:root{--bg:#fff;--ink:#292b29;--muted:#747771;--brand:#25765d;--line:#e7e7e2;--card:#fff}
body{font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;line-height:1.7}
header{position:fixed;inset:0 auto 0 0;width:232px;background:#f6f6f3;border-right:1px solid var(--line);z-index:5}
header .wrap{padding:28px 18px;height:100%;display:flex;flex-direction:column}
.top{display:block}.brand{font-size:18px;letter-spacing:-.6px}.brand::before{content:'◈';color:var(--brand);font-size:25px;display:block;margin-bottom:8px}.brand small{font-size:11px;margin-top:6px;line-height:1.5}
#language{margin-top:20px;padding:5px 13px;font-size:12px;background:transparent}
nav{flex-direction:column;gap:5px;margin-top:36px}nav a{color:#676b64;padding:10px 13px;border-radius:7px;font-size:14px;font-weight:500}nav a:hover,nav a.active{background:#e7ece5;color:#215c48}nav a::before{content:'▤';margin-right:12px;font-size:15px}
.side-future{margin-top:36px;border-top:1px solid var(--line);padding-top:22px;font-size:11px;color:var(--muted);letter-spacing:1px}.side-future a{display:block;text-decoration:none;color:var(--muted);font-size:13px;letter-spacing:0;margin:18px 0}.side-future span{font-size:10px;border:1px solid #ddd;padding:2px 5px;border-radius:4px;margin-left:4px}
.side-bottom{margin-top:auto;padding-top:25px;font-size:11px;color:var(--muted)}
main.wrap{margin-left:232px;max-width:1250px;padding:38px 6vw}.hero{padding:14px 0 24px;border-bottom:1px solid var(--line)}.eyebrow{font-size:10px;letter-spacing:2px;color:#8b9187}h1{font-size:clamp(30px,4vw,44px);font-weight:650;letter-spacing:-1.7px}h2{font-size:23px;font-weight:650}h3{font-weight:600}.hero .muted{font-size:15px;max-width:660px}
.notice{background:#fafaf7;border:1px solid var(--line);border-left:3px solid #c2c8b7;color:#75796f;font-size:12px;padding:12px 16px;margin-top:24px}
section{margin:40px 0 56px}.tag{font-size:11px;border:0;background:#edf3ed;color:#52715c;border-radius:5px;padding:3px 8px}.card{border-radius:10px}.manager{background:transparent;border:0;padding:0;margin:24px 0 12px}.manager h3{display:none}#storageHint{font-size:11px;max-width:740px;margin-bottom:14px}button{border-radius:7px;padding:9px 15px;font-size:13px}button.primary{background:#2b775f}button:hover{filter:brightness(.97)}.manager-actions{gap:8px}#managerStatus:empty{display:none}#managerStatus{font-size:12px}.tools{margin-top:24px}input[type=search],select{font-size:13px;background:#fafbf9}#search{padding-left:16px}#count{font-size:12px}
#cards.grid{display:flex;flex-direction:column;gap:0;border-top:1px solid var(--line);margin-top:12px}
#cards article{position:relative;border:0;border-bottom:1px solid var(--line);border-radius:0;padding:22px 120px 22px 48px;cursor:pointer;background:white;transition:background .12s}
#cards article::before{content:'▧';position:absolute;left:9px;top:28px;font-size:21px;color:#8c9c90}#cards article:hover{background:#f8faf7}#cards article summary{font-size:17px;list-style:none;margin:7px 0;line-height:1.5}#cards article summary::after{content:'↗';color:#a2aba1;font-weight:400;margin-left:12px}#cards article summary::-webkit-details-marker{display:none}
#cards details>:not(summary){display:none}#cards .note-actions{position:absolute;right:4px;top:28px;gap:5px}#cards .note-actions button{border:0;background:transparent;padding:5px;font-size:12px}#cards .muted{font-size:11px;margin:4px 0}.row-preview{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin:4px 0!important}
.note-form{background:#f8faf7;padding:24px;border:1px solid var(--line);border-radius:10px}.note-form h3{display:block}.form-grid input,.form-grid textarea{font-size:14px}.math-help{font-size:12px;color:#677567;margin-bottom:20px}
.lab{grid-template-columns:270px minmax(0,1fr);border:1px solid var(--line);background:#fcfdfb}.formula{background:#f2f6f1;font-family:inherit;font-size:17px;padding:18px;overflow-x:auto}.katex-display{margin:.5em 0!important;overflow-x:auto;overflow-y:hidden;padding:4px 0}.katex{font-size:1.12em}.result{background:#eaf3ea;font-size:14px}
.reader{width:min(1060px,calc(100vw - 48px));max-height:90vh;border:1px solid var(--line);border-radius:14px;padding:0;color:var(--ink);box-shadow:0 24px 100px #10221b26}.reader::backdrop{background:#24372e55;backdrop-filter:blur(3px)}.reader-toolbar{position:sticky;top:0;z-index:2;background:#fff;border-bottom:1px solid var(--line);padding:15px 24px;display:flex;align-items:center;justify-content:space-between;gap:12px}.reader-toolbar span{font-size:12px;color:var(--muted)}.reader-main{padding:40px 64px 64px;max-width:100%;overflow-wrap:anywhere}.reader-main h2{font-size:32px;line-height:1.35;letter-spacing:-.8px;margin:14px 0 28px}.reader-main p{font-size:17px;line-height:1.95}.reader-main .muted{font-size:13px}.reader-main .note-body{white-space:pre-wrap}.reader-main .formula{margin:28px 0}.reader-main .katex-display{white-space:normal}.reader-meta{align-items:center;display:flex;gap:9px;flex-wrap:wrap}.reader-main .note-actions{margin-top:30px}.reader-main pre{white-space:pre-wrap}.roadmap-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.roadmap-grid article{background:#f8f9f6}.roadmap-grid h3{font-size:16px}.roadmap-grid p{font-size:13px;color:var(--muted)}.roadmap-grid button{cursor:not-allowed}.roadmap-grid .tag{background:#eceee9;color:#72796d}
@media(min-width:1500px){main.wrap{margin-left:max(232px,calc((100vw - 1018px)/2))}}
@media(max-width:1000px){header{width:190px}main.wrap{margin-left:190px;padding:28px}.lab{grid-template-columns:1fr}.roadmap-grid{grid-template-columns:1fr}}
@media(max-width:760px){header{position:relative;width:100%;border-right:0;border-bottom:1px solid var(--line)}header .wrap{padding:16px 20px}.top{display:flex}.brand::before{display:none}.brand small{display:none}.brand{font-size:17px}#language{margin:0}nav{flex-direction:row;margin-top:12px;gap:5px}nav a{font-size:12px;padding:6px 10px}nav a::before{display:none}.side-future,.side-bottom{display:none}main.wrap{margin:0;padding:24px 20px}h1{font-size:32px}.hero{padding-top:0}.manager-actions button{flex:initial}.grid,.lab{grid-template-columns:1fr}#cards article{padding:17px 0 17px 34px}#cards article::before{left:0;top:23px}#cards article summary{font-size:16px}#cards .note-actions{position:static;margin:8px 0 0}#cards .note-actions button{padding:4px 12px;background:#f3f5f0}.reader{width:calc(100vw - 16px);max-height:95vh}.reader-main{padding:24px 20px 36px}.reader-main h2{font-size:26px}.reader-main p{font-size:16px}.reader-toolbar{padding:12px 16px}.note-form{padding:16px}.lab{padding:16px}.roadmap-grid{grid-template-columns:1fr}}