:root{--ink:#111820;--blue:#165dce;--cyan:#dff4fb;--line:#d6dde5;--muted:#62707c;--paper:#fff;--wash:#f4f7fa;--shadow:0 18px 55px rgba(17,24,32,.13)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--wash);color:var(--ink);font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.65;letter-spacing:0}a{color:inherit;text-decoration:none}.sheet-page{overflow:hidden}.masthead{height:76px;background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 max(6vw,28px);gap:22px;position:relative;z-index:5}.wordmark,.footer-mark{display:flex;align-items:center;gap:10px;font-weight:900;white-space:nowrap}.wordmark small{font-size:10px;color:var(--muted);font-weight:700;margin-left:5px}.grid-mark{display:inline-block;width:24px;height:24px;border:2px solid var(--ink);background:linear-gradient(90deg,transparent 45%,var(--blue) 46% 55%,transparent 56%),linear-gradient(0deg,transparent 45%,var(--blue) 46% 55%,transparent 56%);box-shadow:4px 4px 0 #b9ddf0}.route-nav{display:flex;gap:24px;margin-left:auto}.route-nav a{font-size:13px;color:#4c5b66;padding:10px 0;border-bottom:2px solid transparent}.route-nav a.is-current,.route-nav a:hover{color:var(--blue);border-color:var(--blue)}.menu-switch{display:none;background:transparent;border:0;padding:5px;width:36px}.menu-switch i{display:block;height:2px;background:var(--ink);margin:5px 0}.matrix-hero{min-height:690px;background:#fff;position:relative;display:flex;align-items:center;padding:70px max(6vw,28px);isolation:isolate}.hero-picture{position:absolute;inset:0;background:url('/assets/ahltek-com-data-sheet.webp') center/cover no-repeat;z-index:-2}.matrix-hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(255,255,255,.98) 0%,rgba(255,255,255,.92) 33%,rgba(255,255,255,.16) 77%),linear-gradient(0deg,rgba(255,255,255,.2),transparent);z-index:-1}.hero-copy{max-width:580px}.kicker{font-size:11px;letter-spacing:.16em;font-weight:900;color:var(--blue);text-transform:uppercase;margin:0 0 14px}.hero-copy h1{font-size:clamp(36px,4.6vw,66px);line-height:1.12;max-width:620px;margin:0 0 22px;letter-spacing:0}.hero-copy>p:not(.kicker){font-size:18px;color:#4f5d68;max-width:510px}.hero-actions{display:flex;gap:12px;margin-top:32px}.solid-button,.line-button{padding:12px 18px;font-size:14px;font-weight:900}.solid-button{background:var(--ink);color:#fff}.line-button{border:1px solid var(--ink);background:rgba(255,255,255,.58)}.matrix-card{position:absolute;right:max(6vw,28px);bottom:50px;width:min(350px,36vw);background:rgba(255,255,255,.92);border:1px solid #c9d2db;box-shadow:var(--shadow);padding:18px}.matrix-head{display:flex;justify-content:space-between;align-items:baseline;border-bottom:2px solid var(--ink);padding-bottom:12px;margin-bottom:1px}.matrix-head span{font-weight:900}.matrix-head b{font-size:9px;color:var(--blue);letter-spacing:.13em}.matrix-row{display:grid;grid-template-columns:1fr 1.45fr auto;gap:8px;align-items:center;border-bottom:1px solid var(--line);padding:13px 0;font-size:12px}.matrix-row strong{font-size:14px}.matrix-row span{color:var(--muted)}.matrix-row i{font-style:normal;color:#148c5a;font-size:11px;font-weight:800}.sheet-intro{display:grid;grid-template-columns:1fr 1fr;gap:8vw;padding:90px max(6vw,28px);background:#fff}.sheet-intro h2,.signal-band h2,.article-shelf h2,.faq-band h2{font-size:clamp(28px,3.3vw,46px);line-height:1.2;margin:0;max-width:530px}.sheet-intro>p{margin:22px 0;color:var(--muted);font-size:16px;max-width:530px}.quick-table{max-width:1080px;margin:0 auto;padding:0 28px 92px;background:#fff}.table-caption{display:flex;justify-content:space-between;border-top:3px solid var(--ink);padding:17px 0}.table-caption span{color:var(--blue);font-weight:900;font-size:12px;letter-spacing:.12em;text-transform:uppercase}.table-caption strong{font-size:16px}.quick-table>a{display:grid;grid-template-columns:55px 1fr auto;gap:18px;align-items:center;border-top:1px solid var(--line);padding:23px 0;transition:padding .2s,background .2s}.quick-table>a:hover{padding-left:12px;background:#f5f9fc}.quick-table b{font-size:18px;color:#a1acb7}.quick-table span{display:flex;align-items:baseline;gap:19px}.quick-table em{font-style:normal;font-size:18px;font-weight:900}.quick-table small{font-size:13px;color:var(--muted)}.quick-table i{font-style:normal;color:var(--blue);font-size:24px}.signal-band{background:#121b24;color:#fff;padding:92px max(6vw,28px);display:grid;grid-template-columns:.95fr 1.05fr;gap:8vw}.signal-band .kicker{color:#81d8ef}.signal-band h2{max-width:480px}.signal-band p{color:#b5c5d0;max-width:530px}.signal-band a{display:inline-flex;gap:10px;color:#81d8ef;font-weight:900;margin-top:14px}.signal-band a span{font-size:20px}.signal-list{border-top:1px solid rgba(223,244,251,.28)}.signal-list div{display:grid;grid-template-columns:100px 1fr;gap:8px;border-bottom:1px solid rgba(223,244,251,.28);padding:21px 0}.signal-list span{color:#81d8ef;font-size:10px;letter-spacing:.14em;font-weight:900}.signal-list b{font-size:18px}.signal-list p{grid-column:2;margin:0;font-size:13px}.article-shelf{padding:92px max(6vw,28px);background:#fff}.shelf-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:30px}.shelf-head>a{font-weight:900;color:var(--blue);white-space:nowrap}.article-rows{border-top:2px solid var(--ink)}.article-rows>a{display:grid;grid-template-columns:115px 1.15fr 1fr 25px;gap:20px;align-items:center;border-bottom:1px solid var(--line);padding:20px 0}.article-rows time{font-size:12px;color:#73808a}.article-rows strong{font-size:18px;line-height:1.35}.article-rows span{font-size:13px;color:var(--muted)}.article-rows i{font-style:normal;color:var(--blue);font-size:23px}.faq-band{display:grid;grid-template-columns:.8fr 1.2fr;gap:8vw;padding:92px max(6vw,28px);background:#e7f1f6}.faq-band>div:first-child>p:last-child{color:var(--muted);max-width:380px}.faq-grid{border-top:2px solid var(--ink)}details{border-bottom:1px solid #b9c9d3;padding:17px 0}summary{cursor:pointer;font-weight:900;padding-right:30px;position:relative}summary:after{content:"+";position:absolute;right:4px;font-size:21px;color:var(--blue)}details[open] summary:after{content:"−"}details p{color:#53636e;margin:12px 0 0}.inner-head,.article-top{background:#fff;padding:86px max(6vw,28px) 55px;border-bottom:1px solid var(--line)}.inner-head h1,.article-top h1{font-size:clamp(36px,4.6vw,62px);line-height:1.12;max-width:850px;margin:0 0 16px}.inner-head>p:last-child,.article-intro{max-width:660px;color:var(--muted);font-size:17px}.data-blocks{max-width:1100px;margin:0 auto;padding:0 28px 90px;background:#fff}.data-blocks article{display:grid;grid-template-columns:225px 1fr;border-bottom:1px solid var(--line);padding:38px 0;gap:35px}.row-label{font-size:22px;font-weight:900}.data-blocks p{color:#4d5d68;margin:0 0 14px}.data-blocks ul{color:#4d5d68;padding-left:20px}.article-top{display:flex;justify-content:space-between;gap:30px;align-items:end}.article-top time{font-size:13px;color:#6c7b87}.article-stamp{border:2px solid var(--blue);color:var(--blue);padding:12px 18px;text-align:center;font-size:10px;letter-spacing:.15em;font-weight:900}.article-stamp b{font-size:28px;letter-spacing:0}.article-copy{max-width:820px;margin:0 auto;padding:56px 28px 30px;background:#fff}.article-copy section{border-top:3px solid var(--ink);padding:25px 0 16px;margin-bottom:26px}.article-copy h2{font-size:28px;line-height:1.25;margin:0 0 15px}.article-copy p{font-size:17px;color:#3e4f5a;margin:0 0 18px}.article-links{border-top:1px solid var(--line);padding-top:22px;display:flex;gap:24px;font-weight:900;color:var(--blue)}.related{max-width:1000px;margin:0 auto;padding:35px 28px 90px;background:#fff}.related>div{border-top:2px solid var(--ink)}.related a{display:grid;grid-template-columns:120px 1fr 22px;gap:15px;align-items:center;padding:16px 0;border-bottom:1px solid var(--line)}.related time{font-size:12px;color:var(--muted)}.related strong{font-size:15px}.related span{color:var(--blue);font-size:20px}.data-footer{display:grid;grid-template-columns:1.5fr 1fr 1fr;padding:52px max(6vw,28px) 22px;background:#121b24;color:#c1d0d9;gap:35px}.footer-intro p{font-size:13px;max-width:290px}.footer-mark{color:#fff}.data-footer strong{display:block;color:#fff;margin-bottom:10px;font-size:13px}.data-footer>div:not(.footer-base){display:flex;flex-direction:column;gap:6px;font-size:13px}.footer-base{grid-column:1/-1;border-top:1px solid rgba(223,244,251,.22);padding-top:20px;margin-top:12px;display:flex;justify-content:space-between;font-size:12px}.footer-base a{margin-left:17px}@media(max-width:820px){.masthead{height:68px;padding:0 20px}.wordmark small{display:none}.menu-switch{display:block;margin-left:auto}.route-nav{position:absolute;display:none;top:68px;left:0;right:0;background:#fff;padding:15px 20px;flex-direction:column;gap:9px;border-bottom:1px solid var(--line)}.route-nav.is-open{display:flex}.matrix-hero{min-height:820px;padding:67px 23px 270px;align-items:start}.hero-picture{background-position:63% center}.matrix-hero:after{background:linear-gradient(90deg,rgba(255,255,255,.98),rgba(255,255,255,.67) 70%,rgba(255,255,255,.12)),linear-gradient(0deg,rgba(255,255,255,.45),transparent 55%)}.hero-copy h1{font-size:37px}.hero-copy>p:not(.kicker){font-size:16px}.hero-actions{flex-wrap:wrap}.matrix-card{left:20px;right:20px;bottom:23px;width:auto;padding:14px}.matrix-row{grid-template-columns:1fr 1.4fr auto;padding:10px 0}.sheet-intro,.signal-band,.faq-band{grid-template-columns:1fr;padding:64px 24px;gap:24px}.quick-table{padding:0 24px 64px}.quick-table>a{grid-template-columns:38px 1fr 20px;gap:11px;padding:18px 0}.quick-table span{display:block}.quick-table small{display:block;margin-top:4px}.article-shelf{padding:65px 24px}.shelf-head{align-items:start;flex-direction:column;gap:10px}.article-rows>a{grid-template-columns:85px 1fr 20px;gap:10px}.article-rows span{grid-column:2;font-size:12px}.article-rows i{grid-column:3;grid-row:1/3}.data-blocks{padding:0 24px 62px}.data-blocks article{grid-template-columns:1fr;gap:8px;padding:30px 0}.article-top{padding:67px 24px 45px;align-items:start;flex-direction:column}.article-top h1,.inner-head h1{font-size:36px}.article-copy{padding:44px 24px 20px}.article-copy p{font-size:16px}.article-links{flex-direction:column;gap:10px}.related{padding:30px 24px 65px}.related a{grid-template-columns:1fr 20px;gap:6px}.related time{grid-column:1/-1}.data-footer{grid-template-columns:1fr;padding:42px 24px 20px}.footer-base{grid-column:auto;align-items:start;gap:14px;flex-direction:column}.footer-base a{margin:0 14px 0 0}}