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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

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

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

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
    color: #333;
}

.nav-logo i {
    margin-right: 10px;
    color: #667eea;
    font-size: 28px;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-menu li {
    margin: 0;
}

.nav-link {
    display: block;
    padding: 10px 15px;
    text-decoration: none;
    color: #333;
    font-weight: 500;
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    transform: translateY(-1px);
}

.contact-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white !important;
    margin-left: 10px;
}

.contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

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

.bar {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 首页轮播 */
.hero {
    height: 100vh;
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><circle cx="7" cy="7" r="7"/></g></svg>');
    animation: backgroundMove 20s linear infinite;
}

@keyframes backgroundMove {
    0% { transform: translateX(0) translateY(0); }
    100% { transform: translateX(-60px) translateY(-60px); }
}

.hero-slider {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide {
    display: none;
    width: 100%;
    height: 100%;
    align-items: center;
    justify-content: center;
    position: relative;
}

.slide.active {
    display: flex;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
    color: white;
    position: relative;
    z-index: 2;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    line-height: 1.2;
}

.hero-text p {
    font-size: 1.3rem;
    margin-bottom: 40px;
    opacity: 0.9;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    margin-bottom: 60px;
}

.hero-buttons .btn {
    margin: 0 15px;
    padding: 15px 40px;
    font-size: 18px;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    max-width: 800px;
    margin: 0 auto;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

.hero-nav {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    z-index: 3;
}

.nav-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.5);
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-dot.active {
    background: white;
    border-color: white;
}

/* 区域标题 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 15px;
    position: relative;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.section-header p {
    font-size: 1.1rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* 服务内容 */
.services {
    padding: 100px 0;
    background: #f8f9fa;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.service-card {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    border-color: #667eea;
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 35px;
    color: white;
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #333;
}

.service-card > p {
    color: #666;
    margin-bottom: 25px;
    line-height: 1.6;
}

.service-features {
    list-style: none;
    padding: 0;
}

.service-features li {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    color: #555;
    font-size: 14px;
}

.service-features i {
    color: #28a745;
    margin-right: 10px;
    font-size: 12px;
}

/* 服务优势 */
.advantages {
    padding: 100px 0;
    background: white;
}

.advantages-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
}

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

.advantage-item {
    display: flex;
    align-items: flex-start;
    padding: 25px;
    border-radius: 15px;
    transition: all 0.3s ease;
    border: 1px solid #f0f0f0;
}

.advantage-item:hover {
    background: #f8f9fa;
    border-color: #667eea;
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.advantage-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 20px;
    font-size: 24px;
    color: white;
    flex-shrink: 0;
}

.advantage-info h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

.advantage-info p {
    color: #666;
    line-height: 1.6;
    font-size: 14px;
}

.advantages-image {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.2);
}

.advantages-image img {
    width: 100%;
    height: auto;
    display: block;
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.8) 0%, rgba(118, 75, 162, 0.8) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.advantages-image:hover .image-overlay {
    opacity: 1;
}

.overlay-content {
    text-align: center;
    color: white;
    padding: 20px;
}

.overlay-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 10px;
}

/* 关于我们 */
.about {
    padding: 100px 0;
    background: #f8f9fa;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text .section-header {
    text-align: left;
    margin-bottom: 30px;
}

.about-description p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-features {
    margin-top: 40px;
}

.feature-item {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    padding: 15px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.feature-item i {
    font-size: 24px;
    color: #667eea;
    margin-right: 15px;
}

.feature-text h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 5px;
    color: #333;
}

.feature-text p {
    color: #666;
    font-size: 14px;
    margin: 0;
}

.about-image {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.2);
}

.about-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.about-stats {
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

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

.stat-item .stat-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 5px;
}

.stat-item .stat-label {
    font-size: 12px;
    color: #666;
}

/* 产品案例 */
.products {
    padding: 100px 0;
    background: white;
}

.products-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 50px;
    gap: 10px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 30px;
    border: 2px solid #e0e0e0;
    background: white;
    color: #666;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.tab-btn.active,
.tab-btn:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-color: #667eea;
    color: white;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

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

.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;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

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

.product-image {
    height: 200px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.product-image img{
    height: 100%;
    width: 100%;
    object-fit: cover;
}

.product-placeholder {
    font-size: 60px;
    color: #667eea;
    opacity: 0.3;
}

.product-info {
    padding: 25px;
}

.product-info h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

.product-info p {
    color: #666;
    margin-bottom: 15px;
    line-height: 1.6;
    font-size: 14px;
}

.product-features {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.feature-tag {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 500;
}

/* 新闻资讯 */
.news {
    padding: 100px 0;
    background: #f8f9fa;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

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

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

.news-card.featured {
    grid-column: span 2;
}

.news-card.featured .news-content {
    display: grid;
    /*grid-template-columns: 1fr 1fr;*/
    align-items: center;
}

.news-image {
    height: 200px;
    position: relative;
    overflow: hidden;
}

.news-card.featured .news-image {
    height: 300px;
}

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

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

.news-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 5px 15px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 600;
}

.news-content {
    padding: 25px;
}

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

.news-category {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.news-date {
    color: #999;
    font-size: 12px;
}

.news-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
    line-height: 1.4;
}

.news-content p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
    font-size: 14px;
}

.read-more {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: all 0.3s ease;
}

.read-more:hover {
    color: #764ba2;
    gap: 8px;
}

/* 常见问题 */
.faq {
    padding: 100px 0;
    background: white;
}

.faq-categories {
    display: flex;
    justify-content: center;
    margin-bottom: 50px;
    gap: 15px;
    flex-wrap: wrap;
}

.category-btn {
    padding: 10px 25px;
    border: 2px solid #e0e0e0;
    background: white;
    color: #666;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    font-size: 14px;
}

.category-btn.active,
.category-btn:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-color: #667eea;
    color: white;
}

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

.faq-item {
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 15px;
    margin-bottom: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: #667eea;
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.1);
}

.faq-question {
    padding: 25px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #f8f9fa;
    transition: all 0.3s ease;
}

.faq-item.active .faq-question {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.faq-question h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: inherit;
    margin: 0;
}

.faq-question i {
    font-size: 18px;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 25px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 25px;
    max-height: 500px;
}

.faq-answer p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
}

.faq-answer ul,
.faq-answer ol {
    color: #666;
    padding-left: 20px;
    line-height: 1.6;
}

.faq-answer li {
    margin-bottom: 8px;
}

/* 客户评价 */
.testimonials {
    padding: 100px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
}

.testimonials::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.05"><circle cx="7" cy="7" r="7"/></g></svg>');
    animation: backgroundMove 20s linear infinite;
}

.testimonials-slider {
    position: relative;
    max-width: 800px;
    margin: 0 auto 60px;
}

.testimonial-item {
    display: none;
    text-align: center;
    padding: 40px 20px;
}

.testimonial-item.active {
    display: block;
}

.testimonial-content {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 25px;
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.testimonial-text {
    margin-bottom: 30px;
}

.testimonial-text i {
    font-size: 30px;
    color: rgba(255, 255, 255, 0.3);
    margin-bottom: 20px;
}

.testimonial-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin: 0;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
}

.author-info h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.author-info span {
    opacity: 0.8;
    font-size: 14px;
    margin-bottom: 10px;
    display: block;
}

.rating {
    display: flex;
    gap: 5px;
    justify-content: center;
}

.rating i {
    color: #ffd700;
    font-size: 14px;
}

.testimonial-nav {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 60px;
}

.nav-btn {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.5);
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-btn.active {
    background: white;
    border-color: white;
}

.testimonial-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

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

.testimonial-stats .stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.testimonial-stats .stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: #f8f9fa;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    padding: 25px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 20px;
    font-size: 24px;
    color: white;
    flex-shrink: 0;
}

.contact-details h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

.contact-details p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

.contact-form {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 14px;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form .btn {
    width: 100%;
    padding: 15px;
    font-size: 16px;
    margin-top: 20px;
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    padding: 60px 0 20px;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-logo i {
    margin-right: 10px;
    font-size: 28px;
    color: #667eea;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin-bottom: 20px;
}

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

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

.social-links a:hover {
    background: #667eea;
    transform: translateY(-3px);
}

/* Flink */
.flink-section {
    background: white;
    color: #2d3748;
    padding: 30px 0;
}
.flink-header{
    font-size: 20px;
    font-weight: 600;
    padding-bottom: 10px;
}
.flink-section li{
    list-style: none;
    display: inline;
    padding-right: 20px;
}
.flink-section a{
    color: #718096;
    text-decoration: none;
}

.footer-section h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

.footer-links {
    list-style: none;
    padding: 0;
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 14px;
}

.footer-links a:hover {
    color: #667eea;
}

.contact-info-footer p {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.contact-info-footer i {
    margin-right: 10px;
    color: #667eea;
    width: 16px;
}

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

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom-links {
    display: flex;
    gap: 20px;
}

.footer-bottom-links a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-bottom-links a:hover {
    color: #667eea;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
    z-index: 999;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.4);
}

.back-to-top.show {
    display: flex;
}

/* 悬浮联系窗口 */
.floating-contact {
    position: fixed;
    bottom: 100px;
    right: 30px;
    z-index: 999;
}

.floating-btn {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 5px 20px rgba(40, 167, 69, 0.3);
    transition: all 0.3s ease;
}

.floating-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(40, 167, 69, 0.4);
}

.floating-menu {
    position: absolute;
    bottom: 70px;
    right: 0;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    padding: 15px;
    min-width: 150px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
}

.floating-contact:hover .floating-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.floating-item {
    display: flex;
    align-items: center;
    padding: 10px 15px;
    text-decoration: none;
    color: #333;
    border-radius: 8px;
    margin-bottom: 5px;
    transition: background 0.3s ease;
    font-size: 14px;
}

.floating-item:hover {
    background: #f8f9fa;
}

.floating-item:last-child {
    margin-bottom: 0;
}

.floating-item i {
    margin-right: 10px;
    width: 16px;
    color: #667eea;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar{
        position: unset;
    }
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        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;
        display: block;
    }

    .nav-menu li {
        margin: 10px 0;
    }

    .nav-toggle {
        display: flex;
    }

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

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

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

    .hero-text p {
        font-size: 1.1rem;
    }

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

    .stat-number {
        font-size: 2.5rem !important;
    }

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

    .advantages-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-stats {
        position: relative;
        bottom: auto;
        left: auto;
        right: auto;
        background: white;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        margin-top: 20px;
    }

    .products-tabs {
        justify-content: flex-start;
        overflow-x: auto;
        padding: 0 20px;
        margin-bottom: 30px;
    }

    .tab-btn {
        white-space: nowrap;
    }

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

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

    .news-card.featured {
        grid-column: span 1;
    }

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

    .faq-categories {
        justify-content: flex-start;
        overflow-x: auto;
        padding: 0 20px;
    }

    .category-btn {
        white-space: nowrap;
    }

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

    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-bottom-content {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero-text h1 {
        font-size: 2rem;
    }

    .hero-buttons .btn {
        display: block;
        margin: 10px auto;
        width: 200px;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .service-card,
    .contact-form {
        padding: 25px 20px;
    }

    .floating-contact {
        bottom: 80px;
        right: 20px;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #5a6fd8 0%, #6a4c93 100%);
}