/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* 导航栏样式 */
.navbar {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s ease;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo {
    height: 40px;
    width: auto;
}

.brand-text {
    font-size: 16px;
    font-weight: 700;
    color: #2c3e50;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #3498db;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    transition: all 0.3s ease;
}

/* Banner区域样式 */
.banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 150px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.banner-content {
    position: relative;
    z-index: 2;
}

.banner-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.banner-subtitle {
    font-size: 1.5rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.banner-keywords {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.banner-keywords span {
    background: rgba(255,255,255,0.2);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    backdrop-filter: blur(10px);
}

.cta-button {
    display: inline-block;
    background: #e74c3c;
    color: white;
    padding: 15px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

.cta-button:hover {
    background: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.4);
}

.banner-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.water-drop {
    position: absolute;
    width: 3px;
    height: 3px;
    background: rgba(255,255,255,0.6);
    border-radius: 50%;
    animation: drop 3s infinite linear;
}

.water-drop:nth-child(1) {
    left: 20%;
    animation-delay: 0s;
}

.water-drop:nth-child(2) {
    left: 50%;
    animation-delay: 1s;
}

.water-drop:nth-child(3) {
    left: 80%;
    animation-delay: 2s;
}

@keyframes drop {
    0% {
        transform: translateY(-100px);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: translateY(100vh);
        opacity: 0;
    }
}

/* 通用区块样式 */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 60px;
    color: #2c3e50;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: #3498db;
    border-radius: 2px;
}

/* 公司介绍样式 */
.about-section {
    padding: 100px 0;
    background: #f8f9fa;
}

.about-content {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.about-text h3 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.about-text h4 {
    color: #3498db;
    margin: 30px 0 15px;
    font-size: 1.4rem;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.8;
}

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

.business-item {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 8px;
    border-left: 4px solid #3498db;
}

.business-item h5 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 1.2rem;
}

/* 产品展示样式 */
.products-section {
    padding: 100px 0;
}

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

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

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

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

.product-info {
    padding: 20px;
}

.product-name {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #2c3e50;
}

.product-description {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* 应用领域样式 */
.applications-section {
    padding: 100px 0;
    background: #f8f9fa;
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.application-item {
    background: white;
    padding: 30px 20px;
    text-align: center;
    border-radius: 8px;
    font-weight: 600;
    color: #2c3e50;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.application-item:hover {
    background: #3498db;
    color: white;
    transform: translateY(-2px);
}

/* FAQ样式 */
.faq-section {
    padding: 100px 0;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    margin-bottom: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    background: #f8f9fa;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1.1rem;
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 20px;
    max-height: 500px;
}

.faq-toggle {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

/* 友情链接样式 */
.links-section {
    padding: 60px 0;
    background: #f8f9fa;
    text-align: center;
}

.links-section h3 {
    margin-bottom: 30px;
    color: #2c3e50;
}

.links-grid {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.links-grid a {
    color: #3498db;
    text-decoration: none;
    padding: 8px 16px;
    border: 1px solid #3498db;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.links-grid a:hover {
    background: #3498db;
    color: white;
}

/* 联系方式样式 */
.contact-section {
    padding: 100px 0;
    background: #2c3e50;
    color: white;
}

.contact-section .section-title {
    color: white;
}

.contact-section .section-title::after {
    background: #e74c3c;
}

.contact-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 50px;
    align-items: center;
}

.contact-info h3 {
    margin-bottom: 30px;
    font-size: 1.5rem;
}

.contact-item {
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.wechat-code {
    text-align: center;
}

.wechat-code img {
    max-width: 150px;
    border-radius: 8px;
    margin-bottom: 10px;
}

/* 页脚样式 */
.footer {
    background: #1a252f;
    color: #bdc3c7;
    padding: 40px 0;
    text-align: center;
}

.footer-content p {
    margin-bottom: 10px;
}

.footer a {
    color: #3498db;
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 20px;
    border-radius: 10px;
    max-width: 90%;
    max-height: 90%;
    overflow: auto;
}

.close {
    position: absolute;
    right: 15px;
    top: 15px;
    font-size: 2rem;
    cursor: pointer;
    color: #333;
}

.modal-content img {
    max-width: 100%;
    height: auto;
    border-radius: 5px;
}

#modalDescription {
    margin-top: 15px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 5px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
    }

    .nav-menu.active {
        display: flex;
    }

    .hamburger {
        display: flex;
    }

    .banner-title {
        font-size: 2rem;
    }

    .banner-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

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

    .applications-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }

    .container {
        padding: 0 15px;
    }

    .about-content, .product-info {
        padding: 20px;
    }

    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .banner {
        padding: 120px 0 80px;
    }

    .banner-title {
        font-size: 1.8rem;
    }

    .banner-subtitle {
        font-size: 1rem;
    }

    .banner-keywords {
        gap: 10px;
    }

    .banner-keywords span {
        font-size: 12px;
        padding: 6px 12px;
    }

    .cta-button {
        padding: 12px 24px;
        font-size: 16px;
    }

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

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