:root{--paper:#fffdf7;--page:#f5f1e8;--ink:#302f28;--muted:#66675b;--green:#536344;--soft:#e6eadb;--line:#dadccd;--red:#983e35;color-scheme:light}
*{box-sizing:border-box}body{margin:0;background:var(--page);color:var(--ink);font:16px/1.7 "Microsoft YaHei",system-ui,sans-serif}header{padding:22px max(24px,calc((100vw - 1160px)/2));display:flex;gap:24px;align-items:center;justify-content:space-between;background:var(--paper);border-bottom:1px solid var(--line);flex-wrap:wrap}.brand{font-size:23px;letter-spacing:1px;text-decoration:none;color:var(--ink);font-weight:650}.brand span{color:var(--green);margin-left:8px}nav{display:flex;gap:12px;align-items:center;flex-wrap:wrap}main{max-width:1160px;margin:0 auto;padding:36px 24px 60px;min-height:75vh}h1{font:600 32px/1.4 Georgia,"SimSun",serif;margin:0 0 12px}h2{font-size:22px;font-weight:600;margin:0 0 18px}h3{font-size:18px;margin:0 0 8px}p{margin:8px 0}.muted{color:var(--muted)}.small{font-size:13px;color:var(--muted)}.intro{padding:28px;background:var(--soft);margin-bottom:28px;border-radius:5px}.intro p{max-width:700px}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.course{padding:24px;background:var(--paper);border-top:3px solid var(--green)}.cover{font:500 25px/1.5 Georgia,"SimSun",serif;color:var(--green);padding:20px 0;margin-bottom:20px;border-bottom:1px solid var(--line)}button,.button{font:inherit;color:var(--green);border:1px solid var(--line);padding:9px 16px;background:var(--paper);border-radius:5px;cursor:pointer;text-decoration:none;display:inline-block}button:hover,.button:hover{background:var(--soft)}button.primary,.button.primary{background:var(--green);color:var(--paper);border-color:var(--green)}button:disabled{opacity:.5;cursor:wait}button.danger{color:var(--red)}button.active{background:var(--soft);border-color:var(--green)}a{color:var(--green)}:focus-visible{outline:3px solid #a89960;outline-offset:3px}input,select{font:inherit;width:100%;border:1px solid var(--line);border-radius:5px;background:var(--paper);color:var(--ink);padding:10px 12px}label{display:block;font-size:14px;margin-bottom:14px}label input,label select{margin-top:6px}form{margin:0}.auth{max-width:440px;margin:24px auto;padding:32px;background:var(--paper);border-top:3px solid var(--green)}.auth form{margin-top:24px}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.between{justify-content:space-between}.space{margin-top:20px}.pill{font-size:13px;padding:3px 8px;background:var(--soft);color:var(--green);display:inline-block}.track{height:5px;background:var(--soft);margin:20px 0 8px}.track i{height:100%;display:block;background:var(--green)}.layout{display:grid;grid-template-columns:270px minmax(0,1fr);gap:24px}.panel{background:var(--paper);padding:24px}.lessons{display:flex;flex-direction:column;gap:8px}.lessons button{text-align:left;font-size:14px}.lesson-meta{display:block;font-size:12px;color:var(--muted)}video{width:100%;background:#151b18;max-height:65vh}.empty{padding:36px 20px;text-align:center;background:var(--soft);color:var(--muted)}.materials a{display:block;padding:12px 0;border-bottom:1px solid var(--line);overflow-wrap:anywhere}.tabs{margin-bottom:24px}.admin-item{padding:24px;background:var(--paper);margin-bottom:18px;border-left:3px solid var(--green)}.grant{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr) auto;align-items:end;gap:12px;margin:18px 0}.grant label{margin:0}.report{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;padding:10px;border-bottom:1px solid var(--line)}details{margin-top:18px}summary{cursor:pointer;color:var(--green)}.upload-row{margin:16px 0;padding-top:16px;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr auto;gap:12px;align-items:end}.upload-row label{margin:0}.error{color:var(--red);min-height:1.7em}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);padding:12px 22px;max-width:90%;background:var(--green);color:var(--paper);border-radius:6px;display:none;z-index:10}footer{font-size:13px;text-align:center;padding:24px;color:var(--muted)}.number{letter-spacing:2px;color:var(--muted);font-size:13px}.account{font-size:13px}.audit{white-space:pre-wrap;overflow-wrap:anywhere;font-size:14px}progress{width:100%;height:14px;accent-color:var(--green)}
@media(max-width:800px){.grid{grid-template-columns:1fr}.layout{grid-template-columns:1fr}.grant{grid-template-columns:1fr 1fr}.grant button{grid-column:1/-1}header{padding:18px 20px}.account{display:none}main{padding:24px 16px}h1{font-size:27px}.auth{padding:24px}.upload-row{grid-template-columns:1fr}.panel,.admin-item{padding:20px}nav{gap:8px}nav button{font-size:14px;padding:7px 10px}}
.course-progress{display:block;height:5px;margin:20px 0 8px;border:0;background:var(--soft);appearance:none}.course-progress::-webkit-progress-bar{background:var(--soft)}.course-progress::-webkit-progress-value{background:var(--green)}.course-progress::-moz-progress-bar{background:var(--green)}
footer{padding:28px 20px 32px;border-top:1px solid var(--line)}.footer-brand{font-size:15px;color:var(--green);margin:0 0 6px}.footer-slogan{font-size:13px;margin:0;letter-spacing:1px}
.brand-logo{position:relative;display:block;flex-shrink:0;width:220px;aspect-ratio:1254/328;overflow:hidden;mix-blend-mode:multiply}.brand-logo img{position:absolute;display:block;width:127.6%;max-width:none;height:auto;left:-13.1%;top:-195%;pointer-events:none}@media(max-width:800px){.brand-logo{width:165px}header{flex-wrap:wrap;gap:14px}}