:root{--ink:#263b32;--text:#35483e;--muted:#607166;--green:#087b50;--green-hover:#06643f;--tint:#edf6f0;--line:#e4ebe6;--soft:#f8faf9;--radius:12px;--shadow:0 4px 18px #244b3510}*{box-sizing:border-box}body{color:var(--text);overflow-wrap:anywhere;background:#fff;margin:0;font:15px/1.75 -apple-system,BlinkMacSystemFont,PingFang SC,Hiragino Sans GB,sans-serif}a{color:var(--green);text-decoration:none}a:hover{text-underline-offset:4px;text-decoration:underline}button,input{font:inherit}button{cursor:pointer;border:1px solid var(--line);color:var(--text);background:#fff;border-radius:8px;padding:7px 15px}button:hover{background:var(--soft);border-color:#afc6b8}:focus-visible{outline-offset:4px;outline:3px solid #25885e}button:disabled,[aria-disabled=true]{opacity:.5;cursor:not-allowed;pointer-events:none}header{border-bottom:1px solid var(--line);align-items:center;gap:30px;min-height:72px;padding:14px 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solid var(--line);background:var(--soft);border-radius:8px;margin-bottom:24px;display:flex}#search-form:focus-within{outline:2px solid var(--green);outline-offset:2px}#search{width:100%;min-width:0;color:var(--ink);background:0 0;border:0;border-radius:8px;padding:10px;font-size:12px}#search:focus-visible{outline:0}#search-form button{background:0 0;border:0;flex-shrink:0;padding:4px 10px;font-size:12px}.folder{color:var(--muted);margin:20px 0 8px;font-size:12px}.tree-item{color:var(--text);border-radius:7px;gap:9px;padding:9px 12px;font-size:13px;line-height:1.6;display:flex}.tree-item:hover{background:var(--soft);text-decoration:none}.tree-item.selected{background:var(--tint);color:var(--green);font-weight:600}.tree-marker{color:#6c8978;flex-shrink:0}.reading{width:100%;min-width:0;max-width:940px;margin-inline:auto;padding:32px clamp(24px,4.2vw,64px) 48px}#breadcrumb{margin:8px 0 24px;font-size:12px;line-height:1.8}#breadcrumb a{color:var(--muted)}#breadcrumb 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