:root {
  --indigo: #1b2266;
  --indigo-2: #2a3488;
  --amber: #e39b14;
  --amber-soft: #f6d48a;
  --ink: #16182c;
  --paper: #f4f2fb;
  --muted: #4a4d68;
  --line: #c9c6de;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: auto; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.7;
}

a { color: var(--indigo-2); }
.navtop {
  background: var(--indigo);
  color: #efe9ff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 4%;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.navtop nav a {
  color: var(--amber-soft);
  text-decoration: none;
  margin-left: 12px;
  font-size: 14px;
}

.hero {
  background: linear-gradient(120deg, var(--indigo) 0%, #3a2f7a 70%);
  color: #f7f3ff;
  padding: 36px 4% 28px;
}
.hero h1 { font-size: 28px; margin-bottom: 12px; }
.hero p { max-width: 46em; margin-bottom: 8px; color: #ddd6f5; }

.layout-84 {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
  padding: 28px 4% 48px;
  align-items: start;
}
.col-8 h2, .full h2 {
  font-size: 21px;
  color: var(--indigo);
  margin: 22px 0 12px;
}
.col-8 p { margin-bottom: 10px; }

.wave {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px;
  margin: 12px 0 20px;
}
.wave-bars {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 64px;
  margin: 10px 0;
}
.wave-bars span {
  display: block;
  width: 6px;
  background: var(--indigo-2);
  border-radius: 2px;
}
.wave-bars span:nth-child(3n) { background: var(--amber); }
.wave meta, .wave .meta {
  font-size: 13px;
  color: var(--muted);
}

.feat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.feat-grid article {
  background: #fff;
  border: 1px solid var(--line);
  padding: 14px;
}
.feat-grid h3 { color: var(--indigo); margin: 8px 0; font-size: 16px; }

.rail-steps {
  background: var(--indigo);
  color: #efeaff;
  padding: 16px 14px 20px;
  border-radius: 8px 0 0 8px;
  border-left: 6px solid var(--amber);
}
.rail-steps h2 { color: var(--amber-soft); font-size: 17px; margin-bottom: 12px; }
.rail-steps ol { list-style: none; }
.rail-steps li {
  padding: 10px 0 10px 12px;
  border-left: 2px solid var(--amber);
  margin-left: 8px;
  font-size: 14px;
}
.rail-steps strong { display: block; color: var(--amber-soft); margin-bottom: 4px; }

.compare-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.compare-2 > div {
  background: #fff;
  padding: 14px;
  border-top: 4px solid var(--amber);
}
.compare-2 h3 { color: var(--indigo); margin-bottom: 8px; }

.full { padding: 0 4% 36px; }
.faq details {
  background: #fff;
  border: 1px solid var(--line);
  margin: 8px 0;
  padding: 10px 14px;
}
.faq summary { cursor: pointer; font-weight: 600; color: var(--indigo); }
.faq details p { margin-top: 8px; }

footer {
  background: #12153d;
  color: #d4d0ea;
  padding: 24px 4% 34px;
  font-size: 13px;
}
footer p { margin: 8px 0; }
footer .copy { color: var(--amber); margin-top: 14px; }

@media (max-width: 900px) {
  .layout-84, .feat-grid, .compare-2 { grid-template-columns: 1fr; }
  .navtop { flex-direction: column; align-items: flex-start; gap: 8px; }
}