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

html {
    scroll-behavior: smooth;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: #333;
}

ul {
    list-style: none;
}

.btn {
    display: inline-block;
    background: #ff6b35;
    color: #fff;
    padding: 12px 25px;
    border-radius: 5px;
    transition: background 0.3s;
    cursor: pointer;
    border: none;
    font-size: 16px;
}

.btn:hover {
    background: #e55a2e;
}

.btn-sm {
    padding: 8px 15px;
    font-size: 14px;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #1a365d;
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: #ff6b35;
}

/* 导航栏 */
header {
    background-color: #1a365d;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}

.logo h1 {
    font-size: 24px;
    color: #ff6b35;
}

nav ul {
    display: flex;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    font-size: 16px;
    font-weight: 500;
    transition: color 0.3s;
    color: #fff;
}

nav ul li a:hover, nav ul li a.active {
    color: #ff6b35;
}

/* 首页横幅 */
.hero {
    background: linear-gradient(135deg, #1a365d 0%, #2d5a87 100%);
    color: #fff;
    padding: 150px 0;
    text-align: center;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* 公司简介 */
.about {
    padding: 100px 0;
    background-color: #f7fafc;
}

.about-content {
    display: flex;
    gap: 50px;
    align-items: center;
}

.about-image {
    flex: 1;
}

.about-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.about-text {
    flex: 1;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: #4a5568;
}

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

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

.product-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.product-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.product-info {
    padding: 20px;
}

.product-info h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: #1a365d;
}

.product-info p {
    color: #4a5568;
    margin-bottom: 15px;
}

.features {
    margin-bottom: 20px;
}

.features li {
    margin-bottom: 8px;
    color: #4a5568;
}

.features i {
    color: #ff6b35;
    margin-right: 10px;
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background-color: #f7fafc;
}

.contact-container {
    display: flex;
    gap: 50px;
}

.contact-info, .contact-form {
    flex: 1;
}

.info-item {
    display: flex;
    margin-bottom: 30px;
}

.info-item i {
    font-size: 24px;
    color: #ff6b35;
    margin-right: 20px;
    margin-top: 5px;
}

.info-item h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
    color: #1a365d;
}

.info-item p {
    color: #4a5568;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #1a365d;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #e2e8f0;
    border-radius: 5px;
    font-size: 16px;
    font-family: inherit;
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: #ff6b35;
}

/* 页脚 */
footer {
    background-color: #1a365d;
    color: #fff;
    padding: 60px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.footer-logo, .footer-links, .footer-social {
    margin-bottom: 30px;
}

.footer-logo h2 {
    font-size: 24px;
    margin-bottom: 10px;
    color: #ff6b35;
}

.footer-links h3, .footer-social h3 {
    font-size: 18px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-links h3::after, .footer-social h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: #ff6b35;
}

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

.footer-links ul li a {
    color: #cbd5e0;
    transition: color 0.3s;
}

.footer-links ul li a:hover {
    color: #ff6b35;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    color: #fff;
    background: rgba(255, 107, 53, 0.2);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;
}

.social-icons a:hover {
    background: #ff6b35;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #cbd5e0;
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .about-content {
        flex-direction: column;
    }
    
    .contact-container {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    nav ul {
        display: none;
    }
    
    .hero-content h2 {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .footer-content {
        flex-direction: column;
    }
}

/* 产品中心文字描述样式 */
.product-description {
    max-width: 900px;
    margin: 0 auto;
    text-align: left;
}

.product-description h3 {
    font-size: 1.8rem;
    color: #1a365d;
    margin-bottom: 20px;
    text-align: center;
}

.product-description > p {
    font-size: 1.1rem;
    color: #4a5568;
    margin-bottom: 30px;
    text-align: center;
}

.product-item {
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid #e2e8f0;
}

.product-item:last-child {
    border-bottom: none;
}

.product-item h4 {
    font-size: 1.5rem;
    color: #ff6b35;
    margin-bottom: 15px;
}

.product-item p {
    font-size: 1.1rem;
    line-height: 1.6;
    color: #4a5568;
}

/* 隐私政策 */
.privacy {
    padding: 100px 0;
    background-color: #fff;
}

.privacy-content {
    max-width: 900px;
    margin: 0 auto;
}

.privacy-section {
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid #e2e8f0;
}

.privacy-section:last-child {
    border-bottom: none;
}

.privacy-section h3 {
    font-size: 1.4rem;
    color: #1a365d;
    margin-bottom: 15px;
}

.privacy-section p {
    font-size: 1rem;
    line-height: 1.6;
    color: #4a5568;
    margin-bottom: 15px;
}

.privacy-section ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.privacy-section ul li {
    font-size: 1rem;
    line-height: 1.6;
    color: #4a5568;
    margin-bottom: 8px;
    position: relative;
}

.privacy-section ul li::before {
    content: "•";
    color: #ff6b35;
    font-weight: bold;
    position: absolute;
    left: -15px;
}