:root{--bg:#080A0D;--panel:#0D1015;--aux:#12161C;--deeper:#171C23;--hover:#1B2129;--heading:#F5F7FA;--text:#C7CDD5;--muted:#9098A3;--blue:#5C7CFA;--bright:#6EA8FF;--ice:#8ED8FF;--violet:#7775FF;--line:rgba(255,255,255,.09);--strong:rgba(255,255,255,.16)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif;overflow-wrap:break-word}button,a{font:inherit}a{color:var(--bright);text-decoration:none}a:hover{text-decoration:underline;color:var(--ice)}a:focus-visible,button:focus-visible{outline:3px solid var(--ice);outline-offset:3px}button{cursor:pointer}h1,h2,h3{color:var(--heading);line-height:1.38;letter-spacing:-.015em}h1{font-size:34px}h2{font-size:25px}h3{font-size:19px}p{margin:0 0 17px}img{max-width:100%;height:auto}figure{margin:0}ul,ol{padding-left:25px}li{margin-bottom:6px}strong,b{color:var(--heading)}.skip-link{position:absolute;z-index:99;top:-60px;left:12px;background:var(--blue);color:white;padding:10px}.skip-link:focus{top:10px}
.site-header{height:68px;position:sticky;top:0;z-index:50;background:rgba(8,10,13,.96);border-bottom:1px solid var(--line)}.header-inner{max-width:1200px;margin:auto;padding:0 24px;display:flex;align-items:center;gap:21px;height:100%}.brand{display:flex;align-items:center;gap:9px;flex-shrink:0;color:var(--heading);min-width:0}.brand:hover{text-decoration:none}.brand-image{width:auto;max-width:88px;max-height:36px}.brand-image img{max-height:36px;width:auto;object-fit:contain}.brand-image .media-missing{display:none}.brand-fallback{font-size:17px;font-weight:800;line-height:1.2;white-space:nowrap}.brand-fallback small{display:block;color:var(--muted);font-size:8px;letter-spacing:.05em;font-weight:400;margin-top:3px}.desktop-nav{display:flex;align-items:center;gap:20px;margin-left:auto;white-space:nowrap}.desktop-nav a{font-size:14px;color:var(--text)}.desktop-nav a[aria-current=page],.channel-links a[aria-current=page]{color:var(--ice);font-weight:700}.header-cta{background:var(--blue);color:#fff!important;border-radius:8px;padding:7px 14px;font-size:14px;font-weight:700;white-space:nowrap}.header-cta:hover{background:var(--bright);text-decoration:none}.menu-toggle{border:1px solid var(--strong);border-radius:8px;background:var(--aux);color:var(--heading);font-size:14px;padding:6px 12px;white-space:nowrap}.menu-toggle span{margin-left:5px}.menu-toggle:hover{background:var(--hover)}.menu-backdrop{position:fixed;inset:68px 0 0;background:rgba(0,0,0,.53);z-index:51}.site-menu{position:absolute;right:max(24px,calc((100vw - 1200px)/2 + 24px));top:67px;z-index:52;width:min(710px,calc(100vw - 48px));max-height:calc(90vh - 78px);overflow-y:auto;background:var(--aux);border:1px solid var(--strong);box-shadow:0 20px 55px rgba(0,0,0,.4);border-radius:0 0 14px 14px;padding:20px}.site-menu[hidden],.menu-backdrop[hidden]{display:none!important}.menu-head{display:flex;justify-content:space-between;align-items:center}.menu-head strong{font-size:18px}.menu-close{border:1px solid var(--strong);border-radius:7px;background:transparent;color:var(--text);padding:3px 11px}.menu-map{margin:15px 0 0}.full-map{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.full-map section{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:15px;min-width:0}.full-map h3{font-size:17px;margin:0 0 10px}.full-map ul{list-style:none;padding:0;margin:0}.full-map li{margin:5px 0;font-size:14px}
.content-wrap{width:min(1200px,calc(100% - 48px));margin:0 auto}.site-main{min-height:75vh}.breadcrumb{display:flex;gap:12px;font-size:13px;color:var(--muted);margin:26px 0 12px}.page-heading{max-width:850px}.page-heading h1{margin:0 0 10px}.page-heading p{color:var(--muted);font-size:17px;margin:0}.channel-links{display:flex;gap:7px;flex-wrap:wrap;align-items:center;margin:26px 0 32px;border-bottom:1px solid var(--line);padding-bottom:19px}.channel-links>span{color:var(--muted);font-size:13px;margin-right:5px}.channel-links a{border:1px solid var(--line);padding:4px 10px;border-radius:6px;font-size:13px;color:var(--text)}.channel-links a:hover{background:var(--hover)}.page-body{margin-bottom:46px}.page-body>p,.page-body>.reading-section{max-width:1040px}.reading-section{margin:38px 0}.reading-section h2{margin:0 0 16px}.reading-section h3{margin:0 0 10px}.reading-section p,.essay p,.longform p{line-height:1.83}.reading-section>p,.longform>.reading-section>p,.essay>.reading-section>p{max-width:810px}.note{margin:26px 0;border-left:3px solid var(--blue);background:var(--aux);padding:15px 19px;font-size:15px;border-radius:0 9px 9px 0;max-width:820px}.eyebrow{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--bright);font-weight:bold}.tile-grid,.question-grid,.purpose-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.tile,.purpose-grid article,.question,.choice-grid>div{padding:23px;border-radius:10px;background:var(--panel);border:1px solid var(--line);min-width:0}.tile h3{margin:0 0 8px}.tile p{margin:0}.tile:hover,.question:hover{border-color:var(--strong)}.number-list{counter-reset:item;max-width:800px}.number-list li{padding:6px 0}.table-scroll{overflow-x:auto;max-width:1060px;border-radius:9px;border:1px solid var(--line)}table{border-collapse:collapse;width:100%;min-width:520px;font-size:14px;line-height:1.6}th,td{text-align:left;padding:13px 15px;border-bottom:1px solid var(--line);vertical-align:top}th{background:var(--deeper);color:var(--heading);font-weight:700}tr:last-child td{border-bottom:0}tbody tr:nth-child(even){background:var(--panel)}.media-natural,.media-frame{display:grid;place-items:center;min-width:0;padding:8px;border-radius:12px;background:#0D1015}.media-natural>img{display:block;width:auto;height:auto;max-width:100%;max-height:var(--image-max-height,280px);object-fit:contain;object-position:center}.media-frame{width:100%;aspect-ratio:var(--media-ratio,16/9)}.media-frame>img{display:block;width:100%;height:100%;object-fit:contain;object-position:center}.media-missing{min-height:150px;display:grid;place-items:center;text-align:center;color:var(--muted);border-radius:12px;border:1px dashed var(--strong);background:var(--panel);font-size:13px;padding:15px}.media-text{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:26px;align-items:center;max-width:1000px}.media-text>.media-natural{--image-max-height:280px}.media-text>div{min-width:0}.gallery-essays{max-width:830px}.gallery-essays article{margin:38px 0}.gallery-essays .media-natural{--image-max-height:450px;margin:12px 0 18px}.gallery-essays h2{margin-bottom:15px}.small-visual{max-width:590px;margin:25px 0}.small-visual .media-natural{--image-max-height:180px}.small-visual p,.small-note{font-size:13px;color:var(--muted);margin-top:9px}
.home-title{font-size:38px;max-width:940px;margin:46px 0 20px}.index-intro{display:grid;grid-template-columns:2fr 1fr;gap:32px;align-items:start}.lead-copy{max-width:800px}.lead-copy p{font-size:17px}.index-cues{display:grid;gap:9px;margin:4px 0}.index-cues span{border-left:2px solid var(--blue);background:var(--panel);padding:8px 12px;font-size:14px;color:var(--heading)}.poster-alone{max-width:1000px;margin:35px auto 38px}.poster-alone .media-natural{--image-max-height:260px}.poster-alone .media-missing{min-height:180px}.section-heading{margin-bottom:17px}.section-heading h2{margin-bottom:7px}.section-heading p{color:var(--muted)}.question{display:block;color:var(--text)}.question:hover{text-decoration:none}.question span{color:var(--bright);font-size:12px}.question h3{margin:9px 0 11px}.question p{font-size:15px;margin:0}.editorial-split{display:grid;grid-template-columns:1.6fr 1fr;gap:34px}.editorial-main{background:var(--panel);border:1px solid var(--line);padding:26px;border-radius:10px}.editorial-main h2{margin-top:10px}.editorial-mini{border-top:2px solid var(--blue);padding-top:12px}.editorial-mini p{padding-bottom:11px;border-bottom:1px solid var(--line)}.three-media{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.three-media figure{min-width:0}.three-media figcaption{font-size:14px;line-height:1.7;margin-top:8px;color:var(--muted)}.three-media .media-natural{--image-max-height:225px}.rule-band{display:flex;justify-content:space-between;align-items:center;gap:26px;padding:24px 28px;background:var(--aux);border:1px solid var(--line);border-radius:12px;margin:40px 0}.rule-band h2{margin:9px 0}.rule-band p{margin:0;max-width:750px}.rule-links{display:grid;gap:12px;min-width:125px}.path-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.path-steps>div{border-left:2px solid var(--blue);padding:10px 15px;background:var(--panel)}.path-steps p{font-size:14px;margin:8px 0}.service-end nav{display:flex;gap:16px;flex-wrap:wrap;margin:14px 0}.wide-intro{font-size:18px;border-bottom:1px solid var(--line);max-width:1000px;padding:10px 0 16px}.longform,.essay{max-width:805px}.dropcap::first-letter{font-size:2.4em;color:var(--ice);float:left;line-height:1;padding-right:8px}.side-terms{background:var(--deeper);border:1px solid var(--line);padding:20px;border-radius:9px;margin:25px 0}.side-terms h3{margin-top:0}.side-terms p{font-size:14px;margin:7px 0}.phase-list{max-width:980px}.phase{display:grid;grid-template-columns:120px 1fr;gap:22px;border-top:1px solid var(--line);padding:22px 0}.phase>span{color:var(--bright);font-size:13px}.phase h2{margin:0 0 9px}.phase p{margin:0}.demo-label{display:inline-block;font-size:12px;background:var(--deeper);padding:4px 11px;margin:0 0 12px;border:1px solid var(--strong)}.topic-pillar{border-left:3px solid var(--blue);padding:12px 18px;margin:20px 0;background:var(--aux)}.topic-pillar p{margin:5px 0}.flow-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.flow-steps>div{background:var(--panel);border-top:2px solid var(--blue);padding:16px}.flow-steps b,.flow-steps span{display:block}.flow-steps span{font-size:14px;margin-top:9px}.anchor-nav{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:24px}.anchor-nav a{padding:5px 13px;border:1px solid var(--strong);border-radius:6px}.term-group{max-width:900px;margin:34px 0}.term-group dl{margin:0}.term-group dt{color:var(--heading);font-weight:bold;font-size:18px;margin:13px 0 3px}.term-group dd{margin:0;padding:0 0 13px;border-bottom:1px solid var(--line)}.term-group b{color:var(--ice)}.observation-bars>div{display:grid;grid-template-columns:260px 1fr;gap:20px;margin-bottom:10px;padding:20px;border:1px solid var(--line);border-radius:10px;background:var(--panel)}.observation-bars h2{margin:0;font-size:21px}.observation-bars p{margin:0}.hero-media .media-natural{--image-max-height:320px}.catalogue-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.catalogue-card{background:var(--panel);border:1px solid var(--line);padding:10px;border-radius:10px;min-width:0}.catalogue-card .media-frame{--image-max-height:180px}.catalogue-card figcaption{padding:7px 4px;display:grid;gap:3px;font-size:13px}.catalogue-card figcaption span{color:var(--muted)}.bookmark-list{max-width:950px}.bookmark-list article{display:grid;grid-template-columns:60px 1fr;gap:18px;border-bottom:1px solid var(--line);padding:22px 0}.bookmark-list article>span{font-size:24px;color:var(--bright);font-weight:bold}.bookmark-list h2{font-size:21px;margin:0 0 9px}.bookmark-list p{margin:0 0 9px}.feature-thesis{background:var(--aux);padding:24px;border-left:4px solid var(--blue);max-width:860px}.feature-thesis p{font-size:18px;margin:8px 0 0}.feature-path{background:var(--panel);padding:13px 20px;font-size:14px;max-width:810px}.analysis-opening{padding:20px 0;max-width:870px;border-bottom:1px solid var(--strong)}.choice-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.choice-grid h3{margin-top:0}.choice-grid p{margin:0}.purpose-grid{margin-bottom:37px}.purpose-grid h2{font-size:20px;margin-top:0}.purpose-grid p{font-size:14px}.page-categories .full-map{max-width:1080px}.mobile-guide{display:grid;grid-template-columns:300px minmax(0,1fr);gap:35px;max-width:950px}.mobile-guide .media-natural{--image-max-height:355px}.mobile-guide .reading-section{margin:0 0 23px}.risk-cases,.diagnostic,.faq-list{max-width:900px}.risk-cases article,.diagnostic article,.faq-list section{border-bottom:1px solid var(--line);padding:16px 0}.risk-cases h2,.diagnostic h2,.faq-list h2{font-size:21px;margin:0 0 10px}.risk-cases p,.diagnostic p,.faq-list p{margin:0 0 10px}.about-statement,.boundary-lead{border-left:4px solid var(--blue);max-width:850px;padding:18px 25px;background:var(--panel)}.about-statement h2,.boundary-lead h2{margin:0 0 13px}.about-statement p,.boundary-lead p{margin:0}.related{margin:40px 0 60px;padding:19px 22px;border-top:1px solid var(--strong);background:var(--panel);border-radius:0 0 10px 10px}.related h2{font-size:20px;margin:0 0 10px}.related ul{display:flex;flex-wrap:wrap;gap:12px 25px;padding:0;list-style:none;margin:0}.related li{margin:0}.site-footer{background:#050608;border-top:1px solid var(--line)}.footer-wrap{max-width:1200px;margin:auto;padding:34px 24px 25px}.footer-brand{display:flex;align-items:baseline;gap:15px}.footer-brand strong{font-size:21px}.footer-brand span{font-size:11px;color:var(--muted)}.footer-brand p{margin:0 0 14px}.site-footer nav{display:flex;gap:20px;flex-wrap:wrap;margin-bottom:14px}.site-footer nav a{font-size:14px}.foot-disclaimer{font-size:12px;color:var(--muted);max-width:910px;margin:0}
@media(max-width:1080px){.desktop-nav{gap:10px}.header-inner{gap:12px}.brand-fallback small{display:none}.desktop-nav a{font-size:13px}}
@media(max-width:980px){.desktop-nav{display:none}.menu-toggle{margin-left:auto}.full-map{grid-template-columns:repeat(2,minmax(0,1fr))}.catalogue-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.observation-bars>div{grid-template-columns:1fr}}
@media(max-width:767px){body{font-size:15.5px}.site-header{height:64px}.header-inner{padding:0 16px;gap:9px}.brand{max-width:105px}.brand-image{max-width:90px}.brand-fallback{font-size:15px}.brand-fallback small{display:none}.menu-toggle{padding:7px 9px;min-height:44px;min-width:62px}.header-cta{padding:8px 10px;min-height:44px;display:flex;align-items:center;font-size:13px}.content-wrap{width:calc(100% - 32px)}.breadcrumb{margin-top:20px}.page-heading h1{font-size:27px}.page-heading p{font-size:15px}.home-title{font-size:29px;margin:30px 0 16px}.index-intro{grid-template-columns:1fr;gap:10px}.lead-copy p{font-size:16px}.index-cues{grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}.index-cues span{font-size:12px;padding:7px}.poster-alone{margin:24px 0}.poster-alone .media-natural{--image-max-height:170px}.poster-alone .media-missing{min-height:110px}.reading-section{margin:27px 0}.reading-section h2{font-size:21px}.reading-section h3{font-size:18px}.question-grid,.tile-grid,.purpose-grid,.editorial-split,.media-text,.mobile-guide{grid-template-columns:1fr;gap:14px}.tile,.question,.purpose-grid article{padding:18px}.three-media{grid-template-columns:1fr;gap:24px}.three-media .media-natural{--image-max-height:205px}.rule-band{display:block;padding:19px}.rule-links{display:flex;margin-top:16px}.path-steps{grid-template-columns:1fr}.full-map{grid-template-columns:1fr;gap:8px}.full-map section{padding:10px 14px}.full-map ul{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px}.site-menu{position:fixed;top:auto;bottom:0;left:0;right:0;width:100%;max-height:85vh;max-height:85dvh;overflow:auto;border-radius:16px 16px 0 0;padding:18px 16px calc(19px + env(safe-area-inset-bottom));box-shadow:0 -15px 50px rgba(0,0,0,.5)}.site-menu .full-map{gap:10px}.site-menu .full-map section{border-color:var(--line)}.menu-backdrop{inset:64px 0 0}.phase{grid-template-columns:1fr;gap:4px}.flow-steps{grid-template-columns:repeat(2,minmax(0,1fr))}.observation-bars>div{padding:16px}.catalogue-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.catalogue-card .media-frame{max-height:165px}.catalogue-card{padding:7px}.choice-grid{grid-template-columns:1fr}.mobile-guide .media-natural{--image-max-height:280px}.related{margin-bottom:35px}.channel-links{margin:20px 0 27px}.footer-wrap{padding:26px 16px}.footer-brand{display:block}.footer-brand span{display:block}}
@media(max-width:350px){.header-inner{gap:6px}.brand{max-width:92px}.brand-fallback{font-size:13px}.header-cta{padding:7px 8px;font-size:12px}.menu-toggle{font-size:12px;min-width:55px;padding:7px 6px}.menu-toggle span{margin-left:2px}.catalogue-grid{grid-template-columns:1fr 1fr}.index-cues span{font-size:11px}.full-map ul{grid-template-columns:1fr 1fr}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}