/* 导航栏样式（保留原有） */
.navbar-custom {
    background-color: #2c3e50 !important;
    border-radius: 0;
    margin-bottom: 0;
    border: none !important;
}
.navbar-custom .navbar-brand,
.navbar-custom .navbar-nav>li>a {
    color: #fff !important;
    line-height: 60px;
    height: 60px;
    padding-top: 0 !important;
    padding-bottom: 0 !important;
    font-size: 16px;
}
.navbar-custom .navbar-brand:hover,
.navbar-custom .navbar-nav>li>a:hover {
    color: #18bc9c !important;
    background-color: transparent !important;
}
.navbar-custom .navbar-nav>.active>a {
    background-color: transparent !important;
    color: #18bc9c !important;
}
.navbar-custom .dropdown-menu {
    background-color: #2c3e50 !important;
    border: none !important;
    border-radius: 0 !important;
    padding: 0 !important;
    box-shadow: none !important;
}
.navbar-custom .dropdown-menu>li>a {
    color: #fff !important;
    padding: 10px 20px !important;
    line-height: normal !important;
    height: auto !important;
}
.navbar-custom .dropdown-menu>li>a:hover {
    background-color: #18bc9c !important;
    color: #fff !important;
}
.navbar-custom .navbar-toggle {
    margin-top: 13px !important;
    margin-bottom: 13px !important;
    border-color: #fff !important;
}
.navbar-custom .navbar-toggle .icon-bar {
    background-color: #fff !important;
}
.navbar-custom .navbar-toggle:hover {
    background-color: #18bc9c !important;
}
@media (max-width: 767px) {
    .navbar-custom .navbar-nav .open .dropdown-menu>li>a {
        padding-left: 30px !important;
    }
    .navbar-custom .navbar-collapse {
        background-color: #2c3e50 !important;
        border-top: none !important;
    }
}

/* 尾部样式 */
footer {
    background-color: #2c3e50 !important;
    color: #fff !important;
    padding: 30px 0 !important;
    margin-top: 30px !important;
}
footer a {
    color: #ccc !important;
}
footer a:hover {
    color: #fff !important;
    text-decoration: none !important;
}
.thumbnail {
    border: 1px solid #eee !important;
    box-shadow: 0 2px 3px rgba(0,0,0,0.1) !important;
}
.thumbnail img {
    height: 180px !important;
    object-fit: cover !important;
}

/* ========== 新增：友情链接优化样式 ========== */
.friend-link-wrap {
    max-height: 180px; /* 限制最大高度，超出滚动 */
    overflow-y: auto; /* 纵向滚动 */
    padding-right: 10px; /* 避免滚动条遮挡文字 */
}
/* 流式网格布局：PC端3列，平板2列，手机1列 */
.friend-link-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px 15px; /* 行列间距 */
    margin: 0;
    padding: 0;
    list-style: none;
}
/* 平板适配 */
@media (max-width: 991px) {
    .friend-link-list {
        grid-template-columns: repeat(2, 1fr);
    }
}
/* 手机适配 */
@media (max-width: 767px) {
    .friend-link-list {
        grid-template-columns: 1fr;
    }
    .friend-link-wrap {
        max-height: 150px; /* 移动端减小最大高度 */
    }
}
/* 友情链接hover效果 */
.friend-link-list li a {
    display: inline-block;
    padding: 3px 0;
    border-bottom: 1px dashed transparent;
    transition: all 0.3s;
}
.friend-link-list li a:hover {
    color: #18bc9c !important;
    border-bottom: 1px dashed #18bc9c;
}
/* 折叠/展开按钮样式 */
.link-toggle-btn {
    margin-top: 10px;
    padding: 3px 10px;
    font-size: 12px;
    background-color: #34495e;
    color: #fff;
    border: none;
    border-radius: 3px;
    cursor: pointer;
}
.link-toggle-btn:hover {
    background-color: #18bc9c;
}