.research-shell{--research-gutter:clamp(20px,3vw,48px);--research-header-height:117px;min-height:100dvh;background:var(--bg);color:var(--text);font-family:var(--font-display),system-ui,"Noto Sans TC","PingFang TC",sans-serif;-webkit-font-smoothing:antialiased}.research-header{position:relative;z-index:20;background:var(--surface);border-bottom:1px solid var(--border)}.research-masthead{justify-content:space-between;min-height:68px;padding:10px var(--research-gutter)}.research-header-actions,.research-identity,.research-masthead{display:flex;align-items:center;gap:24px}.research-identity .brand-lockup{width:116px;height:36px}.research-home{display:grid;gap:3px;padding-left:24px;border-left:1px solid var(--border);color:var(--text);font-size:15px;font-weight:600;line-height:1.4;text-decoration:none}.research-home small{color:var(--text-muted);font:10px/1.4 var(--font-tech),sans-serif;letter-spacing:.12em}.research-header-actions>span{color:var(--text-muted);font-size:12px}.research-header .research-header-actions .icon-btn{width:44px;height:44px;padding:0;justify-content:center;border:1px solid var(--border);border-radius:var(--radius-field)}.research-header-actions svg{flex-shrink:0}.research-navigation{position:relative;display:flex;gap:28px;min-width:0;padding-inline:var(--research-gutter);overflow-x:auto;scrollbar-width:thin;border-top:1px solid var(--border)}.research-navigation a{position:relative;display:inline-flex;align-items:center;flex-shrink:0;min-height:47px;color:var(--text-muted);font-size:13px;font-weight:500;text-decoration:none;white-space:nowrap}.research-navigation a[aria-current]{color:var(--text)}.research-navigation a[aria-current]:after{position:absolute;inset:auto 0 0;height:2px;background:var(--blue);content:""}.research-header a:hover{color:var(--blue)}.research-shell :where(a,button,input,select,summary):focus-visible{outline:2px solid var(--focus);outline-offset:3px}.research-navigation a:focus-visible{outline-offset:-4px}.research-skip{position:absolute;top:8px;left:var(--research-gutter);z-index:30;padding:12px 18px;transform:translateY(-200%);border-radius:var(--radius-field);background:var(--accent);color:var(--accent-ink)}.research-skip:focus{transform:translateY(0)}@media (max-width:768px){.research-masthead{gap:12px}.research-identity{gap:16px}.research-identity .brand-lockup{width:94px;height:32px}.research-home{padding-left:16px;font-size:14px}.research-home small{font-size:8px}.research-header-actions>span{display:none}.research-navigation{gap:24px}}@media (prefers-reduced-motion:reduce){.research-shell *,.research-shell :after,.research-shell :before{scroll-behavior:auto!important;transition:none!important;animation:none!important}}