:root {
  --gold: #f4b728;
  --gold-strong: #d99600;
  --ink: #171717;
  --muted: #62615d;
  --paper: #fffaf0;
  --line: #ded6c8;
  --green: #1e6b58;
  --blue: #245d86;
  --rose: #b04c5f;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(244, 183, 40, 0.14), transparent 360px),
    var(--paper);
  font-family:
    Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui,
    -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 5vw, 64px);
  border-bottom: 1px solid rgba(23, 23, 23, 0.1);
  background: rgba(255, 250, 240, 0.9);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--gold);
  font-weight: 900;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav a {
  padding: 8px 10px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

.nav a:hover {
  background: rgba(244, 183, 40, 0.22);
  color: var(--ink);
}

main {
  overflow: hidden;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(340px, 0.94fr);
  gap: clamp(28px, 5vw, 74px);
  align-items: center;
  min-height: calc(100vh - 70px);
  padding: clamp(44px, 7vw, 90px) clamp(18px, 5vw, 64px) 44px;
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 20px;
  font-size: clamp(44px, 7vw, 88px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 20px;
  line-height: 1.2;
}

.lead {
  max-width: 680px;
  color: #3d3a35;
  font-size: clamp(18px, 2vw, 22px);
}

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

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  border-radius: 6px;
  padding: 10px 16px;
  font-weight: 800;
  text-decoration: none;
}

.button.primary {
  background: var(--ink);
  color: var(--white);
}

.button.secondary {
  background: var(--gold);
}

.hero-visual {
  min-height: 480px;
  position: relative;
  display: grid;
  place-items: center;
}

.coin-orbit {
  position: relative;
  width: min(86vw, 500px);
  aspect-ratio: 1;
  border: 1px solid rgba(23, 23, 23, 0.18);
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, rgba(244, 183, 40, 0.48), transparent 31%),
    radial-gradient(circle at 16% 18%, rgba(30, 107, 88, 0.2), transparent 24%),
    radial-gradient(circle at 80% 75%, rgba(36, 93, 134, 0.18), transparent 26%),
    rgba(255, 255, 255, 0.52);
  box-shadow: 0 24px 70px rgba(23, 23, 23, 0.13);
}

.coin-orbit::before,
.coin-orbit::after {
  position: absolute;
  inset: 14%;
  content: "";
  border: 1px dashed rgba(23, 23, 23, 0.22);
  border-radius: 50%;
}

.coin-orbit::after {
  inset: 29%;
}

.coin {
  position: absolute;
  left: 50%;
  top: 50%;
  display: grid;
  width: 138px;
  aspect-ratio: 1;
  place-items: center;
  transform: translate(-50%, -50%);
  border: 3px solid var(--ink);
  border-radius: 50%;
  background: var(--gold);
  box-shadow: inset 0 0 0 8px rgba(255, 255, 255, 0.28);
  font-size: 30px;
  font-weight: 950;
}

.node {
  position: absolute;
  display: grid;
  min-width: 92px;
  min-height: 42px;
  place-items: center;
  border: 1px solid rgba(23, 23, 23, 0.2);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--ink);
  font-weight: 800;
  box-shadow: 0 10px 24px rgba(23, 23, 23, 0.1);
}

.node-wallet {
  left: 9%;
  top: 24%;
  border-color: rgba(30, 107, 88, 0.45);
}

.node-sdk {
  right: 8%;
  top: 27%;
  border-color: rgba(36, 93, 134, 0.45);
}

.node-grant {
  right: 19%;
  bottom: 13%;
  border-color: rgba(176, 76, 95, 0.45);
}

.node-cn {
  left: 18%;
  bottom: 15%;
  border-color: rgba(217, 150, 0, 0.55);
}

.mission,
.section {
  padding: clamp(48px, 7vw, 88px) clamp(18px, 5vw, 64px);
}

.mission {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.7fr);
  gap: 34px;
  border-block: 1px solid var(--line);
  background: var(--white);
}

.mission p,
.section-head p,
.contact p {
  max-width: 760px;
  color: var(--muted);
  font-size: 17px;
}

.mission-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.mission-list li {
  border-left: 4px solid var(--gold);
  padding: 12px 14px;
  background: #fbf3df;
  font-weight: 750;
}

.section-head {
  margin-bottom: 24px;
}

.path-grid,
.resource-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.path-card,
.resource,
.grant-note,
.contact-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 12px 30px rgba(23, 23, 23, 0.06);
}

.path-card {
  display: flex;
  min-height: 282px;
  flex-direction: column;
  padding: 20px;
}

.path-card p {
  color: var(--muted);
}

.path-card a {
  margin-top: auto;
  color: var(--blue);
  font-weight: 850;
  text-decoration: none;
}

.icon {
  display: inline-grid;
  width: 38px;
  height: 38px;
  place-items: center;
  margin-bottom: 22px;
  border-radius: 6px;
  background: var(--gold);
  font-weight: 900;
}

.split {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(320px, 1fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
  background: #f7efe2;
}

.timeline {
  display: grid;
  gap: 12px;
}

.timeline article {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 14px;
  align-items: start;
  border-bottom: 1px solid var(--line);
  padding: 16px 0;
}

.timeline strong {
  color: var(--green);
}

.timeline span {
  color: var(--muted);
}

.grants {
  background: var(--white);
}

.grant-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.grant-note {
  padding: 24px;
}

.grant-note.accent {
  background: #eff7f2;
  border-color: rgba(30, 107, 88, 0.28);
}

.grant-note ul {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.resource-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.resource {
  display: grid;
  min-height: 150px;
  align-content: start;
  gap: 10px;
  padding: 20px;
  text-decoration: none;
}

.resource:hover {
  border-color: var(--gold-strong);
  transform: translateY(-2px);
}

.resource span {
  color: var(--muted);
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.48fr);
  gap: 24px;
  align-items: center;
  background: #f0f5f8;
}

.contact-box {
  display: grid;
  gap: 8px;
  padding: 24px;
  border-color: rgba(36, 93, 134, 0.28);
}

.contact-box strong {
  color: var(--blue);
  font-size: 20px;
}

.contact-box span {
  color: var(--muted);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 24px clamp(18px, 5vw, 64px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.footer a {
  font-weight: 800;
  text-decoration: none;
}

@media (max-width: 980px) {
  .hero,
  .mission,
  .split,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    min-height: 360px;
  }

  .path-grid,
  .resource-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .topbar {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
  }

  .nav a {
    padding-inline: 6px;
  }

  h1 {
    font-size: 42px;
  }

  .actions,
  .button {
    width: 100%;
  }

  .path-grid,
  .resource-grid,
  .grant-layout {
    grid-template-columns: 1fr;
  }

  .path-card {
    min-height: 220px;
  }

  .timeline article {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .hero-visual {
    min-height: 320px;
  }

  .node {
    min-width: 76px;
    min-height: 36px;
    font-size: 13px;
  }

  .coin {
    width: 112px;
    font-size: 24px;
  }

  .footer {
    flex-direction: column;
  }
}