:root{--fh-ink:#0f131a;--fh-white:#ffffff;--fh-card:#f7f8fa;--fh-line:#f2f3f5;--fh-muted:#919499;--fh-aux:#d2d4d9;--fh-user-bubble:#ebebff;--fh-cyan:#b3f7ff;--fh-rose:rgba(255,181,182,0.48);--fh-brand:#6366f1;--fh-bg:#f5f6fa;--fh-surface:#ffffff;--fh-low:#16a34a;--fh-low-bg:#ecfdf5;--fh-mid:#b45309;--fh-mid-bg:#fef9c3;--fh-high:#b91c1c;--fh-high-bg:#fee2e2;--fh-precise:#0369a1;--fh-precise-bg:#e0f2fe;--fh-explore:#0d9488;--fh-explore-bg:#ccfbf1;--fh-warn:#92400e;--fh-warn-bg:#fffbeb;--fh-warn-line:#fde68a;--fh-radius-sm:6px;--fh-radius-md:12px;--fh-radius-lg:18px;--fh-radius-pill:999px;--fh-space-xs:6px;--fh-space-sm:9px;--fh-space-md:12px;--fh-space-lg:15px;--fh-space-xl:18px;--fh-space-2xl:30px;--fh-motion-fast:150ms;--fh-motion-normal:300ms;--fh-motion-drawer:1000ms;--fh-ease-enter:cubic-bezier(0.4,0,0.2,1);--fh-ease-standard:cubic-bezier(0.4,0,0.2,1);--fh-font-stack:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Segoe 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var(--fh-line);border-radius:12px;padding:16px}.ob-q-header{display:flex;align-items:flex-start;gap:8px;margin-bottom:12px}.ob-q-emoji{font-size:20px;line-height:1}.ob-q-text{font-size:15px;font-weight:600;color:var(--fh-ink);line-height:1.5;flex:1}.ob-q-options{display:flex;flex-direction:column;gap:8px}.ob-q-option-btn{background:#fff;border:1.5px solid #e2e8f0;border-radius:8px;padding:12px 16px;font-size:14px;color:var(--fh-ink);text-align:left;cursor:pointer;transition:all .2s;line-height:1.5}.ob-q-option-btn:hover{border-color:var(--fh-ink);background:var(--fh-card)}.ob-q-option-btn:active{transform:translateX(2px)}.ob-user-row{display:flex;justify-content:flex-end;margin:8px 0}.ob-user-bubble{background:var(--fh-user-bubble);border-radius:16px 16px 4px 16px;max-width:80%;line-height:1.5}.ob-agent-bubble,.ob-user-bubble{color:var(--fh-ink);padding:10px 14px;font-size:14px}.ob-agent-bubble{background:var(--fh-card);border:1px solid var(--fh-line);border-radius:16px 16px 16px 4px;max-width:85%;line-height:1.6}.ob-summary-card{background:var(--fh-white);border:1px solid var(--fh-line);border-radius:var(--fh-radius-lg);padding:20px;margin-top:16px}.ob-summary-title{font-size:20px;font-weight:700;color:var(--fh-ink);margin-bottom:12px}.ob-summary-text{font-size:14px;color:var(--fh-ink);line-height:1.7;white-space:pre-line;margin-bottom:16px}.ob-start-btn:active{transform:translateY(0)}.pref-q-item{background:#f8fafc;border:1px solid #e2e8f0;border-radius:8px;padding:12px;margin-bottom:8px}.pref-question{font-size:13px;color:var(--fh-muted);margin-bottom:6px;line-height:1.5}.pref-answer{font-size:14px;color:var(--fh-ink);font-weight:500;line-height:1.5}.auth-page{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100%;padding:32px 20px 40px;background:var(--fh-bg)}.auth-logo{font-size:24px;font-weight:700;color:var(--fh-brand);letter-spacing:-.5px;margin-bottom:28px}.auth-card{width:100%;max-width:360px;background:#fff;border-radius:16px;box-shadow:0 4px 24px rgba(0,0,0,.08);overflow:hidden}.auth-tab-bar{display:flex;border-bottom:1px solid #e8ecf0}.auth-tab{flex:1;text-align:center;padding:14px 8px;font-size:14px;color:var(--fh-muted);cursor:pointer;transition:color .2s,border-bottom .2s;border-bottom:2px solid transparent;margin-bottom:-1px}.auth-tab.active{color:var(--fh-brand);border-bottom-color:var(--fh-brand);font-weight:600}.auth-body{padding:24px 20px}.auth-form{display:flex;flex-direction:column;gap:12px}.auth-input{width:100%;padding:12px 14px;border:1px solid #dde1e7;border-radius:10px;font-size:15px;color:var(--fh-ink);background:#f8fafc;outline:none;box-sizing:border-box;transition:border-color .2s,background .2s}.auth-input:focus{border-color:var(--fh-brand);background:#fff}.auth-btn{padding:13px 16px;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;border:none;transition:opacity .2s,transform .1s}.auth-btn:active{transform:translateY(1px)}.auth-btn:disabled{opacity:.55;cursor:not-allowed}.auth-btn.primary{background:var(--fh-brand);color:#fff}.auth-btn.otp-send{background:#f0f4ff;color:var(--fh-brand);white-space:nowrap;font-size:13px;padding:0 14px;flex-shrink:0}.auth-otp-row{display:flex;gap:10px;align-items:stretch}.auth-otp-input{flex:1}.auth-hint{font-size:12px;color:var(--fh-muted);line-height:1.5}.auth-skip{margin-top:20px;font-size:13px;color:var(--fh-muted);text-align:center;cursor:pointer;text-decoration:underline;text-underline-offset:3px}.auth-skip:active{opacity:.6}.price-alert-dot{position:absolute;top:-2px;right:-2px;width:9px;height:9px;border-radius:50%;background:#ff3b30;border:1.5px solid #fff;pointer-events:none}.me-monitor-triggered-badge{display:inline-block;font-size:10px;font-weight:600;color:#fff;background:#ff3b30;border-radius:var(--fh-radius-sm);padding:1px 6px;margin-left:6px;vertical-align:middle;letter-spacing:.2px;flex-shrink:0}.me-monitor-footer{display:flex;align-items:center;justify-content:space-between;margin-top:6px}.me-monitor-cancel-btn{border:1px solid var(--fh-line);background:transparent;color:var(--fh-muted);font-size:11.5px;border-radius:var(--fh-radius-sm);padding:3px 10px;cursor:pointer;transition:background var(--fh-motion-fast),color var(--fh-motion-fast)}.me-monitor-cancel-btn:hover{background:var(--fh-bg);color:var(--fh-ink)}.me-monitor-cancel-btn:disabled{opacity:.5;cursor:not-allowed}.pm-card{background:var(--fh-surface);border:1.5px solid var(--fh-line);border-radius:var(--fh-radius-md);padding:14px 16px 12px;margin:8px 0;font-size:13px;line-height:1.6}.pm-card-pending{border-color:var(--fh-brand)}.pm-card-active{border-color:#22c55e}.pm-card-title{display:flex;align-items:center;gap:6px;font-weight:600;font-size:14px;margin-bottom:8px;color:var(--fh-ink)}.pm-card-icon{font-size:16px;flex-shrink:0}.pm-card-status-badge{margin-left:auto;font-size:11px;font-weight:600;color:#fff;background:#22c55e;border-radius:999px;padding:2px 8px;flex-shrink:0}.pm-card-row{color:var(--fh-muted);margin-bottom:3px;font-size:12.5px}.pm-card-price-row{display:flex;align-items:baseline;gap:6px;margin-bottom:3px}.pm-card-label{color:var(--fh-muted);font-size:12.5px}.pm-card-current-price{font-weight:600;color:var(--fh-ink)}.pm-card-target-price{font-weight:700;color:var(--fh-brand);font-size:15px}.pm-card-rule{font-size:12px}.pm-card-note,.pm-card-rule{color:var(--fh-muted);margin-top:4px}.pm-card-note{font-size:11.5px;font-style:italic}.pm-card-btn-row{margin-top:12px;text-align:center}.pm-card-confirm-btn{background:var(--fh-brand);color:#fff;border:none;border-radius:var(--fh-radius-md);padding:9px 28px;font-size:13.5px;font-weight:600;cursor:pointer;width:100%;transition:opacity var(--fh-motion-fast)}.pm-card-confirm-btn:disabled{opacity:.5;cursor:not-allowed}.pm-card-confirm-btn:not(:disabled):hover{opacity:.88}.pi-comparison-card{background:var(--fh-surface);border-radius:var(--fh-radius-md);padding:14px;margin:10px 0;border:1px solid var(--fh-line)}.pi-comparison-title{font-size:14px;font-weight:600;color:var(--fh-text);margin-bottom:4px}.pi-card-context{font-size:12px;color:var(--fh-muted);margin-bottom:10px;padding:4px 0;border-bottom:1px dashed var(--fh-border,#e5e7eb)}.pi-comparison-table{width:100%;border-collapse:collapse;font-size:13px}.pi-comparison-table th{text-align:left;padding:6px 8px;color:var(--fh-text-dim);font-weight:500;border-bottom:1px solid var(--fh-line)}.pi-comparison-table td{padding:8px;border-bottom:1px solid var(--fh-line-light,#f0f0f0)}.pi-comparison-best td{background:rgba(52,199,89,.06)}.pi-comparison-price{font-weight:600}.pi-comparison-lowest{color:#34c759}.pi-comparison-hint{margin-top:10px;font-size:12px;color:var(--fh-text-dim);padding:6px 10px;background:rgba(52,199,89,.06);border-radius:6px}.pi-card{background:var(--fh-surface);border-radius:var(--fh-radius-md);padding:16px;margin:10px 0;border:1px solid var(--fh-line);box-shadow:0 1px 3px rgba(0,0,0,.06)}.pi-title{font-size:15px;font-weight:700;color:var(--fh-ink)}.pi-title-row{display:flex;align-items:center;gap:8px;margin-bottom:12px;flex-wrap:wrap}.pi-route{font-size:13px;font-weight:600;color:var(--fh-accent)}.pi-trip-type{font-size:12px;color:var(--fh-muted);background:var(--fh-line);border-radius:4px;padding:1px 6px}.pi-level{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;padding:8px 12px;border-radius:var(--fh-radius-sm);margin-bottom:12px}.pi-level-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}.pi-level-low{background:var(--fh-low-bg);color:var(--fh-low)}.pi-level-low .pi-level-dot{background:var(--fh-low)}.pi-level-typical{background:var(--fh-mid-bg);color:var(--fh-mid)}.pi-level-typical .pi-level-dot{background:var(--fh-mid)}.pi-level-high{background:var(--fh-high-bg);color:var(--fh-high)}.pi-level-high .pi-level-dot{background:var(--fh-high)}.pi-typical-range{font-size:12px;font-weight:400;opacity:.8;margin-left:auto}.pi-section{margin-bottom:12px}.pi-section-title{font-size:12.5px;font-weight:600;color:var(--fh-muted);margin-bottom:6px}.pi-sparkline-wrap{position:relative;width:100%;height:74px;margin:4px 0}.pi-sparkline{width:100%;height:100%;display:block;overflow:visible}.pi-sparkline-label{position:absolute;right:2px;font-size:10px;color:var(--fh-muted);font-weight:500;background:rgba(255,255,255,.85);padding:0 2px;border-radius:2px}.pi-sparkline-high{top:0}.pi-sparkline-low{bottom:18px}.pi-sparkline-xaxis{display:flex;justify-content:space-between;font-size:10px;color:var(--fh-muted);margin-top:2px;padding:0 4px}.pi-sparkline-current{font-weight:600;color:var(--fh-low,#e65100)}.pi-calendar{margin:12px 0}.pi-calendar-title{font-size:12.5px;font-weight:600;color:var(--fh-muted);margin-bottom:6px}.pi-chart-svg{width:100%;height:80px;display:block}.pi-chart-label{font-size:9px;fill:var(--fh-muted,#888)}.pi-chart-min{fill:#16a34a;font-weight:700}.pi-cheapest-callout{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--fh-low);background:var(--fh-low-bg);padding:8px 12px;border-radius:var(--fh-radius-sm);margin:10px 0}.pi-cheapest-callout strong{font-weight:700}.pi-cheapest-icon{font-size:15px;flex-shrink:0}.pi-advice{margin-top:10px;padding:10px 12px;background:var(--fh-card);border-radius:var(--fh-radius-sm);border-left:3px solid var(--fh-brand)}.pi-advice-title{font-size:12.5px;font-weight:600;color:var(--fh-brand);margin-bottom:4px}.pi-advice-text{font-size:13px;color:var(--fh-ink);line-height:1.6}.tradeoff-card{background:var(--fh-surface);border-radius:var(--fh-radius-md);padding:16px;margin:10px 0;border:1px solid var(--fh-line);box-shadow:0 1px 3px rgba(0,0,0,.06)}.tradeoff-title{font-size:15px;font-weight:700;color:var(--fh-ink);margin-bottom:12px}.tradeoff-list{display:flex;flex-direction:column;gap:12px}.tradeoff-item{padding:10px 12px;border-radius:var(--fh-radius-sm,8px);background:var(--fh-bg,#f8f9fa);border:1px solid var(--fh-line)}.tradeoff-item-header{display:flex;align-items:center;gap:8px;margin-bottom:6px}.tradeoff-dim-tag{font-size:13px;font-weight:600;color:var(--fh-ink)}.tradeoff-badge{font-size:12px;font-weight:700;padding:2px 8px;border-radius:10px;white-space:nowrap}.tradeoff-badge-positive{background:rgba(16,185,129,.1);color:var(--fh-low,#059669)}.tradeoff-badge-negative{background:rgba(239,68,68,.08);color:var(--fh-high,#dc2626)}.tradeoff-badge-neutral{background:rgba(107,114,128,.1);color:var(--fh-muted,#6b7280)}.tradeoff-item-price{font-size:13px;color:var(--fh-text,#1f2937);font-weight:500;line-height:1.5;margin-bottom:2px}.tradeoff-item-body{font-size:13px;color:var(--fh-muted);line-height:1.5}.tradeoff-baseline{display:flex;flex-direction:column;gap:6px;padding:10px 12px;margin-bottom:12px;border-radius:var(--fh-radius-sm,8px);background:rgba(59,130,246,.05);border:1px solid rgba(59,130,246,.18)}.tradeoff-baseline-header{display:flex;align-items:center;gap:8px}.tradeoff-baseline-label{font-size:11px;font-weight:700;color:#3b82f6;letter-spacing:.04em;white-space:nowrap;padding:2px 6px;border-radius:4px;background:rgba(59,130,246,.12)}.tradeoff-baseline-airline{color:var(--fh-ink);font-weight:600;font-size:13px;flex:1}.tradeoff-baseline-price{font-weight:700;color:var(--fh-high,#dc2626);white-space:nowrap;font-size:13px}.tradeoff-baseline-detail{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--fh-muted);flex-wrap:wrap}.tradeoff-baseline-route{font-weight:500;color:var(--fh-ink)}.tradeoff-segment-label{font-size:11px;font-weight:600;color:var(--fh-muted);background:var(--fh-line);padding:1px 5px;border-radius:3px;white-space:nowrap}.tradeoff-detail-sep{color:var(--fh-line)}.tradeoff-stops-direct{color:#059669;font-weight:600}.tradeoff-stops-transit{color:#d97706;font-weight:500}.tradeoff-item-desc{font-size:12.5px;color:var(--fh-ink);line-height:1.6;margin-top:4px}.booking-live-overlay{position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;backdrop-filter:blur(2px)}.booking-live-panel{background:var(--fh-white);border-radius:16px;box-shadow:0 24px 48px rgba(0,0,0,.2);width:min(90vw,900px);max-height:90vh;display:flex;flex-direction:column;overflow:hidden}.booking-live-header{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--fh-line)}.booking-live-title{font-size:15px;font-weight:600;color:var(--fh-ink)}.booking-live-close{width:28px;height:28px;border:none;background:var(--fh-card);border-radius:50%;cursor:pointer;font-size:14px}.booking-live-close,.booking-live-screen{display:flex;align-items:center;justify-content:center}.booking-live-screen{position:relative;background:#1a1a2e;min-height:400px}.booking-live-frame{display:none;width:100%;height:auto;max-height:60vh;-o-object-fit:contain;object-fit:contain}.booking-live-loading{color:#888;font-size:14px}.booking-live-status{display:flex;align-items:center;gap:12px;padding:12px 20px;font-size:13px;color:var(--fh-muted);border-top:1px solid var(--fh-line)}.booking-live-progress{flex:1;height:4px;background:var(--fh-line);border-radius:2px;overflow:hidden}.booking-live-progress-fill{height:100%;width:0;background:var(--fh-brand);border-radius:2px;transition:width .3s ease}.booking-live-controls{display:flex;gap:10px;padding:12px 20px;justify-content:flex-end;border-top:1px solid var(--fh-line)}.booking-live-btn{padding:8px 20px;border-radius:8px;border:none;font-size:13px;cursor:pointer;font-weight:500}.booking-live-btn.cancel{background:var(--fh-card);color:var(--fh-ink)}.booking-live-btn.confirm{background:var(--fh-brand);color:white}