{
  "song_id": "01_恋人_20260512",
  "prompt": "Genre: Mandopop / Ballad; BPM: 140; Key: Eb Major; Rhythm: Laid-back pop-rock groove; kick on 1 & 3, snare on 2 & 4; clean 8th-note hats; on-the-grid; Instruments: Fingerpicked steel-string acoustic; clean electric bass; dry, tight drum kit; orchestral string section; high synth bell melody; Vocals: Male tenor; clean, slightly nasal timbre; gentle verse delivery; emotional, open chorus; light compression, clean reverb; Melody: Verse: narrow range, lands on tonic; Chorus: ascending arch, resolves down; Mood: Flipping through a photo album in a quiet room, dust motes dancing in a sunbeam.; Production: High-fidelity polish; vocal-centric mix; smooth compression; wide stereo strings; clean reverb.; Language: Mandarin; Highlight: The sudden entry of the full drum kit and bass on the downbeat of the first chorus, following the sparser, unresolved pre-chorus melody.",
  "title": "白痕",
  "lyrics": "[intro]\n(Hook-DNA: Rhythmic pattern: dotted-eighth + sixteenth + quarter, on beat 1; Pitch anchor: circles the 5th, resolves to tonic; Repetition: motif repeats twice, then varies)\n(Inst: Fingerpicked steel-string acoustic guitar; high-pitched synth bell melody with long delay)\n(Chords: Ebmaj7 - Abmaj7 - Ebmaj7 - Abmaj7)\n(Mix: High-fidelity, clean mix. Acoustic guitar is warm and present. Synth bell has a long reverb tail. Centered, intimate soundstage. Transparent master bus compression.)\n\n(Transition: Smooth fade-in of instruments.)\n[verse]\n(Melody-Contour: Narrow range, conversational rhythm; short phrases land on tonic and mediant.)\n(Vocal-Perf: Soft, breathy chest voice; mezzo-piano; minimal vibrato.)\n(Inst: Acoustic guitar continues; clean electric bass enters, playing root notes on downbeats.)\n(Chords: Ebmaj7 - Abmaj7 - Gm7 - Cm7 - Fm7 - Bb7)\n纸箱压在床板最深的地方\n我用手背拂开那层薄灰\n相册封皮还带着一股樟脑的香\n盒子早就空了不知从哪年\n第一张还没翻开 停了一会儿\n\n(Transition: Bass line becomes more melodic, subtle cymbal swell leads into pre-chorus.)\n[pre-chorus]\n(Melody-Contour: Stepwise ascending line builds tension; phrase ends unresolved on the 5th.)\n(Vocal-Perf: Intensity increases slightly; more sustained notes.)\n(Inst: Acoustic and bass continue; soft, muted kick drum enters, simple pulse.)\n(Chords: Abmaj7 - Gm7 - Cm7 - Fm7 - Abm6)\n他西装口袋里总别着那支钢笔\n从来没见他写过半个字\n那件深蓝的西装 熨得笔挺\n钢笔只是一个姿态 不是工具\n\n(Transition: Abm6 chord creates strong pull to chorus; vocal melody hangs unresolved, then full band enters on downbeat.)\n[chorus]\n(Hook-Recall: The ascending arch mirrors the intro's Hook-DNA motif resolved to open vowel.)\n(Melody-Contour: Wide ascending arch, peaks on high note; resolves with a descending stepwise line.)\n(Melody-Harmonic-Tension: Melody hits major 7th over root Eb chord for bittersweet tension; final phrase lands on 5th over the V chord, holding tension.)\n(Vocal-Perf: Full voice, mezzo-forte; open timbre with emotional strain; controlled vibrato.)\n(Inst: Full drum kit enters; lush orchestral strings provide sustained pads; acoustic guitar strums.)\n(Chords: Ebmaj7 - Abmaj7 - Gm7 - Cm7 - Fm7 - Bb7 - Ebmaj7)\n(Mix: Stereo field widens significantly with strings; vocal layered with subtle harmonies.)\n他也曾经年轻过 笑得那么敞开\n照片角落磨白的那道痕 比任何话都深\n他也曾经年轻过 站在我不知道的地方\n成为父亲之前 他是另一个人\n\n(Transition: Strings hold final chord; cymbal decays into the quieter bridge.)\n[bridge]\n(Melody-Contour: New syncopated melodic idea; phrases build in length and intensity.)\n(Melody-Harmonic-Tension: Melody dwells on the 2nd and 4th over minor chords; final phrase resolves strongly to the tonic, setting up the final chorus.)\n(Vocal-Perf: Narrative and dynamic; alternates between soft and strong phrases; backing vocals enter.)\n(Inst: Arrangement thins out then rebuilds; bass becomes more melodic; strings swell.)\n(Chords: Abmaj7 - Gm7 - Cm7 - Fm7 - Bb7 - Abmaj7 - Gm7 - Cm7 - Fm7 - Bb7)\n背面有个名字 圆珠笔压得很深\n像写了又想擦 字迹还留在那里\n我终于明白那支从不用的钢笔\n一直别在口袋是为了谁而挺立\n我们以为最熟悉的人\n住在我们来不及认识他的那些年里\n\n(Transition: Big drum fill and string swell leads directly into the final chorus.)\n[chorus]\n(Hook-Recall: The ascending arch mirrors the intro's Hook-DNA motif resolved to open vowel.)\n(Melody-Contour: Wide ascending arch, peaks on high note; resolves with a descending stepwise line.)\n(Melody-Harmonic-Tension: Melody hits major 7th over root Eb chord for bittersweet tension; final phrase lands on 5th over the V chord, holding tension.)\n(Vocal-Perf: Most powerful delivery; ad-libs and harmonies added; sustained high notes.)\n(Inst: All elements at full intensity; strings play active counter-melodies; drums are powerful.)\n(Chords: Ebmaj7 - Abmaj7 - Gm7 - Cm7 - Fm7 - Bb7 - Ebmaj7)\n(Mix: Widest and loudest point of the song.)\n他也曾经年轻过 笑得那么敞开\n照片角落磨白的那道痕 比任何话都深\n他也曾经年轻过 站在我不知道的地方\n成为父亲之前 他是另一个人\n\n(Transition: Music holds on the final chord, then fades.)\n[outro]\n(Inst: String section plays a final, mournful melody; acoustic guitar plays simple arpeggios; intro synth bell returns.)\n(Mix: All elements slowly fade out, leaving only reverb tails of strings and synth bell.)",
  "cover_prompt": "生成一张无字音乐专辑封面。风格参照日本「もの派」（Mono-ha）的物质感与李禹焕（Lee Ufan）绘画中「留白与一笔」的克制美学，结合湿拓画（Ebru / paper marbling）的有机纹理。画面核心：一个边缘自然晕散的浅褪色矩形轮廓，像一张被时光浸透的老相纸，处于从暖米黄到灰蓝的渐变手工纸背景中，矩形内部几乎空白，仅在一角有一道极细的白色划痕自然延伸，像指甲在纸面反复摩挲留下的痕迹。技法要求：几何图形的边缘必须是颜料在湿润纸面上自然扩散形成的（ink bleeding on wet paper），而非数字绘制的精准轮廓。背景需要呈现真实手工纸的纤维质感（visible paper fibers, deckled edges texture），可以带有轻微的水渍痕迹（watermark stains）和纸张泛黄的老化感。构图极度克制，大面积留白，主体偏离中心（off-center composition）。整体像一张被扫描的实体版画作品（scanned fine art print），而非数字生成图像。绝对禁止：任何文字/字母/拼音、人物或人物轮廓、复杂场景、风景照片感、3D渲染、塑料质感的光泽。",
  "cover": {
    "template_id": 2,
    "template_name": "几何光影艺术流",
    "scene_description": "一个边缘自然晕散的浅褪色矩形轮廓，像一张被时光浸透的老相纸，处于从暖米黄到灰蓝的渐变手工纸背景中，矩形内部几乎空白，仅在一角有一道极细的白色划痕自然延伸，像指甲在纸面反复摩挲留下的痕迹，整体传递出一种隐秘的久握与久等的重量"
  }
}