/* 基础样式重置 */
* {
    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;
}

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

/* 头部样式 */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.15);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo h1 {
    font-size: 1.5rem;
    font-weight: bold;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 0.6rem;
}

nav ul li:first-child {
    margin-left: 0;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    padding: 0.6rem 1.2rem;
    border-radius: 30px;
    position: relative;
    overflow: hidden;
}

nav ul li a:hover,
nav ul li a.active {
    background-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

/* 主要内容样式 */
main {
    min-height: calc(100vh - 220px);
}

/* 首页英雄区域 */
.hero {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 100%), url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiPjxkZWZzPjxwYXR0ZXJuIGlkPSJwYXR0ZXJuIiB3aWR0aD0iNDAiIGhlaWdodD0iNDAiIHBhdHRlcm5Vbml0cz0idXNlclNwYWNlT25Vc2UiIHBhdHRlcm5UcmFuc2Zvcm09InJvdGF0ZSg0NSkiPjxjaXJjbGUgY3g9IjIwIiBjeT0iMjAiIHI9IjAuNSIgZmlsbD0iI2ZmZiIgZmlsbC1vcGFjaXR5PSIwLjEiLz48L3BhdHRlcm4+PC9kZWZzPjxyZWN0IHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiIGZpbGw9InVybCgjcGF0dGVybikiLz48L3N2Zz4=');
    background-size: cover;
    background-position: center;
    color: white;
    text-align: center;
    padding: 6rem 0;
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
    transform: rotate(30deg);
}

.hero h2 {
    font-size: 2.8rem;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    position: relative;
    animation: fadeInUp 0.8s ease-out;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    max-width: 750px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    opacity: 0.95;
    animation: fadeInUp 1s ease-out;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 14px 35px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.4s ease;
    border: none;
    cursor: pointer;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.25);
    position: relative;
    overflow: hidden;
    font-size: 1.1rem;
    animation: fadeInUp 1.2s ease-out;
}

.btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.35);
}

.btn-outline {
    background: transparent;
    border: 2px solid white;
}

.btn::after {
    content: "";
    position: absolute;
    top: -50%;
    left: -60%;
    width: 20%;
    height: 200%;
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(30deg);
    transition: all 0.6s;
}

.btn:hover::after {
    left: 140%;
}

/* 网站简介 */
.intro {
    padding: 4rem 0;
    background-color: white;
    margin-bottom: 3rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.intro h2,
.news h2,
.services h2,
.cases h2,
.careers h2,
.products-content h2,
.services-content h2,
.knowledge-content h2,
.faq-content h2,
.contact-content h2 {
    text-align: center;
    margin-bottom: 2.5rem;
    font-size: 2.2rem;
    color: #333;
    position: relative;
}

.intro h2::after,
.news h2::after,
.services h2::after,
.cases h2::after,
.careers h2::after,
.products-content h2::after,
.services-content h2::after,
.knowledge-content h2::after,
.faq-content h2::after,
.contact-content h2::after {
    content: '';
    display: block;
    width: 70px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    margin: 15px auto;
    border-radius: 3px;
}

.intro-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2.5rem;
}

.intro-text p {
    margin-bottom: 1.8rem;
    font-size: 1.15rem;
    line-height: 1.8;
    color: #555;
}

.intro-values h3 {
    margin-bottom: 1.2rem;
    color: #667eea;
    font-size: 1.4rem;
}

.intro-values ul {
    list-style-type: none;
}

.intro-values li {
    padding: 0.7rem 0;
    border-bottom: 1px dashed #eee;
    position: relative;
    padding-left: 1.8rem;
    transition: all 0.3s ease;
}

.intro-values li:hover {
    transform: translateX(5px);
}

.intro-values li::before {
    content: '✓';
    color: #667eea;
    position: absolute;
    left: 0;
    font-weight: bold;
    font-size: 1.2rem;
}

/* 新闻动态 */
.news {
    padding: 4rem 0;
    background-color: #f8f9fa;
    margin-bottom: 3rem;
}

.news-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-bottom: 2.5rem;
}

.news-item {
    background: white;
    padding: 1.8rem;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.news-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.news-item::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.news-item h3 {
    color: #333;
    margin-bottom: 0.8rem;
    font-size: 1.3rem;
    line-height: 1.4;
    transition: color 0.3s ease;
}

.news-item h3:hover {
    color: #667eea;
}

.date {
    color: #764ba2;
    font-size: 0.95rem;
    margin-bottom: 1.2rem;
    font-weight: 500;
}

.news-item p {
    color: #666;
    line-height: 1.7;
}

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

/* 业务范围 */
.services {
    padding: 4rem 0;
    background-color: white;
    margin-bottom: 3rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
}

.service-item {
    text-align: center;
    padding: 2.5rem 2rem;
    border-radius: 12px;
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f4ff 100%);
    transition: all 0.4s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.service-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    background: linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%);
}

.service-item::after {
    content: "";
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0) 50%);
    transform: rotate(30deg);
}

.service-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 5px 10px rgba(0, 0, 0, 0.1));
}

.service-item h3 {
    color: #667eea;
    margin-bottom: 1.2rem;
    font-size: 1.4rem;
}

.service-item p {
    color: #666;
    line-height: 1.7;
}

/* 成功案例 */
.cases {
    padding: 4rem 0;
    background-color: #f8f9fa;
    margin-bottom: 3rem;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.case-item {
    background: white;
    padding: 2.2rem;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    border-left: 5px solid #764ba2;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.case-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.12);
}

.case-item::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
}

.case-item h3 {
    color: #333;
    margin-bottom: 1.2rem;
    font-size: 1.3rem;
}

.case-item p {
    color: #666;
    line-height: 1.7;
}

/* 人才发展 */
.careers {
    padding: 4rem 0;
    background-color: white;
    margin-bottom: 3rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.careers-content p {
    text-align: center;
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    color: #666;
    max-width: 850px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.careers-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
    margin-bottom: 2.5rem;
}

.feature {
    text-align: center;
    padding: 2rem;
    border-radius: 12px;
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f4ff 100%);
    transition: all 0.4s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.feature:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.1);
    background: linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%);
}

.feature h3 {
    color: #667eea;
    margin-bottom: 1.2rem;
    font-size: 1.4rem;
}

.feature p {
    color: #666;
    line-height: 1.7;
}

/* 页脚 */
footer {
    background: linear-gradient(135deg, #2c3e50 0%, #1a1a2e 100%);
    color: white;
    padding: 3.5rem 0 1.5rem;
    position: relative;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2.5rem;
    margin-bottom: 2.5rem;
}

.footer-section h3 {
    margin-bottom: 1.2rem;
    position: relative;
    padding-bottom: 0.7rem;
    font-size: 1.3rem;
}

.footer-section h3::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 3px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

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

.footer-section ul li {
    margin-bottom: 0.7rem;
}

.footer-section ul li a {
    color: #ccc;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.footer-section ul li a:hover {
    color: #667eea;
    transform: translateX(5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #aaa;
    font-size: 0.95rem;
}

/* 页面头部样式 */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 5rem 0;
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: "";
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
    transform: rotate(30deg);
}

.page-header h1 {
    font-size: 2.8rem;
    margin-bottom: 1.2rem;
    position: relative;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.page-header p {
    font-size: 1.3rem;
    max-width: 650px;
    margin: 0 auto;
    position: relative;
    opacity: 0.95;
}

/* 新闻筛选 */
.news-filter {
    margin-bottom: 2.5rem;
    text-align: center;
}

.news-filter ul {
    display: flex;
    list-style: none;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.news-filter ul li {
    margin: 0 0.25rem 0.7rem;
}

.news-filter ul li a {
    display: block;
    padding: 0.7rem 1.7rem;
    background: #fff;
    color: #555;
    text-decoration: none;
    border-radius: 30px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.news-filter ul li a:hover,
.news-filter ul li a.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 6px 18px rgba(102, 126, 234, 0.4);
    transform: translateY(-3px);
}

/* 新闻列表样式 */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.news-item {
    display: flex;
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.news-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 18px 35px rgba(0, 0, 0, 0.15);
}

.news-date {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    text-align: center;
    min-width: 130px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.news-date::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255, 255, 255, 0.15) 0%, rgba(255, 255, 255, 0) 50%);
}

.news-date .day {
    display: block;
    font-size: 2.5rem;
    font-weight: bold;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.news-date .month {
    display: block;
    font-size: 1.2rem;
    margin: 0.4rem 0;
    font-weight: 500;
}

.news-date .year {
    display: block;
    font-size: 1rem;
    opacity: 0.95;
    font-weight: 300;
}

.news-body {
    padding: 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-body h3 {
    color: #333;
    margin-bottom: 1.2rem;
    font-size: 1.6rem;
    line-height: 1.4;
    transition: color 0.3s ease;
}

.news-body h3:hover {
    color: #667eea;
}

.excerpt {
    color: #666;
    margin-bottom: 1.8rem;
    line-height: 1.8;
    flex: 1;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #eee;
    padding-top: 1.5rem;
}

.category {
    background: #f0f0f0;
    color: #667eea;
    padding: 0.5rem 1.4rem;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.category:hover {
    background: #667eea;
    color: white;
    transform: scale(1.05);
}

.read-more {
    color: #764ba2;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 1.05rem;
}

.read-more:hover {
    color: #667eea;
    transform: translateX(5px);
}

/* 分页样式 */
.pagination {
    margin-top: 3.5rem;
    text-align: center;
}

.pagination ul {
    display: flex;
    list-style: none;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.pagination ul li {
    margin: 0 0.3rem;
}

.pagination ul li a {
    display: block;
    padding: 0.8rem 1.4rem;
    background: #fff;
    color: #555;
    text-decoration: none;
    border-radius: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    font-weight: 500;
    min-width: 50px;
    position: relative;
    overflow: hidden;
}

.pagination ul li a:hover,
.pagination ul li a.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 6px 18px rgba(102, 126, 234, 0.4);
    transform: translateY(-3px);
}

/* 产品筛选 */
.products-filter {
    margin-bottom: 2.5rem;
    text-align: center;
}

.products-filter ul {
    display: flex;
    list-style: none;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.products-filter ul li {
    margin: 0 0.3rem 0.7rem;
}

.products-filter ul li a {
    display: block;
    padding: 0.7rem 1.7rem;
    background: #fff;
    color: #555;
    text-decoration: none;
    border-radius: 30px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.products-filter ul li a:hover,
.products-filter ul li a.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 6px 18px rgba(102, 126, 234, 0.4);
    transform: translateY(-3px);
}

/* 产品网格 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.product-item {
    background: white;
    border-radius: 15px;
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.product-item:hover {
    transform: translateY(-12px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.product-item::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.product-icon {
    font-size: 4rem;
    margin-bottom: 1.8rem;
    filter: drop-shadow(0 5px 10px rgba(0, 0, 0, 0.1));
}

.product-item h3 {
    color: #333;
    margin-bottom: 1.2rem;
    font-size: 1.5rem;
}

.product-desc {
    color: #666;
    margin-bottom: 1.8rem;
    line-height: 1.8;
}

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

.product-category {
    background: #f0f0f0;
    color: #667eea;
    padding: 0.5rem 1.4rem;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.product-category:hover {
    background: #667eea;
    color: white;
    transform: scale(1.05);
}

.product-more {
    color: #764ba2;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.product-more:hover {
    color: #667eea;
    transform: translateX(5px);
}

/* 服务介绍 */
.services-intro {
    text-align: center;
    margin-bottom: 3.5rem;
    padding: 2.5rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.services-intro::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.services-intro h2 {
    margin-bottom: 1.8rem;
    color: #333;
    font-size: 2rem;
}

.services-intro p {
    font-size: 1.2rem;
    color: #666;
    line-height: 1.9;
    max-width: 850px;
    margin: 0 auto;
}

/* 服务流程 */
.services-process {
    margin-bottom: 3.5rem;
}

.services-process h2 {
    text-align: center;
    margin-bottom: 2.5rem;
    color: #333;
    font-size: 2.2rem;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2.5rem;
}

.process-step {
    text-align: center;
    padding: 2.5rem 1.5rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
    transition: all 0.4s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.process-step:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.process-step:not(:last-child)::after {
    content: '→';
    position: absolute;
    right: -25px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 2rem;
    color: #667eea;
    font-weight: bold;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: bold;
    margin: 0 auto 1.8rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.process-step h3 {
    margin-bottom: 1.2rem;
    color: #333;
    font-size: 1.4rem;
}

.process-step p {
    color: #666;
    line-height: 1.8;
}

/* 服务优势 */
.services-features {
    margin-bottom: 3.5rem;
}

.services-features h2 {
    text-align: center;
    margin-bottom: 2.5rem;
    color: #333;
    font-size: 2.2rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
}

.feature-item {
    text-align: center;
    padding: 2.5rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 18px 35px rgba(0, 0, 0, 0.15);
}

.feature-item::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.feature-icon {
    font-size: 4rem;
    margin-bottom: 1.8rem;
    filter: drop-shadow(0 5px 10px rgba(0, 0, 0, 0.1));
}

.feature-item h3 {
    margin-bottom: 1.2rem;
    color: #333;
    font-size: 1.4rem;
}

.feature-item p {
    color: #666;
    line-height: 1.8;
}

/* 客户评价 */
.services-testimonials {
    margin-bottom: 3.5rem;
}

.services-testimonials h2 {
    text-align: center;
    margin-bottom: 2.5rem;
    color: #333;
    font-size: 2.2rem;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.testimonial-item {
    background: white;
    border-radius: 15px;
    padding: 2.5rem;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.4s ease;
}

.testimonial-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.testimonial-item::before {
    content: '"';
    position: absolute;
    top: 25px;
    left: 25px;
    font-size: 5rem;
    color: #f0f0f0;
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial-item::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.testimonial-content {
    margin-bottom: 1.8rem;
    position: relative;
    z-index: 1;
}

.testimonial-content p {
    font-style: italic;
    color: #555;
    line-height: 1.9;
    font-size: 1.15rem;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    border-top: 1px solid #eee;
    padding-top: 1.2rem;
}

.author-name {
    font-weight: bold;
    color: #333;
    margin-bottom: 0.4rem;
    font-size: 1.1rem;
}

.author-title {
    color: #764ba2;
    font-size: 1rem;
}

/* 知识库搜索 */
.knowledge-search {
    margin-bottom: 3.5rem;
    text-align: center;
}

.search-form {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-input {
    flex: 1;
    padding: 1.2rem;
    border: 2px solid #eee;
    border-radius: 30px 0 0 30px;
    font-size: 1.1rem;
    outline: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.search-input:focus {
    border-color: #667eea;
    box-shadow: 0 6px 15px rgba(102, 126, 234, 0.2);
}

.search-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 0 2.5rem;
    border-radius: 0 30px 30px 0;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
    font-size: 1.1rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.search-btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* 知识分类 */
.knowledge-categories {
    margin-bottom: 3.5rem;
}

.knowledge-categories h2 {
    text-align: center;
    margin-bottom: 2.5rem;
    color: #333;
    font-size: 2.2rem;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.category-item {
    background: white;
    border-radius: 15px;
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.category-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 18px 35px rgba(0, 0, 0, 0.15);
}

.category-item::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.category-icon {
    font-size: 4rem;
    margin-bottom: 1.8rem;
    filter: drop-shadow(0 5px 10px rgba(0, 0, 0, 0.1));
}

.category-item h3 {
    margin-bottom: 1.2rem;
    color: #333;
    font-size: 1.5rem;
}

.category-item p {
    color: #666;
    margin-bottom: 1.8rem;
    line-height: 1.8;
}

.category-link {
    color: #764ba2;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 1.05rem;
}

.category-link:hover {
    color: #667eea;
    transform: translateX(5px);
}

/* 热门文章 */
.knowledge-articles {
    margin-bottom: 3.5rem;
}

.knowledge-articles h2 {
    text-align: center;
    margin-bottom: 2.5rem;
    color: #333;
    font-size: 2.2rem;
}

.articles-list {
    background: white;
    border-radius: 15px;
    padding: 2.5rem;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.article-item {
    padding: 1.8rem 0;
    border-bottom: 1px solid #eee;
}

.article-item:last-child {
    border-bottom: none;
}

.article-item h3 a {
    color: #333;
    text-decoration: none;
    font-size: 1.4rem;
    transition: color 0.3s ease;
    display: inline-block;
}

.article-item h3 a:hover {
    color: #667eea;
    transform: translateX(3px);
}

.article-excerpt {
    color: #666;
    margin: 1.2rem 0;
    line-height: 1.8;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.2rem;
    font-size: 0.95rem;
}

.article-category {
    background: #f0f0f0;
    color: #667eea;
    padding: 0.5rem 1.4rem;
    border-radius: 30px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.article-category:hover {
    background: #667eea;
    color: white;
    transform: scale(1.05);
}

.article-date,
.article-views {
    color: #999;
}

/* 资料下载 */
.knowledge-download {
    margin-bottom: 3.5rem;
}

.knowledge-download h2 {
    text-align: center;
    margin-bottom: 2.5rem;
    color: #333;
    font-size: 2.2rem;
}

.download-list {
    background: white;
    border-radius: 15px;
    padding: 2.5rem;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.download-item {
    display: flex;
    align-items: center;
    padding: 1.8rem 0;
    border-bottom: 1px solid #eee;
}

.download-item:last-child {
    border-bottom: none;
}

.download-icon {
    font-size: 3rem;
    margin-right: 1.8rem;
    min-width: 70px;
    filter: drop-shadow(0 3px 6px rgba(0, 0, 0, 0.1));
}

.download-info h3 {
    margin-bottom: 0.7rem;
    color: #333;
    font-size: 1.3rem;
}

.download-info p {
    color: #666;
    margin-bottom: 1.2rem;
    line-height: 1.7;
}

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

.file-size {
    color: #999;
    font-size: 0.95rem;
}

.download-link {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.7rem 1.8rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.download-link:hover {
    opacity: 0.9;
    transform: translateY(-3px);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.2);
}

/* FAQ分类导航 */
.faq-categories {
    margin-bottom: 2rem;
    text-align: center;
    margin-top: 2rem;
}

.faq-categories ul {
    display: flex;
    list-style: none;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.faq-categories ul li {
    margin: 0 0.3rem 0.7rem;
}

.faq-categories ul li a {
    display: block;
    padding: 0.7rem 1.7rem;
    background: #fff;
    color: #555;
    text-decoration: none;
    border-radius: 30px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.faq-categories ul li a:hover,
.faq-categories ul li a.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 6px 18px rgba(102, 126, 234, 0.4);
    transform: translateY(-3px);
}

/* FAQ手风琴样式 */
.faq-accordion {
    margin-bottom: 3.5rem;
}

.faq-item {
    background: white;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    margin-bottom: 1.5rem;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.faq-question {
    padding: 1.8rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
    position: relative;
}

.faq-question::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.faq-item:hover .faq-question::before {
    transform: scaleX(1);
}

.faq-question:hover {
    background-color: #f9f9ff;
}

.faq-question h3 {
    color: #333;
    margin: 0;
    font-size: 1.3rem;
    line-height: 1.4;
    flex: 1;
}

.faq-toggle {
    font-size: 1.8rem;
    font-weight: bold;
    color: #667eea;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(102, 126, 234, 0.1);
    transition: all 0.3s ease;
}

.faq-toggle:hover {
    background: rgba(102, 126, 234, 0.2);
    transform: rotate(90deg);
}

.faq-answer {
    padding: 0 1.8rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
    padding: 0 1.8rem 1.8rem;
}

.faq-answer p {
    color: #666;
    line-height: 1.9;
    margin-bottom: 1.2rem;
}

.faq-answer ul,
.faq-answer ol {
    padding-left: 1.8rem;
    margin-bottom: 1.2rem;
}

.faq-answer li {
    margin-bottom: 0.7rem;
    line-height: 1.7;
    color: #666;
}

.faq-answer strong {
    color: #333;
}

/* FAQ联系区域 */
.faq-contact {
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem;
    border-radius: 15px;
    margin-bottom: 2.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.faq-contact::before {
    content: "";
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
    transform: rotate(30deg);
}

.contact-info,
.contact-values {
    margin-top: 35px;
}

.contact-info h2 {
    margin-bottom: 25px;
}

.contact-intro {
    text-align: center;
    margin-bottom: 2rem;
}

.faq-contact h2 {
    margin-bottom: 1.5rem;
    font-size: 2.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.faq-contact p {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.95;
}

.faq-contact .btn {
    background: white;
    color: #667eea;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.faq-contact .btn:hover {
    background: #f0f0f0;
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.35);
}

/* 部门联系人 */
.contact-departments {
    margin-bottom: 3.5rem;
}

.contact-departments h2 {
    text-align: center;
    margin-bottom: 2.5rem;
    color: #333;
    font-size: 2.2rem;
}

.departments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
}

.department-item {
    text-align: center;
    padding: 2rem 1.5rem;
    border-radius: 15px;
    background: white;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.department-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 18px 35px rgba(0, 0, 0, 0.15);
}

.department-item::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.department-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 5px 10px rgba(0, 0, 0, 0.1));
}

.department-item h3 {
    color: #667eea;
    margin-bottom: 1.2rem;
    font-size: 1.4rem;
}

.contact-person,
.contact-email {
    color: #666;
    margin-bottom: 0.5rem;
}

.contact-email {
    font-weight: 500;
}

/* 企业信息 */
.contact-info h2,
.contact-values h2 {
    text-align: center;
    margin-bottom: 2.5rem;
    color: #333;
    font-size: 2.2rem;
}

.info-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3.5rem;
}

.info-item {
    text-align: center;
    padding: 2.5rem;
    border-radius: 15px;
    background: white;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.info-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.info-item::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.info-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 5px 10px rgba(0, 0, 0, 0.1));
}

.info-item h3 {
    color: #333;
    margin-bottom: 1.2rem;
    font-size: 1.4rem;
}

.info-item p {
    color: #666;
    font-size: 1.1rem;
    font-weight: 500;
}

/* 企业价值观 */
.contact-values {
    margin-bottom: 3.5rem;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2.5rem;
}

.value-item {
    text-align: center;
    padding: 2rem;
    border-radius: 15px;
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f4ff 100%);
    transition: all 0.4s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.value-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.1);
    background: linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%);
}

.value-icon {
    font-size: 3rem;
    margin-bottom: 1.2rem;
    filter: drop-shadow(0 3px 6px rgba(0, 0, 0, 0.1));
}

.value-item h3 {
    margin-bottom: 1rem;
    color: #333;
    font-size: 1.3rem;
}

.value-item p {
    color: #666;
    line-height: 1.7;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h2 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .page-header h1 {
        font-size: 2.2rem;
    }

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

    .intro-content {
        grid-template-columns: 1fr;
    }

    .news-item {
        flex-direction: column;
    }

    .news-date {
        width: 100%;
    }

    .search-form {
        flex-direction: column;
    }

    .search-input {
        border-radius: 30px;
        margin-bottom: 1rem;
    }

    .search-btn {
        border-radius: 30px;
        padding: 1rem;
    }

    .process-step:not(:last-child)::after {
        display: none;
    }

    .download-item {
        flex-direction: column;
        text-align: center;
    }

    .download-icon {
        margin-right: 0;
        margin-bottom: 1.2rem;
    }

    .download-meta {
        flex-direction: column;
        gap: 1.2rem;
    }

    .article-meta {
        flex-direction: column;
        gap: 0.7rem;
    }

    .news-meta {
        flex-direction: column;
        gap: 1.2rem;
        align-items: flex-start;
    }

    .product-meta {
        flex-direction: column;
        gap: 1.2rem;
        align-items: center;
    }

    .category-link {
        align-self: center;
    }

    header .container {
        flex-direction: column;
        text-align: center;
    }

    nav ul {
        margin-top: 1rem;
        justify-content: center;
    }

    .faq-contact {
        padding: 2.5rem 1.5rem;
    }

    .faq-contact h2 {
        font-size: 1.8rem;
    }

    .faq-contact p {
        font-size: 1.1rem;
    }

    .news-filter ul,
    .products-filter ul,
    .faq-categories ul {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 0.7rem;
    }

    .news-filter ul li,
    .products-filter ul li,
    .faq-categories ul li {
        flex-shrink: 0;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.intro,
.news,
.services,
.cases,
.careers,
.products-content,
.services-content,
.knowledge-content,
.faq-content,
.contact-content {
    animation: fadeInUp 0.8s ease-out;
}

.products-content {
    margin-bottom: 2.5rem;
}