/* ==========================================================================
   西安图源地理信息技术有限公司 官网样式
   主色系：科技深蓝 + 明蓝（测绘 / 空天 / 数据）
   ========================================================================== */
:root{
  --c1:#0b2c55;            /* 主深蓝 */
  --c2:#164a8a;            /* 次级蓝 */
  --brand:#0f6bed;         /* 亮蓝 accent */
  --brand-soft:#e8f1ff;
  --ink:#1f2a3a;
  --mut:#5c6877;
  --bg2:#f4f7fc;
  --line:#e3eaf3;
  --ok:#0f9d58;
  --w:#ffffff;
  --radius:10px;
  --shadow:0 8px 24px rgba(11,44,85,.08);
  --shadow-lg:0 18px 44px rgba(11,44,85,.14);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:#fff;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
.container{width:min(1200px,92%);margin:0 auto}
.sec{padding:76px 0}
.sec.bg{background:var(--bg2)}
/* 通用标题 */
.sec-head{text-align:center;max-width:820px;margin:0 auto 44px}
.sec-head .tag{display:inline-block;font-size:13px;letter-spacing:2px;color:var(--brand);background:var(--brand-soft);padding:4px 14px;border-radius:30px;margin-bottom:12px;font-weight:600}
.sec-head h2{font-size:30px;font-weight:700;color:var(--c1);letter-spacing:.5px}
.sec-head .line{width:46px;height:3px;background:var(--brand);border-radius:2px;margin:14px auto}
.sec-head p{color:var(--mut);font-size:15px}
/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--brand);color:#fff;padding:10px 26px;border-radius:6px;font-size:15px;transition:.2s;border:none;cursor:pointer}
.btn:hover{background:var(--c2);transform:translateY(-1px)}
.btn.lg{padding:13px 34px;font-size:16px}
.btn.ghost{background:transparent;border:1.5px solid rgba(255,255,255,.7);color:#fff}
.btn.ghost:hover{background:rgba(255,255,255,.15);transform:none}
/* ============ 顶栏 Header ============ */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);box-shadow:0 2px 12px rgba(11,44,85,.06)}
.hd-top{background:var(--c1);color:#cdd9ea;font-size:13px}
.hd-top .container{display:flex;justify-content:space-between;align-items:center;min-height:34px;flex-wrap:wrap;gap:4px}
.hd-top a{color:#cdd9ea}
.hd-top a:hover{color:#fff}
.hd-main .container{display:flex;align-items:center;justify-content:space-between;height:74px;gap:20px}
.logo{display:flex;align-items:center;gap:12px}
.logo img{height:46px;width:auto}
.logo .nm{font-size:19px;font-weight:800;color:var(--c1);line-height:1.2}
.logo .nm small{display:block;font-size:11px;font-weight:400;color:var(--mut);letter-spacing:2px}
.nav{display:flex;align-items:center;gap:4px}
.nav a{padding:8px 15px;font-size:15px;color:var(--ink);border-radius:6px;font-weight:500;transition:.18s}
.nav a:hover,.nav a.active{color:var(--brand);background:var(--brand-soft)}
.nav .cta{color:#fff;background:var(--brand);font-weight:600}
.nav .cta:hover{background:var(--c2);color:#fff}
.nav-toggle{display:none;background:none;border:none;font-size:26px;cursor:pointer;color:var(--c1)}
/* ============ Hero / 内页头 ============ */
.hero{position:relative;color:#fff;background:linear-gradient(135deg,#0a2450 0%,#124a8f 55%,#1e6fd9 100%);overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(800px 420px at 85% -10%,rgba(76,152,255,.35),transparent 60%),radial-gradient(600px 320px at 8% 110%,rgba(20,120,255,.28),transparent 55%)}
.hero .container{position:relative;z-index:2;padding:92px 0 100px;max-width:1200px}
.hero.kicker{font-size:14px;letter-spacing:3px;color:#a9c7f2;text-transform:uppercase}
.hero h1{font-size:46px;line-height:1.25;font-weight:800;margin:14px 0 18px;letter-spacing:.5px}
.hero h1 span{color:#7db7ff}
.hero p.lead{font-size:17px;color:#dbe7fb;max-width:680px}
.hero .actions{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.hero .stats{display:flex;gap:48px;margin-top:56px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.18);padding-top:26px}
.hero .stats b{font-size:28px;display:block;color:#fff}
.hero .stats span{font-size:13px;color:#a9c7f2}
/* 内页头部 */
.page-hero{background:linear-gradient(120deg,#0a2450,#144f97 70%,#1e6fd9);color:#fff;padding:52px 0}
.page-hero h1{font-size:30px;font-weight:800}
.page-hero .crumb{font-size:13px;color:#b6cdf2;margin-top:6px}
.page-hero .crumb a{color:#dfeafb}
/* 首页导航下方快捷入口 */
.quick{position:relative;z-index:5;margin-top:-36px}
.quick .box{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;background:#fff;border-radius:12px;box-shadow:var(--shadow);padding:26px 22px}
.quick a{text-align:center;padding:8px 4px;border-radius:8px;color:var(--c1);font-weight:600;transition:.18s}
.quick a:hover{color:var(--brand);background:var(--brand-soft)}
/* 区块通用栅格 */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:34px}
@media(max-width:960px){.grid3,.grid4{grid-template-columns:repeat(2,1fr)}.grid2{grid-template-columns:1fr}}
@media(max-width:640px){.grid3,.grid4{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:26px;transition:.22s}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px);border-color:#c9dcf5}
.card .ico{width:52px;height:52px;border-radius:12px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-size:26px;margin-bottom:16px}
.card h3{font-size:18px;color:var(--c1);margin-bottom:8px}
.card p{font-size:14px;color:var(--mut)}
/* 关于：图文 */
.about-flex{display:grid;grid-template-columns:5fr 7fr;gap:44px;align-items:center}
.about-flex .ph{position:relative;border-radius:14px;overflow:hidden;box-shadow:var(--shadow-lg)}
.about-flex .ph img{height:100%;object-fit:cover}
.about-flex .ph .badge{position:absolute;left:18px;bottom:18px;background:rgba(11,44,85,.85);color:#fff;padding:8px 16px;border-radius:8px;font-size:13px;backdrop-filter:blur(4px)}
.about-flex ul.tick{margin:14px 0 6px}
.about-flex ul.tick li{position:relative;padding:5px 0 5px 26px;color:var(--ink);font-size:15px}
.about-flex ul.tick li::before{content:"✓";position:absolute;left:2px;color:var(--brand);font-weight:800}
@media(max-width:860px){.about-flex{grid-template-columns:1fr}}
/* 资质荣誉 */
.certs{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:960px){.certs{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.certs{grid-template-columns:1fr}}
.cert{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.2s;display:flex;flex-direction:column}
.cert:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.cert .p{background:#fbfdff;padding:18px;display:grid;place-items:center;border-bottom:1px solid var(--line)}
.cert .p img{max-height:230px;object-fit:contain;width:auto}
.cert .n{padding:14px 16px;font-size:15px;color:var(--c1);font-weight:600;text-align:center}
/* 新闻 / 职位 列表 */
.list-card{display:flex;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:10px;padding:18px 20px;margin-bottom:14px;transition:.18s}
.list-card:hover{box-shadow:var(--shadow);border-color:#c9dcf5;transform:translateX(4px)}
.list-card .t{flex:1}
.list-card .t h3{font-size:17px;color:var(--c1);margin-bottom:4px}
.list-card .t p{font-size:14px;color:var(--mut);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.list-card .meta{text-align:right;color:#93a2b4;font-size:13px;flex-shrink:0}
.list-card .meta b{color:var(--brand)}
/* 数字/表格 */
.tbl{width:100%;border-collapse:collapse;background:#fff;border-radius:10px;overflow:hidden}
.tbl th,.tbl td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}
.tbl th{background:#0b2c55;color:#fff;font-weight:600}
.tbl tr:last-child td{border-bottom:none}
.tbl tr:hover td{background:#f7faff}
/* 图片画廊 */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.gallery figure{border-radius:10px;overflow:hidden;background:#eef3fb;position:relative;aspect-ratio:4/3}
.gallery img{width:100%;height:100%;object-fit:cover;transition:.3s}
.gallery figure:hover img{transform:scale(1.05)}
.gallery figcaption{position:absolute;left:0;right:0;bottom:0;padding:22px 12px 10px;background:linear-gradient(transparent,rgba(8,30,60,.75));color:#fff;font-size:13px}
/* 联系 */
.contact-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:40px}
.contact-item{display:flex;gap:16px;padding:18px 0;border-bottom:1px dashed var(--line)}
.contact-item .ic{width:46px;height:46px;flex-shrink:0;border-radius:10px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-size:22px}
.contact-item h4{color:var(--c1);font-size:15px}
.contact-item p{color:var(--mut);font-size:15px}
.map{width:100%;height:340px;border:0;border-radius:12px;box-shadow:var(--shadow)}
/* Footer */
.site-footer{background:#08203f;color:#9db2cc;font-size:14px}
.footer-top .container{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:34px;padding:56px 0 34px}
.footer-top h4{color:#fff;font-size:16px;margin-bottom:18px;position:relative;padding-bottom:10px}
.footer-top h4::after{content:"";position:absolute;left:0;bottom:0;width:28px;height:2px;background:var(--brand)}
.footer-top ul li{padding:4px 0}
.footer-top ul li a:hover{color:#fff}
.footer-top .brand p{margin-top:14px;color:#9db2cc}
.footer-top .brand img{height:44px}
.footer-bot{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;text-align:center;font-size:13px;color:#7c92af}
.footer-bot a{color:#7c92af}
@media(max-width:900px){
  .nav{display:none}
  .nav.open{display:flex;flex-direction:column;position:absolute;top:74px;left:0;right:0;background:#fff;box-shadow:0 14px 30px rgba(11,44,85,.12);padding:14px}
  .nav-toggle{display:block}
  .hero h1{font-size:32px}
  .hero .stats{gap:24px}
  .footer-top .container{grid-template-columns:1fr 1fr}
  .sec{padding:52px 0}
}
@media(max-width:560px){.footer-top .container{grid-template-columns:1fr}.list-card{flex-direction:column;align-items:flex-start}}
/* 辅助 */
.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mt-32{margin-top:32px}
.text-brand{color:var(--brand)}.text-mut{color:var(--mut)}
.tc{text-align:center}
.feature-num{display:flex;gap:26px;flex-wrap:wrap;justify-content:center;margin-top:20px}
.feature-num div{text-align:center;padding:10px 22px}
.feature-num b{font-size:26px;color:var(--brand);display:block}
.feature-num span{font-size:13px;color:var(--mut)}
/* ============ 首页 Hero 覆盖背景图 ============ */
.hero.cover{background:linear-gradient(100deg,rgba(7,25,52,.92) 0%,rgba(10,46,94,.78) 45%,rgba(12,60,120,.55) 100%),url("../images/scene_lidar.jpg") center/cover no-repeat}
.hero.cover .stats{border-top-color:rgba(255,255,255,.22)}
/* 统计数字动效 */
.stat b{font-size:28px;display:block}
.stat span{font-size:13px;color:#a9c7f2}
/* ============ 合作流程 Steps ============ */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:12px;padding:26px 18px;text-align:center}
.step .no{width:44px;height:44px;margin:0 auto 14px;border-radius:50%;background:linear-gradient(135deg,var(--c1),var(--brand));color:#fff;display:grid;place-items:center;font-weight:700;font-size:18px}
.step h4{font-size:15px;color:var(--c1);margin-bottom:6px}
.step p{font-size:13px;color:var(--mut)}
.step::after{content:"›";position:absolute;right:-15px;top:50%;transform:translateY(-50%);color:#b9cbe4;font-size:22px;z-index:2}
.step:last-child::after{display:none}
@media(max-width:860px){.steps{grid-template-columns:repeat(2,1fr)}.step::after{display:none}}
@media(max-width:520px){.steps{grid-template-columns:1fr}}
/* ============ 案例墙 ============ */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.case{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 18px;transition:.18s}
.case:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:#c9dcf5}
.case .yr{flex-shrink:0;width:58px;text-align:center;background:var(--c1);color:#fff;border-radius:8px;padding:6px 2px;font-size:15px;font-weight:700}
.case .yr small{display:block;font-size:10px;font-weight:400;opacity:.85}
.case h4{font-size:15px;color:var(--c1);line-height:1.4;margin-bottom:4px}
.case p{font-size:13px;color:var(--mut)}
@media(max-width:960px){.case-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.case-grid{grid-template-columns:1fr}}
/* ============ 时间轴 timeline ============ */
.timeline{position:relative;max-width:860px;margin:0 auto;padding-left:28px}
.timeline::before{content:"";position:absolute;left:8px;top:4px;bottom:4px;width:2px;background:linear-gradient(var(--brand),#cfdcf2)}
.tl{position:relative;padding:0 0 24px 18px}
.tl::before{content:"";position:absolute;left:-24px;top:6px;width:12px;height:12px;border-radius:50%;background:#fff;border:3px solid var(--brand)}
.tl .y{display:inline-block;font-size:13px;color:var(--brand);background:var(--brand-soft);padding:2px 10px;border-radius:20px;font-weight:600}
.tl h4{font-size:16px;color:var(--c1);margin:6px 0 4px}
.tl p{font-size:14px;color:var(--mut)}
/* ============ FAQ ============ */
.faq{max-width:820px;margin:0 auto}
.faq details{background:#fff;border:1px solid var(--line);border-radius:10px;margin-bottom:12px;overflow:hidden}
.faq summary{cursor:pointer;padding:16px 20px;font-size:15px;font-weight:600;color:var(--c1);list-style:none;display:flex;justify-content:space-between;align-items:center;gap:10px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"＋";color:var(--brand);font-size:18px;transition:.2s}
.faq details[open] summary::after{content:"－"}
.faq details .a{padding:0 20px 16px;color:var(--mut);font-size:14px;line-height:1.9}
/* ============ 悬浮操作条 ============ */
.float-bar{position:fixed;right:18px;bottom:22px;z-index:80;display:flex;flex-direction:column;gap:10px}
.float-bar a,.float-bar button{width:46px;height:46px;border-radius:50%;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);display:grid;place-items:center;font-size:20px;color:var(--c1);cursor:pointer;transition:.2s}
.float-bar a:hover,.float-bar button:hover{background:var(--brand);color:#fff;border-color:var(--brand)}
.float-bar .tel{background:var(--brand);color:#fff;border:none;font-size:18px}
.float-bar .tel:hover{background:var(--c2)}
/* 返回顶部隐藏态 */
.float-bar .to-top{opacity:0;pointer-events:none}
.float-bar.show-top .to-top{opacity:1;pointer-events:auto}
/* 标签 chip */
.chip{display:inline-block;padding:3px 12px;border-radius:20px;font-size:12px;background:var(--brand-soft);color:var(--brand);margin:2px 4px 2px 0}
/* 实拍展示 */
.shot-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.shot-grid figure{border-radius:10px;overflow:hidden;position:relative;aspect-ratio:4/3;background:#e8f0fb;margin:0}
.shot-grid img{width:100%;height:100%;object-fit:cover;transition:.3s}
.shot-grid figure:hover img{transform:scale(1.06)}
.shot-grid figcaption{position:absolute;left:0;right:0;bottom:0;padding:20px 12px 8px;background:linear-gradient(transparent,rgba(8,30,60,.72));color:#fff;font-size:13px}
@media(max-width:900px){.shot-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.shot-grid{grid-template-columns:1fr}}