:root{--green:#163d35;--green-light:#e8efea;--gold:#d9c18b;--ink:#22372f;--muted:#66756b;--paper:#f7f7f0;--line:#dee4d9;--white:#fff;scroll-behavior:smooth;scroll-padding-top:100px}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",system-ui,sans-serif;-webkit-font-smoothing:antialiased;line-height:1.85}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #b4872a;outline-offset:4px}[hidden]{display:none!important}.skip-link{position:fixed;left:15px;top:-100px;z-index:100;background:white;padding:12px}.skip-link:focus{top:10px}.site-header{background:#fffdf8;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.header-inner{max-width:1240px;padding:16px 32px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand{display:flex;gap:13px;align-items:center;font-weight:750;font-size:22px;line-height:1.3;letter-spacing:2px}.brand-mark{display:grid;place-items:center;background:var(--green);color:#f1e1b4;width:43px;height:47px;border-radius:7px;font:30px/1 "SimSun",serif}.brand small{display:block;font-size:10px;letter-spacing:1.8px;font-weight:500;color:var(--muted);margin-top:6px}.header-inner nav{display:flex;gap:30px;align-items:center;font-size:14px}.register-button{display:inline-flex;align-items:center;justify-content:center;gap:18px;background:var(--green);color:#fff;padding:10px 20px;border:1px solid var(--green);border-radius:6px;font-weight:600;white-space:nowrap}.register-button:hover{background:#28594c}.hero{background:var(--green);color:#f8f6e9;overflow:hidden}.hero-inner{max-width:1240px;position:relative;margin:auto;padding:53px 32px 55px}.eyebrow{color:var(--gold);font-size:13px;letter-spacing:3px}.hero h1{font-family:"STSong","SimSun",serif;font-weight:700;font-size:clamp(31px,4.5vw,48px);letter-spacing:4px;line-height:1.35;margin:15px 0 18px;position:relative;z-index:1}.hero p{color:#d3dfd4;font-size:16px;line-height:1.9;margin:0;position:relative;z-index:1}.hero-bottom{display:flex;gap:24px;align-items:center;margin-top:29px;position:relative;z-index:1}.start-button{background:#ecdbb2;color:#173c34;padding:10px 20px;border-radius:5px;display:flex;gap:28px;font-size:14px;font-weight:700}.start-button:hover{background:#fff0cc}.guide-meta{font-size:12px;color:#d4dfce;display:flex;align-items:center;gap:15px}.guide-meta i{height:12px;border-left:1px solid #839786}.hero-seal{position:absolute;right:97px;top:15px;font-family:"SimSun",serif;color:rgba(218,196,147,.12);font-size:154px;line-height:1.05;border:1px solid rgba(218,196,147,.15);padding:12px 25px;transform:rotate(9deg);user-select:none}.guide-layout{max-width:1240px;margin:0 auto;padding:40px 32px 70px;display:grid;grid-template-columns:240px minmax(0,1fr);gap:40px;align-items:start}.sidebar-inner{position:sticky;top:112px}.sidebar{align-self:stretch;min-width:0}.toc summary{list-style:none;font-size:15px;font-weight:750;padding:0 0 15px;border-bottom:1px solid var(--line);cursor:pointer}.toc summary::-webkit-details-marker{display:none}.toc summary span{float:right}.toc nav{padding:14px 0 8px}.toc nav a{display:flex;align-items:baseline;gap:11px;font-size:13px;line-height:1.7;margin:4px 0;padding:10px 10px;border-radius:5px;border-left:3px solid transparent}.toc a span{font-size:11px;color:#899588;flex-shrink:0}.toc a:hover{background:#e9ede2}.toc a[aria-current]{background:#e4ecdf;color:#183c2d;border-left-color:#335c42;font-weight:700}.guide-search{border-top:1px solid var(--line);margin-top:18px;padding-top:20px}.guide-search label{font-size:12px;font-weight:600;display:block;margin-bottom:9px}.guide-search>div{display:flex;gap:5px}.guide-search input{width:100%;min-width:0;background:#fff;border:1px solid #b9c6b5;border-radius:4px;padding:7px 9px;font-size:12px;color:var(--ink)}.guide-search button{background:var(--green);color:white;border:0;border-radius:4px;font-size:12px;padding:6px 10px;white-space:nowrap;cursor:pointer}.guide-search p{font-size:12px;line-height:1.7;margin:7px 0}.guide-search ul{list-style:none;margin:0;padding:0;max-height:190px;overflow:auto}.guide-search li a{font-size:12px;display:block;padding:6px 2px;border-bottom:1px solid var(--line);line-height:1.7}.guide-search li a:hover{text-decoration:underline}.reading-tip{color:var(--muted);font-size:11px;line-height:1.9;margin-top:23px}.guide-content{min-width:0}.article-intro{display:flex;gap:17px;align-items:baseline;border-left:3px solid #be9e61;background:#eeeee3;padding:15px 20px;border-radius:0 5px 5px 0;margin-bottom:36px}.article-intro>span{font-size:12px;font-weight:700;white-space:nowrap}.article-intro p{font-size:12px;line-height:1.9;margin:0;color:#52604f}.chapter{margin-bottom:55px;scroll-margin-top:100px}.chapter-heading{display:flex;align-items:center;gap:16px;border-bottom:1px solid #cdd7c7;padding-bottom:20px;margin-bottom:29px}.chapter-number{font-family:Georgia,serif;font-size:34px;color:#91a48b;line-height:1}.chapter h2{font-size:22px;line-height:1.5;letter-spacing:.3px;margin:0;font-weight:750}.chapter h3{font-size:18px;line-height:1.6;margin:34px 0 11px;font-weight:700;scroll-margin-top:110px}.chapter p{font-size:15px;line-height:1.95;margin:7px 0;overflow-wrap:anywhere}.chapter figure{margin:21px 0 29px;background:#fff;border:1px solid #dce2d7;border-radius:7px;overflow:hidden}.figure-link{position:relative;display:block;background:#dae0d4;cursor:zoom-in}.figure-link img{display:block;width:100%;height:auto}.zoom-label{position:absolute;right:10px;bottom:10px;color:#fff;background:rgba(14,31,24,.82);font-size:10px;padding:4px 10px;border-radius:4px}.chapter figcaption{font-size:12px;line-height:1.8;padding:12px 16px;color:#5c6b60}.end-note{padding:27px;border-top:1px solid #bfcbb8;border-bottom:1px solid #bfcbb8;display:flex;align-items:center;justify-content:space-between;gap:24px;background:#eef1e5}.end-note h2{font-size:21px;margin:0 0 3px}.end-note p{font-size:13px;color:var(--muted);margin:0}.end-note .register-button{font-size:13px}footer{max-width:1176px;margin:auto;padding:24px 0;border-top:1px solid var(--line);font-size:12px;color:var(--muted);display:flex;justify-content:space-between}footer p{margin:0}dialog{width:min(96vw,1800px);max-width:96vw;max-height:94vh;border:0;border-radius:8px;padding:0;background:#17241e;color:white}dialog::backdrop{background:rgba(5,15,10,.88)}.viewer-toolbar{display:flex;gap:18px;align-items:center;padding:12px 18px;font-size:12px;border-bottom:1px solid #44534a}.viewer-toolbar span{flex:1}.viewer-toolbar a{color:#f5da9e;white-space:nowrap}.viewer-toolbar button{color:white;border:1px solid #708276;background:transparent;border-radius:4px;padding:6px 12px;cursor:pointer;white-space:nowrap}.viewer-body{overflow:auto;max-height:calc(94vh - 100px);padding:8px;text-align:center}.viewer-body img{max-width:100%;height:auto;display:inline-block}.image-open{overflow:hidden}
@media(min-width:1600px){.guide-layout,.header-inner,.hero-inner{max-width:1320px}.guide-layout{grid-template-columns:250px minmax(0,1fr);gap:50px}}
@media(max-width:1000px){.header-inner,.hero-inner{padding-left:24px;padding-right:24px}.guide-layout{padding:30px 24px 50px;grid-template-columns:210px minmax(0,1fr);gap:26px}.chapter h2{font-size:20px}.article-intro{display:block}.article-intro p{margin-top:5px}.hero-seal{right:45px;opacity:.7}footer{margin:0 24px}}
@media(max-width:760px){:root{scroll-padding-top:88px}.header-inner{padding:12px 20px}.brand{font-size:19px;gap:9px}.brand-mark{width:36px;height:40px;font-size:25px}.brand small{font-size:8px;letter-spacing:1px}.header-guide{display:none}.header-inner nav{gap:0}.register-button{padding:8px 12px;font-size:12px;gap:9px}.hero-inner{padding:35px 20px 37px}.hero h1{font-size:31px;letter-spacing:1px;margin:12px 0 15px}.eyebrow{font-size:11px;letter-spacing:2px}.hero p{font-size:14px;max-width:290px}.desktop-break{display:none}.hero-bottom{gap:17px;margin-top:23px}.guide-meta{font-size:10px;gap:8px}.start-button{font-size:12px;padding:9px 15px;gap:22px}.hero-seal{right:-14px;top:32px;font-size:105px;opacity:.8}.guide-layout{display:block;padding:25px 20px 42px}.sidebar-inner{position:static}.toc{border:1px solid #ccd8c6;background:#eef2e7;border-radius:6px;padding:14px 15px}.toc summary{border:0;padding:0;font-size:14px}.toc nav{padding-top:10px}.toc nav a{padding:8px;margin:2px 0}.guide-search{margin:17px 0 26px;padding-top:0;border:0}.guide-search input{padding:9px;font-size:14px}.guide-search button{font-size:13px;padding:7px 15px}.reading-tip{display:none}.article-intro{margin-bottom:29px;padding:12px 15px}.chapter-heading{gap:12px;padding-bottom:17px;margin-bottom:23px}.chapter-number{font-size:30px}.chapter h2{font-size:19px;line-height:1.6}.chapter h3{font-size:17px;margin-top:28px}.chapter p{font-size:15px;line-height:1.9}.chapter figure{margin:18px 0 25px;border-radius:5px}.chapter figcaption{font-size:11px;padding:10px 12px}.zoom-label{font-size:9px;bottom:6px;right:6px;padding:3px 8px}.chapter{margin-bottom:40px}.end-note{padding:22px 18px;display:block}.end-note h2{font-size:20px}.end-note .register-button{margin-top:17px}footer{margin:0 20px;font-size:11px;padding:22px 0;gap:10px}.viewer-toolbar{flex-wrap:wrap;gap:10px;padding:12px}.viewer-toolbar span{flex-basis:100%;font-size:11px}.viewer-body{max-height:calc(94vh - 150px)}}
dialog:not([open]){display:none}.viewer-body{position:relative;min-height:130px}#viewer-status{position:absolute;top:12px;left:12px;right:12px;margin:0;background:rgba(12,29,20,.9);padding:12px;font-size:13px;border-radius:4px;z-index:1}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}}