/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100px;
}

.nav-logo {
    display: flex;
    align-items: center;
    position: relative;
    z-index: 1001;
}

.nav-logo img {
    position: relative;
    z-index: 1002;
    width: 40px;
    height: 40px;
    margin-right: 10px;
}

.company-names {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
}

.company-names h2 {
    color: #2c3e50;
    font-size: 28px;
    font-weight: 800;
    margin: 0;
    line-height: 1.05;
    text-transform: uppercase;
}

.company-english {
    color: #7f8c8d;
    font-size: 14px;
    font-weight: 700;
    white-space: nowrap;
    line-height: 1.1;
    text-transform: uppercase;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    font-size: 18px;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    color: #3498db;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #3498db;
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #2c3e50;
    margin: 3px 0;
    transition: 0.3s;
}

.lang-btn {
    background: #3498db;
    color: white;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 34px;
    min-width: 56px;
    padding: 0 12px;
    border-radius: 22px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
}

/* 主页横幅 */
.hero {
    height: 75vh;
    position: relative;
    overflow: hidden;
    margin-top: 100px;
}

.hero-carousel {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-slide.active {
    opacity: 1;
}

.hero-slide img {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}

.hero-slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 2;
}

.hero-slide-content {
    position: absolute;
    top: 55%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 3;
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 0 20px;
    width: 100%;
}

.hero-slide-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 30px;
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 1s ease;
}

.hero-nav {
    position: absolute;
    top: 55%;
    transform: translateY(-50%);
    width: 100%;
    z-index: 4;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 50px;
    box-sizing: border-box;
}

.hero-prev, .hero-next {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.4rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-prev:hover, .hero-next:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.hero-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 4;
}

.hero-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

/* 图片模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 800px;
    max-height: 90%;
    animation: zoomIn 0.3s ease;
}

.modal-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1002;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0;
    pointer-events: none;
}

.modal-prev {
    position: fixed;
    left: 8px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1005;
}

.modal-next {
    position: fixed;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1005;
}

.modal-prev, .modal-next {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    transition: background 0.2s ease, opacity 0.2s ease;
    backdrop-filter: blur(10px);
    pointer-events: auto;
}

.modal-prev:hover, .modal-next:hover {
    background: rgba(255, 255, 255, 0.3);
    opacity: 0.95;
}

.modal-content img {
    width: 100%;
    height: auto;
    max-height: 90vh;
    object-fit: contain;
}

.close {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    z-index: 1001;
}

.close:hover,
.close:focus {
    color: #bbb;
    text-decoration: none;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes zoomIn {
    from { opacity: 0; transform: translate(-50%, -50%) scale(0.98); }
    to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}



/* 轮播图 */
.carousel-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.carousel-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #2c3e50;
}

.carousel {
    position: relative;
    width: 100%;
    margin: 0 auto;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.carousel-container {
    display: flex;
    transition: transform 0.5s ease;
}

.carousel-slide {
    min-width: 100%;
    position: relative;
    height: 500px;
}

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

.slide-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
    padding: 40px;
    text-align: center;
}

.slide-content h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.9);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    color: #2c3e50;
    transition: all 0.3s ease;
    z-index: 10;
}

.carousel-btn:hover {
    background: white;
    transform: translateY(-50%) scale(1.1);
}

.carousel-btn.prev {
    left: 20px;
}

.carousel-btn.next {
    right: 20px;
}

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

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

/* 产品分类 */
.products {
    padding: 120px 0 80px 0;
    background: white;
    min-height: calc(100vh - 200px);
}

.products h1 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #2c3e50;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 400px);
    gap: 30px;
    margin-top: 50px;
    justify-content: center;
}

.product-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    width: 400px;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.product-image {
    height: 200px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}



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

.product-info {
    padding: 25px;
}

.product-info h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: #2c3e50;
}

.product-info p {
    color: #7f8c8d;
    margin-bottom: 15px;
    line-height: 1.5;
}

.product-count {
    display: inline-block;
    background: #3498db;
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* 关于我们 */
.about {
    padding: 120px 0 80px 0;
    background: #f8f9fa;
    min-height: calc(100vh - 200px);
}

.about-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: 30px;
    color: #2c3e50;
}

.about-text p {
    font-size: 1.1rem;
    color: #7f8c8d;
    margin-bottom: 50px;
    line-height: 1.8;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 280px);
    gap: 30px;
    margin-top: 50px;
    justify-content: center;
}

.feature-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    height: 170px;
    width: 280px;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    background: #f6f8ff;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid #e9ecef;
}

.feature-icon i {
    font-size: 2rem;
    color: #667eea;
}

.feature-content {
    padding: 15px 25px;
    text-align: center;
}

.feature-content h4 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: #2c3e50;
}

.feature-content p {
    color: #7f8c8d;
    margin-bottom: 10px;
    line-height: 1.4;
    font-size: 0.9rem;
}

/* 联系我们 */
.contact {
    padding: 120px 0 80px 0;
    background: white;
    min-height: calc(100vh - 200px);
}

.contact h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #2c3e50;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    max-width: 1200px;
    margin: 0 auto;
    align-items: start;
}

/* 产品展示区域 */
.products-showcase {
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    height: 100%;
    align-content: space-between;
}

.showcase-item {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.showcase-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.showcase-image {
    width: 100%;
    height: 140px;
    overflow: hidden;
}

.showcase-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.showcase-item:hover .showcase-image img {
    transform: scale(1.05);
}

.showcase-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
    padding: 15px;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.showcase-item:hover .showcase-overlay {
    transform: translateY(0);
}

.showcase-overlay h4 {
    font-size: 1rem;
    margin-bottom: 6px;
    color: white;
}

.showcase-overlay p {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.3;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 20px;
    height: 100%;
    justify-content: space-between;
}



.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 15px;
    transition: transform 0.3s ease;
    flex: 1;
}

.contact-item:hover {
    transform: translateX(10px);
}

.contact-item i {
    font-size: 1.5rem;
    color: #3498db;
    width: 40px;
    text-align: center;
}

.contact-item h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: #2c3e50;
}

.contact-item p {
    color: #7f8c8d;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    position: relative;
}

.error-message {
    color: #e74c3c;
    font-size: 0.875rem;
    margin-top: 5px;
    display: block;
    min-height: 20px;
}

.form-group input.error,
.form-group textarea.error {
    border-color: #e74c3c;
}

.form-group input.success,
.form-group textarea.success {
    border-color: #27ae60;
}

.submit-btn:disabled {
    background: #bdc3c7;
    cursor: not-allowed;
    transform: none;
}

.submit-btn:disabled:hover {
    background: #bdc3c7;
    transform: none;
}

.btn-loading {
    display: flex;
    align-items: center;
    gap: 8px;
}

.contact-form input,
.contact-form textarea {
    padding: 15px;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    width: 100%;
    box-sizing: border-box;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #3498db;
}

.submit-btn {
    background: #3498db;
    color: white;
    padding: 15px 30px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    box-sizing: border-box;
}

.submit-btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
}

/* 返回首页按钮 */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-size: 14px;
    transition: all 0.3s ease;
    margin-bottom: 30px;
}

.back-btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(52, 152, 219, 0.3);
}

/* 页脚 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 30px 0 20px;
    margin-top: 0;
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
    color: #3498db;
}

.footer-section p {
    color: #bdc3c7;
    line-height: 1.6;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #3498db;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: #34495e;
    color: white;
    text-align: center;
    line-height: 40px;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #3498db;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
}

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

/* 响应式设计 */

/* 平板设备 */
@media (max-width: 1024px) {
    .container {
        max-width: 100%;
        padding: 0 30px;
    }
    
    .hero-slide-content h1 {
        font-size: 2.8rem;
    }
    
    .showcase-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .showcase-image {
        height: 150px;
    }
}

/* 手机设备 */
@media (max-width: 768px) {
    .hero {
        height: 60vh;
    }
    
    .nav-container {
        height: 80px;
        padding: 0 15px;
    }
    
    .nav-logo img {
        width: 35px;
        height: 35px;
    }
    
    .company-names h2 {
        font-size: 20px;
    }
    
    .company-english {
        font-size: 12px;
    }
    
    .nav-right {
        gap: 10px;
    }
    
    .company-names {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-content p {
        font-size: 1rem;
    }
    
    .hero-slide-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-nav {
        padding: 0 20px;
        top: 55%;
    }
    
    .hero-prev, .hero-next {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }

    .carousel-slide {
        height: 300px;
    }

    .slide-content {
        padding: 20px;
    }

    .slide-content h3 {
        font-size: 1.4rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .showcase-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .showcase-image {
        height: 140px;
    }

    .product-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-slide-content h1 {
        font-size: 2rem;
    }
    
    .hero-nav {
        padding: 0 15px;
        top: 55%;
    }
    
    .hero-prev, .hero-next {
        width: 45px;
        height: 45px;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .hero {
        margin-top: 70px;
        height: 50vh;
    }
    
    .container {
        padding: 0 15px;
    }

    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .hero-slide-content h1 {
        font-size: 1.8rem;
    }
    
    .hero-nav {
        padding: 0 10px;
        top: 50%;
    }
    
    .hero-prev, .hero-next {
        width: 40px;
        height: 40px;
        font-size: 0.9rem;
    }

    .carousel-slide {
        height: 200px;
    }

    .slide-content {
        padding: 10px;
    }

    .slide-content h3 {
        font-size: 1.1rem;
    }
    
    .showcase-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .showcase-image {
        height: 100px;
    }
    
    .contact-content {
        gap: 20px;
    }
    
    .contact-item {
        padding: 12px;
    }
    
    .contact-item i {
        font-size: 1.2rem;
        width: 30px;
    }
    
    .contact-item h4 {
        font-size: 1rem;
    }
    
    .contact-item p {
        font-size: 0.9rem;
    }
    
    .nav-container {
        height: 70px;
        padding: 0 10px;
    }
    
    .nav-logo img {
        width: 30px;
        height: 30px;
    }
    
    .company-names h2 {
        font-size: 16px;
    }
    
    .company-english {
        font-size: 10px;
    }
    
    .nav-menu {
        top: 60px;
    }
    
    .lang-btn {
        height: 30px;
        min-width: 50px;
        font-size: 12px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 20px;
        text-align: center;
    }
    
    .footer-section h3 {
        font-size: 1.2rem;
    }
    
    .footer-section h4 {
        font-size: 1rem;
    }
    
    .footer-section p,
    .footer-section li {
        font-size: 0.9rem;
    }
}