/* 全局样式 */
:root {
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --accent-color: #e74c3c;
    --dark-color: #333;
    --light-color: #f4f4f4;
    --success-color: #2ecc71;
    --medium-color: #777;
    --font-family: 'Helvetica Neue', Arial, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #fff;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

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

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.section-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 40px;
    color: var(--dark-color);
    position: relative;
}

.section-title:after {
    content: '';
    display: block;
    width: 80px;
    height: 3px;
    background: var(--primary-color);
    margin: 10px auto;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    text-align: center;
}

.btn:hover {
    background: var(--secondary-color);
    color: #fff;
}

.btn-large {
    padding: 14px 28px;
    font-size: 1.1rem;
}

/* 头部样式 */
header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 15px;
}

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

nav ul {
    display: flex;
}

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

nav ul li a {
    color: var(--dark-color);
    font-weight: 500;
    padding-bottom: 5px;
    position: relative;
}

nav ul li a:hover, nav ul li a.active {
    color: var(--primary-color);
}

nav ul li a.active:after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 2px;
    background: var(--primary-color);
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* 英雄区域样式 */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('../images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    color: #fff;
    padding: 100px 0;
    text-align: center;
}

.hero-content h2 {
    font-size: 2.8rem;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 特性区域样式 */
.features {
    padding: 80px 0;
    background-color: var(--light-color);
}

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

.feature-card {
    background: #fff;
    padding: 30px;
    border-radius: 5px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

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

.feature-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
}

/* 关于我们预览区域样式 */
.about-preview {
    padding: 80px 0;
}

.about-preview .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.about-content h2 {
    text-align: left;
}

.about-content h2:after {
    margin-left: 0;
}

.about-content p {
    margin-bottom: 25px;
}

.about-image {
    border-radius: 5px;
    overflow: hidden;
}

/* 页面头部样式 */
.page-header {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('../images/page-header-bg.jpg');
    background-size: cover;
    background-position: center;
    color: #fff;
    padding: 50px 0;
    text-align: center;
}

.page-header h2 {
    font-size: 2.5rem;
}

/* 关于我们页面样式 */
.about-section {
    padding: 80px 0;
}

.about-section .container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    align-items: center;
}

.mission-vision {
    background-color: var(--light-color);
    padding: 80px 0;
}

.mission-vision .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.mission, .vision {
    background: #fff;
    padding: 30px;
    border-radius: 5px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

.mission h3, .vision h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.team-section {
    padding: 80px 0;
}

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

.team-member {
    text-align: center;
}

.member-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 20px;
    border: 5px solid var(--light-color);
}

.team-member h3 {
    font-size: 1.4rem;
    margin-bottom: 5px;
}

.team-member p {
    color: var(--medium-color);
}

/* 服务页面样式 */
.services-section, .products-section {
    padding: 80px 0;
}

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

.service-card {
    background: #fff;
    padding: 30px;
    border-radius: 5px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.service-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
}

.service-card p {
    margin-bottom: 20px;
}

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

.product-card {
    background: #fff;
    border-radius: 5px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.product-info {
    padding: 20px;
}

.product-info h3 {
    font-size: 1.4rem;
    margin-bottom: 10px;
}

.product-info p {
    margin-bottom: 20px;
}

.cta-section {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('../images/cta-bg.jpg');
    background-size: cover;
    background-position: center;
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

.cta-section h2 {
    font-size: 2.2rem;
    margin-bottom: 15px;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 联系页面样式 */
.contact-section {
    padding: 80px 0;
}

.contact-section .container {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
}

.info-item {
    display: flex;
    margin-bottom: 25px;
}

.info-item i {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-right: 20px;
    width: 40px;
    text-align: center;
}

.info-item h4 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.info-item p {
    color: var(--medium-color);
}

.contact-form h3, .contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 25px;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
}

.form-group textarea {
    resize: vertical;
}

.btn-submit {
    width: 100%;
    font-size: 1.1rem;
}

.map-section {
    padding: 40px 0 80px;
}

.map-container {
    height: 400px;
    border-radius: 5px;
    overflow: hidden;
}

.map-placeholder {
    height: 100%;
    background-color: #eee;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 页脚样式 */
footer {
    background-color: var(--dark-color);
    color: #fff;
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    padding-bottom: 40px;
}

.footer-section h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-section h3:after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 2px;
    background: var(--primary-color);
}

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

.footer-section ul li a {
    color: #ddd;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

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

.footer-section p i {
    margin-right: 10px;
    color: var(--primary-color);
}

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

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    margin-right: 10px;
    color: #fff;
    transition: all 0.3s ease;
}

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

.footer-bottom {
    background: rgba(0, 0, 0, 0.2);
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    margin: 0;
}

.footer-bottom a {
    color: #ddd;
}

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

/* 响应式样式 */
@media (max-width: 992px) {
    .about-preview .container,
    .about-section .container,
    .contact-section .container {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        order: -1;
    }
    
    .menu-toggle {
        display: block;
    }
    
    nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: all 0.3s ease;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    }
    
    nav.active {
        max-height: 300px;
    }
    
    nav ul {
        flex-direction: column;
        padding: 0;
    }
    
    nav ul li {
        margin: 0;
    }
    
    nav ul li a {
        display: block;
        padding: 15px;
        border-bottom: 1px solid #f4f4f4;
    }
}

@media (max-width: 768px) {
    .mission-vision .container {
        grid-template-columns: 1fr;
    }
    
    .hero-content h2 {
        font-size: 2.2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
}

@media (max-width: 576px) {
    .container {
        width: 95%;
    }
    
    .hero {
        padding: 70px 0;
    }
    
    .hero-content h2 {
        font-size: 1.8rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
}