/* 头部导航栏样式 */
.header {
  background-color: #fff;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: all 0.3s ease;
}

.header.scrolled {
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  background-color: rgba(255, 255, 255, 0.95);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 90px;
}

.header-top {
  margin-right: 12px;
  padding-top: 10px;
}

.header-top .nav-toggle {
  display: none;
}

.logo {
  width: 180px;
}

.nav {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.nav ul {
  display: flex;
}

.nav ul li {
  position: relative;
}

.nav ul li a {
  display: block;
  padding: 0 14px;
  height: 90px;
  line-height: 90px;
  font-size: 16px;
  color: var(--text-color);
  transition: all 0.3s;
  white-space: nowrap;
  cursor: pointer;
  letter-spacing: 1px;
}

.nav ul li.active a {
 color: var(--white-text) !important;
}

.nav ul li a:hover {
  color: var(--white-text);
  background-color: var(--primary-color);
  cursor: pointer;
}
.nav ul li.active{color: var(--white-text);
  background-color: var(--primary-color);}
.nav ul li.active:after {
  content: "";
  position: absolute;
  inset: 0;
  width: 100%;
  background-color: var(--primary-color);
  z-index: -1;
}

/* 二级菜单样式 */
.nav ul li.has-submenu {
  position: relative;
  min-width: max-content;
}

.nav ul li.has-submenu .submenu-toggle:after {
  content: "▼";
  font-size: 9px;
  margin-left: 3px;
  transition: transform 0.3s;
  display: inline-block;
  vertical-align: middle;
}

.nav ul li.has-submenu:hover .submenu-toggle:after,
.nav ul li.has-submenu.active .submenu-toggle:after {
  transform: rotate(180deg);
}

.nav ul li .submenu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 100%;
  width: max-content;
  background-color: #fff;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  display: none;
  flex-direction: column;
  z-index: 1001;
  overflow: visible;
}

.nav ul li .submenu:before {
  position: absolute;
  display: block;
  content: " ";
  left: 50%;
  transform: translateX(-50%);
  bottom: 100%;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-bottom: 4px solid;
  border-bottom-color: #ffffff;
  z-index: 1002;
}

/* 子菜单链接文字设置为黑色 */
.nav ul li.active .submenu li a {
    color: var(--text-color) !important;
}

.nav ul li.active .submenu li a:hover {
  color: var(--white-text) !important;
  background-color: var(--primary-color) !important;
  cursor: pointer;
}

/* 菜单图标 */
.menu-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  margin-right: 10px;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  transition: all 0.3s;
}

@media (min-width: 768px) {
  .nav ul li:hover .submenu {
    display: flex;
  }

  .nav ul li .submenu li a {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    transition: all 0.3s;
  }

  .nav ul li .submenu li a:hover {
    background-color: #c81e1e;
    color: #fff;
  }

  .nav ul li .submenu li a:hover .menu-icon {
    filter: brightness(0) invert(1);
  }
}

.nav ul li .submenu li {
  width: 100%;
}

.nav ul li .submenu li a {
  height: 40px;
  line-height: 40px;
  padding: 0 15px;
  text-align: center;
  font-size: 13px;
  white-space: nowrap;
}

/* 各类菜单图标 */
.icon-company {
  background-image: url("../img/common/icon-company.png");
}

.icon-idea {
  background-image: url("../img/common/icon-idea.png");
}

.icon-structure {
  background-image: url("../img/common/icon-structure.png");
}

.icon-honor {
  background-image: url("../img/common/icon-honor.png");
}

.icon-strength {
  background-image: url("../img/common/icon-strength.png");
}

.icon-gov {
  background-image: url("../img/common/icon-gov.png");
}

.icon-project {
  background-image: url("../img/common/icon-project.png");
}

.icon-global {
  background-image: url("../img/common/icon-global.png");
}

.icon-company-bid {
  background-image: url("../img/common/icon-company-bid.png");
}

.icon-service {
  background-image: url("../img/common/icon-service.png");
}

.icon-notice {
  background-image: url("../img/common/icon-notice.png");
}

.icon-bid {
  background-image: url("../img/common/icon-bid.png");
}

.icon-result {
  background-image: url("../img/common/icon-result.png");
}

.icon-other {
  background-image: url("../img/common/icon-other.png");
}

.icon-gov-perf {
  background-image: url("../img/common/icon-gov-perf.png");
}

.icon-edu {
  background-image: url("../img/common/icon-edu.png");
}

.icon-medical {
  background-image: url("../img/common/icon-medical.png");
}

.icon-construction {
  background-image: url("../img/common/icon-construction.png");
}

.icon-recommend {
  background-image: url("../img/common/icon-recommend.png");
}

.icon-monitor {
  background-image: url("../img/common/icon-monitor.png");
}

.contact-search {
  display: flex;
  align-items: center;
}

.search-box {
  display: flex;
  align-items: center;
  margin-right: 20px;
  border-radius: 20px;
  padding: 5px 10px;
}

.search-box button {
  cursor: pointer;
}

.search-box button img {
  width: 14px;
  height: 17px;
}

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

.telephone img {
  width: 20px;
  height: 20px;
  margin-right: 5px;
}

.telephone span {
  font-size: 16px;
  color: var(--primary-color);
  font-weight: bold;
}

/* 响应式样式 */
@media (max-width: 1200px) {
  .contact-search {
    display: none;
  }
}

@media (max-width: 992px) {
  .nav ul li a {
    padding: 0 8px;
    font-size: 12px;
  }
}

/* 移动端头部样式 */
@media (max-width: 767px) {
  .header {
    position: fixed;
    height: auto;
    padding: 10px 0;
    background-color: #fff;
    width: 100%;
  }
  
  .header .container {
    flex-direction: column;
    height: auto;
    padding: 0;
    width: 100%;
    max-width: 100%;
  }
  
  /* 移动端顶部布局 */
  .header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0 15px;
    margin-right: 0;
  }

  .header-top .nav-toggle {
    display: block;
  }
  
  .logo {
    width: 150px;
    margin: 5px 0;
  }
  
  /* 移动端导航按钮 */
  .nav-toggle {
    display: block;
    width: 24px;
    height: 24px;
    position: relative;
    cursor: pointer;
    background: none;
    border: none;
    z-index: 1100;
  }
  
  .nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    position: absolute;
    left: 0;
    transition: all 0.3s;
  }
  
  .nav-toggle span:nth-child(1) {
    top: 6px;
  }
  
  .nav-toggle span:nth-child(2) {
    top: 14px;
  }
  
  .nav-toggle span:nth-child(3) {
    top: 22px;
  }
  
  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg);
    top: 14px;
  }
  
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg);
    top: 14px;
  }
  
  /* 移动端导航菜单 */
  .nav {
    width: 100%;
    display: none;
    flex-direction: column;
  }
  
  .nav.active {
    display: flex;
  }
  
  .nav ul {
    flex-direction: column;
    width: 100%;
    padding: 10px 0;
    background-color: #fff;
  }
  
  .nav ul li {
    width: 100%;
  }
  
  .nav ul li a {
    height: 40px;
    line-height: 40px;
    padding: 0 15px;
    text-align: left;
    color: var(--text-color);
    width: 100%;
    display: block;
  }
  
  .nav ul li.active:after {
    display: none;
  }
  
  .nav ul li.active a {
    background-color: transparent;
    color: var(--text-color);
  }
  
  /* 移动端二级菜单 */
  .nav ul li.has-submenu .submenu-toggle {
    position: relative;
    width: 100%;
    display: block;
    color: var(--text-color);
  }

  .nav ul li.has-submenu .submenu-toggle:after {
    content: "▼";
    position: absolute;
    right: 15px;
    top: 0;
    height: 40px;
    line-height: 40px;
    font-size: 9px;
    transition: transform 0.3s;
    margin-left: 0;
    transform: none;
  }

  .nav ul li.has-submenu.active .submenu-toggle:after {
    transform: rotate(180deg);
  }
  
  /* 移动端禁用悬停显示 */
  .nav ul li:hover .submenu {
    display: none;
  }
  
  /* 移动端只有点击才显示子菜单 */
  .nav ul li.has-submenu.active .submenu {
    display: flex;
    width: 100%;
    transform: none;
    left: 0;
  }
  
  .nav ul li.active a {
    color: #fff !important;
  }

  /* 移动端禁用悬停高亮 */
  .nav ul li a:hover {
    color: var(--text-color);
    background-color: transparent;
  }
  
  .nav ul li .submenu {
    position: static;
    width: 100%;
    box-shadow: none;
    display: none;
    background-color: #f5f5f5;
    transform: none;
  }
  
  .nav ul li .submenu:before {
    display: none;
  }
  
  .nav ul li .submenu li {
    width: 100%;
  }
  
  .nav ul li .submenu li a {
    padding: 0 30px;
    font-size: 13px;
    text-align: center;
    background-color: transparent;
    width: 100%;
    color: var(--text-color);
  }
  
  /* 移动端禁用子菜单悬停高亮 */
  .nav ul li .submenu li a:hover {
    background-color: transparent;
    color: var(--text-color);
  }
  
  /* 移动端菜单图标样式 */
  .menu-icon {
    width: 18px;
    height: 18px;
    margin-right: 8px;
    display: inline-flex;
  }

  .contact-search {
    width: 100%;
    justify-content: center;
    padding: 10px 15px;
    border-top: 1px solid #eee;
    display: none;
  }
  
  .nav.active + .contact-search {
    display: flex;
  }
}