*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--nav-bg: #1e293b;--nav-text: #e2e8f0;--page-bg: #f1f5f9;--card-bg: #ffffff;--border: #e2e8f0;--text: #1e293b;--text-muted: #64748b;--primary: #2563eb;--primary-light: #dbeafe;--success: #16a34a;--success-bg: #dcfce7;--warning-bg: #fef9c3;--warning-border: #fde047;--shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 4px 12px rgba(15, 23, 42, .04);--radius: 12px;--radius-sm: 8px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--page-bg);color:var(--text);min-height:100vh;line-height:1.5}.top-nav{display:flex;align-items:center;justify-content:space-between;height:56px;padding:0 24px;background:var(--nav-bg);color:var(--nav-text)}.top-nav__left,.top-nav__right{display:flex;align-items:center;gap:20px}.brand{display:flex;align-items:center;gap:10px;font-weight:600;font-size:16px}.brand__icon{font-size:20px}.org-select{display:flex;align-items:center;gap:6px;padding:6px 12px;background:#ffffff14;border-radius:6px;font-size:13px;cursor:pointer}.chevron{font-size:10px;opacity:.7}.nav-link{font-size:13px;cursor:pointer;opacity:.9}.nav-link:hover{opacity:1}.avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,#3b82f6,#8b5cf6);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;color:#fff}.layout{display:grid;grid-template-columns:260px minmax(0,1fr) 300px;grid-template-areas:"trips chat policy";gap:16px;padding:16px;height:calc(100vh - 56px);width:100%}.column--trips{grid-area:trips}.column--chat{grid-area:chat}.column--policy{grid-area:policy}.column{min-height:0;display:flex;flex-direction:column}.column-title{font-size:13px;font-weight:600;color:var(--text-muted)}.trips-toolbar{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:10px;padding-left:4px}.add-trip-btn{padding:5px 10px;border:1px solid var(--primary);border-radius:var(--radius-sm);background:#fff;color:var(--primary);font-size:11px;font-weight:600;cursor:pointer;white-space:nowrap;transition:background .15s,color .15s}.add-trip-btn:hover{background:var(--primary);color:#fff}.trip-search-wrap{margin-bottom:10px;padding:0 2px}.trip-search{width:100%;height:34px;padding:0 12px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:12px;outline:none;background:#fff}.trip-search:focus{border-color:var(--primary)}.trip-empty{padding:24px 12px;text-align:center;font-size:12px;color:var(--text-muted)}.trip-tabs{display:flex;flex-direction:column;gap:10px;overflow-y:auto;flex:1}.trip-card{position:relative;background:var(--card-bg);border:2px solid transparent;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:border-color .15s,box-shadow .15s}.trip-card--active{border-color:var(--primary)}.trip-card--preview-open{box-shadow:0 4px 16px #2563eb1f}.trip-card--dragging{opacity:.45}.trip-card--drag-over{border-color:#93c5fd;box-shadow:0 0 0 2px #2563eb26}.trip-card__drag-handle{position:absolute;top:10px;right:8px;width:22px;height:22px;display:flex;align-items:center;justify-content:center;font-size:14px;color:#cbd5e1;cursor:grab;border-radius:4px;z-index:2;-webkit-user-select:none;user-select:none}.trip-card__drag-handle:hover{color:var(--primary);background:var(--primary-light)}.trip-card__drag-handle:active{cursor:grabbing}.trip-tab{display:flex;flex-direction:column;gap:6px;width:100%;padding:14px 32px 10px 16px;background:transparent;border:none;cursor:pointer;text-align:left;transition:background .15s}.trip-card--active .trip-tab{background:var(--primary-light)}.trip-tab:hover{background:#f8fafc}.trip-card--active .trip-tab:hover{background:var(--primary-light)}.trip-tab__name{font-size:14px;font-weight:600;color:var(--text)}.trip-tab__top{display:flex;flex-direction:column;gap:2px}.trip-tab__no{font-size:10px;color:var(--text-muted);font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.trip-tab__route{font-size:12px;color:var(--text-muted);line-height:1.4}.trip-tab__meta{display:flex;align-items:center;justify-content:space-between;margin-top:2px}.trip-tab__date{font-size:11px;color:var(--text-muted)}.trip-tab__status{font-size:11px;padding:2px 8px;border-radius:999px;background:var(--success-bg);color:var(--success);font-weight:500}.trip-tab__status--draft{background:#fef3c7;color:#b45309}.trip-tab__status--pending{background:#ffedd5;color:#c2410c}.trip-tab__status--approved{background:#dbeafe;color:#1d4ed8}.trip-tab__status--active{background:var(--success-bg);color:var(--success)}.trip-card:not(.trip-card--preview-open) .trip-preview{display:none}.trip-preview{padding:0 12px 12px;border-top:1px solid var(--border);background:#fafbfc}.trip-card--active .trip-preview{background:#fff9}.trip-preview--empty{padding:10px 12px 12px}.trip-preview__empty{font-size:11px;color:var(--text-muted)}.trip-preview__label-title{display:flex;align-items:center;justify-content:space-between;font-size:11px;font-weight:600;color:var(--text-muted);padding:8px 4px 6px}.trip-preview__count{font-size:10px;font-weight:500;color:var(--primary);background:var(--primary-light);padding:1px 6px;border-radius:999px}.trip-preview__list{display:flex;flex-direction:column;gap:6px;overflow:hidden}.trip-preview__item{display:flex;align-items:flex-start;gap:6px;padding:6px 8px;background:#fff;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:11px;line-height:1.4;max-height:48px;opacity:1;transform:translateY(0);transition:max-height .25s ease,opacity .2s ease,transform .2s ease,margin .2s ease,padding .2s ease}.trip-preview__item--folded{max-height:0;opacity:0;transform:translateY(-4px);margin-top:-6px;padding-top:0;padding-bottom:0;border-width:0;overflow:hidden;pointer-events:none}.trip-preview__day{flex-shrink:0;min-width:28px;font-weight:600;color:var(--primary)}.trip-preview__icon{flex-shrink:0;font-size:12px;line-height:1.3}.trip-preview__text{display:flex;flex-direction:column;gap:1px;min-width:0}.trip-preview__label{font-weight:600;color:var(--text)}.trip-preview__detail{color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.trip-preview__toggle{display:flex;align-items:center;justify-content:center;gap:4px;width:100%;margin-top:8px;padding:6px 8px;border:1px dashed #bfdbfe;border-radius:var(--radius-sm);background:#fff;font-size:11px;color:var(--primary);cursor:pointer;transition:background .15s,border-color .15s}.trip-preview__toggle:hover{background:var(--primary-light);border-color:var(--primary)}.trip-preview__toggle--expanded{border-style:solid;background:#f8fafc}.trip-preview__toggle-icon{font-size:9px;line-height:1}.chat-panel{display:flex;flex-direction:column;background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;flex:1;min-height:0}.trip-header{padding:16px 20px;border-bottom:1px solid var(--border);background:linear-gradient(180deg,#f8fafc,#fff)}.trip-header__title{font-size:16px;font-weight:700;margin-bottom:8px}.trip-header__info{display:flex;flex-wrap:wrap;gap:16px;font-size:13px;color:var(--text-muted);margin-bottom:12px}.trip-header__info span{display:flex;align-items:center;gap:4px}.trip-header__bookings{display:flex;flex-direction:column;gap:6px}.trip-header__bookings-label{font-size:12px;font-weight:600;color:var(--text-muted);margin-bottom:2px}.booking-tag{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:var(--radius-sm);font-size:12px;color:#166534;width:fit-content}.booking-tag--empty{background:#f8fafc;border-color:var(--border);color:var(--text-muted)}.chat-body{flex:1;display:flex;flex-direction:column;min-height:0;padding:16px 20px 0}.chat-title{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;margin-bottom:16px;flex-shrink:0}.status-dot{width:8px;height:8px;border-radius:50%;background:var(--success);animation:pulse 2s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.chat-messages{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:16px;padding-bottom:16px}.msg{display:flex;gap:10px;max-width:85%}.msg--ai{align-self:flex-start}.msg--user{align-self:flex-end;flex-direction:row-reverse}.msg__avatar{width:32px;height:32px;border-radius:50%;background:#e0e7ff;display:flex;align-items:center;justify-content:center;font-size:14px;flex-shrink:0}.msg--user .msg__avatar{background:var(--primary-light)}.msg__bubble{padding:12px 16px;border-radius:12px;font-size:14px;line-height:1.6}.msg--ai .msg__bubble{background:#f8fafc;border:1px solid var(--border);border-top-left-radius:4px}.msg--user .msg__bubble{background:var(--primary);color:#fff;border-top-right-radius:4px}.flight-card{margin-top:10px;padding:12px;background:#fff;border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text)}.flight-card__route{display:flex;align-items:center;justify-content:space-between;gap:12px}.flight-card__time{font-size:18px;font-weight:700}.flight-card__airport{font-size:11px;color:var(--text-muted);margin-top:2px}.flight-card__arrow{flex:1;text-align:center;font-size:12px;color:var(--text-muted)}.booking-card{margin-top:10px;padding:12px;background:#fff;border:1px solid #bbf7d0;border-radius:var(--radius-sm);color:var(--text)}.booking-card__type{font-size:11px;color:var(--success);font-weight:600;margin-bottom:4px}.booking-card__detail{font-size:13px;font-weight:500}.chat-footer{padding:12px 20px 16px;border-top:1px solid var(--border);background:#fafafa}.quick-actions{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}.pill-btn{padding:6px 14px;border:1px solid var(--border);border-radius:999px;background:#fff;font-size:12px;color:var(--text);cursor:pointer;transition:background .15s,border-color .15s}.pill-btn:hover{background:var(--primary-light);border-color:#93c5fd}.input-row{display:flex;align-items:center;gap:10px}.icon-btn{width:36px;height:36px;border:1px solid var(--border);border-radius:var(--radius-sm);background:#fff;cursor:pointer;font-size:16px;flex-shrink:0}.chat-input{flex:1;height:40px;padding:0 14px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:14px;outline:none;transition:border-color .15s}.chat-input:focus{border-color:var(--primary)}.send-btn{height:40px;padding:0 20px;border:none;border-radius:var(--radius-sm);background:var(--primary);color:#fff;font-size:14px;font-weight:500;cursor:pointer;flex-shrink:0;transition:background .15s}.send-btn:hover{background:#1d4ed8}.column--policy{gap:12px;overflow-y:auto}.policy-card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}.policy-card--compact{padding:16px}.policy-card__title{font-size:14px;font-weight:700;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--border)}.policy-section{margin-bottom:14px}.policy-section__label{font-size:13px;font-weight:600;margin-bottom:4px}.policy-section p{font-size:12px;color:var(--text-muted);line-height:1.6}.policy-alert{padding:12px;background:var(--warning-bg);border:1px solid var(--warning-border);border-radius:var(--radius-sm);margin-top:4px}.policy-alert strong{display:block;font-size:12px;margin-bottom:4px}.policy-alert p{font-size:12px;color:#713f12;line-height:1.5}.pref-row{display:flex;justify-content:space-between;align-items:center;padding:8px 0;border-bottom:1px solid var(--border);font-size:13px}.pref-row:last-child{border-bottom:none}.pref-label{color:var(--text-muted)}.pref-value{font-weight:500}@media(max-width:1100px){.layout{grid-template-columns:220px minmax(0,1fr) 260px}}@media(max-width:900px){.layout{grid-template-columns:1fr;grid-template-areas:"trips" "chat" "policy";height:auto;min-height:calc(100vh - 56px)}.column--trips,.column--policy{max-height:none}.trip-tabs{flex-direction:row;overflow-x:auto;padding-bottom:4px}.trip-card{min-width:220px;flex-shrink:0}.trip-tab{min-width:180px;flex-shrink:0}.chat-panel{min-height:500px}}