* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
ul li {
  list-style: none;
}
a {
  text-decoration: none;
}
#header {
  position: sticky;
  top: 0;
  z-index: 9;
}
#container {
  overflow-x: hidden;
  max-width: 1200px;
  margin: 1.875rem auto;
  min-height: 100vh;
  /* 栏目样式 */
  /* 主容器 */
  /* 标题区域 */
  /* 活动列表 */
  /* 活动卡片 */
  /* 弹窗遮罩 */
  /* 弹窗主体 */
  /* 弹窗标题 */
  /* 表单容器 */
  /* 表单行 */
  /* 输入框样式 */
  /* 错误提示 */
  /* 按钮 */
  /* 响应式调整 */
  /* 分页 */
  /* 报名表单 */
  /* 空状态 */
  /* 响应式调整 */
}
#container .column-section {
  padding: 0 16px;
  margin-bottom: 40px;
}
#container .column-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 30px;
  flex-direction: column;
}
#container .column-header h2 {
  color: #175292;
}
#container .column-header span {
  color: #858585;
  font-size: 14px;
  text-transform: uppercase;
}
#container .column-header .line {
  width: 50px;
  height: 4px;
  background-color: #175292;
  margin: 10px 0;
}
#container .activity-main {
  max-width: 1200px;
  margin: 0 auto;
}
#container .activity-header {
  padding: 0 16px;
  margin-bottom: 24px;
}
#container .activity-title {
  font-size: 24px;
  font-weight: 500;
  color: #333;
  margin-bottom: 8px;
}
#container .activity-subtitle {
  font-size: 14px;
  color: #666;
}
#container .activity-grid {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -10px;
}
#container .activity-col {
  width: 50%;
  padding: 0 10px;
  margin-bottom: 20px;
}
#container .activity-card {
  position: relative;
  height: 180px;
  padding: 16px 16px 16px 249px;
  background: white;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s;
}
#container .activity-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 16px 0 rgba(0, 0, 0, 0.15);
}
#container .activity-image {
  position: absolute;
  width: 213px;
  height: 147px;
  left: 16px;
  top: 16px;
  border-radius: 8px;
  box-shadow: 0 0 6px 0 rgba(0, 0, 0, 0.3);
  object-fit: cover;
}
#container .modal-mask {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
#container .modal-container {
  background-color: white;
  border-radius: 4px;
  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
  padding: 20px;
  max-width: 90%;
  width: 800px;
  max-height: 65vh;
  overflow-y: auto;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
#container .modal-title {
  font-size: 18px;
  font-weight: bold;
  margin-bottom: 20px;
  color: #333;
}
#container .apply-form-container {
  margin-bottom: 20px;
}
#container .form-row {
  margin-bottom: 20px;
  display: flex;
  align-items: center;
}
#container .form-label {
  width: 100px;
  text-align: right;
  padding-right: 12px;
  font-size: 14px;
  color: #606266;
}
#container .form-control {
  flex: 1;
}
#container .el-input {
  position: relative;
  font-size: 14px;
  display: inline-block;
  width: 100%;
}
#container .el-input__inner {
  -webkit-appearance: none;
  background-color: #fff;
  background-image: none;
  border-radius: 4px;
  border: 1px solid #dcdfe6;
  box-sizing: border-box;
  color: #606266;
  display: inline-block;
  font-size: inherit;
  height: 40px;
  line-height: 40px;
  outline: none;
  padding: 0 15px;
  transition: border-color 0.2s cubic-bezier(0.645, 0.045, 0.355, 1);
  width: 100%;
}
#container .el-input__inner:focus {
  border-color: #409eff;
}
#container .error-message {
  color: #f56c6c;
  font-size: 12px;
  line-height: 1;
  padding-top: 4px;
  position: absolute;
}
#container .el-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  line-height: 1;
  height: 40px;
  white-space: nowrap;
  cursor: pointer;
  background: #fff;
  border: 1px solid #dcdfe6;
  color: #606266;
  text-align: center;
  box-sizing: border-box;
  outline: none;
  margin: 0;
  transition: all 0.1s;
  font-weight: 500;
  padding: 12px 20px;
  font-size: 14px;
  border-radius: 4px;
}
#container .el-button--primary {
  color: #fff;
  background-color: #409eff;
  border-color: #409eff;
}
#container .el-button--primary:hover {
  background: #66b1ff;
  border-color: #66b1ff;
  color: #fff;
}
@media (max-width: 768px) {
  #container .modal-container {
    width: 90%;
    padding: 15px;
  }
  #container .select-all {
    width: 100%;
  }
  #container .form-row {
    flex-direction: column;
    align-items: flex-start;
  }
  #container .form-label {
    width: 100%;
    text-align: left;
    margin-bottom: 8px;
  }
}
#container .activity-name {
  font-weight: 600;
  color: #175292;
  margin: 7px 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  min-height: 2.4em;
  line-height: 1.2;
}
#container .activity-details {
  list-style: none;
  padding: 0;
  margin: 0;
}
#container .activity-detail {
  font-size: 12px;
  font-weight: 300;
  color: #666;
  margin-bottom: 5px;
  line-height: 1.4;
}
#container .activity-pagination {
  padding: 16px 0;
  text-align: center;
}
#container .activity-form {
  background-color: white;
  padding: 44px 40px;
  margin-top: 30px;
  border-radius: 8px;
}
#container .activity-form h2 {
  color: #175292;
  text-align: center;
}
#container .activity-form .line {
  width: 50px;
  height: 4px;
  background-color: #175292;
  margin-bottom: 30px;
  margin: 10px auto;
}
#container .all-group {
  display: flex;
  flex-wrap: wrap;
}
#container .form-title {
  font-size: 20px;
  font-weight: 500;
  margin-bottom: 30px;
  text-align: center;
}
#container .form-group {
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  width: 30%;
}
#container .form-label {
  width: 120px;
  text-align: right;
  padding-right: 20px;
  font-size: 14px;
  color: #606266;
}
#container .form-control {
  flex: 1;
  max-width: 200px;
}
#container .form-submit {
  text-align: center;
  margin-top: 30px;
}
#container .activity-empty {
  padding: 40px 0;
  text-align: center;
  color: #999;
}
@media (max-width: 768px) {
  #container .activity-main {
    padding: 16px 15px;
  }
  #container .activity-col {
    width: 100%;
  }
  #container .activity-card {
    padding-left: 170px;
  }
  #container .activity-name {
    font-size: 14px;
  }
  #container .activity-detail {
    font-size: 12px;
  }
  #container .activity-image {
    width: 140px;
    height: 140px;
  }
  #container .activity-form {
    padding: 30px 20px;
  }
  #container .form-group {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
  }
  #container .form-label {
    width: 100%;
    text-align: left;
    padding-right: 0;
    margin-bottom: 8px;
  }
  #container .form-control {
    max-width: 100%;
    width: 100%;
  }
}
@media (max-width: 68.75rem) {
  footer {
    transition: 0.3s;
    display: none;
  }
}