/* 蒲公英信审学院 - 全局样式 (含完整移动端适配) */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Microsoft YaHei", Arial, sans-serif;
}
:root {
  --primary: #0A2558;
  --secondary: #E8F1FF;
  --accent: #C9A961;
  --white: #ffffff;
  --gray: #6B7280;
}
body {
  background-color: var(--white);
  line-height: 1.6;
}

/* ========== 导航栏 ========== */
.navbar {
  background-color: var(--primary);
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 1000;
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}
.logo {
  color: var(--white);
  font-size: 24px;
  font-weight: bold;
}
.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}
.nav-menu a {
  color: var(--white);
  text-decoration: none;
  font-size: 16px;
}

/* 汉堡菜单按钮（默认隐藏） */
.hamburger {
  display: none;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  padding: 8px 14px;
  border-radius: 6px;
  color: var(--white);
  font-size: 14px;
}
.hamburger:hover {
  background: rgba(255,255,255,0.25);
}
.hamburger .bar-wrap {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.hamburger .bar-wrap span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--white);
  border-radius: 2px;
}

/* ========== 移动端适配 ========== */
@media (max-width: 768px) {
  .nav-container {
    flex-wrap: wrap;
  }
  
  .hamburger {
    display: flex;
  }
  
  .nav-menu {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 0;
    margin-top: 1rem;
    background-color: #0d2e6e;
    border-radius: 8px;
    overflow: hidden;
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .nav-menu li {
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }
  
  .nav-menu li:last-child {
    border-bottom: none;
  }
  
  .nav-menu a {
    display: block;
    padding: 14px 20px;
    font-size: 16px;
  }
  
  .banner {
    padding: 2rem 1rem;
  }
  .banner h1 {
    font-size: 22px;
  }
  .banner p {
    font-size: 14px;
  }
  
  .container {
    padding: 1rem;
  }
  
  .grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .btn {
    display: block;
    text-align: center;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ========== 通用组件 ========== */
.banner {
  background: linear-gradient(135deg, var(--primary), #10367A);
  color: var(--white);
  padding: 4rem 2rem;
  text-align: center;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}
.card {
  background: var(--white);
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  overflow: hidden;
  transition: 0.3s;
}
.card:hover {
  transform: translateY(-5px);
}
.card-img {
  position: relative;
  width: 100%;
  padding-top: 133.333%;
  background-color: var(--secondary);
  overflow: hidden;
}
.card-img img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border: none;
  display: block;
}
.card-body {
  padding: 1.5rem;
}
.card-title {
  font-size: 20px;
  color: var(--primary);
  margin-bottom: 0.5rem;
}
.card-text {
  color: #666;
  margin-bottom: 1rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.btn {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  background-color: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: 4px;
  border: none;
  cursor: pointer;
}
.detail-header {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}
.detail-img {
  width: 300px;
  max-width: 100%;
  height: auto;

  aspect-ratio: 3/4;
  background-color: var(--secondary);
}
.footer {
  background-color: var(--primary);
  color: #fff;
  text-align: center;
  padding: 2rem;
  margin-top: 3rem;
}