:root{--c-primary:#2fa96b;--font:'Microsoft YaHei','PingFang SC',sans-serif;}
/* ============ 恒康生物疫苗 免疫细胞风 ============ */
:root {
  --green:#2fa96b;
  --green-d:#1f8a54;
  --blue:#2a7bd5;
  --blue-d:#1f5fb0;
  --white:#f4faf6;
  --dark:#1d3a2e;
  --text:#4f6a5c;
  --line:#d9e9df;
  --shadow:0 16px 38px rgba(47,169,107,.15);
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { font-family:"Microsoft YaHei","PingFang SC",sans-serif; color:var(--text); background:var(--white); overflow-x:hidden; font-size:17px; }
a { text-decoration:none; color:inherit; }
ul { list-style:none; }
img { max-width:100%; display:block; }
.container { max-width:1200px; margin:0 auto; padding:0 24px; }

/* ---------- 导航 ---------- */
.site-header { position:fixed; top:0; left:0; right:0; z-index:999; background:rgba(244,250,246,.96); backdrop-filter:blur(10px); box-shadow:0 2px 12px rgba(47,169,107,.14); }
.nav-wrap { display:flex; align-items:center; justify-content:space-between; height:78px; }
.logo { display:flex; align-items:center; gap:12px; }
.logo-cell { width:46px; height:46px; border-radius:50%; background:radial-gradient(circle at 30% 30%, #fff, #bfe8d3 55%, var(--green)); box-shadow:inset 0 0 0 6px rgba(47,169,107,.18), 0 6px 16px rgba(47,169,107,.3); position:relative; display:flex; align-items:center; justify-content:center; }
.logo-cell i { width:14px; height:14px; border-radius:50%; background:radial-gradient(circle at 35% 35%, #8fd6b1, var(--green-d)); box-shadow:0 0 10px rgba(47,169,107,.7); }
.logo-text { font-weight:800; font-size:21px; color:var(--dark); display:flex; flex-direction:column; line-height:1.15; }
.logo-text span { font-size:10px; font-weight:500; color:var(--blue); letter-spacing:2px; }
.main-nav { display:flex; gap:6px; }
.main-nav a { padding:11px 17px; border-radius:20px; font-size:16px; font-weight:600; color:var(--dark); transition:.3s; }
.main-nav a:hover { color:var(--green); background:#e8f6ee; }
.main-nav a.active { color:#fff; background:linear-gradient(135deg,var(--green),var(--blue)); box-shadow:0 8px 18px rgba(47,169,107,.3); }
.nav-toggle { display:none; flex-direction:column; gap:5px; background:none; border:none; cursor:pointer; padding:8px; }
.nav-toggle span { width:26px; height:3px; background:var(--dark); border-radius:2px; transition:.3s; }

/* ---------- 细胞背景 ---------- */
.cell-bg { position:absolute; inset:0; pointer-events:none; overflow:hidden; }
.cell { position:absolute; border-radius:50%; border:2px solid rgba(47,169,107,.22); background:radial-gradient(circle at 35% 30%, rgba(255,255,255,.7), rgba(207,237,221,.4) 45%, rgba(47,169,107,.12)); }
.cell::after { content:""; position:absolute; top:50%; left:50%; transform:translate(-50%,-50%); width:26%; height:26%; border-radius:50%; background:rgba(42,123,213,.35); }
.cell.c1 { width:130px; height:130px; top:12%; left:6%; }
.cell.c2 { width:70px; height:70px; top:34%; left:16%; }
.cell.c3 { width:100px; height:100px; top:70%; left:9%; }
.cell.c4 { width:60px; height:60px; top:16%; right:9%; }
.cell.c5 { width:110px; height:110px; top:58%; right:5%; }
.cell.c6 { width:46px; height:46px; top:44%; right:22%; }
.cell.c7 { width:80px; height:80px; bottom:10%; left:44%; }
.cell.c8 { width:50px; height:50px; bottom:6%; right:36%; }
@keyframes cellFloat { 0%,100%{ transform:translateY(0);} 50%{ transform:translateY(-12px);} }
.cell.c1,.cell.c3,.cell.c5,.cell.c7 { animation:cellFloat 6s ease-in-out infinite; }
.cell.c2,.cell.c4,.cell.c6,.cell.c8 { animation:cellFloat 7s ease-in-out infinite reverse; }

/* ---------- Hero ---------- */
.hero { position:relative; padding:170px 0 110px; background:linear-gradient(155deg,#e3f4ea 0%,var(--white) 55%,#e1eef9 100%); overflow:hidden; }
.hero-inner { position:relative; display:grid; grid-template-columns:.95fr 1.05fr; gap:56px; align-items:center; }
.hero-visual { position:relative; display:flex; align-items:center; justify-content:center; }
.big-cell { position:relative; width:330px; height:330px; border-radius:50%; background:radial-gradient(circle at 32% 28%, #fff, #bde6d0 50%, #6fc59b 75%, var(--green)); box-shadow:0 0 0 10px rgba(255,255,255,.6), 0 0 0 22px rgba(47,169,107,.14), 0 30px 60px rgba(47,169,107,.28); }
.cell-ring { position:absolute; border-radius:50%; border:2px solid rgba(47,169,107,.3); }
.big-cell .r1 { width:380px; height:380px; top:50%; left:50%; transform:translate(-50%,-50%); border-color:rgba(42,123,213,.25); animation:ringPulse 4s ease-in-out infinite; }
.big-cell .r2 { width:430px; height:430px; top:50%; left:50%; transform:translate(-50%,-50%); border-color:rgba(47,169,107,.18); animation:ringPulse 4s ease-in-out infinite reverse; }
@keyframes ringPulse { 0%,100%{ transform:translate(-50%,-50%) scale(1); opacity:.8;} 50%{ transform:translate(-50%,-50%) scale(1.06); opacity:1;} }
.nucleus { position:absolute; top:50%; left:50%; transform:translate(-50%,-50%); width:150px; height:150px; border-radius:50%; background:radial-gradient(circle at 35% 30%, #fff, #d9eef6 50%, #a7d4e8); box-shadow:0 10px 26px rgba(42,123,213,.35); }
.nucleus-dot { position:absolute; top:50%; left:50%; transform:translate(-50%,-50%); width:34px; height:34px; border-radius:50%; background:radial-gradient(circle at 35% 30%, #7fc3e8, var(--blue)); box-shadow:0 0 18px rgba(42,123,213,.6); }
.antibody { position:absolute; width:30px; height:58px; transform-origin:bottom center; animation:abWave 3.5s ease-in-out infinite; }
.antibody.ab1 { top:8px; left:26px; transform:rotate(28deg); }
.antibody.ab2 { top:10px; right:26px; transform:rotate(-28deg); animation-delay:1s; }
.ab-a,.ab-b,.ab-c { position:absolute; display:block; }
.ab-a { width:10px; height:34px; background:linear-gradient(90deg,var(--blue),#5fa4e8); border-radius:6px; left:10px; top:6px; }
.ab-b { width:10px; height:22px; background:var(--blue-d); border-radius:6px; left:0; top:0; transform:rotate(38deg); }
.ab-c { width:10px; height:22px; background:var(--blue-d); border-radius:6px; right:0; top:0; transform:rotate(-38deg); }
@keyframes abWave { 0%,100%{ margin-top:0;} 50%{ margin-top:-8px;} }
.microbe { position:absolute; border-radius:50%; background:rgba(255,255,255,.8); box-shadow:0 8px 20px rgba(47,169,107,.3); animation:cellFloat 5s ease-in-out infinite; }
.microbe.m1 { width:44px; height:44px; top:22%; right:12%; }
.microbe.m1::after { content:""; position:absolute; top:50%; left:50%; transform:translate(-50%,-50%); width:16px; height:16px; border-radius:50%; background:var(--green); }
.microbe.m2 { width:34px; height:34px; bottom:18%; left:10%; animation-delay:1s; }
.microbe.m2::after { content:""; position:absolute; top:50%; left:50%; transform:translate(-50%,-50%); width:12px; height:12px; border-radius:50%; background:var(--blue); }
.hero-tag { display:inline-block; padding:9px 22px; background:#fff; border-radius:24px; font-size:15px; color:var(--green); font-weight:700; box-shadow:0 6px 18px rgba(47,169,107,.16); margin-bottom:24px; }
.hero h1 { font-size:44px; line-height:1.35; color:var(--dark); font-weight:800; margin-bottom:22px; }
.hero h1 span { color:var(--green); position:relative; }
.hero h1 span::after { content:""; position:absolute; left:0; right:0; bottom:4px; height:12px; background:rgba(47,169,107,.2); border-radius:4px; z-index:-1; }
.hero-text p { font-size:18px; line-height:2; margin-bottom:32px; max-width:540px; }
.hero-actions { display:flex; gap:16px; }
.btn { display:inline-block; padding:15px 34px; border-radius:22px; font-weight:700; font-size:17px; transition:.3s; border:1px solid transparent; cursor:pointer; }
.btn-primary { background:linear-gradient(135deg,var(--green),var(--blue)); color:#fff; box-shadow:0 10px 24px rgba(47,169,107,.34); }
.btn-primary:hover { transform:translateY(-3px); box-shadow:0 16px 30px rgba(47,169,107,.44); }
.btn-outline { background:transparent; color:var(--green); border-color:var(--green); }
.btn-outline:hover { background:var(--green); color:#fff; }
.btn-light { background:#fff; color:var(--green); box-shadow:0 10px 24px rgba(0,0,0,.1); }
.btn-outline-light { background:transparent; border:1px solid rgba(255,255,255,.8); color:#fff; }
.btn-block { display:block; width:100%; text-align:center; }
.hero-meta { display:flex; align-items:center; gap:26px; margin-top:34px; flex-wrap:wrap; }
.hero-meta .shield-sm { width:44px; height:44px; border-radius:50%; background:#fff; display:flex; align-items:center; justify-content:center; font-size:22px; box-shadow:0 6px 16px rgba(47,169,107,.2); }
.hero-meta span:not(.shield-sm) { font-size:15px; color:var(--text); }
.hero-meta b { display:block; font-size:24px; color:var(--blue); font-weight:800; }

/* ---------- 细胞链分隔 ---------- */
.cell-chain { display:flex; align-items:center; justify-content:center; gap:22px; height:60px; background:linear-gradient(180deg,#e1eef9,#f0f7f2); }
.cell-chain span { width:16px; height:16px; border-radius:50%; background:linear-gradient(135deg,#6fc59b,var(--green)); position:relative; animation:chainPulse 3s ease-in-out infinite; }
.cell-chain span:nth-child(even) { background:linear-gradient(135deg,#7fb4ea,var(--blue)); animation-delay:.5s; }
.cell-chain span::after { content:""; position:absolute; top:50%; left:50%; transform:translate(-50%,-50%); width:50%; height:50%; border-radius:50%; background:#fff; }
.cell-chain.reverse { background:linear-gradient(180deg,#e3f4ea,#f0f7f2); }

@keyframes chainPulse { 0%,100%{ transform:scale(1);} 50%{ transform:scale(1.4);} }

/* ---------- 通用 Section ---------- */
.section { padding:96px 0; }
.section-head { text-align:center; max-width:680px; margin:0 auto 56px; }
.kicker { display:inline-block; font-size:15px; font-weight:700; letter-spacing:3px; color:var(--blue); margin-bottom:14px; }
.section-head h2 { font-size:40px; font-weight:800; color:var(--dark); margin-bottom:16px; line-height:1.35; }
.section-head h2 span { color:var(--green); }
.section-head p { font-size:17px; color:var(--text); opacity:.9; }

/* ---------- 免疫守护 ---------- */
.guard { background:linear-gradient(180deg,#f0f7f2,var(--white)); }
.guard-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:26px; }
.guard-card { background:#fff; border-radius:26px; padding:40px 26px; text-align:center; box-shadow:var(--shadow); transition:.35s; }
.guard-card:hover { transform:translateY(-8px); }
.guard-shield { display:inline-flex; width:74px; height:74px; border-radius:50%; background:linear-gradient(135deg,#e3f4ea,#e1eef9); align-items:center; justify-content:center; font-size:36px; margin-bottom:18px; box-shadow:inset 0 0 0 6px #fff; }
.guard-card h3 { font-size:21px; color:var(--dark); margin-bottom:12px; }
.guard-card p { font-size:15px; line-height:1.9; opacity:.88; }

/* ---------- 疫苗产品 ---------- */
.pipeline { background:var(--white); }
.vax-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:40px; }
.vax-card { background:#fff; border-radius:26px; padding:34px 28px; box-shadow:var(--shadow); transition:.35s; border-bottom:5px solid transparent; }
.vax-card:hover { transform:translateY(-8px); border-bottom-color:var(--green); }
.vax-top { display:flex; align-items:center; justify-content:space-between; margin-bottom:20px; }
.bottle { display:inline-flex; flex-direction:column; align-items:center; gap:2px; width:64px; }
.bottle i { display:block; width:26px; height:40px; border-radius:50% 50% 6px 6px / 40% 40% 6px 6px; background:linear-gradient(180deg,#d9f0e4,var(--green)); border:3px solid var(--green-d); position:relative; box-shadow:0 6px 14px rgba(47,169,107,.28); }
.bottle i::before { content:""; position:absolute; top:-10px; left:50%; transform:translateX(-50%); width:10px; height:10px; border-radius:50% 50% 3px 3px; background:var(--green-d); }
.bottle i::after { content:""; position:absolute; top:18px; left:50%; transform:translateX(-50%); width:12px; height:12px; border-radius:50%; background:rgba(255,255,255,.6); }
.bottle b { font-size:11px; color:var(--green); letter-spacing:1px; }
.vax-badge { display:inline-block; font-size:13px; font-weight:800; padding:7px 18px; border-radius:20px; }
.vax-card:nth-child(1) .vax-badge,.vax-card:nth-child(2) .vax-badge,.vax-card:nth-child(3) .vax-badge { background:#e3f4ea; color:var(--green); }
.vax-card:nth-child(4) .vax-badge { background:#e8effb; color:var(--blue); }
.vax-card:nth-child(5) .vax-badge { background:#eef3e4; color:#8a9b2a; }
.vax-card:nth-child(6) .vax-badge { background:#f4e4e4; color:#b04a4a; }
.vax-card h3 { font-size:20px; color:var(--dark); margin-bottom:12px; line-height:1.5; }
.vax-card p { font-size:15px; line-height:1.9; opacity:.88; margin-bottom:16px; }
.vax-foot { display:inline-block; font-size:13px; font-weight:700; color:var(--blue); background:#eef4fc; padding:8px 18px; border-radius:20px; }
.center-btn { text-align:center; margin-top:46px; }

/* ---------- 研发 ---------- */
.rd { background:linear-gradient(180deg,#f0f7f2,#fff); }
.rd-grid { display:grid; grid-template-columns:1.1fr 1fr; gap:50px; align-items:center; }
.rd-visual { position:relative; }
.rd-visual img { width:100%; height:400px; object-fit:cover; border-radius:26px; box-shadow:var(--shadow); }
.rd-cap { position:absolute; left:20px; bottom:20px; right:20px; background:rgba(255,255,255,.92); border-radius:18px; padding:18px 22px; }
.rd-cap b { display:block; font-size:18px; color:var(--dark); margin-bottom:4px; }
.rd-cap span { font-size:14px; color:var(--text); }
.rd-list { display:flex; flex-direction:column; gap:20px; }
.rd-item { display:flex; gap:18px; background:#fff; border-radius:20px; padding:24px 26px; box-shadow:var(--shadow); transition:.3s; }
.rd-item:hover { transform:translateX(6px); }
.rd-dot { flex:0 0 18px; width:18px; height:18px; margin-top:5px; border-radius:50%; background:radial-gradient(circle at 35% 30%, #8fd6b1, var(--green)); box-shadow:0 0 0 6px rgba(47,169,107,.16); }
.rd-item h3 { font-size:18px; color:var(--dark); margin-bottom:6px; }
.rd-item p { font-size:15px; line-height:1.8; opacity:.9; }

/* ---------- 新闻 ---------- */
.news { background:#fff; }
.news-row { display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }
.news-card { background:var(--white); border-radius:24px; overflow:hidden; box-shadow:var(--shadow); transition:.35s; }
.news-card:hover { transform:translateY(-6px); }
.news-card img { width:100%; height:200px; object-fit:cover; }
.news-body { padding:26px; }
.news-body time { font-size:14px; color:var(--green); font-weight:700; }
.news-body h3 { font-size:19px; color:var(--dark); margin:12px 0; line-height:1.6; }
.news-body p { font-size:15px; line-height:1.9; opacity:.88; }

/* ---------- CTA ---------- */
.cta-cell { background:linear-gradient(135deg,var(--green),#1f8a54 50%,var(--blue)); border-radius:30px; padding:60px; text-align:center; color:#fff; position:relative; overflow:hidden; box-shadow:0 24px 50px rgba(47,169,107,.34); }
.cta-cell .cell-ring { border-color:rgba(255,255,255,.2); }
.cta-cell .r1 { width:220px; height:220px; top:-90px; left:-60px; position:absolute; transform:none; }
.cta-cell .r2 { width:300px; height:300px; bottom:-140px; right:-80px; position:absolute; transform:none; }
.cta-cell h2 { font-size:34px; font-weight:800; margin-bottom:16px; position:relative; }
.cta-cell p { font-size:17px; opacity:.95; margin-bottom:32px; position:relative; }
.cta-actions { display:flex; gap:16px; justify-content:center; position:relative; }

/* ---------- 页脚 ---------- */
.site-footer { background:var(--dark); color:#c8dccf; padding:60px 0 0; }
.footer-grid { display:grid; grid-template-columns:1.4fr 1fr 1.2fr; gap:40px; padding-bottom:36px; }
.footer-brand h3 { font-size:21px; color:#fff; margin-bottom:14px; }
.footer-brand p { font-size:16px; line-height:1.9; opacity:.85; }
.footer-links h4 { font-size:17px; color:#fff; margin-bottom:16px; }
.footer-links a { display:block; font-size:16px; padding:7px 0; opacity:.85; transition:.3s; }
.footer-links a:hover { color:#9ee0bd; padding-left:6px; }
.footer-links p { font-size:16px; padding:5px 0; opacity:.85; line-height:1.8; }
.footer-bottom { border-top:1px solid rgba(255,255,255,.14); padding:20px 0; text-align:center; font-size:14px; opacity:.75; }

/* ---------- 内页 ---------- */
.page-hero { position:relative; padding:170px 0 84px; text-align:center; background:linear-gradient(160deg,#e3f4ea,var(--white)); overflow:hidden; }
.page-hero .container { position:relative; }
.page-hero .kicker { color:var(--blue); }
.page-hero h1 { font-size:44px; color:var(--dark); font-weight:800; margin:8px 0 16px; }
.page-hero h1 span { color:var(--green); }
.page-hero p { font-size:18px; color:var(--text); opacity:.9; }

/* about */
.about-grid { display:grid; grid-template-columns:1fr 1.1fr; gap:56px; align-items:center; }
.about-img { position:relative; }
.about-img img { width:100%; height:430px; object-fit:cover; border-radius:26px; box-shadow:var(--shadow); }
.img-badge { position:absolute; top:20px; left:20px; background:#fff; color:var(--green); font-weight:800; padding:10px 22px; border-radius:24px; box-shadow:0 8px 20px rgba(0,0,0,.18); }
.about-text h2 { font-size:32px; color:var(--dark); margin-bottom:18px; }
.about-text h2 span { color:var(--green); }
.about-text p { font-size:17px; line-height:2; margin-bottom:16px; }
.about-note { background:#fff; border-radius:20px; padding:24px; border-left:6px solid var(--green); margin-top:18px; box-shadow:var(--shadow); }
.about-note p { margin:0; }

/* team */
.team-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:30px; max-width:860px; margin:0 auto; }
.team-card { background:#fff; border-radius:24px; overflow:hidden; box-shadow:var(--shadow); transition:.35s; display:grid; grid-template-columns:200px 1fr; }
.team-card:hover { transform:translateY(-6px); }
.team-card img { width:100%; height:100%; min-height:240px; object-fit:cover; }
.team-body { padding:30px; }
.team-body h3 { font-size:21px; color:var(--dark); margin-bottom:6px; }
.team-body span { font-size:14px; color:var(--blue); font-weight:700; }
.team-body p { font-size:15px; line-height:1.9; margin-top:14px; opacity:.9; }

/* CSR */
.csr-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }
.csr-card { text-align:center; background:#fff; border-radius:26px; padding:40px 26px; box-shadow:var(--shadow); transition:.35s; }
.csr-card:hover { transform:translateY(-6px); }
.csr-ic { display:inline-flex; width:70px; height:70px; border-radius:50%; background:linear-gradient(135deg,#e3f4ea,#e1eef9); align-items:center; justify-content:center; font-size:34px; margin-bottom:18px; }
.csr-card h3 { font-size:20px; color:var(--dark); margin-bottom:12px; }
.csr-card p { font-size:15px; line-height:1.9; opacity:.88; }

/* products 管线 */
.rnd-list { max-width:900px; margin:0 auto; }
.rnd-item { display:grid; grid-template-columns:150px 1fr 180px; gap:20px; align-items:center; background:#fff; border-radius:22px; padding:22px 34px; box-shadow:var(--shadow); margin-bottom:20px; }
.rnd-item h3 { font-size:18px; color:var(--dark); margin-bottom:6px; }
.rnd-item div p { font-size:15px; line-height:1.8; opacity:.88; }
.rnd-stage { text-align:center; font-size:14px; font-weight:800; padding:10px 0; border-radius:20px; }
.stage1 { background:#f4e4e4; color:#b04a4a; }
.stage2 { background:#eef3e4; color:#8a9b2a; }
.stage3 { background:#e8effb; color:var(--blue); }
.rnd-prog { height:12px; background:var(--line); border-radius:6px; overflow:hidden; }
.rnd-prog i { display:block; height:100%; background:linear-gradient(90deg,var(--green),var(--blue)); border-radius:6px; }

/* news grid */
.news-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }

/* contact */
.contact-wrap { display:grid; grid-template-columns:1fr 1.15fr; gap:50px; align-items:start; }
.ct-card { display:flex; gap:16px; padding:20px; background:#fff; border-radius:20px; box-shadow:var(--shadow); margin-bottom:18px; }
.ct-cell { width:56px; height:56px; border-radius:50%; background:radial-gradient(circle at 30% 30%, #fff, #d9f0e4 55%, var(--green)); display:flex; align-items:center; justify-content:center; font-size:24px; flex:0 0 56px; box-shadow:inset 0 0 0 5px rgba(47,169,107,.15); }
.ct-card h4 { font-size:18px; color:var(--dark); margin-bottom:6px; }
.ct-card p { font-size:15px; opacity:.9; line-height:1.7; }
.map-box { border-radius:20px; overflow:hidden; box-shadow:var(--shadow); }
.map-box img { width:100%; height:220px; object-fit:cover; }
.form-box { background:#fff; border-radius:26px; padding:40px; box-shadow:var(--shadow); }
.form-box h3 { font-size:24px; color:var(--dark); margin-bottom:26px; }
.form-grid { display:grid; grid-template-columns:1fr 1fr; gap:18px; }
.form-field { margin-bottom:18px; }
.form-field label { display:block; font-size:15px; font-weight:700; color:var(--dark); margin-bottom:8px; }
.form-field input,.form-field select,.form-field textarea { width:100%; padding:14px 16px; border:1px solid var(--line); border-radius:14px; font-size:15px; font-family:inherit; background:#f7fcf9; transition:.3s; outline:none; }
.form-field textarea { min-height:120px; resize:vertical; }
.form-field input:focus,.form-field select:focus,.form-field textarea:focus { border-color:var(--green); box-shadow:0 0 0 3px rgba(47,169,107,.14); background:#fff; }
.form-field.full { grid-column:span 2; }
.form-error { color:#e0485a; font-size:14px; margin-top:6px; display:none; }
.form-field.error input,.form-field.error textarea,.form-field.error select { border-color:#e0485a; }
.form-field.error .form-error { display:block; }
.form-success { display:none; text-align:center; padding:30px 0; color:var(--green); font-size:18px; font-weight:700; }
.form-success .ok-icon { font-size:52px; display:block; margin-bottom:12px; }

/* reveal */
.reveal { opacity:0; transform:translateY(34px); transition:opacity .8s ease, transform .8s ease; }
.reveal.visible { opacity:1; transform:none; }

/* ---------- 响应式 ---------- */
@media (max-width:992px){
  .hero-inner { grid-template-columns:1fr; text-align:center; }
  .hero-visual { order:-1; }
  .big-cell { width:240px; height:240px; }
  .big-cell .r1 { width:290px; height:290px; }
  .big-cell .r2 { width:330px; height:330px; }
  .nucleus { width:120px; height:120px; }
  .hero-text p { margin:0 auto 32px; }
  .hero-actions { justify-content:center; }
  .hero-meta { justify-content:center; }
  .guard-grid { grid-template-columns:repeat(2,1fr); }
  .vax-grid,.news-row,.news-grid { grid-template-columns:repeat(2,1fr); }
  .rd-grid { grid-template-columns:1fr; }
  .contact-wrap,.about-grid { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr 1fr; }
  .rnd-item { grid-template-columns:130px 1fr; }
  .rnd-prog { grid-column:span 2; }
}
@media (max-width:768px){
  .main-nav { position:fixed; top:78px; left:0; right:0; background:#fff; flex-direction:column; padding:18px 24px 26px; gap:10px; box-shadow:0 16px 30px rgba(0,0,0,.12); transform:translateY(-140%); transition:.4s; }
  .main-nav.open { transform:none; }
  .nav-toggle { display:flex; }
  .hero { padding:140px 0 90px; }
  .hero h1 { font-size:32px; }
  .big-cell { width:190px; height:190px; }
  .nucleus { width:95px; height:95px; }
  .guard-grid,.vax-grid,.news-row,.news-grid,.csr-grid { grid-template-columns:1fr; }
  .form-grid { grid-template-columns:1fr; }
  .form-field.full { grid-column:span 1; }
  .footer-grid { grid-template-columns:1fr; }
  .cta-cell { padding:48px 24px; }
  .section { padding:70px 0; }
  .section-head h2 { font-size:30px; }
  .hero-meta { gap:18px; }
  .team-card { grid-template-columns:1fr; }
  .team-card img { height:220px; }
  .rnd-item { grid-template-columns:1fr; padding:22px 26px; }
  .rnd-prog { grid-column:span 1; }
}


/* ===== CMS 表单提交反馈 ===== */
.form-success.show { display:block; }
.form-alert { padding:14px 18px; border-radius:10px; margin-bottom:20px; font-size:14px; line-height:1.8; }
.form-alert-err { background:rgba(192,57,43,.08); border:1px solid #c0392b; color:#c0392b; }
.form-success.show { padding:14px 18px; border-radius:10px; margin-bottom:20px; background:rgba(39,174,96,.1); border:1px solid #27ae60; color:#27ae60; }