/* 全局样式 */
:root {
    --primary-color: #4e73df;
    --secondary-color: #1cc88a;
    --dark-color: #333;
    --light-color: #f8f9fc;
    --danger-color: #e74a3b;
    --gray-color: #858796;
    --transition: all 0.3s ease;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--light-color);
}

a {
    text-decoration: none;
    color: var(--dark-color);
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 10px 25px;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.btn:hover {
    background-color: #3a5ec9;
    transform: translateY(-3px);
    box-shadow: var(--box-shadow);
}

section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--dark-color);
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 10px auto 0;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--gray-color);
}

/* 导航栏样式 */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: white;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

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

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

.logo h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

nav ul {
    display: flex;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

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

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

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

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

/* 首页轮播banner样式 */
.hero {
    height: 100vh;
    background-color: #f5f5f5;
    position: relative;
    overflow: hidden;
    margin-top: 70px;
}

.hero-slider {
    width: 100%;
    height: 100%;
    position: relative;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    opacity: 0;
    transition: opacity 1s ease;
}

.slide:nth-child(1) {
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('./images/hero1.jpg');
}

.slide:nth-child(2) {
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('./images/hero2.jpg');
}

.slide.active {
    opacity: 1;
}

.slide .container {
    color: white;
    text-align: center;
}

.slide h2 {
    font-size: 3rem;
    margin-bottom: 20px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s forwards 0.5s;
}

.slide p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s forwards 0.8s;
}

.slide .btn {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s forwards 1.1s;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slider-controls {
    position: absolute;
    bottom: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 30px;
}

.slider-controls button {
    background-color: rgba(255, 255, 255, 0.3);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    transition: var(--transition);
}

.slider-controls button:hover {
    background-color: var(--primary-color);
}

/* 关于我们部分样式 */
.about {
    background-color: white;
}

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

.about-img {
    flex: 1;
}

.about-img img {
    border-radius: 10px;
    box-shadow: var(--box-shadow);
}

.about-text {
    flex: 1;
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.about-text p {
    margin-bottom: 20px;
    color: var(--gray-color);
}

.company-stats {
    display: flex;
    justify-content: space-between;
    margin-top: 40px;
    text-align: center;
}

.stat-item {
    flex: 1;
}

.stat-item h4 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-item p {
    color: var(--gray-color);
    margin: 0;
}

/* 服务内容部分样式 */
.services {
    background-color: #f9f9f9;
}

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

.service-card {
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.service-card .icon {
    margin-bottom: 20px;
    width: 70px;
    height: 70px;
    background-color: rgba(78, 115, 223, 0.1);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 1.8rem;
    margin: 0 auto 20px;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.service-card p {
    color: var(--gray-color);
}

/* 产品展示部分样式 */
.products {
    background-color: white;
}

.product-filter {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.filter-btn {
    background: none;
    border: none;
    padding: 8px 20px;
    margin: 5px;
    cursor: pointer;
    font-size: 1rem;
    border-radius: 30px;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--primary-color);
    color: white;
}

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

.product-item {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    background-color: white;
}

.product-item:hover {
    transform: translateY(-10px);
}

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

.product-info {
    padding: 30px;
    text-align: center;
}

.product-info h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.product-info p {
    color: var(--gray-color);
}

/* 联系我们部分样式 */
.contact {
    background-color: #f9f9f9;
}

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

.contact-info {
    flex: 1;
}

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

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-right: 15px;
    margin-top: 5px;
}

.info-item h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
    color: var(--dark-color);
}

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

.contact-form {
    flex: 1;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    outline: none;
}

.form-group textarea {
    height: 150px;
    resize: none;
}

/* 页脚部分样式 */
footer {
    background-color: #282d32;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 40px;
}

.footer-logo,
.footer-links,
.footer-social,
.footer-newsletter {
    flex: 1;
    min-width: 250px;
}

.footer-logo img {
    height: 40px;
    margin-bottom: 15px;
}

.footer-logo h2 {
    font-size: 1.5rem;
    color: white;
}

.footer-links h3,
.footer-social h3,
.footer-newsletter h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: white;
    position: relative;
}

.footer-links h3::after,
.footer-social h3::after,
.footer-newsletter h3::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--primary-color);
}

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

.footer-links ul li a {
    color: #ccc;
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: white;
    padding-left: 5px;
}

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

.social-icons a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
}

.social-icons a:hover {
    background-color: var(--primary-color);
    transform: translateY(-5px);
}

.footer-newsletter p {
    color: #ccc;
    margin-bottom: 15px;
}

.footer-newsletter form {
    display: flex;
    position: relative;
}

.footer-newsletter input {
    width: 100%;
    padding: 12px 15px;
    border-radius: 5px;
    border: none;
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
}

.footer-newsletter input::placeholder {
    color: #ccc;
}

.footer-newsletter button {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #ccc;
    font-size: 0.9rem;
}

.footer-policy {
    margin-top: 10px;
}

.footer-policy a {
    color: #ccc;
    transition: var(--transition);
}

.footer-policy a:hover {
    color: white;
}

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

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: white;
        padding: 20px 0;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
        transition: var(--transition);
    }
    
    nav.active {
        clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    nav ul li {
        margin: 10px 0;
    }
    
    .slide h2 {
        font-size: 2rem;
    }
    
    .slide p {
        font-size: 1rem;
    }
    
    .company-stats {
        flex-wrap: wrap;
    }
    
    .stat-item {
        flex: 0 0 50%;
        margin-bottom: 20px;
    }
}