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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', -apple-system, BlinkMacSystemFont, sans-serif;
    color: #333;
    line-height: 1.6;
    background: #fff;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #1a73e8, #0d47a1);
    color: #fff;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #1565c0, #0d47a1);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(26, 115, 232, 0.3);
}

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

.btn-secondary:hover {
    background: #fff;
    color: #1a73e8;
}

/* 顶部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: #fff;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo h1 {
    font-size: 24px;
    color: #1a73e8;
    font-weight: bold;
}

.nav ul {
    display: flex;
    gap: 40px;
}

.nav a {
    font-size: 16px;
    color: #333;
    padding: 8px 0;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #1a73e8;
    transition: width 0.3s ease;
}

.nav a:hover,
.nav a.active {
    color: #1a73e8;
}

.nav a:hover::after,
.nav a.active::after {
    width: 100%;
}

/* Hero Banner */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, #1a237e 0%, #0d47a1 50%, #1565c0 100%);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 120px 20px 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="0.5"/></svg>');
    background-size: 100px 100px;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero h2 {
    font-size: 52px;
    color: #fff;
    margin-bottom: 24px;
    font-weight: bold;
    letter-spacing: 2px;
}

.hero p {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    line-height: 1.8;
}

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

.hero-stats {
    display: flex;
    gap: 60px;
    margin-top: 80px;
    position: relative;
    z-index: 1;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 48px;
    font-weight: bold;
    color: #fff;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.8);
}

/* Section 通用样式 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 36px;
    color: #1a237e;
    margin-bottom: 8px;
    font-weight: bold;
}

.section-header p {
    font-size: 14px;
    color: #999;
    letter-spacing: 4px;
}

/* 关于我们 */
.about {
    padding: 100px 0;
    background: #f8f9fa;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: 28px;
    color: #1a237e;
    margin-bottom: 20px;
}

.about-text p {
    font-size: 16px;
    color: #666;
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 30px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: #333;
}

.feature i {
    color: #1a73e8;
    font-size: 18px;
}

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

.image-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 16px;
    color: #1565c0;
}

.image-placeholder i {
    font-size: 80px;
    opacity: 0.6;
}

.image-placeholder span {
    font-size: 18px;
    opacity: 0.8;
}

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

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

.service-card {
    background: #fff;
    border: 1px solid #eee;
    border-radius: 12px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-color: transparent;
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 24px;
    transition: all 0.3s ease;
}

.service-icon i {
    font-size: 32px;
    color: #1565c0;
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, #1a73e8, #0d47a1);
}

.service-card:hover .service-icon i {
    color: #fff;
}

.service-card h3 {
    font-size: 20px;
    color: #333;
    margin-bottom: 12px;
}

.service-card p {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
}

/* 产品中心 */
.products {
    padding: 100px 0;
    background: #f8f9fa;
}

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

.product-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

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

.product-image {
    height: 200px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image.img-1 { background: linear-gradient(135deg, #FF9A56, #FF6B6B); }
.product-image.img-2 { background: linear-gradient(135deg, #667eea, #764ba2); }
.product-image.img-3 { background: linear-gradient(135deg, #FF4757, #FF6B81); }
.product-image.img-4 { background: linear-gradient(135deg, #4facfe, #00f2fe); }
.product-image.img-5 { background: linear-gradient(135deg, #f093fb, #f5576c); }
.product-image.img-6 { background: linear-gradient(135deg, #7B68EE, #9370DB); }

.product-tag {
    position: absolute;
    top: 16px;
    left: 16px;
    background: rgba(0, 0, 0, 0.3);
    color: #fff;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.product-tag.hot {
    background: #ff4757;
}

.product-tag.new {
    background: #2ed573;
}

.product-info {
    padding: 24px;
}

.product-info h3 {
    font-size: 18px;
    color: #333;
    margin-bottom: 12px;
    line-height: 1.4;
}

.product-info p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 16px;
}

.product-meta {
    display: flex;
    gap: 20px;
    font-size: 13px;
    color: #999;
}

.product-meta i {
    margin-right: 6px;
    color: #1a73e8;
}

/* 核心优势 */
.advantages {
    padding: 100px 0;
    background: linear-gradient(135deg, #1a237e 0%, #0d47a1 100%);
}

.advantages .section-header h2 {
    color: #fff;
}

.advantages .section-header p {
    color: rgba(255, 255, 255, 0.6);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.advantage-card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 40px 30px;
    text-align: center;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.advantage-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.advantage-number {
    font-size: 48px;
    font-weight: bold;
    color: rgba(255, 255, 255, 0.3);
    margin-bottom: 20px;
}

.advantage-card h3 {
    font-size: 20px;
    color: #fff;
    margin-bottom: 12px;
}

.advantage-card p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

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

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

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-item i {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
    color: #1565c0;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 16px;
    color: #333;
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 15px;
    color: #666;
}

.contact-form h3 {
    font-size: 24px;
    color: #333;
    margin-bottom: 24px;
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 15px;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #1a73e8;
}

.contact-form textarea {
    resize: vertical;
}

.contact-form .btn {
    align-self: flex-start;
    margin-top: 8px;
}

/* 页脚 */
.footer {
    background: #1a1a2e;
    color: #fff;
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-info h3 {
    font-size: 24px;
    margin-bottom: 12px;
}

.footer-info p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 18px;
    transition: all 0.3s ease;
}

.footer-social a:hover {
    background: #1a73e8;
}

.footer-links h4 {
    font-size: 18px;
    margin-bottom: 20px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

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

.footer-bottom {
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 8px;
}

.footer-bottom .icp a {
    color: #1a73e8;
    transition: color 0.3s ease;
}

.footer-bottom .icp a:hover {
    color: #4fc3f7;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .services-grid,
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        height: auto;
        padding: 16px 20px;
    }
    
    .nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
        margin-top: 16px;
    }
    
    .hero h2 {
        font-size: 32px;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 30px;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .services-grid,
    .products-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.service-card,
.product-card,
.advantage-card {
    animation: fadeInUp 0.6s ease forwards;
}