:root {
  color-scheme: dark;
  --bg: #100f14;
  --panel: rgba(255, 255, 255, 0.08);
  --panel-strong: rgba(255, 255, 255, 0.14);
  --text: #f7f1e8;
  --muted: #c9bfb1;
  --red: #d7263d;
  --gold: #f5b841;
  --line: rgba(255, 255, 255, 0.18);
  font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(215, 38, 61, 0.28), transparent 34rem),
    radial-gradient(circle at bottom right, rgba(245, 184, 65, 0.20), transparent 30rem),
    var(--bg);
  color: var(--text);
}

.hero {
  min-height: 82vh;
  display: grid;
  grid-template-rows: auto 1fr;
  padding: 28px clamp(20px, 5vw, 72px) 56px;
}

.nav {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.nav a {
  color: var(--text);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.05);
}

.nav a:hover {
  border-color: var(--gold);
}

.hero-content {
  align-self: center;
  max-width: 980px;
}

.eyebrow,
.section-number {
  color: var(--gold);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 700;
}

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

h1 {
  font-size: clamp(3rem, 10vw, 8rem);
  line-height: 0.95;
  margin-bottom: 26px;
}

h2 {
  font-size: clamp(2rem, 5vw, 4.6rem);
  line-height: 1.05;
  margin-bottom: 14px;
}

.lead {
  max-width: 760px;
  color: var(--muted);
  font-size: clamp(1.1rem, 2vw, 1.45rem);
  line-height: 1.8;
}

main {
  display: grid;
  gap: 24px;
  padding: 0 clamp(20px, 5vw, 72px) 48px;
}

.panel {
  min-height: 78vh;
  display: grid;
  grid-template-columns: minmax(240px, 0.85fr) minmax(280px, 1.15fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: center;
  padding: clamp(28px, 6vw, 72px);
  border: 1px solid var(--line);
  border-radius: 36px;
  background: var(--panel);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.28);
  overflow: hidden;
  position: relative;
}

.panel::after {
  content: "";
  position: absolute;
  inset: auto -10% -35% auto;
  width: 30rem;
  height: 30rem;
  border-radius: 50%;
  background: rgba(245, 184, 65, 0.08);
  pointer-events: none;
}

.panel-body {
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.9;
  position: relative;
  z-index: 1;
}

.panel-body p {
  font-size: clamp(1.05rem, 1.7vw, 1.28rem);
}

.years {
  color: var(--muted);
  font-weight: 700;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 28px;
}

.timeline span,
li {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 16px;
  background: rgba(0, 0, 0, 0.16);
}

.timeline strong {
  display: block;
  color: var(--gold);
  font-size: 1.35rem;
}

ul {
  display: grid;
  gap: 12px;
  list-style: none;
  padding: 0;
  margin: 26px 0 0;
}

.red {
  background: linear-gradient(135deg, rgba(215, 38, 61, 0.22), var(--panel));
}

.dark {
  background: linear-gradient(135deg, rgba(28, 28, 38, 0.9), var(--panel-strong));
}

.gold {
  background: linear-gradient(135deg, rgba(245, 184, 65, 0.18), var(--panel));
}

footer {
  color: var(--muted);
  text-align: center;
  padding: 12px 24px 40px;
}

@media (max-width: 820px) {
  .hero {
    min-height: 72vh;
  }

  .nav {
    justify-content: flex-start;
  }

  .panel {
    min-height: auto;
    grid-template-columns: 1fr;
    border-radius: 26px;
  }

  .timeline {
    grid-template-columns: 1fr;
  }
}