/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4A90E2;
    --secondary-color: #2C3E50;
    --accent-color: #E74C3C;
    --text-color: #333;
    --light-gray: #f8f9fa;
    --dark-gray: #666;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 5px 20px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    scroll-behavior: smooth;
}

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

section {
    padding: 80px 0;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 5px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover {
    background: #357ABD;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white);
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}

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

.nav-logo h1 {
    color: var(--primary-color);
    font-size: 24px;
    font-weight: bold;
}

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

.nav-menu a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

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

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    transition: var(--transition);
}

/* 首页横幅 */
.hero {
    height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    position: relative;
    padding-top: 60px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: 0 20px;
}

.hero-content h1 {
    font-size: 48px;
    margin-bottom: 20px;
    animation: fadeInUp 1s ease;
}

.hero-content p {
    font-size: 24px;
    margin-bottom: 40px;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-content .btn {
    margin: 10px;
    animation: fadeInUp 1s ease 0.4s both;
}

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

/* 公司介绍 */
.about {
    background: var(--white);
}

.section-title {
    text-align: center;
    font-size: 36px;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.section-subtitle {
    text-align: center;
    color: var(--dark-gray);
    font-size: 18px;
    margin-bottom: 50px;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.about-text h3 {
    font-size: 28px;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.about-text p {
    color: var(--dark-gray);
    margin-bottom: 30px;
    line-height: 1.8;
}

.features {
    margin-top: 30px;
}

.feature-item {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.feature-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: bold;
    flex-shrink: 0;
}

.feature-text h4 {
    font-size: 18px;
    color: var(--secondary-color);
    margin-bottom: 5px;
}

.feature-text p {
    color: var(--dark-gray);
    font-size: 14px;
    margin-bottom: 0;
}

/* 轮播图样式 */
.carousel {
    position: relative;
    width: 100%;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.carousel-track {
    display: flex;
    transition: transform 0.5s ease;
}

.carousel-slide {
    flex-shrink: 0;
    width: 100%;
}

.carousel-slide img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    display: block;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 28px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}

.carousel-btn:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: translateY(-50%) scale(1.1);
}

.carousel-btn-prev {
    left: 15px;
}

.carousel-btn-next {
    right: 15px;
}

.carousel-indicators {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

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

.indicator:hover {
    background: rgba(255, 255, 255, 0.8);
}

.indicator.active {
    background: white;
    width: 30px;
    border-radius: 6px;
}

/* 产品中心 */
.products {
    background: var(--light-gray);
}

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

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

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

.product-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-info {
    padding: 25px;
}

.product-info h3 {
    font-size: 24px;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.product-info p {
    color: var(--dark-gray);
    margin-bottom: 20px;
    line-height: 1.6;
}

.product-features {
    list-style: none;
    margin-bottom: 20px;
}

.product-features li {
    padding: 5px 0;
    color: var(--dark-gray);
    font-size: 14px;
}

.product-features li::before {
    content: '✓';
    color: var(--primary-color);
    margin-right: 10px;
    font-weight: bold;
}

.product-info .btn {
    width: 100%;
}

/* 合作伙伴 */
.partners {
    background: var(--white);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.partner-item {
    background: var(--light-gray);
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    transition: var(--transition);
}

.partner-item:hover {
    background: var(--white);
    box-shadow: var(--shadow);
    transform: translateY(-5px);
}

.partner-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100px;
}

.partner-logo img {
    max-width: 100%;
    max-height: 60px;
    filter: grayscale(100%);
    transition: var(--transition);
}

.partner-item:hover .partner-logo img {
    filter: grayscale(0%);
}

/* 联系我们 */
.contact {
    background: var(--light-gray);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    margin-top: 40px;
}

/* 左侧联系方式卡片 */
.contact-left {
    display: flex;
    align-items: center;
}

.contact-card {
    width: 100%;
    background: var(--white);
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.contact-card h3 {
    font-size: 26px;
    color: var(--secondary-color);
    margin-bottom: 30px;
    text-align: center;
}

.contact-item-large {
    display: flex;
    gap: 20px;
    padding: 20px;
    border-radius: 10px;
    transition: var(--transition);
    margin-bottom: 15px;
}

.contact-item-large:hover {
    background: var(--light-gray);
}

.contact-icon-large {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    flex-shrink: 0;
}

.contact-text-large h4 {
    font-size: 18px;
    color: var(--secondary-color);
    margin-bottom: 8px;
}

.contact-text-large p {
    color: var(--dark-gray);
    margin-bottom: 5px;
    line-height: 1.6;
}

.contact-text-large .phone-number {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
}

/* 右侧二维码区域 */
.contact-right {
    display: flex;
    flex-direction: column;
}

.qrcode-header {
    text-align: center;
    margin-bottom: 30px;
}

.qrcode-header h3 {
    font-size: 26px;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.qrcode-header p {
    color: var(--dark-gray);
    font-size: 14px;
}

.qrcode-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.qrcode-card {
    background: var(--white);
    padding: 25px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.qrcode-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.qrcode-img-wrapper {
    width: 150px;
    height: 150px;
    margin: 0 auto 20px;
    border-radius: 10px;
    overflow: hidden;
    background: var(--light-gray);
}

.qrcode-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.qrcode-info .qrcode-icon {
    font-size: 32px;
    margin-bottom: 8px;
}

.qrcode-info h4 {
    font-size: 18px;
    color: var(--secondary-color);
    margin-bottom: 8px;
}

.qrcode-info p {
    color: var(--dark-gray);
    font-size: 13px;
}

/* 联系表单 */
.contact-form h3 {
    font-size: 28px;
    color: var(--secondary-color);
    margin-bottom: 30px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--secondary-color);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 5px rgba(74, 144, 226, 0.3);
}

.form-group textarea {
    resize: vertical;
}

.contact-form .btn {
    width: 100%;
}

/* 页脚 */
.footer {
    background: var(--secondary-color);
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 10px;
}

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

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

.footer-section ul a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul a:hover {
    color: var(--white);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
}

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

.back-to-top:hover {
    background: #357ABD;
    transform: translateY(-5px);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .qrcode-cards {
        grid-template-columns: repeat(3, 1fr);
    }

    .hero-content h1 {
        font-size: 36px;
    }

    .hero-content p {
        font-size: 18px;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transition: var(--transition);
        gap: 40px;
    }

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

    .nav-menu a {
        font-size: 20px;
    }

    .hero-content h1 {
        font-size: 28px;
    }

    .hero-content p {
        font-size: 16px;
    }

    .section-title {
        font-size: 28px;
    }

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

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

    .qrcode-cards {
        grid-template-columns: 1fr;
    }

    .contact-wrapper {
        gap: 30px;
    }

    .contact-card {
        padding: 30px;
    }

    .contact-icon-large {
        width: 50px;
        height: 50px;
        font-size: 24px;
    }

    .contact-text-large .phone-number {
        font-size: 18px;
    }

    section {
        padding: 50px 0;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 24px;
    }

    .hero-content .btn {
        display: block;
        margin: 10px 0;
    }

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

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
}