:root{--paper:#f7f6f2;--white:#fff;--ink:#222925;--muted:#777d76;--green:#285c48;--sage:#eaf0e8;--line:#dedfd8;--serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;--sans:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.65 var(--sans)}a{color:inherit;text-decoration:none}button,input,select{font:inherit;color:inherit}button,a,select,input{-webkit-tap-highlight-color:transparent}button,select{cursor:pointer}button{border:1px solid var(--line);background:var(--white);border-radius:5px;padding:10px 16px;transition:background .15s,border-color .15s}button:hover:not(:disabled){background:var(--sage);border-color:#a5b7a9}button:disabled{cursor:not-allowed;opacity:.4}a:hover{color:var(--green)}:focus-visible{outline:3px solid #bd9d5c;outline-offset:3px}select,input{min-height:43px;border:1px solid var(--line);border-radius:5px;background:var(--white);padding:8px 11px;min-width:0}input[type=search]::-webkit-search-cancel-button{cursor:pointer}input::placeholder{color:#93988e}h1,h2,h3,p{margin-top:0}.site-header{height:78px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:48px;padding:0 max(32px,calc((100vw - 1220px)/2));background:rgba(247,246,242,.97);position:sticky;top:0;z-index:30}.brand{display:flex;align-items:center;gap:18px;flex-shrink:0;font:700 25px/1 var(--serif);letter-spacing:1px}.brand-symbol{font:italic 51px/.8 Georgia,serif;color:var(--green)}.site-header nav{height:100%;display:flex;gap:30px;align-items:center}.site-header nav a{height:100%;display:flex;align-items:center;gap:10px;position:relative}.site-header nav a.active{color:var(--green);font-weight:600}.site-header nav a.active:after{content:"";height:3px;position:absolute;bottom:0;left:0;right:0;background:var(--green)}.header-note{margin-left:auto;font-size:12px;letter-spacing:2px;color:var(--muted)}.skip-link{position:fixed;top:-100px;left:12px;z-index:100;background:white;padding:12px}.skip-link:focus{top:8px}.shell{max-width:1220px;margin:auto;padding:50px 0 32px}.hero h1{font:600 clamp(34px,4.3vw,58px)/1.35 var(--serif);letter-spacing:-1.5px;margin:0 0 12px}.hero>p{color:var(--muted);font-size:16px;letter-spacing:1px;margin:0 0 30px}.feature-strip{display:flex;align-items:center;justify-content:space-between;gap:36px;padding:22px 32px;background:var(--green);color:#fff;border-radius:6px;margin-bottom:32px;overflow:hidden}.feature-years{font:36px/1.3 Georgia,serif;white-space:nowrap;letter-spacing:2px}.feature-caption{font-size:13px;letter-spacing:2px;color:#d5e2d5;margin-top:4px}.curve{width:290px;height:92px;flex:1;max-width:360px;opacity:.75}.feature-strip a{background:#fff;color:var(--green);padding:13px 22px;border-radius:4px;white-space:nowrap;font-weight:600;transition:transform .15s}.feature-strip a:hover{transform:translateX(3px)}.library-panel{background:var(--white);border:1px solid #ecece6;border-radius:7px;padding:28px 30px}.section-top{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:20px}.section-top h2{font:600 30px/1.5 var(--serif);margin:0}.searchbox{position:relative;display:flex;align-items:center;min-width:300px}.searchbox svg{position:absolute;left:14px;width:18px;height:18px;color:var(--muted);pointer-events:none}.searchbox input{width:100%;padding-left:42px;min-height:45px;background:#fcfcfa}.filters{display:flex;align-items:center;flex-wrap:wrap;gap:12px;padding-bottom:20px}.segments{display:flex;flex-shrink:0;border:1px solid var(--line);border-radius:5px;overflow:hidden}.segments button{border:0;border-right:1px solid var(--line);border-radius:0;padding:9px 18px;background:transparent}.segments button:last-child{border-right:0}.segments button[aria-pressed=true]{background:var(--green);color:#fff}.field-inline{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px}.field-inline select{font-size:14px;color:var(--ink);padding:6px 24px 6px 10px;min-height:40px}.year-dash{color:var(--muted)}.sort-field{margin-left:auto}#reset{font-size:13px;min-height:40px;padding:7px 12px}.result-status{font-size:12px;color:var(--muted);margin:0 0 14px;display:flex;align-items:center;justify-content:space-between;gap:12px}.table-wrap{border:1px solid var(--line);border-radius:5px;overflow:hidden}.paper-table{width:100%;border-collapse:collapse;table-layout:fixed}.paper-table th{font-size:13px;text-align:left;background:#f2f3ef;padding:12px 22px;font-weight:500;color:#5d665e}.paper-table th:first-child{width:125px}.paper-table td{padding:17px 22px;border-top:1px solid var(--line);vertical-align:top}.paper-table tr:hover td{background:#fcfcf9}.year-number{font:26px/1.35 Georgia,serif}.year-number small{font:11px var(--sans);color:var(--muted);display:block;margin-top:5px}.paper-link{font-size:15px;color:var(--green);font-weight:600;display:inline-flex;align-items:center;gap:12px}.paper-link:hover span{transform:translateX(3px)}.paper-link span{transition:transform .15s}.paper-meta{font-size:11px;color:var(--muted);margin-top:5px}.mobile-label{display:none}.match-links{display:flex;flex-direction:column;gap:7px;margin-top:10px;font-size:12px}.match-links a{color:var(--green);text-decoration:underline;text-decoration-color:#bfd2c4;text-underline-offset:3px}.empty-cell{color:#aaa;font-size:13px}.pagination{display:flex;justify-content:center;align-items:center;gap:6px;margin-top:24px;flex-wrap:wrap}.pagination button{padding:7px 12px;min-width:37px}.pagination button[aria-current=page]{background:var(--green);color:#fff;border-color:var(--green)}.site-footer{display:flex;justify-content:space-between;gap:25px;font-size:11px;color:#92978e;margin-top:26px}.empty-state{text-align:center;padding:58px 20px}.empty-state .empty-mark{font:48px var(--serif);color:#9dae9d;margin-bottom:8px}.empty-state h3{font-size:18px;margin-bottom:6px}.empty-state p{color:var(--muted);font-size:13px}.loading{padding:100px 30px;text-align:center;color:var(--muted)}
/* Reader */
body.reading{background:#fff}.reading .site-header{padding-left:35px;padding-right:35px;background:var(--paper)}.reader{max-width:1510px;margin:auto;display:grid;grid-template-columns:286px minmax(0,1fr);min-height:calc(100vh - 78px)}.sidebar{border-right:1px solid var(--line);background:var(--paper);position:sticky;top:78px;height:calc(100vh - 78px);display:flex;flex-direction:column;padding:25px 22px 14px}.sidebar h2{font:600 25px/1.5 var(--serif);margin-bottom:18px}.reader-selectors{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:16px}.reader-selectors label{font-size:12px;color:var(--muted)}.reader-selectors select{display:block;width:100%;margin-top:5px;padding:8px}.sidebar .searchbox{min-width:0;width:100%;margin-bottom:10px}.sidebar .searchbox input{font-size:12px;min-height:40px}.sidebar-hint{color:var(--muted);font-size:11px;margin-bottom:10px}.q-list{overflow-y:auto;flex:1;scrollbar-width:thin;scrollbar-color:#c7cec4 transparent;margin:0 -7px;padding:0 7px}.q-link{display:flex;gap:11px;padding:10px 9px;border-left:3px solid transparent;margin:2px 0;border-radius:2px 5px 5px 2px;line-height:1.55;font-size:12px}.q-link .q-num{font:17px/1.5 Georgia,serif;color:#8a9388;min-width:23px}.q-link .q-name{min-width:0;overflow-wrap:anywhere}.q-link:hover{background:#f0f1eb}.q-link[aria-current=page]{background:var(--sage);border-left-color:var(--green);color:var(--green);font-weight:600}.q-link[aria-current=page] .q-num{color:var(--green)}.deferred-tag{font:10px var(--sans);color:#9b7852;padding-left:5px;white-space:nowrap}.sidebar-bottom{border-top:1px solid var(--line);margin-top:12px;padding-top:12px;display:flex;flex-wrap:wrap;gap:8px;font-size:11px}.sidebar-bottom a{color:var(--green);border:1px solid var(--line);padding:5px 8px;border-radius:3px}.reader-main{padding:24px 48px 115px;min-width:0;max-width:1100px;width:100%;margin:auto}.breadcrumb{display:flex;align-items:center;gap:13px;font-size:12px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:19px}.breadcrumb a{color:var(--green)}.question-toolbar{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:12px;margin-bottom:13px;gap:10px}.question-toolbar button{border:0;background:transparent;padding:4px;color:var(--green);font-size:12px}.reader-title{font:600 33px/1.5 var(--serif);margin:0 0 10px;overflow-wrap:anywhere}.original-number{color:var(--muted);font-size:12px;margin-bottom:23px}.summary{background:var(--sage);border-radius:6px;padding:20px 24px;margin:24px 0 30px;color:#244736;border-left:3px solid #8ba78c;overflow-x:auto}.summary-label{font-family:var(--serif);font-weight:700;font-size:19px;display:flex;justify-content:space-between;gap:15px;align-items:center;margin-bottom:9px}.summary-label small{font:10px var(--sans);font-weight:400;color:#788b79}.summary-content{font-size:15px;line-height:1.9}.scope-summary{background:#f7f0e6;border-color:#bb9a69;color:#73572f}.source-note{padding:12px 15px;background:#faf6ee;border:1px solid #e9dcc5;font-size:12px;color:#806339;line-height:1.8;margin:12px 0 24px}.article{font-size:16px;line-height:1.95;overflow-wrap:break-word}.article p{margin:16px 0}.article h1{font:600 30px/1.6 var(--serif)}.article h2{font:600 25px/1.6 var(--serif);margin:32px 0 16px}.article h3{font:600 23px/1.65 var(--serif);color:var(--green);border-top:1px solid var(--line);padding-top:24px;margin:32px 0 18px}.article h4{font-size:17px;margin:25px 0 12px}.article strong{color:#293f31}.article ul,.article ol{padding-left:1.6em}.article li{margin:8px 0}.article img{max-width:100%;height:auto;display:block;margin:24px auto;border-radius:4px}.article table{border-collapse:collapse;display:block;overflow:auto;width:100%;font-size:13px;margin:20px 0}.article th,.article td{border:1px solid var(--line);padding:10px 12px;min-width:70px}.article th{background:var(--sage)}.article a{color:var(--green);text-decoration:underline}.article blockquote{border-left:3px solid #a7b8a8;padding-left:20px;margin:20px 0;color:#546253}.article .katex{font-size:1.08em}.article .katex-display{overflow-x:auto;overflow-y:hidden;padding:12px 4px;margin:20px 0}.article .katex-display>.katex{text-align:center;white-space:nowrap}.article .options{display:grid;gap:12px;grid-template-columns:repeat(2,minmax(0,1fr));margin:16px 0}.article .option{min-width:0;overflow-x:auto;padding:5px 0}.article .options p{margin:4px 0}.reader-footer{position:fixed;bottom:0;right:0;left:286px;display:flex;align-items:center;justify-content:space-between;gap:20px;z-index:20;background:rgba(255,255,255,.97);border-top:1px solid var(--line);padding:13px 48px;box-shadow:0 -6px 22px #22292504}.reader-footer button{min-width:130px}.reader-footer .next{background:var(--green);color:#fff;border-color:var(--green)}.reader-footer .next:hover:not(:disabled){background:#214d3b}.jump-field{display:flex;gap:10px;align-items:center;font-size:12px;color:var(--muted)}.jump-field select{max-width:180px;min-height:40px;font-size:13px}.mobile-directory{display:none}.mobile-close{display:none}.reader-note{font-size:11px;color:var(--muted);border-top:1px solid var(--line);padding-top:18px;margin-top:40px}.paper-intro{margin-bottom:25px}.paper-intro summary{cursor:pointer;color:var(--green);font-size:13px;padding:10px 0}.paper-intro .article{font-size:13px;line-height:1.8;color:var(--muted)}#toast{position:fixed;bottom:90px;left:50%;transform:translate(-50%,15px);background:#233d2f;color:#fff;border-radius:6px;padding:12px 22px;z-index:100;box-shadow:0 4px 25px #0002;opacity:0;pointer-events:none;font-size:13px;max-width:90vw;transition:.2s}#toast.show{opacity:1;transform:translate(-50%,0)}.copy-fallback{position:fixed;z-index:100;top:35%;left:50%;transform:translateX(-50%);width:min(90vw,540px);background:#fff;border:1px solid var(--line);border-radius:8px;padding:25px;box-shadow:0 10px 80px #0004}.copy-fallback input{width:100%;margin-bottom:16px;font-size:13px}.copy-fallback button{float:right}.drawer-backdrop{display:none}.error-page{max-width:600px;margin:80px auto;text-align:center;padding:25px}.error-page h1{font:28px var(--serif)}.error-page a,.error-page button{display:inline-block;margin:10px}.muted{color:var(--muted)}
@media(min-width:1510px){.reader-footer{left:calc((100vw - 1510px)/2 + 286px);right:calc((100vw - 1510px)/2)}}
@media(max-width:1300px){.shell{padding:38px 32px}.site-header{padding:0 32px}.segments button{padding:9px 14px}.library-panel{padding:25px}.sort-field{margin-left:0}.filters{gap:10px}.reader-main{padding-left:35px;padding-right:35px}.reader-footer{padding-left:35px;padding-right:35px}.reader-title{font-size:29px}}
@media(max-width:960px){.header-note{display:none}.shell{padding:32px 22px}.hero h1{font-size:43px}.curve{max-width:200px}.feature-strip{padding:23px;gap:18px}.feature-years{font-size:29px}.feature-caption{font-size:11px}.feature-strip a{font-size:13px;padding:11px 14px}.paper-table th:first-child{width:95px}.paper-table th,.paper-table td{padding:15px}.reader{grid-template-columns:245px minmax(0,1fr)}.sidebar{padding:20px 15px}.reader-main{padding:22px 26px 105px}.reader-footer{left:245px;padding:12px 22px;gap:10px}.reader-footer button{min-width:90px;font-size:13px}.jump-field{gap:6px}.jump-field select{max-width:100px}.reader-title{font-size:27px}.article{font-size:15px}.summary{padding:17px 19px}}
@media(max-width:700px){.site-header,.reading .site-header{height:65px;padding:0 18px;gap:20px}.brand{font-size:20px;gap:10px}.brand-symbol{font-size:40px}.site-header nav{margin-left:auto;gap:18px;font-size:12px}.site-header nav a span{display:none}.shell{padding:27px 16px 22px}.hero h1{font-size:33px;letter-spacing:-1px}.hero>p{font-size:12px;letter-spacing:0;line-height:1.9;margin-bottom:20px}.feature-strip{padding:21px;gap:12px;flex-wrap:wrap;margin-bottom:20px}.feature-years{font-size:27px}.feature-caption{letter-spacing:0}.curve{display:none}.feature-strip a{font-size:12px;padding:10px 13px}.library-panel{padding:20px 14px;border-radius:6px}.section-top{display:block;margin-bottom:16px}.section-top h2{font-size:27px;margin-bottom:15px}.searchbox{min-width:0;width:100%}.filters{gap:10px;padding-bottom:16px}.segments{width:100%}.segments button{flex:1;font-size:13px;padding:10px}.field-inline{font-size:11px;gap:5px}.field-inline select{font-size:12px;min-height:38px;padding:6px 19px 6px 7px}.year-dash{font-size:12px}.sort-field{margin-left:0}#reset{margin-left:auto;font-size:11px;min-height:38px;padding:7px 10px}.result-status{font-size:10px;align-items:flex-start}.paper-table,.paper-table tbody,.paper-table tr{display:block}.paper-table thead{display:none}.paper-table tr{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));padding:13px 8px;border-top:1px solid var(--line)}.paper-table tr:first-child{border-top:0}.paper-table td{display:block;padding:7px;border:0}.paper-table .year-cell{grid-column:1/-1;padding:0 7px 6px}.year-number{font-size:24px}.year-number small{display:none}.mobile-label{display:block;font-size:12px;color:var(--ink);font-weight:500;margin-bottom:5px}.paper-link{font-size:12px;gap:5px}.paper-meta{font-size:10px;line-height:1.7}.paper-meta .defer-meta{display:block}.pagination{gap:5px;margin-top:19px}.pagination button{padding:7px 10px;font-size:12px;min-width:32px}.site-footer{font-size:10px;display:block;line-height:1.8}.site-footer span{display:block}.empty-cell{font-size:11px}.match-links{font-size:11px;overflow-wrap:anywhere}.reader{display:block;min-height:calc(100vh - 65px)}.sidebar{display:none;position:fixed;top:65px;left:0;bottom:0;width:300px;max-width:88vw;z-index:50;height:calc(100dvh - 65px);padding:22px 20px 24px;border-right:1px solid var(--line)}.drawer-open .sidebar{display:flex}.drawer-open .drawer-backdrop{display:block;position:fixed;inset:65px 0 0;background:#0a211655;z-index:45;border:0;border-radius:0}.mobile-close{display:block;position:absolute;right:16px;top:17px;background:transparent;border:0;font-size:22px;padding:0 6px}.reader-main{padding:17px 20px 108px}.breadcrumb{padding-bottom:12px;margin-bottom:14px;font-size:11px;gap:10px}.mobile-directory{display:inline-flex;align-items:center;gap:5px;font-size:12px;padding:5px 9px;color:var(--green)}.question-toolbar{flex-wrap:wrap;gap:9px;font-size:11px}.question-toolbar button{font-size:11px}.question-toolbar .copy-button{margin-left:auto}.reader-title{font-size:27px;line-height:1.55;margin-top:17px}.original-number{font-size:11px;margin-bottom:17px}.summary{margin:18px 0 25px;padding:17px 16px}.summary-label{font-size:18px;align-items:flex-start}.summary-label small{font-size:9px;padding-top:5px}.summary-content{font-size:14px}.article{font-size:15px;line-height:1.95}.article h3{font-size:22px;padding-top:20px;margin:27px 0 17px}.article .options{grid-template-columns:1fr}.reader-footer{left:0;right:0;padding:11px 16px calc(11px + env(safe-area-inset-bottom));gap:8px}.reader-footer button{min-width:83px;font-size:12px;padding:10px}.jump-field{gap:5px;font-size:11px}.jump-field select{max-width:99px;min-height:39px;padding:6px;font-size:12px}.jump-field>span{display:none}.paper-intro{margin-bottom:15px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media print{.site-header,.sidebar,.reader-footer,.question-toolbar,.breadcrumb,#toast,.mobile-directory,.paper-intro{display:none!important}.reader{display:block}.reader-main{max-width:none;margin:0;padding:0}.summary{break-inside:avoid}.article img,.katex-display{break-inside:avoid}body{background:#fff}}