/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* 头部样式 */
.header {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    padding: 1rem 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

.nav {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.nav a:hover,
.nav a.active {
    background-color: rgba(255,255,255,0.2);
}

/* 移动端菜单 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

/* 主要内容区域 */
.main-content {
    margin-top: 80px;
    min-height: calc(100vh - 160px);
}

/* 轮播图样式 */
.hero-slider {
    position: relative;
    height: 500px;
    overflow: hidden;
    margin-bottom: 3rem;
}

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

.slide.active {
    opacity: 1;
}

.slide-content {
    text-align: center;
    color: white;
    background: rgba(0,0,0,0.5);
    padding: 2rem;
    border-radius: 10px;
}

.slide-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.slide-content p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    transition: transform 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary {
    background: linear-gradient(135deg, #1e3c72, #2a5298);
}

/* 导航点 */
.slider-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    cursor: pointer;
    transition: background 0.3s ease;
}

.dot.active {
    background: white;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
    transition: transform 0.3s ease;
}

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

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

/* 网格布局 */
.grid {
    display: grid;
    gap: 2rem;
    margin-bottom: 3rem;
}

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

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* 产品卡片 */
.product-card {
    background: white;
    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(-5px);
}

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

.product-card-content {
    padding: 1.5rem;
}

.product-card h4 {
    color: #1e3c72;
    margin-bottom: 0.5rem;
}

/* 新闻卡片 */
.news-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
    margin-bottom: 2rem;
}

.news-card:hover {
    transform: translateY(-5px);
}

.news-card-content {
    padding: 1.5rem;
}

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

.news-card h4 {
    color: #1e3c72;
    margin-bottom: 1rem;
}

/* 表单样式 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #333;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 2px solid #e9ecef;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: #1e3c72;
}

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

/* 页面标题 */
.page-title {
    text-align: center;
    padding: 3rem 0;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    margin-bottom: 3rem;
}

.page-title h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.page-title p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 联系信息 */
.contact-info {
    background: #1e3c72;
    color: white;
    padding: 2rem;
    border-radius: 10px;
}

.contact-info h3 {
    margin-bottom: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.contact-item i {
    margin-right: 1rem;
    font-size: 1.2rem;
}

/* 底部样式 */
.footer {
    background: #1e3c72;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #1e3c72;
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }

    .nav.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero-slider {
        height: 300px;
    }

    .slide-content h2 {
        font-size: 1.8rem;
    }

    .slide-content p {
        font-size: 1rem;
    }

    .page-title h1 {
        font-size: 2rem;
    }

    .grid-3 {
        grid-template-columns: 1fr;
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .grid-4 {
        grid-template-columns: 1fr;
    }

    .hero-slider {
        height: 250px;
    }

    .slide-content {
        padding: 1rem;
    }

    .slide-content h2 {
        font-size: 1.5rem;
    }
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 1s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-up {
    animation: slideUp 0.6s ease-out;
}

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

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #1e3c72;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}