Human Sleep Cycle Stages Diagram

A dark-mode scientific infographic illustrating the human sleep cycle across an 8-hour night on a deep midnight navy background. The main visual is a wavy line chart representing sleep depth over time, with the y-axis labeled "Sleep Depth" (Awake at top, REM, Light, Deep at bottom) and the x-axis showing 8 hours. The waveform dips deep in the first two cycles (dominantly deep sleep) and becomes shallower and REM-heavier toward morning, accurately reflecting sleep architecture. Color-coded bands fill beneath the waveform: navy for Awake, electric blue for REM, soft violet for Light Sleep, and deep indigo for Deep Sleep. Cycle brackets above the waveform label Cycle 1 through Cycle 5. A right-side panel lists what happens in each stage: muscle repair (Deep), memory consolidation (REM), heart rate drop (Light). Typography is clean white on dark. Subtle star-pattern texture in the background. Pill-shaped legend at the bottom.

一张深色模式科学信息图，在深午夜蓝背景上展示人类8小时睡眠周期。主视觉为一条波浪折线图，y轴标注睡眠深度（从上至下：清醒、REM、浅睡、深睡），x轴为8小时。波形在前两个周期深度下沉（以深睡为主），越接近清晨越浅且REM占比增加，准确反映睡眠结构。波形下方填充色带：海军蓝（清醒）、电光蓝（REM）、柔紫（浅睡）、深靛蓝（深睡）。波形上方支架标注周期1至5。右侧面板列出各阶段发生的事：肌肉修复（深睡）、记忆巩固（REM）、心率下降（浅睡）。白色文字于深色背景，背景有细微星点纹理，底部为胶囊形图例。