.sanqi-wrapper{display:flex;height:calc(100vh - 4rem);overflow:hidden;background:var(--bg-primary)}.gate{flex:1;display:flex;align-items:center;justify-content:center;padding:2rem}.gate-card{max-width:28rem;width:100%;padding:2.5rem 2rem;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);text-align:center}.gate-icon{width:3rem;height:3rem;margin:0 auto 1rem;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;background:var(--accent-soft);color:var(--accent)}.gate-title{font-size:1.25rem;font-weight:600;color:var(--text-primary);margin:0 0 .5rem}.gate-text{color:var(--text-secondary);font-size:.875rem;line-height:1.6;margin:0}.gate-btn{display:inline-block;margin-top:1.5rem;padding:.5rem 1.25rem;background:var(--gradient-accent);color:#fff;border-radius:var(--radius);text-decoration:none;font-size:.875rem;font-weight:600}.sanqi-sidebar{width:260px;flex-shrink:0;background:var(--bg-secondary);display:flex;flex-direction:column;border-right:1px solid var(--border)}.sidebar-header{padding:1rem;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}.sidebar-title{font-size:.95rem;font-weight:600;color:var(--text-primary)}.new-chat-btn{font-size:.75rem;padding:.375rem .75rem;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-card);color:var(--accent);cursor:pointer}.new-chat-btn:hover{background:var(--accent-soft)}.session-list{flex:1;overflow-y:auto;padding:.5rem}.session-item{display:flex;align-items:center;padding:.625rem .75rem;margin-bottom:.375rem;border-radius:var(--radius);background:var(--bg-card);border:1px solid var(--border);cursor:pointer}.session-item:hover{border-color:var(--accent)}.session-item.active{background:var(--accent-soft);border-color:var(--accent)}.session-item-content{flex:1;min-width:0}.session-item-title{font-size:.8125rem;font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.session-item-time{font-size:.6875rem;color:var(--text-muted);margin-top:.125rem}.session-delete-btn{background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:.75rem;padding:0 0 0 .5rem}.session-delete-btn:hover{color:var(--danger)}.session-list-empty{text-align:center;color:var(--text-muted);font-size:.8125rem;padding:2rem 0}.sanqi-main{flex:1;display:flex;flex-direction:column;overflow:hidden}.sanqi-header{padding:.875rem 1.25rem;border-bottom:1px solid var(--border);background:var(--bg-secondary);display:flex;align-items:center;gap:.75rem}.sanqi-avatar{width:2rem;height:2rem;border-radius:50%;background:linear-gradient(135deg,#475569,#1e293b);display:flex;align-items:center;justify-content:center;color:#fff;font-size:.875rem;font-weight:600}.sanqi-name{font-size:.95rem;font-weight:600;color:var(--text-primary)}.sanqi-subtitle{font-size:.75rem;color:var(--text-muted)}.messages-area{flex:1;overflow-y:auto;padding:1.5rem}.msg-wrapper{margin-bottom:1.25rem;display:flex;flex-direction:column}.msg-wrapper.user{align-items:flex-end}.msg-wrapper.assistant{align-items:flex-start}.msg-bubble{max-width:75%;padding:.75rem 1rem;border-radius:1rem;font-size:.9375rem;line-height:1.6;word-break:break-word}.msg-wrapper.user .msg-bubble{background:var(--gradient-accent);color:#fff;border-bottom-right-radius:.25rem}.msg-wrapper.assistant .msg-bubble{background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border);border-bottom-left-radius:.25rem}.msg-bubble p{margin:0}.msg-bubble p+p{margin-top:.5rem}.msg-time{font-size:.6875rem;color:var(--text-muted);margin-top:.25rem}.typing-indicator{display:inline-flex;align-items:center;gap:.25rem;padding:.75rem 1rem;background:var(--bg-card);border:1px solid var(--border);border-radius:1rem 1rem 1rem .25rem}.typing-indicator span{width:.375rem;height:.375rem;background:var(--text-muted);border-radius:50%;animation:typing 1.4s infinite ease-in-out}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{transform:translateY(0);opacity:.4}30%{transform:translateY(-.25rem);opacity:1}}.error-bar{margin:0 1.5rem .75rem;padding:.625rem 1rem;background:#ef44441a;border:1px solid rgba(239,68,68,.3);border-radius:var(--radius);color:var(--danger);font-size:.875rem}.input-area{padding:1rem 1.5rem 1.25rem;border-top:1px solid var(--border);background:var(--bg-secondary)}.input-row{display:flex;gap:.75rem;align-items:flex-end}.chat-input{flex:1;padding:.625rem .875rem;background:var(--bg-card);border:1px solid var(--border);border-radius:.75rem;color:var(--text-primary);font-size:.9375rem;font-family:inherit;resize:none;max-height:128px;min-height:2.75rem}.chat-input:focus{outline:none;border-color:var(--accent)}.chat-input::-moz-placeholder{color:var(--text-muted)}.chat-input::placeholder{color:var(--text-muted)}.send-btn{padding:.625rem 1.25rem;background:var(--gradient-accent);color:#fff;border:none;border-radius:.75rem;font-size:.875rem;font-weight:600;cursor:pointer;white-space:nowrap}.send-btn:disabled{opacity:.5;cursor:not-allowed}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-muted);padding:2rem;text-align:center}.empty-state-title{font-size:1.125rem;font-weight:600;color:var(--text-secondary);margin-bottom:.5rem}.empty-state-text{font-size:.875rem;line-height:1.6}