/* --- 2. 新形态通用组件 --- */

/* 内凹面板 */
 .inner-box {
    box-shadow: inset 5px 5px 10px #d1d9e6, inset -5px -5px 10px #ffffff !important;
    border-radius: 15px;
    padding: 15px;
}
/* --- 3. 导航宫格系统 --- */
 .nav-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    /* 电脑端 4 列 */
    gap: 20px;
    margin-top: 25px;
    margin:20px;
}
/* 导航入口卡片 */
 .nav-item {
    border-radius: 20px;
    padding: 25px 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    transition: all 0.2s ease;
    box-shadow: 5px 5px 10px #d1d9e6, -5px -5px 10px #ffffff;
    cursor: pointer;
}
/* 悬停反馈：轻微浮起 */
 .nav-item:hover {
    transform: translateY(-3px);
    box-shadow: 8px 8px 16px #d1d9e6, -8px -8px 16px #ffffff;
}
/* 点击反馈：下沉感 */
 .nav-item:active {
    box-shadow: inset 4px 4px 8px #d1d9e6, inset -4px -4px 8px #ffffff !important;
    transform: translateY(1px);
}
/* 图标内凹圈 */
 .icon-circle {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 12px;
    font-size: 24px;
    transition: 0.3s;
}
.nav-item:hover .icon-circle {
    color: #007bff;
    /* 悬停时图标变色 */
}
/* 文字样式 */
 .nav-name {
    font-size: 16px;
    font-weight: bold;
    color: #313d5a;
    margin-bottom: 4px;
}
.nav-desc {
    font-size: 12px;
    color: #a0aec0;
}
/* 针对导航项去掉下划线 */
 .nav-item, .nav-item:hover {
    text-decoration: none !important;
}
/* --- 4. 移动端适配 --- */
 @media (max-width: 900px) {
    .nav-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}
@media (max-width: 600px) {
    .nav-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .nav-item {
        padding: 20px 10px;
    }
}