/* 全局样式 */
:root {
    --primary-color: #1a237e;
    --secondary-color: #ff9800;
    --accent-color: #ffeb3b;
    --text-color: #333;
    --bg-color: #fff;
    --light-gray: #f5f5f5;
    --dark-gray: #616161;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 25px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn:hover {
    background-color: #303f9f;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

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

/* 区块标题样式 */
.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-header h2 {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-weight: 700;
}

.divider {
    height: 4px;
    width: 60px;
    background-color: var(--secondary-color);
    margin: 0 auto;
}

/* 占位符样式，用于后期替换为实际图片 */
.image-placeholder {
    background-color: var(--light-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 250px;
    color: var(--dark-gray);
    border-radius: 6px;
    transition: var(--transition);
}

.image-placeholder i {
    font-size: 60px;
}

/* 导航栏样式 */
header {
    background-color: var(--bg-color);
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 24px;
    font-weight: 700;
}

nav ul {
    display: flex;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    font-weight: 500;
    color: var(--text-color);
    position: relative;
    padding-bottom: 5px;
}

nav ul li a:hover, nav ul li a.active {
    color: var(--primary-color);
}

nav ul li a:after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    bottom: 0;
    left: 0;
    transition: var(--transition);
}

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

.mobile-menu {
    display: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--primary-color);
}

/* 轮播图样式 */
.hero-slider {
    position: relative;
    height: 600px;
    overflow: hidden;
}

.slider-container {
    position: relative;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.slide.active {
    opacity: 1;
}

.slide-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #fff;
    width: 80%;
    max-width: 800px;
    z-index: 2;
}

.slide-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.slide-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.slider-controls {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 3;
}

.slider-dots {
    display: flex;
    gap: 0.5rem;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: background 0.3s ease;
}

.dot.active {
    background: #fff;
}

.prev-btn,
.next-btn {
    background: transparent;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

.prev-btn:hover,
.next-btn:hover {
    color: #f0f0f0;
}

@media (max-width: 768px) {
    .hero-slider {
        height: 400px;
    }

    .slide-content h2 {
        font-size: 2rem;
    }

    .slide-content p {
        font-size: 1rem;
    }
}

/* 公司简介样式 */
.about-preview {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.about-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.about-text {
    flex: 1;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 16px;
    line-height: 1.8;
}

.about-image {
    flex: 1;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* 服务特点样式 */
.features {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-item {
    background-color: var(--bg-color);
    padding: 40px 20px;
    text-align: center;
    border-radius: 6px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateY(-10px);
}

.feature-icon {
    margin-bottom: 20px;
    font-size: 36px;
    color: var(--secondary-color);
}

.feature-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.feature-item p {
    font-size: 14px;
    color: var(--dark-gray);
}

/* 产品展示样式 */
.products-preview {
    padding: 80px 0;
}

.product-categories {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.category-item {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.category-item:hover {
    transform: translateY(-5px);
}

.category-image {
    height: 250px;
    overflow: hidden;
}

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

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

.category-item h3 {
    padding: 20px;
    font-size: 20px;
    color: var(--primary-color);
}

.category-item p {
    padding: 0 20px 20px;
    color: var(--dark-gray);
}

@media (max-width: 768px) {
    .about-content {
        flex-direction: column;
    }

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

    .category-image {
        height: 200px;
    }
}

/* 客户评价样式 */
.testimonials {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.testimonial-slider {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    height: 250px;
}

.testimonial-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.6s ease;
    pointer-events: none;
}

.testimonial-item.active {
    opacity: 1;
    pointer-events: auto;
}

.testimonial-content {
    background-color: var(--bg-color);
    padding: 30px;
    border-radius: 6px;
    box-shadow: var(--shadow);
    text-align: center;
}

.testimonial-content p {
    font-size: 18px;
    font-style: italic;
    margin-bottom: 20px;
    line-height: 1.8;
}

.client-info h4 {
    font-size: 16px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.rating {
    color: #ffc107;
    font-size: 16px;
}

.testimonial-controls {
    margin-top: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.prev-testimonial, .next-testimonial {
    background: rgba(255, 255, 255, 0.6);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin: 0 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--primary-color);
    transition: var(--transition);
}

.prev-testimonial:hover, .next-testimonial:hover {
    background: var(--bg-color);
}

.testimonial-dots {
    display: flex;
}

/* 联系我们样式 */
.contact-preview {
    padding: 80px 0;
    background-color: var(--bg-color);
}

.contact-content {
    display: flex;
    gap: 50px;
}

.contact-info {
    flex: 1;
}

.info-item {
    display: flex;
    margin-bottom: 30px;
}

.info-icon {
    margin-right: 20px;
    color: var(--primary-color);
    font-size: 36px;
}

.info-text h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.info-text p {
    color: var(--dark-gray);
}

.contact-form-preview {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 页脚样式 */
footer {
    background-color: var(--primary-color);
    color: white;
    padding-top: 60px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.footer-logo h2 {
    font-size: 24px;
    margin-bottom: 20px;
}

.footer-logo p {
    font-size: 14px;
    opacity: 0.8;
}

.footer-links h3, .footer-contact h3 {
    font-size: 18px;
    margin-bottom: 20px;
}

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

.footer-links ul li a {
    opacity: 0.8;
    transition: var(--transition);
}

.footer-links ul li a:hover {
    opacity: 1;
    padding-left: 5px;
}

.footer-contact p {
    margin-bottom: 15px;
    font-size: 14px;
    opacity: 0.8;
    display: flex;
    align-items: center;
}

.footer-contact p i {
    margin-right: 10px;
    font-size: 16px;
}

.footer-bottom {
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 14px;
    opacity: 0.7;
}

/* 响应式设计 */
@media screen and (max-width: 1024px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (max-width: 768px) {
    header .container {
        padding: 15px;
    }
    
    .logo h1 {
        font-size: 20px;
    }
    
    nav {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 80%;
        height: calc(100vh - 80px);
        background-color: var(--bg-color);
        box-shadow: var(--shadow);
        transition: var(--transition);
    }
    
    nav.active {
        left: 0;
    }
    
    nav ul {
        flex-direction: column;
        padding: 20px;
    }
    
    nav ul li {
        margin: 15px 0;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .slide-content h2 {
        font-size: 36px;
    }
    
    .slide-content p {
        font-size: 16px;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .product-categories {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        flex-direction: column;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 480px) {
    .section-header h2 {
        font-size: 28px;
    }
    
    .slide-content h2 {
        font-size: 28px;
    }
    
    .btn {
        padding: 10px 20px;
    }
    
    .feature-item, .category-item {
        padding: 20px 15px;
    }
}

/* 页面头部样式 */
.page-header {
    background-color: var(--primary-color);
    color: white;
    padding: 120px 0 50px;
    text-align: center;
}

.page-header h1 {
    font-size: 48px;
    margin-bottom: 15px;
}

.breadcrumb {
    font-size: 16px;
}

.breadcrumb a {
    color: var(--accent-color);
}

.breadcrumb span {
    opacity: 0.8;
}

/* 关于我们页面样式 */
.about-us {
    padding: 80px 0;
}

.mission-vision {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.mv-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.mission, .vision, .values {
    background-color: var(--bg-color);
    padding: 40px 30px;
    text-align: center;
    border-radius: 6px;
    box-shadow: var(--shadow);
}

.mv-icon {
    font-size: 48px;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.mission h2, .vision h2, .values h2 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.our-advantages {
    padding: 80px 0;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.advantage-item {
    background-color: var(--light-gray);
    padding: 30px;
    border-radius: 6px;
    transition: var(--transition);
}

.advantage-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow);
}

.advantage-icon {
    font-size: 36px;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.advantage-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.our-team {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.team-member {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.team-member:hover {
    transform: translateY(-5px);
}

.member-photo {
    height: 300px;
    overflow: hidden;
}

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

.team-member:hover .member-photo img {
    transform: scale(1.05);
}

.member-info {
    padding: 20px;
    text-align: center;
}

.member-info h3 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.member-position {
    color: var(--dark-gray);
    font-size: 16px;
    margin-bottom: 10px;
}

.member-desc {
    color: var(--text-color);
    font-size: 14px;
    line-height: 1.6;
}

.our-history {
    padding: 80px 0;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 0;
}

.timeline:before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 4px;
    background-color: var(--primary-color);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
}

.timeline-dot {
    position: absolute;
    top: 15px;
    left: 50%;
    width: 20px;
    height: 20px;
    background-color: var(--secondary-color);
    border-radius: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.timeline-content {
    position: relative;
    width: 45%;
    padding: 20px;
    background-color: var(--bg-color);
    border-radius: 6px;
    box-shadow: var(--shadow);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-left: auto;
}

.timeline-content h3 {
    font-size: 20px;
    margin-bottom: 5px;
    color: var(--primary-color);
}

.timeline-date {
    color: var(--secondary-color);
    font-weight: 500;
    margin-bottom: 10px;
}

.our-partners {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.partner-item {
    background-color: var(--bg-color);
    border-radius: 6px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.partner-item .image-placeholder {
    min-height: 120px;
}

.partner-item .image-placeholder i {
    font-size: 40px;
    color: var(--primary-color);
}

/* 产品服务页面样式 */
.services-intro {
    padding: 80px 0;
}

.services-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.services-text {
    flex: 1;
}

.services-text h2 {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.services-text p {
    margin-bottom: 20px;
    line-height: 1.8;
}

.services-image {
    flex: 1;
}

.service-process {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.process-steps {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.process-steps:before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 30px;
    width: 4px;
    background-color: var(--primary-color);
}

.process-step {
    position: relative;
    margin-bottom: 30px;
    padding-left: 80px;
}

.step-number {
    position: absolute;
    left: 10px;
    top: 0;
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    z-index: 2;
}

.step-content {
    background-color: var(--bg-color);
    padding: 20px;
    border-radius: 6px;
    box-shadow: var(--shadow);
}

.step-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.product-categories-section {
    padding: 80px 0;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.category-card {
    background-color: var(--bg-color);
    border-radius: 6px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    border: 1px solid var(--border-color);
}

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

.category-icon {
    font-size: 40px;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.category-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.category-items {
    margin-bottom: 20px;
    text-align: left;
}

.category-items li {
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.category-items li:before {
    content: '•';
    color: var(--secondary-color);
    position: absolute;
    left: 0;
}

.btn.small {
    padding: 8px 15px;
    font-size: 14px;
}

.custom-services {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.custom-services-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.service-card {
    background-color: var(--bg-color);
    padding: 30px;
    border-radius: 6px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

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

.service-icon {
    font-size: 40px;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.case-studies {
    padding: 80px 0;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.case-item {
    background-color: var(--bg-color);
    border-radius: 6px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.case-item:hover {
    transform: translateY(-10px);
}

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

.case-info {
    padding: 20px;
}

.case-info h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.consultation {
    padding: 60px 0;
    background-color: var(--primary-color);
    color: white;
    text-align: center;
}

.consultation-content h2 {
    font-size: 32px;
    margin-bottom: 15px;
}

.consultation-content p {
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.consultation .btn {
    background-color: var(--secondary-color);
    color: var(--primary-color);
    font-weight: 700;
}

.consultation .btn:hover {
    background-color: var(--accent-color);
}

/* 联系我们页面样式 */
.contact-info-section {
    padding: 80px 0;
}

.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.contact-info-item {
    background-color: var(--light-gray);
    padding: 30px;
    border-radius: 6px;
    text-align: center;
    transition: var(--transition);
}

.contact-info-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow);
    background-color: var(--bg-color);
}

.contact-icon {
    font-size: 40px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.contact-info-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.map-form {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.map-form-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 50px;
    align-items: start;
}

.map-container {
    height: 100%;
}

.map-placeholder {
    background-color: var(--bg-color);
    padding: 30px;
    border-radius: 6px;
    text-align: center;
    height: 100%;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.map-placeholder i {
    font-size: 60px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.map-note {
    margin-top: 20px;
    font-size: 14px;
    color: var(--dark-gray);
}

.contact-form {
    background-color: var(--bg-color);
    padding: 40px;
    border-radius: 6px;
    box-shadow: var(--shadow);
}

.contact-form h2 {
    font-size: 28px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.contact-form p {
    margin-bottom: 30px;
    color: var(--dark-gray);
}

form {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group.full-width {
    grid-column: span 2;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.required {
    color: #e74c3c;
}

input, textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 16px;
    transition: var(--transition);
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(26, 35, 126, 0.2);
}

.faq {
    padding: 80px 0;
}

.faq-content {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    background-color: var(--bg-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    background-color: var(--light-gray);
}

.faq-question h3 {
    font-size: 18px;
    margin: 0;
    color: var(--primary-color);
}

.faq-toggle {
    font-size: 16px;
    color: var(--dark-gray);
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background-color: var(--light-gray);
}

.faq-answer p {
    padding: 20px 0;
    margin: 0;
}

.join-us {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.join-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.join-text {
    flex: 1;
}

.join-text h2 {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.join-text p {
    margin-bottom: 20px;
    line-height: 1.8;
}

.join-text a {
    color: var(--primary-color);
    font-weight: 500;
    text-decoration: underline;
}

.join-image {
    flex: 1;
}

/* 响应式样式 */
@media screen and (max-width: 1024px) {
    .mv-content, .advantages-grid, .team-grid, .partners-grid, .categories-grid, .custom-services-content, .contact-info-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .case-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline-content {
        width: 70%;
    }
    
    .timeline:before {
        left: 30px;
    }
    
    .timeline-dot {
        left: 30px;
    }
    
    .timeline-item:nth-child(odd) .timeline-content {
        margin-left: 60px;
    }
    
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 60px;
    }
}

@media screen and (max-width: 768px) {
    .page-header h1 {
        font-size: 36px;
    }
    
    .services-content, .join-content, .map-form-container {
        flex-direction: column;
        grid-template-columns: 1fr;
    }
    
    .about-content {
        flex-direction: column-reverse;
    }
    
    form {
        grid-template-columns: 1fr;
    }
    
    .form-group.full-width {
        grid-column: span 1;
    }
    
    .partner-item .image-placeholder {
        min-height: 100px;
    }
    
    .member-photo {
        height: 250px;
    }
}

@media screen and (max-width: 480px) {
    .mv-content, .advantages-grid, .team-grid, .partners-grid, .categories-grid, .custom-services-content, .contact-info-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-info-item, .category-card, .service-card {
        padding: 20px 15px;
    }
    
    .page-header {
        padding: 100px 0 30px;
    }
}

/* 语言切换下拉框样式 */
.language-switcher {
    margin-left: 20px;
}

.lang-select {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: #fff;
    color: #333;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 16px;
    padding-right: 30px;
}

.lang-select:hover {
    border-color: #999;
}

.lang-select:focus {
    outline: none;
    border-color: #1a237e;
    box-shadow: 0 0 0 2px rgba(26, 35, 126, 0.2);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .language-switcher {
        margin-left: 10px;
    }
    
    .lang-select {
        padding: 6px 10px;
        font-size: 12px;
    }
}