@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* 子导航链接hover效果（增强） */
.subnav-wrapper {
    cursor: pointer;
}

.subnav-wrapper:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(107, 70, 229, 0.15);
    background: rgba(255, 255, 255, 0.9);
}

.subnav-wrapper:hover .subnav {
    color: #6b46e5;
}

/* 当前栏目的active状态（增强效果） */
.subnav-wrapper.active {
    background: linear-gradient(135deg, #6b46e5 0%, #8b5cf6 100%);
    border: 2px solid #6b46e5;
    box-shadow: 0 8px 30px rgba(107, 70, 229, 0.3);
    transform: translateY(-1px);
}

.subnav-wrapper.active .subnav {
    color: #ffffff;
    font-weight: 700;
    text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.subnav-wrapper.active:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(107, 70, 229, 0.4);
    background: linear-gradient(135deg, #7c3aed 0%, #9333ea 100%);
}

.subnav-wrapper.active:hover .subnav {
    color: #ffffff;
}

/* 简洁的响应式设计 */
@media (max-width: 992px) {
    .about-content {
        flex-direction: column;
        gap: 30px;
    }
    
    .about-left {
        width: 100% !important;
        padding-right: 0;
        border-right: none;
        margin-bottom: 20px;
    }
}

@media (max-width: 768px) {
    .page-header h1 {
        font-size: 24px;
    }
    
    .content-box {
        padding: 24px !important;
        margin: 0 16px;
    }
    
    .content-body {
        font-size: 15px;
        line-height: 1.7;
    }
    
    .about-left {
        padding: 30px 20px !important;
    }
    
    .about-title {
        font-size: 28px !important;
        margin-bottom: 20px !important;
    }
}

@media (max-width: 480px) {
    .about-left {
        padding: 25px 16px !important;
    }
    
    .about-title {
        font-size: 24px !important;
    }
    
    .subnav-wrapper {
        padding: 12px 16px !important;
        margin-bottom: 12px !important;
    }
    
    .subnav {
        font-size: 14px !important;
    }
}