.sign-footer{-ms-flex-negative:0;flex-shrink:0;display:-webkit-box;display:-ms-flexbox;display:flex;gap:12px;padding:12px 16px;padding-bottom:calc(12px + env(safe-area-inset-bottom));background:#fff;border-top:1px solid #eef1f6;-webkit-box-shadow:0 -4px 16px rgba(15,23,42,.04);box-shadow:0 -4px 16px rgba(15,23,42,.04);-webkit-box-sizing:border-box;box-sizing:border-box}.sign-footer--fixed{position:fixed;left:0;right:0;bottom:0;z-index:10}.sign-btn{-webkit-box-flex:1;-ms-flex:1;flex:1;height:48px;font-size:16px;border-radius:10px}.sign-btn--clear{color:#4b5563;background:#f9fafb;border-color:#d1d5db}.sign-btn--clear:focus,.sign-btn--clear:hover{color:#374151;background:#f3f4f6;border-color:#9ca3af}.sign-btn--submit{background:#1890ff;border-color:#1890ff;-webkit-box-shadow:0 4px 12px rgba(24,144,255,.3);box-shadow:0 4px 12px rgba(24,144,255,.3)}.sign-btn--submit:focus,.sign-btn--submit:hover{background:#40a9ff;border-color:#40a9ff}@media (orientation:landscape) and (max-height:520px){.sign-footer{padding:6px 12px;padding-bottom:calc(6px + env(safe-area-inset-bottom));gap:8px}.sign-btn{height:36px;font-size:14px}}