body {
    font-family: "Microsoft YaHei", sans-serif;
    background-color: #f8f9fa;
}

.category-title {
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e9ecef;
    font-weight: 600;
    color: #343a40;
}

.category-title i {
    color: #7bacf5;
    margin-right: 8px;
}

.card-link {
    text-decoration: none;
    color: inherit;
    display: block;
    height: 100%;
    transition: transform 0.3s ease;
}

.card-link:hover {
    transform: translateY(-5px);
}

.link-card {
    height: 180px;
    background-size: cover;
    background-position: center;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: relative;
    transition: all 0.3s;
    /* 添加默认背景颜色，图片加载失败时显示 */
    background-color: #a8d0f5;
}

/* 管理后台卡片背景颜色 */
.admin-card {
    background-color: #a8d0f5;
}

/* 官网卡片背景颜色 */
.official-card {
    background-color: #b8f0d0;
}

/* 第三方网站卡片背景颜色 */
.third-party-card {
    background-color: #f7c7c1;
}

/* 更多自定义颜色类 - 更浅的颜色 */
.color-blue {
    background-color: #a8d0f5;
}

.color-blue2 {
    background-color: #a8ebf5;
}

.color-blue3 {
    background-color: #a8f5f5;
}

.color-green {
    background-color: #a8efbe;
}

.color-black {
    background-color: #000000;
}

.color-grey {
    background-color: #5b5b5b;
}

.color-gray {
    background-color: #d6dbdc;
}

.color-grey2 {
    background-color: #a8b3be;
}

.color-red {
    background-color: #ea4335;
}

.color-purple {
    background-color: #d5b8e8;
}

.color-orange {
    background-color: #fad7b1;
}

.color-yellow {
    background-color: #faeab2;
}

.color-teal {
    background-color: #a8e6da;
}

.color-navy {
    background-color: #a8b6c5;
}

.color-pink {
    background-color: #f7c1d7;
}

.color-brown {
    background-color: #c5b3aa;
}

.link-card:hover {
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.3);
}

.link-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* 减轻渐变遮罩的不透明度 */
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.1) 20%, rgba(0, 0, 0, 0.4) 90%);
    z-index: 1;
}

.card-body {
    position: relative;
    z-index: 2;
    color: white;
    padding-top: 80px;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.card-text {
    font-size: 0.9rem;
    opacity: 0.9;
}

@media (max-width: 768px) {
    .link-card {
        height: 160px;
    }

    .card-body {
        padding-top: 60px;
    }
}

/* 页面标题样式 */
.display-4 {
    color: #212529;
    font-weight: 700 !important;
    margin-bottom: 0.5rem;
}

.lead {
    color: #6c757d;
}

/* 页脚样式 */
footer {
    color: #6c757d;
    font-size: 0.9rem;
}