Android Health Blood Oxygen Monitor UI

An Android health monitoring app screen focused on blood oxygen (SpO2) tracking, rendered on a Pixel 7 mockup in obsidian black. Background: very dark charcoal (#101010) with a faint circular radial gradient in deep burgundy behind the central gauge. The primary UI element is a large circular gauge (200dp diameter) in the center of the screen: the arc track is a two-tone gradient from deep red to vivid red. The gauge needle points to 97, and the center of the gauge shows "97%" in 56sp white bold, sub-label "SpO2" in 16sp muted red. Below the gauge, a small status chip reads "Normal Range" with a soft green checkmark icon. Below that, a historical trend chart — a 7-day line chart showing SpO2 values between 94–99%, plotted as a smooth curve in deep red on a very dark background, x-axis labeled Mon–Sun in 12sp gray. Above the chart header: "7-Day Trend" in 14sp Inter Medium gray. Below the chart: two comparison stat chips — "Average 96.8%" and "Lowest 94%" — in dark oval badges. At the bottom, a rounded teal "Start Measurement" button. Color palette: near-black, deep red, vivid red accent, teal CTA, muted text.

一张以血氧（SpO2）追踪为核心的无品牌现代手机健康监测应用界面。手机为黑曜石黑无品牌样机，背景极深炭灰（#101010），中央计量表后方有深酒红色径向渐变光晕。核心 UI 元素为屏幕中央大型圆形计量表（200dp 直径）：弧形轨道为从深红到鲜红的双色渐变；指针指向 97，圆心显示「97%」56sp 白色粗体，副标签「当前血氧」16sp 柔红色。计量表下方绿色勾状态芯片「状态正常」。再下方 7 天趋势折线图（94-99% 范围，深红色平滑曲线，深色背景，横轴中文「周一」「周二」「周三」「周四」「周五」「周六」「周日」）。图表标题「七日趋势」14sp 现代无衬线字体 Medium 灰色。图表下方两个对比统计椭圆徽章：「平均 97%」和「最低 94%」。底部圆角青色按钮「查看详情」。配色：近黑、深红、鲜红强调、青色按钮、柔文字。SpO2 可作为医学缩写保留；不要真实手机品牌、英文按钮、英文图表标题、水印或乱码。