/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #34495e;
    --text-color: #333;
    --white: #ffffff;
    --gray: #f5f5f5;
}

body {
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

p {
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

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

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #2980b9;
    color: var(--white);
}

/* 导航栏样式 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.logo h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin: 0;
}

.nav-links {
    display: flex;
}

.nav-links li {
    margin-left: 2rem;
}

.nav-links a {
    font-weight: 500;
    color: var(--secondary-color);
}

.nav-links a:hover {
    color: var(--primary-color);
}

.burger {
    display: none;
    cursor: pointer;
}

.burger div {
    width: 25px;
    height: 3px;
    background-color: var(--secondary-color);
    margin: 5px;
    transition: all 0.3s ease;
}

/* 英雄区样式 */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8rem 2rem 4rem;
    background-color: var(--gray);
    margin-top: 70px;
}

.hero-content {
    max-width: 50%;
}

.hero-content h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.hero-content p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: var(--dark-color);
}

.cta-btn {
    padding: 1rem 2rem;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.cta-btn:hover {
    background-color: #2980b9;
}

.hero-image {
    max-width: 45%;
}

.hero-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* 关于我们样式 */
.about {
    padding: 5rem 2rem;
    background-color: var(--white);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.about-stats {
    display: flex;
    justify-content: space-around;
    margin-top: 3rem;
}

.stat {
    text-align: center;
    padding: 1.5rem;
    background-color: var(--gray);
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    flex: 1;
    margin: 0 1rem;
}

.stat i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.stat h3 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

/* 服务样式 */
.services {
    padding: 5rem 2rem;
    background-color: var(--gray);
    text-align: center;
}

.services h2 {
    font-size: 2rem;
    margin-bottom: 3rem;
}

.services-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
}

.service-card {
    background-color: var(--white);
    border-radius: 8px;
    padding: 2rem;
    width: 280px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.service-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

/* 产品样式 */
.products {
    padding: 5rem 2rem;
    background-color: var(--white);
    text-align: center;
}

.products h2 {
    font-size: 2rem;
    margin-bottom: 3rem;
}

.products-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
}

.product-card {
    width: 350px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

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

.product-card h3 {
    padding: 1rem;
    margin: 0;
}

.product-card p {
    padding: 0 1rem 1.5rem;
    margin: 0;
}

/* 联系我们样式 */
.contact {
    padding: 5rem 2rem;
    background-color: var(--gray);
    text-align: center;
}

.contact h2 {
    font-size: 2rem;
    margin-bottom: 3rem;
}

.contact-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    flex: 1;
    min-width: 300px;
    text-align: left;
}

.info-item {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-right: 1rem;
    width: 30px;
}

.contact-form {
    flex: 1;
    min-width: 300px;
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-form input,
.contact-form textarea {
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

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

.contact-form button {
    padding: 0.8rem 1.5rem;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    align-self: flex-start;
}

.contact-form button:hover {
    background-color: #2980b9;
}

/* 页脚样式 */
footer {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 3rem 2rem;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-logo,
.footer-links,
.footer-social {
    flex: 1;
    min-width: 200px;
}

.footer-logo h2 {
    color: var(--white);
    margin-bottom: 1rem;
}

.footer-links h3,
.footer-social h3 {
    color: var(--white);
    margin-bottom: 1.5rem;
}

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

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: var(--light-color);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-social a {
    display: inline-block;
    margin-right: 1rem;
    font-size: 1.5rem;
    color: var(--light-color);
}

.footer-social a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 响应式样式 */
@media screen and (max-width: 768px) {
    .nav-links {
        position: absolute;
        right: 0px;
        height: 92vh;
        top: 8vh;
        background-color: var(--white);
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 50%;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
        box-shadow: -5px 0 10px rgba(0, 0, 0, 0.1);
    }

    .nav-links li {
        opacity: 0;
        margin: 1.5rem 0;
    }

    .burger {
        display: block;
    }

    .hero {
        flex-direction: column;
        text-align: center;
        padding: 6rem 2rem 3rem;
    }

    .hero-content,
    .hero-image {
        max-width: 100%;
    }

    .hero-image {
        margin-top: 2rem;
    }

    .about-stats {
        flex-direction: column;
        gap: 1rem;
    }
}

@media screen and (max-width: 480px) {
    .navbar {
        padding: 1rem;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .service-card,
    .product-card {
        width: 100%;
    }
}

/* 动画效果 */
@keyframes navLinkFade {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toggle .line1 {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.toggle .line2 {
    opacity: 0;
}

.toggle .line3 {
    transform: rotate(45deg) translate(-5px, -6px);
}

.nav-active {
    transform: translateX(0%);
}