{
  "song_id": "05_God knows..._20260420",
  "prompt": "Genre: J-Rock / Anisong; BPM: 150; Key: G#m; Rhythm: Fast, driving rock beat, 16th-note hi-hats. Kick locks with guitar riffs. Frequent complex fills.; Instruments: Distorted lead guitar (fast solos), chugging rhythm guitars (power chords), punchy bass (melodic runs), aggressive acoustic drums, subtle background synth pads.; Vocals: Female. Clear, powerful high-range vocals with a bright, slightly nasal timbre. Strong vibrato on sustained notes. Urgent and emotional delivery.; Mood: Running full-tilt through a rainy, neon-lit city at night, chasing a silhouette just out of reach.; Production: High-fidelity digital clarity, wide stereo guitars. Centered, compressed vocals. Loud, polished rock mix.; Language: Japanese; Highlight: The sustained vocal note at the end of the pre-chorus, held over a brief instrumental pause before the drums launch the first chorus with explosive force.",
  "title": "硝子の牙",
  "lyrics": "[intro]\n(Chords: G#m - E - F# - B - G#m - E - C#m - F#)\n(Inst: Fast, technical distorted guitar riff establishes the main melodic theme. Full band enters with explosive energy. Double-time drums.)\n(Mix: Wide stereo field, drums and bass centered, guitars panned hard L/R.)\n(Transition: Drum fill into verse.)\n\n[verse]\n(Chords: G#m - E - F# - B - G#m - E - F# - G#m)\n(Vocal-Perf: Controlled and tense chest voice, mezzo-forte. Rhythmic and precise phrasing.)\n(Inst: Rhythm guitars play tight, palm-muted 16th-note power chords. Bass follows root notes with syncopation. Drums maintain a driving hi-hat pattern.)\n(Mix: Vocals sit cleanly on top of the dense instrumental bed.)\n舌の上で溶けた嘘の味がする\n制服のボタン 三つ目から数えた春\n教室の窓枠 手のひらで塞いで\n聞こえないふりをした 君の名前\n(Transition: Guitar holds a power chord, cymbal swell builds anticipation.)\n\n[pre-chorus]\n(Chords: C#m - G#m - E - F#)\n(Vocal-Perf: Melody ascends, building intensity towards the chorus. Voice becomes more open and emotional.)\n(Inst: Guitars switch to more open, ringing power chords. Bass plays a more melodic line.)\n足音消して近づいても\n影すら摑めない それでも\nbeyond the fading line\n(Transition: Brief full band stop on the last word, followed by an explosive drum fill that launches into the chorus.)\n\n[chorus]\n(Chords: G#m - E - B - F# - C#m - G#m - E - F#)\n(Vocal-Perf: Soaring, powerful belting in a higher register. Sustained notes with prominent vibrato. Forte.)\n(Inst: Guitars play full, open power chords. Lead guitar plays a counter-melody. Drums shift to heavy crash cymbal accents on the downbeats.)\n(Mix: Widens even further. Subtle synth pads enter, adding harmonic depth.)\n硝子の牙で世界を噛み砕け\n滲んだ視界の向こうに灯台がある\n転んだ膝の泥ごと立て\n泣くのは後でいい\n喉が枯れ果てるまで叫び続けるから\nmy voice 届けよ\n地の果てまで 消えるな...\n(Transition: Fast guitar solo lick over a sustained band chord, leading into the bridge.)\n\n[bridge]\n(Chords: C#m - G#m - E - F# - C#m - G#m - E - F#)\n(Vocal-Perf: Becomes slightly softer, more introspective, then builds back to full power.)\n(Inst: Dynamic drop. Guitars use a cleaner, arpeggiated texture at first, then reintroduce distortion to build back up.)\n雨粒が耳たぶを叩く夜に\n正しさより速さを選んだ\n置いてきた傘と約束と 濡れたままの記憶\nまだ手放せない\n(Transition: Massive drum fill and ascending vocal line create a powerful ramp into the final chorus.)\n\n[chorus]\n(Chords: G#m - E - B - F# - C#m - G#m - E - F#)\n(Vocal-Perf: Maximum emotional intensity. Ad-libbed harmonies and background vocals add layers.)\n(Inst: All instruments at full power. Lead guitar plays more aggressive fills and counter-melodies.)\n(Mix: The densest point of the song. Vocals pushed slightly higher with more reverb.)\nだから硝子の牙で世界を噛み砕け\n滲んだ視界の向こうに灯台がある\n転んだ膝の泥ごと立て\n泣くのは後でいい\n喉が枯れ果てるまで叫び続けるから\nmy voice 届けよ\n地の果てまで 消えるな...\n\n[outro]\n(Chords: G#m - E - F# - G#m)\n(Inst: Features the main guitar riff from the intro. Band plays a final syncopated hit together.)\n(Mix: Ends abruptly on a final chord with guitar feedback ringing out and fading.)",
  "cover_prompt": "生成一张无字音乐专辑封面。风格严格参照 20 世纪 Color Field Painting（色域绘画），如 Mark Rothko 晚期作品的色层叠压逻辑与 Helen Frankenthaler 的浸染法（soak-stain technique）。画面的核心色彩与情绪：冷钢蓝与暗紫灰在画面上半部分重压叠积，中段突然迸裂出一道不规则的暗琥珀色渗透带，像淬火时金属裂缝中涌出的余温——整体传递出一种绷紧到极限、即将爆裂前一秒的张力与肃杀感。\n\n技法要求：色彩之间的过渡必须模拟颜料在未上浆的粗纹棉布（raw cotton canvas）上自然渗透、晕开的效果，边界柔软但保留颜料浓度不均匀造成的自然深浅变化（pigment pooling）。画面需要呈现真实画布的编织肌理（woven canvas texture），局部可见稀薄处透出的底布纹路。整体色调偏低饱和、微微发灰（muted, desaturated palette），避免荧光感和数字渐变的均匀平滑。\n\n绝对禁止：任何文字/字母/拼音、人物或人物轮廓、具象物体、几何图案、锐利边缘、胶片颗粒滤镜、3D渲染质感。",
  "cover": {
    "template_id": 1,
    "template_name": "环境光晕流",
    "scene_description": "冷钢蓝与暗紫灰在画面上半部分重压叠积，中段突然迸裂出一道不规则的暗琥珀色渗透带，像淬火时金属裂缝中涌出的余温——整体传递出一种绷紧到极限、即将爆裂前一秒的张力与肃杀感。"
  }
}