/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", sans-serif;
}

body {
    line-height: 1.8;
    color: #333;
    background-color: #f5f7fa;
}

.container {
    width: 92%;
    max-width: 1250px;
    margin: 0 auto;
}

/* 头部导航 */
.header {
    background: #004080;
    padding: 18px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px #ccc;
}

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

.logo h1 {
    color: #fff;
    font-size: 26px;
    letter-spacing: 1px;
}

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

.nav ul li {
    margin-left: 28px;
}

.nav ul li a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    padding: 6px 12px;
    border-radius: 4px;
    transition: 0.3s;
}

.nav ul li a:hover,
.nav ul li a.active {
    background: #ffaa00;
    color: #fff;
}

/* Banner样式 */
.banner {
    height: 520px;
    background: linear-gradient(rgba(0,0,0,0.45), rgba(0,0,0,0.45)), url('../pic/banner.jpg');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
}

.banner-content h2 {
    font-size: 46px;
    margin-bottom: 22px;
    text-shadow: 2px 2px 4px #000;
}

.banner-content p {
    font-size: 22px;
}

/* 首页核心业务 */
.core-business {
    padding: 70px 0;
    text-align: center;
}

.core-business h3 {
    font-size: 34px;
    color: #004080;
    margin-bottom: 45px;
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 35px;
}

.business-item {
    background: #fff;
    padding: 35px 25px;
    border-radius: 10px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.08);
    transition: 0.3s;
}
.business-item:hover{
    transform: translateY(-6px);
}
.business-item h4 {
    font-size: 23px;
    color: #004080;
    margin: 15px 0;
}

/* 通用页面内容区 */
.page-content {
    padding: 70px 0;
    min-height: 550px;
}

.page-content h2 {
    font-size: 32px;
    color: #004080;
    margin-bottom: 35px;
    text-align: center;
    border-bottom: 2px solid #ffaa00;
    display: inline-block;
    padding-bottom: 10px;
}
.title-wrap{
    text-align: center;
}

.content-box {
    background: #fff;
    padding: 45px;
    border-radius: 10px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.08);
}

.page-content p {
    font-size: 17px;
    margin-bottom: 18px;
    text-indent: 2em;
}

.page-content ul {
    margin-left: 25px;
    margin-bottom: 25px;
}

.page-content li {
    margin-bottom: 10px;
    font-size: 16px;
}

/* 图文通用样式 */
.img-left{
    display: flex;
    gap:30px;
    align-items: center;
    margin:30px 0;
}
.img-right{
    display: flex;
    flex-direction: row-reverse;
    gap:30px;
    align-items: center;
    margin:30px 0;
}
.text-box{
    flex:1;
}
.img-box{
    flex:1;
}
.img-box img{
    width:100%;
    height:auto;
    border-radius:8px;
    box-shadow:0 2px 10px #eee;
}
.single-img{
    width:100%;
    margin:25px 0;
    border-radius:8px;
}

/* 产品图文两列 */
.produce-row{
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap:30px;
    margin:35px 0;
}
.produce-card{
    border:1px solid #eee;
    border-radius:8px;
    overflow:hidden;
}
.produce-card img{
    width:100%;
    height:220px;
    object-fit:cover;
}
.produce-card .txt{
    padding:20px;
}

/* 底部 */
.footer {
    background: #004080;
    color: #fff;
    text-align: center;
    padding: 30px 0;
    margin-top: 40px;
}

.footer p {
    margin-bottom: 10px;
    font-size:15px;
}

a, a:hover, a:visited, a:link {
  text-decoration: none;
  color:#fff;
}