:root{
  --ink:#12263a;--primary:#14568c;--primary-d:#0e4470;--accent:#1d9e75;
  --muted:#5f6b7a;--line:#dde5ee;--soft:#f5f8fb;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#fff;color:var(--ink);font-size:15px;line-height:1.75;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
a{color:inherit;text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

/* ---------- 顶栏 ---------- */
.site-head{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);
  border-bottom:1px solid var(--line);backdrop-filter:saturate(180%) blur(8px)}
.head-inner{display:flex;align-items:center;gap:28px;min-height:68px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;
  border-radius:9px;background:var(--primary);color:#fff;font-size:17px;font-weight:700}
.logo-text{display:flex;flex-direction:column;line-height:1.25}
.logo-text strong{font-size:16px;font-weight:700;letter-spacing:.3px}
.logo-text em{font-style:normal;font-size:10px;color:var(--muted);letter-spacing:.6px}
.site-nav{display:flex;gap:26px;margin-left:auto;font-size:14px;color:var(--muted)}
.site-nav a:hover{color:var(--primary)}
.staff-login{display:inline-flex;align-items:center;gap:7px;flex:0 0 auto;
  padding:8px 16px;border:1px solid var(--primary);border-radius:999px;
  font-size:13px;color:var(--primary);font-weight:500;transition:background .15s,color .15s}
.staff-login:hover{background:var(--primary);color:#fff}
.staff-login .dot{width:6px;height:6px;border-radius:50%;background:var(--accent)}
.staff-login:hover .dot{background:#fff}

/* ---------- 首屏 ---------- */
.hero{background:var(--primary);color:#fff;padding:88px 0 92px}
.hero h1{font-size:44px;line-height:1.3;margin:0 0 20px;font-weight:700;letter-spacing:.5px}
.hero .lead{font-size:19px;margin:0 0 10px;color:#cfe2f2;letter-spacing:1px}
.hero .sub{margin:0 0 32px;font-size:15px;color:#a9c6de;max-width:560px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 26px;
  border-radius:8px;font-size:14px;transition:background .15s,color .15s,border-color .15s}
.btn-solid{background:#fff;color:var(--primary);font-weight:600}
.btn-solid:hover{background:#e8f1f8}
.btn-line{border:1px solid rgba(255,255,255,.5);color:#fff}
.btn-line:hover{background:rgba(255,255,255,.12)}

/* ---------- 通用区块 ---------- */
.section{padding:76px 0}
.section-alt{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{margin-bottom:36px}
.section-head h2{font-size:26px;margin:0 0 8px;font-weight:700}
.section-head p{margin:0;color:var(--muted);font-size:14px}
.section h2{font-size:26px;margin:0 0 18px;font-weight:700}
.muted{color:var(--muted)}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{border:1px solid var(--line);border-radius:12px;padding:26px 24px;background:#fff}
.card-no{display:inline-block;font-size:12px;color:var(--accent);font-weight:700;letter-spacing:1px;margin-bottom:12px}
.card h3{font-size:17px;margin:0 0 10px;font-weight:600}
.card p{margin:0;color:var(--muted);font-size:14px;line-height:1.8}

/* ---------- 服务网络 ---------- */
.network{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
.network p{margin:0 0 12px;color:var(--muted)}
.chips{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:10px}
.chips li{padding:7px 14px;background:#fff;border:1px solid var(--line);
  border-radius:999px;font-size:13px;color:var(--primary)}

/* ---------- 关于 ---------- */
.about{max-width:820px}
.about p{margin:0 0 14px;color:#3b4a5a;line-height:1.9}

/* ---------- 联系 ---------- */
.section-contact{background:var(--soft);border-top:1px solid var(--line)}
.contact{display:grid;grid-template-columns:.8fr 1.2fr;gap:40px}
.contact-list{margin:0;display:grid;gap:20px}
.contact-list dt{font-size:12px;color:var(--muted);letter-spacing:.5px;margin-bottom:4px}
.contact-list dd{margin:0;font-size:15px}
.contact-list .tel{font-size:26px;font-weight:700;color:var(--primary);letter-spacing:.5px}

/* ---------- 页脚 ---------- */
.site-foot{border-top:1px solid var(--line);padding:24px 0;background:#fff}
.foot-inner{display:flex;justify-content:center;align-items:center;gap:16px;
  font-size:13px;color:var(--muted);flex-wrap:wrap;text-align:center}
.foot-inner a:hover{color:var(--primary)}
/* 页脚单行居中：备案号在前，公司名在后 */
.foot-line{display:inline-flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap}
.foot-line .icp{color:var(--muted);text-decoration:none}
.foot-line .icp:hover{color:var(--primary);text-decoration:underline}

/* ---------- 响应式 ---------- */
@media(max-width:900px){
  .cards{grid-template-columns:1fr}
  .network,.contact{grid-template-columns:1fr;gap:24px}
  .hero{padding:64px 0 68px}
  .hero h1{font-size:32px}
  .site-nav{display:none}
  .head-inner{gap:12px;min-height:60px}
  .section{padding:52px 0}
}
@media(max-width:480px){
  .logo-text em{display:none}
  .staff-login{padding:7px 12px;font-size:12px}
  .hero h1{font-size:27px}
  .contact-list .tel{font-size:22px}
}