/* =========================================================
   涔润生物 CENRUN BIO · 企业官网设计系统
   品牌蓝 #0070C0 / 深蓝 #0C447C · 白色基底 · 分子几何
   ========================================================= */
:root{
  --blue:#0070C0;
  --blue-deep:#0C447C;
  --blue-soft:#4DA3E0;
  --cyan:#16B5C4;
  --ink:#16202b;
  --body:#46566a;
  --muted:#7b8a9a;
  --line:#e4ecf3;
  --soft:#f4f8fc;
  --soft-2:#eef4fa;
  --white:#fff;
  --radius:16px;
  --shadow-sm:0 6px 18px rgba(12,68,124,.06);
  --shadow:0 16px 44px rgba(12,68,124,.10);
  --shadow-lg:0 28px 70px rgba(12,68,124,.16);
  --maxw:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--body);background:var(--white);line-height:1.75;
  -webkit-font-smoothing:antialiased;font-size:16px;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 28px}
h1,h2,h3,h4{color:var(--ink);line-height:1.25;font-weight:800;letter-spacing:.2px}
.muted{color:var(--muted)}

/* ---------- 顶栏 ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.86);
  backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:20px;color:var(--blue-deep);letter-spacing:.5px}
.brand .logo-img{height:46px;width:auto;flex:0 0 auto}
.logo-chip{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;background:#fff;flex:0 0 44px;box-shadow:0 4px 14px rgba(0,0,0,.18)}
.logo-chip img{width:32px;height:32px;object-fit:contain}
.menu{display:flex;align-items:center;gap:4px}
.menu a{padding:9px 15px;border-radius:9px;font-size:15px;font-weight:600;color:var(--body);transition:.2s}
.menu a:hover{color:var(--blue);background:var(--soft)}
.menu a.active{color:var(--blue-deep)}
.menu .cta{background:linear-gradient(135deg,var(--blue),var(--blue-deep));color:#fff;
  border-radius:999px;padding:9px 20px;box-shadow:var(--shadow-sm)}
.menu .cta:hover{filter:brightness(1.06);color:#fff}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;font-size:24px;color:var(--blue-deep)}

/* ---------- 通用区块 ---------- */
.section{padding:96px 0}
.section.soft{background:var(--soft)}
.section.deep{background:linear-gradient(160deg,var(--blue-deep),#0a3a6b 60%,#072c52)}
.section.deep h2,.section.deep h3,.section.deep p{color:#fff}
.section-head{max-width:720px;margin:0 auto 56px;text-align:center}
.kicker{display:inline-block;font-size:13px;font-weight:800;letter-spacing:3px;
  color:var(--blue);text-transform:uppercase;margin-bottom:14px}
.section-head h2{font-size:34px;margin-bottom:14px}
.section-head p{font-size:17px;color:var(--muted)}
.divider{width:54px;height:4px;border-radius:4px;background:linear-gradient(90deg,var(--blue),var(--cyan));margin:18px auto 0}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:999px;
  font-weight:700;font-size:15px;cursor:pointer;border:0;transition:.22s;font-family:inherit}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--blue-deep));color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-ghost{background:#fff;color:var(--blue-deep);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn-light{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.35)}
.btn-light:hover{background:rgba(255,255,255,.24)}

/* ---------- HERO ---------- */
.hero{position:relative;overflow:hidden;
  background:radial-gradient(1200px 600px at 80% -10%,rgba(77,163,224,.35),transparent 60%),
             linear-gradient(160deg,#eaf3fb,#dcebf9 55%,#cfe3f6)}
  padding:84px 0 80px}
.hero .grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.hero-slogan{font-size:28px;font-weight:800;color:var(--blue-deep);letter-spacing:.5px;line-height:1.3;margin-bottom:24px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.hero .lead{font-size:16.5px;color:var(--body);margin:16px 0 26px;max-width:500px}
.hero h1{font-size:56px;line-height:1.1;color:var(--blue-deep);font-weight:800}
.hero h1 .hl{background:linear-gradient(120deg,var(--blue),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px}
.hero-tags span{background:#fff;border:1px solid var(--line);color:var(--blue-deep);
  font-weight:700;font-size:13px;padding:8px 15px;border-radius:999px;box-shadow:var(--shadow-sm)}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{position:relative;display:flex;justify-content:center;align-items:center;min-height:340px}
.hero-visual svg{width:100%;max-width:420px;filter:drop-shadow(0 30px 60px rgba(12,68,124,.25))}
.building-card{position:relative;width:100%;max-width:560px;border-radius:26px;overflow:hidden;box-shadow:0 34px 70px rgba(12,68,124,.28);border:1px solid rgba(255,255,255,.7)}
.building-card::after{content:"";position:absolute;left:0;right:0;bottom:0;height:42%;background:linear-gradient(180deg,rgba(12,68,124,0) 0%,rgba(12,68,124,.35) 100%)}
.building-img{display:block;width:100%;height:380px;object-fit:cover}

/* 核心优势 图文卡片 */
.feature-banner{position:relative;border-radius:26px;overflow:hidden;min-height:300px;display:flex;align-items:flex-end;box-shadow:0 26px 60px rgba(12,68,124,.22)}
.feature-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.feature-mask{position:absolute;inset:0;background:linear-gradient(180deg,rgba(12,68,124,.12) 0%,rgba(12,68,124,.82) 100%)}
.feature-text{position:relative;z-index:2;padding:42px 46px;color:#fff}
.feature-text h2{color:#fff;font-size:42px;margin:8px 0 12px}
.feature-text p{color:#dcebf8;max-width:640px;font-size:16px}
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px}
.adv-card{background:#fff;border:1px solid rgba(12,68,124,.1);border-radius:18px;overflow:hidden;box-shadow:0 14px 34px rgba(12,68,124,.07);transition:transform .35s ease,box-shadow .35s ease}
.adv-card:hover{transform:translateY(-6px);box-shadow:0 26px 54px rgba(12,68,124,.16)}
.adv-photo{position:relative;height:184px;overflow:hidden}
.adv-photo img{width:100%;height:100%;object-fit:cover;transition:transform .55s ease}
.adv-card:hover .adv-photo img{transform:scale(1.06)}
.adv-num{position:absolute;left:14px;top:14px;z-index:2;background:rgba(0,112,192,.86);color:#fff;font-weight:800;font-size:14px;letter-spacing:.05em;padding:5px 12px;border-radius:999px;backdrop-filter:blur(3px)}
.adv-card h3{padding:18px 20px 6px;font-size:19px;color:var(--blue-deep)}
.adv-card p{padding:0 20px 22px;color:var(--body);font-size:14.5px;line-height:1.72}
@media (max-width:900px){.adv-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.adv-grid{grid-template-columns:1fr}.feature-text{padding:30px 24px}.feature-text h2{font-size:32px}}

/* 业务板块 大图导航 */
.blocks{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:8px}
.block{position:relative;border-radius:22px;overflow:hidden;min-height:260px;display:flex;align-items:flex-end;text-decoration:none;box-shadow:0 16px 42px rgba(12,68,124,.14);transition:transform .4s ease,box-shadow .4s ease}
.block:hover{transform:translateY(-6px);box-shadow:0 28px 60px rgba(12,68,124,.22)}
.block img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.block:hover img{transform:scale(1.06)}
.block::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(12,68,124,.08) 0%,rgba(12,68,124,.82) 100%)}
.block .b-text{position:relative;z-index:2;padding:28px 30px;color:#fff}
.block .b-text h3{color:#fff;font-size:24px;margin-bottom:8px}
.block .b-text p{color:#dcebf8;font-size:14.5px;line-height:1.6}
.block .arrow{display:inline-block;margin-top:12px;font-size:14px;font-weight:600;color:#fff;opacity:.92}
@media (max-width:760px){.blocks{grid-template-columns:1fr}.block{min-height:200px}}
.mol-bg{position:absolute;inset:0;pointer-events:none;opacity:.5}

/* ---------- 数据条 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:64px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;text-align:center;box-shadow:var(--shadow-sm)}
.stat .n{font-size:36px;font-weight:800;color:var(--blue);line-height:1}
.stat .l{font-size:14px;color:var(--muted);margin-top:10px}

/* ---------- 卡片网格 ---------- */
.cards{display:grid;gap:24px}
.cards.c3{grid-template-columns:repeat(3,1fr)}
.cards.c2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;
  box-shadow:var(--shadow-sm);transition:.25s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.card .ic{width:52px;height:52px;margin-bottom:18px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{font-size:15px;color:var(--muted)}
.card .top-line{position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--blue),var(--cyan));opacity:0;transition:.25s}
.card:hover .top-line{opacity:1}

/* ---------- 业务矩阵 ---------- */
.matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.mx{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;box-shadow:var(--shadow-sm)}
.mx .tag{font-size:12px;font-weight:800;letter-spacing:2px;color:var(--blue)}
.mx h3{font-size:20px;margin:8px 0 10px}
.mx p{font-size:14.5px;color:var(--muted)}

/* ---------- 时间线 ---------- */
.timeline{position:relative;max-width:820px;margin:0 auto;padding-left:28px}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--blue),var(--cyan))}
.tl-item{position:relative;padding:0 0 34px 26px}
.tl-item::before{content:"";position:absolute;left:-28px;top:4px;width:16px;height:16px;border-radius:50%;
  background:#fff;border:4px solid var(--blue);box-shadow:0 0 0 4px var(--soft)}
.tl-item .yr{font-weight:800;color:var(--blue);font-size:15px}
.tl-item h4{font-size:18px;margin:4px 0 6px;color:var(--ink)}
.tl-item p{font-size:14.5px;color:var(--muted)}

/* ---------- 双栏 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split .visual{background:linear-gradient(160deg,var(--blue),var(--blue-deep));border-radius:24px;
  min-height:360px;display:flex;align-items:center;justify-content:center;padding:30px;box-shadow:var(--shadow)}
.split h2{font-size:30px;margin-bottom:16px}
.split p{font-size:16px;margin-bottom:14px;color:var(--body)}

/* CTA 联系卡 */
.cta-card{width:100%;max-width:460px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.22);
  border-radius:22px;padding:34px 34px 28px;backdrop-filter:blur(6px);box-shadow:0 24px 60px rgba(0,0,0,.25)}
.cta-card-head{display:flex;align-items:center;gap:14px;padding-bottom:20px;margin-bottom:20px;border-bottom:1px solid rgba(255,255,255,.18)}
.cta-card-head h3{color:#fff;font-size:21px;letter-spacing:.06em}
.cta-card-head small{display:block;color:#9fd3ea;font-size:12px;font-weight:700;letter-spacing:3px;margin-top:2px}
.cta-row{display:flex;gap:14px;align-items:flex-start;margin:14px 0}
.cta-row .k{flex:0 0 72px;color:#9fd3ea;font-size:14px;font-weight:700}
.cta-row .v{color:#fff;font-size:15px;font-weight:600;line-height:1.6}

/* ---------- 指标列表 ---------- */
.metric-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:8px}
.metric-list li{background:var(--soft-2);border-radius:12px;padding:16px 18px;font-size:14.5px;color:var(--ink);font-weight:600}
.metric-list li b{color:var(--blue)}

/* ---------- 客户/合作 ---------- */
.partners{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.partner{background:#fff;border:1px solid var(--line);border-radius:14px;height:84px;display:flex;align-items:center;justify-content:center;
  color:var(--muted);font-weight:700;font-size:14px;text-align:center;padding:10px;box-shadow:var(--shadow-sm);transition:.2s}
.partner:hover{color:var(--blue);border-color:var(--blue-soft)}

/* ---------- 表单 ---------- */
.form-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:36px;box-shadow:var(--shadow)}
.form-card label{display:block;font-size:13px;font-weight:700;color:var(--body);margin:16px 0 7px}
.form-card input,.form-card textarea{width:100%;border:1px solid var(--line);border-radius:11px;padding:12px 14px;font-size:15px;font-family:inherit;color:var(--ink);background:var(--soft)}
.form-card input:focus,.form-card textarea:focus{outline:none;border-color:var(--blue);background:#fff}
.info-card{background:linear-gradient(160deg,var(--blue),var(--blue-deep));color:#fff;border-radius:22px;padding:40px;box-shadow:var(--shadow)}
.info-card h3{color:#fff;margin-bottom:20px;font-size:22px}
.info-row{display:flex;gap:14px;margin:16px 0;align-items:flex-start}
.info-row .k{font-weight:700;min-width:62px;opacity:.8}
.info-row .v{opacity:.95}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--blue-deep);color:#cfe0f0;padding:64px 0 28px;font-size:14.5px}
.footer-cols{display:grid;grid-template-columns:1.5fr .9fr .9fr 1.2fr auto;gap:36px}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.site-footer a{color:#bcd4ea;display:block;margin:8px 0;transition:.2s}
.site-footer a:hover{color:#fff}
.footer-brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:19px;color:#fff;margin-bottom:14px}
.footer-brand .logo-chip{width:40px;height:40px;flex:0 0 40px;box-shadow:none}
.footer-brand .logo-chip img{width:30px;height:30px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:44px;padding-top:22px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:#9fb8d2;font-size:13px}
.footer-bottom a{display:inline;margin:0 8px;color:#9fb8d2}
.footer-qr img{display:block;width:118px;height:118px;background:#fff;border-radius:12px;padding:6px}
.footer-qr p{color:#9fb8d2;font-size:12.5px;line-height:1.55;margin-top:9px;max-width:132px}
.qr-inline{display:flex;align-items:center;gap:18px;margin-top:24px;background:rgba(255,255,255,.1);border-radius:14px;padding:14px 18px}
.qr-inline img{width:104px;height:104px;background:#fff;border-radius:8px;padding:4px;flex:0 0 104px}
.qr-inline .t{font-size:14px;line-height:1.65;opacity:.95}
@media(max-width:640px){.footer-qr p{max-width:none}}

/* ---------- 滚动揭示 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}
.reveal.d4{transition-delay:.32s}.reveal.d5{transition-delay:.4s}.reveal.d6{transition-delay:.48s}

/* ---------- 响应式 ---------- */
@media(max-width:980px){
  .hero .grid,.split{grid-template-columns:1fr}
  .hero-visual{order:-1;min-height:240px}
  .building-img{height:300px}
  .brand .logo-img{height:38px}
  .stats,.cards.c3,.matrix,.partners,.metric-list{grid-template-columns:repeat(2,1fr)}
  .cards.c2{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:1fr 1fr}
  .hero h1{font-size:40px}
  .hero-slogan{font-size:24px}
}
@media(max-width:640px){
  .menu{display:none}
  .section{padding:64px 0}
  .stats,.cards.c3,.matrix,.partners,.metric-list{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  .hero-slogan{font-size:22px}
  .section-head h2{font-size:27px}
}