.academic-bar{background:#f0ece8;border-bottom:1px solid #ddd;font-size:.72rem;padding:.45rem 0;color:#555;font-family:"Times New Roman",serif}
.academic-bar .container{display:flex;flex-wrap:wrap;gap:.5rem 1.5rem}
.academic-bar em{color:#800020;font-style:normal;font-weight:700}

.hero-rational{padding:2.8rem 0 3.2rem;background:#fff;border-bottom:1px solid #ddd}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem;align-items:center}
.hero-grid h1{font-size:clamp(1.35rem,3.2vw,1.85rem);font-weight:700;color:#1a1a1a;line-height:1.35;margin-bottom:.85rem}
.hero-grid h1 em{color:#800020;font-style:normal}
.hero-desc{color:#555;font-size:.92rem;margin-bottom:1.2rem;max-width:520px}
.hero-btns{display:flex;flex-wrap:wrap;gap:.65rem;margin-bottom:1.5rem}
.trust-row{display:flex;flex-wrap:wrap;gap:1rem}
.trust-row .t{background:#faf8f5;border:1px solid #ddd;padding:.65rem 1rem;min-width:90px;text-align:center}
.trust-row strong{display:block;font-size:1.25rem;color:#800020;font-weight:700}
.trust-row span{font-size:.72rem;color:#555}

.utility-diagram{background:#faf8f5;border:2px solid #1a1a1a;padding:1.5rem;min-height:320px}
.utility-diagram svg{width:100%;height:auto;display:block}
.utility-caption{text-align:center;font-size:.72rem;color:#555;margin-top:.5rem;font-style:italic}

.hypothesis-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.hypothesis-card{background:#fff;border:1px solid #ddd;padding:1.2rem 1.1rem;border-top:4px solid #800020}
.hypothesis-card:nth-child(2){border-top-color:#1a1a1a}
.hypothesis-card:nth-child(3){border-top-color:#555}
.hyp-tag{font-family:"Times New Roman",serif;font-size:.68rem;color:#800020;margin-bottom:.45rem;font-style:italic}
.hypothesis-card h3{font-size:.95rem;color:#1a1a1a;margin-bottom:.4rem;font-weight:700}
.hypothesis-card p{font-size:.82rem;color:#555;line-height:1.55}

.model-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;counter-reset:step}
.model-step{background:#fff;border:1px solid #ddd;padding:1.2rem;text-align:center;counter-increment:step}
.model-step::before{content:"H" counter(step);display:block;font-size:.75rem;color:#800020;font-weight:700;margin-bottom:.5rem;font-style:italic}
.model-step h3{font-size:.92rem;color:#1a1a1a;margin-bottom:.35rem;font-weight:700}
.model-step p{font-size:.8rem;color:#555;line-height:1.5}

.dual-framework{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.framework-pane{background:#fff;border:1px solid #ddd}
.framework-pane .head{background:#1a1a1a;padding:.55rem 1rem;font-size:.72rem;color:#800020;font-style:italic}
.framework-pane .body{padding:1rem 1.1rem}
.framework-pane h3{font-size:.9rem;color:#1a1a1a;margin-bottom:.55rem;font-weight:700}
.framework-pane li{font-size:.82rem;color:#555;padding:.28rem 0 .28rem 1rem;position:relative;line-height:1.45}
.framework-pane li::before{content:"(i)";position:absolute;left:0;color:#800020;font-size:.7rem;font-style:italic}

.rational-cta{background:#1a1a1a;border-top:3px solid #800020;padding:2.5rem 0;text-align:center}
.rational-cta h2{font-size:clamp(1.1rem,2.8vw,1.45rem);color:#faf8f5;margin-bottom:.45rem;font-weight:700}
.rational-cta p{color:#aaa;font-size:.88rem;margin-bottom:1.1rem;font-style:italic}

.hero-img-wrap{margin-top:1rem;border:2px solid #1a1a1a;overflow:hidden}

@media(max-width:900px){
  .hero-grid,.hypothesis-cards,.model-steps,.dual-framework{grid-template-columns:1fr}
}