:root{--navy:#0b2545;--navy-2:#13315c;--steel:#486581;--accent:#e8871e;--accent-2:#f5a94b;--bg:#f5f7fa;--card:#ffffff;--ink:#1c2733;--muted:#5b6b7c;--line:#dfe6ee}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Segoe UI,Helvetica Neue,Arial,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--ink);line-height:1.65}a{color:inherit;text-decoration:none}.container{max-width:1120px;margin:0 auto;padding:0 24px}.site-header{background:var(--navy);color:#fff;position:-webkit-sticky;position:sticky;top:0;z-index:50}.header-inner{justify-content:space-between;height:64px}.brand,.header-inner{display:flex;align-items:center}.brand{gap:10px}.brand-seal{height:44px;width:44px;object-fit:contain;border-radius:8px;flex-shrink:0}.footer-seal{height:56px;width:56px;margin-bottom:12px}.brand-name{font-size:22px;font-weight:800;letter-spacing:2px}.brand-sub{font-size:12px;opacity:.75}.main-nav{display:flex;align-items:center;gap:26px;font-size:14px}.main-nav a:hover{color:var(--accent-2)}.lang-switch{border:1px solid rgba(255,255,255,.4);border-radius:4px;padding:3px 10px;font-size:13px}.lang-switch:hover{border-color:var(--accent-2);color:var(--accent-2)}.hero{background:linear-gradient(135deg,var(--navy) 0,var(--navy-2) 60%,var(--steel) 100%);color:#fff;padding:88px 0 96px}.hero h1{font-size:42px;line-height:1.25;max-width:760px;margin-bottom:20px}.hero h1 em{color:var(--accent-2);font-style:normal}.hero p.lead{font-size:18px;max-width:680px;opacity:.92;margin-bottom:34px}.hero-photo{background:linear-gradient(120deg,rgba(8,27,51,.94) 30%,rgba(19,49,92,.72)),url(/images/valve-row.jpg) 50% /cover no-repeat}.figure-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:24px;gap:24px;margin-bottom:48px}.product-fig{margin:0}.product-fig img{width:100%;height:260px;object-fit:cover;object-position:center 30%;border-radius:10px;border:1px solid var(--line);display:block;background:#fff;box-shadow:0 2px 12px rgba(11,37,69,.08)}.product-fig figcaption{font-size:13px;color:var(--muted);margin-top:10px;text-align:center}.cta-row{display:flex;gap:16px;flex-wrap:wrap}.btn{display:inline-block;padding:12px 28px;border-radius:6px;font-size:15px;font-weight:600}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-2)}.btn-ghost{border:1px solid rgba(255,255,255,.55);color:#fff}.btn-ghost:hover{border-color:#fff}section{padding:72px 0}.section-title{font-size:30px;margin-bottom:10px}.section-sub{color:var(--muted);margin-bottom:40px;max-width:720px}.grid-3{grid-template-columns:repeat(3,1fr);grid-gap:24px}.grid-2,.grid-3{display:grid;gap:24px}.grid-2{grid-template-columns:repeat(2,1fr);grid-gap:24px}.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:28px}.card h3{font-size:18px;margin-bottom:10px}.card p{color:var(--muted);font-size:14px}.card .tag{display:inline-block;background:rgba(232,135,30,.12);color:var(--accent);border-radius:4px;font-size:12px;font-weight:700;padding:2px 10px;margin-bottom:12px}.spec-table{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden;font-size:14px}.spec-table td,.spec-table th{border-bottom:1px solid var(--line);padding:12px 18px;text-align:left}.spec-table th{background:#eef2f7;width:34%;font-weight:600}.spec-table tr:last-child td,.spec-table tr:last-child th{border-bottom:none}.capability-strip{background:var(--navy);color:#fff}.capability-strip .item{display:flex;gap:14px;align-items:flex-start}.capability-strip .dot{width:10px;height:10px;border-radius:50%;background:var(--accent);margin-top:8px;flex:none}.capability-strip h3{font-size:16px;margin-bottom:6px}.capability-strip p{font-size:14px;opacity:.85}.quote-block{background:var(--card);border-left:4px solid var(--accent);border-radius:0 10px 10px 0;padding:30px 34px;font-size:17px;color:var(--ink);box-shadow:0 2px 12px rgba(11,37,69,.06)}.cta-band{background:linear-gradient(120deg,var(--accent) 0,#d4720e 100%);color:#fff;text-align:center}.cta-band h2{font-size:30px;margin-bottom:14px}.cta-band p{margin-bottom:28px;opacity:.95}.cta-band .btn{background:#fff;color:var(--accent)}.site-footer{background:#081b33;color:rgba(255,255,255,.72);padding:48px 0 32px;font-size:13px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;grid-gap:32px;gap:32px;margin-bottom:28px}.site-footer h4{color:#fff;font-size:14px;margin-bottom:12px}.site-footer a:hover{color:var(--accent-2)}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;font-size:12px;opacity:.7}@media (max-width:860px){.hero h1{font-size:30px}.figure-grid,.footer-grid,.grid-2,.grid-3{grid-template-columns:1fr}.main-nav{gap:14px;font-size:13px}}