:root {
  --bg: #052e16;
  --panel: #0b3d1f;
  --acid: #a3e635;
  --acid-dim: #65a30d;
  --ink: #ecfccb;
  --muted: #bbf7d0;
  --void: #022c16;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
}

body {
  margin: 0;
  font-family: "Consolas", "Sarasa Gothic SC", "Microsoft YaHei", monospace;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
}

a {
  color: var(--acid);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.shell {
  width: min(1100px, calc(100% - 28px));
  margin: 0 auto;
}

.bar {
  background: #02140c;
  border-bottom: 1px solid var(--acid);
}

.bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--acid);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.nav a {
  font-size: 13px;
  text-transform: none;
}

.hero {
  padding: 42px 0 18px;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.25;
  color: var(--acid);
}

.hero p {
  margin: 0 0 8px;
  max-width: 44em;
  color: var(--muted);
}

.chain {
  display: grid;
  grid-template-columns: 1fr 28px 1fr 28px 1fr;
  align-items: stretch;
  margin: 10px 0 36px;
}

.node {
  background: var(--void);
  border: 1px solid var(--acid-dim);
  padding: 16px;
}

.node strong {
  display: block;
  color: var(--acid);
  margin-bottom: 8px;
  font-size: 14px;
  letter-spacing: 0.08em;
}

.node p {
  margin: 0;
  font-size: 14px;
}

.link {
  display: grid;
  place-items: center;
}

.cost {
  margin: 0 0 36px;
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--acid);
}

.cost h2 {
  margin: 0 0 12px;
  color: var(--acid);
  font-size: 22px;
}

.meter {
  height: 18px;
  border: 1px solid var(--acid);
  display: grid;
  grid-template-columns: 18% 47% 35%;
}

.meter span:nth-child(1) { background: #365314; }
.meter span:nth-child(2) { background: #4d7c0f; }
.meter span:nth-child(3) { background: #a3e635; }

.legend {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

.slab {
  margin: 0 0 36px;
}

.slab h2 {
  margin: 0 0 12px;
  color: var(--acid);
  font-size: 22px;
}

.slab h3 {
  margin: 0 0 12px;
  color: var(--acid);
  font-size: 18px;
}

.slab > p {
  margin: 0 0 12px;
}

.trio {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.trio article {
  background: var(--void);
  border: 1px solid var(--acid-dim);
  padding: 14px;
}

.trio h3 {
  margin: 0 0 8px;
  color: var(--acid);
  font-size: 16px;
}

.trio p {
  margin: 0 0 8px;
  font-size: 14px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  border: 1px solid var(--acid-dim);
  padding: 10px;
  text-align: left;
  vertical-align: top;
}

th {
  background: #022c16;
  color: var(--acid);
}

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: n;
}

.steps li {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 12px;
  border-top: 1px solid var(--acid-dim);
  padding: 12px 0;
}

.steps li::before {
  counter-increment: n;
  content: counter(n, decimal-leading-zero);
  color: var(--acid);
  font-weight: 700;
}

dl.faq {
  margin: 0;
}

dt {
  margin: 16px 0 6px;
  color: var(--acid);
  font-weight: 700;
}

dd {
  margin: 0;
  padding: 10px 12px;
  border-left: 3px solid var(--acid);
  background: var(--void);
  color: var(--muted);
}

.foot {
  border-top: 1px solid var(--acid);
  background: #02140c;
  padding: 24px 0 32px;
  color: #86efac;
  font-size: 13px;
}

.foot p {
  margin: 0 0 8px;
}

@media (max-width: 860px) {
  .bar-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 0;
  }

  .chain,
  .trio,
  .legend {
    grid-template-columns: 1fr;
  }

  .link {
    min-height: 20px;
  }
}