:root{--ink:#1f3438;--muted:#6d8188;--teal:#2f898e;--dark:#226e73;--aqua:#eaf6f7;--pale:#f5fafb;--line:#d9e8ea;--white:#fff;--warm:#f6f2eb;--shadow:0 20px 55px rgba(31,71,77,.09);--radius:26px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--pale);font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;font-size:17px;line-height:1.8;-webkit-font-smoothing:antialiased}img{max-width:100%;height:auto}a{color:var(--dark);text-underline-offset:.2em}.skip{position:fixed;top:8px;left:8px;z-index:90;padding:8px 14px;color:#fff;background:var(--ink);border-radius:999px;transform:translateY(-160%)}.skip:focus{transform:none}.site-header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}.nav{width:min(1240px,calc(100% - 36px));min-height:94px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:flex;align-items:center;gap:14px;color:var(--ink);text-decoration:none}.brand img{width:86px}.brand-copy{display:grid;line-height:1.25}.brand-copy strong{color:var(--dark);font-size:24px;letter-spacing:.03em}.brand-copy small{margin-top:6px;color:#86979c;font-size:13px}.menu{display:flex;align-items:center;gap:8px}.menu a{padding:9px 11px;color:var(--ink);font-size:14px;font-weight:700;text-decoration:none;border-radius:999px}.menu a:hover,.menu a[aria-current="page"]{color:var(--dark);background:var(--aqua)}.toggle{display:none;width:50px;height:50px;padding:0;border:0;border-radius:14px;background:var(--aqua)}.toggle span{display:block;width:24px;height:2px;margin:5px auto;background:var(--ink);transition:.2s}.toggle.open span:first-child{transform:translateY(7px) rotate(45deg)}.toggle.open span:nth-child(2){opacity:0}.toggle.open span:last-child{transform:translateY(-7px) rotate(-45deg)}.shell{width:min(1160px,calc(100% - 36px));margin:auto}.breadcrumb{display:flex;flex-wrap:wrap;gap:7px;padding-top:24px;color:var(--muted);font-size:14px}.breadcrumb a{color:var(--muted);text-decoration:none}.hero{padding:clamp(60px,9vw,110px) 0 clamp(50px,7vw,82px)}.eyebrow{margin:0 0 14px;color:var(--teal);font-size:13px;font-weight:850;letter-spacing:.18em}.hero h1{max-width:980px;margin:0;font-size:clamp(42px,6.2vw,78px);line-height:1.08;letter-spacing:-.045em}.lead{max-width:860px;margin:28px 0 0;color:var(--muted);font-size:clamp(18px,2.15vw,24px)}.pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}.pill{padding:7px 13px;color:var(--dark);background:var(--aqua);border-radius:999px;font-size:13px;font-weight:750}.section{padding:clamp(58px,8vw,100px) 0}.section.white{background:#fff}.section h2{margin:0 0 16px;font-size:clamp(32px,4.5vw,54px);line-height:1.16}.section-intro{max-width:780px;margin:0 0 38px;color:var(--muted);font-size:20px}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.card{padding:clamp(24px,4vw,38px);background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.card h2,.card h3{margin:0 0 12px}.card p:last-child{margin-bottom:0}.number{display:inline-grid;place-items:center;width:48px;height:48px;margin-bottom:24px;color:var(--dark);background:var(--aqua);border-radius:50%;font-weight:850}.feature{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(32px,6vw,76px);align-items:center}.feature-media{padding:24px;background:#fff;border:1px solid var(--line);border-radius:32px;box-shadow:var(--shadow)}.feature-media img{display:block;width:100%;max-height:650px;object-fit:contain;border-radius:22px}.feature-copy h1,.feature-copy h2{margin-top:0}.caption{margin:14px 4px 0;color:var(--muted);font-size:13px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;color:#fff;background:var(--teal);border:1px solid var(--teal);border-radius:999px;font-weight:800;text-decoration:none}.button.secondary{color:var(--dark);background:transparent}.facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:28px 0 0}.fact{padding:16px 18px;background:var(--aqua);border-radius:16px}.fact strong,.fact span{display:block}.fact span{color:var(--muted);font-size:13px}.data-table{width:100%;border-collapse:collapse;background:#fff;border-radius:20px;overflow:hidden;box-shadow:var(--shadow)}.data-table th,.data-table td{padding:16px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}.data-table th{width:28%;color:var(--dark);background:var(--aqua)}.notice{margin-top:30px;padding:22px 26px;color:#5d5d55;background:var(--warm);border-left:5px solid #caa66d;border-radius:0 18px 18px 0}.quote{padding:clamp(30px,5vw,52px);color:#fff;background:var(--ink);border-radius:32px}.quote p{margin:0;font-size:clamp(22px,3vw,34px);line-height:1.55}.signature{margin-top:22px;color:#b9d0d2;font-size:14px}.product-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.product-card{display:flex;flex-direction:column;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow)}.product-card.core{grid-column:span 2}.product-visual{display:grid;place-items:center;min-height:360px;padding:28px;background:linear-gradient(145deg,#edf8f8,#fff)}.product-visual img{max-height:420px;object-fit:contain}.product-body{display:flex;flex:1;flex-direction:column;padding:28px}.product-body h2{margin:0 0 10px;font-size:28px}.product-body p{color:var(--muted)}.product-body .button{align-self:flex-start;margin-top:auto}.badge{align-self:flex-start;margin-bottom:15px;padding:6px 11px;color:var(--dark);background:var(--aqua);border-radius:999px;font-size:12px;font-weight:850}.evidence{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.evidence article{padding:22px;background:#fff;border:1px solid var(--line);border-radius:20px}.evidence strong{display:block;color:var(--teal);font-size:28px}.related{display:flex;flex-wrap:wrap;gap:12px}.related a{padding:12px 16px;background:#fff;border:1px solid var(--line);border-radius:999px;text-decoration:none}.footer{padding:58px 0;color:#c0d1d3;background:var(--ink)}.footer-grid{display:flex;justify-content:space-between;gap:40px}.footer strong{display:block;color:#fff;font-size:26px}.footer nav{display:flex;flex-wrap:wrap;gap:14px}.footer a{color:#d4e3e5;text-decoration:none}.footer small{display:block;margin-top:24px;color:#8fa6aa}.back-top{position:fixed;right:22px;bottom:22px;width:50px;height:50px;border:1px solid var(--teal);border-radius:50%;color:var(--teal);background:#fff;font-size:22px;cursor:pointer;opacity:0;pointer-events:none;transition:.2s}.back-top.show{opacity:1;pointer-events:auto}
@media(max-width:980px){.toggle{display:block}.menu{position:absolute;top:94px;right:18px;left:18px;display:none;flex-direction:column;align-items:stretch;padding:16px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}.menu.open{display:flex}.menu a{padding:12px 15px}.feature{grid-template-columns:1fr}.grid,.evidence{grid-template-columns:repeat(2,minmax(0,1fr))}.product-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.product-card.core{grid-column:span 2}}
@media(max-width:640px){body{font-size:16px}.nav{min-height:82px}.brand img{width:66px}.brand-copy strong{font-size:19px}.brand-copy small{font-size:11px}.menu{top:82px}.hero{padding-top:48px}.grid,.product-grid,.evidence,.facts{grid-template-columns:1fr}.product-card.core{grid-column:auto}.product-visual{min-height:300px}.data-table,.data-table tbody,.data-table tr,.data-table th,.data-table td{display:block}.data-table th{width:100%;padding-bottom:6px}.data-table td{padding-top:6px}.footer-grid{display:grid}.back-top{right:14px;bottom:14px}}

/* Product collection: featured item spans the row; two classic products align below. */
@media(min-width:641px){.product-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.product-card.core{grid-column:1/-1}}