/* 全局样式 */
:root {
    --primary-color: #0056b3;
    --secondary-color: #00a0e9;
    --accent-color: #17c671;
    --text-color: #2c3e50;
    --light-gray: #f8f9fa;
    --dark-gray: #343a40;
}

body {
    font-family: "Helvetica Neue", "思源黑体", sans-serif;
    color: var(--text-color);
    line-height: 1.6;
}

/* 通用样式 */
.section-subtitle {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 3rem;
}

.btn-lg {
    padding: 0.8rem 2rem;
    font-size: 1.1rem;
}

/* 导航栏样式 */
.navbar {
    padding: 0.5rem 0;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    background-color: rgba(255,255,255,0.95) !important;
}

.navbar.scrolled {
    padding: 0.5rem 0;
}

.logo {
    height: 50px;
    width: auto;
}

.nav-link {
    font-weight: 500;
    color: var(--text-color) !important;
    padding: 1.5rem 1rem !important;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

/* 首页大图轮播 */
.hero-section {
    position: relative;
    margin-top: 90px;
    width: 100%;
    height: 800px;
}

.swiper-container {
    width: 100%;
    height: 100%;
}

.swiper-slide {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.swiper-slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.4);
}

.hero-content {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    max-width: 800px;
    padding: 2rem;
    color: white;
    text-align: center;
    z-index: 2;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.swiper-button-next,
.swiper-button-prev {
    color: white !important;
}

.swiper-pagination-bullet {
    width: 12px;
    height: 12px;
    background: white;
    opacity: 0.7;
}

.swiper-pagination-bullet-active {
    background: var(--primary-color);
    opacity: 1;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .navbar {
        padding: 0.5rem 0;
    }
    
    .nav-link {
        padding: 0.5rem 1rem !important;
    }
    
    .hero-section {
        height: 500px;
    }
    
    .hero-content {
        padding: 1rem;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1.1rem;
    }
}

/* 关于我们部分 */
.about-section {
    padding: 100px 0;
    background-color: var(--light-gray);
    position: relative;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--dark-gray);
}

.section-description {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 2rem;
}

.company-stats {
    display: flex;
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    flex: 1;
}

.stat-item h3 {
    font-size: 2.5rem;
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-item p {
    color: #666;
    margin: 0;
}

.about-image {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    margin-left: 100px;
    width: 100%;
    height: 400px;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 产品展示部分 */
.products-section {
    padding: 100px 0;
}

.product-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
    margin-bottom: 30px;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-10px);
}

.product-image {
    position: relative;
    width: 100%;
    padding-top: 100%; /* 1:1 比例 */
    overflow: hidden;
}

.product-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    background-color: #fff;
    transition: transform 0.3s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-info {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.product-info h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--dark-gray);
}

.product-info p {
    color: #666;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.product-info .btn {
    align-self: flex-start;
}

/* 应用领域部分 */
.applications-section {
    padding: 100px 0;
    background-color: var(--light-gray);
}

.application-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.application-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.application-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.application-item .icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    color: var(--primary-color);
}

.application-item h3 {
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

.application-item p {
    color: #666;
    margin: 0;
}

/* 新闻动态部分 */
.news-section {
    padding: 100px 0;
}

.news-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    height: 100%;
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-5px);
}

.news-image {
    width: 100%;
    padding-top: 66.67%;
    position: relative;
    overflow: hidden;
}

.news-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.news-card:hover .news-image img {
    transform: scale(1.1);
}

.news-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-date {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.news-content h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--dark-gray);
}

.news-content p {
    color: #666;
    margin-bottom: 1.5rem;
}

.read-more {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.read-more:hover {
    color: var(--secondary-color);
}

.read-more i {
    transition: transform 0.3s ease;
}

.read-more:hover i {
    transform: translateX(5px);
}

/* 联系我们部分 */
.contact-section {
    padding: 100px 0;
    background-color: var(--light-gray);
}

.contact-info {
    margin-bottom: 2rem;
}

.info-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 2rem;
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-right: 1rem;
    margin-top: 0.25rem;
}

.info-content h4 {
    font-size: 1.1rem;
    color: var(--dark-gray);
    margin-bottom: 0.5rem;
}

.info-content p {
    color: #666;
    margin-bottom: 0.25rem;
}

.contact-form {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-control {
    padding: 0.75rem;
    border-radius: 5px;
    border: 1px solid #ddd;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0,86,179,0.25);
}

/* 页脚样式 */
.footer {
    background-color: var(--dark-gray);
    color: white;
    padding: 60px 0 30px;
}

.footer-logo {
    height: 40px;
    margin-bottom: 1rem;
}

.footer h4 {
    color: white;
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--secondary-color);
}

.footer-contact {
    list-style: none;
    padding: 0;
}

.footer-contact li {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    color: rgba(255,255,255,0.8);
}

.footer-contact li i {
    margin-right: 0.75rem;
    color: var(--secondary-color);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-links a {
    color: white;
    font-size: 1.5rem;
    transition: all 0.3s ease;
}

.social-links a:hover {
    color: var(--secondary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255,255,255,0.6);
    margin-bottom: 0.5rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .company-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .application-grid {
        grid-template-columns: 1fr;
    }
    
    .news-image {
        height: auto;
    }
    
    .contact-form {
        margin-top: 2rem;
    }
    
    .about-image {
        height: 300px;
        margin-left: 0;
    }
    
    .hero-section {
        height: 400px;
    }
    
    .product-image {
        height: auto;
    }
}

/* 动画效果 */
[data-aos] {
    pointer-events: none;
}

[data-aos].aos-animate {
    pointer-events: auto;
}

/* 加载动画 */
.loaded {
    opacity: 1;
    transition: opacity 0.3s ease;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

.back-to-top i {
    font-size: 20px;
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }
    
    .back-to-top i {
        font-size: 16px;
    }
}