/* Global Styles */
:root {
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --accent-color: #f39c12;
    --text-color: #333;
    --light-color: #f9f9f9;
    --dark-color: #2c3e50;
    --card-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-color);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

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

a:hover {
    color: var(--secondary-color);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

.section-title {
    text-align: center;
    margin-bottom: 2.5rem;
    color: var(--dark-color);
    position: relative;
    font-size: 2rem;
}

.section-title::after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background: var(--accent-color);
    margin: 10px auto 0;
}

section {
    padding: 5rem 0;
}

.btn-primary {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 14px 32px;
    border-radius: 50px;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 1px;
    transition: all 0.4s ease;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background: var(--secondary-color);
    transition: all 0.4s ease;
    z-index: -1;
    border-radius: 50px;
}

.btn-primary:hover {
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(52, 152, 219, 0.4);
}

.btn-primary:hover:before {
    width: 100%;
}

.btn-secondary {
    display: inline-block;
    background: transparent;
    color: var(--primary-color);
    padding: 14px 32px;
    border-radius: 50px;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 1px;
    transition: all 0.4s ease;
    border: 2px solid var(--primary-color);
    cursor: pointer;
    position: relative;j
    overflow: hidden;
    z-index: 1;
}

.btn-secondary:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background: var(--primary-color);
    transition: all 0.4s ease;
    z-index: -1;
    border-radius: 50px;
}

.btn-secondary:hover {
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(52, 152, 219, 0.3);
}

.btn-secondary:hover:before {
    width: 100%;
}

.btn {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 14px 32px;
    border-radius: 50px;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 1px;
    transition: all 0.4s ease;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background: var(--secondary-color);
    transition: all 0.4s ease;
    z-index: -1;
    border-radius: 50px;
}

.btn:hover {
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(52, 152, 219, 0.4);
}

.btn:hover:before {
    width: 100%;
}

/* Header Styles */
header {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 15px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    max-height: 50px;
    width: auto;
}

.footer-logo-img {
    max-height: 60px;
    width: auto;
    margin-bottom: 10px;
}

nav ul {
    display: flex;
}

nav ul li {
    margin-left: 1.5rem;
}

nav ul li a {
    color: var(--dark-color);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: all 0.3s ease;
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
    border-radius: 2px;
}

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

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

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

nav ul li a.active::after {
    width: 100%;
    background: var(--primary-color);
    height: 3px;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('/img/ck.jpg');
    background-size: cover;
    background-position: center;
    color: white;
    text-align: center;
    padding: 8rem 0;
}

.hero-content h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* About Section */
.about {
    background-color: white;
    padding: 5rem 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    align-items: center;
}

.about-image {
    overflow: hidden;
    border-radius: 12px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
    position: relative;
}

.about-image:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.7) 0%, rgba(41, 128, 185, 0.4) 100%);
    opacity: 0;
    transition: all 0.4s ease;
    z-index: 1;
}

.about-image:hover:before {
    opacity: 1;
}

.about-img {
    width: 100%;
    height: auto;
    transition: transform 0.5s ease;
    display: block;
}

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

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--text-color);
    line-height: 1.8;
    font-size: 1.05rem;
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 2.5rem;
    background: linear-gradient(135deg, #f7f9fc 0%, #e8f4fd 100%);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(52, 152, 219, 0.1);
}

.highlight {
    text-align: center;
    position: relative;
    padding: 20px 15px;
    border-radius: 10px;
    transition: all 0.4s ease;
    background-color: white;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.highlight:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(52, 152, 219, 0.15);
}

.highlight:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--primary-color);
    transition: all 0.4s ease;
}

.highlight:hover:before {
    height: 100%;
}

.highlight-number {
    font-size: 2.8rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    transition: all 0.3s ease;
}

.highlight:hover .highlight-number {
    transform: scale(1.1);
    color: var(--secondary-color);
}

.highlight-text {
    font-size: 1.1rem;
    color: var(--dark-color);
    font-weight: 500;
    transition: all 0.3s ease;
}

.highlight:hover .highlight-text {
    color: var(--primary-color);
}

.about-image-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0));
    padding: 20px;
    z-index: 2;
    transform: translateY(100%);
    transition: all 0.4s ease;
}

.about-image:hover .about-image-caption {
    transform: translateY(0);
}

.about-image-caption h3 {
    color: white;
    font-size: 1.3rem;
    text-align: center;
    margin: 0;
}

@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-highlights {
        grid-template-columns: repeat(2, 1fr);
        padding: 20px;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .about-highlights {
        grid-template-columns: repeat(2, 1fr);
        padding: 15px;
        gap: 10px;
    }
    
    .highlight {
        padding: 15px 10px;
    }
    
    .highlight-number {
        font-size: 2.2rem;
    }
    
    .highlight-text {
        font-size: 0.9rem;
    }
}

@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-image {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .about-image-caption {
        transform: translateY(0);
        background: rgba(41, 128, 185, 0.8);
    }
}

/* Services Section */
.services {
    background-color: var(--light-color);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--light-color);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--card-shadow);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.service-card .icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-size: 1.8rem;
}

.service-card h3 {
    margin-bottom: 1rem;
    color: var(--dark-color);
}

/* Advantages Section */
.advantages {
    background-color: var(--light-color);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.advantage-card {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--card-shadow);
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.advantage-card .icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-color);
    color: white;
    border-radius: 50%;
    font-size: 1.8rem;
}

.advantage-card h3 {
    margin-bottom: 1rem;
    color: var(--dark-color);
}

/* Cases Section */
.cases {
    background-color: white;
    padding: 5rem 0;
}

.section-description {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
    color: var(--text-color);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.case-card {
    background: var(--light-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

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

.case-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.case-content {
    padding: 1.5rem;
}

.case-content h3 {
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

.case-category {
    font-size: 0.9rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.case-category span {
    font-weight: bold;
    color: var(--dark-color);
}

.case-content p {
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.case-results {
    display: flex;
    justify-content: space-between;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    padding-top: 1rem;
}

.result {
    text-align: center;
    flex: 1;
}

.result-number {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.2rem;
}

.result-text {
    font-size: 0.8rem;
    color: var(--text-color);
}

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

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

/* Testimonials Section */
.testimonials {
    background-color: var(--light-color);
}

.testimonial-slider {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 2rem;
    padding: 1rem 0;
}

.testimonial-slider::-webkit-scrollbar {
    display: none;
}

.testimonial {
    flex: 0 0 calc(33.333% - 2rem);
    scroll-snap-align: start;
    background: var(--light-color);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

.testimonial:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.testimonial .quote {
    font-style: italic;
    margin-bottom: 1.5rem;
    position: relative;
    padding-left: 1.5rem;
    border-left: 3px solid var(--accent-color);
}

.testimonial .author {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.testimonial .name {
    font-weight: bold;
    color: var(--dark-color);
}

.testimonial .role {
    color: var(--primary-color);
    font-size: 0.9rem;
}

/* FAQ Section */
.faq {
    background-color: var(--light-color);
}

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

.faq-item {
    background: white;
    border-radius: 8px;
    margin-bottom: 1rem;
    box-shadow: var(--card-shadow);
    overflow: hidden;
}

.question {
    font-weight: bold;
    padding: 1.5rem;
    cursor: pointer;
    position: relative;
    color: var(--dark-color);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.answer {
    padding: 1.5rem;
    color: var(--text-color);
}

/* Partners Section */
.partners {
    background-color: white;
    padding: 5rem 0;
}

.partners-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    margin-top: 3rem;
}

.partner-logo {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 80px;
    width: 150px;
    filter: grayscale(100%);
    opacity: 0.7;
    transition: var(--transition);
}

.partner-logo:hover {
    filter: grayscale(0);
    opacity: 1;
    transform: scale(1.1);
}

.partner-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

@media (max-width: 768px) {
    .partners-logos {
        gap: 2rem;
    }
    
    .partner-logo {
        height: 60px;
        width: 120px;
    }
}

/* Contact Section */
.contact {
    background-color: var(--light-color);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
}

.contact-info {
    padding: 2rem;
    background: var(--light-color);
    border-radius: 8px;
    box-shadow: var(--card-shadow);
}

.contact-info p {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.contact-info i {
    margin-right: 1rem;
    color: var(--primary-color);
    font-size: 1.2rem;
}

.contact-form {
    padding: 2rem;
    background: var(--light-color);
    border-radius: 8px;
    box-shadow: var(--card-shadow);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

/* Footer */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo h3 {
    color: white;
    margin-bottom: 0.5rem;
}

.footer-links h4,
.footer-social h4 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.footer-links ul li {
    margin-bottom: 0.5rem;
}

.footer-links ul li a {
    color: rgba(255, 255, 255, 0.7);
}

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

.social-icons {
    display: flex;
    gap: 1rem;
}

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

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-highlights {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .testimonial {
        flex: 0 0 calc(100% - 2rem);
    }
    
    nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex !important;
        align-items: center;
        justify-content: center;
        position: fixed;
        top: 15px;
        right: 15px;
        width: 44px;
        height: 44px;
        background-color: rgba(52, 152, 219, 0.1);
        border-radius: 4px;
        color: #3498db;
        z-index: 1000;
        font-size: 2rem;
        border: none;
        cursor: pointer;
        transition: all 0.2s ease-in-out;
    }
    
    .mobile-menu-btn:hover,
    .mobile-menu-btn:focus {
        background-color: rgba(52, 152, 219, 0.3);
        transform: scale(1.05);
    }
    
    .services-grid,
    .advantages-grid,
    .cases-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .footer-logo, .footer-links, .footer-social {
        justify-content: center;
        align-items: center;
    }
    
    .social-icons {
        justify-content: center;
    }
    
    .about-text p {
        text-align: center;
    }
}

@media (max-width: 576px) {
    .section-title {
        font-size: 1.5rem;
    }
    
    .services-grid,
    .advantages-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-content h1 {
        font-size: 1.6rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .highlight-number {
        font-size: 2rem;
    }
    
    .btn-primary, .btn-secondary {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .about-highlights {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }
    
    .case-results {
        flex-direction: column;
        gap: 1rem;
    }
    
    .footer-bottom {
        font-size: 0.8rem;
    }
}

/* Mobile Navigation */
.mobile-menu-btn {
    display: none;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 1001;
}

.mobile-menu-btn:hover {
    background-color: var(--secondary-color);
}

/* 移动菜单 */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100vh;
    background-color: #fff;
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 20px;
    transition: right 0.3s ease;
    overflow-y: auto;
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-color);
    cursor: pointer;
}

.mobile-menu-header {
    text-align: center;
    margin-bottom: 30px;
    padding-top: 10px;
}

.mobile-logo-img {
    max-width: 150px;
}

.mobile-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-menu ul li {
    margin-bottom: 15px;
}

.mobile-menu ul li a {
    position: relative;
    transition: all 0.3s ease;
    padding-left: 0;
}

.mobile-menu ul li a:hover {
    padding-left: 10px;
    color: var(--primary-color);
}

.mobile-menu ul li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.mobile-menu ul li a:hover::after {
    width: 100%;
}

.mobile-contact {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.mobile-contact p {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    font-size: 0.9rem;
    color: var(--text-color);
}

.mobile-contact p i {
    margin-right: 10px;
    color: var(--primary-color);
    width: 20px;
}

/* 遮罩层 */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
    display: none;
    transition: opacity 0.3s ease;
}

.overlay.active {
    display: block;
}

/* 响应式布局 */
@media (max-width: 1200px) {
    .container {
        width: 90%;
    }
    
    .services-grid, 
    .advantages-grid,
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .about-container {
        flex-direction: column;
    }
    
    .about-image,
    .about-content {
        width: 100%;
    }
    
    .about-image {
        margin-bottom: 30px;
    }
    
    .contact-container {
        flex-direction: column;
    }
    
    .contact-info,
    .contact-form {
        width: 100%;
    }
    
    .contact-info {
        margin-bottom: 30px;
    }
}

@media (max-width: 768px) {
    header .container {
        padding: 15px 0;
    }
    
    nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .hero {
        padding: 100px 0 70px;
    }
    
    .services-grid, 
    .advantages-grid,
    .cases-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .testimonial-card {
        padding: 20px;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .hero {
        padding: 80px 0 50px;
    }
    
    .section {
        padding: 50px 0;
    }
    
    .btn {
        padding: 10px 20px;
    }
    
    .footer {
        padding: 40px 0;
    }
}

/* 滚动动画效果 */
.service-card, .advantage-card, .case-card, .testimonial {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.service-card.scrolled, .advantage-card.scrolled, .case-card.scrolled, .testimonial.scrolled {
    opacity: 1;
    transform: translateY(0);
}

/* 错开动画时间 */
.service-card:nth-child(2), .advantage-card:nth-child(2), .case-card:nth-child(2) {
    transition-delay: 0.2s;
}

.service-card:nth-child(3), .advantage-card:nth-child(3), .case-card:nth-child(3) {
    transition-delay: 0.4s;
}

.service-card:nth-child(4), .advantage-card:nth-child(4), .case-card:nth-child(4) {
    transition-delay: 0.6s;
}

/* 语言切换器 */
.language-switcher {
    display: flex;
    align-items: center;
    margin-left: 20px;
    margin-right: 15px;
}

.language-switcher a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 35px;
    height: 35px;
    margin-left: 5px;
    border-radius: 50%;
    font-weight: 500;
    color: var(--dark-color);
    transition: all 0.3s ease;
    background: transparent;
    border: 1px solid transparent;
}

.language-switcher a.active {
    background: var(--primary-color);
    color: white;
    transform: scale(1.05);
    box-shadow: 0 4px 8px rgba(52, 152, 219, 0.3);
}

.language-switcher a:hover:not(.active) {
    background: rgba(52, 152, 219, 0.1);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.language-mobile {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.language-mobile p {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    font-size: 0.9rem;
    color: var(--text-color);
}

.language-mobile p i {
    margin-right: 10px;
    color: var(--primary-color);
}

.language-options {
    display: flex;
    flex-direction: column;
    padding-left: 30px;
}

.language-options a {
    display: block;
    padding: 8px 10px;
    margin-bottom: 5px;
    border-radius: 4px;
    color: var(--text-color);
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.language-options a.active {
    background-color: var(--primary-color);
    color: white;
}

.language-options a:hover:not(.active) {
    background-color: #f5f5f5;
}

@media (max-width: 768px) {
    .language-switcher {
        display: none;
    }
}

/* Form Elements Enhancement */
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    margin-bottom: 1.5rem;
    border: 1px solid #e1e1e1;
    border-radius: 8px;
    font-size: 1rem;
    color: var(--text-color);
    transition: all 0.3s ease;
    background-color: #f9f9f9;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
    background-color: #fff;
    transform: translateY(-2px);
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark-color);
    transition: all 0.3s ease;
}

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group select:focus + label {
    color: var(--primary-color);
}

/* Button Animation Enhancement */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(52, 152, 219, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(52, 152, 219, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(52, 152, 219, 0);
    }
}

.btn-primary:hover {
    animation: pulse 1.5s infinite;
}

/* Social Icons Enhancement */
.social-icons a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.social-icons a:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background: var(--primary-color);
    transition: all 0.3s ease;
    z-index: -1;
    transform: rotate(45deg);
    transform-origin: 0 0;
}

.social-icons a:hover {
    transform: translateY(-3px) rotate(5deg);
}

.social-icons a:hover:before {
    width: 200%;
}

/* Service Card Enhancement */
.service-card, 
.advantage-card, 
.case-card {
    transition: all 0.4s ease;
}

.service-card:hover, 
.advantage-card:hover, 
.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.service-card .icon,
.advantage-card .icon {
    transition: all 0.4s ease;
}

.service-card:hover .icon,
.advantage-card:hover .icon {
    transform: scale(1.1) rotate(10deg);
    color: var(--primary-color);
}

/* FAQ Enhancement */
.faq-question {
    transition: all 0.3s ease;
}

.faq-question:hover {
    background-color: rgba(52, 152, 219, 0.05);
    padding-left: 25px;
}

.faq-question.active {
    background-color: rgba(52, 152, 219, 0.1);
    border-left: 3px solid var(--primary-color);
    padding-left: 22px;
}

.faq-icon {
    transition: all 0.3s ease;
}

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