.art{margin:0 auto}.art-head{max-width:68ch;margin-bottom:calc(var(--u) * 6)}.art-head .hero{padding:0}.art-head .wrap{max-width:none;margin-inline:0;padding-inline:0}.art-return{margin:calc(var(--u) * 10) 0 0}.art-body{max-width:68ch}.art-body .wrap{max-width:none;margin-inline:0;padding-inline:0}.art-body .sec{padding-inline:0}