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

body {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}

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

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 700;
}

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

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    width: 100%;
    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: 80px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 0;
}

.logo-img {
    height: 40px;
    width: auto;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.logo-text h2 {
    color: #2c3e50;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.logo-text span {
    color: #666;
    font-size: 0.9rem;
    display: block;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: all 0.3s;
    position: relative;
    padding: 10px 0;
}

.nav-menu a:hover {
    color: #3498db;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #3498db;
    transition: width 0.3s;
}

.nav-menu a:hover::after {
    width: 100%;
}

/* 主页横幅 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    color: #2c3e50;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}



.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    z-index: -1;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    font-weight: 700;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 15px;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 40px;
    opacity: 0.8;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    display: inline-block;
    padding: 15px 35px;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: #3498db;
    color: white;
}

.btn-primary:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(52, 152, 219, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #2c3e50;
    border: 2px solid #2c3e50;
}

.btn-secondary:hover {
    background: white;
    color: #3498db;
    transform: translateY(-2px);
}

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

.stat-item {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    padding: 30px 20px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}

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

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

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

.service-card {
    background: white;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s;
    border: 1px solid #f0f0f0;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 2rem;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #2c3e50;
    font-weight: 600;
}

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

.service-features {
    list-style: none;
    text-align: left;
}

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

.service-features i {
    color: #27ae60;
    margin-right: 10px;
    font-size: 0.9rem;
}

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

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

.about-intro {
    text-align: center;
    margin-bottom: 60px;
}

.about-description {
    font-size: 1.2rem;
    color: #666;
    line-height: 1.8;
    margin-bottom: 25px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 80px;
    text-align: center;
}

.about-stats .stat-item {
    padding: 30px 20px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 15px;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(30px);
}

.about-stats .stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.about-stats .stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 10px;
}

.about-stats .stat-label {
    font-size: 1rem;
    color: #666;
    font-weight: 500;
}

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

.feature-card {
    background: rgba(255, 255, 255, 0.8);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 1.8rem;
    color: white;
}

.feature-card h3 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* 核心优势 */
.advantages {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    color: #2c3e50;
}

.advantages .section-header h2,
.advantages .section-header p {
    color: #2c3e50;
}

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

.advantage-card {
    background: rgba(255, 255, 255, 0.8);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.advantage-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 1.8rem;
    color: white;
}

.advantage-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.advantage-card p {
    opacity: 0.9;
    line-height: 1.6;
}

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

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

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 40px;
    gap: 20px;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-details h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #2c3e50;
    font-weight: 600;
}

.contact-details p {
    color: #666;
    margin-bottom: 5px;
}

.contact-form {
    background: white;
    padding: 50px;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

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

.contact-form input,
.contact-form textarea,
.contact-form select {
    width: 100%;
    padding: 15px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
    background: #f8f9fa;
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
    outline: none;
    border-color: #3498db;
    background: white;
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form .btn {
    width: 100%;
    font-size: 1.1rem;
    padding: 18px;
}

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

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.footer-logo-img {
    height: 35px;
    width: auto;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
    margin-right: 10px;
}

.footer-logo h3 {
    font-size: 1.3rem;
    font-weight: 600;
}

.footer-section p {
    color: #bdc3c7;
    line-height: 1.6;
    margin-bottom: 20px;
}

.footer-section p {
    color: #bdc3c7;
    line-height: 1.6;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-section p i {
    color: #bdc3c7;
    width: 14px;
}

.footer-section h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    font-weight: 600;
}

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

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

.footer-section ul li a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: #3498db;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    background: #34495e;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s;
}

.social-links a:hover {
    background: #3498db;
    transform: translateY(-2px);
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 30px;
    text-align: center;
    color: #bdc3c7;
}

.footer-bottom p {
    margin-bottom: 10px;
}

.beian-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 10px;
}

.beian-icon {
    width: 16px;
    height: 16px;
}

.footer-bottom a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-bottom a:hover {
    color: #3498db;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        max-width: 100%;
        padding: 0 20px;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .about-features {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        min-height: 80vh;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .service-card {
        padding: 30px 20px;
    }
    
    .contact-form {
        padding: 30px 20px;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
}