实战案例：用AI提示词制作冰岛极光露营旅行短片，从黑沙滩瀑布到帐篷灯光与极光延时

你是一位国家地理风格的旅行纪录片导演。北境冰岛90秒短片：

1. 场景序列：
   - Reynisfjara黑沙滩：玄武岩柱+黑色火山砂+白色浪涌
   - Skogafoss瀑布：水雾中双彩虹
   - Diamond Beach钻石冰沙滩：冰块像钻石散落
   - 冰川徒步：蓝冰裂隙
   - 夜晚营地：橙黄色帐篷灯光+绿色极光带在天空流动

2. 镜头语法：
   - 风光大景：无人机缓慢前推或横移，速度要慢（每分钟画面位移不超过画面宽度1/3）
   - 极光：必须延时摄影质感，光带像帘幕摆动且有内部亮度流动
   - 雪的质感：暗部必须是蓝调阴影（blue-toned shadows），不是纯白

3. 避坑：极光像塑料布、雪过曝纯白、瀑布断流、冰块像玻璃碴、人物比例错误

[镜头1：黑沙滩 0-15秒]
Cinematic aerial shot gliding low over Reynisfjara black sand beach in Iceland, hexagonal basalt columns rising on the left, powerful Atlantic white waves crashing onto jet-black volcanic sand, overcast moody sky with cold blue-grey tones, fine sea spray suspended in air, slow forward drone push, documentary grade, 4K, --motion 1 --duration 8s
[Negative] tropical blue water, palm trees, golden sand, oversaturated, fast camera

[镜头2：瀑布彩虹 15-30秒]
Wide shot of massive Skogafoss waterfall cascading down steep cliff, thick mist at the base catching sunlight to form a faint double rainbow, lush green moss on rocks, tiny silhouette of a hiker at bottom for scale, static camera with subtle zoom in, 4K, --motion 1 --duration 8s
[Negative] waterfall drying up, frozen solid, cartoon water, rainbow over-saturated

[镜头3：钻石冰沙滩 30-45秒]
Low angle close tracking across Diamond Beach Iceland, large chunks of glacial ice scattered on black sand like giant diamonds, translucent ice glowing deep blue and white internally as overcast light passes through, gentle surf washing around ice chunks, cold desaturated palette, shallow depth of field, 4K, --motion 1 --duration 8s
[Negative] ice looking like broken glass bottles, sharp fake shards, warm sunlight, tropical beach

[镜头4：蓝冰裂隙 45-58秒]
Handheld POV shot walking through blue glacier crevasse, walls of compacted ancient ice glowing electric blue in narrow cracks, faint snow particles drifting, explorer's breath visible in cold air, narrow vertical framing emphasizing depth, natural camera bob, 4K, 7s
[Negative] ice caves looking like cartoon crystal, purple ice, smooth plastic texture

[镜头5：极光延时 58-80秒]
Stunning timelapse shot of vivid green aurora borealis curtains dancing and rippling across clear Icelandic night sky, stars sharply visible, milky way band faintly present, illuminated orange dome tent glowing warmly in snowy foreground valley, soft internal brightness flowing within the aurora ribbons like silk, reflection subtly visible on frozen lake, 4K timelapse, --motion 2 --duration 10s
[Negative] flat green smudge, plastic sheet sky, aurora static, green clouds, light pollution, tent overexposed

[质感约束]
极光必须有三层：深绿主体+上缘紫红镶边+内部亮度流动；雪面暗部偏蓝不纯白；帐篷暖光与极光冷绿形成冷暖对比

1. 合成方案：人物在棚内绿幕前拍摄穿北境羽绒服的背影，以15%透明度羽化边缘合成进极光镜头，人物占画面高度不超过1/8（剪影感）
2. 节奏：前60秒纯风光+环境音，58秒极光起音乐（北欧风格弦乐+环境电子），帐篷出现时加入第一声人声（轻笑、拉链声）
3. 调色：全片套冷调LUT（色温4200K），唯帐篷灯光区局部暖色（色温3200K蒙版）
4. 结尾字幕：「北境·世界尽头也有光」竖排小字，左下角停留5秒
5. 交付：横版16:9（B站/视频号）+竖版9:16（小红书，极光镜头改为上下扩展重构图，不用简单裁切）