/* 全屏遮罩样式 */
.ad-mask {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.mask-content {
    background: #1a1a2e;
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    max-width: 400px;
    width: 90%;
    border: 2px solid #3949ab;
}

.countdown {
    font-size: 60px;
    font-weight: bold;
    margin: 20px 0;
    color: #4fc3f7;
}

.message {
    font-size: 18px;
    color: #fff;
    margin-bottom: 20px;
}

.skip-btn {
    background: rgba(255, 255, 255, 0.1);
    color: #ccc;
    border: 1px solid #666;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
}

.skip-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}