:root{--bg:#f5f5f7;--ink:#1d1d1f;--muted:#6e6e73;--blue:#0071e3;--line:#d2d2d7;--lime:#b6d8ff;font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{opacity:.45;cursor:not-allowed}a,button{transition:background .2s,color .2s,box-shadow .2s}header{height:66px;position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:0 max(32px,calc((100vw - 1120px)/2));background:#fbfbfddc;backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border-bottom:1px solid 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65px;text-align:center}.hero-kicker{font-size:18px;font-weight:600;letter-spacing:1px;color:#424245}h1{font-size:clamp(54px,6.6vw,88px);font-weight:650;line-height:1.13;letter-spacing:-4px;margin:22px 0 25px}h1 em{font-style:normal;background:linear-gradient(110deg,#0672de 8%,#5898ed 46%,#6663ce 90%);-webkit-background-clip:text;background-clip:text;color:transparent}.lead{font-size:23px;line-height:1.65;letter-spacing:-.6px;color:#6e6e73;margin:0 auto}.actions{display:flex;justify-content:center;align-items:center;gap:30px;margin:27px 0 17px}.fine{font-size:11px;color:#86868b;line-height:1.7}.hero .fine{font-size:12px}.workspace{--line:#34373f;--muted:#9da5b3;--lime:#a2caff;color:#f5f5f7;color-scheme:dark;background:#11141a;border:1px solid #42454d;border-radius:22px;box-shadow:0 40px 80px -30px #202b494d,0 4px 12px #00000015;scroll-margin-top:95px;overflow:hidden}.window-bar{height:45px;background:linear-gradient(#282b33,#22252c);border-bottom:1px solid 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p{font-size:15px;color:#6e6e73;margin:22px 0 27px}.cta .btn{font-size:14px;padding:12px 23px}footer{border-top:1px solid #d2d2d7;display:flex;justify-content:space-between;gap:30px;padding:25px 0 35px;font-size:10px;color:#86868b;line-height:1.8}.skip{position:absolute;left:12px;top:-90px;background:#0071e3;color:#fff;padding:10px;z-index:100}.skip:focus{position:fixed;top:8px}:focus-visible{outline:3px solid #1586fa;outline-offset:4px}[hidden]{display:none!important}#note-form{scroll-margin-top:100px}#note-symbol{color:#b7d6ff}@media(min-width:1450px){.hero{padding-top:100px}}@media(max-width:1000px){main{padding:0 28px}.workspace-content{padding:18px}.workspace-grid{grid-template-columns:minmax(0,1fr) 250px}.feature{padding:25px}.feature h3{font-size:25px}.section-top p{font-size:13px}h2{font-size:40px}}@media(max-width:760px){header{height:60px;padding:0 20px}nav{display:none}.brand small{font-size:9px}main{padding:0 18px}.hero{padding:58px 0 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/* Locale controls and layouts for longer translations. */
.header-actions{display:flex;align-items:center;gap:18px}.language-control{display:flex;gap:6px;align-items:center;color:#515154;font-size:15px}.language-control select{font:12px/1.5 inherit;font-family:inherit;font-size:12px;max-width:122px;border:0;background:transparent;color:#424245;padding:6px 20px 6px 2px;cursor:pointer;border-radius:5px}.language-control select option{background:#fff;color:#1d1d1f}html:not([lang^="zh"]) h1{font-size:clamp(45px,6vw,80px);letter-spacing:-2.5px}html:not([lang^="zh"]) .workspace h2{font-size:22px}html:not([lang^="zh"]) .feature h3{font-size:27px}html:not([lang^="zh"]) h2{font-size:42px}html:not([lang^="zh"]) .chart-top{flex-wrap:wrap}.workspace-top>.caption{flex-shrink:0;max-width:36%}.tabs button,.small-btn{white-space:normal}.sidebar input,.sidebar textarea{min-width:0}.header-actions>.btn{white-space:nowrap}html[lang="ko"]{word-break:keep-all;overflow-wrap:anywhere}@media(max-width:1060px){nav{gap:18px}.header-actions{gap:12px}header{gap:15px;padding-left:22px;padding-right:22px}}@media(max-width:900px){nav{display:none}}@media(max-width:760px){.header-actions{gap:10px}.brand small{display:none}.language-control{gap:2px}.language-control select{font-size:11px;padding-right:13px;max-width:105px}.header-actions>.btn{font-size:11px;padding:7px 12px}.workspace-top>.caption{max-width:none}html:not([lang^="zh"]) h1{font-size:47px;letter-spacing:-1.8px}html:not([lang^="zh"]) h2{font-size:32px}html:not([lang^="zh"]) .workspace h2{font-size:20px}.actions{gap:20px}html[lang="es"] .lead{font-size:17px}.notes-head{align-items:start}.notes-head>.small-btn{max-width:45%}}@media(max-width:380px){header{padding:0 12px;gap:8px}.brand{font-size:18px}.brand i{font-size:21px;margin-right:5px}.header-actions{gap:6px}.language-control>span{display:none}.hero .actions{gap:15px}.hero .actions .btn{padding:12px 16px}.text-link{font-size:13px}}

/* Readability and touch-target refinements. */
.hero-description{max-width:660px;text-wrap:pretty}.chart-meta{font-size:11px}.notice-box{font-size:11px}.small-btn{min-height:34px}.sidebar .fine{font-size:11px}.chart-meta .small-btn{min-height:30px}.notes-head{align-items:center}.note-list{align-items:start}
@media(max-width:760px){.hero-description{max-width:420px;font-size:18px;line-height:1.6}.small-btn,.tabs button,.watch-items button,.chart-top .small-btn,.chart-meta .small-btn{min-height:44px;padding:9px 12px;font-size:12px}.tabs{gap:8px}.tabs button{flex-grow:1}.chart-top{flex-wrap:wrap;align-items:center}.chart-top h3{font-size:14px}.chart-top p,.workspace .fine,.chart-meta,.notice-box,.workspace-top>.caption{font-size:12px}.sidebar label,.sidebar input,.sidebar textarea{font-size:14px}.sidebar .btn{min-height:44px;font-size:14px}.watch-items{gap:8px}.chart-meta{line-height:1.8}.header-actions>.btn,.language-control select{min-height:44px}.language-control select{font-size:12px}.note time{font-size:11px}.note p{font-size:14px}.toast{font-size:12px}.empty{font-size:12px}.notes-head>.small-btn{max-width:46%}.hero .fine{font-size:12px}.product-caption span{font-size:11px}.window-bar{font-size:10px}footer{font-size:11px}.note-actions{gap:10px}html:not([lang^="zh"]) .workspace h2{line-height:1.4}}
/* Focused research positioning and first-use guidance. */
.hero{padding-bottom:42px}.hero h1{font-size:clamp(42px,5.3vw,72px);letter-spacing:-2.8px}.hero-description{max-width:720px;font-size:21px}.review-flow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px;max-width:1050px;margin:0 auto 44px;padding:24px 6px;scroll-margin-top:85px}.review-flow article{border-top:1px solid #dcdce1;padding-top:18px}.step-number{font-size:11px;font-weight:650;color:#0071e3;letter-spacing:1px}.review-flow h3{font-size:17px;line-height:1.4;letter-spacing:-.3px;margin:10px 0 8px}.review-flow p{font-size:12px;color:#6e6e73;line-height:1.8;margin:0}.note-label-row{display:flex;align-items:center;flex-wrap:wrap;justify-content:space-between;gap:5px;margin:15px 0 6px}.note-label-row label{margin:0}.prompt-button{background:transparent;color:#b7d6ff;border:0;padding:5px 0;font-size:11px;text-align:left;text-decoration:underline;text-underline-offset:3px;min-height:32px}.prompt-button:hover{color:white}html:not([lang^="zh"]) .hero h1{font-size:clamp(42px,5.3vw,72px)}@media(max-width:760px){.hero,html:not([lang^="zh"]) .hero{padding-bottom:22px}.hero h1,html:not([lang^="zh"]) .hero h1{font-size:43px;letter-spacing:-1.7px;line-height:1.18}.hero-description{font-size:18px}.review-flow{grid-template-columns:1fr;gap:18px;margin-bottom:30px;padding:12px 10px}.review-flow article{position:relative;padding:16px 0 0 36px}.review-flow .step-number{position:absolute;left:0;top:19px}.review-flow h3{margin:0 0 5px;font-size:16px}.review-flow p{font-size:13px}.prompt-button{min-height:44px;font-size:12px}.brand{font-size:19px;letter-spacing:.5px}}@media(max-width:380px){.hero h1,html:not([lang^="zh"]) .hero h1{font-size:37px}.brand{font-size:17px}.header-actions{gap:4px}}
.analytics-choice{position:fixed;bottom:20px;left:20px;z-index:50;max-width:380px;padding:23px;background:#fff;color:#1d1d1f;border:1px solid #d2d2d7;border-radius:18px;box-shadow:0 12px 45px #0002;font-size:13px}.analytics-choice strong{font-size:16px}.analytics-choice p{color:#6e6e73;line-height:1.7}.analytics-choice>div{display:flex;gap:10px}.analytics-choice button{min-height:44px;border-radius:22px;padding:9px 20px;border:1px solid #d2d2d7;background:#fff;color:#1d1d1f}.analytics-choice [data-allow]{background:#0071e3;border-color:#0071e3;color:#fff}.analytics-preference{background:none;color:#6e6e73;border:0;text-decoration:underline;font-size:11px;cursor:pointer;padding:8px 0}footer{flex-wrap:wrap}@media(max-width:450px){.analytics-choice{left:12px;right:12px;bottom:12px;max-width:none}}