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

:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --text-color: #34495e;
    --border-color: #bdc3c7;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

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

.navbar {
    background-color: #fff;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 0;
}

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

.lang-toggle {
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.lang-toggle:hover {
    background-color: #2980b9;
}

.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 100px 0;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: transparent;
    color: #fff;
    border-color: #fff;
}

.btn-secondary {
    background-color: transparent;
    color: #fff;
    border-color: #fff;
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--dark-color);
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: #fff;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: var(--dark-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

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

.services-preview {
    padding: 80px 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background-color: var(--light-color);
    padding: 2rem;
    border-radius: 10px;
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

.service-card:hover {
    border-left-width: 8px;
    transform: translateX(5px);
}

.service-card h3 {
    color: var(--dark-color);
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

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

.cta {
    background-color: var(--primary-color);
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.footer {
    background-color: var(--dark-color);
    color: #fff;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.footer-section p,
.footer-section a {
    color: #bdc3c7;
    text-decoration: none;
    line-height: 2;
}

.footer-section a:hover {
    color: #fff;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #34495e;
    color: #95a5a6;
}

.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 60px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.about-content,
.services-detail,
.contact-section,
.legal-content {
    padding: 60px 0;
}

.about-section {
    margin-bottom: 3rem;
}

.about-section h2 {
    color: var(--dark-color);
    margin-bottom: 1rem;
    font-size: 2rem;
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
}

.about-section h3 {
    color: var(--dark-color);
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.about-section p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.value-card {
    background-color: var(--light-color);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
}

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

.industry-list {
    list-style: none;
    margin-top: 1rem;
}

.industry-list li {
    padding: 0.8rem;
    margin-bottom: 0.5rem;
    background-color: var(--light-color);
    border-radius: 5px;
    border-left: 3px solid var(--secondary-color);
}

.company-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.info-item {
    background-color: var(--light-color);
    padding: 1.5rem;
    border-radius: 8px;
}

.info-item strong {
    display: block;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.service-detail-card {
    background-color: #fff;
    padding: 2.5rem;
    margin-bottom: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.service-detail-card h2 {
    color: var(--dark-color);
    margin-bottom: 1rem;
    font-size: 1.8rem;
}

.service-detail-card p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.service-detail-card ul {
    list-style: none;
    margin-top: 1rem;
}

.service-detail-card ul li {
    padding: 0.8rem;
    margin-bottom: 0.5rem;
    background-color: var(--light-color);
    border-radius: 5px;
    padding-left: 2rem;
    position: relative;
}

.service-detail-card ul li::before {
    content: "✓";
    position: absolute;
    left: 0.8rem;
    color: var(--secondary-color);
    font-weight: bold;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.contact-info h2 {
    color: var(--dark-color);
    margin-bottom: 2rem;
    font-size: 2rem;
}

.contact-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: var(--light-color);
    border-radius: 8px;
}

.contact-icon {
    font-size: 2rem;
}

.contact-item h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.contact-item a {
    color: var(--text-color);
    text-decoration: none;
}

.contact-item a:hover {
    color: var(--primary-color);
}

.contact-form-container {
    background-color: var(--light-color);
    padding: 2rem;
    border-radius: 10px;
}

.contact-form-container h2 {
    color: var(--dark-color);
    margin-bottom: 1.5rem;
    font-size: 2rem;
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

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

.contact-form button {
    width: 100%;
    cursor: pointer;
}

.business-hours,
.company-details {
    margin-top: 3rem;
}

.business-hours h2,
.company-details h2 {
    color: var(--dark-color);
    margin-bottom: 2rem;
    font-size: 2rem;
}

.hours-grid,
.details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.hours-item,
.detail-item {
    background-color: var(--light-color);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
}

.hours-item strong,
.detail-item strong {
    display: block;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.legal-text {
    max-width: 900px;
    margin: 0 auto;
}

.legal-text h2 {
    color: var(--dark-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.8rem;
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
}

.legal-text h3 {
    color: var(--dark-color);
    margin-top: 1.5rem;
    margin-bottom: 0.8rem;
    font-size: 1.3rem;
}

.legal-text p {
    margin-bottom: 1rem;
    line-height: 1.8;
    text-align: justify;
}

.legal-text ul {
    margin: 1rem 0 1rem 2rem;
    line-height: 2;
}

.legal-text ul li {
    margin-bottom: 0.5rem;
}

@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

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

    .contact-grid {
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        padding: 60px 0;
    }

    .hero-title {
        font-size: 1.8rem;
    }
}