What’s font files you linked in css? The different file format is for different borwser, please refer:
TrueType Font (TTF) – Compatible with Internet Explorer version 9.0 and above, Chrome starting at 4.0, Firefox at 3.5, Safari since 3.1 and Opera beginning with 10.0
OpenType Font (OTF) – Has the same browser compatibility as the TrueType Font
Web Open Font Format (WOFF) – Supported by Internet Explorer version 9.0 and above, Chrome starting at 5.0, Firefox at 3.6, Safari since 5.1 and Opera beginning with 11.1
Web Open Font Format 2.0 (WOFF2) – Supported only by Chrome since version 36.0, Firefox starting at 35.0 and Opera with 26.0
Embedded OpenType Font (EOT) – Exclusively available for Internet Explorer version 6.0 and above.