/* 移动端响应式样式 */

/* 移动端设备检测标识 */
body.mobile-device {
    --mobile-spacing: 0.5rem;
    --mobile-font-scale: 0.9;
}

/* 超小屏幕手机 (< 375px) */
@media (max-width: 374px) {
    html {
        font-size: 14px;
    }
    
    .navbar {
        top: 0.25rem;
        left: 0.25rem;
        right: 0.25rem;
        width: calc(100% - 0.5rem);
        border-radius: 0.75rem;
    }
    
    .nav-container {
        padding: 0 0.75rem;
        height: 60px;
    }
    
    .logo-image {
        height: 30px;
    }
    
    .logo-text {
        font-size: 1.1rem;
    }
    
    body {
        padding-top: 70px;
    }
    
    .btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
    
    .auth-buttons {
        gap: 0.5rem;
    }
    
    .main-content {
        padding: 0.75rem 0.5rem;
    }
    
    .card, .modern-card {
        padding: 0.75rem;
        border-radius: 0.75rem;
    }
    
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1.1rem; }
    h4 { font-size: 1rem; }
}

/* 小屏幕手机 (375px - 576px) */
@media (min-width: 375px) and (max-width: 576px) {
    html {
        font-size: 15px;
    }
    
    .navbar {
        border-radius: 0.75rem;
    }
    
    .nav-container {
        padding: 0 1rem;
        height: 65px;
    }
    
    .logo-image {
        height: 32px;
    }
    
    .logo-text {
        font-size: 1.2rem;
    }
    
    body {
        padding-top: 75px;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }
    
    .main-content {
        padding: 1rem 0.75rem;
    }
    
    .card, .modern-card {
        padding: 1rem;
        border-radius: 0.875rem;
    }
    
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.4rem; }
    h3 { font-size: 1.2rem; }
    h4 { font-size: 1.05rem; }
}

/* 平板手机 (577px - 768px) */
@media (min-width: 577px) and (max-width: 768px) {
    html {
        font-size: 16px;
    }
    
    .navbar {
        border-radius: 1rem;
    }
    
    .nav-container {
        padding: 0 1.5rem;
        height: 70px;
    }
    
    body {
        padding-top: 80px;
    }
    
    .main-content {
        padding: 1.25rem 1rem;
    }
}

/* 移动端导航优化 */
@media (max-width: 768px) {
    .navbar {
        position: fixed;
        top: 0.5rem;
        left: 0.5rem;
        right: 0.5rem;
        width: calc(100% - 1rem);
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0.5rem;
        right: 0.5rem;
        width: calc(100% - 1rem);
        max-height: calc(100vh - 90px);
        overflow-y: auto;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-radius: 0 0 1rem 1rem;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    }
    
    .nav-menu.active {
        display: flex;
        flex-direction: column;
        animation: slideDown 0.3s ease;
    }
    
    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    .nav-item {
        width: 100%;
        border-bottom: 1px solid var(--border-color, #E5E7EB);
    }
    
    .nav-item:last-child {
        border-bottom: none;
    }
    
    .nav-link {
        width: 100%;
        padding: 1rem 1.25rem;
        justify-content: flex-start;
        font-size: 1rem;
        border-radius: 0;
    }
    
    .nav-link:hover {
        background: var(--bg-light, #F9FAFB);
    }
    
    .dropdown-menu {
        position: static;
        box-shadow: none;
        background: var(--bg-light, #F9FAFB);
        border-radius: 0;
        padding: 0.5rem 0;
        margin: 0;
        opacity: 1;
        visibility: visible;
        transform: none;
        border: none;
    }
    
    .dropdown-menu li a {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .nav-right {
        position: fixed;
        top: 70px;
        left: 0.5rem;
        right: 0.5rem;
        width: calc(100% - 1rem);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-radius: 0 0 1rem 1rem;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
        padding: 1rem;
        display: none;
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .nav-right.active {
        display: flex;
    }
    
    .auth-buttons {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .auth-buttons .btn {
        width: 100%;
        text-align: center;
        padding: 0.875rem 1rem;
    }
    
    .user-menu {
        width: 100%;
    }
    
    .user-link {
        width: 100%;
        justify-content: flex-start;
        padding: 0.875rem 1rem;
        border-radius: 0.75rem;
    }
    
    .user-dropdown {
        position: static;
        box-shadow: none;
        background: var(--bg-light, #F9FAFB);
        border-radius: 0.5rem;
        margin-top: 0.5rem;
        min-width: 100%;
    }
    
    .theme-switcher {
        width: 100%;
    }
    
    .theme-switcher select {
        width: 100%;
        padding: 0.75rem 1rem;
        border-radius: 0.75rem;
        font-size: 0.9rem;
    }
}

/* 移动端按钮优化 */
@media (max-width: 768px) {
    .btn {
        min-height: 44px;
        touch-action: manipulation;
        -webkit-tap-highlight-color: transparent;
    }
    
    .btn:active {
        transform: scale(0.98);
    }
    
    .btn-lg, .btn-large {
        min-height: 52px;
        padding: 1rem 1.5rem;
        font-size: 1rem;
    }
    
    .btn-sm, .btn-small {
        min-height: 36px;
        padding: 0.5rem 0.875rem;
        font-size: 0.85rem;
    }
    
    .btn-block {
        width: 100%;
        display: flex;
    }
}

/* 移动端表单优化 */
@media (max-width: 768px) {
    .form-control, input, textarea, select {
        font-size: 16px !important;
        min-height: 44px;
        padding: 0.75rem 1rem;
        border-radius: 0.75rem;
    }
    
    textarea {
        min-height: 100px;
    }
    
    .form-group, .form-row {
        margin-bottom: 1rem;
    }
    
    label {
        font-size: 0.9rem;
        margin-bottom: 0.5rem;
        display: block;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .input-group .form-control,
    .input-group .btn {
        width: 100%;
        border-radius: 0.75rem;
        margin-bottom: 0.5rem;
    }
    
    .input-group .btn:last-child {
        margin-bottom: 0;
    }
}

/* 移动端卡片优化 */
@media (max-width: 768px) {
    .card, .modern-card {
        margin-bottom: 1rem;
        border-radius: 0.875rem;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }
    
    .card-header {
        padding: 0.875rem 1rem;
        font-size: 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .card-footer {
        padding: 0.75rem 1rem;
    }
    
    .card-grid, .grid-cards {
        display: grid;
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .card-horizontal {
        flex-direction: column;
    }
    
    .card-horizontal .card-img {
        width: 100%;
        height: 150px;
        object-fit: cover;
        border-radius: 0.875rem 0.875rem 0 0;
    }
}

/* 移动端表格优化 */
@media (max-width: 768px) {
    .table-responsive {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin-bottom: 1rem;
    }
    
    table {
        font-size: 0.85rem;
    }
    
    th, td {
        padding: 0.625rem 0.5rem;
        white-space: nowrap;
    }
    
    .table-mobile-stacked {
        display: block;
    }
    
    .table-mobile-stacked thead {
        display: none;
    }
    
    .table-mobile-stacked tbody,
    .table-mobile-stacked tr,
    .table-mobile-stacked td {
        display: block;
        width: 100%;
    }
    
    .table-mobile-stacked tr {
        margin-bottom: 1rem;
        border: 1px solid var(--border-color, #E5E7EB);
        border-radius: 0.75rem;
        padding: 0.75rem;
    }
    
    .table-mobile-stacked td {
        padding: 0.5rem 0;
        border: none;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    
    .table-mobile-stacked td::before {
        content: attr(data-label);
        font-weight: 600;
        margin-right: 1rem;
    }
}

/* 移动端模态框优化 */
@media (max-width: 768px) {
    .modal, .modal-dialog {
        width: 95%;
        margin: 1rem auto;
        padding: 0;
    }
    
    .modal-content {
        border-radius: 1rem;
        max-height: 90vh;
        overflow-y: auto;
    }
    
    .modal-header {
        padding: 1rem;
    }
    
    .modal-body {
        padding: 1rem;
    }
    
    .modal-footer {
        padding: 0.75rem 1rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .modal-footer .btn {
        width: 100%;
    }
}

/* 移动端图片优化 */
@media (max-width: 768px) {
    img {
        max-width: 100%;
        height: auto;
    }
    
    .img-fluid {
        width: 100%;
        height: auto;
    }
    
    .img-thumbnail {
        padding: 0.25rem;
        border-radius: 0.5rem;
    }
    
    .avatar, .profile-avatar {
        width: 60px;
        height: 60px;
        border-radius: 50%;
        object-fit: cover;
    }
    
    .avatar-sm {
        width: 40px;
        height: 40px;
    }
    
    .avatar-lg {
        width: 80px;
        height: 80px;
    }
}

/* 移动端列表优化 */
@media (max-width: 768px) {
    .list-group-item {
        padding: 0.875rem 1rem;
        font-size: 0.9rem;
    }
    
    .list-group-item-action {
        min-height: 48px;
    }
    
    ul, ol {
        padding-left: 1.25rem;
    }
}

/* 移动端间距优化 */
@media (max-width: 768px) {
    .mt-1, .my-1 { margin-top: 0.25rem !important; }
    .mt-2, .my-2 { margin-top: 0.5rem !important; }
    .mt-3, .my-3 { margin-top: 0.75rem !important; }
    .mt-4, .my-4 { margin-top: 1rem !important; }
    .mt-5, .my-5 { margin-top: 1.5rem !important; }
    
    .mb-1, .my-1 { margin-bottom: 0.25rem !important; }
    .mb-2, .my-2 { margin-bottom: 0.5rem !important; }
    .mb-3, .my-3 { margin-bottom: 0.75rem !important; }
    .mb-4, .my-4 { margin-bottom: 1rem !important; }
    .mb-5, .my-5 { margin-bottom: 1.5rem !important; }
    
    .p-1 { padding: 0.25rem !important; }
    .p-2 { padding: 0.5rem !important; }
    .p-3 { padding: 0.75rem !important; }
    .p-4 { padding: 1rem !important; }
    .p-5 { padding: 1.5rem !important; }
}

/* 移动端隐藏/显示 */
@media (max-width: 768px) {
    .hidden-mobile, .d-none-mobile {
        display: none !important;
    }
    
    .visible-mobile, .d-block-mobile {
        display: block !important;
    }
    
    .visible-mobile-flex, .d-flex-mobile {
        display: flex !important;
    }
}

@media (min-width: 769px) {
    .hidden-desktop, .d-none-desktop {
        display: none !important;
    }
    
    .visible-desktop, .d-block-desktop {
        display: block !important;
    }
}

/* 移动端页脚优化 */
@media (max-width: 768px) {
    .footer {
        padding: 1.5rem 1rem;
        border-radius: 1rem 1rem 0 0;
    }
    
    .footer-content {
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .footer-links a {
        display: block;
        padding: 0.5rem 0;
    }
}

/* 移动端触摸优化 */
@media (max-width: 768px) {
    a, button, .clickable {
        -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
    }
    
    .touch-action {
        touch-action: manipulation;
    }
    
    .no-select {
        -webkit-user-select: none;
        user-select: none;
    }
}

/* 安全区域适配 (iPhone X 等刘海屏) */
@supports (padding: max(0px)) {
    body {
        padding-top: max(70px, env(safe-area-inset-top) + 70px);
        padding-bottom: env(safe-area-inset-bottom);
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }
    
    .navbar {
        top: max(0.5rem, env(safe-area-inset-top));
    }
    
    .footer {
        padding-bottom: max(1.5rem, env(safe-area-inset-bottom));
    }
    
    .modal-footer {
        padding-bottom: max(0.75rem, env(safe-area-inset-bottom));
    }
}

/* 横屏模式优化 */
@media (max-width: 768px) and (orientation: landscape) {
    .navbar {
        top: 0.25rem;
    }
    
    .nav-container {
        height: 50px;
    }
    
    body {
        padding-top: 60px;
    }
    
    .nav-menu {
        top: 55px;
        max-height: calc(100vh - 70px);
    }
    
    .modal-content {
        max-height: 80vh;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    .btn {
        border: 2px solid currentColor;
    }
    
    .card, .modern-card {
        border: 2px solid var(--text-primary, #111827);
    }
}

/* 减少动画模式 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}