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var(--line);grid-template-columns:1fr 1fr;gap:1px;display:grid}.concept-bottom section{background:var(--paper);padding:28px}.concept-bottom ol{color:var(--muted);margin:22px 0 0;padding-left:1.2rem;line-height:1.9}.history-list{flex-wrap:wrap;gap:7px;margin-top:22px;display:flex}.history-list span{border:1px solid var(--line);padding:.45rem .6rem;font-size:.75rem}@media (max-width:900px){.nav-list{display:none}.mobile-nav{display:block;position:relative}.mobile-nav summary{cursor:pointer;border:1px solid var(--line-strong);padding:.5rem .7rem;font-size:.78rem;list-style:none}.mobile-nav summary::-webkit-details-marker{display:none}.mobile-nav[open] ul{background:var(--paper);border:1px solid var(--line-strong);width:210px;margin:0;padding:12px;list-style:none;position:absolute;top:42px;right:0;box-shadow:0 18px 45px #111f2d1f}.mobile-nav li a{color:var(--muted);padding:.7rem;display:block}.mobile-nav li a:hover,.mobile-nav li a:focus-visible,.mobile-nav li a[data-active]{color:var(--ink);background:var(--paper-deep)}.section-head,.detail-layout,.operator-grid{grid-template-columns:1fr}.detail-aside{grid-template-columns:auto 1fr;align-items:start;position:static}.detail-aside dl{grid-template-columns:repeat(3,1fr)}.lab-row{grid-template-columns:90px 1fr auto}.lab-row p{grid-column:2/-1}.knowledge-map{grid-template-columns:repeat(2,1fr)}.signal-grid{grid-template-columns:1fr}.signal{min-height:200px}.resource-grid{grid-template-columns:1fr}.resource{padding:24px 0}.resource+.resource{border-left:0;padding-left:0}.resource h2,.resource p{min-height:0}}@media (max-width:680px){.shell{width:min(calc(100% - 28px), var(--max))}.page-pad{padding-block:48px 72px}.site-header-inner{height:62px}.brand{letter-spacing:.08em;font-size:.69rem}.brand-mark{width:19px;height:19px}.hero-home{min-height:calc(100svh - 62px);padding:54px 0 26px}.display{letter-spacing:-.045em;font-size:clamp(2rem,8.4vw,3.05rem);line-height:1.12}.hero-title{margin-top:20px}.hero-support{margin:30px 0 0}.hero-home .lead{font-size:1rem;line-height:1.72}.hero-index{flex-direction:column;align-items:start;margin-top:45px}.section{padding-block:52px}.section-head{gap:12px;margin-bottom:26px}.split-feature{grid-template-columns:1fr}.split-side{min-height:250px}.lab-row{grid-template-columns:1fr auto;gap:12px}.lab-row>.mono,.lab-row p{grid-column:1/-1}.knowledge-map,.resource-grid{grid-template-columns:1fr}.resource{padding:24px 0}.resource+.resource{border-left:0;padding-left:0}.resource h2,.resource p{min-height:0}.detail-layout{padding:42px 0 72px}.detail-aside{border-bottom:1px solid var(--line);grid-template-columns:1fr;padding-bottom:24px}.detail-aside dl{grid-template-columns:1fr 1fr}.now-grid{grid-template-columns:1fr;gap:18px}.footer-grid{grid-template-columns:1fr;gap:30px}.footer-bottom{flex-direction:column}.concept-toolbar{flex-direction:column-reverse}.mode-toggle{align-self:stretch}.timer-grid,.fact-grid,.concept-bottom{grid-template-columns:1fr}.timer-panel:first-child{border-right:0;border-bottom:1px solid var(--line);padding-right:0}.timer-panel:last-child{padding-left:0}.timer-number{font-size:clamp(4rem,22vw,6.5rem)}.fact-check{padding:24px 18px}.fact-head{flex-direction:column}.fact-button{align-self:stretch}.concept-actions button{flex:1}}@media (max-width:360px){.display{font-size:1.8rem}.brand{letter-spacing:.04em}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-leading{syntax:"*";inherits:false}