/* 统一响应式移动端样式 */

/* ========== 导航菜单 ========== */
@media (max-width: 991px) {
    .navbar-collapse {
        padding: 16px 0;
        border-top: 1px solid var(--border);
        margin-top: 12px;
    }
    
    .navbar-nav {
        flex-direction: row !important;
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .navbar-nav .nav-link {
        padding: 8px 12px !important;
        background: #f8f8f8;
        border-radius: 6px;
        font-size: 14px;
    }
    
    .navbar-nav .dropdown-menu {
        position: static !important;
        background: transparent;
        border: none;
        padding: 0;
        margin-top: 8px;
    }
    
    .navbar-nav .dropdown-menu .dropdown-item {
        padding: 6px 12px;
        font-size: 13px;
    }
    
    .hot-search-tags {
        display: none;
    }
    
    /* 搜索框优化 */
     .navbar-collapse .search-box {
         display: flex;
         width: 100%;
         margin: 12px 0;
         order: -1;
     }
    
    .navbar-collapse .search-box input {
        flex: 1;
        height: 40px;
        padding: 0 12px;
        border: 1px solid #ddd;
        border-radius: 8px 0 0 8px;
        font-size: 14px;
    }
    
    .navbar-collapse .search-box button {
        width: 44px;
        height: 40px;
        border-radius: 0 8px 8px 0;
        background: var(--primary);
        border: none;
    }
    
    .navbar-collapse .search-box button i {
        font-size: 16px;
    }
    
    /* 用户头像优化 */
    .navbar-collapse .user-avatar {
        width: 28px;
        height: 28px;
        margin-right: 8px;
    }
    
    .navbar-collapse .nav-link.dropdown-toggle {
        display: flex !important;
        align-items: center;
        padding: 6px 12px !important;
        background: #f8f8f8;
        border-radius: 6px;
        font-size: 13px;
    }
    
    /* 登录/注册按钮 */
    .navbar-collapse .btn-login,
    .navbar-collapse .btn-register {
        padding: 8px 16px;
        font-size: 13px;
    }
    
    .navbar-collapse .navbar-nav:last-child {
        margin-top: 12px;
        padding-top: 12px;
        border-top: 1px solid #eee;
    }
}

/* ========== 书籍卡片 ========== */
@media (max-width: 767px) {
    .book-card {
        margin-bottom: 16px;
    }
    
    .book-card .book-cover {
        height: 180px;
    }
    
    .book-card .book-info {
        padding: 12px;
    }
    
    .book-card .book-title {
        font-size: 14px;
        margin-bottom: 6px;
    }
    
    .book-card .book-author {
        font-size: 12px;
        margin-bottom: 8px;
    }
}

/* ========== 搜索结果 ========== */
@media (max-width: 767px) {
    .search-header h4 {
        font-size: 18px;
    }
    
    .result-count {
        font-size: 14px;
    }
    
    .search-filters {
        padding: 12px;
    }
    
    .filter-group {
        margin-bottom: 12px;
    }
    
    .related-searches {
        overflow-x: auto;
        white-space: nowrap;
        padding-bottom: 8px;
    }
    
    .related-searches .badge {
        display: inline-block;
    }
}

/* ========== 书籍详情 ========== */
@media (max-width: 767px) {
    .book-detail .book-cover-wrapper {
        width: 100%;
        max-width: 200px;
        margin: 0 auto 20px;
    }
    
    .book-detail .book-cover {
        height: 280px;
    }
    
    .book-detail .book-title {
        font-size: 20px;
        text-align: center;
    }
    
    .book-detail .book-meta {
        justify-content: center;
    }
    
    .book-detail .action-buttons {
        flex-direction: column;
        gap: 10px;
    }
    
    .book-detail .action-buttons .btn {
        width: 100%;
    }
    
    .book-tabs {
        flex-direction: column;
    }
    
    .book-tabs .nav-link {
        width: 100%;
        text-align: center;
    }
}

/* ========== 评论区域 ========== */
@media (max-width: 767px) {
    .comment-form {
        padding: 16px;
    }
    
    .comment-list .comment-item {
        padding: 12px;
    }
    
    .comment-list .comment-avatar {
        width: 36px;
        height: 36px;
        font-size: 14px;
    }
    
    .comment-list .comment-content {
        font-size: 14px;
    }
    
    .rating-stars {
        gap: 4px;
    }
    
    .rating-stars label {
        font-size: 18px;
    }
}

/* ========== 用户中心 ========== */
@media (max-width: 767px) {
    .user-profile {
        text-align: center;
    }
    
    .user-profile .avatar {
        width: 80px;
        height: 80px;
        font-size: 28px;
        margin: 0 auto 12px;
    }
    
    .user-profile .user-name {
        font-size: 18px;
    }
    
    .user-stats {
        justify-content: center;
        gap: 20px;
        margin-top: 12px;
    }
    
    .user-menu {
        margin-top: 20px;
    }
    
    .user-menu .nav-link {
        padding: 12px 16px;
    }
    
    .user-menu .nav-link i {
        margin-right: 8px;
    }
}

/* ========== 通用 ========== */
@media (max-width: 767px) {
    .container {
        padding-left: 12px;
        padding-right: 12px;
    }
    
    h1 {
        font-size: 22px;
    }
    
    h2 {
        font-size: 18px;
    }
    
    h3, h4 {
        font-size: 16px;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 14px;
    }
    
    .card {
        margin-bottom: 16px;
    }
    
    .card-body {
        padding: 12px;
    }
    
    .badge {
        font-size: 11px;
        padding: 4px 8px;
    }
    
    .pagination {
        flex-wrap: wrap;
        justify-content: center;
        gap: 4px;
    }
    
    .pagination .page-link {
        padding: 6px 10px;
        font-size: 13px;
    }
    
    .modal-body {
        padding: 16px;
    }
    
    .form-label {
        font-size: 14px;
    }
    
    .form-control {
        font-size: 14px;
        padding: 10px 12px;
    }
}

/* ========== 首页 ========== */
@media (max-width: 767px) {
    .hero-section {
        padding: 40px 0;
    }
    
    .hero-section h1 {
        font-size: 24px;
    }
    
    .hero-section p {
        font-size: 14px;
    }
    
    .section-header {
        margin-bottom: 16px;
    }
    
    .section-header h2 {
        font-size: 18px;
    }
    
    .book-grid {
        gap: 12px;
    }
}

/* ========== 书籍列表 ========== */
@media (max-width: 767px) {
    .category-header {
        padding: 24px 0;
    }
    
    .category-header h1 {
        font-size: 22px;
    }
    
    .category-header .breadcrumb {
        font-size: 12px;
    }
    
    .books-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
}

/* ========== 页脚 ========== */
@media (max-width: 767px) {
    .footer {
        padding: 20px 0 16px;
    }
    
    .footer-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        width: 100%;
        padding: 12px;
        margin-bottom: 16px;
        background: transparent;
        border: 1px solid #ddd;
        border-radius: 8px;
        font-size: 14px;
        color: #666;
        cursor: pointer;
        transition: all 0.3s ease;
    }
    
    .footer-toggle:hover {
        background: #f8f8f8;
    }
    
    .footer-toggle[aria-expanded="false"] i {
        transform: rotate(180deg);
    }
    
    .footer-toggle i {
        transition: transform 0.3s ease;
    }
    
    #footerContent {
        max-height: 0;
        overflow: hidden;
    }
    
    #footerContent.show {
        max-height: 500px;
    }
    
    #footerContent .row {
        padding: 0;
    }
    
    #footerContent h5 {
        font-size: 14px;
        margin-bottom: 12px;
    }
    
    #footerContent ul {
        margin-bottom: 16px;
    }
    
    #footerContent li {
        margin-bottom: 8px;
    }
    
    #footerContent a {
        font-size: 13px;
    }
    
    .footer-bottom {
        font-size: 12px;
        padding-top: 16px;
        margin-top: 16px;
        border-top: 1px solid #eee;
    }
    
    .friend-links {
        list-style: none;
        padding: 0;
        margin: 0;
    }
    
    .friend-links li {
        margin-bottom: 6px;
    }
    
    .friend-links a {
        font-size: 13px;
        color: #666;
        text-decoration: none;
        transition: color 0.2s;
    }
    
    .friend-links a:hover {
        color: var(--primary);
    }
    
    .footer-pages {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
        padding: 20px 0;
        margin-top: 20px;
        border-top: 1px solid #eee;
    }
    
    .footer-pages a {
        color: var(--secondary);
        text-decoration: none;
        font-size: 13px;
        transition: color 0.2s;
    }
    
    .footer-pages a:hover {
        color: var(--primary);
    }
    
    .footer-pages a:not(:last-child)::after {
        content: '|';
        margin-left: 16px;
        color: #ddd;
    }
}