/* PKC WhatsApp 悬浮按钮 */
#pkc-wa-fab {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 999999;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #25D366;
    box-shadow: 0 4px 16px rgba(0,0,0,.18);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: transform .15s ease, box-shadow .15s ease;
    animation: pkc-wa-pulse 2.4s infinite;
}
#pkc-wa-fab:hover,
#pkc-wa-fab:focus {
    transform: scale(1.08);
    box-shadow: 0 6px 22px rgba(0,0,0,.22);
    background: #1ebe5b;
}
#pkc-wa-fab svg {
    display: block;
}

@keyframes pkc-wa-pulse {
    0%, 100% { box-shadow: 0 4px 16px rgba(0,0,0,.18), 0 0 0 0 rgba(37,211,102,.55); }
    50%       { box-shadow: 0 4px 16px rgba(0,0,0,.18), 0 0 0 14px rgba(37,211,102,0); }
}

#pkc-wa-bubble {
    position: fixed;
    right: 88px;
    bottom: 32px;
    z-index: 999999;
    max-width: 240px;
    padding: 10px 14px;
    background: #fff;
    color: #111;
    font-size: 14px;
    line-height: 1.4;
    border-radius: 12px 12px 0 12px;
    box-shadow: 0 4px 16px rgba(0,0,0,.15);
    opacity: 0;
    transform: translateY(6px);
    pointer-events: none;
    transition: opacity .25s ease, transform .25s ease;
}
#pkc-wa-bubble.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
#pkc-wa-bubble::after {
    content: '';
    position: absolute;
    right: -6px;
    bottom: 0;
    width: 0;
    height: 0;
    border-left: 8px solid #fff;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
}

@media (max-width: 600px) {
    #pkc-wa-fab { right: 14px; bottom: 14px; width: 52px; height: 52px; }
    #pkc-wa-bubble { right: 76px; bottom: 22px; max-width: 180px; font-size: 13px; }
}