/* ===== 羊角快车博客 v2.0.0 全局样式 ===== */
:root {
  /* 浅色模式变量 */
  --bg: #f8f9fa;
  --text: #2c3e50;
  --link: #3498db;
  --link-hover: #2980b9;
  --border: #e1e8ed;
  --card-bg: #ffffff;
  --header-bg: #ffffff;
  --footer-bg: #ffffff;
  /* 多彩按钮 */
  --btn-primary: #3498db;
  --btn-success: #2ecc71;
  --btn-warning: #f39c12;
  --btn-danger: #e74c3c;
  --btn-info: #00bcd4;
  --btn-purple: #9b59b6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1e24;
    --text: #e9ecef;
    --link: #5faee3;
    --link-hover: #8fc9ff;
    --border: #2d3748;
    --card-bg: #252b33;
    --header-bg: #1f2937;
    --footer-bg: #1f2937;
    --btn-primary: #3b82f6;
    --btn-success: #10b981;
    --btn-warning: #f59e0b;
    --btn-danger: #ef4444;
    --btn-info: #06b6d4;
    --btn-purple: #8b5cf6;
  }
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  line-height: 1.6;
  transition: background 0.3s, color 0.3s;
}
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}
/* 导航栏 */
header {
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo a {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--text);
  text-decoration: none;
  background: linear-gradient(135deg, var(--btn-primary), var(--btn-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 1.2rem;
  align-items: center;
  flex-wrap: wrap;
}
.nav-links li a {
  color: var(--text);
  text-decoration: none;
  padding: 0.5rem 0.8rem;
  border-radius: 20px;
  transition: all 0.2s;
  font-weight: 500;
}
.nav-links li a:hover {
  background: var(--btn-primary);
  color: white;
}
/* 多彩按钮 */
.btn {
  display: inline-block;
  padding: 0.5rem 1.2rem;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  margin: 0.2rem;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.btn-primary { background: var(--btn-primary); color: white; }
.btn-success { background: var(--btn-success); color: white; }
.btn-warning { background: var(--btn-warning); color: white; }
.btn-danger { background: var(--btn-danger); color: white; }
.btn-info { background: var(--btn-info); color: white; }
.btn-purple { background: var(--btn-purple); color: white; }
.btn-outline {
  background: transparent;
  border: 2px solid var(--btn-primary);
  color: var(--btn-primary);
}
.btn-outline:hover {
  background: var(--btn-primary);
  color: white;
}
/* 登录按钮特殊样式 */
.btn-login {
  background: linear-gradient(145deg, var(--btn-info), var(--btn-purple));
  color: white;
  border: none;
  padding: 0.5rem 1.5rem;
  border-radius: 30px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s;
}
.btn-login:hover {
  transform: scale(1.05);
  box-shadow: 0 0 15px var(--btn-info);
}
/* 页面主体 */
main {
  padding: 2rem 0;
  min-height: 70vh;
}
h1 {
  margin-bottom: 1.5rem;
  font-size: 2.2rem;
  background: linear-gradient(135deg, var(--btn-primary), var(--btn-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}
h2 {
  margin: 2rem 0 1rem;
  font-size: 1.6rem;
  border-left: 5px solid var(--btn-primary);
  padding-left: 1rem;
}
/* 卡片网格 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.8rem;
  margin-top: 1.5rem;
}
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  transition: all 0.3s;
  box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 20px rgba(0,0,0,0.1);
  border-color: var(--btn-primary);
}
.card h3 {
  margin-bottom: 0.8rem;
  font-size: 1.3rem;
}
.card h3 a {
  color: var(--btn-primary);
  text-decoration: none;
}
.card p {
  color: var(--text);
  opacity: 0.8;
  font-size: 0.95rem;
  margin-bottom: 1rem;
}
/* 文章列表 */
.article-list {
  list-style: none;
}
.article-item {
  padding: 1.2rem;
  margin-bottom: 1rem;
  background: var(--card-bg);
  border-radius: 12px;
  border-left: 4px solid transparent;
  transition: all 0.2s;
}
.article-item:hover {
  border-left-color: var(--btn-primary);
  transform: translateX(5px);
}
.article-item a {
  color: var(--btn-primary);
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: 600;
}
.article-item .meta {
  font-size: 0.9rem;
  opacity: 0.7;
  margin-top: 0.5rem;
}
/* 页脚 */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  text-align: center;
  background: var(--footer-bg);
  margin-top: 3rem;
}
/* 响应式 */
@media (max-width: 768px) {
  nav {
    flex-direction: column;
    gap: 1rem;
  }
  .nav-links {
    justify-content: center;
  }
  .card-grid {
    grid-template-columns: 1fr;
  }
  }