Sleep Tips 9-Grid Social Media Poster

A 3:4 vertical 9-grid poster layout (3 columns × 3 rows) designed as a social media graphic, featuring distinct thin divider borders separating each card. Aesthetic: Warm, healing, minimalist Korean/Instagram lifestyle style in a soothing color palette of [cream white, soft oatmeal, light beige, and warm caramel] with deep espresso brown typography. Each of the 9 cards has balanced margins and centered content. Card 1 (Cover): Bold main title: "让你倒头就睡的8个 tips", subtitle: "失眠党、熬夜党一定要收藏", surrounded by cute minimalist illustrations of a plush pillow, crescent moon, and silk sleep eye mask. Card 2: Title: "1. 睡前1小时别玩手机", body text: "蓝光会让大脑更清醒，越刷越睡不着。", small illustration of a smartphone and sleepy moon. Card 3: Title: "2. 睡前把灯光调暗", body text: "暖光环境能帮助身体进入“准备睡觉”的状态。", illustration of a bedside lamp glowing warm yellow light. Card 4: Title: "3. 房间温度别太高", body text: "稍微凉一点，更容易快速入睡。", illustration of a cozy duvet and gentle room thermometer. Card 5: Title: "4. 晚上别喝浓茶咖啡", body text: "咖啡因会延迟困意，让你躺很久还睡不着。", illustration of a coffee mug and teacup with a subtle restriction sign. Card 6: Title: "5. 睡前洗个热水澡", body text: "能让身体放松下来，入睡速度更快。", illustration of gentle bathroom steam and a fluffy towel. Card 7: Title: "6. 脑子停不下来就写下来", body text: "把烦心事和待办清单写下，大脑会更容易放松。", illustration of an open journal, pen, and tiny desk lamp. Card 8: Title: "7. 固定上床时间", body text: "每天差不多时间睡，生物钟会越来越稳定。", illustration of a minimal bedside clock and crescent moon. Card 9: Title: "8. 试试深呼吸放松法", body text: "吸气4秒，停4秒，呼气6秒，慢慢就有困意了。", bottom note: "收藏这组，今晚试试看", illustration of rhythmic breathing wave lines, stars, and a serene face with closed eyes. Clean editorial composition, perfectly legible Chinese typography, neat grid divisions.