/* 全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Microsoft YaHei", sans-serif;
}

body {
  background-color: #f5f5f5;
}

/* 首页图片样式 */
.img-container {
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.main-img {
  max-width: 100%;
  max-height: 100%;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* 后台样式 */
.admin-container {
  max-width: 600px;
  margin: 50px auto;
  padding: 30px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  color: #333;
  margin-bottom: 30px;
  font-size: 24px;
}

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
  color: #555;
  font-weight: 500;
}

input, select {
  width: 100%;
  padding: 10px 15px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 16px;
}

input:focus, select:focus {
  outline: none;
  border-color: #409eff;
  box-shadow: 0 0 0 2px rgba(64, 158, 255, 0.2);
}

.btn {
  width: 100%;
  padding: 12px;
  background: #409eff;
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.3s;
}

.btn:hover {
  background: #337ecc;
}

.alert {
  padding: 15px;
  border-radius: 4px;
  margin-bottom: 20px;
  text-align: center;
}

.alert-success {
  background: #f0f9eb;
  color: #67c23a;
}

.alert-error {
  background: #fef0f0;
  color: #f56c6c;
}

/* 响应式适配 */
@media (max-width: 768px) {
  .admin-container {
    margin: 20px;
    padding: 20px;
  }
  
  h1 {
    font-size: 20px;
  }
}