/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Roboto', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8fafc;
    overflow-x: hidden;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    outline: none;
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2563eb, #1e40af);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #3b82f6;
    border: 2px solid #3b82f6;
}

.btn-secondary:hover {
    background: rgba(59, 130, 246, 0.1);
    transform: translateY(-2px);
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 15px 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-size: 18px;
    font-weight: 700;
    color: #1e293b;
}

.logo-subtitle {
    font-size: 12px;
    color: #64748b;
    font-weight: 500;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: #475569;
    font-weight: 500;
    font-size: 16px;
    padding: 8px 0;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: #3b82f6;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6);
    border-radius: 2px;
}

.mobile-menu-btn {
    display: none;
    font-size: 24px;
    color: #475569;
    cursor: pointer;
}

/* 首页 */
.hero {
    padding: 180px 0 100px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    color: #1e293b;
    margin-bottom: 20px;
}

.highlight {
    background: linear-gradient(90deg, #3b82f6, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: #64748b;
    margin-bottom: 20px;
    font-weight: 500;
}

.hero-description {
    font-size: 16px;
    color: #475569;
    margin-bottom: 30px;
    max-width: 600px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-top: 30px;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-circle {
    position: relative;
    width: 400px;
    height: 400px;
}

.circle-inner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 60px;
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.3);
    z-index: 2;
}

.circle-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    border: 2px solid rgba(59, 130, 246, 0.2);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

.ring-2 {
    width: 350px;
    height: 350px;
    border-color: rgba(139, 92, 246, 0.15);
    animation: rotate 25s linear infinite reverse;
}

.ring-3 {
    width: 400px;
    height: 400px;
    border-color: rgba(59, 130, 246, 0.1);
    animation: rotate 30s linear infinite;
}

@keyframes rotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* 通用部分样式 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 10px;
}

.section-subtitle {
    font-size: 18px;
    color: #64748b;
    font-weight: 500;
}

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

.about-content {
    display: flex;
    gap: 60px;
    align-items: center;
}

.about-text {
    flex: 1;
}

.about-text h3 {
    font-size: 28px;
    color: #1e293b;
    margin-bottom: 20px;
    font-weight: 700;
}

.about-text p {
    color: #475569;
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.feature {
    text-align: center;
    padding: 25px;
    background: #f8fafc;
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.feature i {
    font-size: 32px;
    color: #3b82f6;
    margin-bottom: 15px;
}

.feature h4 {
    font-size: 18px;
    color: #1e293b;
    margin-bottom: 10px;
    font-weight: 600;
}

.feature p {
    font-size: 14px;
    color: #64748b;
    line-height: 1.6;
}

.about-stats {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.stat-card {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    padding: 30px;
    border-radius: 16px;
    text-align: center;
    color: white;
    box-shadow: 0 10px 25px rgba(59, 130, 246, 0.2);
}

.stat-number {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 16px;
    font-weight: 500;
    opacity: 0.9;
}

/* 产品服务 */
.services {
    padding: 100px 0;
    background: #f8fafc;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background: white;
    padding: 35px;
    border-radius: 16px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e2e8f0;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    margin-bottom: 25px;
}

.service-card h3 {
    font-size: 22px;
    color: #1e293b;
    margin-bottom: 15px;
    font-weight: 700;
}

.service-card p {
    color: #64748b;
    margin-bottom: 20px;
    line-height: 1.7;
}

.service-list {
    list-style: none;
    padding-left: 0;
}

.service-list li {
    color: #475569;
    padding: 8px 0;
    border-bottom: 1px solid #f1f5f9;
    position: relative;
    padding-left: 20px;
}

.service-list li:last-child {
    border-bottom: none;
}

.service-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #3b82f6;
    font-weight: bold;
}

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

.contact-content {
    display: flex;
    gap: 60px;
}

.contact-info {
    flex: 1;
}

.info-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 25px;
    background: #f8fafc;
    border-radius: 12px;
    margin-bottom: 20px;
    transition: transform 0.3s ease;
}

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

.info-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

.info-text h4 {
    font-size: 18px;
    color: #1e293b;
    margin-bottom: 5px;
    font-weight: 600;
}

.info-text p {
    color: #64748b;
    font-size: 15px;
}

.contact-form {
    flex: 1;
    background: #f8fafc;
    padding: 40px;
    border-radius: 16px;
}

.contact-form h3 {
    font-size: 24px;
    color: #1e293b;
    margin-bottom: 30px;
    font-weight: 700;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s ease;
    background: white;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3b82f6;
}

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

/* 页脚 */
.footer {
    background: linear-gradient(135deg, #1e293b, #0f172a);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 50px;
    margin-bottom: 40px;
}

.footer-logo .logo {
    margin-bottom: 20px;
}

.footer-logo .logo-icon {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
}

.footer-logo .logo-title {
    color: white;
}

.footer-logo .logo-subtitle {
    color: #cbd5e1;
}

.footer-description {
    color: #94a3b8;
    line-height: 1.7;
    font-size: 15px;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 18px;
    margin-bottom: 20px;
    font-weight: 600;
    color: white;
}

.footer-links ul {
    list-style: none;
    padding-left: 0;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #3b82f6;
}

.footer-contact p {
    color: #94a3b8;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-contact i {
    color: #3b82f6;
    width: 20px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #334155;
    color: #94a3b8;
    font-size: 14px;
}

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

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .contact-content {
        flex-direction: column;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tech-circle {
        width: 300px;
        height: 300px;
    }
    
    .circle-inner {
        width: 150px;
        height: 150px;
        font-size: 45px;
    }
    
    .circle-ring {
        width: 225px;
        height: 225px;
    }
    
    .ring-2 {
        width: 262px;
        height: 262px;
    }
    
    .ring-3 {
        width: 300px;
        height: 300px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        padding: 150px 0 80px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: