/* 弹窗样式 */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(13, 27, 42, 0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s var(--transition-timing);
}

.popup-overlay.active {
    opacity: 1;
    visibility: visible;
}

.popup-container {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    max-width: 90%;
    width: 420px;
    box-shadow: 0 10px 30px rgba(0, 225, 255, 0.2);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    transform: translateY(-20px);
    transition: transform 0.4s var(--transition-timing);
    position: relative;
}

.popup-overlay.active .popup-container {
    transform: translateY(0);
}

.popup-content {
    text-align: center;
}

.popup-content h3 {
    color: var(--primary);
    margin-bottom: 16px;
    font-size: 1.4rem;
}

.popup-link {
    display: block;
    padding: 12px;
    margin: 16px 0;
    background: rgba(0, 225, 255, 0.1);
    border: 1px solid var(--primary);
    border-radius: 8px;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
}

.popup-link:hover {
    background: rgba(0, 225, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 225, 255, 0.15);
}

.popup-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 24px;
    height: 24px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s ease;
}

.popup-close:hover {
    color: var(--primary);
}