:root {
  --ink: #172126;
  --muted: #5a6a72;
  --soft: #eef8fb;
  --paper: #f8fcfd;
  --cloud: rgba(255, 255, 255, 0.72);
  --line: rgba(23, 33, 38, 0.1);
  --cyan: #10c8c2;
  --cyan-strong: #00a89e;
  --blue: #8bc7ff;
  --violet: #9ca6ff;
  --shadow: 0 24px 80px rgba(44, 88, 103, 0.16);
  --radius: 8px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 18% 8%, rgba(139, 199, 255, 0.35), transparent 30rem),
    radial-gradient(circle at 76% 12%, rgba(49, 243, 223, 0.18), transparent 28rem),
    linear-gradient(180deg, #f9fdff 0%, #eef8fb 48%, #f9fbfa 100%);
  line-height: 1.6;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(23, 33, 38, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 33, 38, 0.03) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.55), transparent 72%);
  z-index: -3;
}

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

.cloud-field {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: -2;
}

.cloud {
  position: absolute;
  display: block;
  width: 48vw;
  height: 24vw;
  min-width: 520px;
  min-height: 260px;
  border-radius: 999px;
  background:
    radial-gradient(circle at 28% 48%, rgba(255, 255, 255, 0.95), transparent 34%),
    radial-gradient(circle at 55% 34%, rgba(255, 255, 255, 0.78), transparent 35%),
    radial-gradient(circle at 72% 58%, rgba(222, 245, 250, 0.72), transparent 36%);
  filter: blur(24px);
  opacity: 0.72;
  animation: cloud-drift 28s ease-in-out infinite alternate;
}

.cloud-a {
  top: 8vh;
  left: -12vw;
}

.cloud-b {
  top: 36vh;
  right: -18vw;
  animation-duration: 34s;
}

.cloud-c {
  bottom: -10vh;
  left: 18vw;
  animation-duration: 40s;
  opacity: 0.54;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 18px 0;
  backdrop-filter: blur(14px);
}

.brand {
  font-weight: 800;
  letter-spacing: 0;
}

nav {
  display: flex;
  gap: 22px;
  font-size: 14px;
  color: var(--muted);
}

nav a:hover,
.site-footer a:hover {
  color: var(--cyan-strong);
}

.section-shell {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.96fr) minmax(420px, 1.04fr);
  gap: 46px;
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: 46px 0 72px;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--cyan-strong);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 24px;
  font-size: clamp(48px, 8vw, 96px);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  max-width: 860px;
  font-size: clamp(30px, 4vw, 56px);
  line-height: 1.14;
  letter-spacing: 0;
}

h3 {
  font-size: 24px;
  line-height: 1.25;
  letter-spacing: 0;
}

.hero-lede {
  max-width: 660px;
  color: var(--muted);
  font-size: 19px;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-weight: 800;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    background 0.2s ease,
    box-shadow 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: #052b2a;
  border-color: rgba(16, 200, 194, 0.55);
  background: linear-gradient(135deg, rgba(49, 243, 223, 0.9), rgba(139, 199, 255, 0.85));
  box-shadow: 0 16px 42px rgba(16, 200, 194, 0.22);
}

.button.secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: blur(12px);
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 38px 0 0;
}

.signal-strip div {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(18px);
}

.signal-strip dt {
  font-size: 26px;
  font-weight: 900;
  color: var(--ink);
}

.signal-strip dd {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.star-map {
  position: relative;
  min-height: 560px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 50%;
  background:
    radial-gradient(circle at 48% 48%, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.32) 42%, transparent 68%),
    radial-gradient(circle at 58% 36%, rgba(49, 243, 223, 0.16), transparent 30%),
    radial-gradient(circle at 40% 66%, rgba(156, 166, 255, 0.14), transparent 34%);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: breathe 8s ease-in-out infinite;
}

.star-map::before,
.star-map::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(28px);
  opacity: 0.74;
}

.star-map::before {
  inset: 9% -12% auto 10%;
  height: 38%;
  background: rgba(255, 255, 255, 0.78);
  animation: cloud-drift 22s ease-in-out infinite alternate;
}

.star-map::after {
  right: -10%;
  bottom: 8%;
  width: 72%;
  height: 34%;
  background: rgba(228, 247, 251, 0.8);
  animation: cloud-drift 26s ease-in-out infinite alternate-reverse;
}

.star-map svg {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  min-height: 560px;
  overflow: visible;
}

.star-map.is-awake .links line {
  opacity: 1;
  stroke-width: 2;
}

.star-map.is-awake .node circle {
  filter: drop-shadow(0 0 16px rgba(16, 200, 194, 0.58));
}

.orbit {
  fill: none;
  stroke: rgba(23, 33, 38, 0.09);
  stroke-width: 1;
  stroke-dasharray: 5 12;
}

.orbit-two {
  stroke: rgba(16, 200, 194, 0.2);
  animation: dash 18s linear infinite;
}

.links line {
  stroke: url(#lineGlow);
  stroke-width: 1.4;
  animation: pulse-line 5s ease-in-out infinite;
}

.center-node circle:first-child,
.node circle {
  fill: url(#nodeGlow);
}

.center-node circle:last-child {
  fill: rgba(255, 255, 255, 0.76);
  stroke: rgba(16, 200, 194, 0.38);
  stroke-width: 1.2;
}

.center-node text,
.node text {
  text-anchor: middle;
  fill: var(--ink);
  font-size: 15px;
  font-weight: 800;
}

.node {
  transform-box: fill-box;
  transform-origin: center;
  animation: float-node 6s ease-in-out infinite;
}

.node-b {
  animation-delay: -1.1s;
}

.node-c {
  animation-delay: -2.2s;
}

.node-d {
  animation-delay: -3.3s;
}

.node-e {
  animation-delay: -4.4s;
}

.sparkles circle {
  fill: var(--cyan);
  animation: twinkle 3.4s ease-in-out infinite;
}

.sparkles circle:nth-child(even) {
  animation-delay: -1.5s;
}

.section-block {
  padding: 90px 0;
}

.section-heading {
  margin-bottom: 34px;
}

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

.case-card,
.journey-card {
  position: relative;
  min-height: 360px;
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 16% 12%, rgba(49, 243, 223, 0.16), transparent 28%),
    rgba(255, 255, 255, 0.62);
  box-shadow: 0 18px 60px rgba(44, 88, 103, 0.1);
  overflow: hidden;
  transition:
    transform 0.24s ease,
    border-color 0.24s ease,
    box-shadow 0.24s ease;
}

.case-card::before {
  content: "";
  position: absolute;
  inset: auto 24px 24px auto;
  width: 86px;
  height: 86px;
  border-radius: 50%;
  border: 1px solid rgba(16, 200, 194, 0.24);
  background: radial-gradient(circle, rgba(16, 200, 194, 0.2), transparent 68%);
}

.case-card:hover {
  transform: translateY(-8px);
  border-color: rgba(16, 200, 194, 0.44);
  box-shadow: 0 26px 90px rgba(44, 88, 103, 0.18);
}

.case-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 34px;
  border-radius: 50%;
  color: #073331;
  background: rgba(49, 243, 223, 0.46);
  font-weight: 900;
}

.case-card p,
.journey-card p,
.method-flow p,
.contact-section p {
  color: var(--muted);
}

.case-card ul {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 24px 0 0;
  list-style: none;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
}

.case-card li::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 18px rgba(16, 200, 194, 0.75);
}

.method-section {
  position: relative;
}

.method-flow {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.82);
  border-radius: var(--radius);
  background: rgba(23, 33, 38, 0.08);
  box-shadow: var(--shadow);
}

.method-flow div {
  min-height: 248px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.68);
}

.method-flow span {
  display: block;
  margin-bottom: 24px;
  color: var(--cyan-strong);
  font-weight: 900;
}

.method-flow strong {
  display: block;
  font-size: 20px;
  line-height: 1.25;
}

.split-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 42px;
  align-items: start;
}

.journey-list {
  display: grid;
  gap: 14px;
}

.journey-card {
  min-height: auto;
  padding: 24px;
}

.journey-card span {
  color: var(--cyan-strong);
  font-size: 13px;
  font-weight: 900;
}

.journey-card h3 {
  margin: 10px 0 12px;
}

.contact-section {
  margin-bottom: 80px;
  padding: 54px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 80% 18%, rgba(49, 243, 223, 0.2), transparent 24%),
    rgba(255, 255, 255, 0.68);
  box-shadow: var(--shadow);
}

.contact-section h2 {
  max-width: 940px;
}

.wechat {
  margin-top: 20px;
  font-weight: 800;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0 38px;
  color: var(--muted);
  font-size: 14px;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes cloud-drift {
  from {
    transform: translate3d(-16px, -8px, 0) scale(1);
  }

  to {
    transform: translate3d(28px, 14px, 0) scale(1.04);
  }
}

@keyframes breathe {
  0%,
  100% {
    transform: translateY(0) scale(1);
  }

  50% {
    transform: translateY(-8px) scale(1.012);
  }
}

@keyframes dash {
  to {
    stroke-dashoffset: -120;
  }
}

@keyframes pulse-line {
  0%,
  100% {
    opacity: 0.45;
  }

  50% {
    opacity: 0.9;
  }
}

@keyframes float-node {
  0%,
  100% {
    translate: 0 0;
  }

  50% {
    translate: 0 -7px;
  }
}

@keyframes twinkle {
  0%,
  100% {
    opacity: 0.35;
    transform: scale(0.9);
  }

  50% {
    opacity: 1;
    transform: scale(1.25);
  }
}

@media (max-width: 980px) {
  .site-header {
    width: min(100% - 28px, 720px);
  }

  nav {
    display: none;
  }

  .section-shell {
    width: min(100% - 28px, 720px);
  }

  .hero,
  .split-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 36px;
  }

  .star-map {
    min-height: 440px;
  }

  .star-map svg {
    min-height: 440px;
  }

  .case-grid,
  .method-flow {
    grid-template-columns: 1fr;
  }

  .method-flow div {
    min-height: auto;
  }
}

@media (max-width: 640px) {
  h1 {
    font-size: clamp(42px, 14vw, 64px);
  }

  h2 {
    font-size: 30px;
  }

  .hero-lede {
    font-size: 17px;
  }

  .signal-strip {
    grid-template-columns: 1fr;
  }

  .star-map {
    min-height: 340px;
    border-radius: 28px;
  }

  .star-map svg {
    min-height: 340px;
    transform: scale(0.92);
  }

  .section-block {
    padding: 64px 0;
  }

  .case-card {
    min-height: auto;
  }

  .contact-section {
    padding: 30px 20px;
  }

  .site-footer {
    flex-direction: column;
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}