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

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --border: #2a2d3a;
  --accent: #4f8ef7;
  --text-primary: #e8eaf0;
  --text-secondary: #8b90a0;
  --radius: 12px;
}

html, body {
  height: 100%;
}

body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 60px 24px 40px;
  flex: 1;
}

/* Hero */
.hero {
  text-align: center;
  margin-bottom: 48px;
}

.avatar-wrap {
  margin-bottom: 20px;
}

.avatar-placeholder {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #7c5cbf);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0;
}

.name {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}

.bio {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 20px;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 16px;
}

.social-links a {
  color: var(--accent);
  text-decoration: none;
  font-size: 14px;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: background 0.2s, border-color 0.2s;
}

.social-links a:hover {
  background: var(--surface);
  border-color: var(--accent);
}

/* Cards */
.content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
}

.card h2 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.card p {
  font-size: 15px;
  color: var(--text-primary);
}

.skills {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.skills li {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 14px;
  font-size: 13px;
  color: var(--text-secondary);
}

/* Footer */
.footer {
  text-align: center;
  padding: 24px 16px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-secondary);
}

.footer a {
  color: var(--text-secondary);
  text-decoration: none;
}

.footer a:hover {
  color: var(--text-primary);
}

/* Responsive */
@media (max-width: 480px) {
  .container {
    padding: 40px 16px 32px;
  }

  .name {
    font-size: 24px;
  }
}