:root{--bg: #f5f5f7;--panel: #ffffff;--panel-blur: rgba(255, 255, 255, .72);--sidebar-bg: rgba(245, 245, 247, .85);--text: #1d1d1f;--text-2: #6e6e73;--text-3: #aeaeb2;--accent: #0a84ff;--accent-weak: rgba(10, 132, 255, .1);--bubble-user: linear-gradient(135deg, #0a84ff, #0069d9);--bubble-ai: #ffffff;--border: rgba(0, 0, 0, .08);--hover: rgba(0, 0, 0, .045);--danger: #ff3b30;--success: #34c759;--code-bg: #f5f5f7;--shadow: 0 1px 3px rgba(0, 0, 0, .06), 0 8px 24px rgba(0, 0, 0, .05);--radius: 18px}[data-theme=dark]{--bg: #1c1c1e;--panel: #2c2c2e;--panel-blur: rgba(44, 44, 46, .72);--sidebar-bg: rgba(28, 28, 30, .85);--text: #f5f5f7;--text-2: #98989d;--text-3: #636366;--accent: #0a84ff;--accent-weak: rgba(10, 132, 255, .18);--bubble-user: linear-gradient(135deg, #0a84ff, #0066cc);--bubble-ai: #2c2c2e;--border: rgba(255, 255, 255, .1);--hover: rgba(255, 255, 255, .06);--danger: #ff453a;--success: #30d158;--code-bg: #1c1c1e;--shadow: 0 1px 3px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, 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ease}.skin-title{font-size:11px;color:var(--text-3);margin-bottom:8px}.skin-dots{display:flex;gap:8px;margin-bottom:10px}.skin-dot{width:22px;height:22px;border-radius:50%;border:2px solid transparent;transition:transform .12s,border-color .12s}.skin-dot:hover{transform:scale(1.15)}.skin-dot.active{border-color:var(--text)}.skin-mode{width:100%;padding:8px;border-radius:9px;background:var(--hover);font-size:12.5px;color:var(--text-2)}.skin-mode:hover{background:var(--accent-weak);color:var(--accent)}.msg-image{display:block;max-width:240px;max-height:240px;border-radius:10px;margin-bottom:4px;cursor:zoom-in;object-fit:cover}.bubble.with-image{background:transparent;padding:0;border-bottom-right-radius:12px}.bubble.with-image:after{display:none}.attach-preview{position:relative;width:72px;margin-bottom:8px}.attach-preview img{width:72px;height:72px;object-fit:cover;border-radius:12px;border:1px solid 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