:root {
  --bg: #f3f8ff;
  --bg-2: #eaf3ff;
  --panel: #ffffff;
  --panel-2: #f7fbff;
  --line: #d5e5fb;
  --text: #122642;
  --sub: #4f6f95;
  --brand: #2f7cff;
  --brand-2: #00b6d6;
  --chip: #eaf2ff;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background:
    radial-gradient(1200px 700px at 10% -20%, #d4e8ff 0%, transparent 70%),
    radial-gradient(900px 520px at 110% 10%, #d7f5ff 0%, transparent 70%),
    linear-gradient(160deg, var(--bg), #eef6ff 45%, #eaf2ff 100%);
  color: var(--text);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.bg-shape {
  position: fixed;
  z-index: 0;
  pointer-events: none;
}

.bg-a {
  width: 380px;
  height: 380px;
  border-radius: 999px;
  right: -120px;
  top: -80px;
  background: radial-gradient(circle, rgba(47, 124, 255, 0.24), rgba(47, 124, 255, 0));
}

.bg-b {
  width: 360px;
  height: 360px;
  border-radius: 999px;
  left: -140px;
  bottom: -120px;
  background: radial-gradient(circle, rgba(0, 182, 214, 0.2), rgba(0, 182, 214, 0));
}

.hero,
.content {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero {
  padding-top: 40px;
}

.hero-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chip {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid #b8d2f7;
  background: var(--chip);
  color: #2d5f9e;
  font-size: 12px;
  letter-spacing: 0.4px;
}

.ghost-link {
  color: #4b72a6;
  text-decoration: none;
  border-bottom: 1px dotted #7ea6db;
}

h1 {
  margin: 20px 0 0;
  font-size: clamp(32px, 5vw, 58px);
  line-height: 1.08;
  letter-spacing: 0.4px;
  max-width: 980px;
}

.lead {
  margin: 16px 0 0;
  max-width: 840px;
  color: var(--sub);
  font-size: 18px;
  line-height: 1.75;
}

.hero-actions {
  margin-top: 24px;
}

.btn {
  display: inline-block;
  padding: 11px 20px;
  border-radius: 12px;
  border: 1px solid #a8c9f8;
  text-decoration: none;
  color: var(--text);
}

.btn-primary {
  border-color: #2f7cff;
  background: linear-gradient(130deg, #2f7cff, #00b6d6);
  color: #ffffff;
  font-weight: 700;
}

.content {
  padding-top: 24px;
  padding-bottom: 50px;
}

.panel {
  margin-top: 14px;
  background: linear-gradient(170deg, rgba(255, 255, 255, 0.97), rgba(247, 251, 255, 0.96));
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
}

h2 {
  margin: 0 0 14px;
  font-size: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.card {
  border: 1px solid #d6e7ff;
  border-radius: 12px;
  padding: 14px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.98), rgba(245, 250, 255, 0.97));
}

.card h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.card p {
  margin: 0;
  color: #56779f;
  line-height: 1.7;
}

.alliance-list {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.alliance-item {
  padding: 7px 10px;
  border-radius: 10px;
  border: 1px solid #c9dfff;
  background: rgba(237, 246, 255, 0.95);
  color: #335e93;
  font-size: 13px;
}

.small-note {
  margin: 10px 0 0;
  color: #6d8cb3;
  font-size: 12px;
}

pre {
  margin: 12px 0 0;
  padding: 14px;
  border-radius: 12px;
  border: 1px solid #d7e8ff;
  background: #f4f9ff;
  color: #1f4f89;
  overflow-x: auto;
}

code {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
}

.hint {
  margin: 10px 0 0;
  color: #2a6ea0;
}

@media (max-width: 980px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }
}