/* 重置默认样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Source Han Sans CN', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: #292929;
    line-height: 1.6;
}

/* 头部导航 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 81px;
    background: rgba(225, 234, 243, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
}

.navbar-container {
    width: 100%;
    max-width: 1600px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 40px;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 28px;
    font-weight: bold;
    color: #292929;
}

.logo img {
    height: 28px;
    margin-right: 10px;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: #292929;
    font-size: 20px;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    color: #B84F0A;
}


/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: #292929;
    border-radius: 3px;
    transition: all 0.3s ease-in-out;
}

/* Banner */
.banner {
    height: 881px;
    background: url('../image/solution/bk001.png') center top no-repeat;
    background-size: cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    margin-top: 81px;
}

.banner-content {
    max-width: 800px;
    margin-left: 400px;
}

.banner h1 {
    font-size: 40px;
    color: #143C84;
    font-weight: bold;
    margin-bottom: 20px;
}

.banner p {
    font-size: 24px;
    color: #143C84;
    line-height: 1.5;
    text-align: left;
    text-indent: 2em;
}

/* 解决方案介绍 */
.solution-intro {
    padding: 80px 0;
    background: #fff;
}

.container {
    width: 1200px;
    margin: 0 auto;
}

.solution-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.solution-text {
    flex: 1;
}

.solution-text h2 {
    font-size: 40px;
    color: #143C84;
    margin-bottom: 30px;
}

.solution-text p {
    font-size: 24px;
    color: #143C84;
    line-height: 1.6;
    text-align: justify;
}

.solution-image {
    flex: 1;
    text-align: center;
}

.solution-image img {
    max-width: 100%;
    border-radius: 8px;
}

/* 核心功能特点 */
.core-features {
    background: #E1EAF3;
    padding: 80px 0;
}

.section-title {
    font-family: SourceHanSansCN-Medium;
    font-size: 40px;
    color: #143C84;
    letter-spacing: 0;
    font-weight: 500;
    margin-bottom: 30px;
    text-align: center;
}
.section-sub-title {
  font-family: SourceHanSansCN-Medium;
  font-size: 24px;
  color: #143C84;
  letter-spacing: 0;
  line-height: 1.5;
  /*font-weight: 500;*/
  text-indent: 50px;
}

.features-container {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
}

.feature-item {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    width: 350px;
}

.feature-item h3 {
    font-size: 28px;
    color: #143C84;
    margin-bottom: 15px;
}

.feature-item p {
    font-size: 20px;
    color: #292929;
    line-height: 1.5;
}

.itemUl {
  margin-top: 100px;
  list-style-type: none;
}
.itemUl > li {
  text-align: left;
  font-family: SourceHanSansCN-Medium;
  font-size: 20px;
  color: #292929;
  letter-spacing: 0;
  line-height: 26px;
  font-weight: 500;
  margin-bottom: 20px;
}
.itemUl > li > span {
  font-family: SourceHanSansCN-Medium;
  font-size: 20px;
  color: #D98E04;
  letter-spacing: 0;
  line-height: 26px;
  font-weight: 500;
}

.highlight {
    color: #D98E04;
    font-weight: 500;
}

/* 技术优势 */
.technical-advantages {
    padding: 120px 0;
    background: #fff;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 30px;
    margin-top: 40px;
}

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

.advantage-item img {
    width: 34px;
    height: 35px;
    margin-bottom: 15px;
}

.advantage-item h3 {
    font-size: 20px;
    color: #D98E04;
    margin-bottom: 10px;
}

.advantage-item p {
    font-size: 20px;
    color: #292929;
    text-align: left;
    line-height: 1.5;
}

/* 核心技术 */
.core-technology {
    background: #E1EAF3;
    padding: 80px 0;
}

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

.technology-content h2 {
    font-size: 28px;
    color: #292929;
    margin-bottom: 30px;
}

.technology-description {
    font-size: 24px;
    color: #143C84;
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
    background: #fff;
    padding: 30px;
    border-radius: 30px;
}

/* 底部 */
.footer {
    background: url('../image/index/bk005.png') center/cover no-repeat;
    color: #E8EFF2;
    padding: 40px 0 20px;
}

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

.footer-top {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
}

.footer-info {
    flex: 1;
}

.footer-info h3 {
    font-size: 20px;
    margin-bottom: 15px;
}

.footer-info p {
    font-family: SourceHanSansSC-Medium;
    font-size: 20px;
    color: #E8EFF2;
    letter-spacing: 0;
    font-weight: 500;
}

.footer-contact {
    flex: 1;
}

.footer-contact h3 {
    font-size: 20px;
    margin-bottom: 15px;
}

.footer-contact p {
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 10px;
}

.footer-divider {
    height: 1px;
    background: rgba(216, 216, 216, 0.42);
    margin: 20px 0;
}

.footer-bottom {
    text-align: center;
    font-size: 16px;
    padding: 20px 0;
    display: flex;
    flex-direction: row;
    
}

.footer-bottom p {
    margin: 5px 0;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .container {
        width: 95%;
        padding: 0 15px;
    }
    
    .footer-content {
        width: 95%;
    }
    
    .header {
        padding: 0 50px;
    }
}

@media (max-width: 992px) {
    .solution-content {
        flex-direction: column;
        gap: 30px;
    }
    
    .solution-text {
        text-align: center;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .section-title {
        font-family: SourceHanSansCN-Medium;
        font-size: 28px;
        color: #292929;
        letter-spacing: 0;
        font-weight: 500;
    }
    
    .solution-text h2 {
        font-size: 32px;
    }
    
    .solution-text p,
    .technology-description {
        font-size: 20px;
    }
    
    .feature-item {
        width: 100%;
    }
    
    .feature-item h3 {
        font-size: 24px;
    }
    
    .footer-top {
        flex-direction: column;
        gap: 30px;
    }
    
    .footer-links {
        flex-wrap: wrap;
    }
    
    .header {
        padding: 0 30px;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(225, 234, 243, 0.95);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        clip-path: circle(0px at top right);
        transition: all 0.3s ease-in-out;
        z-index: 1000;
    }
    
    .nav.active {
        clip-path: circle(1500px at top right);
    }
    
    .nav li {
        margin: 20px 0;
    }
    
    .nav a {
        font-size: 24px;
    }
    
    .header {
        padding: 0 20px;
    }
    
    .banner {
        height: 600px;
    }
    
    .banner h1 {
        font-size: 32px;
    }
    
    .banner p {
        font-size: 20px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 28px;
        margin-bottom: 40px;
    }
    
    .solution-text h2 {
        font-size: 28px;
        margin-bottom: 20px;
    }
    
    .solution-text p,
    .technology-description {
        font-size: 18px;
    }
    
    .feature-item h3 {
        font-size: 20px;
    }
    
    .advantage-item p {
        font-size: 18px;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .technology-description {
        border-radius: 20px;
        padding: 20px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 10px;
    }
    
    .footer-links a {
        font-size: 18px;
    }
    
    .footer-info {
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .header {
        height: 70px;
        padding: 0 15px;
    }
    
    .logo {
        font-size: 24px;
    }
    
    .banner {
        height: 500px;
        margin-top: 70px;
    }
    
    .banner h1 {
        font-size: 28px;
    }
    
    .banner p {
        font-size: 18px;
    }
    
    .section {
        padding: 50px 0;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .solution-text h2 {
        font-size: 24px;
    }
    
    .solution-text p,
    .technology-description,
    .advantage-item p {
        font-size: 16px;
    }
    
    .feature-item {
        padding: 20px;
    }
    
    .feature-item h3 {
        font-size: 18px;
    }
    
    .technology-description {
        border-radius: 15px;
        padding: 15px;
    }
    
    .footer-logo {
        font-size: 24px;
    }
    
    .footer-links a {
        font-size: 16px;
    }
    
    .footer-bottom {
        font-size: 14px;
    }
}