.nav-item > a,
.dropdown-item > a { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.nav-item > a b,
.dropdown-item > a b { color: #1e90ff; font-size: 16px; line-height: 1; }
.nav-item:focus-within > .dropdown { opacity: 1; visibility: visible; transform: none; }
.dropdown-item { position: relative; }
.submenu-dropdown {
    position: absolute;
    top: -8px;
    left: calc(100% + 6px);
    min-width: 245px;
    padding: 8px;
    border: 1px solid rgba(0,0,128,.08);
    border-radius: 10px;
    background: #fff;
    box-shadow: 0 18px 45px rgba(0,0,128,.14);
    opacity: 0;
    visibility: hidden;
    transform: translateX(8px);
    transition: opacity .2s ease,transform .2s ease,visibility .2s;
}
.dropdown-item:hover > .submenu-dropdown,
.dropdown-item:focus-within > .submenu-dropdown { opacity: 1; visibility: visible; transform: none; }
.dropdown-item > a { border-radius: 7px; padding: 10px 12px; font-size: 13px; }
.dropdown-item > a:hover,
.dropdown-item > a:focus { background: #eef6ff; color: #000080; }

@media (max-width: 900px) {
    .nav-item > a { width: 100%; }
    .dropdown-item { margin-left: 10px; }
    .submenu-dropdown {
        position: static;
        min-width: 0;
        padding: 2px 0 2px 16px;
        border: 0;
        border-left: 2px solid #dcecff;
        border-radius: 0;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
    }
    .dropdown-item > a { padding: 9px 10px; }
    .dropdown-item > a b { transform: rotate(90deg); }
}