.topic-sections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin: 30px 0;
}

.topic-section {
    background-color: #ffffff;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border: 1px solid #e9ecef;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.topic-section:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
    border-color: #b3e5fc;
}

.section-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.section-icon {
    font-size: 36px;
    margin-right: 15px;
    color: #0288d1;
}

.section-title {
    font-size: 20px;
    font-weight: bold;
    color: #01579b;
    margin: 0;
}

.section-content {
    flex-grow: 1;
    margin-bottom: 20px;
}

.section-desc {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
}

.topic-subitems {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.subitem {
    display: inline-block;
    padding: 6px 12px;
    background-color: #e1f5fe;
    color: #0288d1;
    border-radius: 20px;
    text-decoration: none;
    font-size: 13px;
    transition: all 0.3s ease;
}

.subitem:hover {
    background-color: #0288d1;
    color: #ffffff;
}

.view-more {
    display: inline-block;
    background-color: #0288d1;
    color: #ffffff;
    padding: 10px 20px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
    margin-top: auto;
}

.view-more:hover {
    background-color: #01579b;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(2, 136, 209, 0.2);
    color: #ff0;
    text-decoration: none;
}

@media (max-width: 1024px) {
    .topic-sections {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .topic-sections {
        grid-template-columns: repeat(2, 1fr);
    }

    .topic-section {
        padding: 20px;
    }

    .section-icon {
        font-size: 32px;
        margin-right: 12px;
    }

    .section-title {
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .topic-sections {
        grid-template-columns: 1fr;
    }
}









.l3c {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 15px;
    grid-auto-rows: 1fr;
}

.l3c li {
    margin: 0;
    display: flex;
    align-items: stretch;
}

.l3c>i{display:none;}

.l3c li a {
    display: flex;
    flex-direction: column;
    justify-content: center;
    flex: 1;
    padding: 18px 22px;
    background-color: #ffffff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    text-decoration: none;
    color: #333;
    font-size: 18px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
    min-height: 90px;
}

.l3c li a::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background-color: #0288d1;
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.l3c li a:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
    border-color: #0288d1;
    color: #0288d1;
}

.l3c li a:hover::before {
    transform: scaleY(1);
}

.l3c li a[title]::after {
    content: attr(title);
    display: block;
    font-size: 12px;
    color: #999;
    margin-top: 4px;
    font-weight: normal;
}

@media (max-width: 1024px) {
    .l3c {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 12px;
    }
}

@media (max-width: 768px) {
    .l3c {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 10px;
    }

    .l3c li a {
        padding: 10px;
        /* font-size: 13px; */
        min-height: 50px;
    }
}

@media (max-width: 480px) {
    .l3c {
        grid-template-columns: 1fr;
        margin: 15px 0;
    }
}