feat(h5): apply second customer UI feedback and homepage refinements

h5/index.html

@@ -42,7 +42,7 @@
 <section class="screen" id="s-splash">
   <div class="splash-bg"></div>
   <button class="account-status account-status-home" data-action="switch-login" aria-label="切换登录方式"><span data-auth-status></span><small>切换 ›</small></button>
-  <p class="splash-slogan">ONE ME,<br>FROM THE INSIDE OUT<br>以我为始 自有表现</p>
+  <p class="splash-slogan"><span class="splash-slogan-en">ONE ME,<br>FROM THE INSIDE OUT</span><br><span class="splash-slogan-zh">以我为始 自有表现</span></p>
   <div class="splash-bottom">
     <div class="brand-row">
       <img src="assets/img/ui-20261009/brand-logo.png" alt="1'me" class="brand-logo">
@@ -107,7 +107,7 @@
 <section class="screen" id="s-cam">
   <div class="cam-bg" id="cam-bg"></div>
   <p class="cam-step" id="cam-step">1/3<br>请正对屏幕</p>
-  <!-- 取景蒙版:SVG mask 镂空(框外 85% 黑,对齐 Figma 图层不透明度) + 轮廓线框;data-step 切换三种轮廓
+  <!-- 取景蒙版:SVG mask 镂空(框外 85% 黑)，无外轮廓描边；data-step 切换三种轮廓
        轮廓由 Figma 拍照示意图(design/assets/images/*-拍照示意.png,alpha 镂空区)逐像素描摹生成,坐标为 Figma 375×812 整帧;viewBox 只取 y 86–812(帧顶 86px 是微信导航栏,不属于 H5 视口)
        0=正脸(含耳部) 1=左脸出镜(用户头向自己右侧转,镜像预览中耳在画面左、鼻朝画面右) 2=右脸出镜(头向自己左侧转,耳在画面右、鼻朝画面左)
        data-step 取 CAM_STEPS[].mask(拍摄顺序 正→右→左,对齐 Figma) -->