/* 自定义样式，配合 Bootstrap 调整细节 */
body{font-family: "Helvetica Neue", Arial, "sans-serif"; padding-top: 0;}
.sticky-top{top: 0; z-index: 1020;}
.qr-img{width:120px;height:120px;object-fit:cover}
header.bg-light{background:linear-gradient(90deg,#f8f9fb,#ffffff)}
.card h5{font-size:1rem}
.display-5{font-weight:700}
footer a{text-decoration:none}
/* 小屏幕增强间距 */
@media (max-width:575.98px){
  .navbar-brand span{font-size:1rem}
}