:root{--brand-1: #3370ff;--brand-2: #165dff;--brand-grad: linear-gradient(135deg, #3370ff, #165dff);--bg: #f5f6fa;--panel: #ffffff;--border: #e5e6eb;--text-1: #1f2329;--text-2: #86909c;--bubble-ai: #ffffff;--bubble-ai-border: #e5e6eb;--hover: #f2f3f5;--sidebar-1: #1e2530;--sidebar-2: #232d3d;--shadow-1: 0 1px 3px rgba(31, 35, 41, .08);--shadow-2: 0 6px 20px rgba(31, 35, 41, .1)}body.dark{--bg: #10141a;--panel: #1a1f28;--border: #2a313c;--text-1: #e8eaed;--text-2: #9aa4b2;--bubble-ai: #20262f;--bubble-ai-border: #2a313c;--sidebar-1: #0d1016;--sidebar-2: #151b24;--hover: #232a35;--shadow-1: 0 1px 3px rgba(0, 0, 0, .4);--shadow-2: 0 6px 20px rgba(0, 0, 0, .5)}*{box-sizing:border-box}html,body,#app{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;color:var(--text-1);background:var(--bg);transition:background .3s,color .3s}.app-container{display:flex;height:100vh;overflow:hidden}.sidebar{width:288px;flex-shrink:0;background:linear-gradient(180deg,var(--sidebar-1),var(--sidebar-2));color:#dfe4ec;display:flex;flex-direction:column;padding:20px 16px;gap:14px;overflow-y:auto}.profile{display:flex;align-items:flex-start;gap:12px;padding:14px;background:#ffffff0f;border:1px solid rgba(255,255,255,.08);border-radius:14px;transition:background .2s,border-color .2s,box-shadow .2s}.profile:hover{background:#ffffff1a;border-color:#ffffff2e;box-shadow:0 4px 16px #00000040}.avatar-wrap{position:relative;flex-shrink:0}.avatar{width:44px;height:44px;border-radius:50%;background:var(--brand-grad);color:#fff;font-size:18px;font-weight:600;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 8px #165dff66;border:2px solid rgba(255,255,255,.14)}.online-dot{position:absolute;right:-2px;bottom:-2px;width:12px;height:12px;background:#00d672;border-radius:50%;border:2px solid var(--sidebar-1);box-shadow:0 0 6px #00d67299;animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,to{box-shadow:0 0 6px #00d67299}50%{box-shadow:0 0 10px #00d672e6}}.profile-info{flex:1;min-width:0}.profile-name{font-size:15px;font-weight:600;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.profile-sub{font-size:11px;color:#8f9ab0;margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.profile-tags{display:flex;flex-wrap:wrap;align-items:center;gap:5px;margin-top:8px}.tag-label{font-size:10px;color:#8f9ab0;white-space:nowrap}.tag{display:inline-flex;align-items:center;gap:3px;font-size:10px;padding:2px 8px;border-radius:999px;border:1px solid rgba(255,255,255,.22);background:#ffffff0a;color:#c3cbd8;white-space:nowrap}.tag-ico{font-size:9px;opacity:.9}.profile-contacts{display:flex;flex-direction:column;align-items:flex-start;gap:5px;margin-top:8px}.contact-btn{display:inline-flex;align-items:center;gap:5px;max-width:100%;padding:3px 9px;border:1px solid rgba(255,255,255,.16);background:#ffffff0a;border-radius:7px;font-size:11px;color:#c3cbd8;cursor:pointer;transition:all .15s;white-space:nowrap;overflow:hidden;font-family:inherit}.contact-ico{font-size:11px;flex-shrink:0}.contact-text{overflow:hidden;text-overflow:ellipsis}.contact-btn:hover{background:var(--brand-grad);border-color:transparent;color:#fff;transform:translateY(-1px);box-shadow:0 2px 8px #165dff66}.contact-btn:active{transform:translateY(0)}.btn-new{width:100%;padding:11px;border:none;border-radius:10px;background:var(--brand-grad);color:#fff;font-size:14px;font-weight:500;cursor:pointer;box-shadow:0 4px 12px #165dff59;transition:transform .15s,box-shadow .15s}.btn-new:hover{transform:translateY(-1px);box-shadow:0 6px 16px #165dff73}.btn-new:disabled{opacity:.5;cursor:not-allowed;transform:none}.section-title{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:#77829a;margin:6px 2px 2px}.session-list{display:flex;flex-direction:column;gap:6px;flex:1}.session-item{display:flex;align-items:center;gap:8px;padding:9px 10px;border-radius:10px;font-size:13px;color:#c3cbd8;cursor:pointer;transition:background .15s}.session-item:hover{background:#ffffff14}.session-item.active{background:#3370ff38;color:#fff}.session-ico{font-size:13px}.session-name{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;-webkit-user-select:none;user-select:none}.session-del{opacity:.5;font-size:12px;border:none;background:transparent;color:#ff7875;cursor:pointer;padding:2px 7px;border-radius:5px;transition:opacity .15s,background .15s;flex-shrink:0}.session-del:hover{opacity:1;background:#ff78752e}.session-del:disabled{opacity:.25;cursor:not-allowed}.chat{flex:1;display:flex;flex-direction:column;min-width:0;background:var(--panel)}.chat-header{display:flex;align-items:center;justify-content:space-between;padding:14px 26px;border-bottom:1px solid var(--border);background:var(--panel)}.chat-header h1{margin:0;font-size:18px;font-weight:600}.current-session{font-size:12px;color:var(--text-2);margin-left:10px}.theme-btn{border:1px solid var(--border);background:var(--hover);color:var(--text-1);border-radius:9px;padding:6px 12px;font-size:13px;cursor:pointer;transition:all .15s}.theme-btn:hover{border-color:var(--brand-1)}.messages{flex:1;overflow-y:auto;padding:26px 26px 10px;display:flex;flex-direction:column;gap:16px}.hero{background:var(--brand-grad);color:#fff;border-radius:16px;padding:20px 22px;box-shadow:0 8px 24px #165dff4d}.hero h2{font-size:17px;font-weight:600;margin:0 0 6px}.hero p{font-size:13px;line-height:1.7;margin:0;opacity:.95}.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.quick{background:var(--bubble-ai);border:1px solid var(--border);border-radius:12px;padding:12px;cursor:pointer;text-align:left;font-family:inherit;transition:transform .15s,box-shadow .15s,border-color .15s;box-shadow:var(--shadow-1)}.quick:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--brand-1)}.quick .q-ico{font-size:18px}.quick .q-title{font-size:13px;font-weight:600;margin-top:6px;color:var(--text-1)}.quick .q-desc{font-size:11px;color:var(--text-2);margin-top:3px;line-height:1.5}.msg-row{display:flex;gap:10px;max-width:84%}.msg-row.user{align-self:flex-end;flex-direction:row-reverse}.msg-row.assistant{align-self:flex-start}.msg-avatar{width:34px;height:34px;border-radius:50%;background:var(--brand-grad);color:#fff;font-size:14px;font-weight:600;display:flex;align-items:center;justify-content:center;flex-shrink:0}.msg-row.user .msg-avatar{background:#4b5563;font-size:12px}.bubble{padding:11px 15px;border-radius:14px;font-size:14px;line-height:1.75;word-break:break-word;white-space:pre-wrap}.msg-row.assistant .bubble{background:var(--bubble-ai);border:1px solid var(--bubble-ai-border);border-top-left-radius:3px;box-shadow:var(--shadow-1)}.msg-row.user .bubble{background:var(--brand-grad);color:#fff;border-top-right-radius:3px;box-shadow:0 4px 12px #165dff40}.bubble h1,.bubble h2,.bubble h3,.bubble h4{font-size:14px;margin:8px 0 4px}.bubble p{margin:4px 0}.bubble ul,.bubble ol{margin:4px 0 4px 18px;padding:0}.bubble code{background:var(--hover);border:1px solid var(--border);border-radius:4px;padding:1px 5px;font-size:12px;white-space:pre-wrap}.bubble pre{background:#10141a;color:#d6e2f0;border-radius:8px;padding:10px 12px;margin:8px 0;overflow-x:auto;font-size:12px}.bubble pre code{background:transparent;border:none;padding:0}.bubble a{color:var(--brand-1)}.msg-row.user .bubble a{color:#fff}.msg-meta{display:flex;align-items:center;gap:8px;margin-top:4px;font-size:11px;color:var(--text-2)}.msg-row.user .msg-meta{justify-content:flex-end}.msg-meta .copy{cursor:pointer;opacity:0;border:none;background:transparent;color:inherit;font-size:11px;transition:opacity .15s}.msg-row:hover .msg-meta .copy{opacity:.8}.cursor{display:inline-block;width:8px;height:15px;background:var(--brand-1);vertical-align:-2px;margin-left:2px;border-radius:2px;animation:blink 1s steps(2) infinite}@keyframes blink{50%{opacity:0}}.input-bar{display:flex;align-items:center;gap:10px;padding:14px 26px 12px;background:var(--panel);border-top:1px solid var(--border)}.input-wrap{flex:1;display:flex;align-items:center;gap:10px;border:1.5px solid var(--border);border-radius:12px;padding:0 14px;background:var(--bubble-ai);transition:border-color .2s,box-shadow .2s}.input-wrap:focus-within{border-color:var(--brand-1);box-shadow:0 0 0 3px #3370ff26}.input{flex:1;border:none;outline:none;background:transparent;font-size:14px;color:var(--text-1);padding:12px 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