/* 全局样式重置 */
html {
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
  color: #333;
}

/* 容器 */
.container {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: url('images/landing_bg.png');
  background-repeat: no-repeat;
  background-size: 100% 100%;
  background-position: top left;
  position: relative;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

.title {
  position: absolute;
  font-size: 80px;
  color: #fff;
  top: 40%;
  left: 6%;
}

/* 背景图片容器 */
.background-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.background-image img {
  width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
  margin: 0 auto;
}

/* 背景图片 */
.background-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.background-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: top left;
}

/* 导航栏 */
.navbar {
  padding: 0 50px;
  position: absolute;
  right: 0;
  top: 50px;
  z-index: 10;
}

/* 导航栏 */
.navbar {
  padding: 0 200px 0 50px;
  position: absolute;
  right: 0;
  top: 70px;
}

.logo img {
  height: 50px;
  vertical-align: middle;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 30px;
}

.nav-item {
  position: relative;
  border-bottom: 2px solid #ffd700;
}

.nav-link {
  color: #fff;
  text-decoration: none;
  font-size: 20px;
  font-weight: 500;
  padding: 10px 15px;
  border-radius: 5px;
  transition: all 0.3s ease;
  display: inline-block;
}

.nav-icon {
  width: 60px;
  height: 60px;
  object-fit: contain;
  vertical-align: middle;
  margin-right: 8px;
  animation: breathe 2s ease-in-out infinite;
}

/* 呼吸动画效果 */
@keyframes breathe {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.1);
  }
}

/* .nav-link:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #ffd700;
} */

/* 下拉菜单 - 改为默认显示 */
.dropdown-menu {
  position: absolute;
  top: 100%;
  right: -60px;
  /* background: rgba(255, 255, 255, 1);
  backdrop-filter: blur(10px); */
  /* border-radius: 8px; */
  /* box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2); */
  display: flex;
  gap: 30px;
  padding: 20px;
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  z-index: 1000;
  /* min-width: 800px; */
  /* height: 500px; */
}

/* 移除show类的样式，因为默认已经显示 */
.dropdown-menu.show {
  /* 保持与默认样式一致 */
}

.dropdown-column {
  flex: 1;
  min-width: 200px;
  padding-right: 20px;
  position: relative;
}

/* 在下拉菜单项之间添加分割线 */
.dropdown-column:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background-color: #e0e0e0;
}

.dropdown-column h3 {
  color: #333;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 15px;
  padding-bottom: 8px;
  border-bottom: 2px solid #ffd700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px;
  color: #fff;
  text-decoration: none;
  border-radius: 5px;
  transition: all 0.3s ease;
  margin-bottom: 5px;
  font-size: 16px;
}

.dropdown-item:hover {
  background: rgba(0, 0, 0, 0.05);
  color: #fff;
  transform: translateX(5px);
}

.dropdown-item img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  border-radius: 4px;

}

/* 主内容区 */
.main-content {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 50px;
}

.content-wrapper {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  padding: 60px 80px;
  border-radius: 15px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  max-width: 800px;
}

.content-wrapper h1 {
  font-size: 48px;
  color: #333;
  margin-bottom: 20px;
  font-weight: 700;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.content-wrapper p {
  font-size: 18px;
  color: #666;
  line-height: 1.8;
}

/* 页脚 */
.footer {
  font-size: 14px;
  position: absolute;
  bottom: 20px;
  left: 50%;
  /* 水平居中定位 */
  transform: translateX(-50%);
  /* 水平居中偏移 */
  text-align: center;
  width: 100%;
  /* 确保宽度足够 */
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .dropdown-menu {
    min-width: 600px;
    flex-direction: column;
    gap: 20px;
  }

  .content-wrapper h1 {
    font-size: 36px;
  }
}

@media (max-width: 768px) {
  .navbar {
    padding: 0 20px;
    flex-direction: column;
    height: auto;
    padding: 20px;
  }

  .nav-menu {
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
    width: 100%;
    border-bottom: 1px solid #edf2fa;
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    display: block;
    width: 100%;
    text-align: center;
  }

  .dropdown-menu {
    position: static;
    min-width: 100%;
    flex-direction: column;
    box-shadow: none;
    background: rgba(255, 255, 255, 1);
    /* 保持白色背景 */
    color: #333;
    /* 使用深色文本 */
  }

  /* 
  .dropdown-column h3 {
    color: #333;
    /* 使用深色标题 */
  border-bottom-color: #e0e0e0;
  /* 使用浅色分割线 */
}

*/

/* 在移动端移除列之间的垂直分割线，改为使用水平间距 */
.dropdown-column:not(:last-child)::after {
  display: none;
}

.dropdown-column {
  margin-bottom: 20px;
  padding-right: 0;
}



.dropdown-item:hover {
  background: rgba(0, 0, 0, 0.05);
  /* 使用浅色背景高亮 */
}

.content-wrapper {
  padding: 40px 20px;
  margin: 20px;
}

.content-wrapper h1 {
  font-size: 28px;
}

.content-wrapper p {
  font-size: 16px;
}
}