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

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

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

header {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: #fff;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    color: #fff;
}

.nav-links {
    display: flex;
    list-style: none;
}

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

.nav-links a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #ffd700;
}

.active {
    color: #ffd700 !important;
}

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

.hero {
    background: url('upload/hero-bg.jpg') no-repeat center center;
    background-size: cover;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #fff;
    margin-top: 0;
    padding-top: 60px;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.85) 0%, rgba(118, 75, 162, 0.85) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
    background: rgba(0, 0, 0, 0.3);
    padding: 20px 40px;
    border-radius: 10px;
    backdrop-filter: blur(5px);
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease 0.2s;
    animation-fill-mode: both;
    background: rgba(0, 0, 0, 0.25);
    padding: 15px 30px;
    border-radius: 8px;
    backdrop-filter: blur(5px);
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: #ffd700;
    color: #1e3c72;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: all 0.3s ease;
    animation: fadeInUp 1s ease 0.4s;
    animation-fill-mode: both;
}

.btn:hover {
    background: #fff;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.services {
    padding: 5rem 0;
    background: #f8f9fa;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1e3c72;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.service-card i {
    font-size: 3rem;
    color: #1e3c72;
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1e3c72;
}

.news {
    padding: 5rem 0;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

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

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

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

.news-info {
    padding: 1.5rem;
}

.news-info .date {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.news-info h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #1e3c72;
}

.news-info p {
    margin-bottom: 1rem;
    color: #666;
}

.products {
    padding: 5rem 0;
    background: #f8f9fa;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

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

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

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

.product-info {
    padding: 1.5rem;
}

.product-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: #1e3c72;
}

.product-info .price {
    color: #764ba2;
    font-weight: bold;
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.about {
    padding: 5rem 0;
}

.about-section {
    margin-bottom: 3rem;
}

.about-section h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: #1e3c72;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.value-card {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.value-card h3 {
    color: #1e3c72;
    margin-bottom: 0.5rem;
}

.timeline {
    position: relative;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: #1e3c72;
}

.timeline-item {
    margin-bottom: 2rem;
    position: relative;
}

.timeline-item.left {
    padding-right: 50%;
    text-align: right;
}

.timeline-item.right {
    padding-left: 50%;
}

.timeline-content {
    background: #fff;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-style: solid;
}

.timeline-item.left .timeline-content::before {
    right: -15px;
    border-width: 10px 0 10px 15px;
    border-color: transparent transparent transparent #fff;
}

.timeline-item.right .timeline-content::before {
    left: -15px;
    border-width: 10px 15px 10px 0;
    border-color: transparent #fff transparent transparent;
}

.timeline-content .year {
    font-weight: bold;
    color: #1e3c72;
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.contact {
    padding: 5rem 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-card {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.contact-card i {
    font-size: 3rem;
    color: #1e3c72;
    margin-bottom: 1rem;
}

.contact-card h3 {
    color: #1e3c72;
    margin-bottom: 0.5rem;
}

/* 联系页面样式 */
.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-item {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-5px);
}

.contact-item i {
    font-size: 2.5rem;
    color: #1e3c72;
    margin-bottom: 1rem;
}

.contact-item h3 {
    color: #1e3c72;
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.contact-item p {
    color: #666;
    margin-bottom: 0.3rem;
}

.contact-form {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 0 auto;
}

.contact-form h2 {
    color: #1e3c72;
    margin-bottom: 1.5rem;
    text-align: center;
}

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

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form button {
    padding: 12px 30px;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: #fff;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.contact-form button:hover {
    background: linear-gradient(135deg, #2a5298 0%, #1e3c72 100%);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #1e3c72;
    font-weight: bold;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

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

footer {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: #fff;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
}

.footer-section p {
    margin-bottom: 0.5rem;
}

.footer-section i {
    margin-right: 0.5rem;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

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

.footer-section ul li a:hover {
    color: #ffd700;
}

.footer-bottom {
    text-align: center;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.page-content {
    padding-top: 100px;
    min-height: 80vh;
}

.page-title {
    font-size: 2.5rem;
    color: #1e3c72;
    margin-bottom: 2rem;
    text-align: center;
}

.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.scroll-to-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    background: linear-gradient(135deg, #2a5298 0%, #1e3c72 100%);
    transform: translateY(-3px);
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 2rem 0;
    }

    .nav-links.active {
        left: 0;
    }

    .nav-links li {
        margin: 1rem 0;
    }

    .hamburger {
        display: block;
    }

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

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

    .timeline::before {
        left: 20px;
    }

    .timeline-item.left,
    .timeline-item.right {
        padding-left: 50px;
        padding-right: 0;
        text-align: left;
    }

    .timeline-item.left .timeline-content::before,
    .timeline-item.right .timeline-content::before {
        left: -15px;
        right: auto;
        border-width: 10px 15px 10px 0;
        border-color: transparent #fff transparent transparent;
    }
}