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16px;border:none;background:none;color:var(--text, #e8e8f0);font-size:14px;text-align:left;cursor:pointer}.context-item:hover{background:var(--accent, #e94560);color:#fff}.scroll-bottom-btn{position:absolute;bottom:80px;right:20px;width:40px;height:40px;border-radius:50%;background:var(--accent, #e94560);color:#fff;border:none;font-size:18px;cursor:pointer;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;box-shadow:0 2px 10px #e9456066;z-index:10}.scroll-bottom-btn.visible{opacity:1;pointer-events:auto}.scroll-bottom-btn:active{transform:scale(.95)}:root,[data-theme=dark]{--bg-primary: #1a1a2e;--bg-secondary: #16213e;--bg-card: #2a2a3e;--bg-input: #232340;--bg-code: #0d1117;--bubble-user: #0f3460;--bubble-ai: #2a2a3e;--accent: #e94560;--accent-hover: #ff6b81;--text-primary: #e8e8f0;--text-secondary: #9898b0;--text-muted: #6a6a80;--border: #333355;--success: #2ecc71;--warning: #f39c12;--danger: #e74c3c;--radius-sm: 8px;--radius-md: 14px;--radius-lg: 20px;--safe-bottom: env(safe-area-inset-bottom, 0px);--safe-top: env(safe-area-inset-top, 0px);--header-h: 52px;--input-h: 56px}[data-theme=light]{--bg-primary: #f5f5f7;--bg-secondary: #ffffff;--bg-card: #eeeef0;--bg-input: #f0f0f2;--bg-code: #f6f8fa;--bubble-user: #007aff;--bubble-ai: #e9e9eb;--accent: #e94560;--accent-hover: #d63851;--text-primary: #1c1c1e;--text-secondary: #6e6e73;--text-muted: #aeaeb2;--border: #d1d1d6;--success: #34c759;--warning: #ff9500;--danger: #ff3b30}[data-theme=light] .msg.user .msg-bubble{color:#fff}[data-theme=light] .msg-bubble strong{color:#1c1c1e}[data-theme=light] .msg-bubble code{background:#e8e8ea}[data-theme=light] .hl-keyword{color:#d73a49}[data-theme=light] .hl-string{color:#032f62}[data-theme=light] .hl-comment{color:#6a737d}[data-theme=light] .hl-number{color:#005cc5}[data-theme=light] .hl-func{color:#6f42c1}[data-theme=light] .hl-type{color:#e36209}.logo-bg{fill:#1a1a2e}[data-theme=light] 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