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

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f5576c;
    --text-dark: #333;
    --text-light: #666;
    --text-gray: #999;
    --bg-light: #f8f9fa;
    --white: #fff;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 5px 20px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

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

ul {
    list-style: none;
}

/* 头部样式 */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo h1 {
    font-size: 32px;
    color: var(--primary-color);
    font-weight: 700;
}

.logo h1 span {
    color: var(--primary-color);
}

.nav ul {
    display: flex;
    gap: 30px;
}

.nav a {
    color: var(--text-dark);
    font-weight: 500;
    padding: 10px 0;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
}

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

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

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

/* Banner 样式 */
.banner {
    position: relative;
    height: 600px;
    overflow: hidden;
}

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

.banner-slide {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.banner-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

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

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(102, 126, 234, 0.3);
    z-index: 5;
}

.banner-slide:nth-child(1) .banner-overlay {
    background: rgba(102, 126, 234, 0.3);
}

.banner-slide:nth-child(2) .banner-overlay {
    background: rgba(240, 147, 251, 0.3);
}

.banner-slide:nth-child(3) .banner-overlay {
    background: rgba(79, 172, 254, 0.3);
}

.banner-content {
    text-align: center;
    color: var(--white);
    max-width: 800px;
    position: relative;
    z-index: 10;
}

.banner-content h2 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.banner-content p {
    font-size: 20px;
    margin-bottom: 30px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.banner-dots {
    position: absolute;
    bottom: 30px;
    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: all 0.3s ease;
}

.dot.active {
    background: var(--white);
    width: 15px;
}

.banner-arrows {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 40px;
    transform: translateY(-50%);
    z-index: 10;
}

.arrow-prev,
.arrow-next {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.arrow-prev:hover,
.arrow-next:hover {
    background: rgba(255, 255, 255, 0.5);
    transform: scale(1.1);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

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

.btn-outline {
    background: transparent;
    border: 2px solid var(--white);
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.btn-small {
    padding: 8px 20px;
    font-size: 14px;
    border-radius: 20px;
}

.btn-large {
    padding: 15px 40px;
    font-size: 16px;
    border-radius: 30px;
}

/* 章节标题 */
.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 36px;
    color: var(--text-dark);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.section-title p {
    font-size: 18px;
    color: var(--text-light);
    margin-top: 20px;
}

/* 优势部分 */
.advantages {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.advantage-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

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

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: var(--white);
}

.advantage-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

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

/* 产品预览 */
.products-preview {
    padding: 80px 0;
}

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

.product-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
}

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

.product-image {
    width: 120px;
    height: 120px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--white);
    overflow: hidden;
}

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

.product-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.product-card p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.product-card .link {
    color: var(--primary-color);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.product-card .link:hover {
    gap: 10px;
}

.center-btn {
    text-align: center;
    margin-top: 40px;
}

/* 解决方案预览 */
.solutions-preview {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.solution-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

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

.solution-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    color: var(--white);
}

.solution-content {
    padding: 25px;
}

.solution-content h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

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

.solution-content .link {
    color: var(--primary-color);
    font-weight: 500;
}

/* 案例预览 */
.cases-preview {
    padding: 80px 0;
}

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

.case-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

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

.case-image {
    height: 200px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    color: var(--white);
}

.case-content {
    padding: 25px;
}

.case-content h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.case-content p {
    color: var(--text-light);
    margin-bottom: 15px;
    line-height: 1.6;
}

.case-tag {
    display: inline-block;
    padding: 5px 15px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-radius: 20px;
    font-size: 12px;
}

/* CTA 部分 */
.cta {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
}

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

.cta-content h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.cta-content p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

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

.cta .btn-outline {
    border-color: var(--white);
    color: var(--white);
}

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

/* 页脚 */
.footer {
    background: #2c3e50;
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer h3 {
    font-size: 18px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--primary-color);
}

.footer p {
    line-height: 1.8;
    opacity: 0.8;
    margin-bottom: 20px;
}

.footer-contact-info {
    margin: 20px 0;
    padding: 15px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
}

.footer-contact-info p {
    margin: 8px 0;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}

.footer-contact-info p i {
    color: var(--primary-color);
    width: 16px;
}

.footer-contact ul li {
    margin-bottom: 12px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.footer-contact ul li i {
    color: var(--primary-color);
    margin-top: 3px;
}

.footer-phone-large {
    font-size: 24px !important;
    font-weight: 700;
    color: var(--primary-color);
    margin: 15px 0 !important;
}

.footer-phone-large i {
    font-size: 24px !important;
    width: 30px !important;
}

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

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.footer-social a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

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

.footer ul li a {
    opacity: 0.8;
    transition: all 0.3s ease;
}

.footer ul li a:hover {
    opacity: 1;
    padding-left: 5px;
    color: var(--primary-color);
}

.footer-contact ul li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 15px;
    opacity: 0.8;
}

.footer-contact ul li i {
    color: var(--primary-color);
    margin-top: 3px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
    opacity: 0.7;
}

.footer-bottom p {
    margin-bottom: 5px;
}

/* 返回顶部 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 20px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
}

/* 页面 Banner */
.page-banner {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 100px 0 60px;
    text-align: center;
    color: var(--white);
}

.page-banner h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

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

/* 产品页面 */
.products-page {
    padding: 60px 0;
}

.products-filter {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 50px;
}

.filter-btn {
    padding: 10px 25px;
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-color: transparent;
}

.product-specs {
    margin: 20px 0;
    text-align: left;
}

.product-specs ul {
    list-style: none;
}

.product-specs li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--text-light);
}

.product-specs li span:first-child {
    font-weight: 500;
    color: var(--text-dark);
}

.product-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.download-section {
    margin-top: 80px;
}

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

.download-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 25px;
    background: var(--bg-light);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.download-item:hover {
    box-shadow: var(--shadow);
}

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

.download-item h4 {
    font-size: 18px;
    margin-bottom: 5px;
    color: var(--text-dark);
}

.download-item p {
    color: var(--text-light);
    font-size: 14px;
}

/* 解决方案页面 */
.solutions-page {
    padding: 60px 0;
}

.solutions-intro {
    margin-bottom: 60px;
}

.solution-detail {
    margin-bottom: 60px;
    padding: 40px;
    background: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.solution-header {
    display: flex;
    align-items: center;
    gap: 30px;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 2px solid var(--border-color);
}

.solution-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: var(--white);
    flex-shrink: 0;
}

.solution-header h2 {
    font-size: 32px;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.solution-subtitle {
    font-size: 18px;
    color: var(--text-light);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-bottom: 30px;
}

.solution-text h3 {
    font-size: 22px;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.solution-text ul {
    list-style: none;
}

.solution-text ul li {
    padding: 10px 0 10px 30px;
    position: relative;
    color: var(--text-light);
    line-height: 1.8;
}

.solution-text ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.solution-features {
    margin: 40px 0;
}

.solution-features h3 {
    font-size: 22px;
    color: var(--text-dark);
    margin-bottom: 25px;
    text-align: center;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.feature-item {
    text-align: center;
    padding: 25px;
    background: var(--bg-light);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.feature-item:hover {
    box-shadow: var(--shadow);
    transform: translateY(-5px);
}

.feature-item i {
    font-size: 40px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.feature-item h4 {
    font-size: 18px;
    color: var(--text-dark);
    margin-bottom: 10px;
}

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

.solution-products {
    margin-top: 40px;
}

.solution-products h3 {
    font-size: 22px;
    color: var(--text-dark);
    margin-bottom: 25px;
    text-align: center;
}

.products-list {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.product-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px 25px;
    background: var(--bg-light);
    border-radius: 25px;
}

.product-item i {
    color: var(--primary-color);
}

.solution-cta {
    text-align: center;
    padding: 60px 40px;
    background: linear-gradient(135deg, var(--bg-light), #e8eaf6);
    border-radius: 10px;
    margin-top: 60px;
}

.solution-cta h2 {
    font-size: 32px;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.solution-cta p {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 30px;
}

.solution-cta .cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* 案例页面 */
.cases-page {
    padding: 60px 0;
}

.cases-filter {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 50px;
}

.case-card-large {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    margin-bottom: 40px;
    transition: all 0.3s ease;
}

.case-card-large:hover {
    box-shadow: var(--shadow-lg);
}

.case-card-large .case-image {
    height: 300px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    color: var(--white);
}

.case-content {
    padding: 30px;
}

.case-tags {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.case-tag {
    padding: 5px 15px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-radius: 20px;
    font-size: 12px;
}

.case-content h3 {
    font-size: 24px;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.case-info {
    display: flex;
    gap: 30px;
    margin-bottom: 25px;
    padding: 15px;
    background: var(--bg-light);
    border-radius: 5px;
}

.case-item {
    display: flex;
    gap: 10px;
}

.case-item .label {
    font-weight: 500;
    color: var(--text-dark);
}

.case-detail {
    display: none;
}

.case-detail h4 {
    font-size: 18px;
    color: var(--text-dark);
    margin: 20px 0 15px;
}

.case-detail ul {
    list-style: none;
    margin-bottom: 15px;
}

.case-detail ul li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
    color: var(--text-light);
    line-height: 1.8;
}

.case-detail ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 20px;
}

.case-toggle {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 16px;
    cursor: pointer;
    padding: 10px 0;
    display: flex;
    align-items: center;
    gap: 5px;
    margin-top: 20px;
}

.case-toggle i {
    transition: transform 0.3s ease;
}

.case-toggle.active i {
    transform: rotate(180deg);
}

.cases-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    padding: 60px 0;
    margin-top: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    color: var(--white);
    text-align: center;
}

.stat-item {
    padding: 30px;
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 18px;
    opacity: 0.9;
}

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

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text h2 {
    font-size: 32px;
    color: var(--text-dark);
    margin-bottom: 25px;
}

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

.about-highlights {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.highlight-item {
    text-align: center;
    padding: 20px;
    background: linear-gradient(135deg, var(--bg-light), #e8eaf6);
    border-radius: 10px;
}

.highlight-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

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

.about-image .image-placeholder {
    height: 400px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 80px;
}

.about-image .image-placeholder p {
    font-size: 18px;
    margin-top: 20px;
}

.company-values {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.value-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

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

.value-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: var(--white);
}

.value-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

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

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

.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    padding: 20px 0;
    position: relative;
    width: 50%;
}

.timeline-item:nth-child(odd) {
    align-self: flex-start;
}

.timeline-item:nth-child(even) {
    align-self: flex-end;
    justify-content: flex-start;
    margin-left: 50%;
}

.timeline-year {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 20px;
    font-weight: 700;
    border: 5px solid var(--white);
    box-shadow: var(--shadow);
}

.timeline-content {
    padding: 25px;
    background: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    width: calc(100% - 60px);
}

.timeline-content h3 {
    font-size: 20px;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.timeline-content p {
    color: var(--text-light);
    line-height: 1.6;
}

.company-certifications {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.cert-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

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

.cert-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: var(--white);
}

.cert-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.cert-card p {
    color: var(--text-light);
    font-size: 14px;
}

.company-factory {
    padding: 80px 0;
}

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

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

.factory-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    color: var(--white);
    margin-bottom: 20px;
}

.factory-item h3 {
    font-size: 18px;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.factory-item p {
    color: var(--text-light);
    font-size: 14px;
}

.company-team {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.team-card {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

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

.team-avatar {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--white);
}

.team-card h3 {
    font-size: 20px;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.team-role {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 15px;
}

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

/* 新闻页面 */
.news-page {
    padding: 60px 0;
}

.news-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 50px;
}

.tab-btn {
    padding: 10px 25px;
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.tab-btn:hover,
.tab-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-color: transparent;
}

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

.news-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    display: flex;
    transition: all 0.3s ease;
}

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

.news-image {
    width: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    color: var(--white);
}

.news-content {
    padding: 25px;
    flex: 1;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.news-tag {
    padding: 5px 15px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-radius: 20px;
    font-size: 12px;
}

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

.news-content h3 {
    font-size: 20px;
    color: var(--text-dark);
    margin-bottom: 15px;
    line-height: 1.4;
}

.news-content p {
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.6;
}

.news-content .news-excerpt {
    margin-bottom: 15px;
}

.news-content .news-full {
    margin-top: 20px;
    padding: 20px;
    background: #f8f9fa;
    border-left: 3px solid var(--primary-color);
    border-radius: 5px;
}

.news-content .news-full h4 {
    color: var(--text-dark);
    font-size: 16px;
    margin: 15px 0 10px;
}

.news-content .news-full h4:first-child {
    margin-top: 0;
}

.news-content .news-full p {
    margin-bottom: 8px;
    font-size: 14px;
}

.news-content .read-more {
    color: var(--primary-color);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
}

.news-content .read-more:hover {
    gap: 10px;
}

.news-pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 50px;
}

.page-btn {
    width: 40px;
    height: 40px;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-btn:hover,
.page-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-color: transparent;
}

/* 联系我们页面 */
.contact-page {
    padding: 60px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 50px;
    margin-bottom: 60px;
}

.contact-cards {
    display: grid;
    gap: 20px;
    margin: 30px 0;
}

.contact-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.contact-card:hover {
    box-shadow: var(--shadow);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--white);
    flex-shrink: 0;
}

.contact-card h3 {
    font-size: 18px;
    color: var(--text-dark);
    margin-bottom: 5px;
}

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

.contact-social h3 {
    font-size: 20px;
    color: var(--text-dark);
    margin: 30px 0 20px;
}

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

.social-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 15px 20px;
    background: var(--bg-light);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    transform: translateY(-5px);
}

.social-link i {
    font-size: 24px;
}

.social-link span {
    font-size: 12px;
}

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

.contact-form {
    margin-top: 30px;
}

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

.form-group {
    margin-bottom: 20px;
}

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

.required {
    color: var(--accent-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 15px;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.map-section {
    margin-bottom: 60px;
}

.map-container {
    height: 400px;
    background: var(--bg-light);
    border-radius: 10px;
    overflow: hidden;
}

.map-placeholder {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    font-size: 80px;
}

.map-placeholder h3 {
    font-size: 24px;
    margin-top: 20px;
}

.map-placeholder p {
    font-size: 16px;
    margin-top: 10px;
}

.faq-section {
    margin-bottom: 60px;
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border-radius: 10px;
    margin-bottom: 15px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.faq-question h3 {
    font-size: 18px;
    color: var(--text-dark);
}

.faq-question i {
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding: 0 25px 25px;
    color: var(--text-light);
    line-height: 1.8;
}

.faq-item.active .faq-answer {
    display: block;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .advantages-grid,
    .values-grid,
    .certifications-grid,
    .factory-grid,
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 60px;
    }

    .timeline-item:nth-child(even) {
        margin-left: 0;
    }

    .timeline-year {
        left: 20px;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--white);
        box-shadow: var(--shadow);
        padding: 20px;
    }

    .nav.active {
        display: block;
    }

    .nav ul {
        flex-direction: column;
        gap: 15px;
    }

    .mobile-menu-btn {
        display: block;
    }

    .banner-content h2 {
        font-size: 32px;
    }

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

    .advantages-grid,
    .products-grid,
    .solutions-grid,
    .cases-grid,
    .values-grid,
    .certifications-grid,
    .factory-grid,
    .team-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }

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

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

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

    .form-row {
        grid-template-columns: 1fr;
    }

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

    .news-card {
        flex-direction: column;
    }

    .news-image {
        width: 100%;
        height: 200px;
    }

    .solution-header {
        flex-direction: column;
        text-align: center;
    }

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

    .products-filter,
    .cases-filter,
    .news-tabs {
        flex-wrap: wrap;
    }

    .cta-buttons,
    .solution-cta .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

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

@media (max-width: 480px) {
    .banner-content h2 {
        font-size: 24px;
    }

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

    .section-title h2 {
        font-size: 28px;
    }

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

    .cases-stats {
        grid-template-columns: 1fr;
    }

    .stat-number {
        font-size: 36px;
    }
}