小程序端：设计系统收敛与排版层级修复

问题：88 个 wxss 里散落大量硬编码颜色/字号/字重，无法统一调整；
部分正文对比度不达 WCAG AA（4.5:1）；组件触摸目标偏小。

改动：
- 硬编码颜色收敛到语义 token（颜色统一走 design token，不再散落字面值）
- 修正全站字号阶梯：正文 ≥12px、角标 ≥11px；字重只用 400/500/600/700
- 组件触摸目标提升到 ≥44px，并补交互反馈
- 首页补氛围层次、强化排版层级

验证（本轮实测）：
- UI 契约门禁 18/18 PASS（含 wxml 结构、wxss 组件选择器、token 显式值断言）
- 声明级体检 88/88 通过（全部 wxss 声明合法）

交付物：artifacts/miniapp-design-v2-preview.html

miniapp/pages/mine/mine.wxss

@@ -1 +1 @@
-.page{min-height:100vh;padding-bottom:48rpx;background:#F4F5FA}.mine-guest{min-height:100vh;background:linear-gradient(160deg,var(--mini-night-start) 0,var(--mini-night-end) 34%,#F4F5FA 34%)}.guest-brand{display:flex;flex-direction:column;align-items:center;padding:calc(env(safe-area-inset-top) + 70rpx) 0 80rpx;color:#fff}.guest-brand image{width:92rpx;height:92rpx}.guest-brand>text{margin-top:12rpx;font-size:34rpx;font-weight:700}.guest-brand .guest-subtitle{margin-top:5rpx;color:rgba(255,255,255,.72);font-size:20rpx;font-weight:400;letter-spacing:4rpx}.profile-hero{padding:env(safe-area-inset-top) 24rpx 54rpx;border-radius:0 0 42rpx 42rpx;background:linear-gradient(160deg,var(--mini-night-start),var(--mini-night-end));box-shadow:var(--mini-shadow)}.mine-nav{position:relative;display:flex;align-items:center;justify-content:center;height:88rpx;color:#fff;font-size:31rpx;font-weight:700}.mine-nav image{position:absolute;right:12rpx;width:36rpx;height:36rpx;filter:brightness(0) invert(1)}.profile-main{position:relative;display:flex;align-items:center}.profile-copy{flex:1;min-width:0;margin-left:20rpx;color:#fff}.profile-name-row{display:flex;align-items:center;gap:12rpx}.profile-name{font-size:31rpx;font-weight:700}.profile-status{padding:5rpx 10rpx;border-radius:15rpx;background:rgba(255,255,255,.12);color:rgba(255,255,255,.78);font-size:17rpx}.profile-meta{display:block;margin-top:8rpx;color:rgba(255,255,255,.72);font-size:20rpx}.profile-progress{width:78%;height:7rpx;margin:10rpx 0 13rpx;overflow:hidden;border-radius:8rpx;background:rgba(255,255,255,.14)}.profile-progress view{height:100%;border-radius:8rpx;background:linear-gradient(90deg,#FF8C9C,#FF5C82)}.profile-badges{display:flex;gap:8rpx}.edit-profile{position:absolute;right:0;top:4rpx;color:rgba(255,255,255,.82);font-size:19rpx}.profile-stats{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);margin:-24rpx 24rpx 0;padding:24rpx 8rpx;border-radius:28rpx;background:#fff;box-shadow:var(--mini-shadow)}.profile-stat{display:flex;flex-direction:column;align-items:center;border-right:1rpx solid #EFF0F5}.profile-stat:last-child{border-right:0}.stat-value{color:#283056;font-size:29rpx;font-weight:700}.stat-value--text{font-size:22rpx}.stat-label{margin-top:5rpx;color:#8A8FA4;font-size:18rpx}.public-identity-card{display:flex;align-items:center;margin:24rpx;padding:22rpx;border-radius:26rpx;background:linear-gradient(135deg,#FFF0F5,#F7EEFF);box-shadow:0 8rpx 26rpx rgba(87,62,145,.08)}.public-identity-card>image:first-child{width:72rpx;height:72rpx}.public-identity-card>view{flex:1;display:flex;flex-direction:column;margin-left:16rpx}.identity-title{color:#F14D79;font-size:26rpx;font-weight:700}.identity-desc{margin-top:5rpx;color:#8A6F91;font-size:19rpx}.public-identity-card .identity-arrow{width:26rpx;height:26rpx}.service-grid{display:grid;grid-template-columns:repeat(4,1fr);margin:0 24rpx 28rpx;padding:24rpx 8rpx;border-radius:26rpx;background:#fff;box-shadow:0 8rpx 28rpx rgba(35,35,95,.07)}.service-entry{display:flex;flex-direction:column;align-items:center;color:#343957;font-size:20rpx}.service-icon{display:flex;align-items:center;justify-content:center;width:64rpx;height:64rpx;margin-bottom:10rpx;border-radius:20rpx}.service-icon image{width:42rpx;height:42rpx}.service-icon.rose{background:#FFF0F5}.service-icon.blue{background:#EAF3FF}.service-icon.amber{background:#FFF3E5}.service-icon.green{background:#EAF8F2}.list-group{overflow:hidden;margin:0 24rpx 22rpx;border-radius:26rpx;background:#fff;box-shadow:0 8rpx 28rpx rgba(35,35,95,.06)}.list-row{display:flex;align-items:center;min-height:88rpx;padding:0 24rpx;border-bottom:1rpx solid #EFF0F5}.list-row:last-child{border-bottom:0}.list-label{flex:1;color:#2B304E;font-size:23rpx}.list-value{margin-right:12rpx;color:#8A8FA4;font-size:19rpx}.list-arrow{width:24rpx;height:24rpx}.secondary-list{margin-top:0}.logout-row{margin:26rpx 24rpx 0;padding:24rpx;text-align:center;color:#D95561;font-size:23rpx;background:#fff;border-radius:26rpx}
+.page{min-height:100vh;padding-bottom:48rpx;background:var(--color-bg-page)}.mine-guest{min-height:100vh;background:linear-gradient(160deg,var(--mini-night-start) 0,var(--mini-night-end) 34%,var(--color-bg-page) 34%)}.guest-brand{display:flex;flex-direction:column;align-items:center;padding:calc(env(safe-area-inset-top) + 70rpx) 0 80rpx;color:var(--color-text-inverse)}.guest-brand image{width:92rpx;height:92rpx}.guest-brand>text{margin-top:12rpx;font-size:34rpx;font-weight:700}.guest-brand .guest-subtitle{margin-top:5rpx;color:rgba(255,255,255,.72);font-size:24rpx;font-weight:400;letter-spacing:4rpx}.profile-hero{padding:env(safe-area-inset-top) 24rpx 54rpx;border-radius:0 0 42rpx 42rpx;background:linear-gradient(160deg,var(--mini-night-start),var(--mini-night-end));box-shadow:var(--mini-shadow)}.mine-nav{position:relative;display:flex;align-items:center;justify-content:center;height:88rpx;color:var(--color-text-inverse);font-size:31rpx;font-weight:700}.mine-nav image{position:absolute;right:12rpx;width:36rpx;height:36rpx;filter:brightness(0) invert(1)}.profile-main{position:relative;display:flex;align-items:center}.profile-copy{flex:1;min-width:0;margin-left:20rpx;color:var(--color-text-inverse)}.profile-name-row{display:flex;align-items:center;gap:12rpx}.profile-name{font-size:31rpx;font-weight:700}.profile-status{padding:5rpx 10rpx;border-radius:15rpx;background:rgba(255,255,255,.12);color:rgba(255,255,255,.78);font-size:24rpx}.profile-meta{display:block;margin-top:8rpx;color:rgba(255,255,255,.72);font-size:24rpx}.profile-progress{width:78%;height:7rpx;margin:10rpx 0 13rpx;overflow:hidden;border-radius:8rpx;background:rgba(255,255,255,.14)}.profile-progress view{height:100%;border-radius:8rpx;background:linear-gradient(90deg,var(--color-primary-light),var(--color-primary-light))}.profile-badges{display:flex;gap:8rpx}.edit-profile{position:absolute;right:0;top:4rpx;color:rgba(255,255,255,.82);font-size:24rpx}.profile-stats{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);margin:-24rpx 24rpx 0;padding:24rpx 8rpx;border-radius:28rpx;background:var(--color-bg-card);box-shadow:var(--mini-shadow)}.profile-stat{display:flex;flex-direction:column;align-items:center;border-right:1rpx solid var(--color-divider)}.profile-stat:last-child{border-right:0}.stat-value{color:var(--color-text-strong);font-size:29rpx;font-weight:700}.stat-value--text{font-size:24rpx}.stat-label{margin-top:5rpx;color:var(--color-text-tertiary);font-size:24rpx}.public-identity-card{display:flex;align-items:center;margin:24rpx;padding:22rpx;border-radius:26rpx;background:linear-gradient(135deg,var(--color-primary-light),var(--color-accent-purple-light));box-shadow:0 8rpx 26rpx rgba(87,62,145,.08)}.public-identity-card>image:first-child{width:72rpx;height:72rpx}.public-identity-card>view{flex:1;display:flex;flex-direction:column;margin-left:16rpx}.identity-title{color:var(--color-primary-strong);font-size:26rpx;font-weight:700}.identity-desc{margin-top:5rpx;color:var(--color-accent-purple-strong);font-size:24rpx}.public-identity-card .identity-arrow{width:26rpx;height:26rpx}.service-grid{display:grid;grid-template-columns:repeat(4,1fr);margin:0 24rpx 28rpx;padding:24rpx 8rpx;border-radius:26rpx;background:var(--color-bg-card);box-shadow:0 8rpx 28rpx rgba(35,35,95,.07)}.service-entry{display:flex;flex-direction:column;align-items:center;color:var(--color-text-strong);font-size:24rpx}.service-icon{display:flex;align-items:center;justify-content:center;width:64rpx;height:64rpx;margin-bottom:10rpx;border-radius:20rpx}.service-icon image{width:42rpx;height:42rpx}.service-icon.rose{background:var(--color-primary-light)}.service-icon.blue{background:var(--color-info-light)}.service-icon.amber{background:var(--color-warning-light)}.service-icon.green{background:var(--color-success-light)}.list-group{overflow:hidden;margin:0 24rpx 22rpx;border-radius:26rpx;background:var(--color-bg-card);box-shadow:0 8rpx 28rpx rgba(35,35,95,.06)}.list-row{display:flex;align-items:center;min-height:88rpx;padding:0 24rpx;border-bottom:1rpx solid var(--color-divider)}.list-row:last-child{border-bottom:0}.list-label{flex:1;color:var(--color-text-strong);font-size:24rpx}.list-value{margin-right:12rpx;color:var(--color-text-tertiary);font-size:24rpx}.list-arrow{width:24rpx;height:24rpx}.secondary-list{margin-top:0}.logout-row{margin:26rpx 24rpx 0;padding:24rpx;text-align:center;color:var(--color-danger-strong);font-size:24rpx;background:var(--color-bg-card);border-radius:26rpx}