/* 全局样式重置和基础设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #fff;
    --secondary-color: #fff;
    --text-dark: #333;
    --text-light: #666;
    --bg-light: #f3f4f6;
    --white: #ffffff;
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
 .navbar {
    position: fixed;
    top: 0;
    width: 100%;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition);
    background-color: rgb(54, 159, 242);
    color: rgb(255, 255, 255);
}
 
.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 10px;

}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.logo img {
    width: auto;
    height: 60px;
}

.nav-links {
    background-color: rgb(0, 87, 180);
    position: absolute;
    top: 75px;

    left: 0;
    width: 100%;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition);
    display: flex;
    justify-content: center;
    /* 水平居中 */
    align-items: center;
    /* 垂直居中 */
    list-style: none;
    gap: 0.5rem;
}

.nav-links li {
    padding-top: 27px;
    padding-bottom: 27px;
}

.nav-links a {
    height: 100%;
    text-decoration: none;
    color: var(--white);
    font-weight: 500;
    transition: var(--transition);
    padding-left: 30px;
    padding-right: 30px;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.nav-links a.active {
    color: var(--white);
    font-weight: 600;
}

.nav-links li:has(a.active) {
    background: rgb(28, 113, 204);

}

.nav-links a.active::after {
    display: none;
}

/* 语言切换器样式 */
.language-switcher {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-right: 1.5rem;
}

.lang-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    padding: 0.3rem 0.5rem;
    color: var(--text-dark);
    transition: var(--transition);
    border-radius: 4px;
}

.lang-btn:hover {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
}

.lang-btn.active {
    color: var(--primary-color);
    font-weight: 600;
}

.lang-divider {
    color: var(--text-light);
    opacity: 0.5;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: var(--transition);
}

/* 轮播图样式 */
.carousel-section {
    margin-top: 70px;
    position: relative;
    overflow: hidden;
}

.carousel {
    position: relative;
    width: 100%;
    height: 600px;
    overflow: hidden;
}

.carousel-track {
    display: flex;
    transition: transform 0.5s ease-in-out;
    height: 100%;
}

.carousel-slide {
    min-width: 100%;
    position: relative;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.carousel-caption {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--white);
    background: rgba(0, 0, 0, 0.5);
    padding: 2rem 3rem;
    border-radius: 10px;
    width: 80%;
    max-width: 800px;
}

.carousel-caption h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.carousel-caption p {
    font-size: 1.2rem;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    border: none;
    font-size: 2rem;
    padding: 1rem 1.2rem;
    cursor: pointer;
    border-radius: 50%;
    transition: var(--transition);
    z-index: 10;
}

.carousel-btn:hover {
    background: rgba(255, 255, 255, 0.9);
}

.prev-btn {
    left: 20px;
}

.next-btn {
    right: 20px;
}

.carousel-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background: var(--white);
    transform: scale(1.2);
}

/* 通用区域样式 */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    margin: 1rem auto 0;
}

section {
    padding: 5rem 0;
}

/* 企业介绍区域 */
.about-section {
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: top;
}

.about-text h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.about-text p {
    margin-bottom: 1rem;
    line-height: 1.8;
    color: var(--text-light);
}

.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.stat-item {
    text-align: center;
}

.stat-item h4 {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.stat-item p {
    color: var(--text-light);
    font-size: 0.9rem;
}

.about-image img {
    width: 100%;
    height: 230px;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* 主营业务区域 */
.business-section {
    background: var(--bg-light);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.business-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.business-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.business-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.business-content {
    padding: 1.5rem;
}

.business-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.business-content {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.business-content p {
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.read-more {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

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

/* 产品介绍区域 */
.products-section {
    background: var(--white);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.product-card {
    background: var(--bg-light);
    border-radius: 10px;
    overflow: hidden;
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.product-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.product-info {
    padding: 1.5rem;
}

.product-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.product-info>p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.product-features {
    list-style: none;
}

.product-features li {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

/* 联系我们区域 */
.contact-section {
    background: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.contact-item p {
    color: var(--text-light);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
    box-sizing: border-box;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.submit-btn {
    background: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 1rem 2rem;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.submit-btn:hover {
    background: var(--secondary-color);
}

/* 页脚 */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 3rem 0 1rem;
}

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

.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.footer-section p {
    line-height: 1.8;
    opacity: 0.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-section a:hover {
    opacity: 1;
    color: var(--primary-color);
}

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

.social-links a {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.8;
}

/* 响应式设计 - 平板设备 */
@media (max-width: 1024px) {

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-image {
        order: -1;
    }

    .stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .carousel {
        height: 500px;
    }

    .carousel-caption {
        padding: 1.5rem 2rem;
        width: 90%;
    }

    .carousel-caption h2 {
        font-size: 2rem;
    }
}

/* 响应式设计 - 移动设备 */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .logo {
        order: 1;
    }
    
    .hamburger {
        display: flex;
        order: 3;
    }
    
    .language-switcher {
        display: none;
        order: 2;
    }
    
    .nav-links {
        order: 4;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        color: var(--text-light);
        background-color: rgb(0, 87, 180);
        flex-direction: column;
        padding: 1rem 0;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        z-index: 999;
    }
    
    .language-switcher {
        display: none;
    }
    
    .nav-links.active ~ .language-switcher {
        display: flex;
        justify-content: center;
        margin-top: 1rem;
        padding: 0.5rem 0;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-links.active ~ .language-switcher .lang-btn {
        color: var(--text-light);
        font-size: 0.85rem;
        padding: 0.4rem 0.6rem;
    }
    
    .nav-links.active ~ .language-switcher .lang-btn:hover,
    .nav-links.active ~ .language-switcher .lang-btn.active {
        color: var(--white);
        background: rgba(255, 255, 255, 0.1);
    }
    
    .nav-links.active ~ .language-switcher .lang-divider {
        color: var(--text-light);
        opacity: 0.5;
    }

    .nav-links .line-divider {
        display: none;
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        color: var(--text-light);
    }

    .nav-links li {
        text-align: center;
        padding: 0.8rem 0;
        color: var(--text-light);
    }

    .carousel {
        height: 400px;
    }

    .carousel-caption {
        padding: 1rem;
        bottom: 60px;
    }

    .carousel-caption h2 {
        font-size: 1.5rem;
    }

    .carousel-caption p {
        font-size: 1rem;
    }

    .carousel-btn {
        padding: 0.5rem 0.8rem;
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .about-text h3 {
        font-size: 1.5rem;
    }

    .stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .stat-item h4 {
        font-size: 2rem;
    }

    .business-grid,
    .products-grid {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 0 1rem;
    }
    
    .contact-info,
    .contact-form {
        width: 100%;
        min-width: 0;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .social-links {
        justify-content: center;
    }
}

/* 响应式设计 - 小屏手机 */
@media (max-width: 480px) {
    .carousel {
        height: 300px;
    }

    .carousel-caption {
        display: none;
    }

    .logo {
        font-size: 1.2rem;
    }

    section {
        padding: 3rem 0;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .about-text p {
        font-size: 0.95rem;
    }

    .stat-item h4 {
        font-size: 1.5rem;
    }

    .stat-item p {
        font-size: 0.85rem;
    }
}