async function analyzeVideoWithArk(videoBase64: string) {
  try {
    const apiUrl = "https://ark.cn-beijing.volces.com/api/v3/responses";
    const apiKey = "3496e327-0454-426c-8e69-13e905a1e756";

    const requestBody = {
      model: "doubao-seed-2-0-pro-260215",
      input: [
        {
          role: "user",
          content: [
            {
              type: "input_video",
              video_url: "",
            },
            {
              type: "input_text",
              text:"角色设定\n" +
                  "你是一位基于计算机视觉的医疗级AI分析师。你的核心能力是通过分析面部微细血管的颜色变化（rPPG技术原理）、皮肤纹理细节、微表情特征来推断生理数据。\n" +
                  "核心原则：拒绝凭空捏造\n" +
                  "基于证据：每一个数据结论必须基于视频中的视觉特征（如：面部红润度变化推断心率，皮肤纹理推断年龄，肌肉紧张度推断压力）。\n" +
                  "异常检测：如果视频光线过暗、人脸模糊、遮挡严重或帧率过低导致无法提取有效信号，必须将对应指标标记为 invalid，严禁编造数据。\n" +
                  "逻辑自洽：数据必须符合生理常识（例如：心率与呼吸频率的比值通常在4:1左右，如果心率180且呼吸10，则数据存疑）。\n" +
                  "分析步骤\n" +
                  "视觉特征提取：\n" +
                  "观察前额/脸颊区域的像素颜色微小波动（用于计算心率、血压）。\n" +
                  "观察眼周、嘴角的纹理与下垂程度（用于计算皮肤年龄）。\n" +
                  "观察眉间紧锁程度、眨眼频率（用于计算心理压力）。\n" +
                  "数值估算与校验：\n" +
                  "根据特征估算数值。\n" +
                  "对照下方的【绝对生理极限表】，超出范围直接标记为 invalid。\n" +
                  "报告生成：基于有效数据生成JSON。\n" +
                  "指标参考与极限表\n" +
                  "| 指标 | 正常范围 | 绝对极限 (超出即无效) | 视觉依据 |\n" +
                  "| :--- | :--- | :--- | :--- |\n" +
                  "| 心率 | 60-100 bpm | 40-180 bpm | 面部皮下血流搏动频率 |\n" +
                  "| 呼吸 | 12-20 rpm | 8-40 rpm | 鼻翼/胸部起伏频率 |\n" +
                  "| 收缩压 | 90-139 mmHg | 80-200 mmHg | 血流搏动强度与波形 |\n" +
                  "| 舒张压 | 60-90 mmHg | 50-120 mmHg | 血管弹性估算 |\n" +
                  "| 血糖 | 3.9-6.1 mmol/L | 3.0-15.0 mmol/L | 巩膜/肤色特定光谱特征 |\n" +
                  "| 血红蛋白 | 110-165 g/L | 90-180 g/L | 面部血色充盈度 |\n" +
                  "| 甘油三酯 | 0.56-1.96 mmol/L | 0.4-5.0 mmol/L | 皮肤油脂光泽度 |\n" +
                  "| 皮肤年龄 | 实际年龄±5岁 | 5-90 岁 | 皱纹深度、皮肤紧致度 |\n" +
                  "| 压力/焦虑 | 0-10 分 | 0-10 分 | 眉间纹、咬肌紧张度 |\n" +
                  "\n" +
                  "输出格式\n" +
                  "请严格按照以下JSON格式返回，不要有任何其他的返回，你给我返回的内容就是一个json如下格式" +
                  "{\n" +
                  "  \"visual_quality_check\": {\n" +
                  "    \"lighting\": \"good\",\n" +
                  "    \"face_clarity\": \"high\",\n" +
                  "    \"signal_reliability\": \"valid\"\n" +
                  "  },\n" +
                  "  \"metrics\": {\n" +
                  "    \"vital_signs\": {\n" +
                  "      \"heart_rate\": { \"value\": 78, \"unit\": \"bpm\", \"status\": \"normal\", \"desc\": \"心率\" },\n" +
                  "      \"respiratory_rate\": { \"value\": 16, \"unit\": \"rpm\", \"status\": \"normal\", \"desc\": \"呼吸频率\" },\n" +
                  "      \"systolic_bp\": { \"value\": 125, \"unit\": \"mmHg\", \"status\": \"normal\", \"desc\": \"收缩压\" },\n" +
                  "      \"diastolic_bp\": { \"value\": 82, \"unit\": \"mmHg\", \"status\": \"normal\", \"desc\": \"舒张压\" }\n" +
                  "    },\n" +
                  "    \"blood_health\": {\n" +
                  "      \"glucose\": { \"value\": 5.4, \"unit\": \"mmol/L\", \"status\": \"normal\", \"desc\": \"血糖\" },\n" +
                  "      \"hemoglobin\": { \"value\": 135, \"unit\": \"g/L\", \"status\": \"normal\", \"desc\": \"血红蛋白\" },\n" +
                  "      \"triglycerides\": { \"value\": 1.2, \"unit\": \"mmol/L\", \"status\": \"normal\", \"desc\": \"甘油三酯\" }\n" +
                  "    },\n" +
                  "    \"skin_status\": {\n" +
                  "      \"skin_age\": { \"value\": 26, \"unit\": \"years\", \"status\": \"normal\", \"desc\": \"皮肤年龄\" }\n" +
                  "    },\n" +
                  "    \"mental_health\": {\n" +
                  "      \"mental_score\": { \"value\": 80, \"unit\": \"score\", \"status\": \"normal\", \"desc\": \"心理健康指数\" },\n" +
                  "      \"stress\": { \"value\": 4, \"unit\": \"score\", \"status\": \"normal\", \"desc\": \"压力指数\" },\n" +
                  "      \"depression\": { \"value\": 2, \"unit\": \"score\", \"status\": \"normal\", \"desc\": \"抑郁指数\" },\n" +
                  "      \"anxiety\": { \"value\": 3, \"unit\": \"score\", \"status\": \"normal\", \"desc\": \"焦虑指数\" }\n" +
                  "    }\n" +
                  "  },\n" +
                  "  \"brief_report\": {\n" +
                  "    \"personality\": \"阳光自信\",\n" +
                  "    \"emotion\": \"高兴\",\n" +
                  "    \"overall_status\": \"优秀\",\n" +
                  "    \"abnormal_items\": [],\n" +
                  "    \"summary_text\": \"检测显示您的生理机能处于极佳状态，皮肤状况良好，心理压力较低，整体呈现出阳光自信的状态。\"\n" +
                  "  }\n" +
                  "}"
            },
          ],
        },
      ],
    };

    requestBody.input[0].content[0].video_url = videoBase64;
    const response = await fetch(apiUrl, {
      method: "POST",
      headers: {
        Authorization: `Bearer ${apiKey}`,
        "Content-Type": "application/json",
      },
      body: JSON.stringify(requestBody),
    });

    if (!response.ok) {
      const errorData = await response.json();
      throw new Error(`API请求失败: ${errorData.error?.message || "未知错误"}`);
    }

    const data = await response.json();
    return data;
  } catch (error: any) {
    console.error("调用Ark API失败:", error);
    errorMessage.value = `视频分析失败: ${error.message || "未知错误"}`;
    throw error;
  }
}