/* ============================================
   网址导航 - 响应式适配 (左右布局)
   ============================================ */

@media (max-width: 1199px) {
    .sidebar {
        width: 170px;
    }
    .sidebar-logo {
        padding: 18px 12px 14px;
    }
    .sidebar-logo i {
        font-size: 26px;
    }
    .sidebar-logo span {
        font-size: 13px;
    }
    .side-nav-item {
        padding: 8px 16px;
        font-size: 12px;
    }
    .sidebar-title {
        padding: 6px 16px 4px;
        font-size: 10px;
    }
    .link-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        gap: 12px;
    }
    .site-main {
        padding: 0 16px 32px;
    }
    .search-area {
        padding: 18px 0 12px;
    }
}

@media (max-width: 768px) {
    .layout {
        flex-direction: column;
    }

    /* 移动端侧边栏变顶部横向 */
    .sidebar {
        width: 100%;
        position: static;
        height: auto;
        background: #1a1a2e;
        flex-direction: row;
        align-items: center;
        padding: 0;
    }
    .sidebar-logo {
        flex-direction: row;
        padding: 12px 14px;
        border-bottom: none;
        border-right: 1px solid rgba(255,255,255,0.1);
        flex-shrink: 0;
    }
    .sidebar-logo i {
        font-size: 20px;
    }
    .sidebar-logo span {
        font-size: 14px;
    }
    .sidebar-inner {
        flex: 1;
        min-width: 0;
        padding: 0;
    }
    .sidebar-title {
        display: none;
    }
    .side-nav {
        flex-direction: row;
        overflow-x: auto;
        padding: 0 4px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    .side-nav::-webkit-scrollbar {
        display: none;
    }
    .side-nav-item {
        padding: 12px 12px;
        border-left: none;
        border-bottom: 2px solid transparent;
        white-space: nowrap;
        font-size: 12px;
    }
    .side-nav-item.active {
        border-left: none;
        border-bottom-color: #1890ff;
        background: transparent;
    }
    .side-nav-item:hover {
        border-left: none;
    }

    .site-main {
        padding: 0 12px 24px;
    }
    .search-area {
        padding: 14px 0 10px;
        margin-bottom: 14px;
    }
    .search-input {
        padding: 10px 40px 10px 14px;
        font-size: 13px;
    }
    .search-btn {
        width: 30px;
        height: 30px;
        font-size: 13px;
    }
    .search-engines {
        gap: 4px;
    }
    .engine-item {
        padding: 3px 10px;
        font-size: 11px;
    }

    .link-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    .link-card {
        padding: 12px;
        gap: 10px;
    }
    .card-icon {
        width: 36px;
        height: 36px;
    }
    .card-icon i {
        font-size: 15px;
    }
    .card-title {
        font-size: 13px;
    }
    .card-desc {
        font-size: 11px;
    }
    .category-title {
        font-size: 16px;
        margin-bottom: 12px;
    }
}

@media (max-width: 480px) {
    .link-grid {
        grid-template-columns: 1fr;
    }
    .link-card {
        padding: 14px;
    }
    .footer-links {
        font-size: 13px;
    }
    .footer-links .sep {
        margin: 0 8px;
    }
}