:root {
  color-scheme: light;
  --bg: #f6f2ea;
  --ink: #1f2933;
  --muted: #637083;
  --card: #fffaf1;
  --line: #e4d6c2;
  --brand: #0f766e;
  --brand-dark: #115e59;
  --accent: #f59e0b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at top left, #fff7df 0, var(--bg) 36rem);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  line-height: 1.7;
}

.hero,
main,
footer {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  padding: 72px 0 42px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.brand-lockup img {
  width: 64px;
  height: 64px;
  flex: 0 0 auto;
  object-fit: contain;
}

.eyebrow {
  margin: 0;
  color: var(--brand);
  font-weight: 800;
  letter-spacing: 0.2em;
}

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

h1 {
  max-width: 780px;
  margin-bottom: 18px;
  font-size: clamp(2.2rem, 7vw, 4.8rem);
  line-height: 1.05;
}

h2 {
  margin-bottom: 18px;
  font-size: 1.65rem;
}

h3 {
  margin-bottom: 8px;
  color: var(--brand-dark);
}

.lead {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.18rem;
}

.copy-card,
.panel {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 250, 241, 0.9);
  box-shadow: 0 22px 60px rgba(93, 64, 34, 0.11);
}

.copy-card {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  max-width: 720px;
  margin-top: 28px;
  padding: 18px;
}

.copy-card strong {
  padding: 8px 12px;
  border-radius: 999px;
  background: #ecfdf5;
  color: var(--brand-dark);
  font-size: 1.1rem;
}

button {
  border: 0;
  border-radius: 999px;
  background: var(--brand);
  color: white;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  padding: 10px 18px;
}

button:hover {
  background: var(--brand-dark);
}

.secondary {
  margin-top: 8px;
  background: #92400e;
}

.secondary:hover {
  background: #78350f;
}

small,
.notice {
  color: var(--muted);
}

.blocker {
  border: 1px solid #fbbf24;
  border-radius: 18px;
  background: #fffbeb;
  color: #78350f;
  padding: 14px 16px;
}

main {
  display: grid;
  gap: 22px;
  padding-bottom: 44px;
}

.panel {
  padding: clamp(22px, 4vw, 34px);
}

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

article {
  border-left: 4px solid var(--accent);
  padding-left: 16px;
}

.steps,
.progress {
  padding-left: 1.25rem;
}

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

.wiring-list p,
.progress li {
  margin: 0;
  padding: 14px 16px;
  border-radius: 18px;
  background: #fff4df;
}

.wiring-list span,
.progress strong {
  display: inline-block;
  min-width: 84px;
  color: #92400e;
}

.progress {
  display: grid;
  gap: 12px;
  list-style: none;
  padding-left: 0;
}

.progress li {
  display: flex;
  gap: 12px;
}

footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  padding: 22px 0 36px;
  text-align: center;
}

footer p {
  margin-bottom: 6px;
}

@media (max-width: 760px) {
  .brand-lockup img {
    width: 52px;
    height: 52px;
  }

  .grid,
  .wiring-list {
    grid-template-columns: 1fr;
  }

  .progress li {
    display: block;
  }
}