diff --git a/h5/js/app.js b/h5/js/app.js
index 1f74006..8143e6c 100644
--- a/h5/js/app.js
+++ b/h5/js/app.js
@@ -607,7 +607,7 @@
       var img = new Image();
       img.onload = function () {
         faceapi
-          .detectAllFaces(img, new faceapi.TinyFaceDetectorOptions({ inputSize: DETECT_INPUT_SIZE, scoreThreshold: DETECT_SCORE }))
+          .detectAllFaces(img, new faceapi.TinyFaceDetectorOptions({ inputSize: DETECT_INPUT_SIZE, scoreThreshold: CaptureQuality.scoreThreshold(target) }))
           .withFaceLandmarks()
           .then(function (faces) {
             var d = faces[0], box = d && d.detection.box;
@@ -768,8 +768,8 @@
   var MODEL_URL = 'vendor/faceapi/models';
   var DETECT_INTERVAL = 150;   // 检测帧间隔(ms)
   var DETECT_INPUT_SIZE = 416; // tinyFaceDetector 输入尺寸:320 下正脸置信度仅 0.67 且框偏松,416 置信度 ~0.99 框更准(CPU 端略慢,移动端 GPU 无感)
-  var DETECT_SCORE = CaptureQuality.config.score;
   var MISS_FRAMES_MAX = 3;     // 连续漏检 ≥3 帧(~450ms)才报「未检测到人脸」,容忍单帧抖动
+  var FRONT_MISS_FRAMES_MAX = 6; // 正面首次发现人脸前，多给相机对焦/曝光几次检测机会。
   var NO_PROGRESS_MS = 12000;  // 单步超过该时长仍未抓拍→浮出调整提示
   var PREVIEW_SCALE = 1;       // 与 CSS #cam-video 铺满预览一致，镜像只改变方向
 
@@ -860,6 +860,7 @@
     holdState = null;
     resetAngleHaptic();
     missFrames = 0;
+    frontFaceSeen = false;
     oppFrames = 0;
     lastHint = '';
     clearTimeout(nudgeTimer);
@@ -913,7 +914,7 @@
     if (shutterLock || capturing || !camLive) return Promise.resolve(); // 抓帧/流程推进中不判姿态
     var step = camStep, seq = camSeq, generation = detGeneration; // 旧镜头推理结果不能污染新镜头
     return faceapi
-      .detectAllFaces(camVideo, new faceapi.TinyFaceDetectorOptions({ inputSize: DETECT_INPUT_SIZE, scoreThreshold: DETECT_SCORE }))
+      .detectAllFaces(camVideo, new faceapi.TinyFaceDetectorOptions({ inputSize: DETECT_INPUT_SIZE, scoreThreshold: CaptureQuality.scoreThreshold(CAM_STEPS[step].target) }))
       .withFaceLandmarks()
       .then(function (d) {
         if (step !== camStep || seq !== camSeq || generation !== detGeneration) return;
@@ -941,6 +942,7 @@
     } catch (e) { return null; }
   }
   var missFrames = 0; // 连续漏检帧计数:单帧抖动不报「未检测到人脸」
+  var frontFaceSeen = false;
   /* camera-haptic-pure-begin */
   function captureHaptic(nav) {
     // Unsupported/blocked vibration must never interrupt automatic capture.
@@ -976,7 +978,10 @@
     if (Array.isArray(d)) d = d[0];
     var hint = '', ok = false;
     missFrames = d ? 0 : missFrames + 1;
-    var hasFace = !!d, noFace = !hasFace && missFrames >= MISS_FRAMES_MAX;
+    var hasFace = !!d;
+    if (hasFace && CAM_STEPS[camStep].target === 'front') frontFaceSeen = true;
+    var missLimit = CAM_STEPS[camStep].target === 'front' && !frontFaceSeen ? FRONT_MISS_FRAMES_MAX : MISS_FRAMES_MAX;
+    var noFace = !hasFace && missFrames >= missLimit;
     if (noFace) {
       hint = '未检测到人脸';
     } else if (!hasFace) {
diff --git a/h5/js/capture-quality.js b/h5/js/capture-quality.js
index 7bafc18..ecd6d9a 100644
--- a/h5/js/capture-quality.js
+++ b/h5/js/capture-quality.js
@@ -6,11 +6,12 @@
   'use strict';
   // Real-phone feedback: ease alignment and normal hand/head movement while
   // retaining two checked frames, one face, framing and final JPEG validation.
-  var config = Object.freeze({ version: '2026-10-15-pitch-roll-relaxed-v7', score: 0.4,
+  var config = Object.freeze({ version: '2026-10-16-front-detection-v8', score: 0.4, frontScore: 0.3,
     near: 0.30, far: 0.68, center: 0.16, edge: 0.01,
     dark: 110, bright: 220, holdMs: 450, minFrames: 2, maxGapMs: 2000,
     yawDrift: 8, pitchDrift: 8, centerDrift: 0.055, sizeDrift: 0.065 });
   function finite(v) { return typeof v === 'number' && isFinite(v); }
+  function scoreThreshold(target) { return target === 'front' ? config.frontScore : config.score; }
   function evaluate(d, options) {
     var failed = function(hint, reason) { return { ok: false, hint: hint, reason: reason || 'quality' }; };
     if (!d) return failed('未检测到人脸');
@@ -18,7 +19,7 @@
     var box = d.detection.box, w = options.width, h = options.height;
     if (!box || ![box.x, box.y, box.width, box.height, w, h].every(finite) || w <= 0 || h <= 0 || box.width <= 0 || box.height <= 0) return failed('请将脸部完整移入取景框');
     var ratio = box.height / h;
-    if (!finite(d.detection.score) || d.detection.score < config.score) return failed('请保持面部清晰');
+    if (!finite(d.detection.score) || d.detection.score < scoreThreshold(options.target)) return failed('请保持面部清晰');
     if (ratio < config.near) return failed('请靠近一点');
     if (ratio > config.far) return failed('请远一点');
     if (box.x < w * config.edge || box.y < h * config.edge || box.x + box.width > w * (1 - config.edge) || box.y + box.height > h * (1 - config.edge)) return failed('请将脸部完整移入取景框');
@@ -51,5 +52,5 @@
       { since: state.since, lastAt: now, frames: state.frames + 1, anchor: state.anchor };
     return { state: next, ready: now - next.since >= config.holdMs && next.frames >= config.minFrames };
   }
-  return { config: config, evaluate: evaluate, hold: hold };
+  return { config: config, scoreThreshold: scoreThreshold, evaluate: evaluate, hold: hold };
 });
diff --git a/h5/test/capture-quality-browser.mjs b/h5/test/capture-quality-browser.mjs
index c01d793..001c32d 100644
--- a/h5/test/capture-quality-browser.mjs
+++ b/h5/test/capture-quality-browser.mjs
@@ -152,7 +152,7 @@ try {
   for (const key of ['front', 'left', 'right']) {
     const row = body.capture_diagnostics.views[key];
     assert.equal(row.mode, 'live'); assert.equal(row.direction_checked, true);
-    assert(row.score >= .4 && row.luma >= 110 && row.luma <= 220);
+    assert(row.score >= (key==='front'?.3:.4) && row.luma >= 110 && row.luma <= 220);
     assert(Math.abs(row.roll) <= 22);
   }
   assert(Math.abs(body.capture_diagnostics.views.front.yaw) <= 18);
diff --git a/h5/test/customer-feedback-fourth.js b/h5/test/customer-feedback-fourth.js
index f27c4b5..2ac19f5 100644
--- a/h5/test/customer-feedback-fourth.js
+++ b/h5/test/customer-feedback-fourth.js
@@ -73,7 +73,11 @@ for (const changes of [{ height: 179 }, { height: 410 }, { x: -10 }, { y: 5 }])
   const d = face(); Object.assign(d.detection.box, changes); assert(!check(d).ok);
 }
 const weak = face(); weak.detection.score = .45; assert(check(weak).ok);
-weak.detection.score = .35; assert(!check(weak).ok);
+for(const score of [.3,.35,.3999]){const d=face();d.detection.score=score;assert(check(d).ok,'relaxed front confidence');}
+const low=face();low.detection.score=.2999;assert.equal(check(low).hint,'请保持面部清晰');
+for(const target of ['left','right']){const d=face(target==='left'?-45:45);d.detection.score=.35;assert.equal(check(d,{target}).hint,'请保持面部清晰');d.detection.score=.4;assert(check(d,{target}).ok);}
+assert.equal(Quality.scoreThreshold('front'),.3);assert.equal(Quality.scoreThreshold('left'),.4);assert.equal(Quality.scoreThreshold('right'),.4);
+weak.detection.score = .29; assert(!check(weak).ok);
 const obs = check(face()).observation;
 let held = Quality.hold(null, obs, 1000); assert(!held.ready);
 held = Quality.hold(held.state, obs, 1400); assert(!held.ready);
@@ -116,7 +120,7 @@ assert.equal(Diagnostics.assess(raw).views.right.status, 'valid');
 const normalized = Diagnostics.normalize({ version: Quality.config.version, secret: 'discard', views: { front: { mode: 'live', yaw: 1, score: .9, luma: Infinity, secret: 'discard' }, left: { mode: 'unchecked', reason: 'model-unavailable' } } });
 assert.equal(normalized.policy.capture.holdMs, 450);
 assert.equal(normalized.policy.capture.minFrames, 2);
-assert.equal(normalized.version, '2026-10-15-pitch-roll-relaxed-v7');
+assert.equal(normalized.version, '2026-10-16-front-detection-v8');
 assert.equal(normalized.views.front.luma, undefined);
 assert(!JSON.stringify(normalized).includes('discard'));
 assert.equal(Diagnostics.normalize({ version: '<script>' }).version, 'unknown');
diff --git a/h5/test/customer-feedback-second.js b/h5/test/customer-feedback-second.js
index ff2f034..919b52f 100644
--- a/h5/test/customer-feedback-second.js
+++ b/h5/test/customer-feedback-second.js
@@ -43,7 +43,7 @@ assert.equal(pattern, 30);
 // are stubs; the relaxed shared hold policy now requires 450ms/2 frames.
 let now = 10000, buzzes = 0, captures = 0;
 const state = {
-  missFrames: 0, MISS_FRAMES_MAX: 3, camVideo: { videoHeight: 600 }, FACE_NEAR: .30, FACE_FAR: .68,
+  missFrames: 0, MISS_FRAMES_MAX: 3, FRONT_MISS_FRAMES_MAX: 6, frontFaceSeen:false, camVideo: { videoHeight: 600 }, FACE_NEAR: .30, FACE_FAR: .68,
   faceOffsetX: () => 0, CENTER_TOL: .18, CAM_STEPS: [{ target: 'front' }], camStep: 0,
   HeadPose: { check: () => ({ ok: true }) }, sideYawFlip: false, faceLuma: () => 100,
   LUMA_DARK: 65, LUMA_BRIGHT: 235, window: {}, setMask: () => {}, setHint: () => {},
@@ -113,4 +113,17 @@ for (const nav of [{}, { vibrate: () => false }, { vibrate: () => { throw Error(
   state.navigator = nav; state.resetAngleHaptic();
   state.onDetect(face); now += 1000; assert.doesNotThrow(() => state.onDetect(face));
 }
-console.log('PASS: rounded contours; 1s invalid-angle cue, 4s throttle, cancellation/lifecycle, unsupported safety; unchanged 450ms/2-frame capture hold');
+const missingHints=[];state.setHint=text=>missingHints.push(text);
+state.resetAngleHaptic();state.frontFaceSeen=false;state.missFrames=0;state.CAM_STEPS[0].target='front';
+const priorCaptures=captures;
+for(let i=0;i<5;i++)state.onDetect(null);
+assert.equal(missingHints.length,0,'initial front misses are quiet for five detections');
+state.onDetect(null);assert.equal(missingHints.at(-1),'未检测到人脸');
+missingHints.length=0;state.missFrames=0;state.frontFaceSeen=true;
+state.onDetect(null);state.onDetect(null);assert.equal(missingHints.length,0);
+state.onDetect(null);assert.equal(missingHints.at(-1),'未检测到人脸','after seeing a front face retain normal missing detection');
+missingHints.length=0;state.missFrames=0;state.frontFaceSeen=false;state.CAM_STEPS[0].target='right';
+state.onDetect(null);state.onDetect(null);assert.equal(missingHints.length,0);
+state.onDetect(null);assert.equal(missingHints.at(-1),'未检测到人脸','side missing threshold unchanged');
+assert.equal(captures,priorCaptures,'warmup never permits capture without a face');
+console.log('PASS: initial-front missing tolerance6 vs normal3, no empty capture; angle haptics/lifecycle and unchanged 450ms/2-frame hold');