.chapter-intro{margin-bottom:28px}.chapter-intro h1{font-size:37px}.chapter-subjects{display:grid;grid-template-columns:repeat(3,1fr);gap:13px;margin:0 0 22px}.chapter-subject{display:grid;gap:9px;text-align:left;padding:20px 22px;background:#fff;border:1px solid var(--line);border-radius:8px;color:var(--ink);font:inherit;cursor:pointer}.chapter-subject.active{border-color:#98b780;background:#f0f5e9}.chapter-subject strong{font-size:17px;font-weight:500}.chapter-subject span{font-size:11px;color:#718264}.chapter-subject small{font-size:10px;color:#8b9980}.chapter-picker{display:flex;gap:28px;align-items:center;justify-content:space-between}.chapter-picker h2{margin-top:10px;font-size:16px}.chapter-picker label{display:grid;gap:8px;font-size:10px;color:var(--muted);width:55%}.chapter-picker select{width:100%;max-width:none;min-width:0;border:1px solid var(--line);border-radius:6px;background:#fafcf7;color:var(--ink);font:inherit;font-size:12px;line-height:1.7;padding:12px;cursor:pointer}.chapter-detail{margin-top:32px}.chapter-heading{display:flex;gap:22px;align-items:center;justify-content:space-between}.chapter-heading h2{font-size:24px;font-weight:500;margin:11px 0 7px}.chapter-heading p{color:var(--muted);font-size:12px;margin:0;line-height:1.6}.chapter-heading .btn{white-space:nowrap;text-decoration:none}.chapter-stats{font-size:11px;color:#849376;margin:16px 0}.chapter-files{display:grid;grid-template-columns:1fr 1fr;gap:16px}.chapter-file-top{display:flex;align-items:center;gap:15px}.chapter-file-icon{display:grid;place-items:center;width:40px;height:50px;border:1px solid #d9e4ce;border-radius:4px;background:#f7f9f2;color:#80956d;font:12px ui-monospace,monospace}.chapter-file-icon.ms{background:#ecf2e4;color:#587c3f}.chapter-file h3{font-size:15px;font-weight:500;margin:0 0 8px}.chapter-file p{font-size:11px;color:var(--muted);line-height:1.8}.chapter-file-top p{margin:0}.chapter-file>p{margin:20px 0}.chapter-actions{display:flex;justify-content:space-between;gap:15px;align-items:center}.chapter-actions a{text-decoration:none}.chapter-actions .text-btn{font-size:11px}.chapter-note{font-size:11px;color:#8a957f;line-height:1.9;margin-top:19px}.chapter-focus{color:#568168}.chapter-extra{color:#b88154}a:focus-visible,button:focus-visible,select:focus-visible{outline:2px solid #8ba373;outline-offset:3px}
@media(max-width:1000px){.chapter-intro h1{font-size:32px}.chapter-subject{padding:18px 15px}.chapter-heading h2{font-size:21px}.chapter-picker{gap:18px}.chapter-picker label{width:52%}}
@media(max-width:760px){.chapter-intro h1{font-size:29px;line-height:1.5}.chapter-intro .green{display:block}.chapter-intro p{max-width:none;font-size:10px}.chapter-subjects{gap:8px;margin-bottom:16px}.chapter-subject{padding:15px 10px;gap:8px}.chapter-subject strong{font-size:15px}.chapter-subject span{font-size:9px}.chapter-subject small{font-size:9px;line-height:1.7}.chapter-picker{display:block;padding:20px 17px}.chapter-picker h2{font-size:15px}.chapter-picker label{width:100%;margin-top:18px}.chapter-picker select{padding:12px 8px;font-size:12px}.chapter-detail{margin-top:25px}.chapter-heading{display:block}.chapter-heading h2{font-size:22px}.chapter-heading p{font-size:11px}.chapter-heading .btn{margin-top:18px;width:100%;justify-content:center}.chapter-stats{font-size:10px;line-height:1.8}.chapter-files{grid-template-columns:1fr;gap:12px}.chapter-file{padding:19px 17px}.chapter-file>p{margin:15px 0}.chapter-note{font-size:10px}.top-actions .text-btn{display:none}}