html[dir=ltr] body{font-family:"Hiragino Sans,游ゴシック,Yu Gothic,Meiryo,sans-serif"}html[dir=ltr] *{font-family:Hiragino Sans,Hiragino Kaku Gothic ProN,游ゴシック,Yu Gothic,Meiryo,sans-serif}html{scroll-behavior:smooth}.hamburger_btn{position:relative;width:44px;height:44px}.hamburger_btn span{display:block;position:absolute;width:24px;height:2px;background:#000;border-radius:2px;transition:all .3s}.hamburger_btn .line_01{top:10px}.hamburger_btn .line_02{top:20px}.hamburger_btn .line_03{top:30px}.hamburger_btn.is-open .line_01{transform:rotate(45deg);top:20px}.hamburger_btn.is-open .line_02{opacity:0}.hamburger_btn.is-open .line_03{transform:rotate(-45deg);top:20px}