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

:root {
    --primary-blue: #0056b3;
    --secondary-blue: #007bff;
    --dark-blue: #003d80;
    --light-blue: #e3f2fd;
    --accent-orange: #ff6b35;
    --text-dark: #333333;
    --text-light: #666666;
    --white: #ffffff;
    --gray-bg: #f8f9fa;
    --gray-border: #e9ecef;
    --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
    background-color: var(--white);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    position: relative;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-blue);
    margin-bottom: 15px;
}

.section-title .underline {
    height: 4px;
    width: 80px;
    background: linear-gradient(to right, var(--primary-blue), var(--accent-orange));
    margin: 0 auto 20px;
}

.section-title p {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--primary-blue);
    color: var(--white);
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    text-align: center;
}

.btn:hover {
    background-color: var(--dark-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

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

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

/* 头部和导航栏 */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

header.scrolled {
    background-color: var(--white);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
}

.logo:hover {
    text-decoration: none;
}

.logo-img {
    height: 50px;
    width: auto;
}

.logo-text h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark-blue);
    margin-bottom: 0;
    text-decoration: none;
}

.logo-text p {
    font-size: 0.85rem;
    color: var(--text-light);
    letter-spacing: 1px;
    margin-top: 5px;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
    font-size: 1rem;
    position: relative;
    padding: 5px 0;
    transition: var(--transition);
}

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

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

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

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark-blue);
    cursor: pointer;
}

/* 轮播图 */
.hero {
    margin-top: 90px;
    position: relative;
    height: 80vh;
    min-height: 600px;
    overflow: hidden;
}

.carousel {
    position: relative;
    height: 100%;
    width: 100%;
}

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

.carousel-slide.active {
    opacity: 1;
}

.carousel-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    max-width: 800px;
    padding: 0 20px;
}

.carousel-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.carousel-content p {
    font-size: 1.3rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.carousel-controls {
    position: absolute;
    bottom: 30px;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 10px;
    z-index: 10;
}

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

.carousel-dot.active {
    background-color: var(--white);
    transform: scale(1.2);
}

/* 核心能力 */
.core-capabilities {
    background-color: var(--gray-bg);
}

.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.capability-card {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.capability-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.capability-img {
    height: 200px;
    width: 100%;
    background-color: var(--light-blue);
    background-size: cover;
    background-position: center;
}

.capability-content {
    padding: 30px;
}

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

.capability-content p {
    color: var(--text-light);
    margin-bottom: 20px;
}

/* 产品展示 */
.product-showcase {
    background-color: var(--white);
}

.product-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 10px;
}

.tab-btn {
    padding: 12px 25px;
    background-color: var(--gray-bg);
    border: none;
    border-radius: 30px;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    transition: var(--transition);
}

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

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

.product-card {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.product-img {
    height: 250px;
    width: 100%;
    background-color: var(--light-blue);
    background-size: cover;
    background-position: center;
}

.product-info {
    padding: 25px;
}

.product-info h3 {
    font-size: 1.4rem;
    color: var(--dark-blue);
    margin-bottom: 10px;
}

.product-info p {
    color: var(--text-light);
    margin-bottom: 15px;
}

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

.product-features li {
    padding: 8px 0;
    color: var(--text-dark);
    position: relative;
    padding-left: 20px;
}

.product-features li:before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: bold;
}

/* 技术团队 */
.team-section {
    background-color: var(--gray-bg);
}

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

.stat-item {
    text-align: center;
    padding: 30px 20px;
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1.1rem;
    color: var(--text-dark);
    font-weight: 600;
}

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

.team-card {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.team-img {
    height: 250px;
    width: 100%;
    background-color: var(--light-blue);
    background-size: cover;
    background-position: center;
}

.team-info {
    padding: 25px;
    text-align: center;
}

.team-info h3 {
    font-size: 1.3rem;
    color: var(--dark-blue);
    margin-bottom: 5px;
}

.team-info .position {
    color: var(--primary-blue);
    font-weight: 600;
    margin-bottom: 15px;
}

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

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 30px;
    align-items: center;
}

.partner-logo {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--gray-bg);
    border-radius: 8px;
    padding: 15px;
    transition: var(--transition);
}

.partner-logo:hover {
    background-color: var(--light-blue);
    transform: scale(1.05);
}

/* 留言板/联系我们 */
.contact-section {
    background-color: var(--gray-bg);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 50px;
}

.contact-info {
    background-color: var(--white);
    padding: 40px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.contact-item {
    margin-bottom: 25px;
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background-color: var(--light-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 1.2rem;
    color: var(--dark-blue);
    margin-bottom: 5px;
}

.contact-details p {
    color: var(--text-light);
}

.message-form {
    background-color: var(--white);
    padding: 40px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-dark);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--gray-border);
    border-radius: 4px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 86, 179, 0.1);
}

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

/* 页脚 */
footer {
    background-color: var(--dark-blue);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo .logo-text h1 {
    color: var(--white);
    margin-bottom: 15px;
    font-size: 1.8rem;
    text-decoration: none;
}

.footer-logo .logo-text p {
    font-size: 0.85rem;
    text-decoration: none;
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
}

.footer-links h3,
.footer-contact h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--white);
}

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

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

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

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

.footer-contact p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .carousel-content h1 {
        font-size: 2.8rem;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title h2 {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-links {
        position: fixed;
        top: 90px;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition);
        z-index: 999;
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .carousel-content h1 {
        font-size: 2.2rem;
    }
    
    .carousel-content p {
        font-size: 1.1rem;
    }
    
    .section-title h2 {
        font-size: 1.8rem;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .carousel-content h1 {
        font-size: 1.8rem;
    }
    
    .section {
        padding: 50px 0;
    }
    
    .section-title h2 {
        font-size: 1.6rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .team-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-number {
        font-size: 2.2rem;
    }
}

/* 合作伙伴样式 */
.partners-container {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.partners-row {
    display: flex;
    justify-content: space-between;
    flex-wrap: nowrap;
    gap: 20px;
}

.partner-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 20px;
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    min-width: 0; /* 防止flex item溢出 */
}

.partner-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.partner-img-container {
    width: 100%;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
    overflow: hidden;
}

.partner-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.8;
    transition: filter 0.3s ease, opacity 0.3s ease;
}

.partner-item:hover .partner-img {
    filter: grayscale(0%);
    opacity: 1;
}

.partner-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
}
/* 新增页面样式 */

/* 页面标题区域 */
.page-header {
    background-color: var(--primary-blue);
    color: var(--white);
    padding: 80px 0 60px;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 公司新闻页面样式 */
.news-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.main-news {
    margin-bottom: 30px;
}

.news-card {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.news-card.large .news-img {
    height: 300px;
}

.news-card:not(.large) .news-img {
    height: 200px;
}

.news-img {
    width: 100%;
    background-size: cover;
    background-position: center;
}

.news-content {
    padding: 25px;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.news-date i, .news-category {
    margin-right: 5px;
}

.news-category {
    background-color: var(--light-blue);
    color: var(--primary-blue);
    padding: 3px 10px;
    border-radius: 4px;
    font-weight: 500;
}

.news-title {
    font-size: 1.4rem;
    color: var(--dark-blue);
    margin-bottom: 15px;
    line-height: 1.4;
}

.news-excerpt {
    color: var(--text-dark);
    line-height: 1.7;
    margin-bottom: 20px;
}

.read-more {
    color: var(--primary-blue);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}

.read-more i {
    margin-left: 5px;
    transition: transform 0.3s ease;
}

.read-more:hover i {
    transform: translateX(5px);
}

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

/* 新闻订阅 */
.newsletter {
    text-align: center;
    padding: 50px 0;
}

.newsletter h2 {
    color: var(--dark-blue);
    margin-bottom: 15px;
}

.newsletter p {
    color: var(--text-dark);
    margin-bottom: 30px;
    font-size: 1.1rem;
}

.newsletter-form {
    display: flex;
    max-width: 500px;
    margin: 0 auto 20px;
}

.newsletter-form input {
    flex: 1;
    padding: 15px 20px;
    border: 2px solid var(--gray-border);
    border-radius: 4px 0 0 4px;
    font-size: 1rem;
    outline: none;
}

.newsletter-form input:focus {
    border-color: var(--primary-blue);
}

.newsletter-form button {
    padding: 15px 30px;
    border-radius: 0 4px 4px 0;
}

.privacy-notice {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .newsletter-form {
        flex-direction: column;
    }
    
    .newsletter-form input {
        border-radius: 4px;
        margin-bottom: 10px;
    }
    
    .newsletter-form button {
        border-radius: 4px;
        width: 100%;
    }
    
    .secondary-news {
        grid-template-columns: 1fr;
    }
}