/* 汇德创官网 · 主样式
   品牌色：深海军蓝 / 汇德创蓝 / 琥珀金
   设计目标：静态渲染（不依赖 JS，便于搜索引擎与 AI 爬虫抓取） */
:root{
  --navy:#0A1E3F;
  --blue:#1B4FA0;
  --blue-2:#2E6BD6;
  --sky:#EAF1FB;
  --amber:#E8A33D;
  --ink:#1A2233;
  --gray:#5A6474;
  --line:#D9E0EC;
  --bg:#FFFFFF;
  --soft:#F5F8FC;
  --maxw:1180px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--blue);text-decoration:none;}
a:hover{color:var(--blue-2);}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}

/* ---------- 顶栏 ---------- */
.hdr{background:var(--navy);color:#fff;position:sticky;top:0;z-index:50;}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;height:66px;gap:20px;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand img{height:30px;background:#fff;border-radius:4px;padding:3px 8px;}
.brand .txt{font-size:17px;font-weight:700;letter-spacing:.5px;}
.brand .txt small{display:block;font-size:11px;color:#8FA3C8;font-weight:400;letter-spacing:1px;}
.nav{display:flex;gap:26px;align-items:center;}
.nav a{color:#C7D3E8;font-size:15px;padding:4px 0;border-bottom:2px solid transparent;}
.nav a:hover,.nav a.on{color:#fff;border-bottom-color:var(--amber);}
.lang{display:flex;gap:8px;align-items:center;font-size:13px;flex-shrink:0;}
.lang a{color:#8FA3C8;border:1px solid #2A3E63;border-radius:4px;padding:4px 10px;}
.lang a.on{color:var(--amber);border-color:var(--amber);}
.burger{display:none;background:none;border:1px solid #2A3E63;color:#fff;font-size:20px;padding:4px 10px;border-radius:4px;cursor:pointer;}

/* ---------- 首屏 ---------- */
.hero{background:linear-gradient(135deg,#0A1E3F 0%,#123A72 100%);color:#fff;padding:76px 0 64px;}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
.hero h1{font-size:40px;line-height:1.25;font-weight:800;letter-spacing:1px;margin-bottom:16px;}
.hero .sub{font-size:15px;color:#8FA3C8;letter-spacing:2px;margin-bottom:20px;text-transform:uppercase;}
.hero .lead{font-size:17px;color:#D5DEEE;line-height:1.9;margin-bottom:28px;}
.hero .lead b{color:var(--amber);}
.hero .btns{display:flex;gap:14px;flex-wrap:wrap;}
.btn{display:inline-block;padding:13px 30px;border-radius:6px;font-size:15px;font-weight:600;transition:.2s;}
.btn-p{background:var(--amber);color:#12233F;}
.btn-p:hover{background:#F0B558;color:#12233F;}
.btn-o{border:1px solid #4A6BA0;color:#D5DEEE;}
.btn-o:hover{border-color:var(--amber);color:var(--amber);}
.hero .pic{border-radius:12px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.4);}
.hstats{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:34px;padding-top:26px;border-top:1px solid #2A3E63;}
.hstats b{display:block;font-size:27px;color:#fff;font-weight:800;line-height:1.2;}
.hstats span{font-size:13px;color:#8FA3C8;}

/* ---------- 通用区块 ---------- */
.sec{padding:70px 0;}
.sec.soft{background:var(--soft);}
.sec.dark{background:var(--navy);color:#fff;}
.sec.dark h2,.sec.dark h3{color:#fff;}
.sec.dark p{color:#C7D3E8;}
.sechead{max-width:760px;margin-bottom:42px;}
.sechead h2{font-size:30px;font-weight:800;color:var(--navy);margin-bottom:12px;letter-spacing:.5px;}
.sechead .en{font-size:13px;color:var(--amber);letter-spacing:3px;text-transform:uppercase;margin-bottom:10px;}
.sechead p{font-size:16px;color:var(--gray);line-height:1.9;}
.sec.dark .sechead p{color:#8FA3C8;}

/* ---------- 卡片 ---------- */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:28px;transition:.2s;}
.card:hover{border-color:var(--blue);box-shadow:0 8px 24px rgba(27,79,160,.08);}
.card .ico{width:44px;height:44px;border-radius:8px;background:var(--sky);color:var(--blue);
  display:flex;align-items:center;justify-content:center;font-size:19px;font-weight:800;margin-bottom:16px;}
.card h3{font-size:19px;color:var(--navy);margin-bottom:10px;font-weight:700;}
.card p{font-size:15px;color:var(--gray);line-height:1.85;}
.card ul{list-style:none;margin-top:12px;}
.card ul li{font-size:14px;color:var(--gray);padding-left:16px;position:relative;margin-bottom:7px;line-height:1.7;}
.card ul li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:50%;background:var(--amber);}
.sec.dark .card{background:#12294F;border-color:#22355C;}
.sec.dark .card h3{color:#fff;}
.sec.dark .card p,.sec.dark .card ul li{color:#A9B7D0;}
.sec.dark .card .ico{background:#1B3A66;color:var(--amber);}

/* ---------- 表格 ---------- */
.tblwrap{overflow-x:auto;border-radius:10px;border:1px solid var(--line);background:#fff;}
table{width:100%;border-collapse:collapse;font-size:15px;min-width:640px;}
table th{background:var(--navy);color:#fff;padding:14px 14px;font-weight:600;text-align:center;white-space:nowrap;}
table td{padding:13px 14px;text-align:center;border-bottom:1px solid var(--line);color:#333A48;}
table tbody tr:nth-child(even) td{background:#F7F9FC;}
table td:first-child{color:var(--blue);font-weight:700;}
table tbody tr:hover td{background:var(--sky);}
.tblnote{font-size:13.5px;color:var(--gray);margin-top:14px;line-height:1.8;}

/* ---------- 数据条 ---------- */
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.metric{background:#12294F;border:1px solid #22355C;border-radius:10px;padding:32px 26px;text-align:center;}
.metric b{display:block;font-size:44px;color:var(--amber);font-weight:800;line-height:1.1;}
.metric b i{font-size:20px;font-style:normal;}
.metric .nm{font-size:16px;color:#fff;font-weight:600;margin:12px 0 8px;}
.metric .cd{font-size:13.5px;color:#8FA3C8;line-height:1.7;text-align:left;}

/* ---------- 对比条 ---------- */
.bars{display:flex;flex-direction:column;gap:16px;}
.bar{display:grid;grid-template-columns:170px 1fr 130px;align-items:center;gap:18px;}
.bar .lb{font-size:15px;text-align:right;color:#333A48;}
.bar .tr{background:#EEF2F8;border-radius:6px;height:38px;overflow:hidden;}
.bar .fl{height:100%;border-radius:6px;}
.bar .vl{font-size:15px;font-weight:700;color:var(--navy);}

/* ---------- FAQ（GEO 核心：自包含短答案） ---------- */
.faq{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;}
.faq details{border-bottom:1px solid var(--line);}
.faq details:last-child{border-bottom:none;}
.faq summary{cursor:pointer;padding:20px 26px;font-size:17px;font-weight:600;color:var(--navy);
  list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{content:"+";color:var(--amber);font-size:24px;font-weight:400;line-height:1;}
.faq details[open] summary::after{content:"−";}
.faq summary:hover{background:var(--soft);}
.faq .ans{padding:0 26px 22px;font-size:15.5px;color:var(--gray);line-height:1.9;}
.faq .ans b{color:var(--blue);}

/* ---------- 面包屑 ---------- */
.crumb{background:var(--soft);border-bottom:1px solid var(--line);padding:14px 0;font-size:14px;color:var(--gray);}
.crumb a{color:var(--gray);}
.crumb .sep{margin:0 8px;color:#B8C2D2;}

/* ---------- CTA ---------- */
.cta{background:var(--blue);color:#fff;padding:56px 0;text-align:center;}
.cta h2{font-size:28px;font-weight:800;margin-bottom:12px;}
.cta p{font-size:16px;color:#D5E4FB;margin-bottom:26px;}
.cta .btn-p{background:#fff;color:var(--blue);}
.cta .btn-p:hover{background:var(--amber);color:#12233F;}

/* ---------- 页脚 ---------- */
.ftr{background:#071529;color:#8FA3C8;padding:52px 0 26px;font-size:14.5px;}
.ftr .wrap{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:36px;}
.ftr h4{color:#fff;font-size:16px;margin-bottom:16px;font-weight:600;}
.ftr ul{list-style:none;}
.ftr ul li{margin-bottom:9px;}
.ftr a{color:#8FA3C8;}
.ftr a:hover{color:var(--amber);}
.ftr .btm{border-top:1px solid #16304F;margin-top:36px;padding-top:20px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13.5px;}
.ftr .logo{height:30px;background:#fff;border-radius:4px;padding:3px 8px;margin-bottom:16px;}

/* ---------- 联系方式卡 ---------- */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.contact-grid .card h3{font-size:14px;color:var(--gray);font-weight:600;letter-spacing:1px;
  text-transform:uppercase;margin-bottom:10px;}
.contact-grid .cval{font-size:17px;color:var(--navy);font-weight:700;line-height:1.65;
  word-break:break-word;display:block;}
.contact-grid a.cval:hover{color:var(--blue-2);text-decoration:underline;}
.contact-grid .cval.plain{font-size:15px;font-weight:500;color:#3A4457;line-height:1.8;}

/* ---------- 客户 logo 墙 ---------- */
.logos{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;}
.logos>div{background:#fff;border:1px solid var(--line);border-radius:10px;height:88px;
  display:flex;align-items:center;justify-content:center;padding:12px;transition:.2s;}
.logos>div:hover{border-color:var(--blue);box-shadow:0 6px 20px rgba(27,79,160,.09);}
.logos img{max-height:56px;width:auto;object-fit:contain;
  filter:grayscale(1);opacity:.78;transition:.25s;}
.logos>div:hover img{filter:none;opacity:1;}

/* ---------- 案例卡片 ---------- */
.cases{display:flex;flex-direction:column;gap:22px;}
.case{display:grid;grid-template-columns:88px 1fr;gap:26px;background:#fff;
  border:1px solid var(--line);border-radius:12px;padding:32px 34px;transition:.2s;}
.case:hover{border-color:var(--blue);box-shadow:0 10px 30px rgba(27,79,160,.09);}
.case .cno{font-size:44px;font-weight:800;color:var(--sky);line-height:1;
  -webkit-text-stroke:1px #C6D6EE;letter-spacing:-1px;}
.case .cbd{min-width:0;}
.case .ctag{display:inline-block;font-size:12.5px;letter-spacing:1.2px;color:var(--blue);
  background:var(--sky);border-radius:4px;padding:4px 12px;margin-bottom:14px;font-weight:600;}
.case h3{font-size:21px;color:var(--navy);font-weight:700;line-height:1.5;margin-bottom:12px;}
.case p{font-size:15.5px;color:var(--gray);line-height:1.9;margin-bottom:16px;}
.case .cfacts{list-style:none;display:grid;grid-template-columns:repeat(2,1fr);gap:8px 24px;}
.case .cfacts li{font-size:14.5px;color:#3A4457;padding-left:20px;position:relative;line-height:1.75;}
.case .cfacts li::before{content:"";position:absolute;left:2px;top:9px;width:6px;height:6px;
  border-radius:50%;background:var(--amber);}

/* ---------- 响应式 ---------- */
@media(max-width:900px){
  .nav{display:none;}
  .nav.show{display:flex;flex-direction:column;position:absolute;top:66px;left:0;right:0;
    background:var(--navy);padding:16px 24px;gap:16px;border-top:1px solid #2A3E63;}
  .burger{display:block;}
  .hero .wrap{grid-template-columns:1fr;gap:32px;}
  .hero h1{font-size:30px;}
  .hstats{grid-template-columns:1fr;gap:14px;}
  .grid3,.grid4,.metrics,.ftr .wrap{grid-template-columns:1fr;}
  .grid2{grid-template-columns:1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .sec{padding:52px 0;}
  .sechead h2{font-size:25px;}
  .bar{grid-template-columns:110px 1fr 90px;gap:10px;font-size:13px;}
  .bar .lb,.bar .vl{font-size:13px;}
  .logos{grid-template-columns:repeat(3,1fr);}
  .logos>div{height:74px;}
  .logos img{max-height:44px;}
  .case{grid-template-columns:1fr;gap:12px;padding:26px 22px;}
  .case .cno{font-size:34px;}
  .case .cfacts{grid-template-columns:1fr;}
  .case h3{font-size:19px;}
}