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.item-icon{color:var(--brand-color,#ff6b00)}.item-body{flex:1;min-width:0}.item-title{color:var(--text-primary,#1d1d1f);white-space:nowrap;text-overflow:ellipsis;margin-bottom:2px;font-size:13px;overflow:hidden}.item-meta{color:var(--text-secondary,#999);font-size:11px}.item-del{color:var(--text-secondary,#999);cursor:pointer;opacity:0;background:0 0;border:none;padding:2px;transition:opacity .15s}.sidebar-item:hover .item-del{opacity:1}.item-del:hover{color:#ff4d4f}.chat-main{background:var(--bg-layout,#fafafa);flex-direction:column;flex:1;min-width:0;display:flex}[data-theme=dark] .chat-main{background:#0b1222}.chat-scroll{scroll-behavior:smooth;flex:1;padding:24px 0;overflow-y:auto}.chat-welcome{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:12px;min-height:60vh;padding:40px 20px;display:flex}.brand-logo-large{border-radius:16px;width:72px;height:72px;margin-bottom:8px}.chat-welcome h1{color:var(--text-primary);margin:0;font-size:28px;font-weight:600}.chat-welcome p{color:var(--text-secondary);margin:0 0 12px;font-size:14px}.welcome-prompts{flex-wrap:wrap;justify-content:center;gap:8px;max-width:600px;display:flex}.welcome-prompt{background:var(--bg-card);border:1px solid var(--border-color);cursor:pointer;color:var(--text-primary);border-radius:20px;padding:8px 16px;font-size:13px;transition:all .2s}.welcome-prompt:hover{border-color:var(--brand-color);color:var(--brand-color);transform:translateY(-1px)}.msg-row{max-width:840px;margin:0 auto;padding:16px 24px;display:flex}.msg-row.user{justify-content:flex-end}.user-bubble{background:var(--brand-color,#ff6b00);color:#fff;white-space:pre-wrap;word-wrap:break-word;border-radius:18px 18px 4px;max-width:80%;padding:10px 16px;font-size:14px;line-height:1.6}.msg-row.ai{justify-content:flex-start;align-items:flex-start;gap:12px}.ai-logo{border-radius:8px;flex-shrink:0;width:28px;height:28px;margin-top:2px}.ai-body{flex:1;min-width:0;max-width:calc(100% - 44px)}.chat-input-area{width:100%;max-width:840px;margin:0 auto;padding:16px 24px 20px}.chat-input-hint{color:var(--text-secondary);text-align:center;margin-top:8px;font-size:11px}@media (width<=768px){.chat-sidebar{display:none}.msg-row{padding:12px}.ai-logo{width:24px;height:24px}.msg-row.ai{gap:8px}.user-bubble{max-width:88%;font-size:14px}.chat-input-area{padding:12px}.chat-welcome h1{font-size:22px}.brand-logo-large{width:56px;height:56px}.md-body table{font-size:12px}.md-body table th,.md-body table td{padding:6px 8px}}.welcome-hero{margin-bottom:8px;display:inline-block;position:relative}.wave-hand{transform-origin:70% 70%;font-size:32px;animation:2.4s ease-in-out infinite wave;display:inline-block;position:absolute;bottom:-4px;right:-16px}@keyframes wave{0%,60%,to{transform:rotate(0)}10%,30%{transform:rotate(14deg)}20%{transform:rotate(-8deg)}40%{transform:rotate(14deg)}50%{transform:rotate(-4deg)}}.welcome-prompt.hot{background:var(--bg-card);border:1px solid var(--border-color);cursor:pointer;color:var(--text-primary);text-align:left;border-radius:14px;align-items:center;gap:8px;max-width:280px;padding:10px 14px;font-size:13px;transition:all .2s;display:inline-flex}.welcome-prompt.hot:hover{border-color:var(--brand-color);background:var(--brand-light);transform:translateY(-2px);box-shadow:0 4px 12px #ff6b001f}.prompt-icon{flex-shrink:0;font-size:16px}.prompt-text{white-space:nowrap;text-overflow:ellipsis;flex:1;overflow:hidden}.prompt-tag{background:var(--brand-color);color:#fff;border-radius:10px;flex-shrink:0;padding:2px 8px;font-size:11px;font-weight:600}.welcome-loading{color:var(--text-secondary);padding:16px;font-size:13px}.welcome-tip{color:var(--text-secondary);opacity:.7;margin-top:16px;font-size:11px}.welcome-wave-hand{transform-origin:70% 70%;pointer-events:none;z-index:2;font-size:28px;animation:2.4s ease-in-out infinite welcome-wave;display:inline-block;position:absolute;bottom:-8px;right:-14px}@keyframes welcome-wave{0%,60%,to{transform:rotate(0)}10%,30%{transform:rotate(14deg)}20%{transform:rotate(-8deg)}40%{transform:rotate(14deg)}50%{transform:rotate(-4deg)}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-backdrop-blur{syntax:"*";inherits:false}@property --tw-backdrop-brightness{syntax:"*";inherits:false}@property --tw-backdrop-contrast{syntax:"*";inherits:false}@property --tw-backdrop-grayscale{syntax:"*";inherits:false}@property --tw-backdrop-hue-rotate{syntax:"*";inherits:false}@property --tw-backdrop-invert{syntax:"*";inherits:false}@property --tw-backdrop-opacity{syntax:"*";inherits:false}@property --tw-backdrop-saturate{syntax:"*";inherits:false}@property --tw-backdrop-sepia{syntax:"*";inherits:false}@property --tw-ease{syntax:"*";inherits:false}@keyframes pulse{50%{opacity:.5}}