:root{--ink:#36312e;--muted:#766b68;--accent:#99546a;--line:#e6deda;--soft:#f6e9ed}*{box-sizing:border-box}body{margin:0;background:#faf7f1;color:var(--ink);font:15px/1.8 system-ui,'Microsoft YaHei',sans-serif}header,main,footer{max-width:1000px;margin:auto;padding:24px}header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);gap:16px}.brand{font:600 24px Georgia,serif}.brand small{display:block;font:12px system-ui;color:var(--muted);margin-top:6px}nav{display:flex;gap:16px;font-size:13px}a{color:var(--accent);text-decoration:none}h1{font:36px/1.5 Georgia,'Songti SC',serif;white-space:pre-line;margin:20px 0}h2{font-size:22px}p{color:var(--muted)}.eyebrow{font-size:12px;letter-spacing:2px;margin-top:32px}.intro{max-width:680px}.course-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:32px 0}.course-card,.start-card,.lesson{background:white;border:1px solid var(--line);border-radius:18px;padding:24px;margin-bottom:16px}.cover{height:100px;display:grid;place-items:center;font-size:42px;color:var(--accent);background:radial-gradient(circle at 80% 10%,#efd4df 0 55px,transparent 56px),var(--soft);border-radius:12px;margin-bottom:20px}.primary,button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;border-radius:12px;padding:10px 16px;border:1px solid var(--line);background:white;color:var(--ink);font:500 14px system-ui;cursor:pointer}.primary{background:var(--accent);color:white;border:0;min-height:48px}.actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.lesson summary{cursor:pointer;font-weight:600;min-height:44px}.lesson summary small{float:right;color:var(--accent)}.note,.coming p{font-size:13px}.coming{padding:20px 0;border-top:1px solid var(--line)}footer{display:flex;justify-content:space-between;gap:16px;font-size:12px;color:var(--muted)}.notice{background:var(--soft);padding:12px;border-radius:12px}button:disabled{opacity:.5}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px}@media(max-width:800px){header,main,footer{padding:16px}header{align-items:flex-start}.brand{font-size:21px}nav{gap:12px;flex-wrap:wrap;justify-content:flex-end;max-width:55%}h1{font-size:29px}.course-grid{grid-template-columns:1fr}.course-card,.start-card,.lesson{padding:20px}.start-card .primary,.course-card .primary{width:100%}footer{flex-direction:column}.actions{align-items:flex-start;flex-direction:column}}

.enroll-settings{display:grid;grid-template-columns:1fr 1fr;gap:8px;max-width:440px;margin:16px 0}.enroll-settings input,.enroll-settings select{min-width:0;max-width:100%;min-height:44px;border:1px solid var(--line);border-radius:10px;padding:8px;font:16px system-ui}.enroll-settings select{grid-column:1/-1}.enroll-settings label{align-self:center;font-size:13px}