<p>Lithium-ion sieve (LIS)-based adsorption technology offers a promising solution for seawater lithium extraction, as it overcomes the challenge posed by the high Na⁺/Li⁺ ratio. However, its broader application is hindered by the performance degradation and dissolution loss of LISs after granulation, as well as the low Li⁺ concentration in seawater. Herein, we propose an <i>Albizia julibrissin-</i>inspired adsorption-responsive photothermal ion pump (APIP) for enhanced and reversible Li⁺ extraction from seawater. The APIP integrates an interpenetrating network hydrogel with confined hydrogen manganese oxide (HMO) via an innovative in-situ crosslinking and ion-exchange strategy, ensuring the uniform distribution of HMO. The specific adsorption-responsive swelling behaviour of APIP exposes more adsorption sites, resulting in a high Li⁺ extraction capacity of 34 mg g^-1 HMO, even surpassing HMO powders. Moreover, the low free water characteristics and the selective chelation of the polymer chain on Mn²⁺ effectively mitigate Mn dissolution. Under solar irradiation, the Li⁺&#xa0;extraction kinetics of the APIP increased&#xa0;by a remarkable 2.9-fold owing to the evaporative convection and photothermal effects. Collectively, APIP overcomes the application key&#xa0;limitations of powdered LISs, and opens new avenues for seawater utilization and the advancement of the&#xa0;Sustainable Development Goals.</p>