:root{color-scheme:light;font-family:Inter,Noto Sans TC,PingFang TC,Microsoft JhengHei,system-ui,-apple-system,BlinkMacSystemFont,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;--bg: #f7f9fb;--panel: #ffffff;--panel-soft: #fbfcfd;--line: #dce4ea;--line-strong: #cdd9e1;--text: #27313f;--muted: #6f7d8b;--teal: #0d9488;--teal-strong: #087c73;--teal-soft: #e6f7f5;--coral: #ff6b55;--coral-dark: #e65b47;--shadow: 0 16px 40px rgba(33, 45, 61, .12);--small-shadow: 0 8px 22px rgba(33, 45, 61, .08);background:var(--bg);color:var(--text)}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:var(--bg)}button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.48}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.app-shell{min-height:100vh;display:grid;grid-template-rows:66px 1fr 64px;background:linear-gradient(180deg,#fffffff5,#f7f9fbf5 34%),radial-gradient(circle at top left,rgba(13,148,136,.08),transparent 28%)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 28px;background:#ffffffeb;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.brand{display:flex;align-items:center;gap:12px;min-width:230px}.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;color:var(--teal);border:2px solid var(--teal);border-radius:8px;background:#f4fffd}.brand h1{margin:0;font-size:24px;line-height:1;font-weight:800;letter-spacing:0}.topbar-actions{display:flex;align-items:center;justify-content:flex-end;gap:12px;min-width:0}.ghost-button,.icon-text-button,.primary-button,.icon-only{border:1px solid 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