:root{--bg:#fff;--bg-soft:#f5f7fa;--bg-dark:#0f2740;--ink:#16212e;--ink-soft:#4a5a6a;--line:#e2e8f0;--primary:#14507a;--primary-dark:#0d3a5c;--accent:#c9742e;--accent-dark:#a85d20;--ok:#1f8a5b;--radius:12px;--maxw:1120px;--shadow:0 6px 24px rgba(15,39,64,.08)}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,PingFang SC,Microsoft YaHei,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:50;background:hsla(0,0%,100%,.92);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}.site-header .inner{display:flex;align-items:center;justify-content:space-between;height:64px}.brand{font-weight:800;font-size:20px;letter-spacing:-.3px;color:var(--primary-dark)}.brand span{color:var(--accent)}.nav{display:flex;align-items:center;gap:22px}.nav a{color:var(--ink-soft);font-weight:600;font-size:15px}.lang-switch,.nav a:hover{color:var(--primary)}.lang-switch{border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-weight:700;font-size:13px;background:var(--bg-soft)}.lang-switch:hover{border-color:var(--primary)}.btn{display:inline-block;cursor:pointer;border:none;background:var(--primary);color:#fff;font-weight:700;font-size:15px;padding:12px 22px;border-radius:999px;transition:.15s}.btn:hover{background:var(--primary-dark)}.btn-accent{background:var(--accent)}.btn-accent:hover{background:var(--accent-dark)}.btn-ghost{background:transparent;color:var(--primary);border:1px solid var(--primary)}.btn-ghost:hover{background:var(--bg-soft)}.hero{background:linear-gradient(135deg,#0f2740,#14507a);color:#fff;padding:76px 0 84px}.hero .badge{display:inline-block;background:hsla(0,0%,100%,.12);border:1px solid hsla(0,0%,100%,.2);padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;margin-bottom:18px}.hero h1{font-size:42px;line-height:1.15;margin:0 0 16px;max-width:760px;letter-spacing:-.5px}.hero p{font-size:18px;color:#d6e4f0;max-width:660px;margin:0 0 28px}.hero .cta{display:flex;gap:14px;flex-wrap:wrap}.hero .btn-ghost{color:#fff;border-color:hsla(0,0%,100%,.5)}.hero .btn-ghost:hover{background:hsla(0,0%,100%,.1)}.stats{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:18px;gap:18px;margin-top:54px}.stat{background:hsla(0,0%,100%,.08);border:1px solid hsla(0,0%,100%,.14);border-radius:var(--radius);padding:18px 20px}.stat .n{font-size:26px;font-weight:800;color:#fff}.stat .l{font-size:13px;color:#b9cfe2}.section{padding:64px 0}.section.soft{background:var(--bg-soft)}.section h2{font-size:30px;margin:0 0 8px;letter-spacing:-.4px}.section .lead{color:var(--ink-soft);font-size:16px;max-width:720px;margin:0 0 32px}.grid{display:grid;grid-gap:18px;gap:18px}.grid.cols-2{grid-template-columns:repeat(2,1fr)}.grid.cols-3{grid-template-columns:repeat(3,1fr)}.grid.cols-4{grid-template-columns:repeat(4,1fr)}.card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}.card h3{margin:0 0 8px;font-size:18px}.card p{margin:0;color:var(--ink-soft);font-size:14.5px}.card .ic{font-size:22px}.why{list-style:none;padding:0;margin:0;display:grid;grid-gap:14px;gap:14px}.why li{display:flex;gap:12px;align-items:flex-start;font-size:16px}.why li:before{content:"✓";color:var(--ok);font-weight:800;margin-top:1px}.filters{display:flex;flex-wrap:wrap;gap:18px;margin-bottom:26px}.filter-group{display:flex;flex-direction:column;gap:6px}.filter-group label{font-size:12px;font-weight:700;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.4px}.chips{display:flex;flex-wrap:wrap;gap:8px}.chip{border:1px solid var(--line);background:var(--bg);border-radius:999px;padding:7px 14px;font-size:13px;font-weight:600;color:var(--ink-soft);cursor:pointer}.chip.active{background:var(--primary);color:#fff;border-color:var(--primary)}.product-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:18px;gap:18px}.product{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--bg);box-shadow:var(--shadow);display:flex;flex-direction:column;transition:.15s}.product:hover{transform:translateY(-3px);border-color:var(--primary)}.product .thumb{aspect-ratio:1/1;background:linear-gradient(135deg,#eef3f8,#dfe9f2);display:flex;align-items:center;justify-content:center;font-size:13px;color:#8aa0b4;font-weight:700;letter-spacing:.3px;overflow:hidden;padding:14px}.product .thumb img{width:100%;height:100%;object-fit:contain;display:block}.product .body{padding:16px 18px;display:flex;flex-direction:column;gap:8px;flex:1 1}.product .name{font-size:17px;font-weight:700}.product .sub{font-size:13px;color:var(--ink-soft)}.product .specs{display:flex;flex-wrap:wrap;gap:6px;margin-top:4px}.product .spec{font-size:11.5px;background:var(--bg-soft);border:1px solid var(--line);border-radius:6px;padding:3px 8px;color:var(--ink-soft)}.product .foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:8px}.product .price{font-weight:800;color:var(--primary-dark);font-size:15px}.product .price small{font-weight:600;color:var(--ink-soft);font-size:11px}.product .more{font-size:13px;font-weight:700;color:var(--accent)}.detail-head{display:flex;gap:32px;flex-wrap:wrap;align-items:flex-start}.detail-thumb{flex:1 1 320px;aspect-ratio:1/1;background:linear-gradient(135deg,#eef3f8,#dfe9f2);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;color:#8aa0b4;font-weight:700;overflow:hidden;padding:24px}.detail-thumb img{width:100%;height:100%;object-fit:contain;display:block}.detail-info{flex:1 1 360px}.spec-table{width:100%;border-collapse:collapse;margin:18px 0}.spec-table td{padding:10px 0;border-bottom:1px solid var(--line);font-size:14.5px}.spec-table td:first-child{color:var(--ink-soft);width:42%}.spec-table td:last-child{font-weight:600}.note{font-size:13px;color:var(--ink-soft);background:var(--bg-soft);border-radius:8px;padding:12px 14px}.form{grid-gap:16px;max-width:560px}.form,.form .row{display:grid;gap:16px}.form .row{grid-template-columns:1fr 1fr;grid-gap:16px}.field{display:flex;flex-direction:column;gap:6px}.field label{font-size:13px;font-weight:700;color:var(--ink-soft)}.field input,.field select,.field textarea{border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-size:15px;font-family:inherit;background:var(--bg);color:var(--ink)}.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--primary)}.form .success{background:#e9f7ef;border:1px solid #b6e2c9;color:#14643f;border-radius:10px;padding:14px;font-weight:600}.form .err{color:#c0392b;font-size:13px;font-weight:600}.site-footer{background:var(--bg-dark);color:#cdd9e6;padding:44px 0 28px;margin-top:0}.site-footer .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr;grid-gap:28px;gap:28px}.site-footer h4{color:#fff;font-size:14px;margin:0 0 12px;text-transform:uppercase;letter-spacing:.5px}.site-footer a{color:#cdd9e6;display:block;margin-bottom:8px;font-size:14px}.site-footer a:hover{color:#fff}.site-footer .brand-f{color:#fff;font-weight:800;font-size:18px;margin-bottom:10px}.site-footer .copy{border-top:1px solid hsla(0,0%,100%,.1);margin-top:28px;padding-top:18px;font-size:13px;color:#8ba0b5}.steps{display:grid;grid-template-columns:repeat(5,1fr);grid-gap:14px;gap:14px}.step{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}.step .n{width:34px;height:34px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;margin-bottom:10px}.step h4{margin:0 0 6px;font-size:15px}.step p{margin:0}.breadcrumb,.step p{font-size:13px;color:var(--ink-soft)}.breadcrumb{margin-bottom:18px}.breadcrumb a:hover{color:var(--primary)}@media (max-width:900px){.hero h1{font-size:32px}.grid.cols-3,.grid.cols-4,.product-grid,.stats,.steps{grid-template-columns:repeat(2,1fr)}.site-footer .cols{grid-template-columns:1fr}.nav{gap:14px}.nav a{font-size:14px}}@media (max-width:560px){.form .row,.grid.cols-2,.grid.cols-3,.grid.cols-4,.product-grid,.steps{grid-template-columns:1fr}.nav .navlink-text{display:none}}