/* m: centered brand stack + cream mosaic */
:root {
  --bg: #fff8f0;
  --bar: #7c2d12;
  --accent: #b45309;
  --cream: #fff7ed;
  --card: #ffedd5;
  --ink: #1c1917;
  --muted: #57534e;
  --line: #fed7aa;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Century Gothic", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

img,
svg {
  max-width: 100%;
}

a {
  color: var(--accent);
}

.topbar {
  background: var(--bar);
  color: #fff7ed;
  text-align: center;
  padding: 18px 16px 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff7ed;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
}

.brand svg {
  flex-shrink: 0;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 22px;
  margin-top: 12px;
}

.nav a {
  color: #ffedd5;
  text-decoration: none;
  border-bottom: 2px solid #fbbf24;
  padding-bottom: 2px;
  font-size: 0.92rem;
}

.nav a:hover,
.nav a:focus {
  color: #fff;
}

.shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: start;
  margin-bottom: 42px;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: 2rem;
  line-height: 1.35;
  color: var(--bar);
}

.hero p {
  margin: 0 0 12px;
  color: var(--muted);
}

.mosaic {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.tile {
  background: var(--card);
  border: 1px solid var(--line);
  min-height: 110px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.tile strong {
  display: block;
  margin-top: 8px;
  color: var(--bar);
  font-size: 0.95rem;
}

.block {
  margin: 0 0 40px;
}

.block h2 {
  margin: 0 0 12px;
  color: var(--bar);
  font-size: 1.45rem;
}

.lead,
.block p {
  margin: 0 0 12px;
  color: #44403c;
}

.quad {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.card {
  background: var(--cream);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  padding: 16px;
}

.card h3 {
  margin: 10px 0 8px;
  font-size: 1.05rem;
  color: var(--bar);
}

.card p {
  margin: 0;
  font-size: 0.95rem;
}

.sheet {
  width: 100%;
  border-collapse: collapse;
  background: var(--cream);
}

.sheet th,
.sheet td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

.sheet th {
  background: #ffedd5;
  color: var(--bar);
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.pane {
  background: var(--cream);
  border: 1px solid var(--line);
  padding: 18px;
}

.pane h3 {
  margin: 0 0 10px;
  color: var(--accent);
}

.rail {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 12px;
  background: var(--cream);
  border: 1px solid var(--line);
  border-bottom: none;
  padding: 16px;
}

.rail .step:last-child {
  border-bottom: 1px solid var(--line);
}

.num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bar);
  color: #fff7ed;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.step h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
}

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

.list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.list li {
  background: var(--cream);
  border: 1px solid var(--line);
  padding: 12px 14px;
  margin: 0 0 8px;
}

.bound {
  background: #ffedd5;
  border: 1px dashed var(--accent);
  padding: 18px 20px;
}

.faq details {
  background: var(--cream);
  border: 1px solid var(--line);
  padding: 12px 14px;
  margin: 0 0 8px;
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--bar);
}

.faq details p {
  margin: 10px 0 0;
}

.foot {
  background: var(--bar);
  color: #ffedd5;
  padding: 28px 16px;
}

.foot-inner {
  width: min(1120px, calc(100% - 8px));
  margin: 0 auto;
}

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

@media (max-width: 900px) {
  .hero,
  .quad,
  .split,
  .trio {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .hero,
  .quad,
  .split,
  .trio,
  .mosaic {
    grid-template-columns: 1fr;
  }
}