/* 外链跳转过渡 */
.link-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: rgba(15, 23, 42, 0.42);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.22s ease, visibility 0.22s ease;
}

.link-overlay.is-visible {
    opacity: 1;
    visibility: visible;
}

.link-overlay-card {
    width: min(18rem, 100%);
    padding: 1.35rem 1.25rem 1.15rem;
    background: #fff;
    border-radius: 1rem;
    text-align: center;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
    animation: linkCardIn 0.28s ease;
}

@keyframes linkCardIn {
    from {
        opacity: 0;
        transform: translateY(10px) scale(0.97);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.link-overlay-spinner {
    width: 2rem;
    height: 2rem;
    margin: 0 auto 0.85rem;
    border: 3px solid #e8eef5;
    border-top-color: var(--accent-color, #0066ff);
    border-radius: 50%;
    animation: linkSpin 0.75s linear infinite;
}

@keyframes linkSpin {
    to { transform: rotate(360deg); }
}

.link-overlay-text {
    font-size: 0.95rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 0.35rem;
}

.link-overlay-hint {
    font-size: 0.75rem;
    color: #94a3b8;
    line-height: 1.45;
}

.download-btn.is-opening,
.dl-btn.is-opening,
.learn-more.is-opening {
    opacity: 0.65;
    transform: scale(0.97);
    pointer-events: none;
}

.download-btn:active:not(.is-opening),
.dl-btn:active:not(.is-opening) {
    transform: scale(0.96);
}