@charset "UTF-8";
:root{--bg:#12151b;--panel:#191e27;--panel-hover:#1e2430;--text:#f0f2f7;--muted:#939bab;--subtle:#687385;--line:#2a303b;--blue:#80aaff;--blue-solid:#367cf5;--chip:#222a38;--input:#1a1f29;--shadow:0 24px 80px #0006;color-scheme:dark;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-synthesis:none}
:root[data-theme="light"]{--bg:#f8f9fc;--panel:#fff;--panel-hover:#f2f5fb;--text:#192333;--muted:#5c687b;--subtle:#6c788b;--line:#dce2ec;--blue:#245ccb;--blue-solid:#2867df;--chip:#e8efff;--input:#f0f3f9;--shadow:0 24px 80px #172f5b20;color-scheme:light}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:32px}body{margin:0;background:var(--bg);color:var(--text);font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased}button,input,a{-webkit-tap-highlight-color:transparent}button,input{font:inherit}button,a{touch-action:manipulation}a{color:inherit;text-decoration:none}button{color:inherit;cursor:pointer}button:disabled{cursor:default}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--blue);outline-offset:5px}button{border:0}svg{display:block;width:20px;height:20px;flex:none}::selection{background:#467ce080;color:#fff}[hidden]{display:none!important}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:8px;left:12px;z-index:20;transform:translateY(-200%);padding:10px 18px;border-radius:8px;background:var(--blue-solid);color:white}.skip-link:focus{transform:translateY(0)}
.page-shell{width:min(1160px,calc(100% - 104px));margin:0 auto}.site-header{height:106px;display:flex;align-items:center;border-bottom:1px solid var(--line);gap:40px}.brand{display:flex;align-items:center;gap:12px;font-size:23px;font-weight:650;letter-spacing:2px;line-height:1.15}.brand-en{display:block;color:var(--muted);font-size:8px;letter-spacing:2px;margin-top:6px}.brand-mark{width:40px;height:42px;background:var(--blue-solid);border-radius:12px;display:flex;flex-direction:column;justify-content:center;gap:5px;padding:12px;transform:rotate(-5deg)}.brand-mark i{display:block;height:2px;background:#fff;border-radius:2px}.brand-mark i:nth-child(2){width:75%}.brand-mark i:nth-child(3){width:45%}.main-nav{margin-left:auto;display:flex;gap:33px;font-size:14px;color:var(--muted)}.main-nav a:hover,.text-link:hover{color:var(--blue)}.nav-active{color:var(--text);position:relative}.nav-active:after{content:"";position:absolute;bottom:-11px;left:50%;width:4px;height:4px;border-radius:50%;background:var(--blue)}.icon-button{background:transparent;display:flex;align-items:center;justify-content:center;min-width:42px;min-height:42px;border-radius:10px}.icon-button:hover{background:var(--chip)}.theme-button{gap:8px;color:var(--muted);margin-left:12px}.theme-label{font-size:12px}.theme-button svg{width:18px;height:18px}
.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:55px;align-items:center;min-height:605px;padding:64px 0 58px}.eyebrow{color:var(--muted);font-size:10px;font-weight:600;letter-spacing:2.2px;margin:0 0 24px;display:flex;align-items:center;gap:10px}.tiny-square{width:6px;height:6px;background:var(--blue);border-radius:1px}h1,h2,h3,p{overflow-wrap:anywhere}h1{margin:0;font-size:clamp(46px,4.8vw,66px);line-height:1.25;letter-spacing:-2.5px;font-weight:650}.blue-dot{color:var(--blue)}.hero-description{font-size:15px;line-height:1.95;color:var(--muted);margin:24px 0 28px}.hero-actions{display:flex;align-items:center;gap:25px}.button{display:inline-flex;align-items:center;justify-content:center;gap:25px;min-height:47px;padding:11px 22px;border-radius:8px;font-size:13px;font-weight:550}.button-primary{background:var(--blue-solid);color:white;box-shadow:0 5px 22px #2760d52b}.button-primary:hover{background:#2468e1}.button-primary span{font-size:19px;line-height:1}.button-outline{background:transparent;border:1px solid var(--line);color:var(--text)}.button-outline:hover{background:var(--chip)}.text-link{background:transparent;font-size:13px;padding:0;display:inline-flex;align-items:center;gap:13px}.hero-footnote{margin:36px 0 0;color:var(--muted);font-size:11px;display:flex;align-items:center;gap:10px}.hero-footnote>span{font-size:23px;line-height:1;color:var(--blue)}
.hero-art{height:418px;position:relative;display:grid;place-items:center;isolation:isolate;background:radial-gradient(ellipse at center,#467cee12,transparent 68%)}.orbit{position:absolute;width:365px;height:365px;border:1px solid var(--line);border-radius:50%;z-index:-1}.orbit-two{width:445px;height:445px;border-style:dashed;opacity:.5}.art-cross{position:absolute;color:var(--subtle);font-size:21px;font-weight:200}.cross-one{top:25px;left:34px}.cross-two{bottom:54px;right:4px}.note-cover{width:274px;height:330px;border-radius:7px 18px 18px 7px;background:#bfd3f8;box-shadow:inset 9px 0 0 #8caadb,inset 11px 0 0 #e7efff55,18px 25px 60px #0003;transform:rotate(-9deg);padding:25px 26px 22px 31px;color:#223e70;position:relative}.note-cover:after{content:"";position:absolute;top:2px;right:2px;bottom:2px;width:5px;border-radius:0 14px 14px 0;background:#f5f7ff80}.cover-top,.cover-bottom{display:flex;align-items:center;justify-content:space-between;font-size:8px;font-weight:600;letter-spacing:1.2px}.cover-lines{display:flex;gap:6px;margin-top:40px}.cover-lines i{width:18px;height:18px;border:1px solid #47699a;border-radius:50%}.cover-lines i:nth-child(2){background:#5478ac}.cover-lines i:nth-child(3){border-style:dashed}.note-cover p{font-family:"Songti SC","STSong",serif;font-size:31px;line-height:1.5;font-weight:700;letter-spacing:1px;margin:17px 0 0}.note-cover p span{color:#4874b8}.cover-bottom{position:absolute;bottom:24px;left:31px;right:26px;font-size:6px;letter-spacing:1px}.cover-bottom>span:last-child{font-size:24px;line-height:1}.art-label{position:absolute;bottom:-6px;left:50%;transform:translateX(-50%);white-space:nowrap;background:var(--bg);padding:0 15px;font-size:9px;letter-spacing:1.8px;color:var(--muted);display:flex;gap:9px;align-items:center}.label-dot{height:4px;width:4px;border-radius:50%;background:var(--blue)}.divider-note{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding:19px 0;color:var(--muted);font-size:11px}.divider-note>span:last-child{font-size:8px;letter-spacing:1.5px}
.notes-section{padding:62px 0 74px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:25px}.section-heading .eyebrow{margin-bottom:10px;font-size:9px}h2{font-size:27px;font-weight:550;letter-spacing:-.6px;margin:0}.small-count{font-size:11px;color:var(--muted);vertical-align:top;display:inline-block;margin:4px 0 0 11px;letter-spacing:0;font-weight:400}.search-box{background:var(--input);border:1px solid var(--line);border-radius:8px;padding:9px 13px;display:flex;align-items:center;gap:10px;width:218px;min-height:42px;color:var(--muted)}.search-box:focus-within{border-color:var(--blue)}.search-box svg{width:16px;height:16px}.search-box input{background:transparent;border:0;min-width:0;width:100%;outline:none;color:var(--text);font-size:12px}.search-box input::placeholder{color:var(--muted)}.search-box input:focus-visible{outline:0}.note-toolbar{display:flex;align-items:center;justify-content:space-between;margin:29px 0 25px;gap:16px}.filters{display:flex;gap:7px;flex-wrap:wrap}.filter{min-height:36px;border-radius:7px;padding:7px 15px;font-size:12px;background:transparent;color:var(--muted);border:1px solid transparent}.filter:hover{color:var(--text);background:var(--panel)}.filter.active{background:var(--chip);color:var(--blue);border-color:var(--line)}.filter span{font-size:10px;margin-left:7px;opacity:.75}.sample-label{font-size:10px;color:var(--muted)}.note-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:23px}.note-card{min-width:0;background:var(--panel);border:1px solid var(--line);border-radius:12px;overflow:hidden;position:relative;transition:transform .2s,border-color .2s}.note-card:hover{transform:translateY(-4px);border-color:var(--subtle)}.card-art{height:185px;overflow:hidden;position:relative}.card-art-one{background:#d7ddcf;display:flex;align-items:center;justify-content:center;gap:18px}.paper-sheet{background:#fcfcf6;width:85px;height:114px;transform:rotate(-12deg);box-shadow:5px 8px 15px #56604626;padding:21px 12px;display:block}.paper-sheet i{height:2px;background:#c6cec2;display:block;margin-bottom:8px}.paper-sheet i:nth-child(2){width:65%}.paper-sheet i:nth-child(3){width:82%}.paper-sheet b{font-size:32px;line-height:1;display:block;color:#607258;text-align:right;margin-top:16px;font-weight:300}.card-art-word{font-weight:750;font-size:22px;line-height:1.3;color:#607258;letter-spacing:-1px}.card-art-two{background:#bcc9e1;display:grid;place-items:center}.mini-window{background:#29354b;border:1px solid #4e6180;border-radius:8px;width:195px;height:119px;box-shadow:5px 9px 0 #8da2c269;transform:rotate(-3deg)}.window-dots{display:flex;gap:4px;padding:10px;border-bottom:1px solid #ffffff15}.window-dots i{width:4px;height:4px;background:#96a8c2;border-radius:50%}.code-lines{display:flex;flex-direction:column;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:10px;padding:13px 17px;color:#b9c9e5;gap:4px}.code-lines b{color:#e2e9f6;padding-left:16px;font-weight:400}.art-index{position:absolute;right:14px;bottom:10px;font-size:7px;letter-spacing:1.5px;color:#3b506e}.card-art-three{background:#ded1c4}.abstract-disc{position:absolute;width:133px;height:133px;border-radius:50%;top:30px;left:calc(50% - 100px)}.disc-back{background:#a47c5d}.disc-front{background:#e4d5c4;left:calc(50% - 24px);top:20px;box-shadow:-1px 0 0 #f5ede4}.spark{position:absolute;right:57px;top:49px;font-size:70px;font-weight:300;color:#947054;line-height:1}.card-art-three .art-index{color:#755b46}.card-body{padding:22px 23px 17px}.card-meta{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:10px}.category{display:flex;align-items:center;gap:6px}.category i{width:4px;height:4px;background:var(--blue);border-radius:50%}.card-body h3{font-size:18px;line-height:1.5;margin:14px 0 9px;font-weight:550;letter-spacing:-.25px}.card-body h3 button{text-align:left;padding:0;background:transparent;line-height:inherit;font-weight:inherit;font-size:inherit}.card-body h3 button:after{content:"";position:absolute;inset:0;z-index:1}.card-body h3 button:focus-visible{outline:0}.note-card:focus-within{outline:3px solid var(--blue);outline-offset:4px}.card-body>p{font-size:12px;line-height:1.9;color:var(--muted);margin:0;min-height:46px}.card-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);margin-top:22px;padding-top:13px;font-size:10px;color:var(--muted)}.card-bottom>span:last-child{font-size:19px;line-height:1;color:var(--text)}.empty-state{padding:55px 15px;text-align:center;background:var(--panel);border:1px dashed var(--line);border-radius:12px}.empty-state>span{font-size:38px;color:var(--blue)}.empty-state h3{font-size:18px;font-weight:500;margin:10px 0}.empty-state p,.noscript-note{font-size:13px;color:var(--muted)}.empty-state .button{margin-top:15px}
.about-section{border:1px solid var(--line);border-radius:12px;padding:42px 45px;display:grid;grid-template-columns:220px 1fr;gap:52px;background:linear-gradient(110deg,var(--panel),var(--bg));margin-bottom:66px}.about-symbol{font-family:"Songti SC","STSong",serif;font-size:82px;line-height:1.1;display:flex;align-items:center;justify-content:center;flex-direction:column;color:var(--blue);border-right:1px solid var(--line);padding-right:40px}.about-symbol>span{font-family:Inter,sans-serif;font-size:7px;letter-spacing:1.5px;color:var(--muted);margin-top:20px}.about-copy .eyebrow{font-size:8px;margin-bottom:12px}.about-copy h2{font-size:23px}.about-copy>p:not(.eyebrow){font-size:12px;line-height:1.9;color:var(--muted);margin:13px 0 19px}.about-copy .text-link{font-size:11px}.site-footer{display:flex;justify-content:space-between;gap:18px;border-top:1px solid var(--line);padding:25px 0 34px;font-size:10px;color:var(--muted)}.footer-separator{margin:0 9px;color:var(--subtle)}.site-footer a:hover{color:var(--blue)}
.content-dialog{background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:16px;padding:45px;width:min(650px,calc(100% - 32px));max-height:calc(100dvh - 48px);box-shadow:var(--shadow);overflow-y:auto}.content-dialog::backdrop{background:#080c14b8;backdrop-filter:blur(6px)}.dialog-close{position:absolute;right:12px;top:12px;color:var(--muted);font-size:27px;font-weight:300}.content-dialog .eyebrow{margin:4px 0 16px;font-size:9px}.content-dialog h2{font-size:28px;line-height:1.5;margin-bottom:25px}.article-content{color:var(--muted);font-size:14px;line-height:2}.article-content p{margin:0 0 18px}.dialog-footnote{font-size:11px;color:var(--muted);border-top:1px solid var(--line);padding-top:18px;margin:26px 0 0;line-height:1.8}.site-dialog{max-width:510px}.site-details{margin:0}.site-details>div{padding:14px 0;border-bottom:1px solid var(--line)}.site-details dt{font-size:11px;color:var(--muted);margin-bottom:5px}.site-details dd{font-size:14px;overflow-wrap:anywhere;margin:0}.site-dialog .dialog-footnote{border:0;margin-top:12px;padding:0}
@media(min-width:1500px){.hero{min-height:650px}.page-shell{width:min(1200px,calc(100% - 120px))}.hero-art{transform:scale(1.04)}}
@media(max-width:1000px){.page-shell{width:calc(100% - 64px)}.hero{gap:20px;min-height:560px}.hero-art{transform:scale(.85);transform-origin:center}.hero-description{font-size:13px}.hero-actions{gap:18px}.note-grid{gap:16px}.card-body{padding:18px 17px 16px}.card-art{height:160px}.card-art-word{font-size:17px}.card-art-one{gap:12px}.paper-sheet{width:70px;height:100px;padding:15px 10px}.mini-window{width:170px}.about-section{grid-template-columns:170px 1fr;gap:35px;padding:35px}.about-symbol{padding-right:30px}.card-body h3{font-size:16px}.spark{right:28px}}
@media(max-width:760px){.page-shell{width:calc(100% - 40px)}.site-header{height:86px;gap:24px}.brand{font-size:21px}.brand-mark{width:36px;height:38px;padding:10px}.main-nav{gap:21px}.theme-button{margin-left:0}.theme-label{display:none}.hero{grid-template-columns:1fr;gap:10px;padding:52px 0 32px;min-height:0}.hero-copy{max-width:560px}.hero h1{font-size:57px;letter-spacing:-2px}.hero-description{font-size:14px}.hero-art{height:360px;transform:scale(.83);margin:-5px 0 -15px}.hero-footnote{margin-top:28px}.divider-note>span:last-child{font-size:7px;letter-spacing:.6px}.divider-note{font-size:10px}.notes-section{padding:43px 0 48px}.note-grid{grid-template-columns:1fr;gap:22px}.note-card{display:grid;grid-template-columns:39% 1fr}.card-art{height:100%;min-height:218px}.card-art-one{flex-direction:column;gap:6px}.paper-sheet{width:65px;height:88px;padding:12px 10px}.paper-sheet b{font-size:24px;margin-top:6px}.card-art-word{font-size:16px}.mini-window{width:135px;height:113px;transform:rotate(-6deg)}.code-lines{padding:12px 8px;font-size:8px}.code-lines b{padding-left:5px}.abstract-disc{width:106px;height:106px;top:55px;left:calc(50% - 72px)}.disc-front{left:calc(50% - 5px);top:40px}.spark{font-size:49px;right:12px;top:69px}.card-body{padding:20px}.card-body h3{font-size:17px}.card-body>p{font-size:12px;min-height:0}.card-bottom{margin-top:18px}.search-box{width:175px}.section-heading h2{font-size:25px}.about-section{grid-template-columns:100px 1fr;gap:25px;padding:28px 22px;margin-bottom:45px}.about-symbol{font-size:58px;padding-right:22px}.about-symbol>span{font-size:5px;letter-spacing:.5px;text-align:center;line-height:1.8}.about-copy h2{font-size:18px}.about-copy>p:not(.eyebrow){font-size:11px}.about-copy .eyebrow{font-size:7px;letter-spacing:1px}.about-copy br{display:none}.site-footer{font-size:9px}.footer-separator{margin:0 5px}}
@media(max-width:440px){.page-shell{width:calc(100% - 36px)}.main-nav{gap:17px;font-size:12px}.site-header{gap:15px}.brand{font-size:19px;gap:9px}.brand-en{font-size:6px}.hero{padding-top:40px}.hero h1{font-size:53px}.hero .eyebrow{font-size:8px;letter-spacing:1.7px}.hero-art{transform:scale(.72);height:330px;margin:-10px -10px -22px}.hero-description{font-size:13px}.hero-actions{gap:20px}.hero-actions .text-link{font-size:12px}.button{padding:10px 18px}.divider-note>span:last-child{display:none}.section-heading{align-items:start;flex-direction:column;gap:20px}.search-box{width:100%}.note-toolbar{margin-top:20px;align-items:start;flex-direction:column;gap:12px}.filter{padding:6px 13px}.sample-label{font-size:9px}.note-card{grid-template-columns:1fr}.card-art{height:185px;min-height:0}.card-art-one{flex-direction:row;gap:25px}.card-art-word{font-size:24px}.paper-sheet{width:85px;height:114px;padding:21px 12px}.paper-sheet b{margin-top:13px;font-size:32px}.mini-window{width:200px;height:124px}.code-lines{font-size:10px;padding:15px 18px;gap:5px}.code-lines b{padding-left:14px}.abstract-disc{width:133px;height:133px;top:30px;left:calc(50% - 100px)}.disc-front{left:calc(50% - 24px);top:20px}.spark{font-size:70px;right:60px;top:49px}.card-body{padding:22px}.card-body h3{font-size:19px}.about-section{grid-template-columns:1fr;gap:25px;padding:28px}.about-symbol{font-size:50px;border-right:0;border-bottom:1px solid var(--line);padding:0 0 22px;align-items:start;flex-direction:row;gap:20px}.about-symbol>span{margin-top:27px;font-size:7px;letter-spacing:1px}.about-copy h2{font-size:21px}.about-copy>p:not(.eyebrow){font-size:12px}.site-footer{flex-wrap:wrap;gap:12px}.content-dialog{padding:38px 24px 25px}.content-dialog h2{font-size:24px}}
.orbit{width:min(365px,100%);height:auto;aspect-ratio:1}.orbit-two{width:min(445px,calc(100% + 34px))}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}