:root{--color-primary: #f4571e;--color-primary-strong: #d8410c;--color-primary-soft: #ff8a5b;--color-primary-tint: #fff1e7;--color-accent: #22a06b;--color-accent-tint: #e8f7f0;--color-warning: #d97706;--color-warning-tint: #fdf3e3;--color-danger: #dc2626;--color-danger-tint: #fdecec;--color-bg: #fff8f3;--color-surface: #ffffff;--color-surface-alt: #fffaf6;--color-border: #f0e2d8;--color-border-strong: #e2cec0;--color-text: #2b2018;--color-text-soft: #6b5a4d;--color-text-muted: #9c8a7c;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 18px;--radius-pill: 999px;--shadow-sm: 0 1px 2px rgba(43, 32, 24, .06);--shadow-md: 0 6px 18px rgba(43, 32, 24, .08);--shadow-lg: 0 18px 44px rgba(43, 32, 24, .12);--sidebar-width: 288px;--header-height: 68px;--transition: .18s ease;--font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Segoe UI", system-ui, 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28px 34px}}.chat-body{height:100vh;overflow:hidden}.app{display:grid;grid-template-columns:var(--sidebar-width) 1fr;height:100vh;transition:grid-template-columns var(--transition)}.app.is-sidebar-collapsed{grid-template-columns:0 1fr}.app.is-sidebar-collapsed .sidebar{overflow:hidden}.sidebar{display:flex;flex-direction:column;min-width:0;background:var(--color-surface);border-right:1px solid var(--color-border)}.sidebar__head{display:flex;align-items:center;justify-content:space-between;height:var(--header-height);padding:0 16px;border-bottom:1px solid var(--color-border)}.sidebar__brand{display:flex;align-items:center;gap:9px}.sidebar__logo{width:30px;height:30px}.sidebar__name{font-size:15px;font-weight:700;letter-spacing:.4px}.sidebar__collapse{width:32px;height:32px;border-radius:var(--radius-sm);color:var(--color-text-soft);font-size:17px;transition:background var(--transition)}.sidebar__collapse:hover{background:var(--color-primary-tint);color:var(--color-primary-strong)}.sidebar__new{margin:14px 16px 10px;width:auto}.sidebar__new-plus{font-size:16px;line-height:1}.sidebar__search{padding:0 16px 10px}.sidebar__search-input{width:100%;padding:9px 12px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface-alt);font-size:13px}.sidebar__search-input:focus{outline:none;border-color:var(--color-primary-soft);background:var(--color-surface)}.conversation-list{flex:1;min-height:0;overflow-y:auto;padding:4px 10px 12px;scrollbar-width:thin;scrollbar-color:var(--color-border-strong) transparent}.conversation-list::-webkit-scrollbar{width:7px}.conversation-list::-webkit-scrollbar-thumb{background:var(--color-border-strong);border-radius:var(--radius-pill)}.conversation-item{position:relative;display:flex;align-items:center;gap:10px;padding:11px 10px;margin-bottom:4px;border-radius:var(--radius-md);border:1px 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var(--color-border)}.topbar__menu{display:none;width:34px;height:34px;border-radius:var(--radius-sm);font-size:18px;color:var(--color-text-soft)}.topbar__meta{flex:1;min-width:0}.topbar__title{font-size:16px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.topbar__sub{font-size:12.5px;color:var(--color-text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.topbar__status{display:flex;align-items:center;gap:7px;flex:none;padding:6px 12px;border-radius:var(--radius-pill);background:var(--color-surface-alt);border:1px solid var(--color-border);font-size:12px;color:var(--color-text-soft)}.status-dot{width:8px;height:8px;border-radius:50%;background:var(--color-text-muted)}.topbar__status[data-state=connecting] .status-dot{background:var(--color-warning);animation:pulse 1.1s ease-in-out infinite}.topbar__status[data-state=streaming] .status-dot{background:var(--color-primary);animation:pulse .9s ease-in-out infinite}.topbar__status[data-state=done] .status-dot{background:var(--color-accent)}.topbar__status[data-state=error] .status-dot{background:var(--color-danger)}.topbar__status[data-state=connecting],.topbar__status[data-state=streaming],.topbar__status[data-state=done],.topbar__status[data-state=error]{color:var(--color-text)}@keyframes pulse{0%,to{box-shadow:0 0 #f4571e73}50%{box-shadow:0 0 0 6px #f4571e00}}.messages{flex:1;min-height:0;overflow-y:auto;padding:26px 26px 8px;scroll-behavior:smooth;scrollbar-width:thin;scrollbar-color:var(--color-border-strong) transparent}.messages::-webkit-scrollbar{width:8px}.messages::-webkit-scrollbar-thumb{background:var(--color-border-strong);border-radius:var(--radius-pill)}.messages__inner{max-width:860px;margin:0 auto}.empty-state{max-width:520px;margin:6vh auto 0;text-align:center}.empty-state__art{width:200px;margin:0 auto 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var(--color-border);box-shadow:var(--shadow-sm);font-size:14.5px;line-height:1.75;word-break:break-word;white-space:pre-wrap}.message--user .message__bubble{background:var(--color-primary);border-color:var(--color-primary);color:#fff;border-top-right-radius:6px}.message--assistant .message__bubble{border-top-left-radius:6px}.message__image{display:block;max-width:240px;max-height:240px;border-radius:var(--radius-md);object-fit:cover;margin-bottom:8px;border:1px solid var(--color-border)}.message__badge{display:inline-flex;align-items:center;gap:5px;margin-bottom:6px;padding:2px 9px;border-radius:var(--radius-pill);background:var(--color-accent-tint);color:var(--color-accent);font-size:11.5px;font-weight:600}.message__disclaimer{margin-top:8px;padding-top:8px;border-top:1px dashed var(--color-border-strong);font-size:12px;color:var(--color-text-muted)}.message__meta{margin-top:5px;font-size:11.5px;color:var(--color-text-muted)}.message--user 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