Family law is a critical site where Islamic legal traditions, state regulation, social practice, and international human-rights standards intersect. In Muslim-majority jurisdictions, tensions surrounding gender equality, marriage, polygamy, divorce, child marriage, custody, maintenance, and marital property raise a broader question of how legal reform can protect human dignity without treating Islamic law as inherently incompatible with contemporary rights. This article employs normative legal research using statutory, conceptual, comparative, and case-oriented approaches. It examines international human-rights instruments, Indonesian constitutional and statutory law, the Compilation of Islamic Law, and comparative reform experiences in Morocco, Tunisia, Malaysia, and India, supplemented by recent scholarship on Indonesia. The analysis finds that sustainable harmonization is best understood as dialogical normative translation rather than one-sided legal transplantation. Five mutually reinforcing pathways are emphasized: contextual ijtihad and maqāṣid al-sharīʿah reasoning; rights-based legislative reform; gender- and child-sensitive adjudication; comparative legal learning; and participatory accountability through civil society and international monitoring. The Indonesian experience demonstrates that formal legislative progress, including the 2019 marriage-law reform, may be weakened by implementation gaps, particularly through marriage dispensations and uneven judicial practice. The article therefore proposes a six-dimensional framework combining international human-rights benchmarks, contextual Islamic jurisprudence, legislative reform, judicial sensitivity, institutional implementation, and participatory legitimacy. This model seeks to reconcile religious legitimacy and universal rights while strengthening substantive family justice.