删除不再使用的文件，包括开放 API 鉴权规范文档、数据库迁移脚本和旧版图标组件，优化项目结构和资源管理。更新小程序代码以支持代付功能，增加代付分享弹窗和支付逻辑，提升用户体验。

miniprogram/pages/read/read.wxss

@@ -600,6 +600,10 @@
   z-index: 1000;
 }
 
+.modal-overlay-center {
+  align-items: center;
+}
+
 .modal-content {
   width: 100%;
   max-width: 750rpx;
@@ -610,11 +614,25 @@
   animation: slideUp 0.3s ease;
 }
 
+.modal-content-center {
+  width: 640rpx;
+  max-width: calc(100vw - 80rpx);
+  border-radius: 32rpx;
+  padding: 40rpx;
+  padding-bottom: 40rpx;
+  animation: popIn 0.18s ease-out;
+}
+
 @keyframes slideUp {
   from { transform: translateY(100%); }
   to { transform: translateY(0); }
 }
 
+@keyframes popIn {
+  from { transform: scale(0.94); opacity: 0.6; }
+  to { transform: scale(1); opacity: 1; }
+}
+
 .modal-header {
   display: flex;
   align-items: center;
@@ -706,6 +724,117 @@
   font-weight: 600;
 }
 
+/* 阅读页内代付弹窗（v2：档位按钮 + 价格计算 + 支付后分享） */
+.gift-modal-v2 {
+  padding: 40rpx;
+}
+.gift-article-card {
+  padding: 28rpx;
+  background: rgba(255, 255, 255, 0.06);
+  border: 1rpx solid rgba(255, 255, 255, 0.08);
+  border-radius: 24rpx;
+  margin-bottom: 32rpx;
+}
+.gift-article-title {
+  font-size: 32rpx;
+  font-weight: 700;
+  color: #fff;
+  display: block;
+  line-height: 1.3;
+  margin-bottom: 10rpx;
+}
+.gift-article-desc {
+  font-size: 24rpx;
+  color: rgba(255, 255, 255, 0.55);
+  display: block;
+  line-height: 1.5;
+}
+.gift-spots-grid {
+  display: grid;
+  grid-template-columns: repeat(4, 1fr);
+  gap: 18rpx;
+  margin-bottom: 28rpx;
+}
+.gift-spot-btn {
+  text-align: center;
+  padding: 22rpx 0;
+  border-radius: 20rpx;
+  background: rgba(255, 255, 255, 0.06);
+  border: 1rpx solid rgba(255, 255, 255, 0.1);
+  color: rgba(255, 255, 255, 0.85);
+  font-weight: 600;
+  font-size: 28rpx;
+}
+.gift-spot-active {
+  border-color: rgba(0, 206, 209, 0.9);
+  color: #00CED1;
+  background: rgba(0, 206, 209, 0.12);
+}
+.gift-price-box {
+  padding: 26rpx;
+  border-radius: 24rpx;
+  background: rgba(0, 0, 0, 0.25);
+  border: 1rpx solid rgba(255, 255, 255, 0.08);
+  margin-bottom: 28rpx;
+  text-align: center;
+}
+.gift-price-label {
+  font-size: 22rpx;
+  color: rgba(255, 255, 255, 0.5);
+  display: block;
+  margin-bottom: 10rpx;
+}
+.gift-price-row {
+  display: flex;
+  align-items: baseline;
+  justify-content: center;
+  gap: 14rpx;
+}
+.gift-price-formula {
+  font-size: 24rpx;
+  color: rgba(0, 206, 209, 0.8);
+}
+.gift-price-total {
+  font-size: 44rpx;
+  font-weight: 800;
+  color: #00CED1;
+}
+.gift-pay-btn {
+  width: 100%;
+  border-radius: 999rpx;
+  background: #00CED1;
+  color: #000;
+  font-weight: 800;
+  font-size: 32rpx;
+  padding: 26rpx 0;
+}
+.gift-cancel-text {
+  text-align: center;
+  margin-top: 18rpx;
+  font-size: 26rpx;
+  color: rgba(255, 255, 255, 0.45);
+}
+.gift-paid-wrap {
+  padding-top: 8rpx;
+}
+.gift-paid-tip {
+  display: block;
+  font-size: 26rpx;
+  color: rgba(255, 255, 255, 0.7);
+  line-height: 1.6;
+  margin-bottom: 24rpx;
+}
+.gift-share-btn {
+  width: 100%;
+  border-radius: 999rpx;
+  background: rgba(0, 206, 209, 0.12);
+  border: 1rpx solid rgba(0, 206, 209, 0.45);
+  color: #00CED1;
+  font-weight: 800;
+  font-size: 32rpx;
+  padding: 26rpx 0;
+}
+
 .share-modal-desc {
   font-size: 28rpx;
   color: rgba(255, 255, 255, 0.6);