.network-map {
    --network-surface: var(--c-dark, #101820);
    --network-accent: var(--c-accent, #a8b5c2);
    --network-highlight: var(--c-highlight, #e0e6ec);
    position: relative;
    isolation: isolate;
    width: 100%;
    min-width: 0;
    height: var(--network-height, 560px);
    overflow: hidden;
    color: #edf3f8;
    background: var(--network-surface);
    border-radius: var(--radius-lg, 22px);
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    contain: layout paint;
}
.network-map::before {
    content: "";
    position: absolute;
    z-index: -1;
    inset: 8% 5%;
    opacity: .08;
    background: radial-gradient(ellipse at 62% 46%, var(--network-accent), transparent 62%);
    pointer-events: none;
}
.network-map--light {
    --network-surface: var(--c-bg-soft, #f4f7fb);
    color: var(--c-ink, #142033);
}
.network-map__chart, .network-map__fallback { position: absolute; inset: 0; }
.network-map__chart { opacity: 0; transition: opacity 600ms var(--ease-out, ease-out); }
.network-map__fallback { display: grid; place-items: center; }
.network-map__fallback img { display: block; width: 100%; height: 100%; object-fit: contain; opacity: .8; }
.network-map__fallback p {
    position: absolute;
    bottom: 48px;
    margin: 0;
    padding: 8px 16px;
    background: var(--network-surface);
    color: inherit;
    font-size: 14px;
    line-height: 1.7;
    text-align: center;
}
.network-map__fallback p span { display: block; font-size: 12px; opacity: .65; }
.network-map__fallback .network-map__location-fallback { position: static; padding: 24px; font-size: 22px; font-weight: 600; }
.network-map__location-fallback span:last-child { margin-top: 12px; font-weight: 400; }
.network-map__location-fallback .network-map__fallback-pin {
    width: 26px;
    height: 26px;
    margin: 0 auto 26px;
    border: 7px solid var(--network-accent);
    border-radius: 50% 50% 0 50%;
    transform: rotate(45deg);
    opacity: 1;
}
.network-map.is-ready .network-map__chart { opacity: 1; }
.network-map.is-ready .network-map__fallback { visibility: hidden; }
.network-map__legend {
    position: absolute;
    right: 0;
    bottom: 18px;
    left: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    font-size: 12px;
    letter-spacing: .08em;
    opacity: .78;
    pointer-events: none;
}
.network-map__key { display: inline-block; flex: 0 0 auto; }
.network-map__key--center { width: 6px; height: 6px; border-radius: 50%; background: var(--network-highlight); box-shadow: 0 0 0 4px color-mix(in srgb, var(--network-highlight) 12%, transparent); }
.network-map__key--route { width: 25px; height: 2px; margin-left: 18px; background: linear-gradient(90deg, var(--network-highlight), var(--network-accent)); }
.network-map--single .network-map__key--center { width: 8px; height: 8px; background: var(--network-accent); }
.network-map--single .network-map__legend { letter-spacing: .04em; }
.network-map.is-paused .network-map__chart { transition: none; }
@media (max-width: 640px) {
    .network-map { height: min(var(--network-height, 560px), 360px); border-radius: var(--radius-md, 14px); }
    .network-map__legend { bottom: 12px; font-size: 11px; }
    .network-map__fallback p { bottom: 38px; font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) {
    .network-map__chart { transition: none; }
}