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0;border:none;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;padding:8px;display:flex}.nav-toggle span{background:var(--ink);border-radius:2px;width:100%;height:2px;transition:transform .2s,opacity .2s;display:block}.nav-toggle.open span:first-child{transform:translateY(7px)rotate(45deg)}.nav-toggle.open span:nth-child(2){opacity:0}.nav-toggle.open span:nth-child(3){transform:translateY(-7px)rotate(-45deg)}.nav{background:var(--surface);border-bottom:1px solid var(--line);box-shadow:var(--shadow);z-index:20;flex-direction:column;align-items:stretch;gap:0;padding:8px 0;display:none;position:absolute;top:64px;left:0;right:0}.nav.open{display:flex}.nav a{border-bottom:none;padding:14px 24px;font-size:16px}.nav a.active{color:var(--primary);background:#f5f1ea;border-bottom:none}.nav-btn{text-align:center;margin:10px 24px 6px}.hero-video{height:60vh;min-height:380px}.hero-brand{padding-bottom:16px;font-size:40px}.hero-tagline{font-size:15px}.home-section{padding:48px 0}.detail-head{flex-direction:column;gap:20px}.detail-photo{width:150px;height:190px}.detail-name{font-size:26px}.detail-list li{flex-direction:column;gap:2px}.detail-list-when{width:auto}.edit-grid{grid-template-columns:1fr}.edit{max-width:100%}.repeat-fields{flex-direction:column}.repeat-fields input{width:100%}.page-title{font-size:26px}.main{padding:32px 20px}.footer-nav{flex-wrap:wrap;gap:16px 20px}}@media (width<=400px){.hero-brand{font-size:32px}.member-grid{grid-template-columns:1fr 1fr}}.research-areas{background:var(--bg);padding:80px 0}.areas-grid{grid-template-columns:repeat(3,1fr);gap:28px;display:grid}.area-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:36px 30px;transition:box-shadow .18s,transform .18s}.area-card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}.area-num{font-family:var(--font-serif);color:var(--accent);letter-spacing:.1em;font-size:15px}.area-card h3{font-family:var(--font-serif);color:var(--ink);margin:12px 0 14px;font-size:22px}.area-card p{color:var(--ink-soft);margin:0;font-size:15px;line-height:1.7}@media (width<=768px){.research-areas{padding:48px 0}.areas-grid{grid-template-columns:1fr;gap:16px}.area-card{padding:28px 24px}}