```json
{
  "song_id": "02_잔소리_20260418",
  "prompt": "Genre: K-Pop / Ballad Duet; BPM: 112; Key: C# Major; Rhythm: Mid-tempo pop groove with a slight shuffle. Acoustic drums with a steady backbeat (snare on 2 & 4).; Instruments: Bright grand piano (chords/arpeggios), lush string orchestra (pads/melodies), clean electric bass, acoustic pop drum kit, subtle strummed acoustic guitar.; Vocals: Male and Female duet. Female: clear, youthful, sweet chest/head voice. Male: smooth, breathy baritone. Tight, clean harmonies.; Mood: Playfully bickering in a sun-drenched living room, one tidying while the other lounges on the sofa.; Production: High-fidelity, radio-ready polish. Wide, spacious mix with centered vocals and lush stereo strings.; Language: Korean; Highlight: The first pre-chorus harmony where the male and female vocals trade and then join on the phrase resolving their bickering before the chorus drops.",
  "title": "온도차",
  "lyrics": "[intro]\n(Chords: C#maj7 - G#/C - A#m7 - G#sus4 - G#)\n(Mix: Wide stereo field; Piano and strings centered)\n(Inst: Elegant piano melody introduces main theme, supported by swelling orchestral strings. Hook DNA established.)\n(Vocal-Perf: Instrumental)\n(Melody-Contour: Arched, lyrical theme)\n\n[verse]\n(Chords: C# - G# - A#m7 - F#)\n(Mix: Intimate, vocals forward; Piano and light percussion create a gentle bed.)\n(Inst: Piano-led with simple, clean acoustic guitar strums and a soft kick/hat pattern. Female vocal leads first half.)\n(Vocal-Perf: Female: light, conversational chest voice. Male: smooth, slightly breathy response. Clear diction.)\n(Melody-Rhythm: Flowing, speech-like)\n찬물 샤워하고 나서\n이불 반만 덮고 자더니\n감기 걸려 코 훌쩍이며 나한테 전화해\n(Transition: Male vocal enters smoothly, taking over the melody.)\n그러게 누가 뭐래\n따뜻하게 입으라 했잖아\n이번엔 내 말 좀 들었어야지\n\n[pre-chorus]\n(Chords: F# - G# - C# - A#m7 - F# - G#)\n(Mix: Width increases as strings enter, building tension.)\n(Inst: Strings re-enter with sustained notes, bass becomes more melodic, drums add light snare fills.)\n(Vocal-Perf: Call and response builds to a key moment of unison/harmony, a playful resolution.)\n(Melody-Dev: Melodic lift, leads directly into chorus.)\n걱정돼서 하는 말인 걸 왜 모르는 거야\n잔소리처럼 들려도 다 너 때문인 걸\n알잖아 알면서\n\n[chorus]\n(Chords: C# - G# - A#m7 - F#)\n(Mix: Full, cinematic width. Vocals sit powerfully in the center of the lush instrumentation.)\n(Inst: Full orchestra, driving drums with cymbal crashes, piano playing strong block chords. The hook is delivered with maximum emotional weight.)\n(Vocal-Perf: Duet in strong harmony and unison. Both voices in a powerful mezzo-forte.)\n(Highlight: The full texture hits, paying off the pre-chorus tension. Strings soar over the duet.)\n네가 추울까봐 내가 먼저 두꺼운 옷 챙기고\n네가 배고플까봐 밥 먹었냐고 또 물어보고\n온도차 온도차\n너는 늘 무심한데 나는 왜 이래\n가슴 한쪽이 서늘해지는 이 느낌\n네 체온 하나에 내가 흔들리는 이 마음\n온도차 온도차\n결국 내가 먼저 녹아\n\n[verse 2]\n(Chords: C# - G# - A#m7 - F#)\n(Mix: Pulls back slightly from chorus but retains more energy than first verse.)\n(Inst: Arrangement mirrors first verse, but strings hold subtle pads underneath. Call-and-response structure repeats.)\n(Vocal-Perf: Playful delivery continues. Female leads, Male responds with a warm, reassuring tone.)\n(Transition: A short string flourish leads into the bridge.)\n나만 설레는 건지도 몰라\n네 눈엔 그냥 옆집 사람\n같은 공간에 앉아 있어도 거리가 느껴져\n그러지 마\n눈치채고 싶지 않게 웃어줄게\n조금만 가까이 와\n\n[bridge]\n(Chords: F#maj7 - C#/F - G#sus4 - G# - A#m7)\n(Mix: Dynamic drop, intimate focus on vocals, followed by a dramatic swell.)\n(Inst: Instrumentation thins to just piano and strings. Harmony shifts, creating a moment of reflection before the climax.)\n(Vocal-Perf: Softer, more emotional delivery. Begins as a trade-off, culminating in a powerful, unified line.)\n(Melody-Contour: Ascending line builds to a peak.)\n손끝이 스칠 때마다 심장이 먼저 알아\n모른 척하기엔 이미 늦어버렸어\n이러다 나 혼자\n다 타버리고 타버리고\n재만 남을 것 같아\n\n[chorus]\n(Chords: C# - G# - A#m7 - F#)\n(Mix: The biggest and widest point of the song. Vocals are powerful and clear over the dense arrangement.)\n(Inst: All elements at full force. Strings are at their most expressive, drums are powerful and driving.)\n(Vocal-Perf: Climax of the song. Both singers deliver with full power and emotion, with subtle ad-libs.)\n(Melody-Dev: The core melody is the same, but the delivery and surrounding instrumentation elevate it.)\n네가 추울까봐 내가 먼저 두꺼운 옷 챙기고\n이 마음 들킬까봐 아무렇지 않은 척하고\n온도차 온도차\n이 간격을 어떻게 좁혀야 해\n\n[outro]\n(Chords: C#maj7 - G#/C - A#m7 - G# - C#)\n(Mix: Begins to fade, leaving the main piano and string theme.)\n(Inst: Instrumental reprise of the intro/main theme, slowing down slightly (ritardando) to a final resolution.)\n(Vocal-Perf: Instrumental)\n(Structure: Fade out on the final chord.)",
  "cover_prompt": "생成一张极简主义的几何光影艺术图片作为无字音乐专辑封面。画面的核心是：一个边缘柔和模糊的圆形，像一枚被薄雾包裹的暖橘色光晕，悬浮于从冷灰蓝到浅米白的水彩渐变背景中，圆形内侧隐约透出温暖的鹅黄，外侧向冷色晕散开去，形成"暖心冷边"的张力对比。画面必须展现出微妙的高级材质肌理，特别是类似水彩晕染（Watercolor texture）或粗糙艺术纸张的触感。整体构图极度克制、留白（Minimalistic composition），注重光与影的柔和交错（Light and shadow interplay）。强烈要求：画面必须保持极致的安宁与静谧（Calm and serene），除了基础的、柔焦的简单几何图形（如模糊的圆、半透明的方块或柔和的线条）外，绝对不要出现任何复杂的现实物体、风景或人物！画面必须是无字封面，绝对不要生成任何文字、拼音或英文字母！绝对不要生成人物轮廓。传达出一种充满诗意、呼吸感与冥想空间的视觉感受。",
  "cover": {
    "template_id": 2,
    "template_name": "几何光影艺术流",
    "scene_description": "一个边缘柔和模糊的圆形，像一枚被薄雾包裹的暖橘色光晕，悬浮于从冷灰蓝到浅米白的水彩渐变背景中，圆形内侧隐约透出温暖的鹅黄，外侧向冷色晕散开去，形成"暖心冷边"的张力对比，象征两人之间若即若离的温度差"
  }
}
```