:root {
  --accent: #29d3c8;
  --accent-2: #ff4655;
  --bg: #0b0f14;
  --panel: rgba(16, 22, 30, 0.92);
  --text: #e8eef5;
  --muted: #8b98a8;
  --line: rgba(255, 255, 255, 0.08);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  background:
    radial-gradient(ellipse at top, rgba(41, 211, 200, 0.08), transparent 45%),
    radial-gradient(ellipse at bottom right, rgba(255, 70, 85, 0.06), transparent 40%),
    var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.7;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 22px;
  background: rgba(11, 15, 20, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.brand {
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text);
}

.brand span {
  color: var(--accent);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  font-size: 14px;
}

.nav a {
  color: var(--muted);
}

.nav a:hover,
.nav a.active {
  color: var(--accent);
  text-decoration: none;
}

.wrap {
  width: min(820px, 92vw);
  margin: 36px auto 64px;
  padding: 34px 36px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

h1 {
  font-size: 30px;
  letter-spacing: 1px;
  margin-bottom: 8px;
  background: linear-gradient(90deg, var(--accent), #6ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  color: var(--muted);
  margin-bottom: 28px;
  font-size: 14px;
}

h2 {
  margin: 28px 0 10px;
  font-size: 20px;
  color: var(--text);
}

p,
li {
  color: #c9d4e0;
  font-size: 15px;
  margin-bottom: 12px;
}

ul,
ol {
  padding-left: 1.25em;
  margin-bottom: 14px;
}

li {
  margin-bottom: 8px;
}

.meta {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 22px;
}

.cta {
  display: inline-block;
  margin-top: 8px;
  padding: 10px 18px;
  border-radius: 10px;
  background: rgba(41, 211, 200, 0.12);
  border: 1px solid rgba(41, 211, 200, 0.35);
  color: var(--accent);
  font-weight: 600;
}

.cta:hover {
  background: rgba(41, 211, 200, 0.2);
  text-decoration: none;
}

.site-footer {
  width: min(820px, 92vw);
  margin: 0 auto 40px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.site-footer a {
  color: var(--muted);
  margin: 0 8px;
}

.site-footer a:hover {
  color: var(--accent);
}

@media (max-width: 640px) {
  .wrap {
    padding: 24px 20px;
    margin-top: 22px;
  }

  h1 {
    font-size: 24px;
  }

  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }
}