/* ===== 上海英柏检测技术有限公司 官网样式 ===== */
:root{
  --primary:#1a56db;
  --primary-dark:#143fa0;
  --accent:#00b4d8;
  --ink:#0f1b2d;
  --text:#2b3445;
  --muted:#6b7686;
  --line:#e6eaf0;
  --bg:#ffffff;
  --bg-soft:#f5f7fa;
  --bg-deep:#0f1b2d;
  --radius:14px;
  --shadow:0 8px 30px rgba(15,27,45,.08);
  --maxw:1180px;
  --header-h:68px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
  color:var(--text);background:var(--bg);line-height:1.7;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.en{font-size:.72em;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);font-weight:600}
.section{padding:84px 0}
.section.soft{background:var(--bg-soft)}
.section-title{font-size:30px;font-weight:800;color:var(--ink);margin-bottom:8px}
.section-sub{color:var(--muted);margin-bottom:40px;max-width:640px}

/* ===== Header ===== */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header .wrap{display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);font-size:19px}
.logo .mark{width:32px;height:32px;border-radius:8px;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;color:#fff;font-size:15px;font-weight:800}
.logo small{display:block;font-size:11px;color:var(--muted);font-weight:600;letter-spacing:.05em}
.nav{display:flex;align-items:center;gap:28px}
.nav a{font-weight:600;color:var(--text);font-size:15px;position:relative;padding:6px 0}
.nav a:hover,.nav a.active{color:var(--primary)}
.nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;border-radius:2px;background:var(--primary)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 10px;cursor:pointer;font-size:18px}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:10px;font-weight:700;font-size:15px;cursor:pointer;border:1px solid transparent;transition:.2s}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-ghost:hover{background:var(--primary);color:#fff}
.btn-light{background:#fff;color:var(--primary)}
.btn-light:hover{background:var(--bg-soft)}

/* ===== Hero ===== */
.hero{position:relative;color:#fff;overflow:hidden;background:linear-gradient(135deg,#0f1b2d 0%,#1a3a8f 60%,#00b4d8 140%)}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(0,180,216,.35),transparent 45%);pointer-events:none}
.hero .wrap{position:relative;z-index:1;padding:96px 24px 110px}
.hero h1{font-size:44px;line-height:1.25;font-weight:800;max-width:760px}
.hero p{font-size:19px;opacity:.92;margin:20px 0 34px;max-width:620px}
.hero .actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:46px;margin-top:54px;flex-wrap:wrap}
.hero-stats .n{font-size:34px;font-weight:800}
.hero-stats .l{font-size:14px;opacity:.85}

/* ===== Quick entries ===== */
.quick{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:-46px;position:relative;z-index:2}
.quick a{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:6px;transition:.2s}
.quick a:hover{transform:translateY(-4px);border-color:var(--primary)}
.quick .qi{font-size:22px}
.quick .qt{font-weight:700;color:var(--ink)}
.quick .qe{font-size:12px;letter-spacing:.1em;color:var(--accent);text-transform:uppercase}

/* ===== Cards / Grid ===== */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow);transition:.2s}
.card:hover{transform:translateY(-4px)}
.card .ic{width:50px;height:50px;border-radius:12px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.card h3{font-size:20px;color:var(--ink);margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}
.card .more{display:inline-block;margin-top:14px;color:var(--primary);font-weight:700;font-size:14px}

/* ===== Service list ===== */
.svc{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:8px}
.svc li{list-style:none;background:var(--bg-soft);border:1px solid var(--line);border-radius:10px;padding:14px 16px;font-size:15px;color:var(--text);display:flex;gap:10px;align-items:flex-start}
.svc li::before{content:"✓";color:var(--primary);font-weight:800}
.svc-full{grid-template-columns:repeat(3,1fr)}

/* ===== About ===== */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
img.about-figure{width:100%;height:auto;display:block;border-radius:var(--radius);border:1px solid var(--line);box-shadow:0 6px 22px rgba(20,40,80,.10)}
.about-figure::after{content:"实验室 / 办公实景 占位图";position:absolute;bottom:14px;right:16px;font-size:12px;opacity:.8}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:48px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;text-align:center;box-shadow:var(--shadow)}
.stat .n{font-size:38px;font-weight:800;color:var(--primary);line-height:1}
.stat .l{color:var(--muted);margin-top:8px;font-size:14px}

/* ===== Clients ===== */
.clients{display:flex;flex-wrap:wrap;gap:14px;margin-top:18px}
.clients span{border:1px dashed var(--line);border-radius:10px;padding:10px 18px;color:var(--muted);font-weight:600;font-size:14px}

/* ===== News ===== */
.news-item{display:flex;gap:20px;padding:22px 0;border-bottom:1px solid var(--line)}
.news-item .date{color:var(--accent);font-weight:700;font-size:14px;min-width:90px}
.news-item h4{font-size:17px;color:var(--ink);margin-bottom:4px}
.news-item p{color:var(--muted);font-size:14px}

/* ===== Forms ===== */
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px}
.field label{display:block;font-weight:600;color:var(--ink);margin-bottom:6px;font-size:14px}
.field input,.field textarea,.field select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;color:var(--text);background:#fff}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--primary)}
.field textarea{min-height:130px;resize:vertical}
.note{font-size:13px;color:var(--muted);background:var(--bg-soft);border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin-bottom:18px}

/* ===== Contact ===== */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px}
.info-block{display:flex;gap:14px;margin-bottom:22px}
.info-block .ic{width:42px;height:42px;border-radius:10px;background:var(--bg-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.info-block .t{font-weight:700;color:var(--ink)}
.info-block .v{color:var(--muted);font-size:15px}
.map{aspect-ratio:16/9;border-radius:var(--radius);overflow:hidden;background:#dfe6ef;border:1px solid var(--line)}
.map img{width:100%;height:100%;object-fit:cover;display:block}

/* ===== Footer ===== */
.footer{background:var(--bg-deep);color:#c8d2e0;padding:56px 0 28px}
.footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px}
.footer h5{color:#fff;font-size:15px;margin-bottom:16px}
.footer a{display:block;color:#9fb0c7;font-size:14px;padding:5px 0}
.footer a:hover{color:#fff}
.footer .brand{font-size:18px;font-weight:800;color:#fff;margin-bottom:12px;display:flex;align-items:center;gap:10px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:40px;padding-top:20px;font-size:13px;color:#7e8ba3;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ===== Breadcrumb ===== */
.crumb{padding:18px 0;color:var(--muted);font-size:14px}
.crumb a:hover{color:var(--primary)}

/* ===== Responsive ===== */
@media(max-width:900px){
  .nav{position:fixed;top:var(--header-h);left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0;padding:10px 24px 20px;transform:translateY(-120%);transition:.25s;box-shadow:var(--shadow)}
  .nav.open{transform:translateY(0)}
  .nav a{padding:12px 0;border-bottom:1px solid var(--line)}
  .nav a::after{display:none}
  .nav-toggle{display:block}
  .quick{grid-template-columns:repeat(2,1fr);margin-top:24px}
  .grid-2,.grid-3,.about-grid,.contact-grid,.svc,.svc-full{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  .section{padding:56px 0}
  .stats{grid-template-columns:1fr}
  .footer .cols{grid-template-columns:1fr 1fr}
  .form-row{grid-template-columns:1fr}
}