/* 响应式样式 - 河南生物科技公司公众号服务平台 */

/* ========== 大屏幕 (≥1200px) ========== */
@media screen and (min-width: 1200px) {
    .hero-content h2 {
        font-size: 3rem;
    }
    
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .advantages-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ========== 中等屏幕 (≥992px 且 <1200px) ========== */
@media screen and (min-width: 992px) and (max-width: 1199px) {
    .container {
        max-width: 960px;
    }
    
    .hero-content h2 {
        font-size: 2.5rem;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ========== 平板竖屏 (≥768px 且 <992px) ========== */
@media screen and (min-width: 768px) and (max-width: 991px) {
    .container {
        max-width: 720px;
    }
    
    .hero-section .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content {
        margin-bottom: var(--spacing-lg);
    }
    
    .hero-content h2 {
        font-size: 2.2rem;
    }
    
    .hero-content p {
        max-width: 100%;
    }
    
    .hero-image {
        width: 80%;
        margin: 0 auto;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .nav-menu {
        gap: var(--spacing-md);
    }
    
    .nav-menu a span {
        display: none;
    }
    
    .nav-menu a i {
        font-size: 1.3rem;
    }
}

/* ========== 手机横屏/小平板 (≥576px 且 <768px) ========== */
@media screen and (min-width: 576px) and (max-width: 767px) {
    .container {
        max-width: 540px;
        padding: 0 var(--spacing-sm);
    }
    
    .hero-section {
        padding: var(--spacing-lg) 0;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .hero-image img {
        height: 250px;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .advantages-grid {
        grid-template-columns: repeat(1, 1fr);
        gap: var(--spacing-md);
    }
    
    .advantage-card {
        padding: var(--spacing-md);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    
    /* 导航栏移动端适配 */
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        border-radius: 0 0 var(--radius-lg) var(--radius-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        z-index: 999;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu a {
        padding: var(--spacing-sm);
        justify-content: flex-start;
    }
    
    .nav-menu a span {
        display: inline;
    }
    
    .mobile-menu-btn {
        display: block;
    }
}

/* ========== 手机竖屏 (<576px) ========== */
@media screen and (max-width: 575px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    html {
        font-size: 14px;
    }
    
    .logo h1 {
        font-size: 1.25rem;
    }
    
    .hero-section {
        padding: var(--spacing-lg) 0;
    }
    
    .hero-section .container {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-lg);
    }
    
    .hero-content h2 {
        font-size: 1.8rem;
        margin-bottom: var(--spacing-sm);
    }
    
    .hero-content p {
        font-size: 0.95rem;
        margin-bottom: var(--spacing-md);
    }
    
    .hero-image {
        width: 100%;
    }
    
    .hero-image img {
        height: 200px;
    }
    
    .section-title {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-lg);
    }
    
    .products-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .product-card {
        max-width: 320px;
        margin: 0 auto;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .advantage-card {
        padding: var(--spacing-md);
    }
    
    .advantage-icon {
        width: 60px;
        height: 60px;
    }
    
    .advantage-icon i {
        font-size: 1.5rem;
    }
    
    .footer {
        padding: var(--spacing-lg) 0 var(--spacing-sm);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .footer-section {
        margin-bottom: var(--spacing-md);
    }
    
    .social-links {
        justify-content: center;
    }
    
    .footer-bottom {
        font-size: 0.8rem;
        padding-top: var(--spacing-sm);
    }
    
    /* 导航栏移动端适配 */
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        border-radius: 0 0 var(--radius-lg) var(--radius-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        z-index: 999;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu a {
        padding: var(--spacing-sm);
        justify-content: flex-start;
    }
    
    .nav-menu a span {
        display: inline;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    /* 显示底部导航 */
    .bottom-nav {
        display: flex;
    }
    
    /* 调整主体内容底部间距，避免被底部导航遮挡 */
    .main-content {
        padding-bottom: 60px;
    }
    
    /* 调整页脚间距 */
    .footer {
        padding-bottom: 70px;
    }
}

/* ========== 超小屏幕 (<375px) ========== */
@media screen and (max-width: 374px) {
    html {
        font-size: 13px;
    }
    
    .hero-content h2 {
        font-size: 1.6rem;
    }
    
    .btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }
    
    .product-info {
        padding: var(--spacing-sm);
    }
    
    .product-price {
        font-size: 1.3rem;
    }
    
    .advantage-card {
        padding: var(--spacing-sm);
    }
    
    .footer-bottom p {
        font-size: 0.75rem;
    }
}

/* ========== 打印样式 ========== */
@media print {
    .header,
    .footer,
    .bottom-nav,
    .mobile-menu-btn {
        display: none !important;
    }
    
    body {
        background-color: white;
        color: black;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
    
    .btn {
        display: none;
    }
}

/* ========== 深色模式支持 ========== */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #2d3748;
        --secondary-color: #4299e1;
        --accent-color: #4a5568;
        --light-color: #1a202c;
        --text-color: #e2e8f0;
        --text-light: #a0aec0;
        --white: #2d3748;
    }
    
    body {
        background-color: #1a202c;
    }
    
    .card,
    .product-card,
    .advantage-card {
        background-color: var(--white);
        border-color: #4a5568;
    }
    
    .form-control {
        background-color: #2d3748;
        border-color: #4a5568;
        color: var(--text-color);
    }
    
    .table {
        background-color: #2d3748;
    }
    
    .table th {
        background-color: #4a5568;
        color: var(--text-color);
    }
    
    .table td {
        color: var(--text-color);
        border-color: #4a5568;
    }
    
    .table tbody tr:hover {
        background-color: rgba(66, 153, 225, 0.1);
    }
}

/* ========== 触摸设备优化 ========== */
@media (hover: none) and (pointer: coarse) {
    .btn:hover,
    .card:hover,
    .product-card:hover,
    .advantage-card:hover {
        transform: none;
    }
    
    .nav-menu a:hover {
        background-color: transparent;
    }
    
    .btn-primary:hover,
    .btn-outline:hover {
        transform: none;
        box-shadow: none;
    }
    
    /* 增加触摸目标尺寸 */
    .btn {
        min-height: 44px;
        min-width: 44px;
    }
    
    .nav-menu a {
        min-height: 44px;
        min-width: 44px;
    }
    
    .mobile-menu-btn {
        min-height: 44px;
        min-width: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .bottom-nav a {
        min-height: 60px;
    }
}

/* ========== 高对比度模式支持 ========== */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000000;
        --secondary-color: #0000ff;
        --accent-color: #333333;
        --text-color: #000000;
        --text-light: #333333;
    }
    
    .btn-primary {
        border: 2px solid var(--primary-color);
    }
    
    .btn-outline {
        border: 2px solid var(--secondary-color);
    }
    
    .card,
    .product-card,
    .advantage-card {
        border: 2px solid var(--accent-color);
    }
}

/* ========== 减少动画支持 ========== */
@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;
    }
    
    .fade-in {
        animation: none;
    }
    
    .hero-image:hover img,
    .product-card:hover .product-image img {
        transform: none;
    }
    
    .product-card:hover,
    .advantage-card:hover,
    .btn:hover {
        transform: none;
    }
}