*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;font-family:Arial,"PingFang SC","Microsoft Yahei",sans-serif;-webkit-font-smoothing:antialiased}h1,h2,h3,p,figure{margin:0}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button{color:inherit}button svg,a svg,summary svg{width:20px;height:20px;vertical-align:middle;fill:none;stroke:currentColor;stroke-width:1.4}img{display:block;max-width:100%}button{border:0;background:none}button:focus-visible,a:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid #469cfa;outline-offset:5px}input:focus-visible,textarea:focus-visible{outline:2px solid #2879e7;outline-offset:2px}[hidden]{display:none!important}::selection{background:#c4d9fa;color:#131313}.skip-link{position:fixed;top:-80px;left:20px;z-index:1500;padding:12px;background:white;color:black}.skip-link:focus{top:10px}.site-header{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:0 30px;z-index:100}.brand{font-size:27px;font-weight:400;letter-spacing:-1px;line-height:1;display:inline-flex;align-items:baseline;gap:6px}.brand span{font-size:10px;letter-spacing:.04em}.site-header>nav{display:flex;gap:40px;align-items:center}.site-header nav a{font-size:14px;white-space:nowrap}.nav-end{display:flex;align-items:center;gap:16px}.action{display:inline-flex;align-items:center;justify-content:center;gap:15px;min-height:46px;padding:12px 24px;font-size:15px;line-height:1.4;font-weight:500;transition:background .2s,transform .2s;white-space:nowrap}.action:hover{transform:translateY(-2px)}.button-row{display:flex;gap:20px;align-items:center;flex-wrap:wrap}.eyebrow{font-size:12px;font-weight:500;line-height:1.5;letter-spacing:.04em}.text-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;line-height:1.5}.text-link:hover{text-decoration:underline;text-underline-offset:4px}.micro{font-size:12px;line-height:1.8}.image-note{position:absolute;font-size:10px;line-height:1.6;opacity:.75;z-index:2}.scope-note{font-size:12px!important;line-height:1.8!important;opacity:.7}.menu-toggle{display:none;width:42px;height:42px;padding:10px}.menu-toggle span{display:block;height:1px;background:currentColor;width:22px;margin:6px 0}#mobile-menu{position:absolute;top:100%;left:0;right:0;display:grid;padding:20px 24px;gap:24px;background:inherit;border-bottom:1px solid currentColor}#mobile-menu a{font-size:17px}.depth-tabs{display:flex;gap:6px;flex-wrap:wrap}.depth-tabs button{padding:12px 13px;min-height:44px;border:1px solid #555;border-radius:3px;font-size:12px}.reading-details{border-top:1px solid currentColor;border-bottom:1px solid currentColor;padding:0 0;font-size:14px}.reading-details summary{cursor:pointer;padding:25px 0;display:flex;justify-content:space-between;gap:20px;list-style:none;align-items:center}.reading-details summary::-webkit-details-marker{display:none}.reading-details[open] summary svg{transform:rotate(45deg)}.reading-details>p{font-size:12px;line-height:1.8;margin:20px 0}.reading-details>a{display:inline-flex;gap:12px;align-items:center;margin:0 0 24px}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%;min-width:600px;text-align:left;font-size:13px}caption{text-align:left;font-size:11px;margin:10px 0 20px;opacity:.75}th,td{padding:15px 12px;border-bottom:1px solid color-mix(in srgb,currentColor 22%,transparent);font-variant-numeric:tabular-nums}th{font-weight:500}.hardness-chart{width:100%;font-family:Arial,sans-serif;font-size:12px;fill:currentColor}.hardness-chart .chart-grid path{stroke:currentColor;opacity:.15;fill:none}.hardness-chart .chart-grid text{opacity:.65}.chart-line{stroke:currentColor;fill:none;stroke-width:2}.chart-range{stroke:currentColor;stroke-width:1.5}dialog{color:#332f2a;border:0;padding:0;border-radius:12px;max-height:92dvh;max-width:calc(100vw - 32px);width:680px;background:#f7f1e8;box-shadow:0 30px 120px #0005;overscroll-behavior:contain}dialog::backdrop{background:#0009;backdrop-filter:blur(5px)}dialog .close-dialog{position:absolute;right:16px;top:16px;border-radius:50%;width:44px;height:44px;background:#f7f1e8;color:#35322c;font-size:30px;font-weight:300;z-index:3}.quote-body{padding:54px 44px 30px}.quote-body h2{font-size:30px;line-height:1.4;font-weight:400;margin:20px 0 12px}.quote-body>p:not(.eyebrow){font-size:12px;line-height:1.8}.quote-body form{margin-top:22px;display:grid;gap:16px}.quote-body label{display:grid;font-size:13px;gap:8px}.quote-body label>span{font-size:11px;opacity:.6}.quote-body input,.quote-body textarea{width:100%;border:1px solid #b9b3a9;border-radius:4px;padding:12px;background:#fff8;font-size:16px;color:#333}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}#form-feedback{font-size:13px;line-height:1.7}dialog .action{background:#2879e7;color:white;border-radius:30px;justify-self:start}.topic-dialog{width:920px}.topic-dialog>img{width:100%;height:320px;object-fit:cover}.topic-dialog>div{padding:36px 44px 44px}.topic-dialog h2{font-size:32px;line-height:1.4;font-weight:400;margin:18px 0}.topic-dialog p:not(.eyebrow){line-height:1.9;font-size:16px;margin:0 0 24px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:45px}.footer-grid>div{display:flex;flex-direction:column;align-items:start;gap:18px}.footer-grid h3{font-size:14px;font-weight:600;margin-bottom:6px}.footer-grid a{font-size:13px}.footer-grid h2{font-weight:400;font-size:33px;line-height:1.4;letter-spacing:-1px}.footer-grid .action{margin-top:12px}.footer-bottom{display:flex;justify-content:space-between;gap:30px;font-size:11px;margin-top:100px;padding-top:24px;border-top:1px solid #8883}.review-switch{position:fixed;left:16px;bottom:15px;z-index:90;display:flex;align-items:center;gap:0;background:#f9f7f2eb;color:#373732;box-shadow:0 2px 18px #0002;border:1px solid #ccc7;border-radius:7px;backdrop-filter:blur(12px);padding:5px;font-size:11px}.review-switch span{padding:0 10px;color:#73736a}.review-switch a{padding:10px;border-radius:4px}.review-switch a[aria-current]{background:#262622;color:white}.review-switch a:hover{background:#dad8ce;color:#111}.circle{width:48px;height:48px;border:1px solid #4a474144;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:20px}.circle:hover{background:#e7ded0}.pill{display:inline-flex;align-items:center;gap:10px;padding:13px 22px;min-height:44px;background:#4a4741;color:#f7f1e8;border-radius:999px;font-size:13px;line-height:1.4;transition:background .2s}.pill:hover{background:#292723}body:has(dialog[open]){overflow:hidden}
@media(max-width:1050px){.site-header>nav{gap:20px}.site-header{padding:0 24px;gap:12px}.footer-grid{gap:28px;grid-template-columns:1.5fr 1fr 1fr}.footer-grid>div:last-child{grid-column:2/4}.footer-grid h2{font-size:28px}}
@media(max-width:760px){html{scroll-padding-top:80px}.site-header{height:66px;padding:0 20px}.site-header>nav:not(#mobile-menu){display:none}.menu-toggle{display:block}.brand{font-size:23px}.brand span{font-size:8px}.nav-end{gap:8px}.site-header .action{font-size:12px;min-height:36px;padding:10px 16px}.footer-grid{grid-template-columns:1fr 1fr;gap:40px 25px}.footer-grid>div:first-child{grid-column:1/-1}.footer-grid>div:last-child{grid-column:auto}.footer-grid h2{font-size:32px}.footer-bottom{margin-top:60px;flex-wrap:wrap;gap:18px;padding-bottom:55px}.review-switch{bottom:9px;left:9px;font-size:10px}.review-switch span{padding:0 6px}.review-switch a{padding:9px}.quote-body{padding:55px 24px 24px}.quote-body h2{font-size:25px}.form-row{grid-template-columns:1fr}.topic-dialog>img{height:230px}.topic-dialog>div{padding:24px}.topic-dialog h2{font-size:26px}.reading-details summary{padding:20px 0;font-size:13px}.image-note{font-size:9px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}.action:hover{transform:none}}