A cold-rolled steel sheet, comprising, as a chemical composition, in % by mass: C: 0.100% or more and less than 0.500%; Si: 0.8% or more and less than 4.0%; Mn: 1.0% or more and less than 4.0%; P: less than 0.015%; S: less than 0.0500%; N: less than 0.0100%; Al: less than 2.000%; Ti: 0.020% or more and less than 0.150%; Nb: 0% or more and less than 0.200%; V: 0% or more and less than 0.500%; B: 0% or more and less than 0.0030%; Mo: 0% or more and less than 0.500%; Cr: 0% or more and less than 2.000%; Mg: 0% or more and less than 0.0400%; Rem: 0% or more and less than 0.0400%; Ca: 0% or more and less than 0.0400%; and a remainder of Fe and impurities, wherein the total amount of Si and Al is 1.000% or more, wherein a metallographic structure contains 40.0% or more and less than 60.0% of a polygonal ferrite, 30.0% or more of a bainitic ferrite, 10.0% to 25.0% of a residual austenite, and 15.0% or less of a martensite, by an area ratio, wherein, in the residual austenite, a proportion of the residual austenite in which an aspect ratio is 2.0 or less, a length of a long axis is 1.0 μm or less, and a length of a short axis is 1.0 μm or less, is 80.0% or more, wherein, in the bainitic ferrite, a proportion of the bainitic ferrite in which an aspect ratio is 1.7 or less and an average value of a crystal orientation difference in a region surrounded by a boundary in which a crystal orientation difference is 15° or more is 0.5° or more and less than 3.0°, is 80.0% or more, wherein a connection index D value of the martensite, the bainitic ferrite, and the residual austenite is 0.70 or less, and wherein a tensile strength is 980 MPa or more, a 0.2% proof stress is 600 MPa or more, a total elongation is 21.0% or more, and a hole expansion ratio is 30.0% or more. C: 0.100% or more and less than 0.500%; Si: 0.8% or more and less than 4.0%; Mn: 1.0% or more and less than 4.0%; P: less than 0.015%; S: less than 0.0500%; N: less than 0.0100%; Al: less than 2.000%; Ti: 0.020% or more and less than 0.150%; Nb: 0% or more and less than 0.200%; V: 0% or more and less than 0.500%; B: 0% or more and less than 0.0030%; Mo: 0% or more and less than 0.500%; Cr: 0% or more and less than 2.000%; Mg: 0% or more and less than 0.0400%; Rem: 0% or more and less than 0.0400%; Ca: 0% or more and less than 0.0400%; and a remainder of Fe and impurities, wherein the total amount of Si and Al is 1.000% or more, wherein a metallographic structure contains 40.0% or more and less than 60.0% of a polygonal ferrite, 30.0% or more of a bainitic ferrite, 10.0% to 25.0% of a residual austenite, and 15.0% or less of a martensite, by an area ratio, wherein, in the residual austenite, a proportion of the residual austenite in which an aspect ratio is 2.0 or less, a length of a long axis is 1.0 μm or less, and a length of a short axis is 1.0 μm or less, is 80.0% or more, wherein, in the bainitic ferrite, a proportion of the bainitic ferrite in which an aspect ratio is 1.7 or less and an average value of a crystal orientation difference in a region surrounded by a boundary in which a crystal orientation difference is 15° or more is 0.5° or more and less than 3.0°, is 80.0% or more, wherein a connection index D value of the martensite, the bainitic ferrite, and the residual austenite is 0.70 or less, and wherein a tensile strength is 980 MPa or more, a 0.2% proof stress is 600 MPa or more, a total elongation is 21.0% or more, and a hole expansion ratio is 30.0% or more. <EOS>