:root {
  --coral: #e07a5f;
  --coral-deep: #c0564a;
  --ash: #1d1d1d;
  --coal: #2c2c2c;
  --paper: #f4f1ee;
  --card: #fff8f4;
  --mute: #c9ada7;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--ash);
  color: var(--paper);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
  font-size: 17px;
}

a { color: var(--coral); text-decoration: none; }
a:hover { text-decoration: underline; }
svg { display: block; }

.warn-bar {
  background: var(--coral);
  color: var(--ash);
  font-weight: 700;
  font-size: 0.95rem;
}
.warn-bar .wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
}
.warn-bar svg { width: 20px; height: 20px; flex: 0 0 auto; }

.wrap {
  width: min(1080px, calc(100% - 36px));
  margin: 0 auto;
}

.site-header {
  background: var(--coal);
  border-bottom: 1px solid #3a3a3a;
}
.site-header a { color: var(--paper); }
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}
.brand svg { width: 26px; height: 26px; }
.nav { display: flex; flex-wrap: wrap; gap: 12px 16px; font-size: 0.9rem; }

.layout {
  display: grid;
  grid-template-columns: minmax(0, 40rem) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  padding: 32px 0 48px;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(1.7rem, 3.4vw, 2.25rem);
  line-height: 1.28;
  color: #fff;
}
.hero p { margin: 0 0 12px; color: #ddd4ce; }

.section { padding: 28px 0 8px; }
.section h2 {
  margin: 0 0 12px;
  font-size: 1.35rem;
  color: var(--coral);
  line-height: 1.35;
}
.section p { margin: 0 0 12px; color: #ece6e1; }

.spin-demo {
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px dashed var(--coral);
  padding: 12px 14px;
  margin: 14px 0;
  color: var(--mute);
}
.spin {
  width: 22px;
  height: 22px;
  border: 3px solid var(--mute);
  border-top-color: var(--coral);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.side-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding-top: 8px;
}
.issue-card {
  background: var(--card);
  color: var(--ash);
  padding: 16px 16px 18px;
  border-top: 4px solid var(--coral);
}
.issue-card svg { width: 28px; height: 28px; margin-bottom: 8px; }
.issue-card h3 { margin: 0 0 8px; font-size: 1.02rem; }
.issue-card p { margin: 0; color: #3d3d3d; }

.path {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  counter-reset: hop;
}
.path li {
  background: var(--coal);
  border: 1px solid #444;
  padding: 12px 14px 12px 52px;
  position: relative;
}
.path li::before {
  counter-increment: hop;
  content: counter(hop);
  position: absolute;
  left: 12px;
  top: 12px;
  width: 28px;
  height: 28px;
  background: var(--coral);
  color: var(--ash);
  font-weight: 800;
  display: grid;
  place-items: center;
}

.table-wrap { overflow: auto; margin-top: 12px; }
table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
  background: var(--coal);
}
th, td {
  border: 1px solid #444;
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}
th { background: var(--coral); color: var(--ash); }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}
.split article {
  background: var(--coal);
  padding: 14px 16px;
  border: 1px solid #444;
}
.split h3 { margin: 0 0 8px; color: var(--coral); font-size: 1.02rem; }

.faq-block { margin-top: 8px; }
.faq-item {
  background: var(--coal);
  border: 1px solid #444;
  padding: 14px 16px;
  margin-top: 8px;
}
.faq-item h3 { margin: 0 0 8px; font-size: 1.02rem; color: #fff; }
.faq-item p { margin: 0; color: #ddd4ce; }

.site-footer {
  background: #141414;
  color: #c9c0ba;
  padding: 26px 0 34px;
  font-size: 0.92rem;
  border-top: 3px solid var(--coral);
}
.site-footer p { margin: 0 0 10px; }

@media (max-width: 920px) {
  .layout, .split { grid-template-columns: 1fr; }
  .side-grid { grid-template-columns: 1fr 1fr; }
  .site-header .wrap { flex-direction: column; align-items: flex-start; padding: 12px 0; }
}
@media (max-width: 640px) {
  .side-grid { grid-template-columns: 1fr; }
}