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

:root {
    --primary-color: #2563eb;
    --secondary-color: #7c3aed;
    --accent-color: #06b6d4;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --text-color: #334155;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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: var(--light-color);
}

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

/* 导航栏 */
.navbar {
    background: 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;
}

.nav-brand 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-color);
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem 0;
}

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

.lang-switch {
    padding: 0.5rem 1rem !important;
    background: var(--primary-color);
    color: white !important;
    border-radius: 6px;
    transition: background 0.3s ease;
}

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

/* 主视觉区 */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 8rem 0;
    text-align: center;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

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

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

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

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

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

/* 特色服务 */
.features {
    padding: 6rem 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 4rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.feature-card {
    padding: 2.5rem;
    background: var(--light-color);
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    color: var(--dark-color);
    margin-bottom: 1rem;
    font-weight: 600;
}

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

/* 服务行业 */
.industries {
    padding: 6rem 0;
    background: var(--light-color);
}

.industries-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.industry-item {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    border-left: 4px solid var(--accent-color);
    transition: all 0.3s ease;
}

.industry-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-lg);
}

.industry-item h4 {
    font-size: 1.3rem;
    color: var(--dark-color);
    margin-bottom: 0.8rem;
    font-weight: 600;
}

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

/* 行动号召 */
.cta {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.cta p {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
}

/* 页脚 */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h3,
.footer-col h4 {
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.footer-col p {
    margin-bottom: 0.8rem;
    opacity: 0.9;
    line-height: 1.8;
}

.footer-col a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-col a:hover {
    color: var(--accent-color);
}

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

/* 内容页面样式 */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 5rem 0 3rem;
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-content {
    padding: 4rem 0;
    background: white;
}

.content-section {
    max-width: 900px;
    margin: 0 auto 3rem;
}

.content-section h2 {
    font-size: 2rem;
    color: var(--dark-color);
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.content-section h3 {
    font-size: 1.5rem;
    color: var(--dark-color);
    margin: 2rem 0 1rem;
    font-weight: 600;
}

.content-section p {
    margin-bottom: 1.2rem;
    line-height: 1.8;
}

.content-section ul,
.content-section ol {
    margin-left: 2rem;
    margin-bottom: 1.5rem;
}

.content-section li {
    margin-bottom: 0.8rem;
    line-height: 1.8;
}

/* 联系表单 */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background: var(--light-color);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

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

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.info-card {
    background: var(--light-color);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
}

.info-card h3 {
    color: var(--dark-color);
    margin-bottom: 1rem;
    font-weight: 600;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
        font-size: 0.9rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .page-header h1 {
        font-size: 2.2rem;
    }
}

@media (max-width: 480px) {
    .nav-brand h1 {
        font-size: 1.2rem;
    }
    
    .hero {
        padding: 5rem 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}