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

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

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

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

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo .logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2563eb;
    text-decoration: none;
}

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

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: #2563eb;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 主页横幅 */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

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

.btn {
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
}

.btn-primary {
    background: #2563eb;
    color: white;
}

.btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: white;
    color: #2563eb;
}

.hero-placeholder {
    background: rgba(255, 255, 255, 0.1);
    border: 2px dashed rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    padding: 60px 40px;
    text-align: center;
    color: white;
    backdrop-filter: blur(10px);
}

.hero-placeholder i {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.8;
}

.hero-placeholder h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.hero-placeholder p {
    font-size: 1rem;
    opacity: 0.8;
}

/* 解决方案 */
.solutions {
    padding: 80px 0;
    background: #f8fafc;
}

.solutions h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #1e293b;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.solution-card {
    background: white;
    padding: 40px 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.solution-card:hover {
    transform: translateY(-10px);
}

.solution-card i {
    font-size: 3rem;
    color: #2563eb;
    margin-bottom: 20px;
}

.solution-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #1e293b;
}

.solution-card p {
    color: #64748b;
    line-height: 1.6;
}

/* 产品功能 */
.products {
    padding: 80px 0;
}

.products h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #1e293b;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.product-feature {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.feature-icon {
    background: #2563eb;
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.feature-content h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: #1e293b;
}

.feature-content p {
    color: #64748b;
    line-height: 1.6;
}

/* 客户案例 */
.cases {
    padding: 80px 0;
    background: #f8fafc;
}

.cases h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #1e293b;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.case-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.case-card:hover {
    transform: translateY(-5px);
}

.case-placeholder {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
}

.case-placeholder i {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.9;
}

.case-placeholder span {
    font-size: 1.2rem;
    font-weight: 600;
}

.case-content {
    padding: 30px;
}

.case-content h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #1e293b;
}

.case-content p {
    color: #64748b;
    line-height: 1.6;
}

/* 接口文档 */
.docs {
    padding: 80px 0;
}

.docs h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #1e293b;
}

.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.doc-card {
    background: white;
    padding: 40px 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 2px solid transparent;
    transition: all 0.3s;
}

.doc-card:hover {
    border-color: #2563eb;
    transform: translateY(-5px);
}

.doc-card i {
    font-size: 3rem;
    color: #2563eb;
    margin-bottom: 20px;
}

.doc-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #1e293b;
}

.doc-card p {
    color: #64748b;
    margin-bottom: 25px;
    line-height: 1.6;
}

.btn-outline {
    background: transparent;
    color: #2563eb;
    border: 2px solid #2563eb;
}

.btn-outline:hover {
    background: #2563eb;
    color: white;
}

.advantage-list {
    list-style: none;
    text-align: left;
    margin-top: 15px;
}

.advantage-list li {
    padding: 5px 0;
    color: #64748b;
    position: relative;
    padding-left: 20px;
}

.advantage-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #2563eb;
    font-weight: bold;
}

/* 联系我们 */
.contact {
    padding: 80px 0;
    background: #f8fafc;
}

.contact h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #1e293b;
}

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

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

.contact-item i {
    background: #2563eb;
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-item h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
    color: #1e293b;
}

.contact-item p {
    color: #64748b;
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form input,
.contact-form textarea {
    padding: 15px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #2563eb;
}

/* 页脚 */
.footer {
    background: #1e293b;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: #f1f5f9;
}

.footer-section p {
    color: #94a3b8;
    margin-bottom: 10px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: #2563eb;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 20px;
    text-align: center;
    color: #94a3b8;
}

.footer-links {
    margin-bottom: 15px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.footer-links a {
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #2563eb;
}

.footer-links .separator {
    color: #64748b;
    font-size: 0.8rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .solutions h2,
    .products h2,
    .cases h2,
    .docs h2,
    .contact h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}