/* 新手引导气泡 */
.onboarding-bubble {
    position: fixed;
    z-index: 8000;
    max-width: 260px;
    padding: 10px 32px 10px 14px;
    background: #4a9eff;
    color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
    font-size: 13px;
    line-height: 1.4;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    pointer-events: auto;
    transition: opacity 0.2s ease;
    animation: onboarding-pop 0.25s ease-out;
}

.onboarding-bubble.hidden {
    display: none;
}

.onboarding-bubble.paint-hidden {
    opacity: 0;
    pointer-events: none;
}

@keyframes onboarding-pop {
    from { opacity: 0; transform: scale(0.9) translateY(4px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.onboarding-bubble.mobile {
    animation: onboarding-pop-mobile 0.25s ease-out;
}

@keyframes onboarding-pop-mobile {
    from { opacity: 0; transform: translateX(-50%) translateY(8px); }
    to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.onboarding-text {
    word-break: break-word;
}

.onboarding-close {
    position: absolute;
    top: 4px;
    right: 6px;
    width: 22px;
    height: 22px;
    line-height: 20px;
    text-align: center;
    background: transparent;
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 18px;
    cursor: pointer;
    opacity: 0.75;
    padding: 0;
}

.onboarding-close:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.18);
}

/* 箭头：通过 data-placement 切换方向 */
.onboarding-arrow {
    position: absolute;
    width: 0;
    height: 0;
    border-style: solid;
}

.onboarding-bubble[data-placement="top"] .onboarding-arrow {
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    border-width: 6px 6px 0 6px;
    border-color: #4a9eff transparent transparent transparent;
}

.onboarding-bubble[data-placement="bottom"] .onboarding-arrow {
    top: -6px;
    left: 50%;
    transform: translateX(-50%);
    border-width: 0 6px 6px 6px;
    border-color: transparent transparent #4a9eff transparent;
}

/* 移动端：固定底部，无箭头 */
.onboarding-bubble.mobile {
    max-width: calc(100vw - 32px);
    font-size: 14px;
    padding: 12px 36px 12px 16px;
}