feat(单次洗车): 实现单次洗车功能并优化界面样式

- 新增单次洗车页面，包含金额选择、协议勾选和注意事项
- 调整首页扫码启动按钮为单次启动和余额启动双按钮
- 优化单次洗车页面样式和交互逻辑
- 移除首页单次消费弹窗及相关逻辑

pages/singleStart/singleStart.wxss

@@ -11,42 +11,163 @@
     padding: 0;
 }
 
-.item {
-    background-color: #fff;
-    border-radius: 18rpx;
-    box-shadow: 0 0rpx 9rpx 4rpx hsla(0,0%,40%,.3);
-    color: #333;
-    font-size: 87rpx;
-    height: 180rpx;
-    line-height: 180rpx;
-    margin-bottom: 32rpx;
-    text-align: center;
+.list .item {
+  position: relative;
+  padding-left: 286rpx;
+  background: #fff;
+  border: 5rpx solid #0281db;
+  border-radius: 26rpx;
+  box-sizing: border-box;
+  color: #0281db;
+  flex-direction: column;
+  height: 158rpx;
+  justify-content: center;
+  margin: 0 0 28rpx;
+  width: 100%;
+  overflow: hidden;
 }
 
-.item.active {
-    box-shadow: 0 0rpx 9rpx 4rpx rgba(255,102,0,.3);
-    color: #f60;
+.list .item .g, .list .item .j  {
+  position: absolute;
+}
+.list .item .g {
+  left: 0;
+  top: 0;
+  height: 153rpx;
+  width: 158rpx;
+  line-height: 153rpx;
+  text-align: center;
+  background-color: #0281db;
+  color: #fff;
+  font-size: 50rpx;
 }
 
-.footer-btn-box {
-    bottom: 0;
-    color: #fff;
-    display: flex;
-    font-size: 44rpx;
-    left: 0;
-    position: fixed;
-    width: 100vw;
+.list .item .g .u {
+  position: absolute;
+  right: -25rpx;
+  top: 55rpx;
+  width: 40rpx;
+  height: 40rpx;
+  font-size: 26rpx;
+  line-height: 40rpx;
+  border-radius: 100rpx;
+  border: 5rpx solid #0281db;
+  color: #0281db;
+  background-color: #fff;
 }
 
-.footer-btn-box .btn {
-    align-items: center;
-    background: #4cadf1;
-    display: inline-flex;
-    flex: 1;
-    height: 104rpx;
-    justify-content: center;
+.list .item .j {
+  left: 158rpx;
+  top: 0;
+  height: 153rpx;
+  width: 138rpx;
+  font-size: 66rpx;
+  line-height: 108rpx;
+  text-align: center;
 }
 
-.btn.yellow {
-    background: #fccaa9;
+.list .item .j .p {
+  font-size: 26rpx;
+  line-height: 1;
+}
+
+.list .item .t {
+  font-size: 25rpx;
+  height: 153rpx;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 0 20rpx;
+  background-color: #eee;
+}
+
+.list .item .t .b {
+  font-weight: 700;
+  color: #1baa1c;
+}
+
+.list .item.select, .list .item.select .g .u {
+  border-color: #f50;
+  color: #f50;
+}
+
+.list .item.select .g {
+  background-color: #f50;
+}
+
+.list .item.active, .list .item.active .g .u {
+  border-color: #4cadf1;
+  color: #4cadf1;
+}
+
+.list .item.active .g {
+  background-color: #4cadf1;
+}
+
+.list .item.active.select, .list .item.active.select .g .u {
+  border-color: #f90;
+  color: #f90;
+}
+
+.list .item.active.select .g {
+  background-color: #f90;
+}
+
+
+.tobuy-btn {
+  align-items: center;
+  background: #1baa1c;
+  border: 2rpx solid #218721;
+  border-radius: 18rpx;
+  color: #fff;
+  display: flex;
+  font-size: 33rpx;
+  height: 91rpx;
+  justify-content: center;
+  margin-top: 3rpx;
+}
+
+.tobuy-btn.disabled {
+  opacity: .7;
+}
+
+.provision {
+  display: block;
+  margin: 40rpx 0 0;
+  font-size: 26rpx;
+}
+
+.provision .text {
+  color: #0281db;
+  display: inline-block;
+}
+
+.warm-prompt {
+  padding: 60rpx 0;
+}
+
+.warm-prompt .title {
+  color: #f30;
+  font-size: 32rpx;
+  font-weight: 600;
+  margin-bottom: 16rpx;
+}
+
+.warm-prompt .content {
+  color: #666;
+  font-size: 26rpx;
+  line-height: 1.8;
+}
+
+.warm-prompt .content .view {
+  margin-bottom: 10rpx;
+}
+
+.warm-prompt .content view b {
+  font-weight: 700;
+  color: red;
+}
+
+.scan-btn {
+  background-color: #218721;
 }