/* 营造按钮的回字形墨框波纹：三层方框由内向外扩开、渐淡 */
#btn-deed.dk-rip-on { position: relative; overflow: visible !important; }
#btn-deed .dk-rip { position: absolute; inset: 0; pointer-events: none; z-index: 2; }
#btn-deed .dk-rip i { position: absolute; inset: -2px; border: 3px solid rgba(30, 32, 33, .95); border-radius: 3px; opacity: 0; animation: dkRip 1.8s ease-out infinite; }
#btn-deed .dk-rip i:nth-child(2) { animation-delay: .6s; }
#btn-deed .dk-rip i:nth-child(3) { animation-delay: 1.2s; }
@keyframes dkRip { 0% { opacity: 1; transform: scale(1); } 30% { opacity: .8; } 100% { opacity: 0; transform: scale(1.7, 2.3); } }