:root{--font-sans:"DM Sans", "Noto Sans TC", system-ui, -apple-system, "Segoe UI", sans-serif;--font-mono:ui-monospace, "Cascadia Code", "SF Mono", Consolas, monospace;--brand-1:#1478ec;--brand-2:#18c6ec;--brand-grad:linear-gradient(120deg, var(--brand-1), var(--brand-2));--brand-soft:#1478ec1a;--brand-text:#0f63c8;--bg:#eef7ff;--bg-grad:linear-gradient(160deg, #f8fcff 0%, #e8f5ff 55%, #d8f0ff 100%);--surface:#ffffffb8;--surface-strong:#ffffffeb;--surface-sunken:#1478ec0f;--border:#146ebe24;--border-strong:#146ebe47;--text:#0b2545;--text-2:#3d6285;--text-3:#7491ab;--on-brand:#fff;--shadow-sm:0 1px 2px #18558c14, 0 4px 12px #18558c0f;--shadow-md:0 8px 28px #18558c24;--shadow-lg:0 24px 60px #18558c38;--shadow-brand:0 10px 26px #0a7deb61;--user-bubble:linear-gradient(135deg, #1a7df0, #12b8ea);--code-bg:#0f2740;--code-head:#163653;--code-text:#d9ecff;--danger:#d6344a;--aurora-a:#50beff80;--aurora-b:#28dceb52;--aurora-c:#788cff47;--scrim:#081c346b;--radius-sm:12px;--radius-md:18px;--radius-lg:26px;--ease:cubic-bezier(.22, 1, .36, 1);--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px);--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}:root[data-theme=dark]{--brand-text:#6cb6ff;--brand-soft:#50a0ff29;--bg:#060c18;--bg-grad:linear-gradient(160deg, #070d1a 0%, #08142a 55%, #061d33 100%);--surface:#ffffff0f;--surface-strong:#14223aeb;--surface-sunken:#ffffff0d;--border:#a0cdff24;--border-strong:#a0cdff4d;--text:#e9f3ff;--text-2:#a3bbd6;--text-3:#6f89a6;--shadow-sm:0 1px 2px #0006, 0 4px 12px #00000040;--shadow-md:0 10px 30px #00000073;--shadow-lg:0 28px 70px #0009;--shadow-brand:0 10px 28px #1482ff59;--user-bubble:linear-gradient(135deg, #1f6fe0, 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toast-in{0%{opacity:0;transform:translateY(12px)scale(.96)}to{opacity:1;transform:none}}dialog.sheet{width:100%;max-width:none;height:100%;max-height:none;color:var(--text);background:0 0;border:0;margin:0;padding:0;overflow:hidden}dialog.sheet::backdrop{background:var(--scrim);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);animation:.25s both fade-in}.sheet-panel{border:1px solid var(--border);background:var(--bg);max-height:90dvh;box-shadow:var(--shadow-lg);animation:sheet-up .4s var(--ease) both;border-bottom:0;border-radius:28px 28px 0 0;flex-direction:column;display:flex;position:absolute;bottom:0;left:0;right:0}:root[data-theme=dark] .sheet-panel{background:#0b1526}.sheet-grabber{background:var(--border-strong);border-radius:4px;align-self:center;width:40px;height:4px;margin:10px 0 0}.sheet-head{justify-content:space-between;align-items:center;padding:8px 12px 4px 24px;display:flex}.sheet-head h2{font-size:20px;font-weight:700}.sheet-body{padding:14px 24px calc(28px 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