/* 背景基础设置 */
body {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", "Arial", sans-serif;
  background: linear-gradient(135deg, #101B2B, #1C2C44);
  height: 100vh;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  color: #fff;
}

/* 粒子背景图层 */
#particles-js {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: 1;
}

/* 登录框容器（匹配你原HTML的 login-container 类） */
.login-container {
  position: relative;
  z-index: 2;
  background: rgba(255, 255, 255, 0.05);
  padding: 40px 30px;
  border-radius: 16px;
  backdrop-filter: blur(10px);
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
  width: 320px;
  text-align: center;
}

/* 标题 */
.login-container h1 {
  font-size: 20px;
  font-weight: bold;
  margin-bottom: 24px;
  line-height: 1.4;
}

/* 输入框 */
.login-container input[type="text"],
.login-container input[type="password"] {
  width: 100%;
  padding: 12px;
  margin-bottom: 16px;
  border: none;
  border-radius: 8px;
  background: #ffffffcc;
  font-size: 15px;
  outline: none;
  transition: box-shadow 0.2s ease;
}

.login-container input:focus {
  box-shadow: 0 0 4px #2196f3;
}

/* 按钮 */
.login-container button {
  width: 100%;
  padding: 12px;
  background-color: #1469b6;
  border: none;
  border-radius: 8px;
  color: white;
  font-weight: bold;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.login-container button:hover {
  background-color: #0e4e86;
}

/* 底部小字链接 */
.footer {
  margin-top: 20px;
  font-size: 12px;
  color: #ccc;
}