:root{--ink:#223b34;--muted:#657c70;--green:#217358;--line:#dce6dc;--soft:#eef4ed;--paper:#fff;--bg:#f6f7f2;--header:#16382e}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.85 "Microsoft YaHei","PingFang SC",system-ui,sans-serif}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--green);outline-offset:3px}button{cursor:pointer}.viewer-header{position:sticky;top:0;z-index:5;background:var(--header);color:#f7f7e9;box-shadow:0 3px 20px #12312215}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;width:min(1320px,calc(100% - 48px));min-height:72px;margin:auto}.viewer-brand{font-size:17px;font-weight:700;letter-spacing:.02em}.viewer-brand small{display:block;font-size:10px;letter-spacing:1.5px;color:#b6cbb6;font-weight:400}.viewer-actions{display:flex;gap:10px}.viewer-actions button{border:1px solid #abcab93d;border-radius:8px;background:none;color:inherit;padding:8px 14px;font-size:12px;min-height:38px}.read-progress{height:3px;background:#21493b}.read-progress div{height:3px;width:0;background:#c8d897}.layout{display:grid;grid-template-columns:255px minmax(0,1fr);gap:30px;width:min(1320px,calc(100% - 48px));margin:32px auto 70px}.toc{position:sticky;top:105px;max-height:calc(100dvh - 135px);overflow:auto;align-self:start;padding:8px 14px 18px 0;font-size:12px}.toc summary{font-size:14px;font-weight:700;padding:0 0 12px;cursor:pointer}.toc-search{width:100%;min-width:0;border:1px solid var(--line);background:white;border-radius:7px;padding:9px 11px;margin:0 0 13px;color:var(--ink);font-size:12px}.toc nav{display:flex;flex-direction:column;gap:3px}.toc a{display:block;border-radius:6px;color:var(--muted);text-decoration:none;padding:6px 9px;border-left:2px solid transparent;line-height:1.6}.toc a.active,.toc a:hover{background:#e7eee1;color:#185c43;border-left-color:#6d997a}.toc-note{font-size:10px;color:var(--muted);padding:15px 9px 0;line-height:1.7}.handbook{min-width:0;background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:48px 54px;box-shadow:0 10px 35px #17302304}.book-meta{display:flex;gap:10px;flex-wrap:wrap;font-size:10px;color:var(--green);letter-spacing:1.3px;text-transform:uppercase}.book-meta span{padding:4px 9px;background:var(--soft);border-radius:4px}h1{font-family:"Noto Serif SC","Songti SC",SimSun,serif;font-size:36px;line-height:1.4;margin:23px 0 12px;color:#152d25}h2{font-size:25px;line-height:1.5;margin:48px 0 20px;padding-top:22px;border-top:1px solid var(--line);color:#193d2e}h3{font-size:18px;line-height:1.6;margin:28px 0 13px;color:#244d3c}p{margin:14px 0;overflow-wrap:anywhere}a{color:#1b7453;text-underline-offset:3px}strong{font-weight:700}ul,ol{padding-left:24px}li{margin:8px 0}li p{margin:8px 0}p>code,li>code,td code{font-size:.91em;padding:2px 5px;background:#eef2eb;border-radius:3px;color:#355c45;overflow-wrap:anywhere}.table-wrap{overflow-x:auto;margin:20px 0 25px;border:1px solid var(--line);border-radius:9px}table{border-collapse:collapse;width:100%;font-size:12px;min-width:470px;text-align:left}th{background:#eaf0e5;color:#2a503b;font-weight:700}th,td{padding:12px 14px;line-height:1.7;vertical-align:middle;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}tr:last-child td{border-bottom:0}th:last-child,td:last-child{border-right:0}tr:nth-child(even) td{background:#fafcf9}.code-block{overflow:hidden;border:1px solid #dce3d5;border-radius:10px;margin:20px 0 25px;background:#f7f9f3}.code-toolbar{display:flex;justify-content:space-between;align-items:center;padding:8px 13px;background:#ebf0e4;color:#5a735b;font-size:10px;letter-spacing:.06em;border-bottom:1px solid #dce3d5}.code-toolbar button{font-size:10px;border:1px solid #c9d7c1;border-radius:5px;background:#f8fbf5;color:#3c6341;padding:3px 10px;min-height:28px}pre{overflow:auto;max-width:100%;margin:0;padding:17px 19px;line-height:1.7;font-size:11px;tab-size:4;color:#254c34}pre code{font-family:Consolas,"Microsoft YaHei",monospace;font-size:inherit}.check-item{list-style:none;margin-left:-24px}.check-item label{display:flex;gap:10px;align-items:flex-start;padding:5px 0;cursor:pointer}.check-item input{flex:none;width:16px;height:16px;margin-top:5px;accent-color:#287358}.check-item:has(input:checked) span{color:#738573}.book-footer{padding-top:25px;border-top:1px solid var(--line);margin-top:35px;color:var(--muted);font-size:11px}.toast{position:fixed;z-index:20;bottom:25px;left:50%;transform:translate(-50%,12px);opacity:0;pointer-events:none;padding:11px 18px;border-radius:9px;background:#173d2e;color:white;font-size:12px;max-width:calc(100% - 32px);box-shadow:0 4px 25px #193d2a22}.toast.show{opacity:1;transform:translate(-50%,0)}[hidden]{display:none!important}
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@media(min-width:1081px){.toc>summary{list-style:none}.toc>summary::-webkit-details-marker{display:none}}
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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@page{size:A4;margin:17mm 16mm}
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@media(max-width:700px){.download-panel{align-items:stretch;flex-direction:column;padding:15px}.download-actions a{flex:1;min-height:42px}}
@media print{.download-panel,.book-footer .return-link{display:none}}