:root{
    --main:#164080;
    --text:#222;
    --text-gray:#666;
    --light:#f8f9fa;
    --border:#eee;
    --white:#ffffff;
}
*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:"Microsoft YaHei",sans-serif;
}
body{
    color:var(--text);
    line-height:1.7;
    background:#fff;
}
a{
    transition:0.25s;
}
.container{
    width:1200px;
    margin:0 auto;
    padding:0 20px;
}
/* 导航栏 */
header{
    background:#fff;
    box-shadow:0 2px 10px rgba(0,0,0,0.08);
    position:sticky;
    top:0;
    z-index:99;
}
.nav-wrap{
    display:flex;
    justify-content:space-between;
    align-items:center;
    height:70px;
}
.logo-link {
    display: flex;
    align-items: center;
    gap:10px;
    text-decoration:none;
}
.nav-logo {
    height:42px;
    width:auto;
}
.logo-text {
    font-size:24px;
    font-weight:bold;
    color:var(--text);
}
nav a{
    padding:0 16px;
    color:var(--text);
    font-size:16px;
    text-decoration:none;
}
nav a:hover{
    color:var(--main);
}
/* Banner */
.banner{
    position:relative;
    width:100%;
    height:460px;
    background-size:cover;
    background-position:center;
    display:flex;
    align-items:center;
}
/* 半透明品牌蓝遮罩：左侧重右侧轻，保证左侧白字始终清晰可读 */
.banner::before{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(90deg,
        rgba(13,39,80,.82) 0%,
        rgba(13,39,80,.62) 38%,
        rgba(13,39,80,.32) 70%,
        rgba(13,39,80,.18) 100%);
    z-index:0;
}
.banner-content{
    position:relative;
    z-index:1;
    color:#fff;
    text-shadow:0 2px 12px rgba(0,0,0,.45);
}
.banner-content h1{
    font-size:44px;
    margin-bottom:16px;
}
.banner-content p{
    font-size:20px;
    margin-bottom:10px;
}
/* 通用区块 */
.section{
    padding:70px 0;
}
.section-white{
    background:#fff;
}
.section-bg{
    background:var(--light);
}
.title-main{
    text-align:center;
    font-size:32px;
    margin-bottom:42px;
    color:var(--text);
}
.grid4{
    display:grid;
    grid-template-columns:repeat(4, 1fr);
    gap:24px;
}
.grid2{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:30px;
}
.card{
    background:#fff;
    padding:28px;
    border-radius:12px;
    box-shadow:0 2px 12px rgba(0,0,0,0.06);
}
.card h3{
    font-size:20px;
    margin-bottom:14px;
    color:var(--text);
}
/* 新闻模块 */
.news-item{
    padding:24px;
    border-bottom:1px solid var(--border);
    margin-bottom:22px;
}
.news-tag{
    display:inline-block;
    padding:3px 10px;
    background:var(--main);
    color:#fff;
    font-size:13px;
    border-radius:4px;
    margin-bottom:10px;
}
.news-time{
    color:var(--text-gray);
    font-size:14px;
    margin:6px 0;
}
.news-detail-wrap{
    max-width:900px;
    margin:0 auto;
}
.news-detail-wrap h2{
    font-size:28px;
    margin-bottom:12px;
}
.news-detail-meta{
    color:var(--text-gray);
    margin-bottom:30px;
    padding-bottom:12px;
    border-bottom:1px solid var(--border);
}
.news-detail-wrap p{
    margin-bottom:18px;
    font-size:17px;
}
.back-list{
    margin-top:40px;
}
.back-list a{
    color:var(--main);
    text-decoration:none;
}
/* Call */
.call-block{
    padding:70px 0;
    background:var(--main);
    color:#fff;
    text-align:center;
}
.btn-outline{
    display:inline-block;
    border:2px solid #fff;
    color:#fff;
    padding:12px 32px;
    border-radius:8px;
    text-decoration:none;
    font-size:17px;
}
.btn-outline:hover{
    background:#fff;
    color:var(--main);
}
/* Footer */
footer{
    padding:40px 0;
    background:#1a1a1a;
    color:#b8b8b8;
    text-align:center;
}
.footer-link a{
    color:#ccc;
    text-decoration:none;
}
.footer-link a:hover{
    color:#fff;
}
.copyright{
    margin:16px 0;
    font-size:14px;
}
.icp-text a{
    color:#b8b8b8;
    font-size:14px;
    text-decoration:none;
}
/* 移动端响应式适配 */
@media(max-width:1200px){
    .container{
        width:100%;
    }
}
@media(max-width:768px){
    .nav-wrap{
        height:auto;
        padding:12px 0;
        flex-direction:column;
        gap:12px;
    }
    nav{
        display:flex;
        flex-wrap:wrap;
        justify-content:center;
    }
    nav a{
        padding:8px 10px;
    }
    .banner{
        height:320px;
    }
    .banner-content h1{
        font-size:30px;
    }
    .grid4, .grid2{
        grid-template-columns:1fr;
    }
    .title-main{
        font-size:26px;
    }
}
/* ===== 内页 Banner ===== */
.page-banner{
    position:relative;
    width:100%;
    height:320px;
    background-size:cover;
    background-position:center;
    display:flex;
    align-items:center;
    justify-content:center;
    text-align:center;
}
.page-banner::before{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(135deg,
        rgba(13,39,80,.82) 0%,
        rgba(13,39,80,.55) 50%,
        rgba(13,39,80,.34) 100%);
    z-index:0;
}
.page-banner .banner-content{
    position:relative;
    z-index:1;
    text-shadow:0 2px 12px rgba(0,0,0,.45);
}
.page-banner .banner-content h1{
    font-size:38px;
    margin-bottom:12px;
}
.page-banner .banner-content p{
    font-size:18px;
}
/* ===== 数据墙 ===== */
.stats{
    background:linear-gradient(135deg,#164080 0%,#1e5bb0 100%);
    color:#fff;
    padding:56px 0;
}
.stats-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:24px;
    text-align:center;
}
.stat-num{
    font-size:46px;
    font-weight:bold;
    line-height:1.2;
}
.stat-num small{
    font-size:22px;
    font-weight:normal;
    margin-left:2px;
}
.stat-label{
    font-size:15px;
    opacity:.9;
    margin-top:8px;
}
/* ===== 三列网格 ===== */
.grid3{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:24px;
}
/* ===== 产品分组 ===== */
.group-block{
    margin-bottom:56px;
}
.group-block:last-child{
    margin-bottom:0;
}
.group-title{
    font-size:22px;
    color:var(--main);
    margin:0 0 22px;
    padding-left:14px;
    border-left:5px solid var(--main);
    line-height:1.4;
}
.group-desc{
    font-size:15px;
    color:var(--text-gray);
    margin:-12px 0 22px 19px;
}
/* ===== GEO 专区 ===== */
.geo-block{
    background:linear-gradient(135deg,#0d2750 0%,#164080 55%,#1e5bb0 100%);
    color:#fff;
    padding:72px 0;
}
.geo-block .title-main{
    color:#fff;
}
.geo-lead{
    max-width:920px;
    margin:0 auto 46px;
    text-align:center;
    font-size:17px;
    line-height:1.95;
    opacity:.92;
}
.geo-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:24px;
}
.geo-card{
    background:rgba(255,255,255,.08);
    border:1px solid rgba(255,255,255,.16);
    border-radius:12px;
    padding:30px;
}
.geo-card h3{
    font-size:19px;
    margin-bottom:12px;
    color:#fff;
}
.geo-card p{
    color:rgba(255,255,255,.84);
    font-size:15px;
}
.geo-tag{
    display:inline-block;
    font-size:13px;
    padding:4px 14px;
    border:1px solid rgba(255,255,255,.42);
    border-radius:20px;
    margin-bottom:16px;
    color:rgba(255,255,255,.92);
}
/* ===== 标签行 ===== */
.tag-line{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    justify-content:center;
    margin-top:6px;
}
.tag-pill{
    background:#fff;
    border:1px solid var(--border);
    color:var(--text-gray);
    font-size:14px;
    padding:9px 18px;
    border-radius:22px;
}
.section-bg .tag-pill{
    background:#fff;
}
/* ===== 卡片统一描边 ===== */
.card{
    border:1px solid var(--border);
    transition:0.25s;
}
.card:hover{
    box-shadow:0 8px 24px rgba(22,64,128,.12);
    transform:translateY(-3px);
}
/* ===== 正文段落 ===== */
.rich p{
    margin-bottom:16px;
    color:var(--text);
    font-size:16px;
}
.rich h3{
    color:var(--main);
    margin:0 0 16px;
}
/* ===== 响应式补充 ===== */
@media(max-width:900px){
    .stats-grid,.geo-grid,.grid3{
        grid-template-columns:repeat(2,1fr);
    }
}
@media(max-width:768px){
    .stat-num{
        font-size:34px;
    }
    .stat-num small{
        font-size:17px;
    }
    .page-banner{
        height:250px;
    }
    .page-banner .banner-content h1{
        font-size:26px;
    }
    .page-banner .banner-content p{
        font-size:15px;
    }
    .geo-block{
        padding:52px 0;
    }
    .group-title{
        font-size:19px;
    }
}
@media(max-width:520px){
    .stats-grid,.geo-grid,.grid3{
        grid-template-columns:1fr;
    }
}
/* ===== FAQ 常见问题 ===== */
.faq-list{
    max-width:920px;
    margin:0 auto;
}
.faq-item{
    border-bottom:1px solid var(--border);
    padding:22px 0;
}
.faq-item:last-child{
    border-bottom:none;
}
.faq-item h3{
    color:var(--main);
    font-size:19px;
    margin-bottom:10px;
    line-height:1.5;
}
.faq-item p{
    color:var(--text-gray);
    font-size:16px;
    line-height:1.85;
}