/* ===== 福建三颗芯 · 现代工业风官网 v2 ===== */
:root{
  --green-900:#0B3D28; --green-800:#0E4A31; --green-700:#105C3C; --green-600:#14724C;
  --green-100:#E3F1EA; --green-50:#F0F7F3;
  --ink:#101613; --ink-2:#4A5650; --ink-3:#7A8680;
  --line:#E2E8E4; --bg:#F6F8F7;
  --radius:14px;
  --shadow:0 1px 2px rgba(13,32,23,.04),0 8px 24px rgba(13,32,23,.06);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",-apple-system,sans-serif;color:var(--ink);background:#fff;line-height:1.7;font-size:16px}
a{color:var(--green-700);text-decoration:none}
a:hover{color:var(--green-800)}
img{max-width:100%;display:block}
h1,h2,h3,h4{line-height:1.3;font-weight:700}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}

.trustbar{background:var(--green-900);color:#C6D9CF;font-size:13px;padding:8px 0;text-align:center;letter-spacing:.3px}
.trustbar b{color:#fff}
.trustbar .sep{margin:0 12px;opacity:.3}
@media(max-width:720px){.tb-hide{display:none}}

.nav{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:100}
.nav-inner{max-width:1180px;margin:0 auto;padding:0 24px;height:64px;display:flex;justify-content:space-between;align-items:center}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--ink)}
.logo img{height:36px;width:36px;border-radius:8px;object-fit:contain}
.logo span{color:var(--green-700)}
.nav ul{display:flex;gap:4px;list-style:none}
.nav ul a{padding:8px 14px;border-radius:8px;color:var(--ink-2);font-size:15px;font-weight:500}
.nav ul a:hover{background:var(--green-50);color:var(--green-700)}
.nav ul a.on{background:var(--green-100);color:var(--green-800)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:6px 14px;cursor:pointer;font-size:14px}
@media(max-width:900px){
  .nav-toggle{display:block}
  .nav ul{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;padding:12px 24px;border-bottom:1px solid var(--line)}
  .nav ul.open{display:flex}
}

.hero{background:linear-gradient(135deg,#0B3D28 0%,#0E4A31 50%,#105C3C 100%);color:#fff;padding:90px 0 110px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-10%;top:-20%;width:60%;height:140%;background:radial-gradient(circle,rgba(255,255,255,.08),transparent 60%);pointer-events:none}
.hero .kicker{display:inline-block;font-size:13px;letter-spacing:3px;color:#9CC5B0;border:1px solid rgba(255,255,255,.25);padding:6px 14px;border-radius:100px;margin-bottom:24px}
.hero h1{font-size:44px;line-height:1.25;font-weight:800;margin-bottom:20px;max-width:800px;color:#fff}
.hero .lead{font-size:18px;color:#D6E4DC;max-width:680px;margin-bottom:36px;line-height:1.8}
.hero .btn{margin-right:12px;margin-top:8px}
@media(max-width:720px){.hero{padding:60px 0 80px}.hero h1{font-size:30px}}

.btn{display:inline-block;padding:12px 26px;border-radius:10px;font-weight:600;font-size:15px;transition:all .15s;cursor:pointer;border:none}
.btn-primary{background:var(--green-700);color:#fff;box-shadow:0 4px 14px rgba(16,92,60,.35)}
.btn-primary:hover{background:var(--green-800);color:#fff;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.4)}
.btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff}
.btn-outline{background:#fff;color:var(--green-700);border:1.5px solid var(--green-700)}
.btn-outline:hover{background:var(--green-50)}

.section{padding:80px 0}
.section.alt{background:var(--bg)}
.section-head{margin-bottom:40px}
.section-head h2{font-size:32px;font-weight:800;color:var(--ink);margin-bottom:12px}
.section-head p{color:var(--ink-2);font-size:17px;max-width:720px}
@media(max-width:720px){.section{padding:50px 0}.section-head h2{font-size:26px}}

.grid{display:grid;gap:24px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:900px){.g3,.g2{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.card.hl{border-top:3px solid var(--green-700)}
.card h4{font-size:18px;font-weight:700;margin-bottom:14px;color:var(--ink)}
.card p{color:var(--ink-2);font-size:15px}
.card ul{margin:12px 0 0 20px;color:var(--ink-2);font-size:15px}
.card ul li{margin-bottom:8px}

.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:40px}
.stat{text-align:center}
.stat .num{font-size:42px;font-weight:800;color:var(--green-700);line-height:1.1}
.stat .lbl{font-size:14px;color:var(--ink-3);margin-top:6px}
@media(max-width:720px){.stats{grid-template-columns:repeat(2,1fr)}}

.img-round{border-radius:var(--radius);box-shadow:var(--shadow);margin:24px 0}

.tablewrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;background:#fff}
th{background:var(--green-50);text-align:left;padding:14px 18px;font-weight:700;color:var(--ink);font-size:14px}
td{padding:14px 18px;border-top:1px solid var(--line);font-size:15px;color:var(--ink-2)}

.quote{background:var(--green-50);border-left:4px solid var(--green-700);padding:18px 22px;border-radius:0 10px 10px 0;color:var(--ink-2);font-size:14px;margin:20px 0}

.cta{background:linear-gradient(135deg,var(--green-900),var(--green-700));color:#fff;padding:70px 0;text-align:center}
.cta h2{font-size:30px;margin-bottom:12px;color:#fff}
.cta p{color:#C6D9CF;margin-bottom:28px}
.cta .btn{margin:0 8px}

footer{background:#0B3D28;color:#9CB8AB;padding:60px 0 30px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:40px;margin-bottom:40px}
@media(max-width:720px){.foot-grid{grid-template-columns:1fr 1fr}}
footer h4{color:#fff;font-size:15px;margin-bottom:16px}
footer p,footer a{color:#9CB8AB;font-size:14px;line-height:1.9}
footer ul{list-style:none}
footer a:hover{color:#fff}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;font-size:13px;color:#6E8A7E;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

.backtotop{position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;background:var(--green-700);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;box-shadow:0 4px 12px rgba(16,92,60,.4)}
.backtotop:hover{background:var(--green-800);color:#fff}

.news-card{display:flex;gap:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);margin-bottom:20px;align-items:flex-start}
.news-card .date{flex-shrink:0;width:80px;text-align:center}
.news-card .date .ym{font-size:20px;font-weight:800;color:var(--green-700)}
.news-card .date .d{font-size:13px;color:var(--ink-3)}
.news-card h4{font-size:18px;margin-bottom:8px}
.news-card p{color:var(--ink-2);font-size:14px}
@media(max-width:720px){.news-card{flex-direction:column}}

.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
@media(max-width:720px){.contact-grid{grid-template-columns:1fr}}
.contact-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.contact-box h4{font-size:17px;margin-bottom:16px;color:var(--green-700)}
.contact-box p{color:var(--ink-2);font-size:15px;margin-bottom:10px}
.contact-box strong{color:var(--ink)}

.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 18px;font-size:14px;color:var(--ink)}

.pagehead{background:linear-gradient(135deg,#0B3D28,#105C3C);color:#fff;padding:60px 0}
.pagehead h1{color:#fff;font-size:34px;margin-bottom:10px}
.pagehead p{color:#C6D9CF;max-width:760px}

@media(max-width:720px){
  .hero .btn,.cta .btn{display:block;width:100%;margin:10px 0;text-align:center}
  .btn{padding:13px 20px}
  .card{padding:20px}
}