@charset 'uft-8';

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

/* 基础清除样式 */
a {
  /* 清除默认下划线 */
  text-decoration: none;
  /* 清除默认颜色 */
  color: inherit;
  /* 平滑过渡效果 */
  transition: all 0.3s ease;
  /* 更好的可访问性 */
  outline: none;
  cursor: pointer;
}

/* 移除访问后颜色变化 */
a:visited {
  color: inherit;
}

/* 悬停效果 */
a:hover {
  color: #fff;
}

/* 焦点状态（键盘导航） */
a:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
}

body {
  min-width: 1280px;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #2869a9, #3985ff, #376cf8);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
  color: white;
}

.container {
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
}

header {
  text-align: center;
  margin-bottom: 40px;
  padding: 30px;
  background: rgba(135, 212, 255, 0.1);
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

h1 {
  font-size: 2rem;
  margin-bottom: 10px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.subtitle {
  font-size: 1.2rem;
  opacity: 0.9;
  max-width: 800px;
  margin: 0 auto;
}

.flex-container {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 40px;
}

.flex-item {
  flex: 1 0 calc(25% - 20px); /* 每行5个项目，考虑间隙 */
  min-width: 250px; /* 最小宽度 */
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 15px;
  padding: 20px;
  transition: all 0.3s ease;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.flex-item.air {
  background: none;
  box-shadow: none;
  border: none;
}

.flex-item.air:hover {
  background: none;
  box-shadow: none;
  border: none;
}

.flex-item:hover {
  transform: translateY(-10px);
  background: rgba(255, 255, 255, 0.15);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.software-img {
  max-height: 160px;
  margin-bottom: 16px;
  text-align: center;
}

.software-img img {
  height: 100%;
}

.item-title {
  font-size: 1.04rem;
  font-weight: bold;
  margin-bottom: 10px;
  text-align: left;
}

.item-sub-title {
  font-size: 1.0rem;
  margin-bottom: 15px;
  text-align: left;
}


.item-content {
  display: flex;
  justify-content: space-around;
  font-size: 1rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.85);
}

.item-link {
  text-decoration: none;

}