/* Chunk Box 官网基础样式 */

:root {
  --color-primary: #2563eb;
  --color-text: #1f2937;
  --color-text-secondary: #4b5563;
  --color-bg: #f8fafc;
  --color-card: #ffffff;
  --color-border: #e5e7eb;
  --color-link: #2563eb;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

header {
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

nav a {
  margin-left: 1.5rem;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  text-decoration: none;
}

nav a:hover,
nav a.active {
  color: var(--color-link);
}

main {
  max-width: 800px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
  background-color: var(--color-card);
  min-height: calc(100vh - 140px);
}

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

h2 {
  font-size: 1.35rem;
  font-weight: 600;
  margin-top: 2.25rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1rem;
  color: var(--color-text-secondary);
}

ul, ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
  color: var(--color-text-secondary);
}

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

a:hover {
  text-decoration: underline;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.95rem;
}

th, td {
  border: 1px solid var(--color-border);
  padding: 0.75rem;
  text-align: left;
  vertical-align: top;
}

th {
  background-color: #f3f4f6;
  font-weight: 600;
  color: var(--color-text);
}

.meta {
  font-size: 0.9rem;
  color: #6b7280;
  margin-bottom: 2rem;
}

footer {
  background-color: var(--color-card);
  border-top: 1px solid var(--color-border);
  padding: 1.5rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

@media (max-width: 640px) {
  main {
    padding: 1.5rem 1rem 3rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.2rem;
  }

  th, td {
    padding: 0.5rem;
    font-size: 0.9rem;
  }
}