{
  "song_id": "",
  "prompt": "Genre: Mandopop / R&B Ballad; BPM: 68; Key: A minor; Chords: i-VI-III-VII (Am-F-C-G); Rhythm: Slow, spacious half-time R&B groove. Kick on 1, layered clap/snare on 3. Sparse, crisp 16th-note hi-hat patterns with occasional trap-style rolls.; Instruments: Emotional grand piano playing chords, lush atmospheric synth pads, deep sub-bass, electronic drum kit, epic synth strings swelling in the chorus.; Vocals: Male tenor, breathy and emotional, with R&B-style melodic runs. Processed with heavy reverb and subtle delay for a spacious, intimate feel.; Mood: Heartbroken, longing, reflective, epic.; Production: Modern, clean, wide stereo mix. Large, reverb-filled space. Dynamic contrast between sparse verses and powerful, layered choruses. Vocals are front and center.; Structure: Intro, Verse, Pre-Chorus, Chorus, Verse, Pre-Chorus, Chorus, Bridge, Chorus, Outro; Language: Mandarin; Highlight: The stark dynamic contrast between the epic, string-laden R&B chorus and the sparse, intimate piano/vocal sections.",
  "title": "困城",
  "lyrics": "[intro]\n(Structure: 4 bars)\n(Inst: Sparse piano melody, spacious reverb, ambient synth pad swells.)\n(Chords: Am - F - C - G)\n(Mix: Centered piano, wide pads, establishing a melancholic space.)\n(Sound-Design: Faint vinyl crackle underneath for intimacy.)\n\n[verse]\n(Structure: 8 bars)\n(Chords: Am - F - C - G)\n(Inst: Piano continues, deep sub-bass enters on downbeats, a single finger snap on beat 3.)\n(Vocal-Perf: Soft, breathy, close-mic'd, gentle R&B phrasing.)\n(Melody-Contour: Mostly descending, conversational.)\n(Mix: Vocals front and center, very dry with a touch of reverb.)\n车窗外霓虹坠落成海\n我沿着你走过的路 不知该往哪开\n电台突然放起那年的歌 整个人僵住发呆\n以为结了痂的伤口被旋律撕开 灌满尘埃\n\n(Transition: Hi-hats fade in with a simple 8th-note pattern.)\n\n[pre-chorus]\n(Structure: 8 bars)\n(Chords: F - G - Am - C)\n(Inst: Full drum kit enters with a half-time groove. Synth strings begin to swell quietly in the background.)\n(Vocal-Perf: Intensity increases slightly, building anticipation, holding notes longer.)\n(Melody-Contour: Ascending, leading into the chorus.)\n(Mix: Stereo field widens, vocal reverb increases.)\n这座城的每一条路都写着从前\n你待过的咖啡馆 灯光还像那年\n我踩了油门 想逃到没有你的地平线\n可红灯一亮 又把我拦在原点\n就让我在你留下的迷宫里 再绕一圈\n\n(Transition: Cymbal swell and a subtle bass drop.)\n\n[chorus]\n(Structure: 8 bars)\n(Chords: Am - F - C - G)\n(Inst: Epic and full. Prominent piano chords, powerful drums with trap-like hi-hat rolls, lush strings, layered pads, deep sub-bass.)\n(Vocal-Perf: Powerful, belted lead vocal, with wide-panned harmonies on key phrases.)\n(Melody-Rhythm: More sustained notes, anthemic feel.)\n(Mix: Huge, wide mix. Strings and pads fill the space. Vocals sit on top with large reverb.)\n这座城要我怎么绕才到终点\n每条路的尽头都是你 让我怎么选\n关掉车灯 让夜色铺天盖地蔓延\n如果忘了你 是最后的底线\n我情愿困在这夜色里面\n永远绕不完这一圈\n\n(Transition: Strings and most drums cut out, leaving piano and a simple kick/snap pattern.)\n\n[verse]\n(Structure: 8 bars)\n(Chords: Am - F - C - G)\n(Inst: Energy drops. Piano and bass are main focus. Minimalist drum pattern.)\n(Vocal-Perf: Returns to a more narrative, rhythmic delivery. More intricate phrasing.)\n(Melody-Dev: More syncopated and conversational than verse 1.)\n(Mix: Becomes intimate and centered again.)\n副驾座上还残留着你的味道和体温\n后视镜倒映那年秋天 你靠着车窗浅睡的嘴唇\n你说过左转是大海 右转能逃离这座城\n我选了直行 可每条路都通向你留下的伤痕\n\n[pre-chorus]\n(Structure: 4 bars)\n(Chords: F - G - Am - G)\n(Inst: Drums and strings swell back in, building energy faster than the first pre-chorus.)\n(Vocal-Perf: Emotionally charged, sense of desperation.)\n(Mix: Rapidly expands to full width.)\n你说好不松手的 凭什么断了弦\n拥抱的余温还烫在锁骨上面\n那片说好要一起走过的海岸线\n如今仪表盘的数字又转了一年\n再也没有从前\n\n(Transition: Drum fill into the chorus.)\n\n[chorus]\n(Structure: 8 bars)\n(Chords: Am - F - C - G)\n(Inst: Full power again. Strings are even more prominent. Piano plays more forcefully.)\n(Vocal-Perf: Peak emotional intensity, ad-libs in the background.)\n(Mix: Maximum width and depth. Vocals soar above the dense instrumentation.)\n这座城要我怎么绕才到终点\n每条路的尽头都是你 让我怎么选\n关掉车灯 让夜色铺天盖地蔓延\n如果忘了你 是最后的底线\n我情愿困在这夜色里面\n\n(Transition: Sudden stop. All instruments cut except for a filtered synth pad and bass.)\n\n[bridge]\n(Structure: 12 bars)\n(Chords: Dm - Am - C - G)\n(Inst: Starts with a low-pass filtered drum loop and bass. Builds by adding rhythmic piano stabs, then full strings swell back in for the second half.)\n(Vocal-Perf: First half is rhythmic, almost spoken-word. Second half becomes melodic, soaring, and desperate.)\n(Melody-Contour: Starts low and rhythmic, climbs to a high, emotional peak.)\n(Mix: Starts narrow and filtered, then opens up to a full, dramatic soundscape.)\n我承认我输了 输给这条路的空旷与疲倦\n每个路口三秒的犹豫 都被你占满了画面\n我能做的不过是绕着这座城\n一圈 一圈\n忘记是最远最远的那个出口 可我到不了终点\n我回不来\n也走不散\n油箱快见底\n车速坠入深渊\n没有哪个方向\n能通往从前\n副驾空荡荡的位置在笑我多可怜\n\n(Transition: Massive cymbal swell and reverb tail lead into the final chorus.)\n\n[chorus]\n(Structure: 8 bars)\n(Chords: Am - F - C - G)\n(Inst: The most powerful section. Double-time hi-hats, pounding kick, epic strings and pads. Counter-melody from a synth lead.)\n(Vocal-Perf: Full-on belting, layered with multiple harmonies and emotional ad-libs.)\n(Mix: Overwhelmingly powerful and dense, pushing the limits.)\n这座城要我怎么绕才到终点\n每条路的尽头都是你 让我怎么选\n关掉车灯 让夜色铺天盖地蔓延\n如果忘了你 是最后的底线\n我情愿困在这夜色里面\n\n[outro]\n(Structure: 4 bars)\n(Chords: F - G - Am)\n(Inst: All instruments cut except a single, soft piano playing arpeggiated chords with heavy reverb.)\n(Vocal-Perf: A single vocal line, sung softly, breathy, and distant. Fades out with the piano.)\n(Mix: Abrupt shift from maximum density to maximum sparseness. Fades to silence.)\n(Sound-Design: The sound of a tape stop effect on the final piano chord.)\n永远绕不完这一圈",
  "cover": {
    "template_id": 1,
    "template_name": "复古空旷风景流",
    "scene_description": "一片无边无际的灰蓝色雾海，浓雾层层叠叠地堆积在低矮的地平线上方，远处有一条极细的、正在缓慢闭合的暗橘色光缝，仿佛是天地之间最后一道即将消失的出口。前景是一小片被雾气浸透的枯黄草地，带着深秋凌晨的冷凝水珠。整个画面笼罩在一种无法挣脱的、令人窒息的静止感中。",
    "cover_prompt": "生成一张拍立得（Polaroid）风格的无字版音乐专辑封面。画面描绘的是：一片无边无际的灰蓝色雾海，浓雾层层叠叠地堆积在低矮的地平线上方，远处有一条极细的、正在缓慢闭合的暗橘色光缝，仿佛是天地之间最后一道即将消失的出口。前景是一小片被雾气浸透的枯黄草地，带着深秋凌晨的冷凝水珠。整个画面笼罩在一种无法挣脱的、令人窒息的静止感中。整体画面必须呈现真实拍立得相片的质感：略微过曝的柔和光线、轻微偏色的复古色调、自然的暗角和柔焦边缘、细腻的胶片颗粒感。色彩是褪色、怀旧的暖色调，仿佛一张被遗忘在抽屉里多年的即时成像照片。强烈要求：画面必须是纯粹的风景，绝对不要出现任何人物、人影、手或脸！绝对不要生成任何文字、字母、歌名或水印！保持空灵、孤独和冥想的氛围。",
    "selection_reason": "歌曲核心情绪是深夜困在回忆之城中无法逃脱的窒息与孤独感，带有强烈的longing和reflective基调。模板一的复古空旷风景最能表达这种被困在广袤虚空中、出口正在消失的绝望静谧感，与R&B Ballad的spacious混音风格也高度契合。"
  }
}