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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

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

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

.navbar {
    background-color: var(--bg-white);
    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 h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 700;
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
}

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

.lang-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s;
}

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

.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

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

.btn-secondary {
    background-color: var(--accent-color);
    color: white;
}

.btn-secondary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

.features {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
    font-weight: 700;
}

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

.feature-card {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
}

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

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

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.7;
}

.industries {
    padding: 5rem 0;
}

.industry-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.industry-item {
    background-color: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    transition: transform 0.3s;
}

.industry-item:hover {
    transform: translateX(5px);
}

.industry-item h4 {
    color: var(--text-dark);
    font-size: 1.1rem;
}

.cta {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
    color: white;
    padding: 5rem 0;
    text-align: center;
}

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

.cta p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

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

.page-header p {
    font-size: 1.1rem;
    opacity: 0.95;
}

.content-section {
    padding: 5rem 0;
}

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

.about-content h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

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

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.placeholder-image {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 5rem;
}

.values-section {
    padding: 5rem 0;
    background-color: var(--bg-light);
}

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

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

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

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

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

.stats-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-item h3 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.stat-item p {
    font-size: 1.1rem;
    opacity: 0.95;
}

.services-detail {
    padding: 5rem 0;
}

.service-item {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    padding: 2rem;
    background-color: var(--bg-light);
    border-radius: 10px;
}

.service-icon {
    font-size: 3rem;
    flex-shrink: 0;
}

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

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

.solutions-grid {
    padding: 5rem 0;
}

.solution-card {
    background-color: var(--bg-white);
    padding: 2rem;
    margin-bottom: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-color);
    transition: transform 0.3s;
}

.solution-card:hover {
    transform: translateX(5px);
}

.solution-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.solution-card p {
    color: var(--text-light);
    line-height: 1.7;
}

.contact-section {
    padding: 5rem 0;
}

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

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

.info-item {
    margin-bottom: 2rem;
}

.info-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
    font-weight: 600;
}

.info-item p {
    color: var(--text-light);
}

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

.form-group {
    position: relative;
    margin-bottom: 2rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s;
    font-family: inherit;
}

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

.form-group label {
    position: absolute;
    left: 1rem;
    top: 1rem;
    color: var(--text-light);
    transition: all 0.3s;
    pointer-events: none;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -0.75rem;
    left: 0.75rem;
    font-size: 0.875rem;
    background-color: white;
    padding: 0 0.5rem;
    color: var(--primary-color);
}

.legal-content {
    padding: 3rem 0;
}

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

.legal-section h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.legal-section p,
.legal-section ul {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.legal-section ul {
    padding-left: 2rem;
}

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

.legal-section a {
    color: var(--primary-color);
    text-decoration: none;
}

.legal-section a:hover {
    text-decoration: underline;
}

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

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: white;
}

.footer-section p {
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.footer-section a {
    color: white;
    text-decoration: none;
    opacity: 0.9;
    transition: opacity 0.3s;
}

.footer-section a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.8;
}

@media (max-width: 768px) {
    .nav-menu {
        flex-wrap: wrap;
        gap: 1rem;
        justify-content: center;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .service-item {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 2rem;
    }
}