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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #ffffff;
    --bg-light: #f9fafb;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

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

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

/* 导航栏样式 */
nav {
    background-color: #ffffff;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand a {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    transition: opacity 0.3s;
}

.nav-brand a:hover {
    opacity: 0.8;
}

.nav-logo {
    height: 50px;
    width: auto;
    object-fit: contain;
}

.nav-brand-text {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
    transition: color 0.3s;
}

.nav-brand a:hover .nav-brand-text {
    color: var(--secondary-color);
}

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

.nav-menu a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
    padding: 5px 0;
}

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

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 3px 0;
    transition: 0.3s;
}

/* 轮播图样式 */
.hero-section {
    position: relative;
    margin-top: 0;
}

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

.carousel-slide {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

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

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

.carousel-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 2;
    background: rgba(0, 0, 0, 0.5);
    padding: 40px;
    border-radius: 10px;
    max-width: 800px;
}

.carousel-content h2 {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.carousel-content p {
    font-size: 20px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.3);
    border: none;
    color: white;
    font-size: 30px;
    padding: 15px 20px;
    cursor: pointer;
    z-index: 3;
    transition: background 0.3s;
    border-radius: 5px;
}

.carousel-btn:hover {
    background: rgba(255, 255, 255, 0.5);
}

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

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

.carousel-indicators {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 3;
}

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

.indicator.active {
    background: white;
}

/* 按钮样式 */
.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* 页面标题 */
.page-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 80px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 48px;
    margin-bottom: 10px;
}

.page-header p {
    font-size: 20px;
    opacity: 0.9;
}

/* 内容区域 */
.content-section {
    padding: 80px 0;
}

.section-title {
    font-size: 36px;
    text-align: center;
    margin-bottom: 50px;
    color: var(--text-color);
    position: relative;
    padding-bottom: 20px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

/* 公司简介 */
.intro-section {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.intro-text h3 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.intro-text p {
    margin-bottom: 20px;
    color: var(--text-light);
    line-height: 1.8;
}

.intro-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
}

/* 关于我们页面样式 */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text h2 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.about-text p {
    margin-bottom: 20px;
    color: var(--text-light);
    line-height: 1.8;
}

.about-images {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.about-image {
    overflow: hidden;
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s;
}

.about-image:hover {
    transform: translateY(-5px);
}

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

/* 服务卡片 */
.services-section {
    padding: 80px 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 50px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .services-grid {
        grid-template-columns: 1fr;
    }
}

.service-card-image {
    text-decoration: none;
    display: block;
    transition: transform 0.3s;
}

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

.service-image-container {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: var(--shadow);
    height: 250px;
}

.service-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.service-card-image:hover .service-image-container img {
    transform: scale(1.05);
}

.service-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(41, 128, 185, 0.9), rgba(52, 152, 219, 0.7));
    color: white;
    padding: 20px;
    text-align: center;
}

.service-overlay h3 {
    font-size: 20px;
    margin-bottom: 5px;
    color: white;
}

.service-overlay p {
    font-size: 14px;
    margin: 0;
    color: rgba(255, 255, 255, 0.9);
}

/* 旧的服务卡片样式（保留以兼容其他页面） */
.service-card {
    background: white;
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    font-size: 60px;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--text-color);
}

.service-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* 优势特点 */
.advantages-section {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.advantage-item {
    background: white;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
}

.advantage-item h3 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

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

/* 产品卡片 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 768px) {
    .products-grid {
        grid-template-columns: 1fr;
    }
}

.product-card {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    width: 100%;
    height: 200px;
    margin-bottom: 20px;
    overflow: hidden;
    border-radius: 8px;
    background-color: #f9fafb;
}

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

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

.product-icon {
    font-size: 50px;
    margin-bottom: 20px;
}

.product-card h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.product-specs h4 {
    font-size: 16px;
    margin: 15px 0 10px;
    color: var(--text-color);
}

.product-card ul {
    list-style: none;
    margin-bottom: 25px;
}

.product-card ul li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
    color: var(--text-light);
}

.product-card ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* 时间线 */
.timeline-section {
    padding: 80px 0;
    background-color: var(--bg-light);
}

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

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

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

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-year {
    width: 100px;
    height: 100px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    position: relative;
    z-index: 2;
    flex-shrink: 0;
}

.timeline-content {
    flex: 1;
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin: 0 30px;
}

.timeline-content h3 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.timeline-content p {
    color: var(--text-light);
}

/* 企业文化 */
.culture-section {
    padding: 80px 0;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.culture-item {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    padding: 40px;
    border-radius: 10px;
    text-align: center;
}

.culture-item h3 {
    font-size: 28px;
    margin-bottom: 20px;
}

.culture-item p {
    font-size: 18px;
    opacity: 0.95;
}

/* 服务流程 */
.process-section {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.process-step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 80px;
    height: 80px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: bold;
    margin: 0 auto 20px;
}

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

.process-step p {
    color: var(--text-light);
}

/* 留言板样式 */
.message-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.message-form-wrapper,
.message-list-wrapper {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.message-form-wrapper h2,
.message-list-wrapper h2 {
    font-size: 28px;
    margin-bottom: 30px;
    color: var(--primary-color);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.required {
    color: red;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s;
}

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

.form-group textarea {
    resize: vertical;
}

.btn-submit {
    margin-right: 10px;
}

.message-list {
    max-height: 600px;
    overflow-y: auto;
}

.message-item {
    background: var(--bg-light);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid var(--primary-color);
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.message-author strong {
    color: var(--primary-color);
    font-size: 18px;
}

.message-email {
    color: var(--text-light);
    font-size: 14px;
    margin-left: 10px;
}

.message-date {
    color: var(--text-light);
    font-size: 14px;
}

.message-subject {
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-color);
}

.message-content {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 10px;
}

.message-contact {
    font-size: 14px;
    color: var(--text-light);
}

.no-messages {
    text-align: center;
    color: var(--text-light);
    padding: 40px;
}

/* 联系页面样式 */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info,
.contact-form-wrapper {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.contact-info h2,
.contact-form-wrapper h2 {
    font-size: 28px;
    margin-bottom: 30px;
    color: var(--primary-color);
}

.contact-item {
    display: flex;
    margin-bottom: 30px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 32px;
    margin-right: 20px;
    flex-shrink: 0;
}

.contact-details h3 {
    font-size: 20px;
    margin-bottom: 8px;
    color: var(--text-color);
}

.contact-details p {
    color: var(--text-light);
    margin-bottom: 5px;
}

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

.map-placeholder {
    background: white;
    padding: 100px;
    text-align: center;
    border-radius: 10px;
    box-shadow: var(--shadow);
    color: var(--text-light);
}

/* 页脚样式 */
.footer {
    background-color: #1f2937;
    color: white;
    padding: 60px 0 20px;
    margin-top: 80px;
}

.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: white;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

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

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

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* 社交媒体二维码样式 */
.social-qr-codes {
    display: flex;
    gap: 20px;
    margin-top: 15px;
}

.qr-code-item {
    text-align: center;
}

.qr-code {
    width: 120px;
    height: 120px;
    border-radius: 8px;
    margin-bottom: 10px;
}

.qr-code-item p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
}

/* 响应式设计调整 */
@media (max-width: 768px) {
    .social-qr-codes {
        justify-content: center;
    }
    
    .qr-code {
        width: 100px;
        height: 100px;
    }
}

/* 通知样式 */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #10b981;
    color: white;
    padding: 15px 25px;
    border-radius: 5px;
    box-shadow: var(--shadow-lg);
    z-index: 10000;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s;
}

.notification.show {
    opacity: 1;
    transform: translateX(0);
}

.notification.success {
    background: #10b981;
}

.notification.error {
    background: #ef4444;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-logo {
        height: 40px;
    }
    
    .nav-brand-text {
        font-size: 18px;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 20px 0;
        gap: 0;
    }

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

    .nav-menu li {
        padding: 15px 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .carousel-container {
        height: 400px;
    }

    .carousel-content {
        padding: 20px;
    }

    .carousel-content h2 {
        font-size: 28px;
    }

    .carousel-content p {
        font-size: 16px;
    }

    .intro-content {
        grid-template-columns: 1fr;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-images {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .message-container,
    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .timeline::before {
        left: 50px;
    }

    .timeline-item {
        flex-direction: row !important;
        padding-left: 80px;
    }

    .timeline-year {
        position: absolute;
        left: 0;
    }

    .timeline-content {
        margin: 0;
    }

    .page-header h1 {
        font-size: 32px;
    }

    .section-title {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .carousel-container {
        height: 300px;
    }

    .carousel-content h2 {
        font-size: 20px;
    }

    .carousel-content p {
        font-size: 14px;
    }

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