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@media(max-width:1150px){.hero{grid-template-columns:1fr}.hero-answer{align-self:auto}.principle-strip{grid-template-columns:1fr 1fr}.principle-strip article:nth-child(3){border-left:0;border-top:1px solid var(--line)}.principle-strip article:nth-child(4){border-top:1px solid var(--line)}.process-grid{grid-template-columns:repeat(3,1fr)}.five-cards{grid-template-columns:repeat(2,1fr)}.five-cards article:last-child{grid-column:1/-1}.object-legend{grid-template-columns:1fr 1fr}.object-legend article:nth-child(3){border-left:0;border-top:1px solid var(--line)}.object-legend article:nth-child(4){border-top:1px solid var(--line)}}
@media(max-width:800px){main{width:min(100% - 24px,1560px)}.method-header{grid-template-columns:1fr auto;padding:12px}.brand{width:160px}.brand img{width:135px}.method-header-title{display:none}.back-link{font-size:.58rem}.section-nav{justify-content:flex-start;overflow:auto}.section-nav a{white-space:nowrap}.hero{padding-top:48px}.hero h1{font-size:2.55rem}.hero-answer article{grid-template-columns:1fr}.principle-strip,.split-heading,.two-column-explainer,.attention-layout,.limits-grid,.faq-grid{grid-template-columns:1fr}.principle-strip article{border-left:0;border-top:1px solid var(--line)}.principle-strip article:first-child{border-top:0}.process-grid{grid-template-columns:1fr 1fr}.five-cards{grid-template-columns:1fr}.five-cards article:last-child{grid-column:auto}.interpretation-band,.deep-card,.context-factors,.demo-note{grid-template-columns:1fr}.object-legend{grid-template-columns:1fr}.object-legend article{border-left:0;border-top:1px solid var(--line)}.object-legend article:first-child{border-top:0}.formula-block{grid-template-columns:1fr}.compact-steps{grid-template-columns:1fr}.decision-grid,.method-version{grid-template-columns:1fr}.method-version>p{grid-column:auto}.contact-cta,.method-footer{align-items:flex-start;flex-direction:column}.method-footer nav{flex-wrap:wrap}.content-section{padding:65px 0}.evidence-frame figcaption{position:static;width:auto}.evidence-frame img{min-height:280px}.attention-cases article{grid-template-columns:80px 1fr}}
@media(max-width:480px){.process-grid{grid-template-columns:1fr}.process-grid li{min-height:180px}.hero-lead{font-size:.88rem}.hero h1{font-size:2.2rem}.section-heading h2{font-size:2rem}.deep-card{padding:23px}.contact-cta{padding:23px}}
@media print{.method-header,.section-nav,.contact-cta,.method-footer{display:none}main{width:100%}.content-section{break-inside:avoid;padding:45px 0}.hero{padding-top:20px}.hero h1{font-size:44px}.evidence-frame img{max-height:520px}}

/* Methodology v2: layered overview, sample disclosure and report use cases */
.hero-answer-lead{margin:18px 0 0!important;color:var(--ink)!important;font-size:.86rem!important;line-height:1.65}
.layer-overview{margin-bottom:18px;padding:34px;border:1px solid var(--ink);border-radius:6px;background:#fff;box-shadow:var(--shadow)}
.layer-overview-heading{display:grid;grid-template-columns:210px minmax(280px,.7fr) 1fr;gap:25px;align-items:end;margin-bottom:28px}
.layer-overview-heading .eyebrow{align-self:start}
.layer-overview-heading h2{margin:0;font-size:clamp(1.8rem,3vw,3.2rem);line-height:1;letter-spacing:-.045em;text-transform:uppercase}
.layer-overview-heading>p:last-child{margin:0;color:var(--muted);font-size:.76rem}
.layer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.layer-grid article{display:flex;min-height:275px;flex-direction:column;padding:22px;border:1px solid var(--ink);border-top:7px solid var(--green);border-radius:5px;background:#fff}
.layer-grid .layer-vision{border-top-color:var(--blue)}
.layer-grid .layer-attention{border-top-color:var(--red)}
.layer-grid article>span{font-size:.58rem;font-weight:900;letter-spacing:.08em}
.layer-grid h3{margin:32px 0 13px;font-size:1.5rem}
.layer-grid p{margin:0;color:var(--muted);font-size:.68rem}
.layer-grid small{display:block;margin-top:auto;padding-top:18px;border-top:1px solid var(--line);font-size:.58rem;font-weight:800}
.source-key{display:flex;flex-wrap:wrap;gap:24px;margin-top:20px;padding-top:18px;border-top:1px solid var(--line)}
.source-key span{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:.63rem;font-weight:700}
.source-key i{width:10px;height:10px;border-radius:50%}
.source-key .mobile-dot{background:var(--green)}
.source-key .vision-dot{background:var(--blue)}
.sample-panel{display:grid;grid-template-columns:minmax(300px,.72fr) minmax(600px,1.28fr);gap:34px;margin-top:12px;padding:30px;border:1px solid var(--ink);border-left:8px solid var(--blue);border-radius:6px;background:#fff}
.sample-summary h3{margin:0 0 18px;font-size:clamp(1.6rem,2.6vw,2.75rem);line-height:1.05}
.sample-summary>p:last-child{margin:0;color:var(--muted);font-size:.72rem}
.sample-table-wrap{overflow:auto}
.sample-panel,.sample-table-wrap{min-width:0;max-width:100%}
.sample-table{width:100%;border-collapse:collapse;font-size:.68rem}
.sample-table th,.sample-table td{padding:11px 12px;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}
.sample-table th:first-child,.sample-table td:first-child{text-align:left}
.sample-table th{background:#f2efe9;font-size:.58rem;letter-spacing:.04em;text-transform:uppercase}
.sample-table tbody tr:hover{background:var(--blue-soft)}
.sample-table td:first-child{font-weight:750}
.sample-footnote{grid-column:1/-1;margin:0;padding-top:16px;border-top:1px solid var(--line);color:var(--muted);font-size:.58rem}
.evidence-frame img{max-height:none;aspect-ratio:16/9;object-fit:contain}
.report-use-heading{display:grid;grid-template-columns:190px minmax(320px,.8fr) 1fr;gap:26px;align-items:end;margin:58px 0 24px}
.report-use-heading h3{margin:0;font-size:clamp(1.7rem,3vw,3rem);line-height:1;letter-spacing:-.045em;text-transform:uppercase}
.report-use-heading>p:last-child{margin:0;color:var(--muted);font-size:.72rem}
.report-use-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.report-use-grid article{padding:30px;border:1px solid var(--ink);border-top:8px solid var(--green);border-radius:6px;background:#fff}
.report-use-grid .postbuy-use{border-top-color:var(--blue)}
.report-use-grid article>span{font-size:.64rem;font-weight:900;letter-spacing:.08em}
.report-use-grid h3{margin:22px 0 14px;font-size:1.45rem;line-height:1.12}
.report-moment{padding:14px;border-left:5px solid var(--green);background:var(--green-soft);font-size:.7rem}
.postbuy-use .report-moment{border-left-color:var(--blue);background:var(--blue-soft)}
.report-use-grid ol{display:grid;gap:10px;margin:22px 0;padding-left:22px}
.report-use-grid li{font-size:.7rem}
.report-use-grid small{display:block;margin-top:22px;padding-top:16px;border-top:1px solid var(--line);color:var(--muted);font-size:.59rem}

@media(max-width:1150px){
  .layer-overview-heading{grid-template-columns:1fr 1fr}
  .layer-overview-heading .eyebrow{grid-column:1/-1}
  .layer-grid{grid-template-columns:1fr 1fr}
  .sample-panel{grid-template-columns:1fr}
  .sample-footnote{grid-column:auto}
}
@media(max-width:800px){
  .layer-overview{padding:22px}
  .layer-overview-heading,.layer-grid,.report-use-heading,.report-use-grid{grid-template-columns:1fr}
  .layer-overview-heading .eyebrow{grid-column:auto}
  .evidence-frame img{min-height:0}
}
@media(max-width:480px){
  .sample-panel{padding:20px}
  .sample-table th,.sample-table td{padding:9px 10px}
}

/* Methodology v3: clearer layers, seasonality and documented production process */
.measurement-flow .process-grid{grid-template-columns:repeat(3,1fr)}
.measurement-flow .process-grid li{min-height:270px}
.process-grid small{display:block;margin-top:14px;padding-top:13px;border-top:1px solid var(--line);color:var(--muted);font-size:.59rem;line-height:1.55}
.process-disclaimer{margin:14px 0 0;padding:16px 20px;border-left:6px solid var(--yellow);background:var(--yellow-soft);font-size:.66rem}
.layer-section-heading{align-items:end}
.layer-section-heading>div{min-width:0}
.layer-section-heading .layer-display{max-width:none;margin:0;font-size:clamp(4.2rem,8vw,8.2rem);line-height:.8;letter-spacing:-.075em;text-transform:uppercase}
.layer-section-heading h3{max-width:880px;margin:24px 0 0;font-size:clamp(1.35rem,2.3vw,2.35rem);line-height:1.08;letter-spacing:-.035em}
.three-cards{grid-template-columns:repeat(3,1fr)}
.two-cards{grid-template-columns:repeat(2,1fr)}
.seasonality-panel{display:grid;grid-template-columns:minmax(320px,.7fr) minmax(620px,1.3fr);gap:34px;align-items:stretch;margin:14px 0 0;padding:30px;border:1px solid var(--ink);border-left:8px solid var(--green);border-radius:6px;background:#fff}
.seasonality-copy h3{margin:0 0 18px;font-size:clamp(1.6rem,2.5vw,2.7rem);line-height:1.04;letter-spacing:-.04em}
.seasonality-copy>p:not(.eyebrow){margin:0;color:var(--muted);font-size:.75rem}
.seasonality-callout{margin-top:24px;padding:17px;border-left:5px solid var(--green);background:var(--green-soft);font-size:.68rem}
.seasonality-chart{margin:0;padding:20px;border:1px solid var(--line);background:#faf8f3}
.seasonality-chart figcaption{display:flex;justify-content:space-between;gap:18px;align-items:baseline;margin-bottom:8px;font-size:.65rem}
.seasonality-chart figcaption span{color:var(--muted);font-size:.56rem}
.seasonality-chart svg{display:block;width:100%;height:auto;overflow:visible}
.chart-grid line{stroke:#ddd7ce;stroke-width:1}
.chart-average{stroke:#666;stroke-width:2;stroke-dasharray:9 8}
.chart-average-label{fill:#555;font-size:18px;font-weight:700}
.chart-line{fill:none;stroke:var(--green-dark);stroke-width:6;stroke-linecap:round;stroke-linejoin:round}
.chart-points circle{fill:#fff;stroke:var(--green-dark);stroke-width:5;cursor:help}
.chart-labels text{fill:#706d68;font-size:16px;text-anchor:middle}
.seasonality-chart>p{margin:0;color:var(--muted);font-size:.56rem;text-align:right}
.audience-heading{margin-top:72px}
.evidence-frame video{display:block;width:100%;aspect-ratio:16/9;object-fit:contain;background:#111}
.evidence-frame figcaption{top:20px;bottom:auto}

@media(max-width:1150px){
  .seasonality-panel{grid-template-columns:1fr}
}
@media(max-width:800px){
  .measurement-flow .process-grid,.three-cards,.two-cards{grid-template-columns:1fr}
  .measurement-flow .process-grid li{min-height:0}
  .layer-section-heading .layer-display{font-size:clamp(3rem,14vw,5.2rem)}
  .layer-section-heading h3{font-size:1.35rem}
  .seasonality-panel{padding:22px}
  .seasonality-chart{padding:12px}
  .evidence-frame figcaption{position:static;width:auto}
}
@media(max-width:480px){
  .layer-section-heading .layer-display{font-size:2.8rem}
  .audience-heading .layer-display{font-size:2.25rem;line-height:.9}
  .seasonality-panel{padding:18px}
  .seasonality-chart figcaption{display:grid;gap:2px}
}

/* Methodology v4: visual process, interactive charts and clearer hierarchy */
.layer-section-heading .layer-display{font-size:clamp(3.6rem,6.4vw,6.7rem)}
.audience-heading .layer-display{font-size:clamp(3.1rem,5.2vw,5.5rem)}
.layer-grid p,.metric-card p,.explain-panel>p:not(.eyebrow),.deep-card p,.decision-grid p,.limits-grid li,.faq-grid p{font-size:clamp(.72rem,.8vw,.84rem);line-height:1.65}
.layer-grid small,.metric-card small,.report-use-grid small,.sample-footnote{font-size:clamp(.62rem,.7vw,.72rem);line-height:1.55}
.layer-grid article{min-height:300px}
.metric-card{min-height:280px}
.measurement-flow .process-grid li{display:flex;min-height:560px;flex-direction:column;padding:0 20px 22px;overflow:hidden}
.process-visual{height:210px;margin:0 -20px 18px;border-bottom:1px solid var(--ink);background:#ece9e2;overflow:hidden}
.process-visual img{display:block;width:100%;height:100%;object-fit:cover}
.process-grid li>span{margin:0 0 14px}
.process-grid li>small{margin-top:auto}
.process-map{position:relative;z-index:1;contain:layout paint size}
.method-pin{display:grid;width:30px;height:30px;place-items:center;border:3px solid #fff;border-radius:50% 50% 50% 0;color:#132317;background:var(--green-dark);box-shadow:0 3px 12px rgba(0,0,0,.25);font-size:10px;font-weight:900;transform:rotate(-45deg)}
.method-pin span{transform:rotate(45deg)}
.process-map .leaflet-control-attribution{font-size:8px}
.process-map .leaflet-control-zoom{display:none}
.process-metrics{display:grid;height:210px;grid-template-columns:1fr 1fr;gap:1px;background:#c8c4bd}
.process-metrics b{display:grid;grid-template-columns:1fr auto;gap:7px;align-items:center;padding:10px;background:#fff;font-size:.62rem;font-style:normal}
.process-metrics em{font-size:.72rem;font-style:normal}
.process-ranking{display:grid;height:210px;align-content:center;padding:12px;background:#f6f3ee}
.process-ranking b{display:grid;grid-template-columns:28px 1fr auto;gap:8px;align-items:center;padding:8px;border-bottom:1px solid var(--line);font-size:.6rem}
.process-ranking b:last-child{border-bottom:0}
.process-ranking i{display:grid;width:24px;height:24px;place-items:center;border-radius:50%;background:#ddd;font-size:.55rem;font-style:normal}
.process-ranking em{font-size:.68rem;font-style:normal}
.process-ranking .ranking-focus{background:var(--yellow-soft)}
.process-ranking .ranking-focus i{background:var(--yellow)}

#methodologySeasonalityChart{position:relative;min-width:0;padding:18px;background:#faf8f3}
#methodologySeasonalityChart figcaption{display:flex;justify-content:space-between;gap:16px;margin-bottom:6px}
#methodologySeasonalityChart figcaption span{font-size:.64rem;font-weight:900}
#methodologySeasonalityChart figcaption small{color:var(--muted);font-size:.6rem}
#methodologySeasonalityChart svg{display:block;width:100%;height:auto}
#methodologySeasonalityChart .chart-grid-line{stroke:#d9d4cb;stroke-width:1}
#methodologySeasonalityChart .chart-tick{fill:#6e6b66;font-size:13px}
#methodologySeasonalityChart .traffic-line,#methodologySeasonalityChart .reach-line,#methodologySeasonalityChart .frequency-line{fill:none;vector-effect:non-scaling-stroke}
#methodologySeasonalityChart .traffic-line{stroke:#222;stroke-width:3}
#methodologySeasonalityChart .reach-line{stroke:var(--orange);stroke-width:3}
#methodologySeasonalityChart .frequency-line{stroke:#858585;stroke-width:1.3;stroke-dasharray:6 5;opacity:.75}
#methodologySeasonalityChart .traffic-point{fill:#fff;stroke:#222;stroke-width:3}
#methodologySeasonalityChart .reach-point{fill:#fff;stroke:var(--orange);stroke-width:3}
#methodologySeasonalityChart .frequency-point{fill:#fff;stroke:#858585;stroke-width:1.2}
#methodologySeasonalityChart .mean-line{fill:none;stroke-width:1.2;stroke-dasharray:7 6;opacity:.78}
#methodologySeasonalityChart .mean-traffic{stroke:#222}
#methodologySeasonalityChart .mean-reach{stroke:var(--orange)}
#methodologySeasonalityChart .seasonality-hit-area{fill:transparent;pointer-events:all;cursor:crosshair}
#methodologySeasonalityChart .seasonality-hover-line{stroke:#777;stroke-width:1;stroke-dasharray:3 4;pointer-events:none}
.seasonality-legend,.chart-means{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.seasonality-legend span,.chart-means span{padding:5px 8px;border-left:3px solid #222;background:#fff;font-size:.62rem}
.seasonality-legend .reach,.chart-means .reach{border-left-color:var(--orange)}
.seasonality-legend .frequency{border-left-color:#858585}
.method-tooltip{position:absolute;z-index:5;top:46px;min-width:190px;padding:10px 12px;border:1px solid var(--ink);background:rgba(255,253,248,.98);box-shadow:0 5px 14px rgba(34,34,34,.14);pointer-events:none}
.method-tooltip strong{display:block;margin-bottom:5px;font-size:.7rem}
.method-tooltip span{display:grid;grid-template-columns:1fr auto;gap:18px;padding:2px 0;font-size:.64rem}

.vision-demo{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);border:1px solid var(--ink);border-radius:6px;overflow:hidden;background:#fff}
.vision-video-wrap{position:relative;display:grid;align-items:center;background:#111}
.vision-video-wrap video{display:block;width:100%;height:100%;min-height:520px;object-fit:contain}
.video-play-fallback{position:absolute;left:50%;bottom:24px;padding:12px 16px;border:1px solid #fff;border-radius:4px;color:#fff;background:rgba(34,34,34,.88);font-weight:800;transform:translateX(-50%)}
.vision-video-wrap.is-playing .video-play-fallback{display:none}
.vision-chart-wrap{display:grid;grid-template-rows:auto 1fr auto auto;min-width:0;padding:22px;border-left:1px solid var(--ink)}
.vision-chart-heading{display:flex;justify-content:space-between;gap:18px;align-items:flex-end;margin-bottom:10px}
.vision-chart-heading div{display:grid;gap:5px}
.vision-chart-heading span{color:var(--green-dark);font-size:.62rem;font-weight:900;letter-spacing:.08em}
.vision-chart-heading strong{font-size:1.15rem}
.vision-chart-heading small{max-width:220px;color:var(--muted);font-size:.6rem;text-align:right}
#methodologyFrameChart svg{display:block;width:100%;height:auto;cursor:crosshair}
#methodologyFrameChart .frame-grid-line{stroke:#ded9d0;stroke-width:1}
#methodologyFrameChart .frame-axis-label,#methodologyFrameChart .frame-distance-label{fill:#777;font-size:13px}
#methodologyFrameChart .frame-distance-label{font-size:11px}
#methodologyFrameChart .frame-clean-zone{fill:rgba(77,121,255,.10)}
#methodologyFrameChart .frame-site-area{fill:rgba(18,143,62,.78)}
#methodologyFrameChart .frame-cover-area{fill:rgba(255,201,60,.82)}
#methodologyFrameChart .frame-clutter-area{fill:rgba(232,76,68,.78)}
#methodologyFrameChart .frame-clean-baseline{stroke:#7c9cff;stroke-width:7;stroke-linecap:round}
#methodologyFrameChart .frame-cursor-line{stroke:#222;stroke-width:2;pointer-events:none}
#methodologyFrameChart .frame-cursor-dot{fill:#fff;stroke:#222;stroke-width:3;pointer-events:none}
#methodologyFrameChart .frame-chart-hit{fill:transparent;pointer-events:all}
.vision-live-metrics,.vision-final-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:12px;background:var(--line)}
.vision-live-metrics span,.vision-final-metrics span{display:grid;gap:4px;padding:12px;background:#faf8f3;font-size:.58rem}
.vision-live-metrics b,.vision-final-metrics b{font-size:.9rem}
.vision-final-metrics{position:relative;padding-top:30px;border-top:1px solid var(--ink);background:var(--line)}
.vision-final-metrics>strong{position:absolute;top:7px;left:0;font-size:.6rem;text-transform:uppercase}

.report-link{display:flex;justify-content:space-between;align-items:center;margin-top:22px;padding:14px 16px;border:1px solid var(--ink);background:var(--ink);color:#fff;font-size:.68rem;font-weight:900;text-decoration:none}
.report-link:hover{background:var(--green-dark)}
.postbuy-use .report-link:hover{background:var(--blue)}
.limits-answer-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:12px}
.limits-answer-grid article{display:grid;gap:18px;align-content:start;min-height:300px;padding:30px;border:1px solid var(--ink);border-top:9px solid var(--green);background:#fff}
.limits-answer-grid .limits-no{border-top-color:var(--red)}
.limits-answer-grid span{font-size:.64rem;font-weight:900;letter-spacing:.08em}
.limits-answer-grid strong{font-size:clamp(1.35rem,2.3vw,2.25rem);line-height:1.08}
.limits-answer-grid p{margin:0;color:var(--muted);font-size:.82rem;line-height:1.7}

@media(max-width:1000px){
  .vision-demo{grid-template-columns:1fr}
  .vision-video-wrap video{min-height:0}
  .vision-chart-wrap{border-top:1px solid var(--ink);border-left:0}
}
@media(max-width:800px){
  .measurement-flow .process-grid li{min-height:0}
  .process-visual{height:230px}
  .limits-answer-grid{grid-template-columns:1fr}
  .vision-chart-heading{align-items:flex-start;flex-direction:column}
  .vision-chart-heading small{text-align:left}
  .layer-section-heading .layer-display{font-size:clamp(2.8rem,13vw,4.6rem)}
  .audience-heading .layer-display{font-size:clamp(2.35rem,11vw,4rem)}
}
@media(max-width:520px){
  .process-visual{height:200px}
  .vision-chart-wrap{padding:14px}
  .vision-live-metrics,.vision-final-metrics{grid-template-columns:1fr}
  #methodologySeasonalityChart{padding:10px}
  #methodologySeasonalityChart figcaption{display:grid}
}

/* Methodology v6: reliable assets and section-aware navigation */
.method-header-actions{display:flex;align-items:center;gap:10px}
.method-language-switch select{padding:12px 34px 12px 12px;border:1px solid #777;border-radius:4px;color:#fff;background:#292929;font-size:.7rem;font-weight:800}
.section-nav{scrollbar-width:none}
.section-nav::-webkit-scrollbar{display:none}
.section-nav a{transition:color .15s ease,background .15s ease}
.section-nav a.is-active{color:var(--ink);background:var(--green);box-shadow:inset 0 -3px 0 var(--green-dark)}
.process-ranking{align-content:start;overflow:hidden}
.process-ranking b{min-height:25px;padding:5px 8px}
.process-ranking i{width:21px;height:21px}
.process-ranking span{min-width:0;margin:0;color:var(--ink);font-size:.6rem;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.report-use-heading{grid-template-columns:minmax(320px,.8fr) 1fr}
@media(max-width:800px){
  html,body{max-width:100%;overflow-x:clip}
  .method-header-actions{gap:6px}
  .method-language-switch select{padding:10px 28px 10px 9px;font-size:.58rem}
  .section-nav{max-width:100vw;overflow-x:auto;overflow-y:hidden}
}