px solid rgba(14, 165, 233, 0.86);
  border-radius: 18px;
  padding: 20px 14px 16px;
  background: rgba(255, 255, 255, 0.92);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: center;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px rgba(14, 165, 233, 0.14);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary);
  padding: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 24px rgba(14, 165, 233, 0.18);
}

.card-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  font-weight: 500;
  color: #111827;
}

.bottom-copy {
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid rgba(14, 165, 233, 0.14);
}

.bottom-copy h3 {
  margin: 0 0 12px;
  font-size: 24px;
  line-height: 1.45;
}

.bottom-copy p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.panel-right::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.08), transparent 52%),
    linear-gradient(180deg, rgba(8, 15, 32, 0.12), rgba(8, 15, 32, 0.28));
  z-index: 1;
  pointer-events: none;
}

.orbit-stage {
  width: 100%;
  min-height: 860px;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.product-center {
  position: absolute;
  left: 50%;
  top: 56%;
  width: min(620px, 74%);
  transform: translate(-50%, -50%);
  z-index: 10;
  pointer-events: none;
  filter: drop-shadow(0 38px 72px rgba(15, 23, 42, 0.38));
}

.product-center img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
}

.orbit-svg {
  position: absolute;
  z-index: 2;
  overflow: visible;
  pointer-events: none;
}

.orbit-path {
  fill: none;
  stroke: rgba(74, 222, 255, 0.48);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-dasharray: 10 14;
  filter: drop-shadow(0 0 8px rgba(45, 212, 191, 0.35));
}

.particle {
  fill: #38bdf8;
  opacity: 0.9;
}

.tech-node {
  position: absolute;
  width: 86px;
  height: 86px;
  transform: translate(-50%, -50%);
  z-index: 8;
  cursor: pointer;
}

.tech-node.node-back {
  z-index: 4;
  opacity: 0.76;
}

.tech-node.node-front {
  z-index: 12;
}

.tech-node.under-product {
  z-index: 8;
}

.tech-node.over-product {
  z-index: 13;
}

.node-bubble {
  width: 86px;
  height: 86px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 30% 28%, rgba(125, 211, 252, 0.97), rgba(14, 165, 233, 0.995) 44%, rgba(3, 105, 161, 1) 100%);
  border: 1px solid rgba(186, 230, 253, 0.82);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.22),
    0 0 0 10px rgba(14, 165, 233, 0.16),
    0 14px 32px rgba(6, 78, 124, 0.34);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.tech-node.node-back .node-bubble {
  transform: scale(0.94);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.16),
    0 0 0 8px rgba(14, 165, 233, 0.12),
    0 10px 24px rgba(6, 78, 124, 0.26);
}

.tech-node.node-front .node-bubble {
  transform: scale(1.06);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.24),
    0 0 0 12px rgba(14, 165, 233, 0.18),
    0 18px 36px rgba(6, 78, 124, 0.4);
}

.tech-node.under-product .node-bubble {
  opacity: 0.9;
  filter: saturate(0.98) brightness(1);
}

.tech-node.over-product .node-bubble {
  opacity: 1;
  filter: saturate(1.06) brightness(1.02);
}

.node-icon {
  width: 42px;
  height: 42px;
  display: block;
  object-fit: contain;
  filter: drop-shadow(0 1px 2px rgba(255, 255, 255, 0.18));
  transition: transform 0.25s ease;
}

.tech-node:hover .node-bubble {
  transform: scale(1.12);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.3),
    0 0 0 12px rgba(14, 165, 233, 0.22),
    0 0 32px rgba(14, 165, 233, 0.5);
}

.tech-node:hover .node-icon {
  transform: scale(1.08);
}

.node-text-box {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 14px);
  transform: translateX(-50%);
  width: 220px;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--tip-bg);
  border: 1px solid rgba(125, 211, 252, 0.4);
  color: #fff;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  backdrop-filter: blur(8px);
  box-shadow: 0 18px 40px rgba(2, 8, 23, 0.32);
  pointer-events: none;
  z-index: 20;
}

.node-text-box.tooltip-bottom {
  bottom: auto;
  top: calc(100% + 14px);
}

.node-text-box p {
  margin: 0;
  font-size: 15px;
  line-height: 1.5;
  text-align: left;
}

.node-text-box p:first-child {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

.tech-node:hover .node-text-box {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(-2px);
}

@media (max-width: 1400px) {
  .tech-section {
    min-height: 780px;
  }

  .panel-left {
    padding: 44px 40px 40px;
  }

  .title-wrap {
    height: 90px;
  }

  .desc {
    max-width: 580px;
    font-size: 16px;
  }

  .cards {
    gap: 12px;
  }

  .card {
    min-height: 156px;
    padding: 18px 12px 14px;
  }

  .card p {
    font-size: 14px;
  }

  .bottom-copy h3 {
    font-size: 22px;
  }

  .panel-right .orbit-stage {
    min-height: 780px;
  }

  .product-center {
    width: min(520px, 68%);
  }
}

@media (max-width: 980px) {
  .tech-section {
    flex-direction: column;
    min-height: auto;
  }

  .panel-left,
  .panel-right {
    width: 100%;
  }

  .panel-left {
    padding: 36px 24px 30px;
  }

  .cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .orbit-stage {
    min-height: 620px;
  }

  .product-center {
    width: min(420px, 70%);
    top: 55%;
  }

  .title-wrap {
    height: 82px;
  }

  .title-wrap h2 {
    font-size: clamp(34px, 7vw, 48px);
  }

  .title-wrap span {
    font-size: clamp(58px, 11vw, 86px);
  }

  .desc {
    max-width: none;
    font-size: 16px;
    line-height: 1.75;
  }

  .card {
    min-height: 144px;
  }

  .bottom-copy {
    margin-top: 24px;
    padding-top: 18px;
  }

  .bottom-copy h3 {
    font-size: 21px;
  }

  .tech-node,
  .node-bubble {
    width: 78px;
    height: 78px;
  }

  .node-icon {
    width: 38px;
    height: 38px;
  }

  .node-text-box {
    width: 200px;
    padding: 10px 12px;
  }

  .node-text-box p {
    font-size: 14px;
  }

  .node-text-box p:first-child {
    font-size: 15px;
  }
}

@media (max-width: 640px) {
  .tech-section {
    border-radius: 18px;
  }

  .panel-left {
    padding: 28px 16px 24px;
  }

  .title-wrap {
    height: 72px;
    margin-bottom: 14px;
  }

  .title-wrap h2 {
    bottom: 6px;
    font-size: 34px;
  }

  .title-wrap span {
    font-size: 56px;
  }

  .divider {
    margin-bottom: 14px;
  }

  .desc {
    font-size: 15px;
    line-height: 1.7;
  }

  .cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 24px;
  }

  .card {
    min-height: 126px;
    border-radius: 14px;
    padding: 14px 8px 12px;
    gap: 8px;
  }

  .card-icon {
    width: 46px;
    height: 46px;
    padding: 6px;
    border-radius: 12px;
  }

  .card p {
    font-size: 13px;
    line-height: 1.45;
  }

  .bottom-copy {
    margin-top: 18px;
    padding-top: 14px;
  }

  .bottom-copy h3 {
    font-size: 18px;
    line-height: 1.5;
  }

  .bottom-copy p {
    font-size: 14px;
    line-height: 1.7;
  }

  .orbit-stage {
    min-height: 480px;
  }

  .product-center {
    width: min(320px, 82%);
    top: 56%;
  }

  .tech-node,
  .node-bubble {
    width: 68px;
    height: 68px;
  }

  .node-icon {
    width: 32px;
    height: 32px;
  }

  .node-text-box {
    width: 168px;
    padding: 8px 10px;
  }

  .node-text-box p {
    font-size: 12px;
    line-height: 1.4;
  }

  .node-text-box p:first-child {
    font-size: 13px;
  }
}