:root{--ink:#151715;--muted:#626862;--line:#cfd4cd;--paper:#f4f6f1;--white:#fff;--black:#101210;--blue:#2850d8;--red:#e34b3f;--green:#16866a;--yellow:#f0c949;--violet:#7657c7;--orange:#e98b3d;--header-height:68px;--page-gutter:36px;--page-width:1380px;color-scheme:light;font-synthesis:none;font-family:PingFang SC,Microsoft YaHei,Noto Sans CJK SC,Arial,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--paper)}body{min-width:320px;color:var(--ink);background:var(--paper);letter-spacing:0;-webkit-font-smoothing:antialiased;margin:0;font-size:16px;line-height:1.65}body,button,input{font-family:inherit}img{max-width:100%;display:block}a{color:inherit;text-decoration:none}button,input,summary{letter-spacing:0}:focus-visible{outline:3px solid var(--yellow);outline-offset:3px}::selection{color:var(--white);background:var(--blue)}.page-shell{width:min(100% - (var(--page-gutter) * 2), var(--page-width));margin-inline:auto}.page-shell-narrow{width:min(100% - (var(--page-gutter) * 2), 820px);margin-inline:auto}.sr-only,.section-intro .sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.site-header{z-index:40;height:var(--header-height);border-bottom:1px solid var(--line);background:color-mix(in srgb, var(--paper) 94%, transparent);backdrop-filter:blur(14px);position:sticky;top:0}.header-inner{width:min(100% - (var(--page-gutter) * 2), var(--page-width));grid-template-columns:1fr auto 1fr;align-items:center;height:100%;margin-inline:auto;display:grid}.brand{align-items:center;gap:10px;width:max-content;font-weight:700;display:inline-flex}.brand-mark{width:32px;height:32px;color:var(--white);background:var(--black);place-items:center;font-family:Songti SC,STSong,serif;font-size:18px;line-height:1;display:grid}.brand-name{font-family:Songti SC,STSong,serif;font-size:21px}.desktop-nav{align-items:stretch;height:100%;display:flex}.desktop-nav a{border-bottom:3px solid #0000;place-items:center;min-width:78px;padding:0 14px;font-size:14px;transition:border-color .16s,color .16s;display:grid}.desktop-nav a:hover,.desktop-nav a[aria-current=page]{color:var(--blue);border-bottom-color:var(--blue)}.header-tools{justify-content:flex-end;align-items:center;gap:8px;display:flex}.icon-button{width:40px;height:40px;color:var(--ink);cursor:pointer;background:0 0;border:1px solid #0000;place-items:center;padding:0;display:grid}.icon-button:hover{border-color:var(--ink)}.mobile-menu{display:none}.mobile-menu summary{list-style:none}.mobile-menu summary::-webkit-details-marker{display:none}.menu-close-icon,.mobile-menu[open] .menu-open-icon{display:none}.mobile-menu[open] .menu-close-icon{display:block}.home-hero{min-height:clamp(480px,68svh,700px);color:var(--white);background:#454b46;align-items:flex-end;display:flex;position:relative;overflow:hidden}.home-hero>img{object-fit:cover;object-position:50% 42%;width:100%;height:100%;position:absolute;inset:0}.hero-shade{background:#070c0957;position:absolute;inset:0}.hero-content{z-index:1;padding-top:88px;padding-bottom:42px;position:relative}.hero-kicker,.section-index,.article-eyebrow{text-transform:uppercase;margin:0 0 18px;font-size:12px;font-weight:700;line-height:1.3}.hero-kicker{color:var(--ink);background:var(--yellow);padding:7px 9px;display:inline-block}.home-hero h1{letter-spacing:0;max-width:900px;margin:0;font-family:Songti SC,STSong,serif;font-size:112px;font-weight:700;line-height:.96}.hero-bottom{border-top:1px solid #ffffff8c;justify-content:space-between;align-items:flex-end;gap:24px;margin-top:34px;padding-top:22px;display:flex}.hero-bottom>p{margin:0;font-family:Songti SC,STSong,serif;font-size:25px}.hero-jump,.text-link{align-items:center;gap:8px;font-size:14px;font-weight:700;display:inline-flex}.hero-jump{border:1px solid #ffffffb8;min-height:42px;padding:0 14px}.hero-jump:hover{color:var(--ink);background:var(--white)}.photo-credit{z-index:2;opacity:.78;font-size:10px;position:absolute;top:18px;right:18px}.framework-section,.topics-section,.latest-section{padding:108px 0}.framework-section{border-bottom:1px solid var(--line)}.framework-grid{grid-template-columns:minmax(280px,.8fr) minmax(520px,1.2fr);align-items:center;gap:84px;display:grid}.section-intro h2,.section-heading-row h2,.principles-grid h2,.method-layout h2,.evidence-grid h2{letter-spacing:0;margin:0;font-family:Songti SC,STSong,serif;font-size:42px;font-weight:600;line-height:1.22}.section-intro>p:not(.section-index){max-width:570px;color:var(--muted);margin:26px 0;font-size:17px}.section-index{color:var(--blue)}.text-link{border-bottom:1px solid;width:max-content;padding-bottom:3px}.text-link:hover{color:var(--blue)}.axis-figure{grid-template:"threat command"1fr"distant warm"1fr/1fr 1fr;min-height:520px;padding:0 0 40px 42px;display:grid;position:relative}.axis-figure:before,.axis-figure:after{content:"";background:var(--ink);position:absolute}.axis-figure:before{width:1px;height:calc(100% - 40px);bottom:40px;left:29px}.axis-figure:after{width:calc(100% - 42px);height:1px;bottom:28px;left:42px}.axis-y-label,.axis-x-label{z-index:2;font-size:11px;font-weight:700;position:absolute}.axis-y-label{writing-mode:vertical-rl;top:0;left:0}.axis-x-label{bottom:0;right:0}.axis-cell{border:1px solid var(--ink);flex-direction:column;justify-content:space-between;min-width:0;padding:28px;display:flex}.axis-cell span,.axis-cell small{font-size:12px;line-height:1.5}.axis-cell strong{margin-block:auto;font-family:Songti SC,STSong,serif;font-size:44px;font-weight:600;line-height:1}.axis-command{color:var(--white);background:var(--blue);grid-area:command}.axis-threat{color:var(--white);background:var(--red);grid-area:threat}.axis-warm{background:var(--yellow);grid-area:warm}.axis-distant{color:var(--white);background:var(--green);grid-area:distant}.topics-section{background:var(--white)}.section-heading-row{justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:48px;display:flex}.section-heading-row h2{max-width:760px}.topic-grid,.topics-directory{border-top:1px solid var(--ink);grid-template-columns:1fr 1fr;display:grid}.topic-tile{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);background:var(--white);grid-template-columns:50px 1fr auto;align-items:start;gap:20px;min-height:190px;padding:28px;transition:background-color .16s,color .16s;display:grid;position:relative}.topic-tile:nth-child(2n){border-right:0}.topic-number{font-size:12px;font-weight:700}.topic-tile h3{margin:0 0 10px;font-family:Songti SC,STSong,serif;font-size:30px;font-weight:600;line-height:1.2}.topic-tile p{max-width:460px;color:var(--muted);margin:0;font-size:14px}.topic-arrow{transition:transform .16s}.topic-tile:hover{color:var(--white)}.topic-tile:hover p{color:currentColor}.topic-tile:hover .topic-arrow{transform:translate(5px)}.topic-tile.accent-blue:hover,.topic-hero.accent-blue{background:var(--blue)}.topic-tile.accent-red:hover,.topic-hero.accent-red{background:var(--red)}.topic-tile.accent-green:hover,.topic-hero.accent-green{background:var(--green)}.topic-tile.accent-yellow:hover,.topic-hero.accent-yellow{color:var(--ink);background:var(--yellow)}.topic-tile.accent-violet:hover,.topic-hero.accent-violet{background:var(--violet)}.topic-tile.accent-orange:hover,.topic-hero.accent-orange{color:var(--ink);background:var(--orange)}.latest-section{border-top:1px solid var(--line)}.article-grid{border-top:1px solid var(--ink);border-left:1px solid var(--ink);grid-template-columns:repeat(3,1fr);display:grid}.article-card{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);background:var(--paper);min-width:0;min-height:330px}.article-card>a{flex-direction:column;height:100%;padding:24px;transition:color .16s,background-color .16s;display:flex}.article-card>a:hover{color:var(--white);background:var(--black)}.article-card-meta,.article-card-footer{justify-content:space-between;gap:16px;font-size:11px;font-weight:700;display:flex}.article-card h3{margin:34px 0 14px;font-family:Songti SC,STSong,serif;font-size:28px;font-weight:600;line-height:1.3}.article-card p{color:var(--muted);-webkit-line-clamp:3;-webkit-box-orient:vertical;margin:0 0 28px;font-size:14px;display:-webkit-box;overflow:hidden}.article-card>a:hover p{color:#d8ddd7}.article-card-footer{border-top:1px solid;align-items:flex-end;margin-top:auto;padding-top:18px}.editorial-empty{border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);grid-template-columns:140px 1fr auto;align-items:center;gap:30px;min-height:190px;padding:36px 0;display:grid}.editorial-empty>span{color:var(--blue);font-size:12px;font-weight:700}.editorial-empty h3{margin:0 0 6px;font-family:Songti SC,STSong,serif;font-size:30px;font-weight:600}.editorial-empty p{color:var(--muted);margin:0}.principles-band{color:var(--white);background:var(--black);padding:96px 0}.principles-grid{grid-template-columns:150px 1.1fr .9fr;gap:52px;display:grid}.principles-grid .section-index{color:var(--yellow)}.principle-list{border-top:1px solid #5b605b}.principle-list p{border-bottom:1px solid #5b605b;grid-template-columns:38px 1fr;gap:14px;margin:0;padding:18px 0;font-size:14px;display:grid}.principle-list span{color:var(--yellow);font-size:11px;font-weight:700}.page-heading{border-bottom:1px solid var(--ink);padding-top:112px;padding-bottom:70px}.page-heading h1,.about-hero h1,.search-page h1,.not-found h1{letter-spacing:0;max-width:1000px;margin:0;font-family:Songti SC,STSong,serif;font-size:72px;font-weight:600;line-height:1.08}.page-heading>p:last-child{max-width:680px;color:var(--muted);margin:24px 0 0;font-size:18px}.archive-section{min-height:420px;padding-top:72px;padding-bottom:112px}.archive-empty{border:1px solid var(--ink);justify-content:space-between;align-items:center;gap:24px;min-height:160px;padding:28px;display:flex}.archive-empty p{margin:0;font-family:Songti SC,STSong,serif;font-size:26px}.button-link{min-height:44px;color:var(--white);background:var(--black);place-items:center;padding:0 18px;font-size:14px;font-weight:700;display:inline-grid}.button-link:hover{background:var(--blue)}.topics-directory{margin-top:72px;margin-bottom:112px}.topic-hero{color:var(--white)}.topic-hero-inner{grid-template-columns:130px 1fr .7fr;align-items:end;gap:40px;min-height:380px;padding-top:100px;padding-bottom:52px;display:grid}.topic-hero-inner>p:first-child{font-size:12px;font-weight:700}.topic-hero h1{margin:0;font-family:Songti SC,STSong,serif;font-size:82px;font-weight:600;line-height:1}.topic-hero-inner>p:last-child{margin:0;font-size:18px}.article-page{padding:88px 0 120px}.breadcrumbs{color:var(--muted);gap:8px;margin-bottom:62px;font-size:13px;display:flex}.breadcrumbs a:hover,.article-eyebrow{color:var(--blue)}.article-header h1{margin:0;font-family:Songti SC,STSong,serif;font-size:58px;font-weight:600;line-height:1.17}.article-summary{color:var(--muted);margin:28px 0;font-size:20px;line-height:1.7}.article-byline{flex-wrap:wrap;gap:12px 24px;margin-top:36px;font-size:12px;font-weight:700;display:flex}.article-rule{width:min(100% - (var(--page-gutter) * 2), var(--page-width));background:var(--ink);height:1px;margin:68px auto}.article-content-layout{grid-template-columns:230px minmax(0,760px);justify-content:center;align-items:start;gap:72px;display:grid}.article-toc{top:calc(var(--header-height) + 24px);max-height:calc(100vh - var(--header-height) - 48px);border-top:4px solid var(--blue);font-size:12px;position:sticky;overflow-y:auto}.article-toc summary{cursor:pointer;padding:14px 0;font-weight:700}.article-toc ol{counter-reset:article-toc;margin:0;padding:0 0 12px;list-style:none}.article-toc li{border-top:1px solid var(--line);counter-increment:article-toc;grid-template-columns:24px 1fr;gap:8px;padding:8px 0;display:grid}.article-toc li:before{color:var(--blue);content:counter(article-toc, decimal-leading-zero);font-weight:700}.article-toc a{line-height:1.5}.article-toc a:hover{color:var(--blue)}.article-body{min-width:0;font-family:Songti SC,STSong,serif;font-size:18px;line-height:1.9}.article-body>:first-child{margin-top:0}.article-body h2,.article-body h3{letter-spacing:0;font-family:PingFang SC,Microsoft YaHei,sans-serif}.article-body h2{border-top:1px solid var(--line);margin:62px 0 20px;padding-top:20px;font-size:28px;line-height:1.35}.article-body h3{margin:40px 0 16px;font-size:21px}.article-body a{color:var(--blue);text-underline-offset:3px;text-decoration:underline}.article-body blockquote{border-left:5px solid var(--blue);background:var(--white);margin:36px 0;padding:24px 28px}.article-body blockquote>:first-child,.article-body blockquote>:last-child{margin-block:0}.article-body img{width:100%;height:auto;margin:36px 0}.article-body table{border-collapse:collapse;width:100%;margin:32px 0;font-family:PingFang SC,Microsoft YaHei,sans-serif;font-size:14px;display:block;overflow-x:auto}.article-body th,.article-body td{border:1px solid var(--line);text-align:left;min-width:140px;padding:12px}.article-footer{border-top:1px solid var(--ink);margin-top:74px;padding-top:28px}.tag-list{flex-wrap:wrap;gap:8px;display:flex}.tag-list a{border:1px solid var(--ink);padding:5px 9px;font-size:12px}.tag-list a:hover{color:var(--white);background:var(--black)}.article-footer>p{color:var(--muted);margin:28px 0 0;font-size:13px}.method-layout{grid-template-columns:.68fr 1.32fr;gap:90px;padding-top:82px;padding-bottom:110px;display:grid}.method-aside{top:calc(var(--header-height) + 28px);border-top:5px solid var(--blue);align-self:start;padding-top:18px;position:sticky}.method-aside p{color:var(--blue);margin:0 0 16px;font-size:12px;font-weight:700}.method-aside strong{font-family:Songti SC,STSong,serif;font-size:31px;font-weight:600;line-height:1.35}.method-content section{border-top:1px solid var(--ink);grid-template-columns:52px 1fr;gap:24px;padding:36px 0;display:grid}.method-content section:last-child{border-bottom:1px solid var(--ink)}.method-content section>span{color:var(--blue);font-size:12px;font-weight:700}.method-content h2{grid-column:2;font-size:30px}.method-content p{color:var(--muted);grid-column:2;margin:0}.evidence-band{background:var(--yellow);padding:72px 0}.evidence-grid{grid-template-columns:1fr repeat(3,.75fr);align-items:center;gap:28px;display:grid}.evidence-grid>div{border-left:1px solid var(--ink);align-items:center;gap:16px;min-height:84px;padding-left:20px;display:flex}.evidence-grid strong{font-family:Songti SC,STSong,serif;font-size:46px}.evidence-grid span{font-size:13px}.about-hero{padding-top:132px;padding-bottom:100px}.about-hero h1{font-size:94px}.about-hero>p:last-child{max-width:800px;margin:42px 0 0 auto;font-family:Songti SC,STSong,serif;font-size:28px;line-height:1.6}.about-split{border-top:1px solid var(--ink);border-left:1px solid var(--ink);grid-template-columns:repeat(3,1fr);margin-bottom:120px;display:grid}.about-split>div{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);min-height:340px;padding:30px}.about-split h2{margin:0;font-family:Songti SC,STSong,serif;font-size:100px;font-weight:600;line-height:1}.about-split p{color:var(--muted);margin:110px 0 0}.search-page{min-height:680px;padding-top:112px;padding-bottom:120px}.search-page h1{margin-bottom:54px}.search-field{border-bottom:2px solid var(--ink);grid-template-columns:32px 1fr;align-items:center;min-height:72px;display:grid}.search-field input{width:100%;min-width:0;color:var(--ink);background:0 0;border:0;outline:0;padding:18px 0;font-size:21px}.search-field input::placeholder{color:#8a8f89}.search-status{color:var(--muted);margin:18px 0 36px;font-size:13px}.search-results{border-top:1px solid var(--ink)}.search-results a{border-bottom:1px solid var(--ink);grid-template-columns:180px 1fr 1fr;align-items:start;gap:28px;padding:28px 0;display:grid}.search-results a:hover h2{color:var(--blue)}.search-results span{font-size:11px;font-weight:700}.search-results h2{margin:0;font-family:Songti SC,STSong,serif;font-size:25px}.search-results p{color:var(--muted);margin:0;font-size:14px}.not-found{min-height:720px;padding-top:130px;padding-bottom:120px}.not-found>span{color:var(--red);font-family:Songti SC,STSong,serif;font-size:128px;line-height:1}.not-found p{color:var(--muted);margin:24px 0 36px}.site-footer{color:var(--white);background:var(--black);padding:70px 0 38px}.footer-grid{grid-template-columns:1.2fr .8fr 1fr;gap:60px;display:grid}.footer-wordmark{margin:0 0 18px;font-family:Songti SC,STSong,serif;font-size:48px;font-weight:600;line-height:1}.footer-brand>p:last-child,.footer-note p{color:#b8bdb7;font-size:13px}.site-footer nav{align-content:start;display:grid}.site-footer nav a{border-bottom:1px solid #494d49;align-items:center;gap:6px;padding:9px 0;font-size:13px;display:flex}.site-footer nav a:hover{color:var(--yellow)}.footer-note{flex-direction:column;justify-content:space-between;display:flex}.footer-note p{margin:0}@media (width<=980px){:root{--page-gutter:24px}.desktop-nav{display:none}.header-inner{grid-template-columns:1fr auto}.mobile-menu{display:block}.mobile-menu nav{top:var(--header-height);width:100%;padding:16px var(--page-gutter) 26px;border-bottom:1px solid var(--ink);background:var(--paper);display:grid;position:absolute;left:0}.mobile-menu nav a{border-bottom:1px solid var(--line);padding:13px 0;font-family:Songti SC,STSong,serif;font-size:21px}.home-hero h1{font-size:80px}.framework-grid,.method-layout{grid-template-columns:1fr;gap:60px}.axis-figure{min-height:500px}.article-grid{grid-template-columns:repeat(2,1fr)}.principles-grid{grid-template-columns:120px 1fr}.principle-list{grid-column:2}.topic-hero-inner{grid-template-columns:90px 1fr}.topic-hero-inner>p:last-child{grid-column:2}.method-aside{position:static}.article-content-layout{grid-template-columns:1fr;gap:44px;max-width:820px}.article-toc{max-height:none;position:static}.evidence-grid{grid-template-columns:1fr 1fr}.evidence-grid h2{grid-column:1/-1}.about-hero h1{font-size:76px}.footer-grid{grid-template-columns:1fr 1fr}.footer-note{border-top:1px solid #494d49;grid-column:1/-1;gap:18px;padding-top:24px}}@media (width<=680px){:root{--header-height:60px;--page-gutter:18px}.brand-mark{width:30px;height:30px}.brand-name{font-size:19px}.home-hero{min-height:540px}.home-hero>img{object-position:58% 50%}.hero-content{padding-bottom:28px}.home-hero h1{font-size:56px}.hero-bottom{flex-direction:column;align-items:flex-start;margin-top:24px}.hero-bottom>p{font-size:20px}.photo-credit{top:12px;right:12px}.framework-section,.topics-section,.latest-section{padding:72px 0}.section-intro h2,.section-heading-row h2,.principles-grid h2,.evidence-grid h2{font-size:34px}.axis-figure{min-height:520px;padding-left:28px}.axis-figure:before{left:17px}.axis-figure:after{width:calc(100% - 28px);left:28px}.axis-y-label{left:-8px}.axis-cell{padding:17px 14px}.axis-cell strong{font-size:31px}.axis-cell small{font-size:10px}.section-heading-row{flex-direction:column;align-items:flex-start;margin-bottom:34px}.topic-grid,.topics-directory{grid-template-columns:1fr}.topic-tile,.topic-tile:nth-child(2n){border-right:0;grid-template-columns:40px 1fr auto;min-height:170px;padding:22px 18px}.topic-tile h3{font-size:26px}.article-grid{grid-template-columns:1fr}.article-card{min-height:300px}.editorial-empty{grid-template-columns:1fr;gap:18px}.principles-grid{grid-template-columns:1fr;gap:28px}.principle-list{grid-column:auto}.page-heading{padding-top:78px;padding-bottom:50px}.page-heading h1,.about-hero h1,.search-page h1,.not-found h1{font-size:42px}.archive-section,.topics-directory{padding-top:50px;padding-bottom:78px}.topics-directory{margin-top:50px;margin-bottom:78px;padding-top:0}.archive-empty{flex-direction:column;align-items:flex-start}.topic-hero-inner{min-height:330px;padding-top:78px;padding-bottom:38px;display:block}.topic-hero h1{margin:36px 0 24px;font-size:58px}.article-page{padding-top:54px}.breadcrumbs{margin-bottom:42px}.article-header h1{font-size:40px}.article-summary{font-size:18px}.article-rule{margin-top:48px;margin-bottom:48px}.article-body{font-size:17px}.article-content-layout{gap:34px}.method-layout{padding-top:54px;padding-bottom:80px}.method-content section{grid-template-columns:34px 1fr;gap:14px}.method-content h2{font-size:25px}.evidence-grid{grid-template-columns:1fr}.evidence-grid h2{grid-column:auto}.about-hero{padding-top:84px;padding-bottom:66px}.about-hero>p:last-child{margin-top:34px;font-size:21px}.about-split{grid-template-columns:1fr;margin-bottom:80px}.about-split>div{min-height:250px}.about-split h2{font-size:76px}.about-split p{margin-top:66px}.search-page{min-height:580px;padding-top:78px}.search-field input{font-size:17px}.search-results a{grid-template-columns:1fr;gap:8px}.not-found>span{font-size:92px}.footer-grid{grid-template-columns:1fr;gap:40px}.footer-note{grid-column:auto}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important}}