/* 导航栏 */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background-color: var(--bg-color);
  z-index: 1000;
}
.nav-container {
  max-width: 100%;
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--nav-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 100; /* 要比移动端下拉菜单大，因为要展示阴影 */
  box-shadow: var(--shadow);
}
/* 左侧样式 */
.nav-left {
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav-logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: inherit;
}
.nav-logo {
  width: 28px;
  height: 28px;
  object-fit: contain;
  background-color: var(--bg-color);
}
.nav-company-name {
  font-weight: 800;
  font-size: 18px;
  line-height: 40px;
  color: var(--primary-color);
  margin-left: 8px;
}
/* 右侧样式 */
.nav-right {
  display: flex;
  align-items: center;
  gap: 60px;
}

/* 导航菜单项 */
.nav-menu {
  display: flex;
  gap: 60px;
  list-style: none;
}

.menu-item {
  position: relative;
}

.menu-button {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  font-weight: 500;
  font-size: 14px;
  line-height: 22px;
  transition: var(--transition);
}

.menu-button:hover {
  color: var(--primary-color);
}
.menu-button a:hover {
  color: var(--primary-color);
}
.menu-button:hover .menu-button-icon {
  fill: var(--primary-color);
}


.menu-button a {
  font-weight: 500;
  font-size: 14px;
  line-height: 22px;
  color: var(--text-color);
}

.menu-item .menu-button-active a {
  color: var(--primary-color);
}
.menu-item .menu-button-active span {
  color: var(--primary-color);
}
.menu-item .menu-button-active .menu-button-icon {
  fill: var(--primary-color);
}

.menu-button-icon {
  vertical-align: middle;
  transition: var(--transition);
}

.menu-item:hover .menu-button-icon {
  transform: rotate(180deg);
}

/* .menu-item.active .submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
} */

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

/* 子菜单 */
.submenu {
  position: absolute;
  top: calc(100% + 8px); /* 按钮下方8px */;
  left: -50px;
  width: 180px;
  background-color: var(--bg-color);
  border: 1px solid #e5e7eb; /* 边框 */
  border-radius: 8px;
  box-shadow: var(--shadow);
  /* box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08); */
  padding: 10px 0;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  z-index: 10;
}

/* 小三角样式（伪元素实现） */
.submenu::before {
  content: "";
  position: absolute;
  top: -8px; /* 三角顶部对齐弹出层顶部 */
  left: 80px; /* 三角水平位置，可根据需要调整 */
  width: 0;
  height: 0;
  /* 绘制向上的小三角 */
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 8px solid #fff; /* 白色三角覆盖边框 */
  z-index: 1;
}

/* 三角边框（可选，让三角有边框效果） */
.submenu::after {
  content: "";
  position: absolute;
  top: -9px; /* 比白色三角高1px，显示边框 */
  left: 80px;
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 8px solid #e5e7eb; /* 边框颜色 */
  z-index: 0;
}

.submenu-item {
  padding: 10px 20px;
  transition: var(--transition);
}

.submenu-item:hover {
  background-color: #f3f4f6;
}

.submenu-link {
  font-weight: 400;
  font-size: 16px;
  line-height: 24px;
  color: var(--text-color);
  text-decoration: none;
  display: block;
  width: 100%;
}

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

/* 咨询按钮 */
.consult-button {
  background-color: var(--primary-color);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.consult-button a {
  color: white;
  border-radius: 6px;
  font-weight: 500;
  font-size: 14px;
  line-height: 24px;
  padding: 6px 22px;
}

.consult-button:hover {
  /* background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(37, 99, 235, 0.2); */
}

/* 移动端菜单切换按钮 */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 25px;
  cursor: pointer;
  font-weight: bold;
}

/* 移动端菜单 */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-color);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  padding-top: var(--nav-height);
  display: none;
  flex-direction: column;
  z-index: 99;
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu-item {
  font-weight: 400;
  font-size: 14px;
  line-height: 22px;
  /* border-bottom: 1px solid #e5e7eb; 不用下划线*/
}

.mobile-menu-button {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0 20px;
  font: inherit;
}

.mobile-menu-button div {
  display: block;
  width: 100%;
  text-align: left;
  padding: 16px 0;
  transition: var(--transition);
}
/* a标签单独设置 */
.mobile-menu-button a {
  color: var(--text-color);
  text-decoration: none;
  display: block;
  width: 100%;
  text-align: left;
  padding: 16px 0;
  transition: var(--transition);
}

.mobile-menu-button:hover {
  color: var(--primary-color);
}
.mobile-menu-button:hover a {
  color: var(--primary-color);
}

.mobile-submenu {
  display: none;
  list-style: none;
  margin-top: 8px;
}

.mobile-submenu.active {
  display: block;
}

.mobile-submenu-item {
  padding: 12px 40px;
  background-color: var(--bg-color-mobile-menu);
}
.mobile-submenu-item:hover {
  background-color: var(--bg-color-mobile-menu-hover);
}

.mobile-submenu-link {
  font-weight: 400;
  font-size: 14px;
  line-height: 22px;
  color: var(--text-color);
  text-decoration: none;
  display: block;
  transition: var(--transition);
}

.mobile-submenu-link:hover {
  color: var(--primary-color);
}
.mobile-menu-consult-button {
  position: absolute;
  bottom: 32px;
  width: 100%;
  text-align: center;
}
.mobile-menu-consult-button button {
  background-color: var(--primary-color);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.mobile-menu-consult-button button a {
  color: white;
  font-weight: 500;
  font-size: 20px;
  display: block;
  padding: 10px 30px;
}

/* -------------------------- 媒体查询：断点切换 -------------------------- */
@media (min-width: 1201px) {
  /* 菜单和咨询按钮展示 */
  .nav-menu {
    display: flex;
  }
  .consult-button {
    display: block;
  }
  .mobile-menu-toggle {
    display: none;
  }
  /* 右侧组件间的间距 */
  .nav-right {
    gap: 60px;
  }
}

@media (max-width: 1200px) {
  /* 菜单和咨询按钮展示 */
  .nav-menu {
    display: none;
  }
  .consult-button {
    display: none;
  }
  .mobile-menu-toggle {
    display: block;
  }
  /* 右侧组件间的间距 */
  .nav-right {
    gap: 26px;
  }
}