/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 头部样式 */
header {
    background-color: #fff;
    box-shadow: 0 2px 15px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.top-bar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 8px 0;
    color: white;
}

.contact-info {
    display: flex;
    justify-content: flex-end;
    gap: 25px;
    font-size: 14px;
    color: #fff;
}

.contact-info span {
    display: flex;
    align-items: center;
}

.contact-info span::before {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-right: 8px;
    background-size: contain;
    background-repeat: no-repeat;
}

.contact-info span:nth-child(1)::before {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="white"><path d="M12 2C8.13 2 5 5.13 5 9c0 5.25 7 13 7 13s7-7.75 7-13c0-3.87-3.13-7-7-7zm0 9.5c-1.38 0-2.5-1.12-2.5-2.5s1.12-2.5 2.5-2.5 2.5 1.12 2.5 2.5-1.12 2.5-2.5 2.5z"/></svg>');
}

.contact-info span:nth-child(2)::before {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="white"><path d="M6.62 10.79c1.44 2.83 3.76 5.14 6.59 6.59l2.2-2.2c.27-.27.67-.36 1.02-.24 1.12.37 2.33.57 3.57.57.55 0 1 .45 1 1V20c0 .55-.45 1-1 1-9.39 0-17-7.61-17-17 0-.55.45-1 1-1h3.5c.55 0 1 .45 1 1 0 1.25.2 2.45.57 3.57.11.35.03.74-.25 1.02l-2.2 2.2z"/></svg>');
}

.contact-info span:nth-child(3)::before {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="white"><path d="M20 4H4c-1.1 0-1.99.9-1.99 2L2 18c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V6c0-1.1-.9-2-2-2zm0 4l-8 5-8-5V6l8 5 8-5v2z"/></svg>');
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo img {
    height: 60px;
    width: auto;
    transition: transform 0.3s ease;
}

.logo img:hover {
    transform: scale(1.05);
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 35px;
    position: relative;
}

nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: 600;
    transition: all 0.3s;
    font-size: 18px;
    position: relative;
    padding: 5px 0;
}

/* 可访问性焦点样式 */
*:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

nav ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 3px;
    bottom: 0;
    left: 0;
    background-color: #667eea;
    transition: width 0.3s ease;
}

nav ul li a:hover {
    color: #667eea;
}

nav ul li a:hover::after {
    width: 100%;
}

nav ul li a.active {
    color: #667eea;
    font-weight: bold;
}

nav ul li a.active::after {
    width: 100%;
    background-color: #667eea;
}

/* 下拉菜单样式 */
.dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu {
    display: block;
    opacity: 0;
    visibility: hidden;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #fff;
    min-width: 220px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    z-index: 1000;
    border-radius: 8px;
    padding: 15px 0;
    transition: all 0.3s ease;
    transform: translateY(10px);
}

.dropdown-menu li {
    margin: 0;
    display: block;
}

.dropdown-menu li a {
    padding: 12px 25px;
    display: block;
    font-size: 15px;
    color: #333;
    text-decoration: none;
    transition: all 0.3s;
    position: relative;
}

.dropdown-menu li a::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background-color: #667eea;
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.3s;
}

.dropdown-menu li a:hover {
    background-color: #f8f9fa;
    color: #667eea;
    padding-left: 35px;
}

.dropdown-menu li a:hover::before {
    opacity: 1;
}

/* 主要内容区域 */
main {
    margin-top: 120px;
}

/* 移动端顶部间距优化 */
@media (max-width: 768px) {
    main {
        margin-top: 80px;
    }
}

/* 超小屏幕顶部间距优化 */
@media (max-width: 360px) {
    main {
        margin-top: 80px;
    }
}

/* 面包屑导航样式已移除 */

/* 延迟加载图片 */
img.lazy {
    opacity: 0;
    transition: opacity 0.3s;
}

img.lazy.loaded {
    opacity: 1;
}

/* Banner区域 */
.banner {
    background-color: #f8f9fa;
    padding: 150px 0;
    text-align: center;
    background-image: linear-gradient(rgba(102, 126, 234, 0.8), rgba(118, 75, 162, 0.8)), url('../images/banner.jpg');
    background-size: cover;
    background-position: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.banner .container {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.banner-subtitle {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: #fff;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 2px;
    animation: fadeInUp 1s ease;
}

.banner-title {
    font-size: 3rem;
    margin-bottom: 25px;
    color: #fff;
    font-weight: 700;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
    animation: fadeInUp 1s ease 0.2s both;
}

.banner-quote {
    font-size: 1.8rem;
    margin-bottom: 25px;
    color: #fff;
    font-style: italic;
    font-weight: 600;
    animation: fadeInUp 1s ease 0.4s both;
}

.banner-description {
    font-size: 1.3rem;
    color: #f0f0f0;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
    animation: fadeInUp 1s ease 0.6s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 公司介绍 */
.about-company {
    padding: 100px 0;
    background-color: #fff;
}

.about-content h2 {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 40px;
    text-align: center;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.about-content h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.about-content h3 {
    font-size: 1.8rem;
    color: #333;
    margin: 50px 0 25px;
    position: relative;
    padding-bottom: 15px;
}

.about-content h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.about-content p {
    font-size: 1.1rem;
    color: #666;
    line-height: 1.8;
    margin-bottom: 25px;
    text-align: justify;
}

.team-image {
    text-align: center;
    margin: 50px 0;
    position: relative;
}

.team-image img {
    max-width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
    transition: transform 0.3s ease;
}

.team-image img:hover {
    transform: scale(1.02);
}

/* 企业文化 */
.company-culture {
    padding: 100px 0;
    background-color: #f8f9fa;
}

.company-culture h2 {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 60px;
    text-align: center;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.company-culture h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.culture-item {
    background: #fff;
    border-radius: 15px;
    padding: 40px 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    text-align: center;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.culture-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: height 0.4s ease;
    z-index: 0;
}

.culture-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.2);
}

.culture-item:hover::before {
    height: 100%;
}

.culture-item:hover h3,
.culture-item:hover p {
    color: #fff;
    position: relative;
    z-index: 1;
}

.culture-item h3 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.5rem;
    transition: color 0.4s ease;
    position: relative;
}

.culture-item h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: background 0.4s ease;
}

.culture-item:hover h3::after {
    background: #fff;
}

.culture-item p {
    color: #666;
    line-height: 1.7;
    transition: color 0.4s ease;
    position: relative;
    z-index: 1;
}

/* 发展历程 */
.company-history {
    padding: 100px 0;
    background-color: #fff;
}

.company-history h2 {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 60px;
    text-align: center;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.company-history h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.history-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.history-timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, #667eea, #764ba2);
    left: 50%;
    margin-left: -2px;
    border-radius: 2px;
}

.history-item {
    position: relative;
    margin-bottom: 50px;
    width: 100%;
}

.history-item:nth-child(odd) {
    padding-right: calc(50% + 30px);
    text-align: right;
}

.history-item:nth-child(even) {
    padding-left: calc(50% + 30px);
}

.history-date {
    font-size: 1.3rem;
    font-weight: 600;
    color: #667eea;
    margin-bottom: 15px;
    display: inline-block;
    padding: 8px 20px;
    background: #f8f9fa;
    border-radius: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.history-content {
    background: #fff;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    position: relative;
}

.history-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.15);
}

.history-content::before {
    content: '';
    position: absolute;
    top: 20px;
    width: 20px;
    height: 20px;
    background: #667eea;
    border-radius: 50%;
    z-index: 1;
}

.history-item:nth-child(odd) .history-content::before {
    right: -50px;
}

.history-item:nth-child(even) .history-content::before {
    left: -50px;
}

.history-content h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.4rem;
}

.history-content p {
    color: #666;
    line-height: 1.7;
}

/* 服务区域 */
.services {
    padding: 100px 0;
    background-color: #fff;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-subtitle {
    color: #667eea;
    font-weight: 600;
    margin-bottom: 15px;
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-title h2 {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.section-description {
    color: #666;
    font-size: 1.2rem;
    max-width: 700px;
    margin: 30px auto 0;
    line-height: 1.7;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.service-card {
    background: #fff;
    border-radius: 15px;
    padding: 40px 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    transition: all 0.4s ease;
    border: none;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: height 0.4s ease;
    z-index: -1;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.2);
}

.service-card:hover::before {
    height: 100%;
}

.service-card:hover h3,
.service-card:hover p {
    color: #fff;
}

.service-card h3 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.5rem;
    position: relative;
    transition: color 0.4s ease;
}

.service-card h3::before {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 40px;
    height: 3px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.service-card p {
    color: #666;
    line-height: 1.7;
    transition: color 0.4s ease;
}

/* 产品中心 */
.products {
    background-color: #f8f9fa;
    padding: 100px 0;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.product-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    transition: all 0.4s ease;
    position: relative;
    transform: translateY(0);
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.2);
}

.product-img {
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.product-img::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    opacity: 0;
    transition: opacity 0.4s ease;
}

.product-card:hover .product-img::before {
    opacity: 1;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.product-card:hover .product-img img {
    transform: scale(1.05);
}

.product-info {
    padding: 30px;
    text-align: center;
}

.product-info h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.4rem;
    transition: color 0.4s ease;
}

.product-card:hover .product-info h3 {
    color: #667eea;
}

.product-info p {
    color: #666;
    line-height: 1.7;
    font-size: 0.95rem;
}

/* 统计数据 */
.stats {
    padding: 100px 0;
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 70%);
    transform: rotate(30deg);
}

.stats-content h2 {
    font-size: 2.5rem;
    margin-bottom: 50px;
    position: relative;
    font-weight: 600;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    position: relative;
    z-index: 1;
}

.stat-item h3 {
    font-size: 3rem;
    margin-bottom: 15px;
    font-weight: 700;
    background: linear-gradient(to right, #fff, #f0f0f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-item p {
    font-size: 1.2rem;
    font-weight: 500;
    opacity: 0.9;
}

/* 合作伙伴 */
.partners {
    padding: 100px 0;
    background-color: #fff;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 40px;
    align-items: center;
}

.partner-logo {
    height: 100px;
    background-color: #f8f9fa;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    padding: 20px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.partner-logo::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.partner-logo:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.15);
}

.partner-logo:hover::before {
    opacity: 1;
}

.partner-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.partner-logo:hover img {
    transform: scale(1.05);
}

/* 页脚 */
footer {
    background: linear-gradient(135deg, #333 0%, #222 100%);
    color: white;
    padding: 70px 0 30px;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h2 {
    margin-bottom: 25px;
    font-size: 1.4rem;
    position: relative;
    padding-bottom: 15px;
    color: #fff;
}

.footer-section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.footer-section p {
    margin-bottom: 12px;
    color: #ccc;
    transition: color 0.3s ease;
}

.footer-section p:hover {
    color: #fff;
}

.footer-section p a {
    color: #ccc;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    padding: 2px 0;
}

.footer-section p a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: #667eea;
    transition: width 0.3s ease;
}

.footer-section p a:hover {
    color: #667eea;
}

.footer-section p a:hover::after {
    width: 100%;
}

.contact-details p {
    line-height: 1.8;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #444;
    color: #aaa;
    font-size: 0.95rem;
}

.footer-bottom img {
    vertical-align: middle;
    margin-right: 8px;
}

.footer-bottom a {
    color: #aaa;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-bottom a:hover {
    color: #fff;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 5px 0;
        height: 60px;
    }
    
    .logo {
        margin: 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
        order: 2;
    }
    
    nav {
        order: 3;
    }
    
    nav ul {
        margin-top: 0;
        flex-wrap: nowrap;
        justify-content: flex-start;
    }
    
    nav ul li {
        margin: 0 10px;
    }
    
    .banner {
        padding: 80px 0;
    }
    
    .banner-subtitle {
        font-size: 1.2rem;
    }
    
    .banner-title {
        font-size: 2rem;
    }
    
    .banner-quote {
        font-size: 1.4rem;
    }
    
    .banner-description {
        font-size: 1rem;
    }
    
    .banner-btn {
        padding: 12px 30px;
        font-size: 1rem;
    }
    
    main {
        margin-top: 80px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        flex-direction: column;
        align-items: center;
        gap: 8px;
        font-size: 13px;
    }
    
    .culture-grid {
        grid-template-columns: 1fr;
    }
    
    .history-timeline::before {
        left: 31px;
    }
    
    .history-item:nth-child(odd),
    .history-item:nth-child(even) {
        padding-left: 70px;
        padding-right: 0;
        text-align: left;
    }
    
    .history-item::before {
        left: 16px;
        margin-left: 0;
        margin-top: 10px;
    }
    
    .services-grid,
    .products-grid,
    .partners-grid {
        gap: 25px;
    }
    
    .service-card,
    .product-card {
        padding: 30px 20px;
    }
    
    .footer-content {
        gap: 30px;
    }
    
    /* 移动端触摸优化 */
    .product-card,
    .service-card,
    .partner-logo,
    .culture-item,
    .history-content {
        cursor: pointer;
        -webkit-tap-highlight-color: transparent;
    }
    
    /* 移动端图片优化 */
    .product-img,
    .team-image {
        height: auto;
    }
    
    .product-img img {
        height: auto;
        object-fit: contain;
    }
    
    /* 移动端表单优化（如果有的话） */
    input, textarea, button {
        -webkit-appearance: none;
        border-radius: 0;
    }
    
    /* 移动端点击延迟优化 */
    a, button {
        -webkit-tap-highlight-color: rgba(0,0,0,0.1);
    }
    
    /* 移动端滚动优化 */
    html {
        -webkit-overflow-scrolling: touch;
    }
    
    /* 移动端字体优化 */
    body {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    
    /* 移动端按钮优化 */
    button, .btn {
        min-height: 44px;
        min-width: 44px;
    }
}

/* 超小屏幕优化 */
@media (max-width: 360px) {
    .container {
        width: 95%;
        padding: 0 10px;
    }
    
    .logo img {
        height: 50px;
    }
    
    .banner {
        padding: 60px 0;
    }
    
    .banner-title {
        font-size: 1.8rem;
    }
    
    .banner-quote {
        font-size: 1.2rem;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
    
    .services-grid,
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    nav ul li {
        margin: 5px;
    }
    
    nav ul li a {
        font-size: 16px;
    }
    
    .dropdown-menu {
        min-width: 180px;
    }
    
    .dropdown-menu li a {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    /* 移动端优化 */
    .product-card {
        transition: none;
    }
    
    .product-card:hover {
        transform: none;
        box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    }
    
    .service-card {
        transition: none;
    }
    
    .service-card:hover {
        transform: none;
        box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    }
    
    .partner-logo {
        transition: none;
    }
    
    .partner-logo:hover {
        transform: none;
        box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    }
    
    .culture-item {
        transition: none;
    }
    
    .culture-item:hover {
        transform: none;
        box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    }
    
    .history-content {
        transition: none;
    }
    
    .history-content:hover {
        transform: none;
        box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    }
    
    /* 移动端面包屑导航优化 */
    .breadcrumb {
        padding: 10px 0;
        font-size: 0.8rem;
    }
    
    .breadcrumb a {
        padding-right: 15px;
    }
}

#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 1000;
}

#backToTop:focus {
    outline: 2px solid #fff;
    outline-offset: 2px;
    box-shadow: 0 0 0 3px #667eea;
}

#backToTop:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

#backToTop.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

#backToTop svg {
    width: 24px;
    height: 24px;
}

/* 移动端导航菜单优化 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 30px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 100%;
    height: 3px;
    background: #333;
    border-radius: 10px;
    transition: all 0.3s ease;
    position: relative;
    transform-origin: center;
}

/* 移动端菜单展开状态 */
.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* 移动端下拉菜单优化 */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    nav {
        display: none;
    }
    
    nav.active {
        display: block;
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        height: calc(100vh - 60px);
        background: #fff;
        flex-direction: column;
        align-items: center;
        padding-top: 20px;
        transition: all 0.3s ease;
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        z-index: 1000;
        overflow-y: auto;
    }
    
    nav ul {
        position: static;
        width: 100%;
        height: auto;
        flex-direction: column;
        align-items: center;
        padding-top: 0;
    }
    
    nav ul.active {
        display: block;
    }
    
    nav ul li {
        margin: 15px 0;
        width: 100%;
        text-align: center;
    }
    
    nav ul li a {
        font-size: 18px;
        padding: 15px 0;
        display: block;
        width: 100%;
    }
    
    .dropdown:hover .dropdown-menu {
        display: none;
    }
    
    .dropdown.active .dropdown-menu {
        display: block;
        position: static;
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        box-shadow: none;
        background: #f8f9fa;
        border-radius: 0;
        padding: 10px 0;
        min-width: 100%;
        margin-top: 10px;
    }
    
    .dropdown-menu li a {
        text-align: center;
        padding: 12px 0;
    }
    
    .dropdown-menu li a::before {
        left: 50%;
        transform: translateX(-50%) translateY(-50%);
    }
    
    .dropdown-menu li a:hover {
        padding-left: 0;
    }
}

/* 高分辨率屏幕优化 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    /* 优化图片在高分辨率屏幕上的显示 */
    img {
        image-rendering: -webkit-optimize-contrast;
    }
}