/* nav.css - 导航+面包屑+分页（全局加载） */

/* 顶部导航 */
.header {
  background-color: var(--primary);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
}

.logo h1 {
  font-size: 22px;
  color: var(--white);
  font-weight: 600;
  white-space: nowrap;
}

.logo a {
  color: var(--white);
  text-decoration: none;
}

.nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 0 18px;
  color: var(--white);
  font-size: 15px;
  font-weight: 500;
  line-height: 70px;
  transition: background-color 0.3s ease;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  background-color: rgba(255,255,255,0.1);
  color: var(--secondary);
}

/* 下拉菜单 */
.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--white);
  min-width: 180px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.15);
  border-radius: 0 0 4px 4px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s ease;
  z-index: 1001;
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: 12px 20px;
  color: var(--text);
  font-size: 14px;
  border-bottom: 1px solid #f0f0f0;
  transition: all 0.3s ease;
}

.dropdown-menu a:last-child {
  border-bottom: none;
}

.dropdown-menu a:hover {
  background-color: var(--light-bg);
  color: var(--primary);
  padding-left: 25px;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
  display: none;
  width: 30px;
  height: 24px;
  position: relative;
  cursor: pointer;
}

.mobile-menu-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--white);
  position: absolute;
  left: 0;
  transition: all 0.3s ease;
}

.mobile-menu-btn span:nth-child(1) { top: 0; }
.mobile-menu-btn span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.mobile-menu-btn span:nth-child(3) { bottom: 0; }

/* 面包屑导航 */
.breadcrumb {
  background-color: var(--light-bg);
  padding: 15px 0;
  border-bottom: 1px solid var(--border);
}

.breadcrumb-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.breadcrumb-item {
  font-size: 14px;
  color: var(--text-light);
}

.breadcrumb-item a {
  color: var(--text-light);
  transition: color 0.3s ease;
}

.breadcrumb-item a:hover {
  color: var(--primary);
}

.breadcrumb-separator {
  margin: 0 10px;
  color: var(--border);
}

.breadcrumb-item.active {
  color: var(--primary);
}

/* 分页 */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border-radius: 4px;
  font-size: 14px;
  color: var(--text);
  background-color: var(--white);
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}

.pagination a:hover {
  background-color: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.pagination .current {
  background-color: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.pagination .ellipsis {
  border: none;
  background: none;
  cursor: default;
}

/* 返回顶部 */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background-color: var(--primary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 999;
  font-size: 18px;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--secondary);
}

/* 响应式导航 */
@media (max-width: 992px) {
  .mobile-menu-btn {
    display: block;
  }
  
  .nav {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 80%;
    max-width: 300px;
    height: calc(100vh - 70px);
    background-color: var(--primary);
    transition: left 0.3s ease;
    overflow-y: auto;
  }
  
  .nav.active {
    left: 0;
  }
  
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: 20px 0;
  }
  
  .nav-link {
    line-height: 50px;
    padding: 0 25px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }
  
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    background-color: rgba(0,0,0,0.1);
    border-radius: 0;
    display: none;
  }
  
  .dropdown.active .dropdown-menu {
    display: block;
  }
  
  .dropdown-menu a {
    color: rgba(255,255,255,0.9);
    border-bottom: 1px solid rgba(255,255,255,0.05);
    padding-left: 40px;
  }
  
  .dropdown-menu a:hover {
    background-color: rgba(255,255,255,0.1);
    color: var(--secondary);
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 60px;
  }
  
  .logo h1 {
    font-size: 18px;
  }
  
  .nav {
    top: 60px;
    height: calc(100vh - 60px);
  }
  
  .breadcrumb {
    padding: 10px 0;
  }
  
  .breadcrumb-item {
    font-size: 13px;
  }
  
  .back-to-top {
    width: 38px;
    height: 38px;
    bottom: 20px;
    right: 20px;
    font-size: 16px;
  }
}