/* 头部和底部样式 */

/* 头部样式 */
.site-header {
  background-color: #F5F8FC;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  /* 不使用flex布局，改用内联块布局 */
  display: inline-block;
  vertical-align: middle;
}

.logo a {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  overflow: hidden;
  background-color: #fff;
  box-shadow: 0 2px 6px rgba(42, 93, 170, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-circle img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 2px;
}

.logo span {
  margin-left: 10px;
  font-size: 18px;
  font-weight: bold;
  color: #2A5DAA;
}

.main-nav {
  flex: 1;
  margin: 0 40px;
}

.nav-list {
  display: flex;
  justify-content: center;
  gap: 32px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-item {
  margin: 0;
}

.nav-link {
  color: #666666;
  font-size: 16px;
  transition: color 0.3s;
  padding: 8px 0;
  position: relative;
  text-decoration: none;
}

.nav-link:hover,
.nav-link.active {
  color: #2A5DAA;
}

.nav-link.active:after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: #2A5DAA;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 24px;
}

.search-box {
  position: relative;
}

.search-box input {
  width: 240px;
  height: 36px;
  padding: 0 40px 0 16px;
  border: 1px solid #DDDDDD;
  border-radius: 18px;
  font-size: 14px;
  transition: border-color 0.3s;
}

.search-box input:focus {
  border-color: #2A5DAA;
  outline: none;
}

.search-btn {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #999999;
  font-size: 16px;
  cursor: pointer;
}

.user-menu {
  position: relative;
  display: inline-block;
  padding-bottom: 10px;
}

.user-avatar {
  display: block;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.2s ease;
  position: relative;
  z-index: 1;
}

.user-avatar:hover {
  transform: scale(1.1);
}

.user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 200px;
  background: #FFFFFF;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  padding: 15px 0 8px;
  margin-top: -10px;
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.175);
  z-index: 1001;
  pointer-events: none;
}

.user-menu:hover .dropdown-menu,
.user-menu:focus-within .dropdown-menu,
.dropdown-menu:focus-within {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.dropdown-item {
  display: block;
  padding: 10px 16px;
  color: #555;
  transition: all 0.2s;
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
}

.dropdown-item:hover,
.dropdown-item:focus {
  background-color: #F5F8FC;
  color: #2A5DAA;
  outline: none;
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item:active {
  background-color: #E0E9F5;
}

/* 移动设备优化 */
@media (hover: none) {
  .user-menu {
    outline: none;
  }

  .dropdown-menu {
    margin-top: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  }

  .user-menu:focus .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }
}

/* 底部样式 */
.site-footer {
  background-color: #F5F8FC;
  padding: 48px 0 24px;
  margin-top: 48px;
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.05);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  margin-bottom: 32px;
}

.footer-logo {
  flex-shrink: 0;
}

.footer-logo img {
  height: 48px;
  margin-bottom: 16px;
}

.footer-logo p {
  color: var(--text-secondary);
  font-size: 14px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  flex: 1;
}

.link-group h3 {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.link-group ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.link-group li {
  margin-bottom: 12px;
}

.link-group a {
  color: var(--text-secondary);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.3s;
}

.link-group a:hover {
  color: var(--primary-color);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid #EEEEEE;
  text-align: center;
}

.copyright {
  color: var(--text-secondary);
  font-size: 14px;
}

/* 响应式调整 */
@media screen and (max-width: 992px) {
  .footer-top {
    flex-direction: column;
    gap: 32px;
  }

  .footer-logo {
    text-align: center;
  }

  .footer-links {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }
}

@media screen and (max-width: 768px) {
  .site-footer {
    padding: 32px 0 16px;
  }

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media screen and (max-width: 480px) {
  .footer-links {
    grid-template-columns: 1fr;
    gap: 24px;
    text-align: center;
  }

  .link-group {
    padding-bottom: 16px;
    border-bottom: 1px solid #EEEEEE;
  }

  .link-group:last-child {
    border-bottom: none;
  }
}

@media screen and (max-width: 768px) {
  .header-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  
  .main-nav {
    width: 100%;
    margin: 0;
  }
  
  .nav-list {
    flex-wrap: wrap;
    gap: 16px;
  }
  
  .header-actions {
    width: 100%;
    justify-content: space-between;
  }
  
  .search-box input {
    width: 180px;
  }
}