/* 子网掩码计算器 */
.sn-rows{border:1px solid #eef1f5;border-radius:.6rem;overflow:hidden}
.sn-row{display:flex;flex-wrap:wrap;align-items:baseline;gap:.75rem;padding:.6rem .875rem;border-bottom:1px solid #f1f4f8}
.sn-row:last-child{border-bottom:0}
.sn-row:nth-child(odd){background:#fafbfd}
.sn-k{flex:none;width:6.5rem;color:#8a9199;font-size:.8125rem}
.sn-v{flex:1 1 auto;min-width:0;color:#0f172a;font-weight:600;word-break:break-all}
.sn-hint{flex:none;color:#98a2b3;font-size:.75rem}
.sn-gray{color:#98a2b3;font-weight:400;font-size:.8125rem}