:root{--paper:#fcfcfb;--ink:#0a0a08;--muted:#74746f;--rule:#0a0a081a;--field:#0a0a0808;--live:#2b7fff;--font:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;--ease:cubic-bezier(.2,.8,.2,1);--buncss-light:initial;--buncss-dark: ;color-scheme:light}.dark{--paper:#171716;--ink:#fafaf9;--muted:#a1a19e;--rule:#fafaf91a;--field:#fafaf90a;--live:#66a3ff;--buncss-light: ;--buncss-dark:initial;color-scheme:dark}*,*:before,*:after{box-sizing:border-box}html,body{overflow:hidden;height:100%;margin:0}body{background:var(--paper);color:var(--ink);font:15px/1.6 var(--font);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer;background:0 0;border:0;padding:0}svg{display:block}:focus-visible{outline:2px solid var(--live);outline-offset:2px;border-radius:6px}.skip{position:fixed;z-index:10;background:var(--ink);color:var(--paper);border-radius:8px;padding:8px 12px;top:-48px;left:12px}.skip:focus{top:12px}html:lang(zh-CN) [data-l=en],html:not(:lang(zh-CN)) [data-l=zh]{display:none}.field{position:fixed;display:block;width:100vw;height:100vh;inset:0}.top{position:fixed;z-index:2;display:flex;align-items: center;height:60px;padding:0 max(32px,50% - 688px);inset:0 0 auto}.brand{display:inline-flex;letter-spacing:-.01em;align-items: center;gap:10px;font-weight:600}.mark-live{fill:var(--live)}.top-tools{display:flex;align-items: center;gap:4px;margin-left:auto}.tool{display:inline-grid;color:var(--muted);border-radius:8px;place-items: center;min-width:32px;height:32px;padding:0 10px;transition:color .2s,background-color .2s;font-size:13px}.tool:hover{color:var(--ink);background:var(--field)}.tool-icon{padding:0}.tool svg{fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;width:16px;height:16px}.i-sun{display:none}.dark .i-sun{display:block}.dark .i-moon{display:none}.stage{position:fixed;z-index:1;display:grid;pointer-events:none;place-items: center;padding:0 24px;inset:0}.copy{display:grid;text-align:center;pointer-events:auto;justify-items:center;margin-top:-2vh}.name{letter-spacing:-.035em;margin:0;font-size:clamp(44px,7.2vw,96px);font-weight:600;line-height:1}.slogan{letter-spacing:.01em;color:var(--muted);text-wrap:balance;max-width:44rem;margin:24px 0 0;font-size:clamp(16px,1.55vw,20px)}.ctas{display:flex;flex-wrap:wrap;justify-content:center;gap:18px;margin-top:33px}.btn{display:inline-flex;border:1px solid var(--rule);background:color-mix(in oklab,var(--paper)70%,transparent);backdrop-filter:blur(6px);border-radius:9px;justify-content:center;align-items: center;gap:8px;min-width:128px;height:40px;padding:0 18px;transition:background-color .2s,border-color .2s;font-size:14px;font-weight:500}.btn:hover{border-color:color-mix(in oklab,var(--ink)30%,transparent)}.btn-main{background:var(--ink);color:var(--paper);border-color:var(--ink)}.btn-main:hover{background:color-mix(in oklab,var(--ink)86%,transparent)}.desc{position:relative;color:var(--muted);width:min(40rem,90vw);height:1.6em;margin-top:20px;font-size:14px}.desc>span{position:absolute;white-space:nowrap;opacity:0;transition:opacity .35s var(--ease),transform .35s var(--ease);inset:0;transform:translateY(-4px)}.desc>span.on{opacity:1;transition-delay:60ms;transform:none}.reveal{opacity:0;transition:opacity .7s var(--ease),transform .7s var(--ease);transform:translateY(10px)}.reveal.on{opacity:1;transform:none}@media (max-width:720px){.top{padding:0 16px}.ctas{gap:12px}.desc{height:3.2em}.desc>span{white-space:normal}}@media (prefers-reduced-motion:reduce){.reveal,.desc>span{transition:none}.reveal{opacity:1;transform:none}}